:root {
  --bg: #fbfbfd;
  --bg-soft: #f0f0f4;
  --text: #16161a;
  --text-soft: #6b6b76;
  --accent: #cc0000;
  --accent-2: #7c3aed;
  --card-bg: rgba(255,255,255,.72);
  --card-border: rgba(0,0,0,.08);
  --shadow: 0 8px 30px rgba(20,20,40,.08);
  --glow-a: rgba(204,0,0,.22);
  --glow-b: rgba(124,58,237,.20);
}

[data-theme="dark"] {
  --bg: #07070b;
  --bg-soft: #111118;
  --text: #f3f3f7;
  --text-soft: #9a9aa8;
  --accent: #ff4d4d;
  --accent-2: #a78bfa;
  --card-bg: rgba(22,22,30,.66);
  --card-border: rgba(255,255,255,.10);
  --shadow: 0 12px 40px rgba(0,0,0,.5);
  --glow-a: rgba(255,77,77,.26);
  --glow-b: rgba(167,139,250,.24);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background .4s ease, color .4s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* 背景光晕 */
.aurora {
  position: fixed;
  inset: -20% -10% auto -10%;
  height: 70vh;
  background:
    radial-gradient(40% 50% at 25% 30%, var(--glow-a), transparent 70%),
    radial-gradient(45% 55% at 78% 20%, var(--glow-b), transparent 70%);
  filter: blur(20px);
  opacity: .9;
  z-index: 0;
  pointer-events: none;
}
/* 细网格纹理，制造大厂纵深感 */
.grid-tex {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--text) 5%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--text) 5%, transparent) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
  opacity: .5;
  z-index: 0;
  pointer-events: none;
}

/* 顶栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--card-border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 19px; color: var(--text); text-decoration: none; letter-spacing: -.3px; }
.brand-mark { color: var(--accent); font-size: 16px; }
.topnav { display: flex; gap: 26px; }
.topnav a { color: var(--text-soft); text-decoration: none; font-size: 15px; transition: color .2s; }
.topnav a:hover { color: var(--accent); }
.controls { display: flex; gap: 12px; align-items: center; }
.lang-select select {
  background: var(--card-bg); color: var(--text);
  border: 1px solid var(--card-border); border-radius: 8px;
  padding: 5px 10px; font-size: 14px; backdrop-filter: blur(8px);
}
.theme-select { display: flex; gap: 4px; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 8px; padding: 3px; backdrop-filter: blur(8px); }
.theme-select button {
  background: transparent; border: none; border-radius: 6px;
  padding: 4px 8px; cursor: pointer; font-size: 14px; color: var(--text-soft); transition: all .2s;
}
.theme-select button.active { background: var(--accent); color: #fff; }

main { position: relative; z-index: 1; flex: 1; width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* HERO */
.hero { text-align: center; padding: 90px 0 50px; }
.hero-eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 26px;
}
.hero-title {
  font-size: clamp(40px, 7vw, 76px); font-weight: 850; letter-spacing: -2px; line-height: 1.02;
  background: linear-gradient(120deg, var(--text), var(--accent) 120%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub { color: var(--text-soft); margin-top: 20px; font-size: clamp(16px, 2.4vw, 20px); }
.hero-cta { display: flex; gap: 14px; justify-content: center; margin-top: 36px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 30px; border-radius: 10px; text-decoration: none; font-weight: 650; font-size: 16px; transition: transform .2s, box-shadow .2s, background .2s; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 24px var(--glow-a); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px var(--glow-a); }
.btn-ghost { background: var(--card-bg); color: var(--text); border: 1px solid var(--card-border); backdrop-filter: blur(8px); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.hero-meta { margin-top: 30px; font-size: 13px; color: var(--text-soft); letter-spacing: .5px; }

/* 指标条 */
.metrics {
  display: flex; align-items: center; justify-content: center; gap: 0;
  margin: 10px 0 70px; padding: 22px 0;
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px;
  box-shadow: var(--shadow); backdrop-filter: blur(14px);
}
.metric { flex: 1; text-align: center; }
.metric-num {
  display: block; font-size: clamp(26px, 4vw, 36px); font-weight: 800; letter-spacing: -1px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.metric-label { font-size: 13px; color: var(--text-soft); margin-top: 6px; display: block; }
.metric-sep { width: 1px; height: 40px; background: var(--card-border); }

/* 旗舰焦点 */
.flagship { margin: 30px 0 80px; }
.flagship-inner {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center;
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 24px;
  padding: 48px; box-shadow: var(--shadow); backdrop-filter: blur(16px);
  position: relative; overflow: hidden;
}
.flagship-inner::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(60% 80% at 100% 0%, var(--glow-b), transparent 60%);
  pointer-events: none;
}
.badge-flagship {
  display: inline-block; background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 999px; letter-spacing: 1px; margin-bottom: 16px;
}
.flagship-copy h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; letter-spacing: -.5px; }
.flagship-copy p { color: var(--text-soft); margin-top: 14px; font-size: 16px; line-height: 1.7; }
.flagship-points { list-style: none; margin: 22px 0 28px; display: flex; flex-direction: column; gap: 10px; }
.flagship-points li { color: var(--text); font-size: 15px; padding-left: 24px; position: relative; }
.flagship-points li::before { content: "◆"; position: absolute; left: 0; color: var(--accent); font-size: 12px; top: 3px; }

/* 轨道可视化 */
.flagship-visual { display: flex; align-items: center; justify-content: center; }
.orbit { position: relative; width: 240px; height: 240px; }
.orbit-core {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 88px; height: 88px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; font-weight: 800; font-size: 22px;
  box-shadow: 0 0 40px var(--glow-a);
}
.orbit-node {
  position: absolute; width: 56px; height: 56px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700;
  background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text); backdrop-filter: blur(8px);
}
.orbit-node.n1 { top: 0; left: 50%; transform: translateX(-50%); }
.orbit-node.n2 { bottom: 12%; left: 6%; }
.orbit-node.n3 { bottom: 12%; right: 6%; }

/* 产品矩阵 */
.products { margin-bottom: 80px; }
.section-title { text-align: center; font-size: clamp(24px, 4vw, 34px); font-weight: 800; letter-spacing: -.5px; margin-bottom: 14px; }
.section-sub { text-align: center; color: var(--text-soft); font-size: 16px; margin-bottom: 40px; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product-card {
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 18px;
  padding: 30px 26px; box-shadow: var(--shadow); backdrop-filter: blur(14px);
  transition: transform .25s ease, border-color .25s ease; position: relative; overflow: hidden;
}
.product-card:hover { transform: translateY(-6px); border-color: var(--accent); }
.product-no {
  font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  display: inline-block; padding: 3px 10px; border-radius: 999px; margin-bottom: 16px;
}
.product-icon { font-size: 34px; margin-bottom: 16px; }
.product-card h4 { font-size: 20px; margin-bottom: 10px; }
.product-card > p { color: var(--text-soft); font-size: 14px; line-height: 1.65; }
.product-points { list-style: none; margin: 16px 0 18px; display: flex; flex-direction: column; gap: 8px; }
.product-points li { color: var(--text); font-size: 13px; padding-left: 20px; position: relative; line-height: 1.5; }
.product-points li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; font-size: 12px; top: 1px; }
.card-link { display: inline-block; color: var(--accent); text-decoration: none; font-weight: 650; }

/* 即将纳入态 */
.card-soon { opacity: .82; }
.card-soon .product-no { color: var(--text-soft); background: color-mix(in srgb, var(--text) 8%, transparent); }
.card-soon-tag {
  display: inline-block; margin-top: 4px; font-size: 12px; font-weight: 700; color: var(--text-soft);
  border: 1px dashed var(--card-border); padding: 4px 12px; border-radius: 999px;
}

/* 生态图谱 */
.ecosystem { margin-bottom: 90px; text-align: center; }
.eco-sub { color: var(--text-soft); max-width: 640px; margin: 0 auto 40px; font-size: 16px; line-height: 1.7; }
.eco-graph { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; align-items: center; }
.eco-node {
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 14px;
  padding: 20px 28px; font-weight: 700; font-size: 17px; box-shadow: var(--shadow); backdrop-filter: blur(10px);
}
.eco-hub {
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none;
  font-size: 19px; box-shadow: 0 8px 30px var(--glow-a);
}
.eco-hub small { display: block; font-weight: 500; font-size: 12px; opacity: .9; margin-top: 6px; }
.eco-dim { opacity: .5; }
.eco-note { margin-top: 32px; color: var(--text-soft); font-size: 14px; }

/* 页脚 */
.site-footer {
  position: relative; z-index: 1; text-align: center; padding: 40px 24px;
  border-top: 1px solid var(--card-border); color: var(--text-soft);
  background: color-mix(in srgb, var(--bg) 80%, transparent); backdrop-filter: blur(10px);
}
.footer-brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 17px; color: var(--text); margin-bottom: 10px; }
.footer-domains { font-size: 13px; letter-spacing: 1px; margin-bottom: 8px; }
.footer-copy { font-size: 13px; }

@media (max-width: 860px) {
  .flagship-inner { grid-template-columns: 1fr; padding: 32px; }
  .flagship-visual { order: -1; }
  .product-grid { grid-template-columns: 1fr; }
  .topnav { display: none; }
}
@media (max-width: 520px) {
  .topbar { padding: 12px 16px; }
  main { padding: 0 16px; }
  .hero { padding: 60px 0 40px; }
  .metrics { flex-direction: column; gap: 18px; }
  .metric-sep { width: 60%; height: 1px; }
}