```css
/* ============================================
   17吃瓜 - 完整样式表
   风格：现代渐变 + 毛玻璃 + 圆角卡片
   支持暗色模式 / 响应式 / 动画
   ============================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 亮色模式 */
  --bg-light: #f9fafb;
  --bg-card: #ffffff;
  --bg-soft: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --heading: #0f172a;
  --border: #e2e8f0;
  --accent: #f59e0b;
  --accent-strong: #d97706;
  --accent-soft: #fef3c7;
  --accent-contrast: #ffffff;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --gradient-hero: linear-gradient(135deg, #fef3c7 0%, #fde68a 50%, #fcd34d 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  --gradient-footer: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  --nav-bg: rgba(255, 255, 255, 0.85);
  --hover-bg: #f1f5f9;
  --code-bg: #f1f5f9;
  --tag-bg: #fef3c7;
  --tag-text: #92400e;
  --scrollbar-track: #f1f5f9;
  --scrollbar-thumb: #cbd5e1;
  --scrollbar-thumb-hover: #94a3b8;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
}

/* 暗色模式变量 */
html.dark {
  --bg-light: #0f172a;
  --bg-card: #1e293b;
  --bg-soft: #334155;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --heading: #f8fafc;
  --border: #334155;
  --accent: #fbbf24;
  --accent-strong: #f59e0b;
  --accent-soft: #1e293b;
  --accent-contrast: #1e293b;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --gradient-hero: linear-gradient(135deg, #1e293b 0%, #334155 50%, #0f172a 100%);
  --gradient-card: linear-gradient(145deg, #1e293b 0%, #273449 100%);
  --gradient-footer: linear-gradient(180deg, #020617 0%, #0f172a 100%);
  --nav-bg: rgba(15, 23, 42, 0.85);
  --hover-bg: #334155;
  --code-bg: #334155;
  --tag-bg: #334155;
  --tag-text: #fcd34d;
  --scrollbar-track: #1e293b;
  --scrollbar-thumb: #475569;
  --scrollbar-thumb-hover: #64748b;
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  background-clip: padding-box;
}

/* ---------- 通用排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  transition: color 0.3s ease;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--heading), var(--accent-strong));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  border-left: 4px solid var(--accent);
  padding-left: 1rem;
  margin: 2.5rem 0 1.5rem;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 1rem;
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 4px;
  opacity: 0.6;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.25rem 0 0.75rem;
}

h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1rem 0 0.5rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease, border-color 0.2s ease;
  border-bottom: 1px solid transparent;
}

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

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

.text-muted {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
  box-shadow: var(--shadow);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  gap: 1rem;
}

.logo {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--accent-strong);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s ease;
  border: none;
}

.logo:hover {
  transform: scale(1.02);
  border: none;
}

.logo svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.4rem 0.2rem;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-links a:hover {
  color: var(--accent-strong);
  border-bottom-color: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-soft);
  border-radius: 50px;
  padding: 0.25rem 0.25rem 0.25rem 1rem;
  border: 1px solid var(--border);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  padding: 0.4rem 0;
  width: 140px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box button {
  background: var(--accent);
  border: none;
  border-radius: 50px;
  padding: 0.45rem 1.1rem;
  color: var(--accent-contrast);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.search-box button:hover {
  background: var(--accent-strong);
  transform: scale(1.03);
}

/* 主题切换 & 菜单按钮 */
.theme-toggle,
.menu-toggle {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: var(--hover-bg);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.6rem 0.5rem;
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

.mobile-menu a:hover {
  background: var(--hover-bg);
}

/* ---------- 主视觉 Hero ---------- */
.hero {
  background: var(--gradient-hero);
  padding: 4.5rem 0 5rem;
  position: relative;
  overflow: hidden;
  border-radius: 0 0 50px 50px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(217,119,6,0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: 1.25rem;
  max-width: 800px;
}

.hero p {
  font-size: 1.15rem;
  max-width: 700px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero .btn-primary {
  font-size: 1rem;
  padding: 0.9rem 2.2rem;
}

/* ---------- 按钮 ---------- */
.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
  background: var(--accent-strong);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent-strong);
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--accent-contrast);
  transform: translateY(-2px);
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin: 2rem 0;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.card:hover::before {
  opacity: 1;
}

/* ---------- 文章卡片 ---------- */
.article-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.article-card h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  transition: color 0.2s ease;
}

.article-card:hover h4 {
  color: var(--accent-strong);
}

.meta-info {
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.faq-question {
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 1.05rem;
  user-select: none;
}

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--accent-strong);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  margin-top: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
  animation: fadeIn 0.3s ease;
}

.faq-answer.open {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- HowTo ---------- */
.howto-step {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
  position: relative;
  padding-left: 3.5rem;
}

.howto-step::before {
  content: attr(data-step);
  position: absolute;
  left: 1.25rem;
  top: 1.5rem;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--accent);
  color: var(--accent-contrast);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.howto-step:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin: 1.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-soft);
  color: var(--heading);
  font-weight: 600;
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: var(--hover-bg);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.2rem 0.75rem;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 500;
  margin: 0.25rem 0.25rem 0.25rem 0;
}

/* ---------- 引用块 ---------- */
blockquote {
  border-left: 4px solid var(--accent);
  padding: 1rem 1.5rem;
  background: var(--bg-soft);
  border-radius: 0 12px 12px 0;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* ---------- 代码块 ---------- */
code {
  background: var(--code-bg);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.9em;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
}

pre {
  background: var(--code-bg);
  padding: 1.25rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
}

pre code {
  background: none;
  padding: 0;
}

/* ---------- 分隔线 ---------- */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 2.5rem 0;
  border: none;
}

/* ---------- 页脚 ---------- */
footer {
  background: var(--gradient-footer);
  color: var(--text-secondary);
  padding: 3.5rem 0 2rem;
  margin-top: 4rem;
  position: relative;
}

footer h4 {
  color: var(--heading);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease;
  border: none;
}

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

.copyright {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.8;
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  border-radius: 50px;
  padding: 0.7rem 1.3rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-hover);
  z-index: 999;
  transition: all 0.3s ease;
  font-size: 0.9rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-strong);
  transform: translateY(-3px);
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 延迟动画 */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }

/* ---------- 工具类 ---------- */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }
.p-5 { padding: 3rem; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .nav-links {
    gap: 1.25rem;
  }
  
  .search-box input {
    width: 100px;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .menu-toggle {
    display: inline-flex;
  }
  
  .search-box {
    display: none;
  }
  
  .hero {
    padding: 3rem 0 3.5rem;
    border-radius: 0 0 30px 30px;
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  
  .howto-step {
    padding-left: 3rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.75rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .card {
    padding: 1.25rem;
    border-radius: 16px;
  }
  
  .theme-toggle {
    padding: 0.35rem 0.7rem;
    font-size: 0.85rem;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .navbar,
  .back-to-top,
  .footer-col a,
  .theme-toggle,
  .menu-toggle,
  .search-box {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    max-width: 100%;
  }
  
  .card,
  .article-card,
  .faq-item,
  .howto-step {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}

/* ---------- 无障碍 ---------- */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 暗色模式微调 ---------- */
html.dark .card::before {
  background: linear-gradient(90deg, var(--accent), transparent);
}

html.dark .logo {
  color: var(--accent);
}

html.dark .hero h1 {
  background: linear-gradient(135deg, #f8fafc, #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

html.dark .search-box button {
  background: var(--accent);
  color: var(--accent-contrast);
}

html.dark .back-to-top {
  background: var(--accent);
  color: var(--accent-contrast);
}

html.dark footer .copyright {
  border-top-color: rgba(255,255,255,0.08);
}
```