/* Reset and Base Styles */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&family=Sora:wght@600;800&display=swap');

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.75;
    color: #1B3A4B;
    background-color: #F7FAFC;
    font-size: 16px;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Sora', 'Noto Sans SC', sans-serif;
    font-weight: 800;
    color: #1B3A4B;
}

h1 {
    font-size: clamp(36px, 5vw, 72px);
    line-height: 1.1;
    margin-bottom: 24px;
}

h2.section-title {
    font-size: clamp(28px, 4vw, 42px);
    text-align: center;
    margin-bottom: 50px;
    font-weight: 600;
}

a {
    text-decoration: none;
    color: #2D9CDB;
    transition: color 0.25s ease;
}

a:hover {
    color: #1a7eb5;
}

ul { list-style: none; }

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

.text-center { text-align: center; }
.muted { color: #6B8494; }

/* Buttons */
.btn-primary, .btn-large {
    display: inline-block;
    background-color: #2D9CDB;
    color: #ffffff;
    padding: 14px 32px;
    border-radius: 999px; /* Pill */
    font-weight: 600;
    text-align: center;
    transition: all 0.25s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(45, 156, 219, 0.2);
}

.btn-primary:hover, .btn-large:hover {
    background-color: #1a7eb5;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(45, 156, 219, 0.3);
}

.btn-large {
    font-size: 1.125rem;
    padding: 18px 40px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Header & Nav */
.header {
    background: rgba(247, 250, 252, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(45, 156, 219, 0.1);
}

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

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Sora', 'Noto Sans SC', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: #1B3A4B;
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    color: #1B3A4B;
    font-weight: 500;
}

.nav-menu a:hover {
    color: #2D9CDB;
}

/* Background Clouds & Animations */
@keyframes bob {
    0% { transform: translateY(0); }
    100% { transform: translateY(-15px); }
}

@keyframes driftUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.bg-cloud {
    position: absolute;
    opacity: 0.06;
    z-index: 1;
    animation: bob 6s ease-in-out infinite alternate;
}

.drift-in {
    animation: driftUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Sections */
section {
    padding: 100px 0;
    position: relative;
}

.band {
    background-color: #EAF3F9;
}

/* Cards */
.card {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 12px 40px rgba(45, 156, 219, 0.08);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 50px rgba(45, 156, 219, 0.14);
}

/* Hero Section */
.hero {
    overflow: hidden;
    padding: 120px 0;
}

.hero .grid-2 {
    align-items: center;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: #6B8494;
    margin-bottom: 40px;
    max-width: 90%;
}

.hero-mockup-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
}

.cloud-mask {
    background: #DCEBF5;
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    width: 450px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 50px rgba(255,255,255,0.5);
    animation: bob 8s ease-in-out infinite alternate;
}

.mockup-img {
    width: 80%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(27, 58, 75, 0.15);
}

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

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
}

.icon-chip {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: #DCEBF5;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.icon-chip svg {
    width: 28px;
    height: 28px;
    fill: #2D9CDB;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: #6B8494;
}

/* Highlight List */
.highlight-list {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 12px 40px rgba(45, 156, 219, 0.08);
}

.highlight-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.125rem;
    margin-bottom: 20px;
    color: #1B3A4B;
    font-weight: 500;
}

.highlight-list li:last-child { margin-bottom: 0; }
.highlight-list li svg { fill: #FFB84D; }

/* Pricing */
.pricing-card {
    text-align: center;
    position: relative;
    border: 2px solid transparent;
}

.pricing-card.popular {
    border-color: #2D9CDB;
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-8px);
}

.badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: #FFB84D;
    color: #1B3A4B;
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 700;
}

.price {
    font-family: 'Sora', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    color: #1B3A4B;
    margin: 24px 0;
    line-height: 1;
}

.price span {
    font-size: 1rem;
    color: #6B8494;
    font-weight: 400;
}

.pricing-card ul {
    margin-bottom: 30px;
    text-align: left;
}

.pricing-card ul li {
    padding: 12px 0;
    border-bottom: 1px solid #EAF3F9;
    color: #6B8494;
}

/* FAQ & Footer */
.faq-item {
    background: #ffffff;
    padding: 24px 30px;
    border-radius: 16px;
    margin-bottom: 16px;
    box-shadow: 0 4px 15px rgba(45, 156, 219, 0.05);
}

.faq-item h4 { margin-bottom: 8px; }

.footer {
    background: #1B3A4B;
    color: #DCEBF5;
    padding: 60px 0 30px;
    text-align: center;
}

.footer a {
    color: #DCEBF5;
    margin: 0 15px;
}

.footer a:hover { color: #ffffff; }
.copyright { margin-top: 30px; color: #6B8494; font-size: 0.875rem; }

/* Media Queries */
@media (max-width: 992px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hero .grid-2 { grid-template-columns: 1fr; text-align: center; gap: 40px; }
    .hero-subtitle { margin: 0 auto 30px; }
    .pricing-card.popular { transform: none; }
    .pricing-card.popular:hover { transform: translateY(-8px); }
}

@media (max-width: 768px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .nav-menu { display: none; /* simple mobile nav hide for brevity */ }
    .cloud-mask { width: 300px; height: 260px; }
}

/* New Additions: Floating Btn & FAQ Expansion & Next Article */
.floating-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: #2D9CDB;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(45, 156, 219, 0.4);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.2s ease;
    z-index: 1000;
    pointer-events: none;
}
.floating-btn.visible {
    opacity: 1;
    pointer-events: auto;
}
.floating-btn:hover {
    transform: translateY(-5px);
    color: white;
}
.next-article {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid #EAF3F9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.next-article-info {
    flex: 1;
    padding-right: 20px;
}
.next-article-info span {
    font-size: 0.85rem;
    color: #6B8494;
    font-weight: 700;
}
.next-article-info h3 {
    margin-top: 8px;
    font-size: 1.125rem;
    line-height: 1.4;
}
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}
@media(max-width: 768px) {
    .faq-grid, .next-article { grid-template-columns: 1fr; flex-direction: column; align-items: flex-start; }
    .next-article a { margin-top: 20px; }
    .floating-btn { bottom: 20px; right: 20px; }
}