/* ============================================================
   吃瓜爆料 · 整站样式表
   设计方向：自然科普风 / 纸白底 / 苔绿与砂陶辅助
   版本：1.0
   ============================================================ */

/* ------------------------------------------------------------
   Base · 基础重置与全局变量
   ------------------------------------------------------------ */
:root {
  --color-paper: #FBF8F3;
  --color-ink: #243D33;
  --color-moss: #517A5A;
  --color-clay: #B97948;
  --color-mist: #6E95A3;
  --color-sand: #EFE9E0;
  --color-white: #FFFFFF;
  --color-text-soft: #5A6B63;

  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;

  --container-width: 1180px;
  --container-padding: 24px;

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

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 72px;

  --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%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-ink);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-ink);
}

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------------
   Layout · 全局布局骨架
   ------------------------------------------------------------ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-paper);
}

.site-main {
  flex: 1 0 auto;
}

/* 顶部页头 */
.site-header {
  background-color: var(--color-ink);
  border-bottom: 3px solid var(--color-clay);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: var(--space-md);
}

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

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-paper);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.brand-logo:hover .brand-name {
  color: var(--color-paper);
  opacity: 0.9;
}

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

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

.nav-list li {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 0.95rem;
  color: rgba(251, 248, 243, 0.85);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-paper);
  background-color: rgba(251, 248, 243, 0.12);
}

.nav-list a.is-current {
  color: var(--color-paper);
  background-color: rgba(81, 122, 90, 0.6);
  font-weight: 500;
}

/* 汉堡按钮，桌面隐藏 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(251, 248, 243, 0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  gap: 5px;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-paper);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* 页脚 */
.site-footer {
  background-color: var(--color-ink);
  color: rgba(251, 248, 243, 0.8);
  margin-top: var(--space-xl);
}

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--container-padding) var(--space-md);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-lg);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-brand-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-paper);
  margin-bottom: 0;
}

.footer-tagline {
  font-size: 0.95rem;
  color: rgba(251, 248, 243, 0.65);
  line-height: 1.6;
  margin-bottom: 0;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-paper);
  margin-bottom: var(--space-sm);
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(251, 248, 243, 0.7);
}

.footer-links a:hover {
  color: var(--color-paper);
}

.footer-bottom {
  border-top: 1px solid rgba(251, 248, 243, 0.15);
  padding: var(--space-sm) var(--container-padding);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(251, 248, 243, 0.5);
  margin-bottom: 0;
}

/* 内页通用骨架 */
.inner-main {
  background-color: var(--color-paper);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-sm) var(--container-padding) 0;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs);
  color: var(--color-text-soft);
}

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

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

.breadcrumb-sep {
  color: rgba(90, 107, 99, 0.5);
}

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

/* 页面标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-md) var(--container-padding) var(--space-lg);
}

.page-title {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-xs);
}

.page-description {
  font-size: 1.05rem;
  color: var(--color-text-soft);
  max-width: 720px;
  margin-bottom: 0;
}

/* 通用 section 容器 */
.section-block {
  padding: var(--space-lg) 0;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.4;
}

/* 通用网格容器 */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ------------------------------------------------------------
   Components · 通用组件
   ------------------------------------------------------------ */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
  min-height: 44px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-moss);
  color: var(--color-paper);
  border-color: var(--color-moss);
}

.btn-primary:hover {
  background-color: #436849;
  border-color: #436849;
  color: var(--color-paper);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-paper);
  border-color: rgba(251, 248, 243, 0.6);
}

.btn-secondary:hover {
  background-color: rgba(251, 248, 243, 0.1);
  border-color: var(--color-paper);
  color: var(--color-paper);
}

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

.btn-outline:hover {
  background-color: var(--color-moss);
  color: var(--color-paper);
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: var(--color-moss);
  color: var(--color-paper);
  border-radius: var(--radius-md);
  font-weight: 500;
  min-height: 44px;
}

