:root {
    --bg: #F4FBFF;
    --surface-soft: #E8F7FF;
    --surface: #FFFFFF;
    --cyan: #11AEEA;
    --blue: #1688D8;
    --deep-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17,174,234,0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --shadow: 0 18px 50px rgba(21,90,157,0.12);
    --shadow-soft: 0 10px 28px rgba(21,90,157,0.09);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 2000; padding: 10px 14px; border-radius: 10px; background: var(--deep-blue); color: #fff; transition: top .2s; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.94); border-bottom: 1px solid transparent; backdrop-filter: blur(16px); transition: box-shadow .25s, border-color .25s; }
.site-header.is-scrolled { border-color: var(--border); box-shadow: 0 8px 28px rgba(21,90,157,.09); }
.header-inner { width: min(100% - 32px, 1360px); min-height: 76px; margin-inline: auto; display: flex; align-items: center; gap: clamp(14px, 2vw, 30px); }
.brand-logo, .drawer-logo, .footer-logo { flex: 0 0 auto; }
.brand-logo img { width: clamp(112px, 10vw, 152px); height: 44px; object-fit: contain; }
.desktop-nav { flex: 1 1 auto; min-width: 0; display: flex; align-items: center; justify-content: center; gap: clamp(7px, 1.05vw, 17px); }
.desktop-nav a { position: relative; flex: 0 1 auto; white-space: nowrap; font-size: clamp(12px, .94vw, 15px); color: var(--text); padding: 25px 0 22px; transition: color .2s; }
.desktop-nav a::after { content: ""; position: absolute; left: 50%; right: 50%; bottom: 16px; height: 3px; border-radius: 99px; background: var(--gradient); transition: left .2s, right .2s; }
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--blue); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { left: 12%; right: 12%; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 10px 24px; border-radius: 999px; background: var(--gradient); color: #fff; font-weight: 700; white-space: nowrap; border: 0; box-shadow: 0 10px 22px rgba(22,136,216,.22); transition: transform .2s, box-shadow .2s; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(22,136,216,.28); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 1px solid var(--border); border-radius: 13px; background: #fff; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 10px; background: var(--deep-blue); }
.mobile-drawer { position: fixed; inset: 0 0 0 auto; z-index: 1200; width: min(88vw, 390px); padding: 20px; overflow-y: auto; background: #fff; box-shadow: -20px 0 60px rgba(7,58,104,.2); transform: translateX(105%); transition: transform .24s ease; }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-backdrop { position: fixed; inset: 0; z-index: 1100; background: rgba(7,58,104,.42); opacity: 0; transition: opacity .22s; }
.drawer-backdrop.is-visible { opacity: 1; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 15px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 128px; height: 42px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 50%; background: var(--surface-soft); color: var(--deep-blue); font-size: 28px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; padding: 18px 0; }
.drawer-nav a { padding: 11px 12px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg); color: var(--deep-blue); font-weight: 600; text-align: center; }
.drawer-register { width: 100%; }
main { min-height: 70vh; }
.page-shell { width: min(100% - 32px, 1240px); margin-inline: auto; }
.section { padding: clamp(52px, 7vw, 96px) 0; }
.section-compact { padding: clamp(34px, 5vw, 66px) 0; }
.soft-section { background: var(--surface-soft); }
.section-heading { max-width: 760px; margin: 0 auto 34px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 10px; color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
.eyebrow::before { content: ""; width: 28px; height: 3px; border-radius: 99px; background: var(--gradient); }
h1, h2, h3 { margin-top: 0; color: var(--deep-blue); line-height: 1.28; }
h1 { margin-bottom: 18px; font-size: clamp(32px, 5vw, 58px); letter-spacing: -.035em; }
h2 { margin-bottom: 14px; font-size: clamp(25px, 3.4vw, 40px); }
h3 { margin-bottom: 10px; font-size: clamp(18px, 2vw, 23px); }
p { margin-top: 0; }
.lead { color: var(--muted); font-size: clamp(16px, 1.7vw, 19px); }
.page-hero { position: relative; overflow: hidden; padding: clamp(62px, 8vw, 108px) 0; background: linear-gradient(135deg, #F4FBFF 0%, #E8F7FF 55%, #DDF7FF 100%); }
.page-hero::before, .page-hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.page-hero::before { width: 340px; height: 340px; right: -100px; top: -120px; background: rgba(53,215,255,.18); }
