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auto;min-width:0;border:0;outline:0;background:transparent;color:var(--muted);font-size:.8rem;font-weight:700;line-height:1}.mall-search-box input::placeholder{color:#aeb8c0}.mall-search-action{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;height:34px;border:0;padding:0 13px;border-radius:999px;background:linear-gradient(135deg,var(--mall-primary),var(--mall-primary-dark));color:#fff;font-size:.78rem;font-weight:850;box-shadow:0 5px 12px #f46f4c2e}.mall-goods-search-page .mall-search{top:46px}.mall-banner{height:172px;overflow:hidden;border-radius:var(--radius);border:1px solid rgba(255,207,181,.68);background:var(--mall-cream);box-shadow:var(--mall-shadow)}.mall-banner-slide{position:relative;height:100%;overflow:hidden}.mall-banner-slide img{width:100%;height:100%;object-fit:cover}.mall-category-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;padding:12px 8px;border:1px solid var(--mall-line);border-radius:var(--radius);background:linear-gradient(180deg,#fff,#fff8f2);box-shadow:var(--mall-shadow)}.mall-category-item{display:grid;justify-items:center;gap:6px;min-width:0;border:0;padding:0;background:transparent;color:var(--ink)}.mall-category-item img{display:block;width:52px;height:52px;border-radius:16px;object-fit:cover;box-shadow:0 5px 12px #705b491f}.mall-category-item strong{max-width:100%;color:#526575;font-size:.72rem;font-weight:800;line-height:1.2;text-align:center}.mall-product-section{display:grid;gap:10px}.mall-section-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px}.mall-section-head h2{margin:0;color:#3c4650;font-size:1.08rem;font-weight:900}.mall-section-more{display:inline-flex;align-items:center;gap:2px;border:0;padding:0;background:transparent;color:var(--mall-primary-dark);font-size:.78rem;font-weight:750}.mall-section-more .van-icon{font-size:.82rem}.mall-product-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mall-product-card{overflow:hidden;border:1px solid rgba(255,216,190,.72);border-radius:var(--radius);background:#fffffffa;box-shadow:var(--mall-shadow)}.mall-product-card img{width:100%;aspect-ratio:1 / 1;object-fit:cover;background:linear-gradient(180deg,var(--mall-rose-soft),var(--mall-cream))}.mall-product-copy{display:grid;gap:5px;padding:9px 10px 11px}.mall-product-copy h3{display:-webkit-box;min-height:2.7em;margin:0;overflow:hidden;color:var(--ink);font-size:.86rem;font-weight:850;line-height:1.35;-webkit-box-orient:vertical;-webkit-line-clamp:2}.mall-product-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0}.mall-product-meta span{color:var(--mall-primary-dark);font-size:.9rem;font-weight:900}.mall-product-meta small{color:var(--muted);font-size:.74rem;font-weight:700;white-space:nowrap}.mall-product-skeleton-card{pointer-events:none}.mall-product-skeleton-image{width:100%;aspect-ratio:1 / 1}.mall-product-skeleton-title{width:92%;height:13px;border-radius:5px}.mall-product-skeleton-title.is-short{width:66%;margin-top:7px}.mall-product-skeleton-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}.mall-product-skeleton-meta span,.mall-product-skeleton-meta small{display:block;height:12px;border-radius:5px}.mall-product-skeleton-meta span{width:54px}.mall-product-skeleton-meta small{width:42px}.mall-section-title-skeleton{width:92px;height:18px;border-radius:6px}.mall-skeleton-shimmer{position:relative;overflow:hidden;background:#f1f3f5}.mall-skeleton-shimmer:after{position:absolute;top:0;right:0;bottom:0;left:0;transform:translate(-100%);background:linear-gradient(90deg,transparent,rgba(255,255,255,.78),transparent);animation:mall-skeleton-shimmer 1.35s ease-in-out infinite;content:""}@keyframes mall-skeleton-shimmer{to{transform:translate(100%)}}@media (prefers-reduced-motion: reduce){.mall-skeleton-shimmer:after{animation:none}}.mall-category-page{--mall-primary: #ff8f6b;--mall-primary-dark: #f46f4c;--mall-cream: #fff7ec;--mall-line: rgba(255, 187, 148, .34);--mall-shadow: 0 10px 24px rgba(255, 143, 107, .12);gap:12px}.mall-category-page .mall-second-tabs{border-bottom-color:var(--mall-line);background:linear-gradient(180deg,#fff,#fff8f2);box-shadow:var(--mall-shadow)}.mall-category-page .mall-second-tabs .van-tabs__wrap,.mall-category-page .mall-second-tabs .van-tabs__content{background:transparent}.mall-category-page .mall-second-tabs .van-tabs__nav{gap:2px;background:transparent}.mall-category-page .mall-second-tabs .van-tab{color:#8a7170;font-weight:800}.mall-category-page .mall-second-tabs .van-tab--active{color:var(--mall-primary-dark);font-weight:900}.mall-category-page .mall-second-tabs 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#212a3229;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.mall-goods-gallery{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;overflow:hidden;border:0;border-radius:0;background:var(--mall-cream);box-shadow:none}.mall-goods-gallery .van-swipe__track,.mall-goods-gallery .van-swipe-item{height:100%!important}.mall-goods-gallery img{display:block;width:100%;height:100%;object-fit:cover;background:var(--mall-cream)}.mall-goods-summary{display:grid;gap:8px;padding:14px;border:0;border-bottom:1px solid rgba(255,216,190,.72);border-radius:0;background:linear-gradient(180deg,#fff,#fff8f2);box-shadow:none}.mall-goods-price-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.mall-goods-price-row strong{color:var(--mall-primary-dark);font-size:1.4rem;font-weight:950}.mall-goods-price-row span{color:var(--muted);font-size:.78rem;font-weight:760;line-height:1}.mall-goods-summary h1{margin:0;color:var(--ink);font-size:1rem;font-weight:900;line-height:1.42}.mall-goods-service{display:flex;gap:8px;padding:0 12px;min-height:36px;align-items:center;border:0;border-bottom:1px solid var(--mall-line);border-radius:0;background:linear-gradient(180deg,#fff,#fff8f2)}.mall-goods-service span{flex:1 1 0;color:var(--mall-primary-dark);font-size:.76rem;font-weight:850;text-align:center}.mall-goods-detail-images{overflow:hidden;border-radius:0;background:#fff}.mall-goods-detail-images img{display:block;width:100%;margin:0}.mall-goods-action-bar{width:min(100%,var(--mobile-width));left:50%;transform:translate(-50%);border-top:1px solid rgba(255,216,190,.88);background:#fffffffa}.mall-goods-action-bar .van-action-bar-icon{color:#8a7170;font-weight:780}.mall-goods-action-bar .van-action-bar-icon.is-favorite,.mall-goods-action-bar .van-action-bar-icon.is-favorite .van-icon{color:var(--mall-primary-dark)}.mall-goods-action-bar .van-action-bar-button,.mall-goods-action-bar 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p{margin:0;color:#4a555e;font-size:.96rem;font-weight:750;line-height:1.6;text-align:center}:root{color-scheme:light;--bg: #f5f8fb;--surface: #ffffff;--surface-soft: #f3f7fa;--ink: #172833;--muted: #697985;--line: #e2eaf0;--blue: #1778bd;--blue-dark: #0d5d94;--green: #3dae66;--mint: #e1f6ea;--yellow: #ffd166;--orange: #ef8742;--rose: #ed6b82;--card-border: rgba(218, 229, 236, .92);--shadow: 0 18px 40px rgba(24, 75, 110, .1);--shadow-soft: 0 8px 22px rgba(24, 75, 110, .055);--shadow-press: 0 4px 12px rgba(24, 75, 110, .08);--radius: 8px;--mobile-width: 430px;--safe-bottom: env(safe-area-inset-bottom, 0px);--van-primary-color: var(--blue);--van-success-color: var(--green);--van-danger-color: var(--rose);--van-text-color: var(--ink);--van-text-color-2: var(--muted);--van-border-color: var(--line);--van-radius-md: var(--radius);--van-font-bold: 750;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft 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span{font-size:clamp(2.1rem,11vw,4rem);font-weight:950;line-height:1}.math-expression span{color:#655bc8}.math-answer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.math-answer-button{height:52px;border-color:#7b72d933;background:#fff;color:var(--ink);font-size:1.12rem;font-weight:900}.math-answer-button.is-right{border-color:#2bac6acc;background:#2bac6a24;color:#15905a}.math-answer-button.is-wrong{border-color:#ef4444c2;background:#ef44441f;color:#dc2626}.math-feedback{margin:-2px 0 0;text-align:center;font-size:1rem;font-weight:900}.math-feedback.is-right{color:#15905a}.math-feedback.is-wrong{color:#dc2626}.math-question-actions{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.math-question-actions span{color:var(--muted);font-size:.84rem;font-weight:850;white-space:nowrap}.math-placeholder-panel{display:grid;gap:12px;min-height:360px;padding:16px;border:1px solid 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.math-currency-image{max-width:160px;max-height:160px}.math-currency-face-badge{position:absolute;right:12px;bottom:10px;display:inline-flex;align-items:center;justify-content:center;min-height:24px;padding:3px 9px;border:1px solid rgba(123,114,217,.18);border-radius:999px;background:#ffffffeb;color:#6b63c7;font-size:.72rem;font-weight:850;line-height:1;box-shadow:0 8px 18px #4d58781f}.math-currency-title{display:inline-flex;align-items:baseline;justify-content:center;gap:12px;min-width:0}.math-shape-figure{position:relative;width:128px;height:128px;background:linear-gradient(135deg,#8eddf7,#4f91f7 54%,#2563d9);box-shadow:0 16px 32px #2563d92e}.math-shape-spell{color:#6b7280;font-size:1.05rem;font-weight:650}.math-shape-meaning{color:#1f2937;font-size:1.25rem;font-weight:900}.math-shape-figure.is-triangle{width:150px;height:132px;clip-path:polygon(50% 0,100% 100%,0 100%);filter:drop-shadow(0 14px 24px rgba(37,99,217,.16))}.math-shape-figure.is-square{border-radius:0}.math-shape-figure.is-rectangle{width:168px;height:104px;border-radius:0}.math-shape-figure.is-circle,.math-shape-figure.is-sphere{border-radius:50%}.math-shape-figure.is-sphere{background:radial-gradient(circle at 32% 28%,#fff 0,#fff 8%,#9fd6ff 18%,#7b72d9 72%)}.math-shape-figure.is-semicircle{height:70px;border-radius:128px 128px 0 0}.math-shape-figure.is-sector{border-radius:100% 0 0;transform:rotate(45deg)}.math-shape-figure.is-oval{width:168px;height:104px;border-radius:50%}.math-shape-figure.is-trapezoid{width:150px;height:110px;clip-path:polygon(22% 0,78% 0,100% 100%,0 100%)}.math-shape-figure.is-parallelogram{width:160px;height:104px;border-radius:0;transform:skew(-18deg)}.math-shape-figure.is-pentagon{clip-path:polygon(50% 0%,100% 38%,82% 100%,18% 100%,0% 38%)}.math-shape-figure.is-hexagon{clip-path:polygon(25% 4%,75% 4%,100% 50%,75% 96%,25% 96%,0% 50%)}.math-shape-figure.is-star{clip-path:polygon(50% 0%,61% 35%,98% 35%,68% 56%,79% 91%,50% 70%,21% 91%,32% 56%,2% 35%,39% 35%)}.math-solid-svg{display:block;width:178px;height:160px;overflow:visible;filter:drop-shadow(0 16px 24px rgba(37,99,217,.16))}.math-solid-svg.is-cuboid{width:214px;height:146px}.math-solid-svg.is-pyramid{filter:drop-shadow(0 16px 24px rgba(180,83,9,.18))}.math-solid-svg polyline,.math-solid-svg line{fill:none;stroke:#ffffffd1;stroke-linecap:round;stroke-linejoin:round;stroke-width:3.5}.math-solid-svg.is-cube polyline,.math-solid-svg.is-cube line,.math-solid-svg.is-cuboid polyline,.math-solid-svg.is-cuboid line{stroke:#ffffffa3;stroke-width:2.2}.math-solid-svg.is-pyramid .is-light-line{stroke:#ffffffdb;stroke-width:3}.math-solid-svg.is-pyramid .is-dark-line{stroke:#ffffffa8;stroke-width:3.2}.math-solid-svg.is-pyramid .is-base-line{stroke:#2563eb9e;stroke-width:3}.math-solid-svg.is-pyramid .is-hidden-edge{stroke-dasharray:6 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420px){.math-mode-switch{justify-content:flex-end}.math-answer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.math-counting-panel{display:grid;gap:14px}.math-counting-card{display:grid;gap:16px;padding:18px 24px;border:1px solid rgba(123,114,217,.18);border-radius:var(--radius);background:linear-gradient(180deg,#f8f7fffa,#fffffff5);box-shadow:var(--shadow-soft)}.math-counting-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.math-counting-head span{color:var(--muted);font-size:.88rem;font-weight:600}.math-counting-head .van-button{border-color:#7b72d952!important;background:#fff!important}.math-counting-head .van-button .van-button__text,.math-counting-head .van-button .van-icon{color:#655bc8!important}.math-counting-head .van-button.is-reading{background:#ff4d4f!important;border-color:#ff4d4f!important}.math-counting-head .van-button.is-reading .van-button__text,.math-counting-head .van-button.is-reading 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.van-button.is-reading{background:#ff4d4f!important;border-color:#ff4d4f!important}.math-multiplication-head .van-button.is-reading .van-button__text,.math-multiplication-head .van-button.is-reading .van-icon{color:#fff!important}.math-multiplication-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;min-width:0}.math-multiplication-item{display:flex;align-items:center;justify-content:center;min-height:45px;padding:8px;background:#fff;border:2px solid rgba(123,114,217,.15);border-radius:8px;font-size:clamp(.8rem,2.5vw,1rem);font-weight:700;color:#7b72d9;cursor:pointer;transition:all .2s ease;-webkit-user-select:none;user-select:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.math-multiplication-item:hover{border-color:#7b72d94d;transform:translateY(-2px);box-shadow:0 4px 8px #7b72d926}.math-multiplication-item.is-active{background:linear-gradient(135deg,#7b72d9,#9b8ff0);border-color:#7b72d9;color:#fff;transform:scale(1.05);box-shadow:0 6px 12px 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2px;font-size:.98rem;font-weight:850;line-height:1.35}.daily-card-pinyin{display:block;margin-bottom:6px;color:#604a369e;font-size:.76rem;font-weight:700;line-height:1.25}.vip-content-tag{display:inline-flex;align-items:center;justify-content:center;min-height:18px;margin-top:5px;padding:2px 7px;border:1px solid rgba(239,135,66,.26);border-radius:999px;background:#fff3e0eb;color:#b65d21;font-size:.68rem;font-weight:900;line-height:1;vertical-align:middle}.daily-card-inner p{margin:0;color:var(--muted);font-size:.84rem;line-height:1.55;display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2}.video-card{overflow:hidden;padding:0;border:1px solid var(--card-border);border-radius:var(--radius);background:#fffffff5;box-shadow:var(--shadow-soft);color:inherit;text-align:left}.video-card-inner{display:grid;min-width:0}.video-thumb{position:relative;overflow:hidden;background:#e4edf2}.video-thumb img{width:100%;aspect-ratio:16 / 9;object-fit:cover}.play-badge{position:absolute;right:8px;bottom:8px;display:grid;place-items:center;width:28px;height:28px;border-radius:999px;background:#172833c2;color:#fff;font-size:.78rem;line-height:1;box-shadow:0 6px 16px #1728332e}.vip-corner-badge{position:absolute;top:8px;right:8px;z-index:1;display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:20px;padding:0 7px;border-radius:999px;background:linear-gradient(135deg,#ffd166,#ef8742);color:#fff;font-size:.68rem;font-weight:900;line-height:1;box-shadow:0 8px 18px #bc5f2438}.daily-thumb .vip-corner-badge{top:6px;right:6px;min-width:30px;height:18px;padding:0 6px;font-size:.62rem}.play-badge.is-large{right:50%;bottom:50%;width:48px;height:48px;font-size:1.1rem;transform:translate(50%,50%)}.video-card h3{min-height:36px;margin:0;padding:10px 11px 2px;font-size:.92rem;font-weight:800;line-height:1.35}.video-card-pinyin{display:block;min-height:22px;padding:0 11px 10px;color:#604a369e;font-size:.75rem;font-weight:700;line-height:1.3}.lesson-layout{display:grid;gap:14px}.detail-view{gap:16px}.detail-hero,.detail-panel,.image-detail-card,.video-player-card{border:1px solid var(--card-border);border-radius:var(--radius);background:#fffffff5;box-shadow:var(--shadow-soft)}.detail-hero{position:relative;display:grid;gap:10px;overflow:hidden;padding:18px 16px;background:radial-gradient(circle at 100% 0%,var(--accent-soft),transparent 9rem),linear-gradient(135deg,#fffffff5,#fff)}.detail-hero:after{content:"";position:absolute;right:18px;top:18px;width:10px;height:10px;border-radius:999px;background:var(--accent)}.detail-kicker{color:var(--blue-dark);font-size:.78rem;font-weight:850}.detail-hero h2,.image-detail-copy h2,.detail-panel-head h2{margin:0;letter-spacing:0}.detail-hero h2{max-width:12em;font-size:1.55rem;font-weight:900}.detail-hero p,.image-detail-copy p{margin:0;color:var(--muted);line-height:1.62}.detail-stats,.detail-rich-list{display:grid;gap:10px}.detail-stats{grid-template-columns:repeat(3,minmax(0,1fr))}.rich-item{display:grid;gap:5px;min-width:0;padding:11px;border:1px solid rgba(226,234,240,.82);border-radius:var(--radius);background:#fff}.rich-item span{color:var(--muted);font-size:.76rem;font-weight:750}.rich-item strong{color:var(--ink);font-size:.92rem;line-height:1.45}.image-fact-item{display:grid;gap:5px;min-width:0;padding:12px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.image-fact-item span{color:#604a36a8;font-size:.86rem;font-weight:750;line-height:1.35}.image-fact-item strong{color:var(--ink);font-size:.92rem;font-weight:500;line-height:1.55}.lesson-list{display:grid;gap:10px}.lesson-row{display:block;width:100%;height:auto;min-height:72px;border:1px solid var(--card-border);border-radius:var(--radius);background:#fffffff5;padding:11px 12px;color:inherit;line-height:normal;text-align:left;box-shadow:0 6px 16px #144a6c09}.lesson-row:after{display:none}.lesson-row .van-cell__title{min-width:0}.lesson-row-inner{display:grid;grid-template-columns:max-content minmax(0,1fr);gap:8px 12px;align-items:center;width:100%;min-width:0}.learn-lesson-list .lesson-row{flex:0 0 max-content;width:max-content;min-width:max-content;max-width:max-content;height:112px;min-height:0;padding:10px 14px}.learn-lesson-list .lesson-row .van-cell__title{flex:0 0 auto;width:max-content;min-width:max-content}.learn-lesson-list .lesson-row-inner{display:flex;flex-direction:column;align-items:flex-start;gap:6px;width:max-content;min-width:max-content}.learn-lesson-list .lesson-row-inner span{grid-row:auto;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;width:max-content;min-width:38px;max-width:max-content;height:38px;padding:0 9px;font-size:1.05rem;white-space:nowrap;box-sizing:border-box}.learn-lesson-list .lesson-row-inner strong{flex:0 0 auto;overflow:hidden;width:max-content;min-width:max-content;max-width:max-content;text-overflow:ellipsis;white-space:nowrap}.learn-lesson-list .lesson-row-inner small{flex:0 0 auto;width:max-content;max-width:max-content;white-space:nowrap;display:block;min-height:1.4em;overflow:hidden;text-overflow:ellipsis}.lesson-row.is-active{border-color:#1778bd70;background:#eef8fd;box-shadow:0 8px 18px #1778bd1a}.lesson-row-inner span{display:grid;grid-row:span 2;place-items:center;width:max-content;min-width:48px;height:48px;padding:0 10px;border-radius:8px;background:#fff9ec;color:var(--blue-dark);font-family:Songti SC,STSong,SimSun,serif;font-size:1.25rem;font-weight:900;white-space:nowrap;box-sizing:border-box}.lesson-row-inner strong{font-size:.98rem}.lesson-row-inner small{overflow:hidden;color:var(--muted);font-size:.78rem;text-overflow:ellipsis;white-space:nowrap}.detail-panel{display:grid;gap:14px;padding:15px}.detail-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.detail-panel-head span{color:var(--muted);font-size:.78rem;font-weight:800}.detail-panel-head h2{margin-top:4px;font-size:1.22rem}.detail-showcase{display:grid;gap:12px}.detail-symbol{min-height:176px}.detail-info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.detail-actions{display:grid;grid-template-columns:1fr 1fr 1fr}.image-detail-card,.video-player-card{overflow:hidden}.image-detail-card img{width:100%;aspect-ratio:1 / 1;object-fit:cover}.video-player-wrap{position:relative;aspect-ratio:16 / 9;background:#132d3d}.video-player{display:block;width:100%;height:100%;object-fit:cover}.video-cover{position:absolute;top:0;right:0;bottom:0;left:0;display:block;overflow:hidden;border:0;background:#132d3d;padding:0}.video-cover:after{display:none}.video-cover .van-cell__title{width:100%;height:100%;line-height:normal}.video-cover-inner{position:relative;display:block;width:100%;height:100%}.video-cover-inner img{width:100%;height:100%;object-fit:cover}.video-cover.is-hidden{opacity:0;pointer-events:none}.image-detail-copy{display:grid;gap:8px;padding:14px 15px 15px}.image-detail-card .image-detail-copy,.video-player-card .image-detail-copy{gap:5px;padding-top:8px}.image-detail-copy h2{display:flex;align-items:center;gap:8px;font-size:1.26rem;font-weight:900}.detail-title-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.detail-title-row h2{min-width:0}.detail-title-main{display:flex;align-items:center;gap:8px;min-width:0}.teach-favorite-button{position:relative;z-index:2;display:inline-flex;align-items:center;justify-content:center;gap:5px;flex:0 0 auto;width:auto;min-width:58px;height:34px;margin-left:auto;margin-right:-6px;padding:0;border:0;border-radius:0;background:transparent;box-shadow:none;color:#8a7170;font-size:12px;font-weight:780;line-height:1;cursor:pointer;-webkit-tap-highlight-color:transparent}.teach-favorite-button.is-favorite{border:0;background:transparent;color:var(--mall-primary-dark, #d9572f)}.teach-favorite-button .van-button__content{width:100%;height:100%}.teach-favorite-button .van-icon{display:block;color:inherit;font-size:22px;line-height:1}.teach-favorite-button svg{display:block;width:21px;height:21px;color:inherit}.teach-favorite-button>span{display:block;color:inherit;white-space:nowrap}.teach-favorite-button:disabled{cursor:default;opacity:.72}.video-title-pinyin,.image-title-pinyin{color:#604a36a8;font-size:.96rem;font-weight:750;line-height:1.25}.vip-title-tag{display:inline-flex;align-items:center;justify-content:center;min-height:20px;padding:2px 8px;border-radius:999px;background:linear-gradient(135deg,#ffd166,#ef8742);color:#fff;font-size:.68rem;font-weight:900;line-height:1}.lesson-title{display:flex;align-items:center;justify-content:space-between;gap:12px}.lesson-title h1{font-size:1.45rem}.progress-pill{display:inline-flex;align-items:center;justify-content:center;min-width:72px;padding:7px 10px;text-align:center;font-size:.82rem;font-weight:800}.learning-card{display:grid;gap:14px;padding:16px}.symbol-card{display:grid;min-height:248px;place-items:center;overflow:hidden;border:1px solid rgba(226,234,240,.92);border-radius:var(--radius);background:linear-gradient(45deg,transparent 49.5%,rgba(97,114,125,.24) 50%,transparent 50.5%),linear-gradient(135deg,transparent 49.5%,rgba(97,114,125,.24) 50%,transparent 50.5%),linear-gradient(180deg,#fffdf7,#fff9ec)}.symbol{display:grid;gap:4px;place-items:center;text-align:center}.symbol small{color:var(--blue-dark);font-size:1rem;font-weight:800}.symbol strong{display:block;font-size:clamp(4.5rem,21vw,5.8rem);line-height:1.38;font-family:Songti SC,STSong,SimSun,serif}.lesson-meta{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.meta-item{min-height:74px;padding:12px;border-radius:var(--radius);background:linear-gradient(180deg,#f7fbfd,#f1f7f4)}.meta-item span{display:block;color:var(--muted);font-size:.78rem}.meta-item strong{display:block;margin-top:5px;font-size:1.05rem}.lesson-body{display:grid;gap:10px;line-height:1.72}.lesson-body h3{margin:0;font-size:1rem}.lesson-body p{margin:0;color:var(--muted)}.plan-list,.profile-stats{display:grid;gap:12px}.plan-card{padding:16px 16px 14px;border-color:var(--card-border);transition:transform .16s ease,box-shadow .16s ease}.plan-card.is-free{position:relative;overflow:hidden;padding-bottom:10px;border-color:#3dae6647;background:radial-gradient(circle at 95% 0%,rgba(61,174,102,.16),transparent 7rem),linear-gradient(135deg,#f2fbf6,#fff)}.plan-card.is-free p{line-height:1.45}.plan-card.is-free:after{content:"免费";position:absolute;top:12px;right:12px;padding:4px 8px;border-radius:999px;background:#3dae661f;color:#237a43;font-size:.72rem;font-weight:850}.plan-card.is-featured{position:relative;overflow:hidden;border-color:#ef874257;background:radial-gradient(circle at 95% 0%,rgba(255,209,102,.28),transparent 8rem),linear-gradient(135deg,#fff8ee,#fff)}.plan-card.is-featured:after{content:"推荐";position:absolute;top:12px;right:12px;padding:4px 8px;border-radius:999px;background:#ef87421f;color:#bc5f24;font-size:.72rem;font-weight:850}.plan-card.is-premium{position:relative;overflow:hidden;border-color:#476cb04d;background:radial-gradient(circle at 95% 0%,rgba(198,164,92,.22),transparent 8rem),linear-gradient(135deg,#f4f7ff,#fff)}.plan-card.is-premium:after{content:"尊享";position:absolute;top:12px;right:12px;padding:4px 8px;border-radius:999px;background:#476cb01f;color:#385f9d;font-size:.72rem;font-weight:850}.plan-card.is-premium .tier-price{color:#9b6a20}.plan-card h3{margin:0 0 7px;font-size:1.06rem;font-weight:850}.plan-card p{margin:0;color:var(--muted);line-height:1.6;font-size:.88rem}.plan-price-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:13px;padding-top:12px;border-top:1px solid rgba(226,234,240,.78)}.tier-list{display:grid;gap:8px;margin-top:12px}.tier-row{display:grid;grid-template-columns:1fr auto auto;gap:10px;align-items:center;min-height:44px;padding:8px 12px;border:1px solid rgba(226,234,240,.88);border-radius:8px;background:#ffffffc7}.tier-row strong{font-size:.94rem}.tier-price{color:var(--orange);font-size:1.12rem;font-weight:900;white-space:nowrap}.literacy-page{display:grid;gap:18px;padding-bottom:18px}.literacy-card-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.literacy-word-card{position:relative;display:grid;place-items:center;min-width:0;aspect-ratio:1.42 / 1;border:1px solid #8c8c8c;background:linear-gradient(to bottom right,transparent calc(50% - .6px),#8c8c8c calc(50% - .6px),#8c8c8c calc(50% + .6px),transparent calc(50% + .6px)),linear-gradient(to top right,transparent calc(50% - .6px),#8c8c8c calc(50% - .6px),#8c8c8c calc(50% + .6px),transparent