/* 头部样式 (与官网风格统一) */
    .header {
        background: #ffffff;
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
        padding: 16px 0;
        position: sticky;
        top: 0;
        z-index: 100;
    }
    .container-ip {
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 24px;
    }
    .header .container-ip {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
    }
    .logo img {
        height: 42px;
    }
    .nav {
        display: flex;
        gap: 32px;
        list-style: none;
    }
    .nav li a {
        text-decoration: none;
        color: #1f2937;
        font-weight: 500;
        font-size: 16px;
        transition: 0.2s;
    }
    .nav li.active a,
    .nav li a:hover {
        color: #f5a623;
    }
    .header-right {
        display: flex;
        align-items: center;
        gap: 24px;
    }
    .language {
        display: flex;
        align-items: center;
        gap: 6px;
        cursor: pointer;
    }
    .earth {
        width: 18px;
    }
    /* 移动端菜单占位 */
    .menu-handler {
        display: none;
        font-size: 24px;
        cursor: pointer;
    }
    @media (max-width: 768px) {
        .nav {
            display: none;
        }
        .menu-handler {
            display: block;
        }
    }

   /* 产品介绍区块 */
    .section-title {
    text-align: center;
    margin: 70px 0 40px;
    }
    .section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(145deg, #f5a623, #dd7a2c);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    }
    .section-title p {
    color: #5b6e8c;
    margin-top: 12px;
    font-size: 1rem;
    }

    /* 核心布局：一行显示3个卡片（桌面端） */
    .ip-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin: 170px 0 60px;
    }

    /* 卡片样式 */
    .ip-card {
    background: #ffffff;
    border-radius: 36px;
    overflow: hidden;
    box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.2, 0, 0, 1);
    border: 1px solid #f0ede8;
    }
    .ip-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 45px -15px rgba(0, 0, 0, 0.2);
    border-color: #f5a62340;
    }
    .card-img-mododo {
    height: 260px;
    background: url(../images/mododo.jpg) no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    }
    .ip-avatar {
    width: 150px;
    height: 150px;
    background: #ffe3c9;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4.5rem;
    box-shadow: 0 15px 25px rgba(0,0,0,0.1);
    transition: 0.3s;
    }
    .ip-card:hover .ip-avatar {
    transform: scale(1.02);
    }
    .card-content {
    padding: 24px 24px 32px;
    }
    .ip-name {
    font-size: 1.7rem;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 8px;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    }
    .ip-badge {
    background: #f5a62320;
    color: #f5a623;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 40px;
    white-space: nowrap;
    }
    .ip-desc {
    color: #4b5565;
    margin: 14px 0 16px;
    line-height: 1.5;
    font-size: 0.9rem;
    }
    .ip-feature {
    display: flex;
    gap: 16px;
    border-top: 1px solid #f0ebe4;
    padding-top: 18px;
    margin-top: 10px;
    font-size: 0.8rem;
    color: #f5a623;
    }
    .ip-feature span i {
    margin-right: 6px;
    }
    .btn-more {
    display: inline-block;
    margin-top: 20px;
    background: #f5f2ef;
    padding: 8px 20px;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #f97316;
    transition: 0.2s;
    text-decoration: none;
    }
    .btn-more:hover {
    background: #f5a623;
    color: white;
    }
/* 响应式：平板（768px - 1024px）一行2个，手机一行1个 */
    @media (max-width: 1024px) and (min-width: 769px) {
        .ip-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
    }
    @media (max-width: 768px) {
        .ip-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .banner-content h1 {
            font-size: 2.2rem;
        }
        .section-title h2 {
            font-size: 1.8rem;
        }
        .story-section {
            padding: 32px 20px;
        }
        .container {
            padding: 0 20px;
        }
        .ip-name {
            font-size: 1.5rem;
        }
    }

    /* 动画效果 */
    .wow-fade {
        animation: fadeUp 0.6s ease forwards;
    }
    @keyframes fadeUp {
        from { opacity: 0; transform: translateY(25px);}
        to { opacity: 1; transform: translateY(0);}
    }
    .totop {
        position: fixed;
        bottom: 30px;
        right: 20px;
        background: #f5a623;
        width: 44px;
        height: 44px;
        border-radius: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        cursor: pointer;
        box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        z-index: 99;
        opacity: 0;
        transition: 0.2s;
        pointer-events: none;
    }
    .totop.show {
        opacity: 1;
        pointer-events: auto;
    }