:root {
    --primary: #0a1628;
    --primary-light: #1a2d4a;
    --accent: #c9a84c;
    --accent-light: #e8d48b;
    --text: #2c3e50;
    --text-light: #7f8c8d;
    --bg: #f8f9fa;
    --white: #ffffff;
    --border: #e8e8e8;
    --shadow: 0 2px 12px rgba(10,22,40,0.08);
    --shadow-lg: 0 8px 30px rgba(10,22,40,0.12);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); line-height: 1.7; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.header { background: var(--primary); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 0 20px; max-width: 1200px; margin: 0 auto; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 40px; height: 40px; background: var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 20px; color: var(--primary); font-weight: bold; }
.logo-text { color: var(--white); font-size: 18px; font-weight: 600; }
.logo-text span { color: var(--accent); }
.nav { display: flex; gap: 0; }
.nav a { color: rgba(255,255,255,0.8); padding: 0 18px; height: 70px; display: flex; align-items: center; font-size: 15px; transition: all 0.3s; border-bottom: 3px solid transparent; }
.nav a:hover, .nav a.active { color: var(--accent); border-bottom-color: var(--accent); background: rgba(255,255,255,0.05); }
.header-phone { color: var(--accent); font-size: 16px; font-weight: 600; }
.header-phone a { color: var(--accent); }

/* Hero Carousel */
.hero-carousel { position: relative; min-height: 520px; overflow: hidden; }
.carousel-slides { position: relative; width: 100%; min-height: 520px; }
.carousel-slide { position: absolute; top: 0; left: 0; width: 100%; min-height: 520px; background-size: cover; background-position: center; display: flex; align-items: center; opacity: 0; transition: opacity 1s ease-in-out; z-index: 0; }
.carousel-slide.active { opacity: 1; z-index: 1; }
.carousel-slide::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 80px; background: linear-gradient(transparent, var(--bg)); z-index: 1; }
.carousel-dots { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); display: flex; gap: 12px; z-index: 10; }
.carousel-dots .dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.4); cursor: pointer; transition: all 0.3s; border: 2px solid transparent; }
.carousel-dots .dot.active { background: var(--accent); border-color: var(--accent-light); transform: scale(1.2); }
.carousel-dots .dot:hover { background: rgba(255,255,255,0.7); }
.hero-content { position: relative; z-index: 2; }
.hero-content h1 { color: var(--white); font-size: 42px; font-weight: 700; margin-bottom: 16px; line-height: 1.3; }
.hero-content h1 span { color: var(--accent); }
.hero-content p { color: rgba(255,255,255,0.85); font-size: 18px; margin-bottom: 30px; max-width: 600px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 14px 32px; border-radius: 6px; font-size: 16px; font-weight: 600; transition: all 0.3s; cursor: pointer; border: none; }
.btn-primary { background: var(--accent); color: var(--primary); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* Section */
.section { padding: 70px 0; }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 32px; color: var(--primary); margin-bottom: 12px; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 3px; background: var(--accent); margin: 16px auto 0; }
.section-title p { color: var(--text-light); font-size: 16px; }

/* Services Grid */
.services-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.service-card { background: var(--white); border-radius: 12px; padding: 0; box-shadow: var(--shadow); transition: all 0.3s; overflow: hidden; border-top: 3px solid transparent; }
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-top-color: var(--accent); }
.service-card img { width: 100%; height: 200px; object-fit: cover; display: block; }
.service-card .card-body { padding: 20px 24px 24px; }
.service-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 10px; }
.service-card p { color: var(--text-light); font-size: 14px; line-height: 1.6; }

/* Advantages */
.advantages { background: var(--primary); color: var(--white); }
.advantages .section-title h2 { color: var(--white); }
.advantages .section-title p { color: rgba(255,255,255,0.6); }
.adv-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 30px; }
.adv-item { text-align: center; padding: 20px; }
.adv-item .num { font-size: 48px; font-weight: 700; color: var(--accent); margin-bottom: 10px; }
.adv-item h3 { font-size: 18px; margin-bottom: 8px; }
.adv-item p { color: rgba(255,255,255,0.6); font-size: 14px; }

/* Process Steps */
.process-steps { display: flex; gap: 0; position: relative; flex-wrap: wrap; justify-content: center; }
.process-step { flex: 1; min-width: 160px; text-align: center; padding: 20px; position: relative; }
.process-step .step-num { width: 50px; height: 50px; background: var(--accent); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; margin: 0 auto 16px; position: relative; z-index: 1; }
.process-step h4 { font-size: 16px; color: var(--primary); margin-bottom: 8px; }
.process-step p { color: var(--text-light); font-size: 13px; }

/* Cases */
.cases-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 24px; }
.case-card { background: var(--white); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); transition: all 0.3s; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card img { width: 100%; height: 240px; object-fit: cover; }
.case-card .info { padding: 20px; }
.case-card h3 { font-size: 16px; color: var(--primary); margin-bottom: 8px; }
.case-card p { color: var(--text-light); font-size: 14px; }

/* News Section */
.news-section { background: var(--bg); }
.news-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }
.news-card { background: var(--white); border-radius: 12px; padding: 28px 24px; box-shadow: var(--shadow); transition: all 0.3s; display: block; border-left: 4px solid transparent; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-left-color: var(--accent); }
.news-card .news-date { color: var(--accent); font-size: 13px; font-weight: 600; margin-bottom: 10px; }
.news-card h3 { font-size: 17px; color: var(--primary); margin-bottom: 10px; line-height: 1.5; }
.news-card p { color: var(--text-light); font-size: 14px; line-height: 1.6; }

/* CTA */
.cta { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); padding: 60px 0; text-align: center; }
.cta h2 { color: var(--white); font-size: 28px; margin-bottom: 12px; }
.cta p { color: rgba(255,255,255,0.7); font-size: 16px; margin-bottom: 24px; }
.cta .phone { color: var(--accent); font-size: 32px; font-weight: 700; }

/* Footer */
.footer { background: var(--primary); color: rgba(255,255,255,0.6); padding: 40px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
.footer h4 { color: var(--white); font-size: 16px; margin-bottom: 16px; }
.footer p, .footer li { font-size: 14px; line-height: 2; }
.footer a { color: rgba(255,255,255,0.6); transition: color 0.3s; }
.footer a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; text-align: center; font-size: 13px; }

/* Breadcrumb */
.breadcrumb { background: var(--white); padding: 16px 0; border-bottom: 1px solid var(--border); }
.breadcrumb a { color: var(--text-light); font-size: 14px; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text-light); margin: 0 8px; }
.breadcrumb .current { color: var(--primary); font-weight: 600; }

/* Page Banner */
.page-banner { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); padding: 60px 0 50px; text-align: center; }
.page-banner h1 { color: var(--white); font-size: 36px; margin-bottom: 10px; }
.page-banner p { color: rgba(255,255,255,0.6); font-size: 16px; }

/* Content */
.content { padding: 50px 0; }
.content h2 { font-size: 24px; color: var(--primary); margin: 30px 0 16px; padding-left: 16px; border-left: 4px solid var(--accent); }
.content h3 { font-size: 18px; color: var(--primary); margin: 20px 0 10px; }
.content p { margin-bottom: 16px; color: var(--text); }
.content ul { margin: 10px 0 20px 20px; }
.content li { margin-bottom: 8px; }

/* Contact Box */
.contact-box { background: var(--white); border-radius: 12px; padding: 40px; box-shadow: var(--shadow); margin: 30px 0; display: flex; gap: 40px; align-items: center; flex-wrap: wrap; }
.contact-info { flex: 1; min-width: 280px; }
.contact-info h3 { font-size: 22px; color: var(--primary); margin-bottom: 16px; }
.contact-info p { margin-bottom: 10px; font-size: 15px; }
.contact-info .phone-big { font-size: 28px; color: var(--accent); font-weight: 700; }

/* FAQ */
.faq-item { background: var(--white); border-radius: 8px; margin-bottom: 12px; box-shadow: var(--shadow); overflow: hidden; }
.faq-item summary { padding: 18px 24px; font-size: 16px; font-weight: 600; color: var(--primary); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::after { content: '+'; font-size: 20px; color: var(--accent); }
.faq-item[open] summary::after { content: '-'; }
.faq-item .answer { padding: 0 24px 18px; color: var(--text-light); font-size: 14px; line-height: 1.8; }

/* Responsive */
@media (max-width: 768px) {
    .header-inner { flex-wrap: wrap; height: auto; padding: 12px 20px; }
    .nav { order: 3; width: 100%; overflow-x: auto; }
    .nav a { padding: 0 12px; font-size: 13px; height: 44px; white-space: nowrap; }
    .hero-content h1 { font-size: 28px; }
    .hero-content p { font-size: 15px; }
    .section { padding: 40px 0; }
    .section-title h2 { font-size: 24px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .process-steps { flex-direction: column; }
}