:root{--bg:#fafaf8;--text:#1a1a1a;--text-secondary:#5c5548;--accent:#8b6914;--accent-bg:#8b691414;--link:#1a4a6b;--border:#e8e4dc;--card-bg:#fff;--fact-bg:#edf4ed;--fact-text:#3a5c3a;--opinion-bg:#faf3e0;--opinion-text:#6b5518;--region-accent:#5a3d2b;--sans:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--serif:Georgia, "Songti SC", "Noto Serif CJK SC", serif;font:18px/1.75 var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}*,:before,:after{box-sizing:border-box}body{margin:0;padding:0}a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{font-family:var(--serif);color:var(--region-accent);margin:0}.app{max-width:720px;margin:0 auto;padding:0 28px 120px}.header{border-bottom:1px solid var(--border);margin-bottom:64px;padding:80px 0 56px}.header h1{letter-spacing:-.3px;margin:0 0 20px;font-size:28px;line-height:1.4}.header .overview{color:var(--text-secondary);max-width:640px;margin:0;font-size:16px;line-height:1.85}.header .meta{color:var(--text-secondary);opacity:.7;margin-top:16px;font-size:13px}.nav{background:var(--bg);border-bottom:1px solid var(--border);z-index:10;white-space:nowrap;-webkit-overflow-scrolling:touch;margin-bottom:48px;padding:10px 0;position:sticky;top:0;overflow-x:auto}.nav-inner{gap:4px;max-width:720px;margin:0 auto;padding:0 24px;display:flex}.nav a{color:var(--text-secondary);border-radius:4px;flex-shrink:0;padding:4px 12px;font-size:14px;text-decoration:none;transition:background .15s;display:inline-block}.nav a:hover{background:var(--border);text-decoration:none}.nav a.nav-tension{color:var(--accent)}.nav a.nav-active{background:var(--accent-bg);color:var(--accent);font-weight:600}.region{margin-bottom:72px;scroll-margin-top:60px}.region-header{cursor:pointer;-webkit-user-select:none;user-select:none;background:var(--card-bg);border:1px solid var(--border);border-radius:8px;padding:24px 28px;transition:box-shadow .2s,border-color .2s}.region-header:hover{border-color:#d0cbc0;box-shadow:0 2px 8px #0000000f}.region-title-row{justify-content:space-between;align-items:center;display:flex}.expand-icon{color:var(--accent);background:var(--accent-bg);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:20px;font-weight:300;transition:transform .2s;display:flex}.expand-icon.expanded{background:var(--accent-bg)}.region-title{color:var(--region-accent);margin:0;font-size:20px;font-weight:600;line-height:1.4}.region-thesis{color:var(--text-secondary);border-left:2px solid var(--accent);margin:14px 0 0;padding-left:16px;font-size:15px;line-height:1.85}.region-preview{border-top:1px dashed var(--border);margin-top:12px;padding-top:12px}.region-preview .intuition{margin-bottom:4px}.more-hint{color:var(--accent);opacity:.7;margin:6px 0 0;font-size:13px}.region-body{margin-top:20px;animation:.3s ease-out fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.intuitions{margin:0 0 20px;padding:0;list-style:none}.intuition{background:var(--card-bg);border:1px solid var(--border);border-radius:6px;margin-bottom:12px;padding:18px 22px;font-size:15px;line-height:1.8;position:relative}.intuition .badge{vertical-align:middle;letter-spacing:.3px;border-radius:3px;margin-right:8px;padding:1px 7px;font-size:11px;font-weight:600;display:inline-block}.badge-fact{background:var(--fact-bg);color:var(--fact-text)}.badge-opinion{background:var(--opinion-bg);color:var(--opinion-text)}.intuition .source-ref{color:var(--text-secondary);opacity:.65;margin-top:6px;font-size:12px;display:block}.pros-cons{grid-template-columns:1fr 1fr;gap:20px;margin-bottom:32px;display:grid}.pros,.cons{border-radius:6px;padding:20px;font-size:14px;line-height:1.75}.pros{background:#f4f8f2;border:1px solid #dce8d6}.cons{background:#faf5f5;border:1px solid #ead8d6}.pros h4,.cons h4{font-family:var(--sans);text-transform:uppercase;letter-spacing:.5px;margin:0 0 8px;font-size:13px;font-weight:600}.pros h4{color:#3a5c3a}.cons h4{color:#8b3a3a}.pros ul,.cons ul{margin:0;padding-left:18px}.pros li,.cons li{margin-bottom:4px}.articles{margin-top:16px}.articles h4{font-family:var(--sans);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin:0 0 10px;font-size:13px;font-weight:600}.article-ref{border-bottom:1px solid var(--border);align-items:baseline;gap:8px;padding:8px 0;font-size:14px;line-height:1.5;display:flex}.article-ref:last-child{border-bottom:none}.article-ref .tier{white-space:nowrap;background:var(--border);color:var(--text-secondary);border-radius:3px;flex-shrink:0;padding:1px 6px;font-size:11px;font-weight:600}.article-ref .tier-primary{background:var(--accent-bg);color:var(--accent)}.article-ref 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.side{margin-bottom:6px;font-size:14px;font-weight:600}.reading-path{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;margin:80px 0;padding:36px 32px}.reading-path h2{margin-bottom:20px;font-size:18px}.reading-path .path-group{margin-bottom:20px}.reading-path .path-group:last-child{margin-bottom:0}.reading-path .path-label{color:var(--text-secondary);margin-bottom:8px;font-size:14px;font-weight:600}.reading-path .path-intuition{border-bottom:1px solid var(--border);padding:6px 0;font-size:14px;line-height:1.6}.reading-path .path-intuition:last-child{border-bottom:none}.reading-path .path-intuition .path-badge{background:var(--border);color:var(--text-secondary);border-radius:3px;margin-right:6px;padding:1px 5px;font-size:10px}.footer{border-top:1px solid var(--border);color:var(--text-secondary);text-align:center;opacity:.6;margin-top:80px;padding-top:24px;font-size:13px}.footer a{color:var(--text-secondary)}.back-to-top{background:var(--card-bg);border:1px solid var(--border);width:40px;height:40px;color:var(--text-secondary);cursor:pointer;z-index:100;border-radius:50%;justify-content:center;align-items:center;font-size:18px;transition:box-shadow .2s,transform .2s;display:flex;position:fixed;bottom:28px;right:28px;box-shadow:0 2px 8px #00000014}.back-to-top:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001f}@media (width<=640px){.app{padding:0 16px 60px}.header{padding:40px 0 28px}.header h1{font-size:22px}.pros-cons,.tension .positions{grid-template-columns:1fr}.nav-inner{padding:0 16px}.region-header{padding:14px 16px}.region-title{font-size:18px}.back-to-top{width:36px;height:36px;bottom:16px;right:16px}}