/* ==========================================================================
   牛马 AI 建站 · mituidc.com 全站样式
   研究报告风：深蓝 + 灰白 + 金色强调，信息层级分明
   ========================================================================== */

/* ==========================================================================
   Base — 基础样式、变量、重置
   ========================================================================== */

:root {
  --color-primary: #1a2a3a;
  --color-primary-light: #2a3d52;
  --color-primary-dark: #101c28;
  --color-bg: #f5f7fa;
  --color-bg-white: #ffffff;
  --color-border: #e2e6ec;
  --color-border-light: #edf0f4;
  --color-text: #333333;
  --color-text-light: #5a6a7a;
  --color-text-muted: #8a97a5;
  --color-accent: #c9a96e;
  --color-accent-dark: #b08d4f;
  --color-accent-light: #e8d9b8;
  --font-serif: "Noto Serif SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(26, 42, 58, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 42, 58, 0.1);
  --transition-base: 0.2s ease;
  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  line-height: 1.4;
}

h1 {
  font-size: 32px;
  font-weight: 700;
}

h2 {
  font-size: 24px;
  font-weight: 700;
}

h3 {
  font-size: 18px;
  font-weight: 600;
}

p {
  margin-bottom: 12px;
}

/* 统一容器 */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 图片容器 */
figure {
  margin: 0;
}

/* 表格基础 */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

th,
td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

th {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-bg);
  white-space: nowrap;
}

/* ==========================================================================
   Layout — 全站布局骨架
   ========================================================================== */

/* 页头 */
.site-header {
  background-color: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand-link {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  color: #ffffff;
  flex-shrink: 0;
}

.brand-link:hover {
  color: var(--color-accent);
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 2px;
}

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

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

.nav-list li {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-link:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.is-current {
  color: var(--color-accent);
  background-color: rgba(255, 255, 255, 0.06);
  font-weight: 600;
}

.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

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

/* 主内容区 */
.site-main {
  min-height: 60vh;
}

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 56px;
}

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

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

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

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-border);
}

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

/* 页脚 */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-column h3 {
  font-size: 16px;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

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

.footer-column ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

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

/* 区块标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

/* 按钮 */
.btn-primary,
.btn-secondary,
.btn-back-home {
  display: inline-block;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  min-height: 44px;
  line-height: 1.4;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

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

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

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

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

.btn-back-home {
  background-color: var(--color-primary);
  color: #ffffff;
  margin-top: 16px;
}

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

/* 数据表格 */
.data-table {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table th {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 28px;
  white-space: nowrap;
}

.data-table th.sort-asc::after,
.data-table th.sort-desc::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
}

.data-table th.sort-asc::after {
  border-bottom: 6px solid var(--color-accent);
  transform: translateY(-60%);
}

.data-table th.sort-desc::after {
  border-top: 6px solid var(--color-accent);
  transform: translateY(-40%);
}

.data-table tbody tr:hover {
  background-color: rgba(201, 169, 110, 0.06);
}

.table-note {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 10px;
  margin-bottom: 0;
  line-height: 1.6;
}

/* 可排序表格带 .sortable-table 的列头 */
.sortable-table th[role="columnheader"] {
  cursor: pointer;
}

/* 流程节点 */
.step-item {
  text-align: center;
  padding: 20px 16px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 10px;
}

.step-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 20px;
  flex-shrink: 0;
  padding: 0 4px;
}

.step-arrow::after {
  content: "→";
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
  line-height: 1.5;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-accent);
  font-weight: 400;
  transition: transform var(--transition-base);
}

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-border-light);
  background-color: rgba(201, 169, 110, 0.04);
}

.faq-answer {
  padding: 16px 20px;
}

.faq-answer p {
  margin-bottom: 10px;
  line-height: 1.8;
}

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

/* 关联链接 */
.related-links {
  margin-top: 40px;
  padding: 20px 24px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-right: 4px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-text);
  padding: 4px 12px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

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

/* 侧栏 */
.sidebar {
  min-width: 0;
}

.sidebar-block {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 24px;
}

.sidebar-block h2 {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-list li {
  margin-bottom: 6px;
}

.sidebar-list li a {
  display: block;
  padding: 6px 10px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
}

.sidebar-list li a:hover {
  color: var(--color-accent-dark);
  background-color: var(--color-bg);
  border-left-color: var(--color-accent);
}

/* 图片容器 */
.content-media,
.media-figure,
.scenario-figure,
.service-image-block,
.about-intro-figure,
.method-figure,
.process-figure,
.page-end-figure {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-border-light);
}

