/* 展示版首页 /show/（2026-11-03）：黑白交替的整屏分段，橙色小标签 + 居中大标题。不引外部字体与脚本。 */
:root{--bk:#0b0b0f;--lt:#f5f5f7;--ink:#1d1d1f;--mut:#6e6e73;--dmut:#a1a1aa;--or:#ff8a3d;--bl:#2f7cf6;--line:#d2d2d7}
*{box-sizing:border-box}
html{scroll-snap-type:y proximity}
body{margin:0;background:var(--bk);color:var(--ink);font:17px/1.7 "PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.top{position:fixed;inset:0 0 auto 0;z-index:20;height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 44px;color:#f5f5f7;transition:background .25s}
.top.solid{background:rgba(11,11,15,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.brand{display:flex;align-items:center;gap:11px;font-size:16px}
.mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--bl),var(--or));font-size:11px;font-weight:700;color:#fff}
.top-r{display:flex;gap:10px;align-items:center}
.tbtn{font:inherit;font-size:13px;color:#e5e5ea;background:transparent;border:1px solid rgba(255,255,255,.25);border-radius:99px;padding:5px 15px;cursor:pointer}
.tbtn:hover,.tbtn.on{background:rgba(255,255,255,.14)}.tbtn.solid{background:#f5f5f7;color:#111;border-color:#f5f5f7;font-weight:600}
.dots{position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:20;display:flex;flex-direction:column;gap:12px}
.dots button{position:relative;width:10px;height:10px;border-radius:50%;border:1.5px solid #8e8e93;background:transparent;padding:0;cursor:pointer}
.dots button.on{background:var(--or);border-color:var(--or);transform:scale(1.3)}
.dots button span{position:absolute;right:20px;top:50%;transform:translateY(-50%);white-space:nowrap;font-size:12px;background:#000;color:#fff;border-radius:6px;padding:2px 9px;opacity:0;pointer-events:none;transition:opacity .15s}
.dots button:hover span{opacity:1}
.seg{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:110px 120px 80px;scroll-snap-align:start;overflow:hidden}
.seg.dark{background:var(--bk);color:#f5f5f7}.seg.light{background:var(--lt)}.seg.light2{background:#fff}
.seg-in{position:relative;width:100%;max-width:1240px;margin:0 auto}.seg-in.wide{max-width:1380px}
.center{text-align:center}
.tag{margin:0 0 18px;font-size:14px;font-weight:600;letter-spacing:.14em;color:var(--or)}
.seg h1,.seg h2{margin:0;font-weight:700;letter-spacing:-.01em}
.seg h1{font-size:76px;line-height:1.16}
.seg h2{font-size:56px;line-height:1.2}
.sub{margin:22px auto 0;max-width:820px;font-size:22px;line-height:1.6;color:var(--mut)}
.dark .sub{color:var(--dmut)}
.hero canvas{position:absolute;inset:0;width:100%;height:100%}
.hero{background:radial-gradient(900px 600px at 50% 45%,#12203f 0,var(--bk) 70%)}
.cta{display:flex;gap:14px;justify-content:center;margin-top:44px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:99px;font-size:17px;font-weight:600;border:1px solid transparent;transition:transform .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn.solid{background:var(--bl);color:#fff}.btn.solid:hover{background:#4a8ff8}
.btn.line{border-color:rgba(255,255,255,.4);color:#f5f5f7}.btn.line:hover{background:rgba(255,255,255,.1)}
.btn.sm{padding:6px 16px;font-size:14px}
.light .btn.line{color:var(--ink);border-color:var(--line)}
/* 主线 */
.flow{display:flex;align-items:stretch;justify-content:center;gap:6px;margin-top:56px}
.fnode{flex:1 1 0;max-width:190px;background:#fff;border-radius:20px;padding:22px 16px 20px;text-align:left;box-shadow:0 2px 0 rgba(0,0,0,.03),0 14px 36px rgba(0,0,0,.06)}
.fnode.core{background:var(--bk);color:#f5f5f7}.fnode.core p{color:var(--dmut)}
.fno{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--or);color:#fff;font-size:12px;font-weight:700}
.fnode b{display:block;margin:10px 0 4px;font-size:18px}.fnode p{margin:0;font-size:13px;line-height:1.6;color:var(--mut)}
.farr{align-self:center;color:#b0b0b8;font-style:normal;font-size:20px}
.loopbar{margin:26px auto 0;max-width:1000px;border:1.5px dashed #c7c7cc;border-top:0;border-radius:0 0 22px 22px;height:44px;position:relative}
.loopbar span{position:absolute;left:50%;bottom:-13px;transform:translateX(-50%);background:var(--lt);padding:0 16px;font-size:14px;color:var(--mut);white-space:nowrap}
/* 本体 */
.four{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:48px;text-align:left}
.f4{border:1px solid #2a2a31;border-radius:18px;padding:20px 22px;background:#121218}.f4 b{font-size:24px;color:var(--or)}.f4 p{margin:4px 0 0;font-size:14px;color:var(--dmut)}
.onto-art{margin-top:36px}.onto-art svg{width:100%;max-width:900px;height:auto}
.ob rect{fill:#17171d;stroke:#3a3a44}.ob text{fill:#f5f5f7;font-size:18px;font-family:inherit}
.ob.hot rect{fill:var(--bl);stroke:var(--bl)}.ob.rule rect{fill:#2a1c10;stroke:var(--or)}.ob.rule text{fill:#ffb27a;font-size:16px}
.ob.act rect{fill:#10223f;stroke:var(--bl)}.ob.act text{fill:#9cc2ff;font-size:16px}
.oe{stroke:#6a6a75;stroke-width:1.6;fill:none}.oe.dash{stroke-dasharray:4 4}.oa{stroke:#6a6a75;stroke-width:1.6;fill:none}.ol{fill:#a1a1aa;font-size:14px;font-family:inherit}
/* 做法 */
.cards6{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:52px;text-align:left}
.pc{background:#fff;border-radius:22px;padding:28px 28px 26px;box-shadow:0 14px 36px rgba(0,0,0,.06)}
.pc span{font-size:13px;font-weight:700;color:var(--or);letter-spacing:.1em}.pc h3{margin:6px 0 8px;font-size:23px}.pc p{margin:0;color:var(--mut);font-size:16px}
/* 技术 */
.seg.techseg{background-color:#0b0b0f;background-image:radial-gradient(700px 460px at 30% 55%,rgba(47,124,246,.16),transparent 70%),linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:auto,44px 44px,44px 44px}
.tech-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;margin-top:46px;text-align:left;align-items:center}
.tech-stack{display:flex;flex-direction:column;gap:7px}
.tl{display:grid;grid-template-columns:34px 170px 1fr;align-items:center;border:1px solid #2a2a31;border-radius:12px;padding:10px 16px;background:rgba(18,18,24,.85);transform:skewX(-8deg)}
.tl>*{transform:skewX(8deg)}.tl span{font-family:"SF Mono",Menlo,monospace;font-size:12px;color:var(--or)}.tl b{font-size:16px}.tl em{font-style:normal;font-size:13px;color:var(--dmut)}
.tl:nth-child(4){border-color:var(--bl);background:rgba(47,124,246,.16)}
.tech-flows{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.tf{border:1px solid #2a2a31;border-radius:16px;padding:14px 16px;background:rgba(18,18,24,.85);transition:border-color .2s,transform .2s}
.tf:first-child{grid-column:1/-1}
.tf:hover{border-color:var(--or);transform:translateY(-2px)}
.tf svg{width:64px;height:40px;display:block;margin-bottom:6px}
.tf svg rect,.tf svg circle{fill:#2a2a35}.tf svg .on{fill:var(--or)}.tf svg .ln{fill:#1c1c24;stroke:#33333d}.tf svg .ln2{stroke:#44444f;stroke-dasharray:2 3}
.tf svg .fl{fill:none;stroke:var(--or);stroke-width:1.6;stroke-dasharray:4 4;animation:tdash 1.2s linear infinite}
@keyframes tdash{to{stroke-dashoffset:-16}}
.tf b{font-size:17px}.tf p{margin:2px 0 0;font-size:13.5px;color:var(--dmut);line-height:1.5}
/* 案例 */
.casewall{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:20px;margin-top:48px;text-align:left}
.case{background:#121218;border:1px solid #2a2a31;border-radius:22px;padding:26px 28px;display:flex;flex-direction:column;transition:border-color .2s,transform .2s}
.case:hover{border-color:#4a5a80;transform:translateY(-2px)}
.st{display:inline-block;font-size:12px;font-weight:600;padding:2px 12px;border-radius:99px;background:#2a2a31;color:#d1d1d6}
.st.ok{background:#12301f;color:#6fdc9c}.st.run{background:#3a2412;color:#ffb27a}.st.info{background:#10223f;color:#9cc2ff}
.case h3{margin:14px 0 2px;font-size:24px}.scene{margin:0;color:var(--dmut);font-size:15px}
.case ul{list-style:none;padding:0;margin:16px 0 20px;display:flex;flex-wrap:wrap;gap:8px}.case li{font-size:13px;border:1px solid #33333b;border-radius:8px;padding:1px 10px;color:#c7c7cc}
.case-a{margin-top:auto;display:flex;gap:10px}
.mods{margin-top:40px}.mods-t{font-size:13px;letter-spacing:.14em;color:var(--dmut);margin:0 0 12px}
.mods-g{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.mod{display:flex;align-items:center;gap:12px;border:1px solid #2a2a31;border-radius:14px;padding:8px 16px;font-size:15px}
.mod a{font-size:13px;color:var(--bl)}.mod a:hover{text-decoration:underline}
/* 导览 */
.guide{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px;text-align:left}
.gc{background:#fff;border-radius:22px;padding:24px 26px;box-shadow:0 14px 36px rgba(0,0,0,.06);display:flex;flex-direction:column}
.gno{font-size:13px;font-weight:700;color:var(--or);letter-spacing:.1em}.gc h3{margin:4px 0 6px;font-size:22px}.gc p{margin:0;color:var(--mut);font-size:15px}
.gl{display:flex;flex-wrap:wrap;gap:6px 16px;margin:14px 0 4px}.gl a{font-size:14px;color:var(--bl)}.gl a:hover{text-decoration:underline}
/* 路线 */
/* 结尾 */
.resetbox{margin:70px auto 0;max-width:900px;font-size:13px;color:var(--dmut)}.resetbox p{margin:0 0 10px}
.reset-list{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.rbtn{font:inherit;font-size:12px;color:#c7c7cc;background:transparent;border:1px solid #3a3a44;border-radius:99px;padding:5px 12px;cursor:pointer}.rbtn:hover{border-color:var(--or);color:var(--or)}
.msg{min-height:22px;color:#6fdc9c}
@media (max-width:1180px){.seg{padding:96px 28px 60px}.seg h1{font-size:44px}.seg h2{font-size:36px}.flow{flex-wrap:wrap}.farr{display:none}.four,.cards6,.guide{grid-template-columns:1fr 1fr}.tech-wrap{grid-template-columns:1fr}.tl{grid-template-columns:30px 1fr;transform:none}.tl>*{transform:none}.tl em{grid-column:2}.dots{display:none}.top{padding:0 18px}}
/* 11-03 第四版：首屏落地场景条、落地一章（白底） */
.landing{margin:46px auto 0;max-width:1180px}.land-t{margin:0 0 14px;font-size:13px;letter-spacing:.16em;color:var(--dmut)}
.land-g{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.lc{display:flex;flex-direction:column;align-items:flex-start;gap:1px;min-width:168px;max-width:236px;padding:10px 16px 11px;border-radius:14px;text-align:left;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(6px);transition:border-color .2s,transform .2s,background .2s}
.lc:hover{border-color:var(--or);background:rgba(255,255,255,.1);transform:translateY(-2px)}
.lc i{font-style:normal;font-size:11px;font-weight:700;letter-spacing:.08em;padding:0 8px;border-radius:99px;background:#2a2a31;color:#d1d1d6}
.lc.ok i{background:#12301f;color:#6fdc9c}.lc.run i{background:#3a2412;color:#ffb27a}.lc.info i{background:#10223f;color:#9cc2ff}
.lc b{margin-top:5px;font-size:15px;color:#f5f5f7;line-height:1.35}.lc span{font-size:12.5px;color:var(--dmut);line-height:1.45}
.casesseg .sub{color:var(--mut)}
.casesseg .case{background:#fff;border:1px solid #e3e3e8;box-shadow:0 1px 2px rgba(0,0,0,.04),0 10px 30px -18px rgba(20,30,60,.25);color:var(--ink)}
.casesseg .case:hover{border-color:#b9c7e6}
.casesseg .scene{color:var(--mut)}.casesseg .case li{border-color:#e3e3e8;color:#3a3a3c;background:#f7f7f9}
.casesseg .st{background:#efeff4;color:#3a3a3c}.casesseg .st.ok{background:#e3f6ea;color:#137a3d}.casesseg .st.run{background:#fff1e5;color:#b4570f}.casesseg .st.info{background:#e8f0fe;color:#1d5fd1}
.casesseg .btn.line{color:var(--ink);border-color:var(--line)}.casesseg .btn.line:hover{background:#f0f0f3}
.chain{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:0;margin:16px 0 0;padding:0;counter-reset:c}
.chain li{position:relative;display:flex;align-items:center;font-size:12.5px;font-weight:600;color:#1d5fd1;background:#eef3fe;border:1px solid #d6e2fb;border-radius:8px;padding:2px 10px;margin:0 18px 6px 0}
.chain li::after{content:"";position:absolute;right:-14px;top:50%;width:10px;height:1.5px;background:#9db6ea}
.chain li:last-child{margin-right:0;color:#137a3d;background:#e9f7ef;border-color:#c9ecd6}.chain li:last-child::after{display:none}
.case.feat{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:34px;margin-top:48px;padding:32px 34px;text-align:left;
  background:linear-gradient(135deg,#fff 0,#f6f8ff 100%)!important;border-color:#d6e2fb!important}
.case.feat h3{font-size:30px}
.feat-r{border-left:1px solid #e3e8f5;padding-left:30px}.feat-r .mods-t{color:var(--mut)}
.feat-g{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.fm{display:flex;flex-direction:column;gap:4px;border:1px solid #e3e3e8;border-radius:14px;padding:12px 14px;background:#fff;transition:border-color .2s}
.fm:hover{border-color:var(--bl)}.fm b{font-size:16px}.fm span{display:flex;gap:14px}.fm a{font-size:13px;color:var(--bl)}.fm a:hover{text-decoration:underline}
.cw-h{display:flex;align-items:baseline;gap:14px;margin:44px 0 0;text-align:left}.cw-h b{font-size:20px}.cw-h span{font-size:14px;color:var(--mut)}
.casesseg .casewall{margin-top:16px}
.case .apps{margin:14px 0 20px;font-size:13.5px;color:var(--mut)}
@media (max-width:1180px){.case.feat{grid-template-columns:1fr}.feat-r{border-left:0;padding-left:0;border-top:1px solid #e3e8f5;padding-top:20px}.lc{min-width:0;max-width:none;flex:1 1 200px}}
@media (max-width:640px){.feat-g{grid-template-columns:1fr}.cw-h{flex-direction:column;gap:2px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}