/* roulang page: index */
:root {
      --brand: #20BFA9;
      --brand-2: #6557D2;
      --accent: #FF8A5C;
      --ink: #24312F;
      --muted: #667772;
      --soft: #F5FBF9;
      --soft-2: #EEF7F5;
      --card: #FFFFFF;
      --line: #DDEDEA;
      --line-brand: rgba(32, 191, 169, .18);
      --shadow: 0 16px 40px rgba(32, 90, 80, .08);
      --shadow-hover: 0 22px 54px rgba(32, 90, 80, .13);
      --radius-xl: 30px;
      --radius-lg: 24px;
      --radius-md: 18px;
      --radius-sm: 14px;
      --container: 1200px;
      --ease: 220ms ease;
      --gradient: linear-gradient(135deg, #20BFA9 0%, #6557D2 100%);
      --gradient-soft: linear-gradient(135deg, rgba(32,191,169,.13), rgba(101,87,210,.10));
      --orange-soft: rgba(255,138,92,.13);
      --font: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font);
      color: var(--ink);
      background:
        radial-gradient(circle at 10% 0%, rgba(32,191,169,.13), transparent 32%),
        radial-gradient(circle at 85% 5%, rgba(101,87,210,.11), transparent 34%),
        linear-gradient(180deg, #F7FCFB 0%, #FFFFFF 42%, #F5FBF9 100%);
      line-height: 1.75;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }

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

    a:hover {
      color: var(--brand-2);
    }

    img,
    svg {
      max-width: 100%;
      height: auto;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
    }

    ::selection {
      background: rgba(32, 191, 169, .22);
      color: var(--ink);
    }

    :focus-visible {
      outline: 3px solid rgba(32, 191, 169, .34);
      outline-offset: 3px;
      border-radius: 12px;
    }

    .container-fluid,
    .container {
      max-width: var(--container);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, .82);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(221, 237, 234, .82);
      transition: box-shadow var(--ease), background var(--ease);
    }

    .navbar {
      min-height: 70px;
      padding: 10px 0;
    }

    .navbar-brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      color: var(--ink);
      letter-spacing: -.02em;
      margin-right: 28px;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 15px;
      display: inline-grid;
      place-items: center;
      color: #fff;
      background: var(--gradient);
      box-shadow: 0 10px 28px rgba(32, 191, 169, .22);
      position: relative;
      overflow: hidden;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      inset: 8px 6px 8px 12px;
      background: rgba(255, 255, 255, .25);
      clip-path: polygon(0 0, 100% 50%, 0 100%);
    }

    .brand-text {
      font-size: 19px;
    }

    .navbar-nav .nav-link {
      color: var(--muted);
      font-weight: 650;
      padding: 10px 14px;
      border-radius: 999px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--ink);
      background: rgba(32, 191, 169, .09);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: auto;
    }

    .search-pill {
      width: 285px;
      height: 46px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.88);
      border-radius: 999px;
      display: flex;
      align-items: center;
      padding: 0 12px 0 16px;
      gap: 8px;
      box-shadow: 0 10px 22px rgba(32, 90, 80, .04);
    }

    .search-pill i {
      color: var(--brand);
      font-size: 16px;
    }

    .search-pill input {
      border: 0;
      outline: none;
      width: 100%;
      background: transparent;
      color: var(--ink);
      font-size: 14px;
    }

    .search-pill input::placeholder {
      color: #8a9a96;
    }

    .btn {
      min-height: 46px;
      border-radius: 999px;
      padding: 11px 20px;
      font-weight: 750;
      border: 1px solid transparent;
      letter-spacing: .01em;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
    }

    .btn:active {
      transform: translateY(1px);
    }

    .btn-primary {
      background: var(--gradient);
      border: 0;
      color: #fff;
      box-shadow: 0 14px 30px rgba(32, 191, 169, .22);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 18px 40px rgba(101, 87, 210, .22);
    }

    .btn-outline-primary {
      color: var(--ink);
      border-color: rgba(32, 191, 169, .30);
      background: rgba(255,255,255,.74);
    }

    .btn-outline-primary:hover,
    .btn-outline-primary:focus {
      color: var(--ink);
      border-color: rgba(32, 191, 169, .55);
      background: rgba(32, 191, 169, .10);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(32, 90, 80, .07);
    }

    .btn-accent {
      background: linear-gradient(135deg, #FF8A5C 0%, #FFB06F 100%);
      color: #fff;
      border: 0;
      box-shadow: 0 14px 28px rgba(255, 138, 92, .23);
    }

    .btn-accent:hover,
    .btn-accent:focus {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(255, 138, 92, .30);
    }

    .navbar-toggler {
      border: 1px solid var(--line);
      border-radius: 14px;
      width: 46px;
      height: 42px;
      box-shadow: none;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 4px rgba(32, 191, 169, .16);
    }

    .section {
      padding: 86px 0;
      position: relative;
    }

    .section-compact {
      padding: 66px 0;
    }

    .section-head {
      margin-bottom: 30px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(32, 191, 169, .10);
      color: #159f8d;
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 14px;
      border: 1px solid rgba(32, 191, 169, .15);
    }

    h1,
    h2,
    h3,
    h4 {
      color: var(--ink);
      letter-spacing: -.035em;
      line-height: 1.18;
    }

    h1 {
      font-size: clamp(2.25rem, 5vw, 4.35rem);
      font-weight: 850;
      margin-bottom: 18px;
    }

    h2 {
      font-size: clamp(1.8rem, 3.2vw, 2.65rem);
      font-weight: 820;
      margin-bottom: 14px;
    }

    h3 {
      font-size: 1.28rem;
      font-weight: 800;
    }

    .lead-text {
      color: var(--muted);
      font-size: 17px;
      line-height: 1.85;
      margin: 0;
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border-radius: 999px;
      padding: 6px 10px;
      font-size: 12px;
      line-height: 1;
      font-weight: 800;
      color: #168f80;
      background: rgba(32, 191, 169, .10);
      border: 1px solid rgba(32, 191, 169, .15);
      white-space: nowrap;
    }

    .badge-purple {
      color: #5B50C8;
      background: rgba(101, 87, 210, .10);
      border-color: rgba(101, 87, 210, .15);
    }

    .badge-orange {
      color: #C76338;
      background: var(--orange-soft);
      border-color: rgba(255, 138, 92, .20);
    }

    .soft-card {
      background: rgba(255,255,255,.86);
      border: 1px solid rgba(221, 237, 234, .88);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease), background var(--ease);
    }

    .soft-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(32, 191, 169, .34);
    }

    .hero {
      padding: 52px 0 72px;
      overflow: hidden;
      background:
        linear-gradient(90deg, rgba(245,251,249,.90), rgba(255,255,255,.70)),
        radial-gradient(circle at 72% 20%, rgba(101,87,210,.16), transparent 34%),
        radial-gradient(circle at 22% 70%, rgba(32,191,169,.16), transparent 30%);
    }

