:root {
  --ink: #172f45;
  --muted: #5c6f7e;
  --blue: #176ea4;
  --blue-hover: #125985;
  --line: #e0e8ed;
  --teal: #79c9cc;
  --teal-glow: rgba(121, 201, 204, 0.4);
  --paper: #f4f7fb;
  --card-bg: #ffffff;
  
  /* Motion Tokens */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out-sine: cubic-bezier(0.37, 0, 0.63, 1);
  --dur-micro: 180ms;
  --dur-base: 320ms;
  --dur-reveal: 680ms;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body { 
  margin: 0; 
  color: var(--ink); 
  background: #fff; 
  font: 16px/1.85 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; 
  -webkit-font-smoothing: antialiased; 
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button { border: 0; font: inherit; color: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; display: block; }
svg { display: block; }
h1, h2, h3, p { margin: 0; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid #3396d0; outline-offset: 4px; }

.container { width: min(1280px, calc(100% - 96px)); margin: auto; }
.icon-defs { position: absolute; width: 0; height: 0; overflow: hidden; pointer-events: none; }
.icon { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.skip { position: fixed; top: -80px; left: 15px; padding: 10px; background: white; z-index: 100; border-radius: 6px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.skip:focus { top: 12px; }

/* 顶部滚动进度指示器 (Scroll Progress Indicator) */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3.5px;
  background: linear-gradient(90deg, #176ea4 0%, #79c9cc 55%, #38bdf8 100%);
  z-index: 1000;
  transform-origin: 0 50%;
  transform: scaleX(0);
  box-shadow: 0 0 10px rgba(121, 201, 204, 0.85);
  pointer-events: none;
}

@media (prefers-reduced-motion: no-preference) {
  @supports ((animation-timeline: scroll())) {
    @keyframes grow-progress {
      from { transform: scaleX(0); }
      to { transform: scaleX(1); }
    }
    #scroll-progress {
      animation: grow-progress auto linear;
      animation-timeline: scroll();
    }
  }
}

/* 导航栏 (Header) */
.header { 
  height: 90px; 
  background: rgba(255, 255, 255, 0.94); 
  position: sticky; 
  top: 0; 
  z-index: 50; 
  border-bottom: 1px solid rgba(224, 232, 237, 0.85); 
  backdrop-filter: blur(18px); 
  transition: box-shadow 0.3s ease, height 0.3s ease;
}
.header.scrolled {
  box-shadow: 0 8px 24px rgba(16, 46, 70, 0.06);
}
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-symbol { width: 44px; height: 44px; color: #176086; transition: transform 0.3s var(--ease-spring); }
.brand:hover .brand-symbol { transform: scale(1.05) rotate(1deg); }
.brand strong { font-size: 26px; letter-spacing: 2.5px; font-weight: 750; display: block; line-height: 1.3; }
.brand small { display: block; font-size: 10px; letter-spacing: 0.8px; font-weight: 600; line-height: 1.6; color: var(--muted); }
nav { display: flex; align-items: center; gap: 32px; height: 100%; font-size: 15.5px; font-weight: 500; }
nav > a { height: 100%; display: flex; align-items: center; position: relative; white-space: nowrap; transition: color 0.2s; }
nav > a:hover, nav > a.active { color: var(--blue); }
nav > a.active::after { 
  content: ""; 
  position: absolute; 
  bottom: 20px; 
  left: 0; 
  width: 24px; 
  height: 2.5px; 
  border-radius: 2px; 
  background: var(--blue); 
  animation: barPop 0.3s var(--ease-out-expo);
}
@keyframes barPop {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}
nav .nav-contact { 
  height: 44px; 
  background: #edf5fa; 
  border: 1px solid #dceaf3; 
  border-radius: 8px; 
  padding: 0 18px; 
  gap: 16px; 
  color: var(--blue); 
  font-weight: 600;
  transition: all 0.2s var(--ease-spring);
}
nav .nav-contact:hover { 
  background: #e2f0f9; 
  border-color: #b7d6ea;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(23, 110, 164, 0.12);
}
nav .nav-contact::after { display: none; }
.menu-toggle { display: none; }

