:root{--bg:#0a0b0d;--bg-soft:#101216;--bg-elev:#15181d;--bg-code:#0a0b0d;--bg-card-end:rgba(16,18,22,.4);--bg-grid-card:rgba(16,18,22,.5);--bg-dl-end:rgba(16,18,22,.3);--bg-footer-strip:rgba(0,0,0,.15);--pill-bg:rgba(255,255,255,.02);--line:#1f242c;--line-strong:#2a313b;--fg:#e6e8eb;--fg-mute:#9aa3ad;--fg-dim:#6b7480;--acc:#0A84FF;--acc-2:#5AC8FA;--green:#7dd17d;--red:#ef6b6b;--blue:#7aa7ff;--mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"JetBrains Mono",monospace;--sans:"Inter",-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Helvetica Neue",Arial,sans-serif;--nav-bg:rgba(10,11,13,.82);--nav-panel-bg:rgba(10,11,13,.97)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
html,body{margin:0;padding:0}
body{background:radial-gradient(1200px 600px at 80% -10%,rgba(10,132,255,.12),transparent 60%),radial-gradient(900px 500px at -10% 10%,rgba(10,132,255,.07),transparent 60%),var(--bg);color:var(--fg);font-family:var(--sans);line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
code,pre,kbd{font-family:var(--mono)}
::selection{background:rgba(10,132,255,.35);color:#fff}

a,button,[role="button"],summary,.btn{cursor:pointer}
*:focus-visible{outline:2px solid var(--acc);outline-offset:3px;border-radius:4px}

nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(140%) blur(14px);background:var(--nav-bg);border-bottom:1px solid var(--line);transition:border-color .3s,background .3s}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:.2px}
.brand img{width:26px;height:26px;border-radius:7px;display:block}
.brand .ver{color:var(--fg-dim);font-size:12px;font-family:var(--mono)}
.nav-links{display:flex;gap:26px;color:var(--fg-mute);font-size:14px}
.nav-links a{transition:color .15s}
.nav-links a:hover{color:var(--fg)}
.nav-right{display:flex;align-items:center;gap:8px}
.nav-cta{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:1px solid var(--line-strong);border-radius:999px;font-size:13px;color:var(--fg);background:var(--bg-elev);transition:border-color .2s,color .2s}
.nav-cta:hover{border-color:var(--acc);color:var(--acc)}
.ham{display:none;align-items:center;justify-content:center;width:36px;height:36px;padding:6px;border:1px solid var(--line-strong);border-radius:8px;background:var(--bg-elev);color:var(--fg);transition:border-color .2s,color .2s}
.ham:hover{border-color:var(--acc);color:var(--acc)}
.theme-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;padding:6px;border:1px solid var(--line-strong);border-radius:8px;background:var(--bg-elev);color:var(--fg);transition:border-color .2s,color .2s}
.theme-toggle:hover{border-color:var(--acc);color:var(--acc)}
.lang-toggle{display:flex;align-items:center;justify-content:center;height:36px;padding:0 10px;border:1px solid var(--line-strong);border-radius:8px;background:var(--bg-elev);color:var(--fg);font-size:12px;font-family:var(--mono);font-weight:600;letter-spacing:.02em;transition:border-color .2s,color .2s}
.lang-toggle:hover{border-color:var(--acc);color:var(--acc)}
.doc-lang-notice{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:11px 0;font-size:13px;color:var(--fg-mute);text-align:center;display:none}
.doc-lang-notice.show{display:block}
.doc-lang-notice a{color:var(--acc)}
@media (max-width:780px){.nav-links{display:none}.ham{display:flex}}

.nav-panel{display:none;position:fixed;top:60px;left:0;right:0;z-index:49;background:var(--nav-panel-bg);backdrop-filter:blur(20px);border-bottom:1px solid var(--line);padding:16px 24px 24px;flex-direction:column;gap:4px}
.nav-panel.open{display:flex}
.nav-panel a{padding:12px 8px;font-size:16px;color:var(--fg-mute);border-bottom:1px solid var(--line);transition:color .15s}
.nav-panel a:last-child{border-bottom:none}
.nav-panel a:hover{color:var(--fg)}

.hero{padding:88px 0 60px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr;gap:48px}}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border:1px solid var(--line-strong);border-radius:999px;font-size:12px;color:var(--fg-mute);background:var(--pill-bg)}
.pill .dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(125,209,125,.15);flex-shrink:0}
h1{font-size:clamp(38px,5.4vw,64px);line-height:1.04;letter-spacing:-.02em;margin:18px 0;font-weight:700}
h1 .grad{background:linear-gradient(180deg,#fff 0%,#5AC8FA 60%,#0A84FF 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--fg-mute);font-size:18px;max-width:560px;line-height:1.65}
.sub b{color:var(--fg);font-weight:600}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:12px;font-size:14px;font-weight:600;border:1px solid transparent;transition:transform .15s,background .2s,border-color .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(180deg,#3AADFF,#0060CC);color:#fff;border-color:#5AC8FA;box-shadow:0 10px 30px -10px rgba(10,132,255,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 36px -10px rgba(10,132,255,.7)}
.btn-ghost{background:var(--bg-elev);border-color:var(--line-strong);color:var(--fg)}
.btn-ghost:hover{border-color:var(--fg-mute)}
.meta{display:flex;gap:12px 18px;flex-wrap:wrap;margin-top:22px;color:var(--fg-dim);font-size:13px}
.meta span::before{content:"· ";opacity:.5}
.meta span:first-child::before{content:""}
@media (max-width:480px){.meta{gap:8px 14px;font-size:12px}}

.stage{position:relative;display:flex;justify-content:center;color:#e6e8eb;--fg:#e6e8eb;--fg-mute:#9aa3ad;--fg-dim:#6b7480;--acc:#0A84FF;--acc-2:#5AC8FA;--green:#7dd17d;--red:#ef6b6b;--blue:#7aa7ff;--bg:#0a0b0d;--bg-soft:#101216;--bg-elev:#15181d;--line:#1f242c;--line-strong:#2a313b}
.stage::before{content:"";position:absolute;inset:-40px;background:radial-gradient(closest-side,rgba(10,132,255,.18),transparent 70%);filter:blur(20px);z-index:0}
.stage .phone{position:relative;width:300px;height:610px;border-radius:46px;background:linear-gradient(180deg,#1a1d23,#0d0f12);padding:14px;box-shadow:0 40px 80px -30px rgba(0,0,0,.7),0 0 0 1px #2a313b inset,0 0 0 8px rgba(255,255,255,.02);z-index:1}
.stage .phone::after{content:"";position:absolute;top:18px;left:50%;transform:translateX(-50%);width:110px;height:28px;background:#000;border-radius:18px;z-index:3}
.stage .phone .screen{position:relative;width:100%;height:100%;border-radius:34px;background:#0e1014;overflow:hidden;border:1px solid #1f242c}
.stage .phone .screen-img{display:block;width:100%;height:100%;object-fit:cover}

section{padding:100px 0;border-top:1px solid var(--line)}
.eyebrow{color:var(--acc);font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase}
.h2{font-size:clamp(28px,3.4vw,40px);line-height:1.15;letter-spacing:-.015em;margin:10px 0 14px;font-weight:700}
.lede{color:var(--fg-mute);font-size:17px;max-width:640px;line-height:1.7}

.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:48px}
@media (max-width:880px){.features{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.features{grid-template-columns:1fr}}
.card{padding:26px 24px;border:1px solid var(--line);background:linear-gradient(180deg,var(--bg-soft),var(--bg-card-end));border-radius:16px;transition:border-color .25s,transform .25s,box-shadow .25s}
.card:hover{border-color:rgba(10,132,255,.3);transform:translateY(-3px);box-shadow:0 12px 36px -12px rgba(10,132,255,.2)}
.card .ico{width:36px;height:36px;border-radius:10px;background:rgba(10,132,255,.1);border:1px solid rgba(10,132,255,.25);display:grid;place-items:center;margin-bottom:18px;color:var(--acc);transition:background .25s,border-color .25s}
.card:hover .ico{background:rgba(10,132,255,.15);border-color:rgba(10,132,255,.4)}
.card h3{font-size:16px;margin:0 0 8px;font-weight:600}
.card p{margin:0;color:var(--fg-mute);font-size:14px;line-height:1.65}
.card code{background:var(--bg);border:1px solid var(--line);padding:1px 6px;border-radius:5px;font-size:12px;color:var(--acc-2)}
.card kbd{background:var(--bg);border:1px solid var(--line-strong);padding:1px 6px;border-radius:5px;font-size:11px;color:var(--fg)}
.lit{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:4px;vertical-align:middle}
.lit.g{background:var(--green);box-shadow:0 0 6px var(--green)}
.lit.y{background:var(--acc);box-shadow:0 0 6px var(--acc)}
.lit.r{background:var(--red);box-shadow:0 0 6px var(--red)}

.diagram{margin:60px 0 50px;display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:center}
@media (max-width:760px){.diagram{grid-template-columns:1fr;gap:16px}}
.node{padding:24px;border:1px solid var(--line);border-radius:16px;background:var(--bg-soft);text-align:center;transition:border-color .25s,transform .25s}
.node:hover{transform:translateY(-2px)}
.node.mac{border-color:rgba(10,132,255,.25);background:linear-gradient(180deg,rgba(10,132,255,.05),var(--bg-soft))}
.node.phone{border-color:rgba(90,200,250,.25);background:linear-gradient(180deg,rgba(90,200,250,.05),var(--bg-soft))}
.node .t{font-size:12px;color:var(--fg-mute);font-family:var(--mono);text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px}
.node .b{font-size:20px;font-weight:600;margin-bottom:8px}
.node .d{font-size:12px;color:var(--fg-dim);font-family:var(--mono);line-height:1.7}
.link{display:flex;flex-direction:column;align-items:center;gap:10px;min-width:160px}
.link .line{width:100%;height:2px;background:linear-gradient(90deg,rgba(10,132,255,.6),rgba(90,200,250,.6));border-radius:2px;position:relative}
.link .line::before,.link .line::after{content:"";position:absolute;top:50%;width:6px;height:6px;border-radius:50%;transform:translateY(-50%)}
.link .line::before{left:0;background:var(--acc)}
.link .line::after{right:0;background:var(--acc-2)}
.link .lbl{font-size:12px;color:var(--fg-mute);font-family:var(--mono)}
.link .proto{font-size:11px;color:var(--fg-dim);font-family:var(--mono)}
@media (max-width:760px){.link{min-width:0}.link .line{width:2px;height:60px;background:linear-gradient(180deg,rgba(10,132,255,.6),rgba(90,200,250,.6))}.link .line::before{left:50%;top:0;transform:translateX(-50%)}.link .line::after{right:auto;left:50%;top:auto;bottom:0;transform:translateX(-50%)}}

.how-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:30px}
@media (max-width:680px){.how-grid{grid-template-columns:1fr}}
.how-grid>div{padding:22px;border:1px solid var(--line);border-radius:14px;background:var(--bg-grid-card);transition:border-color .25s}
.how-grid>div:hover{border-color:var(--line-strong)}
.how-grid span{display:inline-block;font-family:var(--mono);font-size:11px;color:var(--acc);background:rgba(10,132,255,.1);padding:3px 8px;border-radius:6px;margin-bottom:10px}
.how-grid b{display:block;font-size:15px;margin-bottom:6px}
.how-grid p{margin:0;color:var(--fg-mute);font-size:13.5px;line-height:1.65}
.how-grid code{background:var(--bg-code);border:1px solid var(--line);padding:1px 5px;border-radius:4px;font-size:12px;color:var(--acc-2)}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:48px}
@media (max-width:880px){.steps{grid-template-columns:1fr}}
.step{position:relative;padding:24px;border:1px solid var(--line);border-radius:16px;background:var(--bg-soft);overflow:hidden;transition:border-color .25s}
.step:hover{border-color:var(--line-strong)}
.step .num{width:30px;height:30px;border-radius:8px;background:var(--bg);border:1px solid var(--line-strong);color:var(--acc);display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:14px;margin-bottom:14px}
.step h4{margin:0 0 14px;font-size:15px;font-weight:600}
.step pre{position:relative;margin:0;background:var(--bg-code);border:1px solid var(--line);border-radius:10px;padding:14px;overflow-x:auto;font-size:12px;line-height:1.6;color:var(--fg)}
.copy-btn{position:absolute;top:8px;right:8px;padding:3px 8px;font-size:11px;font-family:var(--mono);background:var(--bg-elev);border:1px solid var(--line-strong);border-radius:6px;color:var(--fg-mute);cursor:pointer;transition:border-color .15s,color .15s;line-height:1.5;z-index:1}
.copy-btn:hover{border-color:var(--acc);color:var(--acc)}
.copy-btn.copied{border-color:var(--green);color:var(--green)}
.step pre .c{color:var(--fg-dim)}
.step pre .v{color:var(--blue)}
.step pre .s{color:var(--acc-2)}
.step pre .k{color:#c79bf0}

.dl{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:48px}
@media (max-width:680px){.dl{grid-template-columns:1fr}}
.dl-card{padding:28px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(180deg,var(--bg-soft),var(--bg-dl-end));display:flex;flex-direction:column;gap:14px;transition:border-color .25s,transform .25s}
.dl-card:hover{border-color:rgba(10,132,255,.25);transform:translateY(-2px)}
.dl-card .top{display:flex;align-items:center;gap:14px}
.dl-card .ic{width:44px;height:44px;border-radius:12px;background:var(--bg);border:1px solid var(--line-strong);display:grid;place-items:center;color:var(--fg-mute);flex-shrink:0}
.dl-card .name{font-size:18px;font-weight:600}
.dl-card .sub2{font-size:13px;color:var(--fg-mute);font-family:var(--mono)}
.dl-card ul{margin:0;padding-left:18px;color:var(--fg-mute);font-size:13.5px;line-height:1.8}
.dl-card .actions{display:flex;gap:10px;margin-top:auto}
.dl-card .actions a{flex:1;padding:11px 14px;border-radius:10px;border:1px solid var(--line-strong);background:var(--bg-elev);text-align:center;font-size:13.5px;font-weight:600;color:var(--fg);transition:border-color .2s,color .2s,filter .2s}
.dl-card .actions a.primary{background:var(--acc);color:#fff;border-color:#5AC8FA}
.dl-card .actions a:hover{border-color:var(--acc);color:var(--acc)}
.dl-card .actions a.primary:hover{color:#fff;filter:brightness(1.12)}

.faq{margin-top:40px;display:flex;flex-direction:column;gap:10px}
.faq details{border:1px solid var(--line);border-radius:12px;background:var(--bg-soft);padding:0;transition:border-color .2s}
.faq details[open]{border-color:var(--line-strong)}
.faq summary{padding:18px 20px;font-weight:600;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;user-select:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--fg-mute);font-size:20px;line-height:1;transition:transform .25s,color .2s;flex-shrink:0}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--acc)}
.faq summary:hover{color:var(--fg)}
.faq .a{padding:0 20px 18px;color:var(--fg-mute);font-size:14px;line-height:1.7}
.faq .a code{background:var(--bg);border:1px solid var(--line);padding:1px 6px;border-radius:5px;font-size:12.5px;color:var(--acc-2)}

footer{padding:50px 0 40px;border-top:1px solid var(--line);color:var(--fg-dim);font-size:13px}
.foot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}
.foot-links a{transition:color .15s}
.foot-links a:hover{color:var(--fg)}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

/* ── light mode ── */
@media (prefers-color-scheme:light){
  html:not([data-theme]){
    --bg:#f5f7fa;--bg-soft:#eef1f5;--bg-elev:#ffffff;
    --bg-code:#e8ecf2;--bg-card-end:#eef1f5;--bg-grid-card:#e8ecf2;--bg-dl-end:#eef1f5;
    --bg-footer-strip:rgba(0,0,0,.04);--pill-bg:rgba(0,0,0,.03);
    --line:#dde1e7;--line-strong:#c8cdd5;
    --fg:#0f1117;--fg-mute:#525c6a;--fg-dim:#7a8694;
    --acc:#0060cc;--acc-2:#0A84FF;
    --green:#1a7f35;--red:#c53030;--blue:#2b52c8;
    --nav-bg:rgba(245,247,250,.92);--nav-panel-bg:rgba(245,247,250,.97);
  }
  html:not([data-theme]) body{background:radial-gradient(1200px 600px at 80% -10%,rgba(10,132,255,.07),transparent 60%),radial-gradient(900px 500px at -10% 10%,rgba(10,132,255,.04),transparent 60%),var(--bg)}
  html:not([data-theme]) h1 .grad{background:linear-gradient(180deg,#0f1117 0%,#0060cc 60%,#0A84FF 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
}
html[data-theme="light"]{
  --bg:#f5f7fa;--bg-soft:#eef1f5;--bg-elev:#ffffff;
  --bg-code:#e8ecf2;--bg-card-end:#eef1f5;--bg-grid-card:#e8ecf2;--bg-dl-end:#eef1f5;
  --bg-footer-strip:rgba(0,0,0,.04);--pill-bg:rgba(0,0,0,.03);
  --line:#dde1e7;--line-strong:#c8cdd5;
  --fg:#0f1117;--fg-mute:#525c6a;--fg-dim:#7a8694;
  --acc:#0060cc;--acc-2:#0A84FF;
  --green:#1a7f35;--red:#c53030;--blue:#2b52c8;
  --nav-bg:rgba(245,247,250,.92);--nav-panel-bg:rgba(245,247,250,.97);
}
html[data-theme="light"] body{background:radial-gradient(1200px 600px at 80% -10%,rgba(10,132,255,.07),transparent 60%),radial-gradient(900px 500px at -10% 10%,rgba(10,132,255,.04),transparent 60%),var(--bg)}
html[data-theme="light"] h1 .grad{background:linear-gradient(180deg,#0f1117 0%,#0060cc 60%,#0A84FF 100%);-webkit-background-clip:text;background-clip:text;color:transparent}