/* roulang page: index */
:root {
      --bg: #F3EFE6;
      --bg-2: #EBE6DA;
      --ink: #16181C;
      --steel: #5C6570;
      --panel: #1C2228;
      --panel-2: #14181D;
      --amber: #C98402;
      --amber-deep: #A86E02;
      --teal: #1F7A72;
      --teal-2: #165E58;
      --line: #D4CFC4;
      --line-2: #C4BDB0;
      --ok: #2F6B4F;
      --danger: #8A3B32;
      --paper: #FAF7F0;
      --white: #F7F4EC;
      --shadow: 0 6px 0 rgba(22, 24, 28, .06);
      --shadow-hard: 0 8px 0 rgba(22, 24, 28, .12);
      --radius: 6px;
      --gutter: 28px;
      --container: 1240px;
      --nav-h: 64px;
      --top-h: 36px;
      --focus: 2px solid #1F7A72;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: 76px;
      -webkit-text-size-adjust: 100%;
    }
    body {
      margin: 0;
      font-family: "Noto Sans SC", "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
      color: var(--ink);
      background:
        radial-gradient(rgba(22, 24, 28, .035) 1px, transparent 1px) 0 0 / 22px 22px,
        var(--bg);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--teal); text-decoration: none; transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease; }
    a:hover { color: var(--amber-deep); }
    button, input, select, textarea {
      font-family: inherit;
      font-size: 16px;
    }
    button { cursor: pointer; }
    h1, h2, h3, h4 { font-weight: 700; line-height: 1.28; margin: 0 0 .6em; letter-spacing: .01em; }
    p { margin: 0 0 1em; }
    ul, ol { margin: 0; padding: 0; }
    :focus-visible { outline: var(--focus); outline-offset: 2px; }
    .skip-link {
      position: absolute; left: 12px; top: -48px; z-index: 80;
      background: var(--amber); color: var(--ink); padding: 8px 14px;
    }
    .skip-link:focus { top: 8px; }
    .container {
      width: min(100% - 48px, var(--container));
      margin: 0 auto;
    }
    .kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--teal); font-size: 13px; font-weight: 600; letter-spacing: .08em;
      margin-bottom: 10px;
    }
    .kicker::before {
      content: ""; width: 18px; height: 2px; background: var(--amber);
    }
    .lead {
      color: var(--steel); font-size: 15.5px; max-width: 46em; margin-bottom: 0;
    }
    .section-head { margin-bottom: 32px; max-width: 46em; }
    .section-head h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 12px; }
    .topbar {
      background: #12151A; color: #C8CDD3; font-size: 12.5px;
      min-height: var(--top-h);
    }
    .topbar-inner {
      width: min(100% - 48px, var(--container));
      margin: 0 auto; min-height: var(--top-h);
      display: flex; justify-content: space-between; align-items: center; gap: 16px;
    }
    .topbar a { color: #E7E2D6; }
    .topbar a:hover { color: var(--amber); }
    .topbar-left, .topbar-right { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; }
    .topbar-item { white-space: nowrap; }
    .topbar-item + .topbar-item { position: relative; }
    .nav-row {
      background: var(--paper);
      border-bottom: 1px solid var(--line);
      position: sticky; top: 0; z-index: 50;
      min-height: var(--nav-h);
    }
    .nav-row.is-stuck { box-shadow: 0 6px 0 rgba(22, 24, 28, .06); }
    .nav-inner {
      width: min(100% - 48px, var(--container));
      margin: 0 auto; min-height: var(--nav-h);
      display: flex; align-items: center; gap: 20px;
    }
    .logo {
      display: flex; align-items: center; gap: 10px; color: var(--ink); flex: 0 0 auto;
    }
    .logo:hover { color: var(--ink); }
    .logo-mark {
      width: 28px; height: 28px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 3px; align-items: end;
    }
    .logo-mark span {
      display: block; background: var(--ink); width: 100%;
    }
    .logo-mark span:nth-child(1) { height: 10px; background: var(--teal); }
    .logo-mark span:nth-child(2) { height: 16px; }
    .logo-mark span:nth-child(3) { height: 22px; background: var(--amber); }
    .logo-mark span:nth-child(4) { height: 28px; }
    .logo-text { font-weight: 700; font-size: 16px; letter-spacing: .02em; white-space: nowrap; }
    .nav-panel {
      display: flex; align-items: center; justify-content: space-between; gap: 18px; flex: 1;
    }
    .nav-links {
      display: flex; align-items: center; list-style: none; margin: 0 auto; padding: 0;
    }
    .nav-links a {
      color: var(--ink); font-size: 14px; font-weight: 500; padding: 10px 0;
      border-bottom: 2px solid transparent; display: inline-flex; min-height: 44px; align-items: center;
    }
    .nav-links li { display: flex; align-items: center; }
    .nav-links li + li::before {
      content: ""; width: 14px; height: 1px; background: var(--line-2); margin: 0 11px;
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--ink); border-bottom-color: var(--amber); }
    .nav-toggle {
      display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: var(--paper); color: var(--ink);
      border-radius: 4px; margin-left: auto; position: relative;
    }
    .nav-toggle span, .nav-toggle::before, .nav-toggle::after {
      content: ""; position: absolute; left: 12px; right: 12px; height: 2px; background: var(--ink);
    }
    .nav-toggle span { top: 21px; }
    .nav-toggle::before { top: 14px; }
    .nav-toggle::after { bottom: 14px; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 18px; border-radius: 4px; font-weight: 600; font-size: 14px;
      border: 1px solid transparent; transition: .18s ease; letter-spacing: .02em;
    }
    .btn-primary { background: var(--amber); color: var(--ink); box-shadow: var(--shadow); }
    .btn-primary:hover { background: var(--amber-deep); color: var(--ink); transform: translateY(-1px); }
    .btn-primary:active { transform: translateY(0); }
    .btn-ghost { background: transparent; color: var(--white); border-color: #8A9097; }
    .btn-ghost:hover { border-color: var(--amber); color: var(--amber); }
    .btn-line { background: transparent; color: var(--ink); border-color: var(--steel); }
    .btn-line:hover { border-color: var(--amber); color: var(--amber-deep); transform: translateY(-1px); }
    .hero {
      position: relative; min-height: min(86vh, 760px); color: var(--white); overflow: hidden;
      background: var(--panel);
    }
    .hero-slides { position: relative; min-height: min(86vh, 760px); }
    .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; position: relative; }
    .hero-media {
      position: absolute; inset: 0;
    }
    .hero-media img {
      width: 100%; height: 100%; object-fit: cover; filter: saturate(.86) contrast(1.05);
    }
    .hero-overlay {
      position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(16, 18, 22, .86) 0%, rgba(16, 18, 22, .55) 48%, rgba(16, 18, 22, .28) 100%),
        linear-gradient(180deg, rgba(16, 18, 22, .18), rgba(16, 18, 22, .5));
    }
    .hero-grid {
      position: relative; z-index: 2;
      width: min(100% - 48px, var(--container));
      margin: 0 auto; min-height: min(86vh, 760px);
      display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, .72fr);
      gap: 36px; align-items: center; padding: 54px 0 88px;
    }
    .hero-kicker {
      display: inline-flex; align-items: center; gap: 10px;
      font-size: 13px; letter-spacing: .14em; color: var(--amber); font-weight: 600; margin-bottom: 14px;
    }
    .hero-title {
      font-size: clamp(28px, 4.1vw, 44px); font-weight: 700; margin: 0 0 16px; max-width: 14em;
    }
    .hero-lead {
      font-size: 15.5px; color: #D8D3C8; max-width: 42em; margin-bottom: 26px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-side {
      justify-self: end; width: min(100%, 320px);
      background: rgba(20, 24, 29, .72);
      border: 1px solid rgba(255,255,255,.08);
      box-shadow: inset 0 0 0 1px rgba(201, 132, 2, .18);
      padding: 14px 14px 10px;
    }
    .hero-side img {
      width: 100%; height: 390px; object-fit: cover; border: 1px solid rgba(255,255,255,.08);
    }
    .station-list { list-style: none; margin-top: 10px; }
    .station-list li {
      display: grid; grid-template-columns: 52px 1fr auto; gap: 8px;
      font-size: 12.5px; color: #C9C4B8; padding: 7px 2px; border-bottom: 1px dashed rgba(255,255,255,.08);
      font-variant-numeric: tabular-nums;
    }
    .station-list li.is-live { color: var(--amber); }
    .station-list b { font-weight: 600; color: inherit; }
    .hero-controls {
      position: absolute; left: 0; right: 0; bottom: 22px; z-index: 3;
      width: min(100% - 48px, var(--container)); margin: 0 auto;
      display: flex; align-items: center; gap: 12px;
    }
    .hero-btn, .hero-pause {
      width: 44px; height: 44px; border: 1px solid #8A9097; background: rgba(20,24,29,.55); color: var(--white);
      border-radius: 4px;
    }
    .hero-btn:hover, .hero-pause:hover { border-color: var(--amber); color: var(--amber); }
    .hero-dots { display: flex; gap: 8px; margin-left: 6px; }
    .hero-dots button {
      width: 22px; height: 4px; padding: 0; border: 0; background: #6B7178; border-radius: 1px;
    }
    .hero-dots button.is-active { background: var(--amber); }
    .hero-takt {
      margin-left: auto; display: flex; gap: 18px; font-size: 12px; color: #D0CBBF;
      font-variant-numeric: tabular-nums;
    }
    .hero-takt strong { color: var(--amber); font-size: 16px; display: block; }
    main { display: block; }
    section { padding: 88px 0; position: relative; }
    .section-alt { background: linear-gradient(180deg, #EFEBE1, var(--bg)); }
    .section-paper { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .section-dark {
      background:
        repeating-linear-gradient(135deg, rgba(255,255,255,.015) 0 12px, transparent 12px 24px),
        var(--panel);
      color: var(--white);
    }
    .section-dark .lead { color: #C2BDB3; }
    .section-dark h2, .section-dark h3 { color: var(--white); }
    .safety-stripe {
      height: 8px;
      background: repeating-linear-gradient(-45deg, var(--amber) 0 8px, #16181C 8px 16px);
    }
    .split {
      display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center;
    }
    .split-media {
      position: relative; border: 1px solid var(--line); box-shadow: var(--shadow-hard); border-radius: var(--radius); overflow: hidden;
    }
    .split-media img { width: 100%; height: 460px; object-fit: cover; }
    .spec-bar {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line);
      border: 1px solid var(--line); margin-top: 18px;
    }
    .spec-bar div {
      background: var(--paper); padding: 12px 14px; font-size: 13px; color: var(--steel);
    }
    .spec-bar strong { display: block; color: var(--ink); font-size: 15px; font-variant-numeric: tabular-nums; }
    .check-list { list-style: none; margin-top: 18px; display: grid; gap: 10px; }
    .check-list li {
      padding-left: 22px; position: relative; color: var(--steel); font-size: 15px;
    }
    .check-list li::before {
      content: ""; position: absolute; left: 0; top: 9px; width: 10px; height: 10px;
      border: 2px solid var(--teal); transform: rotate(45deg); border-left: 0; border-top: 0;
    }
    .matrix {
      display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 24px; align-items: stretch;
    }
    .matrix-list { list-style: none; border: 1px solid var(--line); background: var(--paper); }
    .matrix-item {
      width: 100%; text-align: left; background: transparent; border: 0; border-bottom: 1px solid var(--line);
      padding: 16px 18px; min-height: 58px; color: var(--ink); display: flex; justify-content: space-between; align-items: center; gap: 12px;
    }
    .matrix-item small { color: var(--steel); font-variant-numeric: tabular-nums; }
    .matrix-item:hover, .matrix-item.is-active { background: #1C2228; color: var(--white); }
    .matrix-item.is-active small { color: var(--amber); }
    .matrix-item.is-active { box-shadow: inset 3px 0 0 var(--amber); }
    .matrix-panel {
      border: 1px solid var(--line); background: var(--paper); min-height: 420px;
      display: none; grid-template-columns: .9fr 1.1fr;
    }
    .matrix-panel.is-active { display: grid; }
    .matrix-panel img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
    .matrix-copy { padding: 28px; }
    .matrix-copy h3 { font-size: 24px; }
    .chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 16px; }
    .chip {
      display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px;
      border: 1px solid var(--line); background: var(--bg); font-size: 12px; color: var(--ink); border-radius: 4px;
      font-variant-numeric: tabular-nums;
    }
    .chip-ok { background: #E4EFE8; border-color: #B7D0C2; color: var(--ok); }
    .adv-grid {
      display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px;
    }
    .adv-card {
      grid-column: span 4; background: var(--paper); border: 1px solid var(--line);
      box-shadow: var(--shadow); border-radius: var(--radius); padding: 22px 22px 20px;
      min-height: 210px; transition: transform .18s ease, box-shadow .18s ease;
    }
    .adv-card:nth-child(2), .adv-card:nth-child(5) { transform: translateY(16px); }
    .adv-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hard); }
    .adv-card:nth-child(2):hover, .adv-card:nth-child(5):hover { transform: translateY(12px); }
    .adv-icon {
      width: 42px; height: 42px; border: 1px solid var(--line); display: grid; place-items: center; margin-bottom: 14px;
      color: var(--teal); font-weight: 700; font-variant-numeric: tabular-nums; font-size: 13px;
    }
    .adv-metric { color: var(--amber-deep); font-size: 13px; font-weight: 600; margin-bottom: 6px; font-variant-numeric: tabular-nums; }
    .adv-card p { color: var(--steel); font-size: 14.5px; margin: 0; }
    .stats {
      display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: #2A323A;
      border: 1px solid #2A323A;
    }
    .stat {
      background: var(--panel-2); padding: 28px 18px; text-align: left;
    }
    .stat-num {
      font-size: 32px; font-weight: 700; color: var(--amber); font-variant-numeric: tabular-nums; line-height: 1.1;
    }
    .stat-unit { font-size: 13px; color: #C9C4B8; margin: 6px 0 8px; }
    .stat-label { font-size: 13px; color: #9AA1A8; }
    .product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .product-card {
      background: var(--paper); border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: var(--radius); overflow: hidden;
      display: flex; flex-direction: column;
    }
    .product-cover { position: relative; }
    .product-cover img { width: 100%; height: 230px; object-fit: cover; }
    .product-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .product-body h3 { font-size: 20px; margin: 0; }
    .product-body p { color: var(--steel); font-size: 14.5px; margin: 0; }
    .product-body .btn { margin-top: auto; align-self: flex-start; }
    .timeline {
      display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; position: relative;
    }
    .timeline::before {
      content: ""; position: absolute; left: 0; right: 0; top: 21px; height: 2px; background: var(--line);
    }
    .step { position: relative; padding: 0 12px 0 0; }
    .step-idx {
      width: 42px; height: 42px; border-radius: 4px; background: var(--ink); color: var(--white);
      display: grid; place-items: center; font-weight: 700; font-size: 13px; position: relative; z-index: 1;
      font-variant-numeric: tabular-nums;
    }
    .step h3 { font-size: 16px; margin: 14px 0 8px; }
    .step p { color: var(--steel); font-size: 13.5px; margin: 0; }
    .scene-grid {
      display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px;
    }
    .scene-tile {
      grid-column: span 3; min-height: 170px; padding: 18px; color: var(--white);
      background-size: cover; background-position: center; position: relative; overflow: hidden;
      border: 1px solid #2A323A; display: flex; flex-direction: column; justify-content: flex-end;
    }
    .scene-tile::before {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(16,18,22,.15), rgba(16,18,22,.82));
    }
    .scene-tile > * { position: relative; z-index: 1; }
    .scene-tile h3 { font-size: 18px; margin: 0 0 6px; }
    .scene-tile p { margin: 0; color: #D5D0C5; font-size: 13.5px; }
    .scene-tile:nth-child(1), .scene-tile:nth-child(6) { grid-column: span 6; min-height: 210px; }
    .case-layout {
      display: grid; grid-template-columns: 1.35fr .75fr; gap: 28px;
    }
    .case-wall {
      display: grid; grid-template-columns: 1.4fr 1fr 1fr; grid-template-rows: 230px 230px; gap: 10px;
    }
    .case-item {
      position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.08); cursor: pointer; padding: 0; background: #111;
      color: inherit; text-align: left;
    }
    .case-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
    .case-item:hover img { transform: scale(1.04); }
    .case-item:first-child { grid-row: 1 / span 2; }
    .case-cap {
      position: absolute; left: 0; right: 0; bottom: 0; padding: 12px 14px;
      background: linear-gradient(180deg, transparent, rgba(10,12,14,.88));
      font-size: 14px;
    }
    .case-abstract {
      display: none; margin-top: 12px; padding: 14px; border: 1px solid rgba(255,255,255,.1);
      color: #D8D3C8; font-size: 14px; background: rgba(0,0,0,.2);
    }
    .case-item.is-open .case-abstract { display: block; position: absolute; left: 8px; right: 8px; bottom: 8px; }
    .principle { list-style: none; display: grid; gap: 12px; }
    .principle li {
      border: 1px solid rgba(255,255,255,.1); padding: 14px 16px; background: rgba(255,255,255,.03);
    }
    .principle strong { display: block; color: var(--amber); margin-bottom: 4px; font-size: 14px; }
    .principle span { color: #C9C4B8; font-size: 13.5px; }
    .story-list { display: grid; gap: 22px; }
    .story-card {
      display: grid; grid-template-columns: 1.15fr .85fr; gap: 0; border: 1px solid var(--line); background: var(--paper);
      box-shadow: var(--shadow); border-radius: var(--radius); overflow: hidden;
    }
    .story-card:nth-child(even) { grid-template-columns: .85fr 1.15fr; }
    .story-card:nth-child(even) .story-body { order: 2; }
    .story-card img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; }
    .story-body { padding: 26px; }
    .story-meta { font-size: 13px; color: var(--teal); font-weight: 600; margin-bottom: 8px; }
    .compare {
      display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px;
    }
    .compare div { border: 1px solid var(--line); padding: 10px 12px; font-size: 13px; color: var(--steel); }
    .compare strong { display: block; color: var(--ink); font-variant-numeric: tabular-nums; }
    .quote { margin: 12px 0 0; padding-left: 14px; border-left: 2px solid var(--amber); color: var(--ink); font-size: 14.5px; }
    .review-track {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
    }
    .review-card {
      background: var(--paper); border: 1px solid var(--line); padding: 18px; min-height: 210px;
      box-shadow: var(--shadow); border-radius: var(--radius);
    }
    .stars { color: var(--amber); letter-spacing: 2px; font-size: 13px; margin-bottom: 8px; }
    .review-card p { color: var(--steel); font-size: 14.5px; }
    .review-role { font-size: 13px; color: var(--ink); font-weight: 600; }
    .qc-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 36px; align-items: center; }
    .qc-list { list-style: none; display: grid; gap: 10px; margin-top: 16px; }
    .qc-list li {
      display: grid; grid-template-columns: 88px 1fr; gap: 12px; padding: 12px 14px;
      border: 1px solid var(--line); background: var(--paper);
    }
    .qc-list b { color: var(--teal); font-size: 13px; }
    .news-list { display: grid; grid-template-columns: 1.2fr 1fr; gap: 16px; }
    .news-card {
      display: grid; grid-template-columns: 160px 1fr; gap: 16px; padding: 12px;
      border: 1px solid var(--line); background: var(--paper); align-items: center;
    }
    .news-card:first-child {
      grid-row: span 2; grid-template-columns: 1fr; align-items: stretch;
    }
    .news-card:first-child img { width: 100%; height: 240px; object-fit: cover; }
    .news-card img { width: 160px; height: 110px; object-fit: cover; }
    .news-date { font-size: 12px; color: var(--steel); font-variant-numeric: tabular-nums; }
    .news-card h3 { font-size: 17px; margin: 4px 0 8px; }
    .news-card p { margin: 0; color: var(--steel); font-size: 14px; }
    .news-more { margin-top: 16px; }
    .partner-wall {
      display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px;
    }
    .partner-item {
      min-height: 76px; display: grid; place-items: center; border: 1px solid var(--line);
      background: #E4E0D6; color: #8A8478; font-weight: 700; letter-spacing: .08em; font-size: 14px;
      filter: grayscale(1); transition: .2s ease;
    }
    .partner-item:hover { filter: none; color: var(--ink); border-color: var(--amber); background: var(--paper); }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); background: transparent; }
    .faq-q {
      width: 100%; background: none; border: 0; text-align: left; padding: 18px 40px 18px 0;
      min-height: 56px; font-weight: 600; color: var(--ink); position: relative;
    }
