:root{--ink:#18201b;--muted:#5a6660;--paper:#f7f2e7;--card:#fffaf0;--line:#dccfb4;--moss:#254b3d;--rust:#a05030;--gold:#d6a744;--sky:#9ec7cf;--shadow:0 24px 80px rgba(37,75,61,.16);--ink-strong:#0e1612;--ink-soft:#3d493f;--accent:var(--moss);--accent-ink:#fff;--radius-sm:12px;--radius-md:22px;--radius-lg:34px;--space-1:8px;--space-2:16px;--space-3:24px;--space-4:34px;--shadow-soft:0 16px 40px rgba(37,75,61,.09);--shadow-card:0 24px 80px rgba(37,75,61,.16);--focus-ring:2px solid var(--rust);--font-body:"Georgia","Noto Serif SC","Songti SC",serif;--font-ui:"Trebuchet MS","Noto Sans SC","PingFang SC",sans-serif;--font-display:"Georgia","Noto Serif SC","Songti SC",serif}
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.core-story{display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:stretch}.core-card{position:relative;overflow:hidden;background:linear-gradient(135deg,#fff8df,#eef7f2 62%,#f5d9c8);border:1px solid var(--line);border-radius:34px;padding:34px;box-shadow:var(--shadow)}.core-card:before{content:"";position:absolute;right:-80px;top:-80px;width:220px;height:220px;border-radius:50%;background:rgba(187,90,56,.18)}.core-card h2{font-size:clamp(34px,5vw,62px);line-height:.95;letter-spacing:-.045em;margin:10px 0 16px}.core-card p{font-size:19px;color:#33423a}.core-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn{display:inline-block;border-radius:999px;padding:12px 17px;text-decoration:none;font-weight:700;border:1px solid var(--moss)}.btn.primary{background:var(--moss);color:#fff}.btn.secondary{color:var(--moss);background:rgba(255,255,255,.55)}.story-points{display:grid;gap:12px}.point{background:rgba(255,250,240,.9);border:1px solid var(--line);border-radius:24px;padding:20px}.point b{color:var(--rust)}.map{display:grid;grid-template-columns:1fr;gap:14px}.edge{display:grid;grid-template-columns:140px 1fr;gap:14px;align-items:start;background:rgba(255,250,240,.86);border:1px solid var(--line);border-radius:24px;padding:18px}.edge .node{font-weight:800;color:var(--moss)}.edge p{margin:0;color:var(--muted)}.evidence-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.evidence{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:20px;text-decoration:none;color:inherit;transition:.2s transform}.evidence:hover{transform:translateY(-4px)}.evidence .k{font:700 12px/1 'Trebuchet MS',sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--rust)}.evidence h3{margin:10px 0 6px;font-size:22px}.evidence p{margin:0;color:var(--muted)}.routes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.route{border-radius:26px;border:1px solid var(--line);padding:22px;background:linear-gradient(180deg,#fffaf0,#f4ebd7)}.route h3{margin:0 0 12px}.route ol{padding-left:22px;margin:0}.note-strip{border-left:6px solid var(--rust);background:#fff7df;border-radius:18px;padding:18px 20px;color:#3a463c}.attach-title{display:flex;align-items:end;justify-content:space-between;gap:16px}.attach-title p{max-width:700px;color:var(--muted)}@media(max-width:900px){.core-story,.evidence-grid,.routes{grid-template-columns:1fr}.edge{grid-template-columns:1fr}}

.tutorial-callout{display:grid;grid-template-columns:.85fr 1.15fr;gap:22px;align-items:stretch;background:linear-gradient(135deg,#254b3d,#386b57);color:#fff;border-radius:34px;padding:30px;box-shadow:var(--shadow)}.tutorial-callout .tag{background:rgba(255,255,255,.16);color:#ffe5bd}.tutorial-callout h2{font-size:clamp(34px,5vw,58px);line-height:.98;margin:12px 0}.tutorial-callout p{color:#f6ead2;font-size:18px}.tutorial-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.tutorial-list div{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:18px;padding:14px}.lesson-steps{display:grid;gap:18px}.lesson-step{border:1px solid var(--line);background:#fffaf0;border-radius:24px;padding:22px}.lesson-step span{display:inline-block;font-weight:800;color:#fff;background:var(--rust);border-radius:999px;padding:6px 10px}.lesson-step h3{margin:12px 0 6px}.lesson-step blockquote{margin:14px 0 0;padding:14px 16px;border-left:5px solid var(--gold);background:#fff3d2;border-radius:12px}@media(max-width:900px){.tutorial-callout,.tutorial-list{grid-template-columns:1fr}}

