/* ======================================
   MOBVOI COMMUNITY FORUM REBUILD — mobvoi-forum.css
   Theme blue: #3B4ACC
   ====================================== */

:root {
  --mf-blue:       #3B4ACC;
  --mf-blue-dark:  rgba(36,  38,  128, 0.85);
  --mf-blue-steel: rgba(147, 172, 191, 0.85);
  --mf-blue-mid:   rgba(54,  81,  175, 0.85);
  --mf-blue-light: rgba(132, 144, 162, 0.85);
}

/* ── Page base ── */
.mf-page {
  background: white;
  color: #1a1a1a;
}

/* ── Header: black by default, white over dark sections ── */
.mf-page .logo img { filter: invert(1); transition: filter 0.45s ease; }
.mf-page .nav a { color: #1a1a1a; }
.mf-page .nav a:hover { background-size: 100% 1px; }
.mf-page .nav a.active { font-weight: 700; }
/* Inverted: white text over dark sections */
.mf-page .header--inverted .logo img { filter: invert(0); }
.mf-page .header--inverted .nav a   { color: #ffffff; }
.mf-page .header--inverted .nav a:hover { background-size: 100% 1px; }

/* ══════════════════════════════════════
   ① HERO
   ══════════════════════════════════════ */
.mf-hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  background: var(--mf-blue);
  overflow: hidden;
}

.mf-hero-mockup {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64%;
}
.mf-hero-mockup img {
  width: 100%;
  height: auto;
  display: block;
}

.mf-hero-text {
  position: absolute;
  right: 5%;
  top: 0;
  bottom: 0;
  width: 34%;
  text-align: right;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.mf-hero-text h1 {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 700;
  color: white;
  line-height: 1.2;
  margin: 0;
}

/* ══════════════════════════════════════
   SHARED SECTION STYLES
   ══════════════════════════════════════ */
.mf-section {
  background: white;
  padding: 60px 120px;
  margin-top: 100px;
}

.mf-section-title {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 600;
  color: #2c2c2c;
  margin: 0 0 20px;
  line-height: 1.2;
}

.mf-body {
  font-family: var(--font-text);
  font-size: 14px;
  line-height: 1.75;
  color: #444444;
  margin: 0 0 14px;
}
.mf-body:last-child { margin-bottom: 0; }

.mf-bullet-list {
  list-style: disc;
  padding-left: 18px;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mf-bullet-list li {
  font-family: var(--font-text);
  font-size: 14px;
  line-height: 1.75;
  color: #444444;
}

/* ══════════════════════════════════════
   ② PROJECT OVERVIEW (3 columns)
   ══════════════════════════════════════ */
.mf-overview-section {
  margin-top: 0;
  padding-top: 150px;
  padding-bottom: 150px;
}

.mf-overview-grid {
  display: flex;
  gap: 48px;
}

.mf-overview-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.mf-overview-header {
  background: var(--mf-blue);
  padding: 16px 16px 20px;
  min-height: 130px;
  display: flex;
  align-items: flex-end;
}

.mf-overview-title {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
  line-height: 1.15;
}

/* ══════════════════════════════════════
   ③ GOAL & CHALLENGE (Venn circles)
   ══════════════════════════════════════ */
.mf-gc-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 0;
  padding-top: 40px;
  padding-bottom: 40px;
}

.mf-gc-row {
  display: flex;
  align-items: center;
  padding: 0 120px;
  gap: 0;
}

.mf-gc-label {
  flex: 0 0 420px;
}

.mf-gc-label-text {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 600;
  color: #2c2c2c;
  margin: 0;
  line-height: 1.2;
}

.mf-gc-circles {
  display: flex;
  align-items: center;
  flex: 1; /* take remaining space so both rows are equal width */
}

.mf-circle {
  flex: 1;           /* equal width within each row */
  height: 300px;
  border-radius: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 40px;
}

/* Overlap adjacent pills */
.mf-circle + .mf-circle {
  margin-left: -48px;
}

.mf-circle--dark  { background: var(--mf-blue-dark);  z-index: 2; }
.mf-circle--steel { background: var(--mf-blue-steel); z-index: 1; }
.mf-circle--mid   { background: var(--mf-blue-mid);   z-index: 2; }
.mf-circle--light { background: var(--mf-blue-light); z-index: 1; }

.mf-circle-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: white;
  margin: 0 0 8px;
  line-height: 1.45;
}

.mf-circle-sub {
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.82);
  margin: 0;
  line-height: 1.5;
}

/* ══════════════════════════════════════
   ④ SPLIT SECTION (text left 4 : image right 6)
   ══════════════════════════════════════ */
.mf-split-section {
  display: flex;
  gap: 40px;
  align-items: center;
}

.mf-split-left  { flex: 4; }
.mf-split-right { flex: 6; }
.mf-split-right img {
  width: 100%;
  height: auto;
  display: block;
}

/* ══════════════════════════════════════
   ⑤⑥ STACKED SECTIONS (split top + full-width bottom)
   ══════════════════════════════════════ */
.mf-stacked-section {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding-bottom: 50px;
}

.mf-split-top {
  display: flex;
  gap: 40px;
  align-items: center;
}
.mf-split-top .mf-split-left  { flex: 4; }
.mf-split-top .mf-split-right { flex: 6; }
.mf-split-top .mf-split-right img {
  width: 100%;
  height: auto;
  display: block;
}

/* Bottom image — stays within section padding */
.mf-full-img {
  margin: 0;
}
.mf-full-img img {
  width: 100%;
  height: auto;
  display: block;
}

/* ══════════════════════════════════════
   ⑦ CONTENT STRATEGY
   ══════════════════════════════════════ */
.mf-content-section {
  display: flex;
  gap: 40px;
  align-items: center;
  overflow: hidden;
}

.mf-content-left  { flex: 4; }
.mf-content-right { flex: 6; overflow: hidden; }
.mf-content-right img {
  width: 100%;
  height: auto;
  display: block;
}

/* ══════════════════════════════════════
   ⑧ UI DETAILS — title + Before | text | After
   Figma col widths: Before 305 | Text 335 | After 588
   ══════════════════════════════════════ */
.mf-uidetails-section {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mf-uidetails-layout {
  display: flex;
  gap: 36px;
  align-items: flex-start;
}

.mf-uidetails-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.mf-uidetails-col img {
  width: 100%;
  height: auto;
  display: block;
}

.mf-uidetails-before { flex: 305; }
.mf-uidetails-after  { flex: 588; }

.mf-uidetails-label {
  font-family: var(--font-text);
  font-size: 13px;
  color: #888888;
  margin: 0;
  text-align: center;
}

.mf-uidetails-text {
  flex: 335;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-top: 46px; /* offset to align with image tops */
}

.mf-uidetails-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.mf-uidetails-num {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: rgba(0, 0, 0, 0.6);
  line-height: 1.3;
  flex-shrink: 0;
  width: 20px;
}

.mf-uidetails-item .mf-body { margin: 0; }

/* ══════════════════════════════════════
   ⑨ OUTPUT
   ══════════════════════════════════════ */
.mf-output-section {
  background: var(--mf-blue);
  margin-top: 100px;
  padding: 60px 40px 60px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mf-output-img img {
  width: 100%;
  height: auto;
  display: block;
}

.mf-output-label {
  padding-top: 40px;
}
.mf-output-label h2 {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 700;
  color: white;
  margin: 0;
}

/* ══════════════════════════════════════
   CAROUSEL — white background
   ══════════════════════════════════════ */
.mf-page .more-section {
  background: white;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}
.mf-page .more-heading { color: #6b6b6b; }

/* ══════════════════════════════════════
   SCROLL FADE-IN ANIMATION
   ══════════════════════════════════════ */
.mf-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.mf-animate.is-visible {
  opacity: 1;
  transform: translateY(0);
}