/* roulang page: index */
:root {
      --c-primary: #1E6F9F;
      --c-primary-dark: #16567C;
      --c-primary-soft: #E6F1F7;
      --c-accent: #2A9B8A;
      --c-accent-dark: #1F7A6C;
      --c-accent-soft: #E5F5F2;
      --bg: #F5F8FB;
      --bg-alt: #EEF3F7;
      --bg-dark: #123044;
      --bg-dark-2: #0C2230;
      --white: #ffffff;
      --text: #1A2B36;
      --text-2: #4A5D6A;
      --text-3: #7A8B96;
      --text-on-dark: #F4F8FB;
      --border: #D5E1EA;
      --border-soft: #E4EDF3;
      --danger: #C23A3A;
      --radius: 12px;
      --radius-sm: 8px;
      --shadow: 0 12px 32px rgba(18, 48, 68, .08);
      --shadow-hover: 0 16px 40px rgba(18, 48, 68, .14);
      --header-h: 72px;
      --topbar-h: 40px;
      --space: 24px;
      --section-y: 100px;
      --container: 1200px;
      --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--bg);
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--c-primary); text-decoration: none; transition: color .2s ease, opacity .2s ease; }
    a:hover { color: var(--c-primary-dark); }
    a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
      outline: 2px solid var(--c-primary);
      outline-offset: 2px;
    }
    button, input, select, textarea { font-family: inherit; font-size: 16px; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4 { margin: 0 0 12px; font-weight: 700; line-height: 1.28; color: var(--text); letter-spacing: 0; }
    h1 { font-size: 44px; }
    h2 { font-size: 30px; }
    h3 { font-size: 18px; }
    p { margin: 0 0 16px; color: var(--text-2); }
    ul { margin: 0; padding: 0; list-style: none; }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
    .skip {
      position: absolute; left: -999px; top: 0;
    }
    .skip:focus { left: 16px; top: 8px; background: #fff; padding: 8px 12px; z-index: 100; }

    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 10px 20px; border-radius: var(--radius-sm);
      font-weight: 600; line-height: 1.2; border: 2px solid transparent;
      transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
    }
    .btn-primary { background: var(--c-primary); color: #fff; }
    .btn-primary:hover { background: var(--c-primary-dark); color: #fff; box-shadow: 0 0 0 2px rgba(30,111,159,.25); }
    .btn-primary:active { transform: translateY(1px); }
    .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
    .btn-ghost:hover { background: rgba(255,255,255,.1); color: #fff; box-shadow: 0 0 0 2px rgba(255,255,255,.2); }
    .btn-line { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
    .btn-line:hover { background: var(--c-primary-soft); color: var(--c-primary-dark); box-shadow: 0 0 0 2px rgba(30,111,159,.18); }
    .btn-accent { background: var(--c-accent); color: #fff; }
    .btn-accent:hover { background: var(--c-accent-dark); color: #fff; box-shadow: 0 0 0 2px rgba(42,155,138,.25); }
    .btn-block { width: 100%; }

    .badge {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 4px 10px; border-radius: 4px; font-size: 12px; font-weight: 600;
      background: var(--c-primary-soft); color: var(--c-primary-dark); letter-spacing: 0;
    }
    .badge-accent { background: var(--c-accent-soft); color: var(--c-accent-dark); }

    .topbar {
      height: var(--topbar-h); background: #F8FBFD; border-bottom: 1px solid var(--border-soft);
      font-size: 13px; color: var(--text-2);
    }
    .topbar .container {
      height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
    }
    .topbar a { color: var(--text-2); }
    .topbar a:hover { color: var(--c-primary); }
    .topbar-left, .topbar-right { display: flex; align-items: center; gap: 18px; }
    .topbar .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--c-accent); display: inline-block; }

