/* 基础样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #333;
  scroll-behavior: smooth;
}

/* 加载动画样式 */
.logo_img_loading {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.logo_img {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20vw;
  height: auto;
}

.logo_img svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2));
}

.loading-text {
  position: absolute;
  top: 55%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  color: #fff;
  font-weight: 300;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hiddenLoading {
  animation: hiddenLoading 1s ease-in-out forwards;
}

.startLoading {
  animation: heartbeat 2s infinite ease-in-out forwards;
}

.initLoading {
  animation: initLoadAni 0.5s ease-in forwards;
}

.opactiy1 { opacity: 1; }
.opactiy0 { opacity: 0; }

@keyframes initLoadAni {
  0% {
    opacity: 0;
    transform: scale(1.1) translateY(8vw);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes hiddenLoading {
  0% { opacity: 1; }
  99% { opacity: 0; }
  100% { opacity: 0; display: none; }
}

@keyframes heartbeat {
  0%, 20%, 60%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  40%, 80% {
    transform: scale(1) translateY(-2vw);
    opacity: 0.8;
  }
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: bold;
  color: #333;
  text-decoration: none;
}

.nav-logo-img {
  width: 50px;
  height: auto;
  margin-right: 0.8rem;
}

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

.nav-menu a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-menu a:hover {
  color: #667eea;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: #667eea;
  transition: width 0.3s ease;
}

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

/* Hero区域 */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
  padding: 100px 20px 50px;
}

.hero::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: move 20s linear infinite;
}

@keyframes move {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

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

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
  animation: fadeInUp 1s ease;
}

.hero .subtitle {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  opacity: 0.95;
  animation: fadeInUp 1.2s ease;
}

.hero .description {
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  animation: fadeInUp 1.4s ease;
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1.6s ease;
}

.btn {
  padding: 1rem 2.5rem;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

.btn-primary {
  background: white;
  color: #667eea;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: white;
  color: #667eea;
}

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

/* 服务区域 */
.services {
  padding: 5rem 2rem;
  background: white;
}

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

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

.section-title h2 {
  font-size: 2.8rem;
  color: #333;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 2px;
}

.section-title p {
  font-size: 1.1rem;
  color: #666;
  max-width: 700px;
  margin: 1.5rem auto 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
}

.service-card {
  background: white;
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 5px 25px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
  border: 1px solid #f0f0f0;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(102,126,234,0.2);
}

.service-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 2rem;
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #333;
}

.service-card p {
  color: #666;
  line-height: 1.8;
}

/* 案例展示 */
.portfolio {
  padding: 5rem 2rem;
  background: #f8f9fa;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.portfolio-item {
  background: white;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 5px 25px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.portfolio-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.portfolio-image {
  height: 220px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.portfolio-tag {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255,255,255,0.9);
  color: #667eea;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
}

.portfolio-content {
  padding: 2rem;
}

.portfolio-content h3 {
  font-size: 1.4rem;
  margin-bottom: 0.8rem;
  color: #333;
}

.portfolio-content p {
  color: #666;
  line-height: 1.6;
}

/* 关于我们 */
.about {
  padding: 5rem 2rem;
  background: white;
}

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

.about-text h2 {
  font-size: 2.5rem;
  color: #333;
  margin-bottom: 1.5rem;
}

.about-text p {
  color: #666;
  margin-bottom: 1.5rem;
  line-height: 1.8;
  font-size: 1.05rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2.5rem;
}

.stat-item {
  text-align: center;
  padding: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 15px;
  color: white;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

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

.about-features {
  display: grid;
  gap: 1.5rem;
}

.feature-item {
  display: flex;
  align-items: start;
  gap: 1rem;
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 15px;
  transition: all 0.3s ease;
}

.feature-item:hover {
  background: white;
  box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.feature-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.feature-text h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: #333;
}

.feature-text p {
  color: #666;
  font-size: 0.95rem;
  margin: 0;
}

/* 联系我们 */
.contact {
  padding: 5rem 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.contact .section-title h2 {
  color: white;
}

.contact .section-title h2::after {
  background: white;
}

.contact .section-title p {
  color: rgba(255,255,255,0.9);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
}

.contact-info {
  display: grid;
  gap: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  background: rgba(255,255,255,0.1);
  border-radius: 15px;
  backdrop-filter: blur(10px);
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: rgba(255,255,255,0.2);
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-text h4 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.contact-text p {
  opacity: 0.9;
  margin: 0;
}

.contact-form {
  background: rgba(255,255,255,0.15);
  padding: 2.5rem;
  border-radius: 20px;
  backdrop-filter: blur(10px);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: none;
  border-radius: 10px;
  background: rgba(255,255,255,0.9);
  color: #333;
  font-size: 1rem;
  font-family: inherit;
}

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

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  background: white;
  box-shadow: 0 0 0 3px rgba(255,255,255,0.3);
}

/* 页脚 */
.footer {
  background: #1a1a2e;
  color: white;
  padding: 3rem 2rem 1.5rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1.5rem;
  color: #667eea;
  font-size: 1.3rem;
}

.footer-section p,
.footer-section a {
  color: #ccc;
  text-decoration: none;
  line-height: 2;
  display: block;
}

.footer-section a:hover {
  color: #667eea;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #333;
  color: #999;
}

/* 响应式设计 */
@media (max-width: 968px) {
  .nav-menu {
    display: none;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero .subtitle {
    font-size: 1.1rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .services-grid,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .services,
  .portfolio,
  .about,
  .contact {
    padding: 3rem 1rem;
  }
  
  .about-stats {
    grid-template-columns: 1fr;
  }
}

/* 滚动动画 */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

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