:root {
  --red: #C90000;
  --red-dark: #A80000;
  --red-light: rgba(201, 0, 0, 0.08);
  --red-border: rgba(201, 0, 0, 0.12);
  --text: #1F2329;
  --muted: #5D6673;
  --soft: #8A93A0;
  --line: #E7EAF0;
  --bg: #FFFFFF;
  --bg-soft: #F6F7F9;
  --bg-section: #F1F3F6;
  --footer: #11151C;
  --shadow: 0 12px 30px rgba(18, 28, 45, 0.08);
  --shadow-hover: 0 16px 38px rgba(18, 28, 45, 0.13);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --container: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

.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(calc(100% - 32px), var(--container));
  min-height: 74px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(150px, 1fr) auto minmax(150px, 1fr);
  align-items: center;
  gap: 24px;
}
.logo { justify-self: start; display: inline-flex; align-items: center; }
.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;
}
.nav-core a {
  color: var(--text);
  background: var(--bg-soft);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 15px;
  font-weight: 700;
  transition: .2s ease;
}
.nav-core a:hover, .nav-core a.active { color: var(--red); background: var(--red-light); }
.header-action { justify-self: end; }
.main-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  border-radius: 999px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(180deg, #F12B2B 0%, #C90000 55%, #A80000 100%);
  border: 0;
  box-shadow: 0 9px 20px rgba(201, 0, 0, 0.22);
  transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 12px 24px rgba(201, 0, 0, 0.3); }
.menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 10px; }
.menu-toggle span { display: block; height: 2px; margin: 4px 0; background: var(--text); border-radius: 5px; }

.site-shell {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
  padding-top: 98px;
  display: grid;
  grid-template-columns: 214px minmax(0, 1fr);
  gap: 26px;
}
.side-wrap { min-width: 0; }
.side-category {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 116px);
  overflow-y: auto;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--red-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  scrollbar-width: thin;
}
.side-category strong { display: block; padding: 7px 10px 10px; color: var(--red); font-size: 15px; }
.side-category a {
  display: block;
  color: var(--text);
  border-radius: 11px;
  padding: 8px 10px;
  margin: 2px 0;
  font-size: 14px;
  transition: .2s ease;
}
.side-category a:hover, .side-category a.active { color: var(--red); background: var(--red-light); font-weight: 700; }
.page-content { min-width: 0; padding-bottom: 44px; }

.banner-slider {
  width: 100%;
  height: clamp(260px, 29vw, 360px);
  margin: 0 auto 34px;
  border-radius: 22px;
  background: #F7F8FA;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.banner-track { position: relative; width: 100%; height: 100%; }
.banner-slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .45s ease; }
.banner-slide.active { opacity: 1; pointer-events: auto; }
.banner-slider 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: 0;
  border-radius: 50%;
  background: rgba(17, 21, 28, 0.58);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  z-index: 4;
}
.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; z-index: 4; }
.slider-dot { width: 9px; height: 9px; border: 0; border-radius: 50%; padding: 0; background: rgba(255,255,255,.64); box-shadow: 0 0 0 1px rgba(0,0,0,.08); }
.slider-dot.active { width: 24px; border-radius: 8px; background: var(--red); }

.section { margin: 0 0 34px; }
.section-panel {
  background: #fff;
  border: 1px solid var(--red-border);
  box-shadow: var(--shadow);
  border-radius: var(--radius-xl);
  padding: clamp(24px, 3.3vw, 42px);
}
.section-soft { background: var(--bg-soft); border-radius: var(--radius-xl); padding: clamp(24px, 3.3vw, 42px); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 22px; }
.section-kicker { margin: 0 0 5px; color: var(--red); font-size: 13px; font-weight: 900; letter-spacing: .12em; }
h1, h2, h3, .section-title { color: var(--red); line-height: 1.35; }
h1 { font-size: clamp(30px, 4vw, 46px); margin: 0 0 18px; }
h2, .section-title { font-size: clamp(24px, 3vw, 34px); margin: 0; }
h3 { font-size: 19px; margin: 0 0 10px; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: 17px; line-height: 1.9; color: #414954; }
.text-link { color: var(--red); font-weight: 800; }
.inline-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.outline-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 9px 20px; border-radius: 999px; border: 1px solid var(--red-border); color: var(--red); background: #fff; font-weight: 800; }

.hero-inner { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr); align-items: center; gap: 36px; }
.hero-visual { border-radius: var(--radius-lg); overflow: hidden; background: var(--bg-soft); border: 1px solid var(--line); }
.hero-visual img { width: 100%; height: 270px; object-fit: contain; }

.quick-grid, .card-grid, .review-grid, .faq-grid, .data-grid { display: grid; gap: 18px; }
.quick-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 26px; }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.data-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card, .zone-card, .info-card, .review-card, .faq-card {
  background: #fff;
  border: 1px solid var(--red-border);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover, .zone-card:hover, .info-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.card-body, .info-body, .review-card, .faq-card { padding: 20px; }
.card img, .zone-card img, .info-card img, .content-img { width: 100%; height: 200px; object-fit: contain; background: #F7F8FA; }
.product-card img { width: 100%; height: 165px; object-fit: contain; background: #F7F8FA; }
.card-tag { display: inline-flex; align-items: center; padding: 4px 9px; margin-bottom: 10px; border-radius: 999px; color: var(--red); background: var(--red-light); font-size: 12px; font-weight: 900; }
.quick-item { padding: 18px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius-md); }
.quick-item strong { color: var(--red); display: block; margin-bottom: 6px; }

.data-strip { background: linear-gradient(135deg, #C90000 0%, #A80000 100%); border-radius: var(--radius-xl); padding: 26px; box-shadow: 0 14px 30px rgba(201,0,0,.18); }
.data-item { padding: 18px; border: 1px solid rgba(255,255,255,.22); border-radius: var(--radius-md); background: rgba(255,255,255,.08); }
.data-item strong { display: block; color: #fff; font-size: 18px; margin-bottom: 8px; }
.data-item p { color: rgba(255,255,255,.82); margin: 0; font-size: 14px; }

.split-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .92fr); align-items: center; gap: 34px; }
.split-layout.reverse { grid-template-columns: minmax(280px, .92fr) minmax(0, 1fr); }
.split-layout.reverse .split-media { order: 1; }
.split-layout.reverse .split-copy { order: 2; }
.split-media { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #F7F8FA; }
.split-media img { width: 100%; height: 260px; object-fit: contain; }
.feature-list { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.feature-list li { position: relative; padding-left: 22px; color: var(--muted); }
.feature-list li::before { content: ""; position: absolute; left: 0; top: .75em; width: 8px; height: 8px; border-radius: 50%; background: var(--red); }

.horizontal-scroll { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(205px, 1fr); gap: 16px; overflow-x: auto; padding: 3px 3px 14px; scroll-snap-type: x proximity; }
.horizontal-scroll .product-card { scroll-snap-align: start; min-width: 0; }

.notice-box { border-left: 4px solid var(--red); padding: 18px 20px; border-radius: 0 14px 14px 0; background: var(--bg-soft); }
.notice-box p:last-child { margin-bottom: 0; }
.review-card blockquote { margin: 0 0 12px; color: #424A55; }
.review-card cite { color: var(--red); font-style: normal; font-weight: 800; }
.faq-card h3 { font-size: 17px; }
.faq-card p:last-child { margin-bottom: 0; }

.breadcrumbs { margin: 0 0 16px; color: var(--soft); font-size: 14px; }
.breadcrumbs a { color: var(--red); }
.inner-hero { margin-bottom: 30px; }
.inner-hero .section-panel { background: linear-gradient(135deg, #fff 0%, #F8F9FB 100%); }
.inner-intro { max-width: 790px; }

.site-footer { background: var(--footer); color: #E7ECF3; margin-top: 24px; }
.footer-inner { width: min(calc(100% - 32px), var(--container)); margin: 0 auto; padding: 46px 0 28px; display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 36px; }
.footer-brand img { max-height: 50px; width: auto; margin-bottom: 18px; }
.footer-brand p, .footer-col a, .footer-col p { color: #BCC5D1; font-size: 14px; }
.footer-col h3 { color: #fff; font-size: 17px; }
.footer-col a { display: block; margin: 8px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { width: min(calc(100% - 32px), var(--container)); margin: 0 auto; padding: 20px 0 28px; border-top: 1px solid rgba(255,255,255,.1); color: #9EA9B7; font-size: 13px; }
.footer-bottom p { color: #9EA9B7; margin: 4px 0; }

.drawer-overlay { position: fixed; inset: 0; z-index: 1100; background: rgba(17,21,28,.46); opacity: 0; visibility: hidden; transition: .25s ease; }
.mobile-drawer { position: fixed; top: 0; left: 0; z-index: 1200; width: 84vw; max-width: 320px; height: 100vh; padding: 18px; overflow-y: auto; background: #fff; transform: translateX(-102%); transition: transform .28s ease; box-shadow: 20px 0 44px rgba(17,21,28,.18); }
.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.drawer-head img { max-height: 46px; width: auto; }
.drawer-close { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 12px; background: #fff; font-size: 24px; color: var(--text); }
.drawer-nav { padding: 14px 0 20px; }
.drawer-nav a { display: block; padding: 10px 12px; border-radius: 10px; color: var(--text); }
.drawer-nav a:hover, .drawer-nav a.active { color: var(--red); background: var(--red-light); font-weight: 800; }
.mobile-bottom-nav { display: none; }

.registration-panel { max-width: 760px; margin: 0 auto; }
.registration-steps { counter-reset: step; display: grid; gap: 14px; margin-top: 22px; }
.registration-step { position: relative; padding: 18px 18px 18px 58px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius-md); }
.registration-step::before { counter-increment: step; content: counter(step); position: absolute; left: 18px; top: 18px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--red); color: #fff; font-weight: 900; }

@media (max-width: 1120px) {
  .site-shell { grid-template-columns: 1fr; }
  .side-wrap { display: none; }
  .quick-grid, .data-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card-grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .header-inner { grid-template-columns: 46px 1fr auto; min-height: 66px; gap: 12px; }
  .menu-toggle { display: block; }
  .logo { justify-self: center; }
  .logo img { max-height: 44px; }
  .nav-core { display: none; }
  .header-action .main-btn { min-height: 40px; padding: 8px 16px; }
  .site-shell { width: min(calc(100% - 24px), var(--container)); padding-top: 82px; }
  .hero-inner, .split-layout, .split-layout.reverse { grid-template-columns: 1fr; gap: 24px; }
  .split-layout.reverse .split-media, .split-layout.reverse .split-copy { order: initial; }
  .hero-visual img, .split-media img { height: 230px; }
  .card-grid.three { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  body { padding-bottom: 68px; }
  .header-inner { width: calc(100% - 20px); }
  .logo img { max-width: 132px; max-height: 40px; }
  .header-action .main-btn { padding: 7px 14px; font-size: 14px; }
  .site-shell { width: calc(100% - 20px); padding-top: 78px; }
  .page-content { padding-bottom: 20px; }
  .banner-slider { height: clamp(150px, 49vw, 210px); margin-bottom: 24px; border-radius: 16px; }
  .slider-arrow { width: 34px; height: 34px; font-size: 20px; }
  .slider-arrow.prev { left: 9px; }
  .slider-arrow.next { right: 9px; }
  .section { margin-bottom: 24px; }
  .section-panel, .section-soft { padding: 22px 18px; border-radius: 18px; }
  .section-head { align-items: flex-start; flex-direction: column; gap: 8px; }
  h1 { font-size: 30px; }
  h2, .section-title { font-size: 25px; }
  .quick-grid, .data-grid, .card-grid.four, .review-grid, .faq-grid { grid-template-columns: 1fr; }
  .card img, .zone-card img, .info-card img, .content-img, .product-card img { height: 150px; }
  .hero-visual img, .split-media img { height: 190px; }
  .data-strip { padding: 18px; border-radius: 18px; }
  .horizontal-scroll { grid-auto-columns: 78%; }
  .footer-inner { width: calc(100% - 24px); grid-template-columns: 1fr; gap: 22px; padding-top: 34px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { width: calc(100% - 24px); padding-bottom: 20px; }
  .mobile-bottom-nav {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 1050;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    min-height: 62px;
    background: rgba(255,255,255,.98);
    border-top: 1px solid var(--line);
    box-shadow: 0 -6px 18px rgba(18,28,45,.06);
  }
  .mobile-bottom-nav a { display: grid; place-items: center; padding: 9px 4px; color: var(--muted); font-size: 13px; font-weight: 800; }
  .mobile-bottom-nav a.active { color: var(--red); }
}