/* roulang page: index */
:root {
      --bg: #F4F1EA;
      --bg-alt: #E7E2D8;
      --ink: #1C1E19;
      --ink-soft: #4A4E45;
      --brand: #C45A22;
      --brand-deep: #A34716;
      --brand-2: #1E7A64;
      --steel: #2C312B;
      --steel-deep: #141613;
      --line: #C9C3B6;
      --card: #FFFdf8;
      --white: #FFFdf8;
      --shadow: 0 6px 14px rgba(28, 30, 25, .06);
      --radius-card: 8px;
      --radius-btn: 4px;
      --container: 1240px;
      --nav-h: 108px;
      --space-s: 88px;
      --space-m: 120px;
      --space-l: 160px;
      --ease: .22s ease;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }
    body {
      margin: 0;
      font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--ink);
      background: var(--bg);
      line-height: 1.75;
      font-size: 16px;
      letter-spacing: .01em;
    }
    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 { line-height: 1.28; letter-spacing: -.02em; font-weight: 700; margin: 0 0 .6em; color: var(--ink); }
    h1 { font-size: clamp(28px, 4vw, 46px); }
    h2 { font-size: clamp(22px, 2.6vw, 32px); }
    h3 { font-size: 18px; font-weight: 650; }
    p { margin: 0 0 1em; color: var(--ink-soft); }
    p:last-child { margin-bottom: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
    ::selection { background: var(--brand); color: #fff; }
    .skip {
      position: absolute; left: -999px; top: 0;
    }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .num { font-variant-numeric: tabular-nums; font-weight: 700; letter-spacing: -.03em; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      font-size: 12px; font-weight: 700; letter-spacing: .12em;
      text-transform: uppercase; color: var(--brand); margin-bottom: 12px;
    }
    .eyebrow::before {
      content: ""; width: 16px; height: 2px; background: var(--brand);
    }
    .lead { max-width: 42em; font-size: 16px; line-height: 1.75; }
    .muted { color: var(--ink-soft); }
    .site-header {
      position: sticky; top: 0; z-index: 80;
      background: rgba(244, 241, 234, .88);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid transparent;
    }
    .site-header.is-stuck { border-bottom-color: var(--line); }
    .util-bar {
      background: var(--bg-alt);
      color: var(--ink-soft);
      font-size: 12.5px;
      border-bottom: 1px solid var(--line);
    }
    .util-bar .container {
      display: flex; justify-content: space-between; align-items: center;
      min-height: 36px; gap: 16px;
    }
    .util-left, .util-right { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
    .util-bar a { color: var(--ink-soft); }
    .util-bar a:hover { color: var(--brand); }
    .dot-sep::before { content: "·"; margin-right: 18px; color: var(--line); }
    .main-nav .container {
      display: grid; grid-template-columns: auto 1fr auto; align-items: center;
      min-height: 72px; gap: 20px;
    }
    .logo {
      display: flex; align-items: center; gap: 10px; color: var(--ink);
    }
    .logo-mark {
      width: 36px; height: 36px; flex: none; color: var(--brand);
    }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-size: 18px; font-weight: 700; letter-spacing: -.02em; }
    .logo-text span { font-size: 11px; color: var(--ink-soft); font-weight: 500; letter-spacing: .08em; }
    .nav-links { display: flex; justify-content: center; gap: 6px; }
    .nav-links a {
      position: relative; padding: 10px 12px; font-size: 14px; font-weight: 500; color: var(--ink);
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 6px; height: 2px;
      background: var(--brand); transform: scaleX(0); transform-origin: left; transition: transform var(--ease);
    }
    .nav-links a::before {
      content: ""; position: absolute; left: 0; top: 50%; width: 3px; height: 10px; margin-top: -5px;
      background: var(--brand-2); opacity: 0; border-radius: 1px;
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--ink); }
    .nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
    .nav-links a.is-active::before { opacity: 1; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 18px; border-radius: var(--radius-btn);
      font-weight: 600; font-size: 14px; transition: background var(--ease), color var(--ease), border-color var(--ease), transform .12s ease;
      border: 1px solid transparent;
    }
    .btn:active { transform: translateY(1px); }
    .btn-solid { background: var(--brand); color: #fff; }
    .btn-solid:hover { background: var(--brand-deep); }
    .btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
    .btn-ghost:hover { background: var(--ink); color: var(--bg); }
    .btn-ghost.light { color: #fff; border-color: rgba(255,255,255,.55); }
    .btn-ghost.light:hover { background: #fff; color: var(--ink); }
    .btn-text { color: var(--brand-2); padding: 0; min-height: 0; font-weight: 600; }
    .btn-text:hover { color: var(--brand); }
    .menu-toggle {
      display: none; width: 44px; height: 44px; align-items: center; justify-content: center;
      border: 1px solid var(--line); border-radius: var(--radius-btn); background: var(--card);
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      display: block; width: 18px; height: 2px; background: var(--ink); 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 {
      position: fixed; inset: 0; background: var(--steel); color: #fff; z-index: 90;
      transform: translateX(100%); transition: transform .28s ease; display: flex; flex-direction: column;
      padding: 24px 24px 32px;
    }
    .drawer.is-open { transform: none; }
    .drawer-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
    .drawer a { color: #fff; }
    .drawer-links a {
      display: flex; align-items: center; min-height: 52px; font-size: 22px; font-weight: 600;
      border-bottom: 1px solid rgba(255,255,255,.08);
    }
    .drawer-foot { margin-top: auto; display: grid; gap: 10px; font-size: 14px; color: rgba(255,255,255,.78); }
    .drawer-close {
      width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.2); color: #fff; border-radius: 4px;
    }
    main { overflow: clip; }
    .section { padding: var(--space-s) 0; position: relative; }
    .section-alt { background: var(--bg-alt); }
    .section-head { margin-bottom: 36px; max-width: 42em; }
    .section-head h2 { margin-bottom: 12px; }
    .hero {
      position: relative; min-height: min(88vh, 760px); background: var(--steel-deep); color: #fff; overflow: hidden;
    }
    .hero-slider { position: relative; min-height: min(88vh, 760px); }
    .hero-slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .6s ease, visibility .6s;
    }
    .hero-slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
    .hero-slide img {
      width: 100%; height: 100%; object-fit: cover; filter: saturate(.92) contrast(1.02);
    }
    .hero-slide::after {
      content: ""; position: absolute; inset: 0;
      background:
        radial-gradient(ellipse at 18% 18%, rgba(255, 247, 230, .34), transparent 42%),
        linear-gradient(105deg, rgba(244,241,234,.62) 0%, rgba(20,22,19,.42) 36%, rgba(20,22,19,.78) 100%);
    }
    .hero-copy {
      position: relative; z-index: 2; width: min(100% - 40px, var(--container)); margin: 0 auto;
      padding: 72px 0 96px; max-width: 760px; color: var(--ink);
    }
    .hero-slide.is-active .hero-copy { color: var(--ink); }
    .hero-copy .kicker { color: var(--brand-deep); font-size: 13px; font-weight: 700; letter-spacing: .16em; margin-bottom: 14px; }
    .hero-copy h1, .hero-copy .slide-title {
      color: var(--ink); font-size: clamp(28px, 4.2vw, 48px); margin: 0 0 12px; text-shadow: 0 1px 0 rgba(255,253,248,.35);
    }
    .hero-copy .sub {
      font-size: 18px; color: var(--ink); font-weight: 600; margin-bottom: 16px;
    }
    .hero-copy .intro { color: var(--ink-soft); max-width: 40em; margin-bottom: 22px; }
    .chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
    .chip {
      display: inline-flex; align-items: center; gap: 8px; min-height: 36px; padding: 0 12px;
      background: rgba(255,253,248,.78); border: 1px solid var(--line); border-radius: 4px; font-size: 13px; font-weight: 600;
    }
    .chip i { width: 7px; height: 7px; background: var(--brand-2); display: block; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
    .verify { font-size: 13px; color: var(--ink-soft); }
    .hero-controls {
      position: absolute; z-index: 3; left: 0; right: 0; bottom: 22px;
      width: min(100% - 40px, var(--container)); margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between; gap: 12px;
    }
    .hero-arrows { display: flex; gap: 8px; }
    .icon-btn {
      width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.4); color: #fff; border-radius: 4px;
      background: rgba(20,22,19,.35); display: grid; place-items: center;
    }
    .icon-btn:hover { background: var(--brand); border-color: var(--brand); }
    .hero-dots { display: flex; gap: 8px; }
    .hero-dots button {
      width: 44px; height: 44px; display: grid; place-items: center;
    }
    .hero-dots button i {
      width: 10px; height: 10px; border: 1px solid #fff; display: block; background: transparent;
    }
    .hero-dots button.is-active i { background: var(--brand); border-color: var(--brand); }
    .split {
      display: grid; grid-template-columns: .92fr 1.08fr; gap: 48px; align-items: center;
    }
    .split.reverse { grid-template-columns: 1.08fr .92fr; }
    .media {
      position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--card);
    }
    .media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; transition: transform .5s ease; }
    .media:hover img { transform: scale(1.03); }
    .pain-list { display: grid; gap: 14px; }
    .pain-item {
      display: grid; grid-template-columns: 76px 1fr; gap: 14px; padding: 16px;
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); border-left: 3px solid transparent;
      transition: border-color var(--ease), box-shadow var(--ease);
    }
    .pain-item:hover { border-left-color: var(--brand); box-shadow: var(--shadow); }
    .pain-item .tag {
      font-size: 12px; font-weight: 700; color: var(--brand); letter-spacing: .08em; align-self: start; padding-top: 4px;
    }
    .pain-item h3 { margin-bottom: 6px; }
    .pain-item p { font-size: 14.5px; }
    .param-bar {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line);
      border: 1px solid var(--line); margin-top: 24px;
    }
    .param-bar div { background: var(--card); padding: 14px 12px; }
    .param-bar strong { display: block; font-size: 14px; color: var(--ink); }
    .param-bar span { font-size: 12px; color: var(--ink-soft); }
    .protocol { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .badge {
      display: inline-flex; align-items: center; min-height: 28px; padding: 0 8px;
      border: 1px solid var(--line); background: var(--bg); font-size: 12px; font-weight: 700; letter-spacing: .06em; border-radius: 2px;
    }
    .track {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative;
    }
    .track::before {
      content: ""; position: absolute; left: 4%; right: 4%; top: 28px; height: 1px; background: var(--line);
    }
    .track-step { padding: 0 16px 0 0; position: relative; }
    .track-step .idx {
