:root {
    --bg-dark: #121212;
    --bg-card: #1e1e1e;
    --text-main: #f5f5f5;
    --text-sub: #a0a0a0;
    --brand-color: #ff4d4f;
    --brand-hover: #ff7875;
    --radius: 12px;
  }

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

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

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

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  /* Header */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(18, 18, 18, 0.9);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }

  .logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: bold;
    color: #fff;
  }

  .logo-wrap img {
    height: 32px;
    width: auto;
    border-radius: 6px;
  }

  .download-btn {
    background-color: var(--brand-color);
    color: #fff;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.3s;
  }

  .download-btn:hover {
    background-color: var(--brand-hover);
  }

  /* Hero */
  .hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #000;
  }

  .hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    z-index: 1;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 20px;
    max-width: 800px;
  }

  .hero-content h1 {
    font-size: 32px;
    line-height: 1.3;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.8);
  }

  .hero-content p {
    font-size: 16px;
    color: #ddd;
    margin-bottom: 30px;
    text-shadow: 0 1px 5px rgba(0,0,0,0.8);
  }

  .hero-btn {
    display: inline-block;
    background-color: var(--brand-color);
    color: #fff;
    padding: 14px 36px;
    font-size: 18px;
    border-radius: 30px;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(255, 77, 79, 0.4);
    transition: transform 0.2s, background 0.3s;
  }

  .hero-btn:hover {
    transform: translateY(-2px);
    background-color: var(--brand-hover);
  }

  /* Section Common */
  section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 12px;
    text-align: center;
  }

  .section-subtitle {
    text-align: center;
    color: var(--text-sub);
    margin-bottom: 40px;
    font-size: 15px;
  }

  /* Feature Grid */
  .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card {
    background-color: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    transition: transform 0.3s;
  }

  .feature-card:hover {
    transform: translateY(-5px);
  }

  .feature-card h3 {
    color: var(--brand-color);
    font-size: 18px;
    margin-bottom: 10px;
  }

  .feature-card p {
    color: var(--text-sub);
    font-size: 14px;
  }

  /* Dual Image Layout */
  .split-section {
    background-color: #0a0a0a;
  }

  .split-inner {
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
  }

  .split-text h2 {
    font-size: 22px;
    margin-bottom: 16px;
  }

  .split-text p {
    color: var(--text-sub);
    margin-bottom: 12px;
    font-size: 15px;
  }

  .split-image {
    width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  }

  .split-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
  }

  /* Poster Wall */
  .poster-wall {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }

  .poster-item {
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    aspect-ratio: 3/4;
  }

  .poster-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
  }

  .poster-item:hover img {
    transform: scale(1.05);
  }

  .poster-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  }

  /* Steps */
  .steps-section {
    background-color: var(--bg-dark);
  }

  .steps-wrap {
    display: flex;
    flex-direction: column;
    gap: 30px;
  }

  .step-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
  }

  .step-num {
    background: var(--brand-color);
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
  }

  .step-content h3 {
    font-size: 16px;
    margin-bottom: 6px;
    color: var(--text-main);
  }

  .step-content p {
    font-size: 14px;
    color: var(--text-sub);
  }

  /* Big Image Section */
  .showcase-section {
    text-align: center;
    background: linear-gradient(180deg, var(--bg-dark) 0%, #050505 100%);
  }
  
  .showcase-img {
    max-width: 600px;
    margin: 0 auto 30px;
    border-radius: var(--radius);
    box-shadow: 0 20px 40px rgba(0,0,0,0.6);
  }

  /* FAQ */
  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 800px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 20px;
  }

  .faq-item h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #fff;
  }

  .faq-item p {
    font-size: 14px;
    color: var(--text-sub);
  }

  /* Footer */
  .site-footer {
    background: #000;
    padding: 40px 20px;
    text-align: center;
    font-size: 12px;
    color: #666;
    border-top: 1px solid #222;
  }

  .site-footer p {
    margin-bottom: 10px;
  }

  .site-footer a {
    color: #888;
    transition: color 0.3s;
  }

  .site-footer a:hover {
    color: #ccc;
  }

  /* Responsive */
  @media (min-width: 768px) {
    .hero-content h1 { font-size: 42px; }
    .hero-content p { font-size: 18px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .split-inner { flex-direction: row; gap: 50px; }
    .split-text, .split-image { flex: 1; }
    .poster-wall { grid-template-columns: repeat(3, 1fr); }
    .steps-wrap { flex-direction: row; }
    .step-item { flex: 1; flex-direction: column; gap: 15px; }
  }

  @media (min-width: 1024px) {
    .hero-content h1 { font-size: 52px; }
    .feature-grid { grid-template-columns: repeat(4, 1fr); }
    .poster-wall { grid-template-columns: repeat(5, 1fr); }
    .section-title { font-size: 32px; }
  }