:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --blue: #1688D8;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16,174,234,0.18);
    --footer: #073A68;
    --shadow: 0 18px 48px rgba(22, 136, 216, 0.12);
    --radius-lg: 28px;
    --radius-md: 18px;
    --header-h: 76px;
}
* { 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: "Microsoft YaHei", "PingFang SC", 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 { font: inherit; }
.container { width: min(100% - 32px, 1200px); margin-inline: auto; }
.section { padding: clamp(52px, 7vw, 92px) 0; }
.section-tight { padding: clamp(36px, 5vw, 64px) 0; }
.section-soft { background: var(--soft); }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 1000; background: #fff; padding: 10px 16px; border-radius: 10px; }
.skip-link:focus { top: 12px; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(14px, 1.7vw, 26px);
    min-width: 0;
}
.brand-logo { flex: 0 0 auto; width: clamp(96px, 9vw, 130px); }
.brand-logo img { width: 100%; height: 42px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(7px, .9vw, 15px);
    white-space: nowrap;
}
.nav-link {
    position: relative;
    flex: 0 0 auto;
    padding: 9px 0;
    color: #31546f;
    font-size: clamp(12px, .88vw, 14px);
    font-weight: 700;
}
.nav-link::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px; background: var(--primary); transform: scaleX(0); transition: .2s; }
.nav-link:hover, .nav-link.active { color: var(--blue); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 10px 22px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 10px 24px rgba(22,136,216,.22);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(22,136,216,.3); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--border); background: #fff; border-radius: 14px; padding: 10px; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--deep); border-radius: 99px; }
.drawer-backdrop { position: fixed; inset: 0; z-index: 198; background: rgba(7,58,104,.34); opacity: 0; visibility: hidden; transition: .25s; }
.mobile-drawer { position: fixed; top: 0; right: 0; z-index: 199; width: min(88vw, 380px); height: 100dvh; padding: 22px; background: #fff; transform: translateX(102%); transition: .25s; overflow-y: auto; box-shadow: -24px 0 60px rgba(7,58,104,.2); }
.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; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 112px; height: 42px; object-fit: contain; }
.drawer-close { border: 0; background: var(--soft); width: 42px; height: 42px; border-radius: 50%; color: var(--deep); font-size: 28px; cursor: pointer; }
.drawer-nav { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; margin: 22px 0; }
.drawer-nav a { padding: 12px 14px; border: 1px solid var(--border); border-radius: 13px; background: #fbfeff; color: var(--deep); font-weight: 700; }
.drawer-register { width: 100%; }
.carousel-wrap { padding: 24px 0 0; }
.carousel { position: relative; width: min(100% - 32px, 1360px); margin-inline: auto; border-radius: var(--radius-lg); overflow: hidden; background: var(--soft); box-shadow: var(--shadow); aspect-ratio: 16 / 6.2; min-height: 280px; }
.carousel-track, .carousel-slide { position: absolute; inset: 0; }
.carousel-slide { opacity: 0; visibility: hidden; transition: opacity .55s ease; }
.carousel-slide.active { opacity: 1; visibility: visible; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; background: var(--soft); }
.carousel-arrow { position: absolute; top: 50%; z-index: 3; transform: translateY(-50%); width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.72); border-radius: 50%; background: rgba(7,58,104,.38); color: #fff; font-size: 28px; cursor: pointer; }
.carousel-arrow:hover { background: rgba(7,58,104,.65); }
.carousel-arrow.prev { left: 20px; }
.carousel-arrow.next { right: 20px; }
.carousel-dots { position: absolute; z-index: 4; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; gap: 9px; }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.65); cursor: pointer; box-shadow: 0 0 0 1px rgba(7,58,104,.15); }
.carousel-dot.active { width: 28px; border-radius: 99px; background: #fff; }
.hero-below { padding: clamp(46px, 6vw, 78px) 0; }
.hero-copy { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(280px,.65fr); gap: 28px; align-items: center; }
.eyebrow { margin: 0 0 10px; color: var(--primary); font-weight: 800; letter-spacing: .08em; font-size: 13px; }
h1, h2, h3 { margin-top: 0; color: var(--deep); line-height: 1.28; }
h1 { margin-bottom: 18px; font-size: clamp(34px, 5vw, 64px); letter-spacing: -.04em; }
h2 { margin-bottom: 14px; font-size: clamp(26px, 3.2vw, 42px); }
h3 { margin-bottom: 10px; font-size: clamp(18px, 2vw, 23px); }
p { margin-top: 0; }
.lead { color: #38546b; font-size: clamp(17px, 2vw, 21px); max-width: 760px; }
.hero-actions, .intro-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 24px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--blue); font-weight: 800; }
.text-link::after { content: "→"; }
.hero-note { padding: 24px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow); }
