/* 现场演示体验页：沿用后台的设计（console.css），页面更宽松、按钮更大，适合投屏 */
.demo-body { background: radial-gradient(circle at 12% 0%, #EFF4FF 0, transparent 40%), radial-gradient(circle at 95% 100%, #FFF4EC 0, transparent 35%), #FFFFFF; min-height: 100vh; }
.demo-top { display: flex; align-items: center; justify-content: space-between; gap: var(--s4); padding: var(--s4) 40px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.85); position: sticky; top: 0; z-index: 20; backdrop-filter: blur(6px); }
.demo-top .brand { padding: 0; }
.demo-top-actions { display: flex; gap: var(--s2); }
.demo-main { max-width: 1180px; margin: 0 auto; padding: var(--s6) 40px var(--s7); }
.demo-hero { margin-bottom: var(--s6); }
.demo-hero h1 { margin: 0; font-size: 32px; font-weight: 700; letter-spacing: -0.2px; }
.demo-hero p { margin: var(--s2) 0 0; color: var(--muted); font-size: 16px; max-width: 720px; }
.demo-books { margin-bottom: var(--s4); flex-wrap: wrap; }
.demo-units { display: flex; flex-wrap: wrap; gap: var(--s3); margin-bottom: var(--s6); }
.unit-pill { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: var(--s3) var(--s4); border: 1px solid var(--line-strong);
  border-radius: var(--radius); background: #fff; cursor: pointer; font: inherit; color: inherit; box-shadow: var(--shadow); min-width: 180px; text-align: left; }
.unit-pill b { font-weight: 600; font-size: 15px; }
.unit-pill small { color: var(--faint); font-size: 13px; }
.unit-pill.is-on { border-color: var(--blue); box-shadow: var(--shadow), var(--ring); }
.demo-main .class-card.is-off { opacity: 0.55; cursor: default; }
.demo-main .class-card.is-off:hover { box-shadow: var(--shadow); border-color: var(--line); }
.demo-play { width: 22px; height: 22px; color: var(--cta); }
.demo-lead-intro { margin: 0 0 var(--s4); color: var(--muted); }
.demo-privacy { margin: 0; }
@media (max-width: 720px) {
  .demo-top, .demo-main { padding-left: var(--s4); padding-right: var(--s4); }
  .demo-hero h1 { font-size: 26px; }
  .demo-top .brand-sub { display: none; }
  .demo-books { display: flex; flex-direction: column; width: 100%; }
  .demo-books .seg-btn { border-right: 0; border-bottom: 1px solid var(--line-strong); text-align: left; }
  .demo-books .seg-btn:last-child { border-bottom: 0; }
  .unit-pill { flex: 1 1 100%; }
}
.unit-pill.is-locked { background: var(--bg); border-style: dashed; box-shadow: none; }
.unit-pill.is-locked b { color: var(--muted); }
.unit-lock { width: 14px; height: 14px; margin-right: 4px; vertical-align: -2px; color: var(--muted); }
.demo-unlock-note { margin: calc(-1 * var(--s4)) 0 var(--s6); color: var(--muted); display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.demo-foot { text-align: center; padding: 0 var(--s4) var(--s6); font-size: 13px; color: var(--faint); }
.demo-foot a, .demo-privacy a { color: var(--muted); }
/* 立即开通 */
.demo-top-actions .btn-cta { font-weight: 700; }
.demo-order { margin-top: var(--s7); padding: var(--s6); border-radius: var(--radius); background: linear-gradient(135deg, #FFF4EC, #EFF4FF);
  border: 1px solid var(--line); }
.demo-order-head h2 { margin: 0; font-size: 24px; }
.demo-order-head p { margin: var(--s2) 0 var(--s5); color: var(--muted); max-width: 640px; }
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s4); }
.plan-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s5); box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: var(--s2); }
.plan-name { font-size: 18px; font-weight: 700; }
.plan-card p { margin: 0 0 var(--s2); color: var(--muted); flex: 1; }
.plan-card .btn { align-self: flex-start; }
.od-plans { display: flex; gap: var(--s4); flex-wrap: wrap; }
.od-plan { display: flex; align-items: center; gap: 6px; font-weight: 500; }
.demo-order-link { margin-right: auto; }
.od-done { text-align: center; }
.od-done p { margin: 0; color: var(--muted); }
.od-id { font-size: 30px; font-weight: 800; letter-spacing: 1px; margin: var(--s2) 0 var(--s1); color: var(--ink); }
.od-next { margin: var(--s5) 0 var(--s3) !important; }
.od-ways { display: flex; flex-direction: column; gap: var(--s2); align-items: stretch; max-width: 360px; margin: 0 auto; }
.od-ways .btn svg { width: 18px; height: 18px; vertical-align: -3px; }
@media (max-width: 720px) {
  .plan-grid { grid-template-columns: 1fr; }
  .demo-order { padding: var(--s4); }
  .demo-top-actions #demo-contact { display: none; }
}
@media (max-width: 720px) {
  .modal .field-row { display: flex; flex-direction: column; gap: 0; }
  .modal .field-row .field { width: 100%; }
}
.od-unlocked { color: #067647 !important; font-weight: 600; margin-bottom: var(--s3) !important; }
.od-unlocked svg { width: 16px; height: 16px; vertical-align: -3px; }