/* roulang page: index */
:root {
      --color-primary: #00C896;
      --color-primary-dark: #00A87E;
      --color-secondary: #7B5CFF;
      --color-accent: #FF8A2A;
      --color-dark: #111318;
      --color-dark-soft: #1B1F25;
      --color-text: #1F2328;
      --color-muted: #667085;
      --color-subtle: #F6F8FA;
      --color-card: #FFFFFF;
      --color-border: #E4E7EC;
      --color-line: rgba(255,255,255,0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 8px 24px rgba(16,24,40,0.08);
      --shadow-md: 0 14px 34px rgba(16,24,40,0.12);
      --container: 1200px;
      --transition: 180ms ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--color-text);
      background: var(--color-subtle);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
    }

    a:hover {
      color: var(--color-primary-dark);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
      background: none;
    }

    :focus-visible {
      outline: 3px solid rgba(0, 200, 150, 0.35);
      outline-offset: 3px;
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.94);
      border-bottom: 1px solid var(--color-border);
      backdrop-filter: blur(12px);
    }

    .nav-wrap {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      color: var(--color-dark);
      white-space: nowrap;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.22);
    }

    .brand-text {
      font-size: 18px;
      letter-spacing: 0;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 4px;
      list-style: none;
    }

    .nav-menu a {
      display: inline-flex;
      align-items: center;
      height: 40px;
      padding: 0 12px;
      border-radius: 10px;
      color: #424A55;
      font-size: 15px;
      font-weight: 650;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--color-dark);
      background: rgba(0, 200, 150, 0.12);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-dark);
      align-items: center;
      justify-content: center;
    }

    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after {
      display: block;
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 4px;
      position: relative;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
    }

    .menu-toggle span::before {
      top: -7px;
    }

    .menu-toggle span::after {
      top: 7px;
    }

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 18px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 750;
      border: 1px solid transparent;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #082018;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.25);
    }

    .btn-primary:hover {
      background: var(--color-primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(0, 168, 126, 0.30);
    }

    .btn-secondary {
      background: #fff;
      border-color: var(--color-border);
      color: var(--color-text);
    }

    .btn-secondary:hover {
      border-color: var(--color-primary);
      color: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    .btn-dark {
      background: rgba(255,255,255,0.08);
      border-color: rgba(255,255,255,0.22);
      color: #fff;
    }

    .btn-dark:hover {
      background: rgba(0,200,150,0.16);
      border-color: var(--color-primary);
      color: #fff;
      transform: translateY(-2px);
    }

    .hero {
      position: relative;
      background:
        linear-gradient(90deg, rgba(17,19,24,0.96), rgba(17,19,24,0.90)),
        radial-gradient(circle at 72% 30%, rgba(0,200,150,0.30), transparent 34%),
        radial-gradient(circle at 90% 72%, rgba(123,92,255,0.22), transparent 30%),
        #111318;
      color: #fff;
      padding: 56px 0 34px;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 46px 46px;
      opacity: 0.26;
      pointer-events: none;
    }

    .hero-shell {
      position: relative;
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 34px;
      align-items: center;
    }

    .hero-kicker,
    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 750;
    }

    .hero-kicker {
      background: rgba(0,200,150,0.13);
      border: 1px solid rgba(0,200,150,0.35);
      color: #A8FFE5;
      margin-bottom: 18px;
    }

    .hero-kicker::before,
    .section-kicker::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--color-primary);
    }

    h1 {
      font-size: clamp(30px, 4.8vw, 46px);
      line-height: 1.2;
      letter-spacing: 0;
      max-width: 760px;
      font-weight: 950;
    }

    .hero-lead {
      max-width: 700px;
      margin-top: 18px;
      color: #DCE5E1;
      font-size: 18px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 26px;
    }

    .signal-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 26px;
      max-width: 710px;
    }

    .signal-item {
      border: 1px solid rgba(255,255,255,0.16);
      background: rgba(255,255,255,0.06);
      border-radius: 12px;
      padding: 12px 14px;
    }

    .signal-num {
      display: block;
      color: var(--color-primary);
      font-size: 20px;
      font-weight: 950;
      line-height: 1.2;
    }

    .signal-text {
      color: #BFC8C5;
      font-size: 13px;
      margin-top: 4px;
    }

    .hero-panel {
      display: grid;
      grid-template-columns: 0.92fr 1.08fr;
      gap: 16px;
      align-items: stretch;
    }

    .launch-card,
    .ticker-card {
      border: 1px solid rgba(255,255,255,0.16);
      background: rgba(255,255,255,0.07);
      border-radius: 16px;
      box-shadow: 0 18px 44px rgba(0,0,0,0.22);
    }

    .launch-card {
      padding: 18px;
      min-height: 390px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .app-topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 16px;
    }

    .app-icon {
      width: 54px;
      height: 54px;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
      display: grid;
      place-items: center;
      color: #111318;
      font-weight: 950;
      font-size: 22px;
    }

    .status-dot {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: #C7FFF0;
    }

    .status-dot::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-primary);
      box-shadow: 0 0 0 5px rgba(0,200,150,0.12);
    }

    .mock-screen {
      border-radius: 14px;
      background: #0B0D10;
      border: 1px solid rgba(255,255,255,0.12);
      padding: 14px;
      min-height: 188px;
      display: grid;
      gap: 10px;
    }

    .screen-line {
      height: 14px;
      border-radius: 999px;
      background: rgba(255,255,255,0.12);
    }

    .screen-line.short {
      width: 62%;
      background: rgba(0,200,150,0.32);
    }

    .screen-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
    }

    .screen-tile {
      height: 58px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(0,200,150,0.24), rgba(123,92,255,0.20));
      border: 1px solid rgba(255,255,255,0.10);
    }

    .version-list {
      list-style: none;
      margin-top: 16px;
      display: grid;
      gap: 8px;
    }

    .version-list li {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      color: #D7DEDB;
      font-size: 14px;
      border-bottom: 1px dashed rgba(255,255,255,0.16);
      padding-bottom: 8px;
    }

    .version-list strong {
      color: #fff;
      font-weight: 800;
    }

    .ticker-card {
      padding: 18px;
    }

    .ticker-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 14px;
    }

    .ticker-title strong {
      font-size: 18px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      min-height: 24px;
      padding: 0 9px;
      border-radius: 999px;
      color: var(--color-dark);
      background: var(--color-primary);
      font-size: 12px;
      font-weight: 850;
    }

    .badge.purple {
      background: rgba(123,92,255,0.14);
      color: #5A42D9;
    }

    .badge.orange {
      background: rgba(255,138,42,0.14);
      color: #B35405;
    }

    .ticker-list {
      list-style: none;
      display: grid;
      gap: 12px;
    }

    .ticker-list a {
      display: block;
      padding: 12px;
      border-radius: 12px;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.10);
      color: #fff;
    }

    .ticker-list a:hover {
      border-color: rgba(0,200,150,0.55);
      transform: translateY(-2px);
    }

    .ticker-list span {
      display: block;
      color: #A9B4B0;
      font-size: 13px;
      margin-top: 3px;
    }

    main {
      background: var(--color-subtle);
    }

    .section {
      padding: 72px 0;
    }

    .section.compact {
      padding: 48px 0;
    }

    .section.dark {
      background: var(--color-dark);
      color: #fff;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-kicker {
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      margin-bottom: 10px;
    }

    .section.dark .section-kicker {
      color: #AAFFE7;
      border: 1px solid rgba(0,200,150,0.25);
    }

    h2 {
      font-size: clamp(24px, 3vw, 34px);
      line-height: 1.28;
      letter-spacing: 0;
      font-weight: 950;
      color: var(--color-dark);
    }

    .section.dark h2 {
      color: #fff;
    }

    .section-desc {
      max-width: 640px;
      color: var(--color-muted);
      margin-top: 10px;
      font-size: 16px;
    }

    .section.dark .section-desc {
      color: #B9C2BF;
    }

    .quick-strip {
      margin-top: -26px;
      position: relative;
      z-index: 3;
    }

    .quick-inner {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 12px;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
      padding: 14px;
    }

    .quick-link {
      min-height: 72px;
      border-radius: 12px;
      background: #F9FAFB;
      border: 1px solid transparent;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px;
      font-weight: 850;
      color: var(--color-text);
    }

    .quick-link:hover {
      background: rgba(0,200,150,0.08);
      border-color: rgba(0,200,150,0.28);
      transform: translateY(-2px);
    }

    .quick-icon {
      width: 34px;
      height: 34px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: var(--color-dark);
      color: var(--color-primary);
      flex: 0 0 auto;
      font-weight: 950;
    }

    .news-layout {
      display: grid;
      grid-template-columns: 1.06fr 0.94fr;
      gap: 24px;
    }

    .feature-news {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .feature-news:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .news-visual {
      min-height: 256px;
      background:
        linear-gradient(135deg, rgba(0,200,150,0.82), rgba(123,92,255,0.80)),
        repeating-linear-gradient(45deg, rgba(255,255,255,0.12) 0 2px, transparent 2px 12px);
      display: flex;
      align-items: flex-end;
      padding: 22px;
      color: #fff;
    }

    .news-visual strong {
      font-size: 28px;
      line-height: 1.25;
      max-width: 420px;
    }

    .feature-body {
      padding: 22px;
    }

    .meta-row {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      color: var(--color-muted);
      font-size: 13px;
      margin-bottom: 12px;
    }

    .feature-body h3,
    .download-copy h3,
    .topic-card h3,
    .proof-card h3,
    .step-card h3 {
      font-size: 21px;
      line-height: 1.35;
      letter-spacing: 0;
      color: var(--color-dark);
      margin-bottom: 8px;
    }

    .feature-body p,
    .topic-card p,
    .proof-card p,
    .step-card p {
      color: var(--color-muted);
      font-size: 15px;
    }

    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: 16px;
      color: var(--color-primary-dark);
      font-weight: 850;
    }

    .text-link:hover {
      text-decoration: underline;
    }

    .news-list {
      display: grid;
      gap: 12px;
      list-style: none;
    }

    .news-item a {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      align-items: start;
      padding: 16px;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 14px;
      box-shadow: 0 6px 18px rgba(16,24,40,0.05);
    }

    .news-item a:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
      border-color: rgba(0,200,150,0.34);
    }

    .date-box {
      width: 54px;
      border-radius: 12px;
      background: var(--color-dark);
      color: #fff;
      text-align: center;
      padding: 8px 6px;
      line-height: 1.15;
      font-weight: 900;
    }

    .date-box small {
      display: block;
      color: var(--color-primary);
      font-size: 12px;
      margin-top: 3px;
    }

    .news-item h3 {
      font-size: 17px;
      line-height: 1.45;
      letter-spacing: 0;
      color: var(--color-text);
      margin-bottom: 4px;
    }

    .news-item a:hover h3 {
      color: var(--color-primary-dark);
    }

    .news-item p {
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.6;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .download-zone {
      display: grid;
      grid-template-columns: 0.92fr 1.08fr;
      gap: 32px;
      align-items: center;
    }

    .device-board {
      position: relative;
      min-height: 470px;
      border-radius: 18px;
      background:
        linear-gradient(135deg, rgba(255,255,255,0.10), rgba(255,255,255,0.04)),
        #191D23;
      border: 1px solid rgba(255,255,255,0.14);
      padding: 24px;
      overflow: hidden;
    }

    .device-board::after {
      content: "";
      position: absolute;
      inset: auto 24px 24px 24px;
      height: 110px;
      background: linear-gradient(180deg, transparent, rgba(0,0,0,0.22));
      pointer-events: none;
    }

    .phone-frame {
      width: min(250px, 72%);
      margin: 0 auto;
      min-height: 410px;
      border: 10px solid #0A0C0F;
      border-radius: 30px;
      background: #F8FAFC;
      padding: 18px;
      box-shadow: 0 30px 70px rgba(0,0,0,0.34);
      position: relative;
      z-index: 1;
    }

    .phone-head {
      height: 26px;
      border-radius: 999px;
      background: #111318;
      width: 94px;
      margin: 0 auto 18px;
    }

    .phone-banner {
      min-height: 96px;
      border-radius: 16px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      padding: 14px;
      font-weight: 900;
      line-height: 1.35;
    }

    .phone-cards {
      display: grid;
      gap: 10px;
      margin-top: 14px;
    }

    .phone-card {
      height: 54px;
      border-radius: 12px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: 0 6px 16px rgba(16,24,40,0.06);
    }

    .download-copy {
      color: #fff;
    }

    .download-copy h2 {
      color: #fff;
    }

    .download-copy p {
      color: #C8D2CF;
      margin-top: 10px;
      max-width: 650px;
    }

    .download-info {
      display: grid;
      grid-template-columns: 1fr 152px;
      gap: 18px;
      margin-top: 24px;
    }

    .info-card,
    .qr-card {
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,0.14);
      background: rgba(255,255,255,0.07);
      padding: 18px;
    }

    .tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin: 16px 0;
    }

    .system-tag {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 0 10px;
      border-radius: 999px;
      background: rgba(255,255,255,0.10);
      color: #EAFBF6;
      font-size: 13px;
      font-weight: 750;
      border: 1px solid rgba(255,255,255,0.12);
    }

    .download-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 18px;
    }

    .qr-box {
      aspect-ratio: 1;
      border-radius: 12px;
      background:
        linear-gradient(90deg, #111318 8px, transparent 8px) 0 0 / 24px 24px,
        linear-gradient(#111318 8px, transparent 8px) 0 0 / 24px 24px,
        #fff;
      border: 8px solid #fff;
      margin-bottom: 10px;
    }

    .qr-card p {
      color: #C8D2CF;
      font-size: 13px;
      line-height: 1.55;
      text-align: center;
    }

    .guide-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      counter-reset: step;
    }

    .step-card {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 16px;
      padding: 20px;
      box-shadow: 0 7px 20px rgba(16,24,40,0.05);
      position: relative;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .step-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
      border-color: rgba(0,200,150,0.32);
    }

    .step-card::before {
      counter-increment: step;
      content: "0" counter(step);
      display: inline-grid;
      place-items: center;
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      font-weight: 950;
      margin-bottom: 16px;
    }

    .topic-layout {
      display: grid;
      grid-template-columns: 1fr 1fr 0.82fr;
      grid-auto-rows: minmax(188px, auto);
      gap: 16px;
    }

