* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}
body {
    background: #ffffff;
    color: #333;
    line-height: 1.7;
}
/* 导航栏 */
header {
    width: 100%;
    height: 70px;
    box-shadow: 0 1px 10px #eee;
    position: sticky;
    top: 0;
    background: #fff;
    z-index: 999;
}
.nav-wrap {
    width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2563eb;
}
.nav-menu {
    display: flex;
    gap: 36px;
}
.nav-menu a {
    text-decoration: none;
    color: #444;
    font-size: 15px;
    transition: 0.2s;
}
.nav-menu a:hover {
    color: #2563eb;
}
.nav-btn-group {
    display: flex;
    gap: 16px;
}
.btn {
    padding: 8px 20px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: 0.2s;
}
.btn-free {
    background: #f1f5f9;
    color: #2563eb;
}
.btn-free:hover {
    background: #e2e8f0;
}
.btn-vip {
    background: #2563eb;
    color: #fff;
}
.btn-vip:hover {
    background: #1d4ed8;
}

/* 通用容器 */
.container {
    width: 1200px;
    margin: 0 auto;
    padding: 80px 0;
}
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 32px;
    color: #111;
    margin-bottom: 12px;
}
.section-title p {
    color: #666;
    font-size: 16px;
}

/* 首屏Banner */
.banner {
    width: 100%;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    padding: 100px 0;
}
.banner-content {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}
.banner-text {
    flex: 1;
}
.banner-text h1 {
    font-size: 44px;
    line-height: 1.3;
    margin-bottom: 24px;
    color: #0f172a;
}
.banner-text h1 span {
    color: #2563eb;
}
.banner-text p {
    font-size: 18px;
    color: #555;
    margin-bottom: 36px;
}
.banner-btn {
    display: flex;
    gap: 20px;
}
.banner-img {
    flex: 1;
    border-radius: 12px;
    box-shadow: 0 8px 30px #e2e8f0;
    overflow: hidden;
}
.banner-img img {
    width: 100%;
    display: block;
}

/* 四大软件预览轮播 */
.swiper-box {
    width: 100%;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 4px 20px #eee;
    position: relative;
    height: 520px;
}
.swiper-list {
    width: 400%;
    height: 100%;
    display: flex;
    transition: 0.6s ease;
}
.swiper-item {
    width: 25%;
    height: 100%;
}
.swiper-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.swiper-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.8);
    border: none;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
}
.swiper-prev {
    left: 20px;
}
.swiper-next {
    right: 20px;
}

/* 免费&付费功能对比板块 */
.func-compare {
    display: flex;
    gap: 40px;
}
.func-card {
    flex: 1;
    border-radius: 12px;
    padding: 40px 32px;
    border: 1px solid #eee;
}
.func-free {
    border-top: 6px solid #10b981;
}
.func-vip {
    border-top: 6px solid #2563eb;
}
.func-card h3 {
    font-size: 22px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.func-free h3 span {
    display: inline-block;
    width: 24px;
    height: 24px;
    background: #10b981;
    border-radius: 50%;
    color: #fff;
    text-align: center;
    font-size: 14px;
}
.func-vip h3 span {
    display: inline-block;
    width: 24px;
    height: 24px;
    background: #2563eb;
    border-radius: 50%;
    color: #fff;
    text-align: center;
    font-size: 14px;
}
.func-list {
    list-style: none;
}
.func-list li {
    padding: 10px 0;
    border-bottom: 1px dashed #eee;
    display: flex;
    align-items: center;
    gap: 10px;
}
.func-list li::before {
    content: "✓";
    color: #10b981;
    font-weight: bold;
}

/* 核心优势 */
.advantage-wrap {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.adv-card {
    padding: 30px 24px;
    border-radius: 10px;
    background: #f8fafc;
}
.adv-card h4 {
    font-size: 18px;
    margin-bottom: 12px;
    color: #1e293b;
}
.adv-card p {
    color: #555;
    font-size: 14px;
}

/* FAQ */
.faq-item {
    border: 1px solid #eee;
    border-radius: 8px;
    margin-bottom: 14px;
    overflow: hidden;
}
.faq-que {
    padding: 16px 20px;
    background: #f8fafc;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}
.faq-ans {
    padding: 0 20px;
    height: 0;
    overflow: hidden;
    transition: 0.3s;
    color: #555;
}
.faq-item.active .faq-ans {
    padding: 16px 20px;
    height: auto;
}

/* 页脚 */
footer {
    background: #f1f5f9;
    padding: 50px 0 30px;
    margin-top: 40px;
}
.footer-wrap {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
}
.footer-col h4 {
    margin-bottom: 16px;
    color: #1e293b;
}
.footer-col a {
    display: block;
    color: #666;
    text-decoration: none;
    margin: 8px 0;
    font-size: 14px;
}
.copyright {
    width: 1200px;
    margin: 40px auto 0;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    color: #888;
    font-size: 13px;
}