/* ============================================================
   qinzipai.com - 海角社区吃瓜 整站样式
   低饱和多彩风：灰蓝为主，灰绿/灰橙/灰紫作区分
   ============================================================ */

/* ============================================================
   Base
   ============================================================ */
:root {
  --color-primary: #5B7A9D;
  --color-primary-dark: #4A6B8C;
  --color-primary-light: #EAF0F5;
  --color-bg: #F4F6F8;
  --color-text: #2D3748;
  --color-text-light: #5A6B7E;
  --color-border: #CBD5E0;
  --color-light: #E2E8F0;
  --color-green: #8B9E6A;
  --color-orange: #C47F5D;
  --color-purple: #7D6E9A;
  --color-white: #FFFFFF;

  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-num: 'Inter', sans-serif;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(45, 55, 72, 0.08);
  --shadow-md: 0 4px 12px rgba(45, 55, 72, 0.1);
  --shadow-hover: 0 8px 20px rgba(45, 55, 72, 0.14);

  --content-max: 1200px;
  --main-max: 1200px;
  --sidebar-width: 260px;
  --header-height: 64px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

*,
*::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: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0.5rem;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================================
   Layout 骨架
   ============================================================ */

/* 站点主体：侧栏 + 内容区，桌面为左右布局 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 侧栏在桌面端固定于左侧的布局容器 */
.layout-shell.sidebar-left {
  display: flex;
  flex: 1 0 auto;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
  gap: 32px;
  align-items: flex-start;
}

/* 侧边导航 */
.side-nav,
.side-nav-wrap {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 0;
  margin: 24px 0;
  position: sticky;
  top: calc(var(--header-height) + 24px);
  box-shadow: var(--shadow-sm);
}

.side-nav-wrap .side-nav {
  width: 100%;
  border: none;
  box-shadow: none;
  margin: 0;
  padding: 0;
  position: static;
}

/* 侧栏分组 */
.nav-group,
.side-nav-group {
  margin-bottom: 8px;
}

.nav-group-title,
.side-nav-group-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-light);
  padding: 8px 20px 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-group-list,
.side-nav-list {
  padding: 0 8px;
}

.nav-group-list li,
.side-nav-list li {
  margin-bottom: 2px;
}

.nav-group-list a,
.side-nav-list a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.5;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-group-list a:hover,
.side-nav-list a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.nav-group-list a.active,
.side-nav-list a.active {
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
}

/* 主内容区 */
.site-main {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  padding: 24px 0 48px;
}

/* 内页主内容 */
.site-main.inner-main {
  max-width: var(--main-max);
}

/* 首页主内容 */
.site-main.home-main {
  max-width: var(--main-max);
}

/* 404 主内容 */
.site-main.error-main {
  max-width: var(--main-max);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

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

.header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-text-light);
}

/* 移动端汉堡按钮 */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.menu-icon {
  display: block;
  width: 20px;
  height: 16px;
  position: relative;
}

.menu-icon::before,
.menu-icon::after,
.menu-icon span {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), top var(--transition-base);
}

.menu-icon::before {
  top: 0;
}

.menu-icon span {
  top: 7px;
}

.menu-icon::after {
  top: 14px;
}

/* 主导航（桌面端顶部横向） */
.main-nav.site-nav {
  display: flex;
  align-items: center;
}

.main-nav-list {
  display: flex;
  gap: 4px;
}

.main-nav-list li {
  position: relative;
}

.main-nav-list .nav-link {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.main-nav-list .nav-link:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.main-nav-list .nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-primary-light);
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--color-border);
  font-size: 12px;
}

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

/* ============================================================
   页头标题区（内页）
   ============================================================ */
.page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

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

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.6;
}

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

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

.btn-secondary:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

/* ============================================================
   首页 Hero
   ============================================================ */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0 40px;
}

.hero-copy {
  max-width: 540px;
}

.hero-copy h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-lead {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

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

.hero-figure {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

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

/* 首页内容图 */
.content-media {
  margin: 24px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

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

.content-media figcaption {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-text-light);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* ============================================================
   首页 通用区块
   ============================================================ */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

/* 信息架构卡片 */
.info-arch-section {
  padding: 32px 0;
}

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

.arch-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.arch-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--color-white);
}