.btn-home:hover {
  background-color: #436849;
  color: var(--color-paper);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 0;
  color: var(--color-moss);
  font-weight: 500;
  border-bottom: 2px solid transparent;
}

.btn-link:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-moss);
}

/* 文本链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 500;
  color: var(--color-moss);
}

.text-link:hover {
  color: var(--color-ink);
}

/* 区块标签 */
.section-tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-clay);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-xs);
}

/* ------------------------------------------------------------
   Pages · 首页特有模块
   ------------------------------------------------------------ */
/* 公告栏首屏 */
.hero-announcement {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.hero-announcement .hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--container-padding) var(--space-lg);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.9rem;
  font-weight: 500;
  color: #A8C3AE;
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-paper);
  margin-bottom: var(--space-sm);
}

.hero-lead {
  font-size: 1.1rem;
  line-height: 1.7;
  color: rgba(251, 248, 243, 0.85);
  margin-bottom: var(--space-md);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.hero-figure {
  margin: 0;
}

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

/* 处理规则提示条 */
.rule-ticker {
  background-color: var(--color-sand);
  border-bottom: 1px solid rgba(90, 107, 99, 0.15);
}

.rule-ticker {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-sm) var(--container-padding);
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.rule-label {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background-color: var(--color-clay);
  color: var(--color-paper);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.rule-ticker p {
  font-size: 0.95rem;
  color: var(--color-ink);
  margin-bottom: 0;
  line-height: 1.6;
}

/* 首页通用区块容器 */
.home-main .section-block {
  padding: var(--space-xl) 0;
}

.home-main .section-block:nth-child(even) {
  background-color: var(--color-sand);
}

.home-main .section-block .section-heading,
.home-main .section-block .topic-intro,
.home-main .section-block .guide-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* 本期主题与关联内容 */
.topic-curation .topic-intro {
  margin-bottom: var(--space-lg);
}

.topic-curation .section-title {
  margin-bottom: var(--space-xs);
}

.section-desc {
  color: var(--color-text-soft);
  max-width: 640px;
}

.topic-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.topic-link-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-md);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.topic-link-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(36, 61, 51, 0.08);
}

.topic-link-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-ink);
}

.topic-link-desc {
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

/* 能力清单四卡预览 */
.capability-preview .section-heading {
  margin-bottom: var(--space-lg);
}

.capability-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.capability-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(36, 61, 51, 0.08);
}

.capability-index {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-clay);
  margin-bottom: var(--space-xs);
}

.capability-label {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-xs);
}

.capability-desc {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  line-height: 1.6;
}

/* 编辑推荐图文入口区 */
.reading-picks .section-heading {
  margin-bottom: var(--space-lg);
}

.reading-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.reading-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.reading-media {
  margin: 0;
  overflow: hidden;
}

.reading-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.reading-content {
  padding: var(--space-md);
}

.reading-content h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-xs);
}

.reading-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

/* 词条与问答快速标签条 */
.quick-links .section-heading {
  margin-bottom: var(--space-md);
}

.tag-scroll {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  overflow-x: auto;
  scrollbar-width: none;
}

.tag-scroll::-webkit-scrollbar {
  display: none;
}

.tag-item {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid rgba(90, 107, 99, 0.2);
  border-radius: 999px;
  font-size: 0.95rem;
  color: var(--color-ink);
  min-height: 44px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.tag-item:hover {
  background-color: var(--color-moss);
  border-color: var(--color-moss);
  color: var(--color-paper);
}

.tag-item.tag-cta {
  background-color: var(--color-clay);
  border-color: var(--color-clay);
  color: var(--color-paper);
  font-weight: 500;
}

.tag-item.tag-cta:hover {
  background-color: var(--color-moss);
  border-color: var(--color-moss);
}

/* 站点指引入口区 */
.guide-entry {
  background-color: var(--color-ink);
}

.guide-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--container-padding);
  text-align: center;
}

.guide-content .section-title {
  color: var(--color-paper);
  margin-bottom: var(--space-xs);
}

