.interactive-quick-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
  padding: 12px 18px;
  border: 1px solid #c85d30;
  border-radius: 999px;
  background: #b65a2d;
  box-shadow: 0 8px 20px rgba(154, 72, 34, .18);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .18s ease, background .18s ease;
}
.interactive-quick-link:hover { background: #91451f; transform: translateY(-2px); }
.interactive-hub {
  margin-bottom: 26px;
  padding: 36px;
  border: 1px solid rgba(218, 225, 232, .92);
  border-radius: 22px;
  background: rgba(248, 250, 251, .86);
  backdrop-filter: blur(10px);
}
.interactive-hub-heading { display: flex; align-items: end; justify-content: space-between; gap: 18px; }
.interactive-hub-heading p { margin: 0 0 12px; color: var(--accent, #e8753d); font: 700 12px/1.2 Arial,sans-serif; letter-spacing: .16em; }
.interactive-hub-heading h2 { margin: 0; color: var(--ink, #17263a); font-size: 28px; }
.interactive-hub-heading span { color: var(--muted, #6b7787); font-size: 13px; white-space: nowrap; }
.interactive-hub-intro { margin: 12px 0 20px; color: var(--muted, #6b7787); font-size: 14px; line-height: 1.7; }
.interactive-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.interactive-filter {
  min-height: 42px;
  padding: 9px 15px;
  border: 1px solid #dce3e9;
  border-radius: 999px;
  background: rgba(255,255,255,.72);
  color: #42546a;
  cursor: pointer;
  font: 600 13px/1.2 "Noto Sans SC","Microsoft YaHei",sans-serif;
}
.interactive-filter[aria-pressed="true"] { border-color: #b65a2d; background: #b65a2d; color: #fff; }
.interactive-filter:hover:not([aria-pressed="true"]) { border-color: #e5a17f; background: #fff8f4; }
.interactive-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
.interactive-course {
  min-width: 0;
  padding: 17px;
  border: 1px solid #dce3e9;
  border-radius: 16px;
  background: rgba(255,255,255,.8);
  box-shadow: 0 7px 22px rgba(28,52,78,.04);
}
.interactive-course-heading { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.interactive-course-number { color: #b65a2d; font-size: 12px; font-weight: 700; white-space: nowrap; }
.interactive-course-heading h3 { flex: 1 1 160px; min-width: 0; margin: 0; color: var(--ink, #17263a); font-size: 16px; line-height: 1.4; }
.interactive-course-count { color: var(--muted, #6b7787); font-size: 11px; white-space: nowrap; }
.interactive-items { display: grid; gap: 7px; }
.interactive-item {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 48px;
  padding: 9px 11px;
  border: 1px solid #e5a17f;
  border-radius: 10px;
  background: #fff8f4;
  color: #9c4d28;
  text-decoration: none;
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
}
.interactive-item:hover { background: #fff; box-shadow: 0 5px 14px rgba(184,90,45,.13); transform: translateY(-1px); }
.interactive-kind { flex: 0 0 auto; padding: 4px 6px; border-radius: 6px; background: #fce8dd; font-size: 10px; font-weight: 700; white-space: nowrap; }
.interactive-item-title { flex: 1 1 auto; min-width: 0; font-size: 13px; font-weight: 600; line-height: 1.4; }
.interactive-item-arrow { flex: 0 0 auto; font-size: 11px; white-space: nowrap; }
.interactive-status { min-height: 1.3em; margin: 14px 0 0; color: var(--muted, #6b7787); font-size: 12px; }
.interactive-hub :is(a,button):focus-visible { outline: 3px solid #3478b5; outline-offset: 2px; }

body.interactive-player {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  margin: 0;
  overflow: hidden;
  background: #101b2c;
  color: #f3f6fa;
  font-family: "Noto Sans SC","Microsoft YaHei",sans-serif;
}
.interactive-player * { box-sizing: border-box; }
.interactive-player-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 78px;
  padding: 12px 24px;
  border-bottom: 1px solid #2b3b51;
  background: #17263a;
}
.interactive-back { flex: 0 0 auto; color: #ffb18a; font-size: 13px; font-weight: 700; text-decoration: none; }
.interactive-player-title { flex: 1 1 auto; min-width: 0; }
.interactive-player-title p { margin: 0 0 4px; color: #a9b9cb; font-size: 11px; }
.interactive-player-title h1 { margin: 0; overflow: hidden; color: #fff; font-size: 18px; text-overflow: ellipsis; white-space: nowrap; }
.interactive-player-actions { display: flex; flex: 0 0 auto; gap: 8px; }
.interactive-player-actions :is(button,a) {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid #465a72;
  border-radius: 8px;
  background: #253850;
  color: #f3f6fa;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}
.interactive-player-actions button:disabled { opacity: .45; cursor: default; }
.interactive-player-actions :is(button,a):hover:not(:disabled) { background: #36516e; }
.interactive-player :is(a,button):focus-visible { outline: 3px solid #8cc8ff; outline-offset: 2px; }
.interactive-player-stage { position: relative; flex: 1 1 auto; min-height: 0; }
.interactive-player-stage iframe { position: absolute; inset: 0; display: block; width: 100%; height: 100%; border: 0; background: #fff; }
.interactive-player-stage #game-status {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 24px;
  background: #101b2c;
  color: #d4deea;
  text-align: center;
  font-size: 15px;
}
.interactive-player-stage #game-status[hidden] { display: none; }
@media (max-width: 820px) {
  .interactive-grid { grid-template-columns: 1fr; }
  .interactive-hub { padding: 25px 20px; }
}
@media (max-width: 640px) {
  .interactive-hub-heading { align-items: start; flex-direction: column; gap: 6px; }
  .interactive-player-bar { align-items: start; flex-wrap: wrap; gap: 8px 12px; padding: 10px 14px; }
  .interactive-back { order: 0; }
  .interactive-player-title { order: 2; flex-basis: 100%; }
  .interactive-player-title h1 { font-size: 16px; }
  .interactive-player-actions { order: 1; margin-left: auto; }
  .interactive-player-actions :is(button,a) { padding: 7px 9px; font-size: 11px; }
  .interactive-player-actions #game-classroom { display: none; }
  .interactive-player-stage { min-height: 0; }
}