/* ============ 基础 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  height: 100%; background: #07090f; overflow: hidden;
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  -webkit-tap-highlight-color: transparent;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
svg { display: block; }

#stage-wrap { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center; }
#stage {
  position: absolute; left: 50%; top: 50%; transform-origin: center center;
  background: #000; overflow: hidden;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .65), 0 0 0 1px rgba(255, 255, 255, .06);
}

/* ============ 页面 ============ */
.page { position: absolute; inset: 0; overflow: hidden; will-change: transform; }
.page.slide-next { animation: pgInRight .46s cubic-bezier(.22, .61, .36, 1) both; }
.page.slide-prev { animation: pgInLeft .46s cubic-bezier(.22, .61, .36, 1) both; }
@keyframes pgInRight { from { transform: translate3d(100%, 0, 0); } to { transform: translate3d(0, 0, 0); } }
@keyframes pgInLeft { from { transform: translate3d(-100%, 0, 0); } to { transform: translate3d(0, 0, 0); } }

.el { position: absolute; }
.anim { position: absolute; left: 0; top: 0; width: 100%; height: 100%; }

.el-img { position: absolute; left: 0; top: 0; overflow: hidden; }
.el-img img { display: block; max-width: none; max-height: none; user-select: none; -webkit-user-drag: none; }

.el-txt { position: absolute; left: 0; top: 0; overflow: hidden; }
.el-txt > .tx { white-space: pre-wrap; word-break: break-word; }
.el-txt > .tx p { margin: 0; }

/* ============ 动画（与原作关键帧一致） ============ */
@keyframes FadeInNormal { 0% { opacity: 0; } 100% { opacity: 1; } }
@keyframes FadeOut { 0% { opacity: 1; } 100% { opacity: 0; } }
@keyframes FadeInRight { 0% { opacity: 0; transform: translate3d(100%, 0, 0); } 100% { opacity: 1; transform: translate3d(0, 0, 0); } }
@keyframes FadeInLeft { 0% { opacity: 0; transform: translate3d(-100%, 0, 0); } 100% { opacity: 1; transform: translate3d(0, 0, 0); } }
@keyframes FadeInUp { 0% { opacity: 0; transform: translate3d(0, 100%, 0); } 100% { opacity: 1; transform: translate3d(0, 0, 0); } }
@keyframes FadeInDown { 0% { opacity: 0; transform: translate3d(0, -100%, 0); } 100% { opacity: 1; transform: translate3d(0, 0, 0); } }
@keyframes Fade { 0% { opacity: 1; } 50% { opacity: 0; } 100% { opacity: 1; } }
@keyframes StretchLeft {
  0% { opacity: 0; transform: scaleX(.3); transform-origin: 100% 0%; }
  40% { opacity: 1; transform: scaleX(1.02); transform-origin: 100% 0%; }
  60% { transform: scaleX(.98); transform-origin: 100% 0%; }
  80% { transform: scaleX(1.01); transform-origin: 100% 0%; }
  100% { opacity: 1; transform: scaleX(1); transform-origin: 100% 0%; }
}
@keyframes StretchRight {
  0% { opacity: 0; transform: scaleX(.3); transform-origin: 0% 0%; }
  40% { opacity: 1; transform: scaleX(1.02); transform-origin: 0% 0%; }
  60% { transform: scaleX(.98); transform-origin: 0% 0%; }
  80% { transform: scaleX(1.01); transform-origin: 0% 0%; }
  100% { opacity: 1; transform: scaleX(1); transform-origin: 0% 0%; }
}
@keyframes PullUp {
  0% { opacity: 0; transform: scaleY(.1) translateZ(0); transform-origin: 50% 100%; }
  40% { opacity: 1; transform: scaleY(1.02); transform-origin: 50% 100%; }
  60% { transform: scaleY(.98); transform-origin: 50% 100%; }
  80% { transform: scaleY(1.01); transform-origin: 50% 100%; }
  100% { opacity: 1; transform: scaleY(1); transform-origin: 50% 100%; }
}
@keyframes SlideOutRight {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(200%, 0, 0); opacity: 0; }
}
@keyframes SlideOutLeft {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-200%, 0, 0); opacity: 0; }
}

