/* roulang page: index */
:root {
      --brand: #6E6256;
      --brand-dark: #4F463D;
      --accent: #C4785A;
      --accent-deep: #A35C42;
      --bg: #F6F3EE;
      --bg-alt: #EBE6DE;
      --bg-card: #FBF9F5;
      --ink: #1A1917;
      --muted: #5E584F;
      --line: #D9D2C7;
      --dark: #1C1B19;
      --paper: #F4F0EA;
      --radius: 6px;
      --shadow: 0 8px 24px rgba(28, 27, 25, .06);
      --shadow-hover: 0 12px 28px rgba(28, 27, 25, .08);
      --container: 1280px;
      --header-h: 108px;
      --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
      --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
      --ease: cubic-bezier(.22, .61, .36, 1);
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: var(--sans);
      font-size: 17px;
      line-height: 1.75;
      color: var(--ink);
      background: var(--bg);
      background-image: radial-gradient(rgba(110, 98, 86, .045) 0.7px, transparent 0.7px);
      background-size: 4px 4px;
      overflow-x: hidden;
    }
    body.is-locked { 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: 600; letter-spacing: -.02em; line-height: 1.22; margin: 0; color: var(--ink); }
    p { margin: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
    ::selection { background: var(--accent); color: #fff; }
    .skip-link {
      position: absolute; left: 16px; top: -40px; z-index: 200;
      background: var(--paper); color: var(--ink); padding: 8px 12px; border-radius: var(--radius);
    }
    .skip-link:focus { top: 12px; }
    .container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 10px;
      font-size: 12px; letter-spacing: .18em; color: var(--brand); text-transform: uppercase;
    }
    .eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
    .section { padding: 120px 0; }
    .section-alt { background: var(--bg-alt); }
    .section-head { max-width: 760px; margin-bottom: 48px; }
    .section-head h2 { font-size: clamp(28px, 3.2vw, 40px); margin: 10px 0 16px; }
    .section-lead { color: var(--muted); font-size: 16px; line-height: 1.8; max-width: 40em; }
    .tag {
      display: inline-flex; align-items: center; height: 28px; padding: 0 10px;
      border: 1px solid var(--line); border-radius: 4px; font-size: 12px; color: var(--brand); background: var(--bg-card);
    }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 22px; border-radius: 4px; font-size: 15px; font-weight: 600;
      transition: transform .28s var(--ease), background .28s var(--ease), color .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
      white-space: nowrap;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(0); }
    .btn-accent { background: var(--accent-deep); color: #fff; }
    .btn-accent:hover { background: #8F4E38; box-shadow: var(--shadow); }
    .btn-dark { background: var(--dark); color: var(--paper); }
    .btn-dark:hover { background: #2A2825; }
    .btn-line { border: 1px solid rgba(244, 240, 234, .45); color: var(--paper); background: transparent; }
    .btn-line:hover { background: rgba(244, 240, 234, .08); border-color: var(--paper); }
    .btn-line-dark { border: 1px solid var(--brand); color: var(--ink); }
    .btn-line-dark:hover { border-color: var(--accent-deep); color: var(--accent-deep); }
    .site-header {
      position: fixed; inset: 0 0 auto 0; z-index: 80;
      background: rgba(28, 27, 25, .42); backdrop-filter: blur(8px);
      border-bottom: 1px solid rgba(244, 240, 234, .08);
      transition: background .3s var(--ease), box-shadow .3s var(--ease);
    }
    .site-header.is-compact {
      background: rgba(28, 27, 25, .96);
      box-shadow: 0 8px 24px rgba(28, 27, 25, .18);
    }
    .topbar {
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
      height: 36px; width: min(var(--container), calc(100% - 48px)); margin: 0 auto;
      color: rgba(244, 240, 234, .72); font-size: 12px;
    }
    .brand-lock { letter-spacing: .16em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .top-tools { display: flex; align-items: center; gap: 18px; }
    .top-tools a { color: rgba(244, 240, 234, .86); }
    .top-tools a:hover { color: #fff; }
    .topbar .btn { min-height: 28px; padding: 0 12px; font-size: 12px; }
    .site-header.is-compact .topbar { display: none; }
    .mainbar {
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
      height: 72px; width: min(var(--container), calc(100% - 48px)); margin: 0 auto;
    }
    .logo { display: flex; align-items: center; gap: 10px; color: var(--paper); min-height: 44px; }
    .logo-mark {
      width: 36px; height: 36px; border: 1px solid rgba(244, 240, 234, .35);
      display: grid; place-items: center; font-family: var(--serif); font-size: 11px; letter-spacing: .08em;
    }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-family: var(--serif); font-size: 16px; font-weight: 600; }
    .logo-text em { font-style: normal; font-size: 11px; letter-spacing: .22em; color: rgba(244, 240, 234, .7); }
    .nav-list { display: flex; align-items: center; gap: 0; }
    .nav-list a {
      position: relative; color: rgba(244, 240, 234, .86); font-size: 14px; letter-spacing: .12em;
      padding: 10px 12px; min-height: 44px; display: inline-flex; align-items: center;
    }
    .nav-list a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 8px; height: 1px;
      background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease);
    }
    .nav-list a:hover, .nav-list a.is-active { color: #fff; font-weight: 600; }
    .nav-list a:hover::after, .nav-list a.is-active::after { transform: scaleX(1); }
    .main-cta { display: flex; align-items: center; gap: 14px; }
    .header-phone { color: var(--paper); font-size: 13px; display: none; }
    .site-header.is-compact .header-phone { display: inline-flex; }
    .menu-toggle {
      display: none; width: 44px; height: 44px; align-items: center; justify-content: center; color: var(--paper);
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      display: block; width: 18px; height: 1px; background: currentColor; position: relative; transition: transform .3s var(--ease), opacity .3s;
    }
    .menu-toggle span::before, .menu-toggle span::after { content: ""; position: absolute; left: 0; }
    .menu-toggle span::before { top: -6px; }
    .menu-toggle span::after { top: 6px; }
    .site-header.is-open .menu-toggle span { background: transparent; }
    .site-header.is-open .menu-toggle span::before { top: 0; transform: rotate(45deg); }
