:root{font-family:Inter,"Segoe UI",Arial,sans-serif;color:#292b39;background:#faf9f6;font-synthesis:none;scroll-behavior:smooth}*{box-sizing:border-box}body{margin:0;min-width:310px}button,input,select{font:inherit}button{cursor:pointer}a{text-decoration:none;color:inherit}a:hover,button:hover{transition:.18s}h1,h2,h3,h4,p{margin-top:0}h1{font-size:31px;letter-spacing:-1.05px;line-height:1.3}h2{font-size:18px;letter-spacing:-.35px}h3{font-size:14px}p{line-height:1.75}.app-layout{display:flex;min-height:100vh}.sidebar{width:249px;flex:0 0 249px;background:#fff;border-right:1px solid #eeede8;display:flex;flex-direction:column;padding:24px 15px 18px;position:sticky;top:0;height:100vh;z-index:30;overflow-y:auto}.identity{display:flex;align-items:center;gap:11px;margin:3px 10px 30px}.identity-icon{display:grid;place-items:center;background:#ffe5a5;color:#a86d03;border-radius:14px;width:43px;height:43px;font-size:25px;box-shadow:0 6px 16px #c99d3a22}.identity strong{font-size:22px;display:block;letter-spacing:-.9px;color:#263347}.identity small{display:block;font-size:10px;color:#9ca4a9;margin-top:2px}.sidebar-caption{font-size:10px;font-weight:800;letter-spacing:1.1px;color:#a3a7b1;margin:9px 16px 10px}.nav-group{display:grid;gap:3px;margin-bottom:24px}.nav-group a{display:flex;align-items:center;gap:12px;color:#707888;padding:11px 12px;border-radius:11px;font-weight:650;font-size:12px;line-height:1.3}.nav-group a:hover{background:#fff9ea;color:#aa7609}.nav-group a.active{background:#fff3d2;color:#9c6c0e;font-weight:750}.nav-ico{font-size:18px;font-weight:500;display:inline-grid;place-items:center;width:24px;flex:0 0 24px}.sidebar-bottom{margin-top:auto;border-radius:18px;padding:16px 15px;background:linear-gradient(160deg,#fff5d9,#fce6b9);border:1px solid #f8e1a9}.tiny-bumble{font-size:33px;margin-bottom:8px}.sidebar-bottom strong{font-size:13px;color:#775522}.sidebar-bottom p{font-size:11px;color:#a0824d;margin:8px 0 12px}.sidebar-start{display:flex;justify-content:space-between;font-size:11px;font-weight:800;color:#9c6b0f}.sidebar-foot{color:#a8aaad;text-align:center;font-size:9px;padding-top:17px}.workspace{min-width:0;flex:1}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 35px;border-bottom:1px solid #eeede9;background:#ffffffed;position:sticky;top:0;z-index:20;backdrop-filter:blur(16px)}.crumb-label{color:#a0a1a6;font-size:12px}.crumb-label span{margin:0 10px;color:#c6c8ca}.crumb-label b{color:#454c5a}.top-right{display:flex;align-items:center;gap:18px}.date-pill{color:#7b838c;font-size:11px;font-weight:600}.top-streak{color:#826b45;border:1px solid #f3e3b7;background:#fffaef;padding:8px 12px;border-radius:50px;font-size:12px}.avatar{width:33px;height:33px;display:grid;place-items:center;color:#aa7709;font-weight:900;background:#fde5a7;border-radius:50%;font-size:11px}.mobile-menu{display:none;border:none;background:transparent;color:#4d5360;font-size:21px}.main-content{max-width:1510px;margin:auto;padding:33px 37px 52px;min-height:calc(100vh - 144px)}.site-footer{text-align:center;font-size:10px;color:#a9a9ad;padding:18px 20px 28px;border-top:1px solid #eeece7}.site-footer a{color:#9b780f}.section-kicker{font-size:11px;color:#bc8d2c;font-weight:900;letter-spacing:1.1px;text-transform:uppercase;margin:0 0 7px}.page-heading{margin-bottom:24px;display:flex;align-items:end;justify-content:space-between;gap:15px}.page-heading p{font-size:12px;color:#8c929c;margin:8px 0 0}.muted{color:#929aa4;font-size:11px}.subheading{display:flex;align-items:center;justify-content:space-between;margin:28px 0 16px}.subheading h2{margin:0}.subheading a,.subheading button{color:#bc8b21;font-size:11px;font-weight:750;border:0;background:none}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.75fr) minmax(300px,.84fr);gap:22px;align-items:start}.col-stack{display:grid;gap:18px;min-width:0}.hero{position:relative;overflow:hidden;min-height:252px;border-radius:24px;background:linear-gradient(115deg,#f6d48f 0%,#ffe2af 52%,#fff1cb 100%);padding:33px 33px 31px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 12px 33px #caa76b18}.hero:after{content:"";position:absolute;width:370px;height:370px;border:1px solid #e9b95f55;border-radius:50%;right:-155px;top:-90px;box-shadow:0 0 0 31px #ffffff32,0 0 0 80px #ffffff24}.hero-copy{z-index:2;max-width:405px}.hero .eyebrow{font-size:11px;font-weight:900;letter-spacing:.8px;color:#a76a12}.hero h1{font-size:32px;margin:11px 0 10px;color:#4c382b;max-width:390px}.hero p{color:#8f6f41;font-size:12px;line-height:1.7;max-width:380px;margin-bottom:22px}.hero-glyph{font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;font-size:137px;font-weight:850;color:#ffffff9b;text-shadow:7px 12px 1px #e6b4595e;transform:rotate(-12deg);margin:0 40px 0 10px;z-index:1}.btn{background:#e3a437;border:1px solid #e3a437;color:#fff;border-radius:10px;font-size:12px;font-weight:800;padding:12px 18px;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn:hover{background:#cb8e22;transform:translateY(-1px)}.btn.dark{background:#473c36;border-color:#473c36}.btn.dark:hover{background:#2a2624}.btn.outline{background:#fff;color:#a77820;border-color:#f1dfb9}.btn.muted-btn{background:#f7f6f2;color:#666d7b;border-color:#eeece9}.btn.sm{padding:9px 12px;font-size:11px}.btn:disabled{opacity:.48;cursor:not-allowed;transform:none}.stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.stat-card{border:1px solid #edeae4;background:#fff;border-radius:17px;padding:18px;display:flex;align-items:center;gap:13px}.stat-symbol{width:44px;height:44px;display:grid;place-items:center;font-size:22px;border-radius:13px;flex-shrink:0}.stat-symbol.sun{background:#fff2d9}.stat-symbol.mint{background:#e9f8f1}.stat-symbol.purple{background:#f0ebff}.stat-card small{font-size:10px;color:#929aab;display:block;margin-bottom:7px}.stat-card b{font-size:20px;letter-spacing:-.4px}.card{background:#fff;border:1px solid #edece8;border-radius:18px;padding:20px;min-width:0}.card-header{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:17px}.card-header h2{margin:0}.card-header a{font-size:11px;color:#aa7920;font-weight:800}.lesson-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.lesson-tile{min-width:0;padding:18px 15px;background:#fff;border:1px solid #ecebe6;border-radius:16px}.lesson-tile .tile-art{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-size:22px;background:#f9f1df;margin-bottom:15px}.lesson-tile:nth-child(3n + 2) .tile-art{background:#e8f7f0}.lesson-tile:nth-child(3n + 3) .tile-art{background:#eceeff}.lesson-tile .tag{color:#bf8b2e;font-size:9px;font-weight:850;margin-bottom:8px;display:block}.lesson-tile h3{font-size:12px;margin:0 0 7px;line-height:1.5}.lesson-tile p{font-size:10px;color:#949aa5;min-height:34px;line-height:1.65;margin-bottom:12px}.lesson-tile .text-link{color:#ba8421;font-size:10px;font-weight:800}.hsk-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.hsk-card{display:flex;align-items:center;gap:13px;padding:15px;border:1px solid #eae9e5;background:#fff;border-radius:14px;cursor:pointer;text-align:left}.hsk-card:hover{border-color:#e3bb73;background:#fffaf1}.hsk-card i{display:grid;place-items:center;flex:0 0 43px;width:43px;height:43px;background:#fff2db;border-radius:11px;font:700 21px "Microsoft YaHei","Noto Sans SC",sans-serif;color:#b78119}.hsk-card:nth-child(3n + 2) i{background:#e8f7ef;color:#32976c}.hsk-card:nth-child(3n + 3) i{background:#eee9ff;color:#8c70bf}.hsk-card strong{font-size:11px;display:block}.hsk-card small{display:block;font-size:10px;color:#9ba1a7;margin-top:5px}.small-progress{height:7px;background:#f5f2eb;border-radius:99px;overflow:hidden}.small-progress>i{height:100%;display:block;background:#e5ae4a;border-radius:99px;transition:width .2s}.right-card-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.right-card-heading h2{margin:0}.right-card-heading small{font-size:10px;color:#999ba5}.week-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin:18px 0 9px}.day-unit{text-align:center;display:grid;gap:8px}.day-unit b{font-weight:650;color:#a4a6ad;font-size:10px}.day-mark{height:30px;width:30px;margin:auto;display:grid;place-items:center;background:#f3f1ec;border-radius:50%;font-size:11px;color:#a9a8ab}.day-mark.done{background:#e3b34c;color:#fff}.progress-summary{background:#fdf9f0;border-radius:13px;padding:13px;font-size:11px;color:#90713d;line-height:1.7}.challenge-row{display:flex;gap:12px;align-items:center;border-bottom:1px solid #f3f1eb;padding:12px 0}.challenge-row:last-child{border:none}.checkmark{display:grid;place-items:center;width:29px;height:29px;border-radius:50%;background:#f5f2eb;color:#ada9a0;flex:0 0 29px;font-size:13px}.checkmark.done{background:#e5f7ed;color:#279a68}.challenge-row>div{flex:1}.challenge-row strong{display:block;font-size:11px;margin-bottom:4px}.challenge-row small{font-size:10px;color:#9ea4aa}.challenge-progress{color:#c18a27;font-size:11px;font-weight:800}.notice{background:#fff8ec;border:1px solid #f2e2bf;border-radius:13px;padding:14px 17px;color:#987c44;font-size:11px;line-height:1.8;margin:17px 0}.progress-bar{height:7px;border-radius:30px;background:#f2efe8;overflow:hidden}.progress-bar i{display:block;background:linear-gradient(90deg,#f4bc54,#d99823);height:100%;border-radius:30px}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:16px 0}.toolbar input,.toolbar select,.field{background:#fff;border:1px solid #e5e5df;border-radius:11px;padding:12px 13px;color:#4b5260;font-size:12px;outline:none}.toolbar input:focus,.toolbar select:focus,.field:focus{border-color:#e0b25f;box-shadow:0 0 0 3px #f5e2b654}.toolbar input{min-width:220px;flex:1}.toolbar select{max-width:200px}.word-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.word-card{background:#fff;border:1px solid #eceae5;border-radius:15px;padding:18px;min-width:0;display:flex;flex-direction:column;gap:9px}.word-card .hanzi{font-size:28px;font-weight:700;color:#574332;font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;word-break:break-word}.word-card .pinyin{font-size:11px;color:#ad7b27}.word-card .eng{font-size:10px;color:#87909c;line-height:1.7;flex:1;overflow-wrap:anywhere}.word-actions{display:flex;justify-content:space-between;gap:7px}.icon-button{width:34px;height:32px;border:1px solid #eeece6;background:#fffaf1;border-radius:9px;color:#a57923;font-size:15px}.icon-button.active{color:#b86c00;background:#fff0ce}.pager{display:flex;align-items:center;justify-content:center;gap:17px;margin:22px auto;font-size:11px;color:#959aa4}.lesson-layout{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.unit-card{background:#fff;border:1px solid #ecebe7;border-radius:16px;padding:19px}.unit-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:15px}.unit-top .unit-num{font-weight:900;font-size:24px;color:#ddad56}.unit-tag{font-size:10px;color:#8f997f;background:#eef4e7;border-radius:20px;padding:5px 10px}.unit-card h3{font-size:14px;margin:0 0 8px}.unit-card p{font-size:11px;color:#9ca1a9;line-height:1.7}.unit-card .progress-bar{margin:13px 0}.unit-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#999aa1;font-size:10px;margin-top:13px}.lesson-detail-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:15px}.lesson-detail-head button{border:0;background:transparent;color:#ab7b25;font-weight:700;font-size:11px}.phrase-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.phrase-card{display:flex;align-items:center;gap:13px;background:#fff;border:1px solid #ebebe7;border-radius:14px;padding:17px}.phrase-card .cn{font-size:20px;font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;font-weight:700;margin-bottom:7px}.phrase-card .py{font-size:11px;color:#b8852e;margin-bottom:5px}.phrase-card .vi{font-size:11px;color:#818a96}.phrase-card>div{flex:1}.grammar-note{background:#eff8f0;border:1px solid #daecdc;color:#63816b;padding:16px;border-radius:13px;margin:16px 0;font-size:11px;line-height:1.7}.quiz-area{max-width:810px;margin:auto}.quiz-top{display:flex;justify-content:space-between;color:#a1a3aa;font-size:11px;font-weight:750;margin-bottom:15px}.quiz-question{font:750 29px/1.55 "Noto Sans SC","Microsoft YaHei",sans-serif;text-align:center;margin:24px 0;color:#5d4229;word-break:break-word}.quiz-caption{text-align:center;font-size:12px;color:#8d96a3;margin:12px 0 25px}.option-list{display:grid;gap:10px;margin:20px 0}.option{background:#fff;border:1px solid #e6e6e2;border-radius:12px;text-align:left;padding:15px 17px;font-size:12px;color:#525c66;line-height:1.65}.option:hover:enabled{background:#fff9ee;border-color:#edcb81}.option.correct{border-color:#70c59a;background:#e9f9ef;color:#20774d}.option.wrong{border-color:#edaba9;background:#fff0ec;color:#b4544e}.option:disabled{cursor:default}.feedback{background:#f6f9f4;border:1px solid #e0ebd9;padding:14px;border-radius:11px;font-size:12px;line-height:1.7;margin:10px 0 15px}.quiz-actions{display:flex;justify-content:space-between;flex-wrap:wrap;gap:11px;margin:20px 0}.center{text-align:center}.display-hanzi{font:800 52px/1.3 "Noto Sans SC","Microsoft YaHei",sans-serif;color:#674b31;word-break:break-word}.display-pinyin{font-size:17px;color:#be8b29;margin:14px 0}.display-en{font-size:13px;color:#737e8e;line-height:1.8}.flashcard{padding:42px 28px;background:linear-gradient(160deg,#fff,#fff7e4);border:1px solid #f3e3bc;border-radius:20px;text-align:center;min-height:260px;display:grid;align-content:center;gap:12px}.grades{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;margin-top:21px}.grades .btn{min-width:87px}.two-columns{display:grid;grid-template-columns:2fr 1fr;gap:19px}.lesson-intro{font-size:11px;color:#89929e;line-height:1.7}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.tone-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.tone-card{text-align:center;padding:16px 8px;border:1px solid #ece7df;border-radius:13px;background:#fff}.tone-card b{font-size:25px;color:#b97f22}.tone-card small{display:block;font-size:10px;color:#8993a2;line-height:1.6;margin-top:8px}.backup-buttons{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}.empty-state{text-align:center;color:#9398a1;padding:30px 17px;background:#fff;border:1px dashed #e6e6df;border-radius:15px;font-size:12px;line-height:1.75}.toast{position:fixed;bottom:27px;right:28px;max-width:340px;opacity:0;transform:translateY(10px);padding:13px 18px;background:#342f2c;color:#fff;font-size:12px;border-radius:12px;box-shadow:0 15px 35px #31291d40;z-index:80;pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translateY(0)}@media(max-width:1260px){.dashboard-grid{grid-template-columns:minmax(0,1fr)}.hsk-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.word-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:990px){.sidebar{position:fixed;left:-265px;box-shadow:8px 0 30px #2f2e2b15;transition:left .22s}.sidebar.open{left:0}.mobile-menu{display:block;margin-right:14px}.main-content{padding:27px 23px}.topbar{padding:0 22px}.lesson-cards{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:720px){.topbar{height:62px}.date-pill{display:none}.main-content{padding:20px 15px 38px}.page-heading{align-items:start}.page-heading h1{font-size:24px}.hero{padding:26px 23px;min-height:220px}.hero h1{font-size:25px}.hero-glyph{font-size:78px;margin:0 0 0 10px}.stat-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.stat-card{padding:12px 8px;gap:8px;display:block;text-align:center}.stat-symbol{margin:auto auto 9px;width:33px;height:33px;font-size:17px}.stat-card b{font-size:17px}.stat-card small{font-size:9px}.lesson-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.hsk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.word-grid,.lesson-layout,.phrase-list,.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tone-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.two-columns{grid-template-columns:1fr}.toolbar input{min-width:100%}.toolbar select{max-width:none;flex:1}.crumb-label{font-size:10px}}@media(max-width:480px){.hero-glyph{display:none}.lesson-cards,.word-grid,.phrase-list,.lesson-layout,.tool-grid{grid-template-columns:1fr}.top-streak{font-size:10px;padding:7px}.top-right{gap:8px}.main-content{padding:20px 12px}.hero{border-radius:19px}.stat-row{gap:5px}.stat-card{padding:10px 5px}.stat-card b{font-size:15px}.tone-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* Imported HSK lesson reader: structured text only, no source HTML execution */
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.course-card{border-radius:16px;border:1px solid #ede8dc;background:#fff;padding:19px;min-width:0;display:flex;flex-direction:column}
.course-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.course-round{display:grid;place-items:center;background:#fff3d6;color:#b67f24;border-radius:10px;width:43px;height:43px;font-size:17px;font-weight:850}
.course-tag{padding:6px 10px;border-radius:20px;color:#629274;background:#e6f5e9;font-size:10px;font-weight:700}
.course-card h3{margin:0 0 9px;font-size:14px;line-height:1.6;min-height:40px}
.course-card p{font-size:11px;color:#8e949c;flex:1}.course-card .btn{align-self:flex-start}
.course-vocab-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
.course-vocab{display:flex;flex-direction:column;gap:8px}
.course-word-head{display:flex;justify-content:space-between;gap:8px;align-items:start}
.course-word-head strong{font-size:28px;color:#544537;font-family:"Noto Sans SC","Microsoft YaHei",sans-serif}
.course-word-head .pinyin{display:block;font-size:11px;color:#b18335;line-height:1.65;margin-top:4px}
.course-vocab>p{font-size:13px;color:#454d5a;line-height:1.7}
.course-part{font-size:10px;color:#4a986c;display:inline-block;background:#effaf2;padding:4px 9px;border-radius:7px;align-self:flex-start}
.course-examples{border-top:1px solid #f0eee8;display:grid;gap:10px;margin-top:8px;padding-top:14px}
.course-examples>div{position:relative;padding-right:38px;line-height:1.65}
.course-examples span{font-size:15px;font-family:"Noto Sans SC","Microsoft YaHei";font-weight:650;display:block}
.course-examples small{display:block;color:#b38941;font-size:10px;margin-top:3px}
.course-examples p{color:#8b919d;font-size:11px;margin:5px 0 0}
.course-examples .icon-button{position:absolute;right:0;top:2px}
.course-grammar{margin-bottom:13px}
.course-grammar h3{font-size:16px}.course-grammar code{display:inline-block;color:#8a5d0e;background:#fff2d7;padding:6px 10px;border-radius:8px;font-size:12px;white-space:normal}
.course-grammar>p{font-size:12px;color:#737f8c;line-height:1.8;margin:14px 0}
.course-dialogue{margin-bottom:15px}
.course-dialogue>p{margin:10px 0}
.course-line{display:flex;gap:15px;align-items:start;padding:15px 0;border-top:1px solid #f2efe9}
.course-line .course-speaker{font-size:11px;font-weight:800;color:#8b692b;background:#fff4d7;padding:8px 10px;border-radius:11px;flex-shrink:0;max-width:72px;overflow-wrap:anywhere}
.course-line>div{flex:1;min-width:0}.course-line strong{font:650 16px/1.6 "Noto Sans SC","Microsoft YaHei",sans-serif}
.course-line .pinyin{font-size:10px;display:block;margin:4px 0;color:#b2833a}
.course-line p{font-size:11px;color:#828b99;margin:6px 0 0}
.course-line .icon-button{flex-shrink:0}
@media(max-width:1100px){.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.course-grid,.course-vocab-grid{grid-template-columns:1fr}.course-line{gap:9px}.course-line strong{font-size:14px}.course-card h3{min-height:0}}

/* BeeHọc grammar reference */
.grammar-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.grammar-tile{background:#fff;border:1px solid #edeae4;border-radius:15px;padding:18px;min-width:0;display:flex;flex-direction:column}
.grammar-tile-top{display:flex;justify-content:space-between;gap:10px;color:#ac893c;font-size:10px;font-weight:800;margin-bottom:12px}
.grammar-tile h3{font-size:16px;line-height:1.65;color:#44382b;word-break:break-word;min-height:50px}
.grammar-tile p{font-size:11px;color:#8b939d;flex:1}
.grammar-tile button{align-self:flex-start}
.grammar-point-title{font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;font-size:28px;overflow-wrap:anywhere;line-height:1.7}
.grammar-subtitle{font-size:13px;line-height:1.8;color:#666f7b}
.grammar-explain>p{font-size:13px;color:#5c6571;line-height:1.9}
.grammar-usage{margin-top:14px;border-top:1px solid #f0ece5}
.grammar-usage>div{display:grid;grid-template-columns:130px 1fr;gap:16px;padding:12px 0;border-bottom:1px solid #f1efeb}
.grammar-usage strong{font-size:11px;color:#94712b}.grammar-usage span{font-size:12px;color:#6d7480;line-height:1.8}
.grammar-examples{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.grammar-examples article{display:flex;align-items:start;gap:12px}
.grammar-index{display:grid;place-items:center;border-radius:7px;background:#fff2d4;color:#9d6a20;padding:8px;font-size:10px;font-weight:900}
.grammar-examples article>div{flex:1;min-width:0}
.grammar-examples strong{font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;font-size:17px;line-height:1.6;display:block;overflow-wrap:anywhere}
.grammar-examples small{font-size:11px;color:#aa853c;display:block;margin-top:5px}
.grammar-examples p{font-size:11px;color:#7d8897;line-height:1.8;margin:7px 0}
@media(max-width:1100px){.grammar-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.grammar-grid,.grammar-examples{grid-template-columns:1fr}.grammar-usage>div{grid-template-columns:1fr;gap:5px}.grammar-point-title{font-size:22px}}

/* BeeHọc reading comprehension */
.reading-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.reading-tile{background:#fff;border:1px solid #ece9e3;border-radius:16px;padding:19px;display:flex;flex-direction:column}
.reading-tile-top{display:flex;justify-content:space-between;color:#af8529;font-size:11px;font-weight:800;margin-bottom:13px}
.reading-tile h3{font-size:15px;color:#4e483f;line-height:1.55}
.reading-tile p{flex:1;font-size:11px;color:#89919b;line-height:1.7}
.reading-tile>.btn{align-self:flex-start}
.reading-sentences{display:grid;gap:12px}
.reading-sentence{display:flex;align-items:start;gap:14px}
.reading-sentence>div{min-width:0;flex:1}
.reading-sentence strong{display:block;font:600 21px/1.9 "Noto Sans SC","Microsoft YaHei",sans-serif;color:#493f34;overflow-wrap:anywhere}
.reading-sentence .pinyin{display:block;font-size:13px;color:#b3862d;line-height:1.9;margin-top:5px}
.reading-number{display:grid;place-items:center;width:31px;height:31px;flex:0 0 31px;background:#ffedc9;border-radius:9px;color:#b07817;font-weight:800;font-size:11px}
.reading-keywords{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}
.reading-keywords .eng{margin-bottom:3px}
@media(max-width:1080px){.reading-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reading-keywords{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:650px){.reading-grid{grid-template-columns:1fr}.reading-keywords{grid-template-columns:repeat(2,minmax(0,1fr))}.reading-sentence{gap:8px}.reading-sentence strong{font-size:17px}}
@media(max-width:420px){.reading-keywords{grid-template-columns:1fr}}

/* v0.6: source-attested vocabulary self-check within HSK reading passages */
.reading-quiz-intro{display:flex;align-items:center;gap:16px;justify-content:space-between}
.reading-quiz-intro p{flex:1;line-height:1.8;font-size:13px;color:#647080}
.reading-quiz-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0}
.reading-quiz-options button{min-height:48px;font:600 18px "Noto Sans SC","Microsoft YaHei",sans-serif;white-space:normal;word-break:break-word}
.reading-quiz-options button:disabled{opacity:.75;cursor:not-allowed}
.reading-quiz-question h3{font-size:17px;line-height:1.7}
.reading-quiz-feedback{background:#f3f8ed;color:#41612f;border-radius:11px;padding:12px;font-size:13px;font-weight:650}
.reading-quiz-result h3{font-size:22px}
@media(max-width:650px){.reading-quiz-intro{display:block}.reading-quiz-options{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* Bilingual HSK story library */
.story-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.story-tile{display:flex;flex-direction:column;min-width:0;background:#fff;border:1px solid #ece8df;border-radius:16px;padding:19px}
.story-tile-top{display:flex;gap:12px;justify-content:space-between;color:#a77925;font-size:11px;font-weight:750}
.story-tile h3{color:#493e34;font-size:17px;line-height:1.55;margin:15px 0 8px}
.story-tile p{flex:1;color:#738092;line-height:1.8;font-size:12px}
.story-tile small{color:#669779;font-size:11px;margin-bottom:11px}
.story-tile .btn{align-self:flex-start}
.story-summary{line-height:1.85;color:#677485;font-size:14px}
.story-section{display:grid;gap:12px;margin:22px 0}
.story-section h2{font-size:18px;line-height:1.6;color:#554837;margin:8px 0}
.story-line{display:flex;align-items:flex-start;gap:13px}
.story-index{display:grid;place-items:center;background:#fff2d7;color:#a4772d;min-width:31px;height:31px;border-radius:9px;font-size:11px;font-weight:750}
.story-line-main{min-width:0;flex:1}
.story-line-main strong{display:block;font:600 20px/1.85 "Noto Sans SC","Microsoft YaHei",sans-serif;overflow-wrap:anywhere}
.story-line-main small.pinyin{display:block;color:#a98137;font-size:12px;line-height:1.8}
.story-line-main p{font-size:13px;color:#768293;line-height:1.8;margin:8px 0 0}
.story-speaker{display:block;color:#669875;font-weight:700;font-size:11px;margin-bottom:6px}
.story-keywords{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.story-keywords .card{position:relative;padding-right:36px}
.story-keywords strong{font-family:"Noto Sans SC","Microsoft YaHei";font-size:20px;display:block}
.story-keywords .pinyin{display:block;color:#a98137;font-size:11px}
.story-keywords p{font-size:12px;color:#677485;line-height:1.65}
.story-keywords .icon-button{position:absolute;right:10px;top:10px}
.story-quiz-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0}
.story-quiz-options button{min-height:48px;font-size:18px;font-family:"Noto Sans SC","Microsoft YaHei";white-space:normal;overflow-wrap:anywhere}
@media(max-width:1050px){.story-grid,.story-keywords{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:650px){.story-grid,.story-keywords{grid-template-columns:1fr}.story-line{gap:7px}.story-line-main strong{font-size:16px}}

/* Vocabulary by theme: imported visible Chinese/Vietnamese source cards */
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.topic-tile{background:#fff;border:1px solid #ece9e3;border-radius:16px;padding:18px;min-width:0;display:flex;flex-direction:column}
.topic-tile-top{display:flex;justify-content:space-between;gap:8px;font-size:10px;font-weight:800;color:#aa8033;margin-bottom:12px}
.topic-tile h3{color:#493c33;font-size:17px;line-height:1.5}
.topic-tile p{color:#74808a;font-size:11px;flex:1}
.topic-tile>.btn{align-self:flex-start}
.topic-words{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.topic-word{position:relative;min-width:0;display:flex;flex-direction:column}
.topic-word>div:first-child{display:flex;align-items:center;justify-content:space-between;gap:8px}
.topic-word strong{font:600 24px/1.7 "Noto Sans SC","Microsoft YaHei",sans-serif;overflow-wrap:anywhere}
.topic-level{font-size:10px;color:#a57829;white-space:nowrap;background:#fdf4dc;padding:4px 7px;border-radius:8px}
.topic-word>.pinyin{color:#ab802e;font-size:12px;margin-top:3px}
.topic-word p{flex:1;color:#6d7884;line-height:1.7;font-size:12px}
.topic-actions{display:flex;gap:10px;margin-top:8px}
.topic-quiz-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;margin:15px 0}
.topic-quiz-grid button{font:600 18px/1.5 "Noto Sans SC","Microsoft YaHei",sans-serif;white-space:normal;overflow-wrap:anywhere;min-height:48px}
@media(max-width:1100px){.topic-grid,.topic-words{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:670px){.topic-grid,.topic-words{grid-template-columns:1fr}.topic-word strong{font-size:20px}}