*{box-sizing:border-box}
:root{
  /* 品牌色：医疗青蓝（呼吸治疗语义），降饱和更沉稳 */
  --cy:#0e7490; --cy-d:#0b5f76; --cy-dd:#134e5e; --tl:#0d9488;
  /* 中性阶：白卡片 + 浅灰蓝底，贴近临床信息系统 */
  --bg:#f4f7f9; --card:#ffffff; --line:#e2e9ee; --line-2:#eef3f6; --surface:#f8fafb;
  --ink:#0f2c38; --ink-2:#3a545f; --mut:#6b8794;
  /* 语义色：正确 / 提示 / 错误 */
  --ok:#0f7b52; --okbg:#e9f6f1; --warn:#a8620a; --warnbg:#fdf5e8; --bad:#b3261e; --badbg:#fdedec;
  /* 阴影：克制分层 */
  --sh1:0 1px 2px rgba(15,44,56,.05);
  --sh2:0 2px 10px rgba(15,44,56,.07);
  --sh3:0 12px 36px rgba(15,44,56,.14);
  --r-s:8px; --r-m:10px;
}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.7;-webkit-font-smoothing:antialiased}
::selection{background:#cbe6ee;color:var(--cy-dd)}
a{color:var(--cy)}
/* ---------- 登录页 ---------- */
#loginView{min-height:calc(100vh - 70px);display:flex;align-items:center;justify-content:center;padding:24px 20px}
.login-wrap{width:920px;max-width:100%;display:grid;grid-template-columns:1.05fr 1fr;border-radius:var(--r-m);overflow:hidden;box-shadow:var(--sh3);border:1px solid var(--line)}
.login-hero{background:linear-gradient(155deg,#0a3444 0%,#0f5a6e 100%);color:#dff3f8;padding:40px 36px;display:flex;flex-direction:column;justify-content:center;position:relative}
.login-hero h1{margin:16px 0 8px;font-size:23px;letter-spacing:.5px;color:#fff;line-height:1.45}
.login-hero p{margin:0;font-size:13px;color:#a8dce7;line-height:1.9}
.login-hero .btn.ghost{background:rgba(255,255,255,.08);color:#eaf9fc;border-color:rgba(165,227,239,.45)}
.login-hero .btn.ghost:hover{background:rgba(255,255,255,.16);border-color:#a5e3ef;color:#fff}
.hero-feats{margin-top:22px;display:flex;flex-direction:column;gap:11px;font-size:13px;color:#cfeaf1;line-height:1.75}
.hero-feats>span{display:flex;align-items:flex-start;gap:10px}
.hero-feats .ft{flex:1;min-width:0}
.hero-feats .ft b{margin-right:2px}
.hero-feats i{width:18px;height:18px;border-radius:50%;background:rgba(103,232,249,.14);border:1px solid rgba(103,232,249,.4);flex:none;position:relative;margin-top:2px}
.hero-feats i::after{content:"";position:absolute;inset:5px;border-radius:50%;background:#67e8f9}
.ecg{width:100%;height:44px;display:block;margin-top:26px}
.ecg polyline{fill:none;stroke:#22d3ee;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:600;stroke-dashoffset:600;animation:ecgmove 3.2s linear infinite}
@keyframes ecgmove{0%{stroke-dashoffset:600}70%{stroke-dashoffset:0}100%{stroke-dashoffset:-600}}
@media(prefers-reduced-motion:reduce){.ecg polyline{animation:none;stroke-dashoffset:0}}
/* ---------- IP 形象：品牌吉祥物鸭子 + 主理人 RT王 ---------- */
.hero-duck{position:absolute;right:4px;bottom:0;height:min(330px,60%);max-width:46%;object-fit:contain;object-position:bottom center;pointer-events:none;user-select:none;filter:drop-shadow(0 12px 26px rgba(4,26,34,.38));z-index:0}
.login-hero h1,.login-hero p,.hero-feats,.login-hero .btn{position:relative;z-index:1}
.login-hero p,.hero-feats>span{max-width:calc(100% - 140px)}
/* 桌面端：下列选择器由 JS/内联样式迁移而来，取值与原内联写法一致，视觉不变（移动端在 @media 内覆写） */
.hero-sample{margin-top:18px;max-width:calc(100% - 150px)}
.login-actions{margin-top:20px;display:flex}
.login-actions>.btn{flex:1;margin-right:10px}
.login-actions>.btn:last-child{margin-right:0}
.foot-legal span{margin-left:14px}
.login-card-head{display:flex;align-items:center;gap:13px;margin-bottom:2px}
.card-avatar{width:60px;height:60px;border-radius:50%;object-fit:cover;flex:none;border:2px solid #dceef3;box-shadow:0 0 0 3px #f0f8fa;background:#fff}
.slogan-line{text-align:center;color:var(--mut);font-size:12px;letter-spacing:2px;margin-top:14px}
.slogan-line::before,.slogan-line::after{content:"·";color:#b9cfd9;margin:0 10px}
.pro-line{margin-top:16px;padding-top:13px;border-top:1px solid var(--line-2);display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--ink-2)}
.pro-line img{width:30px;height:30px;border-radius:50%;object-fit:cover;flex:none;border:1px solid var(--line);background:#fff}
.pro-line b{color:var(--cy-dd)}
.pro-follow{margin-left:auto;font-size:12px;color:var(--cy);border:1px solid #cfe5ec;padding:2px 10px;border-radius:999px;text-decoration:none;background:#f4fafc;white-space:nowrap}
.pro-follow:hover{background:#e6f4f8;border-color:var(--cy)}
/* ---------- 关于「一起呼吸鸭」卡片 ---------- */
.about-card{margin-top:14px;background:linear-gradient(135deg,#f1fafd,#ffffff);border:1px solid var(--line);border-radius:var(--r-m);padding:20px 22px;display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.about-card .ab-imgs{display:flex;gap:10px;flex:none}
.about-card .ab-imgs img{height:200px;width:auto;object-fit:contain;filter:drop-shadow(0 6px 14px rgba(15,44,56,.18))}
.about-card h3{margin:0 0 8px;font-size:16px;color:var(--cy-dd);letter-spacing:.3px}
.about-card .ab-text{flex:1;min-width:240px}
.about-card p{margin:0 0 7px;color:var(--ink-2);line-height:1.85;font-size:13.5px}
.about-card .sign{margin-top:8px;color:var(--mut);font-size:12.5px;font-style:normal}
@media(max-width:640px){.about-card .ab-imgs img{height:150px}}
.login-card{background:var(--card);padding:36px 34px}
.brand{font-size:19px;font-weight:700;color:var(--cy-dd);display:flex;align-items:center;gap:10px;letter-spacing:.5px}
/* 品牌标识：心电波形徽章（纯装饰，医疗识别性） */
.brand-mark{width:26px;height:26px;flex:none;display:block;border-radius:7px}
.brand-mark.sm{width:21px;height:21px;border-radius:6px}
.brand-dot{width:11px;height:11px;border-radius:50%;background:var(--cy);flex:none;position:relative}
.brand-dot::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:2px solid rgba(8,145,178,.35)}
.brand-sub{color:var(--mut);font-size:12px;margin:6px 0 20px;letter-spacing:.8px}
label{display:block;font-size:12px;color:var(--ink-2);font-weight:500;margin:16px 0 6px;letter-spacing:.3px}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:var(--r-s);font-size:14px;background:#fff;font-family:inherit;color:var(--ink);line-height:1.5;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--cy);box-shadow:0 0 0 3px rgba(14,116,144,.12)}
input::placeholder,textarea::placeholder{color:#9fb4bd}
/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:9px 18px;border-radius:var(--r-s);border:1px solid var(--cy-d);font-size:14px;font-weight:500;cursor:pointer;background:var(--cy-d);color:#fff;font-family:inherit;letter-spacing:.4px;transition:background .15s,border-color .15s,box-shadow .15s;text-decoration:none}
.btn:hover{background:var(--cy-dd);border-color:var(--cy-dd)}
.btn:active{transform:translateY(.5px)}
.btn:focus-visible{outline:2px solid var(--cy);outline-offset:2px}
.btn.ghost{background:#fff;color:var(--cy-dd);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--cy);background:var(--surface);color:var(--cy-dd)}
.btn.ghost:focus-visible{outline-color:var(--cy)}
.btn.small{padding:5px 12px;font-size:12px;border-radius:7px}
.btn.danger{background:#b3261e;border-color:#b3261e}
.btn.danger:hover{background:#8f1d18;border-color:#8f1d18}
/* ---------- 布局 ---------- */
#appView{display:none;min-height:100vh}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:12px 22px 0;display:flex;align-items:center;gap:14px;flex-wrap:wrap;position:sticky;top:0;z-index:20;box-shadow:var(--sh1)}
.topbar .brand{font-size:16px;margin:0;color:var(--cy-dd)}
.topbar .brand-sub{margin:0;color:var(--mut);font-size:11px;letter-spacing:.8px}
.userbox{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2)}
.userbox .btn{padding:5px 12px}
.tabs{display:flex;gap:2px;overflow-x:auto;width:100%;margin-top:4px}
.tab{padding:10px 14px;cursor:pointer;color:var(--mut);white-space:nowrap;font-size:13.5px;border-bottom:2px solid transparent;letter-spacing:.4px;border-radius:6px 6px 0 0;transition:color .15s,background .15s}
.tab:hover{color:var(--cy-d);background:var(--surface)}
.tab.active{color:var(--cy-dd);border-bottom-color:var(--cy);font-weight:600;background:transparent}
#main{max-width:1040px;margin:0 auto;padding:24px 20px 64px}
#quizArea{scroll-margin-top:108px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);padding:18px 20px;margin-bottom:14px;box-shadow:var(--sh1)}
.card h2{margin:0 0 6px;font-size:15.5px;color:var(--cy-dd);letter-spacing:.3px;border-left:3px solid var(--cy);padding-left:9px;font-weight:600}
.card .sub{color:var(--mut);font-size:12px;margin-bottom:16px}
.grid{display:grid;gap:12px}
.grid.c2{grid-template-columns:1fr 1fr}
.grid.c3{grid-template-columns:repeat(3,1fr)}
/* ================= 手机端（≤640px）专属：只压缩 Hero / 登录卡 / 页脚，桌面端不受影响 ================= */
@media(max-width:640px){
  .grid.c2,.grid.c3{grid-template-columns:1fr}.login-wrap{grid-template-columns:1fr}
  /* 1. 登录区整屏铺满：去掉 #loginView 两侧 20px 留白与圆角 */
  #loginView{padding:0;align-items:flex-start}
  .login-wrap{width:100%;border-radius:0;border-left:0;border-right:0}
