/* ===== 全局重置与变量 ===== */
:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #ffd700;
  --accent2: #e94560;
  --bg: #f0f2f5;
  --card: #ffffff;
  --text: #1a1a2e;
  --text2: #555;
  --shadow: 0 8px 32px rgba(0,0,0,0.1);
  --radius: 16px;
  --glass: rgba(255,255,255,0.7);
  --glass-border: rgba(255,255,255,0.3);
  --transition: 0.3s ease;
  --font: 'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
}
[data-theme="dark"] {
  --primary: #0f0f23;
  --secondary: #1a1a2e;
  --bg: #0a0a1a;
  --card: #1a1a2e;
  --text: #e0e0e0;
  --text2: #aaa;
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
  --glass: rgba(26,26,46,0.8);
  --glass-border: rgba(255,255,255,0.1);
}
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--accent2);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.glass {
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 15px rgba(233,69,96,0.3);
}
.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(233,69,96,0.4);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  box-shadow: none;
}
.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}
.section {
  padding: 80px 0;
}
.section-title {
  text-align: center;
  margin-bottom: 60px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}
.section-title h2 {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-title p {
  color: var(--text2);
  font-size: 1.1rem;
  margin-top: 10px;
}
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid transparent;
  transform: translateY(30px);
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
}
.grid {
  display: grid;
  gap: 30px;
}
.flex {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.text-center {
  text-align: center;
}
.mt-20 {
  margin-top: 20px;
}
.mb-20 {
  margin-bottom: 20px;
}

/* ===== 滚动动画 ===== */
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ===== Header ===== */
#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 var(--glass-border);
  transition: background var(--transition);
}
#header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
#header .logo {
  font-size: 1.6rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}
#main-nav {
  display: flex;
  align-items: center;
  gap: 25px;
}
#main-nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}
#main-nav a:hover {
  color: var(--accent);
}
#themeToggle {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  padding: 5px;
  color: var(--text);
  transition: color var(--transition);
}
#mobileMenuBtn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
}

/* ===== Hero ===== */
#hero {
  padding-top: 70px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary), var(--secondary), #0f3460);
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 30% 50%, rgba(255,215,0,0.08), transparent 60%),
              radial-gradient(circle at 70% 50%, rgba(233,69,96,0.08), transparent 60%);
  pointer-events: none;
}
#hero .container {
  position: relative;
  z-index: 2;
  width: 100%;
}
#heroCarousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  min-height: 500px;
  display: flex;
  align-items: center;
}
.carousel-slide {
  min-width: 100%;
  padding: 60px 40px;
  text-align: center;
  transition: opacity 0.8s ease;
}
.carousel-slide h1 {
  font-size: 3.5rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 20px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
  animation: fadeInUp 1s ease;
}
.carousel-slide p {
  font-size: 1.3rem;
  color: rgba(255,255,255,0.85);
  max-width: 700px;
  margin: 0 auto 30px;
  animation: fadeInUp 1.2s ease;
}
.carousel-slide .btn-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1.4s ease;
}
.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.5);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.carousel-dot.active {
  background: var(--accent);
  border-color: var(--accent);
}

/* ===== About ===== */
#about .grid {
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
#about .about-text p {
  font-size: 1.1rem;
  margin-bottom: 20px;
  animation: slideInLeft 0.8s ease;
}
#about .stats-box {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: var(--radius);
  padding: 40px;
  color: #fff;
  text-align: center;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  animation: slideInRight 0.8s ease;
}
#about .stats-box .stat-number {
  font-size: 4rem;
  font-weight: 900;
  margin-bottom: 10px;
  animation: pulse 2s infinite;
}
#about .stats-box p {
  font-size: 1.2rem;
}

/* ===== Brand Story ===== */
.brand-story {
  background: var(--card);
}
.brand-story .story-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.brand-story .story-content p {
  font-size: 1.1rem;
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s ease forwards;
}

/* ===== Products ===== */
#products .grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
#products .card {
  text-align: center;
}
#products .card .icon {
  font-size: 3rem;
  margin-bottom: 15px;
  transition: transform var(--transition);
}
#products .card:hover .icon {
  transform: scale(1.2) rotate(10deg);
}
#products .card h3 {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

/* ===== Advantages ===== */
#advantages .grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}
#advantages .card {
  text-align: center;
}
#advantages .card .icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  transition: transform var(--transition);
}
#advantages .card:hover .icon {
  transform: scale(1.3);
}
#advantages .card h3 {
  margin-bottom: 10px;
}

/* ===== Data Stats ===== */
.data-stats {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
}
.data-stats .section-title h2 {
  color: #fff;
  -webkit-text-fill-color: #fff;
}
.data-stats .section-title p {
  color: rgba(255,255,255,0.8);
}
.data-stats .grid {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  text-align: center;
}
.data-stats .counter {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
  animation: pulse 3s infinite;
}
.data-stats .stat-label {
  font-size: 1.1rem;
  margin-top: 5px;
}

/* ===== Cases ===== */
#cases .grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
#cases .card .case-header {
  background: var(--bg);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 15px;
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  transition: background var(--transition);
}
#cases .card:hover .case-header {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
}

/* ===== Partners ===== */
.partners .partner-item {
  background: var(--bg);
  padding: 20px 30px;
  border-radius: 12px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text2);
  transition: all var(--transition);
}
.partners .partner-item:hover {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  transform: scale(1.05);
}

/* ===== Testimonials ===== */
.testimonials .grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.testimonials .stars {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
  color: var(--accent);
}

/* ===== News ===== */
#news .grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
#news article .news-image {
  background: var(--bg);
  border-radius: 12px;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 15px;
  font-size: 3rem;
  transition: transform var(--transition);
}
#news article:hover .news-image {
  transform: scale(1.05);
}
#news article time {
  color: var(--text2);
  font-size: 0.9rem;
}
#news article h3 {
  font-size: 1.2rem;
  margin: 8px 0;
}

/* ===== FAQ ===== */
#faq .faq-item {
  margin-bottom: 15px;
  cursor: pointer;
  transition: all var(--transition);
}
#faq .faq-item:hover {
  border-color: var(--accent);
}
#faq .faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1.1rem;
}
#faq .faq-icon {
  transition: transform var(--transition);
}
#faq .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  color: var(--text2);
}

/* ===== HowTo ===== */
.howto .grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  text-align: center;
}
.howto .step-number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 900;
  margin: 0 auto 20px;
  transition: transform var(--transition);
}
.howto .card:hover .step-number {
  transform: rotate(360deg) scale(1.1);
}

/* ===== Contact ===== */
#contact .grid {
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
#contact .info-item {
  margin-bottom: 20px;
}
#contact .info-item h3 {
  margin-bottom: 10px;
}
#contact .contact-form input,
#contact .contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--glass-border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border var(--transition);
}
#contact .contact-form input:focus,
#contact .contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255,215,0,0.1);
}

/* ===== Sitemap ===== */
.sitemap .grid {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  text-align: center;
}

/* ===== Footer ===== */
footer {
  background: var(--primary);
  color: rgba(255,255,255,0.8);
  padding: 40px 0 20px;
}
footer .grid {
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
}
footer h3 {
  color: #fff;
  font-size: 1.4rem;
  margin-bottom: 15px;
}
footer h4 {
  color: #fff;
  margin-bottom: 15px;
}
footer a {
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}
footer a:hover {
  color: var(--accent);
}
footer .footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 30px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
}

/* ===== Back to Top ===== */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: all var(--transition);
}
#backToTop:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.4);
}

/* ===== Search Modal ===== */
#searchModal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}
#searchModal .search-box {
  width: 90%;
  max-width: 500px;
  padding: 30px;
}
#searchModal .search-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
#searchModal #closeSearch {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
}
#searchModal #searchInput {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--glass-border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border var(--transition);
}
#searchModal #searchInput:focus {
  border-color: var(--accent);
}
#searchResults {
  margin-top: 15px;
  max-height: 300px;
  overflow-y: auto;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  #about .grid {
    grid-template-columns: 1fr;
  }
  #contact .grid {
    grid-template-columns: 1fr;
  }
  footer .grid {
    grid-template-columns: 1fr 1fr;
  }
  .howto .grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .section {
    padding: 50px 0;
  }
  .section-title h2 {
    font-size: 1.8rem;
  }
  .container {
    padding: 0 15px;
  }
  #header .container {
    height: 60px;
  }
  #main-nav {
    gap: 15px;
  }
  #mobileMenuBtn {
    display: block;
  }
  #main-nav a:not(#themeToggle):not(#mobileMenuBtn) {
    display: none;
  }
  #main-nav.open {
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    background: var(--card);
    padding: 20px;
    box-shadow: var(--shadow);
    border-radius: 0 0 var(--radius) var(--radius);
  }
  #main-nav.open a {
    display: block;
    padding: 10px 0;
  }
  .carousel-slide h1 {
    font-size: 2.2rem;
  }
  .carousel-slide p {
    font-size: 1rem;
  }
  #heroCarousel {
    min-height: 400px;
  }
  .howto .grid {
    grid-template-columns: 1fr;
  }
  footer .grid {
    grid-template-columns: 1fr;
  }
  #backToTop {
    width: 45px;
    height: 45px;
    font-size: 1.2rem;
    bottom: 20px;
    right: 20px;
  }
}
@media (max-width: 480px) {
  .carousel-slide {
    padding: 40px 20px;
  }
  .carousel-slide h1 {
    font-size: 1.8rem;
  }
  .carousel-slide .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
  }
  #about .stats-box .stat-number {
    font-size: 3rem;
  }
}