:root {
      color-scheme: light;
      --ink: #27231f;
      --muted: #6c625a;
      --paper: #fffaf5;
      --white: #fff;
      --orange: #f16a28;
      --orange-dark: #bc4215;
      --peach: #ffe8d8;
      --line: #eaded3;
      --green: #386b57;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,250,245,.96);
      border-bottom: 1px solid rgba(234,222,211,.85);
      backdrop-filter: blur(14px);
    }
    .header-inner { 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; }
    .ai-page-logo { display: block; max-width: 100%; height: auto; width: 42px; max-height: 42px; object-fit: contain; }
    .brand-name { font-size: 17px; font-weight: 800; }
    .brand-caption { display: block; color: var(--muted); font-size: 11px; line-height: 1.2; }
    .nav-wrap { display: flex; align-items: center; gap: 16px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 10px 9px; color: #51483f; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--orange-dark); }
    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 46px;
      padding: 0 19px;
      border: 1px solid transparent;
      border-radius: 4px;
      background: var(--orange);
      color: #fff;
      font-weight: 750;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .button:hover { transform: translateY(-2px); background: var(--orange-dark); box-shadow: 0 9px 22px rgba(190,72,24,.2); }
    .button-outline { border-color: #d7c5b6; background: transparent; color: var(--ink); }
    .button-outline:hover { background: #fff; color: var(--orange-dark); }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); width: 42px; height: 42px; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 72px 0 52px;
      background-color: #fff3e9;
      background-image: linear-gradient(118deg, #fff8f1 0%, #ffe5d2 55%, #fff4ea 100%);
      border-bottom: 1px solid #f0ddcc;
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(195,81,32,.15); border-radius: 50%; }
    .hero::before { width: 410px; height: 410px; right: -108px; top: -232px; }
    .hero::after { width: 280px; height: 280px; right: -44px; top: -168px; }
    .hero-content { position: relative; max-width: 790px; z-index: 1; }
    .eyebrow { margin: 0 0 16px; color: var(--orange-dark); font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; }
    h1 { max-width: 700px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; }
    .hero-lede { max-width: 670px; margin: 22px 0 26px; color: #574a41; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin: 16px 0 0; color: #72645a; font-size: 13px; }
    .hero-stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; margin-top: 52px; border-top: 1px solid rgba(188,66,21,.2); }
    .stat { padding: 19px 20px 0 0; }
    .stat + .stat { padding-left: 20px; border-left: 1px solid rgba(188,66,21,.2); }
    .stat strong { display: block; font-size: 21px; line-height: 1.3; }
    .stat span { color: var(--muted); font-size: 12px; }
    .section { padding: 76px 0; }
    .section-alt { background: #fff; border-block: 1px solid #f0e7df; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 700px; }
    .section-kicker { margin: 0 0 7px; color: var(--orange-dark); font-size: 12px; font-weight: 800; letter-spacing: 1.1px; }
    h2 { margin: 0; font-size: clamp(28px, 4vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { margin: 12px 0 0; color: var(--muted); max-width: 700px; }
    h3 { margin: 0 0 9px; font-size: 18px; line-height: 1.35; }
    .about-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: start; }
    .about-copy p { color: var(--muted); margin: 0 0 14px; }
    .about-callout { margin-top: 22px; padding: 16px 18px; border-left: 3px solid var(--orange); background: #fff1e6; color: #51433a; }
    .feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .feature { padding: 20px; border: 1px solid var(--line); background: #fff; border-radius: 4px; transition: transform .2s ease, box-shadow .2s ease; }
    .feature:hover, .service-item:hover, .quote:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(76,49,29,.08); }
    .feature-mark { width: 33px; height: 4px; margin-bottom: 14px; background: var(--orange); }
    .feature p, .service-item p, .step p, .quote p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
    .service-item { padding: 19px; background: #fff; border: 1px solid var(--line); border-radius: 4px; transition: transform .2s ease, box-shadow .2s ease; }
    .service-item h3 { display: flex; align-items: center; gap: 9px; font-size: 16px; }
    .service-item h3::before { content: ""; flex: 0 0 7px; width: 7px; height: 7px; border-radius: 50%; background: var(--orange); }
    .service-item p { font-size: 13px; }
    .service-more { margin-top: 20px; color: var(--muted); font-size: 13px; }
    .service-more strong { color: var(--ink); }
    .workflow-band { padding: 30px; background: #302a25; color: #fff8f2; border-radius: 4px; }
    .workflow-band .section-kicker { color: #ffb17d; }
    .workflow-band .section-intro { color: #d8cbc1; }
    .steps { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 22px; margin-top: 28px; }
    .step { position: relative; border-top: 1px solid #6d5a4d; padding-top: 15px; }
    .step-number { color: #ffae78; font-size: 12px; font-weight: 800; }
    .step h3 { margin-top: 7px; color: #fff; }
    .step p { color: #d5c9c0; }
    .showcase-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 16px; }
    .showcase { overflow: hidden; border: 1px solid var(--line); background: #fff; border-radius: 4px; }
    .showcase img { display: block; width: 100%; aspect-ratio: 16 / 8; object-fit: cover; }
    .showcase.square img { aspect-ratio: 1 / 1; }
    .showcase-copy { padding: 18px; }
    .showcase-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .showcase-stack { display: grid; gap: 16px; }
    .showcase-stack .showcase img { aspect-ratio: 16 / 7; }
    .reviews { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 13px; }
    .quote { padding: 19px; border-top: 2px solid var(--orange); background: #fff; border-radius: 2px; transition: transform .2s ease, box-shadow .2s ease; }
    .quote p { font-size: 14px; }
    .quote footer { margin-top: 15px; color: var(--ink); font-size: 13px; font-weight: 750; }
    .quote footer span { display: block; color: var(--muted); font-size: 12px; font-weight: 400; }
    .review-note { color: var(--muted); font-size: 12px; margin: 16px 0 0; }
    .comparison { display: grid; grid-template-columns: .72fr 1.28fr; gap: 25px; align-items: start; }
    .score-panel { padding: 25px; color: #fff; background: var(--orange-dark); border-radius: 4px; }
    .score-panel .score { margin: 5px 0 1px; font-size: 52px; font-weight: 850; line-height: 1; }
    .stars { color: #ffe09b; font-size: 23px; letter-spacing: 2px; }
    .score-panel p { margin: 12px 0 0; color: #fff1e7; font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 560px; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #eee5de; vertical-align: top; font-size: 13px; }
    th { background: #fff3e9; color: #593b29; font-size: 12px; }
    tbody tr:last-child td { border-bottom: 0; }
    .good { color: var(--green); font-weight: 750; }
    .token-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
    .token-note { color: var(--muted); }
    .token-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .token-list span { padding: 7px 10px; border: 1px solid #e4d6ca; color: #55483f; background: #fff; font-size: 12px; }
    .token-box { padding: 24px; border-left: 4px solid var(--orange); background: #fff1e6; }
    .token-box strong { display: block; margin-bottom: 8px; font-size: 18px; }
    .token-box p { color: var(--muted); margin: 0; font-size: 14px; }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .contact-details { margin-top: 22px; display: grid; gap: 12px; color: var(--muted); font-size: 14px; }
    .contact-details strong { color: var(--ink); }
    .contact-qr { width: 132px; margin-top: 18px; padding: 7px; background: white; border: 1px solid var(--line); }
    .contact-qr img { display: block; width: 100%; }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { color: #51483f; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; min-width: 0; border: 1px solid #dcd0c5; border-radius: 3px; background: #fff; color: var(--ink); padding: 11px 12px; outline: none; }
    input:focus, select:focus, textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(241,106,40,.12); }
    textarea { min-height: 112px; resize: vertical; }
    form button { grid-column: 1 / -1; justify-self: start; cursor: pointer; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 34px 17px 0; font-weight: 750; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 5px; top: 14px; color: var(--orange-dark); font-size: 21px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; padding: 0 25px 17px 0; color: var(--muted); font-size: 14px; }
    .article-links { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 10px; }
    .article-link { min-height: 85px; display: flex; align-items: end; padding: 14px; border-bottom: 2px solid var(--orange); background: #fff; color: #473b32; font-size: 14px; font-weight: 700; transition: background .2s ease; }
    .article-link:hover { background: #fff0e5; }
    .knowledge-line { margin-top: 22px; padding-top: 17px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
    .knowledge-line a { color: var(--orange-dark); }
    .footer { padding: 34px 0 22px; color: #403831; background: #f2e8df; border-top: 1px solid #e5d6ca; }
    .footer-top { display: flex; justify-content: space-between; align-items: start; gap: 28px; }
    .footer p { margin: 6px 0 0; color: #64594f; font-size: 13px; }
    .friend-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 16px; max-width: 600px; }
    .friend-links a { color: #51453c; font-size: 12px; }
    .friend-links a:hover { color: var(--orange-dark); }
    .copyright { margin-top: 21px; padding-top: 14px; border-top: 1px solid #ddd0c5; color: #6d6259; font-size: 12px; }
    .floating-contact { position: fixed; right: 18px; bottom: 22px; z-index: 15; display: grid; gap: 8px; }
    .floating-contact a { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid #e8d5c7; border-radius: 50%; background: #fff; color: var(--orange-dark); font-size: 12px; font-weight: 800; box-shadow: 0 5px 18px rgba(54,35,20,.12); transition: transform .2s ease; }
    .floating-contact a:hover { transform: translateY(-3px); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .nav-wrap { gap: 7px; }
      .header-cta { display: none; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .article-links { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .header-inner { min-height: 66px; }
      .menu-toggle { display: grid; place-items: center; }
      .nav-wrap { position: relative; }
      .nav-links { display: none; position: absolute; top: calc(100% + 12px); right: 0; width: min(300px, calc(100vw - 32px)); max-height: 70vh; overflow: auto; padding: 9px; border: 1px solid var(--line); background: #fffaf5; box-shadow: 0 14px 28px rgba(45,32,21,.13); align-items: stretch; }
      .nav-links.open { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-links a { padding: 10px; font-size: 13px; }
      .hero { padding: 57px 0 35px; }
      .hero-stats { grid-template-columns: 1fr 1fr; row-gap: 18px; margin-top: 37px; }
      .stat:nth-child(3) { padding-left: 0; border-left: 0; }
      .section { padding: 58px 0; }
      .section-head { display: block; }
      .section-head > .button { margin-top: 17px; }
      .about-layout, .comparison, .token-layout, .contact-layout { grid-template-columns: 1fr; gap: 24px; }
      .feature-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .steps { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .showcase-grid { grid-template-columns: 1fr; }
      .showcase-stack { grid-template-columns: 1fr 1fr; }
      .reviews { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .footer-top { display: grid; }
      .friend-links { justify-content: flex-start; }
    }
    @media (max-width: 480px) {
      .brand-caption { display: none; }
      h1 { font-size: 39px; }
      .hero-lede { font-size: 16px; }
      .hero-actions .button { width: 100%; }
      .feature-grid, .service-grid, .reviews, .showcase-stack { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr 1fr; gap: 17px; }
      .workflow-band { padding: 22px 18px; }
      .article-links { grid-template-columns: 1fr 1fr; }
      form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      form button { grid-column: auto; width: 100%; }
      .floating-contact { right: 10px; bottom: 12px; }
      .floating-contact a { width: 43px; height: 43px; }
    }