/* roulang page: index */
:root {
      --copper: #C4A265;
      --copper-deep: #A88648;
      --copper-bright: #D4B57A;
      --filament: #E0C48A;
      --graphite: #2A241F;
      --ink: #14110E;
      --ivory: #F6F1E8;
      --cream: #EDE4D4;
      --paper: #FBFOF4;
      --glow: rgba(196, 162, 101, .18);
      --glow-strong: rgba(224, 196, 138, .42);
      --text: #2A241F;
      --muted: #6B6258;
      --weak: #8A8176;
      --line: rgba(196, 162, 101, .38);
      --line-soft: rgba(42, 36, 31, .08);
      --ochre: #8A4B32;
      --white: #FFFaf3;
      --radius: 10px;
      --radius-sm: 6px;
      --shadow-warm: 0 14px 34px rgba(42, 36, 31, .08);
      --shadow-soft: 0 6px 18px rgba(42, 36, 31, .05);
      --header-top: 46px;
      --header-bottom: 58px;
      --container: 1220px;
      --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
      --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --space-section: 104px;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--ivory);
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; line-height: 1.28; color: var(--ink); margin: 0; }
    p { margin: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; }
    ::selection { background: rgba(196, 162, 101, .28); color: var(--ink); }
    .skip-link {
      position: absolute; left: 16px; top: -48px; z-index: 80;
      background: var(--copper); color: var(--ink); padding: 8px 14px; border-radius: 6px;
    }
    .skip-link:focus { top: 12px; }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .site-header {
      position: sticky; top: 0; z-index: 50;
      background: var(--ivory);
      box-shadow: 0 8px 24px rgba(20, 17, 14, .06);
    }
    .header-top {
      height: var(--header-top);
      background: var(--graphite);
      color: var(--cream);
      display: flex; align-items: center;
    }
    .header-top .container {
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
    }
    .brand { display: flex; align-items: center; gap: 10px; min-height: 44px; color: var(--filament); }
    .brand-mark {
      width: 32px; height: 32px; flex: 0 0 32px; color: var(--copper);
    }
    .brand-name { font-family: var(--font-serif); font-size: 18px; letter-spacing: .04em; color: var(--filament); }
    .brand-tag { font-size: 13px; color: rgba(237, 228, 212, .72); padding-left: 10px; border-left: 1px solid rgba(196, 162, 101, .35); }
    .header-meta { display: flex; align-items: center; gap: 22px; font-size: 13px; color: rgba(237, 228, 212, .86); }
    .header-meta a { color: var(--filament); }
    .header-meta a:hover { color: #fff; }
    .header-bottom {
      height: var(--header-bottom);
      background: var(--ivory);
      border-bottom: 1px solid var(--line-soft);
      display: flex; align-items: center;
    }
    .header-bottom .container {
      display: flex; align-items: center; justify-content: space-between; gap: 18px;
    }
    .nav-desk { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
    .nav-desk a {
      position: relative;
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 44px; padding: 0 12px;
      font-size: 14px; color: var(--graphite);
    }
    .nav-desk a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 8px; height: 2px;
      background: var(--copper); transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
      box-shadow: 0 0 8px var(--glow-strong);
    }
    .nav-desk a:hover, .nav-desk a.is-active { color: var(--ink); }
    .nav-desk a:hover::after, .nav-desk a.is-active::after { transform: scaleX(1); }
    .menu-toggle {
      display: none; width: 44px; height: 44px; border-radius: 8px;
      border: 1px solid var(--line); color: var(--ink); align-items: center; justify-content: center;
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      display: block; width: 18px; height: 2px; background: currentColor; position: relative; border-radius: 2px;
    }
    .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 {
      display: none; position: absolute; left: 0; right: 0; top: 100%;
      background: var(--ink); color: var(--cream); padding: 18px 20px 28px;
      box-shadow: 0 18px 40px rgba(0,0,0,.28);
    }
    .drawer.is-open { display: block; }
    .drawer a {
      display: flex; align-items: center; min-height: 48px;
      border-bottom: 1px solid rgba(196,162,101,.16); font-size: 16px;
    }
    .drawer a:hover, .drawer a.is-active { color: var(--filament); }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 20px; border-radius: 8px;
      font-weight: 600; letter-spacing: .02em; transition: .22s ease;
    }
    .btn-primary {
      background: var(--copper); color: var(--ink);
      box-shadow: 0 8px 18px rgba(196,162,101,.28);
    }
    .btn-primary:hover, .btn-primary:active {
      background: var(--copper-bright); transform: translateY(-1px);
      box-shadow: 0 0 0 8px var(--glow), 0 10px 22px rgba(196,162,101,.32);
    }
    .btn-ghost {
      background: transparent; color: var(--filament);
      border: 1px solid var(--copper);
    }
    .btn-ghost:hover { background: rgba(196,162,101,.12); box-shadow: 0 0 0 8px var(--glow); transform: translateY(-1px); }
    .btn-on-dark.btn-ghost { color: var(--ivory); }
    .hero { position: relative; background: var(--ink); color: var(--ivory); isolation: isolate; }
    .slides { position: relative; min-height: 680px; overflow: hidden; }
    .slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .6s ease, visibility .6s;
    }
    .slide.is-on { opacity: 1; visibility: visible; z-index: 1; }
    .slide img { width: 100%; height: 100%; object-fit: cover; }
    .slide-mask {
      position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(20,17,14,.78) 0%, rgba(20,17,14,.42) 46%, rgba(20,17,14,.18) 100%),
        radial-gradient(80% 70% at 80% 20%, rgba(196,162,101,.22), transparent 55%);
    }
    .slide-copy {
      position: absolute; inset: 0; z-index: 2;
      display: flex; align-items: center;
    }
    .slide-copy .container { width: min(100% - 40px, var(--container)); }
    .kicker {
