/* ============================================================
   科研文献辅助系统 · 学术风格样式
   靛蓝 + 灰白 + 衬线标题
   ============================================================ */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ink: #1B3A5C;
    --ink-dark: #142C46;
    --accent: #8C2D2D;
    --text: #2C3440;
    --sub: #6B7280;
    --line: #E3E6EB;
    --bg: #F7F8FA;
    --white: #FFFFFF;
    --serif: "Source Han Serif SC", "Noto Serif SC", "SimSun", "宋体", Georgia, serif;
    --sans: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

body {
    font-family: var(--sans);
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--ink);
    text-decoration: none;
}

    a:hover {
        color: var(--accent);
    }

img {
    max-width: 100%;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- 顶栏 ---------- */
.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 62px;
    gap: 20px;
}

.brand a {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.brand-mark {
    font-family: var(--serif);
    font-size: 22px;
    color: var(--ink);
    letter-spacing: 2px;
    font-weight: 700;
}

.brand-sub {
    font-size: 13px;
    color: var(--sub);
    letter-spacing: 3px;
}

.main-nav {
    display: flex;
    gap: 4px;
}

    .main-nav a {
        display: block;
        padding: 20px 16px 18px;
        font-size: 15px;
        color: #3E4A5C;
        border-bottom: 3px solid transparent;
        transition: color .15s, border-color .15s;
    }

        .main-nav a:hover {
            color: var(--ink);
        }

        .main-nav a.active {
            color: var(--ink);
            font-weight: 700;
            border-bottom-color: var(--ink);
        }

/* ---------- 主体 ---------- */
.main {
    padding: 24px 20px 48px;
    min-height: 60vh;
}

/* ---------- 检索框 ---------- */
.search-hero {
    background: linear-gradient(180deg, #F9FAFC 0%, #FFFFFF 100%);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 32px 28px;
    margin-bottom: 24px;
}

    .search-hero h1 {
        font-family: var(--serif);
        font-size: 24px;
        font-weight: 400;
        color: var(--ink);
        letter-spacing: 3px;
        margin-bottom: 6px;
    }

    .search-hero .sub {
        font-size: 13px;
        color: var(--sub);
        margin-bottom: 20px;
    }

.search-form {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

    .search-form input[type=text] {
        flex: 1;
        min-width: 260px;
        padding: 11px 14px;
        font-size: 15px;
        font-family: var(--sans);
        border: 1px solid #CFD6E0;
        border-radius: 4px;
        background: #FFF;
    }

        .search-form input[type=text]:focus {
            outline: none;
            border-color: var(--ink);
        }

    .search-form select {
        padding: 11px 10px;
        font-size: 14px;
        font-family: var(--sans);
        border: 1px solid #CFD6E0;
        border-radius: 4px;
        background: #FFF;
        color: var(--text);
    }

.btn {
    display: inline-block;
    padding: 11px 26px;
    background: var(--ink);
    color: #FFF !important;
    border: none;
    border-radius: 4px;
    font-size: 15px;
    font-family: var(--sans);
    cursor: pointer;
    letter-spacing: 2px;
    transition: background .15s;
}

    .btn:hover {
        background: var(--ink-dark);
    }

.btn-sm {
    padding: 7px 14px;
    font-size: 13px;
    letter-spacing: 0;
}

.btn-plain {
    background: #FFF;
    color: var(--ink) !important;
    border: 1px solid #CFD6E0;
}

    .btn-plain:hover {
        background: #F2F5F9;
    }

/* ---------- 首页统计卡 ---------- */
.stat-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.stat-card {
    flex: 1;
    min-width: 160px;
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 18px 20px;
}

.stat-num {
    font-family: var(--serif);
    font-size: 30px;
    color: var(--ink);
    line-height: 1.2;
    font-weight: 700;
}

.stat-label {
    font-size: 13px;
    color: var(--sub);
    margin-top: 4px;
}

/* ---------- 检索页两栏 ---------- */
.search-layout {
    display: flex;
    gap: 22px;
    align-items: flex-start;
}

.facet {
    width: 210px;
    flex-shrink: 0;
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 4px 0;
}

.facet-group {
    border-bottom: 1px solid var(--line);
    padding: 14px 18px;
}

    .facet-group:last-child {
        border-bottom: none;
    }

.facet-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.facet-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 0;
    font-size: 13px;
    color: #4A5666;
}

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

    .facet-item.on {
        color: var(--accent);
        font-weight: 700;
    }

    .facet-item .cnt {
        color: #A8B0BC;
        font-size: 12px;
    }

.result-main {
    flex: 1;
    min-width: 0;
}

/* ---------- 结果统计条 ---------- */
.result-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 12px 18px;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 10px;
}

    .result-bar .cnt-num {
        font-family: var(--serif);
        color: var(--accent);
        font-size: 18px;
        font-weight: 700;
    }

    .result-bar .tools {
        display: flex;
        gap: 10px;
        align-items: center;
        font-size: 13px;
        color: var(--sub);
    }

/* ---------- 文献条目 ---------- */
.doc-list {
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.doc-item {
    padding: 18px 20px;
    border-bottom: 1px solid #EEF1F5;
}

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

    .doc-item:hover {
        background: #FCFDFE;
    }

.doc-title {
    font-family: var(--serif);
    font-size: 17px;
    line-height: 1.6;
    margin-bottom: 8px;
    font-weight: 400;
}

    .doc-title a {
        color: var(--ink);
    }

        .doc-title a:hover {
            color: var(--accent);
        }

.doc-meta {
    font-size: 12.5px;
    color: var(--sub);
    margin-bottom: 8px;
}

    .doc-meta span {
        margin-right: 16px;
    }

    .doc-meta .src {
        color: #8A94A3;
    }

.doc-summary {
    font-size: 13.5px;
    color: #5A6472;
    line-height: 1.85;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.doc-actions {
    margin-top: 10px;
    font-size: 12.5px;
}

    .doc-actions a {
        color: var(--sub);
        margin-right: 16px;
    }

        .doc-actions a:hover {
            color: var(--accent);
        }

mark {
    background: #FFF3C4;
    color: #7A4B00;
    padding: 0 1px;
    border-radius: 2px;
}

/* ---------- 分页 ---------- */
.pager {
    text-align: center;
    margin-top: 22px;
    padding: 6px 0;
}

    .pager a, .pager span {
        display: inline-block;
        min-width: 34px;
        padding: 6px 10px;
        margin: 0 2px;
        border: 1px solid var(--line);
        border-radius: 3px;
        font-size: 13px;
        color: #4A5666;
        background: #FFF;
    }

        .pager a:hover {
            border-color: var(--ink);
            color: var(--ink);
        }

    .pager .cur {
        background: var(--ink);
        color: #FFF;
        border-color: var(--ink);
        font-weight: 700;
    }

    .pager .gap {
        border: none;
        background: none;
        color: #A8B0BC;
    }

    .pager .info {
        border: none;
        background: none;
        color: var(--sub);
        font-size: 12.5px;
        margin-left: 10px;
    }

/* ---------- 详情页 ---------- */
.detail-layout {
    display: flex;
    gap: 22px;
    align-items: flex-start;
}

.article-sheet {
    flex: 1;
    min-width: 0;
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 40px 48px 48px;
}

.article-h1 {
    font-family: var(--serif);
    font-size: 24px;
    line-height: 1.6;
    font-weight: 400;
    color: var(--ink);
    text-align: center;
    letter-spacing: 1px;
    margin-bottom: 18px;
}

.article-metabar {
    font-size: 13px;
    color: var(--sub);
    text-align: center;
    padding-bottom: 18px;
    margin-bottom: 26px;
    border-bottom: 1px solid var(--line);
}

    .article-metabar span {
        margin: 0 10px;
    }

.article-body {
    font-family: var(--serif);
    font-size: 17px;
    line-height: 2.05;
    color: #22282F;
}

    .article-body p {
        margin-bottom: 14px;
        text-indent: 2em;
    }

        .article-body p:empty {
            display: none;
        }

    .article-body img {
        display: block;
        margin: 16px auto;
        max-width: 100%;
    }

    .article-body table {
        border-collapse: collapse;
        margin: 16px auto;
        max-width: 100%;
    }

    .article-body td, .article-body th {
        border: 1px solid var(--line);
        padding: 6px 10px;
        font-size: 15px;
    }

    .article-body blockquote {
        background: #F7F9FC;
        border-left: 3px solid var(--ink);
        padding: 12px 16px;
        margin: 16px 0;
        font-size: 16px;
    }

    .article-body h2, .article-body h3 {
        font-family: var(--serif);
        color: var(--ink);
        font-weight: 700;
        margin: 22px 0 12px;
        font-size: 18px;
    }

/* ---------- 详情侧栏 ---------- */
.detail-side {
    width: 260px;
    flex-shrink: 0;
}

.side-box {
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 16px 18px;
    margin-bottom: 14px;
}

    .side-box h4 {
        font-size: 13px;
        color: var(--ink);
        letter-spacing: 1px;
        font-weight: 700;
        margin-bottom: 10px;
        padding-bottom: 8px;
        border-bottom: 1px solid var(--line);
    }

.meta-list {
    font-size: 13px;
}

    .meta-list dt {
        color: var(--sub);
        margin-top: 8px;
    }

    .meta-list dd {
        color: var(--text);
        word-break: break-all;
    }

.attach-list {
    list-style: none;
    font-size: 13px;
}

    .attach-list li {
        padding: 6px 0;
        border-bottom: 1px dotted #EEF1F5;
    }

        .attach-list li:last-child {
            border-bottom: none;
        }

    .attach-list .type {
        display: inline-block;
        min-width: 38px;
        padding: 0 5px;
        background: #EEF2F7;
        color: var(--ink);
        font-size: 11px;
        border-radius: 2px;
        margin-right: 6px;
        text-align: center;
    }

/* ---------- 首页最新入库 ---------- */
.panel {
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
    margin-bottom: 20px;
}

.panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid var(--line);
}

    .panel-head h2 {
        font-family: var(--serif);
        font-size: 17px;
        font-weight: 400;
        color: var(--ink);
        letter-spacing: 2px;
    }

    .panel-head .more {
        font-size: 13px;
        color: var(--sub);
    }

.panel-body {
    padding: 6px 20px 14px;
}

.plain-list {
    list-style: none;
}

    .plain-list li {
        display: flex;
        justify-content: space-between;
        align-items: baseline;
        gap: 16px;
        padding: 9px 0;
        border-bottom: 1px solid #F2F4F8;
        font-size: 14px;
    }

        .plain-list li:last-child {
            border-bottom: none;
        }

        .plain-list li a {
            flex: 1;
            color: #2F3A49;
        }

            .plain-list li a:hover {
                color: var(--accent);
            }

    .plain-list .date {
        font-size: 12.5px;
        color: #A8B0BC;
        white-space: nowrap;
    }

/* ---------- 统计页 ---------- */
.bar-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 5px 0;
    font-size: 13px;
}

    .bar-row .name {
        width: 140px;
        flex-shrink: 0;
        color: #4A5666;
    }

    .bar-row .bar {
        flex: 1;
        height: 16px;
        background: #EEF2F7;
        border-radius: 2px;
        overflow: hidden;
    }

        .bar-row .bar i {
            display: block;
            height: 100%;
            background: var(--ink);
            opacity: .75;
        }

    .bar-row .val {
        width: 60px;
        text-align: right;
        color: var(--sub);
        flex-shrink: 0;
    }

/* ---------- 空状态 ---------- */
.empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--sub);
    background: #FFF;
    border: 1px solid var(--line);
    border-radius: 6px;
}

    .empty .big {
        font-family: var(--serif);
        font-size: 20px;
        color: var(--ink);
        margin-bottom: 10px;
    }

/* ---------- 面包屑 ---------- */
.crumb {
    font-size: 13px;
    color: var(--sub);
    margin-bottom: 14px;
}

    .crumb a {
        color: var(--sub);
    }

        .crumb a:hover {
            color: var(--accent);
        }

    .crumb .sep {
        margin: 0 6px;
        color: #C9D0DA;
    }

/* ---------- 页脚 ---------- */
.site-footer {
    border-top: 1px solid var(--line);
    background: #FFF;
    padding: 22px 0;
    margin-top: 20px;
    font-size: 12.5px;
    color: var(--sub);
    text-align: center;
    line-height: 2;
}

    .site-footer .note {
        color: #A8B0BC;
        font-size: 12px;
    }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .search-layout, .detail-layout {
        flex-direction: column;
    }

    .facet, .detail-side {
        width: 100%;
    }

    .article-sheet {
        padding: 24px 20px;
    }

    .article-h1 {
        font-size: 20px;
    }

    .article-body {
        font-size: 16px;
    }

    .main-nav a {
        padding: 16px 10px 14px;
        font-size: 14px;
    }

    .brand-sub {
        display: none;
    }
}
/* 窄侧栏内的文献列表：标题独占一行，日期另起一行 */
/* （260px 侧栏放不下"长标题 + 日期"同一行，必须堆叠） */
.plain-list-stack li {
    display: block;
}

    .plain-list-stack li a {
        display: -webkit-box;
        -webkit-line-clamp: 2; /* 最多 2 行 */
        -webkit-box-orient: vertical;
        overflow: hidden;
        line-height: 1.65;
    }

.plain-list-stack .date {
    display: block;
    margin-top: 3px;
    font-size: 12px;
    color: #A8B0BC;
}
/* 专栏/专题名（标题上方） */
.article-subtitle {
    font-family: var(--serif);
    font-size: 15px;
    color: #8A94A3;
    text-align: center;
    letter-spacing: 2px;
    margin-bottom: 8px;
}
.article-body .origin-line {
    text-indent: 0;
    font-family: var(--sans);
    font-size: 13px;
    color: var(--sub);
    padding-bottom: 12px;
    margin-bottom: 18px;
    border-bottom: 1px dashed var(--line);
    text-align:center;
    color:#666;
}

/* ---------- 打印（研究者常打印文献） ---------- */
@media print {
    .site-header, .site-footer, .detail-side, .pager, .doc-actions {
        display: none !important;
    }

    .article-sheet {
        border: none;
        padding: 0;
    }

    .article-body {
        font-size: 12pt;
        line-height: 1.8;
    }

    body {
        background: #FFF;
    }
}