.about-body {
    max-width: 900px;
    margin: 0 auto;
    padding: 18px 20px 20px;
}

.intro-card {
    background: linear-gradient(135deg, var(--color-background-secondary) 0%, var(--color-background-tertiary) 100%);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-lg);
    padding: 30px 24px 24px;
    text-align: center;
}

.intro-logo {
    width: 58px;
    height: 58px;
    margin: 0 auto 12px;
    display: block;
}

.intro-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.intro-title .ver {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    color: #409178;
    margin-left: 8px;
}

.intro-tag {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.intro-desc {
    font-size: 13.5px;
    color: var(--color-text-tertiary);
    max-width: 560px;
    margin: 12px auto 0;
    line-height: 1.6;
}

.intro-desc .accent {
    color: var(--pomodoro-color);
    font-weight: 600;
}

.intro-badges {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 500;
    background: var(--color-background-primary);
    border: 1px solid var(--color-border-tertiary);
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.badge svg {
    width: 13px;
    height: 13px;
    color: #409178;
    flex-shrink: 0;
}

.section-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--color-text-tertiary);
    margin: 18px 0 10px;
}

.section-label::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--color-border-tertiary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.feature {
    background: var(--color-background-secondary);
    border-radius: var(--border-radius-md);
    padding: 12px 14px;
}

.feature .fhead {
    display: flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 4px;
}

.feature .fhead svg {
    width: 15px;
    height: 15px;
    color: #409178;
    flex-shrink: 0;
}

.feature h4 {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--color-text-primary);
}

.feature p {
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.45;
}

.steps-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

.step {
    background: var(--color-background-secondary);
    border-radius: var(--border-radius-md);
    padding: 11px 12px;
}

.step .num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--pomodoro-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 7px;
}

.step h4 {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--color-text-primary);
}

.step p {
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.45;
    margin-top: 2px;
}

.step.hl {
    background: rgba(64, 145, 120, 0.14);
    border: 1px solid rgba(64, 145, 120, 0.4);
}

.step.hl .num {
    background: #409178;
}

.about-footer {
    margin-top: 18px;
    padding-top: 13px;
    border-top: 1px solid var(--color-border-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.about-footer .mono {
    font-family: var(--font-mono);
    font-size: 11px;
}

.about-footer .sep {
    color: var(--color-border-secondary);
}

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }

    .steps-row {
        grid-template-columns: 1fr 1fr;
    }

    .steps-row .step.hl {
        grid-column: 1 / -1;
    }
}