:root {
      --brand: #1677ff;
      --brand-2: #0958d9;
      --brand-3: #003eb3;
      --accent: #1677ff;
      --accent-hover: #0958d9;
      --tech: #4096ff;
      --ink: #0f2233;
      --text: #334155;
      --text-2: #62748a;
      --muted: #94a3b8;
      --bg: #f4f8fc;
      --surface: #ffffff;
      --surface-2: #eef4fb;
      --border: #e1ebf4;
      --radius: 20px;
      --radius-sm: 14px;
      --shadow-sm: 0 1px 3px rgba(15,37,64,.06), 0 1px 2px rgba(15,37,64,.05);
      --shadow: 0 14px 38px -16px rgba(15,37,64,.22);
      --shadow-lg: 0 30px 70px -24px rgba(15,37,64,.34);
      --max-width: 1200px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    section[id], [id]:target { scroll-margin-top: 110px; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text);
      background: var(--bg);
      line-height: 1.72;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; }
    ::selection { background: rgba(22,119,255,.18); }

    .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
    .section { padding: 100px 0; }
    .section-head { text-align: center; max-width: 760px; margin: 0 auto 60px; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      background: rgba(22,119,255,.08); color: var(--brand-3);
      padding: 7px 16px; border-radius: 999px;
      font-size: 13px; font-weight: 600; margin-bottom: 18px;
      border: 1px solid rgba(22,119,255,.2);
    }
    .eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
    .section-title { font-size: clamp(30px, 5vw, 44px); font-weight: 800; letter-spacing: -0.02em; color: var(--ink); margin-bottom: 16px; line-height: 1.2; }
    .section-subtitle { font-size: 16px; color: var(--text-2); }

    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 9px;
      padding: 15px 32px; border-radius: 999px; font-weight: 600; font-size: 16px;
      transition: all .22s cubic-bezier(.4,0,.2,1); border: none; cursor: pointer; white-space: nowrap;
    }
    .btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; box-shadow: 0 10px 26px -10px rgba(22,119,255,.5); }
    .btn-primary:hover { background: linear-gradient(135deg, var(--brand-2), var(--brand-3)); transform: translateY(-2px); box-shadow: 0 16px 34px -10px rgba(9,88,217,.55); }
    .btn-ghost { background: #fff; color: var(--brand); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
    .btn-ghost:hover { border-color: var(--brand); background: #f4f7fb; transform: translateY(-2px); }
    .btn-light { background: #fff; color: var(--brand); }
    .btn-light:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -12px rgba(0,0,0,.3); }

    /* Top bar */
    .topbar {
      position: sticky; top: 0; z-index: 100;
      background: rgba(255,255,255,.82);
      backdrop-filter: blur(16px) saturate(160%);
      -webkit-backdrop-filter: blur(16px) saturate(160%);
      border-bottom: 1px solid var(--border);
    }
    .topbar .container { display: flex; align-items: center; justify-content: space-between; height: 35px; }
    .topbar-logo { height: 28px; width: auto; }
    .topbar-cta { display: none; }

    /* Hamburger */
    .nav-toggle {
      display: none; width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 10px;
      background: #fff; cursor: pointer; flex-direction: column; gap: 5px; align-items: center; justify-content: center;
    }
    .nav-toggle span { width: 20px; height: 2px; background: var(--brand); border-radius: 2px; transition: .25s; }
    .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .mobile-menu {
      display: none; position: fixed; top: 95px; left: 0; right: 0; z-index: 99;
      background: #fff; border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
      padding: 12px 24px 20px; flex-direction: column; gap: 4px;
    }
    .mobile-menu.show { display: flex; }
    .mobile-menu a { padding: 13px 8px; font-size: 15px; font-weight: 500; color: var(--text); border-bottom: 1px solid var(--surface-2); }
    .mobile-menu a:last-child { border-bottom: none; }
    .mobile-menu a.active { color: var(--brand-3); font-weight: 700; }

    /* Sub bar glass */
    .subbar {
      position: sticky; top: 35px; z-index: 98;
      height: 60px;
      background: rgba(255,255,255,.7);
      backdrop-filter: blur(18px) saturate(170%);
      -webkit-backdrop-filter: blur(18px) saturate(170%);
      border-bottom: 1px solid rgba(225,235,244,.9);
      box-shadow: 0 6px 24px rgba(22,119,255,.06);
    }
    .subbar .container { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 16px; }
    .subbar-left { display: flex; align-items: center; gap: 10px; }
    .subbar-logo { height: 26px; width: auto; }
    .subbar-name { font-size: 15px; font-weight: 600; color: var(--ink); white-space: nowrap; }
    .subbar-name small { display: block; font-size: 12px; font-weight: 400; color: var(--text-2); margin-top: 2px; }
    .subbar-nav { display: flex; gap: 26px; font-size: 15px; font-weight: 500; color: var(--text-2); }
    .subbar-nav a { position: relative; padding: 10px 0; transition: color .2s; white-space: nowrap; }
    .subbar-nav a::after { content: ""; position: absolute; left: 0; bottom: 4px; width: 0; height: 2px; background: var(--brand); transition: width .25s; }
    .subbar-nav a:hover { color: var(--brand-3); }
    .subbar-nav a:hover::after, .subbar-nav a.active::after { width: 100%; }
    .subbar-nav a.active { color: var(--brand-3); font-weight: 700; }

