/* roulang page: index */
:root {
      --blue: #3A6B96;
      --blue-deep: #2E5A88;
      --blue-mid: #3D6FA0;
      --blue-soft: #E7EEF5;
      --walnut: #8B6B4A;
      --walnut-soft: #F3EBE3;
      --linen: #E8E0D4;
      --fog: #D7DEE7;
      --bg: #F6F8FB;
      --paper: #FCFCFD;
      --ink: #1E2A36;
      --muted: #5C6B7A;
      --line: #E3E8EF;
      --radius: 14px;
      --radius-sm: 10px;
      --shadow: 0 10px 28px rgba(46, 90, 136, 0.08);
      --shadow-hover: 0 16px 36px rgba(46, 90, 136, 0.14);
      --header-h: 118px;
      --space: 104px;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--ink);
      background: var(--bg);
      overflow-x: hidden;
    }
    img { max-width: 100%; display: block; height: auto; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4 {
      font-family: "Noto Serif SC", "Songti SC", serif;
      font-weight: 700;
      line-height: 1.35;
      color: var(--ink);
    }
    .container { width: min(1220px, calc(100% - 40px)); margin: 0 auto; }
    .skip {
      position: absolute; left: -999px; top: 8px;
      background: var(--blue); color: #fff; padding: 8px 14px; border-radius: 8px;
    }
    .skip:focus { left: 12px; z-index: 80; }
    .site-header {
      position: sticky; top: 0; z-index: 50;
      background: rgba(252, 252, 253, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--line);
    }
    .nav-top, .nav-bottom { display: flex; align-items: center; }
    .nav-top {
      justify-content: space-between;
      min-height: 68px;
      gap: 16px;
    }
    .logo {
      display: flex; align-items: center; gap: 10px;
      min-height: 44px;
    }
    .logo-mark {
      width: 36px; height: 36px; border-radius: 10px;
      background: linear-gradient(160deg, var(--blue-mid), var(--blue-deep));
      display: grid; place-items: center;
      box-shadow: 0 6px 14px rgba(46, 90, 136, 0.22);
    }
    .logo-mark svg { width: 20px; height: 20px; fill: none; stroke: #fff; stroke-width: 1.7; }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-family: "Noto Serif SC", serif; font-size: 18px; letter-spacing: 0.04em; }
    .logo-text span { font-size: 12px; color: var(--muted); }
    .nav-meta { display: flex; align-items: center; gap: 22px; }
    .meta-item { display: flex; flex-direction: column; }
    .meta-item small { color: var(--muted); font-size: 12px; }
    .meta-item b { font-size: 15px; font-weight: 600; color: var(--blue-deep); }
    .btn {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 44px; padding: 0 20px; border-radius: 12px;
      font-weight: 600; transition: 0.22s ease;
      border: 1px solid transparent;
    }
    .btn:focus-visible, .nav-links a:focus-visible, .icon-btn:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, .faq-q:focus-visible {
      outline: 2px solid var(--blue-mid);
      outline-offset: 2px;
    }
    .btn-primary { background: var(--blue); color: #fff; }
    .btn-primary:hover { background: var(--blue-deep); transform: translateY(-2px); }
    .btn-primary:active { transform: translateY(0); }
    .btn-ghost {
      background: transparent; color: var(--blue-deep);
      border-color: rgba(46, 90, 136, 0.35);
    }
    .btn-ghost:hover { border-color: var(--blue); background: var(--blue-soft); transform: translateY(-2px); }
    .btn-wood { color: var(--walnut); border-color: #d8c4ad; background: #fff; }
    .btn-wood:hover { background: var(--walnut-soft); transform: translateY(-2px); }
    .nav-bottom {
      min-height: 50px;
      border-top: 1px solid var(--line);
      justify-content: space-between;
    }
    .nav-links { display: flex; gap: 4px; flex-wrap: wrap; }
    .nav-links a {
      display: inline-flex; align-items: center;
      min-height: 44px; padding: 0 12px; border-radius: 10px;
      color: var(--muted); font-size: 14px; font-weight: 500;
    }
    .nav-links a:hover { color: var(--blue-deep); background: var(--blue-soft); }
    .nav-links a.active { color: var(--blue-deep); background: var(--blue-soft); }
    .nav-toggle, .phone-icon { display: none; }
    .icon-btn {
      width: 44px; height: 44px; border-radius: 10px;
      display: grid; place-items: center; color: var(--blue-deep);
    }
    .hero { position: relative; min-height: calc(100vh - var(--header-h)); overflow: hidden; background: #203246; }
    .slides { position: relative; min-height: inherit; }
    .slide {
      position: absolute; inset: 0; opacity: 0; pointer-events: none;
      transition: opacity 0.6s ease;
      background-size: cover; background-position: center;
    }
    .slide.is-on { opacity: 1; pointer-events: auto; position: relative; }
    .slide::after {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(18, 32, 48, 0.72) 0%, rgba(18, 32, 48, 0.42) 48%, rgba(18, 32, 48, 0.18) 100%);
    }
    .hero-copy {
      position: relative; z-index: 2;
      width: min(680px, 92%);
      padding: 88px 0 92px;
      color: #f7f4ef;
    }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      min-height: 32px; padding: 0 12px; border-radius: 999px;
      background: rgba(255,255,255,0.12); color: #f3eadf; font-size: 13px;
      border: 1px solid rgba(255,255,255,0.18);
    }
    .hero h1 { color: #fff; font-size: clamp(32px, 4.4vw, 52px); margin: 16px 0 14px; }
    .hero-lead { font-size: 16px; line-height: 1.85; color: rgba(255,255,255,0.9); margin-bottom: 26px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-ctrl { position: absolute; inset: auto 24px 24px auto; z-index: 3; display: flex; gap: 8px; }
    .hero-ctrl button, .hero-nav button {
      width: 44px; height: 44px; border-radius: 50%;
      background: rgba(255,255,255,0.16); color: #fff; border: 1px solid rgba(255,255,255,0.28);
    }
    .hero-ctrl button:hover { background: rgba(255,255,255,0.28); }
    .hero-nav {
      position: absolute; left: 0; right: 0; top: 50%;
      transform: translateY(-50%); z-index: 3;
      display: flex; justify-content: space-between; padding: 0 16px; pointer-events: none;
    }
    .hero-nav button { pointer-events: auto; }
    .dots { display: flex; gap: 8px; margin-top: 28px; }
    .dots button {
      width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.35);
    }
    .dots button.on { width: 28px; border-radius: 8px; background: #fff; }
    main section { padding: var(--space) 0; }
    .sec-head { max-width: 720px; margin-bottom: 36px; }
    .sec-head h2 { font-size: clamp(26px, 3vw, 36px); margin-bottom: 12px; }
    .sec-head p { color: var(--muted); }
    .kicker { color: var(--blue); font-size: 13px; font-weight: 600; letter-spacing: 0.08em; margin-bottom: 8px; }
    .pain {
      display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 36px; align-items: stretch;
    }
    .pain-list { display: grid; gap: 14px; }
    .pain-item {
      background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
      padding: 18px 20px; box-shadow: var(--shadow);
    }
    .pain-item h3 { font-size: 18px; margin-bottom: 6px; }
    .pain-item p { color: var(--muted); font-size: 15px; }
    .pain-visual {
      border-radius: 18px; overflow: hidden; min-height: 420px;
      background: #d9e2ea center/cover no-repeat; position: relative;
      box-shadow: var(--shadow);
    }
    .pain-visual span {
      position: absolute; left: 18px; bottom: 18px;
      background: rgba(252,252,253,0.92); padding: 10px 14px; border-radius: 12px;
      font-size: 13px; color: var(--blue-deep); font-weight: 600;
    }
    .split {
      display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
    }
    .split img, .media-frame img { width: 100%; height: 100%; object-fit: cover; }
    .media-frame {
      border-radius: 18px; overflow: hidden; min-height: 380px;
      box-shadow: var(--shadow); border: 1px solid var(--line);
    }
    .note {
      margin-top: 16px; padding: 14px 16px; border-left: 3px solid var(--blue);
      background: var(--blue-soft); border-radius: 0 12px 12px 0; color: var(--blue-deep);
      font-size: 15px;
    }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
    .steps::before {
      content: ""; position: absolute; left: 8%; right: 8%; top: 28px;
      height: 2px; background: linear-gradient(90deg, var(--linen), var(--blue-soft), var(--linen));
    }
    .step {
      background: var(--paper); border-radius: var(--radius); padding: 22px 20px 20px;
      border: 1px solid var(--line); box-shadow: var(--shadow); position: relative;
    }
    .step b {
      width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
      background: var(--blue); color: #fff; font-size: 14px; margin-bottom: 14px;
    }
    .step h3 { font-size: 18px; margin-bottom: 8px; }
    .step p { color: var(--muted); font-size: 15px; }
    .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .adv-card, .prod-card, .news-card, .quote-card, .scene-card, .pkg-card {
      background: var(--paper); border: 1px solid var(--line); border-radius: 16px;
      box-shadow: var(--shadow); overflow: hidden; transition: 0.25s ease;
    }
    .adv-card:hover, .prod-card:hover, .news-card:hover, .scene-card:hover, .pkg-card:hover {
      transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: #c5d6e8;
    }
    .adv-card img { width: 100%; height: 168px; object-fit: cover; }
    .adv-card .body, .news-card .body, .prod-card .body, .scene-card .body, .pkg-card .body { padding: 18px 18px 20px; }
    .adv-card h3, .prod-card h3, .news-card h3, .scene-card h3 { font-size: 18px; margin-bottom: 8px; }
    .adv-card p, .news-card p, .scene-card p, .pkg-card p { color: var(--muted); font-size: 15px; }
    .prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .prod-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
    .badge {
      display: inline-flex; min-height: 28px; padding: 0 10px; border-radius: 8px;
      background: var(--walnut-soft); color: var(--walnut); font-size: 12px; font-weight: 600;
    }
    .prod-card .meta { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin: 8px 0 14px; color: var(--muted); font-size: 14px; }
    .scene-strip { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 18px; }
    .scene-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .scene-card img { width: 100%; height: 150px; object-fit: cover; }
    .dark {
      background: #24384d url("/assets/images/8227d39c3d1cbb41.webp") center/cover no-repeat;
      color: #f4f1ea; position: relative;
    }
    .dark::before { content: ""; position: absolute; inset: 0; background: rgba(24, 38, 54, 0.78); }
    .dark .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
    .dark h2, .dark p { color: #f7f4ef; }
    .dark p { color: rgba(247,244,239,0.86); }
    .compare {
      display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
    }
    .compare div {
      background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12);
      border-radius: 14px; padding: 16px;
    }
    .compare strong { display: block; margin-bottom: 6px; }
    .stories { display: grid; gap: 28px; }
    .story { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 28px; align-items: center; background: var(--paper); border-radius: 18px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); }
    .story:nth-child(even) { grid-template-columns: 1.1fr 0.9fr; }
    .story:nth-child(even) .story-media { order: 2; }
    .story-media img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; }
    .story-copy { padding: 28px 28px 28px 8px; }
    .story:nth-child(even) .story-copy { padding: 28px 8px 28px 28px; }
    .story h3 { font-size: 22px; margin: 8px 0 10px; }
    .story p { color: var(--muted); }
    .stats {
      display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px;
      background: linear-gradient(180deg, #eef3f8, #f7f9fc);
      border: 1px solid var(--line); border-radius: 18px; padding: 28px 18px;
    }
    .stat { text-align: center; }
    .stat b { display: block; font-size: 32px; color: var(--blue-deep); font-family: "Noto Serif SC", serif; }
    .stat span { color: var(--muted); font-size: 14px; }
    .quotes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .quote-card { padding: 22px; min-width: 240px; }
    .stars { color: #c9a36a; letter-spacing: 2px; margin-bottom: 10px; }
    .quote-card p { color: var(--muted); min-height: 96px; }
    .quote-card footer { margin-top: 14px; display: flex; justify-content: space-between; font-size: 13px; color: var(--blue-deep); }
    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .news-card img { width: 100%; height: 180px; object-fit: cover; }
    .news-more { margin-top: 22px; }
    .table-wrap { overflow-x: auto; background: var(--paper); border-radius: 16px; border: 1px solid var(--line); box-shadow: var(--shadow); }
    table { width: 100%; border-collapse: collapse; min-width: 720px; }
    th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); font-size: 15px; }
    th { background: #eef3f8; color: var(--blue-deep); font-weight: 600; }
    .pkgs { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 18px; }
    .pkg-card { padding: 0; }
    .pkg-card.featured { border-color: var(--blue-mid); box-shadow: var(--shadow-hover); }
