/* =========================================
   1. 初始化与重置 (Reset & Base)
   ========================================= */
* {
    box-sizing: border-box; /* 让padding和border不增加元素宽度 */
    outline: none;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 14px;
    color: #333;
    background-color: #f9f9f9; /* 全局背景色，稍微带点灰，突出白色内容块 */
    line-height: 1.6;
}

/* 链接样式 */
a { text-decoration: none; color: #333; transition: color 0.3s ease; }
a:hover { color: #1ca4e5; }

/* 列表样式 */
ul, ol { list-style: none; margin: 0; padding: 0; }

/* 图片 */
img { max-width: 100%; height: auto; border: 0; vertical-align: middle; }

/* 标题 */
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: normal; }

/* 表单元素 */
input, button, textarea, select {
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
}

/* =========================================
   2. 通用工具类 (Utilities)
   ========================================= */
.container {
    width: 1200px; /* 标准PC端宽度 */
    margin: 0 auto;
    padding: 0 15px; /* 防止在小屏幕贴边 */
}

.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.p-20 { padding: 20px; }

/* 主题色文字 */
.text-primary { color: #1ca4e5; }
.text-danger { color: #ff5722; }

/* =========================================
   3. 头部导航 (Header & Nav)
   ========================================= */
.header-wrapper {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo h1 {
    margin: 0;
    font-size: 28px;
    color: #1ca4e5;
    font-weight: bold;
    letter-spacing: 1px;
}

/* 头部搜索 */
.header-search { display: flex; }
.header-search input {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-right: none;
    border-radius: 4px 0 0 4px;
    width: 200px;
}
.header-search button {
    padding: 8px 15px;
    background: #1ca4e5;
    color: #fff;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}
.header-search button:hover { background: #1890ff; }

/* 主导航 */
.navbar { background: #333; }
.nav-list { display: flex; }
.nav-list li a {
    display: block;
    padding: 15px 25px;
    color: #fff;
    font-size: 16px;
    transition: background 0.3s;
}
.nav-list li a:hover,
.nav-list li a.active { background: #1ca4e5; }

.nav-phone {
    color: #ff5722;
    font-size: 18px;
    font-weight: bold;
    padding-left: 20px;
    border-left: 1px solid #444;
}

/* =========================================
   4. 面包屑导航 (Breadcrumb)
   ========================================= */
.breadcrumb {
    padding: 15px 0;
    color: #666;
    font-size: 12px;
}
.breadcrumb a { color: #666; }
.breadcrumb a:hover { color: #1ca4e5; }

/* =========================================
   5. 按钮样式 (Buttons)
   ========================================= */
.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 4px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
}

.btn-primary {
    background: #1ca4e5;
    color: #fff;
}
.btn-primary:hover {
    background: #1890ff;
    color: #fff;
}

.btn-danger {
    background: #ff5722;
    color: #fff;
}
.btn-danger:hover {
    background: #fa4510;
    color: #fff;
}

.btn-outline {
    border: 1px solid #ddd;
    background: #fff;
    color: #666;
}
.btn-outline:hover {
    border-color: #1ca4e5;
    color: #1ca4e5;
}

/* =========================================
   6. 分页样式 (Pagination)
   ========================================= */
.pagebar {
    margin-top: 40px;
    text-align: center;
    padding-bottom: 20px;
}
.pagebar a {
    display: inline-block;
    padding: 8px 16px;
    margin: 0 4px;
    border: 1px solid #ddd;
    color: #666;
    border-radius: 4px;
    background: #fff;
}
.pagebar a:hover,
.pagebar a.active {
    background: #1ca4e5;
    color: #fff;
    border-color: #1ca4e5;
}

/* =========================================
   7. 底部版权 (Footer)
   ========================================= */
.footer {
    background: #222;
    color: #999;
    padding: 60px 0 20px;
    margin-top: 50px;
}

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

.footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #333;
}

.footer-col p { margin-bottom: 10px; font-size: 13px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: #999; }
.footer-col ul li a:hover { color: #1ca4e5; padding-left: 5px; }

.copyright {
    text-align: center;
    border-top: 1px solid #333;
    padding-top: 20px;
    font-size: 12px;
    color: #666;
}

/* =========================================
   8. 响应式适配 (Responsive)
   ========================================= */
@media (max-width: 1200px) {
    .container { width: 100%; padding: 0 20px; }
}

@media (max-width: 768px) {
    /* 移动端头部调整 */
    .header-inner { flex-direction: column; gap: 15px; }
    .header-search { width: 100%; }
    .header-search input { width: 100%; border-radius: 4px; border: 1px solid #ddd; }
    .header-search button { display: none; } /* 移动端可隐藏搜索按钮或用图标代替 */
    
    /* 导航栏折叠（简单版） */
    .navbar { display: none; } /* 实际开发需配合JS做汉堡菜单 */
    
    /* 底部堆叠 */
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer-col ul li a:hover { padding-left: 0; }
}