/* 17c一起草 - 原创样式表 */
/* 配色方案：深紫渐变 + 珊瑚粉 + 金色点缀 */

:root {
    --primary-dark: #1a0a2e;
    --primary-purple: #2d1b4e;
    --accent-coral: #ff6b6b;
    --accent-pink: #ff8fab;
    --accent-gold: #ffd700;
    --text-light: #f5f5f5;
    --text-muted: #b8b8b8;
    --card-bg: rgba(45, 27, 78, 0.8);
    --gradient-main: linear-gradient(135deg, #1a0a2e 0%, #2d1b4e 50%, #3d2a5f 100%);
    --gradient-accent: linear-gradient(90deg, #ff6b6b, #ff8fab);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    background: var(--gradient-main);
    color: var(--text-light);
    line-height: 1.8;
    min-height: 100vh;
}

/* 容器布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.container-fluid {
    width: 100%;
    padding: 0 15px;
}

/* 头部导航 - 非sticky */
.site-header {
    background: rgba(26, 10, 46, 0.95);
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 107, 107, 0.3);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-wrap img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 主导航 */
.main-nav {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    background: var(--gradient-accent);
    color: #fff;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: var(--gradient-accent);
    border: none;
    color: #fff;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
}

/* Hero区域 */
.hero-section {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 15px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

.hero-title span {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.cta-btn {
    display: inline-block;
    background: var(--gradient-accent);
    color: #fff;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 5px 20px rgba(255, 107, 107, 0.4);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 107, 107, 0.6);
}

/* 章节标题 */
.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 600px;
    margin: 20px auto 0;
}

/* 内容区块 */
.content-section {
    padding: 60px 0;
}

.content-section:nth-child(even) {
    background: rgba(45, 27, 78, 0.5);
}

/* 视频卡片网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.video-card {
    background: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255, 143, 171, 0.2);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.3);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.1);
}

.play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 107, 107, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-card:hover .play-overlay {
    opacity: 1;
}

.play-overlay::after {
    content: '';
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff;
    margin-left: 4px;
}

.video-info {
    padding: 20px;
}

.video-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.video-rating {
    color: var(--accent-gold);
}

/* 作者信息卡片 */
.author-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    border: 1px solid rgba(255, 143, 171, 0.2);
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-coral);
}

.author-info h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.author-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 评论区 */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.review-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    border: 1px solid rgba(255, 143, 171, 0.2);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.reviewer-name {
    font-weight: 600;
}

.reviewer-location {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.review-stars {
    color: var(--accent-gold);
    font-size: 1.1rem;
}

.review-content {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 10px;
}

.review-date {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* FAQ区域 */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 15px;
    overflow: hidden;
    border: 1px solid rgba(255, 143, 171, 0.2);
}

.faq-question {
    padding: 20px 25px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: rgba(255, 107, 107, 0.1);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent-coral);
}

.faq-answer {
    padding: 0 25px 20px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* 支付方式 */
.payment-section {
    text-align: center;
}

.payment-icons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.payment-icons img {
    height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

/* 关于我们 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-text {
    line-height: 2;
}

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-coral);
}

.about-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* 国际合作 */
.collab-section {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(255, 143, 171, 0.1));
    border-radius: 20px;
    padding: 40px;
    margin: 40px 0;
}

.collab-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
}

.collab-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.collab-image img {
    width: 100%;
    border-radius: 15px;
}

/* 授权徽章 */
.license-section {
    text-align: center;
    padding: 40px;
    background: var(--card-bg);
    border-radius: 20px;
    margin: 40px 0;
}

.license-badge {
    max-width: 300px;
    margin: 20px auto;
}

.license-badge img {
    width: 100%;
    border-radius: 10px;
}

/* 页脚 */
.site-footer {
    background: rgba(26, 10, 46, 0.98);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 107, 107, 0.3);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--accent-coral);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--accent-coral);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.age-badge {
    display: inline-block;
    background: var(--accent-coral);
    color: #fff;
    padding: 5px 15px;
    border-radius: 5px;
    font-weight: 700;
    margin-top: 15px;
}

/* 社交媒体链接 */
.social-links {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 107, 107, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-coral);
    text-decoration: none;
    transition: background 0.3s ease;
}

.social-links a:hover {
    background: var(--accent-coral);
    color: #fff;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 15px 0;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--accent-coral);
}

.breadcrumb span {
    color: var(--text-muted);
    margin: 0 10px;
}

/* 视频播放器 */
.video-player-wrap {
    position: relative;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 30px;
}

.video-player-wrap video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.video-player-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a0a2e, #2d1b4e);
}

.video-player-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
}

/* 内容文章样式 */
.article-content {
    max-width: 900px;
    margin: 0 auto;
}

.article-content h2 {
    font-size: 1.8rem;
    margin: 40px 0 20px;
    color: var(--accent-coral);
}

.article-content h3 {
    font-size: 1.4rem;
    margin: 30px 0 15px;
}

.article-content p {
    margin-bottom: 20px;
    line-height: 2;
}

.article-content ul,
.article-content ol {
    margin: 20px 0 20px 30px;
}

.article-content li {
    margin-bottom: 10px;
    line-height: 1.8;
}

/* 下载页面 */
.download-hero {
    text-align: center;
    padding: 80px 15px;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.2), rgba(255, 143, 171, 0.1));
}

.app-mockup {
    max-width: 300px;
    margin: 30px auto;
}

.app-mockup img {
    width: 100%;
    border-radius: 30px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--card-bg);
    padding: 15px 30px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255, 143, 171, 0.3);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.3);
}

.download-btn .icon {
    font-size: 1.5rem;
}

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

.download-btn .text small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.download-btn .text strong {
    font-size: 1.1rem;
}

/* 特性列表 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    border: 1px solid rgba(255, 143, 171, 0.2);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.5rem;
}

.feature-card h4 {
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content,
    .collab-content {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        background: rgba(26, 10, 46, 0.98);
        position: absolute;
        top: 100%;
        left: 0;
        padding: 20px;
        border-top: 1px solid rgba(255, 107, 107, 0.3);
    }
    
    .main-nav.active {
        display: flex;
    }
    
    .nav-link {
        padding: 12px 20px;
        border-radius: 8px;
    }
    
    .header-inner {
        position: relative;
    }
    
    .hero-section {
        min-height: 400px;
        padding: 40px 15px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 15px;
    }
    
    .review-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .content-section {
        padding: 40px 0;
    }
}

@media (max-width: 480px) {
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

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

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* 懒加载图片占位 */
img[loading="lazy"] {
    background: linear-gradient(135deg, #2d1b4e, #3d2a5f);
}

/* 无障碍优化 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 打印样式 */
@media print {
    .site-header,
    .site-footer,
    .cta-btn {
        display: none;
    }
    
    body {
        background: #fff;
        color: #000;
    }
}