/* ============================================================
   天堂漫画 · 全站样式表
   版本：1.0
   说明：覆盖整站真实 DOM 的全部样式，按 base / layout /
         components / pages / responsive 分组组织。
   ============================================================ */

/* ============================================================
   1. Base —— 全局基础
   ============================================================ */

:root {
  --color-ink: #1e2633;
  --color-bg: #f6f8fb;
  --color-card: #ffffff;
  --color-accent: #f0643a;
  --color-teal: #2d8a7d;
  --color-border: #d7dee8;
  --color-text-secondary: #5a6b7f;
  --color-text-muted: #8a97a8;
  --color-text-on-dark: #f0f4f9;

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

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-card: 0 1px 3px rgba(30, 38, 51, 0.06);
  --shadow-hover: 0 4px 12px rgba(30, 38, 51, 0.08);

  --container-width: 1200px;
  --header-height: 64px;
  --space-section: 48px;
  --space-block: 24px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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-accent);
}

ul,
ol {
  list-style: none;
}

strong {
  font-weight: 600;
}

h1,
h2,
h3,
h4 {
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-ink);
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 17px;
}

/* 统一容器宽度 */
.site-header,
.site-main,
.site-footer {
  width: 100%;
}

.header-inner,
.site-main > *,
.footer-main,
.footer-bottom {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 隐藏无障碍辅助说明 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   2. Layout —— 布局骨架
   ============================================================ */

/* 页头 */
.site-header {
  background-color: var(--color-card);
  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: var(--header-height);
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--color-accent);
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
}

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

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

.nav-list li a.is-current::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

/* 汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  margin-top: 48px;
}

.footer-main {
  padding-top: 40px;
  padding-bottom: 24px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-bottom: 16px;
}

.footer-nav a {
  font-size: 14px;
  color: var(--color-text-secondary);
}

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

.footer-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.footer-bottom {
  padding-top: 16px;
  padding-bottom: 20px;
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* 内页统一骨架 */
.inner-main {
  padding-top: 24px;
  padding-bottom: 48px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 720px;
}

/* 双栏布局（fenlei / gengxin） */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

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

.layout-aside {
  min-width: 0;
}

/* 双栏布局（yuedu 侧栏在右） */
.layout-shell.sidebar-right {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

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

.sidebar {
  min-width: 0;
}

/* ============================================================
   3. Components —— 通用组件
   ============================================================ */

/* 区块标题 */
.section-head {
  margin-bottom: 24px;
}

.section-head h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
}

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

.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.section-intro {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

/* 状态标签 */
.status-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--color-accent);
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

/* 通用标签 */
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 2px 10px;
  border-radius: 999px;
}

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  text-align: center;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

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

.btn-primary:hover {
  background-color: #d8542d;
  color: #ffffff;
  box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 文本链接 */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

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

/* 卡片网格 */
.card-grid {
  display: grid;
  gap: 16px;
}

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

.card-grid.three-col {
  grid-template-columns: repeat(3, 1fr);
}

/* 提示卡片 */
.tip-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.tip-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

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

/* 图片容器 */
figure {
  margin: 0;
}

.hero-figure,
.preview-media figure,
.media-figure,
.log-cover,
.about-visual-figure,
.topic-figure {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.hero-figure img,
.preview-media img,
.media-figure img,
.log-cover img,
.about-visual-figure img,
.topic-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 支持带（页脚前入口） */
.support-band {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.support-card {
  display: block;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.support-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.support-card-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.support-card:hover .support-card-title {
  color: var(--color-accent);
}

.support-card-desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.support-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.support-desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* 侧栏通用 */
.aside-block {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.aside-block + .aside-block {
  margin-top: 16px;
}

.aside-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

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

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

/* 侧栏卡片（yuedu） */
.sidebar-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.sidebar-card h2 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.checklist li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  padding-left: 20px;
  position: relative;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border: 1px solid var(--color-teal);
  border-radius: 2px;
  background-color: var(--color-card);
}

.checklist-note {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 侧栏链接 */
.sidebar-links,
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.sidebar-link,
.aside-links a {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  padding: 10px 16px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.sidebar-link:hover,
.aside-links a:hover {
  border-color: var(--color-accent);
  background-color: var(--color-card);
}

/* 侧栏入口卡（fenlei） */
.aside-link {
  display: block;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.aside-link:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.aside-link + .aside-link {
  margin-top: 12px;
}

