:root {
      color-scheme: light;
      --ink: #211b35;
      --muted: #655f74;
      --paper: #faf9ff;
      --white: #fff;
      --line: #e8e3f0;
      --purple: #6b35d5;
      --purple-dark: #48219c;
      --pink: #e650a4;
      --lime: #d8f16b;
      --teal: #147d77;
      --container: 1160px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    section { scroll-margin-top: 90px; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .section { padding: 82px 0; }
    .section-head { max-width: 700px; margin-bottom: 34px; }
    .eyebrow {
      color: var(--purple);
      font-size: .76rem;
      font-weight: 800;
      letter-spacing: 0;
      text-transform: uppercase;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 { font-size: clamp(2.4rem, 5vw, 4.8rem); line-height: 1.08; margin: 14px 0 18px; }
    h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); line-height: 1.2; margin: 9px 0 14px; }
    h3 { line-height: 1.3; margin-bottom: 10px; }
    .section-head p, .muted { color: var(--muted); }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(250,249,255,.94);
      border-bottom: 1px solid rgba(72,33,156,.1);
      backdrop-filter: blur(14px);
    }
    .nav {
      min-height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; font-weight: 800; }
    .brand img { width: 42px; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { color: #4e475f; padding: 10px 13px; font-size: .91rem; }
    .nav-links a:hover { color: var(--purple); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 0 20px;
      border: 0;
      border-radius: 5px;
      background: var(--purple);
      color: #fff;
      font-weight: 750;
      cursor: pointer;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); background: var(--purple-dark); box-shadow: 0 9px 24px #48219c2b; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 5px; padding: 8px 12px; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 78px 0 55px;
      background: linear-gradient(125deg, #f2edff 0%, #fff8fc 53%, #f0fbf7 100%);
      border-bottom: 1px solid #e9e1f3;
    }
    .hero::before, .hero::after {
      content: "";
      position: absolute;
      pointer-events: none;
      border: 1px solid #6b35d522;
      transform: rotate(-24deg);
    }
    .hero::before { width: 380px; height: 380px; right: -110px; top: -170px; border-radius: 38% 62% 45% 55%; }
    .hero::after { width: 210px; height: 210px; right: 95px; bottom: -150px; border-radius: 50%; }
    .hero-layout { display: grid; grid-template-columns: minmax(0,1fr) minmax(280px,.66fr); align-items: center; gap: 44px; position: relative; z-index: 1; }
    .hero-copy { max-width: 720px; }
    .hero-copy > p { max-width: 640px; color: #544d65; font-size: 1.08rem; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 20px; }
    .button.secondary { background: #fff; border: 1px solid #d9d0e9; color: var(--purple-dark); }
    .button.secondary:hover { background: #f6f0ff; }
    .trust-note { color: #655f74; font-size: .9rem; }
    .hero-panel {
      padding: 25px;
      background: #fff;
      border: 1px solid #e9e0f3;
      border-radius: 8px;
      box-shadow: 0 20px 55px #44217c12;
      animation: rise-in .7s ease both;
    }
    .hero-panel h2 { font-size: 1.08rem; margin-bottom: 18px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 6px 10px; border: 1px solid #ece5f4; border-radius: 4px; color: #514767; font-size: .82rem; background: #fdfcff; }
    .hero-strip { margin-top: 30px; display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid #e4dced; padding-top: 22px; gap: 20px; }
    .hero-strip strong { display: block; color: var(--purple-dark); font-size: 1rem; }
    .hero-strip span { color: var(--muted); font-size: .84rem; }
    .band { background: #fff; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .intro-copy { color: var(--muted); max-width: 650px; }
    .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 15px 24px; }
    .feature-list div { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .feature-list strong { display: block; margin-bottom: 4px; }
    .feature-list span { color: var(--muted); font-size: .92rem; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service-item { padding: 22px 20px; background: #fff; border: 1px solid var(--line); border-radius: 5px; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #c5afea; box-shadow: 0 12px 28px #2d16400e; }
    .service-item .index { color: var(--pink); font-size: .78rem; font-weight: 800; }
    .service-item p { color: var(--muted); font-size: .91rem; margin-bottom: 0; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: step; }
    .workflow article { padding: 20px 22px 18px 0; border-top: 2px solid #d9c9f0; position: relative; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); color: var(--purple); font-weight: 800; font-size: .83rem; }
    .workflow article h3 { margin: 10px 0 7px; font-size: 1.05rem; }
    .workflow article p { color: var(--muted); font-size: .9rem; margin-bottom: 0; max-width: 230px; }
    .solution-band { background: #f0ebfb; }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; }
    .solution-grid p { color: var(--muted); }
    .solution-tags { display: flex; flex-wrap: wrap; gap: 9px; }
    .solution-tags span { padding: 8px 12px; background: #fff; border: 1px solid #ddd1ef; border-radius: 4px; color: #44365d; font-size: .88rem; }
    .media-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 16px; align-items: start; }
    .media-stack { display: grid; gap: 16px; }
    .media-frame { overflow: hidden; border-radius: 6px; background: #f1edf6; border: 1px solid var(--line); }
