/* ==========================================================================
   山水云 ShanShuiYun - 全息山网 + 数据水墨 + 赛博科技 样式表 (Pure CSS)
   固定排版结构不变，应用深空黑 #020617 + 山青绿 #10B981 + 水墨青 #06B6D4
   ========================================================================== */

:root {
  --bg-dark: #020617;
  --bg-card: rgba(2, 12, 27, 0.78);
  --bg-card-hover: rgba(6, 22, 46, 0.9);
  --bg-surface: rgba(2, 6, 23, 0.82);
  --text-main: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.74);
  --text-muted: rgba(255, 255, 255, 0.62);
  --primary: #10B981;       /* 山青绿 */
  --secondary: #06B6D4;     /* 水墨青 */
  --accent: #10B981;
  --gradient-brand: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
  --border-color: rgba(16, 185, 129, 0.22);
  --border-highlight: rgba(6, 182, 212, 0.55);
  --shadow-lg: 0 20px 45px -15px rgba(0, 0, 0, 0.85);
  --shadow-glow: 0 0 24px rgba(16, 185, 129, 0.35);
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --container-width: 1180px;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Mono", Consolas, "Courier New", monospace;
  --font-sans: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  overflow-wrap: break-word;
  word-wrap: break-word;
  position: relative;
}

/* 跳转到主要内容 (Skip Link) 键盘无障碍入口 */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 999;
  padding: 10px 18px;
  background: #020617;
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.92rem;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 14px;
  outline: 2px solid #FFFFFF;
  outline-offset: 2px;
}

/* 清晰的键盘焦点样式 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 固定页眉防遮挡锚点标题 */
section[id],
article[id],
[id^="seo-post-"] {
  scroll-margin-top: 88px;
}

h1,
.hero h1 {
  font-family: var(--font-mono);
  font-weight: 700;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.22s ease;
}

ul {
  list-style: none;
}

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

/* ==========================================================================
   全屏背景动效 (全息透视网格 + 扫描线纹理 + 3条垂直青线 + 2个绿/青光晕)
   ========================================================================== */
.cyber-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background-color: #020617;
  perspective: 650px;
}

/* 2个绿/青大型 blur 光晕缓慢漂移和缩放 */
.cyber-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.26;
  will-change: transform;
}

.cyber-orb-green {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, #10B981 0%, transparent 70%);
  top: -10%;
  left: 8%;
  animation: orbFloatGreen 16s ease-in-out infinite alternate;
}

.cyber-orb-cyan {
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, #06B6D4 0%, transparent 70%);
  bottom: -12%;
  right: 6%;
  animation: orbFloatCyan 19s ease-in-out infinite alternate;
}

@keyframes orbFloatGreen {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(90px, 60px) scale(1.18); }
  100% { transform: translate(-40px, 110px) scale(0.92); }
}

@keyframes orbFloatCyan {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-100px, -70px) scale(1.22); }
  100% { transform: translate(50px, -110px) scale(0.9); }
}

/* 全屏全息网格（perspective 透视效果从中心向外延伸，12 秒一周期向前流动） */
.holo-grid-plane {
  position: absolute;
  inset: -60%;
  background-image:
    linear-gradient(to right, rgba(16, 185, 129, 0.16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(6, 182, 212, 0.16) 1px, transparent 1px);
  background-size: 64px 64px;
  transform-origin: center center;
  transform: rotateX(62deg) translateZ(-120px);
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.95) 15%, rgba(0,0,0,0.2) 65%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.95) 15%, rgba(0,0,0,0.2) 65%, transparent 85%);
  animation: holoGridFlow 12s linear infinite;
}

@keyframes holoGridFlow {
  0% {
    background-position: 0 0, 0 0;
    transform: rotateX(62deg) translateY(0) scale(1);
  }
  100% {
    background-position: 0 640px, 0 640px;
    transform: rotateX(62deg) translateY(64px) scale(1.06);
  }
}

/* 叠加细密扫描线纹理 */
.scanline-texture {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(6, 182, 212, 0.035) 3px,
    rgba(2, 6, 23, 0.22) 4px
  );
}

/* 3 条垂直青色细线从顶部缓慢扫到底部（6 秒一周期，错开延迟） */
.v-scan-line {
  position: absolute;
  top: -35%;
  width: 1px;
  height: 35%;
  background: linear-gradient(to bottom, transparent 0%, rgba(6, 182, 212, 0.85) 75%, #10B981 100%);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.8);
  animation: verticalSweep 6s linear infinite;
}

.v-scan-line.line-1 {
  left: 20%;
  animation-delay: 0s;
}

.v-scan-line.line-2 {
  left: 52%;
  animation-delay: 2s;
}

.v-scan-line.line-3 {
  left: 82%;
  animation-delay: 4s;
}

@keyframes verticalSweep {
  0% { top: -35%; opacity: 0; }
  15% { opacity: 0.9; }
  85% { opacity: 0.9; }
  100% { top: 115%; opacity: 0; }
}

/* ==========================================================================
   顶部导航栏
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(2, 6, 23, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
  color: #FFFFFF;
  text-shadow: 0 0 12px rgba(16, 185, 129, 0.45);
}

.brand-logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand-en {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  margin-left: 6px;
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--primary);
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

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

/* ==========================================================================
   CTA 按钮规范：绿色描边按钮（无填充），hover 填充绿色 + 文字变黑，圆角 4px，等宽字体
   ========================================================================== */
.btn,
.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 24px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  background: transparent;
  color: #10B981;
  border: 1px solid #10B981;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.16), inset 0 0 8px rgba(16, 185, 129, 0.08);
  transition: all 0.22s ease;
  text-align: center;
}

.btn-outline {
  border-color: #06B6D4;
  color: #06B6D4;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.14);
}

.btn:hover,
.btn-primary:hover,
.btn-outline:hover {
  background: #10B981;
  border-color: #10B981;
  color: #020617;
  box-shadow: 0 0 24px rgba(16, 185, 129, 0.65);
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(1px);
}

.btn-lg {
  min-height: 52px;
  padding: 13px 30px;
  font-size: 1.02rem;
  border-radius: 4px;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   主视觉区 (Hero Section) - 保持既有双栏排版结构
   ========================================================================== */
.hero {
  padding: 76px 0 68px;
  position: relative;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 22px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
}

/* 左侧：H1「山水云」使用 JetBrains Mono 等宽字体，700字重，文字带绿色发光阴影 */
.hero h1 {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 2.95rem;
  line-height: 1.24;
  letter-spacing: -0.5px;
  color: #FFFFFF;
  text-shadow: 0 0 18px rgba(16, 185, 129, 0.72), 0 0 38px rgba(6, 182, 212, 0.35);
  margin-bottom: 18px;
}

.text-gradient {
  color: #10B981;
  text-shadow: 0 0 22px rgba(16, 185, 129, 0.9), 0 0 44px rgba(16, 185, 129, 0.45);
}

.hero-subtitle {
  font-size: 1.15rem;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 14px;
  max-width: 620px;
}

.hero-intro {
  font-size: 0.95rem;
  color: var(--text-secondary);
  background: rgba(2, 12, 27, 0.76);
  border-left: 3px solid var(--primary);
  border-top: 1px solid rgba(16, 185, 129, 0.18);
  border-right: 1px solid rgba(16, 185, 129, 0.18);
  border-bottom: 1px solid rgba(16, 185, 129, 0.18);
  padding: 14px 18px;
  border-radius: 0 4px 4px 0;
  margin-bottom: 28px;
  max-width: 620px;
  line-height: 1.7;
}

.hero-intro strong {
  color: var(--primary);
  font-family: var(--font-mono);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 34px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 26px;
  border-top: 1px solid var(--border-color);
}

.metric-item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-shadow: 0 0 12px rgba(16, 185, 129, 0.45);
}

.metric-item span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   右侧动画区（340×340px 全息地球网格 + 雷达扫描 + 双轨道 + 中心山峦剪影 + 4角标签）
   ========================================================================== */
.hero-visual {
  background: rgba(2, 10, 24, 0.85);
  border: 1px solid rgba(16, 185, 129, 0.38);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg), 0 0 32px rgba(16, 185, 129, 0.18);
  position: relative;
}

.holo-stage-wrap {
  position: relative;
  width: 340px;
  height: 340px;
  margin: 6px auto 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 900px;
}

/* 4个角落叠加等宽字体数据标签 */
.holo-corner-tag {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: #10B981;
  letter-spacing: 0.8px;
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.8);
  z-index: 8;
  pointer-events: none;
}

.holo-corner-tag.tag-tl { top: 2px; left: 2px; }
.holo-corner-tag.tag-tr { top: 2px; right: 2px; color: #06B6D4; }
.holo-corner-tag.tag-bl { bottom: 2px; left: 2px; color: #06B6D4; }
.holo-corner-tag.tag-br { bottom: 2px; right: 2px; }

/* 地球内部叠加 conic-gradient 雷达扫描扇区（绿青色，4秒一周期 360° 旋转） */
.holo-radar-sweep {
  position: absolute;
  width: 268px;
  height: 268px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    transparent 260deg,
    rgba(6, 182, 212, 0.12) 300deg,
    rgba(16, 185, 129, 0.42) 355deg,
    rgba(16, 185, 129, 0.7) 360deg
  );
  animation: radarSpin360 4s linear infinite;
  z-index: 2;
  pointer-events: none;
}

@keyframes radarSpin360 {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 2 层虚线圆轨道（绿/青）反向旋转，2 个发光节点沿轨道运行 */
.holo-orbit {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 3;
}

.holo-orbit-outer {
  width: 326px;
  height: 326px;
  border: 1.5px dashed rgba(16, 185, 129, 0.55);
  animation: orbitSpinCW 14s linear infinite;
}

.holo-orbit-inner {
  width: 294px;
  height: 294px;
  border: 1.5px dashed rgba(6, 182, 212, 0.55);
  animation: orbitSpinCCW 10s linear infinite;
}

.orbit-node {
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.orbit-node-green {
  background: #10B981;
  box-shadow: 0 0 12px #10B981, 0 0 22px #10B981;
}

.orbit-node-cyan {
  background: #06B6D4;
  box-shadow: 0 0 12px #06B6D4, 0 0 22px #06B6D4;
}

@keyframes orbitSpinCW {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes orbitSpinCCW {
  0% { transform: rotate(360deg); }
  100% { transform: rotate(0deg); }
}

/* 340×340px 全息地球网格 SVG：整体在 Y 轴 3D 旋转（20秒一周期） */
.holo-globe-3d {
  width: 340px;
  height: 340px;
  transform-style: preserve-3d;
  animation: globeRotateY 20s linear infinite;
  filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.45));
  z-index: 4;
}

@keyframes globeRotateY {
  0% { transform: rotateY(0deg) rotateX(8deg); }
  50% { transform: rotateY(180deg) rotateX(-8deg); }
  100% { transform: rotateY(360deg) rotateX(8deg); }
}

.globe-data-point {
  animation: pointBlink 2s ease-in-out infinite alternate;
}

@keyframes pointBlink {
  0% { opacity: 0.45; r: 3.5px; }
  100% { opacity: 1; r: 5.5px; }
}

/* 中心叠一个 120×80px 的山峦剪影 SVG（带缩放 + 上下浮动脉冲动画 2.5 秒一周期） */
.holo-mountain-center {
  position: absolute;
  width: 120px;
  height: 80px;
  z-index: 6;
  filter: drop-shadow(0 0 16px rgba(16, 185, 129, 0.75));
  animation: mountainPulseFloat 2.5s ease-in-out infinite;
}

@keyframes mountainPulseFloat {
  0%, 100% {
    transform: translateY(0px) scale(1);
    filter: drop-shadow(0 0 14px rgba(16, 185, 129, 0.7));
  }
  50% {
    transform: translateY(-7px) scale(1.07);
    filter: drop-shadow(0 0 24px rgba(6, 182, 212, 0.95));
  }
}

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

.visual-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-pill {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(16, 185, 129, 0.45);
  color: #10B981;
  font-weight: 700;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  background: rgba(6, 182, 212, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.86rem;
}

.node-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 3px;
  background: rgba(6, 182, 212, 0.15);
  color: #06B6D4;
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: #10B981;
}

/* ==========================================================================
   通用章节标题
   ========================================================================== */
.section {
  padding: 80px 0;
  position: relative;
  z-index: 2;
}

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

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 54px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

.section-header h2 {
  font-family: var(--font-mono);
  font-size: 2.15rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.3;
  color: #FFFFFF;
  text-shadow: 0 0 16px rgba(16, 185, 129, 0.35);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.02rem;
}

/* ==========================================================================
   产品核心优势介绍 (3个图文卡片)
   ========================================================================== */
.features-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-md);
  padding: 34px 28px;
  backdrop-filter: blur(10px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 0 28px rgba(16, 185, 129, 0.2);
  background: var(--bg-card-hover);
}

.feature-visual {
  width: 64px;
  height: 64px;
  border-radius: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary);
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.2);
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #FFFFFF;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  margin-bottom: 18px;
}

.feature-points {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.88rem;
  color: #FFFFFF;
}

/* ==========================================================================
   流媒体与 AI 支持图卡
   ========================================================================== */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.media-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(8px);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.media-card:hover {
  border-color: var(--secondary);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.22);
  transform: translateY(-4px);
}

.media-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.media-icon {
  width: 46px;
  height: 46px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.icon-netflix { background: linear-gradient(135deg, #e50914, #7a0006); }
.icon-chatgpt { background: linear-gradient(135deg, #10B981, #047857); }
.icon-youtube { background: linear-gradient(135deg, #ef4444, #991b1b); }
.icon-claude { background: linear-gradient(135deg, #d97757, #9a3412); }
.icon-disney { background: linear-gradient(135deg, #06B6D4, #0369a1); }
.icon-tiktok { background: linear-gradient(135deg, #06B6D4, #10B981); }
.icon-midjourney { background: linear-gradient(135deg, #0ea5e9, #1e40af); }
.icon-spotify { background: linear-gradient(135deg, #10B981, #065f46); }

.unlock-badge {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #10B981;
}

.media-card h3,
.media-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #FFFFFF;
}

.media-card p {
  font-size: 0.87rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   套餐价格对比表 (真实“琴、棋、书、画”四档套餐)
   ========================================================================== */
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-bottom: 48px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(10px);
}

.pricing-card.popular {
  border: 1.5px solid var(--primary);
  box-shadow: var(--shadow-glow);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.1) 0%, var(--bg-card) 100%);
}

.popular-ribbon {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: #10B981;
  color: #020617;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.plan-name {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #FFFFFF;
}

.plan-desc {
  color: var(--text-secondary);
  font-size: 0.86rem;
  margin-bottom: 20px;
  min-height: 44px;
}

.plan-price {
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

.price-currency {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  vertical-align: top;
}

.price-amount {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: #FFFFFF;
  text-shadow: 0 0 14px rgba(16, 185, 129, 0.45);
}

.price-period {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: #FFFFFF;
}

.check-icon {
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 700;
}

/* 参数横向对比明细表 */
.comparison-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 720px;
}

.comparison-table caption {
  padding: 14px 18px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  background: rgba(16, 185, 129, 0.03);
}

.comparison-table th,
.comparison-table td {
  padding: 15px 18px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.92rem;
}

.comparison-table thead th {
  background: rgba(16, 185, 129, 0.06);
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--primary);
}

.comparison-table tbody th {
  color: var(--text-secondary);
  font-weight: 500;
  background: transparent;
  font-family: var(--font-sans);
}

.comparison-table tr:last-child th,
.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table td:first-child {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==========================================================================
   用户评价 (Testimonials)
   ========================================================================== */
.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;
  backdrop-filter: blur(10px);
}

.review-stars {
  color: var(--primary);
  font-size: 1rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.review-text {
  color: #FFFFFF;
  font-size: 0.95rem;
  margin-bottom: 22px;
}

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

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--primary);
}

.author-meta strong {
  display: block;
  font-size: 0.94rem;
  color: #FFFFFF;
}

.author-meta span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   常见问题解答 (6个 FAQ)
   ========================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.02rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
  color: #FFFFFF;
}

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

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 700;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item[open] {
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.15);
}

.faq-answer {
  padding: 14px 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-top: 1px solid rgba(16, 185, 129, 0.15);
}

/* ==========================================================================
   底部横幅 CTA
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(6, 182, 212, 0.12) 100%);
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 52px 36px;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.cta-banner h2 {
  font-family: var(--font-mono);
  font-size: 1.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #FFFFFF;
  text-shadow: 0 0 16px rgba(16, 185, 129, 0.5);
}

.cta-banner p {
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 28px;
  font-size: 1.02rem;
}

/* ==========================================================================
   极简规范页脚 (只保留四个标题，点击打开新页面展示)
   ========================================================================== */
.site-footer {
  background: rgba(2, 6, 23, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 44px 0;
  position: relative;
  z-index: 2;
}

.footer-only-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-only-links a {
  font-family: var(--font-mono);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: 4px;
}

.footer-only-links a:hover {
  color: var(--primary);
  background: rgba(16, 185, 129, 0.1);
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.6);
}

/* ==========================================================================
   独立子页面样式 (网站地图 / 关于我们 / 服务条款 / 隐私政策 / 知识科普)
   ========================================================================== */
.subpage-main {
  padding: 64px 0 96px;
  min-height: calc(100vh - 165px);
  position: relative;
  z-index: 2;
}

.subpage-card {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(12px);
}

.subpage-card h1 {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #FFFFFF;
  text-shadow: 0 0 16px rgba(16, 185, 129, 0.55);
}

.subpage-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
}

.subpage-section {
  margin-bottom: 32px;
}

.subpage-section:last-child {
  margin-bottom: 0;
}

.subpage-section h2 {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.subpage-section p,
.subpage-section li {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 10px;
}

.subpage-section strong {
  color: #FFFFFF;
}

.subpage-section ul {
  padding-left: 20px;
  list-style: disc;
}

/* ==========================================================================
   知识科普页 (kb-7x9m2q.html) 9篇 SEO 专栏文章样式
   ========================================================================== */
.seo-toc-card {
  max-width: 940px;
  margin: 0 auto 36px;
  background: var(--bg-card);
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-glow);
}

.seo-toc-card h1 {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  color: #FFFFFF;
  text-shadow: 0 0 16px rgba(16, 185, 129, 0.55);
  margin-bottom: 10px;
}

.seo-toc-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 22px;
}

.seo-toc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
}

.seo-toc-grid a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.92rem;
  color: #FFFFFF;
  padding: 8px 12px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.seo-toc-grid a:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(16, 185, 129, 0.14);
}

.seo-articles-wrap {
  max-width: 940px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.seo-article {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 40px;
  backdrop-filter: blur(12px);
}

.seo-article:hover {
  border-color: rgba(16, 185, 129, 0.45);
}

.seo-article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 18px;
  margin-bottom: 22px;
}

.seo-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--primary);
  margin-bottom: 10px;
}

.seo-article h2 {
  font-family: var(--font-mono);
  font-size: 1.42rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.4;
  text-shadow: 0 0 12px rgba(16, 185, 129, 0.35);
}

.seo-article h3 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--secondary);
  margin: 20px 0 10px;
}

.seo-article p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.96rem;
  line-height: 1.8;
  margin-bottom: 14px;
}

.seo-article ul {
  padding-left: 20px;
  list-style: disc;
  margin-bottom: 16px;
}

.seo-article li {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 8px;
}

.seo-inline-link {
  color: var(--primary);
  font-weight: 700;
  border-bottom: 1px dashed var(--primary);
}

.seo-inline-link:hover {
  color: var(--secondary);
  border-bottom-color: var(--secondary);
}

.article-faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 14px 0 18px;
}

.article-faq-list .faq-item summary {
  padding: 14px 18px;
  font-size: 0.96rem;
}

.article-faq-list .faq-answer {
  padding: 12px 18px 16px;
  font-size: 0.92rem;
}

.seo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(16, 185, 129, 0.14);
}

.seo-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: #06B6D4;
}

/* 辅助样式类（消除行内 style 属性） */
.nav-links a.nav-link-active {
  color: var(--primary);
  font-weight: 700;
}

.mt-cta {
  margin-top: 16px;
}

/* ==========================================================================
   响应式媒体查询 (@media) - 手机端完美单栏与触控适配
   ========================================================================== */
@media (max-width: 1080px) {
  .pricing-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .features-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .container {
    padding: 0 18px;
  }

  .nav-inner {
    height: auto;
    padding: 14px 0;
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    gap: 10px;
    overflow-x: auto;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    white-space: nowrap;
  }

  .nav-links a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    font-size: 0.88rem;
    padding: 6px 8px;
  }

  .hero {
    padding: 42px 0 40px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

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

  .hero-cta-group .btn {
    width: 100%;
    min-height: 52px;
    font-size: 1.02rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .holo-stage-wrap {
    width: 290px;
    height: 290px;
  }

  .holo-globe-3d {
    width: 290px;
    height: 290px;
  }

  .holo-orbit-outer {
    width: 278px;
    height: 278px;
  }

  .holo-orbit-inner {
    width: 248px;
    height: 248px;
  }

  .holo-radar-sweep {
    width: 224px;
    height: 224px;
  }

  .section {
    padding: 56px 0;
  }

  .section-header h2 {
    font-size: 1.65rem;
  }

  .media-ai-grid,
  .pricing-cards {
    grid-template-columns: 1fr;
  }

  .btn {
    min-height: 50px;
    padding: 12px 22px;
  }

  .footer-only-links {
    flex-direction: column;
    gap: 12px;
  }

  .footer-only-links a {
    width: 100%;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 12px;
    background: rgba(16, 185, 129, 0.04);
  }

  .subpage-card,
  .seo-toc-card,
  .seo-article {
    padding: 26px 18px;
  }

  .seo-toc-grid {
    grid-template-columns: 1fr;
  }

  .seo-toc-grid a {
    min-height: 44px;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero-visual {
    padding: 18px 12px;
  }

  .holo-stage-wrap,
  .holo-globe-3d {
    width: 248px;
    height: 248px;
  }

  .holo-orbit-outer {
    width: 238px;
    height: 238px;
  }

  .holo-orbit-inner {
    width: 210px;
    height: 210px;
  }

  .holo-radar-sweep {
    width: 188px;
    height: 188px;
  }
}

/* ==========================================================================
   无障碍：减弱动态效果适配 (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;
  }
}