:root{--nav:#111936;--blue:#3468f4;--cyan:#27c9d8;--green:#22b573;--yellow:#f5b942;--red:#e64d68;--ink:#1c2846;--muted:#6f7d9b;--line:#dce4f2;--paper:#f4f7fc;--white:#fff;--shadow:0 16px 44px rgba(21,39,78,.12)}
*{box-sizing:border-box}html{font-size:16px}body{margin:0;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:var(--paper);color:var(--ink)}button,input,select,textarea{font:inherit}button{cursor:pointer}.hidden{display:none!important}.shell{min-height:100vh}.topbar{height:72px;background:linear-gradient(110deg,#101936,#18275a);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 28px;box-shadow:0 8px 30px #0b163633;position:sticky;top:0;z-index:20}.logo{display:flex;align-items:center;gap:12px;font-weight:900}.logo i{font-style:normal;width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#49e0e6,#536fff);display:grid;place-items:center;font-size:23px}.topmeta{display:flex;gap:10px;align-items:center}.chip{padding:8px 13px;border-radius:999px;background:#ffffff16;border:1px solid #ffffff22;font-weight:800;font-size:.9rem}.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#75809a;margin-right:6px}.dot.on{background:#62e7a7;box-shadow:0 0 12px #62e7a7}.layout{display:grid;grid-template-columns:250px minmax(0,1fr);min-height:calc(100vh - 72px)}.sidebar{background:#fff;border-right:1px solid var(--line);padding:24px 18px}.nav-title{font-size:.78rem;letter-spacing:.12em;color:#96a2b8;font-weight:900;margin:8px 10px}.nav{display:grid;gap:7px}.nav button{border:0;border-radius:13px;background:transparent;text-align:left;padding:12px 14px;color:#53617e;font-weight:800}.nav button.active,.nav button:hover{background:#edf2ff;color:#315bd3}.main{padding:26px;min-width:0}.page-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:22px}.page-head h1{font-size:1.75rem;margin:0 0 6px}.sub{color:var(--muted);line-height:1.6}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:minmax(0,1.12fr) minmax(330px,.88fr)}.grid.three{grid-template-columns:repeat(3,1fr)}.card{background:#fff;border:1px solid #e2e8f3;border-radius:20px;padding:20px;box-shadow:0 8px 24px rgba(28,47,86,.05)}.card h2,.card h3{margin:0 0 14px}.card-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}.stat{font-size:2rem;font-weight:1000}.stat small{font-size:.9rem;color:var(--muted);font-weight:700}.btn{border:0;border-radius:13px;padding:11px 16px;font-weight:900;background:#edf2fc;color:#42506c}.btn.primary{background:linear-gradient(135deg,#3e72f5,#5c56df);color:#fff;box-shadow:0 8px 18px #405fe633}.btn.green{background:var(--green);color:#fff}.btn.red{background:#ffe9ee;color:#bd2947}.btn.yellow{background:#fff1c9;color:#945d00}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-row{display:flex;gap:10px;flex-wrap:wrap}.field{display:grid;gap:7px;margin-bottom:14px}.field label{font-weight:900;font-size:.92rem}.field input,.field select,.field textarea{width:100%;border:2px solid #dbe3f1;border-radius:13px;padding:11px 13px;background:#fff;color:var(--ink);outline:0}.field textarea{min-height:118px;resize:vertical;line-height:1.6}.field input:focus,.field select:focus,.field textarea:focus{border-color:#5678ed;box-shadow:0 0 0 4px #5678ed18}.switchline{display:flex;align-items:center;gap:9px;margin:12px 0;font-weight:800}.switchline input{width:20px;height:20px}.empty{min-height:230px;display:grid;place-items:center;text-align:center;color:var(--muted);border:2px dashed #dbe3f1;border-radius:17px;padding:24px}.empty b{display:block;color:#42506c;font-size:1.1rem;margin:8px}.urlbox{display:flex;align-items:center;gap:10px;background:#0f1835;color:#d8e5ff;border-radius:14px;padding:12px 14px;font-family:Consolas,monospace;word-break:break-all}.urlbox span{flex:1}.seat-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:7px}.seat{aspect-ratio:1;display:grid;place-items:center;border-radius:10px;background:#edf1f8;color:#78849a;font-weight:900;border:0}.seat.joined{background:#dff8ec;color:#14734a}.seat.offline{background:#fff0d8;color:#9b650b}.seat.missing{outline:3px solid #ffb7c4}.bars{display:grid;gap:14px}.bar-label{display:flex;justify-content:space-between;gap:12px;margin-bottom:6px;font-weight:800}.bar-track{height:16px;border-radius:99px;background:#e8edf5;overflow:hidden}.bar-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,#38cbd7,#4f65ed);transition:width .35s}.answer-list{display:grid;gap:9px}.answer{padding:10px 12px;border-radius:12px;background:#f5f7fc;display:flex;justify-content:space-between;gap:10px}.rank-table{width:100%;border-collapse:collapse}.rank-table th,.rank-table td{padding:11px 9px;border-bottom:1px solid #edf0f6;text-align:left}.rank-table th{color:#7a879d;font-size:.84rem}.rank-no{font-size:1.15rem;font-weight:1000;color:#4e62dc}.notice{padding:12px 14px;border-radius:13px;background:#e9f8ff;color:#226487;line-height:1.6}.notice.warn{background:#fff2d5;color:#8c5e07}.notice.bad{background:#ffebef;color:#a22d46}.toast{position:fixed;z-index:100;right:22px;top:86px;max-width:360px;padding:13px 17px;border-radius:14px;background:#14335b;color:#fff;box-shadow:var(--shadow);opacity:0;transform:translateY(-12px);pointer-events:none;transition:.22s}.toast.show{opacity:1;transform:none}.section{display:none}.section.active{display:block}.kicker{color:#3b63de;font-weight:1000;font-size:.82rem;letter-spacing:.08em}.screen-only{min-height:100vh;padding:3.5vh 4vw;background:radial-gradient(circle at 50% 0,#263d87,#0c1536 65%);color:#fff}.screen-title{text-align:center;font-size:clamp(2rem,5vw,4.7rem);margin:1vh 0}.screen-sub{text-align:center;color:#bdccef;font-size:clamp(1rem,1.8vw,1.5rem)}.screen-panel{width:min(1200px,95vw);margin:4vh auto;padding:clamp(20px,3vw,42px);border:1px solid #bfe8ff33;border-radius:30px;background:#ffffff10;backdrop-filter:blur(12px)}.screen-only .bar-track{height:24px;background:#ffffff1c}.screen-only .bar-label{font-size:clamp(1rem,2vw,1.5rem)}.screen-only .bar-fill{background:linear-gradient(90deg,#4be2d4,#6b84ff)}.big-rank{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.podium{padding:22px;border-radius:22px;background:#ffffff12;text-align:center}.podium .place{font-size:2.5rem}.podium .seatnum{font-size:2rem;font-weight:1000}.student{min-height:100vh;background:radial-gradient(circle at 50% 0,#3157ae,#111936 58%);padding:24px;color:#fff}.student-wrap{max-width:760px;margin:auto}.student-head{text-align:center;padding:18px 0 28px}.student-head h1{margin:8px;font-size:clamp(2rem,5vw,3.3rem)}.student-card{background:#fff;color:var(--ink);border-radius:26px;padding:clamp(20px,5vw,34px);box-shadow:0 24px 70px #050d2399}.seat-login{display:flex;gap:12px;align-items:flex-end}.seat-login .field{flex:1;margin:0}.seat-login input{font-size:1.5rem;text-align:center}.choice-list{display:grid;gap:12px;margin:20px 0}.choice{width:100%;text-align:left;border:2px solid #dbe3f1;border-radius:15px;padding:14px 16px;background:#fff;color:var(--ink);font-weight:900}.choice:hover,.choice.selected{border-color:#526fe7;background:#edf2ff}.student-status{text-align:center;color:#b9caef;margin-top:16px}.pulse{animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{50%{opacity:.55}}@media(max-width:950px){.layout{grid-template-columns:1fr}.sidebar{display:none}.grid.two,.grid.three{grid-template-columns:1fr}.seat-grid{grid-template-columns:repeat(6,1fr)}}@media(max-width:600px){.topbar{padding:0 14px}.topmeta .chip:first-child{display:none}.main{padding:16px}.page-head{display:block}.seat-grid{grid-template-columns:repeat(5,1fr)}.seat-login{display:grid}.big-rank{grid-template-columns:1fr}.reportBody{grid-template-columns:1fr}}