* { box-sizing: border-box; }
:root {
    --bg: #EAF2FB;
    --surface: #FFFFFF;
    --surface-soft: #F4F8FF;
    --surface-blue: #EDF5FF;
    --surface-deep: #E1ECF8;
    --blue: #2FA8F7;
    --blue-bright: #45C7FF;
    --blue-deep: #137CD8;
    --title: #137CD8;
    --text: #24364F;
    --muted: #5D718A;
    --border: rgba(47,168,247,0.14);
    --footer: #102B46;
    --footer-text: #EAF6FF;
    --shadow: 0 20px 55px rgba(43, 92, 138, 0.12);
    --radius-xl: 32px;
    --radius-lg: 24px;
    --radius-md: 18px;
}
html { scroll-behavior: smooth; overflow-x: hidden; }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.75; }
body.menu-open { overflow-y: hidden; overflow-x: hidden; }
a, button { touch-action: manipulation; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
.section-wrap { width: min(1180px, calc(100% - 40px)); margin-left: auto; margin-right: auto; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 9000; }
.desktop-header { height: 78px; background: rgba(255,255,255,.92); border-bottom: 1px solid var(--border); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
.header-inner { width: min(1180px, calc(100% - 40px)); height: 100%; margin: 0 auto; display: flex; align-items: center; gap: 30px; }
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; min-height: 44px; }
.brand-logo img { width: 150px; max-height: 48px; object-fit: contain; }
.core-nav { flex: 1; display: flex; justify-content: center; align-items: stretch; gap: 8px; white-space: nowrap; }
.nav-link { position: relative; display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 15px; border-radius: 999px; color: var(--muted); font-weight: 600; transition: .2s ease; }
.nav-link:hover { color: var(--blue-deep); background: var(--surface-blue); }
.core-nav .nav-link.is-active { color: var(--blue-deep); background: transparent; }
.core-nav .nav-link.is-active::after { content: ""; position: absolute; left: 28%; right: 28%; bottom: 2px; height: 3px; border-radius: 3px; background: var(--blue); }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-width: 92px; min-height: 44px; padding: 10px 22px; color: #fff; font-weight: 700; 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,.25); }
.header-register { position: relative; z-index: 9200; flex: 0 0 auto; }
.channel-bar { height: 58px; display: flex; align-items: center; background: rgba(244,248,255,.94); border-bottom: 1px solid var(--border); backdrop-filter: blur(16px); }
.channel-scroll { width: min(1180px, calc(100% - 40px)); margin: 0 auto; display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.channel-scroll::-webkit-scrollbar { display: none; }
.channel-link { min-height: 36px; padding: 7px 13px; font-size: 14px; flex: 0 0 auto; background: rgba(255,255,255,.72); }
.channel-link.is-active { color: #fff; background: var(--blue); }
.mobile-header { display: none; }
.mobile-drawer { position: fixed; z-index: 10000; inset: 0 auto 0 0; width: min(86vw, 340px); padding: 18px; background: #fff; box-shadow: 18px 0 50px rgba(15,48,80,.24); transform: translateX(-105%); visibility: hidden; transition: transform .25s ease, visibility .25s ease; overflow-y: auto; }
.mobile-drawer.is-open { transform: translateX(0); visibility: visible; }
.drawer-mask { position: fixed; z-index: 9990; inset: 0; background: rgba(16,43,70,.42); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.drawer-mask.is-open { opacity: 1; visibility: visible; pointer-events: auto; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 150px; max-height: 50px; object-fit: contain; }
.drawer-close { width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--surface-blue); color: var(--blue-deep); font-size: 28px; cursor: pointer; }
.drawer-nav { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 9px; padding-top: 16px; }
.drawer-nav .nav-link { justify-content: flex-start; min-height: 46px; padding: 9px 12px; background: var(--surface-soft); }
.drawer-nav .nav-link.is-active { color: #fff; background: linear-gradient(135deg, var(--blue-bright), var(--blue-deep)); }
.site-main { padding-top: 136px; }
.floating-service { position: fixed; z-index: 8000; right: 18px; top: 50%; transform: translateY(-50%); width: 122px; padding: 12px; border: 1px solid var(--border); border-radius: 22px; background: rgba(255,255,255,.95); box-shadow: var(--shadow); display: grid; gap: 6px; }
.floating-service > a:not(.main-btn), .floating-service button { min-height: 40px; display: flex; align-items: center; justify-content: center; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--blue-deep); cursor: pointer; }
.floating-service .main-btn { min-width: 0; width: 100%; }
.banner-area { padding: 30px 0 18px; }
.banner-slider { position: relative; z-index: 1; overflow: hidden; border: 10px solid rgba(255,255,255,.7); border-radius: 34px; background: #fff; box-shadow: var(--shadow); }
.banner-slides { position: relative; aspect-ratio: 16 / 5.8; min-height: 240px; }
.banner-slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .45s ease, visibility .45s ease; }
.banner-slide.is-active { opacity: 1; visibility: visible; }
