/* =====================================
   洛阳大时代信息科技有限公司 - 企业官网
   主色：深蓝 #0A1A3A / 科技蓝 #1A6CFF / 青蓝光效 #00C8FF
   禁止紫色系
   ===================================== */

/* ===== CSS Variables ===== */
:root {
  --primary-dark: #0A1A3A;
  --primary: #1A6CFF;
  --primary-mid: #1455CC;
  --primary-light: #4A8BFF;
  --accent: #00C8FF;
  --accent-dim: rgba(0, 200, 255, 0.15);
  --bg-dark: #0A1628;
  --bg-section: #F0F5FB;
  --bg-card: #FFFFFF;
  --bg-footer: #081220;
  --text-primary: #0A1A3A;
  --text-body: #2C3E5A;
  --text-muted: #6B7F99;
  --text-white: #F0F5FB;
  --gray-border: #DCE4ED;
  --gray-light: #E8EEF6;
  --shadow-sm: 0 2px 12px rgba(10, 30, 60, 0.08);
  --shadow-md: 0 8px 32px rgba(10, 30, 60, 0.12);
  --shadow-lg: 0 16px 48px rgba(10, 30, 60, 0.16);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--bg-section);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--primary-light); }

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 96px 0;
}

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.7;
}

.text-center { text-align: center; }
.text-center .section-desc { margin-left: auto; margin-right: auto; }
.nowrap { white-space: nowrap; }

/* ===== Header / Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(10, 22, 40, 0.72);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transition: all var(--transition);
}

.site-header.scrolled {
  background: rgba(10, 22, 40, 0.85);
  box-shadow: 0 4px 28px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

/* Apple-style liquid glass highlight */
.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 20% 0%, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 60%);
  opacity: 0;
  animation: logoGlow 4s ease-in-out infinite;
}

@keyframes logoGlow {
  0%, 100% { opacity: 0; transform: translate(-30%, -30%); }
  50% { opacity: 1; transform: translate(10%, 10%); }
}

.logo-text {
  display: flex;
  flex-direction: column;
  white-space: nowrap;
}

/* ── 科技金属字效（钢铁侠 LOGO 风格灵感） ── */
.logo-text-main {
  font-size: 1.1rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.08em;

  /* 金红金属渐变 */
  background: linear-gradient(135deg,
    #c8961e 0%,
    #f5d060 22%,
    #e8b830 40%,
    #ff8c42 58%,
    #d42a1a 76%,
    #c8961e 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;

  /* 发光描边效果 */
  filter: drop-shadow(0 0 6px rgba(212, 160, 23, 0.35))
          drop-shadow(0 0 2px rgba(200, 150, 30, 0.5));

  /* 金属光泽流动 */
  animation: metalShine 5s ease-in-out infinite;
}

@keyframes metalShine {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.logo-text-sub {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

/* ===== Desktop Nav ===== */
.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
  border-radius: 1px;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-mid));
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  transition: all var(--transition);
}

.nav-cta::after { display: none; }
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 200, 255, 0.3);
  color: #fff !important;
}

/* ===== Mobile Menu Toggle ===== */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 0;
  background: linear-gradient(160deg, #0A1628 0%, #0E1E3C 30%, #132A50 60%, #0A1A3A 100%);
  overflow: hidden;
}

/* Hero Tech Background */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 108, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 108, 255, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
}

.hero-bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 200, 255, 0.12) 0%, transparent 70%);
  top: 20%;
  right: -10%;
  z-index: 1;
  animation: heroGlow 8s ease-in-out infinite alternate;
}

.hero-bg-glow-2 {
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(26, 108, 255, 0.08) 0%, transparent 70%);
  bottom: 0;
  left: 10%;
  z-index: 1;
  animation: heroGlow2 10s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); opacity: 0.6; }
  100% { transform: translate(-80px, 30px) scale(1.2); opacity: 1; }
}

@keyframes heroGlow2 {
  0% { transform: translate(0, 0) scale(1); opacity: 0.4; }
  100% { transform: translate(60px, -40px) scale(1.3); opacity: 0.8; }
}

.hero-lines {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
}

.hero-lines span {
  position: absolute;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, rgba(0, 200, 255, 0.1), transparent);
  animation: lineFloat 8s linear infinite;
}

.hero-lines span:nth-child(1) { left: 15%; animation-delay: 0s; }
.hero-lines span:nth-child(2) { left: 35%; animation-delay: 2s; }
.hero-lines span:nth-child(3) { left: 55%; animation-delay: 4s; }
.hero-lines span:nth-child(4) { left: 75%; animation-delay: 6s; }

@keyframes lineFloat {
  0% { transform: translateY(-100%); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateY(100%); opacity: 0; }
}

/* Floating data particles */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.3;
  animation: particleFloat 15s linear infinite;
}

.particle:nth-child(1) { top: 20%; left: 10%; animation-duration: 12s; }
.particle:nth-child(2) { top: 40%; left: 25%; animation-duration: 18s; animation-delay: 2s; }
.particle:nth-child(3) { top: 60%; left: 45%; animation-duration: 14s; animation-delay: 4s; }
.particle:nth-child(4) { top: 30%; left: 65%; animation-duration: 16s; animation-delay: 1s; }
.particle:nth-child(5) { top: 70%; left: 80%; animation-duration: 13s; animation-delay: 3s; }
.particle:nth-child(6) { top: 50%; left: 15%; animation-duration: 11s; animation-delay: 5s; }
.particle:nth-child(7) { top: 80%; left: 55%; animation-duration: 17s; animation-delay: 6s; }
.particle:nth-child(8) { top: 25%; left: 85%; animation-duration: 15s; animation-delay: 2.5s; }

@keyframes particleFloat {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  10% { opacity: 0.5; }
  90% { opacity: 0.5; }
  100% { transform: translateY(-300px) translateX(100px); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--header-height) 24px 0;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 200, 255, 0.1);
  border: 1px solid rgba(0, 200, 255, 0.2);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 24px;
  font-weight: 500;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 200, 255, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(0, 200, 255, 0); }
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 800px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: rgba(255, 255, 255, 0.7);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-mid));
  color: #fff;
  box-shadow: 0 4px 20px rgba(26, 108, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(26, 108, 255, 0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 200, 255, 0.08);
  transform: translateY(-2px);
}

.btn-outline .arrow {
  transition: transform var(--transition);
}

.btn-outline:hover .arrow {
  transform: translateX(4px);
}

.btn-phone {
  background: linear-gradient(135deg, #10B981, #059669);
  color: #fff;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

.btn-phone:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.4);
  color: #fff;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
}

.hero-stat-value .accent {
  color: var(--accent);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 2px;
}

/* ===== Services Section ===== */
#services {
  background: #fff;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.service-card {
  background: var(--bg-section);
  border-radius: var(--radius);
  padding: 36px 32px;
  border: 1px solid var(--gray-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent-dim), rgba(26, 108, 255, 0.08));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  position: relative;
}

.service-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.8;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.service-tag {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.service-card:hover .service-tag {
  gap: 8px;
}

/* ===== Tech Advantages ===== */
#advantages {
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

#advantages::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 108, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 108, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: 0;
}

#advantages .container {
  position: relative;
  z-index: 1;
}

#advantages .section-label { color: var(--accent); }
#advantages .section-title { color: #fff; }
#advantages .section-desc { color: rgba(255, 255, 255, 0.6); }

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.advantage-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--transition);
}

.advantage-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(0, 200, 255, 0.2);
  transform: translateY(-2px);
}

.advantage-icon {
  width: 44px;
  height: 44px;
  background: rgba(0, 200, 255, 0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.advantage-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.8;
}

.advantage-item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.advantage-item p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.6;
}

/* ===== Process Section ===== */
#process {
  background: #fff;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 32px 16px;
  margin-top: 48px;
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step-num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  margin: 0 auto 16px;
  position: relative;
  z-index: 2;
}

.process-step::after {
  content: '';
  position: absolute;
  top: 24px;
  left: calc(50% + 32px);
  right: calc(-50% + 32px);
  height: 2px;
  background: linear-gradient(90deg, var(--gray-border), transparent);
  z-index: 1;
}

.process-step:last-child::after { display: none; }

.process-step h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.process-step p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Cases Section ===== */
#cases {
  background: var(--bg-section);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.case-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-border);
  transition: all var(--transition);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.case-card-img {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-dark), var(--bg-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(26, 108, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 108, 255, 0.1) 1px, transparent 1px);
  background-size: 30px 30px;
}

.case-card-img-icon {
  position: relative;
  z-index: 1;
  width: 64px;
  height: 64px;
  background: rgba(0, 200, 255, 0.15);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-card-img-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.5;
}

.case-card-body {
  padding: 24px;
}

.case-card-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.case-card-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Contact Section ===== */
#contact {
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

#contact::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 200, 255, 0.06) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  z-index: 0;
}

#contact .container {
  position: relative;
  z-index: 1;
}

#contact .section-label { color: var(--accent); }
#contact .section-title { color: #fff; }
#contact .section-desc { color: rgba(255, 255, 255, 0.6); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 48px;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 200, 255, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.8;
}

.contact-item-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
}

.contact-item-value a {
  color: inherit;
}

.contact-item-value a:hover {
  color: var(--accent);
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-actions .btn {
  width: 100%;
  justify-content: center;
  padding: 16px 32px;
}

.contact-qr {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.contact-qr-placeholder {
  width: 140px;
  height: 140px;
  background: #fff;
  border-radius: 8px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.contact-qr-placeholder svg {
  width: 100px;
  height: 100px;
}

.contact-qr-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-size: 1rem;
}

.footer-brand .logo-text-main {
  /* 深色背景上增强发光 */
  filter: drop-shadow(0 0 10px rgba(212, 160, 23, 0.5))
          drop-shadow(0 0 4px rgba(200, 150, 30, 0.6))
          drop-shadow(0 0 1px rgba(255, 140, 66, 0.3));
}

.footer-brand .logo-text-sub {
  color: rgba(255, 255, 255, 0.4);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  margin-top: 16px;
  line-height: 1.7;
  max-width: 360px;
}

.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.35);
  margin-bottom: 8px;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition);
}

.footer-bottom a:hover {
  color: var(--accent);
}

.footer-seo {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.25);
  margin-top: 8px;
}

.footer-copy {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.35);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.35);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

/* ===== Scroll to Top ===== */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-mid));
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(26, 108, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(26, 108, 255, 0.4);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
  stroke-width: 2.5;
  fill: none;
}

/* ===== Mobile Phone Bar ===== */
.mobile-phone-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: #fff;
  border-top: 1px solid var(--gray-border);
  padding: 10px 16px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
}

.mobile-phone-bar a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-mid));
  color: #fff;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1.05rem;
}

.mobile-phone-bar a:hover {
  color: #fff;
}

/* ===== Animations ===== */
/* 反向策略：无 JS 时默认可见（内容可被抓取/无脚本也展示）；
   仅当 <html class="js"> 时，才隐藏元素并在进入视口时做入场动画 */
.js .fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.js .fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ===== Responsive ===== */

/* Tablet */
@media (max-width: 1024px) {
  .section-padding { padding: 72px 0; }
  .section-title { font-size: 2rem; }
  .services-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .process-step:nth-child(3)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-brand { grid-column: 1 / -1; }
}

/* Mobile */
@media (max-width: 768px) {
  :root { --header-height: 64px; }

  .section-padding { padding: 56px 0; }
  .section-title { font-size: 1.6rem; }
  .section-desc { font-size: 1rem; }

  /* Mobile Nav */
  .nav-list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 22, 40, 0.92);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: stretch;
    padding: 80px 24px 32px;
    gap: 4px;
    box-shadow: -4px 0 30px rgba(0, 0, 0, 0.3);
    transition: right 0.35s ease;
    z-index: 1000;
  }

  .nav-list.open {
    right: 0;
  }

  .nav-link {
    padding: 14px 12px;
    border-radius: 8px;
    font-size: 1rem;
  }

