:root {
      color-scheme: light;
      --ink: #14243b;
      --muted: #5c6b7d;
      --blue: #1248b8;
      --blue-deep: #0c347f;
      --cyan: #18a7c9;
      --paper: #f5f8fc;
      --line: #dce5f0;
      --white: #fff;
      --green: #24785c;
      --shadow: 0 14px 36px rgba(26, 58, 105, .08);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: -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; }
    img { display: block; 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,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-inner { 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; }
    .brand img { width: 40px; max-height: 42px; object-fit: contain; }
    .brand-name { font-size: 17px; font-weight: 760; letter-spacing: 0; color: var(--blue-deep); }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 8px; color: #40516a; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-links .nav-cta { margin-left: 8px; padding: 10px 15px; color: #fff; background: var(--blue); border-radius: 4px; font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); padding: 8px 11px; border-radius: 4px; cursor: pointer; }
    .hero {
      position: relative; overflow: hidden; color: white;
      background: linear-gradient(120deg, #0b347f 0%, #1050bd 54%, #087eaa 100%);
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(255,255,255,.16); transform: rotate(24deg); }
    .hero::before { width: 450px; height: 450px; right: -90px; top: -190px; border-radius: 38%; }
    .hero::after { width: 300px; height: 300px; right: 135px; bottom: -215px; border-radius: 50%; }
    .hero-inner { position: relative; z-index: 1; padding-block: 76px 52px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { margin: 0 0 14px; color: #a9e8fa; font-size: 13px; font-weight: 700; letter-spacing: 1px; }
    h1 { margin: 0; max-width: 700px; font-size: clamp(34px, 5vw, 56px); line-height: 1.16; letter-spacing: 0; }
    .hero-copy > p { max-width: 660px; margin: 20px 0 0; color: #e0edff; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
    .button { display: inline-flex; justify-content: center; align-items: center; min-height: 46px; padding: 11px 19px; border: 1px solid transparent; border-radius: 4px; font-weight: 750; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(9,35,82,.2); }
    .button-primary { color: var(--blue-deep); background: white; }
    .button-ghost { color: white; border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.08); }
    .hero-note { margin-top: 16px; color: #d2e5ff; font-size: 13px; }
    .metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 52px; border-top: 1px solid rgba(255,255,255,.22); }
    .metric { padding: 20px 15px 0 0; }
    .metric strong { display: block; font-size: 20px; color: white; }
    .metric span { color: #d1e4ff; font-size: 13px; }
    main { overflow: hidden; }
    .section { padding-block: 68px; }
    .section-tint { background: #edf3fa; border-block: 1px solid #e3eaf3; }
    .section-heading { max-width: 730px; margin-bottom: 28px; }
    .kicker { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    h2 { margin: 7px 0 0; font-size: 30px; line-height: 1.25; letter-spacing: 0; }
    .section-heading p { margin: 12px 0 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: start; }
    .intro-copy p { margin: 0 0 14px; color: #40516a; }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 20px; margin: 22px 0 0; padding: 0; list-style: none; }
    .feature-list li { padding-left: 17px; position: relative; color: #31445d; font-weight: 650; }
    .feature-list li::before { content: ""; position: absolute; width: 6px; height: 6px; left: 0; top: .68em; background: var(--cyan); border-radius: 50%; }
    .intro-aside { padding: 24px; border-left: 3px solid var(--cyan); background: white; box-shadow: var(--shadow); }
    .intro-aside h3 { margin: 0 0 10px; font-size: 17px; }
    .intro-aside p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { min-width: 0; padding: 20px; background: white; border: 1px solid var(--line); border-radius: 5px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
    .service-item:hover { transform: translateY(-3px); border-color: #a9c5ed; box-shadow: var(--shadow); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-tag { display: inline-block; margin-bottom: 10px; color: var(--blue); font-size: 11px; font-weight: 800; }
    .model-band { margin-top: 24px; padding: 20px 22px; background: #e8f3f8; border-left: 3px solid var(--cyan); }
    .model-band strong { display: block; margin-bottom: 8px; }
    .model-band p { margin: 0; color: #40516a; font-size: 14px; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 13px; }
    .tag-list span { padding: 5px 9px; border: 1px solid #cbd9e8; background: white; color: #344860; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
    .workflow article { padding: 20px 18px; border-top: 2px solid var(--blue); background: white; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 15px; color: var(--cyan); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 0 0 7px; font-size: 16px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .network-grid article { padding-top: 17px; border-top: 1px solid #a9bdd3; }
    .network-grid h3 { margin: 0 0 7px; font-size: 17px; }
    .network-grid p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
    .case-feature { padding: 25px; background: var(--blue-deep); color: white; }
    .case-feature h3 { margin: 0 0 10px; font-size: 21px; }
    .case-feature p { margin: 0; color: #d6e5ff; }
    .case-side { display: grid; gap: 12px; }
    .case-note { padding: 17px 19px; background: white; border: 1px solid var(--line); }
    .case-note strong { display: block; margin-bottom: 4px; }
    .case-note span { color: var(--muted); font-size: 14px; }
    .media-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 20px; }
    .media-grid figure { margin: 0; background: white; border: 1px solid var(--line); }
    .media-grid img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: #edf2f7; }
    .media-grid figcaption { padding: 10px 12px; color: #40516a; font-size: 13px; }
    .score-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 28px; align-items: start; }
    .score-panel { padding: 24px; color: white; background: var(--blue); }
    .score-panel .stars { color: #ffe49a; font-size: 23px; letter-spacing: 2px; }
    .score-panel strong { display: block; margin-top: 10px; font-size: 42px; line-height: 1; }
    .score-panel p { margin: 9px 0 0; color: #e2edff; }
    .table-wrap { overflow-x: auto; background: white; border: 1px solid var(--line); }
    table { width: 100%; border-collapse: collapse; min-width: 620px; text-align: left; }
    th, td { padding: 13px 14px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 13px; }
    th { background: #eaf1f9; color: #263c58; font-weight: 750; }
    td { color: #45566d; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 19px; border: 1px solid var(--line); background: white; }
    .review blockquote { margin: 0; color: #34465e; font-size: 14px; }
    .review footer { margin-top: 14px; color: var(--blue); font-size: 12px; font-weight: 750; }
    .offer-row { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
    .offer-row p { color: var(--muted); }
    .price-note { padding: 21px; border: 1px solid #bfd4e8; background: white; }
    .price-note strong { display: block; margin-bottom: 7px; }
    .price-note p { margin: 0; font-size: 14px; }
    .faq-list { border-top: 1px solid #cbd7e4; }
    .faq-list details { border-bottom: 1px solid #cbd7e4; }
    .faq-list summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 5px; top: 13px; color: var(--blue); font-size: 22px; font-weight: 400; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { max-width: 820px; margin: -3px 0 17px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-list a { display: block; min-height: 88px; padding: 15px; border: 1px solid var(--line); background: white; transition: border-color .2s ease, transform .2s ease; }
    .article-list a:hover { transform: translateY(-2px); border-color: #9cbce5; }
    .article-list strong { display: block; margin-bottom: 5px; color: var(--blue); font-size: 13px; }
    .article-list span { color: var(--muted); font-size: 12px; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 32px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-details { display: grid; gap: 9px; margin-top: 18px; }
    .contact-details a, .contact-details span { color: #284360; font-size: 14px; }
    .qr-frame { width: 148px; margin-top: 18px; padding: 8px; border: 1px solid var(--line); background: white; }
    .qr-frame img { width: 100%; height: auto; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; padding: 22px; background: white; border: 1px solid var(--line); }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { color: #354963; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid #cbd6e2; border-radius: 3px; color: var(--ink); background: white; }
    .field textarea { min-height: 110px; resize: vertical; }
    .contact-form .button { grid-column: 1 / -1; justify-self: start; color: white; background: var(--blue); cursor: pointer; }
    .form-note { grid-column: 1 / -1; margin: -6px 0 0; color: var(--muted); font-size: 12px; }
    .footer-main { padding-block: 28px; background: #e8eef6; border-top: 1px solid var(--line); }
    .footer-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 26px; }
    .footer-brand { font-weight: 800; color: var(--blue-deep); }
    .footer-row p { max-width: 470px; margin: 5px 0 0; color: #53647a; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 520px; }
    .footer-links a { color: #344c68; font-size: 13px; }
    .copyright { padding-block: 12px; color: #53647a; background: #e8eef6; font-size: 12px; border-top: 1px solid #d7e0eb; }
    .float-help { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-help a { display: block; padding: 10px 13px; color: white; background: var(--blue); border-radius: 4px; box-shadow: 0 6px 18px rgba(16,54,111,.2); font-size: 13px; font-weight: 700; }
    .float-help a + a { color: var(--blue-deep); background: white; border: 1px solid var(--line); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .header-inner { min-height: 66px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; padding: 12px 20px 16px; background: white; border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px rgba(18,45,80,.08); }
      .nav-links.is-open { display: flex; justify-content: flex-start; }
      .nav-links a { padding: 9px 12px; }
      .nav-links .nav-cta { margin-left: 4px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero-inner { padding-block: 55px 36px; }
      .hero-copy > p { font-size: 15px; }
      .metric-strip { grid-template-columns: repeat(2, 1fr); row-gap: 18px; margin-top: 36px; }
      .metric { padding-top: 14px; }
      .section { padding-block: 50px; }
      h2 { font-size: 25px; }
      .intro-grid, .score-layout, .case-grid, .offer-row, .contact-grid { grid-template-columns: 1fr; }
      .feature-list { grid-template-columns: 1fr; }
      .service-grid, .network-grid, .reviews { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); }
      .media-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: repeat(2, 1fr); }
      .contact-form { grid-template-columns: 1fr; padding: 17px; }
      .field-full, .contact-form .button, .form-note { grid-column: 1; }
      .footer-row { flex-direction: column; }
      .float-help { right: 10px; bottom: 12px; }
      .float-help a { padding: 9px 11px; }
    }