    .hero-stage {
      border: 1px solid rgba(32, 191, 169, .14);
      border-radius: 36px;
      background:
        linear-gradient(135deg, rgba(255,255,255,.88), rgba(255,255,255,.72)),
        linear-gradient(135deg, rgba(32,191,169,.08), rgba(101,87,210,.06));
      box-shadow: 0 24px 70px rgba(32, 90, 80, .10);
      padding: 22px;
      position: relative;
      overflow: hidden;
    }

    .hero-stage::before {
      content: "";
      position: absolute;
      right: -90px;
      top: -110px;
      width: 280px;
      height: 280px;
      border-radius: 999px;
      background: rgba(32, 191, 169, .12);
      filter: blur(2px);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 22px;
      position: relative;
      z-index: 1;
      align-items: stretch;
    }

    .hero-copy {
      padding: clamp(24px, 5vw, 46px);
      min-height: 560px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .hero-intro {
      font-size: 18px;
      color: var(--muted);
      line-height: 1.9;
      max-width: 680px;
      margin-bottom: 24px;
    }

    .hero-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      margin: 18px 0 22px;
    }

    .hero-proof {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 6px;
    }

    .download-panel {
      background: rgba(255,255,255,.94);
      border: 1px solid rgba(221, 237, 234, .95);
      border-radius: 32px;
      padding: 20px;
      box-shadow: 0 18px 50px rgba(32,90,80,.10);
      align-self: stretch;
      display: grid;
      grid-template-rows: auto 1fr auto;
      gap: 16px;
      min-height: 560px;
    }

    .cover-card {
      min-height: 238px;
      border-radius: 28px;
      padding: 24px;
      color: #fff;
      background:
        radial-gradient(circle at 78% 22%, rgba(255,255,255,.25), transparent 28%),
        linear-gradient(135deg, #20BFA9 0%, #6557D2 100%);
      position: relative;
      overflow: hidden;
    }

    .cover-card::before,
    .cover-card::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.22);
    }

    .cover-card::before {
      width: 180px;
      height: 180px;
      right: -42px;
      bottom: -66px;
    }

    .cover-card::after {
      width: 90px;
      height: 90px;
      right: 60px;
      top: 38px;
    }

    .cover-top {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      position: relative;
      z-index: 1;
      margin-bottom: 34px;
    }

    .file-chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(255,255,255,.18);
      color: #fff;
      font-size: 13px;
      font-weight: 800;
    }

    .cover-card h2 {
      color: #fff;
      font-size: clamp(1.55rem, 3vw, 2.25rem);
      max-width: 420px;
      margin-bottom: 10px;
      position: relative;
      z-index: 1;
    }

    .cover-card p {
      color: rgba(255,255,255,.86);
      margin: 0;
      max-width: 420px;
      position: relative;
      z-index: 1;
    }

    .toc-box {
      padding: 18px;
      border-radius: 22px;
      background: var(--soft);
      border: 1px solid var(--line);
    }

    .toc-box h3 {
      font-size: 16px;
      margin-bottom: 12px;
    }

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

    .toc-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.55;
    }

    .toc-list i {
      color: var(--brand);
      margin-top: 2px;
    }

    .mini-lead-form {
      display: grid;
      gap: 12px;
    }

    .form-control,
    .form-select {
      min-height: 50px;
      border-radius: 16px;
      border: 1px solid var(--line);
      color: var(--ink);
      background-color: rgba(255,255,255,.90);
      padding: 12px 15px;
      box-shadow: none;
      transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
    }

    .form-control:focus,
    .form-select:focus {
      border-color: rgba(32, 191, 169, .65);
      box-shadow: 0 0 0 4px rgba(32, 191, 169, .13);
      background: #fff;
    }

    textarea.form-control {
      min-height: 116px;
      resize: vertical;
    }

    .resource-rail {
      overflow: hidden;
    }

    .rail-wrap {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 24px;
      align-items: stretch;
    }

    .rail-note {
      padding: 28px;
      border-radius: var(--radius-xl);
      background: var(--gradient-soft);
      border: 1px solid var(--line-brand);
    }

    .rail-scroller {
      display: flex;
      gap: 16px;
      overflow-x: auto;
      padding: 6px 4px 18px;
      scroll-snap-type: x mandatory;
    }

    .rail-scroller::-webkit-scrollbar {
      height: 8px;
    }

    .rail-scroller::-webkit-scrollbar-thumb {
      background: rgba(32, 191, 169, .25);
      border-radius: 999px;
    }

    .rail-card {
      min-width: 255px;
      scroll-snap-align: start;
      padding: 20px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: 0 14px 30px rgba(32, 90, 80, .06);
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .rail-card:hover {
      transform: translateY(-3px);
      border-color: rgba(32,191,169,.35);
      box-shadow: var(--shadow-hover);
    }

    .rail-icon,
    .matrix-icon,
    .metric-dot {
      width: 42px;
      height: 42px;
      border-radius: 16px;
      display: inline-grid;
      place-items: center;
      background: rgba(32, 191, 169, .10);
      color: var(--brand);
      margin-bottom: 14px;
      font-size: 20px;
    }

    .rail-card h3,
    .matrix-card h3 {
      margin-bottom: 8px;
    }

    .rail-card p,
    .matrix-card p {
      color: var(--muted);
      margin-bottom: 16px;
      font-size: 15px;
      line-height: 1.72;
    }

    .metrics-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .metric-card {
      padding: 24px;
      border-radius: 28px;
      background: rgba(255,255,255,.92);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
      min-height: 195px;
    }

    .metric-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(32, 191, 169, .32);
    }

    .metric-value {
      display: block;
      font-size: 34px;
      line-height: 1.1;
      font-weight: 850;
      letter-spacing: -.04em;
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      margin: 2px 0 8px;
    }

    .metric-card p {
      color: var(--muted);
      margin: 0 0 16px;
      font-size: 15px;
      line-height: 1.65;
    }

    .status-bar {
      margin-top: 22px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      padding: 14px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: 0 12px 30px rgba(32, 90, 80, .05);
    }

    .status-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 14px;
      border-radius: 18px;
      background: var(--soft);
      color: var(--muted);
      font-size: 14px;
      font-weight: 700;
    }

    .status-item i {
      color: var(--brand);
      font-size: 18px;
    }

    .matrix-layout {
      display: grid;
      grid-template-columns: .82fr 1.18fr;
      gap: 24px;
      align-items: start;
    }

