:root {
  --primary-color: #ff69b4;
  --primary-color-rgb: 255, 105, 180;
  --primary-light: #ffb7c5;
  --primary-dark: #ff1493;
  --secondary-color: #8a2be2;
  --secondary-light: #b19cd9;
  --accent-color: #00bfff;
  --bg-color: #f5f7fc;
  --bg-gradient: linear-gradient(135deg, #f5f7fc, #eef2fa);
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --card-border: 1px solid rgba(255, 255, 255, 0.7);
  --card-hover-shadow: 0 15px 40px rgba(138, 43, 226, 0.15);
  --text-primary: #333444;
  --text-secondary: #666677;
  --text-light: #888899;
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --border-color: rgba(0, 0, 0, 0.08);
  --animation-duration: 0.3s;
  --blur-effect: blur(10px);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --success-color: #7cd992;
  --error-color: #ff7285;
  --warning-color: #ffcb6b;
  --info-color: #64b5f6;
  --z-background: -1;
  --z-normal: 1;
  --z-header: 10;
  --z-modal: 100;
  --z-announcement: 150;
  --z-notification: 200;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", "Noto Sans SC", sans-serif;
}

html,
body {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
  transition: background-color 0.5s ease, color 0.5s ease;
}

.anime-bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -10;
  pointer-events: none;
  opacity: 0.4;
}

.anime-bg-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(50px);
  animation: floatCircle 8s ease-in-out infinite;
}

@keyframes floatCircle {
  0% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(20px, -20px);
  }
  100% {
    transform: translate(0, 0);
  }
}

.circle-1 {
  top: -10%;
  left: -10%;
  width: 40%;
  height: 40%;
  background: radial-gradient(circle, var(--primary-light), transparent 70%);
  opacity: 0.3;
  animation-delay: 0s;
}

.circle-2 {
  bottom: -15%;
  right: -10%;
  width: 50%;
  height: 50%;
  background: radial-gradient(circle, var(--secondary-light), transparent 70%);
  opacity: 0.25;
  animation-delay: 1s;
}

.circle-3 {
  top: 40%;
  left: 50%;
  width: 30%;
  height: 30%;
  background: radial-gradient(circle, var(--accent-color), transparent 70%);
  opacity: 0.15;
  animation-delay: 2s;
  animation-duration: 10s;
}

.app-container {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 10;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  margin-bottom: 1rem;
  backdrop-filter: var(--blur-effect);
  -webkit-backdrop-filter: var(--blur-effect);
  background-color: var(--glass-bg);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-left: 0;
  margin-right: auto;
}

.logo-icon {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.logo-icon i {
  font-size: 1.5rem;
  color: white;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.upload-section,
.file-section,
.preview-section {
  position: relative;
  z-index: 5;
  display: block;
}

.app-main {
  flex: 1;
  padding: 3rem 3rem 3rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  overflow-y: auto;
}

.section-title {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-left: 0.5rem;
}

.dot-decoration {
  width: 12px;
  height: 12px;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 50%;
  margin-right: 0.8rem;
  box-shadow: 0 0 10px var(--primary-light);
  position: relative;
}

.dot-decoration::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 50%;
  z-index: -1;
  opacity: 0.5;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.4);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 0.5;
  }
}

.section-title h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-right: 1rem;
}

.line-decoration {
  height: 2px;
  flex-grow: 1;
  background: linear-gradient(90deg, var(--primary-light), transparent);
  margin-left: 0.8rem;
}

.upload-card,
.file-card,
.preview-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
  backdrop-filter: var(--blur-effect);
  -webkit-backdrop-filter: var(--blur-effect);
  border: var(--card-border);
  margin-bottom: 2rem;
  z-index: 1;
}

.upload-card:hover,
.file-card:hover,
.preview-card:hover {
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-5px);
}

.upload-ts {
  margin-bottom: 1.5rem;
  color: deeppink;
  font-weight: 500;
  display: block;
  text-align: center;
}

.card-header {
  padding: 1.2rem 1.5rem;
  background: linear-gradient(
    to right,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  position: relative;
  overflow: hidden;
}

.card-header::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 150%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transform: translateX(-100%);
  animation: cardShine 4s infinite;
}

@keyframes cardShine {
  0% {
    transform: translateX(-100%);
  }
  20% {
    transform: translateX(100%);
  }
  100% {
    transform: translateX(100%);
  }
}

.card-header h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0;
}

.card-body {
  padding: 2rem;
}

.drop-area {
  border: 3px dashed var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  z-index: 5;
}

.drop-area::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background: radial-gradient(
    circle at center,
    var(--primary-light) 0%,
    transparent 75%
  );
  opacity: 0.3;
  transition: opacity 0.3s ease;
}

.drop-area:hover::before {
  opacity: 0.3;
}

.drop-area.highlight {
  border-color: var(--primary-color);
}

.drop-area-content {
  position: relative;
  z-index: 6;
}

.drop-icon {
  font-size: 4.5rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  position: relative;
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.1));
  display: block;
}

.drop-area h3 {
  font-size: 1.8rem;
  margin-bottom: 0.8rem;
  color: var(--primary-color);
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  display: block;
}

.upload-instruction {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  font-weight: 500;
  display: block;
}

.btn {
  padding: 0.9rem 2.5rem;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.5px;
}

.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: all 0.6s ease;
}

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

.btn.primary {
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  box-shadow: 0 4px 15px rgba(255, 105, 180, 0.3);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.btn.primary::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: all 0.6s ease;
  z-index: -1;
}

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

.btn.primary::after {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  z-index: -2;
  border-radius: 55px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.btn.primary:hover::after {
  opacity: 0.5;
}

.progress-container {
  height: 10px;
  background-color: var(--border-color);
  border-radius: 10px;
  margin-top: 2rem;
  overflow: hidden;
  position: relative;
  display: none;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 10px;
  position: relative;
  transition: width 0.3s ease;
}

.progress-bar::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.2) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.2) 75%,
    transparent 75%
  );
  background-size: 30px 30px;
  animation: progressStripes 1s linear infinite;
  border-radius: 10px;
}

@keyframes progressStripes {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 30px 0;
  }
}

.file-list {
  max-height: 400px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.file-item {
  display: flex;
  align-items: center;
  padding: 1.2rem;
  border-radius: var(--border-radius-sm);
  margin-bottom: 1rem;
  background-color: rgba(255, 255, 255, 0.5);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.file-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(
    to bottom,
    var(--primary-color),
    var(--secondary-color)
  );
}

.file-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.file-item:hover::after {
  transform: translateX(100%);
}

.file-icon {
  font-size: 1.5rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 1rem;
  color: white;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 12px;
}

.file-info {
  flex: 1;
}

.file-name {
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.file-url {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.file-url a {
  color: var(--accent-color);
  text-decoration: none;
  word-break: break-all;
  transition: color 0.2s ease;
}

.file-url a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.copy-btn {
  border: none;
  background-color: transparent;
  color: var(--primary-color);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: all 0.3s ease;
}

.copy-btn:hover {
  background-color: rgba(255, 105, 180, 0.1);
  transform: scale(1.05);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
  padding: 0.5rem;
}

.preview-item {
  position: relative;
  width: 100%;
  height: 250px;
  overflow: hidden;
  border-radius: var(--border-radius-sm);
  background-color: var(--card-bg);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.preview-item:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 8px 25px rgba(255, 105, 180, 0.2);
  border-color: var(--primary-light);
}

.preview-image {
  width: 100%;
  flex: 1;
  overflow: hidden;
  position: relative;
}

.preview-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.preview-item:hover .preview-image img {
  transform: scale(1.1);
}

.preview-video {
  width: 100%;
  flex: 1;
  overflow: hidden;
  position: relative;
}

.preview-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.5);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 2;
  transition: all 0.3s ease;
}

.preview-item:hover .play-icon {
  background-color: var(--primary-color);
  box-shadow: 0 0 15px var(--primary-light);
  transform: translate(-50%, -50%) scale(1.1);
}

.preview-info {
  padding: 0.75rem;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.9);
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.preview-info span {
  display: block;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.preview-audio {
  position: relative;
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

.preview-audio:hover {
  transform: scale(1.05);
}

.audio-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.preview-other {
  position: relative;
  width: 100%;
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(45deg, #f5f7fc, #eef2fa);
  transition: all 0.3s ease;
}

.preview-other .file-icon {
  color: var(--primary-color);
  display: flex;
  justify-content: center;
  align-items: center;
}

.preview-other .file-icon i {
  filter: drop-shadow(0 3px 5px rgba(0, 0, 0, 0.2));
}

.file-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: var(--z-modal);
  overflow: auto;
  backdrop-filter: var(--blur-effect);
  -webkit-backdrop-filter: var(--blur-effect);
}

.modal-content {
  position: relative;
  background-color: var(--card-bg);
  margin: 50px auto;
  padding: 0;
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 900px;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
  animation: modalFade 0.3s;
  border: var(--card-border);
  overflow: hidden;
}

@keyframes modalFade {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  padding: 1.2rem 1.5rem;
  background: linear-gradient(
    to right,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-weight: 600;
  font-size: 1.3rem;
  margin: 0;
}

.close-modal {
  color: white;
  font-size: 1.8rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.close-modal:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.modal-body {
  padding: 5rem;
  max-height: 80vh;
  overflow: auto;
}

#previewContent {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

#previewContent img {
  max-width: 100%;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

#previewContent video {
  max-width: 100%;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 0;
  border-radius: var(--border-radius-sm);
  background-color: var(--card-bg);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  z-index: var(--z-notification);
  width: 350px;
  max-width: calc(100% - 40px);
  overflow: hidden;
  transform: translateX(120%);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  border: var(--card-border);
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification-content {
  padding: 1rem;
}

.notification-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.notification-message {
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding-top: 0.5rem;
  line-height: 1.5;
}

.notification-close {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: 0.25rem;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.notification-close:hover {
  color: var(--primary-color);
  background-color: rgba(0, 0, 0, 0.05);
  transform: rotate(90deg);
}

.notification::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
}

.notification.success::before {
  background-color: var(--success-color);
}

.notification.error::before {
  background-color: var(--error-color);
}

.notification.warning::before {
  background-color: var(--warning-color);
}

.notification.info::before {
  background-color: var(--info-color);
}

.app-footer {
  background-color: var(--glass-bg);
  box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.05);
  backdrop-filter: var(--blur-effect);
  -webkit-backdrop-filter: var(--blur-effect);
  padding: 1rem 0;
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  width: 100%;
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-logo i {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.footer-logo span {
  font-weight: 600;
  color: var(--text-primary);
}

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

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.footer-links a:hover {
  color: var(--primary-color);
  transform: translateY(-3px);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(
    to bottom,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(
    to bottom,
    var(--primary-dark),
    var(--secondary-color)
  );
}

.audio-player {
  width: 100%;
  max-width: 500px;
  padding: 2rem;
  background: linear-gradient(
    45deg,
    rgba(255, 105, 180, 0.1),
    rgba(138, 43, 226, 0.1)
  );
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0 auto;
}

.audio-player .audio-icon {
  color: var(--primary-color);
  font-size: 3rem;
  margin-bottom: 1.5rem;
}

.audio-player h4 {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.audio-player audio {
  width: 100%;
}

audio::-webkit-media-controls-panel {
  background-color: var(--card-bg);
}

audio::-webkit-media-controls-play-button {
  background-color: var(--primary-color);
  border-radius: 50%;
}

@media (max-width: 768px) {
  .app-header {
    padding: 0.8rem 1rem;
  }

  .logo {
    gap: 0.5rem;
    margin-right: 0;
  }

  .nav-links {
    gap: 0.8rem;
    margin: 0 0.5rem;
  }

  .nav-link {
    font-size: 0.9rem;
    padding: 0.4rem 0.6rem;
  }

  .nav-link i {
    font-size: 1rem;
  }

  .logo h1 {
    font-size: 1.3rem;
  }

  .logo-icon {
    width: 35px;
    height: 35px;
  }

  .logo-icon i {
    font-size: 1.2rem;
  }

  .theme-toggle {
    position: relative;
    margin-left: auto;
  }

  #themeToggle {
    width: 35px;
    height: 35px;
    font-size: 1rem;
  }

  .app-main {
    padding: 1rem;
  }

  .section-title h2 {
    font-size: 1.5rem;
  }

  .preview-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .preview-item {
    height: 220px;
  }

  .preview-image,
  .preview-video,
  .preview-audio,
  .preview-other {
    min-height: 150px;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .drop-area {
    padding: 1.5rem 1rem;
  }

  .drop-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
  }

  .drop-area h3 {
    font-size: 1.2rem;
  }

  .upload-instruction {
    font-size: 0.9rem;
  }

  .btn {
    padding: 0.5rem 1rem;
  }
}

@media (max-width: 480px) {
  .footer-content {
    padding: 0.5rem;
  }

  .drop-icon {
    font-size: 3rem;
  }

  .drop-area h3 {
    font-size: 1.3rem;
  }

  .preview-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .preview-image,
  .preview-video {
    height: 120px;
  }

  .file-name {
    font-size: 0.95rem;
  }

  .file-url {
    font-size: 0.8rem;
  }

  .nav-links {
    gap: 0.4rem;
    margin: 0 0.2rem;
  }

  .nav-link {
    font-size: 0.8rem;
    padding: 0.3rem 0.4rem;
  }

  .nav-link i {
    font-size: 0.9rem;
  }
}

.art-player-container {
  width: 100%;
  max-width: 900px;
  height: 70vh;
  margin: 0 auto;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
  .art-player-container {
    height: 50vh;
  }
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}

.float-animation {
  animation: float 4s ease-in-out infinite;
}

.upload-container,
.file-container,
.preview-container {
  padding: 1rem;
  position: relative;
  z-index: 5;
}

.api-selector {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 1.5rem;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  background: var(--card-bg);
  border: 1px solid var(--border-color);
}

.api-btn {
  flex: 1;
  padding: 12px 24px;
  border: none;
  background: var(--card-bg);
  color: var(--text-color);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  border-right: 1px solid var(--border-color);
}

.api-btn:last-child {
  border-right: none;
}

.api-btn:hover {
  background: var(--hover-bg);
  transform: translateY(-1px);
}

.api-btn.active {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.3);
}

.api-btn.active:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.app-main .upload-section .upload-container .upload-card {
  opacity: 1 !important;
  transform: none !important;
  visibility: visible !important;
  display: block !important;
}

.preview-copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--primary-color);
  font-size: 1rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 10;
}

.preview-item:hover .preview-copy-btn {
  opacity: 1;
  transform: translateY(0);
}

.preview-copy-btn:hover {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 5px 15px rgba(255, 105, 180, 0.3);
  transform: translateY(0) scale(1.1);
}

.file-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin: 0 2rem;
}

.nav-link {
  position: relative;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1rem;
  padding: 0.5rem 0.8rem;
  border-radius: var(--border-radius-sm);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link i {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.nav-link:hover {
  color: var(--primary-color);
  background-color: rgba(var(--primary-color-rgb, 255, 105, 180), 0.08);
}

.nav-link:hover i {
  transform: translateY(-2px);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  transition: width 0.3s ease, left 0.3s ease;
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 80%;
  left: 10%;
}

.nav-link.active {
  color: var(--primary-color);
  background-color: rgba(var(--primary-color-rgb, 255, 105, 180), 0.1);
  font-weight: 600;
}

.nav-link.active::after {
  width: 80%;
  left: 10%;
}

.announcement-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: var(--z-announcement);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.announcement-modal.show {
  opacity: 1;
  visibility: visible;
}

.announcement-content {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  border: var(--card-border);
  backdrop-filter: var(--blur-effect);
  -webkit-backdrop-filter: var(--blur-effect);
  transform: scale(0.9) translateY(20px);
  transition: all 0.3s ease;
}

.announcement-modal.show .announcement-content {
  transform: scale(1) translateY(0);
}

.announcement-header {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.announcement-header::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 150%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: translateX(-100%);
  animation: cardShine 4s infinite;
}

.announcement-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.announcement-timer {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.announcement-body {
  padding: 2rem;
  line-height: 1.8;
}

.announcement-text {
  color: var(--text-primary);
}

.announcement-text p {
  margin-bottom: 1.2rem;
  font-size: 1rem;
}

.highlight-text {
  font-size: 1.2rem !important;
  font-weight: 700 !important;
  color: var(--primary-color) !important;
  text-align: center;
  margin-bottom: 1.5rem !important;
  padding: 1rem;
  background: linear-gradient(135deg, rgba(255, 105, 180, 0.1), rgba(138, 43, 226, 0.1));
  border-radius: var(--border-radius-sm);
  border-left: 4px solid var(--primary-color);
}

.warning-section {
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: rgba(255, 114, 133, 0.05);
  border-radius: var(--border-radius-sm);
  border-left: 4px solid var(--error-color);
}

.warning-section h3 {
  color: var(--error-color);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.warning-section p {
  margin-bottom: 0 !important;
  color: var(--text-secondary);
}

.final-warning {
  margin-top: 2rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, rgba(255, 105, 180, 0.1), rgba(138, 43, 226, 0.1));
  border-radius: var(--border-radius-sm);
  border: 2px solid var(--primary-color);
  text-align: center;
}

.final-warning p {
  margin: 0 !important;
  font-size: 1.1rem;
  color: var(--primary-color);
}

.announcement-footer {
  padding: 1.5rem 2rem;
  background: rgba(0, 0, 0, 0.02);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.announcement-footer .btn {
  min-width: 200px;
  transition: all 0.3s ease;
}

.announcement-footer .btn:disabled {
  background: linear-gradient(45deg, #ccc, #999);
  cursor: not-allowed;
  box-shadow: none;
}

.announcement-footer .btn:disabled:hover {
  transform: none;
  box-shadow: none;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .announcement-modal {
    padding: 1rem;
  }

  .announcement-content {
    max-height: 95vh;
  }

  .announcement-header {
    padding: 1rem 1.5rem;
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .announcement-header h2 {
    font-size: 1.3rem;
  }

  .announcement-body {
    padding: 1.5rem;
  }

  .announcement-text p {
    font-size: 0.95rem;
  }

  .highlight-text {
    font-size: 1.1rem !important;
  }

  .warning-section {
    padding: 1rem;
  }

  .announcement-footer {
    padding: 1rem 1.5rem;
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}