/* ============================================================
   base — 全站基础变量、重置与排版骨架
   ============================================================ */
:root {
  --color-text: #1f2328;
  --color-bg: #f6f8fa;
  --color-card: #ffffff;
  --color-link: #0969da;
  --color-accent: #1a7f37;
  --color-border: #d1d9e0;
  --color-muted: #59636e;
  --color-code-bg: #eff2f5;

  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, 'Courier New', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --container-width: 1200px;
  --radius-small: 4px;
  --radius-medium: 6px;
  --radius-card: 8px;
  --header-height: 64px;
  --gap-section: 56px;
}

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

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

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

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

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

a:hover {
  text-decoration: underline;
}

ul,
ol {
  list-style-position: inside;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-mono);
  line-height: 1.35;
  font-weight: 600;
  color: var(--color-text);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.45rem;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

p {
  margin-bottom: 12px;
}

/* 终端风格标题前缀 */
.section-heading h2::before,
.directory-header h2::before,
.content-section h2::before,
.faq-section h2::before,
.process-step h2::before,
.service-boundary h2::before,
.related-entry h2::before,
.sidebar-toc h2::before,
.sidebar-nav h2::before,
.aside-label::before {
  content: '> ';
  color: var(--color-accent);
  font-weight: 700;
}

/* ============================================================
   layout — 全站布局骨架：页头、页脚、主容器、侧栏
   ============================================================ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-link {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}

.brand-link:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.brand-text::before {
  content: '> ';
  color: var(--color-accent);
}

.site-nav .nav-list {
  display: flex;
  list-style: none;
  gap: 6px;
}

.site-nav .nav-list a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.95rem;
  color: var(--color-text);
  border-radius: var(--radius-medium);
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}

.site-nav .nav-list a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  text-decoration: none;
}

.site-nav .nav-list a.is-current {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

/* 移动端汉堡按钮（默认隐藏，移动端显示） */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 0;
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
}

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

.site-main.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 28px 24px 64px;
}

/* 面包屑 */
.breadcrumb {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--color-border);
}

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

/* 页面标题区 */
.page-header {
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 1.9rem;
  margin-bottom: 10px;
}

.page-title::before {
  content: '> ';
  color: var(--color-accent);
}

.page-description {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 760px;
  margin-bottom: 0;
}

/* 侧栏布局（内页统一：左侧目录 + 右侧正文） */
.layout-shell.sidebar-left,
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

/* 侧栏（各页统一） */
.sidebar-toc,
.page-sidebar,
.sidebar,
.page-aside {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px 18px;
}

.sidebar-toc h2,
.sidebar-nav h2,
.sidebar-nav .sidebar-title,
.page-aside h2,
.aside-label {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.sidebar-toc ul,
.sidebar-list,
.sidebar-nav ul,
.aside-list {
  list-style: none;
}

.sidebar-toc ul li,
.sidebar-list li,
.sidebar-nav ul li,
.aside-list li {
  margin-bottom: 2px;
}

.sidebar-toc ul a,
.sidebar-list a,
.sidebar-nav ul a,
.aside-list a {
  display: block;
  padding: 7px 10px;
  font-size: 0.9rem;
  color: var(--color-muted);
  border-left: 2px solid transparent;
  border-radius: var(--radius-small);
}

.sidebar-toc ul a:hover,
.sidebar-list a:hover,
.sidebar-nav ul a:hover,
.aside-list a:hover {
  color: var(--color-accent);
  background-color: var(--color-bg);
  border-left-color: var(--color-accent);
  text-decoration: none;
}

/* 正文内容区 */
.page-content {
  min-width: 0;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  padding: 48px 24px 24px;
  margin-top: 48px;
}

.footer-columns {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding-bottom: 32px;
}

.footer-col h2 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 0.92rem;
  color: var(--color-muted);
}

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

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ============================================================
   components — 通用组件：按钮、卡片、筛选、折叠、徽章等
   ============================================================ */
/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-medium);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

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

.btn-primary:hover {
  background-color: #14632b;
  text-decoration: none;
  color: #ffffff;
}

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

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

/* 文本链接 */
.text-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-link);
}

.text-link::after {
  content: ' →';
}

/* 终端风格卡片 */
.trend-card,
.case-card,
.service-item,
.faq-item,
.error-panel {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
}

