:root {
    --zoom-blue: #0B5CFF;
    --zoom-blue-hover: #0044CC;
    --zoom-blue-light: #E8F0FF;
    --zoom-dark: #000511;
    --zoom-text-primary: #232333;
    --zoom-text-secondary: #6E7680;
    --zoom-bg-gray: #FFF9F0;
    --zoom-white: #FFFCF7;
    --zoom-border: #F0E6D2;
    --zoom-shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --zoom-shadow-md: 0 12px 24px rgba(0,0,0,0.08);
    --font-inter: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-inter);
    color: var(--zoom-text-primary);
    background-color: var(--zoom-white);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* --- 官方导航栏 (Header) --- */
.zoom-official-header {
    position: sticky;
    top: 0;
    width: 100%;
    background: var(--zoom-white);
    z-index: 2000;
    border-bottom: 1px solid var(--zoom-border);
}

.header-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-logo svg {
    height: 28px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--zoom-text-primary);
    font-weight: 600;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-ghost {
    padding: 10px 16px;
    text-decoration: none;
    color: var(--zoom-text-primary);
    font-weight: 600;
    font-size: 15px;
}

.btn-outline {
    padding: 10px 24px;
    border: 1.5px solid var(--zoom-blue);
    border-radius: 50px;
    color: var(--zoom-blue);
    text-decoration: none;
    font-weight: 700;
    font-size: 15px;
}

.btn-primary {
    padding: 10px 24px;
    background: var(--zoom-blue);
    color: var(--zoom-white);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 15px;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: var(--zoom-blue-hover);
}

/* --- Hero 区域 --- */
.hero-section {
    padding: 80px 24px;
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-visual {
    flex: 1.2;
}

.hero-tag {
    color: var(--zoom-blue);
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 16px;
    display: block;
}

.hero-title {
    font-size: 64px;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--zoom-text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* --- 产品网格 (Product Grid) --- */
.products-section {
    padding: 100px 24px;
    background: var(--zoom-bg-gray);
}

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

.section-title {
    text-align: center;
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 60px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--zoom-white);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--zoom-border);
    transition: all 0.3s;
    text-decoration: none;
    color: inherit;
}

.product-card:hover {
    box-shadow: var(--zoom-shadow-md);
    transform: translateY(-4px);
    border-color: var(--zoom-blue);
}

.product-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 24px;
}

.product-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.product-card p {
    color: var(--zoom-text-secondary);
    font-size: 15px;
}

/* --- 底部 (Footer) --- */
.zoom-official-footer {
    background: var(--zoom-dark);
    color: var(--zoom-white);
    padding: 80px 24px 40px;
}

.footer-container {
    max-width: 1440px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: 48px;
    margin-bottom: 80px;
}

.footer-logo {
    margin-bottom: 32px;
}

.footer-col h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
    opacity: 0.5;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--zoom-white);
    text-decoration: none;
    font-size: 14px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.footer-col a:hover {
    opacity: 1;
    color: var(--zoom-blue);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    opacity: 0.6;
}

/* --- 下载页专用 --- */
.download-hero {
    background: var(--zoom-bg-gray);
    padding: 80px 24px;
    text-align: center;
}

.download-card {
    max-width: 800px;
    margin: -40px auto 80px;
    background: var(--zoom-white);
    padding: 60px;
    border-radius: 24px;
    box-shadow: var(--zoom-shadow-md);
    text-align: center;
}

/* --- 响应式调整 --- */
@media (max-width: 1024px) {
    .hero-section { flex-direction: column; text-align: center; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-menu, .nav-right .btn-outline { display: none; }
    .hero-title { font-size: 40px; }
    .product-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 20px; text-align: center; }
}