@charset "UTF-8";
:root{--ink:#183e38;--muted:#677c77;--green:#147b64;--deep:#0b5947;--lime:#e5f4b9;--paper:#f5f8f5;--line:#dce7df;--yellow:#ffd778;--red:#b93646;--shadow:0 8px 28px #164b3510}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;line-height:1.6}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0}button:disabled{cursor:default;opacity:.45}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #efad37;outline-offset:4px}header{height:90px;background:#fff;border-bottom:1px solid var(--line)}.header-inner{max-width:1180px;padding:0 28px;margin:auto;height:100%;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;place-items:center;background:var(--green);color:#fff;font-size:28px;font-weight:900;width:47px;height:47px;border-radius:16px;transform:rotate(-7deg)}.brand b{font-size:22px;letter-spacing:.3px}.brand small{display:block;font-size:12px;letter-spacing:2px;color:var(--muted);margin-top:-4px}#top-nav{display:flex;gap:6px}.nav-item{padding:11px 16px;border-radius:12px;font-size:15px;color:var(--muted);display:flex;gap:7px;align-items:center}.nav-item.active{background:#e7f3eb;color:var(--deep);font-weight:bold}.icon{width:20px;height:20px;display:inline-block;vertical-align:middle;flex-shrink:0}.edition{border:1px solid var(--line);border-radius:30px;padding:5px 13px;font-size:12px;color:var(--muted);white-space:nowrap}main{max-width:1180px;margin:auto;padding:34px 28px 20px;min-height:calc(100vh - 165px)}.eyebrow{font-size:12px;letter-spacing:2px;font-weight:bold;color:var(--green);margin:0 0 7px}.page-heading{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:24px}h1{font-size:28px;margin:0;line-height:1.35;letter-spacing:-.7px}h2{font-size:21px;margin:0}h3{font-size:17px;margin:0}p{margin:8px 0}.muted{color:var(--muted);font-size:14px}.home-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:24px}.hero{min-height:300px;position:relative;overflow:hidden;background:#d7edf2;border-radius:26px;padding:34px;isolation:isolate}.hero-art{position:absolute;height:100%;width:62%;object-fit:cover;right:0;bottom:0;z-index:-2;mask-image:linear-gradient(to right,transparent,#000 24%)}.hero h2{font-size:34px;line-height:1.4;max-width:350px}.hero p{color:#34685b;max-width:295px;font-size:15px}.hero .btn{margin-top:22px}.hero-label{display:inline-block;background:#ffffffbb;border:1px solid #fff;border-radius:30px;padding:4px 12px;font-size:12px;margin-bottom:16px;color:var(--deep)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:11px 23px;border-radius:14px;background:var(--green);color:#fff;font-weight:bold;box-shadow:0 4px 0 var(--deep);transition:transform .15s}.btn:hover{background:#106b57;transform:translateY(-1px)}.btn:active{transform:translateY(2px);box-shadow:0 1px 0 var(--deep)}.btn.secondary{color:var(--green);background:#e9f4ee;box-shadow:0 3px 0 #ccdfd3}.btn.gold{background:var(--yellow);color:#644306;box-shadow:0 4px 0 #e2b356}.btn.small{min-height:40px;padding:7px 15px;font-size:14px}.btn.flat{box-shadow:none}.panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:23px;box-shadow:var(--shadow)}.daily{display:flex;flex-direction:column;gap:18px}.daily-header{display:flex;align-items:center;justify-content:space-between}.mini-badge{background:#fff3d4;color:#875514;border-radius:8px;padding:2px 9px;font-size:12px}.task-line{display:flex;gap:12px;align-items:center;font-size:14px}.check{width:30px;height:30px;display:grid;place-items:center;background:#f0f4f0;border-radius:50%;font-weight:bold;color:#81928b}.check.done{background:var(--green);color:#fff}.task-line small{display:block;color:var(--muted);font-size:12px}.progress{height:8px;background:#edf2ed;border-radius:12px;overflow:hidden}.progress span{display:block;height:100%;background:var(--green);border-radius:12px}.daily .btn{margin-top:auto}.section-head{display:flex;align-items:center;justify-content:space-between;margin:28px 0 15px}.text-button{background:none;color:var(--green);font-size:14px;padding:5px}.island-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.island{background:#fff;border:1px solid var(--line);border-radius:19px;padding:19px 15px;text-align:left;transition:transform .15s,box-shadow .15s;color:var(--ink)}.island:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.island-number{font-family:Georgia,serif;font-size:28px;font-weight:bold;color:var(--green);display:block}.island:nth-child(2) .island-number{color:#c37d20}.island:nth-child(3) .island-number{color:#448ac3}.island:nth-child(4) .island-number{color:#82984a}.island:nth-child(5) .island-number{color:#a274b3}.island h3{font-size:15px;margin:10px 0 7px}.island .progress{margin-top:14px;height:5px}.bottom-panels{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}.inline-panel{display:flex;gap:18px;align-items:center;padding:20px 23px}.round-icon{border-radius:16px;background:#edf4d9;color:var(--green);padding:15px;flex-shrink:0}.round-icon .icon{width:27px;height:27px}.inline-panel .text-button{margin-left:auto;white-space:nowrap}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px}.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:15px 20px}.stat b{display:block;font-size:26px;line-height:1.2}.stat span{font-size:13px;color:var(--muted)}.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}.search{flex:1;min-width:180px}input,select{background:#fff;border:1px solid #cedcd1;border-radius:12px;padding:12px 15px;color:var(--ink);min-height:48px}input{width:100%}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.chip{background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:30px;font-size:14px;color:var(--muted)}.chip.active{background:var(--green);color:#fff;border-color:var(--green)}.word-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.word-tile{position:relative;padding:17px 18px;border-radius:15px;text-align:left;background:#fff;border:1px solid var(--line);border-left:4px solid #c2cfca;color:var(--ink)}.word-tile b{display:block;font-family:Arial,sans-serif;font-size:21px;overflow-wrap:anywhere}.word-tile .meaning{display:block;font-size:14px;margin-top:3px}.word-tile .word-foot{margin-top:12px;display:flex;align-items:center;justify-content:space-between;gap:5px;font-size:12px}.word-tile.red{background:#fff3f3;border-left-color:#d65865}.word-tile.yellow{background:#fffbec;border-left-color:#e3ac34}.word-tile.green{background:#eff9f0;border-left-color:#4b9c69}.status{display:inline-flex;align-items:center;gap:5px;font-size:12px;white-space:nowrap}.status:before{content:"";width:7px;height:7px;border-radius:50%;background:#adbeb5}.status.red{color:#a62e42}.status.red:before{background:#d65865}.status.yellow{color:#936305}.status.yellow:before{background:#e3ac34}.status.green{color:#297645}.status.green:before{background:#4b9c69}.word-note{font-size:11px;color:var(--muted)}.empty{text-align:center;padding:50px 20px;color:var(--muted);background:#fff;border-radius:20px;border:1px dashed var(--line)}.pagination{display:flex;gap:15px;align-items:center;justify-content:center;margin:25px 0}.study-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:24px}.category-list{display:flex;flex-direction:column;gap:9px}.category-list button{background:#fff;border:1px solid var(--line);color:var(--ink);border-radius:14px;padding:13px 15px;text-align:left}.category-list button.active{background:#e1f0e6;border-color:var(--green);color:var(--deep)}.study-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:28px;text-align:center;box-shadow:var(--shadow)}.study-top{display:flex;justify-content:space-between;gap:15px;color:var(--muted);font-size:14px}.word-stage{padding:26px 0 20px}.word-big{font-family:Arial,sans-serif;font-size:clamp(38px,7vw,64px);font-weight:800;letter-spacing:-1px;line-height:1.25;margin:14px 0}.word-cn{font-size:22px;min-height:40px}.sound-row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:15px 0}.audio-btn{display:inline-flex;gap:8px;align-items:center;background:#eff6ef;color:var(--green);border:1px solid #d7e7d9;border-radius:30px;min-height:46px;padding:9px 17px;font-size:14px}.example{border-top:1px solid var(--line);padding:20px 0;font-family:Arial,"Microsoft YaHei",sans-serif;font-size:20px}.study-bottom{display:flex;justify-content:center;gap:15px;flex-wrap:wrap;padding-top:15px;border-top:1px solid var(--line)}.study-steps{display:flex;gap:8px;justify-content:center;margin-bottom:20px}.study-step{width:32px;height:32px;background:#fff;border:1px solid var(--line);border-radius:50%;color:var(--muted);font-size:13px}.study-step.active{background:var(--green);color:#fff}.tag{display:inline-block;background:#f0f5e5;color:#527832;border-radius:8px;font-size:12px;padding:4px 10px}.quiz-select{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.game-card{padding:30px 24px;border:1px solid var(--line);background:#fff;border-radius:22px}.game-card h2{margin:19px 0 7px}.game-card .round-icon{display:inline-flex}.game-card .btn{width:100%;margin-top:20px}.quiz-shell{max-width:750px;margin:auto}.quiz-card{padding:35px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:25px;margin-top:20px}.quiz-question{font-size:26px;line-height:1.5;margin:20px 0}.options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:25px 0}.option{min-height:65px;background:#f8faf7;border:2px solid #e1e9e0;border-radius:15px;padding:15px;color:var(--ink);font-size:19px}.option.correct{background:#e3f4e6;border-color:#48905c;color:#266438;opacity:1}.option.wrong{background:#fff0f0;border-color:#d5606c;color:#ab3546;opacity:1}.feedback{border-radius:14px;background:#eaf5ec;padding:17px;margin-top:20px;text-align:left}.feedback.bad{background:#fff0ef}.feedback p{font-size:14px}.letter-tray,.answer-slots{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin:23px 0;min-height:52px}.letter{width:45px;min-height:49px;border-radius:10px;background:#e9f3ec;border:1px solid #b6d5c1;color:var(--deep);font-family:Arial,sans-serif;font-size:24px;font-weight:bold}.answer-slots .letter{background:#fff7df;border-color:#e7ca80}.letter:disabled{opacity:.22}.large-score{font-size:66px;color:var(--green);font-weight:bold;line-height:1.2;margin:24px}.calendar-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(260px,1fr);gap:24px}.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;text-align:center}.weekday{font-size:13px;color:var(--muted);padding:10px 0}.day{aspect-ratio:1.2;display:flex;align-items:center;justify-content:center;border-radius:13px;background:#f3f6f2;position:relative;font-size:15px}.day.today{outline:2px solid var(--green);outline-offset:-2px}.day.checked{background:var(--green);color:#fff;font-weight:bold}.day.future{color:#aeb9b1}.calendar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.calendar-head button{background:#eff5ef;border-radius:9px;width:38px;height:38px}.stamp-list{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.stamp{width:66px;height:66px;border-radius:50%;display:grid;place-items:center;background:#f0f2ed;color:#929e95;border:2px dashed #d3dbd0;font-size:13px}.stamp.earned{background:#fff2c9;color:#916118;border:2px solid #e6c061}.notice{background:#eef4ef;border-radius:12px;padding:13px 16px;color:#587266;font-size:13px;margin:15px 0}.notice.warn{background:#fff5df;color:#845b15}footer{max-width:1180px;margin:0 auto;padding:20px 28px 26px;font-size:12px;color:var(--muted);display:flex;justify-content:center;gap:15px;align-items:center;flex-wrap:wrap}footer button{font-size:12px!important}#bottom-nav{display:none}dialog{border:0;border-radius:23px;padding:27px;max-width:560px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 20px 100px #07332340}dialog::backdrop{background:#123b3455;backdrop-filter:blur(4px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.close-button{width:38px;height:38px;border-radius:50%;background:#eef3ed;font-size:24px;color:var(--muted)}.skill-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}#toast{position:fixed;left:50%;bottom:35px;transform:translateX(-50%);z-index:20;background:#163c33;color:#fff;max-width:calc(100% - 32px);padding:12px 20px;border-radius:13px;font-size:14px;box-shadow:0 4px 25px #0002;display:none}#toast.show{display:block}.hidden{display:none!important}.legend{display:flex;gap:18px;flex-wrap:wrap;margin:15px 0}.results-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:15px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(max-width:1000px){#top-nav .icon{display:none}.nav-item{padding:10px}.header-inner{gap:14px}.home-layout{grid-template-columns:minmax(0,1fr) 255px}.hero{padding:27px}.hero h2{font-size:29px}.island-grid{gap:10px}.island{padding:16px 12px}.word-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.edition{display:none}}
