/* 基础重置与变量 */
:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #8b5cf6;
  --accent-color: #ec4899;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: rgba(255, 255, 255, 0.05);
  --border-color: rgba(255, 255, 255, 0.1);
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg-primary);
}

body {
  font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0;
  position: relative;
}

/* 导航栏 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-logo {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.5rem;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

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

.nav-link.cta {
  background: var(--gradient-1);
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  color: white;
}

.nav-link.cta::after {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* 英雄区域 */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: 0;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  animation: float 20s infinite ease-in-out;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: var(--gradient-1);
  top: -200px;
  left: -200px;
  animation-delay: 0s;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: var(--gradient-2);
  bottom: -150px;
  right: -150px;
  animation-delay: -7s;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: var(--gradient-3);
  top: 50%;
  right: 10%;
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -30px) scale(1.1);
  }
  66% {
    transform: translate(-20px, 20px) scale(0.9);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50px;
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 2rem;
  letter-spacing: 1px;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
  }
}

.pulse {
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-line {
  display: block;
  animation: fadeInUp 1s ease-out;
}

.title-line-2 {
  animation-delay: 0.2s;
  animation-fill-mode: both;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--gradient-1);
  color: white;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.magnetic {
  transition: transform 0.2s ease;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 4rem;
}

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

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.5rem;
}

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

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

.scroll-mouse {
  width: 24px;
  height: 40px;
  border: 2px solid var(--text-secondary);
  border-radius: 12px;
  position: relative;
}

.scroll-mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--text-secondary);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

/* 关于我们 */
.about {
  background: var(--bg-secondary);
}

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

.section-badge {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50px;
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.about-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.about-card:hover::before {
  transform: scaleX(1);
}

.about-card:hover {
  transform: translateY(-10px);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  filter: grayscale(1);
  transition: filter 0.3s ease;
}

.about-card:hover .card-icon {
  filter: grayscale(0);
}

.about-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.about-card p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 服务项目 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
  transition: all 0.4s ease;
  position: relative;
}

.service-card:hover {
  transform: translateY(-10px);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: var(--shadow-glow);
}

.service-image {
  height: 200px;
  background: var(--gradient-1);
  position: relative;
  overflow: hidden;
}

.service-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.8) 0%, rgba(139, 92, 246, 0.8) 100%);
  opacity: 0.9;
}

.service-number {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 4rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.1);
  z-index: 1;
}

.service-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1;
}

.service-content {
  padding: 2rem;
}

.service-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.service-content p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.service-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.service-features li {
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.9rem;
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: 700;
}

/* 案例展示 */
.projects {
  background: var(--bg-secondary);
}

.projects-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-item {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
  transition: all 0.4s ease;
}

.project-item:hover {
  transform: translateY(-10px);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: var(--shadow-glow);
}

.project-image {
  height: 300px;
  background: var(--gradient-1);
  position: relative;
  overflow: hidden;
}

.project-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.8) 0%, rgba(139, 92, 246, 0.8) 100%);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
  padding: 2rem;
  text-align: center;
}

.project-item:hover .project-overlay {
  opacity: 1;
}

.project-overlay h4 {
  font-size: 1.5rem;
  font-weight: 700;
}

.project-overlay p {
  color: var(--text-secondary);
}

.project-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.project-link:hover {
  color: var(--text-primary);
}

.project-info {
  padding: 2rem;
}

.project-info h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.project-info p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 联系我们 */
.contact {
  background: var(--bg-primary);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-info > p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 3rem;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  gap: 1.5rem;
  align-items: start;
}

.contact-icon {
  font-size: 2rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.contact-item p {
  color: var(--text-secondary);
}

.contact-form {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* 页脚 */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 4rem;
  padding-bottom: 3rem;
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-column h4 {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-column ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-column a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-column a:hover {
  color: var(--text-primary);
}

.footer-column li {
  color: var(--text-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* 动画类 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.8s ease;
}

.scale-in.active {
  opacity: 1;
  transform: scale(1);
}

.scale-card {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.6s ease;
}

.scale-card.active {
  opacity: 1;
  transform: scale(1);
}

.parallax-item {
  transition: transform 0.3s ease-out;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-list {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 2rem;
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.3s ease;
  }

  .nav-list.active {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-toggle {
    display: flex;
  }

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

  .btn {
    width: 100%;
  }

  .hero-stats {
    gap: 2rem;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }
}