    .topic-card {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 16px;
      padding: 22px;
      box-shadow: 0 8px 22px rgba(16,24,40,0.06);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 188px;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .topic-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.34);
    }

    .topic-card.large {
      grid-row: span 2;
      background:
        linear-gradient(135deg, rgba(0,200,150,0.12), rgba(123,92,255,0.10)),
        #fff;
    }

    .topic-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 14px;
    }

    .proof-grid {
      display: grid;
      grid-template-columns: 0.85fr 1.15fr;
      gap: 24px;
      align-items: stretch;
    }

    .proof-score {
      background: var(--color-dark);
      color: #fff;
      border-radius: 16px;
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 290px;
    }

    .score-number {
      font-size: 58px;
      line-height: 1;
      font-weight: 950;
      color: var(--color-primary);
    }

    .score-number span {
      font-size: 24px;
      color: #fff;
    }

    .proof-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }

    .proof-card {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 16px;
      padding: 20px;
      box-shadow: 0 7px 20px rgba(16,24,40,0.05);
    }

    .faq-wrap {
      display: grid;
      grid-template-columns: 0.8fr 1.2fr;
      gap: 28px;
      align-items: start;
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 6px 18px rgba(16,24,40,0.05);
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      padding: 16px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      text-align: left;
      color: var(--color-text);
      font-weight: 850;
      border-left: 4px solid transparent;
    }

    .faq-question::after {
      content: "+";
      font-size: 22px;
      color: var(--color-primary-dark);
      flex: 0 0 auto;
    }

    .faq-item.active .faq-question {
      border-left-color: var(--color-primary);
      background: rgba(0,200,150,0.06);
    }

    .faq-item.active .faq-question::after {
      content: "−";
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px 22px;
      color: var(--color-muted);
      font-size: 15px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .cta-band {
      padding: 58px 0;
      background:
        linear-gradient(90deg, rgba(0,200,150,0.16), rgba(123,92,255,0.12)),
        #fff;
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .cta-inner {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
    }

    .cta-inner h2 {
      max-width: 720px;
    }

    .cta-inner p {
      color: var(--color-muted);
      max-width: 760px;
      margin-top: 10px;
    }

    .site-footer {
      background: #111318;
      color: #D6DEDB;
      padding: 46px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr repeat(3, 1fr);
      gap: 28px;
      padding-bottom: 28px;
      border-bottom: 1px solid rgba(255,255,255,0.12);
    }

    .footer-title {
      color: #fff;
      font-size: 18px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .footer-text {
      color: #AEB8B5;
      font-size: 14px;
      line-height: 1.75;
      max-width: 420px;
    }

    .footer-links {
      list-style: none;
      display: grid;
      gap: 8px;
    }

    .footer-links a {
      color: #AEB8B5;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--color-primary);
      text-decoration: underline;
    }

    .copyright {
      padding-top: 20px;
      color: #8D9894;
      font-size: 13px;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }

    @media (max-width: 1100px) {
      .nav-menu {
        gap: 0;
      }

      .nav-menu a {
        padding: 0 9px;
        font-size: 14px;
      }

      .hero-shell,
      .download-zone,
      .news-layout,
      .proof-grid,
      .faq-wrap {
        grid-template-columns: 1fr;
      }

      .hero-panel {
        grid-template-columns: 1fr 1fr;
      }

      .quick-inner {
        grid-template-columns: repeat(3, 1fr);
      }

      .guide-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .topic-layout {
        grid-template-columns: 1fr 1fr;
      }

      .topic-card.large {
        grid-row: auto;
      }
    }

    @media (max-width: 860px) {
      .menu-toggle {
        display: inline-flex;
      }

      .nav-actions .btn {
        display: none;
      }

      .nav-menu {
        position: absolute;
        left: 20px;
        right: 20px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        background: #fff;
        border: 1px solid var(--color-border);
        border-radius: 14px;
        box-shadow: var(--shadow-md);
        padding: 10px;
      }

      .nav-menu.open {
        display: flex;
      }

      .nav-menu a {
        height: 46px;
        justify-content: flex-start;
      }

      .hero {
        padding-top: 42px;
      }

      .hero-panel {
        grid-template-columns: 1fr;
      }

      .launch-card {
        min-height: auto;
      }

      .section {
        padding: 54px 0;
      }

      .section-head {
        align-items: flex-start;
        flex-direction: column;
      }

      .download-info {
        grid-template-columns: 1fr;
      }

      .qr-card {
        max-width: 220px;
      }

      .cta-inner {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .brand-text {
        font-size: 16px;
      }

      .signal-row,
      .quick-inner,
      .guide-grid,
      .topic-layout,
      .proof-list {
        grid-template-columns: 1fr;
      }

      .hero-actions,
      .download-actions {
        flex-direction: column;
      }

      .hero-actions .btn,
      .download-actions .btn,
      .cta-inner .btn {
        width: 100%;
      }

      .quick-strip {
        margin-top: 0;
        padding-top: 16px;
        background: var(--color-dark);
      }

      .quick-inner {
        padding: 12px;
      }

      .news-visual {
        min-height: 210px;
      }

      .news-visual strong {
        font-size: 23px;
      }

      .news-item a {
        grid-template-columns: 1fr;
      }

      .date-box {
        width: 100%;
        display: flex;
        justify-content: center;
        gap: 4px;
      }

      .phone-frame {
        width: 100%;
      }

      .device-board {
        min-height: auto;
        padding: 16px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 375px) {
      .btn {
        padding: 0 14px;
        white-space: normal;
        text-align: center;
      }

      .brand-mark {
        width: 34px;
        height: 34px;
      }

      h1 {
        font-size: 28px;
      }

      .hero-lead {
        font-size: 16px;
      }

      .feature-body h3,
      .download-copy h3,
      .topic-card h3,
      .proof-card h3,
      .step-card h3 {
        font-size: 18px;
      }
    }

/* roulang page: category2 */
:root {
      --color-primary: #00C896;
      --color-primary-dark: #00A87E;
      --color-secondary: #7B5CFF;
      --color-accent: #FF8A2A;
      --color-dark: #111318;
      --color-dark-soft: #1B1F25;
      --color-text: #1F2328;
      --color-muted: #667085;
      --color-subtle: #F6F8FA;
      --color-card: #FFFFFF;
      --color-border: #E4E7EC;
      --color-line: rgba(255,255,255,0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 8px 24px rgba(16,24,40,0.08);
      --shadow-md: 0 14px 34px rgba(16,24,40,0.12);
      --container: 1200px;
      --transition: 180ms ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--color-text);
      background: var(--color-subtle);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
    }

    a:hover {
      color: var(--color-primary-dark);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    ul,
    ol {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
      background: none;
    }

    input,
    textarea {
      width: 100%;
      border: 1px solid var(--color-border);
      border-radius: 10px;
      background: #fff;
      color: var(--color-text);
      outline: none;
      transition: border-color var(--transition), box-shadow var(--transition);
    }

    input:focus,
    textarea:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 4px rgba(0, 200, 150, 0.14);
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.94);
      border-bottom: 1px solid var(--color-border);
      backdrop-filter: blur(12px);
    }

    .nav-wrap {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      color: var(--color-dark);
      white-space: nowrap;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.22);
    }

    .brand-text {
      font-size: 18px;
      letter-spacing: 0;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .nav-menu a {
      display: inline-flex;
      align-items: center;
      height: 40px;
      padding: 0 12px;
      border-radius: 10px;
      color: #424A55;
      font-size: 15px;
      font-weight: 650;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--color-dark);
      background: rgba(0, 200, 150, 0.12);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-dark);
      align-items: center;
      justify-content: center;
    }

    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after {
      display: block;
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 4px;
      position: relative;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
    }

    .menu-toggle span::before {
      top: -7px;
    }

    .menu-toggle span::after {
      top: 7px;
    }

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 18px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 750;
      border: 1px solid transparent;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #082018;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.25);
    }

    .btn-primary:hover {
      background: var(--color-primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(0, 168, 126, 0.30);
    }

    .btn-secondary {
      background: #fff;
      border-color: var(--color-border);
      color: var(--color-text);
    }

    .btn-secondary:hover {
      border-color: var(--color-primary);
      color: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    .btn-dark {
      background: rgba(255,255,255,0.08);
      border-color: rgba(255,255,255,0.22);
      color: #fff;
    }

    .btn-dark:hover {
      background: rgba(0,200,150,0.16);
      border-color: var(--color-primary);
      color: #fff;
      transform: translateY(-2px);
    }

    .section {
      padding: 72px 0;
    }

    .section-tight {
      padding: 56px 0;
    }

    .section-dark {
      background: var(--color-dark);
      color: #fff;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 750;
      background: rgba(0, 200, 150, 0.12);
      color: var(--color-primary-dark);
      border: 1px solid rgba(0, 200, 150, 0.20);
      margin-bottom: 12px;
    }

    .section-dark .section-kicker {
      color: #A8FFE5;
      border-color: rgba(0, 200, 150, 0.32);
      background: rgba(0, 200, 150, 0.13);
    }

    .section-head {
      max-width: 760px;
      margin-bottom: 28px;
    }

    .section-head h2 {
      font-size: 32px;
      line-height: 1.28;
      font-weight: 900;
      margin: 0 0 12px;
      letter-spacing: 0;
    }

    .section-head p {
      margin: 0;
      color: var(--color-muted);
      font-size: 16px;
    }

    .section-dark .section-head p {
      color: rgba(255,255,255,0.72);
    }

    .page-hero {
      position: relative;
      background:
        linear-gradient(90deg, rgba(17,19,24,0.97), rgba(17,19,24,0.90)),
        radial-gradient(circle at 18% 28%, rgba(0,200,150,0.26), transparent 34%),
        radial-gradient(circle at 82% 68%, rgba(123,92,255,0.24), transparent 30%),
        #111318;
      color: #fff;
      padding: 54px 0 46px;
      overflow: hidden;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 44px 44px;
      opacity: 0.26;
      pointer-events: none;
    }

    .download-hero {
      position: relative;
      display: grid;
      grid-template-columns: 0.88fr 1.12fr;
      gap: 34px;
      align-items: stretch;
    }

    .hero-copy {
      position: relative;
      z-index: 1;
      padding: 18px 0;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 750;
      background: rgba(0,200,150,0.13);
      border: 1px solid rgba(0,200,150,0.35);
      color: #A8FFE5;
      margin-bottom: 18px;
    }

    .hero-copy h1 {
      font-size: 42px;
      line-height: 1.22;
      letter-spacing: 0;
      font-weight: 950;
      margin: 0 0 16px;
    }

    .hero-copy p {
      max-width: 660px;
      margin: 0 0 24px;
      color: rgba(255,255,255,0.76);
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 24px;
    }

    .hero-notes {
      display: grid;
      gap: 10px;
      max-width: 620px;
    }

    .hero-note {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: rgba(255,255,255,0.78);
      font-size: 14px;
    }

    .hero-note span {
      width: 20px;
      height: 20px;
      flex: 0 0 20px;
      border-radius: 7px;
      display: grid;
      place-items: center;
      color: #111318;
      background: var(--color-primary);
      font-size: 12px;
      font-weight: 900;
      margin-top: 3px;
    }

    .download-panel {
      position: relative;
      z-index: 1;
      background: #fff;
      color: var(--color-text);
      border-radius: var(--radius-lg);
      padding: 22px;
      box-shadow: 0 20px 48px rgba(0,0,0,0.24);
      border: 1px solid rgba(255,255,255,0.12);
    }

    .panel-top {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      align-items: flex-start;
      padding-bottom: 18px;
      border-bottom: 1px solid var(--color-border);
    }

    .app-icon {
      width: 62px;
      height: 62px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      font-size: 24px;
      font-weight: 950;
      box-shadow: 0 12px 24px rgba(0, 200, 150, 0.20);
      flex: 0 0 62px;
    }

    .panel-title {
      display: flex;
      gap: 14px;
      align-items: center;
      min-width: 0;
    }

    .panel-title strong {
      display: block;
      font-size: 21px;
      line-height: 1.35;
      font-weight: 900;
    }

    .panel-title small {
      display: block;
      margin-top: 3px;
      color: var(--color-muted);
      font-size: 14px;
    }

    .status-pill {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      background: rgba(255,138,42,0.12);
      color: #A84D00;
      font-size: 13px;
      font-weight: 800;
      white-space: nowrap;
    }

    .version-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin: 18px 0;
    }

    .version-item {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 13px;
      background: var(--color-subtle);
    }

    .version-item span {
      display: block;
      color: var(--color-muted);
      font-size: 13px;
      margin-bottom: 3px;
    }

    .version-item strong {
      display: block;
      font-size: 15px;
      font-weight: 850;
      color: var(--color-text);
    }

    .download-body {
      display: grid;
      grid-template-columns: 1fr 168px;
      gap: 18px;
      align-items: stretch;
    }

    .system-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 16px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 0 10px;
      border-radius: 999px;
      background: rgba(123,92,255,0.10);
      color: #4A34B5;
      font-size: 13px;
      font-weight: 750;
      border: 1px solid rgba(123,92,255,0.16);
    }

    .tag.green {
      background: rgba(0,200,150,0.12);
      color: #087A60;
      border-color: rgba(0,200,150,0.22);
    }

    .tag.orange {
      background: rgba(255,138,42,0.13);
      color: #9A4C0B;
      border-color: rgba(255,138,42,0.20);
    }

    .download-list {
      display: grid;
      gap: 10px;
      margin-bottom: 18px;
    }

    .download-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #4C5562;
      font-size: 14px;
    }

    .download-list li::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--color-primary);
      margin-top: 10px;
      flex: 0 0 7px;
    }

    .panel-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .qr-card {
      min-height: 178px;
      border-radius: var(--radius-md);
      border: 1px dashed rgba(0,200,150,0.45);
      background:
        linear-gradient(45deg, rgba(0,200,150,0.08) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(123,92,255,0.06) 25%, transparent 25%),
        #F9FAFB;
      background-size: 18px 18px;
      display: grid;
      place-items: center;
      text-align: center;
      padding: 14px;
    }