/* 英雄区域 (Hero) */
.hero { 
  min-height: 720px; 
  position: relative; 
  background: #0d263b; 
  color: #fff; 
  isolation: isolate; 
  overflow: hidden; 
}
.hero-photo, .hero-shade, .hero-grid { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
.hero-photo { object-fit: cover; object-position: 75% 52%; opacity: 0.88; transform: scale(1.02); transition: transform 6s ease-out; }
.hero:hover .hero-photo { transform: scale(1); }
.hero-shade { 
  background: 
    linear-gradient(90deg, rgba(8, 32, 52, 0.94) 0%, rgba(8, 32, 52, 0.85) 35%, rgba(8, 32, 52, 0.45) 70%, rgba(8, 32, 52, 0.25) 100%), 
    linear-gradient(0deg, rgba(9, 32, 51, 0.95) 0%, transparent 45%); 
}
.hero-grid { 
  background-image: linear-gradient(rgba(185, 217, 236, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(185, 217, 236, 0.05) 1px, transparent 1px); 
  background-size: 80px 80px; 
  mask-image: radial-gradient(circle at 35% 45%, black 40%, transparent 80%); 
}

/* 激光扫描动态光束 */
.hero-laser-beam {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(121, 201, 204, 0.7) 40%, #79c9cc 50%, rgba(121, 201, 204, 0.7) 60%, transparent 100%);
  box-shadow: 0 0 16px rgba(121, 201, 204, 0.95);
  animation: laserScan 8s infinite cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  z-index: -1;
}
@keyframes laserScan {
  0% { top: 0%; opacity: 0; }
  15% { opacity: 0.9; }
  85% { opacity: 0.9; }
  100% { top: 100%; opacity: 0; }
}

.hero-content { 
  padding-top: clamp(70px, 8vh, 100px); 
  padding-bottom: 96px; 
}
.eyebrow { font-size: 12px; letter-spacing: 2px; font-weight: 650; color: var(--blue); line-height: 1.5; margin-bottom: 16px; }
.eyebrow.light { color: #b4dbe7; }
.eyebrow i { 
  display: inline-block; 
  width: 7px; height: 7px; 
  background: var(--teal); 
  border-radius: 50%; 
  vertical-align: 1px; 
  margin-right: 8px; 
  box-shadow: 0 0 8px var(--teal);
  animation: pulseDot 2s infinite;
}
h1 { font-size: clamp(44px, 4.2vw, 66px); font-weight: 650; line-height: 1.35; letter-spacing: 1.5px; }
h1 .dot-accent { color: var(--teal); display: inline-block; animation: textShine 3s infinite alternate; }
@keyframes textShine {
  0% { opacity: 0.8; filter: drop-shadow(0 0 4px var(--teal)); }
  100% { opacity: 1; filter: drop-shadow(0 0 12px var(--teal)); }
}
.hero-content > p { color: #d6e4ed; font-size: 17.5px; line-height: 1.95; margin-top: 22px; max-width: 680px; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 32px; }
.button { 
  display: inline-flex; 
  align-items: center; 
  justify-content: space-between; 
  gap: 24px; 
  min-height: 52px; 
  padding: 12px 24px; 
  border-radius: 8px; 
  font-size: 15.5px; 
  font-weight: 600; 
  line-height: 1.6; 
  transition: all 0.25s var(--ease-spring); 
}
.button:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(8, 37, 61, 0.22); }
.button-white { background: #fff; color: #16394f; }
.button-white:hover { background: #f0f7fb; color: var(--blue); }
.hero-link { font-size: 15.5px; color: #e4eff4; display: flex; align-items: center; gap: 12px; font-weight: 500; transition: color 0.2s; }
.hero-link:hover { color: var(--teal); }

/* 英雄区精密指标仪表卡 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 52px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.metric-card {
  background: rgba(8, 32, 52, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 12px;
  padding: 16px 18px;
  backdrop-filter: blur(14px);
  transition: all 0.25s var(--ease-spring);
}
.metric-card:hover {
  border-color: rgba(121, 201, 204, 0.55);
  transform: translateY(-3px);
  background: rgba(10, 40, 65, 0.78);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.metric-head { font-size: 12px; color: #a4c3d8; display: flex; align-items: center; margin-bottom: 6px; }
.metric-dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 6px var(--teal);
  margin-right: 6px;
}
.metric-val { font-size: 20px; font-weight: 750; color: #ffffff; letter-spacing: 0.4px; }
.metric-val small { font-size: 12px; font-weight: 400; color: #b7d6ea; margin-left: 2px; }
.metric-desc { font-size: 11.5px; color: #82a3ba; margin-top: 4px; }

