/* ===== 东升国际28 · 南宫大舞台设计系统 ===== */
/* 视觉风格：野兽派+赛博流体+超现实拼贴 */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;500;700;900&family=Noto+Serif+SC:wght@700;900&display=swap');

:root {
  --bg-primary: #0b0a0c;
  --bg-secondary: #161218;
  --bg-card: #1f1a21;
  --text-primary: #f0eae6;
  --text-secondary: #b8a9b3;
  --accent-neon: #f7c948;
  --accent-magenta: #d9468b;
  --accent-cyan: #4fd1c5;
  --accent-purple: #a78bfa;
  --glow-yellow: rgba(247, 201, 72, 0.4);
  --glow-magenta: rgba(217, 70, 139, 0.3);
  --border-glow: rgba(247, 201, 72, 0.2);
  --font-sans: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-serif: 'Noto Serif SC', Georgia, serif;
  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --shadow-card: 0 20px 40px -12px rgba(0,0,0,0.8), 0 0 0 1px rgba(247,201,72,0.08);
  --transition-smooth: cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== 容器 ===== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
}

/* ===== 头部 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 10, 12, 0.85);
  backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--border-glow);
  transition: background 0.4s var(--transition-smooth);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  padding: 0 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--accent-neon);
  text-shadow: 0 0 20px var(--glow-yellow), 0 0 60px var(--glow-yellow);
  position: relative;
  transition: transform 0.3s var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo::before {
  content: '◆';
  font-size: 1.6rem;
  color: var(--accent-magenta);
  text-shadow: 0 0 20px var(--glow-magenta);
  animation: pulseGlow 2s ease-in-out infinite alternate;
}

.logo:hover {
  transform: scale(1.02);
}

@keyframes pulseGlow {
  0% { text-shadow: 0 0 10px var(--glow-yellow); }
  100% { text-shadow: 0 0 30px var(--glow-yellow), 0 0 80px var(--glow-yellow); }
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s, transform 0.3s var(--transition-smooth);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-neon), var(--accent-magenta));
  transition: width 0.4s var(--transition-smooth);
}

.main-nav a:hover {
  color: var(--accent-neon);
  transform: translateY(-1px);
}

.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-magenta));
  color: var(--bg-primary) !important;
  padding: 10px 28px !important;
  border-radius: 40px;
  font-weight: 700 !important;
  letter-spacing: 0.04em;
  box-shadow: 0 0 30px var(--glow-yellow);
  transition: all 0.3s var(--transition-smooth) !important;
  border: none;
}

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

.nav-cta:hover {
  transform: scale(1.05) !important;
  box-shadow: 0 0 50px var(--glow-yellow), 0 0 80px var(--glow-magenta);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--accent-neon);
  font-size: 2rem;
  cursor: pointer;
  padding: 8px;
  transition: transform 0.3s;
}

.menu-toggle:hover { transform: rotate(90deg); }

/* ===== 英雄区 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
  background: radial-gradient(ellipse at 20% 40%, rgba(217,70,139,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 60%, rgba(79,209,197,0.06) 0%, transparent 50%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 70vmax;
  height: 70vmax;
  background: radial-gradient(circle, rgba(247,201,72,0.03) 0%, transparent 70%);
  pointer-events: none;
  animation: heroFloat 20s ease-in-out infinite alternate;
}

@keyframes heroFloat {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-40px, 40px) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent-magenta);
  padding: 6px 16px;
  border: 1px solid rgba(217,70,139,0.3);
  border-radius: 40px;
  background: rgba(217,70,139,0.06);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.hero-content h1 {
  font-family: var(--font-serif);
  font-size: clamp(3.2rem, 8vw, 6.4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 24px;
  text-shadow: 0 2px 40px rgba(0,0,0,0.6);
}

.hero-content h1 span {
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  height: 60%;
  background: radial-gradient(circle at 30% 50%, var(--accent-neon) 0%, transparent 60%),
              radial-gradient(circle at 70% 30%, var(--accent-magenta) 0%, transparent 50%);
  opacity: 0.15;
  border-radius: 50%;
  filter: blur(80px);
  animation: heroPulse 8s ease-in-out infinite alternate;
}

@keyframes heroPulse {
  0% { opacity: 0.1; transform: translateY(-50%) scale(1); }
  100% { opacity: 0.25; transform: translateY(-45%) scale(1.15); }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  border-radius: 60px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.4s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-magenta));
  color: var(--bg-primary);
  box-shadow: 0 4px 30px var(--glow-yellow);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 50px var(--glow-yellow), 0 0 80px var(--glow-magenta);
}

.btn-outline {
  background: transparent;
  color: var(--accent-neon);
  border: 1.5px solid var(--accent-neon);
  box-shadow: inset 0 0 0 0 var(--accent-neon);
}

.btn-outline:hover {
  background: var(--accent-neon);
  color: var(--bg-primary);
  box-shadow: 0 0 40px var(--glow-yellow);
  transform: translateY(-3px);
}

/* ===== 通用区块 ===== */
.section {
  padding: 120px 0;
  position: relative;
}

.section-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  padding: 4px 12px;
  border-left: 3px solid var(--accent-cyan);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.8;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-top: 60px;
}

.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid rgba(247,201,72,0.06);
  box-shadow: var(--shadow-card);
  transition: all 0.5s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-neon), var(--accent-magenta), var(--accent-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--transition-smooth);
}

.category-card:hover {
  transform: translateY(-8px);
  border-color: rgba(247,201,72,0.2);
  box-shadow: 0 30px 60px -15px rgba(0,0,0,0.9), 0 0 0 1px rgba(247,201,72,0.1);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  font-size: 2.8rem;
  margin-bottom: 20px;
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.category-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.category-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.card-link {
  color: var(--accent-neon);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s var(--transition-smooth);
}

.card-link:hover {
  gap: 12px;
  color: var(--accent-magenta);
}

/* ===== 特性区块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 60px 0;
}

.feature-image {
  position: relative;
  aspect-ratio: 4/3;
  background: radial-gradient(circle at 30% 40%, rgba(79,209,197,0.1) 0%, transparent 70%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(79,209,197,0.1);
  overflow: hidden;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(247,201,72,0.02) 20px, rgba(247,201,72,0.02) 21px);
}

.feature-text {
  padding: 20px 0;
}

.feature-text h3 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.2;
}

.feature-text p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.feature-list li::before {
  content: '▸';
  color: var(--accent-neon);
  font-weight: 700;
  font-size: 1.2rem;
}

/* ===== 统计栏 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 80px 0;
  border-top: 1px solid rgba(247,201,72,0.08);
  border-bottom: 1px solid rgba(247,201,72,0.08);
  margin: 40px 0;
}

.stat-item {
  text-align: center;
  padding: 24px;
  transition: transform 0.3s var(--transition-smooth);
}

.stat-item:hover {
  transform: scale(1.05);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 3.6rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 60px;
}

.content-wall-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid rgba(247,201,72,0.05);
  transition: all 0.4s var(--transition-smooth);
  position: relative;
}

.content-wall-item:hover {
  border-color: rgba(247,201,72,0.2);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0,0,0,0.6);
}

.content-wall-item h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--accent-neon);
}

.content-wall-body {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(247,201,72,0.05);
  overflow: hidden;
  transition: all 0.3s var(--transition-smooth);
}

.faq-item summary {
  padding: 20px 28px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  transition: color 0.3s;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--accent-neon);
  transition: transform 0.4s var(--transition-smooth);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] {
  border-color: rgba(247,201,72,0.2);
}

.faq-answer {
  padding: 0 28px 24px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== CTA横幅 ===== */
.cta-banner {
  background: linear-gradient(135deg, rgba(247,201,72,0.06) 0%, rgba(217,70,139,0.06) 100%);
  border-radius: var(--radius-lg);
  padding: 80px 60px;
  text-align: center;
  border: 1px solid rgba(247,201,72,0.1);
  position: relative;
  overflow: hidden;
  margin: 60px 0;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(247,201,72,0.04) 0%, transparent 60%);
  animation: ctaShift 12s ease-in-out infinite alternate;
}

@keyframes ctaShift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(20px, -20px); }
}

.cta-banner h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 32px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn {
  position: relative;
  z-index: 1;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(247,201,72,0.06);
  padding: 80px 0 0;
}

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

.footer-brand .logo {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-neon);
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 6px 0;
  transition: color 0.3s, padding-left 0.3s var(--transition-smooth);
}

.footer-col a:hover {
  color: var(--accent-neon);
  padding-left: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(247,201,72,0.06);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.footer-bottom a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

.footer-bottom a:hover {
  color: var(--accent-neon);
}

/* ===== 辅助类 ===== */
.text-accent {
  color: var(--accent-neon);
}

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

.seo-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 40px auto 0;
  line-height: 1.8;
  padding: 20px;
  border-left: 2px solid var(--accent-cyan);
  background: rgba(79,209,197,0.02);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container { padding: 0 28px; }
  .header-inner { padding: 0 28px; }
  .feature-block { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .header-inner { padding: 0 20px; }
  
  .main-nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: rgba(11, 10, 12, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 32px 24px;
    gap: 20px;
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.5s var(--transition-smooth);
    border-bottom: 1px solid var(--border-glow);
    pointer-events: none;
  }
  
  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .menu-toggle { display: block; }
  
  .hero { padding: 120px 0 60px; }
  .hero-image { display: none; }
  .hero-content { max-width: 100%; }
  
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .feature-image { aspect-ratio: 3/2; }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 40px 0;
  }
  
  .stat-number { font-size: 2.6rem; }
  
  .cta-banner { padding: 50px 28px; }
  
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .header-inner { padding: 0 16px; height: 64px; }
  .logo { font-size: 1.4rem; }
  
  .hero { padding: 100px 0 40px; }
  .hero-content h1 { font-size: 2.6rem; }
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  
  .section { padding: 60px 0; }
  .cards-grid { grid-template-columns: 1fr; gap: 20px; }
  
  .stats-bar { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-number { font-size: 2rem; }
  
  .content-wall { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-brand p { max-width: 100%; }
}