/* ==========================================================================
   base / 基础变量与全局样式
   ========================================================================== */

:root {
  --paper: #F7F5EF;
  --ink: #1F2928;
  --primary: #0F6B6B;
  --primary-dark: #0A5252;
  --accent: #F2A93B;
  --coral: #E4573D;
  --border: #D8D2C5;
  --white: #FFFFFF;
  --muted: #6B7371;
  --serif: Georgia, "Songti SC", "SimSun", serif;
  --sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --container: 1200px;
  --pad: 24px;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(31, 41, 40, 0.06);
}

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

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

body {
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  line-height: 1.3;
  color: var(--ink);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 0.75rem;
}

.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;
}

/* ==========================================================================
   layout / 全站布局骨架
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background-color: var(--paper);
  border-bottom: 1px solid var(--border);
}

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

.brand-link {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

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

.brand-tagline {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
}

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

.nav-toggle {
  display: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 4px;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--ink);
  margin: 5px 0;
  border-radius: 2px;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  color: var(--ink);
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  background-color: rgba(15, 107, 107, 0.08);
  color: var(--primary);
}

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

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

.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad);
}

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

.site-footer {
  background-color: var(--ink);
  color: rgba(255, 255, 255, 0.85);
  margin-top: 48px;
}

.footer-columns {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px var(--pad) 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col h3 {
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 16px;
  font-family: var(--sans);
  font-weight: 600;
}

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.875rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 20px var(--pad);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.75);
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 8px;
  font-size: 0.8125rem;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  padding: 16px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-description {
  font-size: 1rem;
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 0;
}

/* ==========================================================================
   components / 通用组件
   ========================================================================== */

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background-color: var(--accent);
  border-radius: 2px;
}

.section-block {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.section-block:last-of-type {
  border-bottom: none;
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  text-align: center;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(15, 107, 107, 0.25);
}

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

.btn-secondary:hover {
  background-color: rgba(15, 107, 107, 0.08);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.tag-link {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.8125rem;
  color: var(--primary);
  background-color: rgba(15, 107, 107, 0.08);
  border: 1px solid rgba(15, 107, 107, 0.2);
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tag-link:hover {
  background-color: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* 相关链接条 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  margin-top: 48px;
}

.related-links-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--muted);
}

.related-links-item {
  font-size: 0.875rem;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--primary);
  background-color: rgba(15, 107, 107, 0.05);
}

/* FAQ 手风琴 */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--white);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9375rem;
  position: relative;
  list-style: none;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--primary);
  font-weight: 400;
}

.faq-item[open] summary {
  background-color: rgba(15, 107, 107, 0.04);
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
}

/* ==========================================================================
   components / 首页模块
   ========================================================================== */

/* Hero 焦点区 */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0 64px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-content h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.0625rem;
  color: var(--muted);
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

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

.hero-media {
  display: flex;
  justify-content: center;
}

.hero-figure {
  width: 100%;
  max-width: 520px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--border);
}

/* 核心功能目录 */
.core-features {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(15, 107, 107, 0.1);
  color: var(--primary);
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.feature-item h3 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.feature-item a {
  font-size: 0.8125rem;
  font-weight: 600;
}

/* 频道标签墙 */
.channel-tags {
  padding: 48px 0;
}

.tag-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.tag-group {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.tag-group h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* 视频卡片 */
.video-cards {
  padding: 48px 0;
}

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

.video-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.video-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.card-content {
  padding: 20px;
}

.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--coral);
  font-weight: 600;
  margin-bottom: 8px;
}

.card-content h3 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.card-content p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.card-content a {
  font-size: 0.8125rem;
  font-weight: 600;
}

/* 开始使用三步 */
.start-steps {
  padding: 48px 0;
  background-color: rgba(15, 107, 107, 0.04);
  border-radius: var(--radius);
  margin-bottom: 48px;
}

.start-steps .section-title {
  padding-left: 24px;
  padding-right: 24px;
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 0 24px;
}

.step-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--accent);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.step-item a {
  font-size: 0.8125rem;
  font-weight: 600;
}

/* 入口核验提示条 */
.entry-check-teaser {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--coral);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 48px;
}

.entry-check-teaser h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

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

/* ==========================================================================
   components / 核心业务页
   ========================================================================== */

.rule-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.rule-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.rule-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.rule-item p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
}

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

.category-card {
  display: flex;
  gap: 16px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.category-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.category-card img {
  width: 120px;
  height: 90px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}

.category-info {
  display: flex;
  flex-direction: column;
}

.category-info h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.category-scope {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.category-audience {
  font-size: 0.8125rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.category-info a {
  font-size: 0.8125rem;
  font-weight: 600;
  margin-top: auto;
}

/* 使用示例 */
.example-path {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.path-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.path-steps li {
  background-color: rgba(15, 107, 107, 0.08);
  color: var(--primary);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
}

.example-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: 4px;
}

.example-figure figcaption {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 8px;
}

/* ==========================================================================
   components / 观看指南页
   ========================================================================== */

.step-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.step-by-step .step-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  align-items: start;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.step-media img {
  width: 120px;
  height: 90px;
  object-fit: cover;
  border-radius: 4px;
}

.step-content h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 8px;
}

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

.check-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.check-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.check-item p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
}

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

.prep-block {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.prep-block h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.prep-block p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
}

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

.related-card {
  display: block;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.related-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.related-card p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
}

/* ==========================================================================
   components / 内容参考页
   ========================================================================== */

.page-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

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

.film-list {
  margin-bottom: 48px;
}

.film-card {
  display: flex;
  gap: 20px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.film-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.film-media {
  flex-shrink: 0;
  width: 180px;
}

.film-media figure img {
  width: 180px;
  height: 120px;
  object-fit: cover;
  border-radius: 4px;
}

.film-info {
  display: flex;
  flex-direction: column;
}

.film-info h3 {
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.film-theme {
  font-size: 0.8125rem;
  color: var(--coral);
  font-weight: 600;
  margin-bottom: 8px;
}

.film-info p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.film-info a {
  font-size: 0.8125rem;
  font-weight: 600;
  margin-top: auto;
}

.theme-groups {
  margin-bottom: 48px;
}

.theme-group {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}

.theme-group h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.theme-group ul li {
  padding: 6px 0;
  font-size: 0.875rem;
  color: var(--muted);
  border-bottom: 1px dashed var(--border);
}

.theme-group ul li:last-child {
  border-bottom: none;
}

.theme-group p {
  font-size: 0.8125rem;
  color: var(--primary);
  margin-top: 12px;
  margin-bottom: 0;
}

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

.path-links ul li a {
  font-weight: 600;
}

/* 侧栏 */
.sidebar {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: 24px;
}

.sidebar h2 {
  font-size: 1.125rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.sidebar p {
  font-size: 0.875rem;
  color: var(--muted);
}

.sidebar ul {
  margin-bottom: 16px;
}

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

.sidebar ul li a {
  font-size: 0.875rem;
  font-weight: 600;
}

/* ==========================================================================
   components / 专题策划页
   ========================================================================== */

.event-summary-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.event-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 4px;
}

.event-figure figcaption {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 8px;
  text-align: center;
}

.event-intro p {
  font-size: 0.9375rem;
  color: var(--muted);
}

.text-link {
  font-weight: 600;
  font-size: 0.875rem;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: step-counter;
}

.participation-steps .step-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  padding-left: 72px;
}

.participation-steps .step-item::before {
  counter-increment: step-counter;
  content: counter(step-counter);
  position: absolute;
  left: 20px;
  top: 24px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--accent);
  color: var(--ink);
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.participation-steps .step-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.participation-steps .step-item p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
}

.participation-steps .step-item a {
  font-weight: 600;
}

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

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

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

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

.link-card p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.link-card a {
  font-size: 0.8125rem;
  font-weight: 600;
}

/* 其他专题 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.related-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.related-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.related-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.related-item p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.related-item a {
  font-size: 0.8125rem;
  font-weight: 600;
}

/* ==========================================================================
   components / 联系反馈页
   ========================================================================== */

.paths-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.path-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

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

.path-card p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.feedback-flow {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.feedback-flow img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
}

.feedback-flow figcaption {
  font-size: 0.8125rem;
  color: var(--muted);
  text-align: center;
  margin-top: 8px;
}

.faq-section {
  margin-top: 48px;
}

.checklist-section {
  margin-top: 48px;
}

.checklist {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.checklist li {
  padding: 10px 0;
  padding-left: 32px;
  position: relative;
  font-size: 0.875rem;
  color: var(--muted);
  border-bottom: 1px dashed var(--border);
}

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

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 4px;
  top: 10px;
  color: var(--primary);
  font-weight: 700;
}

.next-links {
  margin-top: 48px;
}

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

.next-links ul li a {
  font-weight: 600;
}

/* ==========================================================================
   components / 全部栏目页
   ========================================================================== */

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

.index-card {
  display: block;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.index-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.index-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.index-card h3 {
  font-size: 1rem;
  padding: 16px 20px 4px;
  color: var(--primary);
}

.index-card p {
  font-size: 0.8125rem;
  color: var(--muted);
  padding: 0 20px 16px;
  margin-bottom: 0;
}

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

.role-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.role-item h3 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
}

.role-item p {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-bottom: 0;
}

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

.start-card {
  display: block;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.start-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.start-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.start-card p {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
}

.back-to-home {
  text-align: center;
  padding: 48px 0;
}

.home-link {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--primary);
  color: var(--white);
  border-radius: var(--radius);
  font-weight: 600;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.home-link:hover {
  background-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
}

/* ==========================================================================
   components / 404 页
   ========================================================================== */

.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-panel {
  text-align: center;
  padding: 48px 24px;
}

.error-code {
  font-family: var(--serif);
  font-size: 4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.error-panel h1 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.error-desc {
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 24px;
}

.btn-back-home {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--primary);
  color: var(--white);
  border-radius: var(--radius);
  font-weight: 600;
  margin-bottom: 24px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.btn-back-home:hover {
  background-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
}

.error-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.error-links a {
  font-size: 0.875rem;
  font-weight: 600;
}

/* ==========================================================================
   responsive / 响应式
   ========================================================================== */

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

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

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

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

  .page-layout {
    grid-template-columns: 1fr 280px;
    gap: 24px;
  }

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

/* 768px 断点 */
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    padding: 16px var(--pad);
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: block;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    order: 4;
    padding: 12px 0;
    gap: 0;
  }

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

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

  .nav-list li a {
    padding: 12px 16px;
    border-radius: 4px;
  }

  .nav-list li a.is-current {
    background-color: rgba(15, 107, 107, 0.08);
    color: var(--primary);
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 0;
  }

  .hero-content h1 {
    font-size: 1.75rem;
  }

  .hero-media {
    order: -1;
  }

  .hero-figure img {
    height: 220px;
  }

  .tag-groups {
    grid-template-columns: 1fr;
  }

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

  .category-items {
    grid-template-columns: 1fr;
  }

  .step-by-step .step-item {
    grid-template-columns: 1fr;
  }

  .step-media img {
    width: 100%;
    height: 160px;
  }

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

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

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

  .sidebar {
    position: static;
    margin-top: 24px;
  }

  .film-card {
    flex-direction: column;
  }

  .film-media,
  .film-media figure img {
    width: 100%;
    height: 180px;
  }

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

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

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

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

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

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

/* 520px 断点 */
@media (max-width: 520px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .brand-link {
    width: 100%;
  }

  .nav-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
  }

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

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

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

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

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

  .category-card {
    flex-direction: column;
  }

  .category-card img {
    width: 100%;
    height: 160px;
  }

  .page-header {
    padding: 12px 0 24px;
    margin-bottom: 32px;
  }

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

  .section-title {
    font-size: 1.25rem;
  }

  .start-steps .section-title {
    padding-left: 16px;
    padding-right: 16px;
  }

  .steps-container {
    padding: 0 16px;
  }

  .participation-steps .step-item {
    padding-left: 20px;
    padding-top: 72px;
  }

  .participation-steps .step-item::before {
    top: 20px;
    left: 20px;
  }
}