/*
  =====================================================================
  STYLE CHÍNH CỦA WEBSITE
  - Muốn đổi màu thương hiệu: chỉ cần sửa các biến trong :root ngay dưới đây.
  - Không dùng font tải từ internet (Google Fonts...) để web chạy được cả khi mạng
    chặn. Muốn dùng font riêng thì xem ghi chú TODO-DEPLOY trong file site/_headers.
  =====================================================================
*/
 
:root {
  /* TODO-NOIDUNG: Màu thương hiệu. Lấy mã màu từ logo công ty (vd #0b5ed7). */
  --color-primary: #0f3d7a;      /* màu chính: header, tiêu đề, footer */
  --color-primary-light: #1d5fb8;
  --color-accent: #f28c28;       /* màu nhấn: nút bấm, điểm nổi bật */
  --color-accent-dark: #d97414;
 
  --color-text: #1f2a37;
  --color-muted: #5b6b7f;
  --color-bg: #ffffff;
  --color-bg-soft: #f4f7fb;
  --color-border: #e3e9f1;
 
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 61, 122, 0.08);
  --container: 1160px;
  --header-h: 72px;
 
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}
 
/* ---------- Reset cơ bản ---------- */
*,
*::before,
*::after { box-sizing: border-box; }
 
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
 
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
 
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .6em; color: var(--color-primary); }
h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }
 
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.section { padding: 88px 0; }
.bg-soft { background: var(--color-bg-soft); }
.muted { color: var(--color-muted); }
.eyebrow {
  display: inline-block;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: .6em;
}
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
 
/* ---------- Nút bấm ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
  border: 2px solid transparent;
  transition: background .2s, color .2s, transform .2s, box-shadow .2s;
  cursor: pointer;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--color-accent); color: #fff; box-shadow: 0 8px 20px rgba(242, 140, 40, .35); }
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-outline { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-sm { padding: 9px 18px; font-size: .9rem; }
 
/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(0, 0, 0, .06); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand img { height: 40px; width: auto; }
 
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { color: var(--color-text); font-weight: 600; }
.main-nav a:hover { color: var(--color-accent-dark); text-decoration: none; }
.main-nav a.nav-hotline { color: #fff; }
 
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 10px;
}
.nav-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--color-primary); transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
 
/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 88px;
  background:
    radial-gradient(circle at 85% 20%, rgba(242, 140, 40, .12), transparent 45%),
    linear-gradient(180deg, #eef4fc 0%, #fff 100%);
}
.hero-inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.hero .highlight { color: var(--color-accent); }
.lead { font-size: 1.15rem; color: var(--color-muted); max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero-media img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
 
/* ---------- Card & grid ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
}
.value-card p { color: var(--color-muted); margin: 0; }
.icon-circle {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 800;
  margin-bottom: 18px;
}
 
/* ---------- Pain points ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.checklist li {
  position: relative;
  background: #fff;
  border-radius: 12px;
  padding: 18px 20px 18px 56px;
  border: 1px solid var(--color-border);
  font-weight: 600;
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: .85rem;
}
 
/* ---------- Stats ---------- */
.stats { background: var(--color-primary); color: #fff; padding: 56px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat strong { display: block; font-size: clamp(2rem, 4vw, 2.8rem); color: var(--color-accent); line-height: 1.1; }
.stat span { opacity: .9; }
 
/* ---------- Features ---------- */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; margin-bottom: 64px; }
.feature:last-child { margin-bottom: 0; }
.feature img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; }
.feature-reverse img { order: 2; }
.feature p { color: var(--color-muted); font-size: 1.05rem; }
 
/* ---------- Process timeline ---------- */
.timeline { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--color-border);
}
.timeline li { position: relative; text-align: center; }
.timeline .step {
  position: relative;
  z-index: 1;
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  box-shadow: 0 0 0 6px var(--color-bg-soft);
}
.timeline h3 { font-size: 1.05rem; }
.timeline p { color: var(--color-muted); font-size: .95rem; margin: 0; }
 
/* ---------- Pricing ---------- */
.price-card { position: relative; display: flex; flex-direction: column; }
.price-card .price { font-size: 1.4rem; font-weight: 800; color: var(--color-accent-dark); }
.price-card ul { padding-left: 1.1em; margin: 0 0 24px; color: var(--color-muted); flex: 1; }
.price-card li { margin-bottom: 6px; }
.price-card.featured { border: 2px solid var(--color-accent); transform: translateY(-8px); }
.badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background: var(--color-accent);
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
}
 
/* ---------- Services ---------- */
.dot-list { list-style: none; padding: 0; margin: 0; }
.dot-list li { padding: 10px 0 10px 22px; border-bottom: 1px dashed var(--color-border); position: relative; }
.dot-list li:last-child { border-bottom: 0; }
.dot-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  transform: translateY(-50%);
}
 
/* ---------- Milestones & partners ---------- */
.milestone-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 56px; }
.milestone { text-align: center; padding: 28px; border-left: 4px solid var(--color-accent); background: var(--color-bg-soft); border-radius: 0 var(--radius) var(--radius) 0; }
.milestone strong { display: block; font-size: 1.8rem; color: var(--color-primary); }
.milestone p { margin: 0; color: var(--color-muted); }
.partners { display: flex; flex-wrap: wrap; justify-content: center; gap: 28px; }
.partners img { opacity: .7; filter: grayscale(1); transition: opacity .2s, filter .2s; }
.partners img:hover { opacity: 1; filter: none; }
 
/* ---------- Contact ---------- */
.contact-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; }
.contact-list li { display: grid; grid-template-columns: 120px 1fr; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--color-border); }
.contact-list span { font-weight: 700; color: var(--color-primary); }
.map-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); min-height: 360px; background: #dfe7f1; }
.map-wrap iframe { display: block; width: 100%; height: 100%; min-height: 360px; border: 0; }
 
/* ---------- Footer ---------- */
.site-footer { background: #0b2a55; color: #c9d6e8; font-size: .95rem; }
.site-footer a { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 40px; padding-top: 64px; padding-bottom: 48px; }
.footer-title { color: #fff; font-size: 1.05rem; margin-bottom: 16px; }
.footer-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer-list strong { color: #fff; }
.socials { display: flex; gap: 16px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding: 18px 0; font-size: .875rem; text-align: center; }
.footer-bottom p { margin: 0; }
 
/* ---------- Nút nổi Gọi / Zalo ---------- */
.float-actions { position: fixed; right: 18px; bottom: 18px; z-index: 60; display: grid; gap: 10px; }
.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: .8rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, .2);
}
.float-btn:hover { text-decoration: none; transform: scale(1.06); }
.float-call { background: var(--color-accent); }
.float-zalo { background: #0068ff; }
 
/* ---------- Hiệu ứng hiện dần khi cuộn (JS thêm class .is-visible) ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}
 
/* ---------- Responsive: tablet ---------- */
@media (max-width: 960px) {
  .section { padding: 64px 0; }
  .hero-inner,
  .two-col,
  .feature { grid-template-columns: 1fr; gap: 32px; }
  .feature-reverse img { order: 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: 1fr; text-align: left; }
  .timeline::before { top: 0; bottom: 0; left: 26px; right: auto; width: 2px; height: auto; }
  .timeline li { display: grid; grid-template-columns: 54px 1fr; column-gap: 18px; text-align: left; }
  .timeline .step { grid-row: span 2; margin: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
 
  /* Menu điện thoại: ẩn, bấm nút ☰ mới hiện */
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 24px rgba(0, 0, 0, .08);
    padding: 8px 20px 20px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; border-bottom: 1px solid var(--color-border); }
  .main-nav a.nav-hotline { margin-top: 12px; border-bottom: 0; }
}
 
/* ---------- Responsive: điện thoại ---------- */
@media (max-width: 600px) {
  .grid-2,
  .milestone-row { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 64px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .contact-list li { grid-template-columns: 1fr; gap: 2px; }
  .footer-bottom { padding-bottom: 150px; } /* chừa chỗ cho 2 nút Gọi/Zalo nổi, khỏi che chữ */
}