/* ============================================================
   智途方略（深圳）信息咨询有限公司 — 官方网站样式
   品牌色：深蓝 #0F2B46 / 橙色 #E8792B / 浅灰 #F5F7FA
   ============================================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --blue-dark:  #0F2B46;
  --blue-mid:   #1B3A5C;
  --blue-light: #2A5A8C;
  --orange:     #E8792B;
  --orange-light:#F09A5A;
  --bg-light:   #F5F7FA;
  --bg-white:   #FFFFFF;
  --text-dark:  #1A1A2E;
  --text-body:  #4A4A5A;
  --text-light: #8A8A9A;
  --border:     #E0E4EA;
  --shadow:     0 4px 24px rgba(15,43,70,.08);
  --shadow-lg:  0 12px 48px rgba(15,43,70,.12);
  --radius:     12px;
  --radius-sm:  8px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --max-width:  1200px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ---------- Typography ---------- */
h1,h2,h3,h4 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }
h1 { font-size: 2.8rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

.section-label {
  display: inline-block;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 12px;
}

.section-title { margin-bottom: 16px; }
.section-desc { max-width: 640px; margin: 0 auto 48px; color: var(--text-light); font-size: 1.05rem; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: .95rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: all var(--transition);
}
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: #d06820; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,121,43,.35); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.5); }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-outline-dark { background: transparent; color: var(--blue-dark); border: 2px solid var(--border); }
.btn-outline-dark:hover { border-color: var(--orange); color: var(--orange); }
.btn-sm { padding: 10px 24px; font-size: .85rem; }
.btn svg, .btn i { font-size: 1.1em; }

/* ---------- Header / Navbar ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}
.header.scrolled { box-shadow: var(--shadow); }

.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.nav-logo { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 1.25rem; color: var(--blue-dark); }
.nav-logo img { height: 40px; }
.nav-logo span { white-space: nowrap; }

.nav-links { display: flex; gap: 36px; }
.nav-links a {
  font-size: .95rem; font-weight: 500; color: var(--text-body);
  position: relative; padding: 4px 0;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
  background: var(--orange); transition: width var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--blue-dark); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-cta { display: flex; align-items: center; gap: 16px; }

.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-dark); transition: all var(--transition); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  background: linear-gradient(135deg, var(--blue-dark) 0%, #162D4A 40%, var(--blue-mid) 100%);
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg-pattern {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(232,121,43,.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(42,90,140,.15) 0%, transparent 50%);
}

.hero-grid {
  position: absolute; inset: 0; opacity: .04;
  background-image:
    linear-gradient(rgba(255,255,255,.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.3) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content { position: relative; z-index: 2; max-width: 680px; }
.hero-content .section-label { color: var(--orange-light); }
.hero-content h1 { color: #fff; margin-bottom: 24px; font-size: 3rem; line-height: 1.25; }
.hero-content h1 span { color: var(--orange); }
.hero-content p { color: rgba(255,255,255,.75); font-size: 1.15rem; margin-bottom: 40px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: repeat(3,1fr); gap: 24px;
  margin-top: 64px; padding-top: 48px;
  border-top: 1px solid rgba(255,255,255,.12);
}
.hero-stat h3 { color: var(--orange); font-size: 2.2rem; margin-bottom: 4px; }
.hero-stat p { color: rgba(255,255,255,.6); font-size: .9rem; }

/* Floating globe decoration */
.hero-visual {
  position: absolute; right: -5%; top: 50%; transform: translateY(-50%);
  width: 560px; height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(42,90,140,.3), rgba(15,43,70,.6));
  border: 1px solid rgba(255,255,255,.06);
  opacity: .5;
}
.hero-visual::before {
  content: ''; position: absolute; inset: 40px;
  border-radius: 50%;
  border: 1px dashed rgba(255,255,255,.08);
  animation: spin 60s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Section Spacing ---------- */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-light); }

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 40px 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--orange); transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 56px; height: 56px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-light));
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px; font-size: 1.5rem; color: #fff;
}

