/* ============================================================================
   DOMI TECHNOLOGY — LỚP BỔ SUNG CHO TRANG BÁN HÀNG (sale page)
   File này CHỈ dùng cho domi-hvac-ai.html (trang bán hàng sản phẩm).
   Nạp SAU assets/style.css — kế thừa toàn bộ token & component của web chính,
   chỉ thêm những khối mà trang bán hàng cần mà website chưa có.

   Nguyên tắc:
   — Giữ nguyên hệ nhận diện web: Be Vietnam Pro, navy + xanh điện, GÓC VUÔNG.
   — Mượn CAM #FF8A1E của squeeze page lead.domitech.ai làm MÀU HÀNH ĐỘNG:
     chỉ dùng cho nút chốt chính, nhãn khan hiếm và quà tặng — không dùng tràn lan.
   — Mọi class có tiền tố .sp- để không đụng class của website.

   MỤC LỤC
   01. Token bổ sung (cam hành động)
   02. Nút cam (.sp-btn-cta) + thanh CTA dính đáy màn hình
   03. Hero trang bán hàng
   04. Dải nỗi đau (.sp-pain)
   05. Khối trước–sau (.sp-ba)
   06. Dây chuyền 6 Tool dạng thẻ ngang (.sp-tools)
   07. Khối bằng chứng / lời khách (.sp-proof)
   08. Bảng giá 5 gói (.sp-plans) + bậc thang tổ chức (.sp-tier)
   09. Khối quà tặng Add-in (.sp-gift)
   10. Máy tính hoàn vốn (.sp-roi)
   11. FAQ đóng/mở (.sp-faq)
   12. Bảo đảm & rủi ro (.sp-guarantee)
   13. Form chốt (.sp-form)
   14. Tiện ích & responsive
   ============================================================================ */

/* ---------------------------------------------------------------------------
   01. TOKEN BỔ SUNG
   --------------------------------------------------------------------------- */
:root {
  --amber-500: #FF8A1E;   /* cam hành động — lấy từ squeeze page lead.domitech.ai */
  --amber-600: #E57200;   /* cam đậm — trạng thái hover */
  --amber-050: #FFF4E8;   /* nền cam rất nhạt cho khối quà tặng */
  --green-600: #1D8A4E;   /* xanh lá — tín hiệu an toàn/miễn phí */
  --red-600:   #C42B1C;   /* đỏ — chi phí đang mất, cảnh báo */
}

/* ---------------------------------------------------------------------------
   02. NÚT CAM + THANH CTA DÍNH ĐÁY
   --------------------------------------------------------------------------- */
.sp-btn-cta {
  background: var(--amber-500); color: #fff; border-color: var(--amber-500);
}
.sp-btn-cta:hover {
  background: var(--amber-600); border-color: var(--amber-600); color: #fff;
  box-shadow: 0 10px 26px rgba(255, 138, 30, .38);
}
/* Trên nền tối, nút chính của style.css bị ép thành trắng — ghi đè lại cho nút cam */
.on-dark .sp-btn-cta, .bg-navy .sp-btn-cta, .bg-dark .sp-btn-cta {
  background: var(--amber-500); color: #fff;
}
.on-dark .sp-btn-cta:hover, .bg-navy .sp-btn-cta:hover, .bg-dark .sp-btn-cta:hover {
  background: var(--amber-600); color: #fff;
}

/* Thanh CTA dính đáy — hiện sau khi cuộn qua hero */
.sp-sticky {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  background: rgba(6, 13, 31, .96);
  border-top: 1px solid var(--line-dark);
  backdrop-filter: saturate(140%) blur(8px);
  transform: translateY(110%);
  transition: transform .28s var(--ease);
}
.sp-sticky.show { transform: translateY(0); }
.sp-sticky .container {
  display: flex; align-items: center; gap: 20px;
  padding-top: 12px; padding-bottom: 12px;
}
.sp-sticky-text { color: var(--text-invert); font-size: .95rem; line-height: 1.4; }
.sp-sticky-text b { color: #fff; font-weight: 600; }
.sp-sticky-text small { display: block; color: var(--muted-dark); font-size: .82rem; }
.sp-sticky-actions { display: flex; gap: 10px; margin-left: auto; flex-shrink: 0; }
.sp-sticky .btn { padding: 12px 26px; font-size: .95rem; }

