/* 
 * 白趣云科技官网 - 主样式表
 * 现代风格设计，响应式布局
 */

/* 基础样式 */
:root {
  --primary-color: #4361ee;
  --secondary-color: #3a0ca3;
  --accent-color: #4cc9f0;
  --text-color: #333333;
  --text-light: #666666;
  --text-lighter: #999999;
  --bg-color: #ffffff;
  --bg-light: #f8f9fa;
  --bg-dark: #212529;
  --success-color: #2ecc71;
  --warning-color: #f39c12;
  --danger-color: #e74c3c;
  --border-color: #e9ecef;
  --border-radius: 8px;
  --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --section-padding: 100px 0;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-weight: 700;
  line-height: 1.2;
}

p {
  margin-top: 0;
  margin-bottom: 1rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--secondary-color);
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

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

.section-title {
  font-size: 2.5rem;
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--primary-color);
  background: linear-gradient(to right, var(--primary-color), var(--accent-color));
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: var(--border-radius);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.1);
  transition: var(--transition);
  z-index: -1;
}

.btn:hover::before {
  width: 100%;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

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

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

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

/* 导航栏样式 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: transparent;
  padding: 20px 0;
  transition: var(--transition);
}

.header.sticky {
  background-color: var(--bg-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 15px 0;
}

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

.logo-link {
  display: flex;
  align-items: center;
  color: var(--text-color);
}

.logo-img {
  height: 40px;
  margin-right: 10px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0 15px;
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  padding: 5px 0;
  position: relative;
}

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

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--text-color);
  transition: var(--transition);
}

/* 英雄区域样式 */
.hero {
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  overflow: hidden;
}

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 2;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 20px;
  line-height: 1.2;
  color: var(--text-color);
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 30px;
  color: var(--text-light);
}

.hero-buttons {
  display: flex;
  gap: 15px;
}

.hero-image {
  flex: 1;
  max-width: 500px;
  margin-left: 30px;
}

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
}

/* 服务区域样式 */
.services {
  padding: var(--section-padding);
  background-color: var(--bg-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.service-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius);
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  opacity: 0.05;
  transition: var(--transition);
  z-index: -1;
}

.service-card:hover {
  transform: translateY(-10px);
}

.service-card:hover::before {
  height: 100%;
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(67, 97, 238, 0.1);
  border-radius: 50%;
  color: var(--primary-color);
  font-size: 2rem;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background-color: var(--primary-color);
  color: white;
}

.service-title {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.service-description {
  color: var(--text-light);
  margin-bottom: 20px;
}

.service-link {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}

.service-link i {
  margin-left: 5px;
  transition: var(--transition);
}

.service-link:hover i {
  transform: translateX(5px);
}

/* 关于我们样式 */
.about {
  padding: var(--section-padding);
}

.about-content {
  display: flex;
  align-items: center;
  gap: 50px;
}

.about-text {
  flex: 1;
}

.about-description {
  margin-bottom: 20px;
  color: var(--text-light);
}

.about-stats {
  display: flex;
  gap: 30px;
  margin-top: 40px;
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  display: block;
  margin-bottom: 5px;
}

.stat-label {
  color: var(--text-light);
  font-weight: 500;
}

.about-image {
  flex: 1;
  max-width: 500px;
}

/* 成功案例样式 */
.cases {
  padding: var(--section-padding);
  background-color: var(--bg-light);
}

.cases-filter {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-btn {
  background: none;
  border: none;
  padding: 8px 20px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
  border-radius: 30px;
}

.filter-btn.active,
.filter-btn:hover {
  background-color: var(--primary-color);
  color: white;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
}

.case-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-10px);
}

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

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

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

.case-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

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

.case-link {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transform: translateY(20px);
  transition: var(--transition);
}

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

.case-content {
  padding: 25px;
}

.case-title {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.case-description {
  color: var(--text-light);
  margin-bottom: 15px;
}

