/* roulang page: index */
:root {
      --graphite: #25282E;
      --orange: #FF6B1A;
      --orange-deep: #E05510;
      --teal: #1BA3A0;
      --teal-deep: #147F7D;
      --beige: #EDE8DF;
      --paper: #FBFBF8;
      --dark: #121417;
      --silver: #C5C1B7;
      --text: #1C1C1C;
      --muted: #5C5852;
      --on-dark: #F3EFE6;
      --on-dark-muted: #B8B3A8;
      --white: #FFFFFF;
      --danger: #C2410C;
      --radius-card: 8px;
      --radius-btn: 4px;
      --radius-tile: 4px;
      --shadow: 0 2px 6px rgba(28, 28, 28, 0.08);
      --shadow-hover: 0 4px 12px rgba(28, 28, 28, 0.12);
      --container: 1240px;
      --header-tool: 36px;
      --header-main: 64px;
      --z-header: 1000;
      --z-overlay: 1100;
      --space-section: 88px;
      --focus: 0 0 0 2px var(--paper), 0 0 0 4px var(--teal);
      --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.7;
      color: var(--text);
      background: var(--paper);
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--teal-deep); text-decoration: none; transition: color .2s, background .2s, border-color .2s, transform .2s, box-shadow .2s; }
    a:hover { color: var(--orange); }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; border: 0; background: none; }
    h1, h2, h3, h4 { margin: 0 0 .6em; line-height: 1.28; font-weight: 650; letter-spacing: 0; color: var(--text); }
    p { margin: 0 0 1em; }
    ul, ol { margin: 0; padding: 0; }
    table { border-collapse: collapse; width: 100%; }
    :focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }
    .skip {
      position: absolute; left: -999px; top: 0;
      background: var(--orange); color: #fff; padding: 8px 16px; z-index: 2000;
    }
    .skip:focus { left: 12px; top: 12px; }
    .container { width: min(100% - 32px, var(--container)); margin: 0 auto; }
    .container-wide { width: min(100% - 24px, 1280px); margin: 0 auto; }

    /* Buttons */
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 0 20px;
      border-radius: var(--radius-btn); font-size: 15px; font-weight: 600;
      letter-spacing: .02em; transition: transform .15s, background .15s, border-color .15s, box-shadow .15s, color .15s;
      text-decoration: none; border: 1px solid transparent;
    }
    .btn-primary { background: var(--orange); color: #fff; }
    .btn-primary:hover { background: var(--orange-deep); color: #fff; transform: translateY(-1px); }
    .btn-primary:active { transform: translateY(0); }
    .btn-ghost { background: transparent; color: var(--on-dark); border-color: rgba(243,239,230,.45); }
    .btn-ghost:hover { border-color: var(--orange); color: #fff; transform: translateY(-1px); }
    .btn-line { background: transparent; color: var(--graphite); border-color: var(--graphite); }
    .btn-line:hover { background: var(--graphite); color: #fff; transform: translateY(-1px); }
    .btn:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }

    .badge {
      display: inline-flex; align-items: center; gap: 4px;
      height: 22px; padding: 0 8px; font-size: 12px; border-radius: 3px;
      border: 1px solid var(--teal); color: var(--teal-deep); background: rgba(27,163,160,.08);
      letter-spacing: .04em;
    }
    .badge-orange { border-color: var(--orange); color: var(--orange-deep); background: rgba(255,107,26,.08); }
    .badge-dark { border-color: rgba(243,239,230,.28); color: var(--on-dark); background: rgba(255,255,255,.04); }

    /* Dual-row header */
    .site-header { position: relative; z-index: var(--z-header); }
    .toolbar {
      background: var(--graphite); color: var(--on-dark-muted);
      font-size: 12.5px; height: var(--header-tool); display: flex; align-items: center;
    }
    .toolbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: min(100% - 32px, var(--container)); margin: 0 auto; }
    .toolbar-left { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; min-width: 0; }
    .toolbar a { color: var(--on-dark); }
    .toolbar a:hover { color: var(--orange); }
    .toolbar-marks { display: flex; gap: 8px; }
    .mark {
      border: 1px solid rgba(197,193,183,.35); color: var(--on-dark-muted);
      padding: 0 6px; height: 20px; display: inline-flex; align-items: center; font-size: 11px; border-radius: 2px;
    }
    .toolbar-cta { color: var(--orange) !important; font-weight: 650; white-space: nowrap; min-height: 28px; display: inline-flex; align-items: center; }
    .nav-bar {
      background: var(--paper); border-bottom: 1px solid var(--silver);
      height: var(--header-main);
    }
    .nav-bar.is-stuck {
      position: sticky; top: 0; box-shadow: var(--shadow); z-index: var(--z-header);
    }
    .nav-inner {
      height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px;
      width: min(100% - 32px, var(--container)); margin: 0 auto;
    }
    .logo { display: flex; align-items: center; gap: 10px; color: var(--text); min-width: 0; flex-shrink: 0; }
    .logo-mark {
      width: 36px; height: 36px; border-radius: 4px; background: var(--graphite); color: var(--orange);
      display: grid; place-items: center; font-weight: 700; font-size: 13px; letter-spacing: .04em;
      border: 1px solid #3a3d44;
    }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-size: 18px; color: var(--graphite); }
    .logo-text span { font-size: 12px; color: var(--muted); margin-top: 2px; }
    .nav-links { display: flex; align-items: stretch; gap: 2px; height: 100%; }
    .nav-links a {
      color: var(--text); font-size: 14px; padding: 0 10px; display: flex; align-items: center;
      position: relative; height: 100%; white-space: nowrap;
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 10px; right: 10px; bottom: 0; height: 2px;
      background: var(--orange); transform: scaleX(0); transform-origin: left; transition: transform .18s;
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--graphite); }
    .nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .burger {
      display: none; width: 44px; height: 44px; border: 1px solid var(--silver); border-radius: 4px;
      align-items: center; justify-content: center; flex-direction: column; gap: 5px;
    }
    .burger span { width: 18px; height: 1.5px; background: var(--graphite); display: block; transition: transform .2s, opacity .2s; }
    .burger.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
    .burger.is-open span:nth-child(2) { opacity: 0; }
    .burger.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
    .mobile-panel {
      display: none; position: fixed; inset: calc(var(--header-tool) + var(--header-main)) 0 0 0;
      background: var(--paper); z-index: var(--z-overlay); padding: 12px 20px 32px;
      overflow: auto;
    }
    .mobile-panel.is-open { display: block; }
    .mobile-panel a {
      display: flex; align-items: center; min-height: 48px; border-bottom: 1px solid var(--beige);
      color: var(--text); font-size: 16px;
    }
    body.menu-open { overflow: hidden; }

    /* Hero carousel */
    #hero { position: relative; background: var(--dark); color: var(--on-dark); overflow: hidden; }
    .slides { position: relative; min-height: 620px; }
    .slide {
      position: absolute; inset: 0; opacity: 0; visibility: hidden;
      transition: opacity .55s ease, visibility .55s;
      display: flex; align-items: center;
    }
    .slide.is-on { opacity: 1; visibility: visible; position: relative; }
    .slide-bg {
      position: absolute; inset: 0; background-size: cover; background-position: center;
      transform: scale(1.04);
    }
    .slide-bg::after {
      content: ""; position: absolute; inset: 0;
      background:
        linear-gradient(90deg, rgba(18,20,23,.88) 0%, rgba(18,20,23,.62) 46%, rgba(18,20,23,.28) 100%),
        radial-gradient(ellipse at 80% 50%, transparent 0%, rgba(18,20,23,.45) 100%);
    }
    .slide-copy { position: relative; z-index: 2; padding: 72px 0; max-width: 720px; }
    .kicker { color: var(--orange); font-size: 13px; letter-spacing: .14em; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
    .kicker::before { content: ""; width: 28px; height: 1px; background: var(--orange); }
    .slide h1, .slide h2.slide-title {
      font-size: clamp(28px, 4.2vw, 46px); color: var(--on-dark); margin-bottom: 16px; font-weight: 700;
    }
    .slide p.lead {
      font-size: 16px; color: var(--on-dark-muted); max-width: 38em; margin-bottom: 28px;
    }
    .cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-ctrl {
      position: absolute; inset: 0; pointer-events: none; z-index: 3;
    }
    .hero-arrow {
      pointer-events: auto; position: absolute; top: 50%; transform: translateY(-50%);
      width: 44px; height: 44px; border: 1px solid rgba(243,239,230,.35); color: var(--on-dark);
      border-radius: 4px; background: rgba(18,20,23,.45); font-size: 20px;
    }
    .hero-arrow:hover { border-color: var(--orange); color: var(--orange); }
    .hero-prev { left: max(12px, calc((100% - var(--container)) / 2 - 8px)); }
    .hero-next { right: max(12px, calc((100% - var(--container)) / 2 - 8px)); }
    .hero-dots {
      pointer-events: auto; position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%);
      display: flex; gap: 8px;
    }
    .hero-dots button {
      width: 22px; height: 4px; background: rgba(243,239,230,.35); border-radius: 1px;
    }
    .hero-dots button.is-on { background: var(--orange); }
    .hero-play {
      pointer-events: auto; position: absolute; right: 24px; bottom: 18px;
      min-width: 44px; height: 32px; border: 1px solid rgba(243,239,230,.3); color: var(--on-dark);
      border-radius: 4px; font-size: 12px; padding: 0 10px;
    }

    /* Sections */
    .section { padding: var(--space-section) 0; }
    .section-beige { background: var(--beige); }
    .section-paper { background: var(--paper); }
    .section-head { margin-bottom: 36px; max-width: 46em; }
    .section-head h2 { font-size: clamp(22px, 2.4vw, 30px); }
    .section-head p { color: var(--muted); margin: 0; max-width: 42em; }
    .eyebrow { font-size: 12px; letter-spacing: .16em; color: var(--orange); margin-bottom: 8px; }

    /* KPI */
    #kpi { background: var(--paper); border-top: 1px solid var(--silver); }
    .kpi-grid {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
    }
    .kpi-tile {
      background: var(--white); border: 1px solid var(--silver); border-radius: var(--radius-tile);
      padding: 22px 20px 18px; box-shadow: var(--shadow); position: relative; overflow: hidden;
    }
    .kpi-tile::before {
      content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--teal);
    }
    .kpi-num {
      font-variant-numeric: tabular-nums; font-feature-settings: "tnum";
      font-size: 34px; font-weight: 700; color: var(--graphite); line-height: 1.1; letter-spacing: -.02em;
    }
    .kpi-unit { font-size: 14px; color: var(--teal-deep); margin-left: 4px; font-weight: 600; }
    .kpi-label { margin-top: 8px; font-size: 13px; color: var(--muted); }
    .kpi-trend { margin-top: 10px; font-size: 12px; color: var(--teal-deep); display: flex; align-items: center; gap: 6px; }
    .spark { height: 18px; width: 64px; display: block; }

    /* Intro */
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
    .intro-photo { position: relative; border-radius: 8px; overflow: hidden; min-height: 380px; background: var(--graphite); }
    .intro-photo img { width: 100%; height: 100%; object-fit: cover; min-height: 380px; }
    .intro-photo.is-fallback { background:
      repeating-linear-gradient(135deg, #2b2e35 0 8px, #32363e 8px 16px);
    }
    .intro-photo.is-fallback::after {
      content: attr(data-label); position: absolute; inset: 0; display: grid; place-items: center;
      color: var(--on-dark); font-size: 18px; letter-spacing: .12em;
    }
    .param-bars { margin-top: 22px; display: grid; gap: 12px; }
    .param-row { display: grid; grid-template-columns: 110px 1fr 88px; gap: 10px; align-items: center; font-size: 13px; }
    .param-row span:first-child { color: var(--muted); }
    .bar { height: 6px; background: #e4dfd6; border-radius: 1px; overflow: hidden; }
    .bar > i { display: block; height: 100%; background: var(--teal); }
    .param-row b { font-variant-numeric: tabular-nums; font-weight: 650; text-align: right; }
    .check-list { list-style: none; margin: 18px 0 0; }
    .check-list li {
      position: relative; padding-left: 22px; margin-bottom: 8px; color: var(--text); font-size: 15px;
    }
    .check-list li::before { content: ""; position: absolute; left: 0; top: 8px; width: 10px; height: 10px; border: 2px solid var(--teal); border-radius: 1px; }