.hero-caption { position: absolute; bottom: 26px; left: 48px; display: flex; align-items: center; gap: 10px; font-size: 12px; letter-spacing: 0.6px; color: #b5c7d5; }
.status-dot { width: 6px; height: 6px; background: var(--teal); border-radius: 50%; box-shadow: 0 0 8px var(--teal); }
.caption-line { width: 32px; height: 1px; background: rgba(255, 255, 255, 0.3); margin: 0 4px; }
.scroll-cue { position: absolute; right: 48px; bottom: 22px; display: flex; align-items: center; gap: 16px; font-size: 13px; color: #d0e0ec; }
.scroll-icon { display: flex; width: 38px; height: 38px; border: 1px solid rgba(188, 210, 220, 0.4); border-radius: 50%; justify-content: center; align-items: center; transition: all 0.2s; }
.scroll-cue:hover .scroll-icon { background: rgba(255, 255, 255, 0.15); transform: translateY(2px); }

/* 跑马灯标语 (Intro Strip) */
.intro-strip { border-bottom: 1px solid var(--line); background: #fafcff; }
.intro-strip-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 14.5px; }
.intro-strip-inner > span:first-child { color: var(--blue); font-weight: 650; }
.intro-strip-inner > span + span { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.intro-strip-inner > span + span::before { content: ""; width: 4px; height: 4px; background: #9ebacb; border-radius: 50%; }

/* 产品模块 (Products) */
.section { padding-top: 96px; padding-bottom: 96px; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; margin-bottom: 38px; }
h2 { font-size: 38px; line-height: 1.45; letter-spacing: 0.3px; font-weight: 650; }
.section-heading p { font-size: 16px; line-height: 1.9; color: var(--muted); }

/* 产品旗舰主卡片 */
.product-feature { 
  display: grid; 
  grid-template-columns: 1.08fr 1fr; 
  border: 1px solid #e1e9ef; 
  border-radius: 20px; 
  box-shadow: 0 16px 48px rgba(22, 62, 100, 0.05); 
  overflow: hidden; 
  background: #ffffff;
}
.product-visual { 
  background: #eef2f5; 
  position: relative; 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  min-height: 540px; 
  overflow: hidden; 
}
.product-visual img { 
  width: 96%; 
  height: auto; 
  mix-blend-mode: multiply; 
  transition: transform 0.6s var(--ease-spring); 
}
.product-feature:hover .product-visual img { transform: scale(1.04); }
.image-label { position: absolute; top: 24px; left: 26px; z-index: 1; letter-spacing: 1px; font-size: 12px; color: #536b7b; font-weight: 500; }
.visual-bottom { position: absolute; bottom: 22px; left: 26px; right: 26px; display: flex; justify-content: space-between; align-items: center; color: #5d7585; font-size: 13px; }
.visual-bottom > span:first-child { letter-spacing: 2px; font-size: 13px; font-weight: 650; }
.visual-bottom > span:last-child { display: flex; align-items: center; gap: 8px; }

.product-info { padding: 36px 38px 34px; min-width: 0; }
.product-info-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.tag { display: inline-block; background: #eaf3fa; border: 1px solid #dfeef7; border-radius: 5px; padding: 4px 12px; color: #276786; font-size: 13px; line-height: 1.6; font-weight: 600; }
.tag-status { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: #0284c7; background: #f0f9ff; border: 1px solid #bae6fd; padding: 4px 11px; border-radius: 999px; font-weight: 500; }
.pulse-ring { width: 7px; height: 7px; border-radius: 50%; background: #0284c7; box-shadow: 0 0 0 2px rgba(2, 132, 199, 0.2); animation: pulseDot 2s infinite; }
.product-info h3 { font-size: 32px; font-weight: 650; line-height: 1.45; margin-top: 14px; }
.model { font-size: 12.5px; color: #647d8f; letter-spacing: 1.4px; margin-top: 8px; font-weight: 600; }

