:root {
  --primary: #e63946;
  --primary-dark: #b32734;
  --primary-light: #ffe9eb;
  --accent: #1d3557;
  --text: #22272e;
  --text-light: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --border: #e5e7eb;
  --shadow: 0 6px 20px rgba(20, 24, 33, 0.08);
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-title { font-size: 2rem; color: var(--text); margin-bottom: 14px; position: relative; }
.section-title::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
  margin: 14px auto 0;
}
.section-subtitle { color: var(--text-light); font-size: 1rem; }
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; align-items: center; gap: 16px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(20, 24, 33, 0.14); }
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 18px;
}
.card-title { font-size: 1.15rem; margin-bottom: 10px; color: var(--text); }
.card-text { color: var(--text-light); font-size: 0.95rem; }
.card-body { margin-top: 6px; }
.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 0.98rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-outline { border-color: var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 9px 20px; font-size: 0.88rem; }
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s ease;
}
.nav.scrolled { box-shadow: 0 4px 18px rgba(20, 24, 33, 0.1); }
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-list { display: flex; align-items: center; gap: 30px; }
.nav-link { font-size: 0.96rem; color: var(--text); position: relative; padding: 6px 0; transition: color .25s; }
.nav-link:hover { color: var(--primary); }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width .25s;
}
.nav-link:hover::after { width: 100%; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; }
.nav-cta { margin-left: 8px; }
.hero {
  padding: 150px 0 80px;
  background: linear-gradient(135deg, #fff5f6 0%, #f6f7f9 60%, #eef1f6 100%);
}
.hero-inner { max-width: 1200px; margin: 0 auto; padding: 0 20px; text-align: center; }
.hero-title { font-size: 2.8rem; color: var(--text); margin-bottom: 20px; }
.hero-title span { color: var(--primary); }
.hero-subtitle { font-size: 1.1rem; color: var(--text-light); max-width: 720px; margin: 0 auto 34px; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 54px; }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 900px; margin: 0 auto; }
.hero-stat { background: #fff; border-radius: var(--radius); padding: 24px 12px; box-shadow: var(--shadow); }
.hero-stat-num { font-size: 1.9rem; font-weight: 800; color: var(--primary); }
.hero-stat-label { font-size: 0.88rem; color: var(--text-light); margin-top: 6px; }
.timeline { position: relative; padding-left: 28px; border-left: 2px solid var(--border); }
.timeline-item { position: relative; padding-bottom: 34px; }
.timeline-dot {
  position: absolute;
  left: -38px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--primary-light);
}
.timeline-content { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; }
.timeline-date { font-size: 0.82rem; color: var(--primary); font-weight: 600; }
.timeline-title { font-size: 1.05rem; margin: 6px 0; }
.timeline-text { font-size: 0.92rem; color: var(--text-light); }
.news-list { display: grid; gap: 22px; }
.news-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); transition: transform .3s, box-shadow .3s; }
.news-item:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(20, 24, 33, 0.14); }
.news-title { font-size: 1.15rem; margin-bottom: 8px; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.news-date { font-size: 0.82rem; color: var(--text-light); }
.news-category { font-size: 0.76rem; background: var(--primary-light); color: var(--primary-dark); padding: 3px 10px; border-radius: 999px; }
.news-summary { font-size: 0.94rem; color: var(--text-light); }
.news-body { font-size: 0.94rem; color: var(--text-light); margin-top: 10px; }
.news-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag { font-size: 0.76rem; color: var(--text-light); border: 1px solid var(--border); padding: 3px 10px; border-radius: 999px; }
.faq-list { display: grid; gap: 16px; max-width: 860px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 26px; box-shadow: var(--shadow); }
.faq-question { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.faq-answer { font-size: 0.94rem; color: var(--text-light); }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.92rem; font-weight: 600; margin-bottom: 8px; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  transition: border-color .25s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--primary); }
.form-textarea { min-height: 120px; resize: vertical; }
.form-submit { width: 100%; border: none; }
.form-tip { font-size: 0.82rem; color: var(--text-light); margin-top: 10px; }
.stat-item { text-align: center; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 0.88rem; color: var(--text-light); margin-top: 6px; }
.progress { height: 10px; background: var(--border); border-radius: 999px; overflow: hidden; margin-top: 8px; }
.progress-fill { height: 100%; background: var(--primary); border-radius: 999px; }
.bar-chart { display: flex; align-items: flex-end; gap: 18px; height: 220px; padding: 20px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.bar-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; }
.bar-fill { width: 100%; background: linear-gradient(180deg, var(--primary), var(--primary-dark)); border-radius: 8px 8px 0 0; }
.bar-label { font-size: 0.8rem; color: var(--text-light); margin-top: 8px; }
.badge { display: inline-block; font-size: 0.76rem; padding: 3px 10px; border-radius: 999px; background: var(--primary-light); color: var(--primary-dark); }
.customer-card, .case-card, .honor-card, .partner-logo, .review-card, .benefit-card, .region-card, .support-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s;
}
.customer-card:hover, .case-card:hover, .honor-card:hover, .partner-logo:hover,
.review-card:hover, .benefit-card:hover, .region-card:hover, .support-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(20, 24, 33, 0.14);
}
.step-list { display: grid; gap: 22px; }
.step-item { display: flex; gap: 18px; align-items: flex-start; }
.step-number {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.footer { background: #171b21; color: #c3c8d0; padding: 60px 0 0; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 20px 40px; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr; gap: 32px; }
.footer-col { font-size: 0.9rem; }
.footer-title { font-size: 1rem; color: #fff; margin-bottom: 18px; }
.footer-link { display: block; color: #c3c8d0; margin-bottom: 10px; transition: color .25s; }
.footer-link:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid #2a2f37; padding: 22px 20px; text-align: center; font-size: 0.84rem; color: #9aa1ab; }
.footer-info { font-size: 0.88rem; line-height: 1.9; color: #c3c8d0; }
@media (max-width: 1200px) {
  .hero-title { font-size: 2.4rem; }
}
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-list {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    border-bottom: 1px solid var(--border);
  }
  .nav-list.open { max-height: 400px; padding: 12px 20px 20px; }
  .nav-list li { width: 100%; }
  .nav-link { display: block; width: 100%; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .section { padding: 60px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero { padding: 120px 0 60px; }
  .hero-title { font-size: 2rem; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.7rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-stats { grid-template-columns: 1fr; }
  .section-title { font-size: 1.6rem; }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
}