.guide-desc {
  color: rgba(251, 248, 243, 0.8);
  max-width: 600px;
  margin: 0 auto var(--space-md);
}

.guide-content .btn-outline {
  border-color: var(--color-paper);
  color: var(--color-paper);
}

.guide-content .btn-outline:hover {
  background-color: var(--color-paper);
  color: var(--color-ink);
}

/* ------------------------------------------------------------
   Pages · 能力清单页
   ------------------------------------------------------------ */
.capability-intro {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--space-lg);
}

.capability-intro .section-title {
  margin-bottom: var(--space-md);
}

.capability-intro-shell {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-lg);
  align-items: center;
}

.capability-figure {
  margin: 0;
}

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

.capability-intro-text p {
  color: var(--color-text-soft);
}

.capability-selector {
  background-color: var(--color-sand);
  padding: var(--space-xl) 0;
}

.capability-selector .section-title {
  max-width: var(--container-width);
  margin: 0 auto var(--space-lg);
  padding: 0 var(--container-padding);
}

.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.filter-sidebar {
  position: sticky;
  top: 90px;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.filter-hint {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.filter-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.filter-item {
  display: block;
  padding: 10px 14px;
  font-size: 0.95rem;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.filter-item:hover {
  background-color: var(--color-sand);
  border-color: rgba(90, 107, 99, 0.2);
}

.filter-note {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin-top: var(--space-sm);
}

.service-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.service-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
  scroll-margin-top: 90px;
}

.service-card:target {
  border-color: var(--color-moss);
  box-shadow: 0 0 0 3px rgba(81, 122, 90, 0.15);
}

.service-card-head {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.service-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background-color: var(--color-sand);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-clay);
}

.service-name {
  font-size: 1.3rem;
  margin-bottom: 0;
}

.service-apply {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.service-detail h4 {
  font-size: 0.95rem;
  color: var(--color-moss);
  margin-bottom: 4px;
}

.service-detail p {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.service-link {
  display: inline-flex;
  align-items: center;
  font-weight: 500;
  color: var(--color-moss);
}

.service-link:hover {
  color: var(--color-ink);
}

/* 服务比较表 */
.service-comparison {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--container-padding);
}

.service-comparison .section-title {
  margin-bottom: var(--space-md);
}

.comparison-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
  min-width: 640px;
}

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

.comparison-table thead th {
  background-color: var(--color-ink);
  color: var(--color-paper);
  font-weight: 600;
  font-size: 0.95rem;
}

.comparison-table tbody th {
  background-color: var(--color-sand);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
}

.comparison-table tbody td {
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

.comparison-table tbody tr:last-child th,
.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

/* 关联词条与合作入口 */
.capability-related {
  background-color: var(--color-sand);
  padding: var(--space-xl) 0;
}

.capability-related .section-title {
  max-width: var(--container-width);
  margin: 0 auto var(--space-lg);
  padding: 0 var(--container-padding);
}

.related-links-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.related-block {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.related-heading {
  font-size: 1.05rem;
  margin-bottom: var(--space-xs);
}

.related-block p {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.related-block a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-moss);
}

/* ------------------------------------------------------------
   Pages · 项目交付页
   ------------------------------------------------------------ */
.delivery-summary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--space-lg);
}

.delivery-summary .section-title {
  margin-bottom: var(--space-xs);
}

.section-intro {
  color: var(--color-text-soft);
  margin-bottom: var(--space-md);
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
}

.fact-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
  border-top: 3px solid var(--color-clay);
}

.fact-item h3 {
  font-size: 0.95rem;
  color: var(--color-clay);
  margin-bottom: 4px;
}

.fact-item p {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-bottom: 0;
}

.delivery-figure {
  max-width: var(--container-width);
  margin: 0 auto var(--space-lg);
  padding: 0 var(--container-padding);
}

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

.delivery-figure figcaption {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-top: var(--space-xs);
  text-align: center;
}

