:root {
    --page-bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft-blue: #E8F7FF;
    --title: #11AEEA;
    --primary: #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 48px rgba(20, 112, 172, 0.12);
    --shadow-soft: 0 10px 30px rgba(20, 112, 172, 0.08);
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --header-height: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text);
    background:
        radial-gradient(circle at 10% 0%, rgba(53, 215, 255, 0.12), transparent 28%),
        radial-gradient(circle at 92% 18%, rgba(22, 136, 216, 0.08), transparent 24%),
        var(--page-bg);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
    line-height: 1.75;
    padding-top: var(--header-height);
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea { font: inherit; }

.skip-link {
    position: fixed;
    left: 18px;
    top: -80px;
    z-index: 3000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--footer);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-height);
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 28px rgba(21, 90, 157, 0.07);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(16px, 2vw, 30px);
}
.brand-logo, .drawer-logo { flex: 0 0 auto; }
.brand-logo img { width: clamp(118px, 10vw, 154px); max-height: 50px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(7px, 1.15vw, 18px);
    white-space: nowrap;
}
.desktop-nav a {
    position: relative;
    flex: 0 1 auto;
    padding: 8px 0;
    color: var(--deep-blue);
    font-size: clamp(12px, .94vw, 15px);
    font-weight: 700;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 1px;
    width: 0;
    height: 2px;
    border-radius: 999px;
    background: var(--gradient);
    transform: translateX(-50%);
    transition: width .2s ease;
}
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--title); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { width: 100%; }
.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, 0.24);
    font-weight: 800;
    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, 0.3); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.menu-toggle span { width: 21px; height: 2px; border-radius: 999px; background: var(--deep-blue); }

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(7, 58, 104, 0.42);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
}
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 1200;
    width: min(88vw, 390px);
    padding: 22px;
    background: #fff;
    box-shadow: -20px 0 50px rgba(7, 58, 104, 0.18);
    transform: translateX(105%);
    transition: transform .28s ease;
    overflow-y: auto;
}
.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 132px; max-height: 46px; object-fit: contain; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--soft-blue); color: var(--deep-blue); font-size: 28px; cursor: pointer; }
.mobile-nav { display: grid; gap: 6px; padding: 18px 0; }
.mobile-nav a { padding: 11px 14px; border-radius: 12px; color: var(--deep-blue); font-weight: 700; }
.mobile-nav a:hover, .mobile-nav a.is-active { color: var(--primary); background: var(--soft-blue); }
.drawer-register { width: 100%; }

.site-main { min-height: 60vh; }
.container { width: min(100% - 32px, 1240px); margin: 0 auto; }
.narrow { width: min(100% - 32px, 900px); margin: 0 auto; }
.section { padding: clamp(58px, 7vw, 96px) 0; }
.section-sm { padding: clamp(38px, 5vw, 64px) 0; }
.section-soft { background: linear-gradient(180deg, rgba(232, 247, 255, 0.92), rgba(244, 251, 255, 0.5)); }
.section-title { max-width: 760px; margin-bottom: 30px; }
.section-title.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 900;
    letter-spacing: .12em;
}
.eyebrow::before { content: ""; width: 28px; height: 3px; border-radius: 999px; background: var(--gradient); }
h1, h2, h3 { margin: 0; line-height: 1.28; color: var(--deep-blue); }
h1 { font-size: clamp(34px, 5vw, 64px); letter-spacing: -.04em; }
h2 { font-size: clamp(27px, 3.6vw, 42px); letter-spacing: -.025em; }
h3 { font-size: clamp(18px, 2.2vw, 23px); }
p { margin: 0; }
.lead { margin-top: 18px; color: var(--muted); font-size: clamp(16px, 1.7vw, 20px); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 15px; color: var(--primary); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.carousel-wrap { padding: 24px 0 0; }
.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--soft-blue);
    box-shadow: var(--shadow);
    aspect-ratio: 2.45 / 1;
}
.carousel-track { position: relative; width: 100%; height: 100%; }
.carousel-slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .55s ease; }
.carousel-slide.is-active { opacity: 1; visibility: visible; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; background: #eaf8ff; }
.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 5;
    width: 48px;
    height: 48px;
    border: 1px solid rgba(255,255,255,.75);
    border-radius: 50%;
    color: var(--deep-blue);
    background: rgba(255,255,255,.88);
    box-shadow: 0 10px 25px rgba(7,58,104,.15);
    transform: translateY(-50%);
    cursor: pointer;
}
.carousel-arrow.prev { left: 18px; }
.carousel-arrow.next { right: 18px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 6; display: flex; gap: 8px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.7); box-shadow: 0 0 0 1px rgba(21,90,157,.18); cursor: pointer; }
.carousel-dot.is-active { width: 28px; border-radius: 999px; background: var(--primary); }

