:root {
      color-scheme: light;
      --ink: #252321;
      --muted: #6f6965;
      --red: #d62c25;
      --red-dark: #a71f1a;
      --rose: #fff0eb;
      --paper: #fffaf7;
      --line: #eadbd5;
      --green: #166b58;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      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 { 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(255,250,247,.96); border-bottom: 1px solid rgba(234,219,213,.9); backdrop-filter: blur(12px); }
    .nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .brand img { width: 42px; max-height: 42px; object-fit: contain; }
    .brand-name { font-size: 17px; font-weight: 800; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; color: #514b47; font-size: 12px; border-radius: 5px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--red); background: var(--rose); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 5px; padding: 12px 18px; background: var(--red); color: #fff; font-weight: 750; transition: transform .18s, background .18s, box-shadow .18s; cursor: pointer; }
    .nav-cta { margin-left: 8px; padding: 9px 13px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--red-dark); box-shadow: 0 8px 20px rgba(166,31,26,.2); }
    .button.secondary { color: var(--red-dark); background: #fff; border: 1px solid #e4b9ac; }
    .button.secondary:hover { background: var(--rose); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); cursor: pointer; }
    .hero { overflow: hidden; position: relative; background: #fff0eb; border-bottom: 1px solid #f0ddd6; }
    .hero::before { content: ""; position: absolute; inset: auto -8% -45% 48%; height: 480px; border: 1px solid rgba(214,44,37,.14); border-radius: 50%; transform: rotate(-16deg); box-shadow: 0 0 0 42px rgba(214,44,37,.025), 0 0 0 92px rgba(214,44,37,.02); pointer-events: none; }
    .hero-inner { position: relative; padding-block: 76px 62px; }
    .eyebrow { margin: 0 0 14px; color: var(--red-dark); font-size: 13px; font-weight: 800; letter-spacing: 1.3px; }
    h1 { max-width: 760px; margin: 0; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 680px; margin: 20px 0 0; color: #554b46; font-size: 17px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
    .hero-note { margin: 18px 0 0; color: #71635d; font-size: 13px; }
    .hero-strip { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #e9cfc5; }
    .hero-metric { padding: 18px 20px 18px 0; }
    .hero-metric + .hero-metric { border-left: 1px solid #e9cfc5; padding-left: 22px; }
    .hero-metric strong { display: block; color: var(--red-dark); font-size: 20px; }
    .hero-metric span { color: #655b56; font-size: 12px; }
    main { overflow: hidden; }
    .section { padding: 70px 0; }
    .section.tinted { background: #fff3ee; border-block: 1px solid #f1e0da; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 28px; }
    .section-head > div { max-width: 700px; }
    .section-kicker { margin: 0 0 7px; color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    h2 { margin: 0; font-size: 32px; line-height: 1.2; letter-spacing: 0; }
    .section-intro { margin: 10px 0 0; color: var(--muted); max-width: 720px; }
    h3 { margin: 0; font-size: 18px; letter-spacing: 0; }
    .text-link { color: var(--red-dark); font-weight: 750; white-space: nowrap; }
    .text-link:hover { text-decoration: underline; }
    .about-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 42px; align-items: start; }
    .about-copy { font-size: 16px; color: #554e49; }
    .about-copy p { margin: 0 0 14px; }
    .principles { border-left: 3px solid var(--red); padding: 4px 0 4px 22px; }
    .principles p { margin: 0 0 12px; color: #564e49; }
    .principles strong { color: var(--ink); }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { min-height: 152px; padding: 20px; border: 1px solid var(--line); border-radius: 6px; background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
    .service-item:hover { transform: translateY(-3px); border-color: #dfaca0; box-shadow: 0 10px 24px rgba(82,43,33,.08); }
    .service-item p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
    .service-no { display: block; margin-bottom: 9px; color: var(--red); font-size: 12px; font-weight: 800; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .tag { padding: 6px 10px; border: 1px solid #e6d4ce; border-radius: 4px; background: #fff; color: #514843; font-size: 13px; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: steps; }
    .step { position: relative; padding: 18px 16px 18px 0; border-top: 2px solid #d9b0a5; counter-increment: steps; }
    .step::before { content: "0" counter(steps); display: block; margin-bottom: 13px; color: var(--red); font-size: 13px; font-weight: 800; }
    .step p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }
    .solution-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 36px; }
    .solution { display: grid; grid-template-columns: 104px 1fr; gap: 15px; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .solution strong { color: var(--red-dark); }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-band { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 26px; border-left: 4px solid var(--red); background: #fff; }
    .network-band p { margin: 6px 0 0; color: var(--muted); }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { overflow: hidden; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
    .case img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .case-body { padding: 16px; }
    .case-body p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 18px; border-top: 2px solid var(--red); background: #fff; }
    .review p { margin: 0 0 14px; color: #514a46; font-size: 14px; }
    .review footer { color: var(--muted); font-size: 12px; }
    .rating-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 26px; align-items: start; }
    .rating-summary { padding: 24px; background: #b5221d; color: #fff; }
    .rating-summary h3 { color: #fff; }
    .rating-number { margin: 16px 0 0; font-size: 50px; font-weight: 850; line-height: 1; }
    .rating-number span { font-size: 16px; font-weight: 500; }
    .stars { margin-top: 10px; color: #ffe1a6; letter-spacing: 2px; }
    .rating-summary p { color: #fff1ec; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 580px; text-align: left; }
    th, td { padding: 12px 14px; border-bottom: 1px solid #eee2dd; font-size: 13px; }
    th { background: #fff3ee; color: #473f3a; }
    td:last-child { color: var(--green); font-weight: 700; }
    .match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 38px; align-items: start; }
    .match-copy p { color: var(--muted); }
    .match-points { display: grid; gap: 12px; margin-top: 22px; }
    .match-point { padding-bottom: 12px; border-bottom: 1px solid var(--line); }
    .match-point strong { display: block; }
    .match-point span { color: var(--muted); font-size: 13px; }
    .price-table { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line); }
    .price-cell { padding: 22px 20px; }
    .price-cell + .price-cell { border-left: 1px solid var(--line); }
    .price-cell strong { display: block; font-size: 16px; }
    .price-cell span { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 26px; }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 16px 30px 16px 0; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 2px; top: 13px; color: var(--red); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0 0 16px; color: var(--muted); font-size: 14px; }
    .info-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
    .info-list { margin: 14px 0 0; padding: 0; list-style: none; }
    .info-list li { display: flex; justify-content: space-between; gap: 18px; padding: 11px 0; border-bottom: 1px solid var(--line); }
    .info-list a { color: var(--red-dark); font-weight: 650; }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; border: 1px solid var(--line); background: #fff; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid #d9ccc6; border-radius: 4px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .contact-details { display: grid; gap: 12px; margin-top: 18px; color: #514a46; font-size: 14px; }
    .contact-details a { color: var(--red-dark); }
    .qr { width: 116px; padding: 6px; border: 1px solid var(--line); background: #fff; }
    .footer { padding: 26px 0; background: #fff; border-top: 1px solid var(--line); color: #514a46; }
    .footer-top { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 13px; }
    .footer-links a:hover { color: var(--red); }
    .copyright { margin: 14px 0 0; color: #766d68; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
    .float-contact a { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid #e7c7bd; border-radius: 50%; background: #fff; color: var(--red-dark); box-shadow: 0 4px 14px rgba(69,35,27,.12); font-size: 12px; font-weight: 800; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.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: 950px) {
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-wrap { position: relative; }
      .nav-links { display: none; position: absolute; top: calc(100% - 1px); left: 0; right: 0; padding: 12px; border: 1px solid var(--line); background: var(--paper); box-shadow: 0 12px 22px rgba(40,25,20,.08); align-items: stretch; }
      .nav-links.open { display: flex; flex-direction: column; }
      .nav-links a { padding: 9px 10px; font-size: 14px; }
      .nav-cta { margin: 6px 0 0; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .case-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 650px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .hero-inner { padding-block: 55px 42px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); }
      .hero-metric { padding: 14px 8px 14px 0; }
      .hero-metric + .hero-metric { padding-left: 12px; }
      .hero-metric:nth-child(3) { border-left: 0; padding-left: 0; border-top: 1px solid #e9cfc5; }
      .hero-metric:nth-child(4) { border-top: 1px solid #e9cfc5; }
      .section { padding: 52px 0; }
      .section-head { display: block; }
      .section-head .text-link { display: inline-block; margin-top: 14px; }
      h2 { font-size: 28px; }
      .about-grid, .solution-list, .rating-layout, .match-grid, .info-columns { grid-template-columns: 1fr; gap: 24px; }
      .service-grid, .case-grid, .review-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(2, 1fr); gap: 8px 16px; }
      .solution { grid-template-columns: 94px 1fr; }
      .network-band { align-items: flex-start; flex-direction: column; padding: 20px; }
      .faq-list { grid-template-columns: 1fr; }
      .price-table { grid-template-columns: 1fr; }
      .price-cell { padding: 16px 4px; }
      .price-cell + .price-cell { border-left: 0; border-top: 1px solid var(--line); }
      .form { grid-template-columns: 1fr; padding: 16px; }
      .field.full { grid-column: auto; }
      .footer-top { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
    }