/* Import Google Fonts - Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* Font Awesome for Icons */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css');

/* CSS Variables */
:root {
    --primary-color: #0a0a0a; /* Dark background */
    --secondary-color: #1a1a1a; /* Slightly lighter dark */
    --accent-color: #d4af37; /* Gold */
    --green-accent: #4CAF50; /* Green */
    --text-color: #e0e0e0; /* Light grey text */
    --light-text-color: #f5f5f5;
    --dark-text-color: #333333;
    --border-color: #333333;
    --hover-color: #ffda79; /* Lighter gold for hover */
    --transition-speed: 0.3s;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--primary-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-speed);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

button, input, select, textarea {
    font-family: 'Poppins', sans-serif;
    outline: none;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

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

.btn-primary:hover {
    background-color: var(--hover-color);
    color: var(--dark-text-color);
}

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

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

.btn-accent {
    background-color: var(--green-accent);
    color: white;
}

.btn-accent:hover {
    background-color: #3e8e41; /* Darker green */
}

/* Header Styles */
.main-header {
    background-color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top-bar {
    background-color: var(--secondary-color);
    padding: 8px 0;
    font-size: 0.85em;
    border-bottom: 1px solid var(--border-color);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.contact-info span {
    margin-right: 20px;
    color: var(--text-color);
}

.contact-info span i {
    margin-right: 5px;
    color: var(--accent-color);
}

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

.top-bar-actions .top-link {
    color: var(--text-color);
    margin-left: 15px;
}

.top-bar-actions .top-link i {
    margin-right: 5px;
    color: var(--accent-color);
}

.language-selector {
    margin-left: 15px;
    position: relative;
    display: flex;
    align-items: center;
}

.language-selector i {
    margin-right: 5px;
    color: var(--accent-color);
}

.language-selector select {
    background-color: transparent;
    color: var(--text-color);
    border: none;
    padding: 3px 5px;
    appearance: none; /* Remove default arrow */
    cursor: pointer;
    font-size: 0.85em;
}

.language-selector select option {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

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

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

.navbar-brand .logo {
    height: 50px; /* Adjust as needed */
    width: auto;
}

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

.hamburger-menu .bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--accent-color);
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
}

.main-nav-menu {
    flex-grow: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    gap: 25px;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--light-text-color);
    font-weight: 500;
    padding: 10px 0;
    position: relative;
    transition: color var(--transition-speed);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
}

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

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--secondary-color);
    min-width: 180px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.4);
    z-index: 1;
    border-radius: 5px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--transition-speed) ease, transform var(--transition-speed) ease, visibility var(--transition-speed);
}

.dropdown-menu li a {
    color: var(--light-text-color);
    padding: 12px 16px;
    display: block;
    text-align: left;
    white-space: nowrap;
}

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

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

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 8px 15px;
    color: var(--light-text-color);
    width: 180px;
    transition: width var(--transition-speed) ease;
}

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

.search-input:focus {
    border-color: var(--accent-color);
    width: 220px;
}

.search-button {
    background: none;
    border: none;
    color: var(--accent-color);
    position: absolute;
    right: 10px;
    cursor: pointer;
    font-size: 1.1em;
}

.btn-download {
    background-color: var(--green-accent);
    color: white;
    padding: 8px 15px;
}

.btn-login {
    background-color: var(--secondary-color);
    color: var(--light-text-color);
    border: 1px solid var(--border-color);
    padding: 8px 15px;
}

.btn-register {
    background-color: var(--accent-color);
    color: var(--dark-text-color);
    padding: 8px 15px;
}

/* Mobile Navigation Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 999;
    display: none; /* Hidden by default */
}

/* Footer Styles */
.main-footer {
    background-color: var(--secondary-color);
    color: var(--text-color);
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.footer-top {
    padding-bottom: 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: var(--light-text-color);
    font-size: 1.2em;
    margin-bottom: 20px;
    position: relative;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 40px;
    height: 2px;
    background-color: var(--accent-color);
}

.footer-col p {
    font-size: 0.9em;
    line-height: 1.8;
    margin-bottom: 15px;
}

.footer-logo {
    margin-bottom: 15px;
    height: 40px;
    width: auto;
}

.social-links a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--accent-color);
    font-size: 1.1em;
    margin-right: 10px;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

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

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

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

.footer-col ul li a {
    color: var(--text-color);
    font-size: 0.9em;
    transition: color var(--transition-speed);
}

.footer-col ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-email-link {
    display: block;
    margin-bottom: 20px;
    color: var(--accent-color);
    font-size: 0.95em;
}

.footer-email-link i {
    margin-right: 8px;
}

.app-download-links {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.app-download-links img {
    height: 40px;
    width: auto;
    border-radius: 5px;
    transition: transform var(--transition-speed);
}

.app-download-links img:hover {
    transform: translateY(-3px);
}

.payment-methods, .licensing-info {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.payment-methods h3, .licensing-info h3 {
    font-size: 1.1em;
    color: var(--light-text-color);
    margin-bottom: 15px;
}

.payment-icons, .licensing-info img {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
}

.payment-icons img {
    height: 30px;
    width: auto;
    filter: grayscale(80%);
    opacity: 0.7;
    transition: filter var(--transition-speed), opacity var(--transition-speed);
}

.payment-icons img:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.licensing-info p {
    font-size: 0.85em;
    margin-bottom: 15px;
    color: var(--text-color);
}

.licensing-info img {
    height: 40px;
    width: auto;
    margin-right: 10px;
}

.footer-bottom {
    background-color: var(--primary-color);
    padding: 20px 0;
    text-align: center;
    font-size: 0.8em;
    border-top: 1px solid var(--border-color);
    margin-top: 30px;
}

.footer-bottom p {
    margin: 0;
    color: var(--text-color);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--accent-color);
    color: var(--primary-color);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5em;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 999;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background-color: var(--hover-color);
}
body.no-scroll {
    overflow: hidden; /* For mobile menu */
}

/* Responsive Design */
@media (max-width: 992px) {
    .main-nav-menu {
        justify-content: flex-start;
    }
    .nav-list {
        gap: 15px;
    }
    .header-actions .search-box {
        display: none; /* Hide search on smaller screens */
    }
}

@media (max-width: 768px) {
    .header-top-bar {
        display: none; /* Hide top bar on very small screens */
    }

    .header-main-nav .container {
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .navbar-brand {
        order: 1;
    }

    .hamburger-menu {
        display: block;
        order: 2;
    }

    .header-actions {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: 15px;
        gap: 8px;
    }

    .header-actions .btn {
        padding: 8px 12px;
        font-size: 0.9em;
    }

    .main-nav-menu {
        position: fixed;
        top: 0;
        right: -300px; /* Start off-screen */
        width: 280px;
        height: 100%;
        background-color: var(--primary-color);
        flex-direction: column;
        padding-top: 80px;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
        transition: right 0.3s ease-in-out;
        z-index: 1000;
        overflow-y: auto;
    }

    .main-nav-menu.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        padding: 0 20px;
        gap: 0;
    }

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

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

    .nav-link {
        padding: 15px 0;
        display: block;
    }

    .nav-item.dropdown .dropdown-menu {
        position: static;
        display: none;
        background-color: var(--secondary-color);
        box-shadow: none;
        transform: none;
        opacity: 1;
        visibility: visible;
        border-radius: 0;
        margin-top: 0;
    }

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

    .dropdown-menu li a {
        padding-left: 30px;
    }

    .mobile-nav-overlay.active {
        display: block;
    }

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

    .footer-col h3::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .social-links {
        justify-content: center;
    }

    .app-download-links, .payment-icons, .licensing-info img {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .header-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .header-actions .btn {
        width: 100%;
        margin-bottom: 5px;
    }
    .header-actions .btn:last-child {
        margin-bottom: 0;
    }
}
/* 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;
  }
}