/* ========================================
   IDC 服务宣传页 - 自定义样式
   基于 index.html 的 Material Design 3 主题
   ======================================== */

/* --- Hero 视觉区 --- */
.hero-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 40px 0;
}

.hero-icon {
    font-size: 160px !important;
    color: var(--md-sys-color-primary);
    filter: drop-shadow(0 8px 32px color-mix(in srgb, var(--md-sys-color-primary) 30%, transparent));
    animation: float-cloud 6s ease-in-out infinite;
}

@keyframes float-cloud {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}

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

.stat-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--md-sys-color-surface-variant);
    padding: 10px 18px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
    box-shadow: var(--card-shadow-soft);
    transition: var(--transition);
}

.stat-badge .material-symbols-outlined {
    font-size: 20px !important;
    color: var(--md-sys-color-primary);
}

.stat-badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover);
}

/* --- 技术优势区域 --- */
.advantages {
    padding: 80px 0;
}

.advantages-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.advantage-card {
    text-align: center;
}

.advantage-icon {
    font-size: 48px !important;
    color: var(--md-sys-color-primary);
    margin-bottom: 16px;
    display: block;
}

.advantage-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--md-sys-color-on-surface);
}

.advantage-card p {
    font-size: 15px;
    line-height: 1.7;
    color: color-mix(in srgb, var(--md-sys-color-on-surface) 82%, transparent);
}

.advantage-card strong {
    color: var(--md-sys-color-primary);
    font-weight: 600;
}

/* --- 产品特性区域 --- */
.features {
    padding: 80px 0;
    background-color: var(--md-sys-color-surface-variant);
    transition: background-color var(--theme-transition-duration) ease;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    border-radius: 20px;
    background-color: var(--md-sys-color-surface);
    box-shadow: var(--card-shadow-soft);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.feature-icon {
    font-size: 36px !important;
    color: var(--md-sys-color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--md-sys-color-on-surface);
}

.feature-item p {
    font-size: 14px;
    line-height: 1.6;
    color: color-mix(in srgb, var(--md-sys-color-on-surface) 76%, transparent);
}

/* --- 规格方案区域 --- */
.pricing {
    padding: 80px 0;
}

.pricing-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    align-items: stretch;
}

.pricing-card {
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
    position: relative;
    overflow: visible;
}

.pricing-card.featured {
    border: 2px solid var(--md-sys-color-primary);
    transform: scale(1.04);
    z-index: 2;
}

.pricing-card.featured:hover {
    transform: scale(1.04) translateY(-8px);
}

.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    padding: 4px 20px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.pricing-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid color-mix(in srgb, var(--md-sys-color-outline) 24%, transparent);
}

.pricing-tier-icon {
    font-size: 48px !important;
    color: var(--md-sys-color-primary);
    margin-bottom: 8px;
}

.pricing-header h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--md-sys-color-on-surface);
}

.price-tag {
    font-size: 20px;
    font-weight: 500;
    color: var(--md-sys-color-primary);
}

.pricing-specs {
    list-style: none;
    padding: 0;
    margin: 0 0 24px 0;
    flex: 1;
}

.pricing-specs li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    color: var(--md-sys-color-on-surface);
    border-bottom: 1px solid color-mix(in srgb, var(--md-sys-color-outline) 12%, transparent);
}

.pricing-specs li:last-child {
    border-bottom: none;
}

.pricing-specs li .material-symbols-outlined {
    font-size: 22px !important;
    color: var(--md-sys-color-primary);
    flex-shrink: 0;
}

.pricing-footer {
    text-align: center;
    padding-top: 16px;
}

.pricing-target {
    font-size: 13px;
    color: color-mix(in srgb, var(--md-sys-color-on-surface) 64%, transparent);
    font-weight: 500;
}

/* --- 适用场景区域 --- */
.use-cases {
    padding: 80px 0;
    background-color: var(--md-sys-color-surface-variant);
    transition: background-color var(--theme-transition-duration) ease;
}

.use-cases-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.use-case-card {
    text-align: center;
}

.use-case-card .material-symbols-outlined {
    font-size: 48px !important;
    color: var(--md-sys-color-primary);
    margin-bottom: 16px;
    display: block;
}

.use-case-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--md-sys-color-on-surface);
}

.use-case-card p {
    font-size: 15px;
    line-height: 1.6;
    color: color-mix(in srgb, var(--md-sys-color-on-surface) 76%, transparent);
}

/* --- 响应式适配 --- */
@media (max-width: 768px) {
    .hero-icon {
        font-size: 100px !important;
    }

    .hero-stat-badges {
        flex-direction: column;
        align-items: center;
    }

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

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-8px);
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 480px) {
    .hero-icon {
        font-size: 72px !important;
    }

    .feature-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}