:root {
  --green: #1DB96A; --green-dark: #15A05C; --green-light: #E8F8F0; --green-gradient: linear-gradient(135deg, #1DB96A 0%, #17B87A 100%);
  --orange: #FF7F00; --orange-gradient: linear-gradient(135deg, #FF7F00 0%, #FF6B35 100%);
  --blue: #2563EB; --blue-light: #EFF6FF; --blue-gradient: linear-gradient(135deg, #2563EB 0%, #3B82F6 100%);
  --purple: #7C3AED; --purple-gradient: linear-gradient(135deg, #7C3AED 0%, #6D28D9 100%);
  --gold: #D4A017; --gold-light: #FEF9E7; --gold-gradient: linear-gradient(135deg, #D4A017 0%, #F4C542 100%);
  --red: #EF4444; --red-gradient: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
  --dark: #0F172A; --dark-secondary: #1E293B;
  --text: #0F172A; --text-secondary: #64748B; --text-light: #94A3B8;
  --bg: #FFFFFF; --bg-gray: #F8FAFC; --bg-warm: #FFFBF5; --bg-cool: #F0F9FF;
  --border: #E2E8F0; --border-light: #F1F5F9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.15);
  --radius: 16px; --radius-sm: 10px; --radius-lg: 24px; --radius-xl: 32px;
  --font: "Microsoft YaHei","PingFang SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --max-w: 1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}

/* ===== Header — Transparent over hero, white on scroll ===== */
.hdr{position:absolute;top:0;left:0;right:0;z-index:100;background:transparent;border-bottom:1px solid transparent;transition:background .4s,border-color .4s,box-shadow .4s}
.hdr.scrolled{position:fixed;background:rgba(255,255,255,0.98);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-light);box-shadow:0 2px 20px rgba(0,0,0,0.08)}
.hdr-in{max-width:var(--max-w);margin:0 auto;padding:0 24px;display:flex;align-items:center;height:72px;gap:28px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo img {height: 38px;}
.hdr.scrolled .logo-t{color:var(--green)}
.hdr.scrolled .logo-s{color:var(--text-secondary)}
.nav{display:flex;gap:2px;flex:1}
.nav a{padding:8px 16px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;color:rgba(255,255,255,0.75);transition:all .3s;white-space:nowrap}
.nav a:hover,.nav a.on{background:rgba(255,255,255,0.12);color:#fff}
.hdr.scrolled .nav a{color:var(--text-secondary)}
.hdr.scrolled .nav a:hover,.hdr.scrolled .nav a.on{background:var(--green-light);color:var(--green)}
.hdr-r{display:flex;align-items:center;gap:14px;flex-shrink:0}
.hdr-phone{display:flex;align-items:center;gap:8px;font-size:12px;color:rgba(255,255,255,0.7)}
.hdr-phone b{font-size:15px;color:#fff;display:block;transition:color .4s}
.hdr.scrolled .hdr-phone{color:var(--text-secondary)}
.hdr.scrolled .hdr-phone b{color:var(--text)}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-size:15px;font-weight:700;cursor:pointer;border:none;transition:all .25s;text-align:center}
.btn-g{background:var(--green-gradient);color:#fff;box-shadow:0 4px 14px rgba(29,185,106,0.35)}
.btn-g:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(29,185,106,0.4)}
.btn-o{background:var(--orange-gradient);color:#fff;box-shadow:0 4px 14px rgba(255,127,0,0.3)}
.btn-o:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,127,0,0.35)}
.btn-w{background:#fff;color:var(--green);font-weight:700;box-shadow:var(--shadow)}
.btn-w:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-wp{background:#fff;color:var(--purple);font-weight:700;box-shadow:var(--shadow)}
.btn-wp:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-gh{background:rgba(255,255,255,0.15);color:#fff;border:2px solid rgba(255,255,255,0.4);backdrop-filter:blur(4px)}
.btn-gh:hover{background:rgba(255,255,255,0.25)}
.btn-gold{background:var(--gold-gradient);color:#fff;box-shadow:0 4px 14px rgba(212,160,23,0.4)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(212,160,23,0.5)}
.btn-b{background:var(--blue-gradient);color:#fff;box-shadow:0 4px 14px rgba(37,99,235,0.3)}
.btn-b:hover{transform:translateY(-2px)}
.btn-p{background:var(--purple-gradient);color:#fff;box-shadow:0 4px 14px rgba(124,58,237,0.3)}
.btn-p:hover{transform:translateY(-2px)}
.btn-r{background:var(--red-gradient);color:#fff;box-shadow:0 4px 14px rgba(239,68,68,0.3)}
.btn-lg{padding:16px 36px;font-size:17px;border-radius:var(--radius)}
.btn-sm{padding:8px 18px;font-size:13px}

/* ===== Footer ===== */
.ftr{background:var(--dark);padding:56px 24px 0;color:rgba(255,255,255,0.6)}
.ftr-in{max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.ftr-brand .logo-t{color:#fff;font-size:20px;margin-bottom:10px}
.ftr-brand p{font-size:13px;line-height:1.8}
.ftr h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.ftr ul{list-style:none}
.ftr ul li{margin-bottom:10px}
.ftr ul li a{font-size:13px;color:rgba(255,255,255,0.5);transition:color .2s}
.ftr ul li a:hover{color:var(--green)}
.ftr-contact{font-size:13px}
.ftr-ci{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px}
.ftr-ci .ic{flex-shrink:0;font-size:16px}
.ftr-qr{width:100px;height:100px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;margin-top:14px;font-size:11px;color:rgba(255,255,255,0.3)}
.ftr-bottom{max-width:var(--max-w);margin:40px auto 0;padding:20px 0;border-top:1px solid rgba(255,255,255,0.08);font-size:12px;text-align:center;color:rgba(255,255,255,0.3)}

/* ===== Float ===== */
.float-w{position:fixed;right:16px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:8px;z-index:200}
.fw-i{width:52px;height:52px;border-radius:var(--radius-sm);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;font-size:10px;font-weight:700;transition:all .2s;box-shadow:var(--shadow-md)}
.fw-i .ic{font-size:20px;margin-bottom:1px}
.fw-g{background:var(--green-gradient);color:#fff}
.fw-wx{background:#07C160;color:#fff}
.fw-top{background:#fff;color:var(--text);border:1px solid var(--border)}
.fw-i:hover{transform:scale(1.08)}

.i-icon{display:inline-block;width:1em;height:1em;vertical-align:-0.125em;flex-shrink:0}
.i-icon-lg{width:28px;height:28px}
.i-icon-xl{width:48px;height:48px}