/* ===================================================================
   银河云 YinHeYun - 官方落地页纯原生样式表
   赛博星城 + 霓虹天际 + 赛博朋克 视觉规范
   =================================================================== */

:root {
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Segoe UI", Roboto, sans-serif;
  
  /* 赛博朋克核心配色 */
  --bg-body: #0F0524;            /* 主背景：暗紫黑 */
  --primary: #FF006E;            /* 主色：霓虹粉 */
  --accent-cyan: #00F5FF;        /* 次色：电光青 */
  --accent-yellow: #FFE600;      /* 强调：霓虹黄 */
  
  /* 容器与卡片质感 */
  --bg-card: rgba(22, 11, 48, 0.78);
  --bg-card-hover: rgba(35, 17, 75, 0.9);
  --bg-glass: rgba(20, 8, 44, 0.88);
  
  /* 渐变与光效 */
  --grad-galaxy: linear-gradient(135deg, #FF006E 0%, #00F5FF 100%);
  --grad-galaxy-hover: linear-gradient(135deg, #ff1a82 0%, #29f7ff 100%);
  --grad-card-border: linear-gradient(135deg, rgba(255, 0, 110, 0.45), rgba(0, 245, 255, 0.3));
  
  /* 文本色阶 */
  --text-main: #FFFFFF;
  --text-sub: #A59BC8;
  --text-light: #E0DAF5;
  --text-accent: #00F5FF;
  
  /* 边框与光影 */
  --border-light: rgba(255, 0, 110, 0.2);
  --border-hover: #00F5FF;
  --shadow-glow-pink: 0 0 30px rgba(255, 0, 110, 0.35);
  --shadow-glow-cyan: 0 0 30px rgba(0, 245, 255, 0.35);
  
  /* 尺寸与过渡 */
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  --transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ===================================================================
   背景动效：透视网格 + 40条霓虹雨 + 扫描线 + 2个呼吸光晕
   =================================================================== */

/* 1. 底部透视网格（粉/青混合快速滚动） */
.cyber-grid {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 48vh;
  overflow: hidden;
  perspective: 350px;
  pointer-events: none;
  z-index: 1;
}

.cyber-grid-plane {
  position: absolute;
  width: 240%;
  left: -70%;
  height: 200%;
  bottom: -40%;
  background-image: 
    linear-gradient(to right, rgba(0, 245, 255, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 0, 110, 0.35) 1px, transparent 1px);
  background-size: 45px 45px;
  transform: rotateX(68deg);
  animation: cyberGridScroll 1.2s linear infinite;
  mask-image: linear-gradient(to top, rgba(0,0,0,1) 15%, transparent 95%);
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,1) 15%, transparent 95%);
}

@keyframes cyberGridScroll {
  0% { background-position: 0 0; }
  100% { background-position: 0 45px; }
}

/* 2. 40 条粉色霓虹雨滴下落 */
.cyber-rain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.cyber-rain span {
  position: absolute;
  top: -120px;
  width: 2px;
  height: 48px;
  background: linear-gradient(180deg, transparent, #FF006E);
  box-shadow: 0 0 10px #FF006E, 0 0 18px #FF006E;
  border-radius: 99px;
  opacity: 0.75;
  animation: rainDropFall linear infinite;
}

@keyframes rainDropFall {
  0% { transform: translateY(0); opacity: 0; }
  15% { opacity: 0.85; }
  90% { opacity: 0.85; }
  100% { transform: translateY(115vh); opacity: 0; }
}

