:root {
      --ink: #11172f;
      --muted: #5f6782;
      --paper: #fffdf9;
      --soft: #f5f6fb;
      --line: #e4e7f0;
      --violet: #633cff;
      --pink: #ec3e85;
      --orange: #ff8a3d;
      --cyan: #1bb9c9;
      --green: #20a77a;
      --navy: #10162f;
      --shadow: 0 18px 50px rgba(26, 30, 72, .10);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,253,249,.94);
      border-bottom: 1px solid rgba(228,231,240,.8);
      backdrop-filter: blur(14px);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
    .brand img { width: 42px; max-height: 42px; object-fit: contain; }
    .brand strong { font-size: 18px; letter-spacing: 0; }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 10px;
      font-size: 13px;
      color: #454d6b;
      white-space: nowrap;
    }
    .nav-links a:hover { color: var(--violet); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      border: 0;
      border-radius: 5px;
      padding: 12px 19px;
      font-weight: 700;
      cursor: pointer;
      transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    }
    .nav-cta { color: #fff; background: var(--violet); font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(99,60,255,.22); }
    .button.primary { color: #fff; background: var(--violet); }
    .button.secondary { color: var(--ink); background: #fff; border: 1px solid var(--line); }
    .button.orange { color: #241600; background: #ffba64; }
    .menu-toggle { display: none; background: none; border: 0; font-size: 25px; color: var(--ink); }
    .hero {
      overflow: hidden;
      position: relative;
      background:
        linear-gradient(120deg, rgba(255,255,255,.9), rgba(255,244,246,.84)),
        linear-gradient(135deg, #fff 0%, #f4edff 52%, #fff5df 100%);
      padding: 88px 0 72px;
    }
    .hero:before, .hero:after {
      content: "";
      position: absolute;
      border-radius: 50%;
      pointer-events: none;
      filter: blur(2px);
    }
    .hero:before { width: 410px; height: 410px; right: -150px; top: -150px; background: rgba(255,138,61,.18); }
    .hero:after { width: 300px; height: 300px; left: -150px; bottom: -160px; background: rgba(27,185,201,.15); }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); gap: 64px; align-items: center; }
    .eyebrow, .section-kicker {
      color: var(--violet);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 2px;
      text-transform: uppercase;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 720px; margin-bottom: 22px; font-size: clamp(38px, 5vw, 70px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 630px; color: #4f5873; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
    .hero-note { margin-top: 20px; color: #69718a; font-size: 13px; }
    .audit-panel { position: relative; padding: 26px; background: var(--navy); color: #fff; border-radius: 8px; box-shadow: 20px 22px 0 #ffcf82, var(--shadow); }
    .audit-panel:before { content: ""; display: block; width: 74px; height: 6px; margin-bottom: 24px; border-radius: 10px; background: linear-gradient(90deg, var(--pink), var(--orange), var(--cyan)); }
    .audit-panel h2 { font-size: 22px; margin-bottom: 8px; }
    .audit-panel p { color: #bdc3db; font-size: 14px; }
    .log-list { display: grid; gap: 10px; margin-top: 22px; }
    .log-line { display: grid; grid-template-columns: 76px 1fr auto; gap: 10px; align-items: center; padding: 11px 12px; color: #dfe3f4; background: rgba(255,255,255,.08); border-left: 3px solid var(--cyan); font-size: 12px; }
    .log-line:nth-child(2) { border-color: var(--pink); }
    .log-line:nth-child(3) { border-color: var(--orange); }
    .log-line b { color: #fff; font-weight: 600; }
    .section { padding: 84px 0; }
    .section.alt { background: #f5f6fb; }
    .section.dark { color: #fff; background: var(--navy); }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 34px; }
    .section-head h2 { max-width: 680px; margin: 7px 0 0; font-size: clamp(28px, 3vw, 44px); line-height: 1.2; }
    .section-head p { max-width: 500px; margin-bottom: 0; color: var(--muted); }
    .dark .section-head p { color: #b9c0d6; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .metric { padding: 24px; background: #fff; border-top: 4px solid var(--violet); box-shadow: 0 8px 25px rgba(26,30,72,.06); }
    .metric:nth-child(2) { border-color: var(--pink); }
    .metric:nth-child(3) { border-color: var(--orange); }
    .metric:nth-child(4) { border-color: var(--cyan); }
    .metric strong { display: block; margin-bottom: 5px; font-size: 29px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
    .about-grid h2 { margin: 8px 0 16px; font-size: 39px; line-height: 1.2; }
    .about-grid p { color: var(--muted); }
    .pill-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
    .pill { padding: 7px 12px; color: #4430a8; background: #eeeaff; border-radius: 3px; font-size: 13px; }
    .capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .capability { padding: 25px; background: #fff; border: 1px solid var(--line); transition: transform .25s ease, box-shadow .25s ease; }
    .capability:hover, .review:hover, .case:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
    .capability .icon { width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 17px; color: #fff; background: var(--pink); font-weight: 900; }
    .capability:nth-child(2n) .icon { background: var(--cyan); }
    .capability:nth-child(3n) .icon { background: var(--orange); color: var(--ink); }
    .capability h3 { margin-bottom: 8px; font-size: 19px; }
    .capability p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .service { padding: 17px; border: 1px solid var(--line); background: #fff; }
    .service b { display: block; margin-bottom: 5px; font-size: 15px; }
    .service span { color: var(--muted); font-size: 12px; }
    .process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
    .step { position: relative; padding: 23px 18px; border-top: 3px solid var(--violet); background: #fff; }
    .step:not(:last-child):after { content: "→"; position: absolute; right: -17px; top: 42px; z-index: 2; color: var(--pink); font-weight: 900; }
    .step-no { color: var(--pink); font-size: 13px; font-weight: 900; }
    .step h3 { margin: 9px 0 6px; font-size: 17px; }
    .step p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .solution { padding: 25px; color: #fff; background: linear-gradient(135deg, #33206e, #633cff); }
    .solution:nth-child(2) { background: linear-gradient(135deg, #922d5e, #ec3e85); }
    .solution:nth-child(3) { background: linear-gradient(135deg, #087a88, #1bb9c9); }
    .solution h3 { margin-bottom: 9px; }
    .solution p { margin-bottom: 0; color: #f5f2ff; font-size: 14px; }
    .network { display: flex; flex-wrap: wrap; gap: 10px; padding: 24px; background: #fff; border: 1px solid var(--line); }
    .network span { padding: 8px 13px; color: #2d3560; background: #f0f1f8; font-size: 13px; }
    .comparison-wrap { display: grid; grid-template-columns: .7fr 1.3fr; gap: 28px; align-items: start; }
    .score { padding: 30px; color: #fff; background: var(--navy); }
    .score strong { display: block; color: #ffba64; font-size: 56px; line-height: 1; }
    .score .stars { margin: 18px 0; color: #ffba64; letter-spacing: 4px; font-size: 22px; }
    .score p { color: #c6cbe0; font-size: 14px; }
    .table-scroll { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 650px; border-collapse: collapse; }
    th, td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; }
    th { color: #fff; background: var(--violet); }
    td:first-child { font-weight: 700; }
    td:last-child { color: var(--green); font-weight: 700; }
    .price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .price { padding: 23px; border: 1px solid var(--line); background: #fff; }
    .price h3 { margin-bottom: 6px; }
    .price strong { display: block; margin: 12px 0; color: var(--violet); font-size: 28px; }
    .price p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case { overflow: hidden; background: #fff; border: 1px solid var(--line); transition: transform .25s ease, box-shadow .25s ease; }
    .case-media { aspect-ratio: 16 / 9; overflow: hidden; background: #eceef8; }
    .case-media img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 19px; }
    .case-body h3 { margin-bottom: 6px; }
    .case-body p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .review { padding: 24px; background: #fff; border: 1px solid var(--line); transition: transform .25s ease, box-shadow .25s ease; }
    .review .quote { margin-bottom: 16px; color: var(--violet); font-size: 28px; line-height: 1; }
    .review p { color: #4f5873; font-size: 14px; }
    .review small { color: var(--muted); font-weight: 700; }
    .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 26px; }
    details { padding: 17px 0; border-bottom: 1px solid var(--line); }
    summary { cursor: pointer; list-style: none; padding-right: 24px; font-weight: 700; position: relative; }
    summary::-webkit-details-marker { display: none; }
    summary:after { content: "+"; position: absolute; right: 0; color: var(--violet); font-size: 20px; }
    details[open] summary:after { content: "−"; }
    details p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
    .article-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article { display: block; padding: 17px; min-height: 145px; background: #fff; border: 1px solid var(--line); }
    .article em { color: var(--pink); font-style: normal; font-size: 12px; }
    .article h3 { margin: 10px 0 0; font-size: 15px; line-height: 1.45; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 45px; align-items: start; }
    .contact-info h2 { margin: 8px 0 15px; font-size: 40px; }
    .contact-info p { color: #c5cbe0; }
    .contact-list { display: grid; gap: 10px; margin-top: 25px; }
    .contact-list div { padding: 12px 15px; color: #dce0ee; background: rgba(255,255,255,.08); font-size: 14px; }
    .form { padding: 27px; background: #fff; color: var(--ink); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    label { display: grid; gap: 7px; color: #4d5671; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 12px 13px; border: 1px solid var(--line); border-radius: 3px; outline: 0; color: var(--ink); background: #fff; font: inherit; }
    input:focus, select:focus, textarea:focus { border-color: var(--violet); box-shadow: 0 0 0 3px rgba(99,60,255,.1); }
    textarea { min-height: 120px; resize: vertical; }
    .full { grid-column: 1 / -1; }
    .form .button { margin-top: 17px; }
    .qr-row { display: flex; gap: 20px; align-items: center; margin-top: 20px; }
    .qr-row img { width: 105px; padding: 7px; background: #fff; }
    .footer { padding: 38px 0 24px; color: #c3c9dc; background: #0b1025; }
    .footer-grid { display: grid; grid-template-columns: 1fr 1.4fr .8fr; gap: 35px; }
    .footer strong { color: #fff; }
    .footer p { font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 12px 18px; }
    .footer-links a { color: #d8dced; font-size: 13px; }
    .footer-links a:hover { color: #ffba64; }
    .copyright { display: flex; justify-content: space-between; gap: 20px; margin-top: 30px; padding-top: 17px; border-top: 1px solid rgba(255,255,255,.13); font-size: 12px; }
    .float-contact, .back-top { position: fixed; right: 20px; z-index: 15; border: 0; cursor: pointer; color: #fff; box-shadow: 0 10px 25px rgba(16,22,47,.2); }
    .float-contact { bottom: 78px; padding: 12px 15px; background: var(--pink); border-radius: 4px; }
    .back-top { bottom: 20px; width: 40px; height: 40px; background: var(--violet); border-radius: 4px; opacity: 0; pointer-events: none; transition: opacity .2s; }
    .back-top.visible { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.show { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 12px 20px 18px; background: var(--paper); border-bottom: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: block; }
      .nav-cta { display: none; }
      .hero-grid, .about-grid, .contact-grid, .comparison-wrap { grid-template-columns: 1fr; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .process { grid-template-columns: repeat(3, 1fr); }
      .step:not(:last-child):after { display: none; }
      .article-grid { grid-template-columns: repeat(3, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 680px) {
      .container { width: min(100% - 28px, 1180px); }
      .hero { padding: 62px 0 55px; }
      .section { padding: 60px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 14px; }
      .metrics, .capability-grid, .solution-grid, .price-grid, .case-grid, .reviews, .faq-grid, .service-grid, .process, .article-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .full { grid-column: auto; }
      .hero-actions .button { width: 100%; }
      .audit-panel { box-shadow: 10px 12px 0 #ffcf82, var(--shadow); }
      .footer-grid { grid-template-columns: 1fr; }
      .copyright { display: block; }
      .copyright span { display: block; margin-top: 6px; }
      .nav-links.open { grid-template-columns: repeat(2, 1fr); }
    }