:root {
      --ink: #282321;
      --muted: #716663;
      --paper: #fffaf7;
      --white: #fff;
      --line: #eadbd5;
      --red: #c82f30;
      --red-dark: #9f2025;
      --rose: #f8e6df;
      --orange: #ef8a51;
      --green: #345e50;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      inset-block-start: 0;
      z-index: 20;
      background: rgba(255,250,247,.96);
      border-bottom: 1px solid rgba(234,219,213,.85);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { display: block; width: 40px; height: 40px; object-fit: contain; }
    .brand-name { font-size: 17px; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 10px 11px; color: #514541; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--red); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 0 18px;
      border: 1px solid var(--red);
      border-radius: 4px;
      color: #fff;
      background: var(--red);
      font-weight: 700;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta { flex: 0 0 auto; min-height: 40px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--red-dark); box-shadow: 0 8px 20px rgba(159,32,37,.18); }
    .button.secondary { background: transparent; color: var(--red-dark); }
    .button.secondary:hover { color: white; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: white; color: var(--ink); border-radius: 4px; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 75px 0 52px;
      background: linear-gradient(115deg, #fff6f0 0%, #fffaf7 56%, #f8e5dc 100%);
      border-bottom: 1px solid var(--line);
    }
    .hero::before {
      content: "";
      position: absolute;
      width: 410px;
      height: 410px;
      right: -130px;
      top: -175px;
      border: 1px solid rgba(200,47,48,.17);
      border-radius: 50%;
      box-shadow: 0 0 0 42px rgba(200,47,48,.035), 0 0 0 84px rgba(200,47,48,.025);
      pointer-events: none;
    }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(280px,.8fr); align-items: center; gap: 54px; }
    .eyebrow { color: var(--red-dark); font-weight: 800; font-size: 13px; letter-spacing: 1.4px; }
    h1 { max-width: 680px; margin: 15px 0 18px; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin: 0; color: #635652; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 15px; color: var(--muted); font-size: 13px; }
    .hero-mark { min-height: 280px; display: grid; place-items: center; position: relative; }
    .mark-frame { width: min(100%, 350px); aspect-ratio: 1; display: grid; place-items: center; position: relative; border: 1px solid rgba(200,47,48,.32); border-radius: 50%; }
    .mark-frame::before, .mark-frame::after { content: ""; position: absolute; inset: 16%; border: 1px dashed rgba(200,47,48,.32); border-radius: 50%; animation: rotate 34s linear infinite; }
    .mark-frame::after { inset: 31%; border-style: solid; animation-direction: reverse; animation-duration: 27s; }
    .mark-center { position: relative; z-index: 1; width: 42%; aspect-ratio: 1; display: grid; place-items: center; border-radius: 50%; background: var(--red); color: white; text-align: center; box-shadow: 0 16px 40px rgba(159,32,37,.22); }
    .mark-center strong { display: block; font-size: 22px; line-height: 1.2; }
    .mark-center span { display: block; margin-top: 5px; font-size: 11px; }
    .orbit-label { position: absolute; z-index: 2; padding: 7px 10px; border: 1px solid var(--line); border-radius: 3px; background: white; color: #443732; font-size: 12px; box-shadow: 0 5px 18px rgba(62,31,24,.07); }
    .orbit-label.one { top: 10%; left: 12%; }
    .orbit-label.two { top: 18%; right: 4%; }
    .orbit-label.three { bottom: 15%; left: 3%; }
    .orbit-label.four { bottom: 8%; right: 14%; }
    @keyframes rotate { to { transform: rotate(360deg); } }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; margin-top: 48px; border-top: 1px solid var(--line); }
    .metric { padding: 18px 18px 0 0; }
    .metric strong { display: block; color: var(--red-dark); font-size: 21px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding: 76px 0; }
    .section.alt { background: #fff2ec; border-block: 1px solid #f0dcd3; }
    .section-head { max-width: 720px; margin: 0 0 34px; }
    .section-kicker { margin: 0 0 8px; color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: 1.2px; }
    h2 { margin: 0 0 12px; font-size: clamp(27px, 3.4vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-head p, .lead { margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; align-items: start; gap: 54px; }
    .intro-copy p { margin: 0 0 15px; color: #5f534e; }
    .check-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px 18px; }
    .check-list li { display: flex; gap: 9px; align-items: flex-start; color: #433832; font-size: 14px; }
    .check-list li::before { content: "✓"; flex: 0 0 auto; color: var(--red); font-weight: 900; }
    .service-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
    .service-item { padding: 20px; background: var(--white); border: 1px solid var(--line); transition: transform .22s ease, box-shadow .22s ease; }
    .service-item:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(79,41,29,.08); }
    .service-index { color: var(--red); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 8px 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
    .service-tags span { padding: 6px 10px; border: 1px solid #e8c9bd; color: #673e32; background: #fffaf7; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; border-top: 1px solid #d9b8aa; }
    .step { position: relative; padding: 24px 18px 0 0; }
    .step::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--red); box-shadow: 0 0 0 5px #fff2ec; }
    .step small { color: var(--red-dark); font-weight: 800; }
    .step h3 { margin: 8px 0 6px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-row { display: grid; grid-template-columns: .85fr 1.15fr; gap: 42px; align-items: center; }
    .solution-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
    .solution-list span { padding: 12px 14px; border-left: 3px solid var(--orange); background: #fff; color: #473a35; font-size: 14px; }
    .media-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 16px; }
    .media-item { overflow: hidden; background: white; border: 1px solid var(--line); }
    .media-item img { width: 100%; display: block; aspect-ratio: 16 / 9; object-fit: cover; }
    .media-caption { padding: 14px 16px; }
    .media-caption strong { display: block; }
    .media-caption span { color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
    .review { padding: 19px; background: white; border-top: 3px solid var(--red); box-shadow: 0 5px 20px rgba(79,41,29,.045); }
    .review blockquote { margin: 0; color: #4f433e; font-size: 14px; }
    .review cite { display: block; margin-top: 14px; color: var(--muted); font-size: 12px; font-style: normal; }
    .rating-panel { display: grid; grid-template-columns: .7fr 1.3fr; gap: 34px; align-items: center; margin-bottom: 26px; padding: 24px; color: white; background: var(--red-dark); }
    .rating-score { border-right: 1px solid rgba(255,255,255,.28); }
    .rating-score strong { display: block; font-size: 48px; line-height: 1; }
    .rating-score span { display: block; margin-top: 9px; color: #ffe0d4; font-size: 13px; }
    .stars { color: #ffd49c; font-size: 23px; letter-spacing: 2px; }
    .rating-panel p { margin: 8px 0 0; color: #fff1e9; font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #eee2dd; vertical-align: top; }
    th { background: #f9ece6; color: #4b332e; font-size: 13px; }
    td { color: #625651; font-size: 13px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .comparison-note { margin: 12px 0 0; color: var(--muted); font-size: 12px; }
    .article-list { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 12px; }
    .article-link { display: flex; min-height: 108px; flex-direction: column; justify-content: space-between; padding: 15px; border: 1px solid var(--line); background: white; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { border-color: var(--red); transform: translateY(-3px); }
    .article-link span { color: var(--red); font-size: 11px; font-weight: 700; }
    .article-link strong { font-size: 14px; }
    .article-link small { color: var(--muted); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 3px; top: 12px; color: var(--red); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: -3px 32px 18px 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 42px; align-items: start; }
    .contact-form { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; padding: 22px; background: white; border: 1px solid var(--line); }
    .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%; min-width: 0; padding: 11px 12px; border: 1px solid #ddcec8; border-radius: 2px; background: #fffdfa; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .contact-info p { color: var(--muted); }
    .contact-details { display: grid; gap: 10px; margin-top: 22px; }
    .contact-details a, .contact-details span { color: #483a34; font-size: 14px; }
    .qr-wrap { display: flex; align-items: center; gap: 18px; margin-top: 22px; }
    .qr-wrap img { width: 118px; border: 1px solid var(--line); }
    .qr-wrap span { color: var(--muted); font-size: 13px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px; background: #f8e6df; border-left: 4px solid var(--red); }
    .join-band h3 { margin: 0 0 5px; }
    .join-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .site-footer { padding: 28px 0; color: #4f433e; background: #f1e6e0; border-top: 1px solid #e2d2ca; }
    .footer-main { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
    .footer-main p { margin: 8px 0 0; color: #655650; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 16px; max-width: 600px; }
    .footer-links a { color: #563b33; font-size: 12px; text-decoration: underline; text-decoration-color: #cbb6ab; text-underline-offset: 3px; }
    .copyright { margin-top: 20px; padding-top: 14px; border-top: 1px solid #dfcec5; color: #71615a; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .float-contact a { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; color: white; background: var(--red); box-shadow: 0 5px 17px rgba(88,32,25,.2); font-size: 12px; font-weight: 800; }
    .float-contact a:last-child { color: var(--red-dark); background: white; border: 1px solid var(--line); }
    .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: 980px) {
      .nav-row { gap: 12px; }
      .nav-links { gap: 0; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-cta { padding-inline: 12px; }
      .hero-inner { gap: 25px; }
      .article-list { grid-template-columns: repeat(3,minmax(0,1fr)); }
    }
    @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; margin-left: auto; }
      .nav-cta { min-height: 38px; padding-inline: 11px; font-size: 12px; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 8px 16px 14px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 10px 18px rgba(60,36,28,.08); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
      .nav-links a { padding: 10px; font-size: 14px; }
      .hero { padding: 55px 0 34px; }
      .hero-inner { grid-template-columns: 1fr; }
      h1 { font-size: 42px; }
      .hero-mark { min-height: 250px; }
      .mark-frame { width: 250px; }
      .metrics { grid-template-columns: repeat(2,1fr); row-gap: 14px; margin-top: 28px; }
      .section { padding: 56px 0; }
      .intro-grid, .solution-row, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .service-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .workflow { grid-template-columns: repeat(2,1fr); row-gap: 20px; }
      .review-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .rating-panel { grid-template-columns: 1fr; gap: 16px; }
      .rating-score { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.28); padding-bottom: 16px; }
      .media-grid { grid-template-columns: 1fr; }
      .footer-main { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 500px) {
      .brand-name { font-size: 15px; }
      .ai-page-logo { width: 34px; height: 34px; }
      .nav-cta { display: none; }
      h1 { font-size: 37px; }
      .hero-copy { font-size: 15px; }
      .hero-actions .button { flex: 1 1 100%; }
      .service-grid, .review-grid, .check-list, .solution-list, .article-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 16px; }
      .field.wide { grid-column: auto; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
    }