/* ==========================================================
   base — 全局基础样式
   ========================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 26px;
  color: #111111;
  background-color: #f6f4ec;
}

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

a {
  color: #111111;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #666666;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3 {
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: 28px;
  line-height: 36px;
}

h2 {
  font-size: 20px;
  line-height: 28px;
}

h3 {
  font-size: 16px;
  line-height: 24px;
}

p {
  margin-bottom: 12px;
}

.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;
}

/* ==========================================================
   layout — 全站布局骨架
   ========================================================== */
.site-header {
  background-color: #111111;
  border-bottom: 3px solid #ffc81f;
}

.site-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand-link {
  color: #ffffff;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  padding: 8px 0;
  display: inline-block;
  border-bottom: 2px solid transparent;
}

.brand-link:hover {
  color: #ffc81f;
}

.brand-link.is-current {
  color: #ffc81f;
  border-bottom-color: #ffc81f;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  position: relative;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  color: #ffffff;
  font-size: 14px;
  line-height: 20px;
  border-bottom: 2px solid transparent;
}

.nav-list li a:hover {
  color: #ffc81f;
}

.nav-list li a.is-current {
  color: #ffc81f;
  border-bottom-color: #ffc81f;
}

.site-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-footer {
  background-color: #111111;
  margin-top: 64px;
  border-top: 3px solid #ffc81f;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.footer-col h2 {
  color: #ffc81f;
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 12px;
}

.footer-col ul li a {
  display: block;
  padding: 4px 0;
  color: #cccccc;
  font-size: 14px;
  line-height: 22px;
}

.footer-col ul li a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 24px;
  border-top: 1px solid #333333;
}

.footer-bottom p {
  color: #888888;
  font-size: 13px;
  line-height: 20px;
  margin: 0;
}

/* ==========================================================
   layout — 内页布局：主内容 + 右侧目录
   ========================================================== */
.layout-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 40px;
  align-items: start;
}

.page-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 40px;
  align-items: start;
}

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
  width: 100%;
}

.inner-main .page-layout,
.inner-main .layout-shell {
  padding: 0;
}

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

.toc {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 20px;
  position: sticky;
  top: 24px;
}

.toc h2 {
  font-size: 15px;
  line-height: 22px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #111111;
}

.toc ul li {
  margin-bottom: 4px;
}

.toc ul li a {
  display: block;
  padding: 6px 8px;
  font-size: 14px;
  line-height: 20px;
  border-left: 3px solid transparent;
}

.toc ul li a:hover {
  border-left-color: #ffc81f;
  background-color: #f6f4ec;
}

/* ==========================================================
   components — 面包屑 / 页面标题区
   ========================================================== */
.breadcrumb {
  padding: 16px 0 8px;
  font-size: 13px;
  line-height: 20px;
  color: #666666;
}

.breadcrumb a {
  color: #666666;
}

.breadcrumb a:hover {
  color: #111111;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: #999999;
}

.breadcrumb-current {
  color: #111111;
  font-weight: 600;
}

.page-header {
  padding: 16px 0 24px;
  border-bottom: 3px solid #111111;
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  line-height: 36px;
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  line-height: 26px;
  color: #666666;
  max-width: 680px;
}

.section-intro {
  color: #666666;
  max-width: 680px;
  margin-bottom: 20px;
}

/* ==========================================================
   components — 通用按钮 / 文本链接
   ========================================================== */
.btn-primary {
  display: inline-block;
  background-color: #ffc81f;
  color: #111111;
  font-size: 15px;
  font-weight: 700;
  line-height: 20px;
  padding: 12px 24px;
  border: 2px solid #111111;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.btn-primary:hover {
  background-color: #ffffff;
  color: #111111;
}

.btn-secondary {
  display: inline-block;
  background-color: transparent;
  color: #111111;
  font-size: 15px;
  font-weight: 600;
  line-height: 20px;
  padding: 12px 24px;
  border: 2px solid #111111;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.btn-secondary:hover {
  background-color: #111111;
  color: #ffffff;
}

.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  line-height: 20px;
  color: #111111;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 2px;
}

