.web-hint{position:fixed;right:12px;bottom:12px;z-index:400;background:rgba(20,22,28,.92);border:1px solid #2a2f3e;border-radius:10px;padding:8px 14px;font-size:12px;color:#9aa3b5;max-width:300px;line-height:1.5}
    .web-hint b{color:#e8eaf0}
    .web-hint .hint-close{position:absolute;top:4px;right:8px;cursor:pointer;color:#6b7385;font-size:14px}
    .web-hint .hint-close:hover{color:#e8eaf0}
    .ffmpeg-loading{position:fixed;top:64px;right:14px;z-index:400;font-size:12px;color:#9aa3b5;background:rgba(20,22,28,.9);border:1px solid #2a2f3e;border-radius:8px;padding:6px 12px}
    .ffmpeg-loading.ok{color:#34d399}
    .ffmpeg-loading.err{color:#f87171}
    /* 标题栏内下载按钮(融入顶栏,不占额外行) */
    .dltip{font-size:11.5px;color:#9aa3b5;margin-right:8px;white-space:nowrap}
    .dlbt{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(120deg,#5b8cff,#7c5bff);color:#fff;text-decoration:none;padding:6px 14px;border-radius:8px;font-size:12.5px;font-weight:600;transition:opacity .15s;margin-right:8px}
    .dlbt:hover{opacity:.9}
    .dlsm{color:#9aa3b5;font-size:12px;text-decoration:none;padding:6px 8px;border-radius:8px;margin-right:8px}
    .dlsm:hover{color:#e8eaf0}
  
.back-link{color:#9aa3b5;font-size:13px;text-decoration:none;padding:6px 12px;border-radius:8px;border:1px solid #2a2f3e}
.back-link:hover{color:#e8eaf0;border-color:#5b8cff}
.hint-accent{color:#5b8cff}