/* roulang page: index */
:root {
      --bg: #F6F8FB;
      --surface: #FFFFFF;
      --primary: #2F6FED;
      --primary-ink: #1E4FD6;
      --accent: #1AA6A6;
      --text: #1C2430;
      --muted: #5B6775;
      --line: #E6EBF2;
      --dark-block: #1B2A44;
      --shadow: 0 10px 28px rgba(28, 47, 82, 0.08);
      --shadow-hover: 0 16px 36px rgba(28, 47, 82, 0.14);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 999px;
      --container: 1200px;
      --space-pc: 88px;
      --space-m: 56px;
      --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.8;
      color: var(--text);
      background: var(--bg);
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, textarea, select { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4, p { margin: 0; }
    p + p { margin-top: 0.75em; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 3px;
    }
    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }
    .section {
      padding: var(--space-pc) 0;
      position: relative;
    }
    .section-alt { background: var(--surface); }
    .section-soft { background: var(--bg); }
    .section-head { max-width: 760px; margin-bottom: 40px; }
    .section-head.wide { max-width: 880px; }
    .kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary-ink);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.08em;
      margin-bottom: 12px;
    }
    .kicker i { color: var(--accent); font-size: 10px; }
    .section-head h2, .block-title {
      font-size: 30px;
      line-height: 1.35;
      font-weight: 700;
      letter-spacing: 0.01em;
      color: var(--text);
    }
    .section-head p, .lead {
      margin-top: 14px;
      color: var(--muted);
      font-size: 16px;
      line-height: 1.85;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 10px 20px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      line-height: 1.2;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 8px 18px rgba(47, 111, 237, 0.22);
    }
    .btn-primary:hover, .btn-primary:active {
      background: var(--primary-ink);
      transform: translateY(-2px);
      box-shadow: 0 12px 22px rgba(30, 79, 214, 0.28);
    }
    .btn-ghost {
      background: transparent;
      color: var(--primary-ink);
      border: 1px solid #C9D8F6;
    }
    .btn-ghost:hover, .btn-ghost:active {
      background: #EEF4FF;
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    .btn-white {
      background: #fff;
      color: var(--primary-ink);
    }
    .btn-white:hover { background: #F3F7FF; transform: translateY(-2px); }
    .btn-line-light {
      border: 1px solid rgba(255,255,255,.55);
      color: #fff;
    }
    .btn-line-light:hover { background: rgba(255,255,255,.1); }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 32px;
      padding: 4px 12px;
      border-radius: var(--radius-badge);
      background: #EEF4FF;
      color: var(--primary-ink);
      font-size: 12px;
      font-weight: 600;
    }
    .badge .dot {
      width: 6px; height: 6px; border-radius: 50%;
      background: var(--accent);
    }
    .card {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow);
      transition: transform .25s ease, box-shadow .25s ease;
    }
    .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .topbar {
      background: #EAF1FB;
      color: var(--muted);
      font-size: 13px;
      border-bottom: 1px solid #D9E4F4;
    }
    .topbar-inner {
      min-height: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .topbar-left, .topbar-right, .top-links {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px 18px;
    }
    .topbar a:hover { color: var(--primary-ink); }
    .topbar .mini-cta {
      min-height: 32px;
      padding: 4px 12px;
      border-radius: 8px;
      background: var(--primary);
      color: #fff;
      font-weight: 600;
    }
    .topbar .mini-cta:hover { background: var(--primary-ink); color: #fff; }
    .main-nav {
      position: sticky;
      top: 0;
      z-index: 60;
      background: var(--surface);
      border-bottom: 1px solid transparent;
      transition: box-shadow .2s ease, border-color .2s ease;
    }
    .main-nav.is-stuck {
      border-bottom-color: var(--line);
      box-shadow: 0 8px 24px rgba(28, 47, 82, 0.06);
    }
    .nav-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 44px;
      flex-shrink: 0;
    }
    .brand-mark {
      width: 36px; height: 36px;
      border-radius: 10px;
      background: linear-gradient(180deg, #4C86F4, #2F6FED);
