* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Whitney', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

:root {
    --primary: #5865F2;
    --dark: #23272A;
    --darker: #1e2124;
    --light: #F6F6F6;
    --green: #57F287;
    --text: #2C2F33;
    --gray: #99AAB5;
}

body {
    background-color: var(--light);
    color: var(--text);
    line-height: 1.6;
}

/* 导航栏样式 */
nav {
    background-color: white;
    padding: 15px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 16px;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    font-size: 14px;
}

.btn-login {
    background-color: transparent;
    color: var(--text);
}

.btn-login:hover {
    color: var(--primary);
    text-decoration: underline;
}

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

.btn-primary:hover {
    background-color: #4752C4;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(88, 101, 242, 0.3);
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(to bottom right, #5865F2, #8B5CF6);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
    height: 700px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 56px;
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.btn-white {
    background-color: white;
    color: var(--dark);
    padding: 16px 32px;
    border-radius: 28px;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
}

.btn-dark {
    background-color: var(--dark);
    color: white;
    padding: 16px 32px;
    border-radius: 28px;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-white:hover {
    background-color: #f0f0f0;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn-dark:hover {
    background-color: #2C2F33;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* 特色区域样式 */
.features {
    padding: 100px 20px;
}

.feature {
    display: flex;
    max-width: 1200px;
    margin: 0 auto 120px;
    align-items: center;
    justify-content: space-between;
}

.feature:nth-child(even) {
    flex-direction: row-reverse;
}

.feature-content {
    flex: 1;
    padding: 0 50px;
}

.feature-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--darker);
}

.feature-content p {
    font-size: 20px;
    color: var(--text);
    opacity: 0.9;
}

.feature-image {
    flex: 1;
    text-align: center;
}

.feature-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* CTA区域样式 */
.cta {
    background: linear-gradient(to right, #8B5CF6, #5865F2);
    color: white;
    padding: 120px 20px;
    text-align: center;
    position: relative;
}

.cta h2 {
    font-size: 40px;
    margin-bottom: 40px;
}

.cta p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

/* 页脚样式 */
footer {
    background-color: var(--darker);
    color: white;
    padding: 80px 20px 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-column h3 {
    color: var(--primary);
    font-size: 24px;
    margin-bottom: 20px;
}

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

.footer-column ul li {
    margin-bottom: 15px;
}

.footer-column ul li a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.social-links a {
    color: white;
    font-size: 24px;
    transition: color 0.3s;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 60px auto 0;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
}

.footer-button {
    background-color: var(--primary);
    color: white;
    padding: 12px 24px;
    border-radius: 20px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.footer-button:hover {
    background-color: #4752C4;
    box-shadow: 0 5px 15px rgba(88, 101, 242, 0.3);
}

/* 响应式设计 */
@media (max-width: 900px) {
    .feature {
        flex-direction: column;
        text-align: center;
    }

    .feature:nth-child(even) {
        flex-direction: column;
    }

    .feature-content {
        margin-bottom: 40px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    nav {
        padding: 15px 20px;
    }

    .nav-links {
        display: none;
    }
}