@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Inter:wght@400;500;600;700;800&display=swap');
:root{font-family:Inter,"Microsoft YaHei",sans-serif;color:#142744;background:#f6f9ff;--blue:#2563eb;--muted:#546886;--line:#e0eafb;--sky:#eaf3ff}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,select{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #76a7ff;outline-offset:3px}.shell{width:min(1120px,calc(100% - 52px));margin:auto}.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:2}.bar{display:flex;height:72px;align-items:center;justify-content:space-between}.brand{font-weight:800;display:flex;gap:10px;align-items:center;font-size:24px;letter-spacing:-.7px}.brand i{display:grid;place-items:center;width:36px;height:36px;background:var(--blue);color:white;border-radius:12px;font-style:normal;font-size:21px}.brand span{color:#657895;font-weight:500;font-size:12px;letter-spacing:0;margin-left:3px}.avatar{display:grid;place-items:center;width:38px;height:38px;background:#e7efff;border:1px solid #dce9ff;color:#255dc0;border-radius:50%;font-weight:700}nav{display:flex;gap:9px}nav a{padding:10px 20px;border-radius:11px;color:#526783;font-size:14px}nav a.active{background:#e9f2ff;color:#1e5ed3;font-weight:700}main{padding:28px 0 70px}.hero{background:linear-gradient(110deg,#e9f3ff,#d7eaff);border:1px solid #dceaff;border-radius:29px;overflow:hidden;min-height:340px;display:grid;grid-template-columns:1.12fr .88fr;position:relative}.heroCopy{padding:40px 0 40px 48px;z-index:1}.eyebrow,.pill{display:inline-flex;align-items:center;gap:7px;background:#fff9;color:#2457a2;border-radius:100px;padding:7px 12px;font-size:12px;font-weight:700}.hero h1{font-family:"DM Sans",Inter,sans-serif;font-size:clamp(36px,5vw,63px);line-height:1.02;letter-spacing:-.065em;margin:20px 0 12px}.hero h1 em{font-style:normal;color:var(--blue)}.hero p{margin:0 0 24px}.heroArt{position:relative;min-height:280px}.heroArt img{position:absolute;width:100%;height:100%;object-fit:cover;object-position:50% 35%;mask-image:linear-gradient(90deg,transparent,#000 22%)}.teacherTag{position:absolute;bottom:21px;right:23px;background:#ffffffeb;border-radius:14px;padding:10px 16px;font-size:13px}.teacherTag small{color:var(--muted);margin-left:8px}.btn,.linkbtn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:0;border-radius:14px;padding:12px 18px;font-weight:700;color:#21477e;background:#eaf2ff;min-height:44px}.btn.primary{background:var(--blue);color:white;box-shadow:0 6px 14px #2563eb26}.btn.white{background:white;border:1px solid #dbe8fa}.btn.danger{background:#fff0f1;color:#a42236}.btn:disabled{opacity:.55;cursor:default}.btn:active{transform:translateY(1px)}.actions{display:flex;gap:10px;flex-wrap:wrap}.goal{margin:18px 0 29px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:0 4px 14px #294d8610}.icon{width:43px;height:43px;display:grid;place-items:center;border-radius:13px;background:#eaf3ff;color:#2769df;font-size:23px;flex:none}.track{height:7px;background:#edf3ff;border-radius:10px;margin-top:9px;overflow:hidden}.track span{display:block;background:#4183fb;height:100%;border-radius:inherit}.row,.heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.heading{margin:25px 0 12px}.heading h2{margin:0;font-size:23px}.link{color:#235dc9;font-size:14px;font-weight:700}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.scene{display:block;min-height:148px;transition:transform .15s,border .15s}.scene:hover{transform:translateY(-3px);border-color:#9abfff}.scene .pill{background:#f0f5ff}.scene h3{font-size:17px;margin:14px 0 5px}.scene p,.muted,p{color:var(--muted)}.scene