/* ==========================================================================
   yueyou365.com - 国产吃瓜在线观看 企业视频制作与影像营销服务官网
   整站样式表
   视觉方向：数据新闻风 · 白/米白底 · 深蓝标题 · 橙色强调
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. BASE — 基础变量、重置、全局元素
   -------------------------------------------------------------------------- */
:root {
  --color-ink: #14213D;
  --color-accent: #FCA311;
  --color-bg: #FDFBF7;
  --color-text: #333333;
  --color-line: #E5E5E5;
  --color-white: #FFFFFF;
  --color-muted: #6B7280;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-w: 1140px;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(20, 33, 61, 0.08);
  --shadow-hover: 0 6px 24px rgba(20, 33, 61, 0.12);
  --transition: 0.25s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  color: var(--color-ink);
  line-height: 1.35;
  font-weight: 700;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* 阅读区字号调整 —— A-/A+ 按钮作用于 .site-main 内的正文 */
body.font-sm .site-main {
  font-size: 0.9375rem;
}

body.font-md .site-main {
  font-size: 1rem;
}

body.font-lg .site-main {
  font-size: 1.0625rem;
}

body.font-sm .site-main h1 {
  font-size: 1.875rem;
}

body.font-lg .site-main h1 {
  font-size: 2.125rem;
}

body.font-sm .site-main h2 {
  font-size: 1.375rem;
}

body.font-lg .site-main h2 {
  font-size: 1.625rem;
}

body.font-sm .site-main h3 {
  font-size: 1.0625rem;
}

body.font-lg .site-main h3 {
  font-size: 1.1875rem;
}

/* --------------------------------------------------------------------------
   2. LAYOUT — 全站布局骨架：页头、页脚、主容器、面包屑
   -------------------------------------------------------------------------- */

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

.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 20px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-ink);
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 4px;
  transition: background-color var(--transition), color var(--transition);
}

.nav-link:hover {
  color: var(--color-ink);
  background-color: rgba(252, 163, 17, 0.12);
}

.nav-link.is-current {
  color: var(--color-accent);
  font-weight: 600;
  background-color: rgba(252, 163, 17, 0.1);
}

/* 字号调整控件 */
.font-size-control {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.font-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-line);
  background-color: var(--color-white);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), background-color var(--transition);
}

.font-btn:hover {
  border-color: var(--color-accent);
  background-color: rgba(252, 163, 17, 0.08);
}

/* 汉堡按钮（移动端显示） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 面包屑（统一视觉，所有内页一致） */
.breadcrumb-nav {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.breadcrumb-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 12px 20px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 0.875rem;
  color: var(--color-muted);
}

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

.breadcrumb-list a {
  color: var(--color-ink);
  font-size: 0.875rem;
}

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

/* 内页面包屑（main 内） */
.breadcrumb {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.breadcrumb a {
  color: var(--color-ink);
  font-size: 0.875rem;
}

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

.breadcrumb-sep {
  color: var(--color-muted);
  font-size: 0.875rem;
}

.breadcrumb-current {
  color: var(--color-muted);
  font-size: 0.875rem;
}

/* 主容器 */
.site-main {
  flex: 1;
}

.home-main {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 20px;
}

.inner-main {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 40px 20px 60px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-ink);
  color: #B0B8C9;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 20px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.footer-col h3 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 16px;
  font-family: var(--font-sans);
  font-weight: 600;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul a {
  color: #B0B8C9;
  font-size: 0.875rem;
  transition: color var(--transition);
}

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

.footer-brand .footer-logo {
  display: inline-block;
  margin-bottom: 12px;
}

.footer-brand .brand-name {
  color: var(--color-white);
  font-size: 1.25rem;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #B0B8C9;
  margin-bottom: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px 20px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: #8A93A6;
  margin-bottom: 0;
}

/* 页面标题区（内页统一） */
.page-title-area {
  margin-bottom: 32px;
}

.page-title-wrap {
  margin-bottom: 32px;
}

.page-intro {
  font-size: 1.0625rem;
  color: var(--color-muted);
  max-width: 720px;
  margin-bottom: 0;
}

.page-description {
  font-size: 1.0625rem;
  color: var(--color-muted);
  max-width: 720px;
  margin-top: 8px;
}

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

.page-title {
  font-size: 2.125rem;
  margin-bottom: 8px;
}

/* 页面布局：主内容 + 右侧 aside */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

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

.page-aside {
  min-width: 0;
}

/* 相关链接（内页底部） */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-ink);
}

.related-links-item {
  font-size: 0.875rem;
  color: var(--color-ink);
  padding: 6px 14px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  transition: border-color var(--transition), color var(--transition);
}

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

/* --------------------------------------------------------------------------
   3. COMPONENTS — 通用组件：按钮、表格、卡片、折叠、CTA、来源注释
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), box-shadow var(--transition);
  min-height: 44px;
  border: none;
}

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

.btn-primary:hover {
  background-color: #E08F00;
  color: var(--color-ink);
  box-shadow: 0 4px 16px rgba(252, 163, 17, 0.3);
}

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

.btn-secondary:hover {
  background-color: rgba(20, 33, 61, 0.05);
  color: var(--color-ink);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  background-color: var(--color-accent);
  color: var(--color-ink);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition), box-shadow var(--transition);
  min-height: 44px;
  border: none;
}

.cta-button:hover {
  background-color: #E08F00;
  color: var(--color-ink);
  box-shadow: 0 4px 16px rgba(252, 163, 17, 0.3);
}

/* CTA 区块 */
.cta-section {
  margin-top: 48px;
  background-color: var(--color-ink);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  color: var(--color-white);
}

.cta-content h2 {
  color: var(--color-white);
  margin-bottom: 12px;
  font-size: 1.375rem;
}

.cta-content p {
  color: #B0B8C9;
  margin-bottom: 24px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.cta-content .btn-primary {
  background-color: var(--color-accent);
  color: var(--color-ink);
}

.cta-section p {
  color: #B0B8C9;
}

/* 表格通用 */
.table-wrap,
.table-wrapper,
.schedule-table-wrap,
.scene-compare-wrap,
.matrix-wrap {
  overflow-x: auto;
  margin-bottom: 16px;
}

.compare-table,
.spec-table,
.schedule-table,
.scene-table,
.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  min-width: 640px;
}

.compare-table th,
.compare-table td,
.spec-table th,
.spec-table td,
.schedule-table th,
.schedule-table td,
.scene-table th,
.scene-table td,
.matrix-table th,
.matrix-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}

.compare-table thead th,
.spec-table thead th,
.schedule-table thead th,
.scene-table thead th,
.matrix-table thead th {
  background-color: var(--color-ink);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
}

.compare-table tbody th,
.scene-table tbody th,
.matrix-table tbody th {
  background-color: rgba(252, 163, 17, 0.08);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-ink);
  white-space: nowrap;
}

.compare-table tbody tr:hover,
.spec-table tbody tr:hover,
.schedule-table tbody tr:hover,
.scene-table tbody tr:hover,
.matrix-table tbody tr:hover {
  background-color: rgba(252, 163, 17, 0.04);
}

/* 来源注释 */
.source-note {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-top: 8px;
  margin-bottom: 0;
  line-height: 1.6;
}

/* 折叠（FAQ / 排错） */
details.faq-item,
details.trouble-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-white);
  margin-bottom: 12px;
  overflow: hidden;
}

details.faq-item summary,
details.trouble-item summary {
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background-color var(--transition);
  position: relative;
  padding-right: 44px;
}

details.faq-item summary::after,
details.trouble-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition);
}

details.faq-item[open] summary::after,
details.trouble-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

details.faq-item summary:hover,
details.trouble-item summary:hover {
  background-color: rgba(252, 163, 17, 0.06);
}

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

.faq-answer,
.trouble-content {
  padding: 0 20px 16px;
  border-top: 1px solid var(--color-line);
  padding-top: 16px;
}

.faq-answer p,
.trouble-content p {
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
}

/* 步骤列表 */
.step-list {
  padding-left: 20px;
  list-style: decimal;
}

.step-list li {
  font-size: 0.9375rem;
  margin-bottom: 6px;
  padding-left: 4px;
}

/* 区块头部 */
.section-head {
  margin-bottom: 28px;
}

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

.section-head p {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.section-desc {
  color: var(--color-muted);
  font-size: 0.9375rem;
  max-width: 720px;
}

/* 内容区块 */
.content-section {
  margin-bottom: 40px;
}

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

.content-section p {
  margin-bottom: 16px;
}

/* 场景列表 */
.scene-list li {
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
}

.scene-list h3 {
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.scene-list p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* 交付清单 */
.deliver-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.9375rem;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.deliver-list li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

.deliver-list li:last-child {
  border-bottom: none;
}

/* 侧栏通用 */
.aside-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.aside-section h2 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.aside-section p {
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.aside-section.cta-section {
  background-color: var(--color-ink);
  color: var(--color-white);
  text-align: center;
}

.aside-section.cta-section h2 {
  color: var(--color-white);
}

.aside-section.cta-section p {
  color: #B0B8C9;
}

.aside-section.cta-section .cta-button {
  margin-top: 8px;
}

/* 图片容器 */
.aside-figure {
  margin-bottom: 24px;
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--color-line);
}

.aside-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.aside-figure figcaption {
  padding: 8px 12px;
  font-size: 0.8125rem;
  color: var(--color-muted);
  background-color: var(--color-white);
}

/* 数据图 */
.data-review-figure,
.diagnosis-figure,
.live-figure,
.faq-figure {
  margin: 24px 0;
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--color-line);
}

.data-review-figure img,
.diagnosis-figure img,
.live-figure img,
.faq-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.data-review-figure figcaption,
.diagnosis-figure figcaption,
.live-figure figcaption,
.faq-figure figcaption {
  padding: 8px 12px;
  font-size: 0.8125rem;
  color: var(--color-muted);
  background-color: var(--color-white);
}

/* 隐藏元素 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   4. PAGES — 首页与各内页特有模块
   -------------------------------------------------------------------------- */

/* ---------- 首页 ---------- */

/* Hero */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 60px 0 48px;
}

.hero-content h1 {
  font-size: 2.25rem;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-slogan {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 520px;
}

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

.hero-media {
  min-width: 0;
}

.hero-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--color-line);
  box-shadow: var(--shadow);
}

.hero-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* 服务对比表 */
.service-compare-section {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
}

/* 制作流程 */
.workflow-section {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 16px;
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}

.step-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: var(--color-ink);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 50%;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 案例索引 */
.case-index-section {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
}

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

.case-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.case-card figure {
  overflow: hidden;
  background-color: var(--color-line);
  aspect-ratio: 3 / 2;
}

.case-card figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.case-card:hover figure img {
  transform: scale(1.04);
}

.case-body {
  padding: 16px;
  flex: 1;
}

.case-body h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.case-body p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 首页 CTA */
.home-main .cta-section {
  margin: 48px 0;
}

/* ---------- 企业宣传片（服务页 A 型） ---------- */

/* 六阶段流程（垂直） */
.process-list {
  list-style: none;
}

.process-list li {
  position: relative;
  padding-left: 56px;
  padding-bottom: 28px;
  border-left: 2px solid var(--color-line);
}

.process-list li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.process-list li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.process-list h3 {
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.process-list p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.process-time {
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 600;
}

.check-node {
  font-size: 0.8125rem;
  color: var(--color-muted);
  display: block;
  margin-top: 4px;
}

/* ---------- 产品视频（服务页 B 型） ---------- */

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

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

.category-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.category-figure {
  overflow: hidden;
  background-color: var(--color-line);
  aspect-ratio: 16 / 10;
}

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

.category-card h3 {
  font-size: 1rem;
  padding: 14px 16px 4px;
}

.category-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
  padding: 0 16px 14px;
  margin-bottom: 0;
  line-height: 1.6;
}

/* 五步流程（横向） */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.flow-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.flow-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.flow-step .step-num {
  margin-bottom: 10px;
}

.flow-step h3 {
  font-size: 0.9375rem;
  margin-bottom: 6px;
}

.flow-step p {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 交付内容 */
.deliverable-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.deliverable-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  transition: box-shadow var(--transition);
}

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

.deliverable-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.deliverable-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ---------- 短视频代运营（服务页 C 型） ---------- */

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

.boundary-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px 20px;
  border-left: 3px solid var(--color-accent);
}

.boundary-list h3 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
}

.boundary-list p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 数据复盘流程 */
.review-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.review-steps li {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: box-shadow var(--transition);
}

.review-steps li:hover {
  box-shadow: var(--shadow-hover);
}

.review-steps h3 {
  font-size: 0.9375rem;
  margin-bottom: 6px;
}

.review-steps p {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 汇报机制 */
.report-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.report-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.report-list h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.report-list p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ---------- 直播策划（服务页 D 型） ---------- */

/* 执行分工矩阵 */
.matrix-table {
  min-width: 640px;
}

/* 复盘报告 */
.review-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.review-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px;
  transition: box-shadow var(--transition);
}

.review-item:hover {
  box-shadow: var(--shadow-hover);
}

.review-item h3 {
  font-size: 0.9375rem;
  margin-bottom: 6px;
}

.review-item p {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 直播图片 */
.live-image-section {
  margin: 32px 0;
}

.live-figure {
  margin: 0;
}

/* ---------- 影像诊断（研究项目页） ---------- */

.diagnosis-section {
  margin-bottom: 32px;
}

.diagnosis-section h2 {
  font-size: 1.375rem;
  margin-bottom: 12px;
}

.diagnosis-section p {
  font-size: 0.9375rem;
  margin-bottom: 12px;
}

/* 研究问题 */
.question-list {
  margin-bottom: 16px;
}

.question-list li {
  padding: 12px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  margin-bottom: 8px;
  font-size: 0.9375rem;
  position: relative;
  padding-left: 40px;
}

.question-list li::before {
  content: "Q";
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  background-color: var(--color-accent);
  color: var(--color-ink);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 方法阶段 */
.method-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.method-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  border-top: 3px solid var(--color-accent);
}

.method-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.method-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.method-output {
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 600;
  display: block;
  margin-top: 12px;
}

/* 进展时间线 */
.progress-timeline {
  position: relative;
  padding-left: 32px;
}

.progress-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-line);
}

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

.progress-timeline li::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.progress-timeline h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.progress-timeline p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* 公开成果 */
.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.result-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.result-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.result-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.result-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 诊断 CTA */
.diagnosis-cta-section {
  background-color: var(--color-ink);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  margin-top: 32px;
}

.diagnosis-cta-section p {
  color: #B0B8C9;
  margin-bottom: 24px;
}

.cta-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.cta-link {
  color: var(--color-accent);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 12px 20px;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: background-color var(--transition), color var(--transition);
}

.cta-link:hover {
  background-color: var(--color-accent);
  color: var(--color-ink);
}

/* ---------- 制作支持 ---------- */

.support-section {
  margin-bottom: 40px;
}

.support-section h2 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

/* 问题分类 */
.problem-category-section .category-grid {
  grid-template-columns: repeat(4, 1fr);
}

.category-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
}

/* 支持信息规范 */
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.info-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.info-item h3 {
  font-size: 0.9375rem;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.info-item p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 相关指南 */
.guide-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.guide-list li a {
  display: block;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.guide-list li a:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
}

/* ---------- 常见问题 ---------- */

.title-container p {
  font-size: 1.0625rem;
  color: var(--color-muted);
  max-width: 720px;
}

.title-container a {
  color: var(--color-accent);
  font-weight: 600;
}

.faq-hero-image {
  margin-bottom: 32px;
}

.faq-figure {
  margin: 0;
}

.faq-category {
  margin-bottom: 40px;
}

.category-header {
  margin-bottom: 20px;
}

.category-header h2 {
  font-size: 1.375rem;
  margin-bottom: 4px;
}

.category-header p {
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.faq-list {
  margin-bottom: 16px;
}

.faq-support-entry {
  margin: 40px 0;
  background-color: var(--color-ink);
  border-radius: var(--radius);
  padding: 32px 40px;
}

.support-entry-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.support-entry-text h2 {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.support-entry-text p {
  color: #B0B8C9;
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* ---------- 404 页 ---------- */

.error-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
}

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

.error-code {
  font-family: var(--font-serif);
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 8px;
}

.error-section h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-desc {
  color: var(--color-muted);
  font-size: 0.9375rem;
  margin-bottom: 24px;
}

.error-actions {
  margin-bottom: 32px;
}

.error-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: var(--color-accent);
  color: var(--color-ink);
  font-weight: 600;
  border-radius: 4px;
  min-height: 44px;
  transition: background-color var(--transition), box-shadow var(--transition);
}

.error-link:hover {
  background-color: #E08F00;
  color: var(--color-ink);
  box-shadow: 0 4px 16px rgba(252, 163, 17, 0.3);
}

.error-guide h2 {
  font-size: 1.125rem;
  margin-bottom: 16px;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.error-links a {
  display: block;
  padding: 10px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  font-size: 0.875rem;
  transition: border-color var(--transition), color var(--transition);
}

.error-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   5. RESPONSIVE — 响应式断点
   -------------------------------------------------------------------------- */

/* 平板 */
@media (max-width: 1024px) {
  .workflow-steps {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

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

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

  .review-steps {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .review-list {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

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

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 28px;
  }
}

/* 移动端 */
@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  /* 移动导航：按钮显示，列表收起 */
  .nav-toggle {
    display: flex;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 16px;
  }

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

  .nav-link {
    display: block;
    padding: 12px 8px;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-line);
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .font-size-control {
    margin-left: auto;
  }

  .brand-tagline {
    display: none;
  }

  /* Hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 0 32px;
  }

  .hero-content h1 {
    font-size: 1.75rem;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  /* 网格降为单列或双列 */
  .workflow-steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

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

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

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

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

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

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

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

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

  .error-links {
    grid-template-columns: 1fr;
  }

  /* 页面布局：主内容在前，aside 在后 */
  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-aside {
    order: 2;
  }

  .main-content {
    order: 1;
  }

  /* CTA 区块 */
  .cta-section {
    padding: 28px 20px;
  }

  .diagnosis-cta-section {
    padding: 28px 20px;
  }

  .faq-support-entry {
    padding: 24px 20px;
  }

  .support-entry-inner {
    flex-direction: column;
    text-align: center;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 20px 24px;
  }

  .inner-main {
    padding: 24px 20px 40px;
  }

  .page-title {
    font-size: 1.625rem;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
  }

  /* 表格在移动端保持横向滚动 */
  .table-wrap,
  .table-wrapper,
  .schedule-table-wrap,
  .scene-compare-wrap,
  .matrix-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .compare-table,
  .spec-table,
  .schedule-table,
  .scene-table,
  .matrix-table {
    min-width: 600px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .workflow-steps {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .brand-name {
    font-size: 1.0625rem;
  }

  .font-btn {
    width: 36px;
    height: 36px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

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

  .section-head h2 {
    font-size: 1.25rem;
  }
}

/* 滚动出现动画（渐进增强，不影响初始可见性） */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }
}