/* ═══════════════════════════════════════
   Tongle Lab — style.css
   Palette: neutral bg + vivid red accent
   ═══════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
  --bg:     #F2F1EF;
  --bg2:    #E8E7E4;
  --card:   #F8F7F6;
  --border: #DDDBD7;
  --ink:    #111110;
  --sub:    #2E2D2B;
  --muted:  #706E6A;
  --faint:  #A09D99;
  --acc:    #CC1A1A;
  --acc-l:  #FFF0F0;
  --acc-m:  #E83535;
  --dark:   #1E1D1B;
  --dark2:  #272522;

  --font-sans:  'DM Sans', system-ui, -apple-system, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, serif;

  --section-pad: clamp(5rem, 8vw, 7rem);
  --max-w: 1280px;
  --px: clamp(1.25rem, 4vw, 2.5rem);
}

/* ── Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
p { line-height: 1.72; }
input, textarea, button, select { font-family: var(--font-sans); }
abbr { text-decoration: none; }

/* ── Skip link for accessibility ── */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--acc);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 10000;
  border-radius: 0 0 0.5rem 0;
}
.skip-link:focus { top: 0; }

/* ────────────────────────────────────
   Custom Cursor
   ──────────────────────────────────── */
#cursor-dot,
#cursor-ring,
#cursor-glow {
  position: fixed;
  pointer-events: none;
  border-radius: 50%;
  transform-origin: center;
  will-change: transform;
}
#cursor-dot {
  width: 8px; height: 8px;
  background: var(--acc);
  z-index: 9999;
  transition: transform 0.15s ease, opacity 0.2s ease;
  mix-blend-mode: multiply;
}
#cursor-ring {
  width: 38px; height: 38px;
  border: 1.5px solid rgba(204,26,26,0.5);
  z-index: 9998;
  transition:
    width  0.35s cubic-bezier(0.34,1.56,0.64,1),
    height 0.35s cubic-bezier(0.34,1.56,0.64,1),
    background 0.2s ease,
    border-color 0.2s ease;
}
#cursor-ring.hovering-btn {
  width: 56px; height: 56px;
  border-color: rgba(204,26,26,0.9);
  border-width: 2px;
  background: rgba(204,26,26,0.07);
}
#cursor-ring.hovering-card {
  width: 64px; height: 64px;
  background: rgba(204,26,26,0.04);
}
#cursor-ring.clicking { transform: scale(0.8); }
#cursor-dot.hovering-btn { opacity: 0; transform: scale(0); }
#cursor-glow {
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(204,26,26,0.055) 0%, transparent 65%);
  z-index: 9990;
  mix-blend-mode: multiply;
}

/* ────────────────────────────────────
   Navbar
   ──────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.4s, backdrop-filter 0.4s, border-color 0.4s;
}
#navbar.scrolled {
  background: rgba(236,234,228,0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo img {
  height: 2.75rem; width: auto;
  filter: brightness(0) saturate(100%) invert(11%) sepia(10%) saturate(900%) hue-rotate(345deg) brightness(92%);
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}
.nav-logo:hover img { transform: scale(1.05); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  background: var(--ink) !important;
  color: var(--card) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 10px rgba(17,17,16,0.15);
}
.nav-cta:hover {
  background: var(--acc) !important;
  color: #fff !important;
  box-shadow: 0 6px 20px rgba(204,26,26,0.3);
}

/* ────────────────────────────────────
   Layout utilities
   ──────────────────────────────────── */
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
}
.section-main {
  padding: var(--section-pad) 0;
  background: var(--bg);
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border);
}
.section-alt {
  padding: var(--section-pad) 0;
  background: var(--bg2);
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border);
}
.section-dark {
  padding: var(--section-pad) 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.two-col {
  display: grid;
  grid-template-columns: 4fr 6fr;
  gap: clamp(3rem, 5vw, 6rem);
  align-items: start;
}
.col-left-sticky { position: sticky; top: 7rem; }