      display: inline-flex; align-items: center; gap: 8px;
      font-size: 13px; letter-spacing: .12em; color: var(--filament); margin-bottom: 16px;
    }
    .kicker::before { content: ""; width: 28px; height: 1px; background: var(--copper); }
    .hero h1, .hero .slide-title {
      font-family: var(--font-serif); font-size: 46px; line-height: 1.22; max-width: 16em; color: #FFF8EC; margin-bottom: 18px;
    }
    .hero-lead { max-width: 38em; font-size: 16px; line-height: 1.8; color: rgba(246,241,232,.88); margin-bottom: 28px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .carousel-ui {
      position: absolute; z-index: 3; left: 0; right: 0; bottom: 132px;
      display: flex; align-items: center; justify-content: space-between;
      width: min(100% - 40px, var(--container)); margin: 0 auto;
    }
    .dots { display: flex; gap: 8px; }
    .dot {
      width: 28px; height: 3px; border-radius: 2px; background: rgba(246,241,232,.28); min-height: 12px; padding: 8px 0;
      background-clip: content-box;
    }
    .dot.is-on { background: var(--copper); background-clip: content-box; box-shadow: 0 0 10px var(--glow-strong); }
    .arrow-group { display: flex; gap: 8px; }
    .arrow, .pause-btn {
      width: 44px; height: 44px; border-radius: 50%;
      border: 1px solid rgba(196,162,101,.5); color: var(--ivory);
      display: grid; place-items: center; background: rgba(20,17,14,.35);
    }
    .arrow:hover, .pause-btn:hover { background: rgba(196,162,101,.22); }
    .preview-bar {
      position: relative; z-index: 4; margin-top: -88px;
    }
    .preview-card {
      display: grid; grid-template-columns: 160px 1fr auto auto; gap: 22px; align-items: center;
      background: #1B1713; border: 1px solid rgba(196,162,101,.28);
      border-radius: 12px; padding: 14px; color: var(--cream);
      box-shadow: 0 18px 40px rgba(0,0,0,.28);
    }
    .preview-card img { width: 160px; height: 96px; object-fit: cover; border-radius: 8px; }
    .preview-card h2 { color: var(--ivory); font-size: 22px; margin-bottom: 6px; }
    .preview-card p { color: rgba(237,228,212,.76); font-size: 14px; }
    .countdown { display: flex; gap: 8px; }
    .count-cell {
      min-width: 58px; text-align: center; background: rgba(246,241,232,.06);
      border: 1px solid rgba(196,162,101,.2); border-radius: 8px; padding: 8px 6px;
    }
    .count-cell b { display: block; font-family: var(--font-serif); font-size: 22px; color: var(--filament); }
    .count-cell span { font-size: 12px; color: var(--weak); }
    main section { scroll-margin-top: 124px; }
    .section { padding: var(--space-section) 0; position: relative; }
    .section-head { max-width: 760px; margin-bottom: 40px; }
    .section-head h2 { font-size: 30px; margin-bottom: 14px; }
    .section-head p { color: var(--muted); }
    .section-cream { background: var(--cream); }
    .section-ivory { background: var(--ivory); }
    .section-dark {
      background:
        radial-gradient(70% 80% at 12% 20%, rgba(196,162,101,.16), transparent 42%),
        radial-gradient(50% 60% at 90% 80%, rgba(224,196,138,.1), transparent 46%),
        var(--ink);
      color: var(--cream);
    }
    .section-dark h2, .section-dark h3 { color: var(--ivory); }
    .section-dark .section-head p { color: rgba(237,228,212,.76); }
    .diag-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
    .frame-photo { position: relative; border-radius: 12px; overflow: hidden; }
    .frame-photo img { width: 100%; height: 460px; object-fit: cover; }
    .frame-photo::after {
      content: ""; position: absolute; inset: auto 18px 18px auto; width: 88px; height: 88px;
      border-right: 1px solid var(--copper); border-bottom: 1px solid var(--copper); opacity: .8;
    }
    .issue-list { display: flex; flex-direction: column; gap: 14px; }
    .issue-item {
      display: grid; grid-template-columns: 72px 1fr; gap: 16px; align-items: start;
      padding: 18px 18px 18px 0; border-bottom: 1px solid rgba(42,36,31,.08);
    }
    .issue-no { font-family: var(--font-serif); color: var(--copper); font-size: 20px; }
    .issue-item h3 { font-size: 20px; margin-bottom: 6px; }
    .issue-item p { color: var(--muted); font-size: 15px; }
    .split { display: grid; grid-template-columns: .92fr 1.08fr; gap: 56px; align-items: center; }
    .split.reverse { grid-template-columns: 1.08fr .92fr; }
    .spec-table { width: 100%; border-collapse: collapse; margin-top: 22px; font-size: 14px; }
    .spec-table th, .spec-table td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); }
    .spec-table th { color: var(--weak); font-weight: 500; font-size: 13px; }
    .trust-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
    .badge {
      display: inline-flex; align-items: center; min-height: 36px; padding: 0 12px;
      border: 1px solid var(--line); border-radius: 999px; font-size: 13px; color: var(--graphite); background: rgba(255,250,243,.65);
    }
    .strength-grid {
      display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px;
    }
    .adv-card {
      grid-column: span 2;
      background: rgba(255,250,243,.55);
      border: 1px solid rgba(196,162,101,.28);
      border-radius: 8px; padding: 22px 20px; box-shadow: var(--shadow-soft);
      transition: .2s ease;
    }
    .adv-card:nth-child(1), .adv-card:nth-child(2) { grid-column: span 3; }
    .adv-card:hover { transform: translateY(-2px); border-color: var(--copper); }
    .adv-card .line-ico {
      width: 36px; height: 36px; margin-bottom: 14px; color: var(--copper);
    }
    .adv-card h3 { font-size: 20px; margin-bottom: 8px; }
    .adv-card p { color: var(--muted); font-size: 14px; }
    .steps {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
      border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
    }
    .step { padding: 28px 22px; position: relative; }
    .step:not(:last-child)::after {
      content: ""; position: absolute; top: 24px; right: 0; width: 1px; height: calc(100% - 48px); background: var(--line);
    }
    .step b { display: block; color: var(--copper); font-family: var(--font-serif); font-size: 13px; margin-bottom: 10px; letter-spacing: .08em; }
    .step h3 { font-size: 20px; margin-bottom: 8px; }
    .step p { color: var(--muted); font-size: 14px; }
    .step .result { margin-top: 12px; font-size: 13px; color: var(--graphite); }
    .product-stage {
      display: grid; grid-template-columns: 1.35fr .9fr; grid-template-rows: auto auto; gap: 18px;
    }
    .prod-card {
      background: #FFFaf3; border-radius: 10px; overflow: hidden;
      box-shadow: var(--shadow-warm); display: flex; flex-direction: column;
    }
    .prod-card.featured { grid-row: span 2; }
    .prod-card img { width: 100%; height: 220px; object-fit: cover; }
    .prod-card.featured img { height: 360px; }
    .prod-body { padding: 20px 20px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .prod-body h3 { font-size: 22px; }
    .prod-body p { color: var(--muted); font-size: 14px; }
    .params { display: flex; flex-wrap: wrap; gap: 8px; }
    .chip {
      font-size: 12px; color: var(--graphite); background: var(--cream);
      border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px;
    }
    .compare-wrap { overflow: auto; }
    .compare {
      width: 100%; min-width: 680px; border-collapse: collapse; background: #FFFaf3;
      border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
    }
    .compare th, .compare td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
    .compare thead th { background: var(--graphite); color: var(--ivory); font-family: var(--font-serif); font-size: 18px; font-weight: 600; }
    .compare thead th:nth-child(3) { background: var(--copper); color: var(--ink); }
    .compare tbody th { width: 18%; color: var(--weak); font-weight: 500; background: var(--cream); }
    .compare tbody td { font-size: 14px; color: var(--graphite); }
    .case-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: stretch; }
    .case-visual { position: relative; border-radius: 12px; overflow: hidden; min-height: 420px; border: 1px solid rgba(196,162,101,.28); }
    .case-visual img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
    .case-slices { display: flex; flex-direction: column; gap: 16px; }
    .case-slice {
      padding: 20px 22px; border: 1px solid rgba(196,162,101,.22); border-radius: 10px;
      background: rgba(255,250,243,.03);
    }
    .case-slice h3 { font-size: 20px; margin-bottom: 8px; }
    .case-slice p { color: rgba(237,228,212,.76); font-size: 14px; }
    .stats {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
    }
    .stat {
      padding: 8px 8px 8px 0; border-left: 1px solid var(--line); padding-left: 22px;
    }
    .stat b {
      display: block; font-family: var(--font-serif); font-size: 40px; color: var(--ink); line-height: 1.1;
    }
    .stat span { display: block; margin-top: 8px; color: var(--muted); font-size: 14px; }
    .story-grid { display: grid; grid-template-columns: 1.2fr .9fr .9fr; gap: 18px; }
    .story {
      background: #FFFaf3; border-radius: 10px; overflow: hidden; box-shadow: var(--shadow-warm);
      display: flex; flex-direction: column;
    }
    .story img { width: 100%; height: 210px; object-fit: cover; }
    .story-body { padding: 20px; }
    .space-tag {
      display: inline-block; font-size: 12px; color: var(--copper-deep); border: 1px solid var(--line);
      border-radius: 999px; padding: 3px 10px; margin-bottom: 10px;
    }
    .story h3 { font-size: 20px; margin-bottom: 8px; }
    .quote {
      margin-top: 12px; padding-left: 12px; border-left: 2px solid var(--copper);
      color: var(--muted); font-size: 14px;
    }
    .review-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .review {
      background: var(--ivory); border-radius: 10px; padding: 22px 20px; box-shadow: var(--shadow-soft);
      border-top: 2px solid var(--copper);
    }
    .stars { color: var(--copper); letter-spacing: 2px; margin-bottom: 10px; font-size: 14px; }
    .review p { font-size: 14px; color: var(--graphite); min-height: 5.2em; }
    .review-meta { margin-top: 16px; font-size: 13px; color: var(--weak); }
    .audience { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .aud-card {
      display: grid; grid-template-columns: 120px 1fr; gap: 18px; align-items: center;
      background: #FFFaf3; border-radius: 10px; padding: 18px; box-shadow: var(--shadow-soft);
    }
    .aud-card img { width: 120px; height: 120px; object-fit: cover; border-radius: 8px; }
    .aud-card h3 { font-size: 20px; margin-bottom: 6px; }
    .aud-card p { color: var(--muted); font-size: 14px; }
    .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
    .scene-list { display: flex; flex-direction: column; gap: 16px; }
    .scene-bar {
      display: grid; grid-template-columns: 280px 1fr auto; gap: 24px; align-items: center;
      min-height: 150px; background: #1B1713; color: var(--cream); border-radius: 12px; overflow: hidden;
      border: 1px solid rgba(196,162,101,.2);
    }
    .scene-bar img { width: 100%; height: 150px; object-fit: cover; }
    .scene-bar h3 { font-size: 22px; color: var(--ivory); margin-bottom: 6px; }
    .scene-bar p { font-size: 14px; color: rgba(237,228,212,.76); max-width: 46em; }
    .float-params {
      display: flex; flex-direction: column; gap: 8px; padding-right: 22px;
    }
    .float-params span {
      background: rgba(196,162,101,.14); border: 1px solid rgba(196,162,101,.3);
      color: var(--filament); font-size: 12px; border-radius: 999px; padding: 6px 12px; white-space: nowrap;
    }
    .news-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 18px; }
    .news-feature { background: #FFFaf3; border-radius: 10px; overflow: hidden; box-shadow: var(--shadow-warm); }
    .news-feature img { width: 100%; height: 240px; object-fit: cover; }
    .news-feature .pad, .news-row .pad { padding: 18px 20px 20px; }
    .news-feature h3, .news-row h3 { font-size: 20px; margin-bottom: 8px; }
    .news-list { display: flex; flex-direction: column; gap: 14px; }
    .news-row {
      display: grid; grid-template-columns: 148px 1fr; gap: 14px; background: #FFFaf3;
      border-radius: 10px; overflow: hidden; box-shadow: var(--shadow-soft);
    }
    .news-row img { width: 148px; height: 118px; object-fit: cover; }
    .news-row p, .news-feature p { color: var(--muted); font-size: 14px; }
    .optics {
      display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px;
    }
    .optic {
      background: rgba(255,250,243,.04); border: 1px solid rgba(196,162,101,.22);
      border-radius: 10px; padding: 20px 16px;
    }
    .optic h3 { font-size: 18px; margin-bottom: 8px; }
    .optic .val { font-family: var(--font-serif); color: var(--filament); font-size: 15px; margin-bottom: 8px; }
    .optic p { font-size: 13px; color: rgba(237,228,212,.72); }
    .faq-list { display: flex; flex-direction: column; gap: 10px; max-width: 920px; }
    .faq-item { border: 1px solid var(--line); border-radius: 10px; background: #FFFaf3; overflow: hidden; }
    .faq-item button {
      width: 100%; text-align: left; min-height: 56px; padding: 14px 52px 14px 20px;
      font-size: 16px; font-weight: 600; color: var(--ink); position: relative;
    }
    .faq-item button::after {
      content: ""; position: absolute; right: 20px; top: 50%; width: 10px; height: 10px;
      border-right: 1.5px solid var(--copper); border-bottom: 1.5px solid var(--copper);
      transform: translateY(-70%) rotate(45deg); transition: .2s ease;
    }
    .faq-item.is-open button::after { transform: translateY(-20%) rotate(225deg); }
    .faq-item .ans { display: none; padding: 0 20px 18px; color: var(--muted); font-size: 15px; }
    .faq-item.is-open .ans { display: block; }
    .promise-row {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
    }
    .promise {
      display: flex; gap: 12px; align-items: flex-start;
      padding: 8px 4px;
    }
    .promise i {
      flex: 0 0 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line);
      display: grid; place-items: center; color: var(--copper);
    }
    .promise h3 { font-size: 18px; margin-bottom: 4px; }
    .promise p { font-size: 13px; color: var(--muted); }
    .consult-grid { display: grid; grid-template-columns: 1fr .86fr; gap: 48px; align-items: start; }
    .form-card {
      background: #1B1713; border: 1px solid rgba(196,162,101,.28); border-radius: 12px; padding: 28px 26px;
    }
    .form-card h2 { margin-bottom: 10px; }
    .form-card .hint { color: rgba(237,228,212,.7); margin-bottom: 20px; font-size: 14px; }
    label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--filament); }
    .field { margin-bottom: 14px; }
    input, select, textarea {
      width: 100%; background: var(--ivory); color: var(--ink);
      border: 1px solid #3d352c; border-radius: 8px; min-height: 44px; padding: 10px 12px;
    }
    textarea { min-height: 110px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--copper); outline: 2px solid rgba(196,162,101,.25); }
    .error input, .error select, .error textarea { border-color: var(--ochre); }
    .err { display: none; color: #C9A08E; font-size: 12px; margin-top: 4px; }
    .error .err { display: block; }
    .form-ok {
      display: none; margin-top: 12px; padding: 12px 14px; border-radius: 8px;
      background: rgba(196,162,101,.12); color: var(--filament); font-size: 14px;
    }
    .aside-contact { display: flex; flex-direction: column; gap: 16px; }
    .aside-contact li {
      padding: 16px 0; border-bottom: 1px solid rgba(196,162,101,.18);
    }
    .aside-contact span { display: block; font-size: 13px; color: rgba(237,228,212,.6); }
    .aside-contact b { font-size: 20px; font-family: var(--font-serif); color: var(--ivory); }
    .site-footer {
      background: #100E0C; color: rgba(237,228,212,.78); padding: 64px 0 28px; font-size: 14px;
    }
    .foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1.1fr .9fr; gap: 32px; margin-bottom: 36px; }
    .site-footer h3 { color: var(--ivory); font-size: 18px; margin-bottom: 14px; }
    .site-footer a:hover { color: var(--filament); }
    .foot-nav { display: flex; flex-direction: column; gap: 8px; }
    .copy {
      border-top: 1px solid rgba(196,162,101,.16); padding-top: 18px; font-size: 13px; color: rgba(237,228,212,.5);
      display: flex; flex-wrap: wrap; gap: 10px 18px; justify-content: space-between;
    }
    @media (max-width: 1200px) {
      .hero h1, .hero .slide-title { font-size: 40px; }
      .preview-card { grid-template-columns: 140px 1fr; }
      .countdown, .preview-card .btn { grid-column: auto; }
      .optics { grid-template-columns: repeat(3, 1fr); }
      .review-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 992px) {
      :root { --space-section: 84px; }
      .header-meta .hours { display: none; }
      .diag-grid, .split, .split.reverse, .case-layout, .consult-grid, .story-grid, .news-grid, .audience { grid-template-columns: 1fr; }
      .product-stage { grid-template-columns: 1fr 1fr; }
      .prod-card.featured { grid-column: span 2; grid-row: auto; }
      .scene-bar { grid-template-columns: 200px 1fr; }
      .float-params { display: none; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .slides { min-height: 620px; }
    }
    @media (max-width: 768px) {
      .nav-desk { display: none; }
      .menu-toggle { display: inline-flex; }
      .brand-tag { display: none; }
      .header-meta .tel-text { display: none; }
      .hero h1, .hero .slide-title { font-size: 30px; }
      .slides { min-height: 560px; }
      .carousel-ui { bottom: 168px; }
      .preview-bar { margin-top: -64px; }
      .preview-card { grid-template-columns: 1fr; }
      .preview-card img { width: 100%; height: 140px; }
      .strength-grid, .steps, .stats, .promise-row, .optics { grid-template-columns: 1fr 1fr; }
      .adv-card, .adv-card:nth-child(1), .adv-card:nth-child(2) { grid-column: span 1; }
      .product-stage { grid-template-columns: 1fr; }
      .prod-card.featured { grid-column: auto; }
      .scene-bar { grid-template-columns: 1fr; }
