/**
 * 糖心vlog - ikmtw.com 原创样式
 * 版本: 1.0.0
 * 设计风格: 现代简约粉色渐变
 */

/* ========== 基础重置 ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #fff5f8 0%, #ffeef3 50%, #fff0f5 100%);
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

ul, ol {
    list-style: none;
}

/* ========== 容器布局 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 60px 0;
}

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

.section-title h2 {
    font-size: 2rem;
    color: #e75a7c;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #ff9a9e, #fecfef);
    border-radius: 2px;
}

.section-title p {
    color: #888;
    font-size: 1rem;
    margin-top: 15px;
}

/* ========== 头部导航 ========== */
.header {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #ffecd2 100%);
    box-shadow: 0 2px 20px rgba(231, 90, 124, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

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

.nav-menu a {
    color: #fff;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: all 0.3s ease;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #fff;
    transition: width 0.3s ease;
}

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

/* ========== 搜索框 ========== */
.search-bar {
    background: rgba(255,255,255,0.95);
    padding: 20px 0;
    border-bottom: 1px solid rgba(231, 90, 124, 0.1);
}

.search-wrapper {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 15px 50px 15px 20px;
    border: 2px solid #fecfef;
    border-radius: 30px;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: #e75a7c;
    box-shadow: 0 0 15px rgba(231, 90, 124, 0.2);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(135deg, #ff9a9e, #fecfef);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

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

.search-btn svg {
    width: 18px;
    height: 18px;
    fill: #fff;
}

/* ========== 英雄区域 ========== */
.hero {
    position: relative;
    height: 500px;
    overflow: hidden;
}

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

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,154,158,0.7) 0%, rgba(254,207,239,0.5) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.25rem;
    max-width: 600px;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.hero-btn {
    display: inline-block;
    padding: 15px 40px;
    background: #fff;
    color: #e75a7c;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

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

.video-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(231, 90, 124, 0.1);
    transition: all 0.3s ease;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(231, 90, 124, 0.2);
}

.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(1.08);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 60px;
    height: 60px;
    background: rgba(231, 90, 124, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0;
}

.video-card:hover .play-btn {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid #fff;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 5px;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.video-info {
    padding: 18px;
}

.video-info h3 {
    font-size: 1rem;
    color: #333;
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    color: #999;
    font-size: 0.85rem;
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* ========== 特色模块 ========== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 35px 25px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(231, 90, 124, 0.08);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(231, 90, 124, 0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #ff9a9e, #fecfef);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.2rem;
    color: #e75a7c;
    margin-bottom: 12px;
}

.feature-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========== 专家团队 ========== */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.expert-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(231, 90, 124, 0.1);
    transition: all 0.3s ease;
}

.expert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(231, 90, 124, 0.2);
}

.expert-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 25px auto 15px;
    background: linear-gradient(135deg, #ff9a9e, #fecfef);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
}

.expert-info {
    padding: 0 25px 25px;
    text-align: center;
}

.expert-info h3 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 5px;
}

.expert-title {
    color: #e75a7c;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.expert-desc {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.expert-btn {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, #ff9a9e, #fecfef);
    color: #fff;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.expert-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(231, 90, 124, 0.3);
}

/* ========== 用户评价 ========== */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.review-card {
    background: #fff;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(231, 90, 124, 0.08);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff9a9e, #fecfef);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
}

.review-name {
    font-weight: 600;
    color: #333;
}

.review-rating {
    color: #ffc107;
    font-size: 0.9rem;
}

.review-text {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========== 合作伙伴 ========== */
.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    align-items: center;
}

.partner-logo {
    padding: 20px 30px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 15px rgba(231, 90, 124, 0.08);
    transition: all 0.3s ease;
}

.partner-logo:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(231, 90, 124, 0.15);
}

/* ========== 页脚 ========== */
.footer {
    background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
    color: #fff;
    padding: 60px 0 30px;
}

.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: #ff9a9e;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: #aaa;
    transition: color 0.3s ease;
}

.footer-col ul li a:hover {
    color: #ff9a9e;
}

.footer-contact p {
    color: #aaa;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.footer-qrcode {
    display: flex;
    gap: 20px;
    margin-top: 15px;
}

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

.qrcode-item img {
    width: 80px;
    height: 80px;
    background: #fff;
    padding: 5px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.qrcode-item span {
    font-size: 0.8rem;
    color: #aaa;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 25px;
    text-align: center;
    color: #888;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: #ff9a9e;
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
    padding: 15px 0;
    background: rgba(255,255,255,0.8);
    border-bottom: 1px solid rgba(231, 90, 124, 0.1);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.breadcrumb-list a {
    color: #e75a7c;
}

.breadcrumb-list span {
    color: #999;
}

/* ========== 内容页面 ========== */
.page-header {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #ffecd2 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.content-section {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    margin: 30px 0;
    box-shadow: 0 5px 20px rgba(231, 90, 124, 0.08);
}

.content-section h2 {
    color: #e75a7c;
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #fecfef;
}

.content-section p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 15px;
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .hero {
        height: 400px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
        padding: 0 20px;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .section-title h2 {
        font-size: 1.5rem;
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-qrcode {
        justify-content: center;
    }
    
    .content-section {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .hero {
        height: 350px;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-pink { color: #e75a7c; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.hidden { display: none; }

/* ========== 动画效果 ========== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* ========== 懒加载占位 ========== */
.lazy-placeholder {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}