* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.8;
    color: #333;
    background: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: #1a1a1a;
    padding: 20px 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    color: #ff6600;
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 40px;
}

.nav a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: #ff6600;
}

.banner {
    background: linear-gradient(135deg, #000 0%, #1a1a1a 50%, #000 100%);
    padding: 120px 0;
    text-align: center;
    color: #fff;
}

.banner-content h1 {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.banner-content p {
    font-size: 18px;
    color: #999;
    margin-bottom: 40px;
}

.banner-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-main {
    display: inline-block;
    padding: 14px 36px;
    background: #ff6600;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
}

.btn-main:hover {
    background: #cc5200;
}

.btn-sub {
    display: inline-block;
    padding: 14px 36px;
    background: transparent;
    color: #fff;
    border: 2px solid #ff6600;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
}

.btn-sub:hover {
    background: #ff6600;
}

.section {
    padding: 80px 0;
}

.section-gray {
    background: #f5f5f5;
}

.section-title {
    text-align: center;
    margin-bottom: 20px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.title-line {
    width: 60px;
    height: 3px;
    background: #ff6600;
    margin: 0 auto;
}

.section-desc {
    text-align: center;
    color: #666;
    font-size: 16px;
    margin-bottom: 50px;
}

.services-tabs {
    max-width: 950px;
    margin: 0 auto;
}

.tab-nav {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-bottom: 30px;
    border-bottom: 2px solid #e0e0e0;
}

.tab-btn {
    padding: 18px 40px;
    background: transparent;
    border: none;
    font-size: 16px;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    bottom: -2px;
}

.tab-btn:hover {
    color: #ff6600;
}

.tab-btn.active {
    color: #ff6600;
    border-bottom: 4px solid #ff6600;
    font-weight: 700;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-detail {
    background: linear-gradient(135deg, #fff 0%, #f9f9f9 100%);
    padding: 60px 50px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.service-icon {
    font-size: 72px;
    margin-bottom: 30px;
}

.service-detail h3 {
    font-size: 30px;
    margin-bottom: 18px;
    color: #1a1a1a;
}

.service-detail p {
    color: #666;
    font-size: 17px;
    margin-bottom: 30px;
}

.service-tags {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.service-tags span {
    background: #f0f0f0;
    color: #333;
    padding: 10px 22px;
    font-size: 15px;
    border-radius: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 20px;
}

.feature-num {
    font-size: 48px;
    font-weight: 700;
    color: #ff6600;
    margin-bottom: 15px;
    opacity: 0.8;
}

.feature-item h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #1a1a1a;
}

.feature-item p {
    color: #666;
    font-size: 15px;
}

.about-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    color: #666;
    font-size: 16px;
    margin-bottom: 20px;
}

.about-stats {
    display: flex;
    gap: 50px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
}

.stat-val {
    font-size: 42px;
    font-weight: 700;
    color: #ff6600;
    margin-bottom: 8px;
}

.stat-name {
    color: #666;
    font-size: 15px;
}

.about-img img {
    width: 100%;
    border: 3px solid #e0e0e0;
}

.contact-info {
    max-width: 600px;
    text-align: center;
}

.contact-item {
    margin-bottom: 35px;
}

.contact-label {
    font-size: 14px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.contact-value,
.contact-value a {
    color: #1a1a1a;
    font-size: 20px;
    font-weight: 600;
    text-decoration: none;
}

.contact-value a:hover {
    color: #ff6600;
}

.footer {
    background: #1a1a1a;
    color: #888;
    padding: 40px 0 30px;
    text-align: left;
}

.footer .section-title {
    text-align: left;
}

.footer .section-title h2 {
    color: #fff;
    font-size: 28px;
}

.footer .section-title .title-line {
    background: #ff6600;
    margin-left: 0;
}

.footer .section-desc {
    color: #aaa;
    font-size: 15px;
    margin-bottom: 30px;
    text-align: left;
}

.footer .contact-info {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 40px;
    flex-wrap: wrap;
}

.footer .contact-item {
    margin-bottom: 0;
    text-align: left;
    flex: 0 0 auto;
}

.footer .contact-label {
    font-size: 11px;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.footer .contact-value,
.footer .contact-value a {
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    line-height: 1.5;
}

.footer .contact-value a:hover {
    color: #ff6600;
}

.footer .copyright {
    color: #666;
    margin-top: 35px;
    padding-top: 25px;
    border-top: 1px solid #333;
    font-size: 13px;
    text-align: center;
}

.footer p {
    font-size: 13px;
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .banner-content h1 {
        font-size: 36px;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .about-box {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: column;
        gap: 24px;
    }

    .services-list {
        grid-template-columns: 1fr;
    }
}