.feature-card-icon.doubao-icon {
        background: linear-gradient(135deg, #4f6ef7 0%, #7c5cfc 100%);
    }
    .feature-card-btn.doubao-btn {
        background: linear-gradient(135deg, #4f6ef7 0%, #7c5cfc 100%);
    }
    .db-video-wrap {
        background: #0f172a;
        border-radius: 14px;
        overflow: hidden;
        margin-bottom: 12px;
        line-height: 0;
    }
    .db-video {
        width: 100%;
        max-height: 480px;
        display: block;
        margin: 0 auto;
        outline: none;
        background: #0f172a;
    }
    .db-chips {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 12px;
    }
    .db-chip {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(79, 110, 247, 0.08);
        color: #1e293b;
        font-size: 0.8rem;
        padding: 6px 12px;
        border-radius: 999px;
    }
    .db-chip i {
        color: #4f6ef7;
    }
    .db-prompt {
        background: rgba(79, 110, 247, 0.06);
        border-left: 3px solid #4f6ef7;
        border-radius: 8px;
        padding: 10px 14px;
        margin-bottom: 12px;
    }
    .db-prompt-title {
        font-size: 0.8rem;
        font-weight: 700;
        color: #4f6ef7;
        margin-bottom: 4px;
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .db-prompt p {
        margin: 0;
        font-size: 0.84rem;
        color: #475569;
        line-height: 1.7;
        word-break: break-all;
    }
    .db-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }
    .db-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        border: none;
        font-size: 0.86rem;
        font-weight: 600;
        padding: 10px 18px;
        border-radius: 12px;
        cursor: pointer;
        transition: all 0.25s;
    }
    .db-btn-primary {
        background: linear-gradient(135deg, #4f6ef7 0%, #7c5cfc 100%);
        color: #fff;
    }
    .db-btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(79, 110, 247, 0.35);
        color: #fff;
    }
    .db-btn-ghost {
        background: #fff;
        color: #4f6ef7;
        border: 1px solid rgba(79, 110, 247, 0.4);
    }
    .db-btn-ghost:hover {
        background: rgba(79, 110, 247, 0.08);
        color: #4f6ef7;
    }