/* 亲亲漫画 - 完整样式表 */
/* 全局变量与主题系统 */
:root {
  --bg-light: #F9F7F1;
  --bg-card: #FFFFFF;
  --text-primary: #1F2A3A;
  --text-secondary: #2C3E50;
  --text-heading: #0F1A2C;
  --text-link: #0B4F6C;
  --text-accent: #1C3D5A;
  --border-color: #D8D2C4;
  --nav-bg: #FFFFFF;
  --footer-bg: #1E2B39;
  --footer-text: #E2E8F0;
  --btn-bg: #1A3A5F;
  --btn-text: #FFFFFF;
  --shadow: 0 8px 20px rgba(0,0,0,0.05);
  --dark-bg: #121A24;
  --dark-card: #1E2836;
  --dark-text: #E2E8F0;
  --dark-heading: #FFFFFF;
  --dark-secondary: #CBD5E1;
  --dark-border: #334155;
  --gradient-primary: linear-gradient(135deg, #1A3A5F 0%, #2D5A87 50%, #4A7BA6 100%);
  --gradient-hero: linear-gradient(rgba(20, 40, 60, 0.75), rgba(20, 40, 60, 0.75));
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --font-scale: 1;
}

[data-theme="dark"] {
  --bg-light: #0F172A;
  --bg-card: #1E293B;
  --text-primary: #E2E8F0;
  --text-secondary: #94A3B8;
  --text-heading: #F8FAFC;
  --text-link: #93C5FD;
  --text-accent: #60A5FA;
  --border-color: #334155;
  --nav-bg: rgba(30, 41, 59, 0.85);
  --footer-bg: #0B1120;
  --footer-text: #E2E8F0;
  --btn-bg: #3B82F6;
  --btn-text: #FFFFFF;
  --shadow: 0 8px 20px rgba(0,0,0,0.3);
  --gradient-primary: linear-gradient(135deg, #1E3A5F 0%, #2D5A87 50%, #4A7BA6 100%);
  --gradient-hero: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
  --glass-bg: rgba(30, 41, 59, 0.75);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-size: calc(16px * var(--font-scale));
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

a:hover {
  color: var(--text-accent);
  text-decoration: none;
}

a:focus-visible {
  outline: 2px solid var(--text-accent);
  outline-offset: 4px;
  border-radius: 4px;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 0.5em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  margin: 2.5rem 0 1.25rem;
  position: relative;
  padding-left: 1.2rem;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 5px;
  border-radius: 3px;
  background: var(--gradient-primary);
}

h3 {
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
}

h4 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1rem 0 0.5rem;
}

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

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
}

strong {
  font-weight: 600;
  color: var(--text-heading);
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  font-size: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-primary);
}

::selection {
  background: var(--text-accent);
  color: #fff;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 40px);
}

main {
  flex: 1 0 auto;
  padding-bottom: 3rem;
}

/* 导航栏 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
  background: var(--nav-bg);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 1rem;
}

.brand {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
  transition: transform var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.brand::before {
  content: '';
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient-primary);
  display: inline-block;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(26, 58, 95, 0.3);
}

.brand span {
  color: var(--text-accent);
  font-weight: 800;
}

.brand:hover {
  transform: translateY(-1px);
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  align-items: center;
  margin-left: auto;
  margin-right: 1.5rem;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  border-bottom: none;
  transition: all var(--transition-fast);
  opacity: 0.85;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--text-accent);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-links a:hover {
  opacity: 1;
  color: var(--text-accent);
  background: color-mix(in srgb, var(--text-accent) 8%, transparent);
}

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

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: 50px;
  padding: 0.35rem 0.5rem 0.35rem 1rem;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.search-box:focus-within {
  border-color: var(--text-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--text-accent) 15%, transparent);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 0.35rem 0.5rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  width: 160px;
  transition: width var(--transition-normal);
}

.search-box input:focus {
  width: 200px;
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.search-box .icon-btn {
  font-size: 1.1rem;
  padding: 0.4rem;
  border-radius: 50%;
  background: var(--text-accent);
  color: #fff;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.search-box .icon-btn:hover {
  transform: scale(1.05);
  background: var(--text-accent);
}

.icon-btn {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--text-primary);
  padding: 0.5rem;
  line-height: 1;
  border-radius: 12px;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  position: relative;
}

.icon-btn:hover {
  background: color-mix(in srgb, var(--text-accent) 10%, transparent);
  transform: translateY(-2px);
}

.icon-btn:active {
  transform: translateY(0) scale(0.95);
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
}