.timeline{display:grid;gap:16px}.turn{border:1px solid var(--line);border-radius:24px;background:#fffaf0;padding:18px}.turn .role{font:800 12px/1 'Trebuchet MS',sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--rust)}.turn h3{margin:8px 0}.turn p{margin:6px 0}.prompt{background:#eef7f2;border-left:5px solid var(--moss);border-radius:14px;padding:12px;margin:10px 0}.outcome{background:#fff3d2;border-left:5px solid var(--gold);border-radius:14px;padding:12px;margin:10px 0}.matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.mini{border:1px solid var(--line);background:#fffaf0;border-radius:22px;padding:18px}.mini b{color:var(--moss)}.callout-red{border-left:6px solid var(--rust);background:#ffe8dc;border-radius:18px;padding:18px 20px}.scriptbox{background:#1c281f;color:#f8f0d8;border-radius:20px;padding:18px;overflow:auto;white-space:pre-wrap}@media(max-width:900px){.matrix{grid-template-columns:1fr}}

/* Knowledge-system landing page */
.knowledge-hero{padding-top:84px}.knowledge-hero h1{max-width:850px}.system-summary{background:#183d32;color:#fff;border-radius:30px;padding:28px;box-shadow:var(--shadow)}.system-summary h2{font-size:28px;margin:8px 0 20px}.system-index{font:700 13px 'Trebuchet MS',sans-serif;letter-spacing:.22em;color:#f3c86c}.system-summary ol{list-style:none;padding:0;margin:0;display:grid;gap:4px}.system-summary li{display:grid;grid-template-columns:110px 1fr;gap:12px;padding:13px 0;border-top:1px solid rgba(255,255,255,.15)}.system-summary span{color:#cfddd5}.system-nav .tools{justify-content:center}.nav-link{color:var(--moss);text-decoration:none;font-weight:700;padding:8px 13px;border-radius:999px}.nav-link:hover{background:#e5ddc9}.layer-section{padding:60px 0}.layer-section:nth-child(even){background:rgba(255,250,240,.36);border-block:1px solid rgba(220,207,180,.5)}.layer-heading{display:grid;grid-template-columns:.7fr 1.3fr;gap:32px;align-items:end;margin-bottom:28px}.layer-heading h2{font-size:clamp(42px,6vw,72px);line-height:.95;margin:5px 0}.layer-heading p{font-size:19px;color:var(--muted);margin:0}.layer-no{font:700 13px 'Trebuchet MS',sans-serif;letter-spacing:.18em;color:var(--rust)}.foundation-feature{display:grid;grid-template-columns:minmax(300px,.72fr) 1.28fr;gap:34px;background:rgba(255,250,240,.92);border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}.infographic-preview{display:block;max-height:690px;overflow:hidden;border-radius:22px;background:#eee8dc;position:relative}.infographic-preview:after{content:'查看完整长图';position:absolute;inset:auto 16px 16px;background:rgba(24,32,27,.86);color:#fff;text-align:center;padding:11px;border-radius:999px;font-weight:700}.infographic-preview img{width:100%;display:block}.foundation-copy{align-self:center;padding:12px 16px 12px 0}.foundation-copy h3{font-size:clamp(34px,4vw,54px);line-height:1.04;letter-spacing:-.035em;margin:16px 0}.foundation-copy p{font-size:19px;color:#3d493f}.concept-chain{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin:24px 0}.concept-chain span{background:#e9dfc8;color:var(--moss);padding:8px 11px;border-radius:999px;font-weight:700}.concept-chain i{font-style:normal;color:var(--rust)}.why-box{background:#edf4ec;border-left:5px solid var(--moss);border-radius:16px;padding:17px 18px;margin:18px 0}.text-link{color:var(--rust);font-weight:800;text-decoration:none}.btn.light{background:#fff;color:var(--moss)}.btn.ghost{color:#fff;border-color:rgba(255,255,255,.6)}.compact-routes{margin-top:18px}.workflow-ladder{display:grid;gap:10px}.workflow-ladder div{display:grid;grid-template-columns:145px 1fr;gap:12px;background:rgba(255,250,240,.9);border:1px solid var(--line);border-radius:18px;padding:17px}.workflow-ladder b{color:var(--rust)}.workflow-ladder span{color:var(--muted)}.system-map{grid-template-columns:repeat(6,1fr);margin-top:22px;gap:10px}.system-map .edge{display:block;padding:16px;min-height:132px;position:relative}.system-map .edge:not(:last-child):after{content:'→';position:absolute;right:-13px;top:50%;z-index:2;color:var(--rust);font-weight:900}.system-map .node{margin-bottom:8px}.evidence-tools{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:20px}.evidence-tools .search{min-width:320px}.filter-pills{display:flex;gap:8px;flex-wrap:wrap}.evidence[hidden]{display:none}.infographic-page{padding:48px 0 80px;max-width:980px}.article-intro{text-align:center;margin:30px auto;max-width:760px}.article-intro h1{font-size:clamp(44px,7vw,78px);line-height:1;margin:14px 0}.article-intro p{font-size:20px;color:var(--muted)}.full-infographic{margin:30px auto;max-width:720px;background:#fff;padding:18px;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}.full-infographic img{width:100%;display:block;border-radius:14px}.full-infographic figcaption{text-align:center;color:var(--muted);font-size:14px;padding-top:12px}.transfer-card{margin-top:36px;background:#edf4ec;border:1px solid #bfcfbd;border-radius:28px;padding:28px}.transfer-card h2{margin-top:0}.transfer-card .matrix{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.system-summary,.layer-heading,.foundation-feature{grid-template-columns:1fr}.foundation-copy{padding:0}.system-map{grid-template-columns:1fr}.system-map .edge{min-height:auto}.system-map .edge:not(:last-child):after{content:'↓';right:50%;top:auto;bottom:-18px}.system-summary li{grid-template-columns:95px 1fr}.transfer-card .matrix{grid-template-columns:1fr}.infographic-preview{max-height:540px}.layer-section{padding:44px 0}}
.foundation-feature-alt{margin-top:24px;grid-template-columns:1.28fr minmax(300px,.72fr)}.skill-feature{display:grid;grid-template-columns:1.2fr 1.5fr auto;gap:24px;align-items:center;margin-top:24px;padding:26px;background:linear-gradient(135deg,#eef0f4,#e2e7ef);border:1px solid #c8d0dc;border-radius:28px}.skill-feature h3{font-size:30px;margin:7px 0}.skill-feature p{margin:0;color:#46546a}.skill-feature code{background:#d4dbe6}.skill-flow{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.skill-flow span{background:#fff;padding:8px 10px;border-radius:999px;font-weight:700;color:#2a3a5c}.skill-flow i{font-style:normal;color:#bb5a38}@media(max-width:900px){.foundation-feature-alt,.skill-feature{grid-template-columns:1fr}.foundation-feature-alt .foundation-copy{order:2}.foundation-feature-alt .infographic-preview{order:1}}
.method-feature{display:grid;grid-template-columns:minmax(280px,.68fr) 1.32fr;gap:30px;align-items:center;margin-top:24px;padding:24px;background:rgba(255,250,240,.92);border:1px solid var(--line);border-radius:30px;box-shadow:0 16px 40px rgba(37,75,61,.09)}.method-preview{display:block;max-height:560px;overflow:hidden;border-radius:20px;position:relative;background:#eee8dc}.method-preview:after{content:'查看完整长图';position:absolute;left:14px;right:14px;bottom:14px;text-align:center;background:rgba(24,32,27,.86);color:#fff;border-radius:999px;padding:10px;font-weight:700}.method-preview img{width:100%;display:block}.method-copy h3{font-size:clamp(32px,4vw,50px);line-height:1.05;letter-spacing:-.035em;margin:15px 0}.method-copy p{font-size:19px;color:#3d493f}@media(max-width:900px){.method-feature{grid-template-columns:1fr}.method-preview{max-height:480px}}
