:root {
  --bg: #F5F7FF;
  --ink: #1F2740;
  --title: #131A35;
  --muted: #66708A;
  --soft: #9AA4BA;
  --primary: #5B6CFF;
  --purple: #7A5CFF;
  --cyan: #00D4FF;
  --gold: #FFC857;
  --rose: #D94F70;
  --nav: rgba(12,18,40,0.94);
  --dark: #11182F;
  --footer: #0B1024;
  --card: #FFFFFF;
  --line: rgba(91,108,255,0.18);
  --shadow: 0 20px 46px rgba(25,43,91,0.14);
  --radius: 24px;
  --max: 1240px;
}
* { 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: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
.site-header { position: sticky; top: 0; width: 100%; z-index: 9999; background: var(--nav); backdrop-filter: blur(12px); box-shadow: 0 8px 26px rgba(25,43,91,0.16); }
.header-inner { max-width: 1280px; margin: 0 auto; min-height: 72px; padding: 0 22px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.site-logo, .footer-logo { display: inline-flex; align-items: center; gap: 10px; color: #fff; font-size: 19px; white-space: nowrap; }
.site-logo img { width: 44px; height: 44px; object-fit: contain; display: block; }
.nav-core { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.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, .secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 22px; border-radius: 999px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease; }
.main-btn { color: #fff; background: linear-gradient(135deg, #5B6CFF 0%, #7A5CFF 48%, #00D4FF 100%); box-shadow: 0 14px 32px rgba(91,108,255,0.22); }
.main-btn:hover, .secondary-btn:hover { transform: translateY(-2px); }
.secondary-btn { color: var(--primary); background: #fff; border: 1px solid var(--line); }
.menu-toggle, .drawer-close { border: 0; background: transparent; color: #fff; cursor: pointer; }
.menu-toggle { width: 42px; height: 42px; border-radius: 14px; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; background: rgba(255,255,255,.08); }
.menu-toggle span { width: 20px; height: 2px; border-radius: 2px; background: #fff; }
.mobile-menu-toggle { display: none; }
.drawer-mask { position: fixed; inset: 0; z-index: 10000; background: rgba(5,10,27,.58); opacity: 0; visibility: hidden; transition: .25s ease; }
.site-drawer { position: fixed; top: 0; right: 0; z-index: 10001; width: min(390px, 92vw); height: 100vh; padding: 28px; background: #10172e; color: #fff; transform: translateX(105%); transition: transform .28s ease; overflow-y: auto; }
.drawer-open { overflow: hidden; }
.drawer-open .drawer-mask { opacity: 1; visibility: visible; }
.drawer-open .site-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.drawer-head strong { display: block; margin-top: 2px; font-size: 23px; }
.drawer-close { font-size: 34px; line-height: 1; }
.drawer-nav { display: grid; gap: 8px; }
.drawer-nav a { display: flex; align-items: center; justify-content: space-between; padding: 13px 15px; border-radius: 14px; color: #eef2ff; background: rgba(255,255,255,.045); }
.drawer-nav a:hover, .drawer-nav a.active { background: linear-gradient(135deg, rgba(91,108,255,.35), rgba(0,212,255,.15)); }
.drawer-nav em { color: #91def2; font-size: 12px; font-style: normal; }
.drawer-note { margin-top: 22px; padding: 16px; border-radius: 16px; color: #bcc6df; background: rgba(255,255,255,.05); font-size: 13px; }
.section { padding: 82px 22px; }
.section-compact { padding: 52px 22px; }
.container { width: 100%; max-width: var(--max); margin: 0 auto; }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-kicker { display: inline-block; color: var(--purple); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3, .section-title { margin-top: 0; color: var(--title); line-height: 1.22; }
h1 { font-size: clamp(40px, 6vw, 76px); margin-bottom: 22px; }
h2 { font-size: clamp(30px, 4vw, 46px); margin-bottom: 18px; }
h3 { font-size: 21px; margin-bottom: 12px; }
p { margin-top: 0; }
.lead { color: var(--muted); font-size: clamp(17px, 2vw, 20px); }
.muted { color: var(--muted); }
.text-link { color: var(--primary); font-weight: 700; }
.text-link:hover { color: var(--purple); }
.hero { position: relative; padding: 82px 22px 66px; overflow: hidden; background: radial-gradient(circle at 15% 12%, rgba(122,92,255,.18), transparent 32%), radial-gradient(circle at 88% 30%, rgba(0,212,255,.17), transparent 30%), linear-gradient(145deg, #f8f4ff 0%, #eef7ff 54%, #fff6fb 100%); }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(4px); pointer-events: none; }
.hero::before { width: 220px; height: 220px; left: -80px; bottom: -80px; background: rgba(255,200,87,.22); }
.hero::after { width: 300px; height: 300px; right: -120px; top: -80px; background: rgba(217,79,112,.12); }
.hero-grid { position: relative; z-index: 1; max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1.03fr .97fr; align-items: center; gap: 58px; }
.hero-copy { max-width: 650px; }
.hero-title-note { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 20px; padding: 8px 14px; border: 1px solid rgba(91,108,255,.16); border-radius: 999px; background: rgba(255,255,255,.74); color: var(--primary); font-weight: 700; }
