/* roulang page: index */
:root {
      --ink: #161814;
      --copper: #B56A32;
      --copper-soft: #d7b08a;
      --moss: #3E6A52;
      --paper: #F3F0E8;
      --paper-2: #E7E2D6;
      --silver: #C9CED3;
      --text: #2A2C28;
      --muted: #6A6E66;
      --dark: #10120F;
      --dark-text: #EDE9DF;
      --line: rgba(22, 24, 20, .08);
      --line-strong: rgba(22, 24, 20, .16);
      --copper-line: #B56A32;
      --radius: 6px;
      --shadow: 0 8px 30px rgba(16, 18, 15, .06);
      --shadow-hover: 0 12px 36px rgba(16, 18, 15, .10);
      --header-top: 40px;
      --header-main: 70px;
      --space: 112px;
      --gutter: 24px;
      --max: 1240px;
      --serif: "Noto Serif SC", "Songti SC", serif;
      --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      --mono: "SFMono-Regular", "Cascadia Mono", "Noto Sans SC", monospace;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--paper);
      -webkit-font-smoothing: antialiased;
    }
    body.menu-open { overflow: hidden; }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4 { font-family: var(--serif); font-weight: 650; letter-spacing: .01em; line-height: 1.2; color: var(--ink); margin: 0; }
    p { margin: 0; }
    ul, ol, dl { margin: 0; padding: 0; }
    :focus-visible { outline: 2px solid var(--moss); outline-offset: 2px; }
    .container { width: min(100% - 40px, var(--max)); margin: 0 auto; }
    .skip {
      position: absolute; left: -999px; top: 0;
    }
    .skip:focus { left: 16px; top: 16px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 80; }

    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 22px;
      border-radius: 4px; font-size: 14px; font-weight: 500; letter-spacing: .04em;
      transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
    }
    .btn-primary { background: var(--ink); color: var(--paper); }
    .btn-primary:hover { background: var(--copper); }
    .btn-primary:active { transform: translateY(1px); }
    .btn-ghost {
      background: transparent; color: var(--ink);
      border: 1px solid var(--copper);
    }
    .btn-ghost:hover { background: rgba(181, 106, 50, .12); }
    .btn-light { background: var(--paper); color: var(--ink); }
    .btn-light:hover { background: var(--copper); color: var(--paper); }
    .text-link {
      position: relative; color: var(--ink); font-weight: 500;
    }
    .text-link::after {
      content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
      background: var(--copper); transition: width .25s ease;
    }
    .text-link:hover::after { width: 100%; }
    .badge {
      display: inline-flex; align-items: center; gap: 6px;
      min-height: 28px; padding: 0 10px;
      border: 1px solid var(--copper); color: var(--copper);
      font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
      background: transparent;
    }

    .site-header {
      position: sticky; top: 0; z-index: 50;
      background: rgba(243, 240, 232, .92);
      backdrop-filter: blur(12px);
      transition: box-shadow .2s ease;
    }
    .site-header.is-scrolled { box-shadow: none; border-bottom: 1px solid var(--line-strong); }
    .topbar {
      height: var(--header-top);
      background: var(--ink);
      color: var(--dark-text);
      display: flex; align-items: center;
      overflow: hidden; transition: height .25s ease, opacity .25s ease;
    }
    .site-header.is-scrolled .topbar { height: 0; opacity: 0; }
    .topbar-inner {
      width: min(100% - 40px, var(--max)); margin: 0 auto;
      display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px;
      font-size: 12px; letter-spacing: .06em;
    }
    .topbar a { color: var(--dark-text); min-height: 32px; display: inline-flex; align-items: center; }
    .topbar a:hover { color: var(--copper-soft); }
    .topbar-mid { display: flex; gap: 18px; justify-content: center; }
    .topbar-right { display: flex; gap: 8px; justify-content: flex-end; }
    .mini-badge {
      border: 1px solid rgba(181, 106, 50, .45); color: var(--copper-soft);
      padding: 2px 8px; font-size: 11px; letter-spacing: .08em;
    }
    .mainnav {
      height: var(--header-main);
      display: flex; align-items: center;
      transition: height .25s ease;
    }
    .site-header.is-scrolled .mainnav { height: 60px; }
    .mainnav-inner {
      width: min(100% - 40px, var(--max)); margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
    }
    .logo { display: flex; align-items: center; gap: 10px; min-height: 44px; }
    .logo-mark {
      width: 22px; height: 28px; border: 1.5px solid var(--ink); border-radius: 3px; position: relative;
    }
    .logo-mark::before {
      content: ""; position: absolute; left: 6px; right: 6px; top: -4px; height: 4px;
      background: var(--copper); border-radius: 1px 1px 0 0;
    }
    .logo-mark::after {
      content: ""; position: absolute; left: 4px; right: 4px; top: 6px; bottom: 5px;
      background: linear-gradient(180deg, var(--copper) 0 28%, transparent 28% 40%, var(--moss) 40% 52%, transparent 52% 64%, var(--silver) 64% 76%, transparent 76%);
    }
    .logo-text { font-family: var(--serif); font-size: 18px; font-weight: 700; letter-spacing: .08em; color: var(--ink); }
    .nav-list { display: flex; align-items: center; gap: 4px; list-style: none; }
    .nav-list a {
      position: relative; display: inline-flex; align-items: center;
      min-height: 44px; padding: 0 10px; font-size: 14px; color: var(--text);
    }
    .nav-list a::after {
      content: ""; position: absolute; left: 10px; right: 10px; bottom: 8px; height: 1px;
      background: var(--copper); transform: scaleX(0); transform-origin: left; transition: transform .2s ease;
    }
    .nav-list a:hover::after, .nav-list a.is-active::after { transform: scaleX(1); }
    .nav-cta { margin-left: 8px; }
    .icon-link { width: 44px; height: 44px; display: none; align-items: center; justify-content: center; color: var(--dark-text); }
    .menu-toggle {
      display: none; width: 44px; height: 44px; position: relative;
    }
    .menu-toggle span, .menu-toggle::before, .menu-toggle::after {
      content: ""; position: absolute; left: 12px; right: 12px; height: 1.5px; background: var(--ink);
    }
    .menu-toggle span { top: 21px; }
    .menu-toggle::before { top: 15px; }
    .menu-toggle::after { top: 27px; }
    .drawer-backdrop {
      position: fixed; inset: 0; background: rgba(16, 18, 15, .4); opacity: 0; pointer-events: none;
      transition: opacity .25s ease; z-index: 60;
    }
    .drawer-backdrop.show { opacity: 1; pointer-events: auto; }
    .drawer {
      position: fixed; top: 0; right: 0; width: min(88vw, 400px); height: 100dvh;
      background: var(--paper); z-index: 70; transform: translateX(100%);
      transition: transform .28s ease; padding: 28px 28px 40px; display: flex; flex-direction: column; gap: 28px;
    }
    .drawer.open { transform: translateX(0); }
    .drawer-close {
      align-self: flex-end; width: 44px; height: 44px; border: 1px solid var(--line-strong);
      font-size: 22px; color: var(--ink);
    }
    .drawer-nav { display: flex; flex-direction: column; gap: 4px; }
    .drawer-nav a {
      font-family: var(--serif); font-size: 28px; line-height: 1.3; padding: 10px 0; color: var(--ink);
      border-bottom: 1px solid var(--line);
    }

    .hero {
      position: relative; min-height: 88vh; overflow: hidden; background: var(--dark);
      color: var(--dark-text);
    }
    .hero-slides { position: absolute; inset: 0; }
    .hero-slide {
      position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; pointer-events: none;
    }
    .hero-slide.is-active { opacity: 1; pointer-events: auto; }
    .hero-slide img {
      width: 100%; height: 100%; object-fit: cover; transform: scale(1);
      filter: brightness(.46) saturate(.85);
    }
    .hero-slide.is-active img { animation: kenburns 14s linear forwards; }
    @keyframes kenburns { from { transform: scale(1); } to { transform: scale(1.04); } }
    .hero-grid {
      position: relative; z-index: 2;
      width: min(100% - 40px, var(--max)); margin: 0 auto;
      min-height: 88vh; display: grid; grid-template-columns: 1.15fr .85fr;
      gap: 40px; align-items: end; padding: 72px 0 56px;
    }
    .hero-copy { max-width: 640px; }
    .hero-kicker {
      display: inline-flex; gap: 10px; align-items: center;
      font-size: 12px; letter-spacing: .18em; color: var(--copper-soft); margin-bottom: 18px;
    }
    .hero h1, .slide-title {
      font-size: clamp(32px, 5.4vw, 68px); color: var(--dark-text);
      letter-spacing: .02em; margin-bottom: 16px;
    }
    .hero-lead {
      font-size: 16px; line-height: 1.8; max-width: 38em; color: #d9d4c8; margin-bottom: 28px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
    .hero-metrics {
      display: flex; gap: 22px; padding-top: 18px; border-top: 1px solid rgba(201, 206, 211, .25);
      font-variant-numeric: tabular-nums;
    }
    .hero-metrics b { display: block; font-family: var(--serif); font-size: 20px; font-weight: 600; color: #fff; }
    .hero-metrics span { font-size: 12px; color: #b7b3a8; letter-spacing: .08em; }
    .slot-panel {
      background: rgba(16, 18, 15, .55); border: 1px solid rgba(181, 106, 50, .35);
      padding: 22px; backdrop-filter: blur(8px);
    }
    .slot-panel h2 { color: var(--dark-text); font-size: 22px; margin-bottom: 8px; }
    .slot-panel p { color: #c9c4b8; font-size: 14px; margin-bottom: 16px; }
    .slot-list { display: grid; gap: 10px; }
    .slot-chip {
      text-align: left; min-height: 64px; padding: 12px 14px;
      border: 1px solid rgba(237, 233, 223, .18); color: var(--dark-text);
      display: grid; grid-template-columns: 72px 1fr; gap: 10px; align-items: center;
      transition: border-color .2s ease, background .2s ease;
    }
    .slot-chip strong { font-family: var(--serif); font-size: 20px; font-weight: 600; color: var(--copper-soft); }
    .slot-chip small { display: block; color: #b7b3a8; font-size: 12px; }
    .slot-chip:hover, .slot-chip.is-picked { border-color: var(--copper); background: rgba(181, 106, 50, .12); }
    .hero-nav {
      position: absolute; z-index: 3; left: 0; right: 0; bottom: 22px;
      width: min(100% - 40px, var(--max)); margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between;
    }
    .hero-arrows { display: flex; gap: 8px; }
    .hero-arrows button, .dots button {
      width: 44px; height: 44px; border: 1px solid rgba(237, 233, 223, .3); color: var(--dark-text);
    }
    .hero-arrows button:hover { border-color: var(--copper); color: var(--copper-soft); }
    .dots { display: flex; gap: 8px; }
    .dots button { width: 10px; height: 10px; min-height: 10px; border-radius: 50%; padding: 0; background: rgba(237, 233, 223, .35); border: 0; }
    .dots button.is-on { background: var(--copper); transform: scale(1.2); }

    main { overflow: hidden; }
    .section { padding: var(--space) 0; position: relative; }
    .section-kicker {
      font-size: 12px; letter-spacing: .18em; color: var(--copper); margin-bottom: 12px;
    }
    .section h2 { font-size: clamp(28px, 3.4vw, 42px); margin-bottom: 16px; }
    .section-lead { font-size: 17px; line-height: 1.7; max-width: 40em; color: var(--muted); margin-bottom: 40px; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
    .reveal.is-in { opacity: 1; transform: none; }

    .pain { background: var(--paper-2); }
    .pain-grid { display: grid; grid-template-columns: .28fr .72fr; gap: 48px; align-items: start; }
    .pain-index {
      font-family: var(--serif); font-size: clamp(84px, 12vw, 160px); line-height: .8; color: rgba(22, 24, 20, .12);
    }
    .pain-list { display: grid; gap: 18px; }
    .pain-item {
      display: grid; grid-template-columns: 92px 1fr; gap: 18px;
      background: var(--paper); border: 1px solid var(--line); padding: 18px;
      box-shadow: var(--shadow);
    }
    .pain-item img { width: 92px; height: 92px; object-fit: cover; }
    .pain-item h3 { font-size: 22px; margin-bottom: 8px; }
    .pain-item p { color: var(--muted); font-size: 15px; }

