:root{
  --ink:#151a26;
  --ink-2:#3b4356;
  --muted:#616b7f;
  --line:#e6e9f4;
  --bg:#fbfbfe;
  --c1:#6d5bef;
  --c2:#0ea5e9;
  --c3:#10b981;
  --c4:#f59e0b;
  --c5:#ec4899;
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background-color:var(--bg);
  background-image:
    radial-gradient(1000px 540px at 6% -8%, rgba(109,91,239,.16), transparent 68%),
    radial-gradient(920px 520px at 100% 2%, rgba(14,165,233,.14), transparent 68%),
    radial-gradient(940px 640px at 50% 106%, rgba(16,185,129,.10), transparent 70%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,p{margin:0}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 20px}

/* header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:66px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.ai-page-logo{display:block;max-height:34px;width:auto}
.brand-text{font-weight:800;font-size:17px;letter-spacing:.4px;color:var(--ink);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap}
.nav-links a{
  display:block;
  padding:9px 10px;
  font-size:14px;
  font-weight:600;
  color:var(--ink-2);
  border-radius:10px;
  white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:#5246d8;background:#f2f1ff}
.nav-cta{
  flex:0 0 auto;
  padding:9px 18px;
  border-radius:999px;
  font-size:14px;
  font-weight:700;
  color:#fff;
  background:linear-gradient(135deg,#6d5bef,#0ea5e9);
  box-shadow:0 8px 20px rgba(109,91,239,.26);
  transition:transform .22s ease,box-shadow .22s ease;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(109,91,239,.34)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:38px;border-radius:11px;
  border:1px solid var(--line);background:#fff;color:var(--ink);
  font-size:13px;font-weight:700;cursor:pointer;
}
.nav-toggle:hover{border-color:#c9c4f6;color:#5246d8}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.btn-primary{background:linear-gradient(135deg,#6d5bef,#0ea5e9);color:#fff;box-shadow:0 12px 26px rgba(109,91,239,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(109,91,239,.34)}
.btn-outline{background:#fff;color:var(--ink);border-color:#d7dbee}
.btn-outline:hover{border-color:#6d5bef;color:#5246d8;transform:translateY(-2px)}
.btn-text{background:transparent;color:#5246d8;padding:13px 4px}
.btn-text:hover{color:#3f33c4}

/* hero */
.hero{padding:56px 0 64px}
.hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center}
.pill{
  display:inline-block;
  padding:7px 16px;border-radius:999px;
  font-size:13px;font-weight:700;letter-spacing:.3px;
  color:#4c3fd0;
  background:linear-gradient(135deg,#eeebff,#e4f4ff);
  border:1px solid #ded9ff;
}
.hero h1{
  margin-top:18px;
  font-size:clamp(30px,4.4vw,48px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.5px;
  color:var(--ink);
}
.hero-lead{margin-top:18px;font-size:16.5px;color:var(--ink-2);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:26px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-points li{
  font-size:13.5px;font-weight:600;color:#43506a;
  padding:7px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);
}
.hero-points li::before{content:"✓";color:var(--c3);font-weight:800;margin-right:7px}
.hero-panel{
  position:relative;
  padding:26px;
  border-radius:24px;
  border:1px solid transparent;
  background:linear-gradient(#fff,#fff) padding-box,
             linear-gradient(135deg,rgba(109,91,239,.6),rgba(14,165,233,.5),rgba(16,185,129,.45),rgba(245,158,11,.5),rgba(236,72,153,.5)) border-box;
  box-shadow:0 20px 48px rgba(21,26,38,.1);
}
.hero-glow{
  position:absolute;inset:auto -30px -30px auto;width:170px;height:170px;border-radius:50%;
  background:radial-gradient(circle,rgba(109,91,239,.22),transparent 68%);
  pointer-events:none;
}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;position:relative}
.metric{background:#f8f9fe;border-radius:14px;padding:16px 14px;border-left:4px solid var(--c1)}
.metric.m2{border-left-color:var(--c2)}
.metric.m3{border-left-color:var(--c4)}
.metric.m4{border-left-color:var(--c3)}
.metric strong{display:block;font-size:24px;font-weight:800;line-height:1.25;color:var(--ink)}
.metric span{font-size:13px;color:var(--muted)}
.metric-note{margin-top:16px;font-size:13.5px;color:var(--muted);position:relative}

/* section */
.section{padding:70px 0}
.section-head{max-width:800px;margin-bottom:36px}
.tag{
  display:inline-block;padding:6px 14px;border-radius:999px;
  font-size:12.5px;font-weight:800;letter-spacing:.6px;
  color:#4c3fd0;background:#eff0ff;border:1px solid #e0ddff;
}
.section-head h2{
  margin:14px 0 12px;
  font-size:clamp(23px,2.9vw,32px);
  line-height:1.32;
  font-weight:800;
  letter-spacing:-.3px;
}
.section-head p{color:var(--muted);font-size:15.5px}

/* about */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:start}
.about-copy p{color:var(--ink-2);font-size:15.5px;margin-bottom:14px}
.about-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.about-list li{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:14px 16px;font-size:14.5px;color:var(--ink-2);
  box-shadow:0 6px 18px rgba(21,26,38,.04);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.about-list li:hover{transform:translateY(-3px);box-shadow:0 14px 28px rgba(21,26,38,.09);border-color:#d5d2f6}
.about-list b{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
.about-media{background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:0 14px 34px rgba(21,26,38,.07)}
.about-media img{display:block;width:100%;border-radius:12px;object-fit:contain;background:#f4f5fb}

/* service cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.svc-card{
  position:relative;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:0 8px 22px rgba(21,26,38,.05);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.svc-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--a),var(--b))}
.svc-card:nth-child(6n+1){--a:#6d5bef;--b:#0ea5e9}
.svc-card:nth-child(6n+2){--a:#0ea5e9;--b:#10b981}
.svc-card:nth-child(6n+3){--a:#10b981;--b:#f59e0b}
.svc-card:nth-child(6n+4){--a:#f59e0b;--b:#ec4899}
.svc-card:nth-child(6n+5){--a:#ec4899;--b:#6d5bef}
.svc-card:nth-child(6n+6){--a:#0ea5e9;--b:#6d5bef}
.svc-card:hover{transform:translateY(-5px);box-shadow:0 20px 40px rgba(21,26,38,.1);border-color:#dcd9f8}
.svc-card h3{font-size:17.5px;font-weight:800;margin-bottom:8px;color:var(--ink)}
.svc-card p{font-size:14.5px;color:var(--muted)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:8px}
.steps li{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:22px 20px;box-shadow:0 8px 20px rgba(21,26,38,.05);
  transition:transform .22s ease,box-shadow .22s ease;
}
.steps li:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(21,26,38,.09)}
.step-no{
  display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:1px;
  color:#5246d8;background:#f0efff;border-radius:8px;padding:3px 9px;margin-bottom:10px;
}
.steps h3{font-size:16px;font-weight:800;margin-bottom:6px}
.steps p{font-size:14px;color:var(--muted)}
.model-cloud{margin-top:34px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:0 10px 26px rgba(21,26,38,.05)}
.model-cloud h3{font-size:17px;font-weight:800;margin-bottom:14px}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips li{
  font-size:13px;font-weight:600;color:#414b62;
  padding:6px 13px;border-radius:999px;
  background:#f6f7fd;border:1px solid #e8ebf7;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.chips li:hover{background:#eef0ff;color:#4c3fd0;border-color:#d9d5ff}
.note{margin-top:16px;font-size:13.5px;color:var(--muted)}
.media-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}
.media-strip img{display:block;width:100%;border-radius:16px;background:#fff;border:1px solid var(--line);object-fit:contain}

/* solutions */
.sol-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px}
.sol-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:0 8px 20px rgba(21,26,38,.05);
  transition:transform .24s ease,box-shadow .24s ease;
}
.sol-card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(21,26,38,.1)}
.sol-card h3{font-size:16.5px;font-weight:800;margin-bottom:10px;display:flex;align-items:center;gap:9px}
.sol-card h3::before{content:"";width:9px;height:9px;border-radius:3px;background:linear-gradient(135deg,#6d5bef,#0ea5e9);flex:0 0 auto}
.sol-card p{font-size:14.5px;color:var(--muted)}

/* network */
.net-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.net-item{
  background:linear-gradient(160deg,#ffffff,#f7f8ff);
  border:1px solid var(--line);border-radius:16px;padding:20px;
  transition:transform .22s ease,box-shadow .22s ease;
}
.net-item:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(21,26,38,.09)}
.net-item span{display:block;font-size:13px;font-weight:700;color:#5246d8;margin-bottom:6px}
.net-item strong{display:block;font-size:15.5px;font-weight:800;color:var(--ink);word-break:break-all}

/* timeline */
.timeline{position:relative;margin-top:10px;padding-left:26px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:3px;border-radius:3px;background:linear-gradient(180deg,#6d5bef,#0ea5e9,#10b981,#f59e0b,#ec4899)}
.timeline li{position:relative;padding:0 0 22px 8px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{
  content:"";position:absolute;left:-25px;top:7px;width:13px;height:13px;border-radius:50%;
  background:#fff;border:3px solid #6d5bef;
}
.timeline li:nth-child(2)::before{border-color:#0ea5e9}
.timeline li:nth-child(3)::before{border-color:#10b981}
.timeline li:nth-child(4)::before{border-color:#f59e0b}
.timeline li:nth-child(5)::before{border-color:#ec4899}
.timeline h3{font-size:16px;font-weight:800;margin-bottom:4px}
.timeline p{font-size:14.5px;color:var(--muted)}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:20px}
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px;
  box-shadow:0 10px 26px rgba(21,26,38,.06);
  transition:transform .24s ease,box-shadow .24s ease;
}
.case-card:hover{transform:translateY(-5px);box-shadow:0 22px 44px rgba(21,26,38,.11)}
.case-media{background:#f4f5fb;border-radius:14px;overflow:hidden;aspect-ratio:16/10;display:flex;align-items:center;justify-content:center}
.case-media img{width:100%;height:100%;object-fit:contain}
.case-card h3{font-size:16.5px;font-weight:800;margin:14px 0 6px}
.case-card p{font-size:14px;color:var(--muted)}

/* reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;
  box-shadow:0 8px 22px rgba(21,26,38,.05);display:flex;flex-direction:column;gap:14px;
  transition:transform .24s ease,box-shadow .24s ease;
}
.review-card:hover{transform:translateY(-4px);box-shadow:0 18px 38px rgba(21,26,38,.1)}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;color:#fff;
  background:linear-gradient(135deg,#6d5bef,#0ea5e9);
}
.review-card:nth-child(2) .avatar{background:linear-gradient(135deg,#0ea5e9,#10b981)}
.review-card:nth-child(3) .avatar{background:linear-gradient(135deg,#10b981,#f59e0b)}
.review-card:nth-child(4) .avatar{background:linear-gradient(135deg,#f59e0b,#ec4899)}
.review-card:nth-child(5) .avatar{background:linear-gradient(135deg,#ec4899,#6d5bef)}
.review-card:nth-child(6) .avatar{background:linear-gradient(135deg,#0ea5e9,#6d5bef)}
.review-head b{display:block;font-size:15px;font-weight:800;color:var(--ink);line-height:1.4}
.review-head em{font-style:normal;font-size:12.5px;color:var(--muted)}
.review-card p{font-size:14.5px;color:var(--ink-2)}

/* review score & table */
.review-top{display:grid;grid-template-columns:300px 1fr;gap:22px;align-items:stretch;margin-bottom:26px}
.score-card{
  background:linear-gradient(150deg,#ffffff,#f5f3ff);
  border:1px solid #ddd9ff;border-radius:20px;padding:26px;text-align:center;
  box-shadow:0 14px 32px rgba(109,91,239,.12);
}
.score-num{font-size:52px;font-weight:800;line-height:1;color:#4c3fd0;letter-spacing:-1px}
.score-num span{font-size:18px;color:var(--muted);font-weight:700;margin-left:4px}
.stars{margin:12px 0 8px;font-size:20px;letter-spacing:4px;color:#f59e0b}
.score-card p{font-size:14px;color:var(--ink-2);font-weight:600}
.review-desc{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 8px 22px rgba(21,26,38,.05)}
.review-desc h3{font-size:17px;font-weight:800;margin-bottom:10px}
.review-desc p{font-size:14.5px;color:var(--muted)}
.review-desc p+p{margin-top:8px}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 10px 26px rgba(21,26,38,.05)}
.cmp-table{width:100%;min-width:760px;border-collapse:collapse;font-size:14.5px}
.cmp-table th,.cmp-table td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-2)}
.cmp-table thead th{background:#f6f7fd;font-weight:800;color:var(--ink);font-size:14px;white-space:nowrap}
.cmp-table thead th:nth-child(2){color:#4c3fd0}
.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table tbody tr:hover td{background:#fafaff}
.cmp-table td:nth-child(2){color:#37308f;font-weight:600}

/* token */
.token-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.token-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;
  box-shadow:0 8px 22px rgba(21,26,38,.05);
  transition:transform .22s ease,box-shadow .22s ease;
}
.token-card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(21,26,38,.1)}
.token-card h3{font-size:16.5px;font-weight:800;margin-bottom:10px}
.token-card dl{margin:0;font-size:14px;color:var(--muted)}
.token-card dt{font-weight:700;color:var(--ink-2);margin-top:10px}
.token-card dd{margin:2px 0 0}
.cta-row{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* form */
.form-wrap{
  background:#fff;border:1px solid var(--line);border-radius:24px;padding:30px;
  box-shadow:0 16px 40px rgba(21,26,38,.08);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1 / -1}
.field span{font-size:13.5px;font-weight:700;color:var(--ink-2)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:12px;
  border:1px solid #dfe3f0;background:#fbfbff;color:var(--ink);
  font-size:14.5px;font-family:inherit;line-height:1.5;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{min-height:118px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:#8f85f0;background:#fff;box-shadow:0 0 0 4px rgba(109,91,239,.13);
}
.field input::placeholder,.field textarea::placeholder{color:#9aa2b6}
.form-foot{grid-column:1 / -1;display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:4px}
.form-foot p{font-size:13px;color:var(--muted)}

/* help */
.help-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.help-card{
  background:linear-gradient(160deg,#ffffff,#f6f7ff);
  border:1px solid var(--line);border-radius:18px;padding:24px;
  transition:transform .22s ease,box-shadow .22s ease;
}
.help-card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(21,26,38,.09)}
.help-card h3{font-size:16.5px;font-weight:800;margin-bottom:8px}
.help-card p{font-size:14.5px;color:var(--muted);margin-bottom:14px}
.help-card a{font-size:14px;font-weight:700;color:#5246d8}
.help-card a:hover{color:#3f33c4}

/* faq */
.faq-list{max-width:920px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:0 20px;margin-bottom:12px;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item[open]{border-color:#cbc6f8;box-shadow:0 14px 30px rgba(21,26,38,.08)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 34px 18px 0;font-size:16px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:700;color:#6d5bef;line-height:1;
}
.faq-item[open] summary::after{content:"−"}
.faq-body{font-size:14.5px;color:var(--muted);padding:0 0 18px;margin:0}

/* wiki & news */
.wiki-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.wiki-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;transition:transform .2s ease,box-shadow .2s ease}
.wiki-item:hover{transform:translateY(-3px);box-shadow:0 14px 28px rgba(21,26,38,.08)}
.wiki-item b{display:block;font-size:15px;font-weight:800;color:var(--ink);margin-bottom:4px}
.wiki-item span{font-size:13.5px;color:var(--muted)}
.news-list{display:grid;gap:12px;max-width:920px}
.news-list li{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.news-list li:hover{transform:translateX(4px);border-color:#d9d5ff;box-shadow:0 10px 24px rgba(21,26,38,.07)}
.news-list a{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 20px;font-size:15px;font-weight:600;color:var(--ink-2)}
.news-list a::after{content:"→";color:#6d5bef;font-weight:800;flex:0 0 auto}
.news-list a:hover{color:#3f33c4}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:start}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:0 12px 30px rgba(21,26,38,.06)}
.contact-card h3{font-size:17px;font-weight:800;margin-bottom:14px}
.contact-list li{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed #e9ecf7;font-size:14.5px;color:var(--ink-2)}
.contact-list li:last-child{border-bottom:none}
.contact-list b{flex:0 0 88px;color:var(--ink);font-weight:700}
.contact-list a{color:#5246d8;font-weight:600;word-break:break-all}
.qr-box{margin-top:6px;text-align:center}
.qr-box img{display:block;width:100%;max-width:210px;margin:0 auto;border-radius:14px;border:1px solid var(--line);background:#fff}
.qr-box p{font-size:13px;color:var(--muted);margin-top:10px}
.join-card{
  background:linear-gradient(150deg,#ffffff,#f3f1ff);
  border:1px solid #ddd9ff;border-radius:20px;padding:26px;box-shadow:0 14px 32px rgba(109,91,239,.12);
}
.join-card h3{font-size:17px;font-weight:800;margin-bottom:10px}
.join-card p{font-size:14.5px;color:var(--ink-2);margin-bottom:12px}
.join-card ul{display:grid;gap:8px;margin-bottom:18px}
.join-card li{font-size:14px;color:var(--ink-2);padding-left:20px;position:relative}
.join-card li::before{content:"◆";position:absolute;left:0;top:0;color:#6d5bef;font-size:11px}

/* footer */
.site-footer{
  margin-top:20px;
  background:linear-gradient(180deg,#f5f6fd,#eef0fa);
  border-top:4px solid transparent;
  border-image:linear-gradient(90deg,#6d5bef,#0ea5e9,#10b981,#f59e0b,#ec4899) 1;
  color:#2a3142;
  padding:44px 0 0;
}
.footer-inner{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:30px;align-items:start}
.footer-name{font-size:18px;font-weight:800;color:#151a26;margin-bottom:8px}
.footer-desc{font-size:14px;color:#4d566b;max-width:420px}
.footer-site{display:inline-block;margin-top:12px;font-size:14px;font-weight:700;color:#4c3fd0}
.footer-site:hover{text-decoration:underline}
.footer-title{font-size:14px;font-weight:800;color:#151a26;margin-bottom:12px}
.footer-col ul{display:grid;gap:8px}
.footer-col a,.footer-col span{font-size:14px;color:#4d566b;word-break:break-all}
.footer-col a:hover{color:#4c3fd0}
.footer-links{padding:28px 20px 8px}
.friend-links{display:flex;flex-wrap:wrap;gap:10px 18px}
.friend-links a{font-size:13.5px;color:#4d566b}
.friend-links a:hover{color:#4c3fd0;text-decoration:underline}
.footer-bottom{margin-top:22px;border-top:1px solid #dde1ef;padding:16px 0}
.footer-bottom p{font-size:13px;color:#5b6479;text-align:center}

/* floating */
.float-kf{position:fixed;right:18px;bottom:82px;z-index:120;display:flex;flex-direction:column;align-items:flex-end;gap:10px}
.kf-btn{
  width:56px;height:56px;border-radius:50%;border:none;cursor:pointer;
  color:#fff;font-size:13px;font-weight:800;
  background:linear-gradient(135deg,#6d5bef,#0ea5e9);
  box-shadow:0 12px 26px rgba(109,91,239,.34);
  transition:transform .2s ease,box-shadow .2s ease;
}
.kf-btn:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(109,91,239,.42)}
.kf-panel{
  display:none;width:216px;background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:14px;box-shadow:0 18px 40px rgba(21,26,38,.16);text-align:center;
}
.kf-panel.open{display:block}
.kf-panel img{display:block;width:100%;border-radius:10px;border:1px solid var(--line)}
.kf-panel p{font-size:12.5px;color:var(--ink-2);margin-top:8px}
.kf-panel a{display:block;font-size:12.5px;color:#5246d8;font-weight:700;margin-top:4px;word-break:break-all}
.back-top{
  position:fixed;right:18px;bottom:18px;z-index:120;
  width:56px;height:56px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:#3b4356;font-size:13px;font-weight:800;cursor:pointer;
  box-shadow:0 10px 24px rgba(21,26,38,.14);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,border-color .2s ease,color .2s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{border-color:#6d5bef;color:#5246d8}

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

/* responsive */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:absolute;top:100%;left:20px;right:20px;
    flex-direction:column;align-items:stretch;gap:0;
    display:none;
    background:#fff;border:1px solid var(--line);border-radius:16px;
    padding:10px;margin-top:8px;
    box-shadow:0 20px 44px rgba(21,26,38,.14);
    max-height:min(70vh,520px);overflow-y:auto;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;border-radius:10px;font-size:15px}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .about-grid{grid-template-columns:1fr}
  .review-top{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .section{padding:50px 0}
  .hero{padding:38px 0 48px}
  .about-list{grid-template-columns:1fr}
  .media-strip{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .nav-cta{padding:8px 14px;font-size:13px}
  .brand-text{font-size:15px}
  .metric-grid{grid-template-columns:1fr 1fr;gap:10px}
  .metric strong{font-size:21px}
  .form-wrap{padding:22px}
  .footer-links{padding:22px 20px 8px}
}
@media (max-width:380px){
  .brand-text{display:none}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none !important}
}