:root{--ink:#101f30;--ink-2:#172a3d;--slate:#334155;--orange:#ff6b00;--pale:#e0f2fe;--white:#f7fbff;--muted:#9fb0c3;--line:rgba(224,242,254,.16);--shell:min(1140px,calc(100% - 40px));--serif:"Noto Serif SC","Songti SC",STSong,serif;--sans:"Microsoft YaHei","PingFang SC",Arial,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--white);color:var(--ink);font:16px/1.8 var(--sans);letter-spacing:0}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.shell{width:var(--shell);margin-inline:auto}
.skip-link{position:fixed;z-index:30;top:8px;left:8px;transform:translateY(-160%);padding:8px 14px;background:var(--orange);color:#fff;font-weight:700}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;z-index:20;top:0;background:rgba(16,31,48,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:10px;min-width:192px}
.brand img{width:46px;height:46px;object-fit:contain}
.brand span{display:grid;line-height:1.15}
.brand strong{font-size:17px;color:var(--pale);font-family:var(--serif);font-weight:700}
.brand small{margin-top:5px;color:#7890a8;font:700 9px/1.15 Arial;letter-spacing:1.4px}
.primary-nav{display:flex;align-items:center;justify-content:flex-end;gap:19px;color:#cad8e6;font-size:14px;font-weight:700;white-space:nowrap}
.primary-nav>a{display:inline-flex;align-items:center;gap:6px}
.primary-nav>a:not(.nav-action){padding:6px 8px;border:1px solid transparent;transition:color .2s,border-color .2s,box-shadow .2s,background .2s}
.primary-nav>a:not(.nav-action):hover,.primary-nav>a:not(.nav-action):focus-visible{border-color:var(--pale);background:rgba(224,242,254,.07);box-shadow:0 0 12px rgba(224,242,254,.24);color:var(--pale);outline:none}
.nav-action{display:inline-flex;align-items:center;gap:5px;padding:8px 13px;background:var(--orange);color:#fff;font-size:13px;transition:transform .2s,box-shadow .2s}
.nav-action:hover,.nav-action:focus-visible{transform:translateY(-2px);box-shadow:0 5px 13px rgba(255,107,0,.25);outline:none}
.nav-toggle{display:none;background:none;border:0;padding:10px;cursor:pointer}
.nav-toggle .lucide{display:block;width:23px;height:23px;color:var(--pale);stroke-width:2}
.hero{position:relative;isolation:isolate;overflow:hidden;min-height:670px;background:var(--ink);color:#fff}
.hero-grid{position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(224,242,254,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(224,242,254,.06) 1px,transparent 1px);background-size:52px 52px;mask-image:linear-gradient(90deg,#000 15%,transparent 80%)}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(16,31,48,.96) 0%,rgba(16,31,48,.85) 35%,rgba(16,31,48,.22) 71%,rgba(16,31,48,.4) 100%)}
.hero-content{position:relative;padding:118px 0 72px;max-width:1140px}
.eyebrow{display:flex;align-items:center;gap:9px;margin:0 0 15px;color:var(--orange);font-size:12px;font-weight:800;letter-spacing:1.3px}
.eyebrow span{width:24px;height:2px;background:currentColor}
.hero h1,h2,h3{font-family:var(--serif);line-height:1.2}
.hero h1{max-width:720px;margin:0;font-size:clamp(34px,4.4vw,58px);letter-spacing:0}
.hero h1 em{color:var(--pale);font-style:normal}
.hero-lead{max-width:560px;margin:24px 0 28px;color:#cedbe7;font-size:17px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:48px;padding:10px 19px;font-weight:800;transition:transform .2s,background .2s}
.primary-nav .lucide,.button .lucide,.text-link .lucide,.back-top .lucide{width:16px;height:16px;flex:0 0 auto;stroke-width:1.9}
.button:hover{transform:translateY(-2px)}
.button-primary{background:var(--orange);color:#fff}
.button-primary:hover{background:#e85f00}
.button-quiet{border:1px solid rgba(224,242,254,.34);color:var(--pale)}
.button-quiet:hover{background:rgba(224,242,254,.1)}
.signal-list{display:flex;gap:30px;margin:67px 0 0;padding:0;list-style:none}
.signal-list li{display:grid;gap:2px;min-width:110px}
.signal-list b{color:var(--pale);font:700 25px/1 var(--serif)}
.signal-list span{color:#9fb0c3;font-size:12px}
.hero-media{position:absolute;z-index:-2;top:0;right:0;width:min(63vw,920px);height:100%;margin:0}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-media figcaption,.framed-media figcaption,.feature-media figcaption{position:absolute;right:16px;bottom:13px;color:#d7ecfb;font:700 10px/1 Arial;letter-spacing:1.5px}
.section{padding:104px 0}
.section-dark{background:var(--ink);color:#e6f1fa}
.split-layout{display:grid;grid-template-columns:minmax(280px,.82fr) minmax(0,1.18fr);gap:80px}
.intro-heading{margin-bottom:39px}
.intro-layout{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(320px,.88fr);gap:60px;align-items:center}
.intro-media{position:relative;margin:0;overflow:hidden;border:1px solid #c9d7e2;border-radius:8px;background:var(--ink);transition:transform .25s,border-color .25s,box-shadow .25s}
.intro-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s}
.intro-media:hover{border-color:var(--pale);box-shadow:0 12px 28px rgba(16,31,48,.2);transform:translateY(-4px)}
.intro-media:hover img{transform:scale(1.045)}
.intro-media figcaption{position:absolute;right:12px;bottom:11px;padding:4px 7px;background:rgba(16,31,48,.78);color:var(--pale);font:700 10px/1.2 Arial;letter-spacing:1.2px}
.section-title h2,.section-heading h2,.guide-layout h2,.evidence-grid h2,.faq-layout h2{margin:0;font-size:clamp(27px,3vw,40px);letter-spacing:0}
.prose{font-size:17px;color:#42556a}
.prose p:first-child{margin-top:0}
.fact-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.fact-row span{border:1px solid #cad7e2;padding:5px 10px;color:#52687e;font-size:13px}
.section-heading{display:flex;justify-content:space-between;gap:50px;align-items:end;margin-bottom:42px}
.section-heading>p{max-width:420px;margin:0;color:#9fb0c3}
.content-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.content-card{min-height:227px;padding:29px 27px;background:var(--ink-2);border:1px solid var(--line);transition:background .2s,transform .2s}
.content-card:hover{background:#1d3349;transform:translateY(-3px)}
.content-card>span{color:var(--orange);font:700 12px Arial}
.content-card h3{margin:47px 0 9px;color:var(--pale);font-size:24px}
.content-card p{margin:0;color:#afbdcb;font-size:14px;line-height:1.7}
.card-image{position:relative;overflow:hidden;padding:0}
.card-image::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(16,31,48,.96),rgba(16,31,48,.08) 72%)}
.card-image img{width:100%;height:100%;object-fit:cover}
.card-image>div{position:absolute;z-index:1;inset:auto 27px 25px}
.card-image h3{margin:20px 0 7px}
.wide-card{grid-column:span 2;min-height:auto}
.wide-card h3{margin-top:20px}
.guide-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}
.framed-media{position:sticky;top:101px;margin:0;background:var(--ink);padding:12px 12px 38px}
.framed-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.framed-media figcaption{bottom:15px;left:20px;right:auto}
.guide-intro{color:#52687e}
.route-list{margin:27px 0;padding:0;list-style:none;border-top:1px solid #d7e1e9}
.route-list li{display:grid;grid-template-columns:50px 1fr;gap:16px;padding:20px 0;border-bottom:1px solid #d7e1e9}
.route-list b{color:var(--orange);font:700 13px Arial}
.route-list h3{margin:0 0 3px;font-size:19px}
.route-list p{margin:0;color:#61758a;font-size:14px}
.text-link{display:inline-flex;gap:9px;margin-top:24px;color:var(--orange);font-weight:800;border-bottom:1px solid currentColor}
.evidence-section{background:#dcebf3}
.evidence-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,.8fr);gap:75px;align-items:center}
.evidence-grid>div>p:not(.eyebrow){color:#4b6074}
.feature-list{margin-top:31px;border-top:1px solid #b4c8d6}
.feature-list>div{display:grid;grid-template-columns:44px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid #b4c8d6}
.feature-list b{color:var(--orange);font:700 12px Arial}
.feature-list span{color:#587086;font-size:14px;line-height:1.6}
.feature-list strong{display:block;color:var(--ink);font-family:var(--serif);font-size:18px}
.feature-media{position:relative;margin:0}
.feature-media img{width:100%;aspect-ratio:4/5;object-fit:cover}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-left:1px solid var(--line)}
.timeline article{position:relative;padding:0 23px 0 25px;border-right:1px solid var(--line)}
.timeline article::before{content:"";position:absolute;top:0;left:-5px;width:9px;height:9px;background:var(--orange)}
.timeline time{color:var(--orange);font-size:13px;font-weight:800}
.timeline h3{margin:17px 0 12px;color:var(--pale);font-size:21px}
.timeline p{margin:0;color:#9fb0c3;font-size:14px;line-height:1.75}
.gallery-section{padding-bottom:84px}
.section-heading.compact{margin-bottom:26px}
.gallery{display:grid;grid-template-columns:minmax(0,2.05fr) minmax(340px,.95fr);gap:16px;align-items:stretch}
.screenshot-main{position:relative;min-height:0;margin:0;overflow:hidden;border:1px solid #c9d5df;border-radius:8px;background:var(--ink);aspect-ratio:16/9}
.screenshot-main img{width:100%;height:100%;object-fit:cover}
.screenshot-main figcaption{position:absolute;right:15px;bottom:13px;padding:4px 8px;background:rgba(16,31,48,.78);color:var(--pale);font:700 10px/1.3 Arial;letter-spacing:1.3px}
.gallery-thumbnails{display:grid;grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(3,1fr);gap:12px;min-height:0}
.screenshot-thumb{min-width:0;height:100%;padding:0;overflow:hidden;border:1px solid #c9d5df;border-radius:8px;background:var(--ink);cursor:pointer;transition:border-color .2s,transform .2s,opacity .2s}
.screenshot-thumb img{width:100%;height:100%;object-fit:cover;opacity:.72;transition:opacity .2s,transform .35s}
.screenshot-thumb:hover,.screenshot-thumb:focus-visible{border-color:var(--pale);outline:none}
.screenshot-thumb:hover img,.screenshot-thumb:focus-visible img{opacity:1;transform:scale(1.05)}
.screenshot-thumb[aria-pressed="true"]{border-color:var(--orange);box-shadow:0 0 0 2px rgba(255,107,0,.22)}
.screenshot-thumb[aria-pressed="true"] img{opacity:1}
.faq-section{background:#f0f7fa}
#updates .section-heading{display:block}
#updates .section-heading>p{margin-top:16px}
.faq-layout{display:block!important}
.faq-layout>div:first-child{margin-bottom:38px}
.faq-layout>div:first-child>p:not(.eyebrow){max-width:620px;color:#52687e}
.faq-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:100px;align-items:start}
.faq-layout>div>p:not(.eyebrow){color:#52687e}
.faq-layout .button{margin-top:19px}
.faq-list{border-top:1px solid #bfceda}
.faq-list details{border-bottom:1px solid #bfceda}
.faq-list summary{display:flex;justify-content:space-between;gap:16px;padding:20px 0;cursor:pointer;color:var(--ink);font-family:var(--serif);font-size:19px;font-weight:700;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary .lucide{width:21px;height:21px;flex:0 0 auto;color:var(--orange);stroke-width:2;transition:transform .2s}
.faq-list details[open] summary .lucide{transform:rotate(45deg)}
.faq-list p{margin:0 35px 19px 0;color:#61758a;font-size:14px}
.site-footer{background:#0c1926;color:#94a9bd}
.footer-wrap{display:flex;align-items:center;justify-content:space-between;gap:25px;min-height:128px}
.footer-wrap p{max-width:450px;margin:0;font-size:13px}
.back-top{display:inline-flex;align-items:center;gap:7px;color:var(--pale);font-size:13px;font-weight:800}
.friend-links{padding:44px 0 46px;background:var(--ink);border-top:1px solid var(--line);color:var(--pale);text-align:center}
.friend-links h2{margin:0 0 17px;font-size:25px;letter-spacing:0}
.friend-link-list{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
.friend-link-list a{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:8px 17px;border:1px solid rgba(224,242,254,.3);border-radius:22px;background:rgba(224,242,254,.09);color:var(--pale);font-size:14px;font-weight:700;line-height:1.4;transition:transform .2s,border-color .2s,background .2s,box-shadow .2s}
.friend-link-list a:hover,.friend-link-list a:focus-visible{border-color:var(--pale);background:rgba(224,242,254,.17);box-shadow:0 0 14px rgba(224,242,254,.18);outline:none;transform:translateY(-2px)}
.floating-detail{position:fixed;z-index:19;right:24px;bottom:24px;display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:10px 16px;border:1px solid rgba(255,255,255,.28);border-radius:5px;background:var(--orange);box-shadow:0 8px 22px rgba(16,31,48,.28);color:#fff;font-size:14px;font-weight:800;transition:transform .2s,box-shadow .2s,background .2s}
.floating-detail .lucide{width:17px;height:17px;flex:0 0 auto;stroke-width:2}
.floating-detail:hover,.floating-detail:focus-visible{background:#e85f00;box-shadow:0 12px 28px rgba(16,31,48,.36);outline:none;transform:translateY(-3px)}
/* Shared hover treatment for standalone content modules. */
.content-card,.framed-media,.feature-media,.timeline article,.screenshot-main,.faq-list details{transition:transform .25s,border-color .25s,box-shadow .25s,background .25s}
.framed-media,.feature-media{overflow:hidden;border:1px solid transparent;border-radius:8px}
.card-image img,.framed-media img,.feature-media img,.screenshot-main img{transition:transform .4s}
@media (hover:hover){
  .content-card:hover,.framed-media:hover,.feature-media:hover,.timeline article:hover,.screenshot-main:hover{border-color:var(--pale);box-shadow:0 12px 28px rgba(16,31,48,.22);transform:translateY(-4px)}
  .content-card:hover{background:#1d3349}
  .timeline article:hover{z-index:1;background:rgba(224,242,254,.06)}
  .faq-list details:hover{border-color:#8faebe;background:rgba(224,242,254,.5);box-shadow:0 8px 18px rgba(47,70,89,.1);transform:translateY(-2px)}
  .card-image:hover img,.framed-media:hover img,.feature-media:hover img,.screenshot-main:hover img{transform:scale(1.045)}
}
@media (max-width:1000px){.primary-nav{gap:12px;font-size:13px}
.hero-media{width:67vw}
.split-layout,.guide-layout{gap:50px}
.intro-layout{gap:45px}
.evidence-grid{gap:45px}
.faq-layout{gap:55px}
.timeline article{padding:0 14px 0 18px}
}
@media (max-width:760px){:root{--shell:min(100% - 32px,1140px)}
.nav-wrap{min-height:64px}
.nav-toggle{display:block}
.primary-nav{display:none;position:absolute;top:64px;left:0;width:100%;padding:15px 16px 18px;background:var(--ink);border-bottom:1px solid var(--line);align-items:stretch;gap:1px}
.primary-nav.is-open{display:flex;flex-direction:column}
.primary-nav>a:not(.nav-action){padding:9px 10px}
.primary-nav .nav-action{margin-top:8px;padding:10px 12px;justify-content:center}
.hero{min-height:690px}
.hero::after{background:linear-gradient(90deg,rgba(16,31,48,.94),rgba(16,31,48,.72))}
.hero-media{width:100%;opacity:.48}
.hero-content{padding:101px 0 50px}
.hero h1{font-size:35px}
.hero-lead{font-size:16px}
.signal-list{gap:16px;margin-top:50px}
.signal-list li{min-width:85px}
.section{padding:70px 0}
.split-layout,.guide-layout,.evidence-grid,.faq-layout,.intro-layout{grid-template-columns:1fr;gap:31px}
.section-heading{display:block;margin-bottom:28px}
.section-heading>p{margin-top:16px}
.prose{font-size:16px}
.intro-heading{margin-bottom:28px}
.content-grid{grid-template-columns:1fr 1fr;gap:10px}
.content-card{min-height:220px;padding:22px 18px}
.content-card h3{margin-top:37px;font-size:21px}
.card-image>div{inset:auto 18px 19px}
.wide-card{grid-column:span 2}
.framed-media{position:relative;top:auto;order:2}
.guide-layout>div{order:1}
.evidence-grid{gap:37px}
.feature-media{order:2}
.feature-media img{aspect-ratio:16/10}
.timeline{grid-template-columns:1fr 1fr;gap:35px 0}
.timeline article{min-height:177px}
.gallery{grid-template-columns:1fr;gap:12px}
.screenshot-main{min-height:0;aspect-ratio:16/9}
.gallery-thumbnails{grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(3,1fr)}
.footer-wrap{min-height:0;padding:28px 0;align-items:flex-start;flex-wrap:wrap}
.footer-wrap p{order:3;width:100%}
.friend-links{padding:38px 0 40px}
.friend-links h2{font-size:23px}
.friend-link-list{gap:9px}
.friend-link-list a{min-height:39px;padding:7px 13px;font-size:13px}
.floating-detail{right:16px;bottom:calc(16px + env(safe-area-inset-bottom));min-height:44px;padding:9px 13px;font-size:13px}
}
@media (max-width:440px){.brand{min-width:0}
.brand img{width:39px;height:39px}
.brand strong{font-size:15px}
.brand small{font-size:8px}
.hero h1{font-size:30px}
.signal-list{gap:11px}
.signal-list b{font-size:22px}
.signal-list span{font-size:11px}
.content-grid{grid-template-columns:1fr}
.wide-card{grid-column:auto}
.content-card,.wide-card{min-height:auto}
.card-image{min-height:230px}
.timeline{grid-template-columns:1fr;gap:30px}
.timeline article{min-height:0}
.faq-list summary{font-size:17px}
.section-title h2,.section-heading h2,.guide-layout h2,.evidence-grid h2,.faq-layout h2{font-size:28px}
}