/* ===========================================================
   W.E. Statistical Consulting — Stylesheet
   =========================================================== */

:root {
  --color-primary: #0B2545;      /* Deep Navy */
  --color-primary-light: #16386f;
  --color-accent-fill: #2EC4B6;  /* Mint fill */
  --color-accent-text: #0B7A70;  /* Mint text-link */
  --color-bg: #FAFAFA;           /* Off-white */
  --color-surface: #FFFFFF;
  --color-text: #1F2937;         /* Dark Slate */
  --color-text-muted: #5b6675;
  --color-border: #e3e7ec;

  --font-base: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;

  --max-width: 1120px;
  --radius: 14px;
  --nav-height: 68px;

  --shadow-sm: 0 1px 2px rgba(11, 37, 69, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 37, 69, 0.08);
  --shadow-lg: 0 16px 40px rgba(11, 37, 69, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--color-accent-text); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: var(--font-base);
  color: var(--color-primary);
  line-height: 1.3;
  margin: 0 0 0.6em;
  font-weight: 700;
}

p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

strong { color: var(--color-primary); font-weight: 700; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 88px 0;
  scroll-margin-top: var(--nav-height);
}

.section--alt { background: var(--color-surface); }

.section-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: 0.8em;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.section-intro {
  max-width: 680px;
  color: var(--color-text-muted);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: 0 0 8px 0;
  z-index: 1000;
}
.skip-link:focus {
  left: 0;
  top: 0;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border);
  background: rgba(250, 250, 250, 0.98);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  margin-right: auto;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }

.nav-links {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav-links::-webkit-scrollbar { display: none; }

.nav-links a {
  display: inline-block;
  white-space: nowrap;
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 8px 12px;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(46, 196, 182, 0.14);
  color: var(--color-accent-text);
  text-decoration: none;
}

.nav-links a.is-active {
  background: var(--color-primary);
  color: #fff;
}

.lang-toggle {
  flex-shrink: 0;
  border: 1.5px solid var(--color-primary);
  background: transparent;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.lang-toggle:hover, .lang-toggle:focus-visible {
  background: var(--color-primary);
  color: #fff;
}

@media (max-width: 640px) {
  .nav-links { gap: 0; }
  .nav-links a { padding: 8px 10px; font-size: 0.85rem; }
  .brand { font-size: 1.15rem; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 56px;
  overflow: hidden;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}

.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;
}

.hero-mark {
  width: min(440px, 88vw);
  margin-bottom: 12px;
}
.hero-mark svg { width: 100%; height: auto; }

.hero-tagline {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  color: var(--color-text);
  max-width: 560px;
  margin-bottom: 1.4em;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(46, 196, 182, 0.12);
  border: 1px solid rgba(46, 196, 182, 0.45);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 9px 18px;
  border-radius: 999px;
  margin-bottom: 1.6em;
}
.hero-badge svg { flex-shrink: 0; color: var(--color-accent-text); }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { box-shadow: var(--shadow-md); }

.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: #fff; }

.mono-draw {
  animation: mono-draw-line 0.55s ease forwards;
}
.mono-dot {
  opacity: 0;
  transform-origin: center;
  transform: scale(0);
  animation: mono-pop 0.4s ease forwards;
}
@keyframes mono-draw-line {
  to { stroke-dashoffset: 0; }
}
@keyframes mono-pop {
  to { opacity: 1; transform: scale(1); }
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  max-width: 780px;
}

.about-bio { font-size: 1.08rem; }

.credential-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 600;
  color: var(--color-primary);
  width: fit-content;
}
.credential-badge svg { flex-shrink: 0; color: var(--color-accent-text); }

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: start;
  gap: 22px;
  margin-top: 40px;
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.service-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 0.9em;
  padding-bottom: 0.7em;
  border-bottom: 2px solid var(--color-accent-fill);
}

.service-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(46, 196, 182, 0.14);
  border-radius: 10px;
  color: var(--color-accent-text);
}

.service-card h3 {
  font-size: 1.08rem;
  margin-bottom: 0;
}

.service-card ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 0.55em;
  font-size: 0.95rem;
}
.service-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent-fill);
}

/* ---------- Why W.E. ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
  margin-top: 40px;
}

.why-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--color-accent-fill);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.why-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.why-card .why-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(46, 196, 182, 0.14);
  border-radius: 12px;
  color: var(--color-accent-text);
  margin-bottom: 16px;
}

.why-card h3 { font-size: 1.05rem; margin-bottom: 0.5em; }
.why-card p { font-size: 0.94rem; color: var(--color-text-muted); margin: 0; }

/* ---------- Process ---------- */
.process-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 36px 0 28px;
}

.process-tab {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.process-tab.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.process-viewport {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  /* On the static viewport, not the translated track: iOS Safari keeps
     touch-action hit regions at a transformed element's untranslated position. */
  touch-action: pan-y;
}

.process-track {
  display: flex;
  align-items: flex-start;
  transition: transform 0.35s ease, height 0.3s ease;
}
.process-track.is-dragging { transition: none; }

.process-panel {
  flex: 0 0 100%;
  max-width: 100%;
  padding: 28px;
}

/* ---- Process flow content (native HTML, replaces static diagrams) ---- */
.flow-intro { text-align: center; max-width: 620px; margin: 0 auto 22px; }
.flow-intro h3 { font-size: 1.15rem; margin-bottom: 0.4em; }
.flow-intro p { color: var(--color-text-muted); font-size: 0.92rem; margin: 0; }

.flow-phases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.flow-phase-card {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 18px;
  background: var(--color-bg);
}
.flow-phase-card h4 { font-size: 0.98rem; margin-bottom: 0.6em; }
.flow-phase-card > p { font-size: 0.85rem; color: var(--color-text-muted); margin: 0 0 10px; }

.flow-mini-flow {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-accent-text);
  margin-bottom: 10px;
}
.flow-mini-flow span[aria-hidden] { color: var(--color-text-muted); font-weight: 400; }

.flow-out {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(46, 196, 182, 0.14);
  color: var(--color-primary);
  padding: 7px 10px;
  border-radius: 8px;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.flow-step {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px;
  background: var(--color-surface);
}

.flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  margin-bottom: 10px;
}

.flow-step h4 { font-size: 0.92rem; margin-bottom: 0.4em; }
.flow-step p { font-size: 0.82rem; color: var(--color-text-muted); margin: 0; }
.flow-step .flow-io { margin-top: 6px; }
.flow-io { font-size: 0.8rem; }

.flow-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.flow-chip {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.8rem;
  padding: 7px 14px;
  border-radius: 999px;
}
.flow-chip--solid {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.flow-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: 16px;
  text-align: center;
}

.process-nav {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 20px;
}

.process-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}
.process-arrow:hover { background: var(--color-bg); box-shadow: var(--shadow-md); transform: translateY(-1px); }

/* ---------- Expertise ---------- */
.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 36px 0;
}

.stat-tile {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}
.stat-tile .stat-number {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 800;
  display: block;
  color: var(--color-accent-fill);
}
.stat-tile .stat-label { font-size: 0.95rem; margin-top: 6px; }

.expertise-block { margin-top: 36px; }
.expertise-block h3 { font-size: 1.05rem; margin-bottom: 0.8em; }

.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }

.tag-pill {
  background: rgba(46, 196, 182, 0.14);
  color: var(--color-accent-text);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 8px 16px;
  border-radius: 999px;
}

/* ---------- Share / News ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.news-empty { color: var(--color-text-muted); grid-column: 1 / -1; }

.news-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.news-card-tag {
  align-self: flex-start;
  background: rgba(46, 196, 182, 0.14);
  color: var(--color-accent-text);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  padding: 4px 12px;
  border-radius: 999px;
}

.news-card-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.45;
  margin: 0;
}

.news-card-meta {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.news-card-summary {
  font-size: 0.92rem;
  color: var(--color-text);
  margin: 0;
  flex-grow: 1;
}

.news-card-link {
  font-size: 0.88rem;
  font-weight: 700;
}

/* ---------- Contact ---------- */
.contact-card {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent-fill);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 32px 40px;
  max-width: 880px;
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 40px;
}
.contact-card a { color: var(--color-primary); font-weight: 700; }
.contact-card a:hover { color: var(--color-accent-text); }
.contact-brand {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.contact-logo { display: block; width: 150px; height: auto; }
.contact-brand-tagline {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--color-primary);
}
.contact-links {
  flex: 1;
  min-width: 0;
  padding-left: 40px;
  border-left: 1px solid var(--color-border);
}

.contact-row {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 1.05rem;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}
.contact-row:last-child { border-bottom: none; }
.contact-row .icon { flex-shrink: 0; width: 22px; height: 22px; color: var(--color-accent-text); }
.contact-qr {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.contact-qr img { display: block; border: 1px solid var(--color-border); border-radius: 6px; }

@media (max-width: 720px) {
  .contact-card { flex-direction: column; align-items: flex-start; gap: 20px; padding: 28px 24px; }
  .contact-links { padding-left: 0; border-left: none; width: 100%; }
  .contact-qr { display: none; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.75);
  text-align: center;
  padding: 32px 24px;
  font-size: 0.88rem;
}
.site-footer a { color: rgba(255,255,255,0.9); }.site-footer p { margin: 0 0 6px; }
.site-footer p:last-child { margin-bottom: 0; }

/* ---------- Utility: language visibility ---------- */
[hidden] { display: none !important; }