*{box-sizing:border-box}body{margin:0;font-family:Microsoft YaHei,PingFang SC,Arial,sans-serif;color:#292929;background:#eef0fb}button,input,select{font:inherit}button{border:0;cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}input,select{width:100%;border:1px solid #e7eaf3;border-radius:4px;padding:9px 12px;margin-top:6px;background:#fff}input[type=checkbox]{width:auto;margin:0 6px 0 0}label{display:block;color:#4d5360;font-size:14px}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(120deg,#5ccdbd,#75a8fb)}.login-box{width:min(460px,92vw);background:#fff;padding:34px;border-radius:4px;display:grid;gap:16px;box-shadow:0 24px 90px #2c588033}.login-box h1{margin:0;font-size:26px;color:#5dcfc1;font-weight:500}.login-box button{height:46px;border-radius:4px;color:#fff;background:linear-gradient(90deg,#62cdc0,#75a8fb);font-size:18px}.login-mark{display:flex;align-items:center;gap:18px}.message{min-height:20px;color:#5dc6bd}.ikao-shell{min-height:100vh;display:grid;grid-template-columns:226px 1fr}.ikao-shell.answering{grid-template-columns:1fr}.vehicle-rail{background:#fff;padding-top:82px;border-right:1px solid #eef0f5}.vehicle-rail button{width:100%;height:136px;display:grid;place-items:center;align-content:center;gap:12px;background:#fff;color:#c2c5cc;font-size:18px}.vehicle-rail button.active{background:#5dcdbc;color:#fff}.vehicle-rail button.muted:not(.active){color:#c6c9d0}.vehicle-rail b{font-weight:400}.vehicle-icon{position:relative;display:block;width:70px;height:50px;color:currentColor}.vehicle-icon:before,.vehicle-icon:after{content:"";position:absolute;border:4px solid currentColor}.vehicle-icon.car:before{top:17px;right:5px;bottom:8px;left:5px;border-radius:8px 16px 8px 8px}.vehicle-icon.car:after{left:13px;right:13px;bottom:0;height:12px;border-width:0 9px 0 9px;border-radius:99px}.vehicle-icon.bus:before{top:8px;right:4px;bottom:8px;left:4px;border-radius:5px}.vehicle-icon.bus:after{left:12px;right:12px;bottom:0;height:11px;border-width:0 8px 0 8px;border-radius:99px}.vehicle-icon.truck:before{left:2px;top:12px;width:42px;height:28px;border-radius:4px}.vehicle-icon.truck:after{right:0;top:22px;width:22px;height:18px;border-radius:4px}.vehicle-icon.moto:before{left:2px;right:2px;bottom:4px;height:12px;border-radius:99px;border-top:0}.vehicle-icon.moto:after{left:25px;top:8px;width:27px;height:18px;border-left:0;border-bottom:0;transform:rotate(-18deg)}.vehicle-icon.code:before{top:6px;right:4px;bottom:6px;left:4px;border-radius:4px}.vehicle-icon.code:after{left:22px;top:18px;width:26px;height:16px;border-top:0;border-bottom:0;transform:skew(-18deg)}.vehicle-icon.drone:before{top:14px;right:23px;bottom:14px;left:23px;border-radius:8px}.vehicle-icon.drone:after{top:4px;right:4px;bottom:4px;left:4px;border-radius:18px}.ikao-main{min-width:0;background:#eef0fb}.ikao-header{height:82px;background:linear-gradient(90deg,#5dcdbc,#75a6fb);display:flex;align-items:center;justify-content:space-between;padding:0 28px 0 64px;color:#fff}.header-brand{display:flex;align-items:center;gap:34px}.header-brand strong{font-size:34px;font-weight:400;letter-spacing:0}.header-back{width:82px;height:34px;border-radius:4px;border:1px solid rgba(255,255,255,.9);background:#ffffff14;color:#fff;font-size:18px;position:relative;padding-left:20px}.header-back:before{content:"";position:absolute;left:15px;top:11px;width:9px;height:9px;border-left:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg)}.book-logo{width:86px;height:62px;display:inline-block;position:relative}.book-logo:before{content:"";position:absolute;left:13px;top:5px;width:50px;height:44px;border:6px solid currentColor;border-radius:50% 50% 45% 45%;color:#fff}.book-logo:after{content:"";position:absolute;left:0;right:0;bottom:2px;height:20px;border-top:6px solid currentColor;border-radius:50%;color:#fff}.student-code{display:flex;align-items:center;gap:36px;font-size:20px}.student-code button{min-width:74px;height:32px;border-radius:3px;background:#fff;color:#6e9af2;font-size:14px}.notice{position:fixed;top:96px;left:50%;transform:translate(-50%);z-index:40;min-width:220px;text-align:center;background:#fff;color:#5ec6bd;border:1px solid #d9f4f0;padding:9px 18px;border-radius:4px;box-shadow:0 8px 24px #5064821f}.ikao-home{padding:44px 46px 56px}.subject-card{background:#fff;min-height:570px;padding:23px 33px 44px}.subject-tabs{height:73px;border-bottom:1px solid #eff1f5;display:grid;grid-template-columns:repeat(4,minmax(180px,244px));justify-content:space-between;align-items:start;gap:20px}.subject-tabs button{height:50px;border-radius:4px;border:1px solid #8ce1d7;background:#fff;color:#5dcdbc;font-size:29px;font-weight:700}.subject-tabs button.active{background:#5dcdbc;color:#fff}.practice-columns{display:grid;grid-template-columns:repeat(3,minmax(250px,350px));justify-content:space-between;gap:48px;padding-top:36px}.practice-column{display:grid;gap:13px;align-content:start}.set-button{height:52px;border-radius:4px;color:#fff;font-size:24px;font-weight:400;display:grid;place-items:center;line-height:1.08;padding:4px 10px}.set-button span,.set-button small{min-width:0;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.set-button small{font-size:12px;opacity:.88}.set-button:disabled{opacity:.45;cursor:not-allowed}.set-button.required{background:#f06464}.set-button.boost{background:#f7bf58}.set-button.optional{background:#75a0ee}.function-grid{position:relative;display:grid;grid-template-columns:minmax(420px,1fr) 300px minmax(420px,1fr);grid-template-rows:114px 114px;column-gap:18px;row-gap:22px;margin-top:34px}.record-pair,.record-card,.paper-actions,.preference-bar{height:114px;background:#fff;border-radius:4px}.record-pair{grid-column:1;grid-row:1;display:grid;grid-template-columns:1fr 1fr}.record-card{display:flex;align-items:center;gap:26px;padding:0 26px;color:#20222a;font-size:24px}.record-pair .record-card{height:100%;border-radius:0;background:transparent}.record-pair .record-card:first-child{border-right:1px solid #eef1f5}.record-pair .record-card:first-child{border-top-left-radius:4px;border-bottom-left-radius:4px}.record-pair .record-card:last-child{border-top-right-radius:4px;border-bottom-right-radius:4px}.favorite-card{grid-column:1;grid-row:2}.record-card b{font-weight:700}.record-card i{width:12px;height:12px;border-right:2px solid #babdc5;border-top:2px solid #babdc5;transform:rotate(45deg);margin-left:auto}.round-icon{width:54px;height:54px;border-radius:50%;display:inline-block;position:relative}.round-icon.wrong{background:#ffe8e1}.round-icon.score{background:#dcfae9}.round-icon.fav{background:#e5edff}.round-icon:after{content:"";position:absolute;top:14px;right:14px;bottom:14px;left:14px;border:4px solid currentColor;border-radius:4px}.round-icon.wrong{color:#f28b75}.round-icon.score{color:#58c987}.round-icon.fav{color:#5d80e8}.mock-hub{grid-row:1 / span 2;grid-column:2;display:grid;place-items:center;position:relative;z-index:1;pointer-events:none}.mock-hub:before{content:"";position:absolute;width:218px;height:218px;border-radius:50%;background:radial-gradient(circle,#5dcdbc 0,#5dcdbc 45%,#6ea4ef 46%,#6ea4ef 61%,#dfe7fb 62%,#dfe7fb);opacity:.95}.mock-hub button{position:relative;width:150px;height:150px;border-radius:50%;color:#fff;background:linear-gradient(135deg,#5dcdbc,#6e9df2);font-size:29px;font-weight:700;pointer-events:auto}.paper-actions{grid-column:3;grid-row:1;display:flex;align-items:center;justify-content:space-around;gap:22px;padding:0 42px;position:relative;z-index:2}.paper-actions button{width:146px;height:52px;border-radius:4px;background:#fff;border:1px solid #eceff6;color:#1f2028;font-size:21px;font-weight:700}.paper-actions button.active{background:#5dcdbc;color:#fff;border-color:#5dcdbc}.preference-bar{grid-column:3;grid-row:2;display:flex;align-items:center;justify-content:space-evenly;gap:10px;padding:0 18px;overflow:visible;position:relative;z-index:2}.preference-bar label{display:flex;align-items:center;gap:8px;color:#22252c;font-size:18px;font-weight:700;white-space:nowrap;flex:0 1 auto;min-width:0}.preference-bar select{width:82px;height:34px;margin:0;padding:0 22px 0 12px;border:1px solid #dfe5ef;border-radius:4px;color:#6c717d;font-size:16px;font-weight:400;line-height:34px;background-color:#fff}.preference-bar label:nth-child(2) select{width:86px}.preference-bar label:last-child select{width:112px}.record-page{width:min(1380px,calc(100vw - 80px));margin:36px auto 80px;background:#fff;padding:28px 34px;min-height:620px}.record-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #eef1f5;padding-bottom:18px;margin-bottom:22px}.record-head h2{margin:0;color:#22252c;font-size:28px}.record-head>div{display:flex;gap:12px}.record-head button{width:112px;height:40px;border-radius:4px;background:#5dcdbc;color:#fff}.record-head button.danger{background:#e76565}.empty-record{height:220px;display:grid;place-items:center;color:#9299a7;font-size:22px}.wrong-item{border-bottom:1px solid #eef1f5;padding:18px 0}.wrong-item h3{margin:0 0 12px;font-size:24px;line-height:1.5;font-weight:400}.wrong-options{display:grid;gap:8px;margin:8px 0 12px}.wrong-option{color:#333843;font-size:18px;line-height:1.5}.wrong-option img{max-width:360px;max-height:160px;display:block;object-fit:contain;margin:8px 0 0 28px}.wrong-item img{max-width:420px;max-height:220px;display:block;object-fit:contain;margin:0 0 12px;border:1px solid #e5e9f2}.wrong-item .wrong-option img{max-width:360px;max-height:160px;margin:8px 0 0 28px}.wrong-item p{margin:8px 0;color:#555c68;font-size:17px;line-height:1.6}.score-table{width:100%;border-collapse:collapse;font-size:18px}.score-table th,.score-table td{border-bottom:1px solid #eef1f5;padding:16px 12px;text-align:left}.score-table th{background:#f7f9fd;color:#596272}.wrong-batch-table th,.wrong-batch-table td{font-size:14px}.table-action{min-width:74px;height:30px;margin-right:10px;border-radius:4px;color:#fff;font-size:14px}.table-action.primary{background:#5a9cf2}.table-action.danger{background:#e76565}.exam-stage{width:min(1540px,calc(100vw - 72px));margin:20px auto 0;display:grid;grid-template-columns:260px minmax(520px,1fr) 444px;grid-template-rows:auto auto;gap:0 14px;background:#fff}.candidate-panel{display:grid;gap:12px;align-content:start;padding:0}.candidate-panel fieldset{margin:0;border:1px solid #b8bbc4;color:#222;background:#fff}.candidate-panel legend{padding:0 12px;color:#568bd4;font-size:19px}.station-box{height:82px;display:grid;place-items:center;font-size:22px}.avatar-box{height:96px;border:1px