/* ----------------------------------------------------
   一元机场 (yiyuanjic.sbs) 视觉系统
   主题：纳米级半导体光刻 - 纯净极简浅色系 (Nanoscale Light Mode)
   底色：#F8FAFC 极简极净浅灰白 / #FFFFFF 纯白
   核心电光蓝：#0066FF / 科技蓝：#0052D4 / 深靛文本：#0F172A
---------------------------------------------------- */

:root {
  --bg-dark: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F1F5F9;
  --bg-card-featured: #0066FF;
  --bg-surface: #F1F5F9;
  
  --color-laser-cyan: #0066FF;
  --color-laser-cyan-glow: rgba(0, 102, 255, 0.2);
  --color-laser-blue: #0052D4;
  --color-laser-blue-glow: rgba(0, 82, 212, 0.25);
  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted: #64748B;
  --color-border: rgba(0, 102, 255, 0.18);
  --color-border-subtle: #E2E8F0;
  --color-border-bright: #0066FF;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Roboto Mono", Consolas, monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-dark);
  color: var(--color-text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 晶圆与微米网格底纹背景 (浅色系) */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    radial-gradient(circle at 50% 30%, rgba(0, 102, 255, 0.05) 0%, transparent 60%),
    linear-gradient(rgba(0, 102, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 102, 255, 0.04) 1px, transparent 1px);
  background-size: 100% 100%, 36px 36px, 36px 36px;
  pointer-events: none;
  z-index: -2;
}

/* 微米网格叠加层 */
.wafer-grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    repeating-radial-gradient(circle at 50% 50%, rgba(0, 102, 255, 0.02) 0, rgba(0, 102, 255, 0.02) 2px, transparent 2px, transparent 18px);
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--color-laser-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #0044CC;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 头部导航栏 Navbar (浅色模糊) */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-subtle);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.03);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  letter-spacing: 0.5px;
}

.brand-logo .chip-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #0066FF 0%, #0052D4 100%);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--color-laser-cyan-glow);
  position: relative;
}

.brand-logo .chip-icon::after {
  content: '1.0';
  font-size: 0.75rem;
  font-weight: 900;
  color: #FFFFFF;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-laser-cyan);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-laser-cyan);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  background: linear-gradient(135deg, var(--color-laser-cyan) 0%, var(--color-laser-blue) 100%);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-cta:hover {
  background: linear-gradient(135deg, #0052D4 0%, #003399 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
  color: #FFFFFF;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  background: #FFFFFF;
  color: var(--color-laser-cyan);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--color-laser-cyan);
  background: rgba(0, 102, 255, 0.05);
  color: #0052D4;
}

/* 按钮尺寸 */
.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* 模块通用样式 Section Base */
section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: rgba(0, 102, 255, 0.08);
  border: 1px solid rgba(0, 102, 255, 0.2);
  color: var(--color-laser-cyan);
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 卡片底板通用组件 (浅色卡片) */
.wafer-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-smooth);
}

.wafer-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 102, 255, 0.3), transparent);
}

.wafer-card:hover {
  border-color: var(--color-border-bright);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 15px rgba(0, 102, 255, 0.1);
}

/* 页脚 Footer (浅色页脚) */
.footer {
  background: #FFFFFF;
  border-top: 1px solid var(--color-border-subtle);
  padding: 70px 0 30px 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  margin-top: 16px;
  color: var(--color-text-secondary);
  max-width: 320px;
  line-height: 1.7;
}

.footer-col h4 {
  color: var(--color-text-primary);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  position: relative;
}

.footer-col h4::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-laser-cyan);
  margin-top: 8px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-laser-cyan);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* 响应式适配 */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .navbar .nav-links {
    display: none;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}