:root{
    --primary: rgb(70,139,223);
    --primary-dark: #1f5fae;
    --primary-soft: #eaf3ff;
    --text: #13233a;
    --muted: #607086;
    --line: rgba(70,139,223,.18);
    --card: rgba(255,255,255,.92);
    --shadow: 0 16px 40px rgba(34, 87, 151, .10);
    --radius: 22px;
}
*{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 8% 0%, rgba(70,139,223,.18), transparent 26%),
        radial-gradient(circle at 92% 12%, rgba(116,184,255,.20), transparent 30%),
        linear-gradient(180deg,#f7fbff 0%,#eef6ff 42%,#ffffff 100%);
    line-height:1.72;
    font-size:16px;
    min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{
    position:sticky;
    top:0;
    z-index:20;
    padding:10px 14px 8px;
    background:rgba(247,251,255,.86);
    backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(70,139,223,.10);
}
.header-inner{
    max-width:760px;
    margin:0 auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;color:#0d2b4f;letter-spacing:.2px;white-space:nowrap}
.logo{width:34px;height:34px;border-radius:12px;box-shadow:0 8px 18px rgba(70,139,223,.20)}
.mobile-nav{display:flex;align-items:center;gap:6px;overflow:auto;padding:2px 0;scrollbar-width:none}
.mobile-nav::-webkit-scrollbar{display:none}
.mobile-nav a{font-size:13px;color:#40536d;padding:7px 9px;border-radius:999px;background:rgba(255,255,255,.66);border:1px solid rgba(70,139,223,.10);white-space:nowrap}
.site-main{max-width:760px;margin:0 auto;padding:16px 14px 26px}
.banner{
    position:relative;
    overflow:hidden;
    padding:24px 18px;
    border:1px solid rgba(70,139,223,.18);
    border-radius:28px;
    background:linear-gradient(145deg,rgba(255,255,255,.94),rgba(230,243,255,.84));
    box-shadow:var(--shadow);
}
.banner:before{content:"";position:absolute;right:-45px;top:-45px;width:160px;height:160px;border-radius:50%;background:rgba(70,139,223,.12)}
.banner h1,.page-hero h1{margin:0 0 12px;font-size:30px;line-height:1.2;letter-spacing:-.6px;color:#102744}
.banner p,.page-hero p{margin:0;color:var(--muted)}
.hero-copy{position:relative;z-index:1}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.badge{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(70,139,223,.18);background:#fff;color:#275e9e;padding:7px 10px;border-radius:999px;font-size:12px;font-weight:700}
.download-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-width:142px;
    height:46px;
    margin-top:8px;
    padding:0 24px;
    border-radius:999px;
    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,.55);
}
.download-btn:active{transform:translateY(1px)}
.hero-device{position:relative;z-index:1;margin:22px auto 0;max-width:245px;padding:12px;border-radius:30px;background:linear-gradient(180deg,#fff,#eef7ff);box-shadow:inset 0 0 0 1px rgba(70,139,223,.12),0 18px 36px rgba(21,76,139,.12)}
.hero-device img{border-radius:24px}
.section{margin-top:22px}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:12px}
.section h2,.section-title h2{margin:0;font-size:22px;line-height:1.3;color:#132d4d;letter-spacing:-.2px}
.section-sub{margin:6px 0 0;color:var(--muted);font-size:14px}
.card{
    background:var(--card);
    border:1px solid rgba(70,139,223,.14);
    border-radius:var(--radius);
    padding:18px;
    box-shadow:var(--shadow);
}
.card + .card{margin-top:12px}
.card h2,.card h3{margin:0 0 8px;color:#173252;line-height:1.32}
.card p{margin:8px 0 0;color:#53657c}
.card ul,.card ol{margin:10px 0 0;padding-left:20px;color:#53657c}
.card li+li{margin-top:6px}
.feature-grid{display:grid;grid-template-columns:1fr;gap:12px}
