/* PC 软件安装引导风 CSS */
:root {
    --win-blue: #0078D4;
    --win-blue-hover: #005A9E;
    --win-light: #F3F2F1;
    --win-gray: #EDEBE9;
    --win-dark: #201F1E;
    --text-main: #323130;
    --text-sub: #605E5C;
    --text-light: #A19F9D;
    --bg-white: #FFFFFF;
    --border-color: #E1DFDD;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --shadow-window: 0 6.4px 14.4px 0 rgba(0, 0, 0, 0.132), 0 1.2px 3.6px 0 rgba(0, 0, 0, 0.108);
    --shadow-btn: 0 2px 4px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease;
}

* {
    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-main);
    line-height: 1.6;
    background-color: var(--win-light);
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

/* 按钮样式 - 类似 PC 安装向导按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 24px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
}

.btn-lg {
    padding: 12px 40px;
    font-size: 16px;
}

.btn-primary {
    background-color: var(--win-blue);
    color: #ffffff;
    border-color: var(--win-blue);
    box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
    background-color: var(--win-blue-hover);
    border-color: var(--win-blue-hover);
}

.btn-outline {
    background-color: var(--bg-white);
    border-color: #8A8886;
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: var(--win-light);
    border-color: var(--text-sub);
}

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

/* 导航栏 - 简洁系统风 */
.pc-nav {
    position: sticky;
    top: 0;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 2px 4px 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: 28px;
    height: 28px;
    background-color: var(--win-blue);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 14px;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
}

.nav-menu {
    display: flex;
    gap: 28px;
}

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

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

/* Hero 首屏 - 软件安装引导风 */
.pc-hero {
    padding: 60px 0;
    background: linear-gradient(180deg, #FFFFFF 0%, var(--win-light) 100%);
    border-bottom: 1px solid var(--border-color);
}

.page-hero {
    padding: 40px 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.install-box {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px;
    box-shadow: var(--shadow-window);
}

.install-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--win-gray);
}

.install-header .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 20px;
}

.install-header h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-main);
}

.hero-content h2 {
    font-size: 32px;
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.hero-desc {
    font-size: 16px;
    color: var(--text-sub);
    margin-bottom: 32px;
    line-height: 1.6;
}

.install-steps {
    margin-bottom: 32px;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--text-sub);
}

.step-icon {
    color: var(--win-blue);
    font-weight: bold;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.hero-meta {
    font-size: 12px;
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hero-visual .hero-img {
    width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-window);
    border: 1px solid var(--border-color);
}

/* 数据背书区 */
.pc-data {
    padding: 40px 0;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

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

.data-num {
    font-size: 32px;
    font-weight: 600;
    color: var(--win-blue);
    margin-bottom: 4px;
}

.data-label {
    font-size: 13px;
    color: var(--text-sub);
}

/* 通用区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 15px;
    color: var(--text-sub);
}

/* 核心功能区 */
.pc-features {
    padding: 80px 0;
    background-color: var(--win-light);
}

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

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

.feature-card:hover {
    box-shadow: var(--shadow-window);
    border-color: var(--win-blue);
}

.f-icon {
    width: 40px;
    height: 40px;
    background-color: #E1DFDD;
    color: var(--win-blue);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-sub);
    font-size: 13px;
    line-height: 1.6;
}

/* 行业解决方案区 */
.pc-solutions {
    padding: 80px 0;
    background-color: var(--bg-white);
    border-top: 1px solid var(--border-color);
}

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

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

.s-img {
    height: 160px;
    overflow: hidden;
}

.s-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.s-content {
    padding: 20px;
}

.s-content h3 {
    font-size: 16px;
    margin-bottom: 8px;
    font-weight: 600;
}

.s-content p {
    font-size: 13px;
    color: var(--text-sub);
}

/* 底部 CTA */
.pc-cta {
    padding: 60px 0;
    background-color: var(--win-dark);
    color: #ffffff;
    text-align: center;
}

.pc-cta h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 16px;
}

.pc-cta p {
    font-size: 15px;
    opacity: 0.9;
    margin-bottom: 32px;
}

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

.btn-white {
    background-color: #ffffff;
    color: var(--win-dark);
    border-color: #ffffff;
}

.btn-white:hover {
    background-color: var(--win-gray);
    border-color: var(--win-gray);
}

/* 下载页专用 */
.download-section {
    padding: 60px 0 80px;
    background-color: var(--win-light);
}

.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: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.dl-card:hover {
    box-shadow: var(--shadow-window);
}

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

.dl-card.highlight::before {
    content: '推荐安装';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--win-blue);
    color: #fff;
    font-size: 12px;
    padding: 2px 12px;
    border-radius: 12px;
}

.d-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

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

.dl-card p {
    color: var(--text-sub);
    font-size: 13px;
    margin-bottom: 24px;
    min-height: 40px;
}

/* 帮助中心专用 */
.faq-section {
    padding: 60px 0 80px;
    background-color: var(--bg-white);
}

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

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

.faq-item h3 {
    font-size: 15px;
    margin-bottom: 12px;
    color: var(--text-main);
    font-weight: 600;
}

.faq-item p {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.6;
}

/* 页脚 */
.pc-footer {
    background-color: var(--win-light);
    border-top: 1px solid var(--border-color);
    color: var(--text-sub);
    padding: 48px 0 24px;
}

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

.footer-brand .logo-text {
    color: var(--text-main);
}

.footer-brand p {
    margin-top: 12px;
    font-size: 13px;
    line-height: 1.6;
}

.footer-links h4 {
    font-size: 14px;
    margin-bottom: 16px;
    font-weight: 600;
    color: var(--text-main);
}

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

.footer-links a:hover {
    color: var(--win-blue);
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    text-align: center;
    font-size: 12px;
    color: var(--text-light);
}

@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; }
}