/* ============================================
   温州瓯启建筑劳务有限公司 - 官网样式
   ============================================ */

:root {
  --primary: #C2780A;
  --primary-dark: #8B5806;
  --primary-light: #F5E6CC;
  --dark: #1a1a1a;
  --gray: #666;
  --light: #f8f7f4;
  --white: #fff;
  --border: #e8e5df;
  --radius: 6px;
  --shadow: 0 2px 20px rgba(0,0,0,0.06);
  --font: -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
}

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

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

body {
  font-family:var(--font); color:var(--dark); background:var(--white);
  line-height:1.7; overflow-x:hidden;
}

.container { max-width:1280px; margin:0 auto; padding:0 24px; }
a { text-decoration:none; color:inherit; }
img { max-width:100%; display:block; }

/* ===== HEADER ===== */
.header { position:fixed; top:0; left:0; right:0; z-index:1000; }
.head-top {
  background:var(--dark); color:#aaa; font-size:13px;
  padding:6px 0;
}
.head-top .top-inner {
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:8px;
}
.head-top a { color:var(--primary); transition:color .2s; }
.head-top a:hover { color:var(--primary-light); }

.head-main {
  background:rgba(26,26,26,0.95); backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.head-inner {
  display:flex; align-items:center; justify-content:space-between;
  height:68px;
}

.logo a {
  display:flex; align-items:center; gap:10px;
}
.logo-icon {
  width:40px; height:40px; border-radius:8px; object-fit:contain;
}
.logo-text strong { display:block; color:white; font-size:17px; line-height:1.2; }
.logo-text small { color:#999; font-size:9px; letter-spacing:1px; }

.nav { display:flex; align-items:center; gap:4px; }
.nav a, .nav .drop-trigger {
  color:#bbb; padding:8px 14px; border-radius:4px; font-size:14px; transition:all .2s;
  cursor:pointer; white-space:nowrap;
}
.nav a:hover, .nav a.active, .nav .drop-trigger:hover { color:var(--primary); background:rgba(194,120,10,0.1); }

.nav-drop { position:relative; }
.nav-drop:hover .drop-menu { display:block; }
.drop-menu {
  display:none; position:absolute; top:100%; left:0; min-width:140px;
  background:var(--dark); border:1px solid rgba(255,255,255,0.1); border-radius:6px;
  padding:8px 0; z-index:10;
}
.drop-menu a { display:block; padding:8px 20px; font-size:13px; border-radius:0; }
.drop-menu a:hover { color:var(--primary); background:rgba(194,120,10,0.1); }

.head-tel { color:var(--primary); font-size:15px; font-weight:600; }
.menu-btn { display:none; background:none; border:none; color:white; font-size:26px; cursor:pointer; }

/* ===== HERO ===== */
.hero {
  position:relative; min-height:100vh; display:flex; align-items:center;
  color:white; text-align:center; margin-top:-1px;
}
.hero-img { position:absolute; inset:0; }
.hero-img img { width:100%; height:100%; object-fit:cover; }
.hero-overlay {
  position:absolute; inset:0;
  background:linear-gradient(135deg,rgba(0,0,0,0.75) 0%,rgba(0,0,0,0.5) 60%,rgba(0,0,0,0.3) 100%);
}
.hero-content { position:relative; z-index:1; max-width:900px; padding:120px 24px 60px; }
.hero h1 { font-size:46px; font-weight:800; margin-bottom:16px; line-height:1.3; }
.hero h2 { font-size:22px; color:var(--primary); margin-bottom:20px; font-weight:500; }
.hero p { font-size:16px; color:#ccc; margin-bottom:10px; line-height:1.8; }
.hero-btns { display:flex; gap:16px; justify-content:center; margin-top:36px; flex-wrap:wrap; }

/* ===== BUTTONS ===== */
.btn { display:inline-block; padding:14px 36px; border-radius:6px; font-size:16px; font-weight:600;
  cursor:pointer; transition:all .3s; border:2px solid transparent; }
.btn-primary { background:linear-gradient(135deg,var(--primary),var(--primary-dark)); color:white; }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(194,120,10,0.4); }
.btn-outline { background:transparent; color:white; border-color:rgba(255,255,255,0.4); }
.btn-outline:hover { background:rgba(255,255,255,0.1); border-color:white; }
.btn-white { background:white; color:var(--dark); font-weight:700; }
.btn-white:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(0,0,0,0.2); }
.btn-block { width:100%; }

/* ===== BREADCRUMB ===== */
.breadcrumb { background:var(--light); padding:12px 0; font-size:13px; color:var(--gray); margin-top:68px; }
.breadcrumb a { color:var(--primary); }
.breadcrumb span { color:#bbb; margin:0 4px; }

/* ===== SECTIONS ===== */
.section { padding:80px 0; }
.section-header { text-align:center; margin-bottom:50px; }
.tag {
  display:inline-block; font-size:12px; letter-spacing:4px; color:var(--primary);
  font-weight:700; margin-bottom:10px; text-transform:uppercase;
}
.section-header h2 { font-size:32px; font-weight:800; margin-bottom:10px; }
.section-header p { font-size:16px; color:var(--gray); }

/* ===== SERVICE CARDS ===== */
.service-grid { display:grid; grid-template-columns:repeat(3, 1fr); gap:24px; }
.service-card {
  background:white; border:1px solid var(--border); border-radius:12px;
  overflow:hidden; transition:all .3s;
}
.service-card:hover { transform:translateY(-6px); box-shadow:var(--shadow); }
.card-img { height:220px; overflow:hidden; }
.card-img img { width:100%; height:100%; object-fit:cover; transition:transform .4s; }
.service-card:hover .card-img img { transform:scale(1.08); }
.card-body { padding:24px; }
.card-num { font-size:36px; font-weight:800; color:var(--primary); opacity:0.3; line-height:1; }
.card-body h3 { font-size:20px; margin:8px 0 12px; }
.card-body p { color:var(--gray); font-size:14px; margin-bottom:12px; line-height:1.7; }
.card-body ul { display:flex; flex-wrap:wrap; gap:6px; }
.card-body ul li {
  background:var(--primary-light); color:var(--primary-dark); padding:4px 12px;
  border-radius:20px; font-size:12px; font-weight:600;
}

/* ===== FOUNDATION SERVICES TABS ===== */
.foundation-services { background:var(--light); }
.f-tabs {
  display:flex; justify-content:center; gap:4px; margin-bottom:40px;
  flex-wrap:wrap;
}
.f-tab {
  padding:12px 28px; background:white; border:1px solid var(--border);
  border-radius:6px; font-size:15px; cursor:pointer; transition:all .2s;
  font-family:var(--font); color:var(--dark);
}
.f-tab:hover, .f-tab.active { background:var(--primary); color:white; border-color:var(--primary); }
.f-panel { display:none; animation:fadeIn .4s; }
.f-panel.active { display:block; }
.f-row { display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; }
.f-img { border-radius:12px; overflow:hidden; }
.f-img img { width:100%; height:380px; object-fit:cover; }
.f-text h3 { font-size:24px; margin-bottom:16px; }
.f-text p { color:var(--gray); margin-bottom:12px; line-height:1.8; }
.f-text p:last-child { color:var(--primary); font-weight:600; }
@keyframes fadeIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }

/* ===== PROBLEMS ===== */
.problem-grid {
  display:grid; grid-template-columns:repeat(4, 1fr); gap:20px;
}
.problem-item { text-align:center; }
.p-img {
  border-radius:8px; overflow:hidden; margin-bottom:12px;
  aspect-ratio:4/3;
}
.p-img img { width:100%; height:100%; object-fit:cover; }
.problem-item p { font-size:14px; font-weight:600; }

/* ===== CTA ===== */
.cta { padding:0 0 80px; }
.cta-box {
  background:linear-gradient(135deg,var(--dark),#2a2520);
  border-radius:16px; padding:48px; display:flex; justify-content:space-between;
  align-items:center; color:white; gap:24px;
}
.cta-left h3 { font-size:26px; margin-bottom:12px; }
.cta-left p { color:#bbb; margin-bottom:8px; }
.cta-left small { color:#888; font-size:12px; }
.cta-right { flex-shrink:0; }

/* ===== ADVANTAGES ===== */
.advantage-grid { display:grid; grid-template-columns:repeat(3, 1fr); gap:24px; }
.adv-item {
  text-align:center; padding:36px 24px; background:var(--light);
  border-radius:12px; transition:all .3s; border:1px solid transparent;
}
.adv-item:hover { background:white; border-color:var(--primary); transform:translateY(-4px); box-shadow:var(--shadow); }
.adv-icon { font-size:40px; margin-bottom:16px; }
.adv-item h4 { font-size:18px; margin-bottom:8px; }
.adv-item p { color:var(--gray); font-size:14px; line-height:1.7; }

/* ===== CASES ===== */
.cases { background:var(--light); }
.case-grid { display:grid; grid-template-columns:repeat(4, 1fr); gap:20px; }
.case-item {
  background:white; border-radius:12px; overflow:hidden;
  transition:all .3s; border:1px solid var(--border);
}
.case-item:hover { transform:translateY(-6px); box-shadow:var(--shadow); }
.case-img { height:200px; overflow:hidden; }
.case-img img { width:100%; height:100%; object-fit:cover; transition:transform .4s; }
.case-item:hover .case-img img { transform:scale(1.08); }
.case-text { padding:20px; }
.case-tag {
  display:inline-block; background:var(--primary-light); color:var(--primary-dark);
  padding:3px 10px; border-radius:20px; font-size:11px; font-weight:600; margin-bottom:8px;
}
.case-text h4 { font-size:16px; margin-bottom:6px; }
.case-text p { color:var(--gray); font-size:13px; margin-bottom:10px; }
.case-meta { display:flex; gap:10px; }
.case-meta span { font-size:12px; color:#aaa; background:#f0f0f0; padding:2px 8px; border-radius:4px; }

/* ===== PROCESS ===== */
.process-steps {
  display:flex; justify-content:center; align-items:flex-start; gap:8px; flex-wrap:wrap;
}
.step { text-align:center; padding:24px 20px; }
.step-num {
  width:50px; height:50px; background:var(--primary); color:white;
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  margin:0 auto 12px; font-size:20px; font-weight:800;
}
.step h4 { font-size:15px; margin-bottom:4px; }
.step p { font-size:12px; color:var(--gray); }
.step-arrow { font-size:28px; color:var(--primary); padding-top:30px; }

/* ===== CONTACT ===== */
.contact-grid { display:grid; grid-template-columns:1fr 1.2fr; gap:48px; }
.info-item { display:flex; gap:14px; margin-bottom:24px; align-items:flex-start; }
.info-icon {
  width:44px; height:44px; background:var(--primary-light); border-radius:10px;
  display:flex; align-items:center; justify-content:center; font-size:20px; flex-shrink:0;
}
.info-item strong { display:block; font-size:15px; margin-bottom:4px; }
.info-item p { color:var(--gray); font-size:14px; }
.contact-form { background:var(--light); padding:36px; border-radius:12px; }
.contact-form h3 { font-size:20px; margin-bottom:24px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.input {
  width:100%; padding:14px 16px; border:1px solid var(--border); border-radius:8px;
  font-size:15px; font-family:var(--font); transition:all .2s; margin-bottom:14px;
  background:white;
}
.input:focus { outline:none; border-color:var(--primary); box-shadow:0 0 0 3px rgba(194,120,10,0.1); }
.textarea { resize:vertical; min-height:120px; }

/* ===== FOOTER ===== */
.footer { background:var(--dark); color:#bbb; padding-top:60px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; padding-bottom:40px; }
.footer-col h3, .footer-col h4 { color:white; margin-bottom:16px; }
.footer-col h3 { font-size:18px; }
.footer-col h4 { font-size:15px; }
.footer-col p { font-size:13px; line-height:1.8; }
.footer-col a { display:block; padding:5px 0; font-size:13px; transition:all .2s; }
.footer-col a:hover { color:var(--primary); padding-left:6px; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.06); padding:20px 0; text-align:center; font-size:12px; }

/* ===== RESPONSIVE ===== */
@media (max-width:1024px) {
  .service-grid, .advantage-grid { grid-template-columns:repeat(2, 1fr); }
  .case-grid { grid-template-columns:repeat(2, 1fr); }
  .f-row { grid-template-columns:1fr; }
  .f-img img { height:260px; }
  .problem-grid { grid-template-columns:repeat(2, 1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
}
@media (max-width:768px) {
  .hero h1 { font-size:28px; }
  .hero h2 { font-size:16px; }
  .hero p { font-size:14px; }
  .nav { display:none; }
  .nav.open { display:flex; flex-direction:column; position:absolute; top:68px; left:0; right:0;
    background:var(--dark); padding:16px; }
  .menu-btn { display:block; }
  .head-top { display:none; }
  .head-tel { display:none; }
  .service-grid, .advantage-grid { grid-template-columns:1fr; }
  .case-grid { grid-template-columns:1fr; }
  .problem-grid { grid-template-columns:repeat(2, 1fr); }
  .contact-grid { grid-template-columns:1fr; }
  .process-steps { flex-direction:column; align-items:center; }
  .step-arrow { transform:rotate(90deg); }
  .f-tabs { gap:8px; }
  .f-tab { padding:10px 16px; font-size:13px; }
  .section-header h2 { font-size:26px; }
  .cta-box { flex-direction:column; text-align:center; }
  .footer-grid { grid-template-columns:1fr; gap:24px; }
}
@media (max-width:480px) {
  .hero h1 { font-size:22px; }
  .problem-grid { grid-template-columns:1fr 1fr; }
  .form-row { grid-template-columns:1fr; }
}


/* 压紧业务范围到技术优势之间的间距 */
.foundation-services { padding-bottom: 40px; }
.problems { padding-top: 40px; padding-bottom: 40px; }
.cta { padding-top: 0; padding-bottom: 0; }
.cta-box { margin-bottom: 40px; }