:root{
  --teal-900:#07332f;
  --teal-800:#0a4a45;
  --teal-700:#0f6b63;
  --teal-600:#0d9488;
  --teal-500:#14b8a6;
  --cyan-400:#22d3ee;
  --ink:#0c2b28;
  --ink-2:#3a5a56;
  --ink-3:#6a8582;
  --line:rgba(13,148,136,.16);
  --card:#ffffff;
  --radius:18px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  background-color:#f3fbfa;
  background-image:
    radial-gradient(900px 520px at 12% -6%, rgba(34,211,238,.16), transparent 62%),
    radial-gradient(760px 460px at 88% 4%, rgba(13,148,136,.13), transparent 64%),
    radial-gradient(800px 500px at 50% 100%, rgba(20,184,166,.10), transparent 68%),
    linear-gradient(180deg,#eefaf9 0%, #f6fdfc 38%, #f1faf9 100%);
  background-repeat:no-repeat;
}
img{max-width:100%;}
a{color:var(--teal-700);}
.container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 20px;
}
section{scroll-margin-top:86px;}
.section{padding:68px 0;}
.section-sm{padding:52px 0;}
.section-head{max-width:780px;margin:0 auto 36px;text-align:center;}
.kicker{
  display:inline-block;
  font-size:12.5px;
  letter-spacing:.16em;
  font-weight:700;
  color:var(--teal-700);
  background:rgba(20,184,166,.10);
  border:1px solid rgba(13,148,136,.18);
  border-radius:999px;
  padding:5px 14px;
}
h2{
  font-size:clamp(23px,3.2vw,33px);
  line-height:1.32;
  margin:16px 0 12px;
  color:var(--teal-900);
  letter-spacing:-.01em;
}
h3{color:var(--teal-900);font-size:18px;margin:0 0 8px;line-height:1.45;}
.section-head p{margin:0;color:var(--ink-2);font-size:15.5px;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:999px;
  font-size:15.5px;
  font-weight:600;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease, box-shadow .25s ease, background .25s ease, color .2s ease;
}
.btn:active{transform:translateY(1px);}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#0f766e 0%,#0e7490 100%);
  box-shadow:0 12px 26px rgba(9,80,74,.24);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(9,80,74,.30);}
.btn-ghost{
  color:var(--teal-700);
  background:rgba(255,255,255,.85);
  border-color:rgba(13,148,136,.28);
}
.btn-ghost:hover{background:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(9,80,74,.14);}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(244,252,251,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(13,148,136,.14);
}
.nav-wrap{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:68px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  flex:0 0 auto;
}
.logo-box{width:132px;flex:0 0 auto;display:block;}
.logo-box .ai-page-logo{display:block;width:100%;height:auto;}
.nav-links{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:0;
  flex-wrap:wrap;
}
.nav-links a{
  display:inline-block;
  padding:8px 11px;
  border-radius:10px;
  color:#20504c;
  text-decoration:none;
  font-size:14.5px;
  font-weight:500;
  transition:color .2s ease, background .2s ease;
}
.nav-links a:hover,
.nav-links a:focus-visible{
  background:rgba(13,148,136,.10);
  color:#0b6b63;
}
.nav-links .nav-cta{
  margin-left:12px;
  padding:9px 20px;
  border-radius:999px;
  color:#fff;
  background:linear-gradient(135deg,#0f766e,#0e7490);
  box-shadow:0 8px 20px rgba(9,80,74,.20);
}
.nav-links .nav-cta:hover{color:#fff;background:linear-gradient(135deg,#0d6a63,#0c6b85);}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid rgba(13,148,136,.24);
  background:#fff;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
  padding:0;
  flex:0 0 auto;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#0f6b63;border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============ hero ============ */
.hero{
  position:relative;
  overflow:hidden;
  padding:0;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(560px 320px at 82% 18%, rgba(34,211,238,.22), transparent 68%),
    radial-gradient(500px 300px at 8% 78%, rgba(20,184,166,.18), transparent 70%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:46px;
  align-items:center;
  padding:66px 0 58px;
}
.hero-copy .kicker{margin-bottom:6px;}
.hero h1{
  font-size:clamp(28px,4.4vw,46px);
  line-height:1.22;
  letter-spacing:-.02em;
  color:var(--teal-900);
  margin:16px 0 16px;
}
.hero-lead{
  margin:0 0 24px;
  font-size:16.5px;
  color:var(--ink-2);
  max-width:620px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.hero-note{
  margin:22px 0 0;
  font-size:13.5px;
  color:var(--ink-3);
  letter-spacing:.02em;
}
.hero-panel{
  background:rgba(255,255,255,.86);
  border:1px solid rgba(13,148,136,.20);
  border-radius:22px;
  padding:24px 22px;
  box-shadow:0 22px 48px rgba(9,80,74,.12);
  backdrop-filter:blur(8px);
}
.hp-head{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:13.5px;
  font-weight:600;
  color:var(--teal-700);
  letter-spacing:.06em;
  margin-bottom:16px;
}
.hp-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--teal-500);
  box-shadow:0 0 0 4px rgba(20,184,166,.18);
  animation:pulseDot 2.4s ease-in-out infinite;
}
@keyframes pulseDot{
  0%,100%{box-shadow:0 0 0 3px rgba(20,184,166,.16);}
  50%{box-shadow:0 0 0 7px rgba(20,184,166,.06);}
}
.hp-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.hp-item{
  background:linear-gradient(160deg,rgba(240,253,251,.95),rgba(238,250,255,.9));
  border:1px solid rgba(13,148,136,.12);
  border-radius:14px;
  padding:14px 14px;
}
.hp-item strong{
  display:block;
  font-size:23px;
  line-height:1.2;
  color:var(--teal-800);
  letter-spacing:-.02em;
}
.hp-item strong .unit{font-size:13px;font-weight:600;margin-left:2px;color:var(--teal-600);}
.hp-item span{display:block;font-size:12.5px;color:var(--ink-3);margin-top:4px;}
.hp-note{
  margin:16px 0 0;
  font-size:13px;
  color:var(--ink-3);
  line-height:1.7;
}

/* ============ about ============ */
.about-layout{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:38px;
  align-items:start;
}
.about-text p{color:var(--ink-2);margin:0 0 16px;font-size:15.5px;}
.about-list{
  list-style:none;
  margin:22px 0 0;
  padding:0;
  display:grid;
  gap:12px;
}
.about-list li{
  display:flex;
  gap:11px;
  align-items:flex-start;
  font-size:15px;
  color:var(--ink-2);
}
.tick{
  flex:0 0 auto;
  width:20px;height:20px;
  margin-top:4px;
  border-radius:50%;
  background:rgba(20,184,166,.14);
  color:var(--teal-700);
  font-size:12px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
}
.about-media{
  display:grid;
  gap:14px;
  grid-template-columns:1fr 1fr;
}
.media-box{
  border-radius:16px;
  overflow:hidden;
  border:1px solid rgba(13,148,136,.16);
  background:linear-gradient(140deg,#e5f8f6,#e8f6fb);
  aspect-ratio:4/3;
}
.media-box.wide{grid-column:1 / -1;aspect-ratio:16/8;}
.media-box img{width:100%;height:100%;object-fit:cover;display:block;}

/* ============ cards ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  box-shadow:0 10px 26px rgba(9,80,74,.06);
  transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:0 20px 40px rgba(9,80,74,.12);
  border-color:rgba(13,148,136,.34);
}
.card p{margin:0;color:var(--ink-2);font-size:14.5px;}
.card-tag{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  color:var(--teal-700);
  background:rgba(20,184,166,.12);
  border-radius:999px;
  padding:3px 11px;
  margin-bottom:12px;
}
.card-icon{
  width:42px;height:42px;
  border-radius:12px;
  background:linear-gradient(135deg,rgba(13,148,136,.16),rgba(34,211,238,.18));
  color:var(--teal-700);
  font-weight:700;
  font-size:15px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:14px;
}

/* ============ tags ============ */
.tag-cloud{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.tag{
  display:inline-block;
  font-size:13.5px;
  color:#20504c;
  background:rgba(255,255,255,.9);
  border:1px solid rgba(13,148,136,.22);
  border-radius:999px;
  padding:7px 15px;
  transition:background .2s ease, color .2s ease, transform .2s ease;
}
.tag:hover{background:rgba(20,184,166,.14);color:var(--teal-800);transform:translateY(-2px);}

/* ============ timeline ============ */
.timeline{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  margin-top:8px;
}
.tl-item{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  padding:22px 20px;
  transition:transform .25s ease, box-shadow .25s ease;
}
.tl-item:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(9,80,74,.10);}
.tl-num{
  width:34px;height:34px;
  border-radius:10px;
  background:linear-gradient(135deg,#0f766e,#0e7490);
  color:#fff;
  font-size:14px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:14px;
}
.tl-item h3{font-size:16.5px;}
.tl-item p{margin:0;font-size:14px;color:var(--ink-2);}

/* ============ steps ============ */
.steps{display:grid;gap:14px;}
.step-row{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:18px;
  align-items:start;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  padding:20px 22px;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.step-row:hover{border-color:rgba(13,148,136,.34);box-shadow:0 14px 30px rgba(9,80,74,.09);}
.step-idx{
  font-size:15px;
  font-weight:700;
  color:var(--teal-600);
  letter-spacing:.04em;
  padding-top:2px;
}
.step-row h3{font-size:16.5px;margin-bottom:4px;}
.step-row p{margin:0;font-size:14.5px;color:var(--ink-2);}

/* ============ case ============ */
.case-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 10px 26px rgba(9,80,74,.06);
  transition:transform .25s ease, box-shadow .25s ease;
}
.case-card:hover{transform:translateY(-5px);box-shadow:0 22px 44px rgba(9,80,74,.13);}
.case-media{
  aspect-ratio:16/10;
  background:linear-gradient(140deg,#e5f8f6,#e8f6fb);
  overflow:hidden;
}
.case-media img{width:100%;height:100%;object-fit:cover;display:block;}
.case-body{padding:20px 22px 24px;}
.case-body p{margin:0;font-size:14.5px;color:var(--ink-2);}

/* ============ review ============ */
.score-card{
  display:grid;
  grid-template-columns:280px 1fr;
  gap:28px;
  align-items:center;
  background:linear-gradient(135deg,#07332f 0%,#0c5a54 55%,#0a5566 100%);
  border-radius:22px;
  padding:32px 34px;
  color:#e7fbf8;
  box-shadow:0 22px 48px rgba(7,51,47,.26);
}
.score-left{text-align:center;border-right:1px solid rgba(255,255,255,.16);padding-right:12px;}
.stars{font-size:22px;letter-spacing:4px;color:#5eead4;}
.score-num{
  font-size:52px;
  font-weight:800;
  line-height:1.1;
  margin:8px 0 4px;
  color:#ffffff;
  letter-spacing:-.03em;
}
.score-num span{font-size:17px;font-weight:600;color:#9fe6dd;margin-left:2px;}
.score-left p{margin:0;font-size:14px;color:#bde9e3;}
.score-right ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px 22px;
}
.score-right li{
  position:relative;
  padding-left:20px;
  font-size:14.5px;
  color:#dff6f2;
}
.score-right li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:7px;height:7px;
  border-radius:50%;
  background:#5eead4;
}

/* ============ table ============ */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:16px;
  background:#fff;
  box-shadow:0 10px 26px rgba(9,80,74,.06);
  margin-top:26px;
  -webkit-overflow-scrolling:touch;
}
table{width:100%;border-collapse:collapse;min-width:740px;font-size:14.5px;}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid rgba(13,148,136,.10);vertical-align:top;}
th{
  background:rgba(13,148,136,.07);
  color:var(--teal-800);
  font-weight:700;
  font-size:14px;
  white-space:nowrap;
}
td{color:var(--ink-2);}
td strong{color:var(--teal-800);}
tbody tr:last-child td{border-bottom:0;}
tbody tr:hover{background:rgba(34,211,238,.06);}
.table-note{
  margin:14px 0 0;
  font-size:13px;
  color:var(--ink-3);
}

/* ============ form ============ */
.form-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px 28px;
  box-shadow:0 14px 34px rgba(9,80,74,.09);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{display:block;}
.field span{
  display:block;
  font-size:13.5px;
  font-weight:600;
  color:var(--teal-800);
  margin-bottom:7px;
}
.field input,
.field select,
.field textarea{
  width:100%;
  font:inherit;
  font-size:14.5px;
  color:var(--ink);
  background:#f7fdfc;
  border:1px solid rgba(13,148,136,.22);
  border-radius:12px;
  padding:11px 14px;
  transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field input::placeholder,
.field textarea::placeholder{color:#9ab3b0;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  background:#fff;
  border-color:var(--teal-500);
  box-shadow:0 0 0 3px rgba(20,184,166,.16);
}
.field textarea{resize:vertical;min-height:118px;}
.field-full{grid-column:1 / -1;}
.form-foot{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  margin-top:22px;
}
.form-foot p{margin:0;font-size:13px;color:var(--ink-3);}

/* ============ faq ============ */
.faq-list{max-width:920px;margin:0 auto;}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.faq-item.open{border-color:rgba(13,148,136,.38);box-shadow:0 12px 28px rgba(9,80,74,.09);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 20px;
  background:none;
  border:0;
  font:inherit;
  font-weight:600;
  font-size:15.5px;
  color:var(--teal-900);
  text-align:left;
  cursor:pointer;
}
.faq-q:focus-visible{outline:2px solid var(--teal-500);outline-offset:-3px;}
.faq-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  border-radius:50%;
  background:rgba(20,184,166,.14);
  color:var(--teal-700);
  font-size:15px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .3s ease, background .3s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(13,148,136,.22);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-item.open .faq-a{max-height:340px;}
.faq-a p{margin:0;padding:0 20px 18px;font-size:14.5px;color:var(--ink-2);}

/* ============ knowledge / news ============ */
.knowledge-layout{
  display:grid;
  grid-template-columns:1fr 1.2fr;
  gap:24px;
  align-items:start;
}
.panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px 24px;
  box-shadow:0 10px 26px rgba(9,80,74,.06);
}
.panel h3{font-size:17px;margin-bottom:16px;}
.wiki-item{
  padding:13px 0;
  border-bottom:1px dashed rgba(13,148,136,.18);
}
.wiki-item:last-child{border-bottom:0;padding-bottom:0;}
.wiki-item strong{display:block;font-size:15px;color:var(--teal-800);margin-bottom:3px;}
.wiki-item p{margin:0;font-size:13.8px;color:var(--ink-2);}
.news-list{list-style:none;margin:0;padding:0;}
.news-list li{border-bottom:1px dashed rgba(13,148,136,.18);}
.news-list li:last-child{border-bottom:0;}
.news-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:13px 0;
  font-size:14.8px;
  color:var(--teal-800);
  text-decoration:none;
  transition:color .2s ease, padding-left .2s ease;
}
.news-list a:hover{color:var(--teal-600);padding-left:6px;}
.news-list .arrow{color:var(--teal-500);font-size:15px;flex:0 0 auto;}

/* ============ contact ============ */
.contact-layout{
  display:grid;
  grid-template-columns:1.3fr .7fr;
  gap:24px;
  align-items:start;
}
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}
.contact-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  padding:16px 18px;
}
.contact-item span{display:block;font-size:12.8px;color:var(--ink-3);margin-bottom:4px;}
.contact-item strong{display:block;font-size:15px;color:var(--teal-800);word-break:break-all;font-weight:600;}
.qr-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  text-align:center;
  box-shadow:0 10px 26px rgba(9,80,74,.06);
}
.qr-box{
  width:180px;
  max-width:100%;
  margin:0 auto 12px;
  border-radius:12px;
  overflow:hidden;
  border:1px solid rgba(13,148,136,.16);
  background:#f2fbfa;
}
.qr-box img{display:block;width:100%;height:auto;}
.qr-card p{margin:0;font-size:13.5px;color:var(--ink-2);}

/* ============ join ============ */
.join-card{
  background:linear-gradient(135deg,rgba(20,184,166,.12),rgba(34,211,238,.14));
  border:1px solid rgba(13,148,136,.22);
  border-radius:22px;
  padding:34px 32px;
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:28px;
  align-items:center;
}
.join-card h2{margin-top:8px;}
.join-card p{margin:0;color:var(--ink-2);font-size:15px;}
.join-points{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
}
.join-points li{
  background:rgba(255,255,255,.86);
  border:1px solid rgba(13,148,136,.16);
  border-radius:12px;
  padding:12px 16px;
  font-size:14.3px;
  color:var(--teal-800);
}

/* ============ footer ============ */
.site-footer{
  margin-top:20px;
  background:linear-gradient(140deg,#07332f 0%,#0a4a45 60%,#07414d 100%);
  color:#cfeae6;
  padding:44px 0 24px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:34px;
  align-items:start;
  padding-bottom:26px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.footer-brand{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.footer-brand .logo-box{background:rgba(255,255,255,.94);border-radius:10px;padding:6px 10px;width:146px;}
.footer-brand p{margin:0;font-size:13.5px;line-height:1.8;color:#a8d6d0;max-width:420px;}
.footer-links h3{
  font-size:14px;
  color:#ffffff;
  margin:0 0 12px;
  letter-spacing:.06em;
}
.flinks{display:flex;flex-wrap:wrap;gap:8px 16px;}
.flinks a{
  color:#8fe0d6;
  font-size:13.5px;
  text-decoration:none;
  transition:color .2s ease;
}
.flinks a:hover{color:#ffffff;}
.footer-bottom{
  padding-top:18px;
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  align-items:center;
  justify-content:space-between;
  font-size:12.8px;
  color:#9ac9c3;
}
.footer-bottom a{color:#8fe0d6;text-decoration:none;}
.footer-bottom a:hover{color:#ffffff;}

/* ============ float tools ============ */
.float-tools{
  position:fixed;
  right:16px;
  bottom:20px;
  z-index:90;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:10px;
}
.fab{
  width:50px;height:50px;
  border-radius:50%;
  border:0;
  background:linear-gradient(135deg,#0f766e,#0e7490);
  color:#fff;
  font-size:12.5px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  box-shadow:0 12px 26px rgba(9,80,74,.30);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .2s ease, box-shadow .2s ease, opacity .25s ease;
}
.fab:hover{transform:translateY(-3px);box-shadow:0 18px 32px rgba(9,80,74,.34);}
.fab-top{opacity:0;visibility:hidden;background:linear-gradient(135deg,#0c5a54,#0a4a45);}
.fab-top.show{opacity:1;visibility:visible;}
.cs-panel{
  width:230px;
  background:#fff;
  border:1px solid rgba(13,148,136,.20);
  border-radius:16px;
  padding:16px;
  box-shadow:0 22px 44px rgba(9,80,74,.22);
  display:none;
}
.cs-panel.open{display:block;}
.cs-panel h4{margin:0 0 6px;font-size:14px;color:var(--teal-900);}
.cs-panel p{margin:0 0 10px;font-size:12.5px;color:var(--ink-3);line-height:1.7;}
.cs-panel .qr-box{width:100%;margin-bottom:10px;}
.cs-panel a.cs-link{
  display:block;
  font-size:13px;
  color:var(--teal-700);
  text-decoration:none;
  padding:7px 0;
  border-top:1px dashed rgba(13,148,136,.2);
}
.cs-panel a.cs-link:hover{color:var(--teal-600);}

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

/* ============ responsive ============ */
@media (max-width:980px){
  .nav-toggle{display:flex;}
  .nav-links{
    display:none;
    position:absolute;
    left:0;right:0;
    top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:#ffffff;
    border-bottom:1px solid rgba(13,148,136,.16);
    box-shadow:0 20px 34px rgba(9,80,74,.12);
    padding:10px 18px 18px;
    border-radius:0 0 16px 16px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:12px 8px;border-radius:8px;font-size:15px;}
  .nav-links .nav-cta{margin:10px 0 0;text-align:center;padding:12px 20px;}
  .hero-inner{grid-template-columns:1fr;gap:34px;padding:46px 0 42px;}
  .about-layout{grid-template-columns:1fr;gap:28px;}
  .grid-3{grid-template-columns:1fr 1fr;}
  .grid-4{grid-template-columns:1fr 1fr;}
  .timeline{grid-template-columns:1fr 1fr;}
  .score-card{grid-template-columns:1fr;gap:22px;padding:28px 24px;text-align:left;}
  .score-left{border-right:0;border-bottom:1px solid rgba(255,255,255,.16);padding-right:0;padding-bottom:20px;text-align:center;}
  .knowledge-layout{grid-template-columns:1fr;}
  .contact-layout{grid-template-columns:1fr;}
  .join-card{grid-template-columns:1fr;gap:22px;padding:28px 24px;}
  .footer-top{grid-template-columns:1fr;gap:24px;}
}
@media (max-width:720px){
  .section{padding:48px 0;}
  .section-sm{padding:38px 0;}
  .section-head{margin-bottom:28px;}
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;}
  .about-media{grid-template-columns:1fr;}
  .media-box.wide{aspect-ratio:16/9;}
  .form-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .score-right ul{grid-template-columns:1fr;}
  .hero-actions{gap:12px;}
  .btn{width:100%;}
  .hero-actions .btn{width:auto;flex:1 1 auto;min-width:150px;}
  .hp-grid{grid-template-columns:1fr 1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .float-tools{right:12px;bottom:14px;}
  .cs-panel{width:210px;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  html.js .reveal{opacity:1;transform:none;transition:none;}
  .hp-dot{animation:none;}
  .card:hover,.tl-item:hover,.case-card:hover,.btn:hover,.fab:hover{transform:none;}
}