:root {
      color-scheme: light;
      --ink: #25212a;
      --muted: #625b66;
      --pink: #c92f72;
      --pink-dark: #8f1c52;
      --pink-soft: #fff0f6;
      --rose: #f6dce8;
      --line: #eadde4;
      --paper: #fffafc;
      --white: #fff;
      --green: #176b52;
      --shadow: 0 14px 34px rgba(92, 35, 63, .09);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 92px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    img { max-width: 100%; height: auto; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255,250,252,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { width: 38px; height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 7px 9px; text-decoration: none; color: #4e4650; font-size: 13px; border-radius: 5px; }
    .nav-links a:hover { color: var(--pink-dark); background: var(--pink-soft); }
    .nav-links .nav-cta { margin-left: 7px; color: #fff; background: var(--pink); padding: 9px 14px; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); border-radius: 5px; padding: 8px 11px; color: var(--ink); cursor: pointer; }
    .hero {
      position: relative; overflow: hidden; isolation: isolate;
      background: linear-gradient(115deg, #fff0f6 0%, #fff9fb 54%, #fce8f0 100%);
      border-bottom: 1px solid var(--rose);
    }
    .hero::before, .hero::after { position: absolute; content: ""; z-index: -1; pointer-events: none; }
    .hero::before { width: 350px; aspect-ratio: 1; border: 1px solid rgba(201,47,114,.17); border-radius: 50%; right: -80px; top: 12px; box-shadow: 0 0 0 34px rgba(201,47,114,.035), 0 0 0 72px rgba(201,47,114,.025); }
    .hero::after { width: 140px; aspect-ratio: 1; right: 95px; top: 120px; border: 1px solid rgba(143,28,82,.15); transform: rotate(45deg); }
    .hero-inner { padding: 74px 0 54px; max-width: 850px; }
    .eyebrow { margin: 0 0 14px; color: var(--pink-dark); font-weight: 700; font-size: 13px; letter-spacing: 1px; }
    h1 { max-width: 700px; margin: 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 680px; margin: 20px 0 25px; color: #514753; font-size: 17px; }
    .actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 19px; border: 1px solid var(--pink); border-radius: 5px; background: var(--pink); color: #fff; text-decoration: none; font-weight: 700; transition: transform .2s, box-shadow .2s, background .2s; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(143,28,82,.19); background: var(--pink-dark); }
    .button.secondary { color: var(--pink-dark); background: #fff; }
    .button.secondary:hover { background: var(--pink-soft); }
    .hero-note { margin: 18px 0 0; color: var(--muted); font-size: 13px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); background: #fff; }
    .metric { padding: 22px 20px; text-align: center; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--pink-dark); font-size: 21px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .section { padding: 68px 0; border-bottom: 1px solid var(--line); }
    .section.soft { background: #fff4f8; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
    .section-heading h2 { margin: 0; font-size: 30px; line-height: 1.25; }
    .section-heading p { max-width: 520px; margin: 0; color: var(--muted); }
    .kicker { display: block; margin-bottom: 8px; color: var(--pink); font-size: 12px; font-weight: 800; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 38px; align-items: start; }
    .intro-grid p { margin: 0 0 14px; color: #514a55; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 22px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .capability-list strong { display: block; margin-bottom: 3px; }
    .capability-list span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
    .service-item { padding: 18px; border: 1px solid var(--line); border-top: 3px solid #d85288; background: #fff; transition: transform .2s, box-shadow .2s; }
    .service-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
    .service-item h3 { margin: 0 0 7px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 6px 22px 8px 0; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 12px; color: var(--pink); font-size: 24px; font-weight: 800; }
    .workflow article:not(:last-child)::after { position: absolute; content: ""; height: 1px; width: 35%; top: 23px; right: 18px; background: #e5a6c1; }
    .workflow h3 { margin: 0 0 7px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .plain-list { margin: 0; padding-left: 20px; color: #514a55; }
    .plain-list li { padding: 6px 0; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 680px; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #fff0f6; color: #4d2336; font-size: 13px; }
    td { color: #514a55; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; align-items: center; gap: 20px; margin-bottom: 20px; padding: 20px 23px; background: #fff; border-left: 4px solid var(--pink); }
    .rating strong { color: var(--pink-dark); font-size: 32px; line-height: 1; }
    .stars { color: #bf4b7b; font-size: 20px; letter-spacing: 2px; }
    .rating p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 18px; background: #fff; border: 1px solid var(--line); }
    .review p { margin: 0 0 15px; color: #514a55; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .showcase figure { margin: 0; padding: 9px; background: #fff; border: 1px solid var(--line); }
    .showcase img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: #fff8fb; }
    .showcase figcaption { padding: 10px 4px 2px; color: #514a55; font-size: 13px; }
    .square-image { max-width: 330px; }
    .square-image img { aspect-ratio: 1; }
    .tags { display: flex; flex-wrap: wrap; gap: 8px; }
    .tags span { padding: 6px 10px; border: 1px solid #e8bfd0; background: #fff; color: #5d2b42; font-size: 13px; }
    .article-links, .friend-links { display: grid; grid-template-columns: repeat(5, 1fr); gap: 9px; }
    .article-links a, .friend-links a { display: block; padding: 11px 12px; border: 1px solid var(--line); background: #fff; color: var(--pink-dark); text-decoration: none; font-size: 13px; }
    .article-links a:hover, .friend-links a:hover { border-color: var(--pink); }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
    .faq-list details { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .faq-list summary { cursor: pointer; font-weight: 700; }
    .faq-list details p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 40px; align-items: start; }
    .contact-info p { margin: 0 0 11px; color: #514a55; }
    .contact-info a { color: var(--pink-dark); }
    .contact-qr { width: 150px; margin-top: 12px; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { 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 #d9cbd2; border-radius: 4px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 118px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid #e9a4c0; outline-offset: 1px; }
    .form-note { color: var(--muted); font-size: 12px; }
    .footer { padding: 26px 0; background: #fff; color: #38313a; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .footer p { margin: 0; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 0 14px; }
    .footer-links a { color: #554b57; font-size: 13px; }
    .floating-help { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: flex; align-items: center; gap: 8px; padding: 10px 14px; border: 0; border-radius: 5px; background: var(--pink-dark); color: #fff; text-decoration: none; box-shadow: 0 8px 20px rgba(60,18,38,.2); }
    .floating-help:hover { background: var(--pink); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-row { flex-wrap: wrap; padding: 12px 0; }
      .menu-toggle { display: inline-flex; }
      .nav-links { display: none; width: 100%; justify-content: flex-start; padding: 5px 0 2px; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .article-links, .friend-links { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(100% - 30px, 1160px); }
      .hero-inner { padding: 54px 0 40px; }
      .hero-copy { font-size: 15px; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .section { padding: 48px 0; }
      .section-heading { display: block; }
      .section-heading h2 { font-size: 25px; margin-bottom: 10px; }
      .intro-grid, .two-col, .contact-grid { grid-template-columns: 1fr; gap: 22px; }
      .capability-list, .service-grid { grid-template-columns: repeat(2, 1fr); }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 20px 10px; }
      .workflow article:not(:last-child)::after { display: none; }
      .review-grid { grid-template-columns: 1fr; }
      .showcase { grid-template-columns: 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .article-links, .friend-links { grid-template-columns: repeat(2, 1fr); }
      .footer-row { align-items: flex-start; flex-direction: column; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }