.standard-detail-page {
    padding: 32px 0 56px;
}

/* =========================
   页面布局
========================= */
.standard-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 24px;
    align-items: start;
}

.standard-main {
    min-width: 0;
}

.standard-sidebar {
    position: sticky;
    top: 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* =========================
   主体卡片
========================= */
.standard-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 34px;
    max-width: 100%;
}

/* =========================
   面包屑
========================= */
.breadcrumb {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 18px;
}

.breadcrumb a {
    color: #2563eb;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    margin-right: 6px;
}

/* =========================
   标题区
========================= */
.standard-title,
.standard-card h1 {
    font-size: 34px;
    line-height: 1.35;
    color: #111827;
    margin: 0 0 12px;
    font-weight: 700;
}

.standard-subtitle {
    color: #4b5563;
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: 18px;
}

.standard-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    color: #6b7280;
    font-size: 14px;
    margin-bottom: 26px;
}

.standard-meta span {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 999px;
    padding: 4px 10px;
}

/* =========================
   摘要
========================= */
.standard-summary,
.summary-box {
    background: #f8fafc;
    border-left: 4px solid #2563eb;
    padding: 18px 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    color: #374151;
    line-height: 1.85;
}

.standard-summary h2 {
    font-size: 18px;
    color: #111827;
    margin: 0 0 10px;
}

.standard-summary p {
    margin: 0;
    color: #374151;
    font-size: 15px;
    line-height: 1.9;
}

/* =========================
   封面图
========================= */
.standard-cover {
    margin: 24px 0 30px;
}

.standard-cover img {
    width: 100%;
    max-height: 420px;
    object-fit: contain;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    background: #f9fafb;
}

/* =========================
   正文内容
========================= */
.standard-body {
    margin-top: 26px;
}

.content-section {
    margin-top: 34px;
    padding-top: 4px;
}

.content-section:first-child {
    margin-top: 0;
}

.content-section h2,
.rich-content h2 {
    font-size: 22px;
    color: #111827;
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e5e7eb;
    font-weight: 700;
}

.content-section h2::before,
.rich-content h2::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 18px;
    background: #2563eb;
    border-radius: 3px;
    margin-right: 10px;
    vertical-align: -3px;
}

.text-content,
.content-body,
.rich-content {
    color: #1f2937;
    font-size: 16px;
    line-height: 2;
    letter-spacing: 0.01em;
}

.text-content br {
    line-height: 2.2;
}

.text-content p,
.content-body p,
.rich-content p {
    margin: 12px 0;
}

.content-body h3,
.rich-content h3 {
    font-size: 19px;
    margin: 24px 0 10px;
    color: #111827;
}

.content-body ul,
.content-body ol,
.rich-content ul,
.rich-content ol {
    padding-left: 24px;
    margin: 12px 0;
}

.content-body li,
.rich-content li {
    margin: 6px 0;
}

.content-body table,
.rich-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 18px 0;
}

.content-body table th,
.content-body table td,
.rich-content table th,
.rich-content table td {
    border: 1px solid #e5e7eb;
    padding: 10px;
}

.content-body table th,
.rich-content table th {
    background: #f9fafb;
    color: #111827;
}

.content-body img,
.rich-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* =========================
   侧边栏
========================= */
.side-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 18px;
}

.side-card h3 {
    font-size: 18px;
    color: #111827;
    margin: 0 0 14px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #f3f4f6;
    font-size: 14px;
}

.info-row:last-child {
    border-bottom: none;
}

.info-row span {
    color: #6b7280;
    white-space: nowrap;
}

.info-row strong {
    color: #111827;
    text-align: right;
    font-weight: 500;
    word-break: break-word;
}

/* =========================
   标准文件说明 / 版权提示
========================= */
.copyright-notice {
    margin: 0;
    color: #6b7280;
    font-size: 14px;
    line-height: 1.8;
}

.pdf-btn {
    display: block;
    margin-top: 14px;
    text-align: center;
    background: #2563eb;
    color: #fff;
    text-decoration: none;
    padding: 11px 14px;
    border-radius: 8px;
    font-size: 15px;
}

.pdf-btn:hover {
    background: #1d4ed8;
}

/* 兼容旧结构 */
.pdf-download-box {
    margin-top: 28px;
    padding: 18px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
}

.pdf-download-box a {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    padding: 10px 18px;
    border-radius: 6px;
    text-decoration: none;
}

.pdf-download-box a:hover {
    background: #1d4ed8;
}

/* =========================
   标签
========================= */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-list span {
    display: inline-block;
    background: #eff6ff;
    color: #2563eb;
    padding: 5px 9px;
    border-radius: 999px;
    font-size: 13px;
}

/* =========================
   相关内容
========================= */
.related-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.related-list a {
    display: block;
    padding: 12px 14px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    color: #374151;
    text-decoration: none;
    line-height: 1.6;
}

.related-list a:hover {
    color: #2563eb;
    border-color: #2563eb;
}

.empty {
    color: #9ca3af;
    font-size: 14px;
}

/* =========================
   移动端
========================= */
@media (max-width: 900px) {

    .standard-detail-page {
        padding: 22px 0 40px;
    }

    .standard-layout {
        grid-template-columns: 1fr;
    }

    .standard-sidebar {
        position: static;
    }

    .standard-card {
        padding: 22px;
    }

    .standard-title,
    .standard-card h1 {
        font-size: 26px;
    }

    .standard-subtitle {
        font-size: 15px;
    }

    .related-list {
        grid-template-columns: 1fr;
    }

}