/* 首页专用样式 */

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--md-surface);
    box-shadow: var(--md-elevation-2);
    z-index: 1000;
    padding: 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 500;
    color: var(--md-primary);
    text-decoration: none;
}

.nav-logo .material-icons {
    font-size: 32px;
}

.logo-text {
    font-weight: 500;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-link {
    color: var(--md-on-surface);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
    padding: 8px 0;
}

.nav-link:hover {
    color: var(--md-primary);
}

.btn-nav {
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.2s;
}

.btn-primary-nav {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

.btn-primary-nav:hover {
    background: var(--md-primary-dark);
    color: var(--md-on-primary);
}

/* 英雄区域 */
.hero {
    margin-top: 80px;
    padding: 80px 24px;
    background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-dark) 100%);
    color: var(--md-on-primary);
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 48px;
    font-weight: 400;
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: 0.15px;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
    font-weight: 300;
}

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

.btn-hero {
    padding: 16px 32px;
    font-size: 16px;
    min-width: 160px;
}

.btn-hero.btn-primary {
    background: var(--md-surface);
    color: var(--md-primary);
}

.btn-hero.btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--md-elevation-4);
}

.btn-hero.btn-secondary {
    background: transparent;
    border: 2px solid var(--md-surface);
    color: var(--md-surface);
}

.btn-hero.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease-out;
}

.hero-icon {
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.hero-icon .material-icons {
    font-size: 150px;
    color: var(--md-on-primary);
    opacity: 0.9;
}

/* 英雄区域下载信息 */
.hero-download {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 32px;
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.download-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.download-info .material-icons {
    font-size: 32px;
    color: var(--md-on-primary);
    opacity: 0.9;
}

.download-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.download-label {
    font-size: 14px;
    opacity: 0.8;
    font-weight: 300;
}

.download-version {
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.btn-download {
    padding: 12px 24px;
    background: var(--md-surface);
    color: var(--md-primary);
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.75px;
    box-shadow: var(--md-elevation-2);
}

.btn-download:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--md-elevation-4);
    transform: translateY(-2px);
}

.btn-download .material-icons {
    font-size: 20px;
}

/* 功能特性 */
.features {
    padding: 80px 24px;
    background: var(--md-background);
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 400;
    margin-bottom: 16px;
    color: var(--md-on-surface);
    letter-spacing: 0.15px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--md-on-surface-secondary);
    margin-bottom: 48px;
    font-weight: 300;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.feature-card {
    background: var(--md-surface);
    padding: 32px;
    border-radius: 8px;
    box-shadow: var(--md-elevation-2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
}

.feature-card:hover {
    box-shadow: var(--md-elevation-8);
    transform: translateY(-8px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: rgba(25, 118, 210, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.feature-icon .material-icons {
    font-size: 40px;
    color: var(--md-primary);
}

.feature-title {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--md-on-surface);
    letter-spacing: 0.15px;
}

.feature-description {
    font-size: 14px;
    color: var(--md-on-surface-secondary);
    line-height: 1.6;
}

/* 产品优势 */
.advantages {
    padding: 80px 24px;
    background: var(--md-surface);
}

.advantages-content {
    max-width: 900px;
    margin: 0 auto;
    margin-top: 48px;
}

.advantage-item {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    margin-bottom: 48px;
    padding: 32px;
    background: var(--md-background);
    border-radius: 8px;
    transition: all 0.3s;
}

.advantage-item:hover {
    box-shadow: var(--md-elevation-4);
    transform: translateX(8px);
}

.advantage-number {
    font-size: 48px;
    font-weight: 300;
    color: var(--md-primary);
    line-height: 1;
    min-width: 80px;
    opacity: 0.5;
}

.advantage-text h3 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--md-on-surface);
    letter-spacing: 0.15px;
}

.advantage-text p {
    font-size: 16px;
    color: var(--md-on-surface-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 关于我们 */
.about {
    padding: 80px 24px;
    background: var(--md-background);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
    margin-top: 48px;
}

.about-text {
    margin-bottom: 48px;
}

.about-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--md-on-surface-secondary);
    margin-bottom: 24px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.stat-item {
    text-align: center;
    padding: 32px;
    background: var(--md-surface);
    border-radius: 8px;
    box-shadow: var(--md-elevation-2);
    transition: all 0.3s;
}

.stat-item:hover {
    box-shadow: var(--md-elevation-4);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 48px;
    font-weight: 300;
    color: var(--md-primary);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-label {
    font-size: 16px;
    color: var(--md-on-surface-secondary);
    font-weight: 500;
}

/* 下载区域 */
.download-section {
    padding: 80px 24px;
    background: var(--md-surface);
}

.download-card {
    max-width: 900px;
    margin: 0 auto;
    margin-top: 48px;
    background: var(--md-background);
    border-radius: 12px;
    box-shadow: var(--md-elevation-4);
    overflow: hidden;
    transition: all 0.3s;
}

.download-card:hover {
    box-shadow: var(--md-elevation-8);
    transform: translateY(-4px);
}

.download-content {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 32px;
    align-items: center;
    padding: 40px;
}

.download-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-dark) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.download-icon .material-icons {
    font-size: 40px;
    color: var(--md-on-primary);
}

.download-details {
    flex: 1;
}

.download-title {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--md-on-surface);
    letter-spacing: 0.15px;
}

.download-description {
    font-size: 14px;
    color: var(--md-on-surface-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.download-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.download-version-label {
    color: var(--md-on-surface-secondary);
}

.download-version-value {
    color: var(--md-primary);
    font-weight: 500;
    font-size: 16px;
}

.download-action {
    text-align: center;
    flex-shrink: 0;
}

.btn-download-large {
    padding: 16px 32px;
    background: var(--md-primary);
    color: var(--md-on-primary);
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.75px;
    box-shadow: var(--md-elevation-2);
    margin-bottom: 8px;
}

.btn-download-large:hover {
    background: var(--md-primary-dark);
    box-shadow: var(--md-elevation-4);
    transform: translateY(-2px);
}

.btn-download-large .material-icons {
    font-size: 24px;
}

.download-note {
    font-size: 12px;
    color: var(--md-on-surface-secondary);
    margin: 0;
}

/* 行动号召 */
.cta {
    padding: 80px 24px;
    background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-dark) 100%);
    color: var(--md-on-primary);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 36px;
    font-weight: 400;
    margin-bottom: 16px;
    letter-spacing: 0.15px;
}

.cta-subtitle {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
    font-weight: 300;
}

.btn-cta {
    padding: 16px 48px;
    font-size: 18px;
    background: var(--md-surface);
    color: var(--md-primary);
    min-width: 200px;
}

.btn-cta:hover {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--md-elevation-8);
}

/* 页脚 */
.footer {
    background: var(--md-on-surface);
    color: rgba(255, 255, 255, 0.87);
    padding: 48px 24px 24px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 32px;
}

.footer-title {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--md-on-primary);
}

.footer-text {
    font-size: 14px;
    opacity: 0.7;
    line-height: 1.6;
}

.footer-heading {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--md-on-primary);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--md-on-primary);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    opacity: 0.7;
    margin: 0;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 12px;
    }

    .nav-link {
        font-size: 12px;
    }

    .btn-nav {
        padding: 6px 12px;
        font-size: 12px;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-icon {
        width: 200px;
        height: 200px;
    }

    .hero-icon .material-icons {
        font-size: 100px;
    }

    .hero-download {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }

    .download-content {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 24px;
    }

    .download-action {
        text-align: center;
    }

    .section-title {
        font-size: 28px;
    }

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

    .advantage-item {
        flex-direction: column;
        text-align: center;
    }

    .advantage-number {
        margin: 0 auto;
    }

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

    .cta-title {
        font-size: 28px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}