:root {
        --primary: #c8960c;
        --primary-light: #e8bf4a;
        --bg-dark: #09080c;
        --surface: #13110a;
        --surface-sec: #1e1a0e;
        --text-main: #f5e9b0;
        --text-sec: #a8996a;
        --success: #4caf6e;
        --border: #3a2e10;
        --gradient: linear-gradient(90deg, #c8960c, #e8bf4a);

        --font-display: "Cinzel", serif;
        --font-body: "DM Sans", sans-serif;
        --font-accent: "Cinzel Decorative", serif;

        --radius-sm: 8px;
        --radius-pill: 999px;
        --transition: all 0.3s ease;
      }

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

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

      h1,
      h2,
      h3,
      h4 {
        font-family: var(--font-display);
        font-weight: 700;
      }

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

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

      ul {
        list-style: none;
      }

      /* Buttons */
      .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 12px 24px;
        border-radius: var(--radius-pill);
        font-family: var(--font-body);
        font-weight: 500;
        font-size: 16px;
        cursor: pointer;
        transition: var(--transition);
        border: none;
        text-align: center;
      }

      .btn-primary {
        background: var(--gradient);
        color: var(--bg-dark);
        font-weight: 700;
      }

      .btn-primary:hover {
        box-shadow: 0 0 15px rgba(200, 150, 12, 0.4);
        transform: translateY(-2px);
      }

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

      .btn-secondary:hover {
        background: rgba(200, 150, 12, 0.1);
        border-color: var(--primary-light);
      }

      .btn-text {
        color: var(--primary);
        font-weight: 500;
        position: relative;
        padding: 0;
        display: inline-flex;
        align-items: center;
        gap: 6px;
      }

      .btn-text::after {
        content: "→";
        transition: transform 0.2s ease;
      }

      .btn-text:hover::after {
        transform: translateX(4px);
      }

      .btn-underline {
        text-decoration: underline;
        color: var(--primary);
        text-underline-offset: 4px;
      }

      /* Typography Utilities */
      .text-gold {
        color: var(--primary);
      }
      .text-sec {
        color: var(--text-sec);
      }
      .text-center {
        text-align: center;
      }

      /* Section Styles */
      section {
        padding: 80px 5%;
      }

      @media (max-width: 767px) {
        section {
          padding: 48px 5%;
        }
      }

      .bg-dark {
        background-color: var(--bg-dark);
      }
      .bg-surface {
        background-color: var(--surface);
      }

      .section-header {
        margin-bottom: 40px;
      }

      .section-header h2 {
        font-size: 32px;
        border-left: 3px solid var(--primary);
        padding-left: 16px;
        line-height: 1.2;
      }

      .section-header.center h2 {
        border-left: none;
        padding-left: 0;
        text-align: center;
      }

      /* Navbar */
      .navbar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 24px 5%;
        z-index: 1000;
        background: transparent;
        transition: all 0.3s ease;
      }

      .navbar.scrolled {
        padding: 12px 5%; /* Header 往下滾時縮小的關鍵 */
        background: var(--bg-dark);
        border-bottom: 1px solid var(--border);
      }

      .nav-logo {
        font-family: var(--font-display);
        font-size: 24px;
        font-weight: 700;
        color: var(--primary);
      }

      .nav-menu {
        display: flex;
        align-items: center;
        flex-grow: 1;
        justify-content: space-between;
        margin-left: 40px;
      }

      .nav-links {
        display: flex;
        gap: 32px;
        align-items: center;
      }

      .nav-links a {
        font-size: 15px;
        font-weight: 500;
        transition: color 0.2s;
      }

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

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

      .menu-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        z-index: 1001;
      }

      .menu-toggle span {
        width: 25px;
        height: 2px;
        background: var(--text-main);
        transition: 0.3s;
      }

      /* Hero Section */
      .hero {
        position: relative;
        width: 100vw;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        padding-top: 80px;
        overflow: hidden;
      }

      .hero-img {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        z-index: -2;
      }

      .hero-overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(
          to top,
          var(--bg-dark) 30%,
          transparent 100%
        );
        z-index: -1;
      }

      .hero-content {
        text-align: center;
        max-width: 800px;
        padding: 0 5%;
        z-index: 1;
      }

      .hero h1 {
        font-size: 52px;
        margin-bottom: 24px;
        line-height: 1.1;
      }

      .hero p {
        font-size: 18px;
        color: var(--text-sec);
        margin-bottom: 40px;
      }

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

      /* Trust Badges */
      .grid-4 {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
      }

      .trust-badge {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
      }

      .trust-icon {
        width: 32px;
        height: 32px;
        margin-bottom: 16px;
        fill: var(--primary);
      }

      .trust-badge h3 {
        font-family: var(--font-body);
        font-size: 18px;
        margin-bottom: 8px;
      }

      .trust-badge p {
        font-size: 14px;
        color: var(--text-sec);
      }

      /* Game Categories */
      .category-banner {
        width: 100%;
        max-height: 360px;
        object-fit: cover;
        border-radius: var(--radius-sm);
        margin-bottom: 40px;
      }

      .game-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        padding: 24px;
        transition: var(--transition);
        display: flex;
        flex-direction: column;
        height: 100%;
      }

      .game-card:hover {
        border-color: var(--primary);
        transform: translateY(-4px);
      }

      .game-card h3 {
        font-size: 20px;
        margin-bottom: 12px;
      }

      .game-card p {
        font-size: 14px;
        color: var(--text-sec);
        margin-bottom: 24px;
        flex-grow: 1;
      }

      /* Bonus Section */
      .bonus-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
      }

      .bullet-list {
        margin: 24px 0;
      }

      .bullet-list li {
        position: relative;
        padding-left: 24px;
        margin-bottom: 16px;
        font-size: 16px;
        color: var(--text-main);
      }

      .bullet-list li::before {
        content: "";
        position: absolute;
        left: 0;
        top: 6px;
        width: 8px;
        height: 8px;
        background-color: var(--primary);
        transform: rotate(45deg);
      }

      .bonus-img {
        border-radius: var(--radius-sm);
        width: 100%;
      }

      /* Steps */
      .steps-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
        position: relative;
        margin-bottom: 40px;
      }

      .step-item {
        position: relative;
        padding-right: 20px;
      }

      .step-num-bg {
        font-family: var(--font-accent);
        font-size: 64px;
        color: var(--primary);
        opacity: 0.15;
        position: absolute;
        top: -20px;
        left: 0;
        line-height: 1;
        z-index: 0;
      }

      .step-content {
        position: relative;
        z-index: 1;
        padding-top: 10px;
      }

      .step-content h3 {
        font-family: var(--font-body);
        font-size: 20px;
        margin-bottom: 12px;
      }

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

      .steps-grid.desktop-divider .step-item:not(:last-child)::after {
        content: "";
        position: absolute;
        right: 0;
        top: 20%;
        height: 60%;
        width: 1px;
        background-color: var(--border);
      }

      /* Payments */
      .payment-grid {
        display: grid;
        grid-template-columns: repeat(8, 1fr);
        gap: 16px;
      }

      .payment-item {
        background: var(--surface-sec);
        border: 1px solid var(--surface-sec);
        height: 64px;
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-size: 14px;
        font-weight: 500;
        transition: var(--transition);
      }

      .payment-item:hover {
        border-color: var(--primary);
      }

      .payment-icon {
        width: 24px;
        height: 24px;
        fill: var(--text-main);
      }

      /* Testimonials */
      .testimonial-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
      }

      .testimonial-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        padding: 32px;
        transition: var(--transition);
      }

      .testimonial-card:hover {
        border-color: var(--primary);
      }

      .stars {
        color: var(--primary);
        font-size: 20px;
        margin-bottom: 16px;
      }

      .testimonial-quote {
        font-size: 15px;
        color: var(--text-sec);
        margin-bottom: 24px;
        font-style: italic;
      }

      .testimonial-author {
        display: flex;
        align-items: center;
        gap: 16px;
      }

      .initials {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-family: var(--font-display);
        font-weight: 700;
        color: var(--text-main);
      }

      .author-info h4 {
        font-family: var(--font-body);
        font-size: 16px;
        margin-bottom: 2px;
      }

      .author-info p {
        font-size: 12px;
        color: var(--text-sec);
      }

      /* About Brief */
      .about-brief {
        max-width: 760px;
        margin: 0 auto;
        text-align: center;
      }

      .about-brief p {
        font-size: 16px;
        line-height: 1.8;
        margin-bottom: 24px;
      }

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

      .faq-item {
        border-bottom: 1px solid var(--border);
      }

      .faq-question {
        width: 100%;
        background: none;
        border: none;
        padding: 24px 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        color: var(--text-main);
        font-family: var(--font-display);
        font-size: 18px;
        text-align: left;
      }

      .faq-icon {
        position: relative;
        width: 20px;
        height: 20px;
      }

      .faq-icon::before,
      .faq-icon::after {
        content: "";
        position: absolute;
        background: var(--primary);
        transition: var(--transition);
      }

      .faq-icon::before {
        top: 9px;
        left: 0;
        width: 20px;
        height: 2px;
      }

      .faq-icon::after {
        top: 0;
        left: 9px;
        width: 2px;
        height: 20px;
      }

      .faq-item.active .faq-icon::after {
        transform: rotate(90deg);
        opacity: 0;
      }

      .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        color: var(--text-sec);
        font-size: 15px;
        line-height: 1.7;
      }

      .faq-answer-inner {
        padding-bottom: 24px;
        border-top: 1px solid var(--border);
        padding-top: 16px;
        margin-top: -8px;
      }

      /* Footer */
      footer {
        background: var(--surface);
        padding: 60px 5% 24px;
        border-top: 1px solid var(--border);
      }

      .footer-grid {
        display: grid;
        grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
        gap: 40px;
        margin-bottom: 40px;
      }

      .footer-col h4 {
        font-family: var(--font-display);
        font-size: 18px;
        margin-bottom: 20px;
        color: var(--primary);
      }

      .footer-col p {
        font-size: 14px;
        color: var(--text-sec);
        margin-bottom: 16px;
      }

      .footer-links {
        display: flex;
        flex-direction: column;
        gap: 12px;
      }

      .footer-links a {
        font-size: 14px;
        color: var(--text-sec);
        transition: color 0.2s;
      }

      .footer-links a:hover {
        color: var(--primary);
      }

      .footer-bottom {
        border-top: 1px solid var(--border);
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 12px;
        color: var(--text-sec);
      }

      .license-badge {
        display: inline-block;
        padding: 6px 16px;
        background: var(--border);
        border: 1px solid var(--primary);
        color: var(--primary-light);
        border-radius: var(--radius-pill);
        font-size: 13px;
        font-weight: 500;
        margin-bottom: 24px;
      }

      /* Floating CTA */
      .floating-cta {
        position: fixed;
        bottom: 24px;
        right: 24px;
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
      }

      .floating-cta.visible {
        opacity: 1;
        pointer-events: auto;
      }

      /* Responsive */
      @media (max-width: 1023px) {
        .grid-4 {
          grid-template-columns: repeat(2, 1fr);
        }
        .payment-grid {
          grid-template-columns: repeat(4, 1fr);
        }
        .steps-grid {
          grid-template-columns: repeat(2, 1fr);
        }
        .steps-grid.desktop-divider .step-item::after {
          display: none;
        }
        .testimonial-grid {
          grid-template-columns: repeat(2, 1fr);
        }
        .testimonial-grid .testimonial-card:nth-child(3) {
          grid-column: span 2;
          max-width: 50%;
          margin: auto;
        }
        .footer-grid {
          grid-template-columns: repeat(2, 1fr);
        }
      }

      @media (max-width: 767px) {
        .menu-toggle {
          display: flex;
        }

        .nav-menu {
          display: none;
          position: absolute;
          top: 100%;
          left: 0;
          width: 100%;
          margin-left: 0;
          background: var(--surface);
          flex-direction: column;
          padding: 24px 5%;
          border-bottom: 1px solid var(--border);
          box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
        }

        .navbar.menu-open .nav-menu {
          display: flex;
        }

        .nav-links {
          flex-direction: column;
          width: 100%;
          text-align: center;
          gap: 20px;
          margin-bottom: 24px;
        }

        .nav-actions {
          flex-direction: column;
          width: 100%;
          gap: 16px;
        }

        .nav-actions .btn {
          width: 100%;
        }

        .menu-toggle.active span:nth-child(1) {
          transform: translateY(7px) rotate(45deg);
        }
        .menu-toggle.active span:nth-child(2) {
          opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
          transform: translateY(-7px) rotate(-45deg);
        }

        .hero h1 {
          font-size: 32px;
        }
        .hero-actions {
          flex-direction: column;
        }

        .game-card {
          margin-bottom: 16px;
        }
        .grid-4,
        .bonus-grid,
        .steps-grid,
        .testimonial-grid {
          grid-template-columns: 1fr;
        }

        /* 將原本 4 欄的付款方式，修正為 2 欄防止破版 */
        .payment-grid {
          grid-template-columns: repeat(2, 1fr);
          gap: 12px;
        }

        .bonus-grid {
          gap: 32px;
        }
        .bonus-grid > div:first-child {
          order: 2;
        }
        .bonus-grid > div:last-child {
          order: 1;
        }

        .testimonial-grid .testimonial-card:nth-child(3) {
          grid-column: span 1;
          max-width: 100%;
        }
        .footer-grid {
          grid-template-columns: 1fr;
        }
        .footer-bottom {
          flex-direction: column;
          gap: 16px;
          text-align: center;
        }

        .floating-cta .btn {
          width: 50px;
          height: 50px;
          padding: 0;
          border-radius: 50%;
          font-size: 0;
        }
        .floating-cta .btn::after {
          content: "↑";
          font-size: 20px;
          color: var(--bg-dark);
        }
      }