:root{--ink:#18313a;--muted:#627781;--line:#dce6e9;--paper:#f5f8f8;--white:#fff;--red:#c4382f;--green:#126b63;--gold:#d39a36;--shadow:0 14px 40px rgba(22,52,61,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:linear-gradient(180deg,#edf5f4 0,#f7f9f8 360px,#f4f6f6 100%);line-height:1.75}.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px max(24px,calc((100vw - 1180px)/2));background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.brand{display:flex;gap:10px;align-items:center;color:var(--ink);text-decoration:none;font-weight:800}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;color:#fff;background:linear-gradient(135deg,var(--red),#e16d44);box-shadow:0 7px 20px rgba(196,56,47,.25)}nav{display:flex;gap:18px}nav a{color:var(--muted);text-decoration:none;font-size:14px}nav a:hover{color:var(--red)}.shell{max-width:1180px;margin:0 auto;padding:42px 24px 80px}.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:28px;align-items:stretch}.hero-main,.hero-side,.card,.chapter,.quiz-panel,.source-card{background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.hero-main{display:flex;flex-direction:column;padding:44px;background:linear-gradient(135deg,#fff 0,#fff 65%,#f3dddd 100%)}.eyebrow{color:var(--red);font-weight:800;letter-spacing:.08em;font-size:13px}.hero h1{font-size:clamp(34px,5vw,62px);line-height:1.1;margin:10px 0 18px;letter-spacing:-.04em}.hero p{font-size:17px;color:var(--muted);max-width:760px}.hero-side{padding:26px}.exam-stat{display:grid;grid-template-columns:1fr 1fr;gap:12px}.stat{padding:18px;border-radius:16px;background:#f3f7f7}.stat b{display:block;font-size:26px;line-height:1.1;color:var(--green)}.stat span{font-size:13px;color:var(--muted)}.notice{margin-top:16px;padding:14px 16px;border-left:4px solid var(--gold);background:#fff8e8;border-radius:10px;font-size:14px}.section-title{margin:52px 0 18px}.section-title h2{font-size:30px;margin:0}.section-title p{margin:4px 0;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.card{padding:26px}.card.legal{border-top:5px solid var(--red)}.card.finance{border-top:5px solid var(--green)}.card h3{font-size:24px;margin:0 0 8px}.card p{color:var(--muted)}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:9px 16px;border:none;border-radius:12px;background:var(--ink);color:#fff;text-decoration:none;font-weight:700;cursor:pointer}.btn.secondary{background:#eef3f4;color:var(--ink);border:1px solid var(--line)}.btn.red{background:var(--red)}.btn.green{background:var(--green)}.btn:hover{filter:brightness(.96);transform:translateY(-1px)}.pill{display:inline-block;padding:4px 10px;border-radius:999px;background:#edf3f4;color:var(--muted);font-size:12px;font-weight:700}.course-hero{padding:34px;border-radius:24px;color:#fff;box-shadow:var(--shadow);margin-bottom:24px}.course-hero.legal{background:linear-gradient(135deg,#9d241f,#d4573f)}.course-hero.finance{background:linear-gradient(135deg,#084f4a,#16877d)}.course-hero h1{font-size:38px;margin:6px 0 10px}.course-hero p{max-width:850px;color:rgba(255,255,255,.88)}.progress-wrap{display:flex;align-items:center;gap:12px;margin-top:20px}.progress{flex:1;height:10px;border-radius:99px;background:rgba(255,255,255,.22);overflow:hidden}.progress i{display:block;height:100%;background:#fff;width:0;transition:.3s}.chapter{padding:26px;margin:16px 0}.chapter-head{display:flex;gap:15px;align-items:flex-start;justify-content:space-between}.chapter h2{font-size:25px;margin:0}.chapter .plain{font-size:17px;background:#f3f7f7;border-radius:14px;padding:14px 16px}.columns{display:grid;grid-template-columns:1fr 1fr;gap:20px}.list{margin:8px 0;padding-left:20px}.trap{padding:12px 14px;background:#fff3ed;border-left:4px solid #e16d44;border-radius:10px;margin:8px 0}.mnemonic{padding:14px 16px;background:#ecf7f5;color:#0e655d;font-weight:800;border-radius:12px}.done{display:flex;gap:8px;align-items:center;font-size:14px;color:var(--muted);white-space:nowrap}.done input{width:18px;height:18px}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:18px;position:sticky;top:74px;z-index:10;box-shadow:0 8px 24px rgba(24,49,58,.08)}select,input[type=search]{min-height:42px;border:1px solid #cbd8dc;border-radius:10px;padding:8px 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rgba(24,49,58,.08)}.timer{font-size:23px;font-weight:900;color:var(--red)}.result{padding:28px;border-radius:20px;background:#fff;border:1px solid var(--line);margin:18px 0}.score{font-size:54px;font-weight:900;line-height:1;color:var(--green)}.sources{display:grid;gap:12px}.source-card{padding:18px}.source-card a{color:var(--green);font-weight:800}.source-card p{margin:4px 0;color:var(--muted);font-size:14px}.legal-note{padding:18px;border-radius:14px;background:#fff8e8;border:1px solid #efd6a4}.footer-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}footer{text-align:center;padding:24px;color:var(--muted);font-size:13px;border-top:1px solid var(--line);background:#fff}.hidden{display:none!important}@media(max-width:820px){nav{display:none}.hero,.grid,.columns{grid-template-columns:1fr}.hero-main{padding:30px}.shell{padding:28px 14px 60px}.course-hero h1{font-size:30px}.chapter-head{display:block}.done{margin-top:12px}.toolbar{top:62px}.mock-head{top:62px}.exam-stat{grid-template-columns:1fr 1fr}}@media print{.topbar,footer,.toolbar,.actions,.done,.btn{display:none!important}body{background:#fff}.shell{max-width:none;padding:0}.chapter,.question,.card{box-shadow:none;break-inside:avoid}.course-hero{color:#000;background:#fff;border:1px solid #aaa}}

/* three-entry information architecture */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.entry-card{position:relative;display:flex;flex-direction:column;padding:28px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.entry-card>.btn{align-self:flex-start;margin-top:auto}.entry-no{position:absolute;right:20px;top:16px;color:#cbd8dc;font-weight:900;font-size:32px}.entry-icon{display:grid;place-items:center;width:54px;height:54px;border-radius:16px;color:#fff;background:linear-gradient(135deg,var(--red),var(--green));font-size:24px;font-weight:900}.entry-card h3{font-size:28px;margin:15px 0 0}.entry-card h4{margin:2px 0 8px}.entry-card p{color:var(--muted)}.category-hero{padding:42px;border-radius:24px;background:linear-gradient(135deg,#18313a,#126b63);color:#fff;box-shadow:var(--shadow)}.category-hero h1{font-size:46px;margin:6px 0}.category-hero p{max-width:780px;color:rgba(255,255,255,.86)}.knowledge-guide{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 26px;margin-bottom:20px;background:#fff;border:1px solid var(--line);border-radius:18px}.knowledge-guide p{margin:3px 0;color:var(--muted)}.knowledge-list{padding-left:24px}.knowledge-list li{margin:8px 0}.fact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.fact-card{padding:16px;border:1px solid var(--line);border-radius:14px;background:#f7f9f9}.fact-card b{color:var(--green)}.fact-card p{margin:5px 0 0;color:var(--muted)}
@media(max-width:820px){.entry-grid,.fact-grid{grid-template-columns:1fr}.knowledge-guide{display:block}.category-hero{padding:30px}}
/* exam countdown */
.exam-countdown{display:flex;align-items:baseline;gap:10px;margin-top:auto;padding:18px 20px;border:1px solid #ead8d2;border-radius:16px;background:rgba(255,255,255,.78);box-shadow:0 8px 24px rgba(24,49,58,.06)}.exam-countdown span{color:var(--muted);font-weight:700}.exam-countdown strong{font-size:44px;line-height:1;color:var(--red)}.exam-countdown em{color:var(--ink);font-size:18px;font-style:normal;font-weight:800}@media(max-width:820px){.exam-countdown{margin-top:28px;flex-wrap:wrap}.exam-countdown strong{font-size:38px}}

/* detailed plain-language course */
.section-title.compact{margin:0 0 16px}.course-method{margin:0 0 28px;padding:26px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.method-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.method-grid div{padding:16px;border-radius:14px;background:#f3f7f7}.method-grid b{display:block;color:var(--green);font-size:16px}.method-grid span{display:block;margin-top:5px;color:var(--muted);font-size:14px}.study-tip{margin-top:16px;padding:14px 16px;border-left:4px solid var(--gold);border-radius:10px;background:#fff8e8}.detailed-chapter{padding:32px;margin:24px 0}.chapter-intro{margin-top:22px}.chapter-intro h3,.chapter-overview h3{margin-bottom:8px}.chapter-overview{margin-top:18px}.memory-banner{display:flex;align-items:center;gap:16px;margin:22px 0;padding:18px 20px;border-radius:16px;background:linear-gradient(135deg,#0e665f,#17887e);color:#fff}.memory-banner span{flex:0 0 auto;font-size:13px;opacity:.85}.memory-banner strong{font-size:18px}.deep-explain{margin-top:28px;padding-top:24px;border-top:1px solid var(--line)}.deep-head h3{margin:8px 0 2px;font-size:24px}.deep-head p{margin:0 0 16px;color:var(--muted)}.explain-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.explain-card{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:#fbfcfc}.explain-card-head{display:flex;align-items:center;gap:12px;padding:16px 18px;background:#edf4f3}.explain-card-head span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--ink);color:#fff;font-weight:900}.explain-card-head h4{margin:0;font-size:18px}.explain-block{padding:14px 18px;border-top:1px solid #e6edef}.explain-block b{display:block;margin-bottom:5px;font-size:14px}.explain-block p{margin:0;color:#334d56}.explain-block.simple b{color:var(--green)}.explain-block.reason{background:#f6faf9}.explain-block.reason b{color:#1d6b63}.explain-block.wrong{background:#fff5f2}.explain-block.wrong b{color:var(--red)}
@media(max-width:820px){.method-grid,.explain-grid{grid-template-columns:1fr}.detailed-chapter{padding:22px 18px}.memory-banner{display:block}.memory-banner strong{display:block;margin-top:8px}.course-method{padding:20px}.course-hero h1{font-size:28px;letter-spacing:-.03em}.explain-card-head h4{font-size:17px}}