/* ==========================================================================
   LinkCube (绿叶机场) - Acid-Cyber Isometric Brutalist Design System
   https://linkcube.click
   Palette: Deep Void Black (#080808) / Acid Volt Green (#a3e635) / Chalk-White
   ========================================================================== */

/* --- CSS 变量系统 (高压电核与酸性赛博设计语言) --- */
:root {
  /* 默认：白天模式 (工业酸性极简钛白工业感) */
  --bg-primary: #f4f6f3;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-card-subtle: #ebf0e8;
  --bg-glass: rgba(244, 246, 243, 0.88);
  
  --text-main: #090c08;
  --text-muted: #4b5847;
  --text-light: #7c8b78;
  
  --border-color: #d1ded0;
  --border-hard: #090c08;
  --border-focus: #4d7c0f;
  
  /* 高能酸绿核心调色盘 */
  --acid-green: #65a30d;
  --acid-volt: #84cc16;
  --acid-bright: #a3e635;
  --acid-rgb: 101, 163, 13;
  --acid-glow: rgba(101, 163, 13, 0.35);
  --acid-card-hover: rgba(132, 204, 22, 0.08);

  --accent-cyan: #0284c7;
  --accent-purple: #7e22ce;
  --accent-red: #dc2626;

  /* 等角硬朗几何阴影与机械投影 */
  --shadow-iso: 4px 4px 0px #090c08;
  --shadow-iso-sm: 2px 2px 0px #090c08;
  --shadow-iso-lg: 8px 8px 0px #090c08;
  --shadow-iso-hover: 6px 6px 0px #090c08;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", Consolas, monospace;

  --transition-fast: 0.12s cubic-bezier(0.2, 0, 0, 1);
  --transition-normal: 0.25s ease;
}

/* 夜间模式 (Acid-Cyber Deep Void Black 极客夜战版) */
[data-theme="dark"] {
  --bg-primary: #080808;
  --bg-surface: #10140e;
  --bg-surface-elevated: #161c14;
  --bg-card-subtle: #0d120c;
  --bg-glass: rgba(8, 8, 8, 0.88);
  
  --text-main: #f5f8f3;
  --text-muted: #9ab096;
  --text-light: #5f745c;
  
  --border-color: #1f2b1d;
  --border-hard: #a3e635;
  --border-focus: #bef264;
  
  /* 高能酸性荧光绿 */
  --acid-green: #a3e635;
  --acid-volt: #bef264;
  --acid-bright: #d9f99d;
  --acid-rgb: 163, 230, 53;
  --acid-glow: rgba(163, 230, 53, 0.45);
  --acid-card-hover: rgba(163, 230, 53, 0.06);

  --accent-cyan: #38bdf8;
  --accent-purple: #c084fc;
  --accent-red: #f87171;

  --shadow-iso: 4px 4px 0px #a3e635;
  --shadow-iso-sm: 2px 2px 0px #a3e635;
  --shadow-iso-lg: 8px 8px 0px #a3e635;
  --shadow-iso-hover: 6px 6px 0px #bef264;
}

/* --- 全局重置与等角粗野主义网格底纹 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  position: relative;
}

/* 赛博等角坐标网格背景 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(var(--acid-rgb), 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(var(--acid-rgb), 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

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

img, svg {
  vertical-align: middle;
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

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

.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

/* --- 容器布局 --- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 95px 0;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 56px auto;
}

/* 工业遥测角括号标签 [SYS.TAG] */
.telemetry-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--acid-green);
  background: rgba(var(--acid-rgb), 0.08);
  padding: 4px 14px;
  border: 1px solid var(--acid-green);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  position: relative;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  color: var(--text-main);
  text-transform: uppercase;
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* --- 顶部导航栏 (Header) --- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 2px solid var(--border-color);
  transition: all var(--transition-normal);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-logo-img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: cover;
  display: block;
  border: 1px solid var(--border-color);
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.08) rotate(2deg);
}

.brand-text {
  font-family: var(--font-mono);
}

.brand-text span {
  color: var(--acid-green);
}

.brand-alias {
  font-size: 0.72rem;
  background: rgba(var(--acid-rgb), 0.12);
  color: var(--acid-green);
  border: 1px solid var(--acid-green);
  padding: 1px 6px;
  margin-left: 6px;
  font-weight: 600;
  letter-spacing: 0;
  vertical-align: middle;
}

/* 导航目录：首页 + 板块锚点 + 推荐资讯 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 6px 4px;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--acid-green);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--acid-green);
  transition: width 0.2s cubic-bezier(0.2, 0, 0, 1);
}

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

/* “推荐资讯”高亮标识 */
.nav-link-intel {
  color: var(--text-main);
  border-bottom: 1px dashed var(--acid-green);
}
.nav-link-intel::before {
  content: '⚡';
  margin-right: 4px;
  font-size: 0.8rem;
}

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

/* --- 昼夜模式切换按钮（工业透明微磨砂） --- */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--acid-rgb), 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  transition: all var(--transition-fast);
  position: relative;
  clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
}

.theme-toggle-btn:hover {
  border-color: var(--acid-green);
  background: rgba(var(--acid-rgb), 0.15);
  box-shadow: 0 0 12px var(--acid-glow);
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease, opacity 0.2s ease;
}

.sun-icon {
  opacity: 1;
  transform: rotate(0deg);
}

.moon-icon {
  position: absolute;
  opacity: 0;
  transform: rotate(-90deg) scale(0.6);
}

[data-theme="dark"] .sun-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0.6);
}

[data-theme="dark"] .moon-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* 移动端汉堡折叠 */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

/* --- 按钮系统：等角 Z 轴机械物理下压弹簧按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  user-select: none;
  white-space: nowrap;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-md {
  padding: 12px 24px;
  font-size: 0.95rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* 核心酸绿机械下压按钮 (Primary Isometric CTA) */
.btn-primary {
  background: var(--acid-green);
  color: #080808;
  border: 2px solid #080808;
  box-shadow: 4px 4px 0px #080808;
}

[data-theme="dark"] .btn-primary {
  border: 2px solid #bef264;
  box-shadow: 4px 4px 0px #bef264;
  color: #080808;
}

.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px #080808, 0 0 20px var(--acid-glow);
}

[data-theme="dark"] .btn-primary:hover {
  box-shadow: 6px 6px 0px #bef264, 0 0 25px var(--acid-glow);
}

/* 机械物理 Z 轴下压核心手感 */
.btn-primary:active {
  transform: translate(3px, 3px) !important;
  box-shadow: 1px 1px 0px #080808 !important;
}

[data-theme="dark"] .btn-primary:active {
  box-shadow: 1px 1px 0px #bef264 !important;
}

/* 次要线框按钮 */
.btn-outline {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 2px solid var(--border-color);
  box-shadow: 3px 3px 0px var(--border-color);
}

.btn-outline:hover {
  border-color: var(--acid-green);
  color: var(--acid-green);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--acid-green);
}

.btn-outline:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0px var(--acid-green);
}

/* --- 主视觉区 (Hero Section) --- */
.hero-section {
  padding: 85px 0 95px 0;
  position: relative;
  text-align: center;
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
  color: var(--text-main);
  text-transform: uppercase;
}

.hero-title .brand-highlight {
  color: var(--acid-green);
  text-shadow: 0 0 20px var(--acid-glow);
  display: inline-block;
}

.hero-subtitle-block {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-intro-text {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px auto;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

/* 遥测性能指标板 (Telemetry Stat Grid) */
.hero-telemetry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto;
}

.telemetry-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 22px 18px;
  text-align: left;
  position: relative;
  box-shadow: var(--shadow-iso-sm);
  transition: all var(--transition-fast);
}

.telemetry-card:hover {
  border-color: var(--acid-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-iso);
}

.telemetry-label {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-light);
  text-transform: uppercase;
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
}

.telemetry-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 900;
  color: var(--acid-green);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.telemetry-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- 核心优势区 (3个等角图文切角卡片) --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.brutalist-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  padding: 36px 30px;
  position: relative;
  box-shadow: var(--shadow-iso);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.brutalist-card:hover {
  border-color: var(--acid-green);
  box-shadow: var(--shadow-iso-hover), 0 0 25px var(--acid-glow);
  transform: translate(-3px, -3px);
}

.card-corner-bracket {
  position: absolute;
  top: 8px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-light);
  font-weight: 700;
}

.card-icon-box {
  width: 52px;
  height: 52px;
  background: rgba(var(--acid-rgb), 0.1);
  border: 1px solid var(--acid-green);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--acid-green);
  margin-bottom: 24px;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.card-desc {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex: 1;
}

.card-checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px dashed var(--border-color);
  padding-top: 18px;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.check-item svg {
  color: var(--acid-green);
  flex-shrink: 0;
}

/* --- 特色图卡区：流媒体图卡 + AI 支持图卡 --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.showcase-block {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  padding: 38px;
  box-shadow: var(--shadow-iso);
  position: relative;
  transition: all var(--transition-normal);
}

.showcase-block:hover {
  border-color: var(--acid-green);
  box-shadow: var(--shadow-iso-hover), 0 0 25px var(--acid-glow);
  transform: translate(-2px, -2px);
}

.showcase-header {
  margin-bottom: 26px;
}

.showcase-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 10px;
  border: 1px solid;
  display: inline-block;
  margin-bottom: 12px;
}

.badge-stream {
  color: #ef4444;
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

.badge-ai {
  color: var(--acid-green);
  border-color: var(--acid-green);
  background: rgba(var(--acid-rgb), 0.08);
}

.showcase-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

.showcase-p {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.cyber-badge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.cyber-badge-item {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  padding: 12px 10px;
  text-align: center;
  transition: all var(--transition-fast);
}

.cyber-badge-item:hover {
  border-color: var(--acid-green);
  background: rgba(var(--acid-rgb), 0.1);
  transform: translateY(-2px);
}

.cyber-badge-item .b-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
}

.cyber-badge-item .b-status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--acid-green);
  margin-top: 4px;
  display: block;
}

/* --- 套餐价格对比表 (Acid-Kinetic 微交互 + 网上真实机场价格) --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

/* 高频频闪荧光管脉冲微交互 (High-frequency strobe flicker keyframes) */
@keyframes strobe-flicker {
  0% {
    border-color: var(--acid-green);
    box-shadow: 0 0 10px var(--acid-glow);
  }
  15% {
    border-color: rgba(var(--acid-rgb), 0.2);
    box-shadow: none;
  }
  30% {
    border-color: var(--acid-green);
    box-shadow: 0 0 35px var(--acid-glow), inset 0 0 15px rgba(var(--acid-rgb), 0.15);
  }
  45% {
    border-color: rgba(var(--acid-rgb), 0.3);
    box-shadow: 0 0 5px var(--acid-glow);
  }
  60% {
    border-color: var(--acid-green);
    box-shadow: 0 0 28px var(--acid-glow);
  }
  100% {
    border-color: var(--acid-green);
    box-shadow: var(--shadow-iso-hover), 0 0 30px var(--acid-glow);
  }
}

.plan-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-iso);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.plan-card:hover {
  animation: strobe-flicker 0.45s ease forwards;
  transform: translate(-3px, -3px);
}

.plan-card.featured {
  border: 2px solid var(--acid-green);
  box-shadow: var(--shadow-iso-hover), 0 0 20px var(--acid-glow);
}

.plan-tag-top {
  position: absolute;
  top: -14px;
  left: 24px;
  font-family: var(--font-mono);
  background: var(--acid-green);
  color: #080808;
  font-size: 0.76rem;
  font-weight: 800;
  padding: 3px 12px;
  border: 1px solid #080808;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.plan-header {
  border-bottom: 2px dashed var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 24px;
}

.plan-tier-name {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text-main);
  text-transform: uppercase;
}

.plan-tier-sub {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 18px 0 6px 0;
}

.price-currency {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--acid-green);
}

.price-val {
  font-family: var(--font-mono);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
  letter-spacing: -0.04em;
}

.price-billing {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-light);
}

.plan-features-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 32px;
}

.p-feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.p-feature svg {
  color: var(--acid-green);
  flex-shrink: 0;
  margin-top: 3px;
}

.p-feature strong {
  color: var(--text-main);
}

/* --- 用户评价 (User Reviews) --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 30px;
  box-shadow: var(--shadow-iso-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.review-box:hover {
  border-color: var(--acid-green);
  transform: translateY(-3px);
  box-shadow: var(--shadow-iso);
}

.review-telemetry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--acid-green);
  margin-bottom: 14px;
}

.review-text {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
  flex: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px dashed var(--border-color);
  padding-top: 16px;
}

.author-avatar-mono {
  width: 40px;
  height: 40px;
  background: rgba(var(--acid-rgb), 0.15);
  border: 1px solid var(--acid-green);
  color: var(--acid-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
}

.author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-light);
  font-family: var(--font-mono);
}

/* --- 常见问题解答 (FAQ) --- */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-iso-sm);
  transition: all var(--transition-fast);
}

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

.faq-title {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-title::-webkit-details-marker {
  display: none;
}

.faq-indicator {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--acid-green);
  transition: transform 0.2s ease;
}

details[open] .faq-indicator {
  transform: rotate(45deg);
}

.faq-body {
  padding: 0 26px 22px 26px;
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.75;
  border-top: 1px dashed var(--border-color);
  margin-top: 6px;
  padding-top: 16px;
}

/* 底部 CTA 机械横幅 */
.bottom-cyber-banner {
  margin-top: 55px;
  background: var(--bg-surface);
  border: 3px solid var(--acid-green);
  padding: 56px 40px;
  text-align: center;
  box-shadow: var(--shadow-iso-lg), 0 0 35px var(--acid-glow);
  position: relative;
}

