/* ========== Reset ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif; line-height: 1.6; color: #333; background: #fff; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }

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

/* ========== Header ========== */
.header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.08); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; max-width: 1200px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 28px; }
.logo-text { font-size: 22px; font-weight: 700; color: #1a5fb4; letter-spacing: 2px; }
.nav { display: flex; gap: 30px; }
.nav a { font-weight: 500; color: #555; transition: color 0.3s; }
.nav a:hover { color: #1a5fb4; }
.header-phone { font-weight: 600; color: #1a5fb4; font-size: 16px; }

/* ========== Hero ========== */
.hero { background: linear-gradient(135deg, #1a5fb4 0%, #0d47a1 100%); color: white; padding: 100px 20px; text-align: center; }
.hero h1 { font-size: 56px; font-weight: 800; letter-spacing: 6px; margin-bottom: 15px; }
.hero-sub { font-size: 22px; opacity: 0.9; margin-bottom: 25px; letter-spacing: 3px; }
.hero-desc { font-size: 17px; max-width: 700px; margin: 0 auto 40px; opacity: 0.9; line-height: 1.8; }
.hero-btns { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }

/* ========== Buttons ========== */
.btn { display: inline-block; padding: 14px 36px; border-radius: 30px; font-size: 16px; font-weight: 600; cursor: pointer; transition: all 0.3s; border: none; }
.btn-primary { background: #ff6b35; color: white; }
.btn-primary:hover { background: #e55a28; transform: translateY(-2px); box-shadow: 0 5px 20px rgba(255,107,53,0.4); }
.btn-outline { background: transparent; color: white; border: 2px solid white; }
.btn-outline:hover { background: rgba(255,255,255,0.15); }
.btn-full { width: 100%; }

/* ========== Section ========== */
.section { padding: 80px 20px; }
.section-gray { background: #f8f9fa; }
.section-title { text-align: center; font-size: 34px; color: #0d47a1; margin-bottom: 50px; font-weight: 700; letter-spacing: 2px; }

/* ========== About ========== */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.about-card { background: white; border-radius: 16px; padding: 40px 30px; box-shadow: 0 5px 20px rgba(0,0,0,0.06); text-align: center; transition: transform 0.3s, box-shadow 0.3s; }
.about-card:hover { transform: translateY(-8px); box-shadow: 0 12px 35px rgba(0,0,0,0.12); }
.about-icon { font-size: 50px; margin-bottom: 20px; }
.about-card h3 { font-size: 22px; color: #0d47a1; margin-bottom: 15px; }
.about-card p { color: #666; font-size: 15px; line-height: 1.8; }

/* ========== Products ========== */
.products-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 30px; }
.product-card { background: white; border-radius: 16px; padding: 35px 28px; box-shadow: 0 5px 20px rgba(0,0,0,0.06); border: 1px solid #eee; transition: all 0.3s; position: relative; overflow: hidden; }
.product-card:hover { transform: translateY(-5px); box-shadow: 0 12px 35px rgba(0,0,0,0.1); border-color: #1a5fb4; }
.product-icon { font-size: 45px; margin-bottom: 18px; }
.product-card h3 { font-size: 20px; color: #0d47a1; margin-bottom: 12px; }
.product-card p { color: #666; font-size: 14px; line-height: 1.8; margin-bottom: 15px; }
.product-tag { display: inline-block; background: #e8f0fe; color: #1a5fb4; font-size: 12px; padding: 4px 12px; border-radius: 20px; font-weight: 600; }

/* ========== Services ========== */
.services-list { max-width: 800px; margin: 0 auto; }
.service-item { display: flex; gap: 25px; padding: 30px; background: white; border-radius: 14px; margin-bottom: 20px; box-shadow: 0 3px 15px rgba(0,0,0,0.05); align-items: flex-start; transition: box-shadow 0.3s; }
.service-item:hover { box-shadow: 0 8px 25px rgba(0,0,0,0.1); }
.service-num { font-size: 36px; font-weight: 800; color: #1a5fb4; opacity: 0.3; min-width: 60px; line-height: 1; }
.service-content h3 { font-size: 20px; color: #0d47a1; margin-bottom: 8px; }
.service-content p { color: #666; font-size: 15px; line-height: 1.7; }

/* ========== Contact ========== */
.contact-section { background: linear-gradient(135deg, #1a5fb4 0%, #0d47a1 100%); color: white; }
.contact-section .section-title { color: white; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.contact-info-card { display: flex; flex-direction: column; gap: 25px; }
.contact-item { display: flex; gap: 18px; align-items: flex-start; }
.contact-icon { font-size: 28px; min-width: 40px; }
.contact-label { font-size: 13px; opacity: 0.8; margin-bottom: 4px; }
.contact-value { font-size: 17px; font-weight: 600; }
.contact-form-card { background: white; border-radius: 16px; padding: 35px; color: #333; }
.contact-form-card h3 { font-size: 22px; color: #0d47a1; margin-bottom: 8px; }
.form-desc { color: #888; font-size: 14px; margin-bottom: 25px; }
.contact-form { display: flex; flex-direction: column; gap: 15px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 12px 16px; border: 1px solid #ddd; border-radius: 10px; font-size: 15px; font-family: inherit; outline: none; transition: border-color 0.3s; }
.contact-form input:focus, .contact-form textarea:focus { border-color: #1a5fb4; }
.contact-form textarea { resize: vertical; }

/* ========== Footer ========== */
.footer { background: #0a2b6b; color: rgba(255,255,255,0.8); }
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; padding: 50px 0 30px; border-bottom: 1px solid rgba(255,255,255,0.1); flex-wrap: wrap; gap: 30px; }
.footer-name { font-size: 22px; font-weight: 700; color: white; margin-bottom: 10px; }
.footer-desc { font-size: 14px; max-width: 300px; line-height: 1.7; opacity: 0.7; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links-title { font-size: 16px; font-weight: 600; color: white; margin-bottom: 5px; }
.footer-links a { font-size: 14px; opacity: 0.7; transition: opacity 0.3s; }
.footer-links a:hover { opacity: 1; }
.footer-bottom { padding: 20px 0; display: flex; justify-content: space-between; align-items: center; font-size: 13px; opacity: 0.6; flex-wrap: wrap; gap: 10px; }
.footer-bottom a { color: rgba(255,255,255,0.8); text-decoration: underline; }
.footer-bottom a:hover { color: white; }

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .header-inner { flex-direction: column; gap: 12px; }
  .nav { gap: 20px; }
  .hero h1 { font-size: 38px; letter-spacing: 3px; }
  .hero-sub { font-size: 18px; }
  .hero-desc { font-size: 15px; }
  .section { padding: 60px 15px; }
  .section-title { font-size: 26px; margin-bottom: 35px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; }
}