.delivery-process {
  background-color: var(--color-sand);
}

.delivery-process .section-title,
.delivery-process .section-intro {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.process-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-md) var(--container-padding) 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.process-step {
  position: relative;
  padding-top: var(--space-md);
}

.process-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-color: rgba(90, 107, 99, 0.2);
  border-radius: 2px;
}

.process-step::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40%;
  height: 4px;
  background-color: var(--color-moss);
  border-radius: 2px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-moss);
  color: var(--color-paper);
  border-radius: 50%;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.process-step h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-bottom: 0;
}

/* 双方配合责任 */
.responsibility-section .section-title {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  margin-bottom: var(--space-md);
}

.responsibility-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.responsibility-col {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.responsibility-col h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-moss);
}

.check-list li {
  position: relative;
  padding-left: 28px;
  font-size: 0.95rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-xs);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-moss);
  border-radius: 50%;
}

/* 下一步入口 */
.next-steps {
  background-color: var(--color-sand);
}

.next-steps .section-title,
.next-steps .section-intro {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.next-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.next-links li {
  margin: 0;
}

.next-links a {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid rgba(90, 107, 99, 0.2);
  border-radius: 999px;
  color: var(--color-ink);
  font-size: 0.95rem;
  min-height: 44px;
}

.next-links a:hover {
  background-color: var(--color-moss);
  border-color: var(--color-moss);
  color: var(--color-paper);
}

/* ------------------------------------------------------------
   Pages · 阅读参考页
   ------------------------------------------------------------ */
.reading-intro {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--space-lg);
}

.reading-intro h2 {
  font-size: 1.4rem;
  margin-bottom: var(--space-sm);
}

.reading-intro-body p {
  color: var(--color-text-soft);
  max-width: 760px;
}

.reading-intro-links {
  margin-top: var(--space-sm);
}

.reading-intro-links p {
  margin-bottom: 0;
}

.reading-intro-links a {
  color: var(--color-moss);
  font-weight: 500;
  margin-right: var(--space-md);
}

.reading-articles {
  background-color: var(--color-sand);
  padding: var(--space-xl) 0;
}

.reading-articles > h2 {
  max-width: var(--container-width);
  margin: 0 auto var(--space-lg);
  padding: 0 var(--container-padding);
  font-size: 1.6rem;
}

.reading-articles .reading-card {
  max-width: var(--container-width);
  margin: 0 auto var(--space-lg);
  display: grid;
  grid-template-columns: 300px 1fr;
  overflow: hidden;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.reading-articles .reading-card:last-child {
  margin-bottom: 0;
}

.reading-card-media {
  margin: 0;
}

.reading-figure {
  margin: 0;
  height: 100%;
}

.reading-figure img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
}

.reading-card-content {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.reading-tag {
  display: inline-flex;
  align-self: flex-start;
  padding: 2px 10px;
  background-color: var(--color-sand);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-clay);
  margin-bottom: 0;
}

.reading-card-content h3 {
  font-size: 1.3rem;
}

.reading-excerpt {
  color: var(--color-text-soft);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.reading-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: var(--space-xs) 0;
}

.reading-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.reading-meta-item dt {
  font-size: 0.85rem;
  color: var(--color-mist);
  font-weight: 500;
}

.reading-meta-item dd {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin: 0;
}

.reading-length {
  font-size: 0.85rem;
  color: var(--color-mist);
  margin-bottom: 0;
}

.reading-link {
  margin-top: auto;
  margin-bottom: 0;
}

.reading-link a {
  color: var(--color-moss);
  font-weight: 500;
}

/* 信息结构观察图 */
.reading-observation {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--container-padding);
}

.reading-observation h2 {
  font-size: 1.4rem;
  margin-bottom: var(--space-md);
}

.observation-figure {
  margin: 0 0 var(--space-md);
}

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

.observation-figure figcaption {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-top: var(--space-xs);
}

.reading-observation > p {
  color: var(--color-text-soft);
  max-width: 760px;
}