    .faq-q::after {
      content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
      color: var(--amber); font-size: 20px;
    }
    .faq-item.is-open .faq-q::after { content: "–"; }
    .faq-a { display: none; color: var(--steel); padding: 0 8px 18px 0; font-size: 15px; }
    .faq-item.is-open .faq-a { display: block; }
    .guarantee {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line); background: var(--paper);
    }
    .guarantee-item {
      padding: 22px 20px; border-right: 1px solid var(--line);
    }
    .guarantee-item:last-child { border-right: 0; }
    .guarantee-item h3 { font-size: 16px; margin-bottom: 6px; }
    .guarantee-item p { margin: 0; color: var(--steel); font-size: 14px; }
    .g-ico {
      width: 28px; height: 28px; border: 1px solid var(--line); display: grid; place-items: center;
      margin-bottom: 10px; font-size: 12px; color: var(--teal); font-weight: 700;
    }
    .contact-wrap {
      background:
        linear-gradient(90deg, rgba(16,18,22,.88), rgba(16,18,22,.62)),
        url("/assets/images/dec25c1cd0ff9231.jpg") center/cover no-repeat;
      color: var(--white);
    }
    .contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; align-items: start; }
    .contact-side h2 { font-size: clamp(24px, 3vw, 34px); }
    .contact-side p { color: #D5D0C5; }
    .contact-dl { margin: 18px 0 0; display: grid; gap: 8px; font-size: 15px; }
    .contact-dl a { color: var(--amber); }
    .form {
      background: var(--paper); color: var(--ink); padding: 22px; border: 1px solid var(--line);
      box-shadow: var(--shadow-hard);
    }
    .form h3 { margin-bottom: 14px; font-size: 18px; }
    .fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 600; }
    .field input, .field select, .field textarea {
      min-height: 44px; border: 1px solid var(--line); background: #FFFdf8; color: var(--ink);
      padding: 8px 12px; border-radius: 4px; width: 100%;
    }
    .field textarea { min-height: 96px; resize: vertical; }
    .field.is-error input, .field.is-error select, .field.is-error textarea { border-color: var(--danger); }
    .field .err { display: none; color: var(--danger); font-size: 12px; }
    .field.is-error .err { display: block; }
    .form .btn { width: 100%; margin-top: 8px; }
    .form-success {
      display: none; padding: 28px 8px; text-align: left;
    }
    .form.is-success .fields, .form.is-success .btn, .form.is-success h3 { display: none; }
    .form.is-success .form-success { display: block; }
    .form-success strong { display: block; font-size: 18px; margin-bottom: 8px; }
    footer {
      background: var(--panel-2); color: #A8AEB5; padding: 48px 0 24px; font-size: 14px;
    }
    .footer-grid {
      display: grid; grid-template-columns: 1.2fr 1fr 1fr 1.1fr; gap: 28px; margin-bottom: 28px;
    }
    footer h3 { color: var(--white); font-size: 15px; margin-bottom: 12px; }
    footer a { color: #C9C4B8; }
    footer a:hover { color: var(--amber); }
    .foot-links { list-style: none; display: grid; gap: 8px; }
    .copyright {
      border-top: 1px solid #2A323A; padding-top: 16px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
      font-size: 13px;
    }
    body.menu-open { overflow: hidden; }
    @media (max-width: 1280px) {
      .adv-card { grid-column: span 4; }
      .hero-takt { display: none; }
    }
    @media (max-width: 1024px) {
      .container, .topbar-inner, .nav-inner, .hero-grid, .hero-controls { width: min(100% - 32px, var(--container)); }
      .nav-links li + li::before { margin: 0 7px; width: 10px; }
      .nav-links a { font-size: 13px; }
      .hero-grid, .split, .matrix, .case-layout, .qc-grid, .contact-grid { grid-template-columns: 1fr; }
      .hero-side { width: 100%; justify-self: stretch; }
      .hero-side img { height: 240px; }
      .matrix-panel, .matrix-panel.is-active { grid-template-columns: 1fr; }
      .matrix-panel img { min-height: 220px; height: 220px; }
      .stats { grid-template-columns: repeat(3, 1fr); }
      .product-grid, .review-track { grid-template-columns: 1fr 1fr; }
      .timeline { grid-template-columns: 1fr 1fr 1fr; gap: 22px 12px; }
      .timeline::before { display: none; }
      .scene-tile, .scene-tile:nth-child(1), .scene-tile:nth-child(6) { grid-column: span 6; }
      .case-wall { grid-template-columns: 1fr 1fr; grid-template-rows: 220px 180px 180px; }
      .case-item:first-child { grid-column: 1 / -1; }
      .story-card, .story-card:nth-child(even) { grid-template-columns: 1fr; }
      .story-card:nth-child(even) .story-body { order: 0; }
      .news-list { grid-template-columns: 1fr; }
      .partner-wall { grid-template-columns: repeat(3, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .adv-card:nth-child(2), .adv-card:nth-child(5) { transform: none; }
    }
    @media (max-width: 768px) {
      :root { --nav-h: 58px; }
      section { padding: 56px 0; }
      .topbar { font-size: 12px; }
      .topbar-right { display: none; }
      .logo-text { font-size: 14.5px; }
      .nav-toggle { display: inline-block; }
      .nav-panel {
        position: fixed; inset: 0 0 0 auto; width: min(86vw, 360px);
        background: var(--paper); border-left: 1px solid var(--line);
        transform: translateX(110%); transition: transform .24s ease;
        flex-direction: column; justify-content: flex-start; align-items: stretch;
        padding: 72px 22px 24px; box-shadow: -12px 0 0 rgba(22,24,28,.08);
      }
      body.menu-open .nav-panel { transform: translateX(0); }
      .nav-links { flex-direction: column; align-items: stretch; margin: 0; }
      .nav-links li + li::before { display: none; }
      .nav-links a { min-height: 48px; border-bottom: 1px solid var(--line); width: 100%; }
      .nav-cta { width: 100%; margin-top: 12px; }
      .hero { min-height: 0; }
      .hero-slides, .hero-slide.is-active, .hero-grid { min-height: 0; }
      .hero-grid { padding: 36px 0 86px; }
      .hero-side { display: none; }
      .split-media img { height: 240px; }
      .spec-bar { grid-template-columns: 1fr 1fr; }
      .matrix { grid-template-columns: 1fr; }
      .adv-grid { grid-template-columns: 1fr; }
      .adv-card { grid-column: auto; }
      .stats { grid-template-columns: 1fr 1fr; }
      .product-grid, .review-track { grid-template-columns: 1fr; }
      .timeline { grid-template-columns: 1fr; }
      .scene-tile, .scene-tile:nth-child(1), .scene-tile:nth-child(6) { grid-column: span 12; }
      .case-wall { grid-template-columns: 1fr; grid-template-rows: none; }
      .case-item, .case-item:first-child { height: 210px; }
      .guarantee { grid-template-columns: 1fr; }
      .guarantee-item { border-right: 0; border-bottom: 1px solid var(--line); }
      .fields { grid-template-columns: 1fr; }
      .partner-wall { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .news-card, .news-card:first-child { grid-template-columns: 1fr; }
      .news-card img, .news-card:first-child img { width: 100%; height: 180px; }
    }
    @media (max-width: 520px) {
      .container, .topbar-inner, .nav-inner, .hero-grid, .hero-controls { width: min(100% - 24px, var(--container)); }
      .hero-title { font-size: 26px; }
      .hero-actions { flex-direction: column; align-items: stretch; }
      .btn { width: 100%; }
      .nav-cta.btn { width: 100%; }
      .stats { grid-template-columns: 1fr; }
      .spec-bar { grid-template-columns: 1fr; }
      .copyright { flex-direction: column; }
      .hero-takt { display: none; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
    }

/* roulang page: index */
:root {
      --bg: #F3EFE6;
      --bg-2: #E8E2D4;
      --paper: #F7F3EA;
      --ink: #16181C;
      --steel: #5C6570;
      --muted: #7A828C;
      --panel: #1C2228;
      --panel-2: #14191E;
      --amber: #C98402;
      --amber-deep: #A36B02;
      --amber-ink: #16181C;
      --teal: #1F7A72;
      --line: #D4CFC4;
      --line-strong: #B7B1A4;
      --ok: #2F6B4F;
      --danger: #8A3B32;
      --white: #F8F5EE;
      --shadow: 0 6px 0 rgba(22, 24, 28, .07);
      --shadow-hard: 0 8px 0 rgba(22, 24, 28, .12);
      --radius: 6px;
      --radius-sm: 4px;
      --nav-h: 62px;
      --top-h: 38px;
      --container: 1240px;
      --gutter: 28px;
      --font: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      --mono: "DIN Alternate", "Tabular nums", "PingFang SC", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      font-family: var(--font);
      color: var(--ink);
      background: var(--bg);
      line-height: 1.7;
      font-size: 16px;
      letter-spacing: .01em;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--teal); text-decoration: none; transition: color .2s ease, opacity .2s ease; }
    a:hover { color: var(--amber-deep); }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; }
    h1, h2, h3, h4 { margin: 0; line-height: 1.28; letter-spacing: .02em; font-weight: 700; }
    p { margin: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible {
      outline: 2px solid var(--teal);
      outline-offset: 3px;
    }
    .skip {
      position: absolute;
      left: -999px;
      top: 8px;
      background: var(--amber);
      color: var(--ink);
      padding: 8px 12px;
      z-index: 100;
    }
    .skip:focus { left: 8px; }
    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }
    .num, .stat-value, .chip, .spec-k { font-variant-numeric: tabular-nums; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 80;
      background: var(--paper);
      border-bottom: 1px solid var(--line);
    }
    .topbar {
      height: var(--top-h);
      background: #12161A;
      color: #C9C4B8;
      font-size: 12px;
      display: flex;
      align-items: center;
    }
    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .topbar-left, .topbar-right {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }
    .topbar a { color: #E7E2D6; }
    .topbar a:hover { color: var(--amber); }
    .topbar .sep { width: 8px; height: 1px; background: #4A525A; display: inline-block; }
    .trust-dot {
      color: #9BE0C0;
      margin-right: 4px;
    }
    .nav-row {
      height: var(--nav-h);
      display: flex;
      align-items: center;
      background: var(--paper);
      transition: height .2s ease;
    }
    .site-header.is-compact .topbar { display: none; }
    .site-header.is-compact .nav-row { height: 54px; }
    .nav-inner {
      display: grid;
      grid-template-columns: auto 1fr auto;
      align-items: center;
      gap: 18px;
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--ink);
      min-height: 44px;
    }
    .logo:hover { color: var(--ink); opacity: .86; }
    .logo-mark {
      width: 34px;
      height: 34px;
      flex: 0 0 34px;
      background: var(--panel);
      color: var(--amber);
      display: grid;
      place-items: center;
      border-radius: 4px;
    }
    .logo-text {
      display: flex;
      flex-direction: column;
      line-height: 1.1;
    }
    .logo-text strong {
      font-size: 15px;
      font-weight: 700;
    }
    .logo-text span {
      font-size: 11px;
      color: var(--steel);
      margin-top: 3px;
    }
    .nav-links {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      position: relative;
      color: var(--ink);
      font-size: 14px;
      padding: 10px 11px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
    }
    .nav-links a + a::before {
      content: "";
      position: absolute;
      left: -1px;
      top: 50%;
      width: 10px;
      height: 1px;
      background: var(--line-strong);
      transform: translateY(-50%);
    }
    .nav-links a.is-active,
    .nav-links a:hover {
      color: var(--ink);
    }
    .nav-links a.is-active::after,
    .nav-links a:hover::after {
      content: "";
      position: absolute;
      left: 11px;
      right: 11px;
      bottom: 6px;
      height: 2px;
      background: var(--amber);
    }
    .nav-cta, .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 18px;
      border: 1px solid transparent;
      border-radius: 4px;
      font-size: 14px;
      font-weight: 700;
      letter-spacing: .04em;
      transition: transform .15s ease, background .15s ease, box-shadow .15s ease, color .15s ease, border-color .15s ease;
    }
    .btn-primary, .nav-cta {
      background: var(--amber);
      color: var(--amber-ink);
      box-shadow: var(--shadow);
    }
    .btn-primary:hover, .nav-cta:hover {
      background: var(--amber-deep);
      color: var(--amber-ink);
      transform: translateY(-1px);
    }
    .btn-primary:active, .nav-cta:active { transform: translateY(0); }
    .btn-ghost {
      background: transparent;
      color: var(--white);
      border-color: rgba(248, 245, 238, .45);
    }
    .btn-ghost:hover {
      border-color: var(--amber);
      color: var(--amber);
    }
    .btn-line {
      background: transparent;
      color: var(--ink);
      border-color: var(--line-strong);
    }
    .btn-line:hover {
      border-color: var(--ink);
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      background: var(--paper);
      border-radius: 4px;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }
    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      background: var(--ink);
    }
    .hero {
      position: relative;
      min-height: min(88vh, 760px);
      background: var(--panel);
      color: var(--white);
      overflow: hidden;
    }
    .slides { position: relative; min-height: min(88vh, 760px); }
    .slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      visibility: hidden;
      transition: opacity .55s ease, visibility .55s ease;
    }
    .slide.is-active {
      opacity: 1;
      visibility: visible;
      z-index: 1;
    }
    .slide img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: saturate(.86) contrast(1.05);
    }
    .slide::after {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(12, 15, 18, .88) 0%, rgba(12, 15, 18, .62) 42%, rgba(12, 15, 18, .18) 100%),
        linear-gradient(180deg, rgba(12, 15, 18, .18) 0%, rgba(12, 15, 18, .55) 100%);
    }
    .hero-copy {
      position: relative;
      z-index: 2;
      height: 100%;
      display: flex;
