:root {
    --primary: rgb(70,139,223);
    --primary-dark: #1f5fba;
    --primary-soft: #e9f3ff;
    --ink: #122033;
    --muted: #5d6b7e;
    --line: rgba(70,139,223,.16);
    --white: #ffffff;
    --bg: #f4f9ff;
    --shadow: 0 16px 38px rgba(31, 95, 186, .12);
    --radius: 22px;
}
* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
    margin: 0;
    min-height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 0%, rgba(70,139,223,.22), transparent 34%),
        linear-gradient(180deg, #f0f7ff 0%, #ffffff 44%, #f7fbff 100%);
    line-height: 1.75;
    font-size: 16px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-shell { width: 100%; max-width: 520px; margin: 0 auto; min-height: 100vh; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    padding: 12px 16px 10px;
    background: rgba(246,250,255,.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(70,139,223,.1);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .02em; color: #13345f; }
.logo { width: 34px; height: 34px; border-radius: 10px; object-fit: contain; }
.mobile-nav { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 12px; }
.mobile-nav a {
    text-align: center;
    padding: 8px 6px;
    border-radius: 999px;
    font-size: 13px;
    color: #496073;
    background: rgba(255,255,255,.72);
    border: 1px solid rgba(70,139,223,.08);
}
.mobile-nav a.active { color: var(--primary-dark); background: var(--primary-soft); font-weight: 700; }
.page-main { padding: 18px 16px 34px; }
.banner {
    position: relative;
    overflow: hidden;
    border-radius: 28px;
    padding: 24px 20px;
    background: linear-gradient(145deg, #ffffff 0%, #eaf4ff 54%, #dceeff 100%);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255,255,255,.85);
}
.banner:after {
    content: "";
    position: absolute;
    width: 210px;
    height: 210px;
    right: -82px;
    top: -70px;
    background: radial-gradient(circle, rgba(70,139,223,.28), transparent 66%);
}
.banner-content { position: relative; z-index: 2; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.badge, .mini-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 999px;
    padding: 6px 10px;
    color: var(--primary-dark);
    background: rgba(255,255,255,.86);
    border: 1px solid rgba(70,139,223,.18);
    font-size: 12px;
    font-weight: 700;
}
h1, h2, h3 { margin: 0; line-height: 1.25; color: #102744; }
h1 { font-size: 28px; letter-spacing: -0.04em; }
h2 { font-size: 22px; margin-bottom: 14px; }
h3 { font-size: 17px; margin-bottom: 8px; }
p { margin: 0 0 12px; color: var(--muted); }
.hero-text { margin-top: 12px; font-size: 15px; color: #40556b; }
.app-visual { margin-top: 22px; display: grid; grid-template-columns: 1fr .75fr; gap: 14px; align-items: end; }
.app-card { padding: 12px; border-radius: 24px; background: rgba(255,255,255,.86); box-shadow: 0 12px 30px rgba(70,139,223,.12); }
.app-card img { border-radius: 20px; }
.stat-stack { display: grid; gap: 10px; }
.stat { padding: 12px; border-radius: 18px; background: rgba(255,255,255,.72); border: 1px solid rgba(70,139,223,.12); }
.stat strong { display: block; color: var(--primary-dark); font-size: 18px; }
.stat span { display: block; color: var(--muted); font-size: 12px; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 12px 26px rgba(70,139,223,.28);
    border: none;
    cursor: pointer;
    letter-spacing: .02em;
}
.download-btn:active { transform: translateY(1px); }
.section { margin-top: 24px; }
.section.lead-section { margin-top: 18px; }
.card {
    border-radius: var(--radius);
    padding: 18px;
    background: rgba(255,255,255,.9);
    border: 1px solid rgba(70,139,223,.12);
    box-shadow: 0 10px 28px rgba(31,95,186,.08);
    margin-bottom: 14px;
}
.soft-card { background: linear-gradient(180deg, #ffffff, #eef7ff); }
.feature-grid { display: grid; gap: 12px; }
.feature-card { padding: 16px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.icon-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); display: inline-block; margin-right: 7px; }
.info-list { padding: 0; margin: 0; list-style: none; display: grid; gap: 10px; }
.info-list li { padding: 12px 14px; border-radius: 16px; background: var(--primary-soft); color: #2e4a66; }
.steps { counter-reset: step; display: grid; gap: 12px; }
.step { position: relative; padding: 16px 16px 16px 54px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.step:before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 16px;
    top: 16px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 800;
    font-size: 13px;
}
.faq-item { border-radius: 20px; background: #fff; border: 1px solid var(--line); padding: 16px; margin-bottom: 12px; }
.faq-item h2, .faq-item h3 { font-size: 16px; margin-bottom: 8px; }
.cta-panel {
    margin-top: 24px;
    padding: 22px 18px;
    border-radius: 26px;
    background: linear-gradient(135deg, var(--primary), #79b4f4);
    color: #fff;
    box-shadow: var(--shadow);
}
.cta-panel h2, .cta-panel p { color: #fff; }
.cta-panel .download-btn { background: #fff; color: var(--primary-dark); box-shadow: none; margin-top: 6px; }
.site-footer { padding: 24px 16px 34px; background: #f7fbff; border-top: 1px solid rgba(70,139,223,.1); }
.footer-brand { display: flex; gap: 12px; align-items: center; }
.footer-logo { width: 36px; height: 36px; border-radius: 12px; }
.footer-brand p, .footer-note { font-size: 13px; margin: 2px 0 0; }
.footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 18px 0; }
.footer-links a { padding: 10px 12px; border-radius: 15px; background: #fff; color: #41617c; border: 1px solid var(--line); font-size: 13px; }
.desktop-gate { display: none; }
.desktop-client .desktop-gate {
    display: grid;
    position: fixed;
    inset: 0;
    z-index: 1000;
    place-items: center;
    padding: 24px;
    background: linear-gradient(180deg, #eff7ff 0%, #ffffff 100%);
}
.desktop-client .gate-card { width: min(420px, 94vw); padding: 32px; border-radius: 26px; background: #fff; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--line); }
.desktop-client .gate-logo { width: 56px; height: 56px; margin: 0 auto 18px; border-radius: 16px; }
.desktop-client .site-shell { height: 100vh; overflow: hidden; opacity: .04; pointer-events: none; }
.desktop-client .download-btn { display: none !important; }
@media (min-width: 700px) {
    .site-shell { max-width: 540px; }
}