:root {
    --primary-color: #007bff;
    --accent-color: #ffc107;
    --dark-blue: #002147;
    --medium-dark-blue: #003366;
    --light-grey: #f8f9fa;
    --dark-text: #343a40;
    --header-offset: 120px; /* Desktop: header-top (70px) + main-nav (50px) = 120px */
}

@media (max-width: 768px) {
    :root {
        --header-offset: 120px; /* Mobile: header-top (60px) + mobile-nav-buttons (60px) = 120px */
    }
}

/* Base Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding-top: var(--header-offset); /* Ensure content is not hidden by fixed header */
    line-height: 1.6;
    color: var(--dark-text);
    overflow-x: hidden; /* Prevent horizontal scroll on body */
}

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

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* Header Styles */
.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.header-top {
    background-color: var(--dark-blue); /* Dark background for top header */
    color: #ffffff;
    padding: 15px 0; /* Vertical padding for desktop header-top */
    min-height: 70px; /* Ensure content fits */
    display: flex;
    align-items: center;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px; /* Horizontal padding for desktop container */
}

.logo {
    font-size: 1.8em;
    font-weight: bold;
    color: var(--accent-color);
    text-transform: uppercase;
    display: block; /* Ensure logo is visible */
}

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

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-align: center;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.3s ease;
    white-space: nowrap;
    color: var(--dark-text); /* Default button text color */
}

.btn-login {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-login:hover {
    background-color: #0056b3; /* Darker shade of primary */
    transform: translateY(-2px);
}

.btn-register {
    background-color: var(--accent-color);
    color: var(--dark-text);
}

.btn-register:hover {
    background-color: #e0a800; /* Darker shade of accent */
    transform: translateY(-2px);
}

.main-nav {
    background-color: var(--light-grey); /* Lighter background for main navigation */
    padding: 10px 0;
    min-height: 50px; /* Ensure content fits */
    display: flex; /* Desktop default: flex */
    align-items: center;
}

.main-nav .nav-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: flex; /* Desktop default: flex */
    flex-direction: row; /* Desktop default: row */
    justify-content: center;
    align-items: center;
    padding: 0 40px;
}

.main-nav .nav-link {
    color: var(--dark-text);
    padding: 8px 15px;
    font-weight: bold;
    transition: color 0.3s ease, background-color 0.3s ease;
    white-space: nowrap;
}

.main-nav .nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(0, 123, 255, 0.1);
    border-radius: 3px;
}

.hamburger-menu {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    position: relative;
    z-index: 1001;
}

.hamburger-menu .bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #ffffff;
    margin: 5px 0;
    transition: all 0.3s ease;
}

.mobile-nav-buttons {
    display: none; /* Hidden on desktop */
}

.mobile-menu-overlay {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 998; /* Below main-nav */
    transition: opacity 0.3s ease;
    opacity: 0;
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

/* Footer Styles */
.site-footer {
    background-color: var(--dark-blue);
    color: #ffffff;
    padding: 40px 20px;
    font-size: 0.9em;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.footer-col h3 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.1em;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    color: #ffffff;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-col ul li a:hover {
    opacity: 1;
    color: var(--accent-color);
}

.footer-logo {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--accent-color);
    text-transform: uppercase;
    display: block;
    margin-bottom: 15px;
}

.company-info p {
    opacity: 0.7;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .page-content img {
        max-width: 100% !important;
        height: auto !important;
        display: block;
    }
    .page-content {
        overflow-x: hidden;
        max-width: 100%;
    }
    body {
        overflow-x: hidden;
    }

    .header-top {
        padding: 10px 0;
        min-height: 60px;
    }

    .header-container {
        padding: 0 15px;
        width: 100%;
        max-width: none; /* Mobile: Occupy full width */
        justify-content: space-between;
    }

    .logo {
        flex: 1 !important;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        font-size: 1.5em;
        order: 2; /* Center logo */
    }

    .desktop-nav-buttons {
        display: none; /* Hide desktop buttons */
    }

    .hamburger-menu {
        display: block; /* Show hamburger menu */
        order: 1; /* Place hamburger on left */
        color: #ffffff;
    }

    .hamburger-menu.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger-menu.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger-menu.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .mobile-nav-buttons {
        display: block; /* Show mobile buttons */
        background-color: var(--dark-blue); /* Same background as header-top */
        padding: 10px 0;
        min-height: 60px; /* Ensure content fits */
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }

    .mobile-nav-buttons .nav-container {
        width: 100%;
        max-width: none; /* Mobile: Occupy full width */
        display: flex;
        justify-content: center;
        gap: 12px;
        padding: 0 15px;
    }

    .main-nav {
        display: none; /* Hidden by default */
        flex-direction: column; /* Vertical navigation */
        position: fixed;
        top: var(--header-offset); /* Start below the fixed header and mobile buttons */
        left: 0;
        width: 280px;
        height: calc(100% - var(--header-offset)); /* Adjust height */
        background-color: var(--medium-dark-blue); /* Darker background for mobile menu */
        transform: translateX(-100%); /* Slide out from left */
        transition: transform 0.3s ease, display 0.3s ease;
        padding: 20px 0;
        box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
        z-index: 9999; /* Higher than overlay */
        overflow-y: auto;
    }

    .main-nav.active {
        display: flex; /* Show menu when active */
        transform: translateX(0); /* Slide in */
    }

    .main-nav .nav-container {
        flex-direction: column;
        align-items: flex-start;
        padding: 0 20px;
        width: 100%;
        max-width: none; /* Mobile: Occupy full width */
    }

    .main-nav .nav-link {
        color: #ffffff;
        padding: 12px 0;
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .main-nav .nav-link:last-child {
        border-bottom: none;
    }

    .main-nav .nav-link:hover {
        color: var(--accent-color);
        background-color: transparent;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-col {
        text-align: center;
    }

    .footer-col ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    .footer-col ul li {
        margin-bottom: 0;
    }

    .footer-logo {
        text-align: center;
    }
}

/* Payment Methods 图标容器样式 */
.payment-icons {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 5px;
}

.payment-icons img,
.payment-icon {
  max-height: 50px;
  height: auto;
  width: auto;
  display: block;
}

/* Game Providers 图标容器样式 */
.game-providers-icons {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
}

.game-providers-icons img,
.game-provider-icon {
  max-height: 50px;
  height: auto;
  width: auto;
  display: block;
}

/* Social Media 图标容器样式 */
.social-media-icons {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
}

.social-media-icons img,
.social-media-icon {
  max-height: 50px;
  height: auto;
  width: auto;
  display: block;
}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}