      display: grid; place-items: center;
      box-shadow: 0 6px 14px rgba(47,111,237,.28);
      position: relative;
    }
    .brand-mark::after {
      content: "";
      position: absolute;
      right: 5px; top: 5px;
      width: 7px; height: 7px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 2px rgba(255,255,255,.35);
    }
    .brand-name {
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: 0.02em;
    }
    .brand-name em {
      font-style: normal;
      color: var(--primary-ink);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px 4px;
      flex: 1;
      justify-content: center;
    }
    .nav-links a {
      min-height: 44px;
      padding: 8px 12px;
      border-radius: 8px;
      color: var(--text);
      font-size: 15px;
      font-weight: 500;
    }
    .nav-links a:hover, .nav-links a.is-active {
      color: var(--primary-ink);
      background: #F3F7FF;
    }
    .nav-cta { display: flex; align-items: center; gap: 10px; }
    .menu-toggle {
      display: none;
      width: 44px; height: 44px;
      border-radius: 8px;
      border: 1px solid var(--line);
      color: var(--text);
    }
    .menu-toggle:hover { background: #F3F7FF; }
    .drawer {
      position: fixed;
      inset: 0;
      z-index: 80;
      pointer-events: none;
      visibility: hidden;
    }
    .drawer.is-open { pointer-events: auto; visibility: visible; }
    .drawer-mask {
      position: absolute; inset: 0;
      background: rgba(27, 42, 68, .42);
      opacity: 0;
      transition: opacity .25s ease;
    }
    .drawer.is-open .drawer-mask { opacity: 1; }
    .drawer-panel {
      position: absolute;
      top: 0; right: 0; bottom: 0;
      width: min(86vw, 360px);
      background: #fff;
      padding: 24px 20px;
      transform: translateX(100%);
      transition: transform .28s ease;
      box-shadow: -12px 0 32px rgba(28,47,82,.12);
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .drawer.is-open .drawer-panel { transform: none; }
    .drawer-panel a {
      min-height: 44px;
      display: flex;
      align-items: center;
      padding: 10px 12px;
      border-radius: 8px;
      font-weight: 600;
    }
    .drawer-panel a:hover { background: #F3F7FF; color: var(--primary-ink); }
    .hero {
      padding: 0;
      background: #0F1C33;
    }
    .hero-carousel {
      position: relative;
      min-height: 640px;
      overflow: hidden;
    }
    .hero-slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      visibility: hidden;
      transition: opacity .55s ease, visibility .55s ease;
    }
    .hero-slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
    .hero-slide img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .hero-mask {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(15, 28, 51, .78) 0%, rgba(15, 28, 51, .52) 46%, rgba(15, 28, 51, .18) 100%),
        linear-gradient(180deg, rgba(15, 28, 51, .12) 0%, rgba(15, 28, 51, .45) 100%);
    }
    .hero-copy {
      position: relative;
      z-index: 2;
      min-height: 640px;
      display: flex;
      align-items: center;
      padding: 72px 0 88px;
    }
    .hero-board {
      max-width: 680px;
      background: rgba(246, 248, 251, .92);
      border: 1px solid rgba(255,255,255,.55);
      border-radius: 16px;
      padding: 32px 32px 28px;
      box-shadow: 0 18px 40px rgba(10, 22, 44, .18);
    }
    .hero-board h1, .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 700;
      color: var(--text);
    }
    .hero-board .hero-lead {
      margin-top: 16px;
      color: var(--muted);
      font-size: 16px;
      line-height: 1.85;
    }
    .hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .qualify {
      margin-top: 14px;
      font-size: 13px;
      color: var(--muted);
      background: #fff;
      border: 1px dashed #D5DEEA;
      border-radius: 8px;
      padding: 10px 12px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
    .hero-nav-btn {
      position: absolute;
      top: 50%;
      z-index: 3;
      width: 44px; height: 44px;
      margin-top: -22px;
      border-radius: 8px;
      background: rgba(255,255,255,.92);
      color: var(--text);
      box-shadow: var(--shadow);
    }
    .hero-nav-btn:hover { background: #fff; color: var(--primary-ink); }
    .hero-nav-btn.prev { left: 18px; }
    .hero-nav-btn.next { right: 18px; }
    .hero-dots {
      position: absolute;
      left: 50%;
      bottom: 22px;
      transform: translateX(-50%);
