:root {
    --red: #C90000;
    --red-dark: #A80000;
    --red-soft: rgba(201, 0, 0, 0.08);
    --ink: #1F2329;
    --muted: #5D6673;
    --light: #F6F7F9;
    --panel: #F1F3F6;
    --line: rgba(201, 0, 0, 0.12);
    --shadow: 0 12px 30px rgba(18, 28, 45, 0.08);
    --radius: 18px;
    --header-height: 74px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: #FFFFFF;
    color: var(--ink);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
    padding-top: var(--header-height);
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
.site-header {
    position: fixed;
    inset: 0 0 auto 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(1440px, calc(100% - 32px));
    min-height: var(--header-height);
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
}
.logo img { max-height: 52px; width: auto; }
.nav-core {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    white-space: nowrap;
    flex-wrap: nowrap;
    min-width: 0;
}
.nav-core a {
    color: var(--ink);
    background: var(--light);
    border-radius: 999px;
    padding: 9px 16px;
    font-size: 15px;
    transition: .2s ease;
}
.nav-core a:hover, .nav-core a.active { color: var(--red); background: var(--red-soft); }
.main-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 42px;
    padding: 10px 22px;
    border-radius: 999px;
    background: linear-gradient(180deg, #F12B2B 0%, #C90000 55%, #A80000 100%);
    color: #FFFFFF;
    font-weight: 700;
    border: 0;
    box-shadow: 0 8px 18px rgba(201,0,0,.18);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 12px 24px rgba(201,0,0,.24); }
.header-register { flex: 0 0 auto; white-space: nowrap; }
.menu-toggle { display: none; width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--light); padding: 10px; }
.menu-toggle span { display: block; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; }
.site-shell {
    width: min(1440px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}
.side-category {
    position: sticky;
    top: 96px;
    margin-top: 24px;
    max-height: calc(100vh - 120px);
    overflow: auto;
    background: #FFFFFF;
    border: 1px solid rgba(201,0,0,0.10);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 18px 14px;
}
.side-category strong { display: block; padding: 0 10px 10px; color: var(--red); font-size: 15px; }
.side-category nav { display: grid; gap: 4px; }
.side-category a { color: var(--ink); border-radius: 12px; padding: 8px 10px; font-size: 14px; line-height: 1.4; }
.side-category a:hover, .side-category a.active { color: var(--red); background: var(--red-soft); }
.site-main { min-width: 0; padding: 24px 0 56px; }
.page-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
    gap: 30px;
    align-items: center;
    padding: 42px;
    border-radius: 24px;
    background: linear-gradient(135deg, #FFFFFF 0%, #F7F8FA 58%, #FCEEEE 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    margin-bottom: 28px;
}
.page-hero.no-image { grid-template-columns: 1fr; }
.eyebrow { color: var(--red); font-weight: 800; letter-spacing: .08em; font-size: 13px; }
h1, h2, h3, .section-title { color: var(--red); margin-top: 0; line-height: 1.35; }
h1 { font-size: clamp(30px, 4vw, 48px); margin-bottom: 16px; }
h2 { font-size: clamp(22px, 2.5vw, 32px); margin-bottom: 14px; }
h3 { font-size: 19px; margin-bottom: 10px; }
p { margin: 0 0 14px; }
.lead { font-size: 17px; color: var(--muted); }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.text-link { color: var(--red); font-weight: 700; display: inline-flex; align-items: center; gap: 6px; }
.hero-media, .content-media {
    min-height: 250px;
    max-height: 310px;
    border-radius: 20px;
    background: #F7F8FA;
    overflow: hidden;
    display: grid;
    place-items: center;
}
.hero-media img, .content-media img { width: 100%; height: 100%; max-height: 310px; object-fit: contain; }
.banner-slider {
    width: 100%;
    margin: 0 auto 30px;
    border-radius: 22px;
    background: #F7F8FA;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16 / 5;
    min-height: 260px;
    max-height: 360px;
}
.banner-track, .banner-slide { position: absolute; inset: 0; }
.banner-slide { opacity: 0; visibility: hidden; transition: opacity .5s ease; }
.banner-slide.active { opacity: 1; visibility: visible; }
.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%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,.65);
    background: rgba(17,21,28,.46);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    z-index: 3;
}
.slider-prev { left: 16px; }
.slider-next { right: 16px; }
.slider-dots { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
.slider-dot { width: 10px; height: 10px; border-radius: 50%; border: 0; background: rgba(255,255,255,.65); padding: 0; cursor: pointer; }
.slider-dot.active { background: var(--red); transform: scale(1.2); }
.section { margin: 30px 0; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 18px; }
.section-head p { max-width: 760px; color: var(--muted); margin: 0; }
.card, .zone-card, .info-card, .review-card, .faq-card {
    background: #FFFFFF;
    border: 1px solid rgba(201,0,0,0.10);
    box-shadow: var(--shadow);
    border-radius: 18px;
}
.card, .zone-card, .info-card, .review-card { padding: 22px; }
.card p, .zone-card p, .info-card p, .review-card p { color: var(--muted); }
.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)); }
.quick-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.quick-link { background: var(--light); border: 1px solid transparent; border-radius: 16px; padding: 18px; transition: .2s ease; }
.quick-link:hover { border-color: var(--line); background: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.quick-link strong { display: block; color: var(--red); margin-bottom: 6px; }
.quick-link span { color: var(--muted); font-size: 14px; }
.summary-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0,1fr));
    gap: 1px;
    background: rgba(255,255,255,.18);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
}
.summary-item { color: #fff; background: linear-gradient(160deg, #DC1F1F, #A80000); padding: 24px; min-height: 150px; }
.summary-item strong { display: block; font-size: 20px; margin-bottom: 8px; }
.summary-item p { color: rgba(255,255,255,.86); margin: 0; font-size: 14px; }
.split-section { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .78fr); gap: 24px; align-items: center; }
.split-section.reverse { grid-template-columns: minmax(320px, .78fr) minmax(0, 1fr); }
.split-section.reverse .content-media { order: -1; }
.content-copy { padding: 10px 0; }
.content-list { margin: 16px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.content-list li { position: relative; padding-left: 22px; color: var(--muted); }
.content-list li::before { content: ""; position: absolute; left: 0; top: .68em; width: 8px; height: 8px; border-radius: 50%; background: var(--red); }
.product-row { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(220px, 1fr); gap: 16px; overflow-x: auto; padding: 4px 4px 18px; scroll-snap-type: x mandatory; }
.product-card { scroll-snap-align: start; background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; box-shadow: var(--shadow); }
.product-card img { width: 100%; height: 170px; object-fit: contain; background: #F7F8FA; }
.product-card div { padding: 18px; }
.product-card p { color: var(--muted); font-size: 14px; }
.notice-panel { margin: 30px 0 0; padding: 22px 24px; border-left: 4px solid var(--red); background: #FFF7F7; border-radius: 0 16px 16px 0; }
.notice-panel strong { color: var(--red); }
.review-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.review-card { position: relative; padding-top: 28px; }
.review-card::before { content: "“"; position: absolute; top: 0; left: 18px; color: rgba(201,0,0,.18); font-size: 56px; line-height: 1; font-family: Georgia, serif; }
.review-card strong { color: var(--ink); }
.faq-list { display: grid; gap: 12px; }
.faq-card { padding: 0 20px; }
.faq-card summary { cursor: pointer; color: var(--ink); font-weight: 700; padding: 18px 30px 18px 0; position: relative; list-style: none; }
.faq-card summary::-webkit-details-marker { display: none; }
.faq-card summary::after { content: "+"; position: absolute; right: 0; color: var(--red); font-size: 24px; top: 12px; }
.faq-card[open] summary::after { content: "−"; }
.faq-card p { color: var(--muted); padding: 0 0 18px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.stat-card { padding: 22px; border-radius: 16px; background: var(--light); }
.stat-card strong { display: block; color: var(--red); font-size: 24px; }
.tag-list { display: flex; gap: 10px; flex-wrap: wrap; }
.tag { display: inline-flex; padding: 7px 12px; border-radius: 999px; color: var(--red); background: var(--red-soft); font-size: 14px; }
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { position: relative; padding: 20px 20px 20px 68px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 18px; top: 18px; width: 34px; height: 34px; border-radius: 50%; background: var(--red); color: #fff; display: grid; place-items: center; font-weight: 800; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid #ECEFF3; }
th { color: var(--red); background: #FFF7F7; }
.site-footer { background: #11151C; color: #E7ECF3; padding: 46px 0 24px; }
.footer-grid { width: min(1180px, calc(100% - 32px)); margin: 0 auto; display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 44px; }
.footer-brand img { max-height: 52px; width: auto; margin-bottom: 16px; }
.footer-brand p { color: #AFB8C5; max-width: 560px; }
.site-footer h2 { color: #fff; font-size: 17px; }
.site-footer a { display: block; color: #C9D0DA; margin: 8px 0; }
.site-footer a:hover { color: #fff; }
.footer-notice { width: min(1180px, calc(100% - 32px)); margin: 28px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: #929CAA; font-size: 13px; }
.footer-notice p:last-child { margin-bottom: 0; }
.mobile-drawer { position: fixed; top: 0; bottom: 0; left: 0; width: min(84vw, 320px); background: #fff; z-index: 1300; transform: translateX(-102%); transition: transform .24s ease; box-shadow: 18px 0 40px rgba(17,21,28,.18); overflow-y: auto; }
.mobile-drawer.open { transform: translateX(0); }
.drawer-overlay { position: fixed; inset: 0; background: rgba(17,21,28,.42); opacity: 0; transition: opacity .22s ease; z-index: 1200; }
.drawer-overlay.show { opacity: 1; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 16px; border-bottom: 1px solid #ECEFF3; }
.drawer-logo img { max-height: 46px; width: auto; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 50%; background: var(--light); color: var(--ink); font-size: 28px; line-height: 1; }
.drawer-nav { padding: 12px; display: grid; gap: 4px; }
.drawer-nav a { padding: 12px 14px; border-radius: 12px; }
.drawer-nav a.active, .drawer-nav a:hover { color: var(--red); background: var(--red-soft); }
.mobile-bottom-nav { display: none; }
@media (max-width: 1180px) {
    .site-shell { grid-template-columns: 190px minmax(0,1fr); gap: 20px; }
    .card-grid.four { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .summary-strip { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 980px) {
    .header-inner { grid-template-columns: auto 1fr auto; gap: 14px; }
    .menu-toggle { display: block; }
    .logo { justify-self: center; }
    .nav-core { display: none; }
    .site-shell { display: block; width: min(100% - 28px, 920px); }
    .side-category { display: none; }
    .page-hero, .split-section, .split-section.reverse { grid-template-columns: 1fr; }
    .split-section.reverse .content-media { order: 0; }
    .card-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .quick-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 24px; }
}
@media (max-width: 640px) {
    :root { --header-height: 66px; }
    body { padding-bottom: 68px; }
    .header-inner { width: calc(100% - 20px); min-height: var(--header-height); }
    .logo img { max-height: 44px; }
    .header-register { min-height: 38px; padding: 8px 16px; }
    .site-main { padding-top: 16px; }
    .banner-slider { min-height: 150px; max-height: 210px; aspect-ratio: 16 / 7; border-radius: 16px; margin-bottom: 20px; }
    .slider-arrow { width: 36px; height: 36px; font-size: 20px; }
    .page-hero { padding: 26px 20px; gap: 20px; border-radius: 18px; }
    h1 { font-size: 30px; }
    h2 { font-size: 24px; }
    .hero-media, .content-media { min-height: 180px; max-height: 230px; }
    .hero-media img, .content-media img { max-height: 230px; }
    .section { margin: 24px 0; }
    .section-head { display: block; }
    .card-grid, .card-grid.two, .card-grid.four, .quick-grid, .summary-strip, .review-grid, .stats-grid { grid-template-columns: 1fr; }
    .card, .zone-card, .info-card, .review-card { padding: 18px; }
    .summary-item { min-height: auto; padding: 20px; }
    .product-card img { height: 150px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-grid > div:not(.footer-brand) { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 14px; }
    .footer-grid h2 { grid-column: 1 / -1; }
    .mobile-bottom-nav { position: fixed; inset: auto 0 0 0; z-index: 1100; height: 64px; display: grid; grid-template-columns: repeat(4, 1fr); background: rgba(255,255,255,.98); border-top: 1px solid #E5E8EC; 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 span { font-size: 18px; line-height: 1; }
    .mobile-bottom-nav a.active { color: var(--red); }
}
@media (max-width: 420px) {
    .header-inner { gap: 8px; }
    .menu-toggle { width: 38px; height: 38px; padding: 8px; }
    .logo img { max-width: 118px; }
    .header-register { padding: 8px 13px; font-size: 14px; }
}