    .site-header.is-open .menu-toggle span::after { top: 0; transform: rotate(-45deg); }
    .drawer {
      position: fixed; inset: 0; background: rgba(28, 27, 25, .97); z-index: 70;
      display: flex; flex-direction: column; justify-content: center; padding: 100px 28px 40px;
      transform: translateX(100%); transition: transform .4s var(--ease); color: var(--paper);
    }
    .site-header.is-open + .drawer, .drawer.is-open { transform: translateX(0); }
    .drawer a { display: flex; align-items: center; min-height: 48px; font-family: var(--serif); font-size: 26px; border-bottom: 1px solid rgba(244, 240, 234, .1); }
    .drawer-meta { margin-top: 28px; color: rgba(244, 240, 234, .7); font-size: 14px; display: grid; gap: 8px; }
    .hero {
      position: relative; min-height: 100vh; min-height: 100svh; color: var(--paper); overflow: hidden;
      background: var(--dark);
    }
    .hero-slide {
      position: absolute; inset: 0; opacity: 0; transition: opacity .45s var(--ease); pointer-events: none;
    }
    .hero-slide.is-active { opacity: 1; pointer-events: auto; }
    .hero-slide-bg {
      position: absolute; inset: -4%; background: center/cover no-repeat;
      transform: scale(1.02);
    }
    .hero-slide.is-active .hero-slide-bg { animation: kenburns 8.5s var(--ease) forwards; }
    @keyframes kenburns { from { transform: scale(1.02); } to { transform: scale(1.08); } }
    .hero-mask {
      position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(28, 27, 25, .88) 0%, rgba(28, 27, 25, .55) 42%, rgba(28, 27, 25, .22) 100%),
        linear-gradient(180deg, rgba(28, 27, 25, .35) 0%, transparent 28%, rgba(28, 27, 25, .72) 100%);
    }
    .hero-copy {
      position: relative; z-index: 2; width: min(var(--container), calc(100% - 48px)); margin: 0 auto;
      min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; justify-content: flex-end;
      padding: 140px 0 96px;
    }
    .brand-kicker { font-size: 13px; letter-spacing: .28em; color: rgba(244, 240, 234, .78); margin-bottom: 18px; }
    .hero h1 { font-size: clamp(40px, 6vw, 68px); color: var(--paper); max-width: 12em; }
    .hero-lead { max-width: 38em; margin: 22px 0 28px; color: rgba(244, 240, 234, .86); font-size: 16px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
    .heat-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
    .heat {
      display: inline-flex; align-items: center; gap: 6px; min-height: 28px; padding: 0 10px;
      border: 1px solid rgba(196, 120, 90, .55); color: #F6D7C8; font-size: 12px; letter-spacing: .08em; border-radius: 4px;
    }
    .heat b { font-weight: 600; color: #fff; }
    .hero-meta {
      display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; border-top: 1px solid rgba(244, 240, 234, .14); padding-top: 16px;
    }
    .slide-caption { font-size: 13px; letter-spacing: .16em; color: rgba(244, 240, 234, .7); }
    .hero-controls { display: flex; align-items: center; gap: 10px; }
    .hero-arrow, .hero-pause {
      width: 44px; height: 44px; border: 1px solid rgba(244, 240, 234, .28); color: var(--paper);
      display: grid; place-items: center; border-radius: 4px; transition: border-color .25s, background .25s;
    }
    .hero-arrow:hover, .hero-pause:hover { border-color: #fff; background: rgba(244, 240, 234, .06); }
    .hero-dots { display: flex; gap: 8px; }
    .hero-dots button {
      width: 28px; height: 2px; background: rgba(244, 240, 234, .28); min-height: 12px; padding: 10px 0;
      background-clip: content-box;
    }
    .hero-dots button.is-active { background-color: var(--accent); }
    .side-code {
      position: absolute; right: 28px; top: 46%; z-index: 2; writing-mode: vertical-rl;
      letter-spacing: .4em; font-size: 11px; color: rgba(244, 240, 234, .45);
    }
    #metrics { scroll-margin-top: 88px; }
    .kpi-board {
      display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); background: var(--bg-card);
    }
    .kpi-cell {
      padding: 36px 28px 32px; border-right: 1px solid var(--line); border-bottom: 1px solid transparent;
    }
    .kpi-cell:last-child { border-right: 0; }
    .kpi-no { font-size: 11px; letter-spacing: .2em; color: var(--brand); margin-bottom: 28px; }
    .kpi-num { font-family: var(--serif); font-size: clamp(40px, 4.5vw, 56px); line-height: 1; color: var(--ink); }
    .kpi-num span { font-size: .42em; margin-left: 6px; color: var(--accent-deep); }
    .kpi-note { margin-top: 14px; color: var(--muted); font-size: 14px; }
    .intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: start; }
    .intro-visual { position: relative; min-height: 520px; }
    .intro-visual img { width: 100%; height: 560px; object-fit: cover; border-radius: var(--radius); }
    .intro-chip {
      position: absolute; right: -18px; bottom: 36px; width: 46%; border: 1px solid var(--line);
      box-shadow: var(--shadow); overflow: hidden; background: var(--bg-card);
    }
    .intro-chip img { height: 160px; }
    .intro-chip p { padding: 12px 14px; font-size: 13px; color: var(--muted); }
    .fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px; }
    .fit-card { background: var(--bg-card); border: 1px solid var(--line); padding: 20px 20px 18px; border-radius: var(--radius); }
    .fit-card h3 { font-size: 18px; margin-bottom: 10px; }
    .fit-card p { color: var(--muted); font-size: 14px; }
    .matrix-grid {
      display: grid; grid-template-columns: 1.4fr 1fr 1fr; grid-template-rows: auto auto auto; gap: 16px;
    }
    .mx {
      background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px;
      transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
    }
    .mx:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: var(--brand); }
    .mx-01 { grid-column: 1 / 2; grid-row: 1 / 3; padding: 0; overflow: hidden; color: var(--paper); position: relative; min-height: 420px; }
    .mx-01 img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .45s var(--ease); }
    .mx-01:hover img { transform: scale(1.03); }
    .mx-01 .mx-body { position: relative; z-index: 1; height: 100%; min-height: 420px; display: flex; flex-direction: column; justify-content: flex-end; padding: 32px; background: linear-gradient(180deg, transparent 20%, rgba(28, 27, 25, .82) 100%); }
    .mx-01 h3, .mx-01 p { color: var(--paper); }
    .mx-06 { grid-column: 1 / -1; display: grid; grid-template-columns: auto 1fr auto; gap: 24px; align-items: center; }
    .mx-no { font-size: 12px; letter-spacing: .18em; color: var(--accent-deep); margin-bottom: 12px; }
    .mx h3 { font-size: 22px; margin-bottom: 10px; }
    .mx p { color: var(--muted); font-size: 15px; }
    .mx-01 p { color: rgba(244, 240, 234, .86); }
    .product-edit { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; }
    .product-main, .product-side article {
      background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
      transition: border-color .3s, transform .3s var(--ease);
    }
    .product-main:hover, .product-side article:hover { border-color: var(--brand); transform: translateY(-2px); }
    .product-main img, .product-side img { width: 100%; object-fit: cover; transition: transform .45s var(--ease); }
    .product-main img { height: 360px; }
    .product-side img { height: 132px; }
    .product-main:hover img, .product-side article:hover img { transform: scale(1.03); }
    .product-side { display: grid; gap: 18px; }
    .p-body { padding: 22px 22px 20px; }
    .p-body h3 { font-size: 24px; margin-bottom: 8px; }
    .p-body p { color: var(--muted); font-size: 15px; margin-bottom: 14px; }
    .spec-row { display: flex; flex-wrap: wrap; gap: 8px; }
    .spec-row span { font-size: 12px; color: var(--brand); border-left: 2px solid var(--accent); padding-left: 8px; }
    .compare-wrap { display: grid; grid-template-columns: 1fr auto 1fr; gap: 28px; align-items: center; }
    .compare-copy h3 { font-size: 22px; margin: 8px 0 12px; }
    .compare-copy p { color: var(--muted); }
    .result-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
    .compare-stage {
      position: relative; min-height: 420px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
    }
    .compare-stage img { width: 100%; height: 420px; object-fit: cover; }
    .compare-after { display: block; }
    .compare-before { position: absolute; inset: 0 auto 0 0; width: 52%; overflow: hidden; border-right: 2px solid var(--accent); }
    .compare-before img { max-width: none; width: var(--stage-w, 640px); }
    .compare-range {
      position: absolute; left: 0; right: 0; bottom: 18px; width: calc(100% - 48px); margin: 0 24px; appearance: none; height: 2px;
      background: rgba(244, 240, 234, .7); z-index: 3;
    }
    .compare-range::-webkit-slider-thumb {
      appearance: none; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); border: 2px solid #fff; cursor: ew-resize;
    }
    .compare-handle {
      position: absolute; top: 0; bottom: 0; width: 2px; background: var(--accent); left: 52%; z-index: 2; pointer-events: none;
    }
    .idea {
      position: relative; color: var(--paper); padding: 120px 0; background: var(--dark) center/cover no-repeat;
    }
    .idea::before { content: ""; position: absolute; inset: 0; background: rgba(28, 27, 25, .78); }
    .idea .container { position: relative; z-index: 1; }
    .idea h2 { color: var(--paper); font-size: clamp(32px, 4vw, 48px); max-width: 14em; }
    .idea .section-lead { color: rgba(244, 240, 234, .78); }
    .case-strip { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 1px; margin-top: 48px; background: rgba(244, 240, 234, .12); }
    .case-slice { background: rgba(28, 27, 25, .55); padding: 28px 22px; min-height: 220px; display: flex; flex-direction: column; justify-content: space-between; }
    .case-slice strong { font-family: var(--serif); font-size: 22px; color: #fff; }
    .case-slice p { color: rgba(244, 240, 234, .78); font-size: 14px; margin-top: 12px; }
    .scene-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr; grid-template-rows: 230px 230px; gap: 14px; }
    .scene {
      position: relative; overflow: hidden; border-radius: var(--radius); color: var(--paper); display: flex; align-items: flex-end; padding: 22px;
      background: center/cover no-repeat; min-height: 160px; isolation: isolate;
    }
    .scene::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 20%, rgba(28, 27, 25, .78) 100%); z-index: -1; }
    .scene:first-child { grid-row: 1 / 3; }
    .scene h3 { font-size: 22px; color: var(--paper); }
    .scene p { font-size: 14px; color: rgba(244, 240, 234, .8); margin-top: 6px; }
    .scene span { display: inline-block; margin-top: 10px; font-size: 13px; border-bottom: 1px solid var(--accent); }
    .timeline { position: relative; max-width: 860px; margin: 0 auto; }
    .timeline::before { content: ""; position: absolute; left: 18px; top: 0; bottom: 0; width: 1px; background: var(--line); }
    .tl-item { position: relative; padding: 0 0 40px 64px; }
    .tl-item::before {
      content: ""; position: absolute; left: 12px; top: 8px; width: 13px; height: 13px; border-radius: 50%;
      background: var(--bg); border: 2px solid var(--accent-deep);
    }
    .tl-year { font-size: 12px; letter-spacing: .16em; color: var(--accent-deep); }
    .tl-item h3 { font-size: 22px; margin: 6px 0 8px; }
    .tl-item p { color: var(--muted); font-size: 15px; }
    .story-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 18px; }
    .story-main { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
    .story-main img { width: 100%; height: 280px; object-fit: cover; }
    .story-main .p-body h3 { font-size: 26px; }
    .story-side { display: grid; gap: 18px; }
    .story-side article { background: var(--bg-card); border: 1px solid var(--line); padding: 24px; border-radius: var(--radius); }
    .story-side h3 { font-size: 18px; margin-bottom: 8px; }
    .story-side p, .story-main p { color: var(--muted); }
    .statbar {
      background: var(--dark) center/cover no-repeat; color: var(--paper); padding: 72px 0; position: relative;
    }
    .statbar::before { content: ""; position: absolute; inset: 0; background: rgba(28, 27, 25, .82); }
    .statbar .container { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
    .stat-item .num { font-family: var(--serif); font-size: clamp(36px, 5vw, 64px); line-height: 1; }
    .stat-item .num span { font-size: .4em; margin-left: 4px; color: var(--accent); }
    .stat-item p { font-size: 13px; color: rgba(244, 240, 234, .7); margin-top: 8px; letter-spacing: .08em; }
    .quote-grid { display: grid; grid-template-columns: 1.1fr .9fr 1fr; gap: 16px; align-items: start; }
    .quote {
      background: var(--bg-card); border: 1px solid var(--line); padding: 26px 24px; border-radius: var(--radius);
      transition: transform .3s var(--ease), border-color .3s;
    }
    .quote:hover { transform: translateY(-3px); border-color: var(--brand); }
    .quote:nth-child(2) { margin-top: 28px; }
    .quote:nth-child(4) { margin-top: -12px; }
    .quote p { color: var(--muted); font-size: 15px; }
    .quote footer { margin-top: 16px; font-size: 13px; color: var(--brand); display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
    .news-list { display: grid; grid-template-columns: 1.3fr 1fr; gap: 16px; }
    .news-feature, .news-item {
      background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
      transition: border-color .3s, transform .3s var(--ease);
    }
    .news-feature:hover, .news-item:hover { border-color: var(--brand); transform: translateY(-2px); }
    .news-feature img { width: 100%; height: 280px; object-fit: cover; }
    .news-stack { display: grid; gap: 16px; }
    .news-item { display: grid; grid-template-columns: 140px 1fr; }
    .news-item img { width: 140px; height: 100%; object-fit: cover; }
    .news-body { padding: 18px 18px 16px; }
    .news-body h3 { font-size: 18px; margin-bottom: 8px; }
    .news-body p { color: var(--muted); font-size: 14px; }
    .news-more { margin-top: 22px; }
    .ensure-axis { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; margin-bottom: 28px; }
    .step {
      border: 1px solid var(--line); background: var(--bg-card); padding: 20px 16px; border-radius: var(--radius); position: relative;
    }
    .step b { display: block; font-family: var(--serif); font-size: 20px; color: var(--accent-deep); margin-bottom: 8px; }
    .step h3 { font-size: 16px; margin-bottom: 6px; }
    .step p { font-size: 13px; color: var(--muted); }
    .badge-row { display: flex; flex-wrap: wrap; gap: 8px; }
    .badge { border: 1px solid var(--brand); color: var(--brand-dark); padding: 6px 10px; font-size: 12px; border-radius: 4px; }
    .quick-list { border-top: 1px solid var(--line); }
    .quick-item { border-bottom: 1px solid var(--line); }
    .quick-item button {
      width: 100%; text-align: left; min-height: 52px; display: flex; align-items: center; justify-content: space-between; gap: 16px;
      padding: 12px 0; font-size: 16px; color: var(--ink);
    }
    .quick-item button span { color: var(--brand); font-size: 12px; letter-spacing: .12em; }
    .quick-item .a { display: none; color: var(--muted); font-size: 15px; padding: 0 0 14px; }
    .quick-item.is-open .a { display: block; }
    .faq-list { display: grid; gap: 10px; }
    .faq-item { border: 1px solid var(--line); background: var(--bg-card); border-radius: var(--radius); overflow: hidden; }
    .faq-item button {
      width: 100%; min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 16px;
      padding: 14px 18px; font-size: 16px; font-weight: 600; text-align: left; color: var(--ink);
    }
    .faq-icon { width: 14px; height: 14px; position: relative; flex: 0 0 14px; }
    .faq-icon::before, .faq-icon::after {
      content: ""; position: absolute; background: var(--brand); left: 50%; top: 50%; transform: translate(-50%, -50%);
    }
    .faq-icon::before { width: 14px; height: 1px; }
    .faq-icon::after { width: 1px; height: 14px; }
    .faq-item.is-open .faq-icon { transform: rotate(45deg); }
    .faq-panel { height: 0; opacity: 0; overflow: hidden; transition: height .36s var(--ease), opacity .28s var(--ease); }
    .faq-item.is-open .faq-panel { opacity: 1; }
    .faq-panel p { padding: 0 18px 18px; color: var(--muted); background: #F3EEE6; margin: 0 10px 10px; padding-top: 12px; }
    .cta-band {
      background: var(--dark) center/cover no-repeat; color: var(--paper); padding: 42px 0; position: relative; margin-bottom: 48px;
    }
    .cta-band::before { content: ""; position: absolute; inset: 0; background: rgba(28, 27, 25, .8); }
    .cta-band .container { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
    .cta-band h2 { color: var(--paper); font-size: 28px; }
    .convert-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; }
    .form { display: grid; gap: 14px; }
    .form label { display: grid; gap: 6px; font-size: 14px; color: var(--brand-dark); }
    .form input, .form select, .form textarea {
      height: 46px; border: 1px solid var(--line); background: #fff; border-radius: 4px; padding: 0 12px; color: var(--ink); font-size: 15px;
      transition: border-color .25s;
    }
    .form textarea { height: 110px; padding: 10px 12px; resize: vertical; }
    .form input:focus, .form select:focus, .form textarea:focus { border-color: var(--brand); outline: none; }
    .form .is-error { border-color: var(--accent-deep); }
    .err { color: var(--accent-deep); font-size: 12px; min-height: 16px; }
    .form-ok {
      display: none; border: 1px solid var(--brand); background: var(--bg-card); padding: 16px; color: var(--brand-dark); border-radius: var(--radius);
    }
    .trust { background: var(--bg-card); border: 1px solid var(--line); padding: 28px; border-radius: var(--radius); }
    .trust h3 { font-size: 22px; margin-bottom: 12px; }
    .trust p { color: var(--muted); margin-bottom: 10px; }
    .trust a { color: var(--ink); border-bottom: 1px solid var(--accent); }
    .site-footer { background: var(--dark); color: rgba(244, 240, 234, .72); padding: 64px 0 28px; font-size: 14px; }
    .foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
    .foot-brand strong { display: block; font-family: var(--serif); color: var(--paper); font-size: 20px; margin-bottom: 8px; }
    .foot-grid h3 { color: var(--paper); font-size: 14px; letter-spacing: .16em; margin-bottom: 14px; font-family: var(--sans); font-weight: 600; }
    .foot-grid a { display: block; min-height: 32px; color: rgba(244, 240, 234, .72); }
    .foot-grid a:hover { color: #fff; }
    .foot-bottom { border-top: 1px solid rgba(244, 240, 234, .1); padding-top: 16px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12px; }
    section[id], #contact { scroll-margin-top: 86px; }
    @media (max-width: 1280px) {
      .container, .topbar, .mainbar, .hero-copy { width: min(100% - 40px, var(--container)); }
      .intro-chip { right: 12px; }
      .mx-06 { grid-template-columns: auto 1fr; }
    }
    @media (max-width: 1024px) {
      .nav-list, .main-cta .btn, .header-phone { display: none; }
      .menu-toggle { display: flex; }
      .kpi-board { grid-template-columns: 1fr 1fr; }
      .kpi-cell:nth-child(1), .kpi-cell:nth-child(2) { border-bottom: 1px solid var(--line); }
      .kpi-cell:nth-child(2), .kpi-cell:nth-child(4) { border-right: 0; }
      .intro-grid, .product-edit, .compare-wrap, .story-grid, .news-list, .convert-grid { grid-template-columns: 1fr; }
