/* CYBERBRIDGE landing — cyberbri.xyz
   Self-contained: no external fonts/scripts. Brand tokens mirror the app design system. */

:root{
  --bg:#F5F4EE; --bg-elevated:#EDE9DB; --bg-inverse:#1A1A1A;
  --ink:#191919; --ink-2:#5C5C5C; --ink-muted:#8F8C82;
  --hairline:#D6D2C4; --hairline-strong:#B8B39E;
  --accent:#CC785C; --accent-ink:#B85C3F; --accent-wash:#EFDFD1;
  --ok:#4E7A52; --danger:#B14A3A;
  --focus:rgba(204,120,92,.30);
  --max:1160px; --gutter:32px; --radius:6px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Helvetica,Arial,sans-serif;
}

/* language toggle (CSS only) */
[data-lang="zh"] .en{display:none;}
[data-lang="en"] .zh{display:none;}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:17px;line-height:1.65;
  font-weight:400;letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--accent-ink);text-decoration:none;}
a:hover{text-decoration:underline;text-underline-offset:3px;}
strong{font-weight:600;}
img,svg{max-width:100%;}

.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter);}
.wrap.narrow{max-width:780px;}

:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus);border-radius:4px;}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:0 0 var(--radius) 0;z-index:100;}
.skip-link:focus{left:0;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(245,244,238,.86);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--hairline);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);}
.brand:hover{text-decoration:none;}
.brand-mark{width:30px;height:30px;flex:none;color:var(--ink);}
.brand-word{font-weight:500;letter-spacing:.20em;font-size:15px;}
.site-nav{display:flex;gap:26px;margin-left:8px;}
.site-nav a{color:var(--ink-2);font-size:14.5px;letter-spacing:.02em;}
.site-nav a:hover{color:var(--ink);text-decoration:none;}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:14px;}
.lang-toggle{background:none;border:1px solid var(--hairline-strong);color:var(--ink-2);font:inherit;font-size:13px;letter-spacing:.08em;padding:6px 11px;border-radius:999px;cursor:pointer;line-height:1;}
.lang-toggle:hover{border-color:var(--ink);color:var(--ink);}
.link-quiet{color:var(--ink-2);font-size:14.5px;}
.link-quiet:hover{color:var(--ink);text-decoration:none;}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:500;font-size:15px;letter-spacing:.01em;padding:11px 20px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:transform .12s ease,background .15s ease,border-color .15s ease;white-space:nowrap;}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-ink);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--hairline-strong);}
.btn-ghost:hover{border-color:var(--ink);}
.btn-lg{padding:14px 26px;font-size:16px;}
.btn-block{display:flex;width:100%;}

/* ---------- type ---------- */
.eyebrow,.kicker{font-size:12.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent-ink);font-weight:500;margin:0 0 18px;}
.display{font-weight:300;font-size:clamp(40px,6.4vw,76px);line-height:1.04;letter-spacing:-.02em;margin:0 0 24px;}
.section-title{font-weight:300;font-size:clamp(28px,3.6vw,42px);line-height:1.12;letter-spacing:-.015em;margin:0 0 18px;}
.lede{font-size:clamp(18px,2.1vw,22px);line-height:1.55;color:var(--ink-2);max-width:680px;margin:0 0 32px;font-weight:300;}
.section-intro{font-size:18px;color:var(--ink-2);max-width:720px;margin:0 0 40px;font-weight:300;}

/* ---------- hero ---------- */
.hero{padding:clamp(72px,11vw,140px) 0 clamp(56px,8vw,96px);border-bottom:1px solid var(--hairline);}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-note{font-size:14px;color:var(--ink-muted);max-width:560px;margin:0;border-left:2px solid var(--accent);padding-left:14px;}

/* ---------- sections ---------- */
.section{padding:clamp(72px,10vw,128px) 0;border-bottom:1px solid var(--hairline);}
.section-soft{background:var(--bg-elevated);}
.section-dark{background:var(--bg-inverse);color:#E9E6DC;}
.section-dark .section-title{color:#fff;}
.section-dark .kicker{color:#E0A88F;}
.section-dark .card-body{color:#B8B3A6;}

/* card grids */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cards-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.card{background:var(--bg-elevated);border:1px solid var(--hairline);border-radius:var(--radius);padding:30px 26px;}
.section-soft .card{background:var(--bg);}
.card-body{color:var(--ink-2);font-size:15.5px;margin:0;}

/* lines */
.line-card{position:relative;}
.line-op{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted);margin:0 0 6px;}
.line-name{font-size:26px;font-weight:300;letter-spacing:.01em;margin:0 0 14px;color:var(--ink);}
.fineprint{font-size:13.5px;color:var(--ink-muted);margin:34px 0 0;max-width:760px;}
.fineprint.center{text-align:center;margin-left:auto;margin-right:auto;}

/* security */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px 48px;margin-bottom:44px;}
.feature-title{font-size:19px;font-weight:500;letter-spacing:.01em;margin:0 0 10px;color:#fff;}
.honest-line{font-size:16px;color:#D8D3C6;max-width:760px;border-left:2px solid var(--accent);padding-left:16px;margin:0 0 40px;}
.trust-row{display:flex;flex-wrap:wrap;align-items:baseline;gap:14px;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-muted);margin:0;}
.trust-names{letter-spacing:.06em;color:#CFC9BB;font-size:15px;text-transform:none;}

/* pricing */
.billing-toggle{display:inline-flex;align-items:center;gap:6px;background:var(--bg-elevated);border:1px solid var(--hairline);border-radius:999px;padding:5px;margin-bottom:40px;}
.bt-opt{font:inherit;font-size:14px;border:none;background:none;color:var(--ink-2);padding:8px 18px;border-radius:999px;cursor:pointer;}
.bt-opt.is-active{background:var(--ink);color:var(--bg);}
.bt-hint{font-size:12.5px;color:var(--ink-muted);padding:0 12px 0 6px;}
.pricing-grid{align-items:start;}
.plan{display:flex;flex-direction:column;gap:8px;position:relative;}
.plan-kicker{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-muted);margin:0;}
.plan-name{font-size:24px;font-weight:400;margin:0;}
.plan-price{margin:6px 0 14px;display:flex;align-items:baseline;min-height:46px;}
.plan-price .amt{font-size:40px;font-weight:300;letter-spacing:-.02em;color:var(--ink);}
.plan-price .per{font-size:15px;color:var(--ink-muted);margin-left:4px;}
.plan-feats{list-style:none;margin:0 0 22px;padding:0;display:flex;flex-direction:column;gap:9px;flex:1;}
.plan-feats li{font-size:15px;color:var(--ink-2);padding-left:20px;position:relative;}
.plan-feats li::before{content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:50%;background:var(--accent);}
.plan-featured{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent);}
.plan-badge{position:absolute;top:-12px;right:18px;background:var(--accent);color:#fff;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;padding:4px 12px;border-radius:999px;margin:0;}
/* billing visibility */
.price-year{display:none;}
[data-billing="year"] .price-month{display:none;}
[data-billing="year"] .price-year{display:inline-flex;align-items:baseline;}

/* steps */
.steps{list-style:none;counter-reset:s;margin:0 0 40px;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.steps li{background:var(--bg);border:1px solid var(--hairline);border-radius:var(--radius);padding:28px 26px;}
.step-n{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;border:1px solid var(--accent);color:var(--accent-ink);font-size:15px;margin-bottom:14px;}
.step-title{font-size:18px;font-weight:500;margin:0 0 8px;}
.client-row{display:flex;flex-wrap:wrap;align-items:baseline;gap:14px;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-muted);margin:0 0 6px;}
.client-names{letter-spacing:.04em;color:var(--ink);font-size:16px;text-transform:none;}

/* faq */
.faq{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--hairline);margin-bottom:56px;}
.faq details{border-bottom:1px solid var(--hairline);}
.faq summary{list-style:none;cursor:pointer;padding:20px 36px 20px 0;font-size:17px;font-weight:500;position:relative;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";position:absolute;right:4px;top:18px;font-size:22px;font-weight:300;color:var(--accent);}
.faq details[open] summary::after{content:"–";}
.faq details p{margin:0 0 22px;color:var(--ink-2);font-size:15.5px;max-width:680px;}

/* cta band */
.cta-band{text-align:center;padding:48px 0 8px;}
.cta-title{font-weight:300;font-size:clamp(26px,3.4vw,38px);letter-spacing:-.015em;margin:0 0 24px;}

/* footer */
.site-footer{background:var(--bg-inverse);color:#B8B3A6;}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:32px;padding-top:56px;padding-bottom:36px;}
.footer-brand .brand-word{color:#fff;font-size:16px;}
.footer-tag{margin:12px 0 0;font-size:14px;max-width:320px;color:#9A958A;}
.footer-links{display:flex;flex-wrap:wrap;gap:14px 28px;align-content:flex-start;}
.footer-links a{color:#CFC9BB;font-size:14.5px;}
.footer-links a:hover{color:#fff;}
.footer-legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;border-top:1px solid #2E2E2A;padding-top:20px;padding-bottom:36px;font-size:12.5px;color:#7E796F;}
.footer-legal p{margin:0;}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .cards-3,.cards-4,.steps{grid-template-columns:1fr 1fr;}
  .feature-grid{grid-template-columns:1fr;gap:24px;}
}
@media (max-width:680px){
  :root{--gutter:20px;}
  body{font-size:16px;}
  .site-nav{display:none;}
  .header-inner{gap:12px;height:60px;}
  .signin{display:none;}
  .cards-3,.cards-4,.steps{grid-template-columns:1fr;}
  .billing-toggle{flex-wrap:wrap;}
  .footer-inner{flex-direction:column;gap:28px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .btn:hover{transform:none;}
}

/* ---------- error page ---------- */
.error{min-height:72vh;display:flex;align-items:center;text-align:center;}
.error .lede{margin-left:auto;margin-right:auto;}
.error .display{font-size:clamp(36px,6vw,64px);}