/* ==========================================================================
  哔咔漫画 · 整站样式表
  视觉方向：黑白影像风 · 灰阶图片 · 墨黑与炭灰文字
  ========================================================================== */

/* --------------------------------------------------------------------------
   Base · 基础变量与重置
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #F4F2EE;
  --color-ink: #111111;
  --color-charcoal: #555555;
  --color-gray: #8A8A8A;
  --color-border: #E5E1DA;
  --color-card: #FFFFFF;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --space-section: 64px;
  --space-block: 32px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* --------------------------------------------------------------------------
   Layout · 全站骨架
   -------------------------------------------------------------------------- */

/* 站点主体容器：由 body 直接承载 flex 纵向布局 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* 统一内容宽度 */
.header-inner,
.site-main > .container,
.footer-inner,
.inner-main,
.home-main {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 首页与内页 main 的宽度统一走 max-width 容器 */
.home-main,
.inner-main {
  padding-top: 0;
  padding-bottom: 0;
}

/* --------------------------------------------------------------------------
   Layout · 页头与主导航
   -------------------------------------------------------------------------- */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

/* 桌面导航 */
.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-list a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  border-radius: var(--radius-sm);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-list a:hover {
  color: var(--color-ink);
  background: #ECE9E3;
}

.nav-list a.is-current {
  background: var(--color-ink);
  color: #FFFFFF;
}

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

.nav-toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-ink);
  border-radius: 1px;
}

/* --------------------------------------------------------------------------
   Layout · 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-ink);
  color: #D8D5CE;
  margin-top: 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  padding-top: 48px;
  padding-bottom: 32px;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 0.875rem;
  color: #A8A49C;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 8px 24px;
}

.footer-links a {
  color: #C9C5BD;
  font-size: 0.875rem;
  padding: 4px 0;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.copyright {
  grid-column: 1 / -1;
  border-top: 1px solid #3A3A3A;
  padding-top: 20px;
  margin-top: 8px;
  font-size: 0.8125rem;
  color: #8A8A8A;
}

/* --------------------------------------------------------------------------
   Components · 通用组件
   -------------------------------------------------------------------------- */

/* 区块标题 */
.section-title {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  line-height: 1.4;
}

/* 区块简介 */
.section-desc {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  margin-top: 8px;
  max-width: 640px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-dark {
  background: var(--color-ink);
  color: #FFFFFF;
}

.btn-dark:hover {
  background: #333333;
  color: #FFFFFF;
}

.btn-outline {
  border: 1px solid var(--color-ink);
  color: var(--color-ink);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-ink);
  color: #FFFFFF;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background: var(--color-ink);
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}

.btn-action:hover {
  background: #333333;
  color: #FFFFFF;
}

/* 封面卡：大图 + 标签 */
.cover-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease;
}

.cover-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: grayscale(100%);
  transition: transform 0.4s ease;
}

.cover-card:hover img {
  transform: scale(1.04);
}

.cover-card:hover {
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.14);
}

.cover-card figcaption {
  padding: 12px 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

/* 标签 */
.cate-tag,
.status-tag,
.rank-tag,
.rank-status,
.tag-status,
.tag-topic {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.75rem;
  line-height: 1.6;
  border-radius: 999px;
  white-space: nowrap;
}

.cate-tag {
  background: #ECE9E3;
  color: var(--color-ink);
}

.status-tag {
  background: var(--color-ink);
  color: #FFFFFF;
}

/* 通用封面墙 */
.cover-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--color-gray);
  padding: 24px 0 0;
}

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

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

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

.breadcrumb-current {
  color: var(--color-ink);
}

/* 页面标题区 */
.page-header {
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.35;
  color: var(--color-ink);
}

.page-description {
  font-size: 1rem;
  color: var(--color-charcoal);
  margin-top: 12px;
  max-width: 720px;
  line-height: 1.8;
}

/* 相关链接条 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
  margin-top: 48px;
}

.related-links-label {
  font-size: 0.875rem;
  color: var(--color-gray);
  margin-right: 4px;
}

.related-links-item {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  padding: 4px 8px;
}

.related-links-item:hover {
  color: var(--color-ink);
  background: #ECE9E3;
  border-radius: var(--radius-sm);
}

