/* Shared by the guides and the privacy / terms pages: the home page's dark stage, set for reading (and its day version, data-theme=light).
   Linked as /article.css (the guides are generated by marketing/build-guides.py; the four legal pages are static files). */
@font-face{font-family:"Inter";src:url(/fonts/Inter-var.woff2) format("woff2");font-weight:100 900;font-display:swap}
:root{
  --bg:#05060a; --ink:#f4f6fb; --text:#cdd2df; --dim:#a4abbc; --faint:#7d8496; --hair:rgba(255,255,255,.09); --hair2:rgba(255,255,255,.16); --link:#8fb6ff;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --ui:-apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --grad:linear-gradient(90deg,#5b9dff 0%,#8d7bff 30%,#f25fa4 64%,#ff8d3f 100%);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{background:var(--bg);overflow-x:hidden;-webkit-text-size-adjust:100%;scroll-padding-top:60px}
body{margin:0;background:var(--bg);color:var(--text);font:400 17.5px/1.72 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:clip;position:relative;isolation:isolate}
/* the same cool light as the home page's hero, at rest */
body::before{content:"";position:absolute;left:0;right:0;top:0;height:560px;z-index:-1;pointer-events:none;
  background:radial-gradient(62% 100% at 80% -12%,rgba(40,108,255,.36),transparent 70%),radial-gradient(40% 80% at 6% -22%,rgba(141,123,255,.17),transparent 70%)}
img{max-width:100%;height:auto}
::selection{background:rgba(120,140,255,.4)}
:focus-visible{outline:2px solid #8fb4ff;outline-offset:3px;border-radius:6px}

/* top bar, a quieter sibling of the home page's menu bar */
.bar{position:sticky;top:0;z-index:10;height:40px;background:rgba(10,11,16,.66);-webkit-backdrop-filter:saturate(170%) blur(22px);backdrop-filter:saturate(170%) blur(22px);box-shadow:inset 0 -1px 0 rgba(255,255,255,.07)}
.bar .in{max-width:1100px;margin:0 auto;padding:0 14px;height:100%;display:flex;align-items:center;gap:2px;font:500 13px/1 var(--ui)}
.bar a{height:26px;padding:0 9px;display:flex;align-items:center;gap:8px;border-radius:7px;text-decoration:none;color:rgba(255,255,255,.84);white-space:nowrap}
.bar a:hover{background:rgba(255,255,255,.11);color:#fff}
.bar a.app{font-weight:700;color:#fff;padding:0 8px}
.bar a.app img{width:18px;height:18px;border-radius:4.5px;display:block}
.bar .sp{flex:1}
.bar a.get{margin-left:8px;padding:0 13px;border-radius:999px;background:#fff;color:#0b0c10;font-weight:600;font-size:12.5px}
.bar a.get:hover{background:#e9edf7;color:#0b0c10}

.wrap{max-width:780px;margin:0 auto;padding:64px 22px 90px}
.kicker{display:inline-flex;align-items:center;gap:9px;margin:0 0 18px;font:600 12.5px/1 var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--grad);box-shadow:0 0 12px rgba(141,123,255,.9)}
h1{font:650 clamp(32px,5.4vw,52px)/1.06 var(--sans);letter-spacing:-.036em;color:var(--ink);margin:0 0 18px;text-wrap:balance}
.meta,.date{color:var(--faint);font-size:14px;line-height:1.5;margin:0 0 44px}
h2{font:650 26px/1.2 var(--sans);letter-spacing:-.026em;color:var(--ink);margin:54px 0 14px;text-wrap:balance}
h3{font:600 19px/1.3 var(--sans);letter-spacing:-.015em;color:var(--ink);margin:32px 0 8px}
p{margin:0 0 16px}
ul,ol{margin:0 0 16px;padding-left:24px}
li{margin:7px 0} li::marker{color:var(--faint)}
strong,b{color:var(--ink);font-weight:600}
a{color:var(--link);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:#bcd2ff}
code{font:.86em var(--mono);background:rgba(255,255,255,.08);padding:2px 6px;border-radius:6px;color:#e6e9f2}
pre{background:rgba(255,255,255,.045);box-shadow:inset 0 0 0 1px var(--hair);border-radius:14px;padding:16px 18px;overflow-x:auto;font:14px/1.55 var(--mono);margin:0 0 18px;color:#e6e9f2}
pre code{background:none;padding:0;font-size:1em}
.tablewrap{overflow-x:auto;margin:0 0 20px;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:15.5px;line-height:1.5}
table.wide{min-width:640px}
th,td{text-align:left;padding:11px 14px 11px 0;border-bottom:1px solid var(--hair);vertical-align:top}
th{color:var(--faint);font-weight:600;font-size:12px;letter-spacing:.08em;text-transform:uppercase}
td:first-child{color:var(--ink)}
.note{position:relative;overflow:hidden;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.025));box-shadow:inset 0 0 0 1px var(--hair);border-radius:16px;padding:18px 20px 18px 24px;margin:0 0 20px;font-size:16px}
.note::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(#5b9dff,#8d7bff,#f25fa4)}
.note b{display:block;margin-bottom:4px}
.muted{color:var(--dim)}
figure{margin:30px 0}
figure img{display:block;border-radius:14px;box-shadow:0 0 0 1px rgba(255,255,255,.14),0 30px 60px -30px #000}
figcaption{color:var(--faint);font-size:13.5px;line-height:1.5;margin-top:10px}

/* the product card at the end of a guide */
.cta{margin:48px 0 0;padding:24px;border-radius:22px;display:flex;gap:18px;align-items:flex-start;background:linear-gradient(#0e1017,#0b0c12) padding-box,var(--grad) border-box;border:1px solid transparent;box-shadow:0 30px 90px -50px rgba(141,123,255,.9)}
.cta img{width:52px;height:52px;border-radius:13px;flex:none}
.cta p{margin:0 0 14px;font-size:16px;line-height:1.6}
.btn{display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:999px;background:#fff;color:#0a0b0f;font:600 14.5px/1 var(--sans);text-decoration:none}
.btn:hover{background:#e9edf7;color:#0a0b0f}

.faq{border-top:1px solid var(--hair)}
.faq details{border-bottom:1px solid var(--hair)}
.faq summary{cursor:pointer;list-style:none;position:relative;padding:17px 40px 17px 0;font:600 17.5px/1.35 var(--sans);letter-spacing:-.015em;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:4px;top:22px;width:9px;height:9px;border-right:2px solid var(--faint);border-bottom:2px solid var(--faint);transform:rotate(45deg);transition:transform .25s}
.faq details[open] summary::after{transform:rotate(225deg) translate(-3px,-3px)}
.faq p{margin:0 0 18px;color:var(--dim)}

.more{margin-top:60px}
.more h2{margin:0 0 14px;font-size:20px}
.more a,.card{display:block;text-decoration:none;color:var(--ink);border-radius:16px;background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));box-shadow:inset 0 0 0 1px var(--hair);transition:background .2s,box-shadow .2s}
.more a{padding:14px 18px;margin:0 0 8px;font-weight:500;font-size:16.5px;line-height:1.4}
.more a:hover,.card:hover{background:rgba(255,255,255,.08);box-shadow:inset 0 0 0 1px var(--hair2);color:var(--ink)}
.card{padding:22px 24px;margin:0 0 14px;border-radius:20px}
.card h2{margin:0 0 8px;font-size:21px;line-height:1.25}
.card p{margin:0;color:var(--dim);font-size:15.5px;line-height:1.6}

footer{margin-top:76px;padding-top:22px;border-top:1px solid var(--hair);font-size:13.5px;line-height:1.5;color:var(--faint);display:flex;flex-wrap:wrap;gap:8px 20px}
footer a{color:var(--faint);text-decoration:none}
footer a:hover{color:var(--ink)}

/* the day / night switch in the bar (the same one as the home page) */
.bar .tt{display:grid;place-items:center;width:30px;height:26px;margin-left:2px;padding:0;border:0;border-radius:7px;background:none;color:rgba(255,255,255,.84);cursor:pointer;flex:none}
.bar .tt svg{width:16px;height:16px;display:block} .bar .tt .moon{display:none}
.bar .tt:hover{background:rgba(255,255,255,.11);color:#fff}

/* Day: the same pages on a light ground. The dark rules above stay the default. */
:root[data-theme=light]{--bg:#f5f5f7;--ink:#0b0c10;--text:#2b2f3a;--dim:#525868;--faint:#7c8293;--hair:rgba(20,24,40,.1);--hair2:rgba(20,24,40,.18);--link:#2f62d8;color-scheme:light}
[data-theme=light] body::before{background:radial-gradient(62% 100% at 80% -12%,rgba(70,130,255,.2),transparent 70%),radial-gradient(40% 80% at 6% -22%,rgba(141,123,255,.1),transparent 70%)}
[data-theme=light] ::selection{background:rgba(90,110,255,.22)}
[data-theme=light] :focus-visible{outline-color:#2f6fe4}
[data-theme=light] .bar{background:rgba(248,248,250,.74);box-shadow:inset 0 -1px 0 rgba(20,24,40,.08)}
[data-theme=light] .bar a,[data-theme=light] .bar .tt{color:rgba(0,0,0,.76)}
[data-theme=light] .bar a:hover,[data-theme=light] .bar .tt:hover{background:rgba(20,24,40,.07);color:#000}
[data-theme=light] .bar a.app{color:#0b0c10}
[data-theme=light] .bar a.get{background:#0b0c10;color:#fff} [data-theme=light] .bar a.get:hover{background:#2a2d36;color:#fff}
[data-theme=light] .bar .tt .sun{display:none} [data-theme=light] .bar .tt .moon{display:block}
[data-theme=light] a:hover{color:#1d4fc4}
[data-theme=light] code{background:rgba(20,24,40,.06);color:#1d2230}
[data-theme=light] pre{background:#fff;color:#1d2230;box-shadow:inset 0 0 0 1px var(--hair)}
[data-theme=light] .note{background:#fff;box-shadow:inset 0 0 0 1px var(--hair),0 10px 30px -22px rgba(20,24,40,.25)}
[data-theme=light] figure img{box-shadow:0 0 0 1px rgba(20,24,40,.1),0 24px 50px -30px rgba(20,30,60,.4)}
[data-theme=light] .cta{background:linear-gradient(#fff,#fff) padding-box,var(--grad) border-box;box-shadow:0 30px 80px -50px rgba(141,123,255,.6)}
[data-theme=light] .btn{background:#0b0c10;color:#fff} [data-theme=light] .btn:hover{background:#2a2d36;color:#fff}
[data-theme=light] .more a,[data-theme=light] .card{background:#fff;box-shadow:0 0 0 1px rgba(20,24,40,.07),0 1px 2px rgba(20,24,40,.04)}
[data-theme=light] .more a:hover,[data-theme=light] .card:hover{background:#fff;box-shadow:0 0 0 1px rgba(20,24,40,.14),0 14px 34px -22px rgba(20,24,40,.3)}

/* 简体中文 */
:lang(zh) body,body:lang(zh){line-height:1.85}
:lang(zh) h1{letter-spacing:-.015em;line-height:1.22}
:lang(zh) h2{letter-spacing:-.01em;line-height:1.3}
:lang(zh) h3,:lang(zh) .faq summary{letter-spacing:0}
:lang(zh) .kicker{text-transform:none;letter-spacing:.14em}
:lang(zh) th{text-transform:none;letter-spacing:.04em;font-size:13px}

@media (max-width:560px){
  .wrap{padding:44px 20px 72px}
  body{font-size:17px}
  .cta{flex-direction:column;gap:14px;padding:20px}
  .bar .in{padding:0 8px}
  .bar a{padding:0 7px}
}
@media (prefers-reduced-motion:reduce){ .faq summary::after,.more a,.card{transition:none} }