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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    min-height: 100vh;
    color: #fff;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a0a0a 50%, #2d0a0a 100%);
    overflow-x: hidden;
    position: relative;
}

.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.music-notes {
    position: absolute;
    font-size: 24px;
    opacity: 0.15;
    animation: floatNote 15s linear infinite;
}

.music-notes:nth-child(1) { left: 5%; top: 20%; animation-delay: 0s; font-size: 20px; }
.music-notes:nth-child(2) { left: 15%; top: 60%; animation-delay: -3s; font-size: 28px; }
.music-notes:nth-child(3) { left: 25%; top: 30%; animation-delay: -6s; font-size: 22px; }
.music-notes:nth-child(4) { left: 40%; top: 70%; animation-delay: -9s; font-size: 30px; }
.music-notes:nth-child(5) { left: 55%; top: 25%; animation-delay: -12s; font-size: 18px; }
.music-notes:nth-child(6) { left: 70%; top: 55%; animation-delay: -2s; font-size: 26px; }
.music-notes:nth-child(7) { left: 85%; top: 35%; animation-delay: -7s; font-size: 24px; }
.music-notes:nth-child(8) { left: 95%; top: 80%; animation-delay: -11s; font-size: 20px; }

@keyframes floatNote {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.15; }
    90% { opacity: 0.15; }
    100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
}

.sound-waves {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 4px;
    padding-bottom: 20px;
}

.wave-bar {
    width: 4px;
    background: linear-gradient(to top, #c20c0c, #ff4444);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}

.wave-bar:nth-child(1) { height: 30px; animation-delay: 0s; }
.wave-bar:nth-child(2) { height: 50px; animation-delay: 0.1s; }
.wave-bar:nth-child(3) { height: 70px; animation-delay: 0.2s; }
.wave-bar:nth-child(4) { height: 90px; animation-delay: 0.3s; }
.wave-bar:nth-child(5) { height: 60px; animation-delay: 0.4s; }
.wave-bar:nth-child(6) { height: 80px; animation-delay: 0.5s; }
.wave-bar:nth-child(7) { height: 50px; animation-delay: 0.6s; }
.wave-bar:nth-child(8) { height: 40px; animation-delay: 0.7s; }
.wave-bar:nth-child(9) { height: 65px; animation-delay: 0.8s; }
.wave-bar:nth-child(10) { height: 45px; animation-delay: 0.9s; }

@keyframes wave {
    0%, 100% { transform: scaleY(0.5); }
    50% { transform: scaleY(1); }
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(194, 12, 12, 0.2);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
    font-size: 20px;
    font-weight: 600;
}

.logo-icon {
    font-size: 32px;
    filter: drop-shadow(0 0 10px rgba(194, 12, 12, 0.5));
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 15px;
    transition: all 0.3s;
    position: relative;
    padding: 8px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #c20c0c, #ff4444);
    transition: width 0.3s;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 10px 24px;
    background: linear-gradient(135deg, rgba(194, 12, 12, 0.3), rgba(255, 68, 68, 0.2));
    border-radius: 50px;
    font-size: 14px;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(194, 12, 12, 0.4);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 20px rgba(194, 12, 12, 0.3); }
    50% { box-shadow: 0 0 40px rgba(194, 12, 12, 0.5); }
}

.hero-section h1 {
    font-size: 72px;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, #ff6666 50%, #c20c0c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(194, 12, 12, 0.5);
}

.subtitle {
    font-size: 22px;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.6;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: linear-gradient(135deg, #c20c0c, #ff4444);
    color: #fff;
    box-shadow: 0 8px 30px rgba(194, 12, 12, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(194, 12, 12, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

/* Hero Visual */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
}

.vinyl-disc {
    position: relative;
    width: 320px;
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.disc-center {
    font-size: 80px;
    z-index: 2;
    filter: drop-shadow(0 0 20px rgba(194, 12, 12, 0.8));
}

.disc-grooves {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.1);
    animation: spin 8s linear infinite;
}

.disc-grooves:nth-child(2) { width: 90%; height: 90%; animation-duration: 10s; animation-direction: reverse; }
.disc-grooves:nth-child(3) { width: 80%; height: 80%; animation-duration: 12s; }
.disc-grooves:nth-child(4) { width: 70%; height: 70%; animation-duration: 14s; animation-direction: reverse; }

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.disc-glow {
    position: absolute;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(194, 12, 12, 0.4) 0%, transparent 70%);
    border-radius: 50%;
    animation: discPulse 2s ease-in-out infinite;
}

@keyframes discPulse {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 24px;
    position: relative;
    z-index: 1;
}

.stat-card {
    text-align: center;
    padding: 32px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(194, 12, 12, 0.2);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(194, 12, 12, 0.5);
    box-shadow: 0 20px 50px rgba(194, 12, 12, 0.2);
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff, #ff6666);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    opacity: 0.85;
}

/* Features Section */
.features-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 24px;
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    font-size: 40px;
    margin-bottom: 50px;
    background: linear-gradient(135deg, #fff, #ff6666);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 32px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(194, 12, 12, 0.15);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    background: rgba(194, 12, 12, 0.1);
    border-color: rgba(194, 12, 12, 0.3);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px rgba(194, 12, 12, 0.5));
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    opacity: 0.85;
    line-height: 1.7;
}

/* Playlist Section */
.playlist-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px;
    position: relative;
    z-index: 1;
}

.playlists-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.playlist-card {
    text-align: center;
    padding: 24px 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(194, 12, 12, 0.15);
    transition: all 0.3s;
    cursor: pointer;
}

.playlist-card:hover {
    transform: translateY(-5px);
    background: rgba(194, 12, 12, 0.1);
    border-color: rgba(194, 12, 12, 0.3);
}

.playlist-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.playlist-card h4 {
    font-size: 15px;
    margin-bottom: 6px;
}

.playlist-card p {
    font-size: 12px;
    opacity: 0.7;
}

/* Comments Section */
.comments-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
    position: relative;
    z-index: 1;
}

.comments-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.comment-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 24px;
    border-left: 3px solid rgba(194, 12, 12, 0.5);
    transition: all 0.3s;
}

.comment-card:hover {
    background: rgba(194, 12, 12, 0.05);
}

.comment-text {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 16px;
    font-style: italic;
}

.comment-author {
    font-size: 13px;
    opacity: 0.7;
}

/* Extra Features */
.extra-features {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 100px;
    position: relative;
    z-index: 1;
}

.feature-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Footer */
.footer {
    padding: 40px 24px;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

.footer-content p {
    margin-bottom: 8px;
    font-size: 14px;
    opacity: 0.85;
}

.footer a {
    color: #ff6666;
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer a:hover {
    opacity: 0.8;
}

/* Download Page */
.download-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 60px;
    position: relative;
    z-index: 1;
}

.download-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    border-radius: 32px;
    padding: 60px;
    text-align: center;
    border: 1px solid rgba(194, 12, 12, 0.2);
    max-width: 500px;
    width: 100%;
}

.app-icon-large {
    font-size: 100px;
    margin-bottom: 24px;
    animation: bounce 2s ease-in-out infinite;
    filter: drop-shadow(0 0 30px rgba(194, 12, 12, 0.5));
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.download-card h1 {
    font-size: 36px;
    margin-bottom: 12px;
}

.tagline {
    font-size: 16px;
    opacity: 0.85;
    margin-bottom: 32px;
}

.download-info {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 32px;
    text-align: left;
    border: 1px solid rgba(194, 12, 12, 0.15);
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    opacity: 0.7;
}

.info-value {
    font-weight: 600;
}

.btn-download {
    width: 100%;
    justify-content: center;
    font-size: 18px;
    padding: 18px 32px;
}

.platform-support {
    margin-top: 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.platform-badge {
    padding: 6px 16px;
    background: rgba(194, 12, 12, 0.2);
    border-radius: 20px;
    font-size: 13px;
    border: 1px solid rgba(194, 12, 12, 0.3);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}

.back-link svg {
    width: 18px;
    height: 18px;
}

.back-link:hover {
    color: #ff6666;
}

/* Error Page */
.error-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 60px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.error-visual {
    position: relative;
    margin-bottom: 30px;
}

.broken-disc {
    position: relative;
    font-size: 120px;
}

.disc-icon {
    position: relative;
    z-index: 2;
    animation: shake 0.5s ease-in-out;
    filter: drop-shadow(0 0 30px rgba(194, 12, 12, 0.5));
}

@keyframes shake {
    0%, 100% { transform: translateX(0) rotate(0deg); }
    25% { transform: translateX(-10px) rotate(-5deg); }
    75% { transform: translateX(10px) rotate(5deg); }
}

.broken-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 180px;
    height: 180px;
    border: 2px dashed rgba(194, 12, 12, 0.4);
    border-radius: 50%;
    animation: broken-spin 3s linear infinite;
}

.broken-ring:nth-child(2) {
    width: 240px;
    height: 240px;
    animation-direction: reverse;
}

@keyframes broken-spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.error-code {
    font-size: 100px;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #c20c0c, #ff4444);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.error-page h1 {
    font-size: 32px;
    margin-bottom: 16px;
}

.error-page p {
    font-size: 16px;
    opacity: 0.85;
    margin-bottom: 40px;
    line-height: 1.7;
}

.error-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .playlists-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .comments-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-row {
        grid-template-columns: 1fr;
    }
    
    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 48px;
    }
    
    .subtitle {
        font-size: 18px;
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .nav-links a {
        font-size: 14px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .playlists-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-card {
        padding: 40px 24px;
    }
    
    .error-code {
        font-size: 72px;
    }
}

@media (max-width: 480px) {
    .hero-section h1 {
        font-size: 36px;
    }
    
    .playlists-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-section {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
}