/* ==========================================================================
   星空无限传媒 - 整站样式表
   fzshunan.com
   视觉方向：建筑事务所风 · 冷调克制 · 深蓝灰白
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Base — 重置、变量、全局基础
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #16263F;
  --color-bg: #F4F6F8;
  --color-bg-light: #E8ECEF;
  --color-accent: #D96A3C;
  --color-text: #333C48;
  --color-text-light: #5C6672;
  --color-white: #FFFFFF;
  --color-border: #D6DCE1;

  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --container-width: 1200px;
  --sidebar-width: 240px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   2. Layout — 布局骨架、容器、通用网格
   -------------------------------------------------------------------------- */
.layout-shell {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 内页双栏布局：侧栏 + 主内容 */
.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.page-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

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

.sidebar-inner {
  /* 与 .page-sidebar 相同的容器样式，用于 process.html 的特殊 DOM */
}

.sidebar-title,
.sidebar-nav h2,
.toc-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.sidebar-list,
.toc-list {
  list-style: none;
  list-style-position: outside;
  padding: 0;
  margin: 0;
}

.sidebar-list li,
.toc-list li {
  margin-bottom: 4px;
}

.sidebar-list a,
.toc-list a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
}

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

/* 主内容区 */
.site-main {
  min-width: 0;
}

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

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

/* --------------------------------------------------------------------------
   3. Components — 通用组件
   -------------------------------------------------------------------------- */

/* 3.1 页头与导航 */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-shell {
  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);
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 12px;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  position: relative;
  transition: background-color var(--transition-fast);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.nav-toggle-icon::before {
  top: -8px;
}

.nav-toggle-icon::after {
  top: 8px;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 4px;
}

.nav-list li {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

.nav-list a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  background-color: var(--color-bg);
}

/* 分组下拉菜单 */
.dropdown-group {
  position: relative;
}

.dropdown-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(22, 38, 63, 0.08);
  padding: 8px 0;
  z-index: 50;
}

.dropdown-group:hover .dropdown-panel {
  display: block;
}

.dropdown-panel a {
  display: block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-text);
  white-space: nowrap;
}

.dropdown-panel a:hover {
  color: var(--color-accent);
  background-color: var(--color-bg);
}

/* 3.2 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background-color: #1F3452;
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border-color: var(--color-white);
}

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

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

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

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

/* 3.3 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

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

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

.breadcrumb-sep {
  margin: 0 8px;
  color: var(--color-text-light);
}

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

/* 3.4 图片与图文容器 */
figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-top: 8px;
  text-align: center;
}

img {
  border-radius: var(--radius-md);
}

/* 3.5 相关链接 */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.related-links-item {
  display: inline-block;
  margin-right: 16px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--color-text-light);
  border-bottom: 1px solid transparent;
}

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

/* 3.6 FAQ 手风琴 */
details.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  background-color: var(--color-white);
  overflow: hidden;
}

details.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: background-color var(--transition-fast);
}

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

details.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 300;
  color: var(--color-accent);
  transition: transform var(--transition-normal);
}

details.faq-item[open] summary {
  background-color: var(--color-bg);
}

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

.faq-answer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.faq-answer a {
  color: var(--color-accent);
  text-decoration: underline;
}

/* 3.7 表格 */
.execution-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}

.execution-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.execution-table caption {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  padding: 12px 16px;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.execution-table thead th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 500;
  text-align: left;
  padding: 12px 16px;
  white-space: nowrap;
}

.execution-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: top;
}

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

.execution-table tbody tr:nth-child(even) {
  background-color: var(--color-bg);
}

/* 3.8 内容区块通用 */
.content-section {
  margin-bottom: 48px;
}

.content-section h2 {
  font-size: 24px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.content-section h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.content-section .section-text {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.section-title {
  font-size: 24px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

/* 3.9 滚动渐显动画（不影响初始可见性） */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   4. Pages — 页面专属样式
   -------------------------------------------------------------------------- */

/* 4.1 首页 */
.site-home {
  background-color: var(--color-bg);
}

.home-main {
  padding-bottom: 0;
}

/* 首屏主视觉 */
.hero-section {
  position: relative;
  background-color: var(--color-primary);
  overflow: hidden;
}

.hero-visual {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
}

.hero-visual::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(22, 38, 63, 0.75);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 120px 24px;
  color: var(--color-white);
}

.hero-title {
  font-size: 48px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: 20px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 12px;
}

.hero-description {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin-bottom: 32px;
}

