/* LetsVPN 仿官网设计系统（母版 letsvpn.world）·主色 #9257f9·渐变 pink->purple->blue */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#9257f9;--brand2:#3150ed;--brand3:#eb4eb1;
  --grad:linear-gradient(315deg,#eb4eb1 0%,#9257f9 50%,#3150ed 100%);
  --grad-soft:linear-gradient(180deg,#f3eefe 0%,#eef2ff 60%,#ffffff 100%);
  --ink:#171527;--muted:#5b6072;--line:#e9e7f2;--bg:#fff;--soft:#f6f5fb;
  --radius:16px;--shadow:0 10px 30px rgba(60,40,120,.10);
}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC",-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.68;-webkit-font-smoothing:antialiased}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
a{color:var(--brand);text-decoration:none}
a:hover{opacity:.86}
img{max-width:100%;height:auto;display:block}
h1{font-size:clamp(28px,4vw,46px);line-height:1.18;letter-spacing:-.01em;font-weight:800}
h2{font-size:clamp(21px,2.4vw,30px);line-height:1.3;font-weight:750;letter-spacing:-.01em}
h3{font-size:18px;font-weight:700}
p{color:#2c2a3c}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:999px;font-weight:700;font-size:15px;border:1.5px solid transparent;transition:transform .15s,box-shadow .15s;cursor:pointer}
.btn:hover{transform:translateY(-2px);opacity:1}
.btn.grad{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(146,87,249,.34)}
.btn.white{background:#fff;color:var(--brand2)}
.btn.ghost{background:#fff;color:var(--brand);border-color:#e2dbfb}
.btn.ghost2{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.5)}
.btn.big{padding:15px 38px;font-size:16px}

/* header */
.site-hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:32px;height:32px;border-radius:8px}
.logo-text{font-size:20px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{display:flex;gap:24px;margin-left:14px}
.nav a{color:#3b3a4d;font-weight:600;font-size:15px}
.nav a:hover{color:var(--brand)}
.bar .btn{margin-left:auto}

/* hero (home) */
.hero{position:relative;background:var(--grad);color:#fff;overflow:hidden;padding:64px 0 96px}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:60px;background:#fff;border-radius:50% 50% 0 0/100% 100% 0 0}
.herowrap{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;position:relative;z-index:2}
.hbadge{display:inline-block;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.4);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:18px}
.hero h1{color:#fff;margin-bottom:16px}
.hsub{color:rgba(255,255,255,.94);font-size:17px;max-width:34em;margin-bottom:26px}
.hcta{display:flex;gap:14px;flex-wrap:wrap}
.stats{display:flex;gap:26px;margin-top:30px}
.stat b{display:block;font-size:30px;font-weight:800;line-height:1}
.stat span{font-size:13px;color:rgba(255,255,255,.85)}
.heroimg img,.heroimg picture{filter:drop-shadow(0 24px 50px rgba(20,10,60,.35))}

/* phero (inner) */
.phero{background:var(--grad-soft);border-bottom:1px solid var(--line);padding:40px 0 46px}
.pherowrap{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.kicker{display:inline-block;background:#efe9fe;color:var(--brand);padding:5px 13px;border-radius:999px;font-size:13px;font-weight:700;margin-bottom:14px}
.phero h1{margin-bottom:14px}
.lede{color:#43415a;font-size:17px;max-width:36em}
.pcta{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}
.phimg img,.phimg picture{border-radius:var(--radius)}

/* breadcrumb */
.crumb{max-width:1140px;margin:0 auto;padding:14px 22px 0;font-size:13px;color:var(--muted)}
.crumb a{color:var(--muted)}.crumb a:hover{color:var(--brand)}
.crumb i{color:#c7c3d6;font-style:normal;margin:0 4px}

/* byline (EEAT 可见署名) */
.byline{max-width:880px;margin:6px auto 30px;padding:14px 0 0;border-top:1px dashed var(--line);font-size:13.5px;color:var(--muted);display:flex;flex-wrap:wrap;align-items:center;gap:7px}
.byline a[rel="author"]{color:var(--brand);font-weight:700}
.byline .byl{color:#8e89ab}
.byline i{color:#c7c3d6;font-style:normal}
.ftauthor a[rel="author"]{color:#dcd8ef;font-weight:700}

/* highlights */
.hls{max-width:1140px;margin:-34px auto 8px;padding:0 22px;position:relative;z-index:5;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.hl{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 16px;box-shadow:var(--shadow);text-align:center}
.hlic{display:inline-flex;width:46px;height:46px;align-items:center;justify-content:center;background:#f3eefe;border-radius:12px;margin-bottom:10px}
.hl h3{font-size:14.5px;font-weight:700;color:#28263a}

/* body article */
.body{padding:38px 0 12px;max-width:880px}
.body h2{margin:30px 0 8px}
.body .answer{font-size:16.5px;color:#211f33;font-weight:600;background:linear-gradient(90deg,#faf8ff,transparent);border-left:3px solid var(--brand);padding:7px 0 7px 14px;border-radius:0 8px 8px 0}
.body p{margin:8px 0;color:#3b3950}
.midimg{margin:22px 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);max-width:560px}

/* author card (about-editor) */
.authorcard{display:flex;gap:20px;align-items:center;max-width:880px;margin:24px auto;padding:22px;background:var(--soft);border-radius:var(--radius)}
.authorcard img{width:96px;height:96px;border-radius:50%;flex:0 0 auto;box-shadow:var(--shadow)}
.authorcard h2{font-size:20px;margin-bottom:6px}
.authorcard .answer{font-size:15.5px;color:#43415a;font-weight:500;border:0;background:none;padding:0}

/* trust */
.trust{display:flex;align-items:center;gap:18px;margin:18px auto;padding:18px 22px;background:var(--soft);border-radius:var(--radius)}
.trust img{width:64px;height:64px;flex:0 0 auto}
.trust p{color:#43415a;font-size:15px}

/* feature rows */
.feats{padding:30px 0}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center;padding:34px 0}
.frow.rev .ftext{order:2}
.fnum{font-size:13px;font-weight:800;color:var(--brand);letter-spacing:.08em}
.frow h2{margin:6px 0 10px}
.frow .answer{color:#46445c;font-size:16px;font-weight:500;border:0;padding:0;background:none}
.fimg img{border-radius:var(--radius)}

/* testimonials */
.testi{padding:26px 0 8px}
.testi h2{text-align:center;margin-bottom:24px}
.tgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tcard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.tcard .star{display:inline-block;margin:0 1px 8px 0}
.tcard blockquote{font-size:14.5px;color:#3b3950;line-height:1.7;margin:4px 0 14px}
.tcard figcaption{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.tcard figcaption img{width:40px;height:40px;border-radius:50%}

/* download cta band */
.dlcta{background:var(--grad-soft);margin-top:30px;padding:48px 0;text-align:center}
.dlcta h2{margin-bottom:10px}
.dlcta p{color:#46445c;max-width:36em;margin:0 auto 22px}

/* download platforms */
.plats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:34px 0}
.plat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.plat .hlic{margin-bottom:12px}
.plat .req{color:var(--muted);font-size:13px;margin:4px 0 8px}
.plat .btn{margin-top:14px}

/* tool */
.toolbox{background:var(--soft);border-radius:16px;padding:24px;margin-bottom:24px}
.widget{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:18px}
.widget label{font-weight:700}
.widget select{padding:10px 14px;border-radius:10px;border:1.5px solid #dcd6f3;font-size:15px;background:#fff}
.recoOut{display:block;flex-basis:100%;background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:10px;padding:12px 16px;font-weight:600;color:#2c2a3c}
.tblwrap{overflow-x:auto}
.dtable{width:100%;border-collapse:collapse;font-size:14.5px}
.dtable caption{text-align:left;font-weight:700;margin-bottom:10px;color:#28263a}
.dtable th,.dtable td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left}
.dtable thead th{background:#f3eefe;color:var(--brand2);font-weight:700}
.dtable tbody tr:hover{background:#faf8ff}

/* faq */
.faqs,.faqcat{padding:14px 0 30px;max-width:880px;margin:0 auto}
.faqs h2,.faqcat h2{margin-bottom:14px}
.faqlist details{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:#fff;overflow:hidden}
.faqlist summary{padding:15px 18px;font-weight:650;cursor:pointer;list-style:none;position:relative;color:#28263a}
.faqlist summary::-webkit-details-marker{display:none}
.faqlist summary::after{content:"+";position:absolute;right:18px;color:var(--brand);font-size:20px;font-weight:400}
.faqlist details[open] summary::after{content:"-"}
.faqlist .fa{padding:0 18px 16px;color:#43415a;font-size:15px}
.moref{margin-top:16px}.moref a{font-weight:700}

/* sources + related */
.sources{font-size:13px;color:var(--muted);margin:26px 0 8px;border-top:1px dashed var(--line);padding-top:14px}
.sources a{color:#7a6fb0}
.related{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:14px 0 6px}
.related strong{font-size:14px;color:#28263a;margin-right:4px}
.related a{background:#f3eefe;color:var(--brand);padding:7px 14px;border-radius:999px;font-size:13.5px;font-weight:600}

/* footer */
.site-ft{background:#1a1730;color:#cfcbe2;margin-top:40px;padding:40px 0 26px}
.site-ft .cols{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.ftbrand{max-width:330px}
.ftbrand strong{color:#fff;font-size:18px;margin-left:8px;vertical-align:middle}
.ftmark{vertical-align:middle}
.ftnote{color:#9c97b8;font-size:13px;margin-top:10px}
.site-ft .related{justify-content:flex-end}
.site-ft .related a{background:rgba(255,255,255,.08);color:#dcd8ef}
.site-ft .related strong{color:#fff}
.ftcopy{margin-top:24px;border-top:1px solid rgba(255,255,255,.1);padding-top:16px;color:#8e89ab;font-size:13px}

/* responsive */
@media(max-width:860px){
  .herowrap,.pherowrap,.frow,.frow.rev .ftext{grid-template-columns:1fr;order:0}
  .heroimg,.phimg{order:-1}
  .hls{grid-template-columns:repeat(2,1fr)}
  .tgrid,.plats{grid-template-columns:1fr}
  .nav{display:none}
  .stats{flex-wrap:wrap;gap:18px}
}