:root {
      color-scheme: light;
      --ink: #20233a;
      --muted: #666b80;
      --line: #e7e8f0;
      --paper: #ffffff;
      --wash: #f7f7fb;
      --purple: #7254e8;
      --blue: #4085f5;
      --pink: #f06aa8;
      --orange: #f59b52;
      --teal: #38bda8;
      --container: 1160px;
      --shadow: 0 16px 44px rgba(44, 42, 88, .09);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    body {
      margin: 0;
      color: var(--ink);
      background: linear-gradient(180deg, #fbfaff 0%, #fff 34%, #f8f9fd 100%);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    .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 rgba(226,226,238,.88);
      backdrop-filter: blur(14px);
    }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 11px; font-weight: 800; letter-spacing: .01em; }
    .ai-page-logo { width: 42px; height: 42px; object-fit: contain; }
    .brand-name { font-size: 18px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 10px 11px; color: #50546a; font-size: 13px; white-space: nowrap; border-radius: 10px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--purple); background: #f2efff; }
    .nav-links .nav-cta { margin-left: 8px; padding: 10px 17px; color: #fff; background: linear-gradient(110deg, #7658ea, #4d83ef 56%, #49b8cf); font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 11px; padding: 8px 12px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; isolation: isolate; padding: 82px 0 60px; }
    .hero::before, .hero::after { position: absolute; z-index: -1; content: ""; border-radius: 50%; filter: blur(1px); pointer-events: none; }
    .hero::before { width: 420px; height: 420px; top: -110px; right: max(-100px, calc((100vw - 1250px) / 2)); background: radial-gradient(circle, rgba(123,95,237,.17), rgba(123,95,237,0) 68%); animation: drift 9s ease-in-out infinite alternate; }
    .hero::after { width: 350px; height: 350px; left: -160px; bottom: -170px; background: radial-gradient(circle, rgba(71,195,183,.15), rgba(71,195,183,0) 70%); }
    .hero-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(270px, .85fr); gap: 50px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 18px; color: #6853ce; font-size: 13px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 26px; height: 2px; background: linear-gradient(90deg, var(--pink), var(--purple), var(--teal)); }
    h1 { max-width: 720px; margin: 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.13; letter-spacing: -.045em; }
    .hero-lead { max-width: 650px; margin: 22px 0 27px; color: #5b6075; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 0 21px; border: 1px solid transparent; border-radius: 13px; cursor: pointer; font-weight: 750; transition: transform .2s, box-shadow .2s, background .2s; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 11px 22px rgba(73,79,155,.16); }
    .button-primary { color: #fff; background: linear-gradient(110deg, #7859e9, #4a81ee 65%, #46b7c8); box-shadow: 0 9px 22px rgba(111,84,224,.22); }
    .button-secondary { color: #494c64; background: #fff; border-color: #dedfec; }
    .hero-note { margin: 16px 0 0; color: #777b8e; font-size: 12px; }
    .hero-panel { position: relative; padding: 25px; border: 1px solid rgba(226,225,241,.95); border-radius: 27px; background: rgba(255,255,255,.78); box-shadow: var(--shadow); }
    .hero-panel::before { position: absolute; inset: -1px; z-index: -1; border-radius: 28px; content: ""; background: linear-gradient(135deg, rgba(240,106,168,.35), rgba(114,84,232,.24), rgba(56,189,168,.28)); transform: rotate(2deg); }
    .panel-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 19px; }
    .panel-top strong { font-size: 15px; }
    .live-label { color: #347c70; background: #e9f8f4; border-radius: 99px; padding: 5px 10px; font-size: 11px; font-weight: 700; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 7px 11px; border: 1px solid #e8e6f3; border-radius: 9px; background: #fff; color: #4d5065; font-size: 12px; }
    .model-cloud span:nth-child(3n+1) { background: #f2efff; border-color: #e9e3ff; }
    .model-cloud span:nth-child(3n+2) { background: #fff2f6; border-color: #fbe2ec; }
    .model-cloud span:nth-child(3n) { background: #ecf8f6; border-color: #dff2ee; }
    .panel-foot { display: flex; justify-content: space-between; gap: 14px; margin-top: 19px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; padding: 0 0 38px; }
    .metric { padding: 17px 20px; border: 1px solid #ececf3; border-radius: 16px; background: rgba(255,255,255,.84); }
    .metric strong { display: block; margin-bottom: 2px; font-size: 17px; }
    .metric span { color: var(--muted); font-size: 12px; }
    section.content-section { padding: 70px 0; }
    .section-heading { max-width: 720px; margin-bottom: 30px; }
    .section-kicker { margin: 0 0 8px; color: #7660dc; font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 39px); line-height: 1.2; letter-spacing: -.025em; }
    .section-intro { margin: 13px 0 0; color: var(--muted); font-size: 15px; }
    .about-band { padding: 27px; border-radius: 22px; background: linear-gradient(115deg, #f0edff, #f3f9ff 55%, #edfaf6); border: 1px solid #e8e8f2; }