/* ============ 开场 ============ */
#intro {
  position: fixed; inset: 0; z-index: 40; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(120% 90% at 50% 0%, #1b2a52 0%, #0a0e18 55%, #06080d 100%);
  transition: opacity .55s ease, visibility .55s;
}
#intro.hide { opacity: 0; visibility: hidden; pointer-events: none; }
.intro-inner { text-align: center; padding: 28px; max-width: 460px; }
.intro-cover {
  width: 176px; height: 176px; margin: 0 auto 26px; border-radius: 22px;
  background-size: cover; background-position: center;
  box-shadow: 0 18px 46px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .1);
  filter: saturate(1.05);
}
#intro h1 { font-size: 25px; font-weight: 600; letter-spacing: 2px; color: #f3efe4; }
#intro-sub { margin-top: 10px; font-size: 13px; letter-spacing: 3px; color: #a9b4cc; }
.start-btn {
  margin-top: 30px; display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 32px; border-radius: 999px; font-size: 15px; letter-spacing: 2px; color: #16233d;
  background: linear-gradient(135deg, #f6e6bd, #e8cf95);
  box-shadow: 0 12px 30px rgba(232, 207, 149, .28);
  transition: transform .18s ease, box-shadow .18s ease;
}
.start-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(232, 207, 149, .36); }
.start-btn:active { transform: translateY(0) scale(.98); }
.intro-tip { margin-top: 18px; font-size: 11.5px; letter-spacing: 1.5px; color: #6d7893; }

/* ============ 加载 ============ */
#loader {
  position: fixed; inset: 0; z-index: 60; background: #07090f;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px;
  transition: opacity .4s ease, visibility .4s;
}
#loader.hide { opacity: 0; visibility: hidden; }
.loader-bar { width: 168px; height: 3px; border-radius: 3px; background: rgba(255, 255, 255, .12); overflow: hidden; }
.loader-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, #e8cf95, #f6e6bd); transition: width .2s; }
#loader-txt { font-size: 12px; letter-spacing: 1.5px; color: #7d889f; }

/* ============ 控制条 ============ */
#ui { position: fixed; inset: 0; z-index: 30; pointer-events: none; opacity: 0; transition: opacity .35s ease; }
#ui.show { opacity: 1; }
#ui .progress {
  position: absolute; left: 0; right: 0; top: 0; height: 2px; background: rgba(255, 255, 255, .08);
}
#ui .progress i { display: block; height: 100%; width: 0; background: rgba(246, 230, 189, .85); transition: width .12s linear; }
#ui .bar {
  position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%);
  display: flex; align-items: center; gap: 4px; padding: 7px 10px; border-radius: 999px;
  background: rgba(14, 18, 28, .62); backdrop-filter: blur(14px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .4), 0 0 0 1px rgba(255, 255, 255, .09);
  pointer-events: auto;
}
#ui .bar button {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
  color: #dfe4ef; transition: background .15s, color .15s, opacity .15s;
}
#ui .bar button:hover { background: rgba(255, 255, 255, .12); color: #fff; }
#ui .bar button.off { color: #6b7488; }
#ui .pager {
  font-size: 12px; letter-spacing: 1px; color: #9aa4b8; padding: 0 8px; min-width: 58px; text-align: center;
  font-variant-numeric: tabular-nums;
}
#ui .pager b { color: #f0e6cc; font-weight: 600; }

#hint {
  position: fixed; left: 50%; bottom: 78px; transform: translateX(-50%);
  font-size: 12px; letter-spacing: 3px; color: rgba(255, 255, 255, .5);
  z-index: 25; pointer-events: none; opacity: 0; transition: opacity .5s;
}
#hint.show { opacity: 1; animation: hintPulse 2.4s ease-in-out infinite; }
@keyframes hintPulse { 0%, 100% { opacity: .28; } 50% { opacity: .68; } }

@media (max-width: 520px) {
  #ui .bar { bottom: 14px; gap: 0; }
  #ui .bar button { width: 32px; height: 32px; }
}