/* roulang page: index */
:root {
      --c-primary: #1F6FB2;
      --c-primary-hover: #185A91;
      --c-accent: #0F8A80;
      --c-cta: #C67A2F;
      --c-cta-hover: #A86524;
      --c-danger: #C0453A;
      --bg: #F5F8FC;
      --bg-card: #FFFFFF;
      --bg-muted: #EEF3F9;
      --bg-dark: #1C2B3A;
      --text: #243140;
      --text-muted: #5B6B7C;
      --text-inv: #F8FBFF;
      --border: #D7E3EF;
      --shadow: 0 10px 28px rgba(28, 43, 58, .08);
      --shadow-hover: 0 16px 36px rgba(31, 111, 178, .14);
      --radius: 10px;
      --radius-sm: 8px;
      --radius-badge: 4px;
      --container: 1200px;
      --header-h: 64px;
      --bar-h: 58px;
      --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      --ease: .22s ease;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html.lock { overflow: hidden; }
    body {
      margin: 0;
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--bg);
      padding-bottom: var(--bar-h);
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--c-primary); text-decoration: none; transition: color var(--ease); }
    a:hover { color: var(--c-primary-hover); }
    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; }
    button { cursor: pointer; }
    h1, h2, h3, h4 { margin: 0 0 12px; font-weight: 700; line-height: 1.28; color: var(--text); }
    h1 { font-size: 42px; letter-spacing: .02em; }
    h2 { font-size: 30px; font-weight: 650; }
    h3 { font-size: 20px; font-weight: 650; }
    p { margin: 0 0 14px; }
    ul { margin: 0; padding: 0; list-style: none; }
    table { border-collapse: collapse; width: 100%; }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .skip {
      position: absolute; left: -999px; top: 8px;
    }
    .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
    .badge {
      display: inline-flex; align-items: center; gap: 6px;
      height: 26px; padding: 0 10px; border-radius: var(--radius-badge);
      background: rgba(15, 138, 128, .1); color: var(--c-accent);
      font-size: 12px; font-weight: 600; letter-spacing: .04em;
    }
    .badge-blue { background: rgba(31, 111, 178, .1); color: var(--c-primary); }
    .badge-copper { background: rgba(198, 122, 47, .12); color: var(--c-cta); }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 20px; border-radius: var(--radius-sm);
      border: 1px solid transparent; font-size: 15px; font-weight: 600;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
      text-decoration: none; white-space: nowrap;
    }
    .btn-primary { background: var(--c-cta); color: #fff; box-shadow: 0 8px 18px rgba(198, 122, 47, .22); }
    .btn-primary:hover { background: var(--c-cta-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 24px rgba(198, 122, 47, .28); }
    .btn-primary:active { transform: translateY(0); }
    .btn-secondary { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
    .btn-secondary:hover { background: var(--c-primary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
    .btn-ghost { background: transparent; color: var(--text-inv); border-color: rgba(248, 251, 255, .4); }
    .btn-ghost:hover { background: rgba(248, 251, 255, .1); color: #fff; }
    .section { padding: 88px 0; position: relative; }
    .section-muted { background: var(--bg-muted); }
    .section-white { background: var(--bg-card); }
    .section-head { max-width: 760px; margin-bottom: 36px; }
    .section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
    .section-kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--c-primary); font-size: 13px; font-weight: 700; letter-spacing: .08em;
      margin-bottom: 10px;
    }
    .section-kicker::before {
      content: ""; width: 18px; height: 2px; background: var(--c-cta);
    }
    .lead { color: var(--text-muted); font-size: 16px; }
    .card {
      background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 26px; transition: transform var(--ease), box-shadow var(--ease);
    }
    .card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
    .card-bar { border-top: 3px solid var(--c-primary); }
    .card-bar-copper { border-top: 3px solid var(--c-cta); }
    .card-bar-teal { border-top: 3px solid var(--c-accent); }
    .tick-bg {
      background-image:
        linear-gradient(90deg, rgba(31, 111, 178, .045) 1px, transparent 1px),
        linear-gradient(rgba(31, 111, 178, .045) 1px, transparent 1px);
      background-size: 28px 28px;
    }
    .topbar {
      height: 38px; background: #EAF1F8; border-bottom: 1px solid var(--border);
      font-size: 12px; color: var(--text-muted);
    }
    .topbar .container { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
    .top-trust { display: flex; align-items: center; gap: 8px; color: var(--text); font-weight: 600; }
    .top-trust i { width: 6px; height: 6px; border-radius: 50%; background: var(--c-accent); display: inline-block; }
    .top-actions { display: flex; align-items: center; gap: 18px; }
    .top-actions a { color: var(--text-muted); }
    .top-actions a:hover { color: var(--c-primary); }
    .mainbar {
      height: var(--header-h); background: #fff; border-bottom: 1px solid var(--border);
      position: sticky; top: 0; z-index: 1000;
    }
    .mainbar .container { height: 100%; display: flex; align-items: center; gap: 24px; }
    .logo { display: flex; align-items: center; gap: 10px; color: var(--text); flex-shrink: 0; }
    .logo:hover { color: var(--text); }
    .logo-mark {
      width: 36px; height: 36px; border-radius: 8px; background: var(--c-primary);
      display: grid; place-items: center; position: relative;
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.18);
    }
    .logo-mark svg { width: 22px; height: 22px; display: block; }
    .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(--c-primary); font-weight: 650; letter-spacing: .12em; }
    .nav-desk { display: flex; align-items: center; gap: 4px; margin-left: auto; }
    .nav-desk a {
      position: relative; padding: 8px 10px; color: var(--text); font-size: 14px; font-weight: 600;
    }
    .nav-desk a:hover { color: var(--c-primary); }
    .nav-desk a.active { color: var(--c-primary); }
    .nav-desk a.active::after, .nav-desk a:hover::after {
      content: ""; position: absolute; left: 10px; right: 10px; bottom: 4px; height: 2px; background: var(--c-primary);
    }
    .nav-cta { margin-left: 8px; flex-shrink: 0; }
    .hamburger {
      display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--border);
      border-radius: 8px; background: #fff; padding: 10px;
    }
    .hamburger span { display: block; height: 2px; background: var(--text); margin: 6px 0; }
    .drawer {
      position: fixed; inset: 0 0 0 auto; width: min(86vw, 360px); background: #fff;
      z-index: 2000; transform: translateX(100%); transition: transform .28s ease;
      box-shadow: -16px 0 40px rgba(28,43,58,.12); display: flex; flex-direction: column;
      padding: 24px 20px 32px;
    }
    .drawer.open { transform: translateX(0); }
    .drawer-mask {
      position: fixed; inset: 0; background: rgba(28,43,58,.38); z-index: 1500;
      opacity: 0; pointer-events: none; transition: opacity .28s ease;
    }
    .drawer-mask.show { opacity: 1; pointer-events: auto; }
    .drawer a { display: block; padding: 12px 8px; color: var(--text); font-weight: 650; border-bottom: 1px solid var(--border); }
    .drawer a.active { color: var(--c-primary); }
    .drawer-close {
      width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 8px; background: #fff; align-self: flex-end;
    }
    .hero {
      position: relative; height: min(76vh, 760px); min-height: 560px; overflow: hidden; color: var(--text-inv);
    }
    .slides { position: absolute; inset: 0; }
    .slide { position: absolute; inset: 0; opacity: 0; transition: opacity .7s ease; }
    .slide.active { opacity: 1; z-index: 1; }
    .slide img { width: 100%; height: 100%; object-fit: cover; }
    .slide-mask {
      position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(28,43,58,.72) 0%, rgba(28,43,58,.46) 48%, rgba(28,43,58,.22) 100%),
        repeating-linear-gradient(90deg, transparent 0 27px, rgba(248,251,255,.05) 27px 28px);
    }
    .hero-content {
      position: relative; z-index: 2; height: 100%; display: flex; flex-direction: column; justify-content: center;
      padding: 48px 0 110px;
    }
    .brand-chip {
      display: inline-flex; align-items: center; gap: 8px; margin-bottom: 16px;
      padding: 4px 10px 4px 4px; border: 1px solid rgba(248,251,255,.28); border-radius: 4px;
      background: rgba(28,43,58,.28); font-size: 13px; font-weight: 650; color: var(--text-inv);
      width: fit-content;
    }
    .brand-chip b { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 4px; background: var(--c-cta); font-size: 11px; }
    .hero h1, .hero .slide-title { font-size: 42px; color: var(--text-inv); max-width: 760px; margin-bottom: 14px; }
    .hero-lead { max-width: 680px; color: rgba(248,251,255,.88); margin-bottom: 22px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
    .hero-spec { display: flex; flex-wrap: wrap; gap: 10px; }
    .hero-spec span {
      border: 1px solid rgba(248,251,255,.22); background: rgba(28,43,58,.3);
      border-radius: 4px; padding: 4px 10px; font-size: 13px;
    }
    .countbar {
      position: absolute; left: 0; right: 0; bottom: 0; z-index: 3;
      background: rgba(28,43,58,.78); border-top: 1px solid rgba(248,251,255,.12);
    }
    .countbar .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; }
    .count-label { font-size: 14px; color: rgba(248,251,255,.86); }
    .count-label strong { color: #fff; display: block; font-size: 16px; }
    .timers { display: flex; gap: 10px; }
    .timers b {
      min-width: 54px; background: rgba(198,122,47,.95); color: #fff; border-radius: 8px;
      display: flex; flex-direction: column; align-items: center; padding: 6px 8px; line-height: 1.1;
    }
    .timers b span { font-size: 20px; font-variant-numeric: tabular-nums; }
    .timers b small { font-size: 11px; font-weight: 500; opacity: .9; }
    .hero-ctrl { position: absolute; right: 24px; bottom: 88px; z-index: 4; display: flex; align-items: center; gap: 10px; }
    .dots { display: flex; gap: 8px; }
    .dots button {
      width: 28px; height: 4px; border: 0; border-radius: 2px; background: rgba(248,251,255,.35); padding: 0;
    }
    .dots button.active { background: var(--c-cta); }
    .pause-btn {
      width: 36px; height: 36px; border-radius: 8px; border: 1px solid rgba(248,251,255,.3);
      background: rgba(28,43,58,.4); color: #fff;
    }
    .kpi {
      background: var(--bg-muted); border-bottom: 1px solid var(--border);
      padding: 28px 0;
    }
    .kpi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .kpi-item {
      display: grid; grid-template-columns: 48px 1fr; gap: 14px; align-items: center;
      padding: 8px 4px;
    }
    .kpi-ico {
      width: 48px; height: 48px; border-radius: 8px; display: grid; place-items: center;
      background: #fff; border: 1px solid var(--border); color: var(--c-primary);
    }
    .kpi-item h3 { font-size: 16px; margin: 0 0 2px; }
    .kpi-item p { margin: 0; color: var(--text-muted); font-size: 14px; }
    .split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
    .media { position: relative; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--border); }
    .media img { width: 100%; height: 420px; object-fit: cover; }
    .media-cap {
      position: absolute; left: 16px; bottom: 16px; background: rgba(28,43,58,.82); color: #fff;
      padding: 8px 12px; border-radius: 8px; font-size: 13px;
    }
    .spec-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }
    .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .adv-card h3 { font-size: 18px; }
    .adv-card li {
      position: relative; padding-left: 16px; color: var(--text-muted); font-size: 14px; margin: 8px 0;
    }
    .adv-card li::before {
      content: ""; position: absolute; left: 0; top: 9px; width: 7px; height: 2px; background: var(--c-accent);
    }
    .scene-wrap { display: grid; grid-template-columns: 240px 1fr; gap: 28px; align-items: start; }
    .scene-nav { position: sticky; top: 88px; display: flex; flex-direction: column; gap: 8px; }
    .scene-nav button {
      text-align: left; min-height: 48px; border: 1px solid var(--border); background: #fff; border-radius: 8px;
      padding: 10px 14px; color: var(--text); font-weight: 650;
    }
    .scene-nav button[aria-selected="true"] {
      border-color: var(--c-primary); color: var(--c-primary); box-shadow: var(--shadow);
      border-left: 3px solid var(--c-primary);
    }
