/* roulang page: index */
:root {
      --deep-green: #0A1F1A;
      --ivory: #F5F0E8;
      --gold: #C9A96E;
      --gold-hover: #D4B87A;
      --warm-gray: #D9D0C1;
      --charcoal: #1E1E1E;
      --success-green: #2E7D5B;
      --card-bg: #FFFFFF;
      --shadow-light: 0 4px 20px rgba(10, 31, 26, 0.06);
      --shadow-medium: 0 8px 32px rgba(10, 31, 26, 0.12);
      --radius-lg: 16px;
      --radius-pill: 40px;
      --radius-md: 8px;
      --transition-smooth: 0.3s ease;
      --container-max: 1280px;
      --gap-col: 24px;
      --gap-row: 48px;
    }

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

    body {
      font-family: 'Noto Sans SC', sans-serif;
      background-color: var(--ivory);
      color: var(--charcoal);
      line-height: 1.7;
      font-size: 16px;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    h1, h2, h3 {
      font-weight: 700;
      font-family: 'Noto Sans SC', sans-serif;
    }

    h1 {
      font-size: 56px;
      line-height: 1.1;
      letter-spacing: -0.02em;
    }
    h2 {
      font-size: 40px;
      line-height: 1.2;
      margin-bottom: 24px;
    }
    h3 {
      font-size: 22px;
      line-height: 1.3;
    }

    p, li {
      max-width: 68ch;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-smooth);
    }

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

    button, .btn {
      cursor: pointer;
      border: none;
      font-family: inherit;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all var(--transition-smooth);
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--gold);
      color: var(--deep-green);
      border-radius: var(--radius-pill);
      padding: 14px 32px;
      font-size: 16px;
      box-shadow: 0 4px 12px rgba(201, 169, 110, 0.25);
      position: relative;
      overflow: hidden;
    }
    .btn-primary:hover {
      background-color: var(--gold-hover);
      transform: scale(1.03);
      box-shadow: 0 8px 20px rgba(201, 169, 110, 0.4);
    }
    .btn-primary::after {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
      transition: left 0.8s;
    }
    .btn-primary:hover::after {
      left: 100%;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--ivory);
      color: var(--ivory);
      border-radius: var(--radius-pill);
      padding: 12px 32px;
      font-size: 16px;
    }
    .btn-outline:hover {
      border-color: var(--gold);
      color: var(--gold);
    }

    .section {
      padding: 100px 0;
    }
    .section-dark {
      background-color: var(--deep-green);
      color: var(--ivory);
    }
    .section-light-offset {
      background-color: #EDE8DF;
    }

    /* Floating Dock Navigation */
    .nav-dock {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: 90%;
      max-width: 720px;
      background: rgba(10, 31, 26, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: 48px;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 1000;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
      transition: background 0.4s, box-shadow 0.3s;
    }
    .nav-dock.scrolled {
      background: rgba(10, 31, 26, 0.92);
      box-shadow: 0 12px 40px rgba(0,0,0,0.5);
    }
    .logo {
      font-size: 20px;
      font-weight: 700;
      color: var(--gold);
      letter-spacing: 1px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      color: var(--ivory);
      font-size: 14px;
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--gold);
    }
    @media (max-width: 768px) {
      .nav-dock {
        top: auto;
        bottom: 0;
        left: 0;
        transform: none;
        width: 100%;
        max-width: 100%;
        border-radius: 24px 24px 0 0;
        padding: 12px 20px;
        justify-content: space-around;
        background: rgba(10, 31, 26, 0.95);
      }
      .nav-links {
        gap: 12px;
      }
      .nav-links a {
        font-size: 0;
      }
      .nav-links a i {
        font-size: 20px;
        color: var(--ivory);
      }
      .nav-links a:hover i {
        color: var(--gold);
      }
      .btn-primary.nav-cta {
        padding: 8px 16px;
        font-size: 13px;
      }
    }

    /* Hero */
    .hero {
      display: flex;
      align-items: center;
      min-height: 90vh;
      background-color: var(--deep-green);
      color: var(--ivory);
      padding-top: 120px;
      padding-bottom: 60px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .hero-left h1 {
      margin-bottom: 24px;
      color: var(--ivory);
    }
    .hero-left .subtitle {
      font-size: 18px;
      color: var(--warm-gray);
      margin-bottom: 16px;
    }
    .hero-left .desc {
      font-size: 16px;
      color: var(--warm-gray);
      margin-bottom: 40px;
      max-width: 40ch;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-right {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: linear-gradient(135deg, rgba(10,31,26,0.8), rgba(10,31,26,0.3));
      box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    }
    .hero-right img {
      width: 100%;
      height: auto;
      display: block;
      opacity: 0.9;
    }
    .chip-animation {
      position: absolute;
      top: 20%;
      right: 10%;
      width: 80px;
      height: 80px;
      background: radial-gradient(circle at 30% 30%, var(--gold), #8a6d34);
      border-radius: 50%;
      box-shadow: 0 10px 25px rgba(0,0,0,0.6);
      animation: floatChip 4s ease-in-out infinite;
    }
    @keyframes floatChip {
      0% { transform: translateY(0px) rotate(0deg); }
      50% { transform: translateY(-15px) rotate(8deg); }
      100% { transform: translateY(0px) rotate(0deg); }
    }

    /* Features Grid */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--gap-col);
    }
    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 40px 24px;
      box-shadow: var(--shadow-light);
      transition: all 0.3s ease;
      text-align: center;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-medium);
      transform: translateY(-4px);
    }
    .feature-icon {
      font-size: 40px;
      color: var(--gold);
      margin-bottom: 20px;
      transition: transform 0.3s;
    }
    .feature-card:hover .feature-icon {
      transform: rotate(5deg);
    }

    /* Showcase Waterfall */
    .showcase-waterfall {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
    }
    .showcase-item {
      border-radius: var(--radius-lg);
      overflow: hidden;
      position: relative;
      box-shadow: var(--shadow-light);
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .showcase-item:hover {
      transform: scale(1.03);
      box-shadow: var(--shadow-medium);
    }
    .showcase-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .showcase-label {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      background: linear-gradient(transparent, rgba(0,0,0,0.8));
      color: white;
      padding: 20px;
      font-weight: 700;
      font-size: 18px;
    }
    .showcase-item:nth-child(odd) {
      flex: 1 1 58%;
      min-width: 300px;
      height: 360px;
    }
    .showcase-item:nth-child(even) {
      flex: 1 1 38%;
      min-width: 250px;
      height: 360px;
    }

    /* Comparison */
    .comparison-table {
      display: grid;
      grid-template-columns: 1fr 1px 1fr;
      gap: 32px;
      align-items: start;
    }
    .vs-divider {
      width: 1px;
      background: var(--warm-gray);
      height: 100%;
    }
    .comp-card {
      padding: 32px;
      border-radius: var(--radius-lg);
    }
    .comp-left {
      background: #E0DBD2;
      color: var(--charcoal);
    }
    .comp-right {
      background: var(--deep-green);
      color: var(--ivory);
      border: 1px solid var(--gold);
    }
    .comp-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 16px;
    }
    .comp-item i {
      font-size: 18px;
    }
    .comp-left i {
      color: #8a8a8a;
    }
    .comp-right i {
      color: var(--gold);
    }

    /* FAQ */
    .faq-accordion {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--warm-gray);
      margin-bottom: 12px;
    }
    .faq-question {
      background: var(--card-bg);
      padding: 24px;
      border-radius: var(--radius-md);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #f9f6f0;
    }
    .faq-icon {
      font-size: 24px;
      transition: transform 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      background: #f0ece4;
      border-radius: 0 0 8px 8px;
    }
    .faq-answer p {
      padding: 0 24px;
      margin: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 20px 0;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* CTA Form */
    .cta-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 60px;
      max-width: 700px;
      margin: 0 auto;
      box-shadow: var(--shadow-medium);
    }
    .form-group {
      margin-bottom: 24px;
    }
    .form-group input, .form-group textarea {
      width: 100%;
      padding: 14px 18px;
      border: 1px solid var(--warm-gray);
      border-radius: var(--radius-md);
      font-size: 16px;
      font-family: inherit;
      background: white;
      transition: border 0.2s;
    }
    .form-group input:focus, .form-group textarea:focus {
      outline: none;
      border-color: var(--gold);
    }

    /* Footer */
    .footer {
      background: var(--deep-green);
      color: var(--ivory);
      padding: 40px 0;
      border-top: 1px solid var(--gold);
    }
    .footer-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .social-icons i {
      font-size: 20px;
      margin-left: 16px;
      color: var(--warm-gray);
      transition: color 0.2s;
    }
    .social-icons i:hover {
      color: var(--gold);
    }

    /* Animations */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .fade-in-up {
      animation: fadeInUp 0.6s ease-out both;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .comparison-table {
        grid-template-columns: 1fr;
      }
      .vs-divider {
        display: none;
      }
    }
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      h3 { font-size: 20px; }
      .section { padding: 60px 0; }
      .features-grid {
        grid-template-columns: 1fr;
      }
      .showcase-item:nth-child(odd),
      .showcase-item:nth-child(even) {
        flex: 1 1 100%;
        height: 280px;
      }
      .cta-card {
        padding: 30px 20px;
      }
    }