    .pkg-card .body { padding: 24px; }
    .pkg-card h3 { margin: 8px 0 10px; font-size: 22px; }
    .pkg-card ul { margin: 12px 0 20px; }
    .pkg-card li { padding: 6px 0 6px 18px; position: relative; color: var(--muted); }
    .pkg-card li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); position: absolute; left: 0; top: 13px; }
    .guard {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
    }
    .guard-item {
      background: var(--paper); border: 1px dashed #c9d6e4; border-radius: 14px; padding: 18px;
    }
    .guard-item h3 { font-size: 17px; margin-bottom: 6px; }
    .guard-item p { color: var(--muted); font-size: 14px; }
    .faq { background: #fff; border-radius: 16px; border: 1px solid var(--line); overflow: hidden; }
    .faq-item + .faq-item { border-top: 1px solid var(--line); }
    .faq-q {
      width: 100%; text-align: left; min-height: 64px; padding: 16px 20px;
      display: flex; justify-content: space-between; gap: 16px; font-size: 16px; font-weight: 600;
    }
    .faq-q span { color: var(--blue); }
    .faq-a { display: none; padding: 0 20px 18px; color: var(--muted); }
    .faq-item.open .faq-a { display: block; }
    .cta {
      background: linear-gradient(180deg, #eaf1f7, #f6f8fb);
      border-top: 1px solid var(--line);
    }
    .cta-box {
      display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 36px;
      background: var(--paper); border-radius: 20px; padding: 36px;
      border: 1px solid var(--line); box-shadow: var(--shadow);
    }
    form { display: grid; gap: 14px; }
    label { font-size: 14px; font-weight: 600; }
    input, select, textarea {
      width: 100%; min-height: 48px; border-radius: 12px; border: 1px solid #d5dee8;
      background: #f8fafc; padding: 10px 14px; font-size: 16px;
    }
    textarea { min-height: 96px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--blue); background: #fff; }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .form-msg { display: none; padding: 12px 14px; border-radius: 12px; background: #e8f5ee; color: #1e6b45; }
    .site-footer {
      background: #edf2f7; border-top: 1px solid var(--line);
      padding: 48px 0 24px; color: var(--muted);
    }
    .foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 28px; margin-bottom: 28px; }
    .foot-grid h3 { font-size: 16px; margin-bottom: 10px; color: var(--ink); }
    .foot-grid a { display: inline-flex; min-height: 36px; align-items: center; }
    .foot-grid a:hover { color: var(--blue-deep); }
    .copy { border-top: 1px solid var(--line); padding-top: 16px; font-size: 13px; }
    .drawer {
      position: fixed; inset: 0; background: rgba(18, 28, 40, 0.45); z-index: 60;
      display: none;
    }
    .drawer.open { display: block; }
    .drawer-panel {
      position: absolute; right: 0; top: 0; bottom: 0; width: min(360px, 88vw);
      background: #fff; padding: 24px 18px; overflow: auto;
    }
    .drawer-panel a { display: flex; min-height: 48px; align-items: center; border-bottom: 1px solid var(--line); }
    @media (max-width: 1024px) {
      :root { --space: 72px; --header-h: 70px; }
      .nav-bottom, .nav-meta .meta-item:last-child { display: none; }
      .nav-toggle, .phone-icon { display: grid; }
      .nav-top { min-height: 64px; }
      .pain, .split, .dark .container, .cta-box, .scene-strip, .story, .story:nth-child(even) { grid-template-columns: 1fr; }
      .story:nth-child(even) .story-media { order: 0; }
      .steps { grid-template-columns: 1fr 1fr; }
      .steps::before { display: none; }
      .adv-grid, .prod-grid, .news-grid, .quotes, .pkgs { grid-template-columns: 1fr 1fr; }
      .stats, .guard { grid-template-columns: 1fr 1fr; }
      .hero-copy { padding: 56px 0 70px; }
      .quotes { overflow-x: auto; display: flex; padding-bottom: 8px; }
    }
    @media (max-width: 768px) {
      :root { --space: 56px; }
      .container { width: min(1220px, calc(100% - 28px)); }
      .adv-grid, .prod-grid, .news-grid, .pkgs, .scene-grid, .steps, .form-row, .foot-grid, .stats, .guard { grid-template-columns: 1fr; }
      .hero-nav { display: none; }
      .pain-visual { min-height: 240px; }
      .story-copy, .story:nth-child(even) .story-copy { padding: 20px; }
    }
    @media (max-width: 520px) {
      .hero h1 { font-size: 30px; }
      .btn { width: 100%; }
      .hero-actions { width: 100%; }
    }