.ig{--ig-rail:1180px;--ig-read:var(--container-read);--ig-anchor-offset:96px;padding:6.5rem 0 5rem;min-height:70vh;min-height:70dvh;position:relative}.ig::before,.ig::after{content:'';position:fixed;pointer-events:none;z-index:0;border-radius:50%}.ig::before{width:96vw;height:96vw;max-width:1400px;max-height:1400px;top:-40vw;left:50%;transform:translate(-50%,0);background:radial-gradient(closest-side,var(--cyan-a10),transparent)}.ig::after{width:88vw;height:88vw;max-width:1200px;max-height:1200px;bottom:-34vw;left:2%;opacity:.4;background:radial-gradient(closest-side,var(--violet-a16),transparent)}@keyframes igVeilCold{from{transform:translate(-50%,0) scale(1);opacity:1}to{transform:translate(-14%,26vh) scale(1.22);opacity:.45}}@keyframes igVeilWarm{from{transform:translate(0,6vh) scale(.85);opacity:.3}to{transform:translate(46vw,-30vh) scale(1.25);opacity:.9}}@supports (animation-timeline:scroll(root block)){@media 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.ic{width:var(--icon-ml);height:var(--icon-ml);stroke-width:2.4}.ig-card .ig-p,.ig-card .ig-list{max-width:none}.ig-card .ig-p{font-size:var(--fs-4);line-height:1.65}.ig-facts{margin:0 0 var(--sp-2);border:1px solid var(--line);border-radius:var(--r-panel);overflow:hidden}.ig-facts:last-child{margin-bottom:0}.ig-facts-row{display:grid;grid-template-columns:minmax(160px,240px) minmax(0,1fr);align-items:center;gap:var(--sp-2);padding:var(--sp-3);border-bottom:1px solid var(--line)}.ig-facts-row:last-child{border-bottom:none}.ig-facts dt{font-size:var(--fs-2);line-height:1.5;letter-spacing:.01em;color:var(--text-dim);margin:0}.ig-facts dd{margin:0;font-size:var(--fs-4);line-height:1.65;color:var(--text)}.ig-facts dd b{color:var(--text-hi);font-weight:600}.ig-facts dd .ig-sub{display:block;margin-top:5px;font-size:var(--fs-3);line-height:1.55;color:var(--text-dim)}.ig-steps{counter-reset:ig-step;margin:0 0 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var(--line);border-radius:var(--r-panel);background:radial-gradient(60% 60% at 47% 47%,var(--cyan-a06),transparent 70%),var(--bg-a55)}.ig-map::before{content:"";position:absolute;inset:-25%;z-index:-1;pointer-events:none;background:radial-gradient(36% 42% at 34% 36%,var(--cyan-a08),transparent 66%),radial-gradient(42% 38% at 68% 68%,var(--pure-white-a04),transparent 70%),radial-gradient(30% 34% at 58% 22%,var(--cyan-a05),transparent 72%)}.ig-map::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;border-radius:inherit;background:radial-gradient(74% 74% at 50% 47%,transparent 52%,var(--bg-a60) 100%)}.ig-map-svg{position:relative;z-index:1;display:block;width:100%;height:auto}.ig-map-dust circle{fill:var(--pure-white-a80);opacity:.16}.ig-map-dust circle:nth-child(3n+1){fill:var(--cyan-200)}.ig-map-lines path{fill:none;stroke:var(--pure-white-a12);stroke-width:1}.ig-map-trails path,.ig-map-pulses path{fill:none;stroke:var(--cyan);stroke-linecap:round;opacity:0}.ig-map-trails path{stroke-width:7;stroke-dasharray:26 100;stroke-dashoffset:26}.ig-map-pulses path{stroke-width:1.5;stroke-dasharray:11 100;stroke-dashoffset:11}.ig-map-nodes-glow circle{fill:var(--pure-white-a18);filter:blur(6px)}.ig-map-nodes circle{fill:var(--pure-white-a38);filter:blur(2.4px)}.ig-map-nodes circle:nth-child(2){filter:blur(1.7px)}.ig-map-nodes circle:nth-child(6){filter:blur(2.1px)}.ig-map-nodes circle:nth-child(4){filter:blur(3.1px)}.ig-map-glow-in{stop-color:var(--cyan);stop-opacity:.40}.ig-map-glow-mid{stop-color:var(--cyan);stop-opacity:.12}.ig-map-glow-out{stop-color:var(--cyan);stop-opacity:0}.ig-map-halo{fill:url(#igMapGlow)}.ig-map-halo--wide{opacity:.38}.ig-map-ring{fill:none;stroke:var(--cyan-a30);stroke-width:1;transform-origin:320px 178px;opacity:0}.ig-map-dot{fill:var(--cyan)}@media (prefers-reduced-motion:no-preference){.ig-map::before{animation:igMapDrift 52s ease-in-out infinite alternate}.ig-map-dust{animation:igDustDrift 64s ease-in-out infinite alternate}.ig-map-dust circle{animation:igDustFlicker 6s ease-in-out infinite}.ig-map-dust circle:nth-child(4n+1){animation-duration:5.2s;animation-delay:.4s}.ig-map-dust circle:nth-child(4n+2){animation-duration:7.1s;animation-delay:1.9s}.ig-map-dust circle:nth-child(4n+3){animation-duration:8.4s;animation-delay:3.2s}.ig-map-dust circle:nth-child(4n+4){animation-duration:6.3s;animation-delay:2.5s}.ig-map-halo{animation:igCorePulse 3.4s var(--ease-gentle,ease-in-out) infinite;transform-origin:320px 178px}.ig-map-halo--wide{animation:igCoreHaloWide 7.2s var(--ease-gentle,ease-in-out) infinite}.ig-map-ring{animation:igCoreRing 7s ease-out infinite}.ig-map-ring--late{animation-delay:3.5s}.ig-map-trails path{animation:igMapTrail 5.4s var(--ease-gentle,ease-in-out) infinite}.ig-map-pulses path{animation:igMapPulse 5.4s var(--ease-gentle,ease-in-out) infinite}.ig-map-trails path:nth-child(1),.ig-map-pulses path:nth-child(1){animation-duration:5.4s;animation-delay:0s}.ig-map-trails path:nth-child(2),.ig-map-pulses path:nth-child(2){animation-duration:4.6s;animation-delay:1.7s}.ig-map-trails path:nth-child(3),.ig-map-pulses path:nth-child(3){animation-duration:6.1s;animation-delay:.8s}.ig-map-trails path:nth-child(4),.ig-map-pulses path:nth-child(4){animation-duration:5.9s;animation-delay:2.6s}.ig-map-trails path:nth-child(5),.ig-map-pulses path:nth-child(5){animation-duration:4.9s;animation-delay:3.4s}.ig-map-trails path:nth-child(6),.ig-map-pulses path:nth-child(6){animation-duration:6.4s;animation-delay:1.2s}}@keyframes igMapDrift{from{transform:translate3d(-2%,-1%,0) scale(1)}to{transform:translate3d(2%,1.5%,0) scale(1.08)}}@keyframes igDustDrift{from{transform:translate(-5px,3px)}to{transform:translate(6px,-4px)}}@keyframes igDustFlicker{0%,100%{opacity:.09}50%{opacity:.32}}@keyframes igCorePulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(1.18);opacity:.45}}@keyframes igCoreHaloWide{0%,100%{transform:scale(1);opacity:.34}50%{transform:scale(1.16);opacity:.14}}@keyframes igCoreRing{0%{transform:scale(.4);opacity:0}14%{opacity:.5}100%{transform:scale(3.2);opacity:0}}@keyframes igMapTrail{0%{stroke-dashoffset:26;opacity:0}12%{opacity:.16}55%{opacity:.1}78%{opacity:0}100%{stroke-dashoffset:-85;opacity:0}}@keyframes igMapPulse{0%{stroke-dashoffset:11;opacity:0}10%{opacity:.85}55%{opacity:.5}78%{opacity:0}100%{stroke-dashoffset:-100;opacity:0}}@media (max-width:620px){.ig-map{padding:var(--sp-2)}.ig-map-dust circle:nth-child(2n){display:none}}.ig-callout{position:relative;margin-top:var(--sp-6);padding:var(--sp-5);border:1px solid var(--violet-a25);border-radius:var(--r-xl);background:radial-gradient(120% 140% at 0% 0%,var(--violet-a10),transparent 58%),var(--glass);overflow:hidden}.ig-callout .ig-p{max-width:var(--ig-read);font-size:var(--fs-5);line-height:1.72;color:var(--text)}.ig-callout .ig-h2{margin-bottom:var(--sp-3);text-align:center}.ig-signrow{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--sp-3);margin-top:var(--sp-4);padding-top:var(--sp-3);border-top:1px solid var(--pure-white-a06)}.ig-sign{margin:0;font-size:var(--fs-3);letter-spacing:.02em;color:var(--text-dim)}.ig-sign b{color:var(--text-soft);font-weight:600}.ig-seal{display:inline-flex;align-items:center;gap:12px;padding:10px 16px 10px 12px;border:1px solid var(--violet-a25);border-radius:var(--r-md);background:var(--violet-a06)}.ig-seal .ic{box-sizing:border-box;width:var(--icon-ml);height:var(--icon-ml);padding:2px;flex-shrink:0;border:1px solid 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var(--line);border-radius:var(--r-panel);background:var(--glass);text-decoration:none;transition:border-color var(--dur-base),background var(--dur-base)}.ig-sibling:hover{border-color:var(--cyan-a18);background:var(--glass-2)}.ig-sibling-title{display:block;font-size:var(--fs-4);font-weight:600;color:var(--text-hi);margin-bottom:4px}.ig-sibling-text{display:block;font-size:var(--fs-2);line-height:1.55;color:var(--text-dim)}@media (max-width:1100px){.ig-body{grid-template-columns:minmax(0,1fr);gap:var(--sp-4)}.ig-toc{position:static;padding:var(--sp-3);border:1px solid var(--line);border-radius:var(--r-panel);background:var(--glass)}.ig-toc ol{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:0 var(--sp-3)}.ig-toc a{align-items:center;min-height:var(--tap-min);padding:6px 0}.ig-toc a.is-current::before{left:-12px;top:50%;bottom:auto;width:4px;height:4px;border-radius:50%;transform:translateY(-50%)}.ig-toc a::before{padding-top:0}}@media (max-width:760px){.ig{padding:5.5rem 0 4rem}.ig-hero{max-width:none}.ig-inner{padding:0 var(--sp-2)}.ig-sec{padding:var(--sp-3);border-radius:var(--r-panel)}.ig-facts-row{grid-template-columns:minmax(0,1fr);align-items:start;gap:6px;padding:var(--sp-2)}.ig-card{padding:var(--sp-2)}.ig-callout{padding:var(--sp-3)}.ig-step{padding-left:calc(var(--sp-4) + 10px)}.ig-step::before{width:30px;height:30px;font-size:var(--fs-1)}.ig-step::after{left:15px;top:36px}.ig-btn{min-height:var(--tap-min)}}@media (max-width:480px){.ig-quick{flex-direction:column;align-items:stretch}.ig-quick li{justify-content:flex-start}.ig-actions .ig-btn{flex:1 1 100%;justify-content:center}}@media print{.ig::before,.ig-toc,.ig-actions,.ig-siblings{display:none}.ig-body{grid-template-columns:minmax(0,1fr)}}