/* ============================================================
   Base — 全局变量、重置、字体与通用元素
   ============================================================ */
:root {
  --color-primary: #FF6B35;
  --color-primary-dark: #e85a24;
  --color-secondary: #3D8BFB;
  --color-secondary-dark: #2f75d6;
  --color-bg: #FFF7ED;
  --color-surface: #FFFFFF;
  --color-text: #2F3037;
  --color-text-light: #6b6d76;
  --color-highlight: #FFD166;
  --color-border: #f0e2d2;
  --color-footer-bg: #2F3037;
  --color-footer-text: #c9c9cf;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --container-width: 1200px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-card: 0 2px 8px rgba(47, 48, 55, 0.06);
  --shadow-hover: 0 6px 18px rgba(47, 48, 55, 0.1);
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 0.75rem;
}

/* ============================================================
   Layout — 全站骨架：页头、导航、主容器、页脚
   ============================================================ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

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

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.brand-name::first-letter {
  color: var(--color-primary);
}

.brand-slogan {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  white-space: nowrap;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

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

.nav-list li a {
  display: block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}

.nav-list li a:hover {
  color: var(--color-primary);
  background-color: rgba(255, 107, 53, 0.06);
}

.nav-list li a.is-current {
  color: var(--color-primary);
  background-color: rgba(255, 107, 53, 0.1);
  font-weight: 600;
}

.header-guide-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  flex-shrink: 0;
  transition: background-color var(--transition);
}

.header-guide-link:hover {
  background-color: var(--color-primary-dark);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.footer-desc {
  margin-bottom: 32px;
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.footer-desc p:not(.footer-brand) {
  max-width: 480px;
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h3 {
  font-size: 0.9375rem;
  color: #fff;
  margin-bottom: 12px;
}

.footer-col ul li a {
  display: inline-block;
  padding: 4px 0;
  font-size: 0.875rem;
  color: var(--color-footer-text);
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-copyright {
  padding-top: 24px;
  font-size: 0.8125rem;
  color: #8a8a92;
}

/* ============================================================
   Components — 通用组件：面包屑、标题区、卡片、标签、列表
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

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

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

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

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

.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 2rem;
  margin-bottom: 12px;
}

.page-description {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 720px;
}

.section-title {
  font-size: 1.375rem;
  margin-bottom: 16px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: 1.375rem;
}

.section-more {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-secondary);
  white-space: nowrap;
}

.section-more:hover {
  color: var(--color-primary);
}

.tag-label {
  display: inline-block;
  padding: 2px 10px;
  background-color: rgba(61, 139, 251, 0.1);
  color: var(--color-secondary);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
}

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

.role-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.role-card h3 {
  margin-bottom: 10px;
}

.role-card p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.role-card a {
  font-size: 0.875rem;
  font-weight: 600;
}

/* ============================================================
   Pages — 首页
   ============================================================ */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding: 48px 0 40px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 2.25rem;
  margin-bottom: 16px;
}

.hero-copy p {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  max-width: 480px;
  margin-bottom: 24px;
}

.hero-cta {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background-color var(--transition);
}

.hero-cta:hover {
  background-color: var(--color-primary-dark);
  color: #fff;
}

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

.hero-figure {
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.hero-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.hero-quicklinks {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 16px;
}

.quick-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.quick-card h2 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.quick-card p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.quick-card a {
  font-size: 0.875rem;
  font-weight: 600;
}

.tag-bar-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.tag-bar-copy {
  margin-bottom: 20px;
}

.tag-bar-copy h2 {
  margin-bottom: 8px;
}

.tag-bar-copy p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

.tag-item:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: #fff;
}

.updates-preview,
.rank-preview {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.update-timeline {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.update-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition);
}

.update-item:hover {
  transform: translateY(-2px);
}

.update-item img {
  width: 72px;
  height: 96px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

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

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

.update-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.update-type {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.update-note {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

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

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

.rank-item:hover {
  transform: translateY(-2px);
}

.rank-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-highlight);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-text);
  flex-shrink: 0;
}

.rank-item img {
  width: 56px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

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

.rank-info h3 {
  font-size: 1rem;
  margin-bottom: 2px;
}

.rank-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.rank-status {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  white-space: nowrap;
}

.guide-block {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.guide-block .section-heading p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
}

.notice-preview {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.notice-content {
  background-color: var(--color-highlight);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.notice-content h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.notice-content p {
  color: var(--color-text);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

.notice-link {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-text);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  white-space: nowrap;
}

.notice-link:hover {
  background-color: var(--color-primary);
  color: #fff;
}

/* ============================================================
   Pages — 题材分类页 (hxmh/tags.html)
   ============================================================ */
.page-tags .section-title {
  margin-top: 40px;
}