/* 结构剖析交互切换 */
.layer-selector { display: flex; gap: 8px; margin: 18px 0 14px; flex-wrap: wrap; }
.layer-btn {
  font-size: 13px; 
  font-weight: 550;
  padding: 6px 14px; 
  border-radius: 6px;
  background: #f1f5f9; 
  color: #475569;
  border: 1px solid #e2e8f0;
  transition: all 0.2s var(--ease-spring);
}
.layer-btn:hover { background: #e2e8f0; color: #0f172a; }
.layer-btn.active { 
  background: #176ea4; 
  color: #ffffff; 
  border-color: #176ea4; 
  box-shadow: 0 4px 12px rgba(23, 110, 164, 0.25); 
}

.product-description { font-size: 15.5px; color: var(--muted); margin-top: 14px; line-height: 1.85; min-height: 56px; transition: opacity 0.2s; }
.quick-specs { margin: 18px 0 22px; }
.quick-specs > div { display: flex; align-items: baseline; justify-content: space-between; border-bottom: 1px solid #e9eef1; padding: 9px 0; gap: 12px; }
.quick-specs dt { color: var(--muted); font-size: 14px; flex-shrink: 0; }
.quick-specs dd { margin: 0; font-size: 15.5px; font-weight: 550; text-align: right; }
.quick-specs small { font-size: 12.5px; color: var(--muted); font-weight: 400; }

.product-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.text-button { 
  background: #eff6fb; 
  border: 1px solid #dceaf4; 
  border-radius: 8px; 
  padding: 10px 18px; 
  min-height: 46px; 
  font-size: 15px; 
  font-weight: 600;
  display: inline-flex; 
  align-items: center; 
  gap: 16px; 
  color: var(--blue); 
  line-height: 1.6; 
  transition: all 0.2s var(--ease-spring); 
}
.text-button:hover { background: #e1eff8; border-color: #b7d5e8; transform: translateY(-1px); }
.mini-btn { min-height: 46px; padding: 10px 18px; font-size: 14.5px; }

/* 结构亮点卡片 */
.feature-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding-top: 28px; }
.feature-row article { display: flex; gap: 16px; padding: 24px 22px; background: #f8fafc; border: 1px solid #edf1f4; border-radius: 14px; }
.feature-number { width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 12px; font-weight: 700; color: var(--blue); border: 1px solid #d8e5ef; background: white; border-radius: 50%; box-shadow: 0 2px 6px rgba(0,0,0,0.03); }
.feature-row h3 { font-size: 18px; font-weight: 650; margin-bottom: 8px; }
.feature-row p { font-size: 14px; color: var(--muted); line-height: 1.85; }

/* 振动仿真波形对比组件 */
.vibration-simulator {
  margin-top: 36px;
  background: #ffffff;
  border: 1px solid #e1e9f0;
  border-radius: 18px;
  padding: 28px 30px;
  box-shadow: 0 12px 36px rgba(22, 62, 100, 0.04);
}
.sim-header { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin-bottom: 18px; }
.sim-header h3 { font-size: 21px; font-weight: 650; color: var(--ink); }
.sim-legend { display: flex; gap: 22px; font-size: 13px; font-weight: 500; }
.legend-item { display: flex; align-items: center; gap: 8px; }
.legend-item .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.legend-item .dot.raw { background: #ef5350; box-shadow: 0 0 8px rgba(239, 83, 80, 0.5); }
.legend-item .dot.damped { background: #176ea4; box-shadow: 0 0 8px rgba(23, 110, 164, 0.5); }
.sim-canvas-wrap {
  background: #091c2b;
  border-radius: 12px;
  padding: 16px 20px;
  overflow: hidden;
  position: relative;
}
.sim-canvas-wrap::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, #091c2b 0%, transparent 6%, transparent 94%, #091c2b 100%);
  pointer-events: none;
}
.sim-svg { width: 100%; height: 130px; display: block; }
.wave-raw {
  stroke-dasharray: 8 4;
  animation: waveFlow 5s linear infinite;
}
.wave-damped {
  animation: wavePulse 3s ease-in-out infinite alternate;
}
@keyframes waveFlow {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -120; }
}
@keyframes wavePulse {
  0% { transform: scaleY(0.9); transform-origin: 50% 90px; }
  100% { transform: scaleY(1.1); transform-origin: 50% 90px; }
}
.sim-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 16px; font-size: 13px; color: var(--muted); gap: 16px; flex-wrap: wrap;
}
.sim-footer strong { color: var(--blue); }
.sim-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: #eff6fb; color: var(--blue);
  border: 1px solid #d8e8f4; padding: 4px 12px; border-radius: 6px; font-weight: 600; font-size: 12px;
}
.sim-badge .icon { width: 16px; height: 16px; }

