:root {
  --brand: #14b8a6;
  --brand-dark: #0f766e;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --surface: #f8fafc;
  --card: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #f4fbfa 0%, #ffffff 42%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { width: min(1120px, calc(100% - 28px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.92); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; }
.brand-mark { width: 34px; height: 34px; border-radius: 8px; background: var(--brand); color: white; display: grid; place-items: center; }
.nav { display: flex; gap: 4px; align-items: center; overflow-x: auto; }
.nav a { padding: 10px 12px; border-radius: 8px; color: #334155; font-size: 14px; white-space: nowrap; }
.nav a.is-active, .nav a:hover { background: #ccfbf1; color: var(--brand-dark); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 16px; border-radius: 8px; background: var(--brand); color: white; border: 1px solid var(--brand); font-weight: 700; cursor: pointer; }
.btn.secondary { background: white; color: var(--brand-dark); border-color: #99f6e4; }
.btn.dark { background: var(--ink); border-color: var(--ink); }

.main { padding: 22px 0 84px; }
.hero { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; align-items: center; padding: 30px; border: 1px solid #ccfbf1; border-radius: 8px; background: linear-gradient(135deg, #ecfeff, #fff); }
.eyebrow { margin: 0 0 8px; color: var(--brand-dark); font-size: 12px; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; }
.hero h1 { margin: 0; font-size: clamp(30px, 5vw, 54px); line-height: 1.08; letter-spacing: 0; }
.hero p { color: #475569; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 24px; }
.stat { padding: 14px; border-radius: 8px; background: white; border: 1px solid var(--line); }
.stat strong { display: block; font-size: 22px; }
.hero-art { min-height: 260px; display: grid; place-items: center; }
.hero-art img { width: min(360px, 100%); }

.quick-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 10px; margin-top: 18px; }
.quick-item { min-height: 86px; padding: 12px 8px; border-radius: 8px; background: white; border: 1px solid var(--line); text-align: center; color: #334155; }
.quick-item img { width: 28px; height: 28px; margin: 0 auto 8px; }

.section { margin-top: 36px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 14px; }
.section h2 { margin: 0; font-size: 24px; }
.section-desc { margin: 6px 0 0; color: var(--muted); line-height: 1.7; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.two-col { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; box-shadow: 0 16px 40px rgba(15,23,42,.04); }
.card:hover { border-color: #5eead4; transform: translateY(-1px); transition: .18s ease; }
.card-cover { height: 128px; border-radius: 8px; background: #f1f5f9; display: grid; place-items: center; margin-bottom: 12px; overflow: hidden; }
.card-cover img { max-height: 115px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.meta { color: var(--muted); font-size: 13px; line-height: 1.7; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.tag { padding: 5px 8px; border-radius: 8px; background: #f1f5f9; color: #475569; font-size: 12px; }
.tag.teal { background: #ccfbf1; color: var(--brand-dark); }
.article-card { display: grid; grid-template-columns: 112px 1fr; gap: 14px; align-items: center; }
.article-card .card-cover { height: 92px; margin: 0; }
.steps { display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px; }
.step { padding: 14px 10px; border-radius: 8px; border: 1px solid #99f6e4; background: #f0fdfa; text-align: center; font-weight: 800; color: var(--brand-dark); }
.cta { display: grid; grid-template-columns: 1fr auto; gap: 18px; align-items: center; background: var(--ink); color: white; }
.cta p { color: #cbd5e1; }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.field { display: grid; gap: 6px; }
.field label { color: #475569; font-size: 13px; font-weight: 700; }
.field input, .field textarea, .search-input {
  width: 100%; border: 1px solid var(--line); border-radius: 8px; min-height: 42px; padding: 10px 12px; font: inherit; outline: none;
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:focus, .field textarea:focus, .search-input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px #ccfbf1; }

.footer { margin-top: 40px; padding: 28px 0; border-top: 1px solid var(--line); color: #64748b; background: #fff; }
.bottom-tabs { display: none; }
.admin-shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; background: #f8fafc; }
.admin-side { padding: 20px; background: #0f172a; color: white; }
.admin-side a { display: block; padding: 10px; border-radius: 8px; color: #cbd5e1; }
.admin-side a.is-active, .admin-side a:hover { background: #1e293b; color: white; }
.admin-main { padding: 22px; overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; background: white; border-radius: 8px; overflow: hidden; }
.table th, .table td { padding: 13px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; }
.notice { padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.warning { background: #fff7ed; color: #c2410c; border-color: #fed7aa; }

@media (max-width: 860px) {
  .header-inner { align-items: start; flex-direction: column; padding: 12px 0; }
  .hero, .two-col, .cta, .admin-shell { grid-template-columns: 1fr; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .quick-grid { grid-template-columns: repeat(4, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .bottom-tabs { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; display: grid; grid-template-columns: repeat(5, 1fr); background: white; border-top: 1px solid var(--line); padding: 7px 4px; }
  .bottom-tabs a { text-align: center; font-size: 12px; color: #475569; }
  .bottom-tabs img { width: 20px; height: 20px; margin: 0 auto 4px; }
}