/* ============================================================
   BASE — 全局基础
   ============================================================ */
:root {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --accent-cyan: #22D3EE;
  --accent-blue: #3B82F6;
  --accent-yellow: #FACC15;
  --border-color: #334155;
  --border-light: #475569;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, "Courier New", monospace;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #67E8F9;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.4;
}

h1 {
  font-size: 40px;
}

h2 {
  font-size: 28px;
}

h3 {
  font-size: 20px;
}

h4 {
  font-size: 18px;
}

p {
  margin-bottom: 1em;
}

/* ============================================================
   LAYOUT — 全站布局骨架
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

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

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-name::before {
  content: "// ";
  color: var(--accent-cyan);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-group-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  white-space: nowrap;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
  min-height: 44px;
  line-height: 28px;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-link.is-current {
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
  font-weight: 600;
}

.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.footer-brand-name {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-tagline {
  font-size: 14px;
  color: var(--accent-cyan);
  font-weight: 500;
}

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

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

.footer-nav-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.footer-link {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-action {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
}

.btn-footer {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent-cyan);
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-md);
  transition: background 0.2s ease, transform 0.2s ease;
  line-height: 1.4;
  min-height: 44px;
}

.btn-footer:hover {
  background: #67E8F9;
  color: var(--bg-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  text-align: center;
}

.copyright {
  font-size: 13px;
  color: var(--text-muted);
  max-width: var(--container-width);
  margin: 0 auto;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */
/* 按钮 */
.btn-primary,
.btn-secondary,
.btn-home,
.btn-related,
.btn-sidebar {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
  min-height: 44px;
  line-height: 1.4;
}

.btn-primary {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: #67E8F9;
  color: var(--bg-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.btn-secondary:hover {
  background: rgba(34, 211, 238, 0.08);
  color: var(--accent-cyan);
}

.btn-home {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

.btn-home:hover {
  background: #67E8F9;
  color: var(--bg-primary);
}

.btn-related,
.btn-sidebar {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  width: 100%;
  text-align: center;
}

.btn-related:hover,
.btn-sidebar:hover {
  background: rgba(34, 211, 238, 0.08);
  color: var(--accent-cyan);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--border-light);
  font-family: var(--font-mono);
}

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

/* 页头标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 0;
}

.page-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.page-title-desc,
.page-subtitle {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 内容容器 */
.content-wrap {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}

.content-wrap > * {
  min-width: 0;
}

.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}

.content-main,
.main-content {
  min-width: 0;
}

/* 目录 */
.toc {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.toc-title,
.toc h2 {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.toc a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-secondary);
  min-height: 36px;
  line-height: 24px;
}

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

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-list a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-secondary);
  min-height: 36px;
  line-height: 24px;
}

.toc-list a:hover {
  color: var(--accent-cyan);
}

/* 正文区块 */
.body,
.body-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.body-section,
.content-section {
  margin-bottom: 8px;
}

.body-section h2,
.content-section h2 {
  font-size: 24px;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.body-section p,
.content-section p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1em;
}

/* 表格 */
.deliverables {
  margin-top: 8px;
}

.deliverables h2 {
  font-size: 24px;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.deliverables-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.deliverables-table th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
  text-align: left;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
}

.deliverables-table td {
  padding: 14px 16px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
  line-height: 1.6;
}

.deliverables-table tr:last-child td {
  border-bottom: none;
}

/* 侧栏 */
.related,
.related-sidebar,
.sidebar {
  min-width: 0;
}

.related-title,
.related h2,
.sidebar-title,
.sidebar-label {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.related-link,
.sidebar-link,
.related-list a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  min-height: 44px;
  line-height: 24px;
}

.related-link:hover,
.sidebar-link:hover,
.related-list a:hover {
  color: var(--accent-cyan);
}

.related-list {
  list-style: none;
  margin-bottom: 20px;
}

.related-list li {
  margin: 0;
}

.related-list a {
  border-bottom: 1px solid var(--border-color);
}

.related .btn-related,
.related-sidebar .btn-sidebar,
.sidebar .btn-sidebar {
  margin-top: 20px;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-block {
  margin-bottom: 32px;
}

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.related-links-item {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  min-height: 44px;
  line-height: 26px;
}

.related-links-item:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

/* ============================================================
   PAGES — 首页
   ============================================================ */
.home-main {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 首屏 hero-nav */
.hero-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding: 48px 24px 64px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
  text-align: left;
  padding-bottom: 40px;
}

.hero-content h1 {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 16px;
  max-width: 720px;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 640px;
}

.hero-content .btn-primary {
  display: inline-block;
}

.hero-visual {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
  padding-bottom: 48px;
}

.hero-figure {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  width: 100%;
}

.hero-figure img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.hero-nav-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.nav-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.nav-block:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.nav-block-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.nav-block-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.nav-block-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-block-list li {
  margin: 0;
}

.nav-block-list a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-secondary);
  min-height: 36px;
  line-height: 24px;
}

.nav-block-list a:hover {
  color: var(--accent-cyan);
}

/* 业务版图 */
.business-overview {
  padding: 64px 24px;
  border-bottom: 1px solid var(--border-color);
}

.section-head {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
  margin-bottom: 32px;
}

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

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 640px;
}

.overview-grid {
  max-width: var(--container-width);
  margin: 0 auto 32px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.service-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.card-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: var(--radius-sm);
}

.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-cyan);
  padding: 8px 0;
  min-height: 44px;
  line-height: 28px;
}

.card-link:hover {
  color: #67E8F9;
}

.overview-figure {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.overview-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* 用户角色 */
.role-support {
  padding: 64px 24px;
  border-bottom: 1px solid var(--border-color);
}

.role-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.role-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.role-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.role-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.role-block-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.role-block-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 流程提要 */
.process-teaser {
  padding: 64px 24px;
  border-bottom: 1px solid var(--border-color);
}

.process-strip {
  max-width: var(--container-width);
  margin: 0 auto 32px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.process-step {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.process-step:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-yellow);
}

.step-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.step-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.process-teaser .btn-secondary {
  display: inline-block;
  margin: 0 auto;
}

/* 覆盖说明 */
.coverage-note {
  padding: 48px 24px;
}

.coverage-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.coverage-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.coverage-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
  max-width: 640px;
}

.coverage-inner .btn-primary {
  flex-shrink: 0;
}

/* ============================================================
   PAGES — 影像服务列表页
   ============================================================ */
.service-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.service-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  gap: 32px;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color 0.2s ease;
}

.service-item:hover {
  border-color: var(--accent-cyan);
}

.service-text {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.service-text h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
}

.service-summary {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.service-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.service-tags li {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: var(--radius-sm);
}

.service-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-cyan);
  padding: 8px 0;
  min-height: 44px;
  line-height: 28px;
}

.service-link:hover {
  color: #67E8F9;
}

.service-media {
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  width: 100%;
}

.service-media img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.help-guide {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 64px;
  text-align: center;
}

.help-guide h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.help-guide-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto 24px;
}

.help-guide-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   PAGES — 报告详情页（企业宣传片 / 产品视频）
   ============================================================ */
.executive-summary {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
}

.executive-summary h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.summary-text {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.summary-figure {
  margin-top: 20px;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

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

.summary-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  line-height: 1.5;
}

.summary-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: start;
}

.summary-grid .summary-figure {
  margin-top: 0;
}

/* 正文列表 */
.content-list {
  list-style: none;
  margin-bottom: 1em;
}

.content-list li {
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  border-bottom: 1px solid rgba(71, 85, 105, 0.3);
}

.content-list li::before {
  content: "▸ ";
  color: var(--accent-cyan);
}

/* ============================================================
   PAGES — 短视频代运营页
   ============================================================ */
.executive-summary-text {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.executive-summary-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.executive-summary-media {
  margin-top: 20px;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

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

/* ============================================================
   PAGES — 直播策划页
   ============================================================ */
.media-figure {
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
}

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

.executive-summary p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   PAGES — 制作流程页
   ============================================================ */
.process-timeline {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.process-timeline::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 48px;
  position: relative;
  min-width: 0;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-number {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--accent-yellow);
  background: var(--bg-primary);
  border: 2px solid var(--accent-yellow);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.timeline-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  min-width: 0;
}

.timeline-content h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

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

.timeline-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.meta-block {
  min-width: 0;
}

.meta-block h3 {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.meta-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-block li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  padding: 4px 0;
  min-width: 0;
  word-break: break-word;
}

.meta-block li::before {
  content: "— ";
  color: var(--accent-yellow);
}

.next-step {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
  text-align: center;
}

.next-step h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.next-step p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto 24px;
}

.action-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   PAGES — 合作咨询页
   ============================================================ */
.contact-layout {
  grid-template-columns: minmax(0, 1fr) 360px;
}

.cooperation-flow {
  min-width: 0;
}

.cooperation-flow h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-lead {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.flow-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-color);
  min-width: 0;
}

.flow-step:last-child {
  border-bottom: none;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: var(--radius-sm);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content {
  min-width: 0;
}

.step-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.step-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.step-prepare {
  margin-top: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.prepare-label {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-yellow);
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}

.step-prepare ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.step-prepare li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.step-prepare li::before {
  content: "▸ ";
  color: var(--accent-cyan);
}

.cooperation-image {
  margin-top: 24px;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

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

.cooperation-image figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-tertiary);
}

.preparation-faq {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.material-list h2,
.faq-section h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.material-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.material-items li {
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  line-height: 1.5;
  min-width: 0;
  word-break: break-word;
}

.material-items li::before {
  content: "✓ ";
  color: var(--accent-cyan);
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  background: var(--bg-secondary);
}

.faq-item summary {
  padding: 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  min-height: 44px;
  line-height: 1.4;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

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

.faq-item p {
  padding: 0 16px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================================
   PAGES — 404 页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: 60vh;
}

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

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

.error-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.error-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.btn-home {
  display: inline-block;
}

/* ============================================================
   RESPONSIVE — 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .overview-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-item {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 24px;
  }

  .content-wrap,
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
  }

  .contact-layout {
    grid-template-columns: minmax(0, 1fr) 320px;
  }

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

  .summary-grid .summary-figure {
    margin-top: 20px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: auto;
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

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

  .main-nav {
    width: 100%;
    gap: 16px;
    flex-wrap: wrap;
  }

  .nav-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    width: 100%;
  }

  .nav-group-title {
    width: 100%;
  }

  .nav-group-links {
    flex-wrap: wrap;
    gap: 4px;
  }

  .nav-link {
    padding: 8px 10px;
    font-size: 14px;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  .page-title {
    font-size: 32px;
  }

  .page-title-desc,
  .page-subtitle {
    padding: 12px 16px 0;
  }

  .breadcrumb {
    padding: 12px 16px 0;
    font-size: 13px;
  }

  .page-header {
    padding: 24px 16px 0;
  }

  .content-wrap,
  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 24px 16px;
  }

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 16px 24px;
  }

  .footer-action {
    justify-content: flex-start;
  }

  .footer-nav {
    grid-template-columns: 1fr 1fr;
  }

  .hero-nav {
    padding: 32px 16px 48px;
  }

  .hero-content h1 {
    font-size: 32px;
  }

  .hero-figure img {
    height: 240px;
  }

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

  .business-overview,
  .role-support,
  .process-teaser {
    padding: 48px 16px;
  }

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

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

  .process-strip {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .overview-figure img {
    height: 220px;
  }

  .service-list {
    padding: 24px 16px;
    gap: 24px;
  }

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

  .service-media {
    order: -1;
  }

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

  .help-guide {
    padding: 32px 16px 48px;
  }

  .help-guide-actions {
    flex-direction: column;
    align-items: center;
  }

  .executive-summary {
    padding: 20px;
  }

  .summary-figure img,
  .executive-summary-media img,
  .media-figure img {
    height: 200px;
  }

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

  .summary-grid .summary-figure {
    margin-top: 20px;
  }

  .process-timeline {
    padding: 24px 16px;
  }

  .process-timeline::before {
    left: 16px;
  }

  .timeline-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 16px;
    padding-bottom: 32px;
  }

  .timeline-number {
    width: 40px;
    height: 40px;
    font-size: 14px;
  }

  .timeline-content {
    padding: 16px;
  }

  .timeline-meta {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .next-step {
    padding: 32px 16px 48px;
  }

  .action-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cooperation-flow h2,
  .material-list h2,
  .faq-section h2 {
    font-size: 22px;
  }

  .flow-step {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 16px;
    padding: 20px 0;
  }

  .step-number {
    width: 40px;
    height: 40px;
    font-size: 14px;
  }

  .cooperation-image img {
    height: 200px;
  }

  .related-links {
    padding: 16px;
    gap: 12px;
  }

  .deliverables-table th,
  .deliverables-table td {
    padding: 10px 12px;
    font-size: 13px;
  }

  .toc {
    padding: 16px;
  }

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

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

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

  .coverage-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }

  .coverage-inner .btn-primary {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .nav-group-links {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .nav-link {
    width: 100%;
  }

  .footer-nav {
    grid-template-columns: 1fr;
  }

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

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

  .overview-figure img {
    height: 180px;
  }

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

  .summary-figure img,
  .executive-summary-media img,
  .media-figure img {
    height: 180px;
  }

  .cooperation-image img {
    height: 180px;
  }

  .timeline-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

  .timeline-number {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }

  .timeline-content {
    padding: 14px;
  }

  .flow-step {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }

  .step-prepare {
    padding: 10px 12px;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}