/* 纸飞机下载网站样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden; /* 防止移动端出现横向滚动条 */
}

.zcc39bcontainer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.zcc39bheader {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.zcc39bnav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    position: relative;
}

.zcc39blogo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #667eea;
    text-decoration: none;
}

.zcc39blogo:hover {
    color: #764ba2;
}

.zcc39bnav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.zcc39bnav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.zcc39bnav-menu a:hover {
    color: #667eea;
}

.zcc39bmobile-menu-btn {
    display: none !important;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #333;
    padding: 0;
    z-index: 1050;
    opacity: 1;
    position: static;
}

/* 主要内容区域 */
.zcc39bmain {
    margin-top: 80px;
    padding: 2rem 0;
}

.zcc39bhero {
    padding: 6rem 0;
    color: white;
}

.zcc39bhero .zcc39bcontainer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.zcc39bhero-text {
    max-width: 55%;
    text-align: left;
}

.zcc39bhero-image {
    max-width: 40%;
}

.zcc39bhero-image img {
    max-width: 100%;
    max-height: 320px;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(102,126,234,0.18);
    background: #fff;
    padding: 8px;
    animation: float 4s ease-in-out infinite;
    object-fit: contain;
}

.zcc39bhero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.zcc39bhero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.zcc39bcta-button {
    display: inline-block;
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.zcc39bcta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* 特色区域 */
.zcc39bfeatures {
    background: white;
    padding: 4rem 0;
    margin: 2rem 0;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.zcc39bfeatures h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.zcc39bfeatures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.zcc39bfeature-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #dee2e6;
}

.zcc39bfeature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.zcc39bfeature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.zcc39bfeature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.zcc39bfeature-card p {
    color: #666;
    line-height: 1.6;
}

/* 下载区域 */
.zcc39bdownload-section {
    background: linear-gradient(135deg, #667eea, #764ba2);
    padding: 4rem 0;
    margin: 2rem 0;
    border-radius: 20px;
    color: white;
    text-align: center;
}

.zcc39bdownload-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.zcc39bdownload-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.zcc39bdownload-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.zcc39bdownload-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.zcc39bdownload-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* 关于区域 */
.zcc39babout-section {
    background: white;
    padding: 4rem 0;
    margin: 2rem 0;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.zcc39babout-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.zcc39babout-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.zcc39babout-text p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.zcc39babout-image {
    text-align: center;
}

.zcc39babout-image img {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* 页脚 */
.zcc39bfooter {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.zcc39bfooter-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.zcc39bfooter-section h3 {
    margin-bottom: 1rem;
    color: #667eea;
}

.zcc39bfooter-section p, .zcc39bfooter-section a {
    color: #ccc;
    text-decoration: none;
    line-height: 1.6;
}

.zcc39bfooter-section a:hover {
    color: #667eea;
}

.zcc39bfooter-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #999;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .zcc39bnav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        z-index: 999;
    }

    .zcc39bnav-menu.zcc39bactive {
        display: flex;
    }

    .zcc39bmobile-menu-btn {
        display: block !important;
    }

    .zcc39bhero .zcc39bcontainer {
        flex-direction: column;
        text-align: center;
    }

    .zcc39bhero-text {
        max-width: 100%;
        text-align: center;
    }

    .zcc39bhero-image {
        margin-top: 2rem;
        max-width: 80%;
        margin-left: auto;
        margin-right: auto;
    }

    .zcc39bhero-image img {
        max-height: 180px;
    }

    .zcc39bhero h1 {
        font-size: 2.5rem;
    }

    .zcc39bhero p {
        font-size: 1rem;
    }

    .zcc39bfeatures h2,
    .zcc39bdownload-section h2,
    .zcc39babout-text h2 {
        font-size: 2rem;
    }

    .zcc39babout-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .zcc39bdownload-buttons {
        flex-direction: column;
        align-items: center;
    }

    .zcc39bdownload-btn {
        width: 100%;
        max-width: 300px;
    }

    .zcc39bfeatures-grid,
    .zcc39bwhy-choose-section .zcc39bfeatures-grid {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 480px) {
    .zcc39bcontainer {
        padding: 0 15px;
    }

    .zcc39bhero {
        padding: 2rem 0;
    }

    .zcc39bhero h1 {
        font-size: 1.8rem;
    }

    .zcc39bfeatures,
    .zcc39bdownload-section,
    .zcc39babout-section {
        padding: 2rem 0;
        margin: 1rem 0;
    }

    .zcc39bfeature-card {
        padding: 1.5rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

.zcc39bfade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}