/* ============================================
   中承盛数字文化（重庆）有限公司 - 官网样式
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #1a3a5c;
  --color-primary-light: #2c5f8a;
  --color-accent: #c9a84c;
  --color-accent-light: #e0c878;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fa;
  --color-bg-dark: #0f2137;
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-text-on-dark: #e2e8f0;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, .1);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, .12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: 0.3s ease;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ---------- Header / Navigation ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

.logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 20px;
  font-weight: 700;
}

.logo-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.nav-list {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0a1929 0%, #1a365d 40%, #1a3a5c 70%, #0f2137 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(201,168,76,0.08) 0%, transparent 70%);
  animation: heroPulse 8s ease-in-out infinite alternate;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30%;
  background: linear-gradient(to top, rgba(10,25,41,0.6), transparent);
  pointer-events: none;
}

@keyframes heroPulse {
  0% { opacity: 0.5; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.05); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.03) 1px, transparent 1px),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px, 40px 40px;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
  padding: 120px 24px 80px;
}

.hero-subtitle {
  font-size: 18px;
  letter-spacing: 4px;
  color: var(--color-accent-light);
  margin-bottom: 20px;
  font-weight: 400;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: 2px;
}

.hero-title .highlight {
  color: var(--color-accent);
}

.hero-desc {
  font-size: 17px;
  line-height: 1.9;
  color: var(--color-text-on-dark);
  margin-bottom: 40px;
  opacity: 0.85;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  letter-spacing: 1px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201,168,76,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
  text-align: center;
}

/* Hero Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 13px;
}

.scroll-icon {
  width: 24px;
  height: 36px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  position: relative;
}

.scroll-icon::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0%, 100% { top: 6px; opacity: 1; }
  50% { top: 18px; opacity: 0.3; }
}

/* ---------- Section Common ---------- */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-label {
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-divider {
  width: 50px;
  height: 3px;
  background: var(--color-accent);
  margin: 0 auto;
  border-radius: 2px;
}

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

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.about-text h3 {
  font-size: 24px;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.about-text p {
  margin-bottom: 16px;
  color: var(--color-text);
  line-height: 1.9;
}

.about-highlights {
  display: flex;
  gap: 40px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.highlight-item {
  text-align: center;
  display: flex;
  flex-direction: column;
}

.highlight-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-heading);
}

.highlight-label {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: 4px;
}

.about-image {
  display: flex;
  justify-content: center;
}

.image-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: linear-gradient(135deg, var(--color-bg-alt), #edf2f7);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
}

.placeholder-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--color-primary-light);
}

.placeholder-inner span {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 2px;
}

/* ---------- Business Section ---------- */
.business {
  background: var(--color-bg-alt);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.business-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.business-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.business-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,58,92,0.06);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  color: var(--color-primary);
  transition: all var(--transition);
}

.business-card:hover .card-icon {
  background: var(--color-primary);
  color: var(--color-accent);
}

.business-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.business-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ---------- Culture Section ---------- */
.culture {
  background: var(--color-bg);
}

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

.culture-item {
  text-align: center;
  padding: 32px 20px;
  transition: all var(--transition);
}

.culture-icon-wrap {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  background: rgba(201,168,76,0.1);
  border-radius: 50%;
  color: var(--color-accent);
  transition: all var(--transition);
}

.culture-item:hover .culture-icon-wrap {
  background: var(--color-accent);
  color: var(--color-white);
  transform: scale(1.1);
}

.culture-item h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.culture-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---------- Contact Section ---------- */
.contact {
  background: var(--color-bg-alt);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info h3,
.contact-form-wrap h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 28px;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.info-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.info-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,58,92,0.06);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}

.info-label {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 2px;
}

.info-item > div > p:last-child {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

/* Contact Form */
.contact-form {
  background: var(--color-white);
  padding: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.required {
  color: #e53e3e;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-family: var(--font-body);
  transition: all var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(44,95,138,0.1);
  background: var(--color-white);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo .logo-icon {
  background: var(--color-accent);
  color: var(--color-primary);
}

.footer-logo .logo-text {
  color: var(--color-white);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  opacity: 0.7;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-white);
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  font-size: 14px;
  opacity: 0.7;
  transition: all var(--transition);
}

.footer-links ul li a:hover {
  opacity: 1;
  color: var(--color-accent-light);
}

.footer-contact p {
  font-size: 14px;
  line-height: 2;
  opacity: 0.7;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  opacity: 0.7;
}

.footer-beian a {
  opacity: 0.8;
  transition: opacity var(--transition);
}

.footer-beian a:hover {
  opacity: 1;
  color: var(--color-accent-light);
}

.beian-divider {
  margin: 0 8px;
  opacity: 0.4;
}

/* ---------- Fade-Up Animation ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

.fade-up.delay-1 { animation-delay: 0.15s; }
.fade-up.delay-2 { animation-delay: 0.3s; }
.fade-up.delay-3 { animation-delay: 0.45s; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll-triggered reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .business-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .culture-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 32px;
  }
  .hero-subtitle {
    font-size: 15px;
    letter-spacing: 2px;
  }
  .hero-desc {
    font-size: 15px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .about-image {
    order: -1;
  }

  .business-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 28px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  /* Mobile Nav */
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-white);
    padding: 100px 32px 40px;
    box-shadow: var(--shadow-lg);
    transition: right var(--transition);
  }

  .nav.open {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: 4px;
  }

  .nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .about-highlights {
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .highlight-number {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 26px;
  }
  .hero-btns {
    flex-direction: column;
    align-items: center;
  }
  .btn {
    width: 100%;
    text-align: center;
  }
  .section {
    padding: 60px 0;
  }
  .section-header {
    margin-bottom: 40px;
  }
  .contact-form {
    padding: 20px;
  }
}