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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-tertiary: #666666;
    --accent: #7c3aed;
    --accent-hover: #8b5cf6;
    --border: #2a2a2a;
    --card-bg: #1a1a1a;
    --tag-bg: #1a1a1a;
    --tag-border: #2a2a2a;
}

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

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

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

.main {
    flex: 1;
    padding-top: 60px;
}

.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: 4rem 2rem;
    background: var(--bg-primary);
}

.hero-layout {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hero-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.hero-brand-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.hero-tags {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--tag-bg);
    border: 1px solid var(--tag-border);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: all 0.2s;
}

.tag:hover {
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

.tag-icon {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.hero-screenshot {
    position: relative;
}

.screenshot-img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.screenshot-img:hover {
    transform: translateY(-4px);
}

.screenshot-section {
    padding: 6rem 2rem;
    background: var(--bg-primary);
}

.screenshot-content {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.screenshot-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.screenshot-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
}

.screenshot-card:hover {
    border-color: var(--accent);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.screenshot-card .screenshot-img {
    border-radius: 0;
    box-shadow: none;
}

.screenshot-label {
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.label-badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
}

.label-badge.free {
    background: #1b3a1c;
    color: #4ade80;
}

.label-badge.pro {
    background: #3a2a1c;
    color: #fbbf24;
}

.label-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.features-section {
    padding: 6rem 2rem;
    background: var(--bg-secondary);
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.download-section {
    padding: 6rem 2rem;
    background: var(--bg-primary);
    text-align: center;
}

.download-content {
    max-width: 600px;
    margin: 0 auto;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.download-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-tertiary);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-version {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-left: 0.25rem;
}

.download-note {
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-tertiary);
    font-size: 0.875rem;
    background: var(--bg-secondary);
}

@media (max-width: 968px) {
    .hero-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-screenshot {
        order: -1;
    }

    .hero-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero {
        padding: 3rem 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-tags {
        gap: 0.75rem;
    }

    .tag {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .screenshot-section {
        padding: 4rem 1rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .screenshot-label {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .features-section {
        padding: 4rem 1rem;
    }

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

    .download-section {
        padding: 4rem 1rem;
    }

    .download-title {
        font-size: 2rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .nav-links a {
        font-size: 0.75rem;
    }

    .hero-brand-text {
        font-size: 1.25rem;
    }
}