      z-index: 3;
      display: flex;
      gap: 8px;
    }
    .hero-dot {
      width: 28px; height: 6px;
      border-radius: 99px;
      background: rgba(255,255,255,.38);
    }
    .hero-dot.is-active { background: #fff; width: 42px; }
    .hero-pause {
      position: absolute;
      right: 24px; bottom: 16px;
      z-index: 3;
      min-width: 44px; min-height: 44px;
      border-radius: 8px;
      background: rgba(255,255,255,.9);
      color: var(--text);
      font-size: 13px;
      font-weight: 600;
      padding: 0 12px;
    }
    .pain-strip {
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      gap: 18px;
    }
    .pain-item {
      padding: 8px 4px 8px 0;
      border-top: 2px solid var(--line);
    }
    .pain-item i {
      width: 40px; height: 40px;
      border-radius: 50%;
      display: grid; place-items: center;
      background: #EEF4FF;
      color: var(--primary);
      margin-bottom: 14px;
    }
    .pain-item h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
    .pain-item p { color: var(--muted); font-size: 14px; line-height: 1.7; }
    .split {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 48px;
      align-items: center;
    }
    .shot {
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      aspect-ratio: 16/10;
      background: #fff;
    }
    .shot img { width: 100%; height: 100%; object-fit: cover; }
    .fact-box {
      margin-top: 18px;
      padding: 16px 18px;
      border-radius: 12px;
      background: #F3F7FF;
      border: 1px solid #D9E6FB;
      color: var(--text);
      font-size: 14px;
    }
    .check-list { margin-top: 16px; display: grid; gap: 10px; }
    .check-list li {
      display: flex; gap: 10px; align-items: flex-start;
      color: var(--muted); font-size: 15px;
    }
    .check-list i { color: var(--accent); margin-top: 6px; }
    .timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      position: relative;
    }
    .timeline::before {
      content: "";
      position: absolute;
      top: 28px; left: 8%; right: 8%;
      height: 2px;
      background: #D7E3F6;
    }
    .step {
      position: relative;
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: 12px;
      padding: 24px 20px 22px;
      box-shadow: var(--shadow);
    }
    .step-no {
      width: 44px; height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: grid; place-items: center;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
    }
    .step h3 { font-size: 18px; margin-bottom: 8px; }
    .step p { color: var(--muted); font-size: 14px; }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .adv-card { padding: 28px 24px 24px; min-height: 236px; }
    .icon-round {
      width: 48px; height: 48px;
      border-radius: 50%;
      background: #EEF4FF;
      color: var(--primary);
      display: grid; place-items: center;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .adv-card h3 { font-size: 18px; margin-bottom: 10px; }
    .adv-card p { color: var(--muted); font-size: 14px; line-height: 1.8; }
    .prod-grid {
      display: grid;
      grid-template-columns: 1.2fr .9fr .9fr;
      gap: 22px;
    }
    .prod-card { overflow: hidden; display: flex; flex-direction: column; }
    .prod-card .cover { aspect-ratio: 16/10; overflow: hidden; }
    .prod-card .cover img { width: 100%; height: 100%; object-fit: cover; }
    .prod-body { padding: 22px 22px 20px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
    .prod-body h3 { font-size: 20px; }
    .prod-body ul { display: grid; gap: 8px; color: var(--muted); font-size: 14px; }
    .prod-body li { padding-left: 14px; position: relative; }
    .prod-body li::before {
      content: "";
      width: 6px; height: 6px; border-radius: 50%;
      background: var(--accent);
      position: absolute; left: 0; top: 9px;
    }
    .prod-card.featured { background: #F7FAFF; }
    .dark-block {
      background: var(--dark-block);
      color: #E7EEF8;
      padding: var(--space-pc) 0;
    }
    .dark-grid {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 40px;
      align-items: center;
    }
    .dark-quote {
      font-size: 28px;
      line-height: 1.45;
      font-weight: 700;
      color: #fff;
    }
    .dark-quote span { color: #9EC2FF; }
    .case-bar {
      background: rgba(255,255,255,.04);
      border: 1px solid rgba(255,255,255,.08);
      border-left: 3px solid var(--accent);
      border-radius: 10px;
      padding: 16px 18px;
