:root {
    --page: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --footer: #073A68;
    --line: #D5EBF7;
    --shadow: 0 18px 45px rgba(21, 90, 157, .10);
    --radius: 22px;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
    color: var(--text);
    background: var(--page);
    line-height: 1.75;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 2000; background: #fff; padding: 10px 16px; border-radius: 10px; box-shadow: var(--shadow); }
.skip-link:focus { top: 16px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(213,235,247,.9);
}
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 22px; }
.brand-logo { width: 132px; flex: 0 0 auto; }
.brand-logo img { width: 100%; height: 46px; object-fit: contain; }
.desktop-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; min-width: 0; }
.desktop-nav a { padding: 10px 9px; color: var(--deep); font-size: 14px; white-space: nowrap; border-radius: 12px; transition: .2s; }
.desktop-nav a:hover, .desktop-nav a.active { color: var(--primary); background: var(--soft); }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn, .secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 999px;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn { color: #fff; background: var(--gradient); box-shadow: 0 10px 24px rgba(22,136,216,.24); }
.secondary-btn { color: var(--deep); background: var(--surface); border: 1px solid var(--line); }
.main-btn:hover, .secondary-btn:hover { transform: translateY(-2px); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 14px; background: var(--soft); padding: 10px; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--deep); border-radius: 2px; }

.drawer-backdrop { position: fixed; inset: 0; z-index: 1090; background: rgba(7,58,104,.45); opacity: 0; visibility: hidden; transition: .25s; }
.mobile-drawer { position: fixed; right: 0; top: 0; bottom: 0; z-index: 1100; width: min(360px, 88vw); background: #fff; padding: 18px; transform: translateX(105%); transition: .28s; overflow-y: auto; box-shadow: -20px 0 60px rgba(7,58,104,.18); }
.drawer-open { overflow: hidden; }
.drawer-open .drawer-backdrop { opacity: 1; visibility: visible; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 4px 2px 14px; border-bottom: 1px solid var(--line); color: var(--deep); }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--soft); color: var(--deep); font-size: 26px; }
.mobile-drawer nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 18px 0; }
.mobile-drawer nav a { padding: 12px; border-radius: 12px; background: var(--page); color: var(--deep); font-size: 14px; }
.drawer-register { width: 100%; }

.hero-carousel { position: relative; background: #dff3ff; }
.carousel-viewport { position: relative; width: 100%; aspect-ratio: 16 / 6.7; min-height: 280px; max-height: 620px; overflow: hidden; }
.carousel-slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .6s ease; background: #dff3ff; }
.carousel-slide.active { opacity: 1; pointer-events: auto; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.carousel-arrow { position: absolute; z-index: 3; top: 50%; transform: translateY(-50%); width: 46px; height: 46px; border: 0; border-radius: 50%; background: rgba(255,255,255,.9); color: var(--deep); font-size: 28px; box-shadow: var(--shadow); }
.carousel-arrow.prev { left: max(18px, calc((100vw - 1180px)/2)); }
.carousel-arrow.next { right: max(18px, calc((100vw - 1180px)/2)); }
.carousel-dots { position: absolute; z-index: 3; bottom: 18px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; }
.carousel-dot { width: 10px; height: 10px; border: 0; border-radius: 50%; background: rgba(255,255,255,.7); padding: 0; }
.carousel-dot.active { width: 28px; border-radius: 999px; background: #fff; }

.page-hero { padding: 74px 0 42px; background: radial-gradient(circle at 80% 10%, #d7f4ff 0, rgba(215,244,255,0) 42%), var(--page); }
.page-hero .eyebrow, .section-heading span, .compliance-box span { color: var(--primary); font-weight: 800; letter-spacing: .08em; font-size: 13px; }
.page-hero h1 { margin: 10px 0 16px; max-width: 820px; color: var(--deep); font-size: clamp(34px, 5vw, 60px); line-height: 1.18; }
.page-hero p { max-width: 760px; margin: 0; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.section { padding: 72px 0; }
.section.alt { background: var(--soft); }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.section-heading h2 { margin: 7px 0 10px; color: var(--deep); font-size: clamp(28px, 3.2vw, 42px); line-height: 1.28; }
.section-heading p { margin: 0; color: var(--muted); }
.intro-panel { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: center; padding: 34px; border-radius: 28px; background: #fff; box-shadow: var(--shadow); }
.intro-copy h1, .intro-copy h2 { margin: 0 0 14px; color: var(--deep); line-height: 1.25; }
.intro-copy p { margin: 0 0 14px; color: var(--muted); }

.quick-scroll { display: flex; gap: 12px; overflow-x: auto; padding: 4px 0 12px; scrollbar-width: thin; }
.quick-scroll a { flex: 0 0 auto; padding: 12px 18px; border-radius: 999px; background: #fff; color: var(--deep); border: 1px solid var(--line); box-shadow: 0 8px 20px rgba(21,90,157,.06); }
.quick-scroll a:hover { color: var(--primary); border-color: #a8ddf5; }

.info-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.info-card, .feature-card, .review-card, .faq-item, .service-card { background: #fff; border: 1px solid rgba(213,235,247,.9); border-radius: var(--radius); box-shadow: 0 12px 30px rgba(21,90,157,.06); }
.info-card { padding: 24px; }
.info-card .number { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; background: var(--soft); color: var(--primary); font-weight: 900; }
.info-card h3 { margin: 16px 0 8px; color: var(--deep); }
.info-card p { margin: 0; color: var(--muted); }