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

/* 首页首屏配图 */
.content-media-primary {
  position: relative;
  z-index: 1;
  max-width: var(--container-width);
  margin: -80px auto 0;
  padding: 0 24px;
}

.content-media-primary img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(22, 38, 63, 0.15);
}

.content-media-primary figcaption {
  background-color: var(--color-white);
  padding: 8px 16px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  margin-top: 0;
}

/* 区块通用间距 */
.section-padding {
  padding: 80px 0;
}

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

.section-heading h2 {
  font-size: 30px;
  margin-bottom: 12px;
}

.section-heading p {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
}

/* 服务矩阵摘要 */
.service-summary {
  background-color: var(--color-white);
}

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

.service-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  background-color: var(--color-white);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.service-card:hover {
  box-shadow: 0 8px 24px rgba(22, 38, 63, 0.08);
  transform: translateY(-4px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 24px;
  color: var(--color-accent);
}

.service-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

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

.service-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.service-card a:hover {
  text-decoration: underline;
}

/* 合作流程预览 */
.process-preview {
  background-color: var(--color-bg);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.process-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
}

.process-step .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-white);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

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

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

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.text-link:hover {
  border-bottom-color: var(--color-accent);
}

/* 常见问题入口 */
.faq-teaser {
  background-color: var(--color-white);
}

.faq-teaser-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.faq-teaser-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  background-color: var(--color-bg);
  transition: border-color var(--transition-fast);
}

.faq-teaser-item:hover {
  border-color: var(--color-accent);
}

.faq-teaser-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.faq-teaser-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
  line-height: 1.7;
}

.faq-teaser-item a {
  font-size: 14px;
  color: var(--color-accent);
}

.faq-teaser-item a:hover {
  text-decoration: underline;
}

/* 行动引导横幅 */
.cta-banner {
  background-color: var(--color-primary);
  padding: 80px 0;
}

.cta-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.cta-content h2 {
  font-size: 32px;
  color: var(--color-white);
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 首页相关链接 */
.home-main .related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  border-top: none;
}

/* 4.2 解决方案页 */
.page-solutions {
  background-color: var(--color-bg);
}

.service-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  margin-bottom: 64px;
  padding: 40px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.service-text {
  min-width: 0;
}

.service-text h2 {
  font-size: 24px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.service-text p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.service-text h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 20px 0 8px;
}

.scene-list,
.deliverable-list {
  list-style: none;
  padding: 0;
  margin: 0 0 12px;
}

.scene-list li,
.deliverable-list li {
  position: relative;
  padding: 6px 0 6px 20px;
  font-size: 15px;
  line-height: 1.7;
}

.scene-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 500;
}

.deliverable-list li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-size: 18px;
}

.section-link {
  margin-top: 16px;
}

.section-link a {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
}

.section-link a:hover {
  text-decoration: underline;
}

.service-figure {
  min-width: 0;
}

.service-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.service-note {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 48px;
}

.service-note h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

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

/* 4.3 合作流程页 */
.page-process {
  background-color: var(--color-bg);
}

.flow-section {
  margin-bottom: 56px;
  padding: 40px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.flow-section h2 {
  font-size: 24px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

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

.section-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 20px;
}

.grid-item {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 20px;
}

.grid-item h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.grid-item ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.grid-item li {
  position: relative;
  padding: 6px 0 6px 20px;
  font-size: 14px;
  line-height: 1.7;
}

.grid-item li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.section-output {
  font-size: 14px;
  line-height: 1.7;
  background-color: var(--color-bg-light);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-top: 16px;
}

.section-output strong {
  color: var(--color-primary);
  font-weight: 600;
}

.process-figure {
  margin-top: 48px;
}

.process-figure img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 4.4 常见问题页 */
.page-faq {
  background-color: var(--color-bg);
}

.page-lead-image {
  margin-bottom: 40px;
}

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

.next-step-box {
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 48px;
  color: var(--color-white);
}

.next-step-box h2 {
  font-size: 20px;
  color: var(--color-white);
  margin-bottom: 12px;
}

.next-step-box p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
}

.next-step-box a {
  color: var(--color-white);
  text-decoration: underline;
  margin-right: 16px;
}

.next-step-box a:hover {
  color: var(--color-accent);
}

/* 4.5 关于我们页 */
.page-about {
  background-color: var(--color-bg);
}

.content-figure {
  margin: 24px 0;
}

.content-figure img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.method-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.method-item {
  border-left: 3px solid var(--color-accent);
  padding: 16px 24px;
  margin-bottom: 16px;
  background-color: var(--color-white);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

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

.method-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-light);
}

/* 4.6 合作通道页 */
.page-connect {
  background-color: var(--color-bg);
}

.section-figure {
  margin: 24px 0;
}

.section-figure img {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

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

.material-list li {
  background-color: var(--color-white);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 16px 20px;
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.7;
}

.material-list strong {
  display: block;
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 4px;
}

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

.related-list li {
  margin-bottom: 8px;
}

.related-list a {
  font-size: 15px;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
}

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

/* 4.7 404 页面 */
.site-error {
  background-color: var(--color-bg);
}

.error-main {
  min-height: calc(100vh - var(--header-height) - 300px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

.error-section {
  text-align: center;
  max-width: 600px;
}

.error-code {
  font-size: 96px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
  font-family: var(--font-serif);
}

.error-section h1 {
  font-size: 28px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.error-home-btn {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: background-color var(--transition-fast);
}

.error-home-btn:hover {
  background-color: #1F3452;
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   5. Page Header — 内页页头统一样式
   -------------------------------------------------------------------------- */
.page-header {
  margin-bottom: 40px;
}

.page-header .page-title {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.page-header .page-description {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-light);
  max-width: 720px;
}

.page-description a {
  color: var(--color-accent);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   6. Footer — 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  margin-top: 0;
}

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 32px;
}

.footer-brand {
  margin-bottom: 40px;
}

.footer-tagline {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 480px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-nav-group h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-nav-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav-group li {
  margin-bottom: 10px;
}

.footer-nav-group a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer-nav-group a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom p {
  margin: 0;
}

/* --------------------------------------------------------------------------
   7. Responsive — 响应式
   -------------------------------------------------------------------------- */

/* 平板及以下 */
@media (max-width: 1024px) {
  .service-section {
    grid-template-columns: 1fr;
  }

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

/* 移动端断点 768px */
@media (max-width: 768px) {
  .layout-shell,
  .header-shell,
  .footer-shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 导航切换 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(22, 38, 63, 0.08);
  }

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

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

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

  .nav-list a {
    padding: 14px 24px;
    border-radius: 0;
    border-left: 3px solid transparent;
  }

  .nav-list a.is-current {
    border-left-color: var(--color-accent);
  }

  .dropdown-panel {
    position: static;
    display: none;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--color-border);
    margin-left: 24px;
    padding: 0;
  }

  .dropdown-group.is-open .dropdown-panel {
    display: block;
  }

  /* 双栏改单栏 */
  .sidebar-left,
  .page-layout {
    display: block;
  }

  .page-sidebar,
  .page-toc {
    position: static;
    margin-bottom: 32px;
    display: none;
  }

  /* 移动端侧栏作为抽屉，默认收起 */
  .page-sidebar.is-open,
  .page-toc.is-open {
    display: block;
  }

  /* 首页区块 */
  .hero-content {
    padding: 80px 16px;
  }

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

  .hero-subtitle {
    font-size: 18px;
  }

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

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

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

  .content-media-primary {
    margin-top: -40px;
    padding: 0 16px;
  }

  .content-media-primary img {
    height: 200px;
  }

  .section-padding {
    padding: 48px 0;
  }

  .section-heading h2 {
    font-size: 24px;
  }

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

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

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

  .cta-banner {
    padding: 48px 0;
  }

  .cta-content h2 {
    font-size: 24px;
  }

  /* 内页 */
  .inner-main {
    padding-top: 0;
  }

  .breadcrumb {
    margin-bottom: 16px;
  }

  .page-header .page-title {
    font-size: 26px;
  }

  .page-header .page-description {
    font-size: 15px;
  }

  /* 解决方案 */
  .service-section {
    padding: 24px;
    gap: 24px;
  }

  .service-text h2 {
    font-size: 20px;
  }

  /* 合作流程 */
  .flow-section {
    padding: 24px;
  }

  .flow-section h2 {
    font-size: 20px;
  }

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

  .grid-item {
    padding: 16px;
  }

  /* FAQ */
  .faq-item summary {
    font-size: 15px;
    padding: 14px 40px 14px 16px;
  }

  .faq-answer {
    padding: 14px 16px;
  }

  /* 关于我们 */
  .method-item {
    padding: 14px 16px;
  }

  /* 页脚 */
  .footer-shell {
    padding-top: 48px;
  }

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

  .error-code {
    font-size: 64px;
  }
}

/* 小屏手机额外调整 */
@media (max-width: 390px) {
  .brand-name {
    font-size: 18px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .service-card {
    padding: 24px 20px;
  }

  .process-step {
    padding: 20px;
  }

  .faq-teaser-item {
    padding: 20px;
  }
}