    .scene-panel { display: none; background: #fff; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
    .scene-panel.active { display: grid; grid-template-columns: 1.1fr .9fr; }
    .scene-panel img { width: 100%; height: 100%; min-height: 360px; object-fit: cover; }
    .scene-copy { padding: 32px; }
    .scene-copy ul { margin: 16px 0 22px; }
    .scene-copy li { padding-left: 18px; position: relative; color: var(--text-muted); margin: 8px 0; }
    .scene-copy li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--c-cta); position: absolute; left: 0; top: 10px; }
    .prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .prod-card { padding: 0; overflow: hidden; }
    .prod-card img { width: 100%; height: 210px; object-fit: cover; }
    .prod-body { padding: 22px 24px 24px; }
    .spec-table { width: 100%; font-size: 14px; margin: 12px 0 18px; }
    .spec-table th { text-align: left; color: var(--text-muted); font-weight: 500; width: 36%; padding: 6px 0; border-bottom: 1px dashed var(--border); }
    .spec-table td { padding: 6px 0; border-bottom: 1px dashed var(--border); font-weight: 650; }
    .cases {
      background: var(--bg-dark) url("/assets/images/83a7540b31b6c18f.jpg") center/cover no-repeat;
      color: var(--text-inv); padding: 92px 0;
    }
    .cases .overlay-wrap { position: relative; }
    .cases::before {
      content: ""; position: absolute; inset: 0; background: rgba(28,43,58,.82);
    }
    .cases .container { position: relative; z-index: 1; display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: center; }
    .case-num { font-size: 88px; line-height: .9; color: var(--c-cta); font-weight: 700; font-variant-numeric: tabular-nums; }
    .case-num small { display: block; font-size: 16px; color: rgba(248,251,255,.75); font-weight: 500; margin-top: 10px; }
    .cases h2, .cases p, .cases h3 { color: var(--text-inv); }
    .case-list { display: grid; gap: 16px; }
    .case-item { background: rgba(248,251,255,.06); border: 1px solid rgba(248,251,255,.12); border-radius: 10px; padding: 20px 22px; }
    .case-item h3 { font-size: 18px; margin-bottom: 6px; }
    .case-item p { margin: 0; color: rgba(248,251,255,.78); }
    .table-wrap { overflow: auto; border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); background: #fff; }
    .compare-table { min-width: 720px; }
    .compare-table th, .compare-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
    .compare-table thead th { background: #E8EEF5; color: var(--text); font-weight: 700; position: sticky; top: 0; }
    .compare-table tbody tr:nth-child(even) { background: #F8FBFE; }
    .compare-table tbody th { background: #F0F5FA; font-weight: 700; color: var(--c-primary); width: 160px; }
    .mobile-compare { display: none; }
    .compare-cta { margin-top: 22px; }
    .story { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; align-items: center; margin-bottom: 42px; }
    .story.reverse { grid-template-columns: 1.1fr .9fr; }
    .story.reverse .story-media { order: 2; }
    .story img { width: 100%; height: 320px; object-fit: cover; border-radius: 12px; box-shadow: var(--shadow); }
    .story-meta { font-size: 13px; color: var(--c-accent); font-weight: 700; margin-bottom: 8px; }
    .stats { background: #fff; border-block: 1px solid var(--border); padding: 42px 0; }
    .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
    .stat {
      text-align: center; padding: 8px 12px; border-right: 1px solid rgba(31,111,178,.22);
    }
    .stat:last-child { border-right: 0; }
    .stat b { display: block; font-size: 36px; color: var(--c-cta); line-height: 1.1; }
    .stat span { color: var(--text-muted); font-size: 14px; }
    .review-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .review p { color: var(--text-muted); font-size: 14px; min-height: 96px; }
    .review-user { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
    .avatar {
      width: 36px; height: 36px; border-radius: 8px; background: var(--c-primary); color: #fff;
      display: grid; place-items: center; font-size: 13px; font-weight: 700;
    }
    .review-user small { display: block; color: var(--text-muted); font-size: 12px; }
    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .news-card { padding: 0; overflow: hidden; }
    .news-card img { width: 100%; height: 190px; object-fit: cover; }
    .news-card .prod-body { padding: 20px 22px 22px; }
    .news-card time { font-size: 12px; color: var(--c-primary); font-weight: 700; }
    .custom-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; }
    .steps { display: grid; gap: 12px; }
    .step {
      display: grid; grid-template-columns: 48px 1fr; gap: 14px; background: #fff;
      border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px;
    }
    .step b {
      width: 48px; height: 48px; border-radius: 8px; background: var(--bg-muted); color: var(--c-primary);
      display: grid; place-items: center; font-variant-numeric: tabular-nums;
    }
    .step h3 { font-size: 16px; margin: 0 0 4px; }
    .step p { margin: 0; color: var(--text-muted); font-size: 14px; }
    .side-box { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 24px; box-shadow: var(--shadow); }
    .side-box li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
    .side-box li span { color: var(--text-muted); }
    .test-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 32px; align-items: center; }
    .check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .check {
      background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 16px 16px 16px 18px;
      border-left: 3px solid var(--c-accent);
    }
    .check h3 { font-size: 16px; margin-bottom: 4px; }
    .check p { margin: 0; color: var(--text-muted); font-size: 14px; }
    .faq-list { display: grid; gap: 10px; max-width: 920px; }
    .faq-item { background: #fff; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
    .faq-item button {
      width: 100%; min-height: 56px; text-align: left; background: #fff; border: 0;
      padding: 0 48px 0 20px; font-size: 16px; font-weight: 650; color: var(--text); position: relative;
    }
    .faq-item button::after {
      content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); color: var(--c-primary); font-size: 20px;
    }
    .faq-item button[aria-expanded="true"] { color: var(--c-primary); }
    .faq-item button[aria-expanded="true"]::after { content: "–"; }
    .faq-panel { display: none; background: var(--bg-muted); padding: 4px 20px 18px; color: var(--text-muted); }
    .faq-item.is-open .faq-panel { display: block; }
    .guarantee { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .g-item {
      display: grid; grid-template-columns: 42px 1fr; gap: 12px; align-items: start;
      background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 18px;
    }
    .g-item svg { color: var(--c-accent); }
    .g-item h3 { font-size: 16px; margin-bottom: 4px; }
    .g-item p { margin: 0; color: var(--text-muted); font-size: 14px; }
    .contact-box { display: grid; grid-template-columns: .85fr 1.15fr; gap: 36px; align-items: start; }
    .promise { margin: 18px 0 0; }
    .promise li { padding: 10px 0 10px 22px; position: relative; color: var(--text-muted); }
    .promise li::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: var(--c-accent); position: absolute; left: 0; top: 16px; }
    form { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 26px; box-shadow: var(--shadow); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 650; }
    input, select, textarea {
      height: 44px; border: 1px solid var(--border); border-radius: 8px; padding: 0 12px; background: #fff; color: var(--text);
    }
    textarea { height: 110px; padding: 10px 12px; resize: vertical; }
    input.err, select.err, textarea.err { border-color: var(--c-danger); }
    .err-txt { color: var(--c-danger); font-size: 12px; min-height: 16px; }
    .form-ok {
      display: none; background: rgba(15,138,128,.1); color: var(--c-accent); border: 1px solid rgba(15,138,128,.25);
      border-radius: 8px; padding: 12px 14px; margin-bottom: 12px; font-weight: 650;
    }
    .form-ok.show { display: block; }
    footer { background: #16222E; color: rgba(248,251,255,.78); padding: 56px 0 120px; }
    .foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.1fr; gap: 28px; }
    .foot-brand .logo-text strong, .foot-brand .logo-text span { color: #fff; }
    footer h3 { color: #fff; font-size: 16px; margin-bottom: 14px; }
    footer a { color: rgba(248,251,255,.78); display: block; margin: 8px 0; }
    footer a:hover { color: #fff; }
    .foot-copy { margin-top: 28px; padding-top: 18px; border-top: 1px solid rgba(248,251,255,.1); font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
    .fixbar {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 900;
      background: #fff; border-top: 1px solid var(--border); box-shadow: 0 -8px 24px rgba(28,43,58,.08);
      min-height: var(--bar-h);
    }
    .fixbar .container { min-height: var(--bar-h); display: flex; align-items: center; justify-content: space-between; gap: 12px; }
    .fix-left { display: flex; align-items: center; gap: 14px; font-weight: 700; }
    .fix-left a { color: var(--c-primary); }
    .fix-left small { display: block; color: var(--text-muted); font-weight: 500; }
    section[id] { scroll-margin-top: 84px; }
    @media (max-width: 1280px) {
      h1, .hero h1, .hero .slide-title { font-size: 38px; }
    }
    @media (max-width: 1024px) {
      .nav-desk, .nav-cta { display: none; }
      .hamburger { display: inline-block; }
      .split, .scene-wrap, .scene-panel.active, .cases .container, .custom-grid, .test-grid, .contact-box, .story, .story.reverse { grid-template-columns: 1fr; }
      .story.reverse .story-media { order: 0; }
      .adv-grid, .review-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
      .prod-grid { grid-template-columns: 1fr; }
      .stats-grid, .guarantee { grid-template-columns: repeat(2, 1fr); }
      .stat { border-right: 0; border-bottom: 1px solid rgba(31,111,178,.18); padding: 18px 8px; }
      .scene-nav { position: static; flex-direction: row; overflow: auto; }
      .scene-nav button { white-space: nowrap; }
      .scene-panel img { min-height: 240px; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .media img, .story img { height: 280px; }
      .hero { min-height: 620px; }
    }
    @media (max-width: 768px) {
      .section { padding: 56px 0; }
      .container { width: min(100% - 28px, var(--container)); }
      h1, .hero h1, .hero .slide-title { font-size: 30px; }
      h2 { font-size: 24px; }
      .kpi-grid, .adv-grid, .review-grid, .news-grid, .check-grid, .form-grid, .foot-grid { grid-template-columns: 1fr; }
      .top-actions span, .top-actions .hide-sm { display: none; }
      .countbar .container { flex-direction: column; align-items: flex-start; padding: 12px 0; }
      .hero-content { padding-bottom: 150px; }
      .hero-ctrl { right: 16px; bottom: 132px; }
      .table-wrap { display: none; }
      .mobile-compare { display: grid; gap: 12px; }
      .fix-left small { display: none; }
      .case-num { font-size: 64px; }
      .guarantee { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .hero { height: auto; min-height: 640px; }
      .hero-actions .btn { width: 100%; }
      .timers b { min-width: 46px; }
      .prod-card img, .news-card img { height: 180px; }
      .fixbar .container { gap: 8px; }
      .fix-left { font-size: 14px; }
      .btn { min-height: 44px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { transition: none !important; animation: none !important; }
    }

/* roulang page: index */
:root {
      --blue: #1F6FB2;
      --blue-hover: #185A91;
      --teal: #0F8A80;
      --copper: #C67A2F;
      --copper-hover: #A86424;
      --bg: #F5F8FC;
      --white: #FFFFFF;
      --section: #EEF3F9;
      --dark: #1C2B3A;
      --text: #243140;
      --muted: #5B6B7C;
      --inverse: #F8FBFF;
      --border: #D7E3EF;
      --danger: #C4453C;
      --ok: #0F8A80;
      --shadow: 0 10px 28px rgba(28, 43, 58, .08);
      --shadow-hover: 0 16px 36px rgba(31, 111, 178, .14);
      --radius: 10px;
      --radius-sm: 8px;
      --radius-badge: 4px;
      --container: 1200px;
      --topbar-h: 38px;
      --nav-h: 64px;
      --bar-h: 58px;
      --space: 88px;
      --space-m: 56px;
      --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; overflow-x: clip; }
    body {
      margin: 0;
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--bg);
      padding-bottom: calc(var(--bar-h) + env(safe-area-inset-bottom));
    }
    body.nav-open { overflow: hidden; }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--blue); text-decoration: none; }
    a:hover { color: var(--blue-hover); }
    button, input, select, textarea { font-family: inherit; font-size: 16px; }
    button { cursor: pointer; }
    h1, h2, h3, h4 { margin: 0 0 .6em; font-weight: 650; line-height: 1.28; color: var(--text); letter-spacing: 0; }
    h1 { font-size: clamp(28px, 4vw, 46px); font-weight: 700; }
    h2 { font-size: clamp(22px, 2.4vw, 32px); font-weight: 700; }
    h3 { font-size: 18px; font-weight: 650; }
    p { margin: 0 0 1em; color: var(--muted); }
    ul { margin: 0; padding: 0; list-style: none; }
    table { border-collapse: collapse; width: 100%; }
    :focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
    .skip {
      position: absolute; left: -999px; top: 0;
      background: var(--copper); color: #fff; padding: 8px 14px; z-index: 200;
    }
    .skip:focus { left: 12px; top: 12px; }
    .container { width: min(100% - 32px, var(--container)); margin: 0 auto; }
    .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
    .muted { color: var(--muted); }
    .topbar {
      height: var(--topbar-h);
      background: #E8F0F8;
      border-bottom: 1px solid var(--border);
      font-size: 12px;
      color: var(--muted);
      display: flex; align-items: center;
    }
    .topbar .container {
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
      width: min(100% - 24px, var(--container));
    }
    .topbar-trust {
      display: flex; align-items: center; gap: 8px; white-space: nowrap; overflow: hidden;
      color: var(--text);
    }
    .topbar-trust .dot {
      width: 6px; height: 6px; border-radius: 50%; background: var(--teal); flex: none;
    }
    .topbar-tools { display: flex; align-items: center; gap: 14px; flex: none; }
    .topbar-tools a { color: var(--text); }
    .topbar-tools a:hover { color: var(--blue); }
    .topbar-cta { color: var(--blue) !important; font-weight: 650; }
    .site-header { position: relative; z-index: 60; }
    .nav-main {
      height: var(--nav-h);
      background: var(--white);
      border-bottom: 1px solid var(--border);
      position: sticky; top: 0; z-index: 70;
    }
    .nav-main.is-stuck { box-shadow: 0 8px 20px rgba(28, 43, 58, .06); }
    .nav-inner {
      height: 100%;
      display: flex; align-items: center; justify-content: space-between; gap: 18px;
    }
    .logo {
      display: flex; align-items: center; gap: 10px; color: var(--text); flex: none;
    }
    .logo:hover { color: var(--text); }
    .logo-mark {
      width: 36px; height: 36px; flex: none;
    }
    .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: 11px; color: var(--blue); font-weight: 650; letter-spacing: .08em; }
    .nav-links { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: center; }
    .nav-links a {
      color: var(--text); font-size: 14px; padding: 8px 10px; position: relative; font-weight: 500;
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 10px; right: 10px; bottom: 4px; height: 2px;
      background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .2s ease;
    }
    .nav-links a:hover { color: var(--blue); }
    .nav-links a.is-active { color: var(--blue); font-weight: 650; }
    .nav-links a.is-active::after, .nav-links a:hover::after { transform: scaleX(1); }
    .nav-cta { flex: none; }
    .menu-toggle {
      display: none; width: 44px; height: 44px; border: 1px solid var(--border);
      background: var(--white); border-radius: var(--radius-sm); align-items: center; justify-content: center;
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      display: block; width: 18px; height: 2px; background: var(--text); position: relative;
    }
    .menu-toggle span::before, .menu-toggle span::after {
      content: ""; position: absolute; left: 0;
    }
    .menu-toggle span::before { top: -6px; }
    .menu-toggle span::after { top: 6px; }
    .drawer-mask {
      display: none; position: fixed; inset: 0; background: rgba(28, 43, 58, .35); z-index: 80;
    }
    body.nav-open .drawer-mask { display: block; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 18px; border-radius: var(--radius-sm); border: 1px solid transparent;
      font-weight: 650; font-size: 14px; line-height: 1; transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
      white-space: nowrap;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(0); }
    .btn-copper {
      background: var(--copper); color: #fff; box-shadow: 0 8px 18px rgba(198, 122, 47, .22);
    }
    .btn-copper:hover { background: var(--copper-hover); color: #fff; box-shadow: 0 12px 24px rgba(198, 122, 47, .28); }
    .btn-line {
      background: #fff; color: var(--blue); border-color: var(--blue);
    }
    .btn-line:hover { background: #F3F8FC; color: var(--blue-hover); border-color: var(--blue-hover); }
    .btn-ghost { background: transparent; color: var(--inverse); border-color: rgba(248, 251, 255, .4); }
    .btn-ghost:hover { background: rgba(248, 251, 255, .08); color: #fff; }
    .btn-teal {
      background: transparent; color: var(--teal); border-color: var(--teal);
    }
    .btn-teal:hover { background: rgba(15, 138, 128, .08); color: #0C6E66; }
    .hero {
      position: relative;
      height: min(76vh, 760px);
      min-height: 560px;
      overflow: hidden;
      background: var(--dark);
    }
    .hero-track { position: absolute; inset: 0; }
    .hero-slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .7s ease, visibility .7s ease;
    }
    .hero-slide.is-on { opacity: 1; visibility: visible; }
    .hero-slide img {
      width: 100%; height: 100%; object-fit: cover; filter: saturate(.92) contrast(1.05);
    }
    .hero-mask {
      position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(28, 43, 58, .72) 0%, rgba(28, 43, 58, .48) 46%, rgba(28, 43, 58, .22) 100%),
        linear-gradient(180deg, rgba(28, 43, 58, .18), rgba(28, 43, 58, .45));
    }
    .hero-copy {
      position: relative; z-index: 2; height: 100%;
      display: flex; flex-direction: column; justify-content: center;
      padding: 48px 0 92px;
      max-width: 720px; color: var(--inverse);
    }
    .hero-kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: #D6E7F5; font-size: 13px; font-weight: 650; margin-bottom: 12px;
    }
    .hero-kicker i {