.cognitive-feature{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;padding:30px;margin-bottom:24px;border-radius:34px;background:linear-gradient(135deg,#173e33,#2c5e4d);color:#fff;box-shadow:var(--shadow)}.cognitive-copy h3{font-size:clamp(38px,5vw,62px);line-height:1;margin:14px 0}.cognitive-copy p{font-size:19px;color:#e4eee8}.cognitive-copy .why-box{background:rgba(255,255,255,.1);border-color:#f1c26b;color:#fff}.cognitive-map{display:flex;flex-wrap:wrap;gap:7px;align-items:center;margin:22px 0}.cognitive-map span{background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.18);padding:8px 10px;border-radius:999px}.cognitive-map i{font-style:normal;color:#f1c26b}.cognitive-feature .btn.primary{background:#fff;color:var(--moss)}.cognitive-collage{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-self:stretch}.cognitive-collage img{width:100%;height:210px;object-fit:cover;background:#fff;border-radius:16px}.cog-hero{padding:60px 0 48px;background:linear-gradient(135deg,#173e33,#315e50);color:#fff}.cog-hero .back{color:#f4dca7}.cog-hero h1{font-size:clamp(54px,8vw,100px);margin:18px 0}.cog-hero p{font-size:22px;color:#dce9e2;max-width:760px}.cog-principle{font-size:26px;margin-top:28px;color:#f4dca7}.cog-page{padding:30px 0 80px}.cog-nav{position:sticky;top:0;z-index:4;display:flex;gap:8px;flex-wrap:wrap;background:rgba(247,242,231,.92);backdrop-filter:blur(12px);padding:14px 0}.cog-nav a{color:var(--moss);text-decoration:none;border:1px solid var(--line);background:#fffaf0;border-radius:999px;padding:8px 12px;font-weight:700}.cog-section{padding:54px 0;border-bottom:1px solid var(--line)}.cog-heading{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:end;margin-bottom:24px}.cog-heading>div{display:flex;gap:15px;align-items:baseline}.cog-heading span{font:800 14px 'Trebuchet MS',sans-serif;color:var(--rust)}.cog-heading h2{font-size:clamp(34px,5vw,56px);line-height:1;margin:0}.cog-heading p{font-size:18px;color:var(--muted);margin:0}.image-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.image-grid.two{grid-template-columns:repeat(2,1fr)}.image-grid figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:20px;padding:10px;box-shadow:0 10px 28px rgba(37,75,61,.08)}.image-grid img{width:100%;height:270px;object-fit:contain;display:block;background:#f7f5ef;border-radius:12px}.image-grid figcaption{padding:10px 6px 3px;color:var(--muted);font-size:14px}.feature-grid figure:first-child{grid-column:span 2}.feature-grid figure:first-child img{height:420px}.cog-section blockquote{margin:0 0 24px;padding:20px;border-left:6px solid var(--rust);background:#fff7df;border-radius:16px;font-size:22px}.source-card{margin-top:40px;padding:26px;background:#fffaf0;border:1px solid var(--line);border-radius:24px}.source-card p{color:var(--muted)}.source-card a{color:var(--rust);font-weight:800;text-decoration:none}@media(max-width:900px){.cognitive-feature,.cog-heading{grid-template-columns:1fr}.cognitive-collage img{height:150px}.image-grid,.image-grid.two{grid-template-columns:1fr}.feature-grid figure:first-child{grid-column:auto}.feature-grid figure:first-child img,.image-grid img{height:auto;max-height:520px}.cog-nav{position:static}.cog-section{padding:38px 0}}
.structured-feature{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center;margin-bottom:24px;padding:26px;background:linear-gradient(135deg,#fffaf0,#edf4ec);border:1px solid var(--line);border-radius:30px}.structured-copy h3{font-size:clamp(34px,4vw,52px);line-height:1.05;margin:14px 0}.structured-copy p{font-size:18px;color:var(--muted)}.dikw{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:20px 0}.dikw span{font:700 11px 'Trebuchet MS',sans-serif;letter-spacing:.06em;background:#e4eadf;padding:9px;border-radius:10px;color:var(--moss);text-align:center}.dikw b{font-size:16px}.dikw i{font-style:normal;color:var(--rust)}.structured-thumbs{display:grid;grid-template-columns:1fr 1fr;gap:10px;height:320px}.structured-thumbs img{width:100%;height:155px;object-fit:cover;border-radius:14px;background:#fff}.structured-thumbs img:last-child{grid-column:span 2;object-position:top}.topic-next{display:flex;justify-content:space-between;align-items:center;gap:22px;margin:36px 0;padding:26px;background:#eef3ed;border:1px solid #c5d2c3;border-radius:24px}.topic-next h2{margin:5px 0}.topic-next p{margin:0;color:var(--muted)}.structured-hero{padding:60px 0;background:linear-gradient(135deg,#eef4f6,#eee8f6);border-bottom:1px solid var(--line)}.structured-hero h1{font-size:clamp(56px,8vw,96px);margin:18px 0}.structured-hero p{font-size:21px;max-width:820px;color:var(--muted)}.structured-page{padding:38px 0 80px}.structured-intro{padding:26px;background:#fffaf0;border:1px solid var(--line);border-radius:26px}.dikw.large{justify-content:center}.dikw.large span{font-size:13px;padding:14px 18px}.dikw.large b{font-size:22px}.structured-intro>p{text-align:center;font-size:18px;color:var(--muted);max-width:860px;margin:18px auto 0}.visual-chapter{padding:54px 0;border-bottom:1px solid var(--line)}.chapter-copy{display:grid;grid-template-columns:50px .7fr 1.3fr;gap:18px;align-items:baseline;margin-bottom:22px}.chapter-copy span{font:800 14px 'Trebuchet MS',sans-serif;color:var(--rust)}.chapter-copy h2{font-size:42px;margin:0}.chapter-copy p{font-size:18px;color:var(--muted);margin:0}.hero-figure,.mindmap-figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)}.hero-figure img,.mindmap-figure img{width:100%;display:block;border-radius:12px}.mindmap-figure{max-width:820px;margin-inline:auto}.mindmap-figure img{max-height:1100px;object-fit:contain}.hero-figure figcaption,.mindmap-figure figcaption{text-align:center;padding-top:12px;color:var(--muted)}@media(max-width:900px){.structured-feature,.chapter-copy{grid-template-columns:1fr}.structured-thumbs{height:auto}.structured-thumbs img{height:130px}.topic-next{align-items:flex-start;flex-direction:column}.dikw.large span{padding:10px}.chapter-copy h2{font-size:34px}}
.llm-wiki-feature{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center;padding:26px;background:linear-gradient(135deg,#f2efff,#effbf3 58%,#fff4d9);border:1px solid var(--line);border-radius:34px;box-shadow:var(--shadow)}.llm-wiki-visual{display:block;background:#fff;border-radius:22px;padding:10px;box-shadow:0 14px 36px rgba(65,54,110,.13)}.llm-wiki-visual img{display:block;width:100%;border-radius:14px}.llm-wiki-copy h3{font-size:clamp(34px,4vw,52px);line-height:1.04;margin:14px 0}.llm-wiki-copy p{font-size:18px;color:var(--muted)}.knowledge-pipeline{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin:20px 0}.knowledge-pipeline span{background:#fff;border:1px solid #d8d0ed;color:#46366f;padding:8px 11px;border-radius:999px;font-weight:800}.knowledge-pipeline i{font-style:normal;color:var(--rust)}.knowledge-practice-hero{padding:64px 0 54px;background:linear-gradient(135deg,#33245f,#315d50);color:#fff}.knowledge-practice-hero .back{color:#f6dca2}.knowledge-practice-hero h1{font-size:clamp(54px,8vw,96px);line-height:.95;margin:18px 0}.knowledge-practice-hero p{max-width:820px;font-size:22px;color:#e4e8e5}.knowledge-practice-page{padding:36px 0 80px}.km-bridge{display:grid;grid-template-columns:.85fr 1.15fr;gap:28px;align-items:center;padding:28px;background:#fffaf0;border:1px solid var(--line);border-radius:28px}.km-bridge>div>span{font:800 14px 'Trebuchet MS',sans-serif;color:var(--rust)}.km-bridge h2{font-size:36px;margin:8px 0}.km-bridge p{color:var(--muted);font-size:18px}.knowledge-pipeline.large{justify-content:center}.knowledge-pipeline.large span{padding:12px 14px}.llm-wiki-figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)}.llm-wiki-figure img{display:block;width:100%;border-radius:12px}.llm-wiki-figure figcaption{text-align:center;padding:12px 4px 2px;color:var(--muted)}.practice-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;padding:54px 0}.practice-grid article{background:#fffaf0;border:1px solid var(--line);border-radius:26px;padding:24px}.practice-grid h3{font-size:27px;margin:9px 0 12px}.practice-grid p,.practice-grid li{color:var(--muted)}.practice-grid li+li{margin-top:8px}@media(max-width:900px){.llm-wiki-feature,.km-bridge,.practice-grid{grid-template-columns:1fr}.knowledge-pipeline.large{justify-content:flex-start}.llm-wiki-copy h3{font-size:36px}}

/* Entry poem */
html.intro-pending,html.intro-pending body{overflow:hidden}.poem-intro{display:none;position:fixed;inset:0;z-index:1000;overflow:hidden;color:#f4eddd;background:radial-gradient(circle at 50% 45%,rgba(98,121,98,.18),transparent 32%),linear-gradient(145deg,#0c1612,#172b23 58%,#0d1915)}html.intro-pending .poem-intro{display:grid;place-items:center}.poem-intro:before,.poem-intro:after{content:"";position:absolute;border:1px solid rgba(225,203,155,.14);border-radius:50%;width:min(72vw,780px);aspect-ratio:1}.poem-intro:before{left:-34vw;top:-40vw}.poem-intro:after{right:-38vw;bottom:-46vw}.poem-stage{position:relative;width:min(820px,86vw);text-align:center;z-index:1}.poem-mark{margin-bottom:clamp(24px,5vh,54px);font:700 11px/1 'Trebuchet MS',sans-serif;letter-spacing:.5em;color:#d4b97d;opacity:0;transform:translateY(8px)}.poem{margin:0}.poem p{margin:0 0 clamp(13px,2.2vh,24px);font-size:clamp(20px,3.2vw,38px);line-height:1.65;letter-spacing:.13em}.poem-char{display:inline-block;opacity:0;filter:blur(7px);transform:translateY(10px);white-space:pre}.poem-signature{margin-top:clamp(26px,5vh,48px);font-size:14px;letter-spacing:.22em;color:#aaaf9e;opacity:0}.poem-enter{margin-top:28px;border:1px solid rgba(229,209,164,.55);border-radius:999px;padding:12px 20px;background:transparent;color:#f4eddd;font:700 14px Georgia,'Noto Serif SC',serif;letter-spacing:.13em;cursor:pointer;opacity:0;transform:translateY(8px);transition:.25s background,.25s color}.poem-enter:hover,.poem-enter:focus-visible{background:#e6d2a6;color:#17241e;outline:none}.poem-enter span{display:inline-block;margin-left:8px}.poem-skip{position:absolute;z-index:2;top:clamp(20px,4vw,42px);right:clamp(20px,4vw,48px);border:0;background:transparent;color:#9ba79f;font:13px 'Trebuchet MS',sans-serif;letter-spacing:.15em;cursor:pointer;padding:10px}.poem-skip:hover,.poem-skip:focus-visible{color:#fff;outline:1px solid rgba(255,255,255,.3);border-radius:999px}.poem-progress{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(255,255,255,.08)}.poem-progress i{display:block;width:0;height:100%;background:#d4b97d}.poem-intro.is-playing .poem-mark{animation:poem-rise 1.8s .45s ease forwards}.poem-intro.is-playing .poem-char{animation:poem-char 1.5s calc(1.6s + var(--char)*.3s + var(--line)*1.1s) ease forwards}.poem-intro.is-playing .poem-signature{animation:poem-rise 1.8s 48s ease forwards}.poem-intro.is-playing .poem-enter{animation:poem-rise 1.6s 51s ease forwards}.poem-intro.is-playing .poem-progress i{animation:poem-progress 60s linear forwards}.poem-intro.is-leaving{animation:poem-leave 1.25s cubic-bezier(.65,0,.35,1) forwards}@keyframes poem-char{to{opacity:1;filter:blur(0);transform:none}}@keyframes poem-rise{to{opacity:1;transform:none}}@keyframes poem-progress{to{width:100%}}@keyframes poem-leave{to{opacity:0;filter:blur(10px);visibility:hidden}}@media(max-width:640px){.poem-stage{width:88vw}.poem p{font-size:clamp(18px,5.1vw,25px);letter-spacing:.07em;line-height:1.75}.poem-mark{letter-spacing:.35em}.poem-signature{font-size:12px}}@media(prefers-reduced-motion:reduce){.poem-intro.is-playing .poem-mark{animation:poem-char 1s .45s linear forwards;filter:none;transform:none}.poem-intro.is-playing .poem-char{animation:poem-char .55s calc(1.6s + var(--char)*.3s + var(--line)*1.1s) linear forwards;filter:none;transform:none}.poem-intro.is-playing .poem-signature{animation:poem-char 1s 48s linear forwards;filter:none;transform:none}.poem-intro.is-playing .poem-enter{animation:poem-char 1s 51s linear forwards;filter:none;transform:none}.poem-intro.is-playing .poem-progress i{animation:poem-progress 60s linear forwards}.poem-intro.is-leaving{animation:none;opacity:0}}

/* Environment setup */
.environment-section{padding:58px 0;background:linear-gradient(180deg,rgba(255,250,240,.78),rgba(236,242,233,.74));border-bottom:1px solid var(--line)}.environment-heading{display:grid;grid-template-columns:.85fr 1.15fr;gap:30px;align-items:end;margin-bottom:26px}.environment-heading h2{font-size:clamp(40px,5.5vw,66px);line-height:.98;margin:7px 0}.environment-heading p{font-size:19px;color:var(--muted);margin:0}.environment-feature{padding:28px;border:1px solid var(--line);border-radius:32px;background:#fffaf0;box-shadow:var(--shadow)}.environment-route{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.environment-route span{display:flex;align-items:center;gap:8px;padding:9px 13px;border-radius:999px;background:#e7eee7;color:var(--moss);font-weight:800}.environment-route span b{color:var(--rust);font-size:12px}.environment-route i{font-style:normal;color:var(--rust)}.environment-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0}.environment-grid div{padding:18px;border-radius:20px;background:#f4ead5;border:1px solid #e4d4b4}.environment-grid b{color:var(--moss)}.environment-grid p{margin:6px 0 0;color:var(--muted)}.environment-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.environment-actions span{color:var(--muted)}.start-link{background:var(--rust);color:#fff}.start-link:hover{background:#9e482d}.setup-hero{padding:62px 0 52px;background:linear-gradient(135deg,#203d33,#54472e);color:#fff}.setup-hero .back{color:#f5d9a0}.setup-hero h1{font-size:clamp(54px,8vw,94px);line-height:.95;margin:18px 0}.setup-hero p{max-width:800px;font-size:21px;color:#e6e5d7}.setup-page{padding:36px 0 80px}.setup-overview{display:grid;grid-template-columns:.72fr 1.28fr;gap:24px;align-items:center;padding:24px;border:1px solid var(--line);border-radius:26px;background:#fffaf0}.setup-overview p{margin:5px 0;color:var(--muted)}.setup-step{display:grid;grid-template-columns:100px 1fr;gap:28px;padding:52px 0;border-bottom:1px solid var(--line)}.setup-number{font:800 clamp(48px,7vw,84px)/1 'Trebuchet MS',sans-serif;color:#d3c7ad}.setup-copy h2{font-size:clamp(32px,4vw,48px);line-height:1.05;margin:14px 0}.setup-copy>p{font-size:18px;color:var(--muted)}.setup-check{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:20px 0;padding:16px;border-radius:18px;background:#1c281f;color:#f8f0d8}.setup-check code{background:transparent;color:#f4cf7a;font-size:17px}.setup-list{padding-left:24px;color:var(--muted)}.setup-list li+li{margin-top:8px}.network-options{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:22px 0}.network-options a{display:flex;flex-direction:column;padding:20px;border:1px solid var(--line);border-radius:20px;background:#fffaf0;color:inherit;text-decoration:none}.network-options a:hover{border-color:var(--rust)}.network-options span{color:var(--muted)}.setup-note{padding:16px 18px;border-left:5px solid var(--gold);background:#fff4d7;border-radius:14px}.readiness-card{display:grid;grid-template-columns:1fr 1fr auto;gap:24px;align-items:center;margin-top:42px;padding:28px;border-radius:28px;background:linear-gradient(135deg,#e8efe7,#f7e8cc);border:1px solid var(--line)}.readiness-card h2{margin:6px 0}.readiness-card ul{margin:0;padding-left:22px}.source-card a+span{margin-left:6px}@media(max-width:900px){.environment-heading,.setup-overview,.readiness-card{grid-template-columns:1fr}.environment-grid{grid-template-columns:repeat(2,1fr)}.setup-step{grid-template-columns:70px 1fr}.network-options{grid-template-columns:1fr}}@media(max-width:600px){.environment-grid{grid-template-columns:1fr}.setup-step{grid-template-columns:1fr;gap:10px}.setup-number{font-size:42px}.environment-route i{display:none}}
/* =========================================================
   Typography · 中文排印系统（huashu-design principles）
   Bootstrap override layer. Loaded after all legacy rules.
   ========================================================= */
body{font-family:var(--font-body);line-height:1.8;text-wrap:pretty;text-rendering:optimizeLegibility}
h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance}
.eyebrow,.layer-no,.k,.system-index{font-family:var(--font-ui)}
p{text-wrap:pretty}
.wrap{width:min(1180px,92vw)}
.hero h1,.knowledge-hero h1{font-size:clamp(3rem,1.2rem+7vw,6.5rem);line-height:1.06;letter-spacing:-.04em}
.layer-heading h2{font-size:clamp(2.6rem,1rem+5.5vw,4.5rem);line-height:1.08}
.foundation-copy,.method-copy,.llm-wiki-copy,.structured-copy{max-width:36em}
.lead{letter-spacing:.01em}
/* CJK quotes: 用「」不用于 “” */
.blockquote,blockquote p{font-family:var(--font-serif,var(--font-body))}
/* =========================================================
   Accessibility · 无障碍增强
   ========================================================= */
:focus-visible{outline:var(--focus-ring);outline-offset:3px;border-radius:6px}
a:focus-visible,.btn:focus-visible,.pill:focus-visible,.nav-link:focus-visible,.poem-enter:focus-visible{outline:var(--focus-ring);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
/* =========================================================
   Responsive · 响应式断点补强（新增 640px 档）
   ========================================================= */
@media(max-width:900px){.layer-heading{grid-template-columns:1fr;gap:16px}.evidence-grid{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.evidence-grid{grid-template-columns:1fr}.foundation-feature,.method-feature,.environment-grid,.environment-route{grid-template-columns:1fr}.environment-route{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.layer-section{padding:40px 0}}
@media(max-width:560px){.tutorial-callout h2,.core-card h2{font-size:clamp(1.9rem,8vw,2.6rem)}.system-map .edge{grid-template-columns:1fr}.tools{justify-content:flex-start}.evidence .k{font-size:11px}}
html.intro-pending .poem p{font-size:clamp(18px,6vw,30px);line-height:1.8;letter-spacing:.1em}
/* =========================================================
   Learning progress nav · 学习进度导航
   ========================================================= */
.nav-link{display:inline-flex;align-items:center;gap:6px;transition:background .2s}
.nav-link .progress-dot{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--moss);font:700 11px/1 'Trebuchet MS',sans-serif}
.nav-link .progress-dot.is-done{background:var(--moss);color:#fff;border-color:var(--moss)}
.nav-link.is-current{background:var(--paper);box-shadow:inset 0 0 0 2px var(--moss);color:var(--moss)}
.nav-link[aria-current=true]{background:var(--moss);color:#fff}
@media (prefers-reduced-motion: reduce){.nav-link{transition:none}.progress-dot{transition:none}}