:root{
  --brand:#123a6b;
  --brand-dark:#0c2748;
  --accent:#ff7a00;
  --ink:#1f2937;
  --muted:#6b7280;
  --line:#e5e9f0;
  --bg:#ffffff;
  --soft:#f5f8fc;
  --radius:16px;
  --shadow:0 10px 30px rgba(18,58,107,.08);
  --shadow-lg:0 18px 50px rgba(18,58,107,.14);
}

*{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth;scroll-padding-top:72px}

body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}

.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s,border-color .25s,background .25s;
}
.nav.scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 4px 20px rgba(18,58,107,.07);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}

.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:40px;height:40px;flex:none;border-radius:10px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;letter-spacing:1px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.35}
.brand-text strong{font-size:15px;color:var(--brand)}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}

.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:15px;color:#33404f;transition:color .2s}
.nav-links a:hover{color:var(--accent)}
.nav-cta{
  padding:8px 18px;border-radius:999px;
  background:var(--brand);color:#fff !important;
  transition:background .2s,transform .2s;
}
.nav-cta:hover{background:var(--accent);transform:translateY(-1px)}

.nav-toggle{
  display:none;width:40px;height:40px;border:0;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--brand);transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(1000px 520px at 78% 12%, rgba(255,122,0,.28), transparent 60%),
    radial-gradient(760px 460px at 12% 82%, rgba(58,140,255,.22), transparent 62%),
    linear-gradient(140deg,var(--brand-dark) 0%,var(--brand) 55%,#1b4c85 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:64px 64px;
}
.hero-inner{position:relative;z-index:1;color:#fff}

.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:2px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);
  margin-bottom:24px;
}
.hero h1{
  font-size:clamp(34px,5.4vw,62px);line-height:1.18;font-weight:700;letter-spacing:1px;
}
.hero h1 .hl{
  color:#ffb066;
  position:relative;
}
.hero-desc{
  margin-top:24px;max-width:620px;font-size:17px;color:rgba(255,255,255,.86);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:500;transition:.22s;border:1px solid transparent;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#ff8f29;transform:translateY(-2px);box-shadow:0 10px 24px rgba(255,122,0,.35)}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.45);color:#fff;backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-block{width:100%;margin-top:8px}

.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px}
.hero-tags span{
  font-size:13px;padding:6px 14px;border-radius:8px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);
}

/* ---------- section ---------- */
.section{padding:96px 0}
.section-alt{background:var(--soft)}
.section-dark{background:linear-gradient(140deg,var(--brand-dark),var(--brand));color:#fff}

.head{text-align:center;margin-bottom:56px}
.kicker{font-size:12px;letter-spacing:3px;color:var(--accent);font-weight:500}
.section-dark .kicker{color:#ffb066}
.head h2{font-size:clamp(26px,3.4vw,36px);font-weight:700;margin:10px 0 14px;color:inherit}
.line{width:56px;height:3px;margin:0 auto;border-radius:2px;background:var(--accent)}
.head-desc{margin-top:18px;color:var(--muted);font-size:15px}
.head-light .head-desc{color:rgba(255,255,255,.75)}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:start}
.about-text .lead{font-size:17px;color:var(--brand);font-weight:500;margin-bottom:16px}
.about-text p{color:#4a5561;margin-bottom:16px}
.about-list li{display:flex;align-items:center;gap:10px;color:#4a5561;margin-bottom:10px}
.about-list i{width:7px;height:7px;border-radius:50%;background:var(--accent);flex:none}

.about-card{
  background:linear-gradient(160deg,#fff,var(--soft));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow);
}
.ac-item{display:flex;align-items:baseline;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line)}
.ac-num{font-size:34px;font-weight:700;color:var(--accent);line-height:1}
.ac-label{font-size:15px;color:var(--ink)}
.ac-note{margin-top:18px;font-size:14px;color:var(--muted)}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:.25s;box-shadow:0 2px 10px rgba(18,58,107,.04);
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(255,122,0,.35)}
.card-icon{
  width:52px;height:52px;border-radius:14px;margin-bottom:20px;
  background:rgba(18,58,107,.07);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
}
.card-icon svg{width:26px;height:26px}
.card h3{font-size:18px;font-weight:600;margin-bottom:12px;color:var(--brand)}
.card p{font-size:14.5px;color:var(--muted);margin-bottom:16px}
.card-list li{font-size:14px;color:#4a5561;padding:7px 0;border-top:1px dashed var(--line)}
.card-list li:first-child{border-top:0}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.step{position:relative;padding-top:26px;border-top:3px solid var(--line)}
.step::before{
  content:"";position:absolute;top:-3px;left:0;width:64px;height:3px;background:var(--accent);
}
.step-no{font-size:15px;font-weight:700;color:var(--accent);letter-spacing:1px}
.step h3{font-size:18px;margin:8px 0 10px;color:var(--brand)}
.step p{font-size:14.5px;color:var(--muted)}

/* ---------- advantage ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv{
  padding:30px 26px;border-radius:var(--radius);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  transition:.25s;
}
.adv:hover{background:rgba(255,255,255,.14);transform:translateY(-4px)}
.adv h3{font-size:18px;margin-bottom:10px;color:#fff}
.adv p{font-size:14.5px;color:rgba(255,255,255,.78)}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:32px}
.contact-info{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px;box-shadow:var(--shadow);
}
.ci-item{padding:14px 0;border-bottom:1px dashed var(--line)}
.ci-item:last-of-type{border-bottom:0}
.ci-label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
.ci-value{display:block;font-size:16px;color:var(--ink)}
.ci-tel{font-size:26px;font-weight:700;color:var(--brand);letter-spacing:1px}
.ci-tel:hover{color:var(--accent)}

.contact-card{
  background:linear-gradient(160deg,var(--brand),var(--brand-dark));
  color:#fff;border-radius:var(--radius);padding:34px;
  box-shadow:var(--shadow-lg);
}
.contact-card h3{font-size:20px;margin-bottom:14px}
.contact-card p{font-size:14.5px;color:rgba(255,255,255,.82);margin-bottom:20px}
.contact-card li{
  display:flex;align-items:center;gap:10px;font-size:15px;
  padding:10px 0;border-top:1px solid rgba(255,255,255,.14);
}
.contact-card i{width:7px;height:7px;border-radius:50%;background:#ffb066;flex:none}

/* ---------- footer ---------- */
.footer{background:var(--brand-dark);color:rgba(255,255,255,.72);padding:38px 0}
.footer-inner{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.footer-brand{display:flex;align-items:center;gap:12px;font-size:16px;color:#fff}
.footer-meta{text-align:right;font-size:14px}
.footer-meta a:hover{color:#ffb066}
.footer-copy{margin-top:6px;font-size:13px;color:rgba(255,255,255,.5)}
.footer-beian{margin-top:22px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);text-align:center;font-size:13px;line-height:2}
.footer-beian a{color:rgba(255,255,255,.62)}
.footer-beian a:hover{color:#ffb066}
.footer-beian img{vertical-align:middle;margin-right:6px;height:16px}

/* ---------- float call ---------- */
.float-call{
  position:fixed;right:18px;bottom:18px;z-index:60;
  display:flex;align-items:center;gap:8px;
  padding:12px 18px;border-radius:999px;
  background:var(--accent);color:#fff;font-size:14px;
  box-shadow:0 10px 26px rgba(255,122,0,.4);
  transition:.22s;
}
.float-call:hover{transform:translateY(-2px);background:#ff8f29}
.float-call svg{width:18px;height:18px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .cards,.steps,.adv-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .contact-grid{grid-template-columns:1fr}
}

@media (max-width:768px){
  .nav-links{
    position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 12px 24px rgba(18,58,107,.1);
    padding:8px 24px 16px;
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-links a:last-child{border-bottom:0}
  .nav-cta{text-align:center;margin-top:12px}
  .nav-toggle{display:flex}
  .brand-text em{display:none}

  .section{padding:64px 0}
  .hero{padding:110px 0 60px;min-height:auto}
  .hero-tags{margin-top:32px}
  .cards,.steps,.adv-grid{grid-template-columns:1fr}
  .footer-meta{text-align:left}
  .float-call span{display:none}
  .float-call{padding:14px;border-radius:50%}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .reveal{opacity:1;transform:none}
}