:root {
      color-scheme: light;
      --ink: #15213b;
      --muted: #59677f;
      --blue: #1749c8;
      --blue-dark: #123492;
      --blue-soft: #eaf1ff;
      --cyan: #c9f5f2;
      --coral: #ef735b;
      --paper: #f5f8ff;
      --line: #dce5f4;
      --white: #fff;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; font-size: 17px; }
    .brand img { display: block; width: 38px; max-height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; color: #34425c; font-size: 12px; white-space: nowrap; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--blue); }
    .nav-cta { display: inline-flex; align-items: center; justify-content: center; padding: 10px 15px; border-radius: 5px; color: #fff; background: var(--blue); font-size: 13px; font-weight: 700; white-space: nowrap; }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); padding: 8px 11px; }
    .hero { position: relative; overflow: hidden; padding: 82px 0 44px; background: linear-gradient(135deg, #f7faff 0%, #eaf2ff 55%, #dff5f4 100%); border-bottom: 1px solid #d5e2f5; }
    .hero:before { content: ""; position: absolute; inset: 0; opacity: .48; background-image: linear-gradient(rgba(23,73,200,.055) 1px, transparent 1px), linear-gradient(90deg, rgba(23,73,200,.055) 1px, transparent 1px); background-size: 36px 36px; mask-image: linear-gradient(to bottom, #000, transparent 90%); }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr); align-items: center; gap: 56px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: 0; }
    .eyebrow:before { content: ""; width: 20px; height: 2px; background: var(--coral); }
    h1 { max-width: 690px; margin: 15px 0 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 620px; color: #43516c; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 18px; border: 1px solid transparent; border-radius: 5px; background: var(--blue); color: #fff; font-size: 14px; font-weight: 750; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(23,73,200,.2); background: var(--blue-dark); }
    .button.secondary { background: #fff; color: var(--blue-dark); border-color: #b9c9e9; }
    .hero-visual { position: relative; min-height: 272px; display: grid; align-content: center; justify-items: center; }
    .orbit { width: min(250px, 70vw); aspect-ratio: 1; border: 1px solid rgba(23,73,200,.24); border-radius: 50%; display: grid; place-items: center; position: relative; animation: slow-turn 30s linear infinite; }
    .orbit:before, .orbit:after { content: ""; position: absolute; border: 1px solid rgba(23,73,200,.18); border-radius: 50%; inset: 22px; }
    .orbit:after { inset: 48px; border-color: rgba(23,73,200,.25); }
    .orbit-core { position: relative; z-index: 1; width: 96px; aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 800; box-shadow: 0 12px 34px rgba(23,73,200,.24); animation: counter-turn 30s linear infinite; }
    .orbit-tag { position: absolute; z-index: 2; padding: 6px 10px; border: 1px solid #cfdbef; border-radius: 4px; background: #fff; color: #293956; font-size: 12px; box-shadow: 0 5px 15px rgba(27,50,92,.08); }
    .orbit-tag.one { top: 26px; left: 14px; }
    .orbit-tag.two { top: 72px; right: 0; }
    .orbit-tag.three { right: 17px; bottom: 30px; }
    .orbit-tag.four { left: 2px; bottom: 61px; }
    .hero-note { margin: 22px 0 0; color: var(--muted); font-size: 12px; text-align: center; }
    .metric-strip { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 52px; border-top: 1px solid rgba(41,70,128,.18); }
    .metric { padding: 18px 16px 0; border-right: 1px solid rgba(41,70,128,.18); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--blue-dark); font-size: 20px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding: 68px 0; }
    .section.tint { background: #edf3ff; border-block: 1px solid #dce7f7; }
    .section.dark-band { background: #173b92; color: #fff; }
    .section.dark-band .section-lead, .section.dark-band .eyebrow { color: #d7e4ff; }
    .section-heading { max-width: 720px; margin-bottom: 30px; }
    .section-heading h2 { margin: 8px 0 10px; font-size: clamp(26px, 3vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-lead { margin: 0; color: var(--muted); }
    .split { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 44px; }
    .intro-copy p { margin-top: 0; color: #43516c; }
    .intro-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; margin: 22px 0 0; padding: 0; list-style: none; }
    .intro-points li { padding-left: 19px; position: relative; color: #263651; font-weight: 650; }
    .intro-points li:before { content: ""; position: absolute; left: 0; top: .68em; width: 7px; height: 7px; border-radius: 50%; background: var(--coral); }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; border-top: 1px solid var(--line); }
    .capability-item { padding: 16px 0; border-bottom: 1px solid var(--line); }
    .capability-item h3 { margin: 0 0 5px; font-size: 15px; }
    .capability-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .service-item { min-height: 135px; padding: 17px; border: 1px solid var(--line); border-top: 3px solid var(--blue); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover, .quote:hover, .case:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(31,57,104,.09); }
    .service-item h3 { margin: 0 0 7px; font-size: 15px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
    .workflow article { position: relative; padding: 20px 16px 18px; border-top: 1px solid #9cb2dc; background: rgba(255,255,255,.62); }
    .workflow article:before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 17px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 0 0 6px; font-size: 16px; }
    .workflow p { margin: 0; color: #4c5a74; font-size: 13px; }
    .scenario-table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .scenario-table { width: 100%; min-width: 680px; border-collapse: collapse; }
    .scenario-table th, .scenario-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    .scenario-table th { background: #eaf1ff; color: #183a89; font-size: 13px; }
    .scenario-table td { color: #47556e; font-size: 13px; }
    .scenario-table tr:last-child td { border-bottom: 0; }
    .network { display: flex; flex-wrap: wrap; gap: 9px; }
    .network span { padding: 8px 12px; border: 1px solid #cbd8ef; background: #fff; color: #283957; font-size: 13px; }
    .timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .timeline article { padding-top: 16px; border-top: 2px solid var(--coral); }
    .timeline h3 { margin: 0 0 6px; font-size: 16px; }
    .timeline p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .case { border: 1px solid var(--line); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
    .media-frame { aspect-ratio: 16 / 9; overflow: hidden; background: #e6edf8; }
    .media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 15px; }
    .case-copy h3 { margin: 0 0 5px; font-size: 15px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .score-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; align-items: start; }
    .score-box { padding: 23px; border-left: 4px solid var(--coral); background: #fff; }
    .score-box strong { display: block; color: var(--blue-dark); font-size: 44px; line-height: 1; }
    .stars { color: #da672f; letter-spacing: 0; font-size: 19px; }
    .score-box p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .comparison { width: 100%; min-width: 640px; border-collapse: collapse; }
    .comparison th, .comparison td { padding: 12px 13px; border-bottom: 1px solid var(--line); text-align: left; font-size: 13px; }
    .comparison th { background: #eaf1ff; color: #183a89; }
    .comparison tr:last-child td { border-bottom: 0; }
    .comparison td:first-child { color: var(--ink); font-weight: 700; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-cloud span { padding: 6px 10px; border: 1px solid #cbd8ef; color: #34425c; background: #fff; font-size: 12px; }
    .price-note { padding: 18px 20px; margin-top: 18px; border-left: 3px solid var(--coral); background: #fff; color: #465570; font-size: 14px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 16px 36px 16px 0; cursor: pointer; color: var(--ink); font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary:after { content: "+"; position: absolute; right: 4px; top: 11px; color: var(--blue); font-size: 22px; font-weight: 400; }
    details[open] summary:after { content: "−"; }
    details p { max-width: 850px; margin: -3px 0 17px; color: var(--muted); font-size: 14px; }
    .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .quote { padding: 17px; border: 1px solid var(--line); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
    .quote p { margin: 0 0 16px; color: #3e4d67; font-size: 14px; }
    .quote strong { display: block; font-size: 13px; }
    .quote span { color: var(--muted); font-size: 12px; }
    .article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; border-top: 1px solid var(--line); }
    .article-list a { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); color: #263651; font-size: 14px; }
    .article-list a:hover { color: var(--blue); }
    .article-list span { color: var(--muted); white-space: nowrap; font-size: 12px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: start; gap: 36px; }
    .contact-details { display: grid; gap: 13px; color: #43516c; font-size: 14px; }
    .contact-details strong { color: var(--ink); }
    .contact-qr { width: 142px; padding: 7px; border: 1px solid var(--line); background: #fff; }
    .contact-qr img { display: block; width: 100%; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #31405b; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid #ccd7e8; border-radius: 4px; background: #fff; color: var(--ink); outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(23,73,200,.1); }
    .field textarea { min-height: 118px; resize: vertical; }
    .form-note { margin: 9px 0 0; color: var(--muted); font-size: 12px; }
    .footer { padding: 28px 0; background: #e8effa; color: #263651; border-top: 1px solid #d3deef; }
    .footer-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
    .footer p { margin: 3px 0; color: #52617b; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 620px; }
    .footer-links a { color: #314b82; font-size: 12px; }
    .footer-links a:hover { color: var(--blue); text-decoration: underline; }
    .float-contact { position: fixed; right: 16px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .float-contact a, .to-top { display: grid; place-items: center; min-width: 46px; min-height: 42px; padding: 8px; border: 1px solid #c4d3ee; border-radius: 5px; background: #fff; color: var(--blue-dark); box-shadow: 0 5px 18px rgba(23,48,98,.12); font-size: 12px; font-weight: 750; }
    .to-top { cursor: pointer; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes slow-turn { to { transform: rotate(360deg); } }
    @keyframes counter-turn { to { transform: rotate(-360deg); } }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 12px 20px 18px; border-bottom: 1px solid var(--line); background: #fff; align-items: stretch; justify-content: flex-start; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 9px 10px; }
      .menu-toggle { display: inline-flex; }
      .nav-cta { margin-left: auto; }
      .hero-inner { gap: 26px; }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; gap: 10px; }
      .brand { font-size: 15px; }
      .brand img { width: 32px; max-height: 32px; }
      .nav-links { top: 64px; }
      .nav-cta { padding: 9px 11px; font-size: 12px; }
      .hero { padding: 55px 0 28px; }
      .hero-inner { grid-template-columns: 1fr; gap: 18px; }
      .hero-visual { min-height: 218px; }
      .orbit { width: 205px; }
      .metric-strip { grid-template-columns: 1fr 1fr; margin-top: 28px; }
      .metric { padding: 13px 8px; border-right: 0; border-bottom: 1px solid rgba(41,70,128,.18); }
      .metric:nth-child(odd) { border-right: 1px solid rgba(41,70,128,.18); }
      .section { padding: 50px 0; }
      .split, .score-layout, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
      .service-grid, .quotes { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 12px; }
      .timeline { grid-template-columns: 1fr; gap: 16px; }
      .case-grid { grid-template-columns: 1fr 1fr; }
      .footer-row { flex-direction: column; }
    }
    @media (max-width: 460px) {
      h1 { font-size: 38px; }
      .hero-copy { font-size: 15px; }
      .service-grid, .quotes, .case-grid, .article-list, .capability-list { grid-template-columns: 1fr; }
      .intro-points { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .float-contact { right: 8px; bottom: 10px; }
      .float-contact a, .to-top { min-width: 40px; min-height: 38px; font-size: 11px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }