:root {
    --red: #C90000;
    --red-dark: #A80000;
    --red-soft: rgba(201, 0, 0, .08);
    --text: #1F2329;
    --muted: #5D6673;
    --light-text: #8A93A0;
    --line: rgba(201, 0, 0, .12);
    --soft: #F6F7F9;
    --soft-2: #F1F3F6;
    --footer: #11151C;
    --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: #FFFFFF;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.72;
    padding-top: var(--header-h);
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
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 {
    width: min(1440px, calc(100% - 32px));
    min-height: var(--header-h);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
}
.logo { display: inline-flex; align-items: center; width: fit-content; }
.logo img { width: auto; max-width: 168px; max-height: 52px; object-fit: contain; }
.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 16px; border-radius: 999px; background: var(--soft); color: var(--text); font-weight: 650; 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: 10px 22px; border-radius: 999px; background: linear-gradient(180deg, #F12B2B 0%, #C90000 55%, #A80000 100%); color: #FFFFFF; font-weight: 750; 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 24px rgba(201,0,0,.24); }
.header-register { justify-self: end; white-space: nowrap; }
.menu-toggle { display: none; width: 42px; height: 42px; border: 0; background: var(--soft); border-radius: 12px; padding: 10px; }
.menu-toggle span { display: block; height: 2px; background: var(--text); margin: 5px 0; border-radius: 3px; }
.page-frame { width: min(1440px, calc(100% - 32px)); margin: 0 auto; display: grid; grid-template-columns: 188px minmax(0, 1fr); gap: 28px; align-items: start; }
.side-category { position: sticky; top: calc(var(--header-h) + 20px); margin-top: 24px; max-height: calc(100vh - var(--header-h) - 40px); overflow: auto; background: #FFFFFF; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 14px; }
.side-category strong { display: block; color: var(--red); padding: 6px 10px 10px; font-size: 15px; }
.side-category nav { display: grid; gap: 5px; }
.side-category a { padding: 8px 10px; border-radius: 10px; color: var(--text); font-size: 14px; line-height: 1.35; }
.side-category a:hover, .side-category a.active { color: var(--red); background: var(--red-soft); }
.site-main { min-width: 0; }
.section-space { margin: 34px 0; }
.soft-panel { background: var(--soft); border-radius: 24px; padding: clamp(24px, 4vw, 42px); }
.eyebrow, .section-kicker { display: inline-block; color: var(--red); font-weight: 760; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
h1, h2, h3, .section-title { color: var(--red); line-height: 1.25; margin-top: 0; }
h1 { font-size: clamp(30px, 4.5vw, 52px); margin-bottom: 18px; letter-spacing: -.03em; }
h2 { font-size: clamp(24px, 3vw, 36px); margin-bottom: 14px; }
h3 { font-size: 19px; margin-bottom: 8px; }
p { margin-top: 0; color: var(--muted); }
.section-heading { max-width: 760px; margin-bottom: 24px; }
.section-heading > p { font-size: 17px; }
.text-link { color: var(--red); font-weight: 720; display: inline-flex; align-items: center; gap: 6px; }
.text-link::after { content: "→"; }
.centered-link { margin: 20px auto 0; width: fit-content; display: flex; }
.hero-actions, .inline-links { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.inline-links a { color: var(--red); font-weight: 700; border-bottom: 1px solid rgba(201,0,0,.28); }
.banner-slider { margin: 24px auto 34px; border-radius: 22px; background: #F7F8FA; box-shadow: var(--shadow); overflow: hidden; position: relative; min-height: 260px; height: clamp(260px, 30vw, 360px); }
.banner-track { width: 100%; height: 100%; position: relative; }
.banner-slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .5s 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%; transform: translateY(-50%); z-index: 3; 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: 28px; cursor: pointer; display: grid; place-items: center; }
.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: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); cursor: pointer; }
.slider-dot.active { background: var(--red); box-shadow: 0 0 0 4px rgba(255,255,255,.72); }
.home-intro, .inner-hero, .feature-split { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr); gap: clamp(26px, 5vw, 64px); align-items: center; }
.home-intro-copy > p, .inner-hero-copy > p { font-size: 17px; max-width: 760px; }
.home-intro-media, .inner-hero-media, .feature-split figure { margin: 0; background: var(--soft); border-radius: 22px; box-shadow: var(--shadow); overflow: hidden; min-height: 250px; display: grid; place-items: center; }
.home-intro-media img, .inner-hero-media img, .feature-split img { width: 100%; height: 100%; max-height: 300px; object-fit: contain; background: var(--soft); }
.service-summary { background: linear-gradient(135deg, #C90000, #A80000); border-radius: 24px; padding: 26px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; overflow: hidden; box-shadow: 0 16px 36px rgba(201,0,0,.18); }
.service-summary article { padding: 20px; border-right: 1px solid rgba(255,255,255,.18); }
.service-summary article:last-child { border-right: 0; }
.service-summary strong { color: #fff; font-size: 20px; display: block; margin-bottom: 6px; }
.service-summary p { color: rgba(255,255,255,.82); margin-bottom: 0; font-size: 14px; }
.quick-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.quick-grid a { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); transition: .2s ease; }
.quick-grid a:hover { transform: translateY(-3px); border-color: rgba(201,0,0,.25); }
.quick-grid strong { display: block; color: var(--red); font-size: 18px; margin-bottom: 6px; }
.quick-grid span { color: var(--muted); font-size: 14px; }
.feature-split.reverse figure { order: 2; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.compact-grid { margin-top: 22px; }
.card, .zone-card, .info-card, .review-card, .step-card { background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: var(--radius); }
.info-card { padding: 22px; }
.info-card p { margin-bottom: 0; font-size: 15px; }
.product-overview-grid { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 16px; }
.zone-card { overflow: hidden; }
.zone-card img { width: 100%; height: 150px; object-fit: contain; background: #F7F8FA; }
.zone-card div { padding: 16px; }
.zone-card h3 { font-size: 18px; }
.zone-card p { font-size: 14px; margin-bottom: 0; }
.horizontal-scroll { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(190px, 1fr); gap: 16px; overflow-x: auto; padding: 2px 2px 12px; scrollbar-width: thin; }
.product-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; min-width: 0; }
.product-card img { width: 100%; height: 170px; object-fit: contain; background: #F7F8FA; border-radius: 12px; }
.product-card h3 { margin: 14px 0 6px; }
.product-card p { margin-bottom: 0; font-size: 14px; }
.triple-zone { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.triple-zone article { border: 1px solid var(--line); border-radius: 22px; padding: 18px; box-shadow: var(--shadow); }
.triple-zone img { width: 100%; height: 190px; object-fit: contain; background: var(--soft); border-radius: 14px; }
.triple-zone h2 { font-size: 22px; margin-top: 16px; }
.triple-zone a { color: var(--red); font-weight: 700; }
.two-column { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; }
.notice-card, .security-card { border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); overflow: hidden; display: grid; grid-template-columns: 180px 1fr; align-items: center; min-height: 230px; }
.notice-card img { width: 100%; height: 100%; object-fit: contain; background: var(--soft); }
.notice-card div, .security-card div { padding: 24px; }
.security-card { grid-template-columns: 120px 1fr; padding-left: 20px; }
.security-icon { width: 76px; height: 76px; border-radius: 50%; background: var(--red-soft); color: var(--red); display: grid; place-items: center; font-size: 38px; font-weight: 800; }
.review-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.review-card { margin: 0; padding: 22px; }
.review-card p { font-size: 16px; color: var(--text); }
.review-card footer { color: var(--light-text); font-size: 13px; }
.faq-list { display: grid; gap: 12px; }
.faq-list details { border: 1px solid rgba(201,0,0,.1); border-radius: 14px; background: #fff; padding: 0 18px; }
.faq-list summary { cursor: pointer; color: var(--text); font-weight: 700; padding: 16px 28px 16px 0; position: relative; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 0; top: 11px; color: var(--red); font-size: 24px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { padding: 0 0 16px; margin: 0; }
.about-summary { display: grid; grid-template-columns: .8fr 1.4fr auto; gap: 28px; align-items: center; }
.about-summary p { margin-bottom: 0; }
.about-summary a { color: var(--red); font-weight: 700; white-space: nowrap; }
.inner-hero { min-height: 360px; padding-top: 10px; }
.inner-hero-media img { max-height: 320px; }
.content-section { border-top: 1px solid rgba(201,0,0,.08); padding-top: 30px; }
.content-section.soft-panel { border-top: 0; }
.prose-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.prose-grid p { font-size: 16px; }
.steps-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.step-card { padding: 20px; }
.step-card > span { color: rgba(201,0,0,.28); font-weight: 850; font-size: 30px; line-height: 1; }
.step-card h3 { margin-top: 14px; }
.step-card p { margin-bottom: 0; font-size: 14px; }
.related-panel { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 26px 28px; border: 1px solid var(--line); border-radius: 20px; }
.related-panel h2 { margin-bottom: 0; }
.related-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
.related-links a { padding: 9px 14px; border-radius: 999px; background: var(--red-soft); color: var(--red); font-weight: 700; }
.responsible-strip { background: var(--footer); color: #fff; border-radius: 22px; padding: 28px; }
.responsible-strip h2 { color: #fff; font-size: 26px; }
.responsible-strip p { color: #CDD4DF; max-width: 900px; }
.responsible-strip a { color: #fff; border-bottom: 1px solid rgba(255,255,255,.5); font-weight: 700; }
.site-footer { background: var(--footer); color: #E7ECF3; margin-top: 54px; }
.footer-grid { width: min(1240px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 34px; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 34px; }
.footer-brand img { max-width: 150px; max-height: 48px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { color: #B7C0CD; max-width: 520px; margin-top: 18px; }
.site-footer h2 { color: #fff; font-size: 16px; }
.site-footer a { display: block; color: #C8D0DB; margin: 8px 0; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); }
.footer-bottom p { width: min(1240px, calc(100% - 32px)); margin: 0 auto; padding: 18px 0; color: #98A4B3; font-size: 13px; }
.mobile-drawer { position: fixed; z-index: 1200; inset: 0 auto 0 0; width: min(84vw, 320px); background: #fff; transform: translateX(-105%); transition: transform .25s ease; box-shadow: 18px 0 50px rgba(0,0,0,.18); overflow-y: auto; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-overlay { position: fixed; z-index: 1100; inset: 0; background: rgba(17,21,28,.48); opacity: 0; visibility: hidden; transition: .25s ease; }
.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-head { min-height: 72px; display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid #ECEFF3; }
.drawer-logo img { max-width: 145px; max-height: 46px; object-fit: contain; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 50%; background: var(--soft); color: var(--text); font-size: 28px; line-height: 1; }
.mobile-drawer nav { padding: 12px; display: grid; gap: 4px; }
.mobile-drawer nav a { padding: 11px 12px; border-radius: 10px; }
.mobile-drawer nav a.active, .mobile-drawer nav a:hover { color: var(--red); background: var(--red-soft); }
.mobile-bottom-nav { display: none; }
@media (max-width: 1180px) {
    .page-frame { grid-template-columns: 166px minmax(0,1fr); gap: 20px; }
    .header-inner { grid-template-columns: 160px minmax(0,1fr) auto; gap: 14px; }
    .nav-core a { padding: 9px 12px; }
    .product-overview-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .service-summary { grid-template-columns: repeat(2,1fr); }
    .service-summary article:nth-child(2) { border-right: 0; }
    .service-summary article:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.18); }
}
@media (max-width: 980px) {
    .page-frame { width: min(100% - 28px, 920px); grid-template-columns: 1fr; }
    .side-category { display: none; }
    .header-inner { width: min(100% - 28px, 920px); }
    .product-overview-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .steps-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
    .footer-grid > div:last-child { grid-column: 2 / 4; }
}
@media (max-width: 860px) {
    :root { --header-h: 64px; }
    body { padding-bottom: 66px; }
    .header-inner { display: grid; grid-template-columns: 44px 1fr auto; gap: 10px; }
    .menu-toggle { display: block; }
    .nav-core { display: none; }
    .logo { justify-self: center; }
    .logo img { max-width: 132px; max-height: 44px; }
    .header-register { min-height: 38px; padding: 8px 16px; }
    .mobile-bottom-nav { display: grid; position: fixed; z-index: 900; inset: auto 0 0; grid-template-columns: repeat(4,1fr); background: rgba(255,255,255,.98); border-top: 1px solid #E5E8ED; padding-bottom: env(safe-area-inset-bottom); box-shadow: 0 -8px 24px rgba(18,28,45,.08); }
    .mobile-bottom-nav a { min-height: 58px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1px; color: #68717E; font-size: 12px; }
    .mobile-bottom-nav a span { font-size: 19px; line-height: 1; }
    .mobile-bottom-nav a.active { color: var(--red); }
    .home-intro, .inner-hero, .feature-split { grid-template-columns: 1fr; }
    .home-intro-media, .inner-hero-media { order: -1; min-height: 190px; }
    .feature-split.reverse figure { order: 0; }
    .quick-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .feature-grid, .triple-zone { grid-template-columns: 1fr; }
    .two-column { grid-template-columns: 1fr; }
    .about-summary { grid-template-columns: 1fr; }
    .related-panel { align-items: flex-start; flex-direction: column; }
    .related-links { justify-content: flex-start; }
    .footer-grid { grid-template-columns: repeat(2,1fr); }
    .footer-brand { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: auto; }
}
@media (max-width: 620px) {
    body { font-size: 15px; }
    .page-frame { width: min(100% - 20px, 600px); }
    .section-space { margin: 24px 0; }
    .soft-panel { border-radius: 18px; padding: 20px 16px; }
    .banner-slider { margin-top: 14px; min-height: 150px; height: clamp(150px, 48vw, 210px); border-radius: 16px; }
    .slider-arrow { width: 36px; height: 36px; font-size: 24px; }
    .home-intro-media, .inner-hero-media, .feature-split figure { min-height: 170px; border-radius: 16px; }
    .home-intro-media img, .inner-hero-media img, .feature-split img { max-height: 220px; }
    .service-summary { grid-template-columns: 1fr; padding: 8px; border-radius: 18px; }
    .service-summary article, .service-summary article:nth-child(2) { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.16); }
    .service-summary article:last-child { border-bottom: 0; }
    .quick-grid, .product-overview-grid, .review-grid, .prose-grid, .steps-grid { grid-template-columns: 1fr; }
    .zone-card { display: grid; grid-template-columns: 120px 1fr; align-items: center; }
    .zone-card img { height: 116px; }
    .product-card img { height: 145px; }
    .triple-zone img { height: 160px; }
    .notice-card { grid-template-columns: 120px 1fr; }
    .notice-card div, .security-card div { padding: 18px; }
    .security-card { grid-template-columns: 84px 1fr; padding-left: 12px; }
    .security-icon { width: 58px; height: 58px; font-size: 28px; }
    .inner-hero { min-height: auto; }
    .related-panel { padding: 20px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px 16px; padding-top: 36px; }
    .footer-brand { grid-column: 1 / -1; }
    .hero-actions, .inline-links { gap: 12px; }
}
@media (max-width: 390px) {
    .header-inner { width: calc(100% - 18px); }
    .logo img { max-width: 112px; }
    .header-register { padding-inline: 13px; }
    .zone-card { grid-template-columns: 100px 1fr; }
    .notice-card, .security-card { grid-template-columns: 1fr; padding-left: 0; }
    .security-icon { margin: 18px 0 0 18px; }
}