/* 满冠体育官方网站 - 完整样式表 */
/* 版本: 1.0 | 日期: 2025-03-20 */

/* ===== CSS Variables & Theme ===== */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --primary-dark: #0f2440;
  --accent: #e8a838;
  --accent-light: #f0c060;
  --accent-glow: rgba(232, 168, 56, 0.4);
  --bg: #f5f7fa;
  --text: #1a1a2e;
  --text-light: #4a4a6a;
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 36px rgba(0, 0, 0, 0.12);
  --shadow-btn: 0 8px 24px rgba(232, 168, 56, 0.4);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --radius-full: 50px;
  --glass: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-blur: 12px;
  --transition: 0.3s ease;
  --transition-fast: 0.2s ease;
  --transition-slow: 0.5s ease;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 60px;
}

/* Dark Mode */
.dark-mode {
  --primary: #2a5a8c;
  --primary-light: #4a7aac;
  --primary-dark: #1a3a5c;
  --accent: #d4a030;
  --accent-light: #e8b850;
  --accent-glow: rgba(212, 160, 48, 0.4);
  --bg: #0f1a2e;
  --text: #e0e4f0;
  --text-light: #a0a8c0;
  --white: #1a2a3e;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 12px 36px rgba(0, 0, 0, 0.4);
  --glass: rgba(26, 42, 62, 0.8);
  --glass-border: rgba(255, 255, 255, 0.1);
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

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;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button {
  cursor: pointer;
  font-family: inherit;
}

input,
button,
textarea,
select {
  font: inherit;
}

/* ===== Utility ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== Header ===== */
header {
  background: var(--glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), border-color var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  flex-wrap: wrap;
  min-height: var(--header-height);
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  transition: color var(--transition);
  user-select: none;
}

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

nav {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  font-weight: 500;
  color: var(--text);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
  position: relative;
}

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

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

nav a:hover,
nav a.active {
  color: var(--primary);
}

.dark-toggle {
  background: var(--primary);
  color: var(--white);
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background var(--transition), transform var(--transition-fast);
  white-space: nowrap;
}

.dark-toggle:hover {
  background: var(--primary-light);
  transform: scale(1.05);
}

.dark-toggle:active {
  transform: scale(0.95);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--text);
  cursor: pointer;
  padding: 4px;
  transition: color var(--transition);
}

.menu-toggle:hover {
  color: var(--accent);
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
  color: var(--white);
  padding: 80px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(232, 168, 56, 0.15) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes heroGlow {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  animation: fadeInUp 0.8s ease;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 30px;
  opacity: 0.9;
  animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1.2s ease;
}

/* ===== Buttons ===== */
.btn {
  padding: 14px 36px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-block;
  text-align: center;
  line-height: 1.2;
}

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

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-outline:hover {
  background: var(--white);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-outline:active {
  transform: translateY(0);
}

.dark-mode .btn-outline {
  border-color: var(--accent);
  color: var(--accent);
}

.dark-mode .btn-outline:hover {
  background: var(--accent);
  color: var(--primary-dark);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--text-light);
}

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

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

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

.search-box input {
  flex: 1;
  padding: 12px 20px;
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-full);
  background: var(--white);
  color: var(--text);
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 168, 56, 0.2);
}

.search-box input::placeholder {
  color: var(--text-light);
  opacity: 0.7;
}

.search-box button {
  padding: 12px 24px;
  background: var(--accent);
  color: var(--primary-dark);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition-fast);
}

.search-box button:hover {
  background: var(--accent-light);
  transform: scale(1.05);
}

.search-box button:active {
  transform: scale(0.95);
}

/* ===== Banner Carousel ===== */
.banner-carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  margin: 40px 0;
  box-shadow: var(--shadow);
}

.banner-slides {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.banner-slide {
  min-width: 100%;
  padding: 60px 40px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: var(--white);
  text-align: center;
}

.banner-slide h3 {
  font-size: 1.8rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.banner-slide p {
  font-size: 1rem;
  opacity: 0.9;
}

.banner-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
}

.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-light);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition-fast);
  padding: 0;
}

.banner-dot:hover {
  transform: scale(1.3);
}

.banner-dot.active {
  background: var(--accent);
  transform: scale(1.2);
}

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

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--primary);
  transition: color var(--transition);
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 40px;
  font-size: 1.1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Grids ===== */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 20px;
}

/* ===== Cards ===== */
.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--glass-border);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.card-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
  border-radius: var(--radius-sm);
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--primary);
  transition: color var(--transition);
}

.card p {
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== Glassmorphism Card ===== */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* ===== Stats Section ===== */
.stats {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  padding: 60px 0;
}

.stat-item {
  text-align: center;
  padding: 16px;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.8;
  margin-top: 8px;
}

/* ===== FAQ Accordion ===== */
.faq-item {
  border-bottom: 1px solid var(--glass-border);
  padding: 16px 0;
  transition: border-color var(--transition);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--primary);
  padding: 4px 0;
  user-select: none;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-question::after {
  content: '+';
  font-size: 1.6rem;
  transition: transform var(--transition);
  line-height: 1;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 16px;
  color: var(--text-light);
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 12px 16px;
}

/* ===== HowTo Steps ===== */
.howto-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.step-number {
  background: var(--accent);
  color: var(--primary-dark);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.howto-step:hover .step-number {
  transform: scale(1.1);
}

/* ===== Footer ===== */
footer {
  background: var(--primary-dark);
  color: var(--white);
  padding: 60px 0 30px;
}

footer a {
  color: var(--accent-light);
  transition: color var(--transition);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-grid h4 {
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.footer-grid p {
  margin-bottom: 8px;
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ===== Scroll Animation ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Back to Top Button ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--primary-dark);
  border: none;
  border-radius: 50%;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.back-to-top:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-hover);
}

.back-to-top:active {
  transform: scale(0.95);
}

/* ===== Responsive Design ===== */

/* Tablet Landscape (1024px and below) */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
  .hero h1 {
    font-size: 2.4rem;
  }
}

/* Tablet Portrait & Mobile (768px and below) */
@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 60px 0 80px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 12px;
    padding: 16px 0;
    border-top: 1px solid var(--glass-border);
    margin-top: 12px;
  }

  nav.open {
    display: flex;
  }

  nav a {
    padding: 8px 0;
    width: 100%;
    text-align: center;
  }

  .menu-toggle {
    display: block;
  }

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

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

  .section-title {
    font-size: 1.6rem;
  }

  .banner-slide {
    padding: 40px 20px;
  }

  .banner-slide h3 {
    font-size: 1.4rem;
  }

  .stat-number {
    font-size: 2.2rem;
  }

  .search-box {
    max-width: 100%;
    flex-direction: column;
  }

  .search-box input {
    width: 100%;
  }

  .search-box button {
    width: 100%;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .card {
    padding: 20px;
  }

  section {
    padding: 40px 0;
  }

  .howto-step {
    flex-direction: column;
    gap: 12px;
  }
}

/* Small Mobile (480px and below) */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .logo {
    font-size: 1.3rem;
  }

  .btn {
    padding: 12px 28px;
    font-size: 0.9rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .banner-slide h3 {
    font-size: 1.2rem;
  }

  .banner-slide p {
    font-size: 0.9rem;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .card h3 {
    font-size: 1.1rem;
  }

  .footer-grid {
    gap: 20px;
  }

  .footer-grid h4 {
    font-size: 1rem;
  }
}

/* ===== Dark Mode Specific Overrides ===== */
.dark-mode .card {
  background: var(--white);
  border-color: rgba(255, 255, 255, 0.05);
}

.dark-mode header {
  background: var(--glass);
  border-bottom-color: rgba(255, 255, 255, 0.05);
}

.dark-mode .btn-outline {
  border-color: var(--accent);
  color: var(--accent);
}

.dark-mode .btn-outline:hover {
  background: var(--accent);
  color: var(--primary-dark);
}

.dark-mode .search-box input {
  background: var(--white);
  border-color: rgba(255, 255, 255, 0.1);
}

.dark-mode .search-box input:focus {
  border-color: var(--accent);
}

.dark-mode .glass-card {
  background: rgba(26, 42, 62, 0.6);
}

.dark-mode .faq-item {
  border-color: rgba(255, 255, 255, 0.05);
}

.dark-mode .banner-carousel {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* ===== Print Styles ===== */
@media print {
  header,
  .back-to-top,
  .search-box,
  .banner-carousel,
  .dark-toggle,
  .menu-toggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .card,
  .glass-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .hero {
    padding: 40px 0;
    background: #1a3a5c !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  a {
    color: #1a3a5c !important;
  }

  .btn {
    border: 1px solid #000;
  }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-up {
    opacity: 1;
    transform: none;
  }

  .back-to-top {
    transition: none;
  }
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Selection styling */
::selection {
  background: var(--accent);
  color: var(--primary-dark);
}

/* Smooth scrollbar for webkit */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Dark mode scrollbar */
.dark-mode ::-webkit-scrollbar-track {
  background: var(--bg);
}

.dark-mode ::-webkit-scrollbar-thumb {
  background: var(--primary-light);
}