/* ============================================================================
   Qiao VPN — "Bridge of light" design system. Self-hosted, no CDN.
   Direction: a midnight-teal night crossed by warm lantern light (amber).
   Serif display (Fraunces) carries personality; Manrope for UI; jade = status only.
   Fonts loaded via assets/fonts.css (linked before this file).
   ========================================================================== */

:root{
  /* two-temperature palette: cool night + warm light */
  --ink:#0b1a24; --ink-1:#0e2330; --ink-2:#12303f; --ink-3:#173b4d;
  --line:rgba(180,214,214,.10); --line-2:rgba(180,214,214,.18);
  --paper:#f4eee2;                 /* warm off-white for display headings */
  --fg:#d9e5e6; --fg-soft:#93a7ac; --fg-mute:#617a80;
  --amber:#f0b45b; --amber-deep:#d9963a; --amber-soft:#f6cf95;  /* signature accent */
  --jade:#45d6a3;                  /* status only: connected / secure */
  --rose:#f0857f;                  /* error/negative in comparisons */
  --on-amber:#241505;              /* text on amber */

  /* type scale (Elements of Typographic Style-ish, ~1.28) */
  --t--1:clamp(.8rem,.78rem + .1vw,.86rem);
  --t-0:clamp(1rem,.97rem + .16vw,1.08rem);
  --t-1:clamp(1.18rem,1.1rem + .35vw,1.4rem);
  --t-2:clamp(1.5rem,1.32rem + .8vw,2.1rem);
  --t-3:clamp(2rem,1.65rem + 1.6vw,3.1rem);
  --t-4:clamp(2.7rem,2.05rem + 2.9vw,4.6rem);
  --t-5:clamp(3.3rem,2.3rem + 4.6vw,6rem);

  --s1:.5rem; --s2:1rem; --s3:1.5rem; --s4:2rem; --s5:3rem; --s6:4.5rem; --s7:7rem;
  --r-sm:6px; --r-md:12px; --r-lg:20px; --r-xl:28px; --r-pill:999px;
  --wrap:1180px;
  --serif:"Fraunces","Times New Roman",Georgia,serif;
  --sans:"Manrope",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-display:var(--serif);
  --font-body:var(--sans);
  --sh-1:0 18px 40px -26px rgba(0,0,0,.75);
  --sh-2:0 40px 80px -40px rgba(0,0,0,.85);
}
/* per-script overrides: CJK + Cyrillic have no Fraunces, so use a strong sans */
:root[lang="zh-Hans"]{ --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei","Manrope",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Manrope",sans-serif; }
:root[lang="ru"]{ --font-display:"Manrope",system-ui,sans-serif; }

*,*::before,*::after{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--font-body);font-size:var(--t-0);line-height:1.6;color:var(--fg);
  background:var(--ink);letter-spacing:-.006em;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:hidden}
/* ambient warm light from upper-right (the "lantern") + faint grain */
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(52rem 40rem at 82% -10%,rgba(240,180,91,.14),transparent 62%),
    radial-gradient(46rem 42rem at 6% 8%,rgba(69,214,163,.06),transparent 58%),
    linear-gradient(180deg,var(--ink),#0a1620 60%,#0a141d)}
body::after{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.03;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
main,header,footer{position:relative;z-index:1}

h1,h2,h3{font-family:var(--font-display);color:var(--paper);font-weight:500;line-height:1.04;letter-spacing:-.02em}
h1{font-size:var(--t-5);font-weight:400}
h2{font-size:var(--t-3);font-weight:500}
h3{font-family:var(--font-body);font-size:var(--t-1);font-weight:700;color:var(--paper);letter-spacing:-.01em;line-height:1.2}
:root[lang="zh-Hans"] h1,:root[lang="zh-Hans"] h2{font-weight:600;letter-spacing:0;line-height:1.22}
p{color:var(--fg-soft)}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(1.15rem,4vw,2.2rem)}
.lead{font-size:var(--t-1);color:var(--fg-soft);line-height:1.55;max-width:46ch;font-weight:400}
.muted{color:var(--fg-mute)} .center{text-align:center}
.section{padding-block:clamp(3.4rem,7.5vw,6.5rem)}
/* editorial kicker: small amber label with a short rule, no italic, no caps */
.kicker{display:inline-flex;align-items:center;gap:.55rem;font-family:var(--font-body);font-weight:700;
  font-size:var(--t--1);color:var(--amber);letter-spacing:.01em}
.kicker::before{content:"";width:1.5rem;height:2px;border-radius:2px;background:var(--amber);flex:0 0 auto}
.center .kicker{justify-content:center}

/* ---------- header ---------- */
.site-head{position:sticky;top:0;z-index:60;background:color-mix(in srgb,var(--ink) 78%,transparent);
  backdrop-filter:blur(16px) saturate(140%);border-bottom:1px solid var(--line)}
.site-head .bar{display:flex;align-items:center;gap:var(--s3);height:74px}
.brand{display:flex;align-items:center;gap:.55rem;font-family:var(--serif);font-weight:600;font-size:1.28rem;
  color:var(--paper);letter-spacing:-.02em}
:root[lang="zh-Hans"] .brand{font-family:var(--font-body)}
.brand .mark{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex:0 0 auto;
  background:linear-gradient(150deg,var(--amber),var(--amber-deep));
  box-shadow:0 0 0 1px rgba(240,180,91,.3),0 10px 26px -12px rgba(240,180,91,.7)}
.brand .zh{font-family:var(--font-body);font-size:.7rem;color:var(--fg-mute);align-self:center}
.nav{display:none;gap:var(--s3);margin-inline-start:var(--s2)}
.nav a{font-size:var(--t--1);color:var(--fg-soft);position:relative;padding-block:.4rem;font-weight:600}
.nav a:hover{color:var(--fg)} .nav a.active{color:var(--amber)}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--amber);border-radius:2px}
.head-cta{margin-inline-start:auto;display:flex;align-items:center;gap:var(--s2)}
.langsel{position:relative}
.langsel>button{display:inline-flex;align-items:center;gap:.4rem;background:var(--ink-1);border:1px solid var(--line-2);
  color:var(--fg-soft);font:inherit;font-size:var(--t--1);font-weight:600;cursor:pointer;padding:.5rem .75rem;
  border-radius:var(--r-pill);white-space:nowrap;transition:border-color .2s,color .2s}
.langsel>button:hover{color:var(--fg);border-color:var(--amber)}
.langsel>button svg{width:1.05em;height:1.05em;flex:0 0 auto;opacity:.8}
.langsel .chev{width:.8em;height:.8em;transition:transform .2s}
.langsel.open .chev{transform:rotate(180deg)}
.langmenu{position:absolute;right:0;top:calc(100% + .5rem);min-width:180px;padding:.4rem;background:var(--ink-1);
  border:1px solid var(--line-2);border-radius:var(--r-md);box-shadow:var(--sh-2);display:none;flex-direction:column}
.langsel.open .langmenu{display:flex}
.langmenu a{padding:.55rem .7rem;border-radius:8px;color:var(--fg-soft);font-size:var(--t--1);font-weight:600;cursor:pointer}
.langmenu a:hover{background:var(--ink-2);color:var(--fg)}
.langmenu a[aria-current="true"]{color:var(--amber)}
.burger{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:10px;background:var(--ink-1);
  border:1px solid var(--line-2);color:var(--fg);cursor:pointer}
.mobile-nav{display:none;flex-direction:column;gap:.1rem;padding:var(--s2) 0 var(--s3);border-top:1px solid var(--line)}
.mobile-nav.open{display:flex}
.mobile-nav a{padding:.65rem .2rem;color:var(--fg-soft);font-weight:600}
@media(min-width:980px){.nav{display:flex}.burger{display:none}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-body);font-weight:700;
  font-size:var(--t--1);padding:.72rem 1.2rem;border-radius:var(--r-pill);cursor:pointer;border:1px solid transparent;
  transition:background .2s,color .2s,border-color .2s,box-shadow .25s;white-space:nowrap;line-height:1}
.btn svg{width:1.05em;height:1.05em}
.btn-primary{color:var(--on-amber);background:var(--amber);box-shadow:0 12px 30px -14px rgba(240,180,91,.75)}
.btn-primary:hover{background:var(--amber-soft);box-shadow:0 16px 40px -16px rgba(240,180,91,.9)}
.btn-ghost{color:var(--paper);background:transparent;border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--fg-soft);background:var(--ink-1)}
.btn-quiet{color:var(--fg-soft);background:transparent}
.btn-quiet:hover{color:var(--paper)}
.btn-lg{padding:.95rem 1.7rem;font-size:var(--t-0)}

