:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(37,92,164);
    --primary-soft: rgb(232,243,255);
    --ink: #122033;
    --muted: #607089;
    --line: rgba(70,139,223,.16);
    --card: rgba(255,255,255,.88);
    --shadow: 0 18px 45px rgba(28, 91, 171, .12);
    --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 10% 0%, rgba(70,139,223,.18), transparent 32rem),
        linear-gradient(180deg, #f4f9ff 0%, #ffffff 38%, #f7fbff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 36px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.84);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
}
.nav-wrap { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -.02em; }
.brand-logo { width: 38px; height: 38px; border-radius: 12px; }
.nav-toggle { display: none; }
.nav-trigger { width: 42px; height: 42px; border-radius: 14px; display: grid; place-content: center; gap: 5px; background: #fff; border: 1px solid var(--line); }
.nav-trigger span { width: 20px; height: 2px; background: var(--ink); border-radius: 999px; display: block; }
.site-nav {
    position: absolute;
    left: 18px;
    right: 18px;
    top: 76px;
    display: none;
    flex-direction: column;
    padding: 12px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}
.nav-toggle:checked ~ .site-nav { display: flex; }
.site-nav a { padding: 10px 12px; border-radius: 12px; color: var(--muted); font-size: 15px; }
.site-nav a:hover, .site-nav a.active { color: var(--primary-dark); background: var(--primary-soft); }
.hero, .page-hero { padding: 58px 0 34px; }
.hero-grid { display: grid; gap: 34px; align-items: center; }
.eyebrow { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.badge, .tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(70,139,223,.11);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 700;
}
h1 { font-size: clamp(32px, 8vw, 58px); line-height: 1.08; letter-spacing: -.05em; margin: 0 0 18px; }
h2 { font-size: clamp(24px, 5vw, 36px); line-height: 1.2; letter-spacing: -.035em; margin: 0 0 12px; }
h3 { font-size: 20px; line-height: 1.35; margin: 0 0 10px; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: 17px; color: #40536d; max-width: 680px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin: 26px 0; }
.download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 50px;
    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: 1px solid rgba(255,255,255,.2);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 16px 30px rgba(70,139,223,.32); }
.note { color: var(--muted); font-size: 14px; }
.hero-card {
    position: relative;
    padding: 18px;
    border-radius: 32px;
    background: linear-gradient(145deg, rgba(255,255,255,.92), rgba(232,243,255,.76));
    box-shadow: var(--shadow);
    border: 1px solid rgba(255,255,255,.7);
}
.hero-card::after {
    content: "";
    position: absolute;
    inset: auto 18px 16px 18px;
    height: 42px;
    border-radius: 50%;
    background: rgba(70,139,223,.18);
    filter: blur(18px);
    z-index: -1;
}
.product-frame {
    min-height: 280px;
    border-radius: 26px;
    background: linear-gradient(160deg, #ffffff 0%, #e9f4ff 100%);
    display: grid;
    place-items: center;
    overflow: hidden;
}
.product-frame img { width: min(360px, 88%); filter: drop-shadow(0 24px 34px rgba(20, 75, 140, .18)); }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 14px; }
.stat { background: rgba(255,255,255,.82); border: 1px solid var(--line); border-radius: 16px; padding: 12px; }
.stat strong { display: block; font-size: 18px; color: var(--primary-dark); }
.stat span { display: block; font-size: 12px; color: var(--muted); }
.section { padding: 42px 0; }
.section-head { margin-bottom: 24px; max-width: 760px; }
.grid, .feature-grid { display: grid; gap: 16px; }
.card {
    background: var(--card);
    border: 1px solid rgba(70,139,223,.13);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 10px 30px rgba(33, 91, 160, .07);
}
.card.soft { background: linear-gradient(145deg, #ffffff 0%, #f0f7ff 100%); }
.card .icon { width: 42px; height: 42px; border-radius: 14px; background: var(--primary-soft); color: var(--primary-dark); display: grid; place-items: center; font-weight: 900; margin-bottom: 14px; }
.split { display: grid; gap: 18px; align-items: center; }
.panel {
    background: linear-gradient(145deg, rgba(70,139,223,.13), rgba(255,255,255,.8));
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
}
.check-list, .steps, .article-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.check-list li, .steps li, .article-list li {
    background: rgba(255,255,255,.72);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 14px 16px;
    color: #40536d;
}
.steps { counter-reset: step; }
.steps li { position: relative; padding-left: 54px; }
.steps li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 14px;
    top: 14px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 800;
    line-height: 1;
}
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 18px; border-radius: 18px; background: rgba(255,255,255,.82); border: 1px solid var(--line); }
.faq-item h3 { font-size: 18px; }
.cta {
    text-align: center;
    padding: 34px 22px;
    border-radius: 30px;
    background: linear-gradient(135deg, rgba(70,139,223,.15), rgba(255,255,255,.88));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.article-body { max-width: 860px; }
.article-body p { font-size: 16px; }
.article-layout { display: grid; gap: 20px; align-items: start; }
.aside-card { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 20px; box-shadow: 0 10px 28px rgba(33,91,160,.07); }
.site-footer { margin-top: 48px; padding: 42px 0 26px; background: #0f2340; color: #dbe8f7; }
.site-footer p, .site-footer a, .footer-bottom span { color: rgba(219,232,247,.78); }
.footer-grid { display: grid; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 10px; }
.site-footer h3 { color: #fff; font-size: 16px; }
.site-footer a { display: block; padding: 5px 0; font-size: 14px; }
.footer-bottom { margin-top: 28px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); display: flex; flex-direction: column; gap: 8px; font-size: 13px; }
@media (min-width: 720px) {
    .container { width: min(1120px, calc(100% - 56px)); }
    .hero, .page-hero { padding: 76px 0 46px; }
    .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .split { grid-template-columns: 1.05fr .95fr; }
    .footer-grid { grid-template-columns: 1.5fr repeat(3, 1fr); }
    .footer-bottom { flex-direction: row; justify-content: space-between; }
}
@media (min-width: 980px) {
    .nav-trigger { display: none; }
    .site-nav { position: static; display: flex; flex-direction: row; align-items: center; padding: 0; background: transparent; border: none; box-shadow: none; }
    .site-nav a { padding: 8px 11px; }
    .hero-grid { grid-template-columns: 1.02fr .98fr; }
    .article-layout { grid-template-columns: 1fr 300px; }
    .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .section { padding: 56px 0; }
}
@media (max-width: 520px) {
    .download-btn { width: 100%; min-height: 52px; }
    .hero-actions { align-items: stretch; }
    .stats { grid-template-columns: 1fr; }
    .card, .panel { padding: 18px; }
}