@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; gap: 2.5rem; }
  .col-left-sticky { position: static; }
}

/* ── Section Labels ── */
.section-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--acc);
}
.section-label.dark { color: var(--acc); }
.accent-line {
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--acc);
  flex-shrink: 0;
}

/* ── Background Decorations ── */
.watermark-num {
  position: absolute;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(200px, 32vw, 480px);
  color: transparent;
  -webkit-text-stroke: 1.5px var(--border);
  right: -0.06em;
  top: 50%;
  transform: translateY(-50%);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  opacity: 0.6;
}
.section-bg-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(80px, 16vw, 220px);
  color: var(--ink);
  opacity: 0.04;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.04em;
}

/* ────────────────────────────────────
   Typography
   ──────────────────────────────────── */
h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin-bottom: 1.25rem;
}
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
p { color: var(--muted); font-size: 0.9375rem; }
.accent-italic {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--acc);
  font-weight: 400;
}
.accent-italic-m {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--acc-m);
  font-weight: 400;
}
.acc-text { color: var(--acc); }
.faint-text { color: var(--faint); }
.fw-bold { font-weight: 700; }

/* ────────────────────────────────────
   Buttons
   ──────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: var(--ink);
  color: var(--card);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(17,17,16,0.18);
  transition: background 0.2s, box-shadow 0.2s, color 0.2s;
}
.btn-primary:hover {
  background: var(--acc);
  box-shadow: 0 8px 24px rgba(204,26,26,0.32);
  color: #fff;
}
.btn-ghost {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}
.btn-ghost:hover { color: var(--ink); }
.link-accent {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--acc);
  transition: gap 0.2s;
}
.link-accent:hover { gap: 0.5rem; }

/* ────────────────────────────────────
   Hero
   ──────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: 6rem;
  padding-bottom: 5rem;
  overflow: hidden;
}
.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% 30%, #C8C4BB 0%, var(--bg) 70%);
}
.hero-dots {
  position: absolute;
  top: 0; right: 0;
  width: 50%; height: 67%;
  opacity: 0.18;
  background-image: radial-gradient(circle, var(--muted) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
}
.hero-lab-text {
  position: absolute;
  font-family: var(--font-serif);
  font-size: clamp(180px, 28vw, 420px);
  color: transparent;
  -webkit-text-stroke: 1.5px var(--border);
  line-height: 0.85;
  right: -0.1em;
  bottom: -0.1em;
  pointer-events: none;
  user-select: none;
  transition: transform 0.8s cubic-bezier(0.23,1,0.32,1);
}
.hero-content { position: relative; z-index: 2; }
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--acc);
}
.hero-heading {
  font-size: clamp(52px, 9vw, 120px);
  max-width: 11ch;
  margin-bottom: 2.5rem;
  line-height: 0.92;
  letter-spacing: -0.02em;
  transition: transform 0.8s cubic-bezier(0.23,1,0.32,1);
}
.hero-body {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
@media (min-width: 640px) {
  .hero-body { flex-direction: row; align-items: center; }
}
.hero-body p { max-width: 28ch; }
.hero-actions { display: flex; align-items: center; gap: 1rem; flex-shrink: 0; }
.hero-stats {
  margin-top: 4rem;
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2.5rem;
  border-top: 1px solid var(--border);
}
.stat-item { display: flex; flex-direction: column; gap: 0.125rem; }
.stat-value {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(38px, 4.5vw, 58px);
  color: var(--acc);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.hero-status {
  margin-left: auto;
  display: none;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--faint);
}
@media (min-width: 1024px) { .hero-status { display: flex; } }
.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #22c55e;
  display: inline-block;
  animation: pulse-dot 2.5s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

/* ────────────────────────────────────
   What We Do — Comparison Cards
   ──────────────────────────────────── */
.comparison-card {
  border-radius: 1rem;
  border: 1px solid var(--border);
  padding: 1.5rem;
  background: var(--card);
  position: relative;
  overflow: hidden;
}
.card-legacy { margin-bottom: 1rem; }
.card-ai { border: 2px solid var(--acc); }
.card-ai::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--acc), var(--acc-m), transparent);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.card-tag-faint {
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--faint);
}
.card-tag-acc {
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--acc);
}
.badge-faint {
  font-size: 0.75rem;
  padding: 0.2rem 0.625rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--faint);
  background: var(--bg2);
}
.badge-acc {
  font-size: 0.75rem;
  padding: 0.2rem 0.625rem;
  border-radius: 100px;
  color: var(--acc);
  background: var(--acc-l);
  font-weight: 600;
}
.tag-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.25rem; }
.tag-faint {
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--bg2);
}
.tag-acc {
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  border-radius: 100px;
  border: 1px solid rgba(204,26,26,0.2);
  color: var(--acc);
  background: var(--acc-l);
  font-weight: 500;
}
.progress-row { display: flex; align-items: center; gap: 0.75rem; }
.progress-bar {
  flex: 1;
  height: 6px;
  border-radius: 100px;
  background: var(--bg2);
  overflow: hidden;
}
.progress-fill { height: 100%; border-radius: 100px; }
.progress-fill-acc {
  background: linear-gradient(to right, var(--acc), var(--acc-m));
}

/* ────────────────────────────────────
   Services — Accordion
   ──────────────────────────────────── */
.stat-mini-list { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 2rem; }
.stat-mini { display: flex; align-items: center; gap: 0.75rem; }
.stat-mini-val {
  font-family: var(--font-sans);
  font-weight: 900;
  color: var(--acc);
  min-width: 2.5rem;
  font-size: 1.1rem;
}
.accordion { border-top: 1px solid var(--border); }
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-trigger {
  width: 100%;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0.25rem;
  gap: 1rem;
  text-align: left;
  transition: transform 0.2s;
}
.accordion-trigger:hover { transform: translateX(4px); }
.accordion-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex: 1;
  min-width: 0;
}
.acc-num {
  font-size: 0.75rem;
  color: var(--faint);
  min-width: 1.25rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}
.acc-icon {
  width: 2.25rem; height: 2.25rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg2);
  font-size: 1rem;
  flex-shrink: 0;
  transition: background 0.25s, transform 0.25s;
}
.accordion-item.open .acc-icon {
  background: var(--acc);
  transform: scale(1.05);
}
.acc-title { font-weight: 600; color: var(--ink); font-size: 0.9375rem; }
.acc-sub { font-size: 0.75rem; color: var(--faint); margin-top: 0.125rem; }
.acc-chevron { color: var(--faint); font-size: 0.9rem; transition: transform 0.25s; }
.accordion-item.open .acc-chevron { transform: rotate(180deg); }
.accordion-body {
  overflow: hidden;
  padding: 0 0.25rem 1.25rem 3.75rem;
}
.accordion-body p { font-size: 0.875rem; color: var(--muted); }

/* ────────────────────────────────────
   Workflow
   ──────────────────────────────────── */
.workflow-grid-bg {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    linear-gradient(var(--ink) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.workflow-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1rem;
}
@media (min-width: 1024px) {
  .workflow-header { flex-direction: row; align-items: flex-end; justify-content: space-between; }
}
.workflow-tagline { font-size: 0.875rem; color: var(--muted); }
.timeline-bar {
  height: 2px;
  background: linear-gradient(to right, var(--acc), var(--border));
  margin: 2rem 0;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 1s cubic-bezier(0.23,1,0.32,1);
}
.timeline-bar.revealed { transform: scaleX(1) !important; }
.workflow-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
@media (max-width: 768px) { .workflow-cards { grid-template-columns: 1fr; } }
.workflow-card {
  border-radius: 1rem;
  padding: 1.75rem;
  border: 1px solid var(--border);
  background: var(--card);
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s ease, border-color 0.25s ease;
  transform-style: preserve-3d;
}
.card-accent-line {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--acc), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.workflow-card:hover .card-accent-line { opacity: 1; }
.card-accent-line.green { background: linear-gradient(to right, #2A7A56, transparent); }
.card-accent-line.brown { background: linear-gradient(to right, #7A4A1A, transparent); }
.card-num {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 3.75rem;
  line-height: 1;
  margin-bottom: 1.5rem;
  user-select: none;
  color: var(--acc-l);
}
.green-num { color: #EAF5EF; }
.brown-num { color: #F5EDE4; }
.card-sub-red {
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 0.5rem; color: var(--acc);
}
.card-sub-green {
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 0.5rem; color: #2A7A56;
}
.card-sub-brown {
  font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 0.5rem; color: #7A4A1A;
}
.workflow-card h3 { color: var(--ink); }
.metrics-strip {
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: var(--card);
  padding: 1.25rem 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
}
.metric { display: flex; align-items: center; gap: 0.75rem; }
.metric-val {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--acc);
}
.metric-label { font-size: 0.75rem; color: var(--muted); }

/* ────────────────────────────────────
   Intake
   ──────────────────────────────────── */
.intake-steps { display: flex; flex-direction: column; gap: 0.75rem; }
.intake-item {
  border-radius: 1rem;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
}
.intake-item.open {
  background: var(--card);
  border-color: var(--acc);
  box-shadow: 0 4px 24px rgba(204,26,26,0.08);
}
.intake-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: none;
  border: none;
  text-align: left;
}
.intake-icon {
  width: 2.5rem; height: 2.5rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg2);
  font-size: 1rem;
  flex-shrink: 0;
  transition: background 0.25s;
}
.intake-item.open .intake-icon { background: var(--acc); }
.intake-info { flex: 1; min-width: 0; }
.intake-title-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.intake-title { font-weight: 600; font-size: 0.875rem; color: var(--ink); }
.intake-badge {
  font-size: 0.75rem;
  padding: 0.125rem 0.625rem;
  border-radius: 100px;
  background: var(--bg2);
  color: var(--faint);
  margin-left: auto;
  transition: background 0.25s, color 0.25s;
}
.intake-item.open .intake-badge { background: var(--acc-l); color: var(--acc); }
.intake-en { font-size: 0.75rem; color: var(--faint); margin-top: 0.125rem; }
.intake-item.open .acc-chevron { transform: rotate(180deg); }
.intake-body { padding: 0 1.25rem 1.25rem 4.5rem; }
.intake-body p { font-size: 0.875rem; color: var(--muted); }

.intake-dots {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.intake-dot {
  width: 2rem; height: 2rem;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg2);
  color: var(--faint);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s cubic-bezier(0.34,1.56,0.64,1);
}
.intake-dot.active {
  background: var(--acc);
  border-color: var(--acc);
  color: #fff;
  transform: scale(1.1);
}
.intake-dot-connector {
  width: 1.25rem;
  height: 1px;
  background: var(--border);
  transition: background 0.25s;
}
.intake-dot-connector.active { background: var(--acc); }
.intake-step-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--acc);
  margin-bottom: 1.5rem;
  min-height: 1.2em;
}
.intake-quote {
  border-left: 2px solid var(--acc);
  padding-left: 1.25rem;
  margin: 0 0 2rem;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--sub);
  line-height: 1.6;
}

/* ────────────────────────────────────
   Contact
   ──────────────────────────────────── */
.contact-dots {
  position: absolute;
  inset: 0;
  opacity: 0.07;
  background-image: radial-gradient(circle, #A09D99 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  pointer-events: none;
}
.contact-top-line {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(204,26,26,0.3), transparent);
}
.light-heading { color: #F0EDE7; }
.contact-sub { color: #7A7068; max-width: 36ch; margin-bottom: 2.5rem; }
.email-link {
  font-size: 1.125rem;
  font-weight: 600;
  color: #F0EDE7;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: color 0.2s;
}
.email-link:hover { color: var(--acc-m); }
.contact-col { align-items: center; }

