.sfn-app{--navy:#17324f;--pink:#ef3c78;--cream:#fff7e7;--lilac:#f6efff;--line:#d7e0ea;--text:#2d4059;max-width:1180px;margin:24px auto;font-family:Arial,"Noto Sans SC",sans-serif;color:var(--text);line-height:1.5}.sfn-app *{box-sizing:border-box}.sfn-hero{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:34px;border-radius:24px;background:linear-gradient(135deg,#fff7e7,#f7f0ff 55%,#eafbf7);border:1px solid #f4d59f}.sfn-kicker{display:block;color:var(--pink);font-size:12px;font-weight:800;letter-spacing:1.5px}.sfn-hero h2{margin:8px 0 0;color:var(--navy);font-size:clamp(28px,4vw,46px);line-height:1.1}.sfn-hero p{margin:8px 0 0}.sfn-hero-zh{color:var(--pink);font-size:22px;font-weight:700}.sfn-count{width:128px;height:128px;flex:0 0 128px;border-radius:50%;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 10px 35px rgba(23,50,79,.12);color:var(--navy)}.sfn-count strong{font-size:42px;line-height:1}.sfn-count span{font-weight:700}
.sfn-tabs{display:flex;gap:10px;margin:22px 0}.sfn-tabs button,.sfn-toolbar button,.sfn-primary,.sfn-sound-hint{appearance:none;border:0;border-radius:12px;padding:12px 18px;font-weight:800;cursor:pointer}.sfn-tabs button{background:#eef3f8;color:var(--navy)}.sfn-tabs button.is-active{background:var(--navy);color:#fff}.sfn-panel{display:none}.sfn-panel.is-active{display:block}.sfn-toolbar{display:grid;grid-template-columns:1fr 1fr auto;gap:14px;align-items:end;padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff}.sfn-toolbar label,.sfn-game-intro label{display:flex;flex-direction:column;gap:6px;font-weight:800;color:var(--navy)}.sfn-toolbar select,.sfn-toolbar input,.sfn-game-intro select{width:100%;min-height:46px;border:1px solid #bdcadd;border-radius:10px;padding:9px 12px;background:#fff;color:var(--text);font-size:15px}.sfn-toolbar-actions{display:flex;gap:8px}.sfn-toolbar button{background:var(--lilac);color:var(--navy)}.sfn-tip{margin:16px 2px 8px;color:#5c6b80}.sfn-fact-note{margin:0 0 18px;padding:12px 14px;border-left:5px solid var(--pink);border-radius:10px;background:#fff7fb;color:#41546b;font-size:14px;line-height:1.65}
.sfn-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;align-items:stretch}.sfn-card{position:relative;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 6px 18px rgba(23,50,79,.07);transition:.18s}.sfn-card:nth-child(3n+1){background:#fffaf0;border-color:#f1d39d}.sfn-card:nth-child(3n+2){background:#f0fcf8;border-color:#a9e6d6}.sfn-card:nth-child(3n){background:#faf7ff;border-color:#d8c8f5}.sfn-card:hover{transform:translateY(-3px);box-shadow:0 11px 25px rgba(23,50,79,.13)}.sfn-card-number{position:absolute;z-index:2;top:10px;left:10px;background:var(--navy);color:#fff;border-radius:999px;padding:4px 9px;font-weight:800;font-size:12px}.sfn-image-wrap{height:220px;background:#fff;display:flex;align-items:center;justify-content:center}.sfn-card-image{height:100%;width:100%;object-fit:contain;background:#fff}.sfn-image-fallback{height:100%;width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;font-size:52px;color:var(--navy)}.sfn-image-fallback[hidden]{display:none}.sfn-image-fallback span{font-size:15px;font-weight:800}.sfn-card-body{padding:16px 18px 20px}.sfn-title-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.sfn-card h3{margin:0;color:var(--navy);font-size:21px}.sfn-card small{display:block;color:#5d6d82;font-size:11px;font-weight:900;letter-spacing:.7px}.sfn-pronunciation{display:flex;align-items:center;gap:8px;margin:12px 0 18px;padding:10px;border-radius:10px;background:#fff1bf;color:#714e00}.sfn-pronunciation small{color:#8a5a00}.sfn-pronunciation strong{font-size:16px}.sfn-language{padding-bottom:14px;border-bottom:1px solid var(--line)}.sfn-pinyin{margin:2px 0 12px;color:#53667f;font-style:italic}.sfn-hanzi{margin:2px 0 13px;color:var(--navy);font-size:20px;font-weight:700}.sfn-about{padding-top:13px}.sfn-about>p{margin:3px 0 12px;font-size:17px;line-height:1.55}.sfn-description-zh{color:#244b69}.sfn-use{margin:14px 0;padding:12px;border:1px solid #c8e4db;border-left:5px solid #168b72;border-radius:11px;background:#f1fbf7}.sfn-use p{margin:3px 0 11px;font-size:15px;line-height:1.55}.sfn-use p:last-child{margin-bottom:0}.sfn-use-zh{color:#244b69}.sfn-play{flex:0 0 45px;width:45px;height:45px;border:0;border-radius:50%;background:linear-gradient(135deg,#ef3c78,#7c4ad9);color:#fff;font-size:18px;cursor:pointer;box-shadow:0 5px 14px rgba(122,73,204,.3)}.sfn-explanation{border:0;background:transparent;color:#087f7a;font-weight:800;padding:4px 0;cursor:pointer;text-align:left}.sfn-play.is-playing,.sfn-explanation.is-playing{animation:sfnPulse 1s infinite}.sfn-empty{text-align:center;padding:30px}
.sfn-game-intro,.sfn-result{padding:28px;border-radius:20px;background:var(--cream);border:1px solid #f1d39d;text-align:center}.sfn-game-intro h3{font-size:30px;color:var(--navy);margin:5px 0}.sfn-game-intro label{max-width:420px;margin:20px auto;text-align:left}.sfn-primary{background:var(--pink);color:#fff;font-size:16px}.sfn-game{max-width:720px;margin:auto;padding:24px;border:1px solid var(--line);border-radius:22px;background:#fff;text-align:center}.sfn-game-top{display:flex;justify-content:space-between;color:var(--navy);margin-bottom:14px}.sfn-game img{display:block;width:min(100%,430px);height:330px;object-fit:contain;margin:auto;border-radius:18px;background:#fff;border:1px solid #edf1f5}.sfn-sound-hint{margin:14px 0;background:var(--lilac);color:var(--navy)}.sfn-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.sfn-option{border:2px solid #d3deea;border-radius:12px;background:#fff;padding:13px;color:var(--navy);font-weight:800;cursor:pointer}.sfn-option:hover{border-color:#9f74d9;background:#faf7ff}.sfn-option.correct{background:#e5f8ef;border-color:#26a875;color:#146344}.sfn-option.wrong{background:#fff0f3;border-color:#ee5c82;color:#9d2848}.sfn-feedback{min-height:34px;margin:14px 0;font-size:17px;font-weight:800}.sfn-result h3{font-size:32px;color:var(--navy);margin:0 0 8px}@keyframes sfnPulse{50%{transform:scale(1.08)}}
.sfn-youdao{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.sfn-youdao-button{display:inline-flex;align-items:center;gap:7px;min-height:39px;padding:7px 11px;border:1px solid #e5e7eb;border-radius:999px;background:#f6f7f9;color:#364152;font:inherit;font-size:14px;font-weight:650;cursor:pointer}.sfn-youdao-button:hover,.sfn-youdao-button:focus-visible{border-color:#ef8bad;background:#fff4f7}.sfn-youdao-button .sfn-dialect{color:#4b5563;font-size:16px;font-weight:900}.sfn-youdao-button.is-playing{border-color:#ef3c78;background:#fff0f5;animation:sfnPulse 1s infinite}
.sfn-youdao-button.is-error{border-color:#c7364f;background:#fff0f2;color:#8e2035}.sfn-youdao-button.is-error span:nth-child(2){display:none}.sfn-youdao-button.is-error::after{content:'有道暂无发音';font-size:12px;font-weight:800}
@media(max-width:900px){.sfn-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.sfn-toolbar{grid-template-columns:1fr 1fr}.sfn-toolbar-actions{grid-column:1/-1}.sfn-hero{align-items:flex-start}.sfn-count{width:96px;height:96px;flex-basis:96px}.sfn-count strong{font-size:32px}}@media(max-width:560px){.sfn-app{margin:12px auto}.sfn-hero{padding:22px;display:block}.sfn-count{margin:18px auto 0}.sfn-tabs{display:grid}.sfn-toolbar{grid-template-columns:1fr}.sfn-toolbar-actions{grid-column:auto;display:grid}.sfn-grid{grid-template-columns:1fr}.sfn-image-wrap{height:240px}.sfn-options{grid-template-columns:1fr}.sfn-game img{height:260px}}