    .qr-box {
      width: 104px;
      height: 104px;
      border-radius: 12px;
      background:
        linear-gradient(90deg, var(--color-dark) 10px, transparent 10px) 0 0 / 26px 26px,
        linear-gradient(var(--color-dark) 10px, transparent 10px) 0 0 / 26px 26px,
        #fff;
      border: 8px solid #fff;
      box-shadow: var(--shadow-sm);
      margin: 0 auto 10px;
    }

    .qr-card span {
      display: block;
      color: var(--color-muted);
      font-size: 13px;
      line-height: 1.5;
    }

    .quick-strip {
      position: relative;
      z-index: 2;
      margin-top: -24px;
    }

    .quick-inner {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .quick-card {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 16px;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .quick-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.36);
    }

    .quick-card strong {
      display: block;
      margin-bottom: 4px;
      font-size: 16px;
      font-weight: 900;
    }

    .quick-card span {
      display: block;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.55;
    }

    .steps-layout {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 26px;
      align-items: start;
    }

    .device-card {
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      padding: 20px;
      overflow: hidden;
    }

    .phone-shell {
      border-radius: 24px;
      border: 10px solid var(--color-dark);
      background: var(--color-dark-soft);
      padding: 18px;
      max-width: 330px;
      margin: 0 auto;
      box-shadow: 0 18px 34px rgba(16,24,40,0.15);
    }

    .phone-top {
      height: 22px;
      width: 92px;
      border-radius: 999px;
      background: #0A0B0D;
      margin: 0 auto 16px;
    }

    .screen-card {
      background: #fff;
      border-radius: 16px;
      padding: 16px;
      min-height: 390px;
    }

    .screen-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
    }

    .screen-logo {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 900;
    }

    .screen-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--color-primary);
      box-shadow: 16px 0 0 var(--color-secondary), 32px 0 0 var(--color-accent);
    }

    .progress-card {
      border-radius: var(--radius-md);
      background: var(--color-subtle);
      padding: 14px;
      margin-bottom: 12px;
    }

    .progress-card strong {
      display: block;
      margin-bottom: 8px;
      font-size: 15px;
    }

    .progress-line {
      height: 9px;
      border-radius: 999px;
      background: #E9EDF2;
      overflow: hidden;
    }

    .progress-line span {
      display: block;
      width: 72%;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    }

    .screen-list {
      display: grid;
      gap: 10px;
      margin-top: 16px;
    }

    .screen-list li {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      border-bottom: 1px solid #EEF1F4;
      padding-bottom: 10px;
      font-size: 13px;
      color: var(--color-muted);
    }

    .screen-list strong {
      color: var(--color-text);
    }

    .step-list {
      display: grid;
      gap: 14px;
    }

    .step-item {
      display: grid;
      grid-template-columns: 48px 1fr;
      gap: 14px;
      align-items: start;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 18px;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .step-item:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.35);
    }

    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: rgba(0,200,150,0.12);
      color: #087A60;
      font-weight: 950;
    }

    .step-item h3 {
      margin: 0 0 5px;
      font-size: 19px;
      line-height: 1.35;
      font-weight: 900;
    }

    .step-item p {
      margin: 0;
      color: var(--color-muted);
      font-size: 15px;
    }

    .update-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 22px;
      align-items: start;
    }

    .update-card,
    .compat-card,
    .tip-card {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      padding: 20px;
    }

    .update-main {
      display: grid;
      gap: 14px;
    }

    .update-row {
      display: grid;
      grid-template-columns: 112px 1fr;
      gap: 16px;
      padding: 15px 0;
      border-bottom: 1px solid var(--color-border);
    }

    .update-row:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .update-date {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 32px;
      border-radius: 999px;
      background: rgba(123,92,255,0.10);
      color: #4A34B5;
      font-size: 13px;
      font-weight: 850;
    }

    .update-row h3 {
      margin: 0 0 5px;
      font-size: 18px;
      line-height: 1.35;
      font-weight: 900;
    }

    .update-row p {
      margin: 0;
      color: var(--color-muted);
      font-size: 15px;
    }

    .compat-list {
      display: grid;
      gap: 12px;
    }

    .compat-list li {
      padding: 13px;
      border-radius: var(--radius-sm);
      background: var(--color-subtle);
      display: flex;
      justify-content: space-between;
      gap: 14px;
      align-items: center;
      color: var(--color-muted);
      font-size: 14px;
    }

    .compat-list strong {
      color: var(--color-text);
      font-size: 15px;
    }

    .scenario-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr 0.9fr;
      gap: 18px;
    }

    .scenario-card {
      position: relative;
      min-height: 250px;
      overflow: hidden;
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-border);
      background: #fff;
      box-shadow: var(--shadow-sm);
      padding: 22px;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .scenario-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.34);
    }

    .scenario-card.featured {
      background:
        linear-gradient(145deg, rgba(0,200,150,0.13), rgba(123,92,255,0.10)),
        #fff;
    }

    .scenario-icon {
      width: 46px;
      height: 46px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: var(--color-dark);
      color: #fff;
      font-weight: 950;
      margin-bottom: 18px;
    }

    .scenario-card h3 {
      margin: 0 0 9px;
      font-size: 21px;
      line-height: 1.35;
      font-weight: 900;
    }

    .scenario-card p {
      margin: 0 0 18px;
      color: var(--color-muted);
      font-size: 15px;
    }

    .scenario-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
    }

    .tips-band {
      background: #fff;
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .tips-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }

    .tip-card h3 {
      margin: 0 0 9px;
      font-size: 19px;
      font-weight: 900;
    }

    .tip-card p {
      margin: 0;
      color: var(--color-muted);
      font-size: 15px;
    }

    .faq-wrap {
      display: grid;
      grid-template-columns: 0.74fr 1.26fr;
      gap: 28px;
      align-items: start;
    }

    .faq-intro {
      position: sticky;
      top: 96px;
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      padding: 16px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      color: var(--color-text);
      font-weight: 850;
      text-align: left;
    }

    .faq-question::after {
      content: "+";
      width: 28px;
      height: 28px;
      flex: 0 0 28px;
      border-radius: 8px;
      display: grid;
      place-items: center;
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      font-weight: 900;
      transition: transform var(--transition), background var(--transition);
    }

    .faq-item.active .faq-question::after {
      content: "−";
      background: var(--color-primary);
      color: #082018;
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--color-muted);
      font-size: 15px;
      border-left: 3px solid var(--color-primary);
      margin-left: 18px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .download-cta {
      border-radius: var(--radius-lg);
      background:
        linear-gradient(90deg, rgba(17,19,24,0.97), rgba(17,19,24,0.92)),
        radial-gradient(circle at 88% 30%, rgba(0,200,150,0.26), transparent 28%),
        #111318;
      color: #fff;
      padding: 30px;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.12);
    }

    .download-cta h2 {
      font-size: 30px;
      line-height: 1.3;
      font-weight: 950;
      margin: 0 0 8px;
    }

    .download-cta p {
      margin: 0;
      color: rgba(255,255,255,0.74);
      max-width: 720px;
    }

    .cta-actions {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .site-footer {
      background: var(--color-dark);
      color: rgba(255,255,255,0.76);
      padding: 54px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.75fr 0.75fr 0.85fr;
      gap: 28px;
      padding-bottom: 30px;
      border-bottom: 1px solid var(--color-line);
    }

    .footer-title {
      color: #fff;
      font-size: 17px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .footer-text {
      margin: 0;
      color: rgba(255,255,255,0.66);
      font-size: 14px;
      line-height: 1.8;
    }

    .footer-links {
      display: grid;
      gap: 8px;
    }

    .footer-links a {
      color: rgba(255,255,255,0.68);
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--color-primary);
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .copyright {
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      color: rgba(255,255,255,0.55);
      font-size: 13px;
    }

    @media (max-width: 1100px) {
      .nav-wrap {
        gap: 14px;
      }

      .nav-menu a {
        padding: 0 9px;
        font-size: 14px;
      }

      .download-hero,
      .steps-layout,
      .update-grid,
      .faq-wrap {
        grid-template-columns: 1fr;
      }

      .faq-intro {
        position: static;
      }

      .scenario-grid {
        grid-template-columns: 1fr 1fr;
      }

      .scenario-card.featured {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 900px) {
      .menu-toggle {
        display: inline-flex;
      }

      .site-header nav {
        order: 3;
      }

      .nav-wrap {
        flex-wrap: wrap;
        min-height: 66px;
        padding: 10px 0;
      }

      .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 10px 0 4px;
      }

      .nav-menu.open {
        display: flex;
      }

      .nav-menu a {
        height: 44px;
        justify-content: center;
      }

      .nav-actions {
        margin-left: auto;
      }

      .quick-inner,
      .tips-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 767px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .section {
        padding: 48px 0;
      }

      .section-tight {
        padding: 40px 0;
      }

      .page-hero {
        padding: 42px 0 34px;
      }

      .hero-copy h1 {
        font-size: 31px;
      }

      .hero-copy p {
        font-size: 16px;
      }

      .section-head h2,
      .download-cta h2 {
        font-size: 25px;
      }

      .panel-top,
      .download-body,
      .version-grid,
      .update-row,
      .download-cta {
        grid-template-columns: 1fr;
      }

      .panel-top {
        display: grid;
      }

      .status-pill {
        width: fit-content;
      }

      .panel-actions .btn,
      .hero-actions .btn,
      .cta-actions .btn {
        width: 100%;
      }

      .scenario-grid,
      .quick-inner,
      .tips-grid {
        grid-template-columns: 1fr;
      }

      .download-cta {
        padding: 24px;
      }

      .cta-actions {
        justify-content: stretch;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .copyright {
        flex-direction: column;
      }
    }

    @media (max-width: 520px) {
      .brand-text {
        font-size: 16px;
      }

      .brand-mark {
        width: 34px;
        height: 34px;
        font-size: 16px;
      }

      .nav-actions {
        width: 100%;
      }

      .nav-actions .btn {
        width: 100%;
      }

      .download-panel {
        padding: 16px;
      }

      .panel-title {
        align-items: flex-start;
      }

      .app-icon {
        width: 54px;
        height: 54px;
        flex-basis: 54px;
      }

      .phone-shell {
        border-width: 8px;
        padding: 12px;
      }

      .screen-card {
        min-height: 330px;
        padding: 14px;
      }

      .step-item {
        grid-template-columns: 1fr;
      }

      .step-num {
        width: 42px;
        height: 42px;
      }

      .faq-question {
        align-items: flex-start;
      }
    }

/* roulang page: category1 */
:root {
      --color-primary: #00C896;
      --color-primary-dark: #00A87E;
      --color-secondary: #7B5CFF;
      --color-accent: #FF8A2A;
      --color-dark: #111318;
      --color-dark-soft: #1B1F25;
      --color-text: #1F2328;
      --color-muted: #667085;
      --color-subtle: #F6F8FA;
      --color-card: #FFFFFF;
      --color-border: #E4E7EC;
      --color-line: rgba(255,255,255,0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 8px 24px rgba(16,24,40,0.08);
      --shadow-md: 0 14px 34px rgba(16,24,40,0.12);
      --container: 1200px;
      --transition: 180ms ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--color-text);
      background: var(--color-subtle);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
    }

    a:hover {
      color: var(--color-primary-dark);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
      background: none;
    }

    ul,
    ol {
      margin: 0;
      padding: 0;
    }

    p {
      margin: 0;
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.94);
      border-bottom: 1px solid var(--color-border);
      backdrop-filter: blur(12px);
    }

    .nav-wrap {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      color: var(--color-dark);
      white-space: nowrap;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.22);
    }

    .brand-text {
      font-size: 18px;
      letter-spacing: 0;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 4px;
      list-style: none;
    }

    .nav-menu a {
      display: inline-flex;
      align-items: center;
      height: 40px;
      padding: 0 12px;
      border-radius: 10px;
      color: #424A55;
      font-size: 15px;
      font-weight: 650;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--color-dark);
      background: rgba(0, 200, 150, 0.12);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-dark);
      align-items: center;
      justify-content: center;
    }

    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after {
      display: block;
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 4px;
      position: relative;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
    }

    .menu-toggle span::before {
      top: -7px;
    }

    .menu-toggle span::after {
      top: 7px;
    }

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 18px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 750;
      border: 1px solid transparent;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #082018;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.25);
    }

    .btn-primary:hover {
      background: var(--color-primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(0, 168, 126, 0.30);
    }

    .btn-secondary {
      background: #fff;
      border-color: var(--color-border);
      color: var(--color-text);
    }

    .btn-secondary:hover {
      border-color: var(--color-primary);
      color: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    .btn-dark {
      background: rgba(255,255,255,0.08);
      border-color: rgba(255,255,255,0.22);
      color: #fff;
    }

    .btn-dark:hover {
      background: rgba(0,200,150,0.16);
      border-color: var(--color-primary);
      color: #fff;
      transform: translateY(-2px);
    }

    .section {
      padding: 72px 0;
    }

    .section-tight {
      padding: 56px 0;
    }

    .section-dark {
      background: var(--color-dark);
      color: #fff;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 750;
      color: var(--color-primary-dark);
      background: rgba(0,200,150,0.12);
      border: 1px solid rgba(0,200,150,0.20);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: clamp(24px, 3vw, 34px);
      line-height: 1.25;
      margin: 0;
      font-weight: 900;
      color: var(--color-dark);
      letter-spacing: 0;
    }

    .section-dark .section-title,
    .section-dark .section-desc {
      color: #fff;
    }

    .section-desc {
      color: var(--color-muted);
      max-width: 680px;
      font-size: 16px;
      margin-top: 10px;
    }

    .category-hero {
      position: relative;
      overflow: hidden;
      color: #fff;
      background:
        linear-gradient(90deg, rgba(17,19,24,0.97), rgba(17,19,24,0.88)),
        radial-gradient(circle at 78% 24%, rgba(0,200,150,0.28), transparent 30%),
        radial-gradient(circle at 88% 78%, rgba(123,92,255,0.20), transparent 32%),
        #111318;
      padding: 54px 0 44px;
    }

    .category-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 46px 46px;
      opacity: 0.22;
      pointer-events: none;
    }

    .category-hero-shell {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 390px;
      gap: 34px;
      align-items: center;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 750;
      background: rgba(0,200,150,0.13);
      border: 1px solid rgba(0,200,150,0.35);
      color: #A8FFE5;
      margin-bottom: 16px;
    }

