:root { color-scheme: light; font-family: system-ui, -apple-system, "Microsoft YaHei", sans-serif; color: #1d2635; background: #f4f6f8; }
* { box-sizing: border-box; }
body { margin: 0; }
.shell { max-width: 880px; margin: 0 auto; padding: 72px 24px; }
header { margin-bottom: 32px; }
.eyebrow { margin: 0 0 8px; color: #55708f; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
h1 { margin: 0; font-size: 42px; letter-spacing: -.04em; }
h2 { margin: 0; font-size: 20px; line-height: 1.45; }
.intro { color: #687487; line-height: 1.7; }
.form-card, .result { background: #fff; border: 1px solid #e2e7ed; border-radius: 18px; padding: 24px; box-shadow: 0 12px 36px rgba(29, 38, 53, .06); }
label { display: block; margin-bottom: 10px; font-weight: 650; }
textarea { width: 100%; resize: vertical; border: 1px solid #d6dde6; border-radius: 10px; padding: 13px; font: inherit; line-height: 1.6; }
button { border: 0; border-radius: 10px; padding: 11px 18px; margin-top: 14px; background: #1d2635; color: #fff; font: inherit; cursor: pointer; }
button:disabled { opacity: .55; cursor: wait; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.actions button { margin-top: 14px; }
.secondary { margin: 0; background: #edf2f7; color: #1d2635; }
.status { min-height: 24px; margin: 12px 0 0; color: #687487; }
.result { margin-top: 24px; }
.result-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 20px; }
.transcript { white-space: pre-wrap; font: inherit; line-height: 1.85; margin: 0; }
.raw { color: #687487; }
details { margin-top: 20px; border-top: 1px solid #edf0f3; padding-top: 16px; }
summary { cursor: pointer; color: #55708f; }
.hidden { display: none; }
.download-result { margin-top: 24px; }
.download-link { display: inline-flex; align-items: center; border-radius: 10px; padding: 11px 18px; background: #1d2635; color: #fff; text-decoration: none; }
.download-note { margin: 0; color: #687487; line-height: 1.7; }
.download-spec { margin: 0 0 8px; color: #1d2635; font-weight: 650; }
@media (max-width: 640px) { .shell { padding: 40px 16px; } h1 { font-size: 34px; } .result-head { display: block; } .secondary { margin-top: 16px; } }