.banner-slide img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.slider-arrow { position: absolute; z-index: 3; top: 50%; transform: translateY(-50%); width: 46px; height: 46px; border: 1px solid rgba(47,168,247,.25); border-radius: 50%; background: rgba(255,255,255,.92); color: var(--blue-deep); font-size: 26px; cursor: pointer; box-shadow: 0 10px 30px rgba(16,43,70,.14); }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; z-index: 3; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; gap: 9px; }
.slider-dot { width: 11px; height: 11px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.75); box-shadow: 0 0 0 1px rgba(19,124,216,.25); cursor: pointer; }
.slider-dot.is-active { width: 28px; border-radius: 999px; background: var(--blue); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
.eyebrow::before { content: ""; width: 24px; height: 3px; border-radius: 3px; background: linear-gradient(90deg, var(--blue-bright), var(--blue-deep)); }
h1, h2, h3 { margin-top: 0; color: var(--title); line-height: 1.3; }
h1 { margin-bottom: 20px; font-size: clamp(36px, 5vw, 64px); letter-spacing: -.04em; }
h2 { margin-bottom: 16px; font-size: clamp(28px, 3vw, 42px); letter-spacing: -.02em; }
h3 { margin-bottom: 10px; font-size: 21px; }
p { margin-top: 0; }
.page-hero { margin-top: 32px; padding: 46px; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 46px; border: 1px solid var(--border); border-radius: var(--radius-xl); background: linear-gradient(135deg, rgba(255,255,255,.96), rgba(237,245,255,.96)); box-shadow: var(--shadow); }
.page-hero__content > p { max-width: 670px; margin-bottom: 24px; color: var(--muted); font-size: 18px; }
.page-hero__media { min-height: 310px; display: flex; align-items: center; justify-content: center; padding: 18px; border-radius: 26px; background: #fff; }
.page-hero__media img { width: 100%; max-height: 390px; object-fit: contain; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; }
.text-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--blue-deep); font-weight: 700; }
.text-link::after { content: "→"; margin-left: 8px; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.content-section { padding: 72px 0 0; }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading p { color: var(--muted); }
.prose-card { padding: 34px 38px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: 0 16px 45px rgba(43,92,138,.08); }
.prose-card p:last-child { margin-bottom: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.feature-card { position: relative; min-height: 230px; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: rgba(255,255,255,.94); box-shadow: 0 14px 36px rgba(43,92,138,.07); transition: transform .2s ease, box-shadow .2s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 22px 48px rgba(43,92,138,.13); }
.feature-mark { display: block; width: 44px; height: 10px; margin-bottom: 22px; border-radius: 999px; background: linear-gradient(90deg, var(--blue-bright), var(--blue-deep)); }
.feature-card p { color: var(--muted); }
.split-section { margin-top: 72px; padding: 34px; display: grid; grid-template-columns: .92fr 1.08fr; gap: 42px; align-items: center; border: 1px solid var(--border); border-radius: var(--radius-xl); background: rgba(255,255,255,.95); box-shadow: var(--shadow); }
.split-section--reverse .split-section__media { order: 2; }
.split-section--reverse .split-section__content { order: 1; }
.split-section__media { min-height: 320px; display: flex; align-items: center; justify-content: center; padding: 18px; border-radius: 24px; background: var(--surface-soft); }
.split-section__media img { width: 100%; max-height: 390px; object-fit: contain; }
.split-section__content > p { color: var(--muted); font-size: 17px; }
.check-list { margin: 20px 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue); font-weight: 900; }
.quick-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.quick-card { padding: 24px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.quick-card p { min-height: 58px; color: var(--muted); }
.info-strip { margin-top: 60px; padding: 26px 30px; border-radius: 22px; background: linear-gradient(135deg, #DFF3FF, #F8FBFF); border: 1px solid var(--border); color: var(--text); }
.board-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.board-card { padding: 24px; border-radius: 22px; background: #fff; border: 1px solid var(--border); }
.board-card p { color: var(--muted); margin-bottom: 0; }
.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.dual-card { padding: 30px; border: 1px solid var(--border); border-radius: 26px; background: #fff; }
.dual-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: contain; border-radius: 18px; background: var(--surface-soft); margin-bottom: 22px; }
.triple-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.category-card { padding: 24px; border: 1px solid var(--border); border-radius: 24px; background: #fff; }
.category-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; border-radius: 16px; background: var(--surface-soft); margin-bottom: 20px; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.review-card { padding: 26px; border-radius: 22px; background: #fff; border: 1px solid var(--border); }
