*,*::before,*::after{box-sizing:border-box;}
:root{
  --brand:#0fa575;
  --brand-2:#18c08a;
  --brand-3:#8fe7c7;
  --brand-deep:#064232;
  --ink:#10261f;
  --ink-2:#3a574d;
  --ink-3:#6a857a;
  --mint:#e8f8f0;
  --mint-2:#d9f4e7;
  --line:rgba(15,165,117,.18);
  --white:#ffffff;
  --shadow-sm:0 2px 10px rgba(6,66,50,.06);
  --shadow:0 18px 36px -22px rgba(6,66,50,.45);
  --radius:16px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:15px;
  line-height:1.7;
  color:var(--ink);
  background-color:#f3fbf7;
  background-image:
    radial-gradient(1100px 720px at 5% 0%, rgba(24,192,138,.16), transparent 62%),
    radial-gradient(900px 620px at 98% 10%, rgba(143,231,199,.24), transparent 64%),
    radial-gradient(1000px 700px at 18% 88%, rgba(24,192,138,.12), transparent 66%),
    linear-gradient(180deg,#eaf9f2 0%,#f6fdfa 42%,#eef9f4 100%);
  background-repeat:no-repeat;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
section[id]{scroll-margin-top:82px;}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,253,250,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;max-width:180px;}
.brand .ai-page-logo{display:block;width:auto;max-width:126px;border-radius:6px;}
.brand-name{font-size:16px;font-weight:800;color:var(--brand-deep);letter-spacing:.5px;white-space:nowrap;}
.site-nav{flex:1 1 auto;display:flex;justify-content:center;}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap;}
.nav-links a{
  display:block;padding:9px 10px;font-size:13.5px;font-weight:600;color:var(--ink-2);
  border-radius:8px;white-space:nowrap;transition:color .2s ease,background-color .2s ease;
}
.nav-links a:hover{color:var(--brand);background:rgba(15,165,117,.09);}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.header-cta{padding:9px 18px;font-size:13.5px;}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:40px;height:40px;padding:0 10px;border-radius:10px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--brand-deep);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:999px;font-size:14.5px;font-weight:700;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .25s cubic-bezier(.2,.8,.3,1),box-shadow .25s ease,background-color .25s ease,color .25s ease;
}
.btn-primary{background:linear-gradient(135deg,#17bb86,#0a8f66);color:#fff;box-shadow:0 12px 26px -14px rgba(10,143,102,.9);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 32px -16px rgba(10,143,102,.95);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:rgba(255,255,255,.92);color:var(--brand-deep);border-color:rgba(15,165,117,.34);}
.btn-ghost:hover{background:#fff;transform:translateY(-2px);box-shadow:var(--shadow);}

/* ===== Section shell ===== */
.section{padding:66px 0;position:relative;}
.section--soft{background:rgba(255,255,255,.52);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:780px;margin:0 auto 42px;text-align:center;}
.sec-eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:800;letter-spacing:.12em;color:var(--brand);}
.sec-eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand-3));}
.sec-title{margin-top:12px;font-size:clamp(21px,3vw,31px);font-weight:800;line-height:1.36;color:var(--brand-deep);letter-spacing:-.3px;}
.sec-desc{margin-top:12px;color:var(--ink-2);font-size:15px;}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:54px 0 60px;}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(620px 400px at 78% 14%, rgba(24,192,138,.20), transparent 62%),
    radial-gradient(520px 360px at 6% 82%, rgba(143,231,199,.32), transparent 66%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:linear-gradient(rgba(15,165,117,.075) 1px,transparent 1px),linear-gradient(90deg,rgba(15,165,117,.075) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(72% 68% at 50% 38%,#000 18%,transparent 78%);
  mask-image:radial-gradient(72% 68% at 50% 38%,#000 18%,transparent 78%);
}
.hero .container{position:relative;z-index:1;}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:48px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:700;
  color:var(--brand-deep);background:rgba(255,255,255,.86);border:1px solid rgba(15,165,117,.3);
}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand-2);}
.hero h1{margin-top:18px;font-size:clamp(27px,4.4vw,44px);line-height:1.22;font-weight:900;color:var(--brand-deep);letter-spacing:-.8px;}
.hero-lead{margin-top:16px;font-size:15.5px;line-height:1.85;color:var(--ink-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-points{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:24px;}
.hero-points li{position:relative;padding-left:18px;font-size:13.5px;color:var(--ink-2);}
.hero-points li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--brand-2),var(--brand));
}
.hero-panel{
  position:relative;padding:22px;border-radius:22px;
  background:rgba(255,255,255,.9);border:1px solid rgba(15,165,117,.24);
  box-shadow:0 34px 64px -38px rgba(6,66,50,.62);
  animation:floatY 8s ease-in-out infinite;
}
@keyframes floatY{0%,100%{transform:translateY(0);}50%{transform:translateY(-7px);}}
.panel-head{display:flex;align-items:center;gap:9px;font-size:13.5px;font-weight:800;color:var(--brand-deep);}
.panel-dot{width:8px;height:8px;border-radius:50%;background:#22c55e;animation:pulse 2.6s ease-out infinite;}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(34,197,94,.55);}70%{box-shadow:0 0 0 11px rgba(34,197,94,0);}100%{box-shadow:0 0 0 0 rgba(34,197,94,0);}}
.chip-grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.chip{
  font-size:12.5px;font-weight:600;color:#0a6b4d;padding:5px 11px;border-radius:8px;
  background:linear-gradient(180deg,#eafaf2,#ddf5ea);border:1px solid rgba(15,165,117,.22);
  transition:transform .22s ease,box-shadow .22s ease;
}
.chip:hover{transform:translateY(-2px);box-shadow:0 8px 16px -10px rgba(15,165,117,.9);}
.panel-foot{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:16px;border-top:1px dashed rgba(15,165,117,.28);}
.panel-foot span{font-size:12px;font-weight:700;color:var(--brand);background:rgba(15,165,117,.09);border-radius:6px;padding:4px 10px;}

/* ===== Stats ===== */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:46px;}
.stat-card{
  position:relative;overflow:hidden;padding:18px 20px;border-radius:14px;
  background:rgba(255,255,255,.92);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.stat-card::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:linear-gradient(90deg,#18c08a,#a6eed6);}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.stat-card strong{display:block;font-size:26px;font-weight:900;line-height:1.25;color:var(--brand-deep);letter-spacing:-.5px;}
.stat-card span{font-size:13.5px;color:var(--ink-3);}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:44px;align-items:start;}
.about-copy h3{font-size:19px;font-weight:800;color:var(--brand-deep);margin-bottom:12px;}
.about-copy p{color:var(--ink-2);font-size:14.8px;margin-bottom:14px;}
.about-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.about-tags span{font-size:12.5px;font-weight:700;color:var(--brand-deep);background:rgba(15,165,117,.1);border:1px solid rgba(15,165,117,.2);padding:5px 12px;border-radius:999px;}
.ability-list{display:grid;gap:12px;}
.ability-list li{
  display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:14px;
  background:rgba(255,255,255,.92);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.ability-list li:hover{transform:translateX(4px);box-shadow:var(--shadow);border-color:rgba(15,165,117,.36);}
.ab-dot{flex:0 0 auto;width:10px;height:10px;margin-top:7px;border-radius:3px;background:linear-gradient(135deg,#18c08a,#0a8f66);transform:rotate(45deg);}
.ability-list h4{font-size:14.8px;font-weight:800;color:var(--brand-deep);margin-bottom:2px;}
.ability-list p{font-size:13.5px;color:var(--ink-2);line-height:1.65;}

/* ===== Service cards ===== */
.card-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.service-card{
  position:relative;padding:22px 20px;border-radius:16px;
  background:rgba(255,255,255,.94);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .28s cubic-bezier(.2,.8,.3,1),box-shadow .28s ease,border-color .28s ease;
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(15,165,117,.4);}
.service-mark{display:block;width:34px;height:34px;border-radius:10px;margin-bottom:14px;background:linear-gradient(135deg,#18c08a,#8fe7c7);position:relative;}
.service-mark::after{content:"";position:absolute;inset:9px;border-radius:4px;background:rgba(255,255,255,.85);}
.service-card h3{font-size:16px;font-weight:800;color:var(--brand-deep);margin-bottom:8px;}
.service-card p{font-size:13.8px;color:var(--ink-2);line-height:1.72;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px;padding-top:26px;border-top:1px dashed rgba(15,165,117,.3);}
.tag-cloud span{
  font-size:13px;font-weight:600;color:#0a6b4d;background:rgba(255,255,255,.9);
  border:1px solid rgba(15,165,117,.24);padding:6px 13px;border-radius:999px;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.tag-cloud span:hover{transform:translateY(-2px);background:#fff;box-shadow:0 8px 18px -12px rgba(15,165,117,.9);}

/* ===== Flow ===== */
.flow-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;}
.flow-item{
  position:relative;padding:20px 16px 18px;border-radius:14px;
  background:rgba(255,255,255,.94);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.flow-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.flow-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:9px;font-size:13px;font-weight:900;
  color:#fff;background:linear-gradient(135deg,#18c08a,#0a8f66);margin-bottom:12px;
}
.flow-item h3{font-size:14.8px;font-weight:800;color:var(--brand-deep);margin-bottom:6px;}
.flow-item p{font-size:13.2px;color:var(--ink-2);line-height:1.68;}
.shot-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:32px;}
.shot{
  margin:0;padding:10px;border-radius:16px;aspect-ratio:16/10;overflow:hidden;
  background:linear-gradient(180deg,#eafaf3,#e0f6ec);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  transition:box-shadow .28s ease,transform .28s ease;
}
.shot:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.shot .ai-page-image{display:block;width:auto;max-width:100%;max-height:100%;height:auto;object-fit:contain;border-radius:9px;}

/* ===== Solutions ===== */
.solution-card{
  padding:20px;border-radius:16px;background:rgba(255,255,255,.94);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.solution-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(15,165,117,.4);}
.solution-card h3{font-size:15.6px;font-weight:800;color:var(--brand-deep);margin-bottom:8px;}
.solution-card p{font-size:13.6px;color:var(--ink-2);line-height:1.7;margin-bottom:12px;}
.solution-tags{display:flex;flex-wrap:wrap;gap:7px;}
.solution-tags span{font-size:12px;font-weight:700;color:var(--brand);background:rgba(15,165,117,.09);border-radius:6px;padding:3px 9px;}

/* ===== Network band ===== */
.network-band{
  margin-top:36px;padding:24px;border-radius:18px;
  background:linear-gradient(135deg,rgba(255,255,255,.96),rgba(232,248,240,.9));
  border:1px solid rgba(15,165,117,.26);box-shadow:var(--shadow-sm);
}
.network-band h3{font-size:16.5px;font-weight:800;color:var(--brand-deep);margin-bottom:6px;}
.network-band > p{font-size:13.8px;color:var(--ink-2);margin-bottom:18px;}
.network-list{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;}
.network-list div{padding:13px 14px;border-radius:12px;background:#fff;border:1px solid var(--line);transition:transform .24s ease,box-shadow .24s ease;}
.network-list div:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.network-list strong{display:block;font-size:13.8px;color:var(--brand-deep);font-weight:800;margin-bottom:2px;}
.network-list span{font-size:12.5px;color:var(--ink-3);}

/* ===== Process ===== */
.step-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.step-card{
  position:relative;overflow:hidden;padding:22px;border-radius:16px;
  background:rgba(255,255,255,.94);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .26s ease,box-shadow .26s ease;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.step-num{display:block;font-size:34px;font-weight:900;line-height:1;color:rgba(15,165,117,.2);letter-spacing:-1px;margin-bottom:8px;}
.step-card h3{font-size:16px;font-weight:800;color:var(--brand-deep);margin-bottom:8px;}
.step-card p{font-size:13.8px;color:var(--ink-2);line-height:1.72;}

/* ===== Cases ===== */
.case-card{
  border-radius:16px;overflow:hidden;background:rgba(255,255,255,.95);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .28s ease,box-shadow .28s ease;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.case-media{
  aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;padding:10px;
  background:linear-gradient(160deg,#e9faf2,#dff5ea);border-bottom:1px solid var(--line);
}
.case-media img{display:block;width:auto;max-width:100%;max-height:100%;height:auto;object-fit:contain;border-radius:8px;}
.case-body{padding:18px 18px 20px;}
.case-body h3{font-size:15.6px;font-weight:800;color:var(--brand-deep);margin-bottom:6px;}
.case-body p{font-size:13.5px;color:var(--ink-2);line-height:1.7;}

/* ===== Reviews ===== */
.review-card{
  display:flex;flex-direction:column;gap:12px;height:100%;
  padding:20px;border-radius:16px;background:rgba(255,255,255,.95);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .26s ease,box-shadow .26s ease;
}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);}
.review-head{display:flex;align-items:center;gap:11px;}
.avatar{
  flex:0 0 auto;width:42px;height:42px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#fff;background:linear-gradient(135deg,#18c08a,#0a8f66);
}
.review-head strong{display:block;font-size:14.5px;color:var(--brand-deep);font-weight:800;}
.review-head em{display:block;font-size:12.5px;color:var(--ink-3);font-style:normal;}
.review-card p{font-size:13.8px;color:var(--ink-2);line-height:1.78;}

/* ===== Review scoring ===== */
.score-panel{
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:26px;align-items:stretch;
  margin-bottom:28px;
}
.score-card{
  padding:26px;border-radius:18px;text-align:center;
  background:linear-gradient(150deg,#0a8f66,#12b383 55%,#0a7a56);
  color:#fff;box-shadow:0 26px 50px -30px rgba(10,143,102,.9);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
}
.score-card .stars{font-size:22px;letter-spacing:3px;color:#ffe9a8;}
.score-card .score-num{font-size:48px;font-weight:900;line-height:1.05;letter-spacing:-2px;}
.score-card .score-num small{font-size:16px;font-weight:700;letter-spacing:0;opacity:.86;}
.score-card .score-label{font-size:13.5px;opacity:.92;}
.score-card .score-tag{margin-top:6px;font-size:12.5px;font-weight:800;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.4);border-radius:999px;padding:4px 14px;}
.score-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
.score-points div{
  padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.95);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .24s ease,box-shadow .24s ease;
}
.score-points div:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.score-points strong{display:block;font-size:13.8px;color:var(--brand-deep);font-weight:800;margin-bottom:2px;}
.score-points span{font-size:12.8px;color:var(--ink-3);line-height:1.6;}

/* ===== Table ===== */
.table-wrap{
  overflow-x:auto;border-radius:16px;border:1px solid var(--line);
  background:rgba(255,255,255,.96);box-shadow:var(--shadow-sm);
  -webkit-overflow-scrolling:touch;
}
table{width:100%;min-width:760px;border-collapse:collapse;font-size:13.8px;}
thead th{
  padding:14px 16px;text-align:left;white-space:nowrap;
  font-weight:800;color:var(--brand-deep);
  background:linear-gradient(180deg,#e9f9f1,#dcf5ea);
  border-bottom:1px solid rgba(15,165,117,.22);
}
tbody td{padding:13px 16px;color:var(--ink-2);border-bottom:1px solid rgba(15,165,117,.12);vertical-align:top;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover td{background:rgba(232,248,240,.6);}
td.col-brand{color:var(--brand-deep);font-weight:700;background:rgba(232,248,240,.55);}
tbody tr:hover td.col-brand{background:rgba(216,244,231,.85);}
.table-note{margin-top:12px;font-size:12.8px;color:var(--ink-3);}

/* ===== Pricing ===== */
.price-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;}
.price-card{
  padding:20px 16px;border-radius:14px;background:rgba(255,255,255,.95);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.price-card h3{font-size:14.6px;font-weight:800;color:var(--brand-deep);margin-bottom:6px;}
.price-card p{font-size:13px;color:var(--ink-2);line-height:1.66;}

/* ===== Support ===== */
.support-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:32px;}
.support-card{
  padding:16px 18px;border-radius:14px;background:rgba(255,255,255,.95);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .24s ease,box-shadow .24s ease;
}
.support-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.support-card h3{font-size:14.4px;font-weight:800;color:var(--brand-deep);margin-bottom:4px;}
.support-card p{font-size:12.8px;color:var(--ink-3);line-height:1.62;}

/* ===== FAQ ===== */
.faq-list{display:grid;gap:12px;max-width:960px;margin:0 auto;}
.faq-item{
  background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:14px;
  padding:0 18px;transition:box-shadow .25s ease,border-color .25s ease;
}
.faq-item[open]{box-shadow:var(--shadow);border-color:rgba(15,165,117,.38);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:16px 32px 16px 0;font-size:14.8px;font-weight:700;color:var(--brand-deep);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:4px;top:50%;
  width:9px;height:9px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:translateY(-72%) rotate(45deg);transition:transform .3s ease;
}
.faq-item[open] summary::after{transform:translateY(-28%) rotate(-135deg);}
.faq-body{padding:0 0 16px;font-size:13.8px;color:var(--ink-2);line-height:1.78;}

/* ===== Insights ===== */
.insight-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:28px;align-items:start;}
.article-list{display:grid;gap:10px;}
.article-list li a{
  display:flex;align-items:center;gap:14px;padding:15px 16px;border-radius:13px;
  background:rgba(255,255,255,.95);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.article-list li a:hover{transform:translateX(4px);box-shadow:var(--shadow);border-color:rgba(15,165,117,.4);}
.art-index{flex:0 0 auto;font-size:13px;font-weight:900;color:var(--brand);background:rgba(15,165,117,.1);border-radius:7px;padding:3px 8px;}
.art-body{flex:1 1 auto;min-width:0;}
.art-body strong{display:block;font-size:14.4px;font-weight:800;color:var(--brand-deep);}
.art-body span{display:block;font-size:12.6px;color:var(--ink-3);margin-top:2px;}
.art-arrow{flex:0 0 auto;font-size:15px;font-weight:800;color:var(--brand);}
.article-slot{display:none;}
.wiki-panel{
  padding:22px;border-radius:16px;background:rgba(255,255,255,.95);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.wiki-panel h3{font-size:15.4px;font-weight:800;color:var(--brand-deep);margin-bottom:6px;}
.wiki-panel > p{font-size:13.4px;color:var(--ink-2);line-height:1.7;margin-bottom:16px;}

/* ===== Join ===== */
.join-wrap{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:34px;align-items:center;
  padding:34px;border-radius:20px;
  background:linear-gradient(135deg,rgba(255,255,255,.96),rgba(226,248,238,.92));
  border:1px solid rgba(15,165,117,.28);box-shadow:var(--shadow-sm);
}
.join-copy h2{font-size:clamp(20px,2.6vw,27px);font-weight:900;color:var(--brand-deep);line-height:1.34;letter-spacing:-.4px;}
.join-copy p{margin-top:12px;font-size:14.4px;color:var(--ink-2);line-height:1.8;}
.join-copy .btn{margin-top:22px;}
.join-list{display:grid;gap:10px;}
.join-list li{
  display:flex;gap:11px;align-items:flex-start;padding:13px 15px;border-radius:12px;
  background:#fff;border:1px solid var(--line);
  transition:transform .24s ease,box-shadow .24s ease;
}
.join-list li:hover{transform:translateX(4px);box-shadow:var(--shadow);}
.join-list strong{display:block;font-size:13.8px;font-weight:800;color:var(--brand-deep);}
.join-list span{font-size:12.8px;color:var(--ink-3);line-height:1.6;}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:28px;align-items:start;}
.form-panel{
  padding:26px;border-radius:18px;background:rgba(255,255,255,.97);
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.form-panel h3{font-size:17px;font-weight:800;color:var(--brand-deep);margin-bottom:4px;}
.form-panel > p{font-size:13.4px;color:var(--ink-3);margin-bottom:20px;}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field-full{grid-column:1 / -1;}
.field label{font-size:13.2px;font-weight:700;color:var(--brand-deep);}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;font-size:14.4px;font-family:inherit;
  color:var(--ink);background:#fbfefc;border:1px solid rgba(15,165,117,.3);
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,165,117,.16);
}
.field textarea{min-height:112px;resize:vertical;}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.form-actions .hint{font-size:12.4px;color:var(--ink-3);}
.contact-panel{
  display:grid;gap:14px;padding:24px;border-radius:18px;
  background:linear-gradient(160deg,rgba(255,255,255,.98),rgba(232,248,240,.94));
  border:1px solid rgba(15,165,117,.26);box-shadow:var(--shadow-sm);
}
.contact-panel h3{font-size:16px;font-weight:800;color:var(--brand-deep);}
.contact-list{display:grid;gap:10px;}
.contact-list li{
  display:flex;justify-content:space-between;gap:12px;align-items:baseline;
  padding:9px 12px;border-radius:10px;background:#fff;border:1px solid var(--line);
  font-size:13.4px;
}
.contact-list li b{font-weight:800;color:var(--brand-deep);flex:0 0 auto;}
.contact-list li span{color:var(--ink-2);word-break:break-all;text-align:right;}
.qr-box{display:flex;align-items:center;gap:14px;padding:14px;border-radius:12px;background:#fff;border:1px solid var(--line);}
.qr-box img{display:block;width:110px;height:auto;min-height:80px;border-radius:8px;background:linear-gradient(160deg,#eafaf3,#dcf5ea);}
.qr-box div strong{display:block;font-size:13.8px;font-weight:800;color:var(--brand-deep);}
.qr-box div span{display:block;font-size:12.6px;color:var(--ink-3);line-height:1.6;}

/* ===== Footer ===== */
.site-footer{
  margin-top:0;background:#06382a;color:#cfe9e0;padding:44px 0 20px;
}
.footer-top{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.85fr) minmax(0,1fr);gap:32px;align-items:start;}
.footer-brand .ai-page-logo{display:block;width:auto;max-width:130px;border-radius:6px;background:rgba(255,255,255,.06);padding:4px;}
.footer-brand p{margin-top:12px;font-size:13.6px;color:#a9d6c7;line-height:1.75;max-width:320px;}
.footer-site{display:inline-block;margin-top:12px;font-size:13.6px;font-weight:800;color:#8fe7c7;border-bottom:1px dashed rgba(143,231,199,.6);padding-bottom:1px;}
.footer-title{font-size:14px;font-weight:800;color:#ffffff;margin-bottom:12px;}
.footer-nav ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 16px;}
.footer-nav a{font-size:13.4px;color:#a9d6c7;transition:color .2s ease;}
.footer-nav a:hover{color:#8fe7c7;}
.footer-links ul{display:flex;flex-wrap:wrap;gap:8px;}
.footer-links a{
  display:inline-block;font-size:12.8px;color:#a9d6c7;padding:4px 11px;border-radius:999px;
  border:1px solid rgba(143,231,199,.28);transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.footer-links a:hover{color:#06382a;background:#8fe7c7;border-color:#8fe7c7;}
.footer-bottom{
  margin-top:30px;padding-top:16px;border-top:1px solid rgba(143,231,199,.2);
  font-size:12.8px;color:#8fb9ac;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;
}

/* ===== Float tools ===== */
.float-tools{position:fixed;right:16px;bottom:20px;z-index:60;display:flex;flex-direction:column;align-items:flex-end;gap:10px;}
.back-top{
  width:52px;height:52px;border-radius:50%;border:1px solid rgba(15,165,117,.3);
  background:#fff;color:var(--brand-deep);font-size:12.5px;font-weight:800;cursor:pointer;
  box-shadow:0 10px 24px -16px rgba(6,66,50,.9);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background-color .25s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--mint);}
.float-service{position:relative;}
.float-btn{
  width:52px;height:52px;border-radius:50%;border:none;cursor:pointer;
  font-size:12.5px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,#18c08a,#0a8f66);
  box-shadow:0 12px 26px -14px rgba(10,143,102,.95);
  transition:transform .25s ease,box-shadow .25s ease;
}
.float-btn:hover{transform:translateY(-2px);box-shadow:0 18px 30px -16px rgba(10,143,102,.95);}
.service-pop{
  position:absolute;right:0;bottom:64px;width:196px;padding:14px;
  border-radius:14px;background:#fff;border:1px solid var(--line);
  box-shadow:0 24px 46px -26px rgba(6,66,50,.7);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.service-pop.open{opacity:1;visibility:visible;transform:translateY(0);}
.service-pop img{display:block;width:100%;height:auto;min-height:90px;border-radius:9px;background:linear-gradient(160deg,#eafaf3,#dcf5ea);}
.service-pop p{margin-top:8px;font-size:12.6px;color:var(--ink-2);line-height:1.6;text-align:center;}
.service-pop p strong{color:var(--brand-deep);}

/* ===== Reveal ===== */
body.js-enabled [data-reveal]{opacity:0;transform:translateY(18px);}
body.js-enabled [data-reveal].in{
  opacity:1;transform:none;
  transition:opacity .65s ease,transform .65s cubic-bezier(.2,.8,.3,1);
}

/* ===== Responsive ===== */
@media (max-width:1080px){
  .site-nav{
    position:absolute;top:100%;left:0;right:0;display:none;
    background:#ffffff;border-bottom:1px solid var(--line);
    box-shadow:0 22px 40px -30px rgba(6,66,50,.7);
    max-height:calc(100vh - 68px);overflow-y:auto;
  }
  .site-nav.open{display:block;}
  .nav-links{flex-direction:column;align-items:stretch;padding:8px 16px 14px;}
  .nav-links a{padding:12px 8px;font-size:14.4px;border-radius:0;border-bottom:1px solid rgba(15,165,117,.1);}
  .nav-toggle{display:flex;}
  .header-inner{position:relative;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-panel{animation:none;}
  .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .price-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .support-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .network-list{grid-template-columns:repeat(3,minmax(0,1fr));}
  .footer-top{grid-template-columns:1fr 1fr;}
  .about-grid,.insight-grid,.contact-grid,.join-wrap{grid-template-columns:1fr;gap:26px;}
  .score-panel{grid-template-columns:1fr;}
}
@media (max-width:820px){
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .step-grid{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .score-points{grid-template-columns:1fr;}
  .shot-grid{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .section{padding:46px 0;}
  .hero{padding:38px 0 44px;}
  .brand-name{font-size:15px;}
  .brand .ai-page-logo{max-width:100px;}
  .header-cta{display:none;}
  .card-grid-3,.stat-grid,.flow-grid,.price-grid,.support-grid,.network-list{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;gap:26px;}
  .footer-nav ul{grid-template-columns:repeat(2,minmax(0,1fr));}
  .join-wrap{padding:22px;}
  .form-panel,.contact-panel{padding:20px;}
  .float-tools{right:12px;bottom:14px;}
  .back-top,.float-btn{width:46px;height:46px;font-size:12px;}
  .service-pop{width:174px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  body.js-enabled [data-reveal]{opacity:1;transform:none;}
}