/* 杏彩体育 - 杏彩体育官网｜XC SPORTS - style.css */

/* 全局重置与基础变量 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --brand-primary: #1a237e;
  --brand-secondary: #0d47a1;
  --brand-accent: #ff6f00;
  --bg-light: #f5f7fa;
  --bg-dark: #121212;
  --text-light: #333;
  --text-dark: #e0e0e0;
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.3);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --radius: 16px;
  --transition: 0.3s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-light);
  color: var(--text-light);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

body.dark {
  background: var(--bg-dark);
  color: var(--text-dark);
}

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

a:hover {
  color: var(--brand-accent);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 毛玻璃效果 */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* 卡片样式 */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}

body.dark .card {
  background: #1e1e1e;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 30px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  color: #fff;
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 24px rgba(26, 35, 126, 0.3);
}

.btn-accent {
  background: var(--brand-accent);
  color: #fff;
}

.btn-accent:hover {
  background: #e65100;
}

/* 标题样式 */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--brand-accent);
  margin-top: 8px;
  border-radius: 2px;
}

/* 网格布局 */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* 滚动动画 */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Header */
header {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}

.logo span {
  color: var(--brand-accent);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 24px;
}

nav ul li a {
  color: #fff;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-accent);
  transition: width var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  nav ul {
    display: none;
    flex-direction: column;
    background: var(--brand-primary);
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: 20px;
    gap: 16px;
  }

  nav ul.open {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }
}

/* Hero 区域 */
.hero {
  padding: 80px 0;
  background: linear-gradient(135deg, #e8eaf6, #c5cae9);
  text-align: center;
  position: relative;
  overflow: hidden;
}

body.dark .hero {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--brand-primary);
}

body.dark .hero h1 {
  color: #fff;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 32px;
  opacity: 0.9;
}

.hero .btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Banner 滑块 */
.banner-slider {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 40px auto 0;
  overflow: hidden;
  border-radius: var(--radius);
}

.banner-slide {
  display: none;
  padding: 60px 40px;
  background: linear-gradient(135deg, var(--brand-primary), #283593);
  color: #fff;
  border-radius: var(--radius);
  min-height: 300px;
}

.banner-slide.active {
  display: block;
}

.banner-slide h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.banner-dots {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
}

.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ccc;
  cursor: pointer;
  transition: background var(--transition);
}

.banner-dot.active {
  background: var(--brand-accent);
}

/* 通用 Section */
section {
  padding: 60px 0;
}

/* 企业介绍 */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

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

/* 数据统计 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-item {
  padding: 24px;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--brand-primary);
}

body.dark .stat-number {
  color: var(--brand-accent);
}

/* 产品卡片 */
.product-card {
  text-align: center;
}

.product-card svg {
  width: 80px;
  height: 80px;
  margin-bottom: 16px;
}

/* 团队网格 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.team-member {
  text-align: center;
}

.team-member svg {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin-bottom: 12px;
}

/* 客户评价 */
.testimonial-card {
  background: #fff;
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

body.dark .testimonial-card {
  background: #2a2a2a;
}

/* FAQ 手风琴 */
.faq-item {
  margin-bottom: 12px;
  border: 1px solid #e0e0e0;
  border-radius: var(--radius);
  overflow: hidden;
}

body.dark .faq-item {
  border-color: #444;
}

.faq-question {
  padding: 16px 24px;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f9f9f9;
}

body.dark .faq-question {
  background: #2a2a2a;
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 16px 24px;
}

/* Footer */
.footer {
  background: var(--brand-primary);
  color: #fff;
  padding: 40px 0;
}

.footer a {
  color: #b0bec5;
}

.footer a:hover {
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}

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

/* 返回顶部 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--brand-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  border: none;
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--brand-secondary);
  transform: scale(1.1);
}

/* 搜索框 */
.search-box {
  display: flex;
  gap: 8px;
  max-width: 400px;
  margin: 0 auto;
}

.search-box input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid #ddd;
  border-radius: 30px;
  font-size: 1rem;
  outline: none;
  transition: border var(--transition);
}

.search-box input:focus {
  border-color: var(--brand-primary);
}

body.dark .search-box input {
  background: #333;
  border-color: #555;
  color: #fff;
}

/* 暗色模式切换按钮 */
.dark-mode-toggle {
  background: none;
  border: 2px solid #fff;
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition);
}

.dark-mode-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* 新闻列表 */
.news-list {
  display: grid;
  gap: 20px;
}

.news-item {
  padding: 16px;
  border-bottom: 1px solid #eee;
}

body.dark .news-item {
  border-color: #333;
}

/* 合作伙伴 */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
}

.partner-logos svg {
  width: 120px;
  height: 60px;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.partner-logos svg:hover {
  opacity: 1;
}

/* 相关链接 */
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links a {
  background: #e0e0e0;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
}

body.dark .related-links a {
  background: #333;
  color: #ddd;
}

/* 友情链接 */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.friend-links a {
  color: #666;
  font-size: 0.9rem;
}

body.dark .friend-links a {
  color: #aaa;
}

/* 网站地图 */
.sitemap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

.sitemap a {
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
}