:root {
      color-scheme: light;
      --ink: #172521;
      --muted: #5b6a64;
      --paper: #fbfcf8;
      --line: #dfe7df;
      --green: #16734d;
      --green-dark: #10553d;
      --lime: #d8f36a;
      --coral: #f0785c;
      --blue: #7ac9d2;
      --yellow: #f5cb55;
      --content: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    .container { width: min(var(--content), calc(100% - 40px)); margin-inline: auto; }
    .topbar { border-bottom: 1px solid var(--line); background: rgba(251,252,248,.94); }
    .nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; gap: 0; list-style: none; padding: 0; margin: 0; }
    .nav-links a { display: block; padding: 10px 11px; color: #364740; text-decoration: none; font-size: 13px; border-radius: 6px; }
    .nav-links a:hover { background: #edf4e9; color: var(--green-dark); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .menu-toggle { display: none; }
    .button { display: inline-flex; justify-content: center; align-items: center; gap: 9px; min-height: 46px; padding: 11px 19px; border: 1px solid transparent; border-radius: 6px; background: var(--green); color: #fff; text-decoration: none; font-weight: 700; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; cursor: pointer; }
    .button:hover { background: var(--green-dark); transform: translateY(-2px); box-shadow: 0 8px 20px #16734d24; }
    .button-outline { background: transparent; border-color: #9db3a6; color: var(--ink); }
    .button-outline:hover { background: #edf4e9; color: var(--green-dark); }
    .hero { overflow: hidden; position: relative; background: #edf4e9; border-bottom: 1px solid #d7e3d6; }
    .hero-inner { position: relative; padding: 76px 0 52px; }
    .hero-inner::before { content: ""; position: absolute; width: 330px; height: 330px; border: 1px solid #b9d2b9; border-radius: 50%; right: 3%; top: 16px; box-shadow: 0 0 0 28px #d9e9d633, 0 0 0 58px #d9e9d622; pointer-events: none; }
    .hero-inner::after { content: ""; position: absolute; width: 94px; height: 94px; right: 22%; top: 74px; border-radius: 22px; border: 1px solid #e2a98c; background: #f0785c30; transform: rotate(18deg); animation: drift 7s ease-in-out infinite; pointer-events: none; }
    .hero-copy { position: relative; z-index: 1; max-width: 700px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green-dark); font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    .eyebrow::before { content: ""; width: 24px; height: 3px; background: var(--coral); }
    h1 { max-width: 700px; margin: 19px 0 15px; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; }
    .hero-copy p { max-width: 620px; margin: 0; color: #43554c; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .hero-note { margin-top: 17px !important; font-size: 13px !important; }
    .hero-note a { text-underline-offset: 3px; }
    .hero-bottom { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4,1fr); gap: 0; margin-top: 59px; border-top: 1px solid #c8d9c8; }
    .metric { padding: 19px 18px 5px 0; }
    .metric + .metric { padding-left: 20px; border-left: 1px solid #c8d9c8; }
    .metric strong { display: block; font-size: 20px; line-height: 1.35; }
    .metric span { color: var(--muted); font-size: 13px; }
    .section { padding: 76px 0; }
    .section-tint { background: #f1f4ec; border-block: 1px solid #e3e9df; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-heading h2 { margin: 8px 0 0; font-size: 34px; line-height: 1.2; }
    .section-heading p { max-width: 530px; margin: 0; color: var(--muted); }
    .kicker { color: #b6533f; font-weight: 800; font-size: 12px; letter-spacing: 1.5px; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
    .intro-grid h2 { margin: 8px 0 14px; font-size: 34px; line-height: 1.22; }
    .intro-grid p { color: var(--muted); margin: 0 0 14px; }
    .intro-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; padding: 0; margin: 4px 0 0; list-style: none; }
    .intro-list li { padding: 13px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .intro-list li::before { content: "＋"; color: var(--green); margin-right: 9px; }
    .model-strip { padding: 20px 0 0; color: var(--muted); font-size: 14px; }
    .model-strip strong { color: var(--ink); margin-right: 9px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
    .tag { padding: 6px 11px; border: 1px solid #cad8ce; border-radius: 4px; background: #fff; color: #40564a; font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: #dbe4d9; border: 1px solid #dbe4d9; }
    .service { min-height: 184px; padding: 22px; background: var(--paper); transition: background .2s, transform .2s; }
    .service:hover { position: relative; z-index: 1; background: #fff; transform: translateY(-3px); }
    .service-num { color: #b6533f; font-size: 12px; font-weight: 800; }
    .service h3 { margin: 11px 0 7px; font-size: 19px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .service a { display: inline-block; margin-top: 13px; color: var(--green-dark); font-size: 13px; font-weight: 800; text-decoration: none; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; counter-reset: step; }
    .workflow article { position: relative; padding: 19px 17px 15px 0; border-top: 3px solid var(--green); counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; color: #b6533f; font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 9px 0 6px; font-size: 18px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 0 24px; }
    .industry { padding: 17px 0; border-bottom: 1px solid var(--line); }
    .industry h3 { margin: 0 0 5px; font-size: 16px; }
    .industry p { margin: 0; color: var(--muted); font-size: 13px; }
    .network { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: start; }
    .network h2 { margin: 8px 0 13px; font-size: 32px; }
    .network p { color: var(--muted); }
    .network-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
    .network-list span { padding: 12px; border-left: 3px solid var(--yellow); background: #fff; font-weight: 700; font-size: 14px; }
    .contact-mini { padding: 22px; border: 1px solid var(--line); background: #fff; }
    .contact-mini h3 { margin: 0 0 12px; }
    .contact-mini p { margin: 6px 0; font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .case { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; padding: 20px; background: #fff; border: 1px solid var(--line); }
    .case h3 { margin: 0 0 8px; font-size: 19px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .media-box { overflow: hidden; background: #edf1e8; }
    .media-box img { display: block; width: 100%; height: auto; }
    .rating-band { display: grid; grid-template-columns: .8fr 1.2fr; gap: 34px; align-items: center; padding: 29px; color: #fff; background: var(--green-dark); }
    .rating-score { border-right: 1px solid #ffffff55; }
    .rating-score strong { display: block; font-size: 48px; line-height: 1; }
    .rating-score span { display: block; margin-top: 9px; color: #e0ebdf; }
    .stars { color: var(--lime); letter-spacing: 4px; font-size: 23px; }
    .rating-band p { margin: 7px 0 0; color: #e0ebdf; font-size: 14px; }
    .table-wrap { overflow-x: auto; margin-top: 22px; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 680px; }
    th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); }
    th { background: #eff4ec; font-size: 14px; }
    td { font-size: 14px; }
    td:first-child { font-weight: 700; }
    .good { color: var(--green-dark); font-weight: 800; }
    .reviews { display: grid; grid-template-columns: repeat(3,1fr); gap: 13px; }
    .review { padding: 19px; border-top: 3px solid var(--blue); background: #fff; }
    .review:nth-child(3n+2) { border-color: var(--coral); }
    .review:nth-child(3n) { border-color: var(--yellow); }
    .review p { margin: 0 0 15px; color: #415249; font-size: 14px; }
    .review strong { font-size: 13px; }
    .review span { display: block; color: var(--muted); font-size: 12px; }
    .match-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .match-grid h2 { margin: 8px 0 12px; font-size: 32px; }
    .match-grid p { color: var(--muted); }
    form { 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: 700; }
    input, select, textarea { width: 100%; min-height: 45px; padding: 10px 12px; border: 1px solid #cbd7ce; border-radius: 4px; background: #fff; color: var(--ink); }
    textarea { min-height: 105px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid #88bd9e; outline-offset: 1px; }
    .form-submit { grid-column: 1 / -1; justify-self: start; }
    .faq-list { border-top: 1px solid #cbd7ce; }
    details { border-bottom: 1px solid #cbd7ce; }
    summary { position: relative; padding: 17px 35px 17px 0; font-weight: 700; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 3px; top: 13px; color: var(--green); font-size: 22px; }
    details[open] summary::after { content: "−"; }
    details p { margin: -2px 35px 17px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; }
    .article-link { min-height: 94px; padding: 14px; display: flex; flex-direction: column; justify-content: space-between; background: #fff; border: 1px solid var(--line); text-decoration: none; font-size: 14px; font-weight: 700; }