      width: 56px; height: 56px; border: 1px solid var(--line); background: var(--card); display: grid; place-items: center;
      font-size: 12px; font-weight: 700; margin-bottom: 16px; position: relative; z-index: 1;
    }
    .track-step p { font-size: 14.5px; }
    .adv-grid {
      display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
    }
    .adv-card {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 22px 20px 20px;
      border-left: 3px solid transparent; transition: border-color var(--ease), box-shadow var(--ease);
    }
    .adv-card:hover { border-left-color: var(--brand); box-shadow: var(--shadow); }
    .adv-card .lamp { width: 8px; height: 8px; background: var(--line); margin-bottom: 14px; }
    .adv-card:hover .lamp { background: var(--brand-2); }
    .adv-card .metric { font-size: 13px; color: var(--brand); font-weight: 700; margin-top: 10px; }
    .work-axis { display: grid; gap: 22px; position: relative; }
    .work-axis::before {
      content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: var(--line);
    }
    .work-step {
      width: min(46%, 520px); background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 22px;
      border-top: 3px solid transparent;
    }
    .work-step:hover { border-top-color: var(--brand); }
    .work-step:nth-child(odd) { margin-right: auto; }
    .work-step:nth-child(even) { margin-left: auto; }
    .work-step .badge { margin-bottom: 10px; background: var(--ink); color: #fff; border-color: var(--ink); }
    .module-grid {
      display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 16px;
    }
    .mod-card {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); overflow: hidden;
      display: flex; flex-direction: column; border-top: 3px solid transparent; transition: border-color var(--ease);
    }
    .mod-card:hover { border-top-color: var(--brand); }
    .mod-card .cover { overflow: hidden; }
    .mod-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform .5s ease; }
    .mod-card:hover img { transform: scale(1.03); }
    .mod-card .body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .mod-card li { position: relative; padding-left: 14px; font-size: 14.5px; color: var(--ink-soft); margin-bottom: 6px; }
    .mod-card li::before { content: ""; width: 6px; height: 6px; background: var(--brand); position: absolute; left: 0; top: .55em; }
    .dark-band {
      background: var(--steel-deep); color: #fff; padding: var(--space-m) 0; position: relative; overflow: hidden;
    }
    .dark-band::before {
      content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .06;
      background-image:
        linear-gradient(#fff 1px, transparent 1px),
        linear-gradient(90deg, #fff 1px, transparent 1px);
      background-size: 48px 48px;
    }
    .dark-band .container { position: relative; display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .dark-band h2, .dark-band p, .dark-band h3 { color: #fff; }
    .dark-band p { color: rgba(255,255,255,.78); }
    .case-slices { display: grid; gap: 12px; }
    .case-slice {
      border: 1px solid rgba(255,255,255,.12); padding: 18px; display: grid; grid-template-columns: 120px 1fr auto; gap: 12px; align-items: center;
    }
    .case-slice .ind { color: var(--brand); font-size: 12px; font-weight: 700; letter-spacing: .08em; }
    .case-slice .result { color: var(--brand-2); font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
    .story-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 16px; }
    .story-main {
      display: grid; grid-template-columns: 1.1fr .9fr; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); overflow: hidden;
    }
    .story-main img { width: 100%; height: 100%; object-fit: cover; min-height: 280px; }
    .story-main blockquote { margin: 0; padding: 28px; font-size: 17px; color: var(--ink); }
    .story-main cite { display: block; margin-top: 16px; font-style: normal; font-size: 13px; color: var(--ink-soft); }
    .story-side { display: grid; gap: 16px; }
    .story-mini {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 18px;
      display: grid; grid-template-columns: 72px 1fr; gap: 12px; border-left: 3px solid transparent;
    }
    .story-mini:hover { border-left-color: var(--brand); }
    .story-mini img { width: 72px; height: 72px; object-fit: cover; }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .metric-card {
      background: var(--card); border: 1px solid var(--line); padding: 22px 18px; border-radius: var(--radius-card);
    }
    .metric-card .num { font-size: 36px; color: var(--brand); display: block; line-height: 1.1; }
    .metric-card .unit { font-size: 14px; font-weight: 600; color: var(--ink); }
    .metric-card p { font-size: 13px; margin-top: 10px; }
    .quotes { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .quote-card {
      background: var(--card); border: 1px solid var(--line); padding: 22px; border-radius: var(--radius-card);
    }
    .quote-card p { color: var(--ink); }
    .quote-meta { margin-top: 14px; font-size: 13px; color: var(--ink-soft); display: flex; justify-content: space-between; gap: 8px; }
    .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
    .tag-pill {
      min-height: 36px; padding: 0 12px; display: inline-flex; align-items: center;
      border: 1px solid var(--line); background: var(--card); font-size: 13px; font-weight: 600; border-radius: 2px;
    }
    .scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .scene-card {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); overflow: hidden;
    }
    .scene-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
    .scene-card .body { padding: 16px; }
    .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .news-card {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 18px;
      display: flex; flex-direction: column; min-height: 220px;
    }
    .news-card time { font-size: 12px; color: var(--brand); font-weight: 700; letter-spacing: .08em; }
    .news-card h3 { margin: 10px 0; font-size: 16px; }
    .news-card p { font-size: 14px; flex: 1; }
    .board {
      background: var(--steel); color: #fff; padding: 36px 0;
    }
    .board-grid { display: grid; grid-template-columns: 1.1fr repeat(3, 1fr); gap: 18px; align-items: center; }
    .board h2 { color: #fff; margin: 0 0 8px; font-size: 22px; }
    .board p { color: rgba(255,255,255,.7); }
    .board-item .num { font-size: 32px; color: var(--brand); }
    .board-item span { display: block; font-size: 13px; color: rgba(255,255,255,.72); }
    .faq-list { display: grid; gap: 8px; }
    .faq-item { border: 1px solid var(--line); background: var(--card); border-radius: var(--radius-card); overflow: hidden; }
    .faq-item button {
      width: 100%; text-align: left; min-height: 56px; padding: 14px 18px; display: flex; justify-content: space-between; gap: 12px;
      font-weight: 650; color: var(--ink);
    }
    .faq-item button em { font-style: normal; color: var(--brand); font-weight: 700; }
    .faq-panel { display: none; padding: 0 18px 16px; background: var(--bg); color: var(--ink-soft); }
    .faq-item.is-open .faq-panel { display: block; }
    .cta-band {
      position: relative; padding: var(--space-m) 0; color: #fff; overflow: hidden; background: var(--steel-deep);
    }
    .cta-band .bg {
      position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .28;
    }
    .cta-band .container { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
    .cta-band h2 { color: #fff; }
    .cta-band p { color: rgba(255,255,255,.78); }
    .form {
      background: var(--card); color: var(--ink); padding: 22px; border-radius: var(--radius-card); border: 1px solid var(--line);
    }
    .form label { display: block; font-size: 13px; font-weight: 650; margin: 0 0 6px; }
    .req { color: var(--brand); }
    .form .field { margin-bottom: 12px; }
    .form input, .form select, .form textarea {
      width: 100%; min-height: 44px; border: 1px solid var(--line); background: #fff; padding: 8px 10px; border-radius: 4px; color: var(--ink);
    }
    .form textarea { min-height: 88px; resize: vertical; }
    .form input:focus, .form select:focus, .form textarea:focus { border-color: var(--brand); outline: none; }
    .form .error, .form.is-error input:invalid { border-color: var(--brand); }
    .form-note { font-size: 12px; color: var(--ink-soft); margin: 8px 0 14px; }
    .form-success {
      background: var(--card); padding: 28px 22px; border-left: 3px solid var(--brand-2); color: var(--ink);
    }
    .guard-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .guard-item {
      border: 1px solid var(--line); background: var(--card); padding: 18px; border-radius: var(--radius-card);
    }
    .guard-item .no { font-size: 12px; font-weight: 700; color: var(--brand); letter-spacing: .1em; margin-bottom: 8px; }
    .site-footer { background: var(--steel); color: rgba(255,255,255,.78); padding: 56px 0 24px; }
    .footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.1fr; gap: 28px; margin-bottom: 28px; }
    .site-footer h3 { color: #fff; font-size: 15px; margin-bottom: 12px; }
    .site-footer a { color: rgba(255,255,255,.78); }
    .site-footer a:hover { color: #fff; }
    .site-footer .logo { color: #fff; margin-bottom: 12px; }
    .footer-links { display: grid; gap: 8px; }
    .copy { border-top: 1px solid rgba(255,255,255,.1); padding-top: 16px; font-size: 12px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
    .err-msg { color: var(--brand); font-size: 13px; margin-bottom: 8px; }
    @media (max-width: 1199px) {
      .split, .split.reverse, .story-grid, .story-main, .dark-band .container, .cta-band .container { grid-template-columns: 1fr; }
      .module-grid { grid-template-columns: 1fr 1fr; }
      .module-grid .mod-card:first-child { grid-column: 1 / -1; }
      .adv-grid, .scene-grid, .news-grid, .metric-grid, .guard-grid { grid-template-columns: 1fr 1fr; }
      .track { grid-template-columns: 1fr 1fr; gap: 20px; }
      .track::before { display: none; }
      .work-axis::before { left: 12px; }
      .work-step { width: 100%; margin-left: 0 !important; padding-left: 28px; }
      .board-grid { grid-template-columns: 1fr 1fr; }
      .param-bar { grid-template-columns: 1fr 1fr; }
      .case-slice { grid-template-columns: 1fr; }
      .case-slice .result { white-space: normal; }
      .main-nav .container { grid-template-columns: auto 1fr auto; }
    }
    @media (max-width: 767px) {
      :root { --nav-h: 72px; }
      .util-bar { display: none; }
      .nav-links, .nav-cta { display: none; }
      .menu-toggle { display: inline-flex; }
      .main-nav .container { grid-template-columns: 1fr auto; min-height: 64px; }
      .container { width: min(100% - 28px, var(--container)); }
      .section { padding: 64px 0; }
      .hero, .hero-slider { min-height: 100svh; }
      .hero-copy { padding-top: 48px; }
      .adv-grid, .scene-grid, .news-grid, .metric-grid, .quotes, .guard-grid, .module-grid, .track, .param-bar, .board-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .module-grid .mod-card:first-child { grid-column: auto; }
      .pain-item { grid-template-columns: 1fr; }
      .hero-controls { bottom: 12px; }
      .story-mini { grid-template-columns: 1fr; }
      body.nav-open { overflow: hidden; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
    }

/* roulang page: index */
:root {
      --bg: #F4F1EA;
      --bg-alt: #E7E2D8;
      --ink: #1C1E19;
      --ink-soft: #4A4E45;
      --brand: #C45A22;
      --brand-deep: #A34716;
      --brand-2: #1E7A64;
      --steel: #2C312B;
      --steel-deep: #141613;
      --line: #C9C3B6;
      --card: #FFFDF8;
      --shadow: 0 6px 14px rgba(28, 30, 25, .06);
      --radius-card: 8px;
      --radius-btn: 4px;
      --container: 1240px;
      --nav-h: 108px;
      --ease: .22s ease;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }
    body {
      margin: 0;
      font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--ink);
      background: var(--bg);
      line-height: 1.75;
      font-size: 16px;
    }
    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 { line-height: 1.28; letter-spacing: -.02em; font-weight: 700; margin: 0 0 .6em; color: var(--ink); }
    h1 { font-size: clamp(28px, 4vw, 46px); }
    h2 { font-size: clamp(22px, 2.6vw, 32px); }
    h3 { font-size: 18px; font-weight: 600; }
    p { margin: 0 0 1em; color: var(--ink-soft); }
    p:last-child { margin-bottom: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
    ::selection { background: var(--brand); color: #fff; }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .num { font-variant-numeric: tabular-nums; font-weight: 700; letter-spacing: -.03em; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      font-size: 12px; font-weight: 700; letter-spacing: .12em; color: var(--brand); margin-bottom: 12px;
    }
    .eyebrow::before { content: ""; width: 16px; height: 2px; background: var(--brand); }
    .lead { max-width: 42em; }
    .site-header {
      position: sticky; top: 0; z-index: 80;
      background: rgba(244, 241, 234, .88);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid transparent;
    }
    .site-header.is-stuck { border-bottom-color: var(--line); }
    .util-bar {
      background: var(--bg-alt); color: var(--ink-soft); font-size: 12.5px; border-bottom: 1px solid var(--line);
    }
    .util-bar .container {
      display: flex; justify-content: space-between; align-items: center; min-height: 36px; gap: 16px;
    }
    .util-left, .util-right { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
    .util-bar a:hover { color: var(--brand); }
    .dot-sep::before { content: "·"; margin-right: 18px; color: var(--line); }
    .main-nav .container {
      display: grid; grid-template-columns: auto 1fr auto; align-items: center; min-height: 72px; gap: 20px;
    }
    .logo { display: flex; align-items: center; gap: 10px; color: var(--ink); }
    .logo-mark { width: 36px; height: 36px; flex: none; color: var(--brand); }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-size: 18px; font-weight: 700; letter-spacing: -.02em; }
    .logo-text span { font-size: 11px; color: var(--ink-soft); font-weight: 500; letter-spacing: .08em; }
    .nav-links { display: flex; justify-content: center; gap: 4px; }
    .nav-links a {
      position: relative; padding: 10px 12px; font-size: 14px; font-weight: 500; color: var(--ink);
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 6px; height: 2px;
      background: var(--brand); transform: scaleX(0); transform-origin: left; transition: transform var(--ease);
    }
    .nav-links a::before {
      content: ""; position: absolute; left: 0; top: 50%; width: 3px; height: 10px; margin-top: -5px;
      background: var(--brand-2); opacity: 0;
    }
    .nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
    .nav-links a.is-active::before { opacity: 1; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 18px; border-radius: var(--radius-btn);
      font-weight: 600; font-size: 14px; border: 1px solid transparent;
      transition: background var(--ease), color var(--ease), border-color var(--ease), transform .12s ease;
    }
    .btn:active { transform: translateY(1px); }
    .btn-solid { background: var(--brand); color: #fff; }
    .btn-solid:hover { background: var(--brand-deep); }
    .btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
    .btn-ghost:hover { background: var(--ink); color: var(--bg); }
    .btn-text { color: var(--brand-2); padding: 0; min-height: 0; }
    .btn-text:hover { color: var(--brand); }
    .menu-toggle {
      display: none; width: 44px; height: 44px; align-items: center; justify-content: center;
      border: 1px solid var(--line); border-radius: var(--radius-btn); background: var(--card);
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      display: block; width: 18px; height: 2px; background: var(--ink); 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 {
      position: fixed; inset: 0; background: var(--steel); color: #fff; z-index: 90;
      transform: translateX(100%); transition: transform .28s ease; display: flex; flex-direction: column;
      padding: 24px 24px 32px;
    }
    .drawer.is-open { transform: none; }
    .drawer-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
    .drawer a { color: #fff; }
    .drawer-links a {
      display: flex; align-items: center; min-height: 52px; font-size: 22px; font-weight: 600;
      border-bottom: 1px solid rgba(255,255,255,.08);
    }
    .drawer-foot { margin-top: auto; display: grid; gap: 10px; font-size: 14px; color: rgba(255,255,255,.78); }
    .drawer-close { width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.2); color: #fff; border-radius: 4px; }
    main { overflow: hidden; }
    .section { padding: 88px 0; position: relative; }
    .section-alt { background: var(--bg-alt); }