      .matrix-grid { grid-template-columns: 1fr 1fr; }
      .mx-01 { grid-column: 1 / -1; grid-row: auto; min-height: 320px; }
      .mx-06 { grid-column: 1 / -1; }
      .scene-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 200px 200px 200px; }
      .scene:first-child { grid-row: auto; min-height: 220px; }
      .case-strip { grid-template-columns: 1fr 1fr; }
      .ensure-axis { grid-template-columns: 1fr 1fr 1fr; }
      .quote-grid { grid-template-columns: 1fr 1fr; }
      .quote:nth-child(2), .quote:nth-child(4) { margin-top: 0; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .side-code { display: none; }
      .intro-visual img { height: 420px; }
    }
    @media (max-width: 768px) {
      .section { padding: 72px 0; }
      .top-tools span, .top-tools a.mail { display: none; }
      .hero-copy { padding: 120px 0 72px; }
      .hero h1 { font-size: 34px; }
      .hero-lead { font-size: 15px; }
      .fit-grid, .ensure-axis, .quote-grid { grid-template-columns: 1fr; }
      .matrix-grid { grid-template-columns: 1fr; }
      .scene-grid { grid-template-columns: 1fr; grid-template-rows: none; }
      .news-item { grid-template-columns: 1fr; }
      .news-item img { width: 100%; height: 180px; }
      .product-main img { height: 240px; }
      .compare-stage, .compare-stage img { min-height: 280px; height: 280px; }
      .statbar .container { display: grid; grid-template-columns: 1fr 1fr; }
      .cta-band .container { flex-direction: column; align-items: flex-start; }
      .foot-grid { grid-template-columns: 1fr; gap: 22px; }
      .mx-06 { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
      body { font-size: 16px; }
      .container, .topbar, .mainbar, .hero-copy { width: calc(100% - 32px); }
      .section { padding: 60px 0; }
      .kpi-board { grid-template-columns: 1fr; }
      .kpi-cell { border-right: 0; border-bottom: 1px solid var(--line); }
      .statbar .container { grid-template-columns: 1fr; }
      .hero-actions .btn { width: 100%; }
      .intro-chip { position: relative; right: auto; bottom: auto; width: 100%; margin-top: 12px; }
      .intro-visual { min-height: 0; }
      .case-strip { grid-template-columns: 1fr; }
      .brand-lock { max-width: 46vw; }
    }
    @media (max-width: 375px) {
      .logo-text strong { font-size: 15px; }
      .hero h1 { font-size: 30px; }
      .topbar { font-size: 11px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
    }

/* roulang page: index */
:root {
      --ink: #2F2C29;
      --green: #2E6A62;
      --green-deep: #24554f;
      --terra: #B85A3A;
      --gypsum: #F4F0EA;
      --paper: #FFFCF7;
      --line: #D9D2C8;
      --dark: #161412;
      --muted: #6E675F;
      --cream: #E8E0D4;
      --white: #FFFcf7;
      --radius: 8px;
      --radius-sm: 6px;
      --shadow: 0 8px 20px rgba(47, 44, 41, .07);
      --shadow-sm: 0 4px 10px rgba(47, 44, 41, .05);
      --container: 1280px;
      --ease: 200ms ease;
      --space: 112px;
      --space-m: 64px;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
      color: var(--ink);
      background: var(--gypsum);
      font-size: 16px;
      line-height: 1.75;
      letter-spacing: .01em;
    }
    body::before {
      content: "";
      pointer-events: none;
      position: fixed;
      inset: 0;
      z-index: 80;
      opacity: .05;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(/%23n)'/%3E%3C/svg%3E");
    }
    img { max-width: 100%; display: block; height: auto; }
    a { color: var(--green); text-decoration: none; transition: color var(--ease), opacity var(--ease); }
    a:hover { color: var(--green-deep); }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; }
    h1, h2, h3, .logo-name, .display {
      font-family: "Noto Serif SC", "Source Han Serif SC", serif;
      font-weight: 700;
      letter-spacing: -.04em;
      line-height: 1.2;
      color: var(--ink);
      margin: 0;
    }
    h1 { font-size: clamp(36px, 4.6vw, 54px); }
    h2 { font-size: clamp(28px, 3vw, 36px); }
    h3 { font-size: clamp(20px, 2vw, 24px); }
    p { margin: 0 0 1em; }
    p:last-child { margin-bottom: 0; }
    ul { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }
    .container { width: min(calc(100% - 40px), var(--container)); margin: 0 auto; }
    .section { padding: var(--space) 0; position: relative; }
    .section-alt { background: var(--paper); }
    .kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--green);
      font-size: 13px;
      letter-spacing: .18em;
      text-transform: none;
      font-weight: 600;
      margin-bottom: 14px;
    }
    .kicker::before {
      content: "";
      width: 18px;
      height: 1px;
      background: var(--green);
    }
    .lead {
      max-width: 38em;
      color: var(--muted);
      font-size: 16px;
    }
    .section-head { margin-bottom: 48px; max-width: 760px; }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border: 1px solid var(--line);
      background: rgba(255,252,247,.78);
      color: var(--ink);
      border-radius: var(--radius-sm);
      padding: 4px 10px;
      font-size: 12px;
      letter-spacing: .04em;
    }
    .badge-terra { background: var(--terra); color: #fff; border-color: transparent; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 22px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--ink);
      background: var(--ink);
      color: var(--gypsum);
      font-size: 14px;
      font-weight: 600;
      letter-spacing: .04em;
      transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
    }
    .btn:hover, .btn:active { background: #3d3935; color: #fff; }
    .btn-ghost {
      background: transparent;
      color: var(--gypsum);
      border-color: rgba(244,240,234,.45);
    }
    .btn-ghost:hover { background: rgba(244,240,234,.1); color: #fff; border-color: #fff; }
    .btn-line {
      background: transparent;
      color: var(--ink);
      border-color: var(--ink);
    }
    .btn-line:hover { background: var(--ink); color: var(--gypsum); }
    .btn-green { background: var(--green); border-color: var(--green); color: #fff; }
    .btn-green:hover { background: var(--green-deep); border-color: var(--green-deep); color: #fff; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 90;
      background: rgba(244,240,234,.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--line);
      transition: box-shadow var(--ease);
    }
