:root {
  --bg: #F5F7FF;
  --ink: #1F2740;
  --muted: #66708A;
  --soft: #9AA4BA;
  --title: #131A35;
  --brand: #5B6CFF;
  --brand-2: #7A5CFF;
  --cyan: #00D4FF;
  --gold: #FFC857;
  --navy: #16213E;
  --card: #FFFFFF;
  --line: rgba(91,108,255,0.18);
  --shadow: 0 20px 46px rgba(25,43,91,0.14);
  --gradient: linear-gradient(135deg, #5B6CFF 0%, #7A5CFF 48%, #00D4FF 100%);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.75; overflow-x: hidden; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-2); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
.site-header { position: sticky; top: 0; width: 100%; z-index: 9999; background: rgba(12,18,40,0.94); backdrop-filter: blur(12px); box-shadow: 0 8px 26px rgba(25,43,91,0.16); }
.header-inner { width: min(1280px, calc(100% - 40px)); min-height: 72px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.site-logo { display: inline-flex; align-items: center; gap: 10px; color: #fff; white-space: nowrap; }
.site-logo img { width: 42px; height: 42px; object-fit: contain; border-radius: 12px; }
.site-logo strong { font-size: 19px; letter-spacing: .03em; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 8px; flex: 1; }
.nav-core a { color: #EEF2FF; border-radius: 999px; padding: 8px 12px; font-size: 15px; }
.nav-core a:hover, .nav-core a.active { color: #fff; background: rgba(0,212,255,0.16); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; color: #fff; background: var(--gradient); border-radius: 999px; box-shadow: 0 14px 32px rgba(91,108,255,0.22); font-weight: 700; transition: transform .25s ease, box-shadow .25s ease; }
.main-btn:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 18px 36px rgba(91,108,255,0.3); }
.main-btn.compact { min-height: 42px; padding: 0 18px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; }
.menu-toggle { width: 42px; height: 42px; border: 0; border-radius: 50%; background: rgba(255,255,255,.1); display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; cursor: pointer; }
.menu-toggle span { width: 17px; height: 2px; border-radius: 3px; background: #fff; }
.menu-toggle-mobile { display: none; }
.site-drawer { position: fixed; top: 0; right: 0; width: min(390px, 88vw); height: 100dvh; padding: 24px; background: #fff; z-index: 10002; transform: translateX(105%); transition: transform .3s ease; overflow-y: auto; box-shadow: -24px 0 60px rgba(11,16,36,.22); }
.drawer-overlay { position: fixed; inset: 0; z-index: 10001; background: rgba(5,8,20,.52); opacity: 0; visibility: hidden; transition: .3s ease; }
.drawer-open { overflow: hidden; }
.drawer-open .site-drawer { transform: translateX(0); }
.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; }
.drawer-head .site-logo { color: var(--title); }
.drawer-close { border: 0; background: #EEF1FF; width: 42px; height: 42px; border-radius: 50%; cursor: pointer; color: var(--title); font-size: 30px; line-height: 1; }
.drawer-intro { color: var(--muted); margin: 20px 0; }
.drawer-nav { display: grid; gap: 8px; }
.drawer-nav a { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-radius: 14px; color: var(--ink); background: #F7F8FF; }
.drawer-nav a:hover { color: var(--brand); background: #EEF0FF; }
.drawer-note { margin-top: 18px; padding: 16px; border-radius: 16px; background: #FFF7E2; color: #735B20; font-size: 14px; }
main { min-height: 60vh; }
.container { width: min(1200px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 84px 0; }
.section-tight { padding: 56px 0; }
.section.alt { background: linear-gradient(180deg, rgba(234,247,255,.66), rgba(245,247,255,.28)); }
.section.deep { background: linear-gradient(135deg, #11182F, #16213E); color: #EEF2FF; }
.section.deep h2, .section.deep h3 { color: #fff; }
.section-kicker { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 10px; color: var(--brand); font-weight: 800; letter-spacing: .08em; font-size: 13px; text-transform: uppercase; }
.section-kicker:before { content: ""; width: 28px; height: 2px; background: var(--gradient); border-radius: 3px; }
h1, h2, h3, .section-title { margin: 0; color: var(--title); line-height: 1.24; }
h1 { font-size: clamp(42px, 6vw, 78px); letter-spacing: -.04em; }
h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.025em; }
h3 { font-size: 21px; }
p { margin: 0 0 1em; }
.lead { font-size: 18px; color: var(--muted); }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head p { color: var(--muted); margin-top: 14px; }
.hero { position: relative; isolation: isolate; overflow: hidden; padding: 84px 0 70px; background: radial-gradient(circle at 10% 15%, rgba(122,92,255,.20), transparent 34%), radial-gradient(circle at 90% 20%, rgba(0,212,255,.18), transparent 32%), linear-gradient(135deg, #F8F4FF, #EEF8FF 55%, #FFF4FA); }
.hero:before, .hero:after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); z-index: -1; }
.hero:before { width: 420px; height: 420px; background: rgba(91,108,255,.1); left: -180px; bottom: -180px; }
.hero:after { width: 280px; height: 280px; background: rgba(255,200,87,.16); right: -90px; top: 70px; }
.hero-grid { display: grid; grid-template-columns: 1.03fr .97fr; align-items: center; gap: 56px; }
.hero-copy .eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 999px; background: rgba(255,255,255,.72); border: 1px solid var(--line); color: var(--brand); font-weight: 700; font-size: 14px; }
.hero-copy h1 { margin-top: 18px; }
.hero-subtitle { font-size: clamp(24px, 3vw, 38px); font-weight: 800; margin: 12px 0 16px; color: var(--navy); }
.hero-copy .lead { max-width: 690px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 28px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.hero-points span { padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,.74); border: 1px solid var(--line); color: var(--title); font-size: 14px; }
.hero-visual { position: relative; }
.hero-visual:before { content: ""; position: absolute; inset: 9% 5% -3% 10%; border-radius: 36px; background: var(--gradient); filter: blur(30px); opacity: .2; }
.hero-visual img { position: relative; width: 100%; max-height: 600px; object-fit: contain; filter: drop-shadow(0 34px 42px rgba(25,43,91,.22)); }
.highlight-strip { margin-top: -24px; position: relative; z-index: 3; }
.highlight-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 18px; background: rgba(255,255,255,.88); backdrop-filter: blur(14px); border: 1px solid rgba(255,255,255,.88); box-shadow: var(--shadow); border-radius: 26px; }
.highlight-item { padding: 18px; border-radius: 18px; background: linear-gradient(180deg, #fff, #F8F9FF); }
.highlight-item b { display: block; color: var(--title); margin-bottom: 5px; }
.highlight-item p { margin: 0; color: var(--muted); font-size: 14px; }
.channel-pills { display: flex; flex-wrap: wrap; gap: 12px; }
.channel-pill { flex: 1 1 210px; min-height: 126px; padding: 18px; border-radius: 20px; background: #fff; border: 1px solid var(--line); box-shadow: 0 12px 28px rgba(25,43,91,.08); }
.channel-pill strong { display: block; color: var(--title); margin-bottom: 6px; }
.channel-pill p { color: var(--muted); font-size: 14px; margin-bottom: 8px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; }
.split.reverse .media { order: 2; }
.media img { width: 100%; max-height: 540px; object-fit: contain; border-radius: 28px; box-shadow: var(--shadow); background: #fff; }
.copy-block p { color: var(--muted); }
.copy-block .main-btn { margin-top: 10px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card-grid.two { grid-template-columns: repeat(2, 1fr); }
.card, .zone-card, .info-card, .review-card { background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 22px; overflow: hidden; }
.card-body, .zone-card .body, .info-card, .review-card { padding: 26px; }
.card img, .zone-card img { width: 100%; height: 240px; object-fit: contain; background: linear-gradient(135deg, #EFF8FF, #F9F2FF); }
.card p, .zone-card p, .info-card p, .review-card p { color: var(--muted); }
.feature-list { display: grid; gap: 12px; margin: 18px 0; padding: 0; list-style: none; }
.feature-list li { position: relative; padding-left: 24px; color: var(--ink); }
.feature-list li:before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--brand); font-weight: 900; }
.triple-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.security-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.security-card { padding: 28px; border-radius: 24px; background: rgba(255,255,255,.96); color: var(--ink); display: grid; grid-template-columns: 160px 1fr; gap: 22px; align-items: center; }
.security-card img { width: 160px; height: 160px; object-fit: contain; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.review-card .review-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; color: var(--soft); font-size: 13px; }
.review-card .stars { color: var(--gold); letter-spacing: 2px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 20px 22px; }
.faq-item h3 { font-size: 18px; margin-bottom: 8px; }
.faq-item p { color: var(--muted); margin: 0; }
.notice { padding: 28px; border-radius: 24px; background: linear-gradient(135deg, #FFF7E2, #F7F3FF); border: 1px solid rgba(255,200,87,.4); }
.notice h2 { font-size: 28px; }
.notice p { color: #5F5B6E; margin-top: 12px; }
.inner-hero { padding: 72px 0 52px; background: radial-gradient(circle at 12% 20%, rgba(91,108,255,.17), transparent 28%), radial-gradient(circle at 82% 16%, rgba(0,212,255,.14), transparent 26%), linear-gradient(135deg, #F9F5FF, #EEF8FF); }
.inner-hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 48px; }
