/* HIEC platform: shares the existing brand palette, with task-oriented layouts. */
.hp-body{margin:0;min-height:100vh;background:#0a0a0f;color:#f1f4fb;font-family:Inter,'Microsoft YaHei',system-ui,sans-serif;line-height:1.65;font-size:15px;background-image:radial-gradient(ellipse at 85% 0,rgba(0,212,255,.065),transparent 44%),radial-gradient(ellipse at 0 80%,rgba(139,92,246,.07),transparent 40%)}
.hp-body *{box-sizing:border-box}.hp-body a{color:inherit;text-decoration:none}.hp-body button,.hp-body input,.hp-body textarea,.hp-body select{font:inherit}.hp-body button{cursor:pointer}.hp-body button:disabled{opacity:.48;cursor:wait}.hp-body a:focus-visible,.hp-body button:focus-visible,.hp-body input:focus-visible,.hp-body textarea:focus-visible,.hp-body select:focus-visible{outline:2px solid #00d4ff;outline-offset:4px}.hp-body h1,.hp-body h2,.hp-body h3,.hp-body p{margin:0}.hp-body h1{font-size:clamp(26px,3vw,38px);line-height:1.35;letter-spacing:-1px}.hp-body h2{font-size:22px}.hp-body h3{font-size:17px}.hp-muted{color:#a3adbf}.hp-fine{font-size:12px;color:#98a4b8;line-height:1.8}.hp-eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;color:#00d4ff;margin-bottom:12px}.hp-panel{background:linear-gradient(145deg,rgba(26,26,46,.78),rgba(15,20,32,.86));border:1px solid rgba(255,255,255,.095);border-radius:18px;padding:24px;min-width:0}.hp-panel h2+.hp-muted,.hp-panel h3+.hp-muted{margin-top:8px}.hp-brand{display:flex;align-items:center;gap:10px;font-size:25px;font-weight:800;letter-spacing:1px}.hp-brand img{height:38px;width:38px}.hp-brand span{font-size:12px;color:#b0bdce;font-weight:400;letter-spacing:0}.hp-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid rgba(255,255,255,.16);border-radius:10px;background:rgba(255,255,255,.035);color:#e7efff;min-height:43px;padding:10px 17px;font-weight:600;transition:background .15s,border-color .15s}.hp-button:hover{border-color:#00d4ff;background:rgba(0,212,255,.06)}.hp-primary{background:linear-gradient(110deg,#007fba,#3a55d1);border-color:rgba(0,212,255,.4);box-shadow:0 4px 25px rgba(0,212,255,.12)}.hp-primary:hover{background:linear-gradient(110deg,#0397d7,#4a68e7)}.hp-green{border-color:rgba(6,255,165,.4);color:#63e9b8}.hp-danger{border-color:rgba(255,71,87,.4);color:#ffa1ac}.hp-full{width:100%}.hp-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.hp-field{display:grid;gap:7px;font-size:13px;color:#bdc7d8;margin-bottom:16px}.hp-field input,.hp-field textarea,.hp-field select,.hp-input{width:100%;background:#0c101c;border:1px solid #303b50;border-radius:9px;color:#f1f4fb;padding:11px 12px;min-width:0}.hp-field textarea{resize:vertical;min-height:88px}.hp-field select{min-height:44px}.hp-error{color:#ff9eac;font-size:13px;margin:12px 0!important;overflow-wrap:anywhere}.hp-tag{display:inline-flex;align-items:center;gap:6px;border:1px solid #2d3b50;border-radius:30px;padding:3px 10px;font-size:11px;color:#b7c4d7;white-space:normal}.hp-tag.good{color:#70edbd;border-color:#23574a;background:#0c30251c}.hp-tag.warn{color:#edc587;border-color:#64502f}.hp-tag.blue{color:#6ce5ff;border-color:#1d5362}.hp-tag.purple{color:#bfa8ff;border-color:#4a366c}.hp-pills{display:flex;flex-wrap:wrap;gap:10px}.hp-pills span{border:1px solid #29374c;border-radius:30px;padding:6px 13px;font-size:12px;color:#acbfd5}.hp-divider{height:1px;background:#2a3345;margin:28px 0;position:relative}.hp-divider span{position:absolute;left:50%;top:0;transform:translate(-50%,-50%);background:#151928;padding:0 12px;font-size:12px;color:#8e9ab0;white-space:nowrap}