calc(50% + .6px)),#f7f7f7;color:#30343a}.literacy-word-card.is-active{border-color:#58cf5a;background:linear-gradient(to bottom right,transparent calc(50% - .6px),#52bd63 calc(50% - .6px),#52bd63 calc(50% + .6px),transparent calc(50% + .6px)),linear-gradient(to top right,transparent calc(50% - .6px),#52bd63 calc(50% - .6px),#52bd63 calc(50% + .6px),transparent calc(50% + .6px)),#90ff00;color:#0fa5dc}.literacy-word-card span{font-size:.88rem;font-weight:800;line-height:1}.literacy-word-card strong{margin-top:-4px;font-family:Songti SC,STSong,SimSun,serif;font-size:1rem;font-weight:900;line-height:1}.literacy-detail{display:grid;grid-template-columns:104px 1fr;gap:14px 18px;align-items:center}.hanzi-grid,.stroke-hanzi{position:relative;display:grid;place-items:center;border:2px solid #54cf80;border-radius:8px;background:linear-gradient(to bottom right,transparent calc(50% - .5px),rgba(184,184,184,.72) calc(50% - .5px),rgba(184,184,184,.72) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(to top right,transparent calc(50% - .5px),rgba(184,184,184,.72) calc(50% - .5px),rgba(184,184,184,.72) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(90deg,transparent calc(50% - .5px),rgba(184,184,184,.38) calc(50% - .5px),rgba(184,184,184,.38) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(180deg,transparent calc(50% - .5px),rgba(184,184,184,.38) calc(50% - .5px),rgba(184,184,184,.38) calc(50% + .5px),transparent calc(50% + .5px)),#fff}.hanzi-grid{width:104px;height:124px}.hanzi-grid strong{color:#050505;font-family:Songti SC,STSong,SimSun,serif;font-size:4.6rem;font-weight:900;line-height:1}.literacy-pronounce{display:inline-flex;align-items:center;width:fit-content;gap:6px;min-height:44px;padding:0 10px;background:repeating-linear-gradient(180deg,transparent 0 13px,rgba(92,205,142,.25) 13px 15px)}.literacy-pronounce strong{font-size:1.1rem;font-weight:900}.literacy-pronounce button{display:grid;place-items:center;border:0;background:transparent;color:#34495e;padding:0;font-size:1.1rem}.literacy-meta{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 18px;margin:0}.literacy-meta div{display:grid;grid-template-columns:36px minmax(0,1fr);gap:8px;align-items:baseline}.literacy-meta dt{color:#8f98a5;font-size:.82rem;font-weight:850}.literacy-meta dd{margin:0;color:#111827;font-size:.92rem;font-weight:850}.literacy-section{display:grid;gap:12px}.literacy-section h2{margin:0;font-size:1.15rem;font-weight:900}.stroke-strip{display:flex;flex-wrap:wrap;gap:10px;overflow:visible;padding-bottom:0;scrollbar-width:none}.stroke-strip::-webkit-scrollbar{display:none}.stroke-card{flex:0 0 58px;display:block;text-align:center}.stroke-hanzi{position:relative;width:58px;height:74px;border:1px solid #d0d5dd;border-radius:8px;background:#f8fafc;overflow:hidden}.stroke-hanzi:after{position:absolute;right:0;bottom:22px;left:0;height:1px;background:#d0d5dd;content:""}.stroke-hanzi svg{position:absolute;top:4px;right:5px;bottom:23px;left:5px;z-index:1;width:calc(100% - 10px);height:calc(100% - 27px)}.stroke-path{stroke:none}.stroke-path.is-future{fill:#d3d8df}.stroke-path.is-done{fill:#202733}.stroke-path.is-current{fill:#ff2d2d}.stroke-hanzi span{position:absolute;top:4px;right:5px;bottom:23px;left:5px;z-index:1;display:grid;place-items:center;color:#00000047;font-family:Songti SC,STSong,SimSun,serif;font-size:2rem;font-weight:900}.stroke-hanzi i{position:absolute;z-index:1;right:0;bottom:0;left:0;display:grid;height:22px;place-items:center;color:#8b95a1;font-style:normal;font-size:.72rem;font-weight:800;text-align:center}.hanzi-stroke-empty{display:grid;place-items:center;min-height:86px;border-radius:var(--radius);background:#f3f6fa;color:#8793a2;font-size:.82rem;font-weight:850}.writing-writer{min-height:332px}.hanzi-writer-shell{--writer-size: 168px;--writer-rgb: 107, 114, 128;--writer-color: #6b7280;position:relative;display:grid;gap:12px}.hanzi-writer-target{position:relative;width:min(100%,var(--writer-size));aspect-ratio:1;justify-self:center;overflow:hidden;border:1px solid rgba(23,120,189,.18);border-radius:var(--radius);background:radial-gradient(circle at 50% 45%,rgba(var(--writer-rgb),.12),rgba(var(--writer-rgb),.04) 50%,transparent 73%),linear-gradient(to bottom right,transparent calc(50% - .5px),rgba(23,120,189,.16) calc(50% - .5px),rgba(23,120,189,.16) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(to top right,transparent calc(50% - .5px),rgba(23,120,189,.16) calc(50% - .5px),rgba(23,120,189,.16) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(90deg,transparent calc(50% - .5px),rgba(23,120,189,.1) calc(50% - .5px),rgba(23,120,189,.1) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(180deg,transparent calc(50% - .5px),rgba(23,120,189,.1) calc(50% - .5px),rgba(23,120,189,.1) calc(50% + .5px),transparent calc(50% + .5px)),#f8fbfd}.hanzi-writer-target svg{position:relative;z-index:1;width:100%;height:100%}.hanzi-writer-fallback{position:absolute;top:0;left:50%;width:min(100%,var(--writer-size));aspect-ratio:1;transform:translate(-50%);display:grid;align-content:center;justify-items:center;gap:4px;pointer-events:none}.hanzi-writer-fallback