:root {
  --bg: #f7f7f9;
  --surface: #ffffff;
  --line: #e1e3e8;
  --text: #16181d;
  --muted: #656d7b;
  --primary: #111111;
  --accent: #e31b23;
  --soft: #f0f2f6;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: linear-gradient(180deg, #fff 0%, var(--bg) 100%); color: var(--text); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.cover-image { object-fit: cover; object-position: center; }
.contain-image { object-fit: contain; object-position: center; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading h2, .hero h1, .cta-inner h2 { margin: 0 0 14px; line-height: 1.14; }
.section-heading p, .hero p, .faq-answer p, .panel p { color: var(--muted); line-height: 1.8; }

.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand img { height: 34px; object-fit: contain; }
.nav { display: flex; gap: 22px; font-size: 14px; color: var(--muted); }
.menu-toggle { display: none; border: 1px solid var(--line); background: var(--surface); color: var(--primary); border-radius: 999px; padding: 10px 16px; }

.hero, .brand-cards, .device-entry, .path-section, .gallery-section, .faq-section, .related-searches, .cta-band { padding: 72px 0; }
.hero-grid, .split-grid, .cta-inner { display: grid; gap: 28px; align-items: center; }
.hero-grid { grid-template-columns: 1fr 0.92fr; }
.hero-media img { width: 100%; min-height: 360px; border-radius: 28px; border: 1px solid var(--line); box-shadow: 0 24px 54px rgba(17,17,17,.08); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; border-radius: 999px; font-weight: 700; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { border: 1px solid var(--line); background: var(--surface); color: var(--primary); }

.card-grid, .gallery-grid, .path-grid { display: grid; gap: 18px; }
.card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.image-card, .panel, .gallery-grid article, .faq-item { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; }
.image-card { overflow: hidden; }
.image-card img { width: 100%; height: 220px; padding: 18px; background: var(--soft); }
.image-card div { padding: 20px; }

.split-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
.panel { padding: 28px; }
.dark-panel { background: linear-gradient(135deg, #111111, #252a35); color: #fff; }
.dark-panel p { color: rgba(255,255,255,.78); }

.path-grid { grid-template-columns: repeat(4, minmax(0,1fr)); }
.path-grid article { background: linear-gradient(180deg, #fff 0%, #f6f7fb 100%); border: 1px solid var(--line); border-radius: 22px; padding: 24px; }
.path-grid span { display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center; border-radius: 50%; background: #111; color: #fff; margin-bottom: 14px; font-weight: 700; }

.gallery-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.gallery-grid article { overflow: hidden; }
.gallery-grid img { width: 100%; height: 180px; padding: 16px; background: #fafafb; }
.gallery-grid h3, .gallery-grid p { padding: 0 18px; }
.gallery-grid p { padding-bottom: 18px; color: var(--muted); line-height: 1.7; }

.faq-list { display: grid; gap: 16px; }
.faq-item { overflow: hidden; }
.faq-question { width: 100%; border: 0; background: transparent; text-align: left; font: inherit; font-weight: 700; padding: 20px 22px; cursor: pointer; }
.faq-answer { display: none; padding: 0 22px 20px; }
.faq-item.open .faq-answer { display: block; }

.tag-list { display: flex; flex-wrap: wrap; gap: 12px; }
.tag-list span { padding: 12px 16px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); font-weight: 600; }

.cta-band { padding-top: 0; }
.cta-inner { grid-template-columns: 1fr auto; background: linear-gradient(135deg, #121212, #2c313d); color: #fff; border-radius: 28px; padding: 34px; }

@media (max-width: 980px) {
  .menu-toggle { display: inline-flex; }
  .nav { position: absolute; top: calc(100% + 8px); right: 20px; left: 20px; display: none; flex-direction: column; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 18px; }
  .nav.open { display: flex; }
  .hero-grid, .card-grid, .split-grid, .path-grid, .gallery-grid, .cta-inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 24px, 1160px); }
  .hero, .brand-cards, .device-entry, .path-section, .gallery-section, .faq-section, .related-searches, .cta-band { padding: 56px 0; }
}

.site-logo,
.logo img,
.brand img,
.header-logo img,
.nav-logo img {
  display: block;
  width: auto !important;
  height: auto !important;
  max-height: 40px !important;
  max-width: 180px !important;
  object-fit: contain !important;
}

.brand,
.logo,
.header-logo,
.nav-logo {
  overflow: visible !important;
}

.site-header .brand,
header .brand,
header .logo,
header .header-logo,
header .nav-logo {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}