:root {
      color-scheme: light;
      --ink: #18222d;
      --muted: #596875;
      --paper: #f7f9fb;
      --white: #fff;
      --line: #dce5e8;
      --cyan: #00b9aa;
      --lime: #c8f45b;
      --coral: #ff765c;
      --navy: #172a32;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    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: relative; z-index: 5; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.96); }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 9px 10px; text-decoration: none; color: #43515d; font-size: 13px; }
    .nav-links a:hover, .nav-links a:focus-visible { color: #008f84; }
    .nav-links .nav-cta { margin-left: 10px; padding: 10px 15px; border-radius: 4px; background: var(--navy); color: white; font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); padding: 8px 11px; border-radius: 4px; }
    .hero { position: relative; overflow: hidden; padding: 72px 0 58px; background: var(--navy); color: white; }
    .hero::before { position: absolute; inset: auto -8% -150px 42%; height: 340px; content: ""; background: linear-gradient(100deg, rgba(0,185,170,.22), rgba(200,244,91,.17), rgba(255,118,92,.1)); transform: rotate(-9deg); border: 1px solid rgba(200,244,91,.25); }
    .hero::after { position: absolute; right: 7%; top: 54px; width: 120px; height: 120px; content: ""; border: 1px solid rgba(200,244,91,.48); border-radius: 50%; box-shadow: 0 0 0 18px rgba(0,185,170,.06), 0 0 0 38px rgba(255,118,92,.05); }
    .hero-inner { position: relative; z-index: 1; max-width: 820px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--lime); font-weight: 700; font-size: 13px; letter-spacing: .04em; }
    .eyebrow::before { width: 22px; height: 2px; content: ""; background: currentColor; }
    h1 { max-width: 760px; margin: 20px 0 15px; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; }
    .hero p { max-width: 660px; margin: 0; color: #dce9e9; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 18px; border: 1px solid transparent; border-radius: 4px; background: var(--lime); color: #162324; text-decoration: none; font-weight: 800; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0,0,0,.18); }
    .button-outline { border-color: rgba(255,255,255,.48); background: transparent; color: white; }
    .hero-note { margin-top: 17px !important; color: #b9ccce !important; font-size: 13px !important; }
    .metrics { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 38px; border-top: 1px solid rgba(255,255,255,.18); }
    .metric { padding: 19px 18px 0 0; }
    .metric strong { display: block; color: var(--lime); font-size: 22px; }
    .metric span { color: #d0dddd; font-size: 13px; }
    .section { padding: 66px 0; }
    .section-head { max-width: 740px; margin-bottom: 29px; }
    .section-kicker { margin: 0 0 8px; color: #008f84; font-size: 12px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
    h2 { margin: 0 0 10px; font-size: clamp(27px, 4vw, 39px); line-height: 1.2; letter-spacing: 0; }
    .section-head > p:last-child { margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
    .intro-copy { max-width: 650px; color: var(--muted); }
    .intro-copy p { margin: 0 0 14px; }
    .signal-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; margin: 20px 0 0; padding: 0; list-style: none; }
    .signal-list li { padding: 10px 0; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 14px; }
    .signal-list li::before { content: "＋"; margin-right: 8px; color: #009d91; font-weight: 800; }
    .callout { padding: 24px; border-left: 4px solid var(--coral); background: #fff; }
    .callout strong { display: block; margin-bottom: 8px; font-size: 19px; }
    .callout p { margin: 0; color: var(--muted); font-size: 14px; }
    .services { background: #eef4f3; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; border: 1px solid #d8e3e1; background: #d8e3e1; }
    .service-item { min-height: 175px; padding: 22px; background: #f7faf9; transition: background .2s ease, transform .2s ease; }
    .service-item:hover { position: relative; z-index: 1; background: white; transform: translateY(-3px); }
    .service-no { color: #009d91; font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 9px 0 7px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .tool-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 25px; }
    .tool-strip span { padding: 6px 10px; border: 1px solid #c8d5d3; background: white; color: #34444a; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; counter-reset: flow; }
    .flow-step { padding-top: 17px; border-top: 2px solid var(--cyan); counter-increment: flow; }
    .flow-step::before { content: "0" counter(flow); color: #009d91; font-size: 13px; font-weight: 800; }
    .flow-step h3 { margin: 8px 0 6px; font-size: 17px; }
    .flow-step p { margin: 0; color: var(--muted); font-size: 14px; }
    .plan-band { padding: 28px; background: #e8f4e7; border: 1px solid #d2e6ce; }
    .plan-band h3 { margin: 0 0 7px; font-size: 20px; }
    .plan-band p { max-width: 850px; margin: 0; color: #40554d; }
    .plan-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
    .plan-tags span { padding: 6px 10px; background: #fff; color: #35463e; font-size: 13px; }
    .dark-section { background: #172a32; color: white; }
    .dark-section .section-kicker { color: var(--lime); }
    .dark-section .section-head > p:last-child { color: #c2d0d1; }
    .network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: start; }
    .network-grid p { color: #c2d0d1; }
    .network-points { margin: 0; padding: 0; list-style: none; }
    .network-points li { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.2); color: #e9f1f0; }
    .network-points strong { display: block; color: var(--lime); font-size: 14px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    thead th { background: #eaf4f2; color: #25383b; font-size: 13px; }
    tbody th { min-width: 150px; font-size: 14px; }
    td { color: var(--muted); font-size: 14px; }
    .rating { display: flex; align-items: center; gap: 19px; margin: 0 0 20px; padding: 19px 22px; background: var(--navy); color: white; }
    .rating-score { color: var(--lime); font-size: 32px; font-weight: 800; white-space: nowrap; }
    .rating p { margin: 0; color: #e2ecea; }
    .rating small { display: block; color: #b8c9c8; }
    .cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { padding: 20px; border-top: 3px solid var(--coral); background: white; }
    .case:nth-child(2) { border-color: var(--cyan); }
    .case:nth-child(3) { border-color: #a4cc32; }
    .case span { color: #008f84; font-size: 12px; font-weight: 800; }
    .case h3 { margin: 8px 0; font-size: 18px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .reviews { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
    .review { padding: 18px; background: white; border: 1px solid var(--line); }
    .review blockquote { margin: 0 0 14px; color: #35434c; font-size: 14px; }
    .review cite { color: #008f84; font-size: 13px; font-style: normal; font-weight: 800; }
    .review-note { margin: 15px 0 0; color: var(--muted); font-size: 12px; }
    .article-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .article-link { display: flex; min-height: 90px; flex-direction: column; justify-content: center; padding: 16px; background: white; text-decoration: none; }
    .article-link:hover { background: #f0f8f6; }
    .article-link strong { font-size: 14px; }
    .article-link span { margin-top: 4px; color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 16px 36px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { position: absolute; right: 4px; top: 14px; content: "+"; color: #008f84; font-size: 22px; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 800px; margin: 0 0 16px; color: var(--muted); font-size: 14px; }
    .contact { background: #eef4f3; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 40px; align-items: start; }
    .contact-details p { color: var(--muted); }
    .contact-details a { color: #007e74; }
    .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: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { color: #34434a; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #cbd6d8; border-radius: 3px; background: white; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .contact-form .button { grid-column: 1 / -1; justify-self: start; border: 0; cursor: pointer; }
    .contact-form .form-note { grid-column: 1 / -1; margin: -8px 0 0; color: var(--muted); font-size: 12px; }
    .site-footer { padding: 25px 0; background: #e5ecec; color: #293940; }
    .footer-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
    .footer-top p { margin: 7px 0 0; color: #516067; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 17px; max-width: 620px; }
    .footer-links a { color: #34474e; font-size: 13px; text-decoration: none; }
    .footer-bottom { margin-top: 17px; padding-top: 13px; border-top: 1px solid #cbd6d7; color: #536168; font-size: 12px; }
    .floating-contact { position: fixed; right: 18px; bottom: 18px; z-index: 8; }
    .floating-contact details { position: relative; }
    .floating-contact summary { display: grid; width: 54px; height: 54px; place-items: center; border: 0; border-radius: 50%; background: var(--cyan); color: #102c2a; cursor: pointer; font-size: 12px; font-weight: 800; list-style: none; box-shadow: 0 5px 18px rgba(0,0,0,.18); }
    .floating-contact summary::-webkit-details-marker { display: none; }
    .contact-popover { position: absolute; right: 0; bottom: 66px; width: 245px; padding: 15px; border: 1px solid var(--line); background: white; box-shadow: 0 8px 30px rgba(20,40,45,.16); color: var(--ink); }
    .contact-popover img { display: block; width: 150px; max-width: 100%; height: auto; margin: 10px auto; }
    .contact-popover p { margin: 5px 0; color: var(--muted); font-size: 13px; }
    .back-top { position: fixed; right: 26px; bottom: 84px; z-index: 7; display: none; width: 38px; height: 38px; border: 1px solid #b8c8c8; background: white; color: var(--ink); cursor: pointer; }
    .back-top.visible { display: block; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { opacity: 1; transform: none; }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 920px) {
      .header-inner { min-height: 68px; }
      .menu-toggle { display: inline-flex; align-items: center; }
      .nav-links { position: absolute; top: 100%; left: 0; right: 0; display: none; align-items: stretch; padding: 10px 20px 16px; border-bottom: 1px solid var(--line); background: white; }
      .nav-links.open { display: flex; flex-direction: column; }
      .nav-links a { padding: 9px 4px; }
      .nav-links .nav-cta { align-self: flex-start; margin: 8px 0 0; padding-inline: 14px; }
      .intro-grid, .network-grid, .contact-grid { grid-template-columns: 1fr; gap: 26px; }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero { padding: 54px 0 40px; }
      .hero::after { right: -28px; top: 30px; transform: scale(.72); }
      .hero-inner { max-width: 100%; }
      .hero p { font-size: 15px; }
      .metrics { grid-template-columns: repeat(2, 1fr); row-gap: 15px; }
      .metric { padding-top: 14px; }
      .section { padding: 48px 0; }
      .service-grid { grid-template-columns: 1fr; }
      .service-item { min-height: 0; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 20px 16px; }
      .cases, .reviews { grid-template-columns: 1fr; }
      .article-grid { grid-template-columns: 1fr; }
      .signal-list { grid-template-columns: 1fr; }
      .rating { align-items: flex-start; flex-direction: column; gap: 5px; }
      .contact-form { grid-template-columns: 1fr; padding: 17px; }
      .field-wide, .contact-form .button, .contact-form .form-note { grid-column: 1; }
      .footer-top { flex-direction: column; }
      .comparison-wrap table { min-width: 680px; }
      .floating-contact { right: 12px; bottom: 12px; }
      .back-top { right: 20px; bottom: 78px; }
    }