/* roulang page: index */
:root {
      --c-primary: hsl(216, 42%, 42%);
      --c-primary-deep: hsl(216, 48%, 32%);
      --c-primary-soft: hsl(214, 38%, 94%);
      --c-linen: #f4efe6;
      --c-mist: #eef3f8;
      --c-walnut: #3a2c24;
      --c-walnut-deep: #2b211b;
      --c-bg: #f7f5f1;
      --c-card: #ffffff;
      --c-text: #2d333b;
      --c-muted: #66707a;
      --c-line: #d7e0e8;
      --c-danger: #b45757;
      --c-copper: #b08a62;
      --radius-card: 10px;
      --radius-btn: 6px;
      --shadow: 0 8px 24px rgba(20, 40, 70, .08);
      --shadow-hover: 0 12px 28px rgba(20, 40, 70, .12);
      --space: 24px;
      --max: 1200px;
      --header-h: 108px;
      --bar-h: 64px;
      --serif: "Noto Serif SC", "Source Han Serif SC", serif;
      --sans: "Noto Sans SC", "Source Han Sans SC", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--sans);
      font-size: 16px;
      font-weight: 400;
      line-height: 1.75;
      color: var(--c-text);
      background: var(--c-bg);
      padding-bottom: calc(var(--bar-h) + env(safe-area-inset-bottom));
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--c-primary); text-decoration: none; transition: color .2s ease, background .2s ease, border-color .2s ease; }
    a:hover { color: var(--c-primary-deep); }
    button, input, select, textarea { font-family: inherit; font-size: 16px; }
    button { cursor: pointer; }
    h1, h2, h3, h4 {
      font-family: var(--serif);
      font-weight: 700;
      letter-spacing: -.02em;
      line-height: 1.28;
      color: var(--c-text);
      margin: 0 0 .6em;
    }
    h1 { font-size: clamp(32px, 4.4vw, 52px); }
    h2 { font-size: clamp(26px, 3vw, 36px); }
    h3 { font-size: 20px; }
    p { margin: 0 0 1em; }
    .container { width: min(100% - 40px, var(--max)); margin-inline: auto; }
    .skip {
      position: absolute; left: -999px; top: 8px;
      background: var(--c-primary); color: #fff; padding: 8px 14px; z-index: 100;
    }
    .skip:focus { left: 12px; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 46px; padding: 10px 22px;
      border-radius: var(--radius-btn); border: 1px solid transparent;
      font-weight: 500; line-height: 1; transition: .2s ease;
    }
    .btn-primary { background: var(--c-primary); color: #fff; }
    .btn-primary:hover { background: var(--c-primary-deep); color: #fff; }
    .btn-primary:active { transform: translateY(1px); }
    .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
    .btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
    .btn-line { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
    .btn-line:hover { background: var(--c-primary-soft); color: var(--c-primary-deep); }
    .btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
      outline: 2px solid var(--c-primary-deep);
      outline-offset: 2px;
    }
    .badge {
      display: inline-block; padding: 3px 10px; border-radius: 4px;
      background: var(--c-primary-soft); color: var(--c-primary-deep);
      font-size: 12px; font-weight: 500; letter-spacing: .02em;
    }
    .site-header { position: relative; z-index: 40; }
    .util-bar {
      background: var(--c-mist); color: var(--c-muted);
      font-size: 13px; min-height: 36px;
      display: flex; align-items: center;
    }
    .util-inner {
      display: grid; grid-template-columns: 1fr auto 1fr;
      align-items: center; gap: 12px; width: min(100% - 40px, var(--max)); margin-inline: auto;
    }
    .util-mid { text-align: center; }
    .util-right { text-align: right; }
    .util-bar a { color: var(--c-primary-deep); }
    .dot { margin: 0 8px; color: #b7c3ce; }
    .primary-nav {
      background: #fff; border-bottom: 1px solid var(--c-line);
      transition: box-shadow .2s ease;
    }
    .primary-nav.is-stuck {
      position: sticky; top: 0; z-index: 50;
      box-shadow: 0 6px 18px rgba(20,40,70,.06);
    }
    .nav-inner {
      width: min(100% - 40px, var(--max)); margin-inline: auto;
      min-height: 72px; display: flex; align-items: center; gap: 24px;
    }
    .logo {
      font-family: var(--serif); font-weight: 700; font-size: 22px;
      color: var(--c-text); white-space: nowrap; letter-spacing: -.03em;
    }
    .logo span { color: var(--c-primary); }
    .nav-links { display: flex; gap: 4px 22px; margin-left: auto; align-items: center; }
    .nav-links a {
      color: var(--c-text); font-size: 15px; font-weight: 500;
      padding: 8px 0; position: relative;
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px;
      background: var(--c-primary); transform: scaleX(0); transform-origin: left; transition: .2s ease;
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--c-primary); }
    .nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
    .nav-cta { margin-left: 8px; }
    .menu-toggle {
      display: none; margin-left: auto; width: 44px; height: 44px;
      border: 1px solid var(--c-line); background: #fff; border-radius: 6px;
      position: relative;
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      position: absolute; left: 12px; right: 12px; height: 2px; background: var(--c-text);
      content: "";
    }
    .menu-toggle span { top: 21px; }
    .menu-toggle span::before { top: -7px; }
    .menu-toggle span::after { top: 7px; }
    .drawer {
      display: none; position: fixed; inset: 0; background: rgba(28,36,46,.42); z-index: 80;
    }
    .drawer.open { display: block; }
    .drawer-panel {
      position: absolute; right: 0; top: 0; bottom: 0; width: min(86vw, 360px);
      background: #fff; padding: 28px 22px; box-shadow: var(--shadow-hover);
      display: flex; flex-direction: column; gap: 8px;
    }
    .drawer-panel a {
      min-height: 44px; display: flex; align-items: center;
      color: var(--c-text); font-weight: 500; border-bottom: 1px solid var(--c-line);
    }
    .hero { position: relative; min-height: min(88vh, 760px); overflow: hidden; background: #1c2836; }
    .slides { position: relative; min-height: min(88vh, 760px); }
    .slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden;
      transition: opacity .7s ease, visibility .7s ease;
    }
    .slide.is-on { opacity: 1; visibility: visible; z-index: 1; }
    .slide img {
      width: 100%; height: 100%; object-fit: cover;
      filter: saturate(.92) contrast(1.04);
    }
    .slide-mask {
      position: absolute; inset: 0;
      background: linear-gradient(105deg, rgba(28,36,46,.78) 0%, rgba(28,36,46,.42) 48%, rgba(28,36,46,.18) 100%);
    }
    .slash {
      position: absolute; left: -8%; top: 12%; bottom: 12%; width: 62%;
      background: linear-gradient(135deg, rgba(74,112,158,.88), rgba(42,62,88,.78));
      clip-path: polygon(0 0, 88% 0, 100% 100%, 0 100%);
    }
    .hero-copy {
      position: absolute; z-index: 2; left: 0; right: 0; top: 0; bottom: 0;
      display: flex; align-items: center;
    }
    .hero-copy .container { color: #fff; max-width: 760px; margin-left: max(20px, calc((100vw - var(--max)) / 2)); }
    .brand-mark {
      font-family: var(--serif); font-size: 15px; letter-spacing: .18em;
      color: #e8d7c0; margin-bottom: 14px;
    }
    .hero h1, .hero h2.slide-title {
      color: #fff; font-size: clamp(30px, 4.2vw, 50px); margin-bottom: 16px; max-width: 15em;
    }
    .hero p { color: rgba(255,255,255,.9); max-width: 34em; font-size: 16px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 16px; }
    .trust-line { color: #dce6ef; font-size: 14px; }
    .trust-line a { color: #fff; border-bottom: 1px solid rgba(255,255,255,.45); }
    .hero-ctrl {
      position: absolute; z-index: 3; right: 24px; bottom: 28px; display: flex; gap: 10px; align-items: center;
    }
    .hero-btn {
      width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(255,255,255,.45);
      background: rgba(255,255,255,.12); color: #fff;
    }
    .hero-btn:hover { background: rgba(255,255,255,.24); }
    .dots { display: flex; gap: 8px; }
    .dots button {
      width: 9px; height: 9px; border-radius: 50%; border: 0; background: rgba(255,255,255,.4); padding: 0;
    }
    .dots button.on { background: #fff; width: 22px; border-radius: 8px; }
    main { overflow: hidden; }
    .section { padding: 96px 0; }
    .section-alt { background: #fff; }
    .section-mist { background: var(--c-mist); }
    .section-linen { background: var(--c-linen); }
    .kicker { color: var(--c-primary); font-size: 13px; letter-spacing: .16em; font-weight: 500; margin-bottom: 10px; }
    .lead { color: var(--c-muted); max-width: 46em; }
    .trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .trio-item { padding: 8px 8px 8px 0; border-top: 1px solid var(--c-line); padding-top: 28px; }
    .num {
      font-family: var(--serif); font-size: 42px; color: var(--c-primary); line-height: 1; margin-bottom: 12px;
    }
    .trio-item h3 { margin-bottom: 8px; }
    .result { margin-bottom: 8px; }
    .scope { color: var(--c-muted); font-size: 14px; }
    .split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
    .split.reverse { grid-template-columns: .95fr 1.05fr; }
    .cover-frame { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow); }
    .cover-frame img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
    .check-list { list-style: none; padding: 0; margin: 18px 0 0; }
    .check-list li {
      padding: 10px 0 10px 28px; position: relative; border-bottom: 1px solid var(--c-line);
    }
    .check-list li::before {
      content: ""; position: absolute; left: 0; top: 18px; width: 10px; height: 10px;
      border: 2px solid var(--c-primary); border-radius: 2px;
    }
    .grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .cap-card {
      background: var(--c-card); border: 1px solid var(--c-line); border-radius: var(--radius-card);
      overflow: hidden; box-shadow: var(--shadow); transition: transform .2s ease, box-shadow .2s ease;
    }
    .cap-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
    .cap-card img { width: 100%; height: 168px; object-fit: cover; }
    .cap-card .body { padding: 18px 18px 22px; }
    .cap-card p { color: var(--c-muted); margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
    .scene-track {
      display: grid; grid-auto-flow: column; grid-auto-columns: minmax(280px, 1fr);
      gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px;
    }
    .scene-card {
      scroll-snap-align: start; position: relative; min-height: 360px; border-radius: var(--radius-card); overflow: hidden;
    }
    .scene-card img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
    .scene-card .info {
      position: absolute; left: 0; right: 0; bottom: 0; padding: 22px;
      background: linear-gradient(transparent, rgba(28,36,46,.82)); color: #fff;
    }
    .scene-card h3 { color: #fff; margin-bottom: 6px; }
    .scene-card p { color: rgba(255,255,255,.88); margin: 0 0 10px; font-size: 14px; }
    .scene-card a { color: #fff; border-bottom: 1px solid rgba(255,255,255,.5); min-height: 44px; display: inline-flex; align-items: center; }
    .plan-grid { display: grid; grid-template-columns: 1.2fr .9fr .9fr; gap: 22px; }
    .plan-card {
      background: #fff; border-radius: var(--radius-card); overflow: hidden;
      box-shadow: var(--shadow); display: flex; flex-direction: column; border: 1px solid var(--c-line);
      transition: transform .2s ease, box-shadow .2s ease;
    }
    .plan-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .plan-card img { width: 100%; height: 260px; object-fit: cover; }
    .plan-card.featured img { height: 340px; }
    .plan-card .body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
    .meta { color: var(--c-muted); font-size: 14px; }
    .magazine {
      display: grid; grid-template-columns: 1.4fr 1fr 1fr; grid-template-rows: auto auto; gap: 16px;
    }
    .swatch {
      background: #fff; border-radius: var(--radius-card); overflow: hidden; border: 1px solid var(--c-line);
      box-shadow: var(--shadow); min-height: 180px; position: relative;
    }
    .swatch.wide { grid-row: span 2; min-height: 420px; }
    .swatch img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
    .swatch .label {
      position: absolute; left: 16px; bottom: 16px; right: 16px;
      background: rgba(255,255,255,.92); padding: 12px 14px; border-radius: 8px;
    }
    .swatch h3 { font-size: 18px; margin: 0 0 4px; }
    .swatch p { margin: 0; color: var(--c-muted); font-size: 14px; }
