```css
/* ===== 红桃视频 · 全站样式 ===== */
/* ===== 主题变量 ===== */
:root {
  --bg: #fff8f0;
  --bg-soft: #fdeee2;
  --card-bg: #ffffff;
  --heading: #3d2b1f;
  --body-text: #4a3728;
  --muted-text: #7a6a5c;
  --brand: #e05d3c;
  --brand-dark: #c04a2e;
  --border: #e8d9cc;
  --nav-bg: rgba(255, 248, 240, 0.85);
  --footer-bg: #2b1f16;
  --footer-text: #e8ddd4;
  --footer-heading: #ffffff;
  --btn-text: #ffffff;
  --shadow: 0 8px 30px rgba(224, 93, 60, 0.12);
  --code-bg: #fff3e8;
  --gradient-hero: linear-gradient(135deg, #ffd6b8 0%, #ffb08a 50%, #ff8e6e 100%);
  --gradient-btn: linear-gradient(135deg, #e05d3c, #f27649);
  --gradient-card: linear-gradient(145deg, #fff, #fff5ed);
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.7);
}

[data-theme="dark"] {
  --bg: #1a1210;
  --bg-soft: #2a1d16;
  --card-bg: #2a1f1a;
  --heading: #f5e9e2;
  --body-text: #d4c5ba;
  --muted-text: #a69286;
  --brand: #ff7b5c;
  --brand-dark: #e05d3c;
  --border: #4a382c;
  --nav-bg: rgba(26, 18, 16, 0.88);
  --footer-bg: #0f0906;
  --footer-text: #c0b0a4;
  --footer-heading: #fff;
  --btn-text: #fff;
  --shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
  --code-bg: #36281f;
  --gradient-hero: linear-gradient(135deg, #3a2518, #5c3a24, #7a4a2e);
  --gradient-btn: linear-gradient(135deg, #e05d3c, #b84326);
  --gradient-card: linear-gradient(145deg, #2a1f1a, #33251d);
  --glass-bg: rgba(42, 31, 26, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
}

/* ===== 重置与基础 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--body-text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  line-height: 1.75;
  transition: background-color 0.4s ease, color 0.3s ease;
  overflow-x: hidden;
  background-image: radial-gradient(circle at 10% 20%, rgba(224, 93, 60, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(255, 176, 138, 0.05) 0%, transparent 35%);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
  color: var(--body-text);
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: all 0.25s ease;
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--brand-dark);
  border-bottom-color: var(--brand);
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== 玻璃拟态通用 ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
}

/* ===== 头部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
  transition: all 0.4s;
}

.site-header.scrolled {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
  gap: 1rem;
}

.logo a {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--heading);
  border: none;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.03em;
  transition: all 0.3s;
}

.logo a:hover {
  transform: scale(1.03);
  filter: drop-shadow(0 4px 12px rgba(224, 93, 60, 0.3));
}

.logo span {
  font-weight: 900;
}

.main-nav ul {
  display: flex;
  gap: 0.5rem;
  list-style: none;
  flex-wrap: wrap;
  justify-content: center;
}

.main-nav a {
  color: var(--body-text);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 30px;
  border: none;
  font-size: 0.95rem;
  transition: all 0.3s;
  position: relative;
}

.main-nav a:hover {
  color: var(--brand);
  background: rgba(224, 93, 60, 0.08);
  transform: translateY(-1px);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.main-nav a:hover::after {
  width: 60%;
}

.action-buttons {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.search-icon, .theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0.5rem 1.2rem;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--body-text);
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.search-icon:hover, .theme-toggle:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 93, 60, 0.15);
}

.theme-toggle {
  width: 44px;
  padding: 0.5rem;
  justify-content: center;
  font-size: 1.2rem;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--heading);
  line-height: 1;
  padding: 0.2rem;
  transition: transform 0.3s;
}

.mobile-menu-btn:hover {
  transform: rotate(90deg);
}

/* 移动菜单 */
.mobile-menu {
  display: none;
  background: var(--card-bg);
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
  animation: slideDown 0.3s ease;
}

.mobile-menu a {
  display: block;
  padding: 0.9rem 0.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--body-text);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu a:hover {
  color: var(--brand);
  padding-left: 1rem;
  background: rgba(224, 93, 60, 0.04);
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  background: var(--gradient-btn);
  color: #fff;
  font-weight: 600;
  padding: 0.9rem 2.2rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  font-size: 1rem;
  box-shadow: 0 8px 25px rgba(224, 93, 60, 0.25);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.02em;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(224, 93, 60, 0.35);
  color: #fff;
  border-color: transparent;
}

.btn:hover::before {
  left: 100%;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--brand);
  color: var(--brand);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 25px rgba(224, 93, 60, 0.3);
}

.btn:active {
  transform: translateY(-1px) scale(0.98);
}

/* ===== Hero 区域 ===== */
.hero {
  padding: 4rem 0 5rem;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 60%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 3rem;
  position: relative;
  z-index: 2;
}

.hero-text {
  flex: 1.2;
  animation: fadeInUp 1s ease;
}

.hero-text h1 {
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  font-weight: 900;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, #3d2b1f, #7a4a2e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  text-shadow: none;
}

[data-theme="dark"] .hero-text h1 {
  background: linear-gradient(135deg, #fff, #ffd6c0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-text p {
  font-size: 1.2rem;
  color: #5c3a24;
  margin-bottom: 2rem;
  max-width: 600px;
  line-height: 1.8;
}

[data-theme="dark"] .hero-text p {
  color: #d4c5ba;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-media {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: float 6s ease-in-out infinite;
}

.hero-media svg {
  width: 100%;
  max-width: 480px;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.15));
  border-radius: 24px;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 轮播 ===== */
.carousel {
  background: var(--gradient-card);
  border-radius: 28px;
  padding: 2.5rem;
  box-shadow: var(--shadow);
  margin: 2.5rem 0;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  transition: transform 0.4s;
}

.carousel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-btn);
  border-radius: 4px 4px 0 0;
}

.carousel:hover {
  transform: translateY(-4px);
}

.slide-item {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: 120px;
}

.slide-text {
  flex: 2;
}

.slide-text h3 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  color: var(--heading);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.slide-text p {
  font-size: 1.05rem;
  color: var(--body-text);
  margin-bottom: 0;
}

.slide-media {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--bg-soft);
  border-radius: 16px;
  padding: 1rem;
  min-width: 150px;
}

.slide-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.8rem;
}

.slide-controls button {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 0.7rem 1.8rem;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  color: var(--body-text);
  transition: all 0.3s;
  font-size: 0.95rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.slide-controls button:hover {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 93, 60, 0.25);
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2.5rem 0;
}

.card {
  background: var(--gradient-card);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(224, 93, 60, 0.03) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.4s;
}

.card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 20px 50px rgba(224, 93, 60, 0.12);
  border-color: rgba(224, 93, 60, 0.3);
}

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

.card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--heading);
  position: relative;
}

.card h4 {
  color: var(--heading);
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
  position: relative;
}

.card p {
  color: var(--body-text);
  position: relative;
  font-size: 0.98rem;
}

.card a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 500;
  margin-top: 0.5rem;
}

.card a::after {
  content: '→';
  transition: transform 0.3s;
}

.card a:hover::after {
  transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all 0.3s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.faq-item:hover {
  border-color: rgba(224, 93, 60, 0.3);
  box-shadow: 0 4px 15px rgba(224, 93, 60, 0.08);
}

.faq-q {
  padding: 1.2rem 1.5rem;
  font-weight: 600;
  color: var(--heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  transition: all 0.3s;
  user-select: none;
}

.faq-q:hover {
  background: rgba(224, 93, 60, 0.04);
}

.faq-q span {
  font-size: 1.4rem;
  transition: transform 0.3s;
  color: var(--brand);
  flex-shrink: 0;
  margin-left: 1rem;
}

.faq-item.active .faq-q span {
  transform: rotate(180deg);
}

.faq-a {
  color: var(--body-text);
  padding: 0 1.5rem 1.2rem;
  line-height: 1.8;
  font-size: 0.98rem;
  border-top: 1px dashed var(--border);
  margin-top: 0.5rem;
  padding-top: 0.8rem;
}

/* ===== 引用块 ===== */
blockquote {
  border-left: 4px solid var(--brand);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  background: var(--bg-soft);
  border-radius: 0 16px 16px 0;
  font-style: italic;
  color: var(--body-text);
  font-size: 1.1rem;
  position: relative;
  box-shadow: var(--shadow);
}

blockquote::before {
  content: '"';
  position: absolute;
  top: -10px;
  left: 15px;
  font-size: 4rem;
  color: var(--brand);
  opacity: 0.2;
  font-family: Georgia, serif;
}

/* ===== 表格 ===== */
.table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
}

th, td {
  padding: 1rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  color: var(--body-text);
}

th {
  background: var(--bg-soft);
  color: var(--heading);
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

tr:hover td {
  background: rgba(224, 93, 60, 0.02);
}

/* ===== 代码块 ===== */
pre, code {
  background: var(--code-bg);
  border-radius: 8px;
  font-family: "SF Mono", "Fira Code", monospace;
}

pre {
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
}

code {
  padding: 0.2rem 0.4rem;
  font-size: 0.9em;
}

/* ===== 评论/留言 ===== */
.comment-box {
  background: var(--bg-soft);
  padding: 2rem;
  border-radius: 20px;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 4rem 0 0;
  margin-top: 5rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-btn);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem 3rem;
}

.footer-grid h4 {
  color: var(--footer-heading);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 0.8rem;
}

.footer-grid h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.footer-grid p {
  color: var(--footer-text);
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-grid a {
  color: var(--footer-text);
  display: block;
  padding: 0.4rem 0;
  font-size: 0.95rem;
  border: none;
  transition: all 0.3s;
}

.footer-grid a:hover {
  color: #fff;
  padding-left: 0.5rem;
}

.footer-bottom {
  background: rgba(0, 0, 0, 0.2);
  text-align: center;
  padding: 1.5rem;
  color: var(--footer-text);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
  margin-bottom: 0;
  color: var(--footer-text);
}

/* ===== 返回顶部 ===== */
.back-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--gradient-btn);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 1000;
  box-shadow: 0 8px 25px rgba(224, 93, 60, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

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

.back-top:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 12px 35px rgba(224, 93, 60, 0.4);
}

/* ===== 工具类 ===== */
.text-muted { color: var(--muted-text); }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.text-center { text-align: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ===== 分区标题 ===== */
.section-title {
  text-align: center;
  margin: 3rem 0 2rem;
  position: relative;
}

.section-title h2 {
  display: inline-block;
  padding: 0 1rem;
  position: relative;
  background: linear-gradient(135deg, var(--heading), var(--brand));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
  
  .hero-text p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-media {
    order: -1;
  }
  
  .hero-media svg {
    max-width: 350px;
  }
}

@media (max-width: 900px) {
  .main-nav ul {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .header-inner {
    padding: 0.8rem 1rem;
  }
  
  .logo a {
    font-size: 1.6rem;
  }
  
  .search-icon span {
    display: none;
  }
  
  .search-icon {
    padding: 0.5rem;
    width: 44px;
    justify-content: center;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .slide-item {
    flex-direction: column;
    text-align: center;
  }
  
  .slide-media {
    width: 100%;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 1rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  
  .hero {
    padding: 3rem 0;
  }
  
  .hero-text h1 {
    font-size: 2.2rem;
  }
  
  .hero-text p {
    font-size: 1rem;
  }
  
  .btn {
    padding: 0.8rem 1.5rem;
    font-size: 0.9rem;
    width: 100%;
    text-align: center;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .carousel {
    padding: 1.5rem;
  }
  
  .slide-controls button {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-grid h4::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .back-top {
    bottom: 1rem;
    right: 1rem;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
  
  .action-buttons {
    gap: 0.3rem;
  }
  
  .header-inner {
    gap: 0.5rem;
    flex-wrap: wrap;
  }
}

/* ===== 无障碍与焦点 ===== */
:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== 自定义滚动条 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-soft);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand), var(--brand-dark));
  border-radius: 10px;
  border: 2px solid var(--bg-soft);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brand-dark);
}

/* ===== 文章卡片特殊样式 ===== */
article.card {
  display: flex;
  flex-direction: column;
}

article.card .date-tag {
  font-size: 0.85rem;
  color: var(--muted-text);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===== 搜索框（如需要） ===== */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.search-overlay.active {
  display: flex;
}

.search-box {
  background: var(--card-bg);
  border-radius: 24px;
  padding: 2rem;
  width: 100%;
  max-width: 600px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.search-box input {
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid var(--border);
  border-radius: 50px;
  font-size: 1.1rem;
  background: var(--bg);
  color: var(--body-text);
  transition: border-color 0.3s;
}

.search-box input:focus {
  outline: none;
  border-color: var(--brand);
}

/* ===== 打印样式 ===== */
@media print {
  .site-header, .site-footer, .back-top, .slide-controls, .hero-media {
    display: none !important;
  }
  
  body {
    background: #fff;
    color: #000;
  }
  
  .card, .carousel {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}
```