.case-category {
  display: inline-block;
  padding: 5px 15px;
  background-color: rgba(67, 97, 238, 0.1);
  color: var(--primary-color);
  border-radius: 30px;
  font-size: 0.875rem;
  font-weight: 500;
}

.cases-more {
  text-align: center;
  margin-top: 50px;
}

/* 团队样式 */
.team {
  padding: var(--section-padding);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.team-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.team-card:hover {
  transform: translateY(-10px);
}

.team-image {
  position: relative;
  overflow: hidden;
  height: 300px;
}

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

.team-social {
  position: absolute;
  bottom: -50px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 15px 0;
  background-color: rgba(255, 255, 255, 0.9);
  transition: var(--transition);
}

.team-card:hover .team-social {
  bottom: 0;
}

.social-link {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}

.social-link:hover {
  background-color: var(--secondary-color);
  color: white;
  transform: translateY(-3px);
}

.team-content {
  padding: 25px;
  text-align: center;
}

.team-name {
  font-size: 1.25rem;
  margin-bottom: 5px;
}

.team-position {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 15px;
}

.team-description {
  color: var(--text-light);
}

/* 联系我们样式 */
.contact {
  padding: var(--section-padding);
  background-color: var(--bg-light);
}

.contact-content {
  display: flex;
  gap: 50px;
}

.contact-info {
  flex: 1;
}

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

.contact-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(67, 97, 238, 0.1);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-right: 20px;
  flex-shrink: 0;
}

.contact-text h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
}

.contact-text p {
  color: var(--text-light);
  margin-bottom: 0;
}

.contact-social {
  display: flex;
  gap: 15px;
  margin-top: 30px;
}

.contact-form {
  flex: 1;
  background-color: var(--bg-color);
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-light);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.form-group textarea {
  height: 150px;
  resize: none;
}

/* 页脚样式 */
.footer {
  background-color: var(--bg-dark);
  color: white;
  padding-top: 80px;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: 50px;
  margin-bottom: 50px;
}

.footer-logo {
  flex: 1;
  min-width: 250px;
}

.footer-logo-img {
  height: 40px;
  margin-bottom: 20px;
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0;
}

.footer-links {
  flex: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

.footer-column {
  flex: 1;
  min-width: 160px;
}

.footer-title {
  font-size: 1.2rem;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--primary-color);
}

.footer-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

.footer-menu a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-menu a:hover {
  color: white;
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.copyright {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0;
}

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

.footer-social .social-link {
  background-color: rgba(255, 255, 255, 0.1);
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--secondary-color);
  color: white;
  transform: translateY(-5px);
}

/* 响应式样式 */
@media (max-width: 1200px) {
  .hero-title {
    font-size: 3rem;
  }
}

@media (max-width: 992px) {
  .hero .container,
  .about-content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-content,
  .about-text {
    max-width: 100%;
    margin-bottom: 50px;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-image,
  .about-image {
    max-width: 400px;
    margin-left: 0;
  }
  
  .about-stats {
    justify-content: center;
  }
  
  .section-title::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .contact-content {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 70px 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .nav-list {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--bg-color);
    flex-direction: column;
    align-items: center;
    padding: 40px 0;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }
  
  .nav-list.active {
    left: 0;
  }
  
  .nav-item {
    margin: 15px 0;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }
  
  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }
  
  .hero {
    min-height: 600px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .cases-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
  
  .footer-content {
    flex-direction: column;
    gap: 30px;
  }
  
  .footer-links {
    width: 100%;
  }
}

@media (max-width: 576px) {
  :root {
    --section-padding: 50px 0;
  }
  
  .section-header {
    margin-bottom: 40px;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .about-stats {
    flex-direction: column;
    gap: 20px;
  }
  
  .contact-form {
    padding: 30px 20px;
  }
}

/* 表单响应消息样式 */
.form-response {
    margin-top: 15px;
}

.alert {
    padding: 12px 15px;
    border-radius: 5px;
    margin-bottom: 15px;
    font-size: 14px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}