/* roulang page: index */
:root {
      --bg0: #020712;
      --bg1: #06131f;
      --bg2: #0a1f2f;
      --card: rgba(6, 18, 30, 0.74);
      --card-strong: rgba(8, 22, 36, 0.88);
      --line: rgba(148, 208, 255, 0.15);
      --line-strong: rgba(112, 220, 255, 0.28);
      --text: #e7f5ff;
      --muted: #a4bacb;
      --soft: #73899a;
      --cyan: #42d8ff;
      --cyan-2: #89edff;
      --mint: #6ef0c3;
      --shadow: 0 18px 46px rgba(0, 0, 0, 0.28);
      --shadow-soft: 0 10px 28px rgba(11, 96, 138, 0.12);
      --radius: 14px;
      --radius-sm: 10px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      color: var(--text);
      letter-spacing: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
      background:
        radial-gradient(1200px 900px at 18% 0%, rgba(8, 41, 60, 0.82), transparent 55%),
        radial-gradient(900px 700px at 102% 8%, rgba(6, 52, 74, 0.52), transparent 45%),
        linear-gradient(180deg, #02060d 0%, #07111b 40%, #03111a 100%);
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 72px 72px;
      opacity: 0.09;
      mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 96%);
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background:
        radial-gradient(circle at 20% 18%, rgba(66, 216, 255, 0.04), transparent 20%),
        radial-gradient(circle at 86% 14%, rgba(110, 240, 195, 0.03), transparent 18%),
        radial-gradient(circle at 70% 78%, rgba(255, 255, 255, 0.02), transparent 18%);
      opacity: 0.85;
    }

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

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

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

    ::selection {
      background: rgba(66, 216, 255, 0.28);
      color: #fff;
    }

    ::-webkit-scrollbar {
      width: 10px;
      height: 10px;
    }

    ::-webkit-scrollbar-track {
      background: rgba(8, 16, 27, 0.85);
    }

    ::-webkit-scrollbar-thumb {
      background: linear-gradient(180deg, rgba(66, 216, 255, 0.35), rgba(110, 240, 195, 0.35));
      border-radius: 999px;
      border: 2px solid rgba(8, 16, 27, 0.85);
    }

    :focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px rgba(66, 216, 255, 0.24), 0 0 0 1px rgba(66, 216, 255, 0.28);
    }

    .container {
      width: 100%;
      max-width: 80rem;
      margin: 0 auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }

    @media (min-width: 768px) {
      .container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
      }
    }

    @media (min-width: 1280px) {
      .container {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }

    .glass {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: var(--card);
      backdrop-filter: blur(18px);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), var(--shadow-soft);
    }

    .glass::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(66, 216, 255, 0.35), transparent);
      opacity: 0.9;
      pointer-events: none;
    }

    .glass-strong {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      border: 1px solid var(--line-strong);
      background: var(--card-strong);
      backdrop-filter: blur(20px);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), var(--shadow);
    }

    .panel {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: rgba(6, 18, 30, 0.68);
      backdrop-filter: blur(16px);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
      transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
    }

    .panel:hover {
      transform: translateY(-2px);
      border-color: rgba(110, 240, 195, 0.25);
      background: rgba(8, 24, 39, 0.8);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(66, 216, 255, 0.06);
    }

    .panel::before {
      content: "";
      position: absolute;
      inset: 0 auto auto 0;
      width: 100%;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(66, 216, 255, 0.28), transparent);
      pointer-events: none;
    }

    .button-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      border-radius: 10px;
      border: 1px solid rgba(102, 223, 255, 0.26);
      background: linear-gradient(135deg, rgba(67, 214, 255, 0.96), rgba(37, 99, 235, 0.86));
      color: #effcff;
      box-shadow: 0 10px 30px rgba(15, 113, 179, 0.28), 0 0 0 1px rgba(102, 223, 255, 0.12);
      transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease, border-color 180ms ease;
    }

    .button-glow:hover {
      transform: translateY(-1px);
      filter: brightness(1.04);
      border-color: rgba(134, 231, 255, 0.38);
      box-shadow: 0 14px 34px rgba(15, 113, 179, 0.34), 0 0 24px rgba(66, 216, 255, 0.16);
    }

    .button-glow:active {
      transform: translateY(0);
      filter: brightness(0.98);
    }

    .button-soft {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      border-radius: 10px;
      border: 1px solid rgba(148, 208, 255, 0.16);
      background: rgba(255, 255, 255, 0.04);
      color: #eff8ff;
      transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
    }

    .button-soft:hover {
      transform: translateY(-1px);
      border-color: rgba(110, 240, 195, 0.22);
      background: rgba(66, 216, 255, 0.08);
      box-shadow: 0 0 0 1px rgba(66, 216, 255, 0.06);
    }

    .nav-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 40px;
      padding: 0.5rem 0.95rem;
      border-radius: 9999px;
      border: 1px solid rgba(148, 208, 255, 0.12);
      background: rgba(255, 255, 255, 0.03);
      color: #d9e9f4;
      font-size: 0.9375rem;
      line-height: 1;
      transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, color 180ms ease;
    }

    .nav-pill:hover {
      transform: translateY(-1px);
      border-color: rgba(66, 216, 255, 0.28);
      background: rgba(66, 216, 255, 0.08);
      color: #f4fbff;
    }

    .nav-pill-active {
      border-color: rgba(66, 216, 255, 0.35);
      background: rgba(66, 216, 255, 0.14);
      color: #ffffff;
      box-shadow: 0 0 0 1px rgba(66, 216, 255, 0.06);
    }

    .field {
      width: 100%;
      min-height: 48px;
      border-radius: 12px;
      border: 1px solid rgba(148, 208, 255, 0.16);
      background: rgba(5, 16, 27, 0.72);
      color: #eef8ff;
      padding: 0.8rem 0.95rem;
      transition: border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
    }

    .field::placeholder {
      color: #7f97a8;
    }

    .field:focus {
      border-color: rgba(66, 216, 255, 0.38);
      background: rgba(7, 22, 34, 0.9);
      box-shadow: 0 0 0 3px rgba(66, 216, 255, 0.15);
    }

    textarea.field {
      min-height: 136px;
      resize: vertical;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      min-height: 30px;
      padding: 0.35rem 0.65rem;
      border-radius: 9999px;
      border: 1px solid rgba(110, 240, 195, 0.2);
      background: rgba(110, 240, 195, 0.08);
      color: #d9fff2;
      font-size: 0.78rem;
      line-height: 1;
      white-space: nowrap;
    }

    .badge-soft {
      border-color: rgba(148, 208, 255, 0.16);
      background: rgba(255, 255, 255, 0.03);
      color: #c8d8e6;
    }

    .badge-cyan {
      border-color: rgba(66, 216, 255, 0.18);
      background: rgba(66, 216, 255, 0.09);
      color: #d8f7ff;
    }

    .metric-number {
      font-size: 2.1rem;
      line-height: 1;
      font-weight: 700;
      letter-spacing: 0;
      color: #f7fcff;
    }

    .metric-label {
      margin-top: 0.55rem;
      font-size: 0.95rem;
      color: #dceaf4;
    }

    .metric-note {
      margin-top: 0.65rem;
      font-size: 0.8rem;
      line-height: 1.7;
      color: var(--muted);
    }

    summary {
      list-style: none;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    details[open] .faq-arrow {
      transform: rotate(180deg);
    }

    .mini-track {
      position: relative;
      overflow: hidden;
      border-radius: 9999px;
      background: rgba(255, 255, 255, 0.05);
    }

    .mini-track > span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, rgba(66, 216, 255, 0.96), rgba(110, 240, 195, 0.9));
      box-shadow: 0 0 18px rgba(66, 216, 255, 0.22);
    }

    .table-shell {
      overflow: hidden;
      border-radius: 16px;
      border: 1px solid rgba(148, 208, 255, 0.14);
      background: rgba(6, 18, 30, 0.68);
      backdrop-filter: blur(16px);
    }

    .table-shell th,
    .table-shell td {
      border-color: rgba(148, 208, 255, 0.08);
    }

    .table-shell thead th {
      position: sticky;
      top: 0;
      background: rgba(8, 22, 36, 0.92);
      backdrop-filter: blur(8px);
      z-index: 1;
    }

