/* ====== 忆桥 - 全局样式 ====== */
:root {
  --bg: #faf8f5;
  --bg-deep: #f0ece6;
  --bg-card: #ffffff;
  --border: #e8e2d8;
  --border-light: #f0ece6;
  --text-primary: #1a1714;
  --text-secondary: #6b6560;
  --text-muted: #a09a92;
  --accent: #c47d3e;
  --accent-light: #daa06d;
  --accent-dark: #a0622e;
  --accent-glow: rgba(196, 125, 62, 0.12);
  --warm-1: #f5e6d3;
  --warm-2: #e8d5bc;
  --warm-3: #d4c0a4;
  --ink: #2c2520;
  --ink-light: #5c534b;
  --bridge-start: #c47d3e;
  --bridge-end: #8b6f4e;
  --shadow-sm: 0 1px 3px rgba(26, 23, 20, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 23, 20, 0.06);
  --shadow-lg: 0 12px 40px rgba(26, 23, 20, 0.08);
  --shadow-xl: 0 24px 60px rgba(26, 23, 20, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Subtle paper texture */
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='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.018;
  pointer-events: none;
  z-index: 9999;
}

::selection { background: var(--accent-glow); color: var(--accent-dark); }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--warm-3); border-radius: 3px; }

/* ====== ANIMATIONS ====== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes pulse-soft {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
@keyframes bridge-flow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes node-pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 0 12px transparent; }
}
@keyframes memory-fade {
  0% { opacity: 0; transform: scale(0.95) translateY(10px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

.reveal { opacity: 0; transform: translateY(30px); transition: all 0.9s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }
.reveal-delay-7 { transition-delay: 0.7s; }
.reveal-delay-8 { transition-delay: 0.8s; }

/* ====== NAVIGATION ====== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.85);
  backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--border-light);
  padding: 0 40px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.3s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}
.nav-brand-icon { width: 36px; height: 36px; position: relative; }
.nav-brand-icon svg { width: 100%; height: 100%; }
.nav-brand-text {
  font-family: 'Noto Serif SC', serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
}
.nav-links { display: flex; gap: 36px; list-style: none; }
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  transition: width 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: var(--text-primary);
  color: var(--bg);
  border: none;
  padding: 9px 24px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.nav-cta:hover {
  background: var(--ink);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ====== HERO ====== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 40px 80px;
  position: relative;
  overflow: hidden;
}
.hero-bg-decoration { position: absolute; inset: 0; pointer-events: none; }
.hero-bg-circle {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
}
.hero-bg-circle:nth-child(1) { width: 600px; height: 600px; top: -200px; right: -100px; opacity: 0.4; }
.hero-bg-circle:nth-child(2) { width: 400px; height: 400px; bottom: -100px; left: -50px; opacity: 0.3; }
.hero-bg-circle:nth-child(3) { width: 200px; height: 200px; top: 40%; left: 60%; opacity: 0.2; animation: float 8s ease-in-out infinite; }
.hero-bg-line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.hero-bg-line:nth-child(4) { width: 300px; top: 30%; left: 10%; }
.hero-bg-line:nth-child(5) { width: 200px; top: 60%; right: 15%; }

.hero-content {
  max-width: 1100px;
  width: 100%;
  text-align: center;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 32px;
  font-weight: 500;
}
.hero-eyebrow-line { width: 32px; height: 1px; background: var(--accent); }
.hero h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 56px;
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: 1px;
  margin-bottom: 12px;
  color: var(--ink);
}
.hero h1 em {
  font-style: italic;
  font-family: 'Playfair Display', 'Noto Serif SC', serif;
  color: var(--accent);
  position: relative;
}
.hero h1 em::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0.3;
  border-radius: 2px;
}
.hero-subtitle {
  font-family: 'Noto Serif SC', serif;
  font-size: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 48px;
  font-weight: 400;
}
.hero-tagline {
  font-size: 15px;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 48px;
  letter-spacing: 0.5px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px;
}
.btn-primary {
  background: var(--text-primary);
  color: var(--bg);
  border: none;
  padding: 14px 36px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.btn-primary:hover {
  background: var(--ink);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
  padding: 14px 36px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* Bridge visualization in hero */
.hero-bridge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 20px;
  position: relative;
}
.bridge-node {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 2;
  transition: all 0.4s;
}
.bridge-node:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.bridge-node.center {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--bridge-start), var(--bridge-end));
  border: none;
  box-shadow: 0 4px 20px var(--accent-glow);
  animation: node-pulse 3s infinite;
}
.bridge-connector {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--warm-3), var(--accent), var(--warm-3));
  background-size: 200% 100%;
  animation: bridge-flow 3s ease infinite;
  position: relative;
}
.bridge-connector::before {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  top: -2px;
}

/* ====== SECTION COMMON ====== */
.section { padding: 100px 40px; position: relative; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 20px;
}
.section-label-line { width: 24px; height: 1px; background: var(--accent); }
.section h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 36px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  color: var(--ink);
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ====== PAIN POINTS ====== */
.pain-section {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.4s;
}
.pain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--warm-2), var(--accent), var(--warm-2));
  opacity: 0;
  transition: opacity 0.4s;
}
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pain-card:hover::before { opacity: 1; }
.pain-icon {
  width: 48px;
  height: 48px;
  background: var(--warm-1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 20px;
}
.pain-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--ink); }
.pain-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ====== BRIDGE CONCEPT ====== */
.bridge-section { overflow: hidden; }
.bridge-visual { position: relative; max-width: 900px; margin: 0 auto; padding: 40px 0; }
.bridge-diagram { display: flex; flex-direction: column; align-items: center; gap: 0; }
.bridge-platforms {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}
.platform-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 0.4s;
  min-width: 100px;
}
.platform-node:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.platform-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: var(--warm-1);
}
.platform-name { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.bridge-connector-vertical {
  width: 2px;
  height: 50px;
  background: linear-gradient(to bottom, var(--warm-3), var(--accent));
  position: relative;
}
.bridge-connector-vertical::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  left: -3px;
  animation: pulse-soft 2s infinite;
}
.bridge-core {
  background: linear-gradient(135deg, var(--bridge-start), var(--bridge-end));
  border-radius: 20px;
  padding: 32px 48px;
  text-align: center;
  color: white;
  box-shadow: 0 8px 40px var(--accent-glow);
  position: relative;
}
.bridge-core h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.bridge-core p { font-size: 14px; opacity: 0.85; }
.bridge-connector-vertical-down {
  width: 2px;
  height: 50px;
  background: linear-gradient(to bottom, var(--accent), var(--warm-3));
}
.user-representation {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 32px;
  background: var(--bg-card);
  border: 2px solid var(--accent);
  border-radius: 16px;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.user-avatar {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--bridge-start), var(--bridge-end));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}
.user-info h4 { font-size: 16px; font-weight: 700; }
.user-info p { font-size: 13px; color: var(--text-muted); }

/* ====== VALUE PROPOSITION ====== */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  text-align: center;
  transition: all 0.4s;
  position: relative;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--warm-3); }
.value-number {
  font-family: 'Playfair Display', serif;
  font-size: 48px;
  font-weight: 900;
  color: var(--warm-2);
  line-height: 1;
  margin-bottom: 20px;
}
.value-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: var(--ink); }
.value-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ====== FEATURES ====== */
.features-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.features-visual { position: relative; }
.memory-stream { display: flex; flex-direction: column; gap: 16px; }
.memory-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 0.4s;
  animation: memory-fade 0.6s ease both;
}
.memory-item:nth-child(1) { animation-delay: 0s; }
.memory-item:nth-child(2) { animation-delay: 0.15s; }
.memory-item:nth-child(3) { animation-delay: 0.3s; }
.memory-item:nth-child(4) { animation-delay: 0.45s; }
.memory-item:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateX(4px); }
.memory-dot { width: 10px; height: 10px; border-radius: 50%; margin-top: 6px; flex-shrink: 0; }
.memory-dot.user { background: var(--accent); }
.memory-dot.agent { background: var(--warm-3); }
.memory-dot.session { background: var(--warm-2); }
.memory-content h5 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.memory-content p { font-size: 13px; color: var(--text-secondary); }
.memory-tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--warm-1);
  color: var(--accent-dark);
  margin-top: 6px;
  font-weight: 500;
}

.features-text h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--ink);
  line-height: 1.4;
}
.feature-list { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
.feature-item { display: flex; gap: 16px; align-items: flex-start; }
.feature-check {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--warm-1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.feature-check svg { width: 12px; height: 12px; color: var(--accent); }
.feature-item h5 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.feature-item p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ====== TARGET USERS ====== */
.users-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.user-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 20px;
  text-align: center;
  transition: all 0.4s;
}
.user-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--warm-3); }
.user-card-icon {
  width: 52px;
  height: 52px;
  background: var(--warm-1);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin: 0 auto 16px;
}
.user-card h5 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.user-card p { font-size: 12px; color: var(--text-muted); line-height: 1.6; }

/* ====== HOW IT WORKS ====== */
.steps-flow {
  display: flex;
  gap: 0;
  align-items: flex-start;
  position: relative;
}
.steps-flow::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 80px;
  right: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--warm-2), var(--accent), var(--warm-2));
}
.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 24px;
  transition: all 0.4s;
}
.step:hover .step-circle { border-color: var(--accent); box-shadow: 0 4px 20px var(--accent-glow); transform: scale(1.05); }
.step h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; max-width: 180px; }

/* ====== QUOTE / MANIFESTO ====== */
.manifesto-section {
  background: var(--ink);
  color: white;
  padding: 120px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.manifesto-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(196, 125, 62, 0.08) 0%, transparent 70%);
}
.manifesto-content { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.manifesto-quote {
  font-family: 'Noto Serif SC', serif;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.manifesto-quote em { font-style: italic; color: var(--accent-light); }
.manifesto-author { font-size: 14px; color: rgba(255,255,255,0.4); letter-spacing: 2px; }
.manifesto-divider { width: 40px; height: 1px; background: var(--accent); margin: 32px auto; opacity: 0.5; }

/* ====== CTA ====== */
.cta-section { padding: 100px 40px; text-align: center; position: relative; }
.cta-content { max-width: 600px; margin: 0 auto; }
.cta-section h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
}
.cta-section p { font-size: 16px; color: var(--text-secondary); margin-bottom: 40px; line-height: 1.8; }

/* ====== FOOTER ====== */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 40px 32px;
  background: var(--bg-deep);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.footer-brand-icon svg { width: 28px; height: 28px; }
.footer-desc { font-size: 13px; color: var(--text-muted); line-height: 1.7; }
.footer-col h5 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--text-secondary); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1100px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ====== JOIN PAGE ====== */
.join-hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 40px 60px;
  text-align: center;
}
.join-hero h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
}
.join-hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

.join-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding: 0 40px 100px;
}
.join-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  transition: all 0.4s;
}
.join-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--warm-3);
}
.join-card h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--ink);
}
.join-card > p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}
.join-form-group { margin-bottom: 20px; }
.join-form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.join-form-group input,
.join-form-group textarea,
.join-form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg);
  transition: border-color 0.3s;
}
.join-form-group input:focus,
.join-form-group textarea:focus,
.join-form-group select:focus {
  outline: none;
  border-color: var(--accent);
}
.join-form-group textarea { min-height: 100px; resize: vertical; }
.join-form-group input::placeholder,
.join-form-group textarea::placeholder { color: var(--text-muted); }
.join-submit {
  width: 100%;
  background: var(--text-primary);
  color: var(--bg);
  border: none;
  padding: 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
}
.join-submit:hover {
  background: var(--ink);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.join-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
}
.join-contact-item:last-child { border-bottom: none; }
.join-contact-icon {
  width: 40px;
  height: 40px;
  background: var(--warm-1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.join-contact-item h5 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.join-contact-item p { font-size: 13px; color: var(--text-secondary); }
.join-contact-item a { color: var(--accent); text-decoration: none; }
.join-contact-item a:hover { text-decoration: underline; }

/* ====== VISION PAGE ====== */
.vision-hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 40px 60px;
  text-align: center;
}
.vision-hero h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
}
.vision-hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.vision-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 40px 100px;
}
.vision-block {
  margin-bottom: 60px;
}
.vision-block h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--ink);
}
.vision-block p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}
.vision-block ul {
  list-style: none;
  padding-left: 0;
}
.vision-block ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.vision-block ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.6;
}
.vision-quote {
  background: var(--bg-deep);
  border-left: 3px solid var(--accent);
  padding: 24px 28px;
  border-radius: 0 12px 12px 0;
  margin: 32px 0;
}
.vision-quote p {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  font-style: italic;
  color: var(--ink-light);
  line-height: 1.8;
  margin: 0;
}

/* ====== ABOUT PAGE ====== */
.about-hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 40px 60px;
  text-align: center;
}
.about-hero h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
}
.about-hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 40px 100px;
}
.about-block {
  margin-bottom: 60px;
}
.about-block h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--ink);
}
.about-block p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}
.about-timeline {
  position: relative;
  padding-left: 32px;
}
.about-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--warm-3));
}
.timeline-item {
  position: relative;
  margin-bottom: 32px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--bg);
}
.timeline-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-dark);
  margin-bottom: 6px;
}
.timeline-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 40px; }
  .hero-subtitle { font-size: 17px; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .features-layout { grid-template-columns: 1fr; gap: 40px; }
  .users-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-flow { flex-direction: column; gap: 32px; }
  .steps-flow::before { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .join-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 100px 20px 60px; }
  .hero h1 { font-size: 30px; }
  .hero-subtitle { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-bridge { flex-wrap: wrap; gap: 12px; }
  .bridge-connector { width: 30px; }
  .section { padding: 60px 20px; }
  .section h2 { font-size: 26px; }
  .pain-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .users-grid { grid-template-columns: repeat(2, 1fr); }
  .manifesto-quote { font-size: 22px; }
  .cta-section h2 { font-size: 26px; }
  .footer-inner { grid-template-columns: 1fr; }
  .bridge-platforms { gap: 12px; }
  .platform-node { min-width: 80px; padding: 12px; }
  .join-hero h1, .vision-hero h1, .about-hero h1 { font-size: 28px; }
  .join-grid { padding: 0 20px 60px; }
  .vision-content, .about-content { padding: 0 20px 60px; }
}