:root {
    --red: #c90000;
    --red-dark: #a80000;
    --red-soft: rgba(201, 0, 0, .08);
    --ink: #1f2329;
    --muted: #5d6673;
    --light: #f6f7f9;
    --line: rgba(201, 0, 0, .12);
    --shadow: 0 12px 30px rgba(18, 28, 45, .08);
    --radius: 18px;
    --header-h: 74px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #fff; color: var(--ink); font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, input, textarea { font: inherit; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 1000; background: rgba(255,255,255,.96); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(201,0,0,.08); }
.header-inner { max-width: 1380px; min-height: var(--header-h); margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { flex: 0 0 auto; display: flex; align-items: center; }
.logo img { display: block; width: auto; max-width: 170px; max-height: 52px; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: nowrap; white-space: nowrap; }
.nav-core a { color: var(--ink); background: var(--light); border-radius: 999px; padding: 9px 16px; font-weight: 700; transition: .2s ease; }
.nav-core a:hover, .nav-core a.active { color: var(--red); background: var(--red-soft); }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 9px 22px; color: #fff; background: linear-gradient(180deg,#f12b2b 0%,#c90000 55%,#a80000 100%); border-radius: 999px; border: 0; font-weight: 800; box-shadow: 0 10px 20px rgba(201,0,0,.18); transition: transform .2s ease, box-shadow .2s ease; }
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 14px 24px rgba(201,0,0,.24); }
.header-register { flex: 0 0 auto; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 9px; border: 1px solid var(--line); background: #fff; border-radius: 12px; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--ink); border-radius: 2px; }
.site-shell { width: min(1460px, calc(100% - 32px)); margin: 0 auto; padding-top: calc(var(--header-h) + 22px); display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 28px; align-items: start; }
.side-category { position: sticky; top: 96px; max-height: calc(100vh - 116px); overflow: auto; padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); scrollbar-width: thin; }
.side-category-title { padding: 8px 10px 12px; color: var(--red); font-weight: 900; font-size: 16px; }
.side-category nav { display: grid; gap: 4px; }
.side-category a { display: block; padding: 8px 10px; color: var(--ink); border-radius: 12px; font-size: 14px; }
.side-category a:hover, .side-category a.active { color: var(--red); background: var(--red-soft); }
.site-main { min-width: 0; padding-bottom: 52px; }
.banner-slider { position: relative; min-height: 260px; max-height: 360px; margin: 0 auto 34px; overflow: hidden; background: #f7f8fa; border-radius: 22px; box-shadow: var(--shadow); }
.slide { display: none; width: 100%; height: 100%; }
.slide.active { display: block; }
.banner-slider img { display: block; width: 100%; height: clamp(260px, 28vw, 360px); object-fit: contain; background: #f7f8fa; }
.banner-arrow { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border: 0; border-radius: 50%; background: rgba(17,21,28,.68); color: #fff; font-size: 26px; line-height: 1; cursor: pointer; }
.banner-arrow.prev { left: 18px; }
.banner-arrow.next { right: 18px; }
.banner-dots { position: absolute; left: 50%; bottom: 15px; transform: translateX(-50%); display: flex; gap: 8px; }
.banner-dot { width: 10px; height: 10px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: rgba(255,255,255,.45); cursor: pointer; }
.banner-dot.active { background: var(--red); }
.banner-caption,.banner-text,.slide-title,.slide-desc,.slide-content,.slide-card,.banner-card { display: none !important; }
.hero-panel, .section-block, .inner-hero, .card, .zone-card, .info-card, .review-card, .faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-panel, .inner-hero { padding: clamp(26px, 4vw, 48px); margin-bottom: 30px; }
.hero-panel-grid, .inner-hero-grid, .split { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr); gap: 30px; align-items: center; }
.eyebrow { display: inline-flex; color: var(--red); background: var(--red-soft); border-radius: 999px; padding: 5px 12px; font-weight: 800; font-size: 14px; }
h1,h2,h3,.section-title { color: var(--red); line-height: 1.25; }
h1 { margin: 15px 0 14px; font-size: clamp(30px, 4vw, 52px); }
h2 { margin: 0 0 14px; font-size: clamp(23px, 2.5vw, 34px); }
h3 { margin: 0 0 10px; font-size: 20px; }
p { margin: 0 0 14px; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--red); font-weight: 800; }
.text-link::after { content: "→"; }
.content-img-wrap { padding: 14px; background: var(--light); border-radius: var(--radius); }
.content-img, .zone-card img, .info-card img { display: block; width: 100%; max-height: 260px; object-fit: contain; background: var(--light); border-radius: 14px; }
.section-block { padding: clamp(24px, 3vw, 38px); margin: 0 0 28px; }
.section-head { max-width: 760px; margin-bottom: 22px; }
.section-head p { margin-bottom: 0; }
.grid-2, .grid-3, .grid-4, .category-grid, .review-grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .zone-card, .info-card, .review-card { padding: 22px; }
.card p:last-child, .review-card p:last-child { margin-bottom: 0; }
.card-number { display: inline-flex; min-width: 34px; height: 34px; align-items: center; justify-content: center; margin-bottom: 12px; color: #fff; background: var(--red); border-radius: 10px; font-weight: 900; }
.service-summary { padding: 28px; margin: 0 0 28px; color: #fff; background: linear-gradient(135deg,#d71717,#a80000); border-radius: 22px; box-shadow: 0 14px 28px rgba(201,0,0,.22); }
.service-summary .grid-4 { gap: 14px; }
.service-summary article { padding: 18px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2); border-radius: 16px; }
.service-summary h2, .service-summary h3, .service-summary p { color: #fff; }
.horizontal-scroll { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(210px, 1fr); gap: 18px; overflow-x: auto; padding: 4px 2px 12px; scroll-snap-type: x mandatory; }
.product-card { scroll-snap-align: start; padding: 16px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.product-card img { width: 100%; height: 170px; object-fit: contain; background: #f7f8fa; border-radius: 12px; }
.product-card h3 { margin-top: 14px; }
.notice-box { padding: 22px; border-left: 4px solid var(--red); background: #fff6f6; border-radius: 0 16px 16px 0; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px 22px; }
.faq-item summary { color: var(--ink); font-weight: 850; cursor: pointer; }
.faq-item p { margin: 12px 0 0; }
.quote { position: relative; padding-left: 20px; }
.quote::before { content: "“"; position: absolute; left: 0; top: -8px; color: var(--red); font-size: 34px; font-weight: 900; }
.site-footer { background: #11151c; color: #e7ecf3; padding: 48px 24px 26px; }
.footer-grid { width: min(1180px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1.5fr .75fr .75fr; gap: 34px; }
.footer-brand img { width: auto; max-width: 170px; max-height: 52px; margin-bottom: 16px; }
.site-footer h2 { color: #fff; font-size: 18px; }
.site-footer p { color: #b7c0cc; }
.site-footer a { display: block; color: #d8dee7; margin: 7px 0; }
.site-footer a:hover { color: #fff; }
.footer-notice, .footer-copy { width: min(1180px, 100%); margin: 28px auto 0; color: #aeb7c4; font-size: 14px; }
.footer-copy { margin-top: 12px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.1); }
.mobile-drawer, .drawer-overlay { display: none; }
.mobile-bottom-nav { display: none; }
@media (max-width: 1180px) {
    .site-shell { grid-template-columns: 180px minmax(0, 1fr); gap: 20px; }
    .header-inner { gap: 14px; }
    .nav-core { gap: 6px; }
    .nav-core a { padding: 8px 12px; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 920px) {
    :root { --header-h: 66px; }
    body { padding-bottom: 68px; }
    .header-inner { padding: 0 14px; display: grid; grid-template-columns: 48px minmax(0,1fr) auto; gap: 10px; }
    .menu-toggle { display: block; }
    .logo { justify-self: center; }
    .logo img { max-width: 142px; max-height: 44px; }
    .nav-core { display: none; }
    .header-register { min-height: 38px; padding: 7px 16px; }
    .site-shell { width: min(100% - 24px, 820px); display: block; padding-top: calc(var(--header-h) + 16px); }
    .side-category { display: none; }
    .hero-panel-grid, .inner-hero-grid, .split { grid-template-columns: 1fr; }
    .content-img-wrap { order: -1; }
    .category-grid, .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .mobile-drawer { display: block; position: fixed; z-index: 1200; inset: 0 auto 0 0; width: min(84vw, 320px); padding: 16px; overflow-y: auto; background: #fff; transform: translateX(-105%); transition: transform .25s ease; box-shadow: 14px 0 30px rgba(18,28,45,.15); }
    .drawer-overlay { display: block; position: fixed; z-index: 1150; inset: 0; background: rgba(17,21,28,.45); opacity: 0; visibility: hidden; transition: .25s ease; }
    .drawer-open { overflow: hidden; }
    .drawer-open .mobile-drawer { transform: translateX(0); }
    .drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
    .drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-bottom: 14px; border-bottom: 1px solid #edf0f4; }
    .drawer-logo img { width: auto; max-width: 150px; max-height: 46px; }
    .drawer-close { width: 38px; height: 38px; border: 1px solid var(--line); background: #fff; border-radius: 12px; color: var(--ink); font-size: 26px; }
    .drawer-nav { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; padding-top: 16px; }
    .drawer-nav a { padding: 10px 11px; background: var(--light); border-radius: 11px; font-size: 14px; }
    .drawer-nav a.active { color: var(--red); background: var(--red-soft); font-weight: 800; }
    .mobile-bottom-nav { display: grid; position: fixed; z-index: 1000; inset: auto 0 0; grid-template-columns: repeat(4, 1fr); min-height: 62px; padding-bottom: env(safe-area-inset-bottom); background: #fff; border-top: 1px solid #e5e9ef; box-shadow: 0 -8px 20px rgba(18,28,45,.07); }
    .mobile-bottom-nav a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: #687180; font-size: 12px; }
    .mobile-bottom-nav a span { font-weight: 900; }
    .mobile-bottom-nav a.active { color: var(--red); }
    .site-footer { padding-bottom: 90px; }
}
@media (max-width: 640px) {
    .banner-slider { min-height: 150px; margin-bottom: 22px; border-radius: 16px; }
    .banner-slider img { height: clamp(150px, 52vw, 210px); }
    .banner-arrow { width: 36px; height: 36px; font-size: 22px; }
    .banner-arrow.prev { left: 10px; }
    .banner-arrow.next { right: 10px; }
    .hero-panel, .inner-hero, .section-block { padding: 22px; border-radius: 16px; }
    h1 { font-size: 31px; }
    h2 { font-size: 24px; }
    .grid-2, .grid-3, .grid-4, .category-grid, .review-grid { grid-template-columns: 1fr; }
    .service-summary { padding: 22px; }
    .content-img, .zone-card img, .info-card img { max-height: 210px; }
    .product-card img { height: 145px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}