/* roulang page: index */
:root {
      --bg: #07111f;
      --bg-2: #0a1628;
      --panel: rgba(8, 18, 36, .68);
      --panel-strong: rgba(10, 28, 52, .78);
      --line: rgba(56, 213, 255, .22);
      --line-strong: rgba(139, 92, 246, .36);
      --text: #eef6ff;
      --muted: #c8d3e6;
      --subtle: #8fa4bf;
      --arc: #38d5ff;
      --violet: #8b5cf6;
      --gold: #d6a84f;
      --warning: #f7b955;
      --danger: #fb7185;
      --radius-xl: 24px;
      --radius-lg: 18px;
      --radius-md: 14px;
      --shadow: 0 26px 70px rgba(0, 0, 0, .38), 0 0 30px rgba(56, 213, 255, .08);
      --glow: 0 0 22px rgba(56, 213, 255, .35), 0 0 46px rgba(139, 92, 246, .16);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      min-height: 100vh;
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.7;
      background:
        radial-gradient(circle at 18% 8%, rgba(56, 213, 255, .16), transparent 30%),
        radial-gradient(circle at 86% 18%, rgba(139, 92, 246, .20), transparent 28%),
        radial-gradient(circle at 50% 70%, rgba(214, 168, 79, .08), transparent 34%),
        linear-gradient(180deg, #07111f 0%, #08172a 44%, #050912 100%);
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: -2;
      background-image:
        linear-gradient(rgba(56, 213, 255, .055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56, 213, 255, .055) 1px, transparent 1px);
      background-size: 52px 52px;
      mask-image: radial-gradient(circle at center, black 0%, transparent 78%);
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: -1;
      background:
        conic-gradient(from 90deg at 50% 8%, transparent 0 22%, rgba(56, 213, 255, .08) 23% 24%, transparent 25% 100%),
        repeating-radial-gradient(circle at 50% 8%, rgba(139, 92, 246, .12) 0 1px, transparent 1px 24px);
      opacity: .38;
    }

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button, input, select, textarea { font: inherit; }
    button, a, input, select, textarea { outline: none; }
    button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
      box-shadow: 0 0 0 3px rgba(56, 213, 255, .34);
      border-color: rgba(56, 213, 255, .72);
    }

    .site-container {
      width: min(1220px, calc(100% - 32px));
      margin-inline: auto;
    }

    .top-alert {
      border-bottom: 1px solid rgba(247, 185, 85, .22);
      background: rgba(8, 18, 36, .72);
      color: #ffe2a3;
      font-size: 13px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      border-bottom: 1px solid var(--line);
      background: rgba(5, 12, 24, .78);
      backdrop-filter: blur(18px);
      box-shadow: 0 10px 40px rgba(0, 0, 0, .22);
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: var(--arc);
      background:
        radial-gradient(circle at 35% 25%, rgba(56, 213, 255, .55), transparent 38%),
        linear-gradient(135deg, rgba(15, 42, 68, .92), rgba(139, 92, 246, .20));
      border: 1px solid rgba(56, 213, 255, .34);
      box-shadow: var(--glow);
      flex: none;
    }

    .nav-link, .icon-nav-item {
      transition: transform .2s ease, border-color .2s ease, background .2s ease, color .2s ease, box-shadow .2s ease;
    }

    .nav-link {
      color: var(--muted);
      border: 1px solid transparent;
      border-radius: 999px;
      padding: 9px 14px;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--text);
      background: rgba(56, 213, 255, .10);
      border-color: rgba(56, 213, 255, .26);
    }

    .search-box {
      border: 1px solid rgba(56, 213, 255, .20);
      background: rgba(7, 17, 31, .68);
      color: var(--text);
      min-height: 46px;
      border-radius: 999px;
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .search-box::placeholder { color: #7f94ae; }
    .search-box:focus {
      border-color: rgba(56, 213, 255, .72);
      box-shadow: var(--glow);
      background: rgba(9, 24, 44, .88);
    }

    .mobile-menu {
      display: none;
      border-top: 1px solid var(--line);
      background: rgba(5, 12, 24, .96);
    }

    .mobile-menu.open { display: block; }

    .icon-nav {
      border: 1px solid rgba(56, 213, 255, .18);
      background: rgba(7, 17, 31, .54);
      backdrop-filter: blur(16px);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 14px 38px rgba(0,0,0,.22);
    }

    .icon-nav-item {
      min-height: 76px;
      border-radius: 18px;
      border: 1px solid rgba(56, 213, 255, .15);
      background: linear-gradient(180deg, rgba(15, 42, 68, .52), rgba(7, 17, 31, .42));
    }

    .icon-nav-item:hover, .icon-nav-item.active {
      transform: translateY(-2px);
      border-color: rgba(56, 213, 255, .48);
      box-shadow: 0 0 24px rgba(56, 213, 255, .16);
      background: linear-gradient(180deg, rgba(56, 213, 255, .16), rgba(139, 92, 246, .10));
    }

    .icon-badge {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      background: rgba(56, 213, 255, .10);
      border: 1px solid rgba(56, 213, 255, .24);
      color: var(--arc);
      box-shadow: inset 0 0 18px rgba(56, 213, 255, .10);
    }

    .section-space { padding: 84px 0; }
    .section-tight { padding: 58px 0; }

    .glass-card {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: var(--radius-xl);
      backdrop-filter: blur(18px);
      box-shadow: var(--shadow);
      transition: transform .24s ease, border-color .24s ease, box-shadow .24s ease, background .24s ease;
    }

    .glass-card:hover {
      transform: translateY(-3px);
      border-color: rgba(56, 213, 255, .42);
      box-shadow: var(--shadow), 0 0 34px rgba(56, 213, 255, .12);
    }

    .inner-card {
      border: 1px solid rgba(56, 213, 255, .14);
      background: rgba(10, 27, 50, .46);
      border-radius: var(--radius-lg);
    }

    .hero-band {
      min-height: 82vh;
      display: flex;
      align-items: center;
      padding: 42px 0 36px;
      position: relative;
    }

    .hero-stage {
      border-radius: 32px;
      border: 1px solid rgba(56, 213, 255, .25);
      background:
        linear-gradient(135deg, rgba(8, 18, 36, .78), rgba(15, 42, 68, .58)),
        radial-gradient(circle at 70% 25%, rgba(56, 213, 255, .18), transparent 36%);
      box-shadow: 0 34px 110px rgba(0, 0, 0, .45), inset 0 1px 0 rgba(255,255,255,.06);
      overflow: hidden;
      position: relative;
    }

    .hero-stage::before {
      content: "";
      position: absolute;
      inset: -30%;
      background:
        repeating-conic-gradient(from 0deg, rgba(56, 213, 255, .09) 0 2deg, transparent 2deg 18deg),
        radial-gradient(circle, transparent 0 42%, rgba(139, 92, 246, .12) 43% 44%, transparent 45% 100%);
      opacity: .32;
      transform: rotate(-8deg);
      pointer-events: none;
    }

    .hero-stage > * { position: relative; z-index: 1; }

    .btn {
      min-height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: 999px;
      padding: 12px 18px;
      font-weight: 700;
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease, filter .2s ease;
      border: 1px solid transparent;
      cursor: pointer;
      white-space: nowrap;
    }

    .btn-primary {
      color: #03101d;
      background: linear-gradient(135deg, var(--arc), #75e8ff 48%, var(--violet));
      box-shadow: 0 0 22px rgba(56, 213, 255, .34), 0 16px 34px rgba(56, 213, 255, .12);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      filter: brightness(1.08);
      box-shadow: 0 0 30px rgba(56, 213, 255, .48), 0 18px 42px rgba(139, 92, 246, .18);
    }

    .btn-secondary {
      color: var(--text);
      border-color: rgba(56, 213, 255, .28);
      background: rgba(9, 24, 44, .56);
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      border-color: rgba(56, 213, 255, .58);
      background: rgba(56, 213, 255, .10);
      box-shadow: 0 0 22px rgba(56, 213, 255, .16);
    }

    .tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 30px;
      border-radius: 999px;
      padding: 5px 10px;
      color: var(--muted);
      background: rgba(56, 213, 255, .08);
      border: 1px solid rgba(56, 213, 255, .18);
      font-size: 13px;
    }

    .tag.gold {
      color: #ffe4aa;
      border-color: rgba(214, 168, 79, .34);
      background: rgba(214, 168, 79, .10);
    }

    .filter-chip {
      border: 1px solid rgba(56, 213, 255, .18);
      background: rgba(7, 17, 31, .56);
      color: var(--muted);
      border-radius: 999px;
      min-height: 38px;
      padding: 7px 12px;
      transition: all .2s ease;
    }

    .filter-chip:hover, .filter-chip.active {
      color: var(--text);
      background: rgba(56, 213, 255, .13);
      border-color: rgba(56, 213, 255, .44);
      box-shadow: 0 0 18px rgba(56, 213, 255, .14);
    }

    .preview-tile {
      aspect-ratio: 16 / 10;
      border-radius: 16px;
      border: 1px solid rgba(56, 213, 255, .16);
      background:
        linear-gradient(135deg, rgba(56, 213, 255, .18), transparent 34%),
        radial-gradient(circle at 78% 28%, rgba(139, 92, 246, .30), transparent 34%),
        linear-gradient(180deg, rgba(15, 42, 68, .86), rgba(7, 17, 31, .92));
      position: relative;
      overflow: hidden;
    }

    .preview-tile::after {
      content: "";
      position: absolute;
      inset: 0;
      background-image: linear-gradient(135deg, transparent 0 45%, rgba(255,255,255,.08) 46% 47%, transparent 48% 100%);
      opacity: .55;
    }

    .stat-number {
      color: #dff8ff;
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1;
      font-weight: 900;
      text-shadow: 0 0 20px rgba(56, 213, 255, .38);
    }

    .timeline-line {
      position: relative;
    }

    .timeline-line::before {
      content: "";
      position: absolute;
      left: 18px;
      top: 12px;
      bottom: 12px;
      width: 1px;
      background: linear-gradient(var(--arc), rgba(139, 92, 246, .22));
    }