    /* Hero */
    .hero {
      position: relative; overflow: hidden;
      min-height: calc((100vh - 119px) * 0.8);
      display: flex; align-items: center;
      padding: 77px 0 88px;
      color: var(--ink);
      background: url("../images/home/hero-platform.jpg") center/100% auto no-repeat;
    }
    /* 当视口窄高（hero 容器高/宽比超过图片本身 ≈0.486，约视口宽高比 <1.4:1 时），
       改为按高度展示、左右居中 */
    @media (max-aspect-ratio: 14/10) {
      .hero { background-size: auto 100%; }
    }
    .hero::before {
      content: "";
      position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(255,255,255,.95) 0%, rgba(255,255,255,.78) 45%, rgba(255,255,255,.28) 72%, transparent 100%);
      z-index: 0;
    }
    .hero-grid { display: none; }
    .hero-glow { display: none; }
    .hero .container { position: relative; z-index: 1; max-width: var(--max-width); }
    .hero-left { max-width: 900px; }
    .hero .eyebrow { background: rgba(22,119,255,.08); color: var(--brand-3); border-color: rgba(22,119,255,.22); }
    .hero .eyebrow::before { background: var(--brand); }
    .hero h1 { font-size: clamp(40px, 7vw, 72px); line-height: 1.06; font-weight: 900; letter-spacing: -0.03em; margin-bottom: 22px; color: var(--ink); }
    .hero h1 em { font-style: normal; background: linear-gradient(135deg, var(--brand), var(--brand-3)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
    .hero-sub { font-size: 18.5px; font-weight: 700; color: var(--text); margin-bottom: 26px; max-width: 540px; }
    .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
    .hero .btn-ghost { background: #fff; color: var(--brand); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
    .hero .btn-ghost:hover { border-color: var(--brand); background: #f4f7fb; transform: translateY(-2px); }
    .hero-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 36px; }
    .hero-tags span { font-size: 12px; color: var(--text-2); background: rgba(255,255,255,.7); border: 1px solid var(--border); padding: 6px 12px; border-radius: 999px; }

    /* Hero dashboard card 已按需求删除 */

    /* Intro */
    .intro { background: var(--surface); }
    .intro-grid { display: grid; grid-template-columns: 777px 1fr; gap: 64px; align-items: center; }
    .intro h2 { font-size: clamp(28px, 4vw, 36px); font-weight: 800; color: var(--ink); margin-bottom: 12px; letter-spacing: -0.02em; }
    .intro .sub { font-size: 16px; color: var(--accent); font-weight: 600; margin-bottom: 22px; }
    .intro p { color: var(--text); margin-bottom: 15px; }
    .intro-text { max-width: 777px; }
    .intro-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid var(--border); width: 300px; margin-left: auto; }
    .intro-img img { width: 300px; height: 444px; object-fit: cover; }

    /* Tabs shared */
    .tabs { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
    .tab {
      padding: 12px 24px; border-radius: 999px; font-weight: 600; font-size: 15px;
      background: var(--surface); color: var(--text-2); border: 1px solid var(--border);
      cursor: pointer; transition: all .22s; white-space: nowrap;
    }
    .tab:hover { border-color: var(--brand-3); color: var(--brand); }
    .tab.active { background: var(--brand); color: #fff; border-color: var(--brand); box-shadow: 0 8px 20px -8px rgba(10,37,64,.5); }
    .tab-panels { position: relative; overflow: hidden; }
    .tab-panel { display: none; }
    .tab-panel.active { display: block; }
    .tab-panel.leaving { display: block; animation: slideOutLeft .5s cubic-bezier(.55,.06,.68,.19) forwards; }
    .tab-panel.entering { display: block; animation: slideInRight .5s cubic-bezier(.22,1,.36,1) forwards; }
    @keyframes slideOutLeft { from{opacity:1; transform:translateX(0)} to{opacity:0; transform:translateX(-100%)} }
    @keyframes slideInRight { from{opacity:0; transform:translateX(60px)} to{opacity:1; transform:translateX(0)} }

    /* Business — 仿 lzqz.cn「主营业务」卡片栅格 */
    .business { background: var(--surface); }
    .business .section-title::after {
      content: ""; display: block; width: 56px; height: 4px; margin: 18px auto 0;
      background: linear-gradient(90deg, var(--brand), #ff7d1a); border-radius: 2px;
    }
    /* 仿 lzqz「主营业务」：顶部一排 tab 按钮 + 下方左图右文（无卡片样式，图片完整展示） */
    .biz-detail {
      max-width: 960px; margin: 0 auto; display: flex; align-items: center; gap: 44px;
    }
    .biz-detail-img { flex: 0 0 auto; width: 340px; height: auto; overflow: hidden; align-self: flex-start; }
    .biz-detail-img img { display: block; width: 100%; height: auto; object-fit: contain; }
    .biz-detail-body { flex: 1; padding: 6px 0; display: flex; flex-direction: column; justify-content: center; text-align: left; }
    .biz-detail--reverse { flex-direction: row-reverse; }
    .biz-detail--reverse .biz-detail-body { text-align: right; align-items: flex-end; }
    .biz-detail--reverse .biz-tags { justify-content: flex-end; }
    .biz-detail-body h3 { font-size: 1.4rem; font-weight: 700; color: #1f2937; line-height: 1.4; margin-bottom: 14px; }
    .biz-detail-body p { font-size: 0.95rem; color: #4b5563; line-height: 1.7; margin: 0; }
    .biz-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .biz-tags span { font-size: 12.5px; font-weight: 500; color: #1d4ed8; background: #eff5ff; padding: 6px 13px; border-radius: 999px; border: 1px solid #dbeafe; }

    /* Services */
    .services { background: var(--surface); }
    .svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .svc-card {
      background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
      padding: 34px 30px; text-align: left; position: relative;
      transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
    }
    .svc-card:hover {
      transform: translateY(-6px) scale(1.05);
      border-color: var(--brand);
      box-shadow: var(--shadow-lg);
      z-index: 2;
    }
    .svc-card .num {
      width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
      background: linear-gradient(135deg, var(--brand), var(--tech)); color: #fff;
      font-weight: 700; font-size: 18px; margin-bottom: 18px;
      box-shadow: 0 8px 18px -8px rgba(22,119,255,.5);
    }
    .svc-card h4 { font-size: 19px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
    .svc-card p { font-size: 14.5px; color: var(--text); line-height: 1.7; margin: 0; }

    /* Cases */
    .cases { background: var(--bg); }
    .case-content { background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); padding: 46px; box-shadow: var(--shadow); }
    .case-summary { font-size: 17px; color: var(--text); margin-bottom: 32px; padding-left: 18px; border-left: 3px solid var(--accent); font-weight: 500; }
    .timeline { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 32px; position: relative; }
    .tl { position: relative; padding-left: 56px; }
    .tl::before { content: ""; position: absolute; left: 19px; top: 40px; bottom: -22px; width: 2px; background: var(--surface-2); }
    .tl:last-child::before { display: none; }
    .tl .dot { position: absolute; left: 0; top: 0; width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--brand), var(--brand-3)); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 14px; box-shadow: 0 6px 16px -6px rgba(10,37,64,.5); z-index: 1; }
    .tl h4 { font-size: 16.5px; font-weight: 800; color: var(--brand); margin-bottom: 8px; padding-top: 7px; }
    .tl p { font-size: 14.5px; color: var(--text); }

    /* News */
    .news { background: var(--surface); }
    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .news-card {
      display: flex; flex-direction: column; background: var(--bg); border: 1px solid var(--border);
      border-radius: var(--radius-sm); padding: 0 0 24px; transition: all .15s; overflow: hidden;
      text-decoration: none; color: inherit;
    }
    .news-card:hover { transform: translateY(-5px) scale(1.05); box-shadow: var(--shadow); border-color: var(--brand-3); z-index: 2; position: relative; }
    .news-thumb { display: block; width: 100%; height: 170px; object-fit: cover; object-position: top; }
    .news-inner { padding: 24px 24px 0; }
    .news-card h4 { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 12px; line-height: 1.45; }
    .news-card p { font-size: 14px; color: var(--text-2); margin: 0; }

    /* Onboarding steps - horizontal timeline */
    .steps { background: var(--bg); }
    .steps-flow { display: grid; grid-template-columns: repeat(6, 1fr); position: relative; }
    .step { position: relative; text-align: center; padding: 0 10px; }
    .step::before {
      content: ""; position: absolute; top: 27px; left: 50%; width: 100%; height: 3px;
      background: linear-gradient(90deg, var(--brand), var(--brand-3)); z-index: 0;
    }
    .step:last-child::before { display: none; }
    .step-node {
      position: relative; z-index: 1; width: 56px; height: 56px; margin: 0 auto 18px; border-radius: 50%;
      background: var(--surface); border: 2px solid var(--brand); color: var(--brand);
      display: grid; place-items: center; font-weight: 800; font-size: 18px;
      box-shadow: 0 8px 18px -8px rgba(22,119,255,.5); transition: all .2s ease;
    }
    .step:hover .step-node { background: var(--brand); color: #fff; transform: scale(1.08); }
    .step .tag {
      display: inline-block; font-size: 12px; font-weight: 800; color: var(--brand-3);
      background: rgba(22,119,255,.10); padding: 4px 12px; border-radius: 999px; margin-bottom: 10px; letter-spacing: .5px;
    }
    .step h4 { font-size: 17px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
    .step p { font-size: 13.5px; color: var(--text); line-height: 1.65; margin: 0; }