/* ============================================================
   4. Pages —— 页面专属模块
   ============================================================ */

/* ---------- 首页 ---------- */

/* 首屏：当前更新状态 */
.hero-current {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding-top: 48px;
  padding-bottom: 48px;
}

.hero-text h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 480px;
}

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

.hero-visual {
  min-width: 0;
}

.hero-figure {
  width: 100%;
  aspect-ratio: 4 / 3;
  margin-bottom: 16px;
  border: 1px solid var(--color-border);
}

.current-status-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.current-status-card .status-tag {
  margin-bottom: 10px;
}

.status-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.status-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.current-status-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.current-status-card a:hover {
  text-decoration: underline;
}

/* 题材功能目录 */
.topic-directory {
  padding: 48px 0;
}

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

.topic-card {
  display: block;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.topic-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.topic-card:hover h3 {
  color: var(--color-accent);
}

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

/* 热度参考 */
.hot-reference {
  padding: 48px 0;
}

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

.hot-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.hot-list li:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.hot-rank {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-border);
  flex-shrink: 0;
  min-width: 32px;
  text-align: center;
}

.hot-item {
  flex: 1;
  min-width: 0;
}

.hot-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 4px;
}

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

.hot-list li > a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  flex-shrink: 0;
}

.hot-list li > a:hover {
  text-decoration: underline;
}

/* 更新日程时间轴 */
.update-timeline {
  padding: 48px 0;
}

.timeline-current {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  margin-bottom: 24px;
}

.timeline-current .status-tag {
  flex-shrink: 0;
  margin-top: 4px;
}

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

.timeline-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.timeline-item .tag {
  margin-bottom: 6px;
}

.timeline-item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.timeline-item a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.timeline-item a:hover {
  text-decoration: underline;
}

.timeline-list {
  position: relative;
  padding-left: 24px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background-color: var(--color-border);
  border-radius: 1px;
}

.timeline-list li {
  position: relative;
  padding-bottom: 24px;
}

.timeline-list li:last-child {
  padding-bottom: 0;
}

.timeline-list li::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 8px;
  width: 12px;
  height: 12px;
  background-color: var(--color-card);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}

/* 阅读界面预览 */
.interface-preview {
  padding: 48px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.preview-media {
  min-width: 0;
}

.preview-media figure {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--color-border);
}

.preview-content h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.preview-content .section-sub {
  margin-bottom: 20px;
}

.preview-notes {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.preview-notes li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  padding-left: 20px;
  position: relative;
}

.preview-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.preview-notes strong {
  color: var(--color-ink);
  font-weight: 600;
}

/* 开始指南 */
.start-guide {
  padding: 48px 0;
}

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

.guide-step {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.guide-step:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  background-color: var(--color-accent);
  border-radius: 50%;
  margin-bottom: 14px;
}

.guide-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

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

.guide-step a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.guide-step a:hover {
  text-decoration: underline;
}

/* ---------- 题材总览页 ---------- */

/* 题材卡片（内页版） */
.topic-group .topic-card {
  padding: 0;
  overflow: hidden;
}

.topic-group .topic-card .topic-figure {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border-bottom: 1px solid var(--color-border);
}

.topic-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.topic-tagline {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.topic-fit,
.topic-point {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.topic-fit::before {
  content: "适合人群：";
  font-weight: 600;
  color: var(--color-ink);
}

.topic-point::before {
  content: "常见看点：";
  font-weight: 600;
  color: var(--color-ink);
}

.topic-links {
  display: flex;
  gap: 16px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}

.topic-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
}

.topic-links a:hover {
  text-decoration: underline;
}

/* 题材选择建议 */
.topic-tips {
  margin-top: 40px;
}

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

.tip-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-card);
}

.tip-label {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--color-teal);
  padding: 4px 10px;
  border-radius: 999px;
  margin-top: 2px;
}

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

/* ---------- 阅读指南页 ---------- */

/* 步骤导航 */
.step-nav {
  margin-bottom: 32px;
}

.step-nav ol {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.step-nav li {
  flex: 1;
  min-width: 120px;
}

.step-nav a {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  text-align: center;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.step-nav a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 阅读区块 */
.read-section {
  margin-bottom: 40px;
}

.read-section > h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.read-section .section-intro {
  margin-bottom: 20px;
}

/* 分镜示意图 */
.media-figure {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.media-figure figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 0 0;
  text-align: center;
}

