/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#faf8f5;--bg2:#fff;--text:#2a2320;--text2:#6b5d52;--accent:#9d2933;--accent2:#6e1423;
  --hot:#c1121f;--warm:#bc6c25;--green:#3a7d44;--border:#e8e0d6;
  --sidebar-bg:#2b211c;--sidebar-text:#cdbfb2;--sidebar-active:#fff;
  --radius:10px;--shadow:0 2px 12px rgba(60,40,20,.07);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC",sans-serif;
  --serif:Georgia,"Times New Roman","Noto Serif SC",serif;
  --mono:"JetBrains Mono","Fira Code","Cascadia Code",monospace;
}
html{scroll-behavior:smooth;font-size:15px}
body{font-family:var(--font);color:var(--text);background:var(--bg);display:flex;min-height:100vh;line-height:1.7}

/* ===== Sidebar ===== */
.sidebar{
  position:fixed;top:0;left:0;width:260px;height:100vh;background:var(--sidebar-bg);
  color:var(--sidebar-text);display:flex;flex-direction:column;z-index:100;
  overflow-y:auto;scrollbar-width:thin;
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.1);border-radius:3px}
.brand{display:flex;align-items:center;gap:12px;padding:24px 20px 16px}
.logo{width:40px;height:40px;border-radius:10px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}
.brand h1{font-size:16px;color:#fff;font-weight:600}
.brand p{font-size:11px;opacity:.6}
nav{flex:1;padding:0 12px}
.nav-section{margin-bottom:8px}
.nav-title{display:block;font-size:10px;text-transform:uppercase;letter-spacing:1.5px;color:rgba(255,255,255,.3);padding:12px 8px 4px;font-weight:600}
.nav-item{display:block;padding:6px 12px;border-radius:6px;color:var(--sidebar-text);text-decoration:none;font-size:13px;transition:.15s}
.nav-item:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-item.active{background:var(--accent);color:#fff;font-weight:500}
.progress{padding:16px 20px 24px}
.progress-label{font-size:11px;display:flex;justify-content:space-between;margin-bottom:6px;opacity:.6}
.progress-bar{height:4px;background:rgba(255,255,255,.1);border-radius:4px;overflow:hidden}
.progress-fill{height:100%;width:0;background:var(--green);border-radius:4px;transition:width .4s}

/* ===== Content ===== */
.content{margin-left:260px;flex:1;min-width:0}
.container{max-width:860px;margin:0 auto;padding:40px 48px 80px}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-radius:16px;padding:48px 40px;margin-bottom:40px}
.hero-tag{display:inline-block;background:rgba(255,255,255,.15);padding:4px 14px;border-radius:20px;font-size:12px;margin-bottom:16px}
.hero-title{font-size:2.4rem;font-weight:800;line-height:1.2;margin-bottom:12px}
.hero-sub{font-size:15px;opacity:.85;max-width:520px;line-height:1.6}
.hero-stats{display:flex;gap:32px;margin-top:28px;flex-wrap:wrap}
.stat{text-align:center}
.stat b{display:block;font-size:28px;font-weight:800}
.stat span{font-size:12px;opacity:.7}

/* ===== Headings ===== */
.chapter{padding-top:20px;margin-bottom:60px;scroll-margin-top:20px}
.chapter h1{font-size:1.6rem;font-weight:700;margin-bottom:24px;padding-bottom:12px;border-bottom:2px solid var(--border)}
.chapter h2{font-size:1.15rem;font-weight:600;margin:28px 0 12px;color:var(--accent2)}
.chapter h3{font-size:1rem;font-weight:600;margin:16px 0 8px}
.chapter p{margin:8px 0}

/* ===== Code ===== */
code{font-family:var(--mono);background:#f3ece4;padding:1px 6px;border-radius:4px;font-size:.9em;color:var(--accent2)}
pre{background:#1a1a2e;color:#e8e8f0;padding:14px 18px;border-radius:var(--radius);overflow-x:auto;font-family:var(--mono);font-size:13px;line-height:1.6;margin:12px 0}
pre code{background:none;padding:0;color:inherit}

