:root{--ink:#193c47;--muted:#526972;--brand:#125d61;--paper:#f5f5ef;--card:#fff;--line:#d7e1df;--orange:#ae471f;--green:#216e46;--radius:18px;--shadow:0 8px 30px #173f4210;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;line-height:1.65}button,input{font:inherit}button,a,label{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #cc682e;outline-offset:4px}button:disabled{cursor:default;opacity:.48}[hidden]{display:none!important}.skip-link{position:absolute;top:-80px;left:16px;z-index:100;background:white;padding:12px}.skip-link:focus{top:10px}
.site-header{max-width:1180px;margin:auto;min-height:84px;padding:18px 28px;display:flex;align-items:center;gap:22px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:21px;font-weight:800;letter-spacing:.03em}.brand-small{font-size:14px;font-weight:500;margin-left:9px;color:var(--muted)}.header-note{font-size:13px;color:var(--muted);margin-left:auto}.button{border:1px solid transparent;border-radius:10px;padding:10px 17px;font-weight:650;min-height:44px;line-height:1.4}.primary{background:var(--brand);color:white}.primary:hover{background:#0c484b}.secondary{background:#eef4f1;color:var(--ink);border-color:var(--line)}.secondary:hover{background:#e2eee7}.text-button{background:transparent;color:var(--brand);padding:8px}
main{max-width:1124px;margin:0 auto;padding:44px 24px 50px;min-height:65vh}main:focus{outline:none}.eyebrow{font-weight:700;font-size:12px;letter-spacing:.15em;text-transform:uppercase;color:var(--brand);margin-bottom:9px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,4vw,42px);line-height:1.3;letter-spacing:-.02em;margin-bottom:16px}h2{font-size:24px;line-height:1.4}h3{font-size:18px;margin-bottom:8px}.intro{max-width:700px;color:var(--muted);margin-bottom:20px}.hero{display:flex;align-items:flex-start;gap:30px;margin-bottom:32px}.hero-copy{flex:1}.hero-count{min-width:155px;background:#e4efdf;border:1px solid #d2e2cf;border-radius:var(--radius);padding:20px 26px;text-align:center;color:#265235}.hero-count strong{font-size:42px;line-height:1.25;display:block}.hero-count span{font-size:13px}.rule-strip{display:flex;gap:15px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.rule-strip span{padding-left:12px;border-left:2px solid #72a391}.resume{background:#fff8e9;border:1px solid #e4d5b6;border-radius:14px;padding:17px 20px;margin:24px 0;display:flex;align-items:center;justify-content:space-between;gap:14px}.resume p{margin:0}.bank-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.bank-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;position:relative;overflow:hidden}.bank-card:before{content:"";position:absolute;left:0;top:0;height:5px;width:100%;background:var(--card-accent,#7ca89b)}.bank-number{color:var(--muted);font-size:12px;font-weight:750;letter-spacing:.1em;margin-bottom:19px}.bank-card h2{font-size:21px;margin-bottom:10px}.bank-card p{font-size:14px;color:var(--muted);margin-bottom:22px;flex:1}.bank-meta{display:flex;gap:12px;font-size:13px;color:var(--muted);margin-bottom:20px}.bank-meta strong{color:var(--ink)}.bank-card .button{width:100%}.section-note{font-size:13px;color:var(--muted);margin:24px 0 0}.crumb{font-size:13px;color:var(--muted);margin-bottom:20px}.mode-panel{max-width:820px;margin:auto}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:30px}.mode-card{background:white;border:1px solid var(--line);padding:28px;border-radius:var(--radius);box-shadow:var(--shadow)}.mode-card p{color:var(--muted);font-size:14px;min-height:75px}.mode-number{font-size:38px;font-weight:750;color:var(--brand);line-height:1.3;margin-bottom:16px}.mode-number small{font-size:14px;font-weight:500;margin-left:5px}.mode-card .button{width:100%}.back-button{margin-bottom:20px}.pill{display:inline-flex;font-size:12px;padding:3px 9px;background:#e6eeeb;border-radius:20px;color:#315e52;vertical-align:middle;margin-left:8px}
.exam-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:15px;margin-bottom:18px}.exam-heading h1{font-size:27px;margin-bottom:4px}.exam-subtitle{font-size:13px;color:var(--muted);margin:0}.progress-label{font-size:14px;white-space:nowrap;color:var(--muted)}.progress-track{height:6px;background:#dbe7e0;border-radius:10px;overflow:hidden;margin-bottom:25px}.progress-fill{height:100%;background:var(--brand);transition:width .2s}.exam-grid{display:grid;grid-template-columns:minmax(0,1fr) 218px;gap:24px;align-items:start}.question-card{border:1px solid var(--line);border-radius:var(--radius);background:white;padding:30px;box-shadow:var(--shadow)}.question-label{font-size:13px;color:var(--muted);margin-bottom:16px}.question-prompt{font-size:21px;line-height:1.65;font-weight:650;white-space:pre-wrap;overflow-wrap:anywhere;margin-bottom:24px}.question-options{border:0;padding:0;margin:0;min-width:0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.option{display:flex;gap:13px;align-items:flex-start;padding:14px 16px;margin-bottom:12px;border:1px solid #d1dddb;border-radius:12px;cursor:pointer;min-height:53px;overflow-wrap:anywhere}.option:hover{background:#f3f7f4}.option.selected{background:#eaf4ee;border-color:var(--brand);box-shadow:0 0 0 1px var(--brand)}.option input{accent-color:var(--brand);flex-shrink:0;margin-top:7px;width:17px;height:17px}.option-letter{color:var(--muted);font-weight:750;font-size:15px;line-height:26px}.option-copy{line-height:26px;flex:1;font-size:16px;white-space:pre-wrap}.exam-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:28px;flex-wrap:wrap}.save-status{font-size:12px;color:var(--muted);text-align:center;margin:14px 0 0}.navigator{background:#eaf0e8;border:1px solid #d2ddd2;border-radius:var(--radius);padding:19px;position:sticky;top:20px}.navigator h2{font-size:15px;margin-bottom:6px}.navigator p{font-size:12px;color:var(--muted);margin-bottom:15px}.question-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.nav-button{background:white;border:1px solid #bdcfc4;border-radius:7px;height:32px;color:var(--ink);font-size:12px;padding:0}.nav-button.answered{background:#cee3d6;border-color:#739c80}.nav-button.current{outline:2px solid var(--brand);outline-offset:1px;font-weight:800}.nav-legend{display:flex;gap:12px;font-size:11px;color:var(--muted);margin-top:17px}.legend-box{display:inline-block;width:9px;height:9px;margin-right:4px;border:1px solid #8baba0;background:white}.legend-box.filled{background:#cee3d6}.nav-submit{width:100%;margin-top:20px}.question-table{overflow-x:auto;margin-bottom:20px}.question-table table{border-collapse:collapse;width:100%;font-size:15px;background:#f7faf8}.question-table th,.question-table td{border:1px solid var(--line);padding:9px 14px;text-align:center}.graph{width:100%;max-width:540px;display:block;margin:5px auto 22px;height:auto}.graph text{fill:var(--ink);font-family:"Microsoft YaHei",sans-serif;font-size:12px}
.result-top{background:var(--ink);color:white;border-radius:22px;padding:32px;display:flex;align-items:center;justify-content:space-between;gap:22px;margin-bottom:25px}.result-top h1{font-size:27px;margin-bottom:8px}.result-top p{margin:0;color:#d3e5e3;font-size:14px}.result-score{text-align:right;min-width:175px}.result-score strong{font-size:54px;line-height:1.15;display:block;white-space:nowrap}.result-score span{font-size:13px;color:#d3e5e3}.result-status{display:inline-block;margin-top:17px;border-radius:25px;padding:5px 13px;font-size:15px;background:#d8f4e4;color:#205537;font-weight:750}.result-status.failed{background:#ffdfc9;color:#7e3219}.result-status.complete{background:#dfeef4;color:#234559}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-bottom:25px}.stat{background:white;border:1px solid var(--line);border-radius:13px;padding:17px 22px;font-size:13px;color:var(--muted)}.stat strong{display:block;font-size:28px;color:var(--ink)}.result-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}.review-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:17px}.review-heading h2{margin:0;font-size:22px}.review-heading label{font-size:14px;white-space:nowrap}.review-heading input{accent-color:var(--brand);margin-right:6px}.review-list{display:grid;gap:14px}.review-item{background:white;border:1px solid var(--line);border-left:4px solid #7da891;border-radius:13px;padding:20px}.review-item.incorrect{border-left-color:#b65a30}.review-title{font-size:16px;font-weight:650;margin-bottom:12px;white-space:pre-wrap;overflow-wrap:anywhere}.review-status{font-size:11px;font-weight:600;color:var(--green);margin-right:8px;white-space:nowrap}.review-status.incorrect{color:#984724}.review-answer{font-size:14px;line-height:1.8;color:var(--muted);margin:2px 0;overflow-wrap:anywhere}.review-answer strong{color:var(--ink)}.review-explanation{margin:12px 0 0;padding-top:10px;border-top:1px dashed var(--line);font-size:14px;overflow-wrap:anywhere}.review-point{color:var(--muted);font-size:12px;margin-top:8px}.empty-state{background:white;border:1px solid var(--line);border-radius:14px;padding:25px;text-align:center}.site-footer{max-width:1124px;margin:auto;padding:22px 24px 30px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}dialog{max-width:480px;width:calc(100% - 36px);border:0;border-radius:18px;box-shadow:0 30px 100px #102c4950;padding:28px;color:var(--ink)}dialog::backdrop{background:#13323870}dialog h2{font-size:22px;margin-bottom:14px}dialog p{font-size:15px;color:var(--muted)}.dialog-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:24px}.loading,.noscript{text-align:center;padding:50px 20px;color:var(--muted)}
@media(max-width:900px){.bank-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.exam-grid{grid-template-columns:minmax(0,1fr) 190px}.question-card{padding:25px}.site-header{padding:16px 24px}}
@media(max-width:660px){.site-header{min-height:72px;padding:14px 16px;gap:8px}.brand{font-size:18px;gap:8px}.brand-small{font-size:12px;margin-left:5px}.brand img{width:29px;height:29px}.header-note{display:none}.site-header #home-button{margin-left:auto;font-size:12px}main{padding:28px 16px 35px}.hero{gap:15px;margin-bottom:26px}.hero-count{min-width:98px;padding:15px 12px}.hero-count strong{font-size:32px}.hero-count span{font-size:11px}.hero h1{font-size:28px}.intro{font-size:14px}.rule-strip{gap:8px;font-size:12px}.bank-grid{grid-template-columns:1fr;gap:15px}.bank-card{padding:22px}.bank-number{margin-bottom:14px}.bank-card p{margin-bottom:15px}.mode-grid{grid-template-columns:1fr;gap:16px}.mode-card{padding:23px}.mode-card p{min-height:0}.mode-number{font-size:32px}.exam-heading{align-items:flex-start;flex-direction:column;gap:5px}.exam-heading h1{font-size:22px}.progress-label{font-size:12px}.exam-grid{grid-template-columns:1fr;gap:20px}.question-card{padding:21px 17px}.question-prompt{font-size:19px}.option{padding:12px 11px;gap:10px}.option-copy{font-size:15px}.option input{width:16px;height:16px}.navigator{position:static;padding:18px}.question-nav{grid-template-columns:repeat(8,1fr)}.nav-button{height:34px}.exam-actions .button{padding:10px 12px;font-size:14px}.result-top{padding:24px;flex-direction:column;align-items:flex-start;gap:17px}.result-top h1{font-size:24px}.result-score{text-align:left;min-width:0}.result-score strong{font-size:46px}.stats{gap:9px}.stat{padding:13px 12px}.stat strong{font-size:24px}.result-actions .button{font-size:14px;flex:1}.review-heading{gap:8px}.review-heading h2{font-size:20px}.review-heading label{font-size:12px}.review-item{padding:17px}.resume{align-items:flex-start;flex-direction:column}.site-footer{padding:18px 16px;font-size:11px}.graph text{font-size:13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.hero-copy{min-width:0}.hero-count{flex:0 0 230px}.hero-count span,.hero-count small{display:block}.hero-count small{font-size:12px;color:var(--muted);margin-top:6px}.hero-description{font-size:15px;color:var(--muted);max-width:720px}.section-heading{margin:20px 0}.mode-card p.pill{min-height:0;margin:0 0 22px;padding:7px 11px}.graph-axis{stroke:#47656e;stroke-width:1.5}.graph-line{stroke:var(--brand);stroke-width:2.5;fill:none}.graph-point{fill:var(--brand)}.result-top{display:block}.result-score{font-size:54px;line-height:1.3;font-weight:800;text-align:left;margin:18px 0 8px}.result-top .result-status{margin:4px 0 12px;color:#205537}.result-top .result-status.fail{background:#ffdfc9;color:#7e3219}.result-top .result-status.complete{color:#234559}.stats{grid-template-columns:repeat(4,minmax(0,1fr));margin:24px 0}.stat span{display:block}.result-actions{margin:24px 0 0}.result-actions .text-button{color:#e3f3f0}.review-title{display:flex;align-items:flex-start;gap:12px;justify-content:space-between}.review-title h3{font-size:17px;line-height:1.6;margin:0}.review-status{flex-shrink:0;margin:4px 0 0}.review-item.incorrect .review-status{color:#984724}
@media(max-width:660px){.hero{flex-direction:column;gap:18px}.hero-count{flex:none;width:100%;padding:14px 20px}.hero-count strong{font-size:34px}.hero-count span{font-size:13px}.hero h1{font-size:30px}.hero-description{font-size:14px}.result-score{font-size:46px}.stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.result-top{padding:24px 19px}.result-actions .text-button{flex-basis:100%}.review-heading .button{font-size:12px;white-space:nowrap}.graph text{font-size:26px}}
.bank-group-heading{margin:28px 0 14px;font-size:18px;color:var(--brand)}
.bank-card h4{font-size:18px;line-height:1.5;margin:0 0 8px}
.mode-feedback-note{padding:14px 17px;background:#e8f0e9;border-radius:12px;color:var(--ink)!important;font-size:14px}
.option.locked{cursor:default}.option.locked:hover{background:inherit}
.option.correct-answer{border-color:#347b50;background:#edf7ef;box-shadow:0 0 0 1px #347b50}
.option.wrong-answer{border-color:#ac542d;background:#fff4ed;box-shadow:0 0 0 1px #ac542d}
.answer-feedback:not(:empty){border:1px solid #abcbb3;border-left:4px solid #347b50;border-radius:12px;padding:18px 20px;margin-top:22px;background:#f0f8f1;overflow-wrap:anywhere}
.answer-feedback.incorrect{border-color:#e0bea9;border-left-color:#ac542d;background:#fff7f0}
.feedback-status{font-size:19px;margin:0 0 9px;color:#245934}.incorrect .feedback-status{color:#893d1b}
.answer-feedback p{font-size:15px;line-height:1.8;margin:6px 0;white-space:pre-wrap}
.feedback-correct-answer{font-weight:700}.feedback-explanation{padding-top:11px;border-top:1px dashed #b6c9bc;margin-top:13px!important}
.answer-feedback .feedback-note{font-size:12px;color:var(--muted);margin-top:12px}.result-top .result-policy{margin-top:8px;font-size:13px}
@media(max-width:660px){.answer-feedback:not(:empty){padding:16px 14px}.answer-feedback p{font-size:14px}.answer-feedback .feedback-note{font-size:12px}.bank-group-heading{font-size:17px}}