/* 通用 guide-entry 入口条 */
.guide-entry {
  margin-top: 48px;
}

/* 滚动淡入动效（不影响初始可见性） */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   Pages · 首页 index.html
   -------------------------------------------------------------------------- */

/* 通知横幅 */
.notice-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--color-ink);
  color: #FFFFFF;
  padding: 10px 24px;
  font-size: 0.875rem;
}

.notice-text {
  color: #D8D5CE;
}

.notice-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid #555555;
  border-radius: 50%;
  color: #D8D5CE;
  font-size: 0.875rem;
  line-height: 1;
  transition: background 0.2s ease, color 0.2s ease;
}

.notice-close:hover {
  background: #FFFFFF;
  color: var(--color-ink);
}

/* 双通道首屏 */
.hero {
  padding: 64px 0 32px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 2.375rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--color-ink);
  line-height: 1.8;
  margin-bottom: 12px;
}

.hero-sub {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-right {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.quick-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.quick-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quick-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--color-ink);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.quick-links a::after {
  content: "→";
  color: var(--color-gray);
  font-size: 1rem;
}

.quick-links a:hover {
  background: #F0EEE9;
  border-color: var(--color-gray);
}

/* hero 主视觉图 */
.hero-figure {
  margin-top: 48px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.hero-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  filter: grayscale(100%);
}

.hero-caption {
  position: absolute;
  left: 24px;
  bottom: 20px;
  background: rgba(17, 17, 17, 0.85);
  color: #FFFFFF;
  padding: 8px 16px;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

/* 工具应用区：筛选面板 + 封面墙 */
.app-section {
  padding: 64px 0;
}

.app-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 48px;
  align-items: start;
}

.filter-panel {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.panel-intro {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  margin: 12px 0 24px;
  line-height: 1.7;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-btn {
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-charcoal);
  background: var(--color-bg);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--color-ink);
  color: var(--color-ink);
}

.filter-btn.is-active {
  background: var(--color-ink);
  color: #FFFFFF;
  border-color: var(--color-ink);
}

.filter-tip {
  margin-top: 24px;
  font-size: 0.8125rem;
  color: var(--color-gray);
  line-height: 1.7;
}

.filter-tip a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.fresh-wall .section-title {
  margin-bottom: 20px;
}

.wall-note {
  margin-top: 16px;
  font-size: 0.8125rem;
  color: var(--color-gray);
  text-align: right;
}

.wall-note a {
  color: var(--color-charcoal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 定位说明 */
.explain-text {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.explain-content {
  font-size: 1rem;
  color: var(--color-charcoal);
  line-height: 2;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

/* 排行榜速览 */
.rank-preview {
  padding: 64px 0 32px;
}

.rank-preview .section-title {
  margin-bottom: 28px;
}

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

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

.rank-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
}

.rank-name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-top: 4px;
}

.rank-reason {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  line-height: 1.7;
  flex: 1;
}

.rank-item a {
  align-self: flex-start;
  font-size: 0.875rem;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
}

.rank-item a:hover {
  color: var(--color-gray);
  border-color: var(--color-gray);
}

/* 编辑专题预览 */
.topic-preview {
  padding: 48px 0;
}

.topic-preview .section-title {
  margin-bottom: 28px;
}

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

.topic-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.topic-card:hover {
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.1);
}

.topic-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: grayscale(100%);
}

.topic-name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 16px 20px 4px;
}

.topic-desc {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  line-height: 1.7;
  padding: 0 20px 12px;
}

.topic-card a {
  display: inline-block;
  margin: 0 20px 20px;
  font-size: 0.875rem;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
}

.topic-card a:hover {
  color: var(--color-gray);
  border-color: var(--color-gray);
}

/* 阅读指南入口条 */
.guide-entry-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: var(--color-ink);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 40px 48px;
  margin: 32px 0 64px;
}

.guide-entry-title {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.guide-entry-inner p {
  color: #B5B1A9;
  font-size: 0.9375rem;
  margin-top: 6px;
}

.guide-entry-inner .btn-outline {
  border-color: #FFFFFF;
  color: #FFFFFF;
  flex-shrink: 0;
}

.guide-entry-inner .btn-outline:hover {
  background: #FFFFFF;
  color: var(--color-ink);
}

/* --------------------------------------------------------------------------
   Pages · 题材分类 bkmh/cate.html
   -------------------------------------------------------------------------- */

/* 分类锚点条 */
.tag-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 32px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.tag-bar a {
  padding: 8px 20px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-charcoal);
  background: var(--color-card);
  transition: background 0.2s ease, color 0.2s ease;
}

.tag-bar a:hover {
  background: var(--color-ink);
  color: #FFFFFF;
  border-color: var(--color-ink);
}

/* 分类分组 */
.category-grid > .section-title {
  margin-bottom: 40px;
}

.category-group {
  margin-bottom: 56px;
}

.category-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.category-head h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.category-desc {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  text-align: right;
  line-height: 1.6;
}

/* 分类页 guide-entry */
.guide-entry {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 64px;
}

.guide-entry-text h2 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 6px;
}

.guide-entry-text p {
  font-size: 0.875rem;
  color: var(--color-charcoal);
}

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

.guide-entry-links a {
  padding: 8px 18px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--color-ink);
  transition: background 0.2s ease, color 0.2s ease;
}

.guide-entry-links a:hover {
  background: var(--color-ink);
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   Pages · 最近更新 bkmh/fresh.html
   -------------------------------------------------------------------------- */

/* 批次索引 */
.batch-index {
  padding-bottom: 40px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.batch-anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.batch-anchor {
  padding: 8px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--color-charcoal);
  background: var(--color-card);
  transition: background 0.2s ease, color 0.2s ease;
}

.batch-anchor:hover {
  background: var(--color-ink);
  color: #FFFFFF;
  border-color: var(--color-ink);
}

/* 更新批次分组 */
.batch-group {
  margin-bottom: 48px;
}

.batch-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding-bottom: 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

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

.update-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  gap: 20px;
  padding: 16px;
  transition: box-shadow 0.3s ease;
}

.update-card:hover {
  box-shadow: 0 6px 20px rgba(17, 17, 17, 0.1);
}

.card-figure {
  flex-shrink: 0;
  width: 120px;
}

.card-cover {
  width: 120px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-sm);
  filter: grayscale(100%);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.card-name {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.card-brief {
  font-size: 0.8125rem;
  color: var(--color-charcoal);
  line-height: 1.7;
}

/* 状态说明 */
.status-note {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 40px;
  margin-bottom: 48px;
}

.note-content {
  margin-top: 16px;
}

.note-content p {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  line-height: 1.8;
  margin-bottom: 8px;
}

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

/* fresh 页 guide-entry */
.guide-entry-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: var(--color-ink);
  border-radius: var(--radius-md);
  padding: 36px 44px;
  margin-bottom: 64px;
}

.guide-entry-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #FFFFFF;
}

.guide-entry-box p {
  color: #B5B1A9;
  font-size: 0.875rem;
  margin-top: 6px;
}

/* --------------------------------------------------------------------------
   Pages · 排行榜 bkmh/rank.html
   -------------------------------------------------------------------------- */

/* 榜单说明 */
.rank-intro {
  padding-bottom: 40px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.rank-intro-content {
  margin-top: 16px;
  max-width: 760px;
}

.rank-intro-content p {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  line-height: 1.9;
  margin-bottom: 12px;
}

.rank-intro-content p:last-child {
  margin-bottom: 0;
}

/* 榜单列表 */
.rank-list {
  padding-bottom: 48px;
}

.rank-list-desc {
  font-size: 0.875rem;
  color: var(--color-gray);
  margin-top: 8px;
}

.rank-items {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.rank-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 20px;
}

.rank-number {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray);
  width: 48px;
  flex-shrink: 0;
  text-align: center;
}

.rank-cover {
  flex-shrink: 0;
  width: 72px;
}

.rank-cover img {
  width: 72px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-sm);
  filter: grayscale(100%);
}

.rank-info {
  flex: 1;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
}

.rank-title {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-right: 8px;
}

.rank-reason {
  width: 100%;
  font-size: 0.8125rem;
  color: var(--color-charcoal);
  line-height: 1.7;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-top: 4px;
  display: none;
}

.rank-item:hover .rank-reason {
  display: block;
}

/* 题材跳转 */
.cate-links {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
}

.cate-links-desc {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  margin-top: 8px;
}

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

.cate-link-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.cate-link-card:hover {
  border-color: var(--color-ink);
  box-shadow: 0 6px 20px rgba(17, 17, 17, 0.08);
}

.cate-link-card h3 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.cate-link-card p {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Pages · 编辑专题 bkmh/topic.html
   -------------------------------------------------------------------------- */

/* 专题锚点 */
.topic-anchor {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 32px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.topic-anchor a {
  padding: 8px 20px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-charcoal);
  background: var(--color-card);
  transition: background 0.2s ease, color 0.2s ease;
}

.topic-anchor a:hover {
  background: var(--color-ink);
  color: #FFFFFF;
  border-color: var(--color-ink);
}

/* 专题卡片 */
.topic-section-title {
  margin-bottom: 32px;
}

.topic-cards {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-bottom: 48px;
}

.topic-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 0;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.topic-card-media img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  filter: grayscale(100%);
}

.topic-card-body {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.topic-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.topic-scene {
  font-size: 0.875rem;
  color: var(--color-gray);
  margin-bottom: 12px;
}

.topic-reason {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  line-height: 1.8;
}

/* 编辑手记 */
.editor-note {
  background: var(--color-ink);
  color: #D8D5CE;
  border-radius: var(--radius-md);
  padding: 36px 44px;
  margin-bottom: 48px;
}

.editor-note h2 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.editor-note p {
  font-size: 0.9375rem;
  line-height: 1.9;
  margin-bottom: 12px;
}

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

/* 专题相关推荐 */
.topic-related {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
  margin-bottom: 64px;
}

.topic-related a {
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--color-charcoal);
  background: var(--color-card);
  transition: background 0.2s ease, color 0.2s ease;
}

.topic-related a:hover {
  background: var(--color-ink);
  color: #FFFFFF;
  border-color: var(--color-ink);
}

/* --------------------------------------------------------------------------
   Pages · 阅读指南 bkmh/guide.html
   -------------------------------------------------------------------------- */

/* 顶部配图 */
.guide-hero-figure {
  margin-bottom: 40px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.guide-hero-figure img {
  width: 100%;
  aspect-ratio: 21 / 8;
  object-fit: cover;
  filter: grayscale(100%);
}

/* 锚点导航 */
.anchor-nav {
  padding-bottom: 32px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--color-border);
}

.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.anchor-list a {
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-charcoal);
  background: var(--color-card);
  transition: background 0.2s ease, color 0.2s ease;
}

.anchor-list a:hover {
  background: var(--color-ink);
  color: #FFFFFF;
  border-color: var(--color-ink);
}

/* FAQ 分组 */
.faq-groups {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding-bottom: 48px;
}

.faq-group-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding-bottom: 12px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.faq-group-desc {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  margin-bottom: 20px;
}

.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background 0.2s ease;
}

.faq-item summary:hover {
  background: #F0EEE9;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--color-gray);
  flex-shrink: 0;
}

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

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

.faq-content {
  padding: 0 20px 20px;
  border-top: 1px solid var(--color-border);
}

.faq-content p {
  padding-top: 16px;
  font-size: 0.875rem;
  color: var(--color-charcoal);
  line-height: 1.85;
}

.faq-content a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
}

/* 反馈说明 */
.feedback-note {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 44px;
  margin-bottom: 64px;
}

.feedback-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.feedback-note p {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  line-height: 1.85;
  margin-bottom: 12px;
}

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

.feedback-note a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Pages · 版权说明 bkmh/copyright.html
   -------------------------------------------------------------------------- */

/* 条款正文 */
.boundary-text {
  padding-bottom: 48px;
}

.boundary-text > .section-title {
  margin-bottom: 32px;
}

.boundary-block {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  margin-bottom: 20px;
}

.boundary-block h3 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.boundary-block p {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  line-height: 1.85;
  margin-bottom: 10px;
}

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

/* 中部配图 */
.image-block {
  margin: 0 0 48px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.image-block img {
  width: 100%;
  aspect-ratio: 21 / 7;
  object-fit: cover;
  filter: grayscale(100%);
}

.image-block figcaption {
  position: absolute;
  left: 20px;
  bottom: 16px;
  background: rgba(17, 17, 17, 0.8);
  color: #FFFFFF;
  padding: 6px 14px;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

/* 反馈路径 */
.feedback-path {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 44px;
  margin-bottom: 64px;
}

.feedback-path h2 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.feedback-path > p {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  line-height: 1.85;
  margin-bottom: 16px;
}

