/* ====================================
   高清无码 - 原创主题样式表
   Brand: 高清无码 | Domain: eruLxre.cn
   百度SEO EEAT最佳实践 | 全站中文
   ==================================== */

/* ====================================
   CSS变量 - 原创配色方案
   主色：绿色 #4cb050 | 辅色：深绿 #2e7d32
   背景：浅绿 #f1f8e9
   ==================================== */
:root {
    --primary:        #4cb050;
    --primary-light:  #81c784;
    --primary-dark:   #2e7d32;
    --secondary:      #558b2f;
    --secondary-light:#9ccc65;
    --accent:         #ff6f00;
    --accent-light:   #ffa726;
    --bg-dark:        #f1f8e9;
    --bg-medium:      #c8e6c9;
    --bg-card:        #e8f5e9;
    --text-dark:      #1b5e20;
    --text-light:     #2e7d32;
    --text-muted:     #558b2f;
    --border-color:   #81c784;
    --gradient-main:  linear-gradient(135deg, #4cb050 0%, #558b2f 50%, #2e7d32 100%);
    --gradient-card:  linear-gradient(145deg, #e8f5e9 0%, #c8e6c9 100%);
    --gradient-hero:  linear-gradient(135deg, rgba(241,248,233,0.92) 0%, rgba(76,176,80,0.65) 100%);
    --shadow-card:    0 8px 32px rgba(76,176,80,0.2);
    --shadow-hover:   0 16px 48px rgba(76,176,80,0.4);
    --radius-sm:      8px;
    --radius-md:      16px;
    --radius-lg:      24px;
    --transition:     all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'WenQuanYi Micro Hei', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover { color: var(--accent-light); }

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

ul { list-style: none; }

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 无障碍隐藏 */
.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: #ffffff;
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(76,176,80,0.1);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.logo-container a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: inherit;
}

.nav-favicon {
    width: 32px;
    height: 32px;
}

.logo-img {
    height: 42px;
    width: auto;
}

.main-nav {
    flex: 1;
    margin: 0 20px;
}

.main-nav ul {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.main-nav a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 4px;
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* 搜索栏 */
.search-bar-container {
    background: var(--bg-card);
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
}

.search-box {
    display: flex;
    gap: 8px;
}

.search-input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #ffffff;
    color: var(--text-dark);
    font-size: 14px;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    padding: 10px 24px;
    background: var(--primary);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-dark);
}

/* 面包屑 */
.breadcrumb-nav {
    background: var(--bg-card);
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bc-sep {
    color: var(--text-muted);
}

/* ====================================
   Hero 首屏
   ==================================== */
.hero-section {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #4cb050 0%, #81c784 100%);
    color: #ffffff;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('/assets/images/hero_banner.jpg') center/cover;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(76,176,80,0.6);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.1rem;
    max-width: 640px;
    margin: 0 auto 24px;
    opacity: 0.95;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.btn-primary, .btn-outline {
    padding: 12px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background: #ffffff;
    color: var(--primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

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

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

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

.stat-num {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-label {
    display: block;
    font-size: 14px;
    opacity: 0.9;
}

/* ====================================
   通用Section
   ==================================== */
.section {
    padding: 60px 0;
}

.section-alt {
    background: var(--bg-card);
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    background: var(--bg-card);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.section-title span {
    color: var(--primary);
}

.section-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ====================================
   视频卡片
   ==================================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.video-card {
    background: #ffffff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.video-thumb-wrap {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #f0f0f0;
}

.video-thumb-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.play-btn-icon {
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.play-btn-icon::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 15px solid var(--primary);
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    margin-left: 4px;
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: #ffffff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.video-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--primary);
    color: #ffffff;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.video-author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.author-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.author-name {
    font-size: 12px;
    color: var(--text-muted);
}

/* ====================================
   模块卡片
   ==================================== */
.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.module-card {
    background: #ffffff;
    padding: 32px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.module-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.module-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.module-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.module-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ====================================
   专家卡片
   ==================================== */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}

.expert-card {
    background: #ffffff;
    padding: 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.expert-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.expert-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 32px;
    margin: 0 auto 16px;
}

.expert-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.expert-title {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 12px;
}

.expert-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.6;
}

.expert-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 16px;
}

.expert-tag {
    background: var(--bg-card);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.expert-btns {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.btn-sm {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-sm-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-sm-primary:hover {
    background: var(--primary-dark);
}

.btn-sm-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-sm-outline:hover {
    background: var(--bg-card);
}

/* ====================================
   评论卡片
   ==================================== */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.review-card {
    background: #ffffff;
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.review-card:hover {
    box-shadow: var(--shadow-hover);
}

.review-stars {
    color: #ffc107;
    font-size: 16px;
    margin-bottom: 12px;
}

.review-text {
    font-size: 14px;
    color: var(--text-dark);
    line-height: 1.6;
    margin-bottom: 16px;
}

.reviewer {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.reviewer-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.reviewer-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.reviewer-date {
    font-size: 12px;
    color: var(--text-muted);
}

/* ====================================
   FAQ
   ==================================== */
.faq-grid {
    display: grid;
    gap: 16px;
}

.faq-item {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    padding: 16px;
    background: var(--bg-card);
    cursor: pointer;
    font-weight: 600;
    color: var(--text-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--border-color);
}

.faq-question::after {
    content: '▼';
    font-size: 12px;
    transition: var(--transition);
}

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

.faq-answer {
    padding: 16px;
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.6;
    display: none;
}

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

/* ====================================
   合作品牌墙
   ==================================== */
.partner-wall {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.partner-item {
    background: #ffffff;
    padding: 24px;
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--text-muted);
    font-weight: 600;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.partner-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    color: var(--primary);
}

/* ====================================
   加入步骤
   ==================================== */
.join-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.step-item {
    background: #ffffff;
    padding: 32px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.step-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.step-num {
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    margin: 0 auto 16px;
}

.step-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.step-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ====================================
   二维码区域
   ==================================== */
.qrcode-section {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

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

.qrcode-box img {
    width: 100px;
    height: 100px;
    margin-bottom: 12px;
    border-radius: var(--radius-sm);
}

.qrcode-box p {
    font-size: 12px;
    color: var(--text-muted);
}

/* ====================================
   社交分享
   ==================================== */
.social-share {
    display: flex;
    align-items: center;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 24px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin: 24px 0;
}

.share-btn {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    border: 1px solid var(--border-color);
    color: var(--text-dark);
}

.share-btn:hover {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* ====================================
   页脚
   ==================================== */
.site-footer {
    background: #ffffff;
    border-top: 2px solid var(--border-color);
    padding: 40px 0 20px;
    font-size: 14px;
    color: var(--text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.footer-col h3 {
    color: var(--text-dark);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-logo {
    height: 42px;
    width: auto;
    margin-bottom: 16px;
}

.company-desc {
    margin-bottom: 16px;
    line-height: 1.6;
}

.contact-info p {
    margin-bottom: 8px;
    line-height: 1.6;
}

.quick-links ul,
.footer-tags {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-tag {
    display: inline-block;
    padding: 6px 12px;
    background: var(--bg-card);
    color: var(--primary);
    border-radius: 4px;
    font-size: 12px;
    transition: var(--transition);
}

.footer-tag:hover {
    background: var(--primary);
    color: #ffffff;
}

.copyright {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
}

.update-time {
    margin: 8px 0;
    color: var(--primary);
    font-weight: 600;
}

/* ====================================
   页面横幅
   ==================================== */
.page-banner {
    background: linear-gradient(135deg, #4cb050 0%, #81c784 100%);
    color: #ffffff;
    padding: 60px 20px;
    text-align: center;
    margin-bottom: 40px;
}

.page-banner h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.page-banner p {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
}

/* ====================================
   动画效果
   ==================================== */
.animate-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ====================================
   响应式设计
   ==================================== */
@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        margin: 0;
        order: 3;
    }
    
    .main-nav.open {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav a {
        display: block;
        padding: 12px 16px;
        border-radius: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .social-share {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .module-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .btn-primary, .btn-outline {
        width: 100%;
    }
}