/* CPU-Z 官网样式 - SEO友好HTML5标准 */
:root {
    --primary-color: #4a2693;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --dark-bg: #1a1a2e;
    --light-bg: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
header {
    background: #fff;
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo svg {
    width: 40px;
    height: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 0;
    border-bottom: 2px solid transparent;
}

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

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition);
}

/* 主内容区 */
main {
    margin-top: 70px;
}

/* Hero 区域 */
.hero {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #16213e 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto 30px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: #1557b0;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(26, 115, 232, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: var(--dark-bg);
}

/* 功能区 */
.features {
    padding: 80px 0;
    background: var(--light-bg);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    fill: #fff;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 软件介绍 */
.about-software {
    padding: 80px 0;
}

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

.about-content h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--light-bg);
    border-radius: 10px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.about-image {
    background: linear-gradient(135deg, #f0f4ff 0%, #e8f4f0 100%);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
}

.software-preview {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* 下载区域 */
.download-section {
    padding: 80px 0;
    background: var(--dark-bg);
    color: #fff;
}

.download-section .section-title {
    color: #fff;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.download-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.download-card:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-5px);
}

.download-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.download-card p {
    opacity: 0.8;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* 页脚 */
footer {
    background: #0f0f1a;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #888;
    font-size: 0.9rem;
}

/* 弹窗样式 */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.modal-overlay.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal {
    background: #fff;
    border-radius: 16px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.3rem;
    color: var(--text-color);
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--light-bg);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--accent-color);
    color: #fff;
}

.modal-body {
    padding: 30px;
}

.qr-section {
    text-align: center;
    margin-bottom: 30px;
}

.qr-section:last-child {
    margin-bottom: 0;
}

.qr-section h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.qr-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.qr-item {
    text-align: center;
}

.qr-item img {
    width: 150px;
    height: 150px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.qr-item p {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 页面特定样式 */
.page-header {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #16213e 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.page-header p {
    opacity: 0.8;
    font-size: 1.1rem;
}

.content-section {
    padding: 60px 0;
}

.content-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.content-card h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.content-card p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.content-card ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.content-card li {
    margin-bottom: 8px;
    color: var(--text-light);
}

/* 下载页面 */
.download-platform {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.platform-card {
    background: var(--light-bg);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.platform-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.platform-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.platform-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.platform-card p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 技术支持 */
.support-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.support-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    text-align: center;
}

.support-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.support-icon svg {
    width: 35px;
    height: 35px;
    fill: #fff;
}

.support-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.support-card p {
    color: var(--text-light);
    margin-bottom: 20px;
}

/* 更新日志 */
.changelog-list {
    position: relative;
}

.changelog-item {
    position: relative;
    padding-left: 30px;
    padding-bottom: 30px;
    border-left: 2px solid var(--border-color);
    margin-left: 10px;
}

.changelog-item:last-child {
    border-left-color: transparent;
}

.changelog-item::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 0;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.changelog-version {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.changelog-date {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.changelog-content {
    background: var(--light-bg);
    border-radius: 8px;
    padding: 20px;
}

.changelog-content h4 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.changelog-content ul {
    list-style: none;
}

.changelog-content li {
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-light);
}

.changelog-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 10px;
}

.faq-answer {
    color: var(--text-light);
    line-height: 1.7;
}

/* 面包屑 */
.breadcrumb {
    padding: 15px 0;
    background: var(--light-bg);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    list-style: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 10px;
}

.breadcrumb-list a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-list a:hover {
    text-decoration: underline;
}

.breadcrumb-list span {
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        gap: 15px;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .qr-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* 打印样式 */
@media print {
    header, footer, .btn, .modal-overlay {
        display: none;
    }

    main {
        margin-top: 0;
    }
}

/* 辅助类 */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }