/* 产品英雄区 */
.product-hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000000;
    overflow: hidden;
}

.product-hero::before {
    content: 'OPEREASE';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 180px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.03);
    letter-spacing: 20px;
    white-space: nowrap;
    z-index: 1;
}

.product-hero-background {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    max-width: 900px;
    height: auto;
    z-index: 2;
    filter: drop-shadow(0 20px 60px rgba(0, 0, 0, 0.8));
}

.product-hero-glow {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(180deg, transparent 0%, rgba(244, 184, 68, 0.15) 50%, rgba(244, 184, 68, 0.3) 100%);
    z-index: 3;
}

.product-hero-content {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    z-index: 4;
    padding: 150px 80px 80px;
}

.hero-title {
    font-size: 48px;
    font-weight: 300;
    margin-bottom: 30px;
    line-height: 1.3;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #f4b844 0%, #ffcd6b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 500;
}

.hero-description {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
}

/* 核心功能 */
.features {
    padding: 120px 80px;
    background: #000000;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

.feature-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 40px;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(244, 184, 68, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(244, 184, 68, 0.3);
    transform: translateY(-5px);
}

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

.feature-card .feature-list {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.4s ease;
    list-style: none;
    color: rgba(255, 255, 255, 0.6);
    line-height: 2;
}

.feature-card:hover .feature-list {
    max-height: 200px;
    opacity: 1;
    margin-top: 20px;
}

.feature-number {
    font-size: 14px;
    color: rgba(244, 184, 68, 0.6);
    margin-bottom: 20px;
}

.feature-title {
    font-size: 22px;
    margin-bottom: 0;
    font-weight: 500;
    transition: margin-bottom 0.4s;
}

.feature-card:hover .feature-title {
    margin-bottom: 20px;
}

.feature-list li:before {
    content: "·";
    color: #f4b844;
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* AI体系 */
.ai-system {
    padding: 120px 80px;
    background: #000000;
    position: relative;
}

.ai-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.ai-tabs {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.ai-tab {
    padding: 30px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-left: 3px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ai-tab:hover, .ai-tab.active {
    background: rgba(244, 184, 68, 0.05);
    border-left-color: #f4b844;
}

.ai-tab-title {
    font-size: 20px;
    margin-bottom: 0;
    font-weight: 500;
    transition: margin-bottom 0.3s;
}

.ai-tab:hover .ai-tab-title {
    margin-bottom: 10px;
}

.ai-tab-description {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.4s ease;
}

.ai-tab:hover .ai-tab-description,
.ai-tab.active .ai-tab-description {
    max-height: 200px;
    opacity: 1;
    margin-top: 10px;
}

.ai-visual {
    height: 400px;
    background: radial-gradient(circle at center, rgba(244, 184, 68, 0.05) 0%, transparent 70%);
    border: 1px solid rgba(244, 184, 68, 0.2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.ai-visual img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

/* 导航高亮 */
.nav-links a.active {
    color: #f4b844;
}

/* 响应式 */
@media (max-width: 1024px) {
    .product-hero {
        min-height: 60vh;
    }

    .product-hero::before {
        font-size: 120px;
    }

    .product-hero-content {
        padding: 120px 40px 60px;
    }

    .hero-title {
        font-size: 40px;
    }

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

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .product-hero {
        min-height: 50vh;
    }

    .product-hero::before {
        font-size: 60px;
        letter-spacing: 10px;
    }

    .product-hero-content {
        padding: 100px 20px 40px;
    }

    .hero-title {
        font-size: 32px;
    }

    .features,
    .ai-system {
        padding: 80px 20px;
    }

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