* { box-sizing: border-box; }
:root {
    --red: #C90000;
    --red-dark: #A80000;
    --red-soft: rgba(201, 0, 0, 0.08);
    --text: #1F2329;
    --muted: #5D6673;
    --light: #F6F7F9;
    --line: rgba(201, 0, 0, 0.12);
    --shadow: 0 12px 30px rgba(18, 28, 45, 0.08);
    --radius: 18px;
}
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;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, input, textarea, select { font: inherit; }
.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 {
    width: min(1240px, calc(100% - 32px));
    min-height: 74px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.logo { display: inline-flex; align-items: center; flex: 0 0 auto; }
.logo img { display: block; width: auto; max-width: 168px; max-height: 52px; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 10px; white-space: nowrap; flex-wrap: nowrap; min-width: 0; }
.nav-core a { padding: 9px 15px; border-radius: 999px; background: var(--light); color: var(--text); 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: 44px; padding: 10px 22px; border-radius: 999px; color: #fff; font-weight: 800; background: linear-gradient(180deg, #F12B2B 0%, #C90000 55%, #A80000 100%); box-shadow: 0 8px 18px rgba(201,0,0,.2); transition: transform .2s ease, box-shadow .2s ease; }
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 12px 22px rgba(201,0,0,.25); }
.header-register { flex: 0 0 auto; }
.menu-toggle { display: none; width: 42px; height: 42px; border: 0; background: var(--light); border-radius: 12px; padding: 9px; }
.menu-toggle span { display: block; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; }
.site-shell { width: min(1320px, calc(100% - 32px)); margin: 0 auto; display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 28px; align-items: start; }
.side-category { position: sticky; top: 96px; margin: 24px 0 48px; padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); max-height: calc(100vh - 118px); overflow-y: auto; }
.side-title { padding: 8px 10px 12px; color: var(--red); font-weight: 900; letter-spacing: .05em; }
.side-category a { display: block; padding: 8px 10px; margin: 2px 0; color: var(--text); 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: 64px; }
.banner-slider { position: relative; min-height: 260px; max-height: 360px; margin: 24px auto 34px; border-radius: 22px; overflow: hidden; background: #F7F8FA; box-shadow: var(--shadow); }
.banner-slides { height: clamp(260px, 27vw, 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 { display: block; width: 100%; height: 100%; object-fit: contain; background: #F7F8FA; }
.banner-prev, .banner-next { position: absolute; top: 50%; transform: translateY(-50%); width: 42px; height: 42px; border: 0; border-radius: 50%; background: rgba(255,255,255,.86); color: var(--red); font-size: 28px; line-height: 1; cursor: pointer; box-shadow: 0 6px 18px rgba(0,0,0,.12); }
.banner-prev { left: 16px; }
.banner-next { right: 16px; }
.banner-dots { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 8px; }
.banner-dot { width: 9px; height: 9px; border: 0; border-radius: 50%; background: rgba(255,255,255,.7); cursor: pointer; padding: 0; box-shadow: 0 0 0 1px rgba(0,0,0,.08); }
.banner-dot.active { width: 24px; border-radius: 999px; background: var(--red); }
.banner-caption, .banner-text, .slide-title, .slide-desc, .slide-content, .slide-card, .banner-card { display: none !important; }
.page-hero { margin: 24px 0 28px; padding: clamp(28px, 5vw, 56px); border: 1px solid var(--line); border-radius: 24px; background: linear-gradient(135deg, #fff 0%, #f7f8fa 100%); box-shadow: var(--shadow); }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); gap: 34px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; min-height: 30px; padding: 4px 12px; border-radius: 999px; background: var(--red-soft); color: var(--red); font-weight: 800; font-size: 14px; }
h1, h2, h3, .section-title { color: var(--red); line-height: 1.3; }
h1 { margin: 14px 0 16px; font-size: clamp(32px, 5vw, 54px); }
h2 { margin: 0 0 14px; font-size: clamp(24px, 3vw, 34px); }
h3 { margin: 0 0 10px; font-size: 20px; }
p { margin: 0 0 14px; }
.lead { color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--red); font-weight: 800; }
.hero-media { padding: 14px; border-radius: 20px; background: #fff; border: 1px solid rgba(18,28,45,.06); }
.hero-media img, .content-img { display: block; width: 100%; height: auto; max-height: 280px; object-fit: contain; border-radius: 16px; background: #F7F8FA; }
.section { margin: 28px 0; padding: clamp(24px, 4vw, 38px); border-radius: 22px; background: #fff; border: 1px solid rgba(201,0,0,.08); box-shadow: var(--shadow); }
.section.alt { background: #F6F7F9; box-shadow: none; border-color: rgba(18,28,45,.05); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.section-head p { max-width: 680px; color: var(--muted); }
.grid-2, .grid-3, .grid-4 { display: grid; gap: 18px; }
.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)); }
.card, .zone-card, .info-card, .review-card { background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 18px; padding: 20px; }
.card p, .zone-card p, .info-card p, .review-card p { color: var(--muted); }
.card img, .zone-card img, .info-card img { display: block; width: 100%; height: 180px; object-fit: contain; background: #F7F8FA; border-radius: 14px; margin-bottom: 16px; }
.product-scroll { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(230px, 1fr); gap: 16px; overflow-x: auto; padding-bottom: 8px; scroll-snap-type: x proximity; }
.product-card { scroll-snap-align: start; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 14px; box-shadow: var(--shadow); }
.product-card img { display: block; width: 100%; height: 170px; object-fit: contain; background: #F7F8FA; border-radius: 13px; margin-bottom: 14px; }
.service-strip { margin: 28px 0; display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; border-radius: 22px; overflow: hidden; background: rgba(255,255,255,.25); box-shadow: var(--shadow); }
.service-strip article { padding: 24px; color: #fff; background: linear-gradient(160deg, #DF1717, #A80000); }
.service-strip h2, .service-strip h3 { color: #fff; }
.quick-links { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.quick-links a { display: block; padding: 18px; border-radius: 16px; border: 1px solid var(--line); background: #fff; transition: .2s ease; }
.quick-links a:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.quick-links strong { display: block; color: var(--red); margin-bottom: 4px; }
.quick-links span { color: var(--muted); font-size: 14px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .8fr); gap: 28px; align-items: center; }
.notice { padding: 18px 20px; border-left: 4px solid var(--red); background: var(--red-soft); border-radius: 0 14px 14px 0; color: #4B2525; }
.list-clean { margin: 0; padding: 0; list-style: none; }
.list-clean li { position: relative; padding: 9px 0 9px 22px; border-bottom: 1px dashed rgba(18,28,45,.1); }
.list-clean li::before { content: ""; position: absolute; left: 2px; top: 18px; width: 8px; height: 8px; border-radius: 50%; background: var(--red); }
.review-card blockquote { margin: 0; color: var(--muted); }
.review-card footer { margin-top: 14px; color: var(--red); font-weight: 800; }
.faq-list { display: grid; gap: 12px; }
details { border: 1px solid var(--line); border-radius: 16px; background: #fff; padding: 0 18px; }
summary { cursor: pointer; padding: 16px 0; color: var(--red); font-weight: 800; }
details p { padding: 0 0 16px; color: var(--muted); }
.cta-band { margin: 30px 0; padding: 28px; border-radius: 22px; background: #11151C; color: #E7ECF3; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.cta-band h2 { color: #fff; }
.site-footer { background: #11151C; color: #E7ECF3; }
.footer-grid { width: min(1240px, calc(100% - 32px)); margin: 0 auto; padding: 52px 0 34px; display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 34px; }
.site-footer h2 { color: #fff; font-size: 18px; }
.site-footer a { display: block; margin: 8px 0; color: #D4DAE3; }
.site-footer a:hover { color: #fff; }
.site-footer p { color: #AEB7C4; }
.footer-brand img { display: block; max-width: 170px; max-height: 52px; margin-bottom: 18px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 16px; text-align: center; color: #8D97A5; }
.mobile-bottom-nav { display: none; }
.mobile-drawer, .drawer-mask { display: none; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { padding: 14px 16px; border-bottom: 1px solid rgba(18,28,45,.09); text-align: left; }
th { color: var(--red); background: #F8F9FB; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.form-field { display: grid; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
label { font-weight: 800; }
input, textarea, select { width: 100%; border: 1px solid rgba(18,28,45,.16); border-radius: 12px; padding: 12px 14px; background: #fff; color: var(--text); }
textarea { min-height: 140px; resize: vertical; }

@media (max-width: 1120px) {
    .site-shell { grid-template-columns: 1fr; }
    .side-category { display: none; }
    .nav-core { gap: 6px; }
    .nav-core a { padding: 8px 12px; }
}
@media (max-width: 860px) {
    body { padding-bottom: 72px; }
    .header-inner { width: min(100% - 20px, 760px); min-height: 66px; gap: 10px; }
    .menu-toggle { display: block; flex: 0 0 auto; }
    .logo { margin: 0 auto; }
    .logo img { max-width: 126px; max-height: 44px; }
    .nav-core { display: none; }
    .header-register { min-height: 40px; padding: 8px 15px; }
    .site-shell { width: min(100% - 20px, 760px); }
    .page-hero-grid, .split { grid-template-columns: 1fr; }
    .hero-media { order: -1; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .service-strip { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .quick-links { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .mobile-bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 1200; height: 64px; display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border-top: 1px solid rgba(18,28,45,.12); padding-bottom: env(safe-area-inset-bottom); }
    .mobile-bottom-nav a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: var(--muted); font-size: 12px; }
    .mobile-bottom-nav a.active { color: var(--red); font-weight: 800; }
    .mobile-bottom-nav span { font-size: 15px; font-weight: 900; }
    .drawer-mask { display: block; position: fixed; inset: 0; z-index: 1300; background: rgba(17,21,28,.48); opacity: 0; visibility: hidden; transition: .25s ease; }
    .mobile-drawer { display: block; position: fixed; left: 0; top: 0; bottom: 0; z-index: 1310; width: 84%; max-width: 320px; background: #fff; transform: translateX(-104%); transition: transform .25s ease; overflow-y: auto; box-shadow: 18px 0 45px rgba(0,0,0,.18); }
    .drawer-open { overflow: hidden; }
    .drawer-open .drawer-mask { opacity: 1; visibility: visible; }
    .drawer-open .mobile-drawer { transform: translateX(0); }
    .drawer-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; padding: 14px; border-bottom: 1px solid rgba(18,28,45,.1); background: #fff; }
    .drawer-logo img { display: block; max-width: 130px; max-height: 44px; }
    .drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--light); color: var(--red); font-size: 28px; line-height: 1; }
    .drawer-nav { padding: 12px; }
    .drawer-nav a { display: block; padding: 11px 13px; margin: 2px 0; border-radius: 12px; }
    .drawer-nav a:hover, .drawer-nav a.active { color: var(--red); background: var(--red-soft); }
}
@media (max-width: 620px) {
    .banner-slider { min-height: 150px; max-height: 210px; margin-top: 16px; border-radius: 16px; }
    .banner-slides { height: clamp(150px, 44vw, 210px); }
    .banner-prev, .banner-next { width: 34px; height: 34px; font-size: 22px; }
    .banner-prev { left: 8px; }
    .banner-next { right: 8px; }
    .page-hero, .section { padding: 22px 18px; border-radius: 18px; }
    h1 { font-size: 32px; }
    h2 { font-size: 25px; }
    .grid-2, .grid-3, .grid-4, .service-strip, .quick-links, .footer-grid, .form-grid { grid-template-columns: 1fr; }
    .card img, .zone-card img, .info-card img { height: 150px; }
    .product-scroll { grid-auto-columns: 82%; }
    .product-card img { height: 150px; }
    .hero-media img, .content-img { max-height: 230px; }
    .cta-band { align-items: flex-start; flex-direction: column; }
    .footer-grid { padding-top: 40px; }
}