:root {
  --primary: #0a5c8a;
  --primary-dark: #073d5c;
  --primary-light: #1a7ab8;
  --accent: #00b4a6;
  --accent-light: #e8f8f7;
  --gold: #c8a84b;
  --text: #2c3e50;
  --text-light: #6c7a89;
  --bg: #f7f9fb;
  --white: #ffffff;
  --border: #e0e8ef;
  --shadow: 0 4px 20px rgba(10,92,138,0.10);
  --shadow-hover: 0 8px 32px rgba(10,92,138,0.18);
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ========== NAV ========== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
.nav.scrolled { box-shadow: var(--shadow); }

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 20px;
}
.logo-text { line-height: 1.2; }
.logo-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: 0.5px;
}
.logo-en {
  font-size: 11px;
  color: var(--text-light);
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}
.nav-links a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: all .2s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
  background: rgba(10,92,138,0.07);
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white !important;
  padding: 10px 22px !important;
  border-radius: 25px !important;
  font-weight: 600 !important;
  transition: opacity .2s !important;
}
.nav-cta:hover { opacity: 0.9; background: var(--primary) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--primary-dark);
  border-radius: 2px;
  transition: all .3s;
}

/* ========== HERO ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #041e35 0%, #0a3d6b 45%, #0a5c8a 75%, #00695c 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image:
    radial-gradient(circle at 20% 50%, #ffffff 1px, transparent 1px),
    radial-gradient(circle at 80% 20%, #ffffff 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-shapes::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,180,166,0.15), transparent 70%);
  right: -100px; top: -100px;
}
.hero-shapes::after {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200,168,75,0.10), transparent 70%);
  left: 10%; bottom: -100px;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.9);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  margin-bottom: 24px;
}
.hero-badge-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-size: 42px;
  font-weight: 800;
  color: white;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero-title em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.hero-tag {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.85);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #00897b);
  color: white;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .3s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 20px rgba(0,180,166,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,180,166,0.4);
}
.btn-outline {
  background: transparent;
  color: white;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid rgba(255,255,255,0.4);
  transition: all .3s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.stat { text-align: center; }
.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.65);
}

.hero-card {
  background: rgba(255,255,255,0.07);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 20px;
  padding: 32px;
}
.hero-card-title {
  color: rgba(255,255,255,0.5);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.service-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  transition: background .2s;
  cursor: pointer;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
}
.service-list li:hover { background: rgba(255,255,255,0.1); }
.service-list .s-icon {
  width: 36px; height: 36px;
  background: rgba(0,180,166,0.2);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

/* ========== SECTION ========== */
.section {
  padding: 80px 24px;
}
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-bg { background: var(--bg); }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.section-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 16px;
  line-height: 1.3;
}
.section-desc {
  font-size: 16px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ========== SERVICES GRID ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all .3s;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform .3s;
}
.service-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.service-card:hover::before { transform: scaleX(1); }

.s-card-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--accent-light), #d4f1ef);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.s-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
}
.s-card-desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}
.s-card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  opacity: 0;
  transition: opacity .3s;
}
.service-card:hover .s-card-arrow { opacity: 1; }

/* ========== ADVANTAGES ========== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-card {
  text-align: center;
  padding: 36px 24px;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all .3s;
}
.adv-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: var(--accent);
}
.adv-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin: 0 auto 20px;
}
.adv-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
}
.adv-desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ========== ABOUT STRIP ========== */
.about-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-label {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.about-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1.4;
  margin-bottom: 20px;
}
.about-text {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 16px;
}
.about-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}
.about-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text);
}
.about-feature-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.about-visual {
  position: relative;
}
.about-card-main {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 20px;
  padding: 40px;
  color: white;
}
.about-card-main h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.about-stat { text-align: center; }
.about-stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
}
.about-stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
}
.about-card-tag {
  position: absolute;
  bottom: -20px; right: 24px;
  background: var(--gold);
  color: white;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(200,168,75,0.3);
}

/* ========== NEWS ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all .3s;
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.news-img {
  height: 180px;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 40px;
  position: relative;
  overflow: hidden;
}
.news-img img { width: 100%; height: 100%; object-fit: cover; }
.news-body { padding: 24px; }
.news-cat {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}
.news-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-summary {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.news-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-light);
}
.news-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
}

/* ========== CTA STRIP ========== */
.cta-strip {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), #005c6b);
  padding: 72px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-strip::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,180,166,0.2) 0%, transparent 70%);
}
.cta-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.cta-title {
  font-size: 32px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
}
.cta-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
  line-height: 1.8;
}
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ========== CONTACT ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.contact-info-list { display: flex; flex-direction: column; gap: 20px; }
.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.contact-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-label { font-size: 12px; color: var(--text-light); margin-bottom: 4px; }
.contact-val { font-size: 15px; font-weight: 600; color: var(--text); }

.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-form h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 24px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  transition: border-color .2s;
  background: var(--bg);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ========== FOOTER ========== */
.footer {
  background: #041828;
  color: rgba(255,255,255,0.75);
  padding: 56px 24px 24px;
}
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-name { color: white; font-size: 15px; }
.footer-brand .logo-en { color: rgba(255,255,255,0.4); }
.footer-desc {
  font-size: 13px;
  line-height: 1.8;
  margin-top: 16px;
  color: rgba(255,255,255,0.55);
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  transition: color .2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-contact-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
}
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); }

/* ========== PAGE HERO ========== */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 120px 24px 60px;
  text-align: center;
  color: white;
}
.page-hero h1 { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: rgba(255,255,255,0.75); }
.breadcrumb {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: white; }

/* ========== MODAL ========== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; pointer-events: none;
  transition: opacity .3s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: white;
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 500px;
  transform: translateY(20px);
  transition: transform .3s;
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal-title {
  font-size: 22px; font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 24px;
}
.modal-close {
  position: absolute; top: 16px; right: 20px;
  font-size: 24px; cursor: pointer; color: var(--text-light);
}

/* ========== TOAST ========== */
.toast {
  position: fixed; bottom: 32px; right: 32px; z-index: 3000;
  background: var(--primary-dark);
  color: white;
  padding: 14px 24px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  transform: translateY(20px);
  opacity: 0;
  transition: all .3s;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-left: 4px solid var(--accent); }

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: white; padding: 16px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }

  .hero-content { grid-template-columns: 1fr; gap: 40px; padding-top: 100px; }
  .hero-title { font-size: 28px; }
  .hero-card { display: none; }
  .hero-stats { gap: 20px; }

  .services-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr 1fr; }
  .about-strip { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  .section { padding: 56px 20px; }
  .section-title { font-size: 26px; }
}

/* ========== BACK TO TOP ========== */
.back-top {
  position: fixed; bottom: 80px; right: 24px; z-index: 500;
  width: 44px; height: 44px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(10,92,138,0.3);
  opacity: 0; transform: translateY(10px);
  transition: all .3s;
  border: none;
  font-size: 18px;
}
.back-top.show { opacity: 1; transform: translateY(0); }
.back-top:hover { background: var(--accent); }

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