    .dark-band { background: var(--c-walnut); color: #efe7dc; padding: 96px 0; }
    .dark-band h2, .dark-band h3 { color: #f6efe6; }
    .dark-wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
    .dark-wrap img { width: 100%; border-radius: var(--radius-card); object-fit: cover; min-height: 420px; filter: contrast(1.05) saturate(.95); }
    .case-tag { color: var(--c-copper); letter-spacing: .12em; font-size: 13px; margin-bottom: 10px; }
    .compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--c-line); border-radius: 12px; overflow: hidden; background: #fff; }
    .compare-col { padding: 32px 28px; }
    .compare-col.good { background: #fff; }
    .compare-col.plain { background: var(--c-mist); }
    .compare h3 { font-size: 22px; }
    .compare ul { list-style: none; padding: 0; margin: 0; }
    .compare li { padding: 12px 0; border-bottom: 1px solid var(--c-line); }
    .stats {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
      background: var(--c-primary-soft); border-radius: 12px; padding: 36px 20px;
    }
    .stat { text-align: center; }
    .stat b {
      display: block; font-family: var(--serif); font-size: 40px; color: var(--c-primary);
      line-height: 1.1; font-weight: 700;
    }
    .stat span { color: var(--c-muted); font-size: 14px; }
    .story-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 22px; }
    .story-main, .story-side {
      background: #fff; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--c-line);
    }
    .story-main img { width: 100%; height: 320px; object-fit: cover; }
    .story-side { display: grid; grid-template-rows: 1fr 1fr; }
    .mini { display: grid; grid-template-columns: 140px 1fr; min-height: 180px; border-bottom: 1px solid var(--c-line); }
    .mini:last-child { border-bottom: 0; }
    .mini img { width: 140px; height: 100%; object-fit: cover; }
    .story-main .body, .mini .body { padding: 20px 22px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .review {
      background: #fff; border-radius: var(--radius-card); padding: 24px; box-shadow: var(--shadow); border: 1px solid var(--c-line);
    }
    .stars { color: var(--c-copper); letter-spacing: 2px; margin-bottom: 10px; }
    .who { color: var(--c-muted); font-size: 14px; margin-top: 14px; }
    .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .news-card {
      background: #fff; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--c-line);
      display: flex; flex-direction: column;
    }
    .news-card img { width: 100%; height: 150px; object-fit: cover; }
    .news-card .body { padding: 16px 16px 20px; }
    .news-card p { color: var(--c-muted); font-size: 14px; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
    .faq { display: flex; flex-direction: column; gap: 10px; }
    .faq-item { background: #fff; border: 1px solid var(--c-line); border-radius: 10px; overflow: hidden; }
    .faq-item button {
      width: 100%; text-align: left; background: #fff; border: 0; min-height: 56px;
      padding: 16px 48px 16px 20px; font-weight: 500; position: relative;
    }
    .faq-item button::after {
      content: ""; position: absolute; right: 20px; top: 50%; width: 10px; height: 10px;
      border-right: 2px solid var(--c-primary); border-bottom: 2px solid var(--c-primary);
      transform: translateY(-70%) rotate(45deg); transition: .2s ease;
    }
    .faq-item.open button::after { transform: translateY(-20%) rotate(225deg); }
    .faq-item .ans { display: none; padding: 0 20px 18px; color: var(--c-muted); }
    .faq-item.open .ans { display: block; }
    .guard { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .guard-item {
      background: #fff; border: 1px solid var(--c-line); border-radius: 10px; padding: 22px;
    }
    .ico {
      width: 36px; height: 36px; border-radius: 6px; background: var(--c-primary-soft);
      color: var(--c-primary); display: grid; place-items: center; margin-bottom: 12px; font-weight: 600;
    }
    .cta-band { background: linear-gradient(160deg, #355780, #4a709e); color: #fff; padding: 88px 0; }
    .cta-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: start; }
    .cta-band h2 { color: #fff; }
    .form {
      background: #fff; color: var(--c-text); padding: 24px; border-radius: 12px; box-shadow: var(--shadow-hover);
    }
    .form label { display: block; font-size: 14px; margin: 0 0 6px; font-weight: 500; }
    .form .field { margin-bottom: 14px; }
    .form input, .form select, .form textarea {
      width: 100%; border: 1px solid var(--c-line); border-radius: 6px; padding: 11px 12px; background: #fbfcfd;
    }
    .form input:focus, .form select:focus, .form textarea:focus { border-color: var(--c-primary); background: #fff; }
    .form .err { color: var(--c-danger); font-size: 13px; min-height: 18px; }
    .ok-msg { display: none; background: var(--c-primary-soft); color: var(--c-primary-deep); padding: 10px 12px; border-radius: 6px; margin-bottom: 12px; }
    .trust-side { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16); border-radius: 12px; padding: 24px; }
    .trust-side h3 { color: #fff; }
    .trust-side p, .trust-side a { color: rgba(255,255,255,.88); }
    .site-footer { background: var(--c-walnut-deep); color: #d9cfc4; padding: 64px 0 28px; }
    .foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 28px; margin-bottom: 36px; }
    .site-footer h3 { color: #f3ebe1; font-size: 18px; }
    .site-footer a { color: #d9cfc4; }
    .site-footer a:hover { color: #fff; }
    .foot-nav { display: flex; flex-direction: column; gap: 8px; }
    .copy { border-top: 1px solid rgba(255,255,255,.08); padding-top: 18px; font-size: 13px; color: #b6aa9e; }
    .fixbar {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 70;
      background: #fff; border-top: 1px solid var(--c-line);
      box-shadow: 0 -8px 20px rgba(20,40,70,.06);
      padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    }
    .fix-inner {
      width: min(100%, var(--max)); margin-inline: auto;
      display: flex; align-items: center; justify-content: space-between; gap: 12px;
    }
    .fix-phone { font-weight: 600; color: var(--c-text); }
    .m-only { display: none; }
    @media (max-width: 1199px) {
      .nav-links { gap: 4px 14px; }
      .nav-links a { font-size: 14px; }
      .plan-grid, .magazine, .news-grid { grid-template-columns: repeat(2, 1fr); }
      .plan-card.featured { grid-column: span 2; }
      .swatch.wide { grid-row: auto; min-height: 240px; }
    }
    @media (max-width: 991px) {
      .util-inner { grid-template-columns: 1fr auto; }
      .util-mid { display: none; }
      .split, .split.reverse, .dark-wrap, .cta-grid, .story-grid, .compare { grid-template-columns: 1fr; }
      .grid-6, .reviews, .guard, .stats { grid-template-columns: 1fr 1fr; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .cover-frame img, .dark-wrap img { min-height: 280px; }
      .section, .dark-band, .cta-band { padding: 64px 0; }
    }
    @media (max-width: 767px) {
      .util-left { display: none; }
      .util-inner { grid-template-columns: 1fr auto; }
      .nav-links, .nav-cta { display: none; }
      .menu-toggle { display: inline-flex; }
      .trio, .grid-6, .plan-grid, .magazine, .reviews, .news-grid, .guard, .stats, .foot-grid { grid-template-columns: 1fr; }
      .plan-card.featured { grid-column: auto; }
      .hero-copy .container { margin-left: 20px; margin-right: 20px; }
      .slash { width: 92%; clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); opacity: .9; }
      .hero { min-height: 640px; }
      .slides { min-height: 640px; }
      .d-only { display: none !important; }
      .m-only { display: flex; gap: 8px; width: 100%; }
      .m-only .btn { flex: 1; }
      .fix-inner .d-pair { display: none; }
      .mini { grid-template-columns: 1fr; }
      .mini img { width: 100%; height: 160px; }
      .hero-ctrl { right: 12px; bottom: 18px; }
    }
    @media (max-width: 520px) {
      .container, .util-inner, .nav-inner { width: min(100% - 28px, var(--max)); }
      .section, .dark-band, .cta-band { padding: 52px 0; }
      .hero-actions { flex-direction: column; align-items: stretch; }
      .btn { width: 100%; }
      .nav-cta .btn, .fixbar .btn, .m-only .btn { width: auto; }
    }