/* ========================================
   无序硬件 - 科技深色风格系统
   BG 出品，能少写绝不多写
   ======================================== */

/* --- CSS 变量 --- */
:root {
  --bg-primary: #0a0e27;
  --bg-secondary: #151932;
  --bg-card: #1a1f3a;
  --accent-blue: #00d4ff;
  --accent-purple: #a855f7;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --border-color: rgba(0, 212, 255, 0.15);
  --radius: 8px;
  --transition: 0.25s ease;
}

/* --- Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}
a {
  color: var(--accent-blue);
  text-decoration: none;
}
img {
  display: block;
  max-width: 100%;
}

/* --- 容器 --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- 通用 accent --- */
.accent {
  color: var(--accent-blue);
}

/* ========================================
   Header
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}
.logo-accent {
  color: var(--accent-blue);
}

.nav {
  display: flex;
  gap: 32px;
}
.nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}
.nav a:hover {
  color: var(--accent-blue);
}

/* ========================================
   Hero
   ======================================== */
.hero {
  min-height: 560px;
  display: flex;
  align-items: center;
  background: radial-gradient(
      ellipse 80% 60% at 50% 0%,
      rgba(0, 212, 255, 0.08) 0%,
      transparent 70%
    ),
    var(--bg-primary);
  padding: 80px 0;
}
.hero-content {
  max-width: 640px;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.hero-sub {
  font-size: 1rem;
  color: var(--accent-blue);
  letter-spacing: 0.2em;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.hero-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
  max-width: 520px;
}

/* --- 按钮 --- */
.btn-primary {
  display: inline-block;
  padding: 12px 32px;
  background: var(--accent-blue);
  color: #0a0e27;
  font-weight: 700;
  border-radius: var(--radius);
  transition: opacity var(--transition), box-shadow var(--transition);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
}
.btn-primary:hover {
  opacity: 0.88;
  box-shadow: 0 0 32px rgba(0, 212, 255, 0.55);
}

.btn-sm {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--accent-blue);
  color: var(--accent-blue);
  font-size: 0.8rem;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}
.btn-sm:hover {
  background: var(--accent-blue);
  color: #0a0e27;
}

/* ========================================
   产品区
   ======================================== */
.products-section {
  padding: 80px 0;
}
.alt-bg {
  background: var(--bg-secondary);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 8px;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: "";
  display: block;
  height: 3px;
  width: 48px;
  background: var(--accent-blue);
  margin-top: 8px;
  border-radius: 2px;
}
.section-sub {
  color: var(--text-secondary);
  margin-bottom: 40px;
  margin-top: 4px;
}

/* --- 产品网格 --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

/* --- 产品卡片 --- */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition),
    box-shadow var(--transition);
  position: relative;
}
.product-card:hover {
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.12);
}

/* 角标 */
.card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--accent-blue);
  color: #0a0e27;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  z-index: 1;
}
.accent-purple-badge {
  background: var(--accent-purple);
  color: #fff;
}

/* 图片区占位 */
.card-img-wrap {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-secondary);
}
.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.product-card:hover .card-img-wrap img {
  transform: scale(1.04);
}
.card-img-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-secondary), #0d1230);
}

/* 卡片内容 */
.card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.card-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  flex: 1;
  margin-bottom: 16px;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-price {
  color: var(--accent-blue);
  font-size: 1.1rem;
  font-weight: 700;
}

/* 特性标签 */
.spec-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
.spec-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.7rem;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--accent-blue);
  border-radius: 12px;
  font-weight: 600;
}

/* 参数列表 */
.specs-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  font-size: 0.8rem;
}
.specs-list li {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}
.specs-list li::before {
  content: "▸";
  color: var(--accent-blue);
  font-size: 0.9rem;
}

/* 占位符图标优化 */
.card-img-placeholder {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
  font-weight: 600;
  letter-spacing: 0.1em;
}
.card-img-placeholder.featured {
  background: linear-gradient(135deg, #1a1f3a 0%, #0d1230 100%);
}
.card-img-placeholder.router {
  background: linear-gradient(135deg, #2a1854 0%, #1a0f3a 100%);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  background: #06081a;
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
}
.footer-inner {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.footer-brand .logo {
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.footer-contact h4 {
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--accent-blue);
  letter-spacing: 0.1em;
}
.footer-contact p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 6px;
}
.footer-contact strong {
  color: var(--text-primary);
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
  .nav {
    gap: 16px;
  }
  .nav a {
    font-size: 0.8rem;
  }
  .hero {
    min-height: auto;
    padding: 60px 0;
  }
  .product-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .nav {
    display: none;
  } /* 移动端导航 Phase 2 再做汉堡菜单 */
  .hero-title {
    font-size: 2rem;
  }
}