.about-video {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center
}

.video-poster {
    position: relative;
    min-height: 520px;
    overflow: hidden;
    border-radius: 35px;
    background: #ddd
}

.video-poster>img {
    width: 100%;
    height: 100%;
    object-fit: cover
}

.video-poster::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgb(0 0 0/.55))
}

.video-poster>span {
    position: absolute;
    z-index: 2;
    left: 26px;
    bottom: 24px;
    color: white;
    font-weight: 700
}

.play-button {
    position: absolute;
    z-index: 3;
    inset: 50% auto auto 50%;
    width: 80px;
    height: 80px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 50%;
    background: transparent;
    transform: translate(-50%, -50%);
    cursor: pointer;
    transition: transform var(--transition)
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.08)
}

.play-button img {
    width: 70px
}

.story-section h2 {
    max-width: 700px
}

.timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 34px 0 0;
    padding: 0;
    list-style: none
}

.timeline li {
    padding: 24px;
    border-radius: 21px;
    background: var(--color-card);
    box-shadow: var(--shadow-card)
}

.timeline li>span {
    display: block;
    margin-bottom: 28px;
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 800;
    color: var(--color-emerald)
}

.timeline strong {
    display: block;
    margin-bottom: 10px
}

.timeline p {
    margin: 0;
    font-size: 14px
}

.principles {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 50px
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px
}

.principles article {
    padding: 26px;
    border-radius: 21px;
    background: var(--color-card);
    box-shadow: var(--shadow-card)
}

.principles article img {
    width: 38px;
    height: 38px;
    margin-bottom: 22px;
    filter: brightness(0)
}

.principles article h3 {
    font-size: 21px
}

.guarantee-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px
}

.guarantee-section ul {
    display: grid;
    gap: 14px;
    margin: 0;
    padding: 0;
    list-style: none
}

.guarantee-section li {
    padding: 18px 20px 18px 54px;
    border-radius: 16px;
    background: var(--color-card);
    box-shadow: var(--shadow-card);
    position: relative
}

.guarantee-section li::before {
    content: "✓";
    position: absolute;
    left: 20px;
    color: var(--color-emerald);
    font-weight: 900
}

@media(max-width:900px) {

    .about-video,
    .principles,
    .guarantee-section {
        grid-template-columns: 1fr
    }

    .timeline {
        grid-template-columns: repeat(2, 1fr)
    }

    .principles-grid {
        grid-template-columns: 1fr
    }

    .video-poster {
        min-height: 420px
    }
}

@media(max-width:520px) {
    .timeline {
        grid-template-columns: 1fr
    }

    .video-poster {
        min-height: 360px
    }
}