/* 筛选标签 */
.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-tag {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 0.88rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
  min-height: 40px;
}

.filter-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-tag.is-active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
}

/* 折叠问答 */
.faq-item {
  margin-bottom: 12px;
  padding: 16px 20px;
}

.faq-item summary {
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-text);
}

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

.faq-item summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

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

.faq-answer {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-muted);
}

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

/* 状态徽章 */
.status-tag {
  display: inline-block;
  background-color: var(--color-accent);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
}

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

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

figcaption {
  font-size: 0.82rem;
  color: var(--color-muted);
  padding: 8px 0 0;
}

/* 进度提示条 */
.progress-tip {
  background-color: var(--color-card);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-medium);
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 0.92rem;
}

.progress-tip p {
  margin-bottom: 6px;
}

/* 相关链接 */
.related-links {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.related-links p {
  margin-bottom: 10px;
}

.related-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links ul li a {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  font-size: 0.9rem;
}

.related-links ul li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

/* ============================================================
   pages — 首页各模块
   ============================================================ */
/* 首屏 hero */
.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.2rem;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 1.08rem;
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 520px;
}

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

.hero-visual {
  position: relative;
}

.hero-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-card);
}

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

.hero-figure figcaption {
  padding: 10px 14px;
}

/* 首页内容媒体（第二张图） */
.content-media-primary {
  max-width: var(--container-width);
  margin: 0 auto 8px;
  padding: 0 24px;
}

.content-media-primary img {
  aspect-ratio: 16 / 5;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}

.content-media-primary figcaption {
  padding-left: 4px;
}

/* 最新动态与趋势专题 */
.news-trends-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
}

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

.news-trends-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.news-column h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

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

.news-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.news-list time {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-muted);
  flex-shrink: 0;
  white-space: nowrap;
}

.news-list a {
  font-size: 0.95rem;
  color: var(--color-text);
}

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

.trend-card {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.trend-card h3 {
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.trend-card p {
  font-size: 0.93rem;
  color: var(--color-muted);
  flex: 1;
}

.trend-card .text-link {
  margin-top: 12px;
}

/* 服务目录（搜索结果式） */
.service-directory {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
}

.directory-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 16px;
}

.directory-header h2 {
  margin-bottom: 0;
}

.result-meta {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  padding: 10px 14px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.service-list .service-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px 20px;
}

.service-index {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--color-bg);
  border-radius: var(--radius-medium);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-info h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.service-info p {
  font-size: 0.92rem;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.service-info .deliverable {
  display: inline-block;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--color-accent);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 3px 10px;
}

.service-link {
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
}

/* 制作流程预览 */
.process-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
}

.steps-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.step-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px 16px;
  position: relative;
}

.step-number {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.step-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 0.88rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* 案例预览 */
.case-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
}

.case-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.case-cards .case-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.case-cards .case-card h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.case-cards .case-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.case-cards .case-card .text-link {
  margin-top: 8px;
}

/* FAQ 预览 */
.faq-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
}

.faq-preview .faq-item {
  padding: 16px 20px;
}

.faq-preview .faq-item summary {
  font-size: 0.95rem;
}

.faq-preview .faq-item p {
  font-size: 0.92rem;
  color: var(--color-muted);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.faq-preview > .text-link {
  display: inline-block;
  margin-top: 12px;
}

/* 合作入口 */
.cooperation-cta {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  text-align: left;
}

.cooperation-cta h2 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.cooperation-cta p {
  font-size: 0.95rem;
  color: var(--color-muted);
  max-width: 620px;
  margin-bottom: 20px;
}

/* ============================================================
   pages — 内页：服务总览 / 制作流程 / 案例方法 / FAQ / 合作准备
   ============================================================ */
/* 服务总览 */
.service-catalog {
  margin-bottom: 40px;
}

.service-catalog .service-item {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  margin-bottom: 20px;
  padding: 0;
  overflow: hidden;
}

.service-media {
  background-color: var(--color-bg);
}

.service-media img {
  aspect-ratio: 4 / 3;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-catalog .service-info {
  padding: 20px 20px 20px 0;
}

.service-catalog .service-info h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.service-scene {
  font-size: 0.92rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.service-work {
  margin-bottom: 12px;
}

.service-work h3,
.service-deliverable h3 {
  font-size: 0.88rem;
  margin-bottom: 6px;
  color: var(--color-text);
}

