:root {
      color-scheme: light;
      --ink: #183126;
      --muted: #607166;
      --green: #b7ed3d;
      --green-dark: #5d8c19;
      --green-deep: #285c36;
      --lime-pale: #eff8df;
      --paper: #f7fbf4;
      --white: #fff;
      --line: #dfe9da;
      --shadow: 0 16px 44px rgba(34, 73, 43, .09);
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background:
        radial-gradient(ellipse at 88% 8%, rgba(189, 237, 61, .17), transparent 30rem),
        linear-gradient(180deg, #f7fbf4 0%, #fbfdf9 46%, #f5f9f1 100%);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(250, 253, 247, .93);
      border-bottom: 1px solid rgba(220, 233, 215, .9);
      backdrop-filter: blur(14px);
    }
    .nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; text-decoration: none; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .brand-name { font-size: 18px; font-weight: 800; letter-spacing: .03em; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: nowrap; }
    .nav-links a { padding: 9px 10px; color: #44574a; font-size: 13px; text-decoration: none; white-space: nowrap; border-radius: 999px; transition: background .2s, color .2s; }
    .nav-links a:hover { color: var(--green-deep); background: var(--lime-pale); }
    .nav-links .nav-cta { margin-left: 10px; padding: 10px 17px; background: var(--green); color: #19341e; font-weight: 800; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 13px; background: white; color: var(--ink); cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 82px 0 58px; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border-radius: 50%; }
    .hero::before { width: 370px; height: 370px; right: -80px; top: 25px; background: radial-gradient(circle, rgba(183, 237, 61, .34), rgba(183, 237, 61, 0) 70%); animation: breathe 7s ease-in-out infinite; }
    .hero::after { width: 180px; height: 180px; right: 13%; bottom: 0; border: 1px solid rgba(93, 140, 25, .16); box-shadow: 0 0 0 24px rgba(93, 140, 25, .035), 0 0 0 48px rgba(93, 140, 25, .025); }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); align-items: center; gap: 54px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green-dark); font-weight: 800; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--green-dark); }
    h1 { max-width: 680px; margin: 18px 0 18px; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: -.045em; }
    h1 span { color: var(--green-dark); }
    .hero-copy { max-width: 620px; margin: 0; color: #52665a; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; gap: 13px; flex-wrap: wrap; margin-top: 29px; }
    .button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 12px 20px; border: 1px solid transparent; border-radius: 14px; text-decoration: none; font-weight: 800; transition: transform .2s, box-shadow .2s, background .2s; cursor: pointer; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(40, 92, 54, .15); }
    .button-primary { background: var(--green); color: #1a351e; }
    .button-secondary { background: rgba(255,255,255,.72); border-color: #dce8d5; color: var(--ink); }
    .hero-note { margin-top: 16px; color: #6c7c70; font-size: 13px; }
    .hero-panel { position: relative; padding: 25px; border: 1px solid rgba(208, 226, 198, .9); border-radius: 28px; background: rgba(255,255,255,.8); box-shadow: var(--shadow); }
    .hero-panel::before { content: ""; position: absolute; width: 78px; height: 78px; top: -18px; right: 22px; border: 1px solid #d8e9bd; border-radius: 22px; transform: rotate(16deg); z-index: -1; }
    .panel-label { color: var(--muted); font-size: 12px; font-weight: 700; }
    .panel-title { margin: 5px 0 17px; font-size: 21px; line-height: 1.4; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 6px 10px; border-radius: 999px; background: #f0f7e8; color: #365842; font-size: 12px; font-weight: 700; }
    .panel-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 20px; padding-top: 16px; border-top: 1px solid #e7eee2; color: #53685a; font-size: 13px; }
    .panel-foot strong { color: var(--green-dark); }
    .trust-strip { padding: 0 0 34px; }
    .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.75); overflow: hidden; }
    .trust-item { padding: 18px 20px; border-right: 1px solid var(--line); }
    .trust-item:last-child { border-right: 0; }
    .trust-item strong { display: block; font-size: 15px; }
    .trust-item span { color: var(--muted); font-size: 12px; }
    section.content-section { padding: 66px 0; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { margin: 0 0 8px; color: var(--green-dark); font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 40px); letter-spacing: -.035em; line-height: 1.2; }
    .section-intro { max-width: 650px; margin: 11px 0 0; color: var(--muted); }
    .text-link { color: var(--green-dark); font-weight: 800; text-decoration: none; white-space: nowrap; }
    .about-layout { display: grid; grid-template-columns: 1.02fr .98fr; gap: 32px; align-items: stretch; }
    .about-copy { padding: 32px; border-radius: 24px; background: #eaf5dd; }
    .about-copy p { margin: 0 0 14px; color: #425a49; }
    .about-copy p:last-child { margin-bottom: 0; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .capability { padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.78); }
    .capability strong { display: block; margin-bottom: 5px; font-size: 15px; }
    .capability span { color: var(--muted); font-size: 13px; }
    .services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-card { padding: 23px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.88); transition: transform .22s, box-shadow .22s, border-color .22s; }
    .service-card:hover { transform: translateY(-4px); border-color: #c4dfa7; box-shadow: var(--shadow); }
    .service-icon { display: grid; width: 40px; height: 40px; place-items: center; margin-bottom: 15px; border-radius: 13px; background: var(--lime-pale); color: var(--green-deep); font-size: 19px; font-weight: 900; }
    .service-card h3, .industry-card h3, .review-card h3, .step h3 { margin: 0 0 8px; font-size: 17px; }
    .service-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-card .tagline { display: block; margin-top: 12px; color: var(--green-dark); font-size: 12px; font-weight: 800; }
    .production-band { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; align-items: center; padding: 32px; border-radius: 26px; background: var(--green-deep); color: #f4f9ee; }
    .production-band h2 { max-width: 420px; }
    .production-band p { color: #d8e6d6; }
    .production-band .button-secondary { background: #f4f8ee; border-color: #f4f8ee; color: #23452d; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: steps; }
    .step { position: relative; padding: 23px 20px 20px; border-top: 2px solid #b7d897; background: rgba(255,255,255,.65); }
    .step::before { counter-increment: steps; content: "0" counter(steps); display: block; margin-bottom: 18px; color: var(--green-dark); font-size: 13px; font-weight: 900; letter-spacing: .08em; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .industry-card { padding: 18px; border-radius: 17px; background: #eef6e7; }
    .industry-card p { margin: 0; color: #5b6d5f; font-size: 13px; }
    .network-box { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; padding: 30px; border: 1px solid var(--line); border-radius: 24px; background: rgba(255,255,255,.8); }
    .network-box p { margin-top: 0; color: var(--muted); }
    .network-list { display: flex; flex-wrap: wrap; gap: 9px; align-content: start; }
    .network-list span { padding: 8px 12px; border: 1px solid #dce9d3; border-radius: 999px; background: #fbfdf9; color: #385842; font-size: 13px; }
    .showcase-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; align-items: stretch; }
    .showcase-card { overflow: hidden; border: 1px solid var(--line); border-radius: 21px; background: white; }
    .showcase-card img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
    .showcase-card.square img { aspect-ratio: 1; object-fit: cover; }
    .showcase-copy { padding: 18px 20px 20px; }
    .showcase-copy h3 { margin: 0 0 5px; font-size: 17px; }
    .showcase-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 16px; }
    .case-note { padding: 19px; border-left: 3px solid var(--green); background: #f0f7e9; }
    .case-note strong { display: block; margin-bottom: 5px; }
    .case-note span { color: var(--muted); font-size: 13px; }
    .evaluation { display: grid; grid-template-columns: .65fr 1.35fr; gap: 25px; align-items: stretch; }
    .score-panel { display: flex; flex-direction: column; justify-content: center; padding: 28px; border-radius: 23px; background: var(--green); color: #203c25; }
    .score-panel .stars { color: #355920; font-size: 22px; letter-spacing: .12em; }
    .score-panel strong { margin: 7px 0 0; font-size: 46px; line-height: 1.1; }
    .score-panel span { color: #36513a; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 20px; background: white; }
    table { width: 100%; min-width: 640px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid #e8eee4; vertical-align: top; }
    th { background: #eff6e9; color: #35513a; font-size: 13px; }
    td { color: #526458; font-size: 13px; }
    tr:last-child td { border-bottom: 0; }
    td:first-child { color: var(--ink); font-weight: 750; }
    .reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review-card { padding: 22px; border: 1px solid var(--line); border-radius: 19px; background: rgba(255,255,255,.86); }
    .review-card p { min-height: 88px; margin: 0 0 16px; color: #506257; font-size: 14px; }
    .review-card h3 { margin-bottom: 1px; font-size: 14px; }
    .review-card span { color: #77877b; font-size: 12px; }
    .review-mark { color: var(--green-dark); font-size: 23px; line-height: 1; }
    .resource-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
    .resource-box { padding: 24px; border: 1px solid var(--line); border-radius: 21px; background: white; }
    .resource-box h3 { margin: 0 0 13px; font-size: 18px; }
    .article-list { display: grid; gap: 0; }
    .article-list a { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid #edf1e9; color: #385643; text-decoration: none; font-size: 14px; }
    .article-list a:last-child { border-bottom: 0; }
    .article-list a::after { content: "↗"; color: var(--green-dark); }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
    details.faq-item { align-self: start; padding: 16px 18px; border: 1px solid var(--line); border-radius: 15px; background: rgba(255,255,255,.85); }
    details.faq-item summary { position: relative; padding-right: 27px; color: #253f2d; font-weight: 750; cursor: pointer; list-style: none; }
    details.faq-item summary::-webkit-details-marker { display: none; }
    details.faq-item summary::after { content: "+"; position: absolute; top: 0; right: 0; color: var(--green-dark); font-size: 20px; line-height: 1; transition: transform .2s; }
    details.faq-item[open] summary::after { transform: rotate(45deg); }
    details.faq-item p { margin: 11px 0 0; color: var(--muted); font-size: 14px; }
    .contact-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 24px; align-items: start; }
    .contact-card { padding: 27px; border-radius: 22px; background: #eaf5dd; }
    .contact-card h3 { margin: 0 0 12px; font-size: 21px; }
    .contact-card p { margin: 8px 0; color: #4e6554; }
    .contact-card a { color: #2f6338; font-weight: 750; }
    .qr-wrap { width: 142px; margin-top: 17px; padding: 8px; border-radius: 15px; background: white; }
    .qr-wrap img { display: block; width: 100%; height: auto; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 25px; border: 1px solid var(--line); border-radius: 22px; background: white; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #43594a; font-size: 13px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; min-height: 45px; padding: 10px 12px; border: 1px solid #dce6d8; border-radius: 11px; outline: none; background: #fbfdf9; color: var(--ink); }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #8db85c; box-shadow: 0 0 0 3px rgba(141,184,92,.15); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-submit { grid-column: 1 / -1; justify-self: start; border: 0; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 30px; border: 1px solid #d5e6c7; border-radius: 21px; background: #f0f7e9; }
    .join-band h3 { margin: 0 0 5px; font-size: 20px; }
    .join-band p { margin: 0; color: var(--muted); }
    .site-footer { margin-top: 12px; padding: 30px 0 24px; border-top: 1px solid #dce7d6; background: #eff5e9; color: #344b3a; }
    .footer-top { display: flex; justify-content: space-between; align-items: start; gap: 28px; }
    .footer-links { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px 17px; max-width: 600px; }
    .footer-links a { color: #45634c; font-size: 13px; text-decoration: none; }
    .footer-bottom { margin-top: 20px; padding-top: 14px; border-top: 1px solid #dce7d6; color: #65776a; font-size: 12px; }
    .floating-help { position: fixed; right: 20px; bottom: 20px; z-index: 15; display: grid; gap: 9px; }
    .floating-help a { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 15px; border: 1px solid #d9e7d0; border-radius: 999px; background: white; color: #2d5838; box-shadow: 0 8px 24px rgba(31, 65, 38, .12); font-size: 13px; font-weight: 800; text-decoration: none; transition: transform .2s; }
    .floating-help a:hover { transform: translateY(-2px); }
    .to-top { display: none !important; }
    .to-top.visible { display: inline-flex !important; }
    .reveal { opacity: 0; transform: translateY(15px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes breathe { 0%, 100% { transform: scale(.96); opacity: .72; } 50% { transform: scale(1.06); opacity: 1; } }
    @media (max-width: 1020px) {
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-links .nav-cta { margin-left: 5px; padding-inline: 12px; }
      .hero-grid { gap: 30px; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .nav-wrap { min-height: 68px; }
      .menu-toggle { display: inline-grid; place-items: center; font-size: 19px; }
      .nav-links { display: none; position: absolute; top: calc(100% + 1px); left: 0; right: 0; padding: 12px 15px 16px; border-bottom: 1px solid var(--line); background: #fbfdf9; box-shadow: 0 14px 22px rgba(30,60,35,.08); flex-direction: column; align-items: stretch; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 11px 12px; font-size: 14px; }
      .nav-links .nav-cta { margin: 5px 0 0; text-align: center; }
      .hero { padding: 60px 0 36px; }
      .hero-grid, .about-layout, .production-band, .evaluation, .resource-layout, .contact-layout { grid-template-columns: 1fr; }
      .hero-panel { max-width: 520px; }
      .hero::after { right: 3%; bottom: 35%; }
      .trust-grid { grid-template-columns: repeat(2, 1fr); }
      .trust-item:nth-child(2) { border-right: 0; }
      .trust-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      section.content-section { padding: 48px 0; }
      .section-head { align-items: start; flex-direction: column; gap: 12px; }
      .workflow { grid-template-columns: repeat(2, 1fr); }
      .showcase-grid { grid-template-columns: 1fr 1fr; }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .review-card p { min-height: 0; }
      .faq-list { grid-template-columns: 1fr; }
      .footer-top { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 520px) {
      .brand-name { font-size: 16px; }
      .hero-grid { gap: 25px; }
      .hero-copy { font-size: 15px; }
      .hero-panel { padding: 20px; }
      .trust-item { padding: 14px; }
      .trust-item strong { font-size: 14px; }
      .capability-list, .services-grid, .industry-grid, .showcase-grid, .case-row, .reviews-grid { grid-template-columns: 1fr; }
      .about-copy { padding: 23px; }
      .production-band { padding: 24px; }
      .network-box { grid-template-columns: 1fr; padding: 22px; gap: 12px; }
      .score-panel { min-height: 185px; }
      .contact-form { grid-template-columns: 1fr; padding: 19px; }
      .field.full, .form-submit { grid-column: auto; }
      .join-band { align-items: start; flex-direction: column; padding: 22px; }
      .floating-help { right: 12px; bottom: 12px; }
      .floating-help a { min-height: 40px; padding-inline: 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }