:root{--brand-1: #0ea5e9;--brand-2: #10b981;--accent: #6366f1;--bg: #f8fafc;--panel: #ffffff;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--ok: #10b981;--err: #ef4444;--warn: #f59e0b}*{box-sizing:border-box}html,body{min-height:100%}#root{min-height:100vh}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:20px;padding:14px 28px;background:#ffffffd9;backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border)}.brand-link{display:flex;align-items:center;gap:10px}.brand-link,.brand-link:hover{text-decoration:none;color:inherit}.brand{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:18px}.brand-emoji{font-size:22px}.brand-cn{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}.brand-dot{color:var(--muted)}.brand-en{font-size:14px;color:var(--muted);letter-spacing:1px}.brand-en .brand-oj{color:var(--accent);font-weight:900;margin-left:2px}.nav-links{display:flex;align-items:center;gap:4px;margin-left:18px;padding:4px;background:#f8fafdb3;border:1px solid var(--border);border-radius:12px}.nav-link{position:relative;display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--muted);text-decoration:none;transition:color .15s ease,background .15s ease,transform .12s ease}.nav-link:hover{color:var(--brand-1);background:#0ea5e91a;text-decoration:none}.nav-link.active{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;box-shadow:0 4px 10px #0ea5e947}.nav-link.active:hover{color:#fff}.nav-link .ni-icon{font-size:14px;display:inline-flex;align-items:center;transform:translateY(-.5px)}.spacer{flex:1}.user-chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px 4px 4px;border-radius:999px;background:#f1f5f9;font-size:13px}.user-avatar{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}.user-name{font-weight:600}.user-role{font-size:11px;padding:2px 8px;border-radius:999px;color:#fff}.role-admin{background:var(--accent)}.role-user{background:#94a3b8}button{border:none;cursor:pointer;font:inherit;padding:8px 16px;border-radius:8px;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;font-weight:600;transition:transform .15s,box-shadow .15s,filter .15s}button:hover{transform:translateY(-1px);box-shadow:0 6px 18px #0ea5e94d;filter:brightness(1.05)}button:disabled{opacity:.5;cursor:not-allowed;transform:none}button.ghost{background:transparent;color:var(--text);border:1px solid var(--border);box-shadow:none}button.ghost:hover{background:#f1f5f9;box-shadow:none}button.danger{background:linear-gradient(135deg,#ef4444,#f97316)}input,textarea,select{font:inherit;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:#fff;color:var(--text);width:100%}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--brand-1);box-shadow:0 0 0 3px #0ea5e926}label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px;font-weight:600}.container{max-width:1200px;margin:0 auto;padding:24px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 2px 8px #0f172a0a}h1,h2,h3{margin:0 0 12px}h1{font-size:26px}h2{font-size:20px}h3{font-size:16px}.row{display:flex;gap:10px;align-items:center}.col{display:flex;flex-direction:column;gap:10px}.grow{flex:1}table{width:100%;border-collapse:collapse}th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border);font-size:14px}th{font-weight:700;color:var(--muted);background:#f8fafc;font-size:12px;text-transform:uppercase;letter-spacing:.5px}tr:hover td{background:#f8fafc}.tag{display:inline-block;font-size:12px;padding:2px 10px;border-radius:999px;background:#ecfeff;color:#0e7490;font-weight:600}.tag.green{background:#ecfdf5;color:#047857}.tag.indigo{background:#eef2ff;color:#4338ca}.tag.amber{background:#fffbeb;color:#b45309}.tag.gray{background:#f1f5f9;color:#475569}.qtype-choice{color:var(--brand-1)}.qtype-judge{color:var(--brand-2)}.qtype-fill{color:var(--accent)}.qtype-essay{color:var(--warn)}.md{line-height:1.75;word-break:break-word}.md img{max-width:100%;height:auto;display:block;margin:8px 0;border-radius:8px;box-shadow:0 2px 8px #0f172a14}.md pre{background:#0f172a;color:#e2e8f0;padding:12px;border-radius:8px;overflow-x:auto}.md code{background:#f1f5f9;padding:1px 6px;border-radius:4px}.md pre code{background:transparent;padding:0}.option{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;border:1px solid var(--border);border-radius:10px;margin-bottom:8px;cursor:pointer;transition:border-color .15s,background .15s}.option:hover{border-color:var(--brand-1);background:#f0f9ff}.option.selected{border-color:var(--brand-1);background:#e0f2fe}.option input{width:auto;margin-top:4px}.option .opt-key{font-weight:800;color:var(--accent);min-width:22px}.q-card{border-left:4px solid var(--brand-1)}.q-card.judge{border-left-color:var(--brand-2)}.q-card.fill{border-left-color:var(--accent)}.q-card.essay{border-left-color:var(--warn)}.timer{font-family:Courier New,monospace;font-size:20px;font-weight:900;padding:6px 14px;border-radius:10px;background:linear-gradient(135deg,var(--brand-1),var(--accent));color:#fff}.timer.urgent{background:linear-gradient(135deg,#f97316,#ef4444)}.q-nav{display:flex;flex-wrap:wrap;gap:8px}.q-nav button{width:38px;height:38px;padding:0;border-radius:8px;background:#fff;color:#334155;border:1px solid var(--border);font-weight:700}.q-nav button:hover{border-color:var(--brand-1);box-shadow:none}.q-nav button.answered{background:#ecfeff;color:var(--brand-1);border-color:#67e8f9}.q-nav button.current{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;border:none}.banner-ok{background:#ecfdf5;color:#047857;border:1px solid #6ee7b7;padding:12px 16px;border-radius:10px}.banner-err{background:#fef2f2;color:#b91c1c;border:1px solid #fca5a5;padding:12px 16px;border-radius:10px}.banner-info{background:#eff6ff;color:#1e40af;border:1px solid #93c5fd;padding:12px 16px;border-radius:10px}.score-pill{display:inline-block;padding:4px 14px;border-radius:999px;font-weight:800;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff}.score-pill.partial{background:linear-gradient(135deg,var(--warn),#fb923c)}.score-pill.zero{background:#cbd5e1;color:#475569}.editor-wrap{display:flex;flex-direction:column;gap:6px}.editor-toolbar{display:flex;gap:6px;flex-wrap:wrap}.editor-toolbar button{padding:4px 10px;font-size:12px;background:#f1f5f9;color:#334155;box-shadow:none;border:1px solid var(--border)}.editor-toolbar button:hover{background:#e2e8f0;box-shadow:none;transform:none}.editor-textarea{min-height:120px;font-family:Consolas,monospace;font-size:13px}.editor-preview{border:1px dashed var(--border);border-radius:8px;padding:12px;background:#fafafa;min-height:60px}.editor-hint{font-size:12px;color:var(--muted)}.split{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media (max-width: 900px){.split{grid-template-columns:1fr}}@media (max-width: 760px){.nav{gap:10px;padding:12px 14px;flex-wrap:wrap}.nav-links{margin-left:0;order:10;flex-basis:100%;overflow-x:auto}.nav-link{padding:6px 10px}.nav-link .ni-icon{display:none}}.list-card{display:flex;align-items:center;gap:16px;padding:16px 20px;border:1px solid var(--border);border-radius:12px;background:#fff;margin-bottom:10px;transition:transform .15s,box-shadow .15s,border-color .15s}.list-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px #0f172a14;border-color:var(--brand-1)}.list-card .lc-title{font-size:17px;font-weight:700}.list-card .lc-meta{font-size:13px;color:var(--muted);margin-top:4px}.think-home{display:flex;flex-direction:column;gap:18px}.think-hero{display:grid;grid-template-columns:minmax(0,.95fr) minmax(420px,1.05fr);gap:30px;align-items:center;min-height:430px;padding:34px;border:1px solid #cfe8f6;border-radius:18px;background:linear-gradient(90deg,rgba(14,165,233,.08) 1px,transparent 1px),linear-gradient(0deg,rgba(14,165,233,.08) 1px,transparent 1px),linear-gradient(135deg,#f7fcff,#ecfdf5);background-size:36px 36px,36px 36px,auto;box-shadow:0 22px 55px #0ea5e91f}.think-hero-copy{min-width:0}.think-kicker,.think-panel-head span{color:#047857;font-size:12px;font-weight:900;letter-spacing:1.7px;text-transform:uppercase}.think-hero h1{max-width:650px;margin:14px 0;font-size:42px;line-height:1.14;letter-spacing:0;color:#0b172a}.think-hero p{max-width:590px;margin:0;color:#526175;font-size:16px;line-height:1.8}.think-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.think-primary-action,.think-secondary-action{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 18px;border-radius:10px;font-weight:800;transition:transform .15s ease,box-shadow .15s ease,background .15s ease,border-color .15s ease}.think-primary-action{color:#fff;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));box-shadow:0 12px 24px #0ea5e938}.think-primary-action:hover{color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:0 16px 30px #0ea5e947}.think-secondary-action{color:#0f172a;background:#ffffffc7;border:1px solid #cfe8f6}.think-secondary-action:hover{color:var(--brand-1);text-decoration:none;background:#fff;border-color:#8bd3f7}.think-stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:28px;max-width:520px}.think-stat-grid div{padding:14px;border:1px solid rgba(14,165,233,.18);border-radius:12px;background:#ffffffbd}.think-stat-grid strong{display:block;color:#0f172a;font-size:25px;line-height:1}.think-stat-grid span{display:block;margin-top:5px;color:var(--muted);font-size:12px;font-weight:800}.think-preview{min-width:0;border:1px solid rgba(15,23,42,.11);border-radius:18px;background:#fff;box-shadow:0 24px 52px #0f172a24;overflow:hidden}.think-preview-top{display:flex;align-items:center;gap:8px;padding:12px 14px;background:#0f172a}.preview-tab,.preview-clock{padding:6px 10px;border-radius:8px;color:#94a3b8;font-size:12px;font-weight:800}.preview-tab.active{background:#1e293b;color:#fff}.preview-clock{margin-left:auto;color:#67e8f9;background:#0ea5e926;font-family:Courier New,monospace}.think-preview-body{display:grid;grid-template-columns:92px minmax(0,1fr);min-height:310px;background:#f8fafc}.answer-map{display:grid;grid-template-columns:repeat(2,34px);align-content:start;gap:8px;padding:18px 12px;border-right:1px solid var(--border)}.answer-map span{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;background:#fff;border:1px solid var(--border);color:var(--muted);font-weight:900;font-size:12px}.answer-map .done{background:#dcfce7;color:#047857;border-color:#86efac}.answer-map .current{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;border-color:transparent}.paper-sheet{margin:18px;padding:20px;border:1px solid var(--border);border-radius:14px;background:#fff;box-shadow:0 10px 24px #0f172a0f}.paper-type{color:var(--brand-1);font-size:12px;font-weight:900;margin-bottom:10px}.paper-sheet h3{margin:0 0 16px;color:#0f172a;font-size:17px;line-height:1.5}.choice-row{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;align-items:center;padding:11px;margin-top:8px;border:1px solid var(--border);border-radius:10px;color:#334155}.choice-row b{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:#eef2ff;color:var(--accent)}.choice-row.selected{border-color:#67e8f9;background:#ecfeff}.progress-line{height:8px;margin-top:18px;border-radius:999px;background:#e2e8f0;overflow:hidden}.progress-line i{display:block;width:64%;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--brand-1),var(--brand-2))}.think-command-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.think-command{display:grid;grid-template-columns:44px minmax(0,1fr);grid-template-rows:auto auto;column-gap:13px;row-gap:3px;align-items:center;min-height:104px;padding:18px;border:1px solid var(--border);border-radius:14px;background:#fff;color:var(--text);box-shadow:0 2px 8px #0f172a0a;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.think-command:hover{color:var(--text);text-decoration:none;transform:translateY(-2px);border-color:#8bd3f7;box-shadow:0 12px 28px #0ea5e91a}.think-command.admin{background:#0f172a;border-color:#0f172a;color:#fff}.think-command b{align-self:end;font-size:16px}.think-command