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

html {
scroll-behavior: smooth;
}

body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
background-color: #070b14;
color: #c8d1e0;
line-height: 1.7;
}

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

.container {
max-width: 1200px;
margin: 0 auto;
padding: 0 20px;
}

.header {
position: fixed;
top: 0;
left: 0;
width: 100%;
background: rgba(7, 11, 20, 0.92);
backdrop-filter: blur(12px);
border-bottom: 1px solid rgba(0, 212, 255, 0.1);
z-index: 1000;
padding: 16px 0;
}

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

.logo {
font-size: 24px;
font-weight: 800;
color: #00d4ff;
letter-spacing: 1px;
}

.nav {
display: flex;
gap: 36px;
}

.nav a {
font-size: 15px;
font-weight: 500;
color: #a0aec0;
transition: color 0.3s;
}

.nav a:hover {
color: #00d4ff;
}

.menu-toggle {
display: none;
background: none;
border: none;
color: #00d4ff;
font-size: 24px;
cursor: pointer;
}

.hero {
padding: 160px 0 100px;
text-align: center;
background: radial-gradient(ellipse at center top, #0a1f3d 0%, #070b14 70%);
position: relative;
overflow: hidden;
}

.hero::before {
content: "";
position: absolute;
top: -50%;
left: -50%;
width: 200%;
height: 200%;
background: radial-gradient(circle, rgba(0, 212, 255, 0.06) 0%, transparent 60%);
animation: pulse 6s ease-in-out infinite;
}

@keyframes pulse {
0%, 100% { transform: scale(1); opacity: 0.6; }
50% { transform: scale(1.1); opacity: 1; }
}

.hero .container {
position: relative;
z-index: 2;
}

.hero h1 {
font-size: 48px;
font-weight: 800;
color: #ffffff;
line-height: 1.2;
margin-bottom: 24px;
background: linear-gradient(135deg, #00d4ff, #0066ff);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
}

.hero-sub {
font-size: 18px;
color: #94a3b8;
max-width: 780px;
margin: 0 auto 40px;
}

.hero-btns {
display: flex;
gap: 20px;
justify-content: center;
margin-bottom: 60px;
}

.btn {
display: inline-block;
padding: 14px 36px;
border-radius: 8px;
font-size: 16px;
font-weight: 600;
cursor: pointer;
border: none;
transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
transform: translateY(-2px);
}

.btn-primary {
background: linear-gradient(135deg, #00d4ff, #0066ff);
color: #ffffff;
box-shadow: 0 4px 20px rgba(0, 212, 255, 0.35);
}

.btn-secondary {
background: transparent;
color: #00d4ff;
border: 2px solid #00d4ff;
}

.hero-stats {
display: flex;
justify-content: center;
gap: 60px;
flex-wrap: wrap;
}

.stat-item {
text-align: center;
}

.stat-num {
display: block;
font-size: 36px;
font-weight: 800;
color: #00d4ff;
}

.stat-label {
font-size: 14px;
color: #64748b;
margin-top: 4px;
}

.download-section {
padding: 100px 0;
background: #0a0f1c;
}

.download-section h2 {
font-size: 36px;
color: #ffffff;
text-align: center;
margin-bottom: 16px;
}

.section-desc {
text-align: center;
color: #94a3b8;
max-width: 760px;
margin: 0 auto 60px;
font-size: 16px;
}

.download-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
gap: 30px;
margin-bottom: 60px;
}

.download-card {
background: linear-gradient(145deg, #0f172a, #1e293b);
border: 1px solid rgba(0, 212, 255, 0.12);
border-radius: 16px;
padding: 40px 30px;
text-align: center;
transition: transform 0.3s, border-color 0.3s;
}

.download-card:hover {
transform: translateY(-6px);
border-color: rgba(0, 212, 255, 0.4);
}

.download-icon {
font-size: 56px;
margin-bottom: 16px;
}

.download-card h3 {
font-size: 22px;
color: #ffffff;
margin-bottom: 12px;
}

.download-card p {
color: #94a3b8;
font-size: 15px;
margin-bottom: 24px;
}

.download-tips {
background: rgba(0, 212, 255, 0.05);
border: 1px solid rgba(0, 212, 255, 0.15);
border-radius: 12px;
padding: 30px;
}

.download-tips h3 {
color: #00d4ff;
margin-bottom: 10px;
font-size: 18px;
}

.download-tips p {
color: #94a3b8;
font-size: 15px;
}

.products {
padding: 100px 0;
background: #070b14;
}

.products h2 {
font-size: 36px;
color: #ffffff;
text-align: center;
margin-bottom: 16px;
}

.product-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
gap: 30px;
}

.product-card {
background: linear-gradient(145deg, #0f172a, #1e293b);
border: 1px solid rgba(0, 212, 255, 0.08);
border-radius: 16px;
padding: 36px 30px;
transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
transform: translateY(-6px);
box-shadow: 0 12px 40px rgba(0, 212, 255, 0.1);
}

.product-icon {
font-size: 40px;
margin-bottom: 16px;
}

.product-card h3 {
font-size: 20px;
color: #ffffff;
margin-bottom: 12px;
}

.product-card p {
color: #94a3b8;
font-size: 15px;
margin-bottom: 18px;
}

.product-card ul {
list-style: none;
}

.product-card ul li {
color: #cbd5e1;
font-size: 14px;
padding: 6px 0;
padding-left: 20px;
position: relative;
}

.product-card ul li::before {
content: "✓";
position: absolute;
left: 0;
color: #00d4ff;
font-weight: bold;
}

.news {
padding: 100px 0;
background: #0a0f1c;
}

.news h2 {
font-size: 36px;
color: #ffffff;
text-align: center;
margin-bottom: 16px;
}

.news-list {
display: flex;
flex-direction: column;
gap: 24px;
max-width: 900px;
margin: 0 auto;
}

.news-item {
background: linear-gradient(145deg, #0f172a, #1e293b);
border: 1px solid rgba(0, 212, 255, 0.08);
border-radius: 14px;
padding: 28px 32px;
transition: border-color 0.3s;
}

.news-item:hover {
border-color: rgba(0, 212, 255, 0.3);
}

.news-meta {
display: flex;
align-items: center;
gap: 16px;
margin-bottom: 12px;
}

.news-tag {
background: rgba(0, 212, 255, 0.12);
color: #00d4ff;
font-size: 12px;
font-weight: 600;
padding: 4px 12px;
border-radius: 20px;
}

.news-meta time {
color: #64748b;
font-size: 13px;
}

.news-item h3 {
font-size: 20px;
color: #f1f5f9;
margin-bottom: 10px;
}

.news-item p {
color: #94a3b8;
font-size: 15px;
margin-bottom: 14px;
line-height: 1.7;
}

.news-item a {
color: #00d4ff;
font-weight: 600;
font-size: 14px;
}

.about {
padding: 100px 0;
background: #070b14;
}

.about h2 {
font-size: 36px;
color: #ffffff;
text-align: center;
margin-bottom: 60px;
}

.about-content {
display: grid;
grid-template-columns: 1.2fr 1fr;
gap: 60px;
align-items: start;
}

.about-text p {
color: #94a3b8;
margin-bottom: 18px;
font-size: 15px;
}

.about-text h3 {
color: #00d4ff;
font-size: 20px;
margin: 30px 0 14px;
}

.about-text ul {
list-style: none;
}

.about-text ul li {
color: #cbd5e1;
font-size: 15px;
padding: 8px 0;
padding-left: 22px;
position: relative;
}

.about-text ul li::before {
content: "▸";
position: absolute;
left: 0;
color: #00d4ff;
}

.about-highlights {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}

.highlight-box {
background: linear-gradient(145deg, #0f172a, #1e293b);
border: 1px solid rgba(0, 212, 255, 0.1);
border-radius: 14px;
padding: 28px;
text-align: center;
}

.highlight-icon {
font-size: 36px;
margin-bottom: 12px;
}

.highlight-box h4 {
color: #ffffff;
font-size: 16px;
margin-bottom: 8px;
}

.highlight-box p {
color: #94a3b8;
font-size: 13px;
line-height: 1.6;
}

.contact {
padding: 100px 0;
background: #0a0f1c;
}

.contact h2 {
font-size: 36px;
color: #ffffff;
text-align: center;
margin-bottom: 16px;
}

.contact-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 50px;
margin-top: 50px;
}

.contact-info {
display: flex;
flex-direction: column;
gap: 24px;
}

.contact-item {
display: flex;
gap: 18px;
align-items: flex-start;
}

.contact-icon {
font-size: 28px;
width: 50px;
height: 50px;
display: flex;
align-items: center;
justify-content: center;
background: rgba(0, 212, 255, 0.1);
border-radius: 12px;
flex-shrink: 0;
}

.contact-detail h4 {
color: #ffffff;
font-size: 16px;
margin-bottom: 6px;
}

.contact-detail p {
color: #94a3b8;
font-size: 14px;
}

.contact-form-wrap {
background: linear-gradient(145deg, #0f172a, #1e293b);
border: 1px solid rgba(0, 212, 255, 0.1);
border-radius: 16px;
padding: 36px;
}

.contact-form-wrap h3 {
color: #00d4ff;
font-size: 20px;
margin-bottom: 24px;
}

.form-row {
display: flex;
gap: 16px;
margin-bottom: 16px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
width: 100%;
padding: 12px 16px;
background: rgba(255, 255, 255, 0.05);
border: 1px solid rgba(255, 255, 255, 0.1);
border-radius: 8px;
color: #e2e8f0;
font-size: 14px;
outline: none;
transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
border-color: #00d4ff;
}

.contact-form textarea {
resize: vertical;
margin-bottom: 16px;
}

.footer {
background: #05080f;
border-top: 1px solid rgba(0, 212, 255, 0.08);
padding: 60px 0 30px;
}

.footer-top {
display: grid;
grid-template-columns: 1.5fr 2fr;
gap: 60px;
margin-bottom: 40px;
}

.footer-brand .logo {
display: inline-block;
margin-bottom: 16px;
}

.footer-brand p {
color: #64748b;
font-size: 14px;
line-height: 1.7;
max-width: 340px;
}

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

.footer-col h4 {
color: #e2e8f0;
font-size: 15px;
margin-bottom: 16px;
}

.footer-col a {
display: block;
color: #64748b;
font-size: 14px;
padding: 6px 0;
transition: color 0.3s;
}

.footer-col a:hover {
color: #00d4ff;
}

.footer-bottom {
border-top: 1px solid rgba(255, 255, 255, 0.05);
padding-top: 24px;
text-align: center;
}

.footer-bottom p {
color: #475569;
font-size: 13px;
margin-bottom: 6px;
}

@media (max-width: 960px) {
.nav {
display: none;
position: absolute;
top: 64px;
left: 0;
width: 100%;
background: rgba(7, 11, 20, 0.98);
flex-direction: column;
padding: 20px;
gap: 16px;
border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.nav.active {
display: flex;
}

.menu-toggle {
display: block;
}

.hero h1 {
font-size: 32px;
}

.hero-stats {
gap: 30px;
}

.about-content,
.contact-grid,
.footer-top {
grid-template-columns: 1fr;
}

.footer-links {
grid-template-columns: 1fr 1fr;
}
}

@media (max-width: 640px) {
.hero h1 {
font-size: 26px;
}

.hero-btns {
flex-direction: column;
align-items: center;
}

.stat-num {
font-size: 28px;
}

.about-highlights {
grid-template-columns: 1fr;
}

.form-row {
flex-direction: column;
}
}