    /* Matrix 6 cards */
    .matrix-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .mx-card {
      background: var(--white); border: 1px solid var(--silver); border-radius: var(--radius-card);
      overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
      transition: transform .15s, box-shadow .15s;
    }
    .mx-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
    .mx-cover { height: 128px; position: relative; overflow: hidden; background: var(--graphite); }
    .mx-cover img { width: 100%; height: 100%; object-fit: cover; }
    .mx-body { padding: 18px 18px 16px; display: flex; flex-direction: column; flex: 1; }
    .mx-body h3 { font-size: 17px; margin-bottom: 10px; }
    .mx-body ul { list-style: none; margin-bottom: 16px; flex: 1; }
    .mx-body li { font-size: 13.5px; color: var(--muted); padding: 4px 0 4px 14px; position: relative; }
    .mx-body li::before { content: ""; width: 6px; height: 1px; background: var(--orange); position: absolute; left: 0; top: 12px; }
    .mx-link { font-size: 13px; font-weight: 650; color: var(--teal-deep); }
    .mx-link:hover { color: var(--orange); }

    /* Products */
    .prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .prod-card {
      background: var(--white); border: 1px solid var(--silver); border-radius: var(--radius-card);
      overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
    }
    .prod-cover { height: 180px; background: var(--graphite); position: relative; }
    .prod-cover img { width: 100%; height: 100%; object-fit: cover; }
    .prod-body { padding: 18px; display: flex; flex-direction: column; flex: 1; }
    .prod-body h3 { font-size: 18px; margin-bottom: 4px; }
    .prod-sub { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
    .spec { width: 100%; font-size: 13px; }
    .spec tr { border-bottom: 1px solid var(--beige); }
    .spec th { text-align: left; color: var(--muted); font-weight: 500; padding: 7px 0; width: 38%; }
    .spec td { padding: 7px 0; font-variant-numeric: tabular-nums; }
    .prod-cta { margin-top: 16px; }

    /* Compare */
    .compare-wrap { overflow-x: auto; }
    .cmp {
      width: 100%; min-width: 640px; background: var(--white); border: 1px solid var(--silver);
      border-radius: 6px; overflow: hidden;
    }
    .cmp th, .cmp td { padding: 14px 16px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--beige); }
    .cmp thead th { background: var(--graphite); color: var(--on-dark); font-weight: 600; }
    .cmp thead th:nth-child(3) { color: var(--orange); }
    .cmp tbody th { width: 22%; color: var(--muted); font-weight: 500; background: #f6f3ee; }
    .cmp td.good { color: var(--teal-deep); font-weight: 650; }
    .sparkline { display: inline-block; vertical-align: middle; margin-left: 8px; }
    .mobile-cmp { display: none; }

    /* Cases dark */
    #cases { background: var(--dark); color: var(--on-dark); padding: 88px 0; position: relative; }
    #cases::before {
      content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px; background: var(--orange);
    }
    #cases h2, #cases .section-head p { color: var(--on-dark); }
    #cases .section-head p { color: var(--on-dark-muted); }
    .case-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 14px; }
    .case-item { position: relative; min-height: 240px; overflow: hidden; border-radius: 6px; }
    .case-item.tall { min-height: 494px; grid-row: span 2; }
    .case-item .bg {
      position: absolute; inset: 0; background-size: cover; background-position: center;
      filter: saturate(.85);
    }
    .case-item .bg::after {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(18,20,23,.15) 20%, rgba(18,20,23,.82) 100%);
    }
    .case-cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 22px 22px 20px; z-index: 1; }
    .case-cap h3 { color: #fff; font-size: 18px; margin-bottom: 6px; }
    .case-cap p { color: var(--on-dark-muted); font-size: 14px; margin: 0; max-width: 36em; }

    /* Timeline */
    .timeline {
      display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; padding-top: 12px;
    }
    .timeline::before {
      content: ""; position: absolute; left: 8%; right: 8%; top: 28px; height: 1px; background: var(--silver);
    }
    .ms { padding: 0 12px; position: relative; }
    .ms-dot {
      width: 12px; height: 12px; border-radius: 50%; background: var(--orange); border: 2px solid var(--paper);
      box-shadow: 0 0 0 1px var(--orange); margin-bottom: 16px; position: relative; z-index: 1;
    }
    .ms time { display: block; font-variant-numeric: tabular-nums; color: var(--orange); font-weight: 700; font-size: 14px; }
    .ms h3 { font-size: 16px; margin: 6px 0; }
    .ms p { font-size: 13.5px; color: var(--muted); margin: 0; }

    /* Stories */
    .story-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; }
    .story-main, .story-side article {
      background: var(--white); border: 1px solid var(--silver); border-radius: 8px; overflow: hidden;
    }
    .story-main { display: grid; grid-template-columns: 1.1fr .9fr; }
    .story-main img, .story-side img { width: 100%; height: 100%; object-fit: cover; min-height: 220px; }
    .story-copy { padding: 24px; }
    .story-copy h3 { font-size: 18px; }
    .story-copy p { color: var(--muted); font-size: 14.5px; }
    .story-side { display: grid; gap: 16px; }
    .story-side article { display: grid; grid-template-columns: 120px 1fr; min-height: 140px; }

    /* Stats bar */
    #stats { background: var(--graphite); color: var(--on-dark); padding: 36px 0; }
    .stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .stat-item { text-align: left; border-left: 2px solid var(--orange); padding-left: 16px; }
    .stat-item b {
      display: block; font-size: 32px; font-variant-numeric: tabular-nums; font-weight: 700; color: #fff; line-height: 1.1;
    }
    .stat-item span { font-size: 13px; color: var(--on-dark-muted); }

    /* Reviews */
    .rev-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .rev {
      background: var(--white); border: 1px solid var(--silver); border-radius: 8px; padding: 22px 22px 18px;
      box-shadow: var(--shadow);
    }
    .rev p { font-size: 15px; margin-bottom: 14px; }
    .rev footer { display: flex; justify-content: space-between; align-items: baseline; font-size: 13px; color: var(--muted); border-top: 1px solid var(--beige); padding-top: 12px; }
    .rev strong { color: var(--text); font-weight: 650; }

    /* News */
    .news-list { display: grid; gap: 12px; }
    .news-item {
      display: grid; grid-template-columns: 180px 1fr auto; gap: 18px; align-items: center;
      background: var(--white); border: 1px solid var(--silver); border-radius: 6px; overflow: hidden;
      padding-right: 18px;
    }
    .news-item img { width: 180px; height: 112px; object-fit: cover; }
    .news-item h3 { font-size: 16px; margin-bottom: 6px; }
    .news-item p { font-size: 13.5px; color: var(--muted); margin: 0; }
    .news-meta { font-size: 12px; color: var(--muted); display: flex; gap: 10px; margin-bottom: 6px; align-items: center; }
    .news-more { margin-top: 20px; }

    /* Guarantee steps */
    .steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
    .step { padding: 8px 16px 8px 0; position: relative; }
    .step-no {
      width: 36px; height: 36px; border-radius: 4px; background: var(--graphite); color: var(--orange);
      display: grid; place-items: center; font-weight: 700; font-variant-numeric: tabular-nums; margin-bottom: 12px;
    }
    .step h3 { font-size: 16px; }
    .step p { font-size: 13.5px; color: var(--muted); margin: 0; }
    .step:not(:last-child)::after {
      content: ""; position: absolute; right: 8px; top: 24px; width: 18%; height: 1px; background: var(--silver);
    }

    /* Quick chips */
    .chips { display: flex; flex-wrap: wrap; gap: 10px; }
    .chip {
      min-height: 44px; padding: 0 16px; border: 1px solid var(--silver); background: var(--white);
      border-radius: 4px; color: var(--text); font-size: 14px;
    }
    .chip:hover, .chip:focus-visible { border-color: var(--orange); color: var(--orange-deep); }
    .chip-ans {
      display: none; margin-top: 14px; padding: 14px 16px; background: var(--white);
      border-left: 3px solid var(--teal); font-size: 14px; color: var(--muted);
    }
    .chip-ans.is-on { display: block; }

    /* FAQ */
    .faq-list { display: grid; gap: 8px; }
    .faq-item { background: var(--white); border: 1px solid var(--silver); border-radius: 6px; overflow: hidden; }
    .faq-item[open] { border-color: var(--teal); }
    .faq-item summary {
      list-style: none; cursor: pointer; min-height: 52px; display: flex; align-items: center; justify-content: space-between;
      gap: 12px; padding: 12px 18px; font-weight: 650; font-size: 15px;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; color: var(--orange); font-size: 20px; font-weight: 400; }
    .faq-item[open] summary::after { content: "–"; }
    .faq-item .faq-a { padding: 0 18px 16px; color: var(--muted); font-size: 14.5px; max-width: 46em; }

    /* Contact */
    #contact { background: var(--beige); }
    .contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: start; }
    .form-card { background: var(--white); border: 1px solid var(--silver); border-radius: 8px; padding: 28px; box-shadow: var(--shadow); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; color: var(--muted); }
    .field input, .field select, .field textarea {
      min-height: 44px; border: 1px solid var(--silver); border-radius: 4px; padding: 8px 12px;
      background: var(--paper); color: var(--text); font-size: 15px;
    }
    .field textarea { min-height: 96px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus {
      outline: 2px solid var(--teal); outline-offset: 1px; border-color: var(--teal);
    }
    .field.is-err input, .field.is-err select, .field.is-err textarea { border-color: var(--orange); }
    .err { display: none; color: var(--danger); font-size: 12px; }
    .field.is-err .err { display: block; }
    .checks { display: flex; flex-wrap: wrap; gap: 8px 14px; }
    .checks label { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text); min-height: 32px; }
    .form-ok {
      display: none; margin-top: 12px; padding: 12px 14px; background: rgba(27,163,160,.1);
      border: 1px solid var(--teal); color: var(--teal-deep); font-size: 14px; border-radius: 4px;
    }
    .form-ok.is-on { display: block; }
    .cta-strip {
      background: var(--dark); color: var(--on-dark); border-radius: 8px; padding: 28px 26px;
      display: grid; gap: 16px; min-height: 100%;
    }
    .cta-strip h3 { color: #fff; font-size: 20px; }
    .cta-strip dl { margin: 0; display: grid; gap: 12px; }
    .cta-strip dt { font-size: 12px; color: var(--on-dark-muted); letter-spacing: .08em; }
    .cta-strip dd { margin: 2px 0 0; font-size: 16px; }
    .cta-strip a { color: var(--on-dark); }
    .cta-strip a:hover { color: var(--orange); }

    /* Footer */
    .site-footer { background: var(--graphite); color: var(--on-dark-muted); padding: 48px 0 0; }
    .foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 32px; padding-bottom: 32px; }
    .site-footer h3 { color: var(--on-dark); font-size: 15px; margin-bottom: 12px; }
    .site-footer p { font-size: 13.5px; max-width: 36em; }
    .foot-links { list-style: none; display: grid; gap: 8px; }
    .foot-links a { color: var(--on-dark-muted); font-size: 14px; min-height: 28px; display: inline-flex; align-items: center; }
    .foot-links a:hover { color: var(--orange); }
    .legal {
      border-top: 1px solid #3a3d44; padding: 16px 0 22px; font-size: 12px;
      display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
    }
    .legal a { color: var(--on-dark-muted); }

