/* Coposoft 官网 - 主样式 */

/* ========== CSS 变量 ========== */
:root {
  /* 主色调 */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-start: #667eea;
  --primary-end: #764ba2;
  
  /* 背景色 */
  --bg-dark: #0a0a0f;
  --bg-dark-secondary: #1a1a2e;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.1);
  
  /* 强调色 */
  --accent-cyan: #00d9ff;
  --accent-orange: #ff6b35;
  --accent-green: #00f5a0;
  
  /* 文字颜色 */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  
  /* 边框 */
  --border-color: rgba(255, 255, 255, 0.1);
  
  /* 毛玻璃效果 */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: blur(10px);
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.3);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 字体 */
  --font-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ========== 基础重置 ========== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-gradient);
  border-radius: 4px;
}

/* ========== 文字样式 ========== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ========== 容器 ========== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header .subtitle {
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 15px;
}

.section-header h2 {
  margin-bottom: 20px;
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(102, 126, 234, 0.5);
  color: white;
}

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

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-ghost {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
  background: var(--bg-card-hover);
}

/* ========== 导航栏 ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: var(--glass-blur);
  padding: 15px 0;
  box-shadow: var(--shadow-md);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar-brand .logo {
  width: 40px;
  height: 40px;
  background: var(--primary-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
}

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

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}

.navbar-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: width var(--transition-normal);
}

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

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

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 5px;
}

.navbar-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

/* ========== Hero 区域 ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-secondary) 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 70%, rgba(118, 75, 162, 0.15) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(2%, 2%) rotate(1deg); }
  50% { transform: translate(0, 4%) rotate(0deg); }
  75% { transform: translate(-2%, 2%) rotate(-1deg); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(102, 126, 234, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 126, 234, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 20px;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  font-size: 0.9rem;
  color: var(--accent-cyan);
  margin-bottom: 30px;
  animation: fadeInDown 0.8s ease;
}

.hero-title {
  margin-bottom: 25px;
  animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-title .highlight {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 40px;
  animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.6s backwards;
}

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

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

/* ========== 卡片 ========== */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all var(--transition-normal);
}

.card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 15px;
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ========== 服务区域 ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.service-card {
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

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

/* ========== 统计数字 ========== */
.stats {
  background: var(--primary-gradient);
  padding: 80px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}

.stat-item {
  color: white;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.9;
}

/* ========== 案例展示 ========== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/10;
  cursor: pointer;
}

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

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

.case-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 30px;
  transition: background var(--transition-normal);
}

.case-card:hover .case-card-overlay {
  background: linear-gradient(to top, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.5) 100%);
}

.case-card-category {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.case-card-title {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

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

/* ========== 博客 ========== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.blog-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.blog-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.blog-card-content {
  padding: 25px;
}

.blog-card-date {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.blog-card-title {
  font-size: 1.25rem;
  margin-bottom: 15px;
  transition: color var(--transition-fast);
}

.blog-card:hover .blog-card-title {
  color: var(--accent-cyan);
}

.blog-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ========== 联系表单 ========== */
.contact-section {
  background: linear-gradient(135deg, var(--bg-dark-secondary) 0%, var(--bg-dark) 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.contact-info h3 {
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 30px;
}

.contact-item-icon {
  width: 50px;
  height: 50px;
  background: var(--primary-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item-content h4 {
  font-size: 1.1rem;
  margin-bottom: 5px;
}

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

.contact-form {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 25px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 15px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-start);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-dark-secondary);
  padding: 80px 0 30px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .brand-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-brand p {
  color: var(--text-muted);
  margin-bottom: 25px;
}

.footer-social {
  display: flex;
  gap: 15px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--primary-gradient);
  color: white;
  border-color: transparent;
}

.footer-column h4 {
  font-size: 1.1rem;
  margin-bottom: 25px;
  color: var(--text-primary);
}

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

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .navbar-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-dark-secondary);
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    transition: right var(--transition-normal);
  }
  
  .navbar-menu.active {
    right: 0;
  }
  
  .navbar-toggle {
    display: flex;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-description {
    font-size: 1.1rem;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .cases-grid,
  .blog-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== 动画类 ========== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

/* ========== 页面头部 ========== */
.page-header {
  padding: 150px 0 80px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-secondary) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.page-header h1 {
  margin-bottom: 20px;
}

.page-header p {
  max-width: 600px;
  margin: 0 auto;
}

/* ========== 时间轴 ========== */
.timeline {
  position: relative;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 50px 50px;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: 0;
  width: 16px;
  height: 16px;
  background: var(--primary-gradient);
  border-radius: 50%;
}

.timeline-item:nth-child(odd)::before {
  right: -8px;
}

.timeline-item:nth-child(even)::before {
  left: -8px;
}

.timeline-year {
  color: var(--accent-cyan);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.timeline-content h3 {
  margin-bottom: 10px;
}

@media (max-width: 768px) {
  .timeline::before {
    left: 20px;
  }
  
  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding-left: 50px;
    padding-right: 0;
    text-align: left !important;
  }
  
  .timeline-item::before {
    left: 12px !important;
    right: auto !important;
  }
}

/* ========== CTA 区域 ========== */
.cta-section {
  background: var(--primary-gradient);
  padding: 100px 0;
  text-align: center;
}

.cta-section h2 {
  color: white;
  margin-bottom: 20px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto 40px;
}

.cta-section .btn-secondary {
  background: white;
  color: var(--primary-start);
  border: none;
}

.cta-section .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--primary-end);
}

/* ========== 加载动画 ========== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.loading-dot {
  width: 10px;
  height: 10px;
  background: var(--primary-gradient);
  border-radius: 50%;
  animation: loadingBounce 1.4s ease-in-out infinite both;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes loadingBounce {
  0%, 80%, 100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

/* ========== Toast 提示 ========== */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 15px 25px;
  background: var(--bg-dark-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 9999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  border-color: var(--accent-green);
}

.toast.error {
  border-color: var(--accent-orange);
}