/* ========================================
   融合版本 - Cyberpunk 皮肤 + 工业骨架
   ======================================== */

/* === 基础变量与重置 === */
:root {
  /* 主色调 - 霓虹蓝/紫/青 */
  --neon-blue: #00d9ff;
  --neon-purple: #b537ff;
  --neon-cyan: #00ffff;
  --neon-pink: #ff006e;

  /* 背景色 - 增加深度渐变 */
  --bg-primary: #0a0e1a;
  --bg-secondary: #0f1420;
  --bg-card: rgba(15, 20, 32, 0.85);
  --bg-glass: rgba(15, 20, 32, 0.6);

  /* 文字色 */
  --text-primary: #e0e6ed;
  --text-secondary: #8b95a8;
  --text-muted: #5a6478;

  /* 边框与阴影 - 更自然的发光 */
  --border-glow: rgba(0, 217, 255, 0.2);
  --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.3);
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.4);

  /* 字体 */
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* 动画时长 */
  --transition-fast: 0.2s;
  --transition-normal: 0.4s;
  --transition-slow: 0.6s;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  /* 融合：Cyberpunk 径向渐变 + 工业网格背景 */
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(0, 217, 255, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(181, 55, 255, 0.04) 0%, transparent 50%),
    linear-gradient(rgba(0, 217, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 217, 255, 0.025) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 50px 50px, 50px 50px;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* === 粒子背景画布 === */
#particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* === 扫描线效果 === */
.scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.12),
    rgba(0, 0, 0, 0.12) 1px,
    transparent 1px,
    transparent 2px
  );
  animation: scanline 8s linear infinite;
}

@keyframes scanline {
  0% { transform: translateY(0); }
  100% { transform: translateY(100%); }
}

/* === 容器 === */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 2;
}

/* === 导航栏 === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 0;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 217, 255, 0.15);
  z-index: 1000;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  will-change: transform;
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
}

.brand-icon {
  font-size: 1.5rem;
  color: var(--neon-blue);
  text-shadow: 0 0 10px var(--neon-blue);
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  text-decoration: none;
  border: 1px solid var(--border-glow);
  border-radius: 4px;
  background: rgba(0, 217, 255, 0.05);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 217, 255, 0.3), transparent);
  transition: left var(--transition-normal);
}

.nav-link:hover::before {
  left: 100%;
}

.nav-link:hover {
  border-color: var(--neon-blue);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.link-icon {
  font-size: 1rem;
}

/* 导航栏滚动状态 */
.navbar-scrolled {
  padding: 1rem 0;
  background: rgba(10, 14, 26, 0.95);
  box-shadow: 0 4px 20px rgba(0, 217, 255, 0.1);
}

/* === Hero 区域 === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
  position: relative;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--neon-cyan);
  border: 1px solid rgba(0, 255, 255, 0.3);
  border-radius: 20px;
  background: rgba(0, 255, 255, 0.05);
  margin-bottom: 2rem;
}

.label-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

.title-line {
  display: block;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple), var(--neon-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  animation: glitch 3s infinite;
}

.title-line::before {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 2px;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.8;
  z-index: -1;
  animation: glitch-1 2s infinite;
}

.title-line::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: -2px;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.8;
  z-index: -1;
  animation: glitch-2 3s infinite;
}

@keyframes glitch {
  0%, 90%, 100% { transform: translate(0); }
  92% { transform: translate(-2px, 2px); }
  94% { transform: translate(2px, -2px); }
  96% { transform: translate(-2px, -2px); }
  98% { transform: translate(2px, 2px); }
}

@keyframes glitch-1 {
  0%, 90%, 100% { clip-path: inset(0 0 0 0); }
  92% { clip-path: inset(10% 0 85% 0); }
  94% { clip-path: inset(80% 0 10% 0); }
  96% { clip-path: inset(50% 0 30% 0); }
}

@keyframes glitch-2 {
  0%, 90%, 100% { clip-path: inset(0 0 0 0); }
  93% { clip-path: inset(5% 0 90% 0); }
  95% { clip-path: inset(70% 0 20% 0); }
  97% { clip-path: inset(40% 0 40% 0); }
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--neon-blue);
  text-shadow: 0 0 20px rgba(0, 217, 255, 0.6);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--border-glow), transparent);
}

/* === 全息投影视觉效果 === */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 500px;
}

.hologram-container {
  position: relative;
  width: 400px;
  height: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hologram-ring {
  position: absolute;
  border: 2px solid var(--neon-blue);
  border-radius: 50%;
  opacity: 0.3;
  animation: rotate 20s linear infinite;
}

.hologram-ring:nth-child(1) {
  width: 100%;
  height: 100%;
  animation-duration: 20s;
  box-shadow: 0 0 30px rgba(0, 217, 255, 0.4);
}

.hologram-ring:nth-child(2) {
  width: 70%;
  height: 70%;
  animation-duration: 15s;
  animation-direction: reverse;
  border-color: var(--neon-purple);
  box-shadow: 0 0 30px rgba(181, 55, 255, 0.4);
}

.hologram-ring:nth-child(3) {
  width: 40%;
  height: 40%;
  animation-duration: 10s;
  border-color: var(--neon-cyan);
  box-shadow: 0 0 30px rgba(0, 255, 255, 0.4);
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hologram-core {
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, var(--neon-blue), transparent 70%);
  border-radius: 50%;
  animation: pulse-core 3s ease-in-out infinite;
  box-shadow: 0 0 60px rgba(0, 217, 255, 0.8);
}

@keyframes pulse-core {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
}

/* === 项目区域 === */
.projects {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  margin-bottom: 4rem;
  text-align: center;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.title-bracket {
  color: var(--neon-cyan);
  text-shadow: 0 0 10px var(--neon-cyan);
}

.section-line {
  width: 100px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
  margin: 0 auto;
}

/* === 项目网格 === */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

/* === 项目卡片 === */
.project-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  transition: transform var(--transition-normal);
  animation: fadeInUp 0.6s ease-out backwards;
}

.project-card[data-index="01"] { animation-delay: 0.1s; }
.project-card[data-index="02"] { animation-delay: 0.2s; }
.project-card[data-index="03"] { animation-delay: 0.3s; }
.project-card[data-index="04"] { animation-delay: 0.4s; }
.project-card[data-index="05"] { animation-delay: 0.5s; }
.project-card[data-index="06"] { animation-delay: 0.6s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-glow {
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple), var(--neon-pink));
  border-radius: 12px;
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 0;
  filter: blur(8px);
}

.project-card:hover .card-glow {
  opacity: 0.6;
}

.card-border {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid rgba(0, 217, 255, 0.2);
  border-radius: 12px;
  z-index: 1;
  transition: border-color var(--transition-normal);
}

.project-card:hover .card-border {
  border-color: var(--neon-blue);
}

.card-content {
  position: relative;
  z-index: 2;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 2rem;
  border-radius: 12px;
  height: 100%;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  will-change: transform;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 8px;
  background: rgba(0, 217, 255, 0.1);
  border: 1px solid rgba(0, 217, 255, 0.3);
  color: var(--neon-blue);
  transition: all var(--transition-fast);
}

.project-card:hover .card-icon {
  background: rgba(0, 217, 255, 0.2);
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.4);
  transform: scale(1.1);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
}

.card-index {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.card-status {
  font-family: var(--font-display);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--neon-cyan);
  padding: 0.25rem 0.5rem;
  border: 1px solid rgba(0, 255, 255, 0.3);
  border-radius: 4px;
  background: rgba(0, 255, 255, 0.05);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.card-description {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  padding: 0.375rem 0.75rem;
  border: 1px solid rgba(139, 149, 168, 0.3);
  border-radius: 4px;
  background: rgba(139, 149, 168, 0.05);
  transition: all var(--transition-fast);
}

.tag:hover {
  color: var(--neon-blue);
  border-color: var(--neon-blue);
  background: rgba(0, 217, 255, 0.1);
}

.card-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-radius: 6px;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-normal), height var(--transition-normal);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn span {
  position: relative;
  z-index: 1;
}

.btn-primary {
  color: var(--bg-primary);
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-cyan));
  border: none;
  box-shadow: 0 4px 15px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 25px rgba(0, 217, 255, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  color: var(--text-primary);
  background: rgba(0, 217, 255, 0.05);
  border: 1px solid rgba(0, 217, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(0, 217, 255, 0.1);
  border-color: var(--neon-blue);
  box-shadow: 0 0 15px rgba(0, 217, 255, 0.3);
  transform: translateY(-2px);
}

.btn-arrow {
  font-size: 1.125rem;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* === Footer === */
.footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(0, 217, 255, 0.2);
  margin-top: 6rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-brand .brand-icon {
  color: var(--neon-blue);
  text-shadow: 0 0 10px var(--neon-blue);
}

.footer-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-end;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.footer-link:hover {
  color: var(--neon-blue);
  text-shadow: 0 0 10px rgba(0, 217, 255, 0.6);
}

.link-arrow {
  font-size: 1rem;
  transition: transform var(--transition-fast);
}

.footer-link:hover .link-arrow {
  transform: translateX(4px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(0, 217, 255, 0.1);
}

.footer-copyright {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--neon-cyan);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan);
  animation: pulse 2s ease-in-out infinite;
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual {
    height: 400px;
  }

  .hologram-container {
    width: 300px;
    height: 300px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }

  .hero {
    padding: 6rem 0 3rem;
  }

  .hero-title {
    font-size: 3rem;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-links {
    align-items: flex-start;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  /* 移动端性能优化：禁用 backdrop-filter */
  .navbar,
  .card-content {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(15, 20, 32, 0.95);
  }

  /* 移动端禁用 glitch 动画 */
  .title-line {
    animation: none;
  }

  .title-line::before,
  .title-line::after {
    animation: none;
    display: none;
  }

  /* 移动端简化扫描线效果 */
  .scanlines {
    opacity: 0.3;
    animation: none;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .stat-value {
    font-size: 2rem;
  }

  .card-content {
    padding: 1.5rem;
  }

  .card-title {
    font-size: 1.25rem;
  }

  .card-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}