.bottom-cyber-title {
  font-size: 2.3rem;
  font-weight: 900;
  margin-bottom: 14px;
  color: var(--text-main);
  text-transform: uppercase;
}

.bottom-cyber-p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 32px auto;
}

/* --- 页脚 (严格只保留四个标题，在新页面打开) --- */
.site-footer {
  border-top: 2px solid var(--border-color);
  background: var(--bg-surface);
  padding: 50px 0 36px 0;
  margin-top: 80px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  padding: 6px 12px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.footer-link:hover {
  color: var(--acid-green);
  border-color: var(--acid-green);
  background: rgba(var(--acid-rgb), 0.08);
}

.footer-bottom {
  text-align: center;
  padding-top: 22px;
  border-top: 1px dashed var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--text-light);
}

/* --- 子页面通用粗野主义样式 --- */
.subpage-hero {
  padding: 70px 0 45px 0;
  text-align: center;
  border-bottom: 2px solid var(--border-color);
  background: var(--bg-surface);
  margin-bottom: 50px;
}

.subpage-content {
  max-width: 900px;
  margin: 0 auto;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.subpage-content h2 {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-main);
  margin: 42px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
  text-transform: uppercase;
}

.subpage-content h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 26px 0 12px 0;
}

.subpage-content p {
  margin-bottom: 16px;
}

.subpage-content ul, .subpage-content ol {
  margin: 16px 0 24px 24px;
}

.subpage-content li {
  margin-bottom: 8px;
}

.cyber-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-iso-sm);
  padding: 24px;
  margin: 24px 0;
}

/* --- 资讯页专属样式 (Article Feed Cards) --- */
.news-feed-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 20px;
}

.news-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-iso);
  padding: 30px;
  transition: all var(--transition-fast);
}

.news-card:hover {
  border-color: var(--acid-green);
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-iso-hover);
}

.news-meta {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--acid-green);
  margin-bottom: 12px;
}

.news-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

/* --- 长篇 SEO 科普文章专属模块样式 (TOC, Callout, FAQ, Related) --- */
.article-header {
  margin-bottom: 36px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 24px;
}

.article-category {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--acid-green);
  background: rgba(var(--acid-rgb), 0.1);
  border: 1px solid var(--acid-green);
  padding: 3px 12px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.article-title-main {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-light);
  flex-wrap: wrap;
}

.article-meta-bar span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 目录模块 (Table of Contents) */
.article-toc {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-iso-sm);
  padding: 24px 28px;
  margin: 32px 0 40px 0;
  position: relative;
}

.article-toc-title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--acid-green);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 !important;
  padding-left: 0 !important;
  list-style: none !important;
}

.toc-item a {
  color: var(--text-muted);
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

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

.toc-num {
  font-family: var(--font-mono);
  color: var(--acid-green);
  font-weight: 700;
  font-size: 0.85rem;
}

/* 提示高亮框 */
.callout-box {
  background: var(--bg-card-subtle);
  border-left: 4px solid var(--acid-green);
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 0.96rem;
  line-height: 1.7;
}

.callout-box strong {
  color: var(--text-main);
}

/* 相关阅读网格 (Related Readings) */
.related-readings-wrap {
  margin-top: 55px;
  padding-top: 35px;
  border-top: 2px dashed var(--border-color);
}

.related-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 22px;
  font-family: var(--font-mono);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.related-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 20px;
  box-shadow: var(--shadow-iso-sm);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  border-color: var(--acid-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-iso);
}

.related-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 8px;
}

.related-card-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
  flex: 1;
}

.related-card-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--acid-green);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 768px) {
  .article-title-main {
    font-size: 1.75rem;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================================
   响应式媒体查询 (@media) - 确保手机端单栏与精准拇指操控
   ========================================================================== */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }

  .grid-3 {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }

  .grid-2 {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .nav-links {
    display: none;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 2px solid var(--border-color);
    padding: 24px;
    gap: 18px;
    box-shadow: var(--shadow-iso);
  }

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

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

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

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

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

  .footer-link {
    width: 100%;
    text-align: center;
    border: 1px solid var(--border-color);
    padding: 10px;
  }

  .bottom-cyber-banner {
    padding: 36px 20px;
  }

  .bottom-cyber-title {
    font-size: 1.7rem;
  }
}

@media (max-width: 480px) {
  .hero-telemetry-grid {
    grid-template-columns: 1fr;
  }

  .cyber-badge-grid {
    grid-template-columns: 1fr;
  }

  .showcase-block {
    padding: 24px 20px;
  }

  .plan-card {
    padding: 32px 20px;
  }
}