/* 延伸跳转 */
.reading-next {
  background-color: var(--color-sand);
  padding: var(--space-lg) 0;
}

.reading-next h2,
.reading-next p {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.reading-next h2 {
  font-size: 1.4rem;
  margin-bottom: var(--space-xs);
}

.reading-next p {
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.reading-next .next-links {
  padding-top: var(--space-xs);
}

/* ------------------------------------------------------------
   Pages · 词条说明页
   ------------------------------------------------------------ */
.terms-intro {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--space-md);
}

.terms-intro .section-title {
  margin-bottom: var(--space-xs);
}

.intro-content p {
  color: var(--color-text-soft);
  max-width: 760px;
}

.terms-figure {
  max-width: var(--container-width);
  margin: 0 auto var(--space-lg);
  padding: 0 var(--container-padding);
}

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

.terms-figure figcaption {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-top: var(--space-xs);
  text-align: center;
}

.term-group {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--space-lg);
}

.group-title {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 1.3rem;
  margin-bottom: var(--space-md);
}

.group-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 12px;
  background-color: var(--color-moss);
  color: var(--color-paper);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.term-card-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.term-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.term-name {
  font-size: 1.1rem;
  margin-bottom: var(--space-xs);
}

.term-definition {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.term-related {
  font-size: 0.9rem;
  margin-bottom: 0;
}

.term-related a {
  color: var(--color-moss);
  font-weight: 500;
}

.group-next {
  font-size: 0.95rem;
}

.group-next a {
  color: var(--color-moss);
  font-weight: 500;
}

.terms-links {
  background-color: var(--color-sand);
  padding: var(--space-lg) 0;
}

.terms-links .section-title,
.terms-links > p {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.terms-links .section-title {
  font-size: 1.4rem;
  margin-bottom: var(--space-xs);
}

.terms-links > p {
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.link-path-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.link-path-list li {
  margin: 0;
}

.link-path-list a {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid rgba(90, 107, 99, 0.2);
  border-radius: 999px;
  color: var(--color-ink);
  font-size: 0.95rem;
  min-height: 44px;
}

.link-path-list a:hover {
  background-color: var(--color-moss);
  border-color: var(--color-moss);
  color: var(--color-paper);
}

/* ------------------------------------------------------------
   Pages · 问答速查页
   ------------------------------------------------------------ */
.faq-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--space-lg);
}

.faq-section .section-heading-row {
  margin-bottom: var(--space-sm);
}

.faq-section .section-heading {
  font-size: 1.4rem;
  margin-bottom: var(--space-xs);
}

.faq-section .section-intro {
  color: var(--color-text-soft);
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.faq-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--transition-fast);
}

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

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-moss);
  flex-shrink: 0;
}

.faq-item[open] .faq-question {
  background-color: var(--color-sand);
}

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

.faq-answer {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  border-top: 1px solid var(--color-sand);
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--color-text-soft);
}

/* 下一步入口 */
.next-steps .section-heading {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  font-size: 1.4rem;
  margin-bottom: var(--space-xs);
}

.next-steps-intro {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.next-steps-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.next-steps-list li {
  margin: 0;
}

.next-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid rgba(90, 107, 99, 0.2);
  border-radius: 999px;
  color: var(--color-ink);
  font-size: 0.95rem;
  min-height: 44px;
}

.next-link:hover {
  background-color: var(--color-moss);
  border-color: var(--color-moss);
  color: var(--color-paper);
}

/* ------------------------------------------------------------
   Pages · 站点指引页
   ------------------------------------------------------------ */
.guide-page {
  background-color: var(--color-paper);
}

.principles-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--space-lg);
}

.principles-section h2 {
  font-size: 1.6rem;
  margin-bottom: var(--space-sm);
}

.principles-intro p {
  color: var(--color-text-soft);
  max-width: 760px;
}

.principle-figure {
  margin: var(--space-md) 0 0;
}

.principle-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.principle-figure figcaption {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-top: var(--space-xs);
}

