.platform-login-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:20px}
.platform-login-card{padding:24px;border:1px solid var(--line);border-radius:18px;background:var(--panel);min-width:0}
.platform-login-card h3{margin:0 0 16px}.platform-login-state{color:var(--lime);min-height:48px}
.platform-login-instruction{font-size:14px;color:var(--muted)}
.platform-login-qr{display:block;width:100%;max-width:900px;min-width:0;height:auto;background:#fff;border:12px solid #fff;border-radius:12px;image-rendering:pixelated;margin:18px auto}
.platform-login-qr[hidden]{display:none}.platform-login-card:has(.platform-login-qr:not([hidden])){grid-column:1/-1}
.platform-login-card[data-platform-login=xiaohongshu] .platform-login-qr,.platform-login-card[data-platform-login=channels] .platform-login-qr{max-width:380px}
.platform-login-actions{display:flex;flex-wrap:wrap;gap:12px}.platform-login-actions button{max-width:100%}
.platform-login-notice{color:var(--lime);line-height:1.6}.platform-login-notice:empty{display:none}
.platform-login-success{background:var(--lime);color:#13200d;border-radius:12px;padding:18px;font-size:22px;font-weight:700;margin:14px 0;overflow-wrap:anywhere}
.platform-login-success[hidden]{display:none}
.platform-login-verification{padding:18px;margin:16px 0;background:rgba(185,240,113,.07);border:1px solid var(--lime);border-radius:12px}
.platform-login-verification[hidden]{display:none}
.platform-login-verification h4{margin:0 0 12px;color:var(--lime);font-size:18px}
.platform-login-verification button{margin:0 8px 8px 0}
.platform-login-verification label{display:block;margin-bottom:14px}
.platform-login-verification input{display:block;box-sizing:border-box;width:100%;margin-top:8px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--text);font-size:20px;letter-spacing:.25em}
.platform-login-verification input:focus{outline:2px solid var(--lime);outline-offset:2px}
/* 登录是账号级操作，不让本期提纲把二维码和成功状态推到首屏之外。 */
body:has(#panel-platforms.is-visible) #topic-episodes{display:none}
@media(max-width:600px){.platform-login-card{padding:16px}.platform-login-qr{border-width:8px}}