/* 导航组件样式 */

.header {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    width: 100%;
}

/* 移动端确保导航栏固定 */
@media (max-width: 767px) {
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: var(--z-fixed);
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(15px);
    }
    
    /* 为固定导航栏添加页面顶部间距 */
    .main {
        padding-top: 70px; /* 根据导航栏高度调整 */
    }
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

/* Logo */
.header__logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header__logo img {
    height: 50px;
    width: auto;
}

.header__logo div {
    display: block !important;
    padding: 0 !important;
    background: transparent !important;
    color: var(--text-color) !important;
    font-weight: 600 !important;
    border-radius: 0 !important;
    font-size: var(--font-size-xl) !important;
}

/* 移动端菜单切换按钮 */
.header__toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: var(--z-fixed);
}

.header__toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.header__toggle--active span:nth-child(1) {
    transform: translateY(10.5px) rotate(45deg);
}

.header__toggle--active span:nth-child(2) {
    opacity: 0;
}

.header__toggle--active span:nth-child(3) {
    transform: translateY(-10.5px) rotate(-45deg);
}

/* 导航 */
.nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav__item {
    position: relative;
}

.nav__link {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-color);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav__link:hover {
    color: var(--primary-color);
}

.nav__link:hover::after {
    width: 80%;
}

.nav__link:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

/* 当前页面高亮 */
.nav__item--active .nav__link {
    color: var(--primary-color);
    font-weight: 600;
}

.nav__item--active .nav__link::after {
    width: 80%;
}

/* 移动端样式 */
@media (max-width: 767px) {
    .header__toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 250px; /* 减少宽度 */
        background-color: rgba(255, 255, 255, 0.98);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-base);
        padding-top: 70px; /* 减少顶部padding */
        z-index: var(--z-fixed);
        backdrop-filter: blur(10px);
        border-radius: 0 0 0 var(--radius-lg);
        /* 让菜单高度完全由内容决定 */
        display: flex;
        flex-direction: column;
    }
    
    .nav--open {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        margin: 0;
        padding: 0 0 var(--spacing-md) 0; /* 只在底部添加少量padding */
    }
    
    .nav__link {
        padding: var(--spacing-sm) var(--spacing-lg); /* 减少垂直padding */
        border-bottom: 1px solid var(--border-color);
        font-size: var(--font-size-base); /* 确保字体大小合适 */
    }
    
    .nav__link::after {
        display: none;
    }
    
    .nav__link:hover {
        background-color: var(--light-background);
    }
    
    .nav__item--active .nav__link {
        background-color: var(--light-background);
        border-left: 4px solid var(--primary-color);
    }
}

/* 平板端样式 */
@media (min-width: 768px) and (max-width: 1023px) {
    .nav__list {
        gap: var(--spacing-sm);
    }
    
    .nav__link {
        padding: var(--spacing-xs);
        font-size: var(--font-size-sm);
    }
}