/* 高级极简亮色 CSS (Premium Bright Glassmorphism) */
:root {
    --primary-bright: #00f2fe;
    --primary-deep: #4facfe;
    --gradient-main: linear-gradient(135deg, var(--primary-bright) 0%, var(--primary-deep) 100%);
    --bg-color: #f4f9fb;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.6);
    --text-dark: #1e293b;
    --text-light: #64748b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(0, 242, 254, 0.12) 0px, transparent 40%),
        radial-gradient(at 100% 100%, rgba(79, 172, 254, 0.12) 0px, transparent 40%);
    background-attachment: fixed;
    min-height: 100vh;
}

/* 悬浮高级椭圆导航栏 */
header {
    position: sticky;
    top: 20px;
    z-index: 100;
    padding: 0 20px;
    pointer-events: none;
}
.nav-container {
    pointer-events: auto;
    max-width: 900px;
    margin: 0 auto;
    padding: 10px 25px 10px 35px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 60px; /* 完美椭圆 */
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--glass-border);
}
.logo {
    font-size: 1.4rem;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}
nav ul {
    list-style: none;
    display: flex;
    gap: 35px;
}
nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s;
}
nav a:hover {
    color: var(--primary-deep);
}
.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    padding: 12px 28px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
    transition: all 0.3s;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.5);
}

/* Hero Section */
.hero {
    display: flex;
    max-width: 1200px;
    margin: 60px auto 100px;
    padding: 0 20px;
    align-items: center;
    gap: 60px;
}
.hero-content {
    flex: 1;
}
.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 25px;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -1px;
}
.hero-content p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 40px;
}
.btn-large {
    background: var(--gradient-main);
    color: #fff;
    padding: 18px 45px;
    font-size: 1.1rem;
    border-radius: 40px;
    text-decoration: none;
    display: inline-block;
    font-weight: 700;
    box-shadow: 0 10px 30px rgba(79, 172, 254, 0.3);
    transition: all 0.3s;
}
.btn-large:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(79, 172, 254, 0.5);
}

.hero-animation {
    flex: 1;
    position: relative;
    height: 380px;
    perspective: 1000px;
}
.streaming-mockup {
    background: rgba(15, 23, 42, 0.9);
    border-radius: 16px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.2), 0 0 0 1px rgba(255,255,255,0.1);
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: rotateY(-15deg) rotateX(5deg) scale(0.95);
    transition: transform 0.5s ease;
    animation: float-mockup 6s ease-in-out infinite;
}
@keyframes float-mockup {
    0%, 100% { transform: translateY(0) rotateY(-15deg) rotateX(5deg) scale(0.95); }
    50% { transform: translateY(-15px) rotateY(-10deg) rotateX(2deg) scale(0.95); }
}
.streaming-mockup:hover {
    transform: translateY(-5px) rotateY(0deg) rotateX(0deg) scale(1.02);
}
.mockup-header {
    height: 36px;
    background: rgba(30, 41, 59, 0.9);
    display: flex;
    align-items: center;
    padding: 0 15px;
    gap: 8px;
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }
.mockup-url { color: #94a3b8; font-size: 12px; margin-left: 10px; font-family: monospace; background: #0f172a; padding: 2px 10px; border-radius: 10px; }
.mockup-body { padding: 25px; flex: 1; }
.mockup-title { color: #f8fafc; font-weight: 800; margin-bottom: 20px; font-size: 1.2rem; }
.poster-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.poster {
    height: 120px;
    border-radius: 10px;
    background-color: #1e293b;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    transition: transform 0.3s;
    cursor: pointer;
}
.poster:hover { transform: scale(1.05); }
.poster::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, transparent 60%);
}
.poster-info {
    position: absolute;
    bottom: 12px;
    left: 12px;
    color: #fff;
    z-index: 2;
    font-size: 0.95rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.8);
}
.nf-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #E50914;
    color: white;
    font-size: 10px;
    padding: 3px 6px;
    border-radius: 3px;
    font-weight: 900;
    z-index: 2;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}
.poster-1 { background-image: linear-gradient(135deg, #434343 0%, #000000 100%); }
.poster-2 { background-image: linear-gradient(135deg, #f43b47 0%, #453a94 100%); }
.poster-3 { background-image: linear-gradient(135deg, #0ba360 0%, #3cba92 100%); }
.poster-4 { background-image: linear-gradient(135deg, #30cfd0 0%, #330867 100%); }

/* Common Sections */
section {
    padding: 100px 20px;
    max-width: 1200px;
    margin: 0 auto;
}
h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    font-weight: 800;
}

/* Features */
.features { }
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}
.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 40px rgba(0,0,0,0.03);
    transition: transform 0.3s;
}
.feature-card:hover { transform: translateY(-10px); }
.feature-card h3 { 
    margin-bottom: 20px; 
    font-size: 1.5rem;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    color: transparent;
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: center;
}
.price-card {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--glass-border);
    padding: 50px 40px;
    border-radius: 30px;
    text-align: center;
    transition: all 0.4s;
}
.price-card:hover { transform: translateY(-10px); background: #fff; box-shadow: 0 20px 40px rgba(0,0,0,0.05); }
.price-card.popular {
    background: #fff;
    border: 2px solid var(--primary-bright);
    box-shadow: 0 20px 50px rgba(79, 172, 254, 0.2);
    transform: scale(1.05);
    position: relative;
}
.price-card.popular:hover { transform: scale(1.05) translateY(-10px); }
.price-card h3 { font-size: 1.4rem; margin-bottom: 20px; color: var(--text-dark); }
.price { font-size: 3rem; font-weight: 900; margin-bottom: 30px; color: var(--primary-deep); }
.price span { font-size: 1.1rem; color: var(--text-light); font-weight: normal; }
.price-card ul { list-style: none; margin-bottom: 40px; text-align: left; }
.price-card li { margin-bottom: 15px; padding-left: 35px; position: relative; font-weight: 500; color: var(--text-dark); }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: #fff; background: var(--gradient-main); width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold; }
.btn-buy {
    display: block;
    background: transparent;
    color: var(--primary-deep);
    border: 2px solid var(--primary-deep);
    padding: 15px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s;
}
.btn-buy:hover { background: var(--primary-deep); color: #fff; }
.popular .btn-buy { background: var(--gradient-main); color: #fff; border: none; box-shadow: 0 10px 20px rgba(79, 172, 254, 0.3); }
.popular .btn-buy:hover { box-shadow: 0 15px 30px rgba(79, 172, 254, 0.5); }

