.setting-group {
    background: rgba(245, 245, 245, 0.4);
    padding: 18px;
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.setting-group:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.setting-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.setting-group h3 {
    font-size: 1.3rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.toggle-icon {
    transition: transform 0.3s ease;
}

.setting-group.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.setting-group-content {
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 1;
}

.setting-group.collapsed .setting-group-content {
    max-height: 0;
    opacity: 0;
    pointer-events: none;
}

.setting-section {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.setting-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.setting-section h4 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.setting-desc {
    font-size: 0.9rem;
    color: var(--text);
    opacity: 0.8;
    margin-bottom: 12px;
    line-height: 1.4;
    font-weight: 500;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1rem;
    color: var(--text);
    font-weight: 500;
}

.checkbox-item input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1rem;
    color: var(--text);
    font-weight: 500;
}

.interval-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 10px;
}

.interval-control {
    flex: 1;
    min-width: 200px;
}

.interval-control label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--primary);
    font-size: 1rem;
}

.interval-control input {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid var(--primary);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.5);
    font-size: 1.05rem;
}

.input-with-unit {
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-with-unit input {
    flex: 1;
}

.input-with-unit .unit {
    font-size: 0.9rem;
    color: var(--text);
    opacity: 0.7;
    white-space: nowrap;
}

.background-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.bg-input-group {
    display: flex;
    gap: 10px;
}

.bg-input {
    flex: 1;
    padding: 10px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.5);
}

.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.preset-btn {
    flex: 1;
    min-width: 110px;
    padding: 8px 12px;
    border: none;
    border-radius: 8px;
    background: rgba(110, 142, 251, 0.15);
    color: var(--primary);
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s;
    font-size: 0.95rem;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.preset-btn:hover {
    background: rgba(110, 142, 251, 0.25);
    transform: translateY(-2px);
}

.preset-btn.active {
    background: var(--primary);
    color: white;
}

.action-buttons {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.action-btn {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 8px;
    background: rgba(110, 142, 251, 0.15);
    color: var(--primary);
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s;
    font-size: 1rem;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.action-btn:hover {
    background: rgba(110, 142, 251, 0.25);
    transform: translateY(-2px);
}

.reset-btn {
    background: rgba(255, 107, 107, 0.1);
    color: var(--gaokao-color);
    border: 1px solid var(--gaokao-color);
}

.reset-btn:hover {
    background: rgba(255, 107, 107, 0.2);
}

.type-controls {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.system-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.system-buttons .btn {
    width: 100%;
    justify-content: center;
}

.import-export-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.import-export-buttons .btn {
    flex: 1;
    justify-content: center;
}

.btn-export {
    background: linear-gradient(45deg, #27ae60, #2ecc71);
}

.btn-export:hover {
    background: linear-gradient(45deg, #229954, #27ae60);
}

.btn-import {
    background: linear-gradient(45deg, #3498db, #5dade2);
}

.btn-import:hover {
    background: linear-gradient(45deg, #2980b9, #3498db);
}

.countdowns-form {
    display: grid;
    gap: 12px;
    margin-top: 15px;
}

.form-group {
    display: grid;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
    color: var(--primary);
}

.form-control {
    padding: 10px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.5);
}

.countdowns-list {
    margin-top: 15px;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 5px;
}

.countdowns-list::-webkit-scrollbar {
    width: 6px;
}

.countdowns-list::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

.countdown-item-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.countdown-item-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.countdown-item-title {
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.countdown-item-date {
    font-size: 0.85rem;
    opacity: 0.8;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.countdown-item-actions {
    display: flex;
    gap: 5px;
    flex-shrink: 0;
}

.countdown-edit-btn, .countdown-delete-btn, .countdown-toggle-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
}

.countdown-edit-btn {
    color: var(--primary);
}

.countdown-delete-btn {
    color: var(--accent);
}

.countdown-toggle-btn {
    color: #27ae60;
}

.countdown-toggle-btn.hidden {
    color: #e74c3c;
}

.countdown-edit-btn:hover, .countdown-delete-btn:hover, .countdown-toggle-btn:hover {
    transform: scale(1.1);
    background: rgba(0,0,0,0.05);
}

.subject-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.subject-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.95rem;
}

.subject-item input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.tag-filter-container {
    margin-top: 15px;
    max-height: 200px;
    overflow-y: auto;
    padding: 10px;
    border-radius: 10px;
    background: rgba(0,0,0,0.05);
}

.tag-filter-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tag-filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-filter-item {
    background: rgba(110, 142, 251, 0.15);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tag-filter-item.active {
    background: var(--primary);
    color: white;
}

