/* ==========================================================================
   玲珑跨海协同生态 - 全局设计系统与视觉美学规范 (Common Design System)
   采用 Plus Jakarta Sans + JetBrains Mono 顶级现代科技字体体系与双风格微质感
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

:root {
  /* 字体栈 */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'HarmonyOS Sans', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, monospace;

  /* 白昼浅色 (Daylight Porcelain) */
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-solid: #ffffff;
  --bg-hover: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-subtle: rgba(226, 232, 240, 0.85);
  --border-focus: #0d9488;
  --brand-teal: #0d9488;
  --brand-teal-light: #2dd4bf;
  --brand-emerald: #059669;
  --shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 35px -5px rgba(13, 148, 136, 0.15);
}

.dark {
  /* 黑曜深色 (Obsidian Ocean) */
  --bg-page: #0b0f17;
  --bg-surface: #111827;
  --bg-card: rgba(17, 24, 39, 0.72);
  --bg-card-solid: #111827;
  --bg-hover: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: #14b8a6;
  --brand-teal: #14b8a6;
  --brand-teal-light: #5eead4;
  --brand-emerald: #10b981;
  --shadow-subtle: 0 4px 25px -2px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 45px -5px rgba(20, 184, 166, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
}

/* 标题类加精细字距 */
h1, h2, h3, h4, .font-heading {
  letter-spacing: -0.025em;
}

/* 精密数据与代码类 */
.font-mono, code, kbd, samp {
  font-family: var(--font-mono);
}

/* 顶级毛玻璃卡片 */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
}

.glass-nav {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.dark .glass-nav {
  background: rgba(11, 15, 23, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* 悬浮微升交互 */
.card-hover {
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.22s ease, border-color 0.22s ease;
}

.card-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  border-color: var(--border-focus);
}

/* 弥散环境光晕背景 */
.ambient-glow-teal {
  position: absolute;
  border-radius: 9999px;
  filter: blur(120px);
  pointer-events: none;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.18) 0%, rgba(20, 184, 166, 0) 70%);
}

.ambient-glow-emerald {
  position: absolute;
  border-radius: 9999px;
  filter: blur(140px);
  pointer-events: none;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(16, 185, 129, 0) 70%);
}

/* 自定义纤细精致滚动条 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.3);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(20, 184, 166, 0.5);
}

/* 莫比乌斯玉龙图腾轻柔呼吸光环 */
@keyframes pulse-glow {
  0%, 100% {
    filter: drop-shadow(0 0 10px rgba(20, 184, 166, 0.25));
    transform: scale(1);
  }
  50% {
    filter: drop-shadow(0 0 28px rgba(45, 212, 191, 0.65));
    transform: scale(1.02);
  }
}
.dragon-halo {
  animation: pulse-glow 4s ease-in-out infinite;
}

/* 按钮微光斜向扫过 (Shimmer Sweep) */
.shimmer-btn {
  position: relative;
  overflow: hidden;
}
.shimmer-btn::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent 30%, rgba(255, 255, 255, 0.3) 50%, transparent 70%);
  transform: rotate(25deg) translateX(-150%);
  transition: transform 0.75s ease;
}
.shimmer-btn:hover::after {
  transform: rotate(25deg) translateX(150%);
}

/* 极光流光边框卡片 */
.border-beam-card {
  position: relative;
}
.border-beam-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.6), transparent 50%, rgba(16, 185, 129, 0.5));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* 手风琴图标平滑旋转 */
.faq-icon {
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}