/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 92%;
    max-width: 1200px;
    margin: 0 auto;
}

a {
    text-decoration: none;
}

ul {
    list-style: none;
}

/* 顶部导航 */
header {
    background: #fff;
    padding: 14px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 99;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.logo {
    font-size: 22px;
    font-weight: bold;
    color: #007aff;
}

.logo span {
    color: #333;
}

.header-tip {
    font-size: 14px;
    color: #666;
}

/* 横幅 */
.banner {
    background: linear-gradient(135deg, #007aff, #5ac8fa);
    color: #fff;
    text-align: center;
    padding: 50px 0;
}

.banner h1 {
    font-size: 26px;
    margin-bottom: 10px;
}

.banner p {
    font-size: 16px;
    opacity: 0.95;
}

/* 数据统计 */
.stats {
    background: #fff;
    padding: 25px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    text-align: center;
}

.stat-item .num {
    font-size: 24px;
    font-weight: bold;
    color: #007aff;
}

.stat-item .text {
    font-size: 13px;
    color: #666;
    margin-top: 4px;
}

/* 通用区块 */
.section {
    padding: 50px 0;
}

.section-title {
    text-align: center;
    font-size: 24px;
    margin-bottom: 30px;
    color: #222;
}

/* 优势 */
.advantages-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.advantage-card {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}

.advantage-card h3 {
    font-size: 18px;
    margin: 12px 0;
    color: #007aff;
}

.advantage-card p {
    color: #666;
    font-size: 14px;
}

/* 价格套餐 */
.price-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.price-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.price-card:hover {
    transform: translateY(-4px);
}

.price-card.hot {
    border: 2px solid #ff9500;
}

.price-header {
    background: #007aff;
    color: #fff;
    padding: 18px;
    text-align: center;
}

.price-header.hot {
    background: #ff9500;
}

.price-header h3 {
    font-size: 20px;
}

.price-body {
    padding: 25px;
}

.price-num {
    font-size: 32px;
    font-weight: bold;
    color: #007aff;
    text-align: center;
    margin-bottom: 18px;
}

.price-num span {
    font-size: 14px;
    color: #666;
    font-weight: normal;
}

.price-list li {
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
    color: #555;
    font-size: 14px;
}

.btn {
    display: block;
    width: 100%;
    padding: 14px;
    background: #007aff;
    color: #fff;
    text-align: center;
    border-radius: 8px;
    font-size: 16px;
    margin-top: 10px;
    transition: background 0.3s;
}

.btn:hover {
    background: #0066cc;
}

/* 步骤 */
.steps {
    background: #fff;
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
}

.step-num {
    width: 55px;
    height: 55px;
    background: #007aff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin: 0 auto 15px;
}

.step-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.step-item p {
    color: #666;
    font-size: 14px;
}

/* 评价 */
.reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.review-card {
    background: #fff;
    padding: 22px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}

.review-card p {
    color: #555;
    font-style: italic;
    font-size: 14px;
}

/* FAQ */
.faq {
    background: #fff;
}

.faq-item {
    max-width: 800px;
    margin: 0 auto 18px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f0f0f0;
}

.faq-question {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 6px;
    color: #222;
}

.faq-answer {
    color: #666;
    font-size: 14px;
}

/* 底部 */
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 35px 0;
}

footer p {
    margin: 8px 0;
    color: #ccc;
    font-size: 13px;
}

/* ====================== 响应式适配 ====================== */
@media (min-width: 576px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) {
    .banner h1 {
        font-size: 34px;
    }
    .stats-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .price-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .reviews-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .section-title {
        font-size: 28px;
    }
}