.page-hero::after { width: 220px; height: 220px; left: -90px; bottom: -100px; background: rgba(22,136,216,.12); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr); align-items: center; gap: clamp(28px, 5vw, 70px); }
.hero-copy { max-width: 700px; }
.hero-copy .lead { max-width: 650px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 22px; border: 1px solid var(--border); border-radius: 999px; background: rgba(255,255,255,.85); color: var(--deep-blue); font-weight: 700; }
.hero-image, .feature-image { overflow: hidden; border: 1px solid rgba(255,255,255,.9); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.hero-image img, .feature-image img { width: 100%; height: auto; max-height: 470px; object-fit: contain; background: #fff; }
.carousel-wrap { width: min(100% - 32px, 1360px); margin: 24px auto 0; }
.carousel { position: relative; overflow: hidden; aspect-ratio: 16 / 6.4; min-height: 270px; border: 1px solid var(--border); border-radius: clamp(18px, 3vw, 32px); background: #dff6ff; box-shadow: var(--shadow); }
.carousel-track { display: flex; height: 100%; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.carousel-slide { min-width: 100%; height: 100%; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; background: #eaf9ff; }
.carousel-arrow { position: absolute; top: 50%; z-index: 3; width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.8); border-radius: 50%; background: rgba(7,58,104,.56); color: #fff; font-size: 28px; transform: translateY(-50%); cursor: pointer; backdrop-filter: blur(7px); }
.carousel-arrow:hover { background: rgba(7,58,104,.74); }
.carousel-prev { left: 16px; }
.carousel-next { right: 16px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 3; display: flex; gap: 8px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: rgba(7,58,104,.38); cursor: pointer; }
.carousel-dot.is-active { width: 28px; border-radius: 99px; background: #fff; }
.intro-panel { display: grid; grid-template-columns: 1.2fr .8fr; gap: 26px; align-items: stretch; }
.intro-copy, .info-panel { padding: clamp(26px, 4vw, 46px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-soft); }
.intro-copy h1 { font-size: clamp(30px, 4.2vw, 50px); }
.info-panel { background: linear-gradient(145deg, #FFFFFF 0%, #E8F7FF 100%); }
.info-list { display: grid; gap: 12px; margin: 22px 0 0; padding: 0; list-style: none; }
.info-list li { display: flex; gap: 11px; align-items: flex-start; }
.info-list li::before { content: "✓"; display: grid; flex: 0 0 26px; height: 26px; place-items: center; border-radius: 50%; background: var(--gradient); color: #fff; font-size: 13px; font-weight: 900; }
.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)); }
.content-card { position: relative; overflow: hidden; padding: 26px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); box-shadow: var(--shadow-soft); transition: transform .22s, box-shadow .22s; }
.content-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.content-card::after { content: ""; position: absolute; width: 100px; height: 100px; right: -50px; top: -50px; border-radius: 50%; background: rgba(53,215,255,.12); }
.content-card p { color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--blue); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s; }
.text-link:hover::after { transform: translateX(4px); }
.feature-split { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: center; gap: clamp(28px, 5vw, 64px); }
.feature-split.reverse { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); }
.feature-split.reverse .feature-image { order: 2; }
.feature-copy ul, .check-list { margin: 18px 0 0; padding: 0; list-style: none; }
.feature-copy li, .check-list li { position: relative; padding-left: 28px; margin: 10px 0; color: var(--muted); }
.feature-copy li::before, .check-list li::before { content: ""; position: absolute; left: 0; top: .74em; width: 12px; height: 12px; border: 3px solid #fff; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 2px rgba(17,174,234,.22); transform: translateY(-50%); }
.media-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.media-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #edfaff; }
.media-card .media-body { padding: 24px; }
.timeline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; counter-reset: steps; }
.step { position: relative; padding: 28px 24px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; counter-increment: steps; }
.step::before { content: counter(steps, decimal-leading-zero); display: inline-grid; width: 42px; height: 42px; margin-bottom: 15px; place-items: center; border-radius: 14px; background: var(--gradient); color: #fff; font-weight: 900; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card { padding: 24px; border: 1px solid var(--border); border-radius: var(--radius-md); background: rgba(255,255,255,.94); box-shadow: var(--shadow-soft); }
.review-card blockquote { margin: 0 0 18px; color: var(--text); }
.review-card footer { display: flex; align-items: center; gap: 10px; color: var(--deep-blue); font-weight: 800; }
.review-card footer::before { content: ""; width: 34px; height: 4px; border-radius: 99px; background: var(--gradient); }
.notice { padding: clamp(24px, 4vw, 38px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(135deg, #FFFFFF 0%, #DFF7FF 100%); box-shadow: var(--shadow-soft); }
.notice h2 { font-size: clamp(23px, 3vw, 34px); }
.faq-list { display: grid; gap: 14px; max-width: 960px; margin-inline: auto; }
.faq-item { border: 1px solid var(--border); border-radius: 16px; background: #fff; box-shadow: var(--shadow-soft); }
.faq-item summary { position: relative; padding: 20px 54px 20px 22px; color: var(--deep-blue); font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 20px; top: 50%; width: 28px; height: 28px; border-radius: 50%; background: var(--surface-soft); color: var(--blue); text-align: center; line-height: 28px; transform: translateY(-50%); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 22px 20px; color: var(--muted); }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }
.tag { display: inline-flex; padding: 7px 13px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--deep-blue); font-weight: 700; font-size: 14px; }
.contact-list { display: grid; gap: 15px; }
.contact-item { padding: 22px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.contact-item strong { display: block; margin-bottom: 7px; color: var(--deep-blue); font-size: 18px; }
.site-footer { margin-top: 0; background: var(--footer); color: var(--footer-text); }
.footer-inner { width: min(100% - 32px, 1240px); margin-inline: auto; display: grid; grid-template-columns: 1fr 1.35fr; gap: 60px; padding: 64px 0 42px; }
.footer-logo img { width: 145px; height: 46px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 480px; margin-top: 18px; color: rgba(234,248,255,.78); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.footer-links h2 { margin-bottom: 16px; color: #fff; font-size: 17px; }
.footer-links a { display: block; margin: 8px 0; color: rgba(234,248,255,.78); }
.footer-links a:hover { color: #fff; }
.footer-bottom { width: min(100% - 32px, 1240px); margin-inline: auto; display: flex; justify-content: space-between; gap: 24px; padding: 22px 0 28px; border-top: 1px solid rgba(234,248,255,.14); color: rgba(234,248,255,.68); font-size: 14px; }
.footer-bottom p { margin: 0; }
@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-inner { min-height: 70px; }
    .brand-logo img { width: 126px; }
}
@media (max-width: 960px) {
    .hero-grid, .intro-panel, .feature-split, .feature-split.reverse, .footer-inner { grid-template-columns: 1fr; }
    .feature-split.reverse .feature-image { order: 0; }
    .hero-image { max-width: 760px; }
    .card-grid.four, .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .card-grid, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-inner { gap: 36px; }
}
@media (max-width: 680px) {
    .header-inner, .page-shell, .carousel-wrap, .footer-inner, .footer-bottom { width: min(100% - 24px, 1240px); }
    .header-inner { gap: 10px; }
    .header-actions .main-btn { min-height: 40px; padding: 8px 16px; }
    .menu-toggle { width: 40px; height: 40px; }
    .carousel { aspect-ratio: 16 / 9.4; min-height: 220px; border-radius: 18px; }
    .carousel-arrow { width: 40px; height: 40px; font-size: 24px; }
    .carousel-prev { left: 10px; }
    .carousel-next { right: 10px; }
    .card-grid, .card-grid.two, .card-grid.four, .review-grid, .timeline, .footer-links { grid-template-columns: 1fr; }
    .section { padding: 48px 0; }
    .page-hero { padding: 54px 0; }
    .hero-grid { gap: 28px; }
    .hero-actions { display: grid; grid-template-columns: 1fr 1fr; }
    .hero-actions a { width: 100%; }
    .footer-inner { padding-top: 48px; }
    .footer-bottom { flex-direction: column; }
}
@media (max-width: 430px) {
    .brand-logo img { width: 108px; }
    .header-actions { gap: 7px; }
    .header-actions .main-btn { padding-inline: 13px; }
    .drawer-nav { grid-template-columns: 1fr; }
    .content-card, .review-card, .step { padding: 21px; }
    .hero-actions { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}