/* ============================================
   瑞盛印刷官网样式
   ============================================ */

:root {
  --primary: #1a365d;
  --primary-light: #2b4c7e;
  --accent: #e63946;
  --gray-bg: #f5f7fa;
  --text: #2d3748;
  --text-light: #718096;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 4px 16px rgba(26, 54, 93, 0.08);
  --shadow-lg: 0 10px 32px rgba(26, 54, 93, 0.15);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--white);
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #edf2f7;
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 18px; letter-spacing: 1px;
}
.logo-text { font-size: 20px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.logo-text small { display: block; font-size: 10px; font-weight: 400; color: var(--text-light); letter-spacing: 2px; }

.main-nav { display: flex; gap: 8px; }
.main-nav a {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: all 0.25s;
}
.main-nav a:hover { background: var(--gray-bg); color: var(--primary); }
.main-nav a.active { background: var(--primary); color: #fff; }

.nav-toggle { display: none; background: none; border: none; font-size: 26px; cursor: pointer; color: var(--primary); }

/* ============ Hero ============ */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0f2137 0%, #1a365d 55%, #2b4c7e 100%);
  color: #fff;
  padding: 120px 0 140px;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -120px; top: -120px;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(230,57,70,0.25), transparent 70%);
}
.hero::before {
  content: "";
  position: absolute;
  left: -80px; bottom: -160px;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.08), transparent 70%);
}
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 24px;
}
.hero h1 { font-size: 56px; line-height: 1.2; font-weight: 800; margin-bottom: 20px; letter-spacing: 1px; }
.hero p { font-size: 18px; color: rgba(255,255,255,0.85); margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============ 按钮 ============ */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(230,57,70,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(230,57,70,0.45); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.7); }
.btn-outline:hover { background: rgba(255,255,255,0.12); }
.btn-lg { padding: 16px 48px; font-size: 18px; }
.btn-block { width: 100%; }

/* ============ 通用区块 ============ */
.section { padding: 90px 0; }
.section-gray { background: var(--gray-bg); }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 { font-size: 36px; color: var(--primary); margin-bottom: 12px; font-weight: 800; }
.section-head p { color: var(--text-light); font-size: 17px; }

.grid { display: grid; gap: 28px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 26px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  text-align: center;
  display: block;
  border: 1px solid #edf2f7;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card-icon { font-size: 42px; margin-bottom: 16px; }
.card h3 { font-size: 20px; color: var(--primary); margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: 15px; }

/* 产品卡片 */
.product-card { text-align: center; }
.product-thumb {
  height: 150px;
  border-radius: 8px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
  color: #fff;
}

/* ============ 数据统计 ============ */
.stats { background: var(--primary); color: #fff; padding: 56px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item strong { display: block; font-size: 42px; font-weight: 800; }
.stat-item span { font-size: 15px; opacity: 0.85; }

/* ============ CTA ============ */
.cta-section { padding: 60px 0; }
.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  text-align: center;
  padding: 64px 40px;
  border-radius: 16px;
}
.cta-box h2 { font-size: 32px; margin-bottom: 12px; }
.cta-box p { margin-bottom: 28px; opacity: 0.9; }

/* ============ 页脚 ============ */
.site-footer { background: #0f2137; color: rgba(255,255,255,0.75); padding-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
.site-footer h4 { color: #fff; margin-bottom: 16px; font-size: 17px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 10px; font-size: 15px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 18px 0; font-size: 14px; text-align: center; }

/* ============ 页面横幅（内页） ============ */
.page-banner {
  background: linear-gradient(135deg, #0f2137, #1a365d);
  color: #fff;
  padding: 72px 0;
  text-align: center;
}
.page-banner h1 { font-size: 42px; font-weight: 800; margin-bottom: 8px; }
.page-banner p { opacity: 0.85; font-size: 17px; }

/* ============ 产品详情 ============ */
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.product-detail {
  background: #fff;
  border: 1px solid #edf2f7;
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  gap: 22px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}
.product-detail:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.pd-icon {
  width: 76px; height: 76px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 38px;
  flex-shrink: 0;
}
.pd-body h3 { color: var(--primary); font-size: 22px; margin-bottom: 8px; }
.pd-body p { color: var(--text-light); font-size: 15px; margin-bottom: 12px; }
.pd-body ul { list-style: none; font-size: 14px; color: var(--text); }
.pd-body li { margin-bottom: 6px; }
.pd-body li::before { content: "✓ "; color: var(--accent); font-weight: 700; }

/* ============ 关于我们 ============ */
.about-intro { display: grid; grid-template-columns: 1.6fr 1fr; gap: 48px; align-items: start; }
.about-text h2 { color: var(--primary); font-size: 32px; margin-bottom: 20px; }
.about-text p { margin-bottom: 16px; color: var(--text); font-size: 16px; }
.about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.fact-card {
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
}
.fact-card strong { display: block; font-size: 32px; font-weight: 800; }
.fact-card span { font-size: 14px; opacity: 0.85; }

/* 生产流程 */
.process-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.process-step {
  background: #fff;
  border-radius: var(--radius);
  padding: 26px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--primary);
}
.step-num {
  display: inline-block;
  font-size: 14px;
  font-weight: 800;
  color: var(--accent);
  background: rgba(230,57,70,0.1);
  padding: 3px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.process-step h4 { color: var(--primary); margin-bottom: 8px; font-size: 17px; }
.process-step p { font-size: 13px; color: var(--text-light); }

/* ============ 联系我们 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; }
.contact-info h2 { color: var(--primary); font-size: 28px; margin-bottom: 24px; }
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  padding: 20px;
  background: var(--gray-bg);
  border-radius: var(--radius);
}
.ci-icon { font-size: 30px; }
.contact-item strong { display: block; margin-bottom: 4px; color: var(--primary); }
.contact-item p { color: var(--text-light); font-size: 15px; }
.contact-tip {
  background: rgba(230,57,70,0.08);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  color: var(--text);
}

.contact-form-wrap { background: #fff; border: 1px solid #edf2f7; border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); }
.contact-form-wrap h2 { color: var(--primary); font-size: 28px; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 600; color: var(--text); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.25s;
  background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,54,93,0.1);
}
.form-note { margin-top: 14px; font-size: 14px; color: #38a169; text-align: center; }

/* ============ 响应式 ============ */
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .product-detail-grid { grid-template-columns: 1fr; }
  .process-flow { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero { padding: 80px 0 100px; }
  .hero h1 { font-size: 38px; }
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 24px;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid #edf2f7;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .grid-3, .grid-4, .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .process-flow { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 30px; }
}