body { font-family: 'PingFang SC', sans-serif; margin: 0; color: #262626; background: #fff; scroll-behavior: smooth; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Corporate Header */
header { background: #001529; color: #fff; padding: 15px 0; position: sticky; top: 0; z-index: 1000; }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo-v7 { font-size: 24px; font-weight: bold; }
.nav-v7 a { color: rgba(255,255,255,0.8); text-decoration: none; margin-left: 30px; font-size: 14px; }

/* Professional Hero */
.hero-v7 { 
    background: linear-gradient(rgba(0,21,41,0.85), rgba(0,21,41,0.95)), url('assets/hero-bg.jpg'); 
    background-size: cover;
    background-position: center;
    color: #fff; 
    padding: 140px 0; 
    position: relative; 
    overflow: hidden; 
}
.hero-v7::after { content: ''; position: absolute; right: -10%; top: -10%; width: 50%; height: 120%; background: rgba(24,144,255,0.1); transform: rotate(-15deg); }
.hero-v7 h1 { font-size: 3.5rem; margin-bottom: 25px; line-height: 1.2; }
.hero-v7 p { font-size: 1.2rem; opacity: 0.7; max-width: 600px; margin-bottom: 40px; }
.btn-pro { background: #1890ff; color: #fff; padding: 16px 40px; border-radius: 4px; text-decoration: none; font-weight: 500; display: inline-block; }

/* Case Studies */
.section-v7 { padding: 100px 0; }
.title-v7 { text-align: center; margin-bottom: 60px; }
.title-v7 h2 { font-size: 2.5rem; margin-bottom: 15px; }

.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 50px; }
.case-logo { background: #f5f5f5; height: 100px; display: flex; align-items: center; justify-content: center; border-radius: 8px; font-weight: bold; color: #bfbfbf; }

/* Industry Grid */
.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.industry-card { border: 1px solid #f0f0f0; padding: 40px; transition: all 0.3s; }
.industry-card:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.08); border-color: transparent; }
.industry-card h3 { font-size: 1.5rem; margin-bottom: 15px; color: #1890ff; }

/* Footer Pro */
footer { background: #001529; color: rgba(255,255,255,0.45); padding: 80px 0 40px; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; margin-bottom: 60px; }
.footer-grid h4 { color: #fff; margin-bottom: 20px; }
.copyright-v7 { text-align: center; padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 12px; }

/* 404 & Download */
.status-v7 { padding: 100px 0; text-align: center; color: #fff; background: #001529; min-height: 400px; }
.status-v7 h1 { font-size: 80px; }

@media (max-width: 992px) { .industry-grid, .case-grid, .footer-grid { grid-template-columns: 1fr 1fr; } .hero-v7 h1 { font-size: 2.5rem; } }