/* Base */
:root{--ink:#1b2835;--muted:#62717c;--line:#d9e1e8;--blue:#2253bd;--paper:#fcfcfa;--soft:#edf3f8;--serif:Georgia,'Songti SC','SimSun',serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.8}a{color:inherit;text-underline-offset:5px}a:hover{color:var(--blue)}a:focus-visible{outline:3px solid #4877d7;outline-offset:5px}p,figure,dl{margin:0}p+p{margin-top:16px}h1,h2,h3{line-height:1.35;text-wrap:balance}h1{margin:0;font-size:clamp(30px,3.9vw,57px);letter-spacing:-1.5px}h2{margin:0 0 20px;font-size:27px}h3{font-size:20px}code{font-family:Consolas,monospace;font-size:.91em;overflow-wrap:anywhere}img{display:block;max-width:100%;height:auto}button,a{touch-action:manipulation}time{color:var(--muted);font-size:13px}.mesl-skip{position:absolute;left:20px;top:-90px;padding:8px;background:white;z-index:10}.mesl-skip:focus{top:10px}
/* Layout */
.mesl-header,.mesl-footer,.mesl-cover,.mesl-meaning,.mesl-guide-section,.mesl-help-strip{max-width:1240px;margin:auto;padding-left:40px;padding-right:40px}.mesl-header{min-height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.mesl-header nav,.mesl-footer nav{display:flex;flex-wrap:wrap;gap:25px}.mesl-header nav{font-size:14px}.mesl-header nav a{text-decoration:none}.mesl-wordmark{font-size:25px;letter-spacing:-1px;font-weight:700;text-decoration:none;line-height:1.3}.mesl-wordmark small{display:block;font-size:10px;letter-spacing:1px;font-weight:400;color:var(--muted);margin-top:5px}.mesl-cover{display:grid;grid-template-columns:1.04fr 1fr;gap:70px;padding-top:64px;padding-bottom:76px;align-items:center}.mesl-cover-photo{position:relative}.mesl-cover-photo img{width:100%;aspect-ratio:4/5;object-fit:cover}.mesl-cover-photo figcaption{margin-top:10px;color:var(--muted);font-size:11px}.mesl-meaning{display:grid;grid-template-columns:.8fr 1.4fr;column-gap:70px;padding-top:56px;padding-bottom:62px;border-top:1px solid var(--line)}.mesl-meaning>.mesl-text-link{grid-column:2;margin-top:24px;justify-self:start}.mesl-help-strip{padding-top:34px;padding-bottom:34px;display:grid;grid-template-columns:1.1fr 1fr auto;align-items:center;gap:28px;background:var(--blue);color:white}.mesl-help-strip h2{font-size:24px;margin:5px 0}.mesl-help-strip p{font-size:14px}.mesl-help-strip .mesl-kicker{color:#d3e2ff}.mesl-help-strip a{font-size:14px;white-space:nowrap}.mesl-help-strip a:hover{color:#d3e2ff}.mesl-guide-section{display:grid;grid-template-columns:.8fr 1.4fr;gap:70px;padding-top:66px;padding-bottom:74px}.mesl-page{max-width:1000px;margin:auto;padding:65px 40px 88px;min-height:60vh}.mesl-page h1{font-size:clamp(30px,3vw,43px);max-width:800px}.mesl-page>h2{margin-top:42px}.mesl-page>p,.mesl-page>.mesl-result-pairs{max-width:820px}.mesl-reading{max-width:1000px;margin:auto;padding:58px 40px 84px}.mesl-note-head{border-bottom:1px solid var(--line);padding-bottom:32px}.mesl-note-head h1{font-size:clamp(29px,3.6vw,45px);max-width:850px}.mesl-note-head time{display:block;margin-top:23px}.mesl-note-body{max-width:770px;margin:42px auto 0}.mesl-note-body h2{font-size:25px;margin-top:46px}.mesl-note-related{margin:48px auto 0;border-top:1px solid var(--line);padding-top:25px;display:flex;justify-content:space-between;gap:30px;max-width:770px;font-size:14px}.mesl-footer{border-top:1px solid var(--line);padding-top:34px;padding-bottom:28px;display:grid;grid-template-columns:1fr auto;gap:24px;font-size:13px}.mesl-footer strong{font-size:22px}.mesl-footer p{color:var(--muted)}.mesl-footer .mesl-fine{grid-column:1/-1;font-size:11px}
/* Components */
.mesl-menu summary{display:none;cursor:pointer;min-height:32px}.mesl-menu-links{display:flex;gap:25px}.mesl-menu:not([open]) .mesl-menu-links{display:none}.mesl-breadcrumb{max-width:1000px;margin:26px auto -24px;padding:0 40px;display:flex;gap:20px;font-size:12px;color:var(--muted)}
.mesl-kicker{font-size:11px;letter-spacing:1.5px;color:var(--blue);margin-bottom:20px;font-weight:700}.mesl-intro{font-size:17px;color:var(--muted);max-width:450px;margin-top:23px}.mesl-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:white;min-height:48px;padding:9px 25px;margin-top:29px;font-size:15px;text-decoration:none}.mesl-primary:hover{background:#193e8d;color:white}.mesl-cover-note{border-left:2px solid var(--blue);padding-left:17px;margin-top:49px;font-size:13px;color:var(--muted);max-width:340px}.mesl-cover-note span{font-size:14px;color:var(--ink)}.mesl-cover-note p{margin-top:5px}.mesl-purpose-pair{display:grid;grid-template-columns:1fr 1fr}.mesl-purpose-pair>div{padding:7px 25px 10px;border-left:1px solid var(--line)}.mesl-purpose-pair dt{font-size:14px;margin-bottom:18px;color:var(--muted)}.mesl-purpose-pair dd{margin:0}.mesl-purpose-pair code{font-size:20px}.mesl-purpose-pair p{font-size:14px;margin-top:14px;color:var(--muted)}.mesl-text-link{font-size:14px}.mesl-home-guides{display:grid;grid-template-columns:1fr 1fr;gap:33px}.mesl-guide-entry{padding-top:18px;border-top:2px solid var(--ink)}.mesl-guide-entry h2{font-size:21px;margin-bottom:13px}.mesl-guide-entry h2 a{text-decoration:none}.mesl-guide-entry p:not(.mesl-kicker){font-size:14px;color:var(--muted)}.mesl-guide-entry time{display:block;margin-top:19px}.mesl-guide-entry .mesl-kicker{margin-bottom:14px}.mesl-guide-index{display:grid;gap:40px;margin:45px 0}.mesl-guide-index .mesl-guide-entry{display:grid;grid-template-columns:1fr 2.5fr;column-gap:30px}.mesl-guide-index .mesl-guide-entry h2{grid-column:2;grid-row:1/3}.mesl-guide-index .mesl-guide-entry p:not(.mesl-kicker){grid-column:2}.mesl-guide-index .mesl-guide-entry time{grid-column:1;grid-row:2}.mesl-answer{margin-top:24px!important;padding:20px 24px;background:var(--soft);border-left:3px solid var(--blue);font-size:17px}.mesl-result-pairs{margin-top:32px}.mesl-result-pairs>div{display:grid;grid-template-columns:170px 1fr;gap:28px;padding:24px 0;border-bottom:1px solid var(--line)}.mesl-result-pairs dt{font-weight:bold}.mesl-result-pairs dd{margin:0}.mesl-result-pairs p{margin-top:8px}.mesl-compare-table{margin:30px 0;overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.65}caption{text-align:left;font-size:13px;color:var(--muted);padding-bottom:12px}th,td{padding:15px 12px;text-align:left;border:1px solid var(--line);vertical-align:top}thead{background:var(--soft)}tbody th{font-family:Consolas,monospace;font-size:13px;overflow-wrap:anywhere}.mesl-source-note{border-top:1px solid var(--line);margin-top:45px;padding-top:15px;font-size:13px;color:var(--muted)}.mesl-source-note h2{font-size:16px;margin:0 0 10px}.mesl-source-note p{line-height:1.85}
/* Responsive */
@media(max-width:600px){.mesl-menu summary{display:list-item}.mesl-menu-links{padding-top:12px;flex-wrap:wrap;gap:24px}.mesl-breadcrumb{padding:0 23px;margin-top:20px;margin-bottom:-16px}}
@media(max-width:850px){.mesl-cover{gap:30px}.mesl-meaning,.mesl-guide-section{gap:30px;grid-template-columns:1fr}.mesl-meaning>.mesl-text-link{grid-column:1}.mesl-help-strip{grid-template-columns:1fr 1fr}.mesl-help-strip>a{grid-column:2}.mesl-purpose-pair{max-width:650px}.mesl-footer{grid-template-columns:1fr}.mesl-home-guides{gap:30px}}
@media(max-width:600px){.mesl-header,.mesl-footer,.mesl-cover,.mesl-meaning,.mesl-guide-section,.mesl-help-strip{padding-left:23px;padding-right:23px}.mesl-header{min-height:100px;gap:14px;align-items:flex-start;padding-top:20px;padding-bottom:18px;flex-direction:column}.mesl-header nav{gap:25px;font-size:13px}.mesl-wordmark{font-size:24px}.mesl-wordmark small{font-size:9px}.mesl-cover{grid-template-columns:1fr;padding-top:32px;padding-bottom:35px;gap:29px}.mesl-cover h1{font-size:37px;letter-spacing:-1px}.mesl-cover .mesl-kicker{margin-bottom:13px}.mesl-intro{font-size:16px;margin-top:17px}.mesl-primary{margin-top:21px}.mesl-cover-note{display:none}.mesl-cover-photo img{aspect-ratio:1.45;object-position:center 73%}.mesl-cover-photo figcaption{font-size:10px}.mesl-meaning{padding-top:34px;padding-bottom:35px}.mesl-section-heading h2{font-size:25px;margin-bottom:10px}.mesl-purpose-pair{grid-template-columns:1fr 1fr;margin-top:9px}.mesl-purpose-pair>div{padding:0 12px}.mesl-purpose-pair code{font-size:16px}.mesl-purpose-pair p{font-size:13px}.mesl-meaning>.mesl-text-link{margin-top:8px}.mesl-help-strip{grid-template-columns:1fr;gap:17px}.mesl-help-strip>a{grid-column:1}.mesl-help-strip .mesl-kicker{margin-bottom:8px}.mesl-guide-section{padding-top:36px;padding-bottom:42px;gap:22px}.mesl-home-guides{grid-template-columns:1fr;gap:28px}.mesl-home-guides h2{font-size:22px}.mesl-page,.mesl-reading{padding:35px 23px 55px}.mesl-page h1{font-size:31px}.mesl-page>h2{font-size:23px;margin-top:34px}.mesl-answer{font-size:16px;padding:17px!important;margin-top:21px!important}.mesl-result-pairs>div{grid-template-columns:1fr;gap:10px;padding:22px 0}.mesl-guide-index .mesl-guide-entry{display:block}.mesl-guide-index .mesl-guide-entry time{margin-top:15px}.mesl-note-head h1{font-size:31px;letter-spacing:-.7px}.mesl-note-body{margin-top:29px}.mesl-note-body h2{font-size:23px;margin-top:33px}.mesl-note-body p{font-size:16px}.mesl-note-related{flex-direction:column;gap:20px}.mesl-footer{padding-top:30px;gap:19px}.mesl-footer nav{gap:19px}.mesl-compare-table{margin:24px 0}th,td{padding:11px 7px;font-size:12px}tbody th{font-size:11px}.mesl-source-note{margin-top:35px}.mesl-source-note p{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}