:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-strong: #1688D8;
    --deep-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 48px rgba(21, 90, 157, 0.10);
    --shadow-soft: 0 10px 30px rgba(21, 90, 157, 0.08);
    --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;
    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;
    padding-top: var(--header-height);
}
body.drawer-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--deep-blue);
    color: #fff;
}
.skip-link:focus { top: 12px; }

.section-shell { width: min(100% - 32px, 1180px); margin-inline: auto; }
.site-main { min-height: 60vh; }

.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);
    backdrop-filter: blur(18px);
    box-shadow: 0 8px 28px rgba(21, 90, 157, 0.07);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.5vw, 26px);
    min-width: 0;
}
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img { width: clamp(132px, 11vw, 176px); height: auto; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(6px, 0.66vw, 13px);
    overflow: hidden;
}
.desktop-nav a {
    flex: 0 0 auto;
    white-space: nowrap;
    font-size: clamp(12px, 0.86vw, 14px);
    color: #355268;
    padding: 8px 0;
    position: relative;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transition: 0.2s ease;
}
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--primary-strong); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { left: 0; right: 0; }
.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;
    color: #fff;
    font-weight: 700;
    white-space: nowrap;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    box-shadow: 0 10px 24px rgba(22, 136, 216, 0.22);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 14px 28px rgba(22, 136, 216, 0.28); }
.text-btn, .text-link {
    color: var(--primary-strong);
    font-weight: 700;
}
.text-btn:hover, .text-link:hover { text-decoration: underline; }

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-soft);
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--deep-blue); }
.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1090;
    opacity: 0;
    background: rgba(7, 58, 104, 0.42);
    transition: opacity 0.22s ease;
}
.drawer-backdrop.is-visible { opacity: 1; }
.mobile-drawer {
    position: fixed;
    z-index: 1100;
    top: 0;
    right: 0;
    width: min(88vw, 360px);
    height: 100dvh;
    padding: 22px;
    background: #fff;
    transform: translateX(105%);
    transition: transform 0.24s ease;
    overflow-y: auto;
    box-shadow: -20px 0 60px rgba(7, 58, 104, 0.22);
}
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.drawer-logo img { width: 150px; height: auto; }
.drawer-close { border: 0; background: var(--surface-soft); width: 42px; height: 42px; border-radius: 12px; color: var(--deep-blue); font-size: 28px; line-height: 1; }
.mobile-nav { display: grid; gap: 6px; }
.mobile-nav a { padding: 11px 14px; border-radius: 12px; color: #355268; white-space: nowrap; }
.mobile-nav a:hover, .mobile-nav a.is-active { background: var(--surface-soft); color: var(--primary-strong); }
.drawer-register { width: 100%; margin-top: 18px; }

.hero-carousel { padding: 28px 0 10px; }
.carousel {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #e5f7ff, #ffffff);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.carousel-track { position: relative; width: 100%; min-height: 250px; }
.carousel-slide { display: none; }
.carousel-slide.is-active { display: block; animation: fadeIn 0.45s ease; }
.carousel-slide img { width: 100%; height: auto; max-height: 520px; object-fit: contain; background: #eaf8ff; }
@keyframes fadeIn { from { opacity: 0.45; } to { opacity: 1; } }
.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 5;
    transform: translateY(-50%);
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,0.75);
    border-radius: 50%;
    background: rgba(7,58,104,0.50);
    color: #fff;
    font-size: 24px;
    display: grid;
    place-items: center;
}
.carousel-arrow:hover { background: rgba(7,58,104,0.76); }
.carousel-arrow.prev { left: 18px; }
.carousel-arrow.next { right: 18px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 5; transform: translateX(-50%); display: flex; gap: 8px; }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,0.72); box-shadow: 0 0 0 1px rgba(7,58,104,0.16); }
.carousel-dot.is-active { width: 28px; border-radius: 99px; background: var(--primary); }

.page-intro {
    margin-top: 34px;
    padding: clamp(28px, 5vw, 66px);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #ffffff 0%, #e7f8ff 100%);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    gap: clamp(26px, 5vw, 64px);
    align-items: center;
}
.page-intro--text { grid-template-columns: 1fr; }
.page-intro__copy h1 { margin: 12px 0 18px; font-size: clamp(34px, 5vw, 64px); line-height: 1.13; color: var(--deep-blue); letter-spacing: -0.03em; }
.page-intro__copy p { max-width: 760px; margin: 0; color: var(--muted); font-size: clamp(16px, 1.5vw, 19px); }
.page-intro__media { margin: 0; padding: 18px; border-radius: 24px; background: #fff; box-shadow: var(--shadow-soft); }
.page-intro__media img { width: 100%; max-height: 380px; object-fit: contain; border-radius: 18px; }
.intro-actions { display: flex; align-items: center; gap: 18px; margin-top: 26px; flex-wrap: wrap; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--primary-strong); font-weight: 800; letter-spacing: 0.08em; font-size: 13px; }
.eyebrow::before { content: ""; width: 22px; height: 3px; border-radius: 99px; background: var(--primary); }

.content-section, .media-section, .notice-panel { margin-top: clamp(52px, 7vw, 92px); }
.section-heading { max-width: 800px; margin-bottom: 30px; }
.section-heading h2, .media-section h2, .notice-panel h2 { margin: 10px 0 12px; color: var(--deep-blue); font-size: clamp(26px, 3.5vw, 42px); line-height: 1.25; }
.section-heading p, .media-section__copy > p { margin: 0; color: var(--muted); }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.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: var(--surface);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.info-card h3 { margin: 10px 0; color: var(--deep-blue); font-size: 20px; }
.info-card p { margin: 0 0 16px; color: var(--muted); }
.card-tag { display: inline-flex; padding: 4px 10px; border-radius: 999px; background: var(--surface-soft); color: var(--primary-strong); font-size: 12px; font-weight: 700; }

.media-section {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: clamp(28px, 5vw, 68px);
    align-items: center;
}
.media-section--reverse .media-section__visual { order: 2; }
.media-section__visual { margin: 0; min-width: 0; padding: 18px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.media-section__visual img { width: 100%; max-height: 440px; object-fit: contain; border-radius: 18px; }
.check-list { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 30px; color: #3d596f; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-soft); color: var(--primary-strong); font-weight: 900; font-size: 13px; }

.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.quick-card { padding: 22px; border-radius: 18px; background: linear-gradient(150deg, #fff, #edfaff); border: 1px solid var(--border); }
.quick-card h3 { margin: 0 0 8px; color: var(--deep-blue); }
.quick-card p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card { margin: 0; padding: 24px; border-radius: 20px; background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow-soft); }
.review-card p { margin: 0 0 16px; color: #36536a; }
.review-card footer { color: var(--primary-strong); font-weight: 800; }

.notice-panel {
    padding: clamp(26px, 4vw, 46px);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #e6f8ff 0%, #ffffff 100%);
    border: 1px solid var(--border);
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 32px;
    align-items: center;
}
.notice-panel__text p { margin: 0 0 10px; color: var(--muted); }

.faq-list { display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: 18px; background: #fff; overflow: hidden; box-shadow: var(--shadow-soft); }
.faq-item details { padding: 0; }
.faq-item summary { padding: 20px 24px; cursor: pointer; color: var(--deep-blue); font-weight: 800; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--primary-strong); font-size: 22px; }
.faq-item details[open] summary::after { content: "−"; }
.faq-item p { margin: 0; padding: 0 24px 22px; color: var(--muted); }

.link-band { margin-top: 52px; padding: 28px; border-radius: 22px; background: var(--deep-blue); color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.link-band h2 { margin: 0 0 6px; font-size: 24px; }
.link-band p { margin: 0; color: rgba(255,255,255,0.78); }
.link-band .main-btn { box-shadow: none; }

.site-footer { margin-top: clamp(70px, 9vw, 110px); background: var(--footer); color: var(--footer-text); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 38px; padding-top: 56px; padding-bottom: 40px; }
.footer-brand img { width: 168px; height: auto; padding: 8px 12px; border-radius: 14px; background: #fff; }
.footer-brand p { max-width: 470px; color: rgba(234,248,255,0.72); }
.footer-grid h2 { margin: 0 0 14px; font-size: 17px; }
.footer-grid > div:not(.footer-brand) { display: flex; flex-direction: column; gap: 8px; }
.footer-grid a { color: rgba(234,248,255,0.74); }
.footer-grid a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 18px; padding-bottom: 24px; border-top: 1px solid rgba(234,248,255,0.14); color: rgba(234,248,255,0.62); font-size: 13px; }
.footer-bottom p { margin: 0; }

@media (max-width: 1279px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: inline-block; }
    .header-inner { width: min(100% - 24px, 1180px); }
}

@media (max-width: 960px) {
    :root { --header-height: 70px; }
    .page-intro, .media-section, .notice-panel { grid-template-columns: 1fr; }
    .page-intro__media { max-width: 680px; }
    .media-section--reverse .media-section__visual { order: 0; }
    .card-grid, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .footer-grid > div:last-child { grid-column: 2 / 4; }
    .carousel-track { min-height: 190px; }
}

@media (max-width: 640px) {
    .section-shell { width: min(100% - 24px, 1180px); }
    .brand-logo img { width: 132px; }
    .header-actions .main-btn { min-height: 40px; padding: 8px 16px; }
    .hero-carousel { padding-top: 18px; }
    .carousel { border-radius: 20px; }
    .carousel-track { min-height: 140px; }
    .carousel-arrow { width: 38px; height: 38px; font-size: 20px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .page-intro { margin-top: 22px; padding: 26px 22px; border-radius: 22px; }
    .page-intro__copy h1 { font-size: 36px; }
    .card-grid, .review-grid, .quick-grid { grid-template-columns: 1fr; }
    .info-card, .quick-card, .review-card { padding: 20px; }
    .media-section__visual { padding: 12px; border-radius: 22px; }
    .notice-panel { padding: 24px; }
    .link-band { align-items: flex-start; flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 26px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: auto; }
    .footer-bottom { flex-direction: column; }
}