:root {
    --primary-color: #2ecc71;
    --primary-dark: #27ae60;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gradient-primary: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-info: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.menu-background {
    background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s;
}

.menu-background.open {
    background: rgba(46, 204, 113, 0.98);
}

.menu {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    position: relative;
}

.menu-left .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s;
}

.menu-left .logo:hover {
    opacity: 0.9;
}

.menu-left .logo i {
    font-size: 28px;
}

.menu-right {
    display: flex;
    align-items: center;
    gap: 30px;
}

.menus {
    display: flex;
    list-style: none;
    gap: 5px;
}

.menu-item {
    position: relative;
}

.menu-item > a {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 10px 15px;
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border-radius: 5px;
}

.menu-item > a:hover,
.menu-item.active > a {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
}

.btn-box {
    display: none;
    gap: 10px;
}

.btn-free-use {
    padding: 10px 25px;
    border-radius: 5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    background: #fff;
    color: #27ae60;
    text-decoration: none;
}

.btn-free-use:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 24px;
    color: #fff;
    padding: 10px;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.menu-toggle.active {
    color: #fff;
}

@media (min-width: 769px) {
    .btn-box {
        display: flex;
    }
}

@media (max-width: 768px) {
    .menu-right {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(46, 204, 113, 0.98);
        flex-direction: column;
        padding: 80px 20px 20px;
        gap: 20px;
        transition: right 0.3s ease;
        z-index: 1000;
        overflow-y: auto;
    }

    .menu-right.open {
        right: 0;
    }

    .menus {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }

    .menu-item > a {
        padding: 15px;
        font-size: 18px;
        border-radius: 8px;
    }

    .btn-box {
        display: flex;
        width: 100%;
        margin-top: 20px;
    }

    .btn-free-use {
        width: 100%;
        text-align: center;
        padding: 15px;
        font-size: 18px;
        border-radius: 8px;
    }

    .menu-toggle {
        display: block;
    }

    .menu-background.open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        pointer-events: auto;
    }
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.title-underline {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 0 auto;
    border-radius: 2px;
}

.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-brand h4 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: #aaa;
}

.footer h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

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

.footer-links li a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links li a:hover {
    color: #fff;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    color: #aaa;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact li i {
    color: var(--primary-color);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: #aaa;
    margin: 0;
}

.footer-bottom a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: #fff;
}