.about-main-wrap {
    margin: 0 auto;
    padding: 0 0 36px 0;
    max-width: 1366px;
    padding-top: 65px;
}

.about-title-bar {
    background: linear-gradient(90deg, #b700ff 0%, #a6a1ff 100%);
    color: #fff;
    padding: 32px 24px 18px 24px;
    border-radius: 16px;
    margin-bottom: 32px;
    font-size: 1.6rem;
    font-weight: bold;
    letter-spacing: 1px;
}

.about-title-bar small {
    display: block;
    font-size: 1.1rem;
    margin-top: 6px;
    opacity: 0.9;
    font-weight: normal;
}

/* 通用 */
.about-h2 {
    font-size: 2.2rem;
    font-weight: 900;
    color: #111;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
}

.about-h2.center {
    justify-content: center;
}

.about-h2.center::before {
    display: none;
}

.about-paragraph {
    color: #666;
    font-size: 1rem;
    line-height: 1.7;
}

.about-paragraph.center {
    text-align: center;
}

.ph {
    background: #d9d9d9;
    border-radius: 16px;
}

/* HERO */
.about-hero {
    background: #fff;
    padding: 60px 30px;
    border-radius: 18px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    margin: 26px 0;
}

.about-hero-media {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 30px;
    margin-bottom: 80px;
}

.ph-vertical {
    width: 280px;
    height: 400px;
    background: #e0e0e0;
    border-radius: 12px;
}

/* 中间图片轻微下移 */
.ph-offset {
    margin-top: 60px;
}

.about-hero-copy {
    text-align: center;
}

.about-hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: #000;
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.about-hero-desc {
    color: #666;
    font-size: 0.9rem;
    line-height: 2;
    max-width: 800px;
    margin: 0 auto 60px auto;
    letter-spacing: 1px;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 120px;
}

.about-stats .stat {
    text-align: center;
}

.about-stats .num {
    color: #b700ff;
    font-weight: 900;
    font-size: 3rem;
    margin-bottom: 12px;
}

.about-stats .label {
    color: #666;
    font-size: 1rem;
}

/* split */
.about-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: flex-start;
    margin: 26px 0;
    background: #fff;
    padding: 60px 30px;
    border-radius: 18px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.about-split-left {
    background: transparent;
    box-shadow: none;
    padding: 0;
}

.about-h2 {
    font-size: 2.5rem;
    font-weight: 900;
    color: #111;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
}

.about-h2::before {
    display: none;
}

.about-paragraph {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-mini-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.mini-col .mini-title {
    font-weight: 900;
    color: #b700ff;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.mini-col .mini-text {
    color: #666;
    font-size: 1rem;
    line-height: 1.8;
}

/* collage */
.about-split-right {
    background: transparent;
    box-shadow: none;
    padding: 0;
}

.about-collage {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.collage-top {
    display: flex;
    gap: 20px;
}

.collage-top .ph-square {
    flex: 1;
    height: 240px;
    border-radius: 16px;
}

.collage-bottom .ph-rect {
    width: 100%;
    height: 300px;
    border-radius: 16px;
}

.ph-wide {
    height: 220px;
    margin-top: 18px;
    border-radius: 16px;
}

.about-icon-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px 30px;
}

.icon-item {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
}

.icon-dot {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    background: #b700ff;
    flex-shrink: 0;
}

/* ranking */
.about-ranking {
    background: #fff;
    padding: 60px 30px;
    border-radius: 18px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    margin: 26px 0;
    text-align: center;
}

.ph-rank {
    height: 480px;
    background: #e0e0e0;
    border-radius: 12px;
    margin: 40px auto 20px auto;
    max-width: 1000px;
}

.dots {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 30px;
}

/* teachers */
.about-teachers {
    background: #fff;
    padding: 60px 30px;
    border-radius: 18px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    margin: 26px 0;
}

.about-teachers-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 40px;
}

.about-pill-btn {
    padding: 10px 24px;
    background: #b700ff;
    color: #fff;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 800;
    font-size: 0.95rem;
}

.teacher-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.teacher-card {
    background: #fff;
    border-radius: 20px;
    padding: 0;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
    border: 1px solid #f0f0f0;
}

.teacher-card:hover {
    transform: translateY(-5px);
}

.ph-teacher {
    width: 100%;
    height: 200px;
    background: #d9d9d9;
    border-radius: 0;
}

.teacher-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 20px 15px 20px;
}

.teacher-name {
    font-size: 1.5rem;
    font-weight: 900;
    color: #000;
}

.teacher-tag {
    padding: 6px 16px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 800;
    color: #fff;
}

.tag-cyan {
    background-color: #8be1ff;
}

.tag-red {
    background-color: #ff9393;
}

.tag-purple {
    background-color: #e28eff;
}

.tag-blue-violet {
    background-color: #8ea2ff;
}

.teacher-line {
    height: 1px;
    background-color: #000;
    margin: 0 20px;
}

.teacher-achievement {
    padding: 15px 20px 25px 20px;
    font-size: 1.05rem;
    font-weight: 900;
    color: #000;
    text-align: left;
}

/* CTA */
.about-cta {
    margin-top: 28px;
    background: linear-gradient(90deg, #b700ff 0%, #a6a1ff 100%);
    border-radius: 18px;
    padding: 34px 22px;
    color: #fff;
}

.cta-inner {
    max-width: 980px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: 1.55rem;
    font-weight: 900;
    margin-bottom: 10px;
}

.cta-desc {
    opacity: 0.9;
    line-height: 1.7;
    margin-bottom: 18px;
    font-size: 0.98rem;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
    text-decoration: none;
    font-weight: 900;
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.cta-btn:hover {
    background: rgba(255, 255, 255, 0.28);
}

@media (max-width: 900px) {
    .about-hero {
        padding: 18px;
    }
    .about-hero-media {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 10px;
    }
    .ph-card { height: 150px; }
    .ph-center { height: 170px; }

    .about-stats {
        gap: 22px;
        flex-wrap: wrap;
    }

    .about-split,
    .about-split.alt {
        grid-template-columns: 1fr;
    }

    .about-split-left,
    .about-split-right {
        padding: 18px;
    }

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

    .about-collage {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 140px 140px;
    }
    .ph-square { height: 140px; }
    .ph-rect { height: 170px; }
    .ph-wide { height: 180px; }
    .ph-rank { height: 200px; }

    .teacher-grid {
        grid-template-columns: 1fr 1fr;
    }
}