#header-container .nav{
   background: transparent;
   transition: all 0.2s ease;
}

#header-container .nav:hover {
  background: url("/images/nav-bg.jpg") no-repeat center / cover !important;
}

#header-container .nav .menu .split-line {
    color: transparent;
}

#header-container .nav:hover .menu .split-line{
    color: var(--color-primary-11);
}

.blog-bg{
    box-sizing: border-box;
    width: 100%;
    height: 32vh;
    min-height: 18.75rem;
    position: relative;
    border-top: 1px solid transparent;
}

.blog-bg .bg {
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    object-fit: cover;
    height: 100%;
    width: 100%;
}

.blog-bg .mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.1);
    z-index: 0;
}

.blog-bg .title {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    font-size: 3rem;
    font-weight: 600;
    letter-spacing: 0.15rem;
    color: #ffffff;
    z-index: 1;
}

.blog-container {
    width: 80vw;
    max-width: 1200px;
    margin: 3.75rem auto;
    border-top: 1px solid transparent;
    position: relative;
}

/* 第一部分：标题和搜索区域 */
.header-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.title-area h1 {
    font-size: 2.2rem;
    color: var(--color-primary-11);
    font-weight: 700;
}

.search-result {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-result h1 {
    font-size: 2.2rem;
    color: var(--color-primary-11);
    font-weight: 700;
    margin: 0;
}

.filter-tags-container {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    width: 37.5rem;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 2px;
}

.filter-tag {
    display: flex;
    justify-content: flex-start;
    flex-wrap: no-wrap;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-white);
    padding: .375rem .75rem;
    border-radius: 4px;
    box-shadow: 0 0px 2px rgba(0, 0, 0, 0.15);
    animation: fadeIn 0.5s ease;
    font-size: 0.85rem;
}

.filter-tag span {
    font-weight: 500;
    color: var(--color-primary-5);
}

.close-btn {
    background: none;
    border: none;
    color: var(--color-primary-5);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
}

.close-btn:hover {
    color: var(--brand-color);
    transform: scale(1.1);
}

.search-area {
    position: relative;
    width: 18.75rem;
}

.search-input {
    box-sizing: border-box;
    width: 100%;
    padding: .75rem 2.8125rem;
    border: none;
    border-bottom: 2px solid var(--color-primary-4);
    background: transparent;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-bottom-color: var(--brand-color);
}

.search-input:focus +.search-icon {
    color: var(--brand-color);
}

.search-input::placeholder {
  color: var(--color-primary-7);
  opacity: 0.8;
}

.search-icon, .clear-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-primary-5);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.search-icon {
    left: .9375rem;
}

.clear-icon {
    right: .9375rem;
    opacity: 0;
    pointer-events: none;
}

.search-input:not(:placeholder-shown) ~ .clear-icon {
    opacity: 1;
    pointer-events: all;
}

.clear-icon:hover {
    color: var(--brand-color);
}

/* 第二部分：筛选区域 */
.filter-section {
    margin-bottom: 2.5rem;
}

.filter-container {
    display: flex;
    gap: 2rem;
    justify-content: space-between;
}

.filter-group {
    flex: 1;
    position: relative;
}

.filter-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-primary-11);
    font-size: 1.05rem;
}

.custom-select {
    position: relative;
    width: 100%;
}

.select-selected {
    background-color: var(--color-white);
    padding: .875rem .9375rem;
    border: 1px solid var(--color-primary-4);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    font-size: 1.05rem;
    color: var(--color-primary-6);
}

.select-selected:after {
    content: "\f078";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    transition: var(--transition);
}

.select-selected.active:after {
    transform: rotate(180deg);
}

.select-selected:hover {
    border-color: var(--brand-color);
    box-shadow: 0 2px 8px rgba(192, 0, 0, 0.15);
}

.select-selected.has-selection {
    color: var(--color-primary-10);
}

.select-items {
    position: absolute;
    background-color: var(--color-white);
    top: 100%;
    left: 0;
    right: 0;
    z-index: 99;
    border-radius:0 0 4px 4px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    scrollbar-width: none;
}

.select-items::-webkit-scrollbar {
    display: none;
}

.select-items.active {
    max-height: 12.5rem;
    overflow-y: auto;
}

.select-item {
    padding: .875rem .9375rem;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.05rem;
    color: var(--color-primary-8);
}

.select-item:hover {
    background-color: var(--bg-color-hover);
}

.select-item:hover .blog-title{
    color: var(--accent-color);
}

.select-item.selected {
    background-color: var(--brand-color);
    color: var(--color-white);
}

/* 第三部分：博客展示区 */
.blog-section {
    margin-bottom: 2.5rem;
}

.blog-list {
    display: flex;
    flex-direction: column;
}

.blog-item {
    display: flex;
    gap: 6.25rem;
    padding: 2rem;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    border-bottom: 1px solid var(--color-primary-4);
    text-decoration: none;
    color: inherit;
    align-items: flex-start;
}

.blog-item:last-child {
    border-bottom: none;
}

.blog-item:hover {
    background-color: var(--bg-color-hover)
}

.blog-item:hover .blog-title{
    color: var(--accent-color);
}

.blog-image {
    width: 28.125rem;
    height: 16.25rem;
    border-radius: 6px;
    overflow: hidden;
    flex-shrink: 0;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.blog-item:hover .blog-image img {
    transform: scale(1.05);
}

.blog-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 16.25rem;
    justify-content: space-between;
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: .5rem;
    color: var(--color-primary-7);
    font-size: 1rem;
}

.blog-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary-10);
    transition: var(--transition);
    margin: 1.25rem 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.blog-abstract {
    color: var(--color-primary-8);
    line-height: 1.7;
    font-size: 1rem;
    margin-bottom: 1.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary-9);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 500;
}

.blog-item:hover .blog-link {
    gap: .75rem;
    color: var(--brand-color);
}

/* 第四部分：分页区域 */
.pagination-section {
    display: flex;
    justify-content: center;
    margin-top: 2.5rem;
}

.pagination {
    display: flex;
    gap: 1rem;
}

.page-number {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    background-color: var(--color-white);
    color: var(--color-primary-8);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    font-size: 1rem;
}

.page-number:hover {
    background-color: var(--brand-color);
    color: var(--color-white);
}

.page-number.active {
    background-color: var(--brand-color);
    color: var(--color-white);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .blog-item {
        gap: 6.25rem;
    }
}

@media (max-width: 992px) {
    .blog-container {
        width: 90%;
    }

    .header-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
    }

    .search-area {
        width: 100%;
    }

    .filter-container {
        flex-direction: column;
        gap: .9375rem;
    }

    .blog-item {
        flex-direction: column;
        gap: 1.875rem;
        padding: 1.875rem 0;
    }

    .blog-image {
        width: 100%;
        height: 13.75rem;
    }

    .blog-content {
        height: auto;
        gap: 1.25rem;
    }

    .blog-title {
        font-size: 1.5rem;
        margin: .9375rem 0;
    }
    
    .blog-abstract {
        font-size: 1rem;
        margin-bottom: .9375rem;
    }

    .blog-link {
        font-size: 0.95rem;
    }
}

@media (max-width: 768px) {
    .blog-bg{
        box-sizing: border-box;
        width: 100%;
        height: 16rem;
        min-height: 16rem;
        position: relative;
        border-top: 1px solid transparent;
    }

    .blog-container {
        width: 90%;
        margin: 2rem auto;
    }

    .header-section {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        margin-bottom: 2rem;
    }

    .title-area h1 {
        font-size: 2rem;
    }

    .search-result {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 90vw;
        flex-wrap: wrap;
    }

    .search-result h1 {
        font-size: 2rem;
    }

    .filter-tags-container {
        width: 100%;
        gap: 0.5rem;
        justify-content: center;
        align-items: center;
    }

    .search-area {
        width: 100%;
    }

    .filter-tag {
        font-size: 0.85rem;
        padding: 4px 8px;
    }

    .blog-item {
        padding: 16px 0;
        gap: 16px;
    }

    .blog-image {
        height: 200px;
    }

    .blog-title {
        font-size: 1.3rem;
        margin: 0px 0;
    }

    .blog-abstract {
        font-size: 0.95rem;
        margin-bottom: 0px;
    }

    .blog-meta {
        font-size: 0.9rem;
    }

    .blog-link {
        font-size: 0.9rem;
    }

    .page-number {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .pagination {
        gap: 10px;
    }

    .filter-label {
        font-size: 1rem;
    }
    .select-selected, .select-item {
        font-size: 1rem;
        padding: 12px 15px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 隐藏筛选区域的样式 */
.filter-section.hidden {
    display: none;
}

/* 无结果提示样式 */
.no-results {
    text-align: center;
    padding: 40px;
    color: var(--color-primary-8);
    font-size: 1.2rem;
}