/* 所有数值采用607.5×1080逻辑坐标，整体缩放沿用已验收的框架。 */
.story-cover { position: absolute; inset: 0; isolation: isolate; }
.cover-scene { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; pointer-events: none; user-select: none; }
.cover-art { position: relative; display: block; width: 100%; overflow: hidden; pointer-events: none; }
.cover-art img { position: absolute; display: block; max-width: none; user-select: none; }

.cover-title { position: absolute; z-index: 1; top: 88px; left: 50%; width: 356px; margin: 0; transform: translateX(-50%); }
.cover-narration { position: absolute; z-index: 1; top: 212px; left: 50%; width: 382px; transform: translateX(-50%); }
.cover-narration-text { position: absolute; top: 3px; left: 0; width: 100%; margin: 0; color: #503b31; font: 500 32px/1.35 "Songti SC", "STSong", "Noto Serif CJK SC", "SimSun", serif; letter-spacing: 2px; text-align: center; text-shadow: 0 1px 3px rgb(255 248 230 / 45%); }
.cover-narration-text span { display: block; white-space: nowrap; }

.cover-start { position: absolute; z-index: 1; left: 57%; top: 75%; width: 300px; height: max(90px, var(--stage-min-hit, 90px)); padding: 0; border: 0; border-radius: 12px; background: transparent; transform: translate(-50%, -50%); color: #fff3dc; -webkit-text-fill-color: #fff3dc; font: 500 32px/1 "Songti SC", "STSong", "Noto Serif CJK SC", "SimSun", serif; letter-spacing: 3px; opacity: 1; }
.cover-start .cover-art { position: absolute; top: 50%; left: 0; transform: translateY(-50%); }
.cover-start-text { position: relative; display: block; text-shadow: 0 1px 2px rgb(42 25 14 / 75%); }
.cover-start:disabled { cursor: default; opacity: 1; }
.cover-preview-caption { position: fixed; z-index: 4; bottom: max(18px, env(safe-area-inset-bottom)); left: max(16px, env(safe-area-inset-left)); margin: 0; padding: 4px 8px; border-radius: 4px; color: #eddfc9; background: rgb(37 30 26 / 66%); font-size: 11px; line-height: 1.5; }

@media (max-width: 480px) {
  .cover-preview-caption { bottom: auto; top: max(12px, env(safe-area-inset-top)); left: 50%; transform: translateX(-50%); white-space: nowrap; }
}