/* ==========================================================================
   ColdOFF® / dptpu.com — design system
   Industrial + technical. Red #C8102E on ink #23262E and cream #F2F0E9.
   8 px spacing scale · 12 column grid · no rounded corners over 4 px.
   ========================================================================== */

/* ------------------------------------------------------------------ tokens */
:root {
  --red: #C8102E;
  --red-dark: #A50C25;
  --red-tint: #FBF2F3;
  --ink: #23262E;
  --ink-2: #3F434D;
  --ink-3: #4A4D57;
  --cream: #F2F0E9;
  --cream-2: #EDEAE1;
  --cream-3: #E4E0D4;
  --white: #FFFFFF;
  --brown: #7A2E0E;
  --amber: #F7B32B;
  --gray: #8A8878;
  --line: #DCD7C9;
  --line-soft: #E7E3D7;
  --wa: #25D366;
  --zalo: #0068FF;
  --maxw: 1200px;
  --gutter: 24px;
  --font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
          "Helvetica Neue", Arial, "Noto Sans", "Noto Sans Vietnamese",
          "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono: "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --shadow-lg: 0 32px 80px -48px rgba(35, 38, 46, .55);
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ------------------------------------------------------------------ base */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: clip;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-variant-ligatures: common-ligatures;
}

img, svg { max-width: 100%; }
img { height: auto; display: block; }

h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--red); }

ul, ol { padding-left: 1.1em; }

strong, b { font-weight: 600; color: var(--ink); }

::selection { background: var(--red); color: #fff; }

:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-radius: 2px;
}

[id] { scroll-margin-top: 96px; }

.ico { flex: none; display: inline-block; vertical-align: middle; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--ink); color: #fff; padding: 12px 20px; font-size: 14px;
}
.skip:focus { left: 16px; top: 16px; }

/* ------------------------------------------------------------------ layout */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section { padding: 96px 0; position: relative; }
.section--cream { background: var(--cream); }
.section--white { background: var(--white); }
.section--soft { background: var(--cream-2); }
.section--tight { padding: 64px 0; }

.section--ink {
  background: var(--ink);
  color: #DDD9CD;
}
.section--ink .h2, .section--ink h2, .section--ink h3 { color: var(--cream); }
.section--ink .lead { color: #B9B5A8; }

.section-head { margin-bottom: 48px; }
.grid { display: grid; gap: var(--gutter); }

/* ------------------------------------------------------------------ type */
.h1 {
  font-size: clamp(34px, 4.3vw, 56px);
  line-height: 1.1;
  letter-spacing: -.022em;
  font-weight: 600;
  color: var(--ink);
  max-width: 20ch;
  text-wrap: balance;
}

.h2 {
  font-size: clamp(26px, 3.1vw, 40px);
  line-height: 1.16;
  letter-spacing: -.018em;
  font-weight: 600;
  color: var(--ink);
  max-width: 26ch;
  text-wrap: balance;
}

.h3 {
  font-size: clamp(19px, 1.9vw, 24px);
  line-height: 1.3;
  letter-spacing: -.01em;
  font-weight: 600;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11.5px;
  line-height: 1.4;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--red);
  font-weight: 600;
  margin-bottom: 16px;
}
.kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--red);
  flex: none;
}

.sec-head { max-width: 780px; margin-bottom: 48px; }
.sec-head .lead { margin-top: 14px; }
.sec-head.is-center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head.is-center .kicker { justify-content: center; }
.sec-head.is-center .h2, .sec-head.is-center .lead { margin-left: auto; margin-right: auto; }

.lead {
  font-size: 17px;
  line-height: 1.72;
  color: var(--ink-3);
  max-width: 64ch;
}

.muted { color: var(--gray); }
.small { font-size: 13px; line-height: 1.6; }
.mono {
  font-family: var(--mono);
  font-size: .92em;
  letter-spacing: -.01em;
}

/* ------------------------------------------------------------------ buttons */
.btn {
  --btn-h: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: var(--btn-h);
  padding: 0 26px;
  border: 1.5px solid transparent;
  border-radius: 4px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.005em;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
  transition: background .22s var(--ease), color .22s var(--ease),
              border-color .22s var(--ease), transform .22s var(--ease),
              box-shadow .22s var(--ease);
}
.btn .ico { transition: transform .22s var(--ease); }
.btn:hover .ico { transform: translateX(3px); }

.btn--primary {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}
.btn--primary:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px -18px rgba(200, 16, 46, .9);
}

.btn--ghost {
  background: transparent;
  color: var(--red);
  border-color: var(--red);
}
.btn--ghost:hover {
  background: rgba(200, 16, 46, .06);
  color: var(--red-dark);
}

.btn--light {
  background: var(--cream);
  color: var(--ink);
  border-color: var(--cream);
}
.btn--light:hover { background: #fff; color: var(--ink); }

.btn--lg { --btn-h: 54px; padding: 0 32px; font-size: 16px; }
.btn--sm { --btn-h: 40px; padding: 0 18px; font-size: 13.5px; }
.btn--block { width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.link-arrow:hover { color: var(--red); border-color: var(--red); }
.link-arrow .ico { transition: transform .2s var(--ease); }
.link-arrow:hover .ico { transform: translateX(3px); }

/* ------------------------------------------------------------------ header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(242, 240, 233, .94);
  border-bottom: 1px solid rgba(35, 38, 46, .1);
  backdrop-filter: saturate(140%) blur(10px);
  transition: box-shadow .3s var(--ease);
}
.site-header.is-scrolled { box-shadow: 0 10px 30px -24px rgba(35, 38, 46, .6); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 13px;
  height: 13px;
  background: var(--red);
  position: relative;
  flex: none;
}
.brand-mark::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 5px;
  height: 5px;
  background: var(--cream);
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1;
}
.brand-name sup { font-size: 9px; vertical-align: super; top: -.2em; }
.brand-sub {
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--gray);
  border-left: 1px solid var(--line);
  padding-left: 10px;
  line-height: 1;
  font-weight: 500;
  text-transform: uppercase;
}

.nav { margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.nav-item { position: relative; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  position: relative;
  transition: color .2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav-link:hover, .nav-item.is-active > .nav-link, .nav-link[aria-current] { color: var(--ink); }
.nav-link:hover::after, .nav-item.is-active > .nav-link::after,
.nav-link[aria-current]::after { transform: scaleX(1); }

.caret {
  width: 7px;
  height: 7px;
  border-right: 1.4px solid currentColor;
  border-bottom: 1.4px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  display: inline-block;
  opacity: .65;
  transition: transform .2s var(--ease);
}

.menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 236px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s;
  z-index: 90;
}
.menu ul { list-style: none; padding: 0; margin: 0; }
.menu a {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--ink-2);
  border-left: 2px solid transparent;
}
.menu a:hover {
  background: var(--cream);
  color: var(--ink);
  border-left-color: var(--red);
}
.has-menu:hover > .menu,
.has-menu:focus-within > .menu,
.has-menu.is-open > .menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.menu-toggle { display: none; }

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: none;
  margin-left: auto;
}

.lang-list {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 0;
}
.lang-list li + li { border-left: 1px solid var(--line); }
.lang-list a {
  display: block;
  padding: 6px 9px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--gray);
  line-height: 1;
}
.lang-list a:hover { color: var(--ink); }
.lang-list a[aria-current="true"] { color: var(--red); }
.lang-list--drawer { display: none; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 4px;
  padding: 0;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1.6px;
  background: var(--ink);
  transition: transform .25s var(--ease), opacity .2s;
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 27px; }
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-drawer-foot { display: none; }

/* ------------------------------------------------------------------ hero */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--cream);
  padding-top: 56px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(35, 38, 46, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(35, 38, 46, .05) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 20%, #000 0%, transparent 75%);
  mask-image: radial-gradient(120% 90% at 70% 20%, #000 0%, transparent 75%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 56px;
  align-items: center;
  padding-bottom: 56px;
}
.hero-copy { max-width: 620px; }
.hero-media { max-width: 520px; margin-left: auto; }
.hero-sub {
  font-size: 17px;
  line-height: 1.72;
  color: var(--ink-2);
  margin: 24px 0 32px;
  max-width: 56ch;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-media { position: relative; }
.hero-art {
  margin: 0;
  border: 1px solid rgba(35, 38, 46, .16);
  background: #FBFAF5;
  box-shadow: 0 30px 70px -50px rgba(35, 38, 46, .8);
}
.hero-art .art { display: block; width: 100%; height: auto; }
.hero-corner {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  align-items: flex-start;
  margin-top: 14px;
  font-size: 11.5px;
  line-height: 1.45;
  color: #5A5D66;
  text-align: right;
}
.sq {
  width: 6px;
  height: 6px;
  background: var(--red);
  flex: none;
  margin-top: 5px;
  display: inline-block;
}

.trustbar {
  position: relative;
  background: var(--cream-2);
  border-top: 1px solid rgba(35, 38, 46, .13);
}
.trustbar ul {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  list-style: none;
  padding: 15px 0;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--ink-2);
}
.trustbar li { display: flex; align-items: center; gap: 0; }
.trustbar li + li::before {
  content: "";
  width: 1px;
  height: 13px;
  background: rgba(35, 38, 46, .22);
  margin-right: 24px;
  flex: none;
}
.trustbar b { font-weight: 600; color: var(--ink); margin-right: 4px; }