.text-link:hover {
  color: #666666;
  border-bottom-color: #111111;
}

/* ==========================================================
   components — 封面卡（首页 + 题材库共用）
   ========================================================== */
.cover-card {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.cover-card:hover {
  transform: translateY(-4px);
  border-color: #ffc81f;
}

.cover-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.cover-card figcaption {
  padding: 12px 14px 14px;
}

.cover-tag {
  display: inline-block;
  font-size: 12px;
  line-height: 18px;
  font-weight: 600;
  color: #111111;
  background-color: #ffc81f;
  border-radius: 4px;
  padding: 2px 8px;
  margin-bottom: 8px;
}

.cover-card figcaption p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

/* ==========================================================
   components — 题材标签
   ========================================================== */
.theme-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.theme-tags li a {
  display: inline-block;
  font-size: 14px;
  line-height: 20px;
  font-weight: 600;
  padding: 8px 16px;
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.theme-tags li a:hover {
  background-color: #ffc81f;
  color: #111111;
}

/* ==========================================================
   components — 步骤（编号圆圈 + 文本）
   ========================================================== */
.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  background-color: #111111;
  color: #ffc81f;
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
}

.step-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-text p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0 0 8px;
}

.step-text strong {
  display: block;
  font-size: 15px;
  line-height: 22px;
  margin-bottom: 4px;
}

/* ==========================================================
   components — 专题推荐卡
   ========================================================== */
.topic-card {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: #ffc81f;
}

.topic-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.topic-card h3 {
  padding: 12px 14px 0;
  font-size: 16px;
  line-height: 24px;
}

.topic-card p {
  padding: 6px 14px 0;
  font-size: 14px;
  line-height: 22px;
  color: #666666;
}

.topic-card a {
  display: inline-block;
  margin: 8px 14px 14px;
  font-size: 13px;
  font-weight: 600;
  line-height: 20px;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 2px;
}

.topic-card a:hover {
  border-bottom-color: #111111;
}

/* ==========================================================
   components — 时间线（更新速递）
   ========================================================== */
.timeline {
  position: relative;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 28px;
}

.timeline-marker {
  position: relative;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #ffc81f;
  border: 2px solid #111111;
  margin-top: 6px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 20px;
  bottom: 0;
  width: 2px;
  background-color: #111111;
}

.timeline-item:last-child::before {
  display: none;
}

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

.timeline-content h3 {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0 0 8px;
}

.timeline-content a {
  font-size: 13px;
  font-weight: 600;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 2px;
}

/* ==========================================================
   components — 榜单条目
   ========================================================== */
.rank-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid #dddddd;
}

.rank-num {
  font-size: 24px;
  font-weight: 700;
  line-height: 32px;
  color: #ffc81f;
  min-width: 40px;
}

.rank-content {
  flex: 1;
  min-width: 0;
}

.rank-content h3 {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 4px;
}

.rank-content p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.rank-tag {
  display: inline-block;
  font-size: 12px;
  line-height: 18px;
  font-weight: 600;
  padding: 4px 10px;
  background-color: #f6f4ec;
  border: 1px solid #111111;
  border-radius: 999px;
  white-space: nowrap;
}

.rank-tag:hover {
  background-color: #ffc81f;
}

/* ==========================================================
   components — FAQ 折叠器
   ========================================================== */
.faq-item {
  border: 2px solid #111111;
  border-radius: 8px;
  background-color: #ffffff;
  margin-bottom: 12px;
}

.faq-item summary {
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 22px;
  cursor: pointer;
  position: relative;
  list-style: none;
  padding-right: 40px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  transition: transform 0.2s ease;
}

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

.faq-item p {
  padding: 0 16px 14px;
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.faq-item p a {
  font-weight: 600;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 1px;
}

/* ==========================================================
   components — 内容概览卡（首页 overview）
   ========================================================== */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.overview-card {
  background-color: #111111;
  color: #ffffff;
  border-radius: 8px;
  padding: 24px 20px;
  border: 2px solid #111111;
}

.overview-card h3 {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 8px;
  color: #ffc81f;
}

.overview-card p {
  font-size: 14px;
  line-height: 22px;
  color: #cccccc;
  margin-bottom: 12px;
}

