/* Dawn Sky Fresh Style - Sticky Stacking Cards Layout */
@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@400;600;700&family=Noto+Sans+SC:wght@300;400;700;900&display=swap');

:root {
    --dawn-blue: #a1c4fd;
    --dawn-cyan: #c2e9fb;
    --dawn-peach: #fff1eb;
    --dawn-pink: #ffe2e2;
    --dawn-light: #e8f0fe;
    --text-dark: #2c3e50;
    --text-muted: #546e7a;
    --accent-color: #ff7e67;
    --font-en: 'Quicksand', sans-serif;
    --font-cn: 'Noto Sans SC', sans-serif;
}

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

body {
    background-color: var(--dawn-blue);
    color: var(--text-dark);
    font-family: var(--font-cn);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .font-en { font-family: var(--font-en); }
a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; height: auto; display: block; border-radius: 20px; }

/* 1. Floating Pill Navigation */
.top-nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 50px;
    padding: 10px 30px;
    display: flex;
    align-items: center;
    gap: 40px;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.nav-brand {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--text-dark);
    letter-spacing: 1px;
}

.nav-links { display: flex; gap: 25px; }
.nav-links a { font-weight: 600; color: var(--text-muted); font-size: 0.95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--accent-color); }

.nav-actions { display: flex; align-items: center; gap: 20px; }
.nav-lang { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; }
.btn-nav {
    background: var(--accent-color);
    color: #fff;
    padding: 10px 25px;
    border-radius: 30px;
    font-weight: 700;
    box-shadow: 0 5px 15px rgba(255, 126, 103, 0.3);
}
.btn-nav:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255, 126, 103, 0.4); }

/* 2. Sticky Stacking Cards Layout */
.stack-container {
    position: relative;
    padding-bottom: 0;
}

.stack-card {
    position: sticky;
    min-height: 100vh;
    border-radius: 40px 40px 0 0;
    padding: 80px 5%;
    box-shadow: 0 -15px 40px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

.card-1 { top: 0; background: linear-gradient(135deg, var(--dawn-blue) 0%, var(--dawn-cyan) 100%); padding-top: 120px; }
.card-2 { top: 20px; background: #ffffff; }
.card-3 { top: 40px; background: var(--dawn-peach); }
.card-4 { top: 60px; background: var(--dawn-light); }
.card-5 { top: 80px; background: var(--text-dark); color: #fff; min-height: auto; padding-bottom: 40px; }

.container { max-width: 1200px; margin: 0 auto; width: 100%; }
.section-title { font-size: 2.8rem; margin-bottom: 60px; text-align: center; color: inherit; }

/* 3. Hero Section (Card 1) */
.hero-layout {
    display: flex;
    align-items: center;
    gap: 60px;
}
.hero-text { flex: 1; }
.hero-text h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    font-weight: 900;
    color: var(--text-dark);
}
.hero-text p { font-size: 1.2rem; color: var(--text-dark); opacity: 0.8; margin-bottom: 40px; }
.hero-actions { display: flex; gap: 20px; margin-bottom: 40px; }
.btn-primary {
    background: var(--text-dark);
    color: #fff;
    padding: 15px 35px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 10px 20px rgba(44, 62, 80, 0.2);
}
.btn-primary:hover { background: var(--accent-color); box-shadow: 0 10px 20px rgba(255, 126, 103, 0.3); transform: translateY(-2px); }
.btn-outline {
    background: rgba(255,255,255,0.5);
    color: var(--text-dark);
    padding: 15px 35px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1.1rem;
    backdrop-filter: blur(5px);
}
.btn-outline:hover { background: #fff; }

.trust-bar { display: flex; gap: 20px; font-size: 0.95rem; font-weight: 600; }
.trust-bar span::before { content: '✨'; color: var(--accent-color); margin-right: 5px; }

.hero-visual { flex: 1; position: relative; }
.hero-visual img { box-shadow: 0 20px 50px rgba(0,0,0,0.1); transform: rotate(2deg); transition: 0.5s; }
.hero-visual:hover img { transform: rotate(0deg) scale(1.02); }

/* 4. Stats & Features (Card 2) */
.stats-row {
    display: flex;
    justify-content: space-between;
    background: var(--dawn-light);
    border-radius: 30px;
    padding: 40px 60px;
    margin-bottom: 80px;
}
.stat-box text-align: center; }
.stat-box h3 { font-size: 3rem; color: var(--accent-color); line-height: 1; margin-bottom: 5px; }
.stat-box p { color: var(--text-muted); font-weight: 600; }

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.feature-card {
    padding: 40px;
    border-radius: 30px;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
    transition: 0.3s;
}
.feature-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0,0,0,0.08); border-color: var(--dawn-blue); }
.feature-card img { width: 80px; height: 80px; margin-bottom: 25px; }
.feature-card h3 { font-size: 1.5rem; margin-bottom: 15px; color: var(--text-dark); }
.feature-card p { color: var(--text-muted); }

/* 5. Nodes & Reviews (Card 3) */
.nodes-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-bottom: 100px;
}
.cloud-tag {
    background: #fff;
    padding: 15px 30px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    transition: 0.3s;
}
.cloud-tag:hover { background: var(--accent-color); color: #fff; transform: scale(1.05); }
.cloud-tag:hover .ct-ping { color: #fff; background: rgba(0,0,0,0.1); }
.ct-city { font-weight: 700; font-size: 1.1rem; }
.ct-ping { color: var(--accent-color); font-size: 0.9rem; background: var(--dawn-peach); padding: 3px 12px; border-radius: 20px; }

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.review-box {
    background: rgba(255,255,255,0.6);
    padding: 40px;
    border-radius: 30px;
    border: 1px solid #fff;
}
.r-stars { color: var(--accent-color); margin-bottom: 15px; font-size: 1.2rem; }
.r-text { font-size: 1.1rem; color: var(--text-dark); margin-bottom: 20px; font-weight: 600; }
.r-author { font-weight: 700; color: var(--text-muted); }
.r-author span { display: block; font-weight: 400; font-size: 0.9rem; }

/* 6. Pricing (Card 4) */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: center;
}
.price-card {
    background: #fff;
    border-radius: 30px;
    padding: 50px 40px;
    text-align: center;
    box-shadow: 0 15px 30px rgba(0,0,0,0.05);
    transition: 0.3s;
}
.price-card.pro {
    background: var(--text-dark);
    color: #fff;
    transform: scale(1.05);
    box-shadow: 0 20px 50px rgba(44, 62, 80, 0.3);
}
.price-card.pro .text-muted { color: var(--dawn-blue); }
.price-card.pro .btn-primary { background: var(--accent-color); color: #fff; }

.pc-name { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; }
.pc-price { font-size: 4rem; font-weight: 900; margin-bottom: 30px; line-height: 1; }
.pc-price span { font-size: 1.2rem; font-weight: 600; }
.pc-features { list-style: none; text-align: left; margin-bottom: 40px; }
.pc-features li { padding: 12px 0; border-bottom: 1px solid rgba(0,0,0,0.05); }
.price-card.pro .pc-features li { border-bottom-color: rgba(255,255,255,0.1); }
.pc-features li::before { content: '✓'; color: var(--accent-color); margin-right: 10px; font-weight: bold; }

/* 7. FAQ & Footer (Card 5) */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 100px;
}
.faq-item {
    background: rgba(255,255,255,0.05);
    padding: 30px;
    border-radius: 20px;
}
.faq-q { font-size: 1.1rem; font-weight: 700; margin-bottom: 15px; color: var(--dawn-cyan); }
.faq-a { color: rgba(255,255,255,0.7); font-size: 0.95rem; }

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 60px;
}
.foot-brand { font-size: 2rem; font-weight: 900; color: #fff; margin-bottom: 20px; }
.foot-desc { color: rgba(255,255,255,0.7); }
.foot-col h4 { color: var(--dawn-cyan); margin-bottom: 20px; }
.foot-col ul { list-style: none; }
.foot-col li { margin-bottom: 12px; }
.foot-col a { color: rgba(255,255,255,0.7); }
.foot-col a:hover { color: #fff; }
.foot-copy { text-align: center; color: rgba(255,255,255,0.5); font-size: 0.85rem; margin-top: 60px; }

/* Subpages */
.sub-hero { padding: 150px 5% 80px; text-align: center; }
.sub-hero h1 { font-size: 4rem; margin-bottom: 20px; color: var(--text-dark); }
.sub-hero p { font-size: 1.2rem; color: var(--text-dark); opacity: 0.8; }

.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; padding-bottom: 100px; }
.dl-card { background: #fff; border-radius: 40px; padding: 50px; text-align: center; box-shadow: 0 15px 40px rgba(0,0,0,0.05); transition: 0.3s; }
.dl-card:hover { transform: translateY(-10px); box-shadow: 0 25px 50px rgba(0,0,0,0.1); }
.dl-icon { font-size: 4rem; margin-bottom: 20px; }
.dl-card h3 { font-size: 1.8rem; margin-bottom: 15px; color: var(--text-dark); }
.dl-card p { color: var(--text-muted); margin-bottom: 30px; }

.help-layout { display: grid; grid-template-columns: 250px 1fr; gap: 60px; padding-bottom: 100px; }
.help-nav { position: sticky; top: 120px; display: flex; flex-direction: column; gap: 15px; }
.help-nav a { padding: 15px 25px; background: #fff; border-radius: 20px; color: var(--text-muted); font-weight: 600; box-shadow: 0 5px 15px rgba(0,0,0,0.03); }
.help-nav a.active, .help-nav a:hover { background: var(--accent-color); color: #fff; }
.help-doc { background: #fff; padding: 50px; border-radius: 40px; margin-bottom: 40px; box-shadow: 0 15px 40px rgba(0,0,0,0.05); }
.help-doc h3 { font-size: 2rem; color: var(--text-dark); margin-bottom: 20px; }
.help-doc p, .help-doc li { color: var(--text-muted); margin-bottom: 15px; font-size: 1.05rem; }
.help-doc ul { padding-left: 20px; }

/* Responsive */
@media (max-width: 1024px) {
    .nav-links { display: none; }
    .hero-layout { flex-direction: column; text-align: center; }
    .hero-actions, .trust-bar { justify-content: center; }
    .stats-row { flex-wrap: wrap; gap: 30px; justify-content: space-around; }
    .features-grid, .reviews-grid, .pricing-grid, .faq-grid { grid-template-columns: repeat(2, 1fr); }
    .price-card.pro { transform: none; }
    .foot-grid { grid-template-columns: 1fr 1fr; }
    .help-layout { grid-template-columns: 1fr; }
    .help-nav { position: static; flex-direction: row; flex-wrap: wrap; }
}
@media (max-width: 768px) {
    .stack-card { border-radius: 30px 30px 0 0; padding: 60px 5%; }
    .card-1 { padding-top: 100px; }
    .hero-text h1 { font-size: 3rem; }
    .features-grid, .reviews-grid, .pricing-grid, .faq-grid, .dl-grid { grid-template-columns: 1fr; }
    .foot-grid { grid-template-columns: 1fr; text-align: center; }
    .stats-row { flex-direction: column; text-align: center; }
}