:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #11AEEA;
    --primary-strong: #1688D8;
    --deep: #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 45px rgba(22, 136, 216, 0.12);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --header-height: 78px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 0;
    overflow-x: hidden;
    color: var(--text);
    background: var(--bg);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
    line-height: 1.75;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 28px rgba(7, 58, 104, 0.07);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(calc(100% - 32px), 1360px);
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.3vw, 24px);
    min-width: 0;
}
.brand-logo { flex: 0 0 auto; display: flex; align-items: center; }
.brand-logo img { width: clamp(112px, 9vw, 150px); max-height: 48px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: clamp(5px, 0.55vw, 12px);
    white-space: nowrap;
}
.desktop-nav a {
    flex: 0 1 auto;
    padding: 9px clamp(5px, 0.5vw, 10px);
    border-radius: 999px;
    color: var(--deep);
    font-size: clamp(12px, 0.78vw, 14px);
    font-weight: 700;
    line-height: 1.2;
    transition: color .2s ease, background .2s ease, transform .2s ease;
}
.desktop-nav a:hover,
.desktop-nav a.active { color: var(--primary-strong); background: var(--soft); transform: translateY(-1px); }
.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: 0 22px;
    border: 0;
    border-radius: 999px;
    color: #fff;
    background: var(--gradient);
    box-shadow: 0 10px 24px rgba(22, 136, 216, 0.23);
    font-weight: 800;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(22, 136, 216, 0.3); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--soft);
    padding: 11px 10px;
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 99px; background: var(--deep); }

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(7, 58, 104, 0.36);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
}
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1200;
    width: min(88vw, 380px);
    height: 100dvh;
    padding: 20px;
    background: #fff;
    box-shadow: -24px 0 50px rgba(7, 58, 104, 0.18);
    transform: translateX(105%);
    transition: transform .28s ease;
    overflow-y: auto;
}
body.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.mobile-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 132px; max-height: 46px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 50%; color: var(--deep); background: var(--soft); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; gap: 7px; padding: 18px 0; }
.drawer-nav a { padding: 11px 14px; border-radius: 12px; color: var(--deep); font-weight: 700; }
.drawer-nav a.active, .drawer-nav a:hover { background: var(--soft); color: var(--primary-strong); }
.drawer-register { width: 100%; }

.site-main { padding-top: var(--header-height); }
.container { width: min(calc(100% - 32px), 1240px); margin-inline: auto; }
.section { padding: clamp(54px, 7vw, 96px) 0; }
.section.compact { padding: clamp(38px, 5vw, 72px) 0; }
.section-soft { background: var(--soft); }
.section-white { background: #fff; }
.section-head { max-width: 760px; margin-bottom: 30px; }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow { display: inline-flex; margin-bottom: 10px; color: var(--primary-strong); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
h1, h2, h3 { margin: 0; color: var(--deep); line-height: 1.28; }
h1 { font-size: clamp(32px, 5vw, 58px); }
h2 { font-size: clamp(26px, 3.2vw, 42px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
p { margin: 0; }
.lead { margin-top: 16px; color: var(--muted); font-size: clamp(16px, 1.6vw, 19px); }
.text-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--primary-strong); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.page-hero { position: relative; overflow: hidden; padding: clamp(64px, 9vw, 116px) 0; background: linear-gradient(145deg, #ffffff 0%, #e9f8ff 58%, #d9f3ff 100%); }
.page-hero::before, .page-hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.page-hero::before { width: 300px; height: 300px; top: -130px; right: 7%; background: rgba(53, 215, 255, .17); }
.page-hero::after { width: 210px; height: 210px; left: -90px; bottom: -110px; background: rgba(22, 136, 216, .12); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr); gap: clamp(34px, 6vw, 78px); align-items: center; }
.hero-copy .main-btn { margin-top: 26px; }
.hero-media { border-radius: var(--radius-lg); padding: 12px; background: rgba(255,255,255,.78); box-shadow: var(--shadow); }
.hero-media img { width: 100%; max-height: 470px; object-fit: contain; border-radius: 20px; background: #fff; }

.carousel-section { padding: clamp(18px, 2.6vw, 36px) 0 0; }
.carousel { position: relative; overflow: hidden; border-radius: clamp(18px, 3vw, 34px); background: #e8f7ff; box-shadow: var(--shadow); aspect-ratio: 16 / 5.2; min-height: 250px; }
.carousel-track { position: relative; width: 100%; height: 100%; }
.carousel-slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .55s ease, visibility .55s ease; }
.carousel-slide.active { opacity: 1; visibility: visible; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; background: #e8f7ff; }
.carousel-arrow { position: absolute; top: 50%; z-index: 3; transform: translateY(-50%); width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.6); border-radius: 50%; color: #fff; background: rgba(7,58,104,.55); font-size: 26px; line-height: 1; }
.carousel-arrow:hover { background: rgba(22,136,216,.8); }
.carousel-arrow.prev { left: 18px; }
.carousel-arrow.next { right: 18px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 4; 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,.64); box-shadow: 0 0 0 1px rgba(7,58,104,.18); }
.carousel-dot.active { width: 28px; border-radius: 999px; background: #fff; }

.intro-panel { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(280px, .82fr); gap: 28px; padding: clamp(26px, 4vw, 48px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.intro-points { display: grid; gap: 14px; }
.point-item { padding: 16px 18px; border-radius: var(--radius-sm); background: var(--soft); }
.point-item strong { display: block; color: var(--deep); }
.point-item span { color: var(--muted); font-size: 14px; }