.boundaries-section {
  background-color: var(--color-sand);
  padding: var(--space-xl) 0;
}

.boundaries-section .container {
  max-width: var(--container-width);
}

.boundaries-section h2 {
  font-size: 1.6rem;
  margin-bottom: var(--space-xs);
}

.boundaries-section > .container > p {
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}

.boundaries-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.boundaries-list li {
  position: relative;
  padding-left: 28px;
  font-size: 0.95rem;
  color: var(--color-ink);
}

.boundaries-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  top: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-clay);
  color: var(--color-paper);
  border-radius: 50%;
  font-size: 0.9rem;
  font-weight: 700;
}

.no-promise-note {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  border-left: 4px solid var(--color-clay);
}

.no-promise-note p {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  margin-bottom: 0;
}

.prep-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--container-padding);
}

.prep-section h2 {
  font-size: 1.6rem;
  margin-bottom: var(--space-xs);
}

.prep-section > p {
  color: var(--color-text-soft);
  margin-bottom: var(--space-md);
}

.prep-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.prep-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(90, 107, 99, 0.15);
}

.prep-card h3 {
  font-size: 1.1rem;
  color: var(--color-moss);
  margin-bottom: var(--space-xs);
}

.prep-card p {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-bottom: 0;
}

.prep-tip {
  font-size: 0.95rem;
}

.prep-tip a {
  color: var(--color-moss);
  font-weight: 500;
}

.site-index-summary {
  background-color: var(--color-ink);
  padding: var(--space-xl) 0;
}

.site-index-summary .container {
  max-width: var(--container-width);
}

.site-index-summary h2 {
  color: var(--color-paper);
  font-size: 1.6rem;
  margin-bottom: var(--space-xs);
}

.site-index-summary > .container > p {
  color: rgba(251, 248, 243, 0.7);
  margin-bottom: var(--space-md);
}

.entry-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.entry-link-card {
  display: block;
  background-color: rgba(251, 248, 243, 0.08);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(251, 248, 243, 0.15);
  transition: background-color var(--transition-fast);
}

.entry-link-card:hover {
  background-color: rgba(251, 248, 243, 0.15);
}

.entry-link-card h3 {
  color: var(--color-paper);
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.entry-link-card p {
  color: rgba(251, 248, 243, 0.6);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ------------------------------------------------------------
   Pages · 404 页
   ------------------------------------------------------------ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--container-padding);
  min-height: 60vh;
}

.error-content {
  text-align: center;
  max-width: 560px;
}

.error-code {
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-clay);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.error-content h1 {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.error-desc {
  color: var(--color-text-soft);
  margin-bottom: var(--space-md);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

/* ------------------------------------------------------------
   Responsive · 响应式
   ------------------------------------------------------------ */
/* 小桌面 / 大平板 */
@media (max-width: 1024px) {
  .hero-announcement .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .hero-figure {
    order: 2;
  }

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

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

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

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    row-gap: var(--space-lg);
  }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .layout-shell {
    grid-template-columns: 220px 1fr;
  }

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

/* 平板 */
@media (max-width: 768px) {
  :root {
    --container-padding: 20px;
  }

  .header-shell {
    min-height: 60px;
  }

  .brand-name {
    font-size: 1.25rem;
  }

  /* 汉堡菜单 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-ink);
    padding: 0;
    border-top: 1px solid rgba(251, 248, 243, 0.1);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-xs) var(--container-padding) var(--space-sm);
    gap: 2px;
    width: 100%;
  }

  .site-nav .nav-list a {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  .site-nav .nav-list a.is-current {
    background-color: rgba(81, 122, 90, 0.6);
  }

  /* 移动端展开状态 */
  .nav-list.is-open {
    display: flex;
    max-height: none;
  }

  .site-nav:has(.nav-list.is-open) {
    max-height: 420px;
  }

  /* 首页 hero */
  .hero-announcement .hero-content {
    padding: var(--space-lg) var(--container-padding) var(--space-md);
  }

  .hero-title {
    font-size: 2rem;
  }

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

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

  /* 首页区块 */
  .home-main .section-block {
    padding: var(--space-lg) 0;
  }

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

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

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

  .reading-media img {
    height: 180px;
  }

  /* 页脚 */
  .footer-shell {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    padding-top: var(--space-md);
  }

  .footer-group {
    border-bottom: 1px solid rgba(251, 248, 243, 0.1);
    padding-bottom: var(--space-sm);
  }

  .footer-group:last-child {
    border-bottom: none;
  }

  /* 内页标题 */
  .page-title {
    font-size: 1.8rem;
  }

  .page-header {
    padding-bottom: var(--space-md);
  }

  /* 能力清单页 */
  .capability-intro-shell {
    grid-template-columns: 1fr;
  }

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

  .filter-sidebar {
    position: static;
    margin-bottom: var(--space-md);
  }

  .filter-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-xs);
  }

  .filter-item {
    flex: 1 1 auto;
    min-width: 140px;
    text-align: center;
  }

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

  .service-comparison .comparison-table-wrap {
    overflow-x: auto;
  }

  .comparison-table {
    min-width: 600px;
  }

  /* 项目交付页 */
  .fact-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .process-step {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: var(--space-xs);
    align-items: start;
  }

  .process-step::before,
  .process-step::after {
    display: none;
  }

  .step-number {
    grid-row: 1 / span 2;
    margin-bottom: 0;
  }

  .process-step h3 {
    grid-column: 2;
  }

  .process-step p {
    grid-column: 2;
  }

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

  .next-links {
    flex-direction: column;
    align-items: stretch;
  }

  .next-links a {
    justify-content: center;
  }

  /* 阅读参考页 */
  .reading-articles .reading-card {
    grid-template-columns: 1fr;
  }

  .reading-card-media,
  .reading-figure {
    height: auto;
  }

  .reading-figure img {
    min-height: 0;
    height: 200px;
  }

  .reading-meta {
    flex-direction: column;
    gap: var(--space-xs);
  }

  /* 词条页 */
  .term-card-list {
    grid-template-columns: 1fr;
  }

  .terms-links .link-path-list {
    flex-direction: column;
    align-items: stretch;
  }

  .link-path-list a {
    justify-content: center;
  }

  /* 站点指引 */
  .prep-grid {
    grid-template-columns: 1fr;
  }

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

  /* FAQ */
  .next-steps-list {
    flex-direction: column;
    align-items: stretch;
  }

  .next-link {
    justify-content: center;
  }

  /* 页脚折叠 */
  .footer-shell {
    display: grid;
    grid-template-columns: 1fr;
  }
}

/* 手机窄屏 */
@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }

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

  .rule-ticker {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .rule-label {
    align-self: flex-start;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .page-title {
    font-size: 1.6rem;
  }

  .page-description {
    font-size: 0.95rem;
  }

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

  .capability-intro-shell,
  .capability-intro-shell .capability-figure {
    margin-bottom: var(--space-sm);
  }

  .reading-articles .reading-card {
    margin-bottom: var(--space-md);
  }

  .reading-figure img {
    height: 160px;
  }

  .footer-bottom {
    padding: var(--space-sm) var(--container-padding);
  }

  .error-code {
    font-size: 3.5rem;
  }

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

  .error-actions .btn-home,
  .error-actions .btn-link {
    justify-content: center;
  }

  .btn-link {
    padding: 12px 16px;
    border-bottom: none;
  }
}

/* ------------------------------------------------------------
   Accessibility · 可访问性与动效
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 滚动出现动画的降级处理：默认可见，动画仅作为增强 */
@media (prefers-reduced-motion: no-preference) {
  .topic-link-card,
  .capability-card,
  .reading-card,
  .fact-item,
  .process-step,
  .term-card,
  .prep-card,
  .entry-link-card {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
  }
}

/* 焦点可见性 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-mist);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}