/* ===== SUPERCLOUDS 全站公共样式（由 5 页面抽离去重，单一来源）===== */
/* ===== CSS Variables ===== */
:root{
  --bg:#050e1f;
  --bg2:#071428;
  --navy:#0a1f44;
  --navy2:#1e3a6e;
  --blue:#1e6bff;
  --cyan:#00c2ff;
  --teal:#00ffc6;
  --purple:#6c5cff;
  --white:#fff;
  --text:#e8edf5;
  --muted:#64748b;
  --border:rgba(0,194,255,.1);
  --border2:rgba(30,107,255,.15);
  --shadow:0 4px 24px rgba(0,0,0,.3);
  --shadow-glow:0 0 40px rgba(0,194,255,.12);
  --grad:linear-gradient(135deg,#1e6bff 0%,#00c2ff 100%);
  --grad2:linear-gradient(135deg,#6c5cff 0%,#1e6bff 50%,#00c2ff 100%);
  --card-bg:linear-gradient(145deg,rgba(10,31,68,.9),rgba(5,14,31,.95));
  --green:     #10b981;
  --cyan2:     #00b4d8;
  --grad-main: linear-gradient(135deg,#020c1b 0%,#0d2148 55%,#063a5a 100%);
  --grad-blue: var(--grad);
  --grad-cyan: var(--grad2);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.35);
  --t:         .3s ease;
}
/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter','PingFang SC','Microsoft YaHei',Arial,sans-serif;
  color:var(--text);background:var(--bg);
  line-height:1.7;font-size:15px;overflow-x:hidden
}
h1,h2,h3,.section-title,.hero-title,.hero h1,.nav-logo span{font-family:'Orbitron','PingFang SC','Microsoft YaHei',sans-serif;letter-spacing:.5px}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
/* ===== Layout ===== */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-light{background:var(--bg)}
/* ===== Titles ===== */
.section-title,.section-title-white{
  text-align:center;font-size:32px;font-weight:800;
  margin-bottom:12px;letter-spacing:-.5px
}
.section-title{color:#fff}
.section-title-white{color:#fff}
.section-title::after,.section-title-white::after{
  content:'';display:block;width:50px;height:3px;
  background:var(--grad-cyan);margin:14px auto 0;border-radius:2px
}
.section-subtitle,.section-subtitle-white{
  text-align:center;font-size:15px;margin-bottom:52px;
  max-width:580px;margin-left:auto;margin-right:auto
}
.section-subtitle{color:var(--muted)}
.section-subtitle-white{color:rgba(255,255,255,.6)}
/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 32px;border-radius:8px;font-size:15px;
  font-weight:600;cursor:pointer;transition:all var(--t);
  border:2px solid transparent;letter-spacing:.2px
}
.btn-primary{
  background:var(--grad);color:#fff;
  box-shadow:0 4px 20px rgba(30,107,255,.4)
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 32px rgba(30,107,255,.5)}
.btn-outline{
  background:rgba(255,255,255,.08);color:#fff;
  border-color:rgba(255,255,255,.4);backdrop-filter:blur(8px)
}
.btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff;transform:translateY(-3px)}
.btn-white{background:#fff;color:var(--navy2);font-weight:700}
.btn-white:hover{background:#e0f7ff;transform:translateY(-3px)}
/* ===== Header ===== */
#header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:#090c1a;
  border-bottom:1px solid rgba(0,194,255,.18);
  box-shadow:0 2px 32px rgba(0,0,0,.5),0 1px 0 rgba(0,194,255,.08);
  transition:background var(--t),box-shadow var(--t)
}
#header.scrolled{
  background:#090c1a;
  border-bottom:1px solid rgba(0,194,255,.22);
  box-shadow:0 4px 40px rgba(0,0,0,.6),0 1px 0 rgba(0,194,255,.1)
}
.navbar{display:flex;align-items:center;justify-content:space-between;height:120px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:19px;font-weight:800}
.logo-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{
  color:rgba(255,255,255,.8);padding:8px 18px;
  border-radius:7px;font-size:17px;font-weight:500;transition:var(--t)
}
.nav-menu a:hover,.nav-menu a.active{color:#fff;background:rgba(255,255,255,.09)}
.nav-menu a.active{color:var(--cyan)}
.nav-cta{
  background:var(--grad-blue) !important;color:#fff !important;
  padding:8px 20px !important;border-radius:20px !important;
  box-shadow:0 0 18px rgba(0,180,216,.3)
}
.nav-cta:hover{box-shadow:0 0 28px rgba(0,180,216,.5) !important}
.nav-console{border:1.5px solid var(--cyan) !important;color:var(--cyan) !important;border-radius:8px;padding:7px 16px !important;font-weight:600;transition:.25s}
.nav-console:hover{background:var(--cyan) !important;color:#fff !important}
.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer}
.menu-toggle span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:var(--t)}
@keyframes dotMove{from{background-position:0 0}to{background-position:40px 40px}}
/* Scan line */
.hero::after{
  content:'';position:absolute;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,transparent,rgba(0,212,255,.4),transparent);
  z-index:2;
  animation:scan 6s linear infinite
}
@keyframes scan{0%{top:-2px}100%{top:100%}}
/* Glowing orbs */
.orb{
  position:absolute;border-radius:50%;
  filter:blur(70px);animation:orbFloat 9s ease-in-out infinite;z-index:3
}
.orb-1{
  width:480px;height:480px;top:-120px;right:-80px;
  background:radial-gradient(circle,rgba(0,180,216,.2) 0%,transparent 70%);
  animation-delay:0s
}
.orb-2{
  width:380px;height:380px;bottom:-80px;right:28%;
  background:radial-gradient(circle,rgba(124,58,237,.2) 0%,transparent 70%);
  animation-delay:-4.5s
}
.orb-3{
  width:280px;height:280px;top:35%;left:-60px;
  background:radial-gradient(circle,rgba(0,212,255,.14) 0%,transparent 70%);
  animation-delay:-2s
}
@keyframes orbFloat{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-28px) scale(1.06)}}
/* Particles */
.particles-wrap{position:absolute;inset:0;z-index:4;overflow:hidden;pointer-events:none}
.particle{
  position:absolute;border-radius:50%;
  background:var(--cyan);opacity:0;
  animation:ptFly linear infinite
}
@keyframes ptFly{
  0%{transform:translateY(110vh) translateX(0);opacity:0}
  8%{opacity:.8}88%{opacity:.35}
  100%{transform:translateY(-80px) translateX(var(--dx,30px));opacity:0}
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);animation:blink 1.8s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1;box-shadow:0 0 6px var(--cyan)}50%{opacity:.3;box-shadow:none}}
.hero-title{
  font-size:clamp(34px,5.5vw,60px);font-weight:900;
  color:#fff;line-height:1.15;margin-bottom:22px;letter-spacing:-1.5px
}
.hero-title .hl{
  background:linear-gradient(90deg,#00d4ff 0%,#a78bfa 60%,#00d4ff 100%);
  background-size:200% auto;
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  animation:shimmer 4s linear infinite
}
@keyframes shimmer{to{background-position:200% center}}
.hero-desc{
  font-size:16px;color:rgba(255,255,255,.68);
  margin-bottom:40px;line-height:1.85;max-width:560px
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{
  display:flex;gap:0;margin-top:60px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.07);
  border-radius:16px;overflow:hidden;
  backdrop-filter:blur(16px)
}
.hero-stat{
  flex:1;text-align:center;padding:24px 20px;
  border-right:1px solid rgba(255,255,255,.07)
}
.hero-stat:last-child{border-right:none}
.hero-stat .label{font-size:11px;color:rgba(255,255,255,.45);margin-top:6px;text-transform:uppercase;letter-spacing:.6px}
/* scroll hint */
.scroll-hint{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  z-index:10;display:flex;flex-direction:column;align-items:center;gap:8px;
  color:rgba(255,255,255,.35);font-size:11px;letter-spacing:1px;text-transform:uppercase
}
.scroll-mouse{
  width:22px;height:36px;border:2px solid rgba(255,255,255,.25);
  border-radius:11px;display:flex;justify-content:center;padding-top:5px
}
.scroll-wheel{
  width:3px;height:7px;background:var(--cyan);border-radius:2px;
  animation:wheel 1.8s ease-in-out infinite
}
@keyframes wheel{0%,100%{transform:translateY(0);opacity:1}50%{transform:translateY(9px);opacity:0}}
@keyframes tickerBg{0%{background-position:0 0}100%{background-position:200% 0}}
.ticker-item::before{content:'◆ ';font-size:9px;opacity:.6}
@keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}
/* ===== Cards (light bg) ===== */
.card{
  background:#fff;border-radius:16px;
  box-shadow:0 4px 24px rgba(0,0,0,.3),0 0 0 1px rgba(0,194,255,.06);padding:36px 30px;
  transition:all var(--t);border:1px solid var(--border);
  position:relative;overflow:hidden
}
.card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad-cyan);transform:scaleX(0);
  transition:transform var(--t);transform-origin:left
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:rgba(0,212,255,.18)}
.card:hover::before{transform:scaleX(1)}
.card-icon{
  width:60px;height:60px;
  background:linear-gradient(135deg,rgba(0,212,255,.12),rgba(124,58,237,.12));
  border:1px solid rgba(0,212,255,.18);
  border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:26px;margin-bottom:20px;transition:var(--t)
}
.card:hover .card-icon{transform:scale(1.1) rotate(-4deg)}
.card h3{font-size:18px;font-weight:700;color:#fff;margin-bottom:10px}
.card p{color:var(--muted);font-size:14px;line-height:1.75}
/* Glass card (dark bg) */
.glass-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:16px;padding:32px;backdrop-filter:blur(20px);transition:all var(--t)
}
.glass-card:hover{
  background:rgba(255,255,255,.1);border-color:rgba(0,212,255,.3);
  transform:translateY(-6px);box-shadow:0 20px 40px rgba(0,0,0,.35)
}
/* ===== Stats Band ===== */
.stats-band{
  padding:60px 0;
  background:
    radial-gradient(ellipse 60% 80% at 20% 50%,rgba(0,100,220,.25) 0%,transparent 60%),
    radial-gradient(ellipse 50% 70% at 80% 50%,rgba(0,150,180,.2) 0%,transparent 60%),
    linear-gradient(135deg,#020c1b,#0d2148,#020c1b);
  position:relative;overflow:hidden
}
.stats-band::before{
  content:'';position:absolute;inset:0;
  background-image:radial-gradient(rgba(0,212,255,.15) 1px,transparent 1px);
  background-size:32px 32px;opacity:.5
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;z-index:1}
.stat-item{text-align:center;padding:0 28px;border-right:1px solid rgba(255,255,255,.1)}
.stat-item:last-child{border-right:none}
.stat-item .stat-label{font-size:12px;color:rgba(255,255,255,.5);margin-top:8px;text-transform:uppercase;letter-spacing:.8px}
.stat-item .stat-sub{font-size:12px;color:rgba(255,255,255,.3);margin-top:4px}
/* ===== Dark Section ===== */
.section-dark{
  padding:88px 0;
  background:
    radial-gradient(ellipse 70% 60% at 10% 50%,rgba(0,80,200,.15) 0%,transparent 55%),
    radial-gradient(ellipse 50% 50% at 90% 30%,rgba(100,0,200,.12) 0%,transparent 50%),
    linear-gradient(180deg,#010810 0%,#020e1e 50%,#010810 100%);
  position:relative;overflow:hidden
}
/* Circuit board pattern overlay */
.section-dark::before{
  content:'';position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(rgba(0,212,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,.04) 1px,transparent 1px);
  background-size:60px 60px
}
.section-dark .container{position:relative;z-index:1}
/* Advantage items */
.adv-item{
  display:flex;gap:20px;padding:28px;border-radius:14px;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.07);
  transition:all var(--t)
}
.adv-item:hover{
  border-color:rgba(0,212,255,.28);background:rgba(0,212,255,.06);
  transform:translateX(6px);box-shadow:0 0 28px rgba(0,212,255,.08)
}
.adv-num{font-size:40px;font-weight:900;color:rgba(0,212,255,.15);line-height:1;flex-shrink:0;width:50px}
.adv-content h4{font-size:17px;font-weight:700;color:#fff;margin-bottom:8px}
.adv-content p{font-size:14px;color:rgba(255,255,255,.52);line-height:1.7}
/* ===== Steps ===== */
.steps{display:flex;gap:0;position:relative}
.steps::before{
  content:'';position:absolute;top:44px;left:13%;right:13%;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--purple));opacity:.3
}
.step{flex:1;text-align:center;position:relative;padding:0 20px}
.step-num{
  width:88px;height:88px;border-radius:50%;
  background:var(--grad-cyan);color:#fff;
  font-size:28px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 20px;position:relative;z-index:1;
  box-shadow:0 0 0 8px rgba(0,212,255,.08),0 8px 24px rgba(0,180,216,.35)
}
.step h4{font-size:16px;font-weight:700;color:var(--navy2);margin-bottom:8px}
.step p{font-size:13px;color:var(--muted);line-height:1.6}
/* ===== Partners ===== */
.partners-row{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center}
.partner-item{
  background:#fff;border:1px solid var(--border);border-radius:12px;
  padding:15px 28px;font-size:15px;font-weight:700;color:var(--muted);
  transition:all var(--t);min-width:120px;text-align:center
}
.partner-item:hover{
  border-color:var(--cyan);color:var(--navy2);
  box-shadow:0 0 18px rgba(0,212,255,.15);transform:translateY(-3px)
}
.breadcrumb a{color:var(--cyan);opacity:1}
.breadcrumb a:hover{text-decoration:underline}
/* ===== CTA Section ===== */
.cta-section{
  padding:88px 0;text-align:center;color:#fff;
  position:relative;overflow:hidden;
  background:
    radial-gradient(ellipse 80% 70% at 50% 50%,rgba(0,80,200,.3) 0%,transparent 65%),
    radial-gradient(ellipse 50% 40% at 10% 50%,rgba(0,200,220,.2) 0%,transparent 50%),
    radial-gradient(ellipse 50% 40% at 90% 50%,rgba(100,0,200,.18) 0%,transparent 50%),
    linear-gradient(180deg,#010810 0%,#020e1e 100%)
}
.cta-section::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,.035) 1px,transparent 1px);
  background-size:50px 50px
}
.cta-section .container{position:relative;z-index:1}
.cta-section h2{font-size:38px;font-weight:900;margin-bottom:14px;letter-spacing:-1px}
.cta-section p{font-size:17px;opacity:.75;margin-bottom:40px}
/* ===== Product Cards ===== */
.product-card{
  background:#fff;border-radius:16px;border:1px solid rgba(30,107,255,.15);
  overflow:hidden;transition:all var(--t);box-shadow:0 4px 24px rgba(0,0,0,.3),0 0 0 1px rgba(30,107,255,.08)
}
.product-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.product-card-header{
  background:var(--grad-main);padding:30px 26px 22px;color:#fff;
  position:relative;overflow:hidden
}
.product-card-header::after{
  content:'';position:absolute;top:-40px;right:-40px;
  width:120px;height:120px;background:rgba(255,255,255,.05);border-radius:50%
}
.product-card-header .icon{font-size:38px;margin-bottom:12px}
.product-card-header h3{font-size:20px;font-weight:700}
.product-card-header p{font-size:13px;opacity:.7;margin-top:4px}
.product-card-body{padding:26px}
.product-features{margin:14px 0}
.product-features li{
  padding:8px 0;border-bottom:1px solid var(--border);
  font-size:14px;color:var(--muted);display:flex;align-items:center;gap:9px
}
.product-features li:last-child{border-bottom:none}
.product-features li::before{content:'✓';color:var(--green);font-weight:700;font-size:13px;flex-shrink:0}
.product-price span{font-size:26px;font-weight:800;color:var(--navy2)}
/* ===== Timeline ===== */
.timeline{position:relative;padding-left:40px}
.timeline::before{
  content:'';position:absolute;left:12px;top:0;bottom:0;width:2px;
  background:linear-gradient(var(--navy2),var(--cyan))
}
.timeline-item{position:relative;margin-bottom:40px}
.timeline-item::before{
  content:'';position:absolute;left:-32px;top:6px;
  width:14px;height:14px;border-radius:50%;background:var(--cyan);
  border:3px solid #fff;
  box-shadow:0 0 0 3px var(--cyan),0 0 16px rgba(0,212,255,.45)
}
.timeline-year{font-size:13px;font-weight:700;color:var(--cyan2);margin-bottom:4px}
.timeline-title{font-size:17px;font-weight:700;color:var(--navy2);margin-bottom:6px}
.timeline-desc{font-size:14px;color:var(--muted);line-height:1.7}
/* ===== Team ===== */
.team-card{
  text-align:center;background:#fff;border-radius:16px;
  box-shadow:var(--shadow);border:1px solid var(--border);
  padding:36px 24px;transition:all var(--t)
}
.team-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:rgba(0,212,255,.2)}
.team-avatar{
  width:90px;height:90px;border-radius:50%;
  background:var(--grad-cyan);margin:0 auto 16px;
  display:flex;align-items:center;justify-content:center;
  font-size:36px;color:#fff;font-weight:800;
  box-shadow:0 0 28px rgba(0,180,216,.4)
}
.team-card h4{font-size:17px;font-weight:700;color:var(--navy2)}
.team-card .role{font-size:13px;color:var(--cyan2);margin:5px 0 12px;font-weight:500}
.team-card p{font-size:13px;color:var(--muted);line-height:1.7}
/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-info-item{display:flex;gap:16px;margin-bottom:26px;align-items:flex-start}
.contact-info-item .ci-icon{
  width:50px;height:50px;
  background:linear-gradient(135deg,rgba(0,212,255,.1),rgba(124,58,237,.1));
  border:1px solid rgba(0,212,255,.18);border-radius:12px;
  display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0
}
.ci-content h4{font-size:14px;font-weight:700;color:var(--navy2);margin-bottom:3px}
.ci-content p{font-size:14px;color:var(--muted)}
/* ===== Form ===== */
.form{display:flex;flex-direction:column;gap:14px}
.form input,.form textarea,.form select{
  width:100%;padding:13px 16px;border:1.5px solid var(--border);
  border-radius:10px;font-size:14px;font-family:inherit;color:var(--text);
  background:#fff;transition:var(--t);outline:none
}
.form input:focus,.form textarea:focus,.form select:focus{
  border-color:var(--cyan);box-shadow:0 0 0 4px rgba(0,212,255,.08)
}
.form textarea{min-height:130px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
/* ===== Feature list ===== */
.feature-list{margin-top:18px}
.feature-list li{
  display:flex;align-items:flex-start;gap:12px;
  margin-bottom:13px;font-size:14px;color:var(--muted)
}
.feature-list li .fi{
  width:21px;height:21px;background:var(--grad-cyan);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:11px;color:#fff;flex-shrink:0;margin-top:1px
}
/* ===== FAQ ===== */
.faq-item{border:1px solid var(--border);border-radius:12px;overflow:hidden;margin-bottom:12px}
.faq-q{
  padding:18px 22px;font-size:15px;font-weight:600;color:var(--navy2);
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  background:#fff;transition:var(--t);user-select:none
}
.faq-q:hover{background:#f8fafc}
.faq-q.open{background:var(--grad-main);color:#fff}
.faq-q .arrow{font-size:12px;transition:transform var(--t);flex-shrink:0}
.faq-q.open .arrow{transform:rotate(180deg)}
.faq-a{
  display:none;padding:18px 22px;font-size:14px;color:var(--muted);
  background:#f8fafc;border-top:1px solid var(--border);line-height:1.85
}
.faq-a.open{display:block}
/* ===== Scroll animation ===== */
.fade-up{opacity:0;transform:translateY(28px);transition:opacity .65s ease,transform .65s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}
.fade-up:nth-child(2){transition-delay:.1s}
.fade-up:nth-child(3){transition-delay:.2s}
.fade-up:nth-child(4){transition-delay:.3s}
.fade-up:nth-child(5){transition-delay:.4s}
.fade-up:nth-child(6){transition-delay:.5s}
/* ===== Footer ===== */
#footer{
  background:
    radial-gradient(ellipse 70% 50% at 30% 50%,rgba(0,60,160,.18) 0%,transparent 60%),
    #01060f;
  color:rgba(255,255,255,.6);padding:72px 0 0
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand p{font-size:13px;line-height:1.85;margin-bottom:22px;color:rgba(255,255,255,.45)}
.footer-col{min-width:0}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:13px;color:rgba(255,255,255,.45);transition:var(--t)}
.footer-col ul li a:hover{color:var(--cyan);padding-left:4px}
.footer-contact-item{display:flex;gap:10px;margin-bottom:13px;font-size:13px;align-items:flex-start}
.footer-contact-item .icon{color:var(--cyan);font-size:14px;flex-shrink:0;margin-top:2px}
.footer-contact-item span,.footer-contact-item a{overflow-wrap:break-word;word-break:break-word;min-width:0}
.footer-hotline{margin-top:20px}
.footer-hotline .tg-btn{display:inline-flex;align-items:center;gap:10px;background:linear-gradient(135deg,#0088cc,#00b4d8);color:#fff;font-size:14px;font-weight:700;padding:10px 20px;border-radius:8px;text-decoration:none;transition:.3s;box-shadow:0 4px 16px rgba(0,180,216,.3);}
.footer-hotline .tg-btn:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(0,180,216,.45);}
.footer-hotline .tg-btn svg{flex-shrink:0;}
.footer-hotline .sub{font-size:12px;margin-top:8px;color:rgba(255,255,255,.3)}
.footer-bottom{padding:20px 0;text-align:center;font-size:12px;color:rgba(255,255,255,.22)}
.footer-bottom a{color:rgba(255,255,255,.38)}
.footer-bottom a:hover{color:var(--cyan)}
/* ===== Grids ===== */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
/* ===== Back to top ===== */
#back-top{
  position:fixed;bottom:28px;right:28px;z-index:999;
  width:46px;height:46px;background:var(--grad-cyan);color:#fff;
  border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:18px;cursor:pointer;opacity:0;pointer-events:none;
  transition:var(--t);box-shadow:0 4px 18px rgba(0,180,216,.4)
}
#back-top.visible{opacity:1;pointer-events:auto}
#back-top:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(0,180,216,.55)}
/* ===== Scrollbar ===== */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:#01060f}
::-webkit-scrollbar-thumb{background:#0d2148;border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--cyan2)}
/* ===== Responsive ===== */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .stat-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.1);padding-bottom:24px}
  .stat-item:nth-child(odd){border-right:1px solid rgba(255,255,255,.1)}
  .stat-item:last-child,.stat-item:nth-last-child(2):nth-child(odd){border-bottom:none}
}