@charset "UTF-8";
:root{--paper:#f7f6f0;--white:#fffefb;--ink:#20332d;--muted:#607168;--line:#d8dfd7;--green:#244f3f;--soft:#e9eee6;--accent:#a75f34;--max:1240px;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}a:hover{color:var(--green);text-decoration:underline;text-underline-offset:5px}button,input{font:inherit}button,a,input{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #bb813d;outline-offset:4px}img{display:block;max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1,h2,h3{text-wrap:balance}h1{font-size:clamp(2rem,3.6vw,3.8rem);line-height:1.28;letter-spacing:-.045em;font-weight:700}h2{font-size:clamp(1.35rem,2.2vw,2rem);line-height:1.45;letter-spacing:-.025em}h3{font-size:1.15rem;line-height:1.6}p{line-height:1.9}li{line-height:1.85}::selection{background:#cce0c8}html{scroll-behavior:smooth;scroll-padding-top:1.5rem}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.kg-skip{position:fixed;top:-60px;left:1rem;z-index:10;background:var(--green);color:white;padding:.8rem}.kg-skip:focus{top:.5rem}
.kg-header{max-width:var(--max);margin:auto;padding:1.8rem 2rem 0}.kg-header-top{display:flex;align-items:center;gap:2rem;justify-content:space-between}.kg-brand{display:flex;align-items:center;gap:.85rem}.kg-brand:hover{text-decoration:none}.kg-mark{display:grid;place-items:center;width:43px;height:45px;background:var(--green);color:var(--white);font-family:"Songti SC","SimSun",serif;font-size:1.65rem;border-radius:4px}.kg-brand strong{display:block;font-size:1.2rem;letter-spacing:.1em}.kg-brand small{display:block;font-size:.74rem;color:var(--muted);margin-top:.3rem;letter-spacing:.12em}.kg-search{display:flex;max-width:365px;flex:1;border-bottom:1px solid #899a8d;padding:.35rem 0}.kg-search input{border:0;background:transparent;min-width:0;flex:1;padding:.5rem;color:var(--ink);font-size:.88rem}.kg-search button{border:0;background:transparent;color:var(--green);padding:.5rem .7rem;font-weight:600}.kg-nav{display:flex;gap:1.75rem;border-bottom:1px solid var(--line);margin-top:1.8rem;padding-bottom:1rem;font-size:.9rem;align-items:center}.kg-nav a{white-space:nowrap;position:relative}.kg-nav [aria-current]{font-weight:700}.kg-nav [aria-current]:after{content:"";position:absolute;height:3px;background:var(--green);bottom:-1.08rem;left:0;right:0}.kg-nav a:last-child{margin-left:auto;color:var(--muted)}.kg-menu-button{display:none}
main{max-width:var(--max);margin:auto;padding:0 2rem}.kg-overline{font-size:.77rem;letter-spacing:.06em;color:var(--muted);margin-bottom:.8rem;font-weight:600}.kg-lead{font-size:1.08rem;line-height:1.95;max-width:47rem;color:#4a6055}.kg-hero{display:grid;grid-template-columns:1.12fr 1fr;gap:5rem;padding:5rem 0 4rem;align-items:center}.kg-hero h1{font-family:"Songti SC","STSong","SimSun",serif;font-size:clamp(2.9rem,4.6vw,4.5rem);font-weight:600;line-height:1.25;margin-bottom:1.6rem;letter-spacing:-.04em}.kg-hero .kg-lead{max-width:29rem}.kg-actions{display:flex;gap:1.8rem;align-items:center;margin-top:1.8rem;font-size:.9rem}.kg-button{display:inline-block;background:var(--green);color:var(--white);padding:.85rem 1.3rem;border-radius:3px;font-weight:600;font-size:.9rem;transition:background .2s,transform .2s}.kg-button:hover{color:white;background:#163d2e;text-decoration:none}.kg-button:active{transform:translateY(1px)}.kg-hero-note{font-size:.73rem;color:var(--muted);margin:1.3rem 0 0}.kg-learning-map{background:var(--soft);border:1px solid #d0dbcd;padding:1.5rem 2rem 1rem;position:relative;box-shadow:9px 9px 0 #e7e6dc}.kg-map-label{display:block;font-size:.78rem;color:var(--muted);padding-bottom:1.1rem;border-bottom:1px solid #c8d2c5;letter-spacing:.09em}.kg-learning-map>div{display:grid;grid-template-columns:2.8rem 1fr;column-gap:.7rem;padding:1.1rem 0;border-bottom:1px solid #cfd7cb}.kg-learning-map>div:last-child{border:0}.kg-learning-map strong{grid-row:1/3;color:#6b806e;font-size:.85rem;font-family:monospace;padding-top:.3rem;font-weight:400}.kg-learning-map h2{font-size:1.12rem;margin-bottom:.15rem}.kg-learning-map p{font-size:.86rem;margin:0;color:#5b7062}
.kg-section{padding:3rem 0;border-top:1px solid var(--line)}.kg-section-heading{margin-bottom:1.8rem;max-width:47rem}.kg-section-heading h2{margin-bottom:.7rem}.kg-section-heading>p:last-child{font-size:.95rem;color:var(--muted)}.kg-portals{display:grid;grid-template-columns:1fr 1fr;gap:0 3rem}.kg-portals>a{display:flex;gap:1.2rem;padding:1.4rem 0;border-top:1px solid var(--line);align-items:start}.kg-portals>a:first-child{grid-row:span 2;background:var(--soft);padding:1.8rem;border-top:3px solid var(--green);margin-right:.6rem}.kg-portals>a:hover{text-decoration:none}.kg-portals h3{margin-bottom:.5rem}.kg-portals p{font-size:.9rem;color:var(--muted);margin-bottom:0}.kg-portals span{color:#8e9a8d;font-family:monospace;font-size:.8rem;padding-top:.35rem}.kg-portals b{font-weight:400;margin-left:auto}.kg-reading-list{border-top:1px solid var(--line)}.kg-index-row{display:flex;gap:1.3rem;align-items:flex-start;border-bottom:1px solid var(--line);padding:1.4rem .25rem}.kg-index-row>div{flex:1;min-width:0}.kg-index-row .kg-overline{margin-bottom:.25rem;font-size:.72rem}.kg-index-row h3{margin-bottom:.35rem;font-size:1.08rem}.kg-index-row h2{font-size:1.18rem;margin-bottom:.3rem}.kg-index-row p:last-child{font-size:.88rem;color:var(--muted);margin-bottom:0;max-width:62rem;line-height:1.85}.kg-row-arrow{padding-top:1.2rem;color:#819582}.kg-row-marker{font-family:monospace;font-size:1.4rem;color:var(--accent);padding-top:.75rem}.kg-guides-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}.kg-guides-grid .kg-index-row{border-top:2px solid #b6c6b6;gap:.8rem}.kg-proof{display:grid;grid-template-columns:1fr 1.25fr;gap:3.5rem;background:var(--soft);padding:2.5rem;margin:1rem 0 4rem;align-items:center}.kg-proof>div>p{font-size:.94rem}.kg-proof .kg-screenshot{margin:0}.kg-proof a{font-size:.9rem;font-weight:600}.kg-proof h2{font-family:"Songti SC","SimSun",serif;font-size:2rem}
.kg-crumbs{display:flex;flex-wrap:wrap;gap:.55rem;font-size:.76rem;color:var(--muted);padding:1.5rem 0 0;line-height:1.8}.kg-crumbs>span[aria-current]{max-width:80ch}.kg-page-intro{padding:2.7rem 0 2rem;max-width:57rem}.kg-page-intro h1{margin-bottom:1rem}.kg-subnav{display:flex;gap:.65rem;flex-wrap:wrap;margin-top:1.7rem}.kg-subnav a{padding:.5rem .75rem;background:var(--soft);font-size:.84rem}.kg-subnav [aria-current]{background:var(--green);color:white}.kg-catalog>section{padding:1.2rem 0 2rem}.kg-catalog>section>h2{font-size:1.3rem;border-bottom:2px solid #a6b7a3;padding-bottom:.75rem}.kg-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:4rem;padding:2.2rem 0 4rem}.kg-article{min-width:0;max-width:790px}.kg-article h1{font-size:clamp(1.95rem,3.15vw,3.1rem);margin-bottom:1.4rem}.kg-article .kg-lead{font-size:1.06rem;margin-bottom:1.4rem}.kg-meta{display:flex;gap:.8rem 1.5rem;flex-wrap:wrap;font-size:.74rem;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:1.6rem}.kg-article section{margin-top:2.1rem;scroll-margin-top:2rem}.kg-article section h2{font-size:1.35rem;margin-bottom:.75rem}.kg-article section p{font-size:1rem;line-height:2;overflow-wrap:anywhere;max-width:47rem}.kg-article section h3{font-size:1.05rem}.kg-article a:not(.kg-button){text-decoration:underline;text-underline-offset:4px;color:var(--green)}.kg-article-sidebar>div{position:sticky;top:2rem;border-left:1px solid var(--line);padding-left:1.3rem}.kg-article-sidebar ol{padding-left:1.15rem;font-size:.8rem;line-height:1.9;color:var(--muted);margin-bottom:1.5rem}.kg-article-sidebar li{padding-bottom:.45rem}.kg-article-sidebar .kg-button{font-size:.8rem;padding:.7rem 1rem}.kg-question-list{padding-left:1.35rem}.kg-question-list li{padding:.6rem 0;border-bottom:1px solid var(--line)}.kg-question-list strong{font-size:.95rem}.kg-question-list p{font-size:.9rem!important;margin-bottom:.5rem!important;color:var(--muted)}.kg-note{background:var(--soft);padding:1rem 1.2rem;font-size:.86rem!important}.kg-screenshot{margin:2.2rem 0 1rem}.kg-screenshot img{border:1px solid var(--line);background:var(--white);width:100%;height:auto}.kg-screenshot figcaption{font-size:.74rem;color:var(--muted);line-height:1.8;padding-top:.6rem}.kg-next-action{background:var(--soft);border-left:3px solid var(--green);padding:1.5rem;margin-top:2.2rem}.kg-next-action h2{font-size:1.3rem}.kg-next-action p{font-size:.9rem}.kg-next-action a{display:inline-block;font-size:.85rem;margin-right:1.5rem;margin-bottom:.4rem}.kg-simple{padding:3rem 0 5rem}.kg-simple p{line-height:2.1}.kg-footer{max-width:var(--max);margin:2rem auto 0;padding:2.5rem 2rem;border-top:1px solid var(--line);display:grid;grid-template-columns:1.5fr 1fr;gap:1rem 2rem;color:var(--muted);font-size:.8rem}.kg-footer strong{color:var(--ink);font-size:1rem}.kg-footer p{margin:.6rem 0}.kg-footer>div:nth-child(2){display:flex;flex-wrap:wrap;gap:1rem;justify-content:flex-end;align-content:start}.kg-footer>p{grid-column:1/-1;margin-bottom:0;font-size:.72rem}#search-status{font-size:.9rem;color:var(--muted)}
.ob-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
  padding: 3.5rem 0;
}
.ob-hero h1 {
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-weight: 600;
  font-size: clamp(2.25rem, 3.4vw, 3.25rem);
  line-height: 1.4;
  margin-bottom: 1.25rem;
}
.ob-hero .kg-lead { font-size: 1rem; }
.ob-network {
  margin: 0;
  padding: 2rem 1.5rem 1.25rem;
  background: var(--soft);
  border: 1px solid var(--line);
}
.ob-network-core {
  width: fit-content;
  max-width: 100%;
  margin: auto;
  padding: 1rem 1.25rem;
  text-align: center;
  background: var(--green);
  color: var(--white);
}
.ob-network-core strong { display: block; font-size: 1.2rem; margin-bottom: .5rem; }
.ob-network-core span { font-size: .85rem; line-height: 1.7; }
.ob-network-branches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-top: 2rem;
  position: relative;
}
.ob-network-branches::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  height: 1rem;
  border-left: 1px solid var(--green);
}
.ob-network-branches > div {
  position: relative;
  padding: 1rem .75rem;
  background: var(--white);
  border-top: 2px solid var(--green);
}
.ob-network-branches > div::before {
  content: "";
  position: absolute;
  height: 1rem;
  width: calc(50% + .5rem);
  top: calc(-1rem - 2px);
  border-top: 1px solid var(--green);
}
.ob-network-branches > div:first-child::before { left: 50%; border-left: 1px solid var(--green); }
.ob-network-branches > div:last-child::before { right: 50%; border-right: 1px solid var(--green); }
.ob-network-branches strong { font-size: .8rem; line-height: 1.8; }
.ob-network-branches p { font-size: .8rem; color: var(--muted); margin: .5rem 0 0; }
.ob-network figcaption { font-size: .75rem; line-height: 1.9; color: var(--muted); margin-top: 1rem; }
.ob-reading-path { max-width: 55rem; }
.ob-reading-path p { margin-bottom: .75rem; }
.ob-cases { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.ob-case { padding: 1.5rem; background: var(--white); border-top: 3px solid var(--green); min-width: 0; }
.ob-case-source { font-size: .8rem; color: var(--muted); margin-bottom: .5rem; }
.ob-case h3 { font-size: 1.3rem; margin-bottom: 1rem; }
.ob-case dl { margin: 0; }
.ob-case dl > div { margin-bottom: .75rem; }
.ob-case dt { font-size: .75rem; color: var(--muted); margin-bottom: .25rem; }
.ob-case dd { margin: 0; font-size: .9rem; line-height: 1.9; }
.ob-expression { margin: 1.25rem 0; padding: 1rem; background: var(--soft); font-size: 1rem; font-weight: 600; overflow-wrap: anywhere; }
.ob-case-lesson { font-size: .85rem; color: var(--muted); margin-bottom: 0; }
.ob-shared-relation { margin-top: 1.5rem; padding-left: 1.25rem; border-left: 3px solid var(--green); }
.ob-shared-relation h3 { margin-bottom: .5rem; }
.ob-shared-relation p { font-size: .95rem; max-width: 57rem; margin-bottom: .75rem; }
.ob-shared-relation a, .ob-relations a { font-size: .85rem; text-decoration: underline; text-underline-offset: 4px; }
.ob-relations { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 3rem; }
.ob-relations article { padding: 1.25rem 0; border-top: 1px solid var(--line); }
.ob-relations h3 { margin-bottom: .5rem; }
.ob-relations p { color: var(--muted); font-size: .9rem; margin-bottom: .75rem; }
.ob-analogy { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 3rem; background: var(--soft); padding: 2rem; margin: 1rem 0 3rem; }
.ob-analogy p { font-size: .95rem; }
.ob-analogy > div > p:last-child { margin-bottom: 0; }
.ob-analogy-relations > div { padding: 1rem 0; border-top: 1px solid #b6c6b6; }
.ob-analogy-relations strong { font-size: .8rem; color: var(--muted); }
.ob-analogy-relations p { font-size: 1.2rem; margin: .5rem 0; }
.ob-analogy-relations span { font-size: .85rem; line-height: 1.9; }
.ob-pattern-process { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem; list-style: none; padding: 0; margin: 0; }
.ob-pattern-process li { border-top: 2px solid #a6b7a3; padding-top: 1rem; }
.ob-pattern-process h3 { font-size: 1rem; margin-bottom: .5rem; }
.ob-pattern-process p { font-size: .85rem; color: var(--muted); margin-bottom: 0; }
.ob-learning-value { margin-top: 2rem; max-width: 55rem; }
.ob-learning-value h3 { margin-bottom: .5rem; }
.ob-learning-value p { font-size: .95rem; margin-bottom: 0; }
.ob-setup-link { margin-top: 1.5rem; font-size: .85rem; }
@media (max-width: 1050px) {
  .ob-hero { gap: 2rem; }
  .ob-network { padding: 1.5rem 1rem 1rem; }
  .ob-hero .kg-actions { gap: 1rem; flex-wrap: wrap; }
  .ob-pattern-process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .ob-hero { grid-template-columns: 1fr; padding: 2rem 0; }
  .ob-hero h1 { font-size: 2.2rem; }
  .ob-cases, .ob-relations, .ob-analogy { grid-template-columns: 1fr; }
  .ob-cases { gap: 1.25rem; }
  .ob-case { padding: 1.25rem; }
  .ob-expression { font-size: .95rem; padding: .75rem; }
  .ob-analogy { gap: 1.5rem; padding: 1.5rem 1.25rem; margin: 0 -1.25rem 2rem; }
  .ob-pattern-process { gap: 1.5rem 1rem; }
}
@media(min-width:1500px){.kg-hero{padding-top:5.8rem;padding-bottom:5.2rem}}
@media(max-width:1050px){.kg-nav{gap:1rem;font-size:.81rem}.kg-hero{gap:2.5rem}.kg-article-layout{gap:2rem;grid-template-columns:minmax(0,1fr) 195px}.kg-proof{gap:2rem;padding:2rem}.kg-guides-grid{gap:1.3rem}}
@media(max-width:760px){.kg-header{padding:1.2rem 1.25rem 0}.kg-header-top{gap:1rem;flex-wrap:wrap}.kg-brand strong{font-size:1.05rem}.kg-brand small{font-size:.65rem}.kg-mark{width:37px;height:40px}.kg-search{order:3;max-width:none;flex-basis:100%;margin-top:.3rem}.kg-menu-button{display:block;margin-left:auto;background:transparent;border:1px solid #a9b8a9;padding:.4rem .7rem;font-size:.8rem;border-radius:3px;color:var(--green)}.kg-nav{display:none;flex-wrap:wrap;margin-top:1rem;padding:1rem 0;gap:1rem 1.25rem}.kg-nav.is-open{display:flex}.kg-nav a:last-child{margin-left:0}.kg-nav [aria-current]:after{bottom:-.25rem}main{padding:0 1.25rem}.kg-hero{grid-template-columns:1fr;gap:2.5rem;padding:2.7rem 0 2.5rem}.kg-hero h1{font-size:3.05rem}.kg-hero .kg-lead{font-size:1rem}.kg-actions{gap:1.2rem;flex-wrap:wrap}.kg-hero-note{font-size:.7rem}.kg-learning-map{padding:1.25rem 1.5rem;box-shadow:6px 6px 0 #e7e6dc}.kg-learning-map>div{padding:.85rem 0}.kg-section{padding:2rem 0}.kg-portals{grid-template-columns:1fr}.kg-portals>a:first-child{grid-row:auto;margin-right:0;padding:1.4rem}.kg-guides-grid{grid-template-columns:1fr;gap:0}.kg-proof{grid-template-columns:1fr;gap:1rem;margin:0 -1.25rem 2rem;padding:2rem 1.25rem}.kg-article-layout{display:flex;flex-direction:column;gap:1.7rem;padding:1.7rem 0 2.5rem}.kg-article-sidebar{order:-1}.kg-article-sidebar>div{position:static;border-left:0;background:var(--soft);padding:.9rem 1rem}.kg-article-sidebar .kg-overline{margin-bottom:.3rem}.kg-article-sidebar ol{display:flex;flex-wrap:wrap;gap:.2rem 1rem;list-style:none;padding:0;margin:0}.kg-article-sidebar .kg-button{display:none}.kg-article-sidebar li{padding:0;line-height:1.9;font-size:.74rem}.kg-article h1{font-size:2rem;line-height:1.4}.kg-article .kg-lead{font-size:1rem}.kg-article section p{font-size:.97rem}.kg-article section{margin-top:1.8rem}.kg-article section h2{font-size:1.25rem}.kg-article .kg-meta{gap:.5rem 1rem}.kg-page-intro{padding:2.1rem 0 1.2rem}.kg-crumbs{font-size:.7rem;padding-top:1rem}.kg-crumbs>span[aria-current]{max-width:100%}.kg-index-row{gap:.8rem;padding:1.25rem 0}.kg-index-row h3{font-size:1.04rem}.kg-index-row p:last-child{font-size:.84rem}.kg-row-marker{display:none}.kg-row-arrow{font-size:.9rem}.kg-footer{padding:2rem 1.25rem;grid-template-columns:1fr;gap:1rem}.kg-footer>div:nth-child(2){justify-content:flex-start}.kg-next-action{padding:1.15rem}.kg-screenshot figcaption{font-size:.7rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}