/* AI 实战课程页：蓝青科技终端风格 */
body { background: linear-gradient(180deg, #f7fbff 0%, #ffffff 20%, #f0f7ff 100%); }

.hero-course { padding: 56px 0 64px; position: relative; }
.hero-course-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero-tag { display: inline-block; padding: 6px 14px; background: var(--soft-blue); border: 1px solid #c8dcff; border-radius: 999px; color: var(--blue-700); font-size: 12px; font-weight: 800; letter-spacing: 1px; margin-bottom: 20px; }
.hero-course h1 { font-size: 46px; line-height: 1.15; margin: 0 0 20px; color: var(--ink); }
.hero-course h1 .accent { background: linear-gradient(135deg, var(--blue), var(--cyan)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-lead { font-size: 17px; line-height: 1.8; color: #3f5068; max-width: 520px; margin: 0 0 28px; }
.hero-lead strong { color: var(--blue-950); }
.hero-actions { display: flex; gap: 12px; margin-bottom: 32px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero-stats .stat { display: flex; flex-direction: column; }
.hero-stats .num { font-size: 26px; font-weight: 800; color: var(--blue); line-height: 1; }
.hero-stats .lbl { font-size: 12px; color: var(--muted); margin-top: 6px; }

/* 终端卡片 */
.terminal-card {
  background: #0d1117; border: 1px solid #1f2937; border-radius: 12px;
  box-shadow: 0 28px 70px rgba(13, 17, 23, 0.3); overflow: hidden;
  font-family: "SF Mono", "Fira Code", Consolas, monospace;
}
.terminal-head { background: #161b22; padding: 12px 16px; display: flex; align-items: center; gap: 8px; border-bottom: 1px solid #1f2937; }
.terminal-head .dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ff5f56; } .dot.amber { background: #ffbd2e; } .dot.green { background: #27c93f; }
.terminal-title { margin-left: 12px; font-size: 12px; color: #64748b; }
.terminal-body { padding: 20px; font-size: 13px; line-height: 2; min-height: 240px; }
.term-line { color: #94a3b8; }
.term-line .prompt { color: var(--cyan); font-weight: 700; margin-right: 8px; }
.term-line.out { color: #64748b; padding-left: 20px; }
.term-line.out.success { color: #27c93f; }
.term-cursor { display: inline-block; width: 8px; height: 16px; background: var(--cyan); animation: blink 1s step-end infinite; vertical-align: middle; }
@keyframes blink { 50% { opacity: 0; } }

/* 模块卡片 */
.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.module-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 28px 24px;
  box-shadow: var(--shadow-card); transition: transform 0.25s, box-shadow 0.25s; position: relative; overflow: hidden;
}
.module-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--blue), var(--cyan)); transform: scaleX(0); transform-origin: left; transition: transform 0.3s; }
.module-card:hover { transform: translateY(-6px); box-shadow: 0 20px 48px rgba(30,64,175,0.12); }
.module-card:hover::before { transform: scaleX(1); }
.module-card.featured { border-color: var(--blue); box-shadow: 0 12px 36px rgba(37,99,235,0.12); }
.module-card.featured::before { transform: scaleX(1); }
.module-num { font-size: 13px; font-weight: 800; color: var(--blue); opacity: 0.5; margin-bottom: 8px; }
.module-icon { font-size: 32px; margin-bottom: 14px; }
.module-card h3 { font-size: 18px; margin: 0 0 10px; }
.module-card p { color: #55677f; font-size: 14px; line-height: 1.65; margin: 0 0 14px; }
.module-output { font-size: 12px; font-weight: 700; color: var(--blue-700); background: var(--soft-blue); padding: 6px 12px; border-radius: 6px; display: inline-block; }

/* CTA */
.band-soft { background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%); border-top: 1px solid #e3efff; }
.cta-simple { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; max-width: 900px; margin: 0 auto; }
.cta-text .kicker { color: var(--blue); font-weight: 800; font-size: 13px; margin-bottom: 8px; }
.cta-text h2 { font-size: 28px; margin: 0 0 12px; }
.cta-text p { color: var(--muted); font-size: 15px; margin: 0; }
.cta-form-simple { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 20px; display: flex; flex-direction: column; gap: 10px; box-shadow: var(--shadow-card); }
.cta-form-simple .field { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; font-size: 14px; font-family: inherit; }
.cta-form-simple .btn { width: 100%; }

@media (max-width: 900px) {
  .hero-course-grid, .cta-simple { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: 1fr; }
}