:root {
      --bg: #f5f7fa;
      --bg-2: #ffffff;
      --text: #121820;
      --muted: #66717f;
      --muted-2: #8a96a5;
      --line: rgba(18,24,32,.12);
      --line-strong: rgba(18,24,32,.18);
      --card: rgba(255,255,255,.78);
      --card-solid: #ffffff;
      --panel: #eaf0f6;
      --accent: #1976a2;
      --accent-2: #54b8cf;
      --revision: #e2a429;
      --good: #23906f;
      --danger: #c95d48;
      --shadow: 0 24px 70px rgba(18, 24, 32, .10);
      --shadow-soft: 0 16px 40px rgba(18, 24, 32, .07);
      --radius-xl: 30px;
      --radius-lg: 22px;
      --header-bg: rgba(245,247,250,.76);
      --grid: rgba(18,24,32,.055);
      --blueprint-bg: #101823;
      --blueprint-line: rgba(84,184,207,.24);
      --blueprint-text: rgba(255,255,255,.78);
    }

    html[data-theme="dark"] {
      --bg: #080d13;
      --bg-2: #0d141d;
      --text: #eef4fb;
      --muted: #a4afbd;
      --muted-2: #718094;
      --line: rgba(238,244,251,.12);
      --line-strong: rgba(238,244,251,.20);
      --card: rgba(18,27,38,.74);
      --card-solid: #101823;
      --panel: #121d2a;
      --accent: #58bdd5;
      --accent-2: #82d9e8;
      --revision: #f0b43c;
      --good: #55c9a2;
      --danger: #ef7f68;
      --shadow: 0 24px 80px rgba(0,0,0,.36);
      --shadow-soft: 0 16px 44px rgba(0,0,0,.24);
      --header-bg: rgba(8,13,19,.70);
      --grid: rgba(238,244,251,.055);
      --blueprint-bg: #0b1119;
      --blueprint-line: rgba(88,189,213,.26);
      --blueprint-text: rgba(238,244,251,.84);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--text);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      line-height: 1.5;
      background:
        linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px),
        radial-gradient(circle at 84% 4%, rgba(84,184,207,.18), transparent 28rem),
        radial-gradient(circle at 8% 20%, rgba(226,164,41,.10), transparent 25rem),
        var(--bg);
      background-size: 42px 42px, 42px 42px, auto, auto, auto;
    }
    a { color: inherit; text-decoration: none; }
    a:focus-visible,
    button:focus-visible {
      outline: 3px solid var(--accent-2);
      outline-offset: 4px;
    }
    .wrap { width: min(1160px, calc(100% - 44px)); margin: 0 auto; }
    .skip { position: absolute; left: -999px; }
    .skip:focus { left: 18px; top: 18px; z-index: 99; background: var(--card-solid); padding: 10px 12px; border-radius: 12px; border: 1px solid var(--line); }

    .top-strip { border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; }
    .top-strip .wrap { min-height: 36px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .top-strip b { color: var(--text); }

    header { position: sticky; top: 0; z-index: 30; backdrop-filter: blur(18px); background: var(--header-bg); border-bottom: 1px solid var(--line); }
    .nav { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: flex; align-items: center; gap: 14px; min-width: 250px; }
    .brand img { width: 100px; height: auto; display: block; background: transparent; }
    html[data-theme="dark"] .brand-logo-dark, html[data-theme="light"] .brand-logo-white { display: none; }
    .brand-sub { font-size: 12px; color: var(--muted); font-weight: 650; letter-spacing: .06em; text-transform: uppercase; display: none; }
    .navlinks { display: flex; align-items: center; gap: 20px; color: var(--muted); font-size: 13px; font-weight: 720; }
    .navlinks a:hover { color: var(--text); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .lang { display: inline-flex; align-items: center; gap: 4px; padding: 5px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); }
    .lang a { font-size: 12px; font-weight: 800; color: var(--muted); padding: 7px 9px; border-radius: 999px; }
    .lang .active { color: #fff; background: var(--text); }
    html[data-theme="dark"] .lang .active { color: #081016; background: var(--accent-2); }

    .theme-switch { display: inline-flex; align-items: center; gap: 4px; padding: 5px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); }
    .theme-switch button { border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 12px; font-weight: 800; padding: 7px 9px; border-radius: 999px; cursor: pointer; }
    html[data-mode="auto"] .theme-switch [data-mode="auto"],
    html[data-mode="light"] .theme-switch [data-mode="light"],
    html[data-mode="dark"] .theme-switch [data-mode="dark"] { background: var(--text); color: var(--bg-2); }
    html[data-theme="dark"][data-mode="auto"] .theme-switch [data-mode="auto"],
    html[data-theme="dark"][data-mode="light"] .theme-switch [data-mode="light"],
    html[data-theme="dark"][data-mode="dark"] .theme-switch [data-mode="dark"] { background: var(--accent-2); color: #081016; }

    .btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: 999px; padding: 13px 18px; font-weight: 820; font-size: 14px; letter-spacing: -.01em; background: var(--text); color: var(--bg-2); box-shadow: var(--shadow-soft); white-space: nowrap; }
    html[data-theme="dark"] .btn { background: var(--accent-2); color: #081016; }
    .btn.ghost { background: transparent; color: var(--text); border-color: var(--line-strong); box-shadow: none; }
    .btn.accent { background: var(--accent); color: #fff; }
    html[data-theme="dark"] .btn.accent { color: #071017; background: var(--accent-2); }
    .btn:hover { transform: translateY(-1px); }

    .hero { padding: 82px 0 56px; display: grid; grid-template-columns: 1.02fr .98fr; gap: 48px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--muted); background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; font-size: 13px; font-weight: 820; }
    .pulse { width: 8px; height: 8px; border-radius: 99px; background: var(--accent); box-shadow: 0 0 0 6px rgba(84,184,207,.13); }
    h1 { margin: 22px 0 20px; font-size: clamp(42px, 7vw, 80px); line-height: .92; letter-spacing: -.075em; color: var(--text); }
    h1 span { color: var(--accent); }
    .lead { margin: 0; font-size: 19px; line-height: 1.65; color: var(--muted); max-width: 660px; }
    .micro-slogan { margin-top: 22px; display: inline-flex; flex-wrap: wrap; gap: 8px; align-items: center; font-weight: 860; }
    .micro-slogan span { padding: 8px 10px; border-radius: 12px; border: 1px solid var(--line); background: var(--card); color: var(--text); }
    .micro-slogan .rev { color: #372603; background: rgba(226,164,41,.22); border-color: rgba(226,164,41,.34); }
    html[data-theme="dark"] .micro-slogan .rev { color: #f9db8d; }
    .hero-actions { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-meta { margin-top: 28px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .meta-box { border: 1px solid var(--line); background: var(--card); border-radius: 18px; padding: 14px; }
    .meta-box b { display: block; font-size: 18px; letter-spacing: -.04em; }
    .meta-box span { color: var(--muted); font-size: 12px; font-weight: 700; }

    .qto-visual { position: relative; border: 1px solid var(--line-strong); border-radius: 34px; background: var(--blueprint-bg); box-shadow: var(--shadow); overflow: hidden; color: var(--blueprint-text); }
    .qto-visual:before { content: ""; position: absolute; inset: 0; background: linear-gradient(var(--blueprint-line) 1px, transparent 1px), linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px); background-size: 34px 34px; mask-image: linear-gradient(to bottom, black, transparent 90%); opacity: .85; }
    .visual-inner { position: relative; padding: 22px; }
    .visual-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
    .visual-top strong { font-size: 14px; color: #fff; letter-spacing: -.01em; }
    .status { display: inline-flex; align-items: center; gap: 7px; color: #0c1820; background: var(--accent-2); border-radius: 999px; padding: 7px 10px; font-size: 11px; font-weight: 900; }
    .status i { width: 7px; height: 7px; border-radius: 20px; background: #0c1820; }
    .sheet { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: 24px; overflow: hidden; backdrop-filter: blur(4px); }
    .sheet-row { display: grid; grid-template-columns: 1.1fr .65fr .65fr .7fr; gap: 1px; border-bottom: 1px solid rgba(255,255,255,.09); }
    .sheet-row:last-child { border-bottom: 0; }
    .sheet-cell { padding: 13px 12px; font-size: 12px; font-weight: 730; color: rgba(255,255,255,.70); }
    .sheet-head .sheet-cell { color: rgba(255,255,255,.48); text-transform: uppercase; font-size: 10px; letter-spacing: .08em; background: rgba(255,255,255,.055); }
    .qty-plus { color: #9be9d0; } .qty-minus { color: #ffb1a4; } .qty-rev { color: #ffd978; }
    .change-log { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
    .log-card { border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.065); border-radius: 20px; padding: 16px; }
    .log-card small { display: block; color: rgba(255,255,255,.48); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 10px; }
    .log-card b { display: block; color: #fff; font-size: 26px; line-height: 1; letter-spacing: -.06em; }
    .log-card span { display: block; margin-top: 6px; color: rgba(255,255,255,.62); font-size: 12px; }

    section { padding: 74px 0; }
    .section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
    .section-head h2 { margin: 0; max-width: 760px; color: var(--text); font-size: clamp(32px, 5vw, 56px); line-height: 1; letter-spacing: -.065em; }
    .section-head p { margin: 0 0 4px; color: var(--muted); max-width: 390px; }

