/* ── RESET & BASE ─────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--page-max-width:1200px}
body{font-family:'Inter','Segoe UI',Arial,sans-serif;color:#333}
img{max-width:100%;display:block}
a{text-decoration:none}

/* ── NAV ─────────────────────────────────────────────── */
nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 48px;height:68px;background:#fff;
  box-shadow:0 2px 10px rgba(0,0,0,.07);
  position:sticky;top:0;z-index:100;
  max-width:var(--page-max-width);width:100%;margin-left:auto;margin-right:auto;
}
.logo{display:flex;align-items:center;gap:10px}
.logo-img{height:40px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none}
.nav-links li.sep{display:none}
.nav-links a{
  font-size:14.5px;font-weight:500;color:#444;
  transition:color .2s;white-space:nowrap;
}
.nav-links a:hover,.nav-links a.active{color:#172D5E}

/* Services dropdown (desktop: hover; mobile: caret toggles .nav-dropdown--open) */
.nav-dropdown{position:relative}
.nav-dropdown-row{
  display:flex;align-items:center;gap:2px;min-width:0;
}
.nav-dropdown-row > a{flex:1;min-width:0}
.nav-dropdown-caret{
  display:none;
  flex-shrink:0;
  align-items:center;justify-content:center;
  width:40px;height:40px;margin:0;padding:0;
  border:none;border-radius:8px;background:transparent;color:#172D5E;
  cursor:pointer;
}
.nav-dropdown-caret i{font-size:12px;transition:transform .2s}
.nav-dropdown.nav-dropdown--open .nav-dropdown-caret i{transform:rotate(180deg)}
/* 不要用 margin 顶开下拉与主菜单的间距：中间会出现“悬停盲区”，鼠标一移过去菜单就消失 */
.nav-dropdown-menu{
  display:none;position:absolute;left:0;top:100%;margin:0;padding:8px 0;list-style:none;
  min-width:240px;background:#fff;border:1px solid #e4eaf2;border-radius:10px;
  box-shadow:0 10px 32px rgba(23,45,94,.14);
  z-index:3000;
}
.nav-dropdown-menu li{margin:0}
.nav-dropdown-menu a{
  display:block;padding:10px 18px;font-size:14px;font-weight:500;color:#444;white-space:nowrap;
}
.nav-dropdown-menu a:hover,.nav-dropdown-menu a.active{background:#f5f8fc;color:#172D5E}
@media (min-width:769px){
  /* 轻微上移与上内边距，避免与导航条之间的“断缝”，并保证浮在页面内容之上 */
  .nav-dropdown-menu{
    top:calc(100% - 4px);
    padding:12px 0 8px;
  }
  .nav-dropdown:hover > .nav-dropdown-menu{display:block}
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  padding:0;
  border:none;
  border-radius:8px;
  background:transparent;
  color:#172D5E;
  cursor:pointer;
  flex-shrink:0;
}
.nav-toggle:hover{background:#eef3fb}
.nav-toggle i{font-size:20px}

.btn-nav{
  display:inline-flex;align-items:center;gap:7px;
  background:#172D5E;color:#fff;padding:10px 22px;
  border-radius:6px;font-size:15px;font-weight:600;
  white-space:nowrap;transition:background .2s;
}
.btn-nav:hover{background:#1e3d7a}

/* ── BUTTONS ─────────────────────────────────────────── */
.btn-orange{
  display:inline-flex;align-items:center;gap:8px;
  background:#F5A623;color:#fff;padding:13px 28px;
  border-radius:6px;font-size:14.5px;font-weight:700;
  border:none;cursor:pointer;transition:background .2s;
}
.btn-orange:hover{background:#df9310}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.12);color:#fff;padding:13px 28px;
  border-radius:6px;font-size:14.5px;font-weight:700;
  border:2px solid rgba(255,255,255,.4);cursor:pointer;transition:all .2s;
}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-solid{
  display:inline-flex;align-items:center;gap:8px;
  background:#172D5E;color:#fff;padding:13px 28px;
  border-radius:6px;font-size:14.5px;font-weight:700;
  border:none;cursor:pointer;transition:background .2s;
}
.btn-solid:hover{background:#1e3d7c}

/* ── HERO SHARED ─────────────────────────────────────── */
.hero{position:relative;min-height:600px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;background-size:cover;background-position:center}
.hero-overlay{
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(105deg,rgba(23,45,94,.97) 0%,rgba(23,45,94,.88) 42%,rgba(23,45,94,.45) 65%,transparent 85%);
}
.hero-content{position:relative;z-index:2;padding:64px 56px;max-width:600px}
.hero-content h1{font-size:44px;font-weight:800;color:#fff;line-height:1.13;margin-bottom:14px}
.hero-content h1 span{color:#F5A623}
.hero-content p{font-size:17px;font-weight:500;color:#cde0ff;margin-bottom:32px;line-height:1.6}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}

/* ── SECTION LAYOUT ──────────────────────────────────── */
.section-inner{max-width:var(--page-max-width);margin:0 auto;padding:0 56px}
.section-title{font-size:28px;font-weight:800;color:#172D5E;margin-bottom:10px}
.section-sub{font-size:15px;color:#666;line-height:1.75;margin-bottom:36px}

/* ── FEATURE CARDS (3-col) ───────────────────────────── */
.feat3{padding:48px 0;background:#fff;border-top:1px solid #e4eaf2;border-bottom:1px solid #e4eaf2}
.feat3-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#e4eaf2}
.feat3-card{
  background:#fff;padding:32px 36px;
  display:flex;flex-direction:column;gap:14px;
}
.feat3-icon{
  width:54px;height:54px;border-radius:12px;
  background:linear-gradient(135deg,#edf3ff 0%,#dae8ff 100%);
  border:1.5px solid #c8d8f0;
  display:flex;align-items:center;justify-content:center;
}
.feat3-icon i{font-size:24px;color:#172D5E}
.feat3-card h3{font-size:18px;font-weight:700;color:#172D5E}
.feat3-card p{font-size:14px;color:#666;line-height:1.65}

/* ── CTA BANNER ──────────────────────────────────────── */
.cta-banner{background:#172D5E;padding:56px 0}
.cta-inner{max-width:var(--page-max-width);margin:0 auto;padding:0 56px;display:flex;align-items:center;gap:40px;flex-wrap:wrap}
.cta-text{flex:1;min-width:280px}
.cta-text h2{font-size:26px;font-weight:800;color:#fff;margin-bottom:12px}
.cta-text p{font-size:14px;color:#a0bed8;line-height:1.75;max-width:460px}
.cta-btns{display:flex;gap:14px;flex-wrap:wrap}

/* ── FOOTER ──────────────────────────────────────────── */
footer{
  background:#fff;padding:18px 56px;
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid #e4eaf2;flex-wrap:wrap;gap:14px;
  max-width:var(--page-max-width);width:100%;margin-left:auto;margin-right:auto;
}
.footer-legal{font-size:13px;color:#888;display:flex;align-items:center;gap:14px}
.footer-legal a{color:#666;transition:color .2s}
.footer-legal a:hover{color:#172D5E}
.footer-legal .sep{color:#ccc}
.footer-flags{display:flex;align-items:center;gap:6px}
.flag-img{width:26px;height:26px;border-radius:50%;object-fit:cover;border:1px solid #ddd}
.footer-social{display:flex;gap:10px}
.social-icon{
  width:34px;height:34px;border-radius:50%;background:#172D5E;
  display:flex;align-items:center;justify-content:center;color:#fff;transition:background .2s;
}
.social-icon i{font-size:14px}
.social-icon:hover{background:#1a6fc4}

/* ── RESPONSIVE ──────────────────────────────────────── */
@media(max-width:1024px){
  nav{padding:0 24px}
  .section-inner{padding:0 24px}
  .hero-content{padding:48px 24px}
  .cta-inner{padding:0 24px}
  footer{padding:16px 24px}
}
@media(max-width:768px){
  nav{
    flex-wrap:nowrap;
    align-items:center;
    justify-content:space-between;
    height:auto;
    min-height:56px;
    padding:12px 20px;
    column-gap:12px;
  }
  .logo{flex-shrink:0}
  .btn-nav{margin-left:auto;flex-shrink:0}
  /* FAB: fixed bottom-right (out of header flow) */
  .nav-toggle{
    display:inline-flex;
    position:fixed;
    bottom:calc(22px + env(safe-area-inset-bottom,0px));
    right:calc(22px + env(safe-area-inset-right,0px));
    left:auto;
    top:auto;
    z-index:1100;
    width:52px;
    height:52px;
    border-radius:14px;
    background:#fff;
    color:#172D5E;
    border:1px solid #d0daea;
    box-shadow:0 6px 28px rgba(23,45,94,.18);
  }
  .nav-toggle:hover{background:#f5f8fc}
  .nav-toggle i{font-size:22px}
  .nav-links{
    display:none;
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    width:100%;
    max-height:min(78vh,520px);
    margin:0;
    padding:16px 8px calc(20px + env(safe-area-inset-bottom,0px));
    flex-direction:column;
    align-items:stretch;
    gap:0;
    list-style:none;
    overflow-y:auto;
    border-top:1px solid #e4eaf2;
    border-radius:16px 16px 0 0;
    background:#fff;
    box-shadow:0 -10px 40px rgba(23,45,94,.12);
    z-index:1050;
  }
  .nav-links li{border-bottom:1px solid #f0f3f7}
  .nav-links li:last-child{border-bottom:none}
  .nav-dropdown{border-bottom:1px solid #f0f3f7}
  .nav-dropdown-row{width:100%}
  .nav-dropdown-caret{display:inline-flex}
  .nav-dropdown:hover > .nav-dropdown-menu{display:none}
  .nav-dropdown.nav-dropdown--open > .nav-dropdown-menu{
    display:block;position:static;margin:0 0 4px;padding:4px 0 8px 8px;
    border:none;border-radius:0;box-shadow:none;
    border-left:2px solid #e4eaf2;min-width:0;background:transparent;
  }
  .nav-dropdown-menu a{padding:10px 14px;font-size:15px;white-space:normal}
  .nav-links a{
    display:block;
    padding:14px 16px;
    font-size:16px;
    white-space:normal;
  }
  .nav-dropdown-row > a{padding-right:0}
  nav.nav-open .nav-links{display:flex}
  .hero-content h1{font-size:30px}
  .feat3-grid{grid-template-columns:1fr}
}