* { box-sizing: border-box; }
:root {
    --red: #C90000;
    --red-dark: #A80000;
    --text: #1F2329;
    --muted: #5D6673;
    --soft: #8A93A0;
    --line: rgba(201,0,0,0.12);
    --bg-soft: #F6F7F9;
    --bg-section: #F1F3F6;
    --shadow: 0 12px 30px rgba(18,28,45,0.08);
}
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: #FFFFFF;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button { font: inherit; }
.container { width: min(1240px, calc(100% - 36px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(201,0,0,0.08);
}
.header-inner {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.logo { flex: 0 0 auto; display: flex; align-items: center; }
.logo img { max-height: 52px; width: auto; display: block; }
.nav-core { display: flex; align-items: center; gap: 18px; white-space: nowrap; flex-wrap: nowrap; }
.nav-core a { color: var(--text); padding: 10px 4px; position: relative; 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: 42px;
    padding: 0 24px;
    background: linear-gradient(180deg, #F12B2B 0%, #C90000 55%, #A80000 100%);
    color: #FFFFFF;
    border-radius: 999px;
    font-weight: 800;
    box-shadow: 0 8px 20px rgba(201,0,0,0.18);
}
.header-register { flex: 0 0 auto; }
.menu-toggle { display: none; border: 0; background: transparent; width: 42px; height: 42px; padding: 8px; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; background: var(--text); margin: 6px 0; border-radius: 2px; }
.site-shell { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 28px; align-items: start; }
.side-category {
    position: sticky;
    top: 96px;
    margin: 24px 0 42px;
    max-height: calc(100vh - 118px);
    overflow: auto;
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 14px;
}
.side-title { padding: 8px 10px 12px; color: var(--red); font-weight: 900; }
.side-category nav { display: grid; gap: 4px; }
.side-category a { color: var(--text); border-radius: 12px; padding: 9px 10px; font-size: 14px; }
.side-category a:hover, .side-category a.active { color: var(--red); background: rgba(201,0,0,0.08); font-weight: 800; }
.site-main { min-width: 0; padding-bottom: 52px; }
.banner-slider {
    margin: 24px auto 34px;
    border-radius: 22px;
    background: #F7F8FA;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
    min-height: 260px;
    max-height: 360px;
}
.slides { height: 100%; min-height: inherit; }
.slide { display: none; height: 100%; min-height: inherit; }
.slide.active { display: block; }
.banner-slider img { width: 100%; height: 100%; min-height: inherit; max-height: 360px; object-fit: contain; background: #F7F8FA; display: block; }
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 50%;
    background: rgba(17,21,28,0.64);
    color: #fff;
    font-size: 28px;
    cursor: pointer;
}
.slider-arrow.prev { left: 16px; }
.slider-arrow.next { right: 16px; }
.slider-dots { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 8px; }
.slider-dot { width: 9px; height: 9px; border: 0; border-radius: 50%; background: rgba(255,255,255,0.65); padding: 0; cursor: pointer; }
.slider-dot.active { width: 24px; border-radius: 999px; background: #fff; }
.banner-caption, .banner-text, .slide-title, .slide-desc, .slide-content, .slide-card, .banner-card { display: none !important; }
.page-hero { margin: 24px 0 28px; padding: 34px; background: linear-gradient(135deg, #FFFFFF 0%, #F7F8FA 100%); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.page-hero .eyebrow { color: var(--red); font-weight: 900; letter-spacing: .08em; }
h1, h2, h3, .section-title { color: var(--red); line-height: 1.35; }
h1 { margin: 8px 0 12px; font-size: clamp(30px, 4vw, 48px); }
h2 { font-size: clamp(24px, 3vw, 34px); margin: 0 0 14px; }
h3 { font-size: 20px; margin: 0 0 10px; }
p { margin: 0 0 14px; }
.lead { color: var(--muted); font-size: 17px; max-width: 860px; }
.section { margin: 34px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.section-head p { max-width: 720px; color: var(--muted); margin: 0; }
.card, .zone-card, .info-card, .review-card, .faq-item, .notice-box {
    background: #FFFFFF;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: 18px;
}
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.card, .info-card, .review-card { padding: 22px; }
.zone-card { overflow: hidden; }
.zone-card .content { padding: 20px; }
.zone-card img, .info-card img, .content-img { max-width: 100%; height: auto; max-height: 230px; object-fit: contain; background: #F7F8FA; display: block; margin: 0 auto; }
.product-card { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.product-card img { width: 100%; height: 170px; object-fit: contain; background: #F7F8FA; display: block; }
.product-card .content { padding: 18px; }
.text-link { color: var(--red); font-weight: 800; }
.summary-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; background: var(--red); border-radius: 20px; padding: 16px; color: #fff; box-shadow: 0 12px 30px rgba(201,0,0,0.2); }
.summary-item { padding: 14px; border-right: 1px solid rgba(255,255,255,.24); }
.summary-item:last-child { border-right: 0; }
.summary-item strong { display: block; margin-bottom: 6px; font-size: 18px; }
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: center; }
