/* ===== 宝威体育 (中国)官方网站 - Baowei Sports ===== */
/* ===== 全局变量 & 重置 ===== */
:root {
  --primary: #1a2a6c;
  --secondary: #2c3e8c;
  --accent: #f39c12;
  --bg: #f0f4ff;
  --text: #1a1a2e;
  --glass: rgba(255, 255, 255, 0.25);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --radius: 20px;
  --transition: 0.3s ease;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

.dark {
  --bg: #0d1117;
  --text: #e6edf3;
  --glass: rgba(30, 30, 50, 0.6);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ===== 容器 ===== */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 毛玻璃 ===== */
.glass {
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-size: 1rem;
  text-align: center;
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(26, 42, 108, 0.35);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

/* ===== 通用区块 ===== */
.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-sub {
  font-size: 1.1rem;
  color: var(--text);
  opacity: 0.8;
  max-width: 680px;
  margin: 0 auto 48px;
}

/* ===== 网格 ===== */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

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

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

/* ===== 卡片 ===== */
.card {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.12);
}

/* ===== 工具类 ===== */
.text-center {
  text-align: center;
}

.mt-24 {
  margin-top: 24px;
}

.mb-24 {
  margin-bottom: 24px;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.gap-12 {
  gap: 12px;
}

.gap-24 {
  gap: 24px;
}

.flex-wrap {
  flex-wrap: wrap;
}

/* ===== 页眉 ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, #fff, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 0;
  position: relative;
  color: var(--text);
  transition: color var(--transition);
}

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

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

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.hamburger span {
  width: 28px;
  height: 3px;
  background: var(--text);
  border-radius: 4px;
  transition: all var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg);
  padding: 24px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
  z-index: 999;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 1.1rem;
  border-bottom: 1px solid rgba(128, 128, 128, 0.15);
}

/* ===== Banner ===== */
.banner {
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  padding-top: 72px;
}

.banner-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 50%, rgba(26, 42, 108, 0.5), transparent 60%),
              radial-gradient(circle at 80% 30%, rgba(243, 156, 18, 0.25), transparent 50%);
  z-index: 0;
}

.banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  padding: 40px 24px;
}

.banner h1 {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  color: #fff;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.banner p {
  font-size: 1.3rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.banner .btn-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-12px);
  }
  60% {
    transform: translateX(-50%) translateY(-6px);
  }
}

/* ===== 统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.stat-item {
  text-align: center;
  padding: 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--accent);
}

.stat-label {
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8px;
  font-size: 1rem;
}

/* ===== 关于我们 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-svg {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: block;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #1a2a6c, #2c3e8c);
  padding: 20px;
}

/* ===== 产品 ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.product-card {
  text-align: center;
  padding: 28px 20px;
}

.product-card svg {
  width: 80px;
  height: 80px;
  margin-bottom: 16px;
  border-radius: 16px;
  padding: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.product-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.product-card p {
  font-size: 0.95rem;
  opacity: 0.8;
}

/* ===== 服务 ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.service-card {
  padding: 28px 20px;
  text-align: center;
}

.service-card svg {
  width: 56px;
  height: 56px;
  margin-bottom: 12px;
}

/* ===== 新闻 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.news-card {
  padding: 24px;
}

.news-card .date {
  font-size: 0.85rem;
  opacity: 0.6;
  margin-bottom: 8px;
}

.news-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.news-card p {
  font-size: 0.95rem;
  opacity: 0.8;
  margin-bottom: 16px;
}

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid rgba(128, 128, 128, 0.2);
  padding: 16px 0;
  cursor: pointer;
}

.faq-question {
  font-weight: 600;
  font-size: 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  transition: transform var(--transition);
}

.faq-item.active .faq-question::after {
  content: '−';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding-top: 0;
  opacity: 0;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-top: 12px;
  opacity: 1;
}

/* ===== HowTo ===== */
.howto-steps {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.howto-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 20px;
  background: var(--glass);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.howto-step .step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}

/* ===== 客户评价 ===== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.testimonial-card {
  padding: 28px;
  position: relative;
}

.testimonial-card::before {
  content: '"';
  font-size: 4rem;
  position: absolute;
  top: 4px;
  left: 16px;
  opacity: 0.15;
  color: var(--primary);
  font-family: serif;
}

.testimonial-card p {
  font-style: italic;
  margin-bottom: 16px;
}

.testimonial-card .author {
  font-weight: 600;
}

/* ===== 品牌故事 ===== */
.brand-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.brand-story svg {
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius);
}

/* ===== 团队 ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 28px;
}

.team-card {
  text-align: center;
  padding: 24px;
}

.team-card svg {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  padding: 8px;
}

.team-card h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.team-card p {
  font-size: 0.9rem;
  opacity: 0.7;
}

/* ===== 客户标志 ===== */
.client-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
  align-items: center;
  padding: 24px 0;
}

.client-logos svg {
  width: 120px;
  height: 60px;
  opacity: 0.5;
  transition: opacity var(--transition);
}

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

/* ===== 联系 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info p {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.contact-info svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--primary);
  color: rgba(255, 255, 255, 0.85);
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}

.footer h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  opacity: 0.8;
}

.qrcode {
  width: 100px;
  height: 100px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 8px;
  flex-direction: column;
  gap: 4px;
}

.qrcode svg {
  width: 60px;
  height: 60px;
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  transition: all var(--transition);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  background: var(--accent);
}

/* ===== 暗黑模式切换 ===== */
.dark-toggle {
  background: none;
  border: 2px solid var(--text);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  font-size: 1.2rem;
  transition: all var(--transition);
}

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

/* ===== 搜索框 ===== */
.search-box {
  display: flex;
  gap: 8px;
  max-width: 400px;
  margin: 0 auto 40px;
}

.search-box input {
  flex: 1;
  padding: 12px 20px;
  border-radius: 50px;
  border: 1px solid rgba(128, 128, 128, 0.3);
  background: var(--glass);
  backdrop-filter: blur(8px);
  color: var(--text);
  font-size: 1rem;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-box button {
  padding: 12px 28px;
  border-radius: 50px;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

/* ===== 文章列表 ===== */
.article-list {
  display: grid;
  gap: 32px;
}

.article-item {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.article-item h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.article-item .meta {
  font-size: 0.85rem;
  opacity: 0.6;
  margin-bottom: 8px;
}

.article-item p {
  margin-bottom: 16px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 0.9rem;
  padding: 12px 0;
  opacity: 0.7;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .grid-2,
  .about-grid,
  .brand-story,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }

  .grid-4,
  .footer-grid,
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .banner h1 {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .footer-grid,
  .stats-grid,
  .client-logos {
    grid-template-columns: 1fr;
  }

  .banner h1 {
    font-size: 2.2rem;
  }

  .banner p {
    font-size: 1.1rem;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .banner h1 {
    font-size: 1.8rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 16px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }
}