/* ============================================================
   style.css – MK体育官方网站
   渐变Banner · 圆角卡片 · 毛玻璃效果 · 响应式 · 暗色模式
   ============================================================ */

/* ---------- CSS 自定义属性 ---------- */
:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #f0c040;
  --accent-dark: #d4a832;
  --bg-light: #f5f7fa;
  --bg-card: rgba(255, 255, 255, 0.85);
  --text: #1e1e2f;
  --text-muted: #555;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  --radius: 16px;
  --glass-bg: rgba(255, 255, 255, 0.3);
  --glass-border: rgba(255, 255, 255, 0.2);
  --nav-bg: rgba(26, 26, 46, 0.85);
  --footer-bg: #0f0f1a;
  --transition: 0.3s ease;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* 暗色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-light: #12121c;
    --bg-card: rgba(30, 30, 50, 0.85);
    --text: #e8e8f0;
    --text-muted: #aaa;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    --glass-bg: rgba(20, 20, 35, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --nav-bg: rgba(10, 10, 20, 0.9);
  }
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font);
  background: var(--bg-light);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

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

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

ul, ol {
  list-style: none;
  padding-left: 0;
}

/* ---------- 滚动动画 (基础) ---------- */
section {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* 延迟动画 */
section:nth-child(1) { animation-delay: 0.1s; }
section:nth-child(2) { animation-delay: 0.2s; }
section:nth-child(3) { animation-delay: 0.3s; }
section:nth-child(4) { animation-delay: 0.4s; }
section:nth-child(5) { animation-delay: 0.5s; }
section:nth-child(6) { animation-delay: 0.6s; }
section:nth-child(7) { animation-delay: 0.7s; }
section:nth-child(8) { animation-delay: 0.8s; }
section:nth-child(9) { animation-delay: 0.9s; }
section:nth-child(10) { animation-delay: 1.0s; }
section:nth-child(11) { animation-delay: 1.1s; }
section:nth-child(12) { animation-delay: 1.2s; }
section:nth-child(13) { animation-delay: 1.3s; }
section:nth-child(14) { animation-delay: 1.4s; }
section:nth-child(15) { animation-delay: 1.5s; }

/* ---------- 导航栏 ---------- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 2rem;
  transition: background var(--transition);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.8rem 0;
}

nav > a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

nav > a span {
  background: linear-gradient(135deg, var(--accent), #e6b800);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav ul {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav ul li a {
  padding: 0.4rem 0.9rem;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

nav ul li a:hover,
nav ul li a:focus {
  background: var(--accent);
  color: var(--primary);
  outline: none;
}

/* ---------- Hero ---------- */
#hero {
  padding: 10rem 2rem 6rem;
  text-align: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 70%, #1a1a2e 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(240, 192, 64, 0.15) 0%, transparent 60%),
              radial-gradient(circle at 70% 80%, rgba(100, 200, 255, 0.1) 0%, transparent 50%);
  animation: heroGlow 12s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(10%, 5%) scale(1.1); }
}

#hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#hero p {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  max-width: 700px;
  margin: 0 auto 2rem;
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

#hero a[role="button"] {
  display: inline-block;
  padding: 0.9rem 2.8rem;
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 50px;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(240, 192, 64, 0.4);
  position: relative;
  z-index: 1;
}

#hero a[role="button"]:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(240, 192, 64, 0.6);
}

/* ---------- 通用 Section ---------- */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

section {
  margin: 4rem 0;
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

section h2 {
  font-size: 1.8rem;
  margin-bottom: 1.2rem;
  color: var(--primary);
  border-left: 5px solid var(--accent);
  padding-left: 1rem;
}

section h3 {
  font-size: 1.3rem;
  margin: 1rem 0 0.5rem;
  color: var(--text);
}

section p {
  margin-bottom: 0.8rem;
  color: var(--text-muted);
}

section ul, section ol {
  padding-left: 1.5rem;
  margin: 0.8rem 0;
}

section li {
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

/* ---------- 卡片样式的 article ---------- */
article {
  background: var(--glass-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  border: 1px solid var(--glass-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

article:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

/* ---------- FAQ details ---------- */
details {
  background: var(--glass-bg);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 10px;
  padding: 0.8rem 1.2rem;
  margin: 0.6rem 0;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: background var(--transition);
}

details[open] {
  background: rgba(240, 192, 64, 0.08);
}

details summary {
  font-weight: 600;
  font-size: 1rem;
  padding: 0.3rem 0;
  outline: none;
}

details p {
  padding: 0.6rem 0 0.2rem;
  margin: 0;
}

/* ---------- Blockquote ---------- */
blockquote {
  background: var(--glass-bg);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.5rem;
  border-radius: 0 12px 12px 0;
  margin: 1rem 0;
  font-style: italic;
}

/* ---------- 侧边栏 ---------- */
aside {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  margin-bottom: 2rem;
  font-weight: 500;
}

/* ---------- 页脚 ---------- */
footer {
  background: var(--footer-bg);
  color: rgba(255, 255, 255, 0.7);
  padding: 2.5rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

footer nav ul {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

footer nav ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

footer p {
  font-size: 0.85rem;
  margin: 0.3rem 0;
}

/* ---------- 内部链接区域 ---------- */
section[aria-labelledby="internal-links-heading"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

section[aria-labelledby="internal-links-heading"] ul li a {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  background: var(--accent);
  color: var(--primary);
  font-weight: 600;
  border-radius: 30px;
  transition: transform var(--transition), box-shadow var(--transition);
}

section[aria-labelledby="internal-links-heading"] ul li a:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(240, 192, 64, 0.4);
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  nav ul {
    gap: 0.3rem;
  }
  nav ul li a {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
  }
  section {
    padding: 1.5rem 1.2rem;
  }
}

@media (max-width: 768px) {
  header {
    padding: 0 1rem;
  }
  nav {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.6rem 0;
  }
  nav ul {
    justify-content: center;
    gap: 0.2rem;
  }
  nav ul li a {
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
  }
  #hero {
    padding: 8rem 1.5rem 4rem;
    min-height: 60vh;
  }
  main {
    padding: 1rem;
  }
  section {
    margin: 2rem 0;
    padding: 1.2rem 1rem;
  }
  section h2 {
    font-size: 1.4rem;
  }
  footer nav ul {
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  nav > a {
    font-size: 1.2rem;
  }
  #hero h1 {
    font-size: 1.8rem;
  }
  #hero p {
    font-size: 0.95rem;
  }
  #hero a[role="button"] {
    padding: 0.7rem 2rem;
    font-size: 0.95rem;
  }
  section h2 {
    font-size: 1.2rem;
  }
  article {
    padding: 1rem;
  }
}

/* ---------- 暗色模式微调 ---------- */
@media (prefers-color-scheme: dark) {
  #hero {
    background: linear-gradient(135deg, #0b0b1a 0%, #12122a 40%, #1a1a3e 70%, #0b0b1a 100%);
  }
  #hero h1 {
    background: linear-gradient(135deg, #f0e6d0 0%, var(--accent) 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  section h2 {
    color: #e0d8c0;
  }
  nav ul li a {
    color: rgba(255, 255, 255, 0.7);
  }
  nav ul li a:hover {
    color: var(--primary);
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  header, footer, aside {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}