/* ============================================================
   base / reset & 基础变量
   ============================================================ */
:root {
  --color-primary: #24364f;
  --color-primary-light: #2f4665;
  --color-accent: #c0392b;
  --color-bg: #f5f6f8;
  --color-card: #ffffff;
  --color-text: #333a45;
  --color-text-secondary: #555e6b;
  --color-border: #e1e5ea;
  --color-border-strong: #c9d2dc;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --inner-container-width: 960px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition: 0.2s 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-family);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

img,
figure {
  display: block;
}

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

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

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

ul,
ol {
  list-style: none;
}

/* ============================================================
   layout / 全站骨架
   ============================================================ */
.site-header {
  background-color: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  gap: 16px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand:hover {
  color: #ffffff;
  opacity: 0.88;
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav .nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.site-nav .nav-list li a:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
}

.site-nav .nav-list li a.is-current {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.16);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  background-color: transparent;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #ffffff;
  border-radius: 1px;
}

.site-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.home-main {
  padding-top: 0;
  padding-bottom: 48px;
}

.inner-main {
  max-width: var(--inner-container-width);
  padding-top: 24px;
  padding-bottom: 56px;
}

.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 28px;
}

.footer-brand {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin-bottom: 16px;
}

.footer-nav a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  padding: 4px 0;
}

.footer-nav a:hover {
  color: #ffffff;
}

.footer-copy {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 16px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

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

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

.breadcrumb-sep {
  color: var(--color-border-strong);
}

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

/* 页面标题区 */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 720px;
}

/* 通用内容媒体 */
.content-media {
  margin: 16px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
}

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

.content-media figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
}

.content-media-inline {
  max-width: 480px;
}

/* 相关链接条 */
.related-links {
  margin-top: 32px;
  padding: 16px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 14px;
}

.related-links-label {
  font-weight: 600;
  color: var(--color-primary);
}

.related-links-item {
  color: var(--color-text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
}

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

/* ============================================================
   components / 通用组件
   ============================================================ */
/* 卡片基础 */
.genre-card,
.duty-card,
.note-card,
.tip-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.genre-card:hover,
.duty-card:hover,
.note-card:hover,
.tip-item:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 2px 8px rgba(36, 54, 79, 0.08);
}

.genre-card h3,
.duty-card h3,
.note-card h3,
.tip-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.genre-card p,
.duty-card p,
.note-card p,
.tip-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* FAQ 折叠项 */
.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.faq-item summary {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

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

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

.faq-item .faq-answer,
.faq-item > p {
  padding: 0 18px 14px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.faq-item .faq-answer a {
  color: var(--color-accent);
  font-weight: 500;
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 560px;
}

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

.comparison-table thead th {
  background-color: var(--color-primary);
  color: #ffffff;
  font-weight: 600;
  white-space: nowrap;
}

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

.comparison-table tbody th {
  font-weight: 600;
  color: var(--color-primary);
  background-color: #f8f9fb;
  white-space: nowrap;
}

.comparison-table tbody tr:hover {
  background-color: #fafbfc;
}

/* ============================================================
   pages / 首页
   ============================================================ */
/* 首屏安全区 */
.hero-safe {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0 40px;
}

.hero-copy h1 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.hero-copy > p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
  max-width: 520px;
}

.hero-action {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  transition: background-color var(--transition);
}

.hero-action:hover {
  background-color: var(--color-primary-light);
  color: #ffffff;
}

.hero-note {
  font-size: 13px;
  color: var(--color-text-secondary);
}

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

.hero-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

/* 题材分类面板 */
.genre-panel {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 40px;
}

.panel-head {
  margin-bottom: 24px;
}

.panel-head h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.panel-head p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

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

.genre-grid .genre-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.genre-grid .genre-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.genre-grid .genre-card p {
  font-size: 13px;
  color: var(--color-text-secondary);
  flex-grow: 1;
  line-height: 1.6;
}

.genre-grid .genre-card a {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: 8px;
  align-self: flex-start;
}

.panel-figure {
  margin-top: 24px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.panel-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

/* 更新公告预览 */
.notice-list {
  margin-bottom: 40px;
}

.notice-list > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
  padding-left: 12px;
  border-left: 4px solid var(--color-accent);
}

.notice-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 12px;
  transition: border-color var(--transition);
}

.notice-item:hover {
  border-color: var(--color-border-strong);
}

.notice-item time {
  display: block;
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

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

.notice-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 8px;
}

.notice-item a {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

/* 站内更新记录 */
.update-record {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.update-record > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.record-list li {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 14px;
  line-height: 1.6;
}

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

.record-date {
  flex-shrink: 0;
  min-width: 88px;
  color: var(--color-accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.record-desc {
  color: var(--color-text);
}