    .matrix-feature {
      padding: 32px;
      border-radius: 32px;
      color: #fff;
      background:
        radial-gradient(circle at 72% 20%, rgba(255,255,255,.20), transparent 28%),
        var(--gradient);
      box-shadow: 0 20px 48px rgba(101,87,210,.17);
      position: sticky;
      top: 96px;
      overflow: hidden;
    }

    .matrix-feature h2,
    .matrix-feature p {
      color: #fff;
    }

    .matrix-feature p {
      color: rgba(255,255,255,.86);
      margin-bottom: 20px;
    }

    .feature-list {
      display: grid;
      gap: 12px;
      padding: 0;
      margin: 22px 0 0;
      list-style: none;
    }

    .feature-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 12px;
      border-radius: 18px;
      background: rgba(255,255,255,.14);
      color: rgba(255,255,255,.90);
      font-size: 14px;
    }

    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }

    .matrix-card {
      padding: 24px;
      border-radius: 26px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      min-height: 225px;
      position: relative;
      overflow: hidden;
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .matrix-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(32, 191, 169, .34);
    }

    .card-arrow {
      position: absolute;
      right: 20px;
      top: 20px;
      width: 34px;
      height: 34px;
      border-radius: 999px;
      display: inline-grid;
      place-items: center;
      background: rgba(32,191,169,.10);
      color: var(--brand);
      transition: transform var(--ease), background var(--ease);
    }

    .matrix-card:hover .card-arrow,
    .update-card:hover .card-arrow {
      transform: translateX(3px);
      background: rgba(32,191,169,.16);
    }

    .compare-shell {
      border-radius: 34px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .compare-top {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
      border-bottom: 1px solid var(--line);
    }

    .compare-title {
      padding: 24px 28px;
      background: #F7FAF9;
    }

    .compare-title.strong {
      color: #fff;
      background: var(--gradient);
    }

    .compare-title h3 {
      margin: 0 0 6px;
    }

    .compare-title.strong h3,
    .compare-title.strong p {
      color: #fff;
    }

    .compare-title p {
      color: var(--muted);
      margin: 0;
      font-size: 14px;
    }

    .compare-row {
      display: grid;
      grid-template-columns: 180px 1fr 1fr;
      gap: 0;
      border-bottom: 1px solid var(--line);
    }

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

    .compare-label,
    .compare-cell {
      padding: 18px 22px;
      display: flex;
      align-items: center;
      min-height: 78px;
    }

    .compare-label {
      font-weight: 800;
      background: var(--soft);
      color: var(--ink);
    }

    .compare-cell {
      color: var(--muted);
      border-left: 1px solid var(--line);
    }

    .compare-cell.good {
      color: var(--ink);
      background: rgba(32,191,169,.045);
    }

    .compare-cell i {
      margin-right: 10px;
      color: var(--brand);
      font-size: 18px;
      flex: 0 0 auto;
    }

    .updates-area {
      background: linear-gradient(180deg, rgba(238,247,245,.70), rgba(255,255,255,.70));
    }

    .updates-layout {
      display: grid;
      grid-template-columns: .78fr 1.22fr;
      gap: 26px;
      align-items: start;
    }

    .updates-aside {
      padding: 28px;
      border-radius: 30px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      position: sticky;
      top: 96px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

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

    .update-card {
      display: block;
      position: relative;
      padding: 22px 58px 22px 22px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: 0 12px 28px rgba(32, 90, 80, .05);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease), background var(--ease);
    }

    .update-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(32, 191, 169, .34);
      background: #FEFFFF;
    }

    .update-card h3 {
      font-size: 19px;
      line-height: 1.38;
      margin: 10px 0 8px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      color: var(--ink);
    }

    .update-card p {
      color: var(--muted);
      font-size: 15px;
      line-height: 1.7;
      margin: 0 0 12px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

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

    .empty-state {
      padding: 42px 28px;
      border-radius: 28px;
      background: #fff;
      border: 1px dashed rgba(32, 191, 169, .35);
      text-align: center;
      box-shadow: var(--shadow);
    }

    .empty-state i {
      font-size: 44px;
      color: var(--brand);
      margin-bottom: 14px;
    }

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

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

    .collection-card {
      padding: 24px;
      border-radius: 28px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      min-height: 230px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .collection-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(32,191,169,.34);
    }

    .collection-count {
      font-size: 38px;
      font-weight: 850;
      letter-spacing: -.04em;
      color: var(--brand);
      line-height: 1;
      margin-bottom: 10px;
    }

    .media-strip {
      display: flex;
      gap: 18px;
      overflow-x: auto;
      padding: 6px 4px 18px;
      scroll-snap-type: x mandatory;
    }

    .media-card {
      min-width: 310px;
      scroll-snap-align: start;
      border-radius: 28px;
      background: #fff;
      border: 1px solid var(--line);
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .media-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(32,191,169,.34);
    }

    .media-thumb {
      height: 145px;
      background:
        linear-gradient(135deg, rgba(32,191,169,.18), rgba(101,87,210,.16)),
        repeating-linear-gradient(135deg, rgba(255,255,255,.55) 0 12px, rgba(255,255,255,.28) 12px 24px);
      display: grid;
      place-items: center;
      color: var(--brand-2);
      font-size: 34px;
    }

    .media-body {
      padding: 20px;
    }

    .media-body p {
      color: var(--muted);
      font-size: 15px;
      margin-bottom: 0;
    }

    .faq-layout {
      display: grid;
      grid-template-columns: .82fr 1.18fr;
      gap: 26px;
      align-items: start;
    }

    .faq-summary {
      padding: 30px;
      border-radius: 32px;
      background: var(--gradient-soft);
      border: 1px solid var(--line-brand);
      position: sticky;
      top: 96px;
    }

    .faq-stat {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 20px;
    }

    .faq-stat div {
      padding: 16px;
      border-radius: 20px;
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(255,255,255,.65);
    }

    .faq-stat strong {
      display: block;
      font-size: 26px;
      color: var(--brand);
      line-height: 1;
      margin-bottom: 8px;
    }

    .accordion-item {
      border: 1px solid var(--line);
      border-radius: 22px !important;
      overflow: hidden;
      margin-bottom: 14px;
      background: #fff;
      box-shadow: 0 10px 26px rgba(32, 90, 80, .045);
    }

    .accordion-button {
      min-height: 68px;
      border-radius: 22px !important;
      color: var(--ink);
      font-weight: 800;
      background: #fff;
      box-shadow: none;
      padding: 20px 22px;
      gap: 10px;
    }

    .accordion-button:not(.collapsed) {
      color: var(--ink);
      background: rgba(32, 191, 169, .075);
      box-shadow: inset 4px 0 0 var(--brand);
    }

    .accordion-button::after {
      width: 34px;
      height: 34px;
      border-radius: 999px;
      background-color: rgba(32, 191, 169, .10);
      background-position: center;
      background-size: 16px;
      transition: transform var(--ease), background-color var(--ease);
    }

    .accordion-button:hover::after {
      background-color: rgba(32, 191, 169, .16);
    }

    .accordion-body {
      color: var(--muted);
      line-height: 1.85;
      padding: 0 22px 22px 26px;
      background: rgba(255,255,255,.96);
    }

    .lead-panel {
      border-radius: 34px;
      background:
        radial-gradient(circle at 82% 18%, rgba(255,255,255,.25), transparent 24%),
        linear-gradient(135deg, rgba(32,191,169,.95), rgba(101,87,210,.95));
      padding: 10px;
      box-shadow: 0 24px 62px rgba(101, 87, 210, .18);
    }

    .lead-panel-inner {
      border-radius: 28px;
      background: rgba(255,255,255,.94);
      padding: 28px;
      border: 1px solid rgba(255,255,255,.65);
    }

    .lead-form-grid {
      display: grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 24px;
      align-items: start;
    }

    .form-label {
      color: var(--ink);
      font-weight: 800;
      margin-bottom: 8px;
      font-size: 14px;
    }

    .form-hint {
      color: var(--muted);
      font-size: 13px;
      line-height: 1.6;
      margin-top: 8px;
    }

    .tip-card {
      padding: 22px;
      border-radius: 24px;
      background: var(--soft);
      border: 1px solid var(--line);
      margin-bottom: 14px;
    }

    .tip-card h3 {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      margin-bottom: 10px;
    }

    .tip-card h3 i {
      color: var(--brand);
    }

    .tip-card p,
    .tip-card li {
      color: var(--muted);
      font-size: 15px;
      line-height: 1.75;
    }

    .tip-card ul {
      padding-left: 1.1rem;
      margin-bottom: 0;
    }

    .progress-check {
      padding: 26px;
      border-radius: 30px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .progress {
      height: 12px;
      border-radius: 999px;
      background: rgba(32, 191, 169, .10);
      overflow: hidden;
      margin: 16px 0 18px;
    }

    .progress-bar {
      background: var(--gradient);
      border-radius: 999px;
    }

    .check-list {
      display: grid;
      gap: 12px;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .check-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.65;
    }

    .check-list i {
      color: var(--brand);
      margin-top: 2px;
      flex: 0 0 auto;
    }

    .site-footer {
      padding: 54px 0 28px;
      background:
        linear-gradient(180deg, rgba(238,247,245,.72), rgba(238,247,245,.96)),
        radial-gradient(circle at 16% 18%, rgba(32,191,169,.14), transparent 28%);
      border-top: 1px solid rgba(221, 237, 234, .95);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr .9fr;
      gap: 28px;
      align-items: start;
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 850;
      color: var(--ink);
      margin-bottom: 14px;
    }

    .footer-brand .brand-mark {
      width: 36px;
      height: 36px;
    }

    .footer-desc {
      color: var(--muted);
      margin: 0;
      max-width: 460px;
      line-height: 1.85;
    }

    .footer-title {
      font-weight: 850;
      margin-bottom: 14px;
      color: var(--ink);
    }

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

    .footer-links a {
      color: var(--muted);
      font-weight: 650;
    }

    .footer-links a:hover {
      color: var(--brand);
      padding-left: 3px;
    }

    .copyright {
      margin-top: 34px;
      padding-top: 20px;
      border-top: 1px solid rgba(36,49,47,.08);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
      color: #7b8b87;
      font-size: 13px;
    }

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

    .text-link i {
      transition: transform var(--ease);
    }

    .text-link:hover i {
      transform: translateX(3px);
    }

    @media (max-width: 1199.98px) {
      :root {
        --container: 1080px;
      }

      .search-pill {
        width: 230px;
      }

      .hero-copy,
      .download-panel {
        min-height: 520px;
      }

      .metrics-strip,
      .status-bar {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 991.98px) {
      .navbar-collapse {
        padding: 16px 0 10px;
      }

      .nav-actions {
        align-items: stretch;
        margin-left: 0;
        margin-top: 12px;
        flex-direction: column;
      }

      .search-pill {
        width: 100%;
      }

      .hero {
        padding-top: 34px;
      }

      .hero-grid,
      .rail-wrap,
      .matrix-layout,
      .updates-layout,
      .faq-layout,
      .lead-form-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .hero-copy,
      .download-panel {
        min-height: auto;
      }

      .matrix-feature,
      .updates-aside,
      .faq-summary {
        position: static;
      }

      .compare-row {
        grid-template-columns: 145px 1fr 1fr;
      }

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

      .section {
        padding: 68px 0;
      }

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

    @media (max-width: 767.98px) {
      .navbar {
        min-height: 64px;
      }

      .brand-text {
        font-size: 17px;
      }

      .hero-stage {
        border-radius: 28px;
        padding: 12px;
      }

      .hero-copy {
        padding: 24px 18px;
      }

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

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

      .download-panel,
      .cover-card {
        border-radius: 24px;
      }

      .metrics-strip,
      .status-bar,
      .matrix-grid,
      .collection-grid {
        grid-template-columns: 1fr;
      }

      .status-bar {
        padding: 10px;
      }

      .compare-shell {
        border-radius: 26px;
      }

      .compare-top {
        grid-template-columns: 1fr;
      }

      .compare-row {
        grid-template-columns: 1fr;
      }

      .compare-label,
      .compare-cell {
        border-left: 0;
        border-top: 1px solid var(--line);
        min-height: auto;
      }

      .compare-label {
        border-top: 0;
      }

      .update-card {
        padding-right: 22px;
      }

      .update-card .card-arrow {
        position: static;
        margin-top: 10px;
      }

      .media-card {
        min-width: 270px;
      }

      .lead-panel-inner {
        padding: 20px;
      }

      .copyright {
        display: block;
      }

      .copyright span {
        display: block;
        margin-bottom: 8px;
      }
    }

    @media (max-width: 479.98px) {
      h1 {
        font-size: 2rem;
      }

      .section {
        padding: 54px 0;
      }

      .cover-top,
      .meta-row {
        align-items: flex-start;
      }

      .badge-soft {
        white-space: normal;
        line-height: 1.35;
      }

      .btn {
        width: 100%;
        justify-content: center;
      }

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

/* roulang page: article */
:root {
      --brand: #20BFA9;
      --brand-2: #6557D2;
      --accent: #FF8A5C;
      --ink: #24312F;
      --muted: #667772;
      --soft: #F5FBF9;
      --soft-2: #EEF7F5;
      --card: #FFFFFF;
      --line: #DDEDEA;
      --line-brand: rgba(32, 191, 169, .18);
      --shadow: 0 16px 40px rgba(32, 90, 80, .08);
      --shadow-hover: 0 22px 54px rgba(32, 90, 80, .13);
      --radius-xl: 30px;
      --radius-lg: 24px;
      --radius-md: 18px;
      --radius-sm: 14px;
      --container: 1200px;
      --ease: 220ms ease;
      --gradient: linear-gradient(135deg, #20BFA9 0%, #6557D2 100%);
      --gradient-soft: linear-gradient(135deg, rgba(32,191,169,.13), rgba(101,87,210,.10));
      --orange-soft: rgba(255,138,92,.13);
      --font: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font);
      color: var(--ink);
      background:
        radial-gradient(circle at 10% 0%, rgba(32,191,169,.13), transparent 32%),
        radial-gradient(circle at 85% 5%, rgba(101,87,210,.11), transparent 34%),
        linear-gradient(180deg, #F7FCFB 0%, #FFFFFF 42%, #F5FBF9 100%);
      line-height: 1.75;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a:hover {
      color: var(--brand-2);
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
      outline: 4px solid rgba(32, 191, 169, .18);
      outline-offset: 3px;
    }

    img,
    svg {
      max-width: 100%;
      height: auto;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
    }

    .container-fluid,
    .container {
      max-width: var(--container);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, .82);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(221, 237, 234, .82);
      transition: box-shadow var(--ease), background var(--ease);
    }

    .navbar {
      min-height: 70px;
      padding: 10px 0;
    }

    .navbar-brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      color: var(--ink);
      letter-spacing: -.02em;
      margin-right: 28px;
    }

    .navbar-brand:hover {
      color: var(--ink);
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 15px;
      display: inline-grid;
      place-items: center;
      color: #fff;
      background: var(--gradient);
      box-shadow: 0 10px 28px rgba(32, 191, 169, .22);
      position: relative;
      overflow: hidden;
      flex: 0 0 auto;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      inset: 8px 6px 8px 12px;
      background: rgba(255, 255, 255, .25);
      clip-path: polygon(0 0, 100% 50%, 0 100%);
    }

    .brand-text {
      font-size: 19px;
    }

    .navbar-nav .nav-link {
      color: var(--muted);
      font-weight: 650;
      padding: 10px 14px;
      border-radius: 999px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--ink);
      background: rgba(32, 191, 169, .09);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: auto;
    }

    .search-pill {
      width: 285px;
      height: 46px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.88);
      border-radius: 999px;
      display: flex;
      align-items: center;
      padding: 0 12px 0 16px;
      gap: 8px;
      box-shadow: 0 10px 22px rgba(32, 90, 80, .04);
      transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
    }

    .search-pill:focus-within {
      border-color: rgba(32, 191, 169, .55);
      box-shadow: 0 0 0 4px rgba(32, 191, 169, .12);
      background: #fff;
    }

    .search-pill i {
      color: var(--brand);
      font-size: 16px;
    }

    .search-pill input {
      border: 0;
      outline: none;
      width: 100%;
      background: transparent;
      color: var(--ink);
      font-size: 14px;
    }

    .search-pill input::placeholder {
      color: #8a9a96;
    }

    .btn {
      min-height: 46px;
      border-radius: 999px;
      padding: 11px 20px;
      font-weight: 750;
      border: 1px solid transparent;
      letter-spacing: .01em;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
    }

    .btn:active {
      transform: translateY(1px);
    }

    .btn-primary {
      background: var(--gradient);
      border: 0;
      color: #fff;
      box-shadow: 0 14px 30px rgba(32, 191, 169, .22);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 18px 40px rgba(101, 87, 210, .22);
    }

    .btn-outline-primary {
      color: var(--ink);
      border-color: rgba(32, 191, 169, .30);
      background: rgba(255,255,255,.74);
    }

    .btn-outline-primary:hover,
    .btn-outline-primary:focus {
      color: var(--ink);
      border-color: rgba(32, 191, 169, .55);
      background: rgba(32, 191, 169, .10);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(32, 90, 80, .07);
    }

    .btn-accent {
      background: linear-gradient(135deg, #FF8A5C 0%, #FFB06F 100%);
      color: #fff;
      border: 0;
      box-shadow: 0 14px 28px rgba(255, 138, 92, .23);
    }

    .btn-accent:hover,
    .btn-accent:focus {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(255, 138, 92, .30);
    }

    .navbar-toggler {
      border: 1px solid var(--line);
      border-radius: 14px;
      width: 46px;
      height: 42px;
      box-shadow: none;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 4px rgba(32, 191, 169, .16);
    }

    .section {
      padding: 86px 0;
      position: relative;
    }

    .section-compact {
      padding: 66px 0;
    }

    .section-head {
      margin-bottom: 30px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(32, 191, 169, .10);
      color: #159f8d;
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .eyebrow i {
      font-size: 15px;
    }

    .section-title {
      font-size: clamp(26px, 3vw, 38px);
      line-height: 1.18;
      font-weight: 850;
      letter-spacing: -.04em;
      margin: 0 0 12px;
      color: var(--ink);
    }

    .section-desc {
      color: var(--muted);
      font-size: 16px;
      line-height: 1.8;
      margin: 0;
      max-width: 720px;
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 30px;
      padding: 5px 10px;
      border-radius: 999px;
      background: rgba(32, 191, 169, .10);
      color: #159f8d;
      font-size: 13px;
      font-weight: 750;
      border: 1px solid rgba(32, 191, 169, .12);
    }

    .badge-orange {
      background: var(--orange-soft);
      color: #d86637;
      border-color: rgba(255, 138, 92, .18);
    }

    .badge-purple {
      background: rgba(101, 87, 210, .10);
      color: #584bc2;
      border-color: rgba(101, 87, 210, .14);
    }

    .card,
    .soft-card {
      border: 1px solid var(--line-brand);
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.88);
      box-shadow: var(--shadow);
    }

    .soft-card {
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease), background var(--ease);
    }

    .soft-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(32, 191, 169, .34);
      background: #fff;
    }

    .article-hero {
      padding: 58px 0 34px;
      background:
        linear-gradient(135deg, rgba(32,191,169,.10), rgba(101,87,210,.08)),
        radial-gradient(circle at 88% 15%, rgba(255,138,92,.14), transparent 28%);
      border-bottom: 1px solid rgba(221, 237, 234, .8);
    }

    .breadcrumb {
      --bs-breadcrumb-divider-color: #93a39f;
      margin-bottom: 22px;
      gap: 3px;
      flex-wrap: nowrap;
      overflow-x: auto;
      scrollbar-width: none;
    }

    .breadcrumb::-webkit-scrollbar {
      display: none;
    }

    .breadcrumb-item,
    .breadcrumb-item a {
      color: var(--muted);
      font-size: 14px;
      white-space: nowrap;
      font-weight: 650;
    }

    .breadcrumb-item a:hover {
      color: var(--brand);
    }

    .breadcrumb-item.active {
      color: var(--ink);
      max-width: 420px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-title-card {
      position: relative;
      padding: 36px;
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, .86);
      border: 1px solid rgba(32,191,169,.16);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .article-title-card::before {
      content: "";
      position: absolute;
      inset: 0 0 auto;
      height: 7px;
      background: var(--gradient);
    }

    .article-labels {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 18px;
    }

    .article-title {
      font-size: clamp(30px, 4.2vw, 52px);
      line-height: 1.16;
      font-weight: 880;
      letter-spacing: -.055em;
      color: var(--ink);
      margin: 0 0 18px;
    }

    .article-summary {
      color: var(--muted);
      font-size: 17px;
      line-height: 1.88;
      max-width: 920px;
      margin: 0;
    }

    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
      color: var(--muted);
      font-size: 14px;
    }

    .article-meta span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(245, 251, 249, .9);
      border: 1px solid rgba(221, 237, 234, .92);
    }

    .cover-wrap {
      padding: 34px 0 0;
    }

    .article-cover {
      min-height: 360px;
      border-radius: var(--radius-xl);
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      background:
        linear-gradient(135deg, rgba(36,49,47,.72), rgba(36,49,47,.28)),
        radial-gradient(circle at 20% 18%, rgba(32,191,169,.75), transparent 28%),
        radial-gradient(circle at 80% 24%, rgba(101,87,210,.72), transparent 30%),
        linear-gradient(135deg, #153b37, #292560);
      isolation: isolate;
    }

    .article-cover::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
      background-size: 46px 46px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,.8), rgba(0,0,0,.25));
      z-index: 0;
    }

    .cover-content {
      position: relative;
      z-index: 1;
      min-height: 360px;
      padding: 36px;
      display: grid;
      grid-template-columns: 1fr 340px;
      gap: 28px;
      align-items: end;
      color: #fff;
    }

    .cover-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(255,255,255,.14);
      border: 1px solid rgba(255,255,255,.18);
      backdrop-filter: blur(8px);
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .cover-title {
      font-size: clamp(24px, 3vw, 38px);
      line-height: 1.2;
      font-weight: 850;
      letter-spacing: -.04em;
      margin: 0 0 12px;
      max-width: 720px;
    }

    .cover-desc {
      color: rgba(255,255,255,.82);
      margin: 0;
      max-width: 700px;
    }

    .play-panel {
      background: rgba(255,255,255,.14);
      border: 1px solid rgba(255,255,255,.22);
      border-radius: 26px;
      padding: 22px;
      backdrop-filter: blur(16px);
    }

    .play-button {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      border: 0;
      background: #fff;
      color: var(--brand-2);
      display: inline-grid;
      place-items: center;
      font-size: 28px;
      box-shadow: 0 18px 36px rgba(0,0,0,.18);
      margin-bottom: 16px;
      transition: transform var(--ease), box-shadow var(--ease);
    }

    .play-button:hover {
      transform: scale(1.04);
      box-shadow: 0 22px 44px rgba(0,0,0,.24);
    }

    .play-panel-title {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .play-panel p {
      color: rgba(255,255,255,.78);
      font-size: 14px;
      margin-bottom: 16px;
      line-height: 1.7;
    }

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

    .mini-stat {
      padding: 13px 14px;
      border-radius: 18px;
      background: rgba(255,255,255,.14);
      border: 1px solid rgba(255,255,255,.16);
      color: #fff;
      line-height: 1.35;
    }

    .mini-stat strong {
      display: block;
      font-size: 17px;
      font-weight: 850;
    }

    .mini-stat span {
      color: rgba(255,255,255,.75);
      font-size: 12px;
    }

    .article-main {
      padding-top: 54px;
      padding-bottom: 70px;
    }

    .reader-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 340px;
      gap: 28px;
      align-items: start;
    }

    .article-card {
      padding: 42px 44px;
      border-radius: var(--radius-xl);
      background: #fff;
      border: 1px solid rgba(32,191,169,.16);
      box-shadow: var(--shadow);
      min-width: 0;
      overflow-x: auto;
    }

    .pull-quote {
      position: relative;
      margin: 0 0 34px;
      padding: 24px 26px 24px 28px;
      border-radius: 22px;
      background: linear-gradient(135deg, rgba(32,191,169,.10), rgba(101,87,210,.07));
      border: 1px solid rgba(32,191,169,.18);
      color: var(--ink);
      font-size: 18px;
      line-height: 1.85;
      font-weight: 700;
    }

    .pull-quote::before {
      content: "";
      position: absolute;
      left: 0;
      top: 20px;
      bottom: 20px;
      width: 5px;
      border-radius: 999px;
      background: var(--gradient);
    }

    .article-content {
      color: #31403d;
      font-size: 17px;
      line-height: 1.9;
      overflow-x: auto;
    }

    .article-content h2 {
      font-size: 30px;
      line-height: 1.25;
      font-weight: 850;
      letter-spacing: -.035em;
      margin: 2.2em 0 .75em;
      color: var(--ink);
      padding-top: .15em;
    }

    .article-content h3 {
      font-size: 23px;
      line-height: 1.35;
      font-weight: 820;
      margin: 1.8em 0 .7em;
      color: var(--ink);
    }

    .article-content h4 {
      font-size: 19px;
      font-weight: 800;
      margin: 1.5em 0 .65em;
      color: var(--ink);
    }

    .article-content p {
      margin: 0 0 1.12em;
    }

    .article-content a {
      color: #159f8d;
      font-weight: 700;
      border-bottom: 1px solid rgba(32,191,169,.24);
    }

    .article-content a:hover {
      color: var(--brand-2);
      border-bottom-color: rgba(101,87,210,.35);
    }

    .article-content ul,
    .article-content ol {
      margin: .8em 0 1.25em;
      padding-left: 1.45em;
    }

    .article-content li {
      margin-bottom: .45em;
      padding-left: .2em;
    }

    .article-content blockquote {
      margin: 1.6em 0;
      padding: 20px 22px;
      border-left: 5px solid var(--brand);
      border-radius: 18px;
      background: rgba(32,191,169,.08);
      color: #334743;
      font-weight: 650;
    }

    .article-content figure {
      margin: 1.8em 0;
    }

    .article-content img {
      display: block;
      width: auto;
      max-width: 100%;
      border-radius: 20px;
      box-shadow: 0 16px 36px rgba(32, 90, 80, .09);
      border: 1px solid rgba(221,237,234,.9);
    }

    .article-content figcaption {
      margin-top: 10px;
      color: var(--muted);
      font-size: 14px;
      text-align: center;
    }

    .article-content table {
      width: 100%;
      min-width: 640px;
      border-collapse: separate;
      border-spacing: 0;
      margin: 1.5em 0;
      overflow: hidden;
      border-radius: 18px;
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: 0 12px 28px rgba(32,90,80,.06);
    }