/* 业务领域 (Business Areas) */
.expertise { background: linear-gradient(180deg, #f4f7fb, #f8fafc); }
.business-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.business-card { 
  min-height: 290px; 
  padding: 30px 28px 26px; 
  border: 1px solid #e1e9f2; 
  border-radius: 16px; 
  background: white; 
  position: relative; 
  box-shadow: 0 8px 32px rgba(20, 56, 90, 0.03); 
  transition: all var(--dur-base) var(--ease-spring); 
}
.business-card:hover { 
  transform: translateY(-5px); 
  border-color: #b6d1e6; 
  box-shadow: 0 18px 36px rgba(20, 56, 90, 0.08); 
}
.business-card > svg { 
  width: 52px; height: 52px; 
  padding: 10px; 
  border-radius: 12px; 
  background: #edf5fc; 
  fill: none; 
  stroke: #2c78a9; 
  stroke-width: 1.6; 
  stroke-linecap: round; 
  stroke-linejoin: round; 
  margin-bottom: 22px; 
  transition: transform 0.25s var(--ease-spring);
}
.business-card:hover > svg { transform: scale(1.08); }
.card-index { position: absolute; right: 26px; top: 34px; font-size: 12px; color: #7f93a3; font-weight: 600; }
.business-card h3 { font-size: 20px; font-weight: 650; margin-bottom: 10px; line-height: 1.55; }
.business-card p { font-size: 14.5px; color: var(--muted); line-height: 1.85; }
.card-tag { display: inline-block; font-size: 11px; letter-spacing: 0.8px; color: #53758e; background: #f0f6fa; padding: 2px 8px; border-radius: 4px; margin-top: 20px; font-weight: 600; }

/* 鼠标微聚光卡片效果 (Mouse Spotlight) */
.spotlight-card {
  --mx: 50%;
  --my: 50%;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(23, 110, 164, 0.07), transparent 75%), #ffffff;
}

/* 现场空间展示 (Showcase) */
.scene-image { 
  padding: 0; width: 100%; position: relative; background: #173247; text-align: left; overflow: hidden; border-radius: 18px; 
  box-shadow: 0 14px 44px rgba(23, 50, 71, 0.1);
}
.scene-image > img { width: 100%; height: 540px; object-fit: cover; object-position: 50% 52%; transition: transform 0.65s var(--ease-out-expo); }
.scene-image:hover > img { transform: scale(1.03); }
.scene-overlay { position: absolute; inset: 0; display: flex; align-items: flex-end; justify-content: space-between; padding: 36px 40px; background: linear-gradient(0deg, rgba(11, 37, 60, 0.88), transparent 55%); color: white; }
.scene-overlay small { font-size: 12px; letter-spacing: 1px; display: block; margin-bottom: 8px; color: #d2e2ec; font-weight: 600; }
.scene-overlay strong { font-size: 26px; font-weight: 550; }
.round-arrow { display: flex; align-items: center; justify-content: center; width: 50px; height: 50px; background: rgba(255, 255, 255, 0.15); border: 1px solid rgba(214, 225, 232, 0.45); border-radius: 50%; transition: all 0.2s; }
.scene-image:hover .round-arrow { background: #ffffff; color: var(--blue); transform: scale(1.08); }
.round-arrow .icon { width: 22px; height: 22px; }
.scene-footnote { display: flex; justify-content: space-between; gap: 24px; margin-top: 16px; font-size: 13px; color: #627887; }

/* 关于震界 (About) */
.about { background: #f5f8fb; }
.about-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 80px; align-items: center; }
.about h2 { font-size: 40px; line-height: 1.55; }
.about-wordmark { font-size: 52px; letter-spacing: 4px; color: #dce5ea; margin-top: 48px; line-height: 1.2; font-weight: 700; }
.about-wordmark span { display: block; font-size: 12px; color: #6e889b; letter-spacing: 7px; margin-top: 14px; font-weight: 600; }
.about-copy { padding-top: 5px; }
.about-lead { font-size: 24px; line-height: 1.7; margin-top: 20px; margin-bottom: 22px; font-weight: 550; color: #11283c; }
.about-copy > p:not(.about-lead) { font-size: 15.5px; color: var(--muted); margin-top: 16px; line-height: 1.95; }
.scope { margin-top: 26px; border-top: 1px solid #d8e3ec; border-bottom: 1px solid #d8e3ec; }
.scope summary { display: flex; align-items: center; justify-content: space-between; cursor: pointer; list-style: none; padding: 18px 0; font-size: 15px; color: #27658c; font-weight: 600; }
.scope summary::-webkit-details-marker { display: none; }
.scope summary .icon { width: 20px; height: 20px; transition: transform 0.25s var(--ease-spring); }
.scope[open] summary .icon { transform: rotate(45deg); }
.scope p { font-size: 14px; color: var(--muted); padding-bottom: 18px; line-height: 1.95; }

/* 联系我们 (Contact) */
.contact { background: #0e273a; color: white; position: relative; overflow: hidden; }
.contact::before { content: ""; position: absolute; right: -80px; top: -100px; width: 540px; height: 540px; border: 1px solid rgba(109, 164, 191, 0.08); border-radius: 50%; box-shadow: 0 0 0 90px rgba(109, 164, 191, 0.04), 0 0 0 180px rgba(109, 164, 191, 0.02); pointer-events: none; }
.contact-heading { display: flex; justify-content: space-between; align-items: center; gap: 30px; position: relative; }
.contact h2 { font-size: 40px; line-height: 1.5; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr 1.2fr 0.85fr; border-top: 1px solid rgba(255, 255, 255, 0.15); margin-top: 44px; padding-top: 32px; gap: 28px; position: relative; }
.contact-card { min-width: 0; }
.contact-icon { display: flex; align-items: center; justify-content: center; width: 42px; height: 42px; border: 1px solid rgba(255, 255, 255, 0.16); border-radius: 10px; background: rgba(255, 255, 255, 0.06); margin-bottom: 16px; color: #a3cce2; }
.contact-label { display: block; font-size: 12px; letter-spacing: 0.6px; color: #a9c4d6; margin-bottom: 8px; font-weight: 600; }
.contact-phone { font-size: 22px; font-weight: 700; white-space: nowrap; }
.contact-sub { font-size: 12.5px; color: #7f9eb2; margin-top: 6px; }
.contact-grid a, .contact-copy { font-size: 15.5px; transition: color 0.2s; }
.contact-grid a { display: inline-flex; align-items: center; gap: 8px; }
.contact-grid a:hover, .contact-copy:hover { color: #8ee2e6; }
.contact-copy { background: transparent; padding: 0; display: flex; align-items: center; gap: 10px; text-align: left; flex-wrap: wrap; overflow-wrap: anywhere; }
.copy-action { display: flex; align-items: center; gap: 5px; color: #b3d4e4; font-size: 13px; font-weight: 600; }
.copy-action:hover { color: #fff; }

/* 页脚 (Footer) */
.footer { padding: 36px 0 24px; background: #ffffff; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand .brand-symbol { width: 38px; height: 38px; }
.footer-brand strong { font-size: 22px; }
.footer-brand small { font-size: 9px; }
.footer-top > span { font-size: 14px; color: #60798b; }
.back-top { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--blue); font-weight: 600; transition: transform 0.2s; }
.back-top:hover { transform: translateY(-2px); }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 22px; margin-top: 26px; border-top: 1px solid var(--line); font-size: 12.5px; color: #637b8b; }

