body {
    position: relative;  /* 第一份没有此属性，保留 */
}

/* ========== 按钮 ========== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 15px 28px; border-radius: 50px; font-weight: 600; font-size: 1rem; text-decoration: none; cursor: pointer; border: none; transition: var(--transition); white-space: nowrap; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; box-shadow: 0 8px 30px var(--primary-glow); }
.btn-outline { background: rgba(255,255,255,0.05); color: var(--primary); border: 1px solid var(--primary); }

/* ========== 英雄区域 ========== */
.hero { position: relative; padding: 90px 24px 100px; overflow: hidden; min-height: 85vh; display: flex; align-items: center; background: radial-gradient(...); }
.hero-inner { max-width: var(--max-width); margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.hero-content h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 800; color: var(--white); text-shadow: 0 0 25px rgba(0,212,255,0.3); margin-bottom: 20px; }
.hero-content h1 .highlight { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-content p { color: var(--text-light); font-size: 1.15rem; margin-bottom: 32px; max-width: 500px; }
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual { position: relative; }
.hero-card { background: var(--glass-bg); border-radius: var(--radius-lg); padding: 32px 28px; border: 1px solid var(--glass-border); backdrop-filter: blur(16px); max-width: 400px; margin: 0 auto; }
.hero-card .card-badge { display: inline-block; background: rgba(0,212,255,0.15); color: var(--primary); font-size: 0.8rem; padding: 6px 14px; border-radius: 50px; margin-bottom: 14px; border: 1px solid rgba(0,212,255,0.3); }
.hero-card h3 { color: var(--white); margin-bottom: 8px; font-size: 1.3rem; }
.hero-card .card-stats { display: flex; gap: 20px; margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); }
.hero-card .stat-num { font-size: 1.5rem; font-weight: 700; background: linear-gradient(to right, var(--primary), #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-card .stat-label { font-size: 0.8rem; color: var(--text-lighter); }
        .floating-badge {
            position: absolute; background: rgba(15,25,45,0.8); backdrop-filter: blur(16px);
            border-radius: 50px; padding: 10px 20px;
            box-shadow: 0 8px 28px rgba(0,0,0,0.5), 0 0 20px rgba(0,212,255,0.2);
            font-weight: 600; font-size: 0.85rem; display: flex; align-items: center; gap: 8px;
            border: 1px solid rgba(0,212,255,0.3); z-index: 3;
            animation: floatUpDown 4s ease-in-out infinite;
        }
        .floating-badge.fb1 { top: -10px; right: -20px; animation-delay: 0s; }
        .floating-badge.fb2 { bottom: -15px; left: -25px; animation-delay: 2s; }
        .floating-badge .dot { width: 10px; height: 10px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 12px #22c55e; animation: pulse-dot 1.8s infinite; }
        @keyframes floatUpDown { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
        @keyframes pulse-dot { 0%,100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.8); } 50% { box-shadow: 0 0 0 14px rgba(34,197,94,0); } }

/* ========== 通用区块 ========== */
.section { padding: 70px 24px; position: relative; }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-label { display: inline-block; font-size: 0.85rem; font-weight: 600; color: var(--primary); background: rgba(0,212,255,0.1); padding: 6px 18px; border-radius: 50px; letter-spacing: 0.04em; text-transform: uppercase; border: 1px solid rgba(0,212,255,0.25); backdrop-filter: blur(10px); margin-bottom: 16px; }
.section-title { font-size: clamp(1.7rem, 3.5vw, 2.4rem); font-weight: 700; color: var(--white); text-shadow: 0 0 15px rgba(0,212,255,0.3); margin-bottom: 16px; }
.section-desc { color: var(--text-light); max-width: 600px; margin: 0 auto 40px; font-size: 1.05rem; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ========== 网格布局 ========== */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-image { background: linear-gradient(135deg, rgba(0,212,255,0.2), rgba(123,47,247,0.2)); border-radius: var(--radius-lg); height: 300px; overflow: hidden; }
.about-image img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ========== 卡片 ========== */
.glass-card { background: var(--glass-bg); border: 1px solid var(--glass-border); backdrop-filter: blur(16px); transition: var(--transition); border-radius: var(--radius); }
.glass-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: 0 15px 30px rgba(0,0,0,0.5), 0 0 20px rgba(0,212,255,0.2); }
.service-card { padding: 0; text-align: left; overflow: hidden; cursor: pointer; }
.service-img { height: 160px; overflow: hidden; }
.service-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.service-info { padding: 20px; }
.service-info h3 { font-size: 1.1rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.service-info p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }
.case-card { overflow: hidden; }
.case-img { height: 150px; overflow: hidden; }
.case-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.case-info { padding: 18px; }
.case-info h4 { font-weight: 700; color: var(--white); margin-bottom: 4px; font-size: 1rem; }
.case-info p { font-size: 0.85rem; color: var(--text-lighter); }
.step-card { padding: 20px; text-align: center; }
.step-num { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto 10px; }
.step-card h4 { font-weight: 700; color: var(--white); margin-bottom: 4px; font-size: 1rem; }
.step-card p { font-size: 0.8rem; color: var(--text-lighter); }
.article-card { background: var(--glass-bg); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--glass-border); transition: var(--transition); }
.article-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: 0 15px 30px rgba(0,0,0,0.5); }
.article-card .case-info h4 { font-weight: 700; color: var(--white); margin-bottom: 4px; font-size: 1rem; }
.article-card .case-info p { font-size: 0.85rem; color: var(--text-lighter); }

/* ========== FAQ ========== */
.faq-item { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius); margin-bottom: 20px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--primary); box-shadow: 0 0 15px rgba(0,212,255,0.15); }
.faq-question { padding: 20px 24px; font-weight: 600; color: var(--white); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: background 0.3s; }
.faq-question:hover { background: rgba(0,212,255,0.05); }
.faq-icon { font-size: 1.4rem; color: var(--primary); transition: transform 0.3s; flex-shrink: 0; margin-left: 16px; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; padding: 0 24px; color: var(--text-light); line-height: 1.8; text-align: left; margin-bottom: 0; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 24px; }

/* ========== 友情链接 ========== */
.links-flex { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.links-flex a { color: var(--text-lighter); text-decoration: none; font-size: 0.9rem; padding: 6px 14px; border-radius: 50px; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.1); transition: var(--transition); }
.links-flex a:hover { color: var(--primary); border-color: var(--primary); }

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-5 { grid-template-columns: repeat(3, 1fr); }
    .grid-6 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-buttons { justify-content: center; }
    .hero-visual { order: -1; }
    .floating-badge { display: none; }
    .about-grid { grid-template-columns: 1fr; }
    .about-image { height: 200px; order: -1; }
    .service-grid { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr; }
    .grid-5 { grid-template-columns: repeat(2, 1fr); }
    .grid-6 { grid-template-columns: 1fr; }
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
}
.case-info h4 a {
    color: white;
    text-decoration: none;
}