/* Polder Mac — public site */
:root{
  --sky:#edf0f2; --paper:#ffffff; --ink:#16202a; --ink-2:#5b6672; --ink-3:#8a949e; --rule:#d5dbe0;
  --ghost:#c3cbd3; --delft:#1e4bb8; --delft-ink:#fff; --delft-soft:#e3e9f7; --field:#4f7a3a; --signal:#a24f12;
  --serif:"Source Serif 4","Noto Serif SC",Georgia,serif;
  --sans:"Source Sans 3","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --sky:#11161b; --paper:#181f26; --ink:#e8ecef; --ink-2:#a3adb6; --ink-3:#7c8792; --rule:#28313a;
  --ghost:#3a4550; --delft:#86a3ff; --delft-ink:#0c1530; --delft-soft:#1b2540; --field:#8cbf6a; --signal:#f0a35e;}}
:root[data-theme="dark"]{
  --sky:#11161b; --paper:#181f26; --ink:#e8ecef; --ink-2:#a3adb6; --ink-3:#7c8792; --rule:#28313a;
  --ghost:#3a4550; --delft:#86a3ff; --delft-ink:#0c1530; --delft-soft:#1b2540; --field:#8cbf6a; --signal:#f0a35e;}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--sky);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
html[data-lang="zh"] .en{display:none!important}
html[data-lang="en"] .zh{display:none!important}
a{color:inherit}
:focus-visible{outline:2px solid var(--delft);outline-offset:3px;border-radius:4px}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
@media(min-width:760px){.wrap{padding:0 40px}}
.narrow{max-width:760px}

/* header */
.top{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--sky) 88%,transparent);backdrop-filter:saturate(1.3) blur(14px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--serif);font-weight:500;font-size:22px;letter-spacing:-.01em;white-space:nowrap}
.brand-tag{display:none;font-size:13px;color:var(--ink-3);white-space:nowrap}
@media(min-width:1100px){.brand-tag{display:block}}
.nav{display:none;margin-left:auto;gap:26px;font-size:15px;color:var(--ink-2)}
.nav a{text-decoration:none}.nav a:hover{color:var(--ink)}
@media(min-width:920px){.nav{display:flex}}
.top-right{display:flex;align-items:center;gap:10px;margin-left:auto}
@media(min-width:920px){.top-right{margin-left:12px}}
.lang{display:flex;border:1px solid var(--rule);border-radius:8px;padding:2px;background:var(--paper)}
.lang button{border:0;background:none;font:inherit;font-size:13px;padding:3px 9px;border-radius:6px;color:var(--ink-2);cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--sky)}
.signin{font-size:15px;text-decoration:none;color:var(--ink-2);display:none}
@media(min-width:560px){.signin{display:inline}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-size:15px;font-weight:600;text-decoration:none;padding:11px 20px;border-radius:8px;border:1px solid var(--ink);background:var(--ink);color:var(--sky);cursor:pointer;white-space:nowrap}
.btn:hover{opacity:.88}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.btn.ghost:hover{border-color:var(--ink);opacity:1}
.btn.blue{background:var(--delft);border-color:var(--delft);color:var(--delft-ink)}
.btn.sm{padding:7px 14px;font-size:14px}

/* type */
.display{font-family:var(--serif);font-weight:300;letter-spacing:-.02em;line-height:1.08}
html[data-lang="zh"] .display{font-weight:400;letter-spacing:.01em;line-height:1.18}
h1.display{font-size:clamp(44px,8vw,104px)}
html[data-lang="zh"] h1.display{font-size:clamp(38px,6.4vw,84px)}
h2.display{font-size:clamp(36px,5.6vw,76px)}
.sub{color:var(--ink-2);font-size:clamp(17px,1.6vw,20px);line-height:1.7}
.center{text-align:center}.center .sub{margin-left:auto;margin-right:auto}
.kicker{font-size:14px;color:var(--ink-3)}
.reveal{color:var(--ghost);transition:color 1.1s ease}
.reveal.in{color:var(--ink)}

/* hero */
.hero{padding:80px 0 0}
@media(min-width:760px){.hero{padding:120px 0 0}}
.hero h1{margin:14px auto 22px;max-width:14ch}
html[data-lang="zh"] .hero h1{max-width:12em}
.hero .sub{max-width:34em}
.hero .actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero .fineprint{margin-top:16px;font-size:14px;color:var(--ink-3)}

