/* ============================================
   松丽卓越科技官网 - 全局深色科技主题样式
   设计基调：智慧安防 · 科技守护
   ============================================ */

/* ========== CSS变量系统 ========== */
:root {
  /* 主题色彩 */
  --color-bg: #050d1f;
  --color-bg-alt: #0d1b2a;
  --color-surface: #14233d;
  --color-surface-alt: #1f3553;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-overlay: rgba(15, 118, 255, 0.12);

  --color-primary: #1e88e5;
  --color-primary-dark: #1565c0;
  --color-secondary: #00acc1;
  --color-accent: #7cb342;
  --color-warning: #ffb300;
  --color-danger: #f4511e;

  --color-text: #e3f2fd;
  --color-text-muted: rgba(227, 242, 253, 0.65);
  --color-text-subtle: rgba(227, 242, 253, 0.45);

  /* 排版 */
  --font-family-base: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 26px;
  --font-size-3xl: 32px;
  --font-size-4xl: 40px;
  --font-size-5xl: 52px;

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 28px;
  --spacing-3xl: 40px;
  --spacing-4xl: 56px;
  --spacing-5xl: 72px;

  /* 圆角 & 阴影 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --radius-full: 999px;

  --shadow-soft: 0 18px 35px rgba(5, 13, 31, 0.55);
  --shadow-glow: 0 25px 65px rgba(30, 136, 229, 0.35);
  --shadow-inner: inset 0 0 0 1px rgba(255, 255, 255, 0.05);

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.55s ease;

  /* 容器宽度 */
  --container-max: 1240px;
}

/* ========== 重置与基础排版 ========== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  min-height: 100vh;
}

::selection {
  background: rgba(30, 136, 229, 0.35);
  color: #fff;
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

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

main {
  overflow: hidden;
}

/* ========== 容器与布局 ========== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-2xl);
}

.section {
  position: relative;
  padding: var(--spacing-5xl) 0;
}

.section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(0, 172, 193, 0.12), transparent 45%),
              radial-gradient(circle at 80% 0%, rgba(30, 136, 229, 0.18), transparent 35%);
  opacity: 0.5;
  pointer-events: none;
}

.section > * {
  position: relative;
}

.section-muted {
  background: linear-gradient(140deg, rgba(13, 27, 42, 0.8), rgba(8, 16, 30, 0.9));
}

.section-contrast {
  background: linear-gradient(135deg, rgba(30, 136, 229, 0.12), rgba(0, 172, 193, 0.08));
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
}

.section-title h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.02em;
}

.section-title p {
  margin: 0 auto;
  max-width: 640px;
  color: var(--color-text-muted);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-secondary);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.divider-line {
  width: 88px;
  height: 2px;
  margin: var(--spacing-2xl) auto 0;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

/* ========== 网格系统 ========== */
.grid {
  display: grid;
  gap: var(--spacing-2xl);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 1024px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

.flex {
  display: flex;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-col {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-2xl);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.25), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.btn-primary {
  background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(30, 136, 229, 0.15);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-3xl);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-xl);
  font-size: var(--font-size-sm);
}

/* ========== 卡片与面板 ========== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-base), border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(30, 136, 229, 0.4);
}

.glow-card {
  background: radial-gradient(circle at top, rgba(30, 136, 229, 0.15), transparent 65%), var(--color-surface-alt);
  border: 1px solid rgba(30, 136, 229, 0.35);
  box-shadow: var(--shadow-glow);
}

.panel {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
}

.data-card {
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(30, 136, 229, 0.15), rgba(0, 172, 193, 0.08));
  border: 1px solid var(--color-border);
}

.metric-value {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
}

.metric-label {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.stat-grid {
  display: grid;
  gap: var(--spacing-2xl);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.stat-card {
  background: var(--color-surface);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  background: rgba(30, 136, 229, 0.15);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  letter-spacing: 0.02em;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: rgba(30, 136, 229, 0.12);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

/* ========== 列表与标签 ========== */
ul, ol {
  margin: 0 0 var(--spacing-2xl);
  padding-left: var(--spacing-3xl);
}

li {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-muted);
}

.list-check {
  list-style: none;
  padding-left: 0;
}

.list-check li {
  position: relative;
  padding-left: var(--spacing-2xl);
}

.list-check li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-secondary);
  box-shadow: 0 0 12px rgba(0, 172, 193, 0.6);
}

.tag {
  display: inline-flex;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-right: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.tag.primary {
  border-color: rgba(30, 136, 229, 0.6);
  color: var(--color-text);
}

/* ========== 表格与数据 ========== */
table {
  width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

th,
td {
  text-align: left;
  padding: var(--spacing-lg) var(--spacing-2xl);
  border-bottom: 1px solid var(--color-border);
}

th {
  background: rgba(30, 136, 229, 0.15);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.data-bar {
  position: relative;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: var(--spacing-sm);
}

.data-bar span {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-primary));
}

/* ========== 图片与图文 ========== */
.img-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

blockquote {
  margin: var(--spacing-3xl) 0;
  padding: var(--spacing-2xl) var(--spacing-3xl);
  border-left: 3px solid var(--color-secondary);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-lg);
  color: var(--color-text);
}

/* ========== 表单 ========== */
form {
  display: grid;
  gap: var(--spacing-2xl);
}

.form-grid {
  display: grid;
  gap: var(--spacing-2xl);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

input,
textarea,
select {
  width: 100%;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--color-text);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 1px rgba(0, 172, 193, 0.5);
}

textarea {
  min-height: 160px;
  resize: vertical;
}

/* ========== 组件辅助 ========== */
.highlight {
  color: var(--color-secondary);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-accent {
  color: var(--color-accent);
}

.callout {
  background: rgba(124, 179, 66, 0.12);
  border: 1px solid rgba(124, 179, 66, 0.45);
  color: #d8ffb5;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
}

.text-center {
  text-align: center;
}

.mt-3 {
  margin-top: var(--spacing-xl);
}

.mt-4 {
  margin-top: var(--spacing-2xl);
}

.mt-5 {
  margin-top: var(--spacing-3xl);
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-2xl);
}

.chart-line {
  height: 90px;
  background: linear-gradient(180deg, rgba(30, 136, 229, 0.35), transparent);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
}

.chart-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.04),
    rgba(255, 255, 255, 0.04) 14px,
    transparent 14px,
    transparent 28px
  );
}

/* 进入视图动画 */
.card,
.feature-item,
.feature-tile,
.timeline-item,
.matrix-card,
.scene-card,
.case-card,
.download-card,
.stat-card,
.partner-tile,
.career-card,
.contact-card {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.animate-in {
  opacity: 1 !important;
  transform: translateY(0) !important;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  body {
    font-size: 15px;
  }

  .section {
    padding: var(--spacing-4xl) 0;
  }

  .section-title h2 {
    font-size: 28px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

  .section-title p {
    font-size: var(--font-size-sm);
  }

  .btn {
    width: 100%;
  }
}