    .article-link span { color: var(--green); font-size: 12px; font-weight: 600; }
    .footer { padding: 35px 0 22px; color: #263a31; background: #e9efe6; border-top: 1px solid #d6e0d4; }
    .footer-main { display: flex; justify-content: space-between; align-items: start; gap: 28px; }
    .footer p { margin: 6px 0; color: #4d5e54; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; max-width: 600px; }
    .footer-links a { color: #315443; font-size: 13px; text-decoration: none; }
    .footer-bottom { margin-top: 22px; padding-top: 14px; border-top: 1px solid #cdd8cb; color: #526257; font-size: 12px; }
    .floating { position: fixed; right: 18px; bottom: 18px; z-index: 10; display: grid; gap: 8px; }
    .float-btn { display: grid; place-items: center; min-width: 48px; min-height: 46px; padding: 8px 12px; border: 0; border-radius: 5px; background: var(--green-dark); color: #fff; text-decoration: none; font-size: 12px; font-weight: 700; box-shadow: 0 5px 16px #102c1c30; cursor: pointer; }
    .float-btn:hover { background: #0b4431; }
    .qr-pop { display: none; position: absolute; right: 58px; bottom: 0; width: 180px; padding: 10px; border: 1px solid var(--line); background: #fff; color: var(--ink); box-shadow: 0 8px 24px #16291d20; }
    .qr-pop img { display: block; width: 100%; height: auto; }
    .qr-pop p { margin: 7px 0 0; text-align: center; font-size: 12px; }
    .floating:hover .qr-pop, .floating:focus-within .qr-pop { display: block; }
    .back-top { display: none; }
    .back-top.visible { display: grid; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { opacity: 1; transform: none; }
    @keyframes drift { 0%,100% { transform: rotate(18deg) translateY(0); } 50% { transform: rotate(24deg) translateY(10px); } }
    @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: 980px) {
      .nav { min-height: 68px; }
      .menu-toggle { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 5px; cursor: pointer; }
      .nav-links { display: none; position: absolute; z-index: 8; top: 67px; left: 0; right: 0; padding: 12px max(20px, calc((100% - var(--content))/2)); background: var(--paper); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
      .nav-links.open { display: flex; }
      .nav-actions { margin-left: auto; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .industry-grid { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
      .nav-actions .button-outline { display: none; }
    }
    @media (max-width: 650px) {
      .container { width: min(var(--content), calc(100% - 30px)); }
      .brand span { font-size: 14px; }
      .ai-page-logo { width: 36px; }
      .nav-actions .button { min-height: 40px; padding: 8px 12px; font-size: 13px; }
      .hero-inner { padding: 57px 0 35px; }
      .hero-inner::before { width: 210px; height: 210px; right: -70px; top: 25px; }
      .hero-inner::after { width: 55px; height: 55px; right: 15%; top: 56px; }
      .hero-copy p { font-size: 16px; }
      .hero-bottom { grid-template-columns: 1fr 1fr; margin-top: 40px; }
      .metric { padding: 14px 8px 10px 0; }
      .metric + .metric { padding-left: 12px; }
      .metric:nth-child(3) { border-left: 0; padding-left: 0; border-top: 1px solid #c8d9c8; }
      .metric:nth-child(4) { border-top: 1px solid #c8d9c8; }
      .section { padding: 54px 0; }
      .section-heading { display: block; }
      .section-heading h2, .intro-grid h2, .network h2, .match-grid h2 { font-size: 28px; }
      .section-heading p { margin-top: 12px; }
      .intro-grid, .network, .match-grid { grid-template-columns: 1fr; gap: 25px; }
      .intro-list { gap: 0 12px; }
      .service-grid { grid-template-columns: 1fr; }
      .service { min-height: auto; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 12px; }
      .industry-grid { grid-template-columns: 1fr 1fr; gap: 0 14px; }
      .network-list { grid-template-columns: 1fr 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .case { grid-template-columns: 1fr; }
      .rating-band { grid-template-columns: 1fr; gap: 17px; padding: 22px; }
      .rating-score { border-right: 0; border-bottom: 1px solid #ffffff55; padding-bottom: 17px; }
      .reviews { grid-template-columns: 1fr; }
      form { grid-template-columns: 1fr; }
      .field-full, .form-submit { grid-column: auto; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .footer-main { display: block; }
      .footer-links { margin-top: 16px; }
      .floating { right: 10px; bottom: 10px; }
    }