    .category-hero h1 {
      font-size: clamp(30px, 4vw, 44px);
      line-height: 1.2;
      margin: 0 0 16px;
      font-weight: 950;
      letter-spacing: 0;
      max-width: 760px;
    }

    .hero-lead {
      color: rgba(255,255,255,0.76);
      font-size: 17px;
      max-width: 720px;
      margin-bottom: 24px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 26px;
    }

    .signal-row {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      max-width: 740px;
    }

    .signal-item {
      border: 1px solid rgba(255,255,255,0.14);
      background: rgba(255,255,255,0.06);
      border-radius: var(--radius-md);
      padding: 13px 14px;
    }

    .signal-label {
      display: block;
      color: rgba(255,255,255,0.58);
      font-size: 13px;
      margin-bottom: 4px;
    }

    .signal-value {
      display: block;
      font-size: 15px;
      font-weight: 850;
      color: #fff;
    }

    .update-console {
      border: 1px solid rgba(255,255,255,0.16);
      background: #171B21;
      border-radius: var(--radius-lg);
      box-shadow: 0 24px 50px rgba(0,0,0,0.22);
      overflow: hidden;
    }

    .console-top {
      height: 46px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
      border-bottom: 1px solid rgba(255,255,255,0.10);
    }

    .console-dots {
      display: flex;
      gap: 7px;
    }

    .console-dots span {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--color-primary);
    }

    .console-dots span:nth-child(2) {
      background: var(--color-accent);
    }

    .console-dots span:nth-child(3) {
      background: var(--color-secondary);
    }

    .console-status {
      color: rgba(255,255,255,0.68);
      font-size: 13px;
    }

    .console-body {
      padding: 18px;
    }

    .ticker-card {
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--radius-md);
      padding: 14px;
      background: rgba(255,255,255,0.045);
      margin-bottom: 12px;
    }

    .ticker-card:last-child {
      margin-bottom: 0;
    }

    .ticker-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      color: rgba(255,255,255,0.56);
      font-size: 13px;
      margin-bottom: 6px;
    }

    .ticker-title {
      color: #fff;
      font-weight: 850;
      line-height: 1.45;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      min-height: 24px;
      padding: 0 9px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0;
    }

    .badge-primary {
      background: rgba(0,200,150,0.13);
      color: var(--color-primary-dark);
      border: 1px solid rgba(0,200,150,0.22);
    }

    .badge-purple {
      background: rgba(123,92,255,0.12);
      color: #6046DE;
      border: 1px solid rgba(123,92,255,0.18);
    }

    .badge-orange {
      background: rgba(255,138,42,0.13);
      color: #B85C05;
      border: 1px solid rgba(255,138,42,0.20);
    }

    .quick-strip {
      margin-top: -22px;
      position: relative;
      z-index: 2;
    }

    .quick-grid {
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      gap: 14px;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      padding: 14px;
    }

    .quick-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      min-height: 58px;
      padding: 0 14px;
      border-radius: var(--radius-md);
      background: var(--color-subtle);
      color: var(--color-text);
      font-weight: 800;
    }

    .quick-link span {
      color: var(--color-primary-dark);
      font-size: 18px;
    }

    .quick-link:hover {
      background: rgba(0,200,150,0.12);
      transform: translateY(-2px);
    }

    .feature-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) 360px;
      gap: 24px;
      align-items: start;
    }

    .lead-card {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .lead-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .visual-block {
      position: relative;
      min-height: 260px;
      background:
        linear-gradient(135deg, rgba(0,200,150,0.20), rgba(123,92,255,0.18)),
        #191D23;
      display: grid;
      place-items: center;
      overflow: hidden;
    }

    .visual-block::before {
      content: "";
      position: absolute;
      inset: 18px;
      border: 1px solid rgba(255,255,255,0.16);
      border-radius: var(--radius-md);
    }

    .visual-screen {
      position: relative;
      width: min(82%, 520px);
      border-radius: var(--radius-md);
      background: rgba(17,19,24,0.86);
      border: 1px solid rgba(255,255,255,0.18);
      padding: 18px;
      color: #fff;
    }

    .screen-line {
      height: 10px;
      border-radius: 999px;
      background: rgba(255,255,255,0.16);
      margin-bottom: 12px;
    }

    .screen-line:nth-child(2) {
      width: 72%;
      background: rgba(0,200,150,0.48);
    }

    .screen-line:nth-child(3) {
      width: 58%;
      background: rgba(123,92,255,0.44);
    }

    .screen-line:nth-child(4) {
      width: 86%;
      background: rgba(255,138,42,0.44);
      margin-bottom: 0;
    }

    .lead-content {
      padding: 24px;
    }

    .meta-row {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 14px;
    }

    .lead-card h2,
    .side-panel h2,
    .download-widget h2 {
      margin: 0;
      font-size: 24px;
      line-height: 1.32;
      font-weight: 900;
      letter-spacing: 0;
    }

    .lead-card p {
      color: var(--color-muted);
      margin-top: 10px;
    }

    .news-list {
      display: grid;
      gap: 14px;
    }

    .news-item {
      display: grid;
      grid-template-columns: 112px minmax(0, 1fr);
      gap: 14px;
      padding: 14px;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      box-shadow: 0 5px 16px rgba(16,24,40,0.04);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .news-item:hover {
      transform: translateY(-2px);
      border-color: rgba(0,200,150,0.42);
      box-shadow: var(--shadow-sm);
    }

    .date-box {
      min-height: 96px;
      border-radius: var(--radius-sm);
      background: var(--color-dark);
      color: #fff;
      display: grid;
      place-items: center;
      text-align: center;
      padding: 10px;
    }

    .date-box strong {
      display: block;
      font-size: 26px;
      line-height: 1;
      color: var(--color-primary);
    }

    .date-box span {
      display: block;
      font-size: 13px;
      margin-top: 6px;
      color: rgba(255,255,255,0.66);
    }

    .news-copy h3 {
      margin: 6px 0 6px;
      font-size: 18px;
      line-height: 1.45;
      font-weight: 900;
      letter-spacing: 0;
    }

    .news-copy p {
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .side-stack {
      display: grid;
      gap: 16px;
    }

    .side-panel,
    .download-widget,
    .info-card,
    .faq-item,
    .cta-box {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .side-panel {
      padding: 22px;
    }

    .ranking-list {
      display: grid;
      gap: 12px;
      margin-top: 16px;
      list-style: none;
    }

    .ranking-list li {
      display: grid;
      grid-template-columns: 28px minmax(0, 1fr);
      gap: 10px;
      align-items: start;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--color-border);
    }

    .ranking-list li:last-child {
      padding-bottom: 0;
      border-bottom: 0;
    }

    .rank-num {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 8px;
      background: rgba(0,200,150,0.14);
      color: var(--color-primary-dark);
      font-weight: 900;
      font-size: 13px;
    }

    .ranking-list a {
      font-weight: 820;
      line-height: 1.45;
    }

    .ranking-list p {
      color: var(--color-muted);
      font-size: 13px;
      line-height: 1.55;
      margin-top: 4px;
    }

    .download-widget {
      padding: 22px;
      background:
        linear-gradient(180deg, rgba(0,200,150,0.10), rgba(255,255,255,0) 46%),
        #fff;
    }

    .download-status {
      display: grid;
      gap: 10px;
      margin: 16px 0;
    }

    .status-line {
      display: flex;
      justify-content: space-between;
      gap: 14px;
      padding: 10px 0;
      border-bottom: 1px solid var(--color-border);
      font-size: 14px;
    }

    .status-line span:first-child {
      color: var(--color-muted);
    }

    .status-line span:last-child {
      font-weight: 850;
    }

    .widget-actions {
      display: grid;
      gap: 10px;
    }

    .timeline-wrap {
      position: relative;
      display: grid;
      gap: 18px;
    }

    .timeline-item {
      display: grid;
      grid-template-columns: 160px minmax(0, 1fr);
      gap: 20px;
      align-items: start;
    }

    .timeline-time {
      position: sticky;
      top: 92px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: #fff;
      padding: 14px;
      font-weight: 900;
      box-shadow: 0 4px 14px rgba(16,24,40,0.04);
    }

    .timeline-card {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      background: #fff;
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .timeline-card:hover {
      transform: translateY(-2px);
      border-color: rgba(0,200,150,0.42);
      box-shadow: var(--shadow-md);
    }

    .timeline-card h3 {
      margin: 10px 0 8px;
      font-size: 20px;
      line-height: 1.38;
      font-weight: 900;
      letter-spacing: 0;
    }

    .timeline-card p {
      color: var(--color-muted);
    }

    .topic-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 18px;
    }

    .topic-card {
      position: relative;
      min-height: 210px;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255,255,255,0.14);
      background: rgba(255,255,255,0.06);
      overflow: hidden;
      transition: transform var(--transition), border-color var(--transition), background var(--transition);
    }

    .topic-card:hover {
      transform: translateY(-3px);
      border-color: rgba(0,200,150,0.46);
      background: rgba(255,255,255,0.09);
    }

    .topic-card h3 {
      position: relative;
      margin: 12px 0 10px;
      font-size: 22px;
      line-height: 1.35;
      font-weight: 900;
      letter-spacing: 0;
      color: #fff;
    }

    .topic-card p {
      position: relative;
      color: rgba(255,255,255,0.70);
    }

    .topic-card.large {
      min-height: 438px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      background:
        linear-gradient(180deg, rgba(17,19,24,0.20), rgba(17,19,24,0.94)),
        linear-gradient(135deg, rgba(0,200,150,0.26), rgba(123,92,255,0.26)),
        #171B21;
    }

    .topic-side {
      display: grid;
      gap: 18px;
    }

    .info-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .info-card {
      padding: 22px;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .info-card:hover {
      transform: translateY(-2px);
      border-color: rgba(0,200,150,0.42);
      box-shadow: var(--shadow-md);
    }

    .info-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      display: grid;
      place-items: center;
      background: rgba(0,200,150,0.13);
      color: var(--color-primary-dark);
      font-weight: 950;
      margin-bottom: 14px;
    }

    .info-card:nth-child(2) .info-icon {
      background: rgba(123,92,255,0.12);
      color: #6046DE;
    }

    .info-card:nth-child(3) .info-icon {
      background: rgba(255,138,42,0.14);
      color: #B85C05;
    }

    .info-card h3 {
      font-size: 19px;
      line-height: 1.38;
      margin: 0 0 8px;
      font-weight: 900;
      letter-spacing: 0;
    }

    .info-card p {
      color: var(--color-muted);
      font-size: 15px;
    }

    .faq-list {
      display: grid;
      gap: 14px;
    }

    .faq-item {
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 0 20px;
      color: var(--color-text);
      font-weight: 850;
      text-align: left;
    }

    .faq-question::after {
      content: "+";
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      font-weight: 900;
    }

    .faq-item.active .faq-question::after {
      content: "−";
      background: var(--color-primary);
      color: #082018;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      color: var(--color-muted);
      border-top: 1px solid var(--color-border);
    }

    .faq-item.active {
      border-color: rgba(0,200,150,0.42);
    }

    .faq-item.active .faq-answer {
      display: block;
      padding-top: 14px;
    }

    .cta-box {
      padding: 34px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: center;
      background:
        linear-gradient(135deg, rgba(0,200,150,0.13), rgba(123,92,255,0.10)),
        #fff;
    }

    .cta-box h2 {
      margin: 0 0 8px;
      font-size: 28px;
      line-height: 1.25;
      font-weight: 950;
      letter-spacing: 0;
    }

    .cta-box p {
      color: var(--color-muted);
      max-width: 720px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: flex-end;
    }

    .site-footer {
      background: var(--color-dark);
      color: rgba(255,255,255,0.72);
      padding: 54px 0 26px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.35fr 0.8fr 0.8fr 0.9fr;
      gap: 30px;
      padding-bottom: 30px;
      border-bottom: 1px solid rgba(255,255,255,0.12);
    }

    .footer-title {
      color: #fff;
      font-size: 17px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .footer-text {
      color: rgba(255,255,255,0.64);
      max-width: 380px;
      line-height: 1.75;
    }

    .footer-links {
      list-style: none;
      display: grid;
      gap: 8px;
    }

    .footer-links a {
      color: rgba(255,255,255,0.68);
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--color-primary);
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      padding-top: 20px;
      color: rgba(255,255,255,0.50);
      font-size: 13px;
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
      outline: 3px solid rgba(0,200,150,0.35);
      outline-offset: 3px;
    }

    @media (max-width: 1100px) {
      .nav-wrap {
        gap: 14px;
      }

      .nav-menu a {
        padding: 0 9px;
        font-size: 14px;
      }

      .category-hero-shell,
      .feature-layout {
        grid-template-columns: 1fr;
      }

      .update-console {
        max-width: 720px;
      }

      .quick-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .info-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 768px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .nav-wrap {
        min-height: 66px;
      }

      .menu-toggle {
        display: inline-flex;
      }

      .site-header nav {
        order: 3;
      }

      .nav-menu {
        position: absolute;
        left: 14px;
        right: 14px;
        top: 66px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 12px;
        background: #fff;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
      }

      .nav-menu.open {
        display: flex;
      }

      .nav-menu a {
        height: 46px;
        justify-content: flex-start;
        padding: 0 14px;
      }

      .nav-actions {
        display: none;
      }

      .brand-text {
        font-size: 16px;
      }

      .category-hero {
        padding: 40px 0 34px;
      }

      .hero-lead {
        font-size: 16px;
      }

      .hero-actions,
      .cta-actions {
        flex-direction: column;
        align-items: stretch;
      }

      .hero-actions .btn,
      .cta-actions .btn,
      .widget-actions .btn {
        width: 100%;
      }

      .signal-row,
      .quick-grid,
      .info-grid,
      .topic-grid {
        grid-template-columns: 1fr;
      }

      .section {
        padding: 52px 0;
      }

      .section-tight {
        padding: 42px 0;
      }

      .section-head {
        display: block;
      }

      .news-item {
        grid-template-columns: 1fr;
      }

      .date-box {
        min-height: auto;
        display: flex;
        justify-content: space-between;
        text-align: left;
      }

      .date-box strong {
        font-size: 22px;
      }

      .timeline-item {
        grid-template-columns: 1fr;
      }

      .timeline-time {
        position: static;
      }

      .topic-card.large {
        min-height: 260px;
      }

      .cta-box {
        grid-template-columns: 1fr;
        padding: 24px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .copyright {
        flex-direction: column;
      }
    }

    @media (max-width: 420px) {
      .container {
        width: min(100% - 22px, var(--container));
      }

      .brand-mark {
        width: 34px;
        height: 34px;
      }

      .brand-text {
        max-width: 190px;
        white-space: normal;
        line-height: 1.2;
      }

      .category-hero h1 {
        font-size: 28px;
      }

      .lead-content,
      .side-panel,
      .download-widget,
      .timeline-card,
      .topic-card,
      .info-card {
        padding: 18px;
      }

      .quick-link {
        min-height: 52px;
      }

      .faq-question {
        padding: 0 16px;
      }

      .faq-answer {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

/* roulang page: category3 */
:root {
 --color-primary: #00C896;
 --color-primary-dark: #00A87E;
 --color-secondary: #7B5CFF;
 --color-accent: #FF8A2A;
 --color-dark: #111318;
 --color-dark-soft: #1B1F25;
 --color-text: #1F2328;
 --color-muted: #667085;
 --color-subtle: #F6F8FA;
 --color-card: #FFFFFF;
 --color-border: #E4E7EC;
 --color-line: rgba(255,255,255,0.14);
 --radius-sm: 8px;
 --radius-md: 12px;
 --radius-lg: 16px;
 --shadow-sm: 0 8px 24px rgba(16,24,40,0.08);
 --shadow-md: 0 14px 34px rgba(16,24,40,0.12);
 --container: 1200px;
 --transition: 180ms ease;
}
*,
*::before,
*::after {
 box-sizing: border-box;
}
html {
 scroll-behavior: smooth;
 -webkit-text-size-adjust: 100%;
}
body {
 margin: 0;
 font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
 color: var(--color-text);
 background: var(--color-subtle);
 line-height: 1.75;
 font-size: 16px;
 overflow-x: hidden;
}
a {
 color: inherit;
 text-decoration: none;
 transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}
a:hover {
 color: var(--color-primary-dark);
}
img {
 display: block;
 max-width: 100%;
 height: auto;
}
button,
input,
textarea {
 font: inherit;
}
button {
 cursor: pointer;
 border: 0;
 background: none;
}
ul,
ol {
 margin: 0;
 padding: 0;
}
p,
h1,
h2,
h3 {
 margin: 0;
}
.container {
 width: min(100% - 40px, var(--container));
 margin: 0 auto;
}
.site-header {
 position: sticky;
 top: 0;
 z-index: 50;
 background: rgba(255,255,255,0.94);
 border-bottom: 1px solid var(--color-border);
 backdrop-filter: blur(12px);
}
.nav-wrap {
 min-height: 72px;
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 24px;
}
.brand {
 display: inline-flex;
 align-items: center;
 gap: 12px;
 font-weight: 900;
 color: var(--color-dark);
 white-space: nowrap;
}
.brand-mark {
 width: 38px;
 height: 38px;
 border-radius: 10px;
 background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
 color: #fff;
 display: grid;
 place-items: center;
 font-size: 18px;
 box-shadow: 0 10px 22px rgba(0, 200, 150, 0.22);
}
.brand-text {
 font-size: 18px;
 letter-spacing: 0;
}
.nav-menu {
 display: flex;
 align-items: center;
 gap: 4px;
 list-style: none;
}
.nav-menu a {
 display: inline-flex;
 align-items: center;
 height: 40px;
 padding: 0 12px;
 border-radius: 10px;
 color: #424A55;
 font-size: 15px;
 font-weight: 650;
}
.nav-menu a:hover,
.nav-menu a.active {
 color: var(--color-dark);
 background: rgba(0, 200, 150, 0.12);
}
.nav-actions {
 display: flex;
 align-items: center;
 gap: 10px;
}
.menu-toggle {
 display: none;
 width: 44px;
 height: 44px;
 border-radius: 10px;
 border: 1px solid var(--color-border);
 background: #fff;
 color: var(--color-dark);
 align-items: center;
 justify-content: center;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
 display: block;
 width: 20px;
 height: 2px;
 background: currentColor;
 border-radius: 4px;
 position: relative;
}
.menu-toggle span::before,
.menu-toggle span::after {
 content: "";
 position: absolute;
 left: 0;
}
.menu-toggle span::before {
 top: -7px;
}
.menu-toggle span::after {
 top: 7px;
}
.btn {
 min-height: 44px;
 display: inline-flex;
 align-items: center;
 justify-content: center;
 gap: 8px;
 padding: 0 18px;
 border-radius: 10px;
 font-size: 15px;
 font-weight: 750;
 border: 1px solid transparent;
 transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
 white-space: nowrap;
}
.btn-primary {
 background: var(--color-primary);
 color: #082018;
 box-shadow: 0 10px 22px rgba(0, 200, 150, 0.25);
}
.btn-primary:hover {
 background: var(--color-primary-dark);
 color: #fff;
 transform: translateY(-2px);
 box-shadow: 0 14px 30px rgba(0, 168, 126, 0.30);
}
.btn-secondary {
 background: #fff;
 border-color: var(--color-border);
 color: var(--color-text);
}
.btn-secondary:hover {
 border-color: var(--color-primary);
 color: var(--color-primary-dark);
 transform: translateY(-2px);
 box-shadow: var(--shadow-sm);
}
.btn-dark {
 background: rgba(255,255,255,0.08);
 border-color: rgba(255,255,255,0.22);
 color: #fff;
}
.btn-dark:hover {
 background: rgba(0,200,150,0.16);
 border-color: var(--color-primary);
 color: #fff;
 transform: translateY(-2px);
}
.btn:focus-visible,
.nav-menu a:focus-visible,
.footer-links a:focus-visible,
.faq-trigger:focus-visible,
.entry-search input:focus-visible {
 outline: 3px solid rgba(0,200,150,0.28);
 outline-offset: 3px;
}
.page-hero {
 position: relative;
 color: #fff;
 background:
  linear-gradient(90deg, rgba(17,19,24,0.97), rgba(17,19,24,0.88)),
  radial-gradient(circle at 18% 25%, rgba(0,200,150,0.24), transparent 28%),
  radial-gradient(circle at 78% 40%, rgba(123,92,255,0.22), transparent 31%),
  #111318;
 padding: 54px 0 46px;
 overflow: hidden;
}
.page-hero::before {
 content: "";
 position: absolute;
 inset: 0;
 background-image:
  linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
  linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
 background-size: 46px 46px;
 opacity: 0.22;
 pointer-events: none;
}
.entry-hero-grid {
 position: relative;
 display: grid;
 grid-template-columns: 0.9fr 1.1fr;
 gap: 34px;
 align-items: center;
}
.hero-kicker,
.section-kicker {
 display: inline-flex;
 align-items: center;
 gap: 8px;
 min-height: 28px;
 padding: 0 10px;
 border-radius: 999px;
 font-size: 13px;
 font-weight: 750;
}
.hero-kicker {
 background: rgba(0,200,150,0.13);
 border: 1px solid rgba(0,200,150,0.35);
 color: #A8FFE5;
 margin-bottom: 18px;
}
.page-hero h1 {
 max-width: 760px;
 font-size: clamp(30px, 4vw, 44px);
 line-height: 1.22;
 font-weight: 900;
 letter-spacing: 0;
}
.hero-desc {
 max-width: 690px;
 margin-top: 16px;
 color: #D8DEE8;
 font-size: 17px;
 line-height: 1.78;
}
.hero-actions {
 display: flex;
 gap: 12px;
 flex-wrap: wrap;
 margin-top: 24px;
}
.browser-card {
 border: 1px solid rgba(255,255,255,0.18);
 background: rgba(255,255,255,0.06);
 border-radius: var(--radius-lg);
 overflow: hidden;
 box-shadow: 0 18px 44px rgba(0,0,0,0.24);
}
.browser-top {
 min-height: 48px;
 display: flex;
 align-items: center;
 gap: 8px;
 padding: 0 16px;
 border-bottom: 1px solid rgba(255,255,255,0.12);
}
.dot {
 width: 10px;
 height: 10px;
 border-radius: 999px;
 background: var(--color-accent);
}
.dot:nth-child(2) {
 background: var(--color-primary);
}
.dot:nth-child(3) {
 background: var(--color-secondary);
}
.address-bar {
 flex: 1;
 margin-left: 8px;
 min-height: 30px;
 border-radius: 999px;
 background: rgba(255,255,255,0.10);
 display: flex;
 align-items: center;
 padding: 0 12px;
 color: #D8DEE8;
 font-size: 13px;
 overflow: hidden;
 white-space: nowrap;
 text-overflow: ellipsis;
}
.browser-body {
 padding: 20px;
 display: grid;
 gap: 16px;
}
.status-row {
 display: flex;
 gap: 10px;
 flex-wrap: wrap;
}
.status-pill {
 display: inline-flex;
 align-items: center;
 gap: 6px;
 min-height: 30px;
 padding: 0 10px;
 border-radius: 999px;
 background: rgba(0,200,150,0.14);
 color: #B9FFE9;
 border: 1px solid rgba(0,200,150,0.28);
 font-size: 13px;
 font-weight: 700;
}
.entry-panel {
 display: grid;
 grid-template-columns: 1fr 145px;
 gap: 16px;
}
.entry-panel-main {
 min-height: 190px;
 border-radius: 14px;
 background: #fff;
 color: var(--color-text);
 padding: 18px;
 display: flex;
 flex-direction: column;
 justify-content: space-between;
}
.entry-panel-main strong {
 font-size: 20px;
 line-height: 1.35;
}
.entry-panel-main p {
 margin-top: 8px;
 color: var(--color-muted);
 font-size: 14px;
 line-height: 1.65;
}
.entry-code {
 border-radius: 14px;
 background:
  linear-gradient(135deg, rgba(0,200,150,0.16), rgba(123,92,255,0.18)),
  #fff;
 color: var(--color-text);
 display: grid;
 place-items: center;
 padding: 12px;
 text-align: center;
}
.qr-box {
 width: 94px;
 height: 94px;
 border-radius: 12px;
 border: 1px solid var(--color-border);
 background:
  linear-gradient(90deg, #111318 10px, transparent 10px) 0 0/22px 22px,
  linear-gradient(#111318 10px, transparent 10px) 0 0/22px 22px,
  #fff;
 margin: 0 auto 10px;
}
.entry-code span {
 display: block;
 color: var(--color-muted);
 font-size: 13px;
 line-height: 1.45;
}
.hero-note-list {
 display: grid;
 gap: 10px;
}
.hero-note {
 display: flex;
 align-items: flex-start;
 gap: 10px;
 padding: 12px;
 border-radius: 12px;
 background: rgba(255,255,255,0.08);
 border: 1px solid rgba(255,255,255,0.12);
 color: #E6EAF0;
 font-size: 14px;
}
.hero-note i,
.check-list i,
.step-num {
 flex: 0 0 auto;
 width: 24px;
 height: 24px;
 border-radius: 8px;
 background: var(--color-primary);
 color: #082018;
 display: grid;
 place-items: center;
 font-style: normal;
 font-weight: 900;
 font-size: 13px;
}
.section {
 padding: 70px 0;
}
.section-white {
 background: #fff;
}
.section-dark {
 background: var(--color-dark);
 color: #fff;
}
.section-head {
 display: flex;
 justify-content: space-between;
 gap: 22px;
 align-items: end;
 margin-bottom: 28px;
}
.section-kicker {
 background: rgba(123,92,255,0.10);
 color: var(--color-secondary);
 margin-bottom: 10px;
}
.section-title {
 font-size: clamp(24px, 3vw, 34px);
 line-height: 1.3;
 font-weight: 900;
 letter-spacing: 0;
}
.section-desc {
 max-width: 680px;
 color: var(--color-muted);
 margin-top: 10px;
}
.section-dark .section-desc {
 color: #C9D1DC;
}
.quick-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 16px;
}
.quick-card,
.info-card,
.notice-card,
.related-card,
.faq-item {
 background: var(--color-card);
 border: 1px solid var(--color-border);
 border-radius: var(--radius-md);
 box-shadow: var(--shadow-sm);
 transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.quick-card:hover,
.info-card:hover,
.notice-card:hover,
.related-card:hover {
 transform: translateY(-3px);
 box-shadow: var(--shadow-md);
 border-color: rgba(0,200,150,0.42);
}
.quick-card {
 padding: 18px;
 min-height: 168px;
}
.card-icon {
 width: 42px;
 height: 42px;
 border-radius: 12px;
 display: grid;
 place-items: center;
 font-weight: 900;
 color: #fff;
 background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
 margin-bottom: 14px;
}
.quick-card h2,
.info-card h2,
.notice-card h2,
.related-card h2 {
 font-size: 19px;
 line-height: 1.38;
 font-weight: 850;
}
.quick-card p,
.info-card p,
.notice-card p,
.related-card p {
 margin-top: 8px;
 color: var(--color-muted);
 font-size: 14px;
 line-height: 1.65;
}
.entry-search {
 display: grid;
 grid-template-columns: 1fr auto;
 gap: 12px;
 padding: 14px;
 border-radius: var(--radius-lg);
 background: #fff;
 border: 1px solid var(--color-border);
 box-shadow: var(--shadow-sm);
 margin-bottom: 18px;
}
.entry-search input {
 width: 100%;
 min-height: 48px;
 border: 1px solid var(--color-border);
 border-radius: 10px;
 padding: 0 14px;
 color: var(--color-text);
 outline: none;
}
.entry-search input::placeholder {
 color: #98A2B3;
}
.entry-layout {
 display: grid;
 grid-template-columns: 1.02fr 0.98fr;
 gap: 24px;
 align-items: start;
}
.step-list {
 display: grid;
 gap: 14px;
}
.step-item {
 display: grid;
 grid-template-columns: 44px 1fr;
 gap: 14px;
 padding: 18px;
 border-radius: var(--radius-md);
 background: #fff;
 border: 1px solid var(--color-border);
 box-shadow: var(--shadow-sm);
}
.step-num {
 width: 44px;
 height: 44px;
 border-radius: 12px;
 font-size: 16px;
}
.step-item h2 {
 font-size: 19px;
 line-height: 1.36;
 font-weight: 850;
}
.step-item p {
 color: var(--color-muted);
 margin-top: 6px;
 font-size: 15px;
}
.info-stack {
 display: grid;
 gap: 16px;
}
.info-card {
 padding: 20px;
}
.badge-row {
 display: flex;
 flex-wrap: wrap;
 gap: 8px;
 margin-top: 14px;
}
.badge {
 display: inline-flex;
 align-items: center;
 min-height: 28px;
 padding: 0 10px;
 border-radius: 999px;
 background: rgba(0,200,150,0.12);
 color: var(--color-primary-dark);
 font-size: 13px;
 font-weight: 800;
}
.badge-purple {
 background: rgba(123,92,255,0.12);
 color: var(--color-secondary);
}
.badge-orange {
 background: rgba(255,138,42,0.14);
 color: #B95C08;
}
.compare-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 18px;
}
.notice-card {
 padding: 20px;
 position: relative;
 overflow: hidden;
}
.notice-card::before {
 content: "";
 position: absolute;
 left: 0;
 top: 0;
 width: 5px;
 height: 100%;
 background: var(--color-primary);
}
.notice-card:nth-child(2)::before {
 background: var(--color-secondary);
}
.notice-card:nth-child(3)::before {
 background: var(--color-accent);
}
.check-list {
 list-style: none;
 display: grid;
 gap: 12px;
 margin-top: 16px;
}
.check-list li {
 display: flex;
 align-items: flex-start;
 gap: 10px;
 color: var(--color-muted);
}
.download-band {
 display: grid;
 grid-template-columns: 1fr 0.78fr;
 gap: 24px;
 align-items: center;
 padding: 28px;
 border: 1px solid rgba(255,255,255,0.14);
 border-radius: var(--radius-lg);
 background:
  linear-gradient(135deg, rgba(0,200,150,0.15), rgba(123,92,255,0.12)),
  var(--color-dark-soft);
}
.download-meta {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 12px;
 margin-top: 20px;
}
.meta-box {
 border: 1px solid rgba(255,255,255,0.14);
 border-radius: 12px;
 padding: 14px;
 background: rgba(255,255,255,0.06);
}
.meta-box span {
 display: block;
 color: #AAB4C0;
 font-size: 13px;
}
.meta-box strong {
 display: block;
 margin-top: 4px;
 color: #fff;
 font-size: 17px;
}
.download-actions {
 display: flex;
 flex-wrap: wrap;
 gap: 12px;
 margin-top: 22px;
}
.mini-screen {
 background: #fff;
 color: var(--color-text);
 border-radius: 16px;
 padding: 18px;
 box-shadow: 0 18px 38px rgba(0,0,0,0.24);
}
.mini-top {
 display: flex;
 justify-content: space-between;
 align-items: center;
 margin-bottom: 14px;
}
.mini-logo {
 width: 42px;
 height: 42px;
 border-radius: 12px;
 background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
 color: #fff;
 display: grid;
 place-items: center;
 font-weight: 900;
}
.progress {
 height: 10px;
 border-radius: 999px;
 background: #EEF2F6;
 overflow: hidden;
 margin: 14px 0;
}
.progress span {
 display: block;
 width: 72%;
 height: 100%;
 background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
 border-radius: inherit;
}
.related-grid {
 display: grid;
 grid-template-columns: 1.2fr 0.8fr 0.8fr;
 gap: 18px;
}
.related-card {
 padding: 20px;
 min-height: 188px;
 display: flex;
 flex-direction: column;
 justify-content: space-between;
}
.card-link {
 display: inline-flex;
 align-items: center;
 gap: 6px;
 margin-top: 16px;
 color: var(--color-primary-dark);
 font-weight: 800;
}
.card-link:hover {
 text-decoration: underline;
}
.faq-wrap {
 display: grid;
 gap: 12px;
}
.faq-item {
 overflow: hidden;
}
.faq-trigger {
 width: 100%;
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 16px;
 padding: 18px 20px;
 color: var(--color-text);
 text-align: left;
 font-weight: 850;
}
.faq-trigger span {
 line-height: 1.45;
}
.faq-icon {
 width: 28px;
 height: 28px;
 border-radius: 9px;
 background: rgba(0,200,150,0.12);
 color: var(--color-primary-dark);
 display: grid;
 place-items: center;
 flex: 0 0 auto;
 transition: transform var(--transition), background var(--transition);
}
.faq-answer {
 display: none;
 padding: 0 20px 18px;
 color: var(--color-muted);
}
.faq-item.is-open {
 border-color: rgba(0,200,150,0.45);
}
.faq-item.is-open .faq-icon {
 transform: rotate(45deg);
 background: var(--color-primary);
 color: #082018;
}
.faq-item.is-open .faq-answer {
 display: block;
}
.cta-panel {
 border-radius: var(--radius-lg);
 padding: 30px;
 background:
  linear-gradient(135deg, rgba(0,200,150,0.14), rgba(123,92,255,0.10)),
  #fff;
 border: 1px solid var(--color-border);
 display: grid;
 grid-template-columns: 1fr auto;
 gap: 22px;
 align-items: center;
 box-shadow: var(--shadow-sm);
}
.cta-panel h2 {
 font-size: clamp(23px, 3vw, 32px);
 font-weight: 900;
 line-height: 1.32;
}
.cta-panel p {
 color: var(--color-muted);
 margin-top: 8px;
}
.cta-actions {
 display: flex;
 gap: 12px;
 flex-wrap: wrap;
 justify-content: flex-end;
}
.site-footer {
 background: var(--color-dark);
 color: #D6DCE5;
 padding: 54px 0 24px;
}
.footer-grid {
 display: grid;
 grid-template-columns: 1.25fr repeat(3, 1fr);
 gap: 28px;
}
.footer-title {
 font-size: 17px;
 font-weight: 850;
 color: #fff;
 margin-bottom: 12px;
}
.footer-text {
 color: #AAB4C0;
 font-size: 14px;
 line-height: 1.75;
}
.footer-links {
 list-style: none;
 display: grid;
 gap: 8px;
}
.footer-links a {
 color: #AAB4C0;
 font-size: 14px;
}
.footer-links a:hover {
 color: var(--color-primary);
 text-decoration: underline;
}
.copyright {
 margin-top: 34px;
 padding-top: 20px;
 border-top: 1px solid rgba(255,255,255,0.12);
 display: flex;
 justify-content: space-between;
 gap: 16px;
 color: #8E99A8;
 font-size: 13px;
}
@media (max-width: 1100px) {
 .nav-wrap {
  gap: 14px;
 }
 .nav-menu a {
  padding: 0 9px;
  font-size: 14px;
 }
 .entry-hero-grid,
 .entry-layout,
 .download-band {
  grid-template-columns: 1fr;
 }
 .quick-grid,
 .compare-grid {
  grid-template-columns: repeat(2, 1fr);
 }
 .related-grid {
  grid-template-columns: 1fr 1fr;
 }
}
@media (max-width: 860px) {
 .container {
  width: min(100% - 28px, var(--container));
 }
 .nav-wrap {
  min-height: 66px;
 }
 .menu-toggle {
  display: inline-flex;
 }
 nav {
  order: 3;
 }
 .nav-menu {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 66px;
  display: none;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-md);
 }
 .nav-menu.is-open {
  display: flex;
 }
 .nav-menu a {
  height: 46px;
  justify-content: center;
 }
 .nav-actions {
  display: none;
 }
 .page-hero {
  padding: 42px 0 36px;
 }
 .entry-panel {
  grid-template-columns: 1fr;
 }
 .section {
  padding: 52px 0;
 }
 .section-head {
  display: block;
 }
 .download-meta,
 .footer-grid {
  grid-template-columns: 1fr 1fr;
 }
 .cta-panel {
  grid-template-columns: 1fr;
 }
 .cta-actions {
  justify-content: flex-start;
 }
}
@media (max-width: 620px) {
 body {
  font-size: 15px;
 }
 .brand-text {
  font-size: 16px;
 }
 .brand-mark {
  width: 36px;
  height: 36px;
 }
 .hero-actions,
 .download-actions,
 .cta-actions {
  flex-direction: column;
 }
 .btn {
  width: 100%;
  white-space: normal;
  text-align: center;
 }
 .quick-grid,
 .compare-grid,
 .related-grid,
 .download-meta,
 .footer-grid {
  grid-template-columns: 1fr;
 }
 .entry-search {
  grid-template-columns: 1fr;
 }
 .step-item {
  grid-template-columns: 1fr;
 }
 .download-band,
 .cta-panel {
  padding: 22px;
 }
 .browser-body {
  padding: 16px;
 }
 .copyright {
  flex-direction: column;
 }
}
@media (max-width: 375px) {
 .container {
  width: min(100% - 22px, var(--container));
 }
 .page-hero h1 {
  font-size: 28px;
 }
 .hero-desc {
  font-size: 15px;
 }
 .quick-card,
 .info-card,
 .notice-card,
 .related-card {
  padding: 16px;
 }
}

/* roulang page: category5 */
:root {
      --color-primary: #00C896;
      --color-primary-dark: #00A87E;
      --color-secondary: #7B5CFF;
      --color-accent: #FF8A2A;
      --color-dark: #111318;
      --color-dark-soft: #1B1F25;
      --color-text: #1F2328;
      --color-muted: #667085;
      --color-subtle: #F6F8FA;
      --color-card: #FFFFFF;
      --color-border: #E4E7EC;
      --color-line: rgba(255,255,255,0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 8px 24px rgba(16,24,40,0.08);
      --shadow-md: 0 14px 34px rgba(16,24,40,0.12);
      --container: 1200px;
      --transition: 180ms ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--color-text);
      background: var(--color-subtle);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
    }

    a:hover {
      color: var(--color-primary-dark);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
      background: none;
    }

    ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    p {
      margin: 0;
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.94);
      border-bottom: 1px solid var(--color-border);
      backdrop-filter: blur(12px);
    }

    .nav-wrap {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      color: var(--color-dark);
      white-space: nowrap;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.22);
    }

    .brand-text {
      font-size: 18px;
      letter-spacing: 0;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 4px;
      list-style: none;
    }

    .nav-menu a {
      display: inline-flex;
      align-items: center;
      height: 40px;
      padding: 0 12px;
      border-radius: 10px;
      color: #424A55;
      font-size: 15px;
      font-weight: 650;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--color-dark);
      background: rgba(0, 200, 150, 0.12);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-dark);
      align-items: center;
      justify-content: center;
    }

    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after {
      display: block;
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 4px;
      position: relative;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
    }

    .menu-toggle span::before {
      top: -7px;
    }

    .menu-toggle span::after {
      top: 7px;
    }

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 18px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 750;
      border: 1px solid transparent;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #082018;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.25);
    }

    .btn-primary:hover {
      background: var(--color-primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(0, 168, 126, 0.30);
    }

    .btn-secondary {
      background: #fff;
      border-color: var(--color-border);
      color: var(--color-text);
    }

    .btn-secondary:hover {
      border-color: var(--color-primary);
      color: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    .btn-dark {
      background: rgba(255,255,255,0.08);
      border-color: rgba(255,255,255,0.22);
      color: #fff;
    }

    .btn-dark:hover {
      background: rgba(0,200,150,0.16);
      border-color: var(--color-primary);
      color: #fff;
      transform: translateY(-2px);
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(0, 200, 150, 0.36);
      outline-offset: 3px;
    }

    .page-hero {
      position: relative;
      background:
        linear-gradient(90deg, rgba(17,19,24,0.96), rgba(17,19,24,0.90)),
        radial-gradient(circle at 78% 28%, rgba(0,200,150,0.26), transparent 34%),
        radial-gradient(circle at 16% 80%, rgba(123,92,255,0.20), transparent 32%),
        #111318;
      color: #fff;
      padding: 54px 0 34px;
      overflow: hidden;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 46px 46px;
      opacity: 0.24;
      pointer-events: none;
    }

    .page-hero-shell {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 410px;
      gap: 34px;
      align-items: center;
    }

    .hero-kicker,
    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 750;
    }

    .hero-kicker {
      background: rgba(0,200,150,0.13);
      border: 1px solid rgba(0,200,150,0.35);
      color: #A8FFE5;
      margin-bottom: 16px;
    }

    .page-hero h1 {
      max-width: 760px;
      font-size: clamp(30px, 4vw, 44px);
      line-height: 1.22;
      font-weight: 900;
      letter-spacing: 0;
      margin: 0 0 16px;
    }

    .hero-lead {
      max-width: 720px;
      color: #D5DAE2;
      font-size: 17px;
      line-height: 1.8;
      margin-bottom: 22px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 22px;
    }

    .hero-note-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .hero-note {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 32px;
      padding: 0 11px;
      border: 1px solid rgba(255,255,255,0.14);
      border-radius: 999px;
      color: #EEF2F7;
      background: rgba(255,255,255,0.06);
      font-size: 14px;
      font-weight: 650;
    }

    .search-panel {
      border: 1px solid rgba(255,255,255,0.16);
      background: rgba(255,255,255,0.07);
      border-radius: var(--radius-lg);
      padding: 18px;
      box-shadow: 0 18px 42px rgba(0,0,0,0.22);
    }

    .search-panel-title {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      color: #fff;
      font-weight: 850;
    }

    .status-dot {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: #A8FFE5;
      font-size: 13px;
      font-weight: 750;
    }

    .status-dot::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-primary);
      box-shadow: 0 0 0 5px rgba(0,200,150,0.14);
    }

    .search-box {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 50px;
      padding: 0 12px;
      border-radius: 12px;
      background: #fff;
      border: 1px solid rgba(255,255,255,0.22);
      margin-bottom: 14px;
    }

    .search-icon {
      color: var(--color-primary-dark);
      font-weight: 900;
    }

    .search-box input {
      width: 100%;
      border: 0;
      outline: none;
      color: var(--color-text);
      background: transparent;
      font-size: 15px;
    }

    .search-box input::placeholder {
      color: #98A2B3;
    }

    .hot-question {
      display: grid;
      gap: 10px;
    }

    .hot-question a {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 12px;
      border-radius: 12px;
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.12);
      color: #F8FAFC;
      font-size: 14px;
      line-height: 1.55;
    }

