:root {
    --hz-orange: #ec682e;
    --hz-orange-dark: #d3541c;
    --hz-blue-dark: #002B49;
    --hz-blue-mask: rgba(0, 43, 73, 0.6);
    --text-main: #333333;
    --text-sub: #666666;
    --border-line: #e6e6e6;
    --bg-gray: #f4f6f9;
}

/* --- 字体应用 --- */
.hz-logging-wrapper {
    font-family: 'Open Sans', sans-serif;
    font-weight: 400;
    color: var(--text-main);
    line-height: 1.6;
    background-color: #fff;
}

h1, h2, h3, .hz-section-title { 
    font-family: 'Poppins', sans-serif; 
    font-weight: 500; 
}

.hz-hero-tag, .hz-tool-cat, .hz-param-val, .hz-btn { 
    font-family: 'Poppins', sans-serif; 
    font-weight: 600; 
}

p, .hz-text-p, .hz-check-item, .hz-tool-desc, .hz-param-label { 
    font-family: 'Open Sans', sans-serif; 
    font-weight: 400; 
}

/* --- 1. Hero Banner --- */
.hz-hero {
    background: linear-gradient(var(--hz-blue-mask), rgba(0, 26, 44, 0.7)), 
                url('//ueeshop.ly200-cdn.com/u_file/UPBH/UPBH596/2602/11/photo/WellLogging1.png');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 160px 20px 220px 20px; /* 增加底部 padding 给悬浮卡片留位置 */
    text-align: center;
    position: relative;
}

.hz-hero-tag { color: var(--hz-orange); text-transform: uppercase; letter-spacing: 2px; font-size: 14px; margin-bottom: 20px; display: block; }
.hz-hero-title { font-size: 48px; margin-bottom: 20px; color: #fff; }
.hz-hero-desc { font-size: 18px; max-width: 800px; margin: 0 auto; color: rgba(255, 255, 255, 0.9); }

/* --- 2. RK1000B Floating Card (悬浮卡片形式) --- */
.hz-system-container {
    max-width: 1200px;
    margin: -120px auto 0 auto; /* 关键：负边距实现重合 */
    position: relative;
    z-index: 10;
    padding: 0 20px;
}

.hz-system-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 50px;
    padding: 50px;
    overflow: hidden;
}

.hz-sys-img { flex: 1.1; }
.hz-sys-img img { width: 100%; display: block; border-radius: 8px; }

.hz-sys-content { flex: 1; }
.hz-section-title { font-size: 32px; margin-bottom: 20px; color: var(--hz-blue-dark); }

.hz-check-list { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 25px; }
.hz-check-item { display: flex; align-items: center; font-size: 14px; color: var(--text-sub); }
.hz-check-item::before { content: '✔'; color: var(--hz-orange); margin-right: 10px; font-weight: bold; }

/* --- 3. Downhole Tools Section --- */
.hz-tools-section { padding: 120px 20px 80px 20px; background-color: var(--bg-gray); }
.hz-tools-header { text-align: center; margin-bottom: 60px; }
.hz-tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 1200px; margin: 0 auto; }

.hz-tool-card {
    background: #fff;
    border: 1px solid var(--border-line);
    border-radius: 8px;
    overflow: hidden;
    transition: 0.3s;
    display: flex; 
    flex-direction: column;
}
.hz-tool-card:hover { transform: translateY(-5px); border-color: var(--hz-orange); box-shadow: 0 10px 25px rgba(0,0,0,0.05); }

.hz-tool-img { width: 100%; height: 200px; overflow: hidden; }
.hz-tool-img img { width: 100%; height: 100%; object-fit: cover; }

.hz-tool-body { padding: 25px; flex: 1; display: flex; flex-direction: column; }
.hz-tool-cat { font-size: 11px; color: var(--hz-orange); text-transform: uppercase; margin-bottom: 8px; }
.hz-tool-title { font-size: 19px; margin-bottom: 12px; min-height: 50px; color: var(--hz-blue-dark); }
.hz-tool-desc { font-size: 14px; color: var(--text-sub); margin-bottom: 15px; flex: 1; }

.hz-param-box { background: #f9f9f9; padding: 12px; border-radius: 4px; margin-bottom: 20px; border-left: 2px solid var(--hz-orange); }
.hz-param-row { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 6px; border-bottom: 1px solid #eee; padding-bottom: 4px; }
.hz-param-row:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.hz-btn {
    display: inline-block;
    padding: 10px 25px;
    background-color: var(--hz-orange);
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    text-align: center;
    border: 1px solid var(--hz-orange);
    transition: 0.3s;
}
.hz-btn:hover { background-color: var(--hz-orange-dark); }

/* --- 响应式设计 --- */
@media screen and (max-width: 1024px) {
    .hz-system-card { padding: 30px; gap: 30px; }
}

@media screen and (max-width: 900px) {
    .hz-hero { padding: 100px 20px 140px 20px; }
    .hz-hero-title { font-size: 32px; }
    .hz-system-card { flex-direction: column; margin-top: -80px; }
    .hz-tools-grid { grid-template-columns: 1fr; }
    .hz-system-container { margin-top: -100px; }
}