* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", system-ui, sans-serif;
}
body {
    background-color: #ffffff;
    color: #1e293b;
    line-height: 1.6;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #f1f5f9;
    padding: 16px 0;
}
.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(to bottom right, #4F46E5, #7C3AED);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}
.logo-text {
    font-size: 20px;
    font-weight: bold;
}
nav {
    display: none;
}
@media (min-width: 768px) {
    nav {
        display: flex;
        gap: 32px;
    }
}
nav a {
    color: #64748b;
    text-decoration: none;
    transition: color 0.3s;
}
nav a:hover {
    color: #4F46E5;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 999px;
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
    border: none;
    cursor: pointer;
}
.btn-primary {
    background: linear-gradient(to right, #4F46E5, #7C3AED);
    color: white;
}
.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-3px);
}
.btn-outline {
    background: white;
    border: 1px solid #e2e8f0;
    color: #475569;
}
.btn-outline:hover {
    border-color: #4F46E5;
    color: #4F46E5;
    transform: translateY(-3px);
}

/* 首页横幅 */
.hero {
    padding: 120px 0 80px;
    background: #f8fafc;
}
.hero-inner {
    display: flex;
    flex-direction: column;
    gap: 48px;
    align-items: center;
}
@media (min-width: 768px) {
    .hero-inner {
        flex-direction: row;
    }
}
.hero-left {
    flex: 1;
}
.hero-right {
    flex: 1;
    position: relative;
}
.hero-tag {
    color: #ef4444;
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 16px;
}
.hero-title {
    font-size: 36px;
    line-height: 1.2;
    margin-bottom: 24px;
    font-weight: bold;
}
.hero-title span {
    background: linear-gradient(to right, #4F46E5, #7C3AED);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-desc {
    color: #64748b;
    font-size: 18px;
    margin-bottom: 32px;
}
.hero-desc strong {
    color: #4F46E5;
}
.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}
.img-box {
    position: relative;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
    border: 1px solid #f1f5f9;
}
.img-box img {
    width: 100%;
    height: auto;
    display: block;
}

/* 通用区块 */
.section {
    padding: 80px 0;
}
.section-white {
    background: white;
}
.section-light {
    background: #f8fafc;
}
.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 16px;
}
.section-desc {
    text-align: center;
    color: #64748b;
    max-width: 700px;
    margin: 0 auto 64px;
}

/* 网格布局 */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (min-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 卡片样式 */
.card {
    background: #f8fafc;
    border-radius: 16px;
    padding: 24px;
    border: 1px solid #f1f5f9;
    transition: all 0.3s;
}
.card:hover {
    transform: translateY(-5px);
    border-color: #4F46E5;
}
.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: rgba(79, 70, 229, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: #4F46E5;
    font-size: 20px;
}
.card h3 {
    font-size: 20px;
    margin-bottom: 8px;
}
.card p {
    color: #64748b;
}

/* 下载专区 */
.download-box {
    background: linear-gradient(to right, rgba(79, 70, 229, 0.1), rgba(124, 58, 237, 0.1));
    border-radius: 24px;
    padding: 48px 32px;
    text-align: center;
    border: 1px solid #f1f5f9;
}
.price-tag {
    display: inline-block;
    background: #ef4444;
    color: white;
    padding: 8px 24px;
    border-radius: 999px;
    font-size: 20px;
    font-weight: bold;
    margin: 24px 0;
}

/* 页脚 */
footer {
    background: #f8fafc;
    padding: 48px 0;
    border-top: 1px solid #f1f5f9;
    text-align: center;
}
.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
}
.copyright {
    color: #94a3b8;
    font-size: 14px;
}