/* ZENITH PULSE — Apple-inspired minimal */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: #fff;
    color: #1d1d1f;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: #06c;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.08);
}
.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 48px;
}
.nav-brand {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1d1d1f;
    letter-spacing: -0.01em;
}
.nav-links a {
    margin-left: 32px;
    font-size: 0.8rem;
    color: #6e6e73;
    letter-spacing: 0.01em;
    font-weight: 400;
}
.nav-links a:hover {
    color: #1d1d1f;
    text-decoration: none;
}

/* Hero */
.hero {
    padding: 160px 0 80px;
    text-align: center;
}
.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: #1d1d1f;
    line-height: 1.1;
}
.hero h1 span {
    color: #86868b;
    font-weight: 400;
}
.hero p {
    font-size: 1.3rem;
    color: #86868b;
    font-weight: 400;
    margin-top: 12px;
    letter-spacing: -0.01em;
}

/* Section titles */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 60px;
    color: #1d1d1f;
}

/* Product */
.product-section {
    padding: 80px 0;
    background: #fbfbfd;
}
.product-card {
    display: flex;
    gap: 64px;
    align-items: center;
    background: #fff;
    border-radius: 18px;
    padding: 48px 56px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.03);
}
.product-card .icon {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #fff;
}
.product-info h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: #1d1d1f;
}
.product-info .cn-name {
    font-size: 1.1rem;
    color: #86868b;
    font-weight: 400;
    margin-bottom: 6px;
}
.product-info .tagline {
    font-size: 1.05rem;
    color: #6e6e73;
    margin-bottom: 20px;
    line-height: 1.5;
}
.platform-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}
.platform-tags span {
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    background: #f5f5f7;
    color: #6e6e73;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 11px 28px;
    border-radius: 24px;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: all 0.2s;
}
.btn-primary {
    background: #1d1d1f;
    color: #fff;
}
.btn-primary:hover {
    background: #000;
    color: #fff;
    text-decoration: none;
}
.btn-outline {
    border: 1px solid #1d1d1f;
    color: #1d1d1f;
    margin-left: 12px;
}
.btn-outline:hover {
    background: #1d1d1f;
    color: #fff;
    text-decoration: none;
}

/* Features */
.features-section {
    padding: 100px 0;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px 60px;
}
.feature-item h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}
.feature-item p {
    font-size: 0.95rem;
    color: #86868b;
    line-height: 1.6;
}

/* Download */
.download-section {
    padding: 100px 0;
    background: #fbfbfd;
}
.download-list {
    max-width: 680px;
    margin: 0 auto;
}
.download-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fff;
    border-radius: 14px;
    padding: 20px 32px;
    margin-bottom: 12px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.download-card .platform {
    font-weight: 600;
    font-size: 1rem;
    color: #1d1d1f;
}
.download-card .meta {
    font-size: 0.82rem;
    color: #86868b;
    margin-top: 2px;
}
.download-card .btn {
    padding: 8px 20px;
    font-size: 0.8rem;
}

/* Content pages */
.content-page {
    padding: 120px 0 80px;
    max-width: 680px;
}
.content-page h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: #1d1d1f;
    margin-bottom: 8px;
}
.content-page .last-updated {
    font-size: 0.85rem;
    color: #86868b;
    margin-bottom: 40px;
}
.content-page h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1d1d1f;
    margin: 40px 0 12px;
    letter-spacing: -0.01em;
}
.content-page p {
    font-size: 0.95rem;
    color: #4d4d56;
    line-height: 1.7;
    margin-bottom: 8px;
}
.content-page ul {
    padding-left: 20px;
    margin-bottom: 8px;
}
.content-page li {
    font-size: 0.95rem;
    color: #4d4d56;
    line-height: 1.7;
}

/* Footer */
.footer {
    padding: 32px 0;
    background: #fbfbfd;
    border-top: 1px solid rgba(0,0,0,0.06);
    text-align: center;
}
.footer a {
    color: #6e6e73;
    font-size: 0.78rem;
    margin: 0 14px;
}
.footer a:hover {
    color: #1d1d1f;
    text-decoration: none;
}
.footer .icp {
    margin-top: 14px;
}
.footer .icp a {
    font-size: 0.72rem;
    color: #aeaeb2;
    margin: 0;
}
.footer .icp a:hover {
    color: #1d1d1f;
}
.footer .copyright {
    color: #aeaeb2;
    font-size: 0.72rem;
    margin-top: 4px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero { padding: 120px 0 60px; }
    .hero h1 { font-size: 2.2rem; }
    .product-card { flex-direction: column; gap: 32px; padding: 32px; text-align: center; }
    .platform-tags { justify-content: center; }
    .section-title { font-size: 1.8rem; }
}