:root {
      color-scheme: light;
      --ink: #182321;
      --muted: #5e6d68;
      --paper: #f7f9f8;
      --white: #fff;
      --line: #dce5e1;
      --green: #b9f55b;
      --teal: #0b7969;
      --coral: #ff745e;
      --violet: #7558db;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font: 16px/1.65 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { display: block; 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;
      border-bottom: 1px solid rgba(220,229,225,.9);
      background: rgba(247,249,248,.94);
      backdrop-filter: blur(14px);
    }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { width: 42px; max-height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; gap: 0; list-style: none; margin: 0; padding: 0; }
    .nav-links a { display: block; padding: 10px 11px; text-decoration: none; font-size: 14px; color: #43514c; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--teal); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 6px; background: var(--white); color: var(--ink); cursor: pointer; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 9px;
      min-height: 46px; padding: 0 19px; border: 1px solid transparent; border-radius: 5px;
      text-decoration: none; font-weight: 750; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(24,35,33,.12); }
    .button-primary { color: #142017; background: var(--green); }
    .button-dark { color: #fff; background: var(--ink); }
    .button-outline { border-color: #a8b9b2; color: var(--ink); background: transparent; }
    .hero {
      position: relative; overflow: hidden; padding: 76px 0 50px;
      background: linear-gradient(120deg,#f2fae8 0%,#eff8f5 48%,#f4f0ff 100%);
      border-bottom: 1px solid var(--line);
    }
    .hero::before {
      content: ""; position: absolute; width: 330px; height: 330px; right: 5%; top: 10%;
      border: 1px solid rgba(11,121,105,.18); border-radius: 50%;
      box-shadow: 0 0 0 35px rgba(11,121,105,.035), 0 0 0 72px rgba(117,88,219,.03);
      pointer-events: none;
    }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0,1.3fr) minmax(260px,.7fr); gap: 52px; align-items: center; }
    .eyebrow { margin: 0 0 16px; color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    h1 { max-width: 680px; margin: 0; font-size: clamp(42px,6vw,70px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 670px; margin: 22px 0 28px; color: #495a54; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin: 19px 0 0; color: var(--muted); font-size: 13px; }
    .hero-panel { position: relative; padding: 25px 0 25px 27px; border-left: 2px solid var(--teal); }
    .hero-panel strong { display: block; max-width: 280px; font-size: 24px; line-height: 1.35; }
    .hero-panel p { margin: 12px 0 0; color: var(--muted); }
    .hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .hero-tags span { padding: 6px 10px; border: 1px solid #c5d9d0; border-radius: 3px; background: rgba(255,255,255,.62); font-size: 13px; }
    .signal-strip { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 58px; border-top: 1px solid #d4e0db; }
    .signal { padding: 19px 18px 0 0; }
    .signal strong { display: block; font-size: 19px; }
    .signal span { color: var(--muted); font-size: 13px; }
    section.content-section { padding: 76px 0; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { max-width: 700px; margin: 0; font-size: clamp(28px,4vw,42px); line-height: 1.18; }
    .section-head p { max-width: 490px; margin: 0; color: var(--muted); }
    .kicker { display: block; margin-bottom: 10px; color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    .intro-band { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: start; }
    .intro-band h2 { margin: 0; font-size: 36px; line-height: 1.2; }
    .intro-band p { margin: 0 0 14px; color: var(--muted); }
    .service-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0 22px; border-top: 1px solid var(--line); }
    .service-item { padding: 23px 8px 23px 0; border-bottom: 1px solid var(--line); transition: transform .2s ease; }
    .service-item:hover { transform: translateY(-3px); }
    .service-item h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-num { display: block; margin-bottom: 11px; color: var(--teal); font-size: 12px; font-weight: 800; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); border-block: 1px solid var(--line); }
    .step { position: relative; padding: 24px 20px 25px 0; }
    .step + .step { padding-left: 22px; border-left: 1px solid var(--line); }
    .step span { color: var(--teal); font-size: 13px; font-weight: 800; }
    .step h3 { margin: 8px 0; font-size: 18px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
    .industry { min-height: 108px; padding: 17px; border-left: 3px solid var(--green); background: #fff; }
    .industry strong { display: block; margin-bottom: 5px; }
    .industry span { color: var(--muted); font-size: 13px; }
    .network { display: flex; flex-wrap: wrap; gap: 9px; }
    .network span { padding: 9px 13px; border: 1px solid var(--line); background: #fff; font-size: 14px; }
    .split-band { background: #edf4ef; border-block: 1px solid var(--line); }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; }
    th, td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    th { background: #eaf6dd; font-size: 14px; }
    td { color: #43514c; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-bottom: 24px; }
    .rating-score { font-size: 39px; font-weight: 850; line-height: 1; }
    .stars { color: #d89e18; letter-spacing: 2px; font-size: 22px; }
    .rating small { color: var(--muted); }
    .case-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 18px; }
    .case { overflow: hidden; background: #fff; border-bottom: 2px solid var(--green); }
    .case img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .case-copy { padding: 17px; }
    .case-copy h3 { margin: 0 0 7px; font-size: 18px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .reviews { display: grid; grid-template-columns: repeat(3,1fr); gap: 0 20px; border-top: 1px solid var(--line); }
    .review { padding: 21px 16px 22px 0; border-bottom: 1px solid var(--line); }
    .review p { margin: 0 0 13px; color: #3e4d47; }
    .review strong { display: block; font-size: 14px; }
    .review span { color: var(--muted); font-size: 13px; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; }
    .article-list a { display: flex; min-height: 110px; flex-direction: column; justify-content: space-between; padding: 15px; border: 1px solid var(--line); background: #fff; text-decoration: none; font-weight: 700; }
    .article-list a span { color: var(--teal); font-size: 12px; font-weight: 700; }
    .article-list a:hover { border-color: var(--teal); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 18px 36px 18px 0; cursor: pointer; font-weight: 750; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 12px; color: var(--teal); font-size: 24px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 850px; margin: -3px 0 18px; color: var(--muted); }
    .form-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; align-items: start; }
    .form-copy h2 { margin: 0 0 14px; font-size: 36px; line-height: 1.2; }
    .form-copy p { color: var(--muted); }
    .form-copy a { color: var(--teal); }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #cbd7d2; border-radius: 3px; padding: 11px 12px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 118px; resize: vertical; }
    .contact-form .button { justify-self: start; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 0; border-top: 1px solid var(--line); }
    .join-band h2 { margin: 0; font-size: 24px; }
    .join-band p { margin: 5px 0 0; color: var(--muted); }
    .site-footer { padding: 30px 0; border-top: 1px solid var(--line); background: #eaf0ed; color: #26332e; }
    .footer-main { display: flex; align-items: start; justify-content: space-between; gap: 30px; }
    .footer-main p { margin: 8px 0; color: #53615b; font-size: 14px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 17px; max-width: 550px; }
    .footer-links a { color: #31564c; font-size: 13px; }
    .copyright { margin-top: 19px; padding-top: 14px; border-top: 1px solid #d2ddd7; color: #53615b; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; }
    .float-contact a { display: inline-flex; align-items: center; gap: 8px; padding: 11px 15px; border: 1px solid #a8c777; border-radius: 4px; background: var(--green); color: var(--ink); text-decoration: none; font-weight: 800; box-shadow: 0 7px 24px rgba(24,35,33,.13); }
    .to-top { position: fixed; right: 22px; bottom: 82px; display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); cursor: pointer; }
    .to-top.visible { display: block; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 75px; left: 20px; right: 20px; padding: 10px; border: 1px solid var(--line); background: #fff; box-shadow: 0 12px 28px rgba(24,35,33,.1); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3,1fr); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .hero-inner { gap: 25px; }
      .industry-grid { grid-template-columns: repeat(2,1fr); }
      .case-grid { grid-template-columns: repeat(2,1fr); }
      .case:first-child { grid-column: 1 / -1; }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .header-inner { min-height: 66px; }
      .nav-links { top: 65px; left: 15px; right: 15px; }
      .nav-links.open { grid-template-columns: repeat(2,1fr); }
      .nav-actions .button { display: none; }
      .hero { padding: 55px 0 35px; }
      .hero-inner, .intro-band, .form-layout { grid-template-columns: 1fr; }
      .hero-inner { gap: 31px; }
      h1 { font-size: 43px; }
      .hero-copy { font-size: 16px; }
      .hero-panel { padding-block: 8px; }
      .signal-strip { grid-template-columns: repeat(2,1fr); margin-top: 36px; row-gap: 17px; }
      section.content-section { padding: 55px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .intro-band { gap: 18px; }
      .intro-band h2, .form-copy h2 { font-size: 30px; }
      .service-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 14px; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step, .step + .step { padding: 18px 12px 18px 0; border-left: 0; }
      .industry-grid { gap: 8px; }
      .industry { min-height: 96px; padding: 12px; }
      .case-grid { grid-template-columns: 1fr; }
      .case:first-child { grid-column: auto; }
      .reviews { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .form-layout { gap: 24px; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .join-band, .footer-main { align-items: start; flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
      .to-top { right: 17px; bottom: 72px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }