/* ============================================
   广汇龙电镀设备官网 - 样式表
   Industrial Precision Theme + Full Animations
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Core Colors */
  --bg-primary: #030014;
  --bg-alt: #0a0620;
  --bg-card: rgba(255,255,255,0.02);
  --text-primary: #FFFFFF;
  --text-secondary: #8C8C9A;
  --text-muted: #6B6B7B;
  --border-subtle: rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.12);

  /* Accent Palette */
  --accent-blue: #2EA7FF;
  --accent-teal: #13DDC4;
  --accent-purple: #9381FF;
  --accent-gold: #FFB454;

  /* Gradients */
  --grad-cta: linear-gradient(135deg, var(--accent-blue), var(--accent-teal));
  --grad-hero-glow-1: radial-gradient(circle at center, rgba(46,167,255,.25) 0%, transparent 70%);
  --grad-hero-glow-2: radial-gradient(circle at center, rgba(7,217,195,.20) 0%, transparent 70%);

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', '微软雅黑', 'Segoe UI', sans-serif;

  /* Layout */
  --container-width: 1280px;
  --header-height: 72px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 40px;
}

a { text-decoration: none; color: inherit; transition: color .3s ease; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; }
input, textarea { font-family: inherit; }

/* ---------- PARTICLE CANVAS BACKGROUND ---------- */
#particle-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---------- PRECISION LINES (SVG overlay) ---------- */
.precision-lines {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 720px;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}
.precision-lines svg {
  width: 100%; height: 100%;
}
.pline {
  stroke: rgba(46,167,255,.12);
  stroke-width: 1;
  stroke-dasharray: 800;
  stroke-dashoffset: 800;
  animation: pline-draw 3s ease-out forwards;
  animation-delay: .5s;
}
.pline-2 { animation-delay: 1.2s; }
.pline-3 { animation-delay: 1.9s; }
.pnode {
  fill: rgba(46,167,255,.4);
  opacity: 0;
  animation: pnode-fade .6s ease-out forwards;
}
.pnode-1 { animation-delay: 2.4s; }
.pnode-2 { animation-delay: 2.6s; }
.pnode-3 { animation-delay: 2.8s; }
.pnode-4 { animation-delay: 3.0s; }
.pnode-5 { animation-delay: 3.2s; }

@keyframes pline-draw {
  to { stroke-dashoffset: 0; }
}
@keyframes pnode-fade {
  to { opacity: 1; }
}

/* ---------- HEADER ---------- */
#header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(3,0,20,.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: all .35s ease;
}
#header.scrolled {
  box-shadow: 0 4px 30px rgba(0,0,0,.4);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-mark {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--grad-cta);
}
.logo-text {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.nav-links {
  display: flex;
  gap: 32px;
}
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color .25s ease;
}
.nav-link:hover,
.nav-link.active { color: var(--text-primary); }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0;
  width: 0; height: 2px;
  background: var(--accent-blue);
  border-radius: 1px;
  transition: width .3s ease;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.header-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  border-radius: 8px;
  background: var(--accent-blue);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all .3s ease;
}
.header-cta:hover {
  box-shadow: 0 8px 28px rgba(46,167,255,.35);
  transform: translateY(-1px);
}

/* ---------- HERO SECTION ---------- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--header-height) + 60px) 40px 80px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}
.hero-glow--top {
  top: -15%; left: -8%;
  width: 650px; height: 650px;
  background: radial-gradient(circle, rgba(46,167,255,.22) 0%, rgba(46,167,255,0) 65%);
  animation: glow-pulse 7s ease-in-out infinite alternate;
}
.hero-glow--bottom {
  bottom: -10%; right: -5%;
  width: 550px; height: 550px;
  background: radial-gradient(circle, rgba(7,217,195,.18) 0%, rgba(7,217,195,0) 65%);
  animation: glow-pulse 9s ease-in-out infinite alternate-reverse;
}

@keyframes glow-pulse {
  from { transform: scale(.95); opacity: .7; }
  to { transform: scale(1.08); opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 100px;
  background: rgba(46,167,255,.1);
  border: 1px solid rgba(46,167,255,.25);
  color: var(--accent-blue);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .05em;
  margin-bottom: 32px;
}

.hero-title {
  font-size: clamp(44px, 6vw, 80px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.03em;
  margin-bottom: 24px;
}
.hero-line {
  display: inline-block;
}
.hero-sub {
  font-size: clamp(16px, 1.6vw, 21px);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto 40px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero trust badges */
.hero-trust {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-top: 32px;
  flex-wrap: wrap;
}
.hero-trust-item {
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: .02em;
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 34px;
  border-radius: 10px;
  font-size: 17px;
  font-weight: 600;
  transition: all .35s cubic-bezier(.23,1,.32,1);
}
.btn--primary {
  background: var(--grad-cta);
  color: #fff;
  box-shadow: 0 8px 32px rgba(46,167,255,.28);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(46,167,255,.42);
}
.btn--secondary {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,.18);
}
.btn--secondary:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.3);
}
.btn--lg { padding: 18px 48px; font-size: 19px; }
.btn--block { width: 100%; }
.btn svg { transition: transform .3s ease; }
.btn:hover svg { transform: translateX(4px); }

/* Button glow pulse animation */
.btn--glow {
  position: relative;
  overflow: hidden;
}
.btn--glow::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
  transform: translateX(-100%);
  transition: none;
}
.btn--glow:hover::before {
  animation: btn-sweep .7s ease-in-out;
}
@keyframes btn-sweep {
  to { transform: translateX(100%); }
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  opacity: 0;
  animation: fade-up 1s ease-out 2.5s forwards;
}
.scroll-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,.4);
  animation: scroll-bounce 2.2s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(14px); opacity: .2; }
}
@keyframes fade-up {
  to { opacity: 1; }
}

/* ========== SECTION BASE ========== */
.section {
  position: relative;
  z-index: 2;
  padding: 110px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-label {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(32px, 3.5vw, 48px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.02em;
}
.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 12px auto 0;
}

/* ========== PRODUCTS ========== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.products-grid--4 {
  grid-template-columns: repeat(2, 1fr);
}

.product-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow: hidden;
  transition: all .45s cubic-bezier(.23,1,.32,1);
}
.product-card:hover {
  border-color: rgba(46,167,255,.2);
  background: rgba(255,255,255,.035);
  transform: translateY(-6px);
  box-shadow: 0 24px 56px rgba(0,0,0,.3), 0 0 0 1px rgba(46,167,255,.06);
}

.product-img-wrap { margin-bottom: 8px; }
.product-img {
  width: 100%;
  height: 220px;
  border-radius: 12px;
  background: linear-gradient(145deg, #0c1a33 0%, #050d1a 100%);
  border: 1px solid rgba(46,167,255,.12);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-img--2 {
  border-color: rgba(7,217,195,.12);
  background: linear-gradient(145deg, #0b2228 0%, #050f14 100%);
}
.product-img--3 {
  border-color: rgba(147,129,255,.12);
  background: linear-gradient(145deg, #160f2e 0%, #0a0518 100%);
}
.product-img--4 {
  border-color: rgba(255,180,84,.12);
  background: linear-gradient(145deg, #2a1e0a 0%, #14100a 100%);
}
.product-icon-placeholder {
  opacity: .7;
  transition: transform .45s ease, opacity .45s ease;
}
.product-card:hover .product-icon-placeholder {
  opacity: 1;
  transform: scale(1.08);
}

/* Card shimmer effect on hover */
.card-shimmer {
  position: absolute;
  inset: 0;
  border-radius: 20px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .4s ease;
  overflow: hidden;
}
.product-card:hover .card-shimmer { opacity: 1; }
.card-shimmer::after {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(46,167,255,.04) 48%,
    rgba(46,167,255,.09) 52%,
    transparent 60%
  );
  animation: shimmer-move 2.5s ease-in-out infinite;
}
@keyframes shimmer-move {
  to { transform: translateX(30%) translateY(10%); }
}

.product-num {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .25em;
  color: var(--accent-blue);
}
.product-num--cyan { color: var(--accent-teal); }
.product-num--purple { color: var(--accent-purple); }
.product-num--gold { color: var(--accent-gold); }
.product-name {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.product-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ========== ABOUT SECTION ========== */
.section--about {
  background: rgba(255,255,255,.018);
}

/* About intro */
.about-intro {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}
.about-intro-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 20px;
}
.about-intro-text .highlight {
  color: var(--accent-blue);
  font-weight: 600;
}

.about-intro-badge {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 36px;
  border-radius: 20px;
  background: rgba(255,255,255,.025);
  border: 1px solid var(--border-subtle);
}
.badge-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}
.badge-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.badge-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent-blue);
  line-height: 1;
}
.badge-item:nth-child(2) .badge-num { color: var(--accent-teal); }
.badge-item:nth-child(3) .badge-num { color: var(--accent-purple); }
.badge-suffix {
  font-size: 18px;
  font-weight: 600;
}
.badge-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto 80px;
  padding: 20px 0;
}
.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom,
    rgba(46,167,255,.3),
    rgba(7,217,195,.3),
    rgba(147,129,255,.3),
    rgba(255,180,84,.3)
  );
  transform: translateX(-50%);
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 24px 0;
  margin-bottom: 8px;
}
.timeline-item[data-side="left"] {
  left: 0;
  padding-right: 48px;
  text-align: right;
}
.timeline-item[data-side="right"] {
  left: 50%;
  padding-left: 48px;
}
.timeline-dot {
  position: absolute;
  top: 36px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(46,167,255,.15);
  z-index: 2;
}
.timeline-item[data-side="left"] .timeline-dot {
  right: -8px;
}
.timeline-item[data-side="right"] .timeline-dot {
  left: -8px;
}
.timeline-dot--teal { background: var(--accent-teal); box-shadow: 0 0 0 4px rgba(7,217,195,.15); }
.timeline-dot--purple { background: var(--accent-purple); box-shadow: 0 0 0 4px rgba(147,129,255,.15); }
.timeline-dot--gold { background: var(--accent-gold); box-shadow: 0 0 0 4px rgba(255,180,84,.15); }

.timeline-content {
  padding: 24px 28px;
  border-radius: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all .35s ease;
}
.timeline-content:hover {
  border-color: rgba(255,255,255,.14);
  background: rgba(255,255,255,.035);
}
.timeline-year {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--accent-blue);
  margin-bottom: 8px;
}
.timeline-dot--teal ~ .timeline-content .timeline-year,
.timeline-item[data-side="right"] .timeline-year { color: var(--accent-teal); }
.timeline-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}
.timeline-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Core values */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 36px 24px;
  text-align: center;
  transition: all .4s cubic-bezier(.23,1,.32,1);
}
.value-card:hover {
  border-color: rgba(255,255,255,.14);
  background: rgba(255,255,255,.035);
  transform: translateY(-5px);
  box-shadow: 0 20px 48px rgba(0,0,0,.25);
}
.value-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  transition: transform .35s ease;
}
.value-icon--blue { background: rgba(46,167,255,.1); color: var(--accent-blue); }
.value-icon--teal { background: rgba(7,217,195,.1); color: var(--accent-teal); }
.value-icon--purple { background: rgba(147,129,255,.1); color: var(--accent-purple); }
.value-icon--gold { background: rgba(255,180,84,.1); color: var(--accent-gold); }
.value-card:hover .value-icon { transform: scale(1.1) rotate(-5deg); }
.value-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.value-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ========== STATS ========== */
.section--stats {
  background: rgba(255,255,255,.018);
  padding: 90px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  text-align: center;
}
.stat-item {
  padding: 20px;
}
.stat-number {
  display: inline-block;
  font-size: clamp(40px, 4vw, 56px);
  font-weight: 800;
  color: var(--accent-blue);
  line-height: 1;
}
.stat-number--cyan { color: var(--accent-teal); }
.stat-number--purple { color: var(--accent-purple); }
.stat-number--gold { color: var(--accent-gold); }
.stat-suffix {
  font-size: clamp(36px, 3.5vw, 48px);
  font-weight: 800;
}
.stat-label {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ========== SOLUTIONS ========== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.sol-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 40px 28px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transition: all .4s cubic-bezier(.23,1,.32,1);
}
.sol-card:hover {
  border-color: rgba(255,255,255,.14);
  background: rgba(255,255,255,.035);
  transform: translateY(-5px);
  box-shadow: 0 20px 48px rgba(0,0,0,.25);
}
.sol-icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .35s ease;
}
.sol-card--blue .sol-icon { background: rgba(46,167,255,.1); }
.sol-card--teal .sol-icon { background: rgba(7,217,195,.1); }
.sol-card--purple .sol-icon { background: rgba(147,129,255,.1); }
.sol-card--gold .sol-icon { background: rgba(255,180,84,.1); }
.sol-card:hover .sol-icon { transform: scale(1.1) rotate(-5deg); }

