/* 糖心vlog - 原创品牌主题样式表 */
:root {
    --primary-color: #FF6B6B;
    --secondary-color: #FF9F43;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #F8F9FA;
    --white: #FFFFFF;
    --border-color: #EEEEEE;
    --transition: all 0.3s ease;
}

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 头部导航 */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

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

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

.logo img {
    height: 50px;
}

.logo span {
    font-size: 24px;
    font-weight: bold;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav ul {
    display: flex;
    gap: 30px;
}

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

nav a:hover, nav a.active {
    color: var(--primary-color);
}

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

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

/* 搜索框 */
.search-bar {
    background-color: var(--bg-light);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    display: none;
}

.search-bar.active {
    display: block;
}

.search-inner {
    display: flex;
    justify-content: center;
}

.search-input {
    width: 60%;
    padding: 12px 20px;
    border: 1px solid var(--border-color);
    border-radius: 30px 0 0 30px;
    outline: none;
    font-size: 16px;
}

.search-btn {
    padding: 12px 30px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    border-radius: 0 30px 30px 0;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
}

/* 英雄横幅 */
.hero {
    position: relative;
    height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    z-index: 1;
}

.hero img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
}

/* 面包屑 */
.breadcrumb {
    padding: 20px 0;
    font-size: 14px;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--text-dark);
}

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

/* 模块通用样式 */
.section {
    padding: 60px 0;
    background-color: var(--white);
}

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

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-title p {
    color: var(--text-light);
    font-size: 16px;
    margin-top: 20px;
}

/* 视频卡片网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.video-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
    position: relative;
}

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

.video-thumb {
    position: relative;
    padding-top: 56.25%; /* 16:9 */
    overflow: hidden;
    background-color: #000;
}

.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);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 107, 107, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 16px;
    border-color: transparent transparent transparent var(--white);
    margin-left: 4px;
}

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

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

.video-info {
    padding: 20px;
}

.video-title {
    font-size: 18px;
    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;
}

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

.expert-card {
    background: var(--white);
    border-radius: 10px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
}

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

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    overflow: hidden;
    border: 3px solid var(--primary-color);
}

.expert-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.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;
}

.expert-links {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.expert-links a {
    padding: 5px 15px;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 13px;
}

.expert-links a:hover {
    background: var(--primary-color);
    color: var(--white);
}

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

.faq-item {
    background: var(--white);
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-question::after {
    content: '-';
    transform: rotate(180deg);
}

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

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

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

.review-card {
    background: var(--white);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    position: relative;
}

.review-card::before {
    content: '"';
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 60px;
    color: var(--bg-light);
    font-family: serif;
    line-height: 1;
}

.review-content {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

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

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
}

.review-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
}

.review-stars {
    color: #FFD700;
    font-size: 14px;
}

/* 底部 */
footer {
    background-color: #222;
    color: #ccc;
    padding: 60px 0 20px;
}

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

.footer-col h3 {
    color: var(--white);
    font-size: 20px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--primary-color);
}

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

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

.footer-contact li {
    display: flex;
    margin-bottom: 15px;
    gap: 10px;
}

.footer-qr {
    display: flex;
    gap: 20px;
}

.qr-item {
    text-align: center;
}

.qr-item img {
    width: 100px;
    height: 100px;
    border-radius: 5px;
    margin-bottom: 10px;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: #333;
    border-radius: 50%;
    color: var(--white);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

/* 响应式 */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        height: auto;
        padding: 15px 0;
        gap: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}