:root {
      color-scheme: light;
      --ink: #20231f;
      --muted: #62675f;
      --paper: #f7f6f1;
      --white: #fffefa;
      --line: #deded3;
      --green: #236a4a;
      --lime: #d8f36a;
      --coral: #f0785c;
      --blue: #587fdb;
      --yellow: #ffd65e;
      --purple: #a88ad2;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .topbar { position: sticky; z-index: 20; top: 0; background: rgba(247,246,241,.95); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; text-decoration: none; font-weight: 850; }
    .brand img { width: 38px; height: 38px; object-fit: contain; }
    .nav-right { display: flex; align-items: center; justify-content: flex-end; gap: 18px; }
    .nav-links { display: flex; align-items: center; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 10px; color: #42463f; text-decoration: none; font-size: 13px; }
    .nav-links a:hover { color: var(--green); }
    .button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 17px; border: 1px solid var(--ink); background: var(--ink); color: white; text-decoration: none; font-weight: 750; transition: transform .2s, box-shadow .2s, background .2s; cursor: pointer; }
    .button:hover { transform: translateY(-2px); box-shadow: 4px 4px 0 var(--lime); }
    .button-light { color: var(--ink); background: var(--white); }
    .button-green { color: white; background: var(--green); border-color: var(--green); }
    .menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: var(--white); color: var(--ink); cursor: pointer; }
    .hero { padding: 60px 0 44px; overflow: hidden; }
    .hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); gap: 44px; align-items: center; }
    .eyebrow { display: inline-flex; gap: 8px; align-items: center; font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 22px; height: 8px; background: var(--coral); transform: rotate(-12deg); }
    h1 { max-width: 720px; margin: 17px 0; font-size: clamp(40px, 6vw, 68px); line-height: 1.08; letter-spacing: 0; }
    h1 span { color: var(--green); }
    .hero-copy { max-width: 650px; color: var(--muted); font-size: 18px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 25px; }
    .hero-note { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 25px; color: var(--muted); font-size: 13px; }
    .hero-note strong { color: var(--ink); }
    .hero-art { min-height: 340px; position: relative; display: grid; place-items: center; }
    .art-paper { position: relative; width: min(100%, 430px); min-height: 300px; padding: 28px; border: 1px solid var(--ink); background: var(--lime); box-shadow: 9px 9px 0 var(--ink); transform: rotate(1deg); }
    .art-paper::before, .art-paper::after { content: ""; position: absolute; border: 2px solid var(--ink); pointer-events: none; }
    .art-paper::before { width: 55px; height: 55px; top: -17px; right: 24px; border-radius: 50%; background: var(--coral); }
    .art-paper::after { width: 34px; height: 34px; left: -17px; bottom: 25px; background: var(--blue); transform: rotate(20deg); }
    .art-heading { font-size: 13px; font-weight: 800; }
    .week-row { display: grid; grid-template-columns: 72px 1fr; gap: 14px; align-items: center; padding: 13px 0; border-bottom: 1px dashed rgba(32,35,31,.45); }
    .week-row:last-child { border: 0; }
    .week-day { font-size: 12px; font-weight: 850; }
    .week-task { font-weight: 750; }
    .week-task small { display: block; color: #4e5647; font-weight: 500; }
    .sticker { position: absolute; right: -7px; bottom: 13px; padding: 7px 12px; background: var(--coral); border: 1px solid var(--ink); font-size: 12px; font-weight: 850; transform: rotate(-5deg); }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
    .metric { padding: 21px 18px; border-right: 1px solid var(--line); }
    .metric:last-child { border: 0; }
    .metric strong { display: block; font-size: 24px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    section.content-section { padding: 70px 0; }
    .section-head { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 28px; }
    .section-head h2 { margin: 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { max-width: 510px; margin: 0; color: var(--muted); }
    .kicker { color: var(--green); font-size: 12px; font-weight: 850; }
    .about-band { background: #e8eedb; border-block: 1px solid var(--line); }
    .about-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
    .about-layout h2 { margin: 7px 0 15px; font-size: 36px; line-height: 1.2; }
    .about-layout p { color: #4f574d; }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; }
    .feature-line { padding: 15px 0; border-bottom: 1px solid #cbd4be; }
    .feature-line strong { display: block; margin-bottom: 3px; }
    .feature-line span { color: var(--muted); font-size: 14px; }
    .services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service { min-height: 180px; padding: 22px; border: 1px solid var(--line); background: var(--white); transition: transform .22s, box-shadow .22s; }
    .service:hover, .quote:hover { transform: translateY(-4px); box-shadow: 5px 5px 0 var(--ink); }
    .service .number { color: var(--green); font-size: 12px; font-weight: 850; }
    .service h3 { margin: 9px 0 8px; font-size: 20px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .service:nth-child(3n+2) { background: #fff0df; }
    .service:nth-child(3n) { background: #e8efff; }
    .workflow-band { background: #242922; color: #fff; }
    .workflow-band .section-head p, .workflow-band .kicker { color: #d1d7c9; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid #63695f; }
    .step { padding: 23px 20px 5px 0; }
    .step b { color: var(--lime); font-size: 13px; }
    .step h3 { margin: 10px 0 6px; font-size: 19px; }
    .step p { margin: 0; color: #c3c8be; font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: stretch; }
    .industry-feature { padding: 30px; background: var(--coral); border: 1px solid var(--ink); }
    .industry-feature h3 { margin: 0 0 10px; font-size: 28px; }
    .industry-feature p { max-width: 520px; }
    .industry-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 19px; }
    .industry-tags span { padding: 6px 10px; border: 1px solid rgba(32,35,31,.55); font-size: 13px; font-weight: 700; }
    .industry-side { display: grid; align-content: center; gap: 0; }
    .industry-side div { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .industry-side strong { display: block; }
    .industry-side span { color: var(--muted); font-size: 14px; }
    .network { padding: 27px; border: 1px solid var(--line); background: var(--white); }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .model-cloud span { padding: 7px 11px; border: 1px solid #cbd3c6; background: #f4f7ef; font-size: 13px; }
    .network-note { margin: 18px 0 0; color: var(--muted); font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { padding: 22px; background: #fff0df; border-top: 4px solid var(--coral); }
    .case:nth-child(2) { background: #e8efff; border-color: var(--blue); }
    .case:nth-child(3) { background: #e8eedb; border-color: var(--green); }
    .case h3 { margin: 0 0 8px; font-size: 20px; }
    .case p { margin: 0; color: #4e544b; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); }
    table { width: 100%; border-collapse: collapse; min-width: 740px; }
    th, td { padding: 15px 17px; text-align: left; border-bottom: 1px solid var(--line); }
    th { background: #e8eedb; font-size: 13px; }
    td { font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; align-items: center; gap: 20px; margin-bottom: 20px; padding: 20px 24px; background: var(--yellow); border: 1px solid var(--ink); }
    .rating strong { font-size: 34px; line-height: 1; }
    .rating span { font-weight: 750; }
    .rating .stars { color: #20231f; letter-spacing: 2px; }
    .form-band { background: #e8efff; border-block: 1px solid var(--line); }
    .form-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 50px; align-items: start; }
    .form-intro h2 { margin: 8px 0 12px; font-size: 36px; line-height: 1.2; }
    .form-intro p { color: var(--muted); }
    .contact-list { margin-top: 22px; }
    .contact-list p { margin: 8px 0; color: var(--ink); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 750; }
    input, select, textarea { width: 100%; padding: 12px 13px; border: 1px solid #b9c3d8; border-radius: 0; background: var(--white); color: var(--ink); }
    textarea { min-height: 115px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid var(--blue); outline-offset: 1px; }
    .form-submit { margin-top: 14px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 40px 17px 0; font-weight: 750; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 3px; top: 12px; font-size: 24px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 820px; margin: 0 40px 17px 0; color: var(--muted); }
    .quotes-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .quote { padding: 20px; border: 1px solid var(--line); background: var(--white); transition: transform .2s, box-shadow .2s; }
    .quote p { margin: 0 0 17px; color: #454b43; }
    .quote strong { font-size: 13px; }
    .quote span { display: block; color: var(--muted); font-size: 12px; }
    .resource-band { background: #e8eedb; }
    .resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
    .resource-grid h3 { margin: 0 0 13px; font-size: 21px; }
    .article-links, .friend-links { display: flex; flex-wrap: wrap; gap: 9px; }
    .article-links a, .friend-links a { padding: 8px 11px; border: 1px solid #b8c4ae; background: var(--white); text-decoration: none; font-size: 13px; }
    .article-links a:hover, .friend-links a:hover { border-color: var(--green); color: var(--green); }
    .platform-image { margin-top: 25px; overflow: hidden; border: 1px solid var(--line); background: var(--white); }
    .platform-image img { display: block; width: 100%; height: auto; }
    .qr { display: inline-block; width: 132px; margin-top: 12px; padding: 7px; border: 1px solid var(--line); background: white; }
    .qr img { display: block; width: 100%; height: auto; }
    footer { padding: 24px 0; color: #30352e; background: #e4e3db; border-top: 1px solid #cfcec5; }
    .footer-row { display: flex; justify-content: space-between; gap: 20px; align-items: center; }
    .footer-row p { margin: 0; font-size: 13px; }
    .float-help { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .float-help a { padding: 10px 13px; border: 1px solid var(--ink); background: var(--lime); color: var(--ink); text-decoration: none; font-size: 13px; font-weight: 800; box-shadow: 3px 3px 0 var(--ink); }
    .reveal { opacity: 0; transform: translateY(14px); 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; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; left: 20px; right: 20px; top: 68px; padding: 12px; border: 1px solid var(--line); background: var(--paper); box-shadow: 0 10px 25px rgba(0,0,0,.08); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-right { gap: 9px; }
      .hero-grid { gap: 20px; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .nav { min-height: 64px; }
      .brand img { width: 32px; height: 32px; }
      .nav-right > .button { min-height: 39px; padding: 8px 11px; font-size: 13px; }
      .nav-links { top: 61px; left: 15px; right: 15px; }
      .nav-links.open { grid-template-columns: repeat(2, 1fr); }
      .hero { padding: 40px 0 30px; }
      .hero-grid, .about-layout, .industry-grid, .form-layout, .resource-grid { grid-template-columns: 1fr; }
      .hero-grid { gap: 24px; }
      .hero-art { min-height: 300px; }
      .art-paper { min-height: 280px; padding: 22px; }
      h1 { font-size: 43px; }
      .hero-copy { font-size: 16px; }
      .metrics { 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: 50px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .about-layout { gap: 20px; }
      .about-layout h2, .form-intro h2 { font-size: 30px; }
      .feature-list, .services-grid, .case-grid, .quotes-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(2, 1fr); }
      .step { padding: 18px 14px 5px 0; }
      .industry-feature { padding: 23px; }
      .form-layout { gap: 20px; }
      .footer-row { align-items: flex-start; flex-direction: column; }
      .float-help { right: 10px; bottom: 10px; }
      .float-help a { padding: 8px 10px; font-size: 12px; }
    }