*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:92px;background:#fffcf9}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:#171321;line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(760px 520px at 6% -8%, rgba(255,46,99,.16), transparent 62%),
    radial-gradient(700px 520px at 98% 4%, rgba(124,58,237,.16), transparent 64%),
    radial-gradient(820px 640px at 50% 106%, rgba(255,138,0,.13), transparent 66%);
}
img{display:block;border:0}
a{color:inherit}
h1,h2,h3{letter-spacing:-.4px;line-height:1.28}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;
  text-decoration:none;cursor:pointer;border:2px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
}
.btn-primary{
  color:#fff;background:linear-gradient(120deg,#ff2e63 0%,#f4408f 46%,#7c3aed 100%);
  box-shadow:0 14px 30px -14px rgba(255,46,99,.75);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 20px 38px -16px rgba(124,58,237,.8)}
.btn-line{color:#2b1140;background:#fff;border-color:rgba(124,58,237,.35)}
.btn-line:hover{background:#fff1f6;border-color:#ff2e63;transform:translateY(-3px)}
.btn:active{transform:translateY(0) scale(.985)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,252,249,.9);backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(23,19,33,.08);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.ai-page-logo{max-height:36px;width:auto}
.brand-name{font-size:18px;font-weight:900;letter-spacing:1px;color:#171321;white-space:nowrap}
.site-nav{display:flex;align-items:center;min-width:0}
.nav-links{display:flex;align-items:center;gap:0;list-style:none;flex-wrap:nowrap}
.nav-links a{
  display:block;padding:9px;font-size:13.5px;font-weight:600;color:#3b3448;
  text-decoration:none;white-space:nowrap;border-radius:9px;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:#d81b60;background:rgba(255,46,99,.09)}
.header-cta{padding:10px 20px;font-size:14px;flex:none}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:12px;border:1px solid rgba(23,19,33,.14);
  background:#fff;cursor:pointer;
}
.nav-toggle span{display:block;width:20px;height:2px;background:#2b1140;margin:0 auto;border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{padding:52px 0 20px}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:40px;align-items:start}
.pill{
  display:inline-flex;align-items:center;padding:6px 15px;border-radius:999px;
  background:rgba(255,46,99,.1);color:#d81b60;font-size:13px;font-weight:800;letter-spacing:.04em;
}
.hero h1{font-size:clamp(28px,4.2vw,46px);margin:16px 0 14px;font-weight:900}
.hero-lead{color:#4a4358;font-size:16px;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin-top:26px}
.hero-tags li{
  padding:6px 14px;border-radius:999px;background:#fff;border:1px solid rgba(23,19,33,.1);
  font-size:13px;font-weight:600;color:#4a4358;
}
.hero-panel{
  position:relative;overflow:hidden;background:#fff;border-radius:26px;padding:24px;
  border:1px solid rgba(124,58,237,.18);
  box-shadow:0 30px 64px -34px rgba(124,58,237,.6);
}
.hero-panel::before{
  content:"";position:absolute;top:-70px;right:-70px;width:200px;height:200px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,46,99,.22),transparent 68%);
}
.panel-head{display:flex;align-items:center;gap:9px;font-weight:800;font-size:15px;color:#2b1140;position:relative}
.panel-dot{width:9px;height:9px;border-radius:50%;background:#12d6a0;box-shadow:0 0 0 4px rgba(18,214,160,.18);flex:none}
.panel-desc{font-size:13.5px;color:#6b6379;margin-top:10px;position:relative}
.chip-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;position:relative}
.chip{
  display:inline-flex;align-items:center;padding:6px 12px;border-radius:999px;
  font-size:12.5px;font-weight:700;color:#5a2a86;background:#f5eeff;border:1px solid rgba(124,58,237,.16);
}
.chip.alt{color:#b3184b;background:#fff0f4;border-color:rgba(255,46,99,.2)}
.chip.mint{color:#0a7d5f;background:#eafaf4;border-color:rgba(18,214,160,.3)}
.panel-foot{
  margin-top:20px;padding-top:16px;border-top:1px dashed rgba(124,58,237,.24);
  font-size:13px;color:#4a4358;position:relative;
}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px}
.metric{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:18px;padding:18px 20px;
  box-shadow:0 14px 32px -26px rgba(43,17,64,.7);
  transition:transform .25s ease,box-shadow .25s ease;
}
.metric:hover{transform:translateY(-4px);box-shadow:0 22px 40px -26px rgba(124,58,237,.7)}
.metric strong{display:block;font-size:26px;font-weight:900;color:#2b1140;letter-spacing:-.5px}
.metric span{display:block;font-size:13px;color:#6b6379;margin-top:2px}

/* ---------- generic section ---------- */
.section{padding:54px 0}
.sec-head{max-width:760px;margin-bottom:30px}
.eyebrow{
  display:inline-flex;align-items:center;padding:5px 14px;border-radius:999px;
  background:rgba(124,58,237,.1);color:#6d28d9;font-size:13px;font-weight:800;letter-spacing:.06em;
}
.sec-head h2{font-size:clamp(23px,3vw,32px);font-weight:900;margin:14px 0 10px;color:#171321}
.sec-head p{color:#4a4358;font-size:15px}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:start}
.about-text p{color:#4a4358;font-size:15.5px;margin-bottom:14px}
.about-text strong{color:#2b1140}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.about-card{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:16px;padding:16px 16px 15px;
  border-top:3px solid transparent;
  border-image:linear-gradient(120deg,#ff2e63,#7c3aed) 1;
  transition:transform .25s ease,box-shadow .25s ease;
}
.about-card:hover{transform:translateY(-3px);box-shadow:0 18px 34px -24px rgba(124,58,237,.8)}
.about-card h3{font-size:15px;font-weight:800;color:#2b1140;margin-bottom:6px}
.about-card p{font-size:13px;color:#6b6379;line-height:1.6}

/* ---------- services ---------- */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.service-card{
  position:relative;background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:20px;padding:22px 20px;
  overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.service-card::after{
  content:"";position:absolute;left:20px;top:0;width:44px;height:3px;border-radius:0 0 4px 4px;
  background:linear-gradient(90deg,#ff2e63,#7c3aed);
}
.service-card:hover{transform:translateY(-5px);border-color:rgba(255,46,99,.3);box-shadow:0 24px 44px -28px rgba(255,46,99,.85)}
.service-card h3{font-size:17px;font-weight:900;color:#2b1140;margin:8px 0 8px}
.service-card p{font-size:13.5px;color:#5a5369;line-height:1.65}
.model-block{margin-top:34px;background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:22px;padding:24px}
.model-block h3{font-size:17px;font-weight:900;color:#2b1140;margin-bottom:6px}
.model-block p{font-size:14px;color:#6b6379;margin-bottom:16px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px}
.tag{
  padding:6px 13px;border-radius:10px;font-size:13px;font-weight:600;color:#3b3448;
  background:#faf6ff;border:1px solid rgba(124,58,237,.16);transition:.2s;
}
.tag:hover{background:#fff0f5;border-color:rgba(255,46,99,.35);color:#b3184b;transform:translateY(-2px)}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.flow-item{
  background:linear-gradient(180deg,#fff 0%,#fffaf7 100%);
  border:1px solid rgba(23,19,33,.08);border-radius:20px;padding:22px 20px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.flow-item:hover{transform:translateY(-4px);box-shadow:0 22px 40px -28px rgba(43,17,64,.9)}
.flow-no{display:inline-block;font-size:22px;font-weight:900;color:#ffb3c8;letter-spacing:1px}
.flow-item h3{font-size:16px;font-weight:900;color:#2b1140;margin:8px 0 8px}
.flow-item p{font-size:13.5px;color:#5a5369}

/* ---------- industry ---------- */
.industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.industry-card{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:20px;padding:24px;
  display:flex;flex-direction:column;gap:8px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.industry-card:hover{transform:translateY(-4px);box-shadow:0 24px 44px -30px rgba(124,58,237,.9)}
.industry-card h3{font-size:17px;font-weight:900;color:#2b1140}
.industry-card p{font-size:13.5px;color:#5a5369}
.industry-card span{font-size:12.5px;font-weight:700;color:#b3184b;background:#fff0f4;border-radius:8px;padding:4px 10px;align-self:flex-start}

/* ---------- network ---------- */
.network{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.net-item{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:16px;padding:18px 14px;text-align:center;
  transition:transform .25s ease,border-color .25s ease;
}
.net-item:hover{transform:translateY(-3px);border-color:rgba(255,46,99,.35)}
.net-item h3{font-size:15px;font-weight:800;color:#2b1140}
.net-item p{font-size:12.5px;color:#6b6379;margin-top:4px}

/* ---------- process ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.tl-item{background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:18px;padding:20px 18px;position:relative}
.tl-item::before{
  content:"";position:absolute;top:0;left:18px;width:30px;height:3px;border-radius:0 0 4px 4px;
  background:linear-gradient(90deg,#7c3aed,#ff8a00);
}
.tl-item h3{font-size:15px;font-weight:900;color:#2b1140;margin:6px 0 6px}
.tl-item p{font-size:13px;color:#5a5369}
.tl-num{font-size:12px;font-weight:800;color:#7c3aed;letter-spacing:.14em}

/* ---------- cases ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.case-card{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:20px;padding:14px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.case-card:hover{transform:translateY(-4px);box-shadow:0 26px 46px -30px rgba(124,58,237,.9)}
.case-media{border-radius:14px;overflow:hidden;background:#f7f2ff}
.case-media img{width:100%;height:auto;border-radius:14px}
.case-card h3{font-size:16px;font-weight:900;color:#2b1140;margin:14px 4px 6px}
.case-card p{font-size:13.5px;color:#5a5369;margin:0 4px 4px}

/* ---------- compare ---------- */
.compare-layout{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}
.table-wrap{
  overflow-x:auto;background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:20px;
  -webkit-overflow-scrolling:touch;
}
table{width:100%;border-collapse:collapse;min-width:640px}
thead th{
  background:linear-gradient(120deg,#fff0f5,#f2ecff);color:#2b1140;font-weight:900;font-size:14px;
  text-align:left;padding:15px 18px;border-bottom:1px solid rgba(23,19,33,.08);
}
tbody td{padding:14px 18px;font-size:14px;color:#3b3448;border-bottom:1px solid rgba(23,19,33,.06)}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fffaf7}
tbody td:first-child{font-weight:700;color:#2b1140}
.score-card{
  background:linear-gradient(160deg,#2b1140 0%,#5b1f8a 52%,#c2185b 100%);
  border-radius:22px;padding:26px 22px;color:#fff;
  box-shadow:0 28px 52px -30px rgba(43,17,64,.95);
}
.score-card h3{font-size:15px;font-weight:700;color:#f6d6ea;letter-spacing:.08em}
.score-num{font-size:52px;font-weight:900;line-height:1.1;margin:8px 0 2px}
.score-num small{font-size:18px;font-weight:700;color:#f3cfe4}
.stars{font-size:20px;letter-spacing:4px;color:#ffd166;margin-bottom:14px}
.score-card ul{list-style:none;display:flex;flex-direction:column;gap:9px;font-size:13.5px;color:#f4e6f3}
.score-card li{display:flex;gap:8px;align-items:flex-start}
.score-card li::before{content:"";width:6px;height:6px;border-radius:50%;background:#ffd166;flex:none;margin-top:8px}

/* ---------- reviews ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:20px;padding:22px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.review:hover{transform:translateY(-4px);box-shadow:0 24px 44px -30px rgba(255,46,99,.9)}
.review p{font-size:14px;color:#3f394d}
.review-user{display:flex;align-items:center;gap:11px;margin-top:16px;padding-top:14px;border-top:1px dashed rgba(23,19,33,.1)}
.avatar{
  width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:900;color:#fff;flex:none;
  background:linear-gradient(135deg,#ff2e63,#7c3aed);
}
.review-user strong{display:block;font-size:14px;color:#2b1140}
.review-user span{display:block;font-size:12.5px;color:#7c7488}

/* ---------- token ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.plan{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:20px;padding:22px 20px;
  display:flex;flex-direction:column;gap:8px;transition:transform .25s ease,border-color .25s ease;
}
.plan:hover{transform:translateY(-4px);border-color:rgba(124,58,237,.4)}
.plan h3{font-size:16px;font-weight:900;color:#2b1140}
.plan .plan-tag{
  align-self:flex-start;font-size:12px;font-weight:800;color:#0a7d5f;background:#eafaf4;
  border-radius:8px;padding:3px 10px;
}
.plan p{font-size:13.5px;color:#5a5369}
.plan-note{margin-top:16px;font-size:13px;color:#7c7488}

/* ---------- form ---------- */
.form-card{
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:24px;padding:28px;
  box-shadow:0 28px 60px -40px rgba(43,17,64,.85);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:800;color:#3b3448}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:12px;border:1px solid rgba(23,19,33,.15);
  background:#fdfbff;font-size:14.5px;font-family:inherit;color:#171321;transition:.2s;
}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:#ff2e63;background:#fff;box-shadow:0 0 0 3px rgba(255,46,99,.14);
}
.form-actions{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.form-actions .hint{font-size:13px;color:#7c7488}

/* ---------- faq ---------- */
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start}
.faq-item{background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:16px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:rgba(255,46,99,.35);box-shadow:0 18px 36px -28px rgba(255,46,99,.9)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 18px;background:none;border:0;cursor:pointer;text-align:left;
  font-family:inherit;font-size:14.5px;font-weight:700;color:#2b1140;
}
.faq-q .ico{
  flex:none;width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:#fff0f5;color:#d81b60;font-size:15px;font-weight:900;transition:transform .25s ease;
}
.faq-item.open .faq-q .ico{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:0 18px 18px;font-size:13.5px;color:#5a5369;line-height:1.75}

/* ---------- help / wiki / news ---------- */
.help-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.help-card{background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:18px;padding:20px 18px;transition:transform .25s ease,box-shadow .25s ease}
.help-card:hover{transform:translateY(-3px);box-shadow:0 20px 38px -30px rgba(43,17,64,.9)}
.help-card h3{font-size:15px;font-weight:900;color:#2b1140;margin-bottom:6px}
.help-card p{font-size:13px;color:#6b6379}
.wiki-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.wiki-item{background:#fff;border-left:4px solid rgba(255,46,99,.55);border-radius:14px;padding:18px 18px 18px 20px}
.wiki-item h3{font-size:15px;font-weight:900;color:#2b1140;margin-bottom:5px}
.wiki-item p{font-size:13.5px;color:#5a5369}
.news-list{display:grid;grid-template-columns:1fr;gap:12px}
.news-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:14px;padding:16px 20px;
  text-decoration:none;transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.news-item:hover{transform:translateX(4px);border-color:rgba(124,58,237,.35);background:#fffaf9}
.news-item strong{font-size:14.5px;color:#2b1140;font-weight:700}
.news-item span{font-size:13px;color:#b3184b;font-weight:700;white-space:nowrap}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:start}
.contact-info{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.contact-item{background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:16px;padding:16px 18px}
.contact-item h3{font-size:13px;font-weight:800;color:#7c7488;letter-spacing:.06em}
.contact-item p{font-size:14.5px;color:#2b1140;font-weight:700;margin-top:4px;word-break:break-all}
.qr-card{background:#fff;border:1px solid rgba(23,19,33,.08);border-radius:20px;padding:22px;text-align:center}
.qr-card h3{font-size:15px;font-weight:900;color:#2b1140;margin-bottom:6px}
.qr-box{width:168px;margin:12px auto 0;padding:8px;border-radius:14px;background:#faf6ff;border:1px solid rgba(124,58,237,.16)}
.qr-box img{width:100%;height:auto;border-radius:10px}
.qr-card p{font-size:13px;color:#6b6379;margin-top:12px}

/* ---------- join ---------- */
.join-card{
  background:linear-gradient(130deg,#fff0f6 0%,#f5ecff 52%,#fff4e6 100%);
  border:1px solid rgba(124,58,237,.18);border-radius:26px;padding:34px;
  display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;
}
.join-card h2{font-size:clamp(22px,2.6vw,28px);font-weight:900;color:#2b1140;margin-bottom:12px}
.join-card p{font-size:14.5px;color:#4a4358}
.join-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.join-list li{
  background:#fff;border-radius:12px;padding:11px 14px;font-size:13.5px;font-weight:700;color:#2b1140;
  border:1px solid rgba(23,19,33,.08);
}

/* ---------- footer ---------- */
.site-footer{
  margin-top:56px;background:#17111f;color:#cfc7da;
  border-top:3px solid transparent;
  border-image:linear-gradient(90deg,#ff2e63,#7c3aed,#ff8a00) 1;
  padding:40px 0 22px;
}
.footer-top{display:grid;grid-template-columns:1.1fr 1fr 1.4fr;gap:32px;align-items:start}
.footer-brand{display:flex;flex-direction:column;gap:12px}
.footer-brand .ai-page-logo{max-height:34px}
.footer-brand p{font-size:13.5px;color:#a99fbb;line-height:1.75}
.site-footer h3{font-size:14px;font-weight:800;color:#fff;margin-bottom:12px;letter-spacing:.04em}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:7px}
.footer-list li{font-size:13.5px;color:#b9b0c8;word-break:break-all}
.footer-list a{color:#e6def2;text-decoration:none;transition:color .2s ease}
.footer-list a:hover{color:#ff8ab3}
.flinks{display:flex;flex-wrap:wrap;gap:8px 14px}
.flinks a{font-size:13px;color:#b9b0c8;text-decoration:none;transition:color .2s ease}
.flinks a:hover{color:#ff8ab3}
.footer-bottom{
  margin-top:28px;padding-top:16px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:#8f86a1;
}
.footer-bottom a{color:#b9b0c8;text-decoration:none}
.footer-bottom a:hover{color:#ff8ab3}

/* ---------- float ---------- */
.float-bar{position:fixed;right:18px;bottom:22px;z-index:90;display:flex;flex-direction:column;gap:10px}
.float-btn{
  width:54px;height:54px;border-radius:16px;border:0;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  font-family:inherit;font-size:11px;font-weight:800;color:#fff;text-decoration:none;
  background:linear-gradient(135deg,#ff2e63,#7c3aed);
  box-shadow:0 14px 28px -12px rgba(124,58,237,.85);
  transition:transform .22s ease,box-shadow .22s ease;
}
.float-btn:hover{transform:translateY(-3px);box-shadow:0 20px 34px -14px rgba(255,46,99,.9)}
.float-btn.top{background:linear-gradient(135deg,#2b1140,#5b1f8a)}
.float-btn svg{display:block}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .site-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:#fffdfb;border-bottom:1px solid rgba(23,19,33,.1);
    box-shadow:0 20px 34px -22px rgba(43,17,64,.6);padding:10px 16px 16px;
  }
  .site-nav.open{display:block}
  .nav-links{flex-direction:column;align-items:stretch;gap:0}
  .nav-links a{padding:12px 10px;font-size:15px}
  .header-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .about-grid{grid-template-columns:1fr}
  .compare-layout{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .join-card{grid-template-columns:1fr}
  .service-grid{grid-template-columns:repeat(3,1fr)}
  .industry-grid{grid-template-columns:repeat(2,1fr)}
  .network{grid-template-columns:repeat(3,1fr)}
  .timeline{grid-template-columns:repeat(3,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .plan-grid{grid-template-columns:repeat(2,1fr)}
  .help-grid{grid-template-columns:repeat(2,1fr)}
  .wiki-list{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .hero{padding:36px 0 10px}
  .section{padding:44px 0}
  .metrics{grid-template-columns:repeat(2,1fr);gap:12px}
  .service-grid{grid-template-columns:1fr 1fr;gap:14px}
  .flow{grid-template-columns:1fr 1fr;gap:14px}
  .industry-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr 1fr}
  .case-grid{grid-template-columns:1fr 1fr;gap:14px}
  .review-grid{grid-template-columns:1fr}
  .plan-grid{grid-template-columns:1fr}
  .faq-list{grid-template-columns:1fr}
  .help-grid{grid-template-columns:1fr 1fr}
  .wiki-list{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .contact-info{grid-template-columns:1fr}
  .join-list{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;gap:24px}
  .form-card{padding:20px}
  .join-card{padding:24px}
  .float-bar{right:12px;bottom:14px}
  .float-btn{width:48px;height:48px;border-radius:14px;font-size:10px}
}
@media (max-width:480px){
  .service-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .network{grid-template-columns:1fr 1fr}
  .help-grid{grid-template-columns:1fr}
  .about-cards{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr 1fr}
  .hero-actions .btn{flex:1 1 auto}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition:none!important}
}