:root{--paper:#edf3f6;--panel:#fff;--ink:#17364b;--muted:#657e8e;--blue:#176184;--line:#d7e2e9;--orange:#b95d2d;--soft:#e6f0f5;--green:#26785f}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 'Segoe UI','Microsoft YaHei',sans-serif}header,main,footer{max-width:1120px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}a{color:inherit;text-decoration:none}.brand{display:flex;gap:12px;align-items:center;font-weight:700;letter-spacing:1px}.brand small{display:block;font-size:11px;letter-spacing:2px;color:var(--muted);font-weight:400}.tvmark{display:grid;place-items:center;width:44px;height:36px;border:3px solid var(--ink);border-radius:10px;font:700 15px Georgia,serif;position:relative}.tvmark:before{content:'';position:absolute;top:-9px;width:12px;height:6px;border-left:2px solid;border-right:2px solid;transform:skew(-20deg)}h1{font:500 clamp(25px,4vw,36px)/1.35 'Microsoft YaHei',sans-serif;letter-spacing:-1px;margin:8px 0 18px}h2{font-size:18px;margin:0 0 20px;font-weight:650}.eyebrow{font-size:12px;color:var(--blue);letter-spacing:2px;margin:0}.muted{font-size:13px;color:var(--muted)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 3px 12px #17364b04}.login{max-width:500px;margin:8vh auto}.login form{margin-top:30px}label{display:block;font-size:14px;font-weight:550;margin-bottom:14px}input,select,textarea,button{font:inherit}input:not([type=range]):not([type=color]),select,textarea{display:block;width:100%;border:1px solid var(--line);border-radius:8px;background:#f8fbfd;color:var(--ink);padding:11px 12px;margin-top:7px}textarea{resize:vertical;min-height:115px}button{cursor:pointer;border:0;border-radius:8px;padding:11px 20px;background:var(--blue);color:#fff;font-size:14px;font-weight:650;transition:background .15s}button:hover{filter:brightness(.93)}button:disabled{opacity:.45;cursor:not-allowed}.quiet{background:transparent;color:var(--muted)}.secondary{background:var(--soft);color:var(--blue);width:100%}.danger{margin-top:22px;background:#fff4ee;color:#a64b2c;width:100%}:focus-visible{outline:3px solid #d7a65e;outline-offset:3px}.toolbar{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:20px 0 24px}.device-select{min-width:180px}.layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:22px;align-items:start}.section-title{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}.section-title h2{margin:0}.badge{border-radius:99px;font-size:12px;background:#e9edf0;color:var(--muted);padding:3px 10px}.badge.online{background:#e3f3ec;color:var(--green)}.screen-shell{width:250px;margin:25px auto 30px;background:#bbcbd5;border:1px solid #a6b9c4;border-radius:25px;padding:15px 15px 0;box-shadow:0 12px 0 -8px #839cae,0 16px 30px #17364b12}.screen{height:212px;border:8px solid #254253;border-radius:20px;background:#142e40;color:#e5f4f7;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:14px;position:relative;overflow:hidden}.screen p{white-space:pre-wrap;overflow-wrap:anywhere;text-align:center;font-size:19px;max-height:150px;overflow:auto;margin:0}.screen>span{position:absolute;bottom:8px;font-size:9px;letter-spacing:3px;color:#7998a9}.screen-chin{height:35px;display:flex;align-items:center;justify-content:space-between;padding:0 8px;font:9px/1 Consolas,monospace;letter-spacing:3px}.screen-chin i{display:block;width:5px;height:5px;border-radius:50%;background:#d8e6ed}.screen-chin i:last-child{background:#83a79a}#char-count{float:right;color:var(--muted);font:12px Consolas,monospace}.send-row{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-top:12px}.send-row label{margin:0;min-width:105px}.send-row button{margin-top:23px}.controls{display:grid;gap:22px}dl{display:grid;grid-template-columns:auto 1fr;font-size:13px;gap:10px;margin:0}dt{color:var(--muted)}dd{margin:0;text-align:right;word-break:break-word}fieldset{border:0;padding:0;margin:0;min-width:0}form+form{margin-top:22px}input[type=range]{width:100%;accent-color:var(--blue);display:block;margin-top:15px}output{float:right;font:13px Consolas,monospace}.controls form{padding-top:20px;border-top:1px solid var(--line);margin-top:20px}.color-row{display:grid;grid-template-columns:80px 1fr;gap:20px}input[type=color]{display:block;width:100%;height:45px;border:1px solid var(--line);border-radius:8px;background:transparent;margin-top:7px}.history{grid-column:1/-1}.history-row{display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:15px;padding:13px 0;border-bottom:1px solid var(--line);font-size:13px}.history-row:last-child{border-bottom:0}.history-row p{margin:0;overflow-wrap:anywhere;white-space:pre-wrap}.history-row small{display:block;color:var(--muted)}.status-completed{color:var(--green)}.status-failed,.status-expired{color:var(--orange)}#notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;border-radius:10px;padding:12px 22px;box-shadow:0 6px 24px #0002;max-width:90vw;z-index:10}footer{text-align:center;color:var(--muted);font-size:12px;padding-bottom:30px}[hidden]{display:none!important}@media(max-width:720px){header,main,footer{padding:20px 16px}.layout{grid-template-columns:1fr}.toolbar{display:block}.device-select{max-width:240px}.panel{padding:22px}.history-row{grid-template-columns:1fr auto;gap:5px 12px}.history-row time{grid-column:1/-1;color:var(--muted)}.history{grid-column:auto}.login{margin:6vh auto}.toolbar h1{font-size:26px}.screen-shell{margin:22px auto}.send-row button{padding:12px 16px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}