    .split-75 { display: grid; grid-template-columns: 1.35fr .9fr; gap: 48px; align-items: start; }
    .param-bars { margin-top: 22px; display: grid; gap: 12px; }
    .param-bar { border-bottom: 1px solid var(--line-strong); padding-bottom: 10px; display: flex; justify-content: space-between; gap: 12px; }
    .param-bar dt { font-size: 13px; color: var(--muted); letter-spacing: .08em; }
    .param-bar dd { font-family: var(--serif); font-size: 18px; }
    .solution-photo { position: relative; overflow: hidden; }
    .solution-photo img { width: 100%; height: 460px; object-fit: cover; transition: transform .5s ease; }
    .solution-photo:hover img { transform: scale(1.03); }
    .mini-anchors { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 22px; }

    .slot-board { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 16px; }
    .slot-card {
      background: var(--paper); border: 1px solid var(--line); min-height: 280px;
      padding: 22px; display: flex; flex-direction: column; justify-content: flex-end;
      position: relative; overflow: hidden; isolation: isolate;
    }
    .slot-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -1; filter: brightness(.55); transition: transform .5s ease; }
    .slot-card:hover img { transform: scale(1.03); }
    .slot-card:first-child { grid-row: span 1; min-height: 360px; }
    .slot-card time, .slot-card .when { font-family: var(--serif); font-size: 32px; color: #fff; }
    .slot-card h3 { color: #fff; font-size: 22px; margin: 8px 0; }
    .slot-card p { color: #ddd8cc; font-size: 14px; margin-bottom: 16px; }
    .slot-card .btn { align-self: flex-start; }

    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line-strong); }
    .step { padding: 28px 22px 8px 0; border-right: 1px solid var(--line); position: relative; }
    .step:last-child { border-right: 0; }
    .step-num { font-family: var(--serif); font-size: 42px; color: var(--copper); line-height: 1; margin-bottom: 14px; }
    .step h3 { font-size: 20px; margin-bottom: 10px; }
    .step p { font-size: 14px; color: var(--muted); margin-bottom: 12px; }
    .step .result { font-size: 13px; color: var(--moss); letter-spacing: .04em; }

    .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .adv-card {
      background: var(--paper); border: 1px solid var(--line); padding: 26px;
      box-shadow: var(--shadow); min-height: 210px; transition: box-shadow .2s ease, transform .2s ease;
    }
    .adv-card:first-child { grid-column: span 2; background: var(--ink); color: var(--dark-text); }
    .adv-card:first-child h3, .adv-card:first-child p { color: var(--dark-text); }
    .adv-card:hover { box-shadow: var(--shadow-hover); }
    .adv-icon { width: 28px; height: 28px; margin-bottom: 16px; stroke: var(--copper); fill: none; stroke-width: 1.2; }
    .adv-card:first-child .adv-icon { stroke: var(--copper-soft); }
    .adv-card h3 { font-size: 22px; margin-bottom: 10px; }
    .adv-card p { font-size: 15px; color: var(--muted); }
    .adv-card:first-child p { color: #cfc9bc; }

    .product-stack { display: grid; gap: 18px; }
    .product {
      display: grid; grid-template-columns: .9fr 1.1fr; background: #fff; border: 1px solid var(--line);
      min-height: 280px; overflow: hidden;
    }
    .product:nth-child(2) { grid-template-columns: 1.1fr .9fr; }
    .product:nth-child(2) .product-media { order: 2; }
    .product-media { overflow: hidden; }
    .product-media img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; transition: transform .5s ease; }
    .product:hover img { transform: scale(1.03); }
    .product-body { padding: 32px; display: flex; flex-direction: column; gap: 12px; }
    .product-body h3 { font-size: 26px; }
    .spec-row { display: flex; flex-wrap: wrap; gap: 8px; }
    .spec-row span { border: 1px solid var(--line-strong); padding: 4px 10px; font-size: 12px; letter-spacing: .04em; }
    .product-body p { color: var(--muted); font-size: 15px; }

    .team-wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 28px; }
    .team-main { position: relative; overflow: hidden; min-height: 420px; }
    .team-main img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
    .team-caption {
      position: absolute; left: 0; right: 0; bottom: 0; padding: 24px;
      background: linear-gradient(transparent, rgba(16,18,15,.78)); color: var(--dark-text);
    }
    .team-side { display: grid; gap: 14px; }
    .team-person { display: grid; grid-template-columns: 96px 1fr; gap: 14px; border-bottom: 1px solid var(--line-strong); padding-bottom: 14px; }
    .team-person img { width: 96px; height: 96px; object-fit: cover; }
    .team-person h3 { font-size: 18px; margin-bottom: 4px; }
    .trial-box { margin-top: 8px; padding: 18px; border: 1px solid var(--copper); }
    .trial-box h3 { font-size: 18px; margin-bottom: 8px; }
    .trial-box li { list-style: none; font-size: 14px; color: var(--muted); padding-left: 14px; position: relative; margin: 6px 0; }
    .trial-box li::before { content: ""; width: 6px; height: 6px; background: var(--copper); position: absolute; left: 0; top: 9px; }

    .scene-matrix { display: grid; grid-template-columns: 1.4fr 1fr 1fr; grid-template-rows: auto auto; gap: 14px; }
    .scene {
      padding: 24px; border: 1px solid var(--line); background: #fff; min-height: 180px;
      display: flex; flex-direction: column; justify-content: space-between;
    }
    .scene:first-child { grid-row: span 2; background: var(--paper-2); min-height: 380px; }
    .scene h3 { font-size: 22px; margin: 8px 0 10px; }
    .scene p { color: var(--muted); font-size: 14px; }
    .cap { font-family: var(--serif); font-size: 28px; color: var(--copper); }

    .dark-band { background: var(--dark); color: var(--dark-text); padding: 0; }
    .dark-inner {
      width: min(100%, 100%); min-height: 560px; position: relative;
      display: grid; grid-template-columns: 1.1fr .9fr;
    }
    .dark-inner::before {
      content: ""; position: absolute; inset: 0;
      background: url("/assets/images/3dac994cb06f2e6e.webp") center/cover no-repeat;
      opacity: .18; pointer-events: none;
    }
    .dark-quote, .dark-cases { position: relative; padding: 96px 7vw; }
    .dark-quote { border-right: 1px solid rgba(181, 106, 50, .35); }
    .dark-quote h2 { color: var(--dark-text); font-size: clamp(28px, 3vw, 40px); max-width: 12em; }
    .dark-cases { display: grid; align-content: center; gap: 28px; }
    .case-item { padding-bottom: 22px; border-bottom: 1px solid rgba(237, 233, 223, .12); }
    .case-item h3 { color: var(--dark-text); font-size: 22px; margin-bottom: 8px; }
    .case-item p { color: #c4bfb3; }

