:root{
  --bg:#120a1e;
  --bg-2:#1a1028;
  --card:#241636;
  --card-2:#2c1c44;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text:#ece9f6;
  --muted:#a79fc2;
  --accent:#a855f7;
  --accent-2:#10b981;
  --blue:#6366f1;
  --radius:16px;
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;scroll-padding-top:86px;}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;transition:.22s ease;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,#c084fc,#9333ea);color:#fff;
  box-shadow:0 10px 26px rgba(192,132,252,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(192,132,252,.4);}
.btn-ghost{border-color:var(--line-strong);color:var(--text);background:rgba(255,255,255,.03);}
.btn-ghost:hover{border-color:var(--accent);color:#d8b4fe;background:rgba(168,85,247,.08);}
.btn-green{background:linear-gradient(135deg,#34d399,#059669);color:#022c22;
  box-shadow:0 10px 26px rgba(16,185,129,.24);}
.btn-green:hover{transform:translateY(-2px);}
.btn-sm{padding:9px 18px;font-size:13.5px;}
.btn-block{width:100%;}
.btn:focus-visible,a:focus-visible,summary:focus-visible{
  outline:2px solid #d8b4fe;outline-offset:3px;
}

/* ============ 合规提示条 ============ */
.notice{
  background:linear-gradient(90deg,rgba(168,85,247,.18),rgba(168,85,247,.06));
  border-bottom:1px solid rgba(168,85,247,.28);
  font-size:13px;color:#ede9fe;
}
.notice .wrap{display:flex;align-items:center;gap:12px;padding:10px 20px;flex-wrap:wrap;}
.notice strong{color:#d8b4fe;}
.notice a{margin-left:auto;color:#d8b4fe;font-weight:600;border-bottom:1px dashed rgba(216,180,254,.6);}

/* ============ 导航 ============ */
header.nav{
  position:sticky;top:0;z-index:60;
  background:rgba(18,10,30,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:22px;height:66px;}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:.3px;}
.logo-mark{
  width:32px;height:32px;border-radius:10px;flex:none;
  background:linear-gradient(135deg,#c084fc,#7e22ce);
  display:grid;place-items:center;font-size:16px;
  box-shadow:0 6px 16px rgba(192,132,252,.35);
}
.nav-links{display:flex;align-items:center;gap:20px;margin-left:12px;overflow-x:auto;scrollbar-width:none;}
.nav-links::-webkit-scrollbar{display:none;}
.nav-links a{font-size:14.5px;color:var(--muted);white-space:nowrap;padding:6px 2px;transition:.2s;}
.nav-links a:hover{color:#fff;}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;flex:none;}
.lang{font-size:13.5px;color:var(--muted);border:1px solid var(--line-strong);
  border-radius:999px;padding:7px 14px;transition:.2s;}
.lang:hover{color:#fff;border-color:var(--accent);}
.login{font-size:14px;color:var(--muted);}
.login:hover{color:#fff;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:78px 0 66px;
  background:
    radial-gradient(900px 480px at 78% -8%,rgba(168,85,247,.20),transparent 62%),
    radial-gradient(760px 460px at 8% 16%,rgba(99,102,241,.20),transparent 60%),
    var(--bg);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 30%,#000 30%,transparent 78%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#ede9fe;
  background:rgba(168,85,247,.12);border:1px solid rgba(168,85,247,.32);
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--accent-2);
  box-shadow:0 0 0 4px rgba(16,185,129,.18);}
h1{font-size:44px;line-height:1.25;letter-spacing:-.5px;font-weight:800;}
h1 .hl{background:linear-gradient(120deg,#d8b4fe,#c084fc);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{margin-top:18px;font-size:16px;color:var(--muted);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-metrics{display:flex;flex-wrap:wrap;gap:34px;margin-top:40px;padding-top:26px;border-top:1px solid var(--line);}
.metric b{display:block;font-size:23px;font-weight:800;color:#fff;}
.metric span{font-size:13px;color:var(--muted);}

/* Hero 视觉卡 */
.hero-visual{position:relative;}
.app-card{
  background:linear-gradient(180deg,var(--card-2),#2a1838);
  border:1px solid var(--line-strong);border-radius:22px;padding:22px;
  box-shadow:0 34px 70px rgba(0,0,0,.55);
}
.app-top{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.app-top .dots{display:flex;gap:6px;}
.app-top .dots i{width:9px;height:9px;border-radius:50%;background:#3a2a52;display:block;}
.app-top .title{font-size:12.5px;color:var(--muted);margin-left:auto;}
.conn{
  display:flex;align-items:center;gap:14px;padding:16px;border-radius:14px;
  background:rgba(16,185,129,.09);border:1px solid rgba(16,185,129,.28);margin-bottom:16px;
}
.conn .ring{
  width:44px;height:44px;border-radius:50%;flex:none;
  border:3px solid rgba(16,185,129,.35);border-top-color:var(--accent-2);
  display:grid;place-items:center;font-size:15px;
}
.conn b{display:block;font-size:14px;color:#6ee7b7;}
.conn span{font-size:12.5px;color:var(--muted);}
.line-row{display:flex;justify-content:space-between;font-size:13px;padding:11px 0;border-bottom:1px dashed var(--line);}
.line-row:last-of-type{border-bottom:none;}
.line-row .k{color:var(--muted);}
.line-row .v{color:#fff;font-weight:600;}
.pill{font-size:11.5px;padding:2px 9px;border-radius:999px;background:rgba(16,185,129,.16);color:#6ee7b7;}
.pill.warn{background:rgba(168,85,247,.16);color:#d8b4fe;}

/* ============ 通用区块 ============ */
section{padding:76px 0;}
.sec-alt{background:var(--bg-2);}
.sec-head{text-align:center;max-width:760px;margin:0 auto 46px;}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:2px;text-transform:uppercase;
  color:var(--accent);font-weight:700;margin-bottom:12px;
}
h2{font-size:32px;font-weight:800;letter-spacing:-.3px;}
.sec-desc{margin-top:14px;color:var(--muted);font-size:15.5px;}

/* 信任条 */
.trust-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.015);}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding:26px 0;}
.trust-item{display:flex;align-items:center;gap:12px;justify-content:center;font-size:14px;color:var(--muted);}
.trust-item .ico{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;flex:none;
  background:rgba(168,85,247,.12);border:1px solid rgba(168,85,247,.26);color:#d8b4fe;font-size:15px;
}

/* 卡片网格 */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;transition:.25s ease;height:100%;
}
.card:hover{transform:translateY(-4px);border-color:rgba(168,85,247,.42);
  box-shadow:0 20px 44px rgba(0,0,0,.45);}
.card .ico-lg{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;font-size:20px;
  background:linear-gradient(135deg,rgba(168,85,247,.2),rgba(99,102,241,.16));
  border:1px solid var(--line-strong);margin-bottom:16px;
}
.card h3{font-size:17px;margin-bottom:9px;font-weight:700;}
.card p{font-size:14px;color:var(--muted);}
.card .more{display:inline-block;margin-top:14px;font-size:13.5px;color:#d8b4fe;font-weight:600;}
.card .more:hover{text-decoration:underline;}

/* 场景 */
.scenario{position:relative;overflow:hidden;}
.scenario .tagline{font-size:12px;color:var(--accent-2);font-weight:700;letter-spacing:1px;}
.scenario h3{margin-top:6px;}

/* 节点 */
.node-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.node{
  background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;
  transition:.22s;
}
.node:hover{border-color:rgba(99,102,241,.45);background:var(--card-2);}
.node-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;}
.node-top b{font-size:15px;}
.node small{color:var(--muted);font-size:12.5px;display:block;}
.node .status{margin-top:10px;font-size:12.5px;color:var(--muted);}
.node .status b{color:#fff;}
.node-note{margin-top:22px;font-size:12.5px;color:var(--muted);text-align:center;}

/* 设备 */
.device{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:22px;text-align:center;transition:.22s;
}
.device:hover{transform:translateY(-4px);border-color:rgba(168,85,247,.42);}
.device .ico-lg{margin:0 auto 14px;}
.device h3{font-size:16px;margin-bottom:6px;}
.device p{font-size:13px;color:var(--muted);margin-bottom:16px;}

/* 价格 */
.price-card{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:20px;padding:30px 26px;display:flex;flex-direction:column;transition:.25s;
}
.price-card:hover{transform:translateY(-5px);border-color:var(--line-strong);}
.price-card.recommend{
  background:linear-gradient(180deg,rgba(168,85,247,.14),var(--card) 42%);
  border-color:rgba(168,85,247,.5);
  box-shadow:0 26px 60px rgba(192,132,252,.16);
}
.ribbon{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,#c084fc,#9333ea);color:#fff;font-size:12px;font-weight:700;
  padding:5px 16px;border-radius:999px;white-space:nowrap;
}
.price-card h3{font-size:17px;margin-bottom:6px;}
.price-card .plan-desc{font-size:13px;color:var(--muted);min-height:40px;}
.price{margin:14px 0 4px;display:flex;align-items:baseline;gap:6px;}
.price .cur{font-size:17px;color:var(--muted);}
.price .num{font-size:38px;font-weight:800;letter-spacing:-1px;}
.price .per{font-size:13.5px;color:var(--muted);}
.price-sub{font-size:12.5px;color:var(--muted);margin-bottom:18px;}
.feat{list-style:none;margin:6px 0 22px;flex:1;}
.feat li{font-size:13.5px;color:#d4cde8;padding:7px 0 7px 24px;position:relative;}
.feat li::before{
  content:"✓";position:absolute;left:0;top:7px;color:var(--accent-2);font-weight:700;
}
.price-small{font-size:11.5px;color:var(--muted);margin-top:14px;line-height:1.6;}

/* 安全 */
.secure-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;}
.secure-list{list-style:none;margin-top:24px;}
.secure-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line);}
.secure-list li:last-child{border-bottom:none;}
.secure-list .ico{
  width:34px;height:34px;border-radius:9px;flex:none;display:grid;place-items:center;
  background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.28);color:#6ee7b7;font-size:14px;
}
.secure-list b{display:block;font-size:14.5px;margin-bottom:2px;}
.secure-list span{font-size:13.5px;color:var(--muted);}
.secure-box{
  background:linear-gradient(160deg,var(--card-2),#1c1030);
  border:1px solid var(--line-strong);border-radius:20px;padding:28px;
}
.secure-box h3{font-size:16px;margin-bottom:16px;}
.bar{margin-bottom:14px;}
.bar .lb{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-bottom:6px;}
.bar .track{height:7px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;}
.bar .fill{height:100%;border-radius:99px;background:linear-gradient(90deg,#10b981,#6366f1);}

/* 评价 */
.review{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;}
.stars{color:#d8b4fe;font-size:14px;letter-spacing:2px;margin-bottom:12px;}
.review p{font-size:14px;color:#d9d3ec;}
.reviewer{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);}
.avatar{
  width:38px;height:38px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:linear-gradient(135deg,#6366f1,#10b981);color:#fff;font-size:14px;font-weight:700;
}
.reviewer b{display:block;font-size:13.5px;}
.reviewer span{font-size:12.5px;color:var(--muted);}
.review-note{text-align:center;font-size:12.5px;color:var(--muted);margin-top:22px;}

/* FAQ */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  margin-bottom:14px;overflow:hidden;transition:.2s;
}
.faq-item[open]{border-color:rgba(168,85,247,.42);background:var(--card-2);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 54px 20px 22px;position:relative;
  font-size:15.5px;font-weight:600;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:22px;color:var(--accent);font-weight:400;line-height:1;
}
.faq-item[open] summary::after{content:"–";}
.tag{
  font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:999px;
  background:rgba(168,85,247,.14);color:#d8b4fe;border:1px solid rgba(168,85,247,.3);
  white-space:nowrap;
}
.faq-body{padding:0 22px 22px;border-top:1px solid var(--line);}
.faq-body ol{margin:18px 0 0 0;padding-left:0;list-style:none;counter-reset:step;}
.faq-body ol li{
  counter-increment:step;position:relative;padding:10px 0 10px 42px;
  font-size:14px;color:#d4cde8;border-bottom:1px dashed rgba(255,255,255,.06);
}
.faq-body ol li:last-child{border-bottom:none;}
.faq-body ol li::before{
  content:counter(step);position:absolute;left:0;top:11px;
  width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:rgba(168,85,247,.16);border:1px solid rgba(168,85,247,.36);
  color:#d8b4fe;font-size:12.5px;font-weight:700;
}

/* 客服 CTA */
.support{
  text-align:center;border-radius:24px;padding:56px 28px;
  background:
    radial-gradient(600px 260px at 50% 0%,rgba(168,85,247,.22),transparent 70%),
    linear-gradient(180deg,var(--card-2),#1c1030);
  border:1px solid var(--line-strong);
}
.support h2{font-size:28px;}
.support p{color:var(--muted);margin:14px auto 26px;max-width:560px;font-size:15px;}
.support-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* Footer */
footer{background:#0d0716;border-top:1px solid var(--line);padding:56px 0 30px;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;}
.foot-brand p{font-size:13.5px;color:var(--muted);margin-top:14px;max-width:320px;}
.foot-col h4{font-size:13.5px;margin-bottom:14px;color:#fff;letter-spacing:.4px;}
.foot-col a{display:block;font-size:13.5px;color:var(--muted);padding:6px 0;transition:.2s;}
.foot-col a:hover{color:#d8b4fe;}
.foot-bottom{
  margin-top:38px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12.5px;color:#8a83a8;
}
.foot-bottom .legal-links{display:flex;flex-wrap:wrap;gap:16px;}
.foot-bottom .legal-links a:hover{color:#d8b4fe;}
.disclaimer{
  margin-top:18px;font-size:12px;color:#7d76a0;line-height:1.8;
  background:rgba(255,255,255,.02);border:1px solid var(--line);
  border-radius:12px;padding:14px 16px;
}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual{max-width:520px;}
  h1{font-size:36px;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .node-grid{grid-template-columns:repeat(3,1fr);}
  .grid-3{grid-template-columns:1fr;}
  .secure-grid{grid-template-columns:1fr;gap:32px;}
  .foot-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:860px){
  .nav-links{display:none;}
  .nav-inner{height:62px;gap:12px;}
  .login{display:none;}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:18px;}
  .node-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:640px){
  section{padding:56px 0;}
  .hero{padding:52px 0 46px;}
  h1{font-size:29px;line-height:1.32;}
  h2{font-size:24px;}
  .hero-sub{font-size:14.5px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-metrics{gap:22px;}
  .metric b{font-size:20px;}
  .grid-4{grid-template-columns:1fr;}
  .node-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;}
  .notice .wrap{padding:10px 16px;}
  .notice a{margin-left:0;}
  .faq-item summary{font-size:14.5px;padding:16px 46px 16px 16px;}
  .faq-body{padding:0 16px 18px;}
  .price-card{padding:26px 22px;}
  .foot-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}