:root {
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --paper: #f5f7fa;
  --card: #fff;
  --red: #c8102e;
  --red-deep: #9a0c23;
  --navy: #0f2744;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background-color: #0f2744;
}
body::before {
  content: "";
  position: fixed;
  left: 0; top: 0; right: 0; bottom: 0;
  z-index: -1;
  background-color: #0f2744;
  background-image: url("../assets/bg.jpg");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(1200px, calc(100% - 48px)); margin: 0 auto; }
.promo {
  background-color: #0f2744; color: #fff; font-size: 13px; padding: 8px 16px; text-align: center;
}
.top {
  position: sticky; top: 0; z-index: 40;
  background: #fff; border-bottom: 1px solid var(--line);
}
.top-inner { display: flex; align-items: center; justify-content: flex-start; height: 64px; gap: 40px; position: relative; }
.header-cta { flex-shrink: 0; margin-left: auto; }
.btn.header-bang {
  display: none; flex-shrink: 0;
  background: #0f2744; color: #fff;
}
.menu-btn {
  display: none; height: 36px; padding: 0 12px; border: 1px solid #c8102e;
  background: #fff; color: #c8102e; border-radius: 4px; font: inherit; cursor: pointer; z-index: 50;
}
.brand { display: flex; align-items: center; gap: 0; flex-shrink: 0; }
.logo-choice-head { height: 26px; width: auto; display: block; max-width: none; }
.logo-mark { height: 36px; width: auto; display: block; }
.logo { height: 44px; width: auto; display: block; }
.brand-cn { color: #111827; white-space: nowrap; font-weight: 700; font-size: 20px; letter-spacing: 0.02em; }
.mark {
  width: 36px; height: 36px; border-radius: 4px; background: var(--red); color: #fff;
  display: grid; place-items: center;
}
.nav { display: flex; align-items: center; gap: 24px; font-size: 15px; font-weight: 500; margin-left: 0; }
.nav > a, .drop > span { color: var(--ink); cursor: pointer; }
.drop { position: relative; padding: 24px 0; }
.mega {
  display: none; position: absolute; left: 50%; transform: translateX(-40%);
  top: 58px; width: 640px; background: #fff; border: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(15,23,42,.12); padding: 20px; grid-template-columns: 1fr 1fr; gap: 12px;
}
.drop:hover .mega { display: grid; }
.mega a { display: block; padding: 10px 12px; border-radius: 8px; }
.mega a:hover { background: #f8fafc; }
.mega b { display: block; }
.mega small { color: var(--muted); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--red); color: #fff; border: 0; border-radius: 4px;
  padding: 10px 18px; font: inherit; cursor: pointer;
}
.btn.ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.7); }
.btn.line { background: #fff; color: var(--red); border: 1px solid var(--red); }
.btn.nav-phone { display: none; }
.hero {
  position: relative; min-height: 680px; color: #fff; overflow: hidden;
  display: -webkit-box; display: flex; -webkit-box-align: center; align-items: center;
  background-color: transparent;
}
.hero-photo { display: none; }
.hero::after {
  content: ""; position: absolute; left: 0; top: 0; right: 0; bottom: 0;
  background-color: rgba(15,39,68,.28); z-index: 0;
}
.hero-mark {
  position: absolute; right: 5%; top: 16%;
  width: min(460px, 40%); height: auto;
  opacity: 0.28; z-index: 1; pointer-events: none;
  filter: brightness(1.7);
}
.hero .wrap { position: relative; z-index: 2; padding: 96px 0 120px; }
.hero .kicker { color: #fecaca; margin: 0 0 14px; letter-spacing: .12em; font-size: 13px; }
.hero h1 { margin: 0 0 18px; font-size: 56px; line-height: 1.12; font-weight: 700; max-width: 640px; }
.hero p { margin: 0 0 32px; max-width: 560px; font-size: 18px; color: #e5e7eb; line-height: 1.7; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.ask-sec { background: transparent; margin-top: -72px; position: relative; z-index: 2; padding-bottom: 8px; }
.ask {
  background: #fff; border-radius: 8px; box-shadow: 0 10px 30px rgba(15,23,42,.08);
  padding: 22px 24px; border: 1px solid var(--line);
}
.ask h2 { margin: 0 0 6px; font-size: 22px; }
.ask .sub { color: var(--muted); margin: 0 0 14px; }
.ask-row { display: flex; gap: 8px; }
.ask input {
  flex: 1; height: 48px; border: 1px solid var(--line); border-radius: 4px; padding: 0 14px; font: inherit;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chips button {
  border: 1px solid var(--line); background: #f8fafc; border-radius: 999px; padding: 6px 12px; font: inherit; cursor: pointer;
}
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding: 48px 0; }
.stat { padding: 8px 24px; border-right: 1px solid rgba(255,255,255,.18); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-size: 36px; color: #ff6b81; line-height: 1.1; }
.stat span { color: #e5e7eb; font-size: 14px; }
.sec { padding: 64px 0; background-color: transparent; }
.sec.alt { background-color: transparent; }
.sec h2 { margin: 0 0 8px; font-size: 32px; text-align: center; color: #fff; }
.sec .lead { text-align: center; color: #d1d5db; margin: 0 auto 36px; max-width: 640px; }
.products { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.pcard {
  background: #fff; border: 1px solid var(--line); overflow: hidden;
  display: grid; grid-template-columns: 260px 1fr;
  min-height: 300px;
}
.pcard img { width: 260px; height: 100%; object-fit: cover; min-height: 300px; }
.pcard .body { padding: 28px 24px; }
.eyebrow { color: var(--red); font-size: 13px; margin: 0 0 6px; }
.pcard h3 { margin: 0 0 10px; font-size: 22px; }
.pcard ul { margin: 0 0 14px; padding-left: 18px; color: #374151; line-height: 1.8; }
.badge { display: inline-block; background: #fff7ed; color: #9a3412; font-size: 12px; padding: 3px 8px; border-radius: 4px; margin-bottom: 12px; }
.pcard .row { display: flex; gap: 10px; }
.scenes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.sc {
  background: #fff; border: 1px solid var(--line); overflow: hidden;
}
.sc img { height: 210px; width: 100%; object-fit: cover; }
.sc .body { padding: 16px; }
.sc h3 { margin: 0 0 8px; font-size: 18px; }
.sc p { margin: 0 0 12px; color: var(--muted); font-size: 14px; min-height: 40px; }
.loops { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.loop { background: #fff; border: 1px solid var(--line); padding: 24px; }
.loop .n { color: var(--red); font-weight: 700; font-size: 28px; }
.cta {
  background-color: rgba(15,39,68,.45); color: #fff; padding: 56px 0; text-align: center;
}
.cta h2 { margin: 0 0 10px; font-size: 32px; }
.cta p { margin: 0 0 22px; color: #cbd5e1; }
.float {
  position: fixed; right: 16px; top: 42%; z-index: 30; display: flex; flex-direction: column; gap: 8px;
}
.float a, .float button {
  width: 52px; background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 8px 4px; text-align: center; font-size: 11px; cursor: pointer; box-shadow: 0 6px 16px rgba(0,0,0,.08);
}
.wxbox {
  display: none; position: absolute; right: 60px; top: 0; background: #fff; border: 1px solid var(--line);
  padding: 10px; width: 160px; text-align: center; font-size: 12px;
}
.float .wx { position: relative; }
.float .wx:hover .wxbox { display: block; }
.foot { background: #0b1220; color: #94a3b8; padding: 40px 0 24px; font-size: 13px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.foot h4 { color: #fff; margin: 0 0 10px; }
.foot .logo { height: 64px; width: auto; margin-bottom: 14px; background: transparent; padding: 0; border-radius: 0; max-width: none; display: block; }
.foot .logo-choice { height: 22px; width: auto; display: block; margin: 8px 0 12px; background: #fff; padding: 8px 10px; border-radius: 4px; }
.foot .logo-mark { height: 28px; margin-bottom: 8px; filter: brightness(2); }
.foot a { display: block; margin: 6px 0; color: #94a3b8; }
.copy { border-top: 1px solid #1f2937; padding-top: 16px; }
.nav .on { color: var(--red); font-weight: 700; }
body.bang-page { background: #fff; }
body.bang-page::before { display: none; }
.bang-bar {
  background-color: #0f2744; color: #fff; font-size: 13px;
  padding: 8px 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.bang-bar a { color: #fecaca; }
.bang-stage { height: calc(100vh - 64px - 36px); background: #0f172a; }
.bang-stage-full { height: calc(100vh - 64px); }
.bang-stage iframe { width: 100%; height: 100%; border: 0; display: block; background: #fff; }
@media (max-width: 900px) {
  .top .wrap { width: calc(100% - 24px); }
  .brand { gap: 8px; }
  .logo-mark { display: none; }
  .logo { height: 32px; }
  .logo-choice-head { height: 22px; }
  .brand-cn { font-size: 16px; }
  .hero-mark { width: 58%; top: 12%; opacity: 0.2; }
  .menu-btn {
    display: inline-flex !important; align-items: center; margin-left: auto;
    background: #c8102e; color: #fff; border-color: #c8102e;
  }
  .header-cta { display: none; }
  .btn.header-bang { display: inline-flex; margin-left: auto; }
  .btn.nav-phone { display: inline-flex; }
  .nav {
    display: none; margin-left: 0; position: absolute; left: 0; right: 0; top: 64px;
    background: #fff; border-bottom: 1px solid var(--line);
    -webkit-box-orient: vertical; -webkit-box-direction: normal;
    flex-direction: column; align-items: stretch;
    padding: 12px 20px 16px; gap: 12px;
  }
  .nav.open { display: -webkit-box; display: flex; }
  .drop { padding: 8px 0; }
  .mega {
    position: static; transform: none; width: auto; display: grid;
    box-shadow: none; border: 0; padding: 8px 0 0;
  }
  .float { display: none; }
  .pcard, .products, .scenes, .loops, .stats, .foot-grid { grid-template-columns: 1fr; }
  .pcard img { width: 100%; height: 180px; min-height: 180px; }
  .stat { border-right: 0; border-bottom: 1px solid var(--line); padding: 16px 0; }
  .hero { min-height: 520px; background-color: transparent; color: #fff; }
  .hero h1 { font-size: 32px; color: #fff; }
  .hero p, .hero .kicker { color: #fecaca; }
  .hero p { color: #e5e7eb; }
  .hero .wrap { padding: 64px 0 96px; }
}