.service-work ul,
.service-deliverable ul {
  list-style: none;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.service-work ul li,
.service-deliverable ul li {
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.service-work ul li::before,
.service-deliverable ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.service-catalog .service-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.88rem;
}

/* 服务边界 */
.service-boundary {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 32px;
}

.service-boundary p {
  font-size: 0.93rem;
  color: var(--color-muted);
}

.boundary-list {
  list-style: none;
  margin: 16px 0;
}

.boundary-list li {
  padding: 6px 0 6px 20px;
  position: relative;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.boundary-list li::before {
  content: '!';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 700;
}

.boundary-note {
  font-size: 0.88rem;
  padding: 12px 16px;
  background-color: var(--color-bg);
  border-radius: var(--radius-medium);
}

/* 相关入口 */
.related-entry {
  margin-top: 24px;
}

.related-entry p {
  font-size: 0.93rem;
  color: var(--color-muted);
}

.related-entry a {
  margin-right: 16px;
}

/* 制作流程 */
.process-step {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.process-step h2 {
  font-size: 1.25rem;
  margin-bottom: 14px;
}

.process-step h3 {
  font-size: 0.95rem;
  margin-top: 18px;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.93rem;
  color: var(--color-muted);
}

.process-step ul {
  list-style: none;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.process-step ul li {
  padding: 4px 0 4px 18px;
  position: relative;
}

.process-step ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.process-step .quality-check {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  padding: 14px 18px;
  margin-top: 12px;
}

.process-step .quality-check li {
  padding-left: 20px;
}

.process-step .quality-check li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
}

.content-media-inline {
  margin: 16px 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.content-media-inline img {
  aspect-ratio: 16 / 7;
}

.content-media-inline figcaption {
  padding: 10px 14px;
  background-color: var(--color-card);
}

/* 流程提示 */
.process-note {
  background-color: var(--color-card);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-medium);
  padding: 20px 24px;
  margin: 32px 0;
}

.process-note h2 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.process-note p {
  font-size: 0.92rem;
  color: var(--color-muted);
}

.process-note ul {
  list-style: none;
  margin: 12px 0;
}

.process-note ul li {
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.process-note ul li::before {
  content: '— ';
  color: var(--color-accent);
}

/* 案例方法 */
.content-section {
  margin-bottom: 36px;
}

.content-section > p {
  font-size: 0.93rem;
  color: var(--color-muted);
  max-width: 720px;
}

.filter-tip {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 12px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.case-grid .case-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

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

.case-media img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
}

.case-body {
  padding: 18px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.case-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 3px 10px;
  align-self: flex-start;
}

.case-body h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.case-goal,
.case-solution {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.case-goal strong,
.case-solution strong {
  color: var(--color-text);
  font-weight: 600;
}

.case-modules {
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* FAQ 页 */
.faq-section {
  margin-bottom: 36px;
}

.section-lead {
  font-size: 0.93rem;
  color: var(--color-muted);
  margin-bottom: 16px;
}

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

.faq-figure {
  margin-top: 36px;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-card);
}

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

.faq-figure figcaption {
  padding: 10px 14px;
  background-color: var(--color-card);
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* 合作准备 */
.page-cooperation .content-section {
  margin-bottom: 36px;
}

.checklist-list {
  list-style: none;
  margin: 16px 0;
}

.checklist-list li {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  padding: 16px 20px;
  margin-bottom: 10px;
  font-size: 0.93rem;
  color: var(--color-muted);
}

.checklist-list li strong {
  display: block;
  color: var(--color-text);
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.decision-steps {
  list-style: none;
  counter-reset: decision;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 16px 0;
}

.decision-steps li {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  counter-increment: decision;
  position: relative;
}

.decision-steps li::before {
  content: '0' counter(decision) '.';
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 8px;
}

.decision-steps li h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.decision-steps li p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.help-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.help-links li a {
  display: inline-block;
  padding: 10px 18px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  font-size: 0.92rem;
  font-weight: 500;
}

.help-links li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

.content-figure {
  margin-top: 32px;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-card);
}

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

.content-figure figcaption {
  padding: 10px 14px;
  background-color: var(--color-card);
}

/* 404 */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

.error-panel {
  max-width: 520px;
  width: 100%;
  text-align: center;
  padding: 40px 32px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.error-panel h1 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.error-home-link {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-accent);
  color: #ffffff;
  border-radius: var(--radius-medium);
  font-weight: 600;
}