.review-card::before { content: "“"; display: block; height: 34px; color: var(--blue); font-size: 44px; line-height: 1; }
.review-card p { color: var(--muted); }
.review-card strong { color: var(--blue-deep); }
.faq-list { display: grid; gap: 14px; }
.faq-item { overflow: hidden; border: 1px solid var(--border); border-radius: 18px; background: #fff; }
.faq-item summary { min-height: 56px; padding: 16px 20px; color: var(--title); font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--blue); font-size: 24px; }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 20px 18px; color: var(--muted); }
.notice-box { margin-top: 72px; padding: 30px; border-radius: 24px; background: #102B46; color: #EAF6FF; }
.notice-box h2 { color: #fff; }
.notice-box p:last-child { margin-bottom: 0; }
.site-footer { margin-top: 84px; padding: 58px 0 20px; background: var(--footer); color: var(--footer-text); }
.footer-inner { display: grid; grid-template-columns: 1.15fr 1.85fr; gap: 70px; }
.footer-brand img { width: 170px; max-height: 58px; object-fit: contain; margin-bottom: 22px; filter: brightness(0) invert(1); }
.footer-brand p { color: rgba(234,246,255,.75); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 26px; }
.footer-links h3 { color: #fff; font-size: 17px; }
.footer-links a { display: block; min-height: 38px; color: rgba(234,246,255,.75); }
.footer-links a:hover { color: #fff; }
.footer-note { margin-top: 38px; padding-top: 22px; border-top: 1px solid rgba(234,246,255,.12); color: rgba(234,246,255,.66); font-size: 14px; }
.footer-note { display: flex; justify-content: space-between; gap: 24px; }
.footer-note p:first-child { max-width: 850px; }
.mobile-bottom-nav { display: none; }

@media (max-width: 1280px) {
    .floating-service { display: none; }
}
@media (max-width: 980px) {
    .core-nav { gap: 2px; }
    .nav-link { padding-left: 10px; padding-right: 10px; }
    .page-hero { grid-template-columns: 1fr; }
    .page-hero__media { min-height: 260px; }
    .feature-grid, .quick-grid, .triple-grid, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .board-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .split-section { grid-template-columns: 1fr; }
    .split-section--reverse .split-section__media, .split-section--reverse .split-section__content { order: initial; }
    .footer-inner { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 760px) {
    .desktop-header, .channel-bar { display: none; }
    .mobile-header { height: 72px; padding: 0 14px; display: grid; grid-template-columns: 54px 1fr auto; align-items: center; gap: 12px; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--border); backdrop-filter: blur(18px); }
    .menu-button { width: 46px; height: 46px; border: 0; border-radius: 14px; background: var(--surface-blue); display: grid; place-content: center; gap: 5px; cursor: pointer; }
    .menu-button span { display: block; width: 22px; height: 2px; background: var(--blue-deep); border-radius: 2px; }
    .mobile-logo { justify-self: center; min-height: 44px; display: flex; align-items: center; }
    .mobile-logo img { width: 128px; max-height: 43px; object-fit: contain; }
    .mobile-register { position: relative; z-index: 9300; min-width: 74px; padding: 8px 15px; }
    .site-main { padding-top: 72px; }
    .section-wrap { width: min(100% - 24px, 1180px); }
    .banner-area { padding-top: 18px; }
    .banner-slider { border-width: 6px; border-radius: 24px; }
    .banner-slides { aspect-ratio: 16 / 8.6; min-height: 190px; }
    .slider-arrow { width: 44px; height: 44px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .page-hero { margin-top: 18px; padding: 28px 22px; gap: 24px; border-radius: 24px; }
    .page-hero__content > p { font-size: 16px; }
    .page-hero__media { min-height: 210px; padding: 10px; }
    .content-section { padding-top: 54px; }
    .prose-card { padding: 24px 20px; }
    .feature-grid, .quick-grid, .board-grid, .dual-grid, .triple-grid, .review-grid { grid-template-columns: 1fr; }
    .quick-card p { min-height: auto; }
    .split-section { margin-top: 54px; padding: 22px; gap: 24px; border-radius: 24px; }
    .split-section__media { min-height: 220px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .footer-note { display: block; padding-bottom: 72px; }
    .mobile-bottom-nav { position: fixed; z-index: 8500; inset: auto 0 0; min-height: 62px; padding: 8px max(10px, env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left)); display: grid; grid-template-columns: repeat(4, 1fr); background: rgba(255,255,255,.97); border-top: 1px solid var(--border); box-shadow: 0 -12px 30px rgba(16,43,70,.1); }
    .mobile-bottom-nav a { min-height: 44px; display: flex; align-items: center; justify-content: center; color: var(--blue-deep); font-weight: 700; }
    .site-footer { padding-bottom: 0; }
}
@media (max-width: 430px) {
    .mobile-logo img { width: 112px; }
    .mobile-register { min-width: 68px; }
    .drawer-nav { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr; }
    .banner-slides { min-height: 170px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}