:root{--ink:#151a1e;--panel:#fff;--canvas:#f2f3f1;--muted:#697078;--line:#dfe2df;--amber:#e59b27;--amber-dark:#b66b0d;--green:#23815b;--red:#c64b45;--blue:#296b89;--radius:18px;--shadow:0 12px 32px rgba(20,25,28,.08)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--canvas)}body{min-height:100vh}button,input,select,textarea{font:inherit}button{cursor:pointer}.hidden{display:none!important}.eyebrow{margin:0 0 10px;font-size:11px;letter-spacing:.18em;color:#d6a44e;font-weight:800}.eyebrow.dark{color:#8a6a35}.login-view{min-height:100vh;display:grid;grid-template-columns:minmax(440px,1.25fr) minmax(380px,.75fr);background:#eceeeb}.login-aside{position:relative;overflow:hidden;padding:64px 8vw;display:flex;flex-direction:column;justify-content:space-between;color:#fff;background:radial-gradient(circle at 75% 35%,#3c4549 0,transparent 34%),linear-gradient(135deg,#101417 0,#242b2f 68%,#171c1f 100%)}.login-aside:after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 60%,rgba(229,155,39,.12) 60.2%,transparent 60.6%)}.brand-mark{width:58px;height:58px;border:2px solid 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18px;display:flex;flex-direction:column;z-index:20}.side-brand{display:flex;align-items:center;gap:12px;padding:0 8px 28px;border-bottom:1px solid #31383c}.side-brand div{display:grid}.side-brand b{font-size:15px}.side-brand small{color:#899093;margin-top:3px}.sidebar nav{display:grid;gap:6px;padding:24px 0;overflow:auto}.nav-item{border:0;background:transparent;color:#aeb4b5;text-align:left;padding:12px 14px;border-radius:8px;font-weight:700;display:flex;align-items:center;gap:12px}.nav-item .nav-icon{width:22px;text-align:center}.nav-item.active,.nav-item:hover{background:#293034;color:#fff}.nav-item.active{box-shadow:inset 3px 0 var(--amber)}.side-user{margin-top:auto;border-top:1px solid #31383c;padding:18px 5px 0;display:grid;grid-template-columns:38px 1fr 30px;gap:10px;align-items:center}.side-user>div:nth-child(2){display:grid;min-width:0}.side-user b{font-size:13px;overflow:hidden;text-overflow:ellipsis}.side-user small{color:#858d90;font-size:11px;margin-top:3px}.side-user button{border:0;background:transparent;color:#909799;font-size:19px}.avatar{height:38px;border-radius:50%;display:grid;place-items:center;background:var(--amber);color:#171717;font-weight:900}.main{margin-left:252px;min-height:100vh}.topbar{height:105px;padding:24px clamp(22px,4vw,54px);background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}.topbar h2{margin:0;font-size:24px}.top-actions{display:flex;align-items:center;gap:12px}.icon-btn{border:1px solid var(--line);background:#fff;border-radius:8px;width:40px;height:40px;font-size:18px}.topbar>#menuBtn{display:none}.content{padding:32px clamp(22px,4vw,54px) 70px;max-width:1440px;margin:auto}.hero{background:linear-gradient(120deg,#1b2125,#343d42);color:#fff;border-radius:var(--radius);padding:34px 38px;position:relative;overflow:hidden;display:flex;justify-content:space-between;align-items:center;gap:30px}.hero:after{content:"";width:230px;height:230px;border:40px solid rgba(229,155,39,.11);border-radius:50%;position:absolute;right:-50px;top:-90px}.hero h3{font-size:30px;margin:5px 0 12px}.hero p{margin:0;color:#c4c9ca}.hero .btn{position:relative;z-index:1}.grid{display:grid;gap:18px}.grid.four{grid-template-columns:repeat(4,1fr)}.grid.three{grid-template-columns:repeat(3,1fr)}.stats-grid{margin:22px 0}.stat-card,.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 4px 16px rgba(20,25,28,.03)}.stat-card small{color:var(--muted);font-weight:700}.stat-card strong{display:block;font-size:32px;margin-top:12px;letter-spacing:-.04em}.stat-card strong span{font-size:13px;color:var(--muted);letter-spacing:0}.section-head{display:flex;align-items:center;justify-content:space-between;margin:30px 0 14px}.section-head 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var(--line);border-radius:12px}.data-table{width:100%;border-collapse:collapse;min-width:760px}.data-table th,.data-table td{padding:13px 15px;border-bottom:1px solid #eceeec;text-align:left;font-size:13px;vertical-align:top}.data-table th{font-size:11px;letter-spacing:.06em;color:#737a7d;background:#f8f9f7;position:sticky;top:0}.empty{text-align:center;padding:70px 20px;color:var(--muted)}.empty .empty-icon{font-size:38px;opacity:.45}.practice-layout,.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px}.question-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;min-height:480px}.question-meta{display:flex;gap:8px;align-items:center;margin-bottom:20px}.question-title{font-size:19px;line-height:1.75;margin:0 0 22px;white-space:pre-wrap}.options{display:grid;gap:12px}.option{border:1.5px solid var(--line);border-radius:11px;padding:14px 15px;display:grid;grid-template-columns:30px 1fr;gap:10px;align-items:start;background:#fff;text-align:left;width:100%;line-height:1.5}.option:hover{border-color:#b8a27d}.option.selected{border-color:var(--amber);background:#fff9ed}.option.correct{border-color:var(--green);background:#edf9f4}.option.wrong{border-color:var(--red);background:#fff1f0}.option-letter{width:26px;height:26px;border-radius:6px;background:#ecefed;display:grid;place-items:center;font-size:12px;font-weight:900}.option.selected .option-letter{background:var(--amber)}.analysis-box{margin-top:20px;padding:18px;border-radius:10px;border-left:4px solid var(--amber);background:#f7f7f4;line-height:1.7;font-size:14px}.analysis-box.correct{border-color:var(--green)}.analysis-box.wrong{border-color:var(--red)}.question-actions{display:flex;justify-content:space-between;gap:10px;margin-top:25px}.side-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;height:max-content;position:sticky;top:126px}.progress-bar{height:7px;border-radius:9px;background:#e8eae8;overflow:hidden;margin:12px 0}.progress-bar span{display:block;height:100%;background:var(--amber)}.q-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-top:16px}.q-dot{border:1px solid var(--line);background:#fff;border-radius:6px;height:34px;font-size:11px}.q-dot.done{background:#e3eee9;border-color:#9bc3b1}.q-dot.current{background:var(--amber);border-color:var(--amber)}.timer{font-size:28px;font-weight:900;letter-spacing:.04em}.timer.danger{color:var(--red)}.result-score{text-align:center;padding:30px}.result-score strong{font-size:64px;letter-spacing:-.06em}.result-score p{color:var(--muted)}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:20px;overflow:auto}.tab{border:0;background:transparent;padding:12px 17px;font-weight:800;color:var(--muted);border-bottom:3px solid transparent;white-space:nowrap}.tab.active{color:var(--ink);border-color:var(--amber)}.modal-shell{position:fixed;inset:0;background:rgba(7,10,12,.65);z-index:100;display:grid;place-items:center;padding:20px}.modal{width:min(680px,100%);max-height:90vh;overflow:auto;background:#fff;border-radius:14px;padding:26px;box-shadow:0 30px 80px rgba(0,0,0,.3)}.modal h3{margin:0 0 22px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-grid .full{grid-column:1/-1}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.toast{position:fixed;top:20px;left:50%;transform:translate(-50%,-20px);background:#20272b;color:#fff;border-radius:8px;padding:12px 18px;opacity:0;pointer-events:none;transition:.25s;z-index:200;box-shadow:var(--shadow);font-size:13px}.toast.show{opacity:1;transform:translate(-50%,0)}.toast.error{background:#9e3833}.bottom-nav{display:none}
@media(max-width:1050px){.grid.four{grid-template-columns:repeat(2,1fr)}.grid.three{grid-template-columns:repeat(2,1fr)}.practice-layout,.exam-layout{grid-template-columns:1fr}.side-panel{position:static}.login-view{grid-template-columns:1fr 1fr}.login-aside{padding:50px}.login-card{margin:35px}}
@media(max-width:760px){.login-view{display:block;background:#fff}.login-aside{min-height:240px;padding:30px 25px;justify-content:flex-end}.login-aside>.brand-mark,.steel-lines{display:none}.login-aside h1{font-size:35px;margin-bottom:12px}.login-lead{font-size:13px;margin-bottom:0}.login-card{margin:-18px 15px 30px;position:relative;padding:26px 22px;border-radius:14px;border-top-width:4px}.mobile-brand{display:none}.sidebar{transform:translateX(-100%);transition:.25s;box-shadow:20px 0 50px rgba(0,0,0,.18)}.sidebar.open{transform:translateX(0)}.main{margin:0}.topbar{height:86px;padding:16px 18px}.topbar>#menuBtn{display:block}.topbar>div:nth-child(2){margin-right:auto;margin-left:12px}.topbar h2{font-size:20px}.topbar .eyebrow{display:none}.top-actions #jobBadge{display:none}.content{padding:20px 15px 90px}.hero{padding:25px;display:block}.hero h3{font-size:24px}.hero .btn{margin-top:22px}.grid.four,.grid.three{grid-template-columns:1fr 1fr;gap:11px}.stat-card,.card{padding:17px;border-radius:13px}.stat-card strong{font-size:26px}.action-card{min-height:170px}.action-card h3{font-size:15px}.action-card p{font-size:12px}.action-card .btn{width:100%;font-size:12px}.question-card{padding:20px 17px;min-height:auto}.question-title{font-size:17px}.question-actions{position:sticky;bottom:70px;background:#fff;padding:10px 0}.side-panel{border-radius:13px}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;height:66px;padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line);z-index:18;justify-content:space-around}.bottom-nav .nav-item{color:#6c7477;display:grid;place-items:center;gap:2px;font-size:10px;padding:6px;background:transparent;box-shadow:none}.bottom-nav .nav-item.active{color:var(--amber-dark)}.bottom-nav .nav-icon{font-size:19px}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.modal{padding:20px}.q-grid{grid-template-columns:repeat(8,1fr)}.q-dot{height:30px}.toolbar>*{width:100%}.toolbar input{min-width:0}}
@media(max-width:430px){.grid.three,.grid.four{grid-template-columns:1fr}.stats-grid.grid.four{grid-template-columns:1fr 1fr}.stat-card{padding:15px}.login-aside h1{font-size:30px}.q-grid{grid-template-columns:repeat(6,1fr)}}
@media(min-width:761px){.login-aside h1{font-size:clamp(40px,4.4vw,58px)}}