:root {
  --primary: #07c160;
  --primary-dark: #06ad56;
  --primary-light: #e6f8ef;
  --secondary: #2c3e50;
  --text: #333333;
  --text-light: #666666;
  --text-muted: #888888;
  --bg: #ffffff;
  --bg-soft: #f7f9fa;
  --border: #e8eced;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --max-width: 1200px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  line-height: 1.75;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo-link { display: flex; align-items: center; }
.logo-link img { height: 40px; width: auto; display: block; }

.nav-list {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.nav-list a:hover, .nav-list a.active {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
  text-decoration: none;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--secondary);
  padding: 4px;
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  .nav-list {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 16px;
  }
  .nav-list.open { display: flex; }
  .nav-list a { display: block; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-list a:last-child { border-bottom: none; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-outline {
  background: #fff;
  color: var(--primary-dark);
  border: 1px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-light); text-decoration: none; }
.btn svg { flex-shrink: 0; }

/* Hero */
.hero {
  background: linear-gradient(135deg, #f0fdf5 0%, #ffffff 100%);
  padding: 80px 0 60px;
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero-title {
  font-size: 40px;
  line-height: 1.25;
  margin: 0 0 20px;
  color: var(--secondary);
}
.hero-title .accent { color: var(--primary-dark); }
.hero-subtitle {
  font-size: 18px;
  color: var(--text-light);
  margin: 0 0 28px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.hero-card h2 { margin: 0 0 16px; font-size: 20px; }
.hero-card ul { list-style: none; margin: 0; padding: 0; }
.hero-card li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-light);
}
.hero-card li:last-child { border-bottom: none; }
.hero-card svg { color: var(--primary); flex-shrink: 0; margin-top: 2px; }

@media (max-width: 768px) {
  .hero { padding: 48px 0 40px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-title { font-size: 30px; }
  .hero-subtitle { font-size: 16px; }
}

/* Service cards */
.section { padding: 64px 0; }
.section-soft { background: var(--bg-soft); }
.section-title {
  text-align: center;
  font-size: 30px;
  margin: 0 0 12px;
  color: var(--secondary);
}
.section-desc {
  text-align: center;
  color: var(--text-light);
  max-width: 720px;
  margin: 0 auto 40px;
  font-size: 16px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.service-card h3 { margin: 0 0 10px; font-size: 19px; color: var(--secondary); }
.service-card p { margin: 0 0 18px; color: var(--text-light); font-size: 14px; line-height: 1.7; }
.service-card .link { font-weight: 600; color: var(--primary-dark); display: inline-flex; align-items: center; gap: 4px; }
.service-card .link svg { width: 16px; height: 16px; }

@media (max-width: 1024px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .service-grid { grid-template-columns: 1fr; }
}

/* Features / trust */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-item {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border);
}
.feature-item .icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.feature-item h4 { margin: 0 0 8px; font-size: 17px; }
.feature-item p { margin: 0; font-size: 14px; color: var(--text-light); line-height: 1.7; }

@media (max-width: 768px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* Process */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.process-step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}
.process-step .num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 12px;
}
.process-step h4 { margin: 0 0 8px; font-size: 17px; }
.process-step p { margin: 0; font-size: 14px; color: var(--text-light); }

@media (max-width: 900px) {
  .process-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .process-steps { grid-template-columns: 1fr; }
}

/* Content pages */
.page-hero {
  background: var(--bg-soft);
  padding: 52px 0 44px;
}
.page-hero h1 { margin: 0 0 14px; font-size: 32px; color: var(--secondary); }
.page-hero p { margin: 0; color: var(--text-light); font-size: 17px; max-width: 780px; }

.content-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 40px 0 64px;
}
.main-content { min-width: 0; }
.main-content h2 {
  font-size: 24px;
  color: var(--secondary);
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}
.main-content h3 { font-size: 19px; color: var(--secondary); margin: 28px 0 12px; }
.main-content p { margin: 0 0 16px; color: var(--text); }
.main-content ul, .main-content ol { margin: 0 0 16px; padding-left: 22px; }
.main-content li { margin-bottom: 8px; }
.main-content a { color: var(--primary-dark); font-weight: 500; }

.tldr {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 22px;
  margin-bottom: 28px;
}
.tldr-title { font-weight: 700; color: var(--primary-dark); margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.tldr ul { margin: 0; padding-left: 18px; }
.tldr li { margin-bottom: 6px; }

.direct-answer {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}
.direct-answer-label {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}
.direct-answer p { margin: 0; font-size: 16px; line-height: 1.8; }

.sidebar {}
.sidebar-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-bottom: 20px;
  position: sticky;
  top: 84px;
}
.sidebar-card h4 { margin: 0 0 14px; font-size: 17px; }
.sidebar-card .contact-line { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; color: var(--text-light); font-size: 14px; }
.sidebar-card .contact-line svg { color: var(--primary); flex-shrink: 0; }
.sidebar-card .btn { width: 100%; justify-content: center; margin-top: 6px; }

.table-wrap { overflow-x: auto; margin-bottom: 20px; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: #fff;
  border: 1px solid var(--border);
}
th, td { padding: 12px 14px; border: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: var(--bg-soft); font-weight: 600; color: var(--secondary); }
tr:nth-child(even) td { background: #fafafa; }

.faq-item { margin-bottom: 18px; }
.faq-q { font-weight: 700; color: var(--secondary); margin-bottom: 8px; }
.faq-a { color: var(--text-light); line-height: 1.8; }

.highlight-box {
  background: #fff8e6;
  border: 1px solid #ffe5a8;
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin: 20px 0;
}
.highlight-box p { margin: 0; }

@media (max-width: 900px) {
  .content-layout { grid-template-columns: 1fr; }
  .sidebar-card { position: static; }
}

/* Footer */
.site-footer {
  background: var(--secondary);
  color: #cbd5e1;
  padding: 48px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-brand { color: #fff; font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.footer-desc { line-height: 1.7; margin: 0; }
.footer-col h5 { color: #fff; margin: 0 0 14px; font-size: 15px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: #cbd5e1; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a { color: #cbd5e1; }

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.contact-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 26px;
  text-align: center;
}
.contact-card .icon { color: var(--primary); margin-bottom: 12px; }
.contact-card h3 { margin: 0 0 8px; font-size: 18px; }
.contact-card p { margin: 0; color: var(--text-light); font-size: 15px; }

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* 404 */
.page-404 {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}
.page-404 h1 { font-size: 80px; margin: 0 0 10px; color: var(--primary); }
.page-404 p { font-size: 18px; color: var(--text-light); margin-bottom: 24px; }

/* Notice */
.notice {
  background: #fff3cd;
  border-left: 4px solid #e0a800;
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 20px;
  font-size: 14px;
  color: #664d03;
}
.notice p { margin: 0; }