/* ===================================================================
   dove加速器 (dovejiasu.best) - 超音速隐形战机 & 马赫锥极速原生设计系统
   UI Theme: Nocturnal stealth-glider & supersonic Mach-cone dark UI
   Palette: OLED Void (#04060a), Moonlight Silver (#f8fafc),
            Mach-Cyan (#00f2fe), Twilight Indigo (#1e3a8a)
   =================================================================== */

/* --- 1. 全局设计系统与 CSS 变量 --- */
:root {
  /* 白天模式 (高空平流层极速白金) */
  --bg-void: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-elevated: #e2e8f0;
  
  --border-stealth: rgba(14, 165, 233, 0.2);
  --border-stealth-hover: rgba(0, 242, 254, 0.7);
  --border-card: #e2e8f0;
  
  --text-main: #071126;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --mach-cyan: #0284c7;
  --mach-cyan-bright: #00c6ff;
  --mach-cyan-glow: rgba(2, 132, 199, 0.2);
  --twilight-indigo: #1e3a8a;
  --moonlight-silver: #071126;
  
  --primary-gradient: linear-gradient(135deg, #0284c7 0%, #00f2fe 100%);
  --stealth-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(241, 245, 249, 0.7) 100%);
  --cta-pill-bg: linear-gradient(135deg, #0284c7 0%, #00f2fe 100%);
  --cta-pill-color: #ffffff;
  --cta-pill-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.35);
  --cta-pill-hover-shadow: 0 15px 35px -5px rgba(0, 242, 254, 0.55);
  
  --header-bg: rgba(255, 255, 255, 0.88);
  --theme-btn-bg: rgba(2, 132, 199, 0.08);
  --theme-btn-border: rgba(2, 132, 199, 0.25);
  --telemetry-bg: #e2e8f0;
  --telemetry-border: #cbd5e1;
  --telemetry-text: #0369a1;
  
  --card-shadow: 0 8px 24px -4px rgba(15, 23, 42, 0.08);
  --card-shadow-hover: 0 16px 36px -6px rgba(2, 132, 199, 0.18);
  --shockwave-color: rgba(2, 132, 199, 0.15);
}

[data-theme="dark"], :root:not([data-theme="light"]) {
  /* 夜间模式 (深渊高度 OLED 纯黑与超音速马赫电光蓝) */
  --bg-void: #04060a;
  --bg-surface: #080c14;
  --bg-card: #0b111e;
  --bg-card-hover: #101a2c;
  --bg-elevated: #131e33;
  
  --border-stealth: rgba(0, 242, 254, 0.15);
  --border-stealth-hover: rgba(0, 242, 254, 0.55);
  --border-card: rgba(255, 255, 255, 0.07);
  
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #04060a;
  
  --mach-cyan: #00f2fe;
  --mach-cyan-bright: #38bdf8;
  --mach-cyan-glow: rgba(0, 242, 254, 0.35);
  --twilight-indigo: #1e3a8a;
  --moonlight-silver: #f8fafc;
  
  --primary-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #1e3a8a 100%);
  --stealth-gradient: linear-gradient(180deg, rgba(16, 26, 44, 0.8) 0%, rgba(8, 12, 20, 0.95) 100%);
  --cta-pill-bg: linear-gradient(135deg, #00f2fe 0%, #38bdf8 60%, #1e3a8a 100%);
  --cta-pill-color: #04060a;
  --cta-pill-shadow: 0 0 25px rgba(0, 242, 254, 0.4), 0 8px 20px -5px rgba(0, 0, 0, 0.8);
  --cta-pill-hover-shadow: 0 0 40px rgba(0, 242, 254, 0.7), 0 12px 28px -5px rgba(0, 242, 254, 0.5);
  
  --header-bg: rgba(4, 6, 10, 0.85);
  --theme-btn-bg: rgba(0, 242, 254, 0.06);
  --theme-btn-border: rgba(0, 242, 254, 0.22);
  --telemetry-bg: rgba(0, 242, 254, 0.05);
  --telemetry-border: rgba(0, 242, 254, 0.18);
  --telemetry-text: #00f2fe;
  
  --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.7);
  --card-shadow-hover: 0 18px 45px -5px rgba(0, 0, 0, 0.85), 0 0 25px rgba(0, 242, 254, 0.15);
  --shockwave-color: rgba(0, 242, 254, 0.18);
}

/* 强制白天模式特定类覆盖 */
[data-theme="light"] {
  --bg-void: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-elevated: #e2e8f0;
  
  --border-stealth: rgba(2, 132, 199, 0.2);
  --border-stealth-hover: rgba(0, 180, 216, 0.6);
  --border-card: #e2e8f0;
  
  --text-main: #071126;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --mach-cyan: #0284c7;
  --mach-cyan-bright: #0284c7;
  --mach-cyan-glow: rgba(2, 132, 199, 0.15);
  --twilight-indigo: #1e3a8a;
  --moonlight-silver: #071126;
  
  --primary-gradient: linear-gradient(135deg, #0284c7 0%, #00b4d8 100%);
  --stealth-gradient: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  --cta-pill-bg: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  --cta-pill-color: #ffffff;
  --cta-pill-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.35);
  --cta-pill-hover-shadow: 0 15px 35px -5px rgba(2, 132, 199, 0.5);
  
  --header-bg: rgba(255, 255, 255, 0.9);
  --theme-btn-bg: rgba(2, 132, 199, 0.08);
  --theme-btn-border: #cbd5e1;
  --telemetry-bg: #eff6ff;
  --telemetry-border: #bfdbfe;
  --telemetry-text: #0284c7;
  
  --card-shadow: 0 6px 20px -2px rgba(15, 23, 42, 0.06);
  --card-shadow-hover: 0 16px 32px -4px rgba(2, 132, 199, 0.15);
  --shockwave-color: rgba(2, 132, 199, 0.15);
}

/* --- 2. 基础重置与超音速排版 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px; /* 锚点跳转平滑偏移 */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-void);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), color 0.35s ease;
  position: relative;
}

/* 背景隐形网格微纹理 */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(to right, var(--border-stealth) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-stealth) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.25;
  pointer-events: none;
  z-index: -2;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

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

/* 等宽航电电报字体 */
.font-mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* 马赫电光文字 */
.mach-text {
  color: var(--mach-cyan);
  text-shadow: 0 0 15px var(--mach-cyan-glow);
}

.gradient-title {
  background: linear-gradient(135deg, var(--moonlight-silver) 30%, var(--mach-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* --- 3. 顶部超音速导航栏 (Header) --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 76px;
  background-color: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-stealth);
  z-index: 1000;
  transition: all 0.35s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}

/* 官方品牌徽标 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-mark {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform 0.3s ease;
}

.brand-logo:hover .brand-logo-mark {
  transform: scale(1.08) rotate(-3deg);
}

.dove-brand-icon {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.25);
}

.brand-logo-text {
  display: flex;
  align-items: baseline;
  gap: 4px;
  line-height: 1;
}

.brand-name-en {
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: 1.2px;
  color: var(--text-main);
}

.brand-name-zh {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--mach-cyan);
}

/* 导航目录 (包含首页、所有板块与推荐资讯) */
.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 550;
  color: var(--text-secondary);
  padding: 6px 4px;
  position: relative;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--mach-cyan);
  box-shadow: 0 0 8px var(--mach-cyan);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  transform: translateX(-50%);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* 推荐资讯高亮入口徽章 */
.nav-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--mach-cyan);
  font-weight: 600;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-stealth);
  border-radius: 9999px;
  padding: 4px 12px;
}

.nav-badge-pill:hover {
  background: rgba(0, 242, 254, 0.16);
  border-color: var(--mach-cyan);
  box-shadow: 0 0 12px var(--mach-cyan-glow);
}

.pulse-spark {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mach-cyan);
  box-shadow: 0 0 8px var(--mach-cyan);
  animation: pulse-glow 1.8s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}

/* 导航右侧操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

/* 精致半透明航电昼夜切换钮 */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--theme-btn-bg);
  border: 1px solid var(--theme-btn-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-main);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  transform: translateY(-2px);
  border-color: var(--mach-cyan);
  box-shadow: 0 0 15px var(--mach-cyan-glow);
  color: var(--mach-cyan);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.sun-icon { display: none; }
.moon-icon { display: block; }
[data-theme="light"] .sun-icon { display: block; }
[data-theme="light"] .moon-icon { display: none; }

/* 航电级光芒发光 CTA 药丸按钮 (Luminous Cyan-White CTA Pill) */
.cta-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 24px;
  border-radius: 9999px;
  font-size: 0.95rem;
  font-weight: 750;
  letter-spacing: 0.5px;
  color: var(--cta-pill-color);
  background: var(--cta-pill-bg);
  box-shadow: var(--cta-pill-shadow);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.cta-pill::before {
  content: "";
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.6s ease;
}

.cta-pill:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--cta-pill-hover-shadow);
}

.cta-pill:hover::before {
  left: 100%;
}

.cta-pill-lg {
  padding: 15px 38px;
  font-size: 1.12rem;
}

.btn-stealth {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 9999px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  background: var(--bg-surface);
  border: 1px solid var(--border-stealth);
  box-shadow: var(--card-shadow);
  transition: all 0.25s ease;
}

.btn-stealth:hover {
  border-color: var(--mach-cyan);
  color: var(--mach-cyan);
  transform: translateY(-2px);
  box-shadow: 0 0 20px var(--mach-cyan-glow);
}

.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  border: 1px solid var(--border-stealth);
}

/* --- 4. 超音速主视觉区 (Supersonic Delta-Wing Hero) --- */
.hero-section {
  padding-top: 140px;
  padding-bottom: 90px;
  position: relative;
  overflow: hidden;
}

.hero-ambient-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 550px;
  background: radial-gradient(ellipse at center, rgba(0, 242, 254, 0.12) 0%, rgba(30, 58, 138, 0.15) 45%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

/* 左侧英雄内容指令区 (Left Hero Command) */
.hero-badge-aerospace {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 9999px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-stealth);
  color: var(--mach-cyan);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  margin-bottom: 22px;
}

.hero-headline {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -1.2px;
  margin-bottom: 18px;
  color: var(--text-main);
}

.hero-subheadline {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--mach-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
  max-width: 580px;
}

/* 航电遥测数据控制面板 (Monospace Telemetry Panel) */
.telemetry-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 12px 20px;
  background: var(--telemetry-bg);
  border: 1px solid var(--telemetry-border);
  border-radius: 12px;
  font-size: 0.82rem;
  color: var(--telemetry-text);
  margin-bottom: 32px;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

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

.telemetry-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 右侧战机马赫锥视觉画板 (Right Canvas: Delta-Wing & Concentric Mach Rings) */
.hero-visual-canvas {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mach-rings-container {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

/* 同心马赫激波圆环 (Concentric Mach Shockwave Rings) */
.mach-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--shockwave-color);
  animation: mach-expand 4s infinite cubic-bezier(0.1, 0.8, 0.3, 1);
}

.mach-ring:nth-child(1) { width: 140px; height: 140px; animation-delay: 0s; }
.mach-ring:nth-child(2) { width: 240px; height: 240px; animation-delay: 1s; }
.mach-ring:nth-child(3) { width: 340px; height: 340px; animation-delay: 2s; }
.mach-ring:nth-child(4) { width: 440px; height: 440px; animation-delay: 3s; }

@keyframes mach-expand {
  0% { transform: scale(0.6) rotate(0deg); opacity: 0.8; }
  50% { opacity: 0.4; border-color: rgba(0, 242, 254, 0.4); }
  100% { transform: scale(1.35) rotate(15deg); opacity: 0; }
}

/* 隐形三角翼机甲主体 (Dark Titanium Delta-Wing Silhouette) */
.delta-wing-model {
  width: 280px;
  height: 280px;
  z-index: 2;
  filter: drop-shadow(0 0 35px rgba(0, 242, 254, 0.35));
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.delta-wing-model:hover {
  transform: translateY(-8px) scale(1.05);
}

/* --- 5. 通用区块样式 --- */
.section {
  padding: 96px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-stealth);
  border-bottom: 1px solid var(--border-stealth);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 9999px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-stealth);
  color: var(--mach-cyan);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 850;
  letter-spacing: -0.6px;
  margin-bottom: 14px;
  color: var(--text-main);
}

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

/* --- 6. 核心产品优势 (3个图文卡片) --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.stealth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  padding: 38px 30px;
  box-shadow: var(--card-shadow);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.stealth-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--mach-cyan), transparent);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.stealth-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-stealth-hover);
  box-shadow: var(--card-shadow-hover);
}

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

.stealth-icon-box {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-stealth);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mach-cyan);
  margin-bottom: 24px;
  transition: all 0.3s ease;
}

.stealth-card:hover .stealth-icon-box {
  background: var(--mach-cyan);
  color: #04060a;
  box-shadow: 0 0 20px var(--mach-cyan);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 750;
  margin-bottom: 12px;
  color: var(--text-main);
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.card-specs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid var(--border-card);
  padding-top: 18px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.card-specs-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-specs-list svg {
  width: 16px;
  height: 16px;
  color: var(--mach-cyan);
  flex-shrink: 0;
}

/* --- 7. 全球服务器节点与光子脉冲微交互 (Regional Server Cards) --- */
.servers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.server-node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 22px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.server-node-card::after {
  content: "";
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 242, 254, 0.15), transparent);
  transition: left 0.4s ease;
}

.server-node-card:hover {
  transform: translateY(-4px);
  border-color: var(--mach-cyan);
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.25);
}

.server-node-card:hover::after {
  left: 100%;
}

.node-flag-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-region {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-ping-pill {
  font-size: 0.78rem;
  font-weight: 700;
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 6px;
  padding: 3px 8px;
  font-family: ui-monospace, monospace;
}

.node-detail-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- 8. 流媒体与 AI 支持图卡 (Showcase Cards) --- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 24px;
  padding: 40px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all 0.35s ease;
}

.showcase-box:hover {
  transform: translateY(-6px);
  border-color: var(--border-stealth-hover);
  box-shadow: var(--card-shadow-hover);
}

.showcase-badge {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 750;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
  text-transform: uppercase;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-stealth);
  color: var(--mach-cyan);
}

.showcase-h3 {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.showcase-p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 26px;
}

.service-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.service-pill-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all 0.25s ease;
}

.service-pill-item:hover {
  border-color: var(--mach-cyan);
  transform: translateY(-2px);
  box-shadow: 0 0 12px var(--mach-cyan-glow);
}

.telemetry-metrics-bar {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-card);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.metric-card {
  background: var(--bg-surface);
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid var(--border-card);
}

.metric-card-lbl {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.metric-card-val {
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--mach-cyan);
}

/* --- 9. 真实价格对比表 (Realistic Pricing Matrix) --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 24px;
  padding: 40px 32px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--card-shadow-hover);
}

.pricing-card.featured {
  border: 2px solid var(--mach-cyan);
  transform: scale(1.03);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.25);
  background: linear-gradient(180deg, var(--bg-card) 0%, rgba(0, 242, 254, 0.04) 100%);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.featured-flag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cta-pill-bg);
  color: #04060a;
  padding: 4px 18px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.6);
}

.plan-tier-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-tier-intro {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.plan-price-block {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-card);
}

.price-currency {
  font-size: 1.6rem;
  font-weight: 750;
  color: var(--text-main);
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
}

.price-unit {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-items-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-items-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.plan-items-list li svg {
  width: 17px;
  height: 17px;
  color: var(--mach-cyan);
  flex-shrink: 0;
}

/* --- 10. 用户评价 (Testimonials) --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-stealth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  padding: 30px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease;
}

.review-stealth-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-stealth);
}

.stars-rating {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 16px;
}

.stars-rating svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.review-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.reviewer-box {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-pic {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid var(--border-stealth);
  color: var(--mach-cyan);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.reviewer-details {
  display: flex;
  flex-direction: column;
}

.reviewer-handle {
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--text-main);
}

.reviewer-occupation {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- 11. 常见问题解答 (FAQ) --- */
.faq-box-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-card:hover {
  border-color: var(--border-stealth);
}

.faq-header-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text-main);
  cursor: pointer;
  background: none;
  border: none;
}

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
}

.faq-card.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--mach-cyan);
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-card.active .faq-body {
  max-height: 250px;
  padding-bottom: 22px;
}

/* --- 12. 底部转化条 --- */
.cta-banner-section {
  padding: 80px 0;
}

.cta-banner-box {
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.7) 0%, rgba(4, 6, 10, 0.9) 100%);
  border: 1px solid var(--border-stealth);
  border-radius: 28px;
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 50px rgba(0, 242, 254, 0.15);
}

.cta-banner-box::before {
  content: "";
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: 2.3rem;
  font-weight: 850;
  margin-bottom: 14px;
  color: #ffffff;
}

.cta-banner-p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin: 0 auto 32px auto;
}

/* --- 13. 页脚规范 (Footer) --- */
/* 用户指令要求：“页脚需要有网站地图，关于我们，服务条款，隐私政策。页脚只保留这四个标题，内容打开新的页面展示。” */
.site-footer {
  background-color: var(--bg-void);
  border-top: 1px solid var(--border-stealth);
  padding: 50px 0 35px 0;
  transition: background-color 0.35s ease;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  list-style: none;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav-item a {
  font-size: 1rem;
  font-weight: 650;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.footer-nav-item a:hover {
  color: var(--mach-cyan);
}

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

/* --- 14. 推荐资讯子页面专用样式 --- */
.news-header-box {
  padding-top: 130px;
  padding-bottom: 50px;
  text-align: center;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-stealth);
}

.news-articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 40px;
  margin-bottom: 80px;
}

.article-card-stealth {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 18px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.article-card-stealth:hover {
  transform: translateY(-5px);
  border-color: var(--border-stealth-hover);
  box-shadow: var(--card-shadow-hover);
}

.article-tag {
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--mach-cyan);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-stealth);
  margin-bottom: 14px;
}

.article-title {
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

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

.article-footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-card);
  padding-top: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* --- 15. 响应式适配 (@media 媒体查询) --- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 36px;
  }
  
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-subheadline {
    justify-content: center;
  }
  
  .telemetry-strip {
    justify-content: center;
  }
  
  .hero-cta-group {
    justify-content: center;
  }
  
  .servers-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .news-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }
  
  .site-header {
    height: 68px;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0; right: 0;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-stealth);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    transform: translateY(-130%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  
  .nav-link {
    font-size: 1.05rem;
    width: 100%;
    padding: 10px 0;
  }
  
  .nav-actions .cta-pill {
    display: none;
  }
  
  .hero-headline {
    font-size: 2.3rem;
  }
  
  .hero-subheadline {
    font-size: 1.15rem;
  }
  
  .features-grid,
  .servers-grid,
  .showcase-grid,
  .pricing-grid,
  .reviews-grid,
  .news-articles-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .showcase-box {
    padding: 26px 20px;
  }
  
