/* Base */
:root{--night:#0d1828;--ink:#122238;--muted:#66707b;--line:#dce0e6;--paper:#f6f8fb;--blue:#174ecc;--amber:#d3ac7d;--white:#fff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--white);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}h1,h2,h3,p,dl,dd{margin:0}p{line-height:1.9}a{color:inherit;text-underline-offset:5px}button{font:inherit;cursor:pointer}code{font:13px/1.9 ui-monospace,monospace;overflow-wrap:anywhere}a:focus-visible,button:focus-visible{outline:3px solid var(--amber);outline-offset:5px}.lf-skip{position:fixed;top:-90px;left:20px;background:white;padding:12px;z-index:30}.lf-skip:focus{top:12px}.lf-label{font-size:11px;color:var(--muted);letter-spacing:.5px}.lf-kicker{font-size:10px;letter-spacing:1.8px;font-weight:550;color:#64758a}time{font-size:11px;color:var(--muted)}
/* Brand and opening */
.lf-header{height:94px;background:var(--night);color:#fff;padding:0 max(6%,calc((100vw - 1280px)/2));display:flex;align-items:center;justify-content:space-between;gap:40px}.lf-logo{font-size:26px;font-weight:650;letter-spacing:-.8px;text-decoration:none;display:inline-flex;align-items:baseline;gap:16px}.lf-logo small{font-size:12px;font-weight:450;letter-spacing:2px;color:#b6c1d0}.lf-header nav{display:flex;gap:31px;align-items:center;font-size:12px}.lf-header nav a{text-decoration:none;color:#d0d8e3}.lf-header nav [aria-current]{color:var(--amber)}.lf-cover{height:640px;position:relative;overflow:hidden;background:var(--night)}.lf-cover>img{position:absolute;width:100%;height:100%;object-fit:cover;object-position:center 57%;display:block}.lf-cover:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,15,28,.28),transparent 68%);pointer-events:none}.lf-cover-copy{position:relative;z-index:1;max-width:1280px;margin:auto;padding:95px 0;color:white}.lf-cover .lf-kicker{color:#c2cad6}.lf-cover h1{font-size:68px;line-height:1.16;font-weight:550;letter-spacing:-2px;margin:28px 0 23px}.lf-cover h1 span{display:block;font-size:.67em;letter-spacing:1px;line-height:1.7;font-weight:450}.lf-cover-intro{font-size:16px;color:#c5ccd5}.lf-cover-actions{display:flex;align-items:center;gap:27px;margin-top:34px}.lf-button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:16px 25px;background:var(--blue);color:#fff;text-decoration:none;font-size:12px}.lf-button:hover{background:#0d40b8}.lf-cover .lf-button{background:#f3e7d5;color:#14263d}.lf-cover-link{font-size:12px;color:#e0e4eb}.lf-address-strip{background:var(--paper);display:grid;grid-template-columns:320px 1fr;gap:80px;padding:35px max(6%,calc((100vw - 1280px)/2));align-items:center}.lf-address-strip>div{display:grid;gap:10px}.lf-address-strip code{font-size:15px;color:var(--blue)}.lf-address-strip>p{font-size:12px;color:var(--muted);max-width:670px;line-height:1.95}
/* Homepage continuation */
.lf-paths{max-width:1280px;margin:auto;padding:68px 0;display:grid;grid-template-columns:280px 1fr;gap:85px}.lf-paths h2{font-size:31px;line-height:1.6;font-weight:500;letter-spacing:-.5px;margin-top:19px}.lf-path{display:grid;grid-template-columns:210px 1fr auto;align-items:center;gap:26px;text-decoration:none;padding:30px 0;border-bottom:1px solid var(--line)}.lf-path:first-child{padding-top:0}.lf-path h3{font-size:20px;font-weight:550;margin-top:12px;line-height:1.6;letter-spacing:-.3px}.lf-path>p{font-size:12px;line-height:1.95;color:var(--muted);max-width:260px}.lf-path-action{font-size:11px;color:var(--blue);text-decoration:underline;text-underline-offset:5px;white-space:nowrap}.lf-path:hover h3{color:var(--blue)}.lf-account-band{max-width:1280px;margin:auto;background:#e9eef5;display:grid;grid-template-columns:.85fr 1.15fr;gap:90px;align-items:center;padding:37px 45px}.lf-account-band h2{font-size:31px;line-height:1.6;font-weight:500}.lf-account-band p{font-size:14px;color:#5a6878;line-height:1.95}.lf-account-band a{display:inline-block;color:var(--blue);font-size:12px;margin-top:21px}.lf-reading{max-width:1280px;margin:auto;padding:70px 0 65px}.lf-reading>header{display:grid;grid-template-columns:1fr auto;align-items:center;gap:18px;margin-bottom:32px}.lf-reading>header>.lf-kicker{grid-column:1/-1}.lf-reading h2{font-size:28px;font-weight:500;line-height:1.6}.lf-reading>header>a{font-size:11px}.lf-reading-list{display:grid;grid-template-columns:1fr 1fr;gap:75px}.lf-reading-link{display:grid;grid-template-columns:1fr auto;gap:25px;border-top:2px solid var(--ink);text-decoration:none;padding-top:25px}.lf-reading-link h3{font-size:22px;font-weight:550;line-height:1.7;margin:16px 0 12px;letter-spacing:-.4px}.lf-reading-link p{font-size:12px;color:var(--muted);line-height:1.95}.lf-reading-link time{font-size:9px;white-space:nowrap;padding-top:3px}.lf-reading-link:hover h3{text-decoration:underline;text-underline-offset:6px}.lf-footer{background:var(--night);color:#fff;padding:44px max(6%,calc((100vw - 1280px)/2));display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px}.lf-footer strong{font-size:26px;letter-spacing:-1px}.lf-footer p{font-size:11px;color:#aab5c5;margin-top:14px;line-height:1.9}.lf-footer nav{display:flex;gap:30px;font-size:11px;color:#d0d8e3}.lf-footer>small{grid-column:1/-1;font-size:10px;color:#9caabe}
/* Real task pages */
.lf-inner{max-width:1100px;margin:auto;padding:36px 30px 70px;min-height:70vh}.lf-breadcrumb{font-size:11px;color:var(--muted);line-height:1.8;margin-bottom:38px}.lf-page-head{margin-bottom:32px}.lf-page-head h1{font-size:41px;line-height:1.5;letter-spacing:-.7px;font-weight:550;margin:20px 0 16px}.lf-page-head>p:last-child{font-size:15px;color:var(--muted)}.lf-answer{padding:25px 29px;border-left:3px solid var(--blue);background:var(--paper);font-size:15px;line-height:1.95}.lf-source{display:grid;grid-template-columns:110px minmax(0,1fr) auto;align-items:center;gap:18px;padding:25px 0;border-bottom:1px solid var(--line);margin-bottom:30px}.lf-source>span{font-size:12px;color:var(--muted)}.lf-source code{font-size:15px;color:var(--blue)}.lf-source button{padding:13px 20px;border:1px solid #c9d3e0;background:white;font-size:11px;color:var(--ink);min-height:44px}.lf-source output{grid-column:2/-1;font-size:11px;color:var(--blue)}.lf-source output:empty{display:none}.lf-two-notes{display:grid;grid-template-columns:1fr 1fr;gap:70px;margin-top:36px}.lf-two-notes h2,.lf-section h2{font-size:25px;line-height:1.6;font-weight:550;margin-bottom:19px;letter-spacing:-.3px}.lf-two-notes p,.lf-section p{font-size:14px;line-height:2;color:#576476}.lf-two-notes p+p,.lf-section p+p{margin-top:18px}.lf-two-notes a,.lf-section a{color:var(--blue)}.lf-notice{margin-top:38px;padding:26px 30px;background:#e9eef5}.lf-notice h2{font-size:14px;margin-bottom:13px;font-weight:550}.lf-notice p{font-size:12px;line-height:1.95;color:#5b6a7e}.lf-section{max-width:850px;margin-top:35px}.lf-definition{margin:25px 0}.lf-definition>div{display:grid;grid-template-columns:130px 1fr;gap:25px;padding:24px 0;border-top:1px solid var(--line)}.lf-definition dt{font-size:14px;font-weight:550;line-height:1.8}.lf-definition dd{font-size:14px;color:#576476;line-height:2}.lf-help-list{margin-top:30px}.lf-help-list section{display:grid;grid-template-columns:190px 1fr;gap:22px 40px;padding:30px 0;border-bottom:1px solid var(--line)}.lf-help-list h2{font-size:23px;line-height:1.6;font-weight:550;grid-row:span 2}.lf-help-list p{font-size:14px;line-height:2;color:#576476}.lf-help-list a{font-size:12px;color:var(--blue);justify-self:start}.lf-index-link{display:flex;justify-content:space-between;gap:40px;padding:29px 0;border-top:1px solid var(--line);text-decoration:none}.lf-index-link h3{font-size:26px;font-weight:550;line-height:1.6;margin:15px 0;max-width:790px}.lf-index-link p{font-size:13px;color:var(--muted)}.lf-index-link time{font-size:11px;white-space:nowrap}.lf-index-link:hover h3{color:var(--blue)}.lf-index-note{font-size:13px;line-height:2;color:var(--muted);margin-top:30px}
/* Articles: one-column reading and full-width answer banner */
.lf-article-main{max-width:1100px;margin:auto;padding:35px 30px 65px}.lf-article-heading h1{font-size:43px;font-weight:550;line-height:1.5;letter-spacing:-.8px;margin:21px 0 25px;max-width:1000px}.lf-article-heading time{font-size:11px}.lf-article-summary{margin:32px 0 43px;padding:28px 33px;background:var(--night);color:white;display:grid;grid-template-columns:1fr 200px;gap:55px;align-items:center}.lf-article-summary p{font-size:15px;line-height:1.95}.lf-article-summary span{font-size:11px;color:#c5d0e0;line-height:1.9;border-left:1px solid #45556c;padding-left:25px}.lf-prose{max-width:780px;margin:0 auto}.lf-prose section{margin-bottom:35px}.lf-prose section h2{font-size:26px;line-height:1.65;font-weight:550;margin-bottom:19px}.lf-prose section p{font-size:15px;line-height:2;color:#4d5c70}.lf-prose section p+p{margin-top:18px}.lf-prose section a{color:var(--blue)}.lf-source-note{border-top:1px solid var(--line);padding-top:25px;margin-top:38px}.lf-source-note h2{font-size:12px;font-weight:550;line-height:1.8;margin-bottom:13px}.lf-source-note p{font-size:11px;line-height:2;color:var(--muted)}.lf-article-next{background:#e9eef5;margin:38px 0 0;padding:28px 33px;display:grid;grid-template-columns:120px 1fr;gap:17px 30px;font-size:12px;line-height:1.9}.lf-article-next span{grid-row:span 2;color:var(--muted)}.lf-article-next a{justify-self:start;color:var(--blue)}.lf-missing{padding-top:85px}.lf-missing h1{font-size:39px;line-height:1.5;margin:24px 0}.lf-missing>p:not(.lf-kicker){font-size:15px;color:var(--muted);margin-bottom:28px}.lf-missing>div{display:flex;align-items:center;gap:25px;font-size:13px}
/* Responsive */
@media(max-width:1439px){.lf-cover-copy{padding-left:6%;padding-right:6%}.lf-paths,.lf-account-band,.lf-reading{margin-left:6%;margin-right:6%}.lf-paths{gap:50px;grid-template-columns:240px 1fr}.lf-path{grid-template-columns:180px 1fr;gap:17px 30px}.lf-path-action{grid-column:2}.lf-path>div{grid-row:span 2}.lf-account-band{gap:50px}.lf-reading-list{gap:45px}}@media(max-width:1050px){.lf-cover h1{font-size:58px}.lf-cover{height:600px}.lf-cover-copy{padding-top:95px}.lf-paths{display:block}.lf-paths header{margin-bottom:30px}.lf-paths h2 br{display:none}.lf-path:first-child{padding-top:25px}.lf-path{grid-template-columns:240px 1fr auto;gap:25px}.lf-path-action{grid-column:auto}.lf-path>div{grid-row:auto}.lf-reading-link{grid-template-columns:1fr}.lf-reading-link time{padding-top:0}.lf-reading-link h3{font-size:21px}.lf-header{height:85px}.lf-header nav{gap:22px}.lf-account-band h2{font-size:28px}}@media(max-width:650px){.lf-header{height:auto;display:block;padding:21px 20px 18px}.lf-logo{font-size:25px;gap:14px}.lf-logo small{font-size:10px}.lf-header nav{margin-top:23px;justify-content:space-between;font-size:11px;gap:12px}.lf-cover{height:620px}.lf-cover>img{object-position:75% center}.lf-cover:after{background:linear-gradient(180deg,rgba(7,15,28,.93) 0%,rgba(7,15,28,.7) 35%,rgba(7,15,28,.05) 73%)}.lf-cover-copy{padding:42px 20px}.lf-cover .lf-kicker{font-size:9px;letter-spacing:1.5px}.lf-cover h1{font-size:46px;letter-spacing:-1.5px;line-height:1.18;margin:23px 0 17px}.lf-cover h1 span{font-size:.69em;line-height:1.7;letter-spacing:.4px}.lf-cover-intro{font-size:13px}.lf-cover-actions{gap:22px;margin-top:27px;flex-wrap:wrap}.lf-button{font-size:11px;padding:14px 20px;min-height:45px}.lf-cover-link{font-size:11px}.lf-address-strip{padding:26px 20px;display:block}.lf-address-strip>div{gap:10px}.lf-address-strip code{font-size:14px}.lf-address-strip>p{font-size:12px;line-height:1.95;margin-top:19px}.lf-label{font-size:10px}.lf-paths,.lf-account-band,.lf-reading{margin-left:20px;margin-right:20px}.lf-paths{padding:36px 0}.lf-paths header{margin-bottom:22px}.lf-paths h2{font-size:26px;line-height:1.55;margin-top:15px}.lf-paths h2 br{display:initial}.lf-path{display:block;padding:25px 0}.lf-path:first-child{padding-top:0}.lf-path h3{font-size:23px;margin-top:10px}.lf-path>p{font-size:12px;line-height:1.95;margin-top:15px;max-width:none}.lf-path-action{display:inline-block;font-size:11px;margin-top:18px}.lf-account-band{display:block;padding:28px 24px}.lf-account-band h2{font-size:27px;line-height:1.6}.lf-account-band>div{margin-top:23px}.lf-account-band p{font-size:13px;line-height:1.95}.lf-account-band a{font-size:11px;margin-top:20px}.lf-reading{padding:38px 0}.lf-reading>header{display:block;margin-bottom:27px}.lf-reading h2{font-size:26px;line-height:1.6;margin:14px 0 17px}.lf-reading>header>a{font-size:11px}.lf-reading-list{display:block}.lf-reading-link{padding:23px 0;margin-top:22px;gap:20px}.lf-reading-link h3{font-size:23px;line-height:1.65;margin:14px 0}.lf-reading-link p{font-size:12px;line-height:1.95}.lf-reading-link time{font-size:10px}.lf-footer{display:block;padding:31px 20px}.lf-footer strong{font-size:25px}.lf-footer p{font-size:10px;line-height:1.9;max-width:320px;margin-top:13px}.lf-footer nav{font-size:10px;gap:24px;margin:25px 0}.lf-footer>small{font-size:9px}.lf-inner,.lf-article-main{padding:27px 20px 43px}.lf-breadcrumb{font-size:10px;line-height:1.8;margin-bottom:29px}.lf-page-head{margin-bottom:25px}.lf-page-head h1{font-size:31px;line-height:1.5;letter-spacing:-.5px;margin:18px 0 16px}.lf-page-head>p:last-child{font-size:13px;line-height:1.9}.lf-answer{font-size:14px;line-height:1.95;padding:21px}.lf-source{display:flex;align-items:flex-start;flex-direction:column;gap:16px;padding:24px 0;margin-bottom:27px}.lf-source>span{font-size:11px}.lf-source code{font-size:13px}.lf-source button{font-size:11px}.lf-source output{font-size:10px}.lf-two-notes{display:block;margin-top:28px}.lf-two-notes section+section{margin-top:30px}.lf-two-notes h2,.lf-section h2{font-size:24px;line-height:1.6;margin-bottom:17px}.lf-two-notes p,.lf-section p{font-size:14px;line-height:1.95}.lf-notice{padding:23px;margin-top:29px}.lf-notice h2{font-size:13px}.lf-notice p{font-size:11px}.lf-section{margin-top:30px}.lf-definition>div{display:block;padding:22px 0}.lf-definition dt{font-size:13px;margin-bottom:13px}.lf-definition dd{font-size:13px;line-height:1.95}.lf-help-list{margin-top:26px}.lf-help-list section{display:block;padding:26px 0}.lf-help-list h2{font-size:24px;line-height:1.6;margin-bottom:17px}.lf-help-list p{font-size:13px;line-height:1.95}.lf-help-list a{font-size:11px;display:inline-block;margin-top:20px}.lf-index-link{display:block;padding:25px 0}.lf-index-link h3{font-size:25px;line-height:1.6;margin:15px 0}.lf-index-link p{font-size:12px;line-height:1.95}.lf-index-link time{display:block;font-size:10px;margin-top:20px}.lf-index-note{font-size:12px;line-height:1.95;margin-top:24px}.lf-article-heading h1{font-size:31px;line-height:1.5;letter-spacing:-.6px;margin:19px 0 23px}.lf-article-heading time{font-size:10px}.lf-article-summary{display:block;padding:24px;margin:28px 0 31px}.lf-article-summary p{font-size:14px;line-height:1.95}.lf-article-summary span{display:block;font-size:10px;border-left:0;border-top:1px solid #45556c;padding:17px 0 0;margin-top:18px;line-height:1.9}.lf-prose section{margin:29px 0}.lf-prose section h2{font-size:24px;line-height:1.65;margin-bottom:17px}.lf-prose section p{font-size:14px;line-height:1.95}.lf-source-note{margin-top:31px;padding-top:24px}.lf-source-note h2{font-size:11px}.lf-source-note p{font-size:10px;line-height:1.95}.lf-article-next{display:block;padding:24px;margin-top:30px;font-size:11px}.lf-article-next span{display:block;font-size:10px;margin-bottom:18px}.lf-article-next a{display:block;line-height:1.95;margin-top:18px}.lf-missing{padding-top:70px}.lf-missing h1{font-size:31px}.lf-missing>div{display:block;font-size:12px}.lf-missing>div>a:last-child{display:block;margin-top:26px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}