:root{--ink:#14110f;--ink-2:#2b2622;--ink-3:#5d554d;--ink-4:#8d8479;--paper:#fbf7f0;--paper-2:#f4ede1;--paper-3:#e9dfd0;--red:#c8102e;--red-bright:#e5342c;--red-deep:#8c0a20;--gold:#c9a227;--gold-lite:#e9c85c;--jade:#2e6f5e;--jade-lite:#62a78f;--celadon:#a9c6b7;--line:#14110f1f;--line-soft:#14110f12;--serif:"Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;--sans:"Inter", -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--mono:"JetBrains Mono", "SFMono-Regular", Consolas, monospace;--shell:1180px;--ease:cubic-bezier(.22, 1, .36, 1)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-size:16px;line-height:1.65;overflow-x:hidden}h1,h2,h3,h4{letter-spacing:-.02em;margin:0;font-weight:700;line-height:1.15}p{margin:0}a{color:inherit;text-decoration:none}.shell{width:min(var(--shell), calc(100% - 48px));margin-inline:auto}.section{padding:108px 0;position:relative}.section--tight{padding:84px 0}.section--paper2{background:var(--paper-2)}.section--ink{background:var(--ink);color:var(--paper)}.rule{background:linear-gradient(90deg, transparent, var(--line), transparent);border:0;height:1px;margin:0}.eyebrow{letter-spacing:.18em;text-transform:uppercase;color:var(--red);align-items:center;gap:10px;font-size:11px;font-weight:700;display:inline-flex}.eyebrow:before{content:"";background:var(--red);width:22px;height:1px;display:block}.section--ink .eyebrow{color:var(--gold-lite)}.section--ink .eyebrow:before{background:var(--gold-lite)}.sec-head{max-width:760px;margin-bottom:52px}.sec-head h2{font-family:var(--serif);margin:18px 0 16px;font-size:clamp(30px,4vw,46px);font-weight:900}.sec-head h2 .cn{color:var(--red);margin-right:12px}.section--ink .sec-head h2 .cn{color:var(--gold)}.sec-head p{color:var(--ink-3);max-width:66ch;font-size:17px}.section--ink .sec-head p{color:#fbf7f0a8}.reveal{opacity:0;transition:opacity .85s var(--ease), transform .85s var(--ease);transition-delay:var(--d,0s);transform:translateY(26px)}.reveal.is-in{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transition:none;transform:none}*,:before,:after{animation-duration:.001ms!important;animation-iteration-count:1!important}}.nav{z-index:60;transition:background .4s var(--ease), padding .4s var(--ease), border-color .4s;border-bottom:1px solid #0000;padding:18px 0;position:fixed;inset:0 0 auto}.nav.is-stuck{-webkit-backdrop-filter:blur(14px)saturate(1.3);backdrop-filter:blur(14px)saturate(1.3);border-bottom-color:var(--line);background:#fbf7f0db;padding:11px 0}.nav__in{justify-content:space-between;align-items:center;gap:24px;display:flex}.brand{align-items:center;gap:12px;display:flex}.chop{background:linear-gradient(160deg, var(--red-bright), var(--red-deep));color:#fff;width:34px;height:34px;font-family:var(--serif);border-radius:6px;flex:none;place-items:center;font-size:17px;font-weight:900;display:grid;box-shadow:0 4px 14px #c8102e52}.brand__txt{flex-direction:column;line-height:1.15;display:flex}.brand__cn{font-family:var(--serif);letter-spacing:.06em;font-size:15px;font-weight:900}.brand__en{letter-spacing:.16em;text-transform:uppercase;color:var(--ink-4);font-size:10px;font-weight:600}.nav__links{align-items:center;gap:28px;display:flex}.nav__links a{color:var(--ink-3);padding-bottom:2px;font-size:13.5px;font-weight:500;transition:color .25s;position:relative}.nav__links a:after{content:"";background:var(--red);height:1px;transition:right .35s var(--ease);position:absolute;bottom:0;left:0;right:100%}.nav__links