:root {
  --bg-primary: #0b0b0f;
  --bg-secondary: #12121a;
  --bg-card: #14141c;
  --bg-panel: #1a1a24;
  --bg-hover: #1e1e2a;
  --border-color: #262633;
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b0;
  --text-muted: #6e6e80;
  --accent-cyan: #22d3ee;
  --accent-purple: #a855f7;
  --accent-gradient: linear-gradient(135deg, #22d3ee 0%, #a855f7 100%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(168,85,247,0.25);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
input, select, textarea {
  font-family: inherit;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
@media (min-width: 768px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}
.section {
  padding: 70px 0;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  padding: 5px 16px;
  border-radius: 50px;
  margin-bottom: 14px;
  font-weight: 600;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}
@media (max-width: 768px) {
  .section-title {
    font-size: 1.5rem;
  }
  .section {
    padding: 50px 0;
  }
}

/* Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 11, 15, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}
.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0.8;
}
.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  flex-shrink: 0;
  box-shadow: 0 0 18px rgba(168, 85, 247, 0.35);
}
.logo-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}
.nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(34,211,238,0.12), rgba(168,85,247,0.12));
  box-shadow: inset 0 0 0 1px rgba(34,211,238,0.25);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(168,85,247,0.5);
}
.nav-cta {
  margin-left: 12px;
  padding: 9px 20px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent-gradient);
  box-shadow: 0 4px 14px rgba(168, 85, 247, 0.25);
  transition: var(--transition);
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(168, 85, 247, 0.4);
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1.2rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
}
@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 70px;
    right: -100%;
    flex-direction: column;
    align-items: stretch;
    background: rgba(15, 15, 22, 0.98);
    backdrop-filter: blur(16px);
    padding: 20px;
    gap: 8px;
    width: 260px;
    height: calc(100vh - 70px);
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -8px 0 30px rgba(0,0,0,0.5);
    border-left: 1px solid var(--border-color);
    z-index: 999;
  }
  .main-nav.open {
    right: 0;
  }
  .menu-toggle {
    display: flex;
  }
  .nav-cta {
    margin-left: 0;
    margin-top: 8px;
    text-align: center;
  }
  .logo-text {
    font-size: 0.9rem;
  }
}

/* Hero */
.hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.jpg') center center / cover no-repeat;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 80px 0 60px;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,11,15,0.82) 0%, rgba(11,11,15,0.6) 50%, rgba(11,11,15,0.88) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 18px;
  border-radius: 50px;
  background: linear-gradient(135deg, rgba(34,211,238,0.12), rgba(168,85,247,0.12));
  border: 1px solid rgba(34,211,238,0.25);
  color: #cbefff;
  margin-bottom: 22px;
  letter-spacing: 1px;
}
.hero-badge i {
  font-size: 0.7rem;
  color: var(--accent-cyan);
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -1px;
  margin-bottom: 22px;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.hero-sub {
  font-size: 1.08rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 44px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(168, 85, 247, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(168, 85, 247, 0.45);
}
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--accent-cyan);
  background: rgba(34,211,238,0.08);
  transform: translateY(-2px);
}
.btn-play {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
.btn-play:hover {
  background: var(--accent-purple);
  border-color: var(--accent-purple);
  transform: scale(1.1);
  box-shadow: 0 0 30px rgba(168,85,247,0.5);
}
.hero-data {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px 48px;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 32px;
}
.hero-data-item {
  text-align: center;
}
.hero-data-item strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-data-item span {
  font-size: 0.85rem;
  color: var(--text-muted);
}
@media (max-width: 768px) {
  .hero { min-height: 520px; padding: 70px 0 50px; }
  .hero h1 { font-size: 1.7rem; }
  .hero-sub { font-size: 0.95rem; }
  .hero-data { gap: 20px 32px; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.4rem; }
  .btn { padding: 12px 22px; font-size: 0.88rem; }
}

/* Stats band */
.stats-band {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 32px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-cell {
  text-align: center;
  padding: 10px;
}
.stat-cell .stat-icon {
  font-size: 1.4rem;
  color: var(--accent-cyan);
  margin-bottom: 6px;
}
.stat-cell strong {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-cell span {
  font-size: 0.85rem;
  color: var(--text-muted);
}
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Category cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  transition: var(--transition);
  min-height: 320px;
  display: flex;
  align-items: flex-end;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  border-color: rgba(34,211,238,0.35);
}
.category-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.category-card .cat-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,11,15,0.1) 0%, rgba(11,11,15,0.9) 100%);
  z-index: 1;
  transition: var(--transition);
}
.category-card:hover .cat-overlay {
  background: linear-gradient(180deg, rgba(11,11,15,0.1) 0%, rgba(11,11,15,0.92) 100%);
}
.cat-content {
  position: relative;
  z-index: 2;
  padding: 32px;
  width: 100%;
}
.cat-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}
.cat-content p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 16px;
  line-height: 1.6;
}
.cat-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-cyan);
}
.cat-link:hover {
  gap: 14px;
}
.cat-link i {
  font-size: 0.8rem;
}
@media (max-width: 768px) {
  .category-grid { grid-template-columns: 1fr; }
}

/* Service matrix */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}
.service-card:hover::before {
  opacity: 1;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  background: var(--bg-hover);
}
.service-card .s-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(34,211,238,0.15), rgba(168,85,247,0.15));
  border: 1px solid rgba(34,211,238,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent-cyan);
  margin-bottom: 18px;
}
.service-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.service-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
@media (max-width: 992px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .service-grid { grid-template-columns: 1fr; }
}

/* Resource cards */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.resource-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.resource-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  border-color: rgba(34,211,238,0.3);
}
.resource-card .rc-cover {
  height: 160px;
  overflow: hidden;
  position: relative;
}
.resource-card .rc-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.resource-card:hover .rc-cover img {
  transform: scale(1.05);
}
.resource-card .rc-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(11,11,15,0.6));
}
.rc-body {
  padding: 20px;
}
.rc-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-cyan);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.15);
  padding: 3px 10px;
  border-radius: 50px;
  margin-bottom: 10px;
}
.rc-body h5 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.rc-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.rc-meta {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 12px;
}
.rc-meta i {
  font-size: 0.75rem;
  margin-right: 4px;
  color: var(--accent-purple);
}
@media (max-width: 992px) {
  .resource-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .resource-grid { grid-template-columns: 1fr; }
}

/* Compare */
.compare-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.compare-box {
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-color);
}
.compare-box.traditional {
  background: rgba(255,255,255,0.02);
}
.compare-box.modern {
  background: linear-gradient(135deg, rgba(34,211,238,0.06), rgba(168,85,247,0.06));
  border-color: rgba(34,211,238,0.25);
}
.compare-box h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-box.traditional h4 { color: var(--text-secondary); }
.compare-box.modern h4 { color: #fff; }
.compare-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.compare-box li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.6;
}
.compare-box li i {
  font-size: 0.85rem;
  margin-top: 4px;
}
.compare-box.traditional li i { color: #f87171; }
.compare-box.modern li i { color: #34d399; }
.compare-box.modern li { color: var(--text-primary); }
@media (max-width: 768px) {
  .compare-grid { grid-template-columns: 1fr; }
}

/* Info area */
.info-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 28px;
}
.info-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  overflow: hidden;
}
.info-item {
  display: block;
  padding: 22px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
  position: relative;
}
.info-item:last-child {
  border-bottom: none;
}
.info-item:hover {
  background: var(--bg-hover);
  padding-left: 32px;
}
.info-item h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  transition: var(--transition);
}
.info-item:hover h5 {
  color: var(--accent-cyan);
}
.info-item .ii-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}
.info-item .ii-meta i {
  font-size: 0.7rem;
  margin-right: 4px;
  color: var(--accent-purple);
}
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.side-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.side-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-card h4 i {
  color: var(--accent-cyan);
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-chip {
  font-size: 0.8rem;
  padding: 5px 14px;
  border-radius: 50px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition);
}
.tag-chip:hover {
  border-color: var(--accent-purple);
  color: #fff;
  background: rgba(168,85,247,0.15);
}
.side-card .hot-post {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  line-height: 1.5;
  display: block;
}
.side-card .hot-post:last-child {
  border: none;
}
.side-card .hot-post:hover {
  color: var(--accent-cyan);
}
.side-card .hot-post .hp-tag {
  font-size: 0.7rem;
  color: var(--accent-purple);
  margin-right: 6px;
}
@media (max-width: 992px) {
  .info-layout { grid-template-columns: 1fr; }
}

/* FAQ */
.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active {
  border-color: rgba(34,211,238,0.3);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.faq-q {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
  cursor: pointer;
}
.faq-q:hover {
  color: var(--accent-cyan);
}
.faq-q .faq-icon {
  font-size: 0.8rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  transform: rotate(180deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-a-inner {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* CTA form */
.cta-section {
  background: url('/assets/images/backpic/back-2.jpg') center center / cover no-repeat;
  position: relative;
  padding: 80px 0;
}
.cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,11,15,0.92) 0%, rgba(11,11,15,0.8) 100%);
}
.cta-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.cta-text h2 {
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}
.cta-text p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.7;
  margin-bottom: 24px;
}
.cta-points {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cta-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-primary);
}
.cta-points li i {
  color: #34d399;
  font-size: 0.9rem;
}
.cta-form-box {
  background: rgba(20, 20, 28, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
}
.cta-form-box h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.cta-form-box .form-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: var(--transition);
  appearance: none;
}
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
}
.form-group textarea {
  resize: vertical;
  min-height: 80px;
}
.form-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.form-check-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}
.form-check-label input {
  accent-color: var(--accent-purple);
}
.form-check-label:hover {
  border-color: var(--accent-cyan);
}
.btn-submit {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(168, 85, 247, 0.3);
  transition: var(--transition);
  cursor: pointer;
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(168, 85, 247, 0.45);
}
.form-success {
  display: none;
  text-align: center;
  padding: 30px 0;
  color: #34d399;
}
.form-success i {
  font-size: 2rem;
  margin-bottom: 12px;
}
@media (max-width: 992px) {
  .cta-grid { grid-template-columns: 1fr; }
}

/* Footer */
.site-footer {
  background: #08080c;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h5 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 0.87rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--accent-cyan);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.footer-bottom a {
  color: var(--text-secondary);
}
.footer-bottom a:hover {
  color: var(--accent-cyan);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* Floating action */
.floating-bar {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 10px;
}
.floating-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 6px 20px rgba(168, 85, 247, 0.35);
  transition: var(--transition);
  cursor: pointer;
}
.floating-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(168, 85, 247, 0.5);
}
@media (max-width: 520px) {
  .floating-bar { bottom: 16px; right: 16px; }
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #161f2e;
    --bg-elevated: #1b2536;
    --border-color: #1e293b;
    --border-light: #283548;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --neon-cyan: #22d3ee;
    --neon-pink: #e879f9;
    --neon-purple: #a855f7;
    --gradient-primary: linear-gradient(135deg, #22d3ee, #a855f7);
    --gradient-accent: linear-gradient(135deg, #e879f9, #22d3ee);
    --radius: 14px;
    --radius-lg: 22px;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
    --shadow-neon: 0 0 20px rgba(34, 211, 238, 0.18);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
  }

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

  a {
    color: inherit;
    text-decoration: none;
    transition: color 0.25s ease;
  }

  button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
  }

  input,
  textarea {
    font-family: inherit;
  }

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

  /* ===== Header / Nav ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.9);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(34, 211, 238, 0.12);
  }

  .site-header::after {
    content: '';
    display: block;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple), transparent);
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    opacity: 0.7;
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 16px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .logo-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 10px;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 0 18px rgba(34, 211, 238, 0.3);
  }

  .logo-text {
    font-size: 1.2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    white-space: nowrap;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .nav-link {
    padding: 8px 14px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
  }

  .nav-link:hover {
    color: var(--text-primary);
    background: rgba(34, 211, 238, 0.08);
  }

  .nav-link.active {
    color: var(--neon-cyan);
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 2px;
    height: 2px;
    background: var(--neon-cyan);
    border-radius: 2px;
    box-shadow: 0 0 10px var(--neon-cyan);
  }

  .nav-cta {
    padding: 9px 20px;
    background: var(--gradient-primary);
    color: #fff !important;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(34, 211, 238, 0.2);
    display: inline-block;
  }

  .nav-cta:hover {
    box-shadow: 0 6px 22px rgba(34, 211, 238, 0.4);
    transform: translateY(-2px);
    color: #fff;
  }

  .nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: rgba(34, 211, 238, 0.1);
    color: var(--neon-cyan);
    font-size: 18px;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
  }

  .nav-toggle:hover {
    background: rgba(34, 211, 238, 0.2);
  }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    padding: 80px 0 0;
    overflow: hidden;
  }

  .hero-mask {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 14, 23, 0.94) 0%, rgba(10, 14, 23, 0.78) 50%, rgba(10, 14, 23, 0.4) 100%);
  }

  .hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    width: 100%;
  }

  .hero-main {
    max-width: 620px;
    padding-bottom: 30px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(34, 211, 238, 0.12);
    border: 1px solid rgba(34, 211, 238, 0.3);
    color: var(--neon-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 30px;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
  }

  .hero-title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: 1px;
  }

  .hero-title .hero-dot {
    color: var(--neon-cyan);
    text-shadow: 0 0 18px var(--neon-cyan);
  }

  .hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
  }

  .hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
  }

  .btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 6px 24px rgba(34, 211, 238, 0.25);
  }

  .btn-primary:hover {
    box-shadow: 0 8px 32px rgba(34, 211, 238, 0.45);
    transform: translateY(-2px);
    color: #fff;
  }

  .btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
  }

  .btn-outline:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: var(--shadow-neon);
  }

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

  .hero-panel {
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
  }

  .panel-card {
    width: 340px;
    background: rgba(22, 31, 46, 0.85);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: var(--radius-lg);
    padding: 26px;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-card);
  }

  .panel-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
  }

  .panel-card h3 i {
    color: var(--neon-cyan);
  }

  .panel-card ul {
    list-style: none;
  }

  .panel-card li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.92rem;
    color: var(--text-secondary);
  }

  .panel-card li:last-child {
    border-bottom: none;
  }

  .panel-rank {
    font-weight: 800;
    color: var(--neon-pink);
    font-size: 0.85rem;
    flex-shrink: 0;
  }

  .panel-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--neon-cyan);
    transition: gap 0.3s ease;
  }

  .panel-btn:hover {
    gap: 12px;
  }

  .hero-tabbar {
    position: relative;
    z-index: 2;
    margin-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(10, 14, 23, 0.65);
    backdrop-filter: blur(8px);
    width: 100%;
  }

  .tabbar-inner {
    display: flex;
    gap: 8px;
    padding: 14px 24px;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
  }

  .tabbar-inner a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: all 0.3s ease;
  }

  .tabbar-inner a:hover {
    background: rgba(34, 211, 238, 0.1);
    color: var(--neon-cyan);
  }

  .tabbar-inner a i {
    color: var(--neon-cyan);
    font-size: 0.85rem;
  }

  /* ===== Section ===== */
  .section {
    padding: 80px 0;
  }

  .section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
  }

  .section-head .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--neon-cyan);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 6px 16px;
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 30px;
    background: rgba(34, 211, 238, 0.06);
    margin-bottom: 16px;
  }

  .section-head h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 14px;
  }

  .section-head p {
    color: var(--text-secondary);
    font-size: 1rem;
  }

  .section-head.row-style {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    text-align: left;
    max-width: 100%;
    gap: 24px;
  }

  .section-head.row-style p {
    max-width: 300px;
    text-align: right;
  }

  /* ===== metrics ===== */
  .metrics-section {
    padding: 80px 0 70px;
    position: relative;
    background: var(--bg-primary);
  }

  .metrics-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 40px;
    background: linear-gradient(var(--neon-cyan), transparent);
  }

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

  .metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 30px 24px;
    text-align: center;
    transition: all 0.35s ease;
    position: relative;
    overflow: hidden;
  }

  .metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0.6;
  }

  .metric-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: var(--shadow-neon);
  }

  .metric-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(34, 211, 238, 0.1);
    border-radius: 14px;
    color: var(--neon-cyan);
    font-size: 20px;
  }

  .metric-num {
    font-size: 2.4rem;
    font-weight: 900;
    line-height: 1.1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .metric-num span {
    font-size: 1.6rem;
  }

  .metric-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 8px;
  }

  /* ===== matrix ===== */
  .matrix-section {
    padding: 80px 0;
    background: rgba(17, 24, 39, 0.4);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }

  .matrix-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
  }

  .matrix-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: all 0.35s ease;
    position: relative;
  }

  .matrix-card:hover {
    transform: translateY(-5px);
    border-color: rgba(168, 85, 247, 0.4);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  }

  .matrix-card:hover .matrix-icon {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
  }

  .matrix-icon {
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(34, 211, 238, 0.1);
    border-radius: 14px;
    color: var(--neon-cyan);
    font-size: 22px;
    margin-bottom: 20px;
    transition: all 0.35s ease;
  }

  .matrix-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
  }

  .matrix-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 14px;
  }

  .matrix-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--neon-pink);
    transition: gap 0.3s ease;
    cursor: pointer;
  }

  .matrix-link:hover {
    gap: 12px;
  }

  .matrix-featured {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .featured-card {
    display: flex;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.35s ease;
  }

  .featured-card:hover {
    border-color: rgba(34, 211, 238, 0.35);
    transform: translateY(-4px);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.4);
  }

  .featured-card img {
    width: 45%;
    object-fit: cover;
    min-height: 200px;
  }

  .featured-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .featured-tag {
    display: inline-block;
    align-self: flex-start;
    background: rgba(168, 85, 247, 0.15);
    border: 1px solid rgba(168, 85, 247, 0.3);
    color: var(--neon-pink);
    font-size: 0.78rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 14px;
  }

  .featured-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .featured-body p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.65;
    margin-bottom: 14px;
  }

  .featured-meta {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
  }

  .featured-meta i {
    color: var(--neon-cyan);
    margin-right: 4px;
  }

  /* ===== comparison ===== */
  .comparison-section {
    padding: 80px 0;
    background: var(--bg-primary);
  }

  .comparison-grid {
    display: flex;
    align-items: stretch;
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
  }

  .compare-card {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    transition: all 0.3s ease;
  }

  .compare-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }

  .compare-bad {
    border-left: 4px solid #f43f5e;
  }

  .compare-good {
    border-left: 4px solid var(--neon-cyan);
  }

  .compare-card h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 22px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .compare-bad h3 i {
    color: #f43f5e;
  }

  .compare-good h3 i {
    color: var(--neon-cyan);
  }

  .compare-card ul {
    list-style: none;
  }

  .compare-card li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }

  .compare-card li:last-child {
    border-bottom: none;
  }

  .compare-card li i {
    margin-top: 3px;
    font-size: 0.9rem;
  }

  .compare-bad li i {
    color: #f43f5e;
  }

  .compare-good li i {
    color: var(--neon-cyan);
  }

  .compare-vs {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    flex-shrink: 0;
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--neon-pink);
    text-shadow: 0 0 16px rgba(232, 121, 249, 0.5);
  }

  /* ===== faq ===== */
  .faq-section {
    padding: 80px 0;
    background: rgba(17, 24, 39, 0.4);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
  }

  .faq-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.3s ease;
  }

  .faq-item:hover {
    border-color: rgba(34, 211, 238, 0.3);
  }

  .faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    transition: color 0.3s ease;
  }

  .faq-q i {
    color: var(--neon-cyan);
    font-size: 0.85rem;
    transition: transform 0.3s ease;
    flex-shrink: 0;
  }

  .faq-item.open .faq-q i {
    transform: rotate(180deg);
  }

  .faq-q:hover {
    color: var(--neon-cyan);
  }

  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  .faq-item.open .faq-a {
    max-height: 300px;
  }

  .faq-a p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.75;
  }

  /* ===== cta / form ===== */
  .cta-section {
    padding: 80px 0;
    position: relative;
    background: var(--bg-primary);
  }

  .cta-box {
    display: flex;
    gap: 40px;
    background: var(--bg-elevated);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
  }

  .cta-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
  }

  .cta-info {
    flex: 1;
  }

  .cta-info h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 14px;
  }

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

  .cta-info ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .cta-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
  }

  .cta-info li i {
    color: var(--neon-cyan);
    font-size: 0.9rem;
  }

  .cta-form {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .cta-form input,
  .cta-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(10, 14, 23, 0.6);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    outline: none;
  }

  .cta-form input:focus,
  .cta-form textarea:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12);
  }

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

  .cta-form textarea {
    resize: vertical;
    min-height: 100px;
  }

  .cta-form .btn-block {
    margin-top: 4px;
  }

  .form-note {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-align: center;
  }

  /* ===== footer ===== */
  .site-footer {
    background: #0d1220;
    border-top: 1px solid rgba(34, 211, 238, 0.15);
    padding: 56px 0 24px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
  }

  .footer-brand .logo {
    margin-bottom: 14px;
  }

  .footer-brand p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.75;
    max-width: 360px;
  }

  .footer-col h5 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
  }

  .footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-col li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color 0.3s ease;
  }

  .footer-col li a:hover {
    color: var(--neon-cyan);
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.88rem;
  }

  .footer-bottom a {
    color: var(--text-muted);
  }

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

  /* ===== responsive ===== */
  @media (max-width: 1024px) {
    .metrics-grid {
      grid-template-columns: repeat(2, 1fr);
    }

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

    .hero-content {
      flex-direction: column;
    }

    .hero-panel {
      justify-content: flex-start;
      width: 100%;
    }

    .panel-card {
      width: 100%;
      max-width: 480px;
    }

    .hero {
      min-height: auto;
      padding: 60px 0 0;
    }

    .hero-main {
      max-width: 100%;
    }
  }

  @media (max-width: 768px) {
    .site-header {
      height: auto;
    }

    .header-inner {
      height: 64px;
    }

    .nav-toggle {
      display: flex;
    }

    .main-nav {
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      background: rgba(10, 14, 23, 0.97);
      flex-direction: column;
      padding: 20px;
      gap: 12px;
      border-bottom: 1px solid rgba(34, 211, 238, 0.2);
      transform: translateY(-20px);
      opacity: 0;
      visibility: hidden;
      transition: all 0.35s ease;
    }

    .main-nav.open {
      transform: translateY(0);
      opacity: 1;
      visibility: visible;
    }

    .nav-link,
    .nav-cta {
      width: 100%;
      text-align: center;
    }

    .logo-text {
      font-size: 1rem;
    }

    .hero-title {
      font-size: 2rem;
    }

    .hero-subtitle {
      font-size: 0.98rem;
    }

    .hero-tabbar .tabbar-inner {
      padding: 10px 16px;
    }

    .section {
      padding: 56px 0;
    }

    .metrics-grid,
    .matrix-grid,
    .matrix-featured,
    .comparison-grid {
      grid-template-columns: 1fr;
    }

    .compare-grid {
      flex-direction: column;
    }

    .compare-vs {
      width: auto;
      padding: 8px 0;
    }

    .cta-box {
      flex-direction: column;
      padding: 32px 24px;
    }

    .section-head.row-style {
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .section-head.row-style p {
      text-align: left;
    }

    .featured-card {
      flex-direction: column;
    }

    .featured-card img {
      width: 100%;
      min-height: 180px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 24px;
    }
  }

  @media (max-width: 520px) {
    .container {
      padding: 0 16px;
    }

    .logo-icon {
      width: 34px;
      height: 34px;
      font-size: 15px;
    }

    .logo-text {
      font-size: 0.95rem;
    }

    .hero {
      padding: 48px 0 0;
    }

    .hero-badge {
      font-size: 0.78rem;
    }

    .hero-title {
      font-size: 1.7rem;
    }

    .hero-actions {
      flex-direction: column;
    }

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

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

    .metric-num {
      font-size: 2rem;
    }

    .cta-box {
      padding: 28px 20px;
    }

    .faq-q {
      font-size: 0.92rem;
      padding: 16px 18px;
    }

    .faq-a p {
      padding: 0 18px 16px;
    }
  }

:root{
  --bg-dark:#09090b;
  --bg-panel:#101014;
  --bg-card:#131318;
  --bg-hover:#1a1a21;
  --primary:#00e5ff;
  --secondary:#a855f7;
  --accent:#f59e0b;
  --text-main:#f4f4f5;
  --text-muted:#a1a1aa;
  --text-dim:#6a6a72;
  --border-color:#26262c;
  --border-glow:rgba(0,229,255,.35);
  --radius-md:12px;
  --radius-lg:18px;
  --radius-xl:24px;
  --shadow-1:0 4px 20px rgba(0,0,0,.4);
  --shadow-glow:0 0 30px rgba(0,229,255,.12);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --container-w:1240px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg-dark);color:var(--text-main);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:all .25s ease}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
img{max-width:100%;display:block}
button{border:none;background:none;cursor:pointer;font-family:inherit}
ul,ol{list-style:none}
.container{max-width:var(--container-w);margin:0 auto;padding:0 24px}
section{position:relative}

/* header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(9,9,11,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border-color);
  transition:box-shadow .3s;
}
.site-header.scrolled{box-shadow:0 8px 32px rgba(0,0,0,.55)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:18px;letter-spacing:.5px;flex-shrink:0}
.logo-icon{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--secondary));color:#0b0b0f;font-size:18px;
  box-shadow:0 0 18px rgba(0,229,255,.3);}
.logo-text{white-space:nowrap;background:linear-gradient(90deg,#fff,#e4e4ef);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{display:inline-flex;align-items:center;padding:10px 18px;border-radius:999px;font-size:14px;font-weight:500;color:var(--text-muted);position:relative;transition:all .25s}
.nav-link::after{content:"";position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--secondary));transition:width .3s}
.nav-link:hover{color:var(--text-main);background:rgba(255,255,255,.04)}
.nav-link:hover::after{width:60%}
.nav-link.active{color:#fff;background:rgba(0,229,255,.08);box-shadow:inset 0 0 0 1px rgba(0,229,255,.2);text-shadow:0 0 12px rgba(0,229,255,.4)}
.nav-link.active::after{width:70%}
.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:999px;font-size:14px;font-weight:700;color:#0b0b0f;
  background:linear-gradient(90deg,var(--primary),var(--secondary));box-shadow:0 0 20px rgba(0,229,255,.25);transition:all .3s;margin-left:8px}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(0,229,255,.4);color:#0b0b0f}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.05);color:var(--text-main);font-size:20px;align-items:center;justify-content:center;border:1px solid var(--border-color)}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .main-nav{position:fixed;top:72px;left:0;right:0;background:rgba(9,9,11,.97);flex-direction:column;padding:20px 24px;gap:8px;border-bottom:1px solid var(--border-color);transform:translateY(-120%);transition:transform .35s ease;opacity:0;visibility:hidden;max-height:calc(100vh-72px);overflow-y:auto}
  .main-nav.open{transform:translateY(0);opacity:1;visibility:visible}
  .nav-link,.nav-cta{width:100%;justify-content:center;border-radius:12px}
  .nav-link{margin:0}
  .nav-cta{margin:12px 0 4px}
}

/* hero */
.hero{
  min-height:92vh;display:flex;align-items:center;position:relative;
  background:linear-gradient(rgba(9,9,11,.7),rgba(9,9,11,.85)),url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  padding:140px 0 90px;overflow:hidden;
}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 70% 40%,rgba(0,229,255,.12),transparent 55%),radial-gradient(ellipse at 85% 75%,rgba(168,85,247,.1),transparent 50%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:10px;padding:8px 18px;border-radius:999px;background:rgba(0,229,255,.08);border:1px solid rgba(0,229,255,.25);font-size:13px;letter-spacing:1px;color:var(--primary);margin-bottom:22px;backdrop-filter:blur(6px)}
.hero-badge i{font-size:14px}
.hero h1{font-size:clamp(38px,5.5vw,66px);font-weight:900;line-height:1.15;letter-spacing:-1px;margin-bottom:18px}
.hero h1 .text-gradient{background:linear-gradient(90deg,var(--primary),var(--secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:17px;color:var(--text-muted);max-width:640px;line-height:1.8;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.btn-primary{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;border-radius:999px;font-size:15px;font-weight:700;color:#0b0b0f;background:linear-gradient(90deg,var(--primary),var(--secondary));box-shadow:0 4px 24px rgba(0,229,255,.3);transition:all .3s;border:none}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 36px rgba(0,229,255,.45)}
.btn-ghost{display:inline-flex;align-items:center;gap:10px;padding:14px 30px;border-radius:999px;font-size:15px;font-weight:600;color:var(--text-main);background:rgba(255,255,255,.04);border:1px solid var(--border-color);backdrop-filter:blur(6px);transition:all .3s}
.btn-ghost:hover{border-color:rgba(0,229,255,.4);background:rgba(0,229,255,.06);transform:translateY(-3px)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:56px;padding-top:36px;border-top:1px solid rgba(255,255,255,.06)}
.hero-stat{text-align:center}
.hero-stat .num{font-size:30px;font-weight:900;background:linear-gradient(90deg,#fff,var(--primary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-stat .label{font-size:13px;color:var(--text-dim);margin-top:4px}
@media(max-width:768px){.hero-stats{grid-template-columns:repeat(2,1fr)}.hero{padding-top:120px}}

/* section common */
.section-pad{padding:96px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-tag{display:inline-block;padding:6px 16px;border-radius:999px;background:rgba(168,85,247,.1);border:1px solid rgba(168,85,247,.3);font-size:12px;letter-spacing:2px;color:var(--secondary);margin-bottom:16px;text-transform:uppercase}
.section-title{font-size:clamp(30px,4vw,42px);font-weight:800;line-height:1.3;margin-bottom:14px;letter-spacing:-.5px}
.section-title .line-glow{background:linear-gradient(90deg,var(--primary),var(--secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.section-sub{color:var(--text-muted);font-size:15px;line-height:1.8}

/* stats band */
.stats-band{background:linear-gradient(135deg,var(--bg-panel),#0d0d14);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:56px 0}
.stat-card{background:rgba(255,255,255,.02);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;transition:all .35s;position:relative;overflow:hidden}
.stat-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--secondary));opacity:0;transition:opacity .3s}
.stat-card:hover{transform:translateY(-6px);border-color:rgba(0,229,255,.3);box-shadow:0 12px 40px rgba(0,0,0,.4),var(--shadow-glow)}
.stat-card:hover::before{opacity:1}
.stat-card .icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px;background:linear-gradient(135deg,rgba(0,229,255,.12),rgba(168,85,247,.12));color:var(--primary);margin:0 auto 16px;border:1px solid rgba(0,229,255,.2)}
.stat-card .num{font-size:32px;font-weight:900;color:#fff;line-height:1.1}
.stat-card .num span{font-size:18px;color:var(--primary);margin-left:2px}
.stat-card .name{font-size:14px;color:var(--text-muted);margin-top:8px}
@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr);padding:40px 0}}

/* service matrix */
.service-matrix{background:var(--bg-dark)}
.matrix-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.matrix-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;transition:all .35s;display:flex;flex-direction:column}
.matrix-card:hover{transform:translateY(-8px);border-color:rgba(0,229,255,.35);box-shadow:0 16px 50px rgba(0,0,0,.45),0 0 30px rgba(0,229,255,.08)}
.matrix-card .thumb{height:180px;overflow:hidden;position:relative}
.matrix-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.matrix-card:hover .thumb img{transform:scale(1.08)}
.matrix-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(13,13,18,.95))}
.matrix-card .tag{position:absolute;top:14px;left:14px;z-index:2;padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;background:rgba(9,9,11,.7);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.15);color:#fff}
.matrix-card .tag.hot{background:rgba(245,158,11,.85);color:#0b0b0f;border-color:transparent}
.matrix-card .body{padding:22px 20px 24px;flex:1;display:flex;flex-direction:column}
.matrix-card h3{font-size:18px;font-weight:700;margin-bottom:8px;color:#fff}
.matrix-card p{font-size:13px;color:var(--text-muted);line-height:1.7;flex:1}
.matrix-card .meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.matrix-card .meta span{font-size:11px;padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.04);border:1px solid var(--border-color);color:var(--text-muted)}
.matrix-card .footer-link{margin-top:16px;display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--primary);transition:gap .3s}
.matrix-card .footer-link:hover{gap:12px;color:var(--secondary)}
@media(max-width:1024px){.matrix-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.matrix-grid{grid-template-columns:1fr}}

/* compare section */
.compare-section{background:linear-gradient(180deg,var(--bg-panel),var(--bg-dark));border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}
.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.compare-card{background:rgba(255,255,255,.02);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:32px 28px;transition:all .35s;position:relative;overflow:hidden}
.compare-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),var(--secondary));opacity:0;transition:opacity .3s}
.compare-card:hover{transform:translateY(-8px);border-color:rgba(168,85,247,.35);box-shadow:0 16px 48px rgba(0,0,0,.5);}
.compare-card:hover::before{opacity:1}
.compare-card .rank-icon{width:58px;height:58px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:20px;background:linear-gradient(135deg,rgba(0,229,255,.14),rgba(168,85,247,.14));border:1px solid rgba(0,229,255,.2);color:var(--primary)}
.compare-card h3{font-size:20px;font-weight:800;margin-bottom:6px;color:#fff}
.compare-card .sub{font-size:13px;color:var(--text-muted);margin-bottom:20px}
.compare-list{border-top:1px solid var(--border-color);padding-top:16px}
.compare-row{display:flex;justify-content:space-between;align-items:center;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.04);font-size:13px}
.compare-row:last-child{border-bottom:none}
.compare-row .k{color:var(--text-muted)}
.compare-row .v{font-weight:600;color:var(--text-main)}
.compare-row .v .fa-star,.compare-row .v .fa-star-half-alt{color:var(--accent);font-size:11px;margin-right:1px}
.score-bar{display:flex;align-items:center;gap:12px;padding:14px 0 0;margin-top:14px;border-top:1px solid rgba(255,255,255,.04)}
.score-bar .label{font-size:12px;color:var(--text-dim);white-space:nowrap}
.score-track{flex:1;height:6px;background:rgba(255,255,255,.06);border-radius:99px;overflow:hidden}
.score-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--primary),var(--secondary));box-shadow:0 0 12px rgba(0,229,255,.4)}
.score-num{font-size:15px;font-weight:800;color:var(--primary);white-space:nowrap}
@media(max-width:1024px){.compare-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}}
@media(max-width:768px){.compare-grid{grid-template-columns:1fr}}

/* faq */
.faq-section{background:var(--bg-dark)}
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);margin-bottom:14px;overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:rgba(0,229,255,.25)}
.faq-item.open{border-color:rgba(0,229,255,.35)}
.faq-q{display:flex;align-items:center;gap:16px;padding:20px 24px;cursor:pointer;user-select:none}
.faq-q .q-icon{width:36px;height:36px;border-radius:10px;background:rgba(0,229,255,.08);border:1px solid rgba(0,229,255,.2);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:14px;flex-shrink:0}
.faq-q .q-text{flex:1;font-size:16px;font-weight:600;color:var(--text-main);line-height:1.5}
.faq-q .q-arrow{color:var(--text-dim);transition:transform .3s}
.faq-item.open .q-arrow{transform:rotate(180deg);color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s}
.faq-item.open .faq-a{max-height:400px;padding:0 24px 22px}
.faq-a-inner{padding-left:52px;font-size:14px;color:var(--text-muted);line-height:1.8;border-top:1px solid rgba(255,255,255,.05);padding-top:16px}
@media(max-width:520px){.faq-q{padding:16px}.faq-a-inner{padding-left:0}}

/* cta form */
.cta-section{
  padding:110px 0;position:relative;
  background:linear-gradient(rgba(9,9,11,.72),rgba(9,9,11,.88)),url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
}
.cta-box{max-width:960px;margin:0 auto;background:rgba(13,13,18,.85);backdrop-filter:blur(12px);border:1px solid rgba(0,229,255,.2);border-radius:var(--radius-xl);padding:56px 48px;box-shadow:0 24px 80px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.04)}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.cta-left .section-tag{margin-bottom:14px}
.cta-left h2{font-size:32px;font-weight:800;line-height:1.3;margin-bottom:16px}
.cta-left p{color:var(--text-muted);font-size:14px;line-height:1.8;margin-bottom:28px}
.cta-points{display:flex;flex-direction:column;gap:14px}
.cta-point{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--text-main)}
.cta-point .pt-icon{width:30px;height:30px;border-radius:50%;background:rgba(0,229,255,.1);border:1px solid rgba(0,229,255,.25);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:12px;flex-shrink:0}
.cta-form{display:flex;flex-direction:column;gap:16px}
.cta-form .form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:640px){.cta-form .form-row{grid-template-columns:1fr}}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:12px;letter-spacing:1px;color:var(--text-muted);font-weight:600}
.form-group select,.form-group input[type="text"],.form-group textarea{
  background:rgba(255,255,255,.04);border:1px solid var(--border-color);border-radius:var(--radius-md);
  padding:12px 16px;font-size:14px;color:var(--text-main);transition:border-color .3s,box-shadow .3s;width:100%;font-family:inherit;
}
.form-group select:focus,.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,229,255,.12)}
.form-group select option{background:var(--bg-card);color:var(--text-main)}
.btn-submit{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 32px;border-radius:999px;font-size:15px;font-weight:700;color:#0b0b0f;background:linear-gradient(90deg,var(--primary),var(--secondary));border:none;box-shadow:0 4px 20px rgba(0,229,255,.25);transition:all .3s;width:100%}
.btn-submit:hover{transform:translateY(-3px);box-shadow:0 8px 32px rgba(0,229,255,.4)}
.cta-tip{font-size:12px;color:var(--text-dim);text-align:center;margin-top:4px}
@media(max-width:768px){.cta-grid{grid-template-columns:1fr;gap:36px}.cta-box{padding:40px 24px}}

/* footer */
.site-footer{background:rgba(9,9,11,.96);border-top:1px solid var(--border-color);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:44px;padding-bottom:48px}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{font-size:13px;color:var(--text-muted);line-height:1.8;max-width:420px;margin-top:14px}
.footer-col h5{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.5px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13px;color:var(--text-muted);display:inline-flex;align-items:center;gap:6px}
.footer-col a:hover{color:var(--primary);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.05);padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--text-dim)}
.footer-bottom a{color:var(--text-muted)}
.footer-bottom a:hover{color:var(--primary)}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;text-align:center}}

/* page hero for category */
.page-hero{
  padding:170px 0 80px;position:relative;overflow:hidden;
  background:linear-gradient(rgba(9,9,11,.65),rgba(9,9,11,.88)),url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 20% 30%,rgba(0,229,255,.1),transparent 50%),radial-gradient(ellipse at 80% 70%,rgba(168,85,247,.1),transparent 55%)}
.page-hero .hero-inner{position:relative;z-index:2;max-width:860px}
.page-hero .crumb{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-muted);margin-bottom:18px;letter-spacing:1px}
.page-hero .crumb a:hover{color:var(--primary)}
.page-hero .crumb i{font-size:10px;color:var(--text-dim)}
.page-hero h1{font-size:clamp(34px,5vw,56px);font-weight:900;line-height:1.2;margin-bottom:18px;letter-spacing:-1px}
.page-hero .lead{font-size:16px;color:var(--text-muted);line-height:1.8;max-width:680px}

/* breadcrumb */
@media(max-width:520px){.page-hero{padding-top:140px}.page-hero h1{font-size:32px}}