:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-accent: #8b5cf6;
  --color-gold: #f59e0b;
  --color-green: #10b981;
  --color-red: #ef4444;
  --bg-overlay: rgba(15, 23, 42, 0.78);
  --card-bg: rgba(30, 41, 59, 0.75);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover-border: rgba(99, 102, 241, 0.45);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --glass-blur: blur(10px);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: #0b0f19;
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
  overflow-x: clip;
  transition: background-image 0.5s ease-in-out, background-color 0.3s ease, color 0.3s ease;
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  background-repeat: no-repeat;
}

/* 动态背景蒙版 */
.bg-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(30, 58, 138, 0.35) 0%, rgba(106, 117, 182, 0.88) 75%);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  z-index: 0;
  pointer-events: none;
}

/* 顶部通栏导航栏（贴合顶部、全屏通栏、吸顶跟随） */
.header-bar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  padding: 12px 0;
  background: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.22);
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

/* 主容器 */
.layout-container {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: #fff;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.brand-info h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(90deg, #fff, #93c5fd);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-info p {
  font-size: 13px;
  color: var(--text-muted);
}

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

/* 按钮通用 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
  color: #fff;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
  background: linear-gradient(135deg, #059669, #047857);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* 用户状态徽章 */
.auth-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 13px;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.auth-badge.locked {
  background: rgba(239, 68, 68, 0.12);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.25);
}

/* 广播通知横幅 */
.notice-banner {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: #c7d2fe;
}

.notice-banner i {
  font-size: 20px;
  color: #818cf8;
}

/* 秘钥解锁引导横幅 (未授权状态) */
.unlock-hero {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.85), rgba(15, 23, 42, 0.95));
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
}

.unlock-hero-text h3 {
  font-size: 20px;
  margin-bottom: 6px;
  color: #fbbf24;
  display: flex;
  align-items: center;
  gap: 10px;
}

.unlock-hero-text p {
  font-size: 14px;
  color: var(--text-muted);
}

.unlock-hero-form {
  display: flex;
  gap: 10px;
  min-width: 380px;
}

.input-key {
  flex: 1;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.input-key:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

/* 页签切换导航（全新模块化交互设计） */
.tabs-module-wrapper {
  margin-bottom: 28px;
}

.tabs-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding: 0 6px;
}

.tabs-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #93c5fd;
  text-transform: uppercase;
}

.tabs-header-title i {
  font-size: 17px;
  color: #60a5fa;
}

.tabs-header-tip {
  font-size: 12px;
  color: var(--text-dim);
}

.tabs-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  padding: 10px;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.5), 0 12px 30px -8px rgba(0, 0, 0, 0.4);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.tab-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: transparent;
  border: 1.5px solid transparent;
  border-radius: 14px;
  cursor: pointer;
  text-align: left;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
  color: var(--text-muted);
  opacity: 0.72;
}

.tab-btn:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
  color: var(--text-main);
}

.tab-btn.active {
  opacity: 1;
  background: linear-gradient(135deg, #1d4ed8 0%, #3730a3 100%);
  border: 1.5px solid rgba(147, 197, 253, 0.5);
  box-shadow: 0 10px 25px -4px rgba(37, 99, 235, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
  color: #fff;
}

.tab-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
  transition: all 0.25s ease;
  background: rgba(255, 255, 255, 0.06);
  color: #94a3b8;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.tab-btn:hover .tab-icon-box {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.tab-btn.active .tab-icon-box {
  background: rgba(255, 255, 255, 0.22);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.tab-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.tab-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.tab-title {
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--text-main);
  transition: color 0.2s ease;
}

.tab-btn.active .tab-title {
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.tab-count {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 9999px;
  white-space: nowrap;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.tab-btn.active .tab-count {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.tab-btn .badge-guide {
  background: rgba(245, 158, 11, 0.2);
  color: #fde68a;
  border-color: rgba(245, 158, 11, 0.3);
}

.tab-btn.active .badge-guide {
  background: #f59e0b;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.4);
}

.tab-subtitle {
  font-size: 12px;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.tab-btn.active .tab-subtitle {
  color: rgba(224, 231, 255, 0.92);
  font-weight: 500;
}

/* 正在浏览 - 激活状态醒目标识 */
.tab-active-indicator {
  display: none;
}

.tab-btn.active .tab-active-indicator {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  position: absolute;
  top: -10px;
  right: 14px;
  background: linear-gradient(135deg, #059669, #10b981);
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 9999px;
  box-shadow: 0 4px 10px rgba(5, 150, 105, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.35);
  letter-spacing: 0.3px;
  animation: tabIndicatorPulse 2.4s ease-in-out infinite;
}

.indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 6px #ffffff;
  display: inline-block;
}

.indicator-text {
  line-height: 1;
}

@keyframes tabIndicatorPulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 4px 10px rgba(5, 150, 105, 0.45);
  }
  50% {
    transform: scale(1.04);
    box-shadow: 0 6px 14px rgba(16, 185, 129, 0.65);
  }
}

/* 页签内容区 */
.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 资源网格列表 */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
}

.resource-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.resource-card:hover {
  transform: translateY(-3px);
  border-color: var(--card-hover-border);
  box-shadow: 0 12px 30px -10px rgba(99, 102, 241, 0.25);
}

.resource-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, #3b82f6, #8b5cf6);
  opacity: 0.7;
}

.resource-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.category-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #60a5fa;
  flex-shrink: 0;
}

.resource-meta {
  flex: 1;
}

.resource-tags {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge-blue { background: rgba(59, 130, 246, 0.18); color: #93c5fd; }
.badge-purple { background: rgba(168, 85, 247, 0.18); color: #d8b4fe; }
.badge-gold { background: rgba(245, 158, 11, 0.18); color: #fde68a; }
.badge-red { background: rgba(239, 68, 68, 0.18); color: #fca5a5; }
.badge-green { background: rgba(16, 185, 129, 0.18); color: #86efac; }
.badge-pink { background: rgba(236, 72, 153, 0.18); color: #fbcfe8; }
.badge-cyan { background: rgba(6, 182, 212, 0.18); color: #a5f3fc; }
.badge-teal { background: rgba(20, 184, 166, 0.18); color: #99f6e4; }
.badge-hot { background: linear-gradient(135deg, #f59e0b, #ef4444); color: #fff; font-weight: bold; }

.resource-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  word-break: break-word;
}

.resource-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 18px;
  line-height: 1.5;
}

/* 下载行动区 */
.resource-action {
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* 未解锁状态卡片 */
.locked-box {
  background: rgba(15, 23, 42, 0.65);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.locked-box p {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 已解锁状态下载信息 */
.unlocked-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pwd-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(15, 23, 42, 0.7);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.pwd-bar span.code {
  font-family: monospace;
  font-weight: 700;
  font-size: 15px;
  color: #fbbf24;
  letter-spacing: 1px;
}

.action-buttons {
  display: flex;
  gap: 8px;
}

.action-buttons .btn {
  flex: 1;
}

/* 夸克网盘空状态 */
.empty-state {
  background: var(--card-bg);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 60px 20px;
  text-align: center;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.empty-state i {
  font-size: 56px;
  color: #818cf8;
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto;
}

/* 帮助与说明卡片 */
.help-section {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.help-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.help-card h3 {
  font-size: 18px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #93c5fd;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 14px 18px;
  background: rgba(15, 23, 42, 0.5);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #3b82f6;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.step-body h4 {
  font-size: 15px;
  margin-bottom: 4px;
}

.step-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.12);
  border-left: 4px solid #f59e0b;
  padding: 12px 16px;
  border-radius: 4px;
  font-size: 13px;
  color: #fde68a;
  margin-top: 8px;
}

.player-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 10px;
}

.player-item {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.player-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.player-header i {
  font-size: 28px;
  color: #a78bfa;
}

/* 换背景控制面板（浮动或顶栏控制） */
.bg-picker-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.bg-picker-modal.active {
  display: flex;
}

.bg-picker-card {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.bg-picker-card h3 {
  font-size: 18px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bg-picker-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.bg-thumb {
  height: 90px;
  border-radius: 8px;
  cursor: pointer;
  background-size: cover;
  background-position: center;
  border: 2px solid transparent;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.bg-thumb:hover {
  transform: scale(1.03);
  border-color: #3b82f6;
}

.bg-thumb.active {
  border-color: #60a5fa;
  box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.5);
}

.bg-thumb span {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.65);
  font-size: 11px;
  padding: 3px 6px;
  text-align: center;
}

/* 模态弹窗 */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 999;
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-box {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  max-width: 440px;
  width: 100%;
  padding: 28px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

/* Toast 提示消息 */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 260px;
  max-width: 360px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  animation: slideIn 0.25s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-success { background: #059669; }
.toast-error { background: #dc2626; }
.toast-info { background: #2563eb; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* 响应式适配 */
@media (max-width: 768px) {
  .header-bar {
    padding: 10px 0;
  }
  .header-inner {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
    text-align: center;
    padding: 0 16px;
  }
  .brand {
    justify-content: center;
  }
  .header-actions {
    justify-content: center;
    flex-wrap: wrap;
  }
  .unlock-hero {
    flex-direction: column;
    align-items: stretch;
  }
  .unlock-hero-form {
    min-width: unset;
    flex-direction: column;
  }
  .resource-grid {
    grid-template-columns: 1fr;
  }
  .tabs-nav {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 8px;
  }
  .tab-btn {
    padding: 12px 14px;
  }
  .bg-picker-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   日间浅色风格 (Light Theme)
   ========================================================================== */
[data-theme="light"] {
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-accent: #7c3aed;
  --bg-overlay: rgba(241, 245, 249, 0.88);
  --card-bg: rgba(255, 255, 255, 0.92);
  --card-border: rgba(226, 232, 240, 0.9);
  --card-hover-border: rgba(99, 102, 241, 0.45);
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] body {
  background-color: #f1f5f9;
  color: var(--text-main);
}

[data-theme="light"] .bg-overlay {
  background: radial-gradient(circle at 50% 0%, rgba(219, 234, 254, 0.8) 0%, rgba(241, 245, 249, 0.95) 75%);
}

[data-theme="light"] .header-bar {
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .brand-info h1 {
  background: linear-gradient(90deg, #1e293b, #2563eb);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .btn-secondary {
  background: rgba(241, 245, 249, 0.95);
  border: 1px solid rgba(203, 213, 225, 0.85);
  color: var(--text-main);
}

[data-theme="light"] .btn-secondary:hover {
  background: rgba(226, 232, 240, 0.95);
}

[data-theme="light"] .auth-badge {
  background: rgba(16, 185, 129, 0.12);
  color: #047857;
  border-color: rgba(16, 185, 129, 0.3);
}

[data-theme="light"] .auth-badge.locked {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border-color: rgba(239, 68, 68, 0.25);
}

[data-theme="light"] .notice-banner {
  background: linear-gradient(90deg, rgba(239, 246, 255, 0.95), rgba(243, 232, 255, 0.95));
  border: 1px solid rgba(199, 210, 254, 0.85);
  color: #3730a3;
}

[data-theme="light"] .notice-banner i {
  color: #4f46e5;
}

[data-theme="light"] .unlock-hero {
  background: linear-gradient(135deg, #ffffff, #f8fafc);
  border: 1px solid rgba(245, 158, 11, 0.35);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .unlock-hero-text h3 {
  color: #d97706;
}

[data-theme="light"] .input-key {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #0f172a;
}

[data-theme="light"] .input-key:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* 浅色主题下的页签导航 */
[data-theme="light"] .tabs-header-title {
  color: #1e40af;
}

[data-theme="light"] .tabs-header-title i {
  color: #2563eb;
}

[data-theme="light"] .tabs-header-tip {
  color: #64748b;
}

[data-theme="light"] .tabs-nav {
  background: #e2e8f0;
  border-color: #cbd5e1;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.08), 0 8px 24px -4px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .tab-btn {
  color: #475569;
  opacity: 0.78;
}

[data-theme="light"] .tab-btn:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(203, 213, 225, 0.9);
  color: #0f172a;
}

[data-theme="light"] .tab-btn.active {
  opacity: 1;
  background: #ffffff;
  color: #1e3a8a;
  border: 1.5px solid #3b82f6;
  box-shadow: 0 8px 20px -3px rgba(37, 99, 235, 0.22), 0 2px 6px rgba(0, 0, 0, 0.04);
  transform: translateY(-2px);
}

[data-theme="light"] .tab-icon-box {
  background: rgba(255, 255, 255, 0.85);
  border-color: #cbd5e1;
  color: #64748b;
}

[data-theme="light"] .tab-btn:hover .tab-icon-box {
  color: #1e293b;
  border-color: #94a3b8;
}

[data-theme="light"] .tab-btn.active .tab-icon-box {
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

[data-theme="light"] .tab-title {
  color: #1e293b;
}

[data-theme="light"] .tab-btn.active .tab-title {
  color: #1e3a8a;
  text-shadow: none;
}

[data-theme="light"] .tab-btn.active .tab-subtitle {
  color: #2563eb;
}

[data-theme="light"] .tab-btn:not(.active) .tab-count {
  background: rgba(0, 0, 0, 0.06);
  color: #475569;
  border-color: rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .tab-btn.active .tab-count {
  background: rgba(37, 99, 235, 0.12);
  color: #1d4ed8;
  border-color: rgba(37, 99, 235, 0.25);
}

[data-theme="light"] .tab-btn:not(.active) .badge-guide {
  background: rgba(245, 158, 11, 0.15);
  color: #b45309;
  border-color: rgba(245, 158, 11, 0.3);
}

[data-theme="light"] .tab-btn.active .badge-guide {
  background: #f59e0b;
  color: #ffffff;
  border-color: rgba(245, 158, 11, 0.4);
}

[data-theme="light"] .tab-btn.active .tab-active-indicator {
  box-shadow: 0 4px 10px rgba(5, 150, 105, 0.35);
}

[data-theme="light"] .category-icon-wrapper {
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: #2563eb;
}

[data-theme="light"] .resource-action {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .locked-box {
  background: rgba(241, 245, 249, 0.7);
  border: 1px dashed rgba(203, 213, 225, 0.9);
}

[data-theme="light"] .pwd-bar {
  background: rgba(241, 245, 249, 0.9);
  border: 1px solid rgba(203, 213, 225, 0.85);
}

[data-theme="light"] .pwd-bar span.code {
  color: #b45309;
}

[data-theme="light"] .empty-state {
  border-color: rgba(203, 213, 225, 0.9);
}

[data-theme="light"] .help-card h3 {
  color: #1d4ed8;
}

[data-theme="light"] .step-item {
  background: rgba(248, 250, 252, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.9);
}

[data-theme="light"] .player-item {
  background: rgba(248, 250, 252, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.9);
}

[data-theme="light"] .alert-warning {
  background: rgba(254, 243, 199, 0.7);
  color: #92400e;
}

[data-theme="light"] .modal-box,
[data-theme="light"] .bg-picker-card {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  color: #0f172a;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .badge-blue { background: rgba(59, 130, 246, 0.12); color: #1d4ed8; }
[data-theme="light"] .badge-purple { background: rgba(168, 85, 247, 0.12); color: #6b21a8; }
[data-theme="light"] .badge-gold { background: rgba(245, 158, 11, 0.15); color: #b45309; }
[data-theme="light"] .badge-red { background: rgba(239, 68, 68, 0.12); color: #b91c1c; }
[data-theme="light"] .badge-green { background: rgba(16, 185, 129, 0.15); color: #047857; }
[data-theme="light"] .badge-pink { background: rgba(236, 72, 153, 0.12); color: #be185d; }
[data-theme="light"] .badge-cyan { background: rgba(6, 182, 212, 0.15); color: #0e7490; }
[data-theme="light"] .badge-teal { background: rgba(20, 184, 166, 0.15); color: #0f766e; }