/* 布局 - 网格和响应式 */

/* Hero区域 */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0 var(--space-lg);
  overflow: hidden;
  background:
    radial-gradient(ellipse at 15% 25%, rgba(30, 58, 138, 0.4) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 75%, rgba(88, 28, 135, 0.3) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(15, 23, 42, 1) 0%, #020617 100%);
}

/* 星云效果 */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
  animation: nebula 20s ease-in-out infinite;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: 30%;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
  animation: nebula 15s ease-in-out infinite reverse;
  pointer-events: none;
}

/* 粒子画布 */
#particles-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* 导航栏 */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-xl);
  background: rgba(2, 6, 23, 0.7);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139, 92, 246, 0.15);
  transition: all 0.4s ease;
}

.nav.scrolled {
  padding: var(--space-sm) var(--space-xl);
  background: rgba(2, 6, 23, 0.9);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--text-on-dark);
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #e8e2d6, #d4a574);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
}

.nav-links li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-on-dark-muted);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  position: relative;
}

.nav-links li::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #d4a574, #8b5cf6);
  transition: all var(--duration-fast) var(--ease-out);
  transform: translateX(-50%);
}

.nav-links li:hover {
  color: var(--text-on-dark);
}

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

.nav-links li.active {
  color: var(--accent-primary);
}

/* 导航栏访问项目按钮 */
.nav-visit {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  text-decoration: none;
  padding: var(--space-xs) var(--space-md);
  background: rgba(212, 165, 116, 0.1);
  border: 1px solid rgba(212, 165, 116, 0.3);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.nav-visit:hover {
  background: rgba(212, 165, 116, 0.2);
  border-color: rgba(212, 165, 116, 0.5);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(212, 165, 116, 0.2);
}

.nav-visit svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav-visit:hover svg {
  transform: translate(2px, -2px);
}

/* 导航栏操作区域 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* 全部项目地址按钮 */
.nav-all-sites {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-secondary);
  text-decoration: none;
  padding: var(--space-xs) var(--space-md);
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.nav-all-sites:hover {
  background: rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.5);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}

.nav-all-sites svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav-all-sites:hover svg {
  transform: translate(2px, -2px);
}

/* Hero内容 */
.hero-content {
  text-align: center;
  z-index: 2;
  margin-top: 60px;
  position: relative;
}

.hero-title {
  margin-bottom: var(--space-lg);
  position: relative;
}

.title-line {
  display: block;
  opacity: 0;
  transform: translateY(40px) scale(0.95);
  animation: heroTitleIn 1s var(--ease-bounce) forwards;
}

.title-line:nth-child(1) {
  animation-delay: 0.3s;
  font-size: clamp(2.8rem, 7vw, 5rem);
  background: linear-gradient(135deg, #f8fafc, #e2e8f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-accent {
  color: var(--accent-primary);
  font-style: italic;
  animation-delay: 0.5s;
  font-size: clamp(3.2rem, 8vw, 6rem);
  background: linear-gradient(135deg, #d4a574, #f59e0b, #d4a574);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% auto;
  animation: heroTitleIn 1s var(--ease-bounce) forwards, shimmer 3s linear infinite;
  animation-delay: 0.5s, 1.5s;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-on-dark-muted);
  max-width: 550px;
  margin: 0 auto var(--space-2xl);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.8s forwards;
  line-height: 1.8;
}

.hero-scroll-hint {
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 1.2s forwards;
}

.hero-scroll-hint span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-on-dark-muted);
  margin-bottom: var(--space-md);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  margin: 0 auto;
  border-right: 2px solid var(--accent-primary);
  border-bottom: 2px solid var(--accent-primary);
  transform: rotate(45deg);
  animation: bounceArrow 2s var(--ease-out) infinite;
  position: relative;
}

.scroll-arrow::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(212, 165, 116, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: pulse 2s ease-in-out infinite;
}

/* 滚动进度指示器 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, #d4a574, #8b5cf6, #d4a574);
  z-index: 1000;
  transition: width 0.1s linear;
}

/* 鼠标追踪光效 */
.cursor-glow {
  position: fixed;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  mix-blend-mode: screen;
}

/* 项目区域 */
.portfolio {
  padding: var(--space-2xl) 0;
  position: relative;
  z-index: 1;
}

.project-section {
  position: relative;
  padding: var(--space-3xl) 0;
  margin-bottom: var(--space-2xl);
}

.project-section:nth-child(odd) {
  padding-left: 8%;
}

.project-section:nth-child(even) {
  padding-right: 8%;
}

/* 区域标题 */
.section-header {
  margin-bottom: var(--space-2xl);
  padding-left: var(--space-lg);
  position: relative;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-secondary);
  letter-spacing: 0.15em;
  display: block;
  margin-bottom: var(--space-sm);
  text-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.section-title {
  color: var(--text-on-dark);
  margin-bottom: var(--space-md);
  position: relative;
  display: inline-block;
  background: linear-gradient(135deg, #e2e8f0, #d4a574);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary));
  transition: width var(--duration-slow) var(--ease-smooth);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.section-header.visible .section-title::after {
  width: 100%;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-on-dark-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.section-divider {
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary));
  margin-top: var(--space-lg);
  opacity: 0.6;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-smooth);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
}

.section-header.visible .section-divider {
  transform: scaleX(1);
}

/* 子区域 */
.sub-section {
  margin-bottom: var(--space-xl);
}

.sub-title {
  font-family: var(--font-heading);
  font-style: italic;
  color: var(--text-on-dark-muted);
  margin-bottom: var(--space-lg);
  padding-left: var(--space-md);
  font-size: 1.2rem;
  position: relative;
}

.sub-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  background: var(--accent-secondary);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.6);
}

/* 卡片网格 - 瀑布流 */
.card-grid {
  column-count: 3;
  column-gap: var(--space-lg);
  padding: 0 var(--space-xl);
}

/* 响应式断点 */
@media (max-width: 1200px) {
  .card-grid {
    column-count: 2;
    padding: 0 var(--space-lg);
  }

  .project-section:nth-child(odd),
  .project-section:nth-child(even) {
    padding-left: 5%;
    padding-right: 5%;
  }
}

@media (max-width: 900px) {
  .nav {
    padding: var(--space-md);
  }

  .nav-links {
    gap: var(--space-md);
  }

  .nav-links li {
    font-size: 0.75rem;
  }

  .hero {
    padding: var(--space-2xl) var(--space-md);
  }

  .card-grid {
    column-count: 2;
    column-gap: var(--space-md);
    padding: 0 var(--space-md);
  }

  .project-section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 600px) {
  .nav-links {
    gap: var(--space-sm);
  }

  .card-grid {
    column-count: 1;
    padding: 0 var(--space-md);
  }

  .section-header {
    padding-left: var(--space-md);
  }

  .project-section:nth-child(odd),
  .project-section:nth-child(even) {
    padding-left: 0;
    padding-right: 0;
  }
}

/* 页脚 */
.footer {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  border-top: 1px solid rgba(139, 92, 246, 0.2);
  position: relative;
  z-index: 1;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.5), transparent);
}

.footer p {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-on-dark-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.footer p::before,
.footer p::after {
  content: '~';
  margin: 0 var(--space-sm);
  color: var(--accent-secondary);
  opacity: 0.5;
}