:root{
  --bg:#0a0e1a; --card:rgba(255,255,255,.045); --card-b:rgba(255,255,255,.09);
  --txt:#eef2ff; --sub:#9aa5c4;
  --brand1:#6366f1; --brand2:#a855f7; --brand3:#22d3ee; --gold:#fbbf24; --r:18px;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--txt);line-height:1.65;overflow-x:hidden;padding-bottom:78px}
body::before{content:"";position:fixed;inset:0;z-index:-2;
  background:radial-gradient(900px 500px at 15% -5%,rgba(99,102,241,.28),transparent 60%),
             radial-gradient(700px 450px at 90% 8%,rgba(168,85,247,.24),transparent 60%),
             radial-gradient(600px 400px at 50% 100%,rgba(34,211,238,.14),transparent 60%)}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(ellipse at 50% 30%,#000 40%,transparent 78%)}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}

/* 公告 */
.notice{background:linear-gradient(90deg,rgba(99,102,241,.22),rgba(168,85,247,.18));
  border-bottom:1px solid var(--card-b);font-size:12.5px;text-align:center;padding:8px 16px;color:#c7d2fe}

/* nav */
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(10,14,26,.72);border-bottom:1px solid var(--card-b)}
.nav-in{max-width:1080px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:17px}
.logo i{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-style:normal;font-size:15px;
  background:linear-gradient(135deg,var(--brand1),var(--brand2));box-shadow:0 6px 18px rgba(99,102,241,.45)}
.nav-links{display:flex;gap:22px;font-size:14px}
.nav-links a{color:var(--sub);text-decoration:none;transition:.2s}
.nav-links a:hover{color:#fff}
.nav-btn{font-size:13px;padding:8px 16px;border-radius:99px;border:0;cursor:pointer;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--brand1),var(--brand2));box-shadow:0 6px 16px rgba(99,102,241,.4)}
@media(max-width:720px){.nav-links{display:none}}

/* hero */
header{padding:42px 0 26px;text-align:center;position:relative}
@media(max-width:560px){header{padding:30px 0 20px}}
.pill{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:#c7d2fe;padding:6px 14px;
  border-radius:99px;border:1px solid rgba(129,140,248,.35);background:rgba(99,102,241,.12);margin-bottom:20px}
.pill b{width:6px;height:6px;border-radius:50%;background:var(--brand3);box-shadow:0 0 8px var(--brand3);animation:blink 1.6s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}
h1{font-size:clamp(28px,7vw,50px);line-height:1.22;font-weight:900;letter-spacing:-.5px;margin-bottom:16px}
h1 span{background:linear-gradient(100deg,var(--brand3),var(--brand1) 45%,var(--brand2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--sub);font-size:15.5px;max-width:560px;margin:0 auto 26px}
@media(max-width:560px){.lead{margin-bottom:20px}}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}
@media(max-width:560px){.cta{margin-bottom:22px}}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:99px;font-weight:800;
  font-size:15px;text-decoration:none;border:0;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-main{color:#fff;background:linear-gradient(135deg,var(--brand1),var(--brand2));
  box-shadow:0 10px 30px rgba(99,102,241,.42),inset 0 1px 0 rgba(255,255,255,.25)}
.btn-ghost{color:var(--txt);background:var(--card);border:1px solid var(--card-b);backdrop-filter:blur(8px)}
.btn:hover{transform:translateY(-2px)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:720px;margin:0 auto;padding:18px;
  border-radius:var(--r);background:var(--card);border:1px solid var(--card-b);backdrop-filter:blur(10px)}
.stat b{display:block;font-size:22px;font-weight:900;background:linear-gradient(135deg,#fff,#a5b4fc);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:12px;color:var(--sub)}
@media(max-width:560px){.stats{grid-template-columns:repeat(2,1fr)}}

section{padding:52px 0 8px}
.sec-head{text-align:center;margin-bottom:30px}
.sec-head h2{font-size:clamp(21px,4.6vw,30px);font-weight:900;margin-bottom:8px}
.sec-head p{color:var(--sub);font-size:14px}
.sec-tag{display:inline-block;font-size:11.5px;letter-spacing:2px;color:var(--brand3);
  text-transform:uppercase;margin-bottom:10px;font-weight:700}