/* 随机分布 40 条雨滴的定位、时长与延迟 */
.cyber-rain span:nth-child(1)  { left: 2%;  animation-duration: 1.4s; animation-delay: 0.2s; }
.cyber-rain span:nth-child(2)  { left: 5%;  animation-duration: 2.1s; animation-delay: 1.1s; }
.cyber-rain span:nth-child(3)  { left: 8%;  animation-duration: 1.7s; animation-delay: 0.5s; }
.cyber-rain span:nth-child(4)  { left: 11%; animation-duration: 2.5s; animation-delay: 1.8s; }
.cyber-rain span:nth-child(5)  { left: 13%; animation-duration: 1.3s; animation-delay: 0.1s; }
.cyber-rain span:nth-child(6)  { left: 16%; animation-duration: 2.2s; animation-delay: 1.4s; }
.cyber-rain span:nth-child(7)  { left: 19%; animation-duration: 1.8s; animation-delay: 0.7s; }
.cyber-rain span:nth-child(8)  { left: 22%; animation-duration: 2.4s; animation-delay: 2.0s; }
.cyber-rain span:nth-child(9)  { left: 25%; animation-duration: 1.5s; animation-delay: 0.3s; }
.cyber-rain span:nth-child(10) { left: 27%; animation-duration: 2.0s; animation-delay: 1.2s; }
.cyber-rain span:nth-child(11) { left: 30%; animation-duration: 1.6s; animation-delay: 0.9s; }
.cyber-rain span:nth-child(12) { left: 33%; animation-duration: 2.3s; animation-delay: 1.7s; }
.cyber-rain span:nth-child(13) { left: 36%; animation-duration: 1.4s; animation-delay: 0.4s; }
.cyber-rain span:nth-child(14) { left: 38%; animation-duration: 2.1s; animation-delay: 1.0s; }
.cyber-rain span:nth-child(15) { left: 41%; animation-duration: 1.9s; animation-delay: 0.8s; }
.cyber-rain span:nth-child(16) { left: 44%; animation-duration: 2.6s; animation-delay: 2.2s; }
.cyber-rain span:nth-child(17) { left: 47%; animation-duration: 1.5s; animation-delay: 0.3s; }
.cyber-rain span:nth-child(18) { left: 49%; animation-duration: 2.2s; animation-delay: 1.5s; }
.cyber-rain span:nth-child(19) { left: 52%; animation-duration: 1.7s; animation-delay: 0.6s; }
.cyber-rain span:nth-child(20) { left: 55%; animation-duration: 2.4s; animation-delay: 1.9s; }
.cyber-rain span:nth-child(21) { left: 58%; animation-duration: 1.3s; animation-delay: 0.2s; }
.cyber-rain span:nth-child(22) { left: 60%; animation-duration: 2.0s; animation-delay: 1.3s; }
.cyber-rain span:nth-child(23) { left: 63%; animation-duration: 1.8s; animation-delay: 0.7s; }
.cyber-rain span:nth-child(24) { left: 66%; animation-duration: 2.5s; animation-delay: 2.1s; }
.cyber-rain span:nth-child(25) { left: 69%; animation-duration: 1.6s; animation-delay: 0.5s; }
.cyber-rain span:nth-child(26) { left: 71%; animation-duration: 2.1s; animation-delay: 1.1s; }
.cyber-rain span:nth-child(27) { left: 74%; animation-duration: 1.4s; animation-delay: 0.3s; }
.cyber-rain span:nth-child(28) { left: 77%; animation-duration: 2.3s; animation-delay: 1.6s; }
.cyber-rain span:nth-child(29) { left: 80%; animation-duration: 1.7s; animation-delay: 0.8s; }
.cyber-rain span:nth-child(30) { left: 82%; animation-duration: 2.5s; animation-delay: 2.0s; }
.cyber-rain span:nth-child(31) { left: 85%; animation-duration: 1.5s; animation-delay: 0.4s; }
.cyber-rain span:nth-child(32) { left: 87%; animation-duration: 2.0s; animation-delay: 1.2s; }
.cyber-rain span:nth-child(33) { left: 90%; animation-duration: 1.8s; animation-delay: 0.6s; }
.cyber-rain span:nth-child(34) { left: 92%; animation-duration: 2.4s; animation-delay: 1.8s; }
.cyber-rain span:nth-child(35) { left: 94%; animation-duration: 1.4s; animation-delay: 0.1s; }
.cyber-rain span:nth-child(36) { left: 96%; animation-duration: 2.2s; animation-delay: 1.5s; }
.cyber-rain span:nth-child(37) { left: 3%;  animation-duration: 1.9s; animation-delay: 0.9s; }
.cyber-rain span:nth-child(38) { left: 28%; animation-duration: 2.6s; animation-delay: 2.3s; }
.cyber-rain span:nth-child(39) { left: 61%; animation-duration: 1.5s; animation-delay: 0.4s; }
.cyber-rain span:nth-child(40) { left: 88%; animation-duration: 2.1s; animation-delay: 1.3s; }

