/* ========================================
   公共样式文件
   ======================================== */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-color: #333;
    --bg-color: #f8f9fa;
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
}

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: white !important;
}

.navbar-nav .nav-link {
    color: rgba(255,255,255,0.9) !important;
    margin: 0 10px;
    transition: all 0.3s;
}

.navbar-nav .nav-link:hover {
    color: white !important;
    transform: translateY(-2px);
}

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 搜索框 */
.search-box {
    position: relative;
    max-width: 500px;
    margin: 30px auto;
}

.search-box input {
    border-radius: 25px;
    padding: 12px 50px 12px 20px;
    border: 2px solid #ddd;
}

.search-box button {
    position: absolute;
    right: 5px;
    top: 5px;
    border-radius: 20px;
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: white;
    padding: 40px 0 20px;
    margin-top: 60px;
}

footer a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}

footer a:hover {
    color: white;
}

/* 按钮样式 */
.btn-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    transition: all 0.3s;
}

.btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    color: white;
}

/* 模态框 */
.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
}