/* ==========================================================================
   base — 基础变量、重置与全局骨架
   ========================================================================== */
:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #2c3e50;
  --color-text-light: #5a6b7b;
  --color-accent: #1abc9c;
  --color-accent-dark: #16a085;
  --color-link: #3498db;
  --color-link-hover: #2180b9;
  --color-danger: #e74c3c;
  --color-border: #e1e8ee;
  --color-code-bg: #f0f4f8;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", Consolas, monospace;
  --container-width: 1200px;
  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(44, 62, 80, 0.06);
  --shadow-md: 0 2px 8px rgba(44, 62, 80, 0.08);
  --breakpoint-mobile: 768px;
}

*,
*::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-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

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

/* 全站统一容器 */
.site-header,
.site-footer .footer-inner,
.site-main,
.inner-main,
.layout-shell {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   layout — 布局系统：页头、主容器、页脚、面包屑、页面标题
   ========================================================================== */

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

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

.brand-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.brand-logo::before {
  content: ">";
  color: var(--color-accent);
  font-weight: 700;
}

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

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

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

.nav-list li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-list li a:hover {
  color: var(--color-accent);
  background-color: rgba(26, 188, 156, 0.06);
}

.nav-list li a.is-current {
  color: var(--color-accent);
  background-color: rgba(26, 188, 156, 0.1);
  border-color: rgba(26, 188, 156, 0.3);
  font-weight: 600;
}

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

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* --- 主内容区 --- */
.site-main {
  padding-top: 48px;
  padding-bottom: 64px;
  min-height: 60vh;
}

.inner-main {
  padding-top: 32px;
  padding-bottom: 64px;
}

/* --- 面包屑 --- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
  font-family: var(--font-mono);
}

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

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

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

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

/* --- 页面标题区（统一内页） --- */
.page-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--color-border);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.page-description {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.7;
}

/* --- 内页双栏布局骨架 --- */
.layout-shell {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

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

.sidebar {
  min-width: 0;
}

/* 侧栏在左：guide 页使用 */
.layout-shell.sidebar-left {
  grid-template-columns: 280px 1fr;
}

.layout-shell.sidebar-left .guide-aside {
  min-width: 0;
}

.layout-shell.sidebar-left .guide-article {
  min-width: 0;
}

/* --- 页脚 --- */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: 48px;
  padding-bottom: 32px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-brand strong {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--color-text);
}

.footer-brand span {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

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

.copyright {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  text-align: center;
}

/* ==========================================================================
   components — 通用组件：按钮、标题、卡片、列表、侧栏模块
   ========================================================================== */

/* --- 区块标题 --- */
.section-title {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

/* --- 按钮 --- */
.btn-primary,
.btn-secondary,
.btn-back,
.btn-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-back {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-back:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-nav {
  background-color: var(--color-accent);
  color: #ffffff;
  border: 1px solid var(--color-accent);
}

.btn-nav:hover {
  background-color: var(--color-accent-dark);
  color: #ffffff;
}

/* --- 侧栏通用 --- */
.sidebar-block {
  margin-bottom: 32px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
}

.sidebar-links {
  list-style: none;
}

.sidebar-links li {
  margin-bottom: 10px;
}

.sidebar-links li a {
  font-size: 0.875rem;
  color: var(--color-text-light);
  display: inline-block;
  padding: 4px 0;
}

.sidebar-links li a:hover {
  color: var(--color-accent);
}

.sidebar-note {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  line-height: 1.6;
}

/* ==========================================================================
   pages — 各页面专属模块
   ========================================================================== */

/* --- 首页 hero --- */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 64px;
  padding: 48px 0;
}

.hero-copy {
  min-width: 0;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  color: var(--color-text);
}

.hero-title::before {
  content: "$ ";
  color: var(--color-accent);
  font-weight: 400;
}

.hero-lead {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 540px;
}

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

.hero-figure {
  min-width: 0;
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* --- 首页频道导航 --- */
.channel-nav-section {
  margin-bottom: 56px;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.channel-tag {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.channel-tag::before {
  content: "#";
  color: var(--color-accent);
  margin-right: 6px;
  font-family: var(--font-mono);
}

