/* 顶部信息条样式 */
.zs-top-bar {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 8px 0;
    font-size: 0.875rem;
    text-align: center;
    position: relative;
    z-index: 1001;
}

.zs-top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.zs-top-bar-left,
.zs-top-bar-right {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.zs-top-bar-item {
    display: inline-flex;
    align-items: center;
}

/* 头部导航样式 */

.zs-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.zs-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.zs-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

/* Logo 样式 */
.zs-logo {
    display: flex;
    align-items: center;
}

.zs-logo h1 {
    margin: 0;
}

.zs-logo-img {
    height: 80px; /* 增加图片高度使其更清晰 */
    max-height: 100%;
    width: auto;
    display: block;
    object-fit: contain;
}

.zs-logo a {
    font-family: var(--font-family-en);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.zs-logo a:hover {
    color: var(--secondary-color);
}

/* 导航菜单样式 */
.zs-nav-list {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
}

.zs-nav-item {
    position: relative;
}

.zs-nav-link {
    font-family: var(--font-family-en);
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: var(--transition);
    position: relative;
}

.zs-nav-link:hover,
.zs-nav-link.active {
    color: var(--primary-color);
}

.zs-nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.zs-nav-link:hover::after,
.zs-nav-link.active::after {
    width: 80%;
}

/* 下拉菜单样式 */
.zs-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    min-width: 200px;
    width: max-content;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1001;
}

.zs-nav-item:hover > .zs-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.zs-dropdown li {
    list-style: none;
    margin: 0;
    position: relative;
}

.zs-dropdown a,
.zs-dropdown-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    font-size: 0.9rem;
    white-space: nowrap;
}

.zs-dropdown a:hover,
.zs-dropdown-link:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.zs-dropdown-item-has-children > .zs-dropdown-link {
    padding-right: calc(var(--spacing-md) + 14px);
}

.zs-dropdown-item-has-children > .zs-dropdown-link::after {
    content: '>';
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.zs-dropdown-level2 {
    top: 0;
    left: 100%;
    min-width: 220px;
    transform: translateX(10px);
    padding: var(--spacing-sm);
}

.zs-dropdown-item:hover > .zs-dropdown-level2 {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* 移动端菜单切换按钮 */
.zs-mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 30px;
    height: 30px;
    cursor: pointer;
}

.zs-mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
    transform-origin: center;
}

.zs-mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.zs-mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.zs-mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .zs-nav-list {
        gap: var(--spacing-md);
    }
    
    .zs-nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .zs-header-inner {
        padding: var(--spacing-xs) 0;
    }
    
    .zs-nav {
        position: fixed;
        top: 60px;
        right: -100%;
        width: 80%;
        height: calc(100vh - 60px);
        background: var(--white);
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        z-index: 999;
        overflow-y: auto;
    }
    
    .zs-nav.active {
        right: 0;
    }
    
    .zs-nav-list {
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
    }
    
    .zs-nav-link {
        font-size: 1.1rem;
        padding: var(--spacing-sm);
        display: block;
        text-align: left;
    }
    
    .zs-dropdown {
        position: static;
        transform: none;
        box-shadow: none;
        background: var(--bg-light);
        margin-top: var(--spacing-sm);
        opacity: 1;
        visibility: visible;
        display: block;
        min-width: 0;
        width: 100%;
        padding: var(--spacing-xs);
        border-radius: var(--border-radius-md);
    }
    
    .zs-nav-item:hover > .zs-dropdown,
    .zs-dropdown-item:hover > .zs-dropdown-level2 {
        transform: none;
    }
    
    .zs-dropdown-level2 {
        margin-top: var(--spacing-xs);
        margin-left: var(--spacing-md);
        padding-left: var(--spacing-sm);
        background: var(--white);
        border-left: 2px solid var(--primary-color);
    }
    
    .zs-mobile-toggle {
        display: flex;
    }
    
    .zs-nav-item {
        width: 100%;
        text-align: left;
    }

    .zs-dropdown a,
    .zs-dropdown-link {
        white-space: normal;
        text-align: left;
    }

    .zs-dropdown-item-has-children > .zs-dropdown-link::after {
        content: '';
    }
}

@media (max-width: 480px) {
    .zs-logo a {
        font-size: 1.25rem;
    }
    
    .zs-nav {
        width: 100%;
    }
    
    .zs-nav-list {
        padding: var(--spacing-lg);
    }
}