*{box-sizing:border-box}:root{font-family:ui-rounded,PingFang SC,Microsoft YaHei,sans-serif;color:#273e35;background:#f7f7f2;font-synthesis:none;line-height:1.6}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit;min-height:44px}button:disabled{cursor:default;opacity:.58}button:focus-visible,a:focus-visible{outline:3px solid #b96324;outline-offset:4px}button{transition:background .18s,transform .18s}button:not(:disabled):active{transform:translateY(1px)}h1,h2,h3,p{margin:0}h1{font-size:32px;line-height:1.45;margin:8px 0}h2{font-size:20px;line-height:1.5}h3{font-size:21px;line-height:1.6}p{color:#63705f;line-height:1.85;font-size:14px;margin:8px 0}strong{font-weight:750}.shell{max-width:1160px;padding:0 32px;margin:auto}header{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:26px 0;border-bottom:1px solid #dfe3d6}.brand{display:flex;align-items:center;gap:12px;background:none;border:0;padding:0;font-size:23px;font-weight:800;white-space:nowrap}.logo{background:#55794c;color:#fff;padding:6px 12px;border-radius:14px;transform:rotate(-6deg)}nav{display:flex;gap:16px}nav button{background:none;border:0;border-bottom:2px solid transparent;color:#63705f;padding:8px 5px;font-size:14px}nav button[aria-current]{color:#486948;border-bottom-color:#55794c;font-weight:700}.grade{padding:8px 14px;background:#eeeede;border-radius:22px;font-size:13px;white-space:nowrap}.intro{display:flex;justify-content:space-between;align-items:end;margin:34px 0 22px;gap:16px}.eyebrow{letter-spacing:2px;font-size:12px;color:#596c4e;font-weight:700}.pill{border:1px solid #d9decd;padding:9px 15px;border-radius:20px;font-size:12px;color:#63705f;white-space:nowrap}.hero{background:#e9eddb;border-radius:25px;padding:32px 38px;display:grid;grid-template-columns:1.25fr 1fr;overflow:hidden;min-height:270px}.hero h2{font-size:30px;margin:11px 0;line-height:1.5}.tag{color:#587047;font-size:12px;letter-spacing:1.5px}.primary{background:#55794c;border:1px solid #55794c;color:#fff;padding:13px 23px;border-radius:12px;font-weight:700;box-shadow:0 3px #3b5d36}.primary:not(:disabled):hover{background:#46663e}.hero .primary{margin-top:14px}.secondary{border:1px solid #d6ddcc;background:#fffdf8;border-radius:10px;padding:9px 16px;color:#48633e}.secondary:not(:disabled):hover{background:#edf1e3}.hero-art{display:flex;align-items:center;justify-content:center;gap:12px;transform:rotate(-5deg)}.char{background:#fffdf5;border:1px solid #e2dec9;border-radius:15px;box-shadow:0 9px #d7dcc4;width:104px;text-align:center;padding:15px 0;color:#465f40}.char small{display:block;font-size:14px;color:#627349}.char strong{font:66px Kaiti SC,KaiTi,serif}.char:nth-child(2){transform:translateY(-23px) rotate(10deg);background:#ffedb5}.char:nth-child(3){transform:translateY(13px) rotate(3deg)}.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:28px;margin:28px 0 44px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px}.muted{font-size:12px;color:#62705c}.modules{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.module{border:1px solid #e0e4d6;background:#fff;border-radius:18px;text-align:left;padding:23px;display:flex;gap:16px}.module:hover{transform:translateY(-3px);border-color:#9eaf8d}.tile{width:52px;height:55px;flex-shrink:0;display:grid;place-items:center;border-radius:14px;font:27px KaiTi,serif;background:#edf1e1;color:#526e47}.module:nth-child(2) .tile{background:#fcf0d9;color:#8c6229}.module:nth-child(3) .tile{background:#eee8f5;color:#78558b}.module:nth-child(4) .tile{background:#e7f0f6;color:#426b81}.module strong{display:block;font-size:17px;margin:2px 0 6px}.module-desc{display:block;font-size:12px;color:#63705f}.mini{display:block;font-size:11px;color:#63705f;margin-top:12px}.aside{background:#fffdf7;border:1px solid #e3e2d4;border-radius:18px;padding:23px}progress{display:block;width:100%;height:9px;border:0;border-radius:10px;background:#ecebdf;margin:20px 0 10px;overflow:hidden}progress::-webkit-progress-bar{background:#ecebdf}progress::-webkit-progress-value{background:#78975d;border-radius:10px}progress::-moz-progress-bar{background:#78975d}.goal{font-size:13px}.check{margin-top:16px;font-size:13px}.encourage{border-top:1px solid #e5e5d9;padding-top:18px;margin-top:18px}.detail-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:28px 0 22px}.detail-title{font-size:26px}.lesson{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px;margin:20px 0 28px}.writing,.meaning{border-radius:23px;border:1px solid #e1e5d7;background:#fff;padding:26px;text-align:center}.pinyin{font-size:26px;color:#587047;margin:12px 0}.writing-grid{width:230px;height:230px;margin:18px auto;background:linear-gradient(45deg,transparent 49.7%,#eee9df 50%,transparent 50.3%),linear-gradient(-45deg,transparent 49.7%,#eee9df 50%,transparent 50.3%),linear-gradient(to right,transparent 49.6%,#e4dccc 50%,transparent 50.4%),linear-gradient(to bottom,transparent 49.6%,#e4dccc 50%,transparent 50.4%);outline:2px solid #e5ddcd}.media-status{font-size:12px;color:#63705f;margin:10px 0;min-height:24px}.media-status button{background:none;border:0;text-decoration:underline}.illustration{margin:0;position:relative;min-height:210px;background:#f2eee0;border-radius:15px;overflow:hidden;display:grid;place-items:center}.illustration img{display:block;width:100%;height:240px;object-fit:cover}.illustration figcaption{padding:20px;color:#63705f;font-size:14px}.illustration:has(img) figcaption{position:absolute;bottom:0;background:#fffdf5eb;width:100%;padding:10px}.meaning h2{margin:20px 0 8px;font-size:21px}.meaning .speech{margin-top:16px}.examples{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.example{background:#fffdf7;border:1px solid #e2e4d6;border-radius:16px;padding:22px}.example h3{margin:12px 0}.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:start;margin-top:18px}.speech p{max-width:320px;font-size:12px}.lesson-controls{display:flex;justify-content:center;gap:18px;margin:26px 0 12px}.center{text-align:center}.text-button{border:0;background:transparent;color:#48633e;padding:0;text-align:left}.page-intro{margin:26px 0}.character-list{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}.character-card{background:#fffdf7;border:1px solid #dfe4d4;border-radius:17px;padding:20px 8px;display:flex;align-items:center;flex-direction:column}.character-card:hover{border-color:#81976c;transform:translateY(-3px)}.character-card .pinyin{font-size:18px;margin:0}.character-card strong{font:62px Kaiti SC,KaiTi,serif;color:#425e3b;margin:8px 0}.character-card>span:last-child{font-size:12px;color:#63705f}.filters{display:flex;gap:10px;margin-bottom:24px}.filters [aria-pressed=true]{background:#55794c;color:#fff;border-color:#55794c}.empty{text-align:center;border:1px dashed #c1ccb4;padding:50px 20px;border-radius:18px}.empty .primary{margin-top:16px}.reading-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.reading-list.stories{grid-template-columns:repeat(2,minmax(0,1fr))}.reading-card{background:#fffdf8;border:1px solid #dfe4d6;padding:25px;border-radius:18px;display:flex;flex-direction:column}.reading-card