/* ========== AI教育页专属样式 ========== */

/* Insight Cards */
.insight-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; margin-bottom: 48px;
}
.insight-card {
    background: #fff; padding: 32px 28px; border-radius: 12px;
    box-shadow: var(--shadow); transition: var(--transition); border-left: 4px solid var(--navy);
}
.insight-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--red); }
.insight-icon {
    font-size: 2.5em; margin-bottom: 16px; width: 64px; height: 64px;
    display: flex; align-items: center; justify-content: center;
    background: var(--navy-light); border-radius: 50%;
}
.insight-card  h3 { color: var(--dark); margin-bottom: 12px; font-size: 1.15em; }
.insight-card p { color: var(--gray); font-size: 0.95em; line-height: 1.8; }
.insight-card strong { color: var(--red); }

/* Insight Article */
.insight-article {
    background: linear-gradient(135deg, rgba(27,58,92,0.04), rgba(200,16,46,0.04));
    border-radius: 12px; padding: 40px 48px; border: 1px solid rgba(27,58,92,0.1);
}
.insight-article h3 {
    font-size: 1.6em; color: var(--navy); margin-bottom: 20px;
    padding-bottom: 12px; border-bottom: 2px solid var(--red);
}
.insight-article p {
    color: var(--dark); font-size: 1.05em; line-height: 1.9; margin-bottom: 16px;
}

/* Evolution Timeline */
.evolution-timeline { display: flex; align-items: stretch; gap: 0; margin-bottom: 56px; }
.timeline-item {
    flex: 1; background: #fff; border-radius: 12px; box-shadow: var(--shadow); transition: var(--transition);
}
.timeline-image { width: 100%; height: 200px; object-fit: cover; display: block; border-bottom: 3px solid var(--red-light); }
.timeline-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.timeline-phase { text-align: center; margin-top: 16px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--navy-light); }
.phase-badge {
    display: inline-block; background: var(--navy); color: #fff;
    padding: 4px 16px; border-radius: 20px; font-size: 0.8em; font-weight: 700; margin-bottom: 12px;
}
.phase-2 { background: var(--red); }
.phase-3 { background: #10b981; }
.timeline-phase  h3 { color: var(--dark); font-size: 1.2em; }
.timeline-content { padding: 24px; }
.timeline-content p { color: var(--gray); font-size: 0.95em; line-height: 1.8; margin-bottom: 12px; }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px; }
.timeline-arrow { display: flex; align-items: center; justify-content: center; font-size: 2em; color: var(--red); flex-shrink: 0; padding: 0 8px; }

/* Evolution Summary */
.evolution-summary { text-align: center; background: #fff; border-radius: 12px; padding: 40px 36px; box-shadow: var(--shadow); }
.summary-icon {
    font-size: 3em; margin-bottom: 12px; display: inline-flex; align-items: center; justify-content: center;
    width: 72px; height: 72px; background: linear-gradient(135deg, var(--red-light), var(--navy-light)); border-radius: 50%;
}
.evolution-summary h3 { font-size: 1.5em; color: var(--dark); margin-bottom: 16px; }
.evolution-summary > p { color: var(--gray); font-size: 1.05em; line-height: 1.8; max-width: 700px; margin: 0 auto 32px; }
.summary-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.summary-card { background: var(--light-gray); padding: 24px 16px; border-radius: 10px; transition: var(--transition); }
.summary-card:hover { background: var(--navy-light); transform: translateY(-2px); }
.sc-icon { font-size: 2em; display: block; margin-bottom: 8px; }
.summary-card  h3 { color: var(--dark); font-size: 1.05em; margin-bottom: 6px; }
.summary-card p { color: var(--gray); font-size: 0.9em; line-height: 1.6; }

/* Curriculum */
.curriculum-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.curriculum-item { background: #fff; padding: 28px; border-radius: 12px; text-align: center; box-shadow: var(--shadow); transition: var(--transition); }
.curriculum-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.level-tag { display: inline-block; background: var(--red); color: #fff; padding: 3px 12px; border-radius: 20px; font-size: 0.8em; margin-bottom: 12px; }
.level-mid { background: var(--navy); }
.level-high { background: #f59e0b; }
.curriculum-item h5 { margin-bottom: 8px; font-size: 1.1em; color: var(--dark); }
.curriculum-item p { color: var(--gray); font-size: 0.95em; line-height: 1.7; margin-bottom: 12px; }

@media (max-width: 1024px) {
    .evolution-timeline { flex-direction: column; gap: 24px; }
    .timeline-arrow { transform: rotate(90deg); padding: 4px 0; }
    .summary-cards { grid-template-columns: repeat(2, 1fr); }
    .insight-grid { grid-template-columns: 1fr; max-width: 600px; margin: 0 auto 48px; }
}
@media (max-width: 768px) {
    .curriculum-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .era-year-line { border-top: none; border-left: 2px dashed var(--red-light); width: 2px; height: 32px; margin: 0 auto; }
}
@media (max-width: 480px) {
    .curriculum-grid, .summary-cards { grid-template-columns: 1fr; max-width: 320px; margin: 0 auto; }
    .insight-article { padding: 24px 20px; }
}
/* ========== 从内联提取的样式 ========== */
/* --- Curriculum Grid --- */
.curriculum-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;margin-top:36px}
.curriculum-card{background:#fff;border-radius:12px;padding:24px 20px;box-shadow:0 2px 12px rgba(0,0,0,.06);border-left:4px solid #C8102E;transition:transform .25s,box-shadow .25s}
.curriculum-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(200,16,46,.13)}
.curriculum-icon{font-size:2rem;display:block;margin-bottom:10px}
.curriculum-card  h3{margin:0 0 8px;font-size:1.05em;color:#222}
.curriculum-card p{margin:0;color:#666;font-size:.92em;line-height:1.55}

/* --- Timeline Stats --- */
.timeline-stat{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,#fff5f5,#ffeaea);border-radius:8px;padding:10px 18px;margin-top:14px;border:1px solid #ffd6d6}
.stat-num{font-size:1.3em;font-weight:700;color:#C8102E;white-space:nowrap}
.stat-label{font-size:.9em;color:#555}

/* --- Research Support Grid --- */
.support-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px;margin-top:36px}
.support-card{background:#fff;border-radius:14px;padding:32px 28px;box-shadow:0 4px 20px rgba(0,0,0,.07);transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden}
.support-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,#C8102E,#ff6b6b)}
.support-card:hover{transform:translateY(-5px);box-shadow:0 12px 32px rgba(200,16,46,.12)}
.support-icon{font-size:2.4rem;display:block;margin-bottom:14px}
.support-card  h3{margin:0 0 10px;font-size:1.15em;color:#222}
.support-card>p{color:#555;font-size:.95em;line-height:1.6;margin-bottom:14px}
.support-list{list-style:none;padding:0;margin:0}
.support-list li{padding:6px 0 6px 20px;position:relative;color:#555;font-size:.9em;border-bottom:1px dashed #eee}
.support-list li::before{content:"✔";position:absolute;left:0;color:#C8102E;font-weight:700}
.support-list li:last-child{border-bottom:none}

@media(max-width:768px){
  .curriculum-grid,.support-grid{grid-template-columns:1fr}
  .timeline-stat{font-size:.9em;padding:8px 14px}
  .stat-num{font-size:1.1em}
}