    .site-header {
      position: sticky; top: 0; z-index: 80; background: rgba(255,255,255,.96);
      border-bottom: 1px solid var(--border-soft); backdrop-filter: saturate(1.2);
      transition: box-shadow .2s ease, height .2s ease;
    }
    .site-header.is-scrolled { box-shadow: 0 8px 24px rgba(18,48,68,.08); }
    .nav-main { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .site-header.is-scrolled .nav-main { height: 64px; }
    .logo {
      display: flex; align-items: center; gap: 10px; color: var(--text); flex-shrink: 0;
    }
    .logo:hover { color: var(--text); }
    .logo-mark {
      width: 40px; height: 40px; border-radius: 10px; background: var(--c-primary);
      display: grid; place-items: center; color: #fff; flex-shrink: 0;
    }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-size: 16px; font-weight: 700; }
    .logo-text span { font-size: 12px; color: var(--text-3); font-weight: 500; }
    .nav-links { display: flex; align-items: center; gap: 4px; }
    .nav-links a {
      position: relative; color: var(--text-2); font-size: 15px; font-weight: 500;
      padding: 10px 12px; min-height: 44px; display: inline-flex; align-items: center;
    }
    .nav-links a:hover { color: var(--c-primary); }
    .nav-links a.is-active { color: var(--c-primary); }
    .nav-links a.is-active::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 6px;
      height: 2px; background: var(--c-primary); border-radius: 2px;
    }
    .nav-cta { flex-shrink: 0; }
    .nav-toggle {
      display: none; width: 44px; height: 44px; border-radius: 8px; border: 1px solid var(--border);
      align-items: center; justify-content: center; flex-direction: column; gap: 5px;
    }
    .nav-toggle span { width: 18px; height: 2px; background: var(--text); display: block; }
    .drawer {
      position: fixed; inset: 0 0 0 auto; width: min(86vw, 360px); background: #fff;
      z-index: 90; transform: translateX(100%); transition: transform .28s ease;
      box-shadow: -12px 0 40px rgba(18,48,68,.12); padding: 24px 20px; overflow-y: auto;
    }
    .drawer.is-open { transform: translateX(0); }
    .drawer a {
      display: flex; align-items: center; min-height: 48px; padding: 8px 10px;
      color: var(--text); border-bottom: 1px solid var(--border-soft); font-weight: 500;
    }
    .drawer a.is-active { color: var(--c-primary); box-shadow: inset 3px 0 0 var(--c-primary); }
    .drawer-close { min-height: 44px; margin-bottom: 8px; color: var(--text-2); }
    .overlay {
      position: fixed; inset: 0; background: rgba(18,48,68,.4); z-index: 85; opacity: 0; visibility: hidden;
      transition: opacity .2s ease;
    }
    .overlay.is-open { opacity: 1; visibility: visible; }

    .hero {
      position: relative; min-height: 680px; display: flex; align-items: center;
      background: var(--bg-dark) center/cover no-repeat;
      isolation: isolate;
    }
    .hero::before {
      content: ""; position: absolute; inset: 0; z-index: 0;
      background:
        radial-gradient(circle at 78% 30%, rgba(42,155,138,.18), transparent 28%),
        linear-gradient(90deg, rgba(12,34,48,.88) 0%, rgba(18,48,68,.62) 48%, rgba(18,48,68,.28) 100%);
    }
    .hero .container { position: relative; z-index: 1; padding: 72px 0; }
    .hero-grid {
      display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: stretch;
    }
    .hero h1 { color: #fff; margin-bottom: 16px; max-width: 16em; }
    .hero-lead { color: rgba(244,248,251,.88); font-size: 16px; line-height: 1.8; margin-bottom: 28px; max-width: 38em; }
    .quiz {
      background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
      border-radius: var(--radius); padding: 20px; color: #fff;
    }
    .quiz-label { font-size: 13px; color: rgba(255,255,255,.7); margin-bottom: 10px; }
    .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
    .chip {
      min-height: 40px; padding: 6px 14px; border-radius: 8px; border: 1px solid rgba(255,255,255,.28);
      color: #fff; background: transparent; font-size: 14px; font-weight: 500;
    }
    .chip.is-on { background: #fff; color: var(--c-primary-dark); border-color: #fff; }
    .preview {
      background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
      overflow: hidden; display: flex; flex-direction: column; min-height: 100%;
    }
    .preview img { width: 100%; height: 210px; object-fit: cover; }
    .preview-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
    .preview-kicker { font-size: 12px; color: var(--c-accent-dark); font-weight: 700; margin-bottom: 6px; }
    .preview h3 { font-size: 20px; }
    .preview p { font-size: 14px; }
    .preview-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 18px; }
    .preview .btn { margin-top: auto; }

    .section { padding: var(--section-y) 0; position: relative; }
    .section-alt { background: var(--bg-alt); }
    .section-white { background: #fff; }
    .sec-head { margin-bottom: 40px; max-width: 760px; }
    .sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
    .sec-kicker { color: var(--c-primary); font-size: 13px; font-weight: 700; margin-bottom: 8px; }
    .sec-head p { margin-bottom: 0; }

    .cat-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 20px; }
    .cat-card {
      position: relative; min-height: 280px; border-radius: var(--radius); overflow: hidden;
      box-shadow: var(--shadow); color: #fff; display: flex; align-items: flex-end;
      transition: transform .25s ease, box-shadow .25s ease;
    }
    .cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .cat-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
    .cat-card::after {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(18,48,68,.1), rgba(18,48,68,.78));
    }
    .cat-card div { position: relative; z-index: 1; padding: 22px; }
    .cat-card h3 { color: #fff; }
    .cat-card p { color: rgba(255,255,255,.86); margin: 0; font-size: 14px; }

    .pain-wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: stretch; }
    .pain-photo {
      border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); min-height: 420px;
    }
    .pain-photo img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
    .pain-list { display: grid; gap: 16px; }
    .pain-item {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 20px 20px 18px 20px; display: grid; grid-template-columns: 44px 1fr; gap: 14px;
    }
    .pain-ico {
      width: 44px; height: 44px; border-radius: 10px; background: var(--c-primary-soft); color: var(--c-primary);
      display: grid; place-items: center;
    }
    .pain-item h3 { margin-bottom: 6px; }
    .pain-item p { margin: 0; font-size: 14px; }

    .split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
    .split.reverse { direction: rtl; }
    .split.reverse > * { direction: ltr; }
    .arch-list { display: grid; gap: 14px; margin: 20px 0 28px; }
    .arch-item { display: grid; grid-template-columns: 28px 1fr; gap: 12px; }
    .arch-num {
      width: 28px; height: 28px; border-radius: 50%; background: var(--c-accent); color: #fff;
      display: grid; place-items: center; font-size: 13px; font-weight: 700;
    }
    .spec-note {
      background: var(--c-primary-soft); border-left: 3px solid var(--c-primary);
      padding: 14px 16px; border-radius: 0 8px 8px 0; color: var(--text); font-size: 14px; margin-bottom: 22px;
    }
    .frame {
      border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow);
    }
    .frame img { width: 100%; height: 420px; object-fit: cover; }

    .spec-grid { display: grid; grid-template-columns: 1.1fr 1fr .9fr; gap: 20px; }
    .spec-card, .cert-card {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 24px;
    }
    .spec-card ul { display: grid; gap: 10px; }
    .spec-card li {
      display: flex; justify-content: space-between; gap: 12px; padding: 10px 0;
      border-bottom: 1px dashed var(--border-soft); font-size: 14px;
    }
    .spec-card li span { color: var(--text-3); }
    .spec-card li b { font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; }
    .cert-card img { width: 100%; height: 160px; object-fit: cover; border-radius: 8px; margin-bottom: 14px; }

    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
    .step {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      padding: 24px 20px; box-shadow: var(--shadow); position: relative;
    }
    .step-no {
      width: 36px; height: 36px; border-radius: 50%; background: var(--c-accent); color: #fff;
      display: grid; place-items: center; font-weight: 700; margin-bottom: 14px; font-variant-numeric: tabular-nums;
    }
    .step p { margin: 0; font-size: 14px; }

    .ability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .ability {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 22px; transition: transform .25s ease, box-shadow .25s ease;
    }
    .ability:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .ability-ico { width: 48px; height: 48px; margin-bottom: 14px; color: var(--c-primary); }
    .ability p { font-size: 14px; min-height: 4.6em; }
    .ability-foot { margin-top: 8px; }

    .model-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .model {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column;
      transition: transform .25s ease, box-shadow .25s ease;
    }
    .model:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .model img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
    .model-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
    .model h3 { font-size: 20px; }
    .model-params { display: grid; gap: 8px; margin: 8px 0 18px; }
    .model-params li { font-size: 14px; color: var(--text-2); padding-left: 14px; position: relative; }
    .model-params li::before {
      content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--c-primary);
      position: absolute; left: 0; top: 9px;
    }
    .model .price { font-size: 14px; color: var(--text-3); margin-bottom: 14px; }
    .model .btn { margin-top: auto; }

    .news-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 32px; }
    .news-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px; }
    .news-side { display: grid; gap: 20px; }
    .news-card {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); overflow: hidden; display: grid;
    }
    .news-card.big { grid-template-rows: auto 1fr; }
    .news-card.small { grid-template-columns: 140px 1fr; }
    .news-card img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16/10; }
    .news-card.small img { height: 100%; aspect-ratio: auto; min-height: 120px; }
    .news-body { padding: 18px 20px; }
    .news-meta { font-size: 12px; color: var(--text-3); margin-bottom: 6px; }
    .news-card h3 { font-size: 18px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .news-card p { margin: 0; font-size: 14px; }

    .rank-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
    .rank-list { display: grid; gap: 12px; }
    .rank-item {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 16px 18px; display: grid; grid-template-columns: 42px 1fr auto;
      gap: 14px; align-items: center;
    }
    .rank-no {
      width: 42px; height: 42px; border-radius: 10px; background: var(--c-primary-soft); color: var(--c-primary);
      display: grid; place-items: center; font-weight: 700; font-size: 18px; font-variant-numeric: tabular-nums;
    }
    .rank-item:nth-child(1) .rank-no { background: var(--c-accent); color: #fff; }
    .rank-item h3 { margin: 0; font-size: 16px; }
    .rank-item p { margin: 0; font-size: 13px; }
    .rank-tag { font-size: 12px; color: var(--text-3); }

    .dark {
      background: var(--bg-dark) center/cover no-repeat; color: var(--text-on-dark); position: relative;
    }
    .dark::before {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(12,34,48,.92), rgba(18,48,68,.78));
    }
    .dark .container { position: relative; z-index: 1; }
    .dark h2, .dark h3 { color: #fff; }
    .dark p, .dark li { color: rgba(244,248,251,.82); }
    .dark-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
    .quote { font-size: 26px; line-height: 1.45; font-weight: 700; color: #fff; margin: 0 0 16px; }
    .case-block { border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0; }
    .case-block h3 { margin-bottom: 8px; }
    .case-block .nums { display: flex; gap: 24px; margin-top: 12px; }
    .case-block .nums b { display: block; font-size: 22px; color: var(--c-accent); font-variant-numeric: tabular-nums; }
    .case-block .nums span { font-size: 12px; color: rgba(244,248,251,.7); }

    .scene-list { display: grid; gap: 14px; }
    .scene {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 18px 22px; display: grid; grid-template-columns: 140px 1fr auto;
      gap: 18px; align-items: center; min-height: 92px;
    }
    .scene-tag {
      font-weight: 700; color: var(--c-primary-dark); background: var(--c-primary-soft);
      border-radius: 6px; min-height: 44px; display: grid; place-items: center; text-align: center; padding: 8px;
      font-size: 14px;
    }
    .scene p { margin: 0; font-size: 14px; }

    .story-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 20px; }
    .story-main {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); overflow: hidden; display: grid; grid-template-columns: 1fr 1fr;
    }
    .story-main img { width: 100%; height: 100%; object-fit: cover; min-height: 280px; }
    .story-main div { padding: 28px; }
    .story-side { display: grid; gap: 20px; }
    .story-mini {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 20px;
    }
    .story-mini h3 { font-size: 16px; }

    .result-wrap { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; align-items: center; }
    .result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .result-card {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 22px;
    }
    .result-card b {
      display: block; font-size: 32px; color: var(--c-accent); line-height: 1.1; margin-bottom: 8px;
      font-variant-numeric: tabular-nums;
    }
    .result-card span { font-size: 14px; color: var(--text-2); }

    .statbar { background: var(--bg-alt); padding: 48px 0; border-block: 1px solid var(--border-soft); }
    .stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; text-align: center; }
    .stat b {
      display: block; font-size: 32px; color: var(--c-accent); font-variant-numeric: tabular-nums; line-height: 1.1;
    }
    .stat span { font-size: 13px; color: var(--text-2); }

    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: start; }
    .review {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 24px;
    }
    .review:nth-child(2) { transform: translateY(-16px); }
    .stars { color: #D4A017; letter-spacing: 2px; margin-bottom: 8px; }
    .review p { font-size: 14px; }
    .review-org { font-size: 13px; color: var(--text-3); font-weight: 600; }

    .partner-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 36px; }
    .partner-chip {
      background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px;
      min-height: 44px; display: inline-flex; align-items: center; color: var(--text-2); font-size: 14px; font-weight: 500;
    }
    .guard { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .guard-item {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      padding: 20px; box-shadow: var(--shadow);
    }
    .guard-item h3 { font-size: 16px; }
    .guard-item p { margin: 0; font-size: 14px; }

    .dash { display: grid; grid-template-columns: 1.3fr .7fr; gap: 28px; align-items: start; }
    table.data {
      width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--border);
      border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
    }
    table.data th, table.data td {
      padding: 12px 14px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--border-soft);
      font-variant-numeric: tabular-nums;
    }
    table.data th { background: var(--c-primary); color: #fff; font-weight: 600; }
    table.data tr:nth-child(even) td { background: #F7FBFD; }
    table.data tr:hover td {      background: var(--c-primary-soft);
    }
    .dash-note {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 24px;
    }
    .dash-note h3 { margin-bottom: 10px; }
    .dash-note p { font-size: 14px; margin-bottom: 12px; }
    .dash-note ul { display: grid; gap: 8px; }
    .dash-note li { font-size: 14px; color: var(--text-2); padding-left: 16px; position: relative; }
    .dash-note li::before {
      content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--c-accent);
      position: absolute; left: 0; top: 9px;
    }

    .city-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
    .city-chip {
      min-height: 40px; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border);
      background: #fff; color: var(--text-2); font-size: 14px; font-weight: 500;
    }
    .city-chip.is-on { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

    .flash {
      background: linear-gradient(180deg, #EEF6FA, #F5F8FB); border-block: 1px solid var(--border-soft);
    }
    .flash-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; }
    .countdown {
      display: flex; align-items: center; gap: 8px; background: #fff; border: 1px solid var(--border);
      border-radius: 10px; padding: 10px 14px; box-shadow: var(--shadow);
    }
    .countdown b {
      min-width: 44px; min-height: 44px; display: grid; place-items: center; background: var(--bg-dark);
      color: #fff; border-radius: 8px; font-variant-numeric: tabular-nums; font-size: 18px;
    }
    .countdown span { color: var(--text-3); font-size: 13px; }
    .flash-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
    .flash-card {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column;
    }
    .flash-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
    .flash-card div { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
    .stock {
      display: inline-flex; align-items: center; gap: 6px; color: #B45309; background: #FEF3C7;
      border-radius: 4px; padding: 4px 8px; font-size: 12px; font-weight: 700; margin-bottom: 8px;
    }
    .flash-card .btn { margin-top: auto; }
    .flash-btns { display: flex; gap: 10px; margin-top: 12px; }

    .faq-list { display: grid; gap: 12px; max-width: 920px; }
    .faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
    .faq-q {
      width: 100%; text-align: left; min-height: 56px; padding: 16px 20px; display: flex; justify-content: space-between;
      align-items: center; gap: 16px; font-weight: 600; color: var(--text); background: #fff;
    }
    .faq-q:hover { color: var(--c-primary); }
    .faq-q::after {
      content: ""; width: 10px; height: 10px; border-right: 2px solid var(--c-primary); border-bottom: 2px solid var(--c-primary);
      transform: rotate(45deg); transition: transform .2s ease; flex-shrink: 0; margin-top: -4px;
    }
    .faq-item.is-open .faq-q::after { transform: rotate(225deg); margin-top: 4px; }
    .faq-a { display: none; padding: 0 20px 18px; color: var(--text-2); font-size: 15px; line-height: 1.8; }
    .faq-item.is-open .faq-a { display: block; }

