:root{
  --paper:#f4f0e7;--paper-2:#fbf9f4;--ink:#14233a;--muted:#617084;--blue:#1e4f91;--blue-deep:#12345f;--rust:#9b5837;--line:#d9d3c7;--white:#fff;--shadow:0 18px 50px rgba(20,35,58,.08);--serif:"Songti SC","STSong","Noto Serif SC",Georgia,serif;--sans:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--sans);line-height:1.7;-webkit-font-smoothing:antialiased}body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.38;background-image:linear-gradient(rgba(20,35,58,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(20,35,58,.025) 1px,transparent 1px);background-size:32px 32px;mask-image:linear-gradient(to bottom,#000,transparent 88%);z-index:-1}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.container{width:min(1240px,calc(100% - 48px));margin:auto}.topline{height:4px;background:linear-gradient(90deg,var(--blue-deep) 0 62%,var(--rust) 62%)}
.site-header{position:sticky;top:0;z-index:50;background:rgba(244,240,231,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(20,35,58,.1)}.nav-wrap{height:82px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:12px;flex:none}.brand img{width:58px;height:58px;object-fit:contain}.brand-text strong{display:block;font:700 22px/1.15 var(--serif);letter-spacing:.05em}.brand-text small{display:block;margin-top:3px;color:var(--muted);font-size:10px;letter-spacing:.04em}.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.main-nav a{position:relative;padding:28px 12px 24px;font-size:14px;color:#39485c;white-space:nowrap}.main-nav a:after{content:"";position:absolute;left:12px;right:12px;bottom:18px;height:2px;background:var(--blue);transform:scaleX(0);transition:.25s}.main-nav a:hover,.main-nav a.active{color:var(--blue-deep)}.main-nav a:hover:after,.main-nav a.active:after{transform:scaleX(1)}.nav-actions{display:flex;align-items:center;gap:8px}.icon-btn,.menu-btn{width:42px;height:42px;border:1px solid var(--line);background:transparent;display:grid;place-items:center;color:var(--ink);cursor:pointer}.icon{width:21px;height:21px}.btn{border:0;padding:11px 17px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.2s}.btn-primary{background:var(--blue-deep);color:#fff}.btn-primary:hover{background:var(--blue)}.btn-ghost{border:1px solid var(--line);background:transparent}.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}.menu-btn{display:none}.mobile-panel{display:none}
.hero{padding:76px 0 42px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:58px}.eyebrow{display:flex;align-items:center;gap:12px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}.eyebrow:before{content:"";width:38px;height:2px;background:var(--rust)}h1,h2,h3{font-family:var(--serif);margin:0;line-height:1.28}h1{font-size:clamp(44px,6vw,76px);letter-spacing:-.025em;font-weight:700;margin:18px 0 22px}.hero-copy{max-width:660px;color:var(--muted);font-size:17px}.search-shell{margin-top:34px;display:flex;background:var(--paper-2);border:1px solid #b8c3cf;box-shadow:0 14px 35px rgba(20,35,58,.08)}.search-shell .icon{margin:17px;color:var(--blue)}.search-shell input{min-width:0;flex:1;border:0;background:transparent;outline:none;padding:0 6px;color:var(--ink)}.search-shell button{padding:0 24px;border:0;background:var(--blue-deep);color:#fff;font-weight:700;cursor:pointer}.quick-tags{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:16px;font-size:12px}.quick-tags span{color:var(--muted)}.quick-tags a{border:1px solid #c9d1d9;padding:5px 11px;border-radius:999px;background:rgba(255,255,255,.42)}.quick-tags a:hover{border-color:var(--blue);color:var(--blue)}
.hero-art{position:relative;min-height:470px}.orbit{position:absolute;width:260px;height:260px;border:1px solid rgba(30,79,145,.28);border-radius:50%;top:12px;left:10px}.orbit:before,.orbit:after{content:"";position:absolute;inset:32px;border:1px solid rgba(30,79,145,.22);border-radius:50%;transform:rotate(58deg) scaleX(.45)}.orbit:after{transform:rotate(-42deg) scaleX(.38)}.orb-dot{position:absolute;width:14px;height:14px;border-radius:50%;background:var(--rust);left:124px;top:-7px;box-shadow:0 0 0 8px rgba(155,88,55,.12)}.papers-stack{position:absolute;right:10px;bottom:0;width:76%;height:84%}.sheet{position:absolute;inset:0;background:#fbfaf6;border:1px solid #d4cec1;box-shadow:var(--shadow);padding:46px;transform:rotate(4deg)}.sheet.back{transform:translate(-26px,24px) rotate(-7deg);background:#eae5dc}.sheet.mid{transform:translate(-12px,10px) rotate(-1deg);background:#f1ede5}.journal-kicker{font:12px var(--sans);letter-spacing:.26em;color:var(--rust)}.journal-title{font:700 42px/1.15 var(--serif);margin:24px 0 32px}.rule{height:1px;background:#aeb7c0;margin:14px 0}.abstract{display:grid;grid-template-columns:70px 1fr;gap:18px;margin-top:34px;color:var(--muted);font-size:11px}.abstract strong{font:700 20px var(--serif);color:var(--ink)}.pen{position:absolute;right:-15px;bottom:45px;width:250px;height:16px;background:linear-gradient(90deg,#0e1b2b,#0e1b2b 70%,#c9a863 70%,#c9a863 92%,#121212 92%);transform:rotate(-32deg);border-radius:999px;box-shadow:0 12px 20px rgba(0,0,0,.16)}.pen:after{content:"";position:absolute;right:-35px;top:0;border-left:38px solid #c9a863;border-top:8px solid transparent;border-bottom:8px solid transparent}
.stats{margin:24px auto 70px;background:rgba(251,249,244,.9);border-top:1px solid var(--ink);border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr)}.stat{display:flex;align-items:center;gap:18px;padding:28px 30px;border-right:1px solid var(--line)}.stat:last-child{border-right:0}.stat .icon{width:34px;height:34px;color:var(--blue)}.stat b{display:block;font:700 28px var(--serif);letter-spacing:.02em}.stat small{color:var(--muted)}
.section{padding:70px 0}.section.alt{background:rgba(255,255,255,.45);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}.section-title{font-size:38px}.section-sub{color:var(--muted);margin-top:8px}.text-link{color:var(--blue);font-size:14px;display:inline-flex;align-items:center;gap:5px}.content-grid{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:0;border-top:2px solid var(--ink);background:rgba(251,249,244,.75)}.editorial-panel{padding:30px;border-right:1px solid var(--line)}.editorial-panel:last-child{border-right:0}.panel-kicker{font-size:11px;color:var(--rust);letter-spacing:.14em;text-transform:uppercase}.panel-title{font-size:25px;margin:7px 0 18px}.paper-item{padding:18px 0;border-top:1px solid var(--line)}.paper-item:first-of-type{border-top:0}.paper-item h3{font:700 17px/1.55 var(--serif)}.paper-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px;color:var(--muted);font-size:12px}.paper-meta b{color:var(--blue);font-weight:600}.trend-item{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:start;padding:14px 0;border-top:1px solid var(--line);font-size:13px}.trend-item .tag{background:#e8eef5;color:var(--blue);padding:2px 7px}.trend-item time{color:var(--muted)}.journal-item{padding:14px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px}.journal-item b{display:block;font-family:var(--serif)}.journal-item small{color:var(--muted)}.badge{align-self:start;border:1px solid #d9bea9;color:var(--rust);padding:2px 7px;font-size:10px}
.roadmap{border:1px solid var(--line);background:var(--paper-2);padding:42px 36px;box-shadow:0 15px 40px rgba(20,35,58,.05)}.steps{display:grid;grid-template-columns:repeat(6,1fr);margin-top:34px}.step{position:relative;text-align:center;padding:0 14px}.step:after{content:"";position:absolute;top:31px;left:70%;right:-30%;border-top:1px dashed #91a0b1}.step:last-child:after{display:none}.step-icon{width:64px;height:64px;margin:auto;border:1px solid #b7c2ce;border-radius:50%;display:grid;place-items:center;background:var(--paper-2);position:relative;z-index:1;color:var(--blue)}.step h3{font-size:17px;margin:16px 0 7px}.step p{margin:0;color:var(--muted);font-size:12px;line-height:1.6}
.tools-grid{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}.tool-card{padding:28px 22px;min-height:180px;border-right:1px solid var(--line);transition:.22s;background:rgba(251,249,244,.5)}.tool-card:last-child{border-right:0}.tool-card:hover{background:var(--ink);color:#fff;transform:translateY(-5px)}.tool-card .icon{width:36px;height:36px;color:var(--blue)}.tool-card:hover .icon,.tool-card:hover p{color:#d6e1ef}.tool-card h3{font-size:19px;margin:28px 0 7px}.tool-card p{margin:0;color:var(--muted);font-size:12px}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.topic-card{position:relative;min-height:360px;overflow:hidden;background:#132238;color:#fff;display:flex;align-items:end}.topic-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.4s}.topic-card:after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(9,17,28,.92),rgba(9,17,28,.05) 70%)}.topic-card:hover img{transform:scale(1.04)}.topic-copy{position:relative;z-index:1;padding:27px}.topic-copy h3{font-size:24px}.topic-copy p{margin:10px 0 18px;color:#d8e0e9;font-size:13px}.topic-copy span{font-size:12px;border-bottom:1px solid #fff;padding-bottom:4px}
.page-hero{padding:70px 0 50px;border-bottom:1px solid var(--line)}.page-hero .crumb{font-size:12px;color:var(--muted);margin-bottom:18px}.page-hero h1{font-size:58px;margin:0 0 16px}.page-hero p{max-width:720px;color:var(--muted);font-size:16px}.filterbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}.filter-btn{border:1px solid var(--line);background:transparent;padding:8px 14px;cursor:pointer}.filter-btn.active,.filter-btn:hover{background:var(--ink);color:#fff;border-color:var(--ink)}.list-layout{display:grid;grid-template-columns:1fr 310px;gap:45px}.paper-list{border-top:2px solid var(--ink)}.paper-row{display:grid;grid-template-columns:80px 1fr auto;gap:24px;padding:28px 0;border-bottom:1px solid var(--line)}.paper-index{font:700 28px var(--serif);color:#aab2bd}.paper-row h2{font-size:24px;margin-bottom:8px}.paper-row p{margin:0;color:var(--muted)}.paper-actions{display:flex;align-items:center}.sidebox{border-top:2px solid var(--ink);padding-top:20px;margin-bottom:32px}.sidebox h3{font-size:21px;margin-bottom:14px}.sidebox a{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid var(--line);font-size:13px}.journal-table{width:100%;border-collapse:collapse;border-top:2px solid var(--ink);background:rgba(251,249,244,.7)}.journal-table th,.journal-table td{text-align:left;padding:18px 16px;border-bottom:1px solid var(--line);font-size:13px}.journal-table th{font-size:12px;color:var(--muted);letter-spacing:.08em}.journal-table td:first-child{font:700 17px var(--serif)}.method-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.method-card{padding:34px;border:1px solid var(--line);background:rgba(251,249,244,.6)}.method-card .num{font:700 46px var(--serif);color:#b1b9c2}.method-card h2{font-size:26px;margin:4px 0 12px}.method-card p{color:var(--muted)}.method-card ul{padding-left:18px;color:#46556a}.tool-directory{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.directory-card{padding:30px;border-top:3px solid var(--blue);background:var(--paper-2);box-shadow:0 12px 30px rgba(20,35,58,.05)}.directory-card h2{font-size:24px;margin:18px 0 8px}.directory-card p{color:var(--muted)}.directory-card .icon{width:36px;height:36px;color:var(--blue)}.guide-flow{display:grid;grid-template-columns:190px 1fr;gap:50px}.guide-nav{position:sticky;top:110px;align-self:start;border-top:2px solid var(--ink)}.guide-nav a{display:block;padding:14px 0;border-bottom:1px solid var(--line);font-size:13px}.guide-content section{padding:0 0 54px}.guide-content h2{font-size:31px;margin-bottom:14px}.guide-content p{color:var(--muted)}.checklist{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:20px}.checkitem{padding:15px;border:1px solid var(--line);background:rgba(255,255,255,.42)}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:65px;align-items:start}.quote-block{font:700 42px/1.5 var(--serif);border-left:5px solid var(--rust);padding-left:28px}.about-copy p{color:var(--muted)}.values{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}.value{border-top:2px solid var(--ink);padding-top:18px}.value h3{font-size:20px}.value p{color:var(--muted);font-size:13px}
