/* ========================================
   西安欣创电子技术有限公司官网
   基础样式 (LCARS主题 Reset & Base Styles)
   ======================================== */

/* ===== 全局重置 ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-background-dark);
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-dark);
  background: radial-gradient(circle at 20% 20%, rgba(94, 209, 255, 0.18), transparent 55%),
              radial-gradient(circle at 80% 10%, rgba(255, 156, 84, 0.12), transparent 60%),
              radial-gradient(circle at 80% 70%, rgba(184, 140, 255, 0.18), transparent 55%),
              var(--color-background-dark);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(4, 7, 18, 0.6) 0%, rgba(4, 7, 18, 0.1) 45%, rgba(4, 7, 18, 0.6) 100%);
  mix-blend-mode: screen;
  z-index: -1;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-sm);
}

svg {
  width: 100%;
  height: auto;
}

/* ===== 标题样式 ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-light);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

/* ===== 段落和文本 ===== */
p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
  letter-spacing: 0.01em;
}

strong {
  color: var(--color-text-light);
}

a {
  color: var(--color-highlight);
  text-decoration: none;
  transition: color var(--transition-base), text-shadow var(--transition-base);
}

a:hover {
  color: var(--color-tertiary);
  text-shadow: 0 0 12px rgba(94, 209, 255, 0.5);
}

code, pre {
  font-family: var(--font-family-mono);
  background: rgba(16, 23, 51, 0.8);
  border-radius: var(--border-radius-sm);
}

pre {
  padding: var(--spacing-md);
  overflow-x: auto;
}

/* ===== 列表 ===== */
ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

li {
  margin-bottom: var(--spacing-sm);
}

/* ===== 容器和布局 ===== */
.container {
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--grid-container-padding);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--grid-container-padding);
}

section {
  position: relative;
  padding: var(--spacing-3xl) 0;
}

main {
  position: relative;
  z-index: 1;
}

/* ===== 通用栅格 ===== */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ===== LCARS 面板 ===== */
.lcars-panel {
  background: linear-gradient(145deg, rgba(16, 23, 51, 0.92), rgba(4, 7, 18, 0.7));
  border-radius: var(--border-radius-lcars) var(--border-radius-base) var(--border-radius-base) var(--border-radius-lcars);
  border: var(--border-width) solid rgba(94, 209, 255, 0.2);
  padding: var(--spacing-2xl);
  position: relative;
  overflow: hidden;
  box-shadow: var(--box-shadow-sm);
}

.lcars-panel::after {
  content: "";
  position: absolute;
  inset: -40% 50% 40% -40%;
  background: linear-gradient(90deg, rgba(94, 209, 255, 0) 0%, rgba(94, 209, 255, 0.12) 35%, rgba(94, 209, 255, 0) 70%);
  animation: panel-scan 6s linear infinite;
  pointer-events: none;
  mix-blend-mode: screen;
}

.section-title {
  position: relative;
  text-align: left;
  font-size: var(--font-size-3xl);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
  padding-left: calc(var(--spacing-lg) + 12px);
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, rgba(255, 156, 84, 0.8), rgba(94, 209, 255, 0.8));
  border-radius: var(--border-radius-full);
  box-shadow: 0 0 12px rgba(94, 209, 255, 0.5);
}

.section-title::after {
  content: attr(data-code);
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  font-size: var(--font-size-xs);
  letter-spacing: 0.28em;
  color: rgba(94, 209, 255, 0.4);
}

@keyframes panel-scan {
  from { transform: translateX(-120%) rotate(12deg); }
  to   { transform: translateX(120%) rotate(12deg); }
}

.lcars-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.lcars-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-full);
  background: rgba(94, 209, 255, 0.2);
  border: 1px solid rgba(94, 209, 255, 0.35);
  font-size: var(--font-size-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* ===== 按钮样式 ===== */
.btn,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-xl);
  font-family: var(--font-family-display);
  font-size: var(--font-size-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  border-radius: var(--border-radius-full);
  background: rgba(94, 209, 255, 0.18);
  color: var(--color-text-light);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn::after,
button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(255, 156, 84, 0) 0%, rgba(255, 156, 84, 0.45) 50%, rgba(255, 156, 84, 0) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after,
button:hover::after {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, rgba(255, 156, 84, 0.85), rgba(255, 111, 140, 0.85));
  box-shadow: 0 0 20px rgba(255, 156, 84, 0.35);
}

.btn-highlight {
  background: linear-gradient(135deg, rgba(94, 209, 255, 0.9), rgba(94, 209, 255, 0.6));
  box-shadow: 0 0 25px rgba(94, 209, 255, 0.45);
  color: var(--color-background-dark);
}

.btn-outline {
  background: transparent;
  border: var(--border-width) solid rgba(94, 209, 255, 0.5);
  color: var(--color-text-light);
}

.btn-outline:hover {
  background: rgba(94, 209, 255, 0.12);
}

.btn-block {
  width: 100%;
}

.btn:disabled,
button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

/* ===== 表单元素 ===== */
input, textarea, select {
  width: 100%;
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-base);
  border: var(--border-width) solid rgba(94, 209, 255, 0.28);
  background: rgba(10, 15, 31, 0.7);
  color: var(--color-text-light);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-highlight);
  box-shadow: 0 0 0 3px rgba(94, 209, 255, 0.25);
}

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-muted { color: var(--color-text-muted); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: rgba(184, 140, 255, 0.2);
  border: 1px solid rgba(184, 140, 255, 0.35);
  color: var(--color-text-light);
}

.highlight {
  color: var(--color-highlight);
}

.border-accent {
  border-left: 4px solid var(--color-highlight);
  padding-left: var(--spacing-md);
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 32px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(94, 209, 255, 0.9), rgba(184, 140, 255, 0.9));
  color: var(--color-background-dark);
  font-size: var(--font-size-lg);
  border: none;
  box-shadow: var(--box-shadow-base);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition-base);
  z-index: var(--z-index-fixed);
}

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

@keyframes scan-pulse {
  0%, 100% { opacity: 0.2; transform: scaleX(0.6); }
  50% { opacity: 1; transform: scaleX(1); }
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: rgba(16, 23, 51, 0.6);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(255, 156, 84, 0.75), rgba(94, 209, 255, 0.75));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(255, 111, 140, 0.85), rgba(94, 209, 255, 0.95));
}

/* ===== 响应式调整 ===== */
@media (max-width: 991px) {
  body {
    background-position: center;
  }

  section {
    padding: var(--spacing-2xl) 0;
  }

  .lcars-panel {
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
  }

  .section-title {
    text-align: center;
    padding-left: 0;
  }

  .section-title::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .section-title::after {
    display: none;
  }

}

@media (max-width: 575px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }

  .btn,
  button {
    letter-spacing: 0.08em;
    padding: var(--spacing-sm) var(--spacing-lg);
  }
}