/* ============================================================
   base — 基础变量、重置与全局排版
   ============================================================ */
:root {
  --color-primary: #1B2A4A;
  --color-bg: #F5F6F8;
  --color-card: #FFFFFF;
  --color-accent: #FFC845;
  --color-text: #2A2F36;
  --color-text-secondary: #5A6472;
  --color-border: #D8DCE2;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", monospace;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-xxl: 64px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

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

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(27, 42, 74, 0.35);
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
  color: #2c4070;
  text-decoration-color: var(--color-primary);
}

ul, ol {
  list-style: none;
}

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

/* 焦点可见性，保证无障碍 */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ============================================================
   layout — 全站统一骨架：页头 / 主容器 / 页脚
   ============================================================ */
.site-header {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-link {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

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

.nav-list li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-list li a:hover {
  background-color: rgba(27, 42, 74, 0.06);
  color: var(--color-primary);
}

.nav-list li a.is-current {
  background-color: var(--color-primary);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.site-main {
  flex: 1;
  width: 100%;
}

/* 内页统一容器 */
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

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

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

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

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

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

.page-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

/* 页脚 */
.site-footer {
  background-color: var(--color-card);
  border-top: 2px solid var(--color-border);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.4fr;
  gap: 40px;
}

.footer-logo {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

.footer-links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ============================================================
   components — 公共组件
   ============================================================ */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn-primary:hover {
  background-color: #24375e;
  color: #fff;
  text-decoration: none;
}

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

.btn-secondary:hover {
  background-color: rgba(27, 42, 74, 0.06);
  color: var(--color-primary);
  text-decoration: none;
}

/* 区块标题 */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 640px;
}

.section-more {
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
}

.section-more:hover {
  text-decoration: underline;
}

/* 折叠问答 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-question {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 20px 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* 相关链接 */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
}

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

.related-links-item {
  color: var(--color-primary);
  text-decoration: none;
}

.related-links-item:hover {
  text-decoration: underline;
}

/* 侧栏布局通用 */
.layout-shell {
  display: grid;
  gap: 32px;
  align-items: start;
}

/* 等宽编号字体 */
.topic-rank,
.step-num,
.step-number,
.catalog-id {
  font-family: var(--font-mono);
}

/* 图片容器 */
figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-top: 8px;
}

/* 提示信息 */
.step-tip {
  background-color: rgba(255, 200, 69, 0.12);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.tip-label {
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
  font-size: 14px;
}

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

/* 表单相关（无表单，仅通用） */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   pages — 首页
   ============================================================ */
.home-main {
  width: 100%;
}

/* 首屏 hero */
.hero {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 40px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tag-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-right: 4px;
}

.tag-item {
  font-size: 13px;
  color: var(--color-primary);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 14px;
  text-decoration: none;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.tag-item:hover {
  border-color: var(--color-primary);
  background-color: rgba(27, 42, 74, 0.04);
  text-decoration: none;
}

.hero-figure {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(27, 42, 74, 0.06);
}

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

/* 分类总览 */
.categories {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
}

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

.category-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.category-card:hover {
  box-shadow: 0 6px 16px rgba(27, 42, 74, 0.08);
  transform: translateY(-2px);
}

.category-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.category-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  padding: 16px 16px 4px;
}

.category-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  padding: 0 16px 12px;
  flex-grow: 1;
}

.category-link {
  font-size: 14px;
  font-weight: 600;
  padding: 0 16px 16px;
  text-decoration: none;
}

.category-link:hover {
  text-decoration: underline;
}

/* 最近更新 */
.updates {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
}

.updates .section-head,
.update-list {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

.update-item {
  display: grid;
  grid-template-columns: 110px 120px 1fr;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.update-date {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-text-secondary);
}

.update-column {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.update-desc {
  font-size: 15px;
  color: var(--color-text);
}

/* 热门榜单 */
.topics {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
}

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

.topic-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.topic-rank {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  min-width: 32px;
  text-align: center;
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  color: #fff;
}

.topic-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.topic-note {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* 阅读路径 */
.path {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
}

.path .section-head {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.path-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.path-step {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.step-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 2px 10px;
}

.step-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

.step-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  flex-grow: 1;
}

.step-link {
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.step-link:hover {
  text-decoration: underline;
}

/* 站点说明与反馈入口 */
.support {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.support-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

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

.support-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  flex-grow: 1;
}

.support-link {
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.support-link:hover {
  text-decoration: underline;
}

/* ============================================================
   pages — 作品目录 works.html
   ============================================================ */
.catalog-overview {
  margin-bottom: 32px;
}

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

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

.overview-figure figcaption {
  padding: 8px 16px 12px;
}

.catalog-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}

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

.catalog-section .section-desc {
  margin-bottom: 24px;
}

.catalog-group {
  margin-bottom: 32px;
}

.group-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
}

.catalog-table {
  font-size: 14px;
}

.catalog-table thead {
  background-color: var(--color-primary);
  color: #fff;
}

.catalog-table th {
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
}

.catalog-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
}

.catalog-table tbody tr:nth-child(even) {
  background-color: rgba(27, 42, 74, 0.03);
}

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

.catalog-name {
  font-weight: 600;
  color: var(--color-text);
}

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

.catalog-count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.catalog-actions {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 24px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}

.catalog-actions p {
  margin-bottom: 8px;
}

.catalog-actions a {
  font-weight: 600;
}

/* 侧栏 */
.catalog-side {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.side-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.side-block {
  margin-bottom: 20px;
}

.side-block:last-child {
  margin-bottom: 0;
}

.side-subtitle {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.side-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.side-item {
  font-size: 14px;
  color: var(--color-text);
}

.side-tag {
  display: inline-block;
  font-size: 12px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 2px 10px;
  margin: 2px 4px 2px 0;
  color: var(--color-text-secondary);
}

/* ============================================================
   pages — 题材筛选 genres.html
   ============================================================ */
.filters-section {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
}

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

.filter-group:last-child {
  margin-bottom: 0;
}

.filter-group-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-tag {
  font-size: 14px;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 16px;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.filter-tag:hover {
  background-color: rgba(27, 42, 74, 0.06);
  border-color: var(--color-primary);
  text-decoration: none;
}

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

.result-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  align-items: start;
}

.result-media {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.result-media img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.result-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.result-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

.result-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.result-tag {
  font-size: 12px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 2px 10px;
  color: var(--color-text-secondary);
}

.result-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.result-desc a {
  font-weight: 600;
}

.result-link {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
  text-decoration: none;
}

.result-link:hover {
  text-decoration: underline;
}

/* 筛选使用说明 */
.note-section {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 32px;
}

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

.note-text:last-child {
  margin-bottom: 0;
}

.note-text a {
  font-weight: 600;
}

/* ============================================================
   pages — 阅读对比 compare.html
   ============================================================ */
.sidebar-left {
  grid-template-columns: 240px 1fr;
}

.dimension-menu {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: 88px;
}

.aside-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.dim-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dim-list li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.dim-list li a:hover {
  background-color: rgba(27, 42, 74, 0.06);
  color: var(--color-primary);
}

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

.compare-figure {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

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

.compare-figure figcaption {
  padding: 8px 16px 12px;
}

.switch-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
}

.switch-tab {
  font-size: 15px;
  font-weight: 600;
  padding: 10px 20px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  min-height: 44px;
}

.switch-tab:hover {
  border-color: var(--color-primary);
}

.switch-tab.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.switch-panel-content[hidden] {
  display: none;
}

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

.compare-table {
  font-size: 14px;
  margin-bottom: 24px;
}

.compare-table thead {
  background-color: var(--color-primary);
  color: #fff;
}

.compare-table th {
  padding: 12px;
  text-align: left;
  font-weight: 600;
}

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

.compare-table tbody tr:nth-child(even) {
  background-color: rgba(27, 42, 74, 0.03);
}

.suggestion-box {
  background-color: rgba(255, 200, 69, 0.12);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 16px 20px;
}

.suggestion-box h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

/* 下一步建议 */
.next-steps {
  margin-top: 32px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.next-steps h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.next-steps p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.next-steps a {
  font-weight: 600;
  margin-right: 16px;
}

/* ============================================================
   pages — 阅读指南 guide.html
   ============================================================ */
.sidebar-right {
  grid-template-columns: 1fr 320px;
}

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

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

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

.guide-figure figcaption {
  padding: 8px 16px 12px;
}

.guide-step {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.step-head .step-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 2px 10px;
  flex-shrink: 0;
}

.step-head .step-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}

.step-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 16px;
}

.step-text a {
  font-weight: 600;
}

.step-tip {
  margin-top: 12px;
}

/* 侧栏 */
.guide-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.check-card,
.resource-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
}

.check-mark {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--color-primary);
  margin-top: 2px;
}

.check-mark::after {
  content: "✓";
}

.resource-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.resource-item {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding-left: 16px;
  position: relative;
}

.resource-item::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-primary);
  font-weight: 700;
}

/* FAQ */
.faq-section {
  margin-top: 40px;
}

.faq-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
}

/* ============================================================
   pages — 站点说明 about.html
   ============================================================ */
.about-section {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
}

.about-section .section-title {
  margin-bottom: 16px;
}

.content-media-inline {
  margin: 20px 0;
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.content-media-inline img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.content-media-inline figcaption {
  padding: 8px 16px 12px;
}

.section-body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.section-body p {
  margin-bottom: 12px;
}

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

.content-org-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 20px 0;
}

.org-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.org-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.org-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.section-tip {
  font-size: 14px;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  line-height: 1.7;
}

.section-tip a {
  font-weight: 600;
  margin-right: 12px;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

.boundary-list li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  padding-left: 24px;
  position: relative;
}

.boundary-list li::before {
  content: "×";
  position: absolute;
  left: 4px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 16px;
}

.update-mechanism {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 20px 0;
}

.mechanism-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.mechanism-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.mechanism-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ============================================================
   pages — 帮助反馈 feedback.html
   ============================================================ */
.feedback-types {
  margin-bottom: 32px;
}

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

.feedback-type-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feedback-type-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

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

.feedback-type-card .feedback-example {
  font-size: 13px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-top: 4px;
}

.feedback-process {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
}

.process-intro {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.process-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.step-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 2px 10px;
  align-self: flex-start;
}

.process-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

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

.process-figure {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 16px;
}

.process-figure img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.process-figure figcaption {
  padding: 8px 16px 12px;
}

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

.feedback-faq details.faq-item {
  padding: 0;
}

.feedback-faq details.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

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

.feedback-faq details.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
}

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

.feedback-faq details.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.feedback-related {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.feedback-related p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.feedback-related a {
  font-weight: 600;
  margin-right: 16px;
}

/* ============================================================
   pages — 404
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
  flex: 1;
}

.error-panel {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  max-width: 560px;
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
}

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

.error-help a {
  font-weight: 600;
}

/* ============================================================
   responsive — 响应式断点
   ============================================================ */
/* 平板及以下 */
@media (max-width: 1024px) {
  .catalog-layout {
    grid-template-columns: 1fr;
  }

  .catalog-side {
    order: 2;
  }

  .sidebar-left {
    grid-template-columns: 1fr;
  }

  .dimension-menu {
    position: static;
    order: 2;
  }

  .sidebar-right {
    grid-template-columns: 1fr;
  }

  .guide-side {
    order: 2;
  }

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

/* 手机端 */
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    min-height: 60px;
    padding: 8px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .nav-toggle {
    display: flex;
    order: 3;
  }

  .site-nav {
    order: 4;
    flex-basis: 100%;
    justify-content: flex-start;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding: 8px 0;
    gap: 2px;
  }

