:root {
  --bg: #F4FBFF;
  --nav: #FFFFFF;
  --soft: #E8F7FF;
  --card: #FFFFFF;
  --primary: #11AEEA;
  --blue: #1688D8;
  --deep: #155A9D;
  --text: #24384A;
  --muted: #60758A;
  --border: rgba(17,174,234,.18);
  --footer: #073A68;
  --footer-text: #EAF8FF;
  --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
  --shadow: 0 18px 45px rgba(22,136,216,.12);
  --shadow-sm: 0 10px 28px rgba(22,136,216,.09);
  --radius: 24px;
  --radius-sm: 16px;
  --header-h: 76px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 0; overflow-x: hidden; background: var(--bg); color: var(--text); font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; line-height: 1.75; }
body.menu-open { overflow: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 2000; background: var(--deep); color: #fff; padding: 10px 16px; border-radius: 10px; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 1000; height: var(--header-h); background: rgba(255,255,255,.96); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); box-shadow: 0 6px 24px rgba(21,90,157,.06); }
.header-inner { width: min(100% - 32px, 1360px); height: 100%; margin: 0 auto; display: flex; align-items: center; gap: clamp(14px, 2vw, 30px); }
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img { width: clamp(112px, 10vw, 148px); height: 46px; object-fit: contain; }
.desktop-nav { min-width: 0; flex: 1; display: flex; justify-content: center; align-items: center; gap: clamp(8px, 1.15vw, 18px); white-space: nowrap; }
.desktop-nav a { position: relative; flex: 0 1 auto; padding: 8px 2px; color: #35566f; font-size: clamp(13px, .96vw, 15px); font-weight: 700; transition: color .2s ease; }
.desktop-nav a:hover, .desktop-nav a.active { color: var(--blue); }
.desktop-nav a.active::after { content: ""; position: absolute; left: 12%; right: 12%; bottom: 0; height: 3px; border-radius: 3px; background: var(--gradient); }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn, .secondary-btn, .text-link { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; border-radius: 999px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.main-btn { padding: 0 25px; color: #fff; background: var(--gradient); box-shadow: 0 10px 26px rgba(22,136,216,.24); white-space: nowrap; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22,136,216,.30); }
.secondary-btn { padding: 0 22px; color: var(--blue); background: #fff; border: 1px solid var(--border); }
.secondary-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.text-link { min-height: auto; justify-content: flex-start; color: var(--blue); border-radius: 0; }
.text-link::after { content: "→"; margin-left: 7px; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; border-radius: 14px; background: var(--soft); cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--deep); }
.menu-overlay { position: fixed; inset: 0; z-index: 1090; background: rgba(7,58,104,.42); }
.mobile-menu { position: fixed; top: 0; right: 0; z-index: 1100; width: min(88vw, 380px); height: 100dvh; padding: 20px; background: #fff; transform: translateX(105%); transition: transform .25s ease; overflow-y: auto; box-shadow: -16px 0 42px rgba(7,58,104,.18); }
.mobile-menu.open { transform: translateX(0); }
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.menu-close { width: 42px; height: 42px; border: 0; border-radius: 50%; background: var(--soft); color: var(--deep); font-size: 28px; cursor: pointer; }
.mobile-menu nav { display: grid; gap: 6px; padding: 18px 0; }
.mobile-menu nav a { padding: 11px 14px; border-radius: 12px; color: var(--text); font-weight: 700; }
.mobile-menu nav a:hover, .mobile-menu nav a.active { color: var(--blue); background: var(--soft); }
.mobile-register { width: 100%; }
main { min-height: 60vh; }
.container { width: min(100% - 32px, 1200px); margin: 0 auto; }
.wide-container { width: min(100% - 32px, 1360px); margin: 0 auto; }
.section { padding: clamp(58px, 7vw, 96px) 0; }
.section.compact { padding: clamp(42px, 5vw, 70px) 0; }
.section-soft { background: var(--soft); }
.section-deep { background: linear-gradient(135deg, #0b548d 0%, #0a7fc4 100%); color: #fff; }
.section-head { max-width: 760px; margin-bottom: 32px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 10px; color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
.eyebrow::before { content: ""; width: 24px; height: 3px; border-radius: 3px; background: var(--gradient); }
h1, h2, h3 { margin: 0 0 14px; line-height: 1.3; color: var(--deep); }
h1 { font-size: clamp(34px, 5vw, 58px); }
h2 { font-size: clamp(28px, 3.7vw, 42px); }
h3 { font-size: clamp(20px, 2vw, 24px); }
p { margin: 0 0 14px; }
.lead { color: var(--muted); font-size: clamp(17px, 1.8vw, 20px); }
.section-deep h2, .section-deep h3 { color: #fff; }
.section-deep .lead, .section-deep p { color: rgba(255,255,255,.82); }
.page-hero { padding: clamp(58px, 7vw, 92px) 0; background: radial-gradient(circle at 85% 20%, rgba(53,215,255,.23), transparent 28%), linear-gradient(180deg, #fff, #ecf8ff); border-bottom: 1px solid var(--border); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); gap: clamp(28px, 5vw, 70px); align-items: center; }
.hero-copy p { max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.hero-media, .image-card { border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.hero-media img, .image-card img { width: 100%; height: auto; max-height: 480px; object-fit: contain; background: #fff; }
.carousel-wrap { padding: 24px 0 0; }
.carousel { position: relative; overflow: hidden; border: 1px solid var(--border); border-radius: 26px; background: #eaf8ff; box-shadow: var(--shadow); }
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.carousel-slide { min-width: 100%; aspect-ratio: 16/6.2; display: grid; place-items: center; background: #eaf8ff; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; }
.carousel-arrow { position: absolute; top: 50%; z-index: 2; transform: translateY(-50%); width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.65); border-radius: 50%; color: #fff; background: rgba(7,58,104,.52); backdrop-filter: blur(10px); cursor: pointer; font-size: 26px; }
