/**
 * IDPV Lab 自定义样式覆盖
 * 融合 Vercel + Linear + Notion + Figma 设计系统
 */

/* ===== 导入设计系统变量 ===== */
@import './custom-variables.css';
@import './custom-animations.css';

/* ===== 导航栏优化 - Vercel 风格 ===== */
.VPNavBar {
  backdrop-filter: blur(12px) !important;
  background: rgba(255, 255, 255, 0.8) !important;
  border-bottom: 1px solid var(--border-color) !important;
}

.dark .VPNavBar {
  background: rgba(13, 13, 13, 0.8) !important;
}

.VPNavBar .title {
  font-weight: 700 !important;
  letter-spacing: -0.02em !important;
}

/* 导航链接下划线动画 */
.VPNavBarMenuLink {
  position: relative !important;
  transition: color var(--transition-fast) !important;
}

.VPNavBarMenuLink::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base) !important;
}

.VPNavBarMenuLink.active::after,
.VPNavBarMenuLink:hover::after {
  width: 100%;
}

/* ===== Hero 区域重构 ===== */
.VPHero {
  position: relative !important;
  padding: 120px 24px 80px !important;
  min-height: 80vh !important;
  display: flex !important;
  align-items: center !important;
}

/* 网格背景 */
.VPHero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 40%, transparent 80%);
  z-index: 0;
  pointer-events: none;
}

/* 渐变光晕 */
.VPHero::after {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
  animation: float 6s ease-in-out infinite;
  pointer-events: none;
}

.VPHero .container {
  position: relative !important;
  z-index: 1 !important;
}

/* 标题渐变 */
.VPHero .name {
  background: var(--gradient-primary) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
  font-size: var(--text-5xl) !important;
  font-weight: 800 !important;
  letter-spacing: -0.02em !important;
}

@media (max-width: 768px) {
  .VPHero .name {
    font-size: var(--text-3xl) !important;
  }
}

.VPHero .tagline {
  font-size: var(--text-xl) !important;
  color: var(--vp-c-text-light) !important;
  font-weight: 500 !important;
}

/* 按钮优化 */
.VPHero .VPButton {
  border-radius: var(--radius-full) !important;
  padding: 14px 28px !important;
  font-weight: 600 !important;
  transition: all var(--transition-fast) !important;
}

.VPHero .VPButton.brand {
  background: var(--vp-c-brand) !important;
  border: 2px solid var(--vp-c-brand) !important;
}

.VPHero .VPButton.brand:hover {
  background: var(--vp-c-brand-light) !important;
  border-color: var(--vp-c-brand-light) !important;
  transform: translateY(-2px) !important;
  box-shadow: var(--shadow-lg) !important;
}

.VPHero .VPButton.alt {
  background: transparent !important;
  color: var(--vp-c-text) !important;
  border: 2px solid var(--border-color) !important;
}

.VPHero .VPButton.alt:hover {
  border-color: var(--vp-c-text) !important;
  transform: translateY(-2px) !important;
  box-shadow: var(--shadow-md) !important;
}

/* ===== 研究卡片优化 - Linear 风格 ===== */
.VPFeature {
  border-radius: var(--radius-lg) !important;
  border: 1px solid var(--border-color) !important;
  transition: all var(--transition-base) !important;
  overflow: hidden !important;
}

.VPFeature::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base) !important;
}

.VPFeature:hover {
  transform: translateY(-4px) !important;
  box-shadow: var(--shadow-lg) !important;
  border-color: transparent !important;
}

.VPFeature:hover::before {
  opacity: 1 !important;
}

.VPFeature .title {
  font-size: var(--text-xl) !important;
  font-weight: 700 !important;
  margin-bottom: 8px !important;
}

.VPFeature .details {
  color: var(--vp-c-text-light) !important;
  line-height: 1.6 !important;
}

/* 研究方向颜色 */
.VPFeature:nth-child(1) .title {
  background: linear-gradient(135deg, #f24e1e 0%, #fa7921 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.VPFeature:nth-child(2) .title {
  background: linear-gradient(135deg, #a259ff 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.VPFeature:nth-child(3) .title {
  background: linear-gradient(135deg, #18a0fb 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.VPFeature:nth-child(4) .title {
  background: linear-gradient(135deg, #00c68f 0%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== 统计卡片优化 ===== */
.stats-section .stat-card {
  position: relative;
  padding: 32px 24px;
  background: var(--vp-c-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.stats-section .stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.stats-section .stat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.stats-section .stat-number {
  font-size: var(--text-3xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.stats-section .stat-label {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--vp-c-text);
  margin-bottom: 4px;
}

.stats-section .stat-detail {
  font-size: var(--text-sm);
  color: var(--vp-c-text-light);
}

/* ===== 内容区域优化 - Notion 风格 ===== */
.vp-doc {
  font-family: var(--font-sans) !important;
  line-height: 1.7 !important;
}

.vp-doc h1,
.vp-doc h2,
.vp-doc h3 {
  font-family: var(--font-serif) !important;
  font-weight: 700 !important;
  letter-spacing: -0.02em !important;
  margin-top: 2em !important;
}

.vp-doc h1 {
  font-size: var(--text-4xl) !important;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.vp-doc h2 {
  font-size: var(--text-2xl) !important;
  padding-bottom: 0.5em !important;
  border-bottom: 1px solid var(--border-color) !important;
}

.vp-doc a {
  color: #7c3aed !important;
  text-decoration: none !important;
  transition: color var(--transition-fast) !important;
}

.vp-doc a:hover {
  color: #5e6ad2 !important;
  text-decoration: underline !important;
}

/* ===== 页脚优化 ===== */
.VPFooter {
  border-top: 1px solid var(--border-color) !important;
  padding: 40px 24px !important;
  background: var(--vp-c-bg-alt) !important;
}

.VPFooter .message {
  color: var(--vp-c-text-light) !important;
  font-size: var(--text-sm) !important;
}

.VPFooter .message a {
  color: #7c3aed !important;
}

/* ===== 暗色模式支持 ===== */
.dark .VPNavBar {
  border-bottom-color: #333 !important;
}

.dark .vp-doc h2 {
  border-bottom-color: #333 !important;
}

/* ===== 移动端优化 ===== */
@media (max-width: 768px) {
  .VPHero {
    padding: 80px 20px 60px !important;
  }
  
  .VPHero .name {
    font-size: var(--text-3xl) !important;
  }
  
  .VPHero .tagline {
    font-size: var(--text-lg) !important;
  }
  
  .VPHero .actions {
    flex-direction: column !important;
    align-items: center !important;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}