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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M 20 0 L 0 0 0 20" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

header h1 {
    font-size: 2.2em;
    margin-bottom: 10px;
    font-weight: 700;
    color: white;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 1em;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
}

main {
    padding: 30px;
}

@media (max-width: 768px) {
    main {
        padding: 20px;
    }
}

/* 信息部分样式 */
.info-section {
    margin-top: 30px;
    margin-bottom: 30px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.info-card {
    background: white;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
}

.info-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.info-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    border-bottom: 1px solid #e5e7eb;
}

.info-icon {
    font-size: 1.5em;
    line-height: 1;
}

.info-card-header h3 {
    color: #1f2937;
    font-size: 1.1em;
    font-weight: 600;
    margin: 0;
}

.info-card-content {
    padding: 20px;
}

.feature-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
}

.feature-item:last-child {
    border-bottom: none;
}

.feature-label {
    font-weight: 600;
    color: #374151;
    font-size: 0.9em;
}

.feature-desc {
    color: #6b7280;
    font-size: 0.85em;
    line-height: 1.5;
}

.step-item {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid #f3f4f6;
}

.step-item:last-child {
    border-bottom: none;
}

.step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.95em;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.step-content {
    flex: 1;
}

.step-content strong {
    display: block;
    color: #374151;
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 0.9em;
}

.step-content p {
    color: #6b7280;
    font-size: 0.85em;
    line-height: 1.5;
    margin: 0;
}

/* FAQ 部分 */
.faq-section {
    background: white;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    padding: 24px;
}

.faq-title {
    color: #1f2937;
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid #e5e7eb;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    background: white;
}

.faq-item.active {
    border-color: #667eea;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.15);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: white;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 0.95em;
    font-weight: 500;
    color: #374151;
    transition: all 0.2s ease;
}

.faq-question:hover {
    background: #f9fafb;
}

.faq-question span {
    flex: 1;
}

.faq-icon {
    flex-shrink: 0;
    margin-left: 12px;
    color: #9ca3af;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    color: #667eea;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 20px 16px 20px;
    color: #6b7280;
    font-size: 0.9em;
    line-height: 1.6;
    margin: 0;
}

.upload-section {
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed #d1d5db;
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.05), transparent);
    transition: left 0.5s;
}

.upload-area:hover::before {
    left: 100%;
}

.upload-area:hover {
    border-color: #667eea;
    background: linear-gradient(135deg, #f0f2ff 0%, #ffffff 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

.upload-area.dragover {
    border-color: #667eea;
    background: linear-gradient(135deg, #eef2ff 0%, #f0f2ff 100%);
    border-style: solid;
    transform: scale(1.02);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.2);
}

.upload-icon {
    margin-bottom: 20px;
    color: #9ca3af;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.upload-area:hover .upload-icon {
    color: #667eea;
    transform: translateY(-4px) scale(1.1);
}

.upload-text {
    font-size: 1.1em;
    font-weight: 500;
    color: #374151;
    margin-bottom: 8px;
}

.upload-hint {
    color: #6b7280;
    font-size: 0.875em;
}

.config-section {
    background: white;
    padding: 28px;
    border-radius: 12px;
    margin-bottom: 24px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
}

.config-section:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.config-group {
    margin-bottom: 24px;
}

.config-group:last-child {
    margin-bottom: 0;
}

.config-label {
    display: block;
    font-weight: 500;
    color: #374151;
    margin-bottom: 12px;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.brand-selector,
.table-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.brand-option,
.table-option {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    font-size: 0.9em;
    position: relative;
    overflow: hidden;
}

.brand-option::before,
.table-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.5s;
}

.brand-option:hover::before,
.table-option:hover::before {
    left: 100%;
}

.brand-option:hover,
.table-option:hover {
    border-color: #667eea;
    background: #eef2ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.brand-option input[type="radio"],
.table-option input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
    accent-color: #667eea;
}

.brand-option input[type="radio"]:checked + span,
.table-option input[type="checkbox"]:checked + span {
    font-weight: 600;
    color: #667eea;
}

.brand-option input[type="radio"]:checked ~ span,
.table-option input[type="checkbox"]:checked ~ span {
    font-weight: 600;
    color: #667eea;
}

/* 选中状态的样式 */
.brand-option input[type="radio"]:checked {
    accent-color: #667eea;
}

.table-option input[type="checkbox"]:checked {
    accent-color: #667eea;
}

/* 使用JavaScript动态添加选中类，这里提供基础样式 */
.brand-option.selected,
.table-option.selected {
    border-color: #667eea;
    background: linear-gradient(135deg, #eef2ff 0%, #f0f2ff 100%);
    color: #667eea;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
    font-weight: 600;
}

.controls-section {
    background: white;
    padding: 28px;
    border-radius: 12px;
    margin-bottom: 24px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
}

.controls-section:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.control-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-item label {
    font-weight: 500;
    color: #374151;
    font-size: 0.875em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-value {
    font-weight: 600;
    color: #667eea;
    min-width: 35px;
    text-align: right;
    font-size: 0.9em;
}

.control-item select {
    padding: 8px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    font-size: 0.9em;
    background: white;
    cursor: pointer;
    transition: all 0.2s ease;
    color: #374151;
}

.control-item select:hover {
    border-color: #667eea;
}

.control-item select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.control-item input[type="range"] {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right, #e5e7eb 0%, #e5e7eb 100%);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: all 0.3s ease;
}

.control-item input[type="range"]:hover {
    background: linear-gradient(to right, #d1d5db 0%, #d1d5db 100%);
}

.control-item input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.control-item input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
}

.control-item input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.control-item input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
}

/* 开关样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-switch {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #d1d5db;
    transition: 0.3s;
    border-radius: 24px;
}

.slider-switch:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

.switch input:checked + .slider-switch {
    background-color: #667eea;
}

.switch input:checked + .slider-switch:before {
    transform: translateX(20px);
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 100%;
    margin-top: 0;
    padding: 16px 24px;
    font-size: 1em;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, #5568d3 0%, #6a3d8a 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.btn-download {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(40, 167, 69, 0.3);
    font-weight: 600;
}

.btn-download:hover {
    background: linear-gradient(135deg, #218838 0%, #1ea87e 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(40, 167, 69, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(108, 117, 125, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #5a6268 0%, #495057 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(108, 117, 125, 0.4);
}

.result-section {
    margin-top: 24px;
}

.result-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 20px;
    margin-bottom: 20px;
}

footer {
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    color: #6b7280;
    padding: 24px;
    text-align: center;
    margin-top: 0;
    border-top: 1px solid #e5e7eb;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    margin: 0;
    font-size: 0.95em;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .result-container {
        grid-template-columns: 1fr;
    }
    
    footer {
        padding: 15px;
    }
    
    .footer-content p {
        font-size: 0.85em;
    }
}

.result-image-wrapper {
    text-align: center;
    background: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    border: 1px solid #e5e7eb;
}

.preview-image-wrapper,
.pattern-image-wrapper {
    text-align: center;
}

.preview-image-wrapper h3,
.pattern-image-wrapper h3 {
    margin-bottom: 12px;
    color: #374151;
    font-size: 1em;
    font-weight: 600;
}

.result-image-wrapper h3 {
    margin-bottom: 15px;
    color: #333;
    font-size: 1.1em;
    font-weight: 600;
}

.canvas-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: auto;
    max-height: 80vh;
    max-width: 100%;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 12px;
}

#previewCanvas,
#resultCanvas {
    display: block;
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    margin: 0 auto;
}

.color-stats {
    background: white;
    border-radius: 8px;
    padding: 20px;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid #e5e7eb;
}

.color-stats h3 {
    margin-bottom: 15px;
    color: #333;
    font-size: 1.2em;
}

.total-count {
    margin-bottom: 20px;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}

.total-beads {
    color: white;
    font-size: 1.1em;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.total-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.total-beads strong {
    font-size: 1.5em;
    font-weight: 700;
    margin: 0 5px;
}

#colorList {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.color-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: #f9fafb;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.color-item:hover {
    background: #f3f4f6;
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    border: 1px solid #e5e7eb;
    flex-shrink: 0;
}

.color-info {
    flex: 1;
}

.color-name {
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.color-count {
    font-size: 0.9em;
    color: #666;
}

.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.action-buttons .btn {
    flex: 1;
    max-width: 200px;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 8px;
    }
    
    header {
        padding: 24px 16px;
    }
    
    header h1 {
        font-size: 1.5em;
    }
    
    .subtitle {
        font-size: 0.875em;
    }
    
    main {
        padding: 20px 16px;
    }
    
    .upload-area {
        padding: 40px 16px;
    }
    
    .upload-text {
        font-size: 1em;
    }
    
    .config-section,
    .controls-section {
        padding: 20px 16px;
    }
    
    .config-label {
        font-size: 0.8em;
        margin-bottom: 10px;
    }
    
    .brand-selector,
    .table-selector {
        gap: 8px;
    }
    
    .brand-option,
    .table-option {
        padding: 6px 12px;
        font-size: 0.85em;
    }
    
    .controls-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .control-item label {
        font-size: 0.8em;
    }
    
    .result-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .result-image-wrapper {
        padding: 15px;
    }
    
    .preview-image-wrapper h3,
    .pattern-image-wrapper h3 {
        font-size: 1em;
        margin-bottom: 10px;
    }
    
    .canvas-container {
        padding: 8px;
        max-height: 70vh;
    }
    
    .color-stats {
        padding: 15px;
        max-height: 70vh;
    }
    
    .color-stats h3 {
        font-size: 1.1em;
        margin-bottom: 12px;
    }
    
    .total-count {
        padding: 12px;
    }
    
    .total-beads {
        font-size: 1em;
    }
    
    .total-beads strong {
        font-size: 1.3em;
    }
    
    .color-item {
        padding: 8px;
        gap: 10px;
    }
    
    .color-swatch {
        width: 35px;
        height: 35px;
    }
    
    .color-name {
        font-size: 0.95em;
    }
    
    .color-count {
        font-size: 0.85em;
    }
    
    .action-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .action-buttons .btn {
        max-width: 100%;
        padding: 14px 20px;
        font-size: 1em;
    }
    
    footer {
        padding: 15px;
        margin-top: 20px;
    }
    
    .footer-content p {
        font-size: 0.8em;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .info-card-header {
        padding: 16px;
    }
    
    .info-card-content {
        padding: 16px;
    }
    
    .feature-item {
        padding: 10px 0;
    }
    
    .step-item {
        padding: 12px 0;
    }
    
    .step-number {
        width: 28px;
        height: 28px;
        font-size: 0.85em;
    }
    
    .faq-section {
        padding: 20px;
    }
    
    .faq-question {
        padding: 14px 16px;
        font-size: 0.9em;
    }
    
    .faq-answer p {
        padding: 0 16px 14px 16px;
        font-size: 0.85em;
    }
    
    .result-container {
        grid-template-columns: 1fr;
    }
    
    .color-stats {
        max-height: none;
    }
}