/* ============ 中科光泰 企业官网 样式 ============ */
:root {
  --bg: #050a18;
  --bg-2: #081126;
  --panel: rgba(13, 26, 51, 0.72);
  --panel-solid: #0b1730;
  --line: rgba(91, 136, 216, 0.18);
  --line-strong: rgba(91, 136, 216, 0.32);
  --text: #e9f1ff;
  --muted: #9db1d4;
  --cyan: #34e0ff;
  --blue: #3b82f6;
  --grad: linear-gradient(135deg, #34e0ff, #3b82f6);
  --radius: 18px;
  --shadow: 0 20px 60px rgba(2, 8, 26, 0.55);
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 20px);
  overflow-x: clip;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

::selection { background: rgba(52, 224, 255, 0.28); color: #fff; }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

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

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad);
  color: #04101f;
  box-shadow: 0 10px 30px rgba(52, 224, 255, 0.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(52, 224, 255, 0.38); }

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--cyan); color: var(--cyan); }

.btn-sm { padding: 9px 20px; font-size: 14px; border-radius: 10px; }

/* ============ 顶部信息条 ============ */
.topbar {
  background: linear-gradient(90deg, rgba(52, 224, 255, 0.10), rgba(59, 130, 246, 0.10));
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 7px 0;
}
.topbar-contact { display: flex; gap: 20px; }
.topbar-contact a { transition: color 0.2s; }
.topbar-contact a:hover { color: var(--cyan); }

/* ============ 主导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(5, 10, 24, 0.55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.site-header.scrolled {
  background: rgba(5, 10, 24, 0.86);
  border-bottom-color: var(--line);
  box-shadow: 0 10px 30px rgba(2, 8, 26, 0.45);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
}

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 20px; letter-spacing: 2px; font-weight: 700; }
.brand-text small { font-size: 11px; color: var(--muted); letter-spacing: 1.5px; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--muted);
  border-radius: 9px;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav-link.active { color: var(--cyan); }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  padding: 10px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h) - 35px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 84px 0 96px;
}

.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(52, 224, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(52, 224, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 45%, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 45%, #000 30%, transparent 78%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}
.hero-glow-a {
  width: 520px; height: 520px;
  left: -160px; top: -120px;
  background: radial-gradient(circle, rgba(52, 224, 255, 0.35), transparent 65%);
  animation: floatGlow 14s ease-in-out infinite;
}
.hero-glow-b {
  width: 620px; height: 620px;
  right: -220px; bottom: -180px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.32), transparent 65%);
  animation: floatGlow 18s ease-in-out infinite reverse;
}
@keyframes floatGlow {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(30px, 24px, 0) scale(1.08); }
}

.hero-radar {
  position: absolute;
  right: -140px;
  top: 50%;
  width: 720px;
  height: 480px;
  transform: translateY(-50%);
  opacity: 0.85;
}
.hero-radar > span {
  position: absolute;
  left: 50%; top: 50%;
  border: 1px solid rgba(52, 224, 255, 0.22);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.hero-radar > span:nth-child(1) { width: 240px; height: 240px; animation: spin 26s linear infinite; border-style: dashed; }
.hero-radar > span:nth-child(2) { width: 420px; height: 420px; animation: spin 40s linear infinite reverse; border-style: dashed; border-color: rgba(59, 130, 246, 0.22); }
.hero-radar > span:nth-child(3) { width: 600px; height: 600px; animation: spin 60s linear infinite; border-color: rgba(52, 224, 255, 0.10); }
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

.fiber-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.fiber-line path {
  fill: none;
  stroke: url(#fiberGrad);
  stroke-width: 1.4;
  stroke-dasharray: 5 18;
  stroke-linecap: round;
  animation: flow 4.5s linear infinite;
}
.fiber-line:nth-child(2) path { animation-duration: 6.2s; opacity: 0.75; }
.fiber-line:nth-child(3) path { animation-duration: 7.8s; opacity: 0.55; }
@keyframes flow { to { stroke-dashoffset: -230; } }

.pulse {
  fill: var(--cyan);
  filter: drop-shadow(0 0 6px rgba(52, 224, 255, 0.9));
  animation: pulseMove 4.5s linear infinite;
}
.fiber-line:nth-child(2) .pulse { animation-duration: 6.2s; }
.fiber-line:nth-child(3) .pulse { animation-duration: 7.8s; }
.fiber-line:nth-child(1) .pulse { offset-path: path("M-20 360 C 140 300, 260 420, 420 340 S 660 240, 760 300"); }
.fiber-line:nth-child(2) .pulse { offset-path: path("M-20 200 C 160 260, 300 120, 460 190 S 640 300, 760 220"); }
.fiber-line:nth-child(3) .pulse { offset-path: path("M-20 120 C 180 80, 320 200, 500 130 S 660 70, 760 110"); }
@keyframes pulseMove {
  0% { offset-distance: 0%; opacity: 0; }
  6% { opacity: 1; }
  94% { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  align-items: center;
  gap: 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.pulse-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(52, 224, 255, 0.6);
  animation: dotPulse 2s infinite;
}
@keyframes dotPulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 224, 255, 0.55); }
  70% { box-shadow: 0 0 0 10px rgba(52, 224, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 224, 255, 0); }
}

.hero h1 {
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1.22;
  letter-spacing: 2px;
  font-weight: 800;
  margin-bottom: 22px;
}
.hero-sub {
  font-size: 17px;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.hero-points { display: flex; gap: 26px; flex-wrap: wrap; }
.hero-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--muted);
}
.hero-points li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad);
}

.hero-spec {
  position: relative;
  background: linear-gradient(160deg, rgba(52, 224, 255, 0.10), rgba(59, 130, 246, 0.06));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-spec::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}
.spec-title { font-size: 15px; letter-spacing: 2px; color: var(--muted); margin-bottom: 18px; }
.spec-codes { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
.spec-codes span {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--cyan);
  border: 1px solid rgba(52, 224, 255, 0.35);
  border-radius: 8px;
  padding: 5px 12px;
  background: rgba(52, 224, 255, 0.07);
}
.spec-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.metric {
  background: rgba(5, 12, 28, 0.55);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
}
.metric strong {
  display: block;
  font-size: 24px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.metric small { font-size: 12px; color: var(--muted); }

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  width: 22px; height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
}
.hero-scroll span {
  position: absolute;
  left: 50%; top: 7px;
  width: 4px; height: 8px;
  margin-left: -2px;
  border-radius: 4px;
  background: var(--cyan);
  animation: scrollHint 1.8s infinite;
}
@keyframes scrollHint {
  0% { opacity: 0; transform: translateY(0); }
  35% { opacity: 1; }
  100% { opacity: 0; transform: translateY(14px); }
}

/* ============ 通用 section ============ */
.section { position: relative; padding: 104px 0; }
.section::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: min(1180px, 92%);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.section-head { text-align: center; max-width: 780px; margin: 0 auto 56px; }
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-sub { color: var(--muted); font-size: 16px; }

.products { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%); }
.applications { background: var(--bg-2); }
.advantages { background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 100%); }

/* ============ 产品中心 ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
  overflow: hidden;
}
.product-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}
.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(52, 224, 255, 0.42);
  box-shadow: 0 24px 50px rgba(2, 8, 26, 0.5);
}
.product-card:hover::before { transform: scaleX(1); }

.pc-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.pc-icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  background: rgba(52, 224, 255, 0.08);
  border: 1px solid rgba(52, 224, 255, 0.28);
  display: inline-block;
}
.pc-tag {
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--cyan);
  border: 1px solid rgba(52, 224, 255, 0.28);
  background: rgba(52, 224, 255, 0.06);
  border-radius: 20px;
  padding: 4px 12px;
}
.product-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; letter-spacing: 0.5px; }
.pc-desc { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.pc-specs { margin-bottom: 18px; display: grid; gap: 8px; }
.pc-specs li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  color: #c6d6f2;
}
.pc-specs li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: 0.8;
}
.pc-scene {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.5px;
}
.pc-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  transition: color 0.2s;
}
.pc-link:hover { text-decoration: underline; }

.icon-das {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M10 26c3-5 5-5 7 0s4 5 7 0 4-5 7 0 3 5 7 0' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M6 32c6-8 11-8 18 0s12 8 18 0' fill='none' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.7'/%3E%3Cpath d='M10 20c3-3 5-3 7 0M27 20c3-3 5-3 7 0' fill='none' stroke='%233B82F6' stroke-width='1.4' stroke-linecap='round' opacity='0.55'/%3E%3Ccircle cx='24' cy='24' r='20' fill='none' stroke='%2334E0FF' stroke-opacity='0.25'/%3E%3C/svg%3E");
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;
}
.icon-dvs {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M8 22h5l4-8 6 16 5-12 3 4h9' fill='none' stroke='%2334E0FF' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3Ccircle cx='24' cy='24' r='20' fill='none' stroke='%2334E0FF' stroke-opacity='0.25'/%3E%3C/svg%3E");
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;
}
.icon-dts {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Crect x='18' y='6' width='12' height='30' rx='6' fill='none' stroke='%2334E0FF' stroke-width='2.2'/%3E%3Cpath d='M22 15c0-2.5 2-4 2-4s2 1.5 2 4v4h-4z' fill='%2334E0FF'/%3E%3Cpath d='M14 30c-4 4-4 10 0 12M34 30c4 4 4 10 0 12' fill='none' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.7'/%3E%3Ccircle cx='24' cy='24' r='20' fill='none' stroke='%2334E0FF' stroke-opacity='0.25'/%3E%3C/svg%3E");
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;
}
.icon-dss {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M8 36c8-16 16-16 24 0M8 28c8-12 16-12 24 0M8 20c8-8 16-8 24 0' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M8 12h32' stroke='%233B82F6' stroke-width='1.4' stroke-dasharray='3 4' opacity='0.6'/%3E%3Ccircle cx='24' cy='24' r='20' fill='none' stroke='%2334E0FF' stroke-opacity='0.25'/%3E%3C/svg%3E");
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;
}
.icon-ofdr {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Ccircle cx='24' cy='24' r='9' fill='none' stroke='%2334E0FF' stroke-width='2.2'/%3E%3Cpath d='M24 6v6M24 36v6M6 24h6M36 24h6M12 12l4 4M32 32l4 4M36 12l-4 4M16 32l-4 4' stroke='%233B82F6' stroke-width='1.5' stroke-linecap='round' opacity='0.75'/%3E%3Ccircle cx='24' cy='24' r='2.6' fill='%2334E0FF'/%3E%3Ccircle cx='24' cy='24' r='20' fill='none' stroke='%2334E0FF' stroke-opacity='0.25'/%3E%3C/svg%3E");
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;
}
.icon-sys {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Ccircle cx='24' cy='15' r='6' fill='none' stroke='%2334E0FF' stroke-width='2'/%3E%3Ccircle cx='13' cy='33' r='6' fill='none' stroke='%2334E0FF' stroke-width='2'/%3E%3Ccircle cx='35' cy='33' r='6' fill='none' stroke='%2334E0FF' stroke-width='2'/%3E%3Cpath d='M20 20l-3 8M28 20l3 8M13 27v0M35 27v0' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.8'/%3E%3Ccircle cx='24' cy='24' r='20' fill='none' stroke='%2334E0FF' stroke-opacity='0.25'/%3E%3C/svg%3E");
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;
}

/* ============ 技术原理 ============ */
.technology { background: var(--bg); }
.tech-principle {
  margin-bottom: 44px;
  padding: 34px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(52, 224, 255, 0.06), rgba(59, 130, 246, 0.05));
}
.tech-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.flow-node {
  flex: 1 1 150px;
  text-align: center;
  background: rgba(5, 12, 28, 0.65);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 16px 12px;
}
.flow-node strong { display: block; font-size: 15px; margin-bottom: 3px; }
.flow-node small { font-size: 12px; color: var(--muted); }
.flow-line {
  flex: 0 1 64px;
  position: relative;
  height: 2px;
  background: rgba(52, 224, 255, 0.25);
}
.flow-line::before, .flow-line::after {
  content: "";
  position: absolute;
  top: -2.5px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}
.flow-line::before { left: 0; }
.flow-line::after { right: 0; }
.flow-line i {
  position: absolute;
  top: -1.5px; left: 0;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #fff;
  animation: flowDot 2.4s linear infinite;
}
@keyframes flowDot { to { left: calc(100% - 5px); } }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.tech-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  background: var(--panel);
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.tech-card:hover { transform: translateY(-4px); border-color: rgba(52, 224, 255, 0.4); }
.tc-code {
  display: inline-block;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--cyan);
  background: rgba(52, 224, 255, 0.09);
  border: 1px solid rgba(52, 224, 255, 0.3);
  border-radius: 8px;
  padding: 4px 10px;
  margin-bottom: 14px;
}
.tech-card h3 { font-size: 16px; margin-bottom: 8px; }
.tech-card p { font-size: 13.5px; color: var(--muted); }

/* ============ 应用场景 ============ */
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.app-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
  background: rgba(13, 26, 51, 0.5);
  transition: transform 0.3s var(--ease), border-color 0.3s, background 0.3s;
}
.app-card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 224, 255, 0.4);
  background: rgba(13, 26, 51, 0.85);
}
.app-icon {
  display: inline-block;
  width: 44px; height: 44px;
  border-radius: 12px;
  background-color: rgba(52, 224, 255, 0.08);
  background-size: 58%;
  background-position: center;
  background-repeat: no-repeat;
  border: 1px solid rgba(52, 224, 255, 0.26);
  margin-bottom: 14px;
}
.app-card h3 { font-size: 16px; margin-bottom: 8px; }
.app-card p { font-size: 13px; color: var(--muted); }
.app-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--cyan);
  transition: color 0.2s;
}
.app-link:hover { text-decoration: underline; }

.ai-fence { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M10 40V10M20 40V10M30 40V10M40 40V10' stroke='%2334E0FF' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M8 16h34M8 26h34M8 36h34' stroke='%233B82F6' stroke-width='1.6' opacity='0.75'/%3E%3C/svg%3E"); }
.ai-pipe { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M6 30h36M6 34h36' stroke='%2334E0FF' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M14 30c0-6 20-6 20 0M18 24c4-8 8-8 12 0' fill='none' stroke='%233B82F6' stroke-width='1.5' stroke-linecap='round' opacity='0.7'/%3E%3Ccircle cx='24' cy='22' r='2.4' fill='%2334E0FF'/%3E%3C/svg%3E"); }
.ai-power { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M26 6l-12 20h10l-4 16 14-22h-10z' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linejoin='round'/%3E%3Cpath d='M10 40h28' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.7'/%3E%3C/svg%3E"); }
.ai-sea { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M4 30c6-8 11-8 17 0s11 8 17 0' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M8 38c5-5 9-5 14 0s9 5 14 0' fill='none' stroke='%233B82F6' stroke-width='1.5' stroke-linecap='round' opacity='0.7'/%3E%3Cpath d='M24 8v12M24 20l-5-6M24 20l5-6' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.8'/%3E%3C/svg%3E"); }
.ai-tunnel { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M4 40V18a20 20 0 0 1 40 0v22' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M12 40V24a12 12 0 0 1 24 0v16' fill='none' stroke='%233B82F6' stroke-width='1.6' opacity='0.75'/%3E%3Cpath d='M4 32h40M4 40h40' stroke='%233B82F6' stroke-width='1.3' stroke-dasharray='4 4' opacity='0.6'/%3E%3C/svg%3E"); }
.ai-rail { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M6 20h36M6 32h36' stroke='%2334E0FF' stroke-width='2.2' stroke-linecap='round'/%3E%3Cpath d='M6 26h36' stroke='%233B82F6' stroke-width='1.4' stroke-dasharray='5 4' opacity='0.7'/%3E%3Cpath d='M14 12c4-6 6-6 10 0s6 6 10 0' fill='none' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.7'/%3E%3C/svg%3E"); }
.ai-road { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M8 40L24 6l16 34' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linejoin='round'/%3E%3Cpath d='M24 14v20M18 30l-4 6M30 30l4 6' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.75'/%3E%3C/svg%3E"); }
.ai-slope { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M4 40L30 8l14 32z' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linejoin='round'/%3E%3Cpath d='M10 34l8-8M20 34l8-8' stroke='%233B82F6' stroke-width='1.5' stroke-dasharray='3 4' opacity='0.75'/%3E%3C/svg%3E"); }
.ai-tank { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M14 10h20v12c0 8-4 16-10 16s-10-8-10-16z' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linejoin='round'/%3E%3Cpath d='M10 38h28' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.7'/%3E%3Cpath d='M24 12v14M20 20h8' stroke='%233B82F6' stroke-width='1.5' stroke-linecap='round' opacity='0.8'/%3E%3C/svg%3E"); }
.ai-cable { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Ccircle cx='14' cy='24' r='8' fill='none' stroke='%2334E0FF' stroke-width='2.2'/%3E%3Ccircle cx='34' cy='24' r='8' fill='none' stroke='%2334E0FF' stroke-width='2.2'/%3E%3Cpath d='M18 24h12' stroke='%233B82F6' stroke-width='2' stroke-dasharray='3 4' opacity='0.8'/%3E%3Ccircle cx='24' cy='24' r='2.4' fill='%2334E0FF'/%3E%3C/svg%3E"); }
.ai-urban { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M6 40V12h12v28M18 40V6h12v34M30 40V20h12v20' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linejoin='round'/%3E%3Cpath d='M2 40h44' stroke='%233B82F6' stroke-width='1.6' stroke-linecap='round' opacity='0.7'/%3E%3C/svg%3E"); }
.ai-industrial { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M6 40V14l10 6V14l10 6V14l10 6v20z' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linejoin='round'/%3E%3Cpath d='M14 30h4v6h-4zM22 30h4v6h-4zM30 30h4v6h-4z' stroke='%233B82F6' stroke-width='1.3' opacity='0.8'/%3E%3C/svg%3E"); }

/* ============ 核心优势 ============ */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.adv-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  background: var(--panel);
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.adv-card:hover { transform: translateY(-4px); border-color: rgba(52, 224, 255, 0.4); }
.adv-num {
  position: absolute;
  top: 16px; right: 22px;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 40px;
  font-weight: 800;
  color: rgba(52, 224, 255, 0.12);
  line-height: 1;
}
.adv-card h3 { font-size: 17px; margin-bottom: 10px; position: relative; }
.adv-card p { font-size: 14px; color: var(--muted); position: relative; }

/* ============ 关于我们 ============ */
.about { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%); }
.about-wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(52, 224, 255, 0.06), rgba(59, 130, 246, 0.05));
  padding: 48px;
}
.about-copy h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; letter-spacing: 1px; margin-bottom: 20px; }
.about-copy p { color: var(--muted); font-size: 15px; margin-bottom: 16px; }
.about-points { display: grid; gap: 10px; margin-top: 22px; }
.about-points li {
  position: relative;
  padding-left: 24px;
  color: #c9d8f2;
  font-size: 14px;
}
.about-points li::before {
  content: "";
  position: absolute;
  left: 0; top: 7px;
  width: 14px; height: 8px;
  border-left: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(-45deg);
}
.about-panel svg { width: 100%; height: auto; }

/* ============ 联系我们 ============ */
.contact { background: var(--bg-2); }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.contact-card {
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 30px 20px;
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.contact-card:hover { transform: translateY(-4px); border-color: rgba(52, 224, 255, 0.4); }
.cc-icon {
  display: inline-block;
  width: 52px; height: 52px;
  border-radius: 14px;
  background-color: rgba(52, 224, 255, 0.08);
  background-size: 56%;
  background-position: center;
  background-repeat: no-repeat;
  border: 1px solid rgba(52, 224, 255, 0.28);
  margin-bottom: 16px;
}
.contact-card h3 { font-size: 15px; color: var(--muted); font-weight: 600; margin-bottom: 8px; letter-spacing: 1px; }
.contact-card p { font-size: 15px; color: var(--text); line-height: 1.7; }
.contact-card a:hover { color: var(--cyan); }

