/* ====================================================================
   LinkCube绿叶 (linkcube.help) 全局样式表
   设计风格：Cyber-Neon Aurora & Dynamic Multi-Color Spectrum (赛博极光与多色相幻彩动效)
   视觉特性：全景微动效光晕、丰富多彩相色谱、悬浮动效、毛玻璃拟态、高能交互
   ==================================================================== */

:root {
  /* 基础暗黑深空曜石底色 */
  --bg-body: #070a12;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(22, 33, 62, 0.88);
  --bg-surface: #1e293b;
  --bg-surface-elevated: #283548;
  
  /* 多色相幻彩光谱体系 (丰富色彩) */
  --color-blue: #3b82f6;
  --color-cyan: #06b6d4;
  --color-emerald: #10b981;
  --color-violet: #8b5cf6;
  --color-purple: #a855f7;
  --color-amber: #f59e0b;
  --color-rose: #f43f5e;
  --color-pink: #ec4899;
  
  /* 品牌主色与渐变系统 */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --gradient-cyber: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --gradient-aurora: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 50%, #06b6d4 100%);
  --gradient-sunset: linear-gradient(135deg, #f59e0b 0%, #f43f5e 100%);
  --gradient-emerald: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --gradient-violet: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
  
  /* 文本系统 (超高清晰对比度) */
  --text-main: #ffffff;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dark: #64748b;
  
  /* 精密线条与微光边框 */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.04);
  --border-glow-blue: rgba(59, 130, 246, 0.4);
  --border-glow-violet: rgba(139, 92, 246, 0.4);
  --border-glow-cyan: rgba(6, 182, 212, 0.4);
  --border-glow-amber: rgba(245, 158, 11, 0.4);
  
  /* 阴影与光环 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 16px rgba(59, 130, 246, 0.08);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 28px rgba(139, 92, 246, 0.15);
  --shadow-glow: 0 0 35px rgba(59, 130, 246, 0.35);
  
  /* 尺寸与规范 */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --container-max: 1160px;
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  background-color: var(--bg-body);
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-body);
  color: var(--text-body);
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-bottom: 76px;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

@media (min-width: 769px) {
  body {
    padding-bottom: 0;
  }
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: #38bdf8;
  text-shadow: 0 0 8px rgba(56, 189, 248, 0.4);
}

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

button, input {
  font-family: inherit;
}

/* ====================================================================
   动态环境光晕层 (纯 CSS 动画，零外部依赖，极速渲染)
   ==================================================================== */

.ambient-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.28;
  mix-blend-mode: screen;
}

.orb-blue {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #2563eb 0%, transparent 70%);
  top: -100px;
  left: -100px;
  animation: orbFloat1 18s ease-in-out infinite alternate;
}

.orb-violet {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #7c3aed 0%, transparent 70%);
  top: 30%;
  right: -150px;
  animation: orbFloat2 22s ease-in-out infinite alternate;
}

.orb-cyan {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #06b6d4 0%, transparent 70%);
  bottom: 5%;
  left: 20%;
  animation: orbFloat3 16s ease-in-out infinite alternate;
}

@keyframes orbFloat1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(80px, 60px) scale(1.1); }
  100% { transform: translate(-40px, 100px) scale(0.95); }
}

@keyframes orbFloat2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-100px, -70px) scale(1.15); }
  100% { transform: translate(60px, 80px) scale(0.9); }
}

@keyframes orbFloat3 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, -80px) scale(1.08); }
  100% { transform: translate(-70px, 40px) scale(0.95); }
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 1;
}

/* 交互按钮体系 (渐变极光流光与高光) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  white-space: nowrap;
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-cyber);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6 0%, #0891b2 100%);
  color: #ffffff;
  box-shadow: 0 6px 22px rgba(6, 182, 212, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* 顶部导航 Header (玻璃拟态微透) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(7, 10, 18, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.brand-logo:hover {
  color: var(--text-main);
}

.logo-cube {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.2) 0%, rgba(6, 182, 212, 0.2) 100%);
  border: 1px solid var(--border-glow-cyan);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.3);
}

.site-nav {
  display: none;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.2s ease;
  position: relative;
}

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

.nav-link:hover::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-cyber);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-main);
}

/* 移动端菜单抽屉 */
.mobile-menu {
  display: none;
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  background-color: #0b1120;
  border-bottom: 1px solid var(--border-color);
  padding: 18px 20px;
  box-shadow: var(--shadow-lg);
}

.mobile-menu.is-open {
  display: block;
}

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

.mobile-nav-link {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-subtle);
}

@media (min-width: 860px) {
  .site-nav {
    display: flex;
  }
  .nav-toggle {
    display: none;
  }
  .mobile-menu {
    display: none !important;
  }
}

/* ====================================================================
   Hero 首屏 (全景代码级矢量插画 + 动效背景)
   ==================================================================== */

.hero-section {
  padding: 65px 0 60px;
  text-align: center;
  position: relative;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}

/* 纯 SVG 背景画与多重微动效 */
.hero-scenery-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

.hero-scenery-backdrop svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 背景光波与微粒动画 */
.anim-aurora {
  animation: auroraWave 12s ease-in-out infinite alternate;
  transform-origin: center;
}

@keyframes auroraWave {
  0% { transform: translateY(0) scaleY(1); opacity: 0.5; }
  100% { transform: translateY(-25px) scaleY(1.08); opacity: 0.85; }
}

.anim-core {
  animation: corePulse 4s ease-in-out infinite;
  transform-origin: 720px 250px;
}

@keyframes corePulse {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 15px rgba(59, 130, 246, 0.4)); }
  50% { transform: scale(1.06); filter: drop-shadow(0 0 35px rgba(6, 182, 212, 0.7)); }
}

.anim-orbit-1 {
  animation: orbitRotate1 28s linear infinite;
  transform-origin: 720px 250px;
}

.anim-orbit-2 {
  animation: orbitRotate2 38s linear infinite reverse;
  transform-origin: 720px 250px;
}

@keyframes orbitRotate1 {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes orbitRotate2 {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.anim-beacon {
  animation: radarWave 3s ease-out infinite;
  transform-origin: 720px 250px;
}

@keyframes radarWave {
  0% { r: 6px; opacity: 1; stroke-width: 2px; }
  100% { r: 160px; opacity: 0; stroke-width: 0.5px; }
}

.anim-star-1 { animation: starBlink 2.5s ease-in-out infinite; }
.anim-star-2 { animation: starBlink 3.5s ease-in-out infinite 0.8s; }
.anim-star-3 { animation: starBlink 4s ease-in-out infinite 1.5s; }

@keyframes starBlink {
  0%, 100% { opacity: 0.2; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.4); }
}

.hero-inner {
  position: relative;
  z-index: 2;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #38bdf8;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18) 0%, rgba(6, 182, 212, 0.18) 100%);
  border: 1px solid var(--border-glow-cyan);
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 22px;
  letter-spacing: 0.02em;
  box-shadow: 0 0 14px rgba(6, 182, 212, 0.2);
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #06b6d4;
  box-shadow: 0 0 10px #06b6d4;
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.hero-title-accent {
  background: var(--gradient-aurora);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 34px;
  line-height: 1.65;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 38px;
}

/* 实时监控指标面板 (Static Widget Mockup) */
.hero-status-dashboard {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  max-width: 720px;
  margin: 0 auto 34px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
}

@media (min-width: 640px) {
  .hero-status-dashboard {
    grid-template-columns: repeat(4, 1fr);
  }
}

.status-metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.metric-value.cyan { color: #38bdf8; }
.metric-value.emerald { color: #34d399; }
.metric-value.violet { color: #c084fc; }
.metric-value.amber { color: #fbbf24; }

.metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.hero-indicators {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  color: var(--text-muted);
  font-size: 0.86rem;
  padding-top: 18px;
  border-top: 1px dashed var(--border-color);
  max-width: 840px;
  margin: 0 auto;
}

.hero-indicator-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-indicator-item svg {
  color: #38bdf8;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .hero-section {
    padding: 85px 0 75px;
  }
  .hero-title {
    font-size: 3.15rem;
  }
}

/* ====================================================================
   丰富多彩的流媒体与 AI 支持矩阵 Showcase
   ==================================================================== */

.showcase-section {
  padding: 50px 0;
  background-color: rgba(11, 17, 32, 0.45);
  border-bottom: 1px solid var(--border-color);
}

.showcase-header {
  text-align: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.showcase-subheader {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 26px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

@media (min-width: 640px) {
  .showcase-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .showcase-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px 14px;
  text-align: center;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.showcase-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.showcase-card:hover {
  transform: translateY(-3px);
  background-color: var(--bg-card-hover);
}

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

/* 各品牌专属色彩边框与高光 */
.showcase-card.brand-netflix:hover { border-color: rgba(244, 63, 94, 0.4); box-shadow: 0 4px 16px rgba(244, 63, 94, 0.2); }
.showcase-card.brand-netflix::before { background: #f43f5e; }

.showcase-card.brand-disney:hover { border-color: rgba(59, 130, 246, 0.4); box-shadow: 0 4px 16px rgba(59, 130, 246, 0.2); }
.showcase-card.brand-disney::before { background: #3b82f6; }

.showcase-card.brand-youtube:hover { border-color: rgba(239, 68, 68, 0.4); box-shadow: 0 4px 16px rgba(239, 68, 68, 0.2); }
.showcase-card.brand-youtube::before { background: #ef4444; }

.showcase-card.brand-prime:hover { border-color: rgba(6, 182, 212, 0.4); box-shadow: 0 4px 16px rgba(6, 182, 212, 0.2); }
.showcase-card.brand-prime::before { background: #06b6d4; }

.showcase-card.brand-spotify:hover { border-color: rgba(16, 185, 129, 0.4); box-shadow: 0 4px 16px rgba(16, 185, 129, 0.2); }
.showcase-card.brand-spotify::before { background: #10b981; }

.showcase-card.brand-apple:hover { border-color: rgba(168, 85, 247, 0.4); box-shadow: 0 4px 16px rgba(168, 85, 247, 0.2); }
.showcase-card.brand-apple::before { background: #a855f7; }

.showcase-card.brand-chatgpt:hover { border-color: rgba(16, 185, 129, 0.4); box-shadow: 0 4px 16px rgba(16, 185, 129, 0.2); }
.showcase-card.brand-chatgpt::before { background: #10b981; }

.showcase-card.brand-claude:hover { border-color: rgba(245, 158, 11, 0.4); box-shadow: 0 4px 16px rgba(245, 158, 11, 0.2); }
.showcase-card.brand-claude::before { background: #f59e0b; }

.showcase-card.brand-gemini:hover { border-color: rgba(59, 130, 246, 0.4); box-shadow: 0 4px 16px rgba(59, 130, 246, 0.2); }
.showcase-card.brand-gemini::before { background: #3b82f6; }

.showcase-card.brand-perplexity:hover { border-color: rgba(6, 182, 212, 0.4); box-shadow: 0 4px 16px rgba(6, 182, 212, 0.2); }
.showcase-card.brand-perplexity::before { background: #06b6d4; }

.showcase-card.brand-copilot:hover { border-color: rgba(139, 92, 246, 0.4); box-shadow: 0 4px 16px rgba(139, 92, 246, 0.2); }
.showcase-card.brand-copilot::before { background: #8b5cf6; }

.showcase-card.brand-cursor:hover { border-color: rgba(56, 189, 248, 0.4); box-shadow: 0 4px 16px rgba(56, 189, 248, 0.2); }
.showcase-card.brand-cursor::before { background: #38bdf8; }

.showcase-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.showcase-card-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ====================================================================
   通用排版与多彩特性卡片 Features (4卡多色相)
   ==================================================================== */

.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background-color: rgba(11, 17, 32, 0.4);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-kicker {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #38bdf8;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.35rem;
  }
}

/* Bento-Grid 风格特性卡 (4卡多彩) */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  opacity: 0.7;
}

.feature-box:hover {
  transform: translateY(-4px);
  background-color: var(--bg-card-hover);
}

/* 4大特性多彩卡片分别赋予独特光色 */
.feature-box.color-cyan::before { background: var(--gradient-cyber); }
.feature-box.color-cyan .feature-icon {
  background: rgba(6, 182, 212, 0.15);
  color: #06b6d4;
  border-color: rgba(6, 182, 212, 0.3);
}
.feature-box.color-cyan:hover {
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 10px 24px rgba(6, 182, 212, 0.18);
}

.feature-box.color-blue::before { background: var(--gradient-aurora); }
.feature-box.color-blue .feature-icon {
  background: rgba(59, 130, 246, 0.15);
  color: #3b82f6;
  border-color: rgba(59, 130, 246, 0.3);
}
.feature-box.color-blue:hover {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 10px 24px rgba(59, 130, 246, 0.18);
}

.feature-box.color-violet::before { background: var(--gradient-violet); }
.feature-box.color-violet .feature-icon {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border-color: rgba(168, 85, 247, 0.3);
}
.feature-box.color-violet:hover {
  border-color: rgba(168, 85, 247, 0.4);
  box-shadow: 0 10px 24px rgba(168, 85, 247, 0.18);
}

.feature-box.color-amber::before { background: var(--gradient-sunset); }
.feature-box.color-amber .feature-icon {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.3);
}
.feature-box.color-amber:hover {
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 10px 24px rgba(245, 158, 11, 0.18);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  font-weight: 700;
  transition: transform 0.3s ease;
}

.feature-box:hover .feature-icon {
  transform: scale(1.08);
}

.feature-box-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-box-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.64;
}

/* ====================================================================
   使用场景卡 Scenarios (4卡多样色彩与设备标签)
   ==================================================================== */

.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 640px) {
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.scene-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  backdrop-filter: blur(10px);
}

.scene-card:hover {
  border-color: var(--border-glow-blue);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.scene-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.scene-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.scene-title-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.scene-device-tag {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: #38bdf8;
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 500;
}

.scene-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ====================================================================
   定价方案区 Pricing (3档位：白领推荐档位高能光晕)
   ==================================================================== */

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
}

@media (min-width: 900px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(10px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
}

.pricing-card.featured {
  border-color: #3b82f6;
  background: linear-gradient(180deg, rgba(29, 78, 216, 0.18) 0%, rgba(15, 23, 42, 0.95) 100%);
  box-shadow: 0 0 35px rgba(59, 130, 246, 0.3);
  transform: translateY(-8px);
}

.pricing-card.featured:hover {
  box-shadow: 0 0 45px rgba(59, 130, 246, 0.45);
  transform: translateY(-10px);
}

.badge-featured {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-aurora);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.5);
  white-space: nowrap;
}

.pricing-audience {
  font-size: 0.85rem;
  font-weight: 600;
  color: #38bdf8;
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.pricing-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
}

.pricing-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
}

.pricing-amount {
  font-size: 2.7rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

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

.pricing-specs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-spec-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-body);
}

.pricing-spec-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: #38bdf8;
}

/* ====================================================================
   优势保障 Benefits
   ==================================================================== */

.benefits-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 768px) {
  .benefits-row {
    grid-template-columns: repeat(3, 1fr);
  }
}

.benefit-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  transition: all 0.25s ease;
  backdrop-filter: blur(10px);
}

.benefit-item:hover {
  border-color: var(--border-glow-cyan);
  transform: translateY(-3px);
}

.benefit-item h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

.benefit-item p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* ====================================================================
   FAQ 手风琴
   ==================================================================== */

.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.2s ease;
  backdrop-filter: blur(10px);
}

.faq-item.is-open {
  border-color: var(--border-glow-blue);
  background-color: var(--bg-card-hover);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  gap: 14px;
}

.faq-question:hover {
  color: #38bdf8;
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.25s ease, color 0.25s ease;
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
  color: #38bdf8;
}

.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.is-open .faq-answer {
  display: block;
}

/* ====================================================================
   Final CTA 区域 (星云极光渐变与高能召唤)
   ==================================================================== */

.final-cta-section {
  padding: 80px 0;
  background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.25) 0%, rgba(139, 92, 246, 0.12) 50%, rgba(7, 10, 18, 0.9) 100%);
  border-top: 1px solid var(--border-glow-blue);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.final-cta-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 32px;
}

/* ====================================================================
   页脚 Footer
   ==================================================================== */

.site-footer {
  background-color: #05070d;
  border-top: 1px solid var(--border-color);
  padding: 55px 0 35px;
  position: relative;
  z-index: 1;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

@media (min-width: 768px) {
  .footer-top {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 14px;
  line-height: 1.65;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.footer-col-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-col-links a:hover {
  color: #38bdf8;
}

.footer-bottom {
  padding-top: 26px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dark);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ====================================================================
   移动端吸底 CTA
   ==================================================================== */

.mobile-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background-color: rgba(11, 17, 32, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-glow-cyan);
  padding: 10px 16px;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transform: translateY(100%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-sticky-cta.is-visible {
  transform: translateY(0);
}

.sticky-info {
  flex-grow: 1;
}

.sticky-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
}

.sticky-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (min-width: 769px) {
  .mobile-sticky-cta {
    display: none !important;
  }
}

/* ====================================================================
   内容页专用样式（文章、关于、条款等）
   ==================================================================== */

.page-header {
  padding: 48px 0 36px;
  background-color: rgba(15, 23, 42, 0.3);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: #38bdf8;
}

.page-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

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

.page-layout {
  padding: 48px 0 75px;
}

.article-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 34px 26px;
  max-width: 860px;
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

@media (min-width: 768px) {
  .article-content {
    padding: 50px 44px;
  }
}

/* 文章正文排版 (Prose) */
.prose {
  font-size: 1.02rem;
  line-height: 1.76;
  color: #cbd5e1;
}

.prose p {
  margin-bottom: 1.4em;
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-top: 2em;
  margin-bottom: 0.8em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: -0.01em;
}

.prose h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: #f1f5f9;
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}

.prose ul, .prose ol {
  margin-bottom: 1.4em;
  padding-left: 1.5em;
}

.prose li {
  margin-bottom: 0.5em;
}

.prose blockquote {
  border-left: 4px solid var(--color-cyan);
  background: linear-gradient(90deg, rgba(6, 182, 212, 0.12) 0%, rgba(15, 23, 42, 0.6) 100%);
  border: 1px solid var(--border-glow-cyan);
  border-left-width: 4px;
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.6em 0;
  color: #e2e8f0;
  font-size: 0.95rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 0.92rem;
}

.prose th, .prose td {
  border: 1px solid var(--border-color);
  padding: 12px 14px;
  text-align: left;
}

.prose th {
  background-color: rgba(255, 255, 255, 0.05);
  font-weight: 700;
  color: #ffffff;
}

.prose td {
  color: var(--text-body);
}

.prose strong {
  color: #ffffff;
}

.prose code {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  color: #38bdf8;
  font-family: var(--font-mono);
}

/* 文章末尾 CTA 卡片 */
.article-cta-box {
  margin-top: 40px;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.15) 0%, rgba(15, 23, 42, 0.85) 100%);
  border: 1px solid var(--border-glow-blue);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.article-cta-box p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* 站内互链卡片 */
.article-links-box {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.article-links-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}

.article-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-links-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  color: var(--text-muted);
}

.article-links-list a:hover {
  color: #38bdf8;
}

/* 列表展示页（zhinan.html 指南汇总） */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 640px) {
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .guides-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.guide-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(10px);
}

.guide-item-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-glow-blue);
  background-color: var(--bg-card-hover);
}

.guide-item-tag {
  align-self: flex-start;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: #38bdf8;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid var(--border-glow-cyan);
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.guide-item-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.35;
}

.guide-item-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.guide-item-meta {
  font-size: 0.8rem;
  color: var(--text-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}