.carousel-arrow:hover { background: rgba(7,58,104,.74); }
.carousel-prev { left: 18px; }
.carousel-next { right: 18px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 2; display: flex; gap: 8px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); box-shadow: 0 1px 4px rgba(7,58,104,.22); cursor: pointer; }
.carousel-dot.active { width: 28px; border-radius: 99px; background: #fff; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { min-width: 0; padding: 26px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--card); box-shadow: var(--shadow-sm); }
.card:hover { transform: translateY(-3px); transition: transform .2s ease; }
.card p { color: var(--muted); }
.card-tag { display: inline-flex; margin-bottom: 14px; padding: 5px 11px; border-radius: 999px; color: var(--blue); background: var(--soft); font-size: 13px; font-weight: 800; }
.icon-badge { display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 16px; border-radius: 16px; color: #fff; background: var(--gradient); font-weight: 900; box-shadow: 0 10px 24px rgba(22,136,216,.22); }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, .9fr); gap: clamp(30px, 5vw, 68px); align-items: center; }
.split.reverse .image-card { order: -1; }
.check-list { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 31px; color: var(--text); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; display: grid; place-items: center; width: 21px; height: 21px; border-radius: 50%; color: #fff; background: var(--gradient); font-size: 12px; font-weight: 900; }
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.step { position: relative; padding: 28px; border-radius: var(--radius-sm); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); display: inline-flex; margin-bottom: 16px; color: var(--primary); font-size: 30px; font-weight: 900; }
.notice { padding: 24px 26px; border: 1px solid var(--border); border-left: 5px solid var(--primary); border-radius: var(--radius-sm); background: #fff; box-shadow: var(--shadow-sm); }
.notice strong { color: var(--deep); }
.testimonials { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.quote { padding: 25px; border-radius: var(--radius-sm); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.quote p { color: #456176; }
.quote footer { margin-top: 18px; color: var(--blue); font-weight: 800; }
.link-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.link-list a { display: flex; justify-content: space-between; align-items: center; padding: 16px 18px; border: 1px solid var(--border); border-radius: 14px; background: #fff; color: var(--deep); font-weight: 800; }
.link-list a::after { content: "→"; color: var(--primary); }
.faq-list { display: grid; gap: 14px; }
.faq-list details { border: 1px solid var(--border); border-radius: 16px; background: #fff; box-shadow: var(--shadow-sm); overflow: hidden; }
.faq-list summary { cursor: pointer; list-style: none; padding: 20px 54px 20px 22px; color: var(--deep); font-weight: 800; position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 22px; top: 16px; color: var(--primary); font-size: 26px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-answer { padding: 0 22px 20px; color: var(--muted); }
.cta-band { display: flex; justify-content: space-between; align-items: center; gap: 26px; padding: clamp(28px, 5vw, 46px); border-radius: var(--radius); color: #fff; background: linear-gradient(135deg, #0a72b7, #15b7eb); box-shadow: var(--shadow); }
.cta-band h2, .cta-band p { color: #fff; }
.cta-band p { opacity: .86; max-width: 740px; }
.media-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.media-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow-sm); }
.media-card img { width: 100%; aspect-ratio: 16/10; object-fit: contain; background: #f7fcff; }
.media-card-content { padding: 22px; }
.site-footer { padding-top: 64px; color: var(--footer-text); background: var(--footer); }
.footer-inner { width: min(100% - 32px, 1200px); margin: 0 auto; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 60px; padding-bottom: 44px; }
.footer-brand p { max-width: 460px; color: rgba(234,248,255,.72); }
.footer-logo img { width: 150px; height: 54px; margin-bottom: 18px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
.footer-links h2 { color: #fff; font-size: 18px; }
.footer-links a { display: block; margin: 8px 0; color: rgba(234,248,255,.72); }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(234,248,255,.13); padding: 20px 16px; text-align: center; }
.footer-bottom p { margin: 3px 0; color: rgba(234,248,255,.68); font-size: 14px; }
@media (max-width: 1180px) {
  .desktop-nav { display: none; }
  .header-inner { justify-content: space-between; }
  .menu-toggle { display: block; }
}
@media (max-width: 900px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .split.reverse .image-card { order: 0; }
  .card-grid, .card-grid.four, .steps, .testimonials { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .carousel-slide { aspect-ratio: 16/8; }
}
@media (max-width: 640px) {
  :root { --header-h: 68px; }
  .header-inner, .container, .wide-container { width: min(100% - 24px, 1200px); }
  .brand-logo img { width: 108px; height: 40px; }
  .main-btn { min-height: 40px; padding: 0 19px; }
  .header-actions .main-btn { padding: 0 17px; }
  .menu-toggle { width: 40px; height: 40px; }
  .carousel-wrap { padding-top: 14px; }
  .carousel { border-radius: 18px; }
  .carousel-slide { aspect-ratio: 16/10; }
  .carousel-arrow { width: 38px; height: 38px; font-size: 21px; }
  .carousel-prev { left: 10px; }
  .carousel-next { right: 10px; }
  .carousel-dots { bottom: 10px; }
  .card-grid, .card-grid.two, .card-grid.four, .steps, .testimonials, .media-grid, .link-list { grid-template-columns: 1fr; }
  .card, .step, .quote { padding: 22px; }
  .cta-band { align-items: flex-start; flex-direction: column; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 34px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}