.split.reverse { grid-template-columns: .9fr 1.1fr; }
.split.reverse .split-media { order: 2; }
.split-media { background: var(--bg-soft); border-radius: 18px; overflow: hidden; border: 1px solid rgba(31,35,41,.06); }
.split-media img { width: 100%; height: 260px; object-fit: contain; display: block; }
.check-list { margin: 16px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 24px; color: var(--muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--red); font-weight: 900; }
.badge { display: inline-flex; padding: 5px 10px; background: rgba(201,0,0,.08); color: var(--red); border-radius: 999px; font-weight: 800; font-size: 13px; margin-bottom: 10px; }
.notice-box { padding: 22px; background: #FFF8F8; }
.notice-box strong { color: var(--red); }
.reviews { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.review-card p { color: var(--muted); }
.review-card .name { color: var(--text); font-weight: 900; margin-top: 12px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item h3 { color: var(--text); font-size: 18px; }
.faq-item p { color: var(--muted); margin: 8px 0 0; }
.site-footer { background: #11151C; color: #E7ECF3; margin-top: 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .8fr 1fr; gap: 30px; padding: 44px 0 34px; }
.footer-brand img { max-height: 48px; width: auto; margin-bottom: 16px; }
.site-footer h2 { color: #FFFFFF; font-size: 18px; }
.site-footer a { display: block; color: #E7ECF3; margin: 7px 0; }
.site-footer p { color: #B8C0CC; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); text-align: center; padding: 18px; color: #AAB3C0; }
.mobile-drawer { position: fixed; z-index: 1200; left: 0; top: 0; bottom: 0; width: min(84vw, 320px); background: #fff; transform: translateX(-105%); transition: transform .22s ease; box-shadow: 18px 0 40px rgba(17,21,28,.18); overflow: auto; }
.mobile-drawer.open { transform: translateX(0); }
.drawer-overlay { position: fixed; z-index: 1150; inset: 0; background: rgba(17,21,28,.52); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.show { opacity: 1; }
.drawer-head { position: sticky; top: 0; display: flex; align-items: center; justify-content: space-between; background: #fff; padding: 14px; border-bottom: 1px solid var(--line); }
.drawer-logo img { max-height: 44px; width: auto; display: block; }
.drawer-close { border: 0; background: #F3F4F6; width: 38px; height: 38px; border-radius: 50%; font-size: 28px; cursor: pointer; }
.drawer-nav { padding: 12px; display: grid; gap: 5px; }
.drawer-nav a { padding: 11px 12px; border-radius: 10px; }
.drawer-nav a.active, .drawer-nav a:hover { color: var(--red); background: rgba(201,0,0,.08); font-weight: 800; }
.mobile-bottom-nav { display: none; }
body.drawer-open { overflow: hidden; }
@media (max-width: 1100px) {
    .site-shell { grid-template-columns: 190px minmax(0,1fr); gap: 20px; }
    .nav-core { gap: 12px; }
    .nav-core a { font-size: 14px; }
}
@media (max-width: 920px) {
    .container { width: min(100% - 24px, 760px); }
    .site-shell { display: block; }
    .side-category, .nav-core { display: none; }
    .menu-toggle { display: block; flex: 0 0 auto; }
    .header-inner { min-height: 64px; gap: 10px; }
    .logo { margin-right: auto; }
    .logo img { max-height: 44px; }
    .header-register { padding: 0 18px; min-height: 40px; }
    .site-main { padding-bottom: 88px; }
    .mobile-bottom-nav {
        position: fixed;
        z-index: 1000;
        left: 0;
        right: 0;
        bottom: 0;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        background: rgba(255,255,255,.97);
        border-top: 1px solid var(--line);
        box-shadow: 0 -8px 24px rgba(18,28,45,.08);
        padding-bottom: env(safe-area-inset-bottom);
    }
    .mobile-bottom-nav a { text-align: center; padding: 12px 4px; font-size: 13px; color: var(--muted); }
    .mobile-bottom-nav a.active { color: var(--red); font-weight: 900; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .summary-strip { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .summary-item:nth-child(2) { border-right: 0; }
    .summary-item:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.24); }
    .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .container { width: calc(100% - 20px); }
    .page-hero { padding: 24px 20px; margin-top: 18px; }
    .banner-slider { min-height: 150px; max-height: 210px; margin-top: 18px; border-radius: 16px; }
    .slides, .slide { min-height: 150px; }
    .banner-slider img { min-height: 150px; max-height: 210px; }
    .slider-arrow { width: 36px; height: 36px; font-size: 24px; }
    .slider-arrow.prev { left: 8px; }
    .slider-arrow.next { right: 8px; }
    .grid-2, .grid-3, .grid-4, .reviews, .split, .split.reverse { grid-template-columns: 1fr; }
    .split.reverse .split-media { order: 0; }
    .split-media img { height: 200px; }
    .summary-strip { grid-template-columns: 1fr; }
    .summary-item { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.24); }
    .summary-item:last-child { border-bottom: 0; }
    .section { margin: 28px 0; }
    .section-head { display: block; }
    .product-card img { height: 145px; }
    .zone-card img, .info-card img, .content-img { max-height: 190px; }
}