:root {
  --color-bg-primary: #0a0e1a;
  --color-bg-secondary: #111827;
  --color-bg-tertiary: #1a2332;
  --color-text-primary: #e5e7eb;
  --color-text-secondary: #9ca3af;
  --color-accent: #06b6d4;
  --color-accent-hover: #0891b2;
  --color-border: #1f2937;
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Navbar */
.navbar {
  background-color: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.navbar-brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.brand-title {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.nav-link {
  color: var(--color-text-secondary) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: var(--color-accent) !important;
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.greeting {
  font-size: 1.125rem;
  color: var(--color-accent);
  margin-bottom: 1rem;
  font-weight: 500;
}

.hero-name {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: 2rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-block;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg-primary);
  border: 2px solid var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(6, 182, 212, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background-color: var(--color-accent);
  color: var(--color-bg-primary);
  transform: translateY(-2px);
}

/* Code Window */
.hero-visual {
  position: relative;
}

.code-window {
  background-color: var(--color-bg-secondary);
  border-radius: 0.75rem;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--color-border);
}

.window-header {
  background-color: var(--color-bg-tertiary);
  padding: 0.75rem 1rem;
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red {
  background-color: #ef4444;
}
.dot-yellow {
  background-color: #f59e0b;
}
.dot-green {
  background-color: #10b981;
}

.window-body {
  padding: 1.5rem;
  font-family: "Courier New", monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  min-height: 300px;
}

.window-body code {
  color: var(--color-accent);
}

/* Section */
.section {
  padding: 80px 0;
}

.section-dark {
  background-color: var(--color-bg-secondary);
}

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

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-line {
  width: 60px;
  height: 4px;
  background-color: var(--color-accent);
  margin: 0 auto 1rem;
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

/* About Section */
.about-content {
  font-size: 1.0625rem;
  line-height: 1.8;
}

.about-content .lead {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
}

.advantages-list {
  margin-top: 2rem;
}

.advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 1rem;
  background-color: var(--color-bg-secondary);
  border-radius: 0.5rem;
  border-left: 3px solid var(--color-accent);
}

.advantage-item i {
  color: var(--color-accent);
  font-size: 1.25rem;
  margin-top: 0.25rem;
}

/* Info Cards */
.info-cards {
  display: grid;
  gap: 1.5rem;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  background-color: var(--color-bg-secondary);
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.info-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.2);
}

.info-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(6, 182, 212, 0.1);
  border-radius: 0.5rem;
  color: var(--color-accent);
  font-size: 1.5rem;
}

.info-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.info-value {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}

.timeline-marker {
  position: absolute;
  left: -2.5rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  background-color: var(--color-accent);
  border-radius: 50%;
  border: 3px solid var(--color-bg-secondary);
}

.timeline-content {
  background-color: var(--color-bg-tertiary);
  padding: 2rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.timeline-header h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.timeline-period {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  background-color: rgba(6, 182, 212, 0.1);
  border-radius: 0.25rem;
}

.timeline-company {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.0625rem;
}

.timeline-company i {
  margin-right: 0.5rem;
  color: var(--color-accent);
}

.timeline-highlights {
  list-style: none;
  padding: 0;
}

.timeline-highlights li {
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  position: relative;
  line-height: 1.8;
}

.timeline-highlights li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

.timeline-highlights strong {
  color: var(--color-accent);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--color-bg-secondary);
  border-radius: 0.75rem;
  padding: 2rem;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-accent);
  box-shadow: 0 20px 40px rgba(6, 182, 212, 0.2);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.project-name {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.project-period {
  font-size: 0.875rem;
  color: var(--color-accent);
}

.project-role {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(6, 182, 212, 0.1);
  color: var(--color-accent);
  border-radius: 0.25rem;
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.project-description {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  padding: 0.375rem 0.75rem;
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border-radius: 0.25rem;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
}

.project-features {
  list-style: none;
  padding: 0;
}

.project-features li {
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  position: relative;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.project-features li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.project-impact {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-style: italic;
  color: var(--color-text-secondary);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.skill-card {
  background-color: var(--color-bg-tertiary);
  border-radius: 0.75rem;
  padding: 2rem;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.skill-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
}

.skill-category {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.skill-category::before {
  content: "";
  width: 4px;
  height: 24px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-item {
  padding: 0.5rem 1rem;
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border-radius: 0.375rem;
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.skill-item:hover {
  background-color: rgba(6, 182, 212, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Contact Cards */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background-color: var(--color-bg-secondary);
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
}

.contact-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.2);
}

.contact-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(6, 182, 212, 0.1);
  border-radius: 0.5rem;
  color: var(--color-accent);
  font-size: 1.5rem;
}

.contact-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.contact-value {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Footer */
.footer {
  background-color: var(--color-bg-secondary);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer p {
  color: var(--color-text-secondary);
  margin: 0;
}

/* Responsive */
@media (max-width: 991px) {
  .hero-name {
    font-size: 3rem;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .hero-stats {
    gap: 2rem;
  }

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

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

@media (max-width: 767px) {
  .hero-name {
    font-size: 2.5rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

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

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-marker {
    left: -2rem;
  }

  .timeline-header {
    flex-direction: column;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}