:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-deep: #1688D8;
    --heading: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073A68;
    --shadow: 0 18px 48px rgba(21, 90, 157, 0.11);
    --shadow-soft: 0 10px 28px rgba(21, 90, 157, 0.08);
    --radius: 22px;
    --radius-sm: 14px;
    --container: min(100% - 32px, 1240px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    padding-top: 76px;
    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 { max-width: 100%; }
button, input, textarea, select { font: inherit; }

.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--primary-deep);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 10px; }

.container { width: var(--container); margin-inline: auto; }
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: 76px;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 8px 24px rgba(21, 90, 157, 0.07);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(10px, 1.2vw, 22px);
}
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img { display: block; width: clamp(100px, 9vw, 138px); max-height: 48px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(3px, .48vw, 9px);
    white-space: nowrap;
}
.desktop-nav a {
    position: relative;
    flex: 0 1 auto;
    padding: 9px clamp(3px, .35vw, 7px);
    border-radius: 10px;
    color: #35566F;
    font-size: clamp(11px, .78vw, 13.5px);
    line-height: 1;
    transition: color .2s ease, background .2s ease;
}
.desktop-nav a:hover,
.desktop-nav a.active { color: var(--primary-deep); background: var(--soft); }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.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%);
    box-shadow: 0 10px 24px rgba(22, 136, 216, .25);
    color: #fff;
    font-weight: 700;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22, 136, 216, .32); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    cursor: pointer;
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--heading); }
.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1090;
    background: rgba(7, 58, 104, .38);
    opacity: 0;
    transition: opacity .22s ease;
}
.drawer-overlay.show { opacity: 1; }
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1100;
    width: min(86vw, 380px);
    height: 100dvh;
    padding: 18px;
    overflow-y: auto;
    background: #fff;
    box-shadow: -18px 0 40px rgba(7, 58, 104, .16);
    transform: translateX(105%);
    transition: transform .24s ease;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo img { display: block; width: 124px; max-height: 46px; object-fit: contain; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--soft); color: var(--heading); font-size: 28px; cursor: pointer; }
.mobile-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; padding: 18px 0; }
.mobile-nav a { padding: 11px 12px; border: 1px solid var(--border); border-radius: 12px; color: var(--text); background: #fff; text-align: center; }
.mobile-nav a.active, .mobile-nav a:hover { border-color: rgba(16,174,234,.38); background: var(--soft); color: var(--primary-deep); }
.drawer-register { width: 100%; }

main { min-height: 60vh; }
.hero-carousel-section { padding: 24px 0 22px; }
.carousel {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 26px;
    background: #fff;
    box-shadow: var(--shadow);
}
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.2,.65,.3,1); }
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-slide img { display: block; width: 100%; aspect-ratio: 16 / 5.2; object-fit: contain; background: #fff; }
.carousel-control {
    position: absolute;
    top: 50%;
    z-index: 3;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.78);
    border-radius: 50%;
    background: rgba(7, 58, 104, .42);
    color: #fff;
    font-size: 26px;
    cursor: pointer;
    transform: translateY(-50%);
    backdrop-filter: blur(6px);
}
.carousel-control.prev { left: 16px; }
.carousel-control.next { right: 16px; }
.carousel-dots { position: absolute; left: 50%; bottom: 14px; z-index: 3; display: flex; gap: 8px; transform: translateX(-50%); }
.carousel-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.65); box-shadow: 0 0 0 1px rgba(7,58,104,.18); cursor: pointer; }
.carousel-dot.active { width: 25px; border-radius: 99px; background: #fff; }

.page-hero { padding: clamp(58px, 8vw, 96px) 0 clamp(40px, 6vw, 72px); background: linear-gradient(180deg, #E8F7FF 0%, #F4FBFF 100%); }
.page-hero .eyebrow, .section-heading .eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--primary-deep); font-weight: 700; letter-spacing: .08em; }
.page-hero h1 { max-width: 920px; margin: 0; color: var(--heading); font-size: clamp(34px, 5vw, 64px); line-height: 1.15; }
.page-hero p { max-width: 820px; margin: 20px 0 0; color: var(--muted); font-size: clamp(16px, 1.8vw, 20px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--primary-deep); font-weight: 700; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 10px 20px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--primary-deep); font-weight: 700; }

.section { padding: clamp(54px, 7vw, 88px) 0; }
.section.soft { background: var(--soft); }
.section.compact { padding: 42px 0; }
.section-heading { max-width: 790px; margin-bottom: 28px; }
.section-heading.center { margin-inline: auto; text-align: center; }
.section-heading h2 { margin: 0 0 12px; color: var(--heading); font-size: clamp(28px, 4vw, 44px); line-height: 1.25; }
.section-heading p { margin: 0; color: var(--muted); font-size: 17px; }
.lead { font-size: clamp(17px, 1.8vw, 20px); color: #35566F; }
.prose { max-width: 880px; }
.prose p { margin: 0 0 18px; }

