*{margin:0;padding:0;box-sizing:border-box}
:root{
  --green:#22c55e;
  --green-dark:#16a34a;
  --green-deep:#0f7a3d;
  --green-light:#e9fbf0;
  --ink:#14261b;
  --ink-soft:#3f5347;
  --ink-mute:#6b7d70;
  --line:#d9ece0;
  --bg:#f5fcf7;
  --card:#ffffff;
  --shadow:0 10px 30px rgba(22,163,74,.08);
  --shadow-hover:0 18px 44px rgba(22,163,74,.16);
  --radius:18px;
  --radius-sm:12px;
}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(34,197,94,.10), transparent 42%),
    radial-gradient(circle at 88% 14%, rgba(34,197,94,.08), transparent 40%),
    linear-gradient(180deg,#f7fdf9 0%,#f0faf3 50%,#f5fcf7 100%);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
ul{list-style:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:68px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand img{width:44px;height:auto;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;color:var(--ink);letter-spacing:.5px}
.brand-text span{font-size:11px;color:var(--green-deep);letter-spacing:1.5px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap}
.nav-links a{
  display:inline-block;padding:8px 11px;font-size:14px;color:var(--ink-soft);
  border-radius:8px;transition:color .2s,background .2s;white-space:nowrap;
}
.nav-links a:hover{color:var(--green-deep);background:var(--green-light)}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;flex-shrink:0;
  background:linear-gradient(135deg,var(--green),var(--green-dark));
  color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;font-weight:600;
  box-shadow:0 8px 20px rgba(34,197,94,.28);
  transition:transform .2s,box-shadow .2s;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(34,197,94,.4)}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.menu-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:72px 0 84px;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(34,197,94,.18), transparent 55%),
    radial-gradient(ellipse at 85% 30%, rgba(22,163,74,.14), transparent 50%),
    linear-gradient(160deg,#ffffff 0%,#eefbf2 100%);
  border-bottom:1px solid var(--line);
}
.hero::before,.hero::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(34,197,94,.22),transparent 70%);
  filter:blur(6px);
}
.hero::before{width:360px;height:360px;top:-140px;right:-80px;animation:float 9s ease-in-out infinite}
.hero::after{width:260px;height:260px;bottom:-120px;left:-60px;animation:float 11s ease-in-out infinite reverse}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-18px)}}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(34,197,94,.12);color:var(--green-deep);
  padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600;
  border:1px solid rgba(34,197,94,.28);margin-bottom:20px;
}
.hero-eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(34,197,94,.2)}
.hero h1{
  font-size:44px;line-height:1.25;letter-spacing:-.5px;
  color:var(--ink);font-weight:800;margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--green-dark);position:relative}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:8px;
  background:rgba(34,197,94,.2);border-radius:4px;z-index:-1;
}
.hero-desc{font-size:16px;color:var(--ink-soft);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;font-size:15px;font-weight:600;
  cursor:pointer;border:none;transition:transform .2s,box-shadow .2s,background .2s;
}
.btn-primary{
  background:linear-gradient(135deg,var(--green),var(--green-dark));
  color:#fff;box-shadow:0 10px 26px rgba(34,197,94,.32);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(34,197,94,.42)}
.btn-ghost{
  background:#fff;color:var(--green-deep);border:1.5px solid rgba(34,197,94,.4);
}
.btn-ghost:hover{background:var(--green-light);transform:translateY(-3px)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span{
  font-size:13px;color:var(--ink-soft);background:#fff;border:1px solid var(--line);
  padding:6px 14px;border-radius:999px;transition:.2s;
}
.hero-tags span:hover{border-color:var(--green);color:var(--green-deep);transform:translateY(-2px)}

/* hero visual (pure css, no images) */
.hero-visual{position:relative;min-height:340px;display:flex;align-items:center;justify-content:center}
.orb{
  width:280px;height:280px;border-radius:50%;
  background:conic-gradient(from 180deg,rgba(34,197,94,.9),rgba(34,197,94,.2),rgba(22,163,74,.85),rgba(34,197,94,.9));
  animation:spin 18s linear infinite;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 30px 70px rgba(34,197,94,.35);
}
.orb::after{
  content:"";position:absolute;width:232px;height:232px;border-radius:50%;
  background:linear-gradient(160deg,#ffffff,#effbf3);
}
@keyframes spin{to{transform:rotate(360deg)}}
.orb-core{
  position:absolute;z-index:3;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:4px;
}
.orb-core strong{font-size:30px;color:var(--green-deep);font-weight:800;letter-spacing:.5px}
.orb-core span{font-size:12px;color:var(--ink-mute);letter-spacing:2px}
.orbit-chip{
  position:absolute;background:#fff;border:1px solid var(--line);
  padding:8px 16px;border-radius:999px;font-size:13px;font-weight:600;color:var(--ink-soft);
  box-shadow:var(--shadow);animation:float 6s ease-in-out infinite;
}
.chip-1{top:8%;left:0}
.chip-2{top:32%;right:-4%;animation-delay:1.2s}
.chip-3{bottom:16%;left:2%;animation-delay:2.4s}
.chip-4{bottom:2%;right:8%;animation-delay:1.8s}

/* ---------- data metrics ---------- */
.metrics{padding:56px 0}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;text-align:center;box-shadow:var(--shadow);
  transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden;
}
.metric-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--green),transparent);
  transform:scaleX(0);transform-origin:left;transition:transform .3s;
}
.metric-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.metric-card:hover::before{transform:scaleX(1)}
.metric-num{font-size:34px;font-weight:800;color:var(--green-dark);line-height:1.2}
.metric-num small{font-size:16px;color:var(--ink-mute);font-weight:600;margin-left:2px}
.metric-label{font-size:14px;color:var(--ink-soft);margin-top:6px}

/* ---------- sections shared ---------- */
.section{padding:76px 0}
.section-head{max-width:720px;margin:0 auto 48px;text-align:center}
.section-tag{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;
  color:var(--green-dark);background:var(--green-light);
  padding:6px 14px;border-radius:999px;margin-bottom:14px;
}
.section-head h2{font-size:34px;font-weight:800;color:var(--ink);letter-spacing:-.3px;line-height:1.3;margin-bottom:14px}
.section-head p{font-size:15px;color:var(--ink-mute)}
.alt-bg{
  background:linear-gradient(180deg,rgba(233,251,240,.55),rgba(255,255,255,0));
  border-top:1px solid rgba(217,236,224,.6);
  border-bottom:1px solid rgba(217,236,224,.6);
}

/* ---------- about / platform intro ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:flex-start}
.about-text h2{font-size:32px;font-weight:800;margin-bottom:18px;color:var(--ink)}
.about-text p{color:var(--ink-soft);margin-bottom:16px;font-size:15.5px}
.about-list{display:flex;flex-direction:column;gap:12px;margin-top:8px}
.about-list li{
  display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--ink-soft);
}
.about-list li::before{
  content:"";flex-shrink:0;width:20px;height:20px;border-radius:6px;margin-top:3px;
  background:var(--green-light) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'><path d='M5 10.5l3 3 7-7' fill='none' stroke='%2316a34a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/>") center/14px no-repeat;
}
.about-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.about-panel::after{
  content:"";position:absolute;right:-60px;top:-60px;width:180px;height:180px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,197,94,.16),transparent 70%);
}
.about-panel h3{font-size:19px;font-weight:700;margin-bottom:18px;color:var(--ink)}
.panel-stat{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--ink-soft)}
.panel-stat:last-child{border-bottom:none}
.panel-stat b{color:var(--green-dark);font-size:15px}

/* ---------- service cards ---------- */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.service-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;box-shadow:var(--shadow);
  transition:transform .25s,box-shadow .25s,border-color .25s;
  position:relative;
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(34,197,94,.45)}
.service-icon{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(34,197,94,.16),rgba(34,197,94,.06));
  color:var(--green-dark);margin-bottom:18px;
}
.service-icon svg{width:26px;height:26px}
.service-card h3{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--ink)}
.service-card p{font-size:14px;color:var(--ink-mute);line-height:1.75}

/* ---------- flow steps ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.flow-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);position:relative;
  transition:transform .25s,box-shadow .25s;
}
.flow-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.flow-num{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--green),var(--green-dark));color:#fff;font-weight:700;
  margin-bottom:16px;box-shadow:0 8px 18px rgba(34,197,94,.3);
}
.flow-item h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.flow-item p{font-size:13.5px;color:var(--ink-mute)}

/* ---------- scenario tabs ---------- */
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.scenario-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);display:flex;gap:18px;align-items:flex-start;
  transition:transform .25s,box-shadow .25s;
}
.scenario-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.scenario-badge{
  flex-shrink:0;width:48px;height:48px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--green-light);color:var(--green-dark);font-weight:800;font-size:15px;
}
.scenario-card h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.scenario-card p{font-size:13.5px;color:var(--ink-mute)}

/* ---------- model tags ---------- */
.model-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:32px}
.model-tags span{
  font-size:13px;padding:8px 16px;border-radius:999px;background:#fff;
  border:1px solid var(--line);color:var(--ink-soft);transition:.2s;
}
.model-tags span:hover{background:var(--green-light);color:var(--green-deep);border-color:rgba(34,197,94,.4);transform:translateY(-2px)}

/* ---------- network ---------- */
.network-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.network-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:24px;box-shadow:var(--shadow);transition:.25s;
}
.network-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.network-card h3{font-size:16px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.network-card p{font-size:13.5px;color:var(--ink-mute)}

/* ---------- showcase (cases) ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-media{position:relative;background:#eefaf2;aspect-ratio:4/3;overflow:hidden}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case-card:hover .case-media img{transform:scale(1.05)}
.case-body{padding:22px}
.case-body h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.case-body p{font-size:13.5px;color:var(--ink-mute)}

/* ---------- compare table ---------- */
.compare-wrap{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;
}
.compare-head{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:26px 28px;background:linear-gradient(135deg,rgba(34,197,94,.1),rgba(255,255,255,0));
  border-bottom:1px solid var(--line);
}
.compare-score{display:flex;align-items:center;gap:16px}
.score-big{font-size:44px;font-weight:800;color:var(--green-dark);line-height:1}
.score-sub{font-size:13px;color:var(--ink-mute)}
.score-sub b{display:block;font-size:15px;color:var(--ink);margin-bottom:4px}
.stars{color:#f59e0b;letter-spacing:2px;font-size:15px}
.table-scroll{overflow-x:auto}
table.compare{width:100%;border-collapse:collapse;min-width:640px}
table.compare th,table.compare td{
  padding:16px 20px;text-align:left;font-size:14px;border-bottom:1px solid var(--line);
}
table.compare th{background:#f4fbf6;color:var(--ink);font-weight:700;font-size:13.5px}
table.compare td{color:var(--ink-soft)}
table.compare td:first-child{font-weight:600;color:var(--ink)}
table.compare tr:hover td{background:#f9fefb}
.badge-yes{display:inline-block;background:var(--green-light);color:var(--green-deep);font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px}

/* ---------- token price ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.price-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;box-shadow:var(--shadow);transition:.25s;position:relative;overflow:hidden;
}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.price-card.featured{border-color:var(--green);box-shadow:0 16px 40px rgba(34,197,94,.18)}
.price-card.featured::before{
  content:"推荐";position:absolute;top:14px;right:-32px;transform:rotate(45deg);
  background:var(--green);color:#fff;font-size:12px;font-weight:700;
  padding:4px 40px;letter-spacing:1px;
}
.price-card h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.price-card .price{font-size:30px;font-weight:800;color:var(--green-dark);line-height:1.2;margin:10px 0 4px}
.price-card .price small{font-size:13px;color:var(--ink-mute);font-weight:500}
.price-card p{font-size:13.5px;color:var(--ink-mute);margin-bottom:16px}
.price-list{display:flex;flex-direction:column;gap:10px}
.price-list li{font-size:13.5px;color:var(--ink-soft);display:flex;gap:8px;align-items:flex-start}
.price-list li::before{content:"•";color:var(--green);font-weight:800}

/* ---------- faq ---------- */
.faq-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  overflow:hidden;transition:border-color .25s,box-shadow .25s;
}
.faq-item.open{border-color:rgba(34,197,94,.45);box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:15px;font-weight:600;color:var(--ink);font-family:inherit;
}
.faq-q .faq-icon{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--green-light);
  color:var(--green-dark);display:flex;align-items:center;justify-content:center;
  font-size:16px;transition:transform .3s,background .3s;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--green);color:#fff}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease;
}
.faq-a p{padding:0 22px 20px;font-size:14px;color:var(--ink-mute);line-height:1.8}

/* ---------- reviews ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column;gap:14px;
}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.review-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--green),var(--green-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
}
.review-name{font-size:14.5px;font-weight:700;color:var(--ink)}
.review-role{font-size:12.5px;color:var(--ink-mute)}
.review-stars{color:#f59e0b;font-size:13px;letter-spacing:1px}
.review-card p{font-size:13.5px;color:var(--ink-soft);line-height:1.8}

/* ---------- articles ---------- */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.article-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:24px;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column;gap:10px;
}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(34,197,94,.4)}
.article-card span{font-size:12px;color:var(--green-dark);font-weight:700;letter-spacing:1px}
.article-card h3{font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.5}
.article-card p{font-size:13px;color:var(--ink-mute)}
.article-card .link-more{font-size:13px;color:var(--green-dark);font-weight:600;margin-top:auto}

/* ---------- form ---------- */
.form-wrap{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:flex-start;
}
.form-info h2{font-size:30px;font-weight:800;margin-bottom:16px;color:var(--ink)}
.form-info p{color:var(--ink-soft);font-size:15px;margin-bottom:22px}
.contact-list{display:flex;flex-direction:column;gap:14px}
.contact-list li{font-size:14px;color:var(--ink-soft);display:flex;gap:10px;align-items:flex-start}
.contact-list li b{color:var(--ink);font-weight:600;flex-shrink:0}
.contact-list a{color:var(--green-dark);font-weight:600}
.form-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow);
}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font-size:14px;font-family:inherit;color:var(--ink);background:#fbfefc;
  transition:border-color .2s,box-shadow .2s;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(34,197,94,.15);background:#fff;
}
.form-group textarea{resize:vertical;min-height:110px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-submit{
  width:100%;padding:14px;border-radius:10px;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--green),var(--green-dark));
  color:#fff;font-size:15px;font-weight:700;font-family:inherit;
  box-shadow:0 10px 24px rgba(34,197,94,.3);transition:transform .2s,box-shadow .2s;
}
.form-submit:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(34,197,94,.42)}

/* ---------- join / agent ---------- */
.join-banner{
  background:linear-gradient(135deg,#0f7a3d,#22c55e 60%,#4ade80);
  border-radius:22px;padding:52px 44px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  box-shadow:0 20px 50px rgba(22,163,74,.28);position:relative;overflow:hidden;
}
.join-banner::after{
  content:"";position:absolute;right:-60px;bottom:-80px;width:260px;height:260px;border-radius:50%;
  background:rgba(255,255,255,.12);
}
.join-banner h2{font-size:28px;font-weight:800;margin-bottom:10px}
.join-banner p{font-size:14.5px;color:rgba(255,255,255,.9);max-width:640px}
.join-banner .btn-white{
  background:#fff;color:var(--green-deep);padding:14px 28px;border-radius:999px;
  font-weight:700;font-size:15px;flex-shrink:0;transition:transform .2s,box-shadow .2s;
  box-shadow:0 10px 24px rgba(0,0,0,.12);position:relative;z-index:2;
}
.join-banner .btn-white:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(0,0,0,.18)}

/* ---------- footer ---------- */
.site-footer{
  background:#0d2416;color:#cfe7d8;padding:56px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand img{width:42px;height:auto}
.footer-brand strong{color:#fff;font-size:17px}
.footer-grid p{font-size:13.5px;color:#a8c9b4;line-height:1.8}
.footer-grid h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a,.footer-links span{font-size:13.5px;color:#a8c9b4;transition:color .2s}
.footer-links a:hover{color:#4ade80}
.footer-qr{display:flex;align-items:center;gap:12px;margin-top:14px}
.footer-qr img{width:88px;height:88px;object-fit:cover;border-radius:10px;border:2px solid rgba(255,255,255,.15)}
.footer-qr span{font-size:12.5px;color:#a8c9b4}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:12.5px;color:#8fb69e;
}
.footer-bottom a{color:#8fb69e;transition:color .2s}
.footer-bottom a:hover{color:#4ade80}

/* ---------- float & back to top ---------- */
.float-kefu{
  position:fixed;right:22px;bottom:96px;z-index:120;
  width:56px;height:56px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--green),var(--green-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 12px 28px rgba(34,197,94,.42);
  transition:transform .2s,box-shadow .2s;font-family:inherit;
}
.float-kefu:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 18px 36px rgba(34,197,94,.5)}
.float-kefu svg{width:26px;height:26px}
.kefu-pop{
  position:fixed;right:22px;bottom:164px;z-index:121;width:220px;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:18px;box-shadow:0 20px 50px rgba(0,0,0,.14);
  opacity:0;visibility:hidden;transform:translateY(12px);transition:.25s;
}
.kefu-pop.show{opacity:1;visibility:visible;transform:translateY(0)}
.kefu-pop p{font-size:13px;color:var(--ink-soft);margin-bottom:10px;text-align:center}
.kefu-pop img{width:100%;border-radius:10px}
.back-top{
  position:fixed;right:22px;bottom:26px;z-index:120;
  width:48px;height:48px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--green-dark);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 22px rgba(22,163,74,.16);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.25s;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--green-light)}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ---------- links section ---------- */
.friend-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.friend-links a{
  font-size:13.5px;color:var(--ink-soft);background:#fff;border:1px solid var(--line);
  padding:8px 16px;border-radius:999px;transition:.2s;
}
.friend-links a:hover{color:var(--green-deep);border-color:rgba(34,197,94,.4);background:var(--green-light);transform:translateY(-2px)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero h1{font-size:36px}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .cards-grid,.case-grid,.review-grid,.article-grid,.price-grid,.network-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .form-wrap{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .nav-links.open{
    display:flex;flex-direction:column;align-items:stretch;gap:2px;
    position:absolute;top:68px;left:0;right:0;background:#fff;
    padding:14px 20px 20px;border-bottom:1px solid var(--line);
    box-shadow:0 18px 30px rgba(0,0,0,.08);
  }
  .nav-links.open a{padding:12px 10px}
  .menu-toggle{display:flex}
  .nav-cta{display:none}
}
@media (max-width:768px){
  .hero{padding:52px 0 62px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:30px}
  .hero-visual{min-height:280px;order:-1}
  .orb{width:220px;height:220px}
  .orb::after{width:180px;height:180px}
  .orb-core strong{font-size:24px}
  .section{padding:56px 0}
  .section-head h2{font-size:26px}
  .about-text h2,.form-info h2{font-size:24px}
  .cards-grid,.case-grid,.review-grid,.article-grid,.price-grid,.network-grid,.scenario-grid,.flow{grid-template-columns:1fr}
  .join-banner{padding:36px 26px}
  .join-banner h2{font-size:22px}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .compare-head{flex-direction:column;align-items:flex-start}
}
@media (max-width:480px){
  .hero h1{font-size:26px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .btn{width:100%}
  .metrics-grid{grid-template-columns:1fr}
  .container{padding:0 16px}
}