:root {
    --primary-gradient: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #667eea 100%);
    --primary-light: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --secondary-gradient: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 50%, #ff6b9d 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --info-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 50%, #2c3e50 100%);
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
}

body {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    min-height: 100vh;
}

.text-gradient {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 30%, #f093fb 70%, #f5576c 100%);
    padding: 60px 0 40px 0;
    position: relative;
    overflow: hidden;
}

    .hero-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%), radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
        opacity: 0.8;
    }

    .hero-section h1 {
        position: relative;
        z-index: 1;
    }

.badge-free {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(17, 153, 142, 0.3);
    display: inline-block;
    margin-bottom: 10px;
}

.feature-badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin: 5px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb {
    background: transparent;
    padding: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    color: var(--gray-500);
}

.converter-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.converter-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px 30px;
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
}

.converter-body {
    padding: 30px;
}

.upload-area {
    border: 3px dashed var(--gray-300);
    border-radius: 15px;
    padding: 60px 30px;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

    .upload-area:hover {
        border-color: #667eea;
        background: linear-gradient(135deg, #fff 0%, #f8fafc 100%);
        transform: translateY(-2px);
    }

    .upload-area.dragover {
        border-color: #667eea;
        background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
        transform: scale(1.02);
    }

.upload-icon {
    font-size: 4rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
}

.file-input {
    display: none;
}

.preview-container {
    margin-top: 30px;
    display: none;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.preview-item {
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    padding: 10px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

    .preview-item:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        border-color: #667eea;
    }

.preview-image {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 10px;
}

.preview-info {
    font-size: 0.85rem;
}

.preview-name {
    font-weight: 600;
    color: var(--gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 5px;
}

.preview-size {
    color: var(--gray-600);
    font-size: 0.8rem;
}

.preview-remove {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.preview-item:hover .preview-remove {
    opacity: 1;
}

.preview-remove:hover {
    transform: scale(1.1);
}

.options-panel {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 15px;
    padding: 25px;
    margin-top: 30px;
    border: 2px solid var(--gray-200);
}

.option-group {
    margin-bottom: 20px;
}

.option-label {
    display: flex;
    align-items: center;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 10px;
}

.option-select {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid var(--gray-300);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

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

.quality-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, #ff6b6b 0%, #ffd93d 50%, #6bcf7f 100%);
    outline: none;
    -webkit-appearance: none;
}

    .quality-slider::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: white;
        cursor: pointer;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        border: 3px solid #667eea;
    }

    .quality-slider::-moz-range-thumb {
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: white;
        cursor: pointer;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        border: 3px solid #667eea;
    }

.quality-value {
    float: right;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 700;
}

.actions-panel {
    display: flex;
    gap: 15px;
    margin-top: 25px;
    flex-wrap: wrap;
}

.btn-action {
    flex: 1;
    min-width: 150px;
    padding: 15px 30px;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

    .btn-action:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }

    .btn-action:active {
        transform: translateY(-1px);
    }

.btn-compress {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-download {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

    .btn-download:disabled {
        background: linear-gradient(135deg, var(--gray-300) 0%, var(--gray-400) 100%);
        cursor: not-allowed;
        transform: none;
    }

.btn-clear {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    color: white;
}

.btn-history {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
}

    .btn-history:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(79, 172, 254, 0.4);
    }

.history-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    color: white;
    border-radius: 12px;
    padding: 2px 8px;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.4);
}

.status-bar {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 12px;
    padding: 20px;
    margin-top: 25px;
    border: 2px solid var(--gray-200);
    display: none;
}

    .status-bar.show {
        display: block;
        animation: slideDown 0.3s ease;
    }

.status-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-icon {
    font-size: 1.5rem;
}

.status-text {
    color: var(--gray-700);
    font-size: 0.95rem;
}

.status-number {
    font-weight: 700;
    color: var(--gray-900);
}

.compression-rate {
    display: inline-block;
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 700;
    margin-left: 8px;
}

.progress-container {
    margin-top: 25px;
    display: none;
}

    .progress-container.show {
        display: block;
        animation: slideDown 0.3s ease;
    }

.progress-bar-custom {
    height: 8px;
    background: var(--gray-200);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 0%;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 历史记录模态框样式 */
.history-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 9999;
    overflow-y: auto;
    animation: fadeIn 0.3s ease;
}

    .history-modal.show {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }

.history-content {
    background: white;
    border-radius: 20px;
    width: 100%;
    max-width: 1000px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

.history-header {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 25px 30px;
    border-radius: 20px 20px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.history-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

    .history-close:hover {
        background: rgba(255, 255, 255, 0.3);
        transform: rotate(90deg);
    }

.history-body {
    padding: 30px;
}

.history-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

    .history-empty i {
        font-size: 4rem;
        margin-bottom: 20px;
        opacity: 0.3;
    }

.history-item {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 2px solid var(--gray-200);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

    .history-item:hover {
        border-color: #4facfe;
        box-shadow: 0 8px 25px rgba(79, 172, 254, 0.15);
        transform: translateY(-2px);
    }

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--gray-200);
}

.history-item-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.history-item-time {
    color: var(--gray-600);
    font-size: 0.9rem;
}

.history-item-stats {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.history-stat {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.85rem;
    color: var(--gray-700);
    font-weight: 600;
}

.history-preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.history-item-actions {
    display: flex;
    gap: 10px;
}

.history-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.history-btn-download {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.history-btn-restore {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.history-btn-delete {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    color: white;
}

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

.history-clear-all {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    transition: all 0.3s ease;
}

    .history-clear-all:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(255, 107, 107, 0.3);
    }

.history-image-wrapper {
    position: relative;
}

    .history-image-wrapper:hover .history-image-download {
        opacity: 1;
    }

.history-image-download {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s ease;
    font-size: 0.85rem;
}

    .history-image-download:hover {
        background: rgba(0, 0, 0, 0.9);
        transform: translate(-50%, -50%) scale(1.1);
    }

@media (max-width: 768px) {
    .history-image-download {
        opacity: 1;
        background: rgba(0, 0, 0, 0.6);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Toast 通知样式 */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
}

.toast {
    background: white;
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    animation: toastSlideIn 0.3s ease;
}

    .toast.success {
        border-left: 4px solid #38ef7d;
    }

    .toast.error {
        border-left: 4px solid #ff6b6b;
    }

.toast-icon {
    font-size: 1.5rem;
}

.toast.success .toast-icon {
    color: #38ef7d;
}

.toast.error .toast-icon {
    color: #ff6b6b;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2px;
}

.toast-message {
    font-size: 0.9rem;
    color: var(--gray-600);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.feature-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid var(--gray-200);
    height: 100%;
}

    .feature-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        border-color: #667eea;
    }

.feature-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.6;
}