/* ==========================================================================
   咕嘎云网 (GugaCloud - gugayun.cyou) 核心极速原生样式表
   纯原生 CSS3，零外部依赖，秒开性能与高转化现代动效设计
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* 品牌调色板 (契合紫晶星空蝴蝶视觉) */
  --bg-primary: #06020e;
  --bg-secondary: #0d051c;
  --bg-tertiary: #14092b;
  --bg-card: rgba(18, 9, 36, 0.72);
  --bg-card-hover: rgba(28, 14, 54, 0.88);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(192, 132, 252, 0.4);
  
  --primary: #c084fc;
  --primary-glow: rgba(192, 132, 252, 0.35);
  --secondary: #d8b4fe;
  --accent: #a855f7;
  --accent-warm: #f59e0b;
  --accent-pink: #ec4899;
  --success: #10b981;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-invert: #07090e;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 35px rgba(192, 132, 252, 0.25);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --container-max: 1240px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: #06020e;
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: transparent !important; /* 必须透明，确保动态背景与发光蝴蝶 100% 穿透显示 */
}

main {
  position: relative;
  z-index: 2; /* 确保主体内容置于动态背景上方，交互点击灵敏 */
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

/* ==========================================================================
   动态背景系统 (梦幻紫晶星空 · 3D灵动发光蝴蝶与星尘雷电脉冲)
   全原生纯 CSS3 硬件加速渲染，高帧率秒开，完美契合用户参考图
   ========================================================================== */
.dynamic-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0; /* 必须设为 0，与透明 body 配合，绝对不被负 z-index 遮挡 */
  overflow: hidden;
  pointer-events: none;
  background: radial-gradient(circle at 65% 20%, #240a42 0%, #120526 45%, #06020e 90%);
}

/* 宇宙星尘微粒层 (如参考图散落的明亮星尘光斑) */
.stardust-field {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background-image: 
    radial-gradient(2.2px 2.2px at 12% 18%, #ffffff 100%, transparent),
    radial-gradient(1.8px 1.8px at 28% 38%, #d8b4fe 100%, transparent),
    radial-gradient(2.8px 2.8px at 45% 20%, #c084fc 100%, transparent),
    radial-gradient(2.2px 2.2px at 68% 15%, #f5d0fe 100%, transparent),
    radial-gradient(3.2px 3.2px at 84% 32%, #e879f9 100%, transparent),
    radial-gradient(1.8px 1.8px at 18% 65%, #c4b5fd 100%, transparent),
    radial-gradient(2.5px 2.5px at 75% 58%, #a855f7 100%, transparent),
    radial-gradient(2.4px 2.4px at 92% 72%, #d8b4fe 100%, transparent),
    radial-gradient(1.8px 1.8px at 38% 75%, #ffffff 100%, transparent),
    radial-gradient(2.2px 2.2px at 58% 52%, #c084fc 100%, transparent);
  background-size: 440px 440px;
  animation: stardustTwinkle 5s infinite alternate ease-in-out;
  opacity: 0.9;
}

@keyframes stardustTwinkle {
  0% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.02); }
  100% { opacity: 0.7; transform: scale(0.99); }
}

/* 梦幻星云辉光球 */
.aurora-layer {
  position: absolute;
  border-radius: 50%;
  filter: blur(95px);
  opacity: 0.45;
  will-change: transform;
}

.aurora-1 {
  width: 780px;
  height: 780px;
  top: -140px;
  right: 5%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.45), rgba(112, 26, 117, 0.2) 65%, transparent 80%);
  animation: floatOrbOne 24s infinite alternate ease-in-out;
}

.aurora-2 {
  width: 680px;
  height: 680px;
  top: 30%;
  left: -80px;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.38), rgba(99, 102, 241, 0.15) 60%, transparent 80%);
  animation: floatOrbTwo 30s infinite alternate ease-in-out;
}

.aurora-3 {
  width: 750px;
  height: 750px;
  bottom: 5%;
  right: 20%;
  background: radial-gradient(circle, rgba(232, 121, 249, 0.32), rgba(88, 28, 135, 0.25) 65%, transparent 80%);
  animation: floatOrbThree 28s infinite alternate ease-in-out;
}

/* 宇宙闪电枝蔓 (参考图中央雷电紫晶脉冲) */
.cosmic-lightning {
  position: absolute;
  top: 10vh;
  left: 0;
  width: 100vw;
  height: 400px;
  pointer-events: none;
  opacity: 0.8;
  filter: drop-shadow(0 0 16px rgba(216, 180, 254, 0.95));
  animation: lightningBreath 5s infinite alternate ease-in-out;
}

@keyframes lightningBreath {
  0% { opacity: 0.55; filter: drop-shadow(0 0 10px rgba(168, 85, 247, 0.6)); }
  50% { opacity: 0.95; filter: drop-shadow(0 0 20px rgba(232, 121, 249, 0.95)); }
  100% { opacity: 0.6; filter: drop-shadow(0 0 12px rgba(192, 132, 252, 0.75)); }
}

/* 3D 灵动发光蝴蝶通用容器与透视 (绝对定位锁定左上角，防止坐标偏移下沉) */
.butterfly {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 10;
  perspective: 600px;
  transform-style: preserve-3d;
  will-change: transform;
}

.butterfly-svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* 左右翅膀 3D 扇动动画 (以蝶身中轴 50% 48% 为旋转原点，极度流畅轻盈) */
.bf-wing-left {
  transform-box: view-box;
  transform-origin: 50% 48%;
  transform-style: preserve-3d;
  animation: wingFlapLeft 0.24s infinite alternate ease-in-out;
}

.bf-wing-right {
  transform-box: view-box;
  transform-origin: 50% 48%;
  transform-style: preserve-3d;
  animation: wingFlapRight 0.24s infinite alternate ease-in-out;
}

@keyframes wingFlapLeft {
  0% { transform: rotateY(0deg) rotateZ(0deg); }
  100% { transform: rotateY(-66deg) rotateZ(-5deg); }
}

@keyframes wingFlapRight {
  0% { transform: rotateY(0deg) rotateZ(0deg); }
  100% { transform: rotateY(66deg) rotateZ(5deg); }
}

/* 伴随羽翼的磷光微粒闪烁散落 */
.bf-sparkle {
  animation: sparkleTwinkle 2.2s infinite alternate ease-in-out;
}
.sp-1 { animation-delay: 0.1s; }
.sp-2 { animation-delay: 0.45s; }
.sp-3 { animation-delay: 0.8s; }
.sp-4 { animation-delay: 1.15s; }
.sp-5 { animation-delay: 1.5s; }
.sp-6 { animation-delay: 1.85s; }

@keyframes sparkleTwinkle {
  0% { opacity: 0.2; transform: scale(0.6); }
  100% { opacity: 1; transform: scale(1.35); }
}

/* 蝴蝶 1：冰蓝淡紫仙蝶 (高定彩绘蕾丝翅脉与燕尾飘带) */
.butterfly-1 {
  width: 135px;
  height: 112px;
  filter: drop-shadow(0 0 16px rgba(165, 243, 252, 0.85)) drop-shadow(0 0 32px rgba(192, 132, 252, 0.5));
  animation: flyHoverLeft 14s infinite ease-in-out;
}

/* 蝴蝶 2：魅夜幻紫凤蝶 (参考图同款大型紫粉灵蝶) */
.butterfly-2 {
  width: 165px;
  height: 138px;
  filter: drop-shadow(0 0 20px rgba(240, 171, 252, 0.9)) drop-shadow(0 0 38px rgba(168, 85, 247, 0.55));
  animation: flyHoverRight 16s infinite ease-in-out;
}

/* 蝴蝶 3：中央景深微光蝶 */
.butterfly-3 {
  width: 82px;
  height: 68px;
  filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.75));
  animation: flyHoverCenter 20s infinite ease-in-out;
}