.content-media img,
.media-figure img,
.scenario-figure img,
.service-image-block img,
.about-intro-figure img,
.method-figure img,
.process-figure img,
.page-end-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media figcaption,
.media-figure figcaption,
.scenario-figure figcaption,
.service-image-block figcaption,
.about-intro-figure figcaption,
.method-figure figcaption,
.process-figure figcaption,
.page-end-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
  line-height: 1.6;
}

/* ==========================================================================
   Pages — 首页
   ========================================================================== */

/* 首屏 */
.hero-section {
  padding: 48px 0 40px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.hero-copy h1 {
  font-size: 36px;
  line-height: 1.35;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

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

.hero-table-wrap {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
}

.hero-table-wrap .section-title {
  font-size: 20px;
  margin-bottom: 16px;
}

/* 首屏主图 */
.content-media-primary {
  margin-top: 40px;
  position: relative;
  aspect-ratio: 16 / 5;
}

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

.content-media-primary figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(26, 42, 58, 0.75);
  color: #ffffff;
  border-top: none;
}

/* 服务分区 */
.service-zones {
  padding: 48px 0;
}

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

.zone-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.zone-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.zone-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.zone-card p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 14px;
}

.zone-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent-dark);
}

/* 服务全览 */
.service-overview {
  padding: 48px 0;
  background-color: var(--color-bg-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.overview-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 32px;
  align-items: start;
}

.overview-media .media-figure {
  aspect-ratio: 3 / 4;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.overview-list .section-title {
  margin-bottom: 16px;
}

.service-items {
  counter-reset: service-counter;
}

.service-items li {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-border);
  align-items: flex-start;
}

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

.item-number {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  margin-top: 2px;
}

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

.item-content h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.item-content p {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.6;
}

.overview-note .section-title {
  margin-bottom: 12px;
}

.overview-note p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.overview-note .btn-primary {
  margin-top: 8px;
}

/* 重点服务与公告 */
.hot-and-announcement {
  padding: 48px 0;
}

.two-column-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: start;
}

.hot-list li {
  margin-bottom: 10px;
}

.hot-list li a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

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

.announcement-list li {
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-border);
}

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

.announcement-list time {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.announcement-list p {
  font-size: 15px;
  margin: 0;
  line-height: 1.6;
}

/* 合作规则 */
.cooperation-rules {
  padding: 48px 0;
  background-color: var(--color-bg-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

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

.rule-item {
  padding: 20px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
}

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

.rule-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.7;
}

/* 合作流程预览 */
.process-preview {
  padding: 48px 0;
}

.process-preview .process-steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: stretch;
  margin-bottom: 32px;
}

.process-preview .step-item {
  padding: 24px 16px;
}

.process-preview .step-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.process-preview .step-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.6;
}

.process-preview .btn-primary {
  display: block;
  margin: 0 auto;
}

/* FAQ 预览 */
.faq-preview {
  padding: 48px 0;
  background-color: var(--color-bg-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.faq-preview .faq-list {
  max-width: 860px;
  margin-bottom: 24px;
}

/* 方法手册导读 */
.guide-preview {
  padding: 48px 0;
}

.guide-inner {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: rgba(255, 255, 255, 0.9);
  position: relative;
  overflow: hidden;
}

.guide-inner .section-title {
  color: #ffffff;
  margin-bottom: 14px;
}

.guide-inner .section-title::before {
  background-color: var(--color-accent);
}

.guide-inner p {
  font-size: 15px;
  line-height: 1.8;
  max-width: 720px;
  margin-bottom: 24px;
}

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

.guide-inner .btn-primary:hover {
  background-color: var(--color-accent-light);
  color: var(--color-primary);
}

/* ==========================================================================
   Pages — 服务项目 (services.html)
   ========================================================================== */

.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

.page-layout .main-content {
  min-width: 0;
  min-width: 520px;
}

/* 服务索引 */
.service-index {
  margin-bottom: 32px;
}

.index-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.index-list li a {
  display: block;
  padding: 10px 14px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  color: var(--color-primary);
}

.index-list li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
  background-color: var(--color-bg-white);
}

/* 服务配图 */
.service-figure {
  margin-bottom: 32px;
}

.service-image-block {
  aspect-ratio: 16 / 6;
}

/* 服务定义 */
.service-definitions {
  margin-top: 32px;
}

.service-definitions .service-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.service-definitions .service-item h3 {
  font-size: 20px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent-light);
  display: inline-block;
}

.service-def {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.6;
}

.service-definitions .service-item > p:not(.service-def) {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 10px;
}

.service-example {
  background-color: var(--color-bg);
  border-left: 3px solid var(--color-accent);
  padding: 12px 16px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 14px !important;
  color: var(--color-text) !important;
  margin: 12px 0 !important;
}

.service-example::before {
  content: "示例：";
  font-weight: 600;
  color: var(--color-accent-dark);
}

.service-related {
  font-size: 14px !important;
  color: var(--color-text-muted) !important;
}

.service-related a {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* ==========================================================================
   Pages — 服务场景 (scenarios.html)
   ========================================================================== */

.scenario-block {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}

.scenario-block:nth-child(even) {
  grid-template-columns: 1fr 1.5fr;
}

.scenario-block:nth-child(even) .scenario-figure {
  order: -1;
}

.scenario-block:last-of-type {
  border-bottom: none;
}

.scenario-text h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.scenario-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 10px;
}

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

/* 场景映射表 */
.scene-mapping {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 2px solid var(--color-accent);
}

.scene-mapping h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.scene-mapping > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

/* 场景侧栏 */
.scenario-aside {
  min-width: 0;
}

.aside-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 24px;
}

.aside-card h2 {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.aside-card ul li {
  margin-bottom: 8px;
}

.aside-card ul li a {
  font-size: 14px;
  color: var(--color-text);
}

.aside-card ul li a:hover {
  color: var(--color-accent-dark);
}

/* ==========================================================================
   Pages — 合作流程 (process.html)
   ========================================================================== */

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

.page-title-area p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* 流程步骤 */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.step-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  position: relative;
  transition: box-shadow var(--transition-base);
}

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

.step-card .step-number {
  width: 40px;
  height: 40px;
  font-size: 18px;
  margin-bottom: 12px;
  background-color: var(--color-accent);
  color: var(--color-primary);
}

.step-card .step-name {
  font-size: 17px;
  margin-bottom: 8px;
}

.step-card .step-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

/* 交付说明表 */
.deliverables {
  margin-bottom: 40px;
}

.deliverables-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.table-wrapper {
  overflow-x: auto;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.deliverables-table {
  min-width: 720px;
}

.deliverables-table th {
  background-color: var(--color-primary);
  color: #ffffff;
  font-weight: 600;
}

.deliverables-table th:first-child {
  width: 140px;
}

.deliverables-table tbody th {
  background-color: var(--color-bg);
  color: var(--color-primary);
  font-weight: 600;
  text-align: left;
  width: 140px;
}

.deliverables-table td {
  font-size: 14px;
  line-height: 1.7;
}

/* 流程图 */
.process-figure {
  aspect-ratio: 16 / 5;
  margin-bottom: 40px;
}

/* 合作说明 */
.cooperation-notes {
  margin-bottom: 40px;
}

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

.note-item {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  border-top: 3px solid var(--color-accent);
}

.note-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.note-body {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.7;
}

/* 关联列表 */
.related-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.related-list li a {
  display: block;
  padding: 14px 16px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  color: var(--color-primary);
}

.related-list li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

/* ==========================================================================
   Pages — 方法手册 (guide.html)
   ========================================================================== */

.page-title-block {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
}

.page-title-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 860px;
}

/* 侧栏在左的布局 */
.sidebar-left {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 40px;
  align-items: start;
}

.sidebar-left .sidebar {
  min-width: 0;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.sidebar-left .main-content {
  min-width: 0;
  min-width: 520px;
}

.sidebar-inner {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.sidebar-inner > h2 {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-nav {
  margin-bottom: 20px;
}

.sidebar-nav .sidebar-list li a {
  border-left: 2px solid transparent;
}

.sidebar-nav .sidebar-list li a:hover {
  border-left-color: var(--color-accent);
}

.sidebar-related {
  border-top: 1px solid var(--color-border-light);
  padding-top: 16px;
}

.sidebar-related h3 {
  font-size: 15px;
  margin-bottom: 10px;
}

/* 方法引导 */
.method-lead {
  margin-bottom: 32px;
  padding: 20px 24px;
  background-color: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* 术语条目 */
.method-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
}

.method-section:last-of-type {
  border-bottom: none;
}

.method-head {
  margin-bottom: 16px;
}

.method-head h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.term-definition {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.6;
  background-color: var(--color-bg);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
}

.method-body p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 10px;
}

.method-example {
  margin: 16px 0;
  padding: 16px 20px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.method-example h3 {
  font-size: 15px;
  color: var(--color-accent-dark);
  margin-bottom: 6px;
}

.method-example p {
  font-size: 14px;
  color: var(--color-text);
  margin: 0;
}

.method-related {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 12px;
}

.method-related a {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* 方法配图 */
.method-figure {
  aspect-ratio: 16 / 5;
  margin-top: 32px;
}

/* ==========================================================================
   Pages — 常见问题 (faq.html)
   ========================================================================== */

.page-intro {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

/* 问题分类 */
.faq-categories {
  margin-bottom: 40px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

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

.category-name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.category-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* FAQ 列表 */
.faq-list {
  margin-bottom: 40px;
}

.faq-list .faq-item {
  margin-bottom: 10px;
}

/* 关联卡片 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

.related-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.related-name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.related-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 页尾配图 */
.page-end-figure {
  aspect-ratio: 16 / 4;
  margin-top: 40px;
  position: relative;
}

.page-end-figure figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(26, 42, 58, 0.75);
  color: #ffffff;
  border-top: none;
}

/* ==========================================================================
   Pages — 关于我们 (about.html)
   ========================================================================== */

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

.page-title-intro {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 860px;
}

/* 企业介绍 */
.about-intro {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
}

.about-intro-text h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

.about-intro-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 10px;
}

.about-intro-figure {
  aspect-ratio: 4 / 3;
}

/* 服务边界 */
.boundary-list {
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}

.boundary-list h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

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

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

.boundary-item {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  border-left: 3px solid var(--color-accent);
}

.boundary-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.boundary-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.7;
}

/* 服务原则 */
.principles {
  padding: 40px 0;
}

.principles h2 {
  font-size: 22px;
  margin-bottom: 24px;
}

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

.principle-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: left;
  position: relative;
}

.principle-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 0 0 2px 2px;
}

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

.principle-card p {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.7;
}

/* 关联链接 */
.related-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-link-list a {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.related-link-list a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

/* ==========================================================================
   Pages — 404
   ========================================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-section {
  text-align: center;
  max-width: 480px;
  padding: 48px 40px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

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

.error-section h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-section p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

/* ==========================================================================
   Responsive — 响应式
   ========================================================================== */

/* 平板 */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .overview-note {
    grid-column: 1 / -1;
  }

  .page-layout {
    grid-template-columns: 1fr 260px;
    gap: 24px;
  }

  .sidebar-left {
    grid-template-columns: 260px 1fr;
    gap: 24px;
  }

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

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

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

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

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

/* 手机端 */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 60px;
  }

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

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

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    flex-direction: column;
    padding: 8px 16px 16px;
    border-bottom: 3px solid var(--color-accent);
    box-shadow: var(--shadow-md);
    z-index: 99;
    gap: 0;
  }

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

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

  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 15px;
  }

  .nav-link.is-current::after {
    display: none;
  }

  .home-main,
  .inner-main {
    padding: 24px 16px 40px;
  }

  .container {
    padding: 0 16px;
  }

  .hero-section {
    padding: 24px 0;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .content-media-primary {
    aspect-ratio: 4 / 3;
  }

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

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

  .overview-note {
    grid-column: auto;
  }

  .overview-media .media-figure {
    aspect-ratio: 16 / 9;
    position: static;
  }

  .two-column-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .step-arrow {
    transform: rotate(90deg);
    padding: 4px 0;
  }

  .guide-inner {
    padding: 24px;
  }

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

  .footer-bottom {
    padding: 12px 16px;
  }

  /* 内页 */
  .page-header {
    margin-bottom: 16px;
  }

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

  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .sidebar-left .sidebar {
    position: static;
    order: 2;
  }

  .sidebar-left .main-content {
    order: 1;
  }

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

  .service-image-block {
    aspect-ratio: 16 / 9;
  }

  /* 场景 */
  .scenario-block {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .scenario-block:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .scenario-block:nth-child(even) .scenario-figure {
    order: 0;
  }

  .scenario-figure {
    aspect-ratio: 16 / 9;
  }

  .scene-mapping {
    overflow-x: auto;
  }

  .scene-mapping .data-table {
    min-width: 560px;
  }

  /* 流程 */
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

  .related-list {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  /* 方法手册 */
  .method-figure {
    aspect-ratio: 4 / 3;
  }

  /* FAQ */
  .category-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

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

  .page-end-figure {
    aspect-ratio: 16 / 9;
  }

  /* 关于 */
  .about-intro {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .about-intro-figure {
    aspect-ratio: 16 / 9;
  }

  .boundary-items {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .related-link-list {
    flex-direction: column;
  }

  .related-link-list a {
    text-align: center;
  }
}

/* 小手机 */
@media (max-width: 480px) {
  .brand-tagline {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    text-align: center;
  }

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

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

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

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

  .process-preview .btn-primary {
    width: 100%;
    text-align: center;
  }
}