  .telemetry-metrics-bar {
    grid-template-columns: 1fr;
  }
  
  .cta-banner-box {
    padding: 40px 20px;
  }
  
  .cta-banner-title {
    font-size: 1.8rem;
  }
  
  .footer-nav-list {
    flex-direction: column;
    gap: 16px;
  }
}

/* --- 16. 长篇深度 SEO 科普文章专用样式 --- */
.article-detail-wrap {
  padding-top: 130px;
  padding-bottom: 90px;
}

.article-hero-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-stealth);
  padding-bottom: 30px;
}

.article-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.article-breadcrumbs a {
  color: var(--text-secondary);
}

.article-breadcrumbs a:hover {
  color: var(--mach-cyan);
}

.article-main-title {
  font-size: 2.5rem;
  font-weight: 850;
  line-height: 1.3;
  margin-bottom: 18px;
  color: var(--text-main);
}

.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

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

/* 文章目录 (Table of Contents) */
.article-toc-box {
  background: var(--bg-card);
  border: 1px solid var(--border-stealth);
  border-radius: 16px;
  padding: 24px 28px;
  margin-bottom: 40px;
  box-shadow: var(--card-shadow);
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--mach-cyan);
  border-radius: 2px;
}

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

.toc-item a {
  font-size: 0.94rem;
  color: var(--text-secondary);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.toc-item a:hover {
  color: var(--mach-cyan);
  transform: translateX(4px);
}

/* 文章正文 (Prose Typography) */
.article-prose {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-prose h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 48px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-prose h2::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 22px;
  background: var(--primary-gradient);
  border-radius: 2px;
  flex-shrink: 0;
}

.article-prose h3 {
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--text-main);
  margin-top: 32px;
  margin-bottom: 14px;
}

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

.article-prose ul, .article-prose ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

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

.article-prose strong {
  color: var(--text-main);
  font-weight: 700;
}

/* 引用与强调框 */
.article-callout {
  background: var(--bg-surface);
  border-left: 4px solid var(--mach-cyan);
  border-radius: 0 12px 12px 0;
  padding: 20px 24px;
  margin: 30px 0;
  border-top: 1px solid var(--border-card);
  border-right: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
}

.article-callout p:last-child {
  margin-bottom: 0;
}

/* 官方内链高亮胶囊 (SEO Internal Link Pill) */
.brand-internal-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
  color: var(--mach-cyan);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-stealth);
  border-radius: 6px;
  padding: 2px 8px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.brand-internal-link:hover {
  background: rgba(0, 242, 254, 0.2);
  border-color: var(--mach-cyan);
  box-shadow: 0 0 10px var(--mach-cyan-glow);
}

/* 对比表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 30px 0;
}

.seo-comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-card);
  font-size: 0.95rem;
}

.seo-comparison-table th,
.seo-comparison-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-card);
}

.seo-comparison-table th {
  background: var(--bg-surface);
  color: var(--text-main);
  font-weight: 750;
  border-bottom: 2px solid var(--border-stealth);
}

.seo-comparison-table tr:hover td {
  background: var(--bg-surface);
}

/* 文章内专属 FAQ 列表 */
.article-faq-wrap {
  margin: 45px 0;
  border-top: 1px solid var(--border-stealth);
  padding-top: 35px;
}

.article-faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  padding: 22px 24px;
  margin-bottom: 16px;
}

.article-faq-q {
  font-size: 1.15rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-q::before {
  content: "Q";
  color: var(--mach-cyan);
  font-weight: 900;
  font-family: ui-monospace, monospace;
}

.article-faq-a {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* 相关阅读区域 (Related Reading) */
.related-reading-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-stealth);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

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

.related-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.related-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .article-main-title {
    font-size: 1.85rem;
  }
  .article-prose h2 {
    font-size: 1.4rem;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}