/* ==========================================================================
   818黑料网 · 全站样式表
   数据新闻风：墨蓝主色 / 信号红强调 / 纸张灰背景
   ========================================================================== */

/* ==========================================================================
   Base —— 基础变量、重置、全局排版
   ========================================================================== */

:root {
  --color-primary: #0f2440;
  --color-accent: #c8102e;
  --color-bg: #f5f3ee;
  --color-card: #ffffff;
  --color-muted: #5c6b7a;
  --color-success: #2f6b4f;
  --color-border: #e2ddd4;
  --color-text: #1e2a38;
  --font-serif: "Songti SC", "SimSun", "Noto Serif SC", Georgia, serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --container-width: 1200px;
  --space-unit: 32px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --header-height: 72px;
  --header-height-inner: 60px;
  --transition-base: 0.2s ease;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 26px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

/* 数字与版本号使用等宽字体 */
.status-tag,
.step-num,
.field-type,
.error-code,
.record-table td:first-child,
.update-item .status-tag {
  font-family: var(--font-mono);
}

/* ==========================================================================
   Layout —— 容器、栅格、全站骨架
   ========================================================================== */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
}

.header-inner,
.breadcrumb-inner,
.hero,
.status-strip,
.catalog-overview,
.update-and-related,
.usage-preview,
.cooperation-steps,
.faq-preview,
.footer-inner,
.footer-bottom,
.page-header,
.page-title-inner,
.layout-shell,
.page-layout,
.record-intro,
.record-fields,
.version-timeline,
.check-paths,
.related-links,
.responsibility-inner,
.rule-principles,
.prohibited-list,
.catalog-intro,
.catalog-table-section,
.field-definition-section,
.update-note-section,
.usage-prereq,
.usage-scene,
.usage-conclusion,
.source-notes,
.faq-group,
.faq-fallback,
.faq-image-section {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   Components —— 通用组件
   ========================================================================== */

/* ---------- 按钮 ---------- */

.btn-primary,
.btn-secondary,
.error-btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #a30d24;
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

/* ---------- 状态标签 ---------- */

.status-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}

.status-green {
  background-color: rgba(47, 107, 79, 0.12);
  color: var(--color-success);
}

.status-blue {
  background-color: rgba(15, 36, 64, 0.08);
  color: var(--color-primary);
}

.status-red {
  background-color: rgba(200, 16, 46, 0.1);
  color: var(--color-accent);
}

/* ---------- 卡片链接 ---------- */

.card-link,
.text-link,
.related-link,
.related-links-item {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

.card-link::after,
.text-link::after,
.related-links-item::after {
  content: " →";
  font-family: var(--font-sans);
}

/* ---------- 步骤流程 ---------- */

.step-item {
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

/* ---------- 表格 ---------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.data-table th {
  background-color: var(--color-primary);
  color: #ffffff;
  font-weight: 600;
  font-family: var(--font-sans);
  white-space: nowrap;
}

.data-table tbody tr:nth-child(even) {
  background-color: #faf9f6;
}

.data-table tbody tr:hover {
  background-color: rgba(15, 36, 64, 0.04);
}

.table-scroll-wrap,
.field-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
}

/* ---------- 编辑正文区 ---------- */

.edit-block {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 24px;
}

.edit-block p:last-child {
  margin-bottom: 0;
}

/* ---------- 来源注释 ---------- */

.source-note {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  padding: 8px 16px;
  background-color: rgba(15, 36, 64, 0.04);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  cursor: pointer;
  transition: background-color var(--transition-base);
}

.source-note:hover {
  background-color: rgba(15, 36, 64, 0.08);
}

/* ---------- 分段结论 ---------- */

.split-conclusion {
  background-color: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 28px 32px;
  margin: 32px 0;
}

.split-conclusion h2,
.split-conclusion h3 {
  color: #ffffff;
}

.split-conclusion p {
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- 问答手风琴 ---------- */

.accordion-item,
.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.accordion-item summary,
.faq-item summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: background-color var(--transition-base);
}

.accordion-item summary::-webkit-details-marker,
.faq-item summary::-webkit-details-marker {
  display: none;
}

.accordion-item summary::after,
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition-base);
}

.accordion-item[open] summary::after,
.faq-item[open] summary::after {
  content: "−";
  transform: translateY(-50%);
}

.accordion-item summary:hover,
.faq-item summary:hover {
  background-color: rgba(15, 36, 64, 0.03);
}

.accordion-item p,
.faq-answer {
  padding: 0 24px 18px;
  font-size: 15px;
  color: var(--color-muted);
}

/* ---------- 相关入口 ---------- */

.related-entry {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-entry li a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.related-entry li a:hover {
  border-color: var(--color-primary);
  background-color: rgba(15, 36, 64, 0.03);
}

/* ---------- 时间线 ---------- */

.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 24px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-card);
}

/* ---------- 定义列表 ---------- */

.definition-list {
  display: grid;
  gap: 16px;
}

.def-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.def-item dt {
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.field-type {
  display: inline-block;
  font-size: 13px;
  color: var(--color-accent);
  background-color: rgba(200, 16, 46, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.field-example {
  font-size: 14px;
  color: var(--color-muted);
  background-color: rgba(15, 36, 64, 0.04);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-top: 8px;
  margin-bottom: 0;
}

/* ---------- 图片容器 ---------- */

figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

figcaption {
  font-size: 13px;
  color: var(--color-muted);
  text-align: center;
  padding: 8px 0 0;
  line-height: 1.5;
}

/* ==========================================================================
   Pages —— 页面级样式
   ========================================================================== */

/* ---------- 页头 ---------- */

.site-header {
  background-color: var(--color-primary);
  position: relative;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-height);
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.brand-tagline {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.3;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list li {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
  position: relative;
}

.nav-link:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-link.is-current {
  color: #ffffff;
  font-weight: 600;
}

.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background-color: var(--color-accent);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ---------- 面包屑 ---------- */

.breadcrumb {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 12px;
  padding-bottom: 12px;
  font-size: 14px;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-muted);
}

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

.breadcrumb-sep {
  color: var(--color-border);
  margin: 0 2px;
}

.breadcrumb-current {
  color: var(--color-primary);
  font-weight: 600;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-muted);
}

.breadcrumb-list li a {
  color: var(--color-muted);
}

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

/* ---------- 页面标题区 ---------- */

.page-header {
  padding-top: 40px;
  padding-bottom: 8px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.25;
}

.page-title-block {
  padding-top: 8px;
  padding-bottom: 32px;
}

.page-title-block p,
.page-title-inner p,
.page-intro,
.page-lead,
.page-title-desc {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 720px;
  line-height: 1.7;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  margin-top: 64px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 40px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col h3 {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-base);
  display: inline-block;
  padding: 2px 0;
}

.footer-col ul a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  padding-bottom: 20px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ---------- 首页 ---------- */

/* Hero 区 */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 64px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero h1 {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 0;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 0;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-figure {
  width: 100%;
  max-width: 480px;
}

.hero-figure img {
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(15, 36, 64, 0.12);
}

/* 数据状态条 */
.status-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 32px;
  padding-bottom: 32px;
}

.status-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.status-item .status-tag {
  flex-shrink: 0;
}

.status-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 区块标题 */
.section-heading {
  margin-bottom: 32px;
}

.section-heading h2 {
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 640px;
}

/* 数据目录概览 */
.catalog-overview {
  padding-top: 48px;
  padding-bottom: 48px;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.catalog-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.catalog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(15, 36, 64, 0.08);
  border-color: var(--color-primary);
}

.catalog-card h3 {
  margin-bottom: 12px;
  font-size: 18px;
}

.catalog-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* 更新记录与相关入口 */
.update-and-related {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 48px;
  padding-top: 48px;
  padding-bottom: 48px;
}

.update-block h2 {
  margin-bottom: 8px;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
  margin-bottom: 24px;
}

.update-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.update-item .status-tag {
  margin-bottom: 8px;
}