      align-items: center;
      padding: 72px 0 96px;
    }
    .brand-kicker {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 12px;
      letter-spacing: .16em;
      color: var(--amber);
      margin-bottom: 16px;
      text-transform: none;
    }
    .brand-kicker i {
      width: 28px;
      height: 1px;
      background: var(--amber);
      display: inline-block;
    }
    .hero h1, .hero-heading {
      font-size: clamp(30px, 4vw, 46px);
      max-width: 16em;
      margin-bottom: 18px;
      font-weight: 700;
    }
    .hero-lead {
      max-width: 38em;
      font-size: 15px;
      color: #E4DFD4;
      margin-bottom: 22px;
    }
    .hero-sub {
      max-width: 34em;
      color: #C9C4B8;
      margin-bottom: 28px;
      font-size: 15px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .takt-bar {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      z-index: 3;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      background: rgba(16, 19, 23, .86);
      border-top: 1px solid rgba(201, 132, 2, .35);
    }
    .takt-bar div {
      padding: 14px 18px;
      border-right: 1px solid rgba(212, 207, 196, .12);
    }
    .takt-bar span {
      display: block;
      font-size: 11px;
      color: #9AA1A8;
      margin-bottom: 4px;
    }
    .takt-bar strong {
      font-size: 16px;
      color: #F3EFE6;
      font-variant-numeric: tabular-nums;
    }
    .hero-controls {
      position: absolute;
      right: 28px;
      bottom: 92px;
      z-index: 4;
      display: flex;
      gap: 8px;
      align-items: center;
    }
    .hero-btn, .hero-pause {
      width: 44px;
      height: 44px;
      border: 1px solid rgba(248, 245, 238, .3);
      background: rgba(20, 24, 28, .55);
      color: var(--white);
      border-radius: 4px;
    }
    .hero-btn:hover, .hero-pause:hover { border-color: var(--amber); color: var(--amber); }
    .hero-dots {
      position: absolute;
      left: 50%;
      bottom: 92px;
      transform: translateX(-50%);
      z-index: 4;
      display: flex;
      gap: 8px;
    }
    .hero-dots button {
      width: 28px;
      height: 8px;
      min-height: 8px;
      padding: 0;
      border: 0;
      background: rgba(248, 245, 238, .35);
      border-radius: 1px;
    }
    .hero-dots button.is-on { background: var(--amber); }
    main section {
      padding: 88px 0;
      position: relative;
    }
    .sec-head {
      margin-bottom: 36px;
      max-width: 46em;
    }
    .sec-head h2 {
      font-size: clamp(24px, 3vw, 34px);
      margin-bottom: 14px;
    }
    .sec-head p {
      color: var(--steel);
      font-size: 15px;
      max-width: 42em;
    }
    .eyebrow {
      display: inline-block;
      font-size: 12px;
      color: var(--teal);
      letter-spacing: .12em;
      margin-bottom: 10px;
    }
    .paper-grid {
      background-color: var(--bg);
      background-image: radial-gradient(rgba(22, 24, 28, .055) 1px, transparent 1px);
      background-size: 18px 18px;
    }
    .alt-bg { background: var(--bg-2); }
    .split {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 40px;
      align-items: center;
    }
    .media-frame {
      position: relative;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-hard);
    }
    .media-frame img { width: 100%; height: 100%; object-fit: cover; min-height: 360px; }
    .spec-strip {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1px;
      background: var(--line);
      border: 1px solid var(--line);
      margin-top: 18px;
    }
    .spec-strip li {
      background: var(--paper);
      padding: 14px 16px;
    }
    .spec-strip small { display: block; color: var(--steel); font-size: 12px; }
    .spec-strip b { font-size: 15px; }
    .check-list { margin-top: 18px; display: grid; gap: 10px; }
    .check-list li {
      display: grid;
      grid-template-columns: 16px 1fr;
      gap: 10px;
      font-size: 14px;
      color: var(--ink);
    }
    .check-list li::before {
      content: "";
      width: 10px;
      height: 10px;
      margin-top: 7px;
      background: var(--teal);
      transform: rotate(45deg);
    }
    .matrix {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 24px;
      min-height: 420px;
    }
    .matrix-list {
      border: 1px solid var(--line);
      background: var(--paper);
    }
    .matrix-list button {
      width: 100%;
      text-align: left;
      background: transparent;
      border: 0;
      border-bottom: 1px solid var(--line);
      padding: 16px 18px;
      min-height: 64px;
      color: var(--ink);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
    }
    .matrix-list button:hover { background: #EFE9DB; }
    .matrix-list button.is-on {
      background: var(--panel);
      color: var(--white);
    }
    .matrix-list button span { display: block; font-size: 12px; color: var(--steel); font-weight: 400; }
    .matrix-list button.is-on span { color: #B7C4C2; }
    .matrix-list em {
      font-style: normal;
      color: var(--amber);
      font-variant-numeric: tabular-nums;
      font-size: 13px;
    }
    .matrix-panel {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--line);
      background: var(--panel);
      color: var(--white);
      min-height: 420px;
    }
    .matrix-panel img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      opacity: .88;
    }
    .matrix-body { padding: 22px 24px 28px; }
    .matrix-body h3 { margin-bottom: 10px; font-size: 22px; }
    .matrix-body p { color: #D4CFC4; font-size: 14px; max-width: 46em; }
    .chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
    .chip {
      border: 1px solid rgba(201, 132, 2, .45);
      color: var(--amber);
      font-size: 12px;
      padding: 4px 8px;
      border-radius: 2px;
    }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .adv-card {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 22px 22px 24px;
      box-shadow: var(--shadow);
      min-height: 210px;
    }
    .adv-card svg { margin-bottom: 14px; }
    .adv-card h3 { font-size: 18px; margin-bottom: 8px; }
    .adv-card p { color: var(--steel); font-size: 14px; }
    .adv-card .metric {
      display: inline-block;
      margin-top: 14px;
      font-size: 13px;
      color: var(--teal);
      border-left: 3px solid var(--amber);
      padding-left: 8px;
    }
    @media (min-width: 1024px) {
      .adv-grid article:nth-child(n+4) { transform: translateY(28px); }
    }
    .stats {
      padding: 0;
      background: var(--panel);
      color: var(--white);
    }
    .stats-inner {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
    }
    .stats-inner article {
      padding: 36px 18px;
      border-right: 1px solid rgba(212, 207, 196, .12);
      text-align: left;
    }
    .stats-inner .stat-value {
      font-size: 30px;
      color: var(--amber);
      display: block;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .stats-inner span { color: #B7B1A4; font-size: 13px; }
    .line-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .line-card {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
    }
    .line-card img { height: 210px; width: 100%; object-fit: cover; }
    .line-card .body { padding: 18px 18px 22px; flex: 1; display: flex; flex-direction: column; }
    .badge-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
    .badge {
      background: #E4EFEA;
      color: var(--ok);
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 2px;
    }
    .badge.warn { background: #F3E6C8; color: #7A5200; }
    .badge.steel { background: #E4E2DC; color: var(--ink); }
    .line-card h3 { font-size: 20px; margin-bottom: 8px; }
    .line-card p { color: var(--steel); font-size: 14px; margin-bottom: 16px; }
    .line-card .btn { align-self: flex-start; margin-top: auto; }
    .timeline {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 0;
      position: relative;
    }
    .timeline::before {
      content: "";
      position: absolute;
      left: 8%;
      right: 8%;
      top: 18px;
      height: 2px;
      background: var(--line-strong);
    }
    .step {
      padding: 0 10px;
      position: relative;
    }
    .step i {
      width: 14px;
      height: 14px;
      border-radius: 1px;
      background: var(--amber);
      display: block;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
      transform: rotate(45deg);
    }
    .step strong { display: block; font-size: 15px; margin-bottom: 6px; }
    .step p { font-size: 13px; color: var(--steel); }
    .scene-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      grid-template-rows: 180px 180px;
      gap: 12px;
    }
    .scene {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--line);
      min-height: 160px;
      color: var(--white);
      display: flex;
      align-items: flex-end;
      padding: 16px;
      background-size: cover;
      background-position: center;
      isolation: isolate;
    }
    .scene::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(16, 19, 23, .1), rgba(16, 19, 23, .78));
      z-index: -1;
    }
    .scene:hover { outline: 2px solid var(--amber); outline-offset: -2px; }
    .scene:first-child { grid-row: 1 / span 2; }
    .scene h3 { font-size: 18px; margin-bottom: 4px; }
    .scene p { font-size: 13px; color: #D8D3C8; }
    .dark-wall {
      background:
        repeating-linear-gradient(-45deg, rgba(201, 132, 2, .045) 0 2px, transparent 2px 14px),
        var(--panel);
      color: var(--white);
    }
    .dark-wall .sec-head p { color: #C9C4B8; }
    .case-layout {
      display: grid;
      grid-template-columns: 1.4fr .8fr;
      gap: 28px;
    }
    .case-mosaic {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      grid-template-rows: 220px 160px;
      gap: 10px;
    }
    .case-item {
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(212, 207, 196, .2);
      cursor: pointer;
      padding: 0;
      background: #101418;
      color: inherit;
      text-align: left;
    }
    .case-item:first-child { grid-row: 1 / span 2; }
    .case-item img { width: 100%; height: 100%; object-fit: cover; opacity: .82; transition: opacity .2s ease, transform .35s ease; }
    .case-item:hover img { opacity: 1; transform: scale(1.04); }
    .case-cap {
      position: absolute;
      left: 0; right: 0; bottom: 0;
      padding: 12px 14px;
      background: linear-gradient(180deg, transparent, rgba(10, 12, 14, .88));
      font-size: 14px;
    }
    .case-abs {
      display: none;
      margin-top: 12px;
      padding: 14px 16px;
      border: 1px solid rgba(201, 132, 2, .35);
      background: rgba(20, 24, 28, .9);
      color: #E7E2D6;
      font-size: 14px;
    }
    .case-item.is-open + .case-abs, .case-abs.is-open { display: block; }
    .principles {
      border: 1px solid rgba(212, 207, 196, .18);
      padding: 22px;
      background: rgba(16, 19, 23, .55);
    }
    .principles h3 { font-size: 20px; margin-bottom: 16px; color: var(--amber); }
    .principles li {
      border-top: 1px solid rgba(212, 207, 196, .12);
      padding: 12px 0;
      font-size: 14px;
      color: #D8D3C8;
    }
    .principles li strong { display: block; color: var(--white); margin-bottom: 4px; }
    .story {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 32px;
      align-items: center;
      margin-bottom: 28px;
      background: var(--paper);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }
    .story:nth-child(even) { grid-template-columns: .9fr 1.1fr; }
    .story:nth-child(even) .story-text { order: 2; }
    .story img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; }
    .story-text { padding: 28px; }
    .story-text h3 { font-size: 22px; margin-bottom: 10px; }
    .story-text p { color: var(--steel); font-size: 14px; margin-bottom: 12px; }
    .quote {
      border-left: 3px solid var(--amber);
      padding-left: 12px;
      color: var(--ink);
      font-size: 15px;
    }
    .delta {
      display: flex;
      gap: 18px;
      margin-top: 16px;
      flex-wrap: wrap;
    }
    .delta b { display: block; font-size: 18px; color: var(--teal); font-variant-numeric: tabular-nums; }
    .delta span { font-size: 12px; color: var(--steel); }
    .review-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .review {
      background: var(--paper);
      border: 1px solid var(--line);
      padding: 20px;
      min-height: 220px;
      box-shadow: var(--shadow);
    }
    .stars { color: var(--amber); letter-spacing: 2px; margin-bottom: 10px; font-size: 13px; }
    .review p { font-size: 14px; color: var(--ink); margin-bottom: 16px; }
    .review footer { font-size: 12px; color: var(--steel); }
    .qc-grid {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 32px;
      align-items: start;
    }
    .qc-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .qc-list li {
      border: 1px solid var(--line);
      background: var(--paper);
      padding: 14px 16px;
      font-size: 14px;
    }
    .qc-list strong { display: block; margin-bottom: 4px; }
    .qc-list span { color: var(--steel); font-size: 13px; }
    .news-list { display: grid; gap: 14px; }
    .news-card {
      display: grid;
      grid-template-columns: 220px 1fr;
      gap: 18px;
      background: var(--paper);
      border: 1px solid var(--line);
      padding: 12px;
      box-shadow: var(--shadow);
      align-items: center;
    }
    .news-card img { height: 128px; width: 100%; object-fit: cover; }
    .news-card time { display: block; font-size: 12px; color: var(--teal); margin-bottom: 6px; font-variant-numeric: tabular-nums; }
    .news-card h3 { font-size: 18px; margin-bottom: 6px; }
    .news-card p { color: var(--steel); font-size: 14px; }
    .more-link {
      display: inline-flex;
      margin-top: 18px;
      min-height: 44px;
      align-items: center;
      color: var(--ink);
      border-bottom: 2px solid var(--amber);
      font-weight: 700;
    }
    .partner-wall {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 10px;
    }
    .partner {
      border: 1px solid var(--line);
      min-height: 72px;
      display: grid;
      place-items: center;
      color: #8A8478;
      background: #EDE8DC;
      font-size: 13px;
      text-align: center;
