:root {
    --bg-dark: #0a0b10;
    --bg-card: #14161f;
    --primary: #ff2a6d;
    --secondary: #05d9e8;
    --purple: #d300c5;
    --text-main: #f0f0f5;
    --text-muted: #8b8e9e;
    --border-glow: rgba(5, 217, 232, 0.3);
    --font-main: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
      radial-gradient(circle at 15% 50%, rgba(255, 42, 109, 0.08), transparent 25%),
      radial-gradient(circle at 85% 30%, rgba(5, 217, 232, 0.08), transparent 25%);
  }

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

  ul {
    list-style: none;
  }

  /* Header & Nav */
  .site-header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 11, 16, 0.85);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
  }

  .logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .logo-area img {
    height: 32px;
    border-radius: 6px;
    box-shadow: 0 0 10px var(--primary);
  }

  .logo-text {
    font-size: 1.2rem;
    font-weight: bold;
    letter-spacing: 1px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .nav-links {
    display: flex;
    gap: 24px;
    font-size: 0.95rem;
  }

  .nav-links a:hover {
    color: var(--secondary);
    text-shadow: 0 0 8px var(--secondary);
  }

  .nav-downloads {
    display: flex;
    gap: 12px;
  }

  .btn-nav {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    transition: all 0.3s ease;
  }

  .btn-android {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
  }

  .btn-android:hover {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 0 15px var(--primary);
  }

  .btn-ios {
    background: linear-gradient(90deg, var(--primary), var(--purple));
    color: #fff;
    border: none;
  }

  .btn-ios:hover {
    box-shadow: 0 0 15px var(--purple);
  }

  /* Hero Section */
  .hero-section {
    padding: 140px 20px 80px;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .hero-title {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(5, 217, 232, 0.4);
  }
  
  .hero-title span {
    color: var(--secondary);
  }

  .hero-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin-bottom: 30px;
  }

  .hero-actions {
    display: flex;
    gap: 20px;
  }

  .btn-main {
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: bold;
    background: var(--primary);
    color: #fff;
    border: 2px solid transparent;
    box-shadow: 0 0 20px rgba(255, 42, 109, 0.5);
    transition: all 0.3s;
  }

  .btn-main:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(255, 42, 109, 0.8);
    background: #ff4b85;
  }

  /* Section Common */
  .section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
  }

  .section-title {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
  }

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

  /* Masonry Grid */
  .masonry-grid {
    column-count: 3;
    column-gap: 20px;
  }

  .grid-item {
    break-inside: avoid;
    margin-bottom: 20px;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-glow);
    box-shadow: 0 0 15px rgba(0,0,0,0.5);
    transition: transform 0.3s;
  }

  .grid-item:hover {
    transform: scale(1.02);
    box-shadow: 0 0 25px var(--secondary);
    z-index: 2;
  }

  .grid-item img {
    width: 100%;
    height: auto;
    display: block;
  }

  .item-label {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(transparent, rgba(0,0,0,0.9));
    padding: 30px 15px 15px;
    font-weight: bold;
    font-size: 1.1rem;
  }

  /* 3D Carousel */
  .carousel-section {
    text-align: center;
    perspective: 1200px;
    padding: 80px 20px;
  }

  .carousel-container {
    width: 100%;
    max-width: 800px;
    height: 450px;
    margin: 0 auto;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s ease;
  }

  .carousel-card {
    position: absolute;
    width: 220px;
    height: 320px;
    left: 50%;
    top: 50%;
    margin-left: -110px;
    margin-top: -160px;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid var(--secondary);
    box-shadow: 0 0 15px var(--border-glow);
    transition: all 0.8s ease;
    cursor: pointer;
  }

  .carousel-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  /* Running Comments */
  .marquee-wrapper {
    overflow: hidden;
    white-space: nowrap;
    background: rgba(255,255,255,0.03);
    padding: 15px 0;
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    margin: 40px 0;
  }

  .marquee-content {
    display: inline-block;
    animation: marquee 20s linear infinite;
  }

  .comment-item {
    display: inline-block;
    margin-right: 40px;
    color: var(--text-muted);
    font-size: 0.95rem;
  }

  .comment-item span {
    color: var(--secondary);
    font-weight: bold;
    margin-right: 8px;
  }

  @keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
  }

  /* Feature List & FAQ */
  .layout-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
  }

  .faq-item {
    background: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
  }

  .faq-question {
    padding: 20px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    background: rgba(255,255,255,0.02);
  }

  .faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--text-muted);
  }

  .faq-item.active .faq-answer {
    padding: 20px;
    max-height: 200px;
  }

  /* Footer */
  .site-footer {
    border-top: 1px solid rgba(255,255,255,0.05);
    background: #05060a;
    padding: 40px 20px 20px;
    margin-top: 60px;
  }

  .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
  }

  .related-searches {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 2;
  }

  .related-searches a {
    margin-right: 15px;
    color: #666;
  }

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #555;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 20px;
  }

  /* Responsive */
  @media (max-width: 1024px) {
    .hero-title { font-size: 2.5rem; }
    .masonry-grid { column-count: 2; }
    .layout-split { grid-template-columns: 1fr; }
  }

  @media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-title { font-size: 2rem; }
    .masonry-grid { column-count: 1; }
    .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
    .hero-actions { flex-direction: column; width: 100%; max-width: 300px; }
    .carousel-container { height: 350px; transform: scale(0.8) !important; }
    .carousel-card { width: 160px; height: 240px; margin-left: -80px; margin-top: -120px; }
  }