/* 安全保障区域样式 - fetch.css */

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 强制居中样式 */
html, body {
    text-align: center;
}

/* 确保container完全居中 */
.security-section {
    text-align: center;
    width: 100%;
}

.security-section .container {
    text-align: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: block;
}

/* 安全保障区域 */
.security-section {
    background-color: #000;
    color: #fff;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 标题样式 */
.security-section .container h2.section-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center !important;
    margin-bottom: 20px;
    color: white !important;
    margin-left: auto !important;
    margin-right: auto !important;
    width: 100% !important;
    display: block !important;
    clear: both;
    position: relative;
    float: none !important;
    left: auto !important;
    right: auto !important;
    padding: 0;
    line-height: 1.3;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    text-decoration: none !important;
    text-underline-offset: none !important;
}

.section-subtitle {
    font-size: 1.1rem;
    text-align: center;
    color: #999;
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 安全视觉动画区域 */
.security-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 60px;
    position: relative;
    height: 400px;
}

.security-animation {
    display: block;
    margin: 0 auto;
    text-align: center;
}

.security-shield {
    display: block;
    margin: 0 auto;
    position: static;
    background: none;
    box-shadow: none;
}

.security-image {
    min-width: 700px;
    height: 200px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    background: none;
    animation: none; /* 移除动画效果 */
    -webkit-backface-visibility: hidden; /* 优化Safari性能 */
    -webkit-transform: translateZ(0); /* 优化webkit浏览器 */
}

@keyframes shieldGlow {
    0%, 100% {
        filter: drop-shadow(0 0 10px #1E90FF);
    }
    50% {
        filter: drop-shadow(0 0 20px #1E90FF);
    }
}

/* 安全特性卡片布局 */
.security-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-card {
    background: linear-gradient(145deg, rgba(26, 26, 26, 0.8), rgba(17, 17, 17, 0.8));
    padding: 30px;
    border-radius: 15px;
    border: 1px solid rgba(30, 144, 255, 0.2);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #0f0f0f, #070808);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1E90FF;
}

.feature-description {
    color: #ccc;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.feature-arrow {
    position: absolute;
    bottom: 30px;
    right: 30px;
    color: #1E90FF;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

/* 卡片悬停效果 */
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(30, 144, 255, 0.3);
}

.feature-card:hover .feature-arrow {
    transform: translateX(5px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .security-section .container h2.section-title {
        font-size: 2.5rem;
        color: white !important;
        text-align: center !important;
        margin-left: auto !important;
        margin-right: auto !important;
        width: 100% !important;
        display: block !important;
        float: none !important;
        text-decoration: none !important;
    }
    
    .security-visual {
        height: 350px;
    }
    
    .security-animation {
        display: block;
        margin: 0 auto;
        text-align: center;
    }
    
    .security-shield {
        display: block;
        margin: 0 auto;
        position: static;
        background: none;
        box-shadow: none;
    }
    
    .security-image {
        min-width: 500px;
        height: 180px;
        object-fit: contain;
        display: block;
        margin: 0 auto;
        background: none;
        animation: none;
        -webkit-backface-visibility: hidden;
        -webkit-transform: translateZ(0);
    }
    
    .security-features {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .security-section {
        padding: 60px 0;
    }
    
    .security-section .container h2.section-title {
        font-size: 2rem;
        color: white !important;
        text-align: center !important;
        margin-left: auto !important;
        margin-right: auto !important;
        width: 100% !important;
        display: block !important;
        float: none !important;
        text-decoration: none !important;
    }
    
    .section-subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
    }
    
    .security-visual {
        height: 300px;
    }
    
    .security-animation {
        display: block;
        margin: 0 auto;
        text-align: center;
    }
    
    .security-shield {
        display: block;
        margin: 0 auto;
        position: static;
        background: none;
        box-shadow: none;
    }
    
    .security-image {
        min-width: 300px;
        height: 150px;
        width: 100%;
        max-width: 700px;
        object-fit: contain;
        display: block;
        margin: 0 auto;
        background: none;
        animation: none;
        -webkit-backface-visibility: hidden;
        -webkit-transform: translateZ(0);
    }
    
    .security-features {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .security-section .container h2.section-title {
        font-size: 1.8rem;
        color: white !important;
        text-align: center !important;
        margin-left: auto !important;
        margin-right: auto !important;
        width: 100% !important;
        display: block !important;
        float: none !important;
        text-decoration: none !important;
    }
    
    .security-visual {
        height: 250px;
    }
    
    .security-animation {
        width: 180px;
        height: 180px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .feature-title {
        font-size: 1.3rem;
    }
}

/* IE11 兼容性修复 */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
    /* IE11 Flexbox 兼容 */
    .security-visual {
        display: -ms-flexbox;
        -ms-flex-pack: center;
        -ms-flex-align: center;
    }
    
    /* IE11 Grid 兼容 */
    .security-features {
        display: block;
    }
    
    .feature-card {
        margin-bottom: 20px;
    }
    
    /* IE11 渐变背景兼容 */
    .section-title {
        background: #fff;
        color: #fff;
    }
    
    /* IE11 动画降级 */
    @keyframes rotateAround {
        from { transform: rotate(0deg); }
        to { transform: rotate(360deg); }
    }
}

/* 交互动画效果 */
.feature-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 35px rgba(30, 144, 255, 0.4);
    border-color: rgba(30, 144, 255, 0.5);
}

/* 页面加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.security-section {
    animation: fadeIn 1s ease-out;
}

/* 滚动触发动画延迟 */
.section-title {
    animation: fadeIn 0.6s ease-out 0.2s both;
}

.section-subtitle {
    animation: fadeIn 0.6s ease-out 0.4s both;
}

.security-visual {
    animation: fadeIn 0.8s ease-out 0.6s both;
}

.feature-card:nth-child(1) {
    animation: fadeIn 0.8s ease-out 0.8s both;
}

.feature-card:nth-child(2) {
    animation: fadeIn 0.8s ease-out 1s both;
}

.feature-card:nth-child(3) {
    animation: fadeIn 0.8s ease-out 1.2s both;
}