:root {
    --primary-color: #00BFFF;
    --text-color: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-color: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --border-color: #E0E0E0;
    --section-padding: 60px 0;
}

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

body {
    font-family: 'Arial', 'Helvetica', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background: var(--bg-color);
}

.about-rd {
    width: 100%;
    padding: 120px 0 var(--section-padding);
    background: var(--bg-color);

}

.about-rd__container {
    max-width: 1200px;
    width: 90%;
    margin: 0 auto;
}

.about-rd__header {
    text-align: center;
    margin-bottom: 60px;
}

.about-rd__title {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 15px;
    letter-spacing: 0.05em;
}

.about-rd__subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    line-height: 1.6;
}

.about-rd__content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
    margin-bottom: 60px;
}

.about-rd__image-wrapper {
    overflow: hidden;
    border-radius: 4px;
}

.about-rd__image {
    width: 100%;
    height: auto;
    display: block;
}

.about-rd__text {
    padding: 0;
}

.about-rd__section-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 10px;
}

.about-rd__section-subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.about-rd__description {
    font-size: 0.7rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 15px;
}

.about-rd__features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 25px;
}

.about-rd__features-column {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.about-rd__feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

.about-rd__feature-check {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.95rem;
}

.about-rd__feature-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.about-rd__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.about-rd__stat {
    text-align: center;
    padding: 20px;
}

.about-rd__stat-value {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}

.about-rd__stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.about-rd__stat-label-secondary {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
}

@media screen and (max-width: 1200px) {
    .about-rd__content {
        gap: 40px;
    }

    .about-rd__stats {
        gap: 25px;
    }

    .about-rd__stat-value {
        font-size: 2.2rem;
    }
}

@media screen and (max-width: 992px) {
    .about-rd__content {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .about-rd__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .about-rd__stat-value {
        font-size: 2rem;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --section-padding: 40px 0;
    }

    .about-rd__title {
        font-size: 1.6rem;
    }

    .about-rd__subtitle {
        font-size: 0.95rem;
    }

    .about-rd__section-title {
        font-size: 1.3rem;
    }

    .about-rd__section-subtitle {
        font-size: 0.95rem;
    }

    .about-rd__description {
        font-size: 0.9rem;
    }

    .about-rd__features {
        grid-template-columns: 1fr;
    }

    .about-rd__stats {
        gap: 20px;
    }

    .about-rd__stat-value {
        font-size: 1.8rem;
    }

    .about-rd__stat-label {
        font-size: 0.85rem;
    }

    .about-rd__stat-label-secondary {
        font-size: 0.8rem;
    }
}

@media screen and (max-width: 480px) {
    :root {
        --section-padding: 30px 0;
    }

    .about-rd__header {
        margin-bottom: 40px;
    }

    .about-rd__title {
        font-size: 1.4rem;
    }

    .about-rd__subtitle {
        font-size: 0.9rem;
    }

    .about-rd__content {
        gap: 25px;
        margin-bottom: 40px;
    }

    .about-rd__section-title {
        font-size: 1.15rem;
    }

    .about-rd__section-subtitle {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    .about-rd__description {
        font-size: 0.85rem;
    }

    .about-rd__features {
        gap: 12px;
        margin-top: 20px;
    }

    .about-rd__feature-text {
        font-size: 0.85rem;
    }

    .about-rd__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding-top: 25px;
    }

    .about-rd__stat {
        padding: 15px;
    }

    .about-rd__stat-value {
        font-size: 1.5rem;
    }

    .about-rd__stat-label {
        font-size: 0.8rem;
    }

    .about-rd__stat-label-secondary {
        font-size: 0.75rem;
    }
}

.quality-control {
    width: 100%;
    padding: var(--section-padding);
    background: var(--bg-color);
}

.quality-control__container {
    max-width: 1200px;
    width: 90%;
    margin: 0 auto;
}

.quality-control__header {
    text-align: center;
    margin-bottom: 50px;
}

.quality-control__title {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 15px;
    letter-spacing: 0.05em;
}

.quality-control__subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.quality-control__content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
    align-items: center;
}

.quality-control__text {
    padding: 0;
}

.quality-control__description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.quality-control__highlights-title {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.quality-control__highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.quality-control__highlights-column {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quality-control__highlight {
    display: flex;
    align-items: center;
    gap: 10px;
}

.quality-control__highlight-check {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.95rem;
}

.quality-control__highlight-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.quality-control__image-wrapper {
    overflow: hidden;
    border-radius: 4px;
}

.quality-control__image {
    width: 100%;
    height: auto;
    display: block;
}

@media screen and (max-width: 1200px) {
    .quality-control__content {
        gap: 40px;
    }
}

@media screen and (max-width: 992px) {
    .quality-control__content {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .quality-control__title {
        font-size: 1.8rem;
    }
}

@media screen and (max-width: 768px) {
    .quality-control__header {
        margin-bottom: 40px;
    }

    .quality-control__title {
        font-size: 1.5rem;
    }

    .quality-control__subtitle {
        font-size: 0.9rem;
    }

    .quality-control__description {
        font-size: 0.9rem;
        margin-bottom: 25px;
    }

    .quality-control__highlights-title {
        font-size: 1rem;
    }

    .quality-control__highlights {
        grid-template-columns: 1fr;
    }

    .quality-control__highlight-text {
        font-size: 0.85rem;
    }
}

@media screen and (max-width: 480px) {
    .quality-control__header {
        margin-bottom: 30px;
    }

    .quality-control__title {
        font-size: 1.3rem;
    }

    .quality-control__subtitle {
        font-size: 0.85rem;
    }

    .quality-control__content {
        gap: 25px;
    }

    .quality-control__description {
        font-size: 0.85rem;
        margin-bottom: 20px;
    }

    .quality-control__highlights-title {
        font-size: 0.95rem;
        margin-bottom: 15px;
    }

    .quality-control__highlights {
        gap: 12px;
    }

    .quality-control__highlight-text {
        font-size: 0.8rem;
    }
}

.qc-process {
    width: 100%;
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.qc-process__container {
    max-width: 1200px;
    width: 90%;
    margin: 0 auto;
}

.qc-process__header {
    text-align: center;
    margin-bottom: 50px;
}

.qc-process__title {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 15px;
    letter-spacing: 0.05em;
}

.qc-process__subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.qc-process__steps {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.qc-process__step {
    display: flex;
    align-items: center;
    padding: 18px 20px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid #E0E0E0;
}

.qc-process__step:first-child {
    border-top: 1px solid #E0E0E0;
}

.qc-process__step:hover {
    background-color: #C6ECF6;
}

.qc-process__step--active {
    background-color: #E0F4FF;
}

.qc-process__step--active:hover {
    background-color: #C6ECF6;
}

.qc-process__step-bar {
    width: 4px;
    height: 24px;
    background-color: var(--primary-color);
    margin-right: 20px;
    flex-shrink: 0;
}

.qc-process__step--active .qc-process__step-bar {
    background-color: var(--primary-color);
}

.qc-process__step-text {
    font-size: 0.95rem;
    color: var(--text-color);
    letter-spacing: 0.02em;
}

.qc-process__step--active .qc-process__step-text {
    font-weight: 600;
}

@media screen and (max-width: 1200px) {
    .qc-process__title {
        font-size: 1.8rem;
    }
}

@media screen and (max-width: 992px) {
    .qc-process__title {
        font-size: 1.6rem;
    }

    .qc-process__subtitle {
        font-size: 0.9rem;
    }

    .qc-process__step {
        padding: 15px 15px;
    }

    .qc-process__step-bar {
        width: 3px;
        height: 20px;
        margin-right: 15px;
    }

    .qc-process__step-text {
        font-size: 0.9rem;
    }
}

@media screen and (max-width: 768px) {
    .qc-process__header {
        margin-bottom: 40px;
    }

    .qc-process__title {
        font-size: 1.4rem;
    }

    .qc-process__subtitle {
        font-size: 0.85rem;
    }

    .qc-process__step {
        padding: 12px 15px;
    }

    .qc-process__step-bar {
        width: 3px;
        height: 18px;
        margin-right: 12px;
    }

    .qc-process__step-text {
        font-size: 0.85rem;
    }
}

@media screen and (max-width: 480px) {
    .qc-process__header {
        margin-bottom: 30px;
    }

    .qc-process__title {
        font-size: 1.2rem;
    }

    .qc-process__subtitle {
        font-size: 0.8rem;
    }

    .qc-process__step {
        padding: 10px 12px;
    }

    .qc-process__step-bar {
        width: 2px;
        height: 16px;
        margin-right: 10px;
    }

    .qc-process__step-text {
        font-size: 0.8rem;
    }
}