/* ====================================================================
   SAGITTARIUS TECHNOLOGY — Engineering & R&D Studio
   Visual language: editorial + terminal. Serif display + mono body.
   Palette: near-black ground, lime electric, amber signal, off-white.
   Layout language: left sidebar rail, large numbered indices,
   horizontal marquee, code-block timeline, accordion industries.
   ==================================================================== */

:root {
  --ink: #0a0b08;
  --ink-2: #14160f;
  --ink-3: #1d2017;
  --paper: #ecead8;
  --paper-2: #d8d6c2;
  --paper-3: #a8a698;
  --muted: #6b6a5e;
  --line: rgba(236, 234, 216, 0.10);
  --line-strong: rgba(236, 234, 216, 0.22);

  --lime: #c8ff3a;
  --lime-dim: #8db829;
  --amber: #ff7a1a;
  --amber-dim: #b85416;
  --crimson: #d94d3a;

  --font-display: 'Fraunces', 'Times New Roman', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'Menlo', monospace;
  --font-body: 'Inter', 'Noto Sans HK', system-ui, sans-serif;

  --rail-w: 84px;
  --content-max: 1240px;
  --section-y: 120px;
  --r: 4px;

  --ease: cubic-bezier(0.65, 0, 0.35, 1);
  --t: 0.35s var(--ease);
}

/* ---- Reset & base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  padding-left: var(--rail-w);
}
img, svg { display: block; max-width: 100%; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; transition: color var(--t); }
a:hover { color: var(--lime); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: normal;
  color: var(--paper);
  letter-spacing: -0.02em;
  line-height: 1.05;
}
h1 { font-size: clamp(2.6rem, 7vw, 5.6rem); font-weight: 300; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); font-weight: 400; }
h3 { font-size: 1.15rem; font-weight: 500; letter-spacing: -0.01em; }

p { color: var(--paper-3); margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 40px;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--ink-3); }
::-webkit-scrollbar-thumb:hover { background: var(--lime-dim); }

/* ============================================================
   SIDE RAIL — vertical navigation
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  background: var(--ink);
  border-right: 1px solid var(--line);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 0;
}
.header-inner {
  display: contents;
}
.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--paper);
  text-align: center;
  padding: 0 6px;
}
.brand-logo {
  width: 36px; height: 36px;
  flex-shrink: 0;
}
.brand-logo svg { width: 100%; height: 100%; }
.brand-text {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-top: 16px;
  white-space: nowrap;
}
.brand-text .brand-zh {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--paper);
}
.brand-text .brand-en {
  display: inline-block;
  margin-top: 14px;
  color: var(--lime);
}

.nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 12px 0;
}
.nav a {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  padding: 14px 0;
  border-left: 2px solid transparent;
  text-align: center;
  width: 100%;
  transition: all var(--t);
}
.nav a:hover {
  color: var(--paper);
  border-left-color: var(--lime);
  background: var(--ink-2);
}
.nav a.active {
  color: var(--lime);
  border-left-color: var(--lime);
}

.header-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding-top: 12px;
}
.lang-switch {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.lang-switch button {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--paper-3);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: 6px 8px;
  cursor: pointer;
  width: 36px;
  transition: all var(--t);
}
.lang-switch button.active {
  background: var(--lime);
  color: var(--ink);
  border-color: var(--lime);
}
.lang-switch button:hover:not(.active) { color: var(--paper); border-color: var(--paper-3); }

.header-actions .btn { display: none; }
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  width: 40px; height: 40px;
  cursor: pointer;
  position: relative;
  align-items: center; justify-content: center;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block; width: 18px; height: 2px; background: var(--paper); position: absolute;
}
.menu-toggle span { position: relative; }
.menu-toggle span::before { content: ''; top: -6px; left: 0; }
.menu-toggle span::after { content: ''; top: 6px; left: 0; }
.menu-toggle.open span { background: transparent; }
.menu-toggle.open span::before { top: 0; transform: rotate(45deg); background: var(--lime); }
.menu-toggle.open span::after { top: 0; transform: rotate(-45deg); background: var(--lime); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--paper);
  background: transparent;
  color: var(--paper);
  cursor: pointer;
  border-radius: 0;
  transition: all var(--t);
  position: relative;
}
.btn::after {
  content: '↗';
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0;
  transition: transform var(--t);
}
.btn:hover::after { transform: translate(3px, -3px); }
.btn-violet, .btn-primary {
  background: var(--lime);
  color: var(--ink);
  border-color: var(--lime);
}
.btn-violet:hover, .btn-primary:hover {
  background: transparent;
  color: var(--lime);
  border-color: var(--lime);
}
.btn-outline:hover {
  color: var(--lime);
  border-color: var(--lime);
}
.btn-cyan, .btn-gold {
  background: var(--amber);
  color: var(--ink);
  border-color: var(--amber);
}
.btn-cyan:hover, .btn-gold:hover {
  background: transparent;
  color: var(--amber);
  border-color: var(--amber);
}

/* ============================================================
   HERO — Editorial typographic, no stats row
   ============================================================ */
.hero {
  min-height: 100vh;
  position: relative;
  padding: 110px 0 80px;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 1000px 600px at 110% 110%, rgba(255, 122, 26, 0.10), transparent 60%),
    radial-gradient(ellipse 800px 600px at -10% -10%, rgba(200, 255, 58, 0.08), transparent 60%);
  pointer-events: none;
}
.hero-bg, .hero-grid-overlay, .hero-float { display: none; }

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
}
.hero-tag, .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 48px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
}
.hero-tag::before, .hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 48px;
  height: 1px;
  background: var(--lime);
}
.hero-tag .dot { display: none; }

.hero h1 {
  background: none !important;
  -webkit-text-fill-color: var(--paper) !important;
  color: var(--paper);
  margin-bottom: 36px;
  max-width: 18ch;
}
.hero h1 .accent {
  -webkit-text-fill-color: var(--lime) !important;
  color: var(--lime) !important;
  font-style: italic;
  font-weight: 300;
  background: none !important;
}
.hero-sub {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--paper-3);
  max-width: 56ch;
  margin-bottom: 56px;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 0;
}

/* hero meta strip — right side coordinate readout */
.hero-meta {
  position: absolute;
  right: 40px;
  bottom: 60px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-3);
  text-align: right;
  line-height: 1.9;
  z-index: 2;
}
.hero-meta span { display: block; }
.hero-meta span.k { color: var(--muted); }
.hero-meta span.v { color: var(--paper); }
.hero-meta .amber { color: var(--amber); }

/* ============================================================
   SECTIONS / GENERIC
   ============================================================ */
.section { padding: var(--section-y) 0; position: relative; }
.section + .section { border-top: 1px solid var(--line); }
.section-alt { background: var(--ink-2); }

/* section header with marker number on left */
.sec-header, .section-head {
  margin-bottom: 72px;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  align-items: start;
  max-width: 100%;
}
.sec-header::before, .section-head::before {
  content: attr(data-no);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--lime);
  padding-top: 14px;
  border-top: 1px solid var(--lime);
}
.sec-header .tag, .section-head .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-bottom: 18px;
  background: none;
}
.sec-header h2, .section-head h2 {
  margin-bottom: 14px;
  max-width: 22ch;
}
.sec-header p, .section-head p {
  color: var(--paper-3);
  font-size: 1rem;
  max-width: 56ch;
}

/* ============================================================
   SERVICES — Code-block timeline on home & services pages
   Replaces "glass-grid" with vertical numbered rows
   ============================================================ */
.glass-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}
.glass-card {
  display: grid;
  grid-template-columns: 60px 1fr 2fr 40px;
  grid-template-areas: "n title desc arrow";
  gap: 32px;
  align-items: start;
  padding: 36px 12px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background var(--t);
}
.glass-card h3 { grid-area: title; }
.glass-card p { grid-area: desc; }
.glass-card:hover { background: var(--ink-2); }
.glass-card::before {
  content: counter(svcc, decimal-leading-zero);
  counter-increment: svcc;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--paper-3);
  padding-top: 6px;
  grid-area: n;
}
.glass-grid { counter-reset: svcc; }
.glass-card .icon-wrap {
  display: none;
}
.glass-card h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--paper);
  margin: 0;
  letter-spacing: -0.01em;
}
.glass-card p {
  color: var(--paper-3);
  font-size: 0.95rem;
  margin: 0;
}
.glass-card::after {
  content: '→';
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--paper-3);
  text-align: right;
  transition: all var(--t);
  grid-area: arrow;
  padding-top: 6px;
}
.glass-card:hover::after {
  color: var(--lime);
  transform: translateX(6px);
}

/* ============================================================
   WHY US — Marquee strip
   ============================================================ */
.features-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--line-strong);
}
.feature-bar {
  display: block;
  padding: 40px 36px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background var(--t);
  position: relative;
}
.feature-bar:nth-child(2n) { border-right: none; }
.feature-bar:nth-last-child(-n+2) { border-bottom: none; }
.feature-bar:hover { background: var(--ink-2); transform: none; }
.feature-bar .f-num {
  display: inline-block;
  width: auto; height: auto;
  background: none;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  border-radius: 0;
  margin-bottom: 20px;
}
.feature-bar .f-num::before { content: '— '; color: var(--paper-3); }
.feature-bar .f-content h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  margin-bottom: 8px;
  color: var(--paper);
}
.feature-bar .f-content p {
  color: var(--paper-3);
  font-size: 0.94rem;
  margin: 0;
}

/* ============================================================
   STATS STRIP — distinct from hero, only on home below hero
   ============================================================ */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink);
}
.stats-strip .item {
  padding: 48px 36px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.stats-strip .item:last-child { border-right: none; }
.stats-strip .k {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
}
.stats-strip .v {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--lime);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stats-strip .item:nth-child(2) .v { color: var(--amber); }
.stats-strip .item:nth-child(4) .v { color: var(--paper); }
.stats-strip .desc {
  font-size: 0.86rem;
  color: var(--paper-3);
  margin: 0;
}
/* Old hero-stats — no longer used in hero, but if rendered show as stats-strip variant */
.hero-stats {
  display: none;
}

/* ============================================================
   CTA — inline ribbon, not a giant banner
   ============================================================ */
.cta-section {
  background: var(--ink);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 0;
}
.cta-section .container { padding: 0; }
.cta-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 40px;
  padding: 36px 40px;
  max-width: var(--content-max);
  margin: 0 auto;
  position: relative;
}
.cta-inner::before {
  content: '⟶';
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--lime);
}
.cta-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  font-weight: 400;
  margin: 0;
  max-width: none;
  color: var(--paper);
}
.cta-inner p { display: none; }
.cta-inner .btn { white-space: nowrap; }

/* ============================================================
   PAGE HERO — for inner pages
   ============================================================ */
.page-hero {
  padding: 140px 0 80px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 700px 400px at 90% 0%, rgba(200, 255, 58, 0.05), transparent 60%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  gap: 10px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-bottom: 28px;
}
.breadcrumb a { color: var(--paper-3); }
.breadcrumb a:hover { color: var(--lime); }
.breadcrumb .sep { color: var(--muted); }
.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  margin-bottom: 22px;
  max-width: 18ch;
}
.page-hero > .container > p {
  color: var(--paper-3);
  font-size: 1.05rem;
  max-width: 60ch;
}

/* ============================================================
   ABOUT — Two-column intro becomes layered editorial
   ============================================================ */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  padding-top: 8px;
}
.about-split > div:first-child .tag { margin-bottom: 18px; }
.about-split h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.1;
  margin-bottom: 28px !important;
  color: var(--paper);
}
.about-split p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper-2);
  margin-bottom: 1.1em;
}
.about-visual {
  aspect-ratio: 1;
  max-width: 460px;
  background: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.about-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent 0 38px, var(--line) 38px 39px),
    repeating-linear-gradient(90deg, transparent 0 38px, var(--line) 38px 39px);
  opacity: 0.6;
}
.about-visual::after {
  content: 'CO. 2192986';
  position: absolute;
  bottom: 20px;
  left: 24px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--lime);
}
.about-visual svg {
  width: 55%; height: 55%;
  position: relative;
  z-index: 1;
}
.about-visual svg path,
.about-visual svg circle,
.about-visual svg line { stroke: var(--paper); }

/* MVV — vertical numbered rows, full width */
.mvv-row {
  display: flex;
  flex-direction: column;
  margin-top: 32px;
  border-top: 1px solid var(--line-strong);
}
.mvv-pill {
  display: grid;
  grid-template-columns: 200px 1fr 1fr;
  gap: 36px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  border-left: none;
  border-radius: 0;
  align-items: baseline;
  transition: padding var(--t);
}
.mvv-pill:hover { padding-left: 12px; background: transparent; border-left: none; }
.mvv-pill h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0;
}
.mvv-pill p {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-style: italic;
  font-weight: 300;
  color: var(--paper);
  margin: 0;
  line-height: 1.4;
  grid-column: 2 / span 2;
}

/* Credentials — compact mono table */
.cred-block {
  margin-top: 64px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 0;
}
.cred-block h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
  padding: 20px 28px;
  border-bottom: 1px solid var(--line-strong);
  margin: 0;
}
.cred-list { display: block; }
.cred-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  color: var(--paper-2);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.6;
}
.cred-item:last-child { border-bottom: none; }
.cred-item .check {
  width: auto; height: auto;
  background: none;
  border-radius: 0;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.cred-item .check::before { content: '✦'; }

/* ============================================================
   SERVICES PAGE — Vertical timeline, no left/right alternation
   ============================================================ */
.svc-block {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  align-items: start;
  padding: 64px 0;
  border-top: 1px solid var(--line);
  border-bottom: none;
}
.svc-block:first-of-type { border-top: 1px solid var(--line-strong); }
.svc-block:last-of-type { border-bottom: 1px solid var(--line-strong); }
.svc-block.reverse .svc-text { order: 0; }
.svc-block .svc-visual {
  aspect-ratio: 1;
  max-width: 200px;
  border-radius: 0;
  background: var(--ink-2) !important;
  border: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.svc-block:hover .svc-visual { transform: none; }
.svc-block:nth-child(1) .svc-visual,
.svc-block:nth-child(2) .svc-visual,
.svc-block:nth-child(3) .svc-visual,
.svc-block:nth-child(4) .svc-visual {
  background: var(--ink-2);
}
.svc-block .svc-visual svg {
  width: 50%; height: 50%;
  color: var(--lime);
  opacity: 1;
}
.svc-block:nth-child(even) .svc-visual svg { color: var(--amber); }
.svc-block .svc-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 18px;
}
.svc-block .svc-meta::before {
  content: '';
  display: inline-block;
  width: 24px; height: 1px;
  background: var(--lime);
  margin-right: 12px;
  vertical-align: middle;
}
.svc-block h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  margin-bottom: 18px;
}
.svc-block .lead {
  font-size: 1.02rem;
  color: var(--paper-2);
  margin-bottom: 28px;
  max-width: 60ch;
}
.svc-block ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 32px;
  margin-top: 8px;
}
.svc-block li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  color: var(--paper-2);
  font-size: 0.92rem;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
}
.svc-block li .li-dot {
  width: auto; height: auto;
  background: none;
  border-radius: 0;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}
.svc-block li .li-dot::before { content: '▸'; }

/* ============================================================
   SOLUTIONS — Process flow horizontal mono, industries accordion
   ============================================================ */
.process-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 32px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}
.pstep {
  text-align: left;
  padding: 36px 24px 36px 0;
  background: transparent;
  border: none;
  border-right: 1px solid var(--line);
  border-radius: 0;
  position: relative;
}
.pstep:last-child { border-right: none; }
.pstep:hover { transform: none; }
.pstep::after { display: none; }
.pstep-num {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  width: auto; height: auto;
  margin: 0 0 18px 0;
  background: none;
  border-radius: 0;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.18em;
}
.pstep-num::before {
  content: 'STEP /';
  color: var(--paper-3);
  margin-right: 4px;
}
.pstep h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  margin-bottom: 8px;
  color: var(--paper);
}
.pstep p {
  font-size: 0.92rem;
  color: var(--paper-3);
  margin: 0;
}

/* Industries — vertical accordion-style list */
.ind-grid {
  display: flex;
  flex-direction: column;
  margin-top: 16px;
  border-top: 1px solid var(--line-strong);
}
.ind-card {
  padding: 36px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  display: grid;
  grid-template-columns: 80px 1fr 2fr;
  gap: 36px;
  align-items: start;
  transition: padding var(--t);
}
.ind-card:hover {
  padding-left: 16px;
  background: transparent;
  box-shadow: none;
  transform: none;
}
.ind-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  padding-top: 6px;
}
.ind-tag::before { content: '◐ '; color: var(--lime); }
.ind-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  color: var(--paper);
  margin: 0;
  letter-spacing: -0.01em;
}
.ind-card > p {
  display: none;
}
.ind-card ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
}
.ind-card li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--paper-2);
  padding-left: 24px;
  position: relative;
  letter-spacing: 0.01em;
}
.ind-card li::before {
  content: '└';
  position: absolute;
  left: 0;
  color: var(--lime);
}

/* ============================================================
   CONTACT — flat editorial form, not enclosed box
   ============================================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 0;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  overflow: visible;
}
.contact-sidebar {
  padding: 48px 40px;
  background: var(--ink-2);
  border-right: 1px solid var(--line-strong);
}
.contact-sidebar h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.contact-sidebar .sub {
  color: var(--paper-3);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  margin-bottom: 40px;
  line-height: 1.7;
}
.cinfo-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.cinfo-item:last-child { border-bottom: none; }
.cinfo-item .ci-icon {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 0;
  background: transparent;
  border: 1px solid var(--line-strong);
  display: flex; align-items: center; justify-content: center;
  color: var(--lime);
}
.cinfo-item .ci-icon svg { width: 16px; height: 16px; }
.cinfo-item .ci-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-bottom: 6px;
}
.cinfo-item .ci-value {
  color: var(--paper);
  font-size: 0.95rem;
  font-weight: 400;
  line-height: 1.6;
}
.cinfo-item .ci-value a { color: var(--paper); }
.cinfo-item .ci-value a:hover { color: var(--lime); }

.contact-main { padding: 48px 48px; background: var(--ink); }
.contact-main h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.contact-main .sub {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--paper-3);
  margin-bottom: 36px;
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.fgroup { margin-bottom: 24px; }
.fgroup label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-bottom: 10px;
}
.fgroup label .req { color: var(--amber); }
.fgroup input,
.fgroup select,
.fgroup textarea {
  width: 100%;
  padding: 12px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line-strong);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 0.98rem;
  border-radius: 0;
  outline: none;
  transition: border-color var(--t);
}
.fgroup input:focus,
.fgroup select:focus,
.fgroup textarea:focus {
  border-bottom-color: var(--lime);
  box-shadow: none;
  background: transparent;
}
.fgroup input::placeholder,
.fgroup textarea::placeholder { color: var(--muted); }
.fgroup select option { background: var(--ink-2); color: var(--paper); }
.fgroup textarea { resize: vertical; min-height: 120px; padding-top: 12px; }
.fnote {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--paper-3);
  margin-top: 20px;
}

/* ============================================================
   FOOTER — Single-strip terminal style
   ============================================================ */
.site-footer {
  background: var(--ink);
  border-top: 1px solid var(--line-strong);
  padding: 60px 0 28px;
}
.footer-body {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand { margin-bottom: 22px; display: inline-flex; flex-direction: row; gap: 14px; align-items: center; }
.footer-brand .brand .brand-logo { width: 38px; height: 38px; }
.footer-brand .brand .brand-text {
  writing-mode: horizontal-tb;
  transform: none;
  text-align: left;
  margin-top: 0;
  flex-direction: column;
  display: flex;
}
.footer-brand .brand .brand-zh {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--paper);
}
.footer-brand .brand .brand-en {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  margin-top: 4px;
  color: var(--paper-3);
}
.footer-brand p {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--paper-3);
  margin: 0;
  max-width: 32ch;
  line-height: 1.7;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 18px;
}
.footer-col ul { display: block; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: var(--paper-2);
  font-size: 0.92rem;
}
.footer-col a:hover { color: var(--lime); }
.footer-col.static-text li,
.footer-col.static-text {
  color: var(--paper-3);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--paper-3);
}

/* ============================================================
   REVEAL ANIMATIONS — preserve from old JS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .footer-body, .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-body .footer-col.static-text { grid-column: 1 / -1; border-top: 1px solid var(--line); padding-top: 24px; margin-top: 8px; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .stats-strip .item { border-bottom: 1px solid var(--line); }
  .stats-strip .item:nth-child(2) { border-right: none; }
  .stats-strip .item:nth-child(3), .stats-strip .item:nth-child(4) { border-bottom: none; }
}
@media (max-width: 900px) {
  .about-split { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { max-width: 100%; }
  .svc-block { grid-template-columns: 1fr; gap: 32px; padding: 48px 0; }
  .svc-block .svc-visual { max-width: 140px; }
  .svc-block ul { grid-template-columns: 1fr; }
  .ind-card { grid-template-columns: 1fr; gap: 12px; }
  .ind-tag { padding-top: 0; }
  .glass-card {
    grid-template-columns: 44px 1fr 28px;
    grid-template-areas:
      "n title arrow"
      ".  desc  desc";
    gap: 10px 18px;
    padding: 26px 8px;
  }
  .contact-layout { grid-template-columns: 1fr; }
  .contact-sidebar { border-right: none; border-bottom: 1px solid var(--line-strong); }
  .form-grid { grid-template-columns: 1fr; }
  .mvv-pill { grid-template-columns: 1fr; gap: 12px; }
  .mvv-pill p { grid-column: 1; }
  .process-flow { grid-template-columns: 1fr 1fr; }
  .pstep { border-bottom: 1px solid var(--line); padding: 28px; }
  .pstep:nth-child(odd) { border-right: 1px solid var(--line); }
  .pstep:nth-child(2n) { border-right: none; }
  .pstep:nth-last-child(-n+2) { border-bottom: none; }
  .footer-body, .footer-grid { grid-template-columns: 1fr 1fr; }
  .features-row { grid-template-columns: 1fr; }
  .feature-bar { border-right: none; }
  .feature-bar:nth-child(2n-1) { border-right: none; }
  .feature-bar:not(:last-child) { border-bottom: 1px solid var(--line); }
  .cta-inner { grid-template-columns: 1fr; padding: 28px; gap: 18px; text-align: left; }
  .cta-inner::before { display: none; }
}
@media (max-width: 720px) {
  :root { --rail-w: 0px; --section-y: 80px; }
  body { padding-left: 0; }

  .site-header {
    width: 100%;
    height: 64px;
    inset: 0 0 auto 0;
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 0 20px;
    justify-content: space-between;
  }
  .header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 12px; }
  .brand { flex-direction: row; gap: 10px; align-items: center; padding: 0; }
  .brand-logo { width: 32px; height: 32px; }
  .brand-text {
    writing-mode: horizontal-tb;
    transform: none;
    margin-top: 0;
    flex-direction: column;
    display: flex;
  }
  .brand-text .brand-zh { font-size: 1rem; }
  .brand-text .brand-en { font-size: 0.62rem; margin-top: 2px; }

  .nav {
    position: fixed;
    inset: 64px 0 0 0;
    flex-direction: column;
    justify-content: flex-start;
    background: var(--ink);
    padding: 32px 24px;
    display: none;
    gap: 0;
    z-index: 999;
  }
  .nav.open { display: flex; }
  .nav a {
    writing-mode: horizontal-tb;
    transform: none;
    border-left: none;
    border-bottom: 1px solid var(--line);
    padding: 22px 0;
    font-size: 1rem;
    text-align: left;
  }
  .nav a:hover, .nav a.active { border-left: none; border-bottom-color: var(--lime); }

  .header-actions { flex-direction: row; padding-top: 0; }
  .lang-switch { flex-direction: row; }
  .menu-toggle { display: inline-flex; }

  .hero { padding-top: 110px; padding-bottom: 60px; min-height: auto; }
  .hero-meta { position: static; text-align: left; margin-top: 32px; }
  .page-hero { padding: 90px 0 50px; }
  .sec-header, .section-head { grid-template-columns: 60px 1fr; gap: 16px; }
  .container { padding: 0 24px; }
  .contact-main, .contact-sidebar { padding: 32px 24px; }
}