/* ===== Tables ===== */
.tbl{width:100%;border-collapse:collapse;margin:12px 0 20px;font-size:14px}
.tbl th{background:var(--accent);color:#fff;padding:10px 14px;text-align:left;font-weight:500}
.tbl td{padding:9px 14px;border-bottom:1px solid var(--border);vertical-align:top}
.tbl tr:hover td{background:#f0f2ff}
.gist-tbl td:nth-child(2){font-style:italic;color:#444}
.gist-tbl tr.gist-week td{background:#f3eef6;color:var(--accent2);font-weight:700;
  font-size:13px;letter-spacing:.3px;padding:7px 14px;border-bottom:2px solid var(--accent)}
.gist-tbl tr.gist-week:hover td{background:#f3eef6}
.era-tbl td:last-child{font-weight:600;color:var(--accent2);font-size:13px}
.era-tbl .era-en{display:block;font-style:normal;font-weight:400;color:#888;font-size:12px;margin-top:2px}

/* ===== Callouts ===== */
.callout{border-radius:var(--radius);padding:16px 20px;margin:16px 0;font-size:14px;line-height:1.7}
.callout.tip{background:#e8f5e9;border-left:4px solid var(--green)}
.callout.warn{background:#fff3e0;border-left:4px solid var(--warm)}
.callout.important{background:#e8eaf6;border-left:4px solid var(--accent)}
.warn-text{color:var(--warm);font-size:14px}

/* 章节总结（流派与作者关系 / 写作特点） */
.chapter-summary{margin:14px 0 22px;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg2)}
.chapter-summary .cs-head{display:flex;align-items:center;gap:8px;padding:11px 18px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-family:var(--font);font-weight:700;font-size:14.5px}
.chapter-summary .cs-head .cs-ico{font-size:16px}
.chapter-summary .cs-body{padding:14px 18px 6px}
.chapter-summary .cs-intro{font-size:13.8px;line-height:1.75;color:var(--text);margin:0 0 12px}
.chapter-summary .cs-intro b{color:var(--accent)}
.chapter-summary .cs-author{padding:10px 0;border-top:1px dashed var(--border)}
.chapter-summary .cs-author:first-of-type{border-top:none}
.chapter-summary .cs-name{font-family:var(--serif);font-weight:700;color:var(--accent);font-size:14px;margin-right:8px}
.chapter-summary .cs-tie{display:inline-block;font-family:var(--font);font-size:11px;font-weight:700;
  padding:1px 8px;border-radius:999px;background:#fde2e0;color:var(--accent);vertical-align:middle}
.chapter-summary .cs-text{margin:5px 0 0;font-size:13.5px;line-height:1.7;color:var(--text)}
.chapter-summary .cs-text b{color:var(--accent2)}
.chapter-summary .cs-feat{display:flex;flex-wrap:wrap;gap:5px;margin:7px 0 0}
.chapter-summary .cs-feat .feat{background:#f4ece4;color:var(--text2);border:1px solid var(--border);
  border-radius:999px;padding:2px 9px;font-size:11.5px;font-family:var(--font)}
.chapter-summary .cs-contrast{margin:12px 0 6px;padding:10px 14px;background:#fff8f0;
  border-left:3px solid var(--warm);border-radius:6px;font-size:13px;line-height:1.7;color:var(--text)}
.chapter-summary .cs-contrast b{color:var(--warm)}
.source-tag{display:inline-block;margin-left:8px;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:700;vertical-align:middle}
.source-tag.non-courseware{background:#fff3e0;color:var(--warm);border:1px solid rgba(251,86,7,.2)}
.source-tag.deepseek{background:#e8eaf6;color:var(--accent);border:1px solid rgba(67,97,238,.2)}

/* ===== Knowledge Points ===== */
.kp-list{list-style:none;padding:0}
.kp-list li{position:relative;padding:6px 0 6px 20px;font-size:14px}
.kp-list li::before{content:"";position:absolute;left:0;top:14px;width:8px;height:8px;border-radius:50%;background:var(--accent);opacity:.5}

