.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.section-title p {
    color: var(--text-light);
}

/* --- Hero 区域 --- */
.hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    color: var(--white);
    padding: 100px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: #cbd5e1;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* --- 数据统计条 --- */
.stats-bar {
    background: var(--white);
    padding: 40px 0;
    margin-top: -40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    position: relative;
    z-index: 10;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    text-align: center;
    gap: 20px;
}

.stat-item h3 {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 800;
}

.stat-item p {
    color: var(--text-light);
}

/* --- 核心优势 --- */
.features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: 0.3s;
}

.feature-card:hover {
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.icon-box {
    width: 50px;
    height: 50px;
    background: #e0e7ff;
    color: var(--primary-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

/* --- 热门域名 --- */
.market {
    background: #f1f5f9;
    padding: 80px 0;
}

.domain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.domain-card {
    background: var(--white);
    padding: 20px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
}

.domain-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 5px;
}

.domain-tag {
    font-size: 0.8rem;
    background: #dcfce7;
    color: #166534;
    padding: 2px 8px;
    border-radius: 4px;
    align-self: flex-start;
    margin-bottom: 15px;
}

.domain-price {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.domain-price span {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 400;
}

.rent-btn {
    width: 100%;
    padding: 10px;
    background: var(--text-main);
    color: var(--white);
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

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

/* --- 移动端适配 (Responsive) --- */
.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links, .auth-buttons {
        display: none;
    }

    /* 简化处理，实际开发可加JS切换 */
    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-btns {
        flex-direction: column;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .stats-bar {
        padding: 30px 20px;
    }

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

    /* 简单的移动端菜单展示逻辑 (需要JS配合，此处仅做CSS布局展示) */
    nav {
        padding: 10px 0;
    }
}