:root {
      color-scheme: light;
      --ink: #17251f;
      --muted: #63726b;
      --paper: #f8faf7;
      --white: #fff;
      --line: #dfe7df;
      --green: #166e4b;
      --green-dark: #10543a;
      --lime: #d8f36b;
      --orange: #ff815c;
      --blue: #dceeff;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      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;
      top: 0;
      z-index: 20;
      border-bottom: 1px solid rgba(223, 231, 223, .9);
      background: rgba(248, 250, 247, .95);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 72px; 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 { display: block; width: 40px; height: 40px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 9px 10px; color: #42544a; text-decoration: none; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--green); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 8px;
      color: var(--ink);
      background: var(--white);
      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: 6px;
      color: var(--white);
      background: var(--green);
      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); box-shadow: 0 8px 22px rgba(22, 110, 75, .18); transform: translateY(-2px); }
    .button-light { color: var(--ink); background: var(--white); border-color: var(--line); }
    .button-light:hover { color: var(--green); background: #f1f7f1; }
    .button-lime { color: var(--ink); background: var(--lime); }
    .button-lime:hover { color: var(--ink); background: #c8e852; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 70px 0 44px;
      background: #eaf5e9;
      border-bottom: 1px solid #d8e8d9;
    }
    .hero::before {
      position: absolute;
      inset: 0 0 auto auto;
      width: min(43vw, 530px);
      height: 100%;
      content: "";
      opacity: .65;
      background-image: linear-gradient(30deg, transparent 49.5%, #b8d8b7 49.8%, #b8d8b7 50.2%, transparent 50.5%), linear-gradient(150deg, transparent 49.5%, #c7dfbf 49.8%, #c7dfbf 50.2%, transparent 50.5%);
      background-size: 74px 74px;
      mask-image: linear-gradient(90deg, transparent, #000);
      pointer-events: none;
    }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(250px, .6fr); gap: 48px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 17px; color: var(--green); font-size: 13px; font-weight: 800; }
    .eyebrow::before { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); content: ""; }
    h1 { max-width: 760px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.1; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin: 22px 0 26px; color: #43584c; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin: 18px 0 0; color: #53675b; font-size: 13px; }
    .hero-stamp { display: grid; align-content: center; justify-items: start; gap: 14px; padding: 22px 0 22px 28px; border-left: 1px solid #b7d0b8; }
    .hero-stamp strong { color: var(--green-dark); font-size: 42px; line-height: 1; }
    .hero-stamp span { max-width: 240px; color: #53675b; font-size: 14px; }
    .hero-stamp .stamp-rule { width: 54px; height: 4px; border-radius: 4px; background: var(--orange); }
    .quick-strip { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 48px; border-top: 1px solid #c9ddc8; }
    .quick-stat { padding: 17px 18px 0 0; }
    .quick-stat strong { display: block; font-size: 16px; }
    .quick-stat span { color: var(--muted); font-size: 12px; }
    section { padding: 76px 0; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-kicker { display: block; margin-bottom: 7px; color: var(--green); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { max-width: 510px; margin: 0; color: var(--muted); }
    .intro-band { background: var(--white); }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: start; }
    .intro-copy { max-width: 540px; color: #48584f; }
    .intro-copy p { margin: 0 0 15px; }
    .intro-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; padding: 0; margin: 3px 0 0; list-style: none; }
    .intro-list li { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .intro-list b { display: block; margin-bottom: 3px; }
    .intro-list span { color: var(--muted); }
    .service-section { background: #f1f6ef; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .service-item { min-width: 0; padding: 21px 21px 20px; border: 1px solid #dce6da; border-radius: 5px; background: var(--white); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
    .service-item:hover { transform: translateY(-3px); border-color: #a8c8a8; box-shadow: 0 12px 25px rgba(32, 66, 43, .08); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-index { display: inline-block; margin-bottom: 15px; color: #688d45; font-size: 11px; font-weight: 800; }
    .model-line { padding: 24px 0 0; color: var(--muted); font-size: 13px; }
    .model-line strong { margin-right: 10px; color: var(--ink); }
    .model-list { color: #43584c; word-spacing: 7px; }
