:root {
      color-scheme: light;
      --ink: #1d2824;
      --muted: #5e6b64;
      --paper: #f7f8f5;
      --white: #fff;
      --line: #dce3dd;
      --green: #145b44;
      --lime: #d9f45a;
      --coral: #f36e4f;
      --blue: #dcecf3;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    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(247, 248, 245, .96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; text-decoration: none; font-weight: 800; }
    .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; }
    .nav-links a { padding: 8px 7px; color: #425149; text-decoration: none; font-size: 12px; white-space: nowrap; }
    .nav-links a:hover { color: var(--green); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 10px 18px;
      border: 1px solid var(--green);
      border-radius: 4px;
      background: var(--green);
      color: #fff;
      font-weight: 700;
      text-decoration: none;
      transition: transform .18s ease, background .18s ease;
    }
    .nav-cta { flex: 0 0 auto; min-height: 38px; padding: 7px 13px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: #0d4835; }
    .button-light { background: var(--lime); color: var(--ink); border-color: var(--lime); }
    .button-light:hover { background: #e7ff79; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); color: var(--ink); border-radius: 4px; padding: 8px 11px; }
    .hero { position: relative; overflow: hidden; padding: 82px 0 54px; background: var(--green); color: #fff; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; }
    .hero::before { width: 240px; height: 240px; right: 7%; top: 24px; border: 1px solid rgba(217,244,90,.5); transform: rotate(45deg); }
    .hero::after { width: 130px; height: 130px; right: 19%; top: 90px; background: var(--coral); clip-path: polygon(50% 0, 100% 100%, 0 100%); opacity: .95; }
    .hero-inner { position: relative; z-index: 1; max-width: 760px; }
    .eyebrow { margin: 0 0 12px; color: var(--lime); font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    h1 { max-width: 690px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.1; }
    .hero-copy { max-width: 620px; margin: 20px 0 26px; color: #e1eee7; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin: 22px 0 0; color: #d7e7de; font-size: 13px; }
    .hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 54px; background: rgba(255,255,255,.24); border: 1px solid rgba(255,255,255,.24); }
    .hero-stat { padding: 18px; background: rgba(20,91,68,.92); }
    .hero-stat strong { display: block; color: var(--lime); font-size: 21px; }
    .hero-stat span { color: #e1eee7; font-size: 13px; }
    main { overflow: hidden; }
    section.content-section { padding: 66px 0; border-bottom: 1px solid var(--line); }
    .section-head { max-width: 740px; margin-bottom: 28px; }
    .kicker { margin: 0 0 7px; color: #a6442e; font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 40px); line-height: 1.2; }
    .section-head p:last-child { margin: 12px 0 0; color: var(--muted); }
    .intro-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 36px; align-items: start; }
    .intro-copy p { margin: 0 0 14px; color: var(--muted); }
    .signal-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 20px; padding: 0; margin: 20px 0 0; list-style: none; }
    .signal-list li { padding: 10px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .signal-list li::before { content: "↗"; margin-right: 9px; color: var(--coral); }
    .asset-panel { padding: 23px; background: var(--lime); border-left: 6px solid var(--coral); }
    .asset-panel h3 { margin: 0 0 10px; font-size: 20px; }
    .asset-panel p { margin: 0; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
    .step { padding-top: 14px; border-top: 3px solid var(--green); }
    .step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 12px; color: var(--coral); font-size: 14px; font-weight: 800; }
    .step h3 { margin: 0 0 7px; font-size: 18px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .service-item { min-height: 150px; padding: 19px; background: var(--white); border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(24,55,40,.08); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .split-band { background: var(--blue); }
    .band-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
    .band-grid p { color: #40545b; }
    .asset-visual { padding: 18px; background: var(--white); border: 1px solid #c9dce4; }
    .asset-visual img { display: block; width: 100%; }
    .image-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .image-pair img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: contain; background: var(--white); border: 1px solid var(--line); }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); }
    table { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #eaf1e9; font-size: 13px; }
    td { color: #48574f; font-size: 14px; }
    .score-band { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px; margin-bottom: 18px; background: var(--green); color: #fff; }
    .score-band strong { color: var(--lime); font-size: 26px; }
    .score-band span { font-size: 14px; }
    .case-grid, .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .case-item, .review-item { padding: 19px; background: var(--white); border-top: 3px solid var(--coral); }
    .case-item h3, .review-item h3 { margin: 0 0 8px; font-size: 17px; }
    .case-item p, .review-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .review-item footer { margin-top: 13px; color: var(--green); font-size: 13px; font-weight: 700; }
    .network { display: flex; flex-wrap: wrap; gap: 8px; }
    .network span { padding: 7px 10px; border: 1px solid #b9c9bf; color: #31483d; font-size: 13px; }
    .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; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 13px; color: var(--coral); font-size: 22px; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 800px; margin: 0; padding: 0 32px 17px 0; color: var(--muted); }
    .article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 28px; }
    .article-list a { display: flex; justify-content: space-between; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
    .article-list a:hover { color: var(--green); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 11px 12px; border: 1px solid #bcc9c0; border-radius: 3px; background: #fff; color: var(--ink); }
    textarea { min-height: 120px; resize: vertical; }
    .form-submit { margin-top: 16px; cursor: pointer; }
    .contact-grid { display: grid; grid-template-columns: 1fr 220px; gap: 28px; align-items: start; }
    .qr { width: 180px; padding: 8px; background: #fff; border: 1px solid var(--line); }
    .qr img { display: block; width: 100%; }
    .contact-lines p { margin: 7px 0; color: var(--muted); }
    .link-cloud { display: flex; flex-wrap: wrap; gap: 10px 18px; }
    .link-cloud a { color: var(--green); font-size: 14px; }
    .site-footer { padding: 24px 0; background: #e8eee9; color: #263a30; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .footer-row p { margin: 0; font-size: 13px; }
    .footer-row a { color: #145b44; }
    .floating-contact, .to-top { position: fixed; right: 18px; z-index: 15; width: 46px; height: 46px; border: 0; border-radius: 50%; background: var(--coral); color: #fff; font-weight: 800; cursor: pointer; box-shadow: 0 5px 16px rgba(29,40,36,.18); }
    .floating-contact { bottom: 78px; }
    .to-top { bottom: 20px; display: none; background: var(--green); }
    .floating-contact a { display: grid; width: 100%; height: 100%; place-items: center; color: #fff; text-decoration: none; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (max-width: 1050px) {
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-row { flex-wrap: wrap; padding: 12px 0; }
      .nav-links { display: none; order: 3; flex: 1 0 100%; justify-content: flex-start; flex-wrap: wrap; padding-top: 8px; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .nav-cta { margin-left: auto; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .hero { padding: 58px 0 34px; }
      .hero::before { right: -115px; top: 135px; }
      .hero::after { right: 28px; top: 176px; width: 72px; height: 72px; opacity: .65; }
      .hero-inner { max-width: 580px; }
      .hero-copy { max-width: 480px; font-size: 15px; }
      .hero-stats { margin-top: 38px; }
      .hero-stat { padding: 13px 10px; }
      .hero-stat strong { font-size: 17px; }
      .hero-stat span { font-size: 11px; }
      section.content-section { padding: 48px 0; }
      .intro-layout, .band-grid, .contact-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(2, 1fr); }
      .service-grid, .case-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
      .qr { width: 150px; }
      .article-list { grid-template-columns: 1fr; }
    }
    @media (max-width: 480px) {
      .brand img { width: 32px; max-height: 32px; }
      .nav-cta { font-size: 12px; padding-inline: 10px; }
      .hero-stats { grid-template-columns: 1fr; }
      .hero-stat { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
      .signal-list, .steps, .service-grid, .case-grid, .review-grid, .form-grid { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .score-band, .footer-row { align-items: flex-start; flex-direction: column; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }