/* 心律失常学习报告 v1.0 */
:root{
  --ink:#172033; --muted:#64748b; --paper:#f6f8fc; --white:#fff; --line:#dbe3f0;
  --blue:#2156a5; --blue-2:#2f79c8; --cyan:#e8f4ff; --teal:#117b80; --teal-bg:#e9f7f6;
  --amber:#ad6b00; --amber-bg:#fff7e7; --red:#b52e3b; --red-bg:#fff0f1; --purple:#6252ae; --purple-bg:#f1eeff;
  --shadow:0 10px 30px rgba(27, 50, 88, .08); --radius:16px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif}
a{color:var(--blue);text-decoration:none} a:hover{text-decoration:underline}.topbar{height:62px;position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px}.brand{font-weight:800;letter-spacing:.01em;color:#173b76}.brand small{font-size:12px;color:var(--muted);font-weight:600;margin-left:8px}.topmeta{font-size:13px;color:var(--muted)}.layout{display:grid;grid-template-columns:290px minmax(0,1fr);max-width:1480px;margin:0 auto;gap:26px;padding:26px}.sidebar{position:sticky;top:86px;align-self:start;max-height:calc(100vh - 102px);overflow:auto;padding-right:6px}.side-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:0 4px 18px rgba(21,42,76,.04);margin-bottom:14px}.side-title{text-transform:uppercase;font-size:11px;letter-spacing:.12em;color:var(--muted);font-weight:800;margin:2px 4px 9px}.page-nav a{display:block;padding:8px 9px;border-radius:8px;font-size:13px;line-height:1.35;margin:2px 0}.page-nav a.current{background:#e9f2ff;color:#123f83;font-weight:800}.page-nav a:hover{background:#f0f5fc;text-decoration:none}.toc-list{max-height:43vh;overflow:auto;padding-right:4px}.toc-list ul{list-style:none;margin:0;padding:0}.toc-list li{margin:1px 0}.toc-list li.level-3 a{padding-left:18px;font-size:12px}.toc-list a{font-size:13px;display:block;padding:6px 7px;border-radius:7px;color:#40526e;line-height:1.35}.toc-list a.active{background:#eaf4ff;color:#134885;font-weight:800;border-left:3px solid var(--blue);padding-left:4px}.toc-list a:hover{text-decoration:none;background:#f1f5fb}main{min-width:0;max-width:1030px}.hero{background:linear-gradient(135deg,#133f83 0%,#2f78c8 58%,#63a5e3 100%);border-radius:20px;color:#fff;padding:42px 44px;box-shadow:var(--shadow);position:relative;overflow:hidden;margin-bottom:24px}.hero:after{content:"";position:absolute;right:-85px;top:-120px;width:360px;height:360px;border:48px solid rgba(255,255,255,.12);border-radius:50%}.hero .kicker{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:#d6e8ff;font-weight:800}.hero h1{font-size:34px;line-height:1.22;margin:9px 0 10px;letter-spacing:.01em}.hero p{margin:0;max-width:730px;color:#e8f3ff}.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:19px}.tag{font-size:12px;font-weight:750;padding:4px 9px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.26)}.breadcrumb{font-size:13px;margin:0 0 13px;color:var(--muted)}.section{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 31px;margin:0 0 19px;box-shadow:0 6px 22px rgba(20,40,76,.045)}.section h2{font-size:24px;line-height:1.3;margin:0 0 16px;color:#143b75;scroll-margin-top:82px}.section h3{font-size:18px;line-height:1.4;margin:25px 0 11px;color:#1b4e91;scroll-margin-top:82px}.section h4{font-size:16px;margin:18px 0 8px;color:#244365}.section p{margin:8px 0 13px}.lead{font-size:17px;line-height:1.85;color:#2c3d55}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.card{border:1px solid var(--line);border-radius:13px;padding:15px 16px;background:#fff}.card h3,.card h4{margin-top:0}.card p:last-child{margin-bottom:0}.note{border-left:4px solid var(--blue);background:var(--cyan);padding:13px 15px;border-radius:0 10px 10px 0;margin:16px 0}.note strong{color:#134782}.memory{border-left-color:var(--teal);background:var(--teal-bg)}.warning{border-left-color:#c47b00;background:var(--amber-bg)}.danger{border-left-color:var(--red);background:var(--red-bg)}.lecture{border-left-color:var(--purple);background:var(--purple-bg)}.label{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:5px;color:#24518d}.table-wrap{overflow:auto;margin:14px 0}.table-wrap table{width:100%;border-collapse:collapse;font-size:14px}.table-wrap th{background:#edf4ff;color:#19437c;text-align:left;font-weight:800}.table-wrap th,.table-wrap td{border:1px solid var(--line);padding:10px 11px;vertical-align:top}.table-wrap tr:nth-child(even) td{background:#fbfcfe}.flow{display:flex;flex-wrap:wrap;align-items:stretch;gap:8px;margin:14px 0}.flow span{background:#f1f6fd;border:1px solid #d4e2f3;border-radius:10px;padding:8px 11px;font-size:13px;font-weight:700;color:#244979}.flow b{align-self:center;color:#6b88b4}.checklist{margin:10px 0;padding:0;list-style:none}.checklist li{position:relative;padding-left:25px;margin:7px 0}.checklist li:before{content:"✓";position:absolute;left:0;top:1px;color:#0b8875;font-weight:900}.columns{columns:2;column-gap:34px}.columns p,.columns li{break-inside:avoid}.evidence{border:1px dashed #afc4e1;background:#f9fbff;padding:12px;border-radius:11px;margin:16px 0}.evidence summary{cursor:pointer;font-weight:800;color:#205294}.evidence figure{margin:14px 0 3px}.evidence img{width:100%;max-width:760px;border:1px solid var(--line);border-radius:9px;box-shadow:0 7px 18px rgba(24,47,90,.08)}.evidence figcaption{font-size:12px;color:var(--muted);margin-top:6px}.question{border:1px solid var(--line);border-radius:13px;margin:14px 0;overflow:hidden}.question summary{cursor:pointer;padding:15px 16px;background:#fbfcfe;font-weight:760;color:#173f79}.question .answer{padding:14px 16px;border-top:1px solid var(--line);background:#fff}.answer .correct{font-weight:850;color:#0e766d}.answer ul{margin:8px 0 4px;padding-left:20px}.quiz-options{margin:9px 0 2px;padding-left:20px}.quiz-options li{margin:3px 0}.video-frame{margin:13px 0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#f4f6fa}.video-frame img{display:block;width:100%;max-width:100%;height:auto}.video-frame figcaption{padding:8px 10px;font-size:12px;color:var(--muted);border-top:1px solid var(--line)}.footer{color:var(--muted);font-size:12px;padding:6px 6px 32px}.source-list{font-size:14px;color:#53627a}.source-list li{margin:7px 0}.pill{font-size:11px;font-weight:800;display:inline-block;padding:2px 7px;border-radius:999px;margin-right:5px}.pill.book{color:#174d83;background:#e8f3ff}.pill.video{color:#5e3c96;background:#f0eaff}.pill.quiz{color:#8a5100;background:#fff2d4}.muted{color:var(--muted)}.split{display:grid;grid-template-columns:1.3fr .7fr;gap:16px}.big-number{font-size:32px;font-weight:900;color:#174982;line-height:1}.big-caption{font-size:12px;color:var(--muted);margin-top:6px}.hr{height:1px;background:var(--line);margin:22px 0}.print-only{display:none}@media(max-width:980px){.layout{grid-template-columns:1fr;padding:14px}.sidebar{position:relative;top:auto;max-height:none;display:grid;grid-template-columns:1fr 1fr;gap:10px;padding-right:0}.side-card{margin:0}.toc-list{max-height:240px}.topbar{padding:0 14px}.hero{padding:29px 24px}.hero h1{font-size:28px}.section{padding:23px 20px}.grid-2,.grid-3,.split{grid-template-columns:1fr}.columns{columns:1}}@media(max-width:620px){body{font-size:15px}.sidebar{grid-template-columns:1fr}.topmeta{display:none}.hero h1{font-size:25px}.section h2{font-size:21px}.table-wrap table{font-size:13px}.hero{border-radius:14px}.section{border-radius:13px}}@media print{body{background:#fff}.topbar,.sidebar{display:none}.layout{display:block;padding:0}.section,.hero{box-shadow:none;border:0;break-inside:avoid}.hero{color:#000;background:#fff;padding:0}.hero p,.hero .kicker{color:#333}.print-only{display:block}}


/* v1.1 首页思维导图 */
.mindmap-legend{display:flex;gap:10px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:13px;margin:8px 0 18px}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:800;vertical-align:middle}.badge.important{background:#ffe7a8;color:#8a5100;border:1px solid #f1cb68}.badge.secondary{background:#eef3fa;color:#4b5f7a;border:1px solid #d8e1ee}.mindmap-scroll{overflow:auto;padding-bottom:4px}.mindmap{min-width:900px;background:linear-gradient(180deg,#fbfdff 0%,#f8fbff 100%);border:1px solid var(--line);border-radius:16px;padding:18px 20px 18px 16px}.mind-root{display:inline-block;background:linear-gradient(135deg,#133f83,#2f78c8);color:#fff;font-weight:900;border-radius:12px;padding:10px 16px;margin:0 0 16px 8px;box-shadow:0 8px 20px rgba(24,54,106,.12)}.mindmap ul{list-style:none;margin:0;padding-left:32px;position:relative}.mindmap > ul{padding-left:0}.mindmap li{position:relative;padding:8px 0 0 24px}.mindmap li:before{content:"";position:absolute;left:9px;top:0;width:1px;height:100%;background:#cfdced}.mindmap li:after{content:"";position:absolute;left:9px;top:24px;width:14px;height:1px;background:#cfdced}.mindmap > ul > li:before{top:30px}.mindmap > ul > li:first-child:before{top:30px}.mindmap > ul > li:last-child:before,.mindmap li:last-child:before{height:24px}.mindmap > ul > li{padding-left:20px}.node{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px 12px;line-height:1.45;color:#28425f;box-shadow:0 5px 14px rgba(22,41,77,.05)}.node.primary{background:#edf4ff;border-color:#cfe0f5;font-weight:900;color:#143d78}.node.emphasis{background:#fff8e7;border-color:#f1d38a;color:#6f4700;font-weight:700}.mindmap .badge{margin-left:6px}.mindmap .node .badge{transform:translateY(-1px)}@media(max-width:980px){.mindmap{min-width:760px}}@media(max-width:620px){.mindmap{min-width:680px}.mind-root{font-size:15px}}

/* v1.2 首页理解型思维导图 */
.idea-legend{display:flex;gap:10px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:13px;margin:8px 0 18px}.legend-chip{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:800;border:1px solid transparent}.layer-base{background:#e9f2ff;color:#154680;border-color:#cfe0f5}.layer-judge{background:#e7f8f1;color:#0f6a4f;border-color:#bbe8d3}.layer-disease{background:#fff3df;color:#8b5200;border-color:#f2d59b}.layer-treatment{background:#fff0f1;color:#a2313e;border-color:#efc1c7}.layer-exam{background:#f1ecff;color:#5f49ad;border-color:#d7cdfb}.idea-map-wrap{margin:8px 0 6px}.idea-root-card{background:linear-gradient(135deg,#133f83 0%,#2f78c8 100%);color:#fff;border-radius:18px;padding:18px 20px;box-shadow:0 12px 28px rgba(23,58,110,.12);max-width:580px;margin:0 auto 18px;text-align:center}.idea-root-title{font-size:28px;font-weight:900;line-height:1.2}.idea-root-sub{font-size:14px;opacity:.96;margin-top:6px}.idea-branches{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.idea-branch{border:1px solid var(--line);border-radius:16px;padding:16px;background:#fff;box-shadow:0 6px 18px rgba(20,40,76,.045);position:relative}.idea-branch h3{margin:0 0 6px;font-size:18px}.idea-branch .branch-desc{margin:0 0 12px;color:var(--muted);font-size:14px;line-height:1.6}.branch-base{background:linear-gradient(180deg,#f9fbff 0,#fff 100%);border-top:5px solid #2f79c8}.branch-judge{background:linear-gradient(180deg,#f8fdfb 0,#fff 100%);border-top:5px solid #1aa272}.branch-disease{background:linear-gradient(180deg,#fffaf1 0,#fff 100%);border-top:5px solid #dd9a1d}.branch-treatment{background:linear-gradient(180deg,#fff8f8 0,#fff 100%);border-top:5px solid #d45461}.branch-exam{background:linear-gradient(180deg,#faf8ff 0,#fff 100%);border-top:5px solid #7b63d1;grid-column:1 / -1}.branch-links{display:flex;flex-wrap:wrap;gap:10px}.idea-node{display:inline-flex;align-items:flex-start;gap:6px;padding:9px 11px;border-radius:12px;border:1px solid var(--line);background:#fff;color:#29415f;line-height:1.45;font-size:14px;box-shadow:0 5px 12px rgba(18,36,70,.05);text-decoration:none}.idea-node:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(18,36,70,.08);text-decoration:none}.branch-base .idea-node:hover{border-color:#b8d3f2}.branch-judge .idea-node:hover{border-color:#bde8d8}.branch-disease .idea-node:hover{border-color:#f0d49d}.branch-treatment .idea-node:hover{border-color:#efc4cb}.branch-exam .idea-node:hover{border-color:#d5cdf6}.idea-node .badge{margin-left:4px;transform:translateY(1px)}@media(max-width:1100px){.idea-branches{grid-template-columns:1fr}}@media(max-width:620px){.idea-root-title{font-size:24px}.idea-root-card{padding:15px 16px}.idea-node{font-size:13px;padding:8px 10px}}