*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#f6f8fb;margin:0;color:#1f2937}
:root{--primary:#1f6feb;--accent:#175bd1;--card:#ffffff;--border:#e6ecf5;--muted:#6b7280}
.theme-1{--primary:#1f6feb}
.theme-2{--primary:#10b981}
.theme-3{--primary:#f59e0b}
.theme-4{--primary:#ef4444}
.theme-5{--primary:#6366f1}
.theme-6{--primary:#06b6d4}
.theme-7{--primary:#8b5cf6}
.container{max-width:760px;margin:0 auto;padding:16px;padding-left:calc(16px + env(safe-area-inset-left));padding-right:calc(16px + env(safe-area-inset-right))}
h1.page-title{font-size:22px;margin:8px 0 12px;color:#111827}
.page-title-cn{font-size:18px;color:#6b7280}
.page-title-en{font-size:36px;font-weight:800;letter-spacing:2px;color:var(--primary);margin:4px 0 12px}
h2{font-size:18px;margin:8px 0}
.badge{display:inline-block;background:var(--primary);color:#fff;border-radius:999px;padding:4px 10px;font-size:12px;margin-right:8px}
.lead{color:#555;line-height:1.6}
.form-row{display:flex;flex-direction:column;margin:10px 0}
.form-row label{font-size:14px;color:#555;margin-bottom:6px}
input,select,textarea{padding:12px;border:1px solid #dbe1ea;border-radius:10px;background:#fff;font-size:16px}
.btn{background:#e5e7eb;color:#111827;border:none;border-radius:12px;padding:12px 16px;font-size:16px;cursor:pointer}
.btn.block{display:block;width:100%;text-align:center}
.btn.lg{padding:14px 18px;font-size:17px}
.mt{margin-top:16px}
.btn.primary{background:var(--primary);color:#fff}
.btn:hover{filter:brightness(0.95)}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;margin:12px 0;box-shadow:0 6px 18px rgba(17,24,39,0.06)}
.examples ul{margin:6px 0 0 18px}
.example-item{margin-bottom:10px}
.ex-en{font-size:15px}
.ex-cn{margin-top:4px}
.muted{color:var(--muted)}
.small{font-size:12px}
.success{color:#1a7f37}
.notice{padding:10px;border-radius:10px;margin:10px 0;background:#f1f5f9;border:1px dashed #cbd5e1}
.notice.success{background:#e8f6ec;border:1px solid #cbead3}
.list{list-style:none;padding:0}
.item{padding:10px 0;border-bottom:1px solid #eee}
.link{color:#1f6feb;text-decoration:none}
.link:hover{text-decoration:underline}
.poster img{width:100%;border-radius:12px;border:1px solid #e6ecf5}
.recorder{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:12px}
.stack{flex-direction:column;align-items:stretch}
.recorder .btn{width:100%}
.btn + .btn{margin-top:12px}
.topbar{display:flex;justify-content:flex-end}