:root {
    --bg-body: #050505;
    --bg-surface: #0f1012;
    --bg-surface-hover: #18181b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --primary-accent: #FF6600;
    --secondary-accent: #FF8800;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(255, 255, 255, 0.15);
    --border-subtle: rgba(255, 255, 255, 0.04);
    --container-width: 1200px;
    --header-height: 70px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 40px;
    --ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}
a { text-decoration: none; color: inherit; transition: color 0.2s; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.ambient-light {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -1; pointer-events: none;
    background:
        radial-gradient(circle at 20% 10%, rgba(255, 102, 0, 0.07) 0%, transparent 40%),
        radial-gradient(circle at 80% 90%, rgba(255, 136, 0, 0.06) 0%, transparent 40%);
}

.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
.center-text { text-align: center; }

/* Navigation */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%; height: var(--header-height);
    z-index: 1000; transition: background-color 0.3s ease, border-color 0.3s ease;
    border-bottom: 1px solid transparent;
}
.navbar.scrolled { background-color: rgba(5, 5, 5, 0.95); border-bottom: 1px solid var(--border-color); }

.nav-container { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.nav-left { display: flex; align-items: center; flex-shrink: 0; width: 180px; }
.nav-center { flex: 1; display: flex; justify-content: center; }
.nav-right { display: flex; align-items: center; justify-content: flex-end; flex-shrink: 0; width: 200px; }

.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25rem; white-space: nowrap; }
.logo-icon { width: 32px; height: 32px; border-radius: 8px; object-fit: contain; }

.nav-menu {
    display: flex; gap: 8px; background: rgba(255, 255, 255, 0.03);
    padding: 6px; border-radius: 100px; border: 1px solid var(--border-color);
}
.nav-menu li { display: flex; align-items: center; }
.nav-menu a {
    font-size: 0.9rem; color: var(--text-secondary); font-weight: 500;
    padding: 6px 16px; border-radius: 100px; transition: all 0.2s; white-space: nowrap;
}
.nav-menu a:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.05); }

.nav-actions { display: flex; align-items: center; gap: 16px; }
.btn-text { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; white-space: nowrap; }
.btn-text:hover { color: var(--text-primary); }

.btn-primary {
    background: var(--primary-accent); color: white; padding: 8px 20px; border-radius: 100px;
    font-size: 0.9rem; font-weight: 600; transition: transform 0.2s, background 0.2s; white-space: nowrap;
}
.btn-primary:hover { transform: translateY(-1px); background: var(--secondary-accent); }

/* Hero */
.hero { padding-top: 160px; padding-bottom: 120px; }
.hero-container { display: flex; flex-direction: column; align-items: center; text-align: center; }

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px;
    background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border-color);
    border-radius: 100px; font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 32px;
}
.pulse-dot { width: 6px; height: 6px; background-color: #22c55e; border-radius: 50%; box-shadow: 0 0 8px rgba(34, 197, 94, 0.6); }

.hero-title { font-size: 5rem; line-height: 1.05; font-weight: 800; margin-bottom: 24px; letter-spacing: -0.04em; }
.text-gradient {
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.hero-description { font-size: 1.25rem; color: var(--text-secondary); max-width: 640px; margin-bottom: 48px; line-height: 1.6; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 100px; }

.btn-lg { padding: 14px 36px; font-size: 1.05rem; display: flex; align-items: center; gap: 10px; }
.btn-secondary {
    background: rgba(255, 255, 255, 0.03); color: var(--text-primary); border: 1px solid var(--border-color);
    border-radius: 100px; font-weight: 500; transition: background 0.2s;
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.08); }

/* Mockup */
.hero-visual-wrapper { width: 100%; max-width: 1080px; perspective: 1200px; }
.interface-mockup {
    background: #0f1012; border: 1px solid var(--border-color); border-radius: 16px;
    box-shadow: 0 0 0 1px #000, 0 40px 100px -20px rgba(0,0,0,0.5); overflow: hidden;
    position: relative; transform: rotateX(2deg);
}
.mockup-header {
    height: 44px; background: rgba(255, 255, 255, 0.02); border-bottom: 1px solid var(--border-subtle);
    display: flex; align-items: center; padding: 0 20px; gap: 20px;
}
.traffic-lights { display: flex; gap: 8px; }
.traffic-lights span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, 0.1); }
.mockup-tabs { display: flex; gap: 24px; margin-left: 20px; }
.mockup-tabs span { font-size: 0.8rem; color: var(--text-tertiary); }
.mockup-tabs span.active { color: var(--text-primary); }

.mockup-body { height: 500px; display: flex; }
.m-sidebar {
    width: 220px; border-right: 1px solid var(--border-subtle); padding: 20px;
    display: flex; flex-direction: column; gap: 8px; background: rgba(0,0,0,0.2);
}
.m-device {
    display: flex; align-items: center; gap: 12px; padding: 12px; border-radius: 10px;
    background: rgba(255,255,255,0.02);
}
.m-device.active { background: rgba(255, 102, 0, 0.1); border-left: 2px solid var(--primary-accent); }
.m-dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; flex-shrink: 0; }
.m-dot.off { background: var(--text-tertiary); }
.m-device-info { display: flex; flex-direction: column; }
.m-device-name { font-size: 0.85rem; color: var(--text-primary); }
.m-device-id { font-size: 0.7rem; color: var(--text-tertiary); }

.m-main { flex: 1; background: #080808; position: relative; display: flex; flex-direction: column; }
.m-toolbar {
    height: 48px; border-bottom: 1px solid var(--border-subtle); display: flex;
    align-items: center; padding: 0 20px; gap: 16px;
}
.m-tool { padding: 6px 14px; border-radius: 8px; font-size: 0.75rem; color: var(--text-tertiary); background: rgba(255,255,255,0.03); }
.m-tool.active { background: var(--primary-accent); color: white; }
.m-screen { flex: 1; display: flex; align-items: center; justify-content: center; }
.m-screen-inner {
    width: 85%; height: 85%; border-radius: 8px; background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 1px solid var(--border-color); display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.m-cursor { position: absolute; top: 35%; left: 55%; width: 16px; height: 16px; }
.m-cursor::before {
    content: ''; display: block; width: 0; height: 0;
    border-left: 8px solid var(--primary-accent); border-top: 5px solid transparent; border-bottom: 5px solid transparent;
    transform: rotate(-30deg);
}
.m-desktop-icons { position: absolute; top: 20px; left: 20px; display: flex; flex-direction: column; gap: 20px; }
.m-icon-item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.m-icon-box { width: 36px; height: 36px; border-radius: 8px; background: rgba(255,255,255,0.08); }
.m-icon-label { font-size: 0.6rem; color: rgba(255,255,255,0.5); }
.m-taskbar {
    position: absolute; bottom: 0; left: 0; right: 0; height: 36px;
    background: rgba(0,0,0,0.6); display: flex; align-items: center; padding: 0 12px; gap: 8px;
}
.m-taskbar-item { width: 28px; height: 28px; border-radius: 6px; background: rgba(255,255,255,0.08); }
.m-status { position: absolute; bottom: 8px; right: 20px; display: flex; align-items: center; gap: 8px; }
.m-latency { font-size: 0.7rem; color: #22c55e; background: rgba(34,197,94,0.1); padding: 3px 10px; border-radius: 100px; }

/* Stats */
.stats-bar {
    display: flex; justify-content: center; gap: 80px; padding: 80px 0;
    border-bottom: 1px solid var(--border-subtle);
}
.stat-item { text-align: center; }
.stat-number { font-size: 3rem; font-weight: 800; color: white; line-height: 1; margin-bottom: 8px; }
.stat-label { font-size: 0.85rem; color: var(--text-tertiary); }

.trusted-brands { margin-top: 80px; }
.trusted-brands p { font-size: 0.8rem; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.2em; margin-bottom: 32px; }
.brand-grid { display: flex; gap: 60px; justify-content: center; flex-wrap: wrap; opacity: 0.4; font-weight: 800; font-size: 1.3rem; }

/* Bento Grid */
.section { padding: 120px 0; }
.section-header { margin-bottom: 80px; }
.section-title { font-size: 3rem; font-weight: 700; margin-bottom: 20px; color: white; }
.section-subtitle { font-size: 1.1rem; color: var(--text-secondary); }

.bento-grid { display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(2, 320px); gap: 24px; }
.bento-card {
    background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg);
    position: relative; overflow: hidden; transition: transform 0.2s;
}
.bento-card:hover { transform: translateY(-4px); border-color: var(--border-highlight); }
.bento-card.span-2 { grid-column: span 2; }
.card-content { padding: 40px; height: 100%; display: flex; flex-direction: column; position: relative; z-index: 2; }
.card-content h3 { font-size: 1.5rem; margin-bottom: 16px; }
.card-content p { color: var(--text-secondary); line-height: 1.7; }
.card-icon {
    font-size: 2rem; margin-bottom: 24px; width: 60px; height: 60px; background: rgba(255, 102, 0, 0.08);
    border-radius: 16px; display: flex; align-items: center; justify-content: center; color: var(--primary-accent);
}
.feature-tags { display: flex; gap: 12px; margin-top: auto; flex-wrap: wrap; }
.feature-tags li { padding: 6px 14px; background: rgba(255,255,255,0.03); border-radius: 100px; font-size: 0.85rem; border: 1px solid var(--border-color); }

/* Solutions */
.split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.sol-tabs { display: flex; flex-direction: column; gap: 4px; }
.sol-btn {
    text-align: left; padding: 16px 24px; color: var(--text-secondary); font-size: 1.1rem;
    border-left: 2px solid transparent; width: 100%; background: none; font-family: inherit;
}
.sol-btn.active { color: var(--text-primary); border-left-color: var(--primary-accent); background: linear-gradient(90deg, rgba(255,102,0,0.1), transparent); }
.solution-card { background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 48px; }
.card-header { display: flex; justify-content: space-between; margin-bottom: 24px; align-items: center; }
.card-header h3 { font-size: 1.8rem; }
.badge { background: rgba(255,102,0,0.15); color: var(--primary-accent); padding: 6px 14px; border-radius: 100px; font-size: 0.8rem; font-weight: 600; }
.data-points { display: flex; gap: 60px; padding-top: 40px; border-top: 1px solid var(--border-color); margin-top: 40px; }
.point strong { display: block; font-size: 2.5rem; color: white; line-height: 1; margin-bottom: 8px; }
.point span { font-size: 0.85rem; color: var(--text-tertiary); }

/* CTA & Download */
.cta-section { position: relative; padding: 140px 0; overflow: hidden; }
.cta-title { font-size: 4rem; line-height: 1.1; margin-bottom: 24px; }
.cta-desc { font-size: 1.25rem; color: var(--text-secondary); }

.download-options { display: flex; gap: 24px; justify-content: center; margin-top: 60px; flex-wrap: wrap; }
.dl-card {
    display: flex; align-items: center; gap: 20px; background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color); padding: 24px 32px; border-radius: 20px;
    min-width: 280px; text-align: left; transition: all 0.2s; color: var(--text-primary); cursor: pointer;
}
.dl-card:hover { background: rgba(255, 255, 255, 0.08); border-color: var(--border-highlight); transform: translateY(-4px); }
.dl-icon { width: 40px; height: 40px; color: var(--text-primary); flex-shrink: 0; }
.dl-info { display: flex; flex-direction: column; flex: 1; }
.os-name { font-size: 1.1rem; font-weight: 600; margin-bottom: 4px; }
.os-ver { font-size: 0.8rem; color: var(--text-tertiary); }
.dl-arrow { color: var(--text-tertiary); font-size: 1.2rem; }

/* News Filter Tags */
.news-filter { margin-bottom: 40px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.filter-tag {
    padding: 8px 20px; border-radius: 100px; font-size: 0.85rem; font-weight: 500;
    background: rgba(255,255,255,0.03); border: 1px solid var(--border-color);
    color: var(--text-secondary); cursor: pointer; transition: all 0.2s;
}
.filter-tag.active, .filter-tag:hover { background: var(--primary-accent); color: white; border-color: var(--primary-accent); }

/* Blog Meta */
.blog-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.blog-tag {
    font-size: 0.7rem; font-weight: 600; padding: 3px 10px; border-radius: 100px;
    text-transform: uppercase; letter-spacing: 0.05em;
}
.tag-guide { background: rgba(34,197,94,0.15); color: #22c55e; }
.tag-product { background: rgba(59,130,246,0.15); color: #3b82f6; }
.tag-company { background: rgba(168,85,247,0.15); color: #a855f7; }
.tag-tips { background: rgba(251,191,36,0.15); color: #fbbf24; }

/* Blog Grid */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.blog-grid-2col { grid-template-columns: repeat(2, 1fr); }
.blog-card {
    background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg);
    padding: 32px; transition: all 0.2s ease;
}
.blog-card:hover { transform: translateY(-4px); border-color: var(--border-highlight); }
.blog-date { font-size: 0.85rem; color: var(--text-tertiary); margin-bottom: 12px; }
.blog-card h3 { font-size: 1.15rem; font-weight: 600; color: var(--text-primary); margin-bottom: 12px; line-height: 1.4; }
.blog-card p {
    font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px;
    display: -webkit-box; -webkit-line-clamp: 3; line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-link { font-size: 0.9rem; color: var(--primary-accent); font-weight: 500; transition: color 0.2s; }
.blog-link:hover { color: var(--secondary-accent); }

/* SEO Articles */
.seo-section {
    padding: 120px 0; border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle); background: rgba(255, 255, 255, 0.01);
}
.seo-section .section-title { font-size: 2.6rem; }
.seo-articles { display: grid; gap: 28px; }
.seo-article { background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 40px; }
.seo-article h1 { font-size: 1.9rem; margin-bottom: 16px; color: var(--text-primary); }
.seo-article h2 { font-size: 1.3rem; margin-top: 24px; margin-bottom: 8px; color: var(--text-primary); }
.seo-article h3 { font-size: 1.05rem; margin-top: 14px; margin-bottom: 6px; color: var(--text-secondary); }
.seo-article p { color: var(--text-secondary); margin-bottom: 10px; line-height: 1.75; }

.key-points, .steps-list { margin: 8px 0 14px; padding-left: 18px; color: var(--text-secondary); }
.key-points { list-style: disc; }
.steps-list { list-style: decimal; }
.key-points li, .steps-list li { margin-bottom: 6px; }

.faq-list {
    margin-top: 10px; border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
    padding: 16px; background: rgba(255, 255, 255, 0.02);
}
.faq-list dt { font-weight: 600; color: var(--text-primary); margin-top: 10px; }
.faq-list dd { color: var(--text-secondary); margin: 6px 0 10px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border-color); padding: 100px 0 60px; color: var(--text-tertiary); }
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 80px; flex-wrap: wrap; gap: 40px; }
.footer-brand p { margin-top: 12px; font-size: 0.9rem; }
.footer-nav-wrapper { display: flex; gap: 80px; flex-wrap: wrap; }
.footer-col h4 { color: white; margin-bottom: 24px; font-size: 1rem; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col a:hover { color: white; }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 30px; font-size: 0.85rem; text-align: center; }

/* Responsive */
@media (max-width: 1024px) {
    .nav-center { display: none; }
    .mobile-menu-toggle { display: block; }
    .hero-title { font-size: 3.5rem; }
}
@media (max-width: 900px) {
    .hero-title { font-size: 3rem; }
    .bento-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
    .bento-card.span-2 { grid-column: span 1; }
    .split-layout { grid-template-columns: 1fr; }
    .interface-mockup { transform: none; }
    .blog-grid, .blog-grid-2col { grid-template-columns: 1fr; }
    .stats-bar { flex-direction: column; gap: 40px; align-items: center; }
    .nav-left { width: auto; } .nav-right { width: auto; }
    .footer-top { flex-direction: column; }
    .footer-nav-wrapper { gap: 40px; width: 100%; justify-content: space-between; }
    .mockup-body { height: 350px; }
    .m-sidebar { display: none; }
}
@media (max-width: 600px) {
    .hero-title { font-size: 2.5rem; }
    .hero { padding-top: 120px; padding-bottom: 80px; }
    .footer-nav-wrapper { flex-direction: column; }
    .dl-card { width: 100%; }
    .download-options { flex-direction: column; align-items: center; }
    .data-points { flex-direction: column; gap: 24px; }
}

.mobile-menu-toggle { display: none; cursor: pointer; width: 24px; height: 24px; position: relative; }
.mobile-menu-toggle span { display: block; width: 100%; height: 2px; background-color: var(--text-primary); position: absolute; left: 0; transition: all 0.3s; }
.mobile-menu-toggle span:first-child { top: 6px; }
.mobile-menu-toggle span:last-child { bottom: 6px; }