:root {
  --bg:#ffffff; --soft:#f6f6f7; --text:#111111; --body:#333333; --muted:#676767;
  --line:#e4e4e7; --brand:#e31b23; --dark:#0d0d0f; --shadow:0 18px 38px rgba(17,17,17,.08); --radius:22px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--body);font:16px/1.75 "Microsoft YaHei","PingFang SC",sans-serif}
img{max-width:100%;height:auto;display:block} a{text-decoration:none;color:inherit}
.wrap{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:var(--dark)}
.nav-row{min-height:74px;display:flex;align-items:center;gap:20px}.brand img{height:34px;width:auto;object-fit:contain;filter:brightness(0) invert(1)}
.nav{margin-left:auto;display:flex;gap:22px;color:#fff}.nav a,.header-cta{font-size:14px}.header-cta{padding:10px 18px;border:1px solid rgba(255,255,255,.16);border-radius:999px;color:#fff}
.menu-toggle{display:none;margin-left:auto;border:0;background:transparent;padding:0}.menu-toggle span{display:block;width:24px;height:2px;margin:5px 0;background:#fff}
.hero{padding:42px 0;background:linear-gradient(180deg,#161619,#0d0d0f)} .hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
.eyebrow{margin:0;font-size:12px;font-weight:800;letter-spacing:.18em;color:var(--brand)}
.hero-copy h1,.section-head h2,.cta-box h2{margin:10px 0 16px;line-height:1.16}.hero-copy h1{font-size:clamp(34px,4.5vw,56px);color:#fff}.hero-copy p{color:#d2d3d9}
.hero-media{margin:0;background:#fff;border-radius:24px;overflow:hidden}.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center}
.section{padding:70px 0}.section-soft,.section-faq{background:var(--soft)}
.section-head{max-width:760px;margin-bottom:24px}.section-head p{margin:0;color:var(--muted)} .section-head h2{color:var(--text)}
.column-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.column-grid article,.docs-panels div,.faq-item,.cta-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.column-grid article{padding:24px;position:relative}.column-grid article::before{content:'';position:absolute;left:24px;top:0;width:44px;height:4px;background:var(--brand)}
.column-grid h3{margin:10px 0 8px;color:var(--text)} .column-grid p{margin:0;color:var(--muted)}
.docs-grid,.stagger-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}
.docs-panels{display:grid;gap:14px}.docs-panels div{padding:20px}.docs-panels strong{display:block;color:var(--text);margin-bottom:4px}.docs-panels span{color:var(--muted)}
.event-media{margin:0;border-radius:22px;overflow:hidden;background:#111}.event-media img{width:100%;height:100%;object-fit:cover;object-position:center}
.event-copy ul{margin:18px 0 0;padding-left:20px}
.faq-lines{display:grid;gap:12px}.faq-item{overflow:hidden}
.faq-question{width:100%;display:flex;justify-content:space-between;gap:18px;padding:18px 22px;border:0;background:transparent;color:var(--text);font:inherit;font-weight:700;text-align:left;cursor:pointer}
.faq-question b{color:var(--brand);font-size:24px}.faq-answer{display:none;padding:0 22px 18px;color:var(--muted)}.faq-item.open .faq-answer{display:block}
.dark-tags{display:flex;flex-wrap:wrap;gap:12px}.dark-tags span{padding:11px 16px;border-radius:999px;background:#151519;color:#fff}
.cta-section{padding:24px 0 72px}.cta-box{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:26px 28px;background:linear-gradient(90deg,#fff,#f5f5f7)}
.btn{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:0 22px;border-radius:999px;font-weight:700}.btn-primary{background:var(--brand);color:#fff}
@media (max-width:980px){
  .hero-grid,.column-grid,.docs-grid,.stagger-grid{grid-template-columns:1fr}
  .nav{display:none;width:100%;order:4;flex-direction:column;padding-bottom:16px}.nav.open{display:flex}
  .menu-toggle{display:block}.header-cta{display:none}.nav-row{flex-wrap:wrap}.cta-box{flex-direction:column;align-items:flex-start}
}
@media (max-width:640px){.wrap{width:min(100% - 24px,1120px)}.section{padding:54px 0}.hero-copy h1{font-size:34px}}

.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;
}