:root{color-scheme:light;--ink:#382d36;--muted:#897680;--rose:#bc416b;--rose-dark:#a92f5a;--line:#eedfe4;--bg:#fbf7f8;--soft:#f9e9ee;--white:#fff;--green:#328672}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;-webkit-font-smoothing:antialiased}button,input,a{font:inherit}button{cursor:pointer}button:disabled{opacity:.38;cursor:not-allowed}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #e890ae;outline-offset:3px}[hidden]{display:none!important}.hanzi{font-family:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif}.wrapper{width:min(1120px,calc(100% - 64px));margin:auto}.ti{font-size:20px;line-height:1;flex-shrink:0}
.topbar{background:rgba(255,255,255,.82);border-bottom:1px solid #f0e7e9}.topbar-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:11px}.brand-logo{width:40px;height:40px;display:block}.brand-text strong{display:block;font-size:15px;line-height:1.2;font-weight:750;letter-spacing:-.3px}.brand-text small{display:block;margin-top:3px;color:#aa8d99;font-size:11px}.top-actions{display:flex;gap:8px}.top-link{display:flex;align-items:center;gap:7px;border:1px solid transparent;padding:9px 11px;border-radius:11px;color:#836774;font-size:12px;font-weight:650}.top-link:hover{background:#f9f0f3;border-color:#f0dfe5}.top-link .ti{font-size:18px}
.intro{position:relative;display:flex;justify-content:space-between;align-items:center;padding:45px 0 23px;overflow:hidden}.intro-eyebrow,.section-kicker{display:flex;align-items:center;gap:8px;font-size:10px;font-weight:800;letter-spacing:.13em;color:#bc6684}.intro-dot{width:7px;height:7px;border-radius:50%;background:#d75d84}.intro h1{font-size:clamp(32px,4vw,47px);font-weight:750;letter-spacing:-.055em;line-height:1.12;margin:12px 0 9px}.intro h1 span{color:#c24e75}.intro p{margin:0;color:#8b7781;font-size:14px}.intro-mark{font-size:108px;color:#efd6df;line-height:1;font-weight:600;padding-right:30px}.intro-mark span{font-family:Arial;font-size:25px;color:#daa0b3;vertical-align:top}
.statbar{display:flex;align-items:center;border:1px solid #f1dfe5;border-radius:16px;background:#fff;min-height:74px;padding:14px 21px;gap:0}.stat{display:flex;align-items:baseline;gap:9px;padding:0 26px;border-right:1px solid #f2e7eb}.stat:first-child{padding-left:0}.stat-num{font-size:25px;font-weight:750;letter-spacing:-.05em;color:#a93b61;line-height:1}.stat-label{font-size:12px;color:#99838d;white-space:nowrap}.stat-note{margin-left:auto;color:#b78094;font-size:12px}.stat-note .ti{vertical-align:middle;margin-right:5px;font-size:16px}.section-header{display:flex;justify-content:space-between;align-items:end;margin:45px 0 18px}.section-header h2{font-size:26px;letter-spacing:-.045em;line-height:1.2;margin:6px 0 0}.soft-tag{color:#b87990;font-size:12px}.soft-tag .ti{font-size:17px;vertical-align:middle}
.control-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px}.toolbar{display:flex;align-items:center;gap:16px;justify-content:space-between}.tabs{display:flex;align-items:center;gap:4px;overflow-x:auto;white-space:nowrap;min-width:0;max-width:100%;scrollbar-width:thin}.tab{flex:0 0 auto;border:0;background:none;color:#917c86;padding:10px 16px;border-radius:10px;font-size:13px;font-weight:650;min-height:42px}.tab:hover{background:#fbf1f4}.tab[aria-selected=true]{background:#f7e5eb;color:#a93560}.search-wrap{position:relative;min-width:220px;max-width:300px;flex:1}.search-wrap>.ti{position:absolute;left:13px;top:50%;transform:translateY(-50%);font-size:19px;color:#b99aa8;pointer-events:none}.search-wrap input{width:100%;height:44px;border:1px solid #f0e4e8;border-radius:10px;background:#fcfafb;padding:0 12px 0 40px;color:var(--ink);font-size:13px}.search-wrap input:focus{background:#fff;border-color:#e2a5b9;outline:2px solid #fae9ef}.subtoolbar{border-top:1px solid #f5ebee;margin-top:10px;padding-top:10px;display:flex;align-items:center;justify-content:space-between;gap:10px}.switches{display:flex;gap:6px;flex-wrap:wrap}.filter-note{font-size:11px;color:#ae97a1}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:42px;padding:9px 13px;border-radius:10px;background:#fff;border:1px solid #eee0e5;color:#866477;font-size:12px;font-weight:700;transition:background .18s,border-color .18s}.btn .ti{font-size:18px}.btn:hover{background:#fcf1f5;border-color:#e7bdca}.btn[aria-pressed=true]{background:#f8e7ed;color:#a8335d;border-color:#edccd7}.btn.primary{background:#b63f68;color:#fff;border-color:#b63f68}.btn.primary:hover{background:#9f3058}.btn.ghost{background:transparent;border-color:transparent}.icon-btn{display:inline-grid;place-items:center;width:44px;height:44px;border:0;background:#f9eef2;border-radius:12px;color:#b8496f}.icon-btn:hover{background:#f3e0e7}
.lesson-heading{display:flex;align-items:end;justify-content:space-between;gap:15px;margin:32px 0 15px}.lesson-heading h3{margin:0;font-size:18px;letter-spacing:-.025em}.lesson-heading p{margin:4px 0 0;font-size:12px;color:#a18a95}.lesson-heading strong{font-size:11px;color:#b0788c;white-space:nowrap}.word-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.word-card{background:white;border:1px solid #f0e4e8;border-radius:17px;padding:18px 19px 14px;display:flex;flex-direction:column;min-width:0;transition:border-color .2s,box-shadow .2s}.word-card:hover{border-color:#e6bfcd;box-shadow:0 10px 30px #6c35480a}.word-card.is-known{border-color:#cbe8dc}.word-top{display:flex;align-items:center;justify-content:space-between;min-height:22px}.word-number{font-size:10px;letter-spacing:.09em;color:#bba1ac;font-weight:750}.known-badge{display:flex;align-items:center;gap:3px;padding:4px 8px;background:#edf8f3;color:#328672;border-radius:7px;font-size:10px;font-weight:700}.known-badge .ti{font-size:13px}.word-main{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin:11px 0 6px}.word-hanzi{font-size:40px;line-height:1.25;font-weight:600;overflow-wrap:anywhere;letter-spacing:.01em}.word-py{color:#b85073;font-weight:650;font-size:13px;margin-top:2px}.word-vi{font-size:14px;font-weight:650;margin-top:7px;color:#59424d}.example{margin-top:auto;min-height:0}.example summary{list-style:none;display:flex;align-items:center;gap:3px;color:#a77c8c;font-size:12px;font-weight:650;cursor:pointer;min-height:39px}.example summary::-webkit-details-marker{display:none}.example summary .ti{font-size:16px;transition:transform .18s}.example[open] summary .ti{transform:rotate(180deg)}.example[open]{padding-bottom:12px}.example-ch{font-size:17px;font-weight:600}.example-vi{font-size:12px;color:#947b87;margin-top:4px}.example-audio{width:36px;height:36px;display:inline-grid;vertical-align:middle}.example-audio .ti{font-size:16px}.card-actions{display:flex;gap:7px;border-top:1px solid #f5ebee;padding-top:12px}.card-actions .btn{flex:1;min-width:0;white-space:nowrap}.card-actions .btn.done{color:#328672;background:#f1faf6;border-color:#d9eee5}.hint-hidden{border:1px dashed #e8bfce;border-radius:9px;background:#fff8fa;color:#ad5e7a;padding:8px;font-size:12px}.empty{margin-top:24px;border:1px dashed #e7ccd6;background:#fff;border-radius:16px;padding:30px;text-align:center;color:#917c86}.empty strong{display:block;color:var(--ink);font-size:16px;margin-bottom:5px}
.study-section{padding-top:0}.study-panel{max-width:650px;margin:auto;padding:25px;border:1px solid var(--line);background:#fff;border-radius:20px;text-align:center}.study-top{display:flex;justify-content:space-between;gap:8px;color:#a38c96;font-size:12px;font-weight:650}.study-word{font-size:90px;line-height:1.2;margin:25px 0 8px}.study-help{font-size:13px;color:#9c8790;margin-bottom:17px}.study-answer{min-height:96px;border-radius:14px;background:#fcf4f7;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:12px;margin-bottom:16px;color:#a57c8e}.study-answer .py{color:#b53e68;font-size:17px;font-weight:700}.study-answer .vi{color:var(--ink);font-size:17px;font-weight:700}.study-answer .sentence{margin-top:6px;font-size:12px}.study-main-actions{max-width:460px;margin:auto;display:grid;grid-template-columns:1fr 1fr;gap:8px}.study-actions{display:flex;justify-content:center;gap:4px;flex-wrap:wrap;margin-top:8px}.study-progress{height:5px;background:#f5e9ed;border-radius:10px;margin:16px auto 0;max-width:460px;overflow:hidden}.study-progress span{display:block;height:100%;background:#cf5a80;border-radius:10px}
.footer{display:flex;justify-content:space-between;gap:20px;align-items:center;border-top:1px solid var(--line);margin-top:50px;padding:20px 0 28px;color:#aa929d;font-size:11px}.foot-left{display:flex;align-items:center;gap:8px}.dot{width:6px;height:6px;background:#c9587d;border-radius:50%}.footer a{color:#b03a63;font-weight:700}.mobile-nav{display:none}.toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%,10px);background:#4a3540;color:#fff;padding:10px 15px;border-radius:10px;opacity:0;pointer-events:none;transition:.2s;z-index:100;font-size:12px}.toast.on{opacity:1;transform:translate(-50%,0)}
dialog{border:1px solid #f0e1e6;background:#fff;color:var(--ink);border-radius:20px;padding:0;width:min(830px,calc(100% - 32px));max-height:min(90dvh,850px);overflow:auto;box-shadow:0 30px 100px #3d243a35}dialog::backdrop{background:#37212e9e;backdrop-filter:blur(3px)}.modal-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:21px 24px;border-bottom:1px solid #f2e8eb}.modal-heading h2{font-size:20px;letter-spacing:-.03em;margin:0}.modal-heading p{font-size:12px;color:#9c8791;margin:3px 0 0}.modal-body{display:grid;grid-template-columns:minmax(180px,.8fr) minmax(0,1.2fr);gap:25px;padding:23px 24px}.write-info{display:flex;flex-direction:column;gap:10px}.write-word{font-size:50px;line-height:1.2;font-weight:600;overflow-wrap:anywhere}.write-py{font-size:16px;color:#b44a6e;font-weight:700}.write-vi{font-size:14px;font-weight:700}.write-sample{border-top:1px solid #f3e9ec;margin-top:8px;padding-top:12px;font-size:12px;color:#9b838d}.write-sample .hanzi{font-size:18px;color:var(--ink)}.write-note{padding:12px;border-radius:12px;background:#fcf2f5;color:#ac798e;font-size:12px}.draw-column{display:flex;flex-direction:column;gap:10px;min-width:0}.draw-bar{display:flex;align-items:center;justify-content:space-between;gap:6px;color:#a67c8d;font-size:12px}.draw-bar strong{white-space:nowrap}.mode-tabs{display:flex;gap:5px;background:#f8f2f4;padding:4px;border-radius:12px}.mode-tabs .btn{flex:1;border:0;background:transparent;padding:7px 4px}.mode-tabs .btn[aria-pressed=true]{background:#fff;color:#b33f67;box-shadow:0 2px 8px #68394b12}.writer-frame{position:relative;width:min(100%,320px);aspect-ratio:1;align-self:center;border:1px solid #ecd9e0;border-radius:15px;background:#fffbfc;overflow:hidden;flex-shrink:0}.writer-frame:before,.writer-frame:after{content:"";position:absolute;pointer-events:none}.writer-frame:before{left:50%;height:100%;border-left:1px dashed #ebd9df}.writer-frame:after{top:50%;width:100%;border-top:1px dashed #ebd9df}#writer-target{position:relative;width:100%;height:100%;touch-action:none}#writing-status{text-align:center;min-height:36px;margin:0;color:#9c6f81;font-size:12px}.draw-actions{display:flex;gap:7px}.draw-actions .btn{flex:1}.print-only{display:none}
@media(max-width:900px){.word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stat-note{display:none}}
@media(max-width:650px){body{padding-bottom:calc(72px + env(safe-area-inset-bottom))}.wrapper{width:calc(100% - 32px)}.topbar-inner{height:65px}.brand-logo{width:37px;height:37px}.brand-text strong{font-size:14px}.top-actions{gap:2px}.top-link{min-width:42px;min-height:42px;justify-content:center;padding:7px}.top-link span{display:none}.intro{padding:27px 0 19px}.intro h1{font-size:32px;margin:9px 0 6px}.intro p{font-size:12px;max-width:260px}.intro-mark{font-size:63px;padding-right:3px}.intro-mark span{font-size:16px}.intro-eyebrow{font-size:9px}.statbar{padding:13px 10px;min-height:65px}.stat{flex:1;padding:0 10px;gap:2px;display:flex;flex-direction:column;align-items:flex-start}.stat:last-of-type{border-right:0}.stat-num{font-size:21px}.stat-label{font-size:10px}.section-header{margin:28px 0 12px}.section-header h2{font-size:22px}.section-kicker{font-size:9px}.soft-tag{display:none}.control-panel{padding:10px}.toolbar{flex-direction:column;align-items:stretch;gap:8px}.tabs{width:100%;flex-wrap:nowrap;scrollbar-width:none}.tabs::-webkit-scrollbar{display:none}.tab{padding:9px 13px;font-size:12px}.search-wrap{min-width:0;max-width:none}.subtoolbar{padding-top:8px;margin-top:8px}.filter-note,.switches #study-toggle{display:none}.switches .btn{min-height:38px}.lesson-heading{margin:24px 0 12px;align-items:start}.lesson-heading h3{font-size:16px}.lesson-heading strong{font-size:10px}.word-grid{grid-template-columns:1fr;gap:10px}.word-card{padding:15px 16px 13px;border-radius:15px}.word-main{margin:5px 0}.word-hanzi{font-size:36px}.word-vi{margin-top:4px}.example summary{min-height:38px}.card-actions{padding-top:9px}.card-actions .btn{min-height:43px}.mobile-nav{position:fixed;z-index:15;bottom:0;left:0;right:0;display:flex;justify-content:space-around;background:#ffffffed;backdrop-filter:blur(14px);border-top:1px solid #f0e4e8;padding:6px 12px calc(6px + env(safe-area-inset-bottom))}.mobile-nav button{flex:1;border:0;background:none;color:#a9939d;min-height:48px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10px;font-weight:700}.mobile-nav button .ti{font-size:22px}.mobile-nav button[aria-pressed=true]{color:#b53561}.footer{margin-top:30px;flex-direction:column;align-items:flex-start;gap:7px}.toast{bottom:calc(75px + env(safe-area-inset-bottom))}.study-panel{padding:18px}.study-word{font-size:68px;margin:18px 0 8px}.study-answer{margin-bottom:12px}.study-progress{margin-top:12px}dialog#writing-modal{width:100%;max-width:none;height:100%;max-height:none;margin:0;border:0;border-radius:0;padding-bottom:env(safe-area-inset-bottom)}.modal-heading{padding:13px 16px}.modal-heading h2{font-size:18px}.modal-body{grid-template-columns:1fr;padding:12px 16px;gap:9px}.write-info{display:grid;grid-template-columns:auto 1fr;gap:1px 12px;align-items:center}.write-word{grid-row:span 2;font-size:34px}.write-py,.write-vi{font-size:13px}.write-sample,.write-note{display:none}.draw-column{gap:8px}.writer-frame{width:min(100%,min(320px,38dvh))}.mode-tabs .btn{font-size:11px}.draw-actions .btn{font-size:11px}.draw-bar .btn{padding:7px}}
@media(max-width:340px){.card-actions .btn{font-size:11px;padding:7px 5px}.stat-label{font-size:9px}.intro-mark{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{body{background:white;color:#111;font:11px/1.4 Arial,sans-serif}.topbar,main,.footer,dialog,.toast,.mobile-nav{display:none!important}.print-only{display:block!important}.print-header{display:flex;justify-content:space-between;border-bottom:2px solid #eea5bb;padding-bottom:8px;margin-bottom:12px}.print-header strong{font-size:17px}.print-header small{font-size:10px}.print-title{font-weight:800;font-size:13px;margin:12px 0 7px;color:#9f325c}.print-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px 9px}.print-item{break-inside:avoid;border:1px solid #ddd;border-radius:7px;padding:8px}.print-item-line{display:flex;justify-content:space-between}.print-hanzi{font-size:21px}.print-py{font-size:11px}.print-vi,.print-example{font-size:10px}.writing-grid{display:flex;gap:4px;margin-top:7px}.writing-grid .square{flex:1;aspect-ratio:1;border:1px solid #bbb;position:relative}.writing-grid .square:after{content:"";position:absolute;left:0;right:0;top:50%;border-top:1px dashed #ddd}.writing-grid .square:before{content:"";position:absolute;top:0;bottom:0;left:50%;border-left:1px dashed #ddd}.print-section{break-inside:auto}.print-intro{font-size:10px}}