:root {
    --primary: rgb(70,139,223);
    --primary-dark: #1f5fae;
    --primary-soft: #eaf4ff;
    --text: #142033;
    --muted: #60708a;
    --line: rgba(70,139,223,.16);
    --card: rgba(255,255,255,.92);
    --radius: 22px;
    --shadow: 0 14px 40px rgba(35, 91, 153, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 18% 0%, rgba(70,139,223,.18), transparent 34%),
        radial-gradient(circle at 90% 18%, rgba(70,139,223,.10), transparent 32%),
        linear-gradient(180deg, #f7fbff 0%, #eef7ff 44%, #ffffff 100%);
    min-height: 100vh;
    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: 760px;
    margin: 0 auto;
    overflow: hidden;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(247, 251, 255, .88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(70,139,223,.12);
    padding: 12px 16px 10px;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 800;
    letter-spacing: .2px;
    color: #10213a;
}
.logo img { width: 34px; height: 34px; border-radius: 12px; }
.trust-pill {
    font-size: 12px;
    color: var(--primary-dark);
    background: rgba(70,139,223,.10);
    border: 1px solid rgba(70,139,223,.16);
    padding: 5px 9px;
    border-radius: 999px;
    white-space: nowrap;
}
.mobile-nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 12px 0 0;
    scrollbar-width: none;
}
.mobile-nav::-webkit-scrollbar { display: none; }
.mobile-nav a {
    flex: 0 0 auto;
    font-size: 14px;
    color: #51617a;
    background: rgba(255,255,255,.78);
    border: 1px solid rgba(70,139,223,.12);
    padding: 7px 12px;
    border-radius: 999px;
}
.mobile-nav a.active {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
}
.site-main { padding: 18px 16px 34px; }
.banner {
    position: relative;
    padding: 26px 18px 20px;
    border-radius: 30px;
    background:
        linear-gradient(135deg, rgba(255,255,255,.96), rgba(232,245,255,.96)),
        radial-gradient(circle at 88% 4%, rgba(70,139,223,.24), transparent 36%);
    box-shadow: var(--shadow);
    border: 1px solid rgba(70,139,223,.14);
    overflow: hidden;
}
.banner::after {
    content: "";
    position: absolute;
    width: 160px;
    height: 160px;
    right: -76px;
    top: -70px;
    border-radius: 50%;
    background: rgba(70,139,223,.12);
}
.kicker, .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--primary-dark);
    background: rgba(70,139,223,.10);
    border: 1px solid rgba(70,139,223,.14);
    padding: 5px 10px;
    border-radius: 999px;
    font-weight: 700;
}
h1, h2, h3 { line-height: 1.25; margin: 0; color: #12243d; }
h1 { font-size: 30px; letter-spacing: -.8px; margin-top: 12px; }
h2 { font-size: 23px; letter-spacing: -.3px; margin-bottom: 12px; }
h3 { font-size: 17px; margin-bottom: 8px; }
p { margin: 0; color: var(--muted); }
.lead { margin-top: 12px; font-size: 16px; color: #3c4d66; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 138px;
    height: 48px;
    margin-top: 18px;
    padding: 0 22px;
    border-radius: 16px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 12px 26px rgba(70,139,223,.26);
    border: 1px solid rgba(255,255,255,.35);
}
.download-btn:active { transform: translateY(1px); }
.hero-visual {
    display: grid;
    grid-template-columns: .92fr 1.08fr;
    align-items: end;
    gap: 10px;
    margin-top: 18px;
}
.hero-tags {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.hero-tags span, .mini-tag {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    color: #255d9c;
    background: rgba(255,255,255,.86);
    border: 1px solid rgba(70,139,223,.15);
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 12px;
    box-shadow: 0 8px 22px rgba(45,93,150,.06);
}
.app-shot {
    width: 100%;
    max-width: 220px;
    justify-self: center;
    filter: drop-shadow(0 18px 28px rgba(28,80,137,.18));
}
.section {
    margin-top: 26px;
    padding: 22px 18px;
    border-radius: var(--radius);
    background: rgba(255,255,255,.78);
    border: 1px solid rgba(70,139,223,.12);
    box-shadow: 0 12px 34px rgba(35,91,153,.07);
}
.section.soft {
    background: linear-gradient(180deg, rgba(236,247,255,.95), rgba(255,255,255,.9));
}
.section-title-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}
.section-title-row .badge { margin-top: 2px; }
.card {
    padding: 16px;
    border-radius: 18px;
    background: var(--card);
    border: 1px solid var(--line);
    box-shadow: 0 10px 26px rgba(35,91,153,.06);
}
.card + .card { margin-top: 12px; }
.feature-grid {
    display: grid;
    gap: 12px;
    margin-top: 14px;
}
.feature-card {
    padding: 16px;
    border-radius: 20px;
    background: linear-gradient(180deg, #fff, #f4faff);
    border: 1px solid rgba(70,139,223,.13);
}
.feature-card .icon {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 13px;
    margin-bottom: 10px;
    color: #fff;
    background: var(--primary);
    font-weight: 900;
}
.data-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 14px;
}
.data-block {
    padding: 13px 8px;
    text-align: center;
    border-radius: 18px;
    background: rgba(70,139,223,.08);
    border: 1px solid rgba(70,139,223,.12);
}
.data-block strong { display: block; color: var(--primary-dark); font-size: 18px; }
.data-block span { font-size: 12px; color: var(--muted); }
.list {
    display: grid;
    gap: 10px;
    margin: 14px 0 0;
    padding: 0;
    list-style: none;
}
.list li {
    position: relative;
    padding-left: 24px;
    color: #41516b;
}
.list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(70,139,223,.10);
}
.steps {
    counter-reset: step;
    display: grid;
    gap: 12px;
    margin-top: 15px;
}
.step {
    counter-increment: step;
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: 12px;
    align-items: start;
}
.step::before {
    content: counter(step);
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}
.faq-item {
    padding: 16px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid rgba(70,139,223,.13);
}
.faq-item + .faq-item { margin-top: 12px; }
.faq-item h3 { font-size: 16px; }
.faq-item p { color: #57677f; }
.notice {
    margin-top: 14px;
    padding: 15px;
    border-radius: 18px;
    background: rgba(70,139,223,.08);
    border: 1px solid rgba(70,139,223,.14);
    color: #38516f;
}
.cta-panel {
    margin-top: 26px;
    padding: 24px 18px;
    border-radius: 26px;
    background: linear-gradient(135deg, rgba(70,139,223,.14), rgba(255,255,255,.95));
    border: 1px solid rgba(70,139,223,.16);
    text-align: center;
}
.cta-panel h2 { margin-bottom: 8px; }
.page-hero {
    padding: 24px 18px;
    border-radius: 28px;
    background: linear-gradient(145deg, #ffffff 0%, #eaf5ff 100%);
    border: 1px solid rgba(70,139,223,.14);
    box-shadow: var(--shadow);
}
.page-hero .download-btn { margin-top: 16px; }
.site-footer {
    margin: 8px 16px 24px;
    padding: 22px 18px;
    border-radius: 24px;
    background: rgba(255,255,255,.82);
    border: 1px solid rgba(70,139,223,.12);
}
.footer-brand {
    display: flex;
    gap: 12px;
    align-items: center;
}
.footer-brand img { width: 42px; height: 42px; border-radius: 14px; }
.footer-brand strong { display: block; color: #13243b; }
.footer-brand p { font-size: 13px; }
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}
.footer-links a {
    font-size: 13px;
    color: #38506e;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(70,139,223,.08);
}
.footer-risk {
    margin-top: 14px;
    font-size: 12px;
    color: #6a788e;
}
.copyright { margin-top: 10px; font-size: 12px; color: #8a97aa; }
.desktop-gate {
    position: fixed;
    inset: 0;
    z-index: 999;
    display: grid;
    place-items: center;
    padding: 24px;
    background: rgba(245,250,255,.96);
    backdrop-filter: blur(16px);
}
.desktop-gate-card {
    width: min(420px, 92vw);
    padding: 30px 24px;
    text-align: center;
    background: #fff;
    border-radius: 28px;
    border: 1px solid rgba(70,139,223,.16);
    box-shadow: var(--shadow);
}
.desktop-gate-logo { width: 58px; height: 58px; margin: 0 auto 14px; border-radius: 18px; }
.desktop-gate h1 { font-size: 26px; margin: 0 0 10px; }
.desktop-gate-note { margin-top: 10px; font-size: 13px; color: #7a8799; }
.desktop-visitor { overflow: hidden; }
.desktop-visitor .download-btn { display: none !important; }
.desktop-visitor .site-shell { max-height: 100vh; overflow: hidden; }
@media (min-width: 540px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .site-main { padding-left: 22px; padding-right: 22px; }
    .banner { padding: 32px 26px 26px; }
}