:root{color-scheme:dark;--bg:#050506;--panel:#101014;--panel2:#17171c;--text:#f5f4f1;--muted:#b8b1aa;--line:rgba(255,255,255,.14);--red:#f41f26;--red2:#ff6a56;--warm:#f5d0a4;--blue:#87a6ff;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 80% 0,rgba(244,31,38,.28),transparent 30rem),linear-gradient(180deg,#030303,#0b0909 42%,#08080a);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65;letter-spacing:0}a{color:inherit;text-decoration:none}p{margin:0;color:var(--muted)}img{display:block;max-width:100%;height:auto}.pulse-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:22px;padding:16px clamp(18px,4vw,42px);background:rgba(5,5,6,.78);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.pulse-brand{display:flex;align-items:center;gap:12px;min-width:210px}.pulse-brand strong{display:block;font-size:17px}.pulse-brand small{display:block;color:var(--muted);font-size:12px}.mark{width:40px;height:40px;border-radius:50%;background:conic-gradient(from 20deg,var(--red),#111 34%,var(--red2) 62%,#111 80%,var(--red));box-shadow:0 0 28px rgba(244,31,38,.55);position:relative}.mark:after{content:"";position:absolute;inset:10px;border:2px solid #050506;border-radius:50%;background:#08080a}.pulse-nav{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.pulse-nav a,.menu-button{border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);border-radius:999px;padding:9px 13px;font-size:14px}.pulse-nav a:hover,.menu-button:hover{border-color:rgba(244,31,38,.75);background:rgba(244,31,38,.12)}.menu-button{display:none}.velocity-cover{min-height:calc(100svh - 76px);display:grid;grid-template-columns:minmax(0,1fr);position:relative;overflow:hidden;border-bottom:1px solid var(--line)}.cover-copy{position:relative;z-index:2;width:min(760px,calc(100vw - 36px));padding:clamp(70px,12vh,138px) 0 70px clamp(18px,7vw,90px)}.cover-copy h1{font-size:clamp(40px,7vw,86px);line-height:.98;margin:14px 0 20px;max-width:720px}.cover-copy p{font-size:18px;max-width:610px}.cover-visual{position:absolute;inset:0;margin:0}.cover-visual:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,5,6,.96),rgba(5,5,6,.68) 32%,rgba(5,5,6,.05) 66%,rgba(5,5,6,.12));z-index:1}.cover-visual img{width:100%;height:100%;object-fit:cover;object-position:center}.micro{display:inline-flex;align-items:center;gap:8px;color:var(--warm);font-size:12px;font-weight:800;letter-spacing:0;text-transform:uppercase}.micro:before{content:"";width:32px;height:2px;background:var(--red);box-shadow:0 0 18px var(--red)}.cover-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.primary-link,.secondary-link{display:inline-flex;min-height:46px;align-items:center;justify-content:center;border-radius:999px;padding:12px 18px;font-weight:800}.primary-link{background:var(--red);color:#fff;box-shadow:0 10px 30px rgba(244,31,38,.35)}.secondary-link{border:1px solid var(--line);background:rgba(255,255,255,.08)}.quick-rail,.platform-lanes,.checkpoint-board,.scenario-strip,.article-deck,.faq-panel,.related,.content-grid,.compare-panel,.device-matrix,.note-band,.prose,.long-article,.inner-hero{width:min(var(--max),calc(100vw - 36px));margin:0 auto}.quick-rail{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);transform:translateY(-28px);position:relative;z-index:4}.quick-rail a{background:rgba(16,16,20,.94);padding:20px;min-height:118px}.quick-rail strong{display:block;color:#fff;font-size:18px;margin-bottom:8px}.quick-rail span{color:var(--muted);font-size:14px}.platform-lanes,.checkpoint-board,.scenario-strip,.article-deck,.faq-panel,.content-grid,.compare-panel,.device-matrix,.note-band,.prose,.long-article{padding:54px 0}.section-head{display:grid;grid-template-columns:minmax(160px,260px) minmax(0,1fr);gap:28px;align-items:end;margin-bottom:28px}.section-head h2{font-size:clamp(28px,4vw,48px);line-height:1.05;margin:0}.section-head p{font-size:16px;max-width:720px}.lane-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.lane-card,.check-grid article,.article-grid article,.content-grid article,.compare-panel article,.device-matrix div,.note-band,.prose,.related,.long-article{border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.035));border-radius:8px}.lane-card{padding:24px;min-height:240px}.lane-card i{display:block;width:64px;height:64px;border:1px solid rgba(244,31,38,.7);border-radius:50%;background:radial-gradient(circle,var(--red) 0 14%,transparent 16% 34%,rgba(244,31,38,.2) 36% 60%,transparent 62%);box-shadow:0 0 28px rgba(244,31,38,.28);margin-bottom:28px}.lane-card h3,.check-grid h3,.article-grid h3,.content-grid h2,.compare-panel h2,.note-band h2,.related h2,.long-article h1,.long-article h2{margin:0 0 10px}.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.check-grid article{padding:22px}.check-grid span{display:block;width:100%;height:3px;background:linear-gradient(90deg,var(--red),transparent);margin-bottom:18px}.flow-line{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;counter-reset:step}.flow-line div{position:relative;padding:26px;border-top:2px solid var(--red);background:rgba(255,255,255,.045)}.flow-line div:before{counter-increment:step;content:counter(step);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--red);font-weight:900;margin-bottom:14px}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.article-grid article{padding:22px}.article-grid span,.date{color:var(--warm);font-size:13px}.article-grid strong{display:inline-block;margin-left:10px;color:var(--blue);font-size:13px}.article-grid h3{font-size:19px;line-height:1.25;margin-top:12px}.faq-list{display:grid;gap:10px}.faq-list details{border:1px solid var(--line);background:rgba(255,255,255,.055);border-radius:8px;padding:18px}.faq-list summary{cursor:pointer;font-weight:800}.inner-hero{padding:72px 0 28px}.inner-hero h1{font-size:clamp(36px,6vw,70px);line-height:1.02;margin:14px 0;max-width:850px}.inner-hero p{max-width:760px;font-size:18px}.content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.content-grid article{padding:26px}.content-grid ul{padding-left:20px;color:var(--muted)}.compare-panel{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.compare-panel article{padding:28px}.device-matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.device-matrix div{padding:22px}.device-matrix strong{display:block;font-size:20px;margin-bottom:8px;color:#fff}.note-band,.prose{padding:28px}.prose p+p{margin-top:16px}.prose a{color:var(--warm);text-decoration:underline}.related{padding:22px;margin-top:20px}.related div{display:flex;gap:10px;flex-wrap:wrap}.related a{border:1px solid var(--line);border-radius:999px;padding:9px 12px;background:rgba(255,255,255,.045)}.long-article{padding:34px;max-width:900px}.long-article .related{width:100%;max-width:100%;margin-left:0;margin-right:0}.long-article header{border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:26px}.long-article h1{font-size:clamp(32px,5vw,54px);line-height:1.08}.long-article section{margin:28px 0}.pulse-footer{width:min(var(--max),calc(100vw - 36px));margin:60px auto 0;padding:28px 0 42px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px}.pulse-footer p{max-width:560px}.pulse-footer .mail{margin-top:8px;color:var(--warm)}.pulse-footer nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end;align-content:flex-start}.pulse-footer a{border:1px solid var(--line);border-radius:999px;padding:8px 12px;color:var(--muted)}@media (max-width:900px){.menu-button{display:inline-flex}.pulse-header{align-items:flex-start}.pulse-nav{display:none;position:absolute;left:18px;right:18px;top:70px;padding:12px;background:#101014;border:1px solid var(--line);border-radius:8px}.pulse-nav.is-open{display:grid}.pulse-nav a{width:100%;border-radius:6px}.velocity-cover{min-height:auto}.cover-copy{padding:58px 18px 330px}.cover-copy h1{max-width:9ch}.cover-visual{inset:auto 0 0;height:390px}.cover-visual:before{background:linear-gradient(180deg,rgba(5,5,6,.05),rgba(5,5,6,.93))}.cover-visual img{object-position:70% center}.quick-rail,.lane-grid,.check-grid,.flow-line,.article-grid,.content-grid,.compare-panel,.device-matrix{grid-template-columns:1fr}.quick-rail{transform:none;margin-top:18px}.section-head{grid-template-columns:1fr;gap:12px}.pulse-footer{display:block}.pulse-footer nav{justify-content:flex-start;margin-top:20px}.inner-hero{padding-top:46px}.long-article{padding:24px}}@media (max-width:520px){.pulse-brand{min-width:0}.pulse-brand small{display:none}.cover-copy h1{font-size:42px}.cover-copy p,.inner-hero p{font-size:16px}.cover-actions a{width:100%}.platform-lanes,.checkpoint-board,.scenario-strip,.article-deck,.faq-panel,.content-grid,.compare-panel,.device-matrix,.note-band,.prose,.long-article{padding:36px 0}.lane-card,.check-grid article,.article-grid article,.content-grid article,.compare-panel article,.device-matrix div{padding:20px}}