.ra-concept{--ra-accent:#7154d5;--ra-line:#dfdce7;--ra-muted:#666;background:#fff;color:#111;scroll-margin-top:80px}
.ra-concept *{box-sizing:border-box}
.ra-concept .ra-c-intro{max-width:900px;margin:0 auto 72px;text-align:center}
.ra-c-intro>.section-title{line-height:1.35;margin:0 0 26px;word-break:keep-all;overflow-wrap:anywhere}
.ra-c-intro>p:not(.section-caption-border){font-size:20px;line-height:1.85;color:#666;margin-bottom:28px;word-break:keep-all;overflow-wrap:break-word}
.ra-c-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 25px}
.ra-c-nav a{font-size:14px;color:#555;text-decoration:underline;text-underline-offset:5px}
.ra-c-nav a:hover{color:var(--ra-accent)}
.ra-c-block{padding:58px 0;border-top:1px solid #e8e6ed;scroll-margin-top:90px}
.ra-c-block-last{padding-bottom:0}
.ra-c-block-head{max-width:850px;margin-bottom:32px}
.ra-c-block-head>span{display:block;font-size:12px;font-weight:600;letter-spacing:.13em;color:var(--ra-accent);margin-bottom:15px}
.ra-c-block-head h3{font-size:32px;line-height:1.4;letter-spacing:-.025em;margin:0 0 16px;word-break:keep-all;overflow-wrap:break-word}
.ra-c-block-head>p{font-size:18px;line-height:1.85;color:#666;margin:0;word-break:keep-all;overflow-wrap:break-word}
.ra-c-figure{margin:0}
.ra-c-flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px}
.ra-c-flow>li{position:relative;display:flex;flex-direction:column;align-items:flex-start;padding:24px 20px;border:1px solid var(--ra-line);border-radius:12px;background:#faf9fc;min-width:0}
.ra-c-flow>li:nth-child(2),.ra-c-flow>li:nth-child(3){border-color:#c7b9ee;background:#f5f1ff}
.ra-c-flow>li:not(:last-child):after{content:'→';position:absolute;right:-17px;top:38px;color:#958aa8;font-size:20px;z-index:1;line-height:1}
.ra-c-number{font-size:12px;letter-spacing:.08em;color:var(--ra-accent);border:1px solid #d5cbeb;border-radius:50%;width:32px;height:32px;display:grid;place-items:center;margin-bottom:24px}
.ra-c-flow small{font-size:11px;line-height:1.5;font-weight:600;color:#777;margin-bottom:9px;letter-spacing:0}
.ra-c-flow h4{font-size:21px;line-height:1.4;margin:0 0 14px;word-break:keep-all;overflow-wrap:break-word}
.ra-c-flow p{font-size:15px;line-height:1.8;color:#666;margin:0 0 24px;word-break:keep-all;overflow-wrap:break-word}
.ra-c-output{margin-top:auto;border-top:1px solid #e0dbe9;padding-top:12px;width:100%;font-size:11px;line-height:1.6;color:#76678b}
.ra-c-feedback{border:1px dashed #c7bedc;border-radius:0 0 12px 12px;padding:18px 24px;margin:16px 0 0;text-align:center;font-size:15px;color:#69538c;background:#fcfbff;line-height:1.7}
.ra-c-feedback>span{font-size:22px;margin-right:6px;vertical-align:middle}
.ra-c-domain-pair{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:30px}
.ra-c-domain-pair>div{padding:28px;border:1px solid var(--ra-line);border-radius:12px;display:flex;flex-direction:column}
.ra-c-domain-pair small,.ra-c-sync-node small{font-size:11px;letter-spacing:.09em;font-weight:600;color:var(--ra-accent)}
.ra-c-domain-pair h4{font-size:24px;margin:10px 0 12px}
.ra-c-domain-pair p{font-size:16px;line-height:1.85;color:#666;margin:0 0 24px;word-break:keep-all;overflow-wrap:break-word}
.ra-c-layers{display:flex;flex-direction:column;gap:8px;margin-top:auto;align-items:center}
.ra-c-layers>*{display:block;text-align:center;width:100%;padding:10px;border:1px solid #e2ddee;border-radius:6px;background:#faf9fd;font-size:13px;color:#6b617f}
.ra-c-layers>*:nth-child(2){width:83%;background:#f4efff}
.ra-c-layers>strong{width:66%;background:#ece4fe;color:#574180;font-weight:600}
.ra-c-tree{padding:32px;border:1px solid var(--ra-line);border-radius:12px}
.ra-c-tree-root{position:relative;width:max-content;max-width:100%;margin:0 auto;padding:14px 38px;background:#16141d;color:#fff;border-radius:8px;font-size:17px;font-weight:600;text-align:center}
.ra-c-branches{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;padding-top:36px}
.ra-c-branches:before{content:'';position:absolute;top:18px;left:16.66%;right:16.66%;border-top:1px solid #b7abc9}
.ra-c-tree-root:after{content:'';display:block;position:absolute;height:18px;border-left:1px solid #b7abc9;left:50%;top:100%}
.ra-c-branch{position:relative;display:flex;flex-direction:column;align-items:center;text-align:center}
.ra-c-branch:before{content:'';height:18px;border-left:1px solid #b7abc9;position:absolute;top:-18px}
.ra-c-branch>strong,.ra-c-branch>div{width:100%;border:1px solid #ddd6e8;padding:13px 10px;border-radius:7px;font-size:14px;line-height:1.6;font-weight:500;background:#faf9fc}
.ra-c-branch>strong{font-size:16px;background:#f3eefc}
.ra-c-branch>span{font-size:20px;color:#a491c2;line-height:1.8}
.ra-c-branch .ra-c-task{border-style:dashed;background:#fff}
.ra-c-tree figcaption{font-size:15px;color:#666;line-height:1.8;margin-top:26px;word-break:keep-all;overflow-wrap:break-word}
.ra-c-event-figure{padding:32px;border:1px solid var(--ra-line);border-radius:12px;background:#faf9fc}
.ra-c-example-label{font-size:12px;letter-spacing:.02em;color:#777;margin-bottom:22px}
.ra-c-events{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin:0 0 34px}
.ra-c-event{position:relative;display:flex;flex-direction:column;border:1px solid #ddd9e6;border-radius:8px;padding:20px 18px;background:#fff;min-width:0}
.ra-c-event:not(:last-child):after{content:'→';position:absolute;right:-21px;top:42%;color:#8e829e;font-size:22px}
.ra-c-event small{font-size:12px;line-height:1.5;margin-bottom:12px;font-weight:600;color:#666}
.ra-c-event strong{font-size:20px;line-height:1.5;font-weight:600;word-break:keep-all;overflow-wrap:break-word}
.ra-c-event>span{font-size:12px;color:#777;margin-top:12px;line-height:1.7}
.ra-c-event-1{background:#edf7f1;border-color:#b9d6c7}
.ra-c-event-2{background:#fff1e7;border-color:#ebc7ac}
.ra-c-event-3{background:#f0eafd;border-color:#cfc0ed}
.ra-c-screen{border:1px solid #d7d3de;border-radius:10px;overflow:hidden;background:#fff;max-width:850px;margin:auto}
.ra-c-screen-bar{font-size:13px;color:#555;background:#f2f0f5;padding:13px 20px;border-bottom:1px solid #e2dfe7}
.ra-c-screen-bar>span{font-size:10px;letter-spacing:4px;color:#c7c1d0;margin-right:16px}
.ra-c-screen-body{display:grid;grid-template-columns:1fr 1.35fr;gap:24px;padding:28px}
.ra-c-screen-body small{font-size:10px;font-weight:600;letter-spacing:.07em;color:#867b92}
.ra-c-screen-body h4{font-size:16px;margin:8px 0 18px;line-height:1.5}
.ra-c-form{border:1px solid #cae0d4;background:#f9fcfa;padding:22px;border-radius:8px}
.ra-c-field{border:1px solid #dce5df;background:#fff;border-radius:5px;font-size:12px;color:#89968f;padding:14px 10px;margin-bottom:20px}
.ra-c-ui-button{display:block;padding:11px;text-align:center;background:#244d39;color:#fff;font-size:13px;border-radius:5px}
.ra-c-notice{padding:14px;border:1px solid #efd5bf;background:#fff8f2;border-radius:6px;margin-bottom:18px}
.ra-c-notice>span{display:block;font-size:12px;margin-top:5px;color:#956342}
.ra-c-read{padding:16px;border:1px solid #ddd2ef;border-radius:6px}
.ra-c-read table{width:100%;font-size:11px;margin:0;border-collapse:collapse}
.ra-c-read th{font-weight:500;color:#888;padding:8px 6px;border-bottom:1px solid #e9e6ed;text-align:left}
.ra-c-read td{padding:10px 6px;color:#555;text-align:left}
.ra-c-mapping{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:24px;font-size:12px;line-height:1.7;text-align:center;color:#766c83}
.ra-c-note{max-width:900px;margin:22px 0 0;color:#666;font-size:16px;line-height:1.85;word-break:keep-all;overflow-wrap:break-word}
.ra-c-sync{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;gap:28px;padding:36px;border:1px solid var(--ra-line);border-radius:12px;background:#fcfbfe}
.ra-c-sync-node{padding:28px 24px;border:1px solid #d6cbe8;border-radius:10px;background:#fff;min-width:0}
.ra-c-sync-node h4{font-size:23px;line-height:1.5;margin:12px 0 18px;word-break:keep-all;overflow-wrap:break-word}
.ra-c-sync-node p{font-size:13px;color:#777;line-height:1.7;margin:0}
.ra-c-sync-paths{display:flex;flex-direction:column;gap:22px;text-align:center}
.ra-c-sync-paths>div{border-bottom:1px solid #c4b7dd;padding-bottom:14px}
.ra-c-sync-paths strong{display:block;font-size:17px;font-weight:600;color:#69518e}
.ra-c-sync-paths>div>span{display:block;font-size:11px;line-height:1.6;color:#8b7b9e;margin-top:6px}
.ra-c-gate{font-size:11px;letter-spacing:.02em;line-height:1.6;color:#777}
.ra-c-sync-notes{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:24px}
.ra-c-sync-notes p{font-size:15px;line-height:1.85;color:#666;margin:0;word-break:keep-all;overflow-wrap:break-word}
.ra-c-sync-notes strong{display:block;color:#111;font-size:17px;margin-bottom:10px;font-weight:600}
.ra-c-closing{font-size:17px;text-align:center;line-height:1.8;color:#69518e;background:#f8f5fe;padding:22px 24px;border-radius:8px;margin:30px 0 0}
@media(max-width:1199px){.ra-c-flow{gap:16px}.ra-c-flow>li{padding:20px 14px}.ra-c-flow h4{font-size:18px}.ra-c-flow p{font-size:14px}.ra-c-flow>li:not(:last-child):after{right:-15px}.ra-c-sync{padding:26px;gap:18px}.ra-c-sync-node{padding:24px 18px}}
@media(max-width:991px){.ra-concept .ra-c-intro{margin-bottom:46px}.ra-c-flow{grid-template-columns:1fr}.ra-c-flow>li{display:grid;grid-template-columns:36px 1fr;gap:4px 18px;padding:24px}.ra-c-number{grid-row:1/5;margin:0}.ra-c-flow small,.ra-c-flow h4,.ra-c-flow p,.ra-c-output{grid-column:2;margin:0}.ra-c-flow h4{font-size:21px}.ra-c-flow p{font-size:15px;margin:6px 0 12px}.ra-c-flow>li:not(:last-child):after{content:'↓';top:auto;bottom:-17px;left:50%;right:auto;font-size:18px}.ra-c-output{padding-top:10px}.ra-c-sync{grid-template-columns:1fr}.ra-c-sync-paths{gap:14px}.ra-c-sync-paths>div{padding-bottom:10px}.ra-c-sync-node{text-align:center}.ra-c-sync-paths>div>span{font-size:13px}.ra-c-tree{padding:24px}.ra-c-branches{gap:16px}.ra-c-event-figure{padding:24px}.ra-c-screen-body{gap:18px;padding:22px}}
@media(max-width:575px){.ra-c-intro>.section-title{font-size:32px}.ra-c-intro>p:not(.section-caption-border){font-size:17px}.ra-c-nav{gap:12px 20px}.ra-c-nav a{font-size:12px}.ra-c-block{padding:38px 0}.ra-c-block-head h3{font-size:26px}.ra-c-block-head>p{font-size:16px}.ra-c-flow>li{padding:22px 18px;gap:4px 14px}.ra-c-flow h4{font-size:20px}.ra-c-feedback{padding:18px;font-size:14px}.ra-c-domain-pair{grid-template-columns:1fr;gap:18px}.ra-c-domain-pair>div{padding:22px}.ra-c-domain-pair p{font-size:15px}.ra-c-tree{padding:22px 18px}.ra-c-branches{grid-template-columns:1fr;gap:24px;padding-top:26px}.ra-c-branches:before,.ra-c-tree-root:after,.ra-c-branch:before{display:none}.ra-c-branch:after{content:'↓';position:absolute;top:-25px;color:#b7abc9;font-size:18px}.ra-c-branch>strong,.ra-c-branch>div{max-width:300px}.ra-c-tree figcaption{font-size:14px}.ra-c-event-figure{padding:22px 18px}.ra-c-events{grid-template-columns:1fr;gap:18px}.ra-c-event{padding:18px}.ra-c-event:not(:last-child):after{content:'↓';top:auto;bottom:-20px;left:50%;right:auto;font-size:18px}.ra-c-event small{margin-bottom:6px}.ra-c-event strong{font-size:21px}.ra-c-event>span{margin-top:6px}.ra-c-screen-body{grid-template-columns:1fr;padding:16px;gap:18px}.ra-c-screen-bar{padding:12px;font-size:12px}.ra-c-screen-bar>span{margin-right:8px}.ra-c-form{padding:18px}.ra-c-mapping{grid-template-columns:1fr;text-align:left;gap:8px}.ra-c-mapping>span:before{content:'↳ ';color:#b1a0c7}.ra-c-note{font-size:15px}.ra-c-sync{padding:22px 18px}.ra-c-sync-node h4{font-size:22px}.ra-c-sync-notes{grid-template-columns:1fr;gap:20px}.ra-c-closing{font-size:15px;padding:20px}.ra-c-block-last{padding-bottom:0}}