/* Hero 区域 */
.hero {
  position: relative;
  background: var(--gradient-hero), 
    url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 400"%3E%3Crect width="1200" height="400" fill="%231A3A5F"/%3E%3Cpath d="M0 250 Q300 150 600 250 T1200 250 V400 H0 Z" fill="%23234A6F" opacity="0.6"/%3E%3C/svg%3E') center/cover no-repeat;
  color: white;
  padding: clamp(3rem, 8vw, 5rem) 0;
  margin-bottom: 2.5rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: float-pulse 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes float-pulse {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
  50% { transform: translate(-20px, 20px) scale(1.1); opacity: 0.8; }
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: #FFFFFF;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  margin-bottom: 1rem;
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  color: rgba(255, 255, 255, 0.95);
  font-size: clamp(1rem, 2vw, 1.2rem);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.3);
  margin-bottom: 1.75rem;
  max-width: 600px;
  line-height: 1.7;
  animation: fadeInUp 0.8s ease-out 0.1s backwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn-primary {
  background: linear-gradient(135deg, #FFD700 0%, #FFA500 50%, #FF8C00 100%);
  color: #1A3A5F;
  padding: 0.85rem 2.2rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 15px rgba(255, 165, 0, 0.3);
  text-decoration: none;
  letter-spacing: 0.02em;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.btn-primary::after {
  content: '→';
  font-size: 1.2em;
  transition: transform var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 165, 0, 0.4);
  color: #1A3A5F;
}

.btn-primary:hover::after {
  transform: translateX(5px);
}

.btn-primary:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(255, 165, 0, 0.3);
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
  border-color: color-mix(in srgb, var(--text-accent) 30%, var(--border-color));
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  margin-top: 0;
  font-size: 1.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h4 {
  color: var(--text-heading);
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}

.card p {
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.card .meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.8;
  font-weight: 500;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--border-color);
}

/* 文章列表 */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: 1.75rem;
  margin: 2rem 0;
}

.article-item {
  background: var(--bg-card);
  padding: 1.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  min-height: 200px;
}

.article-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.article-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
  border-color: color-mix(in srgb, var(--text-accent) 25%, var(--border-color));
}

.article-item:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.article-item time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.article-item time::before {
  content: '📅';
  font-size: 0.9em;
}

.article-item h3 {
  margin: 0.5rem 0;
  font-size: 1.2rem;
  line-height: 1.4;
  flex-grow: 1;
}

.article-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.article-item a {
  align-self: flex-start;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: none;
}

.article-item a::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.article-item a:hover::after {
  transform: translateX(5px);
}

/* FAQ 样式 */
.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 0;
  transition: background-color var(--transition-fast);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  color: var(--text-heading);
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
  user-select: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.faq-question:hover {
  color: var(--text-accent);
}

.faq-question span {
  font-size: 1.5rem;
  font-weight: 400;
  transition: transform var(--transition-normal);
  color: var(--text-accent);
  line-height: 1;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--text-accent) 10%, transparent);
}

.faq-question.active span {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0.75rem 0 0;
  color: var(--text-primary);
  display: none;
  animation: fadeInUp 0.3s ease-out;
  line-height: 1.7;
}

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

/* 教程 / HowTo 区域 */
.howto-container {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  transition: all var(--transition-normal);
}

.howto-container:hover {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.howto-container ol {
  padding-left: 1.75rem;
  margin: 1.5rem 0;
  counter-reset: steps;
}

.howto-container li {
  padding: 0.5rem 0;
  line-height: 1.7;
  position: relative;
  counter-increment: steps;
}

.howto-container li::marker {
  color: var(--text-accent);
  font-weight: 700;
}

.howto-container strong {
  color: var(--text-heading);
}

/* 联系区域 */
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2rem);
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.contact-card p {
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.contact-card p strong {
  min-width: 70px;
  display: inline-block;
}

.contact-card p::before {
  font-size: 1.2rem;
  line-height: 1;
}

.contact-card p:nth-child(1)::before { content: '📍'; }
.contact-card p:nth-child(2)::before { content: '📞'; }
.contact-card p:nth-child(3)::before { content: '✉️'; }
.contact-card p:nth-child(4)::before { content: '🕘'; }

/* Footer */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: clamp(2.5rem, 6vw, 4rem) 0 2rem;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
}

.footer a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-fast), opacity var(--transition-fast);
  border-bottom: none;
  font-size: 0.9rem;
}

.footer a:hover {
  color: #FFFFFF;
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer .footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: 2rem;
}

.footer h4 {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
}

.footer .footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  margin-top: 2rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* 返回顶部按钮 */
#backTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--btn-bg);
  color: white;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
  display: none;
  cursor: pointer;
  z-index: 999;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast);
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px);
}

#backTop.visible {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

#backTop:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  animation: none;
}

#backTop:active {
  transform: translateY(0) scale(0.95);
}

/* 滚动动画 */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* 移动端菜单 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--nav-bg);
  padding: 1rem;
  z-index: 999;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.mobile-menu.active {
  display: block;
  animation: fadeInDown 0.3s ease-out;
}

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

.mobile-menu a {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  border-bottom: none;
  transition: all var(--transition-fast);
}

.mobile-menu a:hover {
  background: color-mix(in srgb, var(--text-accent) 10%, transparent);
  padding-left: 1.25rem;
}

/* 友情链接样式 */
.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.quick-links a {
  color: var(--text-secondary);
  border-bottom: none;
  transition: all var(--transition-fast);
  padding: 0.25rem 0;
}

.quick-links a:hover {
  color: var(--text-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 暗色模式适配 */
[data-theme="dark"] {
  color-scheme: dark;
}

[data-theme="dark"] .card,
[data-theme="dark"] .article-item,
[data-theme="dark"] .howto-container,
[data-theme="dark"] .contact-card {
  background: var(--dark-card);
  border-color: var(--dark-border);
}

[data-theme="dark"] .search-box {
  background: var(--dark-card);
  border-color: var(--dark-border);
}

[data-theme="dark"] .search-box input {
  color: var(--dark-text);
}

[data-theme="dark"] .search-box input::placeholder {
  color: var(--dark-secondary);
}

[data-theme="dark"] .faq-item {
  border-bottom-color: var(--dark-border);
}

[data-theme="dark"] .quick-links {
  border-top-color: var(--dark-border);
}

[data-theme="dark"] .card .meta {
  border-top-color: var(--dark-border);
  color: var(--dark-secondary);
}

[data-theme="dark"] .hero {
  background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
    url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 400"%3E%3Crect width="1200" height="400" fill="%230F1A2C"/%3E%3Cpath d="M0 250 Q300 150 600 250 T1200 250 V400 H0 Z" fill="%231B2C44" opacity="0.6"/%3E%3C/svg%3E') center/cover;
}

/* 移动端响应式 */
@media (max-width: 1024px) {
  .nav-links {
    gap: 0.15rem;
  }
  
  .nav-links a {
    padding: 0.5rem 0.6rem;
    font-size: 0.9rem;
  }
  
  .search-box input {
    width: 130px;
  }
  
  .search-box input:focus {
    width: 160px;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  
  .nav-links {
    display: none;
  }
  
  .menu-toggle {
    display: inline-flex;
  }
  
  .search-box {
    display: none;
  }
  
  .nav-inner {
    height: 60px;
  }
  
  .brand {
    font-size: 1.4rem;
  }
  
  .brand::before {
    width: 30px;
    height: 30px;
  }
  
  .hero {
    padding: 2.5rem 0;
    margin-bottom: 1.5rem;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .card-grid,
  .article-list {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  
  h2 {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
  }
  
  h3 {
    font-size: 1.2rem;
  }
  
  .footer .footer-cols {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  
  .footer .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  #backTop {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 16px;
  }
  
  .footer .footer-cols {
    grid-template-columns: 1fr;
  }
  
  .hero {
    padding: 2rem 0;
  }
  
  .btn-primary {
    width: 100%;
    justify-content: center;
  }
  
  .card-grid,
  .article-list {
    grid-template-columns: 1fr;
  }
  
  .nav-actions {
    gap: 0.25rem;
  }
  
  .icon-btn {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }
}

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

@media (prefers-contrast: more) {
  :root {
    --text-primary: #000000;
    --text-secondary: #1a1a1a;
    --border-color: #000000;
  }
  
  [data-theme="dark"] {
    --text-primary: #FFFFFF;
    --text-secondary: #E0E0E0;
    --border-color: #FFFFFF;
  }
}

/* 聚焦可见性 */
:focus-visible {
  outline: 2px solid var(--text-accent);
  outline-offset: 3px;
}

/* 打印样式 */
@media print {
  .navbar,
  .footer,
  .search-box,
  .icon-btn,
  .menu-toggle,
  #backTop,
  .btn-primary {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  .card,
  .article-item,
  .howto-container {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
}