/* 模态弹窗 (Dialogs) */
dialog { padding: 0; border: none; border-radius: 18px; color: var(--ink); box-shadow: 0 25px 90px rgba(0, 24, 42, 0.45); }
dialog::backdrop { background: rgba(7, 31, 53, 0.72); backdrop-filter: blur(8px); }
.product-dialog { width: min(840px, calc(100% - 32px)); max-height: 90svh; overflow: hidden; }
.product-dialog[open] { display: flex; flex-direction: column; animation: dialogSlideUp 0.3s var(--ease-out-expo); }
@keyframes dialogSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.dialog-top { padding: 24px 30px 20px; display: flex; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); flex-shrink: 0; }
.dialog-top h2 { font-size: 26px; font-weight: 650; }
.close-dialog { display: flex; align-items: center; justify-content: center; height: 40px; width: 40px; background: #f0f4f7; border-radius: 50%; flex-shrink: 0; transition: background 0.2s, transform 0.2s; }
.close-dialog:hover { background: #dfeaf2; transform: rotate(90deg); }
.dialog-scroll { padding: 10px 30px 24px; overflow-y: auto; overscroll-behavior: contain; }
.dialog-product { width: 60%; margin: 10px auto 18px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; line-height: 1.8; }
.spec-table caption { text-align: left; font-weight: 650; padding: 10px 0; font-size: 17px; }
.spec-table th, .spec-table td { text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); padding: 11px 14px; }
.spec-table th { background: #f3f7fa; font-weight: 600; width: 28%; min-width: 110px; color: #2c4a63; }
.dialog-actions { padding: 18px 30px; background: #fff; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 15px; flex-shrink: 0; }
.button-blue { color: #fff; background: var(--blue); }
.button-blue:hover { background: var(--blue-hover); }
.button-outline { border: 1px solid #c7d5df; background: white; }
.button-outline:hover { background: #f7fafc; border-color: #9cb5c7; }
.image-dialog { background: #0e273a; color: white; width: min(1200px, calc(100% - 32px)); max-height: 92svh; }
.image-dialog > img { max-height: 80svh; width: 100%; object-fit: contain; }
.image-dialog > .close-dialog { position: absolute; right: 16px; top: 16px; color: var(--ink); }
.image-dialog > p { font-size: 13px; padding: 14px 20px; color: #c8dce8; }

/* 页面滚动进入微动效 (Scroll Reveal) */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-reveal) var(--ease-out-expo), transform var(--dur-reveal) var(--ease-out-expo);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 全局轻提示 Toast */
.toast { 
  position: fixed; 
  bottom: 28px; 
  left: 50%; 
  transform: translate(-50%, 20px); 
  opacity: 0; 
  padding: 12px 22px; 
  border-radius: 8px; 
  color: #fff; 
  background: #10324b; 
  box-shadow: 0 8px 32px rgba(10, 35, 55, 0.35); 
  z-index: 1000; 
  transition: all 0.25s var(--ease-spring); 
  pointer-events: none; 
  max-width: calc(100% - 32px); 
  font-size: 14.5px; 
  font-weight: 500;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
body.dialog-open { overflow: hidden; }

/* 响应式断点 */
@media (max-width: 1150px) {
  .container { width: calc(100% - 64px); }
  nav { gap: 20px; font-size: 14.5px; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .section { padding: 80px 0; }
  h2 { font-size: 33px; }
  .product-info { padding: 30px 26px; }
  .product-info h3 { font-size: 28px; }
  .feature-row { gap: 16px; }
  .business-grid { gap: 16px; }
  .about-grid { gap: 48px; }
  .contact-grid { grid-template-columns: 1fr 1fr; row-gap: 30px; }
}
@media (max-width: 760px) {
  .container { width: calc(100% - 36px); }
  .header { height: 76px; }
  .menu-toggle { 
    display: flex; flex-direction: column; justify-content: center; gap: 5px; 
    width: 40px; height: 40px; background: #f2f6f9; border-radius: 8px; padding: 10px; 
  }
  .menu-toggle span { display: block; width: 100%; height: 2px; background: var(--ink); transition: 0.2s; }
  nav {
    display: none;
    position: absolute; top: 76px; left: 0; right: 0;
    background: #ffffff; flex-direction: column; height: auto; padding: 20px 24px 28px;
    border-bottom: 1px solid var(--line); box-shadow: 0 16px 32px rgba(0,0,0,0.08);
  }
  nav.open { display: flex; }
  nav > a { height: 44px; width: 100%; }
  nav .nav-contact { width: 100%; justify-content: center; margin-top: 8px; }
  .hero { min-height: auto; padding-bottom: 60px; }
  .hero-content { padding-top: 50px; padding-bottom: 40px; }
  h1 { font-size: 34px; }
  .hero-metrics { grid-template-columns: 1fr; }
  .hero-caption, .scroll-cue { display: none; }
  .product-feature { grid-template-columns: 1fr; }
  .product-visual { min-height: 320px; }
  .feature-row { grid-template-columns: 1fr; }
  .business-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .sim-legend { flex-direction: column; gap: 8px; }
}

/* 动效辅助退化 (Reduced Motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  #scroll-progress {
    display: none !important;
  }
}