em{align-self:start;color:var(--muted);font-size:13px;font-style:normal;line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.think-command.admin em{color:#cbd5e1}.think-command-mark{grid-row:span 2;width:44px;height:44px;border-radius:12px;background:#ecfeff;position:relative}.think-command-mark:before,.think-command-mark:after{content:"";position:absolute}.mark-homework:before{left:13px;top:9px;width:18px;height:26px;border-radius:4px;background:var(--brand-2);box-shadow:inset 5px 0 #ffffff61}.mark-exam:before{left:11px;top:11px;width:22px;height:22px;border-radius:50%;border:4px solid var(--accent)}.mark-bank:before{left:10px;top:12px;width:24px;height:7px;border-radius:4px;background:#67e8f9;box-shadow:0 10px #34d399,0 20px #818cf8}.mark-start:before{left:14px;top:11px;border-left:18px solid var(--brand-1);border-top:11px solid transparent;border-bottom:11px solid transparent}.think-main-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(320px,.7fr);gap:16px}.think-panel{padding:18px;border:1px solid var(--border);border-radius:14px;background:#fff;box-shadow:0 2px 8px #0f172a0a}.think-panel-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:14px}.think-panel-head h2{margin:4px 0 0;font-size:22px}.think-panel-head.compact h2{font-size:18px}.think-panel-head a{color:var(--muted);font-size:13px;font-weight:800}.think-paper-list{display:flex;flex-direction:column;gap:8px}.think-paper-item{display:grid;grid-template-columns:52px minmax(0,1fr) auto;align-items:center;gap:12px;padding:12px;border:1px solid #edf2f7;border-radius:10px;color:var(--text);transition:background .15s ease,border-color .15s ease,transform .15s ease}.think-paper-item:hover{color:var(--text);text-decoration:none;background:#f0fdfa;border-color:#99f6e4;transform:translate(2px)}.paper-kind{padding:5px 8px;border-radius:8px;background:#ecfdf5;color:#047857;font-size:12px;font-weight:900;text-align:center}.paper-kind.exam{background:#eef2ff;color:#4338ca}.paper-info{min-width:0}.paper-info b,.paper-info em{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.paper-info em{margin-top:3px;color:var(--muted);font-size:12px;font-style:normal}.paper-count{color:var(--brand-1);font-size:12px;font-weight:900}.think-type-panel{display:flex;flex-direction:column}.type-matrix{display:grid;grid-template-columns:1fr 1fr;gap:10px}.type-matrix div{min-height:82px;padding:14px;border:1px solid var(--border);border-radius:12px;background:#f8fafc}.type-matrix b{display:block;color:#0f172a;font-size:17px}.type-matrix span{display:block;margin-top:6px;color:var(--muted);font-size:12px;font-weight:700}.think-report-strip{margin-top:auto;padding:16px;border-radius:12px;background:linear-gradient(135deg,#0f172a,#155e75);color:#fff}.think-report-strip span{display:block;color:#67e8f9;font-size:12px;font-weight:900;letter-spacing:1px;text-transform:uppercase}.think-report-strip strong{display:block;margin-top:5px;font-size:15px;line-height:1.5}.think-empty{margin:0;color:var(--muted);font-size:14px}@media (max-width: 980px){.think-hero,.think-main-grid,.think-command-grid{grid-template-columns:1fr}}@media (max-width: 680px){.think-hero{padding:22px}.think-hero h1{font-size:31px}.think-stat-grid,.think-preview-body{grid-template-columns:1fr}.answer-map{grid-template-columns:repeat(6,34px);border-right:0;border-bottom:1px solid var(--border);overflow-x:auto}.think-paper-item{grid-template-columns:50px minmax(0,1fr)}.paper-count{grid-column:2}.type-matrix{grid-template-columns:1fr}}body{background:linear-gradient(90deg,rgba(14,165,233,.05) 1px,transparent 1px),linear-gradient(0deg,rgba(16,185,129,.05) 1px,transparent 1px),linear-gradient(180deg,#fbfdff,#f6fafc 54%,#f2f8f5);background-size:42px 42px,42px 42px,auto}.nav{background:#ffffffeb;box-shadow:0 8px 24px #0f172a0e}.nav-links{background:#f4f9fae6;box-shadow:inset 0 1px #fffc}.panel,.list-card,.think-panel,.think-command,table{box-shadow:0 8px 24px #0f172a0e}.panel,.list-card,.think-panel,.think-command{transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}.panel:hover,.think-panel:hover{border-color:#0ea5e938;box-shadow:0 14px 34px #0f172a14}button{box-shadow:0 8px 18px #0ea5e929}button.ghost{background:#ffffffc7;box-shadow:none}input,select,textarea{background:#fffffff0;transition:border-color .15s ease,box-shadow .15s ease,background .15s ease}th{background:#f3f8fb}tr:hover td{background:#f0fdfa}.container:has(.think-home){max-width:1240px;padding-top:22px}.think-home{gap:20px}.think-hero{position:relative;overflow:hidden;border-color:#0ea5e938;border-radius:22px;background:linear-gradient(135deg,#fffffff5,#f0fdfae0 55%,#eff6fff0),repeating-linear-gradient(0deg,rgba(14,165,233,.07) 0 1px,transparent 1px 34px);box-shadow:0 30px 70px #0f52701c}.think-hero:before{content:"";position:absolute;right:-60px;top:34px;width:42%;height:72px;border-top:1px solid rgba(14,165,233,.2);border-bottom:1px solid rgba(16,185,129,.18);transform:rotate(8deg);background:linear-gradient(90deg,#0ea5e91a,#10b98114)}.think-hero>*{position:relative;z-index:1}.think-kicker,.think-panel-head span,.think-report-strip span{text-transform:none;letter-spacing:.08em}.think-hero h1{max-width:710px;color:#0b172a}.think-hero p{color:#4d5b6f}.think-stat-grid div{border-color:#0ea5e933;box-shadow:inset 0 1px #ffffffc7}.think-preview{transform:rotate(1deg);box-shadow:0 30px 64px #0f172a29}.think-preview:hover{transform:rotate(0) translateY(-2px)}.think-command,.think-panel{border-radius:16px}.think-command.admin{background:linear-gradient(135deg,rgba(14,165,233,.18),transparent 40%),linear-gradient(135deg,#0f172a,#183047)}.think-paper-item,.type-matrix div{background:#ffffffe0;box-shadow:inset 0 1px #ffffffb8}.think-report-strip{background:linear-gradient(135deg,rgba(14,165,233,.22),transparent 42%),linear-gradient(135deg,#0f172a,#155e75)}@media (max-width: 680px){.container:has(.think-home){padding-top:16px}.think-preview{transform:none}}html{scroll-padding-top:76px}body{overflow-x:hidden}a,button,.nav-link,.think-command,.think-paper-item{touch-action:manipulation}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.nav-link:focus-visible{outline:3px solid rgba(14,165,233,.34);outline-offset:3px}.nav-link,button{min-height:40px}.brand-emoji,.ni-icon{position:relative;flex:0 0 auto;color:currentColor}.brand-emoji:before,.brand-emoji:after,.ni-icon:before,.ni-icon:after{content:"";position:absolute}.brand-emoji{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));box-shadow:0 4px 10px #0ea5e942;overflow:hidden}.brand-think:before{left:8px;top:8px;width:16px;height:16px;border:3px solid #fff;border-radius:50%}.brand-think:after{left:15px;top:5px;width:3px;height:22px;border-radius:999px;background:#fff;box-shadow:-6px 7px 0 -1px #fffffff2,6px 7px 0 -1px #fffffff2}.ni-icon{width:15px;height:15px;font-size:0}.ni-home:before{left:2px;top:6px;width:11px;height:8px;border:2px solid currentColor;border-top:0;border-radius:2px}.ni-home:after{left:2px;top:1px;width:10px;height:10px;border-left:2px solid currentColor;border-top:2px solid currentColor;transform:rotate(45deg)}.ni-problems:before,.ni-homework:before,.ni-exam:before,.ni-results:before{left:3px;top:1px;width:9px;height:13px;border:2px solid currentColor;border-radius:2px}.ni-problems:after,.ni-homework:after{left:6px;top:5px;width:6px;height:2px;background:currentColor;box-shadow:0 4px currentColor}.ni-exam:after{left:6px;top:4px;width:6px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(36deg)}.ni-results:after{left:5px;top:8px;width:2px;height:5px;background:currentColor;box-shadow:4px -3px currentColor,8px -6px currentColor}.ni-users:before{left:1px;top:3px;width:6px;height:6px;border:2px solid currentColor;border-radius:50%;box-shadow:7px 0 0 -1px currentColor}.ni-users:after{left:0;top:10px;width:15px;height:5px;border:2px solid currentColor;border-radius:999px 999px 2px 2px}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}