/* ==========================================================================
   great-chem.cn 动漫论坛 — 全站样式表
   社区市集风 · 暖色底 · 分区色标签
   ========================================================================== */

/* ==========================================================================
   Base — 变量、重置、全局基础
   ========================================================================== */

:root {
  --color-bg: #f4f1ea;
  --color-surface: #ffffff;
  --color-surface-soft: #faf8f3;
  --color-ink: #1f2328;
  --color-ink-soft: #4b5563;
  --color-ink-mute: #6b7280;
  --color-line: #e5e0d6;
  --color-line-soft: #efeae0;

  --color-blue: #2f6fed;
  --color-blue-dark: #2458c4;
  --color-blue-soft: #eaf1fe;

  --color-red: #d94b4b;
  --color-red-dark: #b83a3a;
  --color-red-soft: #fdecec;

  --color-green: #0f9d6f;
  --color-green-dark: #0b7d58;
  --color-green-soft: #e6f5ef;

  --color-orange: #d97706;
  --color-orange-dark: #b56205;
  --color-orange-soft: #fdf1e0;

  --color-purple: #7c5cff;
  --color-purple-dark: #6447d9;
  --color-purple-soft: #f0ecff;

  --color-pink: #e7559b;
  --color-pink-dark: #c94380;
  --color-pink-soft: #fdeaf3;

  --font-stack: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;

  --container-width: 1120px;
  --content-narrow: 760px;
  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(31, 35, 40, 0.06);
}

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

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

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ink);
  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-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--color-blue-dark);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.4;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

p {
  margin-bottom: 0.5em;
}

p:last-child {
  margin-bottom: 0;
}

/* 视觉隐藏，仅供屏幕阅读器 */
.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 — 全站骨架、容器、页头、页脚
   ========================================================================== */

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

.site-inner {
  width: 100%;
}

.inner-main {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* --- 页头 --- */

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.site-brand {
  flex-shrink: 0;
}

.site-brand a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--color-ink);
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-blue);
}

.brand-slogan {
  font-size: 12px;
  color: var(--color-ink-mute);
  letter-spacing: 0.02em;
}

.site-nav {
  margin-left: auto;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-ink-soft);
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-list li a:hover {
  color: var(--color-blue);
  background-color: var(--color-blue-soft);
}

.nav-list li a.is-current {
  color: var(--color-blue);
  background-color: var(--color-blue-soft);
  font-weight: 600;
}

.btn-post-guide {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  background-color: var(--color-blue);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.15s ease;
}

.btn-post-guide:hover {
  background-color: var(--color-blue-dark);
  color: #fff;
}

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

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- 面包屑 --- */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--color-ink-mute);
}

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

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

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

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

/* --- 页面标题区 --- */

.page-header {
  padding: 24px 0 20px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.page-description {
  font-size: 16px;
  color: var(--color-ink-soft);
  max-width: var(--content-narrow);
}

/* --- 页脚 --- */

.site-footer {
  flex-shrink: 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-blue);
  margin-bottom: 6px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 10px;
}

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

.footer-col h4 {
  font-size: 15px;
  color: var(--color-ink);
  margin-bottom: 14px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: var(--color-ink-soft);
}

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

.footer-boundary p {
  font-size: 13px;
  color: var(--color-ink-mute);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--color-line-soft);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-ink-mute);
  max-width: var(--container-width);
  margin: 0 auto;
}

/* --- 通用区块 --- */

.section-block {
  padding: 56px 0;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: 22px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.section-heading p {
  font-size: 15px;
  color: var(--color-ink-soft);
  max-width: 640px;
}

/* 图片容器 */
.content-media {
  margin: 0;
}

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

.content-media figcaption {
  font-size: 13px;
  color: var(--color-ink-mute);
  padding-top: 8px;
  line-height: 1.6;
}

/* --- 侧栏布局 --- */

.page-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

.sidebar-left {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

.sidebar-left .sidebar-index,
.sidebar-left .season-index,
.sidebar-left .content-index {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.archive-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

.archive-layout .season-index {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

/* ==========================================================================
   Components — 标签、按钮、卡片、列表、FAQ 等通用组件
   ========================================================================== */

/* --- 标签 --- */

.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  line-height: 1.6;
  white-space: nowrap;
}

.tag-works {
  background-color: var(--color-blue-soft);
  color: var(--color-blue);
}

.tag-doujin {
  background-color: var(--color-green-soft);
  color: var(--color-green);
}

.tag-tracking {
  background-color: var(--color-red-soft);
  color: var(--color-red);
}

.tag-event {
  background-color: var(--color-orange-soft);
  color: var(--color-orange);
}

.tag-featured {
  background-color: var(--color-purple-soft);
  color: var(--color-purple);
}

.tag-story {
  background-color: var(--color-pink-soft);
  color: var(--color-pink);
}

.tag-rules {
  background-color: #f0f1f3;
  color: var(--color-ink-soft);
}

.tag-activity {
  background-color: var(--color-orange-soft);
  color: var(--color-orange);
}

.tag-tsui {
  background-color: var(--color-red-soft);
  color: var(--color-red);
}

.tag-hot {
  background-color: var(--color-red-soft);
  color: var(--color-red);
}

.tag-fantasy {
  background-color: var(--color-purple-soft);
  color: var(--color-purple);
}

.tag-slice {
  background-color: var(--color-green-soft);
  color: var(--color-green);
}

.tag-suspense {
  background-color: var(--color-blue-soft);
  color: var(--color-blue);
}

.tag-romance {
  background-color: var(--color-pink-soft);
  color: var(--color-pink);
}

.tag-tear {
  background-color: var(--color-blue-soft);
  color: var(--color-blue-dark);
}

.tag-spoiler {
  background-color: var(--color-orange-soft);
  color: var(--color-orange);
}

/* --- 按钮 --- */

.btn-primary,
.btn-secondary,
.btn-text,
.btn-back-home,
.btn-back-board {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-blue-dark);
  border-color: var(--color-blue-dark);
  color: #fff;
}

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

.btn-secondary:hover {
  background-color: var(--color-blue-soft);
  color: var(--color-blue-dark);
}

.btn-text {
  padding: 0;
  min-height: 44px;
  color: var(--color-blue);
  font-weight: 600;
}

.btn-text:hover {
  color: var(--color-blue-dark);
  text-decoration: underline;
}

.btn-back-home,
.btn-back-board {
  background-color: var(--color-blue);
  color: #fff;
  border: 1px solid var(--color-blue);
}

.btn-back-home:hover,
.btn-back-board:hover {
  background-color: var(--color-blue-dark);
  border-color: var(--color-blue-dark);
  color: #fff;
}

/* --- FAQ 折叠 --- */

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  margin-bottom: 12px;
}

.faq-item summary {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-ink-mute);
  font-weight: 400;
}

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

.faq-item p {
  padding: 0 18px 14px;
  font-size: 15px;
  color: var(--color-ink-soft);
}

/* --- 相关入口条 --- */

.related-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
}

.related-links-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-item {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-ink-soft);
  transition: border-color 0.15s ease, color 0.15s ease;
}

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

/* ==========================================================================
   Home — 首页模块
   ========================================================================== */

/* --- 首屏文字区 --- */

.hero-text {
  padding: 72px 0 56px;
}

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

.hero-text h1 {
  font-size: 36px;
  color: var(--color-ink);
  margin-bottom: 16px;
  max-width: 640px;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-ink-soft);
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-scroll-hint {
  font-size: 14px;
  color: var(--color-ink-mute);
}

.content-media-primary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.content-media-primary img {
  height: 360px;
  border-radius: var(--radius-lg);
}

/* --- 版块索引（市集摊位） --- */

.board-index {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.board-index .section-heading {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 28px;
}

.board-stalls {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.stall-item {
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 22px;
  border-top-width: 3px;
}

.stall-works {
  border-top-color: var(--color-blue);
}

.stall-doujin {
  border-top-color: var(--color-green);
}

.stall-tracking {
  border-top-color: var(--color-red);
}

.stall-featured {
  border-top-color: var(--color-purple);
}

.stall-event {
  border-top-color: var(--color-orange);
}

.stall-story {
  border-top-color: var(--color-pink);
}

.stall-name {
  font-size: 17px;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.stall-desc {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 10px;
}

.stall-example {
  font-size: 13px;
  color: var(--color-ink-mute);
  padding-top: 10px;
  border-top: 1px dashed var(--color-line);
}

/* --- 精选话题时间线 --- */

.featured-topic {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

.topic-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 16px;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

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

.topic-thumb img {
  width: 160px;
  height: 96px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.topic-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.topic-title {
  font-size: 17px;
  color: var(--color-ink);
  margin: 6px 0 4px;
}

.topic-desc {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* --- 待答问题 --- */

.open-questions {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.open-questions .section-heading {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 28px;
}

.question-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  gap: 16px;
}

.question-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 14px 18px;
}

.question-category {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-blue);
}

.question-text {
  font-size: 15px;
  color: var(--color-ink);
}

.question-item a {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

/* --- 季度档案预览 --- */

.season-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.season-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}

.season-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-red);
  background-color: var(--color-red-soft);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.season-name {
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.season-desc {
  font-size: 14px;
  color: var(--color-ink-soft);
  max-width: 480px;
}

.season-months {
  display: flex;
  gap: 10px;
}

.month-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink-soft);
  transition: border-color 0.15s ease, color 0.15s ease;
}

.month-link:hover {
  border-color: var(--color-red);
  color: var(--color-red);
}

.season-preview .btn-text {
  margin-top: 16px;
}

/* --- 发帖指南 --- */

.guide {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.guide .section-heading {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 28px;
}

.guide-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.guide-step {
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
}

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

.guide-step .step-title {
  font-size: 17px;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.guide-step .step-action,
.guide-step .step-expect,
.guide-step .step-exception {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 6px;
  line-height: 1.7;
}

.guide-step .step-action::before {
  content: "动作：";
  font-weight: 600;
  color: var(--color-blue);
}

.guide-step .step-expect::before {
  content: "预期：";
  font-weight: 600;
  color: var(--color-green);
}

.guide-step .step-exception::before {
  content: "异常：";
  font-weight: 600;
  color: var(--color-orange);
}

.guide .btn-text {
  display: block;
  width: fit-content;
  margin: 24px auto 0;
}

/* --- 社区规范摘要 --- */

.rule-summary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.rule-faq {
  max-width: 720px;
}

.rule-summary .btn-text {
  margin-top: 8px;
}

/* --- 首页相关入口 --- */

.home-main .related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  padding-bottom: 48px;
}

/* ==========================================================================
   Inner Pages — 内页模块
   ========================================================================== */

/* --- 版块总览 --- */

.board-table {
  margin-bottom: 40px;
}

.board-table h2,
.question-fit h2,
.tips h2 {
  font-size: 22px;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.section-note {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 20px;
  max-width: 640px;
}

.board-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.board-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  min-width: 680px;
}

.board-table-wrap th {
  background-color: var(--color-surface-soft);
  font-weight: 600;
  color: var(--color-ink);
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-line);
  white-space: nowrap;
}

.board-table-wrap td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-line-soft);
  vertical-align: top;
  color: var(--color-ink-soft);
  line-height: 1.7;
}

.board-table-wrap tr:last-child td {
  border-bottom: none;
}

.board-table-wrap td:first-child {
  font-weight: 600;
  color: var(--color-ink);
  white-space: nowrap;
}

.board-cover {
  margin: 24px 0 8px;
}

.board-cover img {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.board-cover figcaption {
  font-size: 13px;
  color: var(--color-ink-mute);
  padding-top: 8px;
}

.question-fit {
  margin-bottom: 40px;
}

.fit-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.fit-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.fit-item h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.fit-item p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 10px;
}

.fit-item a {
  font-size: 14px;
  font-weight: 600;
}

.tips-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.tip-item {
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.tip-item h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.tip-item p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* --- 作品大全 --- */

.entry-groups {
  display: grid;
  gap: 48px;
}

.index-group h2 {
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.group-intro {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 16px;
}

.content-media-inline {
  margin-bottom: 16px;
}

.content-media-inline img {
  max-height: 200px;
  border-radius: var(--radius-lg);
}

.entry-list {
  display: grid;
  gap: 12px;
}

.entry-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.entry-item h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.entry-meta {
  font-size: 13px;
  color: var(--color-ink-mute);
  margin-bottom: 6px;
}

.entry-desc {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* 侧栏索引 */

.sidebar-index,
.season-index,
.content-index {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.sidebar-index h2,
.season-index h2,
.content-index h2 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.index-list li,
.season-list li {
  margin-bottom: 2px;
}

.index-list a,
.season-list a {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--color-ink-soft);
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.index-list a:hover,
.season-list a:hover {
  background-color: var(--color-blue-soft);
  color: var(--color-blue);
}

.index-note {
  font-size: 13px;
  color: var(--color-ink-mute);
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--color-line-soft);
}

/* 提问格式 */

.question-format {
  margin-top: 48px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.question-format h2 {
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.question-format > p {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 16px;
}

.format-example {
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 16px;
}

.format-example p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 4px;
}

.format-example strong {
  color: var(--color-ink);
}

.format-tip {
  font-size: 14px;
  color: var(--color-ink-mute);
}

.format-tip a {
  font-weight: 600;
}

/* --- 最新番剧更新 --- */

.month-groups {
  display: grid;
  gap: 48px;
}

.season-block h2 {
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.month-group {
  margin-bottom: 24px;
}

.month-group h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.post-list {
  display: grid;
  gap: 10px;
}

.post-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.post-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-red);
  background-color: var(--color-red-soft);
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.post-desc {
  font-size: 14px;
  color: var(--color-ink-soft);
  flex: 1;
  min-width: 200px;
}

/* 状态图例 */

.status-legend {
  margin-top: 48px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.status-legend h2 {
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 16px;
}

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

.legend-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
}

.tag-status {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  background-color: var(--color-red-soft);
  color: var(--color-red);
  white-space: nowrap;
  flex-shrink: 0;
}

.legend-item dd {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
}

/* --- 热门推荐 --- */

.question-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.question-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.question-card h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-top: 4px;
}

.question-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  flex: 1;
}

.question-card a {
  font-size: 14px;
  font-weight: 600;
  margin-top: 4px;
}

.question-list-media {
  margin: 24px 0 8px;
}

.question-list-media img {
  width: 100%;
  max-height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.question-list-media figcaption {
  font-size: 13px;
  color: var(--color-ink-mute);
  padding-top: 8px;
}

.recommend-structure {
  margin-bottom: 40px;
}

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

.structure-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.structure-item h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.structure-item p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.entry-links {
  margin-bottom: 40px;
}

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

.entry-card {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.entry-card:hover {
  border-color: var(--color-blue);
  box-shadow: var(--shadow-card);
}

.entry-card h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.entry-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* --- 剧情介绍 --- */

.content-area {
  display: grid;
  gap: 40px;
}

.norm-content h2,
.spoiler-notice h2,
.related-links h2 {
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

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

.norm-group h3 {
  font-size: 17px;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.norm-group p {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 10px;
}

.norm-list {
  list-style: disc;
  padding-left: 20px;
  margin-top: 8px;
}

.norm-list li {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin-bottom: 6px;
}

.spoiler-example {
  margin: 16px 0;
}

.spoiler-example img {
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.spoiler-example figcaption {
  font-size: 13px;
  color: var(--color-ink-mute);
  padding-top: 8px;
}

.spoiler-compare {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.spoiler-ok,
.spoiler-bad {
  border-radius: var(--radius-lg);
  padding: 20px;
}

.spoiler-ok {
  background-color: var(--color-green-soft);
  border: 1px solid #bfe3d4;
}

.spoiler-bad {
  background-color: var(--color-red-soft);
  border: 1px solid #f0c9c9;
}

.spoiler-ok h3,
.spoiler-bad h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.spoiler-ok h3 {
  color: var(--color-green);
}

.spoiler-bad h3 {
  color: var(--color-red);
}

.example-text {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 8px;
  line-height: 1.7;
}

.spoiler-ok p:last-child,
.spoiler-bad p:last-child {
  font-size: 13px;
  color: var(--color-ink-mute);
}

.related-links .link-list {
  display: grid;
  gap: 10px;
}

.related-links .link-list li a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-ink-soft);
  transition: border-color 0.15s ease, color 0.15s ease;
}

.related-links .link-list li a:hover {
  border-color: var(--color-blue);
  color: var(--color-blue);
}

/* --- 社区规范 --- */

.guide-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.guide-steps h2 {
  grid-column: 1 / -1;
  font-size: 22px;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.section-intro {
  grid-column: 1 / -1;
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 8px;
}

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

.step-card h3 {
  font-size: 17px;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.step-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 8px;
  line-height: 1.7;
}

.step-card p strong {
  color: var(--color-ink);
  font-weight: 600;
  margin-right: 4px;
}

.step-card p a {
  font-weight: 600;
}

.spoiler-demo-figure {
  margin: 24px 0 8px;
}

.spoiler-demo-figure img {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.spoiler-demo-figure figcaption {
  font-size: 13px;
  color: var(--color-ink-mute);
  padding-top: 8px;
}

.rule-list {
  margin-bottom: 40px;
}

.rule-list h2,
.faq-section h2 {
  font-size: 22px;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.rule-group {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 14px;
}

.rule-group h3 {
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.rule-group ul {
  padding-left: 0;
}

.rule-group ul li {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin-bottom: 6px;
  padding-left: 16px;
  position: relative;
}

.rule-group ul li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--color-blue);
  font-weight: 700;
}

.rule-group ul li strong {
  color: var(--color-ink);
  font-weight: 600;
}

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

.faq-section .faq-item {
  max-width: 720px;
}

/* ==========================================================================
   404 页面
   ========================================================================== */

