/* ============================ 教育经历 ============================ */

.page-hero {
    padding: calc(var(--nav-h) + 80px) 0 40px;
    text-align: center;
}
.page-hero .eyebrow { text-align: center; }
.page-hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    margin-bottom: 16px;
}
.page-hero .lead {
    color: var(--text-dim);
    font-size: 1.1rem;
    max-width: 640px;
    margin: 0 auto;
}

/* 时间轴 */
.timeline {
    position: relative;
    max-width: 860px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), rgba(247, 201, 72, 0.3), transparent);
}

.tl-item {
    position: relative;
    margin-bottom: 48px;
}

.tl-item:last-child {
    margin-bottom: 0;
}

.tl-marker {
    position: absolute;
    left: -40px;
    top: 4px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--accent);
    box-shadow: 0 0 16px rgba(255, 107, 53, 0.6);
}

.tl-marker::after {
    content: '';
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: var(--accent);
}

.tl-content {
    padding: 28px 32px;
}

.tl-date {
    font-family: var(--font-mono);
    color: var(--accent-2);
    font-size: 0.85rem;
    margin-bottom: 8px;
    display: inline-block;
}

.tl-content h2 {
    font-size: 1.45rem;
    margin-bottom: 6px;
}

.tl-loc {
    color: var(--text-dim);
    font-size: 0.92rem;
    margin-bottom: 14px;
}

.tl-content > p {
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 16px;
}

.course-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px 18px;
    margin-top: 14px;
}

.course-list li {
    color: var(--text-dim);
    font-size: 0.9rem;
    padding-left: 18px;
    position: relative;
}

.course-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.tl-content h3 {
    font-size: 1.05rem;
    color: var(--accent-2);
    margin: 16px 0 10px;
}

/* 成果卡 */
.ach-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.ach-card {
    text-align: center;
    padding: 32px 24px;
}

.ach-card .ico {
    font-size: 2rem;
    margin-bottom: 14px;
    display: inline-block;
}

.ach-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.ach-card p {
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.7;
}

@media screen and (max-width: 860px) {
    .ach-grid { grid-template-columns: 1fr; }
    .course-list { grid-template-columns: 1fr; }
    .tl-content { padding: 24px; }
}