/* ===== Product Core Features Cards ===== */

/* ===== 终端核心功能 — 科技风卡片 ===== */
.core-features-title {
    font-size: 42px;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0 0 12px;
    letter-spacing: -0.5px;
}

.core-features-subtitle {
    font-size: 16px;
    color: #888;
    margin: 0 0 50px;
    font-weight: 400;
}

.core-features-row {
    margin: 0 -12px;
}

.core-features-row > [class*="col-"] {
    padding: 0 12px;
    margin-bottom: 24px;
}

.core-feature-card {
    position: relative;
    width: 100%;
    background: linear-gradient(145deg, #ffffff 0%, #f8f9fb 50%, #f0f2f5 100%);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 20px;
    padding: 40px 28px 32px;
    text-align: center;
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.core-feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 24px 48px rgba(255, 126, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: rgba(255, 126, 0, 0.2);
}

/* 顶部渐变装饰线 */
.core-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 3px;
    background: linear-gradient(90deg, transparent, #FF7E00, #FF9500, transparent);
    opacity: 0;
    transition: opacity 0.4s ease, left 0.4s ease, right 0.4s ease;
}

.core-feature-card:hover::before {
    opacity: 1;
    left: 10%;
    right: 10%;
}

/* 背景光晕 */
.core-feature-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(255, 126, 0, 0.03) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.core-feature-card:hover .core-feature-glow {
    opacity: 1;
}

/* 图标区域 */
.core-feature-icon-wrap {
    position: relative;
    width: 90px;
    height: 90px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.core-feature-icon-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(255, 126, 0, 0.08) 0%, rgba(255, 149, 0, 0.04) 100%);
    border: 1px solid rgba(255, 126, 0, 0.12);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.core-feature-card:hover .core-feature-icon-bg {
    background: linear-gradient(135deg, rgba(255, 126, 0, 0.15) 0%, rgba(255, 149, 0, 0.08) 100%);
    border-color: rgba(255, 126, 0, 0.25);
    transform: scale(1.08);
    box-shadow: 0 8px 32px rgba(255, 126, 0, 0.15);
}

.core-feature-icon-img {
    position: relative;
    z-index: 1;
    width: 48px;
    height: 48px;
    object-fit: contain;
    transition: transform 0.4s ease;
}

.core-feature-card:hover .core-feature-icon-img {
    transform: scale(1.1);
}

/* 功能名称 */
.core-feature-name {
    font-size: 20px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 10px;
    letter-spacing: -0.3px;
}

/* 功能描述 */
.core-feature-desc {
    font-size: 14px;
    color: #777;
    line-height: 1.7;
    margin: 0;
}

/* 底部装饰线 */
.core-feature-line {
    width: 40px;
    height: 2px;
    margin: 20px auto 0;
    background: linear-gradient(90deg, transparent, rgba(255, 126, 0, 0.4), transparent);
    border-radius: 1px;
    transition: width 0.4s ease;
}

.core-feature-card:hover .core-feature-line {
    width: 60px;
}

/* 响应式 */
@media (max-width: 991px) {
    .core-features-title { font-size: 36px; }
    .core-feature-card { padding: 32px 24px 28px; }
    .core-feature-icon-wrap { width: 80px; height: 80px; }
    .core-feature-icon-img { width: 40px; height: 40px; }
}

@media (max-width: 767px) {
    .core-features-title { font-size: 28px; }
    .core-features-subtitle { font-size: 14px; margin-bottom: 36px; }
    .core-feature-card { padding: 28px 20px 24px; }
    .core-feature-name { font-size: 18px; }
}