    .about-band p { margin: 0; color: #4f5369; }
    .about-band p + p { margin-top: 12px; }
    .capability-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; }
    .capability { position: relative; overflow: hidden; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: #fff; transition: transform .22s, box-shadow .22s; }
    .capability:hover, .case-card:hover, .feedback-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .capability::after { position: absolute; width: 68px; height: 4px; left: 22px; top: 0; content: ""; border-radius: 0 0 5px 5px; background: linear-gradient(90deg, var(--purple), var(--pink), var(--orange)); }
    .capability h3, .case-card h3, .workflow-step h3, .feedback-card h3 { margin: 0 0 8px; font-size: 17px; }
    .capability p, .case-card p { margin: 0; color: var(--muted); font-size: 13px; }
    .capability .tagline { display: inline-block; margin-top: 13px; color: #6956cf; font-size: 11px; font-weight: 700; }
    .scene-list { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 9px; margin-top: 17px; }
    .scene-list span { padding: 10px 12px; border-radius: 11px; background: #fff; border: 1px solid #ebebf2; color: #4e5266; font-size: 12px; }
    .process-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; counter-reset: steps; }
    .workflow-step { position: relative; padding: 21px 19px; border-radius: 17px; border: 1px solid var(--line); background: #fff; counter-increment: steps; }
    .workflow-step::before { display: block; margin-bottom: 16px; color: #8068e1; content: "0" counter(steps); font-size: 13px; font-weight: 800; letter-spacing: .12em; }
    .workflow-step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 22px; align-items: start; }
    .solution-box { padding: 25px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
    .solution-box h3 { margin: 0 0 12px; font-size: 18px; }
    .solution-box ul { margin: 0; padding-left: 19px; color: #5b6074; }
    .solution-box li + li { margin-top: 8px; }
    .service-network { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
    .service-network span { padding: 8px 12px; border: 1px solid #e7e5f4; border-radius: 99px; color: #56536e; background: #fbfaff; font-size: 12px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
    .comparison { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 15px 17px; border-bottom: 1px solid #ededf3; vertical-align: top; font-size: 13px; }
    .comparison thead th { background: #f3f0ff; color: #413b6d; font-weight: 800; }
    .comparison tbody tr:last-child td { border-bottom: 0; }
    .rating-card { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 17px; padding: 19px 22px; border: 1px solid #e9e3ff; border-radius: 17px; background: linear-gradient(100deg, #f5f1ff, #fff8f2); }
    .rating-card strong { font-size: 18px; }
    .rating-score { color: #5746aa; font-weight: 800; }
    .rating-score b { font-size: 26px; }
    .rating-stars { color: #db8b33; letter-spacing: 3px; }
    .fine-print { margin: 12px 0 0; color: #74788a; font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 17px; }
    .case-card { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; transition: transform .22s, box-shadow .22s; }
    .media-frame { display: grid; place-items: center; overflow: hidden; background: #f2eff8; aspect-ratio: 16 / 9; }
    .media-frame.square { aspect-ratio: 1 / 1; }
    .media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 18px; }
    .case-copy h3 { font-size: 16px; }
    .case-copy p { font-size: 12px; }
    .feedback-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .feedback-card { padding: 19px; border: 1px solid var(--line); border-radius: 17px; background: #fff; transition: transform .22s, box-shadow .22s; }
    .feedback-card p { margin: 0 0 15px; color: #565b70; font-size: 13px; }
    .feedback-card h3 { margin: 0; font-size: 13px; }
    .feedback-card span { color: #85899a; font-size: 11px; }
    .feedback-note { margin: 12px 0 0; color: #74788a; font-size: 11px; }
    .token-box { display: grid; grid-template-columns: .8fr 1.2fr; gap: 24px; padding: 26px; border: 1px solid #e7e5f1; border-radius: 22px; background: linear-gradient(135deg, #fff 0%, #f6f4ff 58%, #eef9f7 100%); }
    .token-box h3 { margin: 0 0 9px; font-size: 20px; }
    .token-box p { margin: 0; color: var(--muted); font-size: 13px; }
    .token-points { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
    .token-point { padding: 13px; border-radius: 13px; background: rgba(255,255,255,.88); border: 1px solid #ebeaf1; color: #55596c; font-size: 12px; }
    .token-point strong { display: block; margin-bottom: 3px; color: var(--ink); }
    .article-list { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 10px; }
    .article-link { display: flex; min-height: 100px; flex-direction: column; justify-content: space-between; padding: 15px; border: 1px solid var(--line); border-radius: 15px; background: #fff; transition: border-color .2s, transform .2s; }
    .article-link:hover { transform: translateY(-3px); border-color: #c8bafa; }
    .article-link strong { font-size: 13px; line-height: 1.45; }
    .article-link span { color: #777b8d; font-size: 11px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 23px; }
    .tag-cloud span { padding: 8px 12px; border-radius: 9px; background: #fff; border: 1px solid #e8e8f0; color: #5e6275; font-size: 12px; }
    .faq-list { display: grid; gap: 10px; }
    .faq-list details { padding: 0 18px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
    .faq-list summary { position: relative; padding: 16px 30px 16px 0; cursor: pointer; font-weight: 750; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { position: absolute; right: 2px; top: 13px; content: "+"; color: #7159d5; font-size: 22px; font-weight: 400; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: -2px 0 17px; color: var(--muted); font-size: 13px; }
    .contact-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 22px; align-items: start; }
    .contact-card, .form-card { padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
    .contact-card { background: linear-gradient(155deg, #f4f0ff, #f1fbf9 80%); }
    .contact-card h3, .form-card h3 { margin: 0 0 12px; font-size: 19px; }
    .contact-list { display: grid; gap: 10px; margin: 16px 0; color: #52576b; font-size: 13px; }
    .contact-list a { color: #5e4fbd; text-decoration: underline; text-underline-offset: 3px; }
    .qr-wrap { width: min(180px, 100%); overflow: hidden; margin-top: 18px; padding: 8px; border: 1px solid #e4e4ec; border-radius: 14px; background: #fff; }
    .qr-wrap img { display: block; width: 100%; height: auto; }
    .form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 13px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #4f5368; font-size: 12px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid #dfe0ea; border-radius: 10px; outline: none; color: var(--ink); background: #fff; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #8e79e3; box-shadow: 0 0 0 3px rgba(114,84,232,.11); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-submit { margin-top: 14px; }
    .form-hint { margin: 10px 0 0; color: #7a7e8e; font-size: 11px; }
    .site-footer { margin-top: 30px; padding: 30px 0 24px; border-top: 1px solid #e6e7ee; background: #f1f2f8; color: #3e4258; }
    .footer-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; }
    .footer-brand { max-width: 390px; }
    .footer-brand p { margin: 10px 0 0; color: #656a7e; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 17px; max-width: 620px; }
    .footer-links a { color: #53586c; font-size: 12px; text-decoration: underline; text-decoration-color: #c4c5d2; text-underline-offset: 3px; }
    .footer-bottom { margin-top: 21px; padding-top: 15px; border-top: 1px solid #dcdee7; color: #73788a; font-size: 11px; }
    .back-top { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: grid; width: 44px; height: 44px; place-items: center; border: 1px solid #dedbea; border-radius: 14px; background: #fff; color: #5846bb; box-shadow: 0 8px 20px rgba(40,39,70,.12); opacity: 0; visibility: hidden; transform: translateY(8px); transition: .2s; }
    .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes drift { from { transform: translate3d(0,0,0); } to { transform: translate3d(-18px,16px,0); } }
    @media (max-width: 980px) {
      .header-inner { gap: 12px; }
      .nav-links a { padding-inline: 8px; font-size: 12px; }
      .nav-links .nav-cta { margin-left: 4px; padding-inline: 12px; }
      .hero-layout { gap: 28px; }
      .capability-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .article-list { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .header-inner { min-height: 68px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-links { position: absolute; top: calc(100% + 1px); left: 0; right: 0; display: none; align-items: stretch; padding: 10px 15px 15px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 14px 24px rgba(45,44,72,.08); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); }
      .nav-links a { padding: 10px; font-size: 13px; }
      .nav-links .nav-cta { margin: 0; text-align: center; }
      .hero { padding: 55px 0 35px; }
      .hero-layout { grid-template-columns: 1fr; gap: 30px; }
      .hero-panel { max-width: 560px; }
      .metric-strip { grid-template-columns: repeat(2,1fr); }
      section.content-section { padding: 53px 0; }
      .scene-list { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .process-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .solution-layout, .token-box, .contact-layout { grid-template-columns: 1fr; }
      .case-grid, .feedback-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .footer-top { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 520px) {
      .brand-name { font-size: 16px; }
      .ai-page-logo { width: 36px; height: 36px; }
      h1 { font-size: 40px; }
      .hero-lead { font-size: 15px; }
      .hero-panel { padding: 19px; }
      .metric { padding: 14px; }
      .capability-grid, .case-grid, .feedback-grid, .process-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .token-points { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .about-band { padding: 21px; }
      .rating-card { align-items: flex-start; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }