/* common.css — 全站公共样式 (MK体育在线登录-MK（中国）) */
/* 配色方案：T薰衣草紫系列 */

/* ===== CSS变量定义 ===== */
:root {
  --color-primary: #F3E5F5;
  --color-secondary: #9575CD;
  --color-dark: #2E1A47;
  --color-text-main: #1A1A1A;
  --color-text-secondary: #4A4A4A;
  --color-border: #D1C4E9;
  --color-white: #FFFFFF;
  --color-light-bg: #FAF7FD;
  --font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
  --transition: all 0.3s ease;
}

/* ===== 重置样式 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-family);
  color: var(--color-text-main);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: var(--color-secondary); transition: var(--transition); }
a:hover { color: var(--color-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; font-family: inherit; }
input, textarea { font-family: inherit; outline: none; }

/* ===== 容器 ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-title {
  font-size: 2rem; font-weight: 600; text-align: center;
  margin-bottom: 40px; color: var(--color-dark); position: relative;
}
.section-title::after {
  content: ""; display: block; width: 60px; height: 3px;
  background: var(--color-secondary); margin: 12px auto 0; border-radius: 2px;
}

/* ===== N5胶囊导航 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border); height: var(--nav-height);
  transition: var(--transition);
}
.navbar .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.5rem; font-weight: 700; color: var(--color-dark);
}
.logo-icon {
  width: 40px; height: 40px; background: var(--color-secondary);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  color: var(--color-white); font-size: 1.2rem; font-weight: 800;
}
.nav-links { display: flex; gap: 8px; }
.nav-links a {
  padding: 8px 20px; border-radius: 24px; font-size: 0.95rem;
  color: var(--color-text-secondary); font-weight: 500;
  border: 1px solid transparent; transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  background: var(--color-secondary); color: var(--color-white);
  border-color: var(--color-secondary);
}

/* ===== 汉堡菜单 ===== */
.hamburger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  padding: 5px; z-index: 1001;
}
.hamburger span {
  display: block; width: 25px; height: 2px;
  background: var(--color-dark); transition: var(--transition);
}

/* ===== 面包屑导航 ===== */
.breadcrumb {
  background: var(--color-light-bg); padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb .container { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-secondary); }
.breadcrumb .sep { color: var(--color-border); }
.breadcrumb .current { color: var(--color-dark); font-weight: 500; }

/* ===== B4按钮样式（阴影悬浮） ===== */
.btn {
  display: inline-block; padding: 14px 36px; border-radius: 30px;
  font-size: 1rem; font-weight: 500; cursor: pointer; transition: var(--transition);
  border: none; text-align: center;
}
.btn-primary {
  background: var(--color-secondary); color: var(--color-white);
  box-shadow: 0 4px 15px rgba(149,117,205,0.35);
}
.btn-primary:hover {
  background: var(--color-dark); color: var(--color-white);
  transform: translateY(-2px); box-shadow: 0 8px 25px rgba(149,117,205,0.45);
}
.btn-outline {
  background: transparent; color: var(--color-secondary);
  border: 2px solid var(--color-secondary);
}
.btn-outline:hover { background: var(--color-secondary); color: var(--color-white); }

/* ===== Footer ===== */
.footer {
  background: var(--color-dark); color: rgba(255,255,255,0.8); padding: 60px 0 20px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px;
}
.footer-col h4 {
  color: var(--color-white); font-size: 1.1rem; margin-bottom: 20px;
  position: relative; padding-bottom: 10px;
}
.footer-col h4::after {
  content: ""; position: absolute; bottom: 0; left: 0;
  width: 30px; height: 2px; background: var(--color-secondary);
}
.footer-col p, .footer-col li { font-size: 0.9rem; line-height: 2; }
.footer-col a { color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer-col a:hover { color: var(--color-primary); padding-left: 4px; }
.footer-col ul li { padding: 4px 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem;
}
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: var(--color-primary); }

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed; bottom: 40px; right: 40px; z-index: 999;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-secondary); color: var(--color-white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; cursor: pointer; opacity: 0; visibility: hidden;
  transition: var(--transition); box-shadow: 0 4px 15px rgba(149,117,205,0.4);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-dark); transform: translateY(-3px); }

/* ===== 搜索框 ===== */
.search-box {
  display: flex; max-width: 500px; margin: 0 auto;
  border: 2px solid var(--color-border); border-radius: 30px; overflow: hidden;
  background: var(--color-white); transition: var(--transition);
}
.search-box:focus-within { border-color: var(--color-secondary); }
.search-box input {
  flex: 1; padding: 12px 20px; border: none; font-size: 0.95rem;
}
.search-box button {
  padding: 12px 24px; background: var(--color-secondary);
  color: var(--color-white); font-size: 0.9rem; font-weight: 500;
}
.search-box button:hover { background: var(--color-dark); }

/* ===== 通用卡片 ===== */
.card {
  background: var(--color-white); border: 1px solid var(--color-border);
  border-radius: 16px; padding: 24px; transition: var(--transition);
}
.card:hover {
  border-color: var(--color-secondary);
  box-shadow: 0 8px 30px rgba(149,117,205,0.12);
  transform: translateY(-4px);
}

/* ===== 分页 ===== */
.pagination {
  display: flex; justify-content: center; gap: 8px; margin-top: 40px;
}
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; border-radius: 8px;
  border: 1px solid var(--color-border); font-size: 0.9rem;
  color: var(--color-text-secondary); transition: var(--transition);
}
.pagination a:hover { background: var(--color-secondary); color: var(--color-white); border-color: var(--color-secondary); }
.pagination .current { background: var(--color-secondary); color: var(--color-white); border-color: var(--color-secondary); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  :root { --nav-height: 60px; }
  .section { padding: 40px 0; }
  .section-title { font-size: 1.5rem; margin-bottom: 28px; }
  .nav-links {
    position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.98); flex-direction: column;
    align-items: center; justify-content: center; gap: 16px;
    transform: translateX(100%); transition: transform 0.3s ease;
    z-index: 999;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 1.2rem; padding: 12px 32px; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .back-to-top { right: 20px; bottom: 20px; width: 40px; height: 40px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}