/* ---------- surfaces ---------- */
.panel{background:linear-gradient(180deg,var(--ink-1),color-mix(in srgb,var(--ink-1) 60%,var(--ink)));
  border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1)}
.card{background:var(--ink-1);border:1px solid var(--line);border-radius:var(--r-lg);padding:var(--s3)}
.chip{display:inline-flex;align-items:center;gap:.45rem;font-size:var(--t--1);font-weight:600;padding:.34rem .75rem;
  border-radius:var(--r-pill);border:1px solid var(--line-2);color:var(--fg-soft);background:var(--ink-1)}
.chip .dot{width:7px;height:7px;border-radius:50%;background:var(--jade);box-shadow:0 0 10px var(--jade)}
.icon-badge{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex:0 0 auto;color:var(--amber);
  background:color-mix(in srgb,var(--amber) 13%,transparent);border:1px solid color-mix(in srgb,var(--amber) 26%,transparent)}
.icon-badge svg{width:23px;height:23px}

/* ---------- hero ---------- */
.hero{padding-block:clamp(3rem,7vw,5.5rem) clamp(2rem,4vw,3.5rem)}
.hero-grid{display:grid;gap:var(--s5);align-items:center}
@media(min-width:980px){.hero-grid{grid-template-columns:1.08fr .92fr}}
.hero .kicker{display:inline-block;margin-bottom:1rem}
.hero h1{max-width:15ch;margin-bottom:1.2rem}
.hero h1 em{color:var(--amber);font-weight:400}   /* the one accent, in-family */
.hero .lead{max-width:47ch;margin-bottom:1.8rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:var(--s2);align-items:center}
.trust-row{display:flex;flex-wrap:wrap;gap:1.4rem;margin-top:var(--s4);align-items:center}
.trust-row .t{display:flex;align-items:center;gap:.5rem;color:var(--fg-mute);font-size:var(--t--1);font-weight:500}
.trust-row .t svg{width:1.1em;height:1.1em;color:var(--jade)}

/* connection panel (quieter than before; type is the hero, this is support) */
.conn{position:relative;border-radius:var(--r-xl);padding:1.2rem;background:linear-gradient(180deg,var(--ink-2),var(--ink-1));
  border:1px solid var(--line-2);box-shadow:var(--sh-2)}
.conn .glow{position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(50% 55% at 82% 4%,rgba(240,180,91,.16),transparent 60%)}
.conn-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:.9rem;margin-bottom:1rem;
  border-bottom:1px solid var(--line)}
.conn-top .dots{display:flex;gap:.35rem} .conn-top .dots i{width:9px;height:9px;border-radius:50%;background:var(--ink-3)}
.arc{position:relative;display:grid;place-items:center;padding:.6rem 0}
.arc svg{width:150px;height:150px}
.arc .lab{position:absolute;inset:0;display:grid;place-content:center;text-align:center;gap:.25rem}
.arc .lab .st{font-family:var(--font-body);font-size:var(--t--1);font-weight:700;color:var(--jade);letter-spacing:.02em}
.telemetry{display:grid;grid-template-columns:repeat(3,1fr);gap:.55rem;margin-top:.5rem}
.telemetry .m{background:var(--ink);border:1px solid var(--line);border-radius:var(--r-md);padding:.7rem .8rem}
.telemetry .m .k{font-size:.7rem;color:var(--fg-mute);font-weight:600}
.telemetry .m .v{font-family:var(--serif);font-size:1.4rem;font-weight:500;color:var(--paper);margin-top:.1rem}
:root[lang="zh-Hans"] .telemetry .m .v{font-family:var(--font-body)}

/* ---------- pillars: editorial split-row list, NOT a 4-card kit ---------- */
.pillars{display:grid;gap:0;border-top:1px solid var(--line)}
.pillar{display:grid;gap:.8rem 1.4rem;grid-template-columns:1fr;padding:var(--s4) 0;border-bottom:1px solid var(--line)}
@media(min-width:760px){.pillar{grid-template-columns:auto 1fr;align-items:start}}
.pillar .lead-in{display:flex;align-items:center;gap:1rem;min-width:16rem}
.pillar .n{font-family:var(--serif);font-size:1.05rem;color:var(--amber);width:1.6rem;flex:0 0 auto}
.pillar h3{margin:0}
.pillar p{max-width:52ch;margin:0}

