/* Basic Reset & Typography */
:root {
    --primary-color: #e44d26; /* A common vibrant color for betting sites */
    --secondary-color: #333;
    --accent-color: #f7b731;
    --text-color: #f0f0f0;
    --bg-color-dark: #1a1a1a;
    --bg-color-light: #2c2c2c;
    --border-color: #444;
    --font-family: 'Arial', sans-serif;
}

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

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-color);
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
.main-header {
    background-color: var(--bg-color-light);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.logo img {
    height: 40px;
    vertical-align: middle;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn {
    padding: 8px 15px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s ease;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: #c43e1d;
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.language-selector select {
    background-color: var(--bg-color-dark);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 7px 10px;
    border-radius: 5px;
    cursor: pointer;
    -webkit-appearance: none; /* Remove default arrow on WebKit */
    -moz-appearance: none;    /* Remove default arrow on Firefox */
    appearance: none;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23f0f0f0%22%20d%3D%22M287%2C114.3L159.2%2C242.1c-4.7%2C4.7-12.3%2C4.7-17%2C0L5.4%2C114.3c-4.7-4.7-4.7-12.3%2C0-17l19.8-19.8c4.7-4.7%2C12.3-4.7%2C17%2C0l118.8%2C118.7l118.8-118.7c4.7-4.7%2C12.3-4.7%2C17%2C0l19.8%2C19.8C291.7%2C102%2C291.7%2C109.6%2C287%2C114.3z%22%2F%3E%3C%2Fsvg%3E'); /* Custom arrow */
    background-repeat: no-repeat;
    background-position: right 8px top 50%;
    background-size: 12px auto;
    padding-right: 25px; /* Make space for the arrow */
}

.mobile-menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 101;
}

.mobile-menu-toggle .icon-bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: all 0.3s ease;
}

.main-nav {
    background-color: var(--bg-color-dark);
    border-radius: 5px;
}

.nav-menu {
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 10px 15px;
    color: var(--text-color);
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease;
    white-space: nowrap;
}

.nav-link:hover, .nav-item.active .nav-link {
    background-color: var(--primary-color);
    border-radius: 3px;
    color: #fff;
}

.submenu {
    display: none;
    position: absolute;
    background-color: var(--bg-color-dark);
    min-width: 180px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    z-index: 100;
    border-radius: 5px;
    padding: 10px 0;
    top: 100%; /* Position below the parent */
    left: 0;
    border: 1px solid var(--border-color);
}

.nav-item.has-submenu:hover .submenu {
    display: block;
}

.submenu li a {
    color: var(--text-color);
    padding: 10px 15px;
    display: block;
    white-space: nowrap;
}

.submenu li a:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* Footer Styles */
.main-footer {
    background-color: var(--bg-color-light);
    padding: 40px 0 20px;
    border-top: 1px solid var(--border-color);
    color: #ccc;
    font-size: 0.9em;
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-col h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.2em;
}

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

.footer-col ul {
    list-style: none;
}

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

.footer-col ul li a {
    color: #ccc;
}

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

.social-media a {
    display: inline-block;
    color: #fff;
    background-color: var(--primary-color);
    width: 35px;
    height: 35px;
    line-height: 35px;
    text-align: center;
    border-radius: 50%;
    margin-right: 10px;
    font-size: 1.1em;
    transition: background-color 0.3s ease;
}

.social-media a:hover {
    background-color: var(--accent-color);
}

.payment-icons img, .partners-logos img {
    margin-right: 10px;
    margin-bottom: 10px;
    max-height: 30px;
    filter: grayscale(100%) brightness(150%); /* Make icons blend with dark theme */
    transition: filter 0.3s ease;
}

.payment-icons img:hover, .partners-logos img:hover {
    filter: grayscale(0%) brightness(100%);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.copyright {
    margin-bottom: 5px;
}

.disclaimer {
    font-size: 0.8em;
    color: #888;
}

/* Back to Top Button (CSS part) */
.back-to-top {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color, #e44d26);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    z-index: 999;
    transition: background-color 0.3s ease;
}
.back-to-top:hover {
    background-color: var(--accent-color, #f7b731);
}

/* Responsive Styles */
@media (max-width: 992px) {
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    .nav-item {
        margin: 5px 10px;
    }
    .nav-item.has-submenu .submenu {
        position: static; /* Stack submenu items */
        box-shadow: none;
        padding-left: 20px;
        background-color: transparent;
        border: none;
    }
}

@media (max-width: 768px) {
    .header-top {
        flex-wrap: wrap;
        justify-content: center;
    }
    .logo {
        width: 100%;
        text-align: center;
        margin-bottom: 15px;
    }
    .header-actions {
        width: 100%;
        justify-content: center;
        order: 2; /* Move actions below logo on mobile */
    }
    .mobile-menu-toggle {
        display: block; /* Show on mobile */
        order: -1; /* Place it first in actions */
        margin-right: auto; /* Push to left */
        position: absolute;
        left: 15px;
        top: 25px;
    }
    .main-nav {
        display: none; /* Hidden by default on mobile */
        width: 100%;
        background-color: var(--bg-color-dark);
        border-radius: 0;
        margin-top: 10px;
        border-top: 1px solid var(--border-color);
    }
    .main-nav.active {
        display: block;
    }
    .nav-menu {
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-item {
        width: 100%;
        margin: 0;
    }
    .nav-link {
        padding: 12px 20px;
        border-bottom: 1px solid var(--border-color);
    }
    .footer-widgets {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .social-media {
        margin-top: 15px;
    }
    .payment-icons, .partners-logos {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .header-actions {
        flex-direction: column;
        gap: 15px;
    }
    .btn {
        width: 80%;
    }
    .language-selector select {
        width: 80%;
    }
}
/* 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;
  }
}