/* ------------------------------------------------------------------ page hero */
.page-hero {
  background: var(--cream);
  padding: 40px 0 72px;
  border-bottom: 1px solid rgba(35, 38, 46, .1);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(35, 38, 46, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(35, 38, 46, .045) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(90% 100% at 80% 0%, #000, transparent 70%);
  mask-image: radial-gradient(90% 100% at 80% 0%, #000, transparent 70%);
}
.page-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 48px;
  align-items: center;
  margin-top: 28px;
}
.page-hero:not(.has-art) .page-hero-grid { grid-template-columns: 1fr; }
.page-hero:not(.has-art) .page-hero-copy { max-width: 860px; }
.page-hero:not(.has-art) .h1 { max-width: 24ch; }
.page-hero:not(.has-art) .lead { max-width: 64ch; }
.page-hero-copy .lead { margin-top: 20px; }
.page-art { margin: 0; }
.page-art .art { width: 100%; height: auto; display: block; }

.breadcrumb { font-size: 12px; color: var(--gray); }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.breadcrumb li { display: flex; align-items: center; gap: 6px; }
.breadcrumb li + li::before { content: "/"; color: var(--line); }
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--red); }
.breadcrumb [aria-current] { color: var(--ink-2); }

.page-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
}
.page-meta li {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink-2);
  padding: 0 16px;
  border-left: 1px solid var(--line);
}
.page-meta li:first-child { padding-left: 0; border-left: 0; }
.page-meta li:first-child::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--red);
  margin-right: 8px;
  vertical-align: 1px;
}

/* ------------------------------------------------------------------ cards */
.cards { display: grid; gap: var(--gutter); }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 30px 24px 26px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease),
              border-color .3s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--red);
  transform: scaleX(1);
  transform-origin: left;
  transition: background .3s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: #C9C3B2;
  box-shadow: 0 24px 50px -38px rgba(35, 38, 46, .9);
}
.card:hover::before { background: var(--red-dark); }

.card-num {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--red);
  font-family: var(--mono);
}
.card-ico { color: var(--brown); margin-bottom: 2px; }
.card-title {
  font-size: 20px;
  line-height: 1.32;
  letter-spacing: -.012em;
  font-weight: 600;
}
.card-body { font-size: 15px; line-height: 1.62; color: var(--ink-3); }
.card-link {
  margin-top: auto;
  padding-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
}
.card-link:hover { color: var(--red); }
.card-link .ico { transition: transform .2s var(--ease); }
.card-link:hover .ico { transform: translateX(3px); }

.card--ghost { background: transparent; border-style: dashed; }
.card--ghost::before { display: none; }

.section--ink .card {
  background: #2B2F38;
  border-color: rgba(242, 240, 233, .13);
  color: #D9D5C9;
}
.section--ink .card:hover { border-color: rgba(242, 240, 233, .25); }
.section--ink .card-title { color: var(--cream); }
.section--ink .card-body { color: #B0AC9F; }
.section--ink .card-link { color: var(--cream); }

/* ------------------------------------------------------------------ process */
.process { margin: 0; }
.process-track {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch;
  list-style: none;
  padding: 0;
  margin: 0;
}
.process-step {
  padding: 34px 30px;
  background: var(--white);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.process-step.is-last {
  background: var(--ink);
  border-color: var(--ink);
  color: #C9C5B9;
}
.process-who {
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--red);
}
.process-step.is-last .process-who { color: var(--amber); }
.process-title {
  font-size: clamp(20px, 1.9vw, 24px);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -.012em;
}
.process-step.is-last .process-title { color: var(--cream); }
.process-body { font-size: 14.5px; line-height: 1.6; color: var(--ink-3); }
.process-step.is-last .process-body { color: #B0AC9F; }
.process-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  color: var(--gray);
}
.process-quote {
  text-align: center;
  font-size: clamp(19px, 2.1vw, 24px);
  font-weight: 600;
  letter-spacing: -.015em;
  margin-top: 32px;
  color: var(--ink);
}

/* ------------------------------------------------------------------ tables */
.table-wrap {
  border: 1px solid var(--line);
  background: var(--white);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.ptable, .ctable {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 560px;
}
.ptable caption, .ctable caption {
  text-align: left;
  padding: 16px 18px 0;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gray);
  font-weight: 600;
}
.ptable thead th, .ctable thead th {
  background: var(--ink);
  color: #E8E4D8;
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  font-weight: 600;
  text-align: left;
  padding: 14px 18px;
  vertical-align: bottom;
  border-right: 1px solid rgba(242, 240, 233, .12);
}
.ptable thead th:last-child, .ctable thead th:last-child { border-right: 0; }

.ptable tbody th, .ctable tbody th {
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  background: var(--cream-2);
  padding: 13px 18px;
  width: 34%;
  border-top: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
  vertical-align: top;
}
.ptable tbody td, .ctable tbody td {
  padding: 13px 18px;
  border-top: 1px solid var(--line-soft);
  vertical-align: top;
  color: var(--ink-2);
}
.ptable tbody tr:nth-child(even) td, .ctable tbody tr:nth-child(even) td { background: #FAF9F4; }
.ptable tbody td:first-of-type { font-weight: 600; color: var(--ink); }

.ctable thead th.is-ours { background: var(--red); color: #fff; }
.ctable tbody td.is-ours, .ctable tbody th.is-ours {
  background: var(--red-tint);
  font-weight: 500;
  color: var(--ink);
}
.ctable tbody tr:nth-child(even) td.is-ours { background: #F9EDEF; }
.ctable thead th.corner { background: var(--ink); }

.ptable--steps tbody th:first-child,
.ptable--steps thead th:first-child {
  width: 58px;
  white-space: nowrap;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--red);
}
.ptable--steps tbody td:first-of-type { font-weight: 600; }

.table-note {
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--gray);
  margin-top: 10px;
  max-width: 68ch;
}

/* ------------------------------------------------------------------ faq */
.faq { border-top: 1px solid var(--line); max-width: 940px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  transition: color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--red); }
.faq-mark {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
  margin-top: 6px;
}
.faq-mark::before, .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--red);
  transition: transform .25s var(--ease), opacity .2s;
}
.faq-mark::before { left: 0; right: 0; top: 6px; height: 1.6px; }
.faq-mark::after { top: 0; bottom: 0; left: 6px; width: 1.6px; }
.faq-item[open] .faq-mark::after { transform: rotate(90deg); opacity: 0; }
.faq-a { padding: 0 40px 22px 0; }
.faq-a p { font-size: 15.5px; line-height: 1.72; color: var(--ink-3); max-width: 78ch; }
.faq-a p + p { margin-top: 10px; }
.faq-group {
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gray);
  font-weight: 600;
  padding: 34px 0 6px;
}
.faq-group:first-child { padding-top: 0; }

/* ------------------------------------------------------------------ cta band */
.cta-band { background: var(--ink); color: var(--cream); padding: 56px 0; }
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-copy { max-width: 620px; }
.cta-kicker {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber);
  font-weight: 600;
  margin-bottom: 10px;
}
.cta-claim {
  font-size: clamp(20px, 2.3vw, 27px);
  line-height: 1.32;
  font-weight: 600;
  letter-spacing: -.015em;
  color: var(--cream);
}

/* ------------------------------------------------------------------ form */
.section--form { background: var(--cream); }
.form-wrap {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.form-head .h2 { font-size: clamp(24px, 2.6vw, 32px); }
.form-lead { font-size: 15.5px; line-height: 1.65; color: var(--ink-3); margin-top: 14px; }
.form-assure {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: grid;
  gap: 10px;
}
.form-assure li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-2);
}
.form-assure li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--red);
}

.lead-form {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 32px;
  display: grid;
  gap: 18px;
  box-shadow: 0 30px 60px -50px rgba(35, 38, 46, .8);
}
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 16px; }
.field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.field--full { grid-column: 1 / -1; }
.field label, .field legend {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding: 0;
}
.field legend { margin-bottom: 9px; }
.field .opt {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--gray);
}

input[type="text"], input[type="tel"], input[type="email"], select, textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
textarea { min-height: 96px; resize: vertical; line-height: 1.55; }
select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5l5-5' fill='none' stroke='%238A8878' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 11px;
  padding-right: 38px;
}
input::placeholder, textarea::placeholder { color: #A8A597; }

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--red);
  box-shadow: inset 0 0 0 1px var(--red);
}
.field.is-invalid input, .field.is-invalid select {
  border-color: #B3261E;
  background: #FDF6F5;
}
.field-error {
  font-size: 12px;
  color: #B3261E;
  margin: 0;
}

.radio-row { display: flex; flex-wrap: wrap; gap: 8px; }
.radio-pill { position: relative; display: inline-flex; cursor: pointer; }
.radio-pill input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}
.radio-pill span {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 14px;
  color: var(--ink-2);
  background: var(--white);
  transition: all .2s var(--ease);
}
.radio-pill:hover span { border-color: #C9C3B2; }
.radio-pill input:checked + span {
  border-color: var(--red);
  background: var(--red-tint);
  color: var(--red);
  font-weight: 600;
}
.radio-pill input:focus-visible + span {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.form-note { font-size: 11.5px; line-height: 1.55; color: var(--gray); }
.form-status { font-size: 14px; font-weight: 500; min-height: 20px; }
.form-status.is-ok { color: #1C6B3A; }
.form-status.is-err { color: #B3261E; }
.form-status a { text-decoration: underline; }

