/* Proton-inspired dark theme */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;background:#12111d;color:#e8e6f3;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{margin:0;line-height:1.15;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(2.2rem,5vw,3.8rem)}
h2{font-size:clamp(1.7rem,3.5vw,2.5rem)}
h3{font-size:1.15rem}
p{margin:0}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.accent{background:linear-gradient(90deg,#8a7cff,#c69cff);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;border-radius:999px;font-weight:600;font-size:.95rem;transition:transform .15s ease,background .2s;border:1px solid transparent;cursor:pointer}
.btn-primary{background:linear-gradient(90deg,#7c5cff,#a37bff);color:#fff;box-shadow:0 8px 30px rgba(124,92,255,.35)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.2);color:#e8e6f3}
.btn-ghost:hover{background:rgba(255,255,255,.06)}
/* header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(18,17,29,.75);border-bottom:1px solid rgba(255,255,255,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.brand{font-weight:800;font-size:1.15rem;letter-spacing:-.01em;display:flex;align-items:center;gap:8px}
.brand .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,#a37bff,#7c5cff);box-shadow:0 0 12px #7c5cff}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:.94rem;opacity:.85}
.nav-links a:hover{opacity:1}
.nav-right{display:flex;gap:14px;align-items:center;position:relative}
.lang{position:relative}
.lang-btn{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);color:#e8e6f3;padding:8px 14px;border-radius:999px;font-size:.85rem;cursor:pointer}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);background:#1c1a2b;border:1px solid rgba(255,255,255,.1);border-radius:14px;min-width:160px;padding:6px;display:none;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.lang:hover .lang-menu,.lang:focus-within .lang-menu{display:block}
.lang-menu a{display:block;padding:9px 12px;border-radius:10px;font-size:.9rem}
.lang-menu a:hover{background:rgba(255,255,255,.06)}
.lang-menu a.active{color:#c69cff}
@media(max-width:820px){.nav-links{display:none}}
/* hero */
.hero{position:relative;padding:80px 0 60px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-20% -10% auto -10%;height:600px;background:radial-gradient(ellipse at 30% 20%,rgba(124,92,255,.28),transparent 60%),radial-gradient(ellipse at 80% 10%,rgba(198,156,255,.18),transparent 55%);z-index:-1;filter:blur(20px)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}
.kicker{display:inline-block;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);font-size:.8rem;letter-spacing:.05em;text-transform:uppercase;color:#c8c1ea;margin-bottom:22px}
.hero p.sub{margin-top:22px;font-size:1.1rem;color:#c0bcd8;max-width:560px}
.hero-actions{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.guarantee{margin-top:18px;font-size:.85rem;color:#8f8ab0}
.hero-media{aspect-ratio:1/1;border-radius:32px;overflow:hidden;background:linear-gradient(135deg,rgba(124,92,255,.3),rgba(18,17,29,0));box-shadow:0 40px 100px rgba(124,92,255,.25)}
.hero-media img{width:100%;height:100%;object-fit:cover}
/* sections */
section{padding:80px 0}
.section-head{max-width:720px;margin-bottom:48px}
.section-head p{margin-top:14px;color:#b0abd0}
/* feature grid */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:1024px){.features{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.features{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.015));border:1px solid rgba(255,255,255,.07);border-radius:22px;padding:24px;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-3px);border-color:rgba(163,123,255,.4)}
.card .img{aspect-ratio:16/10;border-radius:14px;overflow:hidden;margin-bottom:18px;background:#1a1826}
.card .img img{width:100%;height:100%;object-fit:cover}
.card h3{margin-bottom:8px}
.card p{color:#b0abd0;font-size:.92rem}
/* devices split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
@media(max-width:900px){.split{grid-template-columns:1fr}}
.split .img{border-radius:24px;overflow:hidden;aspect-ratio:4/3}
.split ul{list-style:none;padding:0;margin:24px 0 32px;display:grid;gap:12px}
.split li{padding-left:28px;position:relative;color:#c8c4e2}
.split li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,#a37bff,#7c5cff)}
/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
@media(max-width:700px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{padding:28px 12px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:20px}
.stat .num{font-size:2rem;font-weight:800;background:linear-gradient(90deg,#a37bff,#c69cff);-webkit-background-clip:text;color:transparent}
.stat .lbl{color:#b0abd0;font-size:.9rem;margin-top:6px}
/* cta banner */
.cta{background:linear-gradient(135deg,rgba(124,92,255,.18),rgba(198,156,255,.08));border:1px solid rgba(163,123,255,.3);border-radius:28px;padding:60px;text-align:center}
.cta p{margin:14px auto 26px;max-width:520px;color:#c8c4e2}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:900px){.plans{grid-template-columns:1fr}}
.plan{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.015));border:1px solid rgba(255,255,255,.08);border-radius:24px;padding:32px;display:flex;flex-direction:column}
.plan.highlight{border-color:rgba(163,123,255,.5);background:linear-gradient(180deg,rgba(124,92,255,.18),rgba(255,255,255,.02));box-shadow:0 30px 80px rgba(124,92,255,.15);position:relative}
.plan .tag{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:#c69cff;margin-bottom:12px}
.plan h3{font-size:1.4rem;margin-bottom:12px}
.plan .price{font-size:2.4rem;font-weight:800}
.plan .per{color:#8f8ab0;font-size:.9rem;margin-bottom:22px}
.plan ul{list-style:none;padding:0;margin:0 0 26px;display:grid;gap:10px;flex:1}
.plan li{position:relative;padding-left:22px;color:#c8c4e2;font-size:.92rem}
.plan li::before{content:"✓";position:absolute;left:0;color:#a37bff;font-weight:700}
/* faq */
.faq{max-width:800px;margin:0 auto}
.faq details{border-bottom:1px solid rgba(255,255,255,.08);padding:20px 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between}
.faq summary::after{content:"+";color:#a37bff;margin-left:12px}
.faq details[open] summary::after{content:"−"}
.faq p{margin-top:12px;color:#b0abd0}
/* products items grid */
.items{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1000px){.items{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.items{grid-template-columns:1fr}}
.item{padding:24px;border:1px solid rgba(255,255,255,.07);border-radius:18px;background:rgba(255,255,255,.02)}
.item h3{margin-bottom:8px;color:#e0d9ff}
.item p{color:#a8a3c6;font-size:.9rem}
/* download apps */
.apps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1000px){.apps-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.apps-grid{grid-template-columns:1fr}}
.app{padding:24px;border:1px solid rgba(255,255,255,.08);border-radius:18px;background:rgba(255,255,255,.03);display:flex;flex-direction:column;gap:6px}
.app .n{font-weight:700;font-size:1.05rem}
.app .m{color:#8f8ab0;font-size:.85rem}
.app .s{color:#a37bff;font-size:.8rem;margin-top:6px}
.app .btn{margin-top:14px;align-self:flex-start}
.verify{margin-top:60px;padding:36px;border-radius:22px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07)}
/* why reasons grid */
.reasons{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:900px){.reasons{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.reasons{grid-template-columns:1fr}}
.quote{margin-top:80px;padding:44px;border-left:3px solid #a37bff;background:rgba(163,123,255,.06);border-radius:0 22px 22px 0;font-size:1.15rem;font-style:italic;color:#dcd6f5}
.quote .who{display:block;margin-top:14px;font-style:normal;font-size:.9rem;color:#a37bff}
/* footer */
.site-footer{border-top:1px solid rgba(255,255,255,.07);padding:60px 0 30px;margin-top:60px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
@media(max-width:800px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:#8f8ab0;margin:0 0 14px}
.foot-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.foot-grid a{color:#c8c4e2;font-size:.9rem}
.foot-grid a:hover{color:#fff}
.copyright{border-top:1px solid rgba(255,255,255,.06);padding-top:24px;font-size:.85rem;color:#8f8ab0;text-align:center}