    .hot-question a:hover {
      color: #fff;
      border-color: rgba(0,200,150,0.45);
      background: rgba(0,200,150,0.12);
      transform: translateY(-1px);
    }

    .hot-question span {
      color: var(--color-primary);
      font-weight: 900;
    }

    .section {
      padding: 68px 0;
    }

    .section-sm {
      padding: 52px 0;
    }

    .section-dark {
      background: var(--color-dark);
      color: #fff;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-kicker {
      background: rgba(123,92,255,0.10);
      color: var(--color-secondary);
      margin-bottom: 10px;
    }

    .section-dark .section-kicker {
      background: rgba(0,200,150,0.12);
      border: 1px solid rgba(0,200,150,0.26);
      color: #A8FFE5;
    }

    .section-title {
      font-size: clamp(24px, 3vw, 34px);
      line-height: 1.28;
      font-weight: 900;
      letter-spacing: 0;
      margin: 0;
    }

    .section-desc {
      max-width: 620px;
      color: var(--color-muted);
      line-height: 1.75;
      margin-top: 10px;
    }

    .section-dark .section-desc {
      color: #C7CED8;
    }

    .quick-grid {
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      gap: 14px;
    }

    .quick-card {
      min-height: 132px;
      padding: 18px;
      border-radius: var(--radius-md);
      background: var(--color-card);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .quick-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.45);
      color: var(--color-text);
    }

    .quick-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      font-weight: 900;
      margin-bottom: 14px;
    }

    .quick-card:nth-child(2) .quick-icon,
    .quick-card:nth-child(4) .quick-icon {
      background: rgba(123,92,255,0.12);
      color: var(--color-secondary);
    }

    .quick-card:nth-child(3) .quick-icon {
      background: rgba(255,138,42,0.14);
      color: var(--color-accent);
    }

    .quick-title {
      font-size: 17px;
      font-weight: 850;
      line-height: 1.45;
      margin-bottom: 6px;
    }

    .quick-text {
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.6;
    }

    .faq-layout {
      display: grid;
      grid-template-columns: 270px minmax(0, 1fr);
      gap: 24px;
      align-items: start;
    }

    .faq-tabs {
      position: sticky;
      top: 92px;
      display: grid;
      gap: 10px;
      padding: 14px;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .faq-tabs a {
      min-height: 42px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 0 12px;
      border-radius: 10px;
      color: #3F4752;
      font-weight: 750;
      font-size: 15px;
    }

    .faq-tabs a:hover,
    .faq-tabs a.active {
      background: rgba(0,200,150,0.12);
      color: var(--color-dark);
    }

    .faq-tabs b {
      color: var(--color-primary-dark);
      font-size: 13px;
    }

    .faq-content {
      display: grid;
      gap: 22px;
    }

    .faq-group {
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .faq-group-head {
      padding: 22px 24px;
      border-bottom: 1px solid var(--color-border);
      background: linear-gradient(90deg, rgba(0,200,150,0.10), rgba(123,92,255,0.07));
    }

    .faq-group-head h2 {
      font-size: 23px;
      line-height: 1.35;
      margin: 0 0 8px;
      font-weight: 900;
      letter-spacing: 0;
    }

    .faq-group-head p {
      color: var(--color-muted);
      line-height: 1.7;
    }

    .faq-list {
      display: grid;
    }

    .faq-item {
      border-bottom: 1px solid var(--color-border);
      background: #fff;
    }

    .faq-item:last-child {
      border-bottom: 0;
    }

    .faq-item details {
      padding: 0;
    }

    .faq-item summary {
      min-height: 66px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 18px 24px;
      cursor: pointer;
      color: var(--color-text);
      font-size: 17px;
      font-weight: 850;
      line-height: 1.5;
      list-style: none;
      transition: color var(--transition), background var(--transition);
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "+";
      width: 30px;
      height: 30px;
      flex: 0 0 auto;
      border-radius: 9px;
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      display: grid;
      place-items: center;
      font-size: 20px;
      font-weight: 850;
      transition: transform var(--transition), background var(--transition);
    }

    .faq-item details[open] summary {
      color: var(--color-primary-dark);
      background: rgba(0,200,150,0.04);
    }

    .faq-item details[open] summary::after {
      content: "－";
      background: var(--color-primary);
      color: #082018;
    }

    .faq-answer {
      padding: 0 24px 22px;
      color: var(--color-muted);
      line-height: 1.82;
    }

    .faq-answer ul {
      display: grid;
      gap: 8px;
      margin-top: 10px;
    }

    .faq-answer li {
      position: relative;
      padding-left: 18px;
    }

    .faq-answer li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 12px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--color-primary);
    }

    .info-band {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 22px;
    }

    .info-card {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: var(--color-card);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .info-card h2 {
      font-size: 25px;
      line-height: 1.32;
      margin: 0 0 12px;
      font-weight: 900;
      letter-spacing: 0;
    }

    .info-card p {
      color: var(--color-muted);
      margin-bottom: 18px;
    }

    .check-list {
      display: grid;
      gap: 12px;
    }

    .check-list li {
      display: grid;
      grid-template-columns: 28px minmax(0, 1fr);
      gap: 10px;
      align-items: start;
      color: #48515C;
      line-height: 1.65;
    }

    .check-list li::before {
      content: "✓";
      width: 28px;
      height: 28px;
      border-radius: 8px;
      display: grid;
      place-items: center;
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      font-weight: 900;
      line-height: 1;
    }

    .download-panel {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 24px;
      align-items: stretch;
    }

    .download-copy {
      padding: 28px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255,255,255,0.14);
      background: rgba(255,255,255,0.06);
    }

    .download-copy h2 {
      font-size: clamp(24px, 3vw, 32px);
      line-height: 1.3;
      font-weight: 900;
      letter-spacing: 0;
      margin: 0 0 12px;
    }

    .download-copy p {
      color: #C7CED8;
      margin-bottom: 18px;
    }

    .download-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .version-card {
      padding: 22px;
      border-radius: var(--radius-lg);
      background: #fff;
      color: var(--color-text);
      border: 1px solid rgba(255,255,255,0.18);
    }

    .version-top {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      align-items: flex-start;
      margin-bottom: 16px;
    }

    .app-badge {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      background: rgba(255,138,42,0.13);
      color: #B85400;
      font-size: 13px;
      font-weight: 850;
      white-space: nowrap;
    }

    .version-title {
      font-size: 20px;
      font-weight: 900;
      line-height: 1.4;
      margin-bottom: 4px;
    }

    .version-meta {
      color: var(--color-muted);
      font-size: 14px;
    }

    .qr-box {
      min-height: 150px;
      border: 1px dashed #B9C2CF;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background:
        linear-gradient(45deg, rgba(0,200,150,0.08) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(123,92,255,0.08) 25%, transparent 25%),
        #F8FAFC;
      background-size: 18px 18px;
      color: #4B5563;
      text-align: center;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      background: rgba(0,200,150,0.10);
      color: var(--color-primary-dark);
      font-size: 13px;
      font-weight: 800;
    }

    .tag.purple {
      background: rgba(123,92,255,0.10);
      color: var(--color-secondary);
    }

    .tag.orange {
      background: rgba(255,138,42,0.13);
      color: #B85400;
    }

    .notice-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .notice-card {
      padding: 22px;
      border-radius: var(--radius-md);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .notice-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.42);
    }

    .notice-num {
      width: 38px;
      height: 38px;
      border-radius: 11px;
      display: grid;
      place-items: center;
      background: var(--color-dark);
      color: var(--color-primary);
      font-weight: 900;
      margin-bottom: 14px;
    }

    .notice-card h3 {
      font-size: 19px;
      line-height: 1.42;
      margin: 0 0 8px;
      font-weight: 900;
      letter-spacing: 0;
    }

    .notice-card p {
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    .cta-strip {
      padding: 34px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(90deg, rgba(0,200,150,0.14), rgba(123,92,255,0.12)),
        #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: center;
    }

    .cta-strip h2 {
      font-size: clamp(23px, 3vw, 31px);
      line-height: 1.32;
      font-weight: 900;
      letter-spacing: 0;
      margin: 0 0 8px;
    }

    .cta-strip p {
      color: var(--color-muted);
      max-width: 760px;
    }

    .site-footer {
      background: var(--color-dark);
      color: #D2D8E2;
      padding: 56px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.35fr 0.75fr 0.75fr 0.85fr;
      gap: 32px;
      padding-bottom: 30px;
      border-bottom: 1px solid rgba(255,255,255,0.12);
    }

    .footer-title {
      color: #fff;
      font-size: 17px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .footer-text {
      color: #AEB7C4;
      line-height: 1.8;
      max-width: 410px;
    }

    .footer-links {
      display: grid;
      gap: 9px;
    }

    .footer-links a {
      color: #AEB7C4;
      font-size: 15px;
    }

    .footer-links a:hover {
      color: var(--color-primary);
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .copyright {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding-top: 20px;
      color: #98A2B3;
      font-size: 14px;
    }

    @media (max-width: 1100px) {
      .nav-wrap {
        gap: 14px;
      }

      .nav-menu a {
        padding: 0 9px;
        font-size: 14px;
      }

      .page-hero-shell,
      .download-panel {
        grid-template-columns: 1fr;
      }

      .search-panel {
        max-width: 720px;
      }

      .quick-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 900px) {
      .menu-toggle {
        display: inline-flex;
      }

      .site-header nav {
        order: 3;
      }

      .nav-wrap {
        min-height: 68px;
        flex-wrap: wrap;
      }

      .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        padding: 0 0 16px;
      }

      .nav-menu.open {
        display: flex;
      }

      .nav-menu a {
        width: 100%;
        height: 46px;
        justify-content: center;
        background: #fff;
        border: 1px solid var(--color-border);
      }

      .faq-layout {
        grid-template-columns: 1fr;
      }

      .faq-tabs {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .info-band,
      .notice-grid {
        grid-template-columns: 1fr;
      }

      .cta-strip {
        grid-template-columns: 1fr;
      }

      .cta-strip .btn {
        width: fit-content;
      }
    }

    @media (max-width: 767px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .nav-actions {
        display: none;
      }

      .brand-text {
        font-size: 16px;
      }

      .page-hero {
        padding: 42px 0 28px;
      }

      .hero-lead {
        font-size: 16px;
      }

      .hero-actions,
      .download-actions {
        flex-direction: column;
      }

      .hero-actions .btn,
      .download-actions .btn {
        width: 100%;
      }

      .section {
        padding: 48px 0;
      }

      .section-sm {
        padding: 40px 0;
      }

      .section-head {
        display: block;
      }

      .quick-grid,
      .faq-tabs {
        grid-template-columns: 1fr;
      }

      .quick-card {
        min-height: auto;
      }

      .faq-group-head,
      .faq-item summary,
      .faq-answer,
      .download-copy,
      .version-card,
      .cta-strip {
        padding-left: 18px;
        padding-right: 18px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .copyright {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 420px) {
      .brand {
        gap: 9px;
      }

      .brand-mark {
        width: 34px;
        height: 34px;
      }

      .page-hero h1 {
        font-size: 29px;
      }

      .search-panel {
        padding: 14px;
      }

      .hot-question a {
        flex-direction: column;
        gap: 4px;
      }

      .version-top {
        flex-direction: column;
      }

      .btn {
        width: 100%;
        white-space: normal;
        text-align: center;
      }
    }

/* roulang page: category4 */
:root {
      --color-primary: #00C896;
      --color-primary-dark: #00A87E;
      --color-secondary: #7B5CFF;
      --color-accent: #FF8A2A;
      --color-dark: #111318;
      --color-dark-soft: #1B1F25;
      --color-text: #1F2328;
      --color-muted: #667085;
      --color-subtle: #F6F8FA;
      --color-card: #FFFFFF;
      --color-border: #E4E7EC;
      --color-line: rgba(255,255,255,0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 8px 24px rgba(16,24,40,0.08);
      --shadow-md: 0 14px 34px rgba(16,24,40,0.12);
      --container: 1200px;
      --transition: 180ms ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--color-text);
      background: var(--color-subtle);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
    }

    a:hover {
      color: var(--color-primary-dark);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
      background: none;
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.94);
      border-bottom: 1px solid var(--color-border);
      backdrop-filter: blur(12px);
    }

    .nav-wrap {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      color: var(--color-dark);
      white-space: nowrap;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.22);
    }

    .brand-text {
      font-size: 18px;
      letter-spacing: 0;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 4px;
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .nav-menu a {
      display: inline-flex;
      align-items: center;
      height: 40px;
      padding: 0 12px;
      border-radius: 10px;
      color: #424A55;
      font-size: 15px;
      font-weight: 650;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--color-dark);
      background: rgba(0, 200, 150, 0.12);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-dark);
      align-items: center;
      justify-content: center;
    }

    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after {
      display: block;
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 4px;
      position: relative;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
    }

    .menu-toggle span::before {
      top: -7px;
    }

    .menu-toggle span::after {
      top: 7px;
    }

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 18px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 750;
      border: 1px solid transparent;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #082018;
      box-shadow: 0 10px 22px rgba(0, 200, 150, 0.25);
    }

    .btn-primary:hover {
      background: var(--color-primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(0, 168, 126, 0.30);
    }

    .btn-secondary {
      background: #fff;
      border-color: var(--color-border);
      color: var(--color-text);
    }

    .btn-secondary:hover {
      border-color: var(--color-primary);
      color: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    .btn-dark {
      background: rgba(255,255,255,0.08);
      border-color: rgba(255,255,255,0.22);
      color: #fff;
    }

    .btn-dark:hover {
      background: rgba(0,200,150,0.16);
      border-color: var(--color-primary);
      color: #fff;
      transform: translateY(-2px);
    }

    .page-hero {
      position: relative;
      color: #fff;
      background:
        linear-gradient(90deg, rgba(17,19,24,0.96), rgba(17,19,24,0.88)),
        radial-gradient(circle at 78% 20%, rgba(0,200,150,0.22), transparent 32%),
        radial-gradient(circle at 18% 88%, rgba(123,92,255,0.18), transparent 30%),
        #111318;
      padding: 54px 0 42px;
      overflow: hidden;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 46px 46px;
      opacity: 0.22;
      pointer-events: none;
    }

