/* Trang công khai: giới thiệu, chính sách, điều khoản */
:root { --g: #15803d; --g-d: #166534; --ink: #0f172a; --mut: #64748b; --line: #e2e8f0; --bg: #f8fafc; --soft: #f0fdf4; }
* { box-sizing: border-box; }
body { margin: 0; font-family: 'Inter', -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: #fff; line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: var(--g); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.top { position: sticky; top: 0; z-index: 5; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; text-decoration: none; color: var(--ink); }
.logo img { width: 34px; height: 34px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 11px 20px; border-radius: 10px; font-weight: 600; text-decoration: none; border: 1px solid transparent; font-size: 15px; white-space: nowrap; }
.btn.pri { background: var(--g); color: #fff; } .btn.pri:hover { background: var(--g-d); }
.btn.ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.hero { padding: 64px 0 48px; background: linear-gradient(180deg, var(--soft), #fff); }
.hero h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.15; margin: 0 0 16px; letter-spacing: -.02em; }
.hero p.lead { font-size: clamp(16px, 2.2vw, 19px); color: var(--mut); max-width: 680px; margin: 0 0 26px; }
.hero .cta { display: flex; gap: 10px; flex-wrap: wrap; }
.hero .note { margin-top: 12px; font-size: 14px; color: var(--mut); }
section.blk { padding: 56px 0; }
section.blk.alt { background: var(--bg); }
h2 { font-size: clamp(24px, 3.4vw, 32px); margin: 0 0 8px; letter-spacing: -.01em; }
.sub { color: var(--mut); margin: 0 0 28px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.card h3 { margin: 6px 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--mut); font-size: 15px; }
.ic { width: 40px; height: 40px; border-radius: 10px; background: var(--soft); color: var(--g); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { position: relative; padding: 20px 20px 20px 64px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.step::before { counter-increment: s; content: counter(s); position: absolute; left: 18px; top: 18px; width: 32px; height: 32px; border-radius: 50%; background: var(--g); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.step b { display: block; margin-bottom: 4px; }
.step span { color: var(--mut); font-size: 15px; }
.price { max-width: 420px; margin: 0 auto; text-align: center; border: 2px solid var(--g); border-radius: 18px; padding: 28px 24px; background: #fff; }
.price .amt { font-size: 44px; font-weight: 800; letter-spacing: -.02em; }
.price .amt small { font-size: 16px; color: var(--mut); font-weight: 500; }
.price ul { text-align: left; padding-left: 20px; margin: 16px 0 22px; }
.faq details { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; background: #fff; margin-bottom: 10px; }
.faq summary { font-weight: 600; cursor: pointer; }
.faq p { margin: 8px 0 0; color: var(--mut); }
footer { border-top: 1px solid var(--line); padding: 26px 0; color: var(--mut); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
.doc { padding: 40px 0 60px; max-width: 760px; }
.doc h1 { font-size: clamp(26px, 4vw, 34px); margin: 0 0 6px; }
.doc h2 { font-size: 20px; margin: 28px 0 8px; }
.doc p, .doc li { color: #334155; }
.doc .upd { color: var(--mut); font-size: 14px; }
@media (max-width: 760px) {
  .grid3, .steps { grid-template-columns: 1fr; }
  .top .wrap { padding: 0 12px; gap: 8px; }
  .top .btn { padding: 7px 10px; font-size: 13px; }
  .logo { font-size: 15px; gap: 6px; }
  .logo img { width: 28px; height: 28px; }
  .hero h1 br { display: none; }
  .hero { padding: 40px 0 32px; }
  section.blk { padding: 40px 0; }
}