:root {
      color-scheme: light;
      --ink: #202326;
      --muted: #596168;
      --paper: #f7f8f3;
      --white: #fff;
      --line: #dfe4dc;
      --green: #c9f15b;
      --coral: #ff7058;
      --blue: #80d8ed;
      --violet: #bc9cff;
      --yellow: #ffd75e;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 82px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(247,248,243,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 72px; 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: 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: 9px 10px; text-decoration: none; font-size: 13px; font-weight: 650; color: #353b3e; }
    .nav-links a:hover { color: #50720b; }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      padding: 12px 18px; border: 1px solid var(--ink); border-radius: 5px;
      background: var(--ink); color: white; text-decoration: none; font-weight: 750;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta { white-space: nowrap; padding: 10px 14px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 4px 4px 0 var(--green); }
    .button-light { background: var(--white); color: var(--ink); }
    .button-bright { background: var(--green); color: var(--ink); border-color: var(--green); }
    .menu-toggle { display: none; border: 1px solid var(--ink); border-radius: 4px; background: white; color: var(--ink); padding: 9px 12px; font-weight: 700; }
    .hero { position: relative; overflow: hidden; padding: 84px 0 54px; border-bottom: 1px solid var(--line); }
    .hero::before {
      content: ""; position: absolute; inset: 0;
      background: repeating-linear-gradient(135deg, transparent 0 48px, rgba(32,35,38,.035) 49px 50px);
      pointer-events: none;
    }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr); gap: 50px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 17px; color: #454d36; font-size: 13px; font-weight: 800; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 26px; height: 8px; background: var(--coral); transform: skew(-24deg); }
    h1 { max-width: 720px; margin: 0; font-size: clamp(42px, 6vw, 76px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 640px; color: var(--muted); font-size: 18px; margin: 22px 0 26px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-art { min-height: 270px; position: relative; display: grid; place-items: center; }
    .hero-sticker { width: min(310px, 100%); aspect-ratio: 1; display: grid; place-items: center; border: 2px solid var(--ink); border-radius: 50%; background: var(--green); box-shadow: 12px 12px 0 var(--ink); transform: rotate(-5deg); }
    .hero-sticker strong { text-align: center; font-size: 29px; line-height: 1.2; transform: rotate(5deg); }
    .hero-sticker span { display: block; margin-top: 10px; font-size: 14px; font-weight: 650; }
    .scribble { position: absolute; width: 85px; height: 42px; border: 5px solid var(--coral); border-left-color: transparent; border-bottom-color: transparent; border-radius: 50%; transform: rotate(26deg); right: 0; top: 22px; }
    .hero-tag { position: absolute; left: 1px; bottom: 25px; padding: 8px 13px; background: var(--blue); border: 1px solid var(--ink); transform: rotate(-7deg); font-size: 13px; font-weight: 800; }
    .metrics { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 56px; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
    .metric { padding: 20px 14px; border-right: 1px solid var(--line); }
    .metric:last-child { border: 0; }
    .metric strong { display: block; font-size: 21px; }
    .metric span { color: var(--muted); font-size: 13px; }
    section.content-section { padding: 78px 0; border-bottom: 1px solid var(--line); }
    .section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-heading h2 { max-width: 700px; margin: 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; }
    .section-heading p { max-width: 410px; margin: 0; color: var(--muted); }
    .kicker { margin: 0 0 8px; color: #626d40; font-weight: 800; font-size: 12px; text-transform: uppercase; }
    .intro-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 46px; align-items: start; }
    .intro-copy { font-size: 18px; color: #42494c; }
    .intro-copy p { margin: 0 0 16px; }
    .intro-points { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; border-top: 1px solid var(--ink); }
    .intro-points div { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .intro-points strong { display: block; font-size: 15px; }
    .intro-points span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .service-item { position: relative; padding: 20px; min-height: 176px; background: white; border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover, .quote:hover { transform: translateY(-4px); box-shadow: 5px 5px 0 var(--ink); }
    .service-item:nth-child(4n+1) { border-top: 4px solid var(--coral); }
    .service-item:nth-child(4n+2) { border-top: 4px solid var(--blue); }
    .service-item:nth-child(4n+3) { border-top: 4px solid var(--green); }
    .service-item:nth-child(4n) { border-top: 4px solid var(--violet); }
    .service-item h3 { margin: 0 0 8px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-item .index { position: absolute; right: 14px; top: 13px; color: #8c9392; font-size: 11px; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .tag-list span { padding: 7px 11px; border: 1px solid #b9c0b7; border-radius: 3px; background: #fff; font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
    .step { padding: 23px 20px 24px 0; }
    .step + .step { border-left: 1px solid var(--line); padding-left: 20px; }
    .step b { color: #768a26; font-size: 13px; }
    .step h3 { margin: 6px 0; font-size: 18px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .split-band { display: grid; grid-template-columns: .85fr 1.15fr; gap: 34px; align-items: center; }
    .highlight-panel { padding: 30px; background: var(--yellow); border: 1px solid var(--ink); box-shadow: 7px 7px 0 var(--ink); }
    .highlight-panel h3 { margin: 0 0 8px; font-size: 22px; }
    .highlight-panel p { margin: 0; }
    .solution-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 26px; }
    .solution-list article { padding-bottom: 12px; border-bottom: 1px solid var(--line); }
    .solution-list h3 { margin: 0 0 5px; font-size: 16px; }
    .solution-list p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--ink); }
    .network-strip div { padding: 22px; }
    .network-strip div + div { border-left: 1px solid var(--line); }
    .network-strip strong { display: block; margin-bottom: 5px; font-size: 16px; }
    .network-strip span { color: var(--muted); font-size: 14px; }
    .media-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .media-frame { margin: 0; padding: 10px; background: white; border: 1px solid var(--line); }
    .media-frame img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .media-frame figcaption { padding: 10px 3px 2px; font-size: 14px; font-weight: 700; }
    .portrait-frame { max-width: 340px; }
    .portrait-frame img { aspect-ratio: 1; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; border-collapse: collapse; min-width: 670px; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #eef2e8; font-size: 14px; }
    td { font-size: 14px; }
    td:first-child { font-weight: 750; }
    .score-row { display: flex; align-items: center; gap: 14px; margin: 0 0 18px; }
    .score { padding: 11px 16px; background: var(--green); border: 1px solid var(--ink); font-size: 26px; font-weight: 900; }
    .stars { color: #af7200; letter-spacing: 0; font-size: 22px; }
    .case-grid, .quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
    .case { min-height: 165px; padding: 22px; border: 1px solid var(--ink); }
    .case:nth-child(3n+1) { background: #e6f3bc; }
    .case:nth-child(3n+2) { background: #d9f1f6; }
    .case:nth-child(3n) { background: #ffe0d9; }
    .case h3 { margin: 0 0 8px; font-size: 18px; }
    .case p { margin: 0; font-size: 14px; color: #42494c; }
    .quote { padding: 20px; background: white; border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .quote blockquote { margin: 0 0 16px; color: #394044; font-size: 14px; }
    .quote cite { font-style: normal; font-size: 13px; font-weight: 800; }
    .price-note { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: center; padding: 22px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
    .price-note p { margin: 0; color: var(--muted); }
    .price-note strong { font-size: 18px; }
    .faq-list { border-top: 1px solid var(--ink); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 42px 17px 0; cursor: pointer; font-weight: 750; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 7px; top: 12px; font-size: 23px; font-weight: 400; transition: transform .2s ease; }
    details[open] summary::after { transform: rotate(45deg); }
    details p { max-width: 820px; margin: 0; padding: 0 0 17px; color: var(--muted); }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-list a { min-height: 110px; display: flex; align-items: end; padding: 14px; background: white; border: 1px solid var(--line); text-decoration: none; font-weight: 700; }
    .article-list a:hover { background: var(--green); }
    .knowledge-row { display: flex; flex-wrap: wrap; gap: 8px; }
    .knowledge-row span { padding: 8px 11px; background: #e6f3bc; border: 1px solid #cbd8a8; font-size: 13px; }
    .form-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .contact-copy p { color: var(--muted); }
    .contact-list { padding: 0; margin: 20px 0 0; list-style: none; }
    .contact-list li { padding: 9px 0; border-bottom: 1px solid var(--line); }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    label { display: grid; gap: 6px; font-size: 13px; font-weight: 750; }
    label.full { grid-column: 1 / -1; }
    input, select, textarea { width: 100%; padding: 12px; border: 1px solid #bfc6bf; border-radius: 3px; background: white; color: var(--ink); font: inherit; }
    textarea { min-height: 120px; resize: vertical; }
    form button { justify-self: start; cursor: pointer; }
    .join-band { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 28px; background: var(--violet); border: 1px solid var(--ink); }
    .join-band h2 { margin: 0 0 5px; font-size: 25px; }
    .join-band p { margin: 0; }
    .site-footer { padding: 28px 0; background: #e7ebe3; color: #202326; }
    .footer-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; max-width: 670px; }
    .footer-links a { color: #30383a; font-size: 13px; }
    .copyright { margin-top: 18px; padding-top: 14px; border-top: 1px solid #cbd0c9; color: #596168; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 22px; }
    .float-contact a { display: block; padding: 12px 15px; background: var(--green); border: 1px solid var(--ink); box-shadow: 3px 3px 0 var(--ink); text-decoration: none; font-size: 13px; font-weight: 800; }
    .to-top { position: fixed; right: 20px; bottom: 78px; z-index: 14; width: 39px; height: 39px; border: 1px solid var(--ink); background: white; color: var(--ink); cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s ease; }
    .to-top.visible { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (max-width: 980px) {
      .nav-links { gap: 0; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-cta { display: none; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-flex; }
      .nav-links { display: none; position: absolute; top: 63px; left: 0; right: 0; padding: 10px 16px 16px; background: var(--paper); border-bottom: 1px solid var(--line); align-items: stretch; }
      .nav-links.open { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-links a { padding: 11px; border-bottom: 1px solid var(--line); font-size: 14px; }
      .hero { padding: 56px 0 38px; }
      .hero-inner, .intro-layout, .split-band, .form-layout { grid-template-columns: 1fr; gap: 30px; }
      .hero-art { min-height: 220px; }
      .hero-sticker { width: 215px; }
      .hero-sticker strong { font-size: 23px; }
      .metrics { grid-template-columns: 1fr 1fr; margin-top: 34px; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      section.content-section { padding: 56px 0; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 12px; }
      .service-grid { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step { padding: 18px 12px 18px 0; }
      .step + .step { padding-left: 12px; }
      .step:nth-child(3) { border-left: 0; }
      .network-strip { grid-template-columns: 1fr; }
      .network-strip div + div { border-left: 0; border-top: 1px solid var(--line); }
      .case-grid, .quote-grid { grid-template-columns: 1fr 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .footer-row { display: block; }
      .footer-links { margin-top: 16px; }
      .join-band { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      h1 { font-size: 42px; }
      .hero-copy { font-size: 16px; }
      .service-grid, .case-grid, .quote-grid, .solution-list, .media-grid { grid-template-columns: 1fr; }
      .service-item { min-height: 0; }
      .intro-points { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .price-note { grid-template-columns: 1fr; }
      form { grid-template-columns: 1fr; }
      label.full { grid-column: auto; }
      .float-contact { right: 12px; bottom: 14px; }
      .float-contact a { padding: 10px 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }