/* ============================================================
   弥境 Mi Jing — Core Styles
   Color Scheme: #E8532E (orange-red), #0D0D0D (black),
                 #B8A44E (khaki/duck-yellow), #F5F5F5 (text)
   ============================================================ */

/* ---- CSS Custom Properties ---- */
:root {
  --color-primary: #E8532E;
  --color-primary-rgb: 232, 83, 46;
  --color-primary-dark: #C4451F;
  --color-dark: #0D0D0D;
  --color-dark-elevated: #1a1a1a;
  --color-dark-card: #141414;
  --color-accent: #B8A44E;
  --color-accent-rgb: 184, 164, 78;
  --color-text: #F5F5F5;
  --color-text-muted: #9A9A9A;
  --color-white: #FFFFFF;

  --font-display: 'Noto Serif SC', 'Source Han Serif SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'Microsoft YaHei', -apple-system, sans-serif;

  --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --section-padding-y: clamp(4rem, 8vh, 8rem);
  --section-padding-x: clamp(1rem, 5vw, 4rem);
  --nav-height: 72px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
  scroll-snap-stop: normal;
  overflow-y: scroll;
  background: var(--color-dark);
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ---- Scroll Snap Sections ---- */
.snap-section {
  scroll-snap-align: start;
  scroll-snap-stop: always;
  min-height: 100vh;
  position: relative;
  padding: var(--section-padding-y) var(--section-padding-x);
  overflow: hidden;
  contain: layout style;
}

/* ---- Section Shared ---- */
.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-primary);
  border: 1px solid rgba(var(--color-primary-rgb), 0.3);
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 1.25rem;
  background: rgba(var(--color-primary-rgb), 0.05);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--color-white);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.9;
  margin-bottom: 1rem;
}

.section-header { margin-bottom: clamp(2rem, 4vh, 3.5rem); }

/* ---- Reveal Animation Base ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* Staggered reveals for grids */
.reveal-stagger > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger > *:nth-child(6) { transition-delay: 400ms; }

/* ================================================================
   NAVIGATION
   ================================================================ */
#mainNav {
  height: var(--nav-height);
  background: transparent;
  transition: background 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
  z-index: 1000;
}
#mainNav.nav-scrolled {
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(0,0,0,0.5);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.brand-icon svg { display: block; }
.brand-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
}
.brand-sub {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: 1px;
}

.navbar-nav .nav-link {
  color: var(--color-text-muted) !important;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  transition: color var(--transition-base);
  position: relative;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--color-primary) !important;
}
.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}
.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}
.nav-link-download {
  color: var(--color-primary) !important;
  font-weight: 600 !important;
}

.navbar-toggler {
  border-color: rgba(255,255,255,0.2);
}
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0;
}
.lang-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 8px;
  transition: color var(--transition-base);
}
.lang-btn.active { color: var(--color-primary); }
.lang-btn:hover { color: var(--color-white); }
.lang-divider {
  color: rgba(255,255,255,0.2);
  font-size: 0.9rem;
  user-select: none;
}

/* Nav Dots (right side) */
.nav-dots {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.nav-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  display: block;
}
.nav-dot:hover,
.nav-dot.active {
  background: var(--color-primary);
  box-shadow: 0 0 10px rgba(var(--color-primary-rgb), 0.6);
  transform: scale(1.3);
}

@media (max-width: 991.98px) {
  .nav-dots { display: none; }
  #mainNav.nav-scrolled { background: rgba(13,13,13,0.95); }
}

/* ================================================================
   SECTION 1: HERO
   ================================================================ */
.hero-section {
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.hero-carousel {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
  background-size: cover !important;
  background-position: center !important;
}
.hero-slide.active { opacity: 1; }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(13,13,13,0.6) 0%,
    rgba(13,13,13,0.4) 40%,
    rgba(13,13,13,0.75) 100%
  );
  z-index: 1;
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 800px;
  padding: 0 1.5rem;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--color-primary);
  border: 1px solid rgba(var(--color-primary-rgb), 0.35);
  padding: 6px 20px;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  background: rgba(0,0,0,0.3);
}

.hero-title-main {
  font-family: var(--font-display);
  font-size: clamp(4rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-white);
  display: block;
  background: linear-gradient(180deg, #fff 0%, #ccc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 400;
  color: var(--color-text-muted);
  margin: 0.5rem 0 1rem;
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  opacity: 0.8;
}

.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn-outline-hero {
  border: 1.5px solid rgba(255,255,255,0.4);
  color: var(--color-white);
  padding: 12px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-base);
  text-decoration: none;
  display: inline-block;
}
.btn-outline-hero:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
  color: var(--color-white);
}

.btn-hero-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  padding: 12px 36px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-base);
  text-decoration: none;
  display: inline-block;
}
.btn-hero-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(var(--color-primary-rgb), 0.4);
}

/* Hero Progress Bar */
.hero-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255,255,255,0.1);
  z-index: 4;
}
.hero-progress-bar {
  height: 100%;
  background: var(--color-primary);
  width: 0%;
}
.hero-progress-bar.animating {
  animation: progress-tick 5s linear forwards;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0.6;
  animation: scroll-bounce 2s ease-in-out infinite;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ================================================================
   SECTION 2: OVERVIEW
   ================================================================ */
.overview-section {
  background: var(--color-dark);
}

.overview-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 20px;
  margin-top: 1.5rem;
}
.highlight-item {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.highlight-icon {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1rem;
}

/* Visual Card Stack */
.overview-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 320px;
}
.visual-card-stack {
  position: relative;
  width: 260px;
  height: 320px;
}
.visual-card {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.1);
  background: var(--color-dark-elevated);
}
.vc-back {
  transform: rotate(-6deg) translateX(-15px);
  background: linear-gradient(135deg, #1a1a1a, #111);
}
.vc-mid {
  transform: rotate(-3deg) translateX(-8px);
  background: linear-gradient(135deg, #1f1f1f, #161616);
}
.vc-front {
  transform: rotate(0deg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #222, #1a1a1a);
  border-color: rgba(var(--color-primary-rgb), 0.3);
}
.vc-content {
  text-align: center;
}
.vc-label {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* Stats Row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: clamp(2rem, 5vh, 4rem);
}
.stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--color-dark-card);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.05);
  transition: all var(--transition-base);
}
.stat-card:hover {
  border-color: rgba(var(--color-primary-rgb), 0.2);
  transform: translateY(-4px);
}
.stat-number {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--color-primary);
}
.stat-suffix {
  font-size: 1.2rem;
  color: var(--color-primary);
}
.stat-icon-text {
  color: var(--color-accent) !important;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

@media (max-width: 767.98px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .overview-highlights { grid-template-columns: 1fr; }
}

/* ================================================================
   SECTION 3: FEATURES
   ================================================================ */
.features-section {
  background: var(--color-dark-elevated);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-dark-card);
  border-radius: 14px;
  padding: 2rem;
  border: 1px solid rgba(255,255,255,0.05);
  border-top: 3px solid transparent;
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.35s ease,
              border-color 0.35s ease;
  cursor: default;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-top-color: var(--color-primary);
  box-shadow: 0 20px 50px rgba(var(--color-primary-rgb), 0.12);
}

.feature-icon {
  margin-bottom: 1.25rem;
}
.feature-icon svg { display: block; }

.feature-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}
.feature-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
}

@media (max-width: 1199.98px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767.98px) {
  .features-grid { grid-template-columns: 1fr; }
}

/* ================================================================
   SECTION 4: SIMULATION TEACHING
   ================================================================ */
.simulation-section {
  background: var(--color-dark);
  padding-left: 0;
  padding-right: 0;
}

/* Marquee Bands */
.marquee-band {
  width: 100%;
  overflow: hidden;
  padding: 1.2rem 0;
  position: relative;
}
.marquee-left { background: rgba(var(--color-primary-rgb), 0.08); }
.marquee-right { background: rgba(var(--color-accent-rgb), 0.06); }

.marquee-track {
  display: flex;
  white-space: nowrap;
  will-change: transform;
  gap: 0;
}
.marquee-track span {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 2px;
  flex-shrink: 0;
}
.marquee-left .marquee-track span { color: rgba(var(--color-primary-rgb), 0.6); }
.marquee-right .marquee-track span { color: rgba(var(--color-accent-rgb), 0.7); }

.marquee-left .marquee-track {
  animation: marquee-left 30s linear infinite;
}
.marquee-right .marquee-track {
  animation: marquee-right 25s linear infinite;
}
.marquee-track:hover {
  animation-play-state: paused;
}

/* Sim Split Rows */
.sim-split {
  display: flex;
  align-items: center;
  gap: 3rem;
  padding: 2rem var(--section-padding-x);
}
.sim-split-reverse { flex-direction: row-reverse; }

.sim-split-img { flex: 1; }
.sim-split-text { flex: 1; }

.sim-img-placeholder {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
  position: relative;
}
.sim-img-content {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-muted);
}
.sim-img-content video,
.sim-img-content img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
}
.sim-img-content svg {
  flex-shrink: 0;
}
.sim-img-content span {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--color-text-muted);
}

.sim-split-text h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1rem;
}
.sim-split-text p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* Sim Tiles */
.sim-tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 0 var(--section-padding-x);
  margin-top: 1rem;
}
.sim-tile {
  background: var(--color-dark-card);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.05);
  transition: transform var(--transition-base);
}
.sim-tile:hover { transform: translateY(-4px); }
.sim-tile-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.sim-tile h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}
.sim-tile p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

@media (max-width: 991.98px) {
  .sim-split, .sim-split-reverse { flex-direction: column; gap: 1.5rem; }
  .sim-tiles { grid-template-columns: 1fr; }
}
@media (max-width: 767.98px) {
  .sim-split { padding: 1.5rem 1rem; }
  .sim-tiles { padding: 0 1rem; }
}

/* ================================================================
   SECTION 5: KNOWLEDGE & ASSESSMENT
   ================================================================ */
.knowledge-section {
  background: var(--color-dark-elevated);
}

.knowledge-card {
  background: var(--color-dark-card);
  border-radius: 14px;
  padding: 2rem;
  border: 1px solid rgba(255,255,255,0.05);
  height: 100%;
  transition: transform var(--transition-base);
}
.knowledge-card:hover { transform: translateY(-4px); }

.knowledge-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1.5rem;
}
.knowledge-card-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  margin: 0;
}

.knowledge-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}
.knowledge-list li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.knowledge-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.assessment-list li::before {
  background: var(--color-primary);
}

.knowledge-search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  cursor: text;
}

.score-ring-container {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
}
.score-ring-progress {
  transition: stroke-dashoffset 1.5s ease;
}

/* ================================================================
   SECTION 6: PLATFORM ECOSYSTEM
   ================================================================ */
.platform-section {
  background: var(--color-dark);
}

.platform-cards { margin-bottom: 1.5rem; }

.platform-card {
  text-align: center;
  padding: 0;
  background: var(--color-dark-card);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.05);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  height: 100%;
}
.platform-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.platform-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-white);
  margin: 1rem 1.5rem 0.5rem;
}
.platform-card > p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0 1.5rem 1.5rem;
}

/* Phone Mockup */
.platform-mockup {
  padding: 1.5rem;
  display: flex;
  justify-content: center;
}
.phone-mockup {
  width: 160px;
  height: 280px;
  border-radius: 24px;
  border: 3px solid rgba(255,255,255,0.15);
  background: var(--color-dark);
  position: relative;
  overflow: hidden;
}
.phone-notch {
  width: 60px;
  height: 6px;
  background: rgba(255,255,255,0.3);
  border-radius: 3px;
  margin: 10px auto 0;
}
.phone-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: calc(100% - 30px);
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

/* Desktop Mockup */
.desktop-mockup {
  width: 220px;
  height: 160px;
  border-radius: 10px;
  border: 2px solid rgba(255,255,255,0.15);
  background: var(--color-dark);
  overflow: hidden;
}
.desktop-toolbar {
  padding: 8px 12px;
  display: flex;
  gap: 6px;
  background: rgba(255,255,255,0.05);
}
.dt-dot { width: 10px; height: 10px; border-radius: 50%; }
.dt-red { background: #E8532E; }
.dt-yellow { background: #B8A44E; }
.dt-green { background: #4CAF50; }
.desktop-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: calc(100% - 30px);
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

/* Platform QR */
.platform-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-bottom: 1rem;
}
.qr-placeholder {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  overflow: hidden;
  opacity: 0.7;
}
.platform-qr span {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Platform Badges */
.platform-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 0 1.5rem 1.5rem;
}
.platform-badge {
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 50px;
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
}

/* Network Callout */
.network-callout {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
}
.network-callout-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(var(--color-accent-rgb), 0.06);
  border: 1px solid rgba(var(--color-accent-rgb), 0.15);
  border-radius: 50px;
  padding: 12px 28px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ================================================================
   SECTION 7: DOWNLOAD
   ================================================================ */
.download-section {
  background: var(--color-dark-elevated);
  position: relative;
}

.download-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--color-primary-rgb), 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.download-title {
  font-size: clamp(2rem, 4vw, 3rem);
}
.section-badge-download {
  background: rgba(var(--color-primary-rgb), 0.1);
  border-color: rgba(var(--color-primary-rgb), 0.4);
}

.download-version { margin-top: 0.5rem; }
.version-badge {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  background: rgba(255,255,255,0.04);
  padding: 6px 16px;
  border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.08);
}

/* Download Cards */
.download-cards {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1.5rem;
  max-width: 900px;
  margin: 2rem auto 0;
}

.download-card {
  background: var(--color-dark-card);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition-base);
  position: relative;
}
.download-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.download-card-main {
  border-color: rgba(var(--color-primary-rgb), 0.3);
  background: linear-gradient(135deg, #1f1512, var(--color-dark-card));
}

.download-card-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 50px;
  white-space: nowrap;
}

.download-card-icon { margin-bottom: 1rem; }
.download-card-icon svg { display: block; margin: 0 auto; }

.download-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}
.download-card-size {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}
.download-card-req {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.btn-download {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  border: none;
  padding: 12px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  animation: download-pulse 2.5s ease-in-out infinite;
}
.btn-download:hover {
  background: var(--color-primary-dark);
  color: white;
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(var(--color-primary-rgb), 0.5);
  animation: none;
}
.btn-download-secondary {
  display: inline-block;
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.3);
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
}
.btn-download-secondary:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.6);
  color: white;
}
.disabled-btn {
  opacity: 0.4;
  pointer-events: none;
}

/* System Requirements */
.requirements-wrapper {
  max-width: 700px;
  margin: 2rem auto 0;
}
.requirements-details {
  background: var(--color-dark-card);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}
.requirements-details summary {
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
  user-select: none;
}
.requirements-details summary:hover { color: var(--color-white); }
.req-content {
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.req-content h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}
.req-content ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.req-content li {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  padding: 0.3rem 0;
  padding-left: 1rem;
  position: relative;
}
.req-content li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
  font-size: 0.7rem;
}

@media (max-width: 767.98px) {
  .download-cards { grid-template-columns: 1fr; }
}

/* ================================================================
   SECTION 8: PARTNERS
   ================================================================ */
.partners-section {
  background: var(--color-dark);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.partner-logo {
  display: flex;
  align-items: stretch;
  justify-content: center;
}
.partner-placeholder {
  width: 100%;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
  text-align: center;
  background: var(--color-dark-card);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.05);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  transition: all var(--transition-base);
  filter: grayscale(100%);
  opacity: 0.5;
}
.partner-placeholder img {
  max-width: 100%;
  max-height: 72px;
  object-fit: contain;
  display: block;
}
.partner-placeholder:hover {
  filter: grayscale(0%);
  opacity: 1;
  border-color: rgba(var(--color-primary-rgb), 0.2);
  color: var(--color-white);
}

.certifications {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 3rem;
}
.cert-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--color-accent);
}

@media (max-width: 991.98px) {
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ================================================================
   FOOTER
   ================================================================ */
.site-footer {
  background: #090909;
  padding: 4rem 1rem 2rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  scroll-snap-align: none;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 1rem;
}
.footer-logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-white);
}
.footer-logo-sub {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 2px;
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 1rem;
}
.social-link {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}
.social-link:hover {
  background: rgba(255,255,255,0.1);
}

.site-footer h5 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 1rem;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 0.5rem;
}
.footer-links a,
.footer-links span {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}
.footer-links a:hover { color: var(--color-primary); }

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  text-align: center;
}
.footer-bottom p {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin: 0.2rem 0;
}
.footer-icp {
  opacity: 0.5;
}

/* ================================================================
   RESPONSIVE BREAKPOINTS
   ================================================================ */
@media (max-width: 767.98px) {
  .snap-section {
    scroll-snap-align: start;
    min-height: auto;
    padding-top: 4rem;
    padding-bottom: 4rem;
  }
  .hero-section { min-height: 100vh; }
  .section-title { font-size: 1.5rem; }

  .hero-title-main { font-size: 3.5rem; }
  .hero-content { padding: 0 1rem; }
  .hero-cta { flex-direction: column; align-items: center; }

  .certifications { flex-direction: column; align-items: center; }
}