@import url('https://fonts.googleapis.com/css2?family=Lora:wght@400;500;600;700&family=Raleway:wght@300;400;500;600;700&display=swap');

/* ===========================
   CSS 自定义属性
=========================== */
:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e8e8e8;
  --color-gray-400: #999999;
  --color-gray-600: #555555;
  --color-gray-800: #222222;
  --color-accent: #c8102e;
  --color-accent-dim: #8a0b1f;

  --font-serif: 'Lora', Georgia, 'Noto Serif SC', serif;
  --font-sans: 'Raleway', 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;

  --base: 8px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --nav-height: 64px;
  --max-content: 900px;
  --max-wide: 1400px;

  --radius: 4px;
  --transition: 0.25s ease;
}

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

html {
  font-size: 17px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--color-black);
  color: var(--color-white);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, menu {
  list-style: none;
}

button, summary {
  cursor: pointer;
  border: none;
  background: none;
}

summary::-webkit-details-marker {
  display: none;
}

/* ===========================
   排版
=========================== */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }

p {
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: var(--space-2);
}

/* ===========================
   布局骨架
=========================== */
.site-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 100vh;
  padding-bottom: var(--nav-height);
}

main {
  width: 100%;
}

.wrap {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

/* ===========================
   底部固定导航
=========================== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-black);
  border-top: 1px solid var(--color-gray-800);
}

.bottom-nav__inner {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 var(--space-2);
  gap: var(--space-2);
}

.nav-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-gray-600);
  border-radius: var(--radius);
  flex-shrink: 0;
  transition: border-color var(--transition);
}

.nav-brand:hover {
  border-color: var(--color-white);
}

.nav-brand-icon {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.nav-menu-wrap {
  flex: 1;
  position: relative;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: var(--space-1);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav-menu-wrap[open] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-menu-wrap[open] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-menu-wrap[open] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-dropdown {
  position: absolute;
  bottom: calc(100% + var(--nav-height) - 8px);
  left: 0;
  background: var(--color-black);
  border: 1px solid var(--color-gray-800);
  border-radius: var(--radius);
  min-width: 260px;
  padding: var(--space-2) 0;
  animation: menuFadeIn 0.2s ease;
}

@keyframes menuFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.nav-dropdown li a {
  display: block;
  padding: 12px var(--space-3);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-gray-200);
  transition: color var(--transition), background var(--transition);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-dropdown li a:hover,
.nav-dropdown li a[aria-current="page"] {
  color: var(--color-white);
  background: var(--color-gray-800);
}

.nav-cta {
  display: flex;
  align-items: center;
  height: 44px;
  padding: 0 var(--space-2);
  background: var(--color-white);
  color: var(--color-black);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.nav-cta:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ===========================
   Hero（首页）
=========================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  margin-bottom: var(--space-5);
}

.hero-content {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: var(--space-6) var(--space-3) var(--space-7);
  background: var(--color-black);
}

.hero-bg-text {
  position: absolute;
  top: 10%;
  left: -0.05em;
  font-family: var(--font-serif);
  font-size: clamp(8rem, 25vw, 24rem);
  font-weight: 700;
  color: rgba(255,255,255,0.04);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.04em;
}

.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-text-wrap {
  position: relative;
  z-index: 2;
  text-align: right;
  max-width: 680px;
}

.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-gray-400);
  margin-bottom: var(--space-4);
  max-width: 480px;
  margin-left: auto;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 var(--space-4);
  background: var(--color-white);
  color: var(--color-black);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.hero-btn:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ===========================
   分区通用
=========================== */
.section-eyebrow {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-gray-800);
}

/* ===========================
   频道卡片网格（首页）
=========================== */
.channels-section {
  padding: var(--space-5) 0;
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-2);
}

.channel-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  grid-column: span 6;
  background: var(--color-gray-800);
  border-radius: var(--radius);
  padding: var(--space-3);
  position: relative;
  overflow: hidden;
  transition: background var(--transition), transform var(--transition);
  min-height: 140px;
}

.channel-card:hover {
  background: var(--color-gray-600);
  transform: translateY(-2px);
}

.channel-card > strong {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.3;
}

.card-desc {
  font-size: 0.8rem;
  color: var(--color-gray-400);
  line-height: 1.5;
  flex: 1;
}

.card-num {
  font-family: var(--font-sans);
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(255,255,255,0.06);
  position: absolute;
  bottom: var(--space-1);
  right: var(--space-2);
  line-height: 1;
  letter-spacing: -0.05em;
}

/* ===========================
   最新文章列表
=========================== */
.latest-section {
  padding: var(--space-5) 0;
}

.latest-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.article-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-gray-800);
  gap: var(--space-3);
  transition: color var(--transition);
}

.article-item:hover {
  color: var(--color-gray-400);
}

.article-item > strong {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-white);
  transition: color var(--transition);
}

.article-item:hover > strong {
  color: var(--color-gray-400);
}

.article-meta {
  font-size: 0.75rem;
  color: var(--color-gray-600);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ===========================
   正文容器
=========================== */
.content-section {
  padding: var(--space-5) 0;
}

.content-body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-gray-200);
  max-width: var(--max-content);
}

.content-body h2,
.content-body h3,
.content-body h4 {
  font-family: var(--font-serif);
  color: var(--color-white);
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
}

.content-body p {
  margin-bottom: var(--space-2);
}

.content-body ul,
.content-body ol {
  padding-left: var(--space-3);
  margin-bottom: var(--space-2);
}

.content-body li {
  margin-bottom: var(--space-1);
  line-height: 1.7;
}

.content-body a {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.content-body a:hover {
  color: var(--color-gray-400);
}

.content-body strong {
  color: var(--color-white);
  font-weight: 600;
}

.content-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-3);
  color: var(--color-gray-400);
  margin: var(--space-4) 0;
}

/* ===========================
   栏目页 Hero
=========================== */
.channel-hero {
  min-height: 55vh;
  display: flex;
  align-items: flex-end;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  margin-bottom: var(--space-4);
}

.channel-hero__content {
  position: relative;
  width: 100%;
  min-height: 55vh;
  display: flex;
  align-items: flex-end;
  padding: var(--space-5) var(--space-3) var(--space-6);
  background: var(--color-black);
}

.channel-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.channel-hero__num {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-family: var(--font-serif);
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 700;
  color: rgba(255,255,255,0.04);
  line-height: 1;
  letter-spacing: -0.04em;
  pointer-events: none;
}

.channel-hero__text {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.breadcrumb-link {
  font-size: 0.8rem;
  color: var(--color-gray-600);
  display: inline-block;
  margin-bottom: var(--space-2);
  min-height: 44px;
  line-height: 44px;
  transition: color var(--transition);
}

.breadcrumb-link:hover {
  color: var(--color-white);
}

.channel-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.channel-desc {
  font-size: 1rem;
  color: var(--color-gray-400);
  max-width: 560px;
}

/* ===========================
   栏目子页卡片
=========================== */
.channel-content-section,
.children-section {
  padding: var(--space-4) 0;
}

.children-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-2);
}

.child-card {
  grid-column: span 12;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: var(--color-gray-800);
  border-radius: var(--radius);
  padding: var(--space-3);
  transition: background var(--transition), transform var(--transition);
  position: relative;
}

.child-card:hover {
  background: var(--color-gray-600);
  transform: translateX(4px);
}

.child-card > strong {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
}

.child-card__desc {
  font-size: 0.875rem;
  color: var(--color-gray-400);
  line-height: 1.6;
}

.child-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-gray-600);
  margin-top: var(--space-1);
}

.child-card__img {
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-top: var(--space-2);
}

/* stagger 动画 */
.stagger-item {
  opacity: 0;
  transform: translateY(16px);
  animation: staggerIn 0.5s ease forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.05s; }
.stagger-item:nth-child(2) { animation-delay: 0.1s; }
.stagger-item:nth-child(3) { animation-delay: 0.15s; }
.stagger-item:nth-child(4) { animation-delay: 0.2s; }
.stagger-item:nth-child(5) { animation-delay: 0.25s; }
.stagger-item:nth-child(6) { animation-delay: 0.3s; }

@keyframes staggerIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .stagger-item {
    opacity: 1;
    transform: none;
    animation: none;
  }
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ===========================
   文章页
=========================== */
.article-section {
  padding-top: var(--space-5);
}

.article-main {
  max-width: var(--max-content);
}

.article-header {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-800);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.8rem;
  color: var(--color-gray-600);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.article-breadcrumb a {
  color: var(--color-gray-600);
  transition: color var(--transition);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

.article-hero-img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: var(--space-4);
}

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.article-meta-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.article-date {
  font-size: 0.8rem;
  color: var(--color-gray-600);
}

.article-body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-gray-200);
  max-width: var(--max-content);
}

.article-body h2,
.article-body h3,
.article-body h4 {
  font-family: var(--font-serif);
  color: var(--color-white);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.article-body p { margin-bottom: var(--space-2); }

.article-body ul,
.article-body ol {
  padding-left: var(--space-3);
  margin-bottom: var(--space-2);
}

.article-body li {
  margin-bottom: var(--space-1);
}

.article-body a {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a:hover {
  color: var(--color-gray-400);
}

.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-3);
  color: var(--color-gray-400);
  margin: var(--space-4) 0;
}

.article-footer {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-800);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.article-cta-text {
  font-size: 0.9rem;
  color: var(--color-gray-400);
  margin: 0;
}

.article-back-btn {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-gray-600);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-white);
  transition: border-color var(--transition), background var(--transition);
}

.article-back-btn:hover {
  background: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-white);
}

/* 相关文章 */
.related-section {
  padding: var(--space-5) 0;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

.related-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-800);
  border-radius: var(--radius);
  transition: background var(--transition);
}

.related-item:hover {
  background: var(--color-gray-600);
}

.related-item > strong {
  font-size: 0.95rem;
  color: var(--color-white);
}

.related-item > span {
  font-size: 0.75rem;
  color: var(--color-gray-600);
}

/* ===========================
   关于页
=========================== */
.about-section {
  padding-top: var(--space-6);
}

.about-article {
  max-width: var(--max-content);
}

.about-header {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-white);
}

.about-tag {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.about-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.about-body {
  margin-bottom: var(--space-5);
}

.about-contact {
  padding-top: var(--space-4);
}

.about-note {
  color: var(--color-gray-400);
  font-size: 0.95rem;
}

/* ===========================
   隐私页
=========================== */
.privacy-section {
  padding-top: var(--space-6);
}

.privacy-article {
  max-width: var(--max-content);
}

.privacy-header {
  margin-bottom: var(--space-5);
}

.privacy-rule-line {
  width: 48px;
  height: 4px;
  background: var(--color-accent);
  margin-bottom: var(--space-3);
}

.privacy-tag {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--color-gray-600);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.privacy-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.privacy-dates {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.privacy-body {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-gray-800);
}

.privacy-nav-block {
  padding-top: var(--space-4);
}

.privacy-related-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.privacy-related-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-3);
  border: 1px solid var(--color-gray-800);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
}

.privacy-related-item:hover {
  border-color: var(--color-white);
  background: var(--color-gray-800);
}

.privacy-related-item > strong {
  font-size: 1rem;
  color: var(--color-white);
}

.privacy-related-item > span {
  font-size: 0.8rem;
  color: var(--color-gray-400);
}

/* ===========================
   侧边栏
=========================== */
.global-aside {
  width: 100%;
  padding: var(--space-4) var(--space-3);
  background: var(--color-gray-800);
  margin: 0;
}

.aside-inner {
  max-width: var(--max-wide);
  margin: 0 auto;
}

.aside-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.aside-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.aside-links li a {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 var(--space-2);
  background: var(--color-black);
  border-radius: var(--radius);
  font-size: 0.8rem;
  color: var(--color-gray-200);
  transition: color var(--transition), background var(--transition);
}

.aside-links li a:hover {
  color: var(--color-white);
  background: var(--color-gray-600);
}

.aside-back {
  margin-top: var(--space-3);
}

.aside-back-link {
  font-size: 0.85rem;
  color: var(--color-gray-400);
  display: inline-flex;
  align-items: center;
  height: 44px;
  transition: color var(--transition);
}

.aside-back-link:hover {
  color: var(--color-white);
}

/* ===========================
   页脚
=========================== */
.site-footer {
  background: var(--color-black);
  border-top: 1px solid var(--color-gray-800);
  padding: var(--space-6) 0 var(--space-4);
}

.footer-inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.footer-brand-block {
  margin-bottom: var(--space-5);
  overflow: hidden;
}

.footer-brand-text {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 8vw, 6rem);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.03em;
  line-height: 1;
  opacity: 0.12;
  white-space: nowrap;
}

.footer-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.footer-col small {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-gray-600);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.footer-address {
  font-style: normal;
  color: var(--color-gray-400);
  font-size: 0.875rem;
  line-height: 1.7;
}

.footer-address p {
  margin-bottom: 4px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-links li a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 0.875rem;
  color: var(--color-gray-400);
  transition: color var(--transition);
}

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

.footer-bottom {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-800);
  text-align: center;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--color-gray-600);
  margin: 0;
}

/* ===========================
   默认页
=========================== */
.default-section {
  padding-top: var(--space-6);
}

.default-article {
  max-width: var(--max-content);
}

.empty-tip {
  color: var(--color-gray-600);
  font-size: 0.9rem;
}

/* ===========================
   响应式断点
=========================== */

/* 平板 ≥600px */
@media (min-width: 600px) {
  .channels-grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .channel-card {
    grid-column: span 4;
  }

  .children-grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .child-card {
    grid-column: span 6;
  }

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

  .privacy-related-links {
    flex-direction: row;
  }

  .privacy-related-item {
    flex: 1;
  }

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

  .global-aside .aside-inner {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
  }
}

/* 桌面 ≥1024px */
@media (min-width: 1024px) {
  .wrap {
    padding: 0 var(--space-5);
  }

  .channel-card {
    grid-column: span 3;
  }

  .child-card {
    grid-column: span 4;
  }

  .site-wrapper {
    display: grid;
    grid-template-columns: 1fr 280px;
    grid-template-rows: auto 1fr auto auto;
    grid-template-areas:
      "main aside"
      "main aside"
      "footer footer"
      "nav nav";
    padding-bottom: var(--nav-height);
  }

  main {
    grid-area: main;
  }

  .global-aside {
    grid-area: aside;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: var(--space-5) var(--space-3);
    background: var(--color-gray-800);
    border-left: 1px solid var(--color-gray-600);
  }

  .global-aside .aside-inner {
    display: block;
  }

  .aside-links {
    flex-direction: column;
    gap: 0;
  }

  .aside-links li a {
    width: 100%;
    height: 44px;
    border-radius: 0;
    border-bottom: 1px solid var(--color-gray-600);
    background: transparent;
    padding: 0;
  }

  .aside-links li:first-child a {
    border-top: 1px solid var(--color-gray-600);
  }

  .site-footer {
    grid-area: footer;
  }

  .bottom-nav {
    grid-area: nav;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
  }

  .footer-cols {
    grid-template-columns: repeat(3, 1fr);
  }

  .nav-menu-wrap {
    flex: unset;
  }

  .nav-dropdown {
    bottom: calc(100% + 8px);
  }

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

/* 大屏 ≥1440px */
@media (min-width: 1440px) {
  .wrap {
    padding: 0 var(--space-6);
  }

  .channel-card {
    grid-column: span 2;
  }
}

/* ===========================
   工具
=========================== */
.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;
}

:focus-visible {
  outline: 2px solid var(--color-white);
  outline-offset: 3px;
}

::selection {
  background: var(--color-white);
  color: var(--color-black);
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-black);
}
::-webkit-scrollbar-thumb {
  background: var(--color-gray-600);
  border-radius: 3px;
}