/* ============================================================
   PowerMatrix Design System — main.css
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

/* ── Design Tokens ────────────────────────────────────────── */
:root {
  /* Colors */
  --bg-primary:     #07090e;
  --bg-secondary:   #0d1117;
  --bg-tertiary:    #111827;
  --bg-card:        rgba(255, 255, 255, 0.035);
  --bg-card-hover:  rgba(255, 255, 255, 0.065);

  --accent-green:   #00e87a;
  --accent-green-2: #00c86a;
  --accent-green-dim: rgba(0, 232, 122, 0.15);
  --accent-gold:    #d4a847;
  --accent-amber:   #f59e0b;
  --accent-cyan:    #22d3ee;
  --accent-geo-red: #ff2442;
  --accent-geo-teal:#00f2ea;

  --text-primary:   #f0f4f8;
  --text-secondary: #8b95a1;
  --text-muted:     #4b5563;
  --text-green:     #00e87a;

  --border:         rgba(255, 255, 255, 0.07);
  --border-green:   rgba(0, 232, 122, 0.25);
  --border-gold:    rgba(212, 168, 71, 0.3);

  /* Spacing */
  --max-width: 1200px;
  --section-padding: 120px 0;

  /* Typography */
  --font-main: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  --font-cn:   'Noto Sans SC', 'Inter', sans-serif;

  /* Shadows */
  --shadow-green: 0 0 40px rgba(0, 232, 122, 0.2);
  --shadow-card:  0 8px 48px rgba(0, 0, 0, 0.5);

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

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

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-green-dim); }

/* ── Utility Classes ──────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.section {
  padding: var(--section-padding);
  position: relative;
}

.overline {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-green);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.overline::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent-green);
}

.section-title {
  font-family: var(--font-cn);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 640px;
}

/* ── Glass Card ───────────────────────────────────────────── */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.glass:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-green);
  box-shadow: 0 0 30px rgba(0, 232, 122, 0.08);
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: var(--accent-green);
  color: #07090e;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 232, 122, 0.4);
}

.btn-primary:hover::before { opacity: 1; }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  transform: translateY(-2px);
  background: var(--accent-green-dim);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 10px 20px;
  font-size: 14px;
}

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-green);
}

/* ── Entrance Animations ──────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.8s var(--ease-out);
}

.fade-in.visible { opacity: 1; }

/* Staggered children */
.stagger > * { animation: none; }
.stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger.visible > *:nth-child(3) { transition-delay: 0.2s; }
.stagger.visible > *:nth-child(4) { transition-delay: 0.3s; }
.stagger.visible > *:nth-child(5) { transition-delay: 0.4s; }

/* ── Noise texture overlay ────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1000;
  opacity: 0.4;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  padding: 20px 0;
  transition: all 0.4s var(--ease-out);
}

#navbar.scrolled {
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-main);
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo .logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 4px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-menu a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
  font-family: var(--font-cn);
}

.nav-menu a:hover { color: var(--text-primary); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  transition: all 0.3s;
}

/* ============================================================
   S1 — HERO
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 140px 40px 80px;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,232,122,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,232,122,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 232, 122, 0.08);
  border: 1px solid rgba(0, 232, 122, 0.2);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-green);
  letter-spacing: 1px;
  margin-bottom: 40px;
  font-family: var(--font-cn);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-h1 {
  font-family: var(--font-cn);
  font-size: clamp(52px, 7vw, 88px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-h1 .highlight {
  background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-h2 {
  font-family: var(--font-cn);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: -0.5px;
  margin-bottom: 36px;
}

.hero-body {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 16px;
  font-family: var(--font-cn);
  text-align: center;
}

.hero-body-en {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 48px;
  text-transform: uppercase;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
  animation: float-scroll 3s ease-in-out infinite;
}

@keyframes float-scroll {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
  50% { transform: translateX(-50%) translateY(6px); opacity: 1; }
}

.hero-scroll span {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent-green), transparent);
}

/* ============================================================
   S2 — INTERACTION REVOLUTION
   ============================================================ */
#revolution {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.revolution-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 64px;
}

.revolution-left, .revolution-right {
  position: relative;
}

/* Old paradigm — crossed terminal */
.terminal-old {
  background: #0a0a0a;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 24px;
  position: relative;
  overflow: hidden;
  opacity: 0.6;
}

.terminal-old::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 8px,
    rgba(255, 50, 50, 0.04) 8px,
    rgba(255, 50, 50, 0.04) 10px
  );
  border-radius: 12px;
}

.terminal-old .slash-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.slash-line {
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 75, 75, 0.7), transparent);
  transform: rotate(-8deg);
  position: relative;
}

.slash-line::before {
  content: '过时';
  position: absolute;
  top: -20px;
  right: 0;
  font-size: 10px;
  letter-spacing: 2px;
  color: rgba(255, 75, 75, 0.7);
  text-transform: uppercase;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.t-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.t-dot-r { background: #ff5f57; }
.t-dot-y { background: #ffbd2e; }
.t-dot-g { background: #28c840; }

.terminal-code {
  font-family: 'Courier New', monospace;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.6;
}

.terminal-code .cmd { color: #4b8b6b; }
.terminal-code .arg { color: #6b7c93; }
.terminal-code .err { color: rgba(255, 80, 80, 0.6); }

.paradigm-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-align: center;
  margin-top: 16px;
}

.label-old { color: rgba(255, 80, 80, 0.5); text-decoration: line-through; }
.label-new { color: var(--accent-green); }

/* New paradigm — WeChat chat */
.wechat-mock {
  background: #f0f0f0;
  border-radius: 20px;
  overflow: hidden;
  font-family: var(--font-cn);
}

.wechat-header {
  background: #ededed;
  padding: 12px 20px;
  text-align: center;
  font-size: 13px;
  color: #666;
  font-weight: 500;
  border-bottom: 1px solid #ddd;
}

.wechat-body {
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 220px;
  background: #f0f0f0;
}

.msg-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

.msg-row.right {
  flex-direction: row-reverse;
}

.msg-avatar {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: linear-gradient(135deg, #1976d2, #1565c0);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.msg-avatar.ai {
  background: linear-gradient(135deg, var(--accent-green), #00a855);
  color: #07090e;
}

.msg-bubble {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  max-width: 75%;
  line-height: 1.5;
  color: #222;
}

.msg-row:not(.right) .msg-bubble {
  background: white;
  border-radius: 2px 12px 12px 12px;
}

.msg-row.right .msg-bubble {
  background: #95ec69;
  border-radius: 12px 2px 12px 12px;
}

.msg-status {
  font-size: 11px;
  color: var(--accent-green);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.pulse-ring {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 1.5s ease-in-out infinite;
}

/* Three highlights */
.highlights-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-top: 64px;
}

.highlight-card {
  padding: 24px;
  border-radius: 12px;
  transition: all 0.3s var(--ease-out);
}

.highlight-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-green-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 16px;
}

.highlight-title {
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.highlight-body {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  font-family: var(--font-cn);
}

/* ============================================================
   S3 — CAPABILITY GENOME
   ============================================================ */
#skills {
  background: var(--bg-secondary);
}

#skills::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-green), transparent);
}

.skills-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.skills-header .section-body {
  margin: 0 auto;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.skill-card {
  padding: 32px 24px;
  border-radius: 16px;
  transition: all 0.35s var(--ease-out);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 70%, rgba(0,232,122,0.04));
  border-radius: 16px;
  opacity: 0;
  transition: opacity 0.3s;
}

.skill-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-green);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 232, 122, 0.1);
}

.skill-card:hover::before { opacity: 1; }

.skill-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.skill-icon-1 { background: rgba(0, 232, 122, 0.1); }
.skill-icon-2 { background: rgba(34, 211, 238, 0.1); }
.skill-icon-3 { background: rgba(212, 168, 71, 0.1); }
.skill-icon-4 { background: linear-gradient(135deg, rgba(255, 36, 66, 0.12), rgba(0, 242, 234, 0.12)); }