.overview-card a {
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 2px;
}

.overview-card a:hover {
  color: #ffc81f;
}

/* ==========================================================
   components — 相关链接
   ========================================================== */
.related-links {
  margin-top: 32px;
  padding: 20px;
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
}

.related-links-label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
}

.related-links-item {
  display: inline-block;
  font-size: 14px;
  line-height: 20px;
  margin-right: 16px;
  padding: 6px 12px;
  background-color: #f6f4ec;
  border-radius: 4px;
}

.related-links-item:hover {
  background-color: #ffc81f;
}

/* ==========================================================
   components — 目录（右侧）
   ========================================================== */
.toc ul li a {
  display: block;
  padding: 6px 8px;
  font-size: 14px;
  line-height: 20px;
  border-left: 3px solid transparent;
}

.toc ul li a:hover {
  border-left-color: #ffc81f;
  background-color: #f6f4ec;
}

/* ==========================================================
   pages — index：hero 首屏
   ========================================================== */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 3px solid #111111;
}

.hero-copy h1 {
  font-size: 32px;
  line-height: 40px;
  margin-bottom: 12px;
}

.hero-copy p {
  font-size: 15px;
  line-height: 26px;
  color: #666666;
  margin-bottom: 20px;
  max-width: 480px;
}

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

.hero-figure {
  border: 2px solid #111111;
  border-radius: 8px;
  overflow: hidden;
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ==========================================================
   pages — index：题材横条
   ========================================================== */
.theme-strip {
  padding: 40px 0;
  border-bottom: 3px solid #111111;
}

.section-title {
  font-size: 20px;
  line-height: 28px;
  margin-bottom: 16px;
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background-color: #ffc81f;
}

/* ==========================================================
   pages — index：内容概览
   ========================================================== */
.overview {
  padding: 40px 0;
  border-bottom: 3px solid #111111;
}

/* ==========================================================
   pages — index：封面墙
   ========================================================== */
.cover-wall {
  padding: 40px 0;
  border-bottom: 3px solid #111111;
}

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

.cover-grid .cover-card:nth-child(2n) img {
  aspect-ratio: 1 / 1;
}

.cover-grid .cover-card:nth-child(3n) img {
  aspect-ratio: 3 / 4;
}

.wall-link {
  margin-top: 20px;
  text-align: center;
}

.wall-link a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border: 2px solid #111111;
  border-radius: 6px;
  background-color: #ffffff;
}

.wall-link a:hover {
  background-color: #ffc81f;
}

/* ==========================================================
   pages — index：更新速览
   ========================================================== */
.update-teaser {
  padding: 40px 0;
  border-bottom: 3px solid #111111;
}

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

.update-item {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 20px;
}

.update-date {
  display: inline-block;
  font-size: 12px;
  line-height: 18px;
  font-weight: 600;
  color: #666666;
  background-color: #f6f4ec;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.update-item h3 {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 6px;
}

.update-item p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.update-more {
  margin-top: 20px;
}

.update-more a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border: 2px solid #111111;
  border-radius: 6px;
  background-color: #ffffff;
}

.update-more a:hover {
  background-color: #ffc81f;
}

/* ==========================================================
   pages — index：榜单风向预览
   ========================================================== */
.ranking-teaser {
  padding: 40px 0;
  border-bottom: 3px solid #111111;
}

.ranking-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.rank-list {
  border-top: 2px solid #111111;
}

.rank-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid #dddddd;
}

.rank-genre {
  font-size: 15px;
  font-weight: 700;
  line-height: 22px;
  min-width: 0;
}

.rank-list li p {
  font-size: 13px;
  line-height: 20px;
  color: #666666;
  margin: 0;
  flex: 1;
}

.topic-cards {
  display: grid;
  gap: 16px;
}

.rank-more {
  margin-top: 20px;
}

.rank-more a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border: 2px solid #111111;
  border-radius: 6px;
  background-color: #ffffff;
}

.rank-more a:hover {
  background-color: #ffc81f;
}

/* ==========================================================
   pages — index：阅读指南入口
   ========================================================== */
.guide-entry {
  padding: 40px 0;
  border-bottom: 3px solid #111111;
}

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

.guide-steps li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 16px;
}

.guide-steps li p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
  flex: 1;
}

.guide-more {
  margin-top: 20px;
}

/* ==========================================================
   pages — index：版权反馈条
   ========================================================== */
.feedback-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 3px solid #111111;
}

.feedback-bar p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.feedback-bar a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border: 2px solid #111111;
  border-radius: 6px;
  background-color: #ffc81f;
  white-space: nowrap;
}

.feedback-bar a:hover {
  background-color: #ffffff;
}

/* ==========================================================
   pages — category：题材库
   ========================================================== */
.theme-matrix {
  margin-bottom: 48px;
}

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

.theme-block {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 20px;
}

.theme-block h3 {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 8px;
  display: inline-block;
  background-color: #ffc81f;
  padding: 2px 10px;
  border-radius: 4px;
}

.theme-audience {
  font-size: 13px;
  line-height: 20px;
  color: #111111;
  font-weight: 600;
  margin-bottom: 6px;
}

.theme-desc {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.cover-flow {
  margin-bottom: 48px;
}

.cover-flow-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.cover-flow-grid .cover-card img {
  aspect-ratio: 3 / 4;
}

.cover-flow-grid .cover-card:nth-child(2n) img {
  aspect-ratio: 1 / 1;
}

.genre-notes {
  margin-bottom: 48px;
}

.notes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.note-card {
  background-color: #111111;
  border-radius: 8px;
  padding: 20px;
}

.note-card h3 {
  color: #ffc81f;
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 8px;
}

.note-card p {
  color: #cccccc;
  font-size: 14px;
  line-height: 22px;
  margin: 0;
}

.section-links {
  margin-top: 20px;
  display: flex;
  gap: 16px;
}

.section-links a {
  font-size: 14px;
  font-weight: 600;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 2px;
}

/* ==========================================================
   pages — updates：更新速递
   ========================================================== */
.update-log {
  margin-bottom: 48px;
}

.featured-topics {
  margin-bottom: 48px;
}

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

.topic-figure {
  overflow: hidden;
}

.topic-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.update-note {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 20px;
}

.update-note h2 {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 8px;
}

.update-note p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.update-note p a {
  font-weight: 600;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 1px;
}

/* ==========================================================
   pages — ranking：榜单
   ========================================================== */
.rank-list {
  margin-bottom: 48px;
}

.rank-items .rank-item {
  padding: 20px 0;
}

.rank-items .rank-item:first-child {
  border-top: 2px solid #111111;
}

.topic-recommend {
  margin-bottom: 48px;
}

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

.ranking-method {
  background-color: #111111;
  border-radius: 8px;
  padding: 24px;
}

.ranking-method h2 {
  color: #ffc81f;
  margin-bottom: 8px;
}

.ranking-method p {
  color: #cccccc;
  font-size: 14px;
  line-height: 22px;
  margin: 0 0 8px;
}

.ranking-method p:last-child {
  margin-bottom: 0;
}

/* ==========================================================
   pages — guide：阅读指南
   ========================================================== */
.task-find,
.task-cover,
.task-ranking,
.task-feedback {
  margin-bottom: 48px;
}

.step-list {
  display: grid;
  gap: 16px;
}

.step-list.compact {
  gap: 12px;
}

.cover-demo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.cover-steps h3 {
  margin-bottom: 12px;
}

.cover-demo-figure {
  border: 2px solid #111111;
  border-radius: 8px;
  overflow: hidden;
}

.cover-demo-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.cover-demo-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 20px;
  color: #666666;
  background-color: #ffffff;
}

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

.point-card {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 20px;
}

.point-card h3 {
  font-size: 15px;
  line-height: 22px;
  margin-bottom: 8px;
}

.point-card p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

/* ==========================================================
   pages — about：关于本站
   ========================================================== */
.site-position {
  margin-bottom: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.position-text h2 {
  margin-bottom: 12px;
}

.position-text p {
  font-size: 15px;
  line-height: 26px;
  color: #333333;
}

.position-figure {
  border: 2px solid #111111;
  border-radius: 8px;
  overflow: hidden;
}

.position-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.position-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 20px;
  color: #666666;
  background-color: #ffffff;
}

.organize-way {
  margin-bottom: 48px;
}

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

.organize-card {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 20px;
}

.organize-card h3 {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 8px;
  color: #111111;
}

.organize-card p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.not-do {
  margin-bottom: 48px;
}

.boundary-list {
  display: grid;
  gap: 16px;
}

.boundary-list li {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 16px 20px;
}

.boundary-list li h3 {
  font-size: 15px;
  line-height: 22px;
  margin-bottom: 6px;
}

.boundary-list li p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.editorial-principle {
  margin-bottom: 48px;
}

.principle-list {
  display: grid;
  gap: 16px;
}

.principle-item {
  background-color: #ffffff;
  border-left: 4px solid #ffc81f;
  padding: 16px 20px;
}

.principle-item h3 {
  font-size: 15px;
  line-height: 22px;
  margin-bottom: 6px;
}

.principle-item p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.principle-closing {
  margin-top: 24px;
  font-size: 15px;
  line-height: 26px;
  color: #333333;
}

.principle-closing a {
  font-weight: 600;
  border-bottom: 2px solid #ffc81f;
  padding-bottom: 1px;
  margin-right: 12px;
}

/* ==========================================================
   pages — feedback：版权反馈
   ========================================================== */
.feedback-content {
  min-width: 0;
}

.copyright-statement {
  margin-bottom: 48px;
}

.copyright-statement h2 {
  margin-bottom: 12px;
}

.copyright-statement p {
  font-size: 15px;
  line-height: 26px;
  color: #333333;
}

.content-source {
  margin-bottom: 48px;
}

.content-source > p {
  font-size: 15px;
  line-height: 26px;
  color: #333333;
}

.source-list {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.source-list li {
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 16px 20px;
}

.source-list li h3 {
  font-size: 15px;
  line-height: 22px;
  margin-bottom: 6px;
}

.source-list li p {
  font-size: 14px;
  line-height: 22px;
  color: #666666;
  margin: 0;
}

.feedback-steps {
  margin-bottom: 48px;
}

.feedback-process {
  display: grid;
  gap: 16px;
}

.feedback-process li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feedback-note {
  background-color: #111111;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 32px;
}

.feedback-note h2 {
  color: #ffc81f;
  margin-bottom: 8px;
}

.feedback-note p {
  color: #cccccc;
  font-size: 14px;
  line-height: 22px;
  margin: 0 0 8px;
}

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

.content-media {
  border: 2px solid #111111;
  border-radius: 8px;
  overflow: hidden;
  margin: 24px 0;
}

.content-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.content-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 20px;
  color: #666666;
  background-color: #ffffff;
}

.content-media-inline {
  max-width: 680px;
}

/* ==========================================================
   pages — 404
   ========================================================== */
.error-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-panel {
  text-align: center;
  background-color: #ffffff;
  border: 2px solid #111111;
  border-radius: 8px;
  padding: 48px 40px;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  color: #ffc81f;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  line-height: 32px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  line-height: 26px;
  color: #666666;
  margin-bottom: 24px;
}

.error-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 24px;
  background-color: #ffc81f;
  border: 2px solid #111111;
  border-radius: 6px;
}

.error-link:hover {
  background-color: #ffffff;
}

/* ==========================================================
   responsive — 响应式断点
   ========================================================== */
@media (max-width: 1024px) {
  .overview-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

  .featured-topics .topic-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .layout-shell,
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 200px;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .site-nav {
    flex-wrap: wrap;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 0 16px;
    gap: 0;
  }

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

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

  .nav-list li a {
    padding: 12px 8px;
    border-bottom: 1px solid #333333;
    width: 100%;
  }

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

  .layout-shell,
  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 0 16px;
  }

  .toc {
    position: static;
    order: 99;
  }

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

  .hero-copy h1 {
    font-size: 28px;
    line-height: 36px;
  }

  .ranking-preview {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cover-demo {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .site-position {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .feedback-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

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

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

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

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

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

  .organize-cards {
    grid-template-columns: 1fr;
  }

  .featured-topics .topic-cards {
    grid-template-columns: 1fr;
  }

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

  .point-cards {
    grid-template-columns: 1fr;
  }

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

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

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    text-align: center;
  }

  .rank-item {
    flex-wrap: wrap;
  }

  .rank-tag {
    margin-left: 56px;
  }
}