p{font-size:13px;margin:0;line-height:1.6}.scene:nth-child(4n+2) .icon{background:#fff0e6;color:#a85a27}.scene:nth-child(4n+3) .icon{background:#e6f6ff;color:#176799}.scene:nth-child(4n+4) .icon{background:#f0ebff;color:#654ac0}.recent{display:grid;gap:10px}.record{display:flex;align-items:center;gap:12px}.record .link{margin-left:auto}.title{margin:12px 0 5px;font-size:34px;letter-spacing:-.045em}.stack{display:grid;gap:14px}.form{max-width:760px}.form fieldset{border:0;margin:0;padding:0;min-width:0}.form legend{font-weight:700;margin-bottom:12px}.choices{display:flex;gap:9px;flex-wrap:wrap}.choice{display:inline-flex;cursor:pointer}.choice input{position:absolute;opacity:0}.choice span{border:1px solid #d7e3f6;border-radius:12px;padding:10px 15px}.choice input:checked+span{background:#eaf3ff;border-color:#75a5f9;color:#235ec8;font-weight:700}.choice input:focus-visible+span{outline:2px solid #2563eb}.check{display:flex;gap:9px;align-items:center;margin:10px 0}.call{display:grid;grid-template-columns:1.1fr .9fr;gap:17px;margin-top:15px}.stage{min-height:540px;position:relative;border-radius:24px;overflow:hidden;background:#dcecff;display:flex;align-items:end;justify-content:center}.stage>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 35%}.stage:after{content:'';position:absolute;inset:45% 0 0;background:linear-gradient(transparent,#102a53e8)}.callControls{position:relative;z-index:1;width:100%;text-align:center;color:white;padding:15px}.callControls p{color:#fff;margin:5px 0}.callControls .actions{justify-content:center}.wave{display:flex;height:42px;align-items:center;justify-content:center;gap:4px}.wave i{display:block;width:4px;height:var(--h,4px);border-radius:5px;background:#a9d9ff;transition:height .09s}.transcripts{max-height:310px;overflow:auto;display:grid;align-content:start;gap:8px}.bubble{background:#edf4ff;padding:10px 13px;border-radius:13px;overflow-wrap:anywhere}.bubble.student{background:#e8f9f2}.bubble small{display:block;color:var(--muted);margin-bottom:5px}.correction{margin-top:12px;background:#f2f8ff;padding:14px;border-radius:14px;overflow-wrap:anywhere}.correction p{margin:6px 0}.filters{display:flex;gap:9px;flex-wrap:wrap;margin:18px 0}.field,select{border:1px solid #d7e3f6;background:#fff;border-radius:11px;padding:10px;color:#142744;max-width:100%}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.metrics strong{font-size:24px}.notice{background:#fff6e7;border-radius:13px;padding:12px;color:#754d0f}.empty{color:var(--muted);padding:15px 0}dialog{border:1px solid var(--line);border-radius:18px;padding:23px;max-width:min(480px,92vw);color:#142744}dialog::backdrop{background:#19335466}button+small{margin-left:8px}
@media(max-width:750px){.shell{width:calc(100% - 28px)}.bar{height:57px}.brand span{display:none}nav{position:fixed;bottom:0;left:0;right:0;background:white;justify-content:space-around;padding:6px 0 calc(6px + env(safe-area-inset-bottom));border-top:1px solid var(--line)}nav a{padding:10px 15px}main{padding:15px 0 calc(82px + env(safe-area-inset-bottom))}.hero{min-height:265px;border-radius:21px;grid-template-columns:1.2fr .8fr}.heroCopy{padding:23px 0 23px 16px}.hero h1{font-size:38px}.hero p{font-size:13px}.heroArt{min-height:0}.heroArt img{object-position:52% 25%;mask-image:linear-gradient(90deg,transparent,#000 34%)}.teacherTag{bottom:12px;right:8px;padding:6px 8px;font-size:11px}.teacherTag small{display:none}.hero .btn{padding:8px 11px;font-size:12px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.card{padding:14px}.goal{gap:9px}.goal .icon{display:none}.goal{grid-template-columns:1fr auto}.call{grid-template-columns:1fr}.stage{min-height:380px}.metrics strong{font-size:18px}.title{font-size:28px}}
@media(max-width:750px){body.in-call .top{display:none}body.in-call main{padding-bottom:calc(28px + env(safe-area-inset-bottom))}}