:root{--green:#23634d;--dark:#1d3028;--muted:#7a847d;--line:#e6e9e1;--bg:#f5f6f0;--soft:#edf2e8;--white:#fff;--accent:#dbe7ba;--radius:19px;font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--dark);font-size:14px;line-height:1.65;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,select{font:inherit}button,.button{cursor:pointer;border:1px solid var(--line);border-radius:10px;background:white;padding:10px 17px;color:var(--dark);font-weight:600;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:background .16s,border-color .16s,transform .16s}button:hover,.button:hover{border-color:#9bb69e;background:#f4f8ef}button:disabled{opacity:.5;cursor:wait}a{color:var(--green)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #b5c774;outline-offset:3px}input,select{width:100%;padding:11px 13px;border:1px 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9px;white-space:nowrap}.sidebar-note .tag{font-size:9px;padding:3px 7px;background:#f0f4e9}.sidebar-foot{font-size:9px;color:#a3ac9c;letter-spacing:1px;margin:40px 14px}.main-content{padding:36px 42px 0;min-width:0;max-width:1320px;width:100%;margin:0 auto}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.page-heading h1{margin-bottom:7px}.dot{color:#8da65c}.date-label{color:#8e9986;font-size:11px;letter-spacing:1px}.hero{background:var(--green);border-radius:var(--radius);position:relative;min-height:285px;display:flex;justify-content:space-between;overflow:hidden;margin-bottom:24px}.hero-copy{position:relative;z-index:1;padding:31px 37px;color:#fff}.hero-pill{font-size:10px;color:#d1e2b8;background:#ffffff0c;border:1px solid #ffffff25;border-radius:5px;padding:5px 9px;display:inline-block;margin-bottom:18px;letter-spacing:1px}.hero h2{font-size:32px;line-height:1.45;letter-spacing:1px}.hero p{font-size:11px;line-height:1.9;color:#b5cdb7;margin:13px 0 20px}.light-button{background:#e3eebf;color:#2b5035;border:none;font-size:11px;padding:10px 15px}.light-button span{margin-left:20px}.road-art{position:absolute;right:0;top:0;bottom:0;width:47%;overflow:hidden}.sun{position:absolute;width:68px;height:68px;border-radius:50%;background:#dfebae;right:24%;top:40px}.hill{position:absolute;width:330px;height:170px;background:#327258;border-radius:60% 60% 0 0;bottom:30px;transform:rotate(-14deg);right:-90px}.hill-two{background:#2b6b52;right:90px;bottom:-36px;width:320px;height:200px;transform:rotate(16deg)}.road{position:absolute;width:200px;height:390px;right:15%;top:118px;transform:rotate(-28deg);border:1px solid #66937688;background:#1f5943;border-radius:90px 90px 0 0;display:flex;flex-direction:column;align-items:center;padding-top:20px;gap:21px}.road 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#dfe5d8;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#819273;font-weight:600}.option.selected{background:#ecf3e4;border-color:#789b62}.option.selected>span:first-child{background:var(--green);border-color:var(--green);color:#fff}.option.answer-correct{border-color:#679963;background:#eff6e9}.option.answer-wrong{border-color:#cb986f;background:#fff4eb}.option:disabled{opacity:1;cursor:default}.answer-status{margin-top:18px;font-weight:600}.answer-status.correct{color:#4d7b37}.answer-status.wrong{color:#ac7450}.explanation{background:#f4f7ef;border:1px solid #e4eadb;border-radius:13px;padding:20px;margin-top:20px}.explanation h3{font-size:15px;margin-bottom:9px}.explanation p{white-space:pre-wrap;font-size:13px;line-height:1.9}.explanation .eyebrow{font-size:9px;letter-spacing:1.5px}.source-text{font-size:10px!important;color:#8e9b81;margin-top:14px}.question-controls{display:flex;gap:9px;flex-wrap:wrap;margin-top:27px}.question-controls 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small{font-size:10px;color:#919e87}td button{font-size:11px}.text-link{text-decoration:none;font-size:12px}.admin-main{max-width:1120px;padding:35px 30px;margin:auto}.admin-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:25px;gap:15px}.admin-tabs{display:flex;gap:24px;margin-bottom:24px;font-size:12px}.admin-tabs a{text-decoration:none}.bank-admin{padding:20px 0;border-top:1px solid var(--line)}.bank-admin h3{margin-bottom:4px}.bank-admin .button-row{margin-top:14px}.button-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.button-row form{margin:0}.button-row .button,.button-row button{font-size:11px}.bank-admin details{margin-top:14px}summary{cursor:pointer;font-size:12px;color:#8e9987}.admin-main form{display:flex;flex-direction:column;gap:15px;align-items:flex-start}.admin-main label{width:100%;font-weight:500}.admin-main form button{align-self:flex-start}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));width:100%;gap:16px}.admin-main .inline-form{flex-direction:row;align-items:end;flex-wrap:wrap;gap:14px}.inline-form label{width:220px}.inline-form button{align-self:flex-end!important}.checkbox{flex-direction:row;align-items:center;font-size:13px}.checkbox input{margin-right:7px}.admin-columns{display:grid;grid-template-columns:1fr 1fr;gap:24px}.admin-columns>.panel{margin-bottom:24px}.panel>h2{margin-bottom:15px}.panel>p{margin-bottom:17px}.import-preview{background:#f4f7ee;border:1px solid #dce7cc;border-radius:12px;padding:22px;margin-top:25px}.import-preview p{margin:9px 0}.import-preview .button-row{margin-top:18px}.auth-panel{max-width:460px;margin:35px auto}.auth-panel h1{font-size:26px;margin-bottom:15px}.auth-panel form{margin-top:22px}.danger{color:#ae6546!important}.admin-main table details form{min-width:180px;margin-top:10px}.admin-main table td:first-child{min-width:180px}.admin-main .panel{scroll-margin-top:20px}dialog{border:1px solid #dbe3d2;border-radius:22px;padding:30px;color:var(--dark);width:460px;max-width:calc(100% - 28px);max-height:90vh;overflow:auto;box-shadow:0 24px 90px #1c392436}dialog::backdrop{background:#17352d70;backdrop-filter:blur(3px)}.dialog-heading{display:flex;justify-content:space-between;align-items:start;margin-bottom:20px}.dialog-heading h2{font-size:26px}.dialog-heading>button{border:none;font-size:24px;line-height:1;padding:4px 9px;color:#8b9b7d}.auth-tabs{display:flex;background:#f2f5eb;border-radius:10px;padding:4px;margin-bottom:22px;gap:3px}.auth-tabs button{flex:1;font-size:12px;background:transparent;border-color:transparent;padding:8px 4px;color:#8c9a7f}.auth-tabs .selected{background:#fff;color:var(--green);border-color:#e2e8d8;box-shadow:0 2px 5px #233e2110}#authForm{display:flex;flex-direction:column;gap:16px}#authForm label{font-weight:500}.code-row{display:flex;gap:9px}.code-row 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@media(min-width:1450px){.main-content{padding-left:55px;padding-right:55px}.hero{min-height:310px}.hero-copy{padding:34px 42px}.hero h2{font-size:35px}.mode-card{padding:22px}.sidebar{padding-top:43px}}
@media(max-width:1100px){.app-layout{grid-template-columns:190px minmax(0,1fr)}.topbar{padding:0 26px}.sidebar{padding-left:15px;padding-right:15px}.nav-item{gap:8px;padding-left:10px}.nav-item.active::before{left:-16px}.main-content{padding:30px 26px 0}h1{font-size:26px}.hero-copy{padding:27px}.hero h2{font-size:29px}.road-art{right:-25px}.car{right:28%}.mode-grid{grid-template-columns:repeat(2,1fr)}.mode-card{padding:17px}.mode-card p{font-size:11px}.stat{padding:15px 16px}.stat strong{font-size:26px}.stat em{display:none}.panel{padding:23px}.practice-layout{grid-template-columns:1fr}.question-map>div{grid-template-columns:repeat(12,minmax(0,1fr));max-height:180px}.date-label{display:none}.bottom-note{display:block}.bottom-note>span:last-child{display:block;max-width:100%;text-align:left;margin-top:6px}}
@media(max-width:740px){.topbar{height:78px;padding:0 18px}.brand{font-size:18px;gap:10px}.brand img{width:38px;height:38px}.brand small{font-size:8px;letter-spacing:0}.sync-label{display:none}.top-actions{gap:5px}.account-button{font-size:10px;padding:8px 10px}.app-layout{display:block}.sidebar{padding:12px 14px;border-right:0;border-bottom:1px solid var(--line);min-height:0;background:#fff}.sidebar nav{flex-direction:row;overflow:auto;gap:6px;padding:2px}.nav-label,.sidebar-note,.sidebar-foot{display:none}.nav-item{flex:0 0 auto;width:auto;white-space:nowrap;font-size:11px;padding:8px 10px;gap:6px;border-radius:8px}.nav-item>span{font-size:16px;width:auto}.nav-item b{padding:0 4px;font-size:8px}.nav-item.active::before{display:none}.main-content{padding:25px 17px 0}.page-heading{margin-bottom:20px;align-items:flex-start}.page-heading h1{font-size:25px;letter-spacing:-.7px}.page-heading>.button,.page-heading>button{font-size:10px;white-space:nowrap;padding:9px}.page-heading .eyebrow{font-size:8px;letter-spacing:1.6px}.page-heading .muted{font-size:11px}.hero{min-height:300px;border-radius:16px;margin-bottom:18px}.hero-copy{padding:24px}.hero h2{font-size:28px}.hero p{font-size:10px}.hero-pill{font-size:8px;letter-spacing:.4px;padding:4px 6px}.road-art{width:49%;right:-35px;top:38px;opacity:.9}.sun{width:43px;height:43px;right:33%;top:10px}.car{transform:rotate(-28deg) scale(.75);right:23%;bottom:54px}.road{width:125px;right:17%;top:89px;transform:rotate(-25deg)}.art-caption{display:none}.hill{right:-150px;bottom:3px}.hill-two{right:-45px;bottom:-60px}.hero-copy{max-width:100%;width:100%}.hero h2{font-size:25px;letter-spacing:0}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:19px}.stat{padding:14px 17px;border-radius:12px}.stat>span{font-size:10px}.stat strong{font-size:26px}.stat small{font-size:10px}.stat em{display:inline;font-size:7px}.panel{border-radius:16px;padding:21px 18px;margin-bottom:19px}.section-heading{margin-bottom:19px;gap:7px}.section-heading h2{font-size:18px}.section-heading .eyebrow{font-size:8px;letter-spacing:1.5px}.section-heading>.tag{font-size:8px;padding:3px 6px}.filter-grid{grid-template-columns:1fr 1fr;gap:13px}.filter-grid label:nth-child(3){grid-column:1/-1}.filter-grid select{font-size:11px}.mode-grid{gap:10px}.mode-card{padding:15px 12px}.mode-card p{font-size:9px}.mode-card strong{font-size:12px}.mode-icon{width:32px;height:32px;font-size:21px;border-radius:9px;margin-bottom:11px}.mode-arrow{top:17px;right:13px}.search-field{margin-bottom:18px}.bottom-note{font-size:9px;margin-bottom:21px}.bank-note{font-size:9px}.question-panel h2{font-size:19px}.question-toolbar{gap:7px}.question-toolbar .muted{font-size:10px}.option{font-size:13px;padding:12px;gap:12px}.question-controls button{min-width:40%;font-size:11px}.question-map>div{grid-template-columns:repeat(8,minmax(0,1fr))}.question-panel .explanation{padding:16px}.admin-main{padding:24px 16px}.admin-heading h1{font-size:24px}.admin-columns{grid-template-columns:1fr;gap:0}.form-grid{grid-template-columns:1fr}.admin-tabs{gap:17px;overflow:auto;white-space:nowrap;font-size:11px}.admin-main .inline-form{flex-direction:column;align-items:stretch}.inline-form label{width:100%}.admin-main .inline-form button{align-self:flex-start!important}.admin-main .stat>span{font-size:10px}.import-preview{padding:16px}.auth-panel{margin-top:20px}dialog{padding:24px}footer{font-size:9px}footer span{font-size:8px}}

.compat-links{text-align:center;font-size:11px;margin:18px 0;color:#8e9a84}.compat-links a{color:#6f8760;text-decoration:none}
/* Appearance and site settings preserve the existing layout widths. */
.local-data{display:none!important}.appearance-open{position:fixed;right:20px;bottom:18px;z-index:12;font-size:12px;box-shadow:0 5px 25px #0002}.appearance-panel{display:none;position:fixed;right:20px;bottom:70px;width:370px;max-width:calc(100% - 32px);max-height:75vh;overflow:auto;border:1px solid var(--line);border-radius:16px;padding:22px;z-index:35;box-shadow:0 15px 70px #0003}.appearance-panel h2{font-size:18px;margin-bottom:8px}.appearance-panel p{font-size:12px;margin:12px 0}.appearance-panel form{display:block}.appearance-panel label{margin:12px 0 6px}.palette-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%;margin-bottom:16px}.palette-grid input[type=color]{width:100%;height:42px;padding:4px;cursor:pointer}.palette-grid label{width:auto}.appearance-panel .button-row{gap:7px}.appearance-panel button{padding:8px 10px;font-size:11px}.site-footer{margin-top:24px;padding-bottom:75px}.site-footer.align-left{text-align:left}.site-footer.align-center{text-align:center}.site-footer.align-right{text-align:right}.site-footer nav a{display:inline-block;margin:9px 10px 3px 0}.page-copy{white-space:normal;overflow-wrap:anywhere;line-height:1.95;margin-top:25px;font-size:15px}.admin-main textarea{font:inherit;width:100%;min-height:90px;border:1px solid var(--line);border-radius:10px;padding:12px;color:var(--dark);background:var(--white)}.admin-main .content-editor{min-height:230px}.admin-tabs{flex-wrap:wrap;row-gap:12px}.topic-chips{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0}.topic-chip{font-size:12px;padding:8px 12px}.topic-chip.selected{border:2px solid var(--green);background:var(--soft)}.topic-tools{margin:18px 0}.topic-tools details{margin:10px 0;padding:12px;border:1px solid var(--line);border-radius:9px}.topic-tools .inline-form{margin-top:12px}.topic-check{width:auto}.topic-table td:first-child{min-width:0;width:40px}.topic-table td input{width:auto}.topic-table td:nth-child(2){min-width:200px}.site-notice{white-space:pre-wrap}.hero-copy h2,.hero-copy p{white-space:pre-line}.brand img{object-fit:contain}.brand-preview{max-width:180px;max-height:70px;object-fit:contain}.admin-main .form-grid>label{width:100%}.content-page h1{overflow-wrap:anywhere}.topic-heading{margin-top:18px;margin-bottom:8px}button:focus-visible,a:focus-visible{outline-color:var(--green)}
@media(max-width:740px){.appearance-open{bottom:12px;right:12px}.appearance-panel{right:16px;bottom:60px}.topic-chips{gap:6px}.topic-chip{font-size:11px}.palette-grid{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:70px}}

.option.answer-correct{color:#24482b}.option.answer-wrong{color:#714228}.answer-status.correct,.answer-status.wrong{color:var(--dark)}.site-notice{margin-top:18px}.topic-chips{max-height:240px;overflow:auto}.filter-grid label{color:var(--muted)}.road-art .hill{background:var(--soft)}.road-art .hill-two{background:var(--green);opacity:.65}.road-art .road{background:var(--dark);opacity:.7}.hero h2{max-width:520px}.admin-main .palette-grid{max-width:650px}