.service-card h3 { margin-bottom: 12px; }
.service-card p { font-size: .92rem; color: var(--text-light); line-height: 1.7; }
.service-card .learn-more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 20px; font-size: .85rem; font-weight: 600; color: var(--orange);
}
.service-card .learn-more::after { content: '\2192'; transition: transform var(--transition); }
.service-card:hover .learn-more::after { transform: translateX(4px); }

/* ---------- Why Us / Advantages ---------- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 32px;
}

.advantage-card {
  text-align: center;
  padding: 48px 32px;
  border-radius: var(--radius);
  background: var(--bg-white);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.advantage-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }

.advantage-icon {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px; font-size: 1.8rem;
  transition: all var(--transition);
}
.advantage-card:hover .advantage-icon { background: var(--orange); color: #fff; }

.advantage-card h3 { margin-bottom: 12px; }
.advantage-card p { font-size: .92rem; color: var(--text-light); }

/* ---------- Process / How We Work ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(5,1fr);
  gap: 16px;
  position: relative;
}
.process-steps::before {
  content: ''; position: absolute; top: 36px; left: 10%; right: 10%;
  height: 2px; background: var(--border);
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-number {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--bg-white);
  border: 3px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.4rem; font-weight: 700; color: var(--blue-dark);
  transition: all var(--transition);
}
.process-step:hover .step-number {
  background: var(--orange); border-color: var(--orange); color: #fff;
}
.process-step h4 { margin-bottom: 8px; }
.process-step p { font-size: .85rem; color: var(--text-light); }

/* ---------- Insights / Articles ---------- */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 28px;
}

.insight-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-white);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.insight-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

.insight-img {
  height: 200px;
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-mid));
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.3); font-size: 3rem;
  position: relative; overflow: hidden;
}
.insight-img .tag {
  position: absolute; top: 16px; left: 16px;
  background: var(--orange); color: #fff;
  padding: 4px 14px; border-radius: 50px;
  font-size: .75rem; font-weight: 600;
}

.insight-body { padding: 24px; }
.insight-body .date { font-size: .8rem; color: var(--text-light); margin-bottom: 8px; }
.insight-body h3 { font-size: 1.1rem; margin-bottom: 10px; }
.insight-body p { font-size: .88rem; color: var(--text-light); line-height: 1.6; }

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-mid));
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(232,121,43,.1), transparent 70%);
}
.cta-banner h2 { color: #fff; margin-bottom: 16px; position: relative; }
.cta-banner p { color: rgba(255,255,255,.7); margin-bottom: 36px; font-size: 1.05rem; position: relative; }
.cta-banner .btn { position: relative; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info-list { display: flex; flex-direction: column; gap: 28px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--orange);
  flex-shrink: 0;
}
.contact-item h4 { margin-bottom: 4px; font-size: .95rem; }
.contact-item p { font-size: .9rem; color: var(--text-light); }

.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; color: var(--text-dark); margin-bottom: 8px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .92rem; font-family: inherit;
  transition: border-color var(--transition);
  background: var(--bg-light);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--orange); background: var(--bg-white);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---------- Footer ---------- */
.footer {
  background: var(--blue-dark);
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.footer-brand p { font-size: .88rem; line-height: 1.8; margin-top: 16px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 1.15rem; }

.footer h4 { color: #fff; font-size: .95rem; margin-bottom: 20px; }
.footer-links a { display: block; padding: 6px 0; font-size: .88rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--orange); }

.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px 0;
  font-size: .8rem;
  color: rgba(255,255,255,.4);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: var(--orange); }
.beian-info { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.beian-info a { display: inline-flex; align-items: center; gap: 4px; }

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--orange); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; cursor: pointer;
  opacity: 0; transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
  border: none;
  box-shadow: 0 4px 16px rgba(232,121,43,.3);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: #d06820; transform: translateY(-2px); }

/* ---------- Animations ---------- */
.fade-up {
  opacity: 0; transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2,1fr); }
  .process-steps { grid-template-columns: repeat(3,1fr); }
  .process-steps::before { display: none; }
  .hero-visual { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .hero-content h1 { font-size: 2.2rem; }
  .section { padding: 64px 0; }

  .nav-links { display: none; }
  .nav-cta .btn { display: none; }
  .hamburger { display: flex; }

  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--bg-white);
    padding: 24px; gap: 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .services-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 32px; }
  .insights-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; gap: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}