:root {
      --ink: #07142c;
      --gold: #e7bf69;
      --gold-2: #f7dfa0;
      --paper: #050d1e;
      --muted: #8b9bb8;
      --radius: 28px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: #f1f5f9;
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.85;
    }
    a { color: inherit; }
    .topbar {
      position: sticky; top: 0; z-index: 20;
      background: rgba(7, 20, 44, .92);
      border-bottom: 1px solid rgba(255,255,255,.1);
      backdrop-filter: blur(18px);
    }
    .nav {
      max-width: 1180px; margin: 0 auto; padding: 14px 22px;
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
    }
    .brand { display: flex; align-items: center; gap: 12px; color: #fff; text-decoration: none; font-weight: 800; letter-spacing: .04em; }
    .brand-mark { width: 36px; height: 36px; border-radius: 12px; display: grid; place-items: center; color: #111c33; font-weight: 900; background: linear-gradient(140deg, var(--gold-2), var(--gold)); box-shadow: 0 8px 24px rgba(231,191,105,.22); }
    .nav-links { display: flex; gap: 22px; font-size: 14px; color: rgba(255,255,255,.78); }
    .nav-links a { text-decoration: none; }
    .nav-links a:hover { color: var(--gold-2); }
    .nav-cta { color: #111c33; text-decoration: none; background: linear-gradient(135deg, var(--gold-2), var(--gold)); padding: 9px 15px; border-radius: 12px; font-weight: 800; font-size: 14px; white-space: nowrap; }
    .hero { position: relative; min-height: 610px; overflow: hidden; color: #fff; background: var(--ink); }
    .hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,20,44,.5) 0%, rgba(7,20,44,.82) 80%, #050d1e 100%), url('/LOGO/sg1.png') center/cover; }
    .hero-inner { position: relative; max-width: 1180px; margin: 0 auto; padding: 110px 22px 120px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--gold-2); border: 1px solid rgba(247,223,160,.32); background: rgba(247,223,160,.08); padding: 6px 12px; border-radius: 999px; font-size: 13px; letter-spacing: .05em; }
    h1 { max-width: 730px; margin: 26px 0 20px; font-size: clamp(38px, 6vw, 72px); line-height: 1.18; letter-spacing: -.04em; }
    .hero p { max-width: 680px; color: rgba(255,255,255,.78); font-size: 18px; margin: 0 0 30px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .button { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; border-radius: 14px; padding: 12px 18px; font-weight: 800; transition: transform .2s, box-shadow .2s, background .2s; }
    .button:hover { transform: translateY(-2px); }
    .button-primary { color: #111c33; background: linear-gradient(135deg, var(--gold-2), var(--gold)); box-shadow: 0 12px 30px rgba(231,191,105,.22); }
    .button-ghost { color: #fff; border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.08); }
    .trust-strip { position: relative; max-width: 1180px; margin: -42px auto 0; padding: 0 22px; z-index: 2; }
    .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: rgba(12, 29, 61, 0.88); border: 1px solid rgba(255,255,255,.12); box-shadow: 0 24px 70px rgba(0,0,0,.4); backdrop-filter: blur(16px); border-radius: 20px; overflow: hidden; }
    .trust-item { padding: 20px 22px; border-right: 1px solid rgba(255,255,255,.08); }
    .trust-item:last-child { border-right: 0; }
    .trust-item strong { display: block; color: #fff; font-size: 19px; }
    .trust-item span { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }
    .container { max-width: 1040px; margin: 0 auto; padding: 74px 22px; }
    .section-intro { max-width: 740px; margin-bottom: 32px; }
    .kicker { color: var(--gold); font-weight: 800; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }
    h2 { color: #fff; font-size: clamp(28px, 4vw, 42px); line-height: 1.25; margin: 8px 0 14px; letter-spacing: -.025em; }
    h3 { color: #fff; font-size: 22px; line-height: 1.4; margin: 0 0 10px; }
    .lead { color: #9bb0d1; font-size: 18px; }
    .copy p { margin: 0 0 18px; color: #cbd5e1; }
    .copy p:last-child { margin-bottom: 0; }

    /* 大图作为背景卡片，文字层叠在上面 */
    .hero-bg-card {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid rgba(255,255,255,.14);
      box-shadow: 0 30px 80px rgba(0,0,0,.5);
      margin: 36px 0;
      background-size: cover;
      background-position: center;
    }
    .hero-bg-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(7,20,44,.93) 0%, rgba(7,20,44,.82) 55%, rgba(7,20,44,.7) 100%);
      backdrop-filter: blur(4px);
    }
    .hero-bg-content {
      position: relative;
      z-index: 2;
      padding: 56px 48px;
    }
    .hero-bg-card.img-1 { background-image: url('/LOGO/sg1.png'); }
    .hero-bg-card.img-2 { background-image: url('/LOGO/sg2.png'); }
    .hero-bg-card.img-3 { background-image: url('/LOGO/sg3.png'); }
    .hero-bg-card.img-4 { background-image: url('/LOGO/sg4.png'); }

    .split { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 28px; }
    .card { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: 20px; padding: 28px; backdrop-filter: blur(12px); }
    .card p { color: #cbd5e1; margin: 0; }
    .icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 15px; margin-bottom: 15px; color: #111c33; background: linear-gradient(135deg, var(--gold-2), var(--gold)); font-size: 21px; font-weight: 800; }
    .process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; counter-reset: step; margin-top: 28px; }
    .process-card { position: relative; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); padding: 24px 20px; border-radius: 18px; backdrop-filter: blur(12px); }
    .process-card::before { counter-increment: step; content: counter(step, decimal-leading-zero); color: var(--gold); font-size: 32px; font-weight: 900; opacity: .7; }
    .process-card p { color: #cbd5e1; font-size: 14px; margin: 0; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 22px 0 0; list-style: none; }
    .tag-list li { border: 1px solid rgba(231,191,105,.32); background: rgba(231,191,105,.09); color: var(--gold-2); padding: 7px 12px; border-radius: 999px; font-size: 13px; }
    .agent-box { background: linear-gradient(135deg, #161138, #091736); color: #fff; padding: 42px; border-radius: var(--radius); border: 1px solid rgba(231,191,105,.3); box-shadow: 0 20px 60px rgba(0,0,0,.4); }
    .agent-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 25px; }
    .agent-point { padding: 20px; border: 1px solid rgba(255,255,255,.14); background: rgba(255,255,255,.06); border-radius: 16px; }
    .agent-point strong { display: block; color: var(--gold-2); margin-bottom: 6px; }
    .agent-point span { color: rgba(255,255,255,.7); font-size: 14px; }
    .faq { border-top: 1px solid rgba(255,255,255,.1); }
    details { border-bottom: 1px solid rgba(255,255,255,.1); padding: 18px 0; }
    summary { cursor: pointer; color: #fff; font-weight: 800; }
    details p { color: #cbd5e1; margin: 12px 0 0; }
    .footer { background: #030814; color: rgba(255,255,255,.62); padding: 46px 22px 90px; text-align: center; font-size: 13px; border-top: 1px solid rgba(255,255,255,.08); }
    .footer a { color: var(--gold-2); }
    .float-agent { position: fixed; right: 18px; bottom: 18px; z-index: 30; width: min(360px, calc(100vw - 36px)); border: 1px solid rgba(231,191,105,.46); border-radius: 18px; padding: 14px; color: #fff; background: rgba(7,20,44,.93); box-shadow: 0 18px 45px rgba(0,0,0,.4); backdrop-filter: blur(16px); }
    .float-agent-inner { display: flex; align-items: center; gap: 11px; }
    .float-mark { width: 42px; height: 42px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 13px; color: #121c31; font-weight: 900; background: linear-gradient(135deg, var(--gold-2), var(--gold)); }
    .float-copy { min-width: 0; flex: 1; }
    .float-copy strong { display: block; font-size: 14px; }
    .float-copy span { display: block; color: #f1d88f; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .float-agent a { display: inline-flex; color: #121c31; background: var(--gold-2); text-decoration: none; font-size: 12px; font-weight: 900; border-radius: 10px; padding: 8px 10px; white-space: nowrap; }
    .float-close { border: 0; background: transparent; color: rgba(255,255,255,.65); cursor: pointer; font-size: 18px; padding: 2px 3px; }
    @media (max-width: 820px) {
      .nav-links { display: none; }
      .hero-inner { padding-top: 80px; }
      .trust-grid, .split, .agent-grid { grid-template-columns: 1fr 1fr; }
      .trust-item:nth-child(2) { border-right: 0; }
      .trust-item:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.08); }
      .process { grid-template-columns: 1fr 1fr; }
      .hero-bg-content { padding: 36px 24px; }
    }
    @media (max-width: 520px) {
      .brand span { font-size: 14px; }
      .nav-cta { padding: 8px 10px; font-size: 12px; }
      .trust-grid, .split, .agent-grid, .process { grid-template-columns: 1fr; }
      .trust-item { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.08); }
      .trust-item:last-child { border-bottom: 0; }
      .hero p { font-size: 16px; }
      .container { padding-top: 54px; padding-bottom: 54px; }
      .hero-bg-content { padding: 26px 20px; }
    }