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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
}

.btn-primary {
    background: #1a73e8;
    color: #fff;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

.btn-primary:hover {
    background: #1557b0;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.4);
}

.btn-secondary {
    background: #fff;
    color: #1a73e8;
    border: 2px solid #1a73e8;
}

.btn-secondary:hover {
    background: #1a73e8;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.3);
}

/* 导航栏 */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo a {
    font-size: 24px;
    font-weight: bold;
    color: #1a73e8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    color: #333;
    font-size: 16px;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #1a73e8;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1a73e8;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 20px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
}