/* ============================================================================
   Trang nội dung dạng văn bản: liên hệ (/lien-he/) và nhóm trang pháp lý
   (chính sách bảo mật, điều khoản, bảo hành, thanh toán, FAQ).

   Dùng lại token màu/chữ của marketing.css, chỉ thêm phần typography đọc dài
   và bố cục 2 cột cho trang liên hệ.
   ========================================================================== */

/* ---------------------------- Breadcrumb ---------------------------- */
.dn-crumb { margin: 0 0 22px; }
.dn-crumb ol {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  margin: 0; padding: 0; list-style: none;
  font-size: 13px; color: var(--dn-muted);
}
.dn-crumb li { display: flex; align-items: center; gap: 8px; }
.dn-crumb li + li::before { content: "›"; color: #b6c0d4; }
.dn-crumb a { color: var(--dn-muted); text-decoration: none; }
.dn-crumb a:hover { color: var(--dn-blue); text-decoration: underline; }
.dn-crumb [aria-current="page"] { color: var(--dn-ink); font-weight: 600; }

/* ------------------------ Khối văn bản chung ------------------------ */
.dn-doc { max-width: 900px; }
.dn-doc__head { padding-bottom: 26px; border-bottom: 1px solid var(--dn-line); }
.dn-doc__head h1 { margin: 0 0 12px; font-size: clamp(26px, 4vw, 36px); font-weight: 800; line-height: 1.25; }
.dn-doc__lead { margin: 0 0 10px; font-size: 16px; line-height: 1.7; color: var(--dn-muted); }
.dn-doc__updated { margin: 0; font-size: 13px; color: #97a2ba; }

.dn-doc__body { padding-top: 10px; }
.dn-doc__sec { padding-top: 30px; }
.dn-doc__sec h2 {
  margin: 0 0 12px; font-size: 19px; font-weight: 700; line-height: 1.35;
  color: var(--dn-ink);
}
.dn-doc__sec p { margin: 0 0 12px; font-size: 15px; line-height: 1.8; color: #45536f; }
.dn-doc__sec ul { margin: 0 0 12px; padding-left: 0; list-style: none; }
.dn-doc__sec li {
  position: relative; padding-left: 22px; margin-bottom: 9px;
  font-size: 15px; line-height: 1.75; color: #45536f;
}
.dn-doc__sec li::before {
  content: ""; position: absolute; left: 4px; top: 11px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--dn-blue);
}

/* ------------------------------- FAQ -------------------------------- */
.dn-doc__faq { padding-top: 26px; display: grid; gap: 12px; }
.dn-doc__qa {
  border: 1px solid var(--dn-line); border-radius: 14px; background: #fff;
  box-shadow: var(--dn-shadow); overflow: hidden;
}
.dn-doc__qa summary {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 17px 20px; cursor: pointer; list-style: none;
}
.dn-doc__qa summary::-webkit-details-marker { display: none; }
.dn-doc__qa summary h2 { margin: 0; font-size: 16px; font-weight: 600; line-height: 1.5; }
.dn-doc__qa summary::after {
  content: "+"; flex: none; width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center; background: var(--dn-tint);
  color: var(--dn-blue); font-size: 17px; font-weight: 600; line-height: 1;
}
.dn-doc__qa[open] summary::after { content: "–"; }
.dn-doc__qa[open] summary { border-bottom: 1px solid var(--dn-line); }
.dn-doc__qa p { margin: 0; padding: 16px 20px 19px; font-size: 15px; line-height: 1.8; color: #45536f; }

/* --------------------------- CTA cuối trang -------------------------- */
.dn-doc__cta {
  margin-top: 46px; padding: 30px 28px; border-radius: 18px;
  background: var(--dn-tint); border: 1px solid #d9e6fd;
}
.dn-doc__cta h2 { margin: 0 0 8px; font-size: 20px; font-weight: 700; }
.dn-doc__cta p { margin: 0 0 18px; font-size: 15px; line-height: 1.7; color: #45536f; }
.dn-doc__cta-row { display: flex; flex-wrap: wrap; gap: 10px; }

/* ============================== Liên hệ ============================== */
.dn-lh__head { max-width: 760px; padding-bottom: 8px; }
.dn-lh__head h1 { margin: 0 0 12px; font-size: clamp(26px, 4vw, 38px); font-weight: 800; line-height: 1.22; }
.dn-lh__lead { margin: 0; font-size: 16px; line-height: 1.75; color: var(--dn-muted); }

.dn-lh__grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 26px; align-items: start;
  padding-top: 34px;
}

.dn-lh__form-wrap, .dn-lh__info {
  background: #fff; border: 1px solid var(--dn-line); border-radius: 18px;
  padding: 28px; box-shadow: var(--dn-shadow);
}
.dn-lh__form-wrap h2, .dn-lh__info h2 { margin: 0 0 18px; font-size: 19px; font-weight: 700; }

.dn-lh__field { margin: 0 0 16px; display: grid; gap: 7px; }
.dn-lh__field label { font-size: 14px; font-weight: 600; color: var(--dn-ink); }
.dn-lh__field label span { color: #e4483d; }
.dn-lh__field input, .dn-lh__field select, .dn-lh__field textarea {
  width: 100%; padding: 12px 14px; font-size: 15px; color: var(--dn-ink);
  background: #fbfcfe; border: 1px solid var(--dn-line); border-radius: 11px;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.dn-lh__field textarea { resize: vertical; min-height: 118px; line-height: 1.65; }
.dn-lh__field input:focus, .dn-lh__field select:focus, .dn-lh__field textarea:focus {
  outline: none; background: #fff; border-color: var(--dn-blue-soft);
  box-shadow: 0 0 0 3px rgba(40, 126, 246, .15);
}

/* Bẫy bot: ẩn hẳn khỏi mắt người dùng nhưng vẫn nằm trong DOM cho bot điền. */
.dn-lh__hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.dn-lh__submit {
  width: 100%; padding: 14px 22px; margin-top: 4px;
  font-size: 15px; font-weight: 600; color: #fff; cursor: pointer;
  background: linear-gradient(135deg, var(--dn-blue), var(--dn-blue-deep));
  border: 0; border-radius: 11px;
  transition: transform .15s, box-shadow .15s;
}
.dn-lh__submit:hover { transform: translateY(-1px); box-shadow: 0 12px 24px -12px rgba(13, 79, 214, .75); }

.dn-lh__privacy { margin: 14px 0 0; font-size: 13px; line-height: 1.65; color: var(--dn-muted); }
.dn-lh__privacy a { color: var(--dn-blue); }
.dn-lh__note { margin: 0 0 14px; font-size: 13.5px; color: var(--dn-muted); }
.dn-lh__note code { padding: 2px 7px; border-radius: 6px; background: var(--dn-tint); color: var(--dn-blue-deep); }

.dn-lh__ok, .dn-lh__err {
  margin: 0; padding: 16px 18px; border-radius: 12px;
  font-size: 15px; line-height: 1.7;
}
.dn-lh__ok { background: #e8f8ee; border: 1px solid #b9e6c9; color: #1c6b3a; }
.dn-lh__err { background: #fdecea; border: 1px solid #f5c6c2; color: #9b2c22; }
.dn-lh__err p { margin: 0 0 6px; }
.dn-lh__err p:last-child { margin: 0; }

.dn-lh__list { margin: 0 0 22px; padding: 0; list-style: none; display: grid; gap: 15px; }
.dn-lh__list li { display: grid; gap: 3px; }
.dn-lh__k { font-size: 13px; color: var(--dn-muted); }
.dn-lh__v { font-size: 15.5px; font-weight: 600; color: var(--dn-ink); text-decoration: none; }
a.dn-lh__v:hover { color: var(--dn-blue); }

.dn-lh__chips { display: flex; flex-wrap: wrap; gap: 9px; padding-bottom: 18px; }
.dn-lh__xem { margin: 0; font-size: 14px; line-height: 1.7; color: var(--dn-muted); }
.dn-lh__xem a { color: var(--dn-blue); }

/* ------------------------------ Mobile ------------------------------ */
@media (max-width: 900px) {
  .dn-lh__grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .dn-lh__form-wrap, .dn-lh__info { padding: 22px 18px; }
  .dn-doc__cta { padding: 24px 20px; }
}