/* ═══════════════════════════════════════════════
   亚谷诺成 · academy.html 页面专属样式
   ═══════════════════════════════════════════════ */

/* ───────── Academy Hero ───────── */
.academy-hero {
  min-height: 70svh; display: flex; align-items: center; justify-content: center;
  position: relative; text-align: center; overflow: hidden;
  background: linear-gradient(160deg, #f5f0eb 0%, #e8dfd5 20%, #d4c5b5 50%, #f0eaf8 100%);
}
.academy-hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(74,45,122,.12) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 60%, rgba(201,168,76,.12) 0%, transparent 50%);
  animation: heroAtmo 12s ease-in-out infinite alternate; pointer-events: none;
}
.academy-hero-orb-1, .academy-hero-orb-2 {
  position: absolute; border-radius: 50%; pointer-events: none; filter: blur(70px);
}
.academy-hero-orb-1 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(201,168,76,.18), transparent 65%);
  top: -100px; right: -80px; animation: float 12s ease-in-out infinite;
}
.academy-hero-orb-2 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(74,45,122,.12), transparent 65%);
  bottom: -100px; left: -60px; animation: float 14s ease-in-out infinite reverse;
}
.academy-hero-inner { position: relative; z-index: 2; padding: 140px 20px 80px; max-width: 900px; margin: 0 auto; }

/* ───────── 三级课程卡片 ───────── */
.course-tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; align-items: stretch; }
.course-tier-card {
  padding: 50px 40px; background: var(--bg-card);
  border: 1px solid var(--border-light); border-radius: var(--radius);
  box-shadow: var(--shadow); position: relative;
  transition: all var(--transition-smooth);
  display: flex; flex-direction: column;
}
.course-tier-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-xl); }
.course-tier-basic { border-top: 4px solid var(--gold); }
.course-tier-advanced { border-top: 4px solid var(--purple-mid); transform: scale(1.03); }
.course-tier-advanced:hover { transform: scale(1.03) translateY(-10px); }
.course-tier-expert { border-top: 4px solid var(--purple-dark); }
.tier-badge {
  position: absolute; top: 16px; right: 16px;
  font-size: 10px; font-weight: 700; color: #2a1a4a;
  background: var(--gold-soft); padding: 4px 12px; border-radius: 999px; letter-spacing: 1px;
}
.tier-badge-rec { background: linear-gradient(135deg, var(--gold-light), var(--gold)); color: #2a1a4a; }
.tier-icon { margin-bottom: 16px; color: var(--gold); }
.course-tier-card h3 { font-size: 22px; color: var(--purple-deep); letter-spacing: 2px; margin-bottom: 8px; }
.tier-meta { display: flex; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.tier-meta span { font-size: 12px; color: var(--text-muted); background: var(--bg-butter); padding: 3px 10px; border-radius: 999px; }
.course-tier-card > p { font-size: 14px; color: var(--text-secondary); margin-bottom: 18px; line-height: 1.7; }
.tier-outline { list-style: none; margin-bottom: 20px; flex-grow: 1; }
.tier-outline li { font-size: 13.5px; color: var(--text-secondary); padding: 6px 0 6px 22px; position: relative; }
.tier-outline li::before { content: "◆"; position: absolute; left: 0; color: var(--gold); font-size: 9px; top: 12px; }
.tier-price { margin-bottom: 18px; text-align: center; }
.tier-price b { font-size: 30px; color: var(--purple-mid); font-weight: 800; }
.tier-price span { font-size: 14px; color: var(--text-muted); }

/* ───────── 课程对比表 ───────── */
.compare-table-wrap { overflow-x: auto; }
.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th, .compare-table td {
  padding: 14px 20px; border: 1px solid var(--border-light); text-align: center;
}
.compare-table th {
  background: var(--purple-deep); color: var(--gold-light); font-weight: 600; letter-spacing: 1px;
}
.compare-table td { color: var(--text-secondary); background: var(--bg-card); }
.compare-table .rec-col { background: var(--gold-soft) !important; color: var(--purple-deep); font-weight: 600; }
.compare-table tbody tr:hover td { background: var(--bg-butter); }
.compare-table tbody tr:hover .rec-col { background: #fdf0d0 !important; }

/* ───────── 学习场景 ───────── */
.scene-section { background: var(--bg-warm); }
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scene-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border-light); box-shadow: var(--shadow);
  transition: all var(--transition);
}
.scene-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
.scene-card img { width: 100%; display: block; }
.scene-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 20px; background: linear-gradient(transparent, rgba(42,26,74,.85));
  color: #fff;
}
.scene-overlay h4 { font-size: 16px; margin-bottom: 4px; letter-spacing: 1px; }
.scene-overlay p { font-size: 12px; opacity: .8; }

/* ───────── 学习流程 ───────── */
.process-section { background: var(--bg-butter); }
.learning-path { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; position: relative; align-items: start; }
.learning-step { text-align: center; position: relative; padding: 24px 12px; }
.learning-step-icon { width: 100px; margin: 0 auto 14px; }
.learning-step-icon img { width: 100%; }
.learning-step h4 { font-size: 16px; color: var(--purple-deep); margin-bottom: 6px; letter-spacing: 1px; }
.learning-step p { font-size: 12.5px; color: var(--text-secondary); line-height: 1.6; }
.learning-arrow { position: absolute; right: -12px; top: 50%; transform: translateY(-50%); color: var(--gold); }

/* ───────── 讲师增强 ───────── */
.course-instructors { background: linear-gradient(180deg, var(--bg-butter), var(--bg-warm)); }
.instructor-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px; align-items: stretch; }
.instructor-card {
  padding: 40px 28px; background: var(--bg-card);
  border: 1px solid var(--border-light); border-radius: var(--radius);
  text-align: center; box-shadow: var(--shadow);
  transition: all var(--transition);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
}
.instructor-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--purple-mid));
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition-smooth);
}
.instructor-card:hover::before { transform: scaleX(1); }
.instructor-card:hover { border-color: var(--border-glow); transform: translateY(-10px); box-shadow: var(--shadow-xl); }
.instructor-avatar {
  width: 90px; height: 90px; margin: 0 auto 16px; border-radius: 50%;
  overflow: hidden; border: 3px solid var(--gold);
  box-shadow: 0 8px 25px rgba(0,0,0,.08);
  transition: transform var(--transition-smooth);
}
.instructor-card:hover .instructor-avatar { transform: scale(1.08); }
.instructor-avatar img { width: 100%; height: 100%; object-fit: cover; }
.instructor-card h4 { font-size: 18px; color: var(--purple-deep); letter-spacing: 2px; }
.instructor-title { font-size: 12px; color: var(--gold-deep); font-weight: 600; margin: 6px 0 2px; }
.instructor-org { font-size: 11px; color: var(--text-muted); margin-bottom: 12px; }
.instructor-desc { font-size: 12.5px; color: var(--text-secondary); line-height: 2; text-align: left; margin-bottom: 12px; flex-grow: 1; }
.instructor-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }
.instructor-tags span { font-size: 10px; padding: 3px 10px; background: var(--gold-soft); color: var(--gold-deep); border-radius: 999px; font-weight: 500; }

/* ───────── FAQ ───────── */
.faq-section { background: var(--bg-warm); }
.faq-list { max-width: 800px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-sm); overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--border-glow); }
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; cursor: pointer; font-size: 15px; font-weight: 600;
  color: var(--purple-deep); letter-spacing: .5px;
  user-select: none; transition: color var(--transition);
}
.faq-question svg { color: var(--gold); transition: transform var(--transition); flex-shrink: 0; }
.faq-item.open .faq-question { color: var(--purple-mid); }
.faq-item.open .faq-question svg { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s cubic-bezier(.22,.8,.3,1); }
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p { padding: 0 24px 18px; font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* ───────── 报名表单 ───────── */
.apply-form-wrap {
  max-width: 700px; margin: 0 auto; padding: 40px 36px;
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
}
.apply-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.apply-form { display: grid; gap: 18px; }

/* ───────── 响应式 ───────── */
@media (max-width: 1024px) {
  .course-tier-grid { grid-template-columns: 1fr; }
  .course-tier-advanced { transform: none; }
  .course-tier-advanced:hover { transform: translateY(-10px); }
  .instructor-grid { grid-template-columns: repeat(3,1fr); }
  .scene-grid { grid-template-columns: 1fr; }
  .learning-path { grid-template-columns: repeat(3,1fr); }
  .learning-arrow { display: none; }
}
@media (max-width: 768px) {
  .instructor-grid { grid-template-columns: repeat(2,1fr); }
  .learning-path { grid-template-columns: repeat(2,1fr); }
  .apply-form-grid { grid-template-columns: 1fr; }
  .academy-hero { min-height: 60svh; }
  .academy-hero-inner { padding: 120px 20px 60px; }
}