/* 阅读指南路径提示 */
.guide-path {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  margin-bottom: 40px;
}

.guide-path > h2 {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
}

.path-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.path-steps .step {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 18px;
}

.step-num {
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}

.path-steps .step h3 {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 6px;
}

.path-steps .step p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
}

.guide-link {
  display: inline-block;
  padding: 8px 20px;
  background-color: #ffffff;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.guide-link:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* 版权与反馈提示带 */
.boundary-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 32px;
}

.boundary-strip p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.strip-links {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

.strip-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 6px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), background-color var(--transition);
}

.strip-links a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg);
}

/* ============================================================
   pages / 内页通用
   ============================================================ */
/* 题材分类页 */
.genre-index {
  margin-bottom: 40px;
}

.genre-index > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.genre-index > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  max-width: 680px;
}

.genre-index .genre-grid {
  margin-top: 20px;
}

.genre-card-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-grow: 1;
}

.genre-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.genre-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex-grow: 1;
}

.genre-audience {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
}

.genre-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  align-self: flex-start;
}

.genre-comparison {
  margin-bottom: 40px;
}

.genre-comparison > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.genre-comparison > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.genre-tips {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 32px;
}

.genre-tips > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.genre-tips > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

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

.tips-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.tips-note a {
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 4px;
}

/* 更新公告页 */
.announcement-list {
  margin-bottom: 40px;
}

.announcement-list > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
  padding-left: 12px;
  border-left: 4px solid var(--color-accent);
}

.announcement-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  margin-bottom: 14px;
  transition: border-color var(--transition);
}

.announcement-item:hover {
  border-color: var(--color-border-strong);
}

.announcement-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.announcement-meta time {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.announcement-tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

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

.announcement-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 8px;
}

.announcement-item > a {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

.update-log {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.update-log > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.update-log > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.update-record-row {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 14px;
  line-height: 1.6;
}

.update-record-row:last-child {
  border-bottom: none;
}

.record-page {
  flex-shrink: 0;
  min-width: 120px;
  font-weight: 600;
  color: var(--color-primary);
}

.update-figure {
  margin-top: 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

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

.update-figure figcaption {
  padding: 8px 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.update-guide-links {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.update-guide-links > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.update-guide-links > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.guide-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-link-list a {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: border-color var(--transition), background-color var(--transition);
}

.guide-link-list a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-card);
}

/* 阅读指南页 */
.step-flow {
  margin-bottom: 40px;
}

.step-flow > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
}

.step-flow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.step-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.step-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 2px 8px rgba(36, 54, 79, 0.08);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}

.step-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.step-card p a {
  color: var(--color-accent);
  font-weight: 500;
}

.step-tip {
  font-size: 13px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  border-left: 3px solid var(--color-accent);
}

.step-tip strong {
  color: var(--color-primary);
}

.step-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-card);
}

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

.step-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
}

.checklist {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 32px;
}

.checklist > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.checklist-list li {
  padding: 8px 0 8px 28px;
  position: relative;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.65;
  border-bottom: 1px dashed var(--color-border);
}

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

.checklist-list li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 16px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--color-primary);
  border-radius: 2px;
}

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

.guide-faq > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.faq-more {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.faq-more a {
  font-weight: 600;
  color: var(--color-accent);
}

/* 编辑部说明页 */
.duties {
  margin-bottom: 40px;
}

.duties > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
}

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

.methods {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.methods > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
}

.method-media {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
  align-items: start;
}

.method-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

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

.method-figure figcaption {
  padding: 8px 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.method-list li {
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-border);
  position: relative;
  padding-left: 40px;
}

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

.method-list li::before {
  content: attr(data-num);
  position: absolute;
  left: 0;
  top: 14px;
  width: 26px;
  height: 26px;
  line-height: 26px;
  text-align: center;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  border-radius: 50%;
  font-variant-numeric: tabular-nums;
}

.method-list li h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.method-list li p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.representative {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 32px;
}

.representative > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.representative > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 18px;
}

.representative-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}

.rep-link {
  display: block;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  transition: border-color var(--transition), background-color var(--transition);
}

.rep-link:hover {
  border-color: var(--color-primary);
  background-color: var(--color-card);
}

.rep-title {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.rep-desc {
  display: block;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.related-guide {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.related-guide a {
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 4px;
}

/* 版权与内容边界页 */
.principles {
  margin-bottom: 40px;
}

.principles > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.principles-intro {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 18px;
  max-width: 680px;
}

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

.principle-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.principle-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.boundaries {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.boundaries > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
}

.boundaries-wrap {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 24px;
  align-items: start;
}

.boundaries-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

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

.boundaries-list p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.boundaries-list ul li {
  padding: 8px 0 8px 22px;
  position: relative;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
  border-bottom: 1px dashed var(--color-border);
}

