/* ========== 奇热漫画 全站样式表 ========== */
/* 主题变量 */
:root {
  --primary: #b3541e;
  --primary-light: #d47a3a;
  --accent: #f5c518;
  --accent-dark: #e0b012;
  --bg: #faf9f8;
  --bg-alt: #f4f1ed;
  --surface: #ffffff;
  --text: #222222;
  --text-muted: #555555;
  --text-light: #888888;
  --border: #e5e5e5;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 64px;
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}

/* 暗色模式变量 */
body.dark {
  --primary: #e07b3a;
  --primary-light: #f09660;
  --accent: #f5c518;
  --accent-dark: #e0b012;
  --bg: #121212;
  --bg-alt: #1a1a1a;
  --surface: #1e1e1e;
  --text: #e8e8e8;
  --text-muted: #aaaaaa;
  --text-light: #777777;
  --border: #333333;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

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

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

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-light);
}

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

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

input,
textarea {
  font-family: inherit;
  font-size: 14px;
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
  opacity: 0.7;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

/* ========== 通用工具类 ========== */
.text-center {
  text-align: center;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

.hidden {
  display: none !important;
}

/* ========== 吸顶导航栏 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.92);
  transition: box-shadow 0.3s ease, background 0.4s ease;
}

body.dark .site-header {
  background: rgba(30, 30, 30, 0.92);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  gap: 20px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.03);
}

.menu {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
}

.menu a {
  font-weight: 500;
  color: var(--text);
  position: relative;
  padding: 6px 0;
  transition: color 0.3s ease;
}

.menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.menu a:hover {
  color: var(--primary);
}

.menu a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.search-box {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
  background: var(--surface);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(179, 84, 30, 0.1);
}

.search-box input {
  border: none;
  padding: 8px 16px;
  width: 180px;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 14px;
}

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

.search-box button {
  background: var(--primary);
  border: none;
  color: white;
  padding: 0 16px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.3s ease;
}

.search-box button:hover {
  background: var(--primary-light);
}

.dark-toggle {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 4px;
}

.dark-toggle:hover {
  border-color: var(--primary);
  transform: rotate(15deg);
}

.mobile-menu-btn {
  display: none;
  font-size: 1.6rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  line-height: 1;
  padding: 4px;
}

/* 移动端菜单展开状态 */
.menu.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--surface);
  padding: 16px 24px;
  gap: 16px;
  box-shadow: var(--shadow-md);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  z-index: 999;
  animation: slideDown 0.3s ease;
}

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

/* ========== Hero Banner ========== */
.hero {
  background: linear-gradient(135deg, #2b1a0e 0%, #4a2c1a 50%, #6b3a20 100%);
  color: #f5d9b8;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245, 197, 24, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(179, 84, 30, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 20px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.5px;
  animation: fadeInUp 0.8s ease;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  margin-bottom: 30px;
  opacity: 0.9;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.15s backwards;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #1a1a1a;
  padding: 14px 36px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(245, 197, 24, 0.3);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.8s ease 0.3s backwards;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.btn:hover {
  background: var(--accent-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(245, 197, 24, 0.4);
  color: #1a1a1a;
}

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

.hero-img {
  animation: fadeInRight 0.8s ease;
}

.hero-img svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: transform 0.3s ease;
}

.hero-img svg:hover {
  transform: scale(1.02) rotate(1deg);
}

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

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

/* ========== 通用 Section 样式 ========== */
.section {
  padding: 80px 0;
  position: relative;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  font-weight: 700;
  color: var(--text);
}

.section-title::after {
  content: "";
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin: 12px auto;
  border-radius: 2px;
}

/* ========== 卡片网格 ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

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

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--text);
  font-weight: 600;
}

.card p {
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== 文章列表 ========== */
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-top: 30px;
}

.article-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.article-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

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

.article-item h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--text);
  transition: color 0.3s ease;
}

.article-item:hover h3 {
  color: var(--primary);
}

.article-item time {
  color: var(--text-light);
  font-size: 0.85rem;
  display: block;
  margin-bottom: 8px;
}

.article-item p {
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.7;
}

.article-item a {
  font-weight: 600;
  font-size: 0.9rem;
  position: relative;
}

.article-item a::after {
  content: " →";
  transition: margin-left 0.3s ease;
}

.article-item a:hover::after {
  margin-left: 6px;
}

/* ========== FAQ 样式 ========== */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-list details {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 20px 28px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  cursor: pointer;
}

.faq-list details:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.faq-list summary {
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 30px;
  color: var(--text);
  transition: color 0.3s ease;
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-list details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-list details[open] {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.faq-list details p {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  line-height: 1.8;
}

/* ========== HowTo 样式 ========== */
.howto-box {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}

.howto-box:hover {
  box-shadow: var(--shadow-md);
}

.howto-box h3 {
  color: var(--text);
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.howto-box ol {
  margin-left: 20px;
  margin-bottom: 20px;
  padding-left: 10px;
}

.howto-box ol li {
  margin-bottom: 10px;
  color: var(--text-muted);
  line-height: 1.8;
  position: relative;
  padding-left: 8px;
}

.howto-box ol li strong {
  color: var(--text);
}

.howto-box p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 10px;
}

.howto-box p strong {
  color: var(--text);
}

/* ========== 页脚 ========== */
.site-footer {
  background: #1a1a1a;
  color: #aaa;
  padding: 60px 0 30px;
  position: relative;
}

body.dark .site-footer {
  background: #0d0d0d;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 30px;
}

.footer-grid h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 8px;
}

.footer-grid h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--accent);
}

.footer-grid a {
  color: #ccc;
  transition: color 0.3s ease;
  margin: 0 4px;
}

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

.footer-grid span {
  color: #ccc;
}

.copyright {
  border-top: 1px solid #333;
  margin-top: 30px;
  padding-top: 20px;
  text-align: center;
  color: #888;
  font-size: 0.9rem;
}

.copyright p {
  margin-bottom: 6px;
}

/* ========== 返回顶部按钮 ========== */
#backTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
  cursor: pointer;
  display: none;
  z-index: 99;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(20px);
}

#backTop.show {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

#backTop:hover {
  background: var(--primary-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== 响应式媒体查询 ========== */
@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }

  .hero-grid {
    grid-template-columns: 1fr 0.9fr;
  }
}

@media (max-width: 992px) {
  .container {
    max-width: 720px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
  }

  .hero-img {
    max-width: 600px;
    margin: 0 auto;
  }

  .menu {
    gap: 20px;
  }

  .search-box input {
    width: 140px;
  }

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

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

@media (max-width: 768px) {
  .nav-wrap {
    height: 56px;
  }

  .menu {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .search-box {
    display: none;
  }

  .dark-toggle {
    padding: 5px 10px;
    font-size: 14px;
  }

  .hero {
    padding: 50px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section {
    padding: 50px 0;
  }

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

  .article-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .footer-grid h4::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .howto-box {
    padding: 24px;
  }

  #backTop {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }

  .logo {
    font-size: 1.5rem;
  }

  .btn {
    padding: 12px 28px;
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .card {
    padding: 20px;
  }

  .article-item {
    padding: 20px;
  }

  .faq-list details {
    padding: 16px 20px;
  }

  .howto-box {
    padding: 20px;
  }

  .copyright {
    font-size: 0.8rem;
  }
}

/* ========== 打印样式 ========== */
@media print {
  .site-header,
  .site-footer,
  #backTop,
  .dark-toggle,
  .mobile-menu-btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card,
  .article-item,
  .howto-box {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ========== 无障碍访问 ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* 焦点可见性 */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ========== 高亮选中文本 ========== */
::selection {
  background: var(--accent);
  color: #1a1a1a;
}

/* ========== 暗色模式下的额外调整 ========== */
body.dark .hero {
  background: linear-gradient(135deg, #1a0f08 0%, #2e1a0e 50%, #442310 100%);
}

body.dark .search-box {
  background: var(--surface);
}

body.dark .menu a {
  color: var(--text);
}

body.dark .menu.open {
  background: var(--surface);
}

body.dark .article-item time {
  color: var(--text-light);
}

/* ========== 鼠标悬停时的细节效果 ========== */
.card-grid .card:nth-child(odd):hover {
  transform: translateY(-6px) rotate(-0.5deg);
}

.card-grid .card:nth-child(even):hover {
  transform: translateY(-6px) rotate(0.5deg);
}

/* ========== 品牌区特殊样式 ========== */
#brand .card-grid {
  margin-top: 40px;
}

#brand .card {
  text-align: center;
  padding: 30px 24px;
}

#brand .card h3 {
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

#brand .card h3::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background: var(--accent);
}

/* ========== 解决方案区域 ========== */
#brand + .section .container > div:last-child {
  position: relative;
  overflow: hidden;
}

#brand + .section .container > div:last-child::before {
  content: "IP";
  position: absolute;
  right: -20px;
  bottom: -30px;
  font-size: 8rem;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.05;
  pointer-events: none;
}

/* ========== 评价卡片 ========== */
#contact + .section .card {
  text-align: center;
  font-style: italic;
  position: relative;
}

#contact + .section .card::before {
  content: """;
  font-size: 4rem;
  position: absolute;
  top: -10px;
  left: 20px;
  color: var(--primary);
  opacity: 0.2;
  font-family: Georgia, serif;
}

/* ========== 联系我们的样式 ========== */
#contact .container {
  max-width: 700px;
}

#contact p {
  margin-bottom: 12px;
  font-size: 1.05rem;
}

#contact p strong {
  color: var(--primary);
  margin-right: 8px;
}

/* ========== 页面加载时的淡入效果 ========== */
@keyframes pageLoad {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

body {
  animation: pageLoad 0.5s ease;
}

/* ========== 移动端菜单动画 ========== */
@keyframes menuFadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.menu.open {
  animation: menuFadeIn 0.3s ease;
}

/* ========== 悬浮卡片的光泽效果 ========== */
.card,
.article-item {
  position: relative;
  overflow: hidden;
}

.card::after,
.article-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.06), transparent);
  transition: left 0.6s ease;
  pointer-events: none;
  z-index: 1;
}

.card:hover::after,
.article-item:hover::after {
  left: 150%;
}

/* ========== 背景纹理 ========== */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(179, 84, 30, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: -1;
}

/* ========== 响应式字体 ========== */
html {
  font-size: 16px;
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
}

/* ========== 性能优化：使用 transform 和 opacity 做动画 ========== */
.card,
.article-item,
.btn,
.dark-toggle,
.menu a::after,
.faq-list summary::after {
  will-change: transform, opacity;
}

/* ========== 结束 ========== */