:root {
  --primary: #0f0f1a;
  --secondary: #ff3d5a;
  --accent: #00f5ff;
  --accent2: #ffd700;
  --bg: #05050a;
  --surface: #14141f;
  --text: #f0f0f5;
  --text-muted: #8888a0;
  --radius: 0;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  letter-spacing: 0.02em;
}

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

::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--accent);
}

/* ===== CONTAINER ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(5, 5, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 61, 90, 0.15);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(5, 5, 10, 0.97);
  border-bottom-color: var(--secondary);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  min-height: 70px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  z-index: 2;
  text-shadow: 0 0 40px rgba(0, 245, 255, 0.3);
  transition: var(--transition);
}

.logo::after {
  content: '™';
  font-size: 0.5rem;
  vertical-align: super;
  -webkit-text-fill-color: var(--secondary);
  margin-left: 2px;
}

.main-nav {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  align-items: center;
}

.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  position: relative;
  transition: var(--transition);
  border-radius: 0;
  text-transform: uppercase;
}

.main-nav a::before {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 1.2rem;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

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

.main-nav a:hover::before {
  width: calc(100% - 2.4rem);
}

.main-nav a.active {
  color: var(--accent);
}

.main-nav a.active::before {
  width: calc(100% - 2.4rem);
  background: var(--secondary);
}

.nav-cta {
  background: transparent;
  border: 1px solid var(--secondary);
  color: var(--secondary) !important;
  padding: 0.5rem 1.8rem !important;
  font-weight: 700 !important;
  transition: var(--transition) !important;
  text-transform: uppercase;
  font-size: 0.75rem !important;
  letter-spacing: 0.15em;
}

.nav-cta:hover {
  background: var(--secondary) !important;
  color: var(--primary) !important;
  box-shadow: 0 0 30px rgba(255, 61, 90, 0.3);
}

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

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 2rem;
  cursor: pointer;
  z-index: 1001;
  padding: 0.25rem;
  line-height: 1;
  transition: var(--transition);
}

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

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 8rem 0 4rem;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 20% 50%, rgba(255, 61, 90, 0.08), transparent 70%),
              radial-gradient(ellipse 60% 50% at 80% 30%, rgba(0, 245, 255, 0.06), transparent 60%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  height: 120%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 40px,
    rgba(255, 61, 90, 0.02) 40px,
    rgba(255, 61, 90, 0.02) 41px
  );
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0, 245, 255, 0.25);
  padding: 0.35rem 1.2rem;
  margin-bottom: 2rem;
  background: rgba(0, 245, 255, 0.05);
  animation: fadeSlideUp 0.8s ease-out;
}

.hero h1 {
  font-size: clamp(2.8rem, 8vw, 6rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  animation: fadeSlideUp 0.8s ease-out 0.15s both;
}

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

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
  animation: fadeSlideUp 0.8s ease-out 0.3s both;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeSlideUp 0.8s ease-out 0.45s both;
}

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  height: 60%;
  background: linear-gradient(135deg, rgba(255, 61, 90, 0.2), rgba(0, 245, 255, 0.1));
  clip-path: polygon(20% 0%, 100% 0%, 80% 100%, 0% 100%);
  z-index: 1;
  opacity: 0.6;
  animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 2.5rem;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  background: transparent;
  color: var(--text);
}

.btn-primary {
  background: var(--secondary);
  color: var(--primary);
  box-shadow: 0 0 30px rgba(255, 61, 90, 0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(255, 61, 90, 0.35);
  background: #ff5770;
}

.btn-outline {
  border: 1px solid var(--text-muted);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 30px rgba(0, 245, 255, 0.15);
  transform: translateY(-2px);
}

/* ===== SECTION ===== */
.section {
  padding: 7rem 0;
  position: relative;
}

.section:nth-child(odd) {
  background: var(--surface);
}

.section-label {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--secondary);
  padding-bottom: 0.35rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.2rem;
  text-transform: uppercase;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 3rem;
}

/* ===== CARDS GRID ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.category-card {
  background: var(--primary);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 2.5rem 2rem;
  transition: var(--transition);
  position: relative;
  cursor: pointer;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.category-card:hover {
  border-color: rgba(255, 61, 90, 0.2);
  transform: translateY(-6px);
  background: #1a1a2e;
}

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

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 1.2rem;
  display: block;
  color: var(--accent);
  transition: var(--transition);
}

.category-card:hover .card-icon {
  color: var(--secondary);
  transform: scale(1.1);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.category-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

.card-link::after {
  content: '→';
  transition: var(--transition);
}

.category-card:hover .card-link {
  color: var(--secondary);
  gap: 0.8rem;
}

.category-card:hover .card-link::after {
  transform: translateX(4px);
}

/* ===== FEATURE BLOCK ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 2rem;
}

.feature-image {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(255, 61, 90, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 95% 100%, 0% 100%);
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(255, 61, 90, 0.03) 20px,
    rgba(255, 61, 90, 0.03) 21px
  );
}

.feature-text {
  padding: 1rem 0;
}

.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.feature-text p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

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

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text);
}

.feature-list li::before {
  content: '✦';
  color: var(--accent);
  font-size: 0.7rem;
}

/* ===== STATS BAR ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  background: rgba(255, 61, 90, 0.1);
  border: 1px solid rgba(255, 61, 90, 0.1);
  padding: 0;
  margin: 3rem 0;
}

.stat-item {
  background: var(--primary);
  padding: 2.5rem 1.5rem;
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.stat-item:hover {
  background: var(--surface);
}

.stat-number {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ===== CONTENT WALL ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.content-wall-item {
  background: var(--primary);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
}

.content-wall-item:hover {
  border-color: rgba(0, 245, 255, 0.2);
  transform: translateY(-4px);
}

.content-wall-item .date {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: block;
}

.content-wall-body h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.content-wall-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.content-wall-body a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--transition);
}

.content-wall-body a:hover {
  color: var(--secondary);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 2rem auto 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.faq-item {
  background: var(--primary);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 1.5rem 2rem;
  cursor: pointer;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(0, 245, 255, 0.15);
}

.faq-item h4 {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.faq-item h4::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent);
  transition: var(--transition);
  font-weight: 300;
}

.faq-item.active h4::after {
  content: '−';
  color: var(--secondary);
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, padding 0.4s ease;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-top: 1.2rem;
}

/* ===== CTA BANNER ===== */
.cta-banner {
  background: linear-gradient(135deg, rgba(255, 61, 90, 0.1), rgba(0, 245, 255, 0.05));
  border: 1px solid rgba(255, 61, 90, 0.15);
  padding: 4rem 3rem;
  text-align: center;
  margin: 3rem 0;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 30px,
    rgba(255, 61, 90, 0.02) 30px,
    rgba(255, 61, 90, 0.02) 31px
  );
  pointer-events: none;
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 1rem;
  position: relative;
  z-index: 1;
}

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

/* ===== FOOTER ===== */
.site-footer {
  background: var(--primary);
  border-top: 1px solid rgba(255, 61, 90, 0.1);
  padding: 4rem 0 2rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.footer-brand .logo {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--text);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

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

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

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

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

.seo-description {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 800px;
  margin: 2rem auto;
  padding: 1.5rem;
  border-left: 2px solid var(--secondary);
  background: rgba(255, 61, 90, 0.03);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .feature-image {
    clip-path: none;
    aspect-ratio: 16/9;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.25rem;
  }

  .site-header {
    padding: 0;
  }

  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(5, 5, 10, 0.98);
    backdrop-filter: blur(30px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    transform: translateX(100%);
    transition: var(--transition);
    z-index: 999;
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav a {
    font-size: 1.2rem;
    padding: 0.8rem 2rem;
  }

  .main-nav a::before {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 6rem 0 3rem;
    min-height: auto;
  }

  .hero-image {
    display: none;
  }

  .hero h1 {
    font-size: clamp(2rem, 10vw, 3.5rem);
  }

  .hero-buttons {
    flex-direction: column;
    gap: 0.8rem;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .section {
    padding: 4rem 0;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .content-wall {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  .stat-item {
    padding: 1.5rem 1rem;
  }

  .cta-banner {
    padding: 2.5rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .header-inner {
    padding: 0.5rem 0;
    min-height: 60px;
  }

  .logo {
    font-size: 1.3rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .category-card {
    padding: 1.5rem;
  }

  .faq-item {
    padding: 1rem 1.2rem;
  }

  .cta-banner h2 {
    font-size: 1.4rem;
  }

  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.7rem;
  }
}

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

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.hero .btn-primary {
  animation: float 3s ease-in-out infinite;
}

.section-title {
  background: linear-gradient(135deg, var(--text), var(--accent), var(--text));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 6s linear infinite;
}