/* 蓝色玻璃卡片风，官方质感 CSS */
:root {
    --primary-color: #1677FF;
    --primary-hover: #0958D9;
    --text-main: #1D2129;
    --text-sub: #4E5969;
    --bg-gradient: linear-gradient(135deg, #E8F0FE 0%, #F4F7FC 100%);
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px rgba(22, 119, 255, 0.08);
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    color: var(--text-main);
    line-height: 1.6;
    background: var(--bg-gradient);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* 动态背景点缀，增强玻璃质感 */
body::before {
    content: '';
    position: fixed;
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(22,119,255,0.1) 0%, rgba(255,255,255,0) 70%);
    z-index: -1;
}
body::after {
    content: '';
    position: fixed;
    bottom: -10%;
    right: -10%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(0,180,255,0.1) 0%, rgba(255,255,255,0) 70%);
    z-index: -1;
}

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

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

/* 玻璃拟态基础类 */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-align: center;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
    border-radius: 12px;
}

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

.btn-primary {
    background: linear-gradient(135deg, #1677FF 0%, #0958D9 100%);
    color: #ffffff;
    box-shadow: 0 6px 16px rgba(22, 119, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(22, 119, 255, 0.4);
}

.btn-outline {
    background-color: rgba(255, 255, 255, 0.5);
    border-color: var(--primary-color);
    color: var(--primary-color);
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background-color: #ffffff;
    transform: translateY(-2px);
}

/* 导航栏 */
.modern-nav {
    position: sticky;
    top: 16px;
    z-index: 1000;
    margin: 0 24px;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    padding: 0 32px;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
    border-radius: 24px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #1677FF 0%, #00B4FF 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(22,119,255,0.3);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    font-size: 15px;
    color: var(--text-sub);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 8px;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--primary-color);
    background: rgba(22, 119, 255, 0.05);
}

/* Hero Section */
.modern-hero {
    padding: 100px 0 60px;
}

.page-hero {
    padding: 80px 0 40px;
}

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

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(22, 119, 255, 0.1);
    border: 1px solid rgba(22, 119, 255, 0.2);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
}

.hero-content h1 {
    font-size: 48px;
    line-height: 1.2;
    font-weight: 800;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #1D2129 0%, #1677FF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-sub);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.hero-meta {
    font-size: 13px;
    color: var(--text-sub);
    display: flex;
    gap: 16px;
}

.hero-img-wrapper {
    padding: 12px;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(22, 119, 255, 0.1);
    transform: perspective(1000px) rotateY(-5deg);
    transition: transform 0.5s ease;
}

.hero-img-wrapper:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.hero-img {
    width: 100%;
    border-radius: 16px;
    display: block;
}

/* Data Section */
.modern-data {
    padding: 40px 0;
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
    padding: 32px;
}

.data-num {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.data-label {
    font-size: 15px;
    color: var(--text-sub);
    font-weight: 500;
}

/* Features */
.modern-features {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 56px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-main);
}

.section-title p {
    font-size: 18px;
    color: var(--text-sub);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 40px 32px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(22, 119, 255, 0.12);
    background: rgba(255, 255, 255, 0.85);
}

.f-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(22, 119, 255, 0.1) 0%, rgba(0, 180, 255, 0.1) 100%);
    color: var(--primary-color);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
    border: 1px solid rgba(255,255,255,0.5);
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.7;
}

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

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.solution-card {
    overflow: hidden;
    transition: var(--transition);
    padding: 12px;
}

.solution-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.85);
}

.card-img-wrap {
    height: 200px;
    overflow: hidden;
    border-radius: 12px;
}

.card-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.solution-card:hover .card-img-wrap img {
    transform: scale(1.05);
}

.s-content {
    padding: 24px 16px 12px;
}

.s-content h3 {
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 700;
}

.s-content p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.6;
}

/* CTA */
.modern-cta {
    padding: 80px 0;
}

.cta-box {
    background: linear-gradient(135deg, rgba(22, 119, 255, 0.9) 0%, rgba(9, 88, 217, 0.9) 100%);
    backdrop-filter: blur(20px);
    color: #ffffff;
    padding: 60px 40px;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(22, 119, 255, 0.2);
    border: 1px solid rgba(255,255,255,0.2);
}

.cta-box h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 20px;
}

.cta-box p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Download Page Specific */
.download-section {
    padding: 60px 0 100px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.dl-card {
    padding: 48px 32px;
    text-align: center;
    transition: var(--transition);
}

.dl-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 16px 40px rgba(22, 119, 255, 0.15);
}

.dl-card.highlight {
    background: rgba(255, 255, 255, 0.85);
    border: 2px solid var(--primary-color);
    position: relative;
}

.dl-card.highlight::before {
    content: '官方推荐';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--primary-color);
    color: #fff;
    font-size: 13px;
    padding: 6px 16px;
    border-radius: 0 18px 0 16px;
    font-weight: 600;
}

.d-icon {
    font-size: 64px;
    margin-bottom: 24px;
    filter: drop-shadow(0 4px 8px rgba(22,119,255,0.2));
}

.dl-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
    font-weight: 700;
}

.dl-card p {
    color: var(--text-sub);
    font-size: 15px;
    margin-bottom: 32px;
    min-height: 48px;
}

/* FAQ Section */
.faq-section {
    padding: 60px 0 100px;
}

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

.faq-item {
    padding: 32px;
    margin-bottom: 24px;
    transition: var(--transition);
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.85);
    transform: translateX(4px);
}

.faq-item h3 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-main);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.faq-item h3::before {
    content: '';
    width: 6px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 4px;
}

.faq-item p {
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.7;
    padding-left: 14px;
}

/* Footer */
.modern-footer {
    padding: 60px 0 24px;
    margin-top: 40px;
}

.footer-inner {
    padding: 60px 40px 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 16px;
    margin-bottom: 24px;
    font-weight: 600;
    color: var(--text-main);
}

.footer-links a {
    display: block;
    color: var(--text-sub);
    font-size: 14px;
    margin-bottom: 16px;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(0,0,0,0.05);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: var(--text-sub);
}

@media (max-width: 900px) {
    .hero-grid, .data-grid, .features-grid, .solutions-grid, .download-grid, .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .nav-menu { display: none; }
    .hero-actions, .cta-actions { flex-direction: column; }
    .nav-wrapper { padding: 0 20px; border-radius: 16px; }
}