    .article-content th,
    .article-content td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--line);
      vertical-align: top;
    }

    .article-content th {
      background: rgba(32,191,169,.09);
      color: var(--ink);
      font-weight: 820;
    }

    .article-content tr:last-child td {
      border-bottom: 0;
    }

    .article-content code {
      padding: .2em .42em;
      border-radius: 8px;
      background: rgba(101,87,210,.08);
      color: #5447bd;
      font-size: .92em;
    }

    .article-content pre {
      padding: 18px;
      border-radius: 18px;
      background: #182724;
      color: #e8fff9;
      overflow-x: auto;
      line-height: 1.7;
      margin: 1.5em 0;
    }

    .article-content pre code {
      background: transparent;
      color: inherit;
      padding: 0;
    }

    .article-content hr {
      border: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(32,191,169,.35), transparent);
      margin: 2.1em 0;
      opacity: 1;
    }

    .not-found {
      text-align: center;
      padding: 54px 18px;
    }

    .not-found-icon {
      width: 76px;
      height: 76px;
      border-radius: 26px;
      display: inline-grid;
      place-items: center;
      background: var(--gradient-soft);
      color: var(--brand);
      font-size: 34px;
      margin-bottom: 18px;
    }

    .not-found h2 {
      font-size: 28px;
      font-weight: 850;
      margin-bottom: 10px;
    }

    .not-found p {
      color: var(--muted);
      margin-bottom: 22px;
    }

    .side-stack {
      position: sticky;
      top: 96px;
      display: grid;
      gap: 18px;
    }

    .side-card {
      padding: 22px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.9);
      border: 1px solid rgba(32,191,169,.15);
      box-shadow: var(--shadow);
    }

    .side-title {
      display: flex;
      align-items: center;
      gap: 9px;
      font-size: 18px;
      font-weight: 850;
      margin-bottom: 13px;
      color: var(--ink);
    }

    .side-title i {
      width: 34px;
      height: 34px;
      border-radius: 13px;
      display: inline-grid;
      place-items: center;
      background: rgba(32,191,169,.10);
      color: var(--brand);
    }

    .hint-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .hint-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .hint-list i {
      color: var(--brand);
      margin-top: 3px;
    }

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

    .related-item {
      display: block;
      padding: 15px;
      border-radius: 18px;
      border: 1px solid rgba(221,237,234,.92);
      background: rgba(245,251,249,.68);
      color: var(--ink);
      transition: transform var(--ease), border-color var(--ease), background var(--ease), box-shadow var(--ease);
    }

    .related-item:hover {
      transform: translateY(-2px);
      border-color: rgba(32,191,169,.32);
      background: #fff;
      box-shadow: 0 14px 28px rgba(32,90,80,.07);
      color: var(--ink);
    }

    .related-item strong {
      display: block;
      font-size: 15px;
      line-height: 1.55;
      margin-bottom: 7px;
    }

    .related-meta {
      display: flex;
      justify-content: space-between;
      gap: 10px;
      color: var(--muted);
      font-size: 12px;
    }

    .guide-strip {
      background: linear-gradient(135deg, rgba(32,191,169,.11), rgba(101,87,210,.08));
      border-top: 1px solid rgba(221,237,234,.72);
      border-bottom: 1px solid rgba(221,237,234,.72);
    }

    .guide-grid {
      display: grid;
      grid-template-columns: 1.05fr 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .data-tile {
      padding: 26px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.82);
      border: 1px solid rgba(32,191,169,.16);
      box-shadow: var(--shadow);
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .data-icon {
      width: 48px;
      height: 48px;
      border-radius: 18px;
      display: inline-grid;
      place-items: center;
      background: var(--gradient);
      color: #fff;
      box-shadow: 0 12px 26px rgba(32,191,169,.20);
      flex: 0 0 auto;
      font-size: 21px;
    }

    .data-tile h2,
    .data-tile h3 {
      font-size: 22px;
      font-weight: 850;
      margin: 0 0 8px;
      letter-spacing: -.025em;
    }

    .data-tile p {
      margin: 0;
      color: var(--muted);
      line-height: 1.78;
    }

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

    .check-item {
      padding: 18px;
      border-radius: 20px;
      background: #fff;
      border: 1px solid rgba(32,191,169,.15);
      box-shadow: 0 12px 26px rgba(32,90,80,.055);
    }

    .check-item i {
      color: var(--brand);
      font-size: 20px;
      margin-bottom: 8px;
    }

    .check-item strong {
      display: block;
      font-size: 16px;
      margin-bottom: 5px;
    }

    .check-item span {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.6;
    }

    .updates-panel {
      border-radius: var(--radius-xl);
      background: #fff;
      border: 1px solid rgba(32,191,169,.16);
      box-shadow: var(--shadow);
      padding: 28px;
    }

    .update-row {
      display: grid;
      grid-template-columns: 96px minmax(0, 1fr) auto;
      gap: 18px;
      align-items: center;
      padding: 18px 0;
      border-bottom: 1px solid rgba(221,237,234,.75);
    }

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

    .update-date {
      display: inline-flex;
      justify-content: center;
      align-items: center;
      min-height: 38px;
      padding: 7px 11px;
      border-radius: 999px;
      color: #159f8d;
      background: rgba(32,191,169,.10);
      font-weight: 800;
      font-size: 13px;
      white-space: nowrap;
    }

    .update-row h3 {
      font-size: 18px;
      line-height: 1.45;
      margin: 0 0 4px;
      font-weight: 820;
    }

    .update-row p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.6;
    }

    .arrow-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--brand);
      font-weight: 800;
      white-space: nowrap;
    }

    .arrow-link i {
      transition: transform var(--ease);
    }

    .arrow-link:hover i {
      transform: translateX(3px);
    }

    .faq-wrap {
      display: grid;
      grid-template-columns: 360px minmax(0, 1fr);
      gap: 28px;
      align-items: start;
    }

    .faq-summary {
      padding: 28px;
      border-radius: var(--radius-xl);
      background: var(--gradient);
      color: #fff;
      box-shadow: 0 18px 42px rgba(101,87,210,.18);
      position: sticky;
      top: 96px;
      overflow: hidden;
    }

    .faq-summary::after {
      content: "";
      position: absolute;
      right: -40px;
      bottom: -60px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(255,255,255,.13);
    }

    .faq-summary h2 {
      font-size: 28px;
      font-weight: 850;
      margin-bottom: 12px;
      position: relative;
      z-index: 1;
    }

    .faq-summary p {
      color: rgba(255,255,255,.82);
      margin-bottom: 18px;
      position: relative;
      z-index: 1;
    }

    .faq-summary .badge-soft {
      background: rgba(255,255,255,.18);
      border-color: rgba(255,255,255,.22);
      color: #fff;
      position: relative;
      z-index: 1;
    }

    .accordion {
      display: grid;
      gap: 14px;
    }

    .accordion-item {
      border: 1px solid rgba(32,191,169,.16);
      border-radius: 22px !important;
      background: rgba(255,255,255,.9);
      overflow: hidden;
      box-shadow: 0 12px 28px rgba(32,90,80,.055);
    }

    .accordion-button {
      min-height: 64px;
      border-radius: 22px !important;
      padding: 18px 22px;
      background: transparent;
      color: var(--ink);
      font-weight: 820;
      font-size: 16px;
      box-shadow: none;
    }

    .accordion-button:hover {
      background: rgba(32,191,169,.055);
    }

    .accordion-button:not(.collapsed) {
      color: var(--ink);
      background: linear-gradient(135deg, rgba(32,191,169,.11), rgba(101,87,210,.06));
      box-shadow: none;
    }

    .accordion-button:focus {
      box-shadow: 0 0 0 4px rgba(32,191,169,.14);
      border-color: transparent;
    }

    .accordion-button::after {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      background-color: rgba(32,191,169,.10);
      background-position: center;
      background-size: 16px;
    }

    .accordion-body {
      padding: 0 22px 20px;
      color: var(--muted);
      line-height: 1.8;
    }

    .lead-panel {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(32,191,169,.12), rgba(101,87,210,.10)),
        #fff;
      border: 1px solid rgba(32,191,169,.16);
      box-shadow: var(--shadow-hover);
      padding: 34px;
    }

    .lead-panel::before {
      content: "";
      position: absolute;
      right: -70px;
      top: -80px;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      background: rgba(255,138,92,.15);
    }

    .form-label {
      font-weight: 780;
      color: var(--ink);
      margin-bottom: 7px;
    }

    .form-control,
    .form-select {
      min-height: 50px;
      border-radius: 16px;
      border: 1px solid rgba(221,237,234,.95);
      background-color: rgba(255,255,255,.9);
      color: var(--ink);
      padding: 11px 14px;
      box-shadow: none;
      transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
    }

    textarea.form-control {
      min-height: 116px;
      resize: vertical;
    }

    .form-control:focus,
    .form-select:focus {
      border-color: rgba(32,191,169,.58);
      box-shadow: 0 0 0 4px rgba(32,191,169,.13);
      background: #fff;
    }

    .form-control::placeholder {
      color: #91a09c;
    }

    .submit-note {
      padding: 18px;
      border-radius: 20px;
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(32,191,169,.16);
      color: var(--muted);
      font-size: 14px;
      line-height: 1.75;
    }

    .site-footer {
      padding: 58px 0 26px;
      background:
        radial-gradient(circle at 12% 18%, rgba(32,191,169,.10), transparent 28%),
        linear-gradient(180deg, #EEF7F5 0%, #F7FCFB 100%);
      border-top: 1px solid rgba(221,237,234,.9);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.2fr) .6fr .7fr;
      gap: 42px;
      align-items: start;
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--ink);
      font-weight: 850;
      font-size: 20px;
      margin-bottom: 14px;
    }

    .footer-brand:hover {
      color: var(--ink);
    }

    .footer-desc {
      color: var(--muted);
      max-width: 520px;
      margin: 0;
      line-height: 1.8;
    }

    .footer-title {
      color: var(--ink);
      font-weight: 850;
      margin-bottom: 12px;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 8px;
    }

    .footer-links a {
      color: var(--muted);
      font-weight: 650;
    }

    .footer-links a:hover {
      color: var(--brand);
      padding-left: 3px;
    }

    .copyright {
      margin-top: 38px;
      padding-top: 22px;
      border-top: 1px solid rgba(221,237,234,.92);
      display: flex;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
      color: #7a8b87;
      font-size: 13px;
    }

    @media (max-width: 1199.98px) {
      :root {
        --container: 1080px;
      }

      .search-pill {
        width: 235px;
      }

      .reader-layout {
        grid-template-columns: minmax(0, 1fr) 310px;
      }

      .cover-content {
        grid-template-columns: 1fr 300px;
      }
    }

    @media (max-width: 991.98px) {
      .navbar {
        min-height: 64px;
      }

      .navbar-collapse {
        padding: 14px 0 10px;
      }

      .navbar-nav .nav-link {
        width: 100%;
      }

      .nav-actions {
        width: 100%;
        align-items: stretch;
        flex-direction: column;
        margin-left: 0;
        padding-top: 8px;
      }

      .search-pill {
        width: 100%;
      }

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

      .article-hero {
        padding-top: 42px;
      }

      .article-title-card {
        padding: 30px;
      }

      .cover-content {
        grid-template-columns: 1fr;
        align-items: center;
      }

      .play-panel {
        max-width: 520px;
      }

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

      .side-stack,
      .faq-summary {
        position: static;
      }

      .guide-grid,
      .faq-wrap {
        grid-template-columns: 1fr;
      }

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

    @media (max-width: 767.98px) {
      .section {
        padding: 58px 0;
      }

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

      .article-title-card {
        padding: 26px 22px;
        border-radius: 24px;
      }

      .article-title {
        font-size: 32px;
      }

      .article-summary {
        font-size: 16px;
      }

      .cover-wrap {
        padding-top: 22px;
      }

      .article-cover {
        min-height: auto;
        border-radius: 24px;
      }

      .cover-content {
        min-height: auto;
        padding: 26px 22px;
      }

      .mini-stats {
        grid-template-columns: 1fr;
      }

      .article-main {
        padding-top: 38px;
        padding-bottom: 54px;
      }

      .article-card {
        padding: 26px 22px;
        border-radius: 24px;
      }

      .pull-quote {
        padding: 20px 20px 20px 24px;
        font-size: 16px;
      }

      .article-content {
        font-size: 16px;
      }

      .article-content h2 {
        font-size: 25px;
      }

      .article-content h3 {
        font-size: 21px;
      }

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

      .update-row {
        grid-template-columns: 1fr;
        gap: 8px;
        align-items: start;
      }

      .lead-panel {
        padding: 24px 20px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 26px;
      }

      .copyright {
        flex-direction: column;
        gap: 8px;
      }
    }

    @media (max-width: 479.98px) {
      .brand-text {
        font-size: 18px;
      }

      .article-title {
        font-size: 29px;
      }

      .article-labels,
      .article-meta {
        gap: 8px;
      }

      .btn {
        width: 100%;
      }

      .cover-content {
        padding: 22px 18px;
      }

      .play-button {
        width: 64px;
        height: 64px;
      }

      .data-tile {
        flex-direction: column;
      }

      .breadcrumb-item.active {
        max-width: 260px;
      }
    }