    .story-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 18px; }
    .story-main { position: relative; overflow: hidden; min-height: 460px; }
    .story-main img { width: 100%; height: 100%; object-fit: cover; min-height: 460px; }
    .story-main figcaption {
      position: absolute; left: 0; right: 0; bottom: 0; padding: 28px;
      background: linear-gradient(transparent, rgba(16,18,15,.82)); color: var(--dark-text);
    }
    .story-main blockquote { font-family: var(--serif); font-size: 24px; line-height: 1.4; margin: 0 0 10px; }
    .story-side { display: grid; gap: 18px; }
    .story-mini { background: #fff; border: 1px solid var(--line); overflow: hidden; }
    .story-mini img { height: 140px; width: 100%; object-fit: cover; }
    .story-mini div { padding: 16px; }
    .story-mini h3 { font-size: 18px; margin-bottom: 6px; }

    .stats {
      background: var(--paper-2); padding: 48px 0;
    }
    .stats-row {
      display: grid; grid-template-columns: repeat(4, 1fr);
      border-top: 1px solid var(--copper); border-bottom: 1px solid var(--copper);
    }
    .stat { padding: 28px 12px; text-align: left; }
    .stat b {
      display: block; font-family: var(--serif); font-size: clamp(32px, 4vw, 52px); font-weight: 500;
      font-variant-numeric: tabular-nums; letter-spacing: -.02em;
    }
    .stat span { color: var(--muted); font-size: 13px; letter-spacing: .08em; }

    .quotes { display: grid; grid-template-columns: 1.3fr .85fr .85fr; gap: 20px; }
    .quote {
      padding: 8px 8px 8px 0; border-top: 1px solid var(--line-strong);
    }
    .quote:first-child { padding-right: 24px; }
    .quote q { display: block; font-family: var(--serif); font-size: 22px; line-height: 1.45; quotes: none; margin: 16px 0; }
    .quote footer { color: var(--muted); font-size: 13px; }
    .guarantee { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }

    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .news-card { background: #fff; border: 1px solid var(--line); overflow: hidden; display: flex; flex-direction: column; }
    .news-card img { height: 190px; width: 100%; object-fit: cover; transition: transform .5s ease; }
    .news-card:hover img { transform: scale(1.03); }
    .news-card div { padding: 18px 18px 22px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
    .news-card time { font-size: 12px; letter-spacing: .12em; color: var(--copper); }
    .news-card h3 { font-size: 20px; }
    .news-card p { color: var(--muted); font-size: 14px; }

    .spec-table {
      display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px;
      border-top: 1px solid var(--ink);
    }
    .spec-table div { display: grid; grid-template-columns: 140px 1fr; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--line-strong); }
    .spec-table dt { font-family: var(--serif); font-size: 16px; }
    .spec-table dd { color: var(--muted); font-size: 15px; }

    .topic-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .topic {
      display: grid; grid-template-columns: 1fr 1.1fr; background: #fff; border: 1px solid var(--line); overflow: hidden;
    }
    .topic img { height: 100%; min-height: 260px; object-fit: cover; }
    .topic-body { padding: 24px; }
    .topic-body h3 { font-size: 22px; margin-bottom: 10px; }
    .topic-body ul { list-style: none; }
    .topic-body li { font-size: 14px; color: var(--muted); padding: 7px 0 7px 14px; position: relative; border-bottom: 1px solid var(--line); }
    .topic-body li::before { content: ""; width: 6px; height: 1px; background: var(--copper); position: absolute; left: 0; top: 16px; }

    .faq-list { max-width: 920px; }
    .faq-item { border-bottom: 1px solid var(--line-strong); }
    .faq-item button {
      width: 100%; text-align: left; min-height: 64px; padding: 18px 40px 18px 0;
      font-family: var(--serif); font-size: 20px; color: var(--ink); position: relative;
    }
    .faq-item button::after {
      content: ""; position: absolute; right: 8px; top: 50%; width: 10px; height: 10px;
      border-right: 1.5px solid var(--copper); border-bottom: 1.5px solid var(--copper);
      transform: translateY(-70%) rotate(45deg); transition: transform .2s ease;
    }
    .faq-item.is-open button::after { transform: translateY(-30%) rotate(225deg); }
    .faq-item .faq-a { height: 0; overflow: hidden; transition: height .28s ease; }
    .faq-item .faq-a p { padding: 0 8% 20px 0; color: var(--muted); max-width: 46em; }
    .faq-item.is-open { border-bottom-color: var(--copper); }

    .cta-band { background: #e7eee8; }
    .cta-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
    .cta-aside { display: grid; gap: 10px; margin-top: 24px; color: var(--muted); font-size: 14px; }
    .cta-aside a { color: var(--ink); }
    form {
      background: var(--paper); padding: 28px; border: 1px solid var(--line);
      display: grid; gap: 16px;
    }
    .fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
    input, select, textarea {
      width: 100%; min-height: 44px; border: 0; border-bottom: 1px solid var(--line-strong);
      background: transparent; color: var(--text); font-size: 15px; padding: 8px 0; border-radius: 0;
    }
    textarea { min-height: 96px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: none; border-bottom-color: var(--copper); }
    .field.error input, .field.error select, .field.error textarea { border-bottom-color: var(--moss); }
    .err { color: var(--moss); font-size: 12px; min-height: 16px; }
    .form-note { font-size: 13px; color: var(--muted); }
    .form-success { display: none; padding: 12px 0; color: var(--moss); font-weight: 500; }
    .form-success.show { display: block; }

    .site-footer { background: var(--ink); color: var(--dark-text); padding: 72px 0 28px; }
    .foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
    .site-footer h2, .site-footer h3 { color: var(--dark-text); font-size: 18px; margin-bottom: 14px; }
    .site-footer p, .site-footer li, .site-footer a { color: #c7c2b6; font-size: 14px; }
    .site-footer ul { list-style: none; display: grid; gap: 8px; }
    .site-footer a:hover { color: var(--copper-soft); }
    .foot-copy { margin-top: 40px; padding-top: 18px; border-top: 1px solid rgba(237,233,223,.12); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12px; color: #9b978c; }

