/* 写字积木 WritingPad（2026-09-06）：田字格 + 逐笔 + 释义；弹窗与板书内嵌共用 */
.wp-row { display: flex; flex-wrap: nowrap; gap: 18px; justify-content: center; align-items: flex-start; }
.wp-cell { display: flex; flex-direction: column; align-items: center; gap: 6px; flex: 1 1 0; min-width: 0; max-width: 40vh; }
.wp-row:has(.wp-cell:only-child) .wp-cell { flex-basis: min(100%, 40vh); }
.wp-svg { width: 100%; aspect-ratio: 1; border: 1.5px solid #d8cfae; border-radius: 10px; background: #fffdf6; box-shadow: inset 0 1px 0 #fff, 0 8px 18px -12px rgba(60,40,10,.35); }
.wp-tag { font: 600 13px/1.4 "IBM Plex Mono", ui-monospace, monospace; color: #b8860b; letter-spacing: .04em; white-space: nowrap; }
.wp-info { margin: 14px auto 0; max-width: 640px; border-top: 1px solid #e7dcc0; padding-top: 12px; }
.wp-line { font-size: 15px; line-height: 1.8; color: #3c4351; }
.wp-line b { font-size: 17px; color: #1a1a1a; letter-spacing: .08em; }
.wp-k { display: inline-block; min-width: 1.6em; margin-right: 8px; font-family: "Kaiti SC", "STKaiti", "KaiTi", serif; font-size: 18px; color: #1a1a1a; }
.wp-s { color: #7b6a45; font-size: 13px; }
.wp-credit { margin-top: 6px; font-size: 11px; color: #a8adb6; letter-spacing: .02em; }
.wp-credit a { color: #a8adb6; text-decoration: underline; }

/* 弹窗（不进辅导台、不开语音房） */
.wp-modal { position: fixed; inset: 0; z-index: 60; background: rgba(20, 28, 40, .38); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; padding: 18px; }
.wp-modal[hidden] { display: none; }
.wp-panel { width: min(880px, 100%); max-height: 92vh; overflow: auto; border-radius: 22px; padding: 20px 24px 22px; background: linear-gradient(135deg, rgba(255,255,255,.96), rgba(255,253,246,.94)); border: 1px solid #fff; box-shadow: 0 30px 60px -30px rgba(0,0,0,.45); }
.wp-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.wp-head h2 { font-family: "Songti SC", "STSong", serif; font-weight: 400; font-size: 24px; margin: 0; flex: 1; color: #1b2436; }
.wp-pg { font-size: 12.5px; color: #6b7280; }
.wp-sub { color: #4a5566; margin: 0 0 10px; }
.wp-host { padding: 6px 0; }
.wp-btns { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; align-items: center; }
.wp-btn { font: inherit; font-size: 15px; font-weight: 600; padding: 10px 18px; border-radius: 14px; border: 0; cursor: pointer; color: #fff; letter-spacing: .02em; text-shadow: 0 1px 1px rgba(0,0,0,.3);
  background: radial-gradient(120% 80% at 50% -20%, rgba(255,255,255,.55), rgba(255,255,255,0) 60%), linear-gradient(180deg, #d9a54a, #b8860b 55%, #9c6f06);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8), inset 0 -3px 6px rgba(80,50,0,.35), 0 10px 20px -10px rgba(120,80,0,.8), 0 2px 0 #7a5605; transition: transform .15s, filter .15s; }
.wp-btn:hover { transform: translateY(-1.5px); filter: brightness(1.05); }
.wp-btn:active { transform: translateY(1px); }
.wp-btn:disabled { opacity: .5; cursor: not-allowed; }
.wp-btn.ghost { color: #1b2436; text-shadow: 0 1px 0 #fff; background: radial-gradient(120% 80% at 50% -20%, rgba(255,255,255,.9), rgba(255,255,255,0) 60%), linear-gradient(180deg, #fff, #f5efdc 55%, #eadfc2);
  box-shadow: inset 0 1px 0 #fff, inset 0 -2px 5px rgba(150,120,60,.35), inset 0 0 0 1px rgba(200,180,130,.6), 0 8px 16px -10px rgba(100,80,30,.5), 0 2px 0 #d8cfae; }
.wp-btn.sm { font-size: 13px; padding: 7px 13px; border-radius: 11px; }
@media (max-width: 640px) {
  .wp-panel { padding: 14px; border-radius: 16px; }
  .wp-row { gap: 10px; flex-wrap: wrap; }
  .wp-cell { flex-basis: calc(50% - 6px); max-width: none; }
  .wp-head h2 { font-size: 20px; }
}
@media (prefers-reduced-motion: reduce) { .wp-btn { transition: none; } }