    .metal-ph {
      background: repeating-linear-gradient(120deg, #2a2d34 0 10px, #343840 10px 12px, #25282E 12px 22px);
      color: var(--on-dark); display: grid; place-items: center; font-size: 14px; letter-spacing: .12em;
      min-height: 100%;
    }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
    }

    @media (max-width: 1440px) {
      .hero-prev { left: 12px; }
      .hero-next { right: 12px; }
    }
    @media (max-width: 1024px) {
      :root { --space-section: 72px; }
      .nav-links { display: none; }
      .nav-actions .btn { display: none; }
      .burger { display: inline-flex; }
      .intro-grid, .story-grid, .story-main, .contact-grid { grid-template-columns: 1fr; }
      .matrix-grid, .prod-grid { grid-template-columns: 1fr 1fr; }
      .case-grid { grid-template-columns: 1fr 1fr; }
      .case-item.tall { grid-row: auto; min-height: 260px; }
      .timeline { grid-template-columns: 1fr 1fr; gap: 24px 12px; }
      .timeline::before { display: none; }
      .steps { grid-template-columns: 1fr 1fr; gap: 20px; }
      .step:not(:last-child)::after { display: none; }
      .stats-row { grid-template-columns: 1fr 1fr; gap: 20px; }
      .kpi-grid { grid-template-columns: 1fr 1fr; }
      .news-item { grid-template-columns: 140px 1fr; }
      .news-item .badge { display: none; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .slides { min-height: 520px; }
    }
    @media (max-width: 768px) {
      :root { --space-section: 56px; --header-tool: 32px; }
      .toolbar-left span:nth-child(3), .toolbar-marks { display: none; }
      .matrix-grid, .prod-grid, .rev-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .story-side article { grid-template-columns: 1fr; }
      .story-side img { height: 140px; min-height: 140px; }
      .cmp { display: none; }
      .mobile-cmp { display: grid; gap: 10px; }
      .m-row { background: var(--white); border: 1px solid var(--silver); border-radius: 6px; padding: 12px 14px; }
      .m-row h4 { font-size: 14px; margin-bottom: 8px; }
      .m-row p { font-size: 13px; margin: 0 0 4px; color: var(--muted); }
      .m-row b { color: var(--teal-deep); }
      .case-grid { grid-template-columns: 1fr; }
      .news-item { grid-template-columns: 1fr; padding: 0 0 14px; }
      .news-item img { width: 100%; height: 160px; }
      .news-item > div { padding: 0 14px; }
      .timeline { grid-template-columns: 1fr; border-left: 1px solid var(--silver); margin-left: 8px; }
      .ms { padding-left: 20px; }
      .steps { grid-template-columns: 1fr; }
      .foot-grid { grid-template-columns: 1fr; }
      .slide-copy { padding: 48px 0 72px; }
      .slides { min-height: 460px; }
      .hero-arrow { top: auto; bottom: 18px; transform: none; }
      .hero-prev { left: 12px; }
      .hero-next { left: 62px; right: auto; }
      .hero-dots { left: auto; right: 16px; transform: none; bottom: 28px; }
    }
    @media (max-width: 520px) {
      :root { --space-section: 48px; }
      .container { width: min(100% - 24px, var(--container)); }
      .kpi-grid, .stats-row { grid-template-columns: 1fr 1fr; gap: 10px; }
      .kpi-num { font-size: 26px; }
      .stat-item b { font-size: 24px; }
      .slide h1, .slide h2.slide-title { font-size: 24px; }
      .btn { width: auto; }
      .cta-row .btn { flex: 1 1 auto; }
      .logo-text strong { font-size: 16px; }
      .param-row { grid-template-columns: 1fr; gap: 4px; }
    }
    @media (max-width: 375px) {
      .toolbar-inner { gap: 8px; }
      .kpi-tile { padding: 14px 12px; }
      body { font-size: 15px; }
    }