/* ==========================================================================
   九一黑料 - 全站样式表
   版本：1.0
   说明：本文件为 mhlogistics.cn 全站唯一样式表，覆盖首页、内页、404 页。
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base - 基础变量、重置、全局字体与颜色
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1f3a5f;
  --color-primary-dark: #162a45;
  --color-accent: #e67e22;
  --color-accent-dark: #c96a1a;
  --color-bg: #f7f5f2;
  --color-text: #333333;
  --color-border: #d9dde3;
  --color-white: #ffffff;
  --color-muted: #6b7280;
  --color-light-blue: #eef2f7;
  --font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --transition-base: all 0.25s ease;
}

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

html {
  font-size: 16px;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

ul,
ol {
  list-style: none;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 20px;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
}

/* --------------------------------------------------------------------------
   Layout - 全站骨架布局：页头、主容器、页脚、面包屑
   -------------------------------------------------------------------------- */

/* 页头 */
.site-header {
  background-color: var(--color-primary);
  height: var(--header-height);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-white);
  white-space: nowrap;
}

.brand-name a {
  color: var(--color-white);
}

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

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

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

.site-nav ul li a {
  display: block;
  padding: 8px 14px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.site-nav ul li a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.site-nav ul li a.is-current {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.15);
}

/* 汉堡按钮 - 默认隐藏 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
}

/* 主内容容器 */
.site-main {
  flex: 1;
}

/* 内页两栏布局 */
.layout-shell,
.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 20px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

/* 内页主内容 */
.inner-main {
  min-width: 0;
  min-height: 400px;
}

/* 面包屑 */
.breadcrumb,
.breadcrumb-nav {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.breadcrumb-nav .breadcrumb-list,
.breadcrumb-nav .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb-nav ol,
.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb-nav li,
.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a,
.breadcrumb-nav a {
  color: var(--color-primary);
}

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

.breadcrumb-sep,
.breadcrumb-current {
  color: var(--color-muted);
}

/* 页面标题区 */
.page-header {
  margin-bottom: 16px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.page-title-area,
.page-title-area p,
.page-title p,
.page-heading p,
.page-summary {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 720px;
}

/* 内页侧栏 */
.sidebar,
.sidebar-area,
.page-sidebar {
  min-width: 0;
}

.sidebar > h2,
.sidebar-area > h2,
.page-sidebar > h2,
.sidebar-block h2,
.sidebar-module h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.sidebar-links li,
.sidebar-block ul li,
.sidebar-module ul li {
  margin-bottom: 4px;
}

.sidebar-links a,
.sidebar-block ul li a,
.sidebar-module ul li a {
  display: block;
  padding: 10px 12px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
  border-left: 3px solid transparent;
}

.sidebar-links a:hover,
.sidebar-block ul li a:hover,
.sidebar-module ul li a:hover {
  color: var(--color-primary);
  background-color: var(--color-light-blue);
  border-left-color: var(--color-accent);
}

/* 页脚 */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr) 1.5fr;
  gap: 40px;
}

.footer-col h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
}

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

.footer-brand h2 {
  color: var(--color-white);
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

.copyright {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}

/* --------------------------------------------------------------------------
   Components - 通用组件：按钮、标签、卡片、表格、FAQ、步骤条
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn-primary,
.btn-secondary,
.btn-back {
  display: inline-block;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: var(--transition-base);
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

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

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

/* 状态标签 */
.status-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  background-color: var(--color-light-blue);
  color: var(--color-primary);
  white-space: nowrap;
}

/* 能力卡片 */
.capability-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition-base);
}

.capability-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.capability-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.capability-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.capability-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

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

/* 能力图标 */
.capability-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.capability-icon span {
  font-size: 24px;
  line-height: 1;
  color: var(--color-primary);
}

/* 步骤条 */
.step-list {
  counter-reset: step-counter;
}

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

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

.step-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 表格 */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 14px;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
}

.comparison-table th {
  background-color: var(--color-light-blue);
  font-weight: 700;
  color: var(--color-primary);
}

.comparison-table td {
  background-color: var(--color-white);
}

.comparison-table tr:first-child th:first-child {
  border-top-left-radius: var(--radius-md);
}

.comparison-table tr:first-child th:last-child {
  border-top-right-radius: var(--radius-md);
}

.table-note {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 12px;
}

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

.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: var(--transition-base);
}

.faq-item summary:hover {
  background-color: var(--color-light-blue);
}

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

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

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-border);
}

.faq-answer {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-muted);
}

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

.faq-answer a {
  color: var(--color-primary);
  font-weight: 600;
}

/* 图片容器 */
.content-media,
.content-media-inline,
.content-media-primary,
.hero-media,
.method-figure,
.review-figure,
.improvement-figure,
.team-figure,
.faq-visual,
.content-figure,
.sidebar-image figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-light-blue);
}

.content-media img,
.content-media-inline img,
.content-media-primary img,
.hero-media img,
.method-figure img,
.review-figure img,
.improvement-figure img,
.team-figure img,
.faq-visual img,
.content-figure img,
.sidebar-image figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-white);
}

/* 相关链接导航 */
.related-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.related-links-label {
  font-weight: 700;
  color: var(--color-text);
  margin-right: 8px;
}

.related-links-item {
  display: inline-block;
  padding: 6px 14px;
  background-color: var(--color-light-blue);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
}

.related-links-item:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Pages - 首页专属模块
   -------------------------------------------------------------------------- */

/* Hero 区域 */
.hero-section {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 64px 0;
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.hero-content h1 {
  font-size: 36px;
  color: var(--color-white);
  margin-bottom: 16px;
  max-width: 640px;
}

.hero-lead {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  max-width: 560px;
}

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

.hero-content .btn-primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(230, 126, 34, 0.3);
}

/* 首页主媒体 */
.content-media-primary {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 0 20px;
}

.content-media-primary img {
  border-radius: var(--radius-lg);
}

/* 首页两栏布局 */
.homepage-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

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

/* 首页各模块 */
.capabilities-overview,
.announcements,
.plan-comparison,
.faq-preview {
  margin-bottom: 48px;
}

.capabilities-overview h2,
.announcements h2,
.plan-comparison h2,
.faq-preview h2 {
  margin-bottom: 8px;
}

.section-intro {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 24px;
}

/* 能力网格 */
.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* 公告列表 */
.announcement-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

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

.announcement-list a {
  flex: 1;
  min-width: 200px;
  font-weight: 500;
  color: var(--color-text);
}

.announcement-list a:hover {
  color: var(--color-primary);
}

.announcement-list time {
  font-size: 13px;
  color: var(--color-muted);
  white-space: nowrap;
}

/* FAQ 预览 */
.faq-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.faq-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition-base);
}

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

.faq-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.faq-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.faq-card a {
  font-size: 14px;
  font-weight: 600;
}

/* 侧栏模块 */
.sidebar > section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar section > h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.sidebar-steps .step-list li {
  padding: 10px 0;
}

.sidebar-steps .btn-secondary {
  width: 100%;
  margin-top: 16px;
}

/* --------------------------------------------------------------------------
   Pages - 核心能力页
   -------------------------------------------------------------------------- */

.page-capabilities .capability-matrix {
  margin-bottom: 48px;
}

.page-capabilities .capability-matrix h2,
.page-capabilities .capability-scenarios h2,
.page-capabilities .capability-notes h2 {
  margin-bottom: 16px;
}

.content-media-inline {
  margin-bottom: 24px;
}

.capability-scenarios {
  margin-bottom: 48px;
}

.scenario-list {
  display: grid;
  gap: 16px;
}

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

.scenario-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.scenario-item p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
}

.capability-notes {
  background-color: var(--color-light-blue);
  border-radius: var(--radius-md);
  padding: 24px;
}

.capability-notes p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.capability-notes p:last-child {
  margin-bottom: 0;
}

/* 侧栏图片 */
.sidebar-image figure {
  margin-top: 24px;
}

/* --------------------------------------------------------------------------
   Pages - 技术方法页
   -------------------------------------------------------------------------- */

.method-article {
  max-width: 100%;
}

.method-section {
  margin-bottom: 48px;
}

.method-section h2 {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

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

.method-section p:last-of-type {
  margin-bottom: 20px;
}

.method-figure {
  margin-top: 20px;
}

.method-figure img {
  max-height: 420px;
}

/* 维度列表 */
.dimension-list,
.alert-level-list {
  margin: 16px 0 24px;
  padding: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.dimension-list li,
.alert-level-list li {
  padding: 8px 0;
  font-size: 15px;
  border-bottom: 1px solid var(--color-border);
}

.dimension-list li:last-child,
.alert-level-list li:last-child {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   Pages - 质量体系页
   -------------------------------------------------------------------------- */

.quality-module {
  margin-bottom: 48px;
}

.quality-module h2 {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.quality-module > p {
  font-size: 15px;
  margin-bottom: 20px;
}

/* 标准列表 */
.standard-list {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.standard-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
}

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

.standard-list strong {
  color: var(--color-primary);
  margin-right: 8px;
}

/* 审核步骤 */
.review-steps {
  counter-reset: review-counter;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

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

.review-steps li::before {
  content: counter(review-counter);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 12px;
}

.review-steps strong {
  display: block;
  font-size: 15px;
  margin-bottom: 6px;
}

/* 改进列表 */
.improvement-list {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
}

.improvement-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
}

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

/* 记录列表 */
.record-list {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.record-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
}

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

/* 侧栏说明 */
.sidebar-note {
  margin-top: 24px;
  padding: 20px;
  background-color: var(--color-light-blue);
  border-radius: var(--radius-md);
}

.sidebar-note p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Pages - 团队分工页
   -------------------------------------------------------------------------- */

.team-section {
  margin-bottom: 48px;
}

.team-section h2 {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.team-section p {
  font-size: 15px;
  margin-bottom: 16px;
}

.team-figure {
  margin-top: 20px;
}

.team-figure img {
  max-height: 420px;
}

/* 职责列表 */
.duty-list {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 16px 0;
}

.duty-list li {
  padding: 8px 0;
  font-size: 15px;
  border-bottom: 1px solid var(--color-border);
}

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

/* --------------------------------------------------------------------------
   Pages - 常见问题页
   -------------------------------------------------------------------------- */

.faq-visual {
  margin-bottom: 32px;
}

.faq-visual img {
  max-height: 300px;
}

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

.faq-section h2 {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.sidebar-cta {
  background-color: var(--color-light-blue);
  padding: 20px;
  border-radius: var(--radius-md);
  margin-top: 24px;
}

.sidebar-cta p {
  font-size: 14px;
  margin-bottom: 12px;
}

/* --------------------------------------------------------------------------
   Pages - 商务合作页
   -------------------------------------------------------------------------- */

.page-cooperation .page-heading {
  margin-bottom: 32px;
}

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

/* 流程概览 */
.process-overview {
  margin-bottom: 48px;
}

.process-overview h2 {
  margin-bottom: 24px;
}

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

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

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

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

.process-step h3 {
  font-size: 17px;
  margin-bottom: 12px;
}

.process-step p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 8px;
}

/* 流程详述 */
.process-detail {
  margin-bottom: 48px;
}

.process-detail h2 {
  margin-bottom: 24px;
}

.detail-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 16px;
}

.detail-block h3 {
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.detail-block p {
  font-size: 15px;
  margin-bottom: 12px;
}

.detail-block ul {
  padding-left: 20px;
}

.detail-block ul li {
  list-style: disc;
  font-size: 14px;
  padding: 4px 0;
}

/* 合作方式 */
.cooperation-mode {
  margin-bottom: 48px;
}

.cooperation-mode h2 {
  margin-bottom: 16px;
}

.cooperation-mode p {
  font-size: 15px;
  margin-bottom: 20px;
}

.content-figure {
  margin-top: 16px;
}

.content-figure img {
  max-height: 360px;
}

/* 准备建议 */
.preparation-tips {
  margin-bottom: 48px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.preparation-tips h2 {
  margin-bottom: 16px;
}

.preparation-tips > p {
  font-size: 15px;
  margin-bottom: 16px;
}

.preparation-tips ul {
  padding-left: 20px;
}

.preparation-tips ul li {
  list-style: disc;
  font-size: 15px;
  padding: 6px 0;
}

/* 下一步行动 */
.next-action {
  background-color: var(--color-light-blue);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 48px;
}

.next-action h2 {
  margin-bottom: 12px;
}

.next-action p {
  font-size: 15px;
  margin-bottom: 20px;
}

.action-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.action-links li a {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
}

.action-links li a:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Pages - 404 页面
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 20px;
}

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

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

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

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

/* --------------------------------------------------------------------------
   Responsive - 响应式断点
   -------------------------------------------------------------------------- */

/* 平板 - 1024px */
@media (max-width: 1024px) {
  .layout-shell,
  .page-layout,
  .homepage-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
  }

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

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

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

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

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

  .menu-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  }

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

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

  .site-nav ul li {
    width: 100%;
  }

  .site-nav ul li a {
    padding: 14px 12px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .site-nav ul li:last-child a {
    border-bottom: none;
  }

  .layout-shell,
  .page-layout,
  .homepage-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 24px 16px 40px;
  }

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

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

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

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

  .faq-preview-grid {
    grid-template-columns: 1fr;
  }

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

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

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

  .comparison-table {
    font-size: 13px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 10px 8px;
  }

  .announcement-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .announcement-list a {
    min-width: 0;
  }

  .related-links {
    gap: 6px;
  }

  .related-links-item {
    padding: 5px 12px;
    font-size: 13px;
  }

  .sidebar,
  .sidebar-area,
  .page-sidebar {
    margin-top: 8px;
  }
}

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

  .hero-content h1 {
    font-size: 24px;
  }

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

  .btn-primary,
  .btn-secondary {
    padding: 10px 20px;
    font-size: 15px;
  }

  .process-step {
    padding: 20px;
  }

  .next-action {
    padding: 24px 20px;
  }

  .action-links {
    flex-direction: column;
  }

  .action-links li a {
    width: 100%;
    text-align: center;
  }
}