@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;800&display=swap');

/* Reset & Premium Base */
:root {
    --primary-color: #00f2fe;
    --primary-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --bg-dark: #0a0e17;
    --bg-surface: #111827;
    --bg-surface-hover: #1f2937;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --border-color: rgba(255, 255, 255, 0.1);
    --glow-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-dark);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
}

body::before, body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -2;
    opacity: 0.35;
    animation: aurora 20s infinite alternate ease-in-out;
    pointer-events: none;
}

body::before {
    width: 50vw;
    height: 50vw;
    background: #00f2fe;
    top: -20vw;
    left: -20vw;
}

body::after {
    width: 60vw;
    height: 60vw;
    background: #4facfe;
    bottom: -25vw;
    right: -20vw;
    animation-delay: -10s;
    animation-duration: 25s;
}

@keyframes aurora {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(5%, 10%) scale(1.2); }
    100% { transform: translate(-5%, -5%) scale(0.9); }
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

a:hover {
    color: #fff;
    text-shadow: 0 0 8px rgba(0, 242, 254, 0.6);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 60px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}

.bg-light {
    background-color: #0d131f;
}

/* Premium Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    min-height: 48px;
    line-height: 24px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #000 !important;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 242, 254, 0.4);
    color: #000 !important;
    text-shadow: none;
}

.btn-large {
    padding: 14px 36px;
    font-size: 1.05rem;
}

.btn-outline {
    background-color: transparent;
    color: #fff !important;
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-gradient);
    color: #000 !important;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--glow-shadow);
    text-shadow: none;
}

/* Glassmorphism Header */
.header {
    background-color: rgba(10, 14, 23, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color 0.3s ease;
}

.header:hover {
    background-color: rgba(10, 14, 23, 0.9);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
    text-shadow: none;
}

.nav {
    display: flex;
    gap: 35px;
}

.nav a {
    color: var(--text-main);
    font-weight: 500;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--primary-gradient);
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

.nav a:hover {
    color: #fff;
    text-shadow: none;
}

/* Hero Section with Animation */
.hero {
    padding: 150px 0 120px;
    text-align: center;
    background: radial-gradient(circle at 50% 0%, rgba(0, 242, 254, 0.15) 0%, transparent 60%);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg width="20" height="20" xmlns="http://www.w3.org/2000/svg"><circle cx="2" cy="2" r="1" fill="rgba(255,255,255,0.03)"/></svg>') repeat;
    z-index: -1;
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 25px;
    line-height: 1.3;
    color: #fff;
    text-shadow: 0 0 40px rgba(0, 242, 254, 0.2);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 25px;
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

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

/* Grids */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

/* Interactive Cards */
.card {
    background: var(--bg-surface);
    padding: 40px 30px;
    border-radius: 20px;
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 2px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.card:hover {
    transform: translateY(-10px);
    background: var(--bg-surface-hover);
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 10px rgba(0,242,254,0.3));
    transition: transform 0.4s ease;
}

.card:hover .card-icon {
    transform: scale(1.1);
}

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

.card p {
    color: var(--text-muted);
}

.small-card {
    padding: 25px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-weight: 600;
    font-size: 1.1rem;
    color: #fff;
    text-decoration: none;
    min-height: 80px;
}

.small-card:hover {
    color: var(--primary-color);
}

.sitemap-section {
    margin-bottom: 60px;
}

.sitemap-section h2 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

.flex-card {
    display: flex;
    gap: 25px;
    align-items: flex-start;
}

.flex-card .card-icon {
    margin-bottom: 0;
    font-size: 4rem;
}

.flex-card .card-content h3 {
    margin-top: 5px;
}

/* Pricing - Premium Feel */
.price-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 50px 35px;
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all 0.4s ease;
}

.price-card:hover {
    border-color: rgba(0, 242, 254, 0.3);
    background: var(--bg-surface-hover);
}

.price-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #fff;
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 30px;
    text-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
}

.price span {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-muted);
    text-shadow: none;
}

.price-features {
    list-style: none;
    margin-bottom: 40px;
    text-align: left;
    flex-grow: 1;
}

.price-features li {
    margin-bottom: 18px;
    color: var(--text-muted);
    padding-left: 32px;
    position: relative;
}

.price-features li::before {
    content: "✦";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

.price-card.popular {
    background: linear-gradient(180deg, rgba(17, 24, 39, 1) 0%, rgba(0, 242, 254, 0.05) 100%);
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 30px rgba(0, 242, 254, 0.15);
    transform: scale(1.05);
    z-index: 10;
}

.price-card.popular:hover {
    box-shadow: 0 0 50px rgba(0, 242, 254, 0.25);
    transform: scale(1.05) translateY(-5px);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-gradient);
    color: #000;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: var(--glow-shadow);
}

/* Reviews */
.review-card {
    background: var(--bg-surface);
    padding: 35px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    position: relative;
}

.review-card::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 20px;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.05);
    font-family: serif;
}

.review-text {
    font-style: italic;
    color: var(--text-main);
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

.review-author {
    font-weight: 600;
    color: var(--primary-color);
}

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

.faq-item {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-bottom-color: var(--primary-color);
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: #fff;
    display: flex;
    align-items: center;
}

.faq-item h4::before {
    content: 'Q.';
    color: var(--primary-color);
    margin-right: 10px;
    font-weight: 800;
}

.faq-item p {
    color: var(--text-muted);
    padding-left: 32px;
}

/* Footer */
.footer {
    background: #05070a;
    border-top: 1px solid var(--border-color);
    padding: 80px 0 40px;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-links a {
    color: var(--text-muted);
    font-weight: 500;
}

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

.copyright {
    font-size: 0.95rem;
    color: #4b5563;
}

/* Subpages Content */
.page-header {
    background: radial-gradient(circle at 50% 0%, rgba(0, 242, 254, 0.1) 0%, transparent 70%);
    padding: 100px 0 60px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.2rem;
    color: #fff;
    text-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
}

.page-content {
    max-width: 800px;
    margin: 80px auto;
    padding: 0 20px;
}

.page-content h2 {
    font-size: 1.6rem;
    margin: 50px 0 25px;
    color: #fff;
}

.page-content p {
    margin-bottom: 20px;
    color: var(--text-muted);
    font-size: 1.05rem;
}

.page-content ul {
    margin-bottom: 30px;
    padding-left: 20px;
    color: var(--text-muted);
    font-size: 1.05rem;
}

.page-content li {
    margin-bottom: 12px;
}

.page-content a {
    text-decoration: underline;
    text-decoration-color: var(--primary-color);
    text-underline-offset: 4px;
}

/* Responsive (Media Queries) */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.4rem;
    }
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .price-card.popular {
        transform: scale(1);
    }
    .price-card.popular:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        height: auto;
        padding: 20px 0;
        gap: 20px;
    }
    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    .hero {
        padding: 100px 0 80px;
    }
    .hero-title {
        font-size: 1.8rem;
    }
    .hero-subtitle {
        font-size: 1rem;
        padding: 0 10px;
    }
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
        padding: 0 20px;
    }
    .hero .btn {
        width: 100%;
        padding: 16px 30px;
        margin-top: 0;
    }
    /* Mobile Single Column Enforced */
    .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }
    .flex-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .price-card.popular {
        transform: scale(1);
    }
    .price-card.popular:hover {
        transform: translateY(-5px);
    }
    .footer-links {
        flex-direction: column;
        gap: 20px;
    }
    .btn {
        width: 100%;
        display: block;
        margin-top: 10px;
    }
    .header .btn {
        width: 100%; 
        max-width: 250px;
    }
}

/* Accessibility & FAQ Overrides */
.skip-link { position: absolute; top: -100px; left: 0; background: var(--primary-color); color: #000; padding: 12px 24px; z-index: 9999; transition: top 0.3s; text-decoration: none; font-weight: bold; }
.skip-link:focus { top: 0; }
*:focus-visible { outline: 3px solid var(--primary-color) !important; outline-offset: 2px !important; }
#features, #streaming, #pricing, #faq { scroll-margin-top: 100px; }
.faq-item { cursor: pointer; }
.faq-item summary { list-style: none; outline: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item[open] p { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }