/* ==========================================================================
   贝贝云 (beibeicloud.lat) - 核心样式表
   风格主题：Abyssal Black-Pearl & Biomineral Armor 深海贝珠生物装甲
   调色板：
     - True Abyssal Black: #05070b
     - Matte Dark-Aragonite Charcoal: #12151e
     - Bioluminescent Peacock-Cyan: #00f5d4
     - Deep Ocean-Indigo Reflections: #3b82f6 / #1d4ed8
     - 白天模式：高雅珍珠贝母白 (Oyster-Pearl White) 与深海琉璃渐变
   ========================================================================== */

:root {
  /* 白天模式 (默认打开)：雅致深海贝母与琉璃青白 */
  --bg-abyss: #f3f6fa;
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.92);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-armor: #e8eef5;
  --bg-telemetry: rgba(240, 245, 252, 0.85);

  --border-armor: #d8e2ed;
  --border-subtle: #e9eef5;
  --border-glow: rgba(0, 180, 216, 0.35);
  --border-glow-accent: rgba(59, 130, 246, 0.3);

  --text-primary: #0a1120;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --core-cyan: #00b4d8;
  --core-cyan-glow: rgba(0, 180, 216, 0.45);
  --core-indigo: #2563eb;
  --core-indigo-glow: rgba(37, 99, 235, 0.3);
  --peacock-gradient: linear-gradient(135deg, #0284c7 0%, #00b4d8 50%, #2563eb 100%);
  --text-gradient: linear-gradient(135deg, #0f172a 0%, #0284c7 60%, #2563eb 100%);

  --badge-bg: rgba(0, 180, 216, 0.08);
  --badge-text: #0284c7;
  --badge-border: rgba(0, 180, 216, 0.25);

  --accent-green: #10b981;
  --accent-green-bg: rgba(16, 185, 129, 0.1);
  --accent-amber: #f59e0b;

  --shadow-sm: 0 2px 8px rgba(10, 17, 32, 0.04);
  --shadow-md: 0 8px 30px rgba(10, 17, 32, 0.06);
  --shadow-lg: 0 16px 40px rgba(10, 17, 32, 0.08);
  --shadow-caustic: 0 20px 50px rgba(2, 132, 199, 0.15);

  --theme-toggle-bg: rgba(255, 255, 255, 0.85);
  --theme-toggle-border: rgba(203, 213, 225, 0.8);
  --theme-toggle-hover: #ffffff;
  --theme-toggle-color: #0f172a;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-hydraulic: all 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  /* 深海黑珍珠与生物装甲 (Abyssal Black-Pearl & Biomineral Armor) */
  --bg-abyss: #05070b;
  --bg-primary: #05070b;
  --bg-secondary: #0a0d14;
  --bg-card: rgba(18, 21, 30, 0.78);
  --bg-card-hover: rgba(24, 29, 42, 0.9);
  --bg-glass: rgba(10, 13, 20, 0.78);
  --bg-armor: #12151e;
  --bg-telemetry: rgba(18, 21, 30, 0.65);

  --border-armor: rgba(255, 255, 255, 0.09);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-glow: rgba(0, 245, 212, 0.35);
  --border-glow-accent: rgba(59, 130, 246, 0.4);

  --text-primary: #f0f6fc;
  --text-secondary: #94a3b8;
  --text-muted: #5c697e;
  --text-inverse: #05070b;

  --core-cyan: #00f5d4;
  --core-cyan-glow: rgba(0, 245, 212, 0.65);
  --core-indigo: #3b82f6;
  --core-indigo-glow: rgba(59, 130, 246, 0.5);
  --peacock-gradient: linear-gradient(135deg, #00f5d4 0%, #00b4d8 50%, #3b82f6 100%);
  --text-gradient: linear-gradient(135deg, #ffffff 0%, #00f5d4 60%, #3b82f6 100%);

  --badge-bg: rgba(0, 245, 212, 0.1);
  --badge-text: #00f5d4;
  --badge-border: rgba(0, 245, 212, 0.3);

  --accent-green: #00f5d4;
  --accent-green-bg: rgba(0, 245, 212, 0.12);
  --accent-amber: #f59e0b;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.75);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.85);
  --shadow-caustic: 0 0 40px rgba(0, 245, 212, 0.22), 0 0 80px rgba(59, 130, 246, 0.15);

  --theme-toggle-bg: rgba(18, 21, 30, 0.75);
  --theme-toggle-border: rgba(0, 245, 212, 0.25);
  --theme-toggle-hover: rgba(30, 36, 52, 0.9);
  --theme-toggle-color: #00f5d4;
}

/* ==========================================================================
   基础样式重置
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  transition: background-color 0.4s ease, color 0.4s ease;
}

/* 背景深海环境光与网格微纹理 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 50% 0%, rgba(0, 180, 216, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 85% 30%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 15% 70%, rgba(0, 245, 212, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
  transition: opacity 0.5s ease;
}

[data-theme="dark"] body::before {
  background: 
    radial-gradient(circle at 50% 0%, rgba(0, 245, 212, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 80% 35%, rgba(59, 130, 246, 0.09) 0%, transparent 55%),
    radial-gradient(circle at 20% 75%, rgba(0, 245, 212, 0.06) 0%, transparent 50%);
}

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

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

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

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   页眉导航 Header & Dynamic Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-armor);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  flex-shrink: 0;
}

/* 贝壳生物装甲 Logo 标志 */
.brand-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #12151e 0%, #05070b 100%);
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--core-cyan);
  box-shadow: 0 0 15px var(--core-cyan-glow);
  position: relative;
  overflow: hidden;
}

.brand-icon-box::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 12px;
  background: var(--peacock-gradient);
  opacity: 0.25;
  z-index: -1;
}

.brand-tag {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 3px 9px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

/* 包含首页及各个板块的完整导航 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 6px;
  transition: var(--transition-fast);
  white-space: nowrap;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--peacock-gradient);
  transition: width 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--core-cyan-glow);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 80%;
}

/* 新增的“推荐资讯”入口特别高亮光效 */
.nav-link-news {
  color: var(--core-indigo);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-link-news .pulse-tag {
  font-size: 0.65rem;
  background: var(--peacock-gradient);
  color: #05070b;
  font-weight: 800;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

/* 精致专业昼夜模式切换按钮 */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--theme-toggle-bg);
  border: 1px solid var(--theme-toggle-border);
  color: var(--theme-toggle-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  border-color: var(--core-cyan);
  box-shadow: 0 0 20px var(--core-cyan-glow);
  transform: translateY(-1px);
}

.theme-toggle-btn .icon-sun,
.theme-toggle-btn .icon-moon {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

/* 白天状态：太阳展现，月亮隐退 */
.theme-toggle-btn .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
.theme-toggle-btn .icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.4);
}

/* 夜间状态：月亮展现，太阳隐退 */
[data-theme="dark"] .theme-toggle-btn .icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.4);
}
[data-theme="dark"] .theme-toggle-btn .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-armor);
  padding: 9px;
}

.mobile-menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   按钮规范 (严格满足 CTA rel="nofollow" target="_blank")
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 11px 24px;
  border-radius: var(--radius-full);
  transition: var(--transition-smooth);
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background: var(--peacock-gradient);
  color: #05070b;
  box-shadow: 0 4px 18px var(--core-cyan-glow);
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--core-cyan-glow), 0 0 20px var(--core-indigo-glow);
  color: #05070b;
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-armor);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--core-cyan);
  color: var(--core-cyan);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
}

/* 装甲荧光微光晕 */
.btn-armor-glow {
  position: relative;
}
.btn-armor-glow::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: var(--peacock-gradient);
  z-index: -1;
  filter: blur(12px);
  opacity: 0.45;
  transition: var(--transition-smooth);
}
.btn-armor-glow:hover::after {
  opacity: 0.85;
  filter: blur(18px);
}

/* ==========================================================================
   主视觉区 (Hero: Armored-Shell Containment & Incandescent Core)
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 70px 0 50px;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 46px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  color: var(--badge-text);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 22px;
  box-shadow: 0 0 15px var(--core-cyan-glow);
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--core-cyan);
  box-shadow: 0 0 10px var(--core-cyan);
  animation: pulse-cyan 2s infinite ease-in-out;
}

@keyframes pulse-cyan {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* 大标题必须包含当前品牌名‘贝贝云’ */
.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -1.2px;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.hero-title .brand-highlight {
  background: var(--text-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  position: relative;
}

/* 主视觉区简介描述 */
.hero-intro {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 34px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   3D 贝壳生物装甲光核系统 (Armored-Shell Containment Unit)
   - 3D 多层暗矿贝壳装甲护罩
   - 内部炽热白绿孔雀青光核 (Bioluminescent Peacock-Cyan Optical Core)
   - 鼠标悬停液压机械微交互开启光波散焦 (Shell-Aperture Micro-Interaction)
   - 两侧烟熏琉璃遥测舱 (Smoked-Glass Telemetry Bays)
   -------------------------------------------------------------------------- */
.containment-stage {
  max-width: 1040px;
  margin: 50px auto 30px;
  position: relative;
  perspective: 1200px;
}

.containment-grid {
  display: grid;
  grid-template-columns: 280px 1fr 280px;
  gap: 24px;
  align-items: center;
}

/* 烟熏玻璃遥测舱 (Smoked-Glass Telemetry Bays) */
.telemetry-bay {
  background: var(--bg-telemetry);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-xl);
  padding: 26px 22px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.telemetry-bay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--peacock-gradient);
  opacity: 0.6;
}

.telemetry-bay:hover {
  border-color: var(--core-cyan);
  box-shadow: 0 0 30px var(--core-cyan-glow);
  transform: translateY(-4px);
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.telemetry-title {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--core-cyan);
  display: flex;
  align-items: center;
  gap: 6px;
}

.telemetry-status-led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--core-cyan);
  box-shadow: 0 0 8px var(--core-cyan);
}

.telemetry-stat-value {
  font-size: 1.85rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1.1;
  font-feature-settings: "tnum";
}

.telemetry-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
  margin-bottom: 16px;
}

.telemetry-metrics-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.telemetry-metrics-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.telemetry-metrics-list .val {
  font-weight: 700;
  color: var(--text-primary);
  font-family: monospace;
}

/* ==========================================================================
   中央 3D 贝壳生物装甲光核主舱 (Exquisite Biomineral Shell & Pearl Assembly)
   ========================================================================== */
.shell-assembly {
  height: 380px;
  background: radial-gradient(circle at 50% 50%, #0d121d 0%, #070910 65%, #030408 100%);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 245, 212, 0.12), inset 0 0 30px rgba(0, 0, 0, 0.8);
  perspective: 1200px;
  transition: var(--transition-hydraulic);
}

[data-theme="light"] .shell-assembly {
  background: radial-gradient(circle at 50% 50%, #ffffff 0%, #edf3f8 65%, #dce6f0 100%);
  border-color: #cbd5e1;
  box-shadow: var(--shadow-lg), 0 10px 30px rgba(0, 180, 216, 0.12);
}

/* 底层机箱微网格与工程十字定位标 */
.chassis-grid-bg {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(rgba(0, 245, 212, 0.07) 1px, transparent 1px),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 20px 20px, 40px 40px, 40px 40px;
  pointer-events: none;
  z-index: 1;
}

[data-theme="light"] .chassis-grid-bg {
  background-image: 
    radial-gradient(rgba(0, 180, 216, 0.1) 1px, transparent 1px);
}

.chassis-marker {
  position: absolute;
  font-family: monospace;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.8px;
  opacity: 0.6;
  z-index: 2;
  pointer-events: none;
  user-select: none;
}

.marker-tl { top: 12px; left: 16px; }
.marker-tr { top: 12px; right: 16px; }
.marker-bl { bottom: 12px; left: 16px; }
.marker-br { bottom: 12px; right: 16px; }

/* 4 角液压阻尼活塞机构 (Hydraulic Damper Pistons) */
.hydraulic-piston {
  position: absolute;
  z-index: 3;
  width: 44px;
  height: 10px;
  display: flex;
  align-items: center;
  pointer-events: none;
  transition: var(--transition-hydraulic);
}

.piston-cylinder {
  width: 24px;
  height: 10px;
  background: linear-gradient(180deg, #334155 0%, #1e293b 50%, #0f172a 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.3), 0 2px 5px rgba(0, 0, 0, 0.5);
}

.piston-rod {
  width: 20px;
  height: 5px;
  background: linear-gradient(180deg, #f1f5f9 0%, #94a3b8 50%, #64748b 100%);
  border-radius: 2px;
  box-shadow: 0 0 4px rgba(0, 245, 212, 0.4);
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.piston-tl { top: 22px; left: 24px; }
.piston-bl { bottom: 22px; left: 24px; }
.piston-tr { top: 22px; right: 24px; flex-direction: row-reverse; }
.piston-br { bottom: 22px; right: 24px; flex-direction: row-reverse; }

/* 开壳时液压杆伸长微动效 */
.shell-assembly:hover .piston-tl .piston-rod,
.shell-assembly.opened .piston-tl .piston-rod,
.shell-assembly:hover .piston-bl .piston-rod,
.shell-assembly.opened .piston-bl .piston-rod {
  transform: translateX(-10px);
}

.shell-assembly:hover .piston-tr .piston-rod,
.shell-assembly.opened .piston-tr .piston-rod,
.shell-assembly:hover .piston-br .piston-rod,
.shell-assembly.opened .piston-br .piston-rod {
  transform: translateX(10px);
}

/* 内部光焦散与多层散射 */
.light-caustics-layer {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at center, rgba(0, 245, 212, 0.22) 0%, transparent 60%),
    conic-gradient(from 0deg at 50% 50%, transparent 0deg, rgba(0, 245, 212, 0.16) 45deg, transparent 90deg, rgba(59, 130, 246, 0.16) 180deg, transparent 270deg, rgba(0, 245, 212, 0.16) 360deg);
  opacity: 0.4;
  mix-blend-mode: screen;
  animation: caustics-rotate 20s linear infinite;
  pointer-events: none;
  z-index: 2;
  transition: opacity 0.6s ease;
}

@keyframes caustics-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.energy-field-ring {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px solid rgba(0, 245, 212, 0.2);
  box-shadow: 0 0 40px rgba(0, 245, 212, 0.15), inset 0 0 40px rgba(59, 130, 246, 0.15);
  pointer-events: none;
  z-index: 2;
  animation: field-pulse 4s ease-in-out infinite alternate;
}

@keyframes field-pulse {
  0% { transform: scale(0.96); opacity: 0.6; }
  100% { transform: scale(1.04); opacity: 0.9; }
}

/* ==========================================================================
   炽热黑珍珠光核与旋转 HUD 瞄准准星环 (Pearl Core & Cyber HUD)
   ========================================================================== */
.pearl-core-wrap {
  position: absolute;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 旋转外层 HUD 刻度环 */
.hud-optic-ring.ring-outer {
  position: absolute;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  border: 1px dashed rgba(0, 245, 212, 0.45);
  box-shadow: 0 0 15px rgba(0, 245, 212, 0.2);
  animation: hud-spin-cw 26s linear infinite;
  pointer-events: none;
}

/* 旋转中层 HUD 弧段环 */
.hud-optic-ring.ring-mid {
  position: absolute;
  width: 154px;
  height: 154px;
  border-radius: 50%;
  border: 1.5px solid rgba(59, 130, 246, 0.35);
  border-top-color: #00f5d4;
  border-bottom-color: #00f5d4;
  animation: hud-spin-ccw 14s linear infinite;
  pointer-events: none;
}

/* 中心准星十字线 */
.hud-reticle {
  position: absolute;
  width: 135px;
  height: 135px;
  border-radius: 50%;
  border: 1px solid rgba(0, 245, 212, 0.25);
  pointer-events: none;
}
.hud-reticle::before, .hud-reticle::after {
  content: '';
  position: absolute;
  background: rgba(0, 245, 212, 0.6);
}
.hud-reticle::before {
  top: 50%;
  left: -8px;
  right: -8px;
  height: 1px;
  transform: translateY(-50%);
}
.hud-reticle::after {
  left: 50%;
  top: -8px;
  bottom: -8px;
  width: 1px;
  transform: translateX(-50%);
}

@keyframes hud-spin-cw {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes hud-spin-ccw {
  from { transform: rotate(0deg); }
  to { transform: rotate(-360deg); }
}

/* 3D 珠光黑珍珠核心实体 (Black-Pearl Sphere) */
.black-pearl-sphere {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ffffff 0%, #c8faf2 8%, #00f5d4 25%, #0284c7 52%, #0f172a 78%, #030508 100%);
  box-shadow: 
    0 0 35px var(--core-cyan),
    0 0 70px var(--core-cyan-glow),
    0 0 110px rgba(59, 130, 246, 0.5),
    inset -8px -8px 20px rgba(0, 0, 0, 0.8),
    inset 4px 4px 10px rgba(255, 255, 255, 0.6);
  position: relative;
  z-index: 4;
  animation: pearl-float 4s ease-in-out infinite alternate;
}

@keyframes pearl-float {
  0% { transform: translateY(-3px) scale(0.98); }
  100% { transform: translateY(3px) scale(1.02); }
}

.pearl-specular {
  position: absolute;
  top: 18px;
  left: 24px;
  width: 22px;
  height: 14px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  filter: blur(1.5px);
  transform: rotate(-35deg);
}

.pearl-inner-glow {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(0, 245, 212, 0.4) 0%, transparent 65%);
  animation: inner-pulse 2s ease-in-out infinite alternate;
}

@keyframes inner-pulse {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

/* ==========================================================================
   高精度生物装甲甲片 (Left & Right Contoured Biomineral Carapace)
   ========================================================================== */
.shell-plate {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 53%;
  z-index: 5;
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.65s ease;
  overflow: visible;
  pointer-events: none;
}

.armor-plate-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.shell-plate-left {
  left: 0;
  transform-origin: left center;
}

.shell-plate-right {
  right: 0;
  transform-origin: right center;
}

/* ==========================================================================
   开壳微交互：带液压阻尼感的机械外壳开启与光核散焦
   ========================================================================== */
.shell-assembly:hover .shell-plate-left,
.shell-assembly.opened .shell-plate-left {
  transform: translateX(-85px) rotateY(16deg);
}

.shell-assembly:hover .shell-plate-right,
.shell-assembly.opened .shell-plate-right {
  transform: translateX(85px) rotateY(-16deg);
}

.shell-assembly:hover .light-caustics-layer,
.shell-assembly.opened .light-caustics-layer {
  opacity: 0.9;
}

.shell-assembly:hover .pearl-core-wrap,
.shell-assembly.opened .pearl-core-wrap {
  transform: scale(1.15);
}

.shell-assembly:hover .black-pearl-sphere,
.shell-assembly.opened .black-pearl-sphere {
  box-shadow: 
    0 0 50px var(--core-cyan),
    0 0 100px var(--core-cyan-glow),
    0 0 150px rgba(59, 130, 246, 0.7),
    inset -8px -8px 20px rgba(0, 0, 0, 0.8),
    inset 4px 4px 12px rgba(255, 255, 255, 0.9);
}

/* 动态指示标签 */
.shell-interactive-hint {
  position: absolute;
  bottom: 18px;
  z-index: 8;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: var(--core-cyan);
  background: rgba(10, 14, 22, 0.85);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
}

.shell-interactive-hint .hint-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--core-cyan);
  box-shadow: 0 0 10px var(--core-cyan);
  animation: pulse-cyan 1.6s infinite ease-in-out;
}

.shell-assembly:hover .shell-interactive-hint,
.shell-assembly.opened .shell-interactive-hint {
  border-color: var(--core-cyan);
  box-shadow: 0 0 20px var(--core-cyan-glow);
}

/* 白天珍珠贝母模式下的装甲甲片柔和高雅色彩映射 */
html:not([data-theme="dark"]) .armor-stop-1 { stop-color: #ffffff; }
html:not([data-theme="dark"]) .armor-stop-2 { stop-color: #e4ecf4; }
html:not([data-theme="dark"]) .armor-stop-3 { stop-color: #cfdce9; }
html:not([data-theme="dark"]) .armor-stop-4 { stop-color: #b0c2d4; }
html:not([data-theme="dark"]) .shell-plate path[stroke="rgba(255,255,255,0.12)"] { stroke: rgba(0, 180, 216, 0.4) !important; }
html:not([data-theme="dark"]) .shell-plate path[stroke="rgba(255,255,255,0.06)"] { stroke: rgba(0, 100, 180, 0.12) !important; }
html:not([data-theme="dark"]) .shell-interactive-hint {
  background: rgba(255, 255, 255, 0.92);
  color: #0284c7;
  border-color: rgba(0, 180, 216, 0.4);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   遥测舱加密与延迟动态示波器 (Telemetry Sparklines & Waveforms)
   ========================================================================== */
.telemetry-waveform-wrap {
  height: 38px;
  margin: 10px 0 14px;
  position: relative;
  overflow: hidden;
  background: rgba(5, 7, 11, 0.4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-armor);
  padding: 2px 4px;
  display: flex;
  align-items: center;
}

[data-theme="light"] .telemetry-waveform-wrap {
  background: rgba(255, 255, 255, 0.6);
}

.telemetry-waveform {
  width: 100%;
  height: 100%;
  display: block;
}

.wave-path {
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
}

.wave-path-1 {
  stroke: var(--core-cyan);
  stroke-dasharray: 6 3;
  animation: wave-flow 4s linear infinite;
  filter: drop-shadow(0 0 4px var(--core-cyan));
}

.wave-path-2 {
  stroke: rgba(59, 130, 246, 0.6);
  stroke-dasharray: 4 4;
  animation: wave-flow-reverse 6s linear infinite;
}

.wave-path-ping {
  stroke: var(--core-cyan);
  stroke-width: 2;
  filter: drop-shadow(0 0 5px var(--core-cyan));
  stroke-dasharray: 230;
  stroke-dashoffset: 230;
  animation: ping-pulse-run 3s ease-in-out infinite;
}

@keyframes wave-flow {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -100; }
}
@keyframes wave-flow-reverse {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: 100; }
}
@keyframes ping-pulse-run {
  0% { stroke-dashoffset: 230; opacity: 0.3; }
  50% { stroke-dashoffset: 0; opacity: 1; }
  100% { stroke-dashoffset: -230; opacity: 0.3; }
}

/* ==========================================================================
   通用板块规范与锚点过渡
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
  /* 解决固定顶部导航遮挡锚点标题 */
  scroll-margin-top: 85px;
}

.section-alt {
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--core-cyan);
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.6px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   产品核心优势介绍 (3个图文卡片)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-xl);
  padding: 38px 30px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--peacock-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg), 0 0 25px rgba(0, 245, 212, 0.12);
}

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

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-lg);
  background: var(--badge-bg);
  color: var(--core-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid var(--badge-border);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
  flex-grow: 1;
}

.feature-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--border-armor);
}

.feature-bullets li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.feature-bullets li svg {
  color: var(--core-cyan);
  flex-shrink: 0;
}

/* ==========================================================================
   流媒体图卡 & AI 支持图卡 (Showcase Cards)
   ========================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 34px;
}

.showcase-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-xl);
  padding: 42px 36px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.showcase-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 245, 212, 0.15);
}

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  width: fit-content;
  margin-bottom: 20px;
}

.showcase-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.showcase-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
}

.service-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.service-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: var(--radius-md);
  background: var(--bg-armor);
  border: 1px solid var(--border-armor);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.service-pill:hover {
  border-color: var(--core-cyan);
  color: var(--core-cyan);
  transform: translateY(-2px);
}

.service-pill svg {
  width: 18px;
  height: 18px;
}

.showcase-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 22px;
  border-top: 1px solid var(--border-armor);
  margin-top: auto;
}

.showcase-highlights li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.93rem;
  color: var(--text-secondary);
}

.showcase-highlights li svg {
  color: var(--core-cyan);
  flex-shrink: 0;
  margin-top: 4px;
}

/* ==========================================================================
   套餐价格对比表 (参考网上真实套餐价格)
   - 月付体验 ¥18.8/月
   - 季付主力 ¥52/季 (约¥17.3/月)
   - 年付旗舰 ¥188/年 (约¥15.6/月)
   - 商业团队定制 ¥468/年 (大流量多设备)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-xl);
  padding: 34px 26px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--core-cyan);
  box-shadow: var(--shadow-lg), 0 0 35px var(--core-cyan-glow);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--peacock-gradient);
  color: #05070b;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px var(--core-cyan-glow);
  white-space: nowrap;
}

.pricing-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-armor);
  margin-bottom: 24px;
}

.pricing-plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-top: 14px;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--core-cyan);
}

.price-amount {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
  font-feature-settings: "tnum";
}

.price-period {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.price-monthly-equiv {
  font-size: 0.78rem;
  color: var(--core-cyan);
  font-weight: 700;
  margin-top: 4px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.pricing-features li svg {
  flex-shrink: 0;
  color: var(--core-cyan);
}

.pricing-btn {
  width: 100%;
}

/* ==========================================================================
   用户口碑评价 (Testimonials)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.review-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
  font-size: 1rem;
}

.review-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--border-armor);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--peacock-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #05070b;
  font-size: 1rem;
  box-shadow: 0 0 12px var(--core-cyan-glow);
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-primary);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题解答 FAQ
   ========================================================================== */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.faq-item:hover {
  border-color: var(--border-glow);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.faq-question:hover {
  color: var(--core-cyan);
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--core-cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-item.active .faq-answer {
  max-height: 380px;
}

.faq-answer-inner {
  padding: 0 26px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px dashed var(--border-armor);
  margin-top: 4px;
  padding-top: 18px;
}

/* ==========================================================================
   页脚 Footer (严格遵循规范：只保留4个标题，打开新页面)
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-armor);
  padding: 46px 0 38px;
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  list-style: none;
}

.footer-link {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  border: 1px solid transparent;
}

.footer-link:hover {
  color: var(--core-cyan);
  border-color: var(--border-glow);
  background-color: var(--bg-armor);
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   资讯列表与内容页专属样式 (推荐资讯 insights-v8n2.html)
   ========================================================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 50px;
}

.news-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-xl);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
}

.news-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.news-tag {
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.news-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
  line-height: 1.4;
}

.news-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.news-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--core-cyan);
  font-size: 0.9rem;
}

.news-readmore:hover {
  gap: 10px;
}

/* ==========================================================================
   深度 SEO 长文专栏专属样式 (Article, TOC, Tables, FAQ, Related)
   ========================================================================== */
.article-container {
  max-width: 900px;
  margin: 36px auto 70px;
  padding: 0 24px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.article-breadcrumb a:hover {
  color: var(--core-cyan);
}

.article-breadcrumb .sep {
  opacity: 0.5;
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--border-armor);
}

.article-title {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.6px;
  color: var(--text-primary);
  margin: 14px 0 16px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 文章目录 (Table of Contents) */
.article-toc {
  background: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-left: 4px solid var(--core-cyan);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 28px 0 40px;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-link {
  font-size: 0.93rem;
  color: var(--text-secondary);
  font-weight: 500;
  display: inline-block;
  transition: var(--transition-fast);
}

.toc-link:hover {
  color: var(--core-cyan);
  transform: translateX(4px);
}

/* 正文排版 */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 48px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
  scroll-margin-top: 90px;
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px;
  scroll-margin-top: 90px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body strong {
  color: var(--text-primary);
}

.article-body a.inline-link {
  color: var(--core-cyan);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a.inline-link:hover {
  color: var(--core-indigo);
}

/* 响应式技术对比表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-armor);
  box-shadow: var(--shadow-sm);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background: var(--bg-card);
}

.article-table th {
  background: var(--bg-armor);
  color: var(--text-primary);
  font-weight: 800;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-armor);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

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

.article-table tr:hover td {
  background: var(--bg-armor);
}

/* 重点提示框 */
.article-callout {
  background: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-left: 4px solid var(--core-indigo);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 28px 0;
}

.article-callout.tip {
  border-left-color: var(--core-cyan);
}

.article-callout.warning {
  border-left-color: #f59e0b;
}

/* 文章内置专属行动区 */
.article-cta-box {
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.12) 0%, rgba(59, 130, 246, 0.12) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  padding: 38px 32px;
  text-align: center;
  margin: 50px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.article-cta-box h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.article-cta-box p {
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 24px;
  font-size: 0.98rem;
}

/* 文章 FAQ 板块 */
.article-faq-section {
  margin: 50px 0;
  padding-top: 36px;
  border-top: 1px solid var(--border-armor);
}

.article-faq-section h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
}

/* 相关阅读板块 (Related Articles) */
.related-articles-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--border-armor);
}

.related-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-armor);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

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

.related-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 10px;
  flex-grow: 1;
}

.related-card .tag {
  font-size: 0.75rem;
  color: var(--core-cyan);
  font-weight: 700;
  margin-bottom: 8px;
}

.related-card .read-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--core-cyan);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
}

@media (max-width: 860px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   响应式媒体查询 @media
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-title {
    font-size: 2.85rem;
  }
  .containment-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .telemetry-bay {
    max-width: 500px;
    margin: 0 auto;
    width: 100%;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
}

@media (max-width: 768px) {
  .nav-container {
    height: 64px;
  }
  .brand-logo {
    font-size: 1.2rem;
  }
  .brand-tag {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-armor);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 24px 24px;
    box-shadow: var(--shadow-lg);
    display: none;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-link {
    padding: 14px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--border-armor);
  }

  .nav-actions .btn-header-cta {
    display: none;
  }

  .hero-section {
    padding: 42px 0 32px;
  }

  .hero-title {
    font-size: 2.15rem;
  }

  .hero-intro {
    font-size: 1rem;
    margin-bottom: 26px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
  }

  .shell-assembly {
    height: 300px;
  }

  .pearl-core-wrap {
    transform: scale(0.8);
  }

  .shell-assembly:hover .shell-plate-left,
  .shell-assembly.opened .shell-plate-left {
    transform: translateX(-55px) rotateY(12deg);
  }

  .shell-assembly:hover .shell-plate-right,
  .shell-assembly.opened .shell-plate-right {
    transform: translateX(55px) rotateY(-12deg);
  }

  .features-grid,
  .showcase-grid,
  .pricing-grid,
  .reviews-grid,
  .news-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card,
  .showcase-card,
  .pricing-card,
  .review-card,
  .news-card {
    padding: 26px 20px;
  }

  .pricing-btn {
    min-height: 48px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 14px;
    width: 100%;
  }

  .footer-link {
    display: block;
    width: 100%;
    padding: 12px;
    background: var(--bg-card);
  }
}