      margin-bottom: 12px;
    }
    .case-bar h3 { color: #fff; font-size: 16px; margin-bottom: 6px; }
    .case-bar p { color: #C5D0E0; font-size: 14px; }
    .stats-band {
      background: #EAF2FF;
      border-top: 1px solid #D7E4FA;
      border-bottom: 1px solid #D7E4FA;
      padding: 42px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      text-align: left;
    }
    .stat-num {
      font-size: 40px;
      font-weight: 700;
      color: var(--primary-ink);
      line-height: 1.1;
      letter-spacing: -0.03em;
    }
    .stat-num small { font-size: 16px; margin-left: 4px; font-weight: 600; }
    .stat-label { margin-top: 8px; color: var(--muted); font-size: 14px; }
    .story-grid {
      display: grid;
      grid-template-columns: 1.35fr .82fr;
      gap: 22px;
    }
    .story-side { display: grid; gap: 22px; }
    .story-main, .story-mini { overflow: hidden; }
    .story-main .cover { height: 280px; }
    .story-mini .cover { height: 140px; }
    .story-main .cover img, .story-mini .cover img { width: 100%; height: 100%; object-fit: cover; }
    .story-body { padding: 22px; }
    .story-role {
      font-size: 12px; font-weight: 700; color: var(--primary-ink);
      letter-spacing: .06em; margin-bottom: 8px;
    }
    .story-body h3 { font-size: 20px; margin-bottom: 8px; }
    .story-body p { color: var(--muted); font-size: 14px; }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }
    .review-card {
      padding: 26px 22px 22px;
      position: relative;
    }
    .review-card::before {
      content: "“";
      position: absolute;
      top: 8px; left: 16px;
      font-size: 42px;
      color: #D5E3FA;
      font-family: Georgia, serif;
      line-height: 1;
    }
    .review-card p { color: var(--text); font-size: 15px; margin-top: 18px; min-height: 88px; }
    .review-meta { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
    .review-meta strong { display: block; font-size: 14px; }
    .review-meta span { color: var(--muted); font-size: 13px; }
    .role-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .role-card {
      padding: 22px 20px;
      display: grid;
      gap: 8px;
    }
    .role-card h3 { font-size: 18px; }
    .role-card p { color: var(--muted); font-size: 14px; }
    .tag {
      display: inline-flex;
      min-height: 28px;
      align-items: center;
      padding: 0 10px;
      border-radius: 999px;
      background: #F1F6EE;
      color: #1A7A72;
      font-size: 12px;
      font-weight: 600;
      width: fit-content;
    }
    .scene-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 48px;
    }
    .scene-row:last-child { margin-bottom: 0; }
    .scene-row.reverse { direction: rtl; }
    .scene-row.reverse > * { direction: ltr; }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .news-card { overflow: hidden; display: flex; flex-direction: column; }
    .news-card .cover { height: 148px; }
    .news-card .cover img { width: 100%; height: 100%; object-fit: cover; }
    .news-body { padding: 16px 16px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
    .news-date { font-size: 12px; color: var(--muted); }
    .news-body h3 { font-size: 16px; line-height: 1.5; }
    .news-body p { color: var(--muted); font-size: 13px; }
    .news-link {
      margin-top: auto;
      color: var(--primary-ink);
      font-weight: 600;
      font-size: 14px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
    }
    .metric-table {
      width: 100%;
      border-collapse: collapse;
      background: #fff;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--line);
    }
    .metric-table th, .metric-table td {
      text-align: left;
      padding: 16px 18px;
      border-bottom: 1px solid var(--line);
      font-size: 14px;
    }
    .metric-table th {
      background: #F3F7FF;
      color: var(--primary-ink);
      font-weight: 700;
      width: 28%;
    }
    .metric-table tr:last-child td, .metric-table tr:last-child th { border-bottom: 0; }
    .faq-list { display: grid; gap: 10px; }
    .faq-item {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 12px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }
    .faq-q {
      width: 100%;
      min-height: 56px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 14px 18px;
      text-align: left;
      font-size: 16px;
      font-weight: 650;
      color: var(--text);
    }
    .faq-q i { color: var(--primary); transition: transform .2s ease; }
