
:root{color-scheme:light;--ink:#192e29;--muted:#536960;--green:#16624e;--paper:#f5f6f0;--line:#dbe6dd;--card:#fff;--gold:#ffcf77}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 system-ui,"Microsoft YaHei",sans-serif}a{color:var(--green)}button,select,input{font:inherit}button,select,.button{min-height:44px}button,.button,select{padding:.55em .95em;border:1px solid #bdcec2;border-radius:10px;color:var(--ink);background:white;cursor:pointer}.button{display:inline-flex;align-items:center;text-decoration:none;justify-content:center}.primary{color:white;background:var(--green);border-color:var(--green);font-weight:700}button:disabled{opacity:.5;cursor:default}:focus-visible{outline:3px solid #b36a0d;outline-offset:3px}h1,h2,h3,p{margin:0 0 .55em}h1{font-size:clamp(27px,5vw,42px);line-height:1.2}h2{font-size:23px}h3{font-size:17px}.wrap{width:min(100% - 32px,900px);margin:auto}header{background:#123c35;color:white}.mast{min-height:72px;display:flex;justify-content:space-between;align-items:center;gap:10px}.mast a{display:flex;align-items:center;gap:10px;color:white;text-decoration:none;font-weight:750}.logo{background:#def2e7;color:#194c3e;border-radius:10px;padding:7px 11px}.mast small{display:block;font-size:9px;letter-spacing:.14em;color:#c3ded1}.edition,.eyebrow{font-size:12px;letter-spacing:.1em}.edition{color:#e7f4e8}main{padding:25px 0 110px}.hero,.panel{padding:clamp(16px,4vw,30px);border-radius:18px;margin-bottom:16px}.hero{background:#194f42;color:white}.hero p{color:#e1f1e9}.hero .button{background:var(--gold);border:0;color:#20332c}.eyebrow{font-weight:700;margin-bottom:10px}.panel{border:1px solid var(--line);background:var(--card)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:12px}.grid .panel{margin:0}.row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:10px 0}.between{justify-content:space-between}.muted{color:var(--muted);font-size:.9rem}.tag{background:#e6f1e9;padding:4px 9px;border-radius:8px;font-size:13px;color:#225643}.seg[aria-pressed=true]{background:#d9efe2;border-color:#42836b;color:#123e31;font-weight:700}.bigword{font:700 clamp(28px,5vw,42px)/1.2 Georgia,serif;overflow-wrap:anywhere;margin:15px 0}.english,.passage{font:1.08rem/1.75 Georgia,"Times New Roman",serif}.passage p{text-indent:1.3em;white-space:pre-wrap}.passage p:first-child{text-indent:0}.blank{display:inline-block;border-bottom:1px solid #24463b;min-width:2.8em;text-align:center;color:#16624e;font:bold .85em system-ui;margin-inline:4px}.pre{white-space:pre-wrap;overflow-wrap:anywhere}.question{margin-top:16px;border-top:1px solid var(--line);padding-top:14px}.question legend{font-weight:700}.question input[type=text]{width:min(100%,380px);padding:10px;border:1px solid #aebfb5;border-radius:8px}.question input[type=radio]{accent-color:var(--green)}fieldset{min-width:0;border:0;padding:0;margin-inline:0}.option{display:flex;align-items:flex-start;gap:8px;padding:9px;border:1px solid var(--line);border-radius:8px;margin:6px 0;cursor:pointer}.option:has(input:checked){background:#e7f4eb;border-color:#5c947b}.answer-bad{color:#932f23}.answer-good{color:#16624e}summary{padding:9px 0;cursor:pointer;font-weight:700;color:var(--green)}blockquote{margin:12px 0;border-left:3px solid #89b7a0;background:#f1f7f2;padding:12px}nav{position:fixed;bottom:0;inset-inline:0;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.tabs{display:grid;grid-template-columns:repeat(4,1fr)}.tabs a{text-align:center;text-decoration:none;color:var(--muted);padding:6px 2px;font-size:13px}.tabs span{display:block;font-weight:800;font-size:18px;height:26px}.tabs a[aria-current=page]{color:#135942;background:#eaf4ec;font-weight:800}#toast{position:fixed;bottom:78px;left:50%;transform:translateX(-50%);max-width:90vw;background:#123c35;color:white;border-radius:9px;box-shadow:0 3px 14px #0003;z-index:5}#toast:not(:empty){padding:9px 14px}.offline{border-left:4px solid #5a9076}

