/* 铁粉空间 - 外部样式表 */
/* 品牌：铁粉空间 | 域名：life-fun.cn */

/* ========== 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", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

.section {
    padding: 60px 0;
}

/* ========== 头部导航 ========== */
.header {
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
}

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

.nav-menu a {
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: rgba(255,255,255,0.2);
}

/* ========== 搜索框 ========== */
.search-bar {
    background: #f8f9fa;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
}

.search-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.search-input {
    width: 500px;
    max-width: 100%;
    padding: 12px 20px;
    border: 2px solid #FF6B9D;
    border-radius: 25px;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: #FF8A65;
    box-shadow: 0 0 10px rgba(255,107,157,0.3);
}

.search-btn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    color: #fff;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255,107,157,0.4);
}

/* ========== Hero区域 ========== */
.hero {
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 50%, #FFB347 100%);
    padding: 80px 0;
    color: #fff;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 30px;
    opacity: 0.95;
}

.hero-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 35px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: #fff;
    color: #FF6B9D;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-outline:hover {
    background: #fff;
    color: #FF6B9D;
}

/* ========== 视频卡片 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.video-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

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

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255,107,157,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.video-card:hover .play-btn {
    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: 12px;
}

.video-info {
    padding: 15px;
}

.video-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 13px;
    color: #888;
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ========== 模块标题 ========== */
.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 32px;
    color: #333;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 16px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.section-header .highlight {
    color: #FF6B9D;
    font-weight: 600;
}

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

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255,107,157,0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 30px;
    color: #fff;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #333;
}

.feature-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
}

/* ========== 专家展示 ========== */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.expert-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.expert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255,107,157,0.15);
}

.expert-avatar {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.expert-info {
    padding: 20px;
    text-align: center;
}

.expert-name {
    font-size: 20px;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.expert-title {
    font-size: 14px;
    color: #FF6B9D;
    margin-bottom: 10px;
}

.expert-desc {
    font-size: 13px;
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

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

.expert-btn {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    border: 1px solid #FF6B9D;
    color: #FF6B9D;
    transition: all 0.3s ease;
}

.expert-btn:hover {
    background: #FF6B9D;
    color: #fff;
}

/* ========== 用户评价 ========== */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
}

.review-card {
    background: #fff;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

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

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.review-user {
    flex: 1;
}

.review-name {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.review-date {
    font-size: 12px;
    color: #999;
}

.review-stars {
    color: #FFB347;
    font-size: 14px;
}

.review-content {
    font-size: 14px;
    color: #555;
    line-height: 1.7;
}

/* ========== 合作品牌 ========== */
.partner-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    align-items: center;
}

.partner-logo {
    height: 50px;
    opacity: 0.6;
    filter: grayscale(100%);
    transition: all 0.3s ease;
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* ========== 联系信息 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.contact-card {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.contact-card h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #FF6B9D;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 15px;
    font-size: 14px;
    color: #555;
}

.contact-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 12px;
    flex-shrink: 0;
}

/* ========== 二维码 ========== */
.qrcode-grid {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

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

.qrcode-item img {
    width: 150px;
    height: 150px;
    border-radius: 10px;
    margin-bottom: 10px;
}

.qrcode-item p {
    font-size: 14px;
    color: #666;
}

/* ========== 页脚 ========== */
.footer {
    background: #2d2d2d;
    color: #fff;
    padding: 50px 0 20px;
}

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

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #FF6B9D;
}

.footer-col a {
    display: block;
    color: #aaa;
    font-size: 14px;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: #FF6B9D;
}

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

.footer-bottom .update-time {
    margin-top: 10px;
    font-size: 12px;
    color: #666;
}

/* ========== 社交分享 ========== */
.social-share {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.social-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    transition: all 0.3s ease;
}

.social-btn:hover {
    transform: translateY(-3px);
}

.social-wechat { background: #07C160; }
.social-weibo { background: #E6162D; }
.social-douyin { background: #000; }
.social-bilibili { background: #00A1D6; }

/* ========== 面包屑 ========== */
.breadcrumb {
    padding: 15px 0;
    background: #f8f9fa;
    font-size: 14px;
}

.breadcrumb a {
    color: #666;
}

.breadcrumb a:hover {
    color: #FF6B9D;
}

.breadcrumb span {
    color: #999;
    margin: 0 8px;
}

.breadcrumb .current {
    color: #FF6B9D;
}

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

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

.faq-question {
    padding: 20px;
    font-size: 16px;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: #f8f9fa;
}

.faq-answer {
    padding: 0 20px 20px;
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* ========== 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: 10px;
    }
    
    .nav-menu a {
        padding: 6px 12px;
        font-size: 14px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .search-input {
        width: 100%;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    .section-header h2 {
        font-size: 24px;
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .review-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .hero {
        padding: 50px 0;
    }
    
    .hero h1 {
        font-size: 24px;
    }
    
    .btn {
        padding: 12px 25px;
        font-size: 14px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

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

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

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

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

/* ========== 工具提示 ========== */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: #fff;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* ========== 标签 ========== */
.tag {
    display: inline-block;
    padding: 4px 12px;
    background: #f0f0f0;
    color: #666;
    border-radius: 15px;
    font-size: 12px;
    margin-right: 8px;
    margin-bottom: 8px;
}

.tag-video {
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    color: #fff;
}

/* ========== 统计数据 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 30px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #FF6B9D;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: #666;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========== 内页样式 ========== */
.page-header {
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    padding: 60px 0;
    color: #fff;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 16px;
    opacity: 0.9;
}

.page-content {
    padding: 50px 0;
}

/* ========== 工具卡片 ========== */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.tool-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255,107,157,0.15);
}

.tool-image {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.tool-info {
    padding: 20px;
}

.tool-name {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.tool-desc {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

.tool-btn {
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    color: #fff;
    border-radius: 25px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.tool-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255,107,157,0.4);
}

/* ========== 社区话题 ========== */
.topic-list {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.topic-item {
    padding: 20px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: background 0.3s ease;
}

.topic-item:hover {
    background: #f8f9fa;
}

.topic-item:last-child {
    border-bottom: none;
}

.topic-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.topic-content {
    flex: 1;
}

.topic-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.topic-meta {
    font-size: 13px;
    color: #999;
}

.topic-stats {
    text-align: right;
    font-size: 13px;
    color: #666;
}

/* ========== 背景装饰 ========== */
.bg-light {
    background: #f8f9fa;
}

.bg-gradient {
    background: linear-gradient(135deg, #fff5f8 0%, #fff9f5 100%);
}