/* ---------- comparison table ---------- */
.tbl-wrap{overflow-x:auto}
table.cmp{width:100%;border-collapse:collapse;min-width:560px}
table.cmp th,table.cmp td{padding:1rem 1.15rem;text-align:left;font-size:var(--t--1);border-bottom:1px solid var(--line);vertical-align:top}
table.cmp thead th{font-weight:600;color:var(--fg-mute);border-bottom-color:var(--line-2)}
table.cmp thead th.us{color:var(--amber);font-family:var(--serif);font-size:var(--t-0)}
:root[lang="zh-Hans"] table.cmp thead th.us,:root[lang="ru"] table.cmp thead th.us{font-family:var(--font-body);font-style:normal}
table.cmp td.us{color:var(--paper);font-weight:600}
table.cmp tr:hover td{background:color-mix(in srgb,var(--amber) 4%,transparent)}
table.cmp td.g{color:var(--jade)} table.cmp td.b{color:var(--rose)} table.cmp td.a{color:var(--fg-mute)}
table.cmp td:first-child,table.cmp th:first-child{color:var(--fg);font-weight:600}
.us-col{position:relative}

/* ---------- stat band ---------- */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s4) var(--s3)}
@media(min-width:760px){.stats{grid-template-columns:repeat(4,1fr)}}
.stats .item{border-left:2px solid var(--line-2);padding-left:1.1rem}
.stats .n{font-family:var(--serif);font-size:var(--t-4);font-weight:400;color:var(--paper);line-height:1}
.stats .n b{color:var(--amber);font-weight:400}
:root[lang="zh-Hans"] .stats .n{font-family:var(--font-body);font-weight:600}
.stats .k{font-size:var(--t--1);color:var(--fg-mute);margin-top:.5rem;font-weight:500}

/* ---------- smart flow ---------- */
.route-list{display:grid;gap:.7rem}
.route{display:flex;align-items:center;justify-content:space-between;gap:1rem;background:var(--ink);
  border:1px solid var(--line);border-radius:var(--r-md);padding:.85rem 1.05rem}
.route .l{display:flex;align-items:center;gap:.7rem;color:var(--fg);font-size:var(--t--1);font-weight:500}
.route .tag{font-size:.7rem;font-weight:700;letter-spacing:.04em;padding:.24rem .6rem;border-radius:var(--r-pill);border:1px solid}
.tag-direct{color:var(--jade);border-color:color-mix(in srgb,var(--jade) 40%,transparent)}
.tag-tunnel{color:var(--amber);border-color:color-mix(in srgb,var(--amber) 40%,transparent)}
.tag-custom{color:var(--fg-soft);border-color:var(--line-2)}
.bullets{list-style:none;padding:0;display:grid;gap:.7rem}
.bullets li{display:flex;gap:.65rem;align-items:flex-start;font-size:var(--t-0);color:var(--fg-soft)}
.bullets li svg{width:1.2em;height:1.2em;color:var(--amber);flex:0 0 auto;margin-top:.15em}

/* ---------- pricing ---------- */
.seg{display:inline-flex;padding:.28rem;gap:.2rem;background:var(--ink-1);border:1px solid var(--line-2);border-radius:var(--r-pill)}
.seg button{font:inherit;font-size:var(--t--1);font-weight:700;color:var(--fg-soft);border:0;cursor:pointer;
  padding:.5rem 1.05rem;border-radius:var(--r-pill);background:transparent;white-space:nowrap;transition:color .2s,background .2s}
.seg button .save{font-size:.66rem;color:var(--amber);margin-inline-start:.35rem}
.seg button.on{color:var(--on-amber);background:var(--amber)} .seg button.on .save{color:var(--on-amber);opacity:.75}
.price-grid{display:grid;gap:var(--s3);grid-template-columns:1fr}
@media(min-width:820px){.price-grid{grid-template-columns:1fr 1fr}}
.plan{position:relative;display:flex;flex-direction:column;gap:var(--s2);padding:var(--s4)}
.plan.feat-plan{border-color:color-mix(in srgb,var(--amber) 45%,transparent);
  box-shadow:0 0 0 1px color-mix(in srgb,var(--amber) 30%,transparent),var(--sh-2)}
.plan .ribbon{position:absolute;top:-.75rem;right:1.4rem;font-size:.68rem;font-weight:700;letter-spacing:.03em;
  color:var(--on-amber);background:var(--amber);padding:.28rem .7rem;border-radius:var(--r-pill)}
.plan .pname{font-family:var(--serif);font-size:var(--t-2);font-weight:500;color:var(--paper)}
:root[lang="zh-Hans"] .plan .pname{font-family:var(--font-body);font-weight:700}
.plan .paud{font-size:var(--t--1);color:var(--fg-mute)}
.plan .pprice{display:flex;align-items:baseline;gap:.25rem;margin-top:.5rem}
.plan .pprice .cur{font-size:1.2rem;color:var(--fg-soft);font-weight:600}
.plan .pprice .amt{font-family:var(--serif);font-size:var(--t-4);font-weight:400;color:var(--paper);line-height:1}
:root[lang="zh-Hans"] .plan .pprice .amt{font-family:var(--font-body);font-weight:600}
.plan .pprice .per{font-size:var(--t--1);color:var(--fg-mute)}
.plan .pbill{font-size:var(--t--1);color:var(--fg-mute)}
.plan .pbill s{opacity:.65;margin-inline-end:.4rem}
.plan ul{list-style:none;padding:0;display:grid;gap:.65rem;margin-top:.3rem}
.plan li{display:flex;gap:.6rem;align-items:flex-start;font-size:var(--t--1);color:var(--fg-soft)}
.plan li svg{width:1.15em;height:1.15em;color:var(--jade);flex:0 0 auto;margin-top:.12em}
.plan li.off{color:var(--fg-mute)} .plan li.off svg{color:var(--fg-mute)}
.divider{height:1px;background:var(--line);border:0;margin:.2rem 0}

/* pay strip */
.paystrip{display:flex;flex-wrap:wrap;gap:.7rem;align-items:center;justify-content:center}
.paystrip .pl{height:34px;display:inline-flex;align-items:center;gap:.5rem;padding:.4rem .8rem;border:1px solid var(--line);
  border-radius:10px;background:var(--ink-1);color:var(--fg-soft);font-size:var(--t--1);font-weight:600}
.paystrip .pl svg{height:18px;width:auto}

/* FAQ */
.faq{display:grid;gap:.6rem;max-width:800px;margin-inline:auto}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:1.1rem .2rem;display:flex;justify-content:space-between;gap:1rem;
  align-items:center;font-family:var(--font-body);font-weight:700;color:var(--paper);font-size:var(--t-0)}
.faq summary::-webkit-details-marker{display:none}
.faq summary .ic{transition:transform .3s;color:var(--amber);flex:0 0 auto}
.faq details[open] summary .ic{transform:rotate(45deg)}
.faq .a{padding:0 .2rem 1.1rem;color:var(--fg-soft);font-size:var(--t-0);max-width:70ch}

/* CTA band */
.cta{position:relative;overflow:hidden;border-radius:var(--r-xl);border:1px solid var(--line-2);
  padding:clamp(2.4rem,6vw,4.5rem);text-align:center;background:linear-gradient(160deg,var(--ink-2),var(--ink-1))}
.cta::before{content:"";position:absolute;left:50%;top:-30%;width:90%;height:80%;transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(240,180,91,.22),transparent);pointer-events:none}
.cta h2{margin-bottom:.7rem} .cta .lead{margin:0 auto 1.8rem}

/* footer */
.site-foot{border-top:1px solid var(--line);background:#0a151d;margin-top:var(--s6)}
.foot-top{display:flex;flex-wrap:wrap;gap:var(--s2);justify-content:space-between;align-items:center;
  padding-block:var(--s3);border-bottom:1px solid var(--line);color:var(--fg-mute);font-size:var(--t--1)}
.foot-grid{display:grid;gap:var(--s4);grid-template-columns:1fr;padding-block:var(--s4)}
@media(min-width:720px){.foot-grid{grid-template-columns:1.7fr 1fr 1fr 1fr}}
.foot-grid h4{font-family:var(--font-body);font-size:.78rem;letter-spacing:.02em;color:var(--fg-mute);font-weight:700;
  margin-bottom:var(--s2)}
.foot-grid ul{list-style:none;padding:0;display:grid;gap:.55rem}
.foot-grid a{color:var(--fg-soft);font-size:var(--t--1)} .foot-grid a:hover{color:var(--paper)}
.foot-bottom{display:flex;flex-wrap:wrap;gap:var(--s2);justify-content:space-between;padding-block:var(--s3);
  border-top:1px solid var(--line);color:var(--fg-mute);font-size:var(--t--1)}

/* one orchestrated reveal (hero only, staggered); sections do not all fade-up */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.arc svg .spin{transform-origin:75px 75px;animation:spin 14s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.spin{animation:none}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}