:root{--ink:#20384a;--blue:#315ccf;--blue2:#24469f;--paper:#f7f9fa;--pale:#dce7f1;--sun:#f4c96a;--sunlite:#fff3d1;--coral:#cb625e;--corallite:#fcebe8;--white:#fff;--muted:#6c7d88;--line:#d9e2e7;--shadow:0 16px 44px rgba(25,52,75,.07);--radius:22px;font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin-top:0}h1,h2,h3{letter-spacing:-.025em}h1{font-size:clamp(2rem,4vw,3.8rem);line-height:1.13}h2{font-size:clamp(1.45rem,2.5vw,2.25rem);line-height:1.2}h3{font-size:1.08rem}small{color:var(--muted)}:focus-visible{outline:3px solid var(--sun);outline-offset:3px}
.loading-screen{min-height:100vh;display:grid;place-content:center;text-align:center;gap:12px}.loading-screen .logo-mark{margin:auto}.loading-screen p{color:var(--muted)}
.app-shell{min-height:100vh}.topbar{height:74px;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:28px;padding:0 clamp(20px,4vw,64px);position:sticky;top:0;z-index:20;backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:12px;white-space:nowrap}.logo-mark{width:39px;height:39px;background:var(--ink);color:var(--white);display:grid;place-items:center;border-radius:12px;font:700 22px Georgia,serif;transform:rotate(-6deg)}.brand-name{font-family:Georgia,"Songti SC",serif;font-size:23px;font-weight:700;letter-spacing:-.04em}.brand-sub{font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);display:block;margin-top:-3px}.topnav{display:flex;align-items:center;gap:4px;margin-left:auto}.nav-link{border:0;background:transparent;padding:12px 17px;border-radius:11px;color:#5f717c;font-weight:650}.nav-link:hover,.nav-link.active{color:var(--blue);background:#edf2ff}.top-actions{display:flex;align-items:center;gap:12px}.account-pill{border:1px solid var(--line);background:white;color:var(--ink);padding:9px 14px;border-radius:999px;font-size:13px;max-width:190px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.demo-bar{background:var(--sunlite);border-bottom:1px solid #e7d69f;padding:8px 24px;text-align:center;color:#715724;font-size:12px;font-weight:650}.site-main{max-width:1440px;margin:auto;padding:clamp(24px,3vw,44px) clamp(18px,4vw,64px) 100px}.bottom-nav{display:none}
.page-header{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:30px}.eyebrow{text-transform:uppercase;letter-spacing:.17em;font:700 11px ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--blue);margin:0 0 12px}.page-header h1{margin-bottom:10px}.page-header p:last-child{color:var(--muted);margin-bottom:0}.mini-date{font:700 12px ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--muted);white-space:nowrap}.grid-2{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(330px,.85fr);gap:22px}.panel{background:#fff;border:1px solid #e2e9ed;border-radius:var(--radius);box-shadow:var(--shadow);padding:clamp(22px,3vw,36px)}.panel+.panel{margin-top:0}.panel-head{display:flex;justify-content:space-between;align-items:start;gap:16px}.panel-head h2,.panel-head h3{margin-bottom:5px}.subtle{color:var(--muted);font-size:14px;line-height:1.65}.pill{display:inline-flex;align-items:center;border-radius:999px;padding:6px 11px;background:#edf2ff;color:var(--blue2);font-size:11px;font-weight:750;white-space:nowrap}.pill.sample{background:var(--sunlite);color:#7a5e21}.pill.planned{background:#edf1f3;color:#697a83}.pill.good{background:#e6f4ec;color:#35745b}.pill.bad{background:var(--corallite);color:var(--coral)}.muted-line{height:1px;background:var(--line);margin:24px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:11px 19px;border-radius:12px;border:1px solid transparent;background:var(--blue);color:white;font-weight:750;line-height:1.25;transition:transform .2s,background .2s,border-color .2s}.btn:hover:not(:disabled){transform:translateY(-2px);background:var(--blue2)}.btn.primary-dark{background:var(--ink)}.btn.primary-dark:hover{background:#142b3a}.btn.secondary{background:white;color:var(--ink);border-color:var(--line)}.btn.secondary:hover{background:#edf3f7;border-color:#bcccd5}.btn.ghost{background:transparent;color:var(--blue);border-color:transparent;padding-left:8px;padding-right:8px}.btn.ghost:hover{background:#edf2ff}.btn.soft{background:#edf2ff;color:var(--blue)}.btn.soft:hover{background:#dbe6ff}.btn.wide{width:100%}.btn.small{min-height:35px;padding:7px 11px;font-size:12px;border-radius:9px}.button-row{display:flex;gap:10px;flex-wrap:wrap}.button-row>.btn{flex:0 0 auto}
.daily-hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;min-height:368px;display:grid;grid-template-columns:1fr 245px;gap:20px}.daily-hero::after{content:"";position:absolute;width:380px;height:380px;border:1px solid rgba(255,255,255,.1);border-radius:50%;right:-120px;top:-125px;box-shadow:0 0 0 55px rgba(255,255,255,.025),0 0 0 110px rgba(255,255,255,.02)}.daily-hero>*{position:relative;z-index:1}.daily-hero .eyebrow{color:#a5c1ff}.daily-hero h2{font-family:Georgia,"Songti SC",serif;font-weight:700;font-size:clamp(2.15rem,3.5vw,3.75rem);line-height:1.22;margin:10px 0 18px;max-width:580px}.daily-hero h2 em{font-style:normal;color:var(--sun)}.daily-hero .subtle{color:#c9d6dc;max-width:480px}.daily-hero .btn{background:var(--sun);color:var(--ink);margin-top:20px}.daily-hero .btn:hover{background:#f7d57d}.hero-ticket{align-self:center;justify-self:center;width:210px;height:238px;background:#f7fbff;color:var(--ink);border-radius:10px;transform:rotate(7deg);padding:20px;box-shadow:0 15px 30px rgba(0,0,0,.18);display:flex;flex-direction:column;justify-content:space-between}.ticket-label{font:700 11px ui-monospace,monospace;letter-spacing:.12em;color:#678092;text-transform:uppercase}.ticket-word{font:700 32px Georgia,serif;word-break:break-word;line-height:1.1}.ticket-line{height:1px;background:#d3e0e7;width:100%}.ticket-note{font-size:12px;color:var(--muted)}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0}.metric{background:white;border:1px solid var(--line);border-radius:16px;padding:18px 20px}.metric strong{display:block;font:700 28px Georgia,serif;margin-bottom:4px}.metric span{color:var(--muted);font-size:12px}.section-head{display:flex;justify-content:space-between;align-items:end;margin:42px 0 17px;gap:20px}.section-head h2{margin-bottom:4px}.task-list{display:grid;gap:10px}.task-item{display:flex;align-items:center;gap:17px;border:1px solid var(--line);border-radius:14px;padding:15px;background:#fff}.task-symbol{width:43px;height:43px;border-radius:11px;display:grid;place-items:center;background:#edf2ff;color:var(--blue);font:700 25px Georgia,serif;flex:none}.task-item strong{display:block}.task-item small{display:block;margin-top:3px}.task-item .btn{margin-left:auto}.empty{border:1px dashed #bfcdd6;background:#f9fbfc;border-radius:16px;padding:24px;color:var(--muted);line-height:1.6}.empty strong{color:var(--ink)}
.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.catalog-card{border:1px solid var(--line);background:#fff;border-radius:18px;min-height:195px;padding:22px;display:flex;flex-direction:column;align-items:start;transition:transform .2s,box-shadow .2s}.catalog-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.catalog-card.planned{background:#f5f8fa}.catalog-card h3{font-size:20px;margin:17px 0 8px}.catalog-card p{color:var(--muted);font-size:13px;margin:0 0 18px;line-height:1.5}.catalog-card .card-foot{margin-top:auto;width:100%;display:flex;align-items:center;justify-content:space-between}.catalog-card .arrow{font-size:24px;color:var(--blue)}.lesson-list{display:grid;gap:9px;margin-top:16px}.lesson-row{width:100%;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#fff;color:var(--ink)}.lesson-row:hover,.lesson-row.selected{border-color:var(--blue);background:#f4f7ff}.lesson-row span:first-child{font-weight:700}.lesson-row small{margin-left:auto}.content-split{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px}.side-note{border-left:3px solid var(--sun);padding:14px 0 14px 18px;color:var(--muted);line-height:1.75;font-size:13px}
.practice-shell{max-width:990px;margin:0 auto}.practice-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:16px;position:sticky;top:74px;z-index:8;background:var(--paper);padding:10px 0}.practice-top .btn{flex:none}.progress-track{height:7px;background:#dde6ed;border-radius:999px;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--blue);border-radius:inherit;transition:width .3s}.practice-card{background:white;border:1px solid var(--line);border-radius:26px;min-height:610px;box-shadow:var(--shadow);padding:clamp(24px,5vw,58px);margin-top:15px;position:relative;overflow:hidden}.practice-card::before{content:"";position:absolute;width:180px;height:180px;border-radius:50%;right:-75px;top:-80px;background:#edf3ff}.practice-card>*{position:relative}.practice-kicker{display:flex;align-items:center;gap:9px;color:var(--blue);font:700 11px ui-monospace,monospace;letter-spacing:.14em;text-transform:uppercase}.practice-main{max-width:640px;margin:35px auto 0;text-align:center}.practice-main h1{font-family:Georgia,"Songti SC",serif;font-size:clamp(2.8rem,6vw,5.5rem);margin:10px 0 12px}.practice-main .meaning{font-size:clamp(1.6rem,4vw,2.5rem);font-weight:750;line-height:1.35;margin:12px 0 27px}.practice-main .pos{color:var(--muted);font-size:13px}.audio-button{width:50px;height:50px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--blue);font-size:23px;display:inline-grid;place-items:center;vertical-align:middle}.audio-button:hover{background:#edf2ff}.word-meta{display:flex;gap:9px;justify-content:center;flex-wrap:wrap;margin:20px 0}.word-meta span{background:#f1f5f8;border-radius:8px;padding:7px 10px;font-size:12px;color:#4b6272}.example-box{border-left:3px solid var(--sun);background:#f7f9fb;padding:16px 19px;text-align:left;border-radius:0 12px 12px 0;margin:24px auto;max-width:560px}.example-box strong{font:600 17px Georgia,serif}.example-box small{display:block;margin-top:5px}.practice-actions{display:flex;justify-content:center;gap:12px;margin-top:32px}.practice-actions .btn{min-width:155px}
.cover-slip{margin:0 auto 20px;max-width:480px;background:var(--sunlite);border:1px solid #efdaa2;border-radius:9px 19px 19px 9px;min-height:92px;display:flex;align-items:center;justify-content:center;transform:rotate(-2deg);box-shadow:5px 7px 0 #d9e5eb;font:700 20px Georgia,serif;color:#8b6a24;position:relative}.cover-slip::after{content:"";position:absolute;right:0;top:0;border-top:28px solid #fff9e9;border-left:28px solid transparent;border-radius:0 18px 0 0}.answer-input{width:100%;min-height:132px;border:0;border-bottom:3px solid var(--blue);background:#f5f8fc;border-radius:15px 15px 0 0;padding:21px 24px;resize:vertical;outline:none;font:500 clamp(25px,4vw,39px) Georgia,serif;text-align:center;color:var(--ink);line-height:1.4}.answer-input:focus{background:#edf3ff}.answer-input::placeholder{color:#9fb0bc;font:400 18px "PingFang SC",system-ui,sans-serif}.input-help{color:var(--muted);font-size:12px;margin-top:10px}.feedback-word{font:700 clamp(2.7rem,6vw,5rem) Georgia,serif;line-height:1.13;margin:14px 0}.feedback-banner{display:inline-flex;padding:9px 14px;border-radius:999px;font-weight:800}.feedback-banner.correct{background:#e6f4ec;color:#317358}.feedback-banner.wrong{background:var(--corallite);color:var(--coral)}.feedback-input{font:600 18px Georgia,serif;color:var(--muted);margin:12px 0}.result-numbers{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin:28px 0}.result-numbers div{background:#f1f5f8;border-radius:13px;padding:18px}.result-numbers strong{display:block;font:700 30px Georgia,serif}.result-numbers small{font-size:11px}
.inline-audio{border:0;background:transparent;color:var(--blue);font-size:18px;margin-left:8px;vertical-align:middle;border-radius:6px}.inline-audio:hover{background:#e8efff}.cover-slip{margin:0 auto 20px;max-width:480px;background:var(--sunlite);border:1px solid #efdaa2;border-radius:9px 19px 19px 9px;min-height:92px;display:flex;align-items:center;justify-content:center;transform:rotate(-2deg);box-shadow:5px 7px 0 #d9e5eb;font:700 20px Georgia,serif;color:#8b6a24;position:relative}.cover-slip::after{content:"";position:absolute;right:0;top:0;border-top:28px solid #fff9e9;border-left:28px solid transparent;border-radius:0 18px 0 0}.answer-input{width:100%;min-height:132px;border:0;border-bottom:3px solid var(--blue);background:#f5f8fc;border-radius:15px 15px 0 0;padding:21px 24px;resize:vertical;outline:none;font:500 clamp(25px,4vw,39px) Georgia,serif;text-align:center;color:var(--ink);line-height:1.4}.answer-input:focus{background:#edf3ff}.answer-input::placeholder{color:#9fb0bc;font:400 18px "PingFang SC",system-ui,sans-serif}.input-help{color:var(--muted);font-size:12px;margin-top:10px}.feedback-word{font:700 clamp(2.7rem,6vw,5rem) Georgia,serif;line-height:1.13;margin:14px 0}.feedback-banner{display:inline-flex;padding:9px 14px;border-radius:999px;font-weight:800}.feedback-banner.correct{background:#e6f4ec;color:#317358}.feedback-banner.wrong{background:var(--corallite);color:var(--coral)}.feedback-input{font:600 18px Georgia,serif;color:var(--muted);margin:12px 0}.result-numbers{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin:28px 0}.result-numbers div{background:#f1f5f8;border-radius:13px;padding:18px}.result-numbers strong{display:block;font:700 30px Georgia,serif}.result-numbers small{font-size:11px}
.form-grid{display:grid;gap:14px}.field{display:grid;gap:7px;color:var(--ink);font-size:13px;font-weight:700}.field input,.field select,.field textarea{border:1px solid #cbd8df;background:#fff;border-radius:10px;padding:12px 13px;color:var(--ink);min-height:45px;outline:none;width:100%}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #e8eeff}.field textarea{min-height:85px;resize:vertical}.inline-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}.form-hint{font-size:12px;color:var(--muted);line-height:1.55}.notice{background:#edf2ff;color:#38539b;padding:14px 17px;border-radius:12px;font-size:13px;line-height:1.6}.notice.warning{background:var(--sunlite);color:#755d26}.notice.error{background:var(--corallite);color:#a04440}.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 17px;border-radius:11px;z-index:60;box-shadow:0 12px 30px rgba(0,0,0,.18);max-width:min(90vw,500px);text-align:center;font-size:13px}
.modal-backdrop{position:fixed;inset:0;background:rgba(22,45,61,.45);backdrop-filter:blur(4px);z-index:40;display:grid;place-items:center;padding:20px}.modal{background:white;border-radius:22px;padding:clamp(22px,4vw,36px);width:min(100%,520px);max-height:calc(100vh - 40px);overflow:auto;box-shadow:0 28px 80px rgba(19,45,63,.25)}.modal h2{margin-bottom:8px}.modal-close{float:right;background:#eef3f6;border:0;width:32px;height:32px;border-radius:50%;font-size:18px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}.choice{min-height:190px;text-align:left;border:1px solid var(--line);background:#fff;border-radius:16px;padding:21px;display:flex;flex-direction:column;align-items:start;gap:10px}.choice:hover{border-color:var(--blue);background:#f5f8ff}.choice strong{font-size:19px}.choice small{font-size:12px;line-height:1.5}.choice-icon{font:700 31px Georgia,serif;color:var(--blue)}
.admin-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 23px}.admin-tab{border:1px solid var(--line);border-radius:10px;background:#fff;padding:9px 13px;color:var(--ink)}.admin-tab.active{background:var(--ink);color:#fff}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:13px}.simple-table{border-collapse:collapse;width:100%;font-size:13px}.simple-table th,.simple-table td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);white-space:nowrap}.simple-table th{background:#f2f6f8;color:#657987;font-size:11px;letter-spacing:.06em}.simple-table tr:last-child td{border-bottom:0}.code-box{background:#edf2ff;border:1px dashed #9bb3e9;padding:15px;border-radius:12px;font:600 14px ui-monospace,monospace;word-break:break-all}
@media(max-width:1050px){.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-2{grid-template-columns:1fr}.content-split{grid-template-columns:1fr}.hero-ticket{width:170px;height:210px}.daily-hero{grid-template-columns:1fr 180px}.topbar{gap:12px}.nav-link{padding:10px 11px}}
@media(max-width:700px){.topbar{height:61px;padding:0 17px}.brand-name{font-size:20px}.brand-sub{font-size:9px}.logo-mark{width:33px;height:33px;font-size:19px}.topnav{display:none}.account-pill{font-size:11px;padding:8px 11px;max-width:105px}.top-actions{margin-left:auto}.site-main{padding:23px 16px 98px}.demo-bar{font-size:10px;padding:7px 12px}.bottom-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:6px 8px calc(6px + env(safe-area-inset-bottom));z-index:30}.bottom-nav button{background:transparent;border:0;border-radius:9px;padding:8px 2px 6px;color:#768793;font-size:11px;font-weight:700}.bottom-nav button.active{color:var(--blue);background:#edf2ff}.bottom-nav b{display:block;font-size:18px;line-height:1.2;margin-bottom:2px}.page-header{align-items:start}.mini-date{display:none}.page-header h1{font-size:2.1rem}.daily-hero{display:block;min-height:325px;padding:25px}.daily-hero h2{font-size:2.3rem}.daily-hero .subtle{font-size:13px}.hero-ticket{display:none}.metrics{gap:7px;margin:13px 0}.metric{padding:15px 11px}.metric strong{font-size:23px}.metric span{font-size:10px}.panel{padding:21px}.catalog-grid{grid-template-columns:1fr;gap:10px}.catalog-card{min-height:145px;padding:17px}.catalog-card h3{margin:10px 0 4px;font-size:18px}.catalog-card p{margin-bottom:7px}.section-head{margin:33px 0 13px}.task-item{padding:13px;gap:10px}.task-item .btn{padding:8px;min-height:38px;font-size:11px}.task-symbol{width:37px;height:37px;font-size:21px}.practice-card{min-height:calc(100dvh - 210px);padding:25px 18px}.practice-main{margin-top:24px}.practice-main h1{font-size:3.3rem}.practice-main .meaning{font-size:1.8rem}.answer-input{min-height:112px;font-size:30px}.cover-slip{min-height:78px}.practice-actions{margin-top:23px}.practice-actions .btn{min-width:0;flex:1}.practice-top{align-items:start;top:61px}.choice-grid{grid-template-columns:1fr}.choice{min-height:130px}.inline-fields{grid-template-columns:1fr}.result-numbers{gap:5px}.result-numbers div{padding:13px 7px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}