:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #11AEEA;
    --primary-deep: #1688D8;
    --title: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 48px rgba(21, 90, 157, 0.10);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", 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; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(14px, 2vw, 30px);
}
.brand-logo { flex: 0 0 auto; width: clamp(108px, 10vw, 148px); }
.brand-logo img { width: 100%; height: 44px; object-fit: contain; object-position: left center; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(8px, 1.25vw, 22px);
    white-space: nowrap;
}
.desktop-nav a {
    position: relative;
    flex: 0 1 auto;
    color: #315269;
    font-size: clamp(13px, 0.95vw, 15px);
    font-weight: 700;
    padding: 26px 0 23px;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 15px;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    transition: left .2s ease, right .2s ease;
}
.desktop-nav a:hover, .desktop-nav a.active { color: var(--primary-deep); }
.desktop-nav a:hover::after, .desktop-nav a.active::after { left: 0; right: 0; }
.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: 44px;
    padding: 0 24px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 10px 26px rgba(22,136,216,.22);
    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,.28); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    cursor: pointer;
}
.menu-toggle span { display: block; width: 100%; height: 2px; margin: 5px 0; border-radius: 9px; background: var(--title); }

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1200;
    width: min(88vw, 380px);
    height: 100dvh;
    padding: 22px;
    background: #fff;
    box-shadow: -24px 0 60px rgba(7,58,104,.18);
    transform: translateX(102%);
    transition: transform .26s ease;
    overflow-y: auto;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(7,58,104,.38);
}
.drawer-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.drawer-head strong { color: var(--primary-deep); font-size: 26px; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 14px; background: var(--soft); color: var(--title); font-size: 28px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; gap: 7px; }
.drawer-nav a { padding: 12px 14px; border-radius: 12px; color: #315269; font-weight: 700; }
.drawer-nav a:hover, .drawer-nav a.active { background: var(--soft); color: var(--primary-deep); }
.drawer-register { width: 100%; margin-top: 18px; }

main { min-height: 60vh; }
.container { width: min(100% - 32px, 1200px); margin: 0 auto; }
.section { padding: clamp(54px, 7vw, 92px) 0; }
.section.soft { background: var(--soft); }
.section-title { max-width: 760px; margin: 0 auto 34px; text-align: center; }
.section-title.align-left { margin-left: 0; text-align: left; }
.eyebrow { display: inline-flex; margin-bottom: 12px; color: var(--primary-deep); font-weight: 800; letter-spacing: .08em; }
h1, h2, h3 { color: var(--title); line-height: 1.25; margin-top: 0; }
h1 { font-size: clamp(34px, 5vw, 62px); margin-bottom: 18px; }
h2 { font-size: clamp(27px, 3.4vw, 42px); margin-bottom: 16px; }
h3 { font-size: clamp(19px, 2vw, 24px); margin-bottom: 10px; }
p { margin: 0 0 16px; }
.lead { color: #3f6075; font-size: clamp(17px, 1.6vw, 20px); }
.muted { color: var(--muted); }
.text-link { color: var(--primary-deep); font-weight: 800; }
.text-link:hover { text-decoration: underline; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--primary-deep); font-weight: 800; }

.carousel-wrap { padding: 24px 0 0; }
.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin: 0 auto;
    aspect-ratio: 16 / 6.2;
    min-height: 260px;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: #dff5ff;
    box-shadow: var(--shadow);
}
.carousel-track { position: relative; width: 100%; height: 100%; }
.carousel-slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .55s ease; }
.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;
    top: 50%;
    z-index: 3;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 50%;
    background: rgba(7,58,104,.46);
    color: #fff;
    font-size: 28px;
    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: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); cursor: pointer; }
.carousel-dot.active { width: 28px; border-radius: 999px; background: #fff; }

.home-intro { padding-top: clamp(56px, 7vw, 90px); }
.intro-panel, .page-hero-card {
    padding: clamp(28px, 5vw, 62px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #eefaff 100%);
    box-shadow: var(--shadow);
}
.intro-grid, .split-grid, .hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(28px, 5vw, 70px); align-items: center; }
.stat-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.stat-card { padding: 20px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.stat-card strong { display: block; margin-bottom: 6px; color: var(--primary-deep); font-size: 22px; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.card-grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.card-grid.four { grid-template-columns: repeat(4, minmax(0,1fr)); }
.info-card, .category-card, .review-card, .faq-card, .notice-card {
    min-width: 0;
    padding: 26px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: 0 12px 34px rgba(21,90,157,.07);
}
.info-card p, .category-card p, .review-card p { color: var(--muted); }
.category-card { display: flex; flex-direction: column; }
.category-card .text-link { margin-top: auto; padding-top: 8px; }
.icon-badge { width: 50px; height: 50px; margin-bottom: 16px; border-radius: 16px; background: linear-gradient(135deg, rgba(53,215,255,.28), rgba(22,136,216,.14)); display: grid; place-items: center; color: var(--primary-deep); font-size: 22px; font-weight: 900; }

.image-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.image-card img { width: 100%; max-height: 520px; object-fit: contain; background: #fff; }
.image-card figcaption { padding: 18px 22px; color: var(--muted); }
.media-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.media-item { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.media-item img { width: 100%; height: 280px; object-fit: contain; background: #fff; }
.media-item .media-copy { padding: 22px; }

.steps { counter-reset: step; display: grid; gap: 16px; }
.step { position: relative; padding: 22px 22px 22px 76px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 22px; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; background: linear-gradient(135deg, #35D7FF, #1688D8); color: #fff; font-weight: 900; }

.review-card blockquote { margin: 0; }
.review-card footer { margin-top: 16px; color: var(--primary-deep); font-weight: 800; }
.notice-box { padding: 28px; border: 1px solid var(--border); border-left: 5px solid var(--primary); border-radius: var(--radius-md); background: #fff; }
.notice-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.notice-list li { position: relative; padding-left: 28px; color: #456276; }
.notice-list li::before { content: "✓"; position: absolute; left: 0; color: var(--primary-deep); font-weight: 900; }

.page-hero { padding: clamp(42px, 6vw, 76px) 0 24px; }
.page-hero-card { position: relative; overflow: hidden; }
.page-hero-card::after { content: ""; position: absolute; width: 280px; height: 280px; right: -90px; bottom: -120px; border-radius: 50%; background: radial-gradient(circle, rgba(53,215,255,.28), rgba(53,215,255,0)); }
.page-hero-copy { position: relative; z-index: 1; max-width: 760px; }
.breadcrumb { margin-bottom: 14px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--primary-deep); }

.accordion { display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; overflow: hidden; }
.faq-question { width: 100%; padding: 20px 22px; border: 0; background: #fff; color: var(--title); font-weight: 800; text-align: left; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; }
.faq-answer { padding: 0 22px 22px; color: var(--muted); }
.faq-item:not(.open) .faq-answer { display: none; }
.faq-question span:last-child { color: var(--primary-deep); }

.contact-grid { display: grid; grid-template-columns: .88fr 1.12fr; gap: 24px; }
.contact-form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.field { display: grid; gap: 8px; }
.field label { color: var(--title); font-weight: 800; }
.field input, .field textarea, .field select { width: 100%; border: 1px solid var(--border); border-radius: 14px; padding: 13px 14px; background: #fff; color: var(--text); outline: none; }
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(17,174,234,.10); }

.site-footer { margin-top: 40px; background: var(--footer); color: var(--footer-text); }
.footer-inner { width: min(100% - 32px, 1200px); margin: 0 auto; padding: 56px 0 38px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 70px; }
.footer-wordmark { margin-bottom: 14px; color: #fff; font-size: 34px; font-weight: 900; }
.footer-brand p { max-width: 620px; color: #cdefff; }
.footer-links { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 32px; }
.footer-links h2 { margin-bottom: 14px; color: #fff; font-size: 18px; }
.footer-links a { display: block; margin: 9px 0; color: #cdefff; }
.footer-links a:hover { color: #fff; }
.footer-notice { border-top: 1px solid rgba(255,255,255,.14); padding: 22px max(16px, calc((100% - 1200px)/2)); color: #cdefff; font-size: 14px; }
.footer-notice p:last-child { margin-bottom: 0; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-inner { min-height: 68px; }
    .brand-logo { margin-right: auto; }
}
@media (max-width: 980px) {
    .intro-grid, .split-grid, .hero-grid, .contact-grid, .footer-inner { grid-template-columns: 1fr; }
    .card-grid, .card-grid.four { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-inner { gap: 34px; }
    .carousel { aspect-ratio: 16 / 8; }
}
@media (max-width: 720px) {
    .container, .header-inner, .carousel { width: min(100% - 24px, 1200px); }
    .header-actions .main-btn { min-height: 40px; padding: 0 17px; }
    .brand-logo { width: 108px; }
    .card-grid, .card-grid.two, .card-grid.four, .media-grid, .stat-grid, .form-row, .footer-links { grid-template-columns: 1fr; }
    .carousel { min-height: 220px; aspect-ratio: 4 / 3; border-radius: 20px; }
    .carousel-arrow { width: 40px; height: 40px; font-size: 24px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .intro-panel, .page-hero-card { padding: 26px 22px; }
    .info-card, .category-card, .review-card, .faq-card, .notice-card { padding: 22px; }
    .section { padding: 52px 0; }
    .media-item img { height: 230px; }
}
@media (max-width: 420px) {
    .header-inner { gap: 8px; }
    .brand-logo { width: 94px; }
    .header-actions { gap: 7px; }
    .header-actions .main-btn { padding: 0 14px; }
    .menu-toggle { width: 40px; height: 40px; }
    .carousel { min-height: 190px; }
}