.home-intro {
    width: min(100% - 32px, 1140px);
    margin: 28px auto 0;
    padding: clamp(26px, 4vw, 48px);
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: clamp(24px, 5vw, 64px);
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: rgba(255,255,255,.92);
    box-shadow: var(--shadow-soft);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 22px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--deep-blue);
    background: #fff;
    font-weight: 800;
}
.stat-panel { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.stat-card { padding: 20px; border-radius: var(--radius-md); background: var(--soft-blue); border: 1px solid var(--border); }
.stat-card strong { display: block; color: var(--primary); font-size: 24px; }
.stat-card span { color: var(--muted); font-size: 14px; }

.grid-2, .grid-3, .grid-4, .grid-5 { 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)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.card {
    height: 100%;
    padding: 26px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}
.card p { margin-top: 11px; color: var(--muted); }
.card-tag { display: inline-flex; margin-bottom: 14px; padding: 5px 10px; border-radius: 999px; color: var(--primary); background: var(--soft-blue); font-size: 13px; font-weight: 800; }
.quick-card { position: relative; overflow: hidden; transition: transform .2s ease, box-shadow .2s ease; }
.quick-card::before { content: ""; position: absolute; right: -26px; top: -26px; width: 90px; height: 90px; border-radius: 50%; background: rgba(53,215,255,.09); }
.quick-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }

.split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, .9fr);
    gap: clamp(28px, 6vw, 76px);
    align-items: center;
}
.split.reverse .media-panel { order: -1; }
.media-panel {
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: rgba(255,255,255,.9);
    box-shadow: var(--shadow);
}
.media-panel img { width: 100%; max-height: 500px; object-fit: contain; border-radius: calc(var(--radius-xl) - 10px); background: var(--soft-blue); }
.feature-list { display: grid; gap: 13px; margin: 24px 0 0; padding: 0; list-style: none; }
.feature-list li { position: relative; padding-left: 30px; color: var(--muted); }
.feature-list li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: var(--gradient); font-size: 12px; font-weight: 900; }

.notice-strip { padding: 22px 26px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(135deg, #eafaff, #fff); color: var(--deep-blue); box-shadow: var(--shadow-soft); }
.notice-strip strong { color: var(--primary); }
.review-card blockquote { margin: 0; color: var(--text); }
.review-card .reviewer { display: flex; align-items: center; gap: 10px; margin-top: 18px; color: var(--muted); font-size: 14px; }
.review-card .avatar { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--gradient); font-weight: 900; }

.faq-list { display: grid; gap: 13px; }
details { border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: 0 8px 24px rgba(20,112,172,.06); }
summary { position: relative; padding: 18px 48px 18px 20px; color: var(--deep-blue); font-weight: 800; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 20px; top: 50%; color: var(--primary); font-size: 24px; transform: translateY(-50%); }
details[open] summary::after { content: "−"; }
details p { padding: 0 20px 20px; color: var(--muted); }

.page-hero { padding: clamp(58px, 8vw, 100px) 0 clamp(46px, 6vw, 78px); }
.page-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
    align-items: center;
    gap: clamp(28px, 5vw, 64px);
    padding: clamp(30px, 5vw, 62px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, rgba(255,255,255,.98), rgba(232,247,255,.9));
    box-shadow: var(--shadow);
}
.page-hero.no-image .page-hero-inner { grid-template-columns: 1fr; }
.page-hero .hero-copy { max-width: 760px; }
.page-hero-image { padding: 16px; border-radius: var(--radius-lg); background: rgba(255,255,255,.8); border: 1px solid var(--border); }
.page-hero-image img { width: 100%; max-height: 390px; object-fit: contain; border-radius: 16px; background: var(--soft-blue); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--primary); }
.content-copy p + p { margin-top: 16px; }
.step-card { counter-increment: step; }
.steps { counter-reset: step; }
.step-card::before { content: counter(step, decimal-leading-zero); display: inline-flex; margin-bottom: 16px; color: var(--title); font-size: 28px; font-weight: 900; }
.rule-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.rule-list li { padding: 15px 18px; border-left: 4px solid var(--title); border-radius: 0 12px 12px 0; background: #fff; color: var(--muted); box-shadow: 0 7px 20px rgba(20,112,172,.06); }
.compliance-box { padding: clamp(25px, 4vw, 42px); border-radius: var(--radius-xl); background: var(--footer); color: var(--footer-text); box-shadow: var(--shadow); }
.compliance-box h2 { color: #fff; }
.compliance-box p { margin-top: 14px; color: rgba(234,248,255,.86); }

.site-footer { margin-top: 20px; background: var(--footer); color: var(--footer-text); }
.footer-inner { width: min(100% - 32px, 1240px); margin: 0 auto; padding: 54px 0 28px; }
.footer-brand { display: flex; align-items: center; gap: 18px; }
.footer-brand img { width: 132px; max-height: 48px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand strong { display: block; color: #fff; font-size: 24px; }
.footer-brand p { color: rgba(234,248,255,.75); }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 24px; margin: 28px 0; padding: 22px 0; border-top: 1px solid rgba(234,248,255,.13); border-bottom: 1px solid rgba(234,248,255,.13); }
.footer-links a { color: #fff; }
.footer-links a:hover { color: #75dcff; }
.footer-notice { display: grid; gap: 7px; color: rgba(234,248,255,.76); font-size: 14px; }
.copyright { margin-top: 22px; color: rgba(234,248,255,.55); font-size: 13px; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .header-inner { justify-content: space-between; }
    .menu-toggle { display: flex; }
}
@media (max-width: 980px) {
    .grid-4, .grid-5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .split, .page-hero-inner, .home-intro { grid-template-columns: 1fr; }
    .split.reverse .media-panel { order: 0; }
    .page-hero-image { max-width: 680px; }
}
@media (max-width: 700px) {
    :root { --header-height: 68px; --radius-xl: 22px; }
    .header-inner, .container, .narrow, .carousel, .home-intro { width: min(100% - 24px, 1240px); }
    .brand-logo img { width: 116px; }
    .header-actions .main-btn { min-height: 38px; padding: 0 16px; font-size: 14px; }
    .menu-toggle { width: 40px; height: 40px; }
    .carousel-wrap { padding-top: 14px; }
    .carousel { aspect-ratio: 1.72 / 1; }
    .carousel-arrow { width: 40px; height: 40px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .home-intro { padding: 24px; margin-top: 16px; }
    .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
    .card { padding: 22px; }
    .section { padding: 54px 0; }
    .page-hero { padding-top: 42px; }
    .page-hero-inner { padding: 26px 22px; }
    .stat-panel { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .main-btn, .hero-actions .secondary-btn { width: 100%; }
}
@media (max-width: 420px) {
    .header-inner { gap: 8px; }
    .header-actions { gap: 6px; }
    .header-actions .main-btn { padding: 0 13px; }
    .carousel { aspect-ratio: 1.42 / 1; }
    .carousel-arrow { width: 36px; height: 36px; }
}