/* ==========================================================
   base
   ========================================================== */
:root {
  --color-bg: #1a1a2e;
  --color-bg-alt: #16213e;
  --color-bg-deep: #0f3460;
  --color-accent: #e94560;
  --color-text: #f5f5f5;
  --color-text-muted: #b0b0c0;
  --color-border: rgba(255, 255, 255, 0.12);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --header-height: 64px;
  --space-section: 56px;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  color: var(--color-text-muted);
}

/* ==========================================================
   layout
   ========================================================== */
.site-header {
  background-color: var(--color-bg-alt);
  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 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-logo {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.brand-logo: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 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  color: var(--color-text);
  background-color: rgba(233, 69, 96, 0.12);
}

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

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

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
}

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

.site-main.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 24px;
  display: grid;
  grid-template-columns: 1.2fr 2fr 1fr;
  gap: 40px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
}

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

.footer-nav h3,
.footer-info h3 {
  font-size: 16px;
  margin-bottom: 16px;
}

.footer-nav ul li,
.footer-info ul li {
  margin-bottom: 8px;
}

.footer-nav ul li a,
.footer-info ul li a {
  font-size: 14px;
  color: var(--color-text-muted);
}

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

.footer-feedback p {
  font-size: 14px;
  line-height: 1.7;
}

.footer-copyright {
  border-top: 1px solid var(--color-border);
  padding: 16px 20px;
  text-align: center;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--color-text-muted);
  opacity: 0.6;
}

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

/* 页面标题区 */
.page-header {
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-description {
  font-size: 15px;
  max-width: 720px;
}

/* ==========================================================
   components
   ========================================================== */
/* 区块标题 */
.section-heading {
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-heading p {
  font-size: 14px;
}

.section-title {
  font-size: 24px;
  margin-bottom: 24px;
}

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

.hero-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.hero-feature-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
}

.hero-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

.hero-info {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.hero-info h1 {
  font-size: 28px;
  font-weight: 700;
}

.hero-desc {
  font-size: 15px;
  line-height: 1.7;
  flex: 1;
}

.hero-cta {
  display: inline-block;
  align-self: flex-start;
  padding: 10px 24px;
  background-color: var(--color-accent);
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.hero-cta:hover {
  background-color: #d63856;
  color: var(--color-text);
  transform: translateY(-1px);
}

.hero-rank {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--color-border);
}

.hero-rank h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

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

.rank-list li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background-color: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.rank-list li a:hover {
  background-color: rgba(233, 69, 96, 0.1);
}

.rank-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  min-width: 24px;
}

/* 分类导航带 */
.category-nav-section {
  padding: 40px 0;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.category-tags li a {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.category-tags li a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text);
}

/* 最近更新 */
.recent-updates {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px;
}

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

.update-group h3 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

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

.update-item {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.update-item img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.update-item span {
  display: block;
}

.update-title {
  padding: 12px 12px 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.update-status {
  padding: 0 12px 12px;
  font-size: 13px;
  color: var(--color-accent);
}

/* 榜单预览 */
.rank-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px;
}

.rank-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.rank-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

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

.rank-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.rank-card h3 {
  font-size: 16px;
}

.rank-card p {
  font-size: 14px;
  line-height: 1.6;
  flex: 1;
}

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

/* 指南入口 */
.guide-entry {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px;
}

.guide-entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.guide-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease;
}

.guide-card:hover {
  border-color: var(--color-accent);
}

.guide-card h3 {
  font-size: 18px;
}

.guide-card p {
  font-size: 14px;
  line-height: 1.7;
  flex: 1;
}

.guide-card a {
  align-self: flex-start;
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
}

/* 专题推荐 */
.feature-recommend {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feature-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease;
}

.feature-card:hover {
  border-color: var(--color-accent);
}

.feature-card h3 {
  font-size: 18px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.7;
  flex: 1;
}

.feature-card a {
  align-self: flex-start;
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
}

/* ==========================================================
   内页通用组件
   ========================================================== */
/* 分类页 */
.tag-cloud {
  margin-bottom: 48px;
}

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

.tag-link {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.tag-link:hover {
  background-color: var(--color-accent);
  color: var(--color-text);
}

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

.category-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  align-items: center;
}

.category-text h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.category-text p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.category-figure {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.category-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

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

.reading-guide-links {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.reading-guide-links p {
  font-size: 15px;
  line-height: 1.8;
}

.reading-guide-links p a {
  color: var(--color-accent);
}

/* 指南页 */
.guide-section {
  margin-bottom: 48px;
}

.guide-section > h2 {
  font-size: 24px;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

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

.step-item {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-number {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  min-width: 32px;
}

.step-content h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 14px;
  line-height: 1.7;
}

.tips-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  align-items: center;
}

.guide-figure {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

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

.tips-text p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
}

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

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text);
  list-style: none;
  position: relative;
  padding-right: 40px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-accent);
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  line-height: 1.7;
}

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

.related-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
  transition: border-color 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-card:hover {
  border-color: var(--color-accent);
}

.related-card h3 {
  font-size: 16px;
}

.related-card p {
  font-size: 14px;
  line-height: 1.6;
}

/* 追更技巧页 */
.article-hero-figure {
  margin-bottom: 32px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-hero-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.article-hero-figure figcaption {
  padding: 10px 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

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

.tips-section > h2 {
  font-size: 24px;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

.tips-section > p {
  font-size: 14px;
  margin-bottom: 24px;
  max-width: 720px;
}

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

.tip-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
}

.tip-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.tip-card p {
  font-size: 14px;
  line-height: 1.7;
}

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

.remind-section > h2 {
  font-size: 24px;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

.remind-section > p {
  font-size: 14px;
  margin-bottom: 24px;
  max-width: 720px;
}

.remind-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.remind-step {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
}

.remind-step h3 {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.remind-step p {
  font-size: 13px;
  line-height: 1.6;
}

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

.notes-section > h2 {
  font-size: 24px;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

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

.note-item {
  background-color: rgba(233, 69, 96, 0.08);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
}

.note-item h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.note-item p {
  font-size: 14px;
  line-height: 1.6;
}

.related-links {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.related-links h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.related-links ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-links ul li a {
  font-size: 14px;
  color: var(--color-text-muted);
}

.related-links ul li a:hover {
  color: var(--color-accent);
}

/* 专题页 */
.feature-header {
  margin-bottom: 48px;
}

.feature-header > h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.feature-header > p {
  font-size: 14px;
  margin-bottom: 24px;
  max-width: 720px;
}

.feature-header .feature-card {
  margin-bottom: 16px;
}

.feature-card .feature-media {
  overflow: hidden;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.feature-card .feature-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.feature-body h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-body p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 12px;
}

.feature-body a {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-accent);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.feature-body a:hover {
  background-color: #d63856;
  color: var(--color-text);
}

.editor-picks {
  margin-bottom: 48px;
}

.editor-picks > h2 {
  font-size: 24px;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

.editor-picks > p {
  font-size: 14px;
  margin-bottom: 24px;
  max-width: 720px;
}

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

.pick-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s ease;
}

.pick-card:hover {
  border-color: var(--color-accent);
}

.pick-card h3 {
  font-size: 16px;
}

.pick-card p {
  font-size: 14px;
  line-height: 1.6;
  flex: 1;
}

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

.article-content {
  margin-bottom: 48px;
}

.article-content > h2 {
  font-size: 24px;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

.content-block {
  margin-bottom: 32px;
}

.content-block h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.content-block p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.related-recommend {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.related-recommend > h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.related-recommend > p {
  font-size: 14px;
  margin-bottom: 24px;
}

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

.related-recommend .related-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.2s ease;
}

.related-recommend .related-card:hover {
  border-color: var(--color-accent);
}

.related-recommend .related-card h3 {
  font-size: 16px;
}

.related-recommend .related-card p {
  font-size: 14px;
  line-height: 1.6;
}

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

/* 404 页 */
.error-main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 80px 20px;
  text-align: center;
  min-height: 60vh;
}

.error-panel {
  margin-bottom: 40px;
}

.error-panel h1 {
  font-size: 72px;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.error-panel p {
  font-size: 15px;
  margin-bottom: 8px;
  max-width: 480px;
}

.error-home-link {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 32px;
  background-color: var(--color-accent);
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.error-home-link:hover {
  background-color: #d63856;
  color: var(--color-text);
}

.error-suggest h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.error-suggest ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.error-suggest ul li a {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.error-suggest ul li a:hover {
  background-color: var(--color-accent);
  color: var(--color-text);
}

/* 工具类 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================
   responsive
   ========================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-rank {
    order: 2;
  }

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

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

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

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

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

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

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

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

@media (max-width: 768px) {
  :root {
    --space-section: 40px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 20px;
  }

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: 0 16px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 0;
    gap: 4px;
  }

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

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

  .site-nav:has(.nav-list.is-open) {
    max-height: 400px;
  }

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

  .page-header {
    padding: 24px 0 20px;
    margin-bottom: 32px;
  }

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

  .hero-section {
    padding: 24px 0;
  }

  .hero-grid {
    padding: 0 16px;
    gap: 16px;
  }

  .hero-info {
    padding: 16px;
  }

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

  .hero-rank {
    padding: 16px;
  }

  .category-nav-section {
    padding: 24px 16px;
  }

  .recent-updates {
    padding: 24px 16px;
  }

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

  .rank-preview {
    padding: 24px 16px;
  }

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

  .guide-entry {
    padding: 24px 16px;
  }

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

  .feature-recommend {
    padding: 24px 16px;
  }

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

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

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

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

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

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

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

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

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

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

  .footer-links {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

@media (max-width: 390px) {
  .header-inner {
    padding: 0 12px;
  }

  .brand-logo {
    font-size: 16px;
  }

  .site-main.inner-main {
    padding: 0 12px;
  }

  .hero-grid {
    padding: 0 12px;
  }

  .category-nav-section {
    padding-left: 12px;
    padding-right: 12px;
  }

  .recent-updates {
    padding-left: 12px;
    padding-right: 12px;
  }

  .rank-preview {
    padding-left: 12px;
    padding-right: 12px;
  }

  .guide-entry {
    padding-left: 12px;
    padding-right: 12px;
  }

  .feature-recommend {
    padding-left: 12px;
    padding-right: 12px;
  }

  .step-item {
    padding: 16px;
  }

  .category-item {
    padding: 16px;
  }

  .tips-card {
    padding: 16px;
  }

  .faq-item summary {
    padding: 14px 36px 14px 14px;
    font-size: 14px;
  }

  .faq-item p {
    padding: 0 14px 14px;
    font-size: 13px;
  }

  .rank-card,
  .guide-card,
  .feature-card,
  .tip-card,
  .remind-step,
  .pick-card,
  .related-card {
    padding: 16px;
  }
}

/* 滚动出现动画（增强，不影响初始可见性） */
@media (prefers-reduced-motion: no-preference) {
  .hero-section,
  .category-nav-section,
  .recent-updates,
  .rank-preview,
  .guide-entry,
  .feature-recommend,
  .guide-section,
  .tips-section,
  .remind-section,
  .notes-section,
  .feature-header,
  .editor-picks,
  .article-content,
  .related-recommend {
    animation: fadeInUp 0.5s ease both;
  }

  .hero-section {
    animation-delay: 0s;
  }

  .category-nav-section {
    animation-delay: 0.05s;
  }

  .recent-updates {
    animation-delay: 0.1s;
  }

  .rank-preview {
    animation-delay: 0.15s;
  }

  .guide-entry {
    animation-delay: 0.2s;
  }

  .feature-recommend {
    animation-delay: 0.25s;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0.6;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}