/* ===== Design System ===== */
:root {
  --color-primary: #2d6a4f;
  --color-primary-light: #40916c;
  --color-primary-dark: #1b4332;
  --color-accent: #ee9b00;
  --color-accent-light: #f7c35c;
  --color-danger: #9b2226;
  --color-danger-light: #f4a261;
  --color-bg: #fafaf9;
  --color-surface: #ffffff;
  --color-text: #1c1c1c;
  --color-text-secondary: #57534e;
  --color-text-muted: #a8a29e;
  --color-border: #e7e5e4;
  --color-border-light: #f5f5f4;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-width: 1100px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
}

/* ===== Typography ===== */
h1 { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.25; }
h2 { font-size: 1.65rem; font-weight: 700; line-height: 1.35; margin: 2.5rem 0 1rem; }
h3 { font-size: 1.25rem; font-weight: 700; margin: 1.8rem 0 0.6rem; }
h4 { font-size: 1.05rem; font-weight: 700; margin: 1.2rem 0 0.4rem; }
p { margin-bottom: 1rem; color: var(--color-text-secondary); }
a { color: var(--color-primary); text-decoration: none; transition: color .15s; }
a:hover { color: var(--color-primary-light); }

strong { color: var(--color-text); }

/* ===== Layout ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* ===== Header ===== */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,0.92);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.site-logo {
  font-size: 1.15rem; font-weight: 800; color: var(--color-primary-dark);
  display: flex; align-items: center; gap: 8px;
}
.site-logo:hover { color: var(--color-primary); }
.site-logo .logo-icon { font-size: 1.5rem; }

/* ===== Navigation ===== */
.nav-links { display: flex; gap: 1.5rem; list-style: none; }
.nav-links a {
  font-size: 0.88rem; font-weight: 600; color: var(--color-text-secondary);
  padding: 6px 0; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
  background: var(--color-primary); transition: width .2s;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a:hover, .nav-links a.active { color: var(--color-primary); }

.mobile-menu-btn { display: none; background: none; border: none; font-size: 1.3rem; cursor: pointer; padding: 4px; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: #fff; padding: 5rem 0 4rem; text-align: center;
}
.hero h1 { font-size: 2.6rem; color: #fff; margin-bottom: 0.8rem; }
.hero p { color: rgba(255,255,255,0.85); font-size: 1.15rem; max-width: 640px; margin: 0 auto 2rem; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 24px; border-radius: var(--radius-sm); font-weight: 700;
  font-size: 0.92rem; transition: all .2s; cursor: pointer; border: none;
}
.btn-primary { background: var(--color-accent); color: #1c1c1c; }
.btn-primary:hover { background: var(--color-accent-light); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

/* ===== Stats Bar ===== */
.stats-bar {
  background: var(--color-surface); border-bottom: 1px solid var(--color-border);
  padding: 1.4rem 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.stat-item .stat-number { font-size: 1.5rem; font-weight: 800; color: var(--color-primary); }
.stat-item .stat-label { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 2px; }

/* ===== Section ===== */
.section { padding: 3.5rem 0; }
.section-title { font-size: 1.7rem; font-weight: 800; margin-bottom: 0.5rem; }
.section-subtitle { color: var(--color-text-muted); margin-bottom: 2rem; font-size: 1rem; }

/* ===== Cards ===== */
.card-grid { display: grid; gap: 1.5rem; }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 1.6rem; transition: all .25s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--color-primary-light); }
.card-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.card h3 { margin-top: 0; font-size: 1.1rem; }
.card p { font-size: 0.9rem; color: var(--color-text-secondary); margin-bottom: 0; }
.card-tag {
  display: inline-block; font-size: 0.72rem; font-weight: 700; padding: 3px 10px;
  border-radius: 100px; margin-bottom: 0.6rem;
}
.tag-law { background: #ecfdf5; color: var(--color-primary); }
.tag-hospital { background: #eff6ff; color: #2563eb; }
.tag-breed { background: #fef3c7; color: #d97706; }
.tag-health { background: #fef2f2; color: #dc2626; }
.tag-care { background: #f0fdf4; color: #16a34a; }
.tag-cost { background: #fdf4ff; color: #9333ea; }

/* ===== Article ===== */
.article-header {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}
.article-header h1 { font-size: 2rem; }
.article-meta {
  display: flex; gap: 1rem; align-items: center; margin-top: 0.8rem;
  color: var(--color-text-muted); font-size: 0.85rem;
}
.article-meta .tag { font-weight: 700; }

.article-body {
  font-size: 1.02rem; line-height: 1.85; max-width: 780px; margin: 0 auto;
}
.article-body h2 { color: var(--color-primary-dark); border-left: 4px solid var(--color-primary); padding-left: 14px; }
.article-body h3 { color: var(--color-text); }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; }
table {
  width: 100%; border-collapse: collapse; font-size: 0.9rem;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm); overflow: hidden;
}
thead { background: var(--color-primary); color: #fff; }
thead th { padding: 10px 14px; font-weight: 700; text-align: left; font-size: 0.85rem; }
tbody td { padding: 10px 14px; border-bottom: 1px solid var(--color-border-light); color: var(--color-text-secondary); }
tbody tr:hover { background: var(--color-border-light); }
tbody tr:last-child td { border-bottom: none; }

/* Callout */
.callout {
  border-left: 4px solid; padding: 1rem 1.2rem; margin: 1.5rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 0.92rem;
}
.callout-info { background: #eff6ff; border-color: #3b82f6; color: #1e40af; }
.callout-warning { background: #fefce8; border-color: var(--color-accent); color: #92400e; }
.callout-danger { background: #fef2f2; border-color: var(--color-danger); color: #991b1b; }
.callout-success { background: #f0fdf4; border-color: #16a34a; color: #166534; }
.callout strong { color: inherit; }

/* Checklist */
.checklist { list-style: none; padding: 0; }
.checklist li { padding: 4px 0 4px 28px; position: relative; color: var(--color-text-secondary); margin-bottom: 4px; }
.checklist li::before { content: '✓'; position: absolute; left: 0; color: var(--color-primary); font-weight: 800; }

/* Steps */
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; padding: 14px 0 14px 44px; position: relative; border-bottom: 1px solid var(--color-border-light); }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: 12px;
  width: 30px; height: 30px; background: var(--color-primary); color: #fff;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 0.82rem; font-weight: 800;
}

/* ===== Hospital Map ===== */
.map-container { height: 500px; border-radius: var(--radius-md); border: 1px solid var(--color-border); margin: 1.5rem 0; overflow: hidden; }
#hospital-map { width: 100%; height: 100%; }

.hospital-table-wrap { margin: 2rem 0; }
.hospital-table-wrap input { width: 100%; padding: 10px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.9rem; margin-bottom: 1rem; font-family: var(--font-sans); }
.hospital-table-wrap input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(45,106,79,0.1); }

/* ===== Decision Tree ===== */
.decision-tree { max-width: 640px; margin: 2rem auto; }
.dt-question {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 1.5rem; margin-bottom: 1rem;
}
.dt-question h3 { margin-top: 0; font-size: 1.1rem; }
.dt-options { display: flex; gap: 0.8rem; margin-top: 0.8rem; flex-wrap: wrap; }
.dt-option {
  padding: 8px 18px; border: 2px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-surface); cursor: pointer; font-weight: 600; font-size: 0.9rem;
  transition: all .15s; font-family: var(--font-sans);
}
.dt-option:hover { border-color: var(--color-primary); background: #ecfdf5; }
.dt-option.selected { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.dt-result {
  background: linear-gradient(135deg, #ecfdf5, #f0fdf4);
  border: 1px solid var(--color-primary-light); border-radius: var(--radius-md);
  padding: 1.8rem; margin-top: 1.5rem; display: none;
}
.dt-result.show { display: block; }
.dt-result h3 { color: var(--color-primary-dark); margin-top: 0; }
.dt-restart { margin-top: 1rem; font-size: 0.85rem; color: var(--color-text-muted); cursor: pointer; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary-dark); color: rgba(255,255,255,0.7);
  padding: 2.5rem 0; margin-top: 4rem; font-size: 0.88rem;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
.footer-grid h4 { color: #fff; font-size: 0.9rem; margin-bottom: 0.6rem; }
.footer-grid a { color: rgba(255,255,255,0.6); font-size: 0.84rem; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 2rem; padding-top: 1.5rem; text-align: center; font-size: 0.8rem; }

.disclaimer-box {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 1.2rem 1.5rem;
  margin: 2rem 0; font-size: 0.85rem; color: var(--color-text-muted);
  display: flex; gap: 10px; align-items: flex-start;
}
.disclaimer-box .icon { font-size: 1.2rem; flex-shrink: 0; }

/* ===== Breadcrumb ===== */
.breadcrumb { padding: 1rem 0; font-size: 0.84rem; color: var(--color-text-muted); }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb span { color: var(--color-text); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  h1 { font-size: 1.65rem; }
  .hero h1 { font-size: 1.9rem; }
  .hero { padding: 3rem 0 2.5rem; }
  .card-grid-2, .card-grid-3, .card-grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--color-surface); border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem; gap: 0.8rem; box-shadow: var(--shadow-md);
  }
  .mobile-menu-btn { display: block; }
}