solid #b8bbc4;display:grid;place-items:center;background:#fff}.candidate-avatar{width:58px;height:58px;border-radius:50%;background:radial-gradient(circle at 50% 32%,#744832 0 14%,transparent 15%),radial-gradient(circle at 50% 41%,#f0b18a 0 22%,transparent 23%),linear-gradient(#477f87 0,#477f87 0) center bottom / 44px 25px no-repeat,#f68d83;display:block}.candidate-info{min-height:200px;padding:46px 18px 14px;font-size:18px}.candidate-info p{margin:0 0 14px}.time-box{height:80px;display:grid;place-items:center}.time-box strong{font-size:34px;font-weight:400}.exam-paper{min-height:460px;border:1px solid #c6c8cf;background:#fff;padding:24px 28px 14px}.question-copy{line-height:1.5;font-weight:400;margin-bottom:16px}.question-image{display:block;max-width:min(520px,100%);max-height:260px;object-fit:contain;margin:0 auto;background:#fff}.exam-options{display:grid;gap:10px;align-content:start}.exam-option-line{min-height:40px;text-align:left;background:transparent;color:inherit;border-radius:0;padding:0;font-size:34px;display:grid;gap:8px}.exam-options img{max-width:360px;max-height:170px;object-fit:contain;border:1px solid #e5e9f2;background:#f7f9fd}.inline-tip{margin-top:20px;line-height:1.45;white-space:pre-line}.inline-tip span{color:#55bb4d}.inline-tip b{color:#f23b32;font-weight:400}.answer-choice{margin-top:28px;display:grid;grid-template-columns:minmax(220px,1fr) auto auto;align-items:center;column-gap:16px;min-height:76px}.answer-choice strong{font-size:18px}.answer-buttons{display:flex;align-items:center;justify-content:center;gap:10px;padding-right:10px}.answer-buttons button{width:64px;height:60px;background:#fff;border:1px solid #edf0f6;color:#6c717d;border-radius:0;font-size:38px;line-height:1}.answer-buttons.judge button{width:58px}.answer-buttons button:disabled{cursor:default}.answer-buttons.judge{gap:18px}.answer-buttons.judge button{width:58px;font-size:42px}.answer-buttons button.chosen{border-color:#75a0ee;color:#5d8ee8;background:#f4f8ff}.confirm-answer{width:82px;height:42px;border-radius:3px;color:#fff;background:#75a8fb;font-size:18px}.answer-result{margin-top:10px;min-height:30px;color:#f23b32;font-size:18px}.answer-result.right{color:#42a95c}.answer-result p{margin:6px 0 0}.exam-card-panel{min-height:460px;border:1px solid #c6c8cf;background:#fff;padding:0}.answer-grid{display:grid;grid-template-columns:44px repeat(10,40px);grid-auto-rows:34px;align-content:start;overflow:hidden}.answer-grid div,.answer-grid button{border:0;border-right:1px solid #c9ccd4;border-bottom:1px solid #c9ccd4;display:grid;place-items:center;font-size:16px;background:#fff;color:#222;border-radius:0;padding:0}.answer-grid .grid-head,.answer-grid .grid-row-head{background:#75a0ee;color:#172033;font-weight:700}.answer-grid button.current{background:#668edc;color:#fff}.answer-grid button.correct,.answer-grid button.answered{background:#dff7eb;color:#20845f}.answer-grid button.wrong{background:#ffe2e2;color:#c64b4b}.answer-grid button.disabled{color:#222;background:#fff;cursor:default}.answer-grid .card-empty{color:transparent;background:#fff}.random-mode{float:right;margin:8px 0 0;width:78px;height:34px;background:#5f86ce;color:#fff;border-radius:4px}.exam-toolbar{grid-column:1 / -1;min-height:72px;border-top:1px solid #5b86cb;border-bottom:1px solid #5b86cb;background:#fff;display:flex;align-items:center;gap:8px;flex-wrap:nowrap;padding:8px 20px}.exam-toolbar strong{min-width:150px;font-size:23px;font-weight:500}.exam-toolbar