    .icon-box {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 2.75rem;
      height: 2.75rem;
      border-radius: 12px;
      border: 1px solid rgba(66, 216, 255, 0.16);
      background: rgba(66, 216, 255, 0.08);
      color: #c9f6ff;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    }

    .icon-box svg {
      width: 1.15rem;
      height: 1.15rem;
    }

    .footer-link {
      color: #c8d6e1;
      transition: color 180ms ease, opacity 180ms ease;
    }

    .footer-link:hover {
      color: #ffffff;
    }

/* roulang page: category1 */
:root {
      --bg-deep: #020812;
      --bg-navy: #061728;
      --bg-cyan: #082f49;
      --text-main: #eaf7ff;
      --text-soft: #a9bdd0;
      --text-muted: #6f879d;
      --cyan: #22d3ee;
      --sky: #38bdf8;
      --mint: #5eead4;
      --line: rgba(148, 225, 255, .16);
      --panel: rgba(8, 24, 39, .68);
      --panel-strong: rgba(8, 31, 52, .82);
      --radius: 12px;
      --shadow: 0 20px 60px rgba(6, 182, 212, .12);
      --glow: 0 0 0 1px rgba(34, 211, 238, .25), 0 12px 36px rgba(34, 211, 238, .16);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
      line-height: 1.6;
      background:
        radial-gradient(circle at 18% 8%, rgba(34, 211, 238, .14), transparent 28%),
        radial-gradient(circle at 82% 12%, rgba(94, 234, 212, .08), transparent 30%),
        linear-gradient(145deg, #020812 0%, #061728 46%, #031019 100%);
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(148, 225, 255, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 225, 255, .035) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), rgba(0,0,0,.18));
      z-index: -2;
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .22;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(/%23n)' opacity='.35'/%3E%3C/svg%3E");
      z-index: -1;
    }

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

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

    button {
      cursor: pointer;
    }

    svg {
      display: block;
      width: 1em;
      height: 1em;
      stroke: currentColor;
      fill: none;
      stroke-width: 1.8;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .container {
      width: min(100% - 32px, 1280px);
      margin-inline: auto;
    }

    .glass {
      background: var(--panel);
      border: 1px solid var(--line);
      box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.06);
      backdrop-filter: blur(18px);
    }

    .icon-box {
      display: inline-flex;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      color: var(--cyan);
      background: linear-gradient(145deg, rgba(34, 211, 238, .16), rgba(94, 234, 212, .06));
      border: 1px solid rgba(34, 211, 238, .22);
      box-shadow: 0 10px 28px rgba(34, 211, 238, .12);
    }

    .field {
      width: 100%;
      border: 1px solid rgba(148, 225, 255, .16);
      border-radius: 12px;
      color: var(--text-main);
      background: rgba(2, 12, 24, .72);
      outline: none;
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .field::placeholder {
      color: rgba(169, 189, 208, .7);
    }

    .field:focus,
    .field:focus-visible {
      border-color: rgba(34, 211, 238, .72);
      box-shadow: 0 0 0 4px rgba(34, 211, 238, .12);
      background: rgba(4, 18, 32, .9);
    }

    .button-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid rgba(103, 232, 249, .42);
      border-radius: 10px;
      color: #ecfeff;
      background: linear-gradient(135deg, rgba(8, 145, 178, .95), rgba(20, 184, 166, .9));
      box-shadow: 0 10px 28px rgba(34, 211, 238, .2);
      transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
    }

    .button-glow:hover {
      transform: translateY(-1px);
      box-shadow: 0 16px 38px rgba(34, 211, 238, .28);
      filter: brightness(1.06);
    }

    .button-glow:active {
      transform: translateY(0);
      filter: brightness(.94);
    }

    .button-ghost {
      display: inline-flex;
      min-height: 42px;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 1px solid rgba(148, 225, 255, .18);
      border-radius: 10px;
      color: #d8f6ff;
      background: rgba(255,255,255,.04);
      transition: border-color .2s ease, background .2s ease, transform .2s ease;
    }

    .button-ghost:hover {
      border-color: rgba(34, 211, 238, .44);
      background: rgba(34, 211, 238, .08);
      transform: translateY(-1px);
    }

