/* 3D Claymorphism Tech Style */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;800;900&family=ZCOOL+KuaiLe&display=swap');

:root {
    --clay-bg: #e0e5ec;
    --clay-primary: #ff6b6b;
    --clay-secondary: #4ecdc4;
    --clay-accent: #feca57;
    --clay-text: #2d3436;
    --clay-surface: #e0e5ec;
    
    /* Clay Shadows */
    --shadow-out: 12px 12px 24px rgba(163, 177, 198, 0.6), -12px -12px 24px rgba(255, 255, 255, 0.8);
    --shadow-in: inset 6px 6px 12px rgba(255, 255, 255, 0.8), inset -6px -6px 12px rgba(163, 177, 198, 0.5);
    --shadow-btn-in: inset 4px 4px 8px rgba(255, 255, 255, 0.4), inset -4px -4px 8px rgba(0, 0, 0, 0.1);
    
    --font-head: 'ZCOOL KuaiLe', 'Nunito', sans-serif;
    --font-body: 'Nunito', sans-serif;
}

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

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

h1, h2, h3, h4 {
    font-family: var(--font-head);
    font-weight: 900;
    letter-spacing: 1px;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

/* Clay Element Base */
.clay-box {
    background: var(--clay-surface);
    border-radius: 40px;
    box-shadow: var(--shadow-out), var(--shadow-in);
    transition: transform 0.3s ease;
}

/* Buttons */
.btn-clay {
    display: inline-block;
    padding: 15px 35px;
    border-radius: 50px;
    font-weight: 800;
    font-size: 18px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 8px 8px 16px rgba(163, 177, 198, 0.5), -8px -8px 16px rgba(255, 255, 255, 0.8), var(--shadow-btn-in);
}
.btn-clay:active {
    transform: scale(0.95);
    box-shadow: 2px 2px 5px rgba(163, 177, 198, 0.5), -2px -2px 5px rgba(255, 255, 255, 0.8), inset 4px 4px 8px rgba(0, 0, 0, 0.1);
}
.btn-primary {
    background: var(--clay-primary);
    color: #fff;
}
.btn-secondary {
    background: var(--clay-secondary);
    color: #fff;
}
.btn-accent {
    background: var(--clay-accent);
    color: var(--clay-text);
}

/* Navigation */
.clay-nav {
    position: fixed;
    top: 20px;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: center;
}
.nav-inner {
    background: var(--clay-surface);
    padding: 15px 40px;
    border-radius: 100px;
    display: flex;
    align-items: center;
    gap: 40px;
    box-shadow: var(--shadow-out), var(--shadow-in);
}
.nav-brand {
    font-family: var(--font-head);
    font-size: 28px;
    color: var(--clay-primary);
}
.nav-links {
    display: flex;
    gap: 25px;
}
.nav-links a {
    font-weight: 800;
    font-size: 16px;
    color: var(--clay-text);
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s;
}
.nav-links a:hover, .nav-links a.active {
    background: var(--clay-bg);
    box-shadow: inset 4px 4px 8px rgba(163, 177, 198, 0.5), inset -4px -4px 8px rgba(255, 255, 255, 0.8);
    color: var(--clay-primary);
}
.nav-tools {
    display: flex;
    align-items: center;
    gap: 15px;
}
.lang-tag {
    font-weight: 900;
    width: 40px; height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: var(--shadow-out), var(--shadow-in);
}

/* Hero Section */
.clay-hero {
    padding: 180px 0 100px;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 50px;
    align-items: center;
}
.hero-title {
    font-size: 64px;
    line-height: 1.2;
    margin-bottom: 25px;
    color: var(--clay-primary);
    text-shadow: 3px 3px 6px rgba(163, 177, 198, 0.5), -3px -3px 6px rgba(255, 255, 255, 0.8);
}
.hero-desc {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 40px;
    color: #555;
}
.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}
.trust-clay {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}
.trust-clay span {
    background: var(--clay-surface);
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 800;
    font-size: 14px;
    box-shadow: var(--shadow-out), var(--shadow-in);
    color: var(--clay-secondary);
}
.hero-visual {
    position: relative;
    padding: 20px;
}
.hero-visual img {
    border-radius: 50%;
    box-shadow: var(--shadow-out), var(--shadow-in);
    animation: float 6s ease-in-out infinite;
}
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Metrics - Clay Bubbles */
.clay-metrics {
    padding: 50px 0;
}
.metrics-wrap {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}
.metric-bubble {
    flex: 1;
    background: var(--clay-surface);
    border-radius: 50px;
    padding: 40px 20px;
    text-align: center;
    box-shadow: var(--shadow-out), var(--shadow-in);
    transition: transform 0.3s;
}
.metric-bubble:hover {
    transform: translateY(-10px);
}
.metric-bubble:nth-child(2) { border-radius: 40px 60px 40px 60px; }
.metric-bubble:nth-child(3) { border-radius: 60px 40px 60px 40px; }
.m-val {
    font-family: var(--font-head);
    font-size: 48px;
    color: var(--clay-primary);
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(163, 177, 198, 0.5);
}
.metric-bubble:nth-child(2) .m-val { color: var(--clay-secondary); }
.metric-bubble:nth-child(3) .m-val { color: var(--clay-accent); }
.m-lbl {
    font-weight: 800;
    font-size: 18px;
    color: #666;
}

