/* ========================================
   河南正达软件科技有限公司 - 官网样式
   商业化 · 简约 · 大方 · 响应式
   ======================================== */

:root {
  --color-primary: #006D77;
  --color-primary-dark: #005A63;
  --color-primary-light: #0A9396;
  --color-accent: #0A9396;
  --color-dark: #031B4E;
  --color-dark-2: #0B1D3A;
  --color-text: #2D3748;
  --color-text-light: #718096;
  --color-text-muted: #A0AEC0;
  --color-bg: #F7FAFC;
  --color-bg-warm: #FEFEFE;
  --color-border: #E2E8F0;
  --color-card-bg: #FFFFFF;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Noto Sans SC', 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--color-text);
  background: var(--color-bg-warm);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { text-decoration: none; color: inherit; transition: var(--transition); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   Loading Screen
   ======================================== */
.loading-screen {
  position: fixed; inset: 0;
  z-index: 9999;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 100%);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
  opacity: 0; visibility: hidden; pointer-events: none;
}
.loading-screen.show { opacity: 1; visibility: visible; pointer-events: auto; }
.loading-screen.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loading-content { text-align: center; color: #fff; }
.loading-logo {
  font-size: 2.5rem; font-weight: 700; letter-spacing: 4px;
  margin-bottom: 16px; opacity: 0.95;
}
.loading-text {
  font-size: 1rem; font-weight: 300; letter-spacing: 2px;
  opacity: 0.7; margin-bottom: 32px;
}
.loading-bar {
  width: 200px; height: 2px;
  background: rgba(255,255,255,0.15);
  border-radius: 2px; overflow: hidden; margin: 0 auto;
}
.loading-progress {
  height: 100%; width: 0%;
  background: rgba(255,255,255,0.8);
  border-radius: 2px;
  animation: loadProgress 1.8s ease forwards;
}
@keyframes loadProgress {
  0% { width: 0; }
  50% { width: 65%; }
  100% { width: 100%; }
}

/* ========================================
   Header
   ======================================== */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  background: transparent;
  transition: var(--transition);
  padding: 0;
}
.header.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}
.header.scrolled .logo-text { color: var(--color-dark); }
.header.scrolled .nav-link { color: var(--color-text); }
.header.scrolled .nav-link:hover { color: var(--color-primary); }
.header.scrolled .menu-toggle span { background: var(--color-dark); }

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

.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.3rem; font-weight: 700;
}
.logo-icon {
  width: 38px; height: 38px;
  background: var(--color-primary);
  color: #fff; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 700;
}
.logo-text { color: #fff; letter-spacing: 1px; }

.nav { display: flex; gap: 36px; }
.nav-link {
  font-size: 0.9rem; font-weight: 500;
  color: rgba(255,255,255,0.85);
  position: relative; padding: 4px 0;
}
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px; background: var(--color-accent);
  transition: width 0.3s ease; border-radius: 1px;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.menu-toggle span {
  display: block; width: 24px; height: 2px;
  background: #fff; border-radius: 1px;
  transition: var(--transition);
}

/* ========================================
   Hero
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  background: linear-gradient(135deg, #020c1b 0%, #052c5c 40%, #006d77 100%);
  color: #fff;
  padding: 160px 0 100px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.hero-shape {
  position: absolute; border-radius: 50%;
  background: rgba(255,255,255,0.03);
}
.shape-1 { width: 900px; height: 900px; top: -350px; right: -250px; background: rgba(255,255,255,0.03); }
.shape-2 { width: 700px; height: 700px; bottom: -250px; left: -250px; background: rgba(255,255,255,0.02); }
.shape-3 { width: 600px; height: 600px; top: 35%; left: 50%; background: rgba(10,147,150,0.12); filter: blur(80px); }

.hero-content { max-width: 780px; position: relative; z-index: 2; }
.hero-subtitle {
  font-size: 1rem; font-weight: 500;
  color: var(--color-accent); letter-spacing: 4px;
  text-transform: uppercase; margin-bottom: 24px;
}
.hero-title {
  font-size: 4rem; font-weight: 800;
  line-height: 1.15; margin-bottom: 28px;
  letter-spacing: -1px;
}
.text-accent { color: var(--color-accent); }
.hero-desc {
  font-size: 1.15rem; font-weight: 300;
  color: rgba(255,255,255,0.75);
  line-height: 1.8; margin-bottom: 40px;
  max-width: 640px;
}

.hero-btns { display: flex; gap: 20px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 16px 40px; border-radius: var(--radius-sm);
  font-size: 1rem; font-weight: 500; letter-spacing: 0.5px;
  cursor: pointer; border: none; transition: var(--transition);
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,109,119,0.3);
}
.btn-outline {
  background: transparent;
  color: #fff; border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 80px;
  position: relative; z-index: 2;
}
.stat-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  backdrop-filter: blur(4px);
  transition: var(--transition);
}
.stat-card:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.15);
}
.stat-number {
  font-size: 2.8rem; font-weight: 800;
  color: #fff; line-height: 1;
  margin-bottom: 10px;
}
.stat-plus { color: var(--color-accent); font-size: 1.6rem; }
.stat-label {
  font-size: 0.9rem; font-weight: 400;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.5px;
}

/* ========================================
   Section Common
   ======================================== */
.section { padding: 110px 0; }
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}
.section-tag {
  display: inline-block;
  font-size: 0.75rem; font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 16px;
  padding: 6px 16px;
  background: rgba(0,109,119,0.06);
  border-radius: 20px;
}
.section-title {
  font-size: 2.2rem; font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.section-desc {
  font-size: 1rem; font-weight: 400;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ========================================
   About
   ======================================== */
.about { background: var(--color-bg); }

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 64px;
}
.about-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}
.about-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,109,119,0.12);
  border-color: rgba(0,109,119,0.2);
}
.about-icon {
  font-size: 2rem; margin-bottom: 20px;
  width: 60px; height: 60px;
  background: linear-gradient(135deg, rgba(0,109,119,0.1), rgba(10,147,150,0.06));
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.about-card:hover .about-icon {
  background: linear-gradient(135deg, rgba(0,109,119,0.18), rgba(10,147,150,0.12));
  transform: scale(1.05);
}
.about-card h3 {
  font-size: 1.15rem; font-weight: 600;
  color: var(--color-dark); margin-bottom: 12px;
}
.about-card p {
  font-size: 0.88rem; color: var(--color-text-light);
  line-height: 1.8;
}

.certs-bar {
  display: flex; flex-wrap: wrap;
  justify-content: center; gap: 16px 32px;
  padding: 28px 32px;
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.cert-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; font-weight: 500;
  color: var(--color-text);
}
.cert-dot {
  width: 6px; height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* ========================================
   Products
   ======================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: var(--color-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s ease;
}
.product-card:hover {
  box-shadow: 0 20px 40px rgba(0,109,119,0.12);
  transform: translateY(-6px);
  border-color: rgba(0,109,119,0.25);
}
.product-card:hover::before { transform: scaleX(1); }

.product-num {
  font-size: 0.75rem; font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.product-card h3 {
  font-size: 1.1rem; font-weight: 600;
  color: var(--color-dark); margin-bottom: 12px;
}
.product-card p {
  font-size: 0.85rem; color: var(--color-text-light);
  line-height: 1.7; margin-bottom: 16px;
}
.product-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.product-tags span {
  font-size: 0.7rem; font-weight: 500;
  color: var(--color-primary);
  background: rgba(0,109,119,0.06);
  padding: 4px 10px; border-radius: 4px;
}

/* ========================================
   Cases
   ======================================== */
.cases { background: var(--color-bg); }

.case-featured {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 28px;
  margin-bottom: 48px;
}
.case-feat-main {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.case-feat-tag {
  display: inline-block;
  font-size: 0.7rem; font-weight: 600;
  color: var(--color-primary);
  background: rgba(0,109,119,0.08);
  padding: 5px 14px; border-radius: 4px;
  margin-bottom: 16px; letter-spacing: 1px;
}
.case-feat-main h3 {
  font-size: 1.5rem; font-weight: 700;
  color: var(--color-dark); margin-bottom: 8px;
}
.case-feat-type {
  font-size: 0.85rem; color: var(--color-text-muted);
  margin-bottom: 16px;
}
.case-feat-desc {
  font-size: 0.9rem; color: var(--color-text-light);
  line-height: 1.8; margin-bottom: 24px;
}
.case-feat-meta {
  display: flex; flex-wrap: wrap; gap: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}
.case-feat-meta span {
  font-size: 0.85rem; color: var(--color-text-light);
}
.case-feat-meta strong {
  color: var(--color-dark); font-weight: 600;
}

.case-feat-side {
  display: flex; flex-direction: column; gap: 20px;
}
.case-feat-item {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--color-border);
  flex: 1;
  transition: var(--transition);
}
.case-feat-item:hover {
  box-shadow: 0 12px 28px rgba(0,109,119,0.1);
  transform: translateY(-4px);
}
.case-feat-item h4 {
  font-size: 1.05rem; font-weight: 600;
  color: var(--color-dark); margin-bottom: 10px;
}
.case-feat-item p {
  font-size: 0.85rem; color: var(--color-text-light);
  line-height: 1.7;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.case-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.case-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 12px 28px rgba(0,109,119,0.1);
  transform: translateY(-4px);
}
.case-name {
  font-size: 1rem; font-weight: 600;
  color: var(--color-dark); margin-bottom: 8px;
}
.case-project {
  font-size: 0.82rem; color: var(--color-text-light);
  line-height: 1.6;
}

/* ========================================
   Clients
   ======================================== */
.clients-list {
  display: flex; flex-wrap: wrap;
  justify-content: center; gap: 12px;
}
.client-item {
  font-size: 0.85rem; font-weight: 500;
  color: var(--color-text);
  background: var(--color-card-bg);
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  cursor: default;
}
.client-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 6px 16px rgba(0,109,119,0.1);
  transform: translateY(-3px);
}

/* ========================================
   Values
   ======================================== */
.values { padding: 0; }
.values-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: #fff;
}
.values-content {
  padding: 80px 64px;
  display: flex; flex-direction: column; justify-content: center;
}
.values-content h2 {
  font-size: 2rem; font-weight: 700;
  margin-bottom: 24px; line-height: 1.3;
}
.values-content p {
  font-size: 0.95rem; font-weight: 300;
  color: rgba(255,255,255,0.75);
  line-height: 1.9; margin-bottom: 32px;
}
.values-quote {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 24px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
}
.quote-mark {
  font-size: 2.5rem; font-weight: 700;
  color: var(--color-accent); line-height: 1;
  font-family: Georgia, serif;
}
.values-quote span:last-child {
  font-size: 1rem; font-weight: 500;
  color: rgba(255,255,255,0.9); font-style: italic;
}

.values-stats {
  display: flex; flex-direction: column;
  justify-content: center;
  padding: 80px 64px;
  background: rgba(255,255,255,0.03);
  gap: 40px;
}
.v-stat { text-align: center; }
.v-stat-num {
  font-size: 3rem; font-weight: 700;
  color: #fff; line-height: 1;
  margin-bottom: 8px;
}
.v-stat-num span {
  font-size: 1.5rem; color: var(--color-accent);
}
.v-stat-label {
  font-size: 0.85rem; font-weight: 400;
  color: rgba(255,255,255,0.6);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 0;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1.3fr 1.3fr 1fr;
  gap: 48px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.2rem; font-weight: 700;
  color: #fff; margin-bottom: 20px;
}
.footer-logo-icon {
  width: 36px; height: 36px;
  background: var(--color-primary);
  color: #fff; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}
.footer-desc {
  font-size: 0.85rem; line-height: 1.8;
  color: rgba(255,255,255,0.55);
  margin-bottom: 20px;
}
.footer-certs {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.footer-certs span {
  font-size: 0.7rem; font-weight: 500;
  color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.06);
  padding: 4px 10px; border-radius: 4px;
}

.footer-contact h4,
.footer-address h4,
.footer-nav h4 {
  font-size: 0.9rem; font-weight: 600;
  color: #fff; margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.contact-row {
  display: flex; flex-direction: column;
  gap: 4px; margin-bottom: 16px;
}
.contact-label {
  font-size: 0.75rem; color: rgba(255,255,255,0.4);
}
.contact-value {
  font-size: 0.88rem; color: rgba(255,255,255,0.8);
  font-weight: 500;
}

.address-item {
  margin-bottom: 14px;
}
.addr-city {
  display: inline-block;
  font-size: 0.7rem; font-weight: 600;
  color: var(--color-accent);
  background: rgba(10,147,150,0.15);
  padding: 3px 10px; border-radius: 4px;
  margin-bottom: 6px;
}
.addr-detail {
  display: block;
  font-size: 0.85rem; color: rgba(255,255,255,0.65);
}

.footer-nav a {
  display: block;
  font-size: 0.85rem; color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-nav a:hover { color: #fff; padding-left: 4px; }

.footer-bottom {
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8rem; color: rgba(255,255,255,0.35);
}

/* ========================================
   Back to Top
   ======================================== */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px;
  width: 44px; height: 44px;
  background: var(--color-primary);
  color: #fff; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; cursor: pointer;
  opacity: 0; visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: var(--shadow-md);
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1; visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-4px);
}

/* ========================================
   Animation
   ======================================== */
[data-animate] {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-animate].animate-in {
  opacity: 1; transform: translateY(0);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 40px; }
  .case-featured { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  html { font-size: 15px; }
  .header-inner { height: 64px; }
  .nav {
    position: fixed; top: 64px; left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column; gap: 0;
    padding: 16px 24px;
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0; visibility: hidden;
    transition: var(--transition);
  }
  .nav.active {
    transform: translateY(0);
    opacity: 1; visibility: visible;
  }
  .nav-link {
    color: var(--color-text) !important;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-link:last-child { border-bottom: none; }
  .menu-toggle { display: flex; }

  .hero { padding: 130px 0 70px; }
  .hero-title { font-size: 2.8rem; }
  .hero-subtitle { font-size: 0.85rem; letter-spacing: 2px; }
  .hero-desc { font-size: 1rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 56px; }
  .stat-card { padding: 28px 16px; }
  .stat-number { font-size: 2.2rem; }

  .about-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .values-inner { grid-template-columns: 1fr; }
  .values-content { padding: 48px 32px; }
  .values-stats { padding: 48px 32px; flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 32px; }

  .footer-main { grid-template-columns: 1fr; gap: 40px; }
  .section { padding: 72px 0; }
  .certs-bar { gap: 10px 20px; }
}

@media (max-width: 480px) {
  .hero { padding: 120px 0 50px; }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 0.8rem; letter-spacing: 1px; }
  .hero-desc { font-size: 0.9rem; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 40px; }
  .stat-card { padding: 20px 10px; }
  .stat-number { font-size: 1.8rem; }
  .stat-label { font-size: 0.75rem; }
  .btn { padding: 14px 28px; font-size: 0.9rem; width: 100%; }
  .section-title { font-size: 1.6rem; }
  .hero-btns { flex-direction: column; }
}