    .media-frame img { display: block; width: 100%; height: auto; }
    .media-caption { padding: 14px 16px; background: #fff; }
    .media-caption strong { display: block; }
    .media-caption span { color: var(--muted); font-size: .88rem; }
    .score-panel { display: flex; align-items: center; gap: 24px; margin-bottom: 24px; padding: 22px 25px; background: #f3edff; border-left: 4px solid var(--purple); }
    .score-number { color: var(--purple-dark); font-size: 2.6rem; font-weight: 850; line-height: 1; }
    .stars { color: #b64c96; letter-spacing: 0; font-size: 1.2rem; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 650px; }
    th, td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; }
    th { background: #f4f0fb; font-size: .91rem; }
    td { color: #514b60; font-size: .91rem; }
    tr:last-child td { border-bottom: 0; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .reviews { display: grid; grid-template-columns: repeat(3,1fr); gap: 13px; }
    .review { padding: 20px; border-top: 2px solid #d8c5f2; background: #fff; }
    .review p { color: #514b60; font-size: .92rem; }
    .review strong { display: block; font-size: .9rem; }
    .review span { color: var(--muted); font-size: .82rem; }
    .accordion { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { display: flex; justify-content: space-between; align-items: center; gap: 18px; list-style: none; padding: 18px 2px; cursor: pointer; font-weight: 700; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; color: var(--purple); font-size: 1.35rem; line-height: 1; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { color: var(--muted); padding: 0 28px 18px 2px; margin: 0; }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
    .contact-details { display: grid; gap: 13px; margin-top: 22px; }
    .contact-details div { padding-bottom: 12px; border-bottom: 1px solid var(--line); }
    .contact-details strong { display: block; }
    .contact-details span { color: var(--muted); }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: .87rem; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 12px; background: #fff; border: 1px solid #dcd6e5; border-radius: 4px; color: var(--ink); }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid #a98cde; border-color: transparent; }
    .field textarea { min-height: 120px; resize: vertical; }
    .contact-form .button { justify-self: start; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .article-list a { padding: 17px 14px; border-right: 1px solid var(--line); color: #433b55; font-size: .9rem; }
    .article-list a:last-child { border-right: 0; }
    .article-list a:hover { color: var(--purple); background: #f5f0fc; }
    .footer { padding: 32px 0 26px; background: #f0edf6; border-top: 1px solid #e5deed; color: #302a3d; }
    .footer-main { display: flex; justify-content: space-between; gap: 28px; align-items: start; }
    .footer p { color: #625b70; margin: 10px 0 0; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; max-width: 600px; }
    .footer-links a { color: #453b57; font-size: .88rem; }
    .footer-links a:hover { color: var(--purple); }
    .copyright { margin-top: 22px; padding-top: 15px; border-top: 1px solid #ded8e6; color: #696275; font-size: .82rem; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-contact a { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; background: var(--purple); color: #fff; box-shadow: 0 5px 18px #32116b35; font-size: .76rem; font-weight: 800; }
    .float-contact a:last-child { background: var(--teal); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes rise-in { from { opacity: 0; transform: translateY(12px); } to { 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: 900px) {
      .menu-toggle { display: inline-flex; align-items: center; gap: 8px; }
      .nav { position: relative; }
      .nav-links { display: none; position: absolute; top: calc(100% - 1px); left: 0; right: 0; padding: 10px; background: #fff; border: 1px solid var(--line); box-shadow: 0 12px 24px #211b3514; flex-direction: column; align-items: stretch; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 10px 12px; }
      .nav-cta { display: none; }
      .hero-layout { grid-template-columns: 1fr; gap: 26px; }
      .hero-panel { max-width: 560px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .reviews { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
      .article-list a:nth-child(3) { border-right: 0; }
      .article-list a:nth-child(n+4) { border-top: 1px solid var(--line); }
    }
    @media (max-width: 600px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .section { padding: 60px 0; }
      .hero { padding: 58px 0 38px; }
      .hero-strip { grid-template-columns: 1fr; gap: 12px; }
      .intro-grid, .solution-grid, .contact-layout, .media-grid { grid-template-columns: 1fr; gap: 28px; }
      .feature-list { grid-template-columns: 1fr; gap: 4px; }
      .service-grid, .reviews { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 16px; }
      .workflow article { padding-right: 10px; }
      .score-panel { align-items: flex-start; flex-direction: column; gap: 9px; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .article-list a { border-top: 1px solid var(--line); }
      .article-list a:nth-child(odd) { border-right: 1px solid var(--line); }
      .article-list a:nth-child(even) { border-right: 0; }
      .article-list a:first-child, .article-list a:nth-child(2) { border-top: 0; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .footer-main { flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
    }