/* --- 1. 全局变量与基础设置 (安防暗色系) --- */
:root {
    --sec-bg-dark: #1a1c23;     /* 深色背景 */
    --sec-panel: #252830;       /* 卡片背景 */
    --sec-green: #00e676;       /* 雷达/声纳绿 */
    --sec-blue: #2979ff;        /* 科技蓝 */
    --text-white: #ffffff;
    --text-gray: #b0bec5;
}

.hz-sec-wrapper {
    /* 正文：Open Sans Regular (400) */
    font-family: 'Open Sans', sans-serif;
    font-weight: 400;
    color: var(--text-white);
    line-height: 1.6;
    background-color: var(--sec-bg-dark);
    max-width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
    overflow-x: hidden; 
}

/* --- 2. Hero Section (强制全屏背景 + 声纳动画) --- */
.hz-sec-hero {
    background: radial-gradient(circle at center, #263238 0%, #000000 100%);
    padding: 120px 20px;
    text-align: center;
    position: relative;
    color: var(--text-white);
    
    /* 强制全屏宽带设置 */
    width: 100vw;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    box-sizing: border-box;
    overflow: hidden;
}

/* 声纳扩散动画容器 */
.hz-sonar-container {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* 波纹圈 */
.hz-sonar-ring {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid rgba(0, 230, 118, 0.6);
    border-radius: 50%;
    opacity: 0;
    box-shadow: 0 0 20px rgba(0, 230, 118, 0.2);
    animation: sonar-pulse 4s infinite linear;
}

.hz-sonar-ring:nth-child(1) { animation-delay: 0s; }
.hz-sonar-ring:nth-child(2) { animation-delay: 1.5s; }
.hz-sonar-ring:nth-child(3) { animation-delay: 3s; }

@keyframes sonar-pulse {
    0% { width: 50px; height: 50px; opacity: 0.8; border-width: 3px; }
    100% { width: 800px; height: 800px; opacity: 0; border-width: 0px; }
}

/* 中心雷达扫描线 */
.hz-radar-line {
    position: absolute;
    top: 50%; left: 50%;
    width: 300px; height: 300px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px dashed rgba(255,255,255,0.1);
    z-index: 1;
}
.hz-radar-line::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 50%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--sec-green));
    transform-origin: 0% 50%;
    animation: radar-sweep 3s infinite linear;
}

@keyframes radar-sweep { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Hero 文字内容 */
.hz-hero-content { position: relative; z-index: 2; max-width: 800px; margin: 0 auto; }

/* 标签：Poppins-SemiBold (600) */
.hz-sec-tag {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    color: var(--sec-green);
    border: 1px solid var(--sec-green);
    padding: 6px 14px;
    font-size: 13px;
    text-transform: uppercase;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 25px;
    letter-spacing: 2px;
    background: rgba(0, 230, 118, 0.1);
}

/* 主标题：Poppins-Medium (500) */
.hz-sec-title {
    font-family: 'Poppins', sans-serif;
    font-weight: 500 !important; /* 强制覆盖 */
    font-size: 52px; 
    margin-bottom: 20px; 
    line-height: 1.1;
    text-shadow: 0 0 30px rgba(0,230,118,0.3);
}

/* 副标题：Open Sans Regular (400) */
.hz-sec-subtitle { 
    font-family: 'Open Sans', sans-serif;
    font-weight: 400;
    font-size: 20px; 
    color: var(--text-gray); 
    margin-bottom: 40px; 
}

/* --- 3. Product Grid (产品展示) --- */
.hz-prod-section { padding: 80px 20px; background: var(--sec-bg-dark); }
.hz-prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 1200px; margin: 0 auto; }

.hz-prod-card {
    background: var(--sec-panel);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #333;
}
.hz-prod-card:hover { transform: translateY(-10px); box-shadow: 0 10px 30px rgba(0,0,0,0.5); border-color: var(--sec-green); }

.hz-card-img { height: 220px; background-color: #000; position: relative; overflow: hidden; }
.hz-card-img img { width: 100%; height: 100%; object-fit: cover; opacity: 0.8; transition: opacity 0.3s; }
.hz-prod-card:hover .hz-card-img img { opacity: 1; }

.hz-card-body { padding: 30px; }

/* 型号徽章：Poppins-SemiBold (600) */
.hz-model-badge { 
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    background: #37474f; 
    color: #fff; 
    padding: 4px 8px; 
    font-size: 12px; 
    border-radius: 4px; 
}

/* 卡片标题：Poppins-Medium (500) */
.hz-card-title { 
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    font-size: 24px; 
    margin: 15px 0; 
    color: var(--sec-green); 
}

/* 卡片正文：Open Sans Regular (400) */
.hz-card-desc { 
    font-family: 'Open Sans', sans-serif;
    font-weight: 400;
    font-size: 14px; 
    color: var(--text-gray); 
    margin-bottom: 20px; 
    min-height: 80px; 
}

.hz-specs-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid #444; padding-top: 15px; }
.hz-specs-list li { font-size: 13px; color: #fff; margin-bottom: 8px; display: flex; align-items: center; }
/* 列表强调：Poppins-SemiBold (600) */
.hz-specs-list li strong {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    margin-right: 5px;
}
.hz-specs-list li::before { content: '▪'; color: var(--sec-green); margin-right: 8px; font-size: 18px; }

/* --- 4. Detailed Description --- */
.hz-detail-section {
    background-color: var(--sec-bg-dark);
    padding: 80px 0;
    width: 100vw;
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    box-sizing: border-box;
}

.hz-detail-inner {
    max-width: 1200px; 
    margin: 0 auto;    
    padding: 0 20px;
}

.hz-detail-header { text-align: center; max-width: 800px; margin: 0 auto 60px auto; }

/* 章节标题：Poppins-Medium (500) */
.hz-detail-title {
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    font-size: 36px; 
    margin-bottom: 15px;
    background: linear-gradient(to right, #fff, var(--sec-green));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.hz-tech-block {
    display: flex; align-items: center; gap: 50px; background: var(--sec-panel); padding: 40px;
    border-radius: 12px; margin-bottom: 60px; border-left: 4px solid var(--sec-green);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.hz-tech-content { flex: 1; }
.hz-tech-img { flex: 1; min-width: 300px; }
.hz-tech-img img { width: 100%; border-radius: 8px; opacity: 0.9; }

/* 模块标题：Poppins-Medium (500) */
.hz-tech-h3 { 
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    color: var(--sec-green); 
    font-size: 24px; 
    margin-top: 0; 
    margin-bottom: 15px; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
}
.hz-tech-desc { color: var(--text-gray); font-size: 15px; margin-bottom: 20px; line-height: 1.6; }

.hz-tech-list { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.hz-tech-list li { background: rgba(255,255,255,0.05); padding: 10px; border-radius: 4px; font-size: 13px; border: 1px solid #333; }
/* 列表小标题：Poppins-SemiBold (600) */
.hz-tech-list li strong { 
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    color: #fff; 
    display: block; 
    margin-bottom: 4px; 
}

.hz-tech-block.reverse { flex-direction: row-reverse; border-left: none; border-right: 4px solid var(--sec-blue); }
.hz-tech-block.reverse .hz-tech-h3 { color: var(--sec-blue); }

/* 算法展示盒 */
.hz-algo-box { text-align: center; background: #121212; padding: 40px; border-radius: 12px; border: 1px dashed #444; margin-top: 60px; }
.hz-algo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 30px; }
.hz-algo-item span { font-size: 32px; display: block; margin-bottom: 10px; }

/* 算法小标题：Poppins-Medium (500) */
.hz-algo-item h4 { 
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    margin: 0 0 5px 0; 
    color: #fff; 
}
.hz-algo-item p { margin: 0; font-size: 13px; color: #888; }

/* --- 响应式设计 --- */
@media screen and (max-width: 900px) {
    .hz-sec-title { font-size: 36px; }
    .hz-prod-grid { grid-template-columns: 1fr; }
    .hz-tech-block, .hz-tech-block.reverse { flex-direction: column; }
    .hz-algo-grid { grid-template-columns: 1fr; }
}