a:hover{color:var(--ink)}.nav__links a:hover:after{right:0}.btn{letter-spacing:.01em;cursor:pointer;transition:transform .3s var(--ease), box-shadow .3s var(--ease), background .3s, color .3s, border-color .3s;border:1px solid #0000;border-radius:999px;align-items:center;gap:9px;padding:12px 22px;font-size:14px;font-weight:600;display:inline-flex}.btn--red{background:linear-gradient(140deg, var(--red-bright), var(--red));color:#fff;box-shadow:0 8px 24px -8px #c8102ea6}.btn--red:hover{transform:translateY(-2px);box-shadow:0 14px 32px -10px #c8102ebf}.btn--ghost{color:var(--paper);border-color:#fbf7f047}.btn--ghost:hover{border-color:var(--gold);color:var(--gold-lite);transform:translateY(-2px)}.btn--outline{border-color:var(--line);color:var(--ink);background:0 0}.btn--outline:hover{border-color:var(--ink);transform:translateY(-2px)}.btn__arrow{transition:transform .3s var(--ease)}.btn:hover .btn__arrow{transform:translate(3px)}.hero{background:var(--ink);color:var(--paper);isolation:isolate;padding:168px 0 96px;position:relative;overflow:hidden}.hero__glow{filter:blur(90px);z-index:0;pointer-events:none;border-radius:50%;position:absolute}.hero__glow--red{background:radial-gradient(circle,#c8102e80,#0000 68%);width:640px;height:640px;animation:22s ease-in-out infinite drift1;top:-220px;right:-140px}.hero__glow--gold{background:radial-gradient(circle,#c9a22752,#0000 70%);width:520px;height:520px;animation:27s ease-in-out infinite drift2;bottom:-240px;left:-120px}.hero__glow--jade{background:radial-gradient(circle,#2e6f5e57,#0000 70%);width:420px;height:420px;animation:31s ease-in-out infinite reverse drift1;top:44%;left:40%}@keyframes drift1{0%,to{transform:translate(0,0)scale(1)}50%{transform:translate(-42px,46px)scale(1.1)}}@keyframes drift2{0%,to{transform:translate(0,0)scale(1.05)}50%{transform:translate(54px,-38px)scale(.94)}}.hero__grid-bg{z-index:0;pointer-events:none;background-image:linear-gradient(#fbf7f00b 1px,#0000 1px),linear-gradient(90deg,#fbf7f00b 1px,#0000 1px);background-size:68px 68px;position:absolute;inset:0;-webkit-mask-image:radial-gradient(90% 70% at 50% 40%,#000 30%,#0000 100%);mask-image:radial-gradient(90% 70% at 50% 40%,#000 30%,#0000 100%)}.hero__in{z-index:2;grid-template-columns:minmax(0,1.03fr) minmax(0,.97fr);align-items:center;gap:64px;display:grid;position:relative}.hero__badge{color:#fbf7f0c7;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#fbf7f00d;border:1px solid #fbf7f029;border-radius:999px;align-items:center;gap:10px;padding:7px 14px 7px 7px;font-size:12px;font-weight:500;display:inline-flex}.hero__badge b{background:var(--red);color:#fff;letter-spacing:.12em;text-transform:uppercase;border-radius:999px;padding:4px 9px;font-size:10px;font-weight:700}.hero h1{font-family:var(--serif);letter-spacing:-.03em;margin:26px 0 0;font-size:clamp(34px,4.15vw,56px);font-weight:900;line-height:1.1}.hero h1 .line{padding-bottom:.06em;display:block;overflow:hidden}.hero h1 .line>span{animation:lineUp 1.05s var(--ease) forwards;animation-delay:var(--d,0s);display:block;transform:translateY(105%)}@keyframes lineUp{to{transform:translateY(0)}}.grad-red{background:linear-gradient(96deg, var(--red-bright) 0%, var(--gold-lite) 55%, var(--jade-lite) 100%);color:#0000;-webkit-background-clip:text;background-clip:text}.hero__sub{color:#fbf7f0ad;opacity:0;max-width:52ch;animation:fadeUp .9s var(--ease) .85s forwards;margin-top:24px;font-size:17.5px;line-height:1.7}.hero__sub b{color:var(--paper);font-weight:600}@keyframes fadeUp{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}.hero__cta{opacity:0;animation:fadeUp .9s var(--ease) 1s forwards;flex-wrap:wrap;gap:14px;margin-top:34px;display:flex}.hero__stats{opacity:0;animation:fadeUp .9s var(--ease) 1.15s forwards;border-top:1px solid #fbf7f01f;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:52px;padding-top:30px;display:grid}.stat__n{font-family:var(--serif);color:var(--gold-lite);letter-spacing:-.02em;font-size:32px;font-weight:900;line-height:1}.stat__n sup{color:var(--red-bright);margin-left:2px;font-size:.5em}.stat__l{color:#fbf7f08c;margin-top:8px;font-size:12px;line-height:1.45}.loop{place-items:center;display:grid;position:relative}.loop svg{width:100%;max-width:470px;height:auto;overflow:visible}.loop__ring-rot{transform-origin:240px 240px;animation:46s linear infinite spin}.loop__ring-rot--rev{animation:62s linear infinite reverse spin}@keyframes spin{to{transform:rotate(360deg)}}.loop__arc{fill:none;stroke-width:3px;stroke-linecap:round;stroke-dasharray:250;stroke-dashoffset:250px;animation:draw 1.4s var(--ease) forwards;animation-delay:var(--d,0s)}@keyframes draw{to{stroke-dashoffset:0}}.loop__node{opacity:0;animation:nodeIn .7s var(--ease) forwards;animation-delay:var(--d,0s)}@keyframes nodeIn{0%{opacity:0}to{opacity:1}}.loop__node-pulse{animation:3.6s ease-in-out infinite pulse;animation-delay:var(--d,0s)}@keyframes pulse{0%,to{opacity:.32;transform:scale(1)}50%{opacity:0;transform:scale(1.75)}}.loop__cn{font-family:var(--serif);fill:#fff;font-size:15px;font-weight:900}.loop__en{font-family:var(--sans);letter-spacing:.1em;font-size:9px;font-weight:700}.loop__hub-cn{font-family:var(--serif);fill:var(--gold-lite);letter-spacing:.04em;font-size:21px;font-weight:900}.loop__hub-en{font-family:var(--sans);letter-spacing:.2em;fill:#fbf7f080;font-size:8px;font-weight:700}.loop__hub-core{transform-origin:240px 240px;animation:4.5s ease-in-out infinite hubPulse}@keyframes hubPulse{0%,to{opacity:.92;transform:scale(1)}50%{opacity:1;transform:scale(1.035)}}.loop__spoke{stroke:#fbf7f026;stroke-width:1px;stroke-dasharray:3 6}.flow-dot{filter:drop-shadow(0 0 5px)}.loop__cap{text-align:center;letter-spacing:.16em;text-transform:uppercase;color:#fbf7f066;margin-top:20px;font-size:11px;font-weight:600}.marquee{z-index:2;border-top:1px solid #fbf7f01a;border-bottom:1px solid #fbf7f01a;margin-top:76px;padding:16px 0;position:relative;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#0000,#000 12% 88%,#0000);mask-image:linear-gradient(90deg,#0000,#000 12% 88%,#0000)}.marquee__track{gap:14px;width:max-content;animation:46s linear infinite slide;display:flex}.marquee:hover .marquee__track{animation-play-state:paused}@keyframes slide{to{transform:translate(-50%)}}.tag{font-family:var(--mono);color:#fbf7f099;white-space:nowrap;background:#fbf7f008;border:1px solid #fbf7f021;border-radius:6px;flex:none;align-items:center;gap:7px;padding:6px 13px;font-size:11.5px;display:inline-flex}.tag i{background:var(--gold);border-radius:50%;flex:none;width:5px;height:5px}.tag--red i{background:var(--red-bright)}.tag--jade i{background:var(--jade-lite)}.prob-grid{background:var(--line);border:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;display:grid}.prob{background:var(--paper);transition:background .35s var(--ease);padding:34px 30px}.prob:hover{background:var(--paper-2)}.prob__n{font-family:var(--mono);color:var(--red);letter-spacing:.16em;font-size:11px;font-weight:600}.prob h3{font-size:18px;font-family:var(--serif);margin:14px 0 10px;font-weight:700}.prob p{color:var(--ink-3);font-size:14.5px;line-height:1.7}.layers{gap:14px;display:grid}.layer{border:1px solid var(--line);background:var(--paper);transition:transform .4s var(--ease), box-shadow .4s var(--ease);border-radius:4px;grid-template-columns:138px minmax(0,1fr) minmax(0,290px);align-items:start;gap:28px;padding:28px 30px;display:grid;position:relative;overflow:hidden}.layer:before{content:"";background:var(--accent,var(--red));transform-origin:top;width:3px;transition:transform .5s var(--ease);position:absolute;top:0;bottom:0;left:0;transform:scaleY(0)}.layer:hover{transform:translate(6px);box-shadow:0 18px 46px -28px #14110f66}.layer:hover:before{transform:scaleY(1)}.layer__id{font-family:var(--mono);letter-spacing:.12em;color:var(--accent,var(--red));text-transform:uppercase;font-size:11px;font-weight:600}.layer__cn{font-family:var(--serif);margin-top:8px;font-size:22px;font-weight:900;display:block}.layer h3{margin-bottom:9px;font-size:19px}.layer p{color:var(--ink-3);font-size:14.5px;line-height:1.7}.layer__meta{flex-direction:column;gap:9px;margin:0;display:flex}.kv{align-items:baseline;gap:10px;font-size:12.5px;display:flex}.kv dt{color:var(--ink-4);font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;flex:none;width:76px;font-size:10.5px}.kv dd{color:var(--ink-2);margin:0;font-weight:500}.meta-wrap{grid-template-columns:minmax(0,1fr) minmax(0,420px);align-items:start;gap:52px;display:grid}.facets{background:#fbf7f01a;border:1px solid #fbf7f01a;gap:1px;display:grid}.facet{background:var(--ink);padding:22px 24px;transition:background .3s}.facet:hover{background:#1c1815}.facet__top{justify-content:space-between;align-items:center;gap:16px;display:flex}.facet__key{font-family:var(--mono);color:var(--gold-lite);font-size:13px;font-weight:600}.facet__req{letter-spacing:.14em;text-transform:uppercase;border-radius:3px;flex:none;padding:3px 8px;font-size:9.5px;font-weight:700}.facet__req--req{color:#ff8b84;background:#c8102e2e;border:1px solid #e5342c59}.facet__req--opt{color:#fbf7f073;background:#fbf7f00f;border:1px solid #fbf7f01f}.facet p{color:#fbf7f099;margin-top:8px;font-size:13.5px;line-height:1.65}.facet__vals{flex-wrap:wrap;gap:6px;margin-top:12px;display:flex}.chip{font-family:var(--mono);color:#fbf7f0b8;background:#fbf7f00f;border:1px solid #fbf7f01a;border-radius:3px;padding:3px 8px;font-size:10.5px}.confidence{gap:12px;display:grid}.conf{background:#fbf7f008;border:1px solid #fbf7f01f;border-radius:4px;grid-template-columns:46px minmax(0,1fr);align-items:center;gap:16px;padding:16px 18px;transition:border-color .35s,background .35s;display:grid}.conf:hover{background:#fbf7f00f;border-color:#e9c85c66}.conf__badge{width:46px;height:46px;font-family:var(--serif);color:#fff;border-radius:4px;place-items:center;font-size:20px;font-weight:900;display:grid}.conf h4{margin-bottom:4px;font-size:14.5px}.conf p{color:#fbf7f08c;font-size:12.5px;line-height:1.6}.conf code{font-family:var(--mono);color:var(--gold-lite);font-size:11px}.ret-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;display:grid}.ret{border:1px solid var(--line);background:var(--paper);transition:transform .4s var(--ease), box-shadow .4s var(--ease);border-radius:4px;padding:30px 28px}.ret:hover{transform:translateY(-5px);box-shadow:0 22px 50px -30px #14110f73}.ret__ico{background:linear-gradient(150deg, var(--paper-2), var(--paper-3));border:1px solid var(--line);border-radius:4px;place-items:center;width:42px;height:42px;margin-bottom:18px;display:grid}.ret h3{font-size:17px;font-family:var(--serif);margin-bottom:10px;font-weight:700}.ret p{color:var(--ink-3);font-size:14px;line-height:1.7}.ret ul{gap:8px;margin:14px 0 0;padding:0;list-style:none;display:grid}.ret li{color:var(--ink-2);padding-left:18px;font-size:13px;line-height:1.6;position:relative}.ret li:before{content:"";background:var(--red);width:7px;height:1px;position:absolute;top:9px;left:0}.ret li b{font-family:var(--mono);color:var(--jade);font-size:11.5px;font-weight:600}.we{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);align-items:start;gap:44px;display:grid}.we__steps{gap:0;display:grid}.we__step{cursor:pointer;text-align:left;font:inherit;color:inherit;background:0 0;border:0;grid-template-columns:34px minmax(0,1fr);gap:18px;padding-bottom:26px;display:grid;position:relative}.we__step:not(:last-child):before{content:"";background:var(--line);width:1px;position:absolute;top:34px;bottom:0;left:16px}.we__dot{border:1px solid var(--line);background:var(--paper);width:33px;height:33px;font-family:var(--mono);color:var(--ink-4);z-index:1;transition:all .35s var(--ease);border-radius:50%;place-items:center;font-size:12px;font-weight:600;display:grid}.we__step.is-on .we__dot{background:var(--red);color:#fff;border-color:var(--red);box-shadow:0 0 0 4px #c8102e21}.we__step h4{color:var(--ink-4);margin-bottom:5px;font-size:16px;transition:color .3s}.we__step.is-on h4{color:var(--ink)}.we__step p{color:var(--ink-3);font-size:13.5px;line-height:1.65}.code{background:#16130f;border:1px solid #fbf7f01c;border-radius:6px;position:sticky;top:92px;overflow:hidden;box-shadow:0 30px 70px -40px #14110fa6}.code__bar{background:#fbf7f008;border-bottom:1px solid #fbf7f017;align-items:center;gap:10px;padding:11px 16px;display:flex}.code__dots{gap:6px;display:flex}.code__dots i{border-radius:50%;width:9px;height:9px;display:block}.code__path{font-family:var(--mono);color:#fbf7f080;margin-left:4px;font-size:11.5px}.code__lang{font-family:var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-left:auto;font-size:10px}.code pre{min-height:430px;font-family:var(--mono);color:#fbf7f0d1;margin:0;padding:22px 20px;font-size:12.2px;line-height:1.8;overflow-x:auto}.code pre::-webkit-scrollbar{height:7px}.code pre::-webkit-scrollbar-thumb{background:#fbf7f029;border-radius:4px}.code__fade{animation:codeIn .45s var(--ease)}@keyframes codeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.t-key{color:#7fc7ff}.t-str{color:#b7e08a}.t-num{color:#f0b46a}.t-com{color:#fbf7f057;font-style:italic}.t-hd{color:var(--gold-lite);font-weight:600}.t-red{color:#ff8b84}.t-cn{color:#fff;font-family:var(--serif)}.contam{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-bottom:24px;display:grid}.lane{border:1px solid var(--line);background:var(--paper);border-radius:4px;overflow:hidden}.lane__hd{border-bottom:1px solid var(--line);background:linear-gradient(180deg, var(--paper-2), var(--paper));align-items:center;gap:13px;padding:20px 26px;display:flex}.lane__mark{width:36px;height:36px;font-family:var(--serif);color:#fff;border-radius:5px;flex:none;place-items:center;font-size:17px;font-weight:900;display:grid}.lane__hd h3{font-size:16.5px}.lane__hd span{font-size:11px;font-family:var(--mono);color:var(--ink-4);letter-spacing:.06em}.lane__body{padding:24px 26px}.lane__q{font-family:var(--serif);color:var(--ink);background:var(--paper-2);border-left:3px solid var(--accent,var(--red));border-radius:4px;margin-bottom:18px;padding:14px 16px;font-size:16px;font-weight:700;line-height:1.5}.lane__body ul{gap:11px;margin:0;padding:0;list-style:none;display:grid}.lane__body li{color:var(--ink-3);padding-left:20px;font-size:13.5px;line-height:1.65;position:relative}.lane__body li:before{content:"→";color:var(--accent,var(--red));font-size:12px;position:absolute;left:0}.lane__body li b{color:var(--ink);font-weight:600}.bridge{border:1px dashed var(--line);background:var(--paper);border-radius:4px;grid-template-columns:44px minmax(0,1fr);align-items:start;gap:20px;padding:26px 30px;display:grid}.bridge__ico{background:var(--ink);border-radius:5px;place-items:center;width:44px;height:44px;display:grid}.bridge h4{margin-bottom:8px;font-size:16px}.bridge p{color:var(--ink-3);font-size:14.5px;line-height:1.72}.bridge p+p{margin-top:10px}.bridge code{font-family:var(--mono);background:var(--paper-2);color:var(--red-deep);border:1px solid var(--line-soft);border-radius:3px;padding:1px 6px;font-size:12.5px}.maint{background:#fbf7f01a;border:1px solid #fbf7f01a;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;display:grid}.rule-card{background:var(--ink);padding:28px 24px;transition:background .35s}.rule-card:hover{background:#1d1916}.rule-card__n{font-family:var(--serif);color:#fbf7f024;font-size:30px;font-weight:900;line-height:1;transition:color .35s}.rule-card:hover .rule-card__n{color:var(--red-bright)}.rule-card h3{margin:14px 0 9px;font-size:15.5px}.rule-card p{color:#fbf7f08c;font-size:13px;line-height:1.68}.mile{grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;display:grid}.m{border:1px solid var(--line);background:var(--paper);transition:transform .4s var(--ease), border-color .4s, box-shadow .4s var(--ease);border-radius:4px;padding:24px 20px}.m:hover{border-color:var(--red);transform:translateY(-6px);box-shadow:0 20px 44px -30px #c8102e80}.m__n{font-family:var(--mono);letter-spacing:.16em;color:var(--red);font-size:10.5px;font-weight:600}.m h3{margin:12px 0 8px;font-size:15px;line-height:1.35}.m p{color:var(--ink-3);font-size:12.8px;line-height:1.6}.m__out{border-top:1px dashed var(--line);font-family:var(--mono);color:var(--ink-4);letter-spacing:.04em;margin-top:14px;padding-top:12px;font-size:10.5px}.cta-band{background:linear-gradient(120deg, var(--red-deep), var(--red) 46%, #a50f26 100%);color:#fff;border-radius:6px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:36px;margin-top:62px;padding:54px 56px;display:grid;position:relative;overflow:hidden}.cta-band:after{content:"循环";font-family:var(--serif);color:#ffffff12;pointer-events:none;letter-spacing:.05em;font-size:168px;font-weight:900;line-height:1;position:absolute;bottom:-52px;right:26px}.cta-band h2{font-family:var(--serif);margin-bottom:12px;font-size:clamp(26px,3.2vw,38px);font-weight:900}.cta-band p{color:#ffffffd1;max-width:56ch;font-size:16px}.btn--gold{background:var(--gold-lite);color:var(--ink);z-index:1;position:relative}.btn--gold:hover{background:#fff;transform:translateY(-2px)}.footer{background:var(--ink);color:#fbf7f09e;position:relative;overflow:hidden}.footer__seam{background:linear-gradient(90deg, var(--red) 0%, var(--red) 34%, var(--gold) 34%, var(--gold) 67%, var(--jade) 67%);height:3px}.footer__body{z-index:1;padding-top:74px;position:relative}.footer__top{grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:48px;padding-bottom:52px;display:grid}.footer .brand__cn{color:var(--paper)}.footer .brand__en{color:#fbf7f066}.footer__blurb{max-width:40ch;margin-top:20px;font-size:14px;line-height:1.75}.footer__mail{color:var(--gold-lite);border-bottom:1px solid #0000;align-items:center;gap:9px;margin-top:20px;font-size:14px;font-weight:500;transition:border-color .3s;display:inline-flex}.footer__mail:hover{border-bottom-color:var(--gold-lite)}.footer__col h4{letter-spacing:.16em;text-transform:uppercase;color:#fbf7f061;margin-bottom:18px;font-size:11px;font-weight:700}.footer__col ul{gap:11px;margin:0;padding:0;list-style:none;display:grid}.footer__col li{font-size:13.8px}.footer__col a{transition:color .25s}.footer__col a:hover{color:var(--gold-lite)}.footer__col .cnl{font-family:var(--serif);color:#fbf7f04d;margin-left:6px;font-size:12px}.footer__bar{color:#fbf7f061;border-top:1px solid #fbf7f01a;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;padding:22px 0 28px;font-size:12.5px;display:flex}.footer__bar .dot{vertical-align:middle;background:#fbf7f047;border-radius:50%;width:3px;height:3px;margin:0 10px;display:inline-block}.footer__legal{gap:22px;display:flex}.footer__legal a:hover{color:#fbf7f0b8}.footer__chop{pointer-events:none;z-index:0;border:3px solid #c8102e4d;border-radius:8px;place-items:center;width:124px;height:124px;display:grid;position:absolute;top:84px;right:4%;transform:rotate(-7deg)}.footer__chop span{font-family:var(--serif);color:#c8102e52;text-align:center;letter-spacing:.04em;font-size:44px;font-weight:900;line-height:1.02}@media (width<=1080px){.hero__in{grid-template-columns:1fr;gap:56px}.meta-wrap,.we{grid-template-columns:1fr;gap:34px}.code{position:static}.maint,.mile{grid-template-columns:repeat(2,minmax(0,1fr))}.footer__top{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px}.footer__chop{display:none}}@media (width<=780px){.section{padding:76px 0}.nav__links{display:none}.hero{padding:128px 0 68px}.prob-grid,.ret-grid,.contam{grid-template-columns:1fr}.layer{grid-template-columns:1fr;gap:16px}.maint,.mile{grid-template-columns:1fr}.cta-band{grid-template-columns:1fr;padding:38px 30px}.hero__stats{grid-template-columns:1fr;gap:18px}.footer__top,.bridge{grid-template-columns:1fr}.shell{width:calc(100% - 36px)}}.nav:not(.is-stuck) .brand__cn{color:var(--paper)}.nav:not(.is-stuck) .brand__en{color:#fbf7f073}.nav:not(.is-stuck) .nav__links a{color:#fbf7f0a8}.nav:not(.is-stuck) .nav__links a:hover{color:var(--paper)}.nav:not(.is-stuck) .nav__links a:after{background:var(--gold-lite)}.legend{opacity:0;animation:fadeUp .9s var(--ease) 1.35s forwards;background:#fbf7f01a;border:1px solid #fbf7f01a;border-radius:4px;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;display:grid;overflow:hidden}.legend__i{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#14110fb8;align-items:flex-start;gap:11px;padding:16px 18px;transition:background .35s;display:flex}.legend__i:hover{background:#231e1adb}.legend__dot{border-radius:50%;flex:none;width:8px;height:8px;margin-top:6px}.legend__i b{color:var(--paper);font-size:13px;font-weight:600;line-height:1.35;display:block}.legend__i span:last-child{font-family:var(--mono);color:#fbf7f06b;letter-spacing:.02em;margin-top:4px;font-size:10.5px;display:block}@media (width<=1080px){.legend{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=560px){.legend{grid-template-columns:1fr}}
