/* ===== 全局变量和重置 ===== */
:root {
  --primary-color: #00f0ff;
  --secondary-color: #7b2ff7;
  --accent-color: #ff006e;
  --bg-dark: #0a0a0f;
  --bg-darker: #050508;
  --bg-card: #121218;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --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%);
  --gradient-tech: linear-gradient(135deg, #00f0ff 0%, #7b2ff7 100%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== 背景效果 ===== */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

.bg-gradient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

.orb-1 {
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--gradient-tech);
}

.orb-2 {
  bottom: -20%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: var(--gradient-2);
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.1);
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  padding: 0.5rem 0;
  background: rgba(10, 10, 15, 0.95);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 35px;
  height: 35px;
  background: var(--gradient-tech);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2.5rem;
  align-items: center;
}

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

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary-color);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-tech);
  transition: width 0.3s ease;
}

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

.lang-switcher {
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  color: var(--primary-color);
  padding: 0.5rem 1rem;
  border-radius: 25px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
}

.lang-switcher:hover {
  background: rgba(0, 240, 255, 0.2);
  transform: translateY(-2px);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--primary-color);
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* ===== 主要内容区域 ===== */
.main-content {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding-top: 80px;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== Hero 区域 ===== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #00f0ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text .subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

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

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

.btn-primary {
  background: var(--gradient-tech);
  color: white;
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 240, 255, 0.5);
}

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

.btn-secondary:hover {
  background: rgba(0, 240, 255, 0.1);
  transform: translateY(-3px);
}

.hero-visual {
  position: relative;
  height: 500px;
}

.tech-card {
  position: absolute;
  background: rgba(18, 18, 24, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transition: all 0.3s ease;
}

.tech-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary-color);
  box-shadow: 0 25px 70px rgba(0, 240, 255, 0.3);
}

.tech-card-1 {
  top: 0;
  left: 0;
  width: 200px;
}

.tech-card-2 {
  top: 50%;
  right: 0;
  width: 220px;
  transform: translateY(-50%);
}

.tech-card-3 {
  bottom: 0;
  left: 20%;
  width: 180px;
}

.tech-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-tech);
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1rem;
}

.tech-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.tech-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== 区块标题 ===== */
.section {
  padding: 6rem 0;
  position: relative;
}

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

.section-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 0%, #00f0ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background: rgba(18, 18, 24, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 240, 255, 0.1);
  border-radius: 20px;
  padding: 2.5rem;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-tech);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: -1;
}

.card:hover {
  transform: translateY(-10px);
  border-color: var(--primary-color);
  box-shadow: 0 20px 60px rgba(0, 240, 255, 0.2);
}

.card:hover::before {
  opacity: 0.05;
}

.card-icon {
  width: 70px;
  height: 70px;
  background: var(--gradient-tech);
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

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

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

/* ===== 统计数据 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
  padding: 2rem;
}

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

.stat-label {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid rgba(0, 240, 255, 0.1);
  padding: 4rem 0 2rem;
  margin-top: 6rem;
}

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

.footer-section h3 {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

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

.footer-links a:hover {
  color: var(--primary-color);
  padding-left: 5px;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-link:hover {
  background: rgba(0, 240, 255, 0.2);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(0, 240, 255, 0.1);
  color: var(--text-secondary);
}

.footer-bottom a {
  color: var(--primary-color);
  text-decoration: none;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

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

  .hero-visual {
    height: 400px;
  }

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

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(10, 10, 15, 0.98);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    transition: left 0.3s ease;
  }

  .nav-menu.active {
    left: 0;
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

  .hero-text .subtitle {
    font-size: 1.1rem;
  }

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

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

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

  .tech-card {
    position: relative !important;
    margin-bottom: 1rem;
    width: 100% !important;
    transform: none !important;
  }

  .hero-visual {
    height: auto;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.floating {
  animation: float 3s ease-in-out infinite;
}

/* ===== 页面特定样式 ===== */
.page-header {
  padding: 8rem 0 4rem;
  text-align: center;
  position: relative;
}

.page-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 0%, #00f0ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.content-section {
  background: rgba(18, 18, 24, 0.4);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 240, 255, 0.1);
  border-radius: 20px;
  padding: 3rem;
  margin-bottom: 2rem;
}

.content-section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.content-section h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.content-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.content-section ul,
.content-section ol {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-left: 2rem;
  margin-bottom: 1rem;
}

.content-section li {
  margin-bottom: 0.5rem;
}

/* ===== 联系表单 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.5rem;
  background: rgba(18, 18, 24, 0.4);
  border-radius: 15px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(0, 240, 255, 0.1);
  transition: all 0.3s ease;
}

.contact-info-item:hover {
  border-color: var(--primary-color);
  transform: translateX(5px);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-tech);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-info-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.contact-info-item p,
.contact-info-item a {
  color: var(--text-secondary);
  text-decoration: none;
}

.contact-info-item a:hover {
  color: var(--primary-color);
}

.contact-form {
  background: rgba(18, 18, 24, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 240, 255, 0.1);
  border-radius: 20px;
  padding: 2.5rem;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 1rem;
  background: rgba(10, 10, 15, 0.5);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  background: rgba(10, 10, 15, 0.8);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}