/* 
  熊猫体育「中国」官方网站 - 全局样式表
  主色调：墨绿 (#004d40 / #002b24)
  辅助色：金色 (#ffc107) / 亮白 (#ffffff)
  风格：高端、专业、动感、熊猫主题
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
  --primary: #004d40; /* 墨绿 */
  --primary-dark: #002b24;
  --primary-light: #00695c;
  --accent: #ffc107; /* 金色点缀 */
  --text: #333333;
  --text-light: #666666;
  --white: #ffffff;
  --bg-light: #f4f7f6;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', 'Noto Sans SC', sans-serif;
  --shadow: 0 10px 30px rgba(0,0,0,0.1);
  --gradient: linear-gradient(135deg, #004d40 0%, #002b24 100%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  line-height: 1.6;
  background-color: var(--white);
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
  cursor: pointer;
  transition: transform 0.6s ease;
}

img:hover {
  transform: scale(1.05);
}

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

/* Header & Navigation */
header {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 15px rgba(0,0,0,0.3);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 26px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo img {
  height: 45px;
  width: auto;
  border-radius: 50%;
}

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

.nav-links {
  display: flex;
  gap: 35px;
}

.nav-links a {
  font-weight: 500;
  font-size: 16px;
  opacity: 0.85;
  position: relative;
  letter-spacing: 0.5px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: var(--transition);
}

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

.nav-links a:hover, .nav-links a.active {
  opacity: 1;
  color: var(--accent);
}

.mobile-toggle {
  display: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--accent);
}

/* Hero Section */
.hero {
  height: 90vh;
  background: linear-gradient(rgba(0, 43, 36, 0.75), rgba(0, 43, 36, 0.85)), url('https://tse-mm.bing.com/th?q=体育竞技场') no-repeat center center/cover;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--white);
  padding: 0 20px;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 900px;
  z-index: 2;
}

.hero-content h1 {
  font-size: 4.5rem;
  margin-bottom: 25px;
  letter-spacing: 3px;
  text-transform: uppercase;
  text-shadow: 3px 3px 15px rgba(0,0,0,0.4);
  line-height: 1.1;
}

.hero-content p {
  font-size: 1.5rem;
  margin-bottom: 45px;
  opacity: 0.95;
  font-weight: 300;
}

.btn {
  display: inline-block;
  padding: 18px 45px;
  background-color: var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
  border-radius: 50px;
  transition: var(--transition);
  border: 2px solid var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-size: 14px;
}

.btn:hover {
  background-color: transparent;
  color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 15px 25px rgba(0,0,0,0.3);
}

/* Section Styling */
section {
  padding: 120px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 80px;
}

.section-title h2 {
  font-size: 3.2rem;
  color: var(--primary);
  position: relative;
  display: inline-block;
  padding-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 6px;
  background-color: var(--accent);
  border-radius: 3px;
}

.section-title p {
  color: var(--text-light);
  font-size: 1.2rem;
  margin-top: 15px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Intro Section */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.intro-image {
  position: relative;
}

.intro-image img {
  border-radius: 30px;
  box-shadow: var(--shadow);
  width: 100%;
}

.intro-image::before {
  content: '';
  position: absolute;
  top: -30px;
  left: -30px;
  width: 120px;
  height: 120px;
  border-top: 12px solid var(--accent);
  border-left: 12px solid var(--accent);
  border-radius: 30px 0 0 0;
  z-index: -1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-top: 50px;
}

.stat-card {
  background: var(--bg-light);
  padding: 40px;
  border-radius: 20px;
  text-align: center;
  border-bottom: 6px solid var(--primary);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-8px);
  background: var(--white);
  box-shadow: var(--shadow);
}

.stat-card h4 {
  font-size: 38px;
  color: var(--primary);
  margin-bottom: 12px;
  font-weight: 700;
}

.stat-card p {
  font-size: 1.1rem;
  color: var(--text-light);
  font-weight: 500;
}

/* News & Products Grid */
.news-grid, .product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 50px;
}

.card {
  background: var(--white);
  border-radius: 25px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
  transition: var(--transition);
  border: 1px solid #f0f0f0;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-18px);
  box-shadow: 0 25px 50px rgba(0,0,0,0.12);
}

.card-img {
  height: 260px;
  overflow: hidden;
  position: relative;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--accent);
  color: var(--primary-dark);
  padding: 6px 18px;
  border-radius: 25px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.card-body {
  padding: 35px;
  flex-grow: 1;
}

.card-body h3 {
  margin-bottom: 18px;
  font-size: 24px;
  color: var(--primary);
  line-height: 1.3;
}

.card-body p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 25px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: #888;
  padding: 0 35px 35px;
}

/* Dynamics List */
.dynamics-container {
  background: var(--bg-light);
  padding: 60px;
  border-radius: 40px;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.03);
}

.dynamic-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 25px 0;
  border-bottom: 1px solid #e0e0e0;
  transition: var(--transition);
}

.dynamic-item:hover {
  padding-left: 15px;
  background: rgba(0, 77, 64, 0.04);
}

.dynamic-item:last-child {
  border-bottom: none;
}

.dynamic-title {
  font-weight: 600;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 20px;
}

.dynamic-tag {
  background: var(--primary);
  color: var(--white);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.dynamic-date {
  color: var(--text-light);
  font-size: 15px;
  font-family: 'Courier New', Courier, monospace;
}

/* Filters & Search */
.filter-bar {
  background: var(--primary-dark);
  padding: 40px;
  border-radius: 25px;
  margin-bottom: 60px;
  display: flex;
  flex-wrap: wrap;
  gap: 25px;
  align-items: flex-end;
  color: var(--white);
  box-shadow: var(--shadow);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  min-width: 180px;
}

.filter-group label {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.filter-bar select, .filter-bar input {
  padding: 14px 22px;
  border-radius: 12px;
  border: none;
  background: var(--white);
  color: var(--text);
  font-size: 16px;
  width: 100%;
}

.search-box {
  flex: 2;
  min-width: 300px;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 80px;
}

.page-btn {
  width: 55px;
  height: 55px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--primary);
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 700;
  font-size: 18px;
}

.page-btn.active, .page-btn:hover {
  background: var(--primary);
  color: var(--white);
  transform: scale(1.15);
}

/* Contact Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 80px;
}

.contact-form-container {
  background: var(--white);
  padding: 60px;
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 30px;
}

.form-group label {
  display: block;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--primary);
}

.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 16px 22px;
  border: 2px solid #f0f0f0;
  border-radius: 15px;
  font-family: inherit;
  font-size: 17px;
  transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 15px rgba(0, 77, 64, 0.12);
}

.contact-info-card {
  background: var(--primary-dark);
  color: var(--white);
  padding: 60px;
  border-radius: 30px;
  height: fit-content;
  position: sticky;
  top: 120px;
}

.info-item {
  margin-bottom: 40px;
  display: flex;
  gap: 25px;
}

.info-item i {
  color: var(--accent);
  font-size: 28px;
  margin-top: 6px;
}

.info-item strong {
  display: block;
  font-size: 20px;
  margin-bottom: 8px;
  color: var(--accent);
}

.info-item p {
  opacity: 0.9;
  font-size: 16px;
  line-height: 1.5;
}

/* Footer */
footer {
  background: var(--primary-dark);
  color: var(--white);
  padding: 120px 0 50px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.5fr 1.2fr 1.2fr 1.8fr;
  gap: 80px;
  margin-bottom: 80px;
}

.footer-col h4 {
  margin-bottom: 35px;
  color: var(--accent);
  font-size: 22px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.footer-col p {
  font-size: 16px;
  opacity: 0.85;
  line-height: 1.9;
}

.footer-links li {
  margin-bottom: 18px;
}

.footer-links a {
  opacity: 0.75;
  font-size: 16px;
}

.footer-links a:hover {
  opacity: 1;
  color: var(--accent);
  padding-left: 12px;
}

.footer-bottom {
  text-align: center;
  padding-top: 50px;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 15px;
  opacity: 0.6;
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(60px);
  transition: all 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: 50px;
  right: 50px;
  width: 80px;
  height: 80px;
  background: var(--accent);
  color: var(--primary-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 35px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.35);
  cursor: pointer;
  z-index: 999;
  transition: var(--transition);
}

.fab:hover {
  transform: scale(1.15) rotate(15deg);
  background: var(--white);
}

/* Responsive */
@media (max-width: 1200px) {
  .hero-content h1 { font-size: 3.8rem; }
  .footer-grid { gap: 50px; }
}

@media (max-width: 992px) {
  .intro-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-content h1 {
    font-size: 3.2rem;
  }
  
  .contact-info-card {
    position: static;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .news-grid, .product-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-content h1 {
    font-size: 2.8rem;
  }
  
  .section-title h2 {
    font-size: 2.5rem;
  }
}