/* ========================================
   VABT 瓦比特 - 官方网站样式
   设计语言：赛博暗色 + 玻璃态 + 霓虹渐变
   ======================================== */

/* --- CSS 变量 --- */
:root {
  --bg-deep: #0a0a0f;
  --bg-surface: #111118;
  --bg-card: rgba(20, 20, 35, 0.6);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(100, 180, 255, 0.2);
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #606078;
  --accent-1: #5b9cf5;
  --accent-2: #7c5cf5;
  --accent-3: #f55b9c;
  --accent-glow: rgba(91, 156, 245, 0.35);
  --gradient-primary: linear-gradient(135deg, #5b9cf5, #7c5cf5);
  --gradient-accent: linear-gradient(135deg, #f55b9c, #f5a65b);
  --gradient-hero: linear-gradient(135deg, #5b9cf5, #7c5cf5, #f55b9c);
  --glass-bg: rgba(18, 18, 30, 0.65);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

ul { list-style: none; }

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
  position: relative;
}

/* --- 粒子背景画布 --- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* --- 玻璃卡片 --- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 20px var(--accent-glow);
}

/* --- 导航栏 --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 10px 0;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 2px;
  color: var(--text-primary);
}

.logo-img {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  object-fit: contain;
  filter: drop-shadow(0 0 12px rgba(91, 156, 245, 0.4));
  animation: logo-glow 3s ease-in-out infinite;
}

.footer-logo .logo-img {
  width: 36px;
  height: 36px;
}

@keyframes logo-glow {
  0%, 100% { filter: drop-shadow(0 0 10px rgba(91, 156, 245, 0.3)) drop-shadow(0 0 3px rgba(167, 139, 250, 0.15)); }
  50% { filter: drop-shadow(0 0 20px rgba(124, 92, 245, 0.55)) drop-shadow(0 0 8px rgba(244, 114, 182, 0.4)); }
}

.logo-text {
  background: linear-gradient(135deg, #c8d6ff, #e8e8f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: logo-text-shimmer 4s ease-in-out infinite;
}

@keyframes logo-text-shimmer {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.3); }
}

.logo-icon {
  display: none;
}

@keyframes logo-pulse {
  0%, 100% { opacity: 1; text-shadow: 0 0 10px var(--accent-glow); }
  50% { opacity: 0.6; text-shadow: 0 0 30px var(--accent-glow); }
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition);
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* --- Hero 主视觉 --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 160px 24px 120px;
}

.hero-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(91, 156, 245, 0.12) 0%, rgba(124, 92, 245, 0.06) 40%, transparent 70%);
  pointer-events: none;
  animation: glow-float 8s ease-in-out infinite;
}

@keyframes glow-float {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.15); }
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(91, 156, 245, 0.1);
  border: 1px solid rgba(91, 156, 245, 0.25);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-1);
  margin-bottom: 40px;
  animation: fade-in-up 0.8s ease-out;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-1);
  border-radius: 50%;
  animation: logo-pulse 2s ease-in-out infinite;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.2;
  margin-bottom: 32px;
  letter-spacing: -1px;
}

.title-line {
  display: block;
  background: linear-gradient(180deg, #fff 0%, #c0c0d0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-line.accent {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 48px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 40px;
  background: var(--gradient-primary);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 1px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #7c5cf5, #5b9cf5);
  opacity: 0;
  transition: opacity var(--transition);
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(91, 156, 245, 0.4);
}

.btn-primary span { position: relative; z-index: 1; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 1px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-outline:hover {
  border-color: var(--accent-1);
  background: rgba(91, 156, 245, 0.08);
  transform: translateY(-2px);
}

.btn-full { width: 100%; }

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-ornament {
  position: absolute;
  top: 50%;
  right: -200px;
  transform: translateY(-50%);
  width: 500px;
  height: 500px;
  pointer-events: none;
  opacity: 0.4;
}

.ornament-ring {
  position: absolute;
  border: 1px solid rgba(91, 156, 245, 0.15);
  border-radius: 50%;
  animation: ring-rotate 20s linear infinite;
}

.ornament-ring:nth-child(1) {
  width: 100%;
  height: 100%;
  animation-duration: 20s;
}

.ornament-ring:nth-child(2) {
  width: 70%;
  height: 70%;
  top: 15%;
  left: 15%;
  animation-duration: 15s;
  animation-direction: reverse;
}

.ornament-ring:nth-child(3) {
  width: 40%;
  height: 40%;
  top: 30%;
  left: 30%;
  animation-duration: 10s;
}

@keyframes ring-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Section 通用 --- */
.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 4px;
  color: var(--accent-1);
  text-transform: uppercase;
  margin-bottom: 16px;
  padding: 6px 16px;
  border: 1px solid rgba(91, 156, 245, 0.2);
  border-radius: 50px;
  background: rgba(91, 156, 245, 0.05);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

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

.section-sub {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- 关于我们 --- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.about-card {
  padding: 40px 32px;
  text-align: center;
}

.about-card .card-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(91, 156, 245, 0.1);
  border-radius: 20px;
  color: var(--accent-1);
}

.about-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.about-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* --- 社群架构金字塔 --- */
.ecosystem-pyramid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.pyramid-level {
  width: 100%;
}

.level-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  position: relative;
  transition: all var(--transition);
}

.level-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.level-top .level-card {
  border-color: rgba(245, 91, 156, 0.3);
  background: rgba(245, 91, 156, 0.05);
  max-width: 500px;
  margin: 0 auto;
}

.level-mid .level-card {
  border-color: rgba(124, 92, 245, 0.3);
  background: rgba(124, 92, 245, 0.05);
  max-width: 620px;
  margin: 0 auto;
}

.level-base .level-card {
  max-width: 740px;
  margin: 0 auto;
}

.level-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 3px;
  padding: 4px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.level-top .level-badge {
  background: rgba(245, 91, 156, 0.15);
  color: var(--accent-3);
  border: 1px solid rgba(245, 91, 156, 0.3);
}

.level-mid .level-badge {
  background: rgba(124, 92, 245, 0.15);
  color: var(--accent-2);
  border: 1px solid rgba(124, 92, 245, 0.3);
}

.level-base .level-badge {
  background: rgba(91, 156, 245, 0.15);
  color: var(--accent-1);
  border: 1px solid rgba(91, 156, 245, 0.3);
}

.level-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.level-card > p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.level-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.level-features span {
  padding: 4px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.level-arrow {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

/* --- 晋级路径时间轴 --- */
.path-timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: 60px;
}

.timeline-line {
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-1), var(--accent-2), var(--accent-3));
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -60px;
  top: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 2px solid var(--accent-1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-1);
  z-index: 2;
}

.timeline-content {
  padding: 28px 32px;
}

.timeline-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-tags span {
  padding: 4px 12px;
  background: rgba(91, 156, 245, 0.1);
  border: 1px solid rgba(91, 156, 245, 0.2);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--accent-1);
}

/* --- 项目孵化流程 --- */
.incubation-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
}

.flow-step {
  flex: 0 0 auto;
}

.step-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  text-align: center;
  margin-bottom: 12px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.4;
}

.flow-step.highlight .step-num {
  opacity: 1;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.step-card {
  padding: 20px 24px;
  width: 180px;
  text-align: center;
}

.step-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.flow-connector {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  padding: 0 8px;
}

.flow-step.highlight .step-card {
  border-color: rgba(245, 91, 156, 0.3);
  background: rgba(245, 91, 156, 0.06);
}

/* --- AI 培训 --- */
.training-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.training-card {
  padding: 40px 32px;
  text-align: center;
}

.training-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 20px var(--accent-glow);
}

.training-card.featured {
  border-color: rgba(124, 92, 245, 0.3);
}

.training-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(91, 156, 245, 0.1);
  border-radius: 20px;
  color: var(--accent-1);
}

.training-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.training-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* --- 价值生态 --- */
.subsection-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
}

.subsection-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto 40px;
}

.revenue-grid,
.resources,
.honors {
  margin-bottom: 80px;
}

.revenue-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.revenue-card {
  padding: 32px 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.revenue-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border-glow);
}

.revenue-icon {
  margin-bottom: 16px;
  color: var(--accent-1);
  display: flex;
  justify-content: center;
}

.revenue-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.revenue-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.resource-item {
  padding: 24px;
  text-align: center;
}

.resource-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(91, 156, 245, 0.1);
  border-radius: 14px;
  color: var(--accent-1);
}

.resource-item span {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
}

.resource-item small {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.honors-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.honor-card {
  padding: 28px 20px;
  text-align: center;
}

.honor-card.highlight {
  border-color: rgba(245, 165, 91, 0.3);
  background: rgba(245, 165, 91, 0.06);
}

.honor-badge {
  width: 52px;
  height: 52px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(91, 156, 245, 0.1);
  border-radius: 14px;
  color: var(--accent-1);
}

.honor-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.honor-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- 加入我们 --- */
.join-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.join-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  margin-top: 32px;
}

.join-info h3:first-child {
  margin-top: 0;
}

.join-requirements {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.join-requirements li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.check {
  color: var(--accent-1);
  font-weight: 700;
  flex-shrink: 0;
}

.join-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.join-tags span {
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.join-tags span:hover {
  border-color: var(--accent-1);
  color: var(--accent-1);
}

.join-form {
  padding: 40px;
}

.join-form h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-1);
  background: rgba(91, 156, 245, 0.06);
  box-shadow: 0 0 0 3px rgba(91, 156, 245, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

/* --- 页脚 --- */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-links h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links a,
.footer-links span {
  display: block;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 10px;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent-1);
}

.footer-bottom {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* --- 动画 --- */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --- 表单提交成功反馈 --- */
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.form-success.show {
  display: block;
}

.form-success .success-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  animation: logo-pulse 1.5s ease-in-out;
}

.form-success h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.form-success p {
  color: var(--text-secondary);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .training-grid { grid-template-columns: 1fr; }
  .revenue-cards { grid-template-columns: repeat(2, 1fr); }
  .resources-grid { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .join-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 32px; }

  .incubation-flow {
    flex-direction: column;
  }

  .flow-connector {
    transform: rotate(90deg);
    padding: 8px 0;
  }

  .step-card {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .section-header { margin-bottom: 48px; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-stats { gap: 24px; }
  .stat-item { flex: 0 0 calc(50% - 12px); }
  .stat-num { font-size: 2rem; }

  .ecosystem-pyramid {
    max-width: 100%;
  }

  .level-card { padding: 24px; }
  .path-timeline { padding-left: 48px; }
  .timeline-marker { left: -48px; width: 44px; height: 44px; font-size: 1rem; }

  .training-card { padding: 32px 24px; }
  .revenue-cards { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-ornament { display: none; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-desc { font-size: 0.95rem; }
  .btn-primary, .btn-outline { padding: 14px 28px; font-size: 0.85rem; }
  .resources-grid { grid-template-columns: 1fr; }
  .honors-grid { grid-template-columns: 1fr; }
  .join-form { padding: 24px; }
}