/**
 * Home App Features Widget
 * 首页App特性展示小工具样式
 * 借鉴 Teeno App Landing Page feature-area 设计风格
 */

.haf-feature-area {
    position: relative;
    padding: 80px 0 80px;
    background-color: #ffffff;
    overflow: hidden;
}

.haf-bg-light  { background-color: #ffffff; }
.haf-bg-gray   { background-color: #f5f7ff; }
.haf-bg-dark   { background-color: #1a1a2e; color: #ffffff; }
.haf-bg-primary { background-color: #f0f5ff; }

.haf-section-title {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}

.haf-subtitle {
    display: inline-block;
    background: rgba(34, 142, 214, 0.1);
    color: #228ed6;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 6px 16px;
    border-radius: 30px;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.haf-title {
    font-size: 38px;
    line-height: 1.25;
    font-weight: 800;
    color: #1a1a2e;
    margin: 0 0 16px;
    letter-spacing: -0.5px;
}

.haf-bg-dark .haf-title { color: #ffffff; }

.haf-desc {
    font-size: 16px;
    line-height: 1.7;
    color: #5a5a72;
    margin: 0;
}

.haf-bg-dark .haf-desc { color: #c0c0d0; }

.haf-features-row {
    margin-left: -0.75rem;
    margin-right: -0.75rem;
}

.haf-col {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
    margin-bottom: 24px;
}

/* 单个特性卡片（默认隐藏等待动画触发） */
.haf-single-feature {
    position: relative;
    background: #ffffff;
    border-radius: 16px;
    padding: 36px 28px;
    height: 100%;
    box-shadow: 0 4px 20px rgba(34, 41, 68, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

/* JS 进入视口时添加 .haf-animate 触发动画 */
.haf-single-feature.haf-animate {
    animation: haf-fadeInUp 0.7s ease forwards;
}

/* 用户禁用动画或浏览器不支持时直接显示 */
.haf-single-feature.haf-no-anim {
    opacity: 1;
    transform: none;
    animation: none;
}

.haf-bg-gray .haf-single-feature { background: #ffffff; }
.haf-bg-dark .haf-single-feature {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.haf-single-feature:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(34, 41, 68, 0.12);
}

.haf-bg-dark .haf-single-feature:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.haf-feature-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

/* 图标容器 */
.haf-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 76px;
    height: 76px;
    border-radius: 20px;
    margin-bottom: 24px;
    color: #ffffff;
    font-size: 32px;
    position: relative;
    transition: transform 0.3s ease;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.haf-single-feature:hover .haf-feature-icon {
    transform: scale(1.08) rotate(-4deg);
}

/* 渐变方案 - 借鉴 App 着陆页 gradient-1 ~ gradient-4 */
.haf-feature-icon.gradient-1 {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    box-shadow: 0 8px 20px rgba(106, 17, 203, 0.3);
}

.haf-feature-icon.gradient-2 {
    background: linear-gradient(135deg, #ff6a00 0%, #ee0979 100%);
    box-shadow: 0 8px 20px rgba(238, 9, 121, 0.3);
}

.haf-feature-icon.gradient-3 {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    box-shadow: 0 8px 20px rgba(17, 153, 142, 0.3);
}

.haf-feature-icon.gradient-4 {
    background: linear-gradient(135deg, #f7971e 0%, #ffd200 100%);
    box-shadow: 0 8px 20px rgba(247, 151, 30, 0.3);
}

/* 渐变方案扩展 */
.haf-feature-icon.gradient-5 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 8px 20px rgba(118, 75, 162, 0.3);
}

.haf-feature-icon.gradient-6 {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    box-shadow: 0 8px 20px rgba(250, 112, 154, 0.3);
}

/* 内容区 */
.haf-feature-content {
    position: relative;
    z-index: 1;
}

.haf-feature-title {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0 0 12px;
    line-height: 1.4;
    transition: color 0.25s ease;
}

.haf-bg-dark .haf-feature-title { color: #ffffff; }

.haf-feature-desc {
    font-size: 14px;
    line-height: 1.7;
    color: #6b7280;
    margin: 0;
}

.haf-bg-dark .haf-feature-desc { color: #b5b5c8; }

/* 卡片右上角装饰圆 */
.haf-single-feature::before {
    content: "";
    position: absolute;
    top: -40px;
    right: -40px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(34, 142, 214, 0.08), rgba(34, 142, 214, 0));
    pointer-events: none;
    transition: transform 0.4s ease;
}

.haf-single-feature:hover::before {
    transform: scale(1.4);
}

/* 淡入动画 */
@keyframes haf-fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 当用户禁用动画时的处理 */
.haf-no-animation .haf-single-feature {
    opacity: 1;
    transform: none;
    animation: none;
}

/* 响应式适配 */
@media (max-width: 991.98px) {
    .haf-feature-area {
        padding: 60px 0 60px;
    }

    .haf-title {
        font-size: 30px;
    }

    .haf-section-title {
        margin-bottom: 40px;
    }
}

@media (max-width: 767.98px) {
    .haf-feature-area {
        padding: 48px 0 48px;
    }

    .haf-title {
        font-size: 26px;
    }

    .haf-subtitle {
        font-size: 12px;
        padding: 4px 12px;
    }

    .haf-single-feature {
        padding: 28px 22px;
    }

    .haf-feature-icon {
        width: 60px;
        height: 60px;
        font-size: 26px;
        border-radius: 16px;
        margin-bottom: 18px;
    }

    .haf-feature-title {
        font-size: 17px;
    }

    .haf-feature-desc {
        font-size: 13px;
    }

    /* 移动端关闭交错动画以保证性能 */
    .haf-single-feature {
        animation-delay: 0s;
    }
}

@media (max-width: 575.98px) {
    .haf-title {
        font-size: 22px;
    }

    .haf-single-feature {
        padding: 24px 18px;
    }
}

/* 尊重用户 prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    .haf-single-feature {
        opacity: 1;
        transform: none;
        animation: none;
        transition: none;
    }

    .haf-single-feature:hover {
        transform: none;
    }

    .haf-single-feature:hover .haf-feature-icon {
        transform: none;
    }

    .haf-single-feature:hover::before {
        transform: none;
    }
}