strong{color:var(--writer-color);font-size:4.2rem;font-weight:900;line-height:1;opacity:.36}.hanzi-writer-fallback span{color:#8793a2;font-size:.78rem;font-weight:800}.hanzi-writer-actions{display:flex;justify-content:center;gap:10px}.hanzi-writer-actions .van-button{min-width:72px;border-radius:999px;font-weight:850}.literacy-page{gap:14px}.literacy-category-bar{position:sticky;top:0;z-index:20;width:calc(100% + 32px);margin:0 -16px;padding:10px 12px 12px;overflow:hidden;border-bottom:1px solid rgba(164,214,229,.7);background:linear-gradient(180deg,#fff,#eefaf7);box-shadow:0 8px 18px #429bb114;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.literacy-category-scroll{display:flex;gap:8px;width:100%;min-width:0;max-width:100%;overflow-x:auto;overflow-y:hidden;padding:0 0 0 4px;overscroll-behavior-x:contain;scroll-padding-inline:4px 10px;scrollbar-width:none;touch-action:pan-x;-webkit-overflow-scrolling:touch}.literacy-category-scroll::-webkit-scrollbar{display:none}.literacy-category-scroll:after{content:"";flex:0 0 10px}.literacy-category-button{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;min-width:78px;height:36px;padding:0 14px;border:1px solid rgba(23,120,189,.2);border-radius:999px;background:transparent;color:#5f7180;line-height:36px;box-shadow:none;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease}.literacy-category-button:active{transform:scale(.97)}.literacy-category-button:not(.is-active){background:#ffffffa3!important;border-color:#1778bd2e;box-shadow:none}.literacy-category-button{font-size:.88rem;font-weight:850;line-height:36px}.literacy-category-button.is-active{border-color:transparent;background:linear-gradient(135deg,#5aaee5,#67c9d8 54%,#74c994)!important;color:#fff;box-shadow:none!important}.literacy-card-scroll{position:relative;min-width:0}.literacy-card-scroll:after{content:"";position:absolute;top:0;right:-1px;bottom:4px;width:32px;pointer-events:none;opacity:0;background:linear-gradient(90deg,#f8fbfd00,#f8fbfdc7 76%,#f8fbfdf0);transition:opacity .18s ease}.literacy-card-scroll.has-scroll-hint:after{opacity:1}.literacy-card-grid{display:flex;gap:10px;overflow-x:auto;overscroll-behavior-x:contain;padding-bottom:4px;scroll-snap-type:x mandatory;scrollbar-width:none}.literacy-card-grid::-webkit-scrollbar{display:none}.literacy-card-page{display:grid;flex:0 0 100%;min-width:100%;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:repeat(3,78px);grid-auto-flow:row;grid-auto-rows:78px;align-content:start;gap:10px;scroll-snap-align:start}.literacy-word-card{display:block;aspect-ratio:auto;height:78px;min-height:78px;border:1px solid var(--card-border);border-radius:var(--radius);background:#fffffff5;box-shadow:var(--shadow-soft);color:var(--ink);overflow:hidden;padding:10px 8px;text-align:center}.literacy-word-card:after{display:none}.literacy-word-card.is-active{border-color:#1778bd6b;background:linear-gradient(180deg,#f0f9ff,#fff);color:var(--blue);box-shadow:0 8px 18px #1778bd1a}.literacy-word-card .van-cell__title{min-width:0}.literacy-word-inner{display:grid;gap:11px;place-items:center}.literacy-word-inner span{color:var(--muted);font-size:.95rem;font-weight:800;line-height:1}.literacy-word-inner strong{color:var(--ink);font-family:Songti SC,STSong,SimSun,serif;font-size:2rem;font-weight:900;line-height:1}.literacy-word-inner small{display:none;color:var(--muted);font-size:.76rem;font-weight:750;line-height:1.25}.literacy-word-card.is-active .literacy-word-inner span,.literacy-word-card.is-active .literacy-word-inner strong,.literacy-word-card.is-active .literacy-word-inner small{color:var(--blue)}.literacy-panel{border:1px solid var(--card-border);border-radius:var(--radius);background:#fffffff5;box-shadow:var(--shadow-soft)}.literacy-detail{grid-template-columns:112px minmax(0,1fr);gap:14px;align-items:stretch;padding:14px}.literacy-character-card{display:grid;gap:10px;align-content:start}.hanzi-grid{width:100%;height:124px;border:1px solid rgba(23,120,189,.22);border-radius:var(--radius);background:radial-gradient(circle at 50% 44%,rgba(var(--lesson-rgb, 23, 40, 51),.16),rgba(var(--lesson-rgb, 23, 40, 51),.05) 48%,transparent 72%),linear-gradient(135deg,rgba(var(--lesson-rgb, 23, 40, 51),.1),transparent 45%),linear-gradient(to bottom right,transparent calc(50% - .5px),rgba(23,120,189,.2) calc(50% - .5px),rgba(23,120,189,.2) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(to top right,transparent calc(50% - .5px),rgba(23,120,189,.2) calc(50% - .5px),rgba(23,120,189,.2) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(90deg,transparent calc(50% - .5px),rgba(23,120,189,.12) calc(50% - .5px),rgba(23,120,189,.12) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(180deg,transparent calc(50% - .5px),rgba(23,120,189,.12) calc(50% - .5px),rgba(23,120,189,.12) calc(50% + .5px),transparent calc(50% + .5px)),#f8fbfd}.hanzi-grid strong{color:var(--lesson-color, #172833);font-size:4.25rem;text-shadow:0 1px 2px rgba(23,40,51,.18)}.literacy-info-card{display:grid;gap:12px;min-width:0}.literacy-pronounce{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;width:auto;min-height:0;gap:8px;padding:0;background:transparent}.literacy-pronounce strong{color:var(--ink);font-size:1.45rem;line-height:1.15}.literacy-pronounce-text{display:inline-flex;align-items:baseline;min-width:0;gap:10px}.literacy-pronounce .van-button{flex-shrink:0;min-width:72px;border:1px solid rgba(23,120,189,.45);background:#fff;box-shadow:none;color:var(--blue);font-size:.82rem;font-weight:850}.literacy-pronounce .van-button__text{background:transparent;color:var(--blue);font-size:.82rem;font-weight:inherit;line-height:inherit;padding-bottom:0;text-shadow:none}.literacy-meta{gap:9px}.literacy-meta div{grid-template-columns:34px minmax(0,1fr);min-height:30px;align-items:center;border-radius:8px;background:#f6f8fb;padding:5px 7px}.literacy-meta dt{font-size:.74rem}.literacy-meta dd{overflow:hidden;font-size:.82rem;text-overflow:ellipsis;white-space:nowrap}.literacy-section{padding:14px}.literacy-section-title{display:flex;align-items:center;justify-content:space-between;gap:10px}.literacy-section h2{font-size:1rem}.stroke-count-tag{min-height:22px;padding:0 11px;font-size:.7rem;font-weight:700}.stroke-card{display:grid;flex:initial;gap:8px;min-width:0;text-align:center}.stroke-hanzi{position:relative;display:grid;grid-template-rows:1fr 24px;place-items:center;width:100%;height:100px;overflow:hidden;border:1px solid rgba(188,197,209,.98);border-radius:10px;background:linear-gradient(180deg,transparent calc(100% - 24px),rgba(221,226,235,.95) calc(100% - 24px),rgba(221,226,235,.95) calc(100% - 23px),#f3f6fb calc(100% - 23px)),linear-gradient(to bottom right,transparent calc(50% - .5px),rgba(105,121,133,.16) calc(50% - .5px),rgba(105,121,133,.16) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(to top right,transparent calc(50% - .5px),rgba(105,121,133,.16) calc(50% - .5px),rgba(105,121,133,.16) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(90deg,transparent calc(50% - .5px),rgba(105,121,133,.1) calc(50% - .5px),rgba(105,121,133,.1) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(180deg,transparent calc(50% - .5px),rgba(105,121,133,.1) calc(50% - .5px),rgba(105,121,133,.1) calc(50% + .5px),transparent calc(50% + .5px)),#f8fafc}.stroke-hanzi span{grid-row:1;align-self:center;color:#17222e38;font-family:Songti SC,STSong,SimSun,serif;font-size:2.75rem;font-weight:900;line-height:1}.stroke-hanzi i{display:grid;grid-row:2;grid-template-columns:1fr;place-items:center;width:100%;height:100%;color:#7f8c9d;font-style:normal;font-size:.88rem;font-weight:850;line-height:1;text-align:center}.literacy-section .word-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.literacy-section .word-item{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;background:#f3f5fa;border-radius:8px;border:1px solid #d4ddf0}.literacy-section .word-text{flex:1;font-size:14px;font-weight:600;color:#1f2937}.literacy-section .word-item .van-button{flex-shrink:0;padding:0 12px}.stroke-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;overflow:visible;padding-bottom:0}.member-banner,.menu-section{border:1px solid var(--card-border);border-radius:var(--radius);background:#fffffff5;box-shadow:var(--shadow-soft)}.profile-hero{display:grid;grid-template-columns:76px minmax(0,1fr);gap:15px;align-items:center;min-height:104px;padding:14px;border:1px solid rgba(218,229,236,.72);border-radius:var(--radius);background:radial-gradient(circle at 96% 0%,rgba(35,138,208,.12),transparent 8rem),linear-gradient(135deg,#fffffff5,#f6fbfff5);box-shadow:var(--shadow-soft)}.avatar-button{position:relative;width:76px;height:76px;overflow:hidden;border:3px solid rgba(255,255,255,.92);border-radius:50%;background:#eaf5fb;padding:0;box-shadow:0 10px 22px #144a6c1f}.avatar-button img{width:100%;height:100%;object-fit:cover}.avatar-file-input{display:none}.avatar-loading{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#ffffffc2}.avatar-cropper-popup{left:50%;width:min(100%,var(--mobile-width));transform:translate(-50%);overflow:hidden;background:#101820}.avatar-cropper-panel{padding-bottom:calc(14px + env(safe-area-inset-bottom))}.avatar-cropper-head{display:grid;grid-template-columns:86px minmax(0,1fr) 86px;gap:8px;align-items:center;padding:12px;background:#fff}.avatar-cropper-head strong{color:var(--ink);font-size:1rem;font-weight:900;text-align:center}.avatar-cropper-head .van-button:last-child{justify-self:end}.avatar-cropper{width:100%;height:min(62vh,calc(100dvh - 180px),520px);background:#101820;touch-action:none;-webkit-user-select:none;user-select:none}.avatar-cropper .vue-advanced-cropper__boundaries,.avatar-cropper .vue-advanced-cropper__cropper-wrapper{touch-action:none}.avatar-cropper .vue-simple-handler{width:18px;height:18px;border:3px solid #ffffff;border-radius:50%;background:var(--blue);box-shadow:0 2px 8px #00000047}.avatar-cropper-tools{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:12px;color:#ffffffe6;font-size:.82rem}.avatar-zoom-button{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;padding:0;border:1px solid rgba(255,255,255,.46);border-radius:50%;background:#ffffff1f;color:#fff;font-size:1.25rem;line-height:1;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.avatar-cropper-panel>p{margin:12px 16px 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