* {
  transition: background-color var(--transition-normal),
              color var(--transition-normal),
              border-color var(--transition-normal),
              box-shadow var(--transition-normal);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: none;
  overflow-x: hidden;
}

.main-content,
.sidebar {
  scroll-behavior: smooth;
}

.fade-in-up {
  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);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.post-card:nth-child(1) { animation-delay: 0.1s; }
.post-card:nth-child(2) { animation-delay: 0.2s; }
.post-card:nth-child(3) { animation-delay: 0.3s; }
.post-card:nth-child(4) { animation-delay: 0.4s; }

.widget:nth-child(1) { animation-delay: 0.1s; }
.widget:nth-child(2) { animation-delay: 0.2s; }
.widget:nth-child(3) { animation-delay: 0.3s; }
.widget:nth-child(4) { animation-delay: 0.4s; }
.widget:nth-child(5) { animation-delay: 0.5s; }

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--surface-color);
  border-radius: 0;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary-400), var(--primary-600));
  border-radius: 0;
  transition: all var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--primary-500), var(--primary-700));
  width: 8px;
}

html {
  scrollbar-width: thin;
  scrollbar-color: var(--primary-400) var(--surface-color);
}

.scroll-indicator {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-400), var(--primary-600));
  z-index: 1001;
  transition: width 0.1s ease;
}

.dark-theme { color-scheme: dark; }

.dark-theme ::-webkit-scrollbar-track {
  background: var(--dark-surface);
}

.dark-theme ::-webkit-scrollbar-thumb {
  background: var(--primary-400);
}

.dark-theme .hero-banner {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.1) 0%, rgba(219, 39, 119, 0.05) 100%);
}

.dark-theme .post-image {
  background: linear-gradient(45deg, rgba(236, 72, 153, 0.2), rgba(219, 39, 119, 0.2));
}

.dark-theme .search-overlay {
  background: rgba(0, 0, 0, 0.7);
}

.theme-toggle .material-icons {
  transition: transform var(--transition-normal);
}

.dark-theme .theme-toggle .material-icons {
  transform: rotate(180deg);
}

.font-size-transition {
  transition: font-size var(--transition-normal);
}

.anime-decoration {
  position: relative;
}

.anime-decoration::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--primary-400) 20%,
    var(--primary-600) 50%,
    var(--primary-400) 80%,
    transparent 100%
  );
  opacity: 0.6;
}

.elegant-border {
  position: relative;
  border: 1px solid var(--border-color);
}

.elegant-border::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  background: linear-gradient(
    45deg,
    var(--primary-200),
    transparent 30%,
    transparent 70%,
    var(--primary-200)
  );
  z-index: -1;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.elegant-border:hover::before {
  opacity: 1;
}

@keyframes gentle-float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(0px);
  }
}

.float-animation { animation: gentle-float 9s ease-in-out infinite; }

.gradient-text {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.elegant-shadow {
  box-shadow:
    0 1px 3px rgba(0, 0, 0, 0.06),
    0 1px 2px rgba(0, 0, 0, 0.12);
  transition: box-shadow var(--transition-normal);
}

.elegant-shadow:hover {
  box-shadow:
    0 4px 6px rgba(0, 0, 0, 0.07),
    0 2px 4px rgba(0, 0, 0, 0.06);
}

.dark-theme .elegant-shadow {
  box-shadow:
    0 1px 3px rgba(0, 0, 0, 0.3),
    0 1px 2px rgba(0, 0, 0, 0.24);
}

.dark-theme .elegant-shadow:hover {
  box-shadow:
    0 4px 6px rgba(0, 0, 0, 0.4),
    0 2px 4px rgba(0, 0, 0, 0.3);
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

#runtime {
  color: var(--primary-600);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.ripple-effect {
  position: relative;
  overflow: hidden;
}

.ripple-effect::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.ripple-effect:active::after {
  width: 300px;
  height: 300px;
}

.anime-highlight {
  position: relative;
  display: inline-block;
}

.anime-highlight::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-400), var(--primary-600), var(--primary-400));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.anime-highlight:hover::after {
  transform: scaleX(1);
}

.glass-effect {
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}

.elegant-focus:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.2);
  border-color: var(--primary-500);
}

.page-transition {
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal);
}

.page-transition.loaded {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.6s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.decoration-dots {
  position: relative;
}

.decoration-dots::before,
.decoration-dots::after {
  content: '';
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary-400);
  border-radius: 50%;
}

.decoration-dots::before {
  top: -8px;
  left: -8px;
}

.decoration-dots::after {
  bottom: -8px;
  right: -8px;
}

.typewriter {
  overflow: hidden;
  border-right: 2px solid var(--primary-500);
  white-space: nowrap;
  animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--primary-500); }
}

@media (max-width: 768px) {
  .font-size-large {
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 28px;
  }
}

@media (prefers-contrast: more) {
  :root {
    --border-color: #000000;
    --text-secondary: #333333;
  }

  .dark-theme {
    --border-color: #ffffff;
    --text-secondary: #cccccc;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 清理：背景移动相关规则已迁移到 bg-motion.css */
/* 删除 body::before 和相关 @keyframes ps-bg-*、ps-mask-*、测试动画等，避免覆盖 */