:root {
      color-scheme: light;
      --ink: #18362d;
      --muted: #587068;
      --green: #176b4d;
      --green-dark: #10563d;
      --mint: #dcefe3;
      --lime: #d7ed90;
      --paper: #f5faf6;
      --white: #fff;
      --line: #d9e7dc;
      --coral: #c85c45;
      --blue: #376e8b;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      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; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; z-index: 10; top: 0; background: rgba(245,250,246,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; font-weight: 800; font-size: 18px; }
    .brand img { display: block; width: 38px; max-height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 10px 11px; color: #36564a; font-size: 13px; border-radius: 4px; transition: background .2s, color .2s; }
    .nav-links a:hover { background: #e5f2e8; color: var(--green-dark); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--green); border-radius: 4px; padding: 11px 17px; color: white; background: var(--green); font-weight: 700; transition: transform .2s, background .2s, box-shadow .2s; }
    .nav-cta { white-space: nowrap; padding: 9px 14px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 8px 18px rgba(23,107,77,.16); }
    .button.secondary { color: var(--green-dark); background: transparent; }
    .button.secondary:hover { background: #e7f3e9; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); background: white; font-size: 20px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; background: #eaf5ec; border-bottom: 1px solid var(--line); }
    .hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent 0 62%, rgba(215,237,144,.38) 62% 78%, transparent 78%), repeating-linear-gradient(90deg, transparent 0 79px, rgba(23,107,77,.045) 80px); pointer-events: none; }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0,1.15fr) minmax(270px,.85fr); gap: 54px; align-items: center; padding-block: 76px 66px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green); font-size: 13px; font-weight: 800; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); }
    h1 { max-width: 720px; margin: 14px 0 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 640px; margin: 0; color: #49665a; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 18px; color: var(--muted); font-size: 13px; }
    .hero-panel { padding: 26px; border: 1px solid #c9dfce; border-left: 4px solid var(--green); background: rgba(255,255,255,.72); animation: rise .7s both; }
    .hero-panel h2 { margin: 0 0 19px; font-size: 16px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 6px 9px; border: 1px solid #d7e8da; background: #f5faf6; color: #36594a; font-size: 12px; }
    .hero-panel p { margin: 18px 0 0; color: var(--muted); font-size: 13px; }
    .metrics { position: relative; display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid var(--line); background: white; }
    .metric { padding: 19px 22px; border-right: 1px solid var(--line); }
    .metric:last-child { border: 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 20px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding: 76px 0; }
    .section.alt { background: #edf6ef; border-block: 1px solid #dfebe1; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 30px; }
    .section-head > div { max-width: 700px; }
    .kicker { margin: 0 0 7px; color: var(--green); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(26px, 3vw, 36px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { margin: 12px 0 0; color: var(--muted); }
    h3 { margin: 0; font-size: 18px; line-height: 1.4; }
    .text-link { color: var(--green-dark); font-weight: 700; text-decoration: underline; text-decoration-color: #a8cbb2; text-underline-offset: 4px; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: start; }
    .intro-copy p { margin: 0 0 16px; color: #49665a; }
    .capability-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 24px; border-top: 1px solid var(--line); }
    .capability-list div { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .capability-list strong { display: block; font-size: 14px; }
    .capability-list span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
    .service-item { min-height: 158px; padding: 21px; background: white; transition: transform .2s, box-shadow .2s; }
    .service-item:hover { position: relative; z-index: 1; transform: translateY(-3px); box-shadow: 0 10px 24px rgba(24,54,45,.09); }
    .service-item .num { display: block; margin-bottom: 18px; color: var(--coral); font-size: 12px; font-weight: 800; }
    .service-item p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 24px; counter-reset: step; }
    .step { position: relative; padding: 20px 18px 18px 0; border-top: 2px solid var(--green); counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin-bottom: 15px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .step p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
    .scenario-strip { display: grid; grid-template-columns: .8fr 1.2fr; gap: 46px; align-items: start; }
    .scenario-strip p { margin: 14px 0 20px; color: var(--muted); }
    .scenario-tags { display: flex; flex-wrap: wrap; gap: 9px; }
    .scenario-tags span { padding: 7px 11px; border: 1px solid #c9dfce; color: #305846; background: #fff; font-size: 13px; }
    .image-pair { display: grid; grid-template-columns: 1.35fr .8fr; gap: 18px; align-items: start; }
    .image-frame { overflow: hidden; border: 1px solid var(--line); background: white; }
    .image-frame img { display: block; width: 100%; height: auto; }
    .image-caption { padding: 12px 15px; color: #49665a; font-size: 13px; }
    .assessment { display: grid; grid-template-columns: .65fr 1.35fr; gap: 38px; align-items: start; }
    .score-panel { padding: 24px; color: white; background: var(--green-dark); }
    .score-panel .score { display: block; margin: 8px 0 2px; color: var(--lime); font-size: 54px; font-weight: 800; line-height: 1; }
    .score-panel p { margin: 10px 0 0; color: #e0eee5; font-size: 13px; }
    .stars { color: var(--lime); font-size: 21px; letter-spacing: 0; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; min-width: 620px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #e3ece5; vertical-align: top; font-size: 13px; }
    th { color: #355a48; background: #edf6ef; }
    tr:last-child td { border-bottom: 0; }
    td:first-child { width: 25%; font-weight: 700; }
    .reviews { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
    .review { padding: 20px; border-top: 3px solid var(--mint); background: white; }
    .review p { margin: 0 0 17px; color: #405e51; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .review-note { margin: 16px 0 0; color: var(--muted); font-size: 12px; }
    .network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 38px; align-items: start; }
    .network-copy p { color: var(--muted); }
    .network-copy .model-cloud { margin-top: 19px; }
    .network-points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .network-point { padding: 16px; border-left: 2px solid var(--coral); background: white; }
    .network-point strong { display: block; font-size: 14px; }
    .network-point span { color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; top: 13px; right: 4px; color: var(--green); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 820px; margin: 0; padding: 0 34px 18px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 12px; }
    .article-link { display: flex; min-height: 90px; align-items: center; justify-content: space-between; gap: 12px; padding: 15px; border: 1px solid var(--line); background: white; font-size: 13px; font-weight: 700; transition: border-color .2s, transform .2s; }
    .article-link:hover { transform: translateY(-2px); border-color: var(--green); }
    .article-link span:last-child { color: var(--coral); }
    .contact-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 42px; align-items: start; }
    .contact-details { padding-top: 4px; }
    .contact-details p { margin: 10px 0; color: var(--muted); }
    .contact-details a { color: var(--green-dark); font-weight: 700; }
    .contact-details img { display: block; width: 142px; margin-top: 18px; border: 1px solid var(--line); }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; border: 1px solid var(--line); background: white; }
    .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%; min-width: 0; padding: 11px 12px; border: 1px solid #cbdcd0; border-radius: 2px; color: var(--ink); background: #fbfdfb; }
    .field textarea { min-height: 112px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid #a7cfb2; outline-offset: 1px; }
    .contact-form button { justify-self: start; cursor: pointer; }
    .footer { padding: 27px 0; border-top: 1px solid var(--line); color: #36564a; background: #eaf3ec; }
    .footer-top { display: flex; align-items: start; justify-content: space-between; gap: 25px; }
    .footer p { margin: 3px 0; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 12px; }
    .footer-links a { color: #315c48; text-decoration: underline; text-decoration-color: #b2cdb9; text-underline-offset: 3px; }
    .footer-bottom { margin-top: 15px; padding-top: 12px; border-top: 1px solid #d3e2d6; font-size: 11px; }
    .floating-contact { position: fixed; z-index: 9; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
    .floating-contact a { display: inline-flex; min-height: 42px; align-items: center; justify-content: center; padding: 0 13px; border: 1px solid var(--green); color: white; background: var(--green); box-shadow: 0 4px 14px rgba(24,54,45,.15); font-size: 12px; font-weight: 700; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes rise { from { opacity: 0; transform: translateY(10px); } 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: 980px) {
      .nav { gap: 12px; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-cta { display: none; }
      .service-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
      .article-list { grid-template-columns: repeat(3,minmax(0,1fr)); }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .nav { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; align-items: stretch; padding: 10px 15px 15px; border-bottom: 1px solid var(--line); background: var(--paper); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
      .nav-links a { padding: 10px; font-size: 14px; }
      .hero-inner { grid-template-columns: 1fr; gap: 30px; padding-block: 54px 40px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-panel { max-width: 560px; }
      .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: 56px 0; }
      .section-head { display: block; }
      .section-head > .text-link { display: inline-block; margin-top: 15px; }
      .intro-grid, .scenario-strip, .assessment, .network-grid, .contact-grid { grid-template-columns: 1fr; gap: 27px; }
      .service-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .service-item { min-height: 150px; padding: 16px; }
      .workflow { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px 20px; }
      .reviews { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .image-pair { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .footer-top { flex-direction: column; }
    }
    @media (max-width: 460px) {
      h1 { font-size: 36px; }
      .hero-actions { display: grid; grid-template-columns: 1fr; }
      .hero-actions .button { width: 100%; }
      .capability-list, .network-points, .reviews, .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .workflow { grid-template-columns: 1fr; gap: 4px; }
      .article-list { grid-template-columns: 1fr; }
      .floating-contact { right: 10px; bottom: 10px; }
      .floating-contact a { min-height: 38px; }
    }