/* 五次元官网 · 公共样式 */
:root{
  --blue:#2F6BFF;--blue-2:#1D4ED8;--blue-3:#0B3BD9;--cyan:#22D3EE;--violet:#7C5CFF;--red:#F43F5E;--green:#10B981;
  --ink:#0B1530;--ink-2:#46536F;--ink-3:#64748B;--line:rgba(47,107,255,.14);--line-2:rgba(47,107,255,.26);
  --bg:#F6F8FD;--card:rgba(255,255,255,.78);
  --ease:cubic-bezier(.16,1,.3,1);
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --r:20px;
  --sh:0 24px 60px -28px rgba(30,60,140,.35),0 0 0 1px rgba(47,107,255,.07);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;color:var(--ink);background:var(--bg);overflow-x:hidden;-webkit-font-smoothing:antialiased;line-height:1.6}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;cursor:pointer}
.wrap{width:min(1320px,92vw);margin:0 auto}
.mono{font-family:var(--mono)}
.grad{background:linear-gradient(100deg,var(--blue) 0%,#5B8CFF 35%,var(--violet) 70%,var(--blue) 100%);background-size:200% auto;-webkit-background-clip:text;background-clip:text;color:transparent;animation:shine 6s linear infinite}
@keyframes shine{to{background-position:200% center}}

/* ---------- NAV ---------- */
.nav{position:fixed;inset:0 0 auto;z-index:90;height:68px;display:flex;align-items:center;transition:background .4s,box-shadow .4s}
.nav.scrolled{background:rgba(255,255,255,.75);backdrop-filter:blur(14px) saturate(1.4);-webkit-backdrop-filter:blur(14px) saturate(1.4);box-shadow:0 1px 0 var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px}
.nav .logo img{height:34px;width:auto}
.menu{display:flex;gap:34px;list-style:none;font-size:15px;color:var(--ink-2);align-items:center}
.menu>li{position:relative}
.menu>li>a{position:relative;padding:22px 0;display:block;transition:color .2s}
.menu>li>a:hover,.menu>li>a.on{color:var(--blue)}
.menu>li>a.on::after{content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--cyan))}
.drop{position:absolute;left:50%;top:100%;transform:translate(-50%,8px);width:460px;padding:14px;border-radius:18px;background:rgba(255,255,255,.96);box-shadow:var(--sh);backdrop-filter:blur(14px);display:grid;grid-template-columns:1fr 1fr;gap:6px;opacity:0;visibility:hidden;transition:.3s var(--ease)}
.menu li:hover .drop,.menu li.open .drop{opacity:1;visibility:visible;transform:translate(-50%,0)}
.drop a{display:flex;gap:12px;padding:12px;border-radius:12px;transition:background .2s}
.drop a:hover{background:rgba(47,107,255,.07)}
.drop b{display:block;font-size:14px;color:var(--ink)}.drop small{font-size:12px;color:var(--ink-3)}
.drop .ic{width:34px;height:34px;flex:none}
.drop .feat{grid-column:1/-1;background:linear-gradient(135deg,rgba(47,107,255,.08),rgba(124,92,255,.08))}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:600;border:0;transition:transform .3s var(--ease),box-shadow .3s,color .2s,border-color .2s;position:relative;overflow:hidden;white-space:nowrap}
.btn-p{color:#fff;background:linear-gradient(135deg,var(--blue),#4F8BFF 60%,var(--cyan));box-shadow:0 8px 24px -8px rgba(47,107,255,.6),inset 0 1px 0 rgba(255,255,255,.35)}
.btn-p::after{content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);transform:skewX(-20deg);animation:sweep 3.6s ease-in-out infinite}
@keyframes sweep{0%,60%{left:-60%}100%{left:130%}}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(47,107,255,.75)}
.btn-g{color:var(--ink);background:rgba(255,255,255,.75);border:1px solid var(--line-2)}
.btn-g:hover{border-color:var(--blue);color:var(--blue)}
.nav .btn{height:38px;font-size:14px;padding:0 18px}
.burger{display:none;width:42px;height:42px;border:0;background:none;position:relative;z-index:95}
.lang-sw{display:flex;align-items:center;gap:5px;font-size:12.5px;font-weight:600;color:var(--ink-3);flex:none;margin-right:2px}
.lang-sw a{color:inherit;padding:3px 1px;transition:color .2s}
.lang-sw a:hover{color:var(--blue)}
.lang-sw a.on{color:var(--blue)}
.lang-sw i{font-style:normal;color:var(--line-2)}
.burger i{display:block;width:20px;height:2px;margin:4px auto;background:var(--ink);border-radius:2px;transition:.3s}
.nav.open .burger i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav.open .burger i:nth-child(2){opacity:0}
.nav.open .burger i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- BACKGROUND ---------- */
.bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg .grid{position:absolute;inset:-2px;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 75% 65% at 60% 40%,#000 15%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse 75% 65% at 60% 40%,#000 15%,transparent 75%);opacity:.65}
.bg canvas{position:absolute;inset:0;width:100%;height:100%}
.glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.6}
.g1{width:46vw;height:46vw;left:44%;top:2%;background:radial-gradient(circle,rgba(47,107,255,.38),transparent 65%);animation:drift 18s ease-in-out infinite}
.g2{width:30vw;height:30vw;left:70%;top:45%;background:radial-gradient(circle,rgba(124,92,255,.28),transparent 65%);animation:drift 22s ease-in-out infinite reverse}
.g3{width:26vw;height:26vw;left:-6%;top:56%;background:radial-gradient(circle,rgba(34,211,238,.24),transparent 65%);animation:drift 26s ease-in-out infinite}
@keyframes drift{50%{transform:translate(4vw,-3vh) scale(1.08)}}
.spot{position:fixed;z-index:1;pointer-events:none;width:520px;height:520px;margin:-260px 0 0 -260px;border-radius:50%;background:radial-gradient(closest-side,rgba(47,107,255,.10),transparent);left:0;top:0;will-change:transform}

main,footer{position:relative;z-index:2}

/* ---------- SECTIONS ---------- */
.sec{position:relative;min-height:100vh;min-height:100svh;padding:120px 0 90px;display:flex;align-items:center}
.sec>.wrap{width:min(1320px,92vw)}
.sec-head{max-width:820px;margin-bottom:52px}
.sec-head.c{text-align:center;margin-left:auto;margin-right:auto}
.label{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:13px;letter-spacing:.16em;color:var(--blue)}
.label::before{content:"";width:22px;height:1px;background:currentColor}
.sec-head.c .label::after{content:"";width:22px;height:1px;background:currentColor}
h2.t{font-size:clamp(28px,3.2vw,48px);line-height:1.22;margin:16px 0 16px;font-weight:800;letter-spacing:-.01em}
.sub{font-size:clamp(15px,1.1vw,18px);color:var(--ink-2);line-height:1.8}
.foot-note{margin-top:40px;text-align:center;font-size:15px;color:var(--ink-2)}
.foot-note b{color:var(--blue)}
.glass{background:var(--card);border:1px solid rgba(255,255,255,.95);box-shadow:var(--sh);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:var(--r)}
.ic{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;color:#fff;background:linear-gradient(140deg,#5B8CFF,var(--blue-2));box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 8px 16px -8px rgba(47,107,255,.8)}
.ic svg{width:55%;height:55%}
.tag{display:inline-block;font-size:12px;padding:4px 10px;border-radius:999px;background:rgba(47,107,255,.08);color:var(--blue);font-weight:600}
.num{font-family:var(--mono);font-weight:800;letter-spacing:-.02em;background:linear-gradient(120deg,var(--blue),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}

/* reveal */
.rv{opacity:0;transform:translateY(34px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv.in{opacity:1;transform:none}
.rv.l{transform:translateX(-40px)}.rv.r{transform:translateX(40px)}.rv.s{transform:scale(.92)}
.rv.in.l,.rv.in.r,.rv.in.s{transform:none}

/* tilt */
.tilt{transform-style:preserve-3d;transition:transform .5s var(--ease),box-shadow .3s}
.tilt .shine{position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:radial-gradient(400px circle at var(--mx,50%) var(--my,50%),rgba(255,255,255,.55),transparent 40%);opacity:0;transition:opacity .3s}
.tilt:hover .shine{opacity:1}

/* progress dots */
.dots{position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:80;display:flex;flex-direction:column;gap:10px}
.dots a{position:relative;width:4px;height:20px;border-radius:2px;background:rgba(47,107,255,.2);transition:background .3s,height .3s}
.dots a.on{background:var(--blue);height:36px}
.dots a span{position:absolute;right:14px;top:50%;transform:translateY(-50%);white-space:nowrap;font-size:12px;color:var(--ink-2);opacity:0;transition:.2s;pointer-events:none;background:#fff;padding:3px 8px;border-radius:6px;box-shadow:var(--sh)}
.dots a:hover span{opacity:1}

/* CTA + footer */
.cta-box{position:relative;overflow:hidden;border-radius:32px;padding:64px;color:#fff;background:radial-gradient(circle at 85% 20%,rgba(34,211,238,.45),transparent 40%),radial-gradient(circle at 10% 90%,rgba(124,92,255,.5),transparent 45%),linear-gradient(135deg,#0B3BD9,#2F6BFF 55%,#3E7BFF);display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center;box-shadow:0 40px 80px -30px rgba(29,78,216,.6)}
.cta-box::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:40px 40px;mask-image:linear-gradient(90deg,transparent,#000);-webkit-mask-image:linear-gradient(90deg,transparent,#000)}
.cta-box>*{position:relative}
.cta-box .label{color:rgba(255,255,255,.8)}
.cta-box h2{font-size:clamp(28px,3vw,44px);line-height:1.25;margin:14px 0}
.cta-box p{opacity:.85;line-height:1.8}
.cta-box .trust{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.cta-box .trust span{font-size:13px;padding:7px 14px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25)}
.cta-box .btn-w{background:#fff;color:var(--blue);margin-top:28px}
.qr{background:#fff;color:var(--ink);border-radius:22px;padding:22px;display:flex;gap:20px;align-items:center}
.qr img{width:140px;height:140px;border-radius:10px;flex:none}
.qr .meta{font-size:14px;display:grid;gap:10px;color:var(--ink-2)}
.qr .meta b{display:block;color:var(--ink);font-size:16px;margin-bottom:2px}
.qr .meta div{display:flex;gap:8px;align-items:flex-start}
.qr .meta svg{width:16px;height:16px;flex:none;margin-top:3px;color:var(--blue)}
.footer{padding:60px 0 34px;border-top:1px solid var(--line);background:#fff}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer h6{font-size:14px;margin-bottom:14px}
.footer ul{list-style:none;display:grid;gap:10px;font-size:14px;color:var(--ink-2)}
.footer a:hover{color:var(--blue)}
.footer .brand img{height:38px;width:auto;margin-bottom:16px}
.footer .brand p{font-size:14px;color:var(--ink-2);max-width:26em}
.footer .copy{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-3);line-height:1.9}

/* ---------- RESPONSIVE ---------- */
@media (max-width:1100px){.menu{gap:22px}.footer .cols{grid-template-columns:1fr 1fr}}
@media (max-width:900px){
  .burger{display:block}
  .nav .btn{display:none}
  .menu{position:fixed;inset:0;flex-direction:column;justify-content:center;gap:6px;background:rgba(255,255,255,.97);font-size:20px;opacity:0;visibility:hidden;transition:.3s}
  .nav.open .menu{opacity:1;visibility:visible}
  .menu>li>a{padding:12px}
  .menu>li>a.on::after{bottom:6px}
  .drop{display:grid;position:static;transform:none;width:100%;padding:6px 5vw 14px;background:transparent;box-shadow:none;backdrop-filter:none;-webkit-backdrop-filter:none;opacity:1;visibility:visible;grid-template-columns:1fr 1fr;gap:8px;text-align:left}
  .drop a{padding:12px;background:rgba(47,107,255,.06);border-radius:12px}
  .drop a.feat{grid-column:1/-1}
  .drop .ic{width:30px;height:30px;border-radius:9px}
  .drop b{font-size:14px}.drop small{font-size:11px}
  .sec{min-height:auto;padding:90px 0 60px}
  .sec-head{margin-bottom:32px}
  .dots{display:none}
  .cta-box{grid-template-columns:1fr;padding:36px 24px;border-radius:24px;gap:28px}
  .qr{flex-direction:column;text-align:center}.qr .meta div{justify-content:center}
  .footer .cols{grid-template-columns:1fr;gap:28px}
  .spot{display:none}
}
@media (max-height:760px) and (min-width:901px){.sec{padding:96px 0 60px}.sec-head{margin-bottom:34px}h2.t{font-size:clamp(26px,2.8vw,40px)}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.rv{opacity:1;transform:none}}
/* large / ultrawide monitors: scale content blocks so they don't look tiny */
@media (min-width:1900px) and (min-height:1000px){.sec>.wrap,.p-hero>.wrap,.nav .wrap,.footer .wrap{zoom:1.12}}
@media (min-width:2200px) and (min-height:1000px){.sec>.wrap,.p-hero>.wrap,.nav .wrap,.footer .wrap{zoom:1.25}}
@media (min-width:2400px) and (min-height:1300px){.sec>.wrap,.p-hero>.wrap,.nav .wrap,.footer .wrap{zoom:1.4}}