* { box-sizing: border-box; }
body { margin: 0; background: #f4f1fb; color: #241c33; font-family: "Segoe UI", "Microsoft YaHei", sans-serif; }
.page { width: min(920px, calc(100% - 32px)); margin: 0 auto; padding: 36px 0 12px; }
h1 { margin: 0 0 8px; font-size: 32px; font-weight: 650; letter-spacing: -0.02em; }
.intro { margin: 0 0 22px; max-width: 640px; line-height: 1.7; color: #4d4560; }
.track { display: flex; align-items: stretch; gap: 0; background: #fff; border-radius: 999px; overflow: hidden; box-shadow: 0 10px 30px rgba(70, 40, 120, 0.08); }
.lane { flex: 1; display: flex; align-items: center; gap: 14px; min-height: 84px; padding: 0 22px; cursor: pointer; }
.lane input { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.lane.is-over { background: #f3e9ff; }
.bars { display: flex; align-items: flex-end; gap: 4px; height: 36px; }
.bars i { display: block; width: 5px; border-radius: 3px; background: #7c4dff; }
.bars i:nth-child(1) { height: 10px; } .bars i:nth-child(2) { height: 22px; }
.bars i:nth-child(3) { height: 16px; } .bars i:nth-child(4) { height: 32px; }
.bars i:nth-child(5) { height: 18px; } .bars i:nth-child(6) { height: 28px; }
.bars i:nth-child(7) { height: 12px; } .bars i:nth-child(8) { height: 24px; }
.bars i:nth-child(9) { height: 14px; } .bars i:nth-child(10) { height: 30px; }
.bars i:nth-child(11) { height: 18px; } .bars i:nth-child(12) { height: 8px; }
.lane-label { color: #5c5370; }
#convert-btn { border: 0; background: #5b2ee0; color: #fff; padding: 0 22px; font: inherit; font-weight: 650; cursor: pointer; }
#convert-btn:disabled { background: #c9bddf; cursor: not-allowed; }
.file-list, .result-list { list-style: none; margin: 14px 0 0; padding: 0; }
.file-list li, .result-list li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 4px; border-bottom: 1px solid #e4dcf2; }
.file-remove { border: 0; background: transparent; color: #5b2ee0; cursor: pointer; font: inherit; }
.progress { margin-top: 14px; height: 6px; border-radius: 99px; background: #e4dcf2; overflow: hidden; }
.progress-bar { height: 100%; width: 0; background: #5b2ee0; }
.status { min-height: 1.4em; color: #5c5370; }
.status.is-error, .result-list .is-error { color: #b42318; }
.result-link { color: #5b2ee0; font-weight: 650; }
.strip { margin-top: 22px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 18px; background: #ebe4f8; border-radius: 16px; }
.strip strong { display: block; font-size: 18px; }
.strip span { color: #4d4560; font-size: 14px; }
.strip a { flex: none; background: #241c33; color: #fff; text-decoration: none; padding: 10px 16px; border-radius: 999px; font-weight: 650; }
.foot { width: min(920px, calc(100% - 32px)); margin: 18px auto 36px; color: #5c5370; }
.related { display: flex; flex-wrap: wrap; gap: 8px 14px; margin: 0; padding: 0; list-style: none; }
.related a { color: #5b2ee0; text-decoration: none; }
@media (max-width: 700px) {
    .track { border-radius: 20px; flex-direction: column; }
    #convert-btn { min-height: 48px; }
    .strip { flex-direction: column; align-items: flex-start; }
}