.split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
.split-layout.reverse .split-copy { order: 2; }
.split-layout.reverse .media-card { order: 1; }
.split-copy h2 { margin: 0 0 14px; color: var(--deep); font-size: clamp(28px, 3.2vw, 42px); line-height: 1.28; }
.split-copy p { color: var(--muted); }
.list-check { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 10px; }
.list-check li { position: relative; padding-left: 28px; }
.list-check li::before { content: '✓'; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 900; }
.media-card { margin: 0; min-height: 280px; border-radius: 26px; overflow: hidden; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); display: grid; place-items: center; padding: 16px; }
.media-card img { width: 100%; height: 100%; max-height: 520px; object-fit: contain; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { padding: 26px; }
.feature-card h3 { margin: 0 0 10px; color: var(--deep); }
.feature-card p { margin: 0 0 12px; color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 800; }
.text-link::after { content: '→'; }

.app-banner { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 26px; padding: 38px; border-radius: 30px; background: linear-gradient(135deg, #eaf9ff, #ffffff); border: 1px solid #ccecf9; box-shadow: var(--shadow); }
.app-banner h2 { margin: 0 0 12px; color: var(--deep); font-size: clamp(28px, 3.2vw, 42px); }
.app-banner p { color: var(--muted); }

.three-column { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.service-card { overflow: hidden; }
.service-card .service-media { aspect-ratio: 16 / 10; background: var(--soft); display: grid; place-items: center; padding: 12px; }
.service-card .service-media img { width: 100%; height: 100%; object-fit: contain; }
.service-card .service-body { padding: 24px; }
.service-card h3 { margin: 0 0 9px; color: var(--deep); }
.service-card p { margin: 0 0 12px; color: var(--muted); }

.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review-card { position: relative; padding: 26px; }
.review-card .review-mark { position: absolute; right: 20px; top: 8px; color: #d5f2ff; font-size: 64px; line-height: 1; }
.review-card p { position: relative; margin: 0 0 16px; color: var(--text); }
.review-card strong { color: var(--primary); }

.faq-list { display: grid; gap: 14px; }
.faq-item { overflow: hidden; }
.faq-question { width: 100%; border: 0; background: #fff; color: var(--deep); text-align: left; padding: 20px 24px; font-weight: 800; display: flex; justify-content: space-between; gap: 18px; }
.faq-question::after { content: '+'; font-size: 24px; color: var(--primary); }
.faq-item.open .faq-question::after { content: '−'; }
.faq-answer { display: none; padding: 0 24px 22px; color: var(--muted); }
.faq-item.open .faq-answer { display: block; }
.faq-answer p { margin: 0; }

.compliance-box { display: grid; grid-template-columns: .7fr 1.3fr; gap: 28px; align-items: center; padding: 32px; border-radius: 26px; color: #fff; background: linear-gradient(135deg, #0a5d96, #073A68); box-shadow: var(--shadow); }
.compliance-box h2 { margin: 5px 0 0; color: #fff; }
.compliance-box p { margin: 0; color: #eaf8ff; }

.notice-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }
.notice-card { padding: 24px; border-radius: 20px; background: #fff; border-left: 4px solid var(--primary); box-shadow: 0 12px 30px rgba(21,90,157,.06); }
.notice-card h3 { margin: 0 0 8px; color: var(--deep); }
.notice-card p { margin: 0; color: var(--muted); }

.contact-form { display: grid; gap: 14px; padding: 28px; border-radius: 24px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.contact-form label { color: var(--deep); font-weight: 700; }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; border: 1px solid var(--line); border-radius: 14px; background: var(--page); padding: 13px 14px; color: var(--text); }
.contact-form textarea { min-height: 130px; resize: vertical; }

.site-footer { margin-top: 20px; padding: 58px 0 22px; background: var(--footer); color: #EAF8FF; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 34px; }
.site-footer h2, .site-footer h3 { margin-top: 0; color: #fff; }
.site-footer a { display: block; width: fit-content; margin: 8px 0; color: #cfeeff; }
.site-footer a:hover { color: #fff; }
.footer-brand p { max-width: 420px; color: #cfeeff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 24px; margin-top: 34px; border-top: 1px solid rgba(255,255,255,.14); color: #cfeeff; font-size: 14px; }
.footer-bottom p { margin: 0; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .header-inner { min-height: 70px; }
    .header-actions { margin-left: auto; }
    .menu-toggle { display: block; }
}
@media (max-width: 900px) {
    .info-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid, .three-column, .review-grid { grid-template-columns: repeat(2, 1fr); }
    .split-layout, .app-banner, .intro-panel, .compliance-box { grid-template-columns: 1fr; }
    .split-layout.reverse .split-copy, .split-layout.reverse .media-card { order: initial; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .carousel-viewport { aspect-ratio: 16 / 8.5; }
}
@media (max-width: 640px) {
    .container { width: min(100% - 24px, 1180px); }
    .brand-logo { width: 112px; }
    .main-btn { min-height: 40px; padding: 0 17px; }
    .header-actions { gap: 8px; }
    .carousel-viewport { min-height: 210px; aspect-ratio: 16 / 10; }
    .carousel-arrow { width: 40px; height: 40px; font-size: 24px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 12px; }
    .section { padding: 50px 0; }
    .page-hero { padding: 52px 0 28px; }
    .page-hero h1 { font-size: 36px; }
    .intro-panel, .app-banner { padding: 24px; }
    .info-grid, .feature-grid, .three-column, .review-grid, .notice-grid { grid-template-columns: 1fr; }
    .media-card { min-height: 220px; padding: 10px; }
    .mobile-drawer nav { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; }
}