/* === C7娱乐官网 style.css === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1a1a2e;
  --secondary: #f0c040;
  --accent: #e94560;
  --bg: #f8f9fa;
  --text: #333;
  --glass: rgba(255, 255, 255, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --radius: 16px;
  --transition: 0.3s ease;
  --gradient-start: #1a1a2e;
  --gradient-mid: #16213e;
  --gradient-end: #0f3460;
  --card-bg: rgba(255, 255, 255, 0.05);
  --border-light: rgba(255, 255, 255, 0.1);
  --text-light: #e0e0e0;
  --bg-dark: #0f0f1a;
  --section-alt: #f0f4f8;
  --section-alt-dark: #1a1a2e;
  --stat-color: #f0c040;
  --hover-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
  --btn-shadow: 0 6px 20px rgba(240, 192, 64, 0.4);
  --gradient-btn: linear-gradient(135deg, #f0c040, #e6b800);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --gradient-about: linear-gradient(135deg, #f8f9fa, #e9ecef);
  --gradient-about-dark: linear-gradient(135deg, #1a1a2e, #16213e);
  --gradient-contact: linear-gradient(135deg, #1a1a2e, #16213e);
  --gradient-advantages: linear-gradient(135deg, #f0f4f8, #e2e8f0);
  --gradient-services: linear-gradient(135deg, #1a1a2e, #16213e);
  --gradient-cases: linear-gradient(135deg, #f0f4f8, #e2e8f0);
  --gradient-news: linear-gradient(135deg, #f0f4f8, #e2e8f0);
  --glass-dark: rgba(255, 255, 255, 0.03);
  --glass-blur: blur(12px);
  --glass-blur-card: blur(8px);
  --glass-blur-nav: blur(12px);
  --glass-blur-partner: blur(4px);
  --glass-blur-timeline: blur(6px);
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --nav-bg: rgba(26, 26, 46, 0.95);
  --nav-bg-mobile: rgba(26, 26, 46, 0.98);
  --hero-glow: radial-gradient(circle at 30% 50%, rgba(240, 192, 64, 0.08) 0%, transparent 50%);
  --text-gradient-hero: linear-gradient(135deg, #f0c040, #fff);
  --text-gradient-title: linear-gradient(135deg, #f0c040, #fff);
  --text-fill-transparent: transparent;
  --btn-outline-border: 2px solid #f0c040;
  --btn-outline-color: #f0c040;
  --btn-outline-hover-bg: #f0c040;
  --btn-outline-hover-color: #1a1a2e;
  --carousel-btn-bg: rgba(255, 255, 255, 0.2);
  --carousel-btn-hover-bg: #f0c040;
  --carousel-btn-hover-color: #1a1a2e;
  --timeline-line: #f0c040;
  --step-bg: #f0c040;
  --step-color: #1a1a2e;
  --faq-border: rgba(0, 0, 0, 0.1);
  --faq-border-dark: rgba(255, 255, 255, 0.1);
  --input-bg: rgba(255, 255, 255, 0.1);
  --input-color: #fff;
  --input-placeholder: #aaa;
  --footer-bg: #0f0f1a;
  --footer-text: #aaa;
  --back-to-top-bg: #f0c040;
  --back-to-top-color: #1a1a2e;
  --lazy-opacity: 0;
  --lazy-loaded-opacity: 1;
}

body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.dark {
  --bg: #0f0f1a;
  --text: #e0e0e0;
  --glass: rgba(255, 255, 255, 0.05);
  --card-bg: rgba(255, 255, 255, 0.03);
  --section-alt: #1a1a2e;
  --gradient-about: var(--gradient-about-dark);
  --gradient-advantages: var(--gradient-about-dark);
  --gradient-cases: var(--gradient-about-dark);
  --gradient-news: var(--gradient-about-dark);
  --faq-border: var(--faq-border-dark);
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.glass {
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 30px;
  background: var(--gradient-btn);
  color: #1a1a2e;
  font-weight: bold;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--btn-shadow);
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 40px;
  color: var(--primary);
}

.dark .section-title {
  color: var(--secondary);
}

.grid {
  display: grid;
  gap: 30px;
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.card {
  background: var(--glass);
  backdrop-filter: var(--glass-blur-card);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--hover-shadow);
}

.dark .card {
  background: var(--card-bg);
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: var(--glass-blur-nav);
  padding: 15px 0;
  transition: var(--transition);
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--secondary);
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 25px;
  list-style: none;
}

.nav-links a {
  color: #fff;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--secondary);
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover {
  color: var(--secondary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 5px;
}

.menu-toggle span {
  width: 28px;
  height: 3px;
  background: var(--secondary);
  border-radius: 2px;
  transition: var(--transition);
}

.dark-toggle {
  background: none;
  border: 2px solid var(--secondary);
  color: var(--secondary);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}

.dark-toggle:hover {
  background: var(--secondary);
  color: var(--primary);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 30px;
  padding: 6px 16px;
}

.search-box input {
  background: none;
  border: none;
  color: #fff;
  outline: none;
  font-size: 0.9rem;
  width: 120px;
}

.search-box input::placeholder {
  color: #aaa;
}

.search-box button {
  background: none;
  border: none;
  color: var(--secondary);
  cursor: pointer;
  font-size: 1.1rem;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: var(--hero-glow);
  animation: heroGlow 8s ease-in-out infinite;
}

@keyframes heroGlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -20px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
  padding: 40px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 20px;
  background: var(--text-gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: var(--text-fill-transparent);
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 30px;
  opacity: 0.9;
}

.hero .btn-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn-outline {
  background: transparent;
  border: var(--btn-outline-border);
  color: var(--btn-outline-color);
}

.hero .btn-outline:hover {
  background: var(--btn-outline-hover-bg);
  color: var(--btn-outline-hover-color);
}

/* Carousel */
.carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-top: 40px;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-item {
  min-width: 100%;
  padding: 40px;
  text-align: center;
  color: #fff;
}

.carousel-item h3 {
  font-size: 2rem;
  margin-bottom: 15px;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--carousel-btn-bg);
  border: none;
  color: #fff;
  font-size: 2rem;
  padding: 10px 18px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  z-index: 2;
}

.carousel-btn:hover {
  background: var(--carousel-btn-hover-bg);
  color: var(--carousel-btn-hover-color);
}

.carousel-btn.prev {
  left: 20px;
}

.carousel-btn.next {
  right: 20px;
}

/* Stats */
.stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
  margin-top: 50px;
}

.stat-item {
  text-align: center;
  color: #fff;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--stat-color);
}

.stat-label {
  font-size: 1rem;
  opacity: 0.8;
  margin-top: 5px;
}

/* About Section */
.about-section {
  background: var(--gradient-about);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-text h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: var(--primary);
}

.dark .about-text h2 {
  color: var(--secondary);
}

.about-text p {
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-image {
  background: var(--gradient-btn);
  border-radius: var(--radius);
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 2rem;
  font-weight: bold;
}

/* Culture Values */
.culture-values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.value-item {
  text-align: center;
  padding: 30px;
}

.value-item svg {
  width: 60px;
  height: 60px;
  margin-bottom: 15px;
}

.value-item h4 {
  margin-bottom: 10px;
  color: var(--secondary);
}

/* Timeline */
.timeline {
  position: relative;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--timeline-line);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  justify-content: flex-start;
  padding: 20px 0;
  position: relative;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  width: 45%;
  background: var(--glass);
  backdrop-filter: var(--glass-blur-timeline);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.timeline-content h4 {
  color: var(--secondary);
  margin-bottom: 8px;
}

/* Products */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.product-card {
  text-align: center;
  padding: 30px;
}

.product-card svg {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
}

.product-card h3 {
  margin-bottom: 12px;
  color: var(--secondary);
}

/* Advantages */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.advantage-item {
  text-align: center;
  padding: 30px;
}

.advantage-item svg {
  width: 50px;
  height: 50px;
  margin-bottom: 15px;
}

/* Solutions */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.solution-item {
  padding: 30px;
  text-align: center;
}

/* Service Steps */
.service-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}

.step {
  text-align: center;
  padding: 30px;
}

.step .step-num {
  width: 50px;
  height: 50px;
  background: var(--step-bg);
  color: var(--step-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 15px;
  font-weight: bold;
  font-size: 1.3rem;
}

/* Partners */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
  align-items: center;
}

.partner-item {
  background: var(--glass);
  backdrop-filter: var(--glass-blur-partner);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  color: var(--text);
  font-weight: 500;
}

/* Cases */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.case-card {
  padding: 30px;
}

.case-card h4 {
  color: var(--secondary);
  margin-bottom: 10px;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.testimonial-card {
  padding: 30px;
  font-style: italic;
}

.testimonial-card .author {
  margin-top: 15px;
  font-weight: bold;
  color: var(--secondary);
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.news-card {
  padding: 25px;
}

.news-card .date {
  color: var(--secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.news-card h4 {
  margin-bottom: 10px;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--faq-border);
  padding: 18px 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
}

.faq-question .icon {
  font-size: 1.5rem;
  transition: var(--transition);
}

.faq-question.active .icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding-top: 0;
}

.faq-answer.open {
  max-height: 300px;
  padding-top: 12px;
}

/* Contact */
.contact-section {
  background: var(--gradient-contact);
  color: #fff;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info h3 {
  color: var(--secondary);
  margin-bottom: 20px;
}

.contact-info p {
  margin-bottom: 12px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px;
  margin-bottom: 15px;
  border: none;
  border-radius: 10px;
  background: var(--input-bg);
  color: var(--input-color);
  font-size: 1rem;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--input-placeholder);
}

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

/* Footer */
footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}

.footer-col h4 {
  color: var(--secondary);
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  color: var(--footer-text);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--secondary);
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  margin-top: 40px;
  padding-top: 30px;
  text-align: center;
  font-size: 0.9rem;
}

.footer-bottom .links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 15px;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--back-to-top-bg);
  color: var(--back-to-top-color);
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  z-index: 999;
  display: none;
  align-items: center;
  justify-content: center;
}

.back-to-top.show {
  display: flex;
}

.back-to-top:hover {
  transform: translateY(-3px);
}

/* Lazy Load */
.lazy {
  opacity: var(--lazy-opacity);
  transition: opacity 0.4s;
}

.lazy.loaded {
  opacity: var(--lazy-loaded-opacity);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--nav-bg-mobile);
    padding: 20px;
    gap: 15px;
  }

  .nav-links.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

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

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

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: row;
  }

  .timeline-content {
    width: 90%;
    margin-left: 40px;
  }

  .stats {
    gap: 30px;
  }

  .search-box input {
    width: 80px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
}