/* ---------------------------------------------------------------------------
   03. HERO TRANG BÁN HÀNG
   --------------------------------------------------------------------------- */
.sp-hero .container { grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.sp-hero h1 { font-size: clamp(2.2rem, 4.6vw, 3.5rem); }
.sp-hero .sp-hero-sub { margin-top: 22px; font-size: 1.12rem; line-height: 1.7; color: #C4D2EA; }
.sp-hero .sp-hero-sub strong { color: #fff; font-weight: 600; }

/* Gạch đầu dòng lợi ích trong hero */
.sp-hero-points { list-style: none; margin-top: 28px; display: grid; gap: 12px; }
.sp-hero-points li {
  position: relative; padding-left: 30px;
  color: #DCE6F7; font-size: 1rem; line-height: 1.55;
}
.sp-hero-points li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--amber-500); font-weight: 700;
}
.sp-hero-points b { color: #fff; font-weight: 600; }

/* Dải "dành cho ai" dưới CTA */
.sp-for {
  margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--line-dark);
  font-size: .88rem; color: var(--muted-dark);
}
.sp-for b { color: #C4D2EA; font-weight: 600; }

/* ---------------------------------------------------------------------------
   04. DẢI NỖI ĐAU
   --------------------------------------------------------------------------- */
.sp-pain { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.sp-pain > div { padding: 30px 32px; border-left: 1px solid var(--line); }
.sp-pain > div:first-child { border-left: 0; padding-left: 0; }
.sp-pain h3 { font-size: 1.05rem; margin-bottom: 10px; }
.sp-pain p { color: var(--text-soft); font-size: .96rem; }
.sp-pain .sp-quote {
  margin-top: 14px; padding-left: 14px; border-left: 2px solid var(--amber-500);
  font-style: italic; color: var(--text); font-size: .95rem;
}
.sp-pain .sp-quote cite { display: block; margin-top: 6px; font-style: normal; font-size: .82rem; color: var(--text-soft); }

/* ---------------------------------------------------------------------------
   05. KHỐI TRƯỚC – SAU
   --------------------------------------------------------------------------- */
.sp-ba { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); }
.sp-ba > div { padding: 34px 36px; }
.sp-ba .sp-ba-before { background: var(--bg-soft); }
.sp-ba .sp-ba-after  { background: #fff; border-left: 1px solid var(--line); }
.sp-ba h3 { font-size: .82rem; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 20px; }
.sp-ba .sp-ba-before h3 { color: var(--red-600); }
.sp-ba .sp-ba-after h3  { color: var(--green-600); }
.sp-ba ul { list-style: none; display: grid; gap: 14px; }
.sp-ba li { position: relative; padding-left: 26px; color: var(--text-soft); font-size: .98rem; line-height: 1.55; }
.sp-ba .sp-ba-before li::before { content: "✕"; position: absolute; left: 0; color: var(--red-600); font-weight: 700; }
.sp-ba .sp-ba-after  li::before { content: "✓"; position: absolute; left: 0; color: var(--green-600); font-weight: 700; }
.sp-ba li b { color: var(--text); font-weight: 600; }

/* ---------------------------------------------------------------------------
   06. DÂY CHUYỀN 6 TOOL — thẻ ngang có số
   --------------------------------------------------------------------------- */
.sp-tools { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.sp-tools > div { background: #fff; padding: 30px 28px; }
.sp-tools .sp-tool-no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; margin-bottom: 16px;
  background: var(--navy-900); color: #fff;
  font-size: .9rem; font-weight: 700;
}
.sp-tools h3 { font-size: 1.05rem; margin-bottom: 8px; }
.sp-tools p { color: var(--text-soft); font-size: .95rem; }
.sp-tools .sp-io { margin-top: 14px; font-size: .84rem; color: var(--navy-700); }
.sp-tools .sp-io b { font-weight: 600; }

