/* 全局重置与基础变量 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #f8f9fc;
  --text: #1a1a2e;
  --primary: #1a1a5e;
  --accent: #ffd700;
  --accent2: #e6a800;
  --glass: rgba(255, 255, 255, 0.15);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --radius: 16px;
  --transition: 0.3s ease;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.dark-mode {
  --bg: #0a0a1a;
  --text: #e8e8f0;
  --glass: rgba(255, 255, 255, 0.05);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }

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

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--transition);
}

.dark-mode header {
  background: rgba(10, 10, 26, 0.8);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
}

.logo svg {
  width: 40px;
  height: 40px;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  padding: 8px 0;
  position: relative;
  transition: color var(--transition);
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle {
  background: none;
  border: 2px solid var(--accent);
  color: var(--accent);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.theme-toggle:hover {
  background: var(--accent);
  color: var(--primary);
}

.search-btn {
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  transition: color var(--transition);
}

.search-btn:hover {
  color: var(--accent);
}

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

.hamburger span {
  width: 28px;
  height: 3px;
  background: var(--text);
  border-radius: 3px;
  transition: all var(--transition);
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: var(--bg);
    padding: 20px;
    gap: 16px;
    transform: translateY(-120%);
    transition: transform 0.4s ease;
    box-shadow: var(--shadow);
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .hamburger {
    display: flex;
  }
}

/* Search Overlay */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.search-overlay.active {
  display: flex;
}

.search-box {
  background: var(--bg);
  padding: 30px;
  border-radius: var(--radius);
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow);
}

.search-box input {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--accent);
  border-radius: 10px;
  font-size: 1.1rem;
  background: transparent;
  color: var(--text);
  outline: none;
}

.search-box input::placeholder {
  color: #888;
}

.search-close {
  margin-top: 16px;
  background: var(--accent);
  border: none;
  padding: 10px 24px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  color: var(--primary);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #0a0a2a 0%, #1a1a5e 40%, #2a1a6e 70%, #0a0a2a 100%);
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255, 215, 0, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(255, 215, 0, 0.05) 0%, transparent 50%);
  animation: heroGlow 10s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(5%, 5%); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero h1 {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #fff;
}

.hero h1 span {
  color: var(--accent);
}

.hero p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(255, 215, 0, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 50px;
  color: #fff;
}

.hero-stats div {
  text-align: center;
}

.hero-stats .num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
}

.hero-stats .label {
  font-size: 0.9rem;
  opacity: 0.7;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
}

/* Banner Carousel */
.banner-carousel {
  position: relative;
  width: 100%;
  height: 600px;
  overflow: hidden;
  margin-top: 0;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 20px;
  text-align: center;
}

.banner-slide.active {
  opacity: 1;
}

.banner-slide h2 {
  font-size: 3rem;
  color: #fff;
  margin-bottom: 16px;
}

.banner-slide p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
}

.banner-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
}

.banner-dots span {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: background 0.3s;
}

.banner-dots span.active {
  background: var(--accent);
}

@media (max-width: 768px) {
  .banner-carousel { height: 400px; }
  .banner-slide h2 { font-size: 2rem; }
}

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

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

.section-title h2 {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-title p {
  font-size: 1.1rem;
  color: #888;
  max-width: 600px;
  margin: 0 auto;
}

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

/* About Grid */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-content h3 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.about-content p {
  margin-bottom: 16px;
  color: #666;
}

.dark-mode .about-content p {
  color: #aaa;
}

.about-image {
  background: linear-gradient(135deg, var(--primary), #2a1a6e);
  border-radius: var(--radius);
  padding: 40px;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  text-align: center;
  box-shadow: var(--shadow);
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
}

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

.culture-card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform var(--transition);
}

.culture-card:hover {
  transform: translateY(-8px);
}

.culture-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.culture-card h4 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.culture-card p {
  color: #888;
}

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

.product-card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
  text-align: center;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.product-card .icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.product-card h4 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.product-card p {
  color: #888;
  font-size: 0.95rem;
}

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

.advantage-item {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
  transition: transform var(--transition);
}

.advantage-item:hover {
  transform: translateX(6px);
}

.advantage-item h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.advantage-item p {
  color: #888;
}

/* Solutions Grid */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.solution-card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
}

.solution-card:hover {
  transform: scale(1.02);
}

.solution-card h4 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.solution-card p {
  color: #888;
}

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

.service-item {
  text-align: center;
  padding: 30px;
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}

.service-item:hover {
  transform: translateY(-6px);
}

.service-item .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.service-item h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.service-item p {
  color: #888;
}

/* Partners Grid */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 30px;
  align-items: center;
}

.partner-logo {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
}

.partner-logo:hover {
  transform: scale(1.05);
}

.partner-logo span {
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}

/* Testimonials Grid */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.testimonial-card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-6px);
}

.testimonial-card .stars {
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.testimonial-card p {
  font-style: italic;
  color: #888;
  margin-bottom: 16px;
}

.testimonial-card .author {
  font-weight: 700;
}

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

.news-card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
}

.news-card:hover {
  transform: translateY(-6px);
}

.news-card .date {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.news-card h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.news-card p {
  color: #888;
  font-size: 0.95rem;
}

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

.faq-item {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  transition: transform 0.3s;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: #888;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* HowTo Steps */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  counter-reset: step;
}

.howto-step {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  counter-increment: step;
}

.howto-step::before {
  content: counter(step);
  display: block;
  width: 50px;
  height: 50px;
  line-height: 50px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 auto 16px;
}

.howto-step h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.howto-step p {
  color: #888;
  font-size: 0.95rem;
}

/* Contact Grid */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-info h3 {
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.contact-info p {
  margin-bottom: 12px;
  color: #888;
}

.contact-info .info-item {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.contact-info .info-item .label {
  font-weight: 700;
  min-width: 80px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  margin-bottom: 16px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  background: var(--glass);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 1rem;
  transition: border var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  outline: none;
}

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

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* Footer */
footer {
  background: var(--primary);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px;
}

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

.footer-col h4 {
  color: var(--accent);
  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 {
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
}

.footer-bottom a {
  transition: color var(--transition);
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary);
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  section { padding: 60px 0; }
  .section-title h2 { font-size: 2rem; }
}

/* Dark Mode Adjustments */
.dark-mode .hero {
  background: linear-gradient(135deg, #050510 0%, #0a0a2a 40%, #1a0a3a 70%, #050510 100%);
}

.dark-mode .about-image {
  background: linear-gradient(135deg, #0a0a2a, #1a0a3a);
}

.dark-mode footer {
  background: #050510;
}

/* Glass Morphism Extras */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 4px;
}