/* General Body & Typography */
:root {
    --primary-green: #28a745; /* A vibrant green for accents */
    --secondary-gold: #ffc107; /* A rich gold for highlights */
    --dark-bg: #1a1a1a; /* Dark background for sections */
    --light-text: #f8f9fa; /* Light text on dark backgrounds */
    --medium-gray: #adb5bd; /* Medium gray for secondary text */
    --border-color: #343a40; /* Darker border color */
    --hover-green: #218838;
    --hover-gold: #e0a800;
    --header-height: 80px;
    --top-bar-height: 30px;
}

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

body {
    font-family: 'Roboto', sans-serif; /* A modern, clean font */
    line-height: 1.6;
    color: var(--light-text);
    background-color: #0d1117; /* A very dark, almost black background */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    border: none;
}

.btn-login {
    background-color: transparent;
    color: var(--secondary-gold);
    border: 2px solid var(--secondary-gold);
}

.btn-login:hover {
    background-color: var(--secondary-gold);
    color: var(--dark-bg);
}

.btn-register {
    background-color: var(--primary-green);
    color: var(--light-text);
    border: 2px solid var(--primary-green);
    margin-left: 10px;
}

.btn-register:hover {
    background-color: var(--hover-green);
    border-color: var(--hover-green);
}

/* Header Styles */
.main-header {
    background-color: var(--dark-bg);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top-bar {
    background-color: #0d1117; /* Even darker for top bar */
    padding: 8px 0;
    font-size: 0.85em;
    border-bottom: 1px solid var(--border-color);
}

.header-top-bar .top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--medium-gray);
}

.header-top-bar .contact-info span {
    margin-right: 20px;
}

.header-top-bar .contact-info span i {
    color: var(--primary-green);
    margin-right: 5px;
}

.header-top-bar .language-selector select {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--light-text);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    appearance: none; /* Remove default arrow */
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg fill="%23f8f9fa" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 16px;
}

.header-top-bar .language-selector select option {
    background-color: var(--dark-bg);
    color: var(--light-text);
}

.header-main-nav {
    padding: 15px 0;
}

.header-main-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
}

.brand-logo {
    height: 40px; /* Adjust logo size */
    margin-right: 10px;
}

.brand-name {
    color: var(--light-text);
    font-size: 1.8em;
    font-weight: bold;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.main-navigation {
    flex-grow: 1;
    margin-left: 30px;
}

.nav-list {
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav-item {
    position: relative;
    margin: 0 15px;
}

.nav-link {
    color: var(--light-text);
    font-weight: 500;
    padding: 10px 0;
    position: relative;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
}

.nav-link i {
    margin-right: 5px;
    color: var(--secondary-gold);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-green);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-green);
    transition: width 0.3s ease;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    min-width: 180px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 10;
    padding: 10px 0;
}

.nav-item.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 8px 15px;
    color: var(--light-text);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.dropdown-menu li a:hover {
    background-color: var(--primary-green);
    color: var(--dark-bg);
}

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

.search-box {
    position: relative;
    margin-right: 20px;
}

.search-input {
    background-color: #2c2c2c;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 8px 15px;
    padding-right: 40px; /* Space for icon */
    color: var(--light-text);
    font-size: 0.9em;
    width: 200px;
    transition: width 0.3s ease;
}

.search-input::placeholder {
    color: var(--medium-gray);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-green);
    width: 220px;
}

.search-button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--medium-gray);
    cursor: pointer;
    font-size: 1.1em;
    padding: 5px;
    transition: color 0.3s ease;
}

.search-button:hover {
    color: var(--primary-green);
}

.hamburger-menu {
    display: none; /* Hidden by default on desktop */
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1100;
    margin-left: 15px;
}

.hamburger-menu .bar {
    width: 100%;
    height: 3px;
    background-color: var(--light-text);
    border-radius: 5px;
    transition: all 0.3s ease-in-out;
}

.hamburger-menu.open .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger-menu.open .bar:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.open .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Footer Styles */
.main-footer {
    background-color: var(--dark-bg);
    color: var(--medium-gray);
    padding-top: 50px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9em;
}

.footer-top {
    padding-bottom: 40px;
}

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

.footer-heading {
    color: var(--light-text);
    font-size: 1.2em;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-heading::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-green);
}

.footer-col p {
    margin-bottom: 15px;
}

.footer-col ul {
    padding-left: 0;
}

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

.footer-col ul li a {
    color: var(--medium-gray);
    transition: color 0.3s ease;
}

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

.social-links a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: #2c2c2c;
    border-radius: 50%;
    color: var(--light-text);
    font-size: 1.2em;
    margin-right: 10px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-green);
    color: var(--dark-bg);
}

.contact-details p {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.contact-details p i {
    margin-right: 10px;
    color: var(--secondary-gold);
}

.payment-icons, .license-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
}

.payment-icon, .license-icon {
    height: 30px;
    filter: grayscale(100%) brightness(150%); /* Make them look consistent */
    transition: filter 0.3s ease;
}

.payment-icon:hover, .license-icon:hover {
    filter: grayscale(0%) brightness(100%);
}

.security-heading {
    margin-top: 30px;
}

.footer-bottom {
    background-color: #0d1117;
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-bottom .copyright,
.footer-bottom .disclaimer {
    margin-bottom: 10px;
    color: var(--medium-gray);
}

/* Responsive Design */
@media (max-width: 992px) {
    .main-navigation {
        display: none; /* Hide nav by default on smaller screens */
        flex-direction: column;
        position: absolute;
        top: calc(var(--header-height) + var(--top-bar-height)); /* Adjust based on header height */
        left: 0;
        width: 100%;
        background-color: var(--dark-bg);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
        padding: 20px 0;
        z-index: 999;
        max-height: calc(100vh - var(--header-height) - var(--top-bar-height));
        overflow-y: auto;
    }

    .main-navigation.active {
        display: flex;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-item {
        margin: 10px 0;
        width: 100%;
    }

    .nav-link {
        padding: 10px 20px;
        width: 100%;
        justify-content: flex-start;
    }

    .nav-link::after {
        left: 20px;
    }

    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        border: none;
        background-color: #2c2c2c;
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        padding: 0;
        margin-top: 5px;
        display: none; /* Hidden by default for mobile dropdowns */
    }

    .nav-item.dropdown.dropdown-open .dropdown-menu {
        display: block;
    }

    .dropdown-menu li a {
        padding-left: 40px;
    }

    .header-actions {
        margin-left: auto;
    }

    .hamburger-menu {
        display: flex;
    }

    .header-main-nav .container {
        flex-wrap: wrap;
    }

    .navbar-brand {
        order: 1;
    }
    .hamburger-menu {
        order: 2;
    }
    .header-actions {
        order: 3;
        width: 100%;
        justify-content: flex-end;
        margin-top: 15px;
    }
    .search-box {
        margin-right: 10px;
    }
    .search-input {
        width: 150px;
    }
    .btn-register {
        margin-left: 5px;
    }
}

@media (max-width: 768px) {
    .header-top-bar .top-bar-content {
        flex-direction: column;
        align-items: flex-start;
    }
    .header-top-bar .contact-info {
        margin-bottom: 10px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-heading::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .social-links {
        justify-content: center;
        display: flex;
    }
    .payment-icons, .license-logos {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .brand-name {
        font-size: 1.5em;
    }
    .header-top-bar .contact-info span {
        margin-right: 10px;
    }
    .btn {
        padding: 8px 15px;
        font-size: 0.9em;
    }
    .search-input {
        width: 120px;
        padding: 6px 10px;
        padding-right: 35px;
    }
    .header-actions {
        flex-wrap: wrap;
        justify-content: center;
    }
    .search-box {
        width: 100%;
        margin-bottom: 10px;
        margin-right: 0;
    }
    .search-input {
        width: 100%;
    }
    .btn-login, .btn-register {
        flex: 1;
        margin: 0 5px;
    }
}

/* FontAwesome CDN for icons */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css');
/* 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;
  }
}