    .section-head { margin-bottom: 36px; max-width: 42em; }
    .section-head h2 { margin-bottom: 12px; }
    .hero { position: relative; min-height: min(90vh, 780px); background: #d8cfc0; overflow: hidden; }
    .hero-slider { position: relative; min-height: min(90vh, 780px); }
    .hero-slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .7s ease, visibility .7s;
    }
    .hero-slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
    .hero-slide img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.86) contrast(.96) brightness(1.06); }
    .hero-slide::after {
      content: ""; position: absolute; inset: 0;
      background:
        radial-gradient(ellipse at 16% 12%, rgba(255, 248, 232, .72), transparent 46%),
        radial-gradient(ellipse at 80% 90%, rgba(196, 90, 34, .12), transparent 40%),
        linear-gradient(108deg, rgba(244,241,234,.78) 0%, rgba(244,241,234,.42) 38%, rgba(28,30,25,.28) 100%);
    }
    .hero-copy {
      position: relative; z-index: 2; width: min(100% - 40px, var(--container)); margin: 0 auto;
      padding: 78px 0 110px; max-width: 740px;
    }
    .hero-copy .kicker { color: var(--brand-deep); font-size: 13px; font-weight: 700; letter-spacing: .18em; margin-bottom: 14px; }
    .hero-copy h1, .hero-copy .slide-title {
      color: var(--ink); font-size: clamp(28px, 4.2vw, 48px); margin: 0 0 12px;
      text-shadow: 0 1px 0 rgba(255,253,248,.5);
    }
    .hero-copy .sub { font-size: 18px; color: var(--ink); font-weight: 600; margin-bottom: 16px; }
    .hero-copy .intro { color: var(--ink-soft); max-width: 40em; margin-bottom: 22px; }
    .chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
    .chip {
      display: inline-flex; align-items: center; gap: 8px; min-height: 36px; padding: 0 12px;
      background: rgba(255,253,248,.82); border: 1px solid var(--line); border-radius: 4px; font-size: 13px; font-weight: 600;
    }
    .chip i { width: 7px; height: 7px; background: var(--brand-2); display: block; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
    .verify { font-size: 13px; color: var(--ink-soft); }
    .hero-controls {
      position: absolute; z-index: 3; left: 0; right: 0; bottom: 22px;
      width: min(100% - 40px, var(--container)); margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between; gap: 12px;
    }
    .hero-arrows { display: flex; gap: 8px; }
    .icon-btn {
      width: 44px; height: 44px; border: 1px solid rgba(28,30,25,.25); color: var(--ink); border-radius: 4px;
      background: rgba(255,253,248,.7); display: grid; place-items: center;
    }
    .icon-btn:hover { background: var(--brand); border-color: var(--brand); color: #fff; }
    .hero-dots { display: flex; gap: 8px; }
    .hero-dots button { width: 44px; height: 44px; display: grid; place-items: center; }
    .hero-dots button i { width: 10px; height: 10px; border: 1px solid var(--ink); display: block; }
    .hero-dots button.is-active i { background: var(--brand); border-color: var(--brand); }
    .split { display: grid; grid-template-columns: .92fr 1.08fr; gap: 48px; align-items: center; }
    .split.reverse { grid-template-columns: 1.08fr .92fr; }
    .media { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--card); }
    .media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform .5s ease; }
    .media:hover img { transform: scale(1.03); }
    .pain-list { display: grid; gap: 14px; }
    .pain-item {
      display: grid; grid-template-columns: 76px 1fr; gap: 14px; padding: 16px;
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); border-left: 3px solid transparent;
      transition: border-color var(--ease), box-shadow var(--ease);
    }
    .pain-item:hover { border-left-color: var(--brand); box-shadow: var(--shadow); }
    .pain-item .tag { font-size: 12px; font-weight: 700; color: var(--brand); letter-spacing: .08em; padding-top: 4px; }
    .pain-item h3 { margin-bottom: 6px; }
    .pain-item p { font-size: 14.5px; }
    .param-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 24px; }
    .param-bar div { background: var(--card); padding: 14px 12px; }
    .param-bar strong { display: block; font-size: 14px; color: var(--ink); }
    .param-bar span { font-size: 12px; color: var(--ink-soft); }
    .protocol { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .badge {
      display: inline-flex; align-items: center; min-height: 28px; padding: 0 8px;
      border: 1px solid var(--line); background: var(--bg); font-size: 12px; font-weight: 700; letter-spacing: .06em; border-radius: 2px;
    }
    .highlights { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .hl-card {
      background: var(--card); border: 1px solid var(--line); padding: 22px 18px; border-radius: var(--radius-card);
      border-top: 3px solid transparent; transition: border-color var(--ease);
    }
    .hl-card:hover { border-top-color: var(--brand); }
    .hl-card .no { font-size: 12px; font-weight: 700; color: var(--brand); letter-spacing: .12em; margin-bottom: 8px; }
    .track { display: grid; grid-template-columns: repeat(4, 1fr); position: relative; }
    .track::before { content: ""; position: absolute; left: 4%; right: 4%; top: 28px; height: 1px; background: var(--line); }
    .track-step { padding-right: 16px; position: relative; }
    .track-step .idx {
      width: 56px; height: 56px; border: 1px solid var(--line); background: var(--card); display: grid; place-items: center;
      font-size: 12px; font-weight: 700; margin-bottom: 16px; position: relative; z-index: 1;
    }
    .track-step p { font-size: 14.5px; }
    .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .adv-card {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 22px 20px 20px;
      border-left: 3px solid transparent; transition: border-color var(--ease), box-shadow var(--ease);
    }
    .adv-card:hover { border-left-color: var(--brand); box-shadow: var(--shadow); }
    .adv-card .lamp { width: 8px; height: 8px; background: var(--line); margin-bottom: 14px; }
    .adv-card:hover .lamp { background: var(--brand-2); }
    .adv-card .metric { font-size: 13px; color: var(--brand); font-weight: 700; margin-top: 10px; }
    .work-axis { display: grid; gap: 22px; position: relative; }
    .work-axis::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: var(--line); }
    .work-step {
      width: min(46%, 520px); background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
      padding: 22px; border-top: 3px solid transparent;
    }
    .work-step:hover { border-top-color: var(--brand); }
    .work-step:nth-child(odd) { margin-right: auto; }
    .work-step:nth-child(even) { margin-left: auto; }
    .work-step .badge { margin-bottom: 10px; background: var(--ink); color: #fff; border-color: var(--ink); }
    .module-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 16px; }
    .mod-card {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); overflow: hidden;
      display: flex; flex-direction: column; border-top: 3px solid transparent; transition: border-color var(--ease);
    }
    .mod-card:hover { border-top-color: var(--brand); }
    .mod-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform .5s ease; }
    .mod-card:hover img { transform: scale(1.03); }
    .mod-card .body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .mod-card li { position: relative; padding-left: 14px; font-size: 14.5px; color: var(--ink-soft); margin-bottom: 6px; }
    .mod-card li::before { content: ""; width: 6px; height: 6px; background: var(--brand); position: absolute; left: 0; top: .55em; }
    .compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .compare article { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 24px; }
    .compare .before { border-top: 3px solid var(--line); }
    .compare .after { border-top: 3px solid var(--brand-2); }
    .compare li { padding: 8px 0 8px 16px; position: relative; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
    .compare li::before { content: ""; width: 7px; height: 7px; position: absolute; left: 0; top: 16px; background: var(--line); }
    .compare .after li::before { background: var(--brand-2); }
    .dark-band { background: var(--steel-deep); color: #fff; padding: 120px 0; position: relative; overflow: hidden; }
    .dark-band::before {
      content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .06;
      background-image: linear-gradient(#fff 1px, transparent 1px), linear-gradient(90deg, #fff 1px, transparent 1px);
      background-size: 48px 48px;
    }
    .dark-band .container { position: relative; display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; }
    .dark-band h2, .dark-band h3 { color: #fff; }
    .dark-band p { color: rgba(255,255,255,.78); }
    .case-slices { display: grid; gap: 12px; }
    .case-slice {
      border: 1px solid rgba(255,255,255,.12); padding: 18px;
      display: grid; grid-template-columns: 120px 1fr auto; gap: 12px; align-items: center;
    }
    .case-slice .ind { color: var(--brand); font-size: 12px; font-weight: 700; letter-spacing: .08em; }
    .case-slice .result { color: #7dceb8; font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
    .story-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 16px; }
    .story-main {
      display: grid; grid-template-columns: 1.1fr .9fr; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); overflow: hidden;
    }
    .story-main img { width: 100%; height: 100%; object-fit: cover; min-height: 280px; }
    .story-main blockquote { margin: 0; padding: 28px; font-size: 17px; color: var(--ink); }
    .story-main cite { display: block; margin-top: 16px; font-style: normal; font-size: 13px; color: var(--ink-soft); }
    .story-side { display: grid; gap: 16px; }
    .story-mini {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 18px;
      display: grid; grid-template-columns: 72px 1fr; gap: 12px; border-left: 3px solid transparent;
    }
    .story-mini:hover { border-left-color: var(--brand); }
    .story-mini img { width: 72px; height: 72px; object-fit: cover; }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .metric-card { background: var(--card); border: 1px solid var(--line); padding: 22px 18px; border-radius: var(--radius-card); }
    .metric-card .num { font-size: 36px; color: var(--brand); display: block; line-height: 1.1; }
    .metric-card .unit { font-size: 14px; font-weight: 600; color: var(--ink); }
    .metric-card p { font-size: 13px; margin-top: 10px; }
    .quotes { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .quote-card { background: var(--card); border: 1px solid var(--line); padding: 22px; border-radius: var(--radius-card); }
    .quote-card p { color: var(--ink); }
    .quote-meta { margin-top: 14px; font-size: 13px; color: var(--ink-soft); display: flex; justify-content: space-between; gap: 8px; }
    .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
    .tag-pill {
      min-height: 36px; padding: 0 12px; display: inline-flex; align-items: center;
      border: 1px solid var(--line); background: var(--card); font-size: 13px; font-weight: 600; border-radius: 2px;
    }
    .scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .scene-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); overflow: hidden; }
    .scene-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
    .scene-card .body { padding: 16px; }
    .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .news-card {
      background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 18px;
      display: flex; flex-direction: column; min-height: 220px;
    }
    .news-card time { font-size: 12px; color: var(--brand); font-weight: 700; letter-spacing: .08em; }
    .news-card h3 { margin: 10px 0; font-size: 16px; }
    .news-card p { font-size: 14px; flex: 1; }
    .board { background: var(--steel); color: #fff; padding: 36px 0; }
    .board-grid { display: grid; grid-template-columns: 1.1fr repeat(3, 1fr); gap: 18px; align-items: center; }
    .board h2 { color: #fff; margin: 0 0 8px; font-size: 22px; }
    .board p { color: rgba(255,255,255,.7); }
    .board-item .num { font-size: 32px; color: var(--brand); }
    .board-item span { display: block; font-size: 13px; color: rgba(255,255,255,.72); }
    .myth-list { display: grid; gap: 10px; }
    .myth {
      display: grid; grid-template-columns: 88px 1fr; gap: 16px; background: var(--card);
      border: 1px solid var(--line); padding: 16px 18px; border-radius: var(--radius-card);
    }
    .myth strong { color: var(--brand); font-size: 13px; }
    .faq-list { display: grid; gap: 8px; }
    .faq-item { border: 1px solid var(--line); background: var(--card); border-radius: var(--radius-card); overflow: hidden; }
    .faq-item button {
      width: 100%; text-align: left; min-height: 56px; padding: 14px 18px; display: flex; justify-content: space-between; gap: 12px;
      font-weight: 600; color: var(--ink);
    }
    .faq-item button em { font-style: normal; color: var(--brand); font-weight: 700; }
    .faq-panel { display: none; padding: 0 18px 16px; background: var(--bg); color: var(--ink-soft); }
    .faq-item.is-open .faq-panel { display: block; }
    .cta-band { position: relative; padding: 120px 0; color: #fff; overflow: hidden; background: var(--steel-deep); }
    .cta-band .bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .28; }
    .cta-band .container { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
    .cta-band h2 { color: #fff; }
    .cta-band p { color: rgba(255,255,255,.78); }
    .cta-band a { color: #fff; }
    .form { background: var(--card); color: var(--ink); padding: 22px; border-radius: var(--radius-card); border: 1px solid var(--line); }
    .form label { display: block; font-size: 13px; font-weight: 600; margin: 0 0 6px; }
    .req { color: var(--brand); }
    .form .field { margin-bottom: 12px; }
    .form input, .form select, .form textarea {
      width: 100%; min-height: 44px; border: 1px solid var(--line); background: #fff; padding: 8px 10px; border-radius: 4px; color: var(--ink);
    }
    .form textarea { min-height: 88px; resize: vertical; }
    .form input:focus, .form select:focus, .form textarea:focus { border-color: var(--brand); outline: none; }
    .form .error { border-color: var(--brand); }
    .form-note { font-size: 12px; color: var(--ink-soft); margin: 8px 0 14px; }
    .form-success { background: var(--card); padding: 28px 22px; border-left: 3px solid var(--brand-2); color: var(--ink); }
    .err-msg { color: var(--brand); font-size: 13px; margin-bottom: 8px; }
    .site-footer { background: var(--steel); color: rgba(255,255,255,.78); padding: 56px 0 24px; }
    .footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.1fr; gap: 28px; margin-bottom: 28px; }
    .site-footer h3 { color: #fff; font-size: 15px; margin-bottom: 12px; }
    .site-footer a { color: rgba(255,255,255,.78); }
    .site-footer a:hover { color: #fff; }
    .site-footer .logo { color: #fff; margin-bottom: 12px; }
    .footer-links { display: grid; gap: 8px; }
    .copy { border-top: 1px solid rgba(255,255,255,.1); padding-top: 16px; font-size: 12px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
    @media (max-width: 1199px) {
      .split, .split.reverse, .story-grid, .story-main, .dark-band .container, .cta-band .container, .compare { grid-template-columns: 1fr; }
      .module-grid { grid-template-columns: 1fr 1fr; }
      .module-grid .mod-card:first-child { grid-column: 1 / -1; }
      .adv-grid, .scene-grid, .news-grid, .metric-grid, .highlights { grid-template-columns: 1fr 1fr; }
      .track { grid-template-columns: 1fr 1fr; gap: 20px; }
      .track::before { display: none; }
      .work-axis::before { left: 12px; }
      .work-step { width: 100%; margin-left: 0 !important; padding-left: 28px; }
      .board-grid { grid-template-columns: 1fr 1fr; }
      .param-bar { grid-template-columns: 1fr 1fr; }
      .case-slice { grid-template-columns: 1fr; }
      .case-slice .result { white-space: normal; }
    }
    @media (max-width: 767px) {
      :root { --nav-h: 72px; }
      .util-bar { display: none; }
      .nav-links, .nav-cta { display: none; }
      .menu-toggle { display: inline-flex; }
      .main-nav .container { grid-template-columns: 1fr auto; min-height: 64px; }
      .container { width: min(100% - 28px, var(--container)); }
      .section { padding: 64px 0; }
      .hero, .hero-slider { min-height: 100svh; }
      .hero-copy { padding-top: 48px; }
      .adv-grid, .scene-grid, .news-grid, .metric-grid, .quotes, .module-grid, .track, .param-bar, .board-grid, .footer-grid, .highlights {
        grid-template-columns: 1fr;
      }
      .module-grid .mod-card:first-child { grid-column: auto; }
      .pain-item, .myth, .story-mini { grid-template-columns: 1fr; }
      .hero-controls { bottom: 12px; }
      body.nav-open { overflow: hidden; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
    }