/* 首页：团队动态 — 哔哩哔哩式单屏横幅轮播（横滑 + 底点 + 左右箭头） */

.bilibili-news-carousel {
    position: relative;
}

#news-bilibili-viewport {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: clamp(220px, 40vh, 420px);
}

#intro .home-hero-intro-card__media,
#intro .home-top-card__news,
#intro #news-carousel-wrap,
#intro #news-bilibili-viewport {
    height: clamp(220px, 40vh, 420px);
}

@media (min-width: 640px) {
    #news-bilibili-viewport,
    #intro .home-hero-intro-card__media,
    #intro .home-top-card__news,
    #intro #news-carousel-wrap,
    #intro #news-bilibili-viewport {
        height: clamp(260px, 44vh, 460px);
    }
}

@media (min-width: 1024px) {
    #news-bilibili-viewport,
    #intro .home-hero-intro-card__media,
    #intro .home-top-card__news,
    #intro #news-carousel-wrap,
    #intro #news-bilibili-viewport {
        height: min(52vh, 560px);
    }
}

/* 轨道高度与视口一致 */
#news-bilibili-track {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    width: 100%;
    height: clamp(220px, 40vh, 420px);
}

@media (min-width: 640px) {
    #news-bilibili-track {
        height: clamp(260px, 44vh, 460px);
    }
}

@media (min-width: 1024px) {
    #news-bilibili-track {
        height: min(52vh, 560px);
    }
}

.bilibili-news-slide {
    position: relative;
    display: block;
    flex: 0 0 auto;
    height: 100%;
    min-height: 100%;
    overflow: hidden;
}

.bilibili-news-slide > img {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.bilibili-news-track {
    will-change: transform;
}

/* 轮播轨道宽度与每屏宽度：用 news-count-1 … news-count-10 避免在 HTML 的 style 里写 Jinja（否则 IDE 会误报 CSS 错误） */
#news-bilibili-viewport.news-count-1 #news-bilibili-track {
    width: 100%;
}
#news-bilibili-viewport.news-count-1 .bilibili-news-slide {
    width: 100%;
    min-width: 100%;
}
#news-bilibili-viewport.news-count-2 #news-bilibili-track {
    width: 200%;
}
#news-bilibili-viewport.news-count-2 .bilibili-news-slide {
    width: 50%;
    min-width: 50%;
}
#news-bilibili-viewport.news-count-3 #news-bilibili-track {
    width: 300%;
}
#news-bilibili-viewport.news-count-3 .bilibili-news-slide {
    width: 33.333333%;
    min-width: 33.333333%;
}
#news-bilibili-viewport.news-count-4 #news-bilibili-track {
    width: 400%;
}
#news-bilibili-viewport.news-count-4 .bilibili-news-slide {
    width: 25%;
    min-width: 25%;
}
#news-bilibili-viewport.news-count-5 #news-bilibili-track {
    width: 500%;
}
#news-bilibili-viewport.news-count-5 .bilibili-news-slide {
    width: 20%;
    min-width: 20%;
}
#news-bilibili-viewport.news-count-6 #news-bilibili-track {
    width: 600%;
}
#news-bilibili-viewport.news-count-6 .bilibili-news-slide {
    width: 16.666667%;
    min-width: 16.666667%;
}
#news-bilibili-viewport.news-count-7 #news-bilibili-track {
    width: 700%;
}
#news-bilibili-viewport.news-count-7 .bilibili-news-slide {
    width: 14.285714%;
    min-width: 14.285714%;
}
#news-bilibili-viewport.news-count-8 #news-bilibili-track {
    width: 800%;
}
#news-bilibili-viewport.news-count-8 .bilibili-news-slide {
    width: 12.5%;
    min-width: 12.5%;
}
#news-bilibili-viewport.news-count-9 #news-bilibili-track {
    width: 900%;
}
#news-bilibili-viewport.news-count-9 .bilibili-news-slide {
    width: 11.111111%;
    min-width: 11.111111%;
}
#news-bilibili-viewport.news-count-10 #news-bilibili-track {
    width: 1000%;
}
#news-bilibili-viewport.news-count-10 .bilibili-news-slide {
    width: 10%;
    min-width: 10%;
}

/* 底栏圆点：inactive 小圆点，当前项为与主导航一致的品牌蓝胶囊 */
#news-bilibili-dots {
    align-items: center;
}

.bilibili-news-dot {
    pointer-events: auto;
    flex-shrink: 0;
    height: 8px;
    min-width: 8px;
    padding: 0;
    border: none;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.45);
    cursor: pointer;
    transition:
        width 0.25s ease,
        background 0.25s ease,
        opacity 0.25s ease;
}

.bilibili-news-dot:hover {
    background: rgba(255, 255, 255, 0.75);
}

.bilibili-news-dot--active {
    width: 18px;
    min-width: 18px;
    border-radius: 0;
    background: #163268;
    box-shadow: 0 0 10px rgba(22, 50, 104, 0.55);
}

.bilibili-news-dot--active:hover {
    background: #3d7dff;
}

/* 左右箭头：半透明白底，悬停整块区域时更明显（group-hover） */
.bilibili-news-arrow {
    position: absolute;
    top: 50%;
    z-index: 30;
    display: flex;
    width: 2.5rem;
    height: 2.5rem;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 0.95rem;
    cursor: pointer;
    transform: translateY(-50%);
    transition:
        background 0.2s ease,
        opacity 0.2s ease,
        transform 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.bilibili-news-arrow:hover {
    background: rgba(255, 255, 255, 0.28);
}

.bilibili-news-arrow:active {
    transform: translateY(-50%) scale(0.96);
}

.bilibili-news-arrow--prev {
    left: 0.75rem;
}

.bilibili-news-arrow--next {
    right: 0.75rem;
}

@media (min-width: 640px) {
    .bilibili-news-arrow {
        width: 2.75rem;
        height: 2.75rem;
        font-size: 1rem;
    }

    .bilibili-news-arrow--prev {
        left: 1rem;
    }

    .bilibili-news-arrow--next {
        right: 1rem;
    }

    .bilibili-news-carousel:not(:hover) .bilibili-news-arrow {
        opacity: 0.55;
    }

    .bilibili-news-carousel:hover .bilibili-news-arrow {
        opacity: 1;
    }
}

@media (max-width: 639px) {
    .bilibili-news-arrow {
        opacity: 0.85;
        width: 2.25rem;
        height: 2.25rem;
        font-size: 0.85rem;
    }

    .bilibili-news-arrow--prev {
        left: 0.5rem;
    }

    .bilibili-news-arrow--next {
        right: 0.5rem;
    }
}

.bilibili-news-arrow:disabled {
    opacity: 0.35 !important;
    cursor: default;
    pointer-events: none;
}

/* ========== #news_bottom：首页双栏（学术活动 | 通知活动） ========== */
/* 主题色：品牌深 / 中 / 浅 */
#news_bottom.home-news-zju-root {
    --hn-theme: #0a032e;
    --hn-theme-mid: #163268;
    --hn-theme-light: #85b1e0;
    --hn-shadow: 0 4px 22px rgba(10, 3, 46, 0.12);
}

/* 科研成果列与学术活动共用主题色（对齐 zju 学术报告区蓝色时间轴） */
#news_bottom .home-news-zju {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.35rem;
    align-items: stretch;
}

@media (min-width: 900px) {
    #news_bottom .home-news-zju {
        /* 学术活动列宽于通知活动（约 65% : 35%） */
        grid-template-columns: minmax(0, 1.85fr) minmax(0, 1fr);
        gap: 1.65rem;
    }
}

#news_bottom .home-news-zju-col {
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
}

/* 3D 书本有透视与悬停位移，避免被列容器裁切 */
#news_bottom .home-news-zju-col--research {
    overflow: visible;
}

/* 标题行：对齐 zju .common-title */
#news_bottom .home-news-zju-col__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-shrink: 0;
    padding: 0.75rem 1rem 0.75rem 0.85rem;
    border-bottom: none;
    background: transparent;
}

#news_bottom .home-news-zju-col__title-row {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    min-width: 0;
}

#news_bottom .home-news-zju-col__icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0;
    line-height: 0;
    color: var(--hn-theme-mid);
    background: transparent;
    box-shadow: none;
}

#news_bottom .home-news-zju-col__icon .site-icon {
    width: 1.25rem;
    height: 1.25rem;
}

#news_bottom .home-news-zju-col__title {
    margin: 0;
    font-size: clamp(1.05rem, 0.95rem + 0.35vw, 1.22rem);
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--hn-theme-mid);
    line-height: 1.25;
}

#news_bottom .home-news-zju-col__more {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: #64748b;
    text-decoration: none;
    white-space: nowrap;
    transition: color 0.25s ease;
}

#news_bottom .home-news-zju-col__more-text {
    transition: color 0.25s ease;
}

#news_bottom .home-news-zju-col__more-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0;
    line-height: 0;
    color: #94a3b8;
    background: transparent;
    transition:
        color 0.25s ease,
        transform 0.25s ease;
}

#news_bottom .home-news-zju-col__more-ico .site-icon {
    width: 0.72rem;
    height: 0.72rem;
}

#news_bottom .home-news-zju-col__more:hover {
    color: var(--hn-theme-mid);
}

#news_bottom .home-news-zju-col__more:hover .home-news-zju-col__more-text {
    color: var(--hn-theme-mid);
}

#news_bottom .home-news-zju-col__more:hover .home-news-zju-col__more-ico {
    color: var(--hn-theme-mid);
    transform: translateX(2px);
}

#news_bottom .home-news-zju-col__body {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 0.85rem 1.1rem;
    flex: 1;
    background: transparent;
}

/* 学术活动：两列子网格，每列最多 3 条（数据由后端至多 6 条） */
#news_bottom .home-news-zju-col__body--academic-grid {
    display: block;
}

/* 两列网格：每行两卡同高（stretch）；条目顺序自上而下再右列 */
#news_bottom .home-news-academic-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem 0.85rem;
    align-items: stretch;
}

#news_bottom .home-news-academic-grid__cell {
    display: flex;
    min-width: 0;
    min-height: 0;
}

/* 双列内卡片略紧凑；轮廓 + 阴影与列表底区分开 */
#news_bottom .home-news-academic-grid .home-news-zju-card.news-item {
    flex: 1;
    align-self: stretch;
    width: 100%;
    min-height: 100%;
    gap: 0.65rem;
    padding: 0.75rem 0.65rem;
    border: 1px solid rgba(226, 232, 240, 0.92);
    background: rgba(255, 255, 255, 0.94);
    box-shadow:
        0 0 0 1px rgba(10, 3, 46, 0.04),
        0 1px 2px rgba(10, 3, 46, 0.06),
        0 8px 24px rgba(10, 3, 46, 0.1);
    transition:
        box-shadow 0.3s ease,
        transform 0.3s ease,
        border-color 0.3s ease,
        background-color 0.3s ease;
}

#news_bottom .home-news-academic-grid .home-news-zju-card.news-item::before {
    background: linear-gradient(180deg, #94070a 0%, #7a0609 100%);
}

#news_bottom .home-news-academic-grid .home-news-zju-card.news-item::after {
    background: linear-gradient(105deg, #7a0609 0%, #94070a 45%, #b42318 100%);
}

#news_bottom .home-news-academic-grid .home-news-zju-card.news-item:hover {
    padding: 0.75rem 0.65rem;
    border-color: rgba(255, 255, 255, 0.35);
    background: transparent;
    box-shadow:
        0 0 0 1px rgba(148, 7, 10, 0.18),
        0 4px 14px rgba(148, 7, 10, 0.16),
        0 18px 42px rgba(148, 7, 10, 0.24);
    transform: translateY(-2px);
}

#news_bottom .home-news-academic-grid .home-news-zju-card.news-item:hover::after {
    opacity: 1;
}

#news_bottom .home-news-academic-grid .home-news-zju-card:hover .news-tag {
    background: rgba(255, 255, 255, 0.22);
    color: #fff;
}

#news_bottom .home-news-academic-grid .home-news-zju-card .news-date-box {
    width: 3.15rem;
    height: 3.15rem;
}

#news_bottom .home-news-academic-grid .home-news-zju-card .news-date-day {
    font-size: 1.1rem;
}

#news_bottom .home-news-academic-grid .home-news-zju-card .news-content-wrap {
    display: flex;
    flex: 1;
    flex-direction: column;
    min-height: 0;
}

#news_bottom .home-news-academic-grid .home-news-zju-card .news-title {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.35rem;
    margin: 0 0 0.4rem;
    min-height: 2.61rem;
    font-size: 0.9rem;
    line-height: 1.45;
}

#news_bottom .home-news-academic-grid .home-news-zju-card .news-title__text {
    display: -webkit-box;
    min-width: 0;
    flex: 1 1 0;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
}

#news_bottom .home-news-academic-grid .home-news-zju-card .news-summary {
    font-size: 0.8rem;
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    min-height: 2.592rem;
    margin: 0 0 0.4rem;
}

#news_bottom .home-news-academic-grid .home-news-zju-card .news-meta {
    margin-top: auto;
}

@media (max-width: 639px) {
    #news_bottom .home-news-academic-grid {
        grid-template-columns: 1fr;
    }
}

#news_bottom .home-news-zju-empty {
    margin: 0;
    padding: 2.25rem 1rem;
    text-align: center;
    font-size: 0.875rem;
    color: #94a3b8;
}

/* —— 通知活动：参考 math.ac.cn「通知公告」列表样式 —— */
#news_bottom .home-news-notice-body {
    padding: 0.35rem 0.85rem 1.1rem;
    background: transparent;
    border: none;
    box-shadow: none;
}

#news_bottom .home-news-notice-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

#news_bottom .home-news-notice-list__item {
    border-bottom: 1px dashed #e2e8f0;
}

#news_bottom .home-news-notice-list__item:last-child {
    border-bottom: none;
}

#news_bottom .home-news-notice-list__link {
    display: flex;
    align-items: baseline;
    gap: 0.85rem;
    padding: 0.72rem 0.15rem;
    text-decoration: none;
    color: inherit;
    transition: background-color 0.2s ease;
}

#news_bottom .home-news-notice-list__link:hover {
    background: rgba(148, 7, 10, 0.04);
}

#news_bottom .home-news-notice-list__link:focus-visible {
    outline: 2px solid #94070a;
    outline-offset: 2px;
}

#news_bottom .home-news-notice-list__date {
    flex-shrink: 0;
    width: 6.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.01em;
    color: #64748b;
    white-space: nowrap;
}

#news_bottom .home-news-notice-list__link:hover .home-news-notice-list__date {
    color: #475569;
}

#news_bottom .home-news-notice-list__title {
    display: flex;
    min-width: 0;
    flex: 1;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.9375rem;
    line-height: 1.55;
    color: #334155;
}

#news_bottom .home-news-notice-list__title-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#news_bottom .home-news-notice-list__link:hover .home-news-notice-list__title {
    color: #94070a;
}

#news_bottom .home-news-notice-list__badge {
    flex-shrink: 0;
    padding: 0.1rem 0.35rem;
    background: #ff4d4f;
    color: #fff;
    font-size: 0.625rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.02em;
}

@media (max-width: 639px) {
    #news_bottom .home-news-notice-list__link {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
        padding: 0.65rem 0.1rem;
    }

    #news_bottom .home-news-notice-list__date {
        width: auto;
        font-size: 0.8125rem;
    }

    #news_bottom .home-news-notice-list__title-text {
        white-space: normal;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }
}

/* —— 科研成果：gs.zju .section2 .academic（时间轴 + 左图 + 标题 + .rows）—— */
/* 科研成果列表区：可纵向滚动（竖向时间轴线已移除） */
#news_bottom .home-news-zju-col__body--academic-track {
    display: block;
    padding: 0.75rem 0.45rem 0.85rem 0.45rem;
    gap: 0;
    max-height: min(68vh, 26.5rem);
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
}

#news_bottom .home-news-zju-col__body--academic-track::-webkit-scrollbar {
    width: 6px;
}

#news_bottom .home-news-zju-col__body--academic-track::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 0;
}

#news_bottom .home-news-zju-col__body--academic-track::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 0;
}

#news_bottom .home-news-zju-col__body--academic-track::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* 科研成果：右栏 3D 书本轮换（需 cover_img） */
#news_bottom .home-news-zju-col__body--research-books {
    display: block;
    padding: 0.55rem 0.3rem 1rem;
    overflow: visible;
}

/* 主册 3D 翻页会超出盒高：勿在轨道上用 overflow:hidden 裁切顶部 */
#news_bottom .home-news-zju-col__body--research-books .home-news-book-carousel {
    overflow: visible;
}

#news_bottom .home-news-zju-col__body--research-books .home-news-book-carousel__track.home-news-book-carousel--ready {
    overflow: visible;
    padding-top: clamp(1.15rem, 3.5vw, 2.35rem);
}

@media (min-width: 900px) {
    #news_bottom .home-news-zju-col__body--research-books .home-news-book-carousel__track.home-news-book-carousel--ready {
        min-height: clamp(20.5rem, 38vw, 36.5rem);
        padding-top: clamp(1.35rem, 3.75vw, 2.85rem);
        --hb-carousel-pad-b: clamp(2.35rem, 5.75vw, 4.35rem);
        /* 半栏内主册与侧册底对齐差略加大，避免主册仍显偏低 */
        --hb-featured-pad-b: calc(var(--hb-carousel-pad-b) + clamp(1.35rem, 3.25vw, 2.85rem));
        --hb-featured-w: clamp(11.5rem, 22.5vw, 17.25rem);
        --hb-featured-h: clamp(17.25rem, 33.75vw, 25.875rem);
        --hb-thumb-w: clamp(3.5rem, 7.25vw, 5.25rem);
        --hb-thumb-h: clamp(5.25rem, 10.875vw, 7.875rem);
        --hb-thumb-gap: 0.4rem;
        --hb-gap-main: 0.5rem;
    }
}

/* 主册右侧：当前学术成果标题（来自条目 title，随轮换由 JS 写入） */
#news_bottom .home-news-zju-col__body--research-books .home-news-book-featured-caption {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    pointer-events: none;
    font-size: clamp(0.92rem, 0.82rem + 0.38vw, 1.08rem);
    font-weight: 600;
    line-height: 1.55;
    color: #1e293b;
    letter-spacing: 0.02em;
}

#news_bottom .home-news-zju-col__body--research-books .home-news-book-carousel__track.home-news-book-carousel--ready .home-news-book-featured-caption:empty {
    display: none;
}

#news_bottom .home-news-zju-col__body--research-books .home-news-book-carousel__track.home-news-book-carousel--ready .home-news-book-featured-caption {
    position: relative;
    width: 100%;
    flex: 1 0 100%;
    max-width: 22rem;
    margin-left: auto;
    margin-right: auto;
    margin-top: 1rem;
    padding: 0 0.65rem;
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 6;
    line-clamp: 6;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@media (min-width: 769px) {
    #news_bottom .home-news-zju-col__body--research-books .home-news-book-carousel__track.home-news-book-carousel--ready .home-news-book-featured-caption {
        position: absolute;
        left: calc(50% + (var(--hb-featured-w) / 2) + var(--hb-gap-main) + clamp(0.7rem, 2vw, 1.25rem));
        right: 0.35rem;
        bottom: calc(var(--hb-featured-pad-b) + (var(--hb-featured-h) * 0.5));
        transform: translateY(50%);
        width: auto;
        max-width: none;
        flex: none;
        margin: 0;
        padding: 0;
        text-align: left;
        -webkit-line-clamp: 5;
        line-clamp: 5;
        z-index: 4;
    }
}

#news_bottom .home-academic-track {
    --academic-c-size: 10px;
    position: relative;
    padding-left: 0.15rem;
    padding-right: 0.25rem;
}

#news_bottom .home-academic-card {
    position: relative;
    display: flex;
    align-items: stretch;
    margin-top: 0.75rem;
    padding-left: calc(var(--academic-c-size) + 12px);
    text-decoration: none;
    color: inherit;
    border-radius: 0;
    background: transparent;
    transition:
        background-color 0.25s ease,
        box-shadow 0.25s ease;
}

#news_bottom .home-academic-card:first-child {
    margin-top: 0.2rem;
}

#news_bottom .home-academic-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.15rem;
    width: var(--academic-c-size);
    height: var(--academic-c-size);
    border-radius: 50%;
    background: var(--hn-theme-mid);
    z-index: 1;
}

#news_bottom .home-academic-card::after {
    content: "";
    position: absolute;
    left: calc(var(--academic-c-size) * 0.25);
    top: calc(var(--academic-c-size) * 0.25 + 0.15rem);
    width: calc(var(--academic-c-size) * 0.5);
    height: calc(var(--academic-c-size) * 0.5);
    border-radius: 50%;
    background: #fff;
    z-index: 2;
}

#news_bottom .home-academic-card:hover {
    background: transparent;
    box-shadow: 0 2px 14px rgba(10, 3, 46, 0.1);
}

#news_bottom .home-academic-card__pic {
    flex-shrink: 0;
    width: 5.75rem;
    height: 8.1rem;
    max-height: 8.5rem;
    overflow: hidden;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

#news_bottom .home-academic-card__pic img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#news_bottom .home-academic-card__text {
    flex: 1;
    min-width: 0;
    margin-left: 0.85rem;
    padding: 0.1rem 0 0.15rem;
}

#news_bottom .home-academic-card__title-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.35rem 0.5rem;
    margin-bottom: 0.35rem;
}

#news_bottom .home-academic-card__title {
    margin: 0;
    flex: 1 1 12rem;
    min-width: 0;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.75;
    color: #1e293b;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    transition: color 0.25s ease;
}

#news_bottom .home-academic-card:hover .home-academic-card__title {
    color: var(--hn-theme-mid);
}

#news_bottom .home-academic-card__title-row .badge-new {
    flex-shrink: 0;
    margin-top: 0.15rem;
    animation: home-news-pulse 2s infinite;
}

#news_bottom .home-academic-card__rows {
    margin: 0.15rem 0 0;
    padding: 0;
    list-style: none;
    width: 100%;
    max-width: 95%;
}

#news_bottom .home-academic-card__row {
    position: relative;
    display: flex;
    align-items: flex-start;
    padding-left: 1.15rem;
    margin-top: 0.35rem;
    font-size: 0.875rem;
    line-height: 1.55;
    color: #64748b;
}

#news_bottom .home-academic-card__row:first-child {
    margin-top: 0.1rem;
}

#news_bottom .home-academic-card__row i {
    position: absolute;
    left: 0;
    top: 0.12rem;
    font-size: 0.72rem;
    color: var(--hn-theme-mid);
    width: 1em;
    text-align: center;
}

#news_bottom .home-academic-card__l {
    flex-shrink: 0;
    white-space: nowrap;
    color: #64748b;
}

#news_bottom .home-academic-card__r {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #475569;
}

/* 卡片条目：参考 zju .section2 .news .card-list .card-item */
#news_bottom .home-news-zju-card.news-item {
    display: flex;
    gap: 1rem;
    padding: 0.95rem 1rem 0.95rem 0.95rem;
    margin: 0;
    border-radius: 0;
    border: none;
    background: transparent;
    box-shadow: none;
    transition:
        box-shadow 0.3s ease,
        transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

#news_bottom .home-news-zju-card.news-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--hn-theme-mid) 0%, var(--hn-theme) 100%);
    border-radius: 0;
    z-index: 1;
    pointer-events: none;
}

#news_bottom .home-news-zju-card.news-item::after {
    content: "";
    position: absolute;
    inset: 0;
    left: 0;
    background: linear-gradient(105deg, var(--hn-theme) 0%, var(--hn-theme-mid) 42%, var(--hn-theme-light) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
    pointer-events: none;
}

#news_bottom a.home-news-zju-card.news-item--link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

#news_bottom .home-news-zju-card.news-item:hover {
    margin: 0;
    padding: 0.95rem 1rem 0.95rem 0.95rem;
    box-shadow: 0 8px 28px rgba(10, 3, 46, 0.18);
    transform: translateY(-2px);
}

#news_bottom .home-news-zju-card.news-item:hover::after {
    opacity: 1;
}

#news_bottom .home-news-zju-card .news-date-box,
#news_bottom .home-news-zju-card .news-content-wrap {
    position: relative;
    z-index: 2;
    transition:
        color 0.3s ease,
        background-color 0.3s ease;
}

#news_bottom .home-news-zju-card .news-date-box {
    flex-shrink: 0;
    width: 3.75rem;
    height: 3.75rem;
    background: linear-gradient(160deg, #f8fafc 0%, #eef2f7 100%);
    border: none;
    border-radius: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--hn-theme-mid);
}

#news_bottom .home-news-zju-card:hover .news-date-box {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}

#news_bottom .home-news-zju-card .news-date-day {
    font-size: 1.35rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.2rem;
}

#news_bottom .home-news-zju-card .news-date-year {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    opacity: 0.9;
}

#news_bottom .home-news-zju-card .news-content-wrap {
    flex: 1;
    min-width: 0;
}

#news_bottom .home-news-zju-card .news-title {
    font-size: 1.02rem;
    font-weight: 600;
    color: #1e293b;
    margin: 0 0 0.45rem;
    line-height: 1.45;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
}

#news_bottom .home-news-zju-card:hover .news-title {
    color: #fff;
}

#news_bottom .home-news-zju-card .news-summary {
    color: #64748b;
    font-size: 0.875rem;
    line-height: 1.62;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0 0 0.45rem;
}

#news_bottom .home-news-zju-card:hover .news-summary {
    color: rgba(255, 255, 255, 0.92);
}

#news_bottom .home-news-zju-card .news-meta {
    display: flex;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: #94a3b8;
}

#news_bottom .home-news-zju-card:hover .news-meta {
    color: rgba(255, 255, 255, 0.78);
}

#news_bottom .home-news-zju-card .news-tag {
    display: inline-block;
    padding: 0.15rem 0.45rem;
    background: rgba(22, 50, 104, 0.08);
    color: var(--hn-theme-mid);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 0;
}

#news_bottom .home-news-zju-card:hover .news-tag {
    background: rgba(255, 255, 255, 0.22);
    color: #fff;
}

#news_bottom .home-news-zju-card .badge-new {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.4rem;
    background: #ff4d4f;
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    border-radius: 0;
    margin-left: 0;
    animation: home-news-pulse 2s infinite;
}

@keyframes home-news-pulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.75;
    }
}

@media (max-width: 768px) {
    #news_bottom .home-news-zju-card.news-item {
        gap: 0.75rem;
        padding: 0.8rem 0.75rem;
    }

    #news_bottom .home-news-zju-card.news-item:hover {
        padding: 0.8rem 0.75rem;
    }

    #news_bottom .home-news-zju-card .news-date-box {
        width: 3.25rem;
        height: 3.25rem;
    }

    #news_bottom .home-news-zju-card .news-date-day {
        font-size: 1.15rem;
    }

    #news_bottom .home-news-zju-card .news-title {
        font-size: 0.95rem;
    }

    #news_bottom .home-news-zju-card .news-summary {
        font-size: 0.8125rem;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }

    #news_bottom .home-news-zju-col__head {
        flex-wrap: wrap;
        padding: 0.65rem 0.75rem;
    }

    #news_bottom .home-academic-card__pic {
        width: 4.5rem;
        height: 6.35rem;
        max-height: none;
    }

    #news_bottom .home-academic-card__text {
        margin-left: 0.65rem;
    }

    #news_bottom .home-academic-card__title {
        font-size: 0.92rem;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }

    #news_bottom .home-academic-card__row {
        font-size: 0.8125rem;
    }
}

#news_bottom .home-academic-track > .home-news-zju-empty {
    padding-left: 0.5rem;
    text-align: center;
}

/* —— 科研成果右栏：3D 书本轨道（.home-news-book-row__inner 为历史类名，与 copy.html 轮换脚本一致）—— */
#news_bottom .home-news-book-row__inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: clamp(1.25rem, 3vw, 2.75rem);
    perspective: 1200px;
    max-width: 100%;
}

/* 书本轮换：参考 copy.html 的 appendChild / prepend 轮换；主册放大、侧册缩略，比例保持 2:3 */
#news_bottom .home-news-book-carousel {
    position: relative;
    width: 100%;
}

#news_bottom .home-news-book-carousel__track.home-news-book-carousel--ready {
    display: block;
    position: relative;
    min-height: clamp(27rem, 60vw, 50rem);
    margin-left: auto;
    margin-right: auto;
    /* auto + visible 会在部分浏览器形成滚动容器并出现右侧纵条；改为 hidden，靠加高与内边距容纳内容与悬停放大 */
    overflow: hidden;
    padding-top: clamp(1.35rem, 4.5vw, 3rem);
    padding-bottom: 0;
    perspective: 1200px;
    /* 侧册 bottom；主册单独再上移一段（仅主册用 --hb-featured-pad-b） */
    --hb-carousel-pad-b: clamp(3.5rem, 9vw, 5.65rem);
    --hb-featured-pad-b: calc(var(--hb-carousel-pad-b) + clamp(1rem, 2.75vw, 2.35rem));
    --hb-featured-w: clamp(15.75rem, 38vw, 24rem);
    --hb-featured-h: clamp(23.625rem, 57vw, 36rem);
    --hb-thumb-w: clamp(5.25rem, 13vw, 7.5rem);
    --hb-thumb-h: clamp(7.875rem, 19.5vw, 11.25rem);
    --hb-thumb-gap: 0.55rem;
    --hb-gap-main: 0.85rem;
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book {
    margin: 0;
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-featured {
    position: absolute;
    left: 50%;
    top: auto;
    bottom: var(--hb-featured-pad-b);
    z-index: 2;
    width: var(--hb-featured-w);
    height: var(--hb-featured-h);
    transform: translateX(-50%);
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb {
    position: absolute;
    top: auto;
    bottom: var(--hb-carousel-pad-b);
    z-index: 1;
    width: var(--hb-thumb-w);
    height: var(--hb-thumb-h);
    transform: none;
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb[data-hb-thumb-i="0"] {
    left: calc(50% + (var(--hb-featured-w) / 2) + var(--hb-gap-main) + (var(--hb-thumb-w) + var(--hb-thumb-gap)) * 0);
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb[data-hb-thumb-i="1"] {
    left: calc(50% + (var(--hb-featured-w) / 2) + var(--hb-gap-main) + (var(--hb-thumb-w) + var(--hb-thumb-gap)) * 1);
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb[data-hb-thumb-i="2"] {
    left: calc(50% + (var(--hb-featured-w) / 2) + var(--hb-gap-main) + (var(--hb-thumb-w) + var(--hb-thumb-gap)) * 2);
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb[data-hb-thumb-i="3"] {
    left: calc(50% + (var(--hb-featured-w) / 2) + var(--hb-gap-main) + (var(--hb-thumb-w) + var(--hb-thumb-gap)) * 3);
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-off {
    position: absolute;
    left: -9999px;
    top: 0;
    width: var(--hb-thumb-w);
    height: var(--hb-thumb-h);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-featured:hover {
    transform: translate(calc(-50% + clamp(0.5rem, 2vw, 1.25rem)), 0);
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover {
    transform: translateY(calc(-1 * clamp(0.35rem, 1.5vw, 0.85rem)));
}

@media (max-width: 767.98px) {
    #news_bottom .home-news-book-carousel__track.home-news-book-carousel--ready {
        display: flex;
        flex-wrap: wrap;
        flex-direction: row;
        justify-content: center;
        align-items: flex-end;
        align-content: flex-start;
        min-height: 0;
        overflow-x: clip;
        gap: 0.55rem;
        padding-top: 0.35rem;
        padding-bottom: 0;
        transform: none;
        --hb-featured-w: min(12.5rem, 72vw);
        --hb-featured-h: min(18.75rem, 108vw);
        --hb-thumb-w: clamp(3.75rem, 22vw, 5.25rem);
        --hb-thumb-h: clamp(5.6rem, 33vw, 7.875rem);
    }

    #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-featured {
        position: relative;
        left: auto;
        top: auto;
        flex: 1 0 100%;
        display: flex;
        justify-content: center;
        width: var(--hb-featured-w);
        height: var(--hb-featured-h);
        max-width: 100%;
        transform: none;
    }

    #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-featured:hover,
    #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover {
        transform: none;
    }

    #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb {
        position: relative;
        left: auto !important;
        top: auto;
        flex: 0 0 auto;
        transform: none;
    }
}

#news_bottom .home-achievement-book {
    transform-style: preserve-3d;
    position: relative;
    width: clamp(7rem, 18vw, 10.5rem);
    height: clamp(10.5rem, 27vw, 15.75rem);
    flex: 0 0 auto;
    text-decoration: none;
    color: inherit;
    backface-visibility: visible;
    transition: transform 0.2s ease;
}

#news_bottom .home-achievement-book:hover {
    transform: translateX(clamp(0.5rem, 2vw, 1.25rem));
}

#news_bottom .home-achievement-book__layer {
    transform-style: preserve-3d;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    transform-origin: left center;
    transition:
        transform 0.5s ease-in-out,
        box-shadow 0.35s ease-in-out;
}

#news_bottom .home-achievement-book:hover .home-achievement-book__layer {
    box-shadow: 0 1em 3em 0 rgba(0, 0, 0, 0.2);
}

#news_bottom .home-achievement-book__front,
#news_bottom .home-achievement-book__back {
    background-image: var(--hb-cover);
    background-size: cover;
    background-position: center bottom;
    background-repeat: no-repeat;
}

#news_bottom .home-achievement-book__page--l {
    border-bottom-right-radius: 0.5em;
    border-top-right-radius: 0.5em;
    background: #f5f5f5;
}

#news_bottom .home-achievement-book__page--r {
    border-bottom-right-radius: 0.5em;
    border-top-right-radius: 0.5em;
    background: #f5f5f5;
}

#news_bottom .home-achievement-book__page--detail {
    background-color: #f5f5f5;
    background-image: var(--hb-detail);
    background-size: cover;
    background-position: center bottom;
    background-repeat: no-repeat;
}

#news_bottom .home-achievement-book:hover .home-achievement-book__front {
    transform: rotateY(-160deg) scale(1.08);
}

#news_bottom .home-achievement-book:hover .home-achievement-book__page--1 {
    transform: rotateY(-150deg) scale(1.08);
}

#news_bottom .home-achievement-book:hover .home-achievement-book__page--2 {
    transform: rotateY(-30deg) scale(1.08);
}

#news_bottom .home-achievement-book:hover .home-achievement-book__page--3 {
    transform: rotateY(-140deg) scale(1.08);
}

#news_bottom .home-achievement-book:hover .home-achievement-book__page--4 {
    transform: rotateY(-40deg) scale(1.08);
}

#news_bottom .home-achievement-book:hover .home-achievement-book__page--5 {
    transform: rotateY(-130deg) scale(1.08);
}

#news_bottom .home-achievement-book:hover .home-achievement-book__page--6 {
    transform: rotateY(-50deg) scale(1.08);
}

#news_bottom .home-achievement-book:hover .home-achievement-book__back {
    transform: rotateY(-20deg) scale(1.08);
}

/* 轮换侧册：悬停仅轻微平移整书，不触发内页 3D 翻页（避免误触预览与点击抢主册冲突） */
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__layer {
    box-shadow: none;
}

#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__front,
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__page--1,
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__page--2,
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__page--3,
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__page--4,
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__page--5,
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__page--6,
#news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover .home-achievement-book__back {
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    #news_bottom .home-achievement-book,
    #news_bottom .home-achievement-book__layer {
        transition-duration: 0.01ms;
    }

    #news_bottom .home-achievement-book:hover {
        transform: none;
    }

    /* 轮换布局下保留主册/侧册定位，仅去掉平移强调（与翻页层 transform: none 一致） */
    #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-featured:hover {
        transform: translateX(-50%);
    }

    #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover {
        transform: none;
    }

    @media (max-width: 768px) {
        #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-featured:hover,
        #news_bottom .home-news-book-carousel--ready .home-achievement-book.is-hb-thumb:hover {
            transform: none;
        }
    }

    #news_bottom .home-achievement-book:hover .home-achievement-book__front,
    #news_bottom .home-achievement-book:hover .home-achievement-book__page--1,
    #news_bottom .home-achievement-book:hover .home-achievement-book__page--2,
    #news_bottom .home-achievement-book:hover .home-achievement-book__page--3,
    #news_bottom .home-achievement-book:hover .home-achievement-book__page--4,
    #news_bottom .home-achievement-book:hover .home-achievement-book__page--5,
    #news_bottom .home-achievement-book:hover .home-achievement-book__page--6,
    #news_bottom .home-achievement-book:hover .home-achievement-book__back {
        transform: none;
    }

    #news_bottom .home-achievement-book:hover .home-achievement-book__layer {
        box-shadow: none;
    }
}