/* =========================================================
   海角社区 - 全站样式表
   工艺品牌风 · 编号系统 · 细线分隔
   ========================================================= */

/* ---------------------------------------------
   Base
   --------------------------------------------- */
:root {
  --color-bg: #F5F1E8;
  --color-brown: #8B5A2B;
  --color-ink: #2F3E46;
  --color-accent: #D98E32;
  --color-card: #E9E3D5;
  --color-line: #D8D0C0;
  --color-white: #FFFFFF;
  --color-muted: #6B6A63;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --shell-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-soft: 0 1px 3px rgba(47, 62, 70, 0.08);
  --shadow-hover: 0 2px 8px rgba(47, 62, 70, 0.12);
}

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

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

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-ink);
}

h1 {
  font-size: 2rem;
  letter-spacing: 0.02em;
}

h2 {
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

h3 {
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

p {
  line-height: 1.75;
}

ul, ol {
  list-style-position: inside;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* ---------------------------------------------
   Layout：页头 / 页脚 / 主容器
   --------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-line);
  position: relative;
  z-index: 100;
}

.header-shell {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  flex-shrink: 0;
}

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

.brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-brown);
  letter-spacing: 0.04em;
}

.brand-slogan {
  font-size: 0.75rem;
  color: var(--color-muted);
  letter-spacing: 0.08em;
  margin-top: 1px;
}

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

.nav-list {
  list-style: none;
  display: flex;
  gap: 4px;
}

.nav-list li {
  position: relative;
}

.nav-list a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.95rem;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list a:hover {
  background-color: rgba(139, 90, 43, 0.08);
  color: var(--color-brown);
  text-decoration: none;
}

.nav-list a.is-current {
  background-color: var(--color-brown);
  color: var(--color-white);
}

.nav-list a.is-current:hover {
  color: var(--color-white);
  background-color: var(--color-brown);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  min-width: 44px;
}

.nav-toggle-icon {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--color-ink);
  position: relative;
  transition: background-color 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: var(--color-ink);
  transition: transform 0.2s ease;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.nav-toggle-text {
  font-size: 0.85rem;
  color: var(--color-ink);
}

.site-footer {
  background-color: var(--color-ink);
  color: #C9CFD2;
  margin-top: auto;
}

.footer-shell {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}

.footer-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-about > p:last-child {
  font-size: 0.9rem;
  color: #AEB6BA;
  line-height: 1.7;
}

.footer-title {
  font-size: 1rem;
  color: var(--color-white);
  margin-bottom: 14px;
  font-weight: 600;
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: #AEB6BA;
  font-size: 0.9rem;
  display: inline-block;
  padding: 2px 0;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 0.8rem;
  color: #8E979B;
}

/* 内页骨架 */
.inner-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 24px 24px 56px;
  width: 100%;
  flex: 1 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  margin-bottom: 20px;
  color: var(--color-muted);
}

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

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

.breadcrumb-sep {
  color: #B0A89A;
}

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

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

.page-title {
  font-size: 1.9rem;
  margin-bottom: 10px;
  color: var(--color-ink);
}

.page-description {
  max-width: 760px;
  font-size: 1rem;
  color: var(--color-muted);
}

/* ---------------------------------------------
   Components：通用组件
   --------------------------------------------- */
.section-heading {
  margin-bottom: 16px;
}

.section-heading h2 {
  margin-bottom: 4px;
}

.section-heading p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.section-title {
  font-size: 1.3rem;
  margin-bottom: 6px;
  color: var(--color-ink);
}

.section-desc {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.section-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

/* 编号系统 */
.board-index,
.step-num,
.ranking-no,
.task-index {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-weight: 600;
}

/* 按钮 */
.hero-cta,
.guide-cta,
.more-link,
.card-link,
.board-entry,
.entry-btn,
.btn-link,
.path-link,
.btn-primary {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-brown);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid var(--color-brown);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.hero-cta:hover,
.guide-cta:hover,
.more-link:hover,
.card-link:hover,
.board-entry:hover,
.entry-btn:hover,
.btn-link:hover,
.path-link:hover,
.btn-primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
  text-decoration: none;
}

/* 文本链接按钮变体 */
.text-link {
  color: var(--color-brown);
  border-bottom: 1px solid var(--color-brown);
  padding-bottom: 2px;
}

.text-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  text-decoration: none;
}

/* 图片与图片容器 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

figcaption {
  font-size: 0.8rem;
  color: var(--color-muted);
  padding: 8px 2px 0;
  line-height: 1.5;
}

/* 表格基础 */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

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

th {
  font-weight: 600;
  background-color: var(--color-card);
  color: var(--color-ink);
}

tr:last-child td {
  border-bottom: none;
}

/* details 基础（FAQ） */
details.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  padding: 14px 18px;
}

details.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  position: relative;
  padding-right: 30px;
  font-size: 1rem;
  line-height: 1.5;
}

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

details.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 0;
  font-size: 1.2rem;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

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

details.faq-item .faq-answer {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--color-line);
  color: var(--color-muted);
  font-size: 0.95rem;
}

details.faq-item .faq-answer p {
  margin-bottom: 8px;
}

details.faq-item .faq-answer p:last-child {
  margin-bottom: 0;
}

/* ---------------------------------------------
   Components：首页专属
   --------------------------------------------- */
.home-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 24px 24px 56px;
  width: 100%;
  flex: 1 0 auto;
}

/* 首屏主视觉 */
.hero-visual {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero-copy h1 {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.hero-text {
  color: var(--color-muted);
  margin-bottom: 22px;
  max-width: 540px;
}

.hero-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 公告栏 */
.notice-bar {
  background-color: var(--color-card);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.notice-bar p {
  color: var(--color-ink);
  line-height: 1.6;
}

.notice-bar strong {
  color: var(--color-brown);
}

/* 版块总览 */
.boards-overview {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

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

.board-card {
  background-color: var(--color-card);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 18px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.board-card:hover {
  border-color: var(--color-brown);
  box-shadow: var(--shadow-hover);
}

.board-card-top {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.board-index {
  font-size: 0.8rem;
}

.board-card h3 {
  font-size: 1.05rem;
}

.board-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.card-link {
  padding: 6px 14px;
  font-size: 0.85rem;
  background-color: transparent;
  border-color: var(--color-brown);
  color: var(--color-brown);
}

.card-link:hover {
  background-color: var(--color-brown);
  color: var(--color-white);
}

/* 首页双栏区 */
.home-columns {
  display: grid;
  grid-template-columns: 8fr 4fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 24px;
}

.hot-list-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.hot-list {
  list-style: none;
  margin-bottom: 16px;
}

.hot-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 4px;
  border-bottom: 1px dashed var(--color-line);
  transition: border-color 0.2s ease;
}

.hot-item:hover {
  border-bottom-color: var(--color-brown);
}

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

.hot-board {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  background-color: rgba(217, 142, 50, 0.1);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  white-space: nowrap;
  flex-shrink: 0;
}

.hot-link {
  flex: 1;
  color: var(--color-ink);
  font-size: 0.95rem;
  line-height: 1.5;
}

.hot-link:hover {
  color: var(--color-brown);
  text-decoration: underline;
}

.hot-meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.more-link {
  padding: 8px 18px;
  font-size: 0.9rem;
  background-color: transparent;
  border: 1px solid var(--color-line);
  color: var(--color-ink);
}

.more-link:hover {
  background-color: var(--color-brown);
  border-color: var(--color-brown);
  color: var(--color-white);
}

/* 右侧参与面板 */
.join-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.join-panel h2 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.join-panel > p {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.join-links {
  list-style: none;
  margin-bottom: 16px;
}

.join-links li {
  margin-bottom: 6px;
}

.join-links a {
  display: block;
  padding: 8px 10px;
  border-left: 3px solid transparent;
  color: var(--color-ink);
  font-size: 0.95rem;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.join-links a:hover {
  border-left-color: var(--color-accent);
  color: var(--color-brown);
  text-decoration: none;
}

.aside-figure img {
  height: 180px;
  object-fit: cover;
}

/* 版块字段说明表 */
.structure-table-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.structure-table th,
.structure-table td {
  min-width: 200px;
}

.table-footnote {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--color-muted);
  font-style: italic;
}

/* 新手指南摘要 */
.guide-summary {
  background-color: var(--color-ink);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
}

.guide-text h2 {
  color: var(--color-white);
  margin-bottom: 10px;
}

.guide-text p {
  color: #AEB6BA;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.guide-cta {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.guide-cta:hover {
  background-color: var(--color-brown);
  border-color: var(--color-brown);
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step-card {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 16px;
}

.step-card .step-num {
  font-size: 0.8rem;
  display: block;
  margin-bottom: 4px;
}

.step-card h3 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 4px;
}

.step-card p {
  color: #AEB6BA;
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ---------------------------------------------
   Components：版块总览页 boards.html
   --------------------------------------------- */
.category-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.category-row {
  display: contents;
}

.category-cell {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 18px;
  border: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.category-cell:hover {
  border-color: var(--color-brown);
}

.category-name {
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--color-ink);
}

.category-note {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
}

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

.board-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.board-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  background-color: rgba(217, 142, 50, 0.12);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
}

.board-name {
  font-size: 1.05rem;
}

.board-cat {
  font-size: 0.75rem;
  color: var(--color-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  margin-left: auto;
}

.board-desc {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 10px;
  line-height: 1.6;
}

.board-form {
  font-size: 0.82rem;
  color: var(--color-brown);
  margin-bottom: 12px;
  padding: 6px 10px;
  background-color: rgba(139, 90, 43, 0.06);
  border-radius: var(--radius-sm);
  display: inline-block;
}

.board-entry {
  padding: 6px 14px;
  font-size: 0.85rem;
  background-color: transparent;
  border-color: var(--color-brown);
  color: var(--color-brown);
}

.board-entry:hover {
  background-color: var(--color-brown);
  color: var(--color-white);
}

.activity-table th,
.activity-table td {
  min-width: 140px;
}

.board-figure {
  margin: 24px 0;
}

.board-figure img {
  height: 260px;
  object-fit: cover;
}

.glossary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.glossary-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.glossary-item dt {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-brown);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.glossary-item dd {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin-left: 0;
  line-height: 1.7;
}

.section-help {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 24px;
}

.help-content p {
  color: var(--color-muted);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.help-content a {
  margin-right: 12px;
}

/* ---------------------------------------------
   Components：热门话题页 hot.html
   --------------------------------------------- */
.topic-filter {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.topic-filter .section-title {
  margin-bottom: 12px;
}

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

.filter-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-right: 4px;
}

.filter-tag {
  background-color: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 6px 16px;
  font-size: 0.9rem;
  color: var(--color-ink);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  min-height: 36px;
}

.filter-tag:hover {
  border-color: var(--color-brown);
  color: var(--color-brown);
}

.filter-tag.is-active {
  background-color: var(--color-brown);
  border-color: var(--color-brown);
  color: var(--color-white);
}

.hot-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 24px;
}

.topic-ranking,
.recent-posts {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.ranking-list {
  list-style: none;
}

.ranking-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--color-line);
}

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

.ranking-no {
  font-size: 1.1rem;
  min-width: 32px;
  text-align: center;
  line-height: 1.5;
}

.ranking-content {
  flex: 1;
}

.ranking-content h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.ranking-content p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 4px;
  line-height: 1.6;
}

.topic-board {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  background-color: rgba(217, 142, 50, 0.1);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
}

.recent-posts .post-row {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--color-line);
}

.recent-posts .post-row:last-child {
  border-bottom: none;
}

.post-media {
  flex-shrink: 0;
  width: 120px;
}

.post-img {
  width: 120px;
  height: 84px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.post-info {
  flex: 1;
  min-width: 0;
}

.post-info h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  line-height: 1.5;
}

.post-meta {
  margin-bottom: 4px;
}

.post-board-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  background-color: rgba(217, 142, 50, 0.1);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
}

.post-info > p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}

.post-link {
  font-size: 0.85rem;
  color: var(--color-brown);
  border-bottom: 1px solid var(--color-brown);
  padding-bottom: 1px;
}

.post-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  text-decoration: none;
}

.more-boards-entry {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.more-boards-entry p {
  color: var(--color-muted);
  margin-bottom: 16px;
}

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

.entry-btn {
  background-color: transparent;
  border-color: var(--color-brown);
  color: var(--color-brown);
}

.entry-btn:hover {
  background-color: var(--color-brown);
  color: var(--color-white);
}

.join-hint {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: left;
}

.join-hint p {
  color: var(--color-muted);
  margin-bottom: 10px;
}

/* ---------------------------------------------
   Components：新手指南页 guide.html
   --------------------------------------------- */
.guide-path {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.guide-path .section-title {
  margin-bottom: 6px;
}

.guide-path > p {
  color: var(--color-muted);
  margin-bottom: 20px;
}

.path-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.path-steps li {
  background-color: var(--color-card);
  border-radius: var(--radius-sm);
  padding: 10px 6px;
  text-align: center;
  font-size: 0.8rem;
  border: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.path-steps li:hover {
  border-color: var(--color-brown);
}

.path-steps .step-num {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.guide-figure img {
  height: 260px;
  object-fit: cover;
}

.guide-tasks {
  margin-bottom: 24px;
}

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

.task-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  margin-bottom: 12px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.task-card:hover {
  border-color: var(--color-brown);
  box-shadow: var(--shadow-hover);
}

.task-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.task-index {
  font-size: 0.9rem;
  min-width: 28px;
  text-align: center;
  background-color: rgba(217, 142, 50, 0.12);
  border-radius: var(--radius-sm);
  padding: 2px 4px;
}

.task-card p {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin-bottom: 8px;
  line-height: 1.7;
}

.task-card a {
  font-size: 0.88rem;
  color: var(--color-brown);
  border-bottom: 1px solid var(--color-brown);
  padding-bottom: 1px;
}

.task-card a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  text-decoration: none;
}

.guide-questions {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.guide-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.next-card h2 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.next-card p {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.btn-link {
  background-color: transparent;
  border: 1px solid var(--color-brown);
  color: var(--color-brown);
  font-size: 0.88rem;
  padding: 6px 14px;
}

.btn-link:hover {
  background-color: var(--color-brown);
  color: var(--color-white);
}

/* ---------------------------------------------
   Components：常见问题页 faq.html
   --------------------------------------------- */
.layout-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}

.sidebar-left .faq-cat-sidebar {
  order: 1;
}

.sidebar-left .faq-content-area {
  order: 2;
}

.faq-cat-sidebar {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: sticky;
  top: 20px;
}

.sidebar-title {
  font-size: 1.05rem;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.cat-list {
  list-style: none;
  margin-bottom: 16px;
}

.cat-list li {
  margin-bottom: 4px;
}

.cat-list a {
  display: block;
  padding: 8px 10px;
  border-left: 3px solid transparent;
  color: var(--color-ink);
  font-size: 0.92rem;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.cat-list a:hover {
  border-left-color: var(--color-accent);
  color: var(--color-brown);
  text-decoration: none;
}

.faq-figure img {
  height: 140px;
  object-fit: cover;
}

.faq-content-area {
  min-width: 0;
}

.faq-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.faq-section .section-heading {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.faq-list {
  margin-top: 14px;
}

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

.status-content p {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-bottom: 10px;
  line-height: 1.7;
}

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

.feedback-path-bar {
  background-color: var(--color-ink);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.path-content p {
  color: #AEB6BA;
  font-size: 0.95rem;
}

.path-content strong {
  color: var(--color-white);
}

.path-link {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  padding: 8px 18px;
  font-size: 0.9rem;
  white-space: nowrap;
}

.path-link:hover {
  background-color: var(--color-brown);
  border-color: var(--color-brown);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 12px 0;
  font-size: 0.9rem;
}

.related-links-label {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin-right: 4px;
}

.related-links-item {
  color: var(--color-brown);
  border-bottom: 1px solid var(--color-brown);
  padding-bottom: 1px;
  font-size: 0.88rem;
}

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

/* ---------------------------------------------
   Components：站务反馈页 feedback.html
   --------------------------------------------- */
.feedback-intro,
.feedback-process,
.feedback-info,
.feedback-checklist {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.feedback-intro h2,
.feedback-process h2,
.feedback-info h2,
.feedback-checklist h2 {
  margin-bottom: 12px;
}

.feedback-intro > p,
.feedback-process > p,
.feedback-info > p,
.feedback-checklist > p {
  color: var(--color-muted);
  margin-bottom: 16px;
}

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

.type-card {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 18px;
  border: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.type-card:hover {
  border-color: var(--color-brown);
}

.type-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.type-card p {
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 0;
}

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

.process-item {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 18px;
}

.process-item h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.process-item ol {
  padding-left: 18px;
  list-style-position: outside;
}

.process-item li {
  font-size: 0.88rem;
  color: var(--color-muted);
  margin-bottom: 6px;
  line-height: 1.6;
}

.info-list {
  list-style: none;
}

.info-list li {
  padding: 8px 0 8px 24px;
  position: relative;
  font-size: 0.95rem;
  color: var(--color-ink);
  border-bottom: 1px dashed var(--color-line);
}

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

.info-list li::before {
  content: "›";
  position: absolute;
  left: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 700;
}

.feedback-media img {
  height: 240px;
  object-fit: cover;
}

.feedback-media figcaption {
  text-align: center;
}

.checklist {
  list-style: none;
}

.checklist li {
  padding: 6px 0 6px 28px;
  position: relative;
  font-size: 0.92rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.checklist li::before {
  content: "▢";
  position: absolute;
  left: 4px;
  color: var(--color-brown);
  font-size: 1rem;
}

.feedback-related {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-top: 20px;
}

.feedback-related p {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin-bottom: 10px;
}

.feedback-related a {
  display: inline-block;
  margin-right: 16px;
  color: var(--color-brown);
  border-bottom: 1px solid var(--color-brown);
  padding-bottom: 1px;
  font-size: 0.9rem;
}

.feedback-related a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  text-decoration: none;
}

/* ---------------------------------------------
   Components：404 页面
   --------------------------------------------- */
.error-main {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
}

.error-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  max-width: 640px;
  width: 100%;
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 4rem;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 12px;
  font-weight: 700;
}

.error-panel h1 {
  margin-bottom: 12px;
}

.error-desc {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 24px;
}

.btn-primary {
  background-color: var(--color-brown);
  color: var(--color-white);
  padding: 10px 22px;
}

.error-actions a:not(.btn-primary) {
  display: inline-block;
  padding: 10px 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-size: 0.95rem;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.error-actions a:not(.btn-primary):hover {
  border-color: var(--color-brown);
  color: var(--color-brown);
  text-decoration: none;
}

.error-help {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.error-help a {
  color: var(--color-brown);
  border-bottom: 1px solid var(--color-brown);
  padding-bottom: 1px;
  margin: 0 6px;
}

.error-help a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  text-decoration: none;
}

/* ---------------------------------------------
   Responsive：≤ 1024px
   --------------------------------------------- */
@media (max-width: 1024px) {
  .board-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .path-steps {
    grid-template-columns: repeat(4, 1fr);
  }

  .path-steps li:nth-child(n+5) {
    margin-top: 8px;
  }

  .hot-layout {
    grid-template-columns: 1fr;
  }

  .hot-layout .topic-ranking {
    order: 2;
  }

  .hot-layout .recent-posts {
    order: 1;
  }

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

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

  .process-item:last-child {
    grid-column: 1 / -1;
  }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------------------------------------------
   Responsive：≤ 768px
   --------------------------------------------- */
@media (max-width: 768px) {
  .header-shell {
    flex-wrap: wrap;
    padding: 12px 16px;
    min-height: 60px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-nav {
    width: 100%;
    margin-left: 0;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    background-color: var(--color-white);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    margin-top: 8px;
    padding: 8px;
  }

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

  .nav-list a {
    display: block;
    padding: 12px 14px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  /* 首页 */
  .hero-visual {
    grid-template-columns: 1fr;
    padding: 24px;
    gap: 20px;
  }

  .hero-copy h1 {
    font-size: 1.8rem;
  }

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

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

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

  .home-columns .join-panel {
    order: -1;
  }

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

  /* 内页 */
  .inner-main {
    padding: 20px 16px 40px;
  }

  .page-title {
    font-size: 1.6rem;
  }

  /* boards */
  .category-table {
    grid-template-columns: 1fr;
  }

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

  /* faq */
  .layout-shell {
    grid-template-columns: 1fr;
  }

  .faq-cat-sidebar {
    position: static;
    order: 2;
  }

  .faq-content-area {
    order: 1;
  }

  .faq-figure {
    display: none;
  }

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

  .path-steps li:nth-child(n+4) {
    margin-top: 8px;
  }

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

  /* feedback */
  .feedback-type-grid {
    grid-template-columns: 1fr;
  }

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

  .process-item:last-child {
    grid-column: auto;
  }

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

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

/* ---------------------------------------------
   Responsive：≤ 480px
   --------------------------------------------- */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .brand-name {
    font-size: 1.2rem;
  }

  .brand-slogan {
    font-size: 0.7rem;
  }

  .header-shell {
    padding: 10px 14px;
    gap: 10px;
  }

  .nav-toggle-text {
    display: none;
  }

  .nav-toggle {
    padding: 8px 10px;
    min-height: 44px;
    min-width: 44px;
    justify-content: center;
  }

  .inner-main,
  .home-main {
    padding: 16px 12px 32px;
  }

  .page-header {
    margin-bottom: 20px;
  }

  .page-title {
    font-size: 1.4rem;
  }

  .hero-visual {
    padding: 18px;
  }

  .hero-copy h1 {
    font-size: 1.5rem;
  }

  .hero-figure img {
    height: 170px;
  }

  .notice-bar {
    padding: 12px 14px;
  }

  .section-panel {
    padding: 18px;
  }

  .board-card {
    padding: 14px;
  }

  .board-card-header {
    flex-wrap: wrap;
  }

  .board-cat {
    margin-left: 0;
  }

  .hot-item {
    flex-wrap: wrap;
    gap: 6px;
  }

  .hot-meta {
    margin-left: auto;
  }

  .post-row {
    flex-direction: column;
  }

  .post-media {
    width: 100%;
  }

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

  .ranking-item {
    gap: 10px;
  }

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

  .path-steps li:nth-child(n+3) {
    margin-top: 8px;
  }

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

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

  .entry-btn {
    text-align: center;
  }

  .error-panel {
    padding: 32px 20px;
  }

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

  .footer-shell {
    padding: 24px 14px 20px;
  }

  .activity-table {
    overflow-x: auto;
    display: block;
  }

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