.error-home-link:hover {
  background-color: #14632b;
  text-decoration: none;
  color: #ffffff;
}

/* ============================================================
   responsive — 响应式断点
   ============================================================ */
@media (max-width: 1024px) {
  .layout-shell.sidebar-left,
  .page-layout.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 32px;
  }

  .service-catalog .service-item {
    grid-template-columns: 200px minmax(0, 1fr);
  }

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

@media (max-width: 860px) {
  /* 内页：侧栏折叠为正文上方可展开面板 */
  .layout-shell.sidebar-left,
  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-toc,
  .page-sidebar,
  .sidebar,
  .page-aside {
    position: static;
    order: -1;
  }

  .page-content {
    order: 2;
  }

  /* 首页服务列表 */
  .service-list .service-item {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .service-link {
    grid-column: 2;
  }

  /* 服务总览卡片 */
  .service-catalog .service-item {
    grid-template-columns: 1fr;
  }

  .service-catalog .service-info {
    padding: 16px 20px;
  }

  .service-media img {
    aspect-ratio: 16 / 9;
  }

  /* 案例网格 */
  .case-grid {
    grid-template-columns: 1fr;
  }

  /* 决策流程 */
  .decision-steps {
    grid-template-columns: 1fr;
  }

  /* 页脚 */
  .footer-columns {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  /* 移动端导航 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 12px 24px 20px;
    gap: 4px;
  }

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

  .site-nav .nav-list a {
    display: block;
    padding: 12px 14px;
    font-size: 1rem;
    border-bottom: none;
    border-radius: var(--radius-medium);
  }

  .site-nav .nav-list a:hover {
    background-color: var(--color-bg);
  }

  .site-nav .nav-list a.is-current {
    background-color: var(--color-bg);
  }

  /* 首页 hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 20px 20px;
  }

  .hero-content h1 {
    font-size: 1.7rem;
  }

  .hero-visual {
    order: 2;
  }

  /* 最新动态与趋势 */
  .news-trends-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* 流程步骤 */
  .steps-track {
    grid-template-columns: 1fr 1fr;
  }

  /* 案例预览 */
  .case-cards {
    grid-template-columns: 1fr 1fr;
  }

  /* 内容媒体 */
  .content-media-primary {
    padding: 0 20px;
  }

  .content-media-primary img {
    aspect-ratio: 16 / 7;
  }
}

@media (max-width: 540px) {
  .header-inner {
    padding: 0 16px;
  }

  .brand-link {
    font-size: 0.95rem;
  }

  .site-main.inner-main {
    padding: 20px 16px 48px;
  }

  .page-header {
    margin-bottom: 28px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  /* 步骤、案例、页脚单列 */
  .steps-track {
    grid-template-columns: 1fr;
  }

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

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }

  /* 首页 hero */
  .hero-section {
    padding: 32px 16px 16px;
  }

  .hero-content h1 {
    font-size: 1.45rem;
  }

  .hero-lead {
    font-size: 1rem;
  }

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

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

  /* 服务目录 */
  .service-directory,
  .process-preview,
  .case-preview,
  .faq-preview,
  .cooperation-cta,
  .news-trends-section {
    padding: 16px;
  }

  .directory-header {
    flex-direction: column;
  }

  .service-list .service-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .service-index {
    width: 36px;
    height: 36px;
    font-size: 0.95rem;
  }

  .service-link {
    grid-column: 1;
  }

  /* 筛选标签横向滚动 */
  .filter-tags {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-tag {
    flex-shrink: 0;
  }

  /* FAQ 折叠 */
  .faq-item {
    padding: 14px 16px;
  }

  .faq-item summary {
    font-size: 0.92rem;
  }

  /* 流程步骤内容 */
  .process-step {
    margin-bottom: 32px;
  }

  .process-note {
    padding: 16px 18px;
  }

  /* 案例卡片 */
  .case-body {
    padding: 14px 16px;
  }

  /* 合作清单 */
  .checklist-list li {
    padding: 14px 16px;
  }

  .decision-steps li {
    padding: 16px;
  }

  /* 404 */
  .error-main {
    padding: 48px 16px;
  }

  .error-panel {
    padding: 32px 20px;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}