:root {
    --page-bg: #EAF2FB;
    --content-bg: #FFFFFF;
    --soft-bg: #F4F8FF;
    --soft-bg-2: #EDF5FF;
    --soft-bg-3: #E1ECF8;
    --blue: #2FA8F7;
    --blue-light: #45C7FF;
    --blue-deep: #137CD8;
    --title: #137CD8;
    --text: #24364F;
    --muted: #5D718A;
    --border: rgba(47, 168, 247, 0.14);
    --footer: #102B46;
    --footer-text: #EAF6FF;
    --shadow: 0 18px 50px rgba(33, 92, 142, 0.11);
    --radius-lg: 30px;
    --radius-md: 22px;
    --radius-sm: 15px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
    margin: 0;
    color: var(--text);
    background: var(--page-bg);
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
}
body.drawer-open { overflow-y: hidden; }
a, button { touch-action: manipulation; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 20000; padding: 10px 16px; background: #fff; border-radius: 10px; }
.skip-link:focus { top: 12px; }

.desktop-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 7000;
    height: 76px;
    background: rgba(255,255,255,.93);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
}
.nav-shell { width: min(1180px, calc(100% - 40px)); height: 100%; margin: 0 auto; display: flex; align-items: center; gap: 28px; }
.brand-logo { width: 154px; flex: 0 0 auto; }
.brand-logo img { width: 100%; max-height: 48px; object-fit: contain; }
.core-nav { display: flex; align-items: center; justify-content: center; gap: 8px; flex: 1; min-width: 0; white-space: nowrap; }
.core-nav a { position: relative; padding: 10px 14px; border-radius: 12px; color: var(--muted); font-weight: 700; transition: .2s ease; }
.core-nav a:hover { color: var(--blue-deep); background: var(--soft-bg-2); }
.core-nav a.active { color: var(--blue-deep); }
.core-nav a.active::after { content: ""; position: absolute; left: 50%; bottom: 1px; width: 24px; height: 3px; border-radius: 999px; background: var(--blue); transform: translateX(-50%); }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; min-width: 92px; padding: 10px 22px; color: #fff; font-weight: 800; border: 0; border-radius: 999px; background: linear-gradient(135deg, #45C7FF 0%, #2FA8F7 48%, #137CD8 100%); box-shadow: 0 12px 26px rgba(19,124,216,0.18); transition: transform .2s ease, box-shadow .2s ease; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(19,124,216,.24); }
.nav-register-wrap { position: relative; z-index: 9050; flex: 0 0 auto; }

.channel-bar { position: fixed; left: 0; right: 0; top: 76px; z-index: 6500; background: rgba(244,248,255,.94); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); }
.channel-scroll { width: min(1220px, 100%); margin: 0 auto; display: flex; gap: 8px; overflow-x: auto; padding: 10px 20px; scrollbar-width: thin; overscroll-behavior-inline: contain; }
.channel-scroll a { flex: 0 0 auto; padding: 7px 12px; border-radius: 999px; color: var(--muted); background: rgba(255,255,255,.8); font-size: 14px; line-height: 1.4; }
.channel-scroll a:hover, .channel-scroll a.active { color: #fff; background: var(--blue); }

.mobile-header, .mobile-drawer, .drawer-mask, .mobile-bottom-nav { display: none; }
.site-main { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 154px 0 60px; }

.banner-wrap { padding: 8px 0 28px; }
.banner-slider { position: relative; z-index: 1; overflow: hidden; background: #fff; border: 1px solid var(--border); border-radius: 32px; box-shadow: var(--shadow); aspect-ratio: 16 / 5.7; min-height: 250px; }
.slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .45s ease; }
.slide.active { opacity: 1; visibility: visible; }
.slide img { width: 100%; height: 100%; object-fit: contain; background: var(--soft-bg-3); }
.slider-control { position: absolute; z-index: 3; top: 50%; width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.7); border-radius: 50%; color: var(--blue-deep); background: rgba(255,255,255,.9); box-shadow: 0 8px 20px rgba(27,69,108,.14); transform: translateY(-50%); }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; z-index: 3; left: 50%; bottom: 18px; display: flex; gap: 9px; transform: translateX(-50%); }
.slider-dot { width: 12px; height: 12px; min-width: 12px; min-height: 12px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: rgba(19,124,216,.35); box-shadow: 0 2px 8px rgba(19,124,216,.15); }
.slider-dot.active { background: var(--blue-deep); transform: scale(1.15); }

.page-hero { position: relative; overflow: hidden; margin-bottom: 28px; padding: clamp(32px, 6vw, 72px); background: linear-gradient(135deg, #fff 0%, #F4F8FF 55%, #E1ECF8 100%); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.page-hero::after { content: ""; position: absolute; right: -80px; top: -100px; width: 280px; height: 280px; border-radius: 50%; background: rgba(69,199,255,.13); }
.page-hero .eyebrow { display: inline-flex; padding: 7px 13px; border-radius: 999px; color: var(--blue-deep); background: #fff; font-size: 14px; font-weight: 800; border: 1px solid var(--border); }
.page-hero h1 { position: relative; z-index: 1; max-width: 780px; margin: 18px 0 14px; color: var(--title); font-size: clamp(32px, 5vw, 56px); line-height: 1.2; }
.page-hero p { position: relative; z-index: 1; max-width: 820px; margin: 0; color: var(--muted); font-size: clamp(16px, 2vw, 19px); }

.section { margin: 28px 0; padding: clamp(24px, 4vw, 42px); background: var(--content-bg); border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: 0 13px 34px rgba(33,92,142,.07); }
.section.soft { background: linear-gradient(135deg, #fff, var(--soft-bg)); }
.section-title { margin: 0 0 14px; color: var(--title); font-size: clamp(25px, 3vw, 36px); line-height: 1.3; }
.section-lead { max-width: 860px; margin: 0 0 24px; color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--blue-deep); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.media-split { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr); gap: clamp(24px, 5vw, 54px); align-items: center; }
.media-split.reverse .media-copy { order: 2; }
.media-split.reverse .media-visual { order: 1; }
.media-visual { overflow: hidden; min-height: 260px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md); background: var(--soft-bg-2); border: 1px solid var(--border); }
.media-visual img { width: 100%; max-height: 440px; object-fit: contain; }
.media-copy h2 { margin-top: 0; color: var(--title); font-size: clamp(26px, 3vw, 38px); line-height: 1.3; }
.media-copy p { color: var(--muted); }

.quick-grid, .card-grid, .info-board, .review-grid, .faq-grid { display: grid; gap: 18px; }
.quick-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.card-grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.card-grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.info-board { 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)); }
.quick-card, .info-card, .content-card, .review-card, .faq-card { position: relative; overflow: hidden; min-width: 0; padding: 22px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; }
.quick-card::before, .info-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: linear-gradient(var(--blue-light), var(--blue-deep)); }
.quick-card h3, .info-card h3, .content-card h3, .review-card h3, .faq-card h3 { margin: 0 0 10px; color: var(--title); font-size: 20px; line-height: 1.4; }
.quick-card p, .info-card p, .content-card p, .review-card p, .faq-card p { margin: 0 0 12px; color: var(--muted); }
.content-card img { width: 100%; aspect-ratio: 16/9; object-fit: contain; margin-bottom: 18px; border-radius: 14px; background: var(--soft-bg-2); }
.content-card ul, .feature-list { margin: 14px 0 0; padding: 0; list-style: none; }
.content-card li, .feature-list li { position: relative; margin: 8px 0; padding-left: 22px; color: var(--muted); }
.content-card li::before, .feature-list li::before { content: ""; position: absolute; left: 0; top: .68em; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); }

.notice-strip { margin: 28px 0; padding: 20px 24px; color: #0D4A79; background: linear-gradient(90deg, #DFF3FF, #EDF5FF); border: 1px solid rgba(47,168,247,.25); border-radius: 18px; }
.notice-strip p { margin: 0; }

.article { max-width: 900px; margin: 0 auto; }
.article h2 { margin: 34px 0 12px; color: var(--title); font-size: 28px; }
.article h3 { margin: 26px 0 10px; color: var(--blue-deep); font-size: 22px; }
.article p { margin: 0 0 16px; color: var(--muted); }
.article ul { padding-left: 22px; color: var(--muted); }
.article li { margin: 8px 0; }
.article .callout { margin: 24px 0; padding: 20px 22px; border-left: 4px solid var(--blue); background: var(--soft-bg); border-radius: 12px; }

.faq-list { display: grid; gap: 14px; }
details.faq-item { border: 1px solid var(--border); border-radius: 14px; background: #fff; }
details.faq-item summary { min-height: 52px; padding: 15px 18px; color: var(--title); font-weight: 800; cursor: pointer; list-style: none; }
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item p { margin: 0; padding: 0 18px 18px; color: var(--muted); }

.form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.field { display: grid; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { color: var(--title); font-weight: 800; }
.field input, .field textarea, .field select { width: 100%; min-height: 48px; padding: 12px 14px; color: var(--text); background: #fff; border: 1px solid var(--border); border-radius: 12px; outline: none; }
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(47,168,247,.1); }

.floating-service { position: fixed; z-index: 8000; right: max(18px, calc((100vw - 1320px)/2)); top: 50%; width: 118px; display: grid; gap: 8px; padding: 12px; border: 1px solid var(--border); border-radius: 18px; background: rgba(255,255,255,.95); box-shadow: var(--shadow); transform: translateY(-50%); backdrop-filter: blur(12px); }
.floating-service a:not(.main-btn), .floating-service button { min-height: 40px; display: flex; align-items: center; justify-content: center; border: 0; border-radius: 10px; color: var(--blue-deep); background: var(--soft-bg); font-weight: 700; }
.floating-service .main-btn { min-width: 0; padding-inline: 12px; }

.site-footer { color: var(--footer-text); background: var(--footer); }
.footer-grid { width: min(1180px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 1.8fr repeat(3,1fr); gap: 32px; padding: 48px 0 34px; }
.footer-brand img { width: 150px; max-height: 54px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 480px; color: rgba(234,246,255,.75); }
.site-footer h2 { margin: 0 0 14px; color: #fff; font-size: 18px; }
.site-footer a { display: block; margin: 9px 0; color: rgba(234,246,255,.78); }
.site-footer a:hover { color: #fff; }
.footer-note { border-top: 1px solid rgba(255,255,255,.1); padding: 22px 20px 30px; text-align: center; }
.footer-note p { max-width: 1020px; margin: 6px auto; color: rgba(234,246,255,.68); font-size: 14px; }

@media (max-width: 1320px) {
    .floating-service { display: none; }
}

@media (max-width: 980px) {
    .core-nav a { padding-inline: 9px; font-size: 14px; }
    .quick-grid, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .info-board { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .media-split { grid-template-columns: 1fr; }
    .media-split.reverse .media-copy, .media-split.reverse .media-visual { order: initial; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 760px) {
    .desktop-header, .channel-bar { display: none; }
    .mobile-header { position: fixed; inset: 0 0 auto 0; z-index: 9000; height: 64px; display: grid; grid-template-columns: 64px 1fr 92px; align-items: center; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--border); backdrop-filter: blur(14px); }
    .menu-button { width: 44px; height: 44px; margin-left: 10px; border: 0; border-radius: 12px; color: var(--blue-deep); background: var(--soft-bg); font-size: 23px; line-height: 1; }
    .mobile-logo { justify-self: center; width: 132px; }
    .mobile-logo img { width: 100%; max-height: 42px; object-fit: contain; }
    .mobile-register-wrap { position: relative; z-index: 9050; justify-self: end; margin-right: 10px; }
    .mobile-register-wrap .main-btn { min-width: 74px; min-height: 42px; padding: 8px 16px; }
    .drawer-mask { position: fixed; inset: 0; z-index: 9990; display: block; visibility: hidden; opacity: 0; pointer-events: none; background: rgba(9,28,48,.46); transition: opacity .25s ease, visibility .25s ease; }
    .drawer-mask.show { visibility: visible; opacity: 1; pointer-events: auto; }
    .mobile-drawer { position: fixed; inset: 0 auto 0 0; z-index: 10000; display: block; width: min(86vw, 350px); background: #fff; transform: translateX(-105%); transition: transform .28s ease; box-shadow: 20px 0 50px rgba(16,43,70,.22); overflow-y: auto; overscroll-behavior: contain; }
    .mobile-drawer.open { transform: translateX(0); }
    .drawer-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; padding: 16px; background: rgba(255,255,255,.98); border-bottom: 1px solid var(--border); }
    .drawer-logo { width: 142px; }
    .drawer-close { width: 44px; height: 44px; border: 0; border-radius: 50%; color: var(--blue-deep); background: var(--soft-bg); font-size: 30px; line-height: 1; }
    .drawer-nav { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; padding: 16px 16px 40px; }
    .drawer-nav a { min-height: 44px; display: flex; align-items: center; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; color: var(--muted); background: var(--soft-bg); font-weight: 700; }
    .drawer-nav a.active { color: #fff; background: var(--blue); }
    .site-main { width: min(100% - 24px, 720px); padding: 82px 0 92px; }
    .banner-slider { aspect-ratio: 16 / 7.5; min-height: 170px; border-radius: 22px; }
    .slider-control { width: 44px; height: 44px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .slider-dots { bottom: 12px; }
    .page-hero { border-radius: 22px; padding: 28px 22px; }
    .section { padding: 24px 18px; border-radius: 20px; }
    .quick-grid, .card-grid.two, .card-grid.three, .review-grid, .faq-grid, .info-board, .form-grid { grid-template-columns: 1fr; }
    .field.full { grid-column: auto; }
    .media-visual { min-height: 210px; }
    .footer-grid { width: min(100% - 28px, 720px); grid-template-columns: 1fr 1fr; gap: 24px; padding-bottom: 90px; }
    .footer-brand { grid-column: 1 / -1; }
    .mobile-bottom-nav { position: fixed; inset: auto 0 0 0; z-index: 8500; display: grid; grid-template-columns: repeat(4,1fr); height: calc(66px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: rgba(255,255,255,.97); border-top: 1px solid var(--border); box-shadow: 0 -8px 30px rgba(16,43,70,.1); backdrop-filter: blur(14px); }
    .mobile-bottom-nav a { min-width: 0; min-height: 58px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: var(--muted); font-size: 12px; font-weight: 700; }
    .mobile-bottom-nav a span { color: var(--blue); font-size: 20px; line-height: 1; }
    .mobile-bottom-nav a.active { color: var(--blue-deep); background: var(--soft-bg); }
}

@media (max-width: 420px) {
    .mobile-header { grid-template-columns: 58px 1fr 82px; }
    .mobile-logo { width: 118px; }
    .mobile-register-wrap .main-btn { min-width: 68px; padding-inline: 12px; }
    .drawer-nav { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
    .page-hero h1 { font-size: 31px; }
}