* { box-sizing: border-box; }
:root {
    --red: #C90000;
    --red-dark: #A80000;
    --red-soft: rgba(201, 0, 0, .08);
    --text: #1F2329;
    --muted: #5D6673;
    --soft: #8A93A0;
    --line: rgba(201, 0, 0, .12);
    --light: #F6F7F9;
    --section: #F1F3F6;
    --shadow: 0 12px 30px rgba(18, 28, 45, .08);
}
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: #FFFFFF;
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.72;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }
.site-width { width: min(1420px, calc(100% - 40px)); margin-inline: auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(201, 0, 0, .08);
}
.header-inner {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.logo { flex: 0 0 auto; }
.logo img { max-height: 52px; width: auto; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 18px; white-space: nowrap; flex-wrap: nowrap; min-width: 0; }
.nav-core a { position: relative; padding: 10px 4px; color: var(--text); font-weight: 700; }
.nav-core a:hover, .nav-core a.active { color: var(--red); }
.nav-core a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -10px; height: 3px; border-radius: 999px; background: var(--red); }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 25px;
    border-radius: 999px;
    background: linear-gradient(180deg, #F12B2B 0%, #C90000 55%, #A80000 100%);
    color: #FFFFFF;
    font-weight: 800;
    box-shadow: 0 8px 20px rgba(201, 0, 0, .2);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 12px 24px rgba(201, 0, 0, .26); }
.header-register { flex: 0 0 auto; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 9px; border: 0; border-radius: 12px; background: var(--red-soft); }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--red); border-radius: 999px; }
.page-shell { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 30px; align-items: start; padding-top: 24px; }
.side-category { position: sticky; top: 98px; max-height: calc(100vh - 118px); overflow: auto; padding: 16px; background: #FFFFFF; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.side-title { padding: 4px 10px 12px; color: var(--red); font-weight: 900; }
.side-category nav { display: grid; gap: 4px; }
.side-category a { padding: 8px 10px; border-radius: 12px; color: var(--text); font-size: 14px; }
.side-category a:hover, .side-category a.active { color: var(--red); background: var(--red-soft); font-weight: 700; }
.main-content { min-width: 0; padding-bottom: 30px; }
.banner-slider { position: relative; min-height: 260px; max-height: 360px; margin: 0 auto 34px; overflow: hidden; border-radius: 22px; background: #F7F8FA; box-shadow: var(--shadow); }
.banner-slides { position: relative; width: 100%; height: clamp(260px, 28vw, 360px); }
.banner-slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .55s ease; }
.banner-slide.active { opacity: 1; pointer-events: auto; }
.banner-slide img { width: 100%; height: 100%; object-fit: contain; background: #F7F8FA; }
.banner-caption, .banner-text, .slide-title, .slide-desc, .slide-content, .slide-card, .banner-card { display: none !important; }
.slider-arrow { position: absolute; top: 50%; z-index: 3; width: 44px; height: 44px; border: 0; border-radius: 50%; transform: translateY(-50%); background: rgba(17, 21, 28, .68); color: #fff; font-size: 24px; cursor: pointer; }
.slider-arrow:hover { background: var(--red); }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; left: 50%; bottom: 15px; z-index: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.slider-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(255, 255, 255, .7); box-shadow: 0 0 0 1px rgba(0,0,0,.18); cursor: pointer; }
.slider-dot.active { width: 25px; border-radius: 999px; background: var(--red); }
.hero-panel, .content-section, .notice-panel, .faq-panel, .review-panel { margin-bottom: 28px; }
.hero-panel { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, .8fr); gap: 26px; align-items: center; padding: clamp(28px, 4vw, 56px); border-radius: 24px; background: linear-gradient(135deg, #fff 0%, #fff 56%, #F7F8FA 100%); border: 1px solid var(--line); box-shadow: var(--shadow); }
.hero-panel h1 { margin: 0 0 14px; color: var(--red); font-size: clamp(30px, 4vw, 52px); line-height: 1.2; }
.hero-panel p { margin: 0 0 22px; color: var(--muted); }
.hero-panel img { width: 100%; max-height: 280px; object-fit: contain; border-radius: 18px; background: #F7F8FA; }
.kicker { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--red); font-size: 13px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.kicker::before { content: ""; width: 24px; height: 3px; border-radius: 999px; background: var(--red); }
.section-head { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 18px; }
.section-head h2, h1, h2, h3, .section-title { color: var(--red); }
.section-head h2 { margin: 0; font-size: clamp(24px, 3vw, 34px); line-height: 1.25; }
.section-head p { max-width: 680px; margin: 0; color: var(--muted); }
.content-section { padding: clamp(24px, 3vw, 38px); border-radius: 22px; background: #FFFFFF; border: 1px solid var(--line); box-shadow: var(--shadow); }
.alt-section { background: var(--light); border-color: transparent; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card, .zone-card, .info-card, .review-card { background: #FFFFFF; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 18px; overflow: hidden; }
.card-body { padding: 20px; }
.card h3, .zone-card h3, .info-card h3, .review-card h3 { margin: 0 0 8px; color: var(--red); font-size: 19px; }
.card p, .zone-card p, .info-card p, .review-card p { margin: 0; color: var(--muted); }
.card-link { display: inline-flex; margin-top: 14px; color: var(--red); font-weight: 800; }
.card-link::after { content: "→"; margin-left: 6px; transition: transform .2s ease; }
.card-link:hover::after { transform: translateX(3px); }
.product-card img { width: 100%; height: 170px; object-fit: contain; background: #F7F8FA; }
.zone-card img, .info-card img, .content-img { width: 100%; max-height: 230px; object-fit: contain; background: #F7F8FA; }
.split-content { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(280px, .95fr); gap: 24px; align-items: center; }
.split-content.reverse { grid-template-columns: minmax(280px, .95fr) minmax(0, 1.05fr); }
.split-content.reverse .split-image { order: -1; }
.split-image img { width: 100%; max-height: 300px; object-fit: contain; border-radius: 18px; background: #F7F8FA; }
.prose p { margin: 0 0 14px; color: var(--muted); }
.prose p:last-child { margin-bottom: 0; }
.summary-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; overflow: hidden; margin-bottom: 28px; border-radius: 20px; background: rgba(255,255,255,.2); box-shadow: var(--shadow); }
.summary-item { padding: 24px; background: linear-gradient(145deg, #E71919, #A80000); color: #FFFFFF; }
.summary-item strong { display: block; margin-bottom: 8px; font-size: 19px; }
.summary-item p { margin: 0; color: rgba(255,255,255,.86); font-size: 14px; }
.channel-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; }
.channel-item { padding: 18px; border-radius: 16px; background: #FFFFFF; border: 1px solid var(--line); }
.channel-item h3 { margin: 0 0 6px; font-size: 17px; }
.channel-item p { min-height: 50px; margin: 0; color: var(--muted); font-size: 14px; }
.channel-item a { display: inline-flex; margin-top: 10px; color: var(--red); font-weight: 800; }
.bullet-list { display: grid; gap: 12px; margin: 18px 0 0; padding: 0; list-style: none; }
.bullet-list li { position: relative; padding: 14px 16px 14px 42px; border-radius: 14px; background: var(--light); color: var(--muted); }
.bullet-list li::before { content: "✓"; position: absolute; left: 16px; top: 13px; color: var(--red); font-weight: 900; }
.review-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.review-card { padding: 20px; }
.review-card .review-name { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; color: var(--text); font-weight: 800; }
.review-card .review-name::before { content: ""; width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(145deg, #F12B2B, #A80000); box-shadow: inset 0 0 0 8px rgba(255,255,255,.82); }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 19px 20px; border-radius: 16px; background: #FFFFFF; border: 1px solid var(--line); }
.faq-item h3 { margin: 0 0 8px; color: var(--text); font-size: 17px; }
.faq-item p { margin: 0; color: var(--muted); }
.notice-panel { padding: 24px; border-left: 5px solid var(--red); border-radius: 0 18px 18px 0; background: #FFF5F5; }
.notice-panel h2 { margin: 0 0 8px; font-size: 22px; }
.notice-panel p { margin: 0; color: var(--muted); }
.cta-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 30px; margin-bottom: 28px; border-radius: 20px; background: #11151C; color: #E7ECF3; }
.cta-panel h2 { margin: 0 0 4px; color: #FFFFFF; }
.cta-panel p { margin: 0; color: #B8C0CC; }
.site-footer { margin-top: 35px; padding: 46px 0 20px; background: #11151C; color: #E7ECF3; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 34px; }
.footer-brand img { max-height: 52px; width: auto; margin-bottom: 18px; }
.footer-grid h2 { margin: 0 0 14px; color: #FFFFFF; font-size: 17px; }
.footer-grid p { margin: 0; color: #AEB7C4; }
.footer-grid a { display: block; margin: 8px 0; color: #D7DEE8; }
.footer-grid a:hover { color: #FFFFFF; }
.footer-bottom { margin-top: 34px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.1); color: #8E98A7; font-size: 14px; }
.mobile-drawer { position: fixed; inset: 0 auto 0 0; z-index: 1200; width: min(84vw, 320px); padding: 18px; background: #FFFFFF; transform: translateX(-102%); transition: transform .28s ease; overflow-y: auto; box-shadow: 20px 0 40px rgba(0,0,0,.16); }
.mobile-drawer.open { transform: translateX(0); }
.drawer-mask { position: fixed; inset: 0; z-index: 1190; background: rgba(17,21,28,.52); opacity: 0; transition: opacity .25s ease; }
.drawer-mask.show { opacity: 1; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
.drawer-logo img { max-height: 46px; width: auto; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--red-soft); color: var(--red); font-size: 26px; }
.drawer-links { display: grid; gap: 4px; padding: 15px 0; }
.drawer-links a { padding: 11px 12px; border-radius: 12px; }
.drawer-links a.active, .drawer-links a:hover { color: var(--red); background: var(--red-soft); font-weight: 800; }
.drawer-open { overflow: hidden; }
.mobile-bottom-nav { display: none; }
.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.contact-box { padding: 20px; border-radius: 18px; background: var(--light); }
.contact-box h3 { margin: 0 0 8px; }
.contact-box p { margin: 0; color: var(--muted); }
@media (max-width: 1180px) {
    .site-width { width: min(100% - 28px, 1120px); }
    .page-shell { grid-template-columns: 190px minmax(0,1fr); gap: 22px; }
    .card-grid.four { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .summary-strip { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 960px) {
    .nav-core { display: none; }
    .menu-toggle { display: block; flex: 0 0 auto; }
    .header-inner { gap: 12px; }
    .logo { margin: 0 auto; }
    .header-register { padding: 0 18px; }
    .page-shell { display: block; padding-top: 16px; }
    .side-category { display: none; }
    .hero-panel, .split-content, .split-content.reverse { grid-template-columns: 1fr; }
    .split-content.reverse .split-image { order: 0; }
    .card-grid, .channel-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .banner-slides { height: clamp(210px, 39vw, 310px); }
    .banner-slider { min-height: 210px; }
}
@media (max-width: 640px) {
    body { padding-bottom: 72px; }
    .site-width { width: min(100% - 20px, 620px); }
    .site-header { position: sticky; }
    .header-inner { min-height: 64px; }
    .logo img { max-height: 42px; max-width: 130px; }
    .main-btn { min-height: 40px; padding: 0 18px; }
    .banner-slider { min-height: 150px; margin-bottom: 20px; border-radius: 16px; }
    .banner-slides { height: clamp(150px, 49vw, 210px); }
    .slider-arrow { width: 36px; height: 36px; font-size: 20px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .slider-dots { bottom: 10px; }
    .hero-panel, .content-section { padding: 22px 18px; border-radius: 18px; }
    .hero-panel h1 { font-size: 32px; }
    .card-grid, .card-grid.two, .card-grid.four, .channel-grid, .review-grid, .summary-strip, .contact-grid { grid-template-columns: 1fr; }
    .summary-strip { gap: 0; }
    .summary-item { padding: 20px; }
    .section-head { display: block; }
    .section-head p { margin-top: 8px; }
    .product-card img { height: 150px; }
    .zone-card img, .info-card img, .content-img { max-height: 190px; }
    .cta-panel { display: block; padding: 24px 20px; }
    .cta-panel .main-btn { margin-top: 16px; }
    .footer-grid { grid-template-columns: 1fr; }
    .mobile-bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 1100; display: grid; grid-template-columns: repeat(4, 1fr); padding: 7px 8px calc(7px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: rgba(255,255,255,.97); backdrop-filter: blur(10px); box-shadow: 0 -8px 24px rgba(18,28,45,.08); }
    .mobile-bottom-nav a { display: grid; justify-items: center; gap: 2px; color: var(--muted); font-size: 12px; font-weight: 700; }
    .mobile-bottom-nav span { display: grid; place-items: center; width: 28px; height: 24px; color: var(--red); font-size: 18px; }
    .mobile-bottom-nav a.active { color: var(--red); }
}