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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: #ffffff;
    color: #1e3a5f;
    line-height: 1.6;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(30, 58, 95, 0.08);
    box-shadow: 0 2px 10px rgba(30, 58, 95, 0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.logo {
    font-size: 32px;
    font-weight: 900;
    letter-spacing: -1px;
    color: #0ea5e9;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: #475569;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s;
    position: relative;
}

.nav-links a:hover {
    color: #0ea5e9;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #0ea5e9;
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.btn-download-nav {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    color: white !important;
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s;
    border: 1px solid rgba(14, 165, 233, 0.3);
}

.btn-download-nav:hover {
    background: linear-gradient(135deg, #0284c7, #0369a1);
    border-color: #0ea5e9;
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
}

/* 按钮通用 */
.btn-download {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    color: white;
    padding: 16px 40px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    display: inline-block;
    transition: all 0.3s;
    border: 1px solid rgba(14, 165, 233, 0.3);
    cursor: pointer;
    letter-spacing: 0.5px;
}

.btn-download:hover {
    background: linear-gradient(135deg, #0284c7, #0369a1);
    box-shadow: 0 0 30px rgba(14, 165, 233, 0.5);
    transform: translateY(-2px);
}

/* Hero区域 */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding: 140px 0 80px;
    gap: 60px;
}

.hero-content {
    flex: 1;
    min-width: 320px;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.1;
    color: #0f172a;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-content p {
    font-size: 18px;
    color: #64748b;
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 20px 40px -10px rgba(14, 165, 233, 0.15);
    transition: all 0.4s ease;
}

.hero-image img:hover {
    transform: scale(1.03) translateY(-8px);
    box-shadow: 0 30px 60px -15px rgba(14, 165, 233, 0.25);
}

/* 特性卡片 */
.section-title {
    text-align: center;
    font-size: 42px;
    font-weight: 800;
    margin: 100px 0 60px;
    color: #0f172a;
    letter-spacing: -1px;
}

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

.section-subtitle {
    font-size: 14px;
    font-weight: 600;
    color: #0ea5e9;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 100px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.feature-card {
    background: #ffffff;
    padding: 48px;
    border-radius: 20px;
    transition: all 0.3s;
    text-align: center;
    border: 1px solid rgba(30, 58, 95, 0.08);
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.04);
}

.feature-card:hover {
    border-color: rgba(14, 165, 233, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(14, 165, 233, 0.12);
}

.feature-icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    color: white;
    flex-shrink: 0;
}

.feature-icon-wrap svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: #0f172a;
    font-weight: 700;
}

.feature-card p {
    color: #64748b;
    font-size: 15px;
    line-height: 1.7;
}

/* 适用场景 */
.scenes-section {
    margin: 100px 0;
}

.scene-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.scene-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    min-height: 200px;
    transition: transform 0.3s;
}

.scene-item:hover {
    transform: translateY(-4px);
}

.scene-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0ea5e9, #06b6d4);
}

.scene-bg-alt {
    background: linear-gradient(135deg, #8b5cf6, #a855f7);
}

.scene-bg-alt2 {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.scene-bg-alt3 {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.scene-content {
    position: relative;
    z-index: 1;
    padding: 28px;
    color: white;
}

.scene-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.scene-icon svg {
    width: 22px;
    height: 22px;
}

.scene-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.scene-content p {
    font-size: 14px;
    opacity: 0.9;
    line-height: 1.6;
}

/* 下载区域 */
.download-section {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    border-radius: 16px;
    padding: 80px 60px;
    text-align: center;
    margin: 100px 0;
    color: white;
}

.download-section h2 {
    font-size: 40px;
    margin-bottom: 20px;
    font-weight: 800;
    color: #ffffff;
}

.download-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.platform-btn {
    background: rgba(255, 255, 255, 0.15);
    padding: 14px 32px;
    border-radius: 8px;
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.platform-btn:hover {
    background: white;
    border-color: white;
    color: #0ea5e9;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto 100px;
}

.accordion-item {
    background: #ffffff;
    margin-bottom: 12px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(30, 58, 95, 0.08);
    box-shadow: 0 2px 8px rgba(30, 58, 95, 0.04);
}

.accordion-question {
    padding: 24px 28px;
    font-weight: 600;
    font-size: 17px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    color: #0f172a;
    transition: all 0.3s;
}

.accordion-question:hover {
    background: #f8fafc;
}

.accordion-answer {
    padding: 0 28px 24px;
    color: #64748b;
    display: none;
    border-top: 1px solid rgba(30, 58, 95, 0.06);
    font-size: 15px;
    line-height: 1.7;
}

.accordion-item.active .accordion-answer {
    display: block;
}

/* 页脚 */
.footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 60px 0 30px;
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-content h3 {
    color: #0ea5e9;
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 16px;
}

.footer-content h4 {
    color: #e2e8f0;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-content p {
    margin-bottom: 8px;
    font-size: 14px;
}

.footer-copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 13px;
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 40px;
    }
    .navbar .container {
        flex-direction: column;
        padding: 12px 24px;
    }
    .nav-links {
        gap: 20px;
    }
    .section-title {
        font-size: 32px;
    }
    .container {
        padding: 0 20px;
    }
    .hero {
        padding: 100px 0 60px;
    }
    .download-section {
        padding: 50px 30px;
    }
    .download-section h2 {
        font-size: 32px;
    }
}

/* Hero产品页区域 */
.hero-product {
    background: linear-gradient(135deg, #e0f2fe, #ffffff);
    padding: 120px 40px 60px;
    text-align: center;
    border-radius: 16px;
    margin: 32px 0;
    border: 1px solid rgba(14, 165, 233, 0.1);
}

.hero-product h1 {
    font-size: 44px;
    font-weight: 800;
    margin-bottom: 16px;
    color: #0f172a;
}

.hero-product p {
    font-size: 18px;
    color: #64748b;
}

/* 产品页功能卡片 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.feature-card-detailed {
    background: #ffffff;
    border-radius: 16px;
    padding: 36px;
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.06);
    transition: all 0.3s;
    border: 1px solid rgba(30, 58, 95, 0.08);
    text-align: center;
}

.feature-card-detailed:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(14, 165, 233, 0.12);
    border-color: rgba(14, 165, 233, 0.2);
}

.feature-card-detailed h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: #0f172a;
    font-weight: 700;
}

.feature-card-detailed p {
    color: #64748b;
    line-height: 1.7;
}

/* 节点网格 */
.node-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 20px 0 40px;
}

.node-tag {
    background: #e0f2fe;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    color: #0369a1;
    font-size: 14px;
    transition: all 0.2s;
}

.node-tag:hover {
    background: #0ea5e9;
    color: white;
}

/* 协议区域 */
.protocol-section {
    background: #f8fafc;
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 48px;
    border: 1px solid rgba(30, 58, 95, 0.06);
}

.protocol-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.protocol-badge {
    background: #ffffff;
    padding: 10px 20px;
    border-radius: 8px;
    font-family: monospace;
    font-size: 14px;
    font-weight: 600;
    color: #0ea5e9;
    border: 1px solid rgba(14, 165, 233, 0.2);
}

.protocol-section p {
    color: #475569;
    line-height: 1.8;
}

/* 用户评价 */
.testimonials {
    margin-bottom: 48px;
}

.testimonial {
    background: #ffffff;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
    border-left: 4px solid #0ea5e9;
    box-shadow: 0 2px 8px rgba(30, 58, 95, 0.04);
}

.testimonial p:first-child {
    color: #0f172a;
    font-style: italic;
    line-height: 1.6;
}

.testimonial p:last-child {
    margin-top: 12px;
    color: #0ea5e9;
    font-weight: 500;
    font-size: 14px;
}

/* 产品页下载区域 */
.download-full {
    background: #0f172a;
    border-radius: 16px;
    padding: 50px 32px;
    text-align: center;
    margin: 48px 0;
    color: white;
}

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

.download-full p {
    color: #94a3b8;
    font-size: 16px;
    line-height: 1.6;
}

.btn-white {
    background: white;
    color: #0f172a;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    margin: 16px 8px;
    transition: all 0.3s;
    font-size: 15px;
}

.btn-white:hover {
    background: #e0f2fe;
    transform: translateY(-2px);
}

/* 动画效果 */
.feature-card, .scene-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.feature-card.animate-in, .scene-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* 涟漪效果 */
.btn-download, .btn-download-nav, .platform-btn {
    position: relative;
    overflow: hidden;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: scale(0);
    animation: ripple-animation 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}