:root {
    --bg-color: #050505;
    --card-bg: rgba(255, 255, 255, 0.03);
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent-color: #00ffaa;
    --accent-glow: rgba(0, 255, 170, 0.4);
    --accent-hover: #00cc88;
    --border-color: rgba(255, 255, 255, 0.1);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 255, 170, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 150, 255, 0.03) 0%, transparent 40%);
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background-color: rgba(5, 5, 5, 0.8);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.navbar .logo {
    font-size: 1.25rem;
    font-weight: 800;
    background: linear-gradient(90deg, #fff, var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.03em;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.nav-links .btn-primary {
    color: #000;
    margin-left: 2rem;
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
}

/* 头部区域 (Hero) */
.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8rem 5% 5rem;
    min-height: 90vh;
    position: relative;
}

/* 装饰性光晕 */
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.2;
    z-index: -1;
    filter: blur(80px);
}

.hero-content {
    flex: 0.8;
    max-width: 500px;
    z-index: 1;
}

.hero-image {
    flex: 1.5;
    display: flex;
    justify-content: flex-end;
    position: relative;
    perspective: 1000px;
}

.hero-image img {
    max-width: 100%;
    border-radius: 20px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.6);
    border: 1px solid rgba(255,255,255,0.1);
    max-height: 550px;
    width: auto;
    object-fit: cover;
    transform: rotateY(-5deg) rotateX(2deg);
    transition: transform 0.5s ease;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.04em;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #b0b0b0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 90%;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn-primary {
    background: var(--accent-color);
    color: #000;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    border: none;
    cursor: pointer;
    box-shadow: 0 0 20px var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 0 30px var(--accent-glow);
    background: #fff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-primary);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    position: relative;
    perspective: 1000px;
}

.hero-image img {
    max-width: 100%;
    border-radius: 20px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.6);
    border: 1px solid rgba(255,255,255,0.1);
    max-height: 450px;
    object-fit: cover;
    transform: rotateY(-5deg) rotateX(2deg);
    transition: transform 0.5s ease;
}

.hero-image:hover img {
    transform: rotateY(0deg) rotateX(0deg) scale(1.02);
}

/* 特性区域 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 8rem 5%;
    position: relative;
}

.feature-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(255,255,255,0.05), transparent 40%);
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    filter: drop-shadow(0 0 10px rgba(0,255,170,0.3));
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: #fff;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* 对比区域 */
.comparison {
    padding: 8rem 5%;
    text-align: center;
    background: linear-gradient(180deg, transparent 0%, rgba(255,255,255,0.02) 50%, transparent 100%);
}

.comparison h2 {
    font-size: 2.5rem;
    margin-bottom: 4rem;
    letter-spacing: -0.02em;
}

.comparison-container {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.comparison-item {
    position: relative;
    max-width: 600px;
    flex: 1;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    border: 1px solid var(--border-color);
}

.comparison-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.comparison-item:hover img {
    transform: scale(1.05);
}

.comparison-item .label {
    position: absolute;
    bottom: 20px;
    left: 20px;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.comparison-item .label.bad {
    background-color: rgba(20, 20, 20, 0.8);
    color: #ff6b6b;
    border-color: rgba(255, 107, 107, 0.2);
}

.comparison-item .label.good {
    background-color: rgba(20, 20, 20, 0.8);
    color: var(--accent-color);
    border-color: rgba(0, 255, 170, 0.2);
}

/* 下载区域 */
.download-section {
    padding: 8rem 5%;
    display: flex;
    justify-content: center;
}

.download-card {
    background: linear-gradient(145deg, #111, #0a0a0a);
    padding: 4rem;
    border-radius: 30px;
    text-align: center;
    border: 1px solid var(--border-color);
    max-width: 800px;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.download-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    opacity: 0.5;
}

.download-card h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #fff, #bbb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.download-options {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background-color: var(--accent-color);
    color: #000;
    padding: 1.2rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.1rem;
    transition: all 0.3s;
    box-shadow: 0 0 30px rgba(0, 255, 170, 0.3);
}

.btn-download:hover {
    background-color: #fff;
    transform: scale(1.03) translateY(-2px);
    box-shadow: 0 0 50px rgba(0, 255, 170, 0.5);
}

.btn-download .version {
    background-color: rgba(0,0,0,0.08);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
}

.btn-download .size {
    font-size: 0.95rem;
    opacity: 0.7;
    font-weight: 500;
}

.note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    opacity: 0.6;
}

.download-card .note {
    margin-bottom: 0;
}

.reward-panel {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transform: translateY(12px);
    transition: max-height 0.4s ease, opacity 0.35s ease, transform 0.35s ease, margin-top 0.35s ease, padding 0.35s ease, border-color 0.35s ease;
    margin: 0 auto;
    max-width: 430px;
    padding: 0 1.2rem;
    border: 1px solid transparent;
    border-radius: 20px;
    pointer-events: none;
}

.reward-panel.is-visible {
    max-height: 760px;
    opacity: 1;
    margin-top: 1.5rem;
    padding: 1.3rem 1.2rem 1.2rem;
    transform: translateY(0);
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--border-color);
    pointer-events: auto;
}

.reward-panel h3 {
    margin-bottom: 1rem;
    font-size: 1.05rem;
    color: #fff;
}

.reward-panel img {
    display: block;
    width: 100%;
    max-width: 320px;
    margin: 0 auto 0.8rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.4);
    background: #fff;
}

.download-card .reward-fallback {
    font-size: 0.88rem;
    margin: 0;
    line-height: 1.5;
    color: #d0d0d0;
}

.reward-fallback code {
    color: var(--accent-color);
}

/* 页脚 */
footer {
    padding: 3rem 5%;
    background-color: #050505;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    color: #666;
    font-size: 0.9rem;
}

.social-links a {
    color: #888;
    margin-left: 2rem;
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

.social-links a:hover {
    color: var(--accent-color);
}

.social-links a svg {
    vertical-align: middle;
    margin-right: 0.5rem;
    display: inline-block;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .hero {
        flex-direction: column-reverse;
        padding-top: 4rem;
        text-align: center;
        min-height: auto;
    }

    .hero-content {
        margin-top: 3rem;
    }

    .hero h1 {
        font-size: 2.8rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary {
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    .comparison-container {
        flex-direction: column;
    }
    
    .navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
        width: 100%;
    }
    
    .nav-links a, .nav-links .btn-primary {
        margin-left: 0;
        font-size: 0.8rem;
    }
    
    .download-card {
        padding: 2rem;
    }
    
    .btn-download {
        flex-direction: column;
        gap: 0.5rem;
        padding: 1rem;
    }

    .reward-panel img {
        max-width: 280px;
    }
}