/* 分类一排 */
.filter{margin-bottom:26px}
.tabs-1{padding:5px;gap:4px;border-radius:99px;background:var(--card);border:1px solid var(--card-b);
  backdrop-filter:blur(10px);width:100%;display:flex;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:0 auto 14px}
.tabs-1::-webkit-scrollbar{display:none}
.tab1{flex:1 1 0;min-width:0;display:flex;align-items:center;justify-content:center;gap:2px;border:0;background:none;
  color:var(--sub);font-family:inherit;font-size:14px;font-weight:700;padding:10px 8px;border-radius:99px;
  cursor:pointer;transition:.25s;white-space:nowrap}
.tab1:hover{color:#fff}
.tab1.on{color:#fff;background:linear-gradient(135deg,var(--brand1),var(--brand2));box-shadow:0 6px 16px rgba(99,102,241,.42)}
.tab1 small{font-size:11px;font-weight:800;margin-left:5px;padding:1px 6px;border-radius:99px;
  background:rgba(255,255,255,.1);color:var(--sub)}
.tab1.on small{background:rgba(255,255,255,.24);color:#fff}
@media(max-width:420px){.tab1{font-size:13px;padding:10px 4px}.tab1 small{display:none}}

/* 套餐卡 */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.plan.off{display:none}
.plan.pop{animation:pop .42s cubic-bezier(.2,.8,.2,1) both}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.97)}to{opacity:1;transform:none}}
.empty{grid-column:1/-1;text-align:center;padding:46px 20px;border-radius:var(--r);
  background:var(--card);border:1px dashed var(--card-b);color:var(--sub);font-size:13.5px}
.plan{position:relative;padding:18px 16px;border-radius:var(--r);
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));
  border:1px solid var(--card-b);backdrop-filter:blur(10px);
  transition:transform .28s cubic-bezier(.2,.8,.2,1),box-shadow .28s,border-color .28s;overflow:hidden}
.plan::before{content:"";position:absolute;inset:0;border-radius:var(--r);padding:1px;
  background:linear-gradient(135deg,rgba(99,102,241,.6),transparent 45%,rgba(34,211,238,.5));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.28s;pointer-events:none}
.plan:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(0,0,0,.45)}
.plan:hover::before{opacity:1}
.plan.hot{background:linear-gradient(180deg,rgba(168,85,247,.14),rgba(99,102,241,.05));border-color:rgba(168,85,247,.45)}
.plan.hot::before{opacity:.85}
.badge{display:inline-block;margin-left:6px;vertical-align:middle;font-size:10px;font-weight:800;
  padding:2px 7px;border-radius:99px;color:#3b2500;background:linear-gradient(135deg,var(--gold),#f59e0b);letter-spacing:.5px}
.phead{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:10px}
.ptitle{flex:1;min-width:0}
.pname{font-size:15px;font-weight:800;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pdesc{font-size:12px;color:var(--sub);line-height:1.45}
.price{flex:none;display:flex;align-items:baseline;gap:3px}
.price i{font-style:normal;font-size:15px;color:var(--gold);font-weight:700}
.price b{font-size:28px;font-weight:900;letter-spacing:-1px;line-height:1.1;
  background:linear-gradient(135deg,#fff,#c7d2fe);-webkit-background-clip:text;background-clip:text;color:transparent}
.price s{font-size:12px;color:#6b7793}
@media(max-width:360px){.phead{flex-wrap:wrap}.price{width:100%;text-align:left}}
.plan ul{list-style:none;margin-bottom:12px;display:grid;gap:5px}
.plan li{font-size:12.5px;color:#cbd5e1;display:flex;gap:7px;align-items:flex-start;line-height:1.4}
.plan li::before{content:"✓";color:var(--brand3);font-weight:900;flex:none}
.buy{width:100%;padding:10px;border-radius:11px;border:0;cursor:pointer;font-size:13.5px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,var(--brand1),var(--brand2));transition:.2s}
.plan.hot .buy{background:linear-gradient(135deg,#f59e0b,var(--gold));color:#3b2500}
.buy:hover{filter:brightness(1.1);transform:translateY(-1px)}
.pmeta{display:flex;justify-content:space-between;font-size:11.5px;color:#6b7793;margin-top:9px;padding-top:9px;
  border-top:1px dashed rgba(255,255,255,.1)}

/* 功能 / 保障 */
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.feat{padding:22px;border-radius:var(--r);background:var(--card);border:1px solid var(--card-b);
  backdrop-filter:blur(10px);transition:.25s}
.feat:hover{transform:translateY(-4px);background:rgba(255,255,255,.075)}
.feat .ico{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:20px;margin-bottom:12px;
  background:linear-gradient(135deg,rgba(99,102,241,.28),rgba(34,211,238,.18));border:1px solid rgba(129,140,248,.3)}
.feat h3{font-size:15px;margin-bottom:6px;font-weight:800}
.feat p{font-size:13px;color:var(--sub)}
.guar{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;padding:24px;border-radius:var(--r);
  background:linear-gradient(135deg,rgba(99,102,241,.13),rgba(168,85,247,.08));border:1px solid rgba(129,140,248,.28)}
.guar div{text-align:center}
.guar b{display:block;font-size:13.5px;font-weight:800;margin-top:6px}
.guar span{font-size:12px;color:var(--sub)}
.guar em{font-style:normal;font-size:22px}

/* FAQ */
.faq{max-width:720px;margin:0 auto;display:grid;gap:10px}
.q{background:var(--card);border:1px solid var(--card-b);border-radius:14px;overflow:hidden;backdrop-filter:blur(8px)}
.q button{width:100%;padding:16px 18px;background:none;border:0;color:var(--txt);font-size:14.5px;font-weight:700;
  display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer;text-align:left;font-family:inherit}
.q button span{transition:transform .3s;color:var(--brand3);font-size:18px}
.q.open button span{transform:rotate(45deg)}
.q div{max-height:0;overflow:hidden;transition:max-height .35s ease}
.q.open div{max-height:400px}
.q p{padding:0 18px 16px;font-size:13.5px;color:var(--sub)}

footer{margin-top:52px;padding:30px 0 20px;border-top:1px solid var(--card-b);text-align:center;color:var(--sub);font-size:12.5px}
footer .fl{display:flex;gap:18px;justify-content:center;margin-bottom:12px;flex-wrap:wrap}
footer a{color:var(--sub);text-decoration:none}
footer a:hover{color:#fff}

/* 悬浮客服 */
.bar{position:fixed;left:12px;right:12px;bottom:12px;z-index:60;display:flex;align-items:center;gap:12px;
  padding:10px 12px 10px 16px;border-radius:99px;background:rgba(15,21,38,.9);backdrop-filter:blur(18px);
  border:1px solid var(--card-b);box-shadow:0 12px 34px rgba(0,0,0,.5)}
.bar .bt{flex:1;min-width:0}
.bar .bt b{display:block;font-size:13.5px;font-weight:800}
.bar .bt span{font-size:11.5px;color:var(--sub)}
.bar .bb{flex:none;padding:11px 22px;border-radius:99px;border:0;font-weight:800;font-size:14px;color:#fff;cursor:pointer;
  background:linear-gradient(135deg,var(--brand1),var(--brand2));box-shadow:0 6px 18px rgba(99,102,241,.45)}

/* 弹窗 */
.mask{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:20px;
  background:rgba(4,7,16,.72);backdrop-filter:blur(6px);opacity:0;transition:opacity .25s}
.mask.show{display:flex;opacity:1}
.modal{width:100%;max-width:400px;border-radius:20px;padding:24px 22px;transform:translateY(16px) scale(.96);
  transition:transform .28s cubic-bezier(.2,.8,.2,1);
  background:linear-gradient(180deg,#161d33,#111726);border:1px solid var(--card-b);box-shadow:0 24px 60px rgba(0,0,0,.6)}
.mask.show .modal{transform:none}
.modal h3{font-size:17px;font-weight:900;margin-bottom:10px}
.modal .mtext{font-size:13.5px;color:var(--sub);white-space:pre-wrap;line-height:1.7;margin-bottom:20px;
  max-height:44vh;overflow-y:auto}
.modal .mbtns{display:flex;gap:10px}
.modal .mbtns button{flex:1;padding:12px;border-radius:12px;border:0;font-size:14px;font-weight:800;cursor:pointer;font-family:inherit}
.mok{color:#fff;background:linear-gradient(135deg,var(--brand1),var(--brand2))}
.mcancel{color:var(--txt);background:rgba(255,255,255,.07);border:1px solid var(--card-b)}
.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%) translateY(10px);z-index:120;opacity:0;
  pointer-events:none;transition:.25s;background:rgba(20,26,44,.95);border:1px solid var(--card-b);
  color:#fff;font-size:13px;padding:10px 18px;border-radius:99px}
.toast.show{opacity:1;transform:translateX(-50%)}