/* 企业 PC 客户端下载页，安全可信 CSS */
:root {
    --primary-color: #005A9E; /* 权威企业蓝 */
    --primary-hover: #004578;
    --secondary-color: #0078D4;
    --bg-main: #F3F4F6;
    --bg-white: #FFFFFF;
    --text-dark: #1A1A1A;
    --text-muted: #605E5C;
    --border-color: #E1DFDD;
    --success-color: #107C10; /* 代表安全可信的绿色 */
    --radius-md: 4px; /* 偏直角，更显专业严谨 */
    --radius-lg: 8px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
    --transition: all 0.2s ease-in-out;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

/* 按钮样式 - 严谨、安全感 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-align: center;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
}

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

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 90, 158, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 8px rgba(0, 90, 158, 0.3);
}

.btn-outline {
    background-color: var(--bg-white);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: #F3F9FD;
}

/* 导航栏 */
.modern-nav {
    position: sticky;
    top: 0;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 16px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 28px;
}

.nav-menu a {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

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

/* Hero Section - 突出安全可信与PC端 */
.modern-hero {
    background: linear-gradient(180deg, #FFFFFF 0%, #F3F4F6 100%);
    padding: 80px 0;
    border-bottom: 1px solid var(--border-color);
}

.page-hero {
    padding: 60px 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background-color: #EAF3EB;
    color: var(--success-color);
    border: 1px solid #C3E1C5;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-size: 40px;
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.hero-desc {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.7;
}

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

.hero-meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    gap: 16px;
}

.hero-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.hero-img-wrapper {
    background: var(--bg-white);
    padding: 8px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.hero-img {
    width: 100%;
    border-radius: var(--radius-md);
    display: block;
}

/* Data Section */
.modern-data {
    padding: 40px 0;
    background-color: var(--primary-color);
    color: #fff;
}

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

.data-num {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 4px;
}

.data-label {
    font-size: 14px;
    opacity: 0.9;
}

/* Features */
.modern-features {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background-color: var(--bg-main);
    padding: 32px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-color);
    background-color: var(--bg-white);
}

.f-icon {
    width: 48px;
    height: 48px;
    background-color: #EBF3FC;
    color: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    font-weight: 600;
}

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

/* Solutions */
.modern-solutions {
    padding: 80px 0;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.solution-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.card-img-wrap {
    height: 180px;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.card-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.solution-card:hover .card-img-wrap img {
    transform: scale(1.03);
}

.s-content {
    padding: 24px;
}

.s-content h3 {
    font-size: 18px;
    margin-bottom: 8px;
    font-weight: 600;
}

.s-content p {
    font-size: 14px;
    color: var(--text-muted);
}

/* CTA */
.modern-cta {
    padding: 60px 0;
    background-color: var(--bg-white);
    border-top: 1px solid var(--border-color);
}

.cta-box {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 60px 40px;
    border-radius: var(--radius-lg);
    text-align: center;
    background-image: url('data:image/svg+xml;utf8,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><path d="M54.627 15.469L31.627 2.135C30.621 1.553 29.379 1.553 28.373 2.135L5.373 15.469C4.367 16.051 3.746 17.127 3.746 18.292V41.708C3.746 42.873 4.367 43.949 5.373 44.531L28.373 57.865C29.379 58.447 30.621 58.447 31.627 57.865L54.627 44.531C55.633 43.949 56.254 42.873 56.254 41.708V18.292C56.254 17.127 55.633 16.051 54.627 15.469ZM30 55.192L6.254 41.423V18.577L30 4.808L53.746 18.577V41.423L30 55.192Z" fill="rgba(255,255,255,0.05)"/></svg>');
    background-repeat: no-repeat;
    background-position: right -20px top -20px;
    background-size: 200px;
}

.cta-box h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-box p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 32px;
}

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

/* Download Page Specific */
.download-section {
    padding: 60px 0 80px;
    background-color: var(--bg-main);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.dl-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px 24px;
    text-align: center;
    transition: var(--transition);
}

.dl-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.dl-card.highlight {
    border: 2px solid var(--primary-color);
    position: relative;
}

.dl-card.highlight::before {
    content: '🛡️ 官方安全认证';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--success-color);
    color: #fff;
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 600;
}

.d-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.dl-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 600;
}

.dl-card p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
    min-height: 42px;
}

/* FAQ Section */
.faq-section {
    padding: 60px 0;
    background-color: var(--bg-white);
}

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

.faq-item {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.faq-item h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-dark);
    font-weight: 600;
}

.faq-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Footer */
.modern-footer {
    background-color: #1A1A1A;
    color: #D2D0CE;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo-text {
    color: #ffffff;
}

.footer-brand p {
    margin-top: 12px;
    font-size: 13px;
    color: #A19F9D;
}

.footer-links h4 {
    font-size: 14px;
    margin-bottom: 20px;
    font-weight: 600;
    color: #ffffff;
}

.footer-links a {
    display: block;
    color: #A19F9D;
    font-size: 13px;
    margin-bottom: 12px;
}

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

.footer-bottom {
    border-top: 1px solid #323130;
    padding-top: 20px;
    text-align: center;
    font-size: 12px;
    color: #A19F9D;
}

@media (max-width: 900px) {
    .hero-grid, .data-grid, .features-grid, .solutions-grid, .download-grid, .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .nav-menu { display: none; }
    .hero-actions, .cta-actions { flex-direction: column; }
}