/* roulang page: index */
:root {
      --c-green: #1e4a32;
      --c-green-deep: #163826;
      --c-green-hover: #173d29;
      --c-green-soft: #2f6a48;
      --c-apricot: #d9b36a;
      --c-apricot-soft: #f0ddb2;
      --c-ochre: #8d4634;
      --c-ochre-hover: #75392a;
      --c-bg: #f6f1e7;
      --c-oat: #efe4d2;
      --c-card: #fbf7f0;
      --c-cream: #f3eadc;
      --c-ink: #2a231c;
      --c-muted: #6a5d51;
      --c-line: #e4d8c4;
      --c-forest: #102117;
      --c-mist: #f8f4ec;
      --radius-card: 18px;
      --radius-btn: 11px;
      --shadow-paper: 0 10px 28px rgba(42, 35, 28, 0.07);
      --shadow-hover: 0 14px 32px rgba(30, 74, 50, 0.12);
      --container: 1180px;
      --nav-h: 72px;
      --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
      --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
      --space-section: 88px;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      color: var(--c-ink);
      background: var(--c-bg);
      background-image:
        radial-gradient(rgba(30, 74, 50, 0.035) 0.6px, transparent 0.6px),
        linear-gradient(180deg, #f8f4ec 0%, #f6f1e7 40%, #f3eadc 100%);
      background-size: 7px 7px, 100% 100%;
      line-height: 1.75;
      font-size: 16px;
      letter-spacing: 0.01em;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, .serif { font-family: var(--font-serif); letter-spacing: 0.04em; line-height: 1.35; }
    :focus-visible { outline: 2px solid var(--c-apricot); outline-offset: 3px; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .site-header { position: relative; z-index: 50; }
    .topbar {
      background: var(--c-green-deep);
      color: #f6f1e7;
      font-size: 13px;
      min-height: 36px;
      display: flex;
      align-items: center;
    }
    .topbar-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; width: min(var(--container), calc(100% - 40px)); margin: 0 auto; padding: 6px 0; }
    .topbar a { color: #f6f1e7; }
    .topbar a:hover { color: var(--c-apricot-soft); }
    .top-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; }
    .trust-chip {
      display: inline-flex; align-items: center; gap: 6px;
      border: 1px solid rgba(240, 221, 178, 0.45);
      border-radius: 8px; padding: 4px 8px; color: var(--c-apricot-soft); min-height: 28px;
    }
    .mainbar {
      background: rgba(251, 247, 240, 0.94);
      border-bottom: 1px solid var(--c-line);
      position: sticky; top: 0; z-index: 60;
      backdrop-filter: saturate(1.1);
    }
    .mainbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: var(--nav-h); }
    .logo { display: flex; align-items: center; gap: 10px; min-height: 44px; }
    .logo-mark {
      width: 36px; height: 36px; border-radius: 10px;
      background: var(--c-green); color: #fbf7f0;
      display: grid; place-items: center;
    }
    .logo-text { font-family: var(--font-serif); font-weight: 700; font-size: 20px; color: var(--c-green); }
    .nav-list { display: flex; align-items: center; gap: 4px 18px; list-style: none; margin: 0; padding: 0; }
    .nav-list a {
      display: inline-flex; align-items: center; min-height: 44px;
      font-size: 15px; color: var(--c-muted); font-weight: 500;
    }
    .nav-list a:hover, .nav-list a.is-active { color: var(--c-green); }
    .btn {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 44px; padding: 0 18px; border-radius: var(--radius-btn);
      font-weight: 600; letter-spacing: 0.02em; transition: 0.2s ease;
      border: 1px solid transparent;
    }
    .btn-primary { background: var(--c-green); color: #fbf7f0; }
    .btn-primary:hover { background: var(--c-green-hover); transform: translateY(-2px); }
    .btn-primary:active { transform: translateY(0); background: var(--c-green-deep); }
    .btn-ghost { background: transparent; color: var(--c-green); border-color: var(--c-green); }