      padding: 8px;
      filter: grayscale(1);
      transition: filter .2s ease, color .2s ease, border-color .2s ease;
    }
    .partner:hover {
      filter: none;
      color: var(--ink);
      border-color: var(--amber);
    }
    .faq-list { border-top: 1px solid var(--line-strong); }
    .faq-item { border-bottom: 1px solid var(--line-strong); }
    .faq-item button {
      width: 100%;
      background: transparent;
      border: 0;
      text-align: left;
      min-height: 58px;
      padding: 16px 40px 16px 0;
      font-size: 16px;
      font-weight: 700;
      color: var(--ink);
      position: relative;
    }
    .faq-item button::after {
      content: "+";
      position: absolute;
      right: 0;
      top: 50%;
      transform: translateY(-50%);
      color: var(--amber);
      font-size: 22px;
    }
    .faq-item.is-open button::after { content: "–"; }
    .faq-item .ans {
      display: none;
      padding: 0 0 18px;
      color: var(--steel);
      font-size: 14px;
      max-width: 52em;
    }
    .faq-item.is-open .ans { display: block; }
    .guarantee {
      padding: 28px 0;
      background: var(--paper);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .g-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
    }
    .g-grid article {
      padding: 8px 20px;
      border-right: 1px solid var(--line);
      display: grid;
      grid-template-columns: 36px 1fr;
      gap: 12px;
      align-items: center;
    }
    .g-grid h3 { font-size: 15px; margin-bottom: 2px; }
    .g-grid p { font-size: 13px; color: var(--steel); }
    .cta-sec {
      background:
        linear-gradient(90deg, rgba(16, 19, 23, .92), rgba(16, 19, 23, .72)),
        url("/assets/images/21c0193a07de29a6.jpg") center/cover no-repeat;
      color: var(--white);
    }
    .cta-grid {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 40px;
      align-items: start;
    }
    .cta-sec h2 { margin-bottom: 12px; }
    .cta-sec .lead { color: #D4CFC4; margin-bottom: 20px; max-width: 36em; }
    .contact-meta { display: grid; gap: 8px; font-size: 14px; color: #E7E2D6; }
    .contact-meta a { color: var(--amber); }
    .form-box {
      background: var(--paper);
      color: var(--ink);
      padding: 24px;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-hard);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; }
    input, select, textarea {
      min-height: 44px;
      border: 1px solid var(--line-strong);
      background: #FFFDF8;
      color: var(--ink);
      padding: 10px 12px;
      border-radius: 4px;
      font-size: 14px;
    }
    textarea { min-height: 96px; resize: vertical; }
    input:focus, select:focus, textarea:focus {
      border-color: var(--teal);
      outline: 2px solid rgba(31, 122, 114, .25);
    }
    .field.error input, .field.error select, .field.error textarea {
      border-color: var(--danger);
    }
    .err {
      display: none;
      color: var(--danger);
      font-size: 12px;
    }
    .field.error .err { display: block; }
    .form-box .btn { width: 100%; margin-top: 8px; }
    .form-ok {
      display: none;
      padding: 16px;
      background: #E5F0E8;
      color: var(--ok);
      border: 1px solid #B7D2C2;
      margin-bottom: 12px;
      font-size: 14px;
    }
    .form-ok.is-show { display: block; }
    .site-footer {
      background: var(--panel-2);
      color: #B7B1A4;
      padding: 48px 0 24px;
      font-size: 14px;
    }
    .foot-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr 1fr;
      gap: 28px;
      margin-bottom: 28px;
    }
    .site-footer h3 {
      color: var(--white);
      font-size: 15px;
      margin-bottom: 14px;
    }
    .site-footer a { color: #C9C4B8; display: inline-block; min-height: 32px; }
    .site-footer a:hover { color: var(--amber); }
    .foot-copy {
      border-top: 1px solid rgba(212, 207, 196, .12);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      font-size: 12px;
    }
    .drawer {
      position: fixed;
      inset: 0;
      background: rgba(12, 14, 16, .55);
      z-index: 90;
      opacity: 0;
      visibility: hidden;
      transition: .2s ease;
    }
    .drawer.is-open { opacity: 1; visibility: visible; }
    .drawer-panel {
      position: absolute;
      right: 0;
      top: 0;
      bottom: 0;
      width: min(86vw, 360px);
      background: var(--paper);
      padding: 24px 18px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      transform: translateX(24px);
      transition: .2s ease;
    }
    .drawer.is-open .drawer-panel { transform: none; }
    .drawer a {
      min-height: 44px;
      display: flex;
      align-items: center;
      color: var(--ink);
      border-bottom: 1px solid var(--line);
      padding: 0 8px;
    }
    .drawer .nav-cta { margin-top: 16px; }
    @media (max-width: 1280px) {
      .stats-inner { grid-template-columns: repeat(3, 1fr); }
      .partner-wall { grid-template-columns: repeat(4, 1fr); }
    }
    @media (max-width: 1024px) {
      .nav-links, .nav-cta { display: none; }
      .menu-toggle { display: inline-flex; }
      .nav-inner { grid-template-columns: auto auto; justify-content: space-between; }
      .split, .matrix, .case-layout, .story, .story:nth-child(even), .qc-grid, .cta-grid, .news-card {
        grid-template-columns: 1fr;
      }
      .story:nth-child(even) .story-text { order: 0; }
      .adv-grid, .line-grid, .review-track { grid-template-columns: 1fr 1fr; }
      .timeline { grid-template-columns: 1fr 1fr; gap: 18px; }
      .timeline::before { display: none; }
      .scene-grid, .case-mosaic { grid-template-columns: 1fr 1fr; grid-template-rows: none; }
      .scene:first-child, .case-item:first-child { grid-row: auto; min-height: 220px; }
      .takt-bar { grid-template-columns: 1fr 1fr; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .g-grid { grid-template-columns: 1fr 1fr; }
      .g-grid article { border-bottom: 1px solid var(--line); }
      main section { padding: 64px 0; }
    }
    @media (max-width: 768px) {
      .topbar { display: none; }
      html { scroll-padding-top: 62px; }
      .adv-grid, .line-grid, .review-track, .qc-list, .form-grid, .partner-wall, .stats-inner, .g-grid, .foot-grid, .scene-grid, .case-mosaic, .timeline {
        grid-template-columns: 1fr;
      }
      .hero { min-height: 640px; }
      .slides { min-height: 640px; }
      .hero-copy { padding: 54px 0 180px; }
      .hero-dots { bottom: 168px; }
      .hero-controls { right: 16px; bottom: 168px; }
      .matrix-list button { min-height: 56px; }
      .news-card { grid-template-columns: 1fr; }
      .form-box .btn { width: 100%; }
      .container { width: min(100% - 28px, var(--container)); }
    }
    @media (max-width: 520px) {
      body { font-size: 15px; }
      .takt-bar div { padding: 10px 12px; }
      .hero h1, .hero-heading { font-size: 28px; }
      .media-frame img, .story img { min-height: 220px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after {
        animation: none !important;
        transition: none !important;
      }
    }