/* ==========================================================================
   吃瓜列表 · 全站样式表
   城市服务风 · 公共信息感 · 可靠排版
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base · 基础变量与全局重置
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1f4e5f;
  --color-secondary: #3a7b8c;
  --color-bg-light: #e8f0f2;
  --color-bg-page: #f5f7f6;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-white: #ffffff;
  --color-border: #d8e0e2;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Microsoft YaHei', sans-serif;
  --container-width: 1200px;
  --container-padding: 24px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 4px rgba(31, 78, 95, 0.08);
  --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-page);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.4;
  color: var(--color-primary);
  font-weight: 600;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

/* 通用容器 */
.site-main {
  flex: 1;
  width: 100%;
}

/* --------------------------------------------------------------------------
   Layout · 全站骨架
   -------------------------------------------------------------------------- */

/* 页面根布局：header + main + footer 纵向排列 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 页头 */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand-link {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* 主导航 */
.primary-nav ul {
  display: flex;
  gap: 4px;
}

.primary-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.primary-nav a:hover {
  background-color: var(--color-bg-light);
  color: var(--color-primary);
}

.primary-nav a.is-current {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 500;
}

/* 移动端汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  border-radius: var(--radius-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* 页脚 */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h3 {
  font-size: 16px;
  color: var(--color-white);
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  transition: color var(--transition-base);
}

.footer-col a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px var(--container-padding);
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
}

.footer-bottom p {
  margin-bottom: 4px;
}

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

/* --------------------------------------------------------------------------
   Components · 通用组件
   -------------------------------------------------------------------------- */

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px var(--container-padding) 0;
  font-size: 14px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

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

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

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 内页统一容器 */
.inner-main {
  width: 100%;
}

/* 页面标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px var(--container-padding) 0;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-title-area,
.page-title-block,
.page-heading {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px var(--container-padding) 0;
  color: var(--color-text-muted);
}

.page-intro {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base),
    color var(--transition-base), border-color var(--transition-base);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  display: inline-block;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  background-color: var(--color-secondary);
  color: var(--color-white);
  border: 1px solid var(--color-secondary);
  transition: background-color var(--transition-base),
    border-color var(--transition-base);
}

.btn-primary:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.btn-secondary {
  display: inline-block;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--color-secondary);
  border: 1px solid var(--color-secondary);
  transition: background-color var(--transition-base),
    color var(--transition-base);
}

.btn-secondary:hover {
  background-color: var(--color-bg-light);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-home {
  display: inline-block;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  background-color: var(--color-secondary);
  color: var(--color-white);
  border: 1px solid var(--color-secondary);
  transition: background-color var(--transition-base),
    border-color var(--transition-base);
}

.btn-home:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* 区块标题 */
.section-heading {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section-heading h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.section-heading p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* 区块通用间距 */
section {
  padding: 48px 0;
}

/* 图片容器统一约束 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.media-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-figure figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 12px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

/* 步骤编号 */
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Pages · 首页
   -------------------------------------------------------------------------- */

/* Hero 区 */
.hero-section {
  background-color: var(--color-bg-light);
  padding: 56px 0;
}

.hero-content,
.hero-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-content h1 {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-primary);
  max-width: 720px;
}

.hero-desc {
  font-size: 17px;
  color: var(--color-text);
  max-width: 680px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.hero-media {
  max-width: var(--container-width);
}

.hero-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* 服务目录区 */
.service-directory {
  background-color: var(--color-bg-page);
}

.directory-grid {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.directory-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.directory-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-secondary);
}

.directory-card h3 {
  font-size: 18px;
  color: var(--color-primary);
}

.directory-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
}

.directory-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-secondary);
  align-self: flex-start;
  transition: color var(--transition-base);
}

.directory-card a:hover {
  color: var(--color-primary);
}

/* 工作方式区 */
.workflow-section {
  background-color: var(--color-white);
}

.workflow-block {
  max-width: var(--container-width);
  margin: 40px auto 0;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.workflow-block.reverse {
  margin-top: 32px;
}

.workflow-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.workflow-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.workflow-text h3 {
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.workflow-text p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 10px;
}

/* 应用场景预览 */
.scenario-preview {
  background-color: var(--color-bg-page);
}

.scenario-grid {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.scenario-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-secondary);
}

.scenario-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.scenario-icon img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.scenario-card h3 {
  font-size: 17px;
  color: var(--color-primary);
}

.scenario-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* 边界声明区 */
.boundary-section {
  background-color: var(--color-white);
}

.boundary-content {
  max-width: var(--container-width);
  margin: 24px auto 0;
  padding: 0 var(--container-padding);
}

.boundary-content p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
  padding-left: 16px;
  border-left: 3px solid var(--color-bg-light);
}

/* 合作入口区 */
.cooperation-entry {
  background-color: var(--color-bg-light);
}

.cooperation-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  text-align: left;
}

.cooperation-inner h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.cooperation-inner p {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 16px;
  max-width: 680px;
}

.cooperation-inner .btn-primary {
  margin-bottom: 12px;
}

.entry-note {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
}

/* --------------------------------------------------------------------------
   Pages · 服务内容页
   -------------------------------------------------------------------------- */

.service-list-section {
  background-color: var(--color-bg-page);
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: 720px;
  margin-bottom: 24px;
}

.service-list-section h2,
.process-section h2,
.delivery-section h2,
.cooperation-entry h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.service-card-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.service-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-secondary);
}

.service-card h3 {
  font-size: 18px;
  color: var(--color-primary);
}

.service-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* 流程步骤 */
.process-section {
  background-color: var(--color-white);
}

.process-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-step {
  background-color: var(--color-bg-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition-base);
}

.process-step:hover {
  box-shadow: var(--shadow-card);
}

.process-step .step-number {
  background-color: var(--color-secondary);
}

.process-step h3 {
  font-size: 16px;
  color: var(--color-primary);
}

.process-step p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.process-visual {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 0 var(--container-padding);
}

.process-visual .media-figure {
  max-width: 720px;
}

.process-visual .media-figure img {
  height: 240px;
}

/* 交付说明 */
.delivery-section {
  background-color: var(--color-bg-page);
}

.delivery-content {
  max-width: var(--container-width);
  margin: 24px auto 0;
  padding: 0 var(--container-padding);
}

.delivery-content p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 12px;
}

/* 服务页合作入口 */
.service-list-section + .cooperation-entry {
  background-color: var(--color-white);
}

.cooperation-entry p {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 12px;
}

.cooperation-entry a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-secondary);
  margin-right: 16px;
  transition: color var(--transition-base);
}

.cooperation-entry a:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Pages · 每日榜单页
   -------------------------------------------------------------------------- */

.topic-category-section {
  background-color: var(--color-bg-page);
}

.topic-category-section h2,
.ranking-preview-section h2,
.ranking-methodology h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 8px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: var(--container-width);
  margin: 0 auto 24px;
  padding: 0 var(--container-padding);
}

.category-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.category-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.category-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-secondary);
}

.category-card h3 {
  font-size: 17px;
  color: var(--color-primary);
}

.category-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 榜单预览 */
.ranking-preview-section {
  background-color: var(--color-white);
}

.topic-example-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.topic-example-item {
  background-color: var(--color-bg-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.topic-example-item:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-secondary);
}

.topic-example-item h3 {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.topic-example-item p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 榜单方法论 */
.ranking-methodology {
  background-color: var(--color-bg-page);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.methodology-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.methodology-content h2 {
  padding: 0;
  margin-left: 0;
  margin-right: 0;
}

.methodology-content p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 16px;
}

.methodology-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

.methodology-table th,
.methodology-table td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
  vertical-align: top;
}

.methodology-table th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 500;
}

.methodology-table td {
  background-color: var(--color-white);
  color: var(--color-text);
}

.methodology-note {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
}

.methodology-figure {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.methodology-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.methodology-figure figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 0;
  text-align: center;
}

/* 相关阅读 */
.related-links-section {
  background-color: var(--color-white);
}

.related-links-section h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 16px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.related-link-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-link-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.related-link-list a {
  font-size: 15px;
  color: var(--color-secondary);
  transition: color var(--transition-base);
}

.related-link-list a:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Pages · 使用指南页
   -------------------------------------------------------------------------- */

.quick-steps-section {
  background-color: var(--color-bg-page);
}

.quick-steps-section h2,
.timeline-view-section h2,
.filter-section h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 8px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.steps-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.step-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--color-secondary);
}

.step-card .step-number {
  background-color: var(--color-secondary);
  margin-bottom: 4px;
}

.step-card h3 {
  font-size: 17px;
  color: var(--color-primary);
}

.step-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* 时间线视图 */
.timeline-view-section {
  background-color: var(--color-white);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.timeline-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.timeline-media figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.timeline-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.timeline-media figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 12px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.timeline-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.timeline-content h2 {
  padding: 0;
  margin-left: 0;
  margin-right: 0;
}

.timeline-content p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 10px;
}

/* 筛选说明 */
.filter-section {
  background-color: var(--color-bg-page);
}

.filter-section p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  max-width: var(--container-width);
  margin: 0 auto 12px;
  padding: 0 var(--container-padding);
}

/* 指南页相关阅读 */
.related-links-section .related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-links-section .related-links li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.related-links-section .related-links a {
  font-size: 15px;
  color: var(--color-secondary);
  transition: color var(--transition-base);
}

.related-links-section .related-links a:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Pages · 应用场景页
   -------------------------------------------------------------------------- */

.scene-section {
  background-color: var(--color-bg-page);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.scene-section:nth-of-type(even) {
  background-color: var(--color-white);
}

.scene-text {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.scene-text h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.scene-text p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 10px;
}

.scene-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.scene-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* 相关链接 */
.related-links {
  background-color: var(--color-bg-page);
}

.related-links h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 16px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.related-links ul {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-links li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.related-links a {
  font-size: 15px;
  color: var(--color-secondary);
  transition: color var(--transition-base);
}

.related-links a:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Pages · 解读观察页
   -------------------------------------------------------------------------- */

.interpretation-overview {
  background-color: var(--color-bg-page);
}

.interpretation-overview h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 12px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.interpretation-overview p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  max-width: var(--container-width);
  margin: 0 auto 12px;
  padding: 0 var(--container-padding);
}

/* 案例研究 */
.case-study {
  background-color: var(--color-white);
}

.case-study h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 20px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.case-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.case-reverse .case-media {
  direction: ltr;
}

.case-reverse .case-media .media-figure {
  order: 2;
}

.case-reverse .case-media .case-content {
  order: 1;
}

.case-media .media-figure {
  width: 100%;
}

.case-media .media-figure img {
  height: 260px;
}

.case-content h3 {
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.case-content p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 10px;
}

/* 关联阅读 */
.related-reading {
  background-color: var(--color-bg-page);
}

.related-reading h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 16px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.related-reading .related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-reading .related-links li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.related-reading .related-links a {
  font-size: 15px;
  color: var(--color-secondary);
  transition: color var(--transition-base);
}

.related-reading .related-links a:hover {
  color: var(--color-primary);
}

/* 内容底部导航 */
.related-links-label {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-secondary);
  margin-right: 12px;
  transition: color var(--transition-base);
}

.related-links-item:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Pages · 常见问题页
   -------------------------------------------------------------------------- */

.faq-question-list {
  background-color: var(--color-bg-page);
}

.faq-question-list h2,
.faq-accordion h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 16px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--container-padding);
}

.question-index-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 24px;
}

.question-index-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
}

.question-index-list a {
  font-size: 15px;
  color: var(--color-secondary);
  transition: color var(--transition-base);
}

.question-index-list a:hover {
  color: var(--color-primary);
}

/* FAQ 手风琴 */
.faq-accordion {
  background-color: var(--color-white);
}

.faq-item {
  max-width: var(--container-width);
  margin: 0 auto 12px;
  padding: 0 var(--container-padding);
}

.faq-item details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  transition: border-color var(--transition-base);
}

.faq-item details[open] {
  border-color: var(--color-secondary);
}

.faq-item summary {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 20px;
  color: var(--color-secondary);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.faq-item details[open] summary::after {
  content: '−';
}

.faq-item summary:hover {
  background-color: var(--color-bg-light);
}

.faq-answer {
  padding: 0 18px 14px;
}

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

/* FAQ 合作入口 */
.cooperation-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.cooperation-content p {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 12px;
}

.cooperation-content a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-secondary);
  margin-right: 16px;
  transition: color var(--transition-base);
}

.cooperation-content a:hover {
  color: var(--color-primary);
}

/* FAQ 视觉分隔 */
.faq-visual-divider {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 0 var(--container-padding);
}

.faq-visual-divider img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.faq-visual-divider figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 0;
  text-align: center;
}

/* --------------------------------------------------------------------------
   Pages · 404 页
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px var(--container-padding);
  background-color: var(--color-bg-page);
}

.error-inner {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

.error-inner h1 {
  font-size: 24px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* --------------------------------------------------------------------------
   Responsive · 响应式
   -------------------------------------------------------------------------- */

/* 平板 */
@media (max-width: 992px) {
  .directory-grid,
  .scenario-grid,
  .service-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .ranking-methodology {
    grid-template-columns: 1fr;
  }

  .timeline-view-section {
    grid-template-columns: 1fr;
  }

  .scene-section {
    grid-template-columns: 1fr;
  }

  .case-media {
    grid-template-columns: 1fr;
  }

  .case-reverse .case-media .media-figure {
    order: 1;
  }

  .case-reverse .case-media .case-content {
    order: 2;
  }

  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

/* 手机 */
@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
  }

  .header-inner {
    min-height: 56px;
    flex-wrap: wrap;
    padding: 8px var(--container-padding);
  }

  .brand-name {
    font-size: 18px;
  }

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

  /* 汉堡按钮显示 */
  .nav-toggle {
    display: flex;
  }

  /* 导航列表收起 */
  .primary-nav {
    order: 3;
    width: 100%;
  }

  .primary-nav ul {
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    border-top: 1px solid var(--color-border);
  }

  .primary-nav ul.is-open {
    display: flex;
  }

  .primary-nav a {
    padding: 12px 8px;
    font-size: 15px;
    border-radius: var(--radius-sm);
  }

  .primary-nav a.is-current {
    background-color: transparent;
    color: var(--color-primary);
    font-weight: 600;
  }

  /* 首页 Hero */
  .hero-section {
    padding: 32px 0;
  }

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

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

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

  .hero-media img {
    height: 200px;
  }

  /* 区块间距 */
  section {
    padding: 32px 0;
  }

  .section-heading h2,
  .topic-category-section h2,
  .ranking-preview-section h2,
  .ranking-methodology h2,
  .quick-steps-section h2,
  .timeline-view-section h2,
  .filter-section h2,
  .scene-text h2,
  .related-links h2,
  .interpretation-overview h2,
  .case-study h2,
  .related-reading h2,
  .faq-question-list h2,
  .faq-accordion h2 {
    font-size: 19px;
  }

  /* 网格降为单列 */
  .directory-grid,
  .scenario-grid,
  .service-card-grid,
  .process-steps,
  .category-grid,
  .topic-example-list,
  .steps-grid,
  .question-index-list {
    grid-template-columns: 1fr;
  }

  /* 图文块降为单列 */
  .workflow-block,
  .workflow-block.reverse {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .workflow-media img {
    height: 200px;
  }

  .ranking-methodology,
  .timeline-view-section,
  .scene-section {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .methodology-figure img,
  .timeline-media img,
  .scene-media img {
    height: 200px;
  }

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

  .case-media .media-figure img {
    height: 200px;
  }

  /* 流程步骤 */
  .process-step {
    padding: 16px;
  }

  /* 表格横向滚动 */
  .methodology-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px var(--container-padding) 24px;
  }

  .footer-bottom {
    padding: 12px var(--container-padding);
    font-size: 12px;
  }

  /* 页面标题 */
  .page-header {
    padding-top: 16px;
  }

  .page-title {
    font-size: 22px;
  }

  .breadcrumb {
    padding-top: 12px;
    font-size: 13px;
  }

  /* FAQ */
  .faq-item summary {
    padding: 12px 14px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 14px 12px;
  }

  /* 合作入口 */
  .cooperation-entry a {
    display: inline-block;
    margin-bottom: 8px;
  }

  /* 404 */
  .error-code {
    font-size: 48px;
  }

  .error-inner h1 {
    font-size: 20px;
  }
}

/* 小屏手机 */
@media (max-width: 390px) {
  .brand-tagline {
    display: none;
  }

  .hero-content h1 {
    font-size: 22px;
  }

  .hero-media img {
    height: 180px;
  }

  .directory-card,
  .scenario-card,
  .service-card,
  .step-card {
    padding: 16px;
  }

  .process-step {
    padding: 14px;
  }

  .category-card {
    padding: 16px;
  }

  .topic-example-item {
    padding: 14px;
  }
}