/* Reset & Variables */
:root {
    --bg-base: #f0f2f5;
    --bg-surface: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --metal-light: #e0e5ec;
    --metal-dark: #a3b1c6;
    --accent-color: #2c3e50;
    --shadow-out: 8px 8px 16px rgba(163, 177, 198, 0.6), -8px -8px 16px rgba(255, 255, 255, 0.8);
    --shadow-in: inset 6px 6px 12px rgba(163, 177, 198, 0.6), inset -6px -6px 12px rgba(255, 255, 255, 0.8);
    --font-modern: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-modern);
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; border-radius: 16px; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--accent-color);
    font-weight: 700;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

/* Buttons (Neumorphism) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    background: var(--bg-base);
}

.btn-primary {
    color: var(--accent-color);
    box-shadow: var(--shadow-out);
}

.btn-primary:hover {
    box-shadow: var(--shadow-in);
    color: #000;
}

.btn-outline {
    color: var(--text-secondary);
    box-shadow: var(--shadow-in);
}

.btn-outline:hover {
    box-shadow: var(--shadow-out);
    color: var(--accent-color);
}

/* Header */
.top-nav {
    position: fixed;
    top: 0; width: 100%;
    background: rgba(240, 242, 245, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 15px 0;
}

.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-base);
    padding: 10px 30px;
    border-radius: 40px;
    box-shadow: var(--shadow-out);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-circle {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--bg-base);
    box-shadow: var(--shadow-in);
}

.menu {
    display: flex;
    gap: 30px;
}

.menu a {
    font-weight: 500;
    color: var(--text-secondary);
}

.menu a:hover {
    color: var(--accent-color);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang-btn {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px 16px;
    border-radius: 20px;
    box-shadow: var(--shadow-out);
}

.lang-btn:active {
    box-shadow: var(--shadow-in);
}

/* Hero */
.hero-area {
    padding: 180px 0 100px;
    text-align: center;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #2c3e50, #95a5a6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 24px;
}

/* Trust */
.trust-area {
    padding: 40px 0;
}

.trust-box {
    background: var(--bg-base);
    border-radius: 20px;
    box-shadow: var(--shadow-in);
    padding: 30px;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
}

.trust-item {
    font-weight: 600;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.trust-item::before {
    content: '';
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--bg-base);
    box-shadow: var(--shadow-out);
}

/* Stats */
.stats-area { padding: 80px 0; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-item {
    background: var(--bg-base);
    border-radius: 24px;
    box-shadow: var(--shadow-out);
    padding: 40px 20px;
    text-align: center;
}

.stat-num {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.stat-txt {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Features */
.feat-area { padding: 80px 0; }
.feat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feat-card {
    background: var(--bg-base);
    border-radius: 30px;
    box-shadow: var(--shadow-out);
    padding: 40px;
    text-align: center;
}

.feat-icon-wrap {
    width: 80px; height: 80px;
    margin: 0 auto 30px;
    border-radius: 50%;
    background: var(--bg-base);
    box-shadow: var(--shadow-in);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feat-card h3 { font-size: 1.5rem; margin-bottom: 16px; }
.feat-card p { color: var(--text-secondary); margin-bottom: 30px; }
.feat-card img { box-shadow: var(--shadow-in); padding: 10px; }

/* Nodes */
.node-area { padding: 80px 0; }
.node-wrap {
    background: var(--bg-base);
    border-radius: 40px;
    box-shadow: var(--shadow-in);
    padding: 60px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.n-card {
    background: var(--bg-base);
    border-radius: 20px;
    box-shadow: var(--shadow-out);
    padding: 20px 40px;
    text-align: center;
    flex: 1;
    min-width: 150px;
}

.n-city { font-size: 1.2rem; font-weight: 700; color: var(--accent-color); margin-bottom: 5px; }
.n-speed { color: var(--text-secondary); font-size: 0.9rem; }

/* Testimonials */
.testi-area { padding: 80px 0; }
.testi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.t-card {
    background: var(--bg-base);
    border-radius: 30px;
    box-shadow: var(--shadow-out);
    padding: 40px;
}

.t-stars { color: #f39c12; margin-bottom: 20px; font-size: 1.2rem; }
.t-txt { color: var(--text-secondary); font-style: italic; margin-bottom: 30px; }
.t-user { display: flex; align-items: center; gap: 15px; }
.t-ava {
    width: 50px; height: 50px;
    border-radius: 50%;
    background: var(--bg-base);
    box-shadow: var(--shadow-in);
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; color: var(--accent-color);
}

/* Pricing */
.price-area { padding: 80px 0; }
.price-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    align-items: center;
}

.p-card {
    background: var(--bg-base);
    border-radius: 40px;
    box-shadow: var(--shadow-out);
    padding: 50px 40px;
    text-align: center;
}

.p-card.pro {
    box-shadow: var(--shadow-in);
    transform: scale(1.05);
}

.p-title { font-size: 1.5rem; margin-bottom: 20px; }
.p-price { font-size: 3.5rem; font-weight: 800; color: var(--accent-color); margin-bottom: 30px; }
.p-price span { font-size: 1rem; color: var(--text-secondary); font-weight: normal; }
.p-list { text-align: left; margin-bottom: 40px; }
.p-list li {
    padding: 12px 0;
    color: var(--text-secondary);
    display: flex; align-items: center; gap: 10px;
}
.p-list li::before {
    content: '';
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent-color);
}

/* FAQ */
.faq-area { padding: 80px 0; }
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--bg-base);
    border-radius: 20px;
    box-shadow: var(--shadow-out);
    margin-bottom: 24px;
    padding: 24px 30px;
}

.faq-q {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 12px;
}
.faq-a {
    color: var(--text-secondary);
}

/* Footer */
.site-footer {
    padding: 80px 0 30px;
    margin-top: 60px;
    background: var(--bg-base);
    box-shadow: var(--shadow-in);
    border-radius: 60px 60px 0 0;
}
.f-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}
.f-brand .logo { margin-bottom: 20px; }
.f-brand p { color: var(--text-secondary); }
.f-links h4 { margin-bottom: 24px; }
.f-links li { margin-bottom: 12px; }
.f-links a { color: var(--text-secondary); }
.f-links a:hover { color: var(--accent-color); }
.f-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--metal-light);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Download Page */
.dl-hero { padding: 180px 0 80px; text-align: center; }
.dl-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 900px;
    margin: 0 auto 100px;
}
.dl-box {
    background: var(--bg-base);
    border-radius: 30px;
    box-shadow: var(--shadow-out);
    padding: 50px;
    text-align: center;
}
.dl-icon {
    width: 80px; height: 80px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: var(--bg-base);
    box-shadow: var(--shadow-in);
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem;
}
.dl-box h3 { margin-bottom: 16px; }
.dl-box p { color: var(--text-secondary); margin-bottom: 30px; }

/* Help Page */
.help-hero { padding: 180px 0 60px; text-align: center; }
.help-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 50px;
    margin-bottom: 100px;
}
.help-side {
    background: var(--bg-base);
    border-radius: 30px;
    box-shadow: var(--shadow-out);
    padding: 30px;
    height: fit-content;
}
.help-side li { margin-bottom: 12px; }
.help-side a {
    display: block;
    padding: 12px 20px;
    border-radius: 20px;
    color: var(--text-secondary);
    font-weight: 500;
}
.help-side a:hover, .help-side a.active {
    box-shadow: var(--shadow-in);
    color: var(--accent-color);
}
.help-main section {
    background: var(--bg-base);
    border-radius: 40px;
    box-shadow: var(--shadow-out);
    padding: 50px;
    margin-bottom: 40px;
}
.help-main h3 { margin-bottom: 24px; font-size: 1.6rem; }
.help-main p { color: var(--text-secondary); margin-bottom: 16px; }
.help-main ul, .help-main ol { margin-left: 20px; color: var(--text-secondary); }
.help-main li { margin-bottom: 10px; }

/* Responsive */
@media (max-width: 1024px) {
    .stats-grid, .feat-grid, .testi-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }
    .f-grid { grid-template-columns: 1fr 1fr; }
    .p-card.pro { transform: none; }
}
@media (max-width: 768px) {
    .menu { display: none; }
    .hero-title { font-size: 3rem; }
    .stats-grid, .feat-grid, .testi-grid, .price-grid, .dl-grid, .help-grid { grid-template-columns: 1fr; }
}