/* ========================================
   承越.Chase Landing Page Styles v5
   Warm paper texture + serif/sans/mono type system
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #3B82F6;
  --color-primary-light: #60A5FA;
  --color-primary-dark: #2563EB;
  --color-secondary: #6366F1;
  --color-secondary-dark: #4F46E5;
  --color-accent: #8B5CF6;

  --gradient-primary: linear-gradient(135deg, #3B82F6 0%, #6366F1 50%, #8B5CF6 100%);
  --gradient-vivid: linear-gradient(135deg, #2563EB 0%, #4F46E5 100%);
  --gradient-subtle: linear-gradient(135deg, #EFF6FF 0%, #EEF2FF 100%);
  --gradient-hero: linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 60%, #FFFFFF 100%);

  --color-bg: #F8FAFC;
  --color-bg-alt: #FFFFFF;
  --color-bg-card: #FFFFFF;
  --color-bg-glass: rgba(255, 255, 255, 0.7);
  --color-surface: #F1F5F9;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94A3B8;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.1);

  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
  --font-logo: 'Space Grotesk', 'Noto Sans SC', sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  --max-width: 1100px;
  --nav-height: 60px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

/* Accessibility: skip to main content */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 10000;
  padding: 0.6rem 1rem;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0.75rem;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

/* Colorful gradient orbs - blue */
body::before {
  content: '';
  position: fixed;
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  max-width: 800px;
  max-height: 800px;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, rgba(59, 130, 246, 0) 65%);
  filter: blur(40px);
  animation: orbFloat1 22s ease-in-out infinite alternate;
}

/* Colorful gradient orbs - purple/indigo */
body::after {
  content: '';
  position: fixed;
  bottom: -15%;
  right: -10%;
  width: 55vw;
  height: 55vw;
  max-width: 900px;
  max-height: 900px;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(99, 102, 241, 0.1) 40%, rgba(139, 92, 246, 0) 70%);
  filter: blur(50px);
  animation: orbFloat2 28s ease-in-out infinite alternate;
}

@keyframes orbFloat1 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(8vw, 6vh) scale(1.15); }
}

@keyframes orbFloat2 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-6vw, -4vh) scale(1.1); }
}

@media (prefers-reduced-motion: reduce) {
  body::before, body::after { animation: none; }
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-dark); }

ul { list-style: none; }

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* --- Utilities --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-accent {
  color: var(--color-primary);
  font-style: italic;
  font-family: var(--font-serif);
}

.text-accent-light {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-style: italic;
  font-family: var(--font-serif);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-slow);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-arrow {
  font-size: 1.1em;
  transition: transform var(--transition-base);
}

.btn:hover .btn-arrow { transform: translateX(3px); }

.btn-primary {
  background: var(--gradient-vivid);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3B82F6 0%, #6366F1 100%);
  border-color: transparent;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
}

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

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
}

/* CTA section buttons */
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.28);
  transition: all var(--transition-base);
}

.btn-cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(59, 130, 246, 0.38);
  color: #fff;
}

.btn-cta-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  background: transparent;
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-base);
}

.btn-cta-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ========================================
   SCROLL PROGRESS
   ======================================== */
.scroll-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--gradient-primary);
  transition: width 50ms linear;
  z-index: 10;
}

/* ========================================
   DOT PATTERN BACKGROUND
   ======================================== */
.section-alt {
  background-color: var(--color-bg);
  background-image: radial-gradient(circle, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  position: relative;
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(226, 232, 240, 0.6);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.nav-logo-avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 1px solid rgba(59, 130, 246, 0.25);
  transition: transform var(--transition-base);
}

.nav-logo:hover .nav-logo-avatar {
  transform: scale(1.1);
}

.nav-logo-text {
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
}

.nav-logo-dot {
  color: var(--color-text-primary);
  font-weight: 800;
}

.nav-tagline {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-left: 0.85rem;
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--color-text-primary);
  white-space: nowrap;
  margin-right: auto;
  letter-spacing: 0.03em;
}

.nav-tagline-ai {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav-tagline-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.8;
  box-shadow: 0 0 6px rgba(59, 130, 246, 0.5);
}

@media (max-width: 1100px) {
  .nav-tagline { display: none; }
}

.nav-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: 1.25rem;
  padding: 0.25rem 0.7rem 0.25rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55);
  animation: navStatusPulse 1.8s ease-out infinite;
}

@keyframes navStatusPulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55); }
  70% { box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.nav-status-text {
  color: #15803d;
}

.nav-status-meta {
  color: var(--color-text-tertiary);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-left: 1px solid rgba(148, 163, 184, 0.3);
  padding-left: 0.45rem;
}

@media (max-width: 900px) {
  .nav-status { display: none; }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active { color: var(--color-text-primary); }

.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

.nav-cta {
  background: var(--color-text-primary);
  color: #fff !important;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.8rem !important;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  color: #fff !important;
  background: var(--color-primary);
  transform: translateY(-1px);
}

/* Hamburger */
.nav-toggle {
  display: none;
  width: 32px; height: 32px;
  position: relative;
  z-index: 1001;
}

.hamburger, .hamburger::before, .hamburger::after {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  position: absolute;
  left: 6px;
}
.hamburger { top: 15px; }
.hamburger::before { content: ''; top: -6px; }
.hamburger::after { content: ''; top: 6px; }

.nav-toggle.open .hamburger { background: transparent; }
.nav-toggle.open .hamburger::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open .hamburger::after { top: 0; transform: rotate(-45deg); }

/* ========================================
   HERO
   ======================================== */
.hero {
  min-height: 100vh;
  background: var(--gradient-hero);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
  padding-bottom: 0;
}

.hero-bg-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
}

.blob-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.55) 0%, rgba(99, 102, 241, 0.3) 50%, transparent 80%);
  top: -10%; right: -8%;
  animation: blobDrift1 25s ease-in-out infinite;
}

.blob-2 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.45) 0%, rgba(168, 85, 247, 0.22) 55%, transparent 80%);
  bottom: 5%; left: -8%;
  animation: blobDrift2 30s ease-in-out infinite;
}

@keyframes blobDrift1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-40px, 30px); }
}

@keyframes blobDrift2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -25px); }
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 3rem 0;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Hero meta line */
.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  flex-wrap: wrap;
  padding: 0.5rem 1rem 0.5rem 0.85rem;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px) saturate(160%);
  -webkit-backdrop-filter: blur(10px) saturate(160%);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.08);
}

.hero-meta-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-vivid);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
  animation: heroMetaPulse 2.4s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes heroMetaPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.05); }
}

.hero-meta-name {
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 1.05rem;
  font-weight: 400;
  background: var(--gradient-vivid);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.02em;
}

.hero-meta-role {
  color: var(--color-text-secondary);
  padding-left: 0.5rem;
  border-left: 1px solid rgba(59, 130, 246, 0.2);
}

.hero-meta-sep {
  color: var(--color-primary);
  opacity: 0.55;
  font-weight: 500;
}

.hero-meta-tags {
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 520px;
}

.hero-desc strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* Avatar */
.hero-avatar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.avatar-frame {
  position: relative;
  width: 280px;
  height: 280px;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 3px solid var(--color-border-light);
  box-shadow: var(--shadow-lg);
  animation: float 6s ease-in-out infinite;
  background: var(--color-bg-alt);
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.avatar-label {
  display: flex;
  justify-content: center;
  margin-top: 0.75rem;
}

.avatar-label-text {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Hero entry animations */
.hero-anim {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEnter 0.7s ease forwards;
  animation-delay: var(--delay);
}

.hero-avatar.hero-anim {
  transform: scale(0.95) translateY(10px);
  animation-name: heroEnterScale;
}

@keyframes heroEnter {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes heroEnterScale {
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* Hero Mouse Glow */
.hero-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, rgba(139, 92, 246, 0.08) 40%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 0;
  will-change: left, top;
}

.hero:hover .hero-glow {
  opacity: 1;
}

/* Hero Title Accent Shimmer */
.hero-title-accent {
  color: var(--color-primary);
  font-style: italic;
  font-family: var(--font-serif);
  position: relative;
  display: inline-block;
  letter-spacing: 0;
  padding-right: 0.15em;
  padding-left: 0.02em;
  overflow: visible;
  background: linear-gradient(90deg, #3B82F6 0%, #6366F1 35%, #8B5CF6 65%, #3B82F6 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s ease-in-out infinite;
  cursor: default;
  transition: transform var(--transition-base), filter var(--transition-base);
}

.hero-title-accent:hover {
  transform: scale(1.03);
  filter: drop-shadow(0 0 16px rgba(59, 130, 246, 0.4));
}

@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Hero Stats Bar */
.hero-stats {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-border-light);
  padding: 2rem 0;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat-item {
  text-align: center;
  padding: 0.75rem;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.stat-item:hover {
  background: rgba(59, 130, 246, 0.06);
  transform: scale(1.05);
}

.stat-item:hover .stat-number {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-plus {
  color: var(--color-primary);
  font-weight: 600;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 0.35rem;
  line-height: 1.4;
}

.stat-label span {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.1rem;
}

/* Hero Info Pills */
.hero-info-pills {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-border-light);
  padding: 1.5rem 0 2rem;
}

.info-pills-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.info-pill {
  padding: 0;
}

.info-pill-label {
  font-size: 0.7rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.info-pill-value {
  font-size: 0.85rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

/* ========================================
   MARQUEE
   ======================================== */
.marquee-strip {
  overflow: hidden;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  padding: 0.85rem 0;
  background: var(--color-bg);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 0;
  white-space: nowrap;
  animation: marqueeScroll 30s linear infinite;
  width: max-content;
}

.marquee-item {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 0 1rem;
}

.marquee-dot {
  font-size: 0.4rem;
  color: var(--color-text-tertiary);
  padding: 0 0.25rem;
}

@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ========================================
   SECTIONS (shared)
   ======================================== */
.section {
  padding: 6rem 0;
}

.section-header {
  margin-bottom: 4rem;
  max-width: 640px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-vivid);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--color-text-primary);
}

.section-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-top: 1rem;
  line-height: 1.75;
  max-width: 540px;
}

.section-header-wide {
  max-width: none;
}

.section-desc-wide {
  max-width: none;
  white-space: nowrap;
  overflow: visible;
}

@media (max-width: 1100px) {
  .section-desc-wide {
    white-space: normal;
  }
}

.section-meta {
  font-size: 0.7rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 1.5rem;
  font-weight: 500;
}

/* ========================================
   ABOUT
   ======================================== */
.about-content {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.about-row {
  display: grid;
  align-items: stretch;
  gap: 1.75rem;
}

.about-row-top {
  grid-template-columns: 1fr 1fr;
}

.about-row-top > .bio-quote,
.about-row-top > .agent-terminal {
  height: 100%;
  margin: 0;
}

.about-row-bottom {
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
}

.bio-quote {
  position: relative;
  padding: 2.5rem;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-left: 3px solid var(--color-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.bio-quote::before {
  content: '\201C';
  position: absolute;
  top: 0.5rem;
  left: 1.5rem;
  font-size: 3.5rem;
  color: var(--color-primary-light);
  opacity: 0.2;
  font-family: Georgia, serif;
  line-height: 1;
}

.bio-quote p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text-secondary);
}

.bio-quote p + p {
  margin-top: 0.85rem;
}

.bio-quote strong {
  color: var(--color-text-primary);
  font-weight: 700;
}

.bio-quote em {
  font-style: normal;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
}

.bio-quote-bridge {
  font-size: 0.95rem;
}

.bio-quote-help {
  list-style: none;
  margin: 1.1rem 0 0.85rem;
  padding: 1rem 1.1rem;
  background: var(--gradient-subtle);
  border: 1px solid rgba(99, 102, 241, 0.12);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.bio-quote-help li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.bio-quote-help li strong {
  color: var(--color-text-primary);
  font-weight: 700;
  margin-right: 0.15rem;
}

.bio-help-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-vivid);
  color: #fff;
  margin-top: 1px;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.28);
}

.bio-quote-cta {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.005em;
}

.bio-quote-cta::before {
  content: '→ ';
  color: var(--color-primary);
  margin-right: 0.15rem;
  font-weight: 700;
}

/* Agent collaboration terminal */
.agent-terminal {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(59, 130, 246, 0.18);
  box-shadow: 0 16px 40px -12px rgba(59, 130, 246, 0.18), 0 0 0 1px rgba(59, 130, 246, 0.05);
  overflow: hidden;
  font-family: var(--font-mono);
  position: relative;
}

.agent-terminal::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top right, rgba(139, 92, 246, 0.08), transparent 60%),
              radial-gradient(ellipse at bottom left, rgba(59, 130, 246, 0.08), transparent 60%);
  pointer-events: none;
}

.agent-terminal::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--gradient-vivid);
  border-radius: 0 2px 0 0;
  pointer-events: none;
  z-index: 3;
}

.agent-terminal.is-cycling::after {
  animation: agentCycleProgress 14s linear infinite;
}

@keyframes agentCycleProgress {
  0% { width: 0; opacity: 1; }
  95% { width: 100%; opacity: 1; }
  100% { width: 100%; opacity: 0; }
}

.agent-terminal-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  background: rgba(248, 250, 252, 0.7);
  border-bottom: 1px solid rgba(59, 130, 246, 0.1);
  position: relative;
}

.agent-terminal-dots {
  display: flex;
  gap: 0.4rem;
}
.agent-terminal-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: block;
}
.agent-terminal-dots span:nth-child(1) { background: #FF5F57; }
.agent-terminal-dots span:nth-child(2) { background: #FEBC2E; }
.agent-terminal-dots span:nth-child(3) { background: #28C840; }

.agent-terminal-title {
  flex: 1;
  text-align: center;
  font-size: 0.72rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
}

.agent-terminal-status {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.68rem;
  color: #059669;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.agent-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
  animation: agentStatusPulse 1.6s ease-in-out infinite;
}

@keyframes agentStatusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.agent-terminal-tabs {
  display: flex;
  gap: 0.3rem;
  padding: 0.55rem 0.75rem 0;
  background: rgba(248, 250, 252, 0.5);
  border-bottom: 1px solid rgba(59, 130, 246, 0.1);
  overflow-x: auto;
  scrollbar-width: none;
  position: relative;
}
.agent-terminal-tabs::-webkit-scrollbar { display: none; }

.agent-tab {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  padding: 0.4rem 0.85rem;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-base);
  position: relative;
  top: 1px;
}

.agent-tab:hover {
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.06);
}

.agent-tab.is-active {
  color: var(--color-primary-dark);
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(59, 130, 246, 0.25);
  border-bottom-color: transparent;
  font-weight: 600;
}

.agent-tab.is-active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--gradient-vivid);
  border-radius: 2px;
}

.agent-terminal-body {
  position: relative;
  flex: 1;
  padding: 1.1rem 1.25rem 1.25rem;
  font-size: 0.78rem;
  line-height: 1.85;
  color: var(--color-text-primary);
  min-height: 280px;
}

.agent-line {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
}

.agent-fade-in {
  animation: agentFadeIn 0.5s ease both;
}

@keyframes agentFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.agent-prompt {
  flex-shrink: 0;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.agent-line-user .agent-prompt {
  color: var(--color-primary);
}

.agent-line-ai .agent-prompt {
  background: var(--gradient-vivid);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.agent-line-user .agent-text {
  color: var(--color-text-primary);
}
.agent-line-ai .agent-text {
  color: var(--color-text-secondary);
}

.agent-text {
  word-break: break-word;
}

.agent-caret {
  display: inline-block;
  width: 0.55em;
  margin-left: 2px;
  color: var(--color-primary);
  font-weight: 700;
  animation: agentCaretBlink 0.7s step-end infinite;
  user-select: none;
}

.agent-line-ai .agent-caret {
  color: var(--color-accent);
}

@keyframes agentCaretBlink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.agent-line-meta {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  padding: 0.4rem 0.7rem;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.06) 0%, rgba(139, 92, 246, 0.06) 100%);
  border-left: 2px solid var(--color-primary);
  border-radius: 4px;
  margin: 0.4rem 0;
  letter-spacing: 0.02em;
}

.agent-step {
  color: var(--color-primary);
  font-weight: 700;
  margin-right: 0.15rem;
}

.agent-line-result {
  margin-top: 0.6rem;
  padding-top: 0.7rem;
  border-top: 1px dashed rgba(59, 130, 246, 0.2);
  font-size: 0.74rem;
  color: var(--color-text-secondary);
}

.agent-result-tag {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
  flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
  .agent-line { animation: none; opacity: 1; transform: none; }
  .agent-typing, .agent-typing-2 { animation: none; width: 100%; border-right: none; }
  .agent-status-dot { animation: none; }
}

/* .about-cards removed — identity cards now live in .about-row-bottom grid */

.identity-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.5rem 1.5rem 1.35rem;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(226, 232, 240, 0.85);
  transition: all var(--transition-slow);
  width: 100%;
  flex: 1 1 0;
}

.identity-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  border-radius: 4px 0 0 4px;
}

.identity-chase::before {
  background: linear-gradient(180deg, #3B82F6 0%, #6366F1 100%);
}

.identity-chengyue::before {
  background: linear-gradient(180deg, #8B5CF6 0%, #6366F1 100%);
}

.identity-card:hover {
  box-shadow: 0 12px 30px rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-2px);
}

.identity-card-head {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.identity-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
  transition: all var(--transition-slow);
}

.identity-chengyue .identity-icon {
  background: linear-gradient(135deg, #F5F3FF 0%, #EEF2FF 100%);
  color: var(--color-accent);
}

.identity-card:hover .identity-icon {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.35);
}

.identity-chengyue:hover .identity-icon {
  background: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
  box-shadow: 0 6px 16px rgba(139, 92, 246, 0.35);
}

.identity-info h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.2rem;
}

.identity-role {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--gradient-subtle);
  padding: 0.12rem 0.55rem;
  border-radius: var(--radius-full);
}

.identity-chengyue .identity-role {
  color: var(--color-accent);
  background: linear-gradient(135deg, #F5F3FF 0%, #EEF2FF 100%);
}

.identity-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.identity-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
}

.identity-tags li {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 0.25rem 0.7rem;
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.12);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.identity-chengyue .identity-tags li {
  background: rgba(139, 92, 246, 0.06);
  border-color: rgba(139, 92, 246, 0.12);
}

.identity-card:hover .identity-tags li {
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.25);
}

.identity-chengyue:hover .identity-tags li {
  background: rgba(139, 92, 246, 0.12);
  border-color: rgba(139, 92, 246, 0.25);
}

.identity-contrib {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin: 0.1rem 0 0.2rem;
}

.identity-contrib li {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

.contrib-dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 0.5em;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.identity-chengyue .contrib-dot {
  background: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.identity-recent {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.75rem 0.85rem;
  margin-top: 0.1rem;
  background: rgba(248, 250, 252, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.7);
  border-radius: var(--radius-md);
}

.identity-chengyue .identity-recent {
  background: rgba(245, 243, 255, 0.55);
  border-color: rgba(196, 181, 253, 0.35);
}

.identity-recent-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed rgba(148, 163, 184, 0.25);
}

.recent-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.55);
  animation: recentPulse 1.8s ease-out infinite;
}

.identity-chengyue .recent-pulse {
  background: var(--color-accent);
  box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.55);
  animation-name: recentPulseAccent;
}

@keyframes recentPulse {
  0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.55); }
  70% { box-shadow: 0 0 0 6px rgba(59, 130, 246, 0); }
  100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

@keyframes recentPulseAccent {
  0% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.55); }
  70% { box-shadow: 0 0 0 6px rgba(139, 92, 246, 0); }
  100% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0); }
}

.recent-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.identity-chengyue .recent-label {
  color: var(--color-accent);
}

.recent-meta {
  font-size: 0.7rem;
  color: var(--color-text-tertiary);
  margin-left: auto;
}

.identity-recent-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.identity-recent-list li {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.4rem 0;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
  border-bottom: 1px solid rgba(226, 232, 240, 0.55);
}

.identity-chengyue .identity-recent-list li {
  border-bottom-color: rgba(196, 181, 253, 0.25);
}

.identity-recent-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.identity-recent-list li:first-child {
  padding-top: 0;
}

.recent-time {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-primary);
  opacity: 0.85;
  width: 2.8rem;
}

.identity-chengyue .recent-time {
  color: var(--color-accent);
}

.recent-text {
  color: var(--color-text-secondary);
}

.identity-focus {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px dashed rgba(59, 130, 246, 0.18);
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-size: 0.78rem;
  line-height: 1.55;
}

.identity-focus-label {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  padding: 0.18rem 0.45rem;
  background: rgba(59, 130, 246, 0.08);
  border-radius: var(--radius-sm);
}

.identity-chengyue .identity-focus {
  border-top-color: rgba(139, 92, 246, 0.18);
}

.identity-chengyue .identity-focus-label {
  color: var(--color-accent);
  background: rgba(139, 92, 246, 0.08);
}

.identity-focus-text {
  color: var(--color-text-secondary);
}

/* Partnership loop badge */
.identity-loop {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  padding: 0 0.25rem;
  position: relative;
  z-index: 2;
  pointer-events: none;
  align-self: center;
  overflow: visible;
  min-width: 140px;
}

/* Horizontal data-flow lanes pointing to each identity card */
.identity-loop-stream {
  position: absolute;
  top: 50%;
  width: 2.8rem;
  height: 2px;
  margin-top: -1px;
  border-radius: 2px;
  overflow: visible;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.35), transparent);
}

.identity-loop-stream-left  { right: calc(50% + 40px); }
.identity-loop-stream-right { left:  calc(50% + 40px); }

.identity-loop-stream::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.55), transparent);
  background-size: 60% 100%;
  background-repeat: no-repeat;
  animation: loopStreamFlow 2.4s ease-in-out infinite;
}

.identity-loop-stream-right::before { animation-direction: reverse; }

.loop-dot {
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 10px rgba(99, 102, 241, 1), 0 0 20px rgba(139, 92, 246, 0.7);
}

.identity-loop-stream-left .loop-dot {
  animation: loopDotLTR 2.6s linear infinite;
}
.identity-loop-stream-right .loop-dot {
  animation: loopDotRTL 2.6s linear infinite;
}
.loop-dot-b { animation-delay: 1.3s !important; }

.identity-loop-ring {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px) saturate(160%);
  -webkit-backdrop-filter: blur(10px) saturate(160%);
  box-shadow:
    0 8px 24px rgba(59, 130, 246, 0.18),
    0 0 0 1px rgba(59, 130, 246, 0.12);
  animation: loopSpin 8s linear infinite;
  overflow: visible;
}

.identity-loop-ring svg {
  position: absolute;
  inset: 0;
  margin: auto;
}

/* Sonar pulse rings emanating outward */
.identity-loop-pulse {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid rgba(99, 102, 241, 0.55);
  opacity: 0;
  animation: loopPulse 3s ease-out infinite;
  pointer-events: none;
}

.identity-loop-pulse-2 { animation-delay: 1.5s; }

.identity-loop-label {
  position: relative;
  z-index: 1;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.15;
  text-align: center;
  background: var(--gradient-vivid);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.05em;
  animation: loopSpinReverse 8s linear infinite;
}

/* Cycling vocabulary stack — 训练 → 学习 → 沉淀 → 进化 */
.identity-loop-cycle {
  position: relative;
  width: 4.2rem;
  height: 1rem;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-align: center;
}

.loop-cycle-word {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  opacity: 0;
  transform: translateY(100%);
  animation: loopCycleWord 8s ease-in-out infinite;
  animation-delay: calc(var(--i) * 2s);
}

@keyframes loopSpin {
  to { transform: rotate(360deg); }
}

@keyframes loopSpinReverse {
  to { transform: rotate(-360deg); }
}

@keyframes loopStreamFlow {
  0%, 100% { background-position: -100% 0; }
  50%      { background-position: 100% 0; }
}

@keyframes loopDotLTR {
  0%   { left: 0;   opacity: 0; transform: scale(0.6); }
  10%  { opacity: 1; transform: scale(1); }
  90%  { opacity: 1; }
  100% { left: 100%; opacity: 0; transform: scale(0.6); }
}

@keyframes loopDotRTL {
  0%   { left: 100%; opacity: 0; transform: scale(0.6); }
  10%  { opacity: 1; transform: scale(1); }
  90%  { opacity: 1; }
  100% { left: 0; opacity: 0; transform: scale(0.6); }
}

@keyframes loopPulse {
  0%   { transform: scale(0.9); opacity: 0.85; border-color: rgba(99, 102, 241, 0.7); }
  60%  { opacity: 0.25; }
  100% { transform: scale(2.2); opacity: 0; border-color: rgba(139, 92, 246, 0.05); }
}

@keyframes loopCycleWord {
  0%, 22% { opacity: 1; transform: translateY(0); }
  25%, 100% { opacity: 0; transform: translateY(-100%); }
}

@media (prefers-reduced-motion: reduce) {
  .identity-loop-ring,
  .identity-loop-label,
  .identity-loop-stream::before,
  .loop-dot,
  .identity-loop-pulse,
  .loop-cycle-word { animation: none; }
  .loop-cycle-word { opacity: 0; }
}

/* ========================================
   CONTENT PILLARS
   ======================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.pillar-card {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0; left: -75%;
  width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.06), transparent);
  transform: skewX(-15deg);
  transition: left 0.6s ease;
  pointer-events: none;
}

.pillar-card:hover::before {
  left: 125%;
}

.pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.12);
  border-color: var(--color-primary-light);
}

.pillar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  line-height: 1;
}

.pillar-tag {
  font-size: 0.65rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-vivid);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
}

.pillar-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-lg);
  background: var(--gradient-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 1rem;
  transition: all var(--transition-slow);
}

.pillar-card:hover .pillar-icon {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
  transform: scale(1.05);
}

.pillar-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--color-text-primary);
}

.pillar-card > p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.pillar-topics {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.pillar-topics li {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.pillar-card:hover .pillar-topics li {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* ========================================
   WORKS SHOWCASE — cover-card layout
   ======================================== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.work-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.work-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  overflow: hidden;
  text-decoration: none;
}

.work-cover::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.15), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08), transparent 50%);
  pointer-events: none;
}

.work-cover-text {
  position: relative;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
  text-align: center;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Cover style variants — different gradients per category */
.work-card[data-cat="opb"] .work-cover { background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%); }
.work-card[data-cat="sop"] .work-cover { background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%); }
.work-card[data-cat="agent"] .work-cover { background: linear-gradient(135deg, #5B21B6 0%, #6366F1 100%); }
.work-card[data-cat="growth"] .work-cover { background: linear-gradient(135deg, #4338CA 0%, #9333EA 100%); }

.work-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.work-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-bottom: 0.75rem;
}

.work-meta-cat {
  font-weight: 600;
  color: var(--color-primary);
  padding: 0.15rem 0.55rem;
  background: var(--gradient-subtle);
  border-radius: var(--radius-full);
}

.work-card h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.work-card p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  flex-grow: 1;
}

.work-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.work-link svg {
  transition: transform var(--transition-fast);
}

.work-link:hover {
  gap: 0.6rem;
  color: var(--color-primary-dark);
}

.work-link:hover svg {
  transform: translateX(2px);
}

/* ========================================
   SERVICES
   ======================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.service-card {
  padding: 2.5rem 2rem;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  text-align: center;
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: -75%;
  width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.06), transparent);
  transform: skewX(-15deg);
  transition: left 0.6s ease;
  pointer-events: none;
}

.service-card:hover::before {
  left: 125%;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.12);
  border-color: var(--color-primary-light);
}

.service-featured {
  border-color: var(--color-primary-light);
  background: linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 100%);
}

.service-badge {
  position: absolute;
  top: 0.75rem; right: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

.services-grid-6 {
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.services-grid-6 .service-hot:nth-child(1),
.services-grid-6 .service-hot:nth-child(2) {
  grid-column: span 1;
}

.services-grid-6 .service-card:not(.service-hot) {
  /* handled by default grid flow */
}

@media (min-width: 768px) {
  .services-grid-6 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .services-grid-6 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card.service-hot {
  border-color: var(--color-primary-light);
  background: linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 100%);
}

.service-card.service-hot:hover {
  border-color: var(--color-primary);
}

.service-card.service-hot .service-icon {
  background: var(--gradient-subtle);
  color: var(--color-primary);
}

.service-badge-hot {
  position: absolute;
  top: 0.75rem; right: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

.service-icon {
  width: 56px; height: 56px;
  margin: 0 auto 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--gradient-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: all var(--transition-slow);
}

.service-card:hover .service-icon {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
  transform: scale(1.05);
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--color-text-primary);
}

.service-card > p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex: 1;
}

/* ========================================
   SOCIAL PLATFORMS
   ======================================== */
.platforms-row {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  transition: all var(--transition-slow);
  min-width: 150px;
  justify-content: center;
}

.platform-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

.platform-wechat:hover { background: #07C160; border-color: #07C160; }
.platform-weibo:hover { background: #FF8200; border-color: #FF8200; }
.platform-x:hover { background: #111827; border-color: #111827; }

/* legacy .platform-btn-featured / .platform-badge removed — replaced by .contact-* in CONTACT section */

/* ========================================
   CONTACT (WeChat CTA) — redesigned
   ======================================== */
.section-cta {
  background:
    radial-gradient(ellipse at top left, rgba(59, 130, 246, 0.08), transparent 55%),
    radial-gradient(ellipse at bottom right, rgba(139, 92, 246, 0.08), transparent 55%),
    var(--color-bg-alt);
  color: var(--color-text-primary);
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
}

.section-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(59, 130, 246, 0.05) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
}

/* ---------- New Contact Cards ---------- */
.contact-cards {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  align-items: start;
  max-width: 640px;
  margin-inline: auto;
}

.contact-card-new {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-slow);
  position: relative;
}

.contact-card-new:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.contact-card-primary {
  border-color: var(--color-primary-light);
  background: linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 100%);
}

.contact-card-new-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
}

.contact-card-new h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.4rem;
}

.contact-card-new > p {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.contact-card-new-qr {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  margin-bottom: 0.75rem;
}

.contact-card-new-qr img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact-card-new-hint {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

.contact-x {
  display: flex;
  justify-content: center;
  margin-top: 1.25rem;
}

.contact-x-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-primary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.contact-x-link:hover {
  border-color: var(--color-text-primary);
  background: var(--color-text-primary);
  color: #fff;
}

.contact-x-arrow {
  transition: transform var(--transition-fast);
}

.contact-x-link:hover .contact-x-arrow {
  transform: translateX(3px);
}

@media (max-width: 767px) {
  .contact-cards {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .contact-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Foot ---------- */
.contact-foot {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  margin-top: 2.5rem;
}



/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--color-bg);
  color: var(--color-text-tertiary);
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border-light);
}

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

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.footer-brand {
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: 0.03em;
}

.footer-brand-dot {
  font-weight: 800;
}

.footer-slogan {
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 0.9rem;
  line-height: 1.6;
  font-weight: 400;
  background: var(--gradient-vivid);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.03em;
}

.footer-slogan-ai {
  font-family: 'Noto Sans SC', sans-serif;
  font-weight: 600;
}

.footer-copy {
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-primary);
  letter-spacing: 0.03em;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  transition: background 0.2s ease, opacity 0.2s ease;
}

.footer-social-link:hover {
  background: rgba(59, 130, 246, 0.06);
  opacity: 0.8;
}

.footer-social-link:nth-child(1) {
  color: #07C160;
}

.footer-social-link:nth-child(2) {
  color: #000;
}

@media (max-width: 600px) {
  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
  }
  .footer-right {
    align-items: center;
  }
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-text-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1; visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  background: var(--color-primary);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */
[data-animate] {
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-animate="fade-up"] { transform: translateY(30px); }
[data-animate="fade-in"] { transform: none; }
[data-animate="fade-left"] { transform: translateX(-30px); }
[data-animate="fade-right"] { transform: translateX(30px); }
[data-animate="scale-in"] { transform: scale(0.95); }

[data-animate].animated {
  opacity: 1;
  transform: none;
}

[data-animate="stagger"] { opacity: 1; transform: none; }

[data-animate="stagger"] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-animate="stagger"].animated > * {
  opacity: 1; transform: none;
}

[data-animate="stagger"].animated > *:nth-child(1) { transition-delay: 0ms; }
[data-animate="stagger"].animated > *:nth-child(2) { transition-delay: 100ms; }
[data-animate="stagger"].animated > *:nth-child(3) { transition-delay: 200ms; }
[data-animate="stagger"].animated > *:nth-child(4) { transition-delay: 300ms; }
[data-animate="stagger"].animated > *:nth-child(5) { transition-delay: 400ms; }
[data-animate="stagger"].animated > *:nth-child(6) { transition-delay: 500ms; }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1023px) {
  .hero-title { font-size: 2.5rem; }
  .hero-inner { gap: 2.5rem; }
  .avatar-frame { width: 240px; height: 240px; }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .section-title { font-size: 2rem; }
  .stats-row, .info-pills-row { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
}

@media (max-width: 767px) {
  .container { padding: 0 1.25rem; }

  .nav-toggle { display: block; }

  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: 280px; height: 100vh;
    background: rgba(248, 250, 252, 0.96);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 0;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    box-shadow: -5px 0 30px rgba(59, 130, 246, 0.08);
    z-index: 1000;
  }

  .nav-links.open { transform: translateX(0); }
  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    padding: 0.85rem 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-links a::after { display: none; }

  .nav-cta {
    margin-top: 1rem;
    text-align: center;
    display: block;
    padding: 0.6rem 1rem;
  }

  .hero {
    min-height: auto;
    padding: 5.5rem 0 0;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
    padding: 2rem 0;
  }

  .hero-text { order: 2; align-items: center; }
  .hero-meta { justify-content: center; }
  .hero-avatar { order: 1; }
  .avatar-frame { width: 200px; height: 200px; }
  .hero-title { font-size: 2rem; }
  .hero-desc { font-size: 0.9rem; text-align: center; }
  .hero-actions { justify-content: center; flex-wrap: wrap; }

  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
  .stat-number { font-size: 1.5rem; }
  .info-pills-row { grid-template-columns: repeat(2, 1fr); gap: 1rem; }

  .section { padding: 4rem 0; }
  .section-header { margin-bottom: 2.5rem; }
  .section-title { font-size: 1.75rem; }

  .about-content { gap: 1.5rem; }
  .about-row-top { grid-template-columns: 1fr; gap: 1.5rem; }
  .about-row-bottom { grid-template-columns: 1fr; gap: 0.75rem; }
  .about-row-bottom .identity-loop { margin: -0.4rem 0; }
  .about-row-bottom .identity-loop-stream { display: none; }
  .pillars-grid { grid-template-columns: 1fr; gap: 1rem; }
  .works-grid { grid-template-columns: 1fr; gap: 1rem; }
  .services-grid { grid-template-columns: 1fr; gap: 1rem; }
  .services-grid-6 { grid-template-columns: 1fr; gap: 1rem; }
  .services-grid-6 .service-hot { grid-column: span 1; }

  /* Identity cards on mobile */
  .identity-card { padding: 1.25rem 1.25rem 1.15rem; }
  .identity-card-head { gap: 0.75rem; }
  .identity-recent-list li { font-size: 0.78rem; }
  .agent-terminal-body { font-size: 0.78rem; padding: 1rem; }
  .agent-terminal-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .agent-tab { white-space: nowrap; flex-shrink: 0; }

  /* Bio quote mobile */
  .bio-quote { padding: 1.5rem 1.5rem 1.5rem 1.65rem; }
  .bio-quote p { font-size: 0.95rem; line-height: 1.75; }

  /* Contact section mobile */
  .section-cta { padding: 4rem 0; }
  .contact-foot { margin-top: 1.75rem; }
  .contact-foot .btn { width: 100%; max-width: 320px; justify-content: center; }

  .back-to-top {
    bottom: 1.25rem; right: 1.25rem;
    width: 44px; height: 44px;
  }
}

@media (max-width: 374px) {
  .hero-title { font-size: 1.65rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .btn { width: 100%; justify-content: center; }
  .stats-row { grid-template-columns: 1fr 1fr; }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-animate], [data-animate="stagger"] > * {
    opacity: 1; transform: none;
  }

  .hero-anim { opacity: 1; transform: none; animation: none; }
  .marquee-track { animation: none; }
  html { scroll-behavior: auto; }
}

/* ========================================
   WECHAT TOAST
   ======================================== */
.wechat-toast {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #10B981;
  color: #fff;
  padding: 1rem 2rem;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 9999;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
}

.wechat-toast.active {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}