    .nav-pill {
      display: inline-flex;
      min-height: 40px;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      padding: 0 14px;
      color: #bdd1e3;
      font-size: 14px;
      border: 1px solid transparent;
      transition: color .2s ease, background .2s ease, border-color .2s ease;
      white-space: nowrap;
    }

    .nav-pill:hover {
      color: #f2fbff;
      border-color: rgba(34, 211, 238, .18);
      background: rgba(255,255,255,.04);
    }

    .nav-pill-active {
      color: #ecfeff;
      border-color: rgba(34, 211, 238, .38);
      background: rgba(34, 211, 238, .1);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
    }

    .section {
      padding: 42px 0;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      color: var(--text-muted);
      font-size: 13px;
    }

    .breadcrumb a:hover,
    .footer-link:hover {
      color: var(--cyan);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 26px;
      border-radius: 9999px;
      padding: 0 10px;
      color: #c7f9ff;
      font-size: 12px;
      border: 1px solid rgba(34, 211, 238, .22);
      background: rgba(34, 211, 238, .08);
      white-space: nowrap;
    }

    .badge-mint {
      color: #c8fff4;
      border-color: rgba(94, 234, 212, .24);
      background: rgba(94, 234, 212, .08);
    }

    .dot {
      width: 7px;
      height: 7px;
      border-radius: 9999px;
      background: var(--mint);
      box-shadow: 0 0 12px rgba(94, 234, 212, .8);
    }

    .filter-card,
    .index-card,
    .faq-item,
    .stat-card {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: rgba(6, 22, 36, .68);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
      backdrop-filter: blur(16px);
    }

    .filter-card::before,
    .index-card::before,
    .stat-card::before {
      content: "";
      position: absolute;
      inset: 0 0 auto;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(103, 232, 249, .56), transparent);
      opacity: .65;
    }

    .index-card {
      transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
    }

    .index-card:hover {
      transform: translateY(-3px);
      border-color: rgba(34, 211, 238, .34);
      background: rgba(8, 30, 48, .76);
      box-shadow: var(--glow);
    }

    .check-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      border-radius: 10px;
      padding: 10px 11px;
      color: #dcecff;
      background: rgba(255,255,255,.035);
      border: 1px solid rgba(255,255,255,.055);
      transition: border-color .2s ease, background .2s ease;
    }

    .check-row:hover {
      border-color: rgba(34, 211, 238, .24);
      background: rgba(34, 211, 238, .07);
    }

    .compare-row {
      display: grid;
      grid-template-columns: 1.1fr 1fr 1fr;
      gap: 1px;
      overflow: hidden;
      border-radius: 12px;
      border: 1px solid rgba(148, 225, 255, .14);
      background: rgba(148, 225, 255, .08);
    }

    .compare-row > div {
      padding: 16px;
      background: rgba(5, 18, 31, .82);
    }

    .compare-head > div {
      color: #f4fdff;
      background: rgba(8, 36, 58, .92);
      font-weight: 600;
    }

    .faq-button {
      width: 100%;
      min-height: 58px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 17px 18px;
      color: #f3fbff;
      text-align: left;
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--text-soft);
      font-size: 14px;
      line-height: 1.8;
    }

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

    .faq-icon {
      flex: 0 0 auto;
      color: var(--cyan);
      transition: transform .2s ease;
    }

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

    .footer-link {
      color: #94a9bb;
      transition: color .2s ease;
    }

    :focus-visible {
      outline: 2px solid rgba(34, 211, 238, .8);
      outline-offset: 3px;
    }

    @media (max-width: 1024px) {
      .section {
        padding: 34px 0;
      }

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

      .compare-head {
        display: none;
      }

      .compare-row > div::before {
        display: block;
        margin-bottom: 4px;
        color: var(--text-muted);
        font-size: 12px;
      }

      .compare-row > div:nth-child(1)::before {
        content: "对比项";
      }

      .compare-row > div:nth-child(2)::before {
        content: "普通查找";
      }

      .compare-row > div:nth-child(3)::before {
        content: "本站筛选";
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 24px, 1280px);
      }

      .icon-box {
        width: 38px;
        height: 38px;
        border-radius: 10px;
      }

      .field {
        min-height: 44px;
      }

      .button-glow,
      .button-ghost {
        min-height: 42px;
      }
    }