/* ==========================================================================
   TOKEN — bảng màu "ánh LED & vân gỗ"
   Nội thất = cyan ánh đèn LED  |  Ngoại thất = cam vân gỗ  |  CTA = cam tín hiệu
   ========================================================================== */
:root {
  --ink: #0c1524;          /* nền tối & chữ chính */
  --ink-soft: #4b5871;     /* chữ phụ */
  --paper: #ffffff;
  --mist: #f2f6fb;         /* nền section nhạt, lạnh như ánh LED */
  --led: #1fc4ec;          /* cyan LED — nội thất */
  --led-dark: #0e9fc4;
  --led-soft: #e0f7fd;
  --wood: #c97b3d;         /* cam vân gỗ — ngoại thất */
  --wood-soft: #fbeede;
  --cta: #ff6a00;          /* cam tín hiệu — nút chuyển đổi */
  --cta-dark: #e55e00;
  --line: #dfe7f0;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 6px 24px rgba(12, 21, 36, 0.08);
  --shadow-lg: 0 16px 48px rgba(12, 21, 36, 0.16);
  --display: "Bricolage Grotesque", "Be Vietnam Pro", sans-serif;
  --body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--body); color: var(--ink); line-height: 1.65; background: var(--paper); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 18px; }
.container-narrow { max-width: 820px; }
.center { text-align: center; }
.accent { color: var(--led); }

/* Vạch sáng LED — chữ ký thiết kế, dùng lặp lại toàn trang */
.light-line {
  height: 2px; border: 0; border-radius: 2px;
  background: linear-gradient(90deg, var(--led), #8deaff 60%, transparent);
  box-shadow: 0 0 12px rgba(31, 196, 236, 0.55);
}

/* Nhãn nhỏ trên tiêu đề section */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--led-dark);
}
.eyebrow::before { content: ""; width: 26px; height: 2px; border-radius: 2px;
  background: var(--led); box-shadow: 0 0 8px rgba(31, 196, 236, 0.6); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .eyebrow::after { content: ""; width: 26px; height: 2px; border-radius: 2px;
  background: var(--led); box-shadow: 0 0 8px rgba(31, 196, 236, 0.6); }
.section-head .eyebrow::before { flex-shrink: 0; }

/* ============ NÚT ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 14px; font-weight: 700; font-size: 15px;
  border: none; cursor: pointer; transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  font-family: var(--body); text-align: center;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--cta); color: #fff; box-shadow: 0 6px 20px rgba(255, 106, 0, 0.38); }
.btn-primary:hover { background: var(--cta-dark); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(255, 106, 0, 0.45); }
.btn-ghost { background: rgba(255, 255, 255, 0.1); color: #fff; border: 1.5px solid rgba(255, 255, 255, 0.55); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.22); }
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-call { background: var(--cta); color: #fff; padding: 9px 18px; font-size: 14px; white-space: nowrap; flex-shrink: 0; }
.btn-call:hover { background: var(--cta-dark); }

/* ============ HEADER ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 12px; }
.logo { display: flex; align-items: center; gap: 8px; font-family: var(--display); font-size: 20px; font-weight: 800; white-space: nowrap; }
.logo-icon { color: var(--led); font-size: 24px; line-height: 1; filter: drop-shadow(0 0 6px rgba(31, 196, 236, 0.7)); }
.logo strong { color: var(--led-dark); }
.header-nav { display: none; gap: 30px; font-weight: 600; font-size: 14.5px; color: var(--ink-soft); }
.header-nav a:hover { color: var(--led-dark); }
@media (max-width: 400px) { .logo { font-size: 17px; } .btn-call { padding: 8px 12px; font-size: 13px; } }

/* ============ HERO ============ */
.hero { position: relative; color: #fff; overflow: hidden; background: var(--ink); }
.hero-bg {
  position: absolute; inset: 0;
  background: url("../assets/img/hero/hero-mobile.webp") center/cover no-repeat;
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(31, 196, 236, 0.28), transparent 62%),
    linear-gradient(100deg, rgba(12, 21, 36, 0.94) 8%, rgba(12, 21, 36, 0.72) 52%, rgba(12, 21, 36, 0.38) 100%);
}
.hero-inner { position: relative; padding: 62px 18px 40px; }
.hero .eyebrow { color: #7be2fb; margin-bottom: 16px; }
.hero h1 {
  font-family: var(--display); font-size: clamp(34px, 6vw, 58px); line-height: 1.08;
  font-weight: 800; letter-spacing: -0.015em; margin-bottom: 18px;
}
.hero h1 .hl { position: relative; white-space: nowrap; }
.hero h1 .hl::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -3px; height: 3px; border-radius: 3px;
  background: linear-gradient(90deg, var(--led), #a5efff);
  box-shadow: 0 0 16px rgba(31, 196, 236, 0.9), 0 0 40px rgba(31, 196, 236, 0.4);
  animation: lineIn 0.9s ease 0.3s both;
}
@keyframes lineIn { from { transform: scaleX(0); transform-origin: left; } to { transform: scaleX(1); } }
.hero-sub { font-size: clamp(15px, 2.2vw, 17.5px); color: rgba(255, 255, 255, 0.82); max-width: 560px; margin-bottom: 22px; }
.hero-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(123, 226, 251, 0.4);
  color: #d8f6ff; padding: 8px 15px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
  backdrop-filter: blur(6px);
}
.hero-cta { display: flex; flex-direction: column; gap: 12px; max-width: 430px; }

/* Dải số liệu nổi cuối hero */
.hero-stats {
  position: relative; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  background: var(--line); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-lg); transform: translateY(46px); margin-top: -8px;
}
.stat { background: var(--paper); color: var(--ink); text-align: center; padding: 20px 10px 17px; }
.stat strong { display: block; font-family: var(--display); font-size: 30px; font-weight: 800; line-height: 1.1; }
.stat strong em { font-style: normal; color: var(--led-dark); }
.stat span { font-size: 12.5px; color: var(--ink-soft); font-weight: 500; }
.hero-stats-spacer { height: 46px; background: transparent; }

/* ============ SECTION CHUNG ============ */
.section { padding: 96px 0 72px; }
.section-mist { background: var(--mist); }
.section-dark { background: var(--ink); color: #fff; }
.section-title {
  font-family: var(--display); font-size: clamp(27px, 4.2vw, 42px); font-weight: 800;
  letter-spacing: -0.01em; line-height: 1.15; margin: 10px 0 12px;
}
.section-sub { color: var(--ink-soft); max-width: 620px; margin: 0 auto; font-size: 15.5px; }
.section-dark .section-sub { color: rgba(255, 255, 255, 0.72); }

/* ============ VẤN ĐỀ CỐT LÕI ============ */
.pain-grid { display: grid; gap: 16px; }
.pain-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px; box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s;
}
.pain-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.pain-card .light-line { margin: 15px 0; }
.pain, .gain { display: flex; gap: 11px; font-size: 14.5px; align-items: flex-start; }
.pain { color: var(--ink-soft); }
.gain { font-weight: 600; }
.mark {
  flex-shrink: 0; width: 24px; height: 24px; border-radius: 8px; margin-top: 1px;
  display: inline-flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 800;
}
.mark-x { background: #feeceb; color: #d5372c; }
.mark-v { background: var(--led-soft); color: var(--led-dark); }

/* ============ 6 LỢI ÍCH TRẦN NHÔM TỔ ONG ============ */
.benefit-zone {
  margin-top: 64px; padding: 6px 16px 20px;
  background: linear-gradient(180deg, #e7eef7, #dde8f3);
  border: 1px solid #c8d6e5; border-radius: 24px;
}
.benefit-head { text-align: center; margin: 30px 0 32px; }
.benefit-head .eyebrow::after { content: ""; width: 26px; height: 2px; border-radius: 2px;
  background: var(--led); box-shadow: 0 0 8px rgba(31, 196, 236, 0.6); }
.benefit-head h3 {
  font-family: var(--display); font-size: clamp(22px, 3.2vw, 31px); font-weight: 800;
  letter-spacing: -0.01em; line-height: 1.2; margin: 10px auto 10px; max-width: 640px;
}
.benefit-grid { display: grid; gap: 16px; }
.benefit-card {
  background: var(--paper); border: 2px solid #9fb6cf; border-radius: var(--radius);
  padding: 24px 22px; box-shadow: 0 2px 10px rgba(12, 21, 36, 0.06);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.benefit-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--led); }
.benefit-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 14px;
  background: var(--led-soft); color: var(--led-dark); margin-bottom: 14px;
}
.benefit-card h4 { font-size: 16.5px; font-weight: 700; margin-bottom: 6px; }
.benefit-card p { font-size: 14px; color: var(--ink-soft); }
.benefit-cta {
  position: relative; overflow: hidden; margin-top: 28px;
  background:
    radial-gradient(480px 220px at 4% 0%, rgba(31, 196, 236, 0.22), transparent 60%),
    var(--ink);
  color: #fff; border-radius: var(--radius); padding: 30px 26px;
  display: flex; flex-direction: column; gap: 20px; align-items: flex-start;
}
.benefit-cta::before {
  content: ""; position: absolute; top: 0; left: 0; right: 30%; height: 2px;
  background: linear-gradient(90deg, var(--led), transparent);
  box-shadow: 0 0 14px rgba(31, 196, 236, 0.8);
}
.benefit-cta p { font-size: 15.5px; line-height: 1.7; }
.benefit-cta p strong { font-family: var(--display); font-size: 17.5px; }
.benefit-cta .btn { flex-shrink: 0; }

/* ============ DỊCH VỤ ============ */
.service-grid { display: grid; gap: 26px; }
.service-card {
  background: var(--paper); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border-top: 3px solid transparent;
  transition: transform 0.25s, box-shadow 0.25s;
}
.service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.svc-noi { border-top-color: var(--led); }
.svc-ngoai { border-top-color: var(--wood); }
.service-card img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.service-body { padding: 26px 24px; }
.svc-tag {
  display: inline-block; font-size: 11.5px; font-weight: 800; letter-spacing: 0.12em;
  padding: 5px 12px; border-radius: 999px; margin-bottom: 12px;
}
.svc-noi .svc-tag { background: var(--led-soft); color: var(--led-dark); }
.svc-ngoai .svc-tag { background: var(--wood-soft); color: var(--wood); }
.service-body h3 { font-family: var(--display); font-size: 23px; font-weight: 800; margin-bottom: 10px; }
.service-body p { color: var(--ink-soft); font-size: 14.5px; margin-bottom: 15px; }
.service-list { margin-bottom: 22px; display: grid; gap: 8px; }
.service-list li { padding-left: 25px; position: relative; font-size: 14.5px; font-weight: 500; }
.svc-noi .service-list li::before { content: "＋"; position: absolute; left: 3px; color: var(--led-dark); font-weight: 800; }
.svc-ngoai .service-list li::before { content: "＋"; position: absolute; left: 3px; color: var(--wood); font-weight: 800; }

/* ============ GALLERY ============ */
.gallery-filter { display: flex; justify-content: center; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
.filter-btn {
  padding: 10px 22px; border-radius: 12px; border: 1.5px solid var(--line);
  background: var(--paper); font-family: var(--body); font-size: 14.5px; font-weight: 700;
  cursor: pointer; transition: all 0.18s; color: var(--ink-soft);
}
.filter-btn:hover { border-color: var(--led); color: var(--led-dark); }
.filter-btn.active[data-filter="all"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.filter-btn.active[data-filter="noi-that"] { background: var(--led); border-color: var(--led); color: var(--ink); }
.filter-btn.active[data-filter="ngoai-that"] { background: var(--wood); border-color: var(--wood); color: #fff; }
.gallery-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.gallery-item {
  border-radius: var(--radius-sm); overflow: hidden; cursor: pointer; position: relative;
  aspect-ratio: 1; background: var(--mist); border: none; padding: 0;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s; }
.gallery-item:hover img { transform: scale(1.07); }
.gallery-item.hide { display: none; }
.gallery-note { text-align: center; color: var(--ink-soft); font-size: 13.5px; margin-top: 18px; }

/* ============ MẪU TẤM ============ */
.sample-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.sample-card {
  background: var(--paper); border-radius: var(--radius-sm); overflow: hidden;
  box-shadow: var(--shadow); cursor: pointer; border: 1px solid var(--line);
  padding: 0; font-family: var(--body); transition: transform 0.2s;
}
.sample-card:hover { transform: translateY(-3px); }
.sample-card img { aspect-ratio: 1; object-fit: cover; width: 100%; }
.sample-card .sample-name { padding: 11px 12px; font-size: 13px; font-weight: 700; color: var(--ink); text-align: center; display: block; }

/* ============ QUY TRÌNH ============ */
.process { counter-reset: step; display: grid; max-width: 720px; margin: 0 auto; }
.process li { counter-increment: step; position: relative; padding: 0 0 36px 70px; }
.process li::before {
  content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: -4px;
  font-family: var(--display); font-size: 26px; font-weight: 800; color: var(--led-dark);
  width: 48px; height: 48px; display: flex; align-items: center; justify-content: center;
  background: var(--led-soft); border-radius: 14px;
}
.process li:not(:last-child)::after {
  content: ""; position: absolute; left: 23px; top: 50px; bottom: 6px; width: 2px; border-radius: 2px;
  background: linear-gradient(to bottom, var(--led), transparent);
}
.process li strong { display: block; font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.process li span { color: var(--ink-soft); font-size: 14.5px; }

/* ============ BẢNG GIÁ ============ */
.section-dark .eyebrow { color: #7be2fb; }
.price-table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.price-table { width: 100%; border-collapse: collapse; background: var(--paper); color: var(--ink); min-width: 520px; }
.price-table th {
  background: var(--ink); color: #fff; text-align: left;
  padding: 15px 18px; font-size: 14px; letter-spacing: 0.02em;
  border-bottom: 2px solid var(--led);
}
.price-table td { padding: 13px 18px; border-bottom: 1px solid #eef1f5; font-size: 14.5px; }
.price-table td:last-child { font-weight: 800; color: var(--cta-dark); white-space: nowrap; font-family: var(--display); }
.price-table tbody tr:hover { background: var(--led-soft); }
.price-note { text-align: center; margin: 26px auto; max-width: 560px; font-size: 14.5px; color: rgba(255, 255, 255, 0.85); }

/* ============ ĐÁNH GIÁ ============ */
.review-grid { display: grid; gap: 20px; }
.review {
  background: var(--mist); border-radius: var(--radius); padding: 26px;
  position: relative; overflow: hidden;
}
.review::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(to bottom, var(--led), transparent);
  box-shadow: 0 0 10px rgba(31, 196, 236, 0.5);
}
.stars { color: #ffb400; font-size: 17px; letter-spacing: 2px; margin-bottom: 10px; }
.review p { font-size: 14.5px; font-style: italic; margin-bottom: 14px; }
.review footer { font-size: 13.5px; color: var(--ink-soft); }

/* ============ FAQ ============ */
.faq-list { display: grid; gap: 12px; }
.faq-item { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; }
.faq-item summary {
  padding: 17px 48px 17px 20px; font-weight: 700; font-size: 15px; cursor: pointer;
  list-style: none; position: relative; user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%);
  font-size: 22px; color: var(--led-dark); font-weight: 400;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item[open] { border-color: var(--led); box-shadow: 0 0 0 3px var(--led-soft); }
.faq-item p { padding: 0 20px 18px; color: var(--ink-soft); font-size: 14.5px; }

/* ============ LIÊN HỆ / FORM ============ */
.section-contact {
  background:
    radial-gradient(760px 380px at 8% 0%, rgba(31, 196, 236, 0.2), transparent 60%),
    radial-gradient(700px 420px at 100% 100%, rgba(255, 106, 0, 0.16), transparent 60%),
    var(--ink);
  color: #fff;
}
.contact-grid { display: grid; gap: 40px; }
.contact-info .eyebrow { color: #7be2fb; margin-bottom: 12px; }
.contact-info h2 { font-family: var(--display); font-size: clamp(27px, 4.2vw, 42px); font-weight: 800; line-height: 1.15; margin-bottom: 16px; }
.contact-info h2 .accent { color: var(--led); }
.contact-info > p { color: rgba(255, 255, 255, 0.8); margin-bottom: 22px; font-size: 15px; }
.contact-channels { display: grid; gap: 12px; margin-bottom: 22px; }
.contact-channels a {
  display: block; background: rgba(255, 255, 255, 0.07); border: 1px solid rgba(123, 226, 251, 0.25);
  padding: 13px 18px; border-radius: var(--radius-sm); font-size: 15px; transition: background 0.2s, border-color 0.2s;
}
.contact-channels a:hover { background: rgba(255, 255, 255, 0.14); border-color: rgba(123, 226, 251, 0.6); }
.contact-address { font-size: 14px; color: rgba(255, 255, 255, 0.72); line-height: 1.9; }

.lead-form { background: var(--paper); color: var(--ink); border-radius: 22px; padding: 32px 26px; box-shadow: var(--shadow-lg); }
.lead-form h3 { font-family: var(--display); font-size: 23px; font-weight: 800; margin-bottom: 4px; text-align: center; }
.lead-form .form-lead-sub { text-align: center; font-size: 13.5px; color: var(--ink-soft); margin-bottom: 20px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13.5px; font-weight: 700; margin-bottom: 6px; }
.form-group input, .form-group select {
  width: 100%; padding: 13px 14px; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  font-family: var(--body); font-size: 15px; transition: border-color 0.2s, box-shadow 0.2s;
  background: var(--paper); color: var(--ink);
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--led); box-shadow: 0 0 0 3px var(--led-soft);
}
.form-group input.error { border-color: #d5372c; }
.form-msg { margin-top: 14px; font-size: 14px; text-align: center; font-weight: 600; min-height: 20px; }
.form-msg.success { color: #0a8754; }
.form-msg.error { color: #d5372c; }
.form-privacy { margin-top: 10px; font-size: 12.5px; color: var(--ink-soft); text-align: center; }

/* ============ FOOTER ============ */
.site-footer { background: #070e1a; color: rgba(255, 255, 255, 0.7); padding: 48px 0 0; font-size: 14px; }
.footer-grid { display: grid; gap: 28px; padding-bottom: 34px; }
.site-footer .logo { color: #fff; margin-bottom: 12px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 10px; }
.site-footer a:hover { color: var(--led); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); padding: 18px; text-align: center; font-size: 13px; }

/* ============ NÚT NỔI ============ */
.float-buttons { position: fixed; right: 14px; bottom: 18px; z-index: 90; display: flex; flex-direction: column; gap: 12px; }
.float-btn {
  width: 54px; height: 54px; border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3); transition: transform 0.2s;
}
.float-btn:hover { transform: scale(1.1); }
.float-call { background: var(--cta); animation: pulse 1.8s infinite; }
.float-zalo { background: #0068ff; font-weight: 800; font-size: 14px; }
.float-messenger { background: linear-gradient(45deg, #0099ff, #a033ff, #ff5280); }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 106, 0, 0.55); }
  70% { box-shadow: 0 0 0 16px rgba(255, 106, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 106, 0, 0); }
}

/* ============ LIGHTBOX ============ */
.lightbox { position: fixed; inset: 0; z-index: 200; background: rgba(6, 12, 22, 0.95); display: flex; align-items: center; justify-content: center; }
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 92vw; max-height: 88vh; border-radius: 10px; object-fit: contain; }
.lightbox-close, .lightbox-nav {
  position: absolute; border: none; background: rgba(255, 255, 255, 0.12); color: #fff;
  cursor: pointer; z-index: 2; border-radius: 14px;
}
.lightbox-close { top: 16px; right: 16px; width: 44px; height: 44px; font-size: 19px; }
.lightbox-nav { top: 50%; transform: translateY(-50%); width: 48px; height: 48px; font-size: 30px; line-height: 1; }
.lightbox-nav:hover, .lightbox-close:hover { background: rgba(31, 196, 236, 0.4); }
.lightbox-prev { left: 12px; }
.lightbox-next { right: 12px; }

/* ============ SCROLL REVEAL ============ */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-reveal].revealed { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .hero h1 .hl::after { animation: none; }
  html { scroll-behavior: auto; }
}

/* ============ TABLET NHỎ ============ */
@media (min-width: 640px) and (max-width: 767px) {
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============ DESKTOP ============ */
@media (min-width: 768px) {
  .header-nav { display: flex; }
  .hero-bg { background-image: url("../assets/img/hero/hero-main.webp"); }
  .hero-inner { padding: 100px 18px 56px; }
  .hero-content { max-width: 640px; }
  .hero-cta { flex-direction: row; max-width: none; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
  .pain-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .benefit-zone { padding: 12px 28px 28px; }
  .benefit-cta { flex-direction: row; align-items: center; justify-content: space-between; padding: 34px 38px; }
  .benefit-cta p { max-width: 560px; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .benefit-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .gallery-grid { grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .sample-grid { grid-template-columns: repeat(4, 1fr); }
  .review-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1fr; align-items: start; gap: 56px; }
  .footer-grid { grid-template-columns: 2fr 1.5fr 1.5fr; }
  .section { padding: 110px 0 84px; }
}