    .btn-ghost:hover { background: rgba(30, 74, 50, 0.07); transform: translateY(-2px); }
    .btn-ochre { background: var(--c-ochre); color: #fbf7f0; }
    .btn-ochre:hover { background: var(--c-ochre-hover); transform: translateY(-2px); }
    .hamburger { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--c-line); align-items: center; justify-content: center; flex-direction: column; gap: 5px; }
    .hamburger span { display: block; width: 18px; height: 2px; background: var(--c-green); }
    .drawer {
      position: fixed; inset: 0; background: rgba(16, 33, 23, 0.42); z-index: 80;
      opacity: 0; pointer-events: none; transition: 0.2s ease;
    }
    .drawer.is-open { opacity: 1; pointer-events: auto; }
    .drawer-panel {
      position: absolute; right: 0; top: 0; bottom: 0; width: min(86vw, 360px);
      background: var(--c-card); padding: 24px 22px; transform: translateX(100%); transition: 0.25s ease;
      display: flex; flex-direction: column; gap: 8px;
    }
    .drawer.is-open .drawer-panel { transform: translateX(0); }
    .drawer a { min-height: 44px; display: flex; align-items: center; color: var(--c-ink); border-bottom: 1px solid var(--c-line); }
    .hero { position: relative; overflow: hidden; }
    .slides { position: relative; min-height: 640px; }
    .slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity 0.6s ease; }
    .slide.is-active { opacity: 1; visibility: visible; position: relative; }
    .slide img.hero-bg { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
    .slide-mask {
      position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(16, 33, 23, 0.78) 0%, rgba(16, 33, 23, 0.42) 46%, rgba(16, 33, 23, 0.18) 100%),
                  linear-gradient(180deg, rgba(16, 33, 23, 0.15) 0%, rgba(16, 33, 23, 0.62) 100%);
    }
    .slide-copy { position: relative; z-index: 2; min-height: 640px; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 32px; align-items: center; padding: 56px 0 72px; color: #f6f1e7; }
    .kicker { display: inline-flex; align-items: center; gap: 8px; color: var(--c-apricot-soft); font-size: 13px; letter-spacing: 0.12em; text-transform: none; }
    .slide h1, .slide .slide-title { font-size: 42px; margin: 10px 0 16px; color: #fbf7f0; max-width: 16em; }
    .slide-lead { max-width: 34em; font-size: 16px; color: #efe6d6; margin-bottom: 24px; }
    .cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-panel {
      background: rgba(251, 247, 240, 0.94); color: var(--c-ink);
      border-radius: 18px; padding: 22px; box-shadow: var(--shadow-paper);
      border: 1px solid rgba(228, 216, 196, 0.9);
    }
    .hero-panel h3 { margin: 0 0 6px; font-size: 18px; }
    .hero-panel p { margin: 0 0 14px; color: var(--c-muted); font-size: 14px; }
    .readout { display: grid; gap: 10px; }
    .readout-row { display: grid; grid-template-columns: 72px 1fr 48px; gap: 8px; align-items: center; font-size: 13px; }
    .bar-track { height: 8px; background: var(--c-oat); border-radius: 99px; overflow: hidden; }
    .bar-fill { height: 100%; border-radius: 99px; background: var(--c-green); }
    .bar-fill.is-warn { background: var(--c-ochre); }
    .hero-controls {
      position: absolute; left: 0; right: 0; bottom: 18px; z-index: 3;
      display: flex; justify-content: center; align-items: center; gap: 10px;
    }
    .ctrl, .dot {
      min-width: 44px; min-height: 44px; border-radius: 10px;
      background: rgba(251, 247, 240, 0.88); color: var(--c-green); display: grid; place-items: center;
    }
    .dots { display: flex; gap: 6px; align-items: center; }
    .dot { min-width: 28px; height: 8px; min-height: 8px; border-radius: 99px; padding: 0; background: rgba(251,247,240,.45); }
    .dot.is-active { width: 36px; background: var(--c-apricot); }
    .section { padding: var(--space-section) 0; }
    .section-title { font-size: 32px; margin: 0 0 12px; color: var(--c-green-deep); }
    .section-lead { margin: 0 0 36px; max-width: 38em; color: var(--c-muted); }
    .metrics { background: var(--c-cream); border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .metric-card {
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: var(--radius-card);
      padding: 22px 20px; box-shadow: var(--shadow-paper);
    }
    .metric-num { font-family: var(--font-serif); font-variant-numeric: tabular-nums; font-size: 40px; color: var(--c-green); line-height: 1; }
    .metric-unit { font-size: 13px; color: var(--c-ochre); margin-left: 4px; }
    .metric-name { margin: 10px 0 6px; font-weight: 600; }
    .metric-note { margin: 0; color: var(--c-muted); font-size: 13px; }
    .intro-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 40px; align-items: center; }
    .intro-figure { border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-paper); border: 1px solid var(--c-line); }
    .intro-figure img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
    .spec-list { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
    .spec-list li { padding: 12px 14px; background: var(--c-oat); border-radius: 12px; border: 1px solid var(--c-line); }
    .matrix { background: #f3eadc; }
    .matrix-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .matrix-card {
      background: var(--c-oat); border: 1px solid #e6d7c0; border-radius: var(--radius-card);
      padding: 22px; min-height: 220px; transition: 0.2s ease;
    }
    .matrix-card:hover { border-color: var(--c-green); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
    .icon-leaf { width: 40px; height: 40px; color: var(--c-green); margin-bottom: 12px; }
    .matrix-card h3 { margin: 0 0 8px; font-size: 20px; }
    .matrix-card p { margin: 0; color: var(--c-muted); font-size: 14px; }
    .product-grid { display: grid; grid-template-columns: 1.35fr 1fr; grid-template-rows: auto auto; gap: 18px; }
    .product-card { background: var(--c-card); border: 1px solid var(--c-line); border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-paper); display: flex; flex-direction: column; }
    .product-card--main { grid-row: 1 / span 2; }
    .product-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
    .product-card--main img { aspect-ratio: 4 / 5; min-height: 280px; }
    .product-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
    .tag { display: inline-flex; width: fit-content; background: var(--c-apricot-soft); color: var(--c-green-deep); border-radius: 8px; padding: 3px 8px; font-size: 12px; }
    .points { margin: 0; padding-left: 18px; color: var(--c-muted); font-size: 14px; }
    .compare { background: var(--c-mist); }
    .compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .compare-col { background: var(--c-card); border: 1px solid var(--c-line); border-radius: var(--radius-card); overflow: hidden; }
    .compare-head { padding: 16px 18px; font-family: var(--font-serif); font-weight: 700; }
    .compare-head.is-plain { background: #efe0cc; color: var(--c-ochre); }
    .compare-head.is-good { background: var(--c-green); color: #fbf7f0; }
    .compare-table { width: 100%; border-collapse: collapse; }
    .compare-table th, .compare-table td { text-align: left; padding: 12px 18px; border-top: 1px solid var(--c-line); font-size: 14px; }
    .mini-bar { height: 8px; border-radius: 99px; background: var(--c-oat); overflow: hidden; margin-top: 6px; }
    .mini-bar > span { display: block; height: 100%; border-radius: 99px; }
    .is-good-bar { background: var(--c-green-soft); }
    .is-need-bar { background: var(--c-ochre); }
    .idea {
      position: relative; color: #f6f1e7; overflow: hidden;
      background: var(--c-forest);
    }
    .idea-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.28; }
    .idea-inner { position: relative; z-index: 1; }
    .idea-quote { font-family: var(--font-serif); font-size: 34px; line-height: 1.4; max-width: 16em; margin: 0 0 28px; }
    .idea-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .idea-point { background: rgba(251, 247, 240, 0.08); border: 1px solid rgba(246, 241, 231, 0.16); border-radius: 16px; padding: 18px; }
    .timeline-track { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; position: relative; }
    .timeline-track::before {
      content: ""; position: absolute; left: 8%; right: 8%; top: 18px; height: 2px; background: var(--c-apricot);
    }
    .timeline-item { position: relative; background: var(--c-card); border: 1px solid var(--c-line); border-radius: 16px; padding: 28px 16px 16px; }
    .dot-node { position: absolute; top: -22px; left: 16px; width: 14px; height: 14px; border-radius: 50%; background: var(--c-green); border: 3px solid var(--c-apricot); }
    .stories { background: #f3eadc; }
    .story-list { display: grid; gap: 18px; }
    .story-card { display: grid; grid-template-columns: 180px 1fr; gap: 20px; background: var(--c-card); border-radius: var(--radius-card); overflow: hidden; border: 1px solid var(--c-line); box-shadow: var(--shadow-paper); }
    .story-card img { width: 100%; height: 100%; min-height: 160px; object-fit: cover; }
    .story-body { padding: 20px 20px 20px 0; }
    .reviews-row { display: grid; grid-template-columns: 1.1fr 0.9fr 1fr; gap: 16px; align-items: start; }
    .review-card { background: var(--c-card); border: 1px solid var(--c-line); border-radius: 18px; padding: 20px; box-shadow: var(--shadow-paper); }
    .review-card:nth-child(2) { margin-top: 28px; }
    .review-card:nth-child(3) { margin-top: 12px; }
    .stars { color: var(--c-apricot); letter-spacing: 2px; margin-bottom: 8px; }
    .news { background: var(--c-cream); }
    .news-layout { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 22px; }
    .news-feature { position: relative; border-radius: 18px; overflow: hidden; min-height: 340px; }
    .news-feature img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
    .news-feature-copy { position: absolute; inset: auto 0 0; padding: 22px; background: linear-gradient(180deg, transparent, rgba(16,33,23,.86)); color: #f6f1e7; }
    .news-list { display: grid; gap: 0; background: var(--c-card); border-radius: 18px; border: 1px solid var(--c-line); overflow: hidden; }
    .news-item { display: block; padding: 16px 18px; border-bottom: 1px solid var(--c-line); }
    .news-item:last-child { border-bottom: 0; }
    .news-item:hover { background: var(--c-oat); }
    .news-item h3 { margin: 0 0 6px; font-size: 17px; }
    .news-item p { margin: 0; color: var(--c-muted); font-size: 14px; }
    .assure-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .assure-item { background: var(--c-card); border: 1px solid var(--c-line); border-radius: 16px; padding: 18px; }
    .quick { background: #f3eadc; }
    .chips { display: flex; flex-wrap: wrap; gap: 10px; }
    .chip {
      display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px;
      border-radius: 12px; border: 1px solid var(--c-line); background: var(--c-card); color: var(--c-green-deep); font-weight: 500;
    }
    .chip:hover { border-color: var(--c-green); transform: translateY(-1px); }
    .faq-list { border-top: 1px solid var(--c-line); }
    .faq-item { border-bottom: 1px solid var(--c-line); }
    .faq-btn { width: 100%; text-align: left; min-height: 56px; padding: 14px 8px; display: flex; justify-content: space-between; gap: 12px; font-size: 17px; font-weight: 600; color: var(--c-ink); }
    .faq-btn span.plus { color: var(--c-green); font-size: 22px; }
    .faq-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.28s ease; }
    .faq-item.is-open .faq-panel { grid-template-rows: 1fr; }
    .faq-panel > div { overflow: hidden; }
    .faq-panel p { margin: 0 8px 16px; color: var(--c-muted); max-width: 42em; }
    .consult { background: var(--c-cream); }
    .consult-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 28px; align-items: start; }
    .form-card { background: var(--c-card); border: 1px solid var(--c-line); border-radius: 18px; padding: 22px; box-shadow: var(--shadow-paper); }
    .field { margin-bottom: 14px; }
    .field label { display: block; margin-bottom: 6px; font-weight: 600; }
    .field input, .field select, .field textarea {
      width: 100%; min-height: 44px; border: 1px solid var(--c-line); border-radius: 10px;
      background: #fffdf8; padding: 10px 12px; color: var(--c-ink);
    }
    .field textarea { min-height: 110px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--c-green); }
    .error { color: var(--c-ochre); font-size: 13px; margin-top: 4px; }
    .success { background: #e7f0e4; color: var(--c-green-deep); padding: 12px 14px; border-radius: 10px; margin-bottom: 14px; }
    .check { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; color: var(--c-muted); }
    .form-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 8px; }
    .close-band { background: var(--c-forest); color: #efe6d6; font-size: 13px; padding: 10px 0; }
    .site-footer { background: #0c1b13; color: #d9cbb8; padding: 56px 0 24px; }
    .footer-grid { display: grid; grid-template-columns: 1.3fr 0.8fr 1fr 1fr; gap: 24px; }
    .site-footer h3 { color: #f6f1e7; margin: 0 0 12px; font-size: 18px; }
    .site-footer a { color: #d9cbb8; display: inline-flex; min-height: 32px; }
    .site-footer a:hover { color: var(--c-apricot-soft); }
    .copy { border-top: 1px solid rgba(217, 203, 184, 0.18); margin-top: 28px; padding-top: 16px; font-size: 13px; }
    .leaf-line { width: 42px; height: 18px; color: var(--c-green); }
    @media (max-width: 1280px) {
      .container { width: min(1080px, calc(100% - 40px)); }
      .slide h1, .slide .slide-title { font-size: 38px; }
    }
    @media (max-width: 1024px) {
      .nav-list { display: none; }
      .header-cta { display: none; }
      .hamburger { display: inline-flex; }
      .slide-copy { grid-template-columns: 1fr; min-height: 720px; padding-top: 36px; }
      .hero-panel { max-width: 420px; }
      .metric-grid, .assure-grid { grid-template-columns: 1fr 1fr; }
      .matrix-grid { grid-template-columns: 1fr 1fr; }
      .product-grid, .intro-grid, .compare-grid, .news-layout, .consult-grid, .idea-points, .footer-grid { grid-template-columns: 1fr 1fr; }
      .product-card--main { grid-row: auto; }
      .product-card--main img { aspect-ratio: 4 / 3; }
      .timeline-track { grid-template-columns: 1fr; }
      .timeline-track::before { left: 22px; right: auto; top: 12px; bottom: 12px; width: 2px; height: auto; }
      .reviews-row { grid-template-columns: 1fr; }
      .review-card:nth-child(2), .review-card:nth-child(3) { margin-top: 0; }
      .story-card { grid-template-columns: 140px 1fr; }
    }
    @media (max-width: 768px) {
      :root { --space-section: 64px; }
      .top-meta span.hide-sm { display: none; }
      .slides, .slide-copy { min-height: 0; }
      .slide-copy { padding: 280px 0 92px; gap: 18px; }
      .slide img.hero-bg { min-height: 520px; }
      .slide h1, .slide .slide-title { font-size: 30px; }
      .section-title { font-size: 26px; }
      .idea-quote { font-size: 26px; }
      .intro-grid, .compare-grid, .news-layout, .consult-grid, .product-grid, .footer-grid, .idea-points { grid-template-columns: 1fr; }
      .story-card { grid-template-columns: 1fr; }
      .story-body { padding: 0 16px 16px; }
      .matrix-grid { grid-template-columns: 1fr 1fr; }
      .hero-panel { max-width: none; }
    }
    @media (max-width: 375px) {
      .container { width: calc(100% - 28px); }
      .matrix-grid, .metric-grid, .assure-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
      .slide h1, .slide .slide-title { font-size: 26px; }
      .btn { padding: 0 12px; }
      body { overflow-x: hidden; }
    }