.tag-overview {
  margin-bottom: 48px;
}

.tag-overview > p {
  color: var(--color-text-light);
  max-width: 720px;
}

.tag-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.tag-pills li a {
  display: inline-block;
  padding: 6px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-text);
  transition: all var(--transition);
}

.tag-pills li a:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: #fff;
}

.subject-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 48px;
}

.subject-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition);
}

.subject-item:hover {
  transform: translateY(-2px);
}

.subject-media img {
  width: 180px;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.subject-content h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.subject-content p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.subject-example {
  font-size: 0.875rem;
}

.subject-example strong {
  color: var(--color-text);
}

.subject-direction {
  font-size: 0.875rem;
  background-color: rgba(255, 209, 102, 0.2);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-highlight);
}

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

.selection-tip {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
}

.selection-tip > p {
  color: var(--color-text-light);
  max-width: 720px;
}

.tip-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.tip-steps li {
  padding: 20px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
}

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

.tip-steps p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.tip-more {
  font-size: 0.875rem;
}

/* ============================================================
   Pages — 更新动态页 (hxmh/updates.html)
   ============================================================ */
.update-intro {
  margin-bottom: 32px;
}

.update-intro p {
  color: var(--color-text-light);
  max-width: 720px;
}

.update-timeline {
  margin-bottom: 48px;
}

.update-timeline > .section-title {
  margin-top: 40px;
}

.update-item .update-media img {
  width: 96px;
  height: 128px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.update-title {
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.update-meta {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.update-desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.tracking-guide {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
}

.tracking-guide p {
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 12px;
}

/* ============================================================
   Pages — 人气榜页 (hxmh/rank.html)
   ============================================================ */
.section-block {
  margin-bottom: 48px;
}

.rank-intro p {
  color: var(--color-text-light);
  max-width: 720px;
}

.section-desc {
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.rank-list-section .rank-list {
  gap: 16px;
}

.rank-card {
  display: grid;
  grid-template-columns: 48px 88px 1fr 120px;
  align-items: center;
  gap: 20px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition);
}

.rank-card:hover {
  transform: translateY(-2px);
}

.rank-cover-wrap img {
  width: 88px;
  height: 112px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.rank-info {
  min-width: 0;
}

.rank-title {
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.rank-tags {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.rank-desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.rank-status {
  text-align: right;
}

.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.status-serial {
  background-color: rgba(61, 139, 251, 0.1);
  color: var(--color-secondary);
}

.status-paused {
  background-color: rgba(107, 109, 118, 0.1);
  color: var(--color-text-light);
}

.status-link {
  display: block;
  font-size: 0.8125rem;
}

.rank-analysis p {
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 12px;
}

.rank-analysis strong {
  color: var(--color-text);
}

.rank-status-note {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
}

.rank-status-note > p {
  color: var(--color-text-light);
  max-width: 720px;
}

.status-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 20px 0;
}

.status-list li {
  padding: 12px 16px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

.status-list strong {
  color: var(--color-text);
  margin-right: 8px;
}

/* ============================================================
   Pages — 阅读指南页 (hxmh/guide.html)
   ============================================================ */
.guide-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.guide-intro-media {
  order: 1;
}

.guide-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.guide-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.guide-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--color-text-light);
  background-color: var(--color-surface);
}

.guide-intro-text {
  order: 2;
}

.guide-intro-text h2 {
  font-size: 1.375rem;
  margin-bottom: 12px;
}

.guide-intro-text p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.role-modules {
  margin-bottom: 48px;
}

.role-modules > h2 {
  font-size: 1.375rem;
  margin-bottom: 24px;
}

.role-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.role-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--color-highlight);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
  flex-shrink: 0;
}

.role-card-head h3 {
  margin-bottom: 0;
}

.role-content h4 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
  color: var(--color-text);
}

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

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

.method-section {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.method-section > h2 {
  font-size: 1.375rem;
  margin-bottom: 16px;
}

.method-content > p {
  color: var(--color-text-light);
  max-width: 720px;
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.method-steps li {
  padding: 20px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
}

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

.method-steps p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.rhythm-section {
  margin-bottom: 48px;
}

.rhythm-section > h2 {
  font-size: 1.375rem;
  margin-bottom: 16px;
}

.rhythm-content > p {
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 24px;
}

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

.rhythm-point {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
}

.rhythm-point h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.rhythm-point p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

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

.faq-section > h2 {
  font-size: 1.375rem;
  margin-bottom: 24px;
}

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

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

.faq-item summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background-color var(--transition);
}

.faq-item summary:hover {
  background-color: rgba(255, 107, 53, 0.04);
}

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

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

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

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

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

/* ============================================================
   Pages — 站点公告页 (hxmh/notice.html)
   ============================================================ */
.intro {
  margin-bottom: 48px;
}

.intro-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.intro-text p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.intro-media figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.intro-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.intro-media figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--color-text-light);
  background-color: var(--color-surface);
}

.principles {
  margin-bottom: 48px;
}

.principles-lead {
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 24px;
}

.principles-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.principle-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  transition: transform var(--transition);
}

.principle-item:hover {
  transform: translateY(-2px);
}

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

.principle-item p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.feedback {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
}

.feedback-lead {
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 24px;
}

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

.feedback-step {
  padding: 20px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
}

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

.feedback-step p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.feedback-note {
  padding: 16px 20px;
  background-color: rgba(255, 209, 102, 0.15);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-highlight);
}

.feedback-note p {
  font-size: 0.875rem;
  color: var(--color-text);
  margin-bottom: 0;
}

/* ============================================================
   Pages — 404 页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-block {
  text-align: center;
  max-width: 520px;
}

.error-block h1 {
  font-size: 4rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.error-block p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.error-home-link {
  display: inline-block;
  margin-top: 16px;
  padding: 12px 28px;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.error-home-link:hover {
  background-color: var(--color-primary-dark);
  color: #fff;
}

/* ============================================================
   Responsive — 响应式断点
   ============================================================ */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .brand-slogan {
    display: none;
  }

  .hero-section {
    gap: 32px;
  }

  .rank-card {
    grid-template-columns: 40px 72px 1fr;
    gap: 16px;
  }

  .rank-status {
    grid-column: 3;
    text-align: left;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
    padding: 0 16px;
    gap: 12px;
  }

  .brand-name {
    font-size: 1.25rem;
  }

  .header-guide-link {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    justify-content: flex-end;
  }

  .nav-list {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(47, 48, 55, 0.08);
    display: none;
    gap: 4px;
  }

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

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

  .inner-main {
    padding: 24px 16px 48px;
  }

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

  .hero-section {
    grid-template-columns: 1fr;
    padding: 32px 0 24px;
    gap: 24px;
  }

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

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

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

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

  .subject-item {
    grid-template-columns: 120px 1fr;
    gap: 16px;
    padding: 16px;
  }

  .subject-media img {
    width: 120px;
    height: 160px;
  }

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

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

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

  .guide-intro {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .guide-intro-media {
    order: 2;
  }

  .guide-intro-text {
    order: 1;
  }

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

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

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

  .notice-content {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }

  .rank-card {
    grid-template-columns: 36px 64px 1fr;
    gap: 12px;
    padding: 12px 16px;
  }

  .rank-cover-wrap img {
    width: 64px;
    height: 84px;
  }

  .rank-status {
    grid-column: 3;
    text-align: left;
  }

  .update-item {
    padding: 12px 16px;
    gap: 14px;
  }

  .update-item img {
    width: 60px;
    height: 80px;
  }

  .update-item .update-media img {
    width: 72px;
    height: 96px;
  }

  .footer-inner {
    padding: 32px 16px 20px;
  }

  .footer-links {
    flex-direction: column;
    gap: 24px;
  }

  .footer-desc {
    margin-bottom: 24px;
  }
}

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

  .page-title {
    font-size: 1.625rem;
  }

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

  .hero-copy p {
    font-size: 1rem;
  }

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

  .subject-media img {
    width: 100%;
    height: 200px;
  }

  .rank-item {
    gap: 12px;
    padding: 10px 12px;
  }

  .rank-item img {
    width: 48px;
    height: 64px;
  }

  .rank-number {
    width: 28px;
    height: 28px;
    font-size: 0.8125rem;
  }

  .rank-card {
    grid-template-columns: 28px 56px 1fr;
    gap: 10px;
    padding: 10px 12px;
  }

  .rank-cover-wrap img {
    width: 56px;
    height: 76px;
  }

  .rank-status {
    grid-column: 3;
  }

  .update-item {
    flex-direction: row;
    align-items: flex-start;
  }

  .update-item img,
  .update-item .update-media img {
    width: 56px;
    height: 76px;
  }

  .update-note {
    font-size: 0.8125rem;
  }

  .breadcrumb {
    font-size: 0.8125rem;
    margin-bottom: 16px;
  }

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

  .section-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .tag-item {
    padding: 6px 14px;
    font-size: 0.8125rem;
  }

  .faq-item summary {
    padding: 14px 16px;
  }

  .faq-answer {
    padding: 0 16px 16px;
  }

  .error-block h1 {
    font-size: 3rem;
  }
}