.skill-number {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.skill-name {
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.skill-desc {
  font-family: var(--font-cn);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  position: relative;
  z-index: 1;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  position: relative;
  z-index: 1;
}

.tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(255, 36, 66, 0.12);
  border: 1px solid rgba(255, 36, 66, 0.2);
  font-family: var(--font-cn);
}

.tag-red { color: var(--accent-geo-red); border-color: rgba(255, 36, 66, 0.25); background: rgba(255, 36, 66, 0.08); }
.tag-teal { color: var(--accent-geo-teal); border-color: rgba(0, 242, 234, 0.25); background: rgba(0, 242, 234, 0.08); }
.tag-neutral { color: var(--text-muted); border-color: var(--border); background: transparent; }

/* GEO Banner */
.geo-banner {
  border-radius: 16px;
  padding: 32px 40px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 36, 66, 0.2);
  background: linear-gradient(135deg,
    rgba(255, 36, 66, 0.06) 0%,
    rgba(7, 9, 14, 0.9) 40%,
    rgba(0, 242, 234, 0.06) 100%
  );
}

.geo-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 36, 66, 0.12) 0%, transparent 70%);
}

.geo-banner::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 242, 234, 0.1) 0%, transparent 70%);
}

.geo-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  position: relative;
  z-index: 1;
}

.geo-hot-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #ff2442;
  background: rgba(255, 36, 66, 0.1);
  border: 1px solid rgba(255, 36, 66, 0.25);
  margin-bottom: 12px;
  font-family: var(--font-cn);
}

.geo-title {
  font-family: var(--font-cn);
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.geo-desc {
  font-family: var(--font-cn);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 520px;
}

.skills-cta {
  text-align: center;
  margin-top: 56px;
}

/* ============================================================
   S4 — ENTERPRISE SOLUTIONS
   ============================================================ */
#enterprise {
  background: var(--bg-primary);
  position: relative;
}

.enterprise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.enterprise-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

/* Data vault visual */
.vault-scene {
  position: relative;
  width: 280px;
  height: 280px;
}

.vault-base {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 280px;
  height: 120px;
  background: linear-gradient(180deg, #1a1f2e 0%, #0d1117 100%);
  border: 1px solid rgba(212, 168, 71, 0.2);
  border-radius: 8px;
  overflow: hidden;
}

.vault-server-row {
  display: flex;
  gap: 4px;
  padding: 6px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.server-bar {
  height: 8px;
  border-radius: 2px;
  background: rgba(255,255,255,0.06);
  flex: 1;
}

.server-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: blink-led 3s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes blink-led {
  0%, 90%, 100% { opacity: 1; }
  95% { opacity: 0.1; }
}

.vault-box {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 160px;
  height: 160px;
  border: 1px solid rgba(212, 168, 71, 0.35);
  border-radius: 16px;
  background: rgba(13, 17, 23, 0.7);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  animation: float-vault 4s ease-in-out infinite;
  box-shadow: 0 0 60px rgba(212, 168, 71, 0.1);
}

@keyframes float-vault {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-12px); }
}

.vault-icon {
  font-size: 36px;
  opacity: 0.8;
}

.vault-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent-gold);
  text-transform: uppercase;
}

.enterprise-content .section-body {
  margin-bottom: 48px;
}

.value-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.value-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.value-num {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent-green-dim);
  border: 1px solid var(--border-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  color: var(--accent-green);
  flex-shrink: 0;
  margin-top: 2px;
}

.value-text-title {
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.value-text-body {
  font-family: var(--font-cn);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ============================================================
   S5 — HARDWARE TEASER
   ============================================================ */
#hardware {
  background: linear-gradient(180deg, var(--bg-primary) 0%, #080b12 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

#hardware::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 50% 60%, rgba(0, 232, 122, 0.04) 0%, transparent 100%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 40px,
      rgba(0, 232, 122, 0.015) 40px,
      rgba(0, 232, 122, 0.015) 41px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 40px,
      rgba(0, 232, 122, 0.015) 40px,
      rgba(0, 232, 122, 0.015) 41px
    );
}

.hardware-overline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-amber);
  margin-bottom: 32px;
  padding: 6px 18px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 100px;
}

.hw-overline-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-amber);
  animation: pulse-amber 2s ease-in-out infinite;
}

@keyframes pulse-amber {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(245, 158, 11, 0); }
}

.hardware-device {
  position: relative;
  width: 100%;
  max-width: 680px;
  height: auto;
  margin: 48px auto;
}

.device-body {
  position: absolute;
  inset: 20px;
  background: linear-gradient(145deg, #1a1f2e 0%, #0d1117 50%, #151b27 100%);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.08);
  filter: blur(0px);
  box-shadow:
    0 0 80px rgba(0, 232, 122, 0.08),
    0 40px 80px rgba(0,0,0,0.8),
    inset 0 1px 0 rgba(255,255,255,0.05);
  overflow: hidden;
}

.device-body::before { /* brushed metal texture */
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 2px,
    rgba(255,255,255,0.008) 2px,
    rgba(255,255,255,0.008) 4px
  );
}

.device-glow {
  position: absolute;
  inset: -30px;
  border-radius: 40px;
  background: radial-gradient(ellipse at 50% 55%, rgba(0, 232, 122, 0.12) 0%, transparent 70%);
  filter: blur(20px);
  animation: glow-breathe 4s ease-in-out infinite;
}

@keyframes glow-breathe {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

.device-led {
  position: absolute;
  top: calc(50% - 4px);
  right: 30px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 12px var(--accent-green);
  animation: glow-breathe 4s ease-in-out infinite;
}

.device-logo {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 3px;
  color: rgba(255,255,255,0.15);
  text-transform: uppercase;
}

.device-blur-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, transparent 30%, rgba(7, 9, 14, 0.7) 100%);
  border-radius: 16px;
}

.hw-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 40px 0 48px;
}

.hw-badge {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-cn);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--bg-card);
  letter-spacing: 0.3px;
  transition: all 0.3s;
}

.hw-badge:hover {
  color: var(--text-primary);
  border-color: var(--border-green);
}

.hw-badge.badge-amber {
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.06);
}

.hw-badge.badge-cyan {
  color: var(--accent-cyan);
  border-color: rgba(34, 211, 238, 0.3);
  background: rgba(34, 211, 238, 0.06);
}

/* ============================================================
   S6 — UNIVERSAL AI
   ============================================================ */
#universe {
  background: var(--bg-secondary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.orbit-system {
  position: relative;
  width: 420px;
  height: 420px;
  margin: 64px auto;
}

.orbit-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-green), #00a855);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #07090e;
  box-shadow: 0 0 60px rgba(0, 232, 122, 0.5);
  z-index: 5;
  font-family: var(--font-main);
}

.orbit-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.06);
  transform: translate(-50%, -50%);
}

.orbit-ring-1 { width: 180px; height: 180px; animation: spin-cw 12s linear infinite; }
.orbit-ring-2 { width: 280px; height: 280px; border-color: rgba(0, 232, 122, 0.08); animation: spin-ccw 18s linear infinite; }
.orbit-ring-3 { width: 390px; height: 390px; animation: spin-cw 28s linear infinite; }

@keyframes spin-cw { from { transform: translate(-50%, -50%) rotate(0deg); } to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes spin-ccw { from { transform: translate(-50%, -50%) rotate(0deg); } to { transform: translate(-50%, -50%) rotate(-360deg); } }

.orbit-node {
  position: absolute;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  font-family: var(--font-main);
  transition: all 0.3s;
}

.orbit-node:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-green);
  color: var(--text-primary);
  transform: scale(1.15);
}

/* Orbit-1 (r=90) */
.n1-a { top: calc(50% - 90px - 22px); left: calc(50% - 22px); }
.n1-b { top: calc(50% - 22px); left: calc(50% + 90px - 22px); }

/* Orbit-2 (r=140) */
.n2-a { top: calc(50% - 140px - 22px); left: calc(50% - 22px); }
.n2-b { top: calc(50% - 22px); left: calc(50% + 140px - 22px); }
.n2-c { top: calc(50% + 140px - 22px); left: calc(50% - 22px); }

/* Orbit-3 (r=195) */
.n3-a { top: calc(50% - 195px - 22px); left: calc(50% - 22px); }
.n3-b { top: calc(50% - 22px); left: calc(50% + 195px - 22px); }
.n3-c { top: calc(50% + 195px - 22px); left: calc(50% - 22px); }
.n3-d { top: calc(50% - 22px); left: calc(50% - 195px - 22px); }

.universe-tagline {
  font-family: var(--font-cn);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.universe-body {
  font-family: var(--font-cn);
  max-width: 540px;
  margin: 0 auto 40px;
}

/* ============================================================
   FOOTER / SOCIAL
   ============================================================ */
#footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: start;
  margin-bottom: 60px;
}

.footer-brand .nav-logo {
  margin-bottom: 20px;
}

.footer-desc {
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--text-muted);
  max-width: 300px;
  line-height: 1.8;
  margin-bottom: 28px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-cn);
  transition: color 0.2s;
}

.footer-nav a:hover { color: var(--text-primary); }

/* WeChat QR */
.wechat-widget {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

/* QR Code Frame */
.qr-frame {
  width: 200px;
  height: 200px;
  background: white;
  border-radius: 12px;
  padding: 16px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.qr-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.wechat-label {
  font-family: var(--font-cn);
  font-size: 13px;
  color: var(--text-secondary);
}

.wechat-sub {
  font-family: var(--font-cn);
  font-size: 12px;
  color: var(--text-muted);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-cn);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .enterprise-grid { grid-template-columns: 1fr; gap: 48px; }
  .enterprise-visual { min-height: 300px; }
  .revolution-layout { grid-template-columns: 1fr; gap: 48px; }
  .highlights-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --section-padding: 80px 0; }
  .container { padding: 0 24px; }

  .nav-menu { display: none; }
  .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: flex; }

  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(7, 9, 14, 0.98);
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 800;
  }

  .nav-menu.open a { font-size: 22px; }

  .hero-h1 { font-size: clamp(40px, 10vw, 60px); letter-spacing: -1px; }
  .skills-grid { grid-template-columns: 1fr; }
  .geo-banner-inner { flex-direction: column; align-items: flex-start; }
  .orbit-system { width: 300px; height: 300px; transform: scale(0.75); }
  .footer-grid { gap: 40px; }
}

@media (max-width: 480px) {
  .hero-ctas { flex-direction: column; width: 100%; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  .hw-badges { gap: 8px; }
}

/* ============================================================
   UNIVERSE — Models image
   ============================================================ */
.models-img-wrap {
  display: flex;
  justify-content: center;
  margin: 56px auto 48px;
  max-width: 720px;
}

.models-img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow:
    0 0 0 1px rgba(0, 232, 122, 0.12),
    0 24px 80px rgba(0, 0, 0, 0.6),
    0 0 60px rgba(0, 232, 122, 0.08);
  transition: box-shadow 0.4s ease, transform 0.4s ease;
}

.models-img:hover {
  transform: scale(1.015);
  box-shadow:
    0 0 0 1px rgba(0, 232, 122, 0.2),
    0 32px 100px rgba(0, 0, 0, 0.7),
    0 0 80px rgba(0, 232, 122, 0.14);
}

/* ============================================================
   COMING SOON TOAST
   ============================================================ */
.coming-soon-toast {
  position: fixed;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  background: rgba(13, 17, 23, 0.92);
  border: 1px solid rgba(0, 232, 122, 0.35);
  border-radius: 100px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow:
    0 8px 40px rgba(0, 0, 0, 0.6),
    0 0 0 1px rgba(255,255,255,0.04),
    0 0 30px rgba(0, 232, 122, 0.12);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out);
  white-space: nowrap;
  font-family: var(--font-cn);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.coming-soon-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.coming-soon-toast-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-green-dim);
  border: 1px solid rgba(0, 232, 122, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 11px;
}