:root{--color-text:#1e2430;--color-muted:#5c6270;--color-navy:#1b3a6b;--color-navy-dark:#0f2648;--color-red:#b23a2e;--color-bg:#faf7f0;--color-soft:#f1ebdd;--color-line:#e3dcca;--color-line-strong:#cfc5ae;--color-hero:#3e4a5c;--font-serif:"Noto Serif SC", "Songti SC", serif;--font-sans:"Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--wrap:75rem}*{box-sizing:border-box}body{min-height:100dvh;font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);flex-direction:column;margin:0;line-height:1.8;display:flex}a{color:var(--color-navy)}a:hover{color:var(--color-navy-dark)}h1,h2,h3{font-family:var(--font-serif);color:var(--color-navy);text-wrap:balance;font-weight:900;line-height:1.4}p,li{text-wrap:pretty}img{max-width:100%;height:auto}.wrap{max-width:var(--wrap);margin:0 auto;padding:0 1.5rem}.draft-banner{background:var(--color-red);color:#fff;text-align:center;padding:.5rem 1rem;font-size:.875rem}.site-header{z-index:10;border-bottom:1px solid var(--color-line);background:#fff;position:sticky;top:0}html{scroll-padding-top:6.5rem}@media (width<=48rem){html{scroll-padding-top:5rem}}.header-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem 2rem;min-height:5.25rem;padding-block:.625rem;display:flex}.brand{color:inherit;align-items:center;gap:.875rem;text-decoration:none;display:flex}.brand-zh{font-family:var(--font-serif);letter-spacing:2px;color:var(--color-navy);white-space:nowrap;font-size:1.375rem;font-weight:900;line-height:1.4;display:block}.brand-en{color:var(--color-muted);font-size:.75rem;line-height:1.4;display:block}.menu-toggle{display:none}@media (width<=48rem){.header-inner{grid-template-columns:minmax(0,1fr) auto;min-height:4rem;display:grid}.brand{gap:.625rem;min-width:0}.brand img{flex:none;width:clamp(36px,13vw,52px);height:auto}.brand-en{display:none}.brand-zh{letter-spacing:1px;font-size:clamp(1.0625rem,5.2vw,1.25rem)}.js .menu-toggle{width:2.75rem;height:2.75rem;color:var(--color-navy);border:1px solid var(--color-line-strong);cursor:pointer;background:0 0;place-items:center;padding:0;display:grid}.js .menu-toggle[aria-expanded=true]{color:#fff;background:var(--color-navy);border-color:var(--color-navy)}.site-header nav{grid-column:1/-1}.js .menu-toggle[aria-expanded=false]+nav{display:none}.site-header nav ul{flex-direction:column;align-items:stretch;gap:0}.site-header nav li{border-top:1px solid var(--color-line)}.site-header nav a{padding:.75rem 0;display:block}}.site-header ul{flex-wrap:wrap;align-items:center;gap:.5rem 1.625rem;margin:0;padding:0;list-style:none;display:flex}.site-header nav a{color:var(--color-text);font-size:.9375rem;text-decoration:none}.site-header nav a:hover,.site-header nav a[aria-current=page]{color:var(--color-navy)}.site-header nav a[aria-current=page]{font-weight:700}.site-header nav .lang-switch{color:var(--color-muted)}.site-header nav .portal-link{border:1px solid var(--color-line-strong);color:var(--color-navy);padding:.25rem .75rem}.site-header nav .portal-link:hover{border-color:var(--color-navy)}@media (width<=48rem){.site-header nav .portal-link{border:0;padding:.75rem 0}}main{flex:1 0 auto;width:100%}main.wrap{padding-block:3rem 5rem}main h1{margin:0 0 1.5rem;font-size:2.25rem}main h2{margin:2.5rem 0 1rem;font-size:1.625rem}.eyebrow{letter-spacing:3px;color:var(--color-red);font-size:.8125rem;font-weight:700}.prose{max-width:46rem}.prose h2{font-size:1.375rem}.prose section:first-child h2{margin-top:0}.review{color:var(--color-red);white-space:nowrap;font-size:.8125rem}.nowrap{white-space:nowrap}.muted{color:var(--color-muted)}.placeholder{color:var(--color-muted);background:var(--color-soft);border:1px dashed var(--color-line-strong);padding:.75rem 1rem}.btn{padding:.875rem 1.75rem;font-size:1rem;font-weight:700;text-decoration:none;display:inline-block}.btn-red{background:var(--color-red);color:#fff}.btn-red:hover{color:#fff;background:#922e24}.btn-light{background:var(--color-bg);color:var(--color-navy)}.link-arrow{border-bottom:1px solid;padding-bottom:2px;font-weight:500;text-decoration:none}.cards{grid-template-columns:repeat(auto-fill,minmax(17rem,1fr));gap:1.5rem;padding:0;list-style:none;display:grid}.card{border:1px solid var(--color-line);background:#fff;padding:1.25rem 1.5rem}.card h3{margin-top:0;font-size:1.25rem}.subnav-wrap{margin:0 0 2rem;position:relative}.subnav{scrollbar-width:none;box-shadow:inset 0 -1px 0 var(--color-line);gap:1.75rem;margin:0;padding:0;list-style:none;display:flex;position:relative;overflow-x:auto}.subnav::-webkit-scrollbar{display:none}.subnav li{flex:none}.subnav a{white-space:nowrap;color:var(--color-text);border-bottom:2px solid #0000;padding:.25rem 0 .625rem;text-decoration:none;display:block}.subnav .bk-open{margin-left:-.5em}.subnav .bk-close{margin-right:-.5em}.subnav a[aria-current=page]{color:var(--color-red);border-bottom-color:var(--color-red);font-weight:700}.subnav-arrow{z-index:1;width:2.75rem;font:inherit;color:var(--color-navy);cursor:pointer;border:0;padding:0;font-size:1.75rem;line-height:1;display:none;position:absolute;top:0;bottom:1px}.subnav-prev{text-align:left;background:linear-gradient(to right, var(--color-bg) 55%, transparent);left:0}.subnav-next{text-align:right;background:linear-gradient(to left, var(--color-bg) 55%, transparent);right:0}.can-prev .subnav-prev,.can-next .subnav-next{display:block}.split{border-top:1px solid var(--color-line);grid-template-columns:repeat(4,minmax(0,1fr));column-gap:2rem;padding-block:2rem;display:grid}.subnav-wrap+.split{border-top:0;padding-top:0}.split>h2{grid-column:1;margin:0;font-size:1.375rem}.split>.split-body{grid-column:2/-1;max-width:46rem}.split-body>:first-child{margin-top:0}.split-body>:last-child{margin-bottom:0}@media (width<=48rem){.split{grid-template-columns:minmax(0,1fr);row-gap:1rem}.split>.split-body{grid-column:1}}.timeline{border-left:2px solid var(--color-line-strong);padding:0;list-style:none}.timeline li{padding:0 0 1.25rem 1.5rem;position:relative}.timeline li:before{content:"";background:var(--color-red);width:10px;height:10px;position:absolute;top:.55rem;left:-6px}.timeline time{font-family:var(--font-serif);color:var(--color-navy);font-weight:700;display:block}table{border-collapse:collapse;width:100%}th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--color-line);padding:.4rem .6rem}th{white-space:nowrap;width:8rem}details{border:1px solid var(--color-line);background:#fff;margin-bottom:.5rem;padding:.5rem 1rem}summary{cursor:pointer;font-family:var(--font-serif);color:var(--color-navy);font-weight:700}.site-footer{background:var(--color-navy);color:#d9dee7;padding-block:2.5rem 1.5rem;font-size:.875rem;line-height:1.9}.site-footer a{color:#fff}.footer-inner{flex-wrap:wrap;justify-content:space-between;gap:1.5rem 4rem;display:flex}.footer-inner p{margin:0}.footer-title{font-family:var(--font-serif);color:#fff;letter-spacing:2px;font-size:1.1875rem;font-weight:900}.footer-title+p{margin-top:.5rem}.footer-label{color:#fff;font-weight:700}.footer-links{margin:.25rem 0 0;padding:0;list-style:none}.footer-en{color:#aab4c4;font-size:.8125rem}.footer-copy p{color:#aab4c4;border-top:1px solid #ffffff26;margin:2rem 0 0;padding-top:1.25rem;font-size:.8125rem}.print-only{display:none}@media print{.draft-banner,.site-header,.site-footer,.subnav-wrap,.no-print{display:none!important}.print-only{display:block}body{background:#fff}main.wrap{padding:0}main h1{display:none}}