.site-footer{margin-top:80px;background:var(--blue-deep);color:#fff}.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr 1fr;gap:42px;padding:54px 0}.footer-brand{display:flex;gap:14px;align-items:center}.footer-brand img{width:62px}.footer-brand h3{font-size:24px}.footer-copy{color:#c7d3e1;font-size:13px;margin-top:18px;max-width:350px}.footer-col h4{font-family:var(--serif);font-size:18px;margin:0 0 16px}.footer-col a,.footer-col p{display:block;color:#c7d3e1;font-size:13px;margin:8px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding:18px 0;color:#9fb0c4;font-size:11px;display:flex;justify-content:space-between;gap:20px}.toast{position:fixed;right:24px;bottom:24px;background:var(--ink);color:#fff;padding:13px 18px;transform:translateY(130%);transition:.3s;z-index:100}.toast.show{transform:translateY(0)}
.reveal{opacity:1;transform:none}.js .reveal{opacity:1;transform:none}.reveal.visible{opacity:1;transform:none}
@media (max-width:1100px){.main-nav{display:none}.menu-btn{display:grid;margin-left:auto}.nav-actions .btn{display:none}.hero-grid{grid-template-columns:1fr}.hero-art{min-height:390px}.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}.content-grid{grid-template-columns:1fr 1fr}.editorial-panel:nth-child(2){border-right:0}.editorial-panel:last-child{grid-column:1/-1;border-top:1px solid var(--line)}.steps{grid-template-columns:repeat(3,1fr);row-gap:35px}.step:nth-child(3):after,.step:nth-child(6):after{display:none}.tools-grid{grid-template-columns:repeat(3,1fr)}.tool-card:nth-child(3){border-right:0}.tool-card:nth-child(-n+3){border-bottom:1px solid var(--line)}.topic-grid{grid-template-columns:repeat(2,1fr)}.list-layout{grid-template-columns:1fr}.sidebar{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.tool-directory{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}.footer-grid .footer-col:last-child{grid-column:1/-1}.mobile-panel.open{display:block;padding:16px 24px 24px;border-top:1px solid var(--line);background:var(--paper)}.mobile-panel a{display:block;padding:11px 0;border-bottom:1px solid var(--line)}}
@media (max-width:700px){.container{width:min(100% - 28px,1240px)}.nav-wrap{height:70px}.brand img{width:48px;height:48px}.brand-text strong{font-size:18px}.brand-text small{display:none}.icon-btn{display:none}.hero{padding-top:48px}.hero h1{font-size:42px}.hero-art{min-height:300px}.papers-stack{width:88%}.sheet{padding:30px}.journal-title{font-size:30px}.pen{width:170px}.search-shell{flex-wrap:wrap}.search-shell button{width:100%;height:48px}.stats{grid-template-columns:1fr}.stat{border-right:0;border-bottom:1px solid var(--line)!important}.content-grid{grid-template-columns:1fr}.editorial-panel{border-right:0;border-bottom:1px solid var(--line)}.editorial-panel:last-child{grid-column:auto}.section{padding:52px 0}.section-title{font-size:31px}.section-head{align-items:start;flex-direction:column}.steps{grid-template-columns:1fr 1fr}.step:after{display:none}.tools-grid{grid-template-columns:1fr 1fr}.tool-card:nth-child(odd){border-right:1px solid var(--line)}.tool-card:nth-child(even){border-right:0}.tool-card{border-bottom:1px solid var(--line)}.topic-grid{grid-template-columns:1fr}.page-hero h1{font-size:42px}.paper-row{grid-template-columns:45px 1fr}.paper-actions{grid-column:2}.sidebar{grid-template-columns:1fr}.journal-table{display:block;overflow-x:auto;white-space:nowrap}.method-grid,.tool-directory,.values{grid-template-columns:1fr}.guide-flow{grid-template-columns:1fr}.guide-nav{position:static}.checklist{grid-template-columns:1fr}.about-grid{grid-template-columns:1fr}.quote-block{font-size:31px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>*:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column}.orbit{width:190px;height:190px}.topic-card{min-height:320px}}


/* 2026 production refinement: accessibility, paper links, filing information */
.skip-link{position:fixed;left:16px;top:-80px;z-index:200;background:var(--ink);color:#fff;padding:10px 14px;transition:top .2s}.skip-link:focus{top:12px}
:focus-visible{outline:3px solid rgba(30,79,145,.38);outline-offset:3px}
.icp-link{color:#dce7f3;text-decoration:underline;text-underline-offset:3px}.icp-link:hover{color:#fff}
.paper-title-link,.paper-row h2 a{transition:color .2s}.paper-title-link:hover,.paper-row h2 a:hover{color:var(--blue);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.result-summary{margin:-12px 0 22px;color:var(--muted);font-size:13px}
.filter-btn{display:inline-flex;align-items:center;gap:8px}.filter-count{min-width:22px;height:22px;padding:0 6px;border-radius:999px;display:inline-grid;place-items:center;background:rgba(30,79,145,.08);color:var(--blue);font-size:11px}.filter-btn.active .filter-count,.filter-btn:hover .filter-count{background:rgba(255,255,255,.16);color:#fff}
.paper-row--linked{transition:background .22s,padding .22s}.paper-row--linked:hover{background:rgba(255,255,255,.42);padding-left:14px;padding-right:14px}.paper-body{min-width:0}.paper-original{font-size:12px!important;line-height:1.5;margin:0 0 7px!important;color:#7b8796!important;font-style:italic}.paper-keywords{display:flex;gap:7px;flex-wrap:wrap;margin-top:12px}.paper-keywords span{border:1px solid #cbd3dc;color:#52647a;padding:2px 8px;font-size:10px;border-radius:999px;background:rgba(255,255,255,.34)}.external-button{white-space:nowrap}.empty-state{padding:52px 24px;border-bottom:1px solid var(--line);text-align:center}.empty-state strong{font:700 23px var(--serif)}.empty-state p,.side-note{color:var(--muted);font-size:13px}.directory-note{display:block;color:var(--blue);font-size:13px;margin-top:16px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.js .reveal{opacity:1;transform:none}}
@media (max-width:700px){.paper-row--linked:hover{padding-left:0;padding-right:0}.paper-original{word-break:break-word}.paper-actions{align-items:flex-start}.external-button{width:100%}}


/* 2026-07-31 full-site consistency pass */
:root{--header-height:82px;--brand-logo-size:58px;--brand-column:330px}
.site-header{min-height:var(--header-height)}
.nav-wrap{height:var(--header-height);min-height:var(--header-height);padding-block:0}
.brand{width:var(--brand-column);min-width:var(--brand-column);gap:12px}
.brand img{display:block;flex:0 0 var(--brand-logo-size);width:var(--brand-logo-size);height:var(--brand-logo-size);aspect-ratio:1/1}
.brand-text{display:block;min-width:0}
.brand-text strong{font-size:22px;line-height:1.15;white-space:nowrap}
.brand-text small{font-size:10px;line-height:1.35;white-space:nowrap}
.main-nav{height:100%;justify-content:flex-end;flex:1}
.main-nav a{display:flex;align-items:center;height:100%;padding:0 12px;font-size:14px;line-height:1}
.main-nav a:after{bottom:17px}
.nav-actions{flex:0 0 auto}
.icon-btn{flex:0 0 42px}

/* Motion states are added at runtime, so content remains readable without JavaScript. */
.motion-target{will-change:transform,opacity}
.motion-complete{will-change:auto}
.page-hero{overflow:hidden}
.page-hero .container>*{transform-origin:left center}
.site-footer{overflow:hidden}
.mobile-panel a[aria-current="page"]{color:var(--blue);font-weight:700}

@media(max-width:1100px){
  :root{--brand-column:auto}
  .brand{width:auto;min-width:0}
  .main-nav{display:none}
}
@media(max-width:700px){
  :root{--header-height:70px;--brand-logo-size:48px}
  .nav-wrap{height:var(--header-height);min-height:var(--header-height)}
  .brand-text strong{font-size:18px}
}

.steps.steps-four{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:700px){.steps.steps-four{grid-template-columns:1fr 1fr}}
@media(max-width:420px){.steps.steps-four{grid-template-columns:1fr}}