    .guide-hero {
      position: relative;
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 36px;
      align-items: center;
    }

    .hero-kicker,
    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 750;
    }

    .hero-kicker {
      background: rgba(0,200,150,0.13);
      border: 1px solid rgba(0,200,150,0.35);
      color: #A8FFE5;
      margin-bottom: 16px;
    }

    .section-kicker {
      background: rgba(123,92,255,0.10);
      color: #5E45D8;
      margin-bottom: 10px;
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      max-width: 760px;
      font-size: clamp(30px, 4vw, 44px);
      line-height: 1.22;
      font-weight: 900;
      letter-spacing: 0;
      margin-bottom: 16px;
    }

    .hero-lead {
      color: rgba(255,255,255,0.78);
      font-size: 17px;
      line-height: 1.8;
      max-width: 720px;
      margin-bottom: 24px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 24px;
    }

    .mini-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .meta-chip {
      display: inline-flex;
      align-items: center;
      min-height: 34px;
      padding: 0 12px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,0.16);
      background: rgba(255,255,255,0.06);
      color: rgba(255,255,255,0.82);
      font-size: 14px;
      font-weight: 650;
    }

    .guide-board {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .board-card {
      min-height: 132px;
      padding: 18px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255,255,255,0.15);
      background: rgba(255,255,255,0.07);
    }

    .board-card.large {
      grid-column: span 2;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 16px;
      align-items: center;
      background: linear-gradient(135deg, rgba(0,200,150,0.18), rgba(123,92,255,0.15));
    }

    .board-card strong {
      display: block;
      color: #fff;
      font-size: 18px;
      line-height: 1.45;
      margin-bottom: 8px;
    }

    .board-card p {
      margin: 0;
      color: rgba(255,255,255,0.70);
      font-size: 14px;
      line-height: 1.65;
    }

    .status-stack {
      display: grid;
      gap: 8px;
      min-width: 156px;
    }

    .status-line {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: rgba(255,255,255,0.76);
      font-size: 13px;
      border-bottom: 1px solid rgba(255,255,255,0.12);
      padding-bottom: 6px;
    }

    main {
      overflow: hidden;
    }

    .section {
      padding: 72px 0;
    }

    .section.compact {
      padding: 54px 0;
    }

    .section.dark {
      color: #fff;
      background: var(--color-dark);
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-title {
      font-size: clamp(24px, 3vw, 34px);
      line-height: 1.3;
      font-weight: 900;
      letter-spacing: 0;
      margin-bottom: 8px;
    }

    .section-desc {
      color: var(--color-muted);
      max-width: 720px;
      margin: 0;
    }

    .dark .section-desc {
      color: rgba(255,255,255,0.72);
    }

    .anchor-tabs {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      padding: 14px;
      border: 1px solid var(--color-border);
      background: #fff;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      margin-top: -28px;
      position: relative;
      z-index: 2;
    }

    .anchor-tabs a {
      display: inline-flex;
      align-items: center;
      min-height: 38px;
      padding: 0 14px;
      border-radius: 10px;
      background: var(--color-subtle);
      color: #3D4652;
      font-size: 14px;
      font-weight: 750;
      border: 1px solid transparent;
    }

    .anchor-tabs a:hover {
      background: rgba(0,200,150,0.11);
      border-color: rgba(0,200,150,0.24);
      color: var(--color-primary-dark);
    }

    .guide-layout {
      display: grid;
      grid-template-columns: 280px 1fr;
      gap: 26px;
      align-items: start;
    }

    .guide-nav {
      position: sticky;
      top: 96px;
      padding: 18px;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .guide-nav-title {
      font-size: 15px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .guide-nav a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 42px;
      padding: 0 12px;
      border-radius: 10px;
      color: #46505C;
      font-size: 14px;
      font-weight: 700;
    }

    .guide-nav a:hover {
      background: rgba(0,200,150,0.10);
      color: var(--color-primary-dark);
    }

    .guide-stack {
      display: grid;
      gap: 18px;
    }

    .guide-panel {
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-border);
      background: #fff;
      box-shadow: var(--shadow-sm);
      padding: 24px;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .guide-panel:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.35);
    }

    .panel-top {
      display: flex;
      align-items: start;
      justify-content: space-between;
      gap: 18px;
      margin-bottom: 16px;
    }

    .panel-icon {
      width: 48px;
      height: 48px;
      flex: 0 0 48px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: #082018;
      font-weight: 900;
      background: rgba(0,200,150,0.16);
      border: 1px solid rgba(0,200,150,0.24);
    }

    .guide-panel:nth-child(2n) .panel-icon {
      color: #fff;
      background: var(--color-secondary);
      border-color: var(--color-secondary);
    }

    .guide-panel:nth-child(3n) .panel-icon {
      color: #3A1D00;
      background: rgba(255,138,42,0.18);
      border-color: rgba(255,138,42,0.30);
    }

    .panel-title {
      font-size: 22px;
      line-height: 1.45;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .panel-desc {
      color: var(--color-muted);
      margin: 0;
    }

    .tip-list {
      display: grid;
      gap: 10px;
      padding: 0;
      margin: 18px 0 0;
      list-style: none;
    }

    .tip-list li {
      display: flex;
      gap: 10px;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      background: var(--color-subtle);
      color: #46505C;
      font-size: 15px;
    }

    .tip-list li::before {
      content: "";
      width: 8px;
      height: 8px;
      flex: 0 0 8px;
      margin-top: 9px;
      border-radius: 50%;
      background: var(--color-primary);
    }

    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }

    .scenario-card {
      min-height: 100%;
      padding: 22px;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      background: #fff;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .scenario-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0,200,150,0.32);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      min-height: 26px;
      padding: 0 9px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0;
    }

    .badge-green {
      background: rgba(0,200,150,0.13);
      color: var(--color-primary-dark);
    }

    .badge-purple {
      background: rgba(123,92,255,0.12);
      color: #654BDE;
    }

    .badge-orange {
      background: rgba(255,138,42,0.13);
      color: #B85B09;
    }

    .scenario-card h3 {
      font-size: 20px;
      line-height: 1.45;
      font-weight: 900;
      margin: 14px 0 10px;
    }

    .scenario-card p {
      color: var(--color-muted);
      margin-bottom: 16px;
      font-size: 15px;
    }

    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--color-primary-dark);
      font-weight: 800;
      font-size: 14px;
    }

    .text-link:hover {
      text-decoration: underline;
    }

    .process-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      counter-reset: step;
    }

    .process-item {
      position: relative;
      padding: 20px;
      border-radius: var(--radius-md);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      counter-increment: step;
    }

    .process-item::before {
      content: "0" counter(step);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 32px;
      border-radius: 999px;
      background: var(--color-dark);
      color: #fff;
      font-size: 13px;
      font-weight: 900;
      margin-bottom: 14px;
    }

    .process-item h3 {
      font-size: 18px;
      font-weight: 900;
      line-height: 1.45;
      margin-bottom: 8px;
    }

    .process-item p {
      color: var(--color-muted);
      font-size: 15px;
      margin: 0;
    }

    .download-panel {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 28px;
      align-items: center;
      padding: 30px;
      border-radius: var(--radius-lg);
      background:
        radial-gradient(circle at 8% 18%, rgba(0,200,150,0.22), transparent 28%),
        linear-gradient(135deg, #161A20, #111318);
      border: 1px solid rgba(255,255,255,0.12);
      box-shadow: 0 18px 42px rgba(17,19,24,0.24);
    }

    .phone-card {
      max-width: 320px;
      margin: 0 auto;
      padding: 14px;
      border-radius: 30px;
      background: #050607;
      border: 1px solid rgba(255,255,255,0.14);
      box-shadow: 0 18px 42px rgba(0,0,0,0.30);
    }

    .phone-screen {
      min-height: 390px;
      padding: 18px;
      border-radius: 22px;
      background:
        linear-gradient(180deg, rgba(255,255,255,0.10), rgba(255,255,255,0.02)),
        #171B22;
      overflow: hidden;
       .phone-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 18px;
      color: rgba(255,255,255,0.78);
      font-size: 12px;
      font-weight: 800;
    }

    .phone-pill {
      width: 72px;
      height: 7px;
      border-radius: 999px;
      background: rgba(255,255,255,0.18);
    }

    .app-icon {
      width: 62px;
      height: 62px;
      border-radius: 18px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      color: #fff;
      font-size: 26px;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .phone-screen h3 {
      color: #fff;
      font-size: 22px;
      line-height: 1.35;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .phone-screen p {
      color: rgba(255,255,255,0.70);
      font-size: 14px;
      margin-bottom: 16px;
    }

    .phone-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 0;
      border-top: 1px solid rgba(255,255,255,0.10);
      color: rgba(255,255,255,0.74);
      font-size: 13px;
    }

    .download-info h2 {
      color: #fff;
      font-size: clamp(24px, 3vw, 34px);
      line-height: 1.32;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .download-info p {
      color: rgba(255,255,255,0.72);
      margin-bottom: 18px;
    }

    .download-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 22px;
    }

    .download-tags span {
      display: inline-flex;
      align-items: center;
      min-height: 32px;
      padding: 0 11px;
      border-radius: 999px;
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.14);
      color: rgba(255,255,255,0.82);
      font-size: 13px;
      font-weight: 750;
    }

    .download-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .faq-list {
      display: grid;
      gap: 14px;
    }

    .faq-item {
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      background: #fff;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .faq-item summary {
      cursor: pointer;
      list-style: none;
      padding: 18px 20px;
      font-size: 17px;
      font-weight: 850;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "+";
      width: 28px;
      height: 28px;
      flex: 0 0 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(0,200,150,0.12);
      color: var(--color-primary-dark);
      font-weight: 900;
    }

    .faq-item[open] {
      border-color: rgba(0,200,150,0.34);
    }

    .faq-item[open] summary::after {
      content: "−";
      background: var(--color-primary);
      color: #082018;
    }

    .faq-item p {
      padding: 0 20px 18px;
      color: var(--color-muted);
      margin: 0;
    }

    .cta-band {
      padding: 44px;
      border-radius: var(--radius-lg);
      background:
        radial-gradient(circle at 92% 20%, rgba(255,138,42,0.22), transparent 28%),
        linear-gradient(135deg, #111318, #1B1F25);
      color: #fff;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
      border: 1px solid rgba(255,255,255,0.12);
    }

    .cta-band h2 {
      font-size: clamp(24px, 3vw, 32px);
      line-height: 1.35;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .cta-band p {
      color: rgba(255,255,255,0.72);
      margin: 0;
      max-width: 720px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: flex-end;
    }

    .site-footer {
      background: var(--color-dark);
      color: rgba(255,255,255,0.72);
      padding: 54px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 0.9fr;
      gap: 28px;
      padding-bottom: 34px;
      border-bottom: 1px solid rgba(255,255,255,0.12);
    }

    .footer-title {
      color: #fff;
      font-size: 17px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .footer-text {
      margin: 0;
      color: rgba(255,255,255,0.65);
      max-width: 430px;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 9px;
    }

    .footer-links a {
      color: rgba(255,255,255,0.68);
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--color-primary);
      text-decoration: underline;
    }

    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      padding-top: 22px;
      color: rgba(255,255,255,0.52);
      font-size: 13px;
    }

    :focus-visible {
      outline: 3px solid rgba(0,200,150,0.36);
      outline-offset: 3px;
    }

    @media (max-width: 1100px) {
      .nav-wrap {
        gap: 14px;
      }

      .nav-menu a {
        padding: 0 9px;
        font-size: 14px;
      }

      .guide-hero,
      .download-panel {
        grid-template-columns: 1fr;
      }

      .guide-board {
        max-width: 720px;
      }

      .guide-layout {
        grid-template-columns: 1fr;
      }

      .guide-nav {
        position: static;
      }

      .guide-nav div + a,
      .guide-nav a {
        display: inline-flex;
        margin: 4px;
      }

      .scenario-grid,
      .process-strip {
        grid-template-columns: repeat(2, 1fr);
      }

      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 820px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .nav-wrap {
        min-height: 66px;
      }

      .menu-toggle {
        display: inline-flex;
        order: 3;
      }

      nav {
        order: 4;
      }

      .nav-menu {
        position: absolute;
        left: 14px;
        right: 14px;
        top: 66px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 12px;
        border-radius: var(--radius-md);
        background: #fff;
        border: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
      }

      .nav-menu.is-open {
        display: flex;
      }

      .nav-menu a {
        width: 100%;
        height: 44px;
      }

      .nav-actions {
        display: none;
      }

      .brand-text {
        font-size: 16px;
      }

      .page-hero {
        padding: 42px 0 34px;
      }

      .section {
        padding: 52px 0;
      }

      .section.compact {
        padding: 40px 0;
      }

      .section-head {
        display: block;
      }

      .anchor-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding: 12px;
      }

      .anchor-tabs a {
        flex: 0 0 auto;
      }

      .panel-top,
      .board-card.large,
      .cta-band {
        grid-template-columns: 1fr;
      }

      .board-card.large {
        display: block;
      }

      .status-stack {
        margin-top: 16px;
      }

      .download-panel,
      .cta-band {
        padding: 24px;
      }

      .phone-screen {
        min-height: 330px;
      }

      .cta-actions {
        justify-content: flex-start;
      }

      .copyright {
        flex-direction: column;
      }
    }

    @media (max-width: 560px) {
      body {
        font-size: 15px;
      }

      .brand-mark {
        width: 34px;
        height: 34px;
        border-radius: 9px;
      }

      .brand-text {
        max-width: 180px;
        white-space: normal;
        line-height: 1.25;
      }

      .hero-actions,
      .download-actions,
      .cta-actions {
        display: grid;
      }

      .btn {
        width: 100%;
        min-height: 46px;
      }

      .guide-board,
      .scenario-grid,
      .process-strip,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .board-card.large {
        grid-column: auto;
      }

      .guide-panel,
      .scenario-card,
      .process-item {
        padding: 18px;
      }

      .panel-top {
        display: block;
      }

      .panel-icon {
        margin-bottom: 12px;
      }

      .faq-item summary {
        align-items: flex-start;
        font-size: 16px;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}