.inner-hero h1 { font-size: clamp(38px, 5vw, 62px); }
.inner-hero .lead { margin-top: 16px; }
.inner-hero img { width: 100%; max-height: 420px; object-fit: contain; border-radius: 28px; filter: drop-shadow(0 26px 38px rgba(25,43,91,.18)); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; color: var(--soft); font-size: 14px; margin-bottom: 12px; }
.breadcrumb a { color: var(--muted); }
.prose { max-width: 860px; }
.prose p { color: var(--muted); font-size: 17px; }
.prose h2 { font-size: 34px; margin: 36px 0 14px; }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.service-item { padding: 24px; border-radius: 20px; background: #fff; border: 1px solid var(--line); box-shadow: 0 12px 30px rgba(25,43,91,.08); }
.service-item .num { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 12px; background: #EEF0FF; color: var(--brand); font-weight: 800; margin-bottom: 12px; }
.service-item p { color: var(--muted); margin: 8px 0 0; }
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { position: relative; padding: 22px 22px 22px 76px; border-radius: 18px; background: #fff; border: 1px solid var(--line); }
.step:before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 20px; width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; color: #fff; background: var(--gradient); font-weight: 800; }
.step p { color: var(--muted); margin: 5px 0 0; }
.quote { padding: 30px; border-radius: 24px; background: linear-gradient(135deg, #11182F, #1D2B55); color: #EEF2FF; }
.quote p { font-size: 19px; margin: 0; }
.quote footer { margin-top: 14px; color: #AFC1F1; }
.site-footer { background: #0B1024; color: #EEF2FF; padding: 62px 0 24px; }
.footer-inner { width: min(1200px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 34px; }
.footer-brand p { color: #AAB4D2; max-width: 460px; margin-top: 18px; }
.footer-links { display: grid; align-content: start; gap: 9px; }
.footer-links h3 { color: #fff; font-size: 16px; margin-bottom: 8px; }
.footer-links a { color: #BFC8E5; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { width: min(1200px, calc(100% - 40px)); margin: 38px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); display: flex; justify-content: space-between; gap: 20px; color: #8793B9; font-size: 13px; }
.mobile-quick-nav { display: none; }
@media (max-width: 1024px) {
  .nav-core { display: none; }
  .menu-toggle-mobile { display: inline-flex; }
  .menu-toggle-desktop { display: none; }
  .header-inner { width: min(100% - 24px, 980px); }
  .site-logo { flex: 1; justify-content: center; }
  .header-actions { flex: 1; justify-content: flex-end; }
  .menu-toggle-mobile { flex: 0 0 42px; }
  .header-actions .main-btn { min-height: 40px; padding: 0 14px; font-size: 14px; }
  .hero-grid, .inner-hero-grid, .split { grid-template-columns: 1fr; }
  .hero-copy { text-align: center; }
  .hero-copy .lead { margin-inline: auto; }
  .hero-actions, .hero-points { justify-content: center; }
  .hero-visual, .inner-hero img { max-width: 720px; margin: 0 auto; }
  .highlight-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
  .triple-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .security-wrap { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1.5fr repeat(3, 1fr); }
}
@media (max-width: 720px) {
  body { padding-bottom: 72px; }
  .header-inner { min-height: 64px; }
  .site-logo img { width: 36px; height: 36px; }
  .site-logo strong { font-size: 17px; }
  .header-actions .main-btn { padding: 0 12px; }
  .container { width: min(100% - 28px, 680px); }
  .section { padding: 62px 0; }
  .section-tight { padding: 44px 0; }
  .hero { padding-top: 56px; }
  .hero-grid { gap: 34px; }
  h1 { font-size: 43px; }
  .hero-subtitle { font-size: 25px; }
  .highlight-strip { margin-top: -12px; }
  .highlight-grid, .card-grid, .card-grid.two, .review-grid, .service-grid { grid-template-columns: 1fr; }
  .channel-pill { flex-basis: 100%; }
  .security-card { grid-template-columns: 1fr; text-align: center; }
  .security-card img { margin: 0 auto; }
  .card img, .zone-card img { height: 220px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
  .mobile-quick-nav { position: fixed; left: 12px; right: 12px; bottom: 10px; z-index: 9998; min-height: 58px; display: grid; grid-template-columns: repeat(4, 1fr); background: rgba(11,16,36,.96); backdrop-filter: blur(12px); border-radius: 18px; box-shadow: 0 18px 46px rgba(11,16,36,.28); overflow: hidden; }
  .mobile-quick-nav a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1px; color: #DDE5FF; font-size: 12px; }
  .mobile-quick-nav span { font-size: 18px; line-height: 1; }
}
@media (max-width: 420px) {
  .site-logo strong { display: none; }
  .header-actions .main-btn { min-width: 84px; }
  .footer-inner { grid-template-columns: 1fr; }
}