:root {
  --color-bg: #0a0a0f;
  --color-surface: #14141f;
  --color-primary: #ff3d7f;
  --color-secondary: #00f0ff;
  --color-accent: #ffe600;
  --color-text: #f0f0f5;
  --color-text-muted: #8888a0;
  --color-border: rgba(255, 61, 127, 0.2);
  --font-display: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius: 0;
  --transition: cubic-bezier(0.23, 1, 0.32, 1) 0.4s;
}

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

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

::selection {
  background: var(--color-primary);
  color: var(--color-bg);
}

/* CONTAINER */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
}

/* SITE HEADER */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo::before {
  content: '◆';
  color: var(--color-primary);
  font-size: 1.2rem;
  animation: pulse-glow 2s infinite alternate;
}

@keyframes pulse-glow {
  0% { text-shadow: 0 0 5px var(--color-primary); }
  100% { text-shadow: 0 0 25px var(--color-primary), 0 0 50px var(--color-primary); }
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 3rem;
  list-style: none;
}

.main-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  position: relative;
  transition: color var(--transition);
  padding: 0.3rem 0;
}

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

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

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

.nav-cta {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  padding: 0.6rem 1.8rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.nav-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--color-primary);
  transition: left var(--transition);
  z-index: -1;
}

.nav-cta:hover {
  color: var(--color-bg);
}

.nav-cta:hover::before {
  left: 0;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* HERO */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 8rem 0 4rem;
  position: relative;
  gap: 4rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle at 70% 50%, rgba(255, 61, 127, 0.08), transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 1.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-secondary);
  animation: fade-in-up 0.8s ease-out;
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  position: relative;
}

.hero-content h1 span {
  color: var(--color-primary);
  display: block;
  font-size: 1.2em;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 500px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image::after {
  content: '◆';
  font-size: 30vw;
  color: var(--color-primary);
  opacity: 0.15;
  position: absolute;
  animation: rotate-slow 20s linear infinite;
}

@keyframes rotate-slow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 2.5rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  position: relative;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
}

.btn-primary:hover {
  background: transparent;
  color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(255, 61, 127, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-text-muted);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-3px);
}

/* SECTION */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 1rem;
  padding: 0.3rem 0;
  border-bottom: 2px solid var(--color-secondary);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 3rem;
}

/* CARDS GRID */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.category-card {
  background: var(--color-surface);
  padding: 3rem 2rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.category-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-8px);
  background: rgba(255, 61, 127, 0.05);
}

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

.card-icon {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  display: block;
  transition: transform var(--transition);
}

.category-card:hover .card-icon {
  transform: scale(1.2);
}

.category-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.category-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
  margin-top: 1.5rem;
  transition: gap var(--transition);
}

.card-link:hover {
  gap: 1rem;
}

/* FEATURE BLOCK */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 4rem 0;
}

.feature-image {
  background: var(--color-surface);
  aspect-ratio: 4/3;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--color-primary);
  position: relative;
  overflow: hidden;
}

.feature-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 61, 127, 0.1), transparent);
}

.feature-text {
  position: relative;
}

.feature-text h3 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.feature-text p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--color-text);
  font-size: 0.95rem;
}

.feature-list li::before {
  content: '→';
  color: var(--color-secondary);
  font-weight: 700;
}

/* STATS BAR */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  padding: 4rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin: 4rem 0;
}

.stat-item {
  text-align: center;
  padding: 2rem;
  position: relative;
}

.stat-item::after {
  content: '';
  position: absolute;
  right: 0;
  top: 10%;
  height: 80%;
  width: 1px;
  background: var(--color-border);
}

.stat-item:last-child::after {
  display: none;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
  display: block;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

/* CONTENT WALL */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--color-border);
  margin: 3rem 0;
}

.content-wall-item {
  background: var(--color-surface);
  padding: 3rem 2rem;
  position: relative;
  transition: background var(--transition);
  cursor: pointer;
}

.content-wall-item:hover {
  background: rgba(255, 61, 127, 0.05);
}

.content-wall-item h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.content-wall-body {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 3rem auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
  cursor: pointer;
}

.faq-item summary {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: transform var(--transition);
}

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

.faq-answer {
  padding-top: 1rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* CTA BANNER */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary), #ff6b9d);
  padding: 5rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 4rem 0;
}

.cta-banner::before {
  content: '◆';
  position: absolute;
  font-size: 20rem;
  color: rgba(255, 255, 255, 0.05);
  top: -50%;
  right: -10%;
  animation: rotate-slow 30s linear infinite;
}

.cta-banner h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  color: var(--color-bg);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(10, 10, 15, 0.8);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn {
  background: var(--color-bg);
  color: var(--color-text);
  border: 2px solid var(--color-bg);
  position: relative;
  z-index: 1;
}

.cta-banner .btn:hover {
  background: transparent;
  color: var(--color-bg);
}

/* SITE FOOTER */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-brand .logo {
  font-size: 1.5rem;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-col a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* UTILITY */
.text-accent {
  color: var(--color-primary);
}

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

.seo-description {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ANIMATIONS */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content p {
    margin: 0 auto 2.5rem;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-image {
    display: none;
  }
  
  .feature-block {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .feature-image {
    order: -1;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }
  
  .header-inner {
    padding: 1rem 1.5rem;
  }
  
  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(10, 10, 15, 0.98);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    z-index: 999;
  }
  
  .main-nav.active {
    display: flex;
  }
  
  .main-nav a {
    font-size: 1.5rem;
  }
  
  .menu-toggle {
    display: block;
    z-index: 1000;
  }
  
  .hero {
    padding: 6rem 0 3rem;
    min-height: auto;
  }
  
  .hero-content h1 {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }
  
  .section {
    padding: 4rem 0;
  }
  
  .section-title {
    font-size: clamp(2rem, 8vw, 3rem);
  }
  
  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }
  
  .stat-item::after {
    display: none;
  }
  
  .content-wall {
    grid-template-columns: 1fr;
  }
  
  .cta-banner {
    padding: 3rem 1.5rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .header-inner {
    padding: 0.8rem 1rem;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .hero-content h1 {
    font-size: 2.2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    justify-content: center;
    padding: 0.9rem 1.5rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-bar {
    grid-template-columns: 1fr;
  }
  
  .stat-number {
    font-size: 2.5rem;
  }
  
  .cta-banner h2 {
    font-size: 1.8rem;
  }
}