/* 
 * 小欣奈传媒 - 原创CSS样式表
 * 颜色主题：校园粉（#ff69b4）、青春蓝（#87cefa）、纯洁白（#ffffff）、深邃灰（#333333）
 */

:root {
    --primary-color: #ff69b4;
    --secondary-color: #87cefa;
    --text-main: #333333;
    --text-light: #666666;
    --bg-main: #ffffff;
    --bg-light: #fff0f5;
    --border-color: #eeeeee;
    --shadow: 0 4px 12px rgba(255, 105, 180, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: var(--text-main);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-color);
}

ul {
    list-style: none;
}

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

/* Header & Nav */
.header {
    background: var(--bg-main);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo {
    height: 50px;
    width: auto;
}

.nav-favicon {
    height: 32px;
    width: 32px;
    border-radius: 50%;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu li a {
    font-size: 16px;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-menu li a:hover::after,
.nav-menu li a.active::after {
    width: 100%;
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-main);
    box-shadow: var(--shadow);
    border-radius: 8px;
    padding: 10px 0;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 101;
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    top: calc(100% + 5px);
}

.nav-dropdown-menu li {
    padding: 0;
}

.nav-dropdown-menu a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    white-space: nowrap;
}

.nav-dropdown-menu a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

/* Search Box */
.search-container {
    background: var(--bg-light);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-main);
    border-radius: 30px;
    overflow: hidden;
    border: 1px solid var(--primary-color);
}

.search-input {
    flex: 1;
    border: none;
    padding: 12px 20px;
    font-size: 14px;
    outline: none;
}

.search-btn {
    background: var(--primary-color);
    color: #fff;
    border: none;
    padding: 0 30px;
    cursor: pointer;
    font-weight: bold;
    transition: var(--transition);
}

.search-btn:hover {
    background: #ff1493;
}

/* Hero Banner */
.hero-banner {
    height: 500px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.2) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    color: #fff;
    max-width: 600px;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-desc {
    font-size: 18px;
    line-height: 1.8;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

/* Sections */
.section {
    padding: 80px 0;
}

.z3kyi7az {
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    position: relative;
    color: var(--primary-color);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 2px;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.video-card {
    background: var(--bg-main);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(255, 105, 180, 0.2);
}

.video-thumb {
    position: relative;
    padding-top: 56.25%; /* 16:9 */
    overflow: hidden;
}

.video-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.05);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition);
}

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

.play-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    font-size: 24px;
    padding-left: 5px;
}

.video-info {
    padding: 20px;
}

.video-title {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-light);
    font-size: 13px;
    margin-bottom: 10px;
}

.video-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: var(--bg-light);
    color: var(--primary-color);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}

/* Experts */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.expert-card {
    background: var(--bg-main);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.expert-card:hover {
    transform: translateY(-5px);
}

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    object-fit: cover;
    border: 4px solid var(--bg-light);
}

.expert-name {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 5px;
}

.expert-title {
    color: var(--primary-color);
    font-size: 14px;
    margin-bottom: 15px;
}

.expert-desc {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}

.expert-btn {
    display: inline-block;
    padding: 8px 20px;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    transition: var(--transition);
}

.expert-btn:hover {
    background: var(--primary-color);
    color: #fff;
}

/* Reviews */
.e58qbqv {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.review-card {
    background: var(--bg-light);
    padding: 30px;
    border-radius: 12px;
    position: relative;
}

.review-stars {
    color: #ffd700;
    margin-bottom: 15px;
    font-size: 18px;
}

.review-text {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 20px;
    font-style: italic;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    font-size: 20px;
}

.author-info h4 {
    font-size: 16px;
    margin-bottom: 2px;
}

.author-info p {
    font-size: 12px;
    color: var(--text-light);
}

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

.faq-item {
    background: var(--bg-main);
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    overflow: hidden;
}

.faq-q {
    padding: 20px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-q:hover {
    color: var(--primary-color);
}

.faq-icon {
    font-size: 20px;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-a {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--text-light);
    line-height: 1.8;
}

.faq-item.active .faq-a {
    padding: 0 20px 20px;
    max-height: 500px;
}

/* Footer */
.footer {
    background: var(--text-main);
    color: #fff;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.f1kxm2 {
    height: 40px;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.swfvebp {
    color: #aaa;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.footer-links a {
    color: #aaa;
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.xldkd6 li {
    color: #aaa;
    font-size: 14px;
    margin-bottom: 10px;
    display: flex;
    gap: 10px;
}

.fgtq5w {
    display: flex;
    gap: 20px;
}

.dx3r7v {
    text-align: center;
}

.tekwhx {
    width: 100px;
    height: 100px;
    background: #fff;
    padding: 5px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.tekwhx img {
    width: 100%;
    height: 100%;
}

.dx3r7v p {
    font-size: 12px;
    color: #aaa;
}

.chn2zcm8 {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.chn2zcm8 a {
    display: inline-block;
    padding: 4px 10px;
    border: 1px solid #555;
    color: #aaa;
    font-size: 12px;
    border-radius: 4px;
}

.chn2zcm8 a:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    text-align: center;
    color: #888;
    font-size: 14px;
}

/* Mobile Menu */
.nav-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--primary-color);
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: #ff1493;
    transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--bg-main);
        flex-direction: column;
        gap: 0;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .nav-menu.active {
        max-height: 500px;
    }
    
    .nav-menu li {
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu li a {
        display: block;
        padding: 15px 20px;
    }
    
    .nav-dropdown-menu {
        position: static;
        transform: none;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        display: none;
        background: var(--bg-light);
        border-radius: 0;
    }
    
    .nav-dropdown.active .nav-dropdown-menu {
        display: block;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .search-box {
        margin: 0 20px;
    }
}