/* WPS Corporate Official Style */
:root {
    --wps-red: #D93025;
    --wps-red-hover: #b9251b;
    --text-primary: #1f1f1f;
    --text-secondary: #666666;
    --bg-white: #ffffff;
    --bg-gray: #f5f5f7;
    --border-color: #e0e0e0;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.5;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 48px;
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--wps-red);
    text-decoration: none;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: var(--text-primary);
    font-weight: 400;
    font-size: 18px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 15px;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--wps-red);
}

.btn {
    padding: 8px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--wps-red);
    color: white;
}

.btn-primary:hover {
    background: var(--wps-red-hover);
}

.btn-outline {
    background: transparent;
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--bg-gray);
}

/* Hero Section */
.hero {
    padding: 100px 48px;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-tag {
    color: var(--wps-red);
    font-weight: 600;
    margin-bottom: 24px;
    display: inline-block;
    background: #fdecea;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
}

.hero-title {
    font-size: 56px;
    line-height: 1.1;
    margin-bottom: 24px;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero-desc {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.hero-btn {
    padding: 14px 40px;
    font-size: 16px;
    border-radius: 30px;
}

/* Feature Grid */
.features {
    padding: 80px 48px;
    background: var(--bg-gray);
}

.feature-header {
    text-align: center;
    margin-bottom: 64px;
}

.feature-title {
    font-size: 32px;
    margin-bottom: 16px;
}

.feature-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: #fff;
    padding: 32px;
    border-radius: 12px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.08);
}

.card-icon {
    font-size: 32px;
    margin-bottom: 24px;
    color: var(--wps-red);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Download Section */
.download-section {
    padding: 100px 48px;
    text-align: center;
    background: #fff;
}

.dl-box {
    max-width: 800px;
    margin: 0 auto;
}

.platform-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 48px;
}

.platform-item {
    text-align: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.platform-item:hover {
    color: var(--wps-red);
}

.platform-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

/* Footer */
.footer {
    padding: 64px 48px;
    background: #fafafa;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-col h4 {
    color: var(--text-primary);
    margin-bottom: 24px;
    font-size: 14px;
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 12px;
}

.footer-col a:hover {
    color: var(--wps-red);
}

.copyright {
    text-align: center;
    margin-top: 64px;
    color: #999;
    font-size: 12px;
}

@media (max-width: 1024px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
    .hero-title { font-size: 40px; }
}

@media (max-width: 768px) {
    .grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: repeat(2, 1fr); }
    .nav-links { display: none; }
}