.channel-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: rgba(26, 188, 156, 0.04);
}

/* --- 首页最新资讯列表 --- */
.latest-list-section {
  margin-bottom: 56px;
}

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

.latest-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: baseline;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.latest-item h3 {
  grid-column: 1 / -1;
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.latest-item h3 a {
  color: var(--color-text);
}

.latest-item h3 a:hover {
  color: var(--color-accent);
}

.item-summary {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.latest-item time {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  font-family: var(--font-mono);
  white-space: nowrap;
  padding-top: 4px;
}

/* --- 首页专题卡片 --- */
.topic-cards-section {
  margin-bottom: 56px;
}

.topic-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.topic-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.topic-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.topic-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  padding: 16px 20px 4px;
}

.topic-card h3 a {
  color: var(--color-text);
}

.topic-card h3 a:hover {
  color: var(--color-accent);
}

.topic-card p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  padding: 0 20px 20px;
}

/* --- 首页编辑推荐 --- */
.editor-picks-section {
  margin-bottom: 56px;
}

.editor-picks {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pick-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  transition: border-color 0.2s ease;
}

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

.pick-item h3 {
  font-size: 1rem;
  font-weight: 600;
}

.pick-item h3 a {
  color: var(--color-text);
}

.pick-item h3 a:hover {
  color: var(--color-accent);
}

.pick-reason {
  font-size: 0.875rem;
  color: var(--color-text-light);
  text-align: right;
  max-width: 220px;
}

/* --- 首页信息来源与反馈 --- */
.source-feedback-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 8px;
}

.source-feedback-section p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 720px;
}

/* --- 频道分类页 --- */
.channel-grid-section {
  margin-bottom: 48px;
}

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

.channel-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.channel-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.channel-card-body {
  padding: 20px;
}

.channel-title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.channel-title a {
  color: var(--color-text);
}

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

.channel-desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 12px;
}

.channel-link {
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.channel-link::after {
  content: "→";
  font-family: var(--font-mono);
}

.channel-intro-section {
  margin-bottom: 8px;
}

.intro-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.intro-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.intro-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.intro-text {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- 内容专题页 --- */
.topic-list-section {
  margin-bottom: 48px;
}

.section-intro {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

.topic-list-section .topic-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  margin-bottom: 24px;
}

.topic-media {
  min-width: 0;
}

.topic-media img {
  width: 100%;
  height: 100%;
  min-height: 180px;
  object-fit: cover;
}

.topic-body {
  padding: 24px;
  min-width: 0;
}

.topic-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.topic-title a {
  color: var(--color-text);
}

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

.topic-summary {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.topic-link {
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.topic-link::after {
  content: "→";
  font-family: var(--font-mono);
}

.topic-intro-section {
  margin-bottom: 40px;
}

.topic-intro-section p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.topic-related-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.topic-related-section p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.related-list {
  list-style: none;
}

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

.related-list li a {
  font-size: 0.9375rem;
  color: var(--color-text);
  display: inline-block;
  padding: 4px 0;
}

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

/* --- 实用指南页 --- */
.guide-aside {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.guide-aside h2 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.aside-list {
  list-style: none;
  margin-bottom: 24px;
}

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

.aside-list li a {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.aside-list li a:hover {
  color: var(--color-accent);
}

.guide-article {
  min-width: 0;
}

.guide-section {
  margin-bottom: 40px;
  padding: 32px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.guide-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

.guide-section p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.guide-figure {
  margin: 24px 0;
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.guide-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.guide-figure figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  padding: 12px 16px;
  font-family: var(--font-mono);
}

.steps-list {
  list-style: none;
  counter-reset: step;
  margin: 20px 0;
}

.steps-list li {
  counter-increment: step;
  position: relative;
  padding: 12px 0 12px 48px;
  font-size: 0.9375rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.steps-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 12px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.steps-list li a {
  font-weight: 500;
}

/* --- 深度解读页 --- */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

.article-list {
  min-width: 0;
}

.article-list h2 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

.article-list h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.article-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

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

.article-image {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

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

.article-content h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.article-content h3 a {
  color: var(--color-text);
}

.article-content h3 a:hover {
  color: var(--color-accent);
}

.article-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.article-date {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.article-content p:last-child a {
  font-size: 0.875rem;
  font-weight: 500;
}

.analysis-framework {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
}

.analysis-framework h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
}

.analysis-framework p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 12px;
}

.analysis-framework ol {
  padding-left: 0;
  list-style: none;
  counter-reset: framework;
}

.analysis-framework ol li {
  counter-increment: framework;
  position: relative;
  padding: 8px 0 8px 32px;
  font-size: 0.875rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.analysis-framework ol li::before {
  content: counter(framework);
  position: absolute;
  left: 0;
  top: 8px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-code-bg);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.related-links {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.related-links h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
}

.related-links ul {
  list-style: none;
}

.related-links ul li {
  margin-bottom: 10px;
}

.related-links ul li a {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.related-links ul li a:hover {
  color: var(--color-accent);
}

/* --- 404 页 --- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding-top: 48px;
  padding-bottom: 64px;
}

.error-panel {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  max-width: 640px;
  width: 100%;
  box-shadow: var(--shadow-sm);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-danger);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 24px;
}

.error-help {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.error-help a {
  font-weight: 500;
}

/* ==========================================================================
   responsive — 响应式（断点 768px）
   ========================================================================== */

@media (max-width: 768px) {
  /* 容器边距收窄 */
  .site-header,
  .site-footer .footer-inner,
  .site-main,
  .inner-main,
  .layout-shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  /* 汉堡按钮显示 */
  .nav-toggle {
    display: flex;
  }

  /* 导航列表默认收起 */
  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 16px;
  }

  .nav-list li a {
    display: block;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

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

  .site-nav:has(.nav-list.is-open) {
    max-height: 400px;
  }

  /* 首页 hero 改为上下排列 */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px 0;
  }

  .hero-title {
    font-size: 1.875rem;
  }

  .hero-figure img {
    height: 220px;
  }

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

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

  /* 首页专题卡片改为单列 */
  .topic-cards {
    grid-template-columns: 1fr;
  }

  /* 首页最新资讯列表 */
  .latest-item {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .latest-item h3 {
    grid-column: 1;
  }

  /* 编辑推荐 */
  .pick-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 16px;
  }

  .pick-reason {
    text-align: left;
    max-width: none;
  }

  /* 内页双栏改为单栏 */
  .layout-shell,
  .layout-shell.sidebar-left,
  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* 侧栏在正文之后显示 */
  .layout-shell .sidebar,
  .layout-shell.sidebar-left .guide-aside,
  .page-layout .sidebar {
    order: 2;
  }

  .layout-shell .main-content,
  .layout-shell.sidebar-left .guide-article,
  .page-layout .article-list {
    order: 1;
  }

  /* 侧栏不再吸顶 */
  .guide-aside {
    position: static;
  }

  /* 频道网格单列 */
  .channel-grid {
    grid-template-columns: 1fr;
  }

  /* 专题列表卡片改纵向 */
  .topic-list-section .topic-card {
    grid-template-columns: 1fr;
  }

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

  /* 解读文章列表 */
  .article-item {
    grid-template-columns: 1fr;
  }

  .article-image {
    height: 180px;
  }

  /* 页脚四列改两列 */
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  /* 面包屑字号 */
  .breadcrumb {
    font-size: 0.8125rem;
  }

  /* 页面标题 */
  .page-title {
    font-size: 1.5rem;
  }

  /* 404 */
  .error-panel {
    padding: 32px 24px;
  }

  .error-code {
    font-size: 3rem;
  }

  /* 指南页正文区块 */
  .guide-section {
    padding: 20px;
  }
}

/* 极窄屏（390px 手机）微调 */
@media (max-width: 390px) {
  .brand-logo {
    font-size: 1.0625rem;
  }

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

  .footer-col h4 {
    font-size: 0.875rem;
  }

  .footer-col ul li a {
    font-size: 0.8125rem;
  }

  .channel-tags {
    gap: 8px;
  }

  .channel-tag {
    padding: 8px 12px;
    font-size: 0.875rem;
  }

  .topic-body {
    padding: 16px;
  }

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

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