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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9fafb;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    padding: 15px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #1e3a8a;
    letter-spacing: 1px;
}

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

.nav-links a {
    color: #4b5563;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #3b82f6;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background-color: #3b82f6;
    color: #fff;
    padding: 12px 32px;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3);
}

.btn:hover {
    background-color: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(59, 130, 246, 0.4);
}

.btn-small {
    padding: 8px 24px;
    font-size: 0.95rem;
}

/* 主视觉区 (Hero) 两栏布局 */
.hero {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 80px 0 120px;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-text {
    flex: 1;
    max-width: 550px;
}

.hero-text h1 {
    font-size: 3.5rem;
    color: #1e3a8a;
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: 800;
}

.hero-text p {
    font-size: 1.2rem;
    color: #4b5563;
    margin-bottom: 35px;
}

.hero-visual {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

/* 动态图卡 CSS */
.dynamic-card {
    background: #fff;
    border-radius: 20px;
    padding: 30px;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    transform-style: preserve-3d;
    animation: float 6s ease-in-out infinite;
    position: relative;
    z-index: 2;
    border: 1px solid rgba(255,255,255,0.5);
}

@keyframes float {
    0% { transform: translateY(0px) rotateX(2deg) rotateY(-2deg); }
    50% { transform: translateY(-20px) rotateX(0deg) rotateY(0deg); }
    100% { transform: translateY(0px) rotateX(2deg) rotateY(-2deg); }
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 25px;
    padding: 12px 20px;
    background: #f8fafc;
    border-radius: 50px;
}

.dot {
    width: 12px;
    height: 12px;
    background-color: #10b981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.status-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: #374151;
}

.speed-data {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 20px;
}

.speed-item {
    flex: 1;
    background: #f0fdf4;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.speed-item:nth-child(2) {
    background: #eff6ff;
}

.speed-item .label {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 8px;
    font-weight: 500;
}

.speed-item .value {
    font-size: 2rem;
    font-weight: bold;
    color: #111827;
}

.speed-item .value small {
    font-size: 0.9rem;
    color: #6b7280;
    font-weight: normal;
}

/* 背景光晕 */
.hero-glow {
    position: absolute;
    width: 300px;
    height: 300px;
    background: #60a5fa;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    top: 10%;
    right: 20%;
    z-index: 1;
    animation: drift 10s linear infinite alternate;
}

@keyframes drift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-50px, 50px); }
}

/* 通用区段样式 */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 50px;
    color: #1f2937;
    font-weight: bold;
}

/* 核心优势卡片 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.03);
    text-align: center;
    border: 1px solid #f3f4f6;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.06);
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
}

/* 流媒体与AI */
.media-ai {
    background: #fff;
}

.media-ai-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
}

.media-icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
    max-width: 800px;
}

.media-tag {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 1rem;
    color: #475569;
    font-weight: 600;
    transition: all 0.3s;
}

.media-tag:hover {
    background: #eff6ff;
    color: #2563eb;
    border-color: #bfdbfe;
    transform: scale(1.05);
}

/* 价格表 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    align-items: center;
}

.pricing-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.03);
    text-align: center;
    border: 1px solid #e5e7eb;
    transition: transform 0.3s;
}

.pricing-card:hover {
    transform: translateY(-5px);
}

.pricing-card.popular {
    background: #1e3a8a;
    color: #fff;
    border: none;
    padding: 50px 30px;
    box-shadow: 0 20px 40px rgba(30, 58, 138, 0.2);
}

.pricing-card.popular h3, 
.pricing-card.popular .price, 
.pricing-card.popular .pricing-features li,
.pricing-card.popular .price span {
    color: #fff;
}

.pricing-card.popular .pricing-features li {
    border-color: rgba(255,255,255,0.1);
}

.pricing-card.popular .btn {
    background: #fff;
    color: #1e3a8a;
}

.pricing-card.popular .btn:hover {
    background: #f3f4f6;
}

.pricing-badge {
    background: #ef4444;
    color: #fff;
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 15px;
    font-weight: bold;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: #1f2937;
    margin-bottom: 25px;
}

.price span {
    font-size: 1rem;
    color: #6b7280;
    font-weight: normal;
}

.pricing-features {
    list-style: none;
    margin-bottom: 35px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    color: #4b5563;
    border-bottom: 1px solid #f3f4f6;
    display: flex;
    align-items: center;
}

.pricing-features li::before {
    content: "✓";
    color: #10b981;
    font-weight: bold;
    margin-right: 10px;
}

.pricing-card.popular .pricing-features li::before {
    color: #60a5fa;
}

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

.faq-item {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    border: 1px solid #f3f4f6;
}

.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: #1f2937;
}

.faq-item p {
    color: #6b7280;
}

/* 评价 */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.review-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    border: 1px solid #f3f4f6;
    position: relative;
}

.review-card::before {
    content: '"';
    font-size: 4rem;
    color: #eff6ff;
    position: absolute;
    top: -10px;
    left: 20px;
    font-family: serif;
}

.review-card p {
    font-size: 1.05rem;
    color: #4b5563;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.review-author {
    font-weight: bold;
    color: #1f2937;
    display: flex;
    align-items: center;
    gap: 10px;
}

.review-author::before {
    content: "";
    display: inline-block;
    width: 30px;
    height: 2px;
    background: #3b82f6;
}

/* 页脚 */
footer {
    background: #111827;
    color: #d1d5db;
    padding: 50px 0 20px;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-links a {
    color: #9ca3af;
    transition: color 0.3s;
    font-weight: 500;
}

.footer-links a:hover {
    color: #fff;
}

.copyright {
    font-size: 0.9rem;
    color: #6b7280;
    margin-top: 30px;
    border-top: 1px solid #374151;
    padding-top: 20px;
}

/* SEO 文章区 */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}
.blog-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.03);
    border: 1px solid #f3f4f6;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}
.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.06);
}
.blog-image {
    height: 180px;
    position: relative;
}
.bg-1 { background: linear-gradient(135deg, #f6d365, #fda085); }
.bg-2 { background: linear-gradient(135deg, #84fab0, #8fd3f4); }
.bg-3 { background: linear-gradient(135deg, #a18cd1, #fbc2eb); }
.bg-4 { background: linear-gradient(135deg, #ff9a9e, #fecfef); }
.bg-5 { background: linear-gradient(135deg, #fbc2eb, #a6c1ee); }
.bg-6 { background: linear-gradient(135deg, #f6d365, #8fd3f4); }
.bg-7 { background: linear-gradient(135deg, #e0c3fc, #8ec5fc); }
.bg-8 { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.bg-9 { background: linear-gradient(135deg, #43e97b, #38f9d7); }

.blog-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.blog-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 10px;
    line-height: 1.4;
}
.blog-title a { transition: color 0.3s; }
.blog-title a:hover { color: #3b82f6; }
.blog-desc {
    color: #6b7280;
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.6;
    flex: 1;
}
.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f3f4f6;
    padding-top: 15px;
    font-size: 0.85rem;
    color: #9ca3af;
}

/* 移动端适配 */
@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
    
    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-text p {
        font-size: 1.1rem;
    }
    
    .pricing-card.popular {
        padding: 40px 30px;
    }
}