  .nav-link::after { display: none; }

  .nav-link:hover, .nav-link.active {
    background: rgba(0, 200, 255, 0.12);
  }

  .nav-cta {
    margin-top: 8px;
    text-align: center;
  }

  .menu-toggle { display: flex; }

  /* Mobile overlay */
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
  }

  .nav-overlay.open {
    opacity: 1;
    visibility: visible;
  }

  /* Hero */
  .hero { min-height: 90vh; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }

  /* Services */
  .services-grid { grid-template-columns: 1fr; }

  /* Advantages */
  .advantages-grid { grid-template-columns: 1fr; }

  /* Process */
  .process-steps {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .process-step::after { display: none; }

  /* Cases */
  .cases-grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { text-align: center; }
  .footer-bottom p { margin-bottom: 12px; }

  /* Mobile phone bar */
  .mobile-phone-bar { display: block; }
  body { padding-bottom: 72px; }

  .scroll-top {
    bottom: 88px;
    right: 16px;
    width: 44px;
    height: 44px;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; line-height: 1.25; }
  .hero-sub { font-size: 0.95rem; }
  .process-steps { grid-template-columns: 1fr; }
  .service-card { padding: 28px 20px; }
}

/* ===== Price Tag（服务卡片价格标签） ===== */
.price-tag {
  display: inline-block;
  background: linear-gradient(135deg, #FF6B35, #FF3D00);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 100px;
  vertical-align: middle;
  margin-left: 6px;
  letter-spacing: 0.02em;
}

.service-card-hot {
  border-color: rgba(255, 107, 53, 0.25) !important;
}

.service-card-hot::before {
  background: linear-gradient(90deg, #FF6B35, #FF3D00) !important;
  opacity: 1 !important;
}

.device-tag {
  margin-top: 10px;
  font-size: 0.92rem;
  color: var(--text-body);
  background: rgba(0, 200, 255, 0.08);
  padding: 8px 14px;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.device-tag strong {
  color: var(--primary);
}

/* Desktop: prevent wrapping on key phrases */
@media (min-width: 769px) {
  .hero-services-line,
  .hero-sub-highlight,
  .device-tag {
    white-space: nowrap;
  }
}

/* ===== Hero Price Display ===== */
.hero-price {
  display: block;
  margin-top: 6px;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: #fff;
}

.price-num {
  color: #FFD700;
  font-size: 1.3em;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

.hero-sub-highlight {
  display: inline-block;
  color: var(--accent);
  font-size: 1.15em;
  margin-bottom: 8px;
  background: rgba(0, 200, 255, 0.1);
  padding: 2px 14px;
  border-radius: 100px;
}

.hero-badge-hot .hero-badge-text {
  font-weight: 700;
  color: #FFD700;
}

.btn-pulse {
  animation: pulseCta 2s ease-in-out infinite;
}

@keyframes pulseCta {
  0%, 100% { box-shadow: 0 4px 20px rgba(26, 108, 255, 0.3); }
  50% { box-shadow: 0 4px 30px rgba(26, 108, 255, 0.6); }
}

/* ===== FAQ Section ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-section);
  border: 1px solid var(--gray-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  position: relative;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  padding: 0 24px 18px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== Bottom CTA Banner ===== */
.cta-banner {
  padding: 64px 0;
  background: linear-gradient(135deg, #0A1628, #132A50, #0A1A3A);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 200, 255, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(26, 108, 255, 0.08) 0%, transparent 50%);
  z-index: 0;
}

.cta-banner-inner {
  position: relative;
  z-index: 1;
}

.cta-banner-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.cta-banner-price {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: #FFD700;
  margin-bottom: 8px;
  text-shadow: 0 0 30px rgba(255, 215, 0, 0.3);
}

.cta-banner-price-num {
  font-size: 1.4em;
}

.cta-banner-desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.65);
}

/* ===== Mobile Responsive for new sections ===== */
@media (max-width: 768px) {
  .cta-banner { padding: 48px 24px; }
  .faq-item summary { padding: 14px 18px; font-size: 0.95rem; }
  .faq-item p { padding: 0 18px 14px; font-size: 0.9rem; }
  .device-tag { font-size: 0.85rem; padding: 6px 12px; }
}

/* ===== 无障碍：尊重 prefers-reduced-motion（移动端/敏感用户动画降级） ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}