/* remote screen */
.screen-wrap{margin:72px auto 0;max-width:1080px;text-align:left}
.screen{border-radius:14px;overflow:hidden;background:#1d2833;box-shadow:0 50px 90px -40px rgba(22,32,42,.45),0 0 0 1px rgba(22,32,42,.10)}
.chrome{display:flex;align-items:center;gap:12px;padding:9px 14px;background:#e6eaee;color:#3f4a55;font-size:12.5px;border-bottom:1px solid #d3d9df}
.dots{display:flex;gap:7px}.dots i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.dots i:nth-child(2){background:#febc2e}.dots i:nth-child(3){background:#28c840}
.chrome .title{flex:1;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.live{display:inline-flex;align-items:center;gap:6px;color:var(--field);white-space:nowrap}
.live::before{content:"";width:7px;height:7px;border-radius:50%;background:#5aa33b}
.desk{position:relative;aspect-ratio:16/9.4;min-height:300px}
.desk svg.wall{position:absolute;inset:0;width:100%;height:100%}
.menubar{position:absolute;left:0;right:0;top:0;height:24px;background:rgba(255,255,255,.6);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:space-between;padding:0 14px;font-size:12px;color:#16202a;font-weight:600}
.menubar span{white-space:nowrap}.menubar .menus{display:flex;gap:16px}.menubar .menus i{font-style:normal;font-weight:500}
.term{position:absolute;left:6%;top:14%;width:min(560px,76%);border-radius:10px;overflow:hidden;background:rgba(15,21,28,.94);box-shadow:0 24px 48px -16px rgba(0,0,0,.5)}
.term-bar{height:24px;display:flex;align-items:center;gap:6px;padding:0 10px;background:rgba(255,255,255,.06)}
.term-bar i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.18)}
.term pre{font-family:var(--mono);font-size:12px;line-height:1.6;color:#d6e2ec;padding:12px 14px 16px;min-height:190px;white-space:pre-wrap;word-break:break-word}
@media(min-width:760px){.term pre{font-size:13px;min-height:220px}}
.term .p{color:#86a3ff}.term .ok{color:#9fd27a;font-weight:700}.term .dim{color:#7c8b98}
.caret{display:inline-block;width:.6em;height:1.1em;vertical-align:-.15em;background:#d6e2ec;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
@media(max-width:560px){.term{width:88%}}

/* sections */
section{padding:120px 0}
@media(max-width:759px){section{padding:88px 0}}
.sec-head{max-width:860px}
.sec-head.center{margin:0 auto}
.sec-head .sub{margin-top:22px;max-width:30em}
.split{display:grid;gap:24px;align-items:end}
@media(min-width:900px){.split{grid-template-columns:1.2fr 1fr;gap:64px}}

/* device */
.device{display:block;margin:64px auto 0;width:min(620px,100%)}
.specs{display:grid;grid-template-columns:1fr;margin:48px auto 0;max-width:900px}
@media(min-width:640px){.specs{grid-template-columns:repeat(3,1fr);column-gap:36px}}
.spec{border-top:1px solid var(--rule);padding:16px 0 22px;text-align:center}
.spec strong{display:block;font-weight:600;font-size:17px}
.spec span{font-size:14px;color:var(--ink-2)}

/* pricing */
.tabs{display:flex;border-bottom:1px solid var(--rule);margin-top:56px}
.tabs button{flex:1;background:none;border:0;font:inherit;font-size:17px;color:var(--ink-3);padding:14px 0;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tabs button[aria-selected="true"]{color:var(--ink);border-color:var(--ink);font-weight:600}
.plan{display:grid;gap:40px;padding-top:40px}
@media(min-width:900px){.plan{grid-template-columns:1fr 1.1fr;gap:80px}}
.plan-name{font-family:var(--serif);font-size:clamp(30px,3.6vw,44px);font-weight:400;line-height:1.15}
.plan-line{color:var(--ink-2);margin-top:10px}
.price{display:flex;align-items:baseline;gap:10px;margin-top:28px;flex-wrap:wrap}
.price .amt{font-family:var(--serif);font-weight:300;font-size:clamp(64px,9vw,104px);line-height:1;letter-spacing:-.03em}
.price .per{color:var(--ink-2);font-size:18px}
.save{display:inline-block;margin-top:12px;font-size:14px;color:var(--field);font-weight:600;min-height:1.6em}
.plan .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.rows{border-top:1px solid var(--ink)}
.rows div{display:flex;justify-content:space-between;gap:16px;padding:15px 0;border-bottom:1px solid var(--rule);font-size:16px}
.rows dt{color:var(--ink-2)}.rows dd{text-align:right;font-weight:500}
.vat{margin-top:18px;font-size:14px;color:var(--ink-3)}