.feature-card{background:#fff;border:1px solid rgba(70,139,223,.13);border-radius:20px;padding:16px;box-shadow:0 12px 28px rgba(42,91,151,.07)}
.feature-card strong{display:block;margin-bottom:6px;color:#14365f;font-size:16px}
.feature-card p{margin:0;color:#61728a;font-size:14px}
.data-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.data-block{padding:14px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#eef6ff);border:1px solid rgba(70,139,223,.13)}
.data-block strong{display:block;color:var(--primary-dark);font-size:20px;line-height:1.1}.data-block span{font-size:12px;color:#61728a}
.info-note{margin-top:14px;padding:14px;border-radius:18px;background:var(--primary-soft);border:1px solid rgba(70,139,223,.14);color:#345777;font-size:14px}
.faq-item{background:#fff;border:1px solid rgba(70,139,223,.14);border-radius:20px;padding:16px;box-shadow:0 10px 24px rgba(42,91,151,.06)}
.faq-item + .faq-item{margin-top:12px}.faq-item h2,.faq-item h3{margin:0 0 8px;font-size:17px;color:#14365f}.faq-item p{margin:0;color:#607086}
.page-hero{padding:22px 18px;border-radius:28px;background:linear-gradient(145deg,rgba(255,255,255,.95),rgba(232,244,255,.88));border:1px solid rgba(70,139,223,.18);box-shadow:var(--shadow)}
.topic-list{display:grid;gap:10px}.topic-list a{display:flex;justify-content:space-between;gap:12px;padding:14px 15px;border-radius:18px;background:#fff;border:1px solid rgba(70,139,223,.13);box-shadow:0 10px 22px rgba(42,91,151,.05);color:#15375f;font-weight:700}.topic-list a span{color:var(--muted);font-weight:500;font-size:13px}
.download-panel{text-align:center;background:linear-gradient(145deg,#fff,#edf6ff);border:1px solid rgba(70,139,223,.18);border-radius:26px;padding:22px 18px;box-shadow:var(--shadow)}
.steps{counter-reset:step;display:grid;gap:12px}.step{position:relative;padding:15px 15px 15px 48px;background:#fff;border:1px solid rgba(70,139,223,.13);border-radius:19px;box-shadow:0 10px 22px rgba(42,91,151,.05)}.step:before{counter-increment:step;content:counter(step);position:absolute;left:14px;top:15px;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;font-size:13px;font-weight:800}.step strong{display:block;color:#14365f}.step p{margin:4px 0 0;color:#66778c;font-size:14px}
.site-footer{max-width:760px;margin:0 auto;padding:0 14px 24px}.footer-card{background:#102744;color:#dcecff;border-radius:24px;padding:20px;box-shadow:0 18px 40px rgba(16,39,68,.16)}.footer-brand{display:flex;gap:12px;align-items:center}.footer-logo{width:38px;height:38px;border-radius:14px}.footer-brand p,.footer-note,.copyright{margin:4px 0 0;color:#aebed3;font-size:13px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:16px 0}.footer-links a{padding:10px 12px;border-radius:14px;background:rgba(255,255,255,.07);color:#eef6ff;font-size:13px}.copyright{margin-top:12px}
.desktop-notice{display:none}
.desktop-limited .desktop-notice{display:flex;position:fixed;inset:0;z-index:1000;align-items:center;justify-content:center;padding:24px;background:linear-gradient(180deg,#eef6ff,#fff)}
.desktop-limited .desktop-notice-card{max-width:420px;text-align:center;background:#fff;border:1px solid rgba(70,139,223,.16);border-radius:28px;padding:30px;box-shadow:var(--shadow)}
.notice-logo{width:58px;height:58px;margin:0 auto 14px;border-radius:18px}.desktop-limited .download-btn{display:none}.desktop-limited .site-header,.desktop-limited .site-main,.desktop-limited .site-footer{opacity:.02;pointer-events:none;user-select:none}
@media (min-width:640px){.feature-grid{grid-template-columns:1fr 1fr}.banner{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:18px}.hero-device{margin:0}.footer-links{grid-template-columns:repeat(3,1fr)}}