:root{--bg:#0e0c14;--bg2:#12101a;--panel:#17141f;--panel2:#1d1927;--line:rgba(255,255,255,.1);--line-soft:rgba(255,255,255,.06);--text:#fff;--muted:rgba(255,255,255,.57);--purple:#a78bfa;--purple2:#7c3aed;--blue:#60a5fa;--radius:16px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.5;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.2;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:80px 80px;mask-image:linear-gradient(to bottom,#000 0,transparent 85%)}
a{color:inherit;text-decoration:none}
.site-nav{height:72px;position:fixed;top:0;left:0;right:0;z-index:20;background:rgba(14,12,20,.72);backdrop-filter:blur(22px);border-bottom:1px solid transparent;transition:border-color .25s ease,background .25s ease}
.site-nav:hover{border-color:var(--line-soft);background:rgba(14,12,20,.92)}
.nav-inner{width:min(1120px,calc(100% - 48px));height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;letter-spacing:-.03em;font-size:19px;white-space:nowrap}
.brand img{width:28px;height:28px;border-radius:9px;box-shadow:0 6px 20px #0008}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:28px;color:var(--muted);font-size:13px}
.nav-links a{position:relative;transition:color .2s ease}
.nav-links a:hover,.nav-links a[aria-current=page]{color:#fff}
.nav-links a:not(.nav-cta):after{content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;border-radius:2px;background:var(--purple);transform:scaleX(0);transform-origin:center;opacity:0;transition:transform .2s ease,opacity .2s ease}
.nav-links a:not(.nav-cta):hover:after,.nav-links a[aria-current=page]:after{transform:scaleX(1);opacity:1}
.nav-cta,.hero-cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:#fff;color:#111!important;border-radius:10px;padding:12px 17px;font-weight:700;transition:transform .22s ease,box-shadow .22s ease,background .22s ease}
.nav-cta:hover,.hero-cta:hover{transform:translateY(-2px);box-shadow:0 10px 27px #ffffff2b}
.nav-cta:active,.hero-cta:active{transform:translateY(1px) scale(.985)}
.lang-btn{border:1px solid var(--line);background:#ffffff05;color:#d8d0e3;border-radius:8px;padding:8px 10px;min-width:78px;font-size:11px;letter-spacing:.06em;cursor:pointer;transition:background .2s ease,border-color .2s ease,transform .2s ease}
.lang-btn:hover{background:#a78bfa16;border-color:#a78bfa70;transform:translateY(-1px)}
.wrap{width:min(1120px,calc(100% - 48px));margin:auto}
.hero{padding:160px 0 112px;position:relative;isolation:isolate;background:linear-gradient(90deg,rgba(14,12,20,.98) 0%,rgba(14,12,20,.78) 38%,rgba(14,12,20,.28) 100%),image-set(url("assets/app-backgrounds.webp") 1x,url("assets/app-backgrounds.png") 1x) center/cover;border-bottom:1px solid var(--line-soft)}
.hero:after{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(600px 420px at 82% 20%,rgba(124,58,237,.16),transparent 70%);pointer-events:none}
.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--purple);font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}
.eyebrow:before{content:"";width:28px;height:1px;background:var(--purple)}
.hero h1{max-width:820px;margin:22px 0 24px;font-size:clamp(45px,6vw,78px);line-height:1.03;letter-spacing:-.065em}
.hero h1 span{color:var(--purple)}
.hero-lead{max-width:680px;margin:0;color:var(--muted);font-size:18px;line-height:1.75}
.hero-meta{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px;color:#bdb3cc;font-size:12px}
.hero-meta span{padding:6px 10px;border:1px solid var(--line-soft);border-radius:999px;background:#ffffff05}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-cta{padding:13px 18px}
.hero-secondary{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:11px;padding:12px 16px;color:#eee8f6;transition:transform .22s ease,background .22s ease,border-color .22s ease}
.hero-secondary:hover{transform:translateY(-2px);background:#ffffff09;border-color:#a78bfa60}
.section{padding:116px 0}
.section-title{margin:0 0 10px;font-size:clamp(28px,4vw,42px);line-height:1.15;letter-spacing:-.05em}
.section-desc{margin:0 0 28px;color:var(--muted)}
.post-tools{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:0 0 18px}
.filter-list{display:flex;gap:8px;flex-wrap:wrap;margin:0;padding:0;list-style:none}
.filter-chip{border:1px solid var(--line-soft);border-radius:999px;padding:8px 12px;background:#ffffff04;color:#bdb3cc;font:inherit;font-size:12px;cursor:pointer;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease}
.filter-chip:hover{transform:translateY(-1px);color:#fff;border-color:#a78bfa55;background:#a78bfa0c}
.filter-chip[aria-pressed=true]{color:#1a1128;border-color:var(--purple);background:var(--purple);font-weight:750}
.filter-status{margin:0;color:#8e849b;font-size:12px}
.post-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.post-card{position:relative;display:flex;min-height:235px;flex-direction:column;padding:25px;border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--panel);overflow:hidden;transition:transform .3s cubic-bezier(.2,.8,.2,1),border-color .3s ease,background-color .3s ease,box-shadow .3s ease}
.post-card[hidden]{display:none}
.post-card:before{content:"";position:absolute;width:180px;height:180px;right:-70px;top:-80px;border-radius:50%;background:radial-gradient(circle,rgba(167,139,250,.24),transparent 68%);opacity:.7;transition:transform .35s ease}
.post-card:hover{transform:translateY(-5px);border-color:#a78bfa65;background:var(--panel2);box-shadow:0 18px 38px #0005}
.post-card:hover:before{transform:scale(1.3)}
.post-index{color:var(--purple);font-size:12px;font-weight:750;letter-spacing:.14em}
.post-card h2{position:relative;margin:18px 0 9px;font-size:23px;line-height:1.25;letter-spacing:-.04em}
.post-card p{position:relative;margin:0;color:var(--muted);font-size:14px;line-height:1.7}
.post-link{position:relative;margin-top:auto;padding-top:22px;color:#d8c8ff;font-size:13px;font-weight:700}
.article-shell{padding:72px 0 116px}
.article{max-width:1000px;margin:auto;padding:clamp(25px,5vw,58px);border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:0 28px 75px #0005}
.article section{scroll-margin-top:96px}
.article section+section{margin-top:46px;padding-top:42px;border-top:1px solid var(--line-soft)}
.article h2{margin:0 0 13px;font-size:clamp(24px,3.5vw,34px);line-height:1.2;letter-spacing:-.045em}
.article h3{margin:26px 0 8px;font-size:19px}
.article p{margin:10px 0;color:#e9e4f0;line-height:1.85}
.article ul,.article ol{margin:12px 0;padding-left:24px;color:#e9e4f0}
.article li{margin:8px 0;line-height:1.75}
.article strong{color:#fff}
.article figure{margin:24px 0 0;border:1px solid var(--line-soft);border-radius:18px;overflow:hidden;background:#11101a}
.article figure img{width:100%;height:auto;display:block}
.article figcaption{padding:11px 15px;color:#9f95ae;font-size:12px}
.note{margin:20px 0;padding:15px 17px;border:1px solid rgba(167,139,250,.28);border-left:3px solid var(--purple);border-radius:0 14px 14px 0;background:rgba(167,139,250,.08);color:#e9e1f5}
.checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:18px 0}
.checklist div{padding:13px 14px;border:1px solid var(--line-soft);border-radius:13px;background:#ffffff04;color:#ded6e9}
.table-wrap{margin:20px 0;overflow-x:auto;border:1px solid var(--line-soft);border-radius:14px;-webkit-overflow-scrolling:touch}
.article table{width:100%;min-width:520px;border-collapse:collapse;font-size:14px}
.article th,.article td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line-soft);line-height:1.7}
.article th{background:#ffffff06;color:#fff;font-weight:650;white-space:nowrap}
.article td{color:#ded6e9}
.article tbody tr:last-child td{border-bottom:0}
.faq-item{margin:16px 0;padding:16px 18px;border:1px solid var(--line-soft);border-radius:14px;background:#ffffff04}
.faq-item h3{margin:0 0 6px;font-size:16px;color:#fff}
.faq-item p{margin:0;color:#ded6e9}
.next{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:45px}
.next a{padding:15px;border:1px solid var(--line-soft);border-radius:14px;color:#ddd2ef;background:#ffffff04;transition:transform .22s ease,border-color .22s ease,background .22s ease}
.next a:hover{transform:translateY(-3px);border-color:#a78bfa5c;background:#a78bfa0d}
.next small{display:block;margin-bottom:5px;color:var(--purple);font-size:11px}
.footer{padding:27px 0;color:#716a7d;font-size:12px;border-top:1px solid var(--line-soft)}
.footer-inner{width:min(1120px,calc(100% - 48px));margin:auto;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
.footer-brand-block{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;max-width:720px}
.legal-links{display:flex;gap:16px;flex-wrap:wrap}
.footer a{color:#bdb1cb;margin-left:16px}
.footer a:hover{color:#fff}
.menu{display:none;border:0;background:none;color:#fff;font-size:24px;line-height:1;cursor:pointer;transition:color .2s ease,transform .2s ease}
.menu:hover{color:var(--purple)}
[data-lang-panel]{display:none}[data-lang-panel].is-active{display:block}
[data-zh][data-en]{transition:opacity .18s ease}
@media(max-width:720px){.nav-inner{width:calc(100% - 34px);min-height:64px}.nav-links{display:none;position:absolute;top:64px;left:17px;right:17px;flex-direction:column;align-items:stretch;gap:0;padding:14px;background:#191521;border:1px solid var(--line);border-radius:12px;box-shadow:0 20px 52px #000b}.nav-links.is-open{display:flex;animation:mobileNavIn .22s cubic-bezier(.2,.8,.2,1) both}.nav-links a{padding:11px 4px}.nav-links a:after{bottom:3px}.nav-cta{text-align:center;padding:10px 11px;margin-top:7px}.menu{display:block}.wrap{width:calc(100% - 34px)}.hero{padding:118px 0 82px}.hero h1{font-size:clamp(38px,12vw,58px)}.hero-lead{font-size:16px}.post-grid,.checklist,.next{grid-template-columns:1fr}.post-tools{align-items:flex-start;flex-direction:column}.article-shell{padding:54px 0 82px}.article{padding:24px 19px;border-radius:14px}.article section+section{margin-top:34px;padding-top:30px}.footer-inner{width:calc(100% - 34px);display:block}.footer a{display:inline-block;margin:8px 14px 0 0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.site-nav,.nav-cta,.hero-cta,.lang-btn,.hero-secondary,.post-card,.post-card:before,.filter-chip,.next a,[data-zh][data-en]{transition:none}.nav-links.is-open{animation:none}.post-card:hover,.nav-cta:hover,.hero-cta:hover,.hero-secondary:hover,.filter-chip:hover,.next a:hover{transform:none}}
/* Keep the article introduction legible; native artwork is shown in full below. */
.hero { background: #100e17; }