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

  .nav-list li a {
    display: block;
    padding: 12px 16px;
    font-size: 16px;
  }

  .inner-main {
    padding: 24px 16px 48px;
  }

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

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

  .breadcrumb {
    font-size: 13px;
  }

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

  /* 首页 */
  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .hero-title {
    font-size: 30px;
  }

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

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

  .categories {
    padding: 32px 16px;
  }

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

  .category-card {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }

  .category-card img {
    width: 100%;
    height: 140px;
  }

  .category-name {
    padding-top: 12px;
  }

  .updates {
    padding: 32px 0;
  }

  .updates .section-head,
  .update-list {
    padding-left: 16px;
    padding-right: 16px;
  }

  .update-item {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 0;
  }

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

  .topics {
    padding: 32px 16px;
  }

  .topic-list {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .topic-item {
    padding: 14px 16px;
  }

  .path {
    padding: 32px 0;
  }

  .path .section-head {
    padding-left: 16px;
    padding-right: 16px;
  }

  .path-steps {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 0 16px;
  }

  .support {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 32px 16px;
  }

  /* 作品目录 */
  .catalog-overview {
    margin-bottom: 24px;
  }

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

  .catalog-group {
    overflow-x: auto;
  }

  .catalog-table {
    min-width: 560px;
  }

  /* 题材筛选 */
  .filters-section {
    padding: 20px 16px;
  }

  .result-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .result-media img {
    height: 160px;
  }

  .filter-tag {
    padding: 8px 14px;
  }

  /* 对比 */
  .compare-figure img {
    height: 140px;
  }

  .switch-tabs {
    flex-wrap: wrap;
  }

  .compare-table {
    min-width: 520px;
  }

  .dimension-menu {
    padding: 20px 16px;
  }

  /* 指南 */
  .guide-figure img {
    height: 160px;
  }

  .guide-step {
    padding: 20px 16px;
  }

  .step-head {
    flex-wrap: wrap;
  }

  .check-card,
  .resource-card {
    padding: 20px 16px;
  }

  /* 说明 */
  .about-section {
    padding: 24px 16px;
  }

  .content-org-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .update-mechanism {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 反馈 */
  .feedback-type-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .feedback-process {
    padding: 24px 16px;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .process-figure img {
    height: 140px;
  }

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

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

/* 小屏手机 */
@media (max-width: 480px) {
  .brand-name {
    font-size: 19px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .tag-cloud {
    gap: 6px;
  }

  .tag-item {
    font-size: 12px;
    padding: 4px 10px;
  }

  .section-head {
    flex-direction: column;
    gap: 8px;
  }

  .section-more {
    align-self: flex-start;
  }

  .category-card img {
    height: 120px;
  }

  .topic-rank {
    font-size: 20px;
    min-width: 28px;
  }

  .catalog-actions {
    padding: 16px;
  }

  .catalog-side {
    padding: 16px;
  }

  .result-item {
    padding: 16px;
  }

  .result-media img {
    height: 140px;
  }

  .note-section {
    padding: 20px 16px;
  }

  .compare-figure img {
    height: 120px;
  }

  .switch-tab {
    padding: 8px 14px;
    font-size: 14px;
  }

  .suggestion-box {
    padding: 14px 16px;
  }

  .next-steps {
    padding: 20px 16px;
  }

  .guide-figure img {
    height: 140px;
  }

  .step-head .step-title {
    font-size: 18px;
  }

  .step-text {
    font-size: 14px;
  }

  .step-tip {
    flex-direction: column;
    gap: 4px;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 16px 14px;
    font-size: 14px;
  }

  .content-media-inline img {
    height: 160px;
  }

  .boundary-list li {
    font-size: 14px;
  }

  .feedback-type-card {
    padding: 20px 16px;
  }

  .error-panel {
    padding: 24px 16px;
  }

  .error-code {
    font-size: 40px;
  }

  .error-panel h1 {
    font-size: 20px;
  }

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

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

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