.hero-note strong { display: block; color: var(--deep); font-size: 20px; margin-bottom: 8px; }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.section-heading p:last-child { color: var(--muted); }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.card-grid.four { grid-template-columns: repeat(4, minmax(0,1fr)); }
.info-card { min-width: 0; padding: 24px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: 0 12px 36px rgba(22,136,216,.08); }
.info-card p { color: var(--muted); }
.product-strip { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.product-tile { overflow: hidden; border: 1px solid var(--border); border-radius: 22px; background: #fff; box-shadow: var(--shadow); }
.product-tile img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: #edf9ff; }
.product-tile .tile-copy { padding: 20px; }
.split-section { display: grid; grid-template-columns: minmax(0,1fr) minmax(320px,.9fr); gap: 34px; align-items: center; }
.split-section.reverse .split-media { order: -1; }
.split-media, .media-card { margin: 0; padding: 18px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.split-media img, .media-card img { width: 100%; max-height: 520px; object-fit: contain; border-radius: 18px; background: var(--soft); }
.feature-list { display: grid; gap: 14px; margin: 24px 0 0; padding: 0; list-style: none; }
.feature-list li { position: relative; padding-left: 28px; color: #38546b; }
.feature-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 900; }
.notice-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; }
.notice-card { padding: 26px; border-radius: var(--radius-md); background: linear-gradient(145deg,#fff,#eefaff); border: 1px solid var(--border); }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.review-card { margin: 0; padding: 24px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--border); box-shadow: 0 12px 36px rgba(22,136,216,.08); }
.review-card p { color: #38546b; }
.review-card footer { color: var(--blue); font-weight: 800; }
.faq-list { display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: 16px; background: #fff; overflow: hidden; }
.faq-item summary { cursor: pointer; list-style: none; padding: 18px 22px; color: var(--deep); font-weight: 800; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p { padding: 0 22px 20px; margin: 0; color: var(--muted); }
.page-intro { padding-top: clamp(42px, 6vw, 76px); }
.intro-grid { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(320px,.85fr); gap: 36px; align-items: center; }
.intro-copy h1 { font-size: clamp(34px, 4vw, 56px); }
.breadcrumb { width: min(100% - 32px, 1200px); margin: 24px auto 0; display: flex; gap: 10px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--blue); }
.compliance-panel { display: grid; grid-template-columns: minmax(260px,.8fr) minmax(0,1.2fr); gap: 28px; align-items: center; padding: 30px; border-radius: var(--radius-lg); border: 1px solid var(--border); background: #fff; box-shadow: var(--shadow); }
.service-steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.step-card { counter-increment: step; padding: 24px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--border); }
.step-card::before { content: counter(step, decimal-leading-zero); display: inline-flex; margin-bottom: 16px; color: var(--primary); font-size: 30px; font-weight: 900; }
.contact-panel { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.site-footer { padding: 58px 0 24px; background: var(--footer); color: #EAF8FF; }
.footer-grid { display: grid; grid-template-columns: 1.35fr repeat(3, minmax(0,1fr)); gap: 30px; }
.footer-brand img { width: 126px; height: 46px; object-fit: contain; margin-bottom: 16px; padding: 6px 10px; border-radius: 12px; background: #fff; }
.site-footer h2 { color: #fff; font-size: 18px; }
.site-footer a { display: block; width: fit-content; margin: 8px 0; color: #d8f2ff; }
.site-footer p { color: #c2e4f4; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 32px; padding-top: 20px; border-top: 1px solid rgba(234,248,255,.16); color: #c2e4f4; font-size: 14px; }
@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-inner { justify-content: space-between; }
}
@media (max-width: 900px) {
    :root { --header-h: 70px; }
    .carousel { aspect-ratio: 16 / 8.5; min-height: 250px; }
    .hero-copy, .intro-grid, .split-section, .compliance-panel { grid-template-columns: 1fr; }
    .split-section.reverse .split-media { order: initial; }
    .card-grid, .card-grid.four, .product-strip, .review-grid, .service-steps { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 620px) {
    .container, .header-inner, .carousel, .breadcrumb { width: min(100% - 24px, 1200px); }
    .header-register { padding-inline: 17px; }
    .brand-logo { width: 102px; }
    .carousel-wrap { padding-top: 12px; }
    .carousel { min-height: 210px; border-radius: 20px; aspect-ratio: 16 / 10; }
    .carousel-arrow { width: 38px; height: 38px; font-size: 22px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .card-grid, .card-grid.four, .product-strip, .review-grid, .notice-grid, .service-steps, .contact-panel, .footer-grid { grid-template-columns: 1fr; }
    .drawer-nav { grid-template-columns: 1fr; }
    .hero-actions, .intro-actions { align-items: stretch; }
    .hero-actions .main-btn, .intro-actions .main-btn { width: 100%; }
    .footer-bottom { flex-direction: column; }
    .section { padding: 50px 0; }
}