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

.boundaries-list ul li::before {
  content: "·";
  position: absolute;
  left: 6px;
  top: 7px;
  font-size: 20px;
  color: var(--color-accent);
  font-weight: 700;
}

.copyright-statement {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 32px;
}

.copyright-statement > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.statement-body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.statement-body p:last-child {
  margin-bottom: 0;
}

/* 问题反馈页 */
.feedback-flow {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
  align-items: center;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.flow-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

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

.flow-figure figcaption {
  padding: 8px 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.flow-intro h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.flow-intro p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

.faq-section > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
}

.faq-group {
  margin-bottom: 20px;
}

.faq-group > h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 10px 0;
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: 12px;
}

.troubleshoot-section {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.troubleshoot-section > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.section-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 18px;
}

.trouble-steps li {
  padding: 12px 0 12px 40px;
  position: relative;
  border-bottom: 1px dashed var(--color-border);
}

.trouble-steps li:last-child {
  border-bottom: none;
}

.trouble-steps li::before {
  content: attr(data-num);
  position: absolute;
  left: 0;
  top: 14px;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  font-variant-numeric: tabular-nums;
}

.trouble-step h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.trouble-step p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.feedback-note {
  margin-bottom: 32px;
}

.feedback-note > h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 18px;
}

.note-tip {
  font-size: 14px;
  color: var(--color-text-secondary);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  border-left: 3px solid var(--color-accent);
}

.note-tip a {
  font-weight: 600;
  color: var(--color-accent);
}

/* 404 页 */
.error-main {
  max-width: var(--inner-container-width);
  padding-top: 60px;
  padding-bottom: 80px;
}

.error-panel {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.error-panel h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto 24px;
  line-height: 1.7;
}

.error-action {
  display: inline-block;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  transition: background-color var(--transition);
}

.error-action:hover {
  background-color: var(--color-primary-light);
  color: #ffffff;
}

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

.error-help a {
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 6px;
}

/* ============================================================
   responsive / 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .site-main {
    padding: 0 20px;
  }

  .inner-main {
    padding-top: 20px;
  }

  .hero-safe {
    gap: 28px;
    padding: 36px 0 32px;
  }

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

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

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

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

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

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

@media (max-width: 768px) {
  .site-header {
    position: sticky;
  }

  .header-inner {
    flex-wrap: wrap;
    min-height: 56px;
    padding: 8px 16px;
    gap: 8px;
  }

  .brand {
    font-size: 18px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    width: 100%;
    flex-basis: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    margin-top: 8px;
  }

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

  .site-nav .nav-list li a {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 15px;
  }

  .site-main {
    padding: 0 16px;
  }

  .home-main {
    padding-bottom: 32px;
  }

  .inner-main {
    padding-top: 16px;
    padding-bottom: 40px;
  }

  .hero-safe {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 28px 0 24px;
  }

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

  .hero-figure img {
    height: 200px;
  }

  .genre-panel {
    padding: 20px;
  }

  .genre-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

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

  .boundary-strip {
    flex-direction: column;
    align-items: flex-start;
  }

  .strip-links {
    width: 100%;
  }

  .strip-links a {
    flex: 1;
    text-align: center;
  }

  .step-flow-grid {
    grid-template-columns: 1fr;
  }

  .method-media {
    grid-template-columns: 1fr;
  }

  .boundaries-wrap {
    grid-template-columns: 1fr;
  }

  .feedback-flow {
    grid-template-columns: 1fr;
  }

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

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

  .principle-list {
    grid-template-columns: 1fr;
  }

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

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

  .footer-inner {
    padding: 24px 16px 20px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 0;
  }

  .footer-nav a {
    padding: 8px 0;
  }

  .page-title {
    font-size: 22px;
  }

  .breadcrumb {
    margin-bottom: 16px;
  }
}

@media (max-width: 480px) {
  .genre-grid {
    grid-template-columns: 1fr;
  }

  .genre-panel {
    padding: 16px;
  }

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

  .record-list li {
    flex-direction: column;
    gap: 4px;
  }

  .record-date {
    min-width: auto;
  }

  .update-record-row {
    flex-direction: column;
    gap: 4px;
  }

  .record-page {
    min-width: auto;
  }

  .comparison-table {
    min-width: 480px;
  }

  .error-panel {
    padding: 36px 20px;
  }

  .error-code {
    font-size: 48px;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 滚动出现动画（不阻塞初始可见性） */
@media (prefers-reduced-motion: no-preference) {
  .genre-card,
  .notice-item,
  .step-card,
  .duty-card,
  .principle-card,
  .note-card,
  .announcement-item {
    animation: fade-in 0.3s ease both;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}