/* ============================================================
   IDCore · 朗星泰 — Pioneer 风格设计系统（二版）
   白底 + 黑字 + 主红 #b91440（先锋官网实际 UI 色）+ 灰阶，深色仅页脚
   （参考 pioneercarentertainment.com 主题 CSS；无金色）
   ============================================================ */
:root {
  --bg: #ffffff;
  --bg-alt: #f5f6f7;
  --card: #ffffff;
  --border: rgba(17, 17, 17, .1);
  --text: #111111;
  --text-dim: #5a6577;
  --accent1: #b91440;
  --accent2: #9e1136;
  --accent3: #e54874;
  --grad: linear-gradient(135deg, #8f0f30 0%, #b91440 55%, #d61f52 110%);
  --shadow: rgba(0, 0, 0, .06);
  --shadow-strong: rgba(0, 0, 0, .12);
  --radius: 16px;
  --maxw: 1160px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { height: 28px; width: auto; object-fit: contain; display: block; }
.brand-name { font-size: 20px; font-weight: 700; letter-spacing: .5px; color: var(--text); }
.brand-name em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 24px; margin-left: 12px; }
.nav-links a { color: var(--text-dim); font-size: 14px; padding: 4px 0; line-height: 1.6; transition: color .2s; position: relative; }
.nav-links a:hover { color: var(--text); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
  background: var(--grad); border-radius: 2px; transform: scaleX(0); transition: transform .25s;
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.lang-btn {
  background: var(--card); color: var(--text); border: 1px solid var(--border);
  padding: 8px 16px; border-radius: 999px; cursor: pointer; font-size: 14px;
  transition: all .2s; font-family: inherit;
}
.lang-btn:hover { border-color: var(--accent1); color: var(--accent1); }
.menu-btn { display: none; background: none; border: none; color: var(--text); font-size: 22px; cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh; display: flex; align-items: center; position: relative;
  padding: 120px 24px 60px; overflow: hidden;
}
.hero-glow {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 400px at 20% 30%, rgba(185, 20, 64, .07), transparent 70%),
    radial-gradient(700px 500px at 80% 65%, rgba(185, 20, 64, .05), transparent 70%),
    radial-gradient(500px 400px at 60% 15%, rgba(255, 107, 129, .05), transparent 70%);
}
.hero-inner { max-width: var(--maxw); margin: 0 auto; position: relative; z-index: 1; }
.hero-tag {
  color: var(--accent1); font-size: 14px; letter-spacing: 4px; margin-bottom: 24px;
  font-weight: 600;
}
.hero-title { font-size: clamp(40px, 6vw, 68px); font-weight: 800; line-height: 1.15; letter-spacing: 1px; color: var(--text); }
.hero-title span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { max-width: 640px; color: var(--text-dim); font-size: 18px; margin: 24px 0 40px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 32px; border-radius: 999px; font-size: 16px;
  font-weight: 600; cursor: pointer; transition: all .25s; border: 1px solid transparent;
  font-family: inherit;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(185, 20, 64, .3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(185, 20, 64, .42); }
.btn-ghost { border-color: rgba(185, 20, 64, .4); color: var(--accent1); background: #fff; }
.btn-ghost:hover { border-color: var(--accent1); background: #fff5f6; }
.hero-metrics {
  display: flex; gap: 48px; margin-top: 64px; flex-wrap: wrap;
  padding-top: 32px; border-top: 1px solid var(--border);
}
.metric strong { display: block; font-size: 28px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.metric span { color: var(--text-dim); font-size: 14px; }

/* ---------- Section 通用 ---------- */
.section { padding: 100px 24px; max-width: var(--maxw); margin: 0 auto; }
.section-alt { max-width: none; background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-alt > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag { color: var(--accent1); font-size: 12px; letter-spacing: 4px; font-weight: 600; margin-bottom: 12px; }
.section-title { font-size: clamp(28px, 4vw, 40px); font-weight: 800; margin-bottom: 16px; color: var(--text); }
.section-desc { color: var(--text-dim); max-width: 560px; margin: 0 auto; font-size: 16px; }

/* ---------- 产品卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 24px; transition: all .3s; position: relative; overflow: hidden;
  box-shadow: 0 2px 12px var(--shadow);
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--grad); transform: scaleX(0); transition: transform .35s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 14px 34px var(--shadow-strong); border-color: rgba(185, 20, 64, .35); }
.card:hover::before { transform: scaleX(1); }
.card-icon { font-size: 34px; margin-bottom: 16px; }
.card h3 { font-size: 18px; margin-bottom: 12px; color: var(--text); }
.card p { color: var(--text-dim); font-size: 14px; }
.card-tag {
  display: inline-block; margin-top: 16px; font-size: 12px; color: var(--accent1);
  border: 1px solid rgba(185, 20, 64, .35); padding: 4px 12px; border-radius: 999px;
}

/* ---------- 装车效果（Gallery） ---------- */
.gallery-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.gallery-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 20px 24px; text-align: center; transition: all .3s;
  box-shadow: 0 2px 12px var(--shadow);
}
.gallery-card:hover { transform: translateY(-5px); box-shadow: 0 14px 32px var(--shadow-strong); border-color: rgba(185, 20, 64, .35); }
.gallery-card svg { width: 100%; height: auto; max-width: 340px; margin: 0 auto 14px; }
.gallery-card h3 { font-size: 18px; margin-bottom: 8px; color: var(--text); }
.gallery-card p { color: var(--text-dim); font-size: 14px; }

/* ---------- 车型品牌墙 ---------- */
.brand-wall {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 16px;
}
.brand {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 20px 16px; text-align: center; transition: all .3s; cursor: default;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  box-shadow: 0 2px 10px var(--shadow);
}
.brand:hover { transform: translateY(-4px); box-shadow: 0 10px 26px var(--shadow-strong); border-color: rgba(185, 20, 64, .35); }
.brand-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 50%; flex: none;
  background: var(--grad); color: #fff;
  font-size: 16px; font-weight: 700; letter-spacing: .5px;
  box-shadow: 0 4px 14px rgba(185, 20, 64, .25);
  user-select: none;
}
.brand > span:not(.brand-badge) { font-size: 14px; font-weight: 600; color: var(--text); }
.brand-more {
  border-style: dashed; border-color: rgba(185, 20, 64, .4);
  background: transparent; box-shadow: none;
  display: flex; align-items: center; justify-content: center;
}
.brand-more .brand-badge {
  background: transparent; border: 2px dashed var(--accent1);
  color: var(--accent1); font-size: 18px; box-shadow: none;
}
.brand-more > span:not(.brand-badge) { color: var(--accent1); font-size: 14px; }

/* ---------- 核心优势 ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.tech-item {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 28px; transition: all .3s; box-shadow: 0 2px 12px var(--shadow);
}
.tech-item:hover { box-shadow: 0 14px 30px var(--shadow-strong); border-color: rgba(185, 20, 64, .35); }
.tech-num { font-size: 28px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; opacity: .9; margin-bottom: 14px; }
.tech-item h3 { font-size: 18px; margin-bottom: 8px; color: var(--text); }
.tech-item p { color: var(--text-dim); font-size: 14px; }

/* ---------- 应用场景 ---------- */
.scene-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; }
.scene {
  text-align: center; padding: 24px 16px; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius); transition: all .3s;
  box-shadow: 0 2px 10px var(--shadow);
}
.scene:hover { transform: translateY(-4px); box-shadow: 0 10px 24px var(--shadow-strong); }
.scene span { font-size: 28px; display: block; margin-bottom: 12px; }
.scene h3 { font-size: 16px; color: var(--text-dim); font-weight: 500; }

/* ---------- 关于 ---------- */
.about-wrap { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.about-text .section-head { text-align: left; margin-bottom: 20px; }
.about-text .section-desc { margin: 0 0 16px; text-align: left; }
.about-stats { display: grid; gap: 16px; }
.stat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 24px; display: flex; align-items: baseline; gap: 16px;
  box-shadow: 0 2px 10px var(--shadow);
}
.stat strong { font-size: 28px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--text-dim); font-size: 14px; }

/* ---------- 品牌展示（关于区）：lecsource + 智行魔方（白底保证 logo 可见） ---------- */
.brand-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 8px; }
.brand-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 16px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; min-height: 130px; transition: box-shadow .3s;
}
.brand-card:hover { box-shadow: 0 12px 28px var(--shadow-strong); }
.brand-card img { max-width: 100%; max-height: 84px; object-fit: contain; }
.brand-card-zhixing img { max-height: 98px; }
.brand-card-tag {
  font-size: 11px; color: var(--text-dim); letter-spacing: 2px;
  border: 1px solid var(--border); padding: 2px 12px; border-radius: 999px;
}

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.contact-item {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 24px; text-align: center; transition: all .3s;
  box-shadow: 0 2px 10px var(--shadow);
}
.contact-item:hover { box-shadow: 0 12px 28px var(--shadow-strong); border-color: rgba(185, 20, 64, .35); }
.ci-icon { font-size: 28px; display: block; margin-bottom: 12px; }
.contact-item h3 { font-size: 16px; margin-bottom: 8px; color: var(--text); }
.contact-item a { color: var(--accent1); font-size: 14px; word-break: break-all; display: inline-block; padding: 4px 0; }
.contact-item a:hover { text-decoration: underline; }
.contact-item p { color: var(--text-dim); font-size: 14px; }

/* ---------- 页脚（黑色对比区，logo 放白底小卡保证可见） ---------- */
.footer { background: #111111; padding: 36px 24px; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-logo {
  background: #fff; border-radius: 8px; padding: 6px 10px; height: 34px;
}
.footer-brand .brand-name { color: #ffffff; }
.footer-copy { color: rgba(255, 255, 255, .62); font-size: 14px; }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s, transform .7s; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .nav-links {
    position: fixed; top: 58px; left: 0; right: 0; background: rgba(255, 255, 255, .97);
    flex-direction: column; padding: 16px 24px; gap: 16px;
    transform: translateY(-120%); transition: transform .3s; border-bottom: 1px solid var(--border);
  }
  .nav-links.open { transform: none; }
  .menu-btn { display: block; }
  .about-wrap { grid-template-columns: 1fr; }
  .hero-metrics { gap: 28px; }
}