/* 
 * 乐展智能服务平台 - 统一样式文件
 * 商务专业风格 - 蓝色调
 */

/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-dark: #1e40af;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
}

body {
    font-family: "Microsoft YaHei", "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

/* 头部导航 */
.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: white;
    text-decoration: none;
}

.logo h1 {
    font-size: 22px;
    font-weight: 700;
    margin: 0;
}

.logo h1 a, .logo a {
    color: white;
    text-decoration: none;
}

.logo i {
    font-size: 32px;
    color: #64b5f6;
}

.nav {
    display: flex;
    gap: 8px;
    list-style: none;
}

.nav ul {
    display: flex;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav ul li a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav ul li a:hover {
    background: rgba(255,255,255,0.15);
    color: white;
}

.nav ul li a i {
    font-size: 14px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: rgba(255,255,255,0.15);
    color: white;
}

.nav-link.active {
    background: rgba(100, 181, 246, 0.2);
    color: #64b5f6;
}

/* 主要内容区域 */
.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 40px;
}

.main .container {
    background: white;
    border-radius: 12px;
    padding: 60px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.main h1 {
    font-size: 36px;
    color: #1e3c72;
    margin-bottom: 20px;
    font-weight: 700;
}

.main p {
    font-size: 18px;
    color: #666;
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: rgba(255,255,255,0.8);
    padding: 30px 40px;
    margin-top: 60px;
}

.footer .container {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(30, 60, 114, 0.3);
}

.btn-secondary {
    background: white;
    color: #1e3c72;
    border: 2px solid #1e3c72;
}

.btn-secondary:hover {
    background: #1e3c72;
    color: white;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.12);
}

/* 网格布局 */
.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 响应式 */
@media (max-width: 1200px) {
    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .main {
        padding: 40px 20px;
    }
    
    .main .container {
        padding: 40px 30px;
    }
}

@media (max-width: 768px) {
    .header .container {
        padding: 0 20px;
        height: 60px;
    }
    
    .nav {
        gap: 4px;
    }
    
    .nav-link {
        padding: 8px 12px;
        font-size: 14px;
    }
    
    .main h1 {
        font-size: 28px;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-primary {
    color: #1e3c72;
}

.text-secondary {
    color: #666;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}