    .site-header.is-compact { box-shadow: var(--shadow-sm); }
    .toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: 36px;
      font-size: 12px;
      color: var(--muted);
      border-bottom: 1px solid rgba(217,210,200,.7);
    }
    .toolbar-left { display: flex; flex-wrap: wrap; gap: 18px; }
    .toolbar a { color: var(--ink); }
    .toolbar a:hover { color: var(--green); }
    .toolbar .btn { min-height: 30px; padding: 0 12px; font-size: 12px; }
    .nav-main {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      min-height: 72px;
    }
    .logo {
      display: flex;
      align-items: baseline;
      gap: 8px;
      color: var(--ink);
      flex-shrink: 0;
    }
    .logo-name { font-size: 22px; }
    .logo-sub { font-size: 12px; color: var(--muted); letter-spacing: .22em; }
    .nav-links { display: flex; align-items: center; gap: 4px; }
    .nav-links a {
      position: relative;
      color: var(--ink);
      font-size: 14px;
      padding: 10px 10px;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      left: 10px;
      right: 10px;
      bottom: 8px;
      height: 2px;
      background: var(--green);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 240ms ease;
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--green); }
    .nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
    .nav-cta { display: flex; align-items: center; gap: 10px; }
    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      background: var(--paper);
      border-radius: var(--radius-sm);
      position: relative;
    }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
      position: absolute;
      width: 18px;
      height: 1.5px;
      background: var(--ink);
      left: 12px;
    }
    .menu-toggle span { top: 21px; }
    .menu-toggle span::before { content: ""; top: -6px; }
    .menu-toggle span::after { content: ""; top: 6px; }
    .drawer {
      position: fixed;
      inset: 0 0 0 auto;
      width: min(86vw, 360px);
      background: var(--paper);
      transform: translateX(100%);
      transition: transform 280ms ease;
      z-index: 120;
      padding: 28px 24px 40px;
      overflow-y: auto;
      box-shadow: -12px 0 30px rgba(22,20,18,.12);
    }
    .drawer.is-open { transform: translateX(0); }
    .drawer-mask {
      position: fixed;
      inset: 0;
      background: rgba(22,20,18,.38);
      opacity: 0;
      pointer-events: none;
      transition: opacity 280ms ease;
      z-index: 110;
    }
    .drawer-mask.is-open { opacity: 1; pointer-events: auto; }
    .drawer a { display: flex; align-items: center; min-height: 48px; color: var(--ink); border-bottom: 1px solid var(--line); }
    .drawer .btn { width: 100%; margin-top: 18px; }
    .drawer-contact { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
    .site-header.is-compact .toolbar { display: none; }
    .site-header.is-compact .nav-main { min-height: 60px; }
    .hero {
      position: relative;
      min-height: calc(100vh - 108px);
      background: var(--dark);
      color: var(--gypsum);
      overflow: hidden;
    }
    .hero-slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity 900ms ease;
    }
    .hero-slide.is-active { opacity: 1; }
    .hero-slide img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transform: scale(1.06);
      animation: ken 18s linear infinite;
    }
    .hero-slide.is-active img { animation-name: ken; }
    @keyframes ken {
      from { transform: scale(1.04) translateY(0); }
      to { transform: scale(1.12) translateY(-1.5%); }
    }
    .hero-mask {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(22,20,18,.78) 0%, rgba(22,20,18,.42) 48%, rgba(22,20,18,.2) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      min-height: calc(100vh - 108px);
      display: grid;
      align-items: end;
      padding: 72px 0 80px;
    }
    .hero-tag {
      display: inline-flex;
      border: 1px solid rgba(244,240,234,.28);
      padding: 6px 12px;
      font-size: 12px;
      letter-spacing: .16em;
      margin-bottom: 22px;
      color: var(--gypsum);
    }
    .hero h1 { color: var(--gypsum); max-width: 10em; }
    .hero .lead { color: rgba(244,240,234,.82); margin: 22px 0 32px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-ctrl {
      position: absolute;
      z-index: 3;
      bottom: 28px;
      left: 0;
      right: 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .hero-dots { display: flex; gap: 8px; }
    .hero-dots button {
      width: 18px;
      height: 2px;
      padding: 12px 0;
      background: transparent;
      border: 0;
      position: relative;
    }
    .hero-dots button::after {
      content: "";
      position: absolute;
      left: 0; right: 0; top: 11px;
      height: 2px;
      background: rgba(244,240,234,.35);
    }
    .hero-dots button.is-active::after { background: var(--gypsum); }
    .hero-arrows { display: flex; gap: 8px; }
    .hero-arrows button {
      width: 44px;
      height: 44px;
      border: 1px solid rgba(244,240,234,.28);
      background: transparent;
      color: var(--gypsum);
      border-radius: var(--radius-sm);
      font-size: 18px;
    }
    .hero-arrows button:hover { background: rgba(244,240,234,.08); }
    .metrics { background: var(--paper); }
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      background: var(--line);
      border: 1px solid var(--line);
    }
    .metric-card {
      background: var(--paper);
      padding: 36px 28px;
    }
    .metric-card .num {
      font-family: "Noto Sans SC", sans-serif;
      font-size: clamp(48px, 6vw, 78px);
      font-weight: 700;
      letter-spacing: -.06em;
      line-height: .9;
      color: var(--ink);
    }
    .metric-card .unit { color: var(--green); font-size: 14px; margin: 8px 0 12px; font-weight: 600; }
    .metric-card p { color: var(--muted); font-size: 14px; }
    .intro-grid {
      display: grid;
      grid-template-columns: 1.35fr .85fr;
      gap: 48px;
      align-items: center;
    }
    .intro-visual { position: relative; }
    .intro-visual img {
      width: 100%;
      height: 620px;
      object-fit: cover;
      border-radius: var(--radius);
    }
    .intro-spec {
      position: absolute;
      left: -28px;
      bottom: 28px;
      width: min(86%, 360px);
      background: var(--paper);
      padding: 22px;
      box-shadow: var(--shadow);
      border: 1px solid var(--line);
    }
    .intro-spec dt { font-size: 12px; color: var(--muted); }
    .intro-spec dd { margin: 0 0 10px; font-weight: 600; }
    .spec-list { display: grid; gap: 10px; margin-top: 22px; }
    .spec-list li {
      padding-left: 16px;
      border-left: 2px solid var(--green);
      color: var(--muted);
      font-size: 15px;
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 16px;
    }
    .matrix-card {
      background: var(--paper);
      border: 1px solid var(--line);
      padding: 28px 24px;
      border-radius: var(--radius);
      transition: transform var(--ease), box-shadow var(--ease);
    }
    .matrix-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .matrix-card:nth-child(1), .matrix-card:nth-child(2) { grid-column: span 6; min-height: 240px; }
    .matrix-card:nth-child(n+3) { grid-column: span 3; }
    .matrix-no { font-size: 12px; letter-spacing: .16em; color: var(--terra); margin-bottom: 12px; }
    .micro { margin: 10px 0 14px; color: var(--green); font-weight: 600; font-size: 13px; }
    .matrix-card p { font-size: 14px; color: var(--muted); }
    .product-feature {
      display: grid;
      grid-template-columns: 1.4fr .8fr;
      gap: 16px;
    }
    .product-card {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      background: var(--dark);
      color: var(--gypsum);
      min-height: 420px;
    }
    .product-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      position: absolute;
      inset: 0;
      transition: transform 400ms ease;
    }
    .product-card:hover img { transform: scale(1.03); }
    .product-card .body {
      position: relative;
      z-index: 2;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 28px;
      background: linear-gradient(180deg, transparent 20%, rgba(22,20,18,.78) 100%);
    }
    .product-card h3, .product-card p { color: var(--gypsum); }
    .params { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 18px; }
    .params span {
      border: 1px solid rgba(244,240,234,.25);
      padding: 4px 8px;
      font-size: 12px;
    }
    .product-stack { display: grid; gap: 16px; }
    .product-stack .product-card { min-height: 202px; }
    .compare-wrap {
      display: grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 40px;
      align-items: center;
    }
    .compare-stage {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      min-height: 460px;
      user-select: none;
    }
    .compare-stage img { width: 100%; height: 460px; object-fit: cover; }
    .compare-after { position: absolute; inset: 0; width: 52%; overflow: hidden; }
    .compare-after img { width: calc(100vw * .52); max-width: none; height: 460px; }
    .compare-range {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      opacity: 0;
      cursor: ew-resize;
    }
    .compare-bar {
      position: absolute;
      top: 0; bottom: 0;
      left: 52%;
      width: 2px;
      background: var(--gypsum);
      transform: translateX(-1px);
    }
    .compare-bar::after {
      content: "⟷";
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 36px;
      height: 36px;
      border-radius: 50%;
      border: 1px solid var(--line);
      background: var(--paper);
      color: var(--ink);
      display: grid;
      place-items: center;
      font-size: 12px;
    }
    .compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
    .compare-table th, .compare-table td {
      text-align: left;
      padding: 12px 0;
      border-bottom: 1px solid var(--line);
    }
    .compare-table th { color: var(--muted); font-weight: 500; width: 28%; }
    .cases-dark {
      background: var(--dark);
      color: var(--gypsum);
      padding: 120px 0;
    }
    .cases-dark h2, .cases-dark h3 { color: var(--gypsum); }
    .idea {
      font-family: "Noto Serif SC", serif;
      font-size: clamp(28px, 4vw, 48px);
      letter-spacing: -.04em;
      margin: 8px 0 48px;
      max-width: 10em;
    }
    .case-list { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 16px; }
    .case-item {
      border: 1px solid rgba(217,210,200,.18);
      min-height: 280px;
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
    }
    .case-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: brightness(.72);
      position: absolute;
      inset: 0;
    }
    .case-item .txt {
      position: relative;
      z-index: 1;
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }
    .timeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
    .mile {
      padding: 0 18px 0 0;
      border-top: 1px solid var(--line);
      position: relative;
      padding-top: 28px;
    }
    .mile::before {
      content: "";
      width: 9px;
      height: 9px;
      background: var(--green);
      border-radius: 50%;
      position: absolute;
      top: -5px;
      left: 0;
    }
    .mile .year { color: var(--green); font-size: 13px; font-weight: 600; }
    .stories-grid {
      display: grid;
      grid-template-columns: 1.2fr .9fr .9fr;
      gap: 18px;
    }
    .story {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      transition: transform var(--ease);
    }
    .story:hover { transform: translateY(-4px); }
    .story img { width: 100%; height: 220px; object-fit: cover; transition: transform 400ms ease; }
    .story:hover img { transform: scale(1.03); }
    .story .body { padding: 22px; }
    .story:first-child { grid-row: span 1; }
    .meta-row { font-size: 12px; color: var(--muted); letter-spacing: .08em; margin-bottom: 8px; }
    .statbar {
      background: var(--ink);
      color: var(--gypsum);
      padding: 36px 0;
    }
    .statbar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .statbar b {
      display: block;
      font-size: 32px;
      font-family: "Noto Sans SC", sans-serif;
      letter-spacing: -.04em;
    }
    .statbar span { color: rgba(244,240,234,.7); font-size: 13px; }
    .reviews {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 16px;
    }
    .review {
      background: var(--paper);
      border: 1px solid var(--line);
      padding: 24px;
      border-radius: var(--radius);
    }
    .review:nth-child(1) { grid-column: span 5; margin-top: 28px; }
    .review:nth-child(2) { grid-column: span 7; }
    .review:nth-child(3) { grid-column: span 4; }
    .review:nth-child(4) { grid-column: span 4; margin-top: 24px; }
    .review:nth-child(5) { grid-column: span 4; }
    .stars { color: var(--terra); letter-spacing: 2px; font-size: 13px; margin-bottom: 10px; }
    .news-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 16px;
    }
    .news-card {
      background: var(--paper);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: transform var(--ease);
    }
    .news-card:hover { transform: translateY(-4px); }
    .news-card img { height: 180px; width: 100%; object-fit: cover; }
    .news-card .body { padding: 20px; }
    .news-card:first-child { min-height: 100%; }
    .news-card:first-child img { height: 280px; }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
    }
    .g-card {
      background: var(--paper);
      border: 1px solid var(--line);
      padding: 22px 18px;
      text-align: left;
      border-radius: var(--radius);
    }
    .seal {
      width: 42px;
      height: 42px;
      border: 1px solid var(--green);
      color: var(--green);
      display: grid;
      place-items: center;
      border-radius: 50%;
      font-size: 11px;
      margin-bottom: 14px;
    }
    .scene-layout {
      display: grid;
      grid-template-columns: 280px 1fr;
      gap: 24px;
    }
    .scene-chips { display: flex; flex-direction: column; gap: 8px; }
    .scene-chips button {
      min-height: 48px;
      text-align: left;
      padding: 10px 14px;
      border: 1px solid var(--line);
      background: var(--paper);
      color: var(--ink);
      border-radius: var(--radius-sm);
    }
    .scene-chips button.is-active {
      background: var(--ink);
      color: var(--gypsum);
      border-color: var(--ink);
    }
    .scene-view {
      position: relative;
      min-height: 460px;
      overflow: hidden;
      border-radius: var(--radius);
    }
    .scene-view img { width: 100%; height: 460px; object-fit: cover; }
    .scene-caption {
      position: absolute;
      left: 20px;
      right: 20px;
      bottom: 20px;
      background: rgba(22,20,18,.78);
      color: var(--gypsum);
      padding: 18px 20px;
    }
    .quick-chips { display: flex; flex-wrap: wrap; gap: 10px; }
    .quick-chips button {
      min-height: 44px;
      padding: 0 16px;
      border: 1px solid var(--line);
      background: var(--paper);
      color: var(--ink);
      border-radius: var(--radius-sm);
    }
    .quick-chips button:hover, .quick-chips button.is-on {
      border-color: var(--green);
      color: var(--green);
    }
    .quick-preview {
      margin-top: 18px;
      min-height: 52px;
      color: var(--muted);
    }
    .faq-list { display: grid; gap: 10px; }
    .faq-item { border: 1px solid var(--line); background: var(--paper); border-radius: var(--radius); }
    .faq-item button {
      width: 100%;
      text-align: left;
      background: transparent;
      border: 0;
      min-height: 56px;
      padding: 16px 20px;
      font-size: 16px;
      font-weight: 600;
      color: var(--ink);
      display: flex;
      justify-content: space-between;
      gap: 16px;
    }
    .faq-item .panel {
      height: 0;
      overflow: hidden;
      transition: height 280ms ease;
    }
    .faq-item .panel-inner { padding: 0 20px 18px; color: var(--muted); }
    .consult {
      background: linear-gradient(180deg, #ece6dc, var(--gypsum));
    }
    .consult-grid {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 40px;
      align-items: start;
    }
    .form-card {
      background: var(--paper);
      border: 1px solid var(--line);
      padding: 28px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .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: 600; }
    input, select, textarea {
      min-height: 44px;
      border: 1px solid var(--line);
      background: #fbf7f1;
      border-radius: var(--radius-sm);
      padding: 8px 12px;
      color: var(--ink);
    }
    textarea { min-height: 90px; resize: vertical; }
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: var(--green);
      box-shadow: 0 0 0 3px rgba(46,106,98,.12);
    }
    .error { color: var(--terra); font-size: 12px; min-height: 16px; }
    .form-success {
      display: none;
      padding: 28px 8px;
      text-align: center;
    }
    .form-success.is-show { display: block; }
    .form-card.is-done form { display: none; }
    .site-footer {
      background: var(--dark);
      color: rgba(244,240,234,.78);
      padding: 72px 0 28px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1.1fr .9fr;
      gap: 32px;
      margin-bottom: 40px;
    }
    .site-footer h3 { color: var(--gypsum); font-size: 16px; margin-bottom: 14px; }
    .site-footer a { color: rgba(244,240,234,.78); }
    .site-footer a:hover { color: #fff; }
    .copy {
      border-top: 1px solid rgba(217,210,200,.16);
      padding-top: 18px;
      font-size: 12px;
      color: rgba(244,240,234,.5);
    }
    @media (max-width: 1440px) {
      .container { width: min(calc(100% - 48px), 1200px); }
    }
    @media (max-width: 1024px) {
      :root { --space: 88px; }
      .nav-links { display: none; }
      .nav-cta .btn { display: none; }
      .menu-toggle { display: inline-flex; }
      .intro-grid, .product-feature, .compare-wrap, .consult-grid, .scene-layout { grid-template-columns: 1fr; }
      .matrix-card:nth-child(1), .matrix-card:nth-child(2) { grid-column: span 6; }
      .matrix-card:nth-child(n+3) { grid-column: span 6; }
      .metric-grid, .timeline, .guarantee-grid, .statbar-grid, .footer-grid { grid-template-columns: 1fr 1fr; }
      .stories-grid, .news-grid, .case-list { grid-template-columns: 1fr 1fr; }
      .intro-visual img { height: 420px; }
      .intro-spec { left: 16px; }
    }
    @media (max-width: 768px) {
      :root { --space: 64px; }
      .toolbar-left span:nth-child(3) { display: none; }
      .hero-content { padding: 48px 0 96px; }
      .metric-grid { grid-template-columns: 1fr; }
      .matrix-card:nth-child(1),
      .matrix-card:nth-child(2),
      .matrix-card:nth-child(n+3) { grid-column: span 12; }
      .reviews .review { grid-column: span 12 !important; margin-top: 0 !important; }
      .stories-grid, .news-grid, .case-list, .timeline, .guarantee-grid, .statbar-grid, .footer-grid, .form-grid {
        grid-template-columns: 1fr;
      }
      .compare-stage, .compare-stage img, .compare-after img, .scene-view img { height: 320px; }
      .hero { min-height: 92vh; }
      .container { width: min(calc(100% - 28px), 100%); }
    }
    @media (max-width: 520px) {
      h1 { font-size: 32px; }
      .hero-actions .btn { width: 100%; }
      .metric-card .num { font-size: 56px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after {
        animation: none !important;
        transition: none !important;
      }
    }