.grid-2, .grid-3, .grid-4, .review-grid, .faq-grid { display: grid; gap: 22px; }
.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)); }
.review-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { min-width: 0; padding: 24px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: 0 13px 32px rgba(22,136,216,.08); }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); }
.card .tag { display: inline-flex; margin-bottom: 14px; padding: 5px 10px; border-radius: 999px; color: var(--primary-strong); background: var(--soft); font-size: 13px; font-weight: 800; }
.quick-card { display: flex; flex-direction: column; min-height: 210px; }
.quick-card .text-link { margin-top: auto; }
.feature-card { position: relative; overflow: hidden; }
.feature-card::after { content: ""; position: absolute; width: 100px; height: 100px; right: -34px; bottom: -45px; border-radius: 50%; background: rgba(53,215,255,.13); }

.media-split { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(30px, 5vw, 70px); align-items: center; }
.media-split.reverse { grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); }
.media-split.reverse .media-box { order: 2; }
.media-box { padding: 12px; border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.media-box img { width: 100%; max-height: 460px; object-fit: contain; border-radius: 20px; background: var(--soft); }
.content-stack { display: grid; gap: 18px; }
.content-stack p { color: var(--muted); }
.list-clean { display: grid; gap: 11px; margin: 0; padding: 0; list-style: none; }
.list-clean li { position: relative; padding-left: 20px; color: var(--muted); }
.list-clean li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }

.notice-bar { padding: 22px 24px; border-left: 4px solid var(--primary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: #fff; box-shadow: 0 10px 28px rgba(22,136,216,.08); }
.notice-bar strong { color: var(--deep); }
.notice-bar p { margin-top: 6px; color: var(--muted); }

.review-card { position: relative; padding-top: 34px; }
.review-card::before { content: "“"; position: absolute; top: 5px; left: 20px; color: rgba(17,174,234,.22); font-family: Georgia, serif; font-size: 64px; line-height: 1; }
.review-card p { position: relative; }
.review-card strong { display: block; margin-top: 15px; color: var(--primary-strong); }

.faq-item { padding: 22px 24px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.faq-item h3 { font-size: 19px; }
.faq-item p { margin-top: 10px; color: var(--muted); }

.steps { counter-reset: steps; display: grid; gap: 16px; }
.step { position: relative; padding: 20px 20px 20px 72px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.step::before { counter-increment: steps; content: counter(steps); position: absolute; left: 20px; top: 20px; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; color: #fff; background: var(--gradient); font-weight: 900; }
.step h3 { margin-bottom: 6px; font-size: 19px; }
.step p { color: var(--muted); }

.data-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.data-table { width: 100%; border-collapse: collapse; min-width: 680px; }
.data-table th, .data-table td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { color: var(--deep); background: var(--soft); }
.data-table td { color: var(--muted); }
.data-table tr:last-child td { border-bottom: 0; }

.cta-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: clamp(28px, 4vw, 48px); border-radius: var(--radius-lg); color: #fff; background: linear-gradient(135deg, #11AEEA 0%, #155A9D 100%); box-shadow: var(--shadow); }
.cta-panel h2, .cta-panel p { color: #fff; }
.cta-panel p { margin-top: 8px; opacity: .88; }
.cta-panel .main-btn { background: #fff; color: var(--primary-strong); box-shadow: none; }

.site-footer { color: var(--footer-text); background: var(--footer); }
.footer-inner { width: min(calc(100% - 32px), 1240px); margin: 0 auto; padding: 58px 0 36px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .8fr); gap: 60px; }
.footer-brand img { width: 150px; max-height: 52px; object-fit: contain; margin-bottom: 20px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 590px; color: rgba(234,248,255,.78); }
.footer-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.footer-links h2 { margin-bottom: 14px; color: #fff; font-size: 18px; }
.footer-links a { display: block; margin: 8px 0; color: rgba(234,248,255,.82); }
.footer-links a:hover { color: #fff; }
.footer-note { padding: 22px 16px 28px; text-align: center; border-top: 1px solid rgba(234,248,255,.14); }
.footer-note p { color: rgba(234,248,255,.72); font-size: 13px; }
.footer-note p + p { margin-top: 7px; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .header-inner { justify-content: space-between; }
    .menu-toggle { display: block; }
    .carousel { aspect-ratio: 16 / 6.5; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
    .hero-grid, .intro-panel, .media-split, .media-split.reverse, .footer-inner { grid-template-columns: 1fr; }
    .media-split.reverse .media-box { order: 0; }
    .grid-3, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-inner { gap: 34px; }
    .carousel { aspect-ratio: 16 / 8.2; }
}
@media (max-width: 680px) {
    :root { --header-height: 68px; }
    .header-inner, .container, .footer-inner { width: min(calc(100% - 24px), 1240px); }
    .brand-logo img { width: 106px; }
    .main-btn { min-height: 39px; padding-inline: 17px; }
    .menu-toggle { width: 40px; height: 40px; padding: 9px; }
    .carousel-section { padding-top: 12px; }
    .carousel { min-height: 220px; aspect-ratio: 4 / 3; border-radius: 18px; }
    .carousel-arrow { width: 38px; height: 38px; font-size: 22px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .grid-2, .grid-3, .grid-4, .review-grid, .faq-grid { grid-template-columns: 1fr; }
    .card { padding: 21px; }
    .quick-card { min-height: auto; }
    .cta-panel { align-items: flex-start; flex-direction: column; }
    .footer-links { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
    .header-inner { gap: 8px; }
    .header-actions { gap: 7px; }
    .header-actions .main-btn { padding-inline: 14px; font-size: 14px; }
    .brand-logo img { width: 96px; }
    .footer-links { grid-template-columns: 1fr; }
}