    .production-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
    .production-copy { padding: 24px 0; }
    .production-copy p { color: var(--muted); }
    .production-copy .button { margin-top: 8px; }
    .production-list { border-top: 1px solid var(--line); }
    .production-row { display: grid; grid-template-columns: 145px 1fr; gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .production-row strong { font-size: 14px; }
    .production-row span { color: var(--muted); font-size: 13px; }
    .solutions { background: #eaf4ee; }
    .solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .solution { padding-top: 17px; border-top: 3px solid var(--green); }
    .solution:nth-child(2) { border-color: var(--orange); }
    .solution:nth-child(3) { border-color: #568cc2; }
    .solution:nth-child(4) { border-color: #94b431; }
    .solution h3 { margin: 0 0 8px; font-size: 17px; }
    .solution p { margin: 0; color: var(--muted); font-size: 13px; }
    .network-band { color: #f5fbf6; background: #174d39; }
    .network-band .section-kicker { color: #d8f36b; }
    .network-band .section-head p { color: #c5d9cb; }
    .network-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
    .network-content p { margin-top: 0; color: #d5e4d9; }
    .network-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
    .network-point { padding: 13px 0; border-top: 1px solid rgba(255,255,255,.25); color: #f5fbf6; font-size: 14px; }
    .process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .process-step { padding-top: 16px; border-top: 1px solid #afc5b5; }
    .process-step .number { display: inline-block; margin-bottom: 16px; color: var(--green); font-size: 12px; font-weight: 900; }
    .process-step h3 { margin: 0 0 6px; font-size: 16px; }
    .process-step p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-section { background: var(--white); }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .case-item { overflow: hidden; border: 1px solid var(--line); border-radius: 5px; background: #f8faf7; }
    .case-visual { display: flex; align-items: end; min-height: 145px; padding: 18px; color: #173b2b; background: linear-gradient(135deg, #d8efdd, #eef3c9); }
    .case-item:nth-child(2) .case-visual { background: linear-gradient(135deg, #dceeff, #e5f0d9); }
    .case-item:nth-child(3) .case-visual { background: linear-gradient(135deg, #ffe2d5, #fff0cf); }
    .case-visual span { font-size: 12px; font-weight: 800; }
    .case-text { padding: 18px; }
    .case-text h3 { margin: 0 0 6px; font-size: 17px; }
    .case-text p { margin: 0; color: var(--muted); font-size: 13px; }
    .review-section { background: #f3f6f1; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px 30px; }
    .review { padding: 18px 0; border-top: 1px solid #bdcbbd; }
    .review blockquote { margin: 0 0 14px; color: #34463b; font-size: 14px; }
    .review cite { color: var(--muted); font-size: 12px; font-style: normal; }
    .rating-panel { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-bottom: 28px; padding: 18px 22px; border-left: 4px solid var(--orange); background: #fff4ed; }
    .rating-score { color: #a74c28; font-size: 38px; font-weight: 850; line-height: 1; }
    .rating-meta strong { display: block; }
    .rating-stars { color: #ca6a31; letter-spacing: 0; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); }
    table { width: 100%; min-width: 660px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 17px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 13px; }
    th { color: #34463b; background: #edf4eb; font-weight: 800; }
    td:first-child { width: 23%; font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .match-band { background: #e8f2fb; }
    .match-layout { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; }
    .match-layout p { max-width: 670px; margin: 12px 0 0; color: #4c6375; }
    .token-section { padding-top: 58px; padding-bottom: 58px; background: #fff; }
    .token-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 28px; align-items: center; padding: 22px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .token-row strong { display: block; }
    .token-row span { color: var(--muted); font-size: 13px; }
    .price-note { color: var(--muted); font-size: 12px; }
    .faq-section { background: #f1f6ef; }
    .faq-list { border-top: 1px solid #cbd8ca; }
    details { border-bottom: 1px solid #cbd8ca; }
    summary { display: flex; justify-content: space-between; gap: 18px; align-items: center; padding: 17px 2px; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--green); font-size: 22px; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 820px; margin: -3px 0 18px; color: var(--muted); font-size: 14px; }
    .knowledge-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 46px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; align-content: start; }
    .tag-cloud a { padding: 7px 11px; border: 1px solid #d7e2d7; border-radius: 4px; color: #3e5848; background: #fff; text-decoration: none; font-size: 12px; }
    .tag-cloud a:hover { border-color: #93b59a; color: var(--green); }
    .article-list { border-top: 1px solid var(--line); }
    .article-link { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
    .article-link span { font-weight: 650; }
    .article-link small { flex: 0 0 auto; color: var(--muted); }
    .contact-section { color: #f5fbf6; background: #153e30; }
    .contact-section .section-kicker { color: var(--lime); }
    .contact-section .section-head p { color: #c2d6c9; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
    .contact-details { display: grid; gap: 0; }
    .contact-detail { padding: 15px 0; border-top: 1px solid rgba(255,255,255,.22); }
    .contact-detail strong { display: block; margin-bottom: 3px; color: #d8f36b; font-size: 12px; }
    .contact-detail span, .contact-detail a { color: #f5fbf6; font-size: 14px; }
    .contact-form { padding: 22px; border-radius: 5px; color: var(--ink); background: #fff; }
    .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: 12px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; min-height: 43px; padding: 10px 11px; border: 1px solid #d4ddd5; border-radius: 4px; color: var(--ink); background: #fff; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #398460; box-shadow: 0 0 0 3px rgba(57,132,96,.13); }
    .field textarea { min-height: 105px; resize: vertical; }
    .contact-form .button { width: 100%; margin-top: 14px; }
    .footer { padding: 24px 0; color: #354a3c; background: #e8eee6; }
    .footer-main { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; align-items: center; }
    .footer-brand { font-weight: 800; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
    .footer-links a { color: #526458; font-size: 12px; text-decoration: none; }
    .footer-links a:hover { color: var(--green); }
    .copyright { margin: 13px 0 0; color: #68776b; font-size: 11px; }
    .float-contact {
      position: fixed;
      right: 18px;
      bottom: 20px;
      z-index: 18;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .float-contact a { display: grid; width: 46px; height: 46px; place-items: center; border: 1px solid #d6e2d7; border-radius: 50%; color: var(--green-dark); background: #fff; box-shadow: 0 5px 18px rgba(25,58,39,.12); text-decoration: none; font-size: 12px; font-weight: 800; }
    .to-top { opacity: 0; pointer-events: none; transform: translateY(6px); transition: opacity .2s ease, transform .2s ease; }
    .to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s 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: 980px) {
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-actions .button { padding-inline: 13px; }
      .hero-inner { grid-template-columns: 1fr 260px; gap: 28px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .solution-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-actions .button { display: none; }
      .nav-links { display: none; position: absolute; top: 63px; right: 16px; left: 16px; padding: 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; box-shadow: 0 12px 30px rgba(20,50,30,.12); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 11px; border-bottom: 1px solid #edf1ed; font-size: 13px; }
      .hero { padding-top: 54px; }
      .hero-inner { grid-template-columns: 1fr; gap: 25px; }
      .hero-stamp { display: flex; align-items: center; gap: 13px; padding: 15px 0 0; border-top: 1px solid #b7d0b8; border-left: 0; }
      .hero-stamp strong { font-size: 30px; }
      .hero-stamp span { max-width: none; }
      .quick-strip { grid-template-columns: repeat(2, 1fr); row-gap: 12px; margin-top: 32px; }
      .quick-stat { padding-top: 12px; }
      section { padding: 58px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .intro-grid, .production-layout, .network-content, .knowledge-grid, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .case-grid { grid-template-columns: 1fr; }
      .case-visual { min-height: 115px; }
      .review-grid { grid-template-columns: repeat(2, 1fr); gap: 10px 20px; }
      .process { grid-template-columns: repeat(2, 1fr); gap: 22px; }
      .match-layout { grid-template-columns: 1fr; }
      .match-layout .button { justify-self: start; }
      .token-row { grid-template-columns: 1fr 1fr; }
      .token-row .button { grid-column: 1 / -1; justify-self: start; }
    }
    @media (max-width: 480px) {
      .hero-actions .button { width: 100%; }
      h1 { font-size: 38px; }
      .intro-list, .service-grid, .solution-grid, .review-grid, .process, .network-points { grid-template-columns: 1fr; }
      .production-row { grid-template-columns: 1fr; gap: 4px; }
      .form-grid { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .token-row { grid-template-columns: 1fr; gap: 12px; }
      .token-row .button { grid-column: auto; }
      .footer-main { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
    }