/* ===== 数智会务互动 - 全局样式 ===== */

:root {
  /* 品牌色 - 取自 logo 的蓝色渐变 */
  --brand-50: #eff6ff;
  --brand-100: #dbeafe;
  --brand-200: #bfdbfe;
  --brand-300: #93c5fd;
  --brand-400: #60a5fa;
  --brand-500: #3b82f6;
  --brand-600: #2563eb;
  --brand-700: #1d4ed8;
  --brand-800: #1e40af;
  --brand-900: #1e3a8a;
  --brand-950: #0f1e4d;

  /* 强调色 - 青蓝色（logo 中的光点色） */
  --accent-400: #22d3ee;
  --accent-500: #06b6d4;
  --accent-600: #0891b2;

  /* 中性色 */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --gray-950: #020617;

  /* 功能色 */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* 背景色 */
  --bg-white: #ffffff;
  --bg-cream: #f7f9fc;
  --bg-dark: #0a1628;

  /* 字体 */
  --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Noto Sans SC', 'Inter', sans-serif;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 1px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08), 0 4px 8px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.12), 0 8px 16px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;

  /* 间距 */
  --container-max: 1200px;
  --section-padding-y: 96px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  /* 全局防御：禁止竖排文字，确保横排正常显示 */
  writing-mode: horizontal-tb !important;
  text-orientation: mixed !important;
  direction: ltr !important;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--bg-white);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 容器 */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 段落 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--brand-600);
  letter-spacing: 0.02em;
  text-transform: none;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-500);
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.6);
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 16px;
  color: var(--gray-500);
  line-height: 1.7;
  margin-top: 16px;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--brand-700), var(--brand-800));
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: white;
  color: var(--gray-700);
  border-color: var(--gray-200);
}

.btn-secondary:hover {
  border-color: var(--brand-400);
  color: var(--brand-600);
  background: var(--brand-50);
}

.btn-ghost {
  color: var(--gray-600);
  background: transparent;
}

.btn-ghost:hover {
  color: var(--brand-600);
  background: var(--brand-50);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

/* 卡片 */
.card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-200);
  transform: translateY(-2px);
}

/* 滚动动画 */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* 渐变背景 */
.gradient-bg {
  background: linear-gradient(180deg, #f0f6ff 0%, #ffffff 100%);
}

.dark-gradient-bg {
  background: linear-gradient(180deg, var(--gray-900) 0%, var(--brand-950) 100%);
  color: white;
}

/* 装饰元素 */
.deco-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
}

.deco-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
  pointer-events: none;
}

/* 响应式 */
@media (max-width: 768px) {
  :root {
    --section-padding-y: 64px;
  }

  .section-header {
    margin-bottom: 40px;
  }
}

@media (max-width: 480px) {
  .btn-lg {
    padding: 14px 24px;
    font-size: 15px;
  }
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-400);
}