:root {
    --color-dark-gray: #333;
    --color-light-gray: #666;
    --gap-normal: 1rem;
    --max-width: 200rem;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    list-style: none;
    line-height: 1.5;
    color: var(--color-dark-gray);
}
button {
    border: none;
    background: transparent;
}

body::-webkit-scrollbar {
    width: 1px;
}

body::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

body::-webkit-scrollbar-thumb {
    background: #ffffff;
    border-radius: 3px;
}

.sidebar-container {
    grid-area: sidebar;
}
.list-container {
    grid-area: list;
}

@media (min-width: 768px) {
    .sidebar-container {
        position: sticky;
        bottom: 1rem;
        background: linear-gradient(135deg, #67c23a 0%, #83e354 50%, #67c23a 100%);
        padding: 1rem 3rem;
        border-radius: .5rem;
        pointer-events: none;
        box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        z-index: 1;
    }
}

.container {
    display: grid;
    margin: 0 auto;
    max-width: var(--max-width);
    grid-template-columns: repeat(12, 1fr);
    grid-template-areas:
        "list list list list list list list list list list list list"
        ". . sidebar sidebar sidebar sidebar sidebar sidebar sidebar sidebar . .";
    gap: var(--gap-normal);
}
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        grid-template-areas:
            "sidebar"
            "list";
    }
}
.list-container {
    width: 100%;
    padding: 1rem .5rem;
    display: grid;
    grid-auto-rows: 32rem;
    gap: var(--gap-normal);
    grid-template-columns: repeat(auto-fill, minmax(30rem, 1fr));
}
@media (max-width: 768px) {
    .list-container {
        grid-template-columns: 1fr;
        grid-auto-rows: minmax(32rem, auto);
        padding: 1rem .5rem;
    }
}
.list-panel {
    display: flex;
    flex-direction: column;
    background-color: white;
    border-radius: .5rem;
    overflow: hidden;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}
.list-image img {
    width: 100%;
    height: 100%;
    max-height: 15rem;
    object-fit: cover;
    object-position: top center;
    border-top-left-radius: .5rem;
    border-top-right-radius: .5rem;
    transition: transform 0.3s;
}
.list-image img:hover {
    cursor: pointer;
}
.list-title {
    padding: 1rem 1rem .5rem;
    font-size: 1.125rem;
    font-weight: 600;
}
.list-description {
    padding: 0 1rem 1rem;
    font-size: 1rem;
    color: var(--color-light-gray);
    flex-grow: 1;
    font-weight: 300;
}
.list-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    padding: 0 1rem 1rem;
}
.list-tags .tag {
    padding: 4px .5rem;
    font-size: 0.875rem;
    border-radius: 3px;
}

.list-tags .type {
    background-color: #6daf48;
    color: white;
}

.list-tags .category {
    background-color: #53c92d;
    color: white;
}

.list-tags .date {
    background-color: #f39c12;
    color: white;
}

.list-tags .views {
    background-color: #9b59b6;
    color: white;
}
.list-controls {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    padding: 15px;
    width: 100%;
}
.list-controls a:has(img) {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.list-controls img {
    max-width: 2.5rem;
    max-height: 2.5rem;
    object-fit: contain;
}
@media (min-width: 769px) {
    .list-controls img {
        will-change: transform;
        transition: transform 0.4s cubic-bezier(0.18, 0.89, 0.32, 1.28); /* 延长持续时间并使用弹性曲线 */
        transform: translateZ(0); /* 新增：启用GPU加速 */
    }
    .list-controls img:hover  {
        transform-origin: bottom center;
        transform: scale(1.5) translateZ(0);
        cursor: pointer;
    }
}
@media (max-width: 768px) {
    .list-controls img {
        max-width: 2.5rem;
        max-height: 2.5rem;
    }
}
.list-link,
.list-link-outside
{
    display: block;
    text-align: center;
    padding: .5rem 1rem;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
    width: 100%;
    box-sizing: border-box;
    border-radius: 8px;
    background: #fff;
    border: 1px solid #dcdfe6;
    color: #606266;
    font-size: 1rem;
}
.list-link:hover,
.list-link-outside:hover
{
    color: #409eff;
    border-color: #c6e2ff;
    background-color: #ecf5ff;
}

.filter-section {
    width: 100%;
}
.filter-section h3 {
    margin-bottom: 10px;
    font-size: 1.125rem;
    color: #555;
}
@media (min-width: 768px) {
   .filter-section h3 {
       color: white;
    }
}
.lecturer-container {
    overflow-x: auto;
    scroll-behavior: smooth;
    width: 100%;
    scroll-snap-type: x mandatory;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.lecturer-container.active {
    cursor: grabbing;
    user-select: none;
}
@media (max-width: 768px) {
    .lecturer-container {
        max-inline-size: 100%;
        overflow-x: scroll;
        scroll-snap-type: inline mandatory;
        scroll-behavior: smooth;
        scrollbar-width: none;
        width: 93vw;
    }
}
ul.scroll-nav {
    width: 100%;
    display: flex;
    gap: .5rem;
    flex-wrap: nowrap;
    touch-action: pan-x;
    pointer-events: auto;
    align-items: center;
}
ul.scroll-nav li {
    scroll-snap-align: start;
    padding: .5em 1em;
    list-style: none;
    border-radius: .5em;
    margin-bottom: 5px;
    flex: 0 0 auto;
    min-width: 8rem;
    text-align: center;
    position: relative;
}

@media (min-width: 769px) {
    ul.scroll-nav {
        min-height: 6rem;
    }
    ul.scroll-nav li {
        transition: transform 0.4s cubic-bezier(0.18, 0.89, 0.32, 1.28);
        transform: translateZ(0);
    }

    ul.scroll-nav li:hover {
        transform-origin: bottom center;
        transform: scale(1.5) translateZ(0);
        box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
        background-color: rgba(4, 89, 53, 0.8);
        z-index: 10;
        border-radius: 100%;
        cursor: pointer;
    }
}

li.tag {
    display: inline-block;
    padding: 6px 12px;
    border-radius: .5rem;
    font-size: 1rem;
    transition: all 0.3s;
    box-shadow: 1px 1px 0 rgba(0, 0, 0, 0.05);
    color: #67c23a;
    background: #f0f9eb;
    border-color: #c2e7b0;
}
.tag.active {
    background-color: #67c23a;
}

ul.scroll-nav li .tag-name  {
    color: #67c23a;
}

.tag.active .tag-name {
    color: #fff;
}

.search-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}
.search-container .search-box {
    width: 40%;
    margin: 0 auto;
}
.search-box input {
    width: 100%;
    flex: 1;
    box-sizing: border-box;
    padding: 0.75rem 1rem;
    border: 2px solid #c2e7b0;
    border-radius: 4px;
    font-size: 1rem;
    outline: none;
    background-image: url(../img/search.svg);
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 2rem;
    pointer-events: auto;
}
.mobile-filter-menu-container,
.mobile-filter-fresh-container
{
    display: none;
}
@media (max-width: 768px) {
    .sidebar-container {
        position: sticky;
        top: 4rem;
        background-color: white;
        margin: 0 auto;
    }
    .search-container {
        flex-direction: row;
        gap: 1rem;
        margin-top: 1rem;
        margin-bottom: 1rem;
        width: 95vw;
    }
    .search-container .search-box {
        display: flex;
        width: 100%;
        column-gap: 1rem;
        margin-bottom: 0;
    }
    .search-box input {
        border-radius: .5rem;
        border: 1px solid #ddd;
    }
    .mobile-filter-menu-container,
    .mobile-filter-fresh-container
    {
        display: block;
    }
    .mobile-filter-menu img,
    .mobile-fresh-menu img
    {
        width: 3rem;
        height: 3rem;
    }
    .filter-container {
        margin-top: 0;
    }
    .mobile-filter.active  {
        display: block;
        opacity: 1;
        visibility: visible;
    }
}

/* 若列表容器需要固定高度滚动 */
.list-container {
    height: 100vh;
    overflow-y: auto;
}

.list-container::-webkit-scrollbar {
    width: 3px;
}

.list-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.list-container::-webkit-scrollbar-thumb {
    background: #c2e7b0;
    border-radius: 3px;
}

/* 加载提示样式 */
.loading-tip {
    text-align: center;
    padding: 1rem;
    color: #666;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .filter-container {
        display: none;
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    .filter-container.active {
        opacity: 1;
        display: flex;
    }
}