      .scene-bar img { height: 180px; }
      .news-row { grid-template-columns: 110px 1fr; }
      .aud-card { grid-template-columns: 88px 1fr; }
      .aud-card img { width: 88px; height: 88px; }
    }
    @media (max-width: 520px) {
      :root { --space-section: 72px; }
      .container { width: min(100% - 28px, var(--container)); }
      .hero h1, .hero .slide-title { font-size: 28px; }
      .slides { min-height: 520px; }
      .section-head h2 { font-size: 26px; }
      .strength-grid, .steps, .stats, .promise-row, .optics, .review-grid, .foot-grid { grid-template-columns: 1fr; }
      .step:not(:last-child)::after { display: none; }
      .step { border-bottom: 1px solid var(--line); }
      .frame-photo img, .case-visual img { height: 240px; min-height: 240px; }
      .stat b { font-size: 32px; }
      .header-top .btn { padding: 0 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      .slide, .btn, .nav-desk a::after { transition: none; }
    }

/* roulang page: index */
:root{
  --copper:#C4A36A;
  --amber:#E0B15A;
  --bronze:#8A6A3B;
  --gypsum:#F6F1E8;
  --linen:#EFE6D6;
  --char:#161310;
  --ink:#2A241C;
  --muted:#6B6156;
  --paper:#F4EBD8;
  --line:rgba(138,106,59,.28);
  --line-strong:rgba(196,163,106,.55);
  --radius:12px;
  --radius-sm:8px;
  --pill:999px;
  --shadow:0 12px 32px rgba(42,36,28,.08);
  --shadow-lg:0 18px 40px rgba(42,36,28,.12);
  --space:104px;
  --container:1220px;
  --header-h:108px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;max-width:100%}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--gypsum);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,p{margin:0}
:focus-visible{outline:2px solid var(--bronze);outline-offset:3px}
.container{width:min(100% - 40px,var(--container));margin:0 auto}
.site-header{position:sticky;top:0;z-index:80;background:rgba(246,241,232,.92);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:background .25s,border-color .25s,box-shadow .25s}
.site-header.is-compact{background:var(--char);border-bottom:1px solid var(--line-strong);box-shadow:0 10px 24px rgba(22,19,16,.28);--header-h:64px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;padding:6px 0;font-size:13px;color:var(--muted);border-bottom:1px solid var(--line)}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.topbar a{color:var(--ink);min-height:32px;display:inline-flex;align-items:center}
.topbar a:hover{color:var(--bronze)}
.site-header.is-compact .topbar{display:none}
.cert{display:inline-flex;align-items:center;gap:6px;padding:2px 10px;border:1px solid var(--line-strong);border-radius:var(--pill);color:var(--bronze);background:rgba(196,163,106,.08);font-size:12px}
.mainbar{display:flex;align-items:center;gap:20px;min-height:72px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;min-height:44px}
.logo-mark{width:36px;height:36px;border:1px solid var(--copper);border-radius:50%;display:grid;place-items:center;color:var(--bronze);background:radial-gradient(circle at 50% 40%,rgba(224,177,90,.35),transparent 70%)}
.logo-text{font-family:var(--serif);font-size:22px;font-weight:700;letter-spacing:.04em;color:var(--ink)}
.logo-sub{display:block;font-family:var(--sans);font-size:11px;color:var(--muted);font-weight:400;letter-spacing:.18em}
.site-header.is-compact .logo-text,.site-header.is-compact .nav-links a{color:var(--paper)}
.site-header.is-compact .logo-sub{color:#b7aa96}
.site-header.is-compact .logo-mark{border-color:var(--copper);color:var(--amber)}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{position:relative;padding:10px 11px;min-height:44px;display:inline-flex;align-items:center;font-size:14px;color:var(--ink);white-space:nowrap}
.nav-links a::after{content:"";position:absolute;left:12px;right:12px;bottom:6px;height:2px;background:var(--copper);transform:scaleX(0);transform-origin:left;transition:transform .2s}
.nav-links a:hover,.nav-links a.is-active{color:var(--bronze)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-cta{margin-left:8px}
.menu-toggle,.drawer-close{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:8px;border:1px solid var(--line)}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{display:block;width:18px;height:2px;background:var(--ink);position:relative;border-radius:2px}
.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}
.site-header.is-compact .menu-toggle{border-color:rgba(244,235,216,.2)}
.site-header.is-compact .menu-toggle span,.site-header.is-compact .menu-toggle span::before,.site-header.is-compact .menu-toggle span::after{background:var(--paper)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 22px;border-radius:var(--pill);font-size:14px;font-weight:600;line-height:1.2;transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s}
.btn-primary{background:linear-gradient(180deg,#d4b57a,var(--copper));color:var(--char);box-shadow:0 8px 18px rgba(196,163,106,.28)}
.btn-primary:hover{box-shadow:0 0 12px rgba(224,177,90,.5),0 10px 22px rgba(196,163,106,.28);filter:brightness(1.06)}
.btn-primary:active{transform:translateY(1px) scale(.98)}
.btn-ghost{border:1px solid var(--copper);color:var(--paper);background:transparent}
.btn-ghost:hover{background:rgba(196,163,106,.12);box-shadow:0 0 10px rgba(224,177,90,.28)}
.btn-line{border:1px solid var(--bronze);color:var(--ink);background:transparent}
.btn-line:hover{border-color:var(--copper);box-shadow:0 0 10px rgba(196,163,106,.25)}
.btn-dark{background:var(--char);color:var(--paper)}
.btn-dark:hover{background:#221c16;box-shadow:0 0 12px rgba(224,177,90,.3)}
.badge{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:var(--pill);border:1px solid var(--line-strong);background:rgba(196,163,106,.1);color:var(--bronze);font-size:12px;font-weight:600}
main{display:block}
section[id]{scroll-margin-top:calc(var(--header-h) + 14px)}
.section{padding:var(--space) 0;position:relative}
.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--bronze);font-size:13px;letter-spacing:.12em;margin-bottom:10px}
.section-kicker::before{content:"";width:18px;height:1px;background:var(--copper)}