.update-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.update-item p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.related-panel {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.related-panel h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-list li a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.related-list li a:hover {
  border-color: var(--color-primary);
  background-color: rgba(15, 36, 64, 0.04);
}

/* 使用示例预览 */
.usage-preview {
  padding-top: 48px;
  padding-bottom: 48px;
}

.usage-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.usage-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.usage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(15, 36, 64, 0.08);
}

.usage-figure img {
  aspect-ratio: 16 / 9;
  border-radius: 0;
}

.usage-card h3 {
  padding: 20px 24px 8px;
  font-size: 18px;
}

.usage-card p {
  padding: 0 24px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.usage-card .card-link {
  display: inline-block;
  margin: 0 24px 20px;
}

/* 合作流程 */
.cooperation-steps {
  padding-top: 48px;
  padding-bottom: 48px;
}

.steps-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.steps-flow .step-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.steps-flow .step-item h3 {
  margin-bottom: 8px;
}

.steps-flow .step-item p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* FAQ 预览 */
.faq-preview {
  padding-top: 48px;
  padding-bottom: 48px;
}

.faq-preview .text-link {
  display: inline-block;
  margin-top: 16px;
}

/* ---------- 内页通用 ---------- */

.inner-main {
  padding-top: 0;
  padding-bottom: 48px;
}

/* 内页面包屑（main 内） */
.inner-main > .breadcrumb {
  background: transparent;
  border-bottom: none;
}

.inner-main > .breadcrumb .breadcrumb-inner {
  padding-top: 20px;
  padding-bottom: 0;
}

/* 页面标题 */
.page-header {
  display: flex;
  align-items: center;
  min-height: 72px;
}

/* 页面布局壳 */
.layout-shell {
  padding-top: 32px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: start;
}

/* 服务页 */
.service-intro {
  margin-bottom: 32px;
}

.service-intro h2 {
  margin-bottom: 8px;
}

.service-intro p {
  color: var(--color-muted);
  font-size: 15px;
}

.service-matrix {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}

.service-group {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.service-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 24px;
  background-color: rgba(15, 36, 64, 0.04);
  border-bottom: 1px solid var(--color-border);
}

.group-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(200, 16, 46, 0.08);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
}

.entry-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

.service-group-body {
  padding: 20px 24px;
}

.service-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.service-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.entry-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.service-figure {
  margin-bottom: 40px;
}

.service-figure img {
  aspect-ratio: 16 / 6;
}

.delivery-steps {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.delivery-steps h2 {
  margin-bottom: 8px;
}

.delivery-steps > p {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.step-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  list-style: none;
  counter-reset: step-counter;
}

.step-flow .step-item {
  padding: 20px;
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
}

.step-flow .step-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-flow .step-item p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.bottom-note {
  background-color: rgba(200, 16, 46, 0.06);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-top: 32px;
}

.bottom-note p {
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 0;
  line-height: 1.6;
}

.bottom-note a {
  color: var(--color-accent);
  font-weight: 600;
}

/* 服务侧栏 */
.service-aside {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: sticky;
  top: 24px;
}

.service-aside h3 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

/* ---------- 数据目录页 ---------- */

.catalog-intro {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: center;
  padding-top: 8px;
  padding-bottom: 40px;
}

.catalog-figure img {
  aspect-ratio: 4 / 3;
}

.intro-text p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
}

.catalog-table-section,
.field-definition-section,
.update-note-section {
  padding-top: 16px;
  padding-bottom: 40px;
}

.catalog-table-section h2,
.field-definition-section h2,
.update-note-section h2 {
  margin-bottom: 8px;
}

.catalog-table-section .section-desc,
.field-definition-section .section-desc {
  margin-bottom: 24px;
}

.definition-list {
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.update-note-section {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 16px;
  margin-bottom: 40px;
}

.update-note-section h2 {
  margin-bottom: 12px;
}

.update-note-section p {
  color: var(--color-muted);
  font-size: 15px;
}

/* 目录页相关链接 */
.related-links {
  padding-top: 16px;
  padding-bottom: 16px;
}

.related-links h2 {
  margin-bottom: 20px;
  font-size: 22px;
}

.related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links li a,
.related-links-item {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.related-links li a:hover,
.related-links-item:hover {
  border-color: var(--color-primary);
  background-color: rgba(15, 36, 64, 0.03);
}

/* ---------- 使用示例页 ---------- */

.usage-prereq {
  padding-top: 8px;
  padding-bottom: 40px;
}

.usage-prereq h2 {
  margin-bottom: 24px;
}

.prereq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.prereq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.prereq-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.prereq-item p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.usage-scene {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: start;
  padding-top: 16px;
  padding-bottom: 40px;
}

.usage-scene-alt {
  grid-template-columns: 1.1fr 0.9fr;
}

.usage-scene-alt .scene-media {
  order: 2;
}

.usage-scene-alt .scene-content {
  order: 1;
}

.scene-media img {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
}

.scene-content h2 {
  margin-bottom: 12px;
}

.scene-desc {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.scene-steps {
  list-style: none;
  counter-reset: scene-counter;
  margin-bottom: 16px;
}

.scene-steps li {
  counter-increment: scene-counter;
  padding: 8px 0 8px 36px;
  position: relative;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
}

.scene-steps li::before {
  content: counter(scene-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
}

.scene-note {
  font-size: 14px;
  color: var(--color-muted);
  background-color: rgba(15, 36, 64, 0.04);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 0;
  line-height: 1.6;
}

.usage-conclusion {
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 32px;
  margin: 16px 0 40px;
}

.usage-conclusion h2 {
  color: #ffffff;
  margin-bottom: 20px;
}

.conclusion-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.conclusion-item {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  line-height: 1.7;
  border-left: 3px solid var(--color-accent);
  padding-left: 16px;
  margin-bottom: 0;
}

.source-notes {
  padding-top: 8px;
  padding-bottom: 40px;
}

.source-notes h2 {
  margin-bottom: 20px;
}

.source-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.source-list li {
  font-size: 14px;
  color: var(--color-muted);
  background-color: rgba(15, 36, 64, 0.04);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  line-height: 1.6;
  border-left: 3px solid var(--color-border);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  display: block;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.related-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(15, 36, 64, 0.08);
  border-color: var(--color-primary);
}

.related-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.related-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.related-links-label {
  font-size: 14px;
  color: var(--color-muted);
  margin-right: 12px;
}

/* ---------- 更新记录页 ---------- */

.record-intro {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding-top: 8px;
  padding-bottom: 40px;
}

.record-intro-text h2 {
  margin-bottom: 12px;
}

.record-intro-text p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
}

.record-figure img {
  aspect-ratio: 4 / 3;
}

.record-fields {
  padding-top: 16px;
  padding-bottom: 40px;
}

.record-fields h2 {
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.version-timeline {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 40px;
}

.version-timeline h2 {
  margin-bottom: 12px;
}

.version-timeline p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.check-path-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.check-path-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.check-path-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.check-path-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.related-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-link-list li a {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.related-link-list li a:hover {
  border-color: var(--color-primary);
  background-color: rgba(15, 36, 64, 0.03);
}

/* ---------- 引用规则页 ---------- */

.page-title-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.content-media-inline {
  margin-top: 24px;
}

.content-media-inline img {
  max-width: 720px;
  aspect-ratio: 16 / 5;
}

.rule-principles {
  padding-top: 8px;
  padding-bottom: 40px;
}

.section-header {
  margin-bottom: 24px;
}

.section-header h2 {
  margin-bottom: 8px;
}

.section-header p {
  font-size: 15px;
  color: var(--color-muted);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.principle-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  border-top: 3px solid var(--color-primary);
}

.principle-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.principle-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.prohibited-list {
  padding-top: 8px;
  padding-bottom: 40px;
}

.prohibited-items {
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: prohibited-counter;
}

.prohibited-items li {
  counter-increment: prohibited-counter;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin-bottom: 12px;
}

.prohibited-items li h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.prohibited-items li h3::before {
  content: counter(prohibited-counter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  margin-right: 12px;
}

.prohibited-items li p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.responsibility-note {
  padding-top: 8px;
  padding-bottom: 40px;
}

.responsibility-inner {
  background-color: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 32px;
}

.responsibility-inner h2 {
  color: #ffffff;
  margin-bottom: 12px;
}

.responsibility-inner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 常见问题页 ---------- */

.faq-group {
  padding-top: 8px;
  padding-bottom: 32px;
}

.faq-group h2 {
  margin-bottom: 20px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-answer p {
  margin-bottom: 8px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-fallback {
  padding-top: 8px;
  padding-bottom: 32px;
}

.faq-fallback h2 {
  margin-bottom: 8px;
}

.faq-fallback > p {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.fallback-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.fallback-list li a {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.fallback-list li a:hover {
  border-color: var(--color-primary);
  background-color: rgba(15, 36, 64, 0.03);
}

.faq-image-section {
  padding-top: 8px;
  padding-bottom: 40px;
}

.faq-figure img {
  max-width: 720px;
  aspect-ratio: 16 / 5;
}

/* ---------- 404 页 ---------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 200px);
  padding: 48px 24px;
}

.error-panel {
  text-align: center;
  max-width: 520px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.error-btn {
  background-color: var(--color-primary);
  color: #ffffff;
  margin-bottom: 16px;
}

.error-btn:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

.error-help {
  font-size: 14px;
  color: var(--color-muted);
}

/* ==========================================================================
   Responsive —— 响应式断点
   ========================================================================== */

/* ---------- 平板 1024px ---------- */

@media (max-width: 1024px) {
  .header-inner {
    min-height: var(--header-height-inner);
  }

  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 32px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-figure {
    max-width: 100%;
  }

  .usage-grid {
    grid-template-columns: 1fr;
  }

  .update-and-related {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .steps-flow {
    grid-template-columns: 1fr 1fr;
  }

  .steps-flow .step-item:last-child {
    grid-column: 1 / -1;
  }

  .prereq-grid,
  .check-path-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .prereq-item:last-child,
  .check-path-card:last-child {
    grid-column: 1 / -1;
  }

  .conclusion-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .usage-scene,
  .usage-scene-alt {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .usage-scene-alt .scene-media {
    order: 1;
  }

  .usage-scene-alt .scene-content {
    order: 2;
  }

  .catalog-intro,
  .record-intro {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .catalog-figure img,
  .record-figure img {
    max-width: 480px;
  }

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

  .principle-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .principle-card:last-child {
    grid-column: 1 / -1;
  }
}

/* ---------- 手机 768px ---------- */

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: var(--header-height-inner);
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .main-nav {
    order: 3;
    width: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    padding: 12px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    padding: 14px 12px;
    border-radius: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-link.is-current::after {
    left: 12px;
    right: auto;
    bottom: 8px;
    width: 24px;
  }

  /* 面包屑 */
  .breadcrumb-inner {
    padding-top: 10px;
    padding-bottom: 10px;
    font-size: 13px;
  }

  /* 页面标题 */
  .page-header {
    padding-top: 24px;
    padding-bottom: 4px;
    min-height: auto;
  }

  .page-title {
    font-size: 26px;
  }

  .page-title-block {
    padding-bottom: 24px;
  }

  /* 首页 */
  .hero {
    padding-top: 32px;
    padding-bottom: 32px;
    gap: 24px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    text-align: center;
  }

  .status-strip {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .status-item {
    padding: 16px 20px;
  }

  .catalog-overview,
  .update-and-related,
  .usage-preview,
  .cooperation-steps,
  .faq-preview {
    padding-top: 32px;
    padding-bottom: 32px;
  }

  .catalog-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .catalog-card {
    padding: 20px;
  }

  .update-and-related {
    gap: 24px;
  }

  .usage-grid {
    gap: 16px;
  }

  .steps-flow {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .steps-flow .step-item:last-child {
    grid-column: auto;
  }

  .accordion-item summary,
  .faq-item summary {
    padding: 16px 44px 16px 16px;
    font-size: 15px;
  }

  .accordion-item p,
  .faq-answer {
    padding: 0 16px 16px;
    font-size: 14px;
  }

  /* 内页布局 */
  .layout-shell {
    padding-top: 24px;
  }

  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .service-aside {
    position: static;
    order: 2;
  }

  .service-main {
    order: 1;
  }

  .step-flow {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service-group-head {
    padding: 14px 16px;
  }

  .service-group-body {
    padding: 16px;
  }

  .delivery-steps {
    padding: 24px 20px;
  }

  .prereq-grid,
  .check-path-grid,
  .principle-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .prereq-item:last-child,
  .check-path-card:last-child,
  .principle-card:last-child {
    grid-column: auto;
  }

  .definition-list {
    gap: 12px;
  }

  .def-item {
    padding: 16px;
  }

  .catalog-table-section,
  .field-definition-section,
  .update-note-section {
    padding-top: 8px;
    padding-bottom: 24px;
  }

  .update-note-section {
    padding: 24px 20px;
  }

  .usage-scene {
    padding-top: 8px;
    padding-bottom: 24px;
    gap: 16px;
  }

  .scene-steps li {
    font-size: 14px;
  }

  .usage-conclusion {
    padding: 24px 20px;
  }

  .conclusion-item {
    font-size: 14px;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .related-card {
    padding: 16px;
  }

  .record-intro {
    gap: 24px;
    padding-bottom: 24px;
  }

  .version-timeline {
    padding: 24px 20px;
  }

  .responsibility-inner {
    padding: 24px 20px;
  }

  .prohibited-items li {
    padding: 16px;
  }

  .faq-list {
    gap: 0;
  }

  .faq-figure img,
  .content-media-inline img {
    max-width: 100%;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 40px;
    padding-bottom: 32px;
  }

  .footer-bottom {
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  /* 404 */
  .error-code {
    font-size: 56px;
  }

  .error-panel h1 {
    font-size: 24px;
  }

  .error-panel {
    padding: 0 16px;
  }
}

/* ---------- 小屏手机 390px ---------- */

@media (max-width: 390px) {
  .brand-name {
    font-size: 19px;
  }

  .brand-tagline {
    font-size: 11px;
  }

  .nav-toggle {
    width: 40px;
    height: 40px;
  }

  .hero h1 {
    font-size: 24px;
  }

  .page-title {
    font-size: 24px;
  }

  .btn-primary,
  .btn-secondary {
    padding: 12px 20px;
    font-size: 14px;
  }

  .status-item {
    gap: 12px;
  }

  .status-text {
    font-size: 13px;
  }

  .catalog-card h3 {
    font-size: 17px;
  }

  .update-item {
    padding: 16px;
  }

  .related-panel {
    padding: 20px;
  }

  .usage-card h3 {
    padding: 16px 16px 8px;
  }

  .usage-card p {
    padding: 0 16px;
  }

  .usage-card .card-link {
    margin: 0 16px 16px;
  }

  .step-item {
    padding: 16px;
  }

  .service-group-body {
    padding: 12px;
  }

  .service-item {
    padding: 10px 0;
  }

  .delivery-steps {
    padding: 20px 16px;
  }

  .step-flow .step-item {
    padding: 16px;
  }

  .prereq-item,
  .check-path-card,
  .principle-card {
    padding: 16px;
  }

  .def-item {
    padding: 14px;
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .scene-note {
    font-size: 13px;
  }

  .conclusion-item {
    padding-left: 12px;
  }

  .related-card {
    padding: 14px;
  }

  .version-timeline {
    padding: 20px 16px;
  }

  .check-path-card {
    padding: 16px;
  }

  .responsibility-inner {
    padding: 20px 16px;
  }

  .prohibited-items li {
    padding: 14px;
  }

  .faq-item summary {
    font-size: 14px;
  }

  .footer-inner {
    gap: 24px;
    padding-top: 32px;
  }

  .footer-col h3 {
    margin-bottom: 12px;
  }
}

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}