/* ==================== 全局样式 ==================== */
:root {
  /* 颜色变量 */
  --primary-color: #00d4ff;
  --secondary-color: #7c3aed;
  --accent-color: #f72585;
  --dark-bg: #0a0e27;
  --darker-bg: #050814;
  --card-bg: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  --gradient-3: linear-gradient(135deg, #f72585 0%, #7c3aed 100%);

  /* 间距 */
  --section-padding: 100px 0;
  --container-padding: 0 50px;

  /* 阴影 */
  --shadow-sm: 0 2px 10px rgba(0, 212, 255, 0.1);
  --shadow-md: 0 10px 40px rgba(0, 212, 255, 0.2);
  --shadow-lg: 0 20px 60px rgba(0, 212, 255, 0.3);

  /* 动画 */
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ==================== 粒子背景 ==================== */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(180deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
}

/* ==================== 容器 ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--container-padding);
}

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-base);
  background: rgba(10, 14, 39, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar.scrolled {
  padding: 15px 0;
  background: rgba(10, 14, 39, 0.95);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 15px;
}

.nav-logo img {
  width: 50px;
  height: 50px;
  transition: var(--transition-base);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.company-name {
  font-size: 20px;
  font-weight: 700;
  background: var(--gradient-2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.company-name-en {
  font-size: 10px;
  color: var(--text-secondary);
  letter-spacing: 2px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 40px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: var(--transition-base);
  padding: 5px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-2);
  transition: var(--transition-base);
}

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

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

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

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: var(--transition-base);
  border-radius: 3px;
}

/* ==================== Hero Section ==================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 150px 50px 100px;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(103, 126, 234, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  max-width: 1200px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1.hero-title {
  font-size: 56px;
  font-weight: 800;
  margin-bottom: 20px;
  background: var(--gradient-2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-text h2.hero-subtitle {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 30px;
  color: var(--text-primary);
}

.hero-description {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 20px;
}

.btn {
  padding: 15px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-base);
  display: inline-block;
  border: none;
  cursor: pointer;
  font-size: 16px;
}

.btn-primary {
  background: var(--gradient-2);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: var(--primary-color);
  color: var(--dark-bg);
}

/* Hero 图形元素 */
.hero-image {
  position: relative;
  height: 500px;
}

.floating-element {
  position: absolute;
  width: 400px;
  height: 400px;
  background: var(--gradient-2);
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  opacity: 0.15;
  filter: blur(60px);
  animation: float 6s ease-in-out infinite;
}

.floating-element::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  background: var(--gradient-3);
  border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
  opacity: 0.2;
  filter: blur(40px);
  animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-30px) rotate(10deg);
  }
}

/* 滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 50px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 10px;
}

.scroll-indicator span {
  width: 4px;
  height: 10px;
  background: var(--primary-color);
  border-radius: 2px;
  animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(20px);
    opacity: 0;
  }
}

/* ==================== 动画类 ==================== */
.fade-in {
  animation: fadeIn 1s ease-out;
}

.fade-in-delay {
  animation: fadeIn 1s ease-out 0.3s both;
}

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

/* ==================== Section 通用样式 ==================== */
section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-tag {
  display: inline-block;
  color: var(--primary-color);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  margin-bottom: 15px;
  text-transform: uppercase;
}

.section-title {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  background: var(--gradient-2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-line {
  width: 80px;
  height: 4px;
  background: var(--gradient-2);
  margin: 0 auto;
  border-radius: 2px;
}

/* ==================== 业务板块 ==================== */
.business-section {
  background: rgba(0, 0, 0, 0.2);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.business-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-2);
  transform: scaleX(0);
  transition: var(--transition-base);
}

.business-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

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

.card-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-2);
  border-radius: 20px;
  transition: var(--transition-base);
}

.business-card:hover .card-icon {
  transform: rotateY(360deg);
}

.card-icon svg {
  width: 40px;
  height: 40px;
  stroke: white;
}

.business-card h3 {
  font-size: 22px;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.business-card p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 14px;
}

.card-hover-effect {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: var(--transition-slow);
  pointer-events: none;
}

.business-card:hover .card-hover-effect {
  opacity: 1;
}

/* ==================== 案例展示 ==================== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.case-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition-base);
  cursor: pointer;
}

.case-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.case-image {
  position: relative;
  overflow: hidden;
  height: 250px;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.case-card:hover .case-image img {
  transform: scale(1.1);
}

.case-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-base);
}

.case-card:hover .case-overlay {
  opacity: 1;
}

.case-overlay-content {
  text-align: center;
  transform: translateY(20px);
  transition: var(--transition-base);
}

.case-card:hover .case-overlay-content {
  transform: translateY(0);
}

.case-overlay-content h4 {
  font-size: 20px;
  margin-bottom: 10px;
}

.case-overlay-content p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.btn-view {
  background: var(--gradient-2);
  color: white;
  border: none;
  padding: 10px 25px;
  border-radius: 25px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition-base);
}

.btn-view:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.case-info {
  padding: 25px;
}

.case-category {
  display: inline-block;
  background: rgba(0, 212, 255, 0.2);
  color: var(--primary-color);
  padding: 5px 15px;
  border-radius: 15px;
  font-size: 12px;
  margin-bottom: 15px;
}

.case-info h3 {
  font-size: 18px;
  color: var(--text-primary);
}

/* ==================== 合作客户 ==================== */
.clients-section {
  background: rgba(0, 0, 0, 0.2);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 20px;
}

.client-logo {
  aspect-ratio: 1;
}

.client-card {
  width: 100%;
  height: 100%;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
  padding: 20px;
}

.client-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.client-name {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 600;
  text-align: center;
  transition: var(--transition-base);
}

.client-card:hover .client-name {
  color: var(--primary-color);
}

/* ==================== 关于我们 ==================== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  margin-bottom: 80px;
}

.about-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(103, 126, 234, 0.3), rgba(0, 212, 255, 0.3));
  mix-blend-mode: overlay;
}

.about-text h3 {
  font-size: 32px;
  margin-bottom: 25px;
  background: var(--gradient-2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
  text-indent: 2em;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-2);
  border-radius: 15px;
}

.feature-icon svg {
  width: 30px;
  height: 30px;
  stroke: white;
}

.feature-item h4 {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 14px;
  text-indent: 0;
}

.why-choose-us {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.choose-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 30px;
  transition: var(--transition-base);
}

.choose-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.choose-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 15px;
  margin-bottom: 20px;
}

.choose-card h4 {
  font-size: 18px;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.choose-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 8px;
  line-height: 1.6;
}

/* ==================== 联系我们 ==================== */
.contact-section {
  background: rgba(0, 0, 0, 0.2);
  padding: 60px 0;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 60px;
  max-width: 800px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.contact-item svg {
  width: 50px;
  height: 50px;
  stroke: var(--primary-color);
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.contact-item p {
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.contact-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-base);
}

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

/* ==================== 页脚 ==================== */
.footer {
  background: var(--darker-bg);
  padding: 30px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  text-align: center;
}

.footer-content p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 10px;
}

.footer-content a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-base);
}

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

/* ==================== 侧边工具栏 ==================== */
.sidebar-tools {
  position: fixed;
  right: 30px;
  bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  z-index: 999;
}

.tool-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-2);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
  position: relative;
}

.tool-btn:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.tool-btn svg {
  width: 24px;
  height: 24px;
  stroke: white;
  stroke-width: 2;
}

.contact-popup {
  position: absolute;
  right: 70px;
  bottom: 0;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 15px 20px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
}

.contact-btn:hover .contact-popup {
  opacity: 1;
  visibility: visible;
}

.contact-popup p {
  color: var(--text-secondary);
  font-size: 12px;
  margin-bottom: 8px;
}

.contact-popup a {
  display: block;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 5px;
}

.contact-popup a:hover {
  text-decoration: underline;
}

/* ==================== 模态框 ==================== */
.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
}

.modal-content {
  margin: auto;
  display: block;
  max-width: 90%;
  max-height: 90%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 10px;
}

.modal-close {
  position: absolute;
  top: 30px;
  right: 50px;
  color: #f1f1f1;
  font-size: 50px;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition-base);
  z-index: 10000;
}

.modal-close:hover {
  color: var(--primary-color);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .business-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .clients-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-image {
    height: 300px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: 40px;
    gap: 20px;
    transition: var(--transition-base);
  }

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

  .nav-toggle {
    display: flex;
  }

  .hero-text h1.hero-title {
    font-size: 40px;
  }

  .hero-text h2.hero-subtitle {
    font-size: 32px;
  }

  .section-title {
    font-size: 36px;
  }

  .business-grid,
  .cases-grid,
  .why-choose-us {
    grid-template-columns: 1fr;
  }

  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .about-features {
    grid-template-columns: 1fr;
  }

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

  .container,
  .nav-container {
    padding: 0 20px;
  }

  .hero-section {
    padding: 120px 20px 80px;
  }
}

@media (max-width: 480px) {
  .hero-text h1.hero-title {
    font-size: 32px;
  }

  .hero-text h2.hero-subtitle {
    font-size: 24px;
  }

  .hero-description {
    font-size: 16px;
  }

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

  .btn {
    width: 100%;
    text-align: center;
  }

  .section-title {
    font-size: 28px;
  }

  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}