    .timeline-dot {
      width: 38px;
      height: 38px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: rgba(56, 213, 255, .12);
      border: 1px solid rgba(56, 213, 255, .34);
      color: var(--arc);
      box-shadow: 0 0 20px rgba(56, 213, 255, .16);
      flex: none;
      position: relative;
      z-index: 1;
    }

    .news-link {
      border-bottom: 1px solid rgba(56, 213, 255, .12);
      transition: background .2s ease, color .2s ease, padding-left .2s ease;
    }

    .news-link:hover {
      color: var(--arc);
      background: rgba(56, 213, 255, .06);
      padding-left: 10px;
    }

    .price-row {
      border: 1px solid rgba(56, 213, 255, .16);
      background: rgba(8, 18, 36, .50);
      border-radius: 20px;
      transition: all .2s ease;
    }

    .price-row.featured {
      border-color: rgba(214, 168, 79, .42);
      box-shadow: 0 0 28px rgba(214, 168, 79, .10);
      background: linear-gradient(90deg, rgba(214, 168, 79, .10), rgba(8, 18, 36, .56));
    }

    .price-row:hover {
      transform: translateX(3px);
      border-color: rgba(56, 213, 255, .42);
    }

    details.faq-item {
      border: 1px solid rgba(56, 213, 255, .16);
      background: rgba(8, 18, 36, .52);
      border-radius: 18px;
      overflow: hidden;
      transition: border-color .2s ease, box-shadow .2s ease;
    }

    details.faq-item[open] {
      border-color: rgba(56, 213, 255, .42);
      box-shadow: 0 0 24px rgba(56, 213, 255, .10);
    }

    details.faq-item summary {
      cursor: pointer;
      list-style: none;
      padding: 18px 20px;
      color: var(--text);
      font-weight: 800;
      display: flex;
      justify-content: space-between;
      gap: 18px;
      align-items: center;
    }

    details.faq-item summary::-webkit-details-marker { display: none; }
    details.faq-item summary::after {
      content: "+";
      color: var(--arc);
      font-size: 24px;
      line-height: 1;
      transition: transform .2s ease;
    }

    details.faq-item[open] summary::after {
      transform: rotate(45deg);
    }

    .form-field {
      width: 100%;
      min-height: 48px;
      border-radius: 16px;
      border: 1px solid rgba(56, 213, 255, .18);
      background: rgba(7, 17, 31, .62);
      color: var(--text);
      padding: 12px 14px;
      transition: all .2s ease;
    }

    .form-field::placeholder { color: #8195af; }
    .form-field:focus {
      border-color: rgba(56, 213, 255, .72);
      box-shadow: var(--glow);
      background: rgba(9, 24, 44, .86);
    }

    .footer {
      border-top: 1px solid rgba(56, 213, 255, .22);
      background: linear-gradient(180deg, rgba(5, 12, 24, .82), rgba(3, 8, 16, .96));
      position: relative;
    }

    .footer::before {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: -1px;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(56, 213, 255, .75), transparent);
    }

    .no-scrollbar::-webkit-scrollbar { display: none; }
    .no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

    .back-top {
      position: fixed;
      right: 18px;
      bottom: 18px;
      width: 46px;
      height: 46px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      z-index: 50;
      color: var(--arc);
      background: rgba(8, 18, 36, .76);
      border: 1px solid rgba(56, 213, 255, .28);
      box-shadow: var(--glow);
      transition: transform .2s ease, background .2s ease;
    }

    .back-top:hover {
      transform: translateY(-3px);
      background: rgba(56, 213, 255, .12);
    }

    @media (max-width: 1024px) {
      .hero-band { min-height: 78vh; padding-top: 30px; }
      .section-space { padding: 68px 0; }
      .section-tight { padding: 48px 0; }
      .desktop-nav { display: none !important; }
    }

    @media (max-width: 768px) {
      .site-container { width: min(100% - 28px, 1220px); }
      .hero-band { min-height: 80vh; align-items: flex-start; padding-top: 24px; }
      .hero-stage { border-radius: 24px; }
      .section-space { padding: 56px 0; }
      .section-tight { padding: 42px 0; }
      .icon-nav-item { min-height: 66px; border-radius: 15px; }
      .btn { width: 100%; white-space: normal; }
      .timeline-line::before { left: 16px; }
      .price-row:hover { transform: translateY(-2px); }
    }

    @media (max-width: 520px) {
      .top-alert { font-size: 12px; }
      .brand-mark { width: 38px; height: 38px; }
      details.faq-item summary { padding: 16px; }
      .back-top { width: 42px; height: 42px; right: 14px; bottom: 14px; }
    }

/* roulang page: category1 */
:root {
      --bg: #07111f;
      --bg-deep: #040a14;
      --panel: rgba(8, 18, 36, .76);
      --panel-soft: rgba(14, 31, 55, .58);
      --line: rgba(112, 196, 255, .18);
      --line-bright: rgba(56, 213, 255, .52);
      --text: #edf7ff;
      --muted: #a9bbd0;
      --faint: #71849b;
      --arc: #38d5ff;
      --violet: #8b5cf6;
      --gold: #d6a84f;
      --radius: 20px;
      --shadow: 0 20px 70px rgba(0, 0, 0, .34);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-width: 320px;
      color: var(--text);
      background:
        radial-gradient(circle at 80% 0%, rgba(56, 213, 255, .09), transparent 30rem),
        radial-gradient(circle at 0% 38%, rgba(139, 92, 246, .08), transparent 28rem),
        linear-gradient(145deg, var(--bg-deep), var(--bg) 48%, #091326);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.65;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .25;
      background-image:
        linear-gradient(rgba(95, 185, 255, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(95, 185, 255, .035) 1px, transparent 1px);
      background-size: 44px 44px;
      mask-image: linear-gradient(to bottom, black, transparent 80%);
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    button,
    input,
    select {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

    .site-container {
      width: min(1200px, calc(100% - 64px));
      margin-inline: auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 30;
      background: rgba(4, 10, 20, .88);
      border-top: 1px solid rgba(56, 213, 255, .35);
      border-bottom: 1px solid rgba(112, 196, 255, .12);
      backdrop-filter: blur(18px);
    }

    .brand-mark {
      display: inline-grid;
      width: 38px;
      height: 38px;
      flex: 0 0 38px;
      place-items: center;
      color: #03101d;
      font-size: 12px;
      font-weight: 900;
      border: 1px solid rgba(56, 213, 255, .8);
      border-radius: 12px;
      background: linear-gradient(145deg, var(--arc), #8aeaff);
      box-shadow: 0 0 22px rgba(56, 213, 255, .3);
    }

    .nav-link {
      display: inline-flex;
      min-height: 42px;
      align-items: center;
      padding: 0 14px;
      color: var(--muted);
      border: 1px solid transparent;
      border-radius: 11px;
      transition: .2s ease;
    }

    .nav-link:hover,
    .nav-link:focus-visible,
    .nav-link.active {
      color: var(--text);
      border-color: var(--line-bright);
      background: rgba(56, 213, 255, .08);
      box-shadow: 0 0 18px rgba(56, 213, 255, .1);
      outline: none;
    }

    .icon-nav {
      overflow-x: auto;
      background: rgba(9, 24, 44, .66);
      border: 1px solid var(--line);
      box-shadow: 0 12px 36px rgba(0, 0, 0, .22);
    }

    .icon-nav-item {
      min-height: 64px;
      color: var(--muted);
      border: 1px solid transparent;
      border-radius: 15px;
      transition: .2s ease;
    }

    .icon-nav-item:hover,
    .icon-nav-item:focus-visible,
    .icon-nav-item.active {
      color: var(--text);
      border-color: var(--line-bright);
      background: linear-gradient(100deg, rgba(56, 213, 255, .13), rgba(139, 92, 246, .12));
      box-shadow: 0 0 25px rgba(56, 213, 255, .1);
      outline: none;
    }

    .icon-badge {
      display: grid;
      width: 36px;
      height: 36px;
      flex: 0 0 36px;
      place-items: center;
      color: var(--arc);
      font-size: 20px;
      border: 1px solid rgba(56, 213, 255, .36);
      border-radius: 12px;
      background: rgba(56, 213, 255, .08);
    }

    .search-box {
      height: 44px;
      color: var(--text);
      border: 1px solid var(--line);
      border-radius: 12px;
      outline: none;
      background: rgba(10, 27, 48, .8);
    }

    .search-box::placeholder {
      color: var(--faint);
    }

    .search-box:focus {
      border-color: var(--arc);
      box-shadow: 0 0 0 3px rgba(56, 213, 255, .12);
    }

    .btn {
      display: inline-flex;
      min-height: 44px;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 18px;
      font-size: 14px;
      font-weight: 800;
      border: 1px solid transparent;
      border-radius: 12px;
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }

    .btn:hover {
      transform: translateY(-2px);
    }

    .btn:focus-visible,
    .filter-chip:focus-visible,
    .faq-question:focus-visible {
      outline: 3px solid rgba(56, 213, 255, .28);
      outline-offset: 2px;
    }

    .btn-primary {
      color: #04111d;
      background: linear-gradient(110deg, #38d5ff, #91ecff);
      box-shadow: 0 0 25px rgba(56, 213, 255, .23);
    }

    .btn-primary:hover {
      box-shadow: 0 0 34px rgba(56, 213, 255, .42);
    }

    .btn-secondary {
      color: var(--text);
      border-color: var(--line-bright);
      background: rgba(56, 213, 255, .06);
    }

    .btn-secondary:hover {
      background: rgba(56, 213, 255, .13);
    }

    .glass-card {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      backdrop-filter: blur(16px);
    }

    .section-space {
      padding: 82px 0;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--arc);
      font-size: 12px;
      font-weight: 900;
      letter-spacing: 0;
      text-transform: uppercase;
    }

    .eyebrow::before {
      content: "";
      width: 24px;
      height: 1px;
      background: var(--arc);
      box-shadow: 0 0 10px var(--arc);
    }

    .section-title {
      margin: 12px 0 0;
      font-size: clamp(28px, 4vw, 38px);
      line-height: 1.25;
      font-weight: 900;
    }

    .section-copy {
      max-width: 650px;
      margin-top: 14px;
      color: var(--muted);
      font-size: 15px;
    }

    .filter-panel {
      position: sticky;
      top: 112px;
      align-self: start;
    }

    .filter-label {
      display: block;
      margin-bottom: 10px;
      color: var(--muted);
      font-size: 13px;
      font-weight: 700;
    }

    .dark-select {
      width: 100%;
      height: 46px;
      padding: 0 12px;
      color: var(--text);
      border: 1px solid var(--line);
      border-radius: 11px;
      outline: none;
      background: #0b1c31;
    }

    .dark-select:focus {
      border-color: var(--arc);
      box-shadow: 0 0 0 3px rgba(56, 213, 255, .1);
    }

    .filter-chip {
      min-height: 38px;
      padding: 0 12px;
      color: var(--muted);
      border: 1px solid var(--line);
      border-radius: 10px;
      background: rgba(13, 32, 56, .72);
      transition: .2s ease;
    }

    .filter-chip:hover,
    .filter-chip.selected {
      color: #dffaff;
      border-color: var(--arc);
      background: rgba(56, 213, 255, .13);
      box-shadow: 0 0 18px rgba(56, 213, 255, .12);
    }

    .media-card {
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: rgba(8, 19, 37, .82);
      transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
    }

    .media-card:hover {
      transform: translateY(-4px);
      border-color: rgba(56, 213, 255, .65);
      box-shadow: 0 12px 34px rgba(0, 0, 0, .32), 0 0 22px rgba(56, 213, 255, .12);
    }

    .media-cover {
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background:
        linear-gradient(135deg, rgba(56, 213, 255, .14), transparent 42%),
        radial-gradient(circle at 72% 35%, rgba(139, 92, 246, .32), transparent 26%),
        linear-gradient(145deg, #102a45, #080f20 70%);
    }

    .media-cover::after {
      content: "";
      position: absolute;
      inset: 12px;
      border: 1px solid rgba(142, 225, 255, .18);
      border-radius: 12px;
      transform: rotate(-4deg);
    }

    .play-ring {
      position: absolute;
      z-index: 2;
      left: 50%;
      top: 50%;
      display: grid;
      width: 48px;
      height: 48px;
      place-items: center;
      color: var(--arc);
      border: 1px solid rgba(56, 213, 255, .7);
      border-radius: 50%;
      background: rgba(4, 14, 28, .75);
      opacity: .86;
      transform: translate(-50%, -50%);
      box-shadow: 0 0 25px rgba(56, 213, 255, .22);
    }

    .media-card:hover .play-ring {
      color: #fff;
      background: rgba(56, 213, 255, .2);
      box-shadow: 0 0 32px rgba(56, 213, 255, .5);
    }

    .media-badge {
      position: absolute;
      z-index: 3;
      top: 12px;
      left: 12px;
      padding: 3px 8px;
      color: #dbfaff;
      font-size: 11px;
      font-weight: 800;
      border: 1px solid rgba(56, 213, 255, .35);
      border-radius: 999px;
      background: rgba(3, 14, 28, .78);
    }

    .media-badge.hot {
      color: #ffe8af;
      border-color: rgba(214, 168, 79, .52);
    }

    .info-strip {
      border-top: 1px solid rgba(56, 213, 255, .16);
      border-bottom: 1px solid rgba(56, 213, 255, .16);
      background: rgba(10, 26, 47, .52);
    }

    .info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--muted);
    }

    .info-number {
      color: var(--arc);
      font-size: 22px;
      font-weight: 900;
    }

    .faq-question {
      display: flex;
      width: 100%;
      min-height: 64px;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: var(--text);
      text-align: left;
      background: transparent;
      border: 0;
    }

    .faq-answer {
      display: none;
      padding: 0 48px 20px 0;
      color: var(--muted);
      font-size: 14px;
    }

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

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      color: var(--arc);
    }

    .faq-icon {
      color: var(--faint);
      font-size: 24px;
      transition: .2s ease;
    }

    .cta-band {
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(56, 213, 255, .28);
      border-radius: 24px;
      background:
        linear-gradient(105deg, rgba(56, 213, 255, .13), rgba(139, 92, 246, .13)),
        rgba(8, 20, 39, .8);
    }

    .footer {
      border-top: 1px solid rgba(56, 213, 255, .24);
      background: rgba(3, 8, 17, .86);
    }

    .no-scrollbar::-webkit-scrollbar {
      display: none;
    }

    .no-scrollbar {
      scrollbar-width: none;
    }

    @media (max-width: 1024px) {
      .site-container {
        width: min(100% - 48px, 900px);
      }

      .filter-panel {
        position: static;
      }

      .section-space {
        padding: 64px 0;
      }
    }

    @media (max-width: 640px) {
      .site-container {
        width: calc(100% - 32px);
      }

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

      .icon-nav {
        display: flex;
        gap: 8px;
        padding: 8px;
      }

      .icon-nav-item {
        min-width: 150px;
        min-height: 58px;
        padding: 0 10px;
      }

      .media-card {
        border-radius: 13px;
      }

      .media-cover::after {
        inset: 8px;
      }

      .cta-band {
        border-radius: 18px;
      }
    }

/* roulang page: category2 */
:root {
      --bg: #07111f;
      --bg-deep: #030712;
      --panel: rgba(8, 18, 36, .70);
      --panel-strong: rgba(10, 27, 49, .86);
      --line: rgba(56, 213, 255, .20);
      --line-strong: rgba(139, 92, 246, .42);
      --text: #e7f2ff;
      --muted: #a9b8cf;
      --weak: #7f8da5;
      --arc: #38d5ff;
      --violet: #8b5cf6;
      --gold: #d6a84f;
      --radius-lg: 24px;
      --radius-md: 18px;
      --shadow: 0 22px 70px rgba(0, 0, 0, .42);
      --glow: 0 0 30px rgba(56, 213, 255, .22), 0 0 60px rgba(139, 92, 246, .12);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      min-height: 100vh;
      color: var(--text);
      background:
        radial-gradient(circle at 20% 8%, rgba(56, 213, 255, .14), transparent 34%),
        radial-gradient(circle at 82% 12%, rgba(139, 92, 246, .18), transparent 32%),
        linear-gradient(180deg, #06101f 0%, #040914 46%, #020611 100%);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: -2;
      background-image:
        linear-gradient(rgba(56, 213, 255, .055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, .045) 1px, transparent 1px);
      background-size: 54px 54px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.88), rgba(0,0,0,.18));
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: -1;
      background:
        radial-gradient(circle at 50% 0%, transparent 0 14%, rgba(56, 213, 255, .08) 15%, transparent 16% 100%),
        radial-gradient(circle at 52% 0%, transparent 0 20%, rgba(139, 92, 246, .07) 21%, transparent 22% 100%);
      opacity: .72;
    }

    a { color: inherit; text-decoration: none; }
    button, input, select { font: inherit; }
    button { cursor: pointer; }
    img { max-width: 100%; display: block; }
    :focus-visible { outline: 2px solid var(--arc); outline-offset: 3px; }

    .site-container {
      width: min(1220px, calc(100% - 32px));
      margin-inline: auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      border-bottom: 1px solid rgba(56, 213, 255, .14);
      background: rgba(4, 10, 22, .78);
      backdrop-filter: blur(18px);
      box-shadow: 0 14px 46px rgba(0, 0, 0, .28);
    }

    .site-header::before {
      content: "";
      position: absolute;
      inset: 0 0 auto;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(56, 213, 255, .75), rgba(139, 92, 246, .55), transparent);
    }

    .brand-mark {
      width: 44px;
      height: 44px;
      flex: 0 0 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 15px;
      color: #06101f;
      font-weight: 900;
      background: linear-gradient(135deg, var(--arc), #a5f3fc 46%, var(--violet));
      box-shadow: 0 0 22px rgba(56, 213, 255, .35);
    }

    .nav-link {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      padding: 0 16px;
      border-radius: 999px;
      color: #cbd7eb;
      border: 1px solid transparent;
      transition: .22s ease;
      white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link.active {
      color: #fff;
      border-color: rgba(56, 213, 255, .36);
      background: rgba(56, 213, 255, .10);
      box-shadow: 0 0 24px rgba(56, 213, 255, .14);
    }

    .search-box {
      height: 46px;
      border: 1px solid rgba(56, 213, 255, .20);
      border-radius: 999px;
      color: var(--text);
      background: rgba(5, 13, 27, .76);
      transition: .22s ease;
    }

    .search-box::placeholder { color: #7f8da5; }
    .search-box:focus {
      border-color: rgba(56, 213, 255, .68);
      box-shadow: 0 0 0 4px rgba(56, 213, 255, .10), var(--glow);
      outline: none;
    }

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: 999px;
      padding: 0 18px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease;
      user-select: none;
    }

    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(0); }
    .btn-primary {
      color: #03111f;
      background: linear-gradient(135deg, #38d5ff, #7dd3fc 45%, #8b5cf6);
      box-shadow: 0 0 24px rgba(56, 213, 255, .34), 0 12px 34px rgba(0,0,0,.32);
    }

    .btn-primary:hover { box-shadow: 0 0 34px rgba(56, 213, 255, .48), 0 16px 44px rgba(0,0,0,.36); }
    .btn-secondary {
      color: #dbeafe;
      border-color: rgba(56, 213, 255, .26);
      background: rgba(9, 22, 42, .58);
    }

    .btn-secondary:hover {
      border-color: rgba(56, 213, 255, .58);
      background: rgba(56, 213, 255, .10);
      box-shadow: var(--glow);
    }

    .icon-nav {
      border: 1px solid rgba(56, 213, 255, .16);
      background: linear-gradient(135deg, rgba(8, 18, 36, .72), rgba(14, 22, 49, .58));
      box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
    }

    .icon-nav-item {
      min-height: 72px;
      border-radius: 18px;
      border: 1px solid rgba(56, 213, 255, .12);
      background: rgba(4, 10, 22, .45);
      transition: .22s ease;
    }

    .icon-nav-item:hover,
    .icon-nav-item.active {
      border-color: rgba(56, 213, 255, .48);
      background: rgba(56, 213, 255, .10);
      box-shadow: var(--glow);
      transform: translateY(-2px);
    }

    .icon-badge {
      width: 38px;
      height: 38px;
      flex: 0 0 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      color: #c7f9ff;
      border: 1px solid rgba(56, 213, 255, .26);
      background: radial-gradient(circle, rgba(56, 213, 255, .22), rgba(139, 92, 246, .10));
      box-shadow: inset 0 0 18px rgba(56, 213, 255, .12);
    }

    .mobile-menu {
      display: none;
      padding: 0 0 18px;
    }

    .mobile-menu.open { display: block; }

    .section {
      padding: 76px 0;
    }

    .section-tight {
      padding: 46px 0 72px;
    }

    .glass-card,
    .inner-card {
      border: 1px solid var(--line);
      background: var(--panel);
      backdrop-filter: blur(18px);
      box-shadow: var(--shadow);
    }

    .glass-card { border-radius: var(--radius-lg); }
    .inner-card { border-radius: var(--radius-md); }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 30px;
      padding: 0 12px;
      border-radius: 999px;
      font-size: 13px;
      color: #c7f9ff;
      border: 1px solid rgba(56, 213, 255, .24);
      background: rgba(56, 213, 255, .09);
      white-space: nowrap;
    }

    .badge-warn {
      color: #fde68a;
      border-color: rgba(214, 168, 79, .42);
      background: rgba(214, 168, 79, .10);
    }

    .page-head {
      position: relative;
      padding: 44px 0 34px;
      overflow: hidden;
    }

    .page-head::after {
      content: "";
      position: absolute;
      right: -80px;
      top: 10px;
      width: 360px;
      height: 360px;
      border: 1px solid rgba(56, 213, 255, .16);
      border-radius: 999px;
      box-shadow: inset 0 0 42px rgba(139, 92, 246, .12), 0 0 80px rgba(56, 213, 255, .08);
      pointer-events: none;
    }

    .filter-rail {
      display: flex;
      gap: 12px;
      overflow-x: auto;
      padding: 8px 2px 18px;
      scroll-snap-type: x proximity;
    }

    .filter-rail::-webkit-scrollbar { display: none; }

    .filter-pill {
      flex: 0 0 auto;
      min-height: 50px;
      padding: 0 16px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      border-radius: 18px;
      color: #dbeafe;
      border: 1px solid rgba(56, 213, 255, .16);
      background: rgba(7, 17, 31, .64);
      transition: .22s ease;
      scroll-snap-align: start;
    }

    .filter-pill:hover,
    .filter-pill.active {
      color: #fff;
      border-color: rgba(56, 213, 255, .52);
      background: rgba(56, 213, 255, .12);
      box-shadow: var(--glow);
      transform: translateY(-2px);
    }

    .rank-grid {
      display: grid;
      grid-template-columns: 1.15fr .85fr 1fr;
      gap: 18px;
      align-items: stretch;
    }

    .rank-card {
      position: relative;
      overflow: hidden;
      transition: .22s ease;
    }

    .rank-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 14% 0%, rgba(56, 213, 255, .16), transparent 30%);
      pointer-events: none;
    }

    .rank-card:hover {
      border-color: rgba(56, 213, 255, .46);
      transform: translateY(-3px);
      box-shadow: var(--shadow), var(--glow);
    }

    .rank-row {
      display: grid;
      grid-template-columns: 34px 1fr auto;
      gap: 12px;
      align-items: center;
      padding: 13px 0;
      border-bottom: 1px solid rgba(56, 213, 255, .10);
    }

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

    .rank-num {
      width: 30px;
      height: 30px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #07111f;
      font-size: 13px;
      font-weight: 900;
      background: linear-gradient(135deg, #38d5ff, #8b5cf6);
      box-shadow: 0 0 18px rgba(56, 213, 255, .28);
    }

    .heat {
      height: 7px;
      width: 86px;
      overflow: hidden;
      border-radius: 999px;
      background: rgba(148, 163, 184, .18);
    }

    .heat span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--arc), var(--violet));
      box-shadow: 0 0 16px rgba(56, 213, 255, .36);
    }

    .waterfall {
      column-count: 3;
      column-gap: 18px;
    }

    .content-item {
      display: inline-block;
      width: 100%;
      margin: 0 0 18px;
      overflow: hidden;
      transition: .22s ease;
    }

    .content-item:hover {
      transform: translateY(-3px);
      border-color: rgba(56, 213, 255, .48);
      box-shadow: var(--shadow), var(--glow);
    }

