/* ===== ReadDeck 真题精读闪卡 · 设计体系（复刻用户原版） ===== */
:root{--nav:#152d29;--nav2:#1d3a34;--ink:#22312e;--muted:#71807c;--paper:#fffdfa;--bg:#eef2ef;--line:#e2e8e3;--green:#2f745f;--green-pale:#e5f0ea;--purple:#7357a8;--purple-pale:#f0ebf8;--amber:#9a6828;--amber-pale:#f7eddb}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Microsoft YaHei",system-ui,sans-serif}
.side{position:fixed;inset:0 auto 0 0;width:280px;padding:30px 20px;background:linear-gradient(180deg,var(--nav),#10231f);color:#fff;overflow:auto}
.brand{padding:0 10px 25px;border-bottom:1px solid rgba(255,255,255,.12)}
.brand small{display:block;color:#9fc2b6;font-size:12px;letter-spacing:.14em}
.brand h1{margin:8px 0 6px;font-size:21px}
.brand p{margin:0;color:#aebeba;font-size:12px;line-height:1.6}
.year{margin:24px 10px 10px;color:#9fc2b6;font-size:12px;font-weight:700}
.navitem{width:100%;margin:5px 0;padding:13px 14px;border:0;border-radius:12px;background:transparent;color:#dce7e3;text-align:left;cursor:pointer;font:inherit}
.navitem:hover,.navitem.on{background:rgba(255,255,255,.1);color:#fff}
.navitem.on{box-shadow:inset 3px 0 #75b69f}
.navitem b{display:block;font-size:15px}
.navitem span{display:block;margin-top:4px;color:#a7bbb4;font-size:11px}
.main{min-height:100vh;margin-left:280px}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;padding:14px 28px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.92);backdrop-filter:blur(12px)}
.crumb{font-size:14px;font-weight:700}
.spacer{flex:1}
.topbtn,.tab,.action{padding:9px 12px;border:1px solid #cfdad4;border-radius:10px;background:#fff;color:var(--green);cursor:pointer;font:inherit;font-size:13px}
.topbtn:hover,.tab.on,.action.primary{border-color:var(--green);background:var(--green);color:#fff}
.action:disabled{opacity:.45;cursor:not-allowed;border-color:#cfdad4;background:#fff;color:var(--muted)}
.menu{display:none}
.content{width:min(1060px,calc(100% - 48px));margin:0 auto;padding:40px 0 80px}
.hero{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}
.eyebrow{margin:0 0 8px;color:var(--green);font-size:12px;font-weight:800;letter-spacing:.12em}
.hero h2{margin:0;font-family:Georgia,"Microsoft YaHei",serif;font-size:34px;line-height:1.25}
.hero p{max-width:650px;margin:10px 0 0;color:var(--muted);line-height:1.7}
.metrics{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.metric{padding:9px 11px;border:1px solid var(--line);border-radius:999px;background:#fff;color:#55645f;font-size:12px;white-space:nowrap}
.tabs{position:sticky;top:62px;z-index:15;display:flex;gap:8px;margin-bottom:18px;padding:8px;border:1px solid var(--line);border-radius:14px;background:rgba(238,242,239,.94);backdrop-filter:blur(10px)}
.tab{flex:1}
.paper{overflow:hidden;margin-bottom:16px;border:1px solid var(--line);border-radius:18px;background:var(--paper);box-shadow:0 8px 24px rgba(30,58,49,.05)}
.paperhead{display:flex;align-items:center;gap:10px;padding:15px 20px;border-bottom:1px solid var(--line);background:#f8faf8}
.pnum{display:grid;width:28px;height:28px;place-items:center;border-radius:8px;background:var(--green-pale);color:var(--green);font-size:12px;font-weight:800}
.paperhead b{font-size:14px}
.sentence{position:relative;padding:19px 22px;border-bottom:1px solid #edf0ed}
.sentence:last-child{border-bottom:0}
.speakbtn{position:absolute;top:12px;right:14px;padding:6px 10px;border:1px solid #cfdad4;border-radius:8px;background:#fff;color:var(--green);cursor:pointer;font:inherit;font-size:12px;opacity:0;transition:.15s}
.sentence:hover .speakbtn,.speakbtn:focus{opacity:1}
.en{font-family:Georgia,"Times New Roman",serif;font-size:17px;line-height:1.78}
.en .speakbtn{font-family:Inter,"Microsoft YaHei",system-ui,sans-serif}
.cn{margin-top:8px;color:#62716c;font-size:14px;line-height:1.75}
.kw{padding:1px 2px;border-bottom:2px solid #7fb49f;color:#235e4d;cursor:pointer}
.kw:hover{background:var(--green-pale)}
.plainword{margin:0;padding:1px 0;border:0;border-radius:4px;background:transparent;color:inherit;cursor:pointer;font:inherit;line-height:inherit}
.plainword:hover,.plainword:focus{outline:0;background:#e9efeb;box-shadow:0 0 0 2px #e9efeb}
.longtag{display:inline-flex;margin:0 7px 3px 0;padding:3px 7px;border:0;border-radius:6px;background:var(--purple-pale);color:var(--purple);cursor:pointer;font-size:11px;font-weight:800;vertical-align:middle}
.quiz .cn{display:none}
.quiz .sentence.open .cn{display:block}
.quiz .sentence{cursor:pointer}
.section-note{margin:0 0 14px;padding:12px 15px;border-radius:12px;background:#e5eee9;color:#446158;font-size:13px;line-height:1.6}
.wordgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.wordcard{position:relative;min-height:178px;padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff;cursor:pointer;transition:.18s}
.wordcard:hover{transform:translateY(-2px);border-color:#9fc5b5;box-shadow:0 9px 24px rgba(39,83,67,.08)}
.wordtop{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.wordterm{font-family:Georgia,serif;font-size:21px;font-weight:700}
.badge{padding:4px 7px;border-radius:7px;background:var(--amber-pale);color:var(--amber);font-size:10px;white-space:nowrap}
.badge.green{background:var(--green-pale);color:var(--green)}
.badge.purple{background:var(--purple-pale);color:var(--purple)}
.badge.gray{background:#eef0ef;color:#7c8884}
.ipa{margin-top:5px;color:#87938f;font-family:Georgia,serif;font-size:13px}
.meaning{margin-top:16px;line-height:1.6}
.meta{margin-top:12px;color:#87938f;font-size:11px}
.longlist{display:grid;gap:16px}
.longcard{padding:22px;border:1px solid #dfd7ee;border-radius:18px;background:#fff}
.longhead{display:flex;justify-content:space-between;gap:12px}
.longhead b{color:var(--purple);font-size:13px}
.quote{margin:14px 0;padding:15px;border-radius:12px;background:var(--purple-pale);font-family:Georgia,serif;font-size:17px;line-height:1.7}
.analysisgrid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.analysisbox{padding:14px;border:1px solid var(--line);border-radius:12px}
.analysisbox h4{margin:0 0 8px;color:#66736f;font-size:12px}
.analysisbox p{margin:0;white-space:pre-line;line-height:1.7;font-size:13px}
.analysisbox.full{grid-column:1/-1}
.analysisbox.final{border-color:#d8cdec;background:#faf8fd}
.empty{padding:50px;text-align:center;color:var(--muted)}
.mask{position:fixed;inset:0;z-index:100;display:none;place-items:center;padding:20px;background:rgba(7,22,18,.58)}
.mask.show{display:grid}
.flash{position:relative;width:min(560px,100%);max-height:min(720px,90vh);overflow:auto;padding:30px;border-radius:22px;background:#fff;box-shadow:0 22px 60px rgba(0,0,0,.25)}
.close{position:absolute;right:16px;top:12px;border:0;background:transparent;color:#73807c;font-size:28px;cursor:pointer}
.flash h3{margin:0 38px 4px 0;font-family:Georgia,serif;font-size:30px}
.flash .meaning{font-size:17px}
.source{margin-top:18px;padding:14px;border-radius:12px;background:#f1f5f2}
.source p{margin:5px 0 0;font-family:Georgia,serif;font-size:14px;line-height:1.65}
.source p.zh{font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;font-size:13px;color:#64736e}
.flashactions{display:flex;gap:8px;margin-top:18px}
.flashactions button{flex:1}
.mobile-close{display:none}
/* ===== 真题练习（题目区） ===== */
.qlist{display:grid}
.qitem{padding:20px 22px;border-bottom:1px solid #edf0ed}
.qitem:last-child{border-bottom:0}
.qstem{font-size:15px;line-height:1.75}
.qstem b{color:var(--green);margin-right:6px}
.qopts{display:grid;gap:8px;margin-top:12px}
.qopt{padding:10px 14px;border:1px solid #cfdad4;border-radius:10px;background:#fff;cursor:pointer;font-size:14px;line-height:1.65;text-align:left;color:var(--ink)}
.qopt:hover{border-color:var(--green);background:#f6faf8}
.qopt.right{border-color:var(--green);background:var(--green-pale);color:#1f5a48}
.qopt.wrong{border-color:#c05b4a;background:#fbece9;color:#a33b2b}
.qexp{margin-top:12px;padding:12px 14px;border-radius:10px;background:#f1f5f2;font-size:13px;line-height:1.75;color:#446158;white-space:pre-line}
.qexp b{color:var(--green)}
.qans{margin-top:12px}
/* ===== 响应式 ===== */
@media(max-width:900px){.wordgrid{grid-template-columns:repeat(2,minmax(0,1fr))}.analysisgrid{grid-template-columns:1fr}.analysisbox.full{grid-column:auto}.hero{align-items:flex-start;flex-direction:column}.metrics{justify-content:flex-start}}
@media(max-width:720px){.side{z-index:60;transform:translateX(-100%);transition:.22s}.side.open{transform:none}.main{margin-left:0}.menu{display:block}.content{width:min(100% - 28px,1060px);padding-top:24px}.topbar{padding:11px 14px}.topbar .desktop{display:none}.tabs{top:53px}.hero h2{font-size:27px}.wordgrid{grid-template-columns:1fr}.sentence{padding:17px}.analysisbox{padding:12px}.mobile-close{display:block;position:absolute;right:16px;bottom:18px;color:#a8bbb4;font-size:11px}.speakbtn{opacity:1}}