/* 企业云服务品牌风，专业可信 CSS */
:root {
    --cloud-blue: #165DFF; /* 专业的云服务蓝 */
    --cloud-blue-hover: #0E42D2;
    --cloud-dark: #0A1629; /* 深邃科技背景 */
    --text-main: #1D2129;
    --text-sub: #4E5969;
    --bg-light: #F7F8FA;
    --border-color: #E5E6EB;
    --radius: 6px;
    --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    color: var(--text-main);
    line-height: 1.6;
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 24px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius);
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.btn-lg {
    padding: 12px 32px;
    font-size: 16px;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-primary {
    background-color: var(--cloud-blue);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--cloud-blue-hover);
    box-shadow: 0 4px 12px rgba(22, 93, 255, 0.3);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--cloud-blue);
    color: var(--cloud-blue);
}

.btn-outline:hover {
    background-color: #F0F5FF;
}

.btn-outline-white {
    background-color: transparent;
    border-color: rgba(255,255,255,0.5);
    color: #fff;
}

.btn-outline-white:hover {
    background-color: rgba(255,255,255,0.1);
    border-color: #fff;
}

/* Navbar */
.cloud-nav {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 28px;
    height: 28px;
    background-color: var(--cloud-blue);
    border-radius: 6px;
}

.brand-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-menu a {
    font-size: 15px;
    color: var(--text-sub);
    font-weight: 500;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--cloud-blue);
}

/* Hero Section */
.cloud-hero {
    background-color: var(--cloud-dark);
    background-image: radial-gradient(circle at 80% 20%, rgba(22, 93, 255, 0.15) 0%, transparent 50%);
    color: #fff;
    padding: 100px 0;
    overflow: hidden;
}

.page-hero {
    padding: 70px 0;
}

.hero-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.hero-content h1 {
    font-size: 48px;
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 16px;
    color: #A9B2C2;
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.shadow-img {
    width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255,255,255,0.05);
}

/* Data Section */
.cloud-data {
    background-color: #fff;
    padding: 48px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.data-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--cloud-blue);
    margin-bottom: 8px;
    font-family: Arial, sans-serif;
}

.data-label {
    font-size: 14px;
    color: var(--text-sub);
}

/* Features */
.cloud-features {
    padding: 100px 0;
    background-color: var(--bg-light);
}

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

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.section-header p {
    font-size: 16px;
    color: var(--text-sub);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background-color: #fff;
    padding: 40px 32px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: transparent;
}

.icon-wrapper {
    font-size: 36px;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.7;
}

/* Solutions */
.cloud-solutions {
    padding: 100px 0;
    background-color: #fff;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.solution-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.solution-card:hover {
    box-shadow: var(--shadow-sm);
}

.solution-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

.solution-content {
    padding: 32px;
}

.solution-content h3 {
    font-size: 20px;
    margin-bottom: 16px;
    font-weight: 600;
}

.solution-content p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.7;
}

/* CTA */
.cloud-cta {
    background-color: var(--bg-light);
    padding: 80px 0;
}

.cta-wrapper {
    background-color: var(--cloud-blue);
    background-image: linear-gradient(135deg, #165DFF 0%, #0E42D2 100%);
    color: #fff;
    padding: 72px 40px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.cta-wrapper h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-wrapper p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.cta-actions .btn-primary {
    background-color: #fff;
    color: var(--cloud-blue);
}

.cta-actions .btn-primary:hover {
    background-color: #F7F8FA;
}

/* Download Page */
.download-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.download-card {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 48px 32px;
    text-align: center;
    transition: box-shadow 0.3s ease;
}

.download-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.d-icon {
    font-size: 56px;
    margin-bottom: 24px;
}

.download-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    font-weight: 600;
}

.download-card p {
    color: var(--text-sub);
    font-size: 14px;
    margin-bottom: 32px;
    min-height: 48px;
}

/* FAQ Section */
.faq-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: #fff;
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    transition: box-shadow 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-main);
    font-weight: 600;
}

.faq-item p {
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.7;
}

/* Footer */
.cloud-footer {
    background-color: var(--cloud-dark);
    color: #fff;
    padding: 80px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    color: #86909C;
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 16px;
    margin-bottom: 24px;
    font-weight: 600;
    color: #fff;
}

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

.footer-links a {
    display: block;
    color: #86909C;
    font-size: 14px;
    margin-bottom: 16px;
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: #4E5969;
}

@media (max-width: 900px) {
    .hero-layout, .data-grid, .features-grid, .solutions-grid, .download-grid, .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .nav-menu { display: none; }
    .hero-buttons { flex-direction: column; }
    .cta-actions { flex-direction: column; }
}