/* =========================================================================
   设计体系 (Design System)
   定位：科技、前沿、沉浸感、高级 AI 控制台
   色彩：星空黑底 + 发光渐变蓝紫 + 毛玻璃质感
========================================================================= */

:root {
  /* 颜色层级 - 暗黑主调 */
  --bg-dark: #0A0A0C;
  --bg-darker: #050506;
  --bg-surface: rgba(255, 255, 255, 0.03);
  --bg-surface-hover: rgba(255, 255, 255, 0.06);
  
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-tertiary: rgba(255, 255, 255, 0.4);
  
  --border-light: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(59, 130, 246, 0.3);
  
  /* 强调色：科技极客发光蓝紫 */
  --accent-brand: #3B82F6;
  --accent-brand-hover: #60A5FA;
  --accent-glow: 0 0 20px rgba(59, 130, 246, 0.6);
  --gradient-main: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  
  /* 尺寸与排版 */
  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: 'Noto Serif SC', serif;
  
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  
  /* 毛玻璃 */
  --blur-md: blur(12px);
  --blur-lg: blur(24px);
}

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

body.dark-theme {
  font-family: var(--font-base);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: opacity 0.6s ease;
}

body.page-transition-out {
  opacity: 0;
  pointer-events: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* 玻璃拟物组件 */
.glass {
  background: rgba(10, 10, 12, 0.6);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border-bottom: 1px solid var(--border-light);
}

.glass-panel {
  background: var(--bg-surface);
  backdrop-filter: var(--blur-md);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.hover-glow {
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.hover-glow:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-glow);
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.1);
  transform: translateY(-4px);
}

.text-gradient {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* =========================================
   1. 导航栏 (Navbar)
========================================= */
header.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: var(--space-sm) 0;
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 2px;
}

.logo-mark {
  color: var(--accent-brand);
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-btn-ai {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  padding: 8px 16px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-brand) !important;
  font-weight: 600;
}

.nav-btn-ai i {
  animation: pulse-glow 2s infinite alternate;
}

.nav-btn-ai:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent-brand);
  box-shadow: var(--accent-glow);
}

/* =========================================
   2. 首屏核心 (Hero & AI Input)
========================================= */
.hero-ai {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 80px;
  overflow: hidden;
}

/* 背景呼吸光球 */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  opacity: 0.5;
  animation: float 10s ease-in-out infinite;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: var(--accent-brand);
  top: 10%;
  right: 15%;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: #8B5CF6;
  bottom: -10%;
  left: -5%;
  animation-delay: -5s;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  letter-spacing: 1px;
}

.hero-title {
  font-size: 4rem;
  margin-bottom: var(--space-sm);
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  font-family: var(--font-base);
  font-weight: 300;
}

/* 控制台容器 */
.ai-input-console {
  text-align: left;
  max-width: 700px;
  margin: 0 auto;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.console-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.console-header .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot.red { background: #FF5F56; }
.dot.yellow { background: #FFBD2E; }
.dot.green { background: #27C93F; }

.console-title {
  margin-left: auto;
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.console-body {
  padding: 8px;
  display: flex;
  align-items: center;
  background: rgba(0,0,0,0.3);
}

.input-icon {
  font-size: 1.5rem;
  color: var(--accent-brand);
  padding: 0 16px;
}

.ai-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #FFF;
  font-size: 1.1rem;
  padding: 16px 0;
  outline: none;
  font-family: var(--font-base);
}

.ai-input::placeholder {
  color: var(--text-tertiary);
}

.btn-launch-ai {
  background: var(--text-primary);
  color: var(--bg-dark);
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: 8px;
  transition: all 0.2s ease;
}

.btn-launch-ai:hover {
  background: var(--accent-brand);
  color: #FFF;
  box-shadow: var(--accent-glow);
}

.console-hints {
  padding: 16px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.hint-tag {
  background: rgba(255,255,255,0.05);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.hint-tag:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
  background: rgba(255,255,255,0.1);
}

/* =========================================
   3. 专家网格区 (Bento Grid)
========================================= */
.expert-section {
  padding: var(--space-xl) 0;
  position: relative;
}

.section-heading {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-heading h2 {
  font-size: 2.5rem;
  margin-bottom: var(--space-xs);
}

.section-heading p {
  color: var(--text-secondary);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  max-width: 1000px;
  margin: 0 auto;
}

.bento-card {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 250px;
}

.bento-large {
  grid-column: span 2;
  background: linear-gradient(to top right, rgba(255,255,255,0.02), rgba(59, 130, 246, 0.05));
}

.card-icon {
  font-size: 2.5rem;
  color: var(--accent-brand);
  margin-bottom: auto;
}

.bento-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

.bento-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* =========================================
   4. 生态区 (Ecosystem)
========================================= */
.ecosystem-section {
  padding: var(--space-xl) 0;
  background: linear-gradient(to bottom, var(--bg-dark), #030303);
}

.ecosystem-layout {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.eco-text {
  flex: 1;
}

.eco-text h2 {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eco-text p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.eco-products {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.eco-card {
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: 20px;
}

.eco-icon-wrap {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #FFF;
}

.eco-info h4 {
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.eco-info span {
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

.eco-card.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* =========================================
   5. 页脚 (Footer)
========================================= */
.cyber-footer {
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid var(--border-light);
  background: #000;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.footer-brand h3 {
  font-family: var(--font-base);
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.footer-brand span {
  color: var(--text-tertiary);
  font-weight: 400;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-contact a {
  color: var(--accent-brand);
}

.footer-contact a:hover {
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-light);
  padding-top: var(--space-md);
}

/* =========================================
   动画与响应式 (Animations & Responsive)
========================================= */
@keyframes float {
  0%   { transform: translate(0, 0); }
  33%  { transform: translate(30px, -50px); }
  66%  { transform: translate(-20px, 20px); }
  100% { transform: translate(0, 0); }
}

@keyframes pulse-glow {
  0%   { opacity: 0.6; text-shadow: none; }
  100% { opacity: 1; text-shadow: var(--accent-glow); }
}

@media (max-width: 992px) {
  .ecosystem-layout {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.5rem; }
  .bento-grid { grid-template-columns: 1fr; }
  .bento-large { grid-column: span 1; }
  .footer-content { flex-direction: column; gap: var(--space-md); }
  .nav-links { display: none; }
}