:root{--primary:#156b63;--primary-dark:#0f4f49;--accent:#f0a84b;--ink:#172321;--muted:#6d7d79;--line:#dfe8e5;--bg:#f4f7f6;--surface:#fff;--danger:#d94a4a;--shadow:0 10px 30px rgba(20,55,49,.08);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{min-height:100vh}button,input,textarea,select{font:inherit}button{cursor:pointer}.hidden{display:none!important}.muted{color:var(--muted)}
.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(340px,1fr) minmax(420px,520px);background:#eaf1ef}.login-visual{position:relative;overflow:hidden;background:url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?auto=format&fit=crop&w=1800&q=90') center/cover}.login-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,47,44,.15),rgba(8,47,44,.8))}.visual-copy{position:absolute;z-index:1;left:clamp(32px,6vw,96px);right:40px;bottom:9vh;color:#fff}.visual-copy h1{font-size:clamp(36px,5vw,68px);line-height:1.05;margin:0 0 18px;letter-spacing:0}.visual-copy p{font-size:18px;margin:0;opacity:.88}.login-panel{background:#fff;padding:clamp(40px,7vw,90px);display:flex;flex-direction:column;justify-content:center}.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:22px}.brand-mark{width:42px;height:42px;border-radius:8px;background:var(--primary);color:#fff;display:grid;place-items:center;font-family:serif;font-size:23px;flex:none}.login-panel h2{font-size:30px;margin:54px 0 8px;letter-spacing:0}.login-panel>p{margin:0 0 30px;color:var(--muted)}.form-group{display:grid;gap:8px;margin-bottom:18px}.form-group label{font-size:14px;font-weight:700}.input-wrap{position:relative}.input-wrap i,.input-wrap svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:19px;color:#80918d}.input-wrap input{padding-left:44px}.input,select,textarea{width:100%;border:1px solid var(--line);border-radius:6px;padding:12px 14px;background:#fff;outline:none;transition:.2s}.input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 12%,transparent)}textarea{resize:vertical;min-height:90px}.btn{border:0;border-radius:6px;padding:11px 18px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.2s}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:#e9f1ef;color:var(--primary-dark)}.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}.btn-danger{background:#fff0f0;color:var(--danger)}.btn-block{width:100%;padding:14px}.login-tip{font-size:12px;color:#8b9996;margin-top:26px;padding-top:20px;border-top:1px solid var(--line);line-height:1.8}
.app-shell{max-width:540px;margin:0 auto;min-height:100vh;background:var(--bg);position:relative;padding-bottom:82px;box-shadow:0 0 40px rgba(16,55,49,.08)}.app-head{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid #edf2f1}.app-head .brand{font-size:18px}.app-head .brand-mark{width:36px;height:36px;font-size:19px}.avatar{width:38px;height:38px;border-radius:50%;border:0;background:#dfece9;color:var(--primary-dark);display:grid;place-items:center;font-weight:800}.page{display:none;padding:18px 16px 28px}.page.active{display:block}.hero{position:relative;min-height:210px;border-radius:8px;overflow:hidden;color:#fff;background-size:cover;background-position:center;padding:24px;display:flex;flex-direction:column;justify-content:flex-end}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,42,39,.08),rgba(12,42,39,.85))}.hero>*{position:relative}.hero .eyebrow{font-size:13px;opacity:.85}.hero h1{font-size:28px;margin:7px 0 5px;line-height:1.2;letter-spacing:0}.hero p{margin:0 0 20px;opacity:.83}.hero .btn{align-self:flex-start;background:#fff;color:var(--primary-dark)}.hero .done{display:flex;align-items:center;gap:8px;font-weight:700}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;margin-top:14px;border-radius:8px;border:1px solid var(--line)}.stat{text-align:center;padding:18px 6px;position:relative}.stat:not(:last-child):after{content:"";position:absolute;right:0;top:20%;height:60%;width:1px;background:var(--line)}.stat strong{display:block;font-size:23px;color:var(--ink)}.stat span{font-size:12px;color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:center;margin:24px 2px 12px}.section-head h2,.page-title h1{font-size:19px;margin:0;letter-spacing:0}.text-btn{border:0;background:transparent;color:var(--primary);font-weight:700;font-size:13px}.recent-list,.mistake-list{display:grid;gap:10px}.recent-item{background:#fff;border:1px solid var(--line);border-radius:7px;padding:14px;display:flex;align-items:center;gap:12px}.score-ring{width:46px;height:46px;border-radius:50%;background:#e8f3f1;color:var(--primary);display:grid;place-items:center;font-weight:800}.recent-item .grow{flex:1}.recent-item h3{font-size:14px;margin:0 0 4px}.recent-item p{font-size:12px;color:var(--muted);margin:0}.tag{display:inline-flex;align-items:center;padding:4px 8px;border-radius:4px;background:#edf5f3;color:var(--primary-dark);font-size:11px;font-weight:700}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(540px,100%);height:70px;background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr);z-index:30;padding-bottom:env(safe-area-inset-bottom)}.nav-btn{border:0;background:transparent;color:#82908d;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10px}.nav-btn svg{width:21px}.nav-btn.active{color:var(--primary);font-weight:700}.page-title{display:flex;align-items:flex-end;justify-content:space-between;margin:4px 2px 18px}.page-title p{margin:6px 0 0;color:var(--muted);font-size:13px}.filter-row{display:flex;gap:8px;overflow:auto;margin-bottom:15px;scrollbar-width:none}.filter-chip{border:1px solid var(--line);background:#fff;padding:7px 13px;border-radius:18px;white-space:nowrap;font-size:12px}.filter-chip.active{background:var(--primary);border-color:var(--primary);color:#fff}.course-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.course-card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;cursor:pointer}.course-cover{aspect-ratio:1.4;background:#dce7e4 center/cover}.course-body{padding:12px}.course-card h3{font-size:14px;margin:7px 0 5px;line-height:1.4}.course-card p{font-size:11px;color:var(--muted);margin:0}.progress{height:4px;border-radius:4px;background:#e7eeec;margin-top:10px;overflow:hidden}.progress span{display:block;height:100%;background:var(--accent)}.ranking-podium{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:end;gap:8px;margin:28px 4px 18px}.podium-person{text-align:center}.podium-avatar{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;margin:0 auto 7px;background:#dcebe8;color:var(--primary);font-weight:800;border:3px solid #fff;box-shadow:0 3px 12px rgba(10,65,58,.12)}.podium-person:nth-child(2){order:-1}.podium-person:nth-child(1) .podium-avatar{width:64px;height:64px;background:#fff0cf;color:#9b670d}.podium-person h3{font-size:13px;margin:0}.podium-person p{font-size:11px;color:var(--muted);margin:3px 0}.podium-block{height:54px;background:#e9f2f0;margin-top:10px;border-radius:6px 6px 0 0;display:grid;place-items:center;font-weight:800;color:var(--primary)}.podium-person:nth-child(1) .podium-block{height:78px;background:#f8e6b8;color:#8c6313}.podium-person:nth-child(2) .podium-block{height:42px}.rank-list{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}.rank-row{display:grid;grid-template-columns:35px 42px 1fr auto;gap:10px;align-items:center;padding:13px 14px;border-bottom:1px solid #edf2f1}.rank-row:last-child{border:0}.rank-row.me{background:#edf7f5}.rank-num{font-weight:800;color:var(--muted)}.mini-avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#e6eeec;font-weight:700;color:var(--primary)}.rank-row h3{font-size:13px;margin:0}.rank-row p{font-size:11px;color:var(--muted);margin:3px 0 0}.points{font-weight:800;color:var(--primary)}.mistake-card{background:#fff;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:6px;padding:15px}.mistake-card h3{font-size:14px;line-height:1.55;margin:9px 0}.answer-line{font-size:12px;margin:5px 0}.wrong{color:var(--danger)}.right{color:var(--primary)}.explanation{font-size:12px;color:#52615e;background:#f4f7f6;padding:10px;border-radius:5px;line-height:1.6;margin-top:10px}.profile-card{background:var(--primary);color:#fff;padding:26px 20px;border-radius:8px;display:flex;align-items:center;gap:16px}.profile-card .avatar{width:60px;height:60px;background:#fff;color:var(--primary);font-size:22px}.profile-card h2{font-size:20px;margin:0 0 5px}.profile-card p{margin:0;font-size:12px;opacity:.75}.menu-list{margin-top:16px;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}.menu-item{width:100%;border:0;background:#fff;padding:16px;display:flex;gap:12px;align-items:center;text-align:left;border-bottom:1px solid #edf2f1}.menu-item:last-child{border:0}.menu-item svg{width:19px;color:var(--primary)}.menu-item span{flex:1;font-weight:600;font-size:14px}
.full-view{position:fixed;inset:0;background:var(--bg);z-index:80;overflow:auto}.view-head{height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 16px;position:sticky;top:0;z-index:2}.icon-btn{width:38px;height:38px;border:0;background:transparent;border-radius:50%;display:grid;place-items:center;color:var(--ink)}.view-head h2{font-size:17px;margin:0 auto}.quiz-wrap{max-width:680px;margin:0 auto;padding:24px 18px 60px}.quiz-progress{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);margin-bottom:13px}.quiz-progress-bar{height:6px;background:#dde7e4;border-radius:6px;overflow:hidden;margin-bottom:30px}.quiz-progress-bar span{display:block;height:100%;background:var(--primary);transition:.25s}.question-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px}.question-card h1{font-size:20px;line-height:1.55;margin:13px 0 22px;letter-spacing:0}.options{display:grid;gap:11px}.option{border:1px solid var(--line);border-radius:7px;background:#fff;text-align:left;padding:14px;display:flex;gap:12px;align-items:center}.option b{width:28px;height:28px;border-radius:50%;background:#edf2f1;display:grid;place-items:center;flex:none}.option.selected{border-color:var(--primary);background:#edf7f5}.option.selected b{background:var(--primary);color:#fff}.quiz-actions{display:flex;gap:10px;margin-top:20px}.quiz-actions .btn{flex:1}.result-hero{text-align:center;padding:18px}.result-score{width:130px;height:130px;border-radius:50%;margin:5px auto 20px;background:#fff;border:10px solid #dcece8;display:grid;place-items:center;color:var(--primary)}.result-score strong{font-size:42px}.result-hero h1{margin:0 0 8px}.result-details{display:grid;gap:10px}.result-item{background:#fff;border:1px solid var(--line);border-radius:7px;padding:15px}.result-item.correct{border-left:3px solid var(--primary)}.result-item.incorrect{border-left:3px solid var(--danger)}.result-item h3{font-size:14px;line-height:1.55;margin:8px 0}.course-player{max-width:900px;margin:0 auto;padding-bottom:50px}.course-player video{width:100%;display:block;background:#111;aspect-ratio:16/9}.course-info{padding:22px 18px}.course-info h1{font-size:22px;margin:10px 0}.course-info p{color:var(--muted);line-height:1.7}.empty{text-align:center;color:var(--muted);padding:50px 20px}.empty svg{width:42px;height:42px;opacity:.35}.toast{position:fixed;z-index:999;left:50%;bottom:90px;transform:translate(-50%,20px);background:#172321;color:#fff;padding:11px 17px;border-radius:6px;opacity:0;pointer-events:none;transition:.25s;font-size:13px;max-width:80%;text-align:center}.toast.show{opacity:1;transform:translate(-50%,0)}.modal{position:fixed;inset:0;background:rgba(10,28,25,.45);z-index:100;display:grid;place-items:center;padding:20px}.modal-card{width:min(440px,100%);background:#fff;border-radius:8px;padding:22px;box-shadow:var(--shadow)}.modal-card h2{font-size:19px;margin:0 0 20px}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}
@media(max-width:760px){.login-shell{display:block;background:#fff}.login-visual{height:31vh;min-height:210px}.visual-copy{left:24px;bottom:28px}.visual-copy h1{font-size:38px}.login-panel{padding:28px 24px;justify-content:flex-start}.login-panel .brand{display:none}.login-panel h2{margin:4px 0 7px;font-size:26px}.login-tip{margin-top:18px}.course-grid{gap:10px}}
@media(min-width:900px){body:has(.app-shell:not(.hidden)){background:#e9f0ee}.app-shell{margin-top:18px;margin-bottom:18px;min-height:calc(100vh - 36px);border-radius:10px;overflow:hidden}.bottom-nav{bottom:18px;border-radius:0 0 10px 10px}}
.brand-mark{background-position:center;background-size:cover;background-repeat:no-repeat}
.podium-person:nth-child(2) .podium-block{height:54px}.podium-person:nth-child(3) .podium-block{height:42px}
.reading-passage{margin:18px 0;padding:16px;border-left:3px solid var(--primary);background:#f1f6f5;color:#40514d;line-height:1.75;font-size:14px}.reading-passage p{margin:7px 0 0;white-space:pre-line}.fill-answer{display:grid;gap:8px}.fill-answer label{font-size:12px;font-weight:700;color:var(--muted)}.fill-answer .input{font-size:17px;padding:14px}
.checkin-calendar{margin-top:12px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:8px}.calendar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:13px}.calendar-head>div:first-child{display:flex;align-items:baseline;gap:10px}.calendar-head h2{font-size:16px;margin:0}.calendar-head span{font-size:12px;color:var(--muted)}.calendar-actions{display:flex;gap:2px}.calendar-actions .icon-btn{width:30px;height:30px}.calendar-actions .icon-btn svg{width:17px}.calendar-actions .icon-btn:disabled{opacity:.25;cursor:not-allowed}.calendar-week,.calendar-days{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:5px}.calendar-week{margin-bottom:5px}.calendar-week span{text-align:center;color:var(--muted);font-size:11px}.calendar-day{height:40px;border-radius:5px;display:flex;align-items:center;justify-content:center;gap:2px;position:relative;font-size:12px;color:#51605d}.calendar-day b{font-weight:600}.calendar-day svg{width:12px;height:12px;stroke-width:3}.calendar-day.checked{background:#e4f2ef;color:var(--primary-dark)}.calendar-day.today{box-shadow:inset 0 0 0 1px var(--primary)}.calendar-day.empty-day{visibility:hidden}
.past-test-list{display:grid;gap:10px}.past-test-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px;display:grid;grid-template-columns:52px 1fr 20px;gap:13px;align-items:center;cursor:pointer;transition:.2s}.past-test-card:hover{border-color:var(--primary);transform:translateY(-1px)}.past-test-date{width:52px;height:58px;border-radius:6px;background:#edf5f3;color:var(--primary);display:flex;flex-direction:column;align-items:center;justify-content:center}.past-test-date strong{font-size:21px;line-height:1}.past-test-date span{font-size:9px;margin-top:6px}.past-test-info{min-width:0}.past-test-info>div{display:flex;align-items:center;gap:8px}.past-test-info h3{font-size:14px;margin:7px 0 4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.past-test-info p{font-size:11px;color:var(--muted);margin:0}.past-test-card>svg{width:18px;color:#91a09d}.tag.missed{background:#fff0e5;color:#b66a13}.retake-count{font-size:10px;color:var(--muted)}
.profile-avatar-control{position:relative;display:block;cursor:pointer;flex:none}.profile-avatar-control .avatar{background-position:center;background-size:cover;background-repeat:no-repeat}.avatar-camera{position:absolute;right:-2px;bottom:-2px;width:22px;height:22px;border-radius:50%;background:#fff;color:var(--primary);display:grid;place-items:center;box-shadow:0 2px 7px rgba(0,0,0,.16)}.avatar-camera svg{width:12px;height:12px}
.login-visual{background-image:url('/assets/course-growth.jpg')}