/* 咻一秀官网样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

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

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

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #667eea;
}

.logo img {
    width: 40px;
    height: 40px;
}

.nav {
    display: flex;
    gap: 10px;
}

.nav-btn {
    padding: 10px 24px;
    border-radius: 25px;
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: all 0.3s;
}

.nav-btn:hover {
    background: #f0f0f0;
}

.nav-btn.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

/* 主视觉区 */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    color: white;
}

.hero-title {
    font-size: 56px;
    font-weight: bold;
    margin-bottom: 16px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 22px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 16px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: white;
    color: #667eea;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.3);
}

/* 功能特性 */
.features {
    background: white;
    padding: 60px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: 16px;
    transition: all 0.3s;
}

.feature-item:hover {
    background: #f8f9ff;
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea20, #764ba220);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon img {
    width: 48px;
    height: 48px;
}

.feature-item h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 8px;
}

.feature-item p {
    color: #888;
    font-size: 14px;
}

/* 标签内容区 */
.tab-content {
    display: none;
    background: #f8f9fa;
    padding: 60px 0;
}

.tab-content.active {
    display: block;
}

.section-title {
    font-size: 36px;
    text-align: center;
    color: #333;
    margin-bottom: 10px;
}

.section-desc {
    text-align: center;
    color: #888;
    margin-bottom: 40px;
    font-size: 16px;
}

.subsection-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 20px;
    padding-left: 12px;
    border-left: 4px solid #667eea;
}

/* 视频区 */
.video-section {
    margin-bottom: 50px;
}

.video-wrapper {
    max-width: 800px;
    margin: 0 auto;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    background: #000;
}

.video-wrapper video {
    width: 100%;
    display: block;
}

.video-tip {
    text-align: center;
    color: #999;
    font-size: 13px;
    margin-top: 10px;
}

/* 轮播 */
.carousel {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 16px;
}

.carousel-inner {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-item {
    min-width: 100%;
    text-align: center;
    background: white;
    padding: 20px;
}

.carousel-item img {
    max-width: 300px;
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.carousel-item p {
    margin-top: 15px;
    font-size: 18px;
    color: #333;
    font-weight: 500;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.9);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    transition: all 0.3s;
    z-index: 10;
}

.carousel-btn:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn.prev {
    left: 15px;
}

.carousel-btn.next {
    right: 15px;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ccc;
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    background: #667eea;
    width: 30px;
    border-radius: 6px;
}

/* 截图网格 */
.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
    max-width: 1000px;
    margin: 0 auto;
}

.screenshot-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.screenshot-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.screenshot-card img {
    width: 100%;
    max-width: 280px;
    border-radius: 12px;
}

.screenshot-card p {
    margin-top: 12px;
    font-weight: 500;
    color: #333;
}

/* 下载区 */
.download-section {
    background: white;
    padding: 60px 0;
    text-align: center;
}

.download-buttons {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 30px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px 35px;
    border-radius: 16px;
    text-decoration: none;
    transition: all 0.3s;
    min-width: 260px;
}

.download-btn.ios {
    background: #333;
    color: white;
}

.download-btn.android {
    background: #4CAF50;
    color: white;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.download-btn img {
    width: 40px;
    height: 40px;
}

.download-btn div {
    text-align: left;
}

.download-btn strong {
    display: block;
    font-size: 18px;
    margin-bottom: 4px;
}

.download-btn span {
    font-size: 13px;
    opacity: 0.8;
}

/* 页脚 */
.footer {
    background: #2d2d44;
    color: rgba(255,255,255,0.6);
    text-align: center;
    padding: 30px 0;
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    .hero-subtitle {
        font-size: 16px;
    }
    .section-title {
        font-size: 28px;
    }
    .nav-btn {
        padding: 8px 16px;
        font-size: 14px;
    }
    .download-btn {
        min-width: 100%;
        justify-content: center;
    }
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    /* 手机端：四个介绍项一行两个 */
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    .feature-item {
        padding: 20px 12px;
    }
    .feature-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 12px;
    }
    .feature-icon img {
        width: 36px;
        height: 36px;
    }
    .feature-item h3 {
        font-size: 16px;
    }
    .feature-item p {
        font-size: 12px;
    }
}