.hp-public-header{max-width:1340px;margin:auto;padding:28px 38px;display:flex;align-items:center;justify-content:space-between;gap:15px}.hp-login-layout{max-width:1220px;margin:30px auto 50px;padding:0 32px;display:grid;grid-template-columns:1.1fr 1fr;gap:80px;align-items:center}.hp-login-story h1{font-size:clamp(36px,4vw,54px);line-height:1.5;letter-spacing:-2px}.hp-login-story h1 span{background:linear-gradient(90deg,#00d4ff,#06ffa5);color:transparent;background-clip:text}.hp-login-story p{color:#a8b8cb;font-size:16px;line-height:2;margin-top:20px}.hp-login-card{padding:34px;background:linear-gradient(145deg,#1a1a2ee8,#121824ef);box-shadow:0 20px 90px #0005}.hp-login-card form{margin-top:28px}.hp-demo-accounts{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.hp-account{display:flex;flex-direction:column;align-items:center;gap:6px;border:1px solid #2e3c52;border-radius:12px;background:#0f1724;color:#e8f4ff;padding:14px 5px}.hp-account:hover{border-color:#00d4ff}.hp-account i{color:#00d4ff;font-size:20px}.hp-account small{color:#91a3bb;font-size:11px}.hp-teacher-entry{margin:12px 0 18px}.hp-orbit-art{height:260px;position:relative;margin:20px 0}.hp-orbit{position:absolute;width:280px;height:180px;border:1px solid #00d4ff55;border-radius:50%;left:50%;top:44%;transform:translate(-50%,-50%) rotate(-25deg);box-shadow:0 0 20px #00d4ff07}.hp-o2{transform:translate(-50%,-50%) rotate(45deg);border-color:#06ffa547}.hp-o3{transform:translate(-50%,-50%) rotate(105deg);border-color:#8b5cf655}.hp-orbit-core{position:absolute;top:44%;left:50%;transform:translate(-50%,-50%);border-radius:50%;width:70px;height:70px;display:grid;place-items:center;color:#68e9f8;font-size:32px;font-weight:800;background:#112b3a;box-shadow:0 0 55px #00d4ff33;border:1px solid #00d4ff66}.hp-orbit-dot{position:absolute;left:calc(50% + 120px);top:34%;width:13px;height:13px;border-radius:50%;background:#06ffa5;box-shadow:0 0 22px #06ffa5}.hp-orbit-caption{position:absolute;bottom:0;width:100%;text-align:center;color:#8298af;font-size:12px;letter-spacing:3px}
.hp-layout{display:grid;grid-template-columns:232px minmax(0,1fr);min-height:100vh}.hp-sidebar{position:sticky;top:0;height:100vh;padding:28px 16px 22px;border-right:1px solid #252b3c;background:#0d101beb;display:flex;flex-direction:column}.hp-sidebar .hp-brand{padding:0 9px;font-size:25px}.hp-sidebar .hp-brand img{width:35px;height:35px}.hp-sidebar-caption{font-size:10px;letter-spacing:2px;color:#7486a2;margin:7px 0 32px;padding-left:12px}.hp-nav{display:flex;flex-direction:column;gap:7px}.hp-nav a{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:10px;color:#9eacc0;font-size:14px}.hp-nav a i{width:20px;text-align:center}.hp-nav a:hover{background:#ffffff06;color:#e5f5ff}.hp-nav a.active{color:#54e4ff;background:linear-gradient(90deg,#00d4ff18,#00d4ff06);border:1px solid #00d4ff21}.hp-sidebar-bottom{margin-top:auto;border-top:1px solid #252d3c;padding:18px 8px 0}.hp-user{display:flex;gap:10px;align-items:center;margin-bottom:15px}.hp-avatar{width:37px;height:37px;border-radius:11px;background:linear-gradient(135deg,#173953,#292550);border:1px solid #33506c;color:#69dcef;display:grid;place-items:center;font-weight:700}.hp-user small{display:block;color:#8394ad;font-size:11px}.hp-workspace{min-width:0;padding:0 38px 42px}.hp-topbar{height:86px;display:flex;align-items:center;justify-content:space-between;gap:15px;border-bottom:1px solid #242b3c;margin-bottom:28px}.hp-topbar-title{font-size:13px;color:#9cacc2}.hp-live-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#06ffa5;box-shadow:0 0 10px #06ffa566;margin-right:7px}.hp-page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}.hp-page-head .hp-muted{margin-top:8px}.hp-grid{display:grid;gap:18px}.hp-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.hp-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.hp-section{margin-top:26px}.hp-section-heading{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:15px}.hp-hero{background:radial-gradient(ellipse at 95% 40%,#07556833,transparent 55%),linear-gradient(120deg,#151d33,#111924);border-color:#2a3e55;position:relative;overflow:hidden;display:grid;grid-template-columns:1fr 135px;gap:25px;padding:28px 30px}.hp-hero .hp-muted{margin:12px 0 20px;max-width:720px}.hp-hero-art{display:grid;place-items:center;align-self:center;font-size:67px;color:#00d4ff77;filter:drop-shadow(0 0 30px #00d4ff44)}.hp-stat{display:flex;flex-direction:column;gap:5px}.hp-stat strong{font-size:30px;font-weight:600;color:#f4f7ff}.hp-stat span{font-size:12px;color:#9eaec3}.hp-unit-card{display:flex;flex-direction:column;gap:15px;position:relative;overflow:hidden}.hp-unit-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:23px;border:1px solid #00d4ff33;background:#00d4ff0a;color:#57deff}.hp-unit-card.history .hp-unit-icon{color:#e8b867;border-color:#e8b86733;background:#e8b8670a}.hp-unit-card.astronomy .hp-unit-icon{color:#bca3ff;border-color:#bca3ff33;background:#bca3ff0a}.hp-unit-card p{font-size:13px;color:#a2b0c5;flex:1}.hp-unit-meta{display:flex;justify-content:space-between;align-items:center;gap:8px}.hp-node{border-left:3px solid #36465a;padding:12px 15px;background:#0a102077;border-radius:0 8px 8px 0}.hp-node.good{border-color:#06ffa5}.hp-node.warn{border-color:#ddb366}.hp-node h3{font-size:14px;margin-bottom:6px}.hp-empty{padding:32px;text-align:center;border:1px dashed #344055;border-radius:14px;color:#9fadc4}.hp-record{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:16px 0;border-bottom:1px solid #293043}.hp-record:last-child{border-bottom:0}.hp-record p{font-size:12px;color:#90a0b8;margin-top:4px}.hp-record-actions{display:flex;align-items:center;gap:10px}.hp-note{padding:13px 16px;border-left:3px solid #00d4ff;background:#00d4ff08;border-radius:0 8px 8px 0;color:#b3c9de;font-size:13px}.hp-note.warn{border-color:#d7ad62;background:#d7ad620b}.hp-note.good{border-color:#06ffa5;background:#06ffa50a}.hp-note.error{border-color:#ff4757;background:#ff47570a}.hp-details{margin-top:16px}.hp-details summary{cursor:pointer;color:#9eb7d1;font-size:13px;padding:9px 0}.hp-details p{font-size:13px;color:#9eafc8}.hp-sources{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px;font-size:11px;color:#8aaec9}.hp-sources a{text-decoration:underline}
.hp-classroom{display:grid;grid-template-columns:minmax(0,1fr) 295px;gap:20px;align-items:start}.hp-task-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:15px}.hp-progress{display:flex;gap:4px;margin:12px 0 22px}.hp-progress span{height:4px;flex:1;background:#273347;border-radius:3px}.hp-progress .done{background:#00d4ff}.hp-question{font-size:21px!important;line-height:1.6;margin:20px 0!important}.hp-options{display:grid;gap:11px;margin:20px 0}.hp-option{display:flex;align-items:flex-start;gap:12px;border:1px solid #344058;border-radius:11px;background:#0b112066;padding:14px 16px;cursor:pointer;font-size:14px}.hp-option:has(input:checked){border-color:#00d4ff;background:#00d4ff0d}.hp-option input{margin-top:5px;accent-color:#00d4ff}.hp-feedback{margin-top:20px;font-size:13px;border-top:1px solid #2b374b;padding-top:15px;color:#b3c8dc}.hp-material-text{font-size:16px;color:#c0cde0;line-height:2;margin:18px 0!important;white-space:pre-wrap}.hp-scene-frame{width:100%;height:410px;border:1px solid #2a3e56;border-radius:12px;background:#060b14;margin:15px 0}.hp-tutor{position:sticky;top:20px;padding:21px}.hp-tutor-head{display:flex;align-items:center;gap:12px;margin-bottom:15px}.hp-tutor-icon{width:40px;height:40px;border:1px solid #06ffa533;background:#06ffa50b;border-radius:12px;display:grid;place-items:center;color:#58e4b0;font-size:20px}.hp-chat-log{display:flex;flex-direction:column;gap:12px;max-height:390px;overflow:auto;margin:16px 0;scrollbar-width:thin}.hp-chat-message{padding:12px;border:1px solid #28364a;border-radius:10px;font-size:13px;color:#b7c8df;white-space:pre-wrap;overflow-wrap:anywhere;background:#0a1422}.hp-chat-message.user{border-color:#325568;background:#13304655}.hp-chat-message small{display:block;font-size:10px;color:#7b91aa;margin-bottom:6px}.hp-chat-form textarea{min-height:72px}.hp-decision{margin-bottom:18px}.hp-decision strong{display:block;font-size:14px;color:#77dff2;margin-bottom:5px}.hp-timeline{border-left:1px solid #32506b;margin:14px 0 0 7px;padding-left:18px}.hp-timeline-item{position:relative;margin-bottom:18px;font-size:13px}.hp-timeline-item:before{content:'';position:absolute;left:-23px;top:7px;width:8px;height:8px;background:#00d4ff;border-radius:50%}.hp-timeline-item p{color:#95a9c1;font-size:12px;margin-top:5px}.hp-code-free{white-space:pre-wrap;overflow-wrap:anywhere}.hp-agent-list{display:grid;gap:6px;margin-top:10px}.hp-agent-list div{font-size:12px;color:#95adc7;padding:6px 0;border-bottom:1px solid #273145}.hp-agent-list strong{color:#c0d5ec;margin-right:8px}.hp-report-number{font-size:44px;color:#64e6bd;line-height:1.4}.hp-table-wrap{overflow:auto}.hp-table{width:100%;border-collapse:collapse;font-size:12px}.hp-table th,.hp-table td{padding:11px 12px;text-align:left;border-bottom:1px solid #28364b;vertical-align:top}.hp-table th{color:#a7bad1;font-weight:500;white-space:nowrap}.hp-table td{color:#c3d0e0}.hp-editor-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.hp-editor-grid .wide{grid-column:1/-1}.hp-checks{display:flex;gap:16px;flex-wrap:wrap;margin:10px 0 18px;color:#b5c6dc;font-size:13px}.hp-checks input{accent-color:#00d4ff;margin-right:6px}.hp-question-editor{border:1px solid #2e3c50;border-radius:12px;padding:17px;margin:13px 0}.hp-question-editor textarea{min-height:66px}.hp-preview{border:1px dashed #3a6480;padding:20px;border-radius:12px;margin:20px 0}.hp-room-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:20px;align-items:start}.hp-online{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.hp-online span{font-size:12px;background:#06ffa50a;color:#93dfc2;border:1px solid #06ffa52b;border-radius:20px;padding:4px 10px}.hp-room-message{border-bottom:1px solid #29364b;padding:10px 0;font-size:13px}.hp-room-message small{display:block;color:#88a0bd;font-size:11px;margin-bottom:4px}.hp-room-log{max-height:300px;overflow:auto;margin:12px 0 18px}.hp-annotation{padding:12px 15px;background:#152235;border-left:3px solid #00d4ff;border-radius:0 9px 9px 0;margin:10px 0}.hp-annotation strong{font-size:12px;color:#6bdaee}.hp-annotation p{font-size:13px;margin-top:5px;overflow-wrap:anywhere}.hp-outcome{border-color:#06ffa52a;background:#12352920}.hp-mobile-only{display:none}.hp-loading{display:flex;justify-content:center;align-items:center;gap:15px;min-height:70vh;color:#8ea9c3}.hp-spinner{width:24px;height:24px;border:2px solid #254055;border-top-color:#00d4ff;border-radius:50%;animation:hp-spin .8s linear infinite}@keyframes hp-spin{to{transform:rotate(360deg)}}#hp-status{position:fixed;top:0;left:0;right:0;z-index:200;background:#12404a;color:#c2f7ff;text-align:center;font-size:12px;padding:4px 12px;display:none}#hp-status.visible{display:block}#hp-status.error{background:#66303c;color:#ffe0e5}#hp-toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);max-width:min(620px,calc(100vw - 32px));padding:13px 20px;background:#1a293e;border:1px solid #426a84;box-shadow:0 5px 40px #0007;border-radius:12px;color:#d8f1ff;font-size:13px;z-index:200;display:none;white-space:pre-wrap}#hp-toast.visible{display:block}.hp-diagram{min-height:220px;display:grid;place-items:center;border:1px solid #2b465e;border-radius:12px;background:radial-gradient(ellipse,#0c2c3b44,transparent);padding:20px;margin:20px 0}.hp-diagram svg{width:100%;max-width:440px;height:230px}.hp-diagram-steps{display:flex;gap:14px;align-items:center;justify-content:center;flex-wrap:wrap}.hp-diagram-steps span{border:1px solid #346076;border-radius:12px;padding:16px;color:#a1def1}
@media(min-width:1600px){.hp-workspace{padding-left:55px;padding-right:55px}.hp-classroom{grid-template-columns:minmax(0,1fr) 350px}.hp-scene-frame{height:490px}}
@media(max-width:1150px){.hp-layout{grid-template-columns:195px minmax(0,1fr)}.hp-workspace{padding:0 23px 32px}.hp-classroom,.hp-room-layout{grid-template-columns:minmax(0,1fr)}.hp-tutor{position:static}.hp-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.hp-login-layout{gap:35px}.hp-sidebar .hp-brand{font-size:22px}.hp-sidebar .hp-brand img{width:29px;height:29px}}
@media(max-width:760px){.hp-public-header{padding:20px}.hp-public-header .hp-brand span{display:none}.hp-login-layout{display:flex;flex-direction:column;padding:0 20px;margin:15px auto 30px;gap:30px;max-width:540px}.hp-login-story{width:100%}.hp-login-story h1{font-size:34px}.hp-login-story p{font-size:14px}.hp-orbit-art{display:none}.hp-login-story .hp-pills{margin-top:20px}.hp-login-card{width:100%;padding:23px}.hp-layout{display:block}.hp-sidebar{height:auto;position:static;padding:16px;border-right:0;border-bottom:1px solid #273346}.hp-sidebar .hp-brand{font-size:20px}.hp-sidebar-caption{display:none}.hp-nav{flex-direction:row;overflow:auto;margin-top:15px;gap:5px;padding-bottom:3px}.hp-nav a{white-space:nowrap;padding:9px 12px;font-size:12px;gap:7px}.hp-sidebar-bottom{display:none}.hp-workspace{padding:0 17px 30px}.hp-topbar{height:65px;margin-bottom:22px}.hp-mobile-only{display:inline-flex}.hp-topbar .hp-tag{max-width:160px;font-size:10px}.hp-page-head{align-items:flex-start;flex-direction:column;gap:15px}.hp-page-head h1{font-size:26px}.hp-grid-3,.hp-grid-2,.hp-editor-grid{grid-template-columns:1fr}.hp-hero{padding:22px;grid-template-columns:1fr}.hp-hero-art{display:none}.hp-panel{padding:20px}.hp-grid{gap:14px}.hp-stat strong{font-size:25px}.hp-stats-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.hp-stats-row .hp-panel{padding:13px}.hp-stats-row .hp-stat span{font-size:10px}.hp-record{align-items:flex-start;flex-direction:column;gap:10px}.hp-record-actions{width:100%;justify-content:space-between}.hp-scene-frame{height:330px}.hp-question{font-size:18px!important}.hp-option{padding:12px}.hp-task-heading{align-items:flex-start}.hp-task-heading h2{font-size:19px}.hp-table{min-width:520px}.hp-actions .hp-button{font-size:12px;padding:9px 12px}.hp-editor-grid .wide{grid-column:auto}.hp-demo-accounts{gap:6px}.hp-demo-accounts small{font-size:10px}.hp-room-layout{gap:15px}.hp-tutor{padding:20px}.hp-fine{font-size:11px}}
@media(prefers-reduced-motion:reduce){.hp-body *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}