/* 导航栏样式 */
.main-nav {
    width: 100%;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    text-decoration: none;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link i {
    font-size: 1.1rem;
}

/* 底部样式 */
.main-footer {
    margin-top: 2rem;
    padding: 2rem 0;
    border-top: 1px solid #eee;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    text-align: center;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-link {
    text-decoration: none;
    margin: 0 1rem;
}

.footer-copyright {
    font-size: 0.9rem;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* 语言选择下拉菜单样式 */
.language-dropdown {
    position: relative;
    display: inline-block;
}

.lang-button {
    padding: 8px 12px;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lang-button i {
    font-size: 1.1rem;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    min-width: 120px;
    z-index: 1000;
    border-radius: 4px;
    overflow: hidden;
}

/* 桌面端hover显示下拉菜单 */
@media (min-width: 769px) {
    .language-dropdown:hover .dropdown-content {
        display: block;
    }
}

.lang-item {
    padding: 10px 15px;
    text-decoration: none;
    display: block;
    transition: background-color 0.2s;
}

.lang-item.active {
    font-weight: bold;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* 移动端导航样式 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: row;
        gap: 0;
    }
    
    .menu-toggle {
        display: block;
        z-index: 1001;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        right: -70%;
        height: 100vh;
        width: 70%;
        flex-direction: column;
        padding: 4rem 1.5rem 1.5rem;
        transition: right 0.3s ease;
        z-index: 1000;
    }

    .nav-links.active {
        display: flex;
        right: 0;
    }

    .nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .nav-overlay.active {
        display: block;
    }

    .nav-link {
        padding: 0.8rem 0;
    }

    .language-dropdown {
        width: 100%;
        margin-top: 1rem;
        cursor: pointer;
    }

    .dropdown-content {
        position: static;
        width: 100%;
        margin-top: 0.5rem;
        box-shadow: none;
        display: none;
    }

    .dropdown-content.show-mobile {
        display: block;
    }
}

/* 广告单元通用样式 */
.ad-unit {
    width: 100%;
    margin: 1rem 0;
    text-align: center;
    overflow: hidden;
}

/* 特定位置广告样式 */
.header-ad {
    margin-bottom: 0;
}

.sidebar-ad {
    margin: 1rem 0;
}

.content-ad {
    margin: 2rem 0;
}

.footer-ad {
    margin-top: 2rem;
    margin-bottom: 0;
}

/* 响应式广告样式 */
@media (max-width: 768px) {
    .ad-unit {
        margin: 0.5rem 0;
    }
    
    .content-ad {
        margin: 1rem 0;
    }
}

/* 反馈页面样式 */
.feedback-container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.feedback-form {
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

.submit-btn:hover {
    opacity: 0.9;
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown .dropdown-toggle {
    cursor: pointer;
}

.nav-dropdown .dropdown-content {
    display: none;
    position: absolute;
    background-color: #fff;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
    border-radius: 4px;
}

.nav-dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content .dropdown-item {
    color: #333;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content .dropdown-item:hover {
    background-color: #f1f1f1;
}

/* 深色主题样式 */
[data-theme="dark"] .dropdown-content {
    background-color: #333;
}

[data-theme="dark"] .dropdown-content .dropdown-item {
    color: #fff;
}

[data-theme="dark"] .dropdown-content .dropdown-item:hover {
    background-color: #444;
}