    @media (max-width: 1440px) {
      :root { --space: 100px; }
    }
    @media (max-width: 1024px) {
      :root { --space: 80px; --header-main: 64px; }
      .topbar-inner { grid-template-columns: auto 1fr auto; }
      .topbar-mid { display: none; }
      .icon-link { display: inline-flex; }
      .topbar-right .mini-badge { display: none; }
      .nav-list, .nav-cta { display: none; }
      .menu-toggle { display: block; }
      .hero-grid, .pain-grid, .split-75, .slot-board, .steps, .adv-grid, .team-wrap, .scene-matrix, .dark-inner, .story-grid, .stats-row, .quotes, .news-grid, .spec-table, .topic-row, .cta-grid, .foot-grid, .fields, .product, .product:nth-child(2) {
        grid-template-columns: 1fr;
      }
      .product:nth-child(2) .product-media { order: 0; }
      .adv-card:first-child { grid-column: auto; }
      .hero { min-height: auto; }
      .hero-grid { min-height: auto; padding: 48px 0 88px; align-items: start; }
      .slot-panel { margin-top: 12px; }
      .dark-quote { border-right: 0; border-bottom: 1px solid rgba(181, 106, 50, .35); padding: 64px 24px; }
      .dark-cases { padding: 48px 24px 72px; }
      .scene:first-child { grid-row: auto; min-height: 240px; }
      .topic { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      :root { --space: 64px; }
      .container, .topbar-inner, .mainnav-inner, .hero-grid, .hero-nav { width: min(100% - 32px, var(--max)); }
      .pain-item { grid-template-columns: 72px 1fr; }
      .hero-metrics { flex-wrap: wrap; }
      .steps .step { border-right: 0; border-bottom: 1px solid var(--line); padding: 22px 0; }
      .quotes .quote q { font-size: 18px; }
      .spec-table div { grid-template-columns: 1fr; gap: 4px; }
      .foot-copy { flex-direction: column; }
    }
    @media (max-width: 520px) {
      :root { --space: 56px; }
      .logo-text { font-size: 16px; }
      .hero h1, .slide-title { font-size: 32px; }
      .hero-actions .btn { width: 100%; }
      .btn { width: auto; }
      .slot-chip { grid-template-columns: 64px 1fr; }
      .adv-grid, .news-grid { grid-template-columns: 1fr; }
      .fields { grid-template-columns: 1fr; }
      form { padding: 20px 16px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
      .reveal { opacity: 1; transform: none; }
      .hero-slide img { transform: none; filter: brightness(.5); }
    }