/* Features - Soft Cards */
.clay-features {
    padding: 100px 0;
}
.sec-title {
    text-align: center;
    font-size: 48px;
    margin-bottom: 60px;
    color: var(--clay-text);
    text-shadow: 2px 2px 4px rgba(163, 177, 198, 0.5), -2px -2px 4px rgba(255, 255, 255, 0.8);
}
.feat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.f-clay-card {
    padding: 50px 40px;
    text-align: center;
}
.f-clay-card:hover {
    transform: scale(1.03);
}
.f-icon {
    width: 100px; height: 100px;
    margin: 0 auto 30px;
    background: var(--clay-surface);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    box-shadow: inset 6px 6px 12px rgba(163, 177, 198, 0.5), inset -6px -6px 12px rgba(255, 255, 255, 0.8);
}
.f-clay-card h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--clay-primary);
}
.f-clay-card p {
    font-size: 16px;
    font-weight: 600;
    color: #555;
    margin-bottom: 30px;
}
.f-list {
    list-style: none;
    text-align: left;
}
.f-list li {
    font-weight: 800;
    font-size: 15px;
    padding: 12px 0;
    border-bottom: 2px solid rgba(255,255,255,0.5);
    display: flex;
    align-items: center;
    gap: 10px;
}
.f-list li::before {
    content: '';
    width: 12px; height: 12px;
    background: var(--clay-secondary);
    border-radius: 50%;
    box-shadow: inset 2px 2px 4px rgba(0,0,0,0.2);
}

/* Nodes - Pill Grid */
.clay-nodes {
    padding: 100px 0;
}
.nodes-board {
    padding: 60px;
    text-align: center;
}
.nodes-board p {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 50px;
    color: #666;
}
.node-pill-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 25px;
}
.node-pill {
    background: var(--clay-surface);
    padding: 15px 30px;
    border-radius: 50px;
    box-shadow: var(--shadow-out), var(--shadow-in);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s;
}
.node-pill:hover {
    box-shadow: inset 6px 6px 12px rgba(163, 177, 198, 0.5), inset -6px -6px 12px rgba(255, 255, 255, 0.8);
    transform: translateY(5px);
}
.n-name { font-weight: 900; font-size: 18px; }
.n-speed {
    background: var(--clay-accent);
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 800;
    font-size: 14px;
    box-shadow: inset 2px 2px 5px rgba(255,255,255,0.5);
}

/* Reviews - Soft Bubbles */
.clay-reviews {
    padding: 100px 0;
}
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.r-clay-bubble {
    padding: 40px;
    border-radius: 40px 40px 40px 10px;
    position: relative;
}
.r-stars {
    color: var(--clay-accent);
    font-size: 24px;
    margin-bottom: 20px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}
.r-text {
    font-size: 18px;
    font-weight: 600;
    color: #444;
    margin-bottom: 30px;
    line-height: 1.5;
}
.r-user {
    display: flex;
    align-items: center;
    gap: 15px;
}
.r-avatar {
    width: 50px; height: 50px;
    border-radius: 50%;
    background: var(--clay-surface);
    box-shadow: inset 4px 4px 8px rgba(163, 177, 198, 0.5), inset -4px -4px 8px rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 20px;
    color: var(--clay-primary);
}
.r-info h4 { font-size: 18px; }

/* Pricing - Stacked Clay Cards */
.clay-pricing {
    padding: 100px 0;
}
.price-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    align-items: center;
}
.p-clay-card {
    padding: 50px 40px;
    text-align: center;
    position: relative;
}
.p-clay-card.pro {
    transform: scale(1.05);
    border-radius: 50px;
}
.p-badge {
    position: absolute;
    top: -20px; left: 50%;
    transform: translateX(-50%);
    background: var(--clay-primary);
    color: #fff;
    padding: 10px 30px;
    border-radius: 30px;
    font-weight: 900;
    box-shadow: var(--shadow-out), var(--shadow-btn-in);
}
.p-title { font-size: 32px; margin-bottom: 10px; }
.p-desc { font-weight: 600; color: #666; margin-bottom: 30px; }
.p-price { font-size: 64px; font-family: var(--font-head); color: var(--clay-secondary); margin-bottom: 30px; line-height: 1; text-shadow: 2px 2px 4px rgba(163, 177, 198, 0.5); }
.p-clay-card.pro .p-price { color: var(--clay-primary); }
.p-price span { font-size: 20px; font-family: var(--font-body); color: #888; text-shadow: none; }
.p-feat { list-style: none; text-align: left; margin-bottom: 40px; }
.p-feat li { font-weight: 800; padding: 12px 0; border-bottom: 2px solid rgba(255,255,255,0.5); display: flex; align-items: center; gap: 15px; }
.p-feat li::before { content: '✔'; display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; background: var(--clay-secondary); color: #fff; border-radius: 50%; font-size: 12px; box-shadow: inset 2px 2px 4px rgba(255,255,255,0.5); }

/* FAQ - Soft Accordion */
.clay-faq {
    padding: 100px 0;
}
.faq-wrap {
    max-width: 800px;
    margin: 0 auto;
}
.q-clay-item {
    padding: 30px;
    margin-bottom: 30px;
    border-radius: 30px;
}
.q-title {
    font-size: 22px;
    font-weight: 900;
    color: var(--clay-primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
}
.q-title::before {
    content: '?';
    width: 36px; height: 36px;
    background: var(--clay-surface);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 4px 4px 8px rgba(163, 177, 198, 0.5), inset -4px -4px 8px rgba(255, 255, 255, 0.8);
}
.q-ans {
    font-size: 18px;
    font-weight: 600;
    color: #555;
    padding-left: 50px;
}

/* Footer */
.clay-footer {
    padding: 80px 0 40px;
    margin-top: 50px;
    border-radius: 80px 80px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 50px;
}
.f-brand { font-family: var(--font-head); font-size: 36px; color: var(--clay-primary); margin-bottom: 20px; }
.f-desc { font-weight: 600; color: #666; }
.f-links-wrap { display: flex; gap: 60px; }
.f-col h4 { font-size: 20px; margin-bottom: 25px; }
.f-col a { display: block; font-weight: 800; color: #666; margin-bottom: 15px; transition: color 0.3s; }
.f-col a:hover { color: var(--clay-secondary); }
.f-copy { text-align: center; font-weight: 800; color: #999; padding-top: 30px; border-top: 2px solid rgba(255,255,255,0.5); }

/* Subpages */
.sub-hero {
    padding: 180px 0 80px;
    text-align: center;
}
.sub-title { font-size: 64px; color: var(--clay-primary); margin-bottom: 20px; text-shadow: 3px 3px 6px rgba(163, 177, 198, 0.5); }
.sub-desc { font-size: 24px; font-weight: 800; color: #666; }

.dl-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
    padding-bottom: 100px;
}
.dl-clay-card {
    padding: 50px;
    display: flex;
    align-items: center;
    gap: 40px;
}
.dl-clay-card:hover { transform: translateY(-10px); }
.dl-icon {
    width: 120px; height: 120px;
    background: var(--clay-surface);
    border-radius: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    box-shadow: inset 6px 6px 12px rgba(163, 177, 198, 0.5), inset -6px -6px 12px rgba(255, 255, 255, 0.8);
}
.dl-info h3 { font-size: 32px; margin-bottom: 15px; }
.dl-info p { font-weight: 600; color: #666; margin-bottom: 25px; }

.help-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 50px;
    padding-bottom: 100px;
}
.help-nav { position: sticky; top: 120px; }
.help-nav a {
    display: block;
    padding: 18px 25px;
    border-radius: 20px;
    margin-bottom: 15px;
    font-weight: 900;
    font-size: 18px;
    color: #666;
    transition: all 0.3s;
}
.help-nav a:hover, .help-nav a.active {
    box-shadow: inset 4px 4px 8px rgba(163, 177, 198, 0.5), inset -4px -4px 8px rgba(255, 255, 255, 0.8);
    color: var(--clay-primary);
}
.help-content {
    padding: 60px;
}
.help-content h2 { font-size: 40px; color: var(--clay-secondary); margin-bottom: 40px; }
.help-content h3 { font-size: 28px; margin: 40px 0 20px; }
.help-content p, .help-content li { font-size: 18px; font-weight: 600; color: #555; margin-bottom: 20px; }
.help-content ul { padding-left: 30px; }

/* Responsive */
@media (max-width: 1024px) {
    .nav-inner { display: none; }
    .hero-grid, .dl-grid, .help-layout { grid-template-columns: 1fr; }
    .metrics-wrap { flex-wrap: wrap; }
    .metric-bubble { min-width: 45%; }
    .feat-grid, .review-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }
    .p-clay-card.pro { transform: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .help-nav { position: static; display: flex; flex-wrap: wrap; gap: 15px; }
    .help-nav a { margin-bottom: 0; }
}
@media (max-width: 768px) {
    .hero-title { font-size: 48px; }
    .hero-actions { flex-direction: column; }
    .feat-grid, .review-grid, .price-grid { grid-template-columns: 1fr; }
    .f-links-wrap { flex-direction: column; gap: 30px; }
    .dl-clay-card { flex-direction: column; text-align: center; }
}