  /* 2. Hero 压缩：总高目标 ≤400px，让 slogan + 登录入口落在首屏 */
  .login-hero{padding:14px 18px 6px}
  .login-hero .ecg{height:26px;margin-top:2px}
  .login-hero h1{margin:8px 0 6px;font-size:20px;line-height:1.35}
  .login-hero p{margin:0;font-size:11.5px;line-height:1.6}
  /* 三卖点：仅保留短语标签，长描述收起（X5 不支持的 gap 用相邻 margin 兜底） */
  .hero-feats{margin-top:10px;gap:0;font-size:11.5px;line-height:1.5}
  .hero-feats>span+span{margin-top:6px}
  .hero-feats .desc{display:none}
  .hero-feats>span{display:flex;align-items:flex-start;gap:8px}
  .hero-feats i{width:14px;height:14px;margin-top:1px}
  .hero-feats i::after{inset:4px}
  .hero-sample{margin-top:10px;max-width:100%}
  .hero-sample .btn{display:block;width:100%;padding:9px 12px;font-size:12.5px}
  /* 鸭子：改为文档流居中；宽 200px + 高 118px 用 contain 等比装入，避免 200px 宽时高达 313px 撑爆 Hero */
  .hero-duck{position:static;width:200px;max-width:200px;height:118px;max-height:118px;object-fit:contain;object-position:center bottom;align-self:center;margin:4px auto -2px;filter:none;z-index:1}
  .login-hero p,.hero-feats>span{max-width:100%}
  /* 3. 登录卡全宽 + 触屏友好：输入框 ≥44px，按钮各 50% 且不换行 */
  .login-card{padding:20px 16px 22px}
  .login-card-head{gap:10px}
  .login-card .card-avatar{width:48px;height:48px}
  .login-card .brand{font-size:17px}
  .login-card .brand-sub{margin:4px 0 14px;font-size:11px;letter-spacing:.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .login-card label{margin:12px 0 6px}
  .login-card input{height:46px;min-height:46px;padding:0 12px;font-size:16px;line-height:normal}
  .login-actions{margin-top:16px;display:flex}
  .login-actions>.btn{flex:1 1 0;min-width:0;font-size:13px;padding:11px 4px;white-space:nowrap;margin-right:10px}
  .login-actions>.btn:last-child{margin-right:0}
  .login-card .slogan-line{margin-top:12px;font-size:11.5px;letter-spacing:1.5px}
  /* 4. 主理人行：第一行头像+「主理人 RT王 · 呼吸治疗师」，第二行整行「关注公众号 →」按钮（44px 左对齐） */
  .pro-line{flex-wrap:wrap;margin-top:14px;padding-top:11px;font-size:13px;line-height:1.6;row-gap:8px}
  .pro-line span{white-space:nowrap;flex:1 1 auto;min-width:0}
  .pro-line .pro-follow{flex:1 1 100%;width:100%;margin-left:0;font-size:14px;padding:0 16px;height:44px;display:flex;align-items:center;justify-content:flex-start;border-radius:8px;border-color:#cfe5ec}
  .pro-line .pro-follow::after{content:" →"}
  /* 分标签正确率表：手机端第一列「二级标签」不拆行（"血气分析"曾被压成两行） */
  table.tagTbl th:first-child,table.tagTbl td:first-child{min-width:80px;white-space:nowrap}
  table.tagTbl td:first-child{font-size:12.5px}
  #main{padding:16px 12px 60px}
  .card{padding:14px}
  .topbar{padding:8px 12px 0}
  /* 手机端表格横向滑动，避免列挤压溢出 */
  table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  th,td{padding:7px 8px}
  .modal{padding:16px}
  /* 触屏无 hover，去掉位移效果 */
  .opt:hover{transform:none}
  .q-stem{font-size:15.5px}
  .btn{padding:10px 16px}
/* 5. 页脚：11px、逐行居中、备案号与版权分行 */
  /* 注：#siteFoot 基础规则位于本文件靠后处，为避免同选择器被其后定义的规则盖掉，页脚移动端覆写统一放在样式表末尾 */
  /* 6. 微信 X5 / 老内核兜底 */
  /* 6a. 图片统一自适应，防溢出（类名规则优先于此元素选择器，不影响头像等定尺图） */
  img{max-width:100%;height:auto}
  /* 6b. 关闭移动端字体自动放大导致的布局抖动 */
  body{-webkit-text-size-adjust:100%}
}
.stat-num{font-size:26px;font-weight:700;color:var(--cy-dd);font-variant-numeric:tabular-nums;font-family:"SF Mono",Consolas,monospace;letter-spacing:-.5px;line-height:1.25}
.stat-label{font-size:12px;color:var(--mut);letter-spacing:.5px}
/* ---------- 表格 ---------- */
table{width:100%;border-collapse:collapse;font-size:13px;border:1px solid var(--line)}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line-2);vertical-align:top}
th{background:var(--surface);color:var(--ink-2);font-weight:600;font-size:12px;white-space:nowrap;letter-spacing:.3px;border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:0}
tr:hover td{background:#f6fafb}
.tag{display:inline-block;padding:2px 9px;border-radius:5px;font-size:11px;font-weight:500;background:#eef6f8;color:var(--cy-dd);margin:1px 2px;border:1px solid #dbe9ee;letter-spacing:.2px}
/* 分层解析小标题 */
.ana-sec{margin-bottom:12px;padding-left:11px;border-left:3px solid #b6dbe6}
.ana-sec .ana-h{font-size:12.5px;font-weight:500;margin-bottom:4px}
.ana-sec.s1{border-left-color:var(--cy)}.ana-sec.s1 .ana-h{color:var(--cy-dd)}
.ana-sec.s2{border-left-color:#d97706}.ana-sec.s2 .ana-h{color:#b45309}
.ana-sec.s3{border-left-color:#0d9488}.ana-sec.s3 .ana-h{color:#0f766e}
.ana-sec.s4{border-left-color:#cbd5e1}.ana-sec.s4 .ana-h{color:var(--mut)}
.ana-sec .ana-t{font-size:13px;line-height:1.75;color:#374151}
/* 考点词链接（解析内可点击，跳同类题目汇总） */
.kw{color:var(--cy-dd);cursor:pointer;border-bottom:1px dashed var(--cy);font-weight:500}
.kw:hover{background:#e3f3f9;border-radius:3px}
.kwbar{margin-top:12px;padding-top:10px;border-top:1px dashed #e2e8f0;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.kwbar:before{content:"本题考点：";font-size:12px;color:var(--mut)}
/* 每日学习计划 */
.plan-row{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px solid #eef4f7;flex-wrap:wrap}
.plan-row:last-child{border-bottom:0}
.plan-ic{width:34px;height:34px;border-radius:9px;background:#e3f3f9;display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}
.plan-main{flex:1;min-width:150px}
.plan-t{font-size:14px;font-weight:500}
.plan-d{font-size:12px;color:var(--mut);margin-top:2px}
.plan-done{opacity:.55}
.plan-done .plan-t{text-decoration:line-through}
/* 可点击标签（点击汇总同分类题目） */
.tag.tagbtn{cursor:pointer;transition:all .15s}
.tag.tagbtn:hover{background:var(--cy);color:#fff;border-color:var(--cy)}
.tagrow{display:flex;gap:10px;align-items:flex-start;padding:9px 2px;border-bottom:1px solid #eef4f7;cursor:pointer}
.tagrow:hover{background:#f6fbfd}
.tagrow .tr-stem{flex:1;min-width:0;font-size:13px;color:#1f2937;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tag.g{background:var(--okbg);color:var(--ok);border-color:#c6e4d8}
.tag.y{background:var(--warnbg);color:var(--warn);border-color:#f0dcb8}
.tag.r{background:var(--badbg);color:var(--bad);border-color:#f3cccc}
.badge{display:inline-block;padding:3px 10px;border-radius:5px;font-size:12px;font-weight:500;border:1px solid}
.badge.g{color:var(--ok);background:var(--okbg);border-color:#c6e4d8}
.badge.y{color:var(--warn);background:var(--warnbg);border-color:#f0dcb8}
.badge.r{color:var(--bad);background:var(--badbg);border-color:#f3cccc}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;align-items:center}
.toolbar input,.toolbar select{width:auto}
.toolbar .sep{width:1px;height:22px;background:var(--line)}
/* ---------- 刷题 ---------- */
.q-meta{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px;align-items:center}
.q-stem{font-size:15.5px;margin-bottom:14px;white-space:pre-wrap;line-height:1.85;color:#0f2c38}
.q-trans{background:var(--surface);border-left:3px solid var(--cy);padding:9px 13px;color:var(--ink-2);font-size:13px;margin-bottom:14px;border-radius:0 var(--r-s) var(--r-s) 0;line-height:1.75}
/* 2027 新卷·临床判断题：自包含病例场景与提问分块渲染 */
.cj-vig{background:#faf8ff;border-left:4px solid #7c3aed;padding:12px 14px;border-radius:0 var(--r-m) var(--r-m) 0;line-height:1.95;margin-bottom:13px;white-space:pre-wrap;font-size:14.5px}
.cj-q{font-size:15.5px;font-weight:600;margin-bottom:14px;white-space:pre-wrap;line-height:1.8}
/* CJ 渐进式披露 & 认知任务视觉强化（2027 新卷） */
.cj-badge{background:#7c3aed;color:#fff;border-color:#7c3aed;font-weight:600;margin-left:2px}
.cj-opt{margin-bottom:12px} /* 比普通题选项间距大 4px */
.cj-expand{display:block;width:100%;margin:10px 0 4px;text-align:center;font-weight:500}
.cj-ig-prompt{margin:8px 0 6px;color:#7c3aed;font-size:13.5px;font-weight:600}
.cj-ig-sep{height:0;border-top:1px dashed #c4b5fd;margin:0 0 12px}
.cj-cog-label{display:inline-block;background:#faf8ff;border:1px solid #c4b5fd;color:#6d28d9;border-radius:6px;padding:5px 12px;font-size:13px;font-weight:600;margin-bottom:14px}
.opt{display:flex;gap:10px;padding:11px 14px;border:1px solid var(--line);border-radius:var(--r-s);margin-bottom:8px;cursor:pointer;transition:background .12s,border-color .12s,box-shadow .12s;background:#fff;line-height:1.6}
.opt:hover{border-color:#8fbccb;background:var(--surface)}
.opt.sel{border-color:var(--cy);background:#eef7fa;box-shadow:inset 0 0 0 1px var(--cy)}
.opt.right{border-color:var(--ok);background:var(--okbg);box-shadow:inset 0 0 0 1px var(--ok)}
.opt.wrongpick{border-color:var(--bad);background:var(--badbg);box-shadow:inset 0 0 0 1px var(--bad)}
.opt.right::after,.opt.wrongpick::after{margin-left:auto;align-self:center;font-weight:700;font-size:15px;flex:none;padding-left:8px}
.opt.right::after{content:"✓";color:var(--ok)}
.opt.wrongpick::after{content:"✕";color:var(--bad)}
.opt .letter{font-weight:700;color:var(--mut);flex:none;width:18px}
.opt.sel .letter{color:var(--cy-d)}
.opt.right .letter{color:var(--ok)}
.opt.wrongpick .letter{color:var(--bad)}
.opt .otext{flex:1;text-align:left}
.quiz-foot{display:flex;gap:10px;align-items:center;margin-top:18px;flex-wrap:wrap}
.verdict{font-size:15.5px;font-weight:700;margin-bottom:12px;letter-spacing:.4px}
.verdict.ok{color:var(--ok)}
.verdict.no{color:var(--bad)}
/* 🦆 鸭子表情反馈 */
.duck-face{display:block;height:88px;width:auto;border-radius:8px;animation:duckIn .38s ease both}
.duck-face.lg{filter:drop-shadow(0 6px 16px rgba(15,44,56,.22))}
@keyframes duckIn{from{opacity:0;transform:translateY(6px) scale(.94)}to{opacity:1;transform:none}}
.empty-duck{display:flex;flex-direction:column;align-items:center;gap:10px;padding:6px 0 2px;text-align:center}
.empty-duck .duck-face{margin:0 auto}
.feedtip{margin:-4px 0 12px;padding:10px 14px;border-radius:var(--r-s);font-size:13px;line-height:1.75}
.feedtip.ok-tip{background:var(--okbg);border:1px solid #c6e4d8;color:#0b5d3f}
.feedtip.no-tip{background:var(--badbg);border:1px solid #f3cccc;color:#8f1d18}
.recall-box{margin-top:14px;padding:14px;border:1px dashed #a9cfdb;border-radius:var(--r-s);background:var(--surface);text-align:center}
.favtag{cursor:pointer;background:#fefce8;color:#a16207;border:1px solid #fde68a}
/* 闪卡筛选芯片（范围 / 标签，点击即时筛选） */
.chipbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:10px}
.chip{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border-radius:999px;font-size:12.5px;border:1px solid var(--line);background:#fff;color:var(--cy-dd);cursor:pointer;transition:all .15s;user-select:none;white-space:nowrap}
.chip:hover{border-color:var(--cy);background:#f2fafc}
.chip.on{background:linear-gradient(135deg,var(--cy-d),var(--tl));color:#fff;border-color:transparent}
.chip.dim{opacity:.45}
.chip.gold{color:#a16207;border-color:#fde68a;background:#fefce8}
.chip.gold:hover{background:#fef3c7}
.chip.gold.on{background:linear-gradient(135deg,#d97706,#a16207);color:#fff;border-color:transparent}
.chip.fire{color:var(--bad);border-color:#f0c9c9;background:var(--badbg)}
.chip.fire:hover{background:#fbe4e4}
.chip.fire.on{background:linear-gradient(135deg,#dc2626,#b91c1c);color:#fff;border-color:transparent}
.chip .n{font-size:11px;opacity:.7;font-weight:600;font-variant-numeric:tabular-nums}
.chip.on .n{opacity:.92}
.chip .st{color:#d97706;font-size:11px;font-weight:600}
.chip.on .st{color:#ffd88a}
.chipsep{width:1px;height:18px;background:var(--line)}
.favbtn{cursor:pointer;user-select:none}
.favbtn:hover{filter:brightness(.95)}
#cardTip{font-size:12px;color:var(--ok);min-height:18px}
/* 🦆 P1 鸭子表情：Toast / 弹窗 / 加载中 */
/* ---------- 页面内确认框（替代原生 confirm，全端一致） ---------- */
.uic-wrap{position:fixed;inset:0;z-index:10000;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;transition:opacity .16s}
.uic-wrap.show{opacity:1}
.uic-mask{position:absolute;inset:0;background:rgba(15,44,56,.45)}
.uic-panel{position:relative;background:#fff;border-radius:14px;padding:22px 22px 18px;max-width:400px;width:100%;box-shadow:0 22px 60px rgba(4,26,34,.32)}
.uic-msg{font-size:14.5px;line-height:1.85;color:var(--ink);white-space:normal;word-break:break-word}
.uic-actions{display:flex;margin-top:18px}
.uic-actions .btn{flex:1;margin-right:10px}
.uic-actions .btn:last-child{margin-right:0}
.uic-pick{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.uic-pick .btn{padding:11px 6px;line-height:1.35}
.uic-pick .btn span{font-size:11.5px;opacity:.85;font-weight:400}
/* ---------- 开通入口：导航按钮 + 解锁墙（链 /open/buy.html） ---------- */
.rt-open-btn{display:inline-block;background:var(--cy-d);color:#fff;text-decoration:none;
  font-size:13.5px;font-weight:600;padding:7px 15px;border-radius:20px;line-height:1.3;
  transition:.15s;cursor:pointer;white-space:nowrap}
.rt-open-btn:hover{filter:brightness(1.08);opacity:.95}

.rt-paywall-mask{position:fixed;inset:0;background:rgba(8,38,48,.55);
  display:none;align-items:center;justify-content:center;z-index:9999;
  font-family:inherit;padding:20px}
.rt-paywall-mask.show{display:flex}
.rt-paywall-card{background:#fff;width:min(88vw,380px);border-radius:16px;
  padding:30px 24px 24px;text-align:center;position:relative;box-shadow:0 12px 40px rgba(4,26,34,.28)}
.rt-paywall-card .rt-pw-close{position:absolute;top:10px;right:16px;font-size:24px;
  color:#9aa4ae;cursor:pointer;line-height:1;background:none;border:0;padding:0}
.rt-paywall-card .rt-pw-emoji{font-size:40px;line-height:1;margin-bottom:10px}
.rt-paywall-card h3{font-size:20px;color:var(--ink,#10333e);margin:0 0 10px;font-weight:700}
.rt-paywall-card .rt-pw-note{font-size:13px;color:#5f7d88;line-height:1.75;margin:0 0 18px;text-align:left}
.rt-paywall-card .rt-pw-acts{display:flex;gap:10px}
.rt-paywall-card .rt-pw-acts .btn{flex:1;margin:0}
.rt-paywall-card .rt-open-btn{display:block;width:100%;box-sizing:border-box;text-align:center;padding:12px 0;font-size:15px;border-radius:10px}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(16px);display:flex;align-items:center;gap:8px;background:rgba(8,38,48,.94);color:#fff;padding:10px 16px;border-radius:999px;font-size:14px;box-shadow:0 8px 24px rgba(4,26,34,.32);opacity:0;pointer-events:none;z-index:9999;transition:opacity .25s,transform .25s;max-width:90vw}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.duck-mini{height:24px;width:24px;border-radius:6px;object-fit:contain;flex:none}
/* 隐藏态必须 visibility:hidden + pointer-events:none，否则透明遮罩仍会吞掉全屏点击 */
.duck-modal-mask{position:fixed;inset:0;background:rgba(4,26,34,.5);display:flex;align-items:center;justify-content:center;z-index:9998;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .25s;padding:20px}
.duck-modal-mask.show{opacity:1;visibility:visible;pointer-events:auto}
.duck-modal{background:#fff;border-radius:18px;padding:26px 30px;max-width:340px;width:100%;text-align:center;box-shadow:0 20px 60px rgba(4,26,34,.35);transform:scale(.92);transition:transform .28s cubic-bezier(.2,.9,.3,1.2)}
.duck-modal-mask.show .duck-modal{transform:scale(1)}
.duck-modal h3{margin:12px 0 6px;font-size:18px;color:#0b2e38}
.duck-modal p{margin:0;color:#5b7280;font-size:14px;line-height:1.7}
.duck-think-spin{animation:duckSway 1.6s ease-in-out infinite;transform-origin:50% 60%}
/* ---------- 后台：每日注册/登录柱状图（纯 CSS，无外部依赖） ---------- */
.gb-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:4px}
.gb{display:flex;align-items:flex-end;gap:4px;min-width:560px;height:130px;padding-top:8px}
.gb-col{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%}
.gb-bars{display:flex;align-items:flex-end;gap:2px;width:100%;height:100%;justify-content:center}
.gb-bar{width:42%;min-height:0;border-radius:3px 3px 0 0;transition:height .3s}
.gb-bar.reg{background:#0e7490}
.gb-bar.login{background:#34d399}
.gb-x{font-size:9px;color:var(--mut);margin-top:4px;white-space:nowrap;transform:scale(.9)}
.gb-legend{margin-top:10px;font-size:12px;color:var(--mut);display:flex;align-items:center}
.gb-legend .lg{display:inline-block;width:10px;height:10px;border-radius:2px;margin:0 4px 0 12px;vertical-align:-1px}
.gb-legend .lg:first-child{margin-left:0}
.gb-legend .lg.reg{background:#0e7490}
.gb-legend .lg.login{background:#34d399}
/* ---------- 注册 / 找回密码表单 ---------- */
.login-alt{text-align:center;margin-top:12px;font-size:12.5px}
.login-alt a{color:var(--cy);text-decoration:none}
.login-alt a:hover{text-decoration:underline}
.code-row{display:flex;align-items:center;margin-top:0}
.code-row input{flex:1;min-width:0}
.cap-img{flex:none;margin-left:10px;width:88px;height:32px;border:1px solid var(--line);border-radius:6px;background:#fbfdfe;cursor:pointer}
.pwd-tip{min-height:18px;margin-top:6px;font-size:12px;color:var(--mut)}
label.agree{display:flex;align-items:flex-start;gap:7px;margin:16px 0 0;font-size:12px;font-weight:400;line-height:1.6;color:var(--mut);cursor:pointer}
label.agree input{width:auto;flex:none;margin:2px 0 0;height:auto}
.dev-code{margin-top:10px;padding:9px 12px;border-radius:8px;background:var(--warnbg);border:1px dashed var(--warn);font-size:12.5px;color:var(--warn);line-height:1.6}
@keyframes duckSway{0%,100%{transform:rotate(-7deg)}50%{transform:rotate(7deg)}}
.duck-loading{display:flex;flex-direction:column;align-items:center;gap:10px;padding:10px 0;text-align:center;color:var(--mut);font-size:13px}
.duck-loading .duck-face{margin:0 auto;height:80px}
@media(max-width:640px){.chip{padding:7px 13px;font-size:13px}}
/* 闪卡记忆：顶部学习提示 / 正反面配色区分 / 底部免责声明 */
.cardtip{margin-top:10px;padding:10px 13px;border-radius:10px;font-size:12.5px;line-height:1.85;background:var(--warnbg);border:1px solid #fde68a;color:#92400e}
.card-face-front{border:2px solid var(--cy)!important;border-left:6px solid var(--cy)!important;box-shadow:0 8px 24px rgba(8,145,178,.13)!important}
.card-face-back{border:2px solid var(--ok)!important;border-left:6px solid var(--ok)!important;box-shadow:0 8px 24px rgba(15,118,110,.13)!important}
.face-tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 10px;border-radius:999px;color:#fff;letter-spacing:.5px}
.face-tag.front{background:var(--cy)}
.face-tag.back{background:var(--ok)}
.disclaimer{margin:14px 0 4px;text-align:center;font-size:11.5px;line-height:1.85;color:var(--mut)}
@media(max-width:640px){#cardFace{padding:16px 15px!important;min-height:230px!important}
  .cardnav{gap:8px!important}
  .cardnav .btn{padding:10px 14px!important;font-size:14px}
  .ratebar{gap:8px!important}
  .ratebar .btn{flex:1 1 30%;padding:11px 8px!important;font-size:13px}}
.cornell-edit textarea{width:100%;box-sizing:border-box;border:1px solid var(--line);border-radius:9px;padding:9px 12px;font-size:13px;font-family:inherit;line-height:1.7;resize:vertical;background:#fff}
.cornell-edit .cc{margin-top:12px;font-weight:600;color:var(--cy-dd);font-size:12.5px}
.note-panel{background:#fffdf5}
.note-panel summary{background:#fefce8}
.ana{margin-top:14px;border:1px solid var(--line);border-radius:11px;overflow:hidden}
.ana summary{padding:10px 15px;cursor:pointer;font-weight:500;color:var(--cy-dd);background:#f4fafc;font-size:13px;list-style:none}
.ana summary::before{content:"▸ ";color:var(--cy)}
.ana[open] summary::before{content:"▾ "}
.ana .ana-body{padding:12px 16px;font-size:13px;white-space:pre-wrap;border-top:1px solid #eef4f7}
.cornell{display:grid;grid-template-columns:1fr 2fr;gap:1px;background:var(--line);border-radius:9px;overflow:hidden;margin-top:8px}
.cornell div{background:#fff;padding:10px 12px;font-size:12px}
.cornell .cc{background:#f4fafc;color:var(--mut);font-weight:500}
.feynman{background:#fffbeb;border:1px solid #fde68a;border-radius:9px;padding:12px 15px;font-size:13px;white-space:pre-wrap;margin-top:8px}
.locktip{background:var(--warnbg);border:1px solid #f2dcae;color:#7c4a06;border-radius:11px;padding:12px 15px;font-size:13px;margin-bottom:16px}
.bar{height:8px;border-radius:4px;background:#e4edf1;overflow:hidden}
.bar span{display:block;height:100%;background:linear-gradient(90deg,var(--cy-d),var(--tl))}
.bar.good span{background:linear-gradient(90deg,#0d9488,#34d399)}
.bar.mid span{background:linear-gradient(90deg,#d97706,#fbbf24)}
.bar.bad span{background:linear-gradient(90deg,#b91c1c,#f87171)}
/* ---------- 富媒体 ---------- */
.media{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0}
.media img{max-width:100%;max-height:260px;border-radius:10px;border:1px solid var(--line);cursor:zoom-in}
.media video{max-width:100%;width:340px;border-radius:10px;border:1px solid var(--line);background:#000}
.mchip{display:inline-flex;align-items:center;gap:8px;background:#f2fafc;border:1px solid var(--line);border-radius:9px;padding:6px 10px;font-size:12px;margin:2px}
.mchip img{width:52px;height:38px;object-fit:cover;border-radius:6px}
.mchip .x{cursor:pointer;color:var(--bad);font-weight:700;padding:0 3px}
.mtools{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
/* ---------- 互动讨论 ---------- */
.discuss{margin-top:16px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fbfeff}
.disc-head{padding:10px 15px;font-size:13px;font-weight:500;color:var(--cy-dd);background:#f0f9fc;border-bottom:1px solid #e6f1f6;display:flex;align-items:center;gap:8px}
.disc-count{background:var(--cy);color:#fff;border-radius:999px;font-size:11px;padding:0 8px}
.cmt{display:flex;gap:10px;padding:12px 15px;border-bottom:1px solid #f0f6f9}
.avatar{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--cy-d),var(--tl));color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex:none}
.cmt .cbody{flex:1;min-width:0}
.cmt .chead{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.cmt .cname{font-weight:600;font-size:13px;color:var(--cy-dd)}
.cmt .cname.me::after{content:"我";font-size:10px;background:#e0f7fa;color:var(--cy-d);border-radius:4px;padding:0 4px;margin-left:4px}
.cmt .ctime{font-size:11px;color:var(--mut)}
.cmt .ctext{font-size:13px;margin:3px 0;white-space:pre-wrap;word-break:break-word}
.cmt .cdel{font-size:11px;color:var(--bad);cursor:pointer;margin-left:auto}
.cmt .cfloor{font-size:10px;color:#6ba8b8;background:#eaf6f9;border-radius:4px;padding:1px 6px}
.cmt .crep{font-size:11px;color:var(--cy-d);cursor:pointer}
.cmt .crep:hover{text-decoration:underline}
.cmt-replies{margin-top:8px;border-left:2px solid #dbeef4;padding-left:12px;display:flex;flex-direction:column;gap:8px}
.cmt-reply{background:#f4fafc;border-radius:8px;padding:7px 10px}
.cmt-reply .cname{font-size:12px}
.cmt-reply .ctext{font-size:12.5px;margin:2px 0}
.cmt-reply .chead{display:flex;align-items:baseline;gap:6px;flex-wrap:wrap}
.cmt-reply .cdel{margin-left:auto}
.rto{font-size:11px;color:var(--mut)}
.reply-chip{font-size:12px;color:var(--cy-d);background:#e3f4f8;border-radius:8px;padding:5px 10px;margin-bottom:8px}
.reply-chip .rx{color:var(--bad);cursor:pointer;margin-left:8px}
.disc-empty{padding:16px;text-align:center;color:#9fbec8;font-size:12px}
.cmt-form{padding:12px 15px;background:#f7fcfe}
.cmt-form textarea{min-height:56px;font-size:13px}
.cmt-media-bar{margin-top:8px}
/* ---------- 关注题目 + 回复红点 ---------- */
.follow-mark{background:#fff7e6;color:#b45309;border:1px solid #fde3a7}
.follow-label{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--cy-dd);cursor:pointer;user-select:none}
.follow-label input{width:auto;margin:0;cursor:pointer}
.badge-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#dc2626;margin-left:6px;vertical-align:super;box-shadow:0 0 0 2px #fff}
.disc-head .badge-dot{vertical-align:middle;margin-left:4px}
/* ---------- 弹窗 ---------- */
#overlay{display:none;position:fixed;inset:0;background:rgba(15,44,56,.42);z-index:50;align-items:flex-start;justify-content:center;padding:30px 16px;overflow:auto}
#overlay.on{display:flex}
.modal{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;max-width:740px;width:100%;margin-bottom:40px;box-shadow:var(--sh3)}
.modal h3{margin:0 0 14px;font-size:16px;color:var(--cy-dd);border-left:3px solid var(--cy);padding-left:9px;font-weight:600}
.modal .row{display:flex;gap:12px;flex-wrap:wrap}
.modal .row>div{flex:1;min-width:150px}
.fmt{background:var(--surface);border:1px dashed #b9d6e0;border-radius:var(--r-s);padding:10px 13px;font-size:12px;white-space:pre-wrap;color:#3f5c67;margin:10px 0;font-family:Consolas,monospace}
.muted{color:var(--mut);font-size:12px}
.right{text-align:right}
.empty{text-align:center;color:#93aeb9;padding:36px 0;font-size:13px}
/* ---------- 临床判断「准备中」占位页 ---------- */
.cj-soon{text-align:center;padding:52px 24px 44px}
.cj-soon-emoji{font-size:56px;line-height:1;margin-bottom:14px}
.cj-soon-title{font-size:19px;margin:0 0 10px;border:0;padding:0;color:var(--cy-dd);border-left:0}
.cj-soon-sub{font-size:13.5px;color:var(--mut);line-height:1.9;max-width:420px;margin:0 auto}
.imgview{max-width:92vw;max-height:82vh;border-radius:10px;display:block;margin:0 auto}
/* ---------- 关注公众号二维码弹窗 ---------- */
.qr-modal{max-width:320px;margin:0 auto;text-align:center;padding:6px 4px}
.qr-title{font-weight:600;font-size:15px;margin-bottom:12px}
.qr-img{width:220px;max-width:70vw;height:auto;border-radius:10px;border:1px solid var(--hair);display:block;margin:0 auto;background:#fff;padding:8px}
.qr-tip{margin-top:12px;font-size:12.5px;color:#7d97a3;line-height:1.6}
.qr-miss{margin-top:14px;font-size:13px;color:var(--warn);background:var(--warnbg);border:1px solid var(--warn);border-radius:8px;padding:12px}
/* ---------- 细节：焦点可见性 / 滚动条 / 页脚 ---------- */
a:focus-visible,button:focus-visible,summary:focus-visible,[onclick]:focus-visible{outline:2px solid var(--cy);outline-offset:2px}
summary{cursor:pointer}
hr{border:0;border-top:1px solid var(--line-2);margin:14px 0}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#cddbe1;border-radius:6px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#b6cbd4}
#siteFoot{background:#fff;border-top:1px solid var(--line);padding:20px 20px 24px;text-align:center;color:var(--mut);font-size:12px;line-height:1.95}
#siteFoot .foot-brand{color:var(--cy-dd);font-weight:600;font-size:13px;margin-bottom:3px;letter-spacing:.3px}
#siteFoot a{color:var(--mut);text-decoration:none}
#siteFoot a:hover{color:var(--cy-d);text-decoration:underline}
/* 页脚中段：桌面端用「　·　」把两段接成一行，手机端拆两行 */
.foot-mid span+span::before{content:"　·　"}
/* ---------- 手机端页脚（必须放在 #siteFoot 基础规则之后，否则同选择器被后者盖掉） ---------- */
@media(max-width:640px){
  #siteFoot{padding:16px 14px 22px;font-size:11px;line-height:1.85}
  #siteFoot .foot-brand{font-size:12px;margin-bottom:2px}
  .foot-legal span{display:block;margin-left:0}
  .foot-mid span{display:block}
  .foot-mid span+span::before{content:""}
}