/* roulang page: index */
:root {
      --ink: #1A1A1A;
      --muted: #5A5A5A;
      --paper: #F3F0E8;
      --lime: #E6E1D6;
      --line: #D9D3C7;
      --graphite: #16181B;
      --deep: #0C0E10;
      --cream: #EDEAE2;
      --teal: #1F7A66;
      --teal-2: #2A9A82;
      --copper: #C4863A;
      --white: #F7F4EC;
      --radius: 2px;
      --header-1: 36px;
      --header-2: 72px;
      --container: 1280px;
      --ease: cubic-bezier(.2,.7,.2,1);
      --shadow: 0 1px 0 rgba(22,24,27,.06);
      --mono: "SFMono-Regular", "Cascadia Mono", "Consolas", monospace;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--ink);
      background: var(--paper);
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; }
    h1, h2, h3, .serif { font-family: "Noto Serif SC", "Source Han Serif SC", serif; font-weight: 700; letter-spacing: -.04em; }
    p { margin: 0 0 1.15em; }
    p:last-child { margin-bottom: 0; }
    ul, ol { margin: 0; padding: 0; }
    :focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; }
    .skip {
      position: absolute; left: -999px; top: 8px;
      background: var(--graphite); color: var(--cream); padding: 8px 14px; z-index: 80;
    }
    .skip:focus { left: 8px; }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .site-header {
      position: sticky; top: 0; z-index: 50;
      background: rgba(243,240,232,.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--line);
    }
    .toolbar {
      height: var(--header-1);
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
      font-size: 12px; letter-spacing: .12em; color: var(--muted);
      border-bottom: 1px solid var(--line);
      transition: height .28s var(--ease), opacity .28s var(--ease);
    }
    .toolbar-left, .toolbar-right { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
    .toolbar a { color: var(--muted); min-height: 32px; display: inline-flex; align-items: center; }
    .toolbar a:hover { color: var(--teal); }
    .badge {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 24px; padding: 0 8px;
      border: 1px solid var(--line); color: var(--ink); letter-spacing: .12em;
      font-size: 11px; background: transparent; border-radius: 0;
    }
    .nav-row {
      height: var(--header-2);
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
    }
    .logo {
      display: flex; flex-direction: column; line-height: 1.15; min-height: 44px; justify-content: center;
    }
    .logo-mark { font-family: "Noto Serif SC", serif; font-size: 20px; color: var(--graphite); letter-spacing: .02em; }
    .logo-sub { font-size: 11px; letter-spacing: .18em; color: var(--teal); margin-top: 2px; }
    .nav-links { display: flex; align-items: center; gap: 4px; }
    .nav-links a {
      position: relative; padding: 10px 12px; min-height: 44px;
      display: inline-flex; align-items: center;
      font-size: 14px; color: var(--muted);
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 8px; height: 1px;
      background: var(--copper); transform: scaleX(0); transform-origin: left;
      transition: transform .28s var(--ease);
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--ink); }
    .nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
    .btn {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 44px; padding: 0 18px; border-radius: var(--radius);
      border: 1px solid var(--graphite); background: var(--graphite); color: var(--cream);
      font-size: 14px; letter-spacing: .04em; transition: background .28s var(--ease), color .28s var(--ease), border-color .28s var(--ease), transform .28s var(--ease);
    }
    .btn:hover { background: var(--copper); border-color: var(--copper); color: #fff; }
    .btn:active { transform: translateY(1px); }
    .btn-ghost {
      background: transparent; color: var(--cream); border-color: rgba(237,234,226,.45);
    }
    .btn-ghost:hover { background: var(--copper); border-color: var(--copper); color: #fff; }
    .btn-line {
      background: transparent; color: var(--graphite); border-color: var(--graphite);
    }
    .btn-line:hover { background: var(--copper); border-color: var(--copper); color: #fff; }
    .menu-toggle {
      display: none; width: 44px; height: 44px; border: 0; background: transparent; padding: 0;
      position: relative;
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      display: block; width: 22px; height: 1px; background: var(--graphite); position: absolute; left: 11px;
      transition: transform .28s var(--ease), opacity .28s var(--ease);
    }
    .menu-toggle span { top: 21px; }
    .menu-toggle span::before, .menu-toggle span::after { content: ""; left: 0; }
    .menu-toggle span::before { top: -7px; }
    .menu-toggle span::after { top: 7px; }
    .drawer {
      position: fixed; inset: 0 0 0 auto; width: min(86vw, 380px);
      background: var(--paper); z-index: 60; transform: translateX(100%);
      transition: transform .32s var(--ease); display: flex; flex-direction: column;
      border-left: 1px solid var(--line);
    }
    .drawer.is-open { transform: translateX(0); }
    .drawer-mask {
      position: fixed; inset: 0; background: rgba(12,14,16,.46); z-index: 55;
      opacity: 0; pointer-events: none; transition: opacity .32s var(--ease);
    }
    .drawer-mask.is-open { opacity: 1; pointer-events: auto; }
    .drawer-top { padding: 24px 24px 16px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; }
    .drawer-top a { color: var(--ink); display: block; min-height: 36px; }
    .drawer-nav { display: flex; flex-direction: column; padding: 12px 12px 32px; }
    .drawer-nav a { padding: 14px 12px; min-height: 48px; color: var(--ink); border-bottom: 1px solid var(--line); }
    .header-scrolled .toolbar { height: 0; opacity: 0; overflow: hidden; border: 0; }
    .header-scrolled .nav-row { height: 64px; }
    .hero {
      position: relative; min-height: 100vh; color: var(--cream); overflow: hidden;
      isolation: isolate;
    }
    .hero-slides { position: absolute; inset: 0; z-index: -2; }
    .hero-slide {
      position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease;
      background: #111 center/cover no-repeat;
    }
    .hero-slide.is-active { opacity: 1; }
    .hero-slide.is-active .hero-img { animation: ken 18s ease-out forwards; }
    .hero-img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.02); }
    .hero::after {
      content: ""; position: absolute; inset: 0; z-index: -1;
      background:
        linear-gradient(90deg, rgba(12,14,16,.78) 0%, rgba(12,14,16,.52) 46%, rgba(12,14,16,.28) 100%),
        linear-gradient(180deg, rgba(12,14,16,.18), rgba(12,14,16,.55));
    }
    .energy-line {
      position: absolute; left: 0; right: 0; bottom: 86px; height: 1px; z-index: 1;
      background: linear-gradient(90deg, transparent, var(--teal), transparent);
      background-size: 220px 1px; animation: flow 7s linear infinite;
      opacity: .7;
    }
    .hero-inner {
      width: min(100% - 40px, var(--container)); margin: 0 auto;
      min-height: 100vh; padding: 48px 0 92px;
      display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center;
    }
    .kicker { font-size: 12px; letter-spacing: .2em; color: var(--teal-2); margin-bottom: 18px; }
    .hero h1 {
      font-size: clamp(32px, 4.6vw, 58px); line-height: 1.18; max-width: 9.2em;
      margin: 0 0 22px; color: #fff;
    }
    .hero-lead { max-width: 38em; color: rgba(237,234,226,.88); font-size: 16px; margin-bottom: 28px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
    .trust { display: flex; flex-wrap: wrap; gap: 10px; }
    .trust span {
      border: 1px solid rgba(237,234,226,.28); padding: 6px 10px; font-size: 12px; letter-spacing: .12em;
      min-height: 32px; display: inline-flex; align-items: center;
    }
    .book-panel {
      background: rgba(12,14,16,.55); border: 1px solid rgba(237,234,226,.16);
      padding: 22px 22px 18px;
    }
    .book-panel h2 {
      font-size: 22px; margin: 0 0 8px; color: #fff; letter-spacing: -.03em;