.hero-title-note::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(0,212,255,.12); }
.hero-subtitle { margin-bottom: 18px; color: var(--purple); font-size: clamp(22px, 3vw, 34px); font-weight: 800; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 24px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-points span, .pill { padding: 7px 12px; border-radius: 999px; color: #38415e; background: rgba(255,255,255,.8); border: 1px solid rgba(91,108,255,.14); font-size: 13px; }
.hero-visual { position: relative; }
.hero-visual img { width: 100%; max-height: 570px; object-fit: contain; filter: drop-shadow(0 30px 35px rgba(25,43,91,.18)); }
.floating-card { position: absolute; padding: 14px 17px; border-radius: 18px; background: rgba(255,255,255,.9); border: 1px solid rgba(255,255,255,.8); box-shadow: var(--shadow); backdrop-filter: blur(10px); }
.floating-card strong { display: block; color: var(--title); }
.floating-card small { color: var(--muted); }
.floating-card.one { left: -22px; bottom: 62px; }
.floating-card.two { right: -12px; top: 58px; }
.highlight-bar { position: relative; z-index: 2; max-width: var(--max); margin: -20px auto 0; padding: 0 22px; }
.highlight-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.highlight-item { padding: 22px; border-radius: 20px; background: #fff; border: 1px solid var(--line); box-shadow: 0 14px 34px rgba(25,43,91,.1); }
.highlight-item strong { display: block; margin-bottom: 6px; color: var(--title); }
.highlight-item p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.channel-cloud { display: flex; flex-wrap: wrap; gap: 12px; }
.channel-pill { flex: 1 1 190px; min-width: 180px; padding: 16px 18px; border-radius: 999px; background: #fff; border: 1px solid var(--line); box-shadow: 0 10px 28px rgba(25,43,91,.08); }
.channel-pill strong { display: block; color: var(--title); font-size: 15px; }
.channel-pill span { color: var(--muted); font-size: 12px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: center; }
.split.reverse .media { order: 2; }
.media { position: relative; }
.media img, .content-img, .zone-card img, .app-section img { width: 100%; max-height: 500px; object-fit: contain; border-radius: 24px; }
.media-frame { padding: 22px; border-radius: 30px; background: linear-gradient(145deg, rgba(91,108,255,.1), rgba(0,212,255,.08)); border: 1px solid rgba(91,108,255,.14); }
.copy-card { padding: 10px 0; }
.copy-card p { color: var(--muted); }
.feature-list { display: grid; gap: 12px; margin: 22px 0; }
.feature-item { display: flex; gap: 13px; align-items: flex-start; }
.feature-item b { flex: 0 0 auto; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 10px; color: #fff; background: linear-gradient(135deg, var(--primary), var(--cyan)); }
.feature-item span { color: var(--muted); }
.cards-2, .cards-3, .cards-4, .reviews, .faq-grid, .steps { display: grid; gap: 20px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.card, .zone-card, .info-card, .review-card, .faq-card, .step-card { background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: var(--radius); }
.card, .info-card, .review-card, .faq-card, .step-card { padding: 28px; }
.zone-card { overflow: hidden; }
.zone-card .zone-media { padding: 18px 18px 0; }
.zone-card .zone-body { padding: 24px 26px 28px; }
.zone-card p, .card p, .info-card p, .review-card p, .faq-card p, .step-card p { color: var(--muted); }
.label-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.label, .tag, .badge { display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px; border-radius: 999px; color: #7d5a00; background: #fff4d6; font-size: 12px; font-weight: 700; }
.dark-zone { color: #eef2ff; background: linear-gradient(150deg, #11182f 0%, #17254f 54%, #13243e 100%); }
.dark-zone h2, .dark-zone h3 { color: #fff; }
.dark-zone p { color: #bfc9df; }
.dark-zone .card { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.1); box-shadow: none; }
.security-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.security-card { padding: 30px; border-radius: 26px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.security-card img { width: 100%; max-height: 280px; object-fit: contain; margin-bottom: 20px; }
.reviews { grid-template-columns: repeat(3, 1fr); }
.review-card::before { content: "“"; display: block; height: 28px; color: var(--purple); font-size: 52px; font-family: Georgia, serif; line-height: .8; }
.review-meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 18px; color: var(--soft); font-size: 13px; }
.faq-list { display: grid; gap: 14px; }
details.faq-item { padding: 0 22px; border-radius: 18px; background: #fff; border: 1px solid var(--line); box-shadow: 0 10px 28px rgba(25,43,91,.08); }
details.faq-item summary { cursor: pointer; list-style: none; padding: 19px 0; color: var(--title); font-weight: 800; }
