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.lesson-item-tooltip{width:calc(100vw - 24px);max-width:220px}}@media(max-width:900px)and (orientation:portrait){body{font-size:16px;line-height:1.6}.header{padding:12px 16px;flex-direction:column;gap:16px}.logo-area{display:flex;align-items:center;gap:12px;justify-content:center}.logo-area h1{font-size:18px;line-height:1.4}.logo-area h1 span{font-size:13px}.avatar{width:50px!important;height:50px!important}.search-box{width:calc(100% - 20px);max-width:300px}.search-box input{width:100%;font-size:14px;padding:10px 12px}.search-box button{padding:10px 14px;font-size:16px}.hero-section{padding:16px 12px}.hero-section .container{gap:16px;flex-direction:column;align-items:center}.hero-avatar{width:100px;height:100px}.hero-avatar img{width:100%;height:100%}.hero-info{text-align:center;width:100%}.hero-info h2{font-size:22px;margin-bottom:12px}.hero-info .desc{font-size:14px;line-height:1.5;margin-bottom:16px}.achievements{gap:8px}.achievement-item{font-size:13px;line-height:1.4}.features-section{padding:16px 12px}.section-title{font-size:22px;margin-bottom:16px}.section-title small{font-size:14px}.features-grid{grid-template-columns:1fr;gap:12px}.feature-card{padding:16px;font-size:15px}.feature-icon{font-size:32px;margin-bottom:8px}.hsk-nav-wrapper{max-width:100%;padding:0 12px 8px;width:100%}.hsk-nav{padding:10px 12px;gap:8px;overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:12px}.hsk-item{padding:6px 12px;font-size:12px;min-height:40px;display:flex;align-items:center;border-radius:20px;white-space:nowrap;flex-shrink:0}.content-area{max-width:100%;padding:12px 12px 24px;width:100%}.back-home{padding:10px 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0;white-space:nowrap;flex-shrink:0}.tab-content{padding:14px;font-size:14px}.cn{font-size:22px;line-height:1.5}.vi{font-size:14px;line-height:1.5}.pinyin{font-size:12px}.example-with-audio{flex-direction:column;align-items:flex-start;gap:8px;padding:12px}.example-with-audio .text-group .cn{font-size:18px;line-height:1.4}.example-with-audio .text-group .vi{font-size:13px}button,input[type=button],input[type=submit]{min-height:44px;font-size:14px;padding:10px 16px!important}.btn-audio{min-width:44px;min-height:44px;padding:8px!important;border-radius:8px;font-size:16px}#toggleToolbarBtn{bottom:16px;right:16px;width:56px;height:56px;font-size:24px}.highlight-toolbar{padding:12px!important;border-radius:14px}.toolbar-row button{padding:8px 12px!important;font-size:12px;min-height:36px}.login-box{padding:32px 20px;max-width:90%;border-radius:16px}.login-box h2{font-size:20px;margin-bottom:12px}.login-box p{font-size:14px;margin-bottom:16px}.google-btn{padding:14px 16px!important;font-size:14px}.user-info,.logout-btn{font-size:12px;padding:8px 12px!important;min-height:auto}}@media(max-width:480px)and (orientation:portrait){body{font-size:15px}.header{padding:10px 12px;gap:12px}.logo-area h1{font-size:16px}.logo-area h1 span{font-size:11px}.hero-section{padding:12px 10px}.hero-info h2{font-size:18px}.hero-info .desc{font-size:13px}.achievement-item{font-size:12px}.section-title{font-size:18px}.feature-card{padding:14px;font-size:14px}.hsk-item{padding:6px 10px;font-size:11px}.lesson-item{padding:10px 12px;font-size:13px}.card{padding:14px}.card h3{font-size:15px}.cn{font-size:18px}.vi{font-size:12px}}@media(orientation:landscape){.header{padding:8px 20px}.hero-section,.features-section{padding:12px 20px}.content-area{padding:8px 20px 16px}}.tian-zi-ge{position:relative;display:inline-flex;align-items:center;justify-content:center;background-color:#fffdfa;border:2px solid #e11d48;border-radius:12px;box-shadow:inset 0 0 0 1px #fecdd3,0 2px 6px #e11d4814;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100%25' height='100%25'%3E%3Cline x1='0' y1='50%25' x2='100%25' y2='50%25' stroke='%23fca5a5' stroke-width='1.5' stroke-dasharray='4,3'/%3E%3Cline x1='50%25' y1='0' x2='50%25' y2='100%25' stroke='%23fca5a5' stroke-width='1.5' stroke-dasharray='4,3'/%3E%3Cline x1='0' y1='0' x2='100%25' y2='100%25' stroke='%23fca5a5' stroke-width='1.5' stroke-dasharray='4,3'/%3E%3Cline x1='100%25' y1='0' x2='0' y2='100%25' stroke='%23fca5a5' stroke-width='1.5' stroke-dasharray='4,3'/%3E%3C/svg%3E");background-size:100% 100%;font-family:Kaiti,STKaiti,KaiTi_GB2312,"Noto Serif SC",serif,cursive;color:#1e293b;user-select:none;flex-shrink:0}#hanziWriterTarget svg,#hanziWriterTarget canvas{background:transparent!important}@keyframes slideUpInline{0%{transform:translate(-50%,20px);opacity:0}to{transform:translate(-50%);opacity:1}}.hanzi-module-wrapper{width:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:column;gap:20px}.hanzi-banner{background:linear-gradient(135deg,#f3e8ff,#fce7f3,#e0e7ff);padding:24px 30px;border-radius:20px;border:1px solid #e9d5ff;box-shadow:0 4px 15px #a855f714;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px}.hanzi-banner-title{font-family:Lexend,sans-serif;font-size:26px;font-weight:800;color:#6b21a8;margin-bottom:6px}.hanzi-banner-stats{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}.hanzi-stat-badge{background:#ffffffd9;border:1px solid #d8b4fe;color:#7e22ce;font-size:13px;font-weight:600;padding:4px 12px;border-radius:20px;display:inline-flex;align-items:center;gap:6px}.hanzi-banner-actions{display:flex;gap:10px;flex-wrap:wrap}.hanzi-btn-action{background:linear-gradient(135deg,#9333ea,#7e22ce);color:#fff;border:none;padding:10px 18px;border-radius:12px;font-weight:700;font-size:14px;cursor:pointer;box-shadow:0 4px 12px #9333ea40;transition:all .2s ease;display:inline-flex;align-items:center;gap:6px}.hanzi-btn-action:hover{transform:translateY(-2px);box-shadow:0 6px 16px #9333ea59}.hanzi-btn-secondary{background:#fff;color:#7e22ce;border:1.5px solid #c084fc;padding:9px 16px;border-radius:12px;font-weight:700;font-size:14px;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;gap:6px}.hanzi-btn-secondary:hover{background:#f3e8ff;transform:translateY(-2px)}.hanzi-filter-bar{background:#fff;padding:16px 20px;border-radius:16px;border:1px solid #f3e8ff;box-shadow:0 2px 8px #0000000a;display:flex;flex-wrap:wrap;gap:12px;align-items:center}.hanzi-search-input{flex:1;min-width:200px;padding:10px 16px;border:1.5px solid #e9d5ff;border-radius:12px;font-size:14px;outline:none;transition:border-color .2s ease}.hanzi-search-input:focus{border-color:#a855f7;box-shadow:0 0 0 3px #a855f726}.hanzi-select-filter{padding:10px 14px;border:1.5px solid #e9d5ff;border-radius:12px;font-size:13px;font-weight:600;color:#4a5568;background:#fff;outline:none;cursor:pointer}.hanzi-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.hanzi-card{background:#fff;border-radius:16px;border:1px solid #f3e8ff;padding:16px;box-shadow:0 2px 8px #0000000a;transition:all .25s ease;display:flex;flex-direction:column;justify-content:space-between;gap:12px;cursor:pointer;position:relative}.hanzi-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #9333ea1f;border-color:#d8b4fe}.hanzi-card-header{display:flex;gap:14px;align-items:center}.hanzi-main-meta{flex:1;min-width:0}.hanzi-pinyin-row{display:flex;align-items:center;gap:8px}.hanzi-pinyin-text{font-size:18px;font-weight:700;color:#7e22ce}.hanzi-strokes-tag{font-size:11px;font-weight:700;background:#f3e8ff;color:#9333ea;padding:2px 8px;border-radius:10px}.hanzi-meaning-text{font-size:15px;font-weight:600;color:#1e293b;margin:4px 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.2s}.btn-hanzi-fc:hover{background:#fde68a}.hanzi-pagination-bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding:12px 0}.hanzi-page-btn{background:#fff;border:1px solid #cbd5e1;padding:6px 14px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;color:#334155;transition:all .2s ease}.hanzi-page-btn:disabled{opacity:.5;cursor:not-allowed}.hanzi-page-btn.active{background:#9333ea;color:#fff;border-color:#9333ea}.hsk1 .hanzi-banner{background:linear-gradient(135deg,#e8f5e9,#f0fdf4,#dcfce7);border-color:#a7f3d0;box-shadow:0 4px 15px #10b98114}.hsk1 .hanzi-banner-title{color:#047857}.hsk1 .hanzi-stat-badge{background:#ffffffe6;border-color:#a7f3d0;color:#047857}.hsk1 .hanzi-btn-action{background:linear-gradient(135deg,#10b981,#059669);color:#fff;box-shadow:0 4px 12px #10b98140}.hsk1 .hanzi-btn-action:hover{box-shadow:0 6px 16px #10b98159}.hsk1 .hanzi-btn-secondary{color:#047857;border-color:#6ee7b7;background:#fff}.hsk1 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