/* ===================================================================
   尔湾云 (Irvine Cloud) - 数字隐形斗篷风 (Invisibility Cloak Style)
   =================================================================== */

:root {
  --bg-primary: #06090e;
  --bg-secondary: #0c121e;
  --bg-card: rgba(16, 24, 39, 0.75);
  --bg-card-hover: rgba(22, 34, 56, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(16, 185, 129, 0.4);
  --border-danger: rgba(239, 68, 68, 0.4);

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-cloak: #10b981;     /* 隐形冷翠绿 */
  --accent-cloak-glow: #059669;
  --accent-cyan: #06b6d4;      /* 光学折射青 */
  --accent-thermal: #ef4444;   /* 热成像赤红 */
  --accent-thermal-glow: #f97316;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --max-w: 1240px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  line-height: 1.6;
}

/* 动态背景画布 */
#cloak-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.85;
}

/* 顶部通栏公告条 */
.top-notice-bar {
  background: linear-gradient(90deg, #b91c1c 0%, #c2410c 30%, #047857 70%, #065f46 100%);
  color: #ffffff;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  position: relative;
  z-index: 100;
  text-align: center;
}

.notice-badge {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.notice-link {
  color: #a7f3d0;
  text-decoration: underline;
  margin-left: 8px;
  font-weight: 600;
}

/* 顶部固定导航栏 */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 90;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(6, 9, 14, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-icon-prism {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #3b82f6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.5);
  position: relative;
}

.logo-icon-prism::after {
  content: "";
  position: absolute;
  inset: 2px;
  background: #06090e;
  border-radius: 6px;
  z-index: 1;
}

.logo-inner-dot {
  position: relative;
  z-index: 2;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
}

.brand-title {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-tagline {
  font-size: 0.68rem;
  color: var(--accent-cloak);
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
}

.nav-link.highlight {
  color: #6ee7b7;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link.highlight::after {
  content: "NEW";
  font-size: 0.65rem;
  padding: 1px 4px;
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--accent-cloak);
  border-radius: 4px;
  color: var(--accent-cloak);
}

.nav-cta-btn {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  padding: 8px 18px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.55);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* 核心 Hero 区域 */
.hero-section {
  padding: 60px 24px 80px;
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.pill-glow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.6; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(180deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title span.highlight-cloak {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: #cbd5e1;
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-quote-highlight {
  display: block;
  font-weight: 600;
  color: #34d399;
  margin-top: 10px;
  font-size: 1.15em;
  text-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-primary-cloak {
  background: linear-gradient(135deg, #10b981 0%, #047857 100%);
  color: #ffffff;
  padding: 16px 36px;
  border-radius: 12px;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 700;
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary-cloak:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 40px rgba(16, 185, 129, 0.65);
}

.btn-secondary-cloak {
  background: rgba(255, 255, 255, 0.05);
  color: #e2e8f0;
  padding: 16px 28px;
  border-radius: 12px;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary-cloak:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

/* 核心交互：热成像对比滑动条 (Thermal vs Cloaked) */
.cloak-interactive-card {
  max-width: 1060px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8), 0 0 35px rgba(16, 185, 129, 0.1);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  position: relative;
  overflow: hidden;
}

.comparison-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.comparison-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
}

.comparison-hint {
  font-size: 0.82rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.thermal-cloak-stage {
  position: relative;
  width: 100%;
  height: 480px;
  border-radius: 14px;
  overflow: hidden;
  user-select: none;
  touch-action: pan-y;
  background: #04060a;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* 基础图层共用容器 */
.stage-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 32px;
}

/* 左侧：普通网络 (Thermal 模式，红色热成像指纹暴露) */
.layer-thermal {
  background: 
    radial-gradient(circle at 30% 40%, rgba(239, 68, 68, 0.25) 0%, transparent 60%),
    radial-gradient(circle at 70% 60%, rgba(249, 115, 22, 0.2) 0%, transparent 50%),
    linear-gradient(180deg, #180909 0%, #0d0404 100%);
  color: #fca5a5;
  z-index: 1;
}

.layer-thermal::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(239, 68, 68, 0.08) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(239, 68, 68, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* 右侧：披上隐形斗篷 (Cloaked 模式，水波纹冷翠绿零痕迹) */
.layer-cloaked {
  background: 
    radial-gradient(circle at 40% 40%, rgba(16, 185, 129, 0.25) 0%, transparent 60%),
    radial-gradient(circle at 80% 30%, rgba(6, 182, 212, 0.2) 0%, transparent 50%),
    linear-gradient(180deg, #061512 0%, #040c0b 100%);
  color: #a7f3d0;
  z-index: 2;
  position: absolute;
  inset: 0;
  /* clip-path 由 JS 动态控制 */
  clip-path: polygon(50% 0, 100% 0, 100% 100%, 50% 100%);
}

.layer-cloaked::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(16, 185, 129, 0.08) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(16, 185, 129, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* 状态徽章 */
.fingerprint-status-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  width: fit-content;
}

.tag-thermal {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.6);
  color: #ef4444;
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.3);
}

.tag-cloaked {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.6);
  color: #10b981;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.3);
}

/* 热成像网格与指标卡 */
.fingerprint-data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  position: relative;
  z-index: 5;
  margin-top: 20px;
}

.fp-card {
  background: rgba(0, 0, 0, 0.55);
  border-radius: 12px;
  padding: 16px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fp-card.danger {
  border-color: rgba(239, 68, 68, 0.4);
  box-shadow: inset 0 0 12px rgba(239, 68, 68, 0.15);
}

.fp-card.safe {
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: inset 0 0 12px rgba(16, 185, 129, 0.15);
}

.fp-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.fp-value {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.fp-value.red {
  color: #f87171;
  text-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

.fp-value.green {
  color: #34d399;
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.fp-sub {
  font-size: 0.78rem;
  opacity: 0.85;
}

/* 视觉化中心透视示意 */
.fingerprint-center-graphic {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  position: relative;
  z-index: 4;
}

.radar-sweep-box {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 1px dashed rgba(239, 68, 68, 0.6);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: radar-spin 8s linear infinite;
}

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

.radar-sweep-line {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50%;
  height: 2px;
  background: linear-gradient(90deg, #ef4444, transparent);
  transform-origin: 0 0;
}

.cloaked-shield-box {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 2px solid rgba(16, 185, 129, 0.6);
  background: radial-gradient(circle, rgba(16, 185, 129, 0.2) 0%, transparent 70%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: cloak-ripple 3s infinite ease-out;
}

@keyframes cloak-ripple {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { box-shadow: 0 0 0 30px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* 滑动拖拽条 */
.slider-handle-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: #ffffff;
  z-index: 10;
  cursor: ew-resize;
  transform: translateX(-50%);
  box-shadow: 0 0 15px #ffffff, 0 0 30px rgba(16, 185, 129, 0.8);
  pointer-events: none;
}

.slider-handle-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #0f172a;
  border: 2px solid #ffffff;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.8), 0 0 15px rgba(16, 185, 129, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  pointer-events: auto;
  cursor: ew-resize;
  transition: transform 0.15s ease;
}

.slider-handle-knob:hover {
  transform: translate(-50%, -50%) scale(1.1);
}

/* 滑块底部快捷拨片控制 */
.stage-quick-controls {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.control-btn-group {
  display: flex;
  gap: 8px;
}

.quick-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.quick-btn:hover, .quick-btn.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-cloak);
  color: #34d399;
}

.stat-reading {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #cbd5e1;
}

/* 核心特性与优势板块 (#features) */
.section-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 90px 24px;
  position: relative;
}

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

.section-badge {
  display: inline-block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-cloak);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 25px rgba(16, 185, 129, 0.15);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cloak);
  font-size: 1.5rem;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.feature-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 实时节点状态与网络延迟板块 (#nodes) */
.nodes-board {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 32px;
  backdrop-filter: blur(20px);
}

.nodes-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.meta-sla {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.sla-dot-pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulse-dot 1.8s infinite;
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.node-item-card {
  background: rgba(10, 16, 26, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 20px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.node-item-card:hover {
  border-color: rgba(16, 185, 129, 0.5);
  background: rgba(15, 23, 42, 0.9);
  transform: translateY(-2px);
}

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

.node-region-flag {
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #fff;
}

.node-type-tag {
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(6, 182, 212, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(6, 182, 212, 0.3);
  font-family: var(--font-mono);
}

.node-metrics-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.node-ping-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: #34d399;
  display: flex;
  align-items: center;
  gap: 4px;
}

.node-loss-val {
  font-size: 0.8rem;
  color: #94a3b8;
  font-family: var(--font-mono);
}

/* 套餐价格板块 (#pricing) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(16, 185, 129, 0.5);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6);
}

.pricing-card.popular {
  border-color: var(--accent-cloak);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, rgba(12, 18, 30, 0.95) 100%);
  box-shadow: 0 0 35px rgba(16, 185, 129, 0.18);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #10b981, #06b6d4);
  color: #06090e;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: 999px;
  letter-spacing: 0.06em;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  min-height: 40px;
  margin-bottom: 20px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
  font-family: var(--font-mono);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: #cbd5e1;
}

.check-icon {
  color: var(--accent-cloak);
  font-weight: bold;
}

.btn-plan-order {
  display: block;
  text-align: center;
  padding: 14px 20px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
}

.btn-plan-order.primary {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.4);
}

.btn-plan-order.primary:hover {
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6);
  transform: translateY(-2px);
}

.btn-plan-order.outline {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: #fff;
}

.btn-plan-order.outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

/* 常见问题手风琴板块 (#faq) */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  gap: 16px;
}

.faq-icon-arrow {
  transition: transform 0.3s ease;
  color: var(--accent-cloak);
  font-size: 1.2rem;
}

.faq-item.active .faq-icon-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  padding-bottom: 24px;
}

/* 用户真实评价板块 (#reviews) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 185, 129, 0.3);
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 1rem;
}

.review-quote {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e293b, #334155);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #38bdf8;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.reviewer-name {
  font-weight: 700;
  color: #fff;
  font-size: 0.95rem;
}

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

/* 知识库引导卡片（首页底部跳转入口） */
.kb-entry-banner {
  margin-top: 40px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  backdrop-filter: blur(20px);
}

.kb-banner-content {
  max-width: 680px;
}

.kb-banner-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

.kb-banner-desc {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.7;
}

.kb-banner-btn {
  background: #ffffff;
  color: #06090e;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

.kb-banner-btn:hover {
  transform: translateY(-2px);
  background: #f1f5f9;
}

/* 页脚 (#footer) */
.footer-wrap {
  border-top: 1px solid var(--border-subtle);
  background: rgba(4, 7, 12, 0.9);
  padding: 60px 24px 30px;
  margin-top: 60px;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-top: 14px;
  max-width: 340px;
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link-item a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-link-item a:hover {
  color: var(--accent-cloak);
}

.footer-bottom-bar {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* 知识库专用样式 (KB Section & Article Layout) */
.kb-page-header {
  padding: 60px 24px 40px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.kb-page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
}

.kb-page-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.kb-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 28px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 24px 80px;
}

.kb-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.kb-article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 185, 129, 0.4);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

.kb-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.kb-tag-pill {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
  font-family: var(--font-mono);
}

.kb-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.4;
}

.kb-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.kb-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}

.kb-read-more {
  color: var(--accent-cloak);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 知识库深度文章正文排版 (Article Detail) */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 50px 24px 100px;
}

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

.breadcrumb-nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb-nav a:hover {
  color: var(--accent-cloak);
}

.article-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 28px;
  margin-bottom: 36px;
}

.article-h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
}

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

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 32px 0 16px;
}

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

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

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

.article-callout {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--accent-cloak);
  padding: 18px 22px;
  border-radius: 0 10px 10px 0;
  margin: 28px 0;
  font-size: 0.98rem;
  color: #e2e8f0;
}

.article-callout.warning {
  background: rgba(239, 68, 68, 0.08);
  border-left-color: var(--accent-thermal);
}

.article-code-block {
  background: #020408;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 20px;
  margin: 24px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #38bdf8;
  line-height: 1.6;
}

.article-cta-box {
  margin-top: 60px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid var(--accent-cloak);
  border-radius: 16px;
  padding: 36px;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 12px;
}

.article-cta-box p {
  color: #cbd5e1;
  margin-bottom: 24px;
}

/* 响应式调整 */
@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(6, 9, 14, 0.98);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-subtle);
    gap: 16px;
  }

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

  .menu-toggle {
    display: block;
  }

  .thermal-cloak-stage {
    height: 600px;
  }

  .stage-layer {
    padding: 20px;
  }

  .fingerprint-data-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .fingerprint-center-graphic {
    display: none;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}