.ci-phone { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M14 6h8l3 9-5 4c4 7 10 12 16 14l4-5 8 4v7a4 4 0 0 1-4 4C24 43 5 24 5 10a4 4 0 0 1 4-4z' fill='none' stroke='%2334E0FF' stroke-width='2.4' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.ci-mail { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Crect x='5' y='10' width='38' height='28' rx='4' fill='none' stroke='%2334E0FF' stroke-width='2.4'/%3E%3Cpath d='M6 12l18 14L42 12' fill='none' stroke='%2334E0FF' stroke-width='2.2' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.ci-pin { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath d='M24 43s14-12 14-24a14 14 0 1 0-28 0c0 12 14 24 14 24z' fill='none' stroke='%2334E0FF' stroke-width='2.4' stroke-linejoin='round'/%3E%3Ccircle cx='24' cy='19' r='5' fill='none' stroke='%2334E0FF' stroke-width='2.2'/%3E%3C/svg%3E"); }
.ci-time { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Ccircle cx='24' cy='24' r='18' fill='none' stroke='%2334E0FF' stroke-width='2.4'/%3E%3Cpath d='M24 12v12l8 6' fill='none' stroke='%2334E0FF' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }

/* ============ 页脚 ============ */
.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(5, 10, 24, 0.4), rgba(5, 10, 24, 0.9));
  padding-top: 56px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 36px;
  padding-bottom: 44px;
}
.footer-brand p { margin-top: 16px; font-size: 13.5px; color: var(--muted); max-width: 340px; }
.footer-col h4 {
  font-size: 15px;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
  color: var(--text);
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 28px; height: 2px;
  background: var(--grad);
  border-radius: 2px;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col li { font-size: 13.5px; color: var(--muted); }
.footer-col li a { transition: color 0.2s; }
.footer-col li a:hover { color: var(--cyan); }

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 18px 0;
  font-size: 13px;
  color: var(--muted);
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.icp a { color: var(--muted); transition: color 0.2s; }
.icp a:hover { color: var(--cyan); }

/* ============ 返回顶部 ============ */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  z-index: 80;
  width: 46px; height: 46px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: rgba(13, 26, 51, 0.85);
  color: var(--cyan);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  backdrop-filter: blur(8px);
}
.back-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-top:hover { border-color: var(--cyan); }

/* ============ 滚动显现动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .about-wrap { grid-template-columns: 1fr; padding: 36px; }
  .hero-radar { right: -220px; }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 0; right: 0;
    width: min(320px, 82vw);
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 8px;
    padding: 90px 26px 30px;
    background: rgba(6, 12, 28, 0.97);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    box-shadow: -20px 0 60px rgba(2, 8, 26, 0.6);
  }
  .main-nav.open { transform: translateX(0); }
  .nav-link { font-size: 16px; width: 100%; padding: 12px 14px; }
  .nav-link.active::after { left: 14px; right: auto; width: 42px; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .hero { min-height: auto; padding: 72px 0 88px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-radar { opacity: 0.4; right: -260px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .topbar-slogan { display: none; }
}

@media (max-width: 600px) {
  .section { padding: 72px 0; }
  .product-grid, .tech-grid, .app-grid, .adv-grid, .contact-grid { grid-template-columns: 1fr; }
  .tech-flow { flex-direction: column; }
  .flow-line { width: 2px; height: 30px; flex: none; }
  .flow-line i { display: none; }
  .spec-metrics { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn { flex: 1; }
  .footer-inner { grid-template-columns: 1fr; gap: 26px; }
  .footer-bottom-inner { flex-direction: column; align-items: flex-start; }
  .topbar-contact { gap: 12px; font-size: 12px; }
  .about-wrap { padding: 26px 20px; }
  .hero-points { gap: 14px; }
}