/* ---------- 更新动态页 ---------- */

.log-visual {
  margin-bottom: 32px;
}

.log-cover {
  aspect-ratio: 21 / 9;
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.log-cover figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 0 0;
  text-align: center;
}

.log-visual .section-title {
  margin-top: 16px;
}

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

/* 日志区块 */
.log-section {
  margin-bottom: 32px;
}

.log-section .section-title {
  font-size: 20px;
  margin-bottom: 16px;
}

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

.log-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
}

.log-item-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.log-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.tag-new {
  color: #1d6b62;
  background-color: #e0f0ee;
}

.tag-adjust {
  color: #a04a2a;
  background-color: #fdeae3;
}

.tag-fix {
  color: #4a5a7a;
  background-color: #e8edf5;
}

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

/* 跟进方式侧栏 */
.aside-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.follow-block {
  margin-bottom: 16px;
}

.follow-block h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

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

/* ---------- 站点说明页 ---------- */

.about-visual {
  margin-bottom: 32px;
}

.about-visual-figure {
  aspect-ratio: 21 / 9;
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.about-visual-figure figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 0 0;
  text-align: center;
}

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

.about-visual > p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

/* 定位说明 */
.positioning {
  margin-bottom: 40px;
}

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

.positioning-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.positioning-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.positioning-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.positioning-item p:last-child {
  margin-bottom: 0;
}

/* 内容边界清单 */
.boundary-list {
  margin-bottom: 40px;
}

.boundary-items {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundary-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}

.boundary-label {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 2px 10px;
  border-radius: 999px;
}

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

/* FAQ 折叠区 */
.faq {
  margin-bottom: 40px;
}

.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-item summary {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.25s ease;
}

.faq-item[open] summary {
  color: var(--color-accent);
}

.faq-item[open] summary::after {
  transform: translateY(-30%) rotate(225deg);
}

.faq-item summary:hover {
  color: var(--color-accent);
}

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

/* ---------- 404 页面 ---------- */

.error-main {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
}

.error-panel {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 12px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 10px;
}

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

.error-home {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--color-accent);
  padding: 10px 28px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  transition: background-color 0.2s ease;
}

.error-home:hover {
  background-color: #d8542d;
  color: #ffffff;
}

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

.error-help a {
  color: var(--color-accent);
  font-weight: 500;
  margin: 0 6px;
}

.error-help a:hover {
  text-decoration: underline;
}

/* ============================================================
   5. Responsive —— 响应式
   ============================================================ */

/* 平板及以下 */
@media (max-width: 1024px) {
  .hero-current {
    gap: 24px;
  }

  .interface-preview {
    gap: 24px;
  }

  .page-layout,
  .layout-shell.sidebar-right {
    grid-template-columns: 1fr;
  }

  .layout-aside,
  .sidebar,
  .sidebar-area {
    margin-top: 24px;
  }
}

/* 手机端 */
@media (max-width: 960px) {
  .header-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-main > *,
  .footer-main,
  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

  .support-band {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 汉堡菜单 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-hover);
  }

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

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

  .nav-list li a {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 16px;
  }

  .nav-list li a.is-current::after {
    display: none;
  }

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

  /* 首页布局 */
  .hero-current {
    grid-template-columns: 1fr;
    padding-top: 32px;
    padding-bottom: 32px;
  }

  .hero-text h1 {
    font-size: 24px;
  }

  .hero-visual {
    order: 2;
  }

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

  .interface-preview {
    grid-template-columns: 1fr;
  }

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

  .support-band {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 内页 */
  .page-title {
    font-size: 24px;
  }

  .card-grid.two-col,
  .card-grid.three-col {
    grid-template-columns: 1fr;
  }

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

  .step-nav ol {
    flex-direction: column;
  }

  .step-nav li {
    min-width: 0;
  }

  /* 404 */
  .error-code {
    font-size: 48px;
  }
}

/* 小屏手机 */
@media (max-width: 560px) {
  .topic-grid {
    grid-template-columns: 1fr;
  }

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

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

  .timeline-current {
    flex-direction: column;
    gap: 8px;
  }

  .hot-list li {
    flex-wrap: wrap;
  }

  .hot-list li > a {
    width: 100%;
    text-align: left;
  }

  .footer-nav {
    flex-direction: column;
    gap: 8px;
  }

  .boundary-item {
    flex-direction: column;
  }

  .boundary-label {
    align-self: flex-start;
  }
}