    }
    .book-panel p { color: rgba(237,234,226,.78); font-size: 14px; margin-bottom: 16px; }
    .slot-list { display: grid; gap: 10px; }
    .slot {
      width: 100%; text-align: left; background: transparent; color: var(--cream);
      border: 1px solid rgba(237,234,226,.2); padding: 12px 14px; min-height: 64px;
      display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center;
      transition: border-color .28s var(--ease), background .28s var(--ease), transform .28s var(--ease);
    }
    .slot strong { display: block; font-size: 14px; font-weight: 500; }
    .slot small { color: rgba(237,234,226,.62); letter-spacing: .08em; font-size: 12px; }
    .slot em { font-style: normal; font-size: 12px; color: var(--teal-2); letter-spacing: .12em; }
    .slot:hover, .slot.is-selected { border-color: var(--teal); transform: translateY(-2px); }
    .slot.is-selected { background: rgba(31,122,102,.16); }
    .hero-controls {
      position: absolute; left: 0; right: 0; bottom: 24px;
      width: min(100% - 40px, var(--container)); margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between; z-index: 2;
    }
    .dots { display: flex; gap: 8px; }
    .dots button {
      width: 28px; height: 28px; border: 0; background: transparent; position: relative; padding: 0;
    }
    .dots button i {
      display: block; width: 18px; height: 2px; background: rgba(237,234,226,.35);
    }
    .dots button.is-active i { background: var(--copper); }
    .arrows { display: flex; gap: 8px; }
    .arrows button {
      width: 44px; height: 44px; border: 1px solid rgba(237,234,226,.28);
      background: transparent; color: var(--cream); font-size: 18px;
    }
    .arrows button:hover { border-color: var(--copper); color: #fff; }
    main section { padding: 112px 0; position: relative; }
    .sec-head { max-width: 760px; margin-bottom: 40px; }
    .sec-head h2 {
      font-size: clamp(26px, 3vw, 34px); line-height: 1.28; margin: 0 0 16px;
      padding-left: 14px; border-left: 2px solid var(--teal);
    }
    .sec-head p, .lead { color: var(--muted); }
    .split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
    .split-60 { grid-template-columns: 1.2fr .8fr; }
    .frame { border: 1px solid var(--line); overflow: hidden; background: var(--lime); }
    .frame img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
    .pain-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
    .pain-list li {
      list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
      padding: 18px 0; border-bottom: 1px solid var(--line); font-size: 15px;
    }
    .pain-list .bad { color: var(--muted); }
    .pain-list .good { color: var(--ink); }
    .tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }
    .tag {
      border: 1px solid var(--line); padding: 4px 8px; font-size: 12px; letter-spacing: .08em; color: var(--muted);
    }
    .note {
      font-size: 14px; color: var(--ink); background: var(--lime); padding: 14px 16px; border-left: 2px solid var(--copper);
    }
    .timeline {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative;
    }
    .timeline::before {
      content: ""; position: absolute; left: 0; right: 0; top: 38px; height: 1px; background: var(--line);
    }
    .step { position: relative; }
    .step-num {
      font-family: "Noto Serif SC", serif; font-size: 56px; line-height: 1; color: var(--teal);
      margin-bottom: 12px;
    }
    .step h3 { font-family: "Noto Sans SC", sans-serif; font-size: 18px; font-weight: 500; margin: 0 0 8px; }
    .step p { color: var(--muted); font-size: 14px; }
    .engineers {
      margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
      border-top: 1px solid var(--line); padding-top: 28px;
    }
    .engineer { padding: 8px 0; }
    .engineer b { display: block; font-size: 16px; font-weight: 500; }
    .engineer span { color: var(--muted); font-size: 13px; letter-spacing: .08em; }
    .grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .card {
      border: 1px solid var(--line); background: #f7f4ec; padding: 24px 22px;
      transition: transform .28s var(--ease), border-color .28s var(--ease);
    }
    .card:hover { transform: translateY(-2px); border-color: var(--teal); }
    .card h3 { font-family: "Noto Sans SC", sans-serif; font-size: 18px; font-weight: 500; margin: 0 0 10px; }
    .card p { color: var(--muted); font-size: 14px; }
    .products { display: grid; grid-template-columns: 1.35fr 1fr; grid-template-rows: 1fr 1fr; gap: 16px; }
    .product { position: relative; overflow: hidden; min-height: 240px; background: var(--graphite); color: var(--cream); }
    .product img { width: 100%; height: 100%; object-fit: cover; opacity: .72; min-height: 240px; }
    .product-body { position: absolute; inset: auto 0 0 0; padding: 22px; background: linear-gradient(180deg, transparent, rgba(12,14,16,.86)); }
    .product.large { grid-row: 1 / span 2; min-height: 520px; }
    .product.large img { min-height: 520px; }
    .specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0 14px; }
    .specs div { font-size: 12px; letter-spacing: .06em; }
    .specs b { display: block; font-size: 14px; font-weight: 500; letter-spacing: 0; font-variant-numeric: tabular-nums; }
    .scenes { display: grid; grid-template-columns: 1.3fr .7fr; gap: 16px; }
    .scene-hero { position: relative; min-height: 520px; overflow: hidden; }
    .scene-hero img { width: 100%; height: 100%; object-fit: cover; min-height: 520px; }
    .scene-float {
      position: absolute; right: 20px; top: 20px; bottom: 20px; width: min(78%, 360px);
      display: flex; flex-direction: column; justify-content: flex-end; gap: 8px;
    }
    .scene-float a {
      background: rgba(12,14,16,.82); color: var(--cream); padding: 14px 16px; min-height: 64px;
      border: 1px solid rgba(237,234,226,.12); display: block;
      transition: transform .28s var(--ease), border-color .28s var(--ease);
    }
    .scene-float a:hover { transform: translateY(-2px); border-color: var(--teal); }
    .scene-float strong { display: block; font-size: 16px; font-weight: 500; }
    .scene-float span { color: rgba(237,234,226,.7); font-size: 13px; }
    .scene-side { display: grid; gap: 16px; }
    .scene-side a {
      position: relative; overflow: hidden; min-height: 252px; display: block; color: #fff;
    }
    .scene-side img { width: 100%; height: 100%; object-fit: cover; min-height: 252px; }
    .scene-side span {
      position: absolute; left: 16px; right: 16px; bottom: 16px;
      background: rgba(12,14,16,.72); padding: 12px 14px;
    }
    .dark {
      background: var(--deep); color: var(--cream); padding: 112px 0;
      position: relative; overflow: hidden;
    }
    .dark::before {
      content: ""; position: absolute; inset: 0;
      background: url("/assets/images/b50643a047ab5bac.webp") center/cover no-repeat;
      opacity: .18;
    }
    .dark .container { position: relative; }
    .dark-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
    .quote {
      font-family: "Noto Serif SC", serif; font-size: clamp(28px, 3.4vw, 44px);
      line-height: 1.3; margin: 0; max-width: 8.4em;
    }
    .quote::before { content: ""; display: block; width: 48px; height: 1px; background: var(--copper); margin-bottom: 22px; }
    .case-slice { border-top: 1px solid rgba(196,134,58,.45); padding: 22px 0; }
    .case-slice h3 { font-family: "Noto Sans SC", sans-serif; font-size: 18px; font-weight: 500; margin: 0 0 8px; }
    .case-slice p { color: rgba(237,234,226,.72); }
    .metrics-bar { background: var(--lime); padding: 72px 0; }
    .metrics-bar .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .stat b {
      display: block; font-family: "Noto Serif SC", serif; font-size: clamp(36px, 4vw, 56px);
      line-height: 1; color: var(--graphite); font-variant-numeric: tabular-nums;
    }
    .stat span { display: block; margin-top: 10px; font-size: 12px; letter-spacing: .14em; color: var(--muted); }
    .stories { display: grid; grid-template-columns: 1.25fr .75fr; gap: 24px; }
    .story-main { display: grid; grid-template-columns: 1.1fr .9fr; background: #f7f4ec; border: 1px solid var(--line); }
    .story-main img { width: 100%; height: 100%; object-fit: cover; min-height: 360px; }
    .story-main div, .side-note { padding: 28px; }
    .side-note { border: 1px solid var(--line); margin-bottom: 16px; background: #f7f4ec; }
    .side-note:last-child { margin-bottom: 0; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .review { padding: 28px 24px; background: #fbf8f1; border: 1px solid var(--line); }
    .review q { display: block; quotes: none; font-size: 15px; color: var(--ink); margin-bottom: 22px; }
    .who { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }
    .seal {
      width: 36px; height: 36px; display: grid; place-items: center;
      border: 1px solid var(--copper); color: var(--copper); font-family: "Noto Serif SC", serif;
    }
    .audience { display: grid; grid-template-columns: 1.2fr .8fr; gap: 32px; }
    .check-list { list-style: none; }
    .check-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .exclude { background: var(--lime); padding: 24px; border-left: 2px solid var(--copper); }
    .table-wrap { overflow: auto; border: 1px solid var(--line); }
    table { width: 100%; border-collapse: collapse; min-width: 640px; }
    th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); font-size: 14px; }
    th { background: var(--lime); font-weight: 500; letter-spacing: .08em; font-size: 12px; }
    .spec-dl { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border-top: 1px solid var(--line); }
    .spec-dl div { display: grid; grid-template-columns: 160px 1fr; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .spec-dl dt { font-size: 12px; letter-spacing: .12em; color: var(--muted); }
    .spec-dl dd { margin: 0; font-variant-numeric: tabular-nums; }
    .news-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 16px; }
    .news-card { display: grid; grid-template-columns: 160px 1fr; gap: 16px; border: 1px solid var(--line); background: #f7f4ec; }
    .news-card.feature { grid-column: 1 / -1; grid-template-columns: 320px 1fr; }
    .news-card img { width: 100%; height: 100%; object-fit: cover; min-height: 120px; }
    .news-card div { padding: 16px 16px 16px 0; }
    .news-card time { display: block; font-size: 12px; letter-spacing: .12em; color: var(--muted); margin-bottom: 6px; }
    .news-card h3 { font-family: "Noto Sans SC", sans-serif; font-size: 18px; font-weight: 500; margin: 0 0 8px; }
    .more { display: inline-flex; min-height: 44px; align-items: center; color: var(--teal); }
    .more span { background-image: linear-gradient(var(--teal), var(--teal)); background-size: 0 1px; background-repeat: no-repeat; background-position: left bottom; transition: background-size .28s var(--ease); }
    .more:hover span { background-size: 100% 1px; }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item button {
      width: 100%; text-align: left; background: transparent; border: 0; padding: 18px 36px 18px 0;
      min-height: 56px; font-size: 16px; color: var(--ink); position: relative;
    }
    .faq-item button::after {
      content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
      color: var(--teal); font-size: 22px;
    }
    .faq-item.is-open button::after { content: "−"; }
    .faq-panel { display: none; padding: 0 0 18px; color: var(--muted); background: #f7f4ec; }
    .faq-item.is-open .faq-panel { display: block; padding: 0 8px 18px 0; }
    .contact { background: var(--deep); color: var(--cream); padding: 112px 0; }
    .contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; }
    .contact h2 { color: #fff; border-left-color: var(--copper); }
    .contact p, .contact .meta { color: rgba(237,234,226,.74); }
    .meta a { color: #fff; }
    .form { display: grid; gap: 16px; }
    .field { display: grid; gap: 6px; }
    .field label { font-size: 12px; letter-spacing: .12em; color: rgba(237,234,226,.7); }
    .field input, .field select, .field textarea {
      width: 100%; min-height: 44px; background: transparent; color: #fff;
      border: 0; border-bottom: 1px solid rgba(237,234,226,.28); padding: 8px 0; border-radius: 0;
    }
    .field textarea { min-height: 96px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus {
      outline: none; border-bottom-color: var(--teal);
    }
    .form-error { color: var(--copper); font-size: 13px; min-height: 20px; }
    .form-ok { display: none; border: 1px solid var(--teal); padding: 12px 14px; color: var(--cream); }
    .site-footer { background: var(--graphite); color: rgba(237,234,226,.62); padding: 64px 0 28px; font-size: 14px; }
    .footer-grid { display: grid; grid-template-columns: 1.3fr .8fr .9fr .9fr; gap: 32px; margin-bottom: 40px; }
    .site-footer a { color: rgba(237,234,226,.62); min-height: 32px; display: inline-flex; align-items: center; }
    .site-footer a:hover { color: var(--cream); }
    .footer-logo { font-family: "Noto Serif SC", serif; color: var(--cream); font-size: 20px; display: block; margin-bottom: 10px; }
    .copy { border-top: 1px solid rgba(237,234,226,.1); padding-top: 18px; font-size: 12px; letter-spacing: .08em; }
    @keyframes ken {
      from { transform: scale(1.02) translate3d(0,0,0); }
      to { transform: scale(1.08) translate3d(-1.4%, -1%, 0); }
    }
    @keyframes flow {
      from { background-position: 0 0; }
      to { background-position: 220px 0; }
    }
    @media (max-width: 1440px) {
      .hero h1 { font-size: 48px; }
    }
    @media (max-width: 1024px) {
      main section, .dark, .contact { padding: 88px 0; }
      .hero-inner, .split, .split-60, .dark-grid, .stories, .audience, .contact-grid, .scenes { grid-template-columns: 1fr; }
      .products { grid-template-columns: 1fr; grid-template-rows: none; }
      .product.large, .product.large img { min-height: 360px; }
      .grid-6, .reviews, .metrics-bar .grid, .engineers { grid-template-columns: repeat(2, 1fr); }
      .timeline { grid-template-columns: 1fr 1fr; }
      .timeline::before { display: none; }
      .news-card.feature { grid-template-columns: 200px 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .scene-hero { min-height: 420px; }
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .nav-cta { display: none; }
    }
    @media (max-width: 768px) {
      :root { --header-2: 64px; }
      .container, .hero-inner, .hero-controls { width: min(100% - 32px, var(--container)); }
      main section, .dark, .contact { padding: 64px 0; }
      .toolbar-right { display: none; }
      .hero { min-height: auto; }
      .hero-inner { min-height: auto; padding: 28px 0 108px; }
      .hero h1 { font-size: 34px; }
      .pain-list li, .story-main, .news-card, .news-card.feature, .spec-dl div { grid-template-columns: 1fr; }
      .grid-6, .reviews, .metrics-bar .grid, .engineers, .timeline { grid-template-columns: 1fr; }
      .table-wrap table { display: none; }
      .mobile-dl { display: grid; gap: 0; }
      .mobile-dl div { padding: 12px 0; border-bottom: 1px solid var(--line); }
      .mobile-dl dt { font-size: 12px; letter-spacing: .1em; color: var(--muted); }
      .mobile-dl dd { margin: 4px 0 0; }
      .scene-float { position: static; width: auto; padding: 12px; }
      .footer-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
      body { font-size: 15px; }
      .hero-actions, .trust { flex-direction: column; align-items: stretch; }
      .btn { width: 100%; }
      .spec-dl { grid-template-columns: 1fr; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
      .hero-slide.is-active .hero-img { transform: none; }
    }
    .desktop-only-table { display: block; }
    @media (max-width: 768px) {
      .desktop-only-table { display: none; }
    }
    .mobile-dl { display: none; }
    @media (max-width: 768px) {
      .mobile-dl { display: grid; }
    }