/* Premium Article Presentation */
.articles { padding-top: 50px; }
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}
.article-card {
    display: flex;
    flex-direction: column;
    padding: 40px 30px;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.02);
}
.article-card::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 180px;
    height: 180px;
    background: var(--gradient-main);
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: -1;
}
.article-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px rgba(79, 172, 254, 0.15);
    border-color: rgba(79, 172, 254, 0.4);
    background: #fff;
}
.article-card:hover::before { opacity: 0.15; }
.article-title {
    font-weight: 800;
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: var(--text-dark);
    line-height: 1.4;
    position: relative;
    padding-bottom: 18px;
}
.article-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 4px;
    background: var(--gradient-main);
    border-radius: 2px;
    transition: width 0.4s ease;
}
.article-card:hover .article-title::after { width: 100px; }
.article-desc { font-size: 1rem; color: var(--text-light); line-height: 1.6; }

/* Testimonials */
.testimonial-grid { display: flex; gap: 30px; flex-wrap: wrap; justify-content: center; }
.testimonial-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 40px;
    border-radius: 30px;
    max-width: 500px;
    font-size: 1.1rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}
.testimonial-card p { font-style: italic; color: var(--text-dark); }
.testimonial-card span { display: block; margin-top: 20px; font-weight: 800; color: var(--primary-deep); font-style: normal; }

/* FAQ */
.faq { max-width: 900px; }
.faq-item {
    margin-bottom: 25px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}
.faq-item h3 { margin-bottom: 15px; color: var(--text-dark); font-size: 1.2rem; }
.faq-item p { color: var(--text-light); }

/* Footer */
footer {
    background: #0f172a;
    color: #fff;
    padding: 80px 20px 40px;
    text-align: center;
    border-top-left-radius: 40px;
    border-top-right-radius: 40px;
    margin-top: 50px;
}
.footer-links {
    margin-bottom: 40px;
    display: flex;
    justify-content: center;
    gap: 40px;
}
.footer-links a { color: #94a3b8; text-decoration: none; font-weight: 500; transition: color 0.3s; }
.footer-links a:hover { color: #fff; }

.pbn-links { margin-bottom: 30px; font-size: 0.95rem; color: #64748b; }
.seo-link { color: var(--primary-bright); text-decoration: none; margin: 0 12px; font-weight: 600; }
.seo-link:hover { text-decoration: underline; color: #fff; }

.copyright { color: #475569; font-size: 0.9rem; }

/* Mobile Responsive */
@media (max-width: 768px) {
    header { top: 10px; }
    .nav-container { padding: 10px 20px; border-radius: 40px; }
    nav ul { display: none; }
    .hero { flex-direction: column; text-align: center; margin: 40px auto; gap: 40px; }
    .hero-content h1 { font-size: 2.5rem; }
    .hero-animation { width: 100%; height: 280px; }
    .price-card.popular { transform: none; }
    .price-card.popular:hover { transform: translateY(-10px); }
    h2 { font-size: 2rem; margin-bottom: 40px; }
    .pricing-grid { grid-template-columns: 1fr; gap: 20px; }
    .article-grid { grid-template-columns: 1fr; }
}

@media (max-width: 1100px) and (min-width: 769px) {
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --- Article Typography Overrides --- */
.article-content {
    max-width: 850px !important;
    padding: 60px 70px !important;
    border-radius: 24px !important;
    background: rgba(255, 255, 255, 0.9) !important;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08) !important;
}
.article-content h1 {
    font-size: 2.6rem !important;
    font-weight: 900 !important;
    margin-bottom: 40px !important;
    letter-spacing: -0.5px !important;
    color: #0f172a !important;
}
.article-content div {
    font-size: 1.15rem !important;
    line-height: 2.2 !important;
    color: #334155 !important;
    text-align: justify !important;
    letter-spacing: 0.5px !important;
}
.article-content h2 {
    font-size: 1.6rem !important;
    color: #0f172a !important;
    border-left: 6px solid var(--primary-deep) !important;
    padding-left: 18px !important;
    margin-top: 50px !important;
    margin-bottom: 25px !important;
    font-weight: 800 !important;
}
.article-content p {
    text-indent: 2em !important;
    margin-bottom: 25px !important;
}
.article-content a {
    color: var(--primary-deep) !important;
    font-weight: 700 !important;
    border-bottom: 2px solid rgba(79, 172, 254, 0.3) !important;
    padding-bottom: 2px !important;
    transition: all 0.3s !important;
    text-decoration: none !important;
}
.article-content a:hover {
    background: rgba(79, 172, 254, 0.1) !important;
    border-bottom-color: var(--primary-deep) !important;
}
@media (max-width: 768px) {
    .article-content { padding: 30px 20px !important; }
    .article-content h1 { font-size: 2rem !important; }
}