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
    height: 100%;
    padding: clamp(20px, 2.6vw, 30px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}
.card h3 { margin: 0 0 10px; color: var(--heading); font-size: 21px; line-height: 1.35; }
.card p { margin: 0 0 14px; color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
.card-tag { display: inline-flex; margin-bottom: 14px; padding: 5px 10px; border-radius: 999px; background: var(--soft); color: var(--primary-deep); font-size: 13px; font-weight: 700; }
.quick-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.quick-card { display: flex; flex-direction: column; }
.quick-card .text-link { margin-top: auto; }
.split { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); align-items: center; gap: clamp(28px, 5vw, 64px); }
.split.reverse .split-media { order: -1; }
.split-copy h2 { margin: 0 0 16px; color: var(--heading); font-size: clamp(28px, 4vw, 44px); line-height: 1.25; }
.split-copy p { margin: 0 0 16px; color: var(--muted); }
.split-media { overflow: hidden; border: 1px solid var(--border); border-radius: 24px; background: #fff; box-shadow: var(--shadow); }
.split-media img, .media-card img { display: block; width: 100%; max-height: 440px; object-fit: contain; background: #fff; }
.media-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow-soft); }
.media-card-body { padding: 20px; }
.media-card h3 { margin: 0 0 8px; color: var(--heading); }
.media-card p { margin: 0; color: var(--muted); }
.list { margin: 16px 0 0; padding: 0; list-style: none; }
.list li { position: relative; margin: 10px 0; padding-left: 24px; color: var(--text); }
.list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 9px; height: 9px; border-radius: 50%; background: linear-gradient(135deg, #35D7FF, #1688D8); transform: translateY(-50%); }
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.step { position: relative; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow-soft); }
.step::before { counter-increment: step; content: counter(step); display: inline-flex; width: 36px; height: 36px; align-items: center; justify-content: center; margin-bottom: 16px; border-radius: 12px; background: var(--soft); color: var(--primary-deep); font-weight: 800; }
.step h3 { margin: 0 0 8px; color: var(--heading); }
.step p { margin: 0; color: var(--muted); }
.notice { padding: clamp(24px, 4vw, 38px); border: 1px solid rgba(16,174,234,.24); border-radius: 24px; background: linear-gradient(135deg, rgba(53,215,255,.1), rgba(22,136,216,.08)); }
.notice h2, .notice h3 { margin: 0 0 10px; color: var(--heading); }
.notice p { margin: 0; color: #47677E; }
.feedback-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.feedback { position: relative; padding: 26px; border: 1px solid var(--border); border-radius: 20px; background: #fff; box-shadow: var(--shadow-soft); }
.feedback::before { content: "“"; position: absolute; right: 18px; top: 4px; color: rgba(16,174,234,.16); font-size: 64px; line-height: 1; }
.feedback p { position: relative; margin: 0 0 14px; color: #38556A; }
.feedback strong { color: var(--primary-deep); }
.faq-list { display: grid; gap: 14px; }
details { border: 1px solid var(--border); border-radius: 16px; background: #fff; box-shadow: var(--shadow-soft); }
summary { position: relative; padding: 19px 54px 19px 22px; color: var(--heading); font-weight: 700; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 22px; top: 50%; color: var(--primary-deep); font-size: 24px; transform: translateY(-50%); }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 22px 22px; color: var(--muted); }
.cta-band { padding: clamp(30px, 5vw, 48px); border-radius: 28px; background: linear-gradient(135deg, #0EAEE8, #155A9D); color: #fff; box-shadow: 0 22px 50px rgba(21,90,157,.2); }
.cta-band h2 { margin: 0 0 10px; font-size: clamp(28px, 4vw, 42px); }
.cta-band p { max-width: 760px; margin: 0 0 22px; color: rgba(255,255,255,.86); }
.cta-band .secondary-btn { border-color: rgba(255,255,255,.45); background: rgba(255,255,255,.12); color: #fff; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 18px; background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { padding: 16px 18px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--heading); background: var(--soft); }
tr:last-child td { border-bottom: 0; }

.site-footer { margin-top: 0; padding: 56px 0 26px; background: var(--footer); color: #EAF8FF; }
.footer-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 42px; }
.footer-brand img { display: block; width: 142px; max-height: 50px; object-fit: contain; margin-bottom: 18px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 500px; margin: 0; color: rgba(234,248,255,.76); }
.site-footer h2 { margin: 0 0 16px; color: #fff; font-size: 17px; }
.footer-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px 14px; }
.footer-links a { color: rgba(234,248,255,.78); }
.footer-links a:hover { color: #fff; }
.footer-notice { margin-top: 38px; padding-top: 24px; border-top: 1px solid rgba(234,248,255,.16); color: rgba(234,248,255,.68); font-size: 14px; }
.footer-notice p { margin: 8px 0; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .header-inner { justify-content: space-between; }
    .menu-toggle { display: block; }
}
@media (max-width: 980px) {
    .quick-grid, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3, .feedback-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .split { grid-template-columns: 1fr; }
    .split.reverse .split-media { order: initial; }
    .steps { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 700px) {
    body { padding-top: 68px; }
    .site-header { height: 68px; }
    .header-inner { width: min(100% - 22px, 1360px); }
    .brand-logo img { width: 104px; }
    .header-actions .main-btn { min-height: 38px; padding: 8px 16px; font-size: 14px; }
    .menu-toggle { width: 40px; height: 40px; }
    .hero-carousel-section { padding-top: 14px; }
    .carousel { border-radius: 18px; }
    .carousel-slide img { aspect-ratio: 16 / 8.3; }
    .carousel-control { width: 38px; height: 38px; font-size: 22px; }
    .carousel-control.prev { left: 8px; }
    .carousel-control.next { right: 8px; }
    .carousel-dots { bottom: 9px; }
    .page-hero { padding-top: 48px; }
    .grid-2, .grid-3, .grid-4, .quick-grid, .feedback-grid { grid-template-columns: 1fr; }
    .card, .feedback, .step { padding: 22px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-brand { grid-column: auto; }
    .mobile-nav { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
    .header-inner { gap: 8px; }
    .header-actions { gap: 6px; }
    .header-actions .main-btn { padding-inline: 14px; }
    .mobile-nav { grid-template-columns: 1fr; }
    .carousel-control { width: 34px; height: 34px; }
}