:root{
--slate:#eef1f5;
--card:#ffffff;
--ink:#1b2331;
--mute:#5c6a7d;
--line:#d9e0e9;
--indigo:#2b3a67;
--verm:#e2664a;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--slate);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",Arial,sans-serif}
h1,h2,h3,h4,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.top{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line)}
.top__in{max-width:1160px;margin:0 auto;padding:0 26px;height:66px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:22px}
.nav{display:flex;gap:20px;font-size:14.5px;color:var(--mute)}
.nav a{padding:4px 0;border-bottom:2px solid transparent;white-space:nowrap}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{color:var(--indigo);border-bottom-color:var(--verm);font-weight:600}
.brand{display:inline-flex;align-items:center;gap:9px;justify-self:center;font-size:17px;white-space:nowrap}
.brand__mark{display:block;width:30px;height:30px;flex:0 0 auto}
.brand b{font-weight:700}
.btnx{display:inline-flex;align-items:center;justify-content:center;justify-self:end;padding:10px 22px;background:var(--indigo);color:#fff;font-size:14.5px;font-weight:600;border-radius:6px;white-space:nowrap;flex:0 0 auto}
.btnx:hover{background:#1f2c51}
.btnx--lg{padding:14px 30px;font-size:16px;justify-self:start}
.hero{background:#fff;border-bottom:1px solid var(--line)}
.hero__in{max-width:1160px;margin:0 auto;padding:58px 26px 62px;display:grid;grid-template-columns:minmax(0,1.16fr) minmax(0,.84fr);gap:52px;align-items:center}
.kicker{font-size:12px;letter-spacing:.2em;color:var(--verm);font-weight:700;margin-bottom:14px}
h1{font-size:40px;line-height:1.28;font-weight:700}
.lead{margin-top:20px;color:var(--mute);font-size:16.5px;max-width:35em}
.points{margin-top:22px;border-top:1px solid var(--line)}
.points li{position:relative;padding:9px 0 9px 18px;font-size:14.5px;color:#3a4658;border-bottom:1px solid var(--line)}
.points li::before{content:"";position:absolute;left:0;top:17px;width:6px;height:6px;background:var(--verm);border-radius:1px}
.hero__acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.lnk{display:inline-flex;align-items:center;padding:13px 24px;font-size:15px;color:var(--indigo);border:1px solid var(--line);border-radius:6px;background:#f7f9fc}
.lnk:hover{border-color:var(--indigo)}
.hero__fig img{width:100%;height:auto;max-width:250px;margin:0 auto;border-radius:10px;border:1px solid var(--line)}
.hero__fig figcaption{margin-top:12px;text-align:center;font-size:13px;color:var(--mute)}
.layout{max-width:1160px;margin:0 auto;padding:0 26px;display:grid;grid-template-columns:186px minmax(0,1fr);gap:44px;align-items:start}
.toc{position:sticky;top:92px;padding:34px 0 0;font-size:14px}
.toc p{font-size:12px;letter-spacing:.18em;color:var(--verm);font-weight:700;margin-bottom:12px}
.toc a{display:block;color:var(--mute);padding:6px 0 6px 12px;border-left:2px solid var(--line)}
.toc a:hover{color:var(--indigo);border-left-color:var(--verm)}
.layout__main{padding-top:8px}
.blk{padding:52px 0 44px;border-bottom:1px solid var(--line)}
.blk:last-child{border-bottom:0}
h2{font-size:27px;line-height:1.4;font-weight:700}
.sub{margin-top:10px;color:var(--mute);font-size:15.5px;max-width:38em}
.picks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:30px}
.pick{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--indigo);padding:22px 22px 20px}
.pick h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.pick p{font-size:14.6px;color:var(--mute)}
.strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:30px;background:var(--card);border:1px solid var(--line)}
.cell{padding:18px 14px 16px;border-right:1px solid var(--line);display:flex;flex-direction:column}
.cell:last-child{border-right:0}
.cell img{width:100%;height:auto;border:1px solid var(--line);border-radius:4px}
.cell figcaption{margin-top:auto;padding-top:10px;font-size:12.5px;line-height:1.55;color:var(--mute)}
.talk{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:30px}
.talk blockquote{background:var(--card);border:1px solid var(--line);padding:20px 20px 18px}
.talk blockquote p{font-size:14.5px;color:#374254}
.talk cite{display:block;margin-top:12px;font-size:12.5px;color:var(--mute);font-style:normal}
.qa{margin-top:26px;background:var(--card);border:1px solid var(--line);padding:0 22px}
.qa details{border-bottom:1px solid var(--line)}
.qa details:last-child{border-bottom:0}
.qa summary{cursor:pointer;list-style:none;position:relative;padding:17px 34px 17px 0;font-size:15.5px;font-weight:600}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";position:absolute;right:2px;top:14px;font-size:19px;color:var(--verm)}
.qa details[open] summary::after{content:"−"}
.qa p{padding:0 0 18px;font-size:14.8px;color:var(--mute);max-width:42em}
.end{background:var(--indigo);color:#fff}
.end__in{max-width:760px;margin:0 auto;padding:60px 26px;text-align:center}
.end h2{color:#fff}
.end p{margin:12px auto 24px;color:#c3cddd;font-size:15.5px;max-width:30em}
.end .btnx--lg{background:var(--verm);justify-self:auto}
.end .btnx--lg:hover{background:#c9543a}
.bot{background:#18202e;color:#a9b4c4}
.bot__in{max-width:1160px;margin:0 auto;padding:26px;display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.bot__brand{display:inline-flex;align-items:center;gap:9px;color:#e7ecf4}
.bot__brand img{width:30px;height:30px}
.bot__nav{display:flex;flex-wrap:wrap;gap:18px;font-size:14px;margin-left:auto}
.bot__nav a:hover{color:#fff}
.bot__cr{font-size:12.5px;color:#7b8798;width:100%;border-top:1px solid rgba(255,255,255,.1);padding-top:14px}
.bot__disc{border-top:1px solid rgba(255,255,255,.1)}
.bot__disc p{max-width:1160px;margin:0 auto;padding:14px 26px 20px;font-size:12.5px;color:#7b8798}
.page{background:#fff;border-bottom:1px solid var(--line)}
.page__in{max-width:860px;margin:0 auto;padding:46px 26px 44px}
.page h1{font-size:32px}
.page .lead{max-width:42em}
.art{max-width:860px;margin:0 auto;padding:44px 26px 8px}
.art h2{font-size:22px;margin:38px 0 12px}
.art h2:first-child{margin-top:0}
.art h3{font-size:17px;font-weight:700;margin:24px 0 8px}
.art p{font-size:15.5px;color:#39445a;margin:12px 0;max-width:44em}
.tip{margin:20px 0;padding:14px 18px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--verm);font-size:14.5px;color:#39445a}
.infig{margin:26px auto;max-width:250px}
.infig img{width:auto;max-width:100%;height:auto;margin:0 auto;border:1px solid var(--line);border-radius:8px}
.infig figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--mute)}
@keyframes fadein{from{opacity:0}to{opacity:1}}
.hero__txt{animation:fadein .75s ease both}
.hero__fig{animation:fadein .9s .1s ease both}
@media (prefers-reduced-motion:reduce){.hero__txt,.hero__fig{animation:none;opacity:1}}
@media (max-width:980px){
.hero__in{grid-template-columns:1fr;gap:34px;padding:44px 24px 50px}
h1{font-size:32px}
.layout{grid-template-columns:1fr;gap:0;padding:0 24px}
.toc{display:none}
.strip{grid-template-columns:repeat(2,minmax(0,1fr))}
.cell:nth-child(2n){border-right:0}
.cell:nth-child(n+3){border-top:1px solid var(--line)}
.talk{grid-template-columns:1fr}
.page h1{font-size:28px}
}
@media (max-width:620px){
.top__in{grid-template-columns:1fr auto;height:auto;padding:11px 18px;row-gap:8px}
.brand{justify-self:start;grid-column:1;grid-row:1}
.btnx{grid-column:2;grid-row:1;padding:9px 16px;font-size:14px}
.nav{grid-column:1/-1;grid-row:2;gap:16px;font-size:13.5px;overflow-x:auto}
.hero__in{padding:32px 18px 38px;gap:28px}
h1{font-size:26px}
.lead{font-size:15.5px}
.hero__fig img{max-width:220px}
.layout{padding:0 18px}
.blk{padding:38px 0 32px}
h2{font-size:22px}
.picks{grid-template-columns:1fr;gap:14px}
.strip{grid-template-columns:1fr}
.cell{border-right:0;border-top:1px solid var(--line)}
.cell:first-child{border-top:0}
.qa{padding:0 16px}
.end__in{padding:44px 18px}
.bot__in{padding:20px 18px}
.bot__nav{margin-left:0}
.bot__disc p{padding:12px 18px 18px}
.page__in,.art{padding-left:18px;padding-right:18px}
.art h2{font-size:20px}
}
.ios{display:inline-flex;align-items:center;justify-content:center;padding:9px 18px;font-size:14px;font-weight:600;color:var(--indigo);border:1px solid var(--line);border-radius:6px;white-space:nowrap;background:#fff}
.ios:hover{border-color:var(--indigo)}
.top__in{grid-template-columns:auto 1fr auto auto}
.end .lnk{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.end .lnk:hover{border-color:#fff;color:#fff}
@media (max-width:620px){
.top__in{grid-template-columns:1fr auto auto}
.ios{grid-column:2;grid-row:1;padding:8px 11px;font-size:13px}
.btnx{grid-column:3;grid-row:1}
}