    .cover {
      position: relative;
      aspect-ratio: 16 / 9;
      border-radius: 16px;
      overflow: hidden;
      background:
        linear-gradient(135deg, rgba(56, 213, 255, .18), transparent 38%),
        radial-gradient(circle at 76% 20%, rgba(139, 92, 246, .26), transparent 34%),
        linear-gradient(145deg, #0a1629, #131b35);
      border: 1px solid rgba(56, 213, 255, .14);
    }

    .cover.tall { aspect-ratio: 4 / 3; }

    .cover::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(120deg, transparent 0 35%, rgba(255,255,255,.06) 36%, transparent 37% 100%),
        radial-gradient(circle at 50% 50%, transparent 0 28%, rgba(56,213,255,.10) 29%, transparent 30% 100%);
      opacity: .9;
    }

    .play-ring {
      position: absolute;
      inset: 50% auto auto 50%;
      width: 52px;
      height: 52px;
      transform: translate(-50%, -50%);
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #dffcff;
      background: rgba(4, 10, 22, .58);
      border: 1px solid rgba(56, 213, 255, .34);
      box-shadow: 0 0 28px rgba(56, 213, 255, .22);
      opacity: .88;
    }

    .title-clamp {
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .stat-chip {
      border: 1px solid rgba(56, 213, 255, .14);
      border-radius: 18px;
      background: rgba(4, 10, 22, .48);
      padding: 14px;
    }

    .timeline {
      position: relative;
      padding-left: 22px;
    }

    .timeline::before {
      content: "";
      position: absolute;
      left: 7px;
      top: 10px;
      bottom: 10px;
      width: 1px;
      background: linear-gradient(to bottom, rgba(56, 213, 255, .74), rgba(139, 92, 246, .16));
    }

    .timeline-item {
      position: relative;
      padding: 0 0 22px 18px;
    }

    .timeline-item::before {
      content: "";
      position: absolute;
      left: -20px;
      top: 8px;
      width: 13px;
      height: 13px;
      border-radius: 999px;
      background: var(--arc);
      box-shadow: 0 0 18px rgba(56, 213, 255, .55);
    }

    .faq-item {
      border: 1px solid rgba(56, 213, 255, .16);
      border-radius: 18px;
      background: rgba(8, 18, 36, .62);
      overflow: hidden;
      transition: .22s ease;
    }

    .faq-item.open {
      border-color: rgba(56, 213, 255, .44);
      box-shadow: var(--glow);
    }

    .faq-button {
      width: 100%;
      min-height: 58px;
      padding: 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      text-align: left;
      font-weight: 900;
    }

    .faq-icon {
      transition: transform .22s ease;
      color: var(--arc);
    }

    .faq-item.open .faq-icon { transform: rotate(45deg); }

    .faq-panel {
      display: none;
      padding: 0 18px 18px;
      color: var(--muted);
      font-size: 14px;
    }

    .faq-item.open .faq-panel { display: block; }

    .cta-band {
      position: relative;
      overflow: hidden;
      border-radius: 28px;
      border: 1px solid rgba(56, 213, 255, .22);
      background:
        radial-gradient(circle at 18% 10%, rgba(56, 213, 255, .18), transparent 36%),
        radial-gradient(circle at 88% 34%, rgba(139, 92, 246, .18), transparent 38%),
        rgba(8, 18, 36, .76);
      box-shadow: var(--shadow), var(--glow);
    }

    .footer {
      border-top: 1px solid rgba(56, 213, 255, .14);
      background: rgba(2, 6, 17, .90);
      position: relative;
    }

    .footer::before {
      content: "";
      position: absolute;
      inset: 0 0 auto;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(56, 213, 255, .55), transparent);
    }

    .back-top {
      position: fixed;
      right: 18px;
      bottom: 18px;
      z-index: 40;
      width: 46px;
      height: 46px;
      border-radius: 999px;
      color: #06101f;
      background: linear-gradient(135deg, var(--arc), var(--violet));
      box-shadow: 0 0 24px rgba(56, 213, 255, .34);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
    }

    @media (max-width: 1024px) {
      .site-container { width: min(100% - 48px, 920px); }
      .rank-grid { grid-template-columns: 1fr; }
      .waterfall { column-count: 2; }
      .section { padding: 60px 0; }
    }

    @media (max-width: 640px) {
      .site-container { width: min(100% - 32px, 560px); }
      .brand-mark { width: 40px; height: 40px; flex-basis: 40px; border-radius: 13px; }
      .page-head { padding: 30px 0 22px; }
      .page-head h1 { font-size: 30px; line-height: 1.22; }
      .section { padding: 48px 0; }
      .section-tight { padding: 34px 0 50px; }
      .waterfall { column-count: 1; }
      .filter-pill { min-height: 46px; padding: 0 13px; }
      .rank-row { grid-template-columns: 32px 1fr; }
      .rank-row .heat { grid-column: 2; width: 100%; }
      .btn { width: 100%; }
      .mobile-menu .btn { width: auto; }
      .back-top { width: 42px; height: 42px; right: 14px; bottom: 14px; }
    }