.sol-title {
  font-size: 19px;
  font-weight: 700;
}
.sol-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ========== SERVICES ========== */
.section--services {
  background: rgba(255,255,255,.018);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.svc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all .4s cubic-bezier(.23,1,.32,1);
}
.svc-card:hover {
  border-color: rgba(46,167,255,.18);
  background: rgba(255,255,255,.035);
  transform: translateY(-4px);
  box-shadow: 0 16px 44px rgba(0,0,0,.25);
}
.svc-step {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--accent-blue);
}
.svc-step--teal { color: var(--accent-teal); }
.svc-step--purple { color: var(--accent-purple); }
.svc-title {
  font-size: 21px;
  font-weight: 700;
}
.svc-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.72;
}

/* ========== CONTACT ========== */
.section--contact {
  background: linear-gradient(170deg, var(--bg-primary) 0%, var(--bg-alt) 100%);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

/* Contact info */
.contact-info {
  padding: 40px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}
.contact-info-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 28px;
  line-height: 1.4;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}
.contact-info-icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.04);
}
.contact-info-label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.contact-info-value {
  display: block;
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
}
.contact-info-note {
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}
.contact-info-note p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Contact form */
.contact-form-wrap {
  padding: 40px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.form-input,
.form-textarea {
  padding: 14px 16px;
  border-radius: 10px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 15px;
  transition: all .25s ease;
  resize: vertical;
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}
.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: rgba(46,167,255,.4);
  background: rgba(46,167,255,.03);
  box-shadow: 0 0 0 3px rgba(46,167,255,.08);
}
.form-hint {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 4px;
}

/* ========== FOOTER ========== */
.footer {
  position: relative;
  z-index: 2;
  background: #04000e;
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 72px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 320px 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 48px;
}
.footer-logo {
  font-size: 26px;
  font-weight: 700;
  display: block;
  margin-bottom: 14px;
}
.footer-tagline {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.footer-contact-mini {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-contact-mini span {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-link {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color .25s ease, transform .25s ease;
}
.footer-link:hover {
  color: var(--accent-blue);
  transform: translateX(4px);
}
.footer-address {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 8px;
}
.footer-divider {
  height: 1px;
  background: rgba(255,255,255,.07);
  margin-bottom: 24px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}

/* ========================================
   REVEAL ANIMATIONS (scroll-triggered)
   注意：HTML 必须有 .js-ready class 才启动动画
   保证在国内网络环境下即使 JS/字体加载慢，文字也立即可见
   ======================================== */

/* 默认无动画时，文字直接可见（兜底） */
.reveal-up,
.card-reveal,
.stat-reveal,
.timeline-item {
  opacity: 1;
  transform: none;
}

/* JS 就绪后才切入动画模式 */
html.js-ready .reveal-up,
html.js-ready .card-reveal,
html.js-ready .stat-reveal,
html.js-ready .timeline-item {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity .7s cubic-bezier(.23,1,.32,1),
              transform .7s cubic-bezier(.23,1,.32,1);
}
html.js-ready .reveal-up.revealed,
html.js-ready .card-reveal.revealed,
html.js-ready .stat-reveal.revealed,
html.js-ready .timeline-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: .12s !important; }
.delay-2 { transition-delay: .24s !important; }
.delay-3 { transition-delay: .36s !important; }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .products-grid,
  .products-grid--4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .about-intro { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .container { padding: 0 28px; }
  .timeline { max-width: 100%; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 36px; }
  .hero-trust { gap: 16px; }
  .section { padding: 80px 0; }
  .solutions-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .product-card { padding: 32px; }
  .precision-lines { display: none; }

  /* Timeline responsive: switch to left-aligned single column */
  .timeline-line { left: 20px; }
  .timeline-item,
  .timeline-item[data-side="right"] {
    width: 100%;
    left: 0;
    padding-left: 56px;
    padding-right: 0;
    text-align: left;
  }
  .timeline-item[data-side="left"] {
    padding-right: 0;
    padding-left: 56px;
    text-align: left;
  }
  .timeline-item[data-side="left"] .timeline-dot,
  .timeline-item[data-side="right"] .timeline-dot {
    left: 12px;
    right: auto;
  }

  .contact-info,
  .contact-form-wrap { padding: 28px; }
}