    .cta {
      background: var(--bg-dark) center/cover no-repeat; position: relative; padding: 88px 0;
    }
    .cta::before {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(12,34,48,.94), rgba(18,48,68,.82));
    }
    .cta .container { position: relative; z-index: 1; display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
    .cta h2, .cta p, .cta li { color: rgba(244,248,251,.88); }
    .cta h2 { color: #fff; font-size: 30px; }
    .cta-side { color: rgba(244,248,251,.8); }
    .cta-side a { color: #fff; }
    .form {
      background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-hover);
    }
    .form-row { margin-bottom: 14px; }
    .form label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
    .form input, .form select, .form textarea {
      width: 100%; min-height: 44px; border: 1px solid var(--border); border-radius: 8px;
      background: #F7FBFD; padding: 10px 12px; color: var(--text);
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .form textarea { min-height: 96px; resize: vertical; }
    .form input:focus, .form select:focus, .form textarea:focus {
      border-color: var(--c-primary); background: #fff; box-shadow: 0 0 0 3px rgba(30,111,159,.16); outline: none;
    }
    .form .err { color: var(--danger); font-size: 12px; margin-top: 4px; }
    .form .is-bad { border-color: var(--danger); background: #FFF7F7; }
    .form-ok { background: var(--c-accent-soft); color: var(--c-accent-dark); padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
    .form-fail { background: #FDECEC; color: var(--danger); padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }

    .site-footer { background: #0C2230; color: rgba(244,248,251,.78); padding: 56px 0 24px; }
    .foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.1fr 1fr; gap: 28px; margin-bottom: 36px; }
    .site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 14px; }
    .site-footer a { color: rgba(244,248,251,.78); }
    .site-footer a:hover { color: #fff; }
    .foot-nav a, .foot-contact p { display: block; min-height: 36px; }
    .copyright {
      border-top: 1px solid rgba(255,255,255,.1); padding-top: 18px; font-size: 13px; color: rgba(244,248,251,.55);
      display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
    }
    .sonar {
      pointer-events: none; position: absolute; inset: auto -80px -80px auto; width: 320px; height: 320px; opacity: .08;
      background: radial-gradient(circle, transparent 40%, #1E6F9F 41%, transparent 42%, transparent 58%, #1E6F9F 59%, transparent 60%);
    }

    @media (max-width: 1200px) {
      h1 { font-size: 40px; }
      .section { padding: 88px 0; }
      .cat-grid, .spec-grid, .ability-grid, .model-grid, .flash-track, .guard { grid-template-columns: 1fr 1fr; }
      .stats { grid-template-columns: repeat(3, 1fr); gap: 20px 12px; }
    }
    @media (max-width: 992px) {
      h1 { font-size: 34px; }
      h2 { font-size: 26px; }
      .nav-links, .nav-cta { display: none; }
      .nav-toggle { display: inline-flex; }
      .hero-grid, .pain-wrap, .split, .split.reverse, .spec-grid, .rank-wrap, .dark-grid, .story-grid, .result-wrap, .dash, .cta .container, .foot-grid, .news-grid {
        grid-template-columns: 1fr; direction: ltr;
      }
      .story-main { grid-template-columns: 1fr; }
      .scene { grid-template-columns: 1fr; }
      .review:nth-child(2) { transform: none; }
      .hero { min-height: 0; }
      .preview img, .frame img, .pain-photo img { height: 260px; min-height: 0; }
      .steps { grid-template-columns: 1fr 1fr; }
      .stats { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      :root { --section-y: 72px; }
      .topbar { display: none; }
      h1 { font-size: 30px; }
      .container { width: min(100% - 28px, var(--container)); }
      .cat-grid, .ability-grid, .model-grid, .flash-track, .guard, .review-grid, .steps, .result-grid { grid-template-columns: 1fr; }
      .news-card.small { grid-template-columns: 1fr; }
      .rank-item { grid-template-columns: 42px 1fr; }
      .rank-tag { grid-column: 2; }
      .hero .container { padding: 48px 0; }
      .cta { padding: 64px 0; }
      .copyright { flex-direction: column; }
    }
    @media (max-width: 375px) {
      h1 { font-size: 28px; }
      h2 { font-size: 24px; }
      .btn { width: 100%; }
      .flash-btns { flex-direction: column; }
      .countdown { width: 100%; justify-content: space-between; }
      .stats { grid-template-columns: 1fr 1fr; }
      body { overflow-x: hidden; }
    }