/* Base */
:root{--ink:#253b4c;--soft:#edf2f6;--paper:#fcfcfa;--copper:#9b4d2c;--muted:#5b6c78;--line:#ccd6dd}*{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;line-height:1.8}a{color:inherit;text-underline-offset:5px}a:hover{color:var(--copper)}a:focus-visible,summary:focus-visible{outline:3px solid var(--copper);outline-offset:5px}p,h1,h2,h3,figure{margin:0}h1,h2,h3{line-height:1.35}h1,h2{letter-spacing:-.035em}p{color:var(--muted)}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:20px;top:10px;z-index:10;background:white;padding:10px}.frame{width:min(1200px,100% - 96px);margin-inline:auto}.home-band{padding:78px 0}.site-top{border-bottom:1px solid var(--line)}.top-row{display:flex;align-items:center;justify-content:space-between;min-height:90px;gap:25px}.brand{font-size:27px;font-weight:700;text-decoration:none;white-space:nowrap;letter-spacing:-1px}.brand span{font-size:17px;font-weight:500;letter-spacing:-.5px;margin-left:8px}.wide-nav{display:flex;gap:30px;font-size:14px}.wide-nav a{text-decoration:none}[aria-current]{color:var(--copper)}.mobile-menu{display:none}.kicker{font-size:12px;color:var(--copper);font-weight:700;letter-spacing:1px;margin-bottom:18px}.button{min-height:48px;display:inline-flex;align-items:center;justify-content:center;background:var(--ink);color:#fff;padding:11px 22px;font-size:14px;text-decoration:none;border:1px solid var(--ink)}.button:hover{background:var(--copper);color:#fff;border-color:var(--copper)}.button.outline{background:transparent;color:var(--ink)}.button.outline:hover{color:var(--copper);border-color:var(--copper)}
/* Layout and components */
.opening-band{background:var(--soft);padding:42px 0 48px}.opening{display:grid;grid-template-columns:1.08fr 1fr;align-items:center;gap:48px}.opening-copy{grid-column:2;grid-row:1}.opening-image{grid-column:1;grid-row:1}.opening h1{font-size:43px;font-weight:600;line-height:1.35}.opening h1 em{font-style:normal;font-weight:400;color:#526979;display:block;margin-top:16px}.lead{font-size:16px;margin-top:22px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:27px 0 16px}.fine{font-size:12px}.opening-image img{display:block;width:100%;height:470px;object-fit:cover;object-position:43% 50%}.opening-image figcaption{font-size:11px;letter-spacing:1px;margin-top:12px;color:var(--muted)}.section-heading{max-width:670px;margin-bottom:37px}.section-heading h2{font-size:36px;margin-bottom:20px}.section-heading>p:last-child{font-size:16px}.comparison{display:grid;grid-template-columns:1fr 1fr;border-top:2px solid var(--ink);border-bottom:1px solid var(--line)}.comparison>div{padding:32px 40px 35px 0}.comparison>div+div{border-left:1px solid var(--line);padding-left:40px;padding-right:0}.comparison h3{font-size:25px;margin-bottom:12px}.comparison p{font-size:15px}.comparison dl{display:grid;grid-template-columns:85px 1fr;gap:12px 20px;font-size:13px;margin:25px 0}.comparison dt{color:var(--muted)}.comparison dd{margin:0}.comparison a{font-size:13px}.soft-band{background:var(--soft)}.prepare-layout{display:grid;grid-template-columns:1fr 1fr;gap:90px}.prepare-layout h2{font-size:35px;margin-bottom:20px}.prepare-layout .button{margin-top:25px}.preparation{margin:0;padding-left:26px}.preparation li{padding:0 0 24px 13px;border-bottom:1px solid var(--line);margin-bottom:24px}.preparation li:last-child{margin:0;padding-bottom:0;border:0}.preparation h3{font-size:21px;margin-bottom:9px}.preparation p{font-size:14px}.compact{margin-bottom:25px}.reading-list{display:grid;grid-template-columns:1fr 1fr;gap:40px}.reading-entry{display:block;text-decoration:none;border-top:1px solid var(--ink);padding:26px 0}.reading-topic{font-size:12px;color:var(--copper)}.reading-entry h3{font-weight:500;font-size:26px;margin:14px 0 16px;line-height:1.5}.reading-entry p{font-size:14px}.read-label{display:inline-block;font-size:12px;margin-top:21px;text-decoration:underline}.faq-layout{display:grid;grid-template-columns:1fr 1.6fr;gap:65px}.faq-layout h2{font-size:28px}.faq-layout details{padding:0 0 22px;margin:0 0 22px;border-bottom:1px solid var(--line)}.faq-layout summary{cursor:pointer;font-size:17px;list-style:none;text-decoration:underline;text-underline-offset:5px}.faq-layout summary::-webkit-details-marker{display:none}.faq-layout details p{font-size:14px;margin:15px 0 0}.home-band#questions{padding-top:0}.site-bottom{padding:40px 0;background:var(--ink);color:#fff}.footer-row{display:flex;justify-content:space-between;gap:30px}.site-bottom strong{font-size:22px}.site-bottom p{font-size:12px;color:#cdd8df;margin-top:10px}.site-bottom a{font-size:13px}.inner-head{padding:60px 0 35px;max-width:1000px}.inner-head h1{font-size:42px;margin-bottom:25px}.inner-head>p:not(.kicker){font-size:19px;max-width:850px}.inner-head>a{margin-top:24px;display:inline-block}.prose{max-width:850px;width:calc(100% - 96px);margin:0 auto;padding-bottom:70px}.prose h2,.article-content h2{font-size:27px;margin:34px 0 20px}.prose p,.prose ul,.article-content p{font-size:17px;line-height:2;margin-bottom:22px}.article-index{padding-bottom:80px}.article-shell{max-width:900px;width:calc(100% - 96px);margin:auto;padding:55px 0 65px}.guide-article{width:100%}.article-heading{border-bottom:1px solid var(--line);padding-bottom:28px}.article-heading h1{font-size:39px;font-weight:500;line-height:1.45;margin-bottom:22px}.byline{font-size:12px}.article-content{padding-top:30px}.article-content .article-answer{font-size:21px;color:var(--ink)}.article-content section{margin-bottom:36px}.related{border-top:1px solid var(--line);padding-top:25px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}.related a{display:block;line-height:1.8;min-height:42px;font-size:15px}
/* Responsive */
@media(max-width:760px){.frame{width:calc(100% - 40px)}.top-row{min-height:74px;gap:15px}.brand{font-size:22px}.brand span{font-size:13px;margin-left:4px}.wide-nav{display:none}.mobile-menu{display:block;position:relative;font-size:13px}.mobile-menu summary{cursor:pointer;list-style:none;padding:8px 0}.mobile-menu nav{position:absolute;right:0;top:45px;z-index:3;background:var(--paper);border:1px solid var(--line);min-width:180px;padding:12px 18px;box-shadow:0 8px 16px #253b4c18}.mobile-menu nav a,.mobile-menu nav span{display:block;padding:10px 0}.opening-band{padding:28px 0 32px}.opening{display:flex;flex-direction:column;gap:26px;align-items:stretch}.opening h1{font-size:31px}.opening h1 em{margin-top:8px;font-size:31px}.opening h1 em br{display:block}.kicker{font-size:11px;margin-bottom:12px}.lead{font-size:15px;margin-top:17px}.lead br{display:none}.actions{gap:10px;margin:20px 0 12px}.button{font-size:13px;padding:10px 15px;min-height:46px}.fine{font-size:11px}.opening-image img{height:245px;object-position:45% 55%}.opening-image figcaption{font-size:10px;margin-top:8px}.home-band{padding:45px 0}.section-heading{margin-bottom:25px}.section-heading h2{font-size:28px}.section-heading>p:last-child{font-size:15px}.comparison{grid-template-columns:1fr}.comparison>div{padding:25px 0}.comparison>div+div{border-left:0;border-top:1px solid var(--line);padding:25px 0}.comparison h3{font-size:24px}.comparison dl{grid-template-columns:74px 1fr;gap:10px 15px}.prepare-layout{grid-template-columns:1fr;gap:30px}.prepare-layout h2{font-size:29px}.prepare-layout p{font-size:15px}.preparation{padding-left:23px}.preparation li{padding-left:8px}.reading-list{grid-template-columns:1fr;gap:10px}.reading-entry{padding:23px 0}.reading-entry h3{font-size:24px;margin:12px 0}.faq-layout{grid-template-columns:1fr;gap:25px}.faq-layout h2{font-size:27px}.faq-layout summary{font-size:16px}.footer-row{flex-direction:column;gap:26px}.site-bottom{padding:32px 0}.inner-head{padding:36px 0 22px}.inner-head h1{font-size:31px}.inner-head>p:not(.kicker){font-size:18px}.prose{width:calc(100% - 40px);padding-bottom:42px}.prose h2,.article-content h2{font-size:24px}.prose p,.prose ul,.article-content p{font-size:16px}.article-shell{width:calc(100% - 40px);padding:36px 0 45px}.article-heading h1{font-size:29px}.article-content .article-answer{font-size:19px}.article-index{padding-bottom:40px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}