/* Form */
.contact-form-card {
  background: #272522;
  border: 1px solid #302E2B;
  border-radius: 1rem;
  padding: 1.75rem;
}
.form-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #7A7068;
  margin-bottom: 1.25rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }
.form-group { display: flex; flex-direction: column; gap: 0.375rem; margin-bottom: 1rem; }
.form-group label { font-size: 0.8125rem; color: #9A9690; font-weight: 500; }
.form-group input,
.form-group textarea {
  background: #1C1814;
  border: 1px solid #2A2620;
  border-radius: 0.625rem;
  padding: 0.75rem 1rem;
  color: #C8C4BC;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--acc);
  box-shadow: 0 0 0 3px rgba(204,26,26,0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #4A4540; }
.btn-submit {
  width: 100%;
  padding: 0.875rem;
  background: var(--acc);
  color: #fff;
  border: none;
  border-radius: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  margin-top: 0.5rem;
  box-shadow: 0 4px 16px rgba(204,26,26,0.35);
  transition: background 0.2s, box-shadow 0.2s;
}
.btn-submit:hover { background: var(--acc-m); box-shadow: 0 8px 24px rgba(204,26,26,0.45); }
.btn-submit:disabled { opacity: 0.55; }
.form-result {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  text-align: center;
  min-height: 1.4em;
  transition: opacity 0.3s;
}
.form-result.success { color: #22c55e; }
.form-result.error { color: var(--acc-m); }

/* ────────────────────────────────────
   Footer
   ──────────────────────────────────── */
footer {
  background: #1A1917;
  border-top: 1px solid #2A2826;
  padding: 1.75rem 0;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-left { display: flex; align-items: center; gap: 0.75rem; }
.footer-logo {
  height: 1.25rem; width: auto;
  filter: invert(1) brightness(0.85);
  opacity: 0.85;
}
.footer-copy { font-size: 0.75rem; color: #fff; }
.footer-right { display: flex; align-items: center; gap: 0.5rem; font-size: 0.75rem; color: #fff; }

/* ────────────────────────────────────
   Scroll Reveal Animations
   ──────────────────────────────────── */
.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.23,1,0.32,1), transform 0.7s cubic-bezier(0.23,1,0.32,1);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-28px);
  transition: opacity 0.7s cubic-bezier(0.23,1,0.32,1), transform 0.7s cubic-bezier(0.23,1,0.32,1);
}
.reveal-right {
  opacity: 0;
  transform: translateX(28px);
  transition: opacity 0.7s cubic-bezier(0.23,1,0.32,1), transform 0.7s cubic-bezier(0.23,1,0.32,1);
}
.revealed {
  opacity: 1 !important;
  transform: none !important;
}
.reveal-delay   { transition-delay: 0.12s !important; }
.reveal-delay-2 { transition-delay: 0.24s !important; }

/* ────────────────────────────────────
   Hero quick links
   ──────────────────────────────────── */
.hero-quick-links {
  display: flex;
  gap: 0.625rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}
.hero-quick-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.375rem 1rem;
  background: var(--card);
  transition: color 0.18s, border-color 0.18s;
}
.hero-quick-link:hover { color: var(--acc); border-color: var(--acc); }

/* ────────────────────────────────────
   適合誰 section
   ──────────────────────────────────── */
#for-who { padding: var(--section-pad) 0; }
.for-who-header { text-align: center; margin-bottom: 3rem; }
.for-who-header h2 { margin-bottom: 0.5rem; }
.for-who-header p { color: var(--muted); font-size: 1.0625rem; }
.for-who-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}
.persona-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.persona-card:hover { border-color: var(--acc); box-shadow: 0 4px 24px rgba(204,26,26,0.08); }
.persona-icon { font-size: 2rem; margin-bottom: 0.875rem; }
.persona-title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 0.5rem; }
.persona-desc { font-size: 0.875rem; color: var(--sub); line-height: 1.65; }
.persona-pain {
  margin-top: 1rem;
  padding-top: 0.875rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--acc);
}

/* ────────────────────────────────────
   服務方案 (Products)
   ──────────────────────────────────── */
.products-header { text-align: center; margin-bottom: 3rem; }
.products-header h2 { margin-bottom: 0.5rem; }
.products-header p { color: var(--muted); font-size: 1.0625rem; }
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.5rem;
}
.product-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  position: relative;
}
.product-card:hover { border-color: #B5B0AA; box-shadow: 0 8px 32px rgba(17,17,16,0.07); }
.product-card.featured {
  border-color: var(--acc);
  background: linear-gradient(135deg, var(--card) 0%, #FFF8F8 100%);
}
.product-card.featured:hover { box-shadow: 0 8px 32px rgba(204,26,26,0.12); }
.product-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
  background: var(--bg2);
  color: var(--muted);
  align-self: flex-start;
}
.product-card.featured .product-badge { background: var(--acc); color: #fff; }
.product-name { font-size: 1.25rem; font-weight: 700; color: var(--ink); }
.product-timeframe { font-size: 0.8125rem; font-weight: 600; color: var(--faint); }
.product-timeframe strong { color: var(--acc); }
.product-desc { font-size: 0.875rem; color: var(--muted); line-height: 1.65; }
.product-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.25rem 0 0.5rem;
}
.product-features li {
  font-size: 0.875rem;
  color: var(--sub);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  line-height: 1.5;
}
.product-features li::before { content: '✓'; color: var(--acc); font-weight: 700; flex-shrink: 0; margin-top: 0.05em; }
.product-cta-link {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 700;
  text-align: center;
  transition: all 0.2s;
  border: 2px solid var(--acc);
  color: var(--acc);
  margin-top: auto;
}
.product-cta-link:hover { background: var(--acc); color: #fff; }
.product-card.featured .product-cta-link { background: var(--acc); color: #fff; }
.product-card.featured .product-cta-link:hover { background: var(--acc-m); border-color: var(--acc-m); }

/* ────────────────────────────────────
   案例展示
   ──────────────────────────────────── */
#cases { background: var(--bg2); padding: var(--section-pad) 0; }
.cases-header { text-align: center; margin-bottom: 3rem; }
.cases-header h2 { margin-bottom: 0.5rem; }
.cases-header p { color: var(--muted); font-size: 1.0625rem; }
/* ── Cases slider ── */
.cases-slider-wrap {
  position: relative;
}
.cases-slider-wrap::before,
.cases-slider-wrap::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 48px;
  z-index: 2;
  pointer-events: none;
}
.cases-slider-wrap::before {
  left: 0;
  background: linear-gradient(to right, var(--bg, #faf9f7), transparent);
}
.cases-slider-wrap::after {
  right: 0;
  background: linear-gradient(to left, var(--bg, #faf9f7), transparent);
}
.cases-grid {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  gap: 1.25rem;
  padding: 0.25rem 0.25rem 1.25rem;
  scrollbar-width: none;
}
.cases-grid::-webkit-scrollbar { display: none; }
.case-card {
  flex: 0 0 calc(33.333% - 0.875rem);
  min-width: 280px;
  scroll-snap-align: start;
}
@media (max-width: 900px) {
  .case-card { flex: 0 0 calc(50% - 0.625rem); }
}
@media (max-width: 580px) {
  .case-card { flex: 0 0 85%; }
}

/* Nav arrows */
.slider-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 1.25rem;
}
.slider-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--card);
  color: var(--ink);
  font-size: 16px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.18s, background 0.18s, transform 0.18s;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.slider-btn:hover {
  border-color: var(--acc);
  background: var(--acc);
  color: #fff;
  transform: scale(1.08);
}
.slider-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}
.slider-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.2s, transform 0.2s;
  cursor: pointer;
}
.slider-dot.active {
  background: var(--acc);
  transform: scale(1.3);
}
.case-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}
.case-card:hover { box-shadow: 0 8px 32px rgba(17,17,16,0.09); transform: translateY(-3px); }
.case-screen {
  height: 180px;
  background: var(--dark);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.case-screen-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  display: block;
}
.case-screen-ui {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}
.cs-topbar { height: 0.875rem; background: rgba(255,255,255,0.08); border-radius: 4px; width: 100%; }
.cs-row { display: flex; gap: 0.25rem; }
.cs-col { height: 0.5rem; border-radius: 3px; flex: 1; background: rgba(255,255,255,0.06); }
.cs-col.accent { background: rgba(204,26,26,0.5); flex: 0.4; }
.cs-col.mid { background: rgba(255,255,255,0.12); flex: 0.7; }
.cs-table { display: flex; flex-direction: column; gap: 0.2rem; margin-top: 0.25rem; }
.cs-tr { height: 0.4rem; background: rgba(255,255,255,0.05); border-radius: 2px; }
.cs-tr.head { background: rgba(204,26,26,0.25); }
.case-demo-badge {
  position: absolute;
  top: 0.625rem;
  right: 0.625rem;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(204,26,26,0.15);
  color: #FF9090;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.case-body { padding: 1.375rem; }
.case-type { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--acc); margin-bottom: 0.375rem; }
.case-title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 0.25rem; }
.case-subtitle { font-size: 0.75rem; color: var(--muted); margin-bottom: 0.5rem; }
.case-desc { font-size: 0.8125rem; color: var(--muted); line-height: 1.6; }
.case-outcome {
  margin-top: 0.875rem;
  padding-top: 0.875rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  flex-wrap: wrap;
  gap: 3px 14px;
}
.case-outcome .om { white-space: nowrap; }
.case-outcome .outcome-val { color: var(--acc); }
.cases-note { text-align: center; margin-top: 2rem; font-size: 0.8125rem; color: var(--faint); }

/* ────────────────────────────────────
   FAQ
   ──────────────────────────────────── */
#faq { padding: var(--section-pad) 0; background: var(--bg); }
.faq-header { text-align: center; margin-bottom: 3rem; }
.faq-header h2 { margin-bottom: 0.5rem; }
.faq-header p { color: var(--muted); }
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  max-width: 900px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 1.125rem 1.375rem;
  text-align: left;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: color 0.2s;
  line-height: 1.4;
}
.faq-question:hover { color: var(--acc); }
.faq-question[aria-expanded="true"] { color: var(--acc); }
.faq-chevron { flex-shrink: 0; transition: transform 0.2s; color: var(--faint); font-size: 0.75rem; }
.faq-question[aria-expanded="true"] .faq-chevron { transform: rotate(180deg); color: var(--acc); }
.faq-answer {
  padding: 0 1.375rem 1.125rem;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.72;
  display: none;
}
.faq-answer.open { display: block; }

/* ────────────────────────────────────
   Form preamble
   ──────────────────────────────────── */
.form-preamble {
  margin-bottom: 1.5rem;
  padding: 1.125rem 1.375rem;
  background: rgba(255,255,255,0.05);
  border-left: 3px solid var(--acc);
  border-radius: 0 8px 8px 0;
}
.form-preamble-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: #E8E4DC;
  margin-bottom: 0.625rem;
}
.form-preamble-steps { list-style: none; display: flex; flex-direction: column; gap: 0.375rem; }
.form-preamble-steps li {
  font-size: 0.8125rem;
  color: #9A9690;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  line-height: 1.5;
}
.preamble-num {
  flex-shrink: 0;
  width: 1.125rem;
  height: 1.125rem;
  background: var(--acc);
  color: #fff;
  border-radius: 50%;
  font-size: 0.5625rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.05em;
}

/* ────────────────────────────────────
   Responsive helpers
   ──────────────────────────────────── */
@media (max-width: 640px) {
  .hero-stats { gap: 1.5rem; }
  .metrics-strip { padding: 1rem 1.25rem; }
  .nav-links a:not(.nav-cta) { display: none; }
  .products-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
}