/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #2563eb;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 语言切换器 */
.language-switcher {
    display: flex;
    gap: 0.5rem;
    margin-left: 2rem;
}

.lang-btn {
    padding: 6px 12px;
    border: 1px solid #d1d5db;
    background: white;
    color: #6b7280;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    border-color: #2563eb;
    color: #2563eb;
}

.lang-btn.active {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
}

/* 主页横幅 */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
    min-height: 80vh;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 0.5rem;
}

.hero-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #2563eb;
}

.hero-image {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    height: 100%;
    min-height: 400px;
}

.floating-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 1.5rem;
    text-align: center;
    color: white;
    animation: float 6s ease-in-out infinite;
    width: 100%;
    max-width: 280px;
    flex-shrink: 0;
}

.floating-card i {
    font-size: 2.5rem;
    margin-bottom: 0.8rem;
}

.floating-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.4rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* 章节标题 */
.section-header {
    text-align: left;
    margin-bottom: 0;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1rem;
    line-height: 1.2;
    white-space: pre-line;
}

.section-header p {
    font-size: 1.1rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/* 市场分析部分 */
.market-section {
    padding: 6rem 0;
    background: #f8fafc;
}

.market-section .section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.market-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.market-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.market-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.card-icon i {
    font-size: 1.5rem;
    color: white;
}

.market-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
    text-align: center;
}

.stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: #2563eb;
}

.stat-label {
    font-size: 0.9rem;
    color: #6b7280;
    margin-top: 0.25rem;
}

.user-demographics {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.demographic-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.demographic-item ul {
    list-style: none;
    padding-left: 0;
}

.demographic-item li {
    padding: 0.25rem 0;
    color: #6b7280;
    position: relative;
    padding-left: 1.5rem;
}

.demographic-item li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* 关于我们部分 */
.about-section {
    padding: 6rem 0;
    background: white;
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

.about-content {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1.5rem;
}

.about-text p {
    font-size: 1.1rem;
    color: #6b7280;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.vision-box {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border: 1px solid #bae6fd;
    border-radius: 12px;
    padding: 2rem;
}

.vision-box h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #0369a1;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.vision-box p {
    color: #0c4a6e;
    margin-bottom: 0;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stats-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    border: 1px solid #e5e7eb;
}

.stats-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.stat-icon i {
    font-size: 1.5rem;
    color: white;
}

.stats-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.stats-card p {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.5;
}

.media-reach-section-full {
    padding: 6rem 0;
    background: #f8fafc;
}

.media-reach-section-full .section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.media-reach-section {
    background: #f8fafc;
    border-radius: 16px;
    padding: 3rem 2rem;
    margin-top: 2rem;
}

.media-reach-section h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
    text-align: center;
}

.media-reach-section > p {
    color: #6b7280;
    text-align: center;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.media-platforms {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.platform-card {
    background: white;
    border-radius: 50%;
    padding: 1rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
    transform: translateY(20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 180px;
    height: 180px;
    min-width: 180px;
    min-height: 180px;
    max-width: 180px;
    max-height: 180px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

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

.platform-card:nth-child(1) { animation-delay: 0.1s; }
.platform-card:nth-child(2) { animation-delay: 0.2s; }
.platform-card:nth-child(3) { animation-delay: 0.3s; }
.platform-card:nth-child(4) { animation-delay: 0.4s; }

.platform-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    text-decoration: none;
    color: inherit;
}

.platform-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.platform-avatar {
    flex-shrink: 0;
}

.avatar-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    border: 3px solid #e5e7eb;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    margin-bottom: 0.75rem;
    flex-shrink: 0;
}

.platform-card:hover .avatar-img {
    border-color: #2563eb;
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.2);
}

.platform-info {
    padding: 0 0.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 0;
}

.platform-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.75rem;
    text-align: center;
    line-height: 1.2;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.platform-stats {
    font-size: 0.75rem;
    font-weight: 500;
    color: #2563eb;
    text-align: center;
    line-height: 1.2;
}



.media-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e5e7eb;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-align: center;
    justify-content: center;
}

.highlight-item i {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.highlight-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.25rem;
}

.highlight-item p {
    font-size: 0.9rem;
    color: #6b7280;
    font-weight: 500;
}

/* 服务部分 */
.services-section {
    padding: 6rem 0;
    background: #f8fafc;
}

.services-section .section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.service-icon i {
    font-size: 1.5rem;
    color: white;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
    text-align: center;
}

.service-card p {
    color: #6b7280;
    margin-bottom: 1rem;
}

.service-card ul {
    list-style: none;
    padding-left: 0;
}

.service-card li {
    padding: 0.5rem 0;
    color: #6b7280;
    position: relative;
    padding-left: 1.5rem;
}

.service-card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* 联系我们部分 */
.contact-section {
    padding: 6rem 0;
    background: white;
}

.contact-section .section-header {
    text-align: center;
}

.contact-content {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    text-align: center;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 12px;
    min-width: 300px;
}

.contact-item i {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.contact-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
    text-align: center;
}

.contact-item p {
    color: #6b7280;
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.contact-item small {
    color: #9ca3af;
    text-align: center;
    font-size: 0.9rem;
    font-style: italic;
}

.contact-form {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 16px;
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* 页脚 */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 4rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
    text-align: center;
}

.footer-section p,
.footer-section li {
    color: #d1d5db;
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #2563eb;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #374151;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.social-links a:hover {
    background: #2563eb;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .language-switcher {
        margin-left: 1rem;
    }
    
    .lang-btn {
        padding: 4px 8px;
        font-size: 0.8rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-image {
        margin-top: 2rem;
        min-height: 300px;
        gap: 1rem;
    }
    
    .about-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .section-header {
        text-align: center;
    }

    .market-section .section-header,
    .media-reach-section-full .section-header,
    .services-section .section-header,
    .contact-section .section-header {
        text-align: center;
    }

    .about-content {
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        text-align: center;
    }

    .footer-section h3,
    .footer-section h4 {
        text-align: center;
    }

    .section-header h2 {
        font-size: 2rem;
        line-height: 1.2;
        white-space: pre-line;
    }
    
    .market-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .card-icon {
        margin: 0 auto 1.5rem;
    }

    .market-card h3 {
        text-align: center;
    }

    .service-icon {
        margin: 0 auto 1.5rem;
    }

    .service-card h3 {
        text-align: center;
    }

    .media-platforms {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        max-width: 300px;
    }

    .platform-card {
        width: 120px;
        height: 120px;
        min-width: 120px;
        min-height: 120px;
        max-width: 120px;
        max-height: 120px;
        padding: 0.6rem;
        text-decoration: none;
        color: inherit;
        cursor: pointer;
    }

    .avatar-img {
        width: 50px;
        height: 50px;
        border-width: 2px;
        margin-bottom: 0.6rem;
    }

    .platform-info h4 {
        font-size: 0.85rem;
        margin-bottom: 0.6rem;
    }

    .platform-stats {
        font-size: 0.7rem;
    }

    .platform-card:hover,
    .platform-card:active {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        text-decoration: none;
        color: inherit;
    }
    
    .media-highlights {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .highlight-item {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-image {
        margin-top: 1.5rem;
        min-height: 250px;
        gap: 0.8rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
        line-height: 1.2;
        white-space: pre-line;
    }

    .market-section .section-header,
    .media-reach-section-full .section-header,
    .services-section .section-header,
    .contact-section .section-header {
        text-align: center;
    }

    .card-icon {
        margin: 0 auto 1.5rem;
    }

    .market-card h3 {
        text-align: center;
    }

    .service-icon {
        margin: 0 auto 1.5rem;
    }

    .service-card h3 {
        text-align: center;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        text-align: center;
    }

    .footer-section h3,
    .footer-section h4 {
        text-align: center;
    }

    .container {
        padding: 0 15px;
    }
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}