/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    --accent-blue: #0a84ff;
    --accent-purple: #bf5af2;
    --accent-green: #30d158;
    --accent-pink: #ff375f;
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== 极光背景 ===== */
.aurora-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(180deg, #0a0a0f 0%, #0f0f1a 50%, #0a0a0f 100%);
}

.aurora-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #0a84ff, #5e5ce6);
    top: -200px;
    left: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #bf5af2, #ff375f);
    top: 30%;
    right: -150px;
    animation-delay: -7s;
}

.blob-3 {
    width: 550px;
    height: 550px;
    background: linear-gradient(135deg, #30d158, #0a84ff);
    bottom: -200px;
    left: 20%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(50px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-30px, 30px) scale(0.95);
    }
}

/* ===== 毛玻璃效果 ===== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--glass-shadow);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-icon svg {
    width: 18px;
    height: 18px;
}

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

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent-blue);
    border-radius: 1px;
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
}

.hero-card {
    max-width: 800px;
    width: 100%;
    padding: 60px;
    text-align: center;
    animation: fadeInUp 0.8s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(10, 132, 255, 0.1);
    border: 1px solid rgba(10, 132, 255, 0.3);
    border-radius: 20px;
    font-size: 13px;
    color: var(--accent-blue);
    margin-bottom: 24px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #a0a0a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

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

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #5e5ce6);
    color: white;
    box-shadow: 0 4px 20px rgba(10, 132, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(10, 132, 255, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 36px;
    font-size: 16px;
}

/* ===== 通用区块样式 ===== */
section {
    padding: 100px 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ===== 功能特性 ===== */
.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
}

.feature-card.featured {
    border-color: rgba(10, 132, 255, 0.3);
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.1), rgba(191, 90, 242, 0.05));
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.icon-1 {
    background: linear-gradient(135deg, #0a84ff, #5e5ce6);
}

.icon-2 {
    background: linear-gradient(135deg, #bf5af2, #ff375f);
}

.icon-3 {
    background: linear-gradient(135deg, #30d158, #0a84ff);
}

.icon-4 {
    background: linear-gradient(135deg, #ff9f0a, #ff375f);
}

.icon-5 {
    background: linear-gradient(135deg, #64d2ff, #0a84ff);
}

.icon-6 {
    background: linear-gradient(135deg, #bf5af2, #64d2ff);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.tag {
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* ===== 技术规格 ===== */
.tech {
    padding: 100px 24px;
}

.tech-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.tech-list {
    margin-top: 32px;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary);
    font-size: 15px;
}

.tech-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-blue);
    border-radius: 50%;
    flex-shrink: 0;
}

/* 技术可视化卡片 */
.tech-visual {
    padding: 24px;
}

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

.visual-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.visual-title {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-left: 8px;
}

.visual-body {
    padding: 8px 0;
}

.flow-step {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
}

.step-number {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.step-name {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 2px;
}

.step-desc {
    font-size: 13px;
    color: var(--text-tertiary);
}

.flow-line {
    width: 2px;
    height: 20px;
    background: var(--glass-border);
    margin-left: 15px;
}

/* ===== 下载区域 ===== */
.download {
    padding: 100px 24px;
}

.download-card {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 60px;
    align-items: center;
}

.download-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.download-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.download-meta {
    display: flex;
    gap: 32px;
    margin-bottom: 32px;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-value {
    font-size: 18px;
    font-weight: 600;
}

.download-note {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 16px;
}

.download-platform {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.platform-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.2), rgba(94, 92, 230, 0.2));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-blue);
}

.platform-icon svg {
    width: 40px;
    height: 40px;
}

.platform-name {
    font-size: 16px;
    font-weight: 600;
}

/* ===== 页脚 ===== */
.footer {
    padding: 40px 24px;
    border-top: 1px solid var(--glass-border);
    background: rgba(10, 10, 15, 0.5);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-logo {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.footer-logo svg {
    width: 14px;
    height: 14px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

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

.footer-copy {
    font-size: 13px;
    color: var(--text-tertiary);
}

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .download-card {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .download-meta {
        justify-content: center;
    }
    
    .download-platform {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-card {
        padding: 40px 24px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-card {
        padding: 40px 24px;
    }
    
    .download-title {
        font-size: 28px;
    }
    
    .download-meta {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}