/* ---------------------------------------------------------------------------
   07. BẰNG CHỨNG / LỜI KHÁCH
   --------------------------------------------------------------------------- */
.sp-proof { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.sp-quote-card {
  padding: 30px 32px; border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, .04);
}
.sp-quote-card blockquote { font-size: 1.08rem; line-height: 1.65; color: var(--text-invert); }
.sp-quote-card blockquote::before { content: "“"; color: var(--amber-500); font-size: 2rem; line-height: 0; vertical-align: -.35em; margin-right: 4px; }
.sp-quote-card figcaption { margin-top: 18px; font-size: .9rem; color: var(--muted-dark); }
.sp-quote-card figcaption b { display: block; color: #fff; font-weight: 600; font-size: .98rem; }
.sp-quote-card .sp-tag {
  display: inline-block; margin-top: 12px; padding: 3px 10px;
  font-size: .74rem; letter-spacing: .06em; text-transform: uppercase;
  background: rgba(125, 211, 252, .14); color: var(--cyan-300);
}

/* ---------------------------------------------------------------------------
   08. BẢNG GIÁ 5 GÓI + BẬC THANG TỔ CHỨC
   --------------------------------------------------------------------------- */
.sp-plans { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; align-items: stretch; }
.sp-plans .plan { padding: 26px 20px; }
.sp-plans .plan h3 { font-size: 1rem; letter-spacing: .02em; }
.sp-plans .plan .sp-plan-for { margin-top: 6px; font-size: .84rem; color: var(--text-soft); min-height: 3.2em; }
.sp-plans .plan .price { font-size: 1.42rem; white-space: nowrap; }
.sp-plans .plan .per { font-size: .84rem; }
.sp-plans .plan .btn { padding: 11px 12px; font-size: .9rem; }
.sp-plans .plan.best { border-color: var(--amber-500); }
.sp-plans .plan.best::before { background: var(--amber-500); }
.sp-plans .plan.best .badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  white-space: nowrap; background: var(--amber-500); color: #fff;
}
.sp-plan-nam {
  margin-top: 12px; padding-top: 11px; border-top: 1px dashed var(--line);
  font-size: .95rem; font-weight: 600; color: var(--navy-700); white-space: nowrap;
}
.sp-plan-nam span { display: block; margin-top: 4px; font-weight: 400; font-size: .8rem; color: var(--text-soft); white-space: normal; }
.sp-plans .plan ul { margin-top: 16px; }
.sp-plans .plan li { font-size: .88rem; padding: 7px 0 7px 22px; }
.sp-plans .plan li::before { top: 7px; }

/* Bậc thang chiết khấu tổ chức */
.sp-tier { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border: 1px solid var(--line-dark); }
.sp-tier > div { padding: 22px 18px; border-left: 1px solid var(--line-dark); text-align: center; }
.sp-tier > div:first-child { border-left: 0; }
.sp-tier .sp-tier-no { font-size: .84rem; color: var(--muted-dark); letter-spacing: .08em; text-transform: uppercase; }
.sp-tier .sp-tier-off { margin-top: 8px; font-size: 1.7rem; font-weight: 300; color: #fff; letter-spacing: -.02em; }
.sp-tier .sp-tier-off strong { font-weight: 700; color: var(--amber-500); }
.sp-tier .sp-tier-vd { margin-top: 8px; font-size: .84rem; color: var(--muted-dark); }

/* ---------------------------------------------------------------------------
   09. KHỐI QUÀ TẶNG ADD-IN
   --------------------------------------------------------------------------- */
.sp-gift {
  border: 1px solid var(--amber-500); background: var(--amber-050);
  padding: 40px 44px;
}
.sp-gift .sp-gift-tag {
  display: inline-block; padding: 5px 14px; margin-bottom: 18px;
  background: var(--amber-500); color: #fff;
  font-size: .76rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
}
.sp-gift h2 { margin-bottom: 16px; }
.sp-gift .sp-gift-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; margin-top: 26px; }
.sp-gift ul { list-style: none; display: grid; gap: 12px; }
.sp-gift li { position: relative; padding-left: 26px; color: var(--text-soft); font-size: .97rem; }
.sp-gift li::before { content: "✦"; position: absolute; left: 0; color: var(--amber-600); }
.sp-gift .sp-gift-dk {
  background: #fff; border: 1px solid var(--line); padding: 24px 26px;
}
.sp-gift .sp-gift-dk h3 { font-size: .95rem; margin-bottom: 14px; }
.sp-gift .sp-gift-dk p { font-size: .92rem; color: var(--text-soft); margin-bottom: 10px; }
.sp-gift .sp-gift-dk strong { color: var(--text); }

/* ---------------------------------------------------------------------------
   10. MÁY TÍNH HOÀN VỐN
   --------------------------------------------------------------------------- */
.sp-roi { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.sp-roi .sp-roi-in { display: grid; gap: 20px; }
.sp-roi label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 8px; }
.sp-roi input, .sp-roi select {
  width: 100%; padding: 13px 14px; font-family: var(--font); font-size: 1rem;
  border: 1px solid var(--line); background: #fff; color: var(--text); border-radius: 0;
}
.sp-roi input:focus, .sp-roi select:focus { outline: none; border-color: var(--blue-500); }
.sp-roi .sp-roi-out { background: var(--navy-900); color: var(--text-invert); padding: 34px 36px; }
.sp-roi .sp-roi-out .sp-roi-num { font-size: 2.4rem; font-weight: 300; letter-spacing: -.02em; color: #fff; }
.sp-roi .sp-roi-out .sp-roi-num strong { font-weight: 700; color: var(--amber-500); }
.sp-roi .sp-roi-out dl { margin-top: 22px; display: grid; gap: 12px; font-size: .95rem; }
.sp-roi .sp-roi-out .sp-roi-row { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line-dark); padding-top: 12px; }
.sp-roi .sp-roi-out .sp-roi-row dt { color: var(--muted-dark); }
.sp-roi .sp-roi-out .sp-roi-row dd { font-weight: 600; color: #fff; white-space: nowrap; }
.sp-roi .sp-roi-note { margin-top: 20px; font-size: .84rem; color: var(--muted-dark-2); line-height: 1.6; }

/* ---------------------------------------------------------------------------
   11. FAQ ĐÓNG/MỞ
   --------------------------------------------------------------------------- */
.sp-faq { max-width: var(--maxw-narrow); margin: 0 auto; }
.sp-faq details { border-top: 1px solid var(--line); }
.sp-faq details:last-child { border-bottom: 1px solid var(--line); }
.sp-faq summary {
  list-style: none; cursor: pointer; padding: 22px 44px 22px 0; position: relative;
  font-weight: 600; font-size: 1.05rem; line-height: 1.45;
}
.sp-faq summary::-webkit-details-marker { display: none; }
.sp-faq summary::after {
  content: "+"; position: absolute; right: 8px; top: 18px;
  font-size: 1.5rem; font-weight: 300; color: var(--blue-500);
  transition: transform .2s var(--ease);
}
.sp-faq details[open] summary::after { content: "−"; }
.sp-faq summary:hover { color: var(--blue-600); }
.sp-faq .sp-faq-a { padding: 0 44px 24px 0; color: var(--text-soft); font-size: 1rem; line-height: 1.7; }
.sp-faq .sp-faq-a p + p { margin-top: 12px; }
.sp-faq .sp-faq-a ul { margin-top: 10px; padding-left: 20px; }
.sp-faq .sp-faq-a li { margin: 6px 0; }

/* ---------------------------------------------------------------------------
   12. BẢO ĐẢM & RỦI RO
   --------------------------------------------------------------------------- */
.sp-guarantee {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.sp-guarantee > div { padding: 28px 30px; border: 1px solid var(--line); background: #fff; }
.sp-guarantee h3 { font-size: 1.02rem; margin-bottom: 10px; }
.sp-guarantee p { color: var(--text-soft); font-size: .95rem; }
.sp-guarantee .sp-g-icon { font-size: 1.5rem; color: var(--green-600); margin-bottom: 12px; display: block; }

/* ---------------------------------------------------------------------------
   13. FORM CHỐT
   --------------------------------------------------------------------------- */
.sp-form-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.sp-form-card { background: #fff; padding: 36px 38px; box-shadow: var(--shadow-card); }
.sp-form-card h3 { font-size: 1.25rem; margin-bottom: 6px; }
.sp-form-card .sp-form-sub { font-size: .93rem; color: var(--text-soft); margin-bottom: 24px; }
.sp-form-card .btn { width: 100%; }
.sp-form-note { margin-top: 14px; font-size: .82rem; color: var(--text-soft); line-height: 1.6; }
.sp-msg { padding: 16px 18px; font-size: .95rem; margin-bottom: 18px; }
.sp-msg-ok  { background: #E9F7EF; border-left: 3px solid var(--green-600); color: #14532D; }
.sp-msg-err { background: #FDECEA; border-left: 3px solid var(--red-600); color: #7F1D1D; }

/* Cột trái của form: lý do hành động */
.sp-why li { position: relative; padding: 14px 0 14px 30px; border-top: 1px solid var(--line-dark); color: #C4D2EA; }
.sp-why li:first-child { border-top: 0; }
.sp-why li::before { content: "→"; position: absolute; left: 0; color: var(--amber-500); font-weight: 700; }
.sp-why b { color: #fff; font-weight: 600; }
.sp-why { list-style: none; }

/* ---------------------------------------------------------------------------
   14. TIỆN ÍCH & RESPONSIVE
   --------------------------------------------------------------------------- */
.sp-center { text-align: center; }
.sp-mt-1 { margin-top: 12px; }
.sp-mt-2 { margin-top: 24px; }
.sp-mt-3 { margin-top: 36px; }
.sp-mt-4 { margin-top: 52px; }
.sp-src { font-size: .82rem; color: var(--text-soft); line-height: 1.6; }
.on-dark .sp-src { color: var(--muted-dark-2); }
.sp-hr { height: 1px; background: var(--line); border: 0; margin: 0; }

/* Cỡ màn hình trung bình */
@media (max-width: 1100px) {
  .sp-plans { grid-template-columns: repeat(3, 1fr); }
  .sp-tier  { grid-template-columns: repeat(3, 1fr); }
  .sp-tier > div:nth-child(4) { border-left: 0; }
}

@media (max-width: 900px) {
  .sp-hero .container { grid-template-columns: 1fr; gap: 40px; }
  .sp-pain { grid-template-columns: 1fr; }
  .sp-pain > div { border-left: 0; border-top: 1px solid var(--line); padding: 26px 0; }
  .sp-pain > div:first-child { border-top: 0; padding-top: 0; }
  .sp-ba { grid-template-columns: 1fr; }
  .sp-ba .sp-ba-after { border-left: 0; border-top: 1px solid var(--line); }
  .sp-tools { grid-template-columns: repeat(2, 1fr); }
  .sp-proof { grid-template-columns: 1fr; }
  .sp-gift .sp-gift-grid { grid-template-columns: 1fr; gap: 26px; }
  .sp-roi { grid-template-columns: 1fr; gap: 28px; }
  .sp-guarantee { grid-template-columns: 1fr; }
  .sp-form-wrap { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .sp-plans { grid-template-columns: 1fr; }
  .sp-tier  { grid-template-columns: 1fr; }
  .sp-tier > div { border-left: 0; border-top: 1px solid var(--line-dark); text-align: left; }
  .sp-tier > div:first-child { border-top: 0; }
  .sp-tools { grid-template-columns: 1fr; }
  .sp-gift { padding: 28px 22px; }
  .sp-form-card { padding: 26px 22px; }
  /* Thanh CTA đáy: xếp dọc, chỉ giữ nút chính */
  .sp-sticky .container { flex-wrap: wrap; gap: 10px; }
  .sp-sticky-text { display: none; }
  .sp-sticky-actions { margin-left: 0; width: 100%; }
  .sp-sticky-actions .btn { flex: 1; text-align: center; padding: 13px 10px; }
  /* Chừa chỗ cho thanh dính, tránh che nội dung cuối trang */
  body.sp-has-sticky { padding-bottom: 72px; }
}