/* 3. 叠加扫描线 (CRT Scanlines) */
.cyber-scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 99;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.22) 0px,
    rgba(0, 0, 0, 0.22) 1px,
    transparent 1px,
    transparent 3px
  );
  opacity: 0.65;
}

/* 4. 2 个粉/青 blur 光晕呼吸缩放 */
.glow-orb-pink {
  position: fixed;
  width: 520px;
  height: 520px;
  top: 5%;
  left: -8%;
  background: radial-gradient(circle, rgba(255, 0, 110, 0.32) 0%, transparent 68%);
  filter: blur(85px);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  animation: orbBreathePink 6s ease-in-out infinite alternate;
}

.glow-orb-cyan {
  position: fixed;
  width: 550px;
  height: 550px;
  top: 30%;
  right: -10%;
  background: radial-gradient(circle, rgba(0, 245, 255, 0.28) 0%, transparent 68%);
  filter: blur(95px);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  animation: orbBreatheCyan 7s ease-in-out infinite alternate;
}

@keyframes orbBreathePink {
  0%   { transform: scale(0.85) translate(0, 0); opacity: 0.6; }
  100% { transform: scale(1.22) translate(35px, -20px); opacity: 0.95; }
}

@keyframes orbBreatheCyan {
  0%   { transform: scale(1.18) translate(0, 0); opacity: 0.55; }
  100% { transform: scale(0.82) translate(-35px, 30px); opacity: 0.9; }
}

/* ===================================================================
   顶部导航栏
   =================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 5, 36, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 0, 110, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  height: 72px;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.brand-logo svg {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 10px #FF006E);
}

.brand-text-en {
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-left: 4px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-sub);
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(0, 245, 255, 0.7);
}

/* ===================================================================
   CTA 按钮核心规范：
   粉色描边按钮 + 4px 青色硬阴影
   hover 时填充粉色 + 阴影变 2px 模拟按下
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
  letter-spacing: 0.5px;
  position: relative;
  text-decoration: none;
}

/* 主按钮 (Primary CTA) */
.btn-primary {
  background: transparent;
  color: #FF006E;
  border: 2px solid #FF006E;
  box-shadow: 4px 4px 0px #00F5FF;
  padding: 12px 30px;
  font-size: 1rem;
}

.btn-primary:hover {
  background: #FF006E;
  color: #FFFFFF;
  box-shadow: 2px 2px 0px #00F5FF;
  transform: translate(2px, 2px);
}

.btn-primary:active {
  box-shadow: 0px 0px 0px #00F5FF;
  transform: translate(4px, 4px);
}

/* 次级按钮 (Secondary CTA) */
.btn-secondary {
  background: transparent;
  color: #00F5FF;
  border: 2px solid #00F5FF;
  box-shadow: 4px 4px 0px #FF006E;
  padding: 12px 28px;
  font-size: 1rem;
}

.btn-secondary:hover {
  background: #00F5FF;
  color: #0F0524;
  box-shadow: 2px 2px 0px #FF006E;
  transform: translate(2px, 2px);
}

.btn-secondary:active {
  box-shadow: 0px 0px 0px #FF006E;
  transform: translate(4px, 4px);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.88rem;
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   主视觉区 (Hero Section) & 右侧动画组件
   =================================================================== */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
}

.hero-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.hero-content {
  flex: 1;
  max-width: 760px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 0, 110, 0.12);
  border: 1px solid rgba(255, 0, 110, 0.45);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 0 14px rgba(255, 0, 110, 0.2);
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
}

.gradient-text {
  background: var(--grad-galaxy);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 18px rgba(255, 0, 110, 0.35));
}

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--text-light);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 44px;
}

/* ===================================================================
   右侧动画：280×200px 赛博城市天际线 SVG
   - 8 栋建筑，粉/青双色描边+半透明填充
   - 黄色窗户按节奏闪烁
   - 整体上下浮动 4 秒一周期
   - 3D 旋转 20 秒一周期
   - 2 层虚线圆轨道反向旋转
   =================================================================== */
.hero-skyline-widget {
  width: 280px;
  height: 200px;
  flex-shrink: 0;
  perspective: 800px;
  position: relative;
}

.skyline-3d-wrapper {
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation: 
    skylineFloat 4s ease-in-out infinite,
    skyline3DRotate 20s linear infinite;
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes skylineFloat {
  0%, 100% { transform: translateY(0px); }
  50%      { transform: translateY(-16px); }
}

@keyframes skyline3DRotate {
  0%   { transform: rotateY(0deg) rotateX(6deg); }
  50%  { transform: rotateY(180deg) rotateX(-6deg); }
  100% { transform: rotateY(360deg) rotateX(6deg); }
}

/* 2 层虚线圆轨道反向旋转 */
.skyline-orbit-outer {
  transform-origin: 140px 100px;
  animation: orbitCW 16s linear infinite;
}

.skyline-orbit-inner {
  transform-origin: 140px 100px;
  animation: orbitCCW 12s linear infinite;
}

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

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

/* 黄色窗户节奏闪烁 */
.win-blink-1 {
  animation: winGlow1 1.6s ease-in-out infinite alternate;
}
.win-blink-2 {
  animation: winGlow2 2.2s ease-in-out infinite alternate;
}
.win-blink-3 {
  animation: winGlow3 1.9s ease-in-out infinite alternate;
}

@keyframes winGlow1 {
  0%, 20%  { fill: #FFE600; opacity: 0.95; filter: drop-shadow(0 0 3px #FFE600); }
  80%, 100%{ fill: rgba(255, 230, 0, 0.2); opacity: 0.25; filter: none; }
}

@keyframes winGlow2 {
  0%, 30%  { fill: rgba(255, 230, 0, 0.2); opacity: 0.2; filter: none; }
  70%, 100%{ fill: #FFE600; opacity: 0.95; filter: drop-shadow(0 0 4px #FFE600); }
}

@keyframes winGlow3 {
  0%, 100% { fill: #FFE600; opacity: 0.9; filter: drop-shadow(0 0 3px #FFE600); }
  50%      { fill: rgba(255, 230, 0, 0.15); opacity: 0.15; filter: none; }
}

/* 信任徽标 */
.hero-trust-badges {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 28px;
  border-top: 1px solid rgba(255, 0, 110, 0.2);
  padding-top: 32px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-light);
}

.trust-item svg {
  color: var(--accent-cyan);
  width: 18px;
  height: 18px;
  filter: drop-shadow(0 0 6px #00F5FF);
}

/* ===================================================================
   通用区块与卡片样式 (赛博朋克暗夜卡片)
   =================================================================== */
.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background-color: rgba(15, 5, 36, 0.55);
}

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

.section-label {
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 2.5px;
  color: var(--primary);
  margin-bottom: 10px;
  text-shadow: 0 0 10px rgba(255, 0, 110, 0.6);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
}

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 25px rgba(0, 245, 255, 0.25), inset 0 0 15px rgba(255, 0, 110, 0.1);
}

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

.card-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sm);
  background: rgba(255, 0, 110, 0.15);
  border: 1px solid rgba(255, 0, 110, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--accent-cyan);
  box-shadow: 0 0 14px rgba(255, 0, 110, 0.3);
}

.card-icon-box svg {
  width: 28px;
  height: 28px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* 流媒体与 AI 支持图卡 */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.media-ai-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-pink);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 24px;
}

.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 0, 110, 0.08);
  border: 1px solid rgba(255, 0, 110, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 600;
}

/* ===================================================================
   套餐价格对比表
   =================================================================== */
.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-light);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 25px rgba(0, 245, 255, 0.3);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(38, 15, 78, 0.95) 0%, rgba(22, 11, 48, 0.95) 100%);
  border: 2px solid var(--primary);
  box-shadow: 4px 4px 0px #00F5FF, 0 0 35px rgba(255, 0, 110, 0.35);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 6px 6px 0px #00F5FF, 0 0 45px rgba(255, 0, 110, 0.45);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: #FF006E;
  color: #FFFFFF;
  padding: 4px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 2px 2px 0px #00F5FF;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255, 0, 110, 0.2);
  padding-bottom: 24px;
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.amount {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
}

.period {
  font-size: 0.95rem;
  color: var(--text-sub);
}

.feature-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-light);
  margin-bottom: 14px;
}

.feature-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--accent-cyan);
}

/* ===================================================================
   用户评价与真实口碑
   =================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow-pink);
}

.stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: #FFE600;
  filter: drop-shadow(0 0 4px rgba(255, 230, 0, 0.6));
}

.stars svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 24px;
}

.user-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 0, 110, 0.2);
  border: 1px solid #FF006E;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--accent-cyan);
}

.user-name {
  font-size: 0.95rem;
  font-weight: 700;
}

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

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

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

.faq-item:hover {
  border-color: var(--accent-cyan);
}

.faq-item[open] {
  border-color: #FF006E;
  background: var(--bg-card-hover);
  box-shadow: 0 0 15px rgba(255, 0, 110, 0.2);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.25s ease;
  color: var(--accent-cyan);
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: #FF006E;
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.75;
}

.faq-item[open] .faq-answer {
  border-top: 1px solid rgba(255, 0, 110, 0.2);
  padding-top: 16px;
}

/* 底部 CTA 诱导条 */
.cta-banner {
  margin: 40px auto 0;
  background: linear-gradient(135deg, rgba(255, 0, 110, 0.15) 0%, rgba(0, 245, 255, 0.12) 100%);
  border: 2px solid rgba(255, 0, 110, 0.4);
  box-shadow: 4px 4px 0px #00F5FF;
  border-radius: var(--radius-md);
  padding: 50px 40px;
  text-align: center;
}

.cta-banner h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-banner p {
  color: var(--text-light);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

/* ===================================================================
   页脚规范：严格保留四个指定标题
   =================================================================== */
.footer {
  margin-top: auto;
  border-top: 1px solid rgba(255, 0, 110, 0.25);
  background: #0A031A;
  padding: 40px 0;
  position: relative;
  z-index: 2;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-light);
  transition: var(--transition);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: #00F5FF;
  background: rgba(0, 245, 255, 0.08);
  text-shadow: 0 0 8px #00F5FF;
}

/* ===================================================================
   子页面通用与文章专栏样式扩展
   =================================================================== */
.page-header {
  padding: 70px 0 40px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 0, 110, 0.25);
  background: rgba(22, 11, 48, 0.4);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.page-subtitle {
  color: var(--text-sub);
  font-size: 1rem;
}

.content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 48px;
  margin: 40px auto 80px;
  max-width: 1140px;
}

.content-section {
  margin-bottom: 40px;
}

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

.content-heading {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-heading::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--grad-galaxy);
  border-radius: 2px;
}

.content-body {
  color: var(--text-light);
  line-height: 1.85;
  font-size: 0.98rem;
}

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

.content-list {
  list-style-type: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

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

.highlight-box {
  background: rgba(255, 0, 110, 0.08);
  border: 1px solid rgba(255, 0, 110, 0.35);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin: 20px 0;
  color: var(--text-light);
}

/* 网站地图专用结构 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sitemap-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 24px;
}

.sitemap-card h4 {
  font-size: 1.15rem;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(255, 0, 110, 0.2);
  padding-bottom: 8px;
}

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

.sitemap-links a {
  color: var(--text-light);
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.sitemap-links a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

/* SEO 文章与知识专栏专用样式扩展 */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--text-light);
  transition: var(--transition);
}

.breadcrumbs a:hover {
  color: var(--accent-cyan);
}

.article-header {
  margin-bottom: 32px;
  border-bottom: 1px solid rgba(255, 0, 110, 0.25);
  padding-bottom: 24px;
}

.article-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 16px;
  color: var(--text-main);
}

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

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

.article-body {
  color: var(--text-light);
  font-size: 1rem;
  line-height: 1.85;
}

.article-body p {
  margin-bottom: 18px;
  text-align: justify;
}

.article-body h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 32px 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}

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

.inline-link {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 700;
  transition: var(--transition);
}

.inline-link:hover {
  color: var(--primary);
  text-shadow: 0 0 8px rgba(255, 0, 110, 0.6);
}

/* 知识文章列表网格：桌面端 3x3 九宫格排版 */
.articles-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.article-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-item-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  box-shadow: 0 0 20px rgba(0, 245, 255, 0.25);
}

.article-item-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.45;
  color: var(--text-main);
}

.article-item-card p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.article-item-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-sub);
  border-top: 1px solid rgba(255, 0, 110, 0.15);
  padding-top: 12px;
}

.read-more-link {
  color: var(--accent-cyan);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===================================================================
   响应式适配：媒体查询 (@media) 保证手机端单栏与极佳点击体验
   =================================================================== */
@media (max-width: 1024px) {
  .advantages-grid,
  .pricing-grid,
  .testimonials-grid,
  .articles-list-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

  .hero-layout {
    flex-direction: column;
    text-align: center;
  }

  .hero-cta-group,
  .hero-trust-badges {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    padding: 0 10px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    padding: 0 16px;
  }

  .btn {
    width: 100%;
    min-height: 48px;
    font-size: 1.05rem;
  }

  .hero-skyline-widget {
    margin: 20px auto 0;
  }

  .advantages-grid,
  .media-ai-grid,
  .pricing-grid,
  .testimonials-grid,
  .sitemap-grid,
  .articles-list-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .section {
    padding: 50px 0;
  }

  .content-box {
    padding: 24px 18px;
    margin: 20px auto 40px;
  }

  .cta-banner {
    padding: 36px 20px;
  }

  .cta-banner h3 {
    font-size: 1.6rem;
  }

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

  .nav-menu {
    display: none;
  }
}

/* ===================================================================
   无障碍访问（a11y）与交互质量增强规范
   =================================================================== */

/* 1. 跳转到主要内容（Skip-to-content）键盘访问入口 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--bg-body);
  color: var(--accent-cyan);
  padding: 12px 24px;
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 245, 255, 0.6);
  z-index: 9999;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 20px;
  outline: none;
}

/* 2. 键盘焦点样式 (:focus-visible) */
:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

button:focus-visible,
.btn:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* 3. 固定页眉防遮挡锚点偏移量 */
[id] {
  scroll-margin-top: 86px;
}

/* 4. 移动端触摸热区标准保障 */
@media (max-width: 768px) {
  .nav-container .btn-sm {
    min-height: 44px;
    padding: 10px 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .footer-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
  }
}

/* 5. 系统级减弱动效偏好适配 (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;
  }

  .cyber-grid-plane,
  .cyber-rain span,
  .glow-orb-pink,
  .glow-orb-cyan,
  .hero-skyline-widget,
  .skyline-orbit-outer,
  .skyline-orbit-inner,
  .win-blink-1,
  .win-blink-2,
  .win-blink-3 {
    animation: none !important;
    transform: none !important;
  }
}