/* =============================================================
   AI·生盾 官网 — 独特设计
   主题：暗夜蓝紫 + 青色光带 + 流体光带 + 玻璃拟态 + 故障风
   风格：超越市面常见模板的视觉表达
   ============================================================= */

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Serif SC', 'PingFang SC', 'Microsoft YaHei', serif;
  background: #05071a;
  color: #e6e9ff;
  overflow-x: hidden;
  line-height: 1.6;
  position: relative;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: none; color: inherit; cursor: pointer; }
ul { list-style: none; }
input { font: inherit; }

/* ---------- 颜色变量 ---------- */
:root {
  --bg: #05071a;
  --bg-2: #0a0e2a;
  --bg-3: #0f1438;
  --cyan: #00f6ff;
  --purple: #7c3aed;
  --blue: #2563eb;
  --pink: #ec4899;
  --text: #e6e9ff;
  --text-dim: #8b93b8;
  --text-soft: #5a6385;
  --line: rgba(124, 58, 237, 0.18);
  --glass: rgba(15, 20, 56, 0.4);
  --glass-2: rgba(0, 246, 255, 0.05);
  --h: 100vh;
}

/* ---------- 背景层 ---------- */
.bg-layer {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(124, 58, 237, 0.25), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(0, 246, 255, 0.18), transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(37, 99, 235, 0.1), transparent 70%),
    linear-gradient(180deg, #05071a 0%, #0a0e2a 50%, #05071a 100%);
}
#bgCanvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0.7;
}

/* 流体光带 */
.fluid-band {
  position: absolute;
  width: 140%; height: 200px;
  left: -20%;
  filter: blur(60px);
  opacity: 0.5;
  mix-blend-mode: screen;
  pointer-events: none;
  animation: bandFlow 18s ease-in-out infinite;
}
.band-1 {
  top: 10%;
  background: linear-gradient(90deg, transparent, #7c3aed, #00f6ff, transparent);
  transform: rotate(-8deg);
}
.band-2 {
  top: 50%;
  background: linear-gradient(90deg, transparent, #00f6ff, #ec4899, transparent);
  animation-delay: -6s;
  animation-duration: 22s;
  transform: rotate(5deg);
  height: 160px;
  opacity: 0.35;
}
.band-3 {
  top: 85%;
  background: linear-gradient(90deg, transparent, #2563eb, #7c3aed, transparent);
  animation-delay: -3s;
  animation-duration: 25s;
  transform: rotate(-3deg);
  height: 140px;
  opacity: 0.4;
}
@keyframes bandFlow {
  0%, 100% { transform: translateX(0) rotate(-8deg) scaleY(1); }
  33% { transform: translateX(5%) rotate(-5deg) scaleY(1.2); }
  66% { transform: translateX(-5%) rotate(-10deg) scaleY(0.9); }
}

/* 网格覆盖 */
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0, 246, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 246, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

/* 噪点 */
.noise-overlay {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='200' height='200' filter='url(%23n)' opacity='0.5'/></svg>");
  opacity: 0.04;
  pointer-events: none;
}

/* 鼠标追踪射线 */
.ray-svg {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 5;
  opacity: 0.6;
  mix-blend-mode: screen;
}

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(5, 7, 26, 0.6);
  border-bottom: 1px solid rgba(124, 58, 237, 0.15);
  transition: all 0.4s ease;
}
.nav.scrolled {
  background: rgba(5, 7, 26, 0.85);
  border-bottom-color: rgba(0, 246, 255, 0.25);
}
.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 18px 40px;
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-progress {
  position: absolute; bottom: 0; left: 0; height: 1px;
  background: linear-gradient(90deg, transparent, #00f6ff, #7c3aed, transparent);
  width: 0%;
  transition: width 0.1s;
  box-shadow: 0 0 10px #00f6ff;
}

/* Logo */
.logo {
  display: flex; align-items: center; gap: 12px;
  position: relative;
}
.logo-svg {
  width: 38px; height: 38px;
  filter: drop-shadow(0 0 8px rgba(0, 246, 255, 0.5));
  animation: logoSpin 30s linear infinite;
}
@keyframes logoSpin {
  to { transform: rotate(360deg); }
}
.logo-text {
  display: flex; flex-direction: column; line-height: 1.1;
}
.logo-name {
  font-family: 'Orbitron', 'Noto Serif SC', sans-serif;
  font-size: 18px; font-weight: 700;
  background: linear-gradient(135deg, #00f6ff, #7c3aed);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 1px;
}
.logo-dot {
  color: #00f6ff;
  -webkit-text-fill-color: #00f6ff;
  margin: 0 1px;
}
.logo-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px; color: var(--text-soft);
  letter-spacing: 2px;
}

/* 链接 */
.nav-links {
  display: flex; gap: 36px;
  margin-left: auto;
}
.nav-links a {
  position: relative;
  font-size: 14px;
  color: var(--text);
  padding: 6px 0;
  transition: color 0.3s;
  font-weight: 500;
}
.nav-links a::before {
  content: attr(data-text);
  position: absolute;
  top: -20px; left: 0;
  font-size: 9px;
  color: var(--cyan);
  opacity: 0;
  transition: opacity 0.3s;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: linear-gradient(90deg, #00f6ff, #7c3aed);
  transition: width 0.4s;
  box-shadow: 0 0 6px #00f6ff;
}
.nav-links a:hover { color: var(--cyan); }
.nav-links a:hover::before { opacity: 1; }
.nav-links a:hover::after { width: 100%; }

.nav-actions {
  display: flex; align-items: center; gap: 16px;
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #00ff88;
  box-shadow: 0 0 12px #00ff88;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.status-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: linear-gradient(135deg, #00f6ff, #7c3aed);
  color: #fff;
  border-radius: 2px;
  font-size: 13px;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  clip-path: polygon(8% 0, 100% 0, 92% 100%, 0 100%);
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 246, 255, 0.4);
}
.btn-primary:hover::before {
  transform: translateX(100%);
}
.btn-primary.big {
  padding: 16px 36px;
  font-size: 14px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  border: 1px solid rgba(0, 246, 255, 0.3);
  background: rgba(0, 246, 255, 0.05);
  color: var(--cyan);
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
  transition: all 0.3s;
  position: relative;
}
.btn-ghost:hover {
  background: rgba(0, 246, 255, 0.15);
  border-color: #00f6ff;
  box-shadow: 0 0 20px rgba(0, 246, 255, 0.3) inset;
}
.play-icon {
  width: 24px; height: 24px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}
.play-icon::before {
  content: '';
  position: absolute;
  top: 50%; left: 55%;
  transform: translate(-50%, -50%);
  border: 4px solid transparent;
  border-left-color: var(--cyan);
}

.nav-burger { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 120px 40px 80px;
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 60px;
}
.hero-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.deco-ring {
  position: absolute;
  border: 1px solid rgba(0, 246, 255, 0.15);
  border-radius: 50%;
}
.ring-1 { width: 400px; height: 400px; top: -100px; left: -200px; animation: ringSpin 60s linear infinite; }
.ring-2 { width: 300px; height: 300px; bottom: -50px; right: -100px; animation: ringSpin 40s linear infinite reverse; border-color: rgba(124, 58, 237, 0.2); }
.ring-3 { width: 200px; height: 200px; top: 30%; right: 30%; border-color: rgba(0, 246, 255, 0.1); animation: ringSpin 30s linear infinite; }
@keyframes ringSpin {
  to { transform: rotate(360deg); }
}
.deco-ring::before {
  content: '';
  position: absolute;
  width: 8px; height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  top: -4px; left: 50%;
  box-shadow: 0 0 10px var(--cyan);
}
.deco-cross {
  position: absolute;
  top: 50%; left: 50%;
  width: 1px; height: 100vh;
  background: linear-gradient(180deg, transparent, rgba(0, 246, 255, 0.2), transparent);
  transform: translate(-50%, -50%);
}
.deco-tick {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-soft);
  letter-spacing: 1px;
}
.deco-tick.r1 { top: 15%; right: 4%; writing-mode: vertical-rl; }
.deco-tick.r2 { bottom: 15%; left: 4%; writing-mode: vertical-rl; }
.deco-label {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-soft);
  letter-spacing: 2px;
  opacity: 0.7;
}
.deco-label:not(.lb) { top: 15%; left: 4%; }
.deco-label.lb { bottom: 12%; right: 4%; }

.hero-content {
  position: relative;
  z-index: 2;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  padding: 8px 16px;
  border: 1px solid rgba(124, 58, 237, 0.4);
  background: rgba(124, 58, 237, 0.08);
  position: relative;
}
.hero-tag::before, .hero-tag::after {
  content: '';
  position: absolute;
  width: 6px; height: 6px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}
.hero-tag::before { top: -3px; left: -3px; }
.hero-tag::after { bottom: -3px; right: -3px; }
.tag-line {
  width: 30px; height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 6px var(--cyan);
}
.tag-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 2px;
  font-weight: 600;
}

.hero-title {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(32px, 4.5vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 28px;
  color: #fff;
  letter-spacing: 1px;
}
.title-flame {
  position: relative;
  display: inline-block;
  background: linear-gradient(180deg, #fff200 0%, #ff6a00 35%, #ff2a2a 70%, #8b0000 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-right: 8px;
  font-weight: 800;
  text-shadow:
    0 0 8px rgba(255, 106, 0, 0.6),
    0 0 18px rgba(255, 42, 42, 0.45),
    0 0 32px rgba(255, 80, 0, 0.35);
  animation: flameFlicker 2.4s ease-in-out infinite;
}
.title-flame::before, .title-flame::after {
  content: attr(data-text);
  position: absolute;
  top: 0; left: 0;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  pointer-events: none;
}
.title-flame::before {
  background: linear-gradient(180deg, #fff 0%, #ffea00 40%, #ff8a00 100%);
  filter: blur(4px);
  opacity: 0.55;
  animation: flameRise 1.6s ease-in-out infinite;
}
.title-flame::after {
  background: linear-gradient(180deg, #ffe600 0%, #ff2a00 100%);
  filter: blur(10px);
  opacity: 0.55;
  animation: flameRise 2.1s ease-in-out infinite reverse;
}
@keyframes flameFlicker {
  0%, 100% { transform: translateY(0) scaleY(1); }
  25% { transform: translateY(-1px) scaleY(1.02); }
  50% { transform: translateY(0) scaleY(0.99); }
  75% { transform: translateY(-2px) scaleY(1.01); }
}
@keyframes flameRise {
  0%, 100% { transform: translateY(0) scaleY(1); opacity: 0.55; }
  50% { transform: translateY(-3px) scaleY(1.05); opacity: 0.85; }
}
.title-main {
  display: block;
  font-weight: 600;
}
.title-main em {
  font-style: normal;
  color: var(--cyan);
  position: relative;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  letter-spacing: 2px;
}
.title-main em::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, #00f6ff, transparent);
  box-shadow: 0 0 8px var(--cyan);
}

.hero-desc {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 540px;
  margin-bottom: 40px;
  line-height: 1.8;
  border-left: 2px solid var(--cyan);
  padding-left: 16px;
}

.hero-cta {
  display: flex;
  gap: 20px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: 30px;
  position: relative;
}
.hero-stats::before {
  content: '';
  position: absolute;
  top: -1px; left: 0;
  width: 60px; height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}
.stat {
  position: relative;
}
.stat-num {
  font-family: 'Orbitron', sans-serif;
  font-size: 36px;
  font-weight: 900;
  color: var(--cyan);
  line-height: 1;
  text-shadow: 0 0 16px rgba(0, 246, 255, 0.5);
  display: inline-block;
}
.stat-suffix {
  font-family: 'Orbitron', sans-serif;
  font-size: 18px;
  color: var(--cyan);
  margin-left: 2px;
  opacity: 0.7;
}
.stat-label {
  font-size: 12px;
  color: var(--text-soft);
  margin-top: 8px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
}

/* 右侧盾牌舞台 */
.hero-stage {
  position: relative;
  height: 580px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.stage-frame {
  position: relative;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(0, 246, 255, 0.15);
  background: rgba(15, 20, 56, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  overflow: hidden;
}
.frame-corner {
  position: absolute;
  width: 30px; height: 30px;
  border: 2px solid var(--cyan);
}
.frame-corner.tl { top: 0; left: 0; border-right: none; border-bottom: none; }
.frame-corner.tr { top: 0; right: 0; border-left: none; border-bottom: none; }
.frame-corner.bl { bottom: 0; left: 0; border-right: none; border-top: none; }
.frame-corner.br { bottom: 0; right: 0; border-left: none; border-top: none; }
.frame-label {
  position: absolute;
  top: 20px; left: 0; right: 0;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--cyan);
  letter-spacing: 4px;
  opacity: 0.6;
  animation: marquee 15s linear infinite;
  white-space: nowrap;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.shield-3d {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 360px; height: 360px;
  perspective: 1000px;
}
.shield-core {
  position: relative;
  width: 100%; height: 100%;
  animation: shieldFloat 6s ease-in-out infinite;
}
@keyframes shieldFloat {
  0%, 100% { transform: translateY(0) rotateY(0); }
  50% { transform: translateY(-20px) rotateY(8deg); }
}
.shield-svg {
  width: 100%; height: 100%;
  filter: drop-shadow(0 0 30px rgba(0, 246, 255, 0.5));
}
.shield-orb {
  position: absolute;
  top: 50%; left: 50%;
  width: 100px; height: 100px;
  background: radial-gradient(circle, #00f6ff, transparent 70%);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  filter: blur(10px);
  animation: orbPulse 3s ease-in-out infinite;
}
@keyframes orbPulse {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
}
.shield-ring {
  position: absolute;
  top: 50%; left: 50%;
  border: 1px solid rgba(0, 246, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.shield-ring.r1 { width: 280px; height: 280px; animation: ringRotate 10s linear infinite; }
.shield-ring.r2 { width: 340px; height: 340px; animation: ringRotate 16s linear infinite reverse; border-color: rgba(124, 58, 237, 0.3); }
.shield-ring.r3 { width: 400px; height: 400px; animation: ringRotate 22s linear infinite; border-color: rgba(0, 246, 255, 0.15); }
@keyframes ringRotate {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}
.shield-ring.r1::before { content: ''; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; background: var(--cyan); border-radius: 50%; box-shadow: 0 0 10px var(--cyan); }
.shield-ring.r2::before { content: ''; position: absolute; bottom: -4px; right: 20%; width: 8px; height: 8px; background: var(--purple); border-radius: 50%; box-shadow: 0 0 10px var(--purple); }

.shield-text {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  font-family: 'Orbitron', sans-serif;
  z-index: 2;
}
.shield-text .st-line {
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 3px;
  text-shadow: 0 0 8px var(--cyan);
  margin: 4px 0;
  font-weight: 700;
}
.shield-text .st-line:nth-child(2) { font-size: 9px; opacity: 0.6; }
.shield-text .st-line:nth-child(3) { font-size: 14px; color: #fff; }

.hex-grid {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 20px;
  padding: 40px;
  opacity: 0.15;
  pointer-events: none;
}
.hex {
  width: 100%;
  aspect-ratio: 1.15;
  background: linear-gradient(135deg, rgba(0, 246, 255, 0.1), transparent);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  border: 1px solid rgba(0, 246, 255, 0.2);
}
.scan-line {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 10px var(--cyan);
  animation: scan 4s linear infinite;
  pointer-events: none;
}
@keyframes scan {
  0% { top: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.scroll-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-soft);
  letter-spacing: 3px;
}
.scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(180deg, var(--cyan), transparent);
  position: relative;
  overflow: hidden;
}
.scroll-line::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 20px;
  background: var(--cyan);
  animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown {
  0% { top: -20px; }
  100% { top: 50px; }
}

/* ---------- 通用 Section ---------- */
.section {
  position: relative;
  padding: 120px 40px;
  max-width: 1400px;
  margin: 0 auto;
}
.section-head {
  text-align: center;
  margin-bottom: 80px;
  position: relative;
}
.section-no {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 3px;
  margin-bottom: 16px;
  padding: 6px 14px;
  border: 1px solid rgba(0, 246, 255, 0.3);
  background: rgba(0, 246, 255, 0.05);
  position: relative;
}
.section-no::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px;
  width: 6px; height: 6px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}
.section-title {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.section-title span {
  display: block;
  background: linear-gradient(135deg, #fff 0%, #00f6ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-title em {
  display: block;
  font-style: normal;
  font-family: 'Orbitron', sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-soft);
  letter-spacing: 6px;
  margin-top: 8px;
}
.section-sub {
  color: var(--text-dim);
  font-size: 15px;
  margin-top: 16px;
}

/* ---------- 自研系统 ---------- */
.sys-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}
.sys-grid::before {
  content: '';
  position: absolute;
  top: -30px; left: 50%;
  transform: translateX(-50%);
  width: 80%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.4;
}
.sys-card {
  position: relative;
  padding: 36px 28px 70px;
  background: linear-gradient(135deg, rgba(15, 20, 56, 0.6), rgba(15, 20, 56, 0.3));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(124, 58, 237, 0.2);
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
  min-height: 380px;
  display: flex;
  flex-direction: column;
}
.sys-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s;
}
.sys-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(0, 246, 255, 0.15), transparent 50%);
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.sys-card:hover {
  transform: translateY(-8px) rotate(-1deg);
  border-color: rgba(0, 246, 255, 0.4);
  box-shadow: 0 20px 60px rgba(0, 246, 255, 0.15);
}
.sys-card:hover::before { transform: scaleX(1); }
.sys-card:hover::after { opacity: 1; }
.sys-card:nth-child(2) { transform: translateY(20px); }
.sys-card:nth-child(2):hover { transform: translateY(12px) rotate(1deg); }
.sys-card:nth-child(5) { transform: translateY(20px); }
.sys-card:nth-child(5):hover { transform: translateY(12px) rotate(1deg); }

.card-no {
  position: absolute;
  top: 20px; right: 20px;
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  color: var(--text-soft);
  letter-spacing: 2px;
  font-weight: 700;
}
.card-icon {
  width: 52px; height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--cyan);
  position: relative;
}
.card-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 246, 255, 0.15);
  border: 1px solid rgba(0, 246, 255, 0.4);
  clip-path: polygon(50% 0, 100% 30%, 100% 70%, 50% 100%, 0 70%, 0 30%);
}
.card-icon svg {
  width: 30px; height: 30px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 0 6px rgba(0, 246, 255, 0.5));
}
.sys-card h3 {
  font-size: 22px;
  color: #fff;
  margin-bottom: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  position: relative;
}
.sys-card p {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 20px;
  flex: 1;
  line-height: 1.7;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.tag-list li {
  font-size: 11px;
  padding: 4px 10px;
  background: rgba(0, 246, 255, 0.08);
  color: var(--cyan);
  border: 1px solid rgba(0, 246, 255, 0.2);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
}
.card-arrow {
  position: absolute;
  bottom: 20px; right: 20px;
  width: 36px; height: 36px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.4s;
  clip-path: polygon(20% 0, 100% 0, 80% 100%, 0 100%);
}
.sys-card:hover .card-arrow {
  background: var(--cyan);
  color: #05071a;
  box-shadow: 0 0 16px var(--cyan);
}

/* 卡片徽章（NEW·旗舰） */
.card-badge {
  position: absolute;
  top: 16px; left: 0;
  padding: 4px 14px;
  background: linear-gradient(135deg, #00f6ff, #7c3aed);
  color: #05071a;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
  z-index: 3;
}

/* 卡片状态标签 */
.card-status {
  position: absolute;
  bottom: 16px; left: 28px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--cyan);
  opacity: 0.7;
  letter-spacing: 1px;
  padding: 4px 10px;
  border: 1px solid rgba(0, 246, 255, 0.25);
  background: rgba(0, 246, 255, 0.05);
}

/* 旗舰卡片特殊样式 */
.sys-card.featured {
  border-color: rgba(0, 246, 255, 0.4);
}
.sys-card.featured::before {
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--cyan));
}

/* ---------- 体系架构（斜切交错） ---------- */
.arch-wrap {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  perspective: 1200px;
}
.arch-layer {
  position: relative;
  padding: 40px 60px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(15, 20, 56, 0.8), rgba(15, 20, 56, 0.4));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-left: 4px solid var(--cyan);
  display: grid;
  grid-template-columns: 80px 1fr 1.5fr;
  gap: 30px;
  align-items: center;
  transition: all 0.5s;
  clip-path: polygon(0 0, 100% 0, 98% 100%, 0 100%);
  transform: translateX(var(--tx, 0));
}
.arch-layer:nth-child(odd) { --tx: -30px; border-left-color: var(--cyan); }
.arch-layer:nth-child(even) { --tx: 30px; border-left-color: var(--purple); }
.arch-layer:hover {
  transform: translateX(0) scale(1.02);
  border-color: var(--cyan);
  box-shadow: 0 10px 40px rgba(0, 246, 255, 0.2);
}
.layer-no {
  font-family: 'Orbitron', sans-serif;
  font-size: 48px;
  font-weight: 900;
  background: linear-gradient(135deg, #00f6ff, #7c3aed);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  opacity: 0.8;
}
.layer-name {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
  margin-bottom: 6px;
  position: relative;
  padding-bottom: 10px;
  grid-column: 2 / 3;
  grid-row: 1;
}
.layer-name::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 40px; height: 2px;
  background: var(--cyan);
}
.layer-info {
  color: var(--text-dim);
  font-size: 14px;
  grid-column: 3 / 4;
  grid-row: 1;
  line-height: 1.7;
}
.layer-tech {
  grid-column: 2 / 4;
  grid-row: 2;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 1px;
  margin-top: 8px;
  opacity: 0.7;
}

.arch-axis {
  position: absolute;
  right: -40px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
  opacity: 0.4;
}
.axis-tick {
  position: absolute;
  right: -6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-soft);
  transform: translateY(-50%);
}

/* ---------- 全流程技术服务（时间轴+水晶球） ---------- */
.flow {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 0;
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
}
.flow-step {
  flex: 1;
  position: relative;
  z-index: 2;
}
.flow-dot {
  width: 24px; height: 24px;
  background: radial-gradient(circle, #00f6ff, rgba(0, 246, 255, 0.2));
  border-radius: 50%;
  margin: 0 auto 24px;
  box-shadow: 0 0 16px var(--cyan);
  position: relative;
  animation: pulseDot 2s infinite;
}
.flow-dot::before {
  content: '';
  position: absolute;
  inset: -8px;
  border: 1px solid rgba(0, 246, 255, 0.3);
  border-radius: 50%;
  animation: ringOut 2s infinite;
}
@keyframes pulseDot {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}
@keyframes ringOut {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}
.flow-card {
  padding: 30px 20px;
  background: linear-gradient(180deg, rgba(15, 20, 56, 0.7), rgba(15, 20, 56, 0.3));
  border: 1px solid rgba(124, 58, 237, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  text-align: center;
  transition: all 0.4s;
  position: relative;
}
.flow-card::before {
  content: '';
  position: absolute;
  top: -1px; left: 50%;
  transform: translateX(-50%);
  width: 30%; height: 2px;
  background: var(--cyan);
  transition: width 0.4s;
}
.flow-card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan);
  box-shadow: 0 10px 30px rgba(0, 246, 255, 0.2);
}
.flow-card:hover::before { width: 80%; }
.flow-icon {
  font-family: 'Orbitron', sans-serif;
  font-size: 36px;
  font-weight: 900;
  background: linear-gradient(135deg, #00f6ff, #7c3aed);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 12px;
  line-height: 1;
}
.flow-card h4 {
  font-size: 18px;
  color: #fff;
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: 1px;
}
.flow-card p {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.6;
}
.flow-line {
  flex: 0.3;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--purple), transparent);
  align-self: flex-start;
  margin-top: 12px;
  position: relative;
}
.flow-line::before {
  content: '';
  position: absolute;
  top: -3px; left: 0;
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
  animation: lineMove 3s linear infinite;
}
@keyframes lineMove {
  0% { left: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

/* ---------- 安全与合规 ---------- */
.sec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}
.sec-item {
  position: relative;
  padding: 40px 30px;
  background: linear-gradient(135deg, rgba(15, 20, 56, 0.6), transparent);
  border: 1px solid rgba(0, 246, 255, 0.15);
  text-align: center;
  transition: all 0.4s;
  overflow: hidden;
}
.sec-item::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transform: scaleX(0);
  transition: transform 0.4s;
}
.sec-item:hover { transform: translateY(-6px); border-color: var(--cyan); }
.sec-item:hover::before { transform: scaleX(1); }
.sec-item h4 {
  font-size: 20px;
  color: #fff;
  margin-bottom: 12px;
  font-weight: 700;
}
.sec-item p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.7;
}
.sec-radar {
  width: 80px; height: 80px;
  margin: 0 auto 20px;
  border: 1px solid rgba(0, 246, 255, 0.4);
  border-radius: 50%;
  position: relative;
  background:
    radial-gradient(circle, transparent 30%, rgba(0, 246, 255, 0.05) 30%),
    conic-gradient(from 0deg, transparent 0%, rgba(0, 246, 255, 0.3) 20%, transparent 25%);
  animation: radarSpin 4s linear infinite;
}
.sec-radar::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    linear-gradient(transparent 50%, rgba(0, 246, 255, 0.2) 50%) 0 0 / 100% 100%;
  mask: radial-gradient(circle, transparent 0%, transparent 49%, black 50%);
  -webkit-mask: radial-gradient(circle, transparent 0%, transparent 49%, black 50%);
}
@keyframes radarSpin {
  to { transform: rotate(360deg); }
}

.cert {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  padding: 40px;
  border: 1px solid rgba(124, 58, 237, 0.3);
  background: rgba(15, 20, 56, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
}
.cert::before {
  content: 'CERTIFICATIONS';
  position: absolute;
  top: -10px; left: 30px;
  background: var(--bg);
  padding: 0 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 3px;
}
.cert-item {
  padding: 12px 24px;
  border: 1px solid rgba(0, 246, 255, 0.3);
  background: rgba(0, 246, 255, 0.05);
  font-family: 'Orbitron', sans-serif;
  font-size: 13px;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 2px;
  clip-path: polygon(8% 0, 100% 0, 92% 100%, 0 100%);
  transition: all 0.3s;
}
.cert-item:hover {
  background: var(--cyan);
  color: #05071a;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 246, 255, 0.4);
}

/* ---------- 客户 logo 滚动 ---------- */
.logo-marquee {
  overflow: hidden;
  padding: 30px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(15, 20, 56, 0.3);
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
}
.logo-marquee::before, .logo-marquee::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 100px;
  z-index: 2;
  pointer-events: none;
}
.logo-marquee::before { left: 0; background: linear-gradient(90deg, var(--bg), transparent); }
.logo-marquee::after { right: 0; background: linear-gradient(-90deg, var(--bg), transparent); }
.logo-track {
  display: flex;
  gap: 60px;
  animation: trackMove 40s linear infinite;
  white-space: nowrap;
}
.logo-track span {
  font-family: 'Noto Serif SC', serif;
  font-size: 24px;
  color: var(--text-soft);
  font-weight: 600;
  letter-spacing: 2px;
  transition: color 0.3s;
  cursor: pointer;
}
.logo-track span:hover {
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(0, 246, 255, 0.5);
}
@keyframes trackMove {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 最终官方定位总结 ---------- */
.about-sec {
  padding: 120px 40px;
}
.about-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.about-item {
  position: relative;
  padding: 36px 24px;
  background: linear-gradient(135deg, rgba(15, 20, 56, 0.5), transparent);
  border: 1px solid rgba(124, 58, 237, 0.2);
  text-align: center;
  transition: all 0.4s;
}
.about-item:hover {
  transform: translateY(-6px);
  border-color: var(--cyan);
  box-shadow: 0 10px 30px rgba(0, 246, 255, 0.15);
}
.about-icon {
  font-size: 28px;
  color: var(--cyan);
  margin-bottom: 16px;
  font-weight: 700;
  text-shadow: 0 0 12px rgba(0, 246, 255, 0.5);
}
.about-item h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}
.about-item p {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
  font-family: 'JetBrains Mono', monospace;
}
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* ---------- CTA ---------- */
.cta {
  padding: 100px 40px;
}
.cta-box {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 60px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(0, 246, 255, 0.1));
  border: 1px solid rgba(0, 246, 255, 0.3);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  text-align: center;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 98% 100%, 0 100%);
}
.cta-deco {
  position: absolute;
  top: -100px; right: -100px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0, 246, 255, 0.3), transparent);
  border-radius: 50%;
  filter: blur(40px);
  animation: decoPulse 4s ease-in-out infinite;
}
@keyframes decoPulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.2); }
}
.cta-box h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  color: #fff;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 1px;
  position: relative;
}
.cta-box p {
  color: var(--text-dim);
  margin-bottom: 40px;
  font-size: 16px;
  position: relative;
}
.cta-form {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}
.cta-form input,
.cta-form textarea {
  padding: 14px 20px;
  background: rgba(15, 20, 56, 0.6);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: #fff;
  outline: none;
  transition: border 0.3s;
  font-family: inherit;
  border-radius: 0;
}
.cta-form input:focus,
.cta-form textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 246, 255, 0.1);
}
.cta-form input::placeholder,
.cta-form textarea::placeholder {
  color: var(--text-soft);
}
.cta-form textarea {
  grid-column: 1 / -1;
  resize: vertical;
  min-height: 100px;
  line-height: 1.7;
}
.cta-form .btn-primary.big {
  grid-column: 1 / -1;
  justify-self: center;
  min-width: 260px;
}

/* ========== 客服回复浮窗 ========== */
.cs-float {
  position: fixed; bottom: 28px; right: 28px; z-index: 150;
}
.cs-trigger {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f6ff, #7c3aed);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(0, 246, 255, 0.4);
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}
.cs-trigger:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(0, 246, 255, 0.6);
}
.cs-badge {
  position: absolute;
  top: -4px; right: -4px;
  min-width: 18px; height: 18px;
  border-radius: 9px;
  background: #ec4899;
  color: #fff;
  font-size: 10px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  padding: 0 5px;
  font-family: 'JetBrains Mono', monospace;
}

/* 面板 */
.cs-panel {
  position: absolute;
  bottom: 64px; right: 0;
  width: 380px; max-height: 520px;
  background: rgba(10, 14, 42, 0.96);
  border: 1px solid rgba(0, 246, 255, 0.25);
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 246, 255, 0.1);
  display: none;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.cs-panel.open { display: flex; }

.cs-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(124, 58, 237, 0.2);
  flex-shrink: 0;
}
.cs-panel-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; color: var(--cyan);
  font-family: 'Orbitron', sans-serif; letter-spacing: 1px;
}
.cs-panel-close {
  color: var(--text-soft); padding: 2px;
  border-radius: 4px; transition: all 0.3s;
}
.cs-panel-close:hover { color: var(--pink); }

.cs-panel-body {
  flex: 1; overflow-y: auto; padding: 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 246, 255, 0.15) transparent;
}
.cs-panel-body::-webkit-scrollbar { width: 3px; }
.cs-panel-body::-webkit-scrollbar-track { background: transparent; }
.cs-panel-body::-webkit-scrollbar-thumb {
  background: rgba(0, 246, 255, 0.15); border-radius: 3px;
}

.cs-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 40px 20px; color: var(--text-soft); text-align: center;
}
.cs-empty p { font-size: 13px; color: var(--text-dim); margin-top: 12px; }
.cs-empty span { font-size: 11px; margin-top: 4px; }

/* 咨询列表项 */
.cs-item {
  padding: 12px 14px;
  margin-bottom: 6px;
  border: 1px solid rgba(124, 58, 237, 0.15);
  border-radius: 6px;
  background: rgba(15, 20, 56, 0.4);
  cursor: pointer;
  transition: all 0.3s;
}
.cs-item:hover {
  border-color: rgba(0, 246, 255, 0.3);
  background: rgba(0, 246, 255, 0.05);
}
.cs-item-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 6px;
}
.cs-item-id {
  font-size: 10px; color: var(--cyan);
  font-family: 'JetBrains Mono', monospace;
}
.cs-item-status {
  font-size: 10px; padding: 2px 8px; border-radius: 2px;
  font-family: 'JetBrains Mono', monospace;
}
.cs-item-status.pending {
  background: rgba(255, 159, 67, 0.12); color: #ff9f43;
  border: 1px solid rgba(255, 159, 67, 0.25);
}
.cs-item-status.replied {
  background: rgba(0, 255, 136, 0.12); color: #00ff88;
  border: 1px solid rgba(0, 255, 136, 0.25);
}
.cs-item-subject {
  font-size: 13px; color: #fff; font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.cs-item-preview {
  font-size: 11px; color: var(--text-soft);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* 聊天详情 */
.cs-chat {
  flex: 1; display: flex; flex-direction: column; overflow: hidden;
}
.cs-chat-header {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(124, 58, 237, 0.2);
  flex-shrink: 0;
}
.cs-chat-back {
  color: var(--text-dim); padding: 2px;
  border-radius: 4px; transition: all 0.3s;
}
.cs-chat-back:hover { color: var(--cyan); }
.cs-chat-header span {
  font-size: 13px; font-weight: 600; color: #fff;
}

.cs-chat-body {
  flex: 1; overflow-y: auto; padding: 14px 16px;
  display: flex; flex-direction: column; gap: 12px;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 246, 255, 0.15) transparent;
}
.cs-chat-body::-webkit-scrollbar { width: 3px; }
.cs-chat-body::-webkit-scrollbar-track { background: transparent; }
.cs-chat-body::-webkit-scrollbar-thumb {
  background: rgba(0, 246, 255, 0.15); border-radius: 3px;
}

.cs-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 12px; line-height: 1.6;
}
.cs-msg.me {
  align-self: flex-end;
  background: rgba(0, 246, 255, 0.1);
  border: 1px solid rgba(0, 246, 255, 0.2);
  color: #e6e9ff;
}
.cs-msg.admin {
  align-self: flex-start;
  background: rgba(124, 58, 237, 0.12);
  border: 1px solid rgba(124, 58, 237, 0.25);
  color: #e6e9ff;
}
.cs-msg-time {
  font-size: 9px; color: var(--text-soft);
  font-family: 'JetBrains Mono', monospace;
  margin-top: 4px;
}
.cs-msg.me .cs-msg-time { text-align: right; }
.cs-msg-name {
  font-size: 10px; font-weight: 600;
  margin-bottom: 4px;
  font-family: 'JetBrains Mono', monospace;
}
.cs-msg.me .cs-msg-name { color: var(--cyan); }
.cs-msg.admin .cs-msg-name { color: #7c3aed; }

.cs-chat-input {
  display: flex; gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid rgba(124, 58, 237, 0.2);
  flex-shrink: 0;
}
.cs-chat-input input {
  flex: 1;
  padding: 8px 12px;
  background: rgba(15, 20, 56, 0.5);
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: 4px;
  color: #fff; font-size: 12px; outline: none;
}
.cs-chat-input input:focus {
  border-color: var(--cyan);
}
.cs-chat-input input::placeholder { color: var(--text-soft); }
.cs-chat-input button {
  padding: 8px 12px;
  background: linear-gradient(135deg, #00f6ff, #7c3aed);
  border-radius: 4px; color: #fff;
  transition: all 0.3s;
}
.cs-chat-input button:hover {
  box-shadow: 0 0 12px rgba(0, 246, 255, 0.4);
}

@media (max-width: 480px) {
  .cs-float { bottom: 16px; right: 16px; }
  .cs-panel { width: calc(100vw - 32px); right: 0; }
}

/* ---------- 底部 ---------- */
.footer {
  background: linear-gradient(180deg, transparent, rgba(15, 20, 56, 0.6));
  border-top: 1px solid var(--line);
  padding: 80px 40px 30px;
  position: relative;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.5;
}
.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}
.footer-col h5 {
  font-size: 14px;
  color: var(--cyan);
  margin-bottom: 20px;
  font-weight: 700;
  letter-spacing: 2px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h5::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 20px; height: 1px;
  background: var(--cyan);
}
.footer-col a, .footer-col p {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 10px;
  transition: color 0.3s;
}
.footer-col a:hover {
  color: var(--cyan);
  transform: translateX(4px);
}
.footer-desc {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}
.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: 30px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  color: var(--text-soft);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; padding: 120px 30px 60px; }
  .hero-stage { height: 420px; max-width: 420px; margin: 0 auto; }
  .shield-3d { width: 300px; height: 300px; }
  .shield-ring.r1 { width: 240px; height: 240px; }
  .shield-ring.r2 { width: 290px; height: 290px; }
  .shield-ring.r3 { width: 340px; height: 340px; }
  .sys-grid { grid-template-columns: repeat(2, 1fr); }
  .sys-card:nth-child(n) { transform: none !important; min-height: 340px; }
  .arch-layer { grid-template-columns: 60px 1fr; }
  .layer-name { grid-column: 2; }
  .layer-info { grid-column: 2; grid-row: 2; }
  .layer-tech { grid-column: 2; }
  .sec-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
  .cta-form { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions .status-text { display: none; }
  .nav-inner { padding: 16px 20px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 80px 20px; }
  .sys-grid { grid-template-columns: 1fr; }
  .flow { flex-direction: column; }
  .flow-line { width: 1px; height: 30px; background: linear-gradient(180deg, transparent, var(--cyan), transparent); align-self: center; }
  .arch-layer { padding: 30px 24px; clip-path: none; }
  .arch-axis { display: none; }
  .footer-inner { grid-template-columns: 1fr; }
}

/* ---------- 滚动显示动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s, transform 0.8s;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}