.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.feedback-list li {
  padding-left: 20px;
  position: relative;
}

.feedback-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-gray);
}

.feedback-list a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-size: 0.9375rem;
}

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

/* --------------------------------------------------------------------------
   Pages · 404 错误页
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

.error-panel {
  max-width: 560px;
  text-align: center;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 56px 48px;
}

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

.error-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  line-height: 1.8;
  margin-bottom: 28px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background: var(--color-ink);
  color: #FFFFFF;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  transition: background 0.2s ease;
}

.error-btn:hover {
  background: #333333;
  color: #FFFFFF;
}

.error-tip {
  font-size: 0.8125rem;
  color: var(--color-gray);
  margin-top: 20px;
}

/* --------------------------------------------------------------------------
   Responsive · 响应式断点
   -------------------------------------------------------------------------- */

/* 平板：≤1024px */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .app-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

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

  .guide-entry-inner {
    padding: 32px;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .guide-entry {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

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

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

  .topic-card-media img {
    min-height: 180px;
    max-height: 280px;
  }
}

/* 手机：≤768px */
@media (max-width: 768px) {
  :root {
    --space-section: 40px;
  }

  /* 页头 */
  .header-inner {
    height: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(17, 17, 17, 0.08);
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px;
    gap: 4px;
    display: none;
  }

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

  .nav-list a {
    padding: 12px 16px;
    font-size: 1rem;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 40px;
  }

  .copyright {
    grid-column: 1;
  }

  /* 首页 */
  .hero {
    padding-top: 40px;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-figure {
    margin-top: 32px;
  }

  .hero-figure img {
    aspect-ratio: 4 / 3;
  }

  .app-section {
    padding: 40px 0;
  }

  .filter-panel {
    padding: 24px;
  }

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

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

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

  .guide-entry-inner {
    padding: 28px 24px;
    margin-bottom: 40px;
  }

  .explain-text {
    padding: 28px 0;
  }

  .rank-preview {
    padding-top: 40px;
  }

  /* 内页标题区 */
  .page-header {
    padding: 24px 0 32px;
    margin-bottom: 32px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  /* 分类页 */
  .category-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .category-desc {
    text-align: left;
  }

  /* 最近更新 */
  .update-card {
    flex-direction: column;
    padding: 12px;
  }

  .card-figure {
    width: 100%;
  }

  .card-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .status-note {
    padding: 24px;
  }

  .guide-entry-box {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 16px;
  }

  /* 排行榜 */
  .rank-card {
    flex-wrap: wrap;
    padding: 14px;
  }

  .rank-number {
    width: 32px;
  }

  .rank-cover {
    width: 56px;
  }

  .rank-cover img {
    width: 56px;
  }

  .rank-info {
    gap: 6px;
  }

  .rank-title {
    font-size: 0.9375rem;
  }

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

  /* 编辑专题 */
  .topic-card-body {
    padding: 24px;
  }

  .editor-note {
    padding: 24px;
  }

  /* 阅读指南 */
  .guide-hero-figure img {
    aspect-ratio: 4 / 3;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 0.875rem;
  }

  .feedback-note {
    padding: 24px;
  }

  /* 版权说明 */
  .boundary-block {
    padding: 20px 24px;
  }

  .image-block img {
    aspect-ratio: 4 / 3;
  }

  .feedback-path {
    padding: 24px;
  }

  /* 404 */
  .error-panel {
    padding: 40px 24px;
  }

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

  /* 通用 guide-entry 链接 */
  .guide-entry-links {
    flex-direction: column;
    width: 100%;
  }

  .guide-entry-links a {
    text-align: center;
  }
}

/* 小屏手机：≤390px */
@media (max-width: 390px) {
  .header-inner,
  .site-main > .container,
  .footer-inner,
  .inner-main,
  .home-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .cover-wall {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .cover-card figcaption {
    padding: 8px 10px;
  }

  .cate-tag,
  .status-tag {
    font-size: 0.6875rem;
    padding: 1px 8px;
  }

  .filter-btn {
    padding: 8px 14px;
    font-size: 0.8125rem;
  }

  .rank-card {
    gap: 12px;
  }

  .rank-cover {
    width: 48px;
  }

  .rank-cover img {
    width: 48px;
  }

  .rank-number {
    font-size: 1.25rem;
  }
}