h2{font-size:24px;margin-top:12px}.reading-card .actions{margin-top:auto;padding-top:16px}.word-pinyin{color:#55794c;font-size:16px}.definition{font-weight:650;color:#3b5140}.quiz{background:#e9eddb;padding:28px;border-radius:22px;margin:30px 0;text-align:center}.quiz-pinyin{font-size:34px;color:#48633e;margin:16px}.quiz-options{display:flex;gap:16px;justify-content:center}.quiz-options button{font:38px KaiTi,serif;min-width:76px;min-height:70px}.quiz>p{margin:14px 0}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.stats article{background:#e9eddb;border-radius:18px;padding:24px}.stats strong{font-size:42px;color:#55794c}.stats h2{font-size:17px}.history{margin-top:28px}.history-row{padding:18px 0;border-bottom:1px solid #e2e5d7;display:flex;gap:30px;flex-wrap:wrap}.history button{margin-top:20px}.notice{background:#fff0d8;border:1px solid #dbc59c;border-radius:12px;padding:14px 18px;margin-top:18px;color:#74451c;font-size:14px}footer{text-align:center;color:#63705f;font-size:12px;line-height:2;padding:30px 0;margin-top:28px;border-top:1px solid #e0e4d6}.skip{position:absolute;top:-80px;background:#fff;padding:12px;z-index:10;color:#273e35}.skip:focus{top:8px}main:focus{outline:none}main{animation:arrive .3s ease-out}@keyframes arrive{0%{opacity:.7;transform:translateY(5px)}to{opacity:1;transform:none}}@media(max-width:900px){.grade{display:none}.module{padding:18px 14px;gap:12px}.character-list{grid-template-columns:repeat(4,minmax(0,1fr))}.reading-list{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding:28px}.char{width:88px}.layout{gap:18px;grid-template-columns:minmax(0,1fr) 235px}.module-desc,.mini{font-size:12px}}@media(max-width:650px){.shell{padding:0 18px}header{flex-wrap:wrap;gap:14px;padding:20px 0 12px}.brand{font-size:21px}nav{width:100%;gap:8px;justify-content:space-between}nav button{padding:8px 12px;font-size:14px}.intro{margin-top:26px}.intro .pill{display:none}.eyebrow{font-size:11px;letter-spacing:1px}h1{font-size:25px}.hero{grid-template-columns:minmax(0,1fr);padding:25px}.hero h2{font-size:26px}.hero-art{margin:45px 0 20px}.char{width:80px}.char strong{font-size:54px}.layout,.lesson{grid-template-columns:1fr}.layout{margin-top:24px;gap:22px}.section-head{flex-wrap:wrap;gap:4px}.section-head h2{font-size:19px}.modules{gap:12px}.module{flex-direction:column;padding:18px 13px;gap:10px}.module strong{font-size:16px}.module-desc{font-size:13px}.mini{font-size:12px}.tile{width:43px;height:44px;font-size:25px}.aside{padding:22px}.character-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.character-card{padding:16px 5px}.character-card strong{font-size:52px}.character-card>span:last-child{font-size:11px}.reading-list,.reading-list.stories,.examples,.stats{grid-template-columns:1fr}.reading-card{padding:22px}.reading-card h2{font-size:23px}.writing,.meaning{padding:22px 16px}.meaning h2{font-size:20px}.lesson-controls{gap:9px}.lesson-controls button{padding:10px 14px}.detail-head .muted{font-size:11px}.quiz{padding:22px 16px}.quiz .section-head{justify-content:center}.quiz .section-head span{font-size:13px}.quiz-options button{min-width:70px}.history-row{gap:8px 20px}.stats{gap:12px}.stats article{display:flex;align-items:center;gap:22px;padding:18px 24px}.illustration img{height:210px}.speech p{font-size:13px}footer{font-size:11px}.muted{font-size:12px}}.mini{line-break:anywhere}@media(min-width:651px)and (max-width:656px){.lesson{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.module:hover,.character-card:hover{transform:none}}