:root {
      color-scheme: light;
      --ink: #25251f;
      --muted: #66665d;
      --paper: #fffaf3;
      --white: #fff;
      --line: #e8e0d4;
      --coral: #f46c4e;
      --blue: #3e83d2;
      --yellow: #f6c94c;
      --green: #6ba978;
      --pink: #e9a0a7;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 82px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: "Microsoft YaHei", "PingFang SC", 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; }
    .topbar { position: sticky; z-index: 20; top: 0; background: rgba(255,250,243,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .brand img { width: 42px; max-height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 10px; color: #45453e; text-decoration: none; font-size: 13px; }
    .nav-links a:hover { color: var(--coral); }
    .nav-cta, .button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 8px; padding: 0 20px; border: 0; border-radius: 4px; background: var(--ink); color: white; text-decoration: none; font-weight: 700; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); background: #414139; box-shadow: 0 7px 18px #25251f24; }
    .button--coral { background: var(--coral); }
    .button--coral:hover { background: #df5a3d; }
    .button--outline { border: 1px solid var(--ink); background: transparent; color: var(--ink); }
    .button--outline:hover { background: var(--ink); color: white; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; background: white; color: var(--ink); cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 58px; background: #fff2d4; border-bottom: 1px solid #ecd9b5; }
    .hero::before, .hero::after { position: absolute; content: ""; pointer-events: none; }
    .hero::before { width: 220px; height: 220px; right: 9%; top: 35px; border: 2px dashed #ed9b68; border-radius: 50%; transform: rotate(-18deg); }
    .hero::after { width: 110px; height: 110px; right: 18%; bottom: 35px; background: var(--blue); clip-path: polygon(50% 0, 100% 100%, 0 82%); opacity: .9; transform: rotate(12deg); }
    .hero-inner { position: relative; z-index: 1; max-width: 850px; }
    .eyebrow { display: inline-block; margin: 0 0 18px; color: #a14d32; font-weight: 800; letter-spacing: 1px; }
    h1 { max-width: 760px; margin: 0; font-size: clamp(38px, 7vw, 72px); line-height: 1.08; letter-spacing: 0; }
    .hero p { max-width: 670px; margin: 22px 0 28px; color: #4e4a40; font-size: 18px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .hero-note { margin-top: 22px; color: #61584a; font-size: 14px; }
    .scribble { display: inline-block; padding: 0 5px 3px; background: linear-gradient(transparent 61%, #f6c94c 61%); }
    .metrics { padding: 26px 0; background: #fffaf3; }
    .metrics-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; border: 1px solid var(--line); background: white; }
    .metric { padding: 18px 22px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; font-size: 21px; }
    .metric span { color: var(--muted); font-size: 13px; }
    section.content-section { padding: 74px 0; }
    section.tinted { background: #f5eee3; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { margin: 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; }
    .section-head p { max-width: 520px; margin: 0; color: var(--muted); }
    .kicker { margin: 0 0 8px; color: #bf583d; font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    .intro-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: start; }
    .intro-copy { font-size: 17px; color: #4e4e46; }
    .intro-copy p { margin-top: 0; }
    .intro-copy strong { color: var(--ink); }
    .capability-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 13px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .capability-list li::before { content: "＋"; margin-right: 9px; color: var(--coral); }
    .tag-cloud { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 25px; }
    .tag-cloud span { padding: 7px 12px; border: 1px solid #c9d9e9; background: #edf5fb; color: #315d83; font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-item { padding: 22px; border: 1px solid var(--line); border-top: 4px solid var(--tone, var(--coral)); background: white; transition: transform .2s, box-shadow .2s; }
    .service-item:hover { transform: translateY(-4px); box-shadow: 0 12px 28px #342b1c12; }
    .service-item h3 { margin: 0 0 8px; font-size: 19px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item:nth-child(4n+2) { --tone: var(--blue); }
    .service-item:nth-child(4n+3) { --tone: var(--yellow); }
    .service-item:nth-child(4n+4) { --tone: var(--green); }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; counter-reset: step; }
    .step { position: relative; padding: 20px 18px 18px 0; border-top: 2px solid var(--ink); counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin-bottom: 13px; color: var(--coral); font-weight: 900; font-size: 24px; }
    .step h3 { margin: 0 0 7px; font-size: 18px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px 34px; }
    .industry { padding: 0 0 18px; border-bottom: 1px solid var(--line); }
    .industry h3 { margin: 0 0 7px; font-size: 18px; }
    .industry p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-band { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; padding: 28px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .network-band h3 { margin: 0 0 8px; font-size: 23px; }
    .network-band p { margin: 0; color: var(--muted); }
    .network-chips { display: flex; flex-wrap: wrap; gap: 8px; }
    .network-chips span { padding: 7px 11px; border: 1px solid #d5c9b6; background: #fff; font-size: 13px; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    .compare-table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    .compare-table th, .compare-table td { padding: 15px 17px; border-bottom: 1px solid var(--line); }
    .compare-table thead { background: #262821; color: white; }
    .compare-table th:first-child { width: 24%; }
    .compare-table tbody th { background: #fff7e8; }
    .rating { display: flex; align-items: baseline; gap: 12px; margin: 0 0 20px; }
    .rating strong { color: #c34b2d; font-size: 42px; line-height: 1; }
    .rating span { color: #9b7320; letter-spacing: 2px; }
    .case-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 26px; align-items: start; }
    .case-feature { padding: 24px; background: #dff0e3; border-left: 6px solid var(--green); }
    .case-feature h3 { margin: 0 0 8px; }
    .case-feature p { margin: 0; color: #3f5743; }
    .case-list { margin: 0; padding: 0; list-style: none; }
    .case-list li { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .case-list strong { display: block; }
    .case-list span { color: var(--muted); font-size: 14px; }
    .reviews-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 20px; border: 1px solid var(--line); background: white; }
    .review p { margin: 0 0 16px; color: #484840; }
    .review strong { display: block; font-size: 14px; }
    .review span { color: var(--muted); font-size: 12px; }
    .price-panel { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 25px 0; border-block: 1px solid var(--line); }
    .price-panel h3 { margin: 0 0 6px; font-size: 22px; }
    .price-panel p { margin: 0; color: var(--muted); }
    .price-label { padding: 12px 16px; background: #fff0d2; color: #684d14; font-weight: 700; white-space: nowrap; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { position: absolute; right: 4px; content: "+"; color: var(--coral); font-size: 23px; line-height: 1; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 800px; margin: 0 0 18px; color: var(--muted); }
    .article-links { display: grid; grid-template-columns: repeat(2,1fr); gap: 0 28px; }
    .article-links a { padding: 13px 0; border-bottom: 1px solid var(--line); color: #315d83; text-decoration: none; overflow-wrap: anywhere; }
    .article-links a:hover { color: var(--coral); }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-info h3 { margin-top: 0; font-size: 24px; }
    .contact-info p { color: var(--muted); }
    .contact-info a { color: #315d83; }
    .contact-qr { width: 150px; padding: 7px; border: 1px solid var(--line); background: white; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .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%; padding: 12px; border: 1px solid #d6cec2; border-radius: 2px; background: white; color: var(--ink); }
    .field textarea { min-height: 120px; resize: vertical; }
    .footer { padding: 30px 0 24px; background: #eee7dc; color: #30302a; }
    .footer-main { display: flex; justify-content: space-between; gap: 28px; align-items: start; }
    .footer p { margin: 5px 0; color: #55544d; font-size: 13px; }
    .footer-links { display: flex; justify-content: flex-end; gap: 8px 18px; flex-wrap: wrap; max-width: 620px; }
    .footer-links a { color: #315d83; font-size: 13px; }
    .copyright { margin-top: 22px; padding-top: 14px; border-top: 1px solid #d4cbbd; color: #65645c; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 16px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
    .float-contact a { display: inline-flex; justify-content: center; align-items: center; padding: 10px 14px; border: 1px solid #d6cec2; background: white; color: var(--ink); text-decoration: none; box-shadow: 0 4px 14px #25251f18; font-size: 13px; }
    .float-contact a:hover { background: #fff1d4; }
    .reveal { opacity: 0; transform: translateY(14px); 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; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 1000px) {
      .nav { min-height: 68px; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 10px 20px 16px; border-bottom: 1px solid var(--line); background: var(--paper); align-items: stretch; }
      .nav-links.is-open { display: flex; flex-direction: column; }
      .nav-links a { padding: 10px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .hero { padding: 58px 0 42px; }
      .hero::before { width: 120px; height: 120px; right: -18px; top: 20px; }
      .hero::after { width: 62px; height: 62px; right: 18%; bottom: 16px; }
      .hero p { font-size: 16px; }
      .metrics-grid { grid-template-columns: repeat(2,1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      section.content-section { padding: 54px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .intro-layout, .network-band, .case-grid, .contact-layout { grid-template-columns: 1fr; gap: 24px; }
      .capability-list { grid-template-columns: 1fr; }
      .service-grid, .industry-grid, .reviews-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2,1fr); gap: 10px 18px; }
      .price-panel { align-items: start; flex-direction: column; }
      .article-links { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field--full { grid-column: auto; }
      .footer-main { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
      .float-contact { right: 10px; bottom: 10px; }
      .float-contact a { padding: 9px 11px; }
    }