/* ===== 图文三栏展示卡片（feature-showcase）===== */
.f-feature-showcase__header {
    text-align: center;
    margin-bottom: clamp(30px, 4vw, 60px);
}

.f-feature-showcase__subheading {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 13px;
    font-weight: 700;
    color: rgb(var(--color-button));
}

.f-feature-showcase__heading {
    margin: 0;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.15;
    color: rgb(var(--color-heading));
}

/* PC：左 / 中 / 右 三栏 */
.f-feature-showcase__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: stretch;
}

.f-feature-showcase__col {
    display: flex;
    flex-direction: column;
    gap: clamp(36px, 4vw, 52px);
}

.f-feature-showcase__module {
    position: relative;
    flex: 1 1 0;
    background: rgb(var(--color-background));
    border: 1px solid rgb(var(--color-border));
    border-radius: 14px;
    padding: 48px 24px 24px;
    min-width: 0;
}

.f-feature-showcase__icon {
    position: absolute;
    top: -20px;
    left: 22px;
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: rgb(var(--color-button));
    color: rgb(var(--color-button-text));
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.f-feature-showcase__icon .f-image,
.f-feature-showcase__icon img {
    width: 60%;
    height: 60%;
    object-fit: contain;
}

.f-feature-showcase__title {
    margin: 0 0 8px;
    color: rgb(var(--color-heading));
}

.f-feature-showcase__desc {
    margin: 0;
    line-height: 1.65;
    color: rgb(var(--color-foreground-secondary));
    word-break: normal;
    overflow-wrap: break-word;
}

.f-feature-showcase__middle {
    position: relative;
    min-height: 520px;
    border-radius: 16px;
    overflow: hidden;
}

.f-feature-showcase__middle .f-image,
.f-feature-showcase__middle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 平板：上排左模块+中间图，下排右模块并排 */
@media screen and (min-width: 768px) and (max-width: 1199px) {
    .f-feature-showcase__grid {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: clamp(20px, 3vw, 32px);
    }

    .f-feature-showcase__col--left {
        order: 1;
    }

    .f-feature-showcase__middle {
        order: 2;
        min-height: 0;
    }

    .f-feature-showcase__col--right {
        order: 3;
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: clamp(20px, 3vw, 32px);
    }

    .f-feature-showcase__col--right .f-feature-showcase__module {
        flex: none;
    }
}

/* 移动端：单列（标题 → 模块1/2 → 中间图 → 模块3/4） */
@media screen and (max-width: 767px) {
    .f-feature-showcase__grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 32px;
    }

    .f-feature-showcase__col {
        gap: 32px;
    }

    .f-feature-showcase__col--left {
        order: 1;
    }

    .f-feature-showcase__middle {
        order: 2;
        min-height: 0;
        aspect-ratio: 4 / 5;
    }

    .f-feature-showcase__col--right {
        order: 3;
    }

    .f-feature-showcase__module {
        flex: none;
    }
}