:root {
      color-scheme: light;
      --ink: #211d2b;
      --muted: #676272;
      --paper: #f8f7fb;
      --white: #fff;
      --purple: #7138c8;
      --purple-dark: #5123a0;
      --pink: #d84c9a;
      --line: #e8e3ef;
      --green: #27785d;
      --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: "PingFang SC", "Microsoft YaHei", system-ui, 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; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(255,255,255,.94);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(14px);
    }
    .header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
    .brand img { display: block; width: 150px; max-width: 100%; height: auto; }
    .nav { display: flex; align-items: center; gap: 20px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 9px 11px; color: #514b5c; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--purple); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 17px;
      border: 1px solid transparent;
      border-radius: 6px;
      color: #fff;
      background: var(--purple);
      font-weight: 700;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta:hover, .button:hover { background: var(--purple-dark); box-shadow: 0 8px 22px rgba(81,35,160,.2); transform: translateY(-2px); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink); cursor: pointer; }
    .menu-toggle span, .menu-toggle::before, .menu-toggle::after { display: block; width: 18px; height: 2px; margin: 4px auto; background: currentColor; content: ""; }
    .hero {
      position: relative;
      overflow: hidden;
      color: #241d31;
      background: linear-gradient(120deg, #f2eaff 0%, #fff7fc 54%, #f5efff 100%);
      border-bottom: 1px solid #e9ddf6;
    }
    .hero::before {
      position: absolute;
      right: -110px;
      top: -185px;
      width: 440px;
      aspect-ratio: 1;
      border: 1px solid rgba(113,56,200,.18);
      border-radius: 50%;
      box-shadow: 0 0 0 42px rgba(113,56,200,.035), 0 0 0 90px rgba(216,76,154,.025);
      content: "";
      animation: orbit 18s linear infinite;
    }
    .hero-inner { position: relative; padding-block: 72px 46px; }
    .hero-copy { max-width: 800px; }
    .eyebrow { margin: 0 0 15px; color: var(--purple-dark); font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    h1 { max-width: 760px; margin: 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy > p { max-width: 650px; margin: 19px 0 25px; color: #5e5668; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 11px; }
    .button.secondary { color: var(--purple-dark); background: #fff; border-color: #d9c9ed; }
    .button.secondary:hover { color: #fff; }
    .hero-note { margin-top: 16px; color: #686071; font-size: 13px; }
    .hero-note strong { color: var(--green); }
    .hero-stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; max-width: 930px; margin-top: 48px; border-top: 1px solid #ded3ea; }
    .stat { padding: 19px 20px 5px 0; }
    .stat + .stat { padding-left: 22px; border-left: 1px solid #ded3ea; }
    .stat strong { display: block; color: var(--purple-dark); font-size: 22px; line-height: 1.3; }
    .stat span { color: #686071; font-size: 13px; }
    .section { padding-block: 64px; }
    .section.white { background: #fff; }
    .section.tint { background: #f1edf7; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 22px; margin-bottom: 27px; }
    .section-head > div { max-width: 690px; }
    .kicker { margin: 0 0 7px; color: var(--purple); font-size: 12px; font-weight: 800; }
    h2 { margin: 0; font-size: clamp(26px, 3.6vw, 36px); line-height: 1.25; letter-spacing: 0; }
    .section-head p { margin: 10px 0 0; color: var(--muted); }
    .text-link { color: var(--purple-dark); font-size: 14px; font-weight: 700; white-space: nowrap; }
    .intro-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 42px; align-items: start; }
    .intro-copy p { margin: 0 0 14px; color: #514b5a; }
    .intro-points { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 25px; margin: 6px 0 0; padding: 0; list-style: none; }
    .intro-points li { padding: 10px 0; border-bottom: 1px solid var(--line); color: #37313e; font-size: 14px; }
    .intro-points li::before { margin-right: 9px; color: var(--pink); content: "◆"; font-size: 10px; }
    .model-strip { padding: 20px; border-left: 3px solid var(--pink); background: #f8f5fb; }
    .model-strip h3 { margin: 0 0 9px; font-size: 17px; }
    .model-strip p { margin: 0; color: var(--muted); font-size: 13px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
    .tag { padding: 5px 9px; border: 1px solid #e3d9ed; border-radius: 4px; color: #4f435f; background: #fff; font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 0 25px; }
    .service-item { padding: 20px 0 21px; border-top: 1px solid var(--line); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .mini-tag { display: inline-block; margin-bottom: 8px; color: var(--purple); font-size: 11px; font-weight: 800; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 22px; counter-reset: steps; }
    .step { position: relative; padding: 18px 0 0; border-top: 2px solid #c8b5df; counter-increment: steps; }
    .step::before { display: block; margin-bottom: 11px; color: var(--purple); font-size: 13px; font-weight: 800; content: "0" counter(steps); }
    .step h3 { margin: 0 0 6px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .compare { width: 100%; min-width: 690px; border-collapse: collapse; text-align: left; }
    .compare th, .compare td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    .compare th { color: #41394c; background: #f6f2fa; font-size: 13px; }
    .compare td { color: #5e5866; font-size: 14px; }
    .compare td:first-child { width: 23%; color: var(--ink); font-weight: 700; }
    .score { display: flex; align-items: center; gap: 17px; margin-bottom: 20px; }
    .score strong { color: var(--purple-dark); font-size: 36px; line-height: 1; }
    .stars { color: #bd6c14; letter-spacing: 2px; }
    .score span { color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
    .case { overflow: hidden; border: 1px solid var(--line); background: #fff; transition: transform .22s ease, box-shadow .22s ease; }
    .case:hover, .review:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(41,25,65,.08); }
    .case img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; background: #eee8f4; }
    .case-body { padding: 15px 16px 17px; }
    .case-body h3 { margin: 0 0 5px; font-size: 16px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
    .review { padding: 18px; border: 1px solid var(--line); background: #fff; transition: transform .22s ease, box-shadow .22s ease; }
    .review blockquote { margin: 0; color: #514a59; font-size: 14px; }
    .review p { margin: 14px 0 0; color: var(--purple-dark); font-size: 13px; font-weight: 700; }
    .article-list { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 18px; }
    .article { padding: 13px 0; border-top: 2px solid #d8c8e8; }
    .article span { color: var(--purple); font-size: 11px; font-weight: 800; }
    .article a { display: block; margin-top: 5px; font-size: 14px; font-weight: 700; }
    .article a:hover { color: var(--purple); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 16px 36px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { position: absolute; right: 4px; top: 15px; color: var(--purple); content: "+"; font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 850px; margin: -3px 0 17px; color: var(--muted); font-size: 14px; }
    .form-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; align-items: start; }
    .contact-copy p { color: var(--muted); }
    .contact-list { margin: 20px 0 0; padding: 0; list-style: none; }
    .contact-list li { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .contact-list strong { display: inline-block; min-width: 92px; }
    .request-form { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #453e4e; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #dcd5e5; border-radius: 4px; outline: none; color: var(--ink); background: #fff; }
    .field textarea { min-height: 108px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--purple); box-shadow: 0 0 0 3px rgba(113,56,200,.1); }
    .request-form .button { justify-self: start; cursor: pointer; }
    .site-footer { padding: 30px 0 25px; color: #463f4f; background: #efebf3; border-top: 1px solid #e2dbe9; }
    .footer-top { display: flex; align-items: start; justify-content: space-between; gap: 28px; }
    .footer-brand { font-weight: 800; }
    .footer-top p { max-width: 520px; margin: 6px 0 0; color: #645d6b; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; max-width: 520px; }
    .footer-links a { color: #51465f; font-size: 13px; }
    .footer-links a:hover { color: var(--purple); }
    .copyright { margin-top: 19px; padding-top: 14px; border-top: 1px solid #ded7e5; color: #716a77; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 16px; bottom: 20px; display: grid; gap: 8px; }
    .float-contact a { display: inline-flex; justify-content: center; align-items: center; min-height: 42px; padding: 0 13px; border: 1px solid #e1d4ef; color: var(--purple-dark); background: #fff; box-shadow: 0 5px 18px rgba(46,31,65,.1); font-size: 13px; font-weight: 700; }
    .float-contact a:hover { color: #fff; background: var(--purple); }
    .to-top { display: none !important; }
    .to-top.visible { display: inline-flex !important; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @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: 960px) {
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav { gap: 10px; }
      .nav-cta { padding-inline: 12px; font-size: 13px; }
      .article-list { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-inner { min-height: 64px; }
      .brand img { width: 132px; }
      .menu-toggle { display: block; }
      .nav { position: relative; gap: 8px; }
      .nav-links { position: absolute; top: calc(100% + 12px); right: 0; display: none; width: min(300px, calc(100vw - 32px)); align-items: stretch; padding: 8px; border: 1px solid var(--line); background: #fff; box-shadow: 0 12px 28px rgba(30,20,45,.12); }
      .nav-links.open { display: flex; flex-direction: column; }
      .nav-links a { padding: 10px; font-size: 14px; }
      .nav-cta { min-height: 40px; }
      .hero-inner { padding-top: 58px; }
      .hero-stats { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .stat:nth-child(3) { padding-left: 0; border-left: 0; }
      .stat:nth-child(n+3) { border-top: 1px solid #ded3ea; }
      .intro-grid, .form-layout { grid-template-columns: 1fr; gap: 25px; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 18px; }
      .workflow { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .case-grid, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .section { padding-block: 52px; }
      .footer-top { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 480px) {
      .hero-inner { padding-block: 48px 34px; }
      h1 { font-size: 39px; }
      .hero-copy > p { font-size: 15px; }
      .hero-actions .button { flex: 1 1 145px; }
      .hero-stats { margin-top: 35px; }
      .stat { padding-right: 10px; }
      .stat + .stat { padding-left: 13px; }
      .stat strong { font-size: 19px; }
      .section-head { align-items: start; flex-direction: column; gap: 10px; }
      .intro-points, .service-grid, .workflow, .case-grid, .review-grid, .article-list { grid-template-columns: 1fr; }
      .case img { aspect-ratio: 16 / 9; }
      .request-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .float-contact { right: 10px; bottom: 12px; }
      .float-contact a { min-height: 38px; padding-inline: 10px; font-size: 12px; }
    }