.style-control {
    margin-top: 10px;
}

.style-control label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--primary);
    font-size: 1rem;
}

.style-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.1);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: all 0.3s ease;
}

.style-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.style-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

.style-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.style-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

/* 主题设置样式 */
.theme-preview {
    width: 100%;
    height: 150px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin: 10px 0;
    background: var(--bg);
    transition: all 0.3s ease;
}

.preview-header {
    height: 30px;
    background: var(--primary);
    display: flex;
    align-items: center;
    padding: 0 10px;
}

.preview-body {
    height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 10px;
    color: var(--text);
}

.preview-time {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    font-family: 'Courier New', monospace;
}

.preview-quote {
    font-size: 1rem;
    font-style: italic;
    text-align: center;
}

.theme-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 10px;
    margin: 10px 0;
}

.theme-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid transparent;
}

.theme-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.theme-card.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(110, 142, 251, 0.3);
}

.theme-color {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-bottom: 8px;
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.theme-color.light {
    background: linear-gradient(45deg, #6e8efb, #a777e3);
}

.theme-color.dark {
    background: linear-gradient(45deg, #1a1a2e, #8aa2ff);
}

.theme-color.ocean {
    background: linear-gradient(45deg, #3498db, #1abc9c);
}

.theme-color.forest {
    background: linear-gradient(45deg, #27ae60, #f39c12);
}

.theme-color.sunset {
    background: linear-gradient(45deg, #e74c3c, #e67e22);
}

.theme-color.midnight {
    background: linear-gradient(45deg, #2c3e50, #8e44ad);
}

.theme-color.sakura {
    background: linear-gradient(45deg, #e84393, #fd79a8);
}

.theme-color.high-contrast {
    background: linear-gradient(45deg, #000000, #ffffff);
}

.theme-color.minimal {
    background: linear-gradient(45deg, #f8f9fa, #6c757d);
}

.theme-color.nature {
    background: linear-gradient(45deg, #556b2f, #98fb98);
}

.theme-card span {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text);
    text-align: center;
}

.theme-info {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin: 10px 0;
}

.theme-info p {
    margin: 5px 0;
    color: var(--text);
}

.theme-info strong {
    color: var(--primary);
}

/* 暗色主题适配 */
.dark-theme .setting-group,
.ocean-theme .setting-group,
.forest-theme .setting-group,
.sunset-theme .setting-group,
.midnight-theme .setting-group,
.sakura-theme .setting-group {
    background: rgba(40, 40, 60, 0.6);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.dark-theme .setting-group .setting-desc,
.midnight-theme .setting-group .setting-desc,
.dark-theme .setting-group .checkbox-item,
.midnight-theme .setting-group .checkbox-item,
.dark-theme .setting-group .radio-item,
.midnight-theme .setting-group .radio-item,
.dark-theme .setting-group .interval-control label,
.midnight-theme .setting-group .interval-control label,
.dark-theme .setting-group .unit,
.midnight-theme .setting-group .unit,
.dark-theme .setting-group .preset-btn,
.midnight-theme .setting-group .preset-btn,
.dark-theme .setting-group .action-btn,
.midnight-theme .setting-group .action-btn,
.dark-theme .setting-group .form-group label,
.midnight-theme .setting-group .form-group label {
    color: #ffffff;
}

.dark-theme .setting-group:hover,
.ocean-theme .setting-group:hover,
.forest-theme .setting-group:hover,
.sunset-theme .setting-group:hover,
.midnight-theme .setting-group:hover,
.sakura-theme .setting-group:hover {
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.dark-theme .setting-section,
.ocean-theme .setting-section,
.forest-theme .setting-section,
.sunset-theme .setting-section,
.midnight-theme .setting-section,
.sakura-theme .setting-section {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.dark-theme .bg-input,
.ocean-theme .bg-input,
.forest-theme .bg-input,
.sunset-theme .bg-input,
.midnight-theme .bg-input,
.sakura-theme .bg-input {
    background: rgba(30, 30, 50, 0.5);
    color: var(--text);
    border-color: #444;
}

.dark-theme .interval-control input,
.ocean-theme .interval-control input,
.forest-theme .interval-control input,
.sunset-theme .interval-control input,
.midnight-theme .interval-control input,
.sakura-theme .interval-control input {
    background: rgba(30, 30, 50, 0.5);
    color: var(--text);
    border-color: var(--secondary);
}

.dark-theme .form-control {
    background: rgba(30, 30, 50, 0.5);
    color: var(--text);
    border-color: #444;
}