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after { content: "+"; float: right; color: var(--primary); font-size: 24px; font-weight: 400; }
details.faq-item[open] summary::after { content: "−"; }
details.faq-item p { padding-bottom: 20px; color: var(--muted); }
.notice-strip { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 20px; padding: 26px 30px; border-radius: 24px; background: linear-gradient(135deg, #fff4d6, #eef8ff 54%, #f4efff); border: 1px solid rgba(91,108,255,.14); }
.notice-strip strong { color: var(--title); font-size: 20px; }
.notice-strip p { margin: 0; color: var(--muted); }
.page-hero { position: relative; padding: 72px 22px; overflow: hidden; background: radial-gradient(circle at 14% 18%, rgba(122,92,255,.2), transparent 28%), radial-gradient(circle at 88% 35%, rgba(0,212,255,.16), transparent 30%), linear-gradient(145deg, #f7f3ff, #eef8ff 52%, #fff8fb); }
.page-hero-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1fr .86fr; gap: 48px; align-items: center; }
.page-hero h1 { font-size: clamp(38px, 5vw, 62px); }
.page-hero img { width: 100%; max-height: 430px; object-fit: contain; filter: drop-shadow(0 24px 32px rgba(25,43,91,.16)); }
.breadcrumb { display: flex; gap: 8px; align-items: center; margin-bottom: 18px; color: var(--muted); font-size: 13px; }
.breadcrumb a { color: var(--primary); }
.article-copy { max-width: 820px; }
.article-copy p { color: var(--muted); }
.steps { grid-template-columns: repeat(3, 1fr); }
.step-number { display: inline-grid; place-items: center; width: 40px; height: 40px; margin-bottom: 16px; border-radius: 14px; color: #fff; background: linear-gradient(135deg, var(--primary), var(--purple), var(--cyan)); font-weight: 900; }
.faq-grid { grid-template-columns: repeat(2, 1fr); }
.site-footer { padding: 64px 22px 100px; color: #EEF2FF; background: var(--footer); }
.footer-inner { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 60px; }
.footer-brand p { max-width: 430px; margin-top: 16px; color: #aeb9d2; }
.footer-logo img { width: 46px; height: 46px; object-fit: contain; }
.footer-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.footer-links strong { display: block; margin-bottom: 14px; color: #fff; }
.footer-links a { display: block; margin: 8px 0; color: #aeb9d2; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { max-width: var(--max); margin: 42px auto 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); color: #8f9ab4; font-size: 13px; }
.footer-bottom p:last-child { margin-bottom: 0; }
.mobile-bottom-nav { display: none; }
@media (max-width: 1050px) {
  .nav-core { display: none; }
  .highlight-grid, .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .reviews, .cards-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .section { padding: 62px 18px; }
  .section-compact { padding: 42px 18px; }
  .header-inner { min-height: 64px; padding: 0 12px; gap: 8px; }
  .mobile-menu-toggle { display: inline-flex; order: 1; }
  .site-logo { order: 2; margin: 0 auto; font-size: 16px; }
  .site-logo img { width: 38px; height: 38px; }
  .site-logo strong { display: none; }
  .header-actions { order: 3; }
  .desktop-menu-toggle { display: none; }
  .header-cta { min-height: 40px; padding: 0 14px; font-size: 13px; }
  .hero { padding: 56px 18px 50px; }
  .hero-grid, .page-hero-grid, .split { grid-template-columns: 1fr; gap: 34px; }
  .hero-copy { max-width: none; }
  .hero-visual { max-width: 650px; margin: 0 auto; }
  .floating-card.one { left: 0; bottom: 20px; }
  .floating-card.two { right: 0; top: 20px; }
  .highlight-bar { margin-top: 0; padding: 18px; }
  .split.reverse .media { order: initial; }
  .security-panel { grid-template-columns: 1fr; }
  .steps, .faq-grid { grid-template-columns: 1fr; }
  .notice-strip { grid-template-columns: 1fr; text-align: center; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  .site-footer { padding-bottom: 120px; }
  .mobile-bottom-nav { position: fixed; left: 12px; right: 12px; bottom: max(10px, env(safe-area-inset-bottom)); z-index: 9998; display: grid; grid-template-columns: repeat(4, 1fr); padding: 8px; border-radius: 20px; background: rgba(11,16,36,.96); box-shadow: 0 18px 40px rgba(5,10,27,.32); backdrop-filter: blur(14px); }
  .mobile-bottom-nav a { display: grid; justify-items: center; gap: 2px; padding: 7px 4px; border-radius: 14px; color: #b9c4df; font-size: 11px; }
  .mobile-bottom-nav a span { font-size: 18px; line-height: 1; }
  .mobile-bottom-nav a.active { color: #fff; background: rgba(91,108,255,.32); }
}
@media (max-width: 620px) {
  body { padding-bottom: 76px; }
  .highlight-grid, .cards-2, .cards-3, .cards-4, .reviews { grid-template-columns: 1fr; }
  .channel-pill { flex-basis: 100%; }
  .floating-card { display: none; }
  .page-hero { padding: 54px 18px; }
  .card, .info-card, .review-card, .faq-card, .step-card { padding: 23px; }
  .footer-links { grid-template-columns: 1fr 1fr; gap: 20px; }
}