/* =============================================
   小小绘 - 官方外部样式表 (完全原创)
   域名: dataland1.cn
   ============================================= */

/* ---- 全局变量 ---- */
:root {
    --primary: #ff4b82;
    --primary-light: #ff8eaf;
    --primary-dark: #d63060;
    --dark: #222;
    --text: #444;
    --gray: #777;
    --light-gray: #f0f0f0;
    --bg: #f7f8fa;
    --white: #fff;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --radius: 10px;
    --transition: 0.3s ease;
}

/* ---- 重置 ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 15px;
}
a { text-decoration: none; color: inherit; transition: color var(--transition); }
a:hover { color: var(--primary); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; font-family: inherit; }

/* ---- 辅助类 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* =============================================
   头部导航
   ============================================= */
.site-header {
    background: var(--white);
    box-shadow: 0 2px 15px rgba(255,75,130,0.12);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    gap: 20px;
}

/* 品牌Logo区 */
.brand-logo a {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-favicon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    flex-shrink: 0;
}
.nav-logo {
    height: 44px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
}

/* 主导航 */
.main-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}
.main-nav a {
    display: block;
    padding: 7px 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    border-radius: 20px;
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}
.main-nav a:hover,
.main-nav a.active {
    background: var(--primary);
    color: var(--white);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 5px;
    flex-shrink: 0;
}
.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* =============================================
   Hero Banner
   ============================================= */
.hero-section {
    position: relative;
    overflow: hidden;
    max-height: 480px;
}
.hero-banner {
    width: 100%;
    height: 480px;
    object-fit: cover;
    display: block;
}
.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--white);
    background: linear-gradient(135deg, rgba(255,75,130,0.85), rgba(180,0,80,0.75));
    padding: 35px 45px;
    border-radius: 16px;
    width: 90%;
    max-width: 750px;
    backdrop-filter: blur(4px);
}
.hero-content h2 {
    font-size: 30px;
    margin-bottom: 12px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.hero-content p {
    font-size: 16px;
    opacity: 0.95;
    margin-bottom: 5px;
}

/* =============================================
   面包屑
   ============================================= */
.breadcrumb {
    font-size: 13px;
    color: var(--gray);
    margin-bottom: 20px;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}
.breadcrumb a { color: var(--text); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--gray); }

/* =============================================
   视频卡片网格
   ============================================= */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}
.video-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}
.video-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 25px rgba(255,75,130,0.2);
}
.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    background: #111;
    overflow: hidden;
}
.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.88;
    transition: opacity var(--transition), transform var(--transition);
}
.video-card:hover .video-thumb img {
    opacity: 1;
    transform: scale(1.04);
}
.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 46px;
    height: 46px;
    background: rgba(255,75,130,0.85);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), transform var(--transition);
    box-shadow: 0 3px 12px rgba(255,75,130,0.5);
}
.play-icon::after {
    content: '';
    border-style: solid;
    border-width: 9px 0 9px 14px;
    border-color: transparent transparent transparent var(--white);
    margin-left: 5px;
}
.video-card:hover .play-icon {
    background: var(--primary);
    transform: translate(-50%, -50%) scale(1.12);
}
.video-duration {
    position: absolute;
    bottom: 7px;
    right: 8px;
    background: rgba(0,0,0,0.72);
    color: var(--white);
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}
.video-info {
    padding: 14px 16px;
}
.video-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 44px;
    line-height: 1.55;
}
.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--gray);
}
.video-tag {
    color: var(--primary);
    font-weight: 500;
}

/* =============================================
   FAQ
   ============================================= */
.faq-item {
    background: var(--white);
    border-radius: 8px;
    margin-bottom: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}
.faq-q {
    padding: 16px 20px;
    font-weight: 700;
    color: var(--dark);
    cursor: pointer;
    border-left: 4px solid var(--primary);
    background: #fff9fb;
    font-size: 15px;
}
.faq-a {
    padding: 14px 20px;
    font-size: 14px;
    color: var(--text);
    line-height: 1.8;
    border-top: 1px solid #fde;
}

/* =============================================
   底部
   ============================================= */
.site-footer {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #bbb;
    padding: 55px 0 25px;
    margin-top: 60px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 35px;
}
.footer-logo {
    filter: brightness(0) invert(1);
    margin-bottom: 16px;
    max-height: 48px;
    width: auto;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: #999;
}
.footer-title {
    color: var(--white);
    font-size: 17px;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}
.footer-links ul li,
.footer-contact ul li {
    margin-bottom: 10px;
    font-size: 14px;
}
.footer-links a:hover { color: var(--primary); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: #888;
}

/* =============================================
   响应式 - 平板
   ============================================= */
@media (max-width: 1024px) {
    .main-nav a { padding: 6px 10px; font-size: 13px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

/* =============================================
   响应式 - 手机
   ============================================= */
@media (max-width: 768px) {
    .header-inner { flex-wrap: wrap; }
    .main-nav { display: none; width: 100%; order: 3; }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; gap: 0; padding: 10px 0; }
    .main-nav a { border-radius: 0; padding: 12px 20px; border-bottom: 1px solid #f0f0f0; }
    .mobile-menu-toggle { display: flex; }
    .hero-banner { height: 260px; }
    .hero-content { padding: 20px 25px; }
    .hero-content h2 { font-size: 20px; }
    .hero-content p { font-size: 14px; }
    .video-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .footer-grid { grid-template-columns: 1fr; gap: 25px; }
    .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
}
@media (max-width: 480px) {
    .video-grid { grid-template-columns: 1fr; }
    .container { padding: 0 12px; }
}