@media(max-width:740px){header{height:72px}.header-inner{padding:0 20px}.brand-mark{width:39px;height:39px;font-size:23px}.brand b{font-size:20px}.brand small{font-size:11px}.edition{display:block;font-size:11px;padding:4px 10px}#top-nav{display:none}main{padding:23px 18px 12px;min-height:calc(100vh - 190px)}h1{font-size:24px}.page-heading{margin-bottom:18px;align-items:center}.page-heading>.muted{display:none}.home-layout{grid-template-columns:1fr;gap:16px}.hero{min-height:265px;padding:25px}.hero h2{font-size:29px;max-width:230px}.hero p{max-width:200px}.hero-art{width:64%;opacity:.85}.hero .btn{margin-top:17px}.daily{gap:14px;padding:19px}.daily .tasks{display:flex;gap:20px}.daily .btn{min-height:43px}.island-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.island:last-child{grid-column:1 / -1}.island{padding:16px 18px}.island-number{font-size:25px}.island h3{margin:5px 0}.bottom-panels{grid-template-columns:1fr;gap:12px;margin-top:18px}.inline-panel{padding:18px}.section-head{margin-top:24px}.stats{grid-template-columns:repeat(2,1fr);gap:10px}.stat{padding:13px 16px}.stat b{font-size:23px}.word-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.word-tile{padding:14px 12px}.word-tile b{font-size:20px}.word-foot{flex-wrap:wrap}.toolbar{gap:9px}.toolbar select{flex:1;min-width:0;font-size:14px;padding:11px}.search{flex-basis:100%}.chips{gap:7px}.chip{font-size:13px;padding:7px 12px}.study-layout{grid-template-columns:1fr;gap:17px}.category-list{flex-direction:row;overflow-x:auto;padding-bottom:4px}.category-list button{white-space:nowrap;font-size:13px;padding:9px 13px}.study-card{padding:21px 16px}.word-stage{padding:16px 0}.word-big{font-size:44px}.example{font-size:18px}.study-bottom{gap:10px}.study-bottom .btn{padding:10px 15px}.quiz-select{grid-template-columns:1fr;gap:15px}.game-card{padding:23px}.game-card h2{margin-top:12px}.game-card .btn{margin-top:14px}.quiz-card{padding:23px 16px}.options{gap:10px}.option{font-size:17px;min-height:62px;padding:12px}.calendar-layout{grid-template-columns:1fr;gap:17px}.calendar-grid{gap:6px}.panel{padding:20px}.day{border-radius:10px}.letter{width:38px;min-height:45px;font-size:23px}.answer-slots,.letter-tray{gap:6px}.quiz-question{font-size:23px}footer{padding:18px 20px 105px;font-size:11px;gap:6px}#bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:10;background:#ffffffed;backdrop-filter:blur(12px);border-top:1px solid var(--line);justify-content:space-around;padding:8px 4px calc(8px + env(safe-area-inset-bottom))}.nav-item{flex-direction:column;gap:3px;font-size:11px;padding:5px 11px;border-radius:11px}.nav-item .icon{width:21px;height:21px}#toast{bottom:95px}.legend{gap:12px}.legend .status{font-size:11px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.brand-avatar{width:56px;height:56px;object-fit:contain;flex-shrink:0}@media(max-width:740px){.brand-avatar{width:48px;height:48px}}
.study-steps{flex-wrap:wrap}@media(max-width:740px){#word-scope{flex-basis:100%}}
.example:has(span:empty){display:none}
.auth-shell{position:fixed;inset:0;z-index:100;background:linear-gradient(145deg,#e9f5ef,#d9edf2);display:grid;place-items:center;padding:20px;overflow:auto}.auth-card{width:min(440px,100%);background:#fff;border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:0 25px 80px #164b3530;text-align:center}.auth-card>img{width:92px;height:92px;object-fit:contain}.auth-card form,.account-form{display:grid;gap:14px;text-align:left;margin:22px 0}.auth-card label,.account-form label{display:grid;gap:5px;font-size:14px;color:var(--muted)}.auth-card .btn,.account-form .btn{width:100%;margin-top:5px}.auth-error{color:var(--red);font-size:14px;min-height:22px}.account-button{border:1px solid var(--line);border-radius:30px;background:#fff;color:var(--green);padding:7px 13px;white-space:nowrap}.account-dialog{max-width:760px}.admin-create{padding:16px;background:#f4f8f4;border-radius:16px;margin:15px 0}.inline-form{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.inline-form select{flex:1;min-width:160px}.admin-users{display:grid;gap:9px;margin-top:14px;max-height:420px;overflow:auto}.admin-users article{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:14px;padding:12px 14px}.admin-users article>div{flex:1}.admin-users small{display:block;color:var(--muted)}
@media(max-width:740px){.account-button{font-size:12px;padding:6px 9px}.auth-card{padding:24px 20px}.admin-users article{align-items:flex-start;flex-wrap:wrap}.inline-form{display:grid}.inline-form select{width:100%}}