/* 蝴蝶 1 盘旋轨迹 (Hero 左侧灵动悬停与俯仰) */
@keyframes flyHoverLeft {
  0% {
    transform: translate3d(10vw, 24vh, 0) rotate(14deg) scale(1);
  }
  25% {
    transform: translate3d(20vw, 17vh, 0) rotate(26deg) scale(1.08);
  }
  50% {
    transform: translate3d(26vw, 30vh, 0) rotate(8deg) scale(1.02);
  }
  75% {
    transform: translate3d(15vw, 36vh, 0) rotate(-14deg) scale(0.96);
  }
  100% {
    transform: translate3d(10vw, 24vh, 0) rotate(14deg) scale(1);
  }
}

/* 蝴蝶 2 盘旋轨迹 (Hero 右侧灵动悬停与俯仰) */
@keyframes flyHoverRight {
  0% {
    transform: translate3d(76vw, 22vh, 0) rotate(-18deg) scale(1.1);
  }
  30% {
    transform: translate3d(65vw, 33vh, 0) rotate(-32deg) scale(1.2);
  }
  60% {
    transform: translate3d(82vw, 38vh, 0) rotate(12deg) scale(1.05);
  }
  80% {
    transform: translate3d(86vw, 25vh, 0) rotate(-6deg) scale(1.12);
  }
  100% {
    transform: translate3d(76vw, 22vh, 0) rotate(-18deg) scale(1.1);
  }
}

/* 蝴蝶 3 景深巡游轨迹 */
@keyframes flyHoverCenter {
  0% {
    transform: translate3d(46vw, 12vh, 0) rotate(8deg) scale(0.75);
  }
  50% {
    transform: translate3d(54vw, 22vh, 0) rotate(-10deg) scale(0.85);
  }
  100% {
    transform: translate3d(46vw, 12vh, 0) rotate(8deg) scale(0.75);
  }
}

.cyber-grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1; /* 位于动态背景之上，主体内容之下 */
  pointer-events: none;
  background-image: 
    linear-gradient(rgba(192, 132, 252, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(192, 132, 252, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.15) 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.15) 80%);
}

@keyframes floatOrbOne {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(80px, 120px, 0) scale(1.15); }
  100% { transform: translate3d(-60px, 60px, 0) scale(0.92); }
}

@keyframes floatOrbTwo {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-100px, 80px, 0) scale(1.1); }
  100% { transform: translate3d(50px, -70px, 0) scale(0.95); }
}

@keyframes floatOrbThree {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(110px, -90px, 0) scale(1.12); }
  100% { transform: translate3d(-40px, -40px, 0) scale(0.9); }
}

/* ==========================================================================
   通用布局容器
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section-padding {
  padding-top: 96px;
  padding-bottom: 96px;
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(192, 132, 252, 0.08);
  border: 1px solid rgba(192, 132, 252, 0.28);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.7;
}

.highlight-gradient {
  background: linear-gradient(135deg, #f5f3ff 0%, #ddd6fe 30%, #c084fc 65%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   顶部公告条与导航条
   ========================================================================== */
.top-notice-bar {
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.18), rgba(99, 102, 241, 0.25), rgba(236, 72, 153, 0.18));
  border-bottom: 1px solid rgba(56, 189, 248, 0.2);
  padding: 8px 16px;
  font-size: 0.85rem;
  color: #e2e8f0;
  text-align: center;
}

.notice-pill {
  display: inline-block;
  background: #38bdf8;
  color: #04101e;
  font-weight: 700;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  margin-right: 8px;
  letter-spacing: 0.04em;
}

.site-navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 2, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

