/* 全局重置和基础样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* 头部容器 */
.site-header {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 顶部条样式 */
.top-bar {
    height: 32px;
    line-height: 32px;
    border-bottom: 1px solid #eee;
    color: #707070;
    background: #f6f6f6;
    font-size: 14px;
}

.top-bar a {
    color: #707070 !important;
    text-decoration: none;
}

/* Logo区域样式 */
.header-main {
    padding: 15px 0;
    background: #fff;
}

.logo {
    flex: 0 0 auto;
}

.logo img {
    max-width: 100%;
    height: auto;
    max-height: 80px;
}

.site-title {
    margin: 0;
    font-size: 1.5rem;
    color: #004ea2;
    line-height: 1;
}

/* 平台文字样式 */
.platform-text {
    font-weight: bold;
    color: #495057;
    font-size: 1.1rem;
    text-align: center;
}

/* 搜索框样式 */
.search-container {
    display: flex;
    justify-content: flex-end;
}

.header-search {
    width: 100%;
    max-width: 300px;
}

.header-search form {
    display: flex;
    width: 100%;
}

.header-search input[type="text"] {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px 0 0 4px;
    font-size: 14px;
}

.header-search input[type="submit"] {
    padding: 8px 15px;
    background-color: #004ea2;
    color: white;
    border: 1px solid #004ea2;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-size: 14px;
}

.header-search input[type="submit"]:hover {
    background-color: #005cc4;
}

/* 导航菜单样式 */
.main-navigation {
    background: #004ea2;
    height: 46px;
    line-height: 46px;
}

.main-menu {
    display: flex;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-menu > li {
    position: relative;
    margin: 0 15px;
}

.main-menu > li > a {
    display: block;
    padding: 0 15px;
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.main-menu > li:hover > a {
    background-color: #005cc4;
}

/* 下拉菜单样式 */
.main-menu ul {
    position: absolute;
    top: 100%;
    left: 0;
    width: 200px;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: none;
    z-index: 1000;
    list-style: none;
    padding: 0;
    margin: 0;
}

.main-menu ul li:hover > ul {
    display: block;
    left: 100%;
    top: 0;
}

.main-menu ul li {
    margin: 0;
    height: auto;
    line-height: normal;
}

.main-menu ul li a {
    display: block;
    padding: 12px 15px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

.main-menu ul li a:hover {
    background-color: #f5f5f5;
    color: #004ea2;
}

.main-menu li:hover > ul {
    display: block;
}

/* 移动端导航样式 */
.mobile-navigation {
    display: none;
    background: #004ea2;
    padding: 10px 0;
}

.mobile-nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-nav-title {
    color: white;
    font-weight: bold;
    font-size: 18px;
}

.mobile-nav-btn {
    background: #005cc4;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
}

.mobile-nav-btn i {
    margin: 0;
}

/* 移动端菜单面板 */
.mobile-menu-panel {
    display: none;
    background: #f4f4f4;
    border-top: 1px solid #ddd;
    margin-top: 10px;
}

.mobile-menu-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-menu-list li {
    border-bottom: 1px solid #ddd;
}

.mobile-menu-list li a {
    display: block;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    font-size: 16px;
}

.mobile-menu-list li a:hover {
    background-color: #e9ecef;
}

/* 移动端搜索面板 */
.mobile-search-panel {
    display: none;
    background: #f4f4f4;
    border-top: 1px solid #ddd;
    margin-top: 10px;
    padding: 15px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .platform-text {
        font-size: 1rem;
    }
    
    .logo img {
        max-height: 70px;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }
    
    .header-main {
        padding: 10px 0;
    }
    
    .platform-text {
        margin: 10px 0;
        font-size: 1rem;
    }
    
    .search-container {
        justify-content: center;
        margin-top: 10px;
    }
    
    .header-search {
        max-width: 100%;
    }
    
    .main-navigation {
        display: none;
    }
    
    .mobile-navigation {
        display: block;
    }
}

@media (max-width: 576px) {
    .site-title {
        font-size: 1.2rem;
    }
    
    .platform-text {
        font-size: 0.9rem;
    }
}