/* 球速体育 - 完整内联样式表 */
:root {
  --primary: #6c63ff;
  --secondary: #ff6584;
  --accent: #00d4aa;
  --bg-dark: #0f0f1a;
  --bg-card: rgba(255,255,255,0.06);
  --bg-glass: rgba(255,255,255,0.08);
  --text-primary: #f0f0f5;
  --text-secondary: #b0b0c0;
  --text-muted: #7a7a8a;
  --border-glass: rgba(255,255,255,0.12);
  --shadow-glow: 0 8px 32px rgba(108,99,255,0.15);
  --radius-card: 20px;
  --radius-btn: 50px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 10px;
}

/* 通用动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(108,99,255,0.3); }
  50% { box-shadow: 0 0 40px rgba(108,99,255,0.6); }
}

/* 滚动触发动画 */
section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 通用卡片毛玻璃效果 */
.glass-card, section, article, details {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 2rem;
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

.glass-card:hover, section:hover, article:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(108,99,255,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

/* 渐变Banner - Hero */
#hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 30%, #0f3460 60%, #533483 100%);
  background-size: 300% 300%;
  animation: gradientShift 10s ease infinite;
  border: none;
  border-radius: 0;
  padding: 6rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  opacity: 1;
  transform: none;
}

#hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(108,99,255,0.08) 0%, transparent 60%);
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

#hero h1 {
  font-size: clamp(2rem, 6vw, 3.8rem);
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, #c0bfff 50%, #ff6584 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.2rem;
  animation: fadeInUp 0.8s ease;
}

#hero p {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2.5rem;
  animation: fadeInUp 1s ease 0.2s both;
}

#hero a {
  display: inline-block;
  padding: 0.9rem 2.5rem;
  border-radius: var(--radius-btn);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  margin: 0.5rem;
  animation: fadeInUp 1s ease 0.4s both;
}

#hero a:first-of-type {
  background: linear-gradient(135deg, var(--primary), #8b7aff);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}

#hero a:first-of-type:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 30px rgba(108,99,255,0.6);
}

#hero a:last-of-type {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.3);
  color: #fff;
}

#hero a:last-of-type:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  transform: translateY(-3px);
}

/* 导航 */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(15,15,26,0.85);
  border-bottom: 1px solid var(--border-glass);
  padding: 0.8rem 2rem;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
}

nav > a {
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border-radius: 50px;
  font-size: 0.9rem;
  transition: var(--transition);
  white-space: nowrap;
}

nav ul li a:hover {
  color: #fff;
  background: rgba(108,99,255,0.2);
  transform: translateY(-2px);
}

/* 主内容 */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* 通用标题 */
h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  margin-top: 0.5rem;
}

h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1rem;
}

ul, ol {
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.6rem;
}

/* 产品卡片 */
#products article {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 1.8rem;
  transition: var(--transition);
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
}

#products article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}

#products article:hover::before {
  opacity: 1;
}

#products article:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(108,99,255,0.2);
  border-color: rgba(108,99,255,0.3);
}

/* 用户反馈块 */
blockquote {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(108,99,255,0.08);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  padding: 1.2rem 1.8rem;
  margin: 1.2rem 0;
  transition: var(--transition);
}

blockquote:hover {
  background: rgba(108,99,255,0.15);
  transform: translateX(6px);
}

blockquote p {
  font-style: italic;
  color: var(--text-primary);
  margin: 0;
}

/* FAQ details */
details {
  cursor: pointer;
  padding: 1.2rem 1.8rem;
  margin-bottom: 0.8rem;
  transition: var(--transition);
}

details:hover {
  background: rgba(255,255,255,0.1);
}

details summary {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

details summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  transition: var(--transition);
  font-weight: 300;
}

details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

details p {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-glass);
}

/* 知识中心文章 */
#knowledge-center article {
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: var(--bg-card);
}

#knowledge-center ul li a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

#knowledge-center ul li a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 使用指南 */
#howto ol li {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition);
}

#howto ol li:hover {
  padding-left: 0.8rem;
  color: var(--text-primary);
}

#howto ol li strong {
  color: var(--accent);
}

/* 联系方式 */
#contact ul li {
  padding: 0.4rem 0;
}

/* 返回顶部 */
a[href="#"] {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: linear-gradient(135deg, var(--primary), #8b7aff);
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.4rem;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
  transition: var(--transition);
  z-index: 999;
  opacity: 0.9;
}

a[href="#"]:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 8px 30px rgba(108,99,255,0.6);
  opacity: 1;
  animation: pulseGlow 2s infinite;
}

/* Footer */
footer {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(15,15,26,0.9);
  border-top: 1px solid var(--border-glass);
  padding: 2.5rem 2rem;
  text-align: center;
  margin-top: 3rem;
}

footer nav ul {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
}

footer nav ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
}

footer nav ul li a:hover {
  color: var(--primary);
}

footer p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0.3rem 0;
}

/* 响应式设计 - 手机适配 */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  header {
    padding: 0.6rem 1rem;
  }

  nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  nav ul {
    gap: 0.3rem;
  }

  nav ul li a {
    font-size: 0.8rem;
    padding: 0.3rem 0.6rem;
  }

  #hero {
    padding: 4rem 1.2rem;
  }

  #hero a {
    padding: 0.7rem 1.8rem;
    font-size: 0.9rem;
    display: block;
    width: 80%;
    margin: 0.5rem auto;
  }

  main {
    padding: 1.5rem 1rem;
  }

  .glass-card, section, article, details {
    padding: 1.2rem;
    margin-bottom: 1rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.1rem;
  }

  a[href="#"] {
    width: 44px;
    height: 44px;
    bottom: 1.2rem;
    right: 1.2rem;
    font-size: 1.2rem;
  }

  footer {
    padding: 1.8rem 1rem;
  }

  footer nav ul {
    flex-wrap: wrap;
    gap: 0.8rem;
  }
}

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

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

  nav ul li a {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
  }
}

/* 暗色模式已默认，同时支持系统偏好增强 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-dark: #0a0a14;
    --bg-card: rgba(255,255,255,0.05);
    --bg-glass: rgba(255,255,255,0.06);
  }
}

/* 打印样式 */
@media print {
  header, a[href="#"], footer {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  section {
    opacity: 1;
    transform: none;
    break-inside: avoid;
  }
}