:root{--paper: #f6f2e9;--paper-deep: #ece5d7;--paper-card: #fcfaf5;--ink: #20201e;--ink-light: #3d3b36;--muted: #6f6a60;--muted-light: #9a9488;--line: #cfc6b6;--line-light: #e4ddcf;--accent: #d84f2a;--accent-dark: #a9371b;--accent-soft: rgba(216, 79, 42, .08);--note: #efe198;--note-border: #dfce72;--white: #fffdf8;--blue-soft: #eaf1f8;--blue-ink: #2b5680;--green-soft: #edf5ed;--green-ink: #2b6a38;--shadow-sm: 0 2px 4px rgba(32, 32, 30, .04);--shadow-md: 0 6px 16px rgba(32, 32, 30, .07);--shadow-lift: 0 10px 24px rgba(32, 32, 30, .09);--serif: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;--sans: "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;--mono: "Fira Code", "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;--radius-sm: 4px;--radius: 8px;--radius-lg: 14px;--container-max: 1200px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--sans);line-height:1.8;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::selection{color:var(--white);background:var(--accent)}a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease}.paper-grain{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;opacity:.4;pointer-events:none;background-image:radial-gradient(circle at 20% 30%,rgba(80,65,45,.07) 0 .7px,transparent .8px),radial-gradient(circle at 75% 60%,rgba(80,65,45,.05) 0 .6px,transparent .7px);background-size:7px 7px,11px 11px}.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 24px}.site-header{display:flex;justify-content:space-between;align-items:center;max-width:var(--container-max);margin:0 auto;padding:24px 24px 16px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:14px;text-decoration:none}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--radius-sm);background:var(--ink);color:var(--paper);font-family:var(--serif);font-weight:700;font-size:20px;letter-spacing:-.5px;box-shadow:inset 0 0 0 1px #ffffff26}.brand-text{display:flex;flex-direction:column}.brand-text strong{font-family:var(--serif);font-size:1.15rem;font-weight:700;color:var(--ink);line-height:1.2}.brand-text small{font-size:.72rem;font-weight:600;letter-spacing:1.5px;color:var(--muted);text-transform:uppercase;margin-top:2px}.site-nav{display:flex;align-items:center;gap:24px}.site-nav a{font-size:.95rem;font-weight:500;color:var(--muted);position:relative;padding:4px 0}.site-nav a:hover,.site-nav a.active{color:var(--ink)}.site-nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent)}.nav-search-btn{display:flex;align-items:center;gap:8px;background:var(--paper-deep);border:1px solid var(--line);color:var(--muted);padding:6px 14px;border-radius:var(--radius);font-size:.88rem;cursor:pointer;transition:all .2s ease}.nav-search-btn:hover{background:var(--white);border-color:var(--accent);color:var(--ink)}.nav-search-btn kbd{background:var(--paper);border:1px solid var(--line);border-radius:3px;padding:1px 5px;font-family:var(--mono);font-size:.75rem}.hero{display:grid;grid-template-columns:1fr 280px;gap:40px;align-items:start;max-width:var(--container-max);margin:0 auto;padding:56px 24px 48px}.eyebrow{font-family:var(--mono);font-size:.8rem;font-weight:600;letter-spacing:2px;color:var(--accent);text-transform:uppercase;margin:0 0 12px;display:flex;align-items:center;gap:8px}.eyebrow:before{content:"";display:inline-block;width:8px;height:8px;background:var(--accent);border-radius:50%}.hero h1{font-family:var(--serif);font-size:3rem;line-height:1.18;font-weight:800;color:var(--ink);margin:0 0 20px;letter-spacing:-.5px}.hero h1 em{font-style:normal;color:var(--accent);position:relative;display:inline-block}.hero h1 em:after{content:"";position:absolute;left:0;right:0;bottom:2px;height:8px;background:var(--note);z-index:-1;transform:rotate(-1deg);opacity:.85}.hero-intro{font-size:1.15rem;color:var(--muted);line-height:1.8;max-width:680px;margin:0 0 32px}.hero-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.primary-link{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:var(--white);padding:12px 24px;border-radius:var(--radius);font-weight:600;font-size:1rem;box-shadow:var(--shadow-sm);transition:all .2s 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var(--line-light);padding-top:14px;margin-top:auto;font-size:.85rem;color:var(--muted)}.post-card-footer .read-btn{display:inline-flex;align-items:center;gap:4px;font-weight:600;color:var(--accent)}.post-card:hover .read-btn{color:var(--accent-dark)}.roadmap-section{background:var(--paper-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;margin-bottom:64px}.roadmap-flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative}.roadmap-step{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:18px 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var(--accent-soft)}.sidebar-group{margin-bottom:24px}.sidebar-group-title{font-family:var(--mono);font-size:.75rem;font-weight:700;color:var(--muted);letter-spacing:1px;text-transform:uppercase;margin-bottom:8px;padding-left:8px}.sidebar-link{display:block;padding:6px 12px;border-radius:var(--radius-sm);font-size:.9rem;color:var(--ink-light);line-height:1.4;margin-bottom:2px}.sidebar-link:hover{background:var(--paper-deep);color:var(--ink)}.sidebar-link.active{background:var(--white);border-left:3px solid var(--accent);font-weight:600;color:var(--accent);box-shadow:var(--shadow-sm)}.reader-main{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:48px 52px;box-shadow:var(--shadow-sm);min-width:0}.doc-breadcrumb{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--muted);margin-bottom:16px}.doc-header h1{font-family:var(--serif);font-size:2.4rem;font-weight:800;color:var(--ink);line-height:1.25;margin:0 0 16px;border-bottom:2px solid var(--paper-deep);padding-bottom:16px}.doc-meta{display:flex;gap:18px;font-size:.85rem;color:var(--muted);margin-bottom:32px}.doc-body{font-size:1.05rem;line-height:1.9;color:var(--ink)}.doc-body h2{font-family:var(--serif);font-size:1.65rem;font-weight:800;color:var(--ink);margin:40px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--line-light)}.doc-body h3{font-family:var(--serif);font-size:1.3rem;font-weight:700;color:var(--ink);margin:28px 0 12px}.doc-body p{margin:0 0 18px}.doc-body ul,.doc-body ol{padding-left:24px;margin:0 0 20px}.doc-body li{margin-bottom:8px}.doc-body code{font-family:var(--mono);font-size:.88em;background:var(--paper-deep);color:var(--accent-dark);padding:2px 6px;border-radius:4px;border:1px solid var(--line)}.doc-body pre{background:#1e1e1e;color:#f8f8f2;padding:18px 20px;border-radius:var(--radius);overflow-x:auto;font-family:var(--mono);font-size:.88rem;line-height:1.6;margin:20px 0;position:relative}.doc-body pre 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var(--line)}.outline-title{font-family:var(--mono);font-size:.75rem;font-weight:700;color:var(--muted);letter-spacing:1px;text-transform:uppercase;margin-bottom:12px}.outline-list{list-style:none;padding:0;margin:0}.outline-item{margin-bottom:8px}.outline-link{font-size:.85rem;color:var(--muted);display:block;line-height:1.4}.outline-link:hover,.outline-link.active{color:var(--accent);font-weight:600}.glossary-controls{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-bottom:32px}.glossary-search-input{flex-grow:1;min-width:280px;background:var(--white);border:1px solid var(--line);padding:12px 18px;border-radius:var(--radius);font-size:1rem;color:var(--ink);outline:none}.glossary-search-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.glossary-filters{display:flex;gap:8px;flex-wrap:wrap}.filter-btn{background:var(--white);border:1px solid var(--line);color:var(--muted);padding:8px 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6px;border-radius:var(--radius-sm)}.term-en{font-size:.82rem;color:var(--muted);margin-bottom:10px}.term-desc{font-size:.9rem;color:var(--ink-light);line-height:1.6;margin:0}.search-modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#20201e99;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;display:flex;justify-content:center;align-items:flex-start;padding-top:100px;opacity:0;pointer-events:none;transition:opacity .2s ease}.search-modal-backdrop.open{opacity:1;pointer-events:auto}.search-modal-box{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);width:100%;max-width:640px;box-shadow:var(--shadow-lift);overflow:hidden;display:flex;flex-direction:column;max-height:70vh}.search-input-wrapper{display:flex;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line);gap:12px}.search-input-wrapper input{flex-grow:1;border:none;font-size:1.1rem;outline:none;font-family:var(--sans);color:var(--ink);background:transparent}.search-results-list{overflow-y:auto;padding:12px}.search-result-item{display:block;padding:12px 16px;border-radius:var(--radius);transition:background .15s ease}.search-result-item:hover,.search-result-item.selected{background:var(--paper-deep)}.search-result-title{font-family:var(--serif);font-weight:700;font-size:1rem;color:var(--ink);margin-bottom:4px}.search-result-snippet{font-size:.85rem;color:var(--muted);line-height:1.5}.site-footer{border-top:1px solid var(--line);background:var(--paper-deep);padding:48px 24px 36px;margin-top:64px}.footer-content{max-width:var(--container-max);margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px}.footer-brand{font-family:var(--serif);font-size:1.05rem;font-weight:700;color:var(--ink)}.footer-links{display:flex;gap:20px;font-size:.9rem;color:var(--muted)}.footer-links a:hover{color:var(--accent)}.footer-copy{width:100%;text-align:center;font-size:.8rem;color:var(--muted-light);border-top:1px dashed var(--line);padding-top:20px;margin-top:24px}@media (max-width: 1024px){.hero{grid-template-columns:1fr}.hero-note{max-width:320px}.reader-wrapper{grid-template-columns:240px 1fr}.reader-outline{display:none}.stats-grid,.roadmap-flow{grid-template-columns:repeat(2,1fr)}}@media (max-width: 768px){.site-header{flex-direction:column;gap:16px;align-items:flex-start}.site-nav{width:100%;overflow-x:auto;padding-bottom:6px}.hero h1{font-size:2.2rem}.reader-wrapper{grid-template-columns:1fr}.reader-sidebar{display:none}.reader-main{padding:24px 20px}.stats-grid,.roadmap-flow,.post-list{grid-template-columns:1fr}}