.cc-root{--cc-ink:#173c37;--cc-green:#16776c;--cc-muted:#61746f;--cc-line:#d7e5df;--cc-paper:#fff;--cc-wash:#edf5f1;--cc-amber:#926313;max-width:1050px;margin:auto;color:var(--cc-ink);font:15px/1.75 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;padding-bottom:48px;min-width:0}
.cc-root *{box-sizing:border-box}.cc-root h1,.cc-root h2,.cc-root h3,.cc-root p{margin:0}.cc-root h1{font-size:clamp(28px,4vw,42px);line-height:1.35;letter-spacing:-.7px}.cc-root h2{font-size:21px;line-height:1.5}.cc-root h3{font-size:17px}.cc-root button,.cc-root input,.cc-root textarea,.cc-root select{font:inherit}.cc-root button{cursor:pointer}.cc-root button:disabled,.cc-root select:disabled{opacity:.6;cursor:wait}.cc-root :focus-visible{outline:3px solid #c4912e;outline-offset:3px}.cc-root small{font-size:12px;color:var(--cc-muted)}.cc-root h1 small{font-size:20px}.cc-root p{overflow-wrap:anywhere}.cc-root .cc-button{min-height:44px;padding:9px 16px;border:1px solid #a9c6ba;border-radius:8px;background:#fff;color:var(--cc-green);font-size:14px;font-weight:600}.cc-root .cc-primary{background:var(--cc-green);border-color:var(--cc-green);color:#fff}.cc-root .cc-button:hover:not(:disabled){box-shadow:0 2px 6px #173c3714;background:#eff7f3}.cc-root .cc-primary:hover:not(:disabled){background:#105d54}.cc-kicker{display:block;font-size:12px;font-weight:700;letter-spacing:1.2px;color:var(--cc-green);margin-bottom:12px}.cc-status{min-height:34px;color:var(--cc-muted);font-size:12px}.cc-intro{display:grid;grid-template-columns:1fr 240px;gap:35px;padding:24px 0 30px;border-bottom:1px solid var(--cc-line);align-items:center}.cc-intro p{margin-top:16px;color:var(--cc-muted)}.cc-path{border-left:2px solid var(--cc-green);padding:18px 26px;background:var(--cc-wash);border-radius:0 14px 14px 0;display:grid;justify-items:start}.cc-path span{font-weight:650}.cc-path i{font-size:13px;color:var(--cc-muted);font-style:normal}.cc-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:23px 0 30px}.cc-metrics p{font-size:12px;color:var(--cc-muted)}.cc-metrics strong{display:block;color:var(--cc-ink);font-size:28px;font-weight:650;line-height:1.4}.cc-metrics strong small{font-size:16px}.cc-section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:13px 0}.cc-section-head>span{font-size:12px;color:var(--cc-muted)}.cc-lessons{border:1px solid var(--cc-line);border-radius:12px;background:var(--cc-paper);overflow:hidden}.cc-lesson{display:grid;grid-template-columns:40px 1fr auto;gap:17px;align-items:center;padding:23px}.cc-lesson+.cc-lesson{border-top:1px solid var(--cc-line)}.cc-number{align-self:start;font:24px/1.5 Georgia,serif;color:var(--cc-green)}.cc-lesson p{font-size:13px;color:var(--cc-muted);margin:4px 0}.cc-lesson-action{display:grid;gap:8px;justify-items:end}.cc-tag{font-size:11px;color:var(--cc-muted)}.cc-bottom-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px}.cc-panel{border:1px solid var(--cc-line);border-radius:12px;background:#fff;padding:24px}.cc-panel p{font-size:14px;color:var(--cc-muted);margin:8px 0 18px}.cc-panel .cc-kicker{margin-bottom:6px}.cc-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.cc-resume{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 22px;border-radius:10px;background:#e5f1ec;margin-bottom:25px}.cc-resume p{font-size:13px;color:var(--cc-muted)}.cc-footnote{font-size:12px;color:var(--cc-muted);margin-top:20px!important}.cc-reading-header{padding:27px 0}.cc-reading-header p{color:var(--cc-muted);margin-top:12px}.cc-section{padding:24px 0;border-bottom:1px solid var(--cc-line)}.cc-section p{white-space:pre-line;margin-top:12px}.cc-example{margin-top:28px;padding:25px;background:var(--cc-wash);border-radius:12px}.cc-root .cc-english{font-family:Georgia,"Times New Roman",serif;font-size:23px;line-height:1.65;color:#223f3b}.cc-example-options{font-size:15px;margin:16px 0!important}.cc-root details{border-top:1px solid #c6dbd1;padding-top:14px}.cc-root summary{cursor:pointer;color:var(--cc-green);font-weight:650;min-height:40px}.cc-root details p{margin:10px 0}.cc-root .cc-clue{margin-top:14px;padding:11px 14px;border-left:3px solid #a2c5b5;font-size:14px;white-space:pre-line;background:#f0f7f3}.cc-quiz-top{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--cc-muted)}.cc-root progress{width:100%;height:6px;accent-color:var(--cc-green);display:block;margin-bottom:22px}.cc-question{background:#fff;border:1px solid var(--cc-line);border-radius:12px;padding:28px}.cc-question fieldset{border:0;padding:0;margin:24px 0;display:grid;gap:10px}.cc-question legend{font-size:13px;color:var(--cc-muted);margin-bottom:12px}.cc-option{display:flex;align-items:center;gap:12px;padding:13px 17px;border:1px solid var(--cc-line);border-radius:8px;cursor:pointer;min-height:50px}.cc-option.is-selected{border-color:var(--cc-green);background:#edf6f0}.cc-option input{accent-color:var(--cc-green);width:17px;height:17px;flex-shrink:0}.cc-option-letter{font-size:12px;color:var(--cc-muted)}.cc-note-label{display:block;font-size:13px;color:var(--cc-muted)}.cc-root textarea{display:block;width:100%;resize:vertical;min-height:90px;padding:12px;border:1px solid #b5cbc1;border-radius:7px;color:var(--cc-ink);margin-top:8px;background:#fff}.cc-muted{font-size:14px;color:var(--cc-muted)}.cc-word-bank{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:18px;background:var(--cc-wash);border-radius:10px;margin:20px 0}.cc-word-bank>span{font:16px/1.7 Georgia,serif;overflow-wrap:anywhere}.cc-word-bank b{font:12px/1 system-ui;color:var(--cc-green);margin-right:5px}.cc-word-bank small{font:10px/1 system-ui;margin-left:6px}.cc-passage{font:19px/1.95 Georgia,"Times New Roman",serif;background:#fff;border:1px solid var(--cc-line);border-radius:12px;padding:26px}.cc-passage p+p{margin-top:17px}.cc-blank{color:var(--cc-green);white-space:nowrap}.cc-answer-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin-top:23px}.cc-answer-grid label{font-size:12px;color:var(--cc-muted)}.cc-root select{display:block;width:100%;min-height:44px;border:1px solid #b5cbc1;border-radius:7px;color:var(--cc-ink);background:#fff;padding:8px;margin-top:5px}.cc-result{margin-top:20px;padding:23px;border:1px solid var(--cc-line);border-radius:12px;background:#fff}.cc-result-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:14px;font-size:12px}.cc-result-head strong{color:var(--cc-green)}.cc-result.is-wrong{border-left:4px solid #b48632}.cc-result.is-wrong .cc-result-head strong{color:var(--cc-amber)}.cc-result>p{margin-top:12px;font-size:14px}.cc-result .cc-english{font-size:20px}.cc-my-note{color:var(--cc-muted);white-space:pre-line}.cc-review-action{margin:10px 0 26px;text-align:right}.cc-history{display:flex;justify-content:space-between;align-items:center;gap:15px;border-bottom:1px solid var(--cc-line);padding:20px 0}.cc-history p{font-size:12px;color:var(--cc-muted)}.cc-error{padding:17px;margin-bottom:18px;background:#fff1e8;border:1px solid #e1b397;border-radius:10px;color:#8a391e}.cc-error p{margin:7px 0 12px}
@media(max-width:650px){.cc-intro{grid-template-columns:1fr;gap:23px;padding-top:12px}.cc-path{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:15px;font-size:12px;border-left-width:3px}.cc-path i{transform:rotate(-90deg)}.cc-metrics{gap:10px}.cc-bottom-grid{grid-template-columns:1fr}.cc-lesson{grid-template-columns:27px 1fr;gap:12px;padding:18px 15px}.cc-lesson-action{grid-column:2;display:flex;justify-content:space-between;align-items:center}.cc-section-head{align-items:flex-start;flex-direction:column;gap:3px}.cc-resume{align-items:flex-start;flex-direction:column;gap:12px}.cc-question,.cc-example,.cc-result,.cc-panel,.cc-passage{padding:19px 16px}.cc-root .cc-english{font-size:21px}.cc-word-bank{grid-template-columns:repeat(2,minmax(0,1fr));padding:14px}.cc-answer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.cc-actions .cc-button{flex:1}.cc-quiz-top>span{white-space:nowrap}.cc-history{align-items:flex-start}.cc-history .cc-button{flex-shrink:0}.cc-passage{font-size:18px}}
@media(prefers-reduced-motion:reduce){.cc-root *{scroll-behavior:auto!important}}