/* ------------------------------------------------------------------ footer */
.site-footer {
  background: #1E2128;
  color: #B9B5A8;
  padding-top: 64px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.15fr;
  gap: 40px;
  padding-bottom: 48px;
}
.brand--light { color: var(--cream); }
.brand--light:hover { color: var(--cream); }
.brand--light .brand-mark::after { background: #1E2128; }
.footer-company { margin-top: 16px; font-size: 13.5px; color: #9C9890; }
.footer-statement {
  margin-top: 16px;
  border-left: 2px solid var(--red);
  padding-left: 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: #8E8A80;
  max-width: 34ch;
}
.footer-title {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #807D72;
  font-weight: 600;
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.footer-col a { color: #C2BEB1; font-size: 13.5px; }
.footer-col a:hover { color: var(--cream); }
.footer-addr { margin-top: 16px; font-size: 12.5px; color: #8E8A80; }
.footer-col ul.footer-langs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 14px;
  padding: 0;
  list-style: none;
}
.footer-langs li + li { border-left: 1px solid rgba(242, 240, 233, .15); }
.footer-langs a {
  display: block;
  padding: 0 8px;
  font-size: 11.5px;
  color: #8E8A80;
  letter-spacing: .04em;
}
.footer-langs li:first-child a { padding-left: 0; }
.footer-langs a:hover { color: var(--cream); }
.footer-langs a[aria-current="true"] { color: var(--amber); }

.footer-bottom {
  border-top: 1px solid rgba(242, 240, 233, .12);
  padding: 20px 0 30px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: #807D72;
}
.footer-bottom a { color: #9C9890; }
.footer-bottom a:hover { color: var(--cream); }
.footer-legal { display: flex; gap: 8px; align-items: center; }
.sep { color: #4A4D57; margin: 0 4px; }

/* ------------------------------------------------------------------ im */
.im-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 70;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.im-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 12px 26px -12px rgba(35, 38, 46, .7);
  transition: transform .2s var(--ease);
}
.im-btn:hover { color: #fff; transform: translateY(-2px) scale(1.04); }
.im-btn--wa { background: var(--wa); }
.im-btn--zalo { background: var(--zalo); }

.mobile-bar { display: none; }

/* ------------------------------------------------------------------ prose & blocks */
.prose { max-width: 780px; }
.prose > * + * { margin-top: 16px; }
.prose p { font-size: 16.5px; line-height: 1.75; color: var(--ink-2); }
.prose .h3 { margin-top: 44px; margin-bottom: 12px; color: var(--ink); }
.prose .h3:first-child { margin-top: 0; }
.prose ul, .prose ol { padding-left: 0; list-style: none; display: grid; gap: 10px; }
.prose ul li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-2);
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 1.5px;
  background: var(--red);
}
.prose ol { counter-reset: item; }
.prose ol li {
  position: relative;
  padding-left: 32px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-2);
  counter-increment: item;
}
.prose ol li::before {
  content: counter(item, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--red);
  font-weight: 600;
}
.prose .table-wrap { margin-top: 22px; }
.prose .inline-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
  border-left: 2px solid var(--line);
  padding-left: 14px;
}

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.split p { font-size: 16px; line-height: 1.72; color: var(--ink-2); }
.split p + p { margin-top: 14px; }

.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.duo-col { background: var(--white); padding: 32px 28px; }
.duo-col.is-muted { background: var(--cream-2); }
.duo-title { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--brown); margin-bottom: 16px; }
.duo-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.duo-col li { display: flex; gap: 10px; font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.duo-col li .ico { color: var(--red); margin-top: 2px; }
.duo-col.is-muted li .ico { color: var(--gray); }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  list-style: none;
  padding: 0;
  margin: 0;
}
.stats li {
  background: var(--white);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat-value {
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 600;
  letter-spacing: -.025em;
  line-height: 1.1;
  color: var(--ink);
}
.stats li:nth-child(2) .stat-value { color: var(--red); }
.stat-label {
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray);
  font-weight: 600;
}
.stat-note { font-size: 12.5px; line-height: 1.5; color: var(--ink-3); }

.flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: step;
}
.flow-step {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid var(--line);
}
.flow-step::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 26px;
  height: 2px;
  background: var(--red);
}
.flow-n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--red);
  font-weight: 600;
  letter-spacing: .08em;
}
.flow-title { font-size: 16px; font-weight: 600; margin: 8px 0 6px; line-height: 1.35; }
.flow-body { font-size: 13.5px; line-height: 1.55; color: var(--ink-3); }

.callout {
  background: var(--cream-2);
  border-left: 3px solid var(--red);
  padding: 24px 26px;
  margin-top: 32px;
}
.callout h3 { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--brown); margin-bottom: 8px; }
.callout p { font-size: 15px; line-height: 1.65; color: var(--ink-2); }
.callout--warn { border-left-color: var(--amber); }

.pill-row { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.pill {
  display: inline-flex;
  align-items: center;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: var(--cream-2);
  border: 1px solid var(--line);
  padding: 5px 10px;
  line-height: 1.3;
}
.card .pill { margin-top: 4px; align-self: flex-start; }

.pullquote {
  border-left: 3px solid var(--red);
  padding: 6px 0 6px 24px;
  margin: 40px 0;
  max-width: 760px;
}
.pullquote p {
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.45;
  font-weight: 500;
  letter-spacing: -.012em;
  color: var(--ink);
}
.pullquote cite { display: block; margin-top: 12px; font-size: 12.5px; font-style: normal; color: var(--gray); }

.link-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.link-card {
  background: var(--white);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--ink);
  transition: background .2s var(--ease);
}
.link-card:hover { background: var(--cream); color: var(--ink); }
.link-card .ico { color: var(--red); }
.link-card-title { font-size: 17px; font-weight: 600; line-height: 1.35; }
.link-card-body { font-size: 14px; line-height: 1.55; color: var(--ink-3); }
.link-card > .ico:last-child { margin-top: auto; color: var(--gray); align-self: flex-end; }

.figure { margin: 0; }
.figure .art { width: 100%; height: auto; display: block; background: #FBFAF5; border: 1px solid var(--line); }
.figure figcaption { font-size: 12px; color: var(--gray); margin-top: 10px; }

.toc {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 22px 24px;
}
.toc > p {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray);
  font-weight: 600;
  margin-bottom: 12px;
}
.toc ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; counter-reset: toc; }
.toc li { counter-increment: toc; }
.toc a {
  display: flex;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.4;
}
.toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--red);
  padding-top: 3px;
}
.toc a:hover { color: var(--red); }

/* ------------------------------------------------------------------ utilities */
.mt-0 { margin-top: 0; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-40 { margin-top: 40px; }
.mt-48 { margin-top: 48px; }
.mt-64 { margin-top: 64px; }
.mb-24 { margin-bottom: 24px; }
.center { text-align: center; }
.stack-24 > * + * { margin-top: 24px; }
.stack-40 > * + * { margin-top: 40px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.two-col--wide { grid-template-columns: 1.25fr .75fr; }
.side { position: sticky; top: 96px; }

/* ------------------------------------------------------------------ motion */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}
.js .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover, .im-btn:hover { transform: none; }
}

/* ------------------------------------------------------------------ responsive */
@media (max-width: 1180px) {
  .nav-link { padding: 10px 9px; font-size: 13.5px; }
  .header-right { gap: 12px; }
}

@media (max-width: 1024px) {
  :root { --gutter: 20px; }

  .nav-toggle { display: block; }
  .header-cta { display: none; }
  .header-right .lang-list { display: none; }
  .brand-sub { display: none; }

  .nav {
    position: fixed;
    inset: 72px 0 0;
    background: var(--cream);
    border-top: 1px solid var(--line);
    padding: 16px 20px 120px;
    overflow-y: auto;
    transform: translateX(101%);
    transition: transform .32s var(--ease);
    margin-left: 0;
    z-index: 79;
  }
  body.nav-open .nav { transform: none; }
  body.nav-open { overflow: hidden; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-bottom: 1px solid var(--line); }
  .nav-link {
    display: flex;
    justify-content: space-between;
    padding: 18px 4px;
    font-size: 17px;
    font-weight: 600;
  }
  .nav-link::after { display: none; }
  .nav-link .caret { display: none; }

  .menu-toggle {
    display: grid;
    place-items: center;
    position: absolute;
    top: 6px;
    right: 0;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    color: var(--ink);
  }
  .menu-toggle .caret { transform: rotate(45deg); transition: transform .25s var(--ease); }
  .nav-item.is-open .menu-toggle .caret { transform: rotate(225deg); }

  .menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 0;
    background: transparent;
    padding: 0 0 8px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s var(--ease);
  }
  .has-menu:hover > .menu { max-height: 0; }
  .nav-item.is-open > .menu { max-height: 520px; }
  .menu a { padding: 12px 4px; font-size: 15px; border-left: 0; border-bottom: 1px solid rgba(35, 38, 46, .06); }

  .nav-drawer-foot {
    display: block;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
  }
  .lang-list--drawer { display: flex; margin-bottom: 16px; }
  .lang-list--drawer a { font-size: 14px; padding: 8px 12px; }

  .hero { padding-top: 32px; }
  .hero-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 36px; }
  .hero-copy { max-width: none; }
  .hero-media { margin-top: 4px; max-width: 420px; }
  .hero-corner {
    position: static;
    max-width: none;
    margin-top: 12px;
    background: transparent;
    border-left: 2px solid var(--red);
    padding: 4px 0 4px 10px;
  }
  .page-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .page-hero { padding-bottom: 48px; }

  .cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 20px; }
  .link-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .two-col, .two-col--wide { grid-template-columns: 1fr; gap: 32px; }
  .side { position: static; }
  .form-wrap { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .section { padding: 72px 0; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 56px 0; }
  .section--tight { padding: 44px 0; }
  .sec-head { margin-bottom: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .header-inner { height: 64px; }
  .nav { inset: 64px 0 0; }

  .trustbar ul { flex-wrap: wrap; gap: 8px 18px; padding: 13px 0; justify-content: flex-start; }
  .trustbar li + li::before { margin-right: 18px; }

  .cards, .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr; }
  .link-grid { grid-template-columns: 1fr; }
  .split, .duo { grid-template-columns: 1fr; }
  .duo { gap: 1px; }
  .form-grid { grid-template-columns: 1fr; }
  .lead-form { padding: 22px; }
  .process-track { grid-template-columns: 1fr; }
  .process-arrow {
    width: auto;
    height: 40px;
    transform: rotate(90deg);
    justify-content: flex-start;
    padding-left: 26px;
  }
  .process-step { padding: 26px 22px; }
  .process-quote { text-align: left; font-size: 19px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 32px; }
  .footer-bottom { flex-direction: column; }
  .page-meta { margin-top: 20px; }
  .page-meta li { font-size: 12px; padding: 0 10px; }

  .im-float { display: none; }
  body { padding-bottom: 68px; }
  .mobile-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 78;
    display: flex;
    gap: 8px;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
    background: rgba(242, 240, 233, .97);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(8px);
  }
  .mobile-bar .btn { flex: 1 1 0; min-width: 0; --btn-h: 46px; padding: 0 10px; font-size: 13px; }
  .mobile-bar .btn .ico { display: none; }

  .cta-inner { flex-direction: column; align-items: flex-start; }
  .cta-band { padding: 40px 0; }
  .pullquote { margin: 28px 0; }
  .section--ink .cards { gap: 12px; }
}

/* ------------------------------------------------------------------ print */
@media print {
  .site-header, .site-footer, .im-float, .mobile-bar, .cta-band,
  .section--form, .breadcrumb, .toc, .skip { display: none !important; }
  body { background: #fff; font-size: 10.5pt; color: #000; }
  .section, .page-hero { padding: 0; }
  .wrap { max-width: none; padding: 0; }
  a { color: #000; }
  .table-wrap { border-color: #999; }
  .ptable thead th, .ctable thead th { background: #23262E !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}






/* ------------------------------------------------------------------ datasheet */
@page { size: A4; margin: 13mm 12mm 14mm; }

.ds { max-width: none; color: #1c1f26; }
.ds-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16mm;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 8pt;
  margin-bottom: 12pt;
}
.ds-title { font-size: 17pt; line-height: 1.16; letter-spacing: -.01em; margin: 4pt 0 6pt; }
.ds-sub { font-size: 8.2pt; line-height: 1.5; color: #4a4d57; max-width: 108mm; }
.ds-meta { font-size: 7.8pt; line-height: 1.65; color: #3f434d; text-align: right; white-space: nowrap; }
.ds .kicker { font-size: 7pt; margin-bottom: 4pt; }
.ds-h2 { font-size: 10.5pt; margin: 12pt 0 5pt; letter-spacing: -.01em; }
.ds .ptable { font-size: 7.4pt; min-width: 0; }
.ds .ptable thead th { font-size: 6.4pt; padding: 3.4pt 4.5pt; }
.ds .ptable tbody th, .ds .ptable tbody td { padding: 3.2pt 4.5pt; }
.ds .table-wrap { border-color: #b9b4a5; }
.ds .ptable--steps tbody th:first-child,
.ptable--steps thead th:first-child {
  width: 58px;
  white-space: nowrap;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--red);
}
.ptable--steps tbody td:first-of-type { font-weight: 600; }

.table-note { font-size: 6.6pt; margin-top: 4pt; }
.ds-list { font-size: 8pt; line-height: 1.55; padding-left: 12pt; margin-top: 4pt; }
.ds-list li { margin-bottom: 2.5pt; }
.ds-foot {
  margin-top: 14pt;
  border-top: 1px solid #b9b4a5;
  padding-top: 5pt;
  font-size: 6.8pt;
  color: #6b6a60;
  letter-spacing: .02em;
}

@media print {
  .page-hero, .cta-band { display: none !important; }
}
/* ------------------------------------------------------------------ datasheet page (screen) */
.page-datasheet .site-header,
.page-datasheet .site-footer,
.page-datasheet .im-float,
.page-datasheet .mobile-bar { display: none; }
.page-datasheet main { padding: 40px 0 56px; }
.page-datasheet .reveal { opacity: 1; transform: none; }
.page-datasheet .wrap { max-width: 920px; }
.page-datasheet .ptable { font-size: 12.5px; }
.page-datasheet .ptable tbody th { font-size: 12px; }


/* ------------------------------------------------------------------ page-specific blocks */
/* symptom grid (application pages) */
.sym-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  list-style: none;
  padding: 0;
  margin: 0;
}
.sym-grid li {
  background: var(--white);
  padding: 28px 24px 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sym-n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--red);
}
.sym-grid p { font-size: 15.5px; line-height: 1.6; color: var(--ink-2); }

/* whitepaper chapter list */
.chapter-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 0; }
.chapter-list li {
  display: flex;
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.chapter-list li:last-child { border-bottom: 1px solid var(--line); }
.ch-n { font-family: var(--mono); font-size: 12px; color: var(--red); padding-top: 4px; }
.chapter-list h3 { font-size: 16.5px; font-weight: 600; line-height: 1.4; }
.chapter-list p { font-size: 14px; line-height: 1.55; color: var(--ink-3); margin-top: 4px; }

/* download cards */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.dl-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 22px 20px 20px;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}
.dl-card:hover { border-color: var(--red); transform: translateY(-2px); color: var(--ink); }
.dl-lang {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--red);
}
.dl-name { font-size: 14.5px; font-weight: 600; line-height: 1.4; }
.dl-meta { font-size: 11.5px; color: var(--gray); }
.dl-card .ico { position: absolute; right: 16px; bottom: 16px; color: var(--ink); }

/* contact channels */
.chan-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.chan {
  background: var(--white);
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 24px 22px 26px;
  color: var(--ink);
  transition: background .2s var(--ease);
}
.chan:hover { background: var(--cream); color: var(--ink); }
.chan-ico { color: var(--red); }
.chan-name { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--gray); margin-top: 8px; }
.chan-value { font-size: 15.5px; font-weight: 600; }

.contact-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
  margin-top: 56px;
}
.contact-block h3 {
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 8px;
}
.contact-block p { font-size: 14.5px; line-height: 1.6; color: var(--ink-2); }
.contact-lines { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.contact-lines li { display: flex; gap: 16px; font-size: 15px; }
.contact-lines b { min-width: 96px; font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--gray); padding-top: 3px; }

/* legal */
.legal { max-width: 780px; }
.legal h3 { margin-top: 40px; }
.legal p { font-size: 16px; line-height: 1.75; color: var(--ink-2); margin-top: 12px; }

/* 404 */
.nf { padding: 48px 0 24px; max-width: 760px; }
.nf .h1 { max-width: 18ch; }

/* wide figure */
.figure--wide .art { border: 1px solid var(--line); background: #FBFAF5; }

@media (max-width: 1024px) {
  .dl-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chan-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-facts { grid-template-columns: 1fr; gap: 24px; margin-top: 40px; }
  .sym-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .dl-grid { grid-template-columns: 1fr; }
  .chan-grid { grid-template-columns: 1fr 1fr; }
}


/* ------------------------------------------------------------------ CJK tuning */
[lang|="zh"] .h1 { line-height: 1.22; letter-spacing: -.01em; max-width: 13em; }
[lang|="zh"] .h2 { max-width: 22em; line-height: 1.32; text-wrap: wrap; }
[lang|="zh"] .lead, [lang|="zh"] .hero-sub { max-width: 33em; line-height: 1.9; }
[lang|="zh"] .card-title, [lang|="zh"] .process-title { line-height: 1.45; }
[lang|="zh"] .card-body, [lang|="zh"] .prose p { line-height: 1.85; }
[lang|="zh"] .cta-claim { max-width: 20em; line-height: 1.5; }
[lang|="zh"] .faq-item summary { line-height: 1.6; }
[lang|="zh"] .btn { letter-spacing: 0; }