.section h2{font-family:var(--serif);font-size:34px;line-height:1.3;font-weight:700;margin-bottom:16px}
.lead{max-width:42em;color:var(--muted);font-size:16px}
.grid-paper{background-image:linear-gradient(rgba(196,163,106,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(196,163,106,.07) 1px,transparent 1px);background-size:36px 36px}
.hero{position:relative;min-height:min(92vh,820px);background:var(--char);color:var(--paper);overflow:hidden}
.hero-track{position:relative;min-height:min(92vh,820px)}
.hero-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .7s ease,visibility .7s}
.hero-slide.is-on{opacity:1;visibility:visible;z-index:1}
.hero-slide img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.05)}
.hero-dim{position:absolute;inset:0;background:radial-gradient(ellipse at 18% 28%,rgba(224,177,90,.22),transparent 36%),linear-gradient(90deg,rgba(22,19,16,.82) 0%,rgba(22,19,16,.46) 46%,rgba(22,19,16,.28) 100%),linear-gradient(to top,rgba(22,19,16,.72),transparent 42%)}
.hero-beam{position:absolute;left:18%;top:-10%;width:240px;height:140%;background:linear-gradient(180deg,rgba(224,177,90,.16),rgba(224,177,90,.02) 70%);clip-path:polygon(38% 0,62% 0,88% 100%,12% 100%);pointer-events:none;mix-blend-mode:screen}
.hero-copy{position:absolute;z-index:2;left:0;right:0;top:0;bottom:118px;display:flex;align-items:center}
.hero-copy .container{width:min(100% - 40px,var(--container))}
.brand-lock{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px;padding:6px 12px 6px 6px;border:1px solid rgba(196,163,106,.4);border-radius:var(--pill);background:rgba(22,19,16,.35)}
.brand-lock b{font-family:var(--serif);font-size:15px;font-weight:700;color:var(--amber)}
.hero h1,.hero-slide-title{font-family:var(--serif);font-size:48px;line-height:1.22;max-width:16em;font-weight:700;margin:0 0 18px}
.hero-intro{max-width:40em;font-size:16px;color:#e8dcc4;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-nav{position:absolute;z-index:3;top:46%;left:0;right:0;display:flex;justify-content:space-between;padding:0 12px;pointer-events:none}
.hero-nav button{pointer-events:auto;width:48px;height:48px;border-radius:50%;border:1px solid rgba(196,163,106,.45);background:rgba(22,19,16,.4);color:var(--paper);font-size:20px}
.hero-nav button:hover{background:rgba(196,163,106,.25);box-shadow:0 0 12px rgba(224,177,90,.35)}
.hero-dots{position:absolute;z-index:3;left:50%;bottom:132px;transform:translateX(-50%);display:flex;gap:8px}
.hero-dots button{width:10px;height:10px;border-radius:50%;background:rgba(244,235,216,.35);min-width:10px;min-height:10px;padding:0}
.hero-dots button.is-on{background:var(--copper);box-shadow:0 0 10px rgba(224,177,90,.7);width:22px;border-radius:var(--pill)}
.hero-pause{position:absolute;z-index:3;right:24px;bottom:132px;width:44px;height:44px;border-radius:50%;border:1px solid rgba(196,163,106,.45);color:var(--paper);background:rgba(22,19,16,.4)}
.demo-bar{position:absolute;z-index:4;left:0;right:0;bottom:0;background:linear-gradient(90deg,rgba(22,19,16,.94),rgba(42,32,20,.9));border-top:1px solid rgba(196,163,106,.35)}
.demo-inner{display:grid;grid-template-columns:1.4fr auto auto;gap:20px;align-items:center;padding:14px 0}
.demo-bar h3{font-family:var(--serif);font-size:18px;margin:0 0 4px;color:var(--paper)}
.demo-bar p{font-size:13px;color:#cbbca3;margin:0}
.count{display:flex;gap:8px}
.count div{min-width:58px;padding:8px 6px;text-align:center;border:1px solid rgba(196,163,106,.35);border-radius:10px;background:rgba(246,241,232,.06)}
.count span{display:block;font-family:var(--serif);font-size:22px;color:var(--amber);line-height:1.1}
.count em{font-style:normal;font-size:11px;color:#cbbca3}
.pain-layout{display:grid;grid-template-columns:1fr 1.05fr;gap:36px;align-items:stretch;margin-top:36px}
.pain-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pain-card{padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:#fffdf8;box-shadow:var(--shadow);min-height:170px;transition:border-color .2s,transform .2s,box-shadow .2s}
.pain-card:hover{border-color:var(--copper);transform:translateY(-3px);box-shadow:0 0 0 1px rgba(196,163,106,.2),var(--shadow-lg)}
.pain-card h3{font-size:18px;margin:10px 0 8px;font-family:var(--serif)}
.pain-card p{font-size:15px;color:var(--muted)}
.pain-no{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--copper);color:var(--bronze);font-size:13px}
.pain-visual{position:relative;border-radius:14px;overflow:hidden;min-height:420px;box-shadow:var(--shadow-lg)}
.pain-visual img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.pain-visual figcaption{position:absolute;left:16px;right:16px;bottom:16px;padding:12px 14px;background:rgba(22,19,16,.72);color:var(--paper);border-radius:10px;font-size:14px}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.split-media{position:relative;border-radius:14px;overflow:hidden;min-height:460px;box-shadow:var(--shadow-lg)}
.split-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.param-pills{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 24px}
.ability-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px}
.ability-card{padding:26px 24px;border-radius:var(--radius);background:linear-gradient(180deg,#fffdf8,var(--linen));border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .2s,border-color .2s}
.ability-card:hover{transform:translateY(-4px);border-color:var(--copper)}
.ability-ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(196,163,106,.14);color:var(--bronze);margin-bottom:14px}
.ability-card h3{font-size:20px;font-family:var(--serif);margin-bottom:8px}
.ability-card p{font-size:15px;color:var(--muted)}
.timeline{margin-top:40px;display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative}
.timeline::before{content:"";position:absolute;left:8%;right:8%;top:27px;height:1px;background:linear-gradient(90deg,transparent,var(--copper),transparent)}
.step{padding:0 10px;text-align:center;position:relative}
.step-num{width:54px;height:54px;margin:0 auto 14px;border-radius:50%;display:grid;place-items:center;background:var(--char);color:var(--amber);font-family:var(--serif);font-size:18px;border:1px solid var(--copper);position:relative;z-index:1}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}
.step a{display:inline-flex;margin-top:10px;color:var(--bronze);font-size:13px;min-height:44px;align-items:center}
.step a:hover{color:var(--ink)}
.product-stage{margin-top:36px;display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:repeat(2,minmax(230px,1fr));gap:16px}
.product-card{position:relative;overflow:hidden;border-radius:14px;min-height:230px;color:var(--paper);box-shadow:var(--shadow);border:1px solid transparent;transition:border-color .2s,transform .2s}
.product-card:hover{border-color:var(--copper);transform:translateY(-3px)}
.product-card--lg{grid-row:1/3;min-height:480px}
.product-card img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.product-card .shade{position:absolute;inset:0;background:linear-gradient(to top,rgba(22,19,16,.86),rgba(22,19,16,.1) 55%)}
.product-body{position:absolute;left:0;right:0;bottom:0;padding:24px}
.product-body h3{font-family:var(--serif);font-size:26px;margin-bottom:6px}
.product-body .meta{font-size:14px;color:#e4d6bb;margin-bottom:10px}
.product-body ul{margin:0 0 14px;font-size:14px;color:#dccdb3}
.product-body li{padding-left:12px;position:relative;margin:3px 0}
.product-body li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--copper);position:absolute;left:0;top:.55em}
.case-dark{background:var(--char);color:var(--paper);padding:var(--space) 0;position:relative;overflow:hidden}
.case-dark .lead{color:#cbbca3}
.case-stage{margin-top:32px;display:grid;grid-template-columns:1.4fr 1fr;gap:14px}
.case-main,.case-side article{position:relative;overflow:hidden;border-radius:14px;min-height:240px}
.case-main{min-height:520px}
.case-side{display:grid;gap:14px}
.case-main img,.case-side img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.case-cap{position:absolute;left:0;right:0;bottom:0;padding:22px;background:linear-gradient(to top,rgba(22,19,16,.86),transparent)}
.case-cap h3{font-family:var(--serif);font-size:22px;margin-bottom:6px;color:var(--amber)}
.case-cap p{font-size:14px;color:#e8dcc4}
.stats{padding:56px 0;background:var(--linen);border-block:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{text-align:center;padding:18px 10px;border:1px solid var(--line-strong);border-radius:14px;background:rgba(246,241,232,.7)}
.stat b{display:block;font-family:var(--serif);font-size:40px;color:var(--bronze);line-height:1.1}
.stat span{display:block;margin-top:8px;color:var(--muted);font-size:14px}
.story-mag{margin-top:36px;display:grid;grid-template-columns:1.3fr .85fr;gap:16px}
.story-big,.story-small{border-radius:14px;overflow:hidden;background:#fffdf8;border:1px solid var(--line);box-shadow:var(--shadow)}
.story-big img{width:100%;height:340px;object-fit:cover}
.story-small img{width:100%;height:150px;object-fit:cover}
.story-copy{padding:22px}
.story-copy h3{font-family:var(--serif);font-size:22px;margin-bottom:8px}
.story-copy p{color:var(--muted);font-size:15px}
.story-tag{font-size:12px;color:var(--bronze);letter-spacing:.08em;margin-bottom:6px}
.story-col{display:grid;gap:16px}
.review-wrap{margin-top:32px;overflow:hidden}
.review-track{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding:8px 2px 18px;scrollbar-width:thin}
.review-card{flex:0 0 min(78%,420px);scroll-snap-align:start;padding:26px;border-radius:14px;background:#fffdf8;border:1px solid var(--line);box-shadow:var(--shadow);min-height:220px}
.review-card:nth-child(even){margin-top:22px}
.quote{font-family:var(--serif);font-size:42px;line-height:1;color:var(--copper);margin-bottom:6px}
.review-card p{font-size:15px;color:var(--ink);min-height:4.5em}
.review-who{margin-top:16px;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px}
.stars{color:var(--copper);letter-spacing:2px}
.space-layout{margin-top:32px;display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center}
.space-visual{position:relative;min-height:420px;border-radius:14px;overflow:hidden}
.space-visual img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.crowd{display:grid;gap:12px}
.crowd article{padding:16px 18px;border-left:3px solid var(--copper);background:#fffdf8;border-radius:0 12px 12px 0;box-shadow:var(--shadow)}
.crowd h3{font-size:18px;font-family:var(--serif);margin-bottom:4px}
.crowd p{font-size:14px;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.topic-row{margin-top:32px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic-card{position:relative;min-height:320px;border-radius:14px;overflow:hidden;color:var(--paper);display:flex;align-items:flex-end}
.topic-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.topic-card .shade{position:absolute;inset:0;background:linear-gradient(to top,rgba(22,19,16,.88),rgba(22,19,16,.15))}
.topic-card .txt{position:relative;z-index:1;padding:24px}
.topic-card h3{font-family:var(--serif);font-size:26px;margin-bottom:8px}
.topic-card p{font-size:14px;color:#e8dcc4;margin-bottom:14px}
.compare{overflow:auto;margin-top:28px;border:1px solid var(--line);border-radius:14px;background:#fffdf8;box-shadow:var(--shadow)}
.compare table{width:100%;border-collapse:collapse;min-width:720px}
.compare th,.compare td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
.compare th{font-family:var(--serif);font-size:16px;background:var(--linen);color:var(--ink)}
.compare td:first-child,.compare th:first-child{color:var(--bronze);font-weight:600;white-space:nowrap}
.news-grid{margin-top:32px;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.news-card{display:grid;grid-template-columns:160px 1fr;gap:0;background:#fffdf8;border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);min-height:160px}
.news-card img{width:100%;height:100%;object-fit:cover;min-height:160px}
.news-body{padding:18px 18px 18px 20px;border-left:3px solid var(--copper)}
.news-body time{font-size:12px;color:var(--bronze)}
.news-body h3{font-size:18px;font-family:var(--serif);margin:6px 0}
.news-body p{font-size:14px;color:var(--muted)}
.metric-wall{margin-top:32px;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.metric{display:flex;gap:16px;padding:20px;border-radius:14px;border:1px solid var(--line);background:linear-gradient(90deg,rgba(196,163,106,.08),#fffdf8 40%);box-shadow:var(--shadow)}
.metric b{font-family:var(--serif);font-size:28px;color:var(--bronze);min-width:3.4em;display:block}
.metric p{margin:0;color:var(--muted);font-size:14px}
.install-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.install-media{border-radius:14px;overflow:hidden;min-height:380px;position:relative;box-shadow:var(--shadow-lg)}
.install-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.checklist li{position:relative;padding:10px 0 10px 28px;border-bottom:1px solid var(--line);color:var(--muted)}
.checklist li::before{content:"";width:10px;height:10px;border:1px solid var(--copper);border-radius:50%;position:absolute;left:0;top:16px;box-shadow:0 0 0 4px rgba(196,163,106,.12)}
.faq-list{margin-top:28px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item button{width:100%;text-align:left;min-height:58px;padding:16px 44px 16px 0;font-size:17px;font-weight:600;position:relative;color:var(--ink)}
.faq-item button::after{content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;border-right:1.5px solid var(--bronze);border-bottom:1.5px solid var(--bronze);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
.faq-item.is-open button::after{transform:translateY(-20%) rotate(225deg)}
.faq-panel{display:none;padding:0 8px 18px 0;color:var(--muted);font-size:15px}
.faq-item.is-open .faq-panel{display:block}
.cta-band{padding:var(--space) 0;background:radial-gradient(ellipse at 20% 0%,rgba(224,177,90,.2),transparent 46%),var(--char);color:var(--paper)}
.cta-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:center}
.cta-band .lead{color:#cbbca3}
.form-card{background:var(--linen);color:var(--ink);padding:28px;border-radius:14px;box-shadow:var(--shadow-lg)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;min-height:44px;border:1px solid rgba(138,106,59,.28);border-radius:8px;padding:10px 12px;background:#fbf6ec;color:var(--ink)}
.field textarea{min-height:96px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--copper);box-shadow:0 0 0 3px rgba(196,163,106,.2)}
.form-note{font-size:13px;color:var(--muted);margin-top:8px}
.form-ok{display:none;padding:14px 16px;border-radius:10px;background:rgba(196,163,106,.16);color:var(--bronze);margin-bottom:12px}
.form-ok.is-show{display:block}
.site-footer{background:#110e0c;color:#d8ccb8;padding:64px 0 24px;border-top:1px solid rgba(196,163,106,.35)}
.foot-grid{display:grid;grid-template-columns:1.3fr .9fr 1.1fr .9fr;gap:28px;margin-bottom:36px}
.foot-brand .logo-text{color:var(--paper)}
.foot-brand p{margin-top:12px;font-size:14px;color:#b7aa96;max-width:28em}
.site-footer h3{font-family:var(--serif);color:var(--paper);font-size:16px;margin-bottom:12px}
.site-footer a{display:inline-flex;min-height:36px;align-items:center;color:#d8ccb8}
.site-footer a:hover{color:var(--amber)}
.foot-copy{border-top:1px solid rgba(196,163,106,.18);padding-top:16px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:#9c9080}
.glow-spot{position:absolute;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(224,177,90,.16),transparent 68%);pointer-events:none}
.alt-bg{background:#fbf6ec}
@media (max-width:1280px){
  .hero h1,.hero-slide-title{font-size:42px}
  .nav-links a{padding:10px 8px;font-size:13px}
}
@media (max-width:1024px){
  :root{--space:88px;--header-h:96px}
  .menu-toggle,.drawer-close{display:inline-flex}
  .site-nav{position:fixed;inset:0;background:rgba(22,19,16,.97);flex-direction:column;justify-content:center;align-items:stretch;padding:72px 28px 32px;transform:translateX(110%);transition:transform .28s ease;margin:0}
  .site-nav.is-open{transform:none}
  .nav-links{flex-direction:column;align-items:stretch;gap:4px}
  .nav-links a{color:var(--paper);font-size:20px;min-height:48px;border-bottom:1px solid rgba(196,163,106,.15)}
  .nav-links a::after{display:none}
  .nav-cta{margin:18px 0 0}
  .drawer-close{position:absolute;top:18px;right:18px;border-color:rgba(244,235,216,.25);color:var(--paper)}
  .split,.pain-layout,.story-mag,.space-layout,.cta-grid,.install-grid{grid-template-columns:1fr}
  .ability-grid,.stats-grid,.topic-row,.foot-grid{grid-template-columns:1fr 1fr}
  .timeline{grid-template-columns:1fr 1fr 1fr}
  .timeline::before{display:none}
  .product-stage{grid-template-columns:1fr;grid-template-rows:none}
  .product-card--lg{grid-row:auto;min-height:420px}
  .case-stage{grid-template-columns:1fr}
  .case-main{min-height:360px}
  .news-grid,.metric-wall,.form-row{grid-template-columns:1fr}
  .hero h1,.hero-slide-title{font-size:34px}
  .demo-inner{grid-template-columns:1fr;gap:12px}
  .hero-dots,.hero-pause{bottom:auto;top:18px}
  .hero-pause{right:16px}
  .hero-dots{left:16px;transform:none}
  .hero-copy{bottom:210px}
}
@media (max-width:768px){
  :root{--space:72px}
  .container{width:min(100% - 28px,var(--container))}
  .topbar{font-size:12px}
  .cert:nth-child(n+3){display:none}
  .section h2{font-size:28px}
  .ability-grid,.stats-grid,.topic-row,.foot-grid,.pain-grid,.timeline{grid-template-columns:1fr}
  .news-card{grid-template-columns:1fr}
  .news-card img{height:180px;min-height:0}
  .hero{min-height:auto}
  .hero-track{min-height:78vh}
  .hero h1,.hero-slide-title{font-size:30px}
  .review-card{flex-basis:86%}
  .review-card:nth-child(even){margin-top:0}
  .stat b{font-size:32px}
  .split-media,.pain-visual,.install-media{min-height:280px}
}
@media (max-width:520px){
  .hero-intro{font-size:15px}
  .hero-actions .btn{width:100%}
  .count div{min-width:52px}
  .mainbar{min-height:64px}
  .logo-text{font-size:18px}
}
@media (max-width:375px){
  .container{width:min(100% - 24px,var(--container))}
  .hero h1,.hero-slide-title{font-size:28px}
  .section h2{font-size:26px}
  body{font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none !important}
}