label{display:inline-flex;align-items:center;color:#6b7280;font-size:14px;white-space:nowrap}.exam-toolbar button{min-width:52px;height:28px;border-radius:3px;color:#fff;font-size:13px}.exam-toolbar .mini.blue{background:#5fa7f7}.exam-toolbar .mini.green{background:#62c66f}.exam-toolbar .mini.orange{background:#e7a33f}.exam-toolbar .collect{background:#fff;color:#333843;border:1px solid #edf1f7;min-width:72px}.exam-toolbar .prev,.exam-toolbar .next,.exam-toolbar .end{min-width:104px;height:48px;background:#fff;color:#333843;border:1px solid #edf1f7;font-size:22px}.exam-toolbar .prev{margin-left:auto}.exam-toolbar .next,.exam-toolbar .end{margin-left:0}.question-media-panel{grid-column:1 / -1;min-height:220px;background:#fff;display:flex;justify-content:center;align-items:flex-start;margin:0;padding:12px 0 18px}.question-media-panel .question-image{max-width:min(620px,100%);max-height:280px;margin:0 auto;border:0;background:transparent}.start-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000007a;display:grid;place-items:center;z-index:50}.start-dialog{width:432px;min-height:206px;background:#fff;border-radius:4px;text-align:center;padding:28px 34px;box-shadow:0 18px 60px #0000002e}.start-dialog h2{margin:0 0 22px;color:#f24d44;font-size:28px}.start-dialog p{margin:0 0 34px;color:#646a75;font-size:14px}.start-dialog div{display:flex;justify-content:center;gap:12px}.start-dialog button{width:58px;height:32px;border-radius:3px;background:#75a8fb;color:#fff}.start-dialog .cancel{background:#fff;color:#5f6672;border:1px solid #edf0f5}.tip-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000005c;display:grid;place-items:center;z-index:60}.tip-dialog{width:min(560px,calc(100vw - 48px));min-height:210px;background:#fff;border-radius:4px;box-shadow:0 18px 60px #0003;overflow:hidden}.tip-dialog header{height:58px;background:linear-gradient(90deg,#62cbbd,#78a3f2);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 20px 0 26px}.tip-dialog h2{margin:0;font-size:24px;font-weight:600}.tip-dialog header button{width:34px;height:34px;border-radius:3px;background:#ffffff2e;color:#fff;font-size:26px;line-height:1}.tip-content,.tip-loading,.tip-error{padding:28px 32px 30px;color:#252a33;font-size:22px;line-height:1.75}.tip-content p{margin:0 0 18px}.tip-content small{color:#7a8393;font-size:14px}.tip-error{color:#d85050}@media(max-width:1180px){.ikao-shell{grid-template-columns:150px 1fr}.ikao-shell.answering{grid-template-columns:1fr}.vehicle-rail button{height:112px}.practice-columns{grid-template-columns:1fr;gap:16px}.subject-tabs{grid-template-columns:repeat(2,1fr);height:auto;padding-bottom:20px}.function-grid{grid-template-columns:1fr}.record-pair,.favorite-card,.paper-actions,.preference-bar,.mock-hub{grid-column:1;grid-row:auto}.mock-hub{grid-column:auto;grid-row:auto;height:240px}.preference-bar,.paper-actions{flex-wrap:wrap;height:auto;min-height:114px;justify-content:center;padding:20px}.exam-stage{width:calc(100vw - 24px);grid-template-columns:1fr}.exam-toolbar{grid-column:1}.answer-grid{grid-template-columns:44px repeat(10,minmax(28px,1fr))}}@media(max-width:720px){.ikao-shell{grid-template-columns:1fr}.vehicle-rail{display:grid;grid-template-columns:repeat(3,1fr);padding-top:0}.vehicle-rail button{height:92px}.ikao-header{padding:0 16px}.header-brand strong{font-size:22px}.book-logo{width:58px;height:44px}.ikao-home{padding:20px 12px 50px}.record-page{width:calc(100vw - 24px);padding:20px 14px}.subject-card{padding:18px 14px 36px}.set-button{font-size:20px}}