    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-card { position: relative; min-height: 310px; padding: 24px; border-radius: var(--radius-lg); border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow-soft); overflow: hidden; }
    .service-card:before { content:""; position:absolute; left:0; top:0; right:0; height:3px; background: linear-gradient(90deg, var(--accent), transparent); opacity:.9; }
    .service-code { display: inline-flex; min-width: 44px; height: 36px; align-items: center; justify-content: center; border-radius: 12px; background: var(--panel); color: var(--accent); font-size: 12px; font-weight: 950; margin-bottom: 42px; border: 1px solid var(--line); }
    .service-card h3 { margin: 0 0 12px; font-size: 24px; line-height: 1.05; letter-spacing: -.05em; }
    .service-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-card ul { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 8px; color: var(--muted); font-size: 13px; font-weight: 720; }
    .service-card li:before { content:""; display:inline-block; width:6px; height:6px; border-radius:20px; background: var(--accent); margin-right:8px; vertical-align:1px; }
    .service-card.revision:before { background: linear-gradient(90deg, var(--revision), transparent); }
    .service-card.revision .service-code { color: var(--revision); }
    .service-card.supply:before { background: linear-gradient(90deg, var(--muted-2), transparent); }

    .change-section { background: linear-gradient(135deg, var(--card-solid), var(--panel)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    html[data-theme="dark"] .change-section { background: linear-gradient(135deg, #0b1119, #121d2a); }
    .change-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 22px; align-items: stretch; }
    .change-copy { padding: 30px; border-radius: var(--radius-xl); border: 1px solid var(--line); background: var(--card); }
    .change-copy .eyebrow + h2, .about-card .eyebrow + h2 { margin-top: 22px; }
    .change-copy h2 { margin: 0 0 16px; font-size: clamp(32px, 4.8vw, 54px); line-height: 1; letter-spacing: -.065em; }
    .change-copy p { margin: 0 0 20px; color: var(--muted); font-size: 16px; line-height: 1.7; }
    .change-list { display: grid; gap: 10px; }
    .change-item { display: flex; justify-content: space-between; gap: 14px; align-items: center; border: 1px solid var(--line); background: var(--card-solid); border-radius: 16px; padding: 12px 14px; font-weight: 800; }
    .change-item span { color: var(--muted); font-size: 13px; font-weight: 700; }
    .change-item b { color: var(--revision); }
    .revision-board { border-radius: var(--radius-xl); border: 1px solid var(--line); background: var(--card-solid); box-shadow: var(--shadow-soft); overflow: hidden; }
    .board-title { padding: 18px 20px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
    .board-title b { letter-spacing: -.02em; }
    .board-title span { color: var(--muted); font-size: 12px; font-weight: 800; }
    .board-rows { display: grid; }
    .board-row { display: grid; grid-template-columns: 1fr .7fr .7fr; gap: 0; border-bottom: 1px solid var(--line); }
    .board-row:last-child { border-bottom: 0; }
    .board-row div { padding: 16px 18px; border-right: 1px solid var(--line); font-weight: 760; color: var(--muted); }
    .board-row div:last-child { border-right: 0; }
    .board-row.head div { color: var(--muted-2); text-transform: uppercase; font-size: 11px; letter-spacing: .08em; background: var(--panel); }
    .delta-plus { color: var(--good) !important; } .delta-minus { color: var(--danger) !important; } .delta-rfi { color: var(--revision) !important; }

    .deliverables { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .deliverable { display: grid; grid-template-columns: 52px 1fr; gap: 14px; align-items: start; padding: 18px; border: 1px solid var(--line); background: var(--card); border-radius: 20px; }
    .badge { width:52px; height:52px; border:1px solid var(--line); border-radius: 16px; display:grid; place-items:center; background: var(--panel); color: var(--accent); font-size: 12px; font-weight: 950; }
    .deliverable b { display:block; margin-bottom:5px; color:var(--text); letter-spacing:-.02em; }
    .deliverable span { color:var(--muted); font-size:14px; }

    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; counter-reset: step; }
    .step { counter-increment: step; min-height: 215px; padding: 20px; border: 1px solid var(--line); background: var(--card); border-radius: 22px; }
    .step:before { content: "0" counter(step); display: inline-flex; align-items:center; justify-content:center; width:44px; height:38px; border-radius: 12px; background: var(--text); color: var(--bg-2); font-weight: 950; margin-bottom: 44px; }
    html[data-theme="dark"] .step:before { background: var(--accent-2); color:#081016; }
    .step h3 { margin: 0 0 9px; font-size: 18px; letter-spacing: -.04em; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }

    .about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 18px; align-items: stretch; }
    .about-card, .contact-card, .ee-card { border: 1px solid var(--line); background: var(--card); border-radius: var(--radius-xl); padding: 28px; box-shadow: var(--shadow-soft); }
    .about-card h2, .contact-card h2, .ee-card h2 { margin: 0 0 16px; font-size: clamp(30px, 4vw, 48px); line-height: 1; letter-spacing: -.06em; }
    .about-card p, .contact-card p, .ee-card p { color: var(--muted); margin: 0 0 14px; }
    .detail-grid { display: grid; gap: 8px; margin-top: 18px; }
    @media (min-width: 1061px) { .contact-card .detail-grid { margin-top: 92px; } }
    .detail { display: grid; grid-template-columns: 130px 1fr; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--line); }
    .detail:last-child { border-bottom:0; }
    .detail span { color: var(--muted-2); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; font-weight: 850; }
    .detail b { font-size: 14px; }
    .contact-box { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 18px; }
    .contact-mini { padding: 18px; border: 1px solid var(--line); border-radius: 20px; background: var(--card-solid); }
    .contact-mini small { display:block; color:var(--muted-2); text-transform:uppercase; letter-spacing:.08em; font-weight:900; margin-bottom:8px; }
    .contact-mini b { word-break: break-word; }

    .ee-card { margin-top: 18px; box-shadow: none; }
    .ee-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 8px; margin-top: 16px; }
    .ee-list div { padding: 11px 12px; border: 1px solid var(--line); border-radius: 14px; color: var(--muted); font-weight: 750; background: var(--card-solid); }

    footer { border-top: 1px solid var(--line); padding: 36px 0; color: var(--muted); font-size: 13px; }
    footer .wrap { display:flex; justify-content:space-between; gap:20px; align-items:center; }
    footer b { color: var(--text); }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      .btn:hover { transform: none; }
    }

    @media (max-width: 1060px) {
      .hero, .change-layout, .about-grid { grid-template-columns: 1fr; }
      .service-grid, .workflow { grid-template-columns: repeat(2, 1fr); }
      .navlinks { display:none; }
      .brand img { width: 96px; height: auto; }
    }
    @media (max-width: 720px) {
      .wrap { width: min(100% - 28px, 1160px); }
      .top-strip .wrap { flex-direction: column; align-items: flex-start; padding: 10px 0; gap: 4px; }
      .top-strip span:last-child { display:none; }
      .nav { min-height: 70px; gap: 12px; }
      .brand { min-width: 0; }
      .brand img { width: 94px; height: auto; }
      .lang { display:none; }
      .theme-switch button { padding: 7px 8px; }
      .nav-actions .btn { display:none; }
      .hero { padding: 48px 0 32px; gap: 30px; }
      h1 { font-size: 43px; }
      .lead { font-size: 16px; }
      .hero-meta, .service-grid, .deliverables, .workflow, .contact-box, .ee-list { grid-template-columns: 1fr; }
      .section-head { align-items: flex-start; flex-direction: column; }
      section { padding: 52px 0; }
      .qto-visual, .change-copy, .revision-board, .about-card, .contact-card, .ee-card { border-radius: 24px; }
      .sheet-row { grid-template-columns: 1fr .55fr .55fr; }
      .sheet-row .sheet-cell:nth-child(4) { display:none; }
      .change-log { grid-template-columns: 1fr; }
      .board-row { grid-template-columns: 1fr .65fr; }
      .board-row div:nth-child(2) { display:none; }
      .detail { grid-template-columns: 1fr; gap: 3px; }
      footer .wrap { flex-direction: column; align-items: flex-start; }
    }