```css
:root {
    --primary: #6C5CE7;
    --primary-light: #A29BFE;
    --secondary: #FD79A8;
    --accent: #FFEAA7;
    --bg: #0F0E17;
    --bg-card: rgba(255, 255, 255, 0.06);
    --bg-card-hover: rgba(255, 255, 255, 0.12);
    --text: #E0E0E0;
    --text-heading: #FFFFFF;
    --text-muted: #A0A0A0;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --nav-height: 72px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-display: "PingFang SC", "Microsoft YaHei", sans-serif;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #F8F9FC;
        --bg-card: rgba(0, 0, 0, 0.04);
        --bg-card-hover: rgba(0, 0, 0, 0.08);
        --text: #2D3436;
        --text-heading: #111111;
        --text-muted: #636E72;
        --border: rgba(0, 0, 0, 0.08);
        --shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    }
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    transition: var(--transition);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 20%, rgba(108, 92, 231, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(253, 121, 168, 0.12) 0%, transparent 40%);
    pointer-events: none;
    z-index: -1;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 14, 23, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

@media (prefers-color-scheme: light) {
    header {
        background: rgba(255, 255, 255, 0.85);
    }
}

header nav {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo-area h1 {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}

.nav-menu a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 10px 16px;
    border-radius: 50px;
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
    transform: translateY(-2px);
}

/* Main container */
main {
    max-width: 1440px;
    margin: 0 auto;
    padding: calc(var(--nav-height) + 40px) 24px 60px;
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
}

.section {
    scroll-margin-top: calc(var(--nav-height) + 20px);
    margin-bottom: 60px;
}

.section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 32px;
    position: relative;
    padding-bottom: 16px;
    color: var(--text-heading);
    letter-spacing: -0.5px;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    background: var(--bg-card-hover);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    border-color: var(--primary-light);
}

.card img {
    width: 100%;
    height: auto;
    aspect-ratio: 5/7;
    object-fit: cover;
    display: block;
    transition: var(--transition);
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(253, 121, 168, 0.1));
}

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

.card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 16px 16px 8px;
    color: var(--text-heading);
    line-height: 1.4;
}

.card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0 16px 6px;
    line-height: 1.5;
}

.card p:last-child {
    margin-bottom: 16px;
}

/* Intro & Platform Sections */
#intro article,
#platform article {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

#intro h3,
#platform h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 24px 0 12px;
    color: var(--text-heading);
}

#intro p,
#platform p {
    margin-bottom: 16px;
    line-height: 1.8;
}

/* Download Buttons */
.download-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.download-buttons a {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}

.download-buttons a:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 25px rgba(108, 92, 231, 0.5);
}

.download-buttons a:nth-child(2) {
    background: transparent;
    border-color: var(--primary);
    color: var(--primary);
}

.download-buttons a:nth-child(3) {
    background: transparent;
    border-color: var(--secondary);
    color: var(--secondary);
}

/* Comments */
.comment-list {
    display: grid;
    gap: 16px;
}

.comment-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 20px 24px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.comment-item:hover {
    background: var(--bg-card-hover);
    transform: translateX(8px);
    border-left: 4px solid var(--primary);
}

.comment-item p:first-child {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.comment-item strong {
    color: var(--text-heading);
    font-size: 1rem;
}

.comment-item time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.comment-item p:last-child {
    color: var(--text);
    line-height: 1.7;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.widget {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.widget:hover {
    border-color: var(--primary-light);
    transform: translateY(-4px);
}

.widget h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-heading);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
    position: relative;
}

.widget h3::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.widget ol,
.widget ul {
    list-style-position: inside;
    padding-left: 0;
}

.widget ol li,
.widget ul li {
    padding: 8px 0;
    border-bottom: 1px dashed var(--border);
    font-size: 0.9rem;
    transition: var(--transition);
}

.widget ol li:last-child,
.widget ul li:last-child {
    border-bottom: none;
}

.widget ol li:hover,
.widget ul li:hover {
    color: var(--primary);
    padding-left: 8px;
}

.widget ol {
    counter-reset: rank;
    list-style: none;
}

.widget ol li {
    counter-increment: rank;
    display: flex;
    align-items: center;
    gap: 12px;
}

.widget ol li::before {
    content: counter(rank);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.widget ul {
    list-style: none;
}

.widget ul li::before {
    content: '•';
    color: var(--primary);
    font-size: 1.2rem;
    margin-right: 8px;
}

/* Footer */
footer {
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    padding: 48px 24px 24px;
    margin-top: 60px;
}

@media (prefers-color-scheme: light) {
    footer {
        background: rgba(0, 0, 0, 0.05);
    }
}

.footer-links {
    max-width: 1440px;
    margin: 0 auto 32px;
    text-align: center;
}

.footer-links h3 {
    font-size: 1.1rem;
    color: var(--text-heading);
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 24px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.footer-info {
    max-width: 1440px;
    margin: 0 auto;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.footer-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

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

.section {
    animation: fadeInUp 0.6s ease-out both;
}

.section:nth-child(2) { animation-delay: 0.1s; }
.section:nth-child(3) { animation-delay: 0.2s; }
.section:nth-child(4) { animation-delay: 0.3s; }
.section:nth-child(5) { animation-delay: 0.4s; }
.section:nth-child(6) { animation-delay: 0.5s; }
.section:nth-child(7) { animation-delay: 0.6s; }
.section:nth-child(8) { animation-delay: 0.7s; }

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 10px;
    border: 2px solid var(--bg);
}

/* Responsive */
@media (max-width: 1200px) {
    main {
        grid-template-columns: 1fr 280px;
        gap: 30px;
    }
}

@media (max-width: 992px) {
    .card-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }

    .section h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
        padding: calc(var(--nav-height) + 20px) 16px 40px;
        gap: 20px;
    }

    .nav-menu {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 4px;
    }

    .nav-menu::-webkit-scrollbar {
        display: none;
    }

    .nav-menu a {
        font-size: 0.85rem;
        padding: 8px 14px;
        white-space: nowrap;
    }

    .logo-area h1 {
        font-size: 1.4rem;
    }

    header nav {
        padding: 0 16px;
        gap: 16px;
    }

    .card-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 12px;
    }

    .card h3 {
        font-size: 0.95rem;
        margin: 12px 12px 6px;
    }

    .card p {
        font-size: 0.8rem;
        margin: 0 12px 4px;
    }

    .card p:last-child {
        margin-bottom: 12px;
    }

    #intro article,
    #platform article {
        padding: 20px;
    }

    .comment-item {
        padding: 16px;
    }

    .comment-item p:first-child {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .download-buttons {
        flex-direction: column;
    }

    .download-buttons a {
        text-align: center;
    }

    .sidebar {
        order: -1;
    }

    .widget {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .section h2 {
        font-size: 1.3rem;
    }

    .card h3 {
        font-size: 0.85rem;
    }

    .card p {
        font-size: 0.75rem;
    }

    .nav-menu a {
        font-size: 0.75rem;
        padding: 6px 10px;
    }

    .logo-area h1 {
        font-size: 1.2rem;
    }

    .download-buttons a {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

    .footer-links ul {
        gap: 8px 16px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Utility */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
```