/* ============================================
   Premium Corporate Design - AI Photo Editor
   Listed-company grade visual identity
   ============================================ */

/* --- Design Tokens --- */
:root {
  --prem-navy-900: #0a1628;
  --prem-navy-800: #0f1d3a;
  --prem-navy-700: #132544;
  --prem-navy-600: #1a3055;
  --prem-navy-500: #2a4575;
  --prem-navy-400: #3d5a8f;
  --prem-navy-300: #5a7aaa;
  --prem-gold: #f0b429;
  --prem-gold-light: #f7d470;
  --prem-gold-dark: #c9950f;
  --prem-white: #ffffff;
  --prem-off-white: #f8fafc;
  --prem-gray-50: #f1f5f9;
  --prem-gray-100: #e2e8f0;
  --prem-gray-200: #cbd5e1;
  --prem-gray-400: #94a3b8;
  --prem-gray-500: #64748b;
  --prem-gray-600: #475569;
  --prem-gray-700: #334155;
  --prem-accent-blue: #3b82f6;
  --prem-accent-teal: #14b8a6;
  --prem-accent-purple: #8b5cf6;
  --prem-accent-rose: #f43f5e;
  --prem-accent-amber: #f59e0b;
  --prem-gradient-primary: linear-gradient(135deg, #0f1d3a 0%, #1a3055 50%, #132544 100%);
  --prem-gradient-gold: linear-gradient(135deg, #f0b429, #f59e0b);
  --prem-gradient-card: linear-gradient(145deg, rgba(255,255,255,0.95), rgba(248,250,252,0.9));
  --prem-glass-bg: rgba(255, 255, 255, 0.85);
  --prem-glass-border: rgba(255, 255, 255, 0.2);
  --prem-shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.08);
  --prem-shadow-md: 0 4px 16px rgba(10, 22, 40, 0.1);
  --prem-shadow-lg: 0 10px 40px rgba(10, 22, 40, 0.12);
  --prem-shadow-xl: 0 20px 60px rgba(10, 22, 40, 0.15);
  --prem-radius-sm: 8px;
  --prem-radius-md: 12px;
  --prem-radius-lg: 16px;
  --prem-radius-xl: 24px;
  --prem-font: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --prem-sidebar-width: 240px;
  --prem-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--prem-font);
  background: #fff;
  color: var(--prem-gray-700);
  line-height: 1.6;
  min-height: 100vh;
  padding: 0;
  overflow-x: hidden;
}

/* --- Background Decorative Elements --- */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  right: -30%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  bottom: -30%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(240, 180, 41, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* --- Main Container --- */
.container {
  max-width: min(calc(100% - var(--prem-sidebar-width)), 1600px);
  margin-left: var(--prem-sidebar-width);
  margin-right: auto;
  padding: 24px 32px 40px 8px;
  position: relative;
  z-index: 1;
  width: auto;
}

/* Ultra-wide: center the layout */
@media (min-width: 1840px) {
  .container {
    margin-left: calc(max(0px, calc((100% - 1840px) / 2)) + var(--prem-sidebar-width));
    padding: 24px 24px 40px 8px;
  }
}

/* ============================================
   Premium Sidebar Navigation
   ============================================ */
.sidebar-nav {
  position: fixed;
  left: max(0px, calc((100% - 1840px) / 2));
  top: 0;
  width: var(--prem-sidebar-width);
  height: 100vh;
  background: var(--prem-gradient-primary);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  box-shadow: 2px 0 20px rgba(10, 22, 40, 0.2);
  overflow-y: auto;
}

.sidebar-nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--prem-gradient-gold);
}

.nav-header {
  padding: 28px 20px 20px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-logo {
  margin-bottom: 12px;
}

.nav-logo-img {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.1);
  padding: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.nav-header h3 {
  color: var(--prem-white);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  opacity: 0.8;
  margin: 0;
}

.nav-header h3 i {
  display: none;
}

.nav-menu {
  list-style: none;
  padding: 12px 0;
  flex: 1;
}

.nav-menu li {
  margin: 2px 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  border-radius: var(--prem-radius-md);
  transition: var(--prem-transition);
  font-size: 14px;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) scaleY(0);
  width: 3px;
  height: 24px;
  background: var(--prem-gradient-gold);
  border-radius: 0 3px 3px 0;
  transition: var(--prem-transition);
}

.nav-link i {
  width: 20px;
  text-align: center;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.4);
  transition: var(--prem-transition);
}

.nav-link:hover {
  color: var(--prem-white);
  background: rgba(255, 255, 255, 0.06);
}

.nav-link:hover i {
  color: var(--prem-gold-light);
}

.nav-link:hover::before {
  transform: translateY(-50%) scaleY(1);
}

/* Active nav link - controlled by JS scroll spy */
.nav-link.active {
  color: var(--prem-white);
  background: rgba(240, 180, 41, 0.1);
}

.nav-link.active i {
  color: var(--prem-gold);
}

.nav-link.active::before {
  transform: translateY(-50%) scaleY(1);
}

.nav-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-hint {
  color: rgba(255, 255, 255, 0.3);
  font-size: 11px;
  text-align: center;
  letter-spacing: 0.3px;
}

.nav-hint i {
  margin-right: 4px;
}

/* ============================================
   Premium Header / Hero
   ============================================ */
.header {
  position: relative;
  margin-bottom: 32px;
  padding: 28px 24px;
  background: linear-gradient(135deg, rgba(15, 29, 58, 0.97), rgba(26, 48, 85, 0.95));
  border-radius: var(--prem-radius-xl);
  box-shadow: var(--prem-shadow-lg);
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(240, 180, 41, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--prem-gradient-gold);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  position: relative;
  z-index: 1;
}

.header-left {
  flex: 1;
  min-width: 280px;
}

.header-right {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.header-buttons {
  display: flex;
  gap: 10px;
}

.logo {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--prem-white);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.tagline {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 640px;
  margin: 0;
  line-height: 1.6;
}

/* --- Header Buttons --- */
.btn-service,
.btn-login {
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.3px;
  width: auto;
  margin-bottom: 0;
  box-shadow: none;
}

.btn-service {
  background: rgba(255, 255, 255, 0.1);
  color: var(--prem-white);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-service:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-login {
  background: var(--prem-gradient-gold);
  color: var(--prem-navy-900);
  box-shadow: 0 4px 14px rgba(240, 180, 41, 0.3);
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 180, 41, 0.4);
}

.btn-login.logged-in {
  background: rgba(255, 255, 255, 0.12);
  color: var(--prem-white);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: none;
}

.btn-login.logged-in:hover {
  background: rgba(255, 255, 255, 0.2);
  box-shadow: var(--prem-shadow-md);
}

/* ============================================
   Premium Feature Sections
   ============================================ */
.feature-section {
  background: var(--prem-gradient-card);
  backdrop-filter: blur(10px);
  border-radius: var(--prem-radius-lg);
  padding: 24px 20px;
  margin-bottom: 20px;
  box-shadow: var(--prem-shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: var(--prem-transition);
  position: relative;
  overflow: hidden;
}

.feature-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--prem-gold), var(--prem-accent-blue), transparent);
  opacity: 0.6;
}

.feature-section:hover {
  box-shadow: var(--prem-shadow-md);
  transform: translateY(-2px);
}

/* Decorative accent dot */
.feature-section::after {
  content: '';
  position: absolute;
  top: 16px;
  right: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--prem-gold);
  opacity: 0.3;
}

.feature-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--prem-gray-100);
}

.feature-header h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--prem-navy-800);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.feature-header h2 i {
  color: var(--prem-gold-dark);
  font-size: 1.2em;
}

.feature-header p {
  color: var(--prem-gray-500);
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 90%;
}

/* --- Demo Area --- */
.demo-area {
  padding: 0;
  max-width: 100%;
}

.demo-container {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: nowrap;
  justify-content: space-between;
  max-width: 100%;
}

.image-container {
  flex: 0 0 calc(70% - 24px);
  min-width: 200px;
  max-width: calc(70% - 24px);
}

@media (min-width: 1400px) {
  .image-container {
    max-width: 65%;
  }
}

.image-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--prem-gray-600);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.image-label .image-action-btn,
.batch-image-label .image-action-btn {
  background: #059669;
  border: 1px solid #059669;
  color: #fff;
  border-radius: 6px;
  padding: 5px 14px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  margin-left: 4px;
}
.image-label .image-action-btn:hover,
.batch-image-label .image-action-btn:hover {
  background: #047857;
  border-color: #047857;
  color: #fff;
  transform: translateY(-1px);
}

.original-image,
.result-image {
  position: relative;
  border-radius: var(--prem-radius-lg);
  overflow: hidden;
  background: var(--prem-gray-50);
  border: 1px solid var(--prem-gray-100);
  cursor: pointer;
  transition: var(--prem-transition);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.original-image:hover,
.result-image:hover {
  box-shadow: var(--prem-shadow-md);
  border-color: var(--prem-gray-200);
}

.original-image img,
.result-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* --- Demo Controls --- */
.demo-controls {
  flex: 0 0 30%;
  min-width: 200px;
  max-width: 30%;
  display: flex;
  flex-direction: column;
}

.control-group {
  background: var(--prem-white);
  padding: 20px;
  border-radius: var(--prem-radius-lg);
  border: 1px solid var(--prem-gray-100);
  box-shadow: var(--prem-shadow-sm);
  margin-bottom: 16px;
}

.control-btn {
  background: var(--prem-gradient-primary);
  color: var(--prem-white);
  border: none;
  padding: 12px 24px;
  border-radius: var(--prem-radius-md);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  justify-content: center;
  letter-spacing: 0.3px;
}

.control-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 29, 58, 0.25);
}

.control-btn:active {
  transform: translateY(0);
}

.control-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  pointer-events: none;
}

.hint {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--prem-gray-500);
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  padding: 0;
  border-radius: 0;
}

.hint i {
  color: var(--prem-gold-dark);
}

/* ============================================
   Mode Switcher
   ============================================ */
.mode-switcher {
  margin: 0 0 24px;
}

.mode-buttons {
  display: inline-flex;
  background: var(--prem-gray-50);
  border-radius: 50px;
  padding: 4px;
  border: 1px solid var(--prem-gray-100);
}

.btn-mode {
  border: none;
  padding: 10px 20px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--prem-gray-600);
}

.btn-mode.active,
.btn-mode.btn-primary.active {
  background: var(--prem-gradient-primary);
  color: var(--prem-white);
  box-shadow: 0 4px 12px rgba(15, 29, 58, 0.2);
}

.btn-mode.btn-outline-primary {
  background: transparent;
  color: var(--prem-gray-600);
}

.btn-mode.btn-outline-primary:hover {
  color: var(--prem-navy-700);
  background: rgba(15, 29, 58, 0.05);
}

.mode-hint {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--prem-gray-500);
}

/* ============================================
   Slider Controls
   ============================================ */
.slider-container {
  margin-top: 16px;
}

.slider-container label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--prem-gray-600);
  margin-bottom: 8px;
}

.slider-container input[type="range"] {
  width: 100%;
  height: 5px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--prem-gray-100);
  border-radius: 4px;
  outline: none;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--prem-gold);
  cursor: pointer;
  border: 2px solid var(--prem-white);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

/* ============================================
   Progress Bar
   ============================================ */
.progress-container {
  background: var(--prem-white);
  border-radius: var(--prem-radius-md);
  padding: 16px;
  border: 1px solid var(--prem-gray-100);
  margin-top: 16px;
}

.progress {
  height: 8px;
  border-radius: 4px;
  background: var(--prem-gray-100);
  overflow: hidden;
}

.progress-bar {
  background: linear-gradient(90deg, var(--prem-gold), var(--prem-gold-dark));
  transition: width 0.4s ease;
  height: 100%;
}

.progress-text {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--prem-gray-500);
  text-align: center;
}

/* ============================================
   Background Options
   ============================================ */
.background-options {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 12px;
  max-height: 360px;
  overflow-y: auto;
  padding-right: 4px;
}

.background-options::-webkit-scrollbar {
  width: 5px;
}
.background-options::-webkit-scrollbar-track {
  background: transparent;
}
.background-options::-webkit-scrollbar-thumb {
  background: var(--prem-gray-300);
  border-radius: 10px;
}
.background-options::-webkit-scrollbar-thumb:hover {
  background: var(--prem-gray-400);
}

.bg-option {
  cursor: pointer;
  text-align: center;
  padding: 6px;
  border-radius: var(--prem-radius-md);
  border: 2px solid transparent;
  transition: var(--prem-transition);
  background: var(--prem-gray-50);
}

.bg-option:hover {
  border-color: var(--prem-gray-200);
  background: var(--prem-white);
}

.bg-option.active {
  border-color: var(--prem-gold);
  background: rgba(240, 180, 41, 0.05);
}

.bg-option img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 2px;
}

.bg-option span {
  display: block;
  font-size: 0.7rem;
  color: var(--prem-gray-600);
  font-weight: 500;
  line-height: 1.2;
}

.custom-bg-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 80px;
}

.custom-bg-option .upload-icon i {
  font-size: 1.5rem;
  color: var(--prem-gray-400);
}

/* ============================================
   Animation Areas
   ============================================ */
.animation-area {
  position: relative;
  height: 40px;
  overflow: hidden;
}

.pulse-circle {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--prem-gold);
  margin: 0 auto;
  animation: premPulse 2s ease-in-out infinite;
}

@keyframes premPulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

.scan-line {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--prem-gold), transparent);
  width: 60%;
  margin: 14px auto 0;
  animation: premScan 2s ease-in-out infinite;
}

@keyframes premScan {
  0% { transform: translateX(-60%); opacity: 0; }
  50% { opacity: 0.8; }
  100% { transform: translateX(60%); opacity: 0; }
}

.particles {
  position: relative;
  height: 100%;
}

/* ============================================
   Batch Processing Section
   ============================================ */
.batch-section {
  margin-bottom: 20px;
}

.batch-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--prem-navy-800);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.batch-header h3 i {
  color: var(--prem-gold-dark);
}

.batch-description {
  font-size: 0.85rem;
  color: var(--prem-gray-500);
}

/* 背景替换 - 照片来源选择器 */
.bg-source-selector {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  padding: 0 4px;
}
.bg-source-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--prem-gray-600);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 5px;
}
.bg-source-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.bg-source-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1.5px solid var(--prem-gray-100);
  background: var(--prem-white);
  cursor: pointer;
  transition: var(--prem-transition);
  user-select: none;
}
.bg-source-btn:hover {
  border-color: var(--prem-accent-purple);
  background: #faf5ff;
}
.bg-source-btn.active {
  border-color: var(--prem-accent-purple);
  background: linear-gradient(135deg, #f3e8ff, #ede5ff);
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.15);
}
.bg-source-btn i {
  font-size: 16px;
  color: var(--prem-accent-purple);
}
.bg-source-btn .source-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--prem-gray-700);
}
.bg-source-btn .source-desc {
  font-size: 11px;
  color: var(--prem-gray-400);
  display: none;
}
@media (min-width: 768px) {
  .bg-source-btn .source-desc {
    display: inline;
  }
}

.batch-thumbnails-container {
  background: var(--prem-white);
  border-radius: var(--prem-radius-lg);
  padding: 20px;
  border: 1px solid var(--prem-gray-100);
  box-shadow: var(--prem-shadow-sm);
  margin-bottom: 20px;
}

.batch-thumbnails-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--prem-gray-100);
}

.batch-thumbnails-title {
  font-weight: 600;
  color: var(--prem-navy-700);
  display: flex;
  align-items: center;
  gap: 10px;
}

.batch-thumbnails-stats {
  font-size: 0.9em;
  color: var(--prem-gray-500);
}

#clear-pending-btn {
  background: var(--prem-accent-rose);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 0.85em;
  font-weight: 600;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 8px rgba(244, 63, 94, 0.25);
}

#clear-pending-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(244, 63, 94, 0.35);
}

.batch-thumbnails-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 12px;
  max-height: 220px;
  overflow-y: auto;
  padding: 4px;
}

.batch-thumbnail {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: var(--prem-radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: var(--prem-transition);
  border: 2px solid transparent;
  background: var(--prem-gray-50);
}

.batch-thumbnail:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(10, 22, 40, 0.12);
}

.batch-thumbnail.active {
  border-color: var(--prem-gold);
  box-shadow: 0 0 0 3px rgba(240, 180, 41, 0.2);
}

.batch-thumbnail.pending { border-color: var(--prem-gray-200); }
.batch-thumbnail.processing { border-color: var(--prem-accent-blue); }
.batch-thumbnail.completed { border-color: var(--prem-accent-teal); }
.batch-thumbnail.failed { border-color: var(--prem-accent-rose); }

.batch-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Add thumbnail button — 醒目的金色上传入口 */
.batch-thumbnail.add-thumbnail {
  border: 2px solid var(--prem-gold);
  background: linear-gradient(135deg, rgba(240, 180, 41, 0.12) 0%, rgba(240, 180, 41, 0.04) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--prem-transition);
  animation: premAddGlow 2.5s ease-in-out infinite;
}

.batch-thumbnail.add-thumbnail:hover {
  transform: translateY(-2px);
  border-color: var(--prem-gold-dark);
  background: linear-gradient(135deg, rgba(240, 180, 41, 0.22) 0%, rgba(240, 180, 41, 0.08) 100%);
  box-shadow: 0 6px 16px rgba(240, 180, 41, 0.3);
  animation: none;
}

.add-icon-container {
  color: var(--prem-gold);
  margin-bottom: 2px;
  transition: var(--prem-transition);
}
.batch-thumbnail.add-thumbnail:hover .add-icon-container {
  transform: scale(1.12);
}

.add-text {
  font-size: 0.7rem;
  color: var(--prem-gold-dark);
  font-weight: 600;
  transition: var(--prem-transition);
}

@keyframes premAddGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(240, 180, 41, 0); }
  50% { box-shadow: 0 0 0 5px rgba(240, 180, 41, 0.08); }
}

/* Status indicator dot */
.batch-thumbnail-status {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--prem-white);
}

.batch-thumbnail-status.pending { background: var(--prem-gray-400); }
.batch-thumbnail-status.processing { background: var(--prem-accent-blue); animation: premPulse 1.5s infinite; }
.batch-thumbnail-status.completed { background: var(--prem-accent-teal); }
.batch-thumbnail-status.failed { background: var(--prem-accent-rose); }

.batch-thumbnail-delete {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--prem-accent-rose);
  color: white;
  border: 2px solid var(--prem-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  z-index: 10;
  opacity: 0.9;
  transition: var(--prem-transition);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.batch-thumbnail-delete:hover {
  opacity: 1;
  transform: scale(1.15);
}

.batch-thumbnail-delete.hidden {
  display: none;
}

.batch-thumbnail-retry {
  position: absolute;
  bottom: -6px;
  right: -6px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #3498db;
  color: white;
  border: 2px solid var(--prem-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  z-index: 10;
  opacity: 0.9;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.batch-thumbnail-retry:hover {
  opacity: 1;
  transform: scale(1.15);
}

.bg-batch-dragover {
  outline: 3px dashed #3498db;
  outline-offset: -3px;
  background: rgba(52, 152, 219, 0.05);
  border-radius: 12px;
  transition: background 0.2s;
}

.batch-cancel-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding: 6px 16px;
  background: var(--prem-gray-50, #f1f5f9);
  color: var(--prem-navy-600, #475569);
  border: 1px solid var(--prem-gray-200, #cbd5e1);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}
.batch-cancel-btn:hover {
  background: var(--prem-accent-rose, #ef4444);
  color: white;
  border-color: var(--prem-accent-rose, #ef4444);
}

/* Batch progress */
.batch-progress-overall {
  background: var(--prem-white);
  border-radius: var(--prem-radius-lg);
  padding: 20px;
  border: 1px solid var(--prem-gray-100);
  box-shadow: var(--prem-shadow-sm);
  margin-bottom: 20px;
}

.batch-progress-overall h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--prem-navy-700);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.batch-progress-text {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--prem-gray-500);
}

/* Batch actions */
.batch-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-bottom: 20px;
}

.batch-process-btn,
.batch-download-btn {
  padding: 14px 28px;
  border: 2px solid transparent;
  border-radius: var(--prem-radius-md);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ===== 开始批量合成（主按钮） ===== */
.batch-process-btn {
  background: var(--prem-gradient-primary);
  color: var(--prem-white);
  box-shadow: 0 4px 12px rgba(15, 29, 58, 0.25);
}
.batch-process-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 29, 58, 0.35);
}
.batch-process-btn:not(:disabled) {
  background: linear-gradient(135deg, #1a3055 0%, #132544 100%);
  border-color: var(--prem-gold);
  box-shadow: 0 4px 16px rgba(240, 180, 41, 0.15);
}
/* 禁用态 — 保留轮廓让用户知道这里有个按钮 */
.batch-process-btn:disabled {
  opacity: 1;
  cursor: not-allowed;
  transform: none;
  background: var(--prem-white);
  border-color: var(--prem-gray-300);
  border-style: dashed;
  color: var(--prem-gray-400);
  box-shadow: none;
}
/* 禁用态下的图标变灰 */
.batch-process-btn:disabled i {
  opacity: 0.5;
}
/* 启用脉冲引导 */
.batch-process-btn.just-enabled {
  animation: premBtnEnabledPulse 1.2s ease-out;
}

/* ===== 下载全部（次按钮） ===== */
.batch-download-btn {
  background: var(--prem-accent-teal);
  color: white;
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.2);
}
.batch-download-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(20, 184, 166, 0.3);
}
.batch-download-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ===== 下载全部（所有电商平台尺寸） ===== */
.batch-download-all-sizes-btn {
  padding: 14px 28px;
  border: 2px solid transparent;
  border-radius: var(--prem-radius-md);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--prem-accent-purple, #9b59b6);
  color: white;
  box-shadow: 0 4px 12px rgba(155, 89, 182, 0.2);
}
.batch-download-all-sizes-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(155, 89, 182, 0.3);
}
.batch-download-all-sizes-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

@keyframes premBtnEnabledPulse {
  0%   { box-shadow: 0 0 0 0 rgba(240, 180, 41, 0.5), 0 0 0 0 rgba(240, 180, 41, 0.3); }
  50%  { box-shadow: 0 0 0 12px rgba(240, 180, 41, 0), 0 0 0 6px rgba(240, 180, 41, 0.1); }
  100% { box-shadow: 0 4px 16px rgba(240, 180, 41, 0.15), 0 0 0 0 rgba(240, 180, 41, 0); }
}


/* Batch image display area */
.batch-image-display {
  display: flex;
  flex-wrap: nowrap;
  gap: 24px;
  align-items: flex-start;
  margin-top: 20px;
}

.batch-image-container {
  flex: 0 0 calc(70% - 24px);
  min-width: 200px;
  max-width: calc(70% - 24px);
}

.batch-image-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--prem-gray-600);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.batch-original-image,
.batch-result-image {
  position: relative;
  border-radius: var(--prem-radius-lg);
  overflow: hidden;
  border: 1px solid var(--prem-gray-200);
  cursor: pointer;
  transition: var(--prem-transition);
  height: clamp(220px, 28vw, 500px);
}

.batch-original-image {
  background: var(--prem-white);
}

.batch-result-image {
  background-image:
    linear-gradient(45deg, #e8e8e8 25%, transparent 25%),
    linear-gradient(-45deg, #e8e8e8 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e8e8e8 75%),
    linear-gradient(-45deg, transparent 75%, #e8e8e8 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.batch-original-image:hover,
.batch-result-image:hover {
  box-shadow: var(--prem-shadow-md);
  border-color: var(--prem-gray-200);
}

.batch-original-image img,
.batch-result-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.06);
}

/* Batch navigation arrows */
.batch-nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 80px;
  height: 80px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  color: #333;
  font-size: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
  transition: all 0.2s;
  opacity: 0.9;
}
.batch-nav-arrow:hover {
  opacity: 1;
  background: #fff;
  box-shadow: 0 3px 10px rgba(0,0,0,0.25);
}
.batch-nav-arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  box-shadow: none;
}
.batch-nav-prev { left: 8px; }
.batch-nav-next { right: 8px; }
.batch-nav-prev i, .batch-nav-next i { pointer-events: none; }

.batch-nav-indicator {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 2px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  pointer-events: none;
  white-space: nowrap;
}

/* Simplified batch controls */
.batch-controls-simplified {
  flex: 0 0 30%;
  min-width: 200px;
  max-width: 30%;
  display: flex;
  flex-direction: column;
}

.batch-controls-simplified .control-group {
  background: var(--prem-white);
  padding: 24px;
  border-radius: var(--prem-radius-lg);
  border: 1px solid var(--prem-gray-100);
  box-shadow: var(--prem-shadow-sm);
  margin-bottom: 0;
  margin-top: 36px;
}

/* Upload area */
.upload-area {
  text-align: center;
  padding: 20px;
}

.upload-icon i {
  color: var(--prem-gray-400);
  margin-bottom: 12px;
}

.upload-area h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--prem-navy-700);
  margin-bottom: 4px;
}

.upload-area p {
  font-size: 0.85rem;
  color: var(--prem-gray-500);
  margin-bottom: 16px;
}

.upload-btn {
  background: var(--prem-gradient-primary);
  color: var(--prem-white);
  border: none;
  padding: 10px 24px;
  border-radius: var(--prem-radius-md);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(15, 29, 58, 0.2);
}

.file-hint {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--prem-gray-400);
}

/* Cutout mode buttons */
.cutout-mode-buttons {
  margin-bottom: 8px;
}

.smart-cutout-btn i {
  font-size: 1.1em;
}

.model-hint {
  font-size: 0.8rem;
  color: var(--prem-gold-dark);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ============================================
   Video / Douyin Section
   ============================================ */
.video-processing-container {
  background: var(--prem-white);
  border-radius: var(--prem-radius-lg);
  padding: 24px;
  border: 1px solid var(--prem-gray-100);
  box-shadow: var(--prem-shadow-sm);
}

.video-input-section label {
  display: block;
  font-weight: 600;
  color: var(--prem-navy-700);
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.video-input-section label i {
  color: var(--prem-gold-dark);
  margin-right: 6px;
}

.video-input-section .form-control {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--prem-gray-100);
  border-radius: var(--prem-radius-md);
  font-size: 14px;
  transition: var(--prem-transition);
  background: var(--prem-off-white);
}

.video-input-section .form-control:focus {
  border-color: var(--prem-navy-400);
  box-shadow: 0 0 0 3px rgba(42, 69, 117, 0.1);
  outline: none;
  background: var(--prem-white);
}

.video-input-section .form-text {
  margin-top: 6px;
  font-size: 0.8rem;
  color: var(--prem-gray-400);
}

.action-group {
  text-align: center;
  margin-top: 16px;
}

.action-group .control-btn {
  background: var(--prem-gradient-primary);
  color: var(--prem-white);
  border: none;
  padding: 12px 28px;
  border-radius: var(--prem-radius-md);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: auto;
  min-width: 160px;
}

.action-group .control-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 29, 58, 0.25);
}

.action-group .hint {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--prem-gray-400);
  justify-content: center;
}

/* Douyin row layout */
.douyin-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  width: 100%;
}

.douyin-left {
  flex: 0 0 calc(55% - 10px);
  max-width: calc(55% - 10px);
}

.douyin-right {
  flex: 0 0 calc(45% - 10px);
  max-width: calc(45% - 10px);
}

@media (max-width: 768px) {
  .douyin-left,
  .douyin-right {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

/* Video player */
.video-player-wrapper {
  background: #000;
  border-radius: var(--prem-radius-md);
  overflow: hidden;
  position: relative;
}

.video-player-wrapper video {
  display: block;
  width: 100%;
  max-height: 450px;
  background: #000;
}

.video-player-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  color: var(--prem-gray-400);
  background: var(--prem-gray-50);
  border-radius: var(--prem-radius-md);
}

.video-player-placeholder i {
  font-size: 3.5em;
  opacity: 0.25;
  margin-bottom: 12px;
}

.video-player-info {
  padding: 12px 0 0;
}

.video-desc-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--prem-gray-700);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 4px;
}

.video-meta-text {
  font-size: 0.8rem;
  color: var(--prem-gray-500);
}

.video-info-table {
  font-size: 0.85rem;
  margin-bottom: 0;
}

.video-info-table th {
  width: 60px;
  color: var(--prem-gray-600);
  font-weight: 500;
}

.video-info-table td {
  word-break: break-all;
}

/* Result card */
.result-card {
  background: linear-gradient(135deg, #ecfdf5, #fffbeb);
  border-radius: var(--prem-radius-lg);
  padding: 24px;
  text-align: center;
  border: 2px solid var(--prem-accent-teal);
}

.success-icon {
  font-size: 2.5em;
  color: var(--prem-accent-teal);
  margin-bottom: 12px;
}

.result-card h4 {
  color: #059669;
  margin-bottom: 8px;
  font-weight: 600;
}

.result-card p {
  color: var(--prem-gray-500);
  margin-bottom: 0;
  font-size: 0.9rem;
}

/* ============================================
   Premium Footer
   ============================================ */
.footer {
  text-align: center;
  padding: 32px 20px 20px;
  margin-top: 40px;
  border-top: 1px solid var(--prem-gray-100);
  color: var(--prem-gray-400);
  font-size: 0.85rem;
}

.footer p {
  margin: 0;
  line-height: 2;
}

.footer .disclaimer {
  font-size: 0.8rem;
  opacity: 0.7;
}

/* ============================================
   Custom Modal - Premium Style
   ============================================ */
#customConfirmModal,
#customAlertModal {
  z-index: 1070;
}

.custom-modal-content {
  border-radius: var(--prem-radius-xl);
  overflow: hidden;
  box-shadow: var(--prem-shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.custom-modal-header {
  background: var(--prem-gradient-primary);
  color: var(--prem-white);
  border-bottom: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.custom-modal-header .btn-close {
  filter: brightness(0) invert(1);
  opacity: 0.6;
}

.custom-modal-header .btn-close:hover {
  opacity: 1;
}

.custom-modal-icon {
  font-size: 1.5em;
  display: flex;
  align-items: center;
}

.custom-modal-header .modal-title {
  font-weight: 600;
  font-size: 1.1em;
  margin: 0;
}

.custom-modal-body {
  padding: 28px 24px;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--prem-gray-700);
  text-align: center;
}

.custom-modal-footer {
  border-top: 1px solid var(--prem-gray-100);
  padding: 16px 24px;
  display: flex;
  justify-content: center;
  gap: 12px;
}

.custom-cancel-btn {
  padding: 10px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 14px;
  background: var(--prem-gray-50);
  color: var(--prem-gray-600);
  border: 1px solid var(--prem-gray-200);
  cursor: pointer;
  transition: var(--prem-transition);
}

.custom-cancel-btn:hover {
  background: var(--prem-gray-100);
  transform: translateY(-1px);
}

.custom-confirm-btn {
  padding: 10px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 14px;
  background: var(--prem-gradient-gold) !important;
  color: var(--prem-navy-900) !important;
  border: none !important;
  cursor: pointer;
  transition: var(--prem-transition);
  box-shadow: 0 4px 12px rgba(240, 180, 41, 0.3) !important;
}

.custom-confirm-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 180, 41, 0.4) !important;
}

/* Warning/error modal variant */
.custom-alert-warning .custom-modal-header {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
}

/* ============================================
   Refresh Warning Bar
   ============================================ */
.refresh-warning-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, var(--prem-navy-800), var(--prem-navy-600));
  color: var(--prem-white);
  padding: 14px 24px;
  z-index: 9999;
  box-shadow: 0 4px 16px rgba(10, 22, 40, 0.3);
  border-bottom: 3px solid var(--prem-gold);
  animation: premSlideDown 0.3s ease-out;
}

@keyframes premSlideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.refresh-warning-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 12px;
}

.refresh-warning-icon {
  font-size: 1.3em;
  color: var(--prem-gold);
  flex-shrink: 0;
}

.refresh-warning-text {
  flex: 1;
  font-size: 0.95rem;
  line-height: 1.4;
}

.refresh-warning-text strong {
  font-weight: 600;
  color: var(--prem-gold-light);
}

.refresh-warning-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.refresh-warning-btn {
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--prem-transition);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.refresh-warning-continue {
  background: rgba(255, 255, 255, 0.15);
  color: var(--prem-white);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.refresh-warning-continue:hover {
  background: rgba(255, 255, 255, 0.25);
}

.refresh-warning-cancel {
  background: var(--prem-gradient-gold);
  color: var(--prem-navy-900);
}

.refresh-warning-cancel:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(240, 180, 41, 0.3);
}

/* ============================================
   User Dropdown
   ============================================ */
.user-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--prem-white);
  border: 1px solid var(--prem-gray-100);
  border-radius: var(--prem-radius-lg);
  box-shadow: var(--prem-shadow-lg);
  z-index: 2147483647;
  min-width: 200px;
  padding: 8px 0;
  margin-top: 4px;
}

.dropdown-item {
  padding: 10px 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--prem-gray-700);
  transition: var(--prem-transition);
}

.dropdown-item:hover {
  background: var(--prem-gray-50) !important;
}

.dropdown-item i {
  width: 18px;
  color: var(--prem-gray-500);
}

/* ============================================
   WeChat QR Modal
   ============================================ */
.wechat-login-modal .modal-content {
  background: var(--prem-white);
  border-radius: var(--prem-radius-xl);
  box-shadow: var(--prem-shadow-xl);
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--prem-gray-200);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--prem-gray-400);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
  .container {
    margin-left: var(--prem-sidebar-width);
    padding: 20px 24px 32px 8px;
  }

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

/* Upload buttons in feature header */
.feature-header .upload-buttons-container {
  display: inline;
  margin-left: 8px;
  white-space: nowrap;
}

.feature-header .upload-buttons-container .image-action-btn {
  background: rgba(240, 180, 41, 0.1);
  border: 1px solid var(--prem-gold);
  color: var(--prem-navy-700);
  border-radius: 6px;
  padding: 5px 14px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--prem-transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  margin-left: 4px;
}

.feature-header .upload-buttons-container .image-action-btn:hover {
  background: var(--prem-gold);
  color: var(--prem-navy-900);
  transform: translateY(-1px);
}

@media (max-width: 992px) {
  :root {
    --prem-sidebar-width: 200px;
  }

  .header-content {
    flex-direction: column;
    align-items: stretch;
  }

  .header-right {
    justify-content: flex-start;
  }

  .demo-container {
    flex-direction: column;
    align-items: center;
  }

  .demo-container .image-container {
    flex: 0 0 100% !important;
    max-width: 100% !important;
    width: 100%;
  }

  .demo-container .demo-controls {
    flex: 0 0 100% !important;
    max-width: 100% !important;
    width: 100%;
  }

  .batch-image-display {
    flex-direction: column;
  }

  .batch-image-container {
    flex: 0 0 100% !important;
    max-width: 100% !important;
    width: 100%;
  }

  .batch-controls-simplified {
    flex: 0 0 100% !important;
    max-width: 100% !important;
    width: 100%;
  }

  .feature-header p {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  :root {
    --prem-sidebar-width: 0px;
  }

  .sidebar-nav {
    display: none;
  }

  .container {
    margin-left: 0;
    max-width: 100%;
    padding: 12px 8px;
  }

  .header {
    padding: 24px 20px;
    border-radius: var(--prem-radius-lg);
  }

  .logo {
    font-size: 1.6rem;
  }

  .feature-section {
    padding: 20px;
    border-radius: var(--prem-radius-lg);
  }

  .feature-header h2 {
    font-size: 1.15rem;
  }

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

  .batch-image-container {
    max-width: 100%;
    min-width: 100%;
  }

  .batch-controls-simplified {
    max-width: 100%;
    min-width: 100%;
  }

  .batch-actions {
    flex-direction: column;
  }

  .batch-process-btn,
  .batch-download-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .batch-thumbnails-header {
    flex-direction: column;
    gap: 10px;
    align-items: stretch;
  }

  .batch-thumbnails-title,
  .batch-thumbnails-stats {
    text-align: center;
  }

  .refresh-warning-content {
    flex-direction: column;
    text-align: center;
  }

  .refresh-warning-actions {
    justify-content: center;
  }
}

/* ============================================
   Cutout Options Panel (背景色 / 尺寸 / 主体占比)
   ============================================ */
.cutout-options-panel {
  margin-top: 16px;
  padding: 16px;
  background: #fff;
  border-radius: var(--prem-radius-md, 12px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  border: 1px solid var(--prem-gray-100, #e2e8f0);
}

.cutout-options-panel .cutout-option-section {
  margin-bottom: 14px;
}
.cutout-options-panel .cutout-option-section:last-child {
  margin-bottom: 0;
}

.cutout-options-panel .option-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--prem-navy-700, #334155);
  margin-bottom: 8px;
}
.cutout-options-panel .option-label i {
  font-size: 14px;
  color: var(--prem-accent-purple, #8b5cf6);
}

/* 背景色选择 */
.bg-color-options {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.bg-color-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 8px;
  border: 2px solid transparent;
  transition: all 0.2s;
  min-width: 52px;
}
.bg-color-btn.active {
  border-color: var(--prem-accent-purple, #8b5cf6);
  background: rgba(139, 92, 246, 0.08);
}
.bg-color-btn:hover {
  background: rgba(139, 92, 246, 0.05);
}
.bg-color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: block;
  flex-shrink: 0;
}
.bg-color-swatch.checkered {
  background-image:
    linear-gradient(45deg, #ccc 25%, transparent 25%),
    linear-gradient(-45deg, #ccc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ccc 75%),
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
  border: 1px solid #ddd;
}
.bg-color-text {
  font-size: 11px;
  color: var(--prem-gray-500, #64748b);
  line-height: 1;
}
.custom-bg-upload-btn .upload-swatch {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f1f5f9;
  border: 1px dashed #cbd5e1;
  font-size: 14px;
  color: var(--prem-gray-400, #94a3b8);
}
.custom-bg-upload-btn .upload-swatch i {
  color: var(--prem-gray-400, #94a3b8);
}
.bg-color-btn .bg-color-swatch img.custom-bg-preview {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

/* 尺寸选择 */
.size-options {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.size-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  padding: 5px 10px;
  border-radius: 8px;
  border: 2px solid var(--prem-gray-100, #e2e8f0);
  background: #fff;
  transition: all 0.2s;
  min-width: 70px;
}
.size-btn.active {
  border-color: var(--prem-accent-purple, #8b5cf6);
  background: rgba(139, 92, 246, 0.08);
}
.size-btn:hover {
  border-color: var(--prem-accent-blue, #3b82f6);
}
.size-btn .size-text {
  font-size: 11px;
  font-weight: 500;
  color: var(--prem-navy-700, #334155);
  white-space: nowrap;
  line-height: 1.3;
}
.size-btn .size-dims {
  font-size: 10px;
  color: var(--prem-gray-400, #94a3b8);
  white-space: nowrap;
}

/* 打印排版选择 */
.print-mode-options {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.print-mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  padding: 8px 14px;
  border-radius: 8px;
  border: 2px solid var(--prem-gray-100, #e2e8f0);
  background: #fff;
  transition: all 0.2s;
  min-width: 80px;
}
.print-mode-btn.active {
  border-color: var(--prem-accent-purple, #8b5cf6);
  background: rgba(139, 92, 246, 0.08);
}
.print-mode-btn:hover {
  border-color: var(--prem-accent-blue, #3b82f6);
}
.print-mode-btn .print-icon {
  font-size: 20px;
  line-height: 1.2;
}
.print-mode-btn .print-text {
  font-size: 12px;
  font-weight: 600;
  color: var(--prem-navy-700, #334155);
  white-space: nowrap;
}
.print-mode-btn .print-dims {
  font-size: 10px;
  color: var(--prem-gray-400, #94a3b8);
  white-space: nowrap;
}

/* 主体占比控制 */
.scale-control {
  display: flex;
  align-items: center;
  gap: 10px;
}
.scale-control input[type="range"] {
  flex: 1;
  height: 6px !important;
  border-radius: 3px !important;
  background: var(--prem-gray-100, #e2e8f0) !important;
  border: none !important;
  box-shadow: none !important;
  margin: 0 !important;
  -webkit-appearance: none;
  appearance: none;
}
.scale-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--prem-accent-purple, #8b5cf6);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.scale-control input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--prem-accent-purple, #8b5cf6);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.scale-input {
  width: 58px !important;
  height: 32px !important;
  padding: 2px 6px !important;
  border: 1px solid var(--prem-gray-200, #cbd5e1) !important;
  border-radius: 6px !important;
  text-align: center !important;
  font-size: 14px !important;
  font-weight: 600 !important;
  color: var(--prem-navy-700, #334155) !important;
  background: var(--prem-gray-50, #f1f5f9) !important;
  outline: none !important;
  -webkit-appearance: none;
  appearance: textfield;
}
.scale-input:focus {
  border-color: var(--prem-accent-purple, #8b5cf6) !important;
  box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.15) !important;
}

.bg-scale-reset-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--prem-gray-200, #cbd5e1);
  border-radius: 6px;
  background: var(--prem-gray-50, #f1f5f9);
  color: var(--prem-navy-600, #475569);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
  flex-shrink: 0;
}
.bg-scale-reset-btn:hover {
  background: var(--prem-gray-100, #e2e8f0);
  border-color: var(--prem-accent-purple, #8b5cf6);
  color: var(--prem-accent-purple, #8b5cf6);
}
.scale-input::-webkit-inner-spin-button,
.scale-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
#scale-value-display,
#batch-scale-value-display,
#bg-scale-value-display {
  color: var(--prem-accent-purple, #8b5cf6);
  font-weight: 700;
  margin-left: auto;
}

/* 批量模式下的选项面板 */
.batch-cutout-options {
  margin-top: 16px;
}

/* ============================================
   Premium Pricing Section
   ============================================ */
.pricing-section {
  position: relative;
  margin-bottom: 32px;
  padding: 40px 32px 48px;
  background: linear-gradient(135deg, var(--prem-navy-900) 0%, var(--prem-navy-700) 50%, var(--prem-navy-800) 100%);
  border-radius: var(--prem-radius-xl);
  box-shadow: var(--prem-shadow-lg);
  overflow: hidden;
}

.pricing-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--prem-gradient-gold);
  z-index: 1;
}

.pricing-section::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(240, 180, 41, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.pricing-header {
  text-align: center;
  margin-bottom: 36px;
  position: relative;
  z-index: 1;
}

.pricing-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--prem-white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.pricing-header h2 i {
  color: var(--prem-gold);
}

.pricing-header p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.95rem;
  max-width: 500px;
  margin: 0 auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
  align-items: stretch;
}

.pricing-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  border-radius: var(--prem-radius-lg);
  padding: 28px 16px 24px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 320px;
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(240, 180, 41, 0.3);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

.pricing-card.popular {
  background: rgba(255, 255, 255, 0.10);
  border-color: var(--prem-gold);
  box-shadow: 0 8px 32px rgba(240, 180, 41, 0.15);
  transform: scale(1.04);
  z-index: 2;
}

.pricing-card.popular:hover {
  transform: scale(1.04) translateY(-6px);
  box-shadow: 0 20px 48px rgba(240, 180, 41, 0.2);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--prem-gradient-gold);
  color: var(--prem-navy-900);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(240, 180, 41, 0.3);
}

.pricing-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--prem-white);
  margin-bottom: 2px;
  letter-spacing: -0.5px;
}

.pricing-price .currency {
  font-size: 1rem;
  font-weight: 600;
  vertical-align: super;
  margin-right: 1px;
}

.pricing-card.popular .pricing-price {
  color: var(--prem-gold);
}

.pricing-original {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.35);
  text-decoration: line-through;
  margin-bottom: 12px;
  min-height: 1.2em;
}

.pricing-points {
  background: rgba(240, 180, 41, 0.12);
  border-radius: 8px;
  padding: 10px 8px;
  margin-bottom: 10px;
}

.pricing-points-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--prem-gold-light);
}

.pricing-points-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 2px;
}

.pricing-card.popular .pricing-points {
  background: rgba(240, 180, 41, 0.18);
}

.pricing-stats {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 10px 0;
  flex: 1;
}

.pricing-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
}

.pricing-stat-label {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.5);
}

.pricing-stat-value {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
}

.pricing-stat-value.highlight {
  color: var(--prem-gold-light);
}

.pricing-btn {
  margin-top: 12px;
  padding: 11px 16px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s;
  background: rgba(255, 255, 255, 0.10);
  color: rgba(255, 255, 255, 0.7);
  width: 100%;
  letter-spacing: 0.3px;
}

.pricing-card:hover .pricing-btn {
  background: var(--prem-gradient-gold);
  color: var(--prem-navy-900);
  box-shadow: 0 4px 14px rgba(240, 180, 41, 0.25);
}

.pricing-card.popular .pricing-btn {
  background: var(--prem-gradient-gold);
  color: var(--prem-navy-900);
  box-shadow: 0 4px 14px rgba(240, 180, 41, 0.25);
}

.pricing-card.popular:hover .pricing-btn {
  box-shadow: 0 6px 20px rgba(240, 180, 41, 0.35);
  transform: translateY(-1px);
}

.pricing-footer-text {
  text-align: center;
  margin-top: 24px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.35);
  position: relative;
  z-index: 1;
}

.pricing-footer-text i {
  margin-right: 4px;
}

.pricing-footer-text a {
  color: var(--prem-gold-light);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.pricing-footer-text a:hover {
  color: var(--prem-gold);
}

/* 永不过期 badge */
.pricing-badge-ever {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00b894, #00cec9);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 184, 148, 0.35);
}

.pricing-card[data-amount="9.9"]:hover {
  border-color: rgba(0, 206, 201, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25), 0 0 20px rgba(0, 206, 201, 0.08);
}

/* 对比文案 */
.pricing-compare {
  text-align: center;
  margin-top: 16px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.04);
  padding: 10px 20px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.pricing-compare i {
  color: var(--prem-gold);
  font-size: 0.85em;
}

.pricing-compare strong {
  color: var(--prem-gold-light);
  font-weight: 700;
}

.pricing-compare-divider {
  color: rgba(255, 255, 255, 0.15);
  margin: 0 6px;
}

/* 批量页推广横幅 */
.batch-promo-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, rgba(240, 180, 41, 0.08), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(240, 180, 41, 0.2);
  border-radius: var(--prem-radius-md);
  padding: 12px 18px;
  margin-bottom: 16px;
  transition: all 0.3s;
}

.batch-promo-banner:hover {
  background: linear-gradient(135deg, rgba(240, 180, 41, 0.12), rgba(255, 255, 255, 0.06));
  border-color: rgba(240, 180, 41, 0.35);
}

.batch-promo-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--prem-gold), var(--prem-gold-dark));
  border-radius: 50%;
  color: var(--prem-navy-900);
  font-size: 16px;
}

.batch-promo-text {
  flex: 1;
  font-size: 0.85rem;
  color: var(--prem-gray-600);
  line-height: 1.5;
}

.batch-promo-text strong {
  color: var(--prem-navy-700);
  font-weight: 700;
}

.batch-promo-text a {
  display: inline-block;
  margin-left: 8px;
  padding: 3px 12px;
  background: linear-gradient(135deg, var(--prem-gold), var(--prem-gold-dark));
  color: var(--prem-navy-900);
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.8rem;
  text-decoration: none;
  transition: all 0.3s;
  white-space: nowrap;
}

.batch-promo-text a:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(240, 180, 41, 0.3);
}

.batch-promo-text a i {
  margin-left: 2px;
  font-size: 0.75rem;
}

/* Pricing mobile responsive */
@media (max-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pricing-card:last-child {
    display: none;
  }
}

@media (max-width: 768px) {
  .pricing-section {
    padding: 28px 16px 36px;
    border-radius: var(--prem-radius-lg);
  }
  .pricing-header h2 {
    font-size: 1.4rem;
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }
  .pricing-card {
    padding: 20px 12px 18px;
    min-height: 280px;
  }
  .pricing-price {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .pricing-card {
    min-height: 260px;
    padding: 16px 10px 14px;
  }
  .pricing-stat {
    flex-direction: column;
    gap: 2px;
    padding: 3px 6px;
  }
}

/* 二次确认弹窗动画 */
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* ============================================
   背景选项 Tab / 搜索 / 效果控制
   ============================================ */
.bg-tab-bar { display: flex; gap: 4px; margin-bottom: 10px; }
.bg-tab-btn { flex: 1; padding: 7px 12px; border: 1px solid var(--prem-gray-100); border-radius: var(--prem-radius-md); background: var(--prem-gray-50); cursor: pointer; font-size: 0.82rem; transition: var(--prem-transition); color: var(--prem-gray-600); }
.bg-tab-btn:hover { background: var(--prem-white); border-color: var(--prem-gray-200); }
.bg-tab-btn.active { background: var(--prem-gradient-gold); color: var(--prem-navy-900); border-color: transparent; font-weight: 600; }
.bg-tab-content { display: none; }
.bg-tab-content.active { display: block; }

.bg-category-tabs { display: flex; gap: 4px; margin-bottom: 8px; flex-wrap: wrap; }
.bg-cat-btn { padding: 4px 12px; border: 1px solid var(--prem-gray-100); border-radius: 14px; background: var(--prem-gray-50); cursor: pointer; font-size: 0.78rem; transition: var(--prem-transition); color: var(--prem-gray-500); }
.bg-cat-btn:hover { background: var(--prem-white); border-color: var(--prem-accent-purple); color: var(--prem-accent-purple); }
.bg-cat-btn.active { background: var(--prem-accent-purple); color: white; border-color: var(--prem-accent-purple); }

.bg-library-search { margin-bottom: 8px; }
.bg-library-search input { width: 100%; padding: 6px 10px; border: 1px solid var(--prem-gray-100); border-radius: var(--prem-radius-sm); font-size: 0.8rem; outline: none; background: var(--prem-gray-50); }
.bg-library-search input:focus { border-color: var(--prem-accent-purple); background: var(--prem-white); }

.bg-search-input-group { display: flex; gap: 6px; margin-bottom: 8px; }
.bg-search-input-group input { flex: 1; padding: 8px 12px; border: 1px solid var(--prem-gray-100); border-radius: var(--prem-radius-sm); font-size: 0.82rem; outline: none; }
.bg-search-input-group input:focus { border-color: var(--prem-accent-purple); }
.bg-search-input-group button { padding: 8px 16px; background: var(--prem-accent-purple); color: white; border: none; border-radius: var(--prem-radius-sm); cursor: pointer; }
.bg-search-input-group button:hover { background: #7c3aed; }

.bg-search-results { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; max-height: 320px; overflow-y: auto; }
.bg-search-result-item { border-radius: var(--prem-radius-sm); overflow: hidden; cursor: pointer; border: 2px solid transparent; transition: var(--prem-transition); }
.bg-search-result-item:hover { border-color: var(--prem-accent-purple); }
.bg-search-result-item.active { border-color: var(--prem-gold); }
.bg-search-result-item img { width: 100%; height: 72px; object-fit: cover; display: block; }
.bg-search-result-item .bg-search-item-info { font-size: 0.65rem; color: var(--prem-gray-400); padding: 2px 6px 4px; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.bg-search-loading { text-align: center; padding: 20px; color: var(--prem-accent-purple); font-size: 0.85rem; }
.bg-search-error { text-align: center; padding: 12px; color: var(--prem-accent-rose); font-size: 0.82rem; background: #fff5f5; border-radius: var(--prem-radius-md); }
.bg-search-pagination { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 8px; }
.bg-search-pagination button { background: var(--prem-gray-50); border: 1px solid var(--prem-gray-100); border-radius: var(--prem-radius-sm); padding: 4px 12px; cursor: pointer; font-size: 0.8rem; color: var(--prem-gray-600); }
.bg-search-pagination button:hover { background: var(--prem-white); border-color: var(--prem-accent-purple); color: var(--prem-accent-purple); }
.bg-search-pagination button:disabled { opacity: 0.4; cursor: default; }

/* 自定义背景栏 */
.custom-bg-bar { margin-top: 8px; }
.custom-bg-preview { display: flex; align-items: center; gap: 8px; padding: 6px; background: var(--prem-gray-50); border-radius: var(--prem-radius-sm); margin-top: 6px; }
.custom-bg-preview img { width: 48px; height: 36px; object-fit: cover; border-radius: 4px; border: 1px solid var(--prem-gray-100); }
.custom-bg-preview span { font-size: 0.75rem; color: var(--prem-accent-purple); cursor: pointer; }
.custom-bg-preview span:hover { text-decoration: underline; }

/* 效果 toggle */
.bg-effect-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.toggle-label { display: flex; align-items: center; gap: 6px; cursor: pointer; font-size: 0.82rem; color: var(--prem-gray-700); user-select: none; }
.toggle-label input[type="checkbox"] { display: none; }
.toggle-switch { width: 34px; height: 18px; background: var(--prem-gray-200); border-radius: 9px; position: relative; transition: background 0.2s; flex-shrink: 0; }
.toggle-switch::after { content: ''; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; background: white; border-radius: 50%; transition: transform 0.2s; }
.toggle-label input:checked + .toggle-switch { background: var(--prem-accent-purple); }
.toggle-label input:checked + .toggle-switch::after { transform: translateX(16px); }
.bg-effect-slider { flex: 1; max-width: 100px; }
.bg-effect-slider input[type="range"] { width: 100%; height: 4px; }
.bg-effect-hint { font-size: 0.72rem; color: var(--prem-gray-400); }
.bg-effect-desc { font-size: 0.72rem; color: var(--prem-gray-400); margin: -4px 0 4px 0; width: 100%; flex-basis: 100%; }

/* ============================================
   背景替换 - 卡片式控制分组
   ============================================ */
.bg-control-card {
  background: var(--prem-white);
  border: 1px solid var(--prem-gray-100);
  border-radius: var(--prem-radius-md);
  overflow: hidden;
  margin-top: 12px;
}
.bg-control-card-header {
  padding: 8px 12px;
  background: var(--prem-gray-50);
  border-bottom: 1px solid var(--prem-gray-100);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--prem-gray-700);
  display: flex;
  align-items: center;
  gap: 6px;
}
.bg-control-card-header i {
  color: var(--prem-accent-purple);
  font-size: 0.85rem;
}
.bg-control-card-body {
  padding: 10px 12px;
}
.bg-control-card-body .cutout-option-section:first-child {
  margin-top: 0;
}