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

.error-section {
  text-align: center;
  max-width: 560px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-blue);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 28px;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.error-lead {
  font-size: 16px;
  color: var(--color-ink-soft);
  margin-bottom: 28px;
}

.error-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.error-hint {
  font-size: 14px;
  color: var(--color-ink-mute);
}

/* ==========================================================================
   Responsive — 960px 与 640px 断点
   ========================================================================== */

@media (max-width: 960px) {
  /* 页头：显示汉堡，收起导航 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 4px 12px rgba(31, 35, 40, 0.08);
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 20px;
    gap: 2px;
  }

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

  .nav-list li a {
    padding: 12px 14px;
    font-size: 16px;
  }

  .btn-post-guide {
    display: none;
  }

  /* 页脚改为两列 */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-about {
    grid-column: 1 / -1;
  }

  /* 首页版块与步骤改两列 */
  .board-stalls {
    grid-template-columns: repeat(2, 1fr);
  }

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

  /* 内页侧栏布局改为正文优先 */
  .page-layout,
  .sidebar-left,
  .archive-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-left .sidebar-index,
  .sidebar-left .season-index,
  .sidebar-left .content-index,
  .archive-layout .season-index {
    position: static;
  }

  .sidebar-left .entry-groups,
  .sidebar-left .month-groups,
  .sidebar-left .content-area {
    order: 1;
  }

  .sidebar-left .sidebar-index,
  .sidebar-left .season-index,
  .sidebar-left .content-index {
    order: 2;
  }

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

  .season-months {
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

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

  .brand-slogan {
    display: none;
  }

  .inner-main {
    padding: 0 16px 48px;
  }

  .page-header {
    padding: 20px 0 16px;
    margin-bottom: 24px;
  }

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

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

  .breadcrumb {
    padding-top: 16px;
    font-size: 13px;
    flex-wrap: wrap;
  }

  /* 首页 */
  .hero-text {
    padding: 48px 0 40px;
  }

  .hero-inner {
    padding: 0 16px;
  }

  .hero-text h1 {
    font-size: 28px;
  }

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

  .hero-actions {
    flex-direction: column;
    gap: 10px;
  }

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

  .content-media-primary img {
    height: 200px;
    border-radius: var(--radius-md);
  }

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

  .board-index .section-heading,
  .open-questions .section-heading,
  .guide .section-heading {
    padding-left: 16px;
    padding-right: 16px;
  }

  .board-stalls {
    grid-template-columns: 1fr;
    padding-left: 16px;
    padding-right: 16px;
    gap: 14px;
  }

  .featured-topic,
  .season-preview,
  .rule-summary,
  .home-main .related-links {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .topic-thumb img {
    width: 100%;
    height: 160px;
  }

  .question-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 16px;
  }

  .question-category {
    margin-bottom: 0;
  }

  .season-card {
    padding: 20px;
  }

  .season-months {
    flex-direction: column;
    gap: 8px;
  }

  .month-link {
    width: 100%;
  }

  .guide-steps {
    grid-template-columns: 1fr;
    padding-left: 16px;
    padding-right: 16px;
    gap: 14px;
  }

  .guide-step {
    padding: 20px;
  }

  .guide .btn-text {
    margin-left: 16px;
    margin-right: 16px;
  }

  .rule-faq {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .footer-about {
    grid-column: auto;
  }

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

  /* 内页模块 */
  .fit-list,
  .tips-list,
  .question-group,
  .structure-grid,
  .entry-grid,
  .spoiler-compare {
    grid-template-columns: 1fr;
  }

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

  .board-table-wrap {
    border-radius: var(--radius-md);
  }

  .board-table-wrap table {
    min-width: 560px;
  }

  .question-format {
    padding: 20px;
  }

  .format-example {
    padding: 14px 16px;
  }

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

  .post-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .post-desc {
    min-width: 0;
  }

  .status-legend {
    padding: 20px;
  }

  .structure-item,
  .entry-card,
  .fit-item,
  .tip-item,
  .question-card {
    padding: 16px;
  }

  .step-card {
    padding: 20px;
  }

  .rule-group {
    padding: 16px 18px;
  }

  .spoiler-compare {
    gap: 12px;
  }

  .spoiler-ok,
  .spoiler-bad {
    padding: 16px;
  }

  .error-code {
    font-size: 56px;
  }

  .error-section h1 {
    font-size: 24px;
  }

  .error-actions {
    flex-direction: column;
    gap: 10px;
  }

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