:root{--bg:#020704;--surface:#06100a;--line:#1d6a37;--green:#79f381;--ink:#d5f6d6;--dim:#82ae8a;--red:#ff6969;--amber:#ffc34a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.65 "Microsoft YaHei",Arial,sans-serif;min-height:100vh}#matrix-rain{position:fixed;inset:0;width:100%;height:100%;opacity:.2;z-index:-2}.site-header{height:70px;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 3%;background:rgba(2,7,4,.88);backdrop-filter:blur(8px);gap:36px}.brand,.mono,pre,.terminal-bar,.site-header nav a,button,input,select,textarea,footer{font-family:Consolas,"Microsoft YaHei",monospace}.brand{font-size:25px;font-weight:700;letter-spacing:1px;color:var(--green);text-decoration:none;white-space:nowrap}.brand span{font-size:31px}.site-header nav{display:flex;gap:40px;margin:auto}.site-header a{color:var(--ink);text-decoration:none}.site-header nav a:hover,.header-actions a:hover{color:var(--green)}.header-actions{display:flex;align-items:center;gap:15px}.header-actions a,.header-actions button{border:1px solid var(--green);padding:6px 13px}.header-actions form,.inline{display:inline}.header-actions button{background:transparent;color:var(--green);cursor:pointer}main{max-width:1440px;margin:auto;padding:0 4%}.hero{min-height:550px;display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:50px;border-bottom:1px solid var(--line)}h1,h2,p{margin-top:0}h1{font-size:clamp(42px,5vw,80px);line-height:1.16;letter-spacing:-2px;font-weight:900;color:var(--green)}h2{font-size:21px;color:var(--green)}.hero-copy p,.page-head p{font-size:19px;color:var(--dim);max-width:660px}.terminal-button{display:inline-block;background:transparent;border:1px solid var(--green);outline:1px solid #315e3b;outline-offset:4px;color:var(--green);padding:13px 25px;text-decoration:none;font:700 16px Consolas,"Microsoft YaHei",monospace;cursor:pointer;margin-top:16px}.terminal-button:hover{background:#12371a}.terminal-window,.panel,.stat,.challenge-row,.empty-state{background:rgba(3,14,7,.9);border:1px solid var(--line);box-shadow:0 0 22px rgba(40,255,101,.06)}.terminal-window{min-height:370px}.terminal-bar{padding:9px 15px;border-bottom:1px solid var(--line);color:var(--green)}.terminal-bar span{float:right}pre{padding:18px 25px;color:#9def9f;white-space:pre-wrap;line-height:1.7;font-size:13px}pre b{color:#426d47;margin-right:10px}pre i{animation:blink .9s infinite}@keyframes blink{50%{opacity:0}}.home-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:60px 0}.home-strip>div{background:var(--bg);padding:32px}.home-strip p{color:var(--dim)}.page-head{padding:70px 0 36px;border-bottom:1px solid var(--line)}.page-head h1{font-size:46px;margin:8px 0}.mono{color:var(--green);font-size:13px}.notice{border-left:3px solid var(--amber);background:#1c1a09;color:#ffe8a6;padding:10px 15px;margin:20px 0}.challenge-list{margin:30px 0 80px}.list-head,.challenge-row summary{display:grid;grid-template-columns:1.8fr .65fr .5fr .65fr;gap:15px;align-items:center}.list-head{padding:12px 20px;color:var(--dim);font:12px Consolas,monospace}.challenge-row{margin-bottom:10px}.challenge-row summary{cursor:pointer;padding:19px 20px;list-style:none}.challenge-row summary::-webkit-details-marker{display:none}.challenge-row summary b{color:var(--dim);margin-right:15px}.challenge-row[open] summary{border-bottom:1px solid var(--line);color:var(--green)}.challenge-content{padding:22px 20px}.challenge-content p{white-space:pre-line}.challenge-content form{display:flex;gap:16px}.challenge-content input{flex:1}.success{color:var(--green)}.danger{color:var(--red)}.muted,.form-hint{color:var(--dim)}.empty-state{padding:45px;text-align:center;color:var(--dim)}a{color:var(--green)}input,select,textarea{width:100%;background:#020704;border:1px solid #307842;color:var(--ink);padding:10px;margin-top:6px;font-size:14px}textarea{min-height:95px;resize:vertical}label{display:block;color:var(--dim);margin:12px 0}.auth-layout{min-height:calc(100vh - 130px);display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:70px}.auth-intro h1,.admin-login h1{font-size:56px}.auth-panels,.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.panel{padding:25px}.panel h2{margin-bottom:14px}.text-button,.danger-button{border:0;background:transparent;padding:6px;color:var(--green);cursor:pointer;font:13px Consolas,monospace}.danger-button{color:var(--red)}.admin-login{min-height:calc(100vh - 130px);display:grid;place-items:center}.admin-login .panel{width:min(460px,100%)}.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:30px 0}.stat-row.four{grid-template-columns:repeat(4,1fr)}.stat{padding:20px}.stat span{display:block;color:var(--dim);font-size:13px}.stat strong{font:700 36px Consolas,monospace;color:var(--green)}.split-section{display:grid;grid-template-columns:1.4fr 1fr;gap:18px;margin-bottom:70px}.admin-shell{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 130px);margin:0 -4%}.admin-side{border-right:1px solid var(--line);padding:32px 18px;background:rgba(1,10,4,.75)}.admin-side a,.admin-side button{display:block;color:var(--ink);text-decoration:none;width:100%;padding:12px 10px;border:0;border-bottom:1px solid #12341d;background:transparent;text-align:left;font:14px Consolas,monospace;cursor:pointer}.admin-side a:hover,.admin-side button:hover{color:var(--green);background:#092111}.admin-content{padding:45px}.admin-title h1{font-size:40px;margin:6px 0 25px}.admin-grid{grid-template-columns:360px 1fr;align-items:start}.editor{position:sticky;top:15px}.form-two{display:grid;grid-template-columns:1fr 1fr;gap:12px}fieldset{border:1px solid var(--line);margin:18px 0;padding:10px}legend{color:var(--dim);font:13px Consolas,monospace}.check{display:inline-flex;align-items:center;gap:6px;width:auto;margin:5px 10px 5px 0}.check input{width:auto;margin:0}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:13px}th,td{padding:10px 8px;border-bottom:1px solid #164221;text-align:left;vertical-align:top}th{color:var(--dim);font:12px Consolas,monospace;font-weight:400}td small{display:block;color:var(--dim)}.batch-bar{padding:8px 0 17px;color:var(--dim);font-size:13px}.wide{margin-top:18px}footer{border-top:1px solid var(--line);padding:18px 4%;display:flex;justify-content:space-between;color:#4a8252;font-size:11px}
@media(max-width:850px){.site-header{padding:0 15px;gap:15px}.site-header nav{display:none}.brand{font-size:18px}.header-actions{gap:8px}.header-actions a,.header-actions button{padding:5px;font-size:11px}main{padding:0 5%}.hero,.auth-layout,.split-section{grid-template-columns:1fr;gap:30px}.hero{padding:55px 0;min-height:0}.hero h1{font-size:46px}.home-strip,.auth-panels,.admin-grid,.stat-row,.stat-row.four{grid-template-columns:1fr}.list-head{display:none}.challenge-row summary{grid-template-columns:1fr auto;gap:8px}.challenge-row summary span:nth-child(2),.challenge-row summary span:nth-child(3){display:none}.challenge-content form{flex-direction:column}.admin-shell{display:block;margin:0 -5%}.admin-side{display:flex;gap:4px;overflow:auto;padding:10px;border-right:0;border-bottom:1px solid var(--line)}.admin-side span{display:none}.admin-side a,.admin-side button{white-space:nowrap;width:auto;border:1px solid #164221;padding:7px;font-size:11px}.admin-content{padding:30px 5%}.editor{position:static}.auth-intro h1,.admin-login h1{font-size:45px}footer{font-size:9px}}
.group-heading{display:flex;justify-content:space-between;align-items:center;margin:38px 0 8px;padding:12px 16px;border-left:3px solid var(--green);background:rgba(11,42,19,.55);color:var(--dim);font:13px Consolas,"Microsoft YaHei",monospace}.group-heading:first-child{margin-top:0}.empty-state.compact{padding:24px;margin-bottom:14px}
.type-heading{display:flex;justify-content:space-between;align-items:center;margin:20px 0 0;padding:9px 16px;border-bottom:1px solid #1d6a37;color:#a6d8aa;background:rgba(7,25,11,.55);font:12px Consolas,"Microsoft YaHei",monospace}.type-heading+ .list-head{margin-top:0}
.challenge-category-tabs{display:flex;flex-wrap:wrap;gap:7px}.challenge-category-tab{margin:0;cursor:pointer}.challenge-category-tab input{position:absolute;opacity:0;pointer-events:none}.challenge-category-tab span{display:block;border:1px solid #286b38;color:var(--dim);padding:7px 10px;font:12px Consolas,"Microsoft YaHei",monospace}.challenge-category-tab input:checked+span{border-color:var(--green);background:#12371a;color:var(--green);box-shadow:0 0 12px rgba(80,255,112,.14)}
.score-table{margin-bottom:70px}.score-total{color:var(--green);font:700 18px Consolas,monospace}.score-details summary{color:var(--green);cursor:pointer}.score-details ul{margin:9px 0 0;padding-left:16px;min-width:250px}.score-details li{margin:6px 0;color:var(--ink)}.score-details li span{display:block;color:var(--dim);font-size:12px}
.batch-challenge-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;border-bottom:1px solid #174624;margin-bottom:10px}.batch-challenge-bar label{margin:0;color:var(--dim);font-size:13px}.batch-challenge-bar select{display:inline-block;width:auto;min-width:150px;margin:0;padding:6px 8px}
.settings-panel{max-width:720px;margin-bottom:70px}.setting-options{display:grid;gap:10px;margin:22px 0}.setting-option{display:block;margin:0;cursor:pointer}.setting-option input{position:absolute;opacity:0;pointer-events:none}.setting-option span{display:block;border:1px solid #286b38;padding:15px 18px;color:var(--dim)}.setting-option b,.setting-option small{display:block}.setting-option b{color:var(--ink);font-size:16px}.setting-option small{margin-top:4px}.setting-option input:checked+span{border-color:var(--green);background:#102b16;box-shadow:0 0 18px rgba(67,250,97,.12)}.setting-option input:checked+span b{color:var(--green)}
.stat-row.two{grid-template-columns:repeat(2,1fr)}
.terminal-hero{min-height:calc(100vh - 130px);display:grid;place-items:center;padding:42px 0}.live-terminal-frame{width:min(1120px,100%);height:min(680px,calc(100vh - 210px));min-height:440px;background:#020704;border:1px solid #39a654;box-shadow:0 0 0 5px rgba(15,87,38,.12),0 0 55px rgba(19,230,72,.16);display:flex;flex-direction:column}.live-terminal-bar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #1d6a37;color:#72e883;font:13px Consolas,"Microsoft YaHei",monospace;background:rgba(5,25,10,.93)}.live-terminal-bar span{display:flex;gap:7px}.live-terminal-bar i{display:block;width:8px;height:8px;border-radius:50%;background:#45dc67}.live-terminal-bar i:nth-child(2){background:#dfb94e}.live-terminal-bar i:nth-child(3){background:#d35a5a}.live-terminal-bar em{font-style:normal;color:#527d5b;font-size:11px}.live-terminal{padding:26px 30px;overflow:auto;flex:1;color:#9af1a4;font:15px/1.7 Consolas,"Microsoft YaHei",monospace;text-shadow:0 0 8px rgba(89,255,122,.25)}.live-terminal p{margin:0;min-height:25px;white-space:pre-wrap;word-break:break-word}.live-terminal .prompt{color:#65f87e;font-weight:700}.live-terminal .command::after{content:'_';display:inline-block;color:#7cfb8d;animation:blink .85s step-end infinite}.live-terminal .output{color:#80b889}.live-terminal .success-output{color:#d9ff86;font-weight:700}@media(max-width:850px){.terminal-hero{min-height:calc(100vh - 125px);padding:25px 0}.live-terminal-frame{height:calc(100vh - 175px);min-height:380px}.live-terminal{padding:18px;font-size:12px}.live-terminal-bar b{font-size:11px}.live-terminal-bar em{display:none}}
.captcha-row{display:flex;gap:8px;align-items:center;margin-top:6px}.captcha-row input{margin:0;min-width:0}.captcha-image{width:132px;height:44px;border:1px solid #307842;flex:none;cursor:pointer}.refresh-captcha{width:38px;height:44px;border:1px solid #307842;background:#07170b;color:var(--green);font:20px Consolas,monospace;cursor:pointer}.refresh-captcha:hover{background:#12371a}
.auth-tabs-panel{display:block}.auth-tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:20px}.auth-tab{flex:1;padding:13px 8px;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--dim);font:14px Consolas,"Microsoft YaHei",monospace;cursor:pointer}.auth-tab:hover,.auth-tab.active{color:var(--green);border-bottom-color:var(--green);background:rgba(17,59,28,.32)}.auth-tabs-panel .panel{min-height:390px}.auth-form[hidden]{display:none}