/* Cyberpunk Neon — 横向布局版 · 左侧固定侧边栏 + 右侧主内容 */
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; width: 100%; overflow-x: hidden; }
*, *:before, *:after { box-sizing: border-box; }

:root {
  --neon-cyan: #00f0ff;
  --neon-purple: #b429f9;
  --neon-pink: #ff2d95;
  --neon-green: #00ff88;
  --dark-bg: #05020d;
  --dark-card: #0d0820;
  --dark-card-2: #120a2a;
  --dark-border: rgba(0, 240, 255, 0.25);
  --text-primary: #e0f7ff;
  --text-secondary: #8a9bb8;
  --sidebar-w: 280px;
  --glow-cyan: 0 0 10px rgba(0, 240, 255, 0.6), 0 0 20px rgba(0, 240, 255, 0.3);
  --glow-purple: 0 0 10px rgba(180, 41, 249, 0.6), 0 0 20px rgba(180, 41, 249, 0.3);
  --glow-green: 0 0 10px rgba(0, 255, 136, 0.6), 0 0 20px rgba(0, 255, 136, 0.3);
}

body.z457a3body {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Courier New", monospace;
  color: var(--text-primary);
  background: var(--dark-bg);
  line-height: 1.7;
  word-wrap: break-word;
  position: relative;
}

body.z457a3body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(180, 41, 249, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
    linear-gradient(180deg, #05020d 0%, #0a0518 50%, #05020d 100%);
  z-index: -1;
  pointer-events: none;
}

body.z457a3body::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.12),
    rgba(0, 0, 0, 0.12) 1px,
    transparent 1px,
    transparent 2px
  );
  z-index: 9999;
  pointer-events: none;
  opacity: 0.25;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: all 0.3s ease; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }

.z457a3container { width: 92%; max-width: 1000px; margin: 0 auto; }

/* ========== 左侧固定侧边栏 ========== */
.z457a3sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: linear-gradient(180deg, #08031a 0%, #0d0820 50%, #08031a 100%);
  border-right: 1px solid var(--dark-border);
  z-index: 200;
  overflow-y: auto;
  overflow-x: hidden;
}
.z457a3sidebar::-webkit-scrollbar { width: 4px; }
.z457a3sidebar::-webkit-scrollbar-thumb {
  background: var(--neon-cyan);
  border-radius: 2px;
  opacity: 0.3;
}
.z457a3sidebar-inner {
  padding: 28px 22px;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Logo */
.z457a3logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--dark-border);
}
.z457a3logo-mark {
  width: 38px; height: 38px; border-radius: 2px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: #05020d;
  display: grid; place-items: center;
  font-size: 13px; font-weight: 900;
  flex-shrink: 0;
  box-shadow: var(--glow-cyan);
  position: relative;
}
.z457a3logo-mark::after {
  content: '';
  position: absolute;
  inset: -2px;
  border: 1px solid var(--neon-cyan);
  border-radius: 2px;
  animation: logoPulse 2s ease-in-out infinite;
}
@keyframes logoPulse {
  0%, 100% { opacity: 1; box-shadow: var(--glow-cyan); }
  50% { opacity: 0.5; box-shadow: none; }
}
.z457a3logo-text {
  font-size: 15px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  max-width: 150px;
}

/* 侧边栏导航 */
.z457a3side-nav-title {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 700;
  opacity: 0.7;
}
.z457a3side-nav-list li { margin-bottom: 2px; }
.z457a3side-nav-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text-secondary);
  font-size: 14px;
  border-radius: 4px;
  transition: all 0.25s ease;
  position: relative;
}
.z457a3side-nav-list a::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 2px; height: 0;
  background: linear-gradient(180deg, var(--neon-cyan), var(--neon-purple));
  border-radius: 1px;
  transition: height 0.3s ease;
  box-shadow: var(--glow-cyan);
}
.z457a3side-nav-list a:hover {
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.06);
  text-shadow: var(--glow-cyan);
  padding-left: 16px;
}
.z457a3side-nav-list a:hover::before { height: 60%; }
.z457a3nav-ico {
  font-size: 14px;
  width: 20px;
  text-align: center;
  color: var(--neon-purple);
  text-shadow: var(--glow-purple);
}

/* 侧边栏联系方式 */
.z457a3side-contact {
  padding-top: 20px;
  border-top: 1px solid var(--dark-border);
}
.z457a3side-contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(0, 240, 255, 0.1);
}
.z457a3side-contact-list li:last-of-type { border-bottom: none; }
.z457a3contact-ico {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--dark-border);
  border-radius: 50%;
  color: var(--neon-cyan);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  text-shadow: var(--glow-cyan);
}
.z457a3side-contact-list em {
  display: block;
  font-style: normal;
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 2px;
}
.z457a3side-contact-list strong {
  font-size: 13px;
  color: #fff;
  font-weight: 600;
}
.z457a3side-cta {
  margin-top: 16px !important;
  font-size: 13px !important;
  padding: 10px 16px !important;
}

/* 侧边栏信任标签 */
.z457a3side-trust {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--dark-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.z457a3side-trust span {
  font-size: 12px;
  color: var(--neon-green);
  text-shadow: var(--glow-green);
  opacity: 0.9;
}

/* 移动端菜单按钮 */
.z457a3side-toggle { position: absolute; left: -9999px; opacity: 0; }
.z457a3side-btn {
  display: none;
  position: fixed;
  top: 16px; right: 16px;
  z-index: 210;
  cursor: pointer;
  padding: 10px;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
}
.z457a3side-btn span {
  display: block; width: 22px; height: 2px; margin: 4px 0;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  box-shadow: var(--glow-cyan);
}
.z457a3side-mask {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 190;
}

/* ========== 右侧主内容区 ========== */
.z457a3main {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

/* ========== Buttons ========== */
.z457a3btn {
  display: inline-block; padding: 12px 24px; border-radius: 4px;
  font-size: 14px; font-weight: 700; border: 1px solid transparent;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
  cursor: pointer;
}
.z457a3btn-primary {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: #05020d !important;
  box-shadow: var(--glow-cyan);
}
.z457a3btn-primary:hover {
  box-shadow: var(--glow-cyan), var(--glow-purple), 0 0 30px rgba(0, 240, 255, 0.4);
  transform: translateY(-2px);
}
.z457a3btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: left 0.6s ease;
}
.z457a3btn-primary:hover::before { left: 100%; }
.z457a3btn-ghost {
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan) !important;
  background: transparent;
  text-shadow: var(--glow-cyan);
}
.z457a3btn-ghost:hover {
  background: rgba(0, 240, 255, 0.1);
  box-shadow: var(--glow-cyan), inset 0 0 20px rgba(0, 240, 255, 0.1);
}
.z457a3btn-block { display: block; width: 100%; }
.z457a3btn-lg { padding: 14px 32px; font-size: 15px; }

/* ========== Banner ========== */
.z457a3banner {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}
.z457a3banner-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}
.z457a3banner-text { position: relative; z-index: 2; }
.z457a3banner-brand {
  font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--neon-cyan); font-weight: 700; margin-bottom: 16px;
  text-shadow: var(--glow-cyan);
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--dark-border);
  border-radius: 2px;
  background: rgba(0, 240, 255, 0.05);
}
.z457a3banner-title {
  font-size: clamp(28px, 3.2vw, 42px); line-height: 1.25;
  color: #fff; margin-bottom: 16px;
  font-weight: 800;
}
.z457a3banner-desc {
  color: var(--text-secondary); font-size: 14px; margin-bottom: 24px;
  line-height: 1.8;
}
.z457a3banner-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-bottom: 28px;
}
.z457a3banner-stats {
  display: flex;
  gap: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--dark-border);
}
.z457a3banner-stats div { text-align: left; }
.z457a3banner-stats span {
  display: block;
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  margin-bottom: 4px;
}
.z457a3banner-stats em {
  font-style: normal;
  font-size: 12px;
  color: var(--text-secondary);
}
.z457a3banner-img {
  position: relative;
  display: flex;
  justify-content: center;
}
.z457a3banner-img::before {
  content: '';
  position: absolute;
  inset: 10% 15%;
  background:
    radial-gradient(circle, rgba(0, 240, 255, 0.25) 0%, transparent 60%),
    radial-gradient(circle at 70% 30%, rgba(180, 41, 249, 0.2) 0%, transparent 50%);
  filter: blur(40px);
  z-index: 0;
  animation: floatGlow 5s ease-in-out infinite alternate;
}
@keyframes floatGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(10px, -10px) scale(1.1); }
}
.z457a3banner-img img {
  position: relative;
  z-index: 1;
  max-height: 480px;
  width: auto;
  border-radius: 8px;
  mix-blend-mode: luminosity;
  opacity: 0.85;
  filter: contrast(1.15);
  border: 1px solid var(--dark-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* ========== Ad Section ========== */
.z457a3ad {
  padding: 14px 0;
  text-align: center;
  background: rgba(13, 8, 32, 0.6);
  border-top: 1px solid var(--dark-border);
  border-bottom: 1px solid var(--dark-border);
}

/* ========== Section Base ========== */
.z457a3section { padding: 70px 0; position: relative; }
.z457a3section-head {
  text-align: left;
  max-width: 650px;
  margin: 0 0 40px;
  position: relative;
}
.z457a3section-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--neon-purple);
  font-weight: 700;
  margin-bottom: 10px;
  text-shadow: var(--glow-purple);
  padding: 3px 10px;
  border: 1px solid rgba(180, 41, 249, 0.3);
  border-radius: 2px;
  background: rgba(180, 41, 249, 0.06);
}
.z457a3section-title {
  font-size: clamp(22px, 2.6vw, 30px);
  color: #fff;
  margin-bottom: 8px;
  font-weight: 800;
  position: relative;
  display: inline-block;
}
.z457a3section-title::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0;
  width: 40px; height: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  box-shadow: var(--glow-cyan);
}
.z457a3section-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 16px;
  line-height: 1.7;
}

/* ========== 3. Service 核心服务 ========== */
.z457a3service {
  background: linear-gradient(180deg, transparent 0%, rgba(13, 8, 32, 0.4) 50%, transparent 100%);
}
.z457a3service-featured { margin-bottom: 28px; }
.z457a3featured-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  padding: 28px 28px;
  position: relative;
  overflow: hidden;
}
.z457a3featured-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--neon-cyan), var(--neon-purple));
  box-shadow: var(--glow-cyan);
}
.z457a3featured-icon {
  font-size: 40px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  filter: drop-shadow(var(--glow-cyan));
}
.z457a3featured-content h3 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 8px;
  font-weight: 700;
}
.z457a3featured-content p {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 10px;
}
.z457a3featured-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.z457a3featured-tags span {
  font-size: 11px;
  padding: 3px 10px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--dark-border);
  border-radius: 20px;
  color: var(--neon-cyan);
}

.z457a3service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.z457a3service-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  padding: 22px 18px;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}
.z457a3service-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--neon-purple), var(--neon-cyan));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease;
}
.z457a3service-card:hover {
  transform: translateY(-4px);
  border-color: var(--neon-purple);
  box-shadow: 0 10px 30px rgba(180, 41, 249, 0.15);
}
.z457a3service-card:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}
.z457a3service-icon {
  font-size: 24px;
  color: var(--neon-purple);
  margin-bottom: 12px;
  text-shadow: var(--glow-purple);
  line-height: 1;
}
.z457a3service-card h3 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 8px;
  font-weight: 700;
}
.z457a3service-card p {
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.7;
  margin-bottom: 12px;
}
.z457a3service-link {
  color: var(--neon-cyan);
  font-size: 12px;
  font-weight: 600;
  text-shadow: var(--glow-cyan);
  display: inline-block;
}
.z457a3service-link:hover { transform: translateX(4px); color: #fff; }

/* ========== 4. Advantage 服务优势 ========== */
.z457a3advantage { background: transparent; }
.z457a3advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.z457a3advantage-item {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
  transition: all 0.3s ease;
}
.z457a3advantage-item:hover {
  transform: translateY(-3px);
  border-color: var(--neon-green);
  box-shadow: 0 6px 20px rgba(0, 255, 136, 0.12);
}
.z457a3advantage-icon {
  flex-shrink: 0;
  font-size: 24px;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 50%;
}
.z457a3advantage-item h3 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 4px;
  font-weight: 700;
}
.z457a3advantage-item p {
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.7;
}

/* ========== 5. Process 横向步骤条 ========== */
.z457a3process {
  background: linear-gradient(180deg, transparent 0%, rgba(13, 8, 32, 0.4) 50%, transparent 100%);
}
.z457a3steps-h {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0;
  position: relative;
}
.z457a3step-h {
  flex: 1;
  text-align: center;
  padding: 0 8px;
  position: relative;
  z-index: 2;
}
.z457a3step-num {
  width: 48px; height: 48px;
  margin: 0 auto 14px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: #05020d;
  font-size: 14px;
  font-weight: 800;
  border-radius: 50%;
  box-shadow: var(--glow-cyan), 0 0 0 4px rgba(0, 240, 255, 0.12);
  position: relative;
}
.z457a3step-h h3 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 6px;
  font-weight: 700;
}
.z457a3step-h p {
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.7;
}
.z457a3step-line {
  flex: 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  align-self: 24px;
  margin-top: 23px;
  width: 100%;
  position: relative;
  box-shadow: var(--glow-cyan);
  opacity: 0.4;
}

/* ========== 6. Scope 服务范围 ========== */
.z457a3scope { background: transparent; }
.z457a3scope-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.z457a3scope-item {
  display: flex;
  gap: 12px;
  padding: 18px;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
  transition: all 0.3s ease;
}
.z457a3scope-item:hover {
  border-color: var(--neon-cyan);
  transform: translateX(4px);
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.1);
}
.z457a3scope-ico {
  color: var(--neon-cyan);
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  text-shadow: var(--glow-cyan);
}
.z457a3scope-item h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 4px;
  font-weight: 700;
}
.z457a3scope-item p {
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.6;
}

/* ========== 7. CTA 联系横幅 ========== */
.z457a3cta {
  padding: 50px 0;
  background: linear-gradient(135deg, rgba(180, 41, 249, 0.08) 0%, rgba(0, 240, 255, 0.08) 100%);
}
.z457a3cta-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  padding: 32px 36px;
  position: relative;
  overflow: hidden;
}
.z457a3cta-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-purple), var(--neon-cyan), var(--neon-purple));
  background-size: 200% 100%;
  animation: borderFlow 3s linear infinite;
}
@keyframes borderFlow {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}
.z457a3cta-left h2 {
  font-size: 24px;
  color: #fff;
  margin-top: 8px;
  margin-bottom: 6px;
  font-weight: 800;
}
.z457a3cta-left p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 14px;
}
.z457a3cta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.z457a3cta-tags span {
  font-size: 12px;
  color: var(--neon-green);
  padding: 3px 10px;
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 20px;
  background: rgba(0, 255, 136, 0.08);
  text-shadow: var(--glow-green);
}
.z457a3cta-right {
  text-align: center;
  min-width: 220px;
}
.z457a3cta-qq {
  margin-bottom: 14px;
  padding: 14px 20px;
  background: rgba(0, 240, 255, 0.05);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
}
.z457a3cta-label {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 3px;
}
.z457a3cta-qq strong {
  font-size: 16px;
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
}
.z457a3cta-note {
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-secondary);
}

/* ========== 8. Contact Detail ========== */
.z457a3contact-detail {
  padding-top: 0;
  background: transparent;
}
.z457a3contact-wrap {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 16px;
}
.z457a3contact-panel, .z457a3contact-aside {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.z457a3contact-panel::before,
.z457a3contact-aside::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  background-size: 200% 100%;
  animation: borderFlow 3s linear infinite;
}
.z457a3contact-panel h3, .z457a3contact-aside h3 {
  color: var(--neon-cyan);
  margin-bottom: 16px;
  font-size: 16px;
  text-shadow: var(--glow-cyan);
  position: relative; z-index: 1;
}
.z457a3contact-list li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(0, 240, 255, 0.15);
  font-size: 13px;
  position: relative; z-index: 1;
}
.z457a3contact-list li:last-child { border-bottom: none; }
.z457a3contact-list span { color: var(--text-secondary); }
.z457a3contact-list a, .z457a3contact-list strong {
  color: #fff;
  font-weight: 600;
  font-size: 13px;
}
.z457a3contact-list a:hover {
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
}
.z457a3contact-aside ol {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
  position: relative; z-index: 1;
  counter-reset: item;
}
.z457a3contact-aside li {
  color: var(--text-secondary);
  font-size: 12px;
  margin-bottom: 8px;
  padding-left: 24px;
  position: relative;
  line-height: 1.7;
  counter-increment: item;
}
.z457a3contact-aside li::before {
  content: counter(item, decimal-leading-zero);
  position: absolute;
  left: 0; top: 0;
  color: var(--neon-purple);
  font-weight: 700;
  font-size: 11px;
  text-shadow: var(--glow-purple);
}

/* ========== 9. FAQ ========== */
.z457a3faq {
  background: linear-gradient(180deg, transparent 0%, rgba(13, 8, 32, 0.4) 50%, transparent 100%);
}
.z457a3faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.z457a3faq-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.z457a3faq-col details {
  border: 1px solid var(--dark-border);
  background: var(--dark-card);
  border-radius: 4px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.z457a3faq-col details[open] {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.1);
}
.z457a3faq-col summary {
  cursor: pointer;
  padding: 14px 18px;
  font-weight: 700;
  color: #fff;
  list-style: none;
  position: relative;
  transition: all 0.3s ease;
  font-size: 13px;
  padding-right: 40px;
}
.z457a3faq-col summary::after {
  content: '+';
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--neon-cyan);
  transition: transform 0.3s ease;
  text-shadow: var(--glow-cyan);
}
.z457a3faq-col details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}
.z457a3faq-col summary::-webkit-details-marker { display: none; }
.z457a3faq-col summary:hover { color: var(--neon-cyan); }
.z457a3faq-col details div {
  padding: 0 18px 16px;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.8;
  border-top: 1px solid var(--dark-border);
  padding-top: 12px;
}

/* ========== 10. About 关于我们 ========== */
.z457a3about { background: transparent; }
.z457a3about-wrap {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
  align-items: start;
}
.z457a3about-text h3 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 12px;
  font-weight: 700;
}
.z457a3about-text p {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 10px;
}
.z457a3about-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 18px;
}
.z457a3about-feature {
  text-align: center;
  padding: 14px 6px;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
  transition: all 0.3s ease;
}
.z457a3about-feature:hover {
  border-color: var(--neon-purple);
  transform: translateY(-2px);
}
.z457a3about-feature strong {
  display: block;
  font-size: 16px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 3px;
}
.z457a3about-feature span {
  font-size: 11px;
  color: var(--text-secondary);
}
.z457a3about-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.z457a3about-cards article {
  background: var(--dark-card);
  padding: 20px;
  border: 1px solid var(--dark-border);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}
.z457a3about-cards article::before {
  content: '"';
  position: absolute;
  top: 4px; right: 12px;
  font-size: 48px;
  color: var(--neon-purple);
  opacity: 0.15;
  line-height: 1;
  font-family: Georgia, serif;
}
.z457a3about-cards article:hover {
  border-color: var(--neon-cyan);
  box-shadow: 0 6px 20px rgba(0, 240, 255, 0.12);
  transform: translateX(4px);
}
.z457a3about-cards h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 6px;
  font-weight: 700;
}
.z457a3about-cards p {
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.7;
}

/* ========== 11. Friend Link ========== */
.z457a3flink {
  background: transparent;
  padding-bottom: 50px;
}
.z457a3flink-list {
  display: flex; flex-wrap: wrap; gap: 10px 16px;
}
.z457a3flink-list a {
  color: var(--neon-cyan);
  font-size: 13px;
  padding: 5px 12px;
  border: 1px solid var(--dark-border);
  border-radius: 2px;
  transition: all 0.3s ease;
  background: rgba(0, 240, 255, 0.03);
}
.z457a3flink-list a:hover {
  color: #fff;
  border-color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.1);
  box-shadow: var(--glow-cyan);
  text-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}

/* ========== Footer ========== */
.z457a3footer {
  margin-left: var(--sidebar-w);
  background: #03010a;
  padding: 30px 0;
  text-align: center;
  border-top: 1px solid var(--dark-border);
  position: relative;
}
.z457a3footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-purple), var(--neon-cyan), transparent);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}
.z457a3footer-brand {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.z457a3footer-nav {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 16px;
  margin-bottom: 14px;
  color: var(--text-secondary);
  font-size: 12px;
}
.z457a3footer-nav a:hover {
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
}
.z457a3footer-power {
  color: #5a6a82;
  font-size: 11px;
  line-height: 1.8;
}
.z457a3footer-power a { color: var(--neon-cyan); opacity: 0.8; }
.z457a3footer-power a:hover { opacity: 1; }

/* ========== Responsive ========== */
@media (max-width: 1200px) {
  :root { --sidebar-w: 240px; }
  .z457a3logo-text { max-width: 120px; font-size: 14px; }
  .z457a3service-grid { grid-template-columns: repeat(2, 1fr); }
  .z457a3scope-list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .z457a3sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    width: 260px;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.5);
  }
  .z457a3side-btn { display: block; }
  .z457a3side-toggle:checked ~ .z457a3sidebar { transform: translateX(0); }
  .z457a3side-toggle:checked ~ .z457a3side-mask { display: block; }
  .z457a3main { margin-left: 0; }
  .z457a3footer { margin-left: 0; }
  .z457a3banner { padding: 70px 0 40px; }
  .z457a3banner-inner { grid-template-columns: 1fr; gap: 30px; text-align: center; }
  .z457a3banner-stats { justify-content: center; gap: 32px; }
  .z457a3banner-actions { justify-content: center; }
  .z457a3banner-brand { margin: 0 auto 16px; }
  .z457a3section-head { text-align: center; }
  .z457a3section-title::after { left: 50%; transform: translateX(-50%); }
  .z457a3featured-card { grid-template-columns: 1fr; text-align: center; gap: 16px; }
  .z457a3featured-tags { justify-content: center; }
  .z457a3advantage-grid { grid-template-columns: 1fr 1fr; }
  .z457a3steps-h {
    flex-wrap: wrap;
    gap: 16px;
  }
  .z457a3step-h { flex: 0 0 calc(50% - 8px); }
  .z457a3step-line { display: none; }
  .z457a3faq-grid { grid-template-columns: 1fr; }
  .z457a3about-wrap { grid-template-columns: 1fr; }
  .z457a3contact-wrap { grid-template-columns: 1fr; }
  .z457a3cta-box { grid-template-columns: 1fr; gap: 20px; text-align: center; }
  .z457a3cta-tags { justify-content: center; }
}
@media (max-width: 560px) {
  .z457a3section { padding: 48px 0; }
  .z457a3service-grid { grid-template-columns: 1fr; }
  .z457a3scope-list { grid-template-columns: 1fr; }
  .z457a3advantage-grid { grid-template-columns: 1fr; }
  .z457a3step-h { flex: 0 0 100%; }
  .z457a3about-features { grid-template-columns: repeat(2, 1fr); }
  .z457a3banner-stats { flex-wrap: wrap; gap: 16px 24px; }
}