/* roulang page: index */
:root {
      --c-primary: #1E6B5A;
      --c-primary-dark: #18574A;
      --c-primary-deep: #13463B;
      --c-accent: #E07A2F;
      --c-accent-dark: #C86A26;
      --c-ink: #17221F;
      --c-bg: #F3F0E8;
      --c-fog: #E7EEEA;
      --c-data: #2F9B8A;
      --c-line: #D7D2C6;
      --c-text: #24302C;
      --c-muted: #5C6863;
      --c-card: #FFFdf8;
      --c-white: #FFFdf8;
      --radius: 10px;
      --radius-md: 8px;
      --radius-sm: 6px;
      --radius-btn: 5px;
      --shadow: 0 8px 24px rgba(23, 34, 31, .08);
      --shadow-hover: 0 10px 28px rgba(23, 34, 31, .12);
      --container: 1220px;
      --header-h: 104px;
      --space: 88px;
      --focus: 2px solid #1E6B5A;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--c-text);
      background: var(--c-bg);
      font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.8;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--c-primary); text-decoration: none; transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease; }
    a:hover { color: var(--c-primary-dark); }
    button, input, select, textarea { font-family: inherit; font-size: 16px; }
    button { cursor: pointer; }
    h1, h2, h3, h4 { margin: 0; color: var(--c-ink); font-weight: 700; line-height: 1.28; }
    p { margin: 0 0 .9em; }
    p:last-child { margin-bottom: 0; }
    ul { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: var(--focus); outline-offset: 2px; }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .skip { position: absolute; left: -999px; }
    .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

    .site-header {
      position: sticky; top: 0; z-index: 80;
      background: #FFFdf8;
      border-bottom: 1px solid var(--c-line);
      box-shadow: 0 4px 16px rgba(23, 34, 31, .04);
    }
    .nav-top, .nav-bottom { display: flex; align-items: center; }
    .nav-top {
      justify-content: space-between;
      min-height: 56px;
      gap: 16px;
      border-bottom: 1px solid #eee8dc;
    }
    .brand {
      display: flex; align-items: center; gap: 10px; color: var(--c-ink); min-height: 44px;
    }
    .brand:hover { color: var(--c-primary); }
    .brand-mark {
      width: 36px; height: 36px; border-radius: 8px;
      background: var(--c-primary); color: #fff;
      display: grid; place-items: center; flex-shrink: 0;
    }
    .brand-name { font-size: 18px; font-weight: 700; letter-spacing: .02em; line-height: 1.2; }
    .brand-sub { display: block; font-size: 12px; color: var(--c-muted); font-weight: 500; margin-top: 2px; }
    .tool-area { display: flex; align-items: center; gap: 14px; }
    .tel-block { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.2; }
    .tel-block a { color: var(--c-ink); font-weight: 700; font-size: 16px; min-height: 24px; }
    .tel-block a:hover { color: var(--c-primary); }
    .hours { font-size: 12px; color: var(--c-muted); background: var(--c-fog); border: 1px solid #d5e3de; border-radius: 999px; padding: 4px 8px; }
    .nav-bottom { min-height: 48px; gap: 8px; justify-content: space-between; }
    .nav-links { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
    .nav-links a {
      position: relative; color: var(--c-text); font-size: 14px; font-weight: 600;
      padding: 10px 12px; min-height: 44px; display: inline-flex; align-items: center;
    }
    .nav-links a:hover { color: var(--c-primary); }
    .nav-links a.is-active { color: var(--c-primary-dark); }
    .nav-links a.is-active::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 6px; height: 2px; background: var(--c-accent);
    }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 6px;
      min-height: 44px; padding: 0 18px; border-radius: var(--radius-btn);
      border: 1px solid transparent; font-weight: 650; letter-spacing: .02em; line-height: 1;
      transition: background .2s ease, border-color .2s ease, transform .2s ease, color .2s ease;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(0); }
    .btn-primary { background: var(--c-primary); color: #fff; }
    .btn-primary:hover { background: var(--c-primary-dark); color: #fff; }
    .btn-accent { background: var(--c-accent); color: #fff; }
    .btn-accent:hover { background: var(--c-accent-dark); color: #fff; }
    .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
    .btn-ghost:hover { background: rgba(255,255,255,.1); color: #fff; }
    .btn-line { background: #fff; color: var(--c-primary); border-color: #b7d2ca; }
    .btn-line:hover { border-color: var(--c-primary); color: var(--c-primary-dark); }
    .menu-btn {
      display: none; width: 44px; height: 44px; border: 1px solid var(--c-line);
      background: #fff; border-radius: 6px; padding: 10px;
    }
    .menu-btn span { display: block; height: 2px; background: var(--c-ink); margin: 5px 0; }
    .drawer {
      display: none; position: fixed; inset: var(--header-h) 0 0 auto; width: min(86vw, 360px);
      background: #FFFdf8; border-left: 1px solid var(--c-line); box-shadow: var(--shadow);
      padding: 16px; z-index: 90; overflow: auto;
    }
    .drawer.is-open { display: flex; flex-direction: column; gap: 6px; }
    .drawer a {
      min-height: 44px; display: flex; align-items: center; padding: 8px 12px;
      color: var(--c-text); font-weight: 600; border-radius: 6px;
    }
    .drawer a:hover, .drawer a:active { background: var(--c-fog); color: var(--c-primary); }
    .drawer .btn { width: 100%; margin-top: 12px; }

    .hero { position: relative; min-height: 640px; color: #fff; isolation: isolate; overflow: hidden; }
    .slides { position: absolute; inset: 0; z-index: -2; }
    .slide { position: absolute; inset: 0; opacity: 0; transition: opacity .7s ease; }
    .slide.is-on { opacity: 1; }
    .slide img { width: 100%; height: 100%; object-fit: cover; }
    .hero-mask {
      position: absolute; inset: 0; z-index: -1;
      background: linear-gradient(180deg, rgba(23,34,31,.72) 0%, rgba(23,34,31,.58) 46%, rgba(23,34,31,.78) 100%);
    }
    .hero-inner { padding: 36px 0 48px; }
    .plan-row { display: grid; grid-template-columns: 1.15fr .9fr .9fr; gap: 12px; margin-bottom: 28px; }
    .plan {
      background: rgba(255,253,248,.94); color: var(--c-text); border: 1px solid #d7d2c6;
      border-radius: 10px; padding: 16px 16px 14px; min-height: 176px;
      display: flex; flex-direction: column; gap: 8px;
      box-shadow: var(--shadow);
    }
    .plan-rec { border: 2px solid var(--c-accent); background: #fffdf8; transform: translateY(-4px); }
    .badge {
      display: inline-flex; align-items: center; min-height: 24px; padding: 0 8px;
      border-radius: 999px; font-size: 12px; font-weight: 700;
    }
    .badge-accent { background: var(--c-accent); color: #fff; }
    .badge-ink { background: var(--c-fog); color: var(--c-primary-dark); }
    .badge-on { background: #e4f3ef; color: var(--c-primary); }
    .badge-way { background: #f8eadc; color: #b45b1c; }
    .badge-bill { background: #eeebe3; color: #3d4743; }
    .plan h3 { font-size: 18px; }
    .plan p { font-size: 14px; line-height: 1.65; color: var(--c-muted); }
    .plan .btn { align-self: flex-start; margin-top: auto; }
    .hero-copy { max-width: 820px; }
    .hero-kicker { color: #f0e2cf; font-size: 13px; font-weight: 700; letter-spacing: .12em; margin-bottom: 10px; }
    .hero h1 { color: #fff; font-size: 40px; margin-bottom: 14px; }
    .hero .lead { font-size: 16px; line-height: 1.8; color: #f3f0e8; margin-bottom: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
    .slot-bar {
      display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px;
      background: rgba(23,34,31,.42); border: 1px solid rgba(224,122,47,.45);
      border-radius: 8px; padding: 10px 14px; max-width: 720px;
    }
    .slot-bar strong { color: #ffd2a8; }
    .hero-ctrl {
      position: absolute; inset: auto 20px 20px auto; display: flex; align-items: center; gap: 8px;
    }
    .hero-ctrl button {
      width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.4);
      background: rgba(23,34,31,.45); color: #fff; border-radius: 6px;
    }
    .hero-ctrl button:hover { background: rgba(23,34,31,.7); }
    .dots { display: flex; gap: 6px; }
    .dots button {
      width: 28px; height: 44px; background: transparent; border: 0; padding: 0;
      display: grid; place-items: center;
    }
    .dots button i {
      display: block; width: 22px; height: 3px; border-radius: 2px; background: rgba(255,255,255,.4);
    }
    .dots button.is-on i { background: var(--c-accent); }

    main section { padding: var(--space) 0; }
    .sec-head { margin-bottom: 28px; max-width: 760px; }
    .sec-head h2 { font-size: 28px; margin-bottom: 12px; }
    .sec-head p { color: var(--c-muted); }
    .sec-fog { background: var(--c-fog); }
    .sec-paper { background: var(--c-bg); }
    .sec-card { background: #f7f4ee; }
    .sec-dark { background: var(--c-ink); color: #e7eeea; }
    .sec-dark h2, .sec-dark h3 { color: #fff; }
    .sec-dark p, .sec-dark li { color: #c9d4cf; }

    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .metric {
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: 6px;
      padding: 16px; box-shadow: var(--shadow); min-height: 148px;
    }
    .metric:hover { transform: translateY(-3px); border-color: #c3dcd5; }
    .metric .k { font-size: 13px; color: var(--c-muted); font-weight: 600; }
    .metric .v { font-size: 34px; font-weight: 750; color: var(--c-data); line-height: 1.1; margin: 8px 0 4px; }
    .metric .v small { font-size: 14px; color: var(--c-muted); margin-left: 4px; font-weight: 600; }
    .metric .d { font-size: 13px; color: var(--c-text); line-height: 1.55; }
    .trend { height: 6px; background: #e6ebe8; border-radius: 99px; margin-top: 12px; overflow: hidden; }
    .trend > span { display: block; height: 100%; background: var(--c-primary); border-radius: 99px; }

    .split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 36px; align-items: center; }
    .cover {
      border-radius: 12px; overflow: hidden; border: 1px solid var(--c-line); box-shadow: var(--shadow); position: relative;
    }
    .cover img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
    .stamp {
      position: absolute; left: 12px; bottom: 12px; background: rgba(23,34,31,.78); color: #fff;
      font-size: 12px; padding: 6px 10px; border-radius: 4px;
    }
    .check-list { display: grid; gap: 10px; margin-top: 16px; }
    .check-list li {
      padding-left: 28px; position: relative; color: var(--c-text);
    }
    .check-list li::before {
      content: ""; position: absolute; left: 0; top: 8px; width: 16px; height: 16px; border-radius: 4px;
      background: var(--c-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23fff' stroke-width='2' d='M3 8.2l3.2 3.1L13 4.7'/%3E%3C/svg%3E") center/12px no-repeat;
    }
    .note {
      margin-top: 16px; padding: 12px 14px; background: #e7eeea; border-left: 3px solid var(--c-primary);
      border-radius: 0 8px 8px 0; font-size: 14px; color: var(--c-text);
    }

    .matrix { display: grid; grid-template-columns: 1.3fr 1.3fr 1fr 1fr; grid-template-rows: auto auto; gap: 12px; }
    .tile {
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: 10px;
      padding: 20px; box-shadow: var(--shadow); min-height: 210px;
      display: flex; flex-direction: column; gap: 8px; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    .tile:hover { transform: translateY(-3px); border-color: #b9d4cc; box-shadow: var(--shadow-hover); }
    .tile-lg { grid-column: span 2; min-height: 230px; }
    .ico { width: 36px; height: 36px; color: var(--c-primary); }
    .tile h3 { font-size: 20px; }
    .tile p { color: var(--c-muted); font-size: 14px; }
    .tiny { display: grid; gap: 6px; margin-top: auto; font-size: 14px; }
    .tiny li { padding-left: 14px; position: relative; }
    .tiny li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--c-accent); position: absolute; left: 0; top: 9px; }

    .mods { display: grid; gap: 16px; }
    .mod {
      display: grid; grid-template-columns: 280px 1fr auto; gap: 20px; align-items: center;
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: 12px; padding: 12px;
      box-shadow: var(--shadow); transition: transform .2s ease, border-color .2s ease;
    }
    .mod:hover { transform: translateY(-3px); border-color: #c3dcd5; }
    .mod img { width: 100%; height: 168px; object-fit: cover; border-radius: 8px; }
    .mod h3 { font-size: 22px; margin-bottom: 8px; }
    .mod p { color: var(--c-muted); }

    .compare-wrap { overflow-x: auto; }
    .compare {
      width: 100%; border-collapse: separate; border-spacing: 0; min-width: 680px;
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: 10px; overflow: hidden;
    }
    .compare th, .compare td { padding: 14px 16px; text-align: left; vertical-align: top; font-size: 15px; line-height: 1.65; }
    .compare th { background: var(--c-ink); color: #fff; font-weight: 700; }
    .compare tr:nth-child(even) td { background: #f6f3ec; }
    .compare td:nth-child(2) { color: #9a5a1f; }
    .compare td:nth-child(3) { color: var(--c-primary-dark); font-weight: 600; }
    .cap { font-size: 12px; color: var(--c-muted); font-weight: 400; display: block; margin-top: 4px; }

    .case-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 16px; }
    .case-main, .case-side {
      border: 1px solid rgba(215,210,198,.25); border-radius: 12px; padding: 22px;
      background: rgba(255,253,248,.04); position: relative; overflow: hidden;
    }
    .case-main::after {
      content: ""; position: absolute; right: -20px; top: 40px; width: 180px; height: 180px;
      border: 2px dashed rgba(224,122,47,.35); border-radius: 50%; pointer-events: none;
    }
    .case-main h3 { font-size: 22px; margin: 8px 0 10px; }
    .side-list { display: grid; gap: 12px; }
    .case-side { padding: 16px; }
    .route { height: 0; border-top: 1px dashed rgba(224,122,47,.45); margin: 14px 0; }

    .scenes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .scene {
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: 12px; overflow: hidden;
      box-shadow: var(--shadow); display: flex; flex-direction: column;
    }
    .scene:hover { transform: translateY(-3px); border-color: #c3dcd5; }
    .scene img { height: 180px; width: 100%; object-fit: cover; }
    .scene .body { padding: 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
    .scene h3 { font-size: 18px; }
    .scene p { color: var(--c-muted); font-size: 14px; }

    .axis { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
    .axis::before {
      content: ""; position: absolute; left: 8%; right: 8%; top: 18px; height: 2px; background: #cfe0db;
    }
    .node { padding: 0 8px; }
    .dot {
      width: 16px; height: 16px; border-radius: 50%; background: var(--c-primary); border: 3px solid #fff;
      box-shadow: 0 0 0 2px var(--c-primary); margin-bottom: 12px; position: relative; z-index: 1;
    }
    .node h3 { font-size: 16px; margin-bottom: 6px; }
    .node p { font-size: 14px; color: var(--c-muted); }

    .stories { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .story, .quote, .news, .qa, .guard {
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: 10px; padding: 18px;
      box-shadow: var(--shadow);
    }
    .story:hover, .quote:hover, .news:hover { transform: translateY(-3px); border-color: #c3dcd5; }
    .role { font-size: 13px; color: var(--c-primary); font-weight: 700; }
    .story h3, .quote h3, .news h3 { font-size: 18px; margin: 6px 0 8px; }
    .quotes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .stars { color: var(--c-accent); letter-spacing: 2px; font-size: 13px; }
    .meta { font-size: 13px; color: var(--c-muted); margin-top: 10px; }

    .news-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 14px; }
    .news time { font-size: 13px; color: var(--c-muted); }
    .news p { color: var(--c-muted); font-size: 14px; margin: 8px 0 12px; }
    .more { display: inline-flex; min-height: 44px; align-items: center; font-weight: 700; color: var(--c-primary); }

    .guards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .guard h3 { font-size: 18px; margin-bottom: 8px; }
    .guard p { color: var(--c-muted); font-size: 14px; }

    .qas { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .qa dt { font-weight: 700; margin-bottom: 6px; }
    .qa dd { margin: 0; color: var(--c-muted); font-size: 14px; }

    .faq-list { display: grid; gap: 8px; }
    .faq-item { background: var(--c-card); border: 1px solid var(--c-line); border-radius: 8px; overflow: hidden; }
    .faq-item button {
      width: 100%; text-align: left; background: #fffdf8; border: 0; min-height: 52px;
      padding: 12px 16px; font-weight: 700; color: var(--c-ink); display: flex; justify-content: space-between; gap: 12px;
    }
    .faq-item button:hover { background: var(--c-fog); }
    .faq-item .a { display: none; padding: 0 16px 16px; color: var(--c-muted); line-height: 1.8; }
    .faq-item.is-open .a { display: block; }
    .faq-item .mark { color: var(--c-accent); font-weight: 700; }

    .convert { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; align-items: start; }
    .points { display: grid; gap: 10px; margin: 16px 0; }
    .points li { background: #fff; border: 1px solid var(--c-line); border-radius: 8px; padding: 12px 14px; }
    .form {
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: 12px; padding: 22px;
      box-shadow: var(--shadow);
    }
    .field { margin-bottom: 14px; }
    .field label { display: block; font-weight: 700; margin-bottom: 6px; }
    .field input, .field select, .field textarea {
      width: 100%; min-height: 44px; border: 1px solid var(--c-line); border-radius: 6px;
      background: #fff; padding: 8px 12px; color: var(--c-text);
    }
    .field textarea { min-height: 88px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--c-primary); outline: var(--focus); }
    .field.is-err input, .field.is-err select { border-color: var(--c-accent); }
    .err { display: none; color: var(--c-accent-dark); font-size: 13px; margin-top: 4px; }
    .field.is-err .err { display: block; }
    .form-note { font-size: 13px; color: var(--c-muted); margin-top: 10px; }
    .success {
      display: none; background: #e7eeea; border: 1px solid #b7d2ca; border-radius: 10px; padding: 18px;
    }
    .success.is-on { display: block; }
    .form.is-hide { display: none; }

    .site-footer { background: var(--c-ink); color: #c9d4cf; padding: 56px 0 24px; }
    .foot-grid { display: grid; grid-template-columns: 1.2fr 1fr 1.1fr 1fr; gap: 24px; margin-bottom: 28px; }
    .site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
    .site-footer a { color: #c9d4cf; display: inline-flex; min-height: 36px; align-items: center; }
    .site-footer a:hover { color: #fff; }
    .copy { border-top: 1px solid rgba(215,210,198,.18); padding-top: 16px; font-size: 13px; color: #9aa7a2; display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: space-between; }
    .m-cta {
      display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 70;
      background: #FFFdf8; border-top: 1px solid var(--c-line); padding: 8px 12px 10px;
    }
    .m-cta .btn { width: 100%; }

    @media (max-width: 1280px) {
      .hero h1 { font-size: 36px; }
      .matrix { grid-template-columns: 1fr 1fr 1fr 1fr; }
      .quotes { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 1024px) {
      :root { --space: 72px; --header-h: 104px; }
      .plan-row { grid-template-columns: 1fr 1fr 1fr; }
      .metrics, .guards { grid-template-columns: repeat(2, 1fr); }
      .split, .case-grid, .convert, .news-grid { grid-template-columns: 1fr; }
      .mod { grid-template-columns: 220px 1fr; }
      .mod .btn { grid-column: 2; justify-self: start; }
      .matrix { grid-template-columns: 1fr 1fr; }
      .tile-lg { grid-column: span 1; }
      .scenes, .stories { grid-template-columns: 1fr 1fr; }
      .axis { grid-template-columns: 1fr 1fr; gap: 18px 12px; }
      .axis::before { display: none; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      :root { --space: 52px; --header-h: 56px; }
      .nav-bottom, .nav-links, .btn-desk { display: none; }
      .menu-btn { display: inline-block; }
      .tool-area .hours { display: none; }
      .hero { min-height: 0; }
      .hero-inner { padding: 24px 0 88px; }
      .hero h1 { font-size: 28px; }
      .plan-row { grid-template-columns: 1fr; }
      .plan-rec { transform: none; }
      .metrics, .scenes, .stories, .qas, .guards { grid-template-columns: 1fr 1fr; }
      .mod { grid-template-columns: 1fr; }
      .mod img { height: 200px; }
      .mod .btn { grid-column: 1; }
      .axis { grid-template-columns: 1fr; }
      .node { display: grid; grid-template-columns: 16px 1fr; gap: 10px; border-left: 2px solid #cfe0db; padding: 0 0 18px 12px; }
      .dot { margin: 4px 0 0; }
      .m-cta { display: block; }
      body { padding-bottom: 64px; }
      .foot-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
      .container { width: min(100% - 28px, var(--container)); }
      .hero h1 { font-size: 24px; }
      .sec-head h2 { font-size: 22px; }
      .metrics, .scenes, .stories, .qas, .guards, .quotes { grid-template-columns: 1fr; }
      .metric .v { font-size: 30px; }
      .hero-ctrl { right: 12px; bottom: 72px; }
    }