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

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

.nav-brand-logo {
  height: 44px;
  width: auto;
}

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

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ==========================================================================
   按钮系统 (严格遵从 nofollow / target="_blank" 规范)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, #ede9fe 0%, #c4b5fd 35%, #a855f7 75%, #7c3aed 100%);
  color: #0b0318;
  box-shadow: 0 4px 20px rgba(192, 132, 252, 0.4);
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #f5f3ff 0%, #d8b4fe 35%, #b76bf7 75%, #6d28d9 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(192, 132, 252, 0.62);
  color: #04010a;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Hero 核心首屏
   ========================================================================== */
.hero-section {
  position: relative;
  padding-top: 70px;
  padding-bottom: 80px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--success);
  animation: pulseLight 1.8s infinite;
}

@keyframes pulseLight {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.35); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-title {
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 22px;
}

.hero-title-main {
  display: block;
  font-size: clamp(1.8rem, 3.8vw, 3rem);
  margin-bottom: 12px;
}

.hero-title-sub {
  display: block;
  font-size: clamp(1.2rem, 2.5vw, 2.1rem);
  font-weight: 800;
  color: #f1f5f9;
  white-space: nowrap;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 860px;
  margin: 0 auto 36px auto;
  line-height: 1.7;
}

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

.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  color: var(--text-muted);
  font-size: 0.88rem;
  flex-wrap: wrap;
}

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

/* ==========================================================================
   实时节点运行看板与测速演示
   ========================================================================== */
.stats-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-top: 36px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 12px;
  border-right: 1px solid var(--border-subtle);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.node-ticker {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.node-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
}

.node-chip .latency {
  color: var(--success);
  font-weight: 700;
  font-family: var(--font-mono);
}

/* ==========================================================================
   价格方案 (所有价格要同排 - 4列单排并列展示)
   ========================================================================== */
.pricing-section {
  position: relative;
}

.pricing-row-container {
  width: 100%;
  overflow-x: auto;
  padding-top: 26px; /* 预留顶部空间，彻底解决溢出切边、被遮挡问题 */
  padding-bottom: 20px;
}

/* 核心：4列同排单排并列容器 */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(260px, 1fr));
  gap: 20px;
  align-items: stretch;
  padding-top: 4px;
}

.pricing-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(14px);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 16px 40px rgba(0, 242, 254, 0.12);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(192, 132, 252, 0.12) 0%, rgba(13, 18, 29, 0.95) 100%);
  border: 2px solid #c084fc;
  box-shadow: 0 0 35px rgba(192, 132, 252, 0.28);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
}

.badge-featured {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #ede9fe 0%, #c4b5fd 40%, #a855f7 100%);
  color: #0b0318;
  font-weight: 800;
  font-size: 0.78rem;
  line-height: 1.2;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(192, 132, 252, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.4);
  z-index: 5;
}

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

.plan-type {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
}

.price-amount {
  font-size: 2.75rem;
  font-weight: 900;
  color: #ffffff;
  font-family: var(--font-mono);
  line-height: 1;
}

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

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  min-height: 42px;
}

.plan-features {
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 22px 0;
  margin: 20px 0 26px 0;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.feature-item:last-child {
  margin-bottom: 0;
}

.feature-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--success);
  margin-top: 2px;
}

.feature-strong {
  color: #ffffff;
  font-weight: 600;
}

/* ==========================================================================
   核心优势系统 (Features)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.feature-box-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(192, 132, 252, 0.12);
  border: 1px solid rgba(192, 132, 252, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
  box-shadow: 0 0 16px rgba(192, 132, 252, 0.12);
}

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

.feature-box-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   客户端生态与一键导入支持
   ========================================================================== */
.client-apps-section {
  background: linear-gradient(180deg, rgba(13, 18, 29, 0.4) 0%, rgba(19, 27, 44, 0.6) 100%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  text-align: center;
  transition: all var(--transition-fast);
}

.client-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.client-os-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto 12px auto;
  color: var(--secondary);
}

.client-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

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

/* ==========================================================================
   文章专栏 (Articles Grid & Cards)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.article-badge {
  padding: 2px 10px;
  background: rgba(192, 132, 252, 0.12);
  border: 1px solid rgba(192, 132, 252, 0.32);
  color: var(--secondary);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  color: #ffffff;
  margin-bottom: 12px;
}

.article-title a:hover {
  color: var(--primary);
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
}

.article-link:hover {
  gap: 10px;
  color: #ffffff;
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

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

.review-rating {
  display: flex;
  gap: 4px;
  color: var(--accent-warm);
  margin-bottom: 14px;
  font-size: 1rem;
}

.review-quote {
  font-size: 0.94rem;
  color: #e2e8f0;
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 1rem;
  flex-shrink: 0;
}

.author-info h4 {
  font-size: 0.94rem;
  color: #ffffff;
  margin-bottom: 2px;
}

.author-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题 FAQ (SEO FAQ Schema Ready)
   ========================================================================== */
.faq-grid {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 28px;
  backdrop-filter: blur(10px);
  transition: border-color var(--transition-fast);
}

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

.faq-question {
  font-size: 1.08rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 10px;
}

.faq-question-icon {
  color: var(--primary);
  font-weight: 800;
  font-size: 1.2rem;
}

.faq-answer {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ==========================================================================
   外链推荐模块 (权威技术外链与资源索引)
   ========================================================================== */
.external-links-hub {
  margin-top: 50px;
  padding: 28px;
  background: rgba(16, 23, 38, 0.45);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
  text-align: center;
}

.hub-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
}

.hub-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.hub-link {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.hub-link:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(192, 132, 252, 0.08);
}

/* ==========================================================================
   文章详情页排版专用样式 (Article Pages Layout)
   ========================================================================== */
.article-header {
  padding: 60px 0 36px 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 40px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.article-breadcrumb a:hover {
  color: var(--primary);
}

.article-main-title {
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 20px;
}

.article-content {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1.02rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.55rem;
  color: #ffffff;
  margin: 44px 0 18px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-content h3 {
  font-size: 1.25rem;
  color: #f1f5f9;
  margin: 30px 0 14px 0;
}

.article-content p {
  margin-bottom: 22px;
}

.article-content strong {
  color: #ffffff;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 20px;
}

.article-content li {
  margin-bottom: 10px;
  list-style: disc;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 26px 0;
  font-size: 0.9rem;
}

.article-content th, .article-content td {
  padding: 12px 16px;
  border: 1px solid var(--border-subtle);
  text-align: left;
}

.article-content th {
  background: var(--bg-tertiary);
  color: #ffffff;
  font-weight: 700;
}

.article-content tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.article-callout {
  background: rgba(192, 132, 252, 0.08);
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 30px 0;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(192, 132, 252, 0.15), rgba(99, 102, 241, 0.15));
  border: 1px solid rgba(192, 132, 252, 0.35);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  margin: 48px 0;
}

.article-navigation {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.article-nav-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  max-width: 48%;
  flex: 1 1 300px;
  transition: all var(--transition-fast);
}

.article-nav-link:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

.article-nav-link span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.article-nav-link strong {
  font-size: 0.92rem;
  color: #ffffff;
}

/* ==========================================================================
   页脚 (Footer)
   ========================================================================== */
.site-footer {
  background: #04060a;
  border-top: 1px solid var(--border-subtle);
  padding-top: 70px;
  padding-bottom: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 380px;
  margin-top: 16px;
}

.footer-col h5 {
  color: #ffffff;
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.footer-col ul li a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.84rem;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-disclaimer {
  max-width: 780px;
  line-height: 1.6;
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1080px) {
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .client-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
  /* 价格同排在屏幕不够宽时提供平滑横向滚动，确保同排对比不折行错乱 */
  .pricing-grid-same-row {
    grid-template-columns: repeat(4, 270px);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  .client-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 16px;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-title-main {
    font-size: clamp(1.4rem, 5.5vw, 1.9rem);
  }
  .hero-title-sub {
    font-size: clamp(0.92rem, 4.2vw, 1.3rem);
    white-space: nowrap;
  }
  .btn-lg {
    width: 100%;
  }
}