/* ===== Inline MCQ (内嵌选择题，作答后才显示答案) ===== */
.mcq{background:var(--bg2);border:1.5px solid var(--border);border-radius:var(--radius);margin:14px 0;box-shadow:var(--shadow);padding:16px 22px}
.mcq .mcq-head{display:flex;align-items:flex-start;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.mcq .mcq-stem{font-size:14.5px;font-weight:500;flex:1;min-width:0;line-height:1.7}
.mcq .mcq-mode-badge{display:inline-block;padding:3px 10px;border-radius:999px;background:#eef0fa;color:var(--accent2);font-size:11px;font-weight:700}
.mcq .mcq-opts{display:flex;flex-direction:column;gap:8px;margin:10px 0}
.mcq .mcq-opt{display:flex;gap:10px;padding:9px 14px;border:1.5px solid var(--border);border-radius:8px;cursor:pointer;font-size:14px;transition:.15s;align-items:flex-start;line-height:1.6}
.mcq .mcq-opt:hover{border-color:var(--accent);background:#f5f6ff}
.mcq .mcq-opt input{margin-top:5px;accent-color:var(--accent);flex-shrink:0}
.mcq .mcq-opt.selected{border-color:var(--accent);background:#eef2ff}
.mcq .mcq-opt.pending{box-shadow:inset 0 0 0 1px rgba(67,97,238,.15)}
.mcq .mcq-opt .opt-label{font-weight:600;color:var(--accent);margin-right:4px;flex-shrink:0}
.mcq.answered .mcq-opt{cursor:default;pointer-events:none}
.mcq .mcq-opt.correct{background:#e8f8f1;border-color:var(--green);font-weight:500}
.mcq .mcq-opt.correct .opt-label{color:var(--green)}
.mcq .mcq-opt.wrong{background:#fff0f0;border-color:var(--hot)}
.mcq .mcq-opt.wrong .opt-label{color:var(--hot)}
.mcq .mcq-opt.missed{background:#f0fdf4;border-color:var(--green)}
.mcq .mcq-explain{display:none;margin-top:12px;padding:12px 16px;background:#f0fdf4;border-left:3px solid var(--green);border-radius:6px;font-size:13.5px;line-height:1.75}
.mcq.answered .mcq-explain{display:block;animation:slideIn .25s ease}
.mcq .mcq-result-badge{display:none;padding:3px 12px;border-radius:12px;font-size:11px;font-weight:700;color:#fff;flex-shrink:0}
.mcq.answered.correct .mcq-result-badge{display:inline-block;background:var(--green)}
.mcq.answered.correct .mcq-result-badge::before{content:"✓ 正确"}
.mcq.answered.wrong .mcq-result-badge{display:inline-block;background:var(--hot)}
.mcq.answered.wrong .mcq-result-badge::before{content:"✗ 错误"}
.mcq.answered.revealed .mcq-result-badge{display:inline-block;background:var(--text2)}
.mcq.answered.revealed .mcq-result-badge::before{content:"已查看答案"}
.mcq .mcq-actions{margin-top:8px;display:flex;gap:8px}
.mcq .mcq-submit,
.mcq .mcq-reveal{padding:5px 14px;border:1.5px solid var(--accent);background:transparent;color:var(--accent);border-radius:6px;cursor:pointer;font-size:12px;font-weight:600;font-family:inherit;transition:.15s}
.mcq .mcq-submit{background:var(--accent);color:#fff}
.mcq .mcq-submit:hover{background:var(--accent2);border-color:var(--accent2)}
.mcq .mcq-reveal:hover{background:var(--accent);color:#fff}
.mcq.answered .mcq-reveal,.mcq.answered .mcq-submit{display:none}

@keyframes slideIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}

/* ===== Open-ended question (非选择题，点击展开看答案) ===== */
.openq{background:var(--bg2);border:1.5px solid var(--border);border-radius:var(--radius);margin:14px 0;box-shadow:var(--shadow);padding:16px 22px}
.openq .openq-head{display:flex;align-items:flex-start;gap:10px;margin-bottom:8px;flex-wrap:wrap}
.openq .openq-stem{font-size:14.5px;font-weight:500;flex:1;min-width:0;line-height:1.7}
.openq .openq-toggle{padding:5px 14px;border:1.5px solid var(--accent);background:transparent;color:var(--accent);border-radius:6px;cursor:pointer;font-size:12px;font-weight:600;font-family:inherit;transition:.15s;flex-shrink:0}
.openq .openq-toggle:hover{background:var(--accent);color:#fff}
.openq.shown .openq-toggle{background:var(--text2);border-color:var(--text2);color:#fff}
.openq .openq-answer{display:none;margin-top:12px;padding:14px 18px;background:#f0fdf4;border-left:3px solid var(--green);border-radius:6px;font-size:13.5px;line-height:1.75}
.openq.shown .openq-answer{display:block;animation:slideIn .25s ease}
.openq .openq-answer p{margin:0 0 9px}
.openq .openq-answer p:last-child{margin-bottom:0}
.openq .disc-hint{margin:0 0 11px;padding:8px 13px;background:#fff7ed;border-left:3px solid var(--warm);border-radius:5px;font-size:12.5px;line-height:1.7;color:var(--text2)}
.openq .disc-hint b{color:var(--warm)}
/* boxed 变体：题面/原文外露的大题（Analysis/范文） */
.openq.boxed{padding:18px 22px;border-left:4px solid var(--accent)}
.openq.boxed .openq-stem{font-size:15px;font-weight:600}
.openq.boxed .openq-excerpt{display:block;margin-top:8px;padding:10px 14px;background:#faf7f2;border-left:3px solid var(--warm);border-radius:5px;font-size:13px;font-weight:400;font-style:italic;color:var(--text2);line-height:1.7}
.openq .openq-hint{display:inline-block;margin-top:8px;font-size:12.5px;font-weight:400;color:var(--text2);opacity:.85}

/* ===== Quiz ===== */
.quiz{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);margin:14px 0;box-shadow:var(--shadow);overflow:hidden}
.quiz summary{padding:14px 20px;cursor:pointer;font-size:14px;font-weight:500;list-style:none;display:flex;align-items:center;gap:10px;transition:.15s}
.quiz summary::-webkit-details-marker{display:none}
.quiz summary::before{content:"▶";font-size:10px;color:var(--accent);transition:transform .2s;flex-shrink:0}
.quiz[open] summary::before{transform:rotate(90deg)}
.quiz summary:hover{background:#f5f6ff}
.q-tag{display:inline-block;background:var(--accent);color:#fff;font-size:11px;padding:2px 10px;border-radius:12px;font-weight:600;flex-shrink:0}
.q-tag.self{background:var(--warm)}
.answer{background:#f0fdf4;border-top:1px dashed var(--green);padding:14px 20px;font-size:13.5px;line-height:1.75}

/* ===== Weight Grid ===== */
.weight-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:16px 0}
.weight-card{background:var(--bg2);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);border-top:3px solid var(--border)}
.weight-card.hot{border-top-color:var(--hot)}
.weight-card.warm{border-top-color:var(--warm)}
.weight-pct{font-size:28px;font-weight:800;color:var(--accent)}
.weight-card h3{margin:6px 0 4px;font-size:15px}
.weight-card p{font-size:13px;color:var(--text2)}

/* ===== Roadmap ===== */
.roadmap{display:flex;flex-direction:column;gap:14px;margin:20px 0}
.road-step{display:flex;gap:16px;background:var(--bg2);padding:16px 20px;border-radius:var(--radius);box-shadow:var(--shadow);border-left:4px solid var(--accent)}
.road-num{width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.road-step h3{font-size:15px;margin-bottom:2px}
.road-step p{font-size:13px;color:var(--text2)}

/* ===== Self-Test (interactive quiz) ===== */
.test-header{display:flex;justify-content:space-between;align-items:center;background:linear-gradient(135deg,var(--green),#0aa67c);color:#fff;border-radius:var(--radius);padding:18px 24px;margin:16px 0;flex-wrap:wrap;gap:16px}
.test-header h3{margin:0;font-size:16px;color:#fff}
.test-header .score{font-size:24px;font-weight:800}
.test-header .score small{font-size:12px;font-weight:400;opacity:.85}
.test-controls{display:flex;gap:8px;flex-wrap:wrap}
.btn{padding:7px 16px;border-radius:6px;border:0;cursor:pointer;font-size:13px;font-weight:600;transition:.15s;font-family:inherit}
.btn-primary{background:#fff;color:var(--accent2)}
.btn-primary:hover{background:#f0f0ff}
.btn-ghost{background:rgba(255,255,255,.18);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.28)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent2)}

.test-q{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;margin:14px 0;box-shadow:var(--shadow)}
.test-q .q-num{font-size:11px;color:var(--accent);font-weight:700;letter-spacing:1px}
.test-q .q-stem{font-size:14.5px;margin:6px 0 12px;font-weight:500}
.test-q .q-mode{display:inline-block;margin-left:8px;padding:2px 8px;border-radius:999px;background:#eef0fa;color:var(--accent2);font-size:11px;font-weight:700;vertical-align:middle}
.test-q .opts{display:flex;flex-direction:column;gap:8px}
.test-q .opt{display:flex;gap:10px;padding:9px 14px;border:1.5px solid var(--border);border-radius:8px;cursor:pointer;font-size:14px;transition:.15s;align-items:flex-start}
.test-q .opt:hover{border-color:var(--accent);background:#f5f6ff}
.test-q .opt input{margin-top:4px;accent-color:var(--accent)}
.test-q .opt.selected{border-color:var(--accent);background:#eef2ff}
.test-q .opt.pending{box-shadow:inset 0 0 0 1px rgba(67,97,238,.15)}
.test-q .opt.correct{background:#e8f8f1;border-color:var(--green)}
.test-q .opt.wrong{background:#fff0f0;border-color:var(--hot)}
.test-q .opt.missed{background:#f0fdf4;border-color:var(--green)}
.test-q .opt.disabled{cursor:default;pointer-events:none}
.test-q .test-actions{margin-top:12px;display:flex;justify-content:flex-end}
.test-q .explain{display:none;margin-top:12px;padding:10px 14px;background:#f0fdf4;border-left:3px solid var(--green);border-radius:6px;font-size:13.5px;line-height:1.7}
.test-q.answered .explain{display:block}
.test-q .badge-right{display:inline-block;padding:2px 8px;background:var(--green);color:#fff;border-radius:10px;font-size:11px;font-weight:700;margin-left:6px}
.test-q .badge-wrong{display:inline-block;padding:2px 8px;background:var(--hot);color:#fff;border-radius:10px;font-size:11px;font-weight:700;margin-left:6px}
.test-q .badge-reveal{display:inline-block;padding:2px 8px;background:var(--accent);color:#fff;border-radius:10px;font-size:11px;font-weight:700;margin-left:6px}
.test-q.answered .btn-submit{display:none}

/* ===== Responsive ===== */
@media(max-width:900px){
  .sidebar{width:220px}
  .content{margin-left:220px}
  .container{padding:24px 20px 60px}
  .weight-grid{grid-template-columns:1fr}
  .hero-title{font-size:1.6rem}
}
@media(max-width:640px){
  .sidebar{display:none}
  .content{margin-left:0}
}

/* ===================================================================
   英语散文选读专用组件
   =================================================================== */

/* 作者快速筛选 / 跳转框 */
.author-filter{position:relative;margin:0 0 24px;background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 18px}
.af-label{display:block;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;
  color:var(--text2);margin-bottom:8px}
.af-input{width:100%;font-family:var(--font);font-size:14px;color:var(--text);background:var(--bg);
  border:1px solid var(--border);border-radius:8px;padding:10px 14px;transition:.15s}
.af-input::placeholder{color:var(--text2);opacity:.7}
.af-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(157,41,51,.12)}
.af-results{position:absolute;left:18px;right:18px;top:calc(100% - 6px);z-index:50;
  background:var(--bg2);border:1px solid var(--border);border-radius:10px;
  box-shadow:0 8px 28px rgba(60,40,20,.18);max-height:340px;overflow-y:auto;padding:6px}
.af-item{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 12px;border-radius:7px;cursor:pointer;transition:background .12s}
.af-item:hover,.af-item.active{background:#f3ece4}
.af-name{font-family:var(--serif);font-size:14.5px;font-weight:600;color:var(--text)}
.af-tag{flex:none;font-size:11px;font-weight:600;color:var(--text2);background:var(--bg);
  border:1px solid var(--border);padding:2px 9px;border-radius:999px;white-space:nowrap}
.af-item:hover .af-tag,.af-item.active .af-tag{color:var(--accent2);border-color:rgba(157,41,51,.25)}
.af-empty{padding:12px;text-align:center;font-size:13px;color:var(--text2)}

@keyframes af-flash-ring{
  0%{box-shadow:0 0 0 0 rgba(157,41,51,.55),var(--shadow)}
  35%{box-shadow:0 0 0 5px rgba(157,41,51,.35),0 6px 22px rgba(157,41,51,.25)}
  100%{box-shadow:0 0 0 0 rgba(157,41,51,0),var(--shadow)}
}
.author-card.af-flash{animation:af-flash-ring 1.6s ease-out;outline:2px solid var(--accent);
  outline-offset:2px;border-radius:var(--radius)}

@media(max-width:640px){
  .af-results{left:10px;right:10px}
  .af-item{flex-wrap:wrap;gap:4px}
}

/* 重点作者卡片 */
.author-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:0;margin:18px 0;overflow:hidden}
.author-card .ac-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;padding:14px 20px}
.author-card .ac-name{font-size:17px;font-weight:700;font-family:var(--serif)}
.author-card .ac-life{font-size:12px;opacity:.85}
.author-card .ac-flag{margin-left:auto;background:rgba(255,255,255,.18);padding:2px 10px;
  border-radius:999px;font-size:11px;font-weight:600}
.author-card .ac-body{padding:16px 20px}
.author-card .ac-row{margin:6px 0;font-size:14px}
.author-card .ac-row b{color:var(--accent2)}
.work-pill{display:inline-block;background:#f3ece4;color:var(--accent2);border:1px solid var(--border);
  padding:2px 10px;border-radius:6px;font-size:12.5px;margin:2px 4px 2px 0;font-style:italic}
.must-know{display:inline-block;background:var(--hot);color:#fff;font-size:10px;font-weight:700;
  padding:2px 8px;border-radius:999px;letter-spacing:.5px;vertical-align:middle;margin-left:6px}

/* 选文原文引用块 */
.excerpt{font-family:var(--serif);background:#fbf6ef;border-left:4px solid var(--warm);
  border-radius:0 8px 8px 0;padding:14px 20px;margin:12px 0;font-size:14.5px;line-height:1.8;color:#3a2f28}
.excerpt .src{display:block;text-align:right;font-style:italic;font-size:12.5px;color:var(--text2);
  margin-top:8px;font-family:var(--font)}
.excerpt em,.excerpt i{color:var(--accent2)}

/* 原文全文（可折叠组件 .article） */
.article{margin:12px 0;border:1.5px solid var(--border);border-radius:10px;background:var(--bg2);box-shadow:var(--shadow)}
.article-toggle{width:100%;display:flex;align-items:center;gap:10px;padding:11px 18px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;border-radius:9px 9px 0 0;cursor:pointer;font-family:inherit;font-size:13.5px;font-weight:600;text-align:left;transition:filter .15s}
.article:not(.shown) .article-toggle{border-radius:9px}
.article-toggle:hover{filter:brightness(1.08)}
.article-toggle .art-ico{font-size:15px;line-height:1}
.article-toggle .art-title{flex:1;min-width:0}
.article-toggle .art-meta{font-size:11.5px;font-weight:400;opacity:.85}
.article-toggle .art-caret{transition:transform .25s;flex-shrink:0}
.article.shown .article-toggle .art-caret{transform:rotate(90deg)}
.article-body{display:none;padding:18px 22px;font-family:var(--serif);font-size:14.5px;line-height:1.95;color:#3a2f28;background:#fdfaf5}
.article.shown .article-body{display:block;border-radius:0 0 9px 9px;animation:slideIn .3s ease}
.article-body p{margin:0 0 4px}
.article-body p:last-child{margin-bottom:0}
.article-body .art-zh{margin:0 0 14px;padding:8px 14px;background:#f5f3fb;border-left:3px solid #8b7bb8;border-radius:5px;font-family:var(--font);font-size:13px;line-height:1.85;color:#4a4258}
/* 句子级中英联动高亮：悬停一侧句子，双向高亮对应句 */
.article-body p[data-aligned] .sent,
.article-body .art-zh[data-aligned] .sent{cursor:pointer;transition:background .12s,box-shadow .12s}
.article-body .sent-hi{background:#fff3b0;box-shadow:0 0 0 1px rgba(212,160,23,.35);border-radius:3px}
.article-body .art-zh .sent-hi{background:#ffe9a8}
.article-body .art-zh::before{content:"译";display:inline-block;margin-right:7px;padding:0 5px;font-size:10.5px;font-weight:700;color:#fff;background:#8b7bb8;border-radius:3px;vertical-align:1px}
.article-body .para-label{display:block;font-family:var(--font);font-size:11.5px;font-weight:700;color:var(--accent);letter-spacing:.5px;margin:16px 0 4px;text-transform:uppercase}
.article-body .para-label:first-child{margin-top:0}
.article-body mark{background:#fbe9c8;color:#5a3e12;padding:1px 3px;border-radius:3px;box-shadow:inset 0 -2px 0 rgba(188,108,37,.35)}
.article-body .art-src{display:block;text-align:right;font-style:italic;font-size:12.5px;color:var(--text2);margin-top:10px;font-family:var(--font)}
.article-body .art-gloss{margin-top:12px;padding:10px 14px;background:#f0f5f0;border-left:3px solid var(--green);border-radius:5px;font-family:var(--font);font-size:12.5px;line-height:1.7;color:var(--text2)}
.article-body .art-gloss b{color:var(--green)}

/* 原文顶部「文章主旨 + 写作特点 + 考点」概览块 */
.article-body .art-brief{margin:0 0 16px;border:1px solid #e3dcef;border-radius:8px;overflow:hidden;background:#faf8fd;font-family:var(--font)}
.article-body .art-brief .ab-head{display:flex;align-items:center;gap:7px;padding:8px 14px;background:linear-gradient(135deg,#8b7bb8,#6e5fa0);color:#fff;font-size:12.5px;font-weight:700;letter-spacing:.3px}
.article-body .art-brief .ab-head .ab-ico{font-size:13px}
.article-body .art-brief .ab-row{display:flex;gap:10px;padding:9px 14px;font-size:13px;line-height:1.75;color:#3a2f28;border-top:1px solid #ece6f5}
.article-body .art-brief .ab-row:first-of-type{border-top:none}
.article-body .art-brief .ab-key{flex:0 0 64px;font-weight:700;color:#6e5fa0;font-size:12px;padding-top:1px}
.article-body .art-brief .ab-val{flex:1;min-width:0}
.article-body .art-brief .ab-val b{color:var(--accent)}
.article-body .art-brief .ab-val i{color:var(--accent2);font-family:var(--serif)}
.article-body .art-brief .ab-feat{display:inline-block;margin:1px 5px 1px 0;padding:1px 9px;border-radius:999px;background:#efe9f8;color:#5a4d82;border:1px solid #ded3f0;font-size:11.5px;font-weight:600}
.article-body .art-brief .ab-row.ab-exam{background:#fdf3f0}
.article-body .art-brief .ab-row.ab-exam .ab-key{color:var(--hot)}

/* 课件原文标注：hl=加红重点(一级), bk=加粗次级 */
.article-body .hl{position:relative;background:#fde2e0;color:#9d2933;font-weight:600;
  padding:1px 3px;border-radius:3px;box-shadow:inset 0 -2px 0 rgba(157,41,51,.3);cursor:help;
  border-bottom:1px dotted rgba(157,41,51,.5)}
.article-body .bk{position:relative;font-weight:700;color:#4a342a;cursor:help;border-bottom:1px dotted rgba(74,52,42,.35)}
/* tooltip：注释翻译 */
.article-body .hl[data-note]:hover::after,
.article-body .bk[data-note]:hover::after{
  content:attr(data-note);position:absolute;left:50%;bottom:calc(100% + 8px);transform:translateX(-50%);
  background:#3a2f28;color:#fdf6e9;font-family:var(--font);font-size:12.5px;font-weight:500;line-height:1.5;
  white-space:normal;width:max-content;max-width:260px;padding:7px 11px;border-radius:7px;
  box-shadow:0 6px 20px rgba(0,0,0,.25);z-index:30;pointer-events:none;text-align:left}
.article-body .hl[data-note]:hover::before,
.article-body .bk[data-note]:hover::before{
  content:"";position:absolute;left:50%;bottom:calc(100% + 2px);transform:translateX(-50%);
  border:6px solid transparent;border-top-color:#3a2f28;z-index:30;pointer-events:none}
/* 生词悬停释义：gw=gloss word（蓝色虚线下划线，区别于红色重点 hl） */
.article-body .gw{position:relative;cursor:help;border-bottom:1px dashed rgba(46,93,120,.55);
  background:rgba(46,93,120,.06);border-radius:2px;padding:0 1px}
.article-body .gw:hover{background:rgba(46,93,120,.14)}
.article-body .gw[data-note]:hover::after{
  content:attr(data-note);position:absolute;left:50%;bottom:calc(100% + 8px);transform:translateX(-50%);
  background:#1f3a4a;color:#eef6fb;font-family:var(--font);font-size:12.5px;font-weight:500;line-height:1.5;
  white-space:normal;width:max-content;max-width:280px;padding:7px 11px;border-radius:7px;
  box-shadow:0 6px 20px rgba(0,0,0,.25);z-index:31;pointer-events:none;text-align:left}
.article-body .gw[data-note]:hover::before{
  content:"";position:absolute;left:50%;bottom:calc(100% + 2px);transform:translateX(-50%);
  border:6px solid transparent;border-top-color:#1f3a4a;z-index:31;pointer-events:none}
/* 章末重点词语汇总表 */
.vocab{margin:14px 0 4px;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#fff}
.vocab-head{display:flex;align-items:center;gap:8px;padding:10px 16px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-family:var(--font);font-weight:700;font-size:14px}
.vocab-head .vocab-ico{font-size:16px}
.vocab table{width:100%;border-collapse:collapse;font-size:13.5px;table-layout:fixed}
.vocab col.c-term{width:42%}
.vocab th{background:#f7ede6;color:var(--accent);text-align:left;padding:8px 14px;font-family:var(--font);font-weight:700;border-bottom:1px solid var(--border)}
.vocab td{padding:8px 14px;border-bottom:1px solid #f0e6dd;vertical-align:top;line-height:1.65;word-break:break-word;overflow-wrap:anywhere}
.vocab tr:last-child td{border-bottom:none}
.vocab tr:nth-child(even) td{background:#fcf8f3}
.vocab .v-term{font-family:var(--serif);font-weight:600;color:#9d2933}
.vocab .v-term.sec{color:#4a342a}
.vocab .v-cn{color:var(--text)}
.vocab .v-note{color:var(--text2);font-size:12.5px}
.vocab .v-tag{display:inline-block;font-family:var(--font);font-size:10px;font-weight:700;padding:1px 6px;border-radius:8px;margin-right:6px;vertical-align:middle}
.vocab .v-tag.key{background:#fde2e0;color:#9d2933}
.vocab .v-tag.sec{background:#efe7df;color:#6b5544}

/* 讨论题组 */
.disc-block{margin:12px 0 4px;padding:12px 14px 4px;background:#fbf6ef;border:1px solid var(--border);border-radius:10px}
.disc-block .disc-title{font-family:var(--font);font-size:13px;font-weight:700;color:var(--accent);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.disc-block .openq{margin:0 0 8px;background:#fff}
.disc-block .openq:last-child{margin-bottom:6px}
.disc-block .openq-head{align-items:flex-start}
.disc-block .disc-num{flex:0 0 auto;width:20px;height:20px;line-height:20px;text-align:center;border-radius:50%;
  background:var(--accent);color:#fff;font-family:var(--font);font-size:11.5px;font-weight:700;margin-right:9px;margin-top:1px}

/* 金句 */
.quote-key{font-family:var(--serif);font-size:15px;font-weight:600;color:var(--accent2);
  background:#f9eee8;border:1px dashed var(--accent);border-radius:8px;padding:10px 16px;margin:10px 0;line-height:1.7}

/* 返回顶部按钮 */
.back-to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border:none;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-size:20px;font-weight:700;
  cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,.22);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s,transform .25s,visibility .25s;z-index:50}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{filter:brightness(1.08);box-shadow:0 8px 22px rgba(0,0,0,.28)}
@media(max-width:640px){.back-to-top{right:14px;bottom:14px;width:40px;height:40px;font-size:18px}}

/* 术语/分析词速查网格（速查表用） */
.term-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:6px 18px;margin:10px 0;font-size:13.5px}
.term-grid span{padding:5px 0;border-bottom:1px dotted var(--border);line-height:1.6}
.term-grid span b{color:var(--accent2);font-family:var(--serif)}

/* 风格分析关键词标签 */
.style-tags{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.style-tags .tag{background:#eef3ed;color:var(--green);border:1px solid #cfe0d0;
  padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600}

/* 答题模板/技巧框 */
.skill-box{background:#fff;border:1.5px solid var(--accent);border-radius:var(--radius);
  padding:16px 20px;margin:16px 0;box-shadow:var(--shadow)}
.skill-box h4{color:var(--accent);font-size:14px;margin:0 0 8px;display:flex;align-items:center;gap:8px}
.skill-box h4::before{content:"✎";font-size:16px}
.phrase-list{list-style:none;padding:0;margin:8px 0}
.phrase-list li{padding:5px 0 5px 22px;position:relative;font-size:13.5px;line-height:1.6}
.phrase-list li::before{content:"▸";position:absolute;left:4px;color:var(--accent)}
.phrase-list .en{font-family:var(--serif);color:var(--accent2);font-style:italic}

/* 题型权重网格补色 */
.weight-card.cool{border-top-color:var(--green)}
.weight-card.purple{border-top-color:var(--accent2)}

/* 英文范文（model answer） */
.model-answer{font-family:var(--font);background:#f0fdf4;border-left:3px solid var(--green);
  border-radius:0 6px 6px 0;padding:12px 16px;margin:10px 0;font-size:13.5px;line-height:1.75}
.model-answer .label{font-size:11px;font-weight:700;color:var(--green);text-transform:uppercase;letter-spacing:1px;display:block;margin-bottom:4px}

/* 视图切换标签 */
.view-tabs{display:flex;gap:8px;margin:0 0 24px;flex-wrap:wrap}
.view-tab{padding:8px 20px;border:1.5px solid var(--border);background:var(--bg2);color:var(--text2);
  border-radius:999px;cursor:pointer;font-size:14px;font-weight:600;font-family:inherit;transition:.15s}
.view-tab:hover{border-color:var(--accent)}
.view-tab.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* 时间线 / 流派演进 */
.timeline{position:relative;margin:20px 0;padding-left:28px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--border)}
.tl-item{position:relative;margin-bottom:16px}
.tl-item::before{content:"";position:absolute;left:-24px;top:5px;width:12px;height:12px;border-radius:50%;
  background:var(--accent);border:2px solid var(--bg)}
.tl-item h4{font-size:14.5px;margin:0 0 2px;color:var(--accent2)}
.tl-item p{font-size:13px;color:var(--text2);margin:0}

/* 文章标题用衬线体 */
.chapter h1,.hero-title{font-family:var(--serif)}