.info-arch-grid .arch-card:nth-child(1) .arch-icon {
  background: var(--color-primary);
}

.info-arch-grid .arch-card:nth-child(2) .arch-icon {
  background: var(--color-green);
}

.info-arch-grid .arch-card:nth-child(3) .arch-icon {
  background: var(--color-orange);
}

.arch-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.arch-card p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.6;
  flex: 1;
}

.arch-card::after {
  content: '查看详情 →';
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

/* 功能精选 */
.feature-highlights-section {
  padding: 32px 0;
}

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

.feature-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 20px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base);
}

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

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-white);
}

.feature-grid .feature-item:nth-child(1) .feature-icon,
.feature-grid .feature-item:nth-child(4) .feature-icon {
  background: var(--color-primary);
}

.feature-grid .feature-item:nth-child(2) .feature-icon,
.feature-grid .feature-item:nth-child(5) .feature-icon {
  background: var(--color-green);
}

.feature-grid .feature-item:nth-child(3) .feature-icon,
.feature-grid .feature-item:nth-child(6) .feature-icon {
  background: var(--color-purple);
}

.feature-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.feature-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.55;
}

/* 为什么选择我们 */
.why-us-section {
  padding: 32px 0;
}

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

.why-item {
  padding: 28px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-top: 3px solid var(--color-primary);
  transition: box-shadow var(--transition-base);
}

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

.why-grid .why-item:nth-child(1) {
  border-top-color: var(--color-primary);
}

.why-grid .why-item:nth-child(2) {
  border-top-color: var(--color-green);
}

.why-grid .why-item:nth-child(3) {
  border-top-color: var(--color-orange);
}

.why-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-white);
  margin-bottom: 16px;
}

.why-grid .why-item:nth-child(1) .why-icon {
  background: var(--color-primary);
}

.why-grid .why-item:nth-child(2) .why-icon {
  background: var(--color-green);
}

.why-grid .why-item:nth-child(3) .why-icon {
  background: var(--color-orange);
}

.why-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.why-item p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 更新摘要 */
.update-summary-section {
  padding: 32px 0;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.update-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base);
}

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

.update-date {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--color-text-light);
  background: var(--color-light);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  height: fit-content;
  text-align: center;
}

.update-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.update-item p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 10px;
}

.update-item a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

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

/* CTA 区 */
.cta-section {
  padding: 48px 32px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  text-align: center;
  margin: 32px 0;
}

.cta-section h2 {
  font-size: 24px;
  color: var(--color-white);
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
  max-width: 560px;
  margin: 0 auto 24px;
  line-height: 1.6;
}

.cta-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

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

.cta-section .btn-primary:hover {
  background: var(--color-light);
  border-color: var(--color-light);
}

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

.cta-section .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-white);
  color: var(--color-white);
}

/* 相关链接 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0;
  margin-top: 24px;
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-light);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-primary);
  padding: 4px 10px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

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

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  flex-shrink: 0;
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 280px;
}

.footer-links h2,
.footer-updates h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a,
.footer-updates a {
  font-size: 14px;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-updates a:hover {
  color: var(--color-primary);
}

.footer-updates a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.footer-updates a::before {
  content: '→';
  font-size: 14px;
}

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

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-light);
  max-width: var(--content-max);
  margin: 0 auto;
}

/* ============================================================
   内页共用表格
   ============================================================ */
.table-overview,
.table-compare,
.review-table {
  width: 100%;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-size: 15px;
}

.table-overview th,
.table-compare th,
.review-table th {
  background: var(--color-primary-light);
  color: var(--color-text);
  font-weight: 600;
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

.table-overview td,
.table-compare td,
.review-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: top;
  line-height: 1.6;
}

.table-overview tr:last-child td,
.table-compare tr:last-child td,
.review-table tr:last-child td {
  border-bottom: none;
}

.table-overview tbody tr:hover,
.table-compare tbody tr:hover,
.review-table tbody tr:hover {
  background: var(--color-primary-light);
}

.table-note {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: 12px;
  line-height: 1.6;
}

/* ============================================================
   核心功能页
   ============================================================ */
.overview {
  margin-bottom: 48px;
}

.overview > h2,
.function-detail > h2,
.comparison-table > h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.function-detail {
  margin-bottom: 48px;
}