    /* Contact */
    .contact { background: var(--bg); }
    .contact-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
    .contact-box { display: flex; flex-direction: column; justify-content: center; }
    .contact-box h3 { font-size: 30px; font-weight: 800; color: var(--ink); margin-bottom: 14px; }
    .contact-box p { color: var(--text-2); margin-bottom: 28px; font-size: 16px; max-width: 440px; }
    .contact-phone { display: inline-flex; align-items: center; gap: 14px; font-size: 32px; font-weight: 800; color: var(--brand); }
    .contact-phone .ic { width: 46px; height: 46px; border-radius: 12px; background: rgba(22,119,255,.10); color: var(--brand); display: grid; place-items: center; font-size: 20px; }
    .contact-qr { display: flex; flex-direction: column; align-items: center; justify-content: center; }
    .contact-qr img { width: 200px; border-radius: 12px; margin-bottom: 16px; }
    .contact-qr span { font-size: 14.5px; color: var(--text-2); text-align: center; }

    /* Footer */
    footer { background: #eef4fb; color: var(--text-2); padding: 64px 0 30px; font-size: 14px; border-top: 1px solid var(--border); }
    footer .f-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid var(--border); }
    footer .f-brand b { color: var(--ink); font-size: 18px; font-weight: 800; display: block; margin-bottom: 12px; }
    footer .f-brand p { color: var(--text-2); max-width: 320px; }
    footer .f-col h5 { color: var(--ink); font-size: 14px; font-weight: 700; margin-bottom: 16px; }
    footer .f-col a { display: block; color: var(--text-2); padding: 6px 0; transition: color .2s; }
    footer .f-col a:hover { color: var(--brand-3); }
    footer .f-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; color: var(--muted); font-size: 13px; }

    /* Back to top */
    .to-top {
      position: fixed; right: 26px; bottom: 26px; width: 48px; height: 48px; border-radius: 14px;
      background: var(--brand); color: #fff; display: grid; place-items: center; cursor: pointer;
      box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transform: translateY(12px); transition: .3s; z-index: 90; font-size: 20px; border: none;
    }
    .to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
    .to-top:hover { background: var(--brand-3); }

    @media (max-width: 980px) {
      .section { padding: 72px 0; }
      .hero .container { grid-template-columns: 1fr; text-align: left; }
      .intro-grid { grid-template-columns: 1fr; gap: 36px; }
      .biz-detail { flex-direction: column; gap: 24px; }
      .biz-detail-img { flex: none; width: 100%; height: auto; }
      .biz-detail-body { padding: 4px 0; }
      .timeline { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .steps-flow { overflow-x: auto; grid-auto-flow: column; grid-template-columns: none; grid-auto-columns: minmax(150px, 1fr); padding-bottom: 8px; -webkit-overflow-scrolling: touch; }
      .contact-grid { grid-template-columns: 1fr; }
      footer .f-top { grid-template-columns: 1fr; gap: 28px; }
    }
    @media (max-width: 768px) {
      .subbar-nav { display: none; }
      .nav-toggle { display: flex; }
      .topbar-cta { display: none; }
      .svc-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
    }
    @media (max-width: 560px) {
      .container { padding: 0 18px; }
      .subbar { top: 35px; height: 60px; }
      .mobile-menu { top: 95px; }
      .subbar-logo { height: 26px; }
      .subbar-name { font-size: 13px; }
      .subbar-name small { font-size: 11px; }
      .hero { padding: 70px 0 86px; min-height: auto; }
      .hero h1 { font-size: 38px; }
      .intro-img { width: 100%; margin-left: 0; }
      .intro-img img { width: 100%; height: auto; }
      .section { padding: 60px 0; }
      .biz-detail-img { width: 100%; height: auto; }
      .biz-detail-body { padding: 0; }
      .biz-detail-body h3 { font-size: 1.2rem; }
      .svc-grid { grid-template-columns: 1fr; }
      .svc-card { padding: 28px 24px; }
      .steps-flow { grid-auto-columns: minmax(132px, 1fr); }
      .case-content { padding: 28px 22px; }
      .contact-phone { font-size: 26px; }
      .tab { padding: 10px 16px; font-size: 13px; }
    }