    .faq-item.is-open .faq-q i { transform: rotate(180deg); }
    .faq-a {
      display: none;
      padding: 0 18px 18px;
      color: var(--muted);
      font-size: 15px;
    }
    .faq-item.is-open .faq-a { display: block; }
    .cta-band {
      background: linear-gradient(180deg, #E7F0FF 0%, #F6F8FB 100%);
      border-top: 1px solid #D7E4FA;
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1fr .92fr;
      gap: 36px;
      align-items: start;
    }
    .form-card { padding: 24px; }
    .form-grid { display: grid; gap: 12px; }
    .form-grid label { font-size: 13px; font-weight: 600; color: var(--text); }
    .form-grid input, .form-grid textarea, .form-grid select {
      width: 100%;
      min-height: 44px;
      border: 1px solid var(--line);
      border-radius: 8px;
      padding: 10px 12px;
      background: #fff;
      color: var(--text);
    }
    .form-grid textarea { min-height: 96px; resize: vertical; }
    .form-grid input:focus, .form-grid textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(47,111,237,.12);
      outline: none;
    }
    .form-error { color: #C03636; font-size: 13px; min-height: 18px; }
    .form-ok {
      display: none;
      margin-top: 10px;
      padding: 10px 12px;
      border-radius: 8px;
      background: #E8F7F2;
      color: #1A7A72;
      font-size: 14px;
    }
    .site-footer {
      background: #F3F6FA;
      border-top: 1px solid var(--line);
      padding: 48px 0 24px;
      color: var(--muted);
      font-size: 14px;
    }
    .foot-grid {
      display: grid;
      grid-template-columns: 1.3fr .8fr .9fr .9fr;
      gap: 28px;
      padding-bottom: 28px;
    }
    .foot-brand strong { display: block; color: var(--text); font-size: 16px; margin-bottom: 10px; }
    .foot-col h4 { color: var(--text); font-size: 15px; margin-bottom: 12px; }
    .foot-col a, .foot-col p { display: block; margin-bottom: 8px; }
    .foot-col a:hover { color: var(--primary-ink); }
    .copy {
      border-top: 1px solid var(--line);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      font-size: 13px;
    }
    .paper-grid {
      background-image:
        linear-gradient(rgba(47,111,237,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(47,111,237,.035) 1px, transparent 1px);
      background-size: 28px 28px;
    }
    @media (max-width: 1024px) {
      .section-head h2, .block-title { font-size: 28px; }
      .hero-board h1, .hero-title { font-size: 34px; }
      .nav-links { display: none; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .pain-strip { grid-template-columns: repeat(3, 1fr); }
      .split, .dark-grid, .story-grid, .cta-grid { grid-template-columns: 1fr; }
      .timeline { grid-template-columns: repeat(2, 1fr); }
      .timeline::before { display: none; }
      .adv-grid { grid-template-columns: repeat(2, 1fr); }
      .prod-grid { grid-template-columns: 1fr; }
      .stats-grid, .review-grid, .role-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .scene-row, .scene-row.reverse { grid-template-columns: 1fr; direction: ltr; }
    }
    @media (max-width: 768px) {
      .section { padding: var(--space-m) 0; }
      .topbar { display: none; }
      .hero-carousel, .hero-copy { min-height: 560px; }
      .hero-copy { align-items: flex-end; padding: 28px 0 72px; }
      .hero-board { padding: 22px 18px 18px; }
      .hero-board h1, .hero-title { font-size: 28px; }
      .pain-strip { grid-template-columns: 1fr 1fr; }
      .adv-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .container { padding: 0 16px; }
      .nav-inner { min-height: 64px; }
      .brand-name { font-size: 15px; }
      .hero-carousel, .hero-copy { min-height: 620px; }
      .hero-nav-btn.prev { left: 8px; }
      .hero-nav-btn.next { right: 8px; }
      .pain-strip, .timeline, .adv-grid, .stats-grid, .review-grid, .role-grid, .news-grid, .foot-grid {
        grid-template-columns: 1fr;
      }
      .hero-actions, .nav-cta .btn-ghost { width: 100%; }
      .btn { width: auto; }
      .metric-table th, .metric-table td { display: block; width: 100%; }
      .metric-table th { border-bottom: 0; padding-bottom: 4px; }
      .copy { flex-direction: column; }
      .section-head h2 { font-size: 24px; }
    }
    @media (max-width: 375px) {
      body { font-size: 15px; }
      .hero-board h1, .hero-title { font-size: 24px; }
      .stat-num { font-size: 32px; }
      .brand-mark { width: 32px; height: 32px; }
      .hero-pause { right: 12px; }
    }