/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

body {
    background-color: #121212; /* 深色主题非常适合黑胶 */
    color: #e0e0e0;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background-color: #1a1a1a;
    border-bottom: 1px solid #333;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #d4af37; /* 金色点缀 */
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #a0a0a0;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #d4af37;
}

/* 按钮 */
.cta-btn {
    padding: 0.6rem 1.5rem;
    border: 1px solid #d4af37;
    background: transparent;
    color: #d4af37;
    border-radius: 25px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
}

.cta-btn:hover {
    background: #d4af37;
    color: #121212;
}

.primary-btn {
    background-color: #d4af37;
    color: #121212;
    font-size: 1.1rem;
    padding: 0.8rem 2.5rem;
    margin-top: 1.5rem;
}

.primary-btn:hover {
    background-color: #bfa030;
    border-color: #bfa030;
}

/* 英雄区 (Hero) */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6rem 10%;
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
    min-height: 70vh;
}

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

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #ffffff;
}

.hero p {
    font-size: 1.2rem;
    color: #a0a0a0;
    margin-bottom: 2rem;
}

/* 黑胶唱片动画 */
.vinyl-display {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.vinyl-record {
    width: 300px;
    height: 300px;
    background: #111;
    border-radius: 50%;
    position: relative;
    box-shadow: 0 0 20px rgba(0,0,0,0.8), inset 0 0 10px #333;
    display: flex;
    justify-content: center;
    align-items: center;
    /* 唱片纹理 */
    background-image: repeating-radial-gradient(
        #111,
        #111 4px,
        #1a1a1a 5px,
        #1a1a1a 6px
    );
    transition: transform 0.5s ease;
}

.vinyl-label {
    width: 100px;
    height: 100px;
    background: #d4af37;
    border-radius: 50%;
    position: relative;
}

.vinyl-label::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 15px;
    height: 15px;
    background: #121212;
    border-radius: 50%;
}

/* 旋转动画类 */
.spinning {
    animation: spin 3s linear infinite;
}

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

/* 特点区 */
.features {
    padding: 5rem 10%;
    text-align: center;
    background-color: #161616;
}

.features h2 {
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: #fff;
}

.feature-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.feature-card {
    background: #1e1e1e;
    padding: 2.5rem;
    border-radius: 10px;
    width: 320px;
    border-top: 3px solid #d4af37;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

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

.feature-card p {
    color: #a0a0a0;
}

/* 页脚 */
footer {
    text-align: center;
    padding: 3rem;
    background-color: #0a0a0a;
    color: #666;
    border-top: 1px solid #222;
}

footer a {
    color: #d4af37;
    text-decoration: none;
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 4rem 5%;
    }
    .vinyl-display {
        margin-top: 3rem;
    }
    .nav-links {
        display: none;
    }
}