/* ==========================================================================
   龙猫云 LongMaoYun - 晶体生长 · 晶云锦跃 · 晶体科技 专用样式表
   配色：#0F0524 暗紫黑 | #A855F7 晶体紫 | #FCD34D 生长黄 | #FFFFFF 白色
   ========================================================================== */

/* 采用免外部 HTTP 阻塞的高性能现代系统字体栈，秒开即显 */

:root {
  --bg-primary: #0F0524;
  --bg-secondary: #170B36;
  --bg-card: rgba(23, 11, 48, 0.72);
  --bg-card-hover: rgba(36, 17, 74, 0.85);
  
  --primary: #A855F7;
  --primary-glow: rgba(168, 85, 247, 0.6);
  --primary-light: #C084FC;
  
  --secondary: #FCD34D;
  --secondary-glow: rgba(252, 211, 77, 0.8);
  --secondary-light: #FDE68A;
  
  --border-color: rgba(168, 85, 247, 0.22);
  --border-hover: rgba(252, 211, 77, 0.55);
  
  --text-main: #FFFFFF;
  --text-muted: rgba(255, 255, 255, 0.65);
  --text-dim: rgba(255, 255, 255, 0.45);
  
  --gradient-brand: linear-gradient(135deg, #A855F7 0%, #D8B4FE 50%, #FCD34D 100%);
  --gradient-btn: linear-gradient(135deg, #A855F7 0%, #7E22CE 60%, #6B21A8 100%);
  --gradient-card: linear-gradient(180deg, rgba(168, 85, 247, 0.08) 0%, rgba(23, 11, 48, 0.8) 100%);
  
  --radius-sm: 8px;
  --radius-btn: 12px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  
  --shadow-card: 0 12px 35px -10px rgba(0, 0, 0, 0.6);
  --shadow-btn-purple: 0 0 30px rgba(168, 85, 247, 0.6);
  --shadow-btn-yellow: 0 0 35px rgba(252, 211, 77, 0.8);
  
  --container-max: 1220px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置与排版规范 */
*, *::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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--text-main);
  position: relative;
  overflow-x: hidden;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* ================= 无障碍增强：跳转到主要内容 (Skip Link) ================= */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--primary);
  color: #FFFFFF;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 10001;
  text-decoration: none;
  transition: top 0.2s ease-in-out;
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.6);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 20px;
  outline: 3px solid var(--secondary);
  outline-offset: 3px;
}

/* ================= 无障碍增强：全局键盘焦点状态 ================= */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
details:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 3px;
}

/* ================= 锚点防遮挡偏移 (适配 72px 悬浮导航条) ================= */
section[id],
div[id],
article[id] {
  scroll-margin-top: 92px;
}

/* ================= 减弱动效偏好 (prefers-reduced-motion) ================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .crystal-cluster-3d,
  .orbit-circle,
  .totoro-silhouette,
  .lattice-growth-line,
  .crystal-particle {
    animation: none !important;
  }
}

/* ================= 晶场背景动效组件 ================= */
.crystal-field-wrapper {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* 左右对称径向渐变（紫/黄晶场感） */
.crystal-glow-left {
  position: absolute;
  width: 750px;
  height: 750px;
  left: -240px;
  top: 10%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.24) 0%, rgba(168, 85, 247, 0.08) 45%, transparent 70%);
  border-radius: 50%;
  filter: blur(50px);
}

.crystal-glow-right {
  position: absolute;
  width: 750px;
  height: 750px;
  right: -240px;
  top: 15%;
  background: radial-gradient(circle, rgba(252, 211, 77, 0.18) 0%, rgba(252, 211, 77, 0.05) 50%, transparent 72%);
  border-radius: 50%;
  filter: blur(50px);
}

/* 细网格覆盖（边缘渐隐） */
.crystal-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(168, 85, 247, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 85, 247, 0.07) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 1) 30%, rgba(0, 0, 0, 0) 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 1) 30%, rgba(0, 0, 0, 0) 80%);
}

/* 3条垂直晶格生长线 SVG（紫色虚线，dashoffset 流动动画） */
.crystal-lattice-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.lattice-growth-line {
  stroke: rgba(168, 85, 247, 0.45);
  stroke-width: 1.5;
  stroke-dasharray: 8 10;
  animation: latticeDashGrowth 12s linear infinite;
}

.lattice-line-1 { animation-duration: 10s; }
.lattice-line-2 { animation-duration: 14s; stroke: rgba(252, 211, 77, 0.35); }
.lattice-line-3 { animation-duration: 12s; }

@keyframes latticeDashGrowth {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -200; }
}

/* 4个紫/黄粒子从底部上升带横向漂移 */
.crystal-particle {
  position: absolute;
  bottom: -40px;
  border-radius: 50%;
  filter: blur(1px);
  pointer-events: none;
}

.particle-1 {
  left: 18%;
  width: 8px;
  height: 8px;
  background: #A855F7;
  box-shadow: 0 0 14px #A855F7;
  animation: floatUpDrift1 14s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.particle-2 {
  left: 42%;
  width: 10px;
  height: 10px;
  background: #FCD34D;
  box-shadow: 0 0 16px #FCD34D;
  animation: floatUpDrift2 18s cubic-bezier(0.4, 0, 0.2, 1) infinite 2s;
}

.particle-3 {
  left: 68%;
  width: 7px;
  height: 7px;
  background: #C084FC;
  box-shadow: 0 0 14px #A855F7;
  animation: floatUpDrift3 16s cubic-bezier(0.4, 0, 0.2, 1) infinite 4s;
}

.particle-4 {
  left: 85%;
  width: 9px;
  height: 9px;
  background: #FCD34D;
  box-shadow: 0 0 16px #FCD34D;
  animation: floatUpDrift4 20s cubic-bezier(0.4, 0, 0.2, 1) infinite 6s;
}

@keyframes floatUpDrift1 {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  15% { opacity: 0.85; }
  50% { transform: translateY(-55vh) translateX(35px); }
  85% { opacity: 0.85; }
  100% { transform: translateY(-110vh) translateX(-25px); opacity: 0; }
}

@keyframes floatUpDrift2 {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  15% { opacity: 0.9; }
  50% { transform: translateY(-60vh) translateX(-45px); }
  85% { opacity: 0.9; }
  100% { transform: translateY(-115vh) translateX(30px); opacity: 0; }
}

@keyframes floatUpDrift3 {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  15% { opacity: 0.8; }
  50% { transform: translateY(-50vh) translateX(40px); }
  85% { opacity: 0.8; }
  100% { transform: translateY(-110vh) translateX(-35px); opacity: 0; }
}

@keyframes floatUpDrift4 {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  15% { opacity: 0.85; }
  50% { transform: translateY(-55vh) translateX(-30px); }
  85% { opacity: 0.85; }
  100% { transform: translateY(-115vh) translateX(40px); opacity: 0; }
}

/* ================= 排版与基础组件 ================= */
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section {
  padding: 80px 0;
  position: relative;
  z-index: 2;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.35);
  border-radius: var(--radius-full);
  color: var(--secondary-light);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

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

/* ================= CTA 按钮（严格规范） ================= */
/* 紫色渐变按钮，圆角 12px，带 30px 紫色辉光，hover 时辉光变黄 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-btn); /* 严格 12px */
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  min-height: 48px;
  user-select: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #FFFFFF;
  border: 1px solid rgba(252, 211, 77, 0.25);
  box-shadow: 0 0 30px rgba(168, 85, 247, 0.6); /* 30px 紫色辉光 */
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(252, 211, 77, 0.85); /* hover 时辉光变黄 */
  border-color: #FCD34D;
  color: #FFFDF0;
}

.btn-secondary {
  background: rgba(23, 11, 48, 0.8);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(36, 17, 74, 0.9);
  border-color: var(--secondary);
  box-shadow: 0 0 25px rgba(252, 211, 77, 0.4);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.92rem;
  min-height: 44px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
  min-height: 54px;
}

.btn-block {
  width: 100%;
}

/* ================= 导航条 ================= */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 5, 36, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  height: 74px;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.5px;
}

.brand-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #A855F7 0%, #FCD34D 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(168, 85, 247, 0.6);
  color: #0F0524;
}

.brand-logo span span {
  color: var(--secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-link:hover {
  color: #FFFFFF;
  text-shadow: 0 0 10px rgba(168, 85, 247, 0.6);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ================= 主视觉区 (Hero Section) ================= */
.hero-section {
  padding: 80px 0 60px 0;
  position: relative;
  z-index: 2;
}

.hero-grid-wrapper {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.4);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--secondary);
  margin-bottom: 24px;
}

/* 大标题：Space Grotesk 700 + 紫到黄渐变 + 双层文字阴影 */
.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: clamp(2.3rem, 4.2vw, 3.8rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-title-gradient {
  background: linear-gradient(135deg, #A855F7 0%, #D8B4FE 45%, #FCD34D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 
    0 0 25px rgba(168, 85, 247, 0.55),
    0 0 50px rgba(252, 211, 77, 0.35);
  filter: drop-shadow(0 4px 16px rgba(168, 85, 247, 0.4));
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.7;
  margin-bottom: 34px;
}

.hero-subtitle strong {
  color: #FFFFFF;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.hero-highlights {
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.highlight-item svg {
  color: var(--secondary);
}

/* ================= 右侧动画容器 (340×340px 多面体晶体簇 + 龙猫剪影) ================= */
.crystal-animation-container {
  width: 340px;
  height: 340px;
  position: relative;
  background: rgba(23, 11, 48, 0.5);
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: 
    0 0 30px rgba(168, 85, 247, 0.25),
    inset 0 0 25px rgba(252, 211, 77, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 900px;
  overflow: hidden;
  user-select: none;
}

/* 4个角落叠加等宽字体数据标签 */
.corner-tag {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--secondary);
  letter-spacing: 0.5px;
  padding: 4px 6px;
  background: rgba(15, 5, 36, 0.7);
  border-radius: 4px;
  border: 1px solid rgba(252, 211, 77, 0.25);
  z-index: 10;
}
.tag-top-left { top: 12px; left: 12px; }
.tag-top-right { top: 12px; right: 12px; }
.tag-bottom-left { bottom: 12px; left: 12px; }
.tag-bottom-right { bottom: 12px; right: 12px; }

/* 2层虚线圆轨道（紫/黄）反向旋转 */
.orbit-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.orbit-purple {
  transform-origin: center center;
  animation: orbitRotateCw 22s linear infinite;
}

.orbit-yellow {
  transform-origin: center center;
  animation: orbitRotateCcw 16s linear infinite;
}

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

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

/* 3D 旋转多面体晶体簇 (Y+Z 轴 360° 同时旋转 18秒) */
.crystal-cluster-stage {
  width: 220px;
  height: 220px;
  position: relative;
  transform-style: preserve-3d;
  animation: crystalRotateYZ 18s linear infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 16px rgba(168, 85, 247, 0.7)) drop-shadow(0 0 32px rgba(252, 211, 77, 0.45));
}

@keyframes crystalRotateYZ {
  0% { transform: rotateY(0deg) rotateZ(0deg); }
  100% { transform: rotateY(360deg) rotateZ(360deg); }
}

/* 5个晶面多边形组成柱状晶体，紫/黄半透明填充，节奏闪烁 */
.crystal-facet {
  stroke-width: 1.2;
  transition: opacity 0.5s ease;
}

.facet-1 {
  fill: url(#crystalGradPurple);
  stroke: #C084FC;
  animation: facetPulse1 3.5s ease-in-out infinite;
}

.facet-2 {
  fill: url(#crystalGradYellow);
  stroke: #FCD34D;
  animation: facetPulse2 4s ease-in-out infinite 0.5s;
}

.facet-3 {
  fill: url(#crystalGradMix);
  stroke: #E879F9;
  animation: facetPulse3 3.8s ease-in-out infinite 1s;
}

.facet-4 {
  fill: rgba(168, 85, 247, 0.45);
  stroke: #A855F7;
  animation: facetPulse1 4.2s ease-in-out infinite 1.5s;
}

.facet-5 {
  fill: rgba(252, 211, 77, 0.4);
  stroke: #FCD34D;
  animation: facetPulse2 3.6s ease-in-out infinite 2s;
}

@keyframes facetPulse1 {
  0%, 100% { opacity: 0.65; }
  50% { opacity: 0.95; }
}

@keyframes facetPulse2 {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 0.9; }
}

@keyframes facetPulse3 {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

/* 4个发光顶点节点 (紫/黄) */
.crystal-vertex-node {
  filter: drop-shadow(0 0 6px currentColor);
}

/* 晶体中心 100×62px 龙猫剪影 SVG (晶跃动画：上下浮动 + 缩放 3秒周期 + 双层辉光) */
.totoro-silhouette-wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100px;
  height: 62px;
  margin-top: -31px;
  margin-left: -50px;
  z-index: 5;
  pointer-events: none;
  animation: totoroLeap 3s ease-in-out infinite;
  filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.9)) drop-shadow(0 0 24px rgba(252, 211, 77, 0.7));
}

@keyframes totoroLeap {
  0%, 100% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-12px) scale(1.08);
  }
}

/* ================= 实时网络监控模拟仪表卡片 ================= */
.network-status-bar {
  margin: 20px auto 0 auto;
  max-width: 100%;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.status-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--secondary);
  font-weight: 600;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background: var(--secondary);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--secondary);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.node-item {
  background: rgba(15, 5, 36, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-align: left;
}

.node-location {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 6px;
}

.node-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.node-ping {
  color: var(--secondary);
  font-weight: 700;
}

/* ================= 核心优势 3大卡片 ================= */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 0 35px rgba(168, 85, 247, 0.35);
}

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

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
  margin-bottom: 24px;
}

.feature-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #FFFFFF;
}

.feature-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-checklist {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.feature-checklist svg {
  color: var(--secondary);
  flex-shrink: 0;
}

/* ================= 流媒体与 AI 支持 ================= */
.media-ai-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(14px);
  transition: var(--transition);
}

.media-ai-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 0 30px rgba(168, 85, 247, 0.25);
}

.media-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.media-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(252, 211, 77, 0.12);
  border: 1px solid rgba(252, 211, 77, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
}

.media-card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
}

.media-card-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.media-badge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 24px 0;
}

.badge-item {
  background: rgba(15, 5, 36, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
  transition: var(--transition);
}

.badge-item:hover {
  background: rgba(36, 17, 74, 0.8);
  border-color: var(--secondary);
}

.badge-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #FFFFFF;
  margin-bottom: 2px;
}

.badge-detail {
  font-size: 0.75rem;
  color: var(--secondary);
}

.service-meta-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(252, 211, 77, 0.4);
  box-shadow: 0 0 30px rgba(168, 85, 247, 0.3);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(168, 85, 247, 0.22) 0%, rgba(23, 11, 48, 0.95) 100%);
  border: 1.5px solid var(--secondary);
  box-shadow: 0 0 35px rgba(252, 211, 77, 0.35);
  transform: scale(1.03);
  z-index: 2;
}

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

.featured-pill {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #FCD34D 0%, #F59E0B 100%);
  color: #0F0524;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(252, 211, 77, 0.6);
}

.plan-header {
  margin-bottom: 24px;
}

.plan-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 6px;
}

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

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 20px 0 24px 0;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--secondary);
}

.price-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3.2rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
}

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

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

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

.plan-feature-item svg {
  flex-shrink: 0;
  color: var(--secondary);
}

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

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

.review-card:hover {
  border-color: rgba(252, 211, 77, 0.4);
  transform: translateY(-4px);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: var(--secondary);
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(168, 85, 247, 0.25);
  border: 1px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--secondary);
  font-size: 1rem;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #FFFFFF;
}

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

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

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

.faq-item:hover {
  border-color: rgba(252, 211, 77, 0.4);
}

.faq-question {
  padding: 22px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

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

details[open] .faq-icon {
  transform: rotate(180deg);
}

details[open] .faq-question {
  border-bottom: 1px solid var(--border-color);
}

.faq-answer {
  padding: 20px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  background: rgba(15, 5, 36, 0.5);
}

/* ================= 页底 CTA 横幅 ================= */
.cta-banner-section {
  padding: 60px 0 80px 0;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.25) 0%, rgba(252, 211, 77, 0.12) 100%), var(--bg-secondary);
  border: 1px solid rgba(168, 85, 247, 0.4);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  box-shadow: 0 0 45px rgba(168, 85, 247, 0.35);
}

.cta-banner h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 16px;
  color: #FFFFFF;
}

.cta-banner p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 32px auto;
}

/* ================= 极简规范页脚 ================= */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: rgba(15, 5, 36, 0.95);
  padding: 40px 0 30px 0;
  position: relative;
  z-index: 2;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.footer-link {
  color: var(--text-muted);
  font-size: 0.98rem;
  font-weight: 600;
  transition: var(--transition);
  padding: 6px 10px;
}

.footer-link:hover {
  color: var(--secondary);
  text-shadow: 0 0 10px rgba(252, 211, 77, 0.5);
  text-decoration: underline;
  text-underline-offset: 6px;
}

.footer-copyright {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid rgba(168, 85, 247, 0.1);
  padding-top: 20px;
}

/* ================= 子页面基础布局 (About, Terms, Privacy, Sitemap, Wiki) ================= */
.subpage-hero {
  padding: 60px 0 40px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: rgba(23, 11, 48, 0.4);
}

.subpage-body {
  padding: 60px 0 100px 0;
  max-width: 900px;
  margin: 0 auto;
}

.subpage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px;
  margin-bottom: 30px;
}

.subpage-card h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.subpage-card p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.subpage-card ul {
  list-style: disc;
  padding-left: 24px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.subpage-card li {
  margin-bottom: 8px;
  line-height: 1.6;
}

/* ================= 响应式媒体查询 @media ================= */
@media (max-width: 1024px) {
  .hero-grid-wrapper {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-highlights {
    justify-content: center;
  }
  
  .advantages-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .node-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-section {
    padding: 50px 0 40px 0;
  }
  
  .crystal-animation-container {
    width: 300px;
    height: 300px;
  }
  
  .advantages-grid,
  .media-ai-container,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .media-badge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .node-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
    min-height: 50px;
  }
  
  .hero-highlights {
    gap: 14px;
    flex-direction: column;
    align-items: center;
  }
  
  .footer-nav {
    gap: 20px;
  }
  
  .footer-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
  }
  
  .subpage-card {
    padding: 24px 20px;
  }
  
  .cta-banner {
    padding: 40px 20px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .crystal-animation-container {
    width: 280px;
    height: 280px;
  }
  
  .media-badge-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
  
  .btn {
    width: 100%;
  }
}

/* ==========================================================================
   知识科普 SEO 9大长文专栏增强样式
   ========================================================================== */

.seo-hub-intro {
  margin-bottom: 40px;
}

.article-quick-directory {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  margin-bottom: 50px;
  box-shadow: var(--shadow-card);
}

.directory-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.directory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.dir-item {
  background: rgba(15, 5, 36, 0.65);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 8px;
  transition: var(--transition);
}

.dir-item:hover {
  border-color: var(--secondary);
  transform: translateY(-3px);
  background: rgba(36, 17, 74, 0.85);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
}

.dir-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--secondary);
  font-weight: 700;
}

.dir-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: #FFFFFF;
  line-height: 1.45;
}

.dir-meta {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* SEO 长文章卡片 */
.seo-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px 38px;
  margin-bottom: 48px;
  scroll-margin-top: 100px;
  position: relative;
  transition: var(--transition);
}

.seo-article-card:hover {
  border-color: rgba(168, 85, 247, 0.45);
  box-shadow: 0 0 35px rgba(168, 85, 247, 0.25);
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
  margin-bottom: 28px;
}

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--secondary);
  background: rgba(252, 211, 77, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.article-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.35;
  margin-bottom: 14px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

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

.article-body {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.8;
}

.article-body h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  margin: 32px 0 14px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-body p {
  margin-bottom: 16px;
  text-align: justify;
}

.article-body ul, .article-body ol {
  margin: 14px 0 20px 20px;
  list-style: disc;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.article-body strong {
  color: #FFFFFF;
  font-weight: 600;
}

.article-body blockquote {
  background: rgba(15, 5, 36, 0.6);
  border-left: 3px solid var(--secondary);
  padding: 14px 20px;
  margin: 20px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: normal;
  color: #E2E8F0;
  font-size: 0.95rem;
}

/* 内链高亮样式 */
.internal-link {
  color: var(--secondary);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 600;
  transition: var(--transition);
}

.internal-link:hover {
  color: #FFFFFF;
  text-shadow: 0 0 10px rgba(252, 211, 77, 0.8);
}

/* 文章内置转化引导条 */
.in-article-cta {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.15) 0%, rgba(252, 211, 77, 0.1) 100%);
  border: 1px solid rgba(168, 85, 247, 0.35);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.in-article-cta-text h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.in-article-cta-text p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

@media (max-width: 1024px) {
  .directory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .directory-grid {
    grid-template-columns: 1fr;
  }
  .seo-article-card {
    padding: 28px 20px;
  }
  .in-article-cta {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  .in-article-cta .btn {
    width: 100%;
  }
}

/* ==========================================================================
   网站地图 Sitemap 专用增强布局
   ========================================================================== */

.sitemap-container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.sitemap-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.sitemap-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.sitemap-card:hover {
  border-color: rgba(168, 85, 247, 0.45);
  box-shadow: 0 0 35px rgba(168, 85, 247, 0.25);
  transform: translateY(-3px);
}

.sitemap-card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 14px;
}

.sitemap-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex-grow: 1;
}

.sitemap-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sitemap-item-link {
  font-size: 0.98rem;
  font-weight: 600;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.sitemap-item-link:hover {
  color: var(--secondary);
  transform: translateX(4px);
}

.sitemap-item-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  padding-left: 18px;
}

.sitemap-badge-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--secondary);
  background: rgba(252, 211, 77, 0.12);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(252, 211, 77, 0.25);
}

@media (max-width: 960px) {
  .sitemap-grid-2x2 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ==========================================================================
   文章内置 FAQ 专用晶体样式
   ========================================================================== */

.article-faq-section {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px dashed rgba(168, 85, 247, 0.3);
}

.article-faq-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-item {
  background: rgba(15, 5, 36, 0.6);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.article-faq-item:hover {
  border-color: rgba(252, 211, 77, 0.4);
}

.article-faq-q {
  padding: 12px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  background: rgba(168, 85, 247, 0.08);
}

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

.article-faq-q .faq-arrow {
  color: var(--secondary);
  font-size: 0.8rem;
  transition: transform 0.2s ease;
}

details[open] .article-faq-q .faq-arrow {
  transform: rotate(180deg);
}

details[open] .article-faq-q {
  border-bottom: 1px solid rgba(168, 85, 247, 0.2);
}

.article-faq-a {
  padding: 14px 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  background: rgba(15, 5, 36, 0.4);
}