:root {
    --bg: #f4fbff;
    --surface: #ffffff;
    --surface-soft: #e8f7ff;
    --primary: #10aeea;
    --primary-strong: #1688d8;
    --deep: #155a9d;
    --text: #24384a;
    --muted: #60758a;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073a68;
    --shadow: 0 18px 50px rgba(23, 112, 173, 0.12);
    --shadow-sm: 0 10px 28px rgba(23, 112, 173, 0.09);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --container: min(100% - 32px, 1200px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    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;
}
body.drawer-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--deep);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.4vw, 24px);
}
.brand-logo { flex: 0 0 auto; width: clamp(118px, 10vw, 154px); }
.brand-logo img { width: 100%; height: 46px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(7px, .75vw, 14px);
    white-space: nowrap;
}
.desktop-nav a {
    position: relative;
    padding: 24px 0 22px;
    color: var(--text);
    font-size: clamp(12px, .92vw, 15px);
    font-weight: 650;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 16px;
    width: 0;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(135deg, #35d7ff 0%, #1688d8 100%);
    transform: translateX(-50%);
    transition: width .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 { width: 18px; }
.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;
    background: linear-gradient(135deg, #35d7ff 0%, #1688d8 100%);
    box-shadow: 0 10px 24px rgba(22,136,216,.24);
    color: #fff;
    font-weight: 750;
    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,.3); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 13px;
    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); }

.mobile-drawer {
    position: fixed;
    z-index: 1200;
    top: 0;
    right: 0;
    width: min(88vw, 390px);
    height: 100dvh;
    padding: 22px;
    overflow-y: auto;
    background: #fff;
    box-shadow: -20px 0 60px rgba(7,58,104,.18);
    transform: translateX(104%);
    transition: transform .24s ease;
}
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(7,58,104,.38);
    opacity: 0;
    transition: opacity .22s ease;
}
.drawer-backdrop.is-visible { opacity: 1; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo { width: 144px; }
.drawer-logo img { width: 100%; height: 45px; object-fit: contain; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--deep); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 18px 0; }
.drawer-nav a { padding: 11px 12px; border-radius: 11px; background: var(--bg); color: var(--text); font-weight: 650; }
.drawer-nav a:hover, .drawer-nav a.is-active { background: var(--surface-soft); color: var(--primary-strong); }
.drawer-register { width: 100%; }

main { min-height: 60vh; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(62px, 8vw, 104px) 0; }
.section--soft { background: var(--surface-soft); }
.section--white { background: #fff; }
.section--compact { padding: clamp(46px, 6vw, 76px) 0; }
.section-heading { max-width: 760px; margin-bottom: clamp(28px, 4vw, 44px); }
.section-heading--center { margin-inline: auto; text-align: center; }
.section-kicker { display: inline-flex; align-items: center; gap: 8px; color: var(--primary-strong); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
.section-kicker::before { content: ""; width: 24px; height: 3px; border-radius: 999px; background: linear-gradient(135deg, #35d7ff, #1688d8); }
.section-heading h2 { margin: 10px 0 12px; color: var(--deep); font-size: clamp(28px, 4vw, 46px); line-height: 1.22; }
.section-heading p { margin: 0; color: var(--muted); font-size: clamp(15px, 1.7vw, 18px); }

.page-hero { position: relative; overflow: hidden; padding: clamp(70px, 9vw, 120px) 0; background: linear-gradient(135deg, #e9f8ff 0%, #f8fdff 58%, #e2f5ff 100%); }
.page-hero::before, .page-hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.page-hero::before { width: 320px; height: 320px; right: -90px; top: -120px; background: rgba(53,215,255,.2); }
.page-hero::after { width: 220px; height: 220px; left: -70px; bottom: -100px; background: rgba(22,136,216,.12); }
.page-hero__inner { position: relative; z-index: 1; width: var(--container); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); gap: clamp(34px, 6vw, 84px); align-items: center; }
.page-hero__content h1 { margin: 12px 0 18px; color: var(--deep); font-size: clamp(38px, 6vw, 66px); line-height: 1.12; }
.page-hero__content p { max-width: 680px; margin: 0; color: var(--muted); font-size: clamp(16px, 2vw, 20px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 20px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--deep); font-weight: 750; }
.page-hero__image { padding: clamp(16px, 2.2vw, 24px); border: 1px solid var(--border); border-radius: var(--radius-xl); background: rgba(255,255,255,.82); box-shadow: var(--shadow); }
.page-hero__image img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; border-radius: calc(var(--radius-xl) - 10px); }
.hero-facts { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; margin-top: 28px; }
.hero-fact { padding: 16px; border: 1px solid var(--border); border-radius: var(--radius-md); background: rgba(255,255,255,.72); }
.hero-fact strong { display: block; color: var(--deep); font-size: 17px; }
.hero-fact span { color: var(--muted); font-size: 13px; }

.carousel-shell { width: min(100% - 32px, 1360px); margin: clamp(22px, 3vw, 38px) auto 0; }
.carousel { position: relative; overflow: hidden; border-radius: clamp(18px, 3vw, 32px); background: var(--surface-soft); box-shadow: var(--shadow); }
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-slide img { width: 100%; height: clamp(220px, 42vw, 600px); object-fit: contain; background: #edf9ff; }
.carousel-arrow { position: absolute; top: 50%; z-index: 2; width: clamp(40px, 5vw, 54px); height: clamp(40px, 5vw, 54px); border: 1px solid rgba(255,255,255,.64); border-radius: 50%; background: rgba(7,58,104,.5); color: #fff; font-size: 28px; cursor: pointer; transform: translateY(-50%); backdrop-filter: blur(8px); }
.carousel-arrow:hover { background: rgba(22,136,216,.82); }
.carousel-arrow.prev { left: clamp(10px, 2vw, 24px); }
.carousel-arrow.next { right: clamp(10px, 2vw, 24px); }
.carousel-dots { position: absolute; z-index: 2; left: 50%; bottom: clamp(12px, 2vw, 22px); 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,.68); cursor: pointer; transition: width .2s ease, border-radius .2s ease, background .2s ease; }
.carousel-dot.is-active { width: 26px; border-radius: 999px; background: #fff; }

.intro-panel { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr); gap: 28px; padding: clamp(28px, 5vw, 56px); border: 1px solid var(--border); border-radius: var(--radius-xl); background: #fff; box-shadow: var(--shadow-sm); }
.intro-panel h1 { margin: 8px 0 16px; color: var(--deep); font-size: clamp(36px, 5vw, 58px); line-height: 1.15; }
.intro-panel p { margin: 0 0 14px; color: var(--muted); }
.intro-aside { display: grid; gap: 12px; }
.intro-point { padding: 18px; border-radius: var(--radius-md); background: var(--surface-soft); }
.intro-point strong { display: block; margin-bottom: 4px; color: var(--deep); }
.intro-point span { color: var(--muted); font-size: 14px; }

.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 { display: flex; min-width: 0; flex-direction: column; padding: clamp(22px, 3vw, 30px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease; }
.info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-tag { display: inline-flex; align-self: flex-start; margin-bottom: 12px; padding: 5px 10px; border-radius: 999px; background: var(--surface-soft); color: var(--primary-strong); font-size: 12px; font-weight: 800; }
.info-card h3, .media-card h3 { margin: 0 0 10px; color: var(--deep); font-size: 21px; line-height: 1.35; }
.info-card p, .media-card p { margin: 0 0 18px; color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: auto; color: var(--primary-strong); font-weight: 800; }
.text-link span { transition: transform .2s ease; }
.text-link:hover span { transform: translateX(4px); }

.media-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.media-grid--two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.media-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.media-card__image { display: grid; place-items: center; min-height: 210px; padding: 18px; background: linear-gradient(145deg, #effaff, #ffffff); }
.media-card__image img { width: 100%; height: 230px; object-fit: contain; }
.media-card__body { display: flex; min-height: 230px; flex-direction: column; padding: 24px; }

.split-panel { display: grid; grid-template-columns: minmax(0,.95fr) minmax(0,1.05fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
.split-panel--reverse .split-image { order: 2; }
.split-image { padding: 20px; border: 1px solid var(--border); border-radius: var(--radius-xl); background: #fff; box-shadow: var(--shadow-sm); }
.split-image img { width: 100%; max-height: 430px; object-fit: contain; border-radius: calc(var(--radius-xl) - 10px); }
.split-content h2 { margin: 8px 0 16px; color: var(--deep); font-size: clamp(28px, 4vw, 44px); line-height: 1.22; }
.split-content p { margin: 0 0 16px; color: var(--muted); }
.check-list { display: grid; gap: 10px; padding: 0; margin: 22px 0 0; list-style: none; }
.check-list li { position: relative; padding-left: 30px; color: var(--text); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 2px; display: grid; place-items: center; width: 21px; height: 21px; border-radius: 50%; background: var(--surface-soft); color: var(--primary-strong); font-size: 13px; font-weight: 900; }

.timeline { display: grid; gap: 14px; counter-reset: step; }
.timeline-item { position: relative; padding: 22px 22px 22px 74px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); counter-increment: step; }
.timeline-item::before { content: counter(step, decimal-leading-zero); position: absolute; left: 20px; top: 20px; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; background: var(--surface-soft); color: var(--primary-strong); font-weight: 900; }
.timeline-item h3 { margin: 0 0 6px; color: var(--deep); }
.timeline-item p { margin: 0; color: var(--muted); }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.review-card { position: relative; margin: 0; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.review-mark { position: absolute; right: 20px; top: 10px; color: rgba(16,174,234,.2); font-family: Georgia, serif; font-size: 64px; line-height: 1; }
.review-card p { position: relative; margin: 0 0 24px; color: var(--text); }
.review-card footer { display: flex; flex-direction: column; gap: 1px; }
.review-card strong { color: var(--deep); }
.review-card span { color: var(--muted); font-size: 13px; }

.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-sm); }
.faq-item summary { position: relative; padding: 19px 52px 19px 22px; color: var(--deep); font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 20px; top: 50%; color: var(--primary-strong); font-size: 25px; transform: translateY(-50%); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin: 0; padding: 0 22px 22px; color: var(--muted); }

.notice-panel { display: grid; grid-template-columns: auto 1fr; gap: 22px; align-items: start; padding: clamp(24px, 4vw, 38px); border: 1px solid var(--border); border-radius: var(--radius-xl); background: linear-gradient(135deg, #e8f7ff, #ffffff); box-shadow: var(--shadow-sm); }
.notice-panel--compact { border-radius: var(--radius-lg); }
.notice-icon { display: grid; place-items: center; width: 60px; height: 60px; border-radius: 18px; background: linear-gradient(135deg, #35d7ff, #1688d8); color: #fff; font-size: 19px; font-weight: 900; }
.notice-panel h2 { margin: 0 0 8px; color: var(--deep); font-size: clamp(22px, 3vw, 30px); }
.notice-panel p { margin: 0; color: var(--muted); }

.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.contact-card { padding: 28px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.contact-card h3 { margin: 0 0 10px; color: var(--deep); }
.contact-card p { margin: 0; color: var(--muted); }

.site-footer { background: var(--footer); color: #eaf8ff; }
.footer-inner { width: var(--container); margin: 0 auto; display: grid; grid-template-columns: minmax(260px, 1.6fr) repeat(3, minmax(150px, .7fr)); gap: 40px; padding: 62px 0 48px; }
.footer-logo { display: inline-block; width: 150px; padding: 7px 12px; border-radius: 12px; background: #fff; }
.footer-logo img { width: 100%; height: 44px; object-fit: contain; }
.footer-brand p { max-width: 470px; margin: 18px 0 0; color: rgba(234,248,255,.78); }
.footer-column h2 { margin: 0 0 16px; color: #fff; font-size: 17px; }
.footer-column a { display: block; margin: 9px 0; color: rgba(234,248,255,.78); }
.footer-column a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(234,248,255,.14); }
.footer-bottom p { width: var(--container); margin: 0 auto; padding: 18px 0; color: rgba(234,248,255,.68); font-size: 13px; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .header-inner { min-height: 70px; }
    .brand-logo { margin-right: auto; }
    .menu-toggle { display: flex; }
}

@media (max-width: 900px) {
    .page-hero__inner, .intro-panel, .split-panel { grid-template-columns: 1fr; }
    .split-panel--reverse .split-image { order: initial; }
    .page-hero__image { max-width: 680px; }
    .card-grid, .card-grid--four, .media-grid, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-inner { grid-template-columns: 1.35fr repeat(2, 1fr); }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
    :root { --container: min(100% - 24px, 1200px); }
    .header-inner { width: min(100% - 24px, 1360px); }
    .brand-logo { width: 118px; }
    .main-btn { min-height: 40px; padding: 0 17px; }
    .carousel-shell { width: min(100% - 24px, 1360px); margin-top: 14px; }
    .carousel-slide img { height: clamp(190px, 57vw, 330px); }
    .carousel-arrow { width: 38px; height: 38px; font-size: 22px; }
    .page-hero { padding: 54px 0 64px; }
    .page-hero__content h1 { font-size: clamp(34px, 11vw, 48px); }
    .hero-facts { grid-template-columns: 1fr; }
    .section { padding: 58px 0; }
    .card-grid, .card-grid--four, .media-grid, .media-grid--two, .review-grid, .contact-grid { grid-template-columns: 1fr; }
    .media-card__image img { height: 205px; }
    .notice-panel { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 30px 20px; padding-top: 48px; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 420px) {
    .header-actions { gap: 7px; }
    .header-actions .main-btn { padding-inline: 14px; }
    .menu-toggle { width: 41px; height: 41px; }
    .drawer-nav { grid-template-columns: 1fr; }
    .intro-panel { padding: 24px; }
    .footer-inner { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}