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

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

.function-item:nth-child(even) .function-media {
  order: 2;
}

.function-item:nth-child(even) .function-text {
  order: 1;
}

.function-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

.function-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.function-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.function-text h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.function-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
}

/* ============================================================
   应用场景页
   ============================================================ */
.scene-anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.scene-anchor-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 18px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.scene-anchor-nav a:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.scene-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-bottom: 40px;
}

.scene-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  padding: 32px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  align-items: center;
  transition: box-shadow var(--transition-base);
}

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

.scene-card-text h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scene-role {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding: 4px 12px;
  background: var(--color-primary-light);
  border-radius: var(--radius-sm);
  display: inline-block;
}

.scene-card-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
}

.scene-summary {
  font-weight: 500;
  color: var(--color-text) !important;
  margin-top: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.scene-card-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.scene-card-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.scene-card-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.selection-tip {
  padding: 28px 32px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.selection-tip h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

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

/* ============================================================
   使用指南页
   ============================================================ */
.guide-timeline,
.guide-config-steps,
.guide-member-layers,
.guide-review-rules,
.guide-activity-sop,
.guide-tips {
  margin-bottom: 48px;
}

.guide-timeline > h2,
.guide-config-steps > h2,
.guide-member-layers > h2,
.guide-review-rules > h2,
.guide-activity-sop > h2,
.guide-tips > h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.guide-timeline > p,
.guide-config-steps > p,
.guide-member-layers > p,
.guide-review-rules > p,
.guide-activity-sop > p,
.guide-tips > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

/* 时间线 */
.timeline-list {
  position: relative;
  padding-left: 24px;
}

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

.timeline-item {
  position: relative;
  padding: 20px 0 20px 24px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -21px;
  top: 28px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-marker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.timeline-phase {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}

.timeline-duration {
  font-size: 13px;
  font-family: var(--font-num);
  color: var(--color-text-light);
}

.timeline-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 6px;
}

/* 配置步骤 */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 24px;
}

.step-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base);
}

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

.step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-num);
}

.step-body {
  flex: 1;
  min-width: 0;
}

.step-body h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

.guide-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  margin-top: 24px;
}

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

.guide-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* 成员分层 */
.layer-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.layer-card {
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-top: 3px solid var(--color-primary);
}

.layer-card:nth-child(1) {
  border-top-color: var(--color-primary);
}

.layer-card:nth-child(2) {
  border-top-color: var(--color-green);
}

.layer-card:nth-child(3) {
  border-top-color: var(--color-orange);
}

.layer-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.layer-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.65;
  margin-bottom: 8px;
}

.layer-tip {
  font-size: 14px;
  color: var(--color-text-light);
  background: var(--color-primary-light);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  line-height: 1.6;
}

/* 审核规则表 */
.review-table-wrap {
  overflow-x: auto;
  margin-bottom: 12px;
}

/* 活动 SOP */
.sop-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sop-step {
  display: flex;
  gap: 20px;
  padding: 20px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base);
}

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

.sop-step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-green);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-num);
}

.sop-step-body {
  flex: 1;
  min-width: 0;
}

.sop-step-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.sop-step-body p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.65;
}

/* 操作技巧 */
.tips-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.tips-list li {
  position: relative;
  padding: 16px 20px 16px 44px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.65;
}

.tips-list li::before {
  content: '✓';
  position: absolute;
  left: 16px;
  top: 14px;
  color: var(--color-green);
  font-weight: 700;
  font-size: 16px;
}

.guide-more {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.guide-more a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.guide-more a:hover {
  border-bottom-color: var(--color-primary);
}

/* ============================================================
   常见问题页
   ============================================================ */
.faq-group {
  margin-bottom: 40px;
}

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

.faq-category > h2 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-primary-dark);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color var(--transition-fast);
}

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

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

.faq-item[open] summary {
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
}

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

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

.faq-answer p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 8px;
}

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

.support-note {
  padding: 28px 32px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.support-note h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

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

.support-note a {
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.support-note a:hover {
  border-bottom-color: var(--color-primary);
}

.faq-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
}

.faq-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.faq-image figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* ============================================================
   更新动态页
   ============================================================ */
.version-timeline,
.milestone-events,
.update-summary,
.next-cta {
  margin-bottom: 48px;
}

.version-timeline > h2,
.milestone-events > h2,
.update-summary > h2,
.next-cta > h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.version-timeline > .section-intro,
.milestone-events > .section-intro,
.update-summary > .section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

.version-timeline .timeline-item {
  padding: 24px 0 24px 24px;
  border-bottom: 1px solid var(--color-border);
}

.version-timeline .timeline-item:last-child {
  border-bottom: none;
}

.version-timeline .timeline-marker {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.timeline-version {
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-num);
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}

.timeline-date {
  font-size: 14px;
  font-family: var(--font-num);
  color: var(--color-text-light);
}

.version-timeline .timeline-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.version-timeline .timeline-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 6px;
  max-width: 720px;
}

/* 里程碑 */
.milestone-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.milestone-card {
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-top: 3px solid var(--color-primary);
  transition: box-shadow var(--transition-base);
}

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

.milestone-card:nth-child(1) {
  border-top-color: var(--color-primary);
}

.milestone-card:nth-child(2) {
  border-top-color: var(--color-green);
}

.milestone-card:nth-child(3) {
  border-top-color: var(--color-orange);
}

.milestone-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.milestone-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.65;
}

.timeline-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  margin-top: 24px;
}

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

.timeline-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* 更新摘要卡片 */
.update-summary .summary-card {
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  transition: box-shadow var(--transition-base);
}

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

.summary-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.summary-card time {
  display: inline-block;
  font-size: 13px;
  font-family: var(--font-num);
  color: var(--color-text-light);
  background: var(--color-light);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}

.summary-card p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.65;
  margin-bottom: 10px;
}

.summary-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

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

/* 下一区块 CTA */
.next-cta {
  padding: 32px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.next-cta p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

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

/* ============================================================
   关于我们页
   ============================================================ */
.about-story,
.about-principles,
.about-boundaries,
.about-future {
  margin-bottom: 48px;
}

.about-story {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
}

.story-text h2,
.about-principles > h2,
.about-boundaries > h2,
.about-future > h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.story-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.story-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

.story-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.story-image figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.about-principles > .section-intro,
.about-boundaries > .section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

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

.principle-card {
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-primary);
  transition: box-shadow var(--transition-base);
}

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

.principle-card:nth-child(1) {
  border-left-color: var(--color-primary);
}

.principle-card:nth-child(2) {
  border-left-color: var(--color-green);
}

.principle-card:nth-child(3) {
  border-left-color: var(--color-orange);
}

.principle-card:nth-child(4) {
  border-left-color: var(--color-purple);
}

.principle-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.principle-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.65;
}

.boundaries-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.boundaries-list li {
  padding: 20px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base);
}

.boundaries-list li:hover {
  box-shadow: var(--shadow-md);
}

.boundaries-list h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-primary-dark);
}

.boundaries-list p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.65;
}

.about-future p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
  max-width: 720px;
}

/* ============================================================
   404 页面
   ============================================================ */
.error-section {
  text-align: center;
  max-width: 560px;
  padding: 48px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

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

.error-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.error-tip {
  font-size: 14px;
  color: var(--color-text-light);
}

/* ============================================================
   响应式
   ============================================================ */

/* 平板 */
@media (max-width: 1024px) {
  .layout-shell.sidebar-left {
    padding: 0 20px;
    gap: 24px;
  }

  .side-nav,
  .side-nav-wrap {
    width: 220px;
  }

  .hero-section {
    gap: 32px;
  }

  .info-arch-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .why-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .scene-card {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .function-item {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .function-item:nth-child(even) .function-media {
    order: 0;
  }

  .function-item:nth-child(even) .function-text {
    order: 0;
  }

  .about-story {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .milestone-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

/* 手机 */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 17px;
  }

  /* 页头 */
  .header-inner {
    padding: 0 16px;
    height: 56px;
  }

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

  .brand-tagline {
    display: none;
  }

  /* 移动端菜单按钮显示 */
  .menu-toggle {
    display: flex;
  }

  /* 主导航移动端：固定抽屉 */
  .main-nav.site-nav {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    display: none;
    z-index: 99;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
  }

  .main-nav.site-nav.is-open {
    display: block;
  }

  .main-nav-list {
    flex-direction: column;
    padding: 8px 16px;
  }

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

  .main-nav-list .nav-link {
    display: block;
    padding: 14px 12px;
    font-size: 16px;
    border-radius: var(--radius-md);
  }

  /* 布局容器改为纵向 */
  .layout-shell.sidebar-left {
    flex-direction: column;
    padding: 0 16px;
    gap: 0;
  }

  /* 侧栏移动端：默认隐藏，展开时显示 */
  .side-nav,
  .side-nav-wrap {
    width: 100%;
    position: static;
    margin: 16px 0 0;
    display: none;
  }

  .side-nav.is-open,
  .side-nav-wrap.is-open {
    display: block;
  }

  .side-nav-wrap .side-nav {
    display: block;
  }

  /* 主内容在侧栏之前 */
  .site-main {
    padding: 16px 0 40px;
    order: -1;
  }

  /* Hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0 24px;
  }

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

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

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

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

  /* 首页卡片网格 */
  .info-arch-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

  /* 更新条目 */
  .update-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 20px;
  }

  .update-date {
    width: fit-content;
  }

  /* CTA */
  .cta-section {
    padding: 32px 20px;
  }

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

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

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

  .footer-brand {
    grid-column: auto;
  }

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

  /* 内页标题区 */
  .page-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
  }

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

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

  /* 面包屑 */
  .breadcrumb {
    font-size: 13px;
    margin-bottom: 16px;
  }

  /* 表格移动端横向滚动 */
  .table-overview,
  .table-compare,
  .review-table {
    font-size: 14px;
    min-width: 520px;
  }

  .table-overview th,
  .table-compare th,
  .review-table th {
    padding: 10px 12px;
    font-size: 13px;
  }

  .table-overview td,
  .table-compare td,
  .review-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .review-table-wrap {
    overflow-x: auto;
  }

  /* 功能页 */
  .function-item {
    padding: 24px 0;
  }

  .function-text h3 {
    font-size: 18px;
  }

  /* 场景页 */
  .scene-anchor-nav {
    gap: 8px;
  }

  .scene-anchor-nav a {
    padding: 8px 14px;
    font-size: 13px;
  }

  .scene-card {
    padding: 20px;
  }

  .selection-tip {
    padding: 20px;
  }

  /* 指南页 */
  .step-item {
    flex-direction: column;
    gap: 12px;
    padding: 20px;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 15px;
  }

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

  .sop-step {
    flex-direction: column;
    gap: 12px;
    padding: 20px;
  }

  .sop-step-num {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  /* FAQ */
  .faq-item summary {
    font-size: 14px;
    padding: 14px 44px 14px 16px;
  }

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

  .support-note {
    padding: 20px;
  }

  /* 更新页 */
  .milestone-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .milestone-card {
    padding: 20px;
  }

  .version-timeline .timeline-item {
    padding: 20px 0 20px 20px;
  }

  .timeline-marker {
    gap: 8px;
  }

  .timeline-version {
    font-size: 14px;
    padding: 3px 10px;
  }

  .timeline-date {
    font-size: 13px;
  }

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

  .principle-card {
    padding: 20px;
  }

  .boundaries-list li {
    padding: 16px 20px;
  }

  /* 404 */
  .error-code {
    font-size: 56px;
  }

  .error-title {
    font-size: 20px;
  }

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

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

  /* 相关链接 */
  .related-links {
    gap: 6px;
  }

  .related-links-item {
    font-size: 13px;
    padding: 4px 8px;
  }
}

/* 超小屏 */
@media (max-width: 480px) {
  .header-inner {
    padding: 0 12px;
  }

  .layout-shell.sidebar-left {
    padding: 0 12px;
  }

  .hero-copy h1 {
    font-size: 22px;
  }

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

  .section-title {
    font-size: 20px;
  }

  .info-arch-card,
  .feature-item,
  .why-item {
    padding: 20px 16px;
  }

  .scene-card {
    padding: 16px;
  }

  .timeline-list {
    padding-left: 16px;
  }

  .timeline-item {
    padding-left: 16px;
  }

  .timeline-item::before {
    left: -17px;
  }

  .footer-inner {
    padding: 24px 12px 16px;
  }
}

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

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