:root {
      color-scheme: light;
      --ink: #20231d;
      --muted: #62665f;
      --paper: #fffef9;
      --line: #e7e5da;
      --yellow: #f4c900;
      --yellow-dark: #d6ae00;
      --green: #244b3b;
      --green-soft: #eaf1e9;
      --coral: #db6a4c;
      --content: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    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; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--content), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      border-bottom: 1px solid rgba(32,35,29,.1);
      background: rgba(255,254,249,.96);
      backdrop-filter: blur(12px);
    }
    .header-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 40px; max-height: 40px; object-fit: contain; }
    .nav-area { display: flex; align-items: center; justify-content: flex-end; gap: 20px; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 10px 9px; color: #42463f; font-size: 13px; text-decoration: none; transition: color .2s ease; }
    .nav-links a:hover { color: #927600; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: white; color: var(--ink); cursor: pointer; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 20px; border: 1px solid var(--ink);
      background: var(--ink); color: white; text-decoration: none; font-weight: 700;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 7px 18px rgba(32,35,29,.15); }
    .button-yellow { border-color: var(--yellow); background: var(--yellow); color: var(--ink); }
    .button-light { border-color: rgba(255,255,255,.5); background: transparent; color: white; }
    .hero {
      position: relative; overflow: hidden; background: var(--yellow);
      border-bottom: 1px solid rgba(32,35,29,.12);
    }
    .hero::after {
      position: absolute; top: -150px; right: -115px; width: 440px; height: 440px;
      border: 1px solid rgba(32,35,29,.16); border-radius: 50%; content: "";
      box-shadow: 0 0 0 34px rgba(32,35,29,.035), 0 0 0 70px rgba(32,35,29,.025);
      pointer-events: none;
    }
    .hero-inner { position: relative; z-index: 1; padding-block: 78px 66px; }
    .hero-label { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 20px; font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .hero-label::before { width: 25px; height: 3px; background: var(--ink); content: ""; }
    h1 { max-width: 800px; margin: 0; font-size: clamp(38px, 7vw, 76px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 670px; margin: 22px 0 28px; color: #34362f; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 620px; margin-top: 48px; border-top: 1px solid rgba(32,35,29,.27); }
    .hero-stat { padding: 16px 15px 0 0; }
    .hero-stat strong { display: block; font-size: 18px; }
    .hero-stat span { color: #494a40; font-size: 12px; }
    .section { padding-block: 72px; }
    .section-tint { background: #f2f3e9; border-block: 1px solid #e7e8dc; }
    .section-dark { background: var(--green); color: white; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .eyebrow { margin: 0 0 8px; color: #897300; font-size: 12px; font-weight: 800; }
    .section-dark .eyebrow { color: #f4d638; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { max-width: 560px; margin: 11px 0 0; color: var(--muted); }
    .section-dark .section-intro { color: #e2e9e1; }
    h3 { margin: 0 0 9px; font-size: 18px; line-height: 1.35; }
    p { margin-top: 0; }
    .split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .intro-copy { max-width: 590px; color: var(--muted); }
    .intro-copy p:last-child { margin-bottom: 0; }
    .feature-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .feature-list li { padding: 13px 0; border-top: 1px solid var(--line); font-weight: 650; }
    .feature-list li::before { display: inline-block; width: 8px; height: 8px; margin-right: 10px; background: var(--yellow-dark); content: ""; }
    .service-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .service-item { min-height: 150px; padding: 22px; background: white; transition: background .2s ease, transform .2s ease; }
    .service-item:hover { position: relative; z-index: 1; background: #fffbee; transform: translateY(-3px); }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-index { display: block; margin-bottom: 15px; color: #8c7800; font-size: 12px; font-weight: 800; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 20px; counter-reset: steps; }
    .workflow-step { padding-top: 18px; border-top: 2px solid var(--ink); counter-increment: steps; }
    .workflow-step::before { display: block; margin-bottom: 18px; color: #897300; content: "0" counter(steps); font-size: 13px; font-weight: 800; }
    .workflow-step p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 36px; }
    .industry-row { display: grid; grid-template-columns: 110px 1fr; gap: 18px; padding: 17px 0; border-top: 1px solid var(--line); }
    .industry-row strong { font-size: 14px; }
    .industry-row span { color: var(--muted); font-size: 14px; }
    .network-band { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 25px; }
    .network-band span { padding: 7px 11px; border: 1px solid rgba(255,255,255,.35); color: white; font-size: 13px; }
    .network-note { margin: 18px 0 0; color: #e2e9e1; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .case { overflow: hidden; background: white; border: 1px solid var(--line); }
    .case img { display: block; width: 100%; aspect-ratio: 16 / 8; object-fit: cover; }
    .case-body { padding: 20px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-square { display: grid; grid-template-columns: 180px 1fr; gap: 20px; align-items: center; margin-top: 20px; padding: 18px; border: 1px solid var(--line); background: #fff; }
    .case-square img { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; }
    .rating-row { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
    .rating { display: flex; align-items: baseline; gap: 8px; }
    .rating strong { font-size: 46px; line-height: 1; }
    .rating span { color: var(--muted); }
    .stars { color: #aa8700; font-size: 22px; letter-spacing: 0; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #f3f2e9; font-size: 13px; }
    td { color: #44483f; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1px; border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.22); }
    .review { min-height: 180px; padding: 22px; background: var(--green); }
    .review p { margin: 0 0 18px; color: #f0f4ed; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: #d3dfd1; font-size: 12px; }
    .article-list { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 16px; }
    .article-link { display: flex; min-height: 120px; flex-direction: column; justify-content: space-between; padding: 16px; border-top: 2px solid var(--yellow-dark); background: white; text-decoration: none; }
    .article-link strong { font-size: 15px; }
    .article-link span { color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 36px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { position: absolute; top: 14px; right: 4px; content: "+"; color: #927600; font-size: 22px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 35px 18px 0; color: var(--muted); font-size: 14px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .tag-cloud span { padding: 7px 11px; border: 1px solid #d8d9cf; background: white; color: #3e443b; font-size: 13px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-details { display: grid; gap: 14px; margin-top: 22px; }
    .contact-details p { margin: 0; color: var(--muted); }
    .contact-details a { color: var(--ink); font-weight: 700; }
    .qr-image { display: block; width: 150px; margin-top: 8px; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #d7d8ce; border-radius: 0; background: white; color: var(--ink); }
    .field textarea { min-height: 120px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--yellow-dark); outline-offset: 1px; }
    .submit-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 16px; }
    .form-note { margin: 0; color: var(--muted); font-size: 12px; }
    .partner-links { display: flex; flex-wrap: wrap; gap: 12px 20px; }
    .partner-links a { color: #39483d; font-size: 14px; }
    .partner-links a:hover { color: #8b7000; }
    .site-footer { padding: 23px 0; background: #e9ebdf; color: #30362f; font-size: 13px; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .footer-row p { margin: 0; }
    .float-contact { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .float-contact a { min-width: 46px; padding: 11px 13px; border: 1px solid var(--ink); background: var(--yellow); color: var(--ink); font-size: 13px; font-weight: 800; text-align: center; text-decoration: none; }
    .float-contact a:last-child { background: var(--ink); color: white; }
    .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; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 960px) {
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-area { gap: 10px; }
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; align-items: stretch; padding: 10px 20px 16px; border-bottom: 1px solid var(--line); background: var(--paper); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); }
      .nav-links a { padding: 10px; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .article-list { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--content), calc(100% - 28px)); }
      .header-row { min-height: 64px; gap: 10px; }
      .brand { font-size: 14px; }
      .ai-page-logo { width: 34px; max-height: 34px; }
      .nav-links { top: 64px; }
      .nav-links.is-open { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .nav-area > .button { min-height: 40px; padding-inline: 12px; font-size: 12px; }
      .hero-inner { padding-block: 58px 44px; }
      .hero-copy { font-size: 15px; }
      .hero-stats { margin-top: 34px; }
      .hero-stat { padding-right: 7px; }
      .hero-stat strong { font-size: 15px; }
      .section { padding-block: 54px; }
      .section-head { display: block; margin-bottom: 23px; }
      .split, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .feature-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, minmax(0,1fr)); row-gap: 26px; }
      .industry-grid { grid-template-columns: 1fr; }
      .industry-row { grid-template-columns: 92px 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .case-square { grid-template-columns: 112px 1fr; gap: 14px; padding: 12px; }
      .rating-row { align-items: start; flex-direction: column; }
      .review-grid { grid-template-columns: 1fr; }
      .review { min-height: auto; }
      .article-list { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
      .article-link { min-height: 112px; padding: 13px; }
      .form-grid { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .footer-row { align-items: start; flex-direction: column; }
      .float-contact { right: 10px; bottom: 10px; }
      .float-contact a { padding: 9px 10px; }
    }