/* uses */
.uses{display:grid;margin-top:56px;border-top:1px solid var(--rule)}
@media(min-width:760px){.uses{grid-template-columns:1fr 1fr;column-gap:64px}}
.use{padding:26px 0;border-bottom:1px solid var(--rule)}
.use h3{font-family:var(--serif);font-weight:400;font-size:24px;line-height:1.3}
.use p{color:var(--ink-2);margin-top:6px;font-size:16px}

/* steps */
.steps{list-style:none;counter-reset:s;display:grid;margin-top:64px;border-top:1px solid var(--rule)}
@media(min-width:900px){.steps{grid-template-columns:repeat(4,1fr);column-gap:36px}}
.steps li{counter-increment:s;padding:22px 0 26px;border-bottom:1px solid var(--rule)}
@media(min-width:900px){.steps li{border-bottom:0}}
.steps li::before{content:counter(s,decimal-leading-zero);display:block;font-size:13px;color:var(--ink-3);margin-bottom:12px}
.steps h3{font-size:18px;font-weight:600}
.steps p{color:var(--ink-2);font-size:15px;margin-top:6px}
.after-steps{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:48px}

/* rules strip */
.rulebox{display:grid;gap:32px;margin-top:56px}
@media(min-width:900px){.rulebox{grid-template-columns:1fr 1fr;gap:64px}}
.rulebox ul{list-style:none;border-top:1px solid var(--signal)}
.rulebox li{padding:13px 0;border-bottom:1px solid var(--rule);font-size:16px}
.rulebox li strong{color:var(--signal);font-weight:600}
.rulebox .side p{color:var(--ink-2);font-size:16px}
.rulebox .side p+p{margin-top:14px}
.rulebox .side a{color:var(--delft);font-weight:600}

/* faq */
.faq{margin:56px auto 0;max-width:860px;border-top:1px solid var(--ink)}
details{border-bottom:1px solid var(--rule)}
summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:20px;padding:20px 0;font-size:18px;font-weight:500}
summary::-webkit-details-marker{display:none}
summary::after{content:"";flex:none;width:9px;height:9px;margin-top:8px;border-right:1.5px solid var(--ink-2);border-bottom:1.5px solid var(--ink-2);transform:rotate(45deg);transition:transform .2s}
details[open] summary::after{transform:rotate(-135deg)}
details p{color:var(--ink-2);padding:0 0 22px;max-width:44em;font-size:16px}

/* closing */
.closing{padding:120px 0 140px;text-align:center}
.closing .actions{display:flex;justify-content:center;gap:12px;margin-top:36px;flex-wrap:wrap}

/* footer */
footer{border-top:1px solid var(--rule);padding:44px 0 60px;font-size:14px;color:var(--ink-2)}
.foot{display:grid;gap:28px}
@media(min-width:760px){.foot{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.foot h4{color:var(--ink);font-size:14px;font-weight:600;margin-bottom:8px}
.foot a{display:block;text-decoration:none;margin:4px 0;word-break:break-all}.foot a:hover{color:var(--ink)}
.legal-line{margin-top:36px;font-size:12.5px;color:var(--ink-3)}

/* legal / help pages */
.doc{padding:72px 0 120px}
.doc-grid{display:grid;gap:40px}
@media(min-width:960px){.doc-grid{grid-template-columns:220px 1fr;gap:72px}}
.doc-nav{position:sticky;top:96px;align-self:start;display:none}
@media(min-width:960px){.doc-nav{display:block}}
.doc-nav a{display:block;padding:9px 0;border-bottom:1px solid var(--rule);text-decoration:none;font-size:15px;color:var(--ink-2)}
.doc-nav a[aria-current="page"]{color:var(--ink);font-weight:600}
.prose{max-width:720px}
.prose h1{font-family:var(--serif);font-weight:400;font-size:clamp(36px,5vw,56px);line-height:1.15;margin-bottom:12px}
.prose .meta{color:var(--ink-3);font-size:14px;margin-bottom:40px}
.prose h2{font-family:var(--serif);font-weight:500;font-size:26px;margin:48px 0 14px;line-height:1.3}
.prose h3{font-size:18px;font-weight:600;margin:28px 0 8px}
.prose p,.prose li{font-size:17px;color:var(--ink)}
.prose p+p{margin-top:12px}
.prose ul,.prose ol{padding-left:1.3em;margin:10px 0}
.prose li+li{margin-top:6px}
.prose .note{background:var(--paper);border:1px solid var(--rule);border-radius:10px;padding:16px 18px;margin:20px 0;font-size:16px;color:var(--ink-2)}
.prose code{font-family:var(--mono);font-size:.9em;background:var(--paper);border:1px solid var(--rule);padding:1px 5px;border-radius:4px}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{color:var(--ink)}}