      width: 28px; height: 2px; background: var(--copper); display: inline-block;
    }
    .hero h1, .hero .hero-title { color: #fff; margin-bottom: 14px; }
    .hero-lead { color: #D7E2EC; font-size: 16px; line-height: 1.8; max-width: 640px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
    .hero-controls {
      position: absolute; left: 0; right: 0; bottom: 18px; z-index: 3;
    }
    .hero-controls .container {
      display: flex; align-items: flex-end; justify-content: space-between; gap: 16px;
    }
    .hero-dots { display: flex; gap: 8px; align-items: center; }
    .hero-dots button {
      width: 28px; height: 4px; border: 0; border-radius: 2px; background: rgba(248, 251, 255, .35); padding: 0;
    }
    .hero-dots button.is-on { background: var(--copper); width: 36px; }
    .hero-pause {
      width: 44px; height: 32px; border: 1px solid rgba(248, 251, 255, .35);
      background: rgba(28, 43, 58, .35); color: #fff; border-radius: 6px; font-size: 12px;
    }
    .countdown {
      background: rgba(28, 43, 58, .72);
      border: 1px solid rgba(215, 227, 239, .18);
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      display: flex; align-items: center; gap: 14px; color: #fff;
      backdrop-filter: blur(6px);
    }
    .countdown b { font-size: 13px; font-weight: 650; }
    .countdown span { display: block; font-size: 11px; color: #C5D2DE; }
    .ticks { display: flex; gap: 8px; }
    .tick {
      min-width: 46px; background: rgba(245, 248, 252, .1); border-radius: 6px; text-align: center; padding: 4px 6px;
    }
    .tick strong { display: block; font-size: 18px; line-height: 1.2; color: var(--copper); }
    .tick em { font-style: normal; font-size: 11px; color: #C5D2DE; }
    .section { padding: var(--space) 0; position: relative; }
    .section-alt { background: var(--section); }
    .section-white { background: var(--white); }
    .section-head { margin-bottom: 36px; max-width: 760px; }
    .section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--blue); font-size: 13px; font-weight: 650; margin-bottom: 8px;
    }
    .eyebrow::before { content: ""; width: 18px; height: 2px; background: var(--copper); }
    .cut {
      height: 12px; background:
        linear-gradient(135deg, var(--bg) 25%, transparent 25%) -8px 0 / 16px 12px,
        linear-gradient(225deg, var(--bg) 25%, transparent 25%) -8px 0 / 16px 12px;
      background-color: var(--white);
    }
    .kpi {
      margin-top: -42px; position: relative; z-index: 4; padding-top: 0; padding-bottom: 28px;
    }
    .kpi-grid {
      display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
      background: var(--white); border: 1px solid var(--border); border-radius: 12px;
      box-shadow: var(--shadow); overflow: hidden;
    }
    .kpi-item {
      padding: 22px 24px; display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start;
      border-right: 1px solid var(--border);
    }
    .kpi-item:last-child { border-right: 0; }
    .kpi-ico {
      width: 44px; height: 44px; border-radius: 8px; background: #EAF3FA; color: var(--blue);
      display: grid; place-items: center;
    }
    .kpi-item h3 { margin: 0 0 4px; font-size: 16px; }
    .kpi-item p { margin: 0; font-size: 13px; line-height: 1.55; }
    .split {
      display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center;
    }
    .media {
      position: relative; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow);
      border: 1px solid var(--border); background: #dfe7f0;
    }
    .media img { width: 100%; height: 420px; object-fit: cover; }
    .media-tag {
      position: absolute; left: 14px; bottom: 14px; background: rgba(28, 43, 58, .78); color: #fff;
      font-size: 12px; padding: 6px 10px; border-radius: var(--radius-badge);
    }
    .badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }
    .badge {
      display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px;
      border-radius: var(--radius-badge); font-size: 12px; font-weight: 650;
      background: #E8F4F2; color: var(--teal); border: 1px solid #C6E4E0;
    }
    .badge-blue { background: #E7F1F9; color: var(--blue); border-color: #C9DCEC; }
    .badge-copper { background: #F8EFE4; color: var(--copper); border-color: #EBD4B6; }
    .adv-grid {
      display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
    }
    .card {
      background: var(--white); border: 1px solid var(--border); border-radius: 12px;
      box-shadow: var(--shadow); padding: 26px; transition: transform .2s ease, box-shadow .2s ease;
      position: relative;
    }
    .card::before {
      content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
      background: var(--blue); border-radius: 12px 12px 0 0;
    }
    .card.copper-bar::before { background: var(--copper); }
    .card.teal-bar::before { background: var(--teal); }
    .card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
    .card h3 { margin-bottom: 8px; }
    .card p { font-size: 14px; margin-bottom: 12px; }
    .mini-list { display: grid; gap: 6px; }
    .mini-list li {
      position: relative; padding-left: 14px; font-size: 13px; color: var(--text); line-height: 1.55;
    }
    .mini-list li::before {
      content: ""; position: absolute; left: 0; top: 8px; width: 6px; height: 6px;
      border: 1px solid var(--teal); border-radius: 1px;
    }
    .scene-layout {
      display: grid; grid-template-columns: 240px 1fr; gap: 28px; align-items: start;
    }
    .scene-nav {
      position: sticky; top: 88px; background: var(--white); border: 1px solid var(--border);
      border-radius: 12px; padding: 10px; box-shadow: var(--shadow);
    }
    .scene-nav button {
      width: 100%; text-align: left; background: transparent; border: 0; border-radius: 8px;
      min-height: 44px; padding: 8px 12px; color: var(--text); display: flex; align-items: center; justify-content: space-between;
    }
    .scene-nav button:hover { background: #F3F8FC; color: var(--blue); }
    .scene-nav button.is-on { background: #E7F1F9; color: var(--blue); font-weight: 650; box-shadow: inset 3px 0 0 var(--blue); }
    .scene-panel { display: none; background: var(--white); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
    .scene-panel.is-on { display: grid; grid-template-columns: 1.1fr .9fr; }
    .scene-panel img { width: 100%; height: 100%; min-height: 360px; object-fit: cover; }
    .scene-body { padding: 32px; }
    .scene-body p { font-size: 15px; }
    .product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .product-card { padding: 0; overflow: hidden; }
    .product-card img { width: 100%; height: 210px; object-fit: cover; }
    .product-body { padding: 22px 24px 24px; }
    .spec-table { width: 100%; font-size: 13px; margin: 12px 0 16px; }
    .spec-table th, .spec-table td { text-align: left; padding: 6px 0; border-bottom: 1px solid var(--border); }
    .spec-table th { color: var(--muted); font-weight: 500; width: 72px; }
    .spec-table td { color: var(--text); font-weight: 650; }
    .dark-cases {
      background: var(--dark) url("/assets/images/83a7540b31b6c18f.jpg") center/cover no-repeat;
      color: var(--inverse);
    }
    .dark-cases::before {
      content: ""; position: absolute; inset: 0; background: rgba(28, 43, 58, .82);
    }
    .dark-cases .container { position: relative; z-index: 1; }
    .dark-cases h2, .dark-cases h3 { color: #fff; }
    .dark-cases p { color: #C9D6E2; }
    .case-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: center; }
    .big-metric { border-left: 3px solid var(--copper); padding-left: 22px; }
    .big-metric strong {
      display: block; font-size: clamp(48px, 7vw, 84px); line-height: 1; color: var(--copper); font-weight: 700;
    }
    .big-metric b { display: block; margin-top: 10px; font-size: 20px; color: #fff; }
    .case-list { display: grid; gap: 14px; }
    .case-item {
      background: rgba(248, 251, 255, .04); border: 1px solid rgba(215, 227, 239, .16);
      border-radius: 10px; padding: 18px 20px;
    }
    .case-item h3 { font-size: 16px; margin-bottom: 6px; }
    .case-item p { margin: 0; font-size: 14px; }
    .table-wrap {
      overflow: auto; border: 1px solid var(--border); border-radius: 12px; background: var(--white); box-shadow: var(--shadow);
    }
    .compare-table { min-width: 760px; }
    .compare-table th, .compare-table td { padding: 14px 16px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--border); }
    .compare-table thead th {
      position: sticky; top: 0; background: #E4EDF6; color: var(--text); font-weight: 700; z-index: 1;
    }
    .compare-table tbody th { background: #F7FAFD; font-weight: 650; width: 22%; }
    .compare-table tbody tr:nth-child(even) td { background: #FBFCFD; }
    .compare-mobile { display: none; gap: 12px; }
    .story {
      display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; align-items: center; margin-bottom: 40px;
    }
    .story.reverse { grid-template-columns: 1.1fr .9fr; }
    .story.reverse .story-media { order: 2; }
    .story img { width: 100%; height: 320px; object-fit: cover; border-radius: 12px; }
    .story-meta { font-size: 13px; color: var(--blue); font-weight: 650; margin-bottom: 8px; }
    .stats {
      display: grid; grid-template-columns: repeat(4, 1fr);
      background: var(--white); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow);
    }
    .stat {
      padding: 28px 20px; text-align: center; border-right: 1px solid #D3E0EE;
    }
    .stat:last-child { border-right: 0; }
    .stat strong { display: block; font-size: 34px; color: var(--blue); line-height: 1.1; }
    .stat.copper strong { color: var(--copper); }
    .stat span { display: block; margin-top: 6px; font-size: 13px; color: var(--muted); }
    .review-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .review p { color: var(--text); font-size: 14px; min-height: 96px; }
    .who { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
    .avatar {
      width: 36px; height: 36px; border-radius: 8px; background: #E7F1F9; color: var(--blue);
      display: grid; place-items: center; font-size: 12px; font-weight: 700; flex: none;
    }
    .who small { display: block; color: var(--muted); font-size: 12px; }
    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .news-card { padding: 0; overflow: hidden; }
    .news-card img { width: 100%; height: 180px; object-fit: cover; }
    .news-body { padding: 20px 22px 22px; }
    .news-body time { font-size: 12px; color: var(--teal); font-weight: 650; }
    .process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-top: 8px; }
    .step {
      background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 16px;
      position: relative;
    }
    .step i {
      display: inline-flex; min-width: 28px; height: 22px; border-radius: 4px; background: #E7F1F9;
      color: var(--blue); font-style: normal; font-size: 12px; font-weight: 700; align-items: center; justify-content: center;
      margin-bottom: 8px;
    }
    .step h3 { font-size: 15px; margin-bottom: 4px; }
    .step p { margin: 0; font-size: 13px; }
    .tier-list { display: grid; gap: 10px; }
    .tier {
      display: grid; grid-template-columns: 92px 1fr; gap: 12px; padding: 14px; border: 1px solid var(--border);
      border-radius: 10px; background: var(--white);
    }
    .tier b { color: var(--copper); font-size: 13px; }
    .test-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
    .check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
    .check {
      background: var(--white); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; font-size: 13px;
    }
    .check strong { display: block; color: var(--text); margin-bottom: 2px; }
    .faq-list { display: grid; gap: 10px; }
    .faq-item { background: var(--white); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
    .faq-item button {
      width: 100%; min-height: 56px; background: transparent; border: 0; display: flex; align-items: center; justify-content: space-between;
      padding: 12px 18px; text-align: left; font-weight: 650; color: var(--text); gap: 12px;
    }
    .faq-item button span.plus {
      width: 22px; height: 22px; border: 1px solid var(--border); border-radius: 4px; display: grid; place-items: center;
      color: var(--blue); flex: none; font-size: 16px; line-height: 1;
    }
    .faq-item .faq-a {
      display: none; padding: 0 18px 16px; background: #F6F9FC; color: var(--muted); font-size: 14px;
    }
    .faq-item.is-open .faq-a { display: block; }
    .faq-item.is-open button span.plus { background: #E7F1F9; }
    .guarantee {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
    }
    .g-item {
      display: grid; grid-template-columns: 40px 1fr; gap: 12px; align-items: start;
      background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 16px;
    }
    .g-item h3 { font-size: 15px; margin-bottom: 2px; }
    .g-item p { margin: 0; font-size: 13px; }
    .contact-box {
      display: grid; grid-template-columns: .85fr 1.15fr; gap: 36px; align-items: start;
      background: var(--white); border: 1px solid var(--border); border-radius: 12px; padding: 36px; box-shadow: var(--shadow);
    }
    .promise { display: grid; gap: 10px; margin: 18px 0 0; }
    .promise li {
      padding: 10px 12px 10px 32px; position: relative; background: #F5F9FC; border-radius: 8px; color: var(--text); font-size: 14px;
    }
    .promise li::before {
      content: ""; position: absolute; left: 12px; top: 16px; width: 10px; height: 10px; border-radius: 2px; background: var(--teal);
    }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
    .form .full { grid-column: 1 / -1; }
    label { display: block; font-size: 13px; font-weight: 650; margin-bottom: 6px; color: var(--text); }
    input, select, textarea {
      width: 100%; height: 44px; border: 1px solid var(--border); border-radius: 8px; padding: 0 12px;
      background: #fff; color: var(--text);
    }
    textarea { height: 110px; padding: 10px 12px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(31, 111, 178, .12); outline: none; }
    .err { display: none; color: var(--danger); font-size: 12px; margin-top: 4px; min-height: 18px; }
    .field.is-error input, .field.is-error select, .field.is-error textarea { border-color: var(--danger); }
    .field.is-error .err { display: block; }
    .form-ok {
      display: none; grid-column: 1 / -1; background: #E8F4F2; color: #0C6E66; border-radius: 8px; padding: 12px 14px; font-size: 14px;
    }
    .form-ok.is-show { display: block; }
    .site-footer {
      background: #162230; color: #C5D0DA; padding: 56px 0 28px; font-size: 14px;
    }
    .footer-grid { display: grid; grid-template-columns: 1.3fr .9fr .9fr 1.1fr; gap: 28px; }
    .site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
    .site-footer a { color: #C5D0DA; }
    .site-footer a:hover { color: #fff; }
    .site-footer p { color: #A9B6C2; }
    .foot-logo { display: flex; align-items: center; gap: 10px; color: #fff; margin-bottom: 12px; }
    .footer-links { display: grid; gap: 8px; }
    .copy {
      margin-top: 28px; padding-top: 18px; border-top: 1px solid rgba(215, 227, 239, .12);
      display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: space-between; font-size: 12px; color: #8EA0B0;
    }
    .dock {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
      background: var(--white); border-top: 1px solid var(--border);
      box-shadow: 0 -8px 24px rgba(28, 43, 58, .08);
      min-height: var(--bar-h); display: flex; align-items: center;
      padding-bottom: env(safe-area-inset-bottom);
    }
    .dock.is-hidden { transform: translateY(110%); }
    .dock, .dock.is-hidden { transition: transform .25s ease; }
    .dock .container { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: min(100% - 24px, var(--container)); }
    .dock-left { display: flex; align-items: center; gap: 14px; }
    .dock-left strong { display: block; font-size: 14px; }
    .dock-left a { color: var(--blue); font-weight: 700; }
    .drawer {
      position: fixed; top: 0; right: 0; width: min(86vw, 360px); height: 100%; background: #fff; z-index: 90;
      transform: translateX(102%); transition: transform .25s ease; padding: 18px 18px 32px;
      display: flex; flex-direction: column; gap: 8px; overflow: auto;
    }
    body.nav-open .drawer { transform: translateX(0); }
    .drawer a {
      min-height: 44px; display: flex; align-items: center; color: var(--text); border-bottom: 1px solid var(--border); font-weight: 650;
    }
    .lab-line {
      height: 1px; background: repeating-linear-gradient(90deg, var(--border) 0 8px, transparent 8px 12px); margin: 18px 0;
    }
    @media (max-width: 1280px) {
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .scene-panel.is-on { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 1024px) {
      .nav-links { display: none; }
      .menu-toggle { display: inline-flex; }
      .split, .case-grid, .story, .story.reverse, .test-layout, .contact-box, .scene-layout {
        grid-template-columns: 1fr;
      }
      .story.reverse .story-media { order: 0; }
      .adv-grid { grid-template-columns: 1fr 1fr; }
      .process { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .media img, .story img, .scene-panel img { height: 280px; min-height: 0; }
      .hero { height: min(78vh, 680px); }
    }
    @media (max-width: 768px) {
      :root { --space: 64px; --topbar-h: 36px; }
      .topbar-tools span.hide-sm, .topbar-trust { display: none; }
      .kpi-grid, .product-grid, .news-grid, .guarantee, .stats, .check-grid { grid-template-columns: 1fr; }
      .kpi-item { border-right: 0; border-bottom: 1px solid var(--border); }
      .review-grid { grid-template-columns: 1fr; }
      .scene-nav {
        position: static; display: flex; overflow-x: auto; gap: 8px; padding: 8px;
      }
      .scene-nav button { width: auto; flex: none; white-space: nowrap; box-shadow: none; }
      .scene-panel.is-on { grid-template-columns: 1fr; }
      .table-wrap { display: none; }
      .compare-mobile { display: grid; }
      .form { grid-template-columns: 1fr; }
      .contact-box { padding: 22px 18px; }
      .hero-copy { padding-bottom: 120px; }
      .countdown { flex-direction: column; align-items: flex-start; }
      .hero-controls .container { flex-direction: column; align-items: flex-start; }
      .dock-left span { display: none; }
    }
    @media (max-width: 520px) {
      :root { --space: 48px; }
      .container { width: min(100% - 20px, var(--container)); }
      .hero { min-height: 620px; }
      .hero-actions .btn { width: 100%; }
      .product-grid, .adv-grid, .process { grid-template-columns: 1fr; }
      .ticks { width: 100%; justify-content: space-between; }
      .stat strong { font-size: 28px; }
      .copy { flex-direction: column; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { transition: none !important; animation: none !important; }
    }