/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.8;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(10, 36, 99, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}
.navbar.scrolled { background: rgba(10, 36, 99, 0.98); }
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 64px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 28px; }
.logo-text { color: #fff; font-size: 20px; font-weight: 700; letter-spacing: 2px; }
.nav-links { display: flex; list-style: none; gap: 8px; }
.nav-links a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 15px;
    transition: all 0.3s;
}
.nav-links a:hover { background: rgba(255,255,255,0.15); color: #fff; }
.nav-toggle { display: none; color: #fff; font-size: 24px; cursor: pointer; }

@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 64px; left: 0; right: 0;
        background: rgba(10, 36, 99, 0.98);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
    }
    .nav-links.active { display: flex; }
    .nav-links a { padding: 12px 16px; }
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a2463 0%, #1e5bb8 50%, #3d8bd4 100%);
    overflow: hidden;
}
.hero-overlay {
    position: absolute; inset: 0;
    background: url('images/banner.webp') center/cover no-repeat;
    opacity: 0.25;
}
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 80px 24px 40px;
    max-width: 800px;
}
.hero-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 120px; height: 120px;
    border-radius: 50%;
    border: 3px solid rgba(255,255,255,0.3);
    margin-bottom: 30px;
    position: relative;
}
.orbit-ring {
    position: absolute;
    width: 150px; height: 150px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    animation: rotate 8s linear infinite;
}
@keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.handshake { font-size: 48px; }
.hero-title {
    font-size: 42px;
    font-weight: 800;
    letter-spacing: 6px;
    margin-bottom: 12px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero-subtitle {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 30px;
    opacity: 0.9;
}
.hero-company { font-size: 22px; font-weight: 700; letter-spacing: 3px; margin-bottom: 8px; }
.hero-company-en { font-size: 14px; opacity: 0.7; margin-bottom: 6px; }
.hero-location { font-size: 16px; opacity: 0.8; margin-bottom: 30px; }
.hero-btn {
    display: inline-block;
    padding: 14px 40px;
    background: linear-gradient(135deg, #e8820c, #f5a623);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    transition: all 0.3s;
    box-shadow: 0 4px 20px rgba(232,130,12,0.4);
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 30px rgba(232,130,12,0.6); }
.hero-img-wrap { display: none; }

@media (max-width: 768px) {
    .hero-title { font-size: 28px; letter-spacing: 3px; }
    .hero-subtitle { font-size: 18px; }
    .hero-icon { width: 90px; height: 90px; }
    .handshake { font-size: 36px; }
    .orbit-ring { width: 110px; height: 110px; }
}

/* Common Section */
.section { padding: 80px 24px; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
    display: inline-block;
    background: #0a2463;
    color: #fff;
    padding: 6px 24px;
    font-size: 13px;
    letter-spacing: 1px;
    clip-path: polygon(0 0, 90% 0, 100% 100%, 0 100%);
    margin-bottom: 12px;
}
.section-tag-light {
    display: inline-block;
    background: #e8820c;
    color: #fff;
    padding: 6px 24px;
    font-size: 13px;
    letter-spacing: 1px;
    clip-path: polygon(0 0, 90% 0, 100% 100%, 0 100%);
    margin-bottom: 12px;
}
.section-title { font-size: 32px; color: #0a2463; font-weight: 800; letter-spacing: 3px; }
.section-title-light { font-size: 32px; color: #fff; font-weight: 800; letter-spacing: 3px; }
.title-arrow { color: #e8820c; }

/* About Section */
.about-section { background: #f5f7fa; }
.about-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    gap: 40px;
    align-items: flex-start;
}
.about-img {
    flex: 1;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}
.about-img img { width: 100%; display: block; }
.about-text { flex: 1; font-size: 16px; line-height: 2; color: #444; }
.about-text p { margin-bottom: 16px; text-indent: 2em; }

@media (max-width: 768px) {
    .about-content { flex-direction: column; }
    .about-img { width: 100%; }
}

/* Equipment Section */
.equipment-section { background: #0a2463; color: #fff; }
.equipment-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    gap: 40px;
    align-items: flex-start;
}
.equipment-img {
    flex: 1.2;
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid rgba(232,130,12,0.5);
}
.equipment-img img { width: 100%; display: block; }
.equipment-text { flex: 1; }
.equipment-text h3 { font-size: 22px; margin-bottom: 16px; color: #f5a623; }
.equipment-text ul { list-style: none; margin-bottom: 20px; }
.equipment-text li { padding: 6px 0; border-bottom: 1px solid rgba(255,255,255,0.1); font-size: 15px; }
.equipment-text li strong { color: #f5a623; }
.equipment-text p { font-size: 15px; margin-bottom: 14px; opacity: 0.9; }
.equipment-slogan {
    font-size: 18px; font-weight: 700; color: #f5a623;
    text-align: center; margin-top: 20px; letter-spacing: 3px;
}

@media (max-width: 768px) {
    .equipment-content { flex-direction: column; }
    .equipment-img { width: 100%; }
}

/* Products Section */
.products-section { background: #f5f7fa; }
.slogan-banner {
    text-align: center; font-size: 22px; font-weight: 800;
    color: #c0392b; letter-spacing: 3px; margin-bottom: 40px;
    padding: 16px;
    background: linear-gradient(90deg, transparent, rgba(192,57,43,0.05), transparent);
}
.slogan-banner-dark {
    text-align: center; font-size: 22px; font-weight: 800;
    color: #fff; letter-spacing: 3px; margin-bottom: 40px; padding: 16px;
}
.products-grid {
    max-width: 1100px; margin: 0 auto;
    display: grid; grid-template-columns: 1fr 1fr; gap: 30px;
}
.product-card {
    background: #fff; border-radius: 12px; overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 2px solid transparent;
}
.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    border-color: #e8820c;
}
.product-card img { width: 100%; display: block; }
.product-card h3 { padding: 16px 20px 8px; font-size: 18px; color: #0a2463; }
.product-card p { padding: 0 20px 20px; font-size: 14px; color: #666; line-height: 1.8; }

@media (max-width: 768px) {
    .products-grid { grid-template-columns: 1fr; }
}

/* Specs Section */
.specs-section { background: #0a2463; color: #fff; }
.specs-content {
    max-width: 1100px; margin: 0 auto;
    display: flex; gap: 40px; align-items: flex-start;
}
.specs-img {
    flex: 1; border-radius: 12px; overflow: hidden;
    border: 2px solid rgba(232,130,12,0.5);
}
.specs-img img { width: 100%; display: block; }
.specs-text { flex: 1; }
.specs-text h3 { font-size: 22px; margin-bottom: 20px; color: #f5a623; }
.spec-table h4 { font-size: 18px; margin: 20px 0 10px; color: #f5a623; }
.spec-table table { width: 100%; border-collapse: collapse; margin-bottom: 16px; font-size: 14px; }
.spec-table th { background: rgba(232,130,12,0.3); padding: 10px 12px; text-align: center; font-weight: 600; }
.spec-table td { padding: 8px 12px; text-align: center; border-bottom: 1px solid rgba(255,255,255,0.1); }
.spec-table tr:nth-child(even) td { background: rgba(255,255,255,0.05); }
.spec-note { margin-top: 12px; font-size: 13px; color: #e8820c; line-height: 1.8; }
.patent-info {
    margin-top: 30px; padding: 24px;
    background: rgba(255,255,255,0.08); border-radius: 12px;
    border-left: 4px solid #e8820c;
}
.patent-info h3 { font-size: 20px; margin-bottom: 10px; color: #f5a623; }
.patent-info p { font-size: 15px; opacity: 0.9; }

@media (max-width: 768px) {
    .specs-content { flex-direction: column; }
    .specs-img { width: 100%; }
}

/* Contact Section */
.contact-section { background: #f5f7fa; }
.contact-content { max-width: 900px; margin: 0 auto; text-align: center; }
.contact-content h2 {
    font-size: 32px; color: #0a2463; font-weight: 800;
    letter-spacing: 3px; margin-bottom: 40px;
}
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.contact-item {
    background: #fff; padding: 30px 20px; border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: transform 0.3s;
}
.contact-item:hover { transform: translateY(-4px); }
.contact-icon { font-size: 36px; display: block; margin-bottom: 12px; }
.contact-item h4 { font-size: 16px; color: #0a2463; margin-bottom: 6px; }
.contact-item p { font-size: 14px; color: #666; }

@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
}

/* Footer */
.footer {
    background: #0a2463; color: rgba(255,255,255,0.7);
    text-align: center; padding: 24px;
    font-size: 13px; letter-spacing: 1px;
}

/* Language Toggle */
.nav-right { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
    display: flex; align-items: center; gap: 6px;
    background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.3);
    color: #fff; padding: 6px 14px; border-radius: 20px;
    cursor: pointer; font-size: 14px; font-weight: 600;
    letter-spacing: 1px; transition: all 0.3s;
}
.lang-toggle:hover { background: rgba(255,255,255,0.25); border-color: rgba(255,255,255,0.5); }
.lang-icon { font-size: 16px; }
@media (max-width: 768px) {
    .lang-toggle { font-size: 13px; padding: 5px 10px; }
}