/* ==========================================================================
   咕嘎云 (GugaCloud - gugayun.lat) 官方落地页原生样式表
   规范：纯原生 CSS3、零外部重型框架、GPU 硬件加速动态背景、秒开极致体验
   ========================================================================== */

:root {
  --bg-main: #070b14;
  --bg-card: rgba(15, 23, 42, 0.72);
  --bg-card-hover: rgba(22, 34, 62, 0.85);
  --bg-header: rgba(7, 11, 20, 0.82);
  --border-subtle: rgba(56, 189, 248, 0.12);
  --border-active: rgba(56, 189, 248, 0.45);
  --border-highlight: rgba(168, 85, 247, 0.55);
  
  --primary: #0284c7;
  --primary-light: #38bdf8;
  --primary-glow: rgba(56, 189, 248, 0.28);
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.25);
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-rose: #f43f5e;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-light: #cbd5e1;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.22);
}

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

html {
  font-family: var(--font-sans);
  background-color: #080605;
  color: var(--text-main);
  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;
}

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

a:hover {
  color: #7dd3fc;
}

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   动态背景系统 (纯原生 CSS 硬件加速动态光环与网格)
   ========================================================================== */
.ambient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0; /* 在 body 之上，页面内容之下，杜绝被 body 背景覆盖 */
  pointer-events: none;
  overflow: hidden;
  background: 
    radial-gradient(ellipse at 88% 12%, #4d1c04 0%, #290f02 36%, #130702 68%, #080605 100%);
}

/* 暖阳逆光核心漫反射流光 */
.sun-glare {
  position: absolute;
  top: -18%;
  right: -6%;
  width: 840px;
  height: 840px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(254, 240, 138, 0.48) 0%,
    rgba(251, 146, 60, 0.32) 28%,
    rgba(234, 88, 12, 0.16) 54%,
    transparent 76%
  );
  filter: blur(52px);
  animation: sunBreath 14s ease-in-out infinite alternate;
  will-change: transform, opacity;
}

@keyframes sunBreath {
  0% { transform: translate3d(0, 0, 0) scale(1); opacity: 0.85; }
  50% { transform: translate3d(-35px, 20px, 0) scale(1.1); opacity: 1; }
  100% { transform: translate3d(20px, -15px, 0) scale(0.95); opacity: 0.8; }
}

/* 梦幻柔焦暖橙金色光斑 (Bokeh 光斑群) */
.bokeh-spot {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform, opacity;
}

.bs-1 {
  top: 16%;
  right: 25%;
  width: 170px;
  height: 170px;
  background: radial-gradient(circle, rgba(254, 240, 138, 0.52) 0%, rgba(251, 146, 60, 0.26) 55%, transparent 75%);
  filter: blur(12px);
  animation: bokehFloat1 18s ease-in-out infinite alternate;
}

.bs-2 {
  top: 34%;
  right: 14%;
  width: 110px;
  height: 110px;
  background: radial-gradient(circle, rgba(253, 186, 116, 0.6) 0%, rgba(249, 115, 22, 0.3) 60%, transparent 80%);
  filter: blur(8px);
  animation: bokehFloat2 15s ease-in-out infinite alternate;
}

.bs-3 {
  top: 8%;
  right: 42%;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(254, 215, 170, 0.38) 0%, rgba(234, 88, 12, 0.16) 60%, transparent 80%);
  filter: blur(20px);
  animation: bokehFloat3 22s ease-in-out infinite alternate;
}

.bs-4 {
  top: 50%;
  right: 30%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(255, 237, 213, 0.7) 0%, rgba(251, 146, 60, 0.35) 55%, transparent 75%);
  filter: blur(6px);
  animation: bokehFloat1 13s ease-in-out infinite alternate;
}

.bs-5 {
  bottom: 22%;
  left: 20%;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(253, 186, 116, 0.45) 0%, rgba(249, 115, 22, 0.18) 60%, transparent 80%);
  filter: blur(14px);
  animation: bokehFloat2 20s ease-in-out infinite alternate;
}

.bs-6 {
  top: 28%;
  left: 32%;
  width: 90px;
  height: 90px;
  background: radial-gradient(circle, rgba(254, 240, 138, 0.55) 0%, rgba(251, 146, 60, 0.22) 55%, transparent 75%);
  filter: blur(7px);
  animation: bokehFloat3 17s ease-in-out infinite alternate;
}

.bs-7 {
  bottom: 14%;
  right: 20%;
  width: 190px;
  height: 190px;
  background: radial-gradient(circle, rgba(251, 146, 60, 0.3) 0%, rgba(194, 65, 12, 0.12) 65%, transparent 80%);
  filter: blur(18px);
  animation: bokehFloat1 24s ease-in-out infinite alternate;
}

.bs-8 {
  top: 68%;
  left: 8%;
  width: 65px;
  height: 65px;
  background: radial-gradient(circle, rgba(255, 237, 213, 0.65) 0%, rgba(253, 186, 116, 0.3) 50%, transparent 75%);
  filter: blur(5px);
  animation: bokehFloat2 12s ease-in-out infinite alternate;
}

@keyframes bokehFloat1 {
  0% { transform: translate3d(0, 0, 0) scale(1); opacity: 0.7; }
  50% { transform: translate3d(35px, -25px, 0) scale(1.18); opacity: 0.95; }
  100% { transform: translate3d(-20px, 30px, 0) scale(0.9); opacity: 0.6; }
}

@keyframes bokehFloat2 {
  0% { transform: translate3d(0, 0, 0) scale(0.95); opacity: 0.65; }
  50% { transform: translate3d(-30px, 35px, 0) scale(1.15); opacity: 0.9; }
  100% { transform: translate3d(25px, -20px, 0) scale(1); opacity: 0.55; }
}

@keyframes bokehFloat3 {
  0% { transform: translate3d(0, 0, 0) scale(1.05); opacity: 0.6; }
  50% { transform: translate3d(25px, 25px, 0) scale(0.9); opacity: 0.85; }
  100% { transform: translate3d(-35px, -15px, 0) scale(1.12); opacity: 0.5; }
}

/* 左上方随风微曳的暖橙枫叶枝丫 (优雅偏左布局，不遮挡中央标语与功能卡片) */
.maple-branch-scene {
  position: absolute;
  top: -10px;
  left: -15px;
  width: min(480px, 34vw);
  max-width: 480px;
  transform-origin: 5% 5%;
  animation: branchSway 14s ease-in-out infinite alternate;
  filter: drop-shadow(0 12px 28px rgba(234, 88, 12, 0.35));
  will-change: transform;
  overflow: visible;
}

.maple-branch-img {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible !important;
}

@keyframes branchSway {
  0% { transform: rotate(0deg) translate3d(0, 0, 0); }
  35% { transform: rotate(1.4deg) translate3d(6px, 4px, 0); }
  70% { transform: rotate(-0.8deg) translate3d(-3px, 1px, 0); }
  100% { transform: rotate(0.6deg) translate3d(3px, 2px, 0); }
}

/* 随风徐徐飘舞的红枫落叶 */
.falling-leaf {
  position: absolute;
  top: -60px;
  opacity: 0;
  will-change: transform, opacity;
  filter: drop-shadow(0 4px 10px rgba(234, 88, 12, 0.35));
}

.fl-1 {
  left: 15%;
  animation: leafFall1 20s linear infinite;
  animation-delay: 0s;
}

.fl-2 {
  left: 35%;
  animation: leafFall2 26s linear infinite;
  animation-delay: 5s;
}

.fl-3 {
  left: 55%;
  animation: leafFall1 22s linear infinite;
  animation-delay: 11s;
}

.fl-4 {
  left: 75%;
  animation: leafFall2 24s linear infinite;
  animation-delay: 3s;
}

.fl-5 {
  left: 88%;
  animation: leafFall1 18s linear infinite;
  animation-delay: 8s;
}

@keyframes leafFall1 {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg) rotateY(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.8;
  }
  85% {
    opacity: 0.7;
  }
  100% {
    transform: translate3d(30vw, 115vh, 0) rotate(420deg) rotateY(360deg);
    opacity: 0;
  }
}

@keyframes leafFall2 {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg) rotateX(0deg);
    opacity: 0;
  }
  12% {
    opacity: 0.75;
  }
  88% {
    opacity: 0.65;
  }
  100% {
    transform: translate3d(-25vw, 115vh, 0) rotate(-380deg) rotateX(360deg);
    opacity: 0;
  }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  height: 48px;
  width: auto;
  transition: transform var(--transition-fast);
}

.brand-logo-img:hover {
  transform: scale(1.02);
}

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

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  position: relative;
  padding: 6px 2px;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-light);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

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

/* ==========================================================================
   Buttons & CTA Controls (严格包含 target="_blank" rel="nofollow")
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 16px;
  border-radius: var(--radius-lg);
  font-weight: 700;
}

.btn-primary {
  background: linear-gradient(135deg, #fdba74 0%, #fb923c 45%, #ea580c 100%);
  color: #ffffff !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  box-shadow: 0 4px 20px rgba(249, 115, 22, 0.4), 0 0 14px rgba(253, 186, 116, 0.3);
  border: 1px solid rgba(255, 237, 213, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #fed7aa 0%, #fb923c 40%, #c2410c 100%);
  box-shadow: 0 6px 26px rgba(249, 115, 22, 0.6), 0 0 20px rgba(253, 186, 116, 0.5);
  transform: translateY(-2px);
  color: #ffffff !important;
}

.btn-secondary {
  background: rgba(30, 41, 59, 0.7);
  color: var(--text-light) !important;
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(51, 65, 85, 0.85);
  border-color: var(--primary-light);
  color: #ffffff !important;
  transform: translateY(-2px);
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent,
    rgba(255, 255, 255, 0.15),
    transparent
  );
  transform: rotate(45deg);
  animation: shine 4s infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%) rotate(45deg); }
  25%, 100% { transform: translateX(100%) rotate(45deg); }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
main {
  position: relative;
  z-index: 1;
}

.hero-section {
  padding: 85px 0 70px;
  text-align: center;
  position: relative;
}

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 26px;
}

.badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.badge-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-light);
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
  color: #ffffff;
}

.text-gradient {
  background: linear-gradient(135deg, #ffedd5 0%, #fed7aa 25%, #fdba74 50%, #fb923c 80%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  filter: drop-shadow(0 0 16px rgba(251, 146, 60, 0.4));
}

.hero-subtitle {
  font-size: 19px;
  color: var(--text-muted);
  max-width: 840px;
  margin: 0 auto 38px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}

/* 实时网络监控指标条 */
.hero-stats-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1040px;
  margin: 0 auto;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px 32px;
  box-shadow: var(--shadow-card);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -9px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.stat-val {
  font-size: 30px;
  font-weight: 800;
  color: #ffffff;
  font-family: var(--font-mono);
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.stat-unit {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-light);
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

/* ==========================================================================
   Section Common Headers
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 1150px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
  background: rgba(6, 182, 212, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.35;
  margin-bottom: 14px;
  white-space: nowrap; /* 强制大屏单排展示，绝对不折行 */
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.68;
  max-width: 880px;
  margin: 0 auto;
}

/* ==========================================================================
   Features / Core Advantages Grid
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 20px rgba(56, 189, 248, 0.15);
}

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

.feature-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--primary-light);
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   PRICING TABLE SECTION (所有价格必须同排，严格对齐)
   ========================================================================== */
.pricing-section {
  position: relative;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.4) 0%, rgba(7, 11, 20, 0.8) 100%);
}

.pricing-row-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch; /* 保证所有价格卡片等高同排 */
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 34px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-card);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 25px rgba(56, 189, 248, 0.18);
}

/* 热门推荐高亮卡片 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(30, 41, 75, 0.85) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 2px solid var(--primary-light);
  box-shadow: 0 16px 45px rgba(2, 132, 199, 0.25), 0 0 30px rgba(56, 189, 248, 0.2);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #0284c7 0%, #7c3aed 100%);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.8px;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.4);
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 22px;
}

.plan-tier-name {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.plan-tag-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--primary-light);
}

.plan-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  min-height: 40px;
}

.plan-price-wrap {
  margin: 18px 0 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-light);
  vertical-align: top;
  margin-right: 2px;
}

.price-figure {
  font-size: 42px;
  font-weight: 900;
  color: #ffffff;
  font-family: var(--font-mono);
  line-height: 1;
}

.price-period {
  font-size: 13px;
  color: var(--text-dim);
  font-weight: 500;
  margin-left: 4px;
}

.price-equiv {
  font-size: 12px;
  color: var(--accent-cyan);
  margin-top: 6px;
  font-weight: 600;
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-light);
  line-height: 1.45;
}

.plan-feature-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--accent-green);
}

.plan-feature-item strong {
  color: #ffffff;
}

.plan-action-wrap {
  margin-top: auto;
}

.plan-action-wrap .btn {
  width: 100%;
}

.pricing-guarantee-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-top: 48px;
  padding: 16px 24px;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  font-size: 14px;
  color: var(--text-light);
  flex-wrap: wrap;
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.guarantee-item svg {
  color: var(--accent-green);
}

/* ==========================================================================
   Global Node Network Table & Latency Map
   ========================================================================== */
.nodes-table-wrap {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.nodes-table th {
  background: rgba(30, 41, 59, 0.7);
  padding: 16px 20px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--primary-light);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nodes-table td {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--text-light);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.nodes-table tr:hover td {
  background: rgba(56, 189, 248, 0.04);
}

.region-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: #ffffff;
}

.flag-icon {
  font-size: 18px;
  line-height: 1;
}

.ping-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-green);
  font-size: 13px;
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
}

.ping-tag.fast {
  color: #10b981;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ==========================================================================
   Multi-Client Support & Setup Flow
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 18px;
  text-align: center;
  transition: all var(--transition-fast);
}

.client-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
}

.client-os-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
  color: var(--primary-light);
}

.client-os-name {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.client-rec-software {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   Articles / SEO Airport Knowledge Hub (文章推荐区)
   ========================================================================== */
.articles-section {
  position: relative;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 12.5px;
  color: var(--text-dim);
}

.article-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 4px;
  background: rgba(251, 146, 60, 0.12);
  color: #fdba74;
  border: 1px solid rgba(253, 186, 116, 0.25);
  box-shadow: 0 0 8px rgba(251, 146, 60, 0.1);
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card-title a {
  color: #ffffff;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.article-card-title a:hover {
  color: #fdba74;
}

.article-card-excerpt {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: #fb923c;
  transition: all var(--transition-fast);
}

.article-readmore:hover {
  gap: 10px;
  color: #fed7aa;
}

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

.review-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

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

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

.review-content {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.reviewer-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0284c7, #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 15px;
}

.reviewer-info h4 {
  font-size: 14.5px;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.verified-badge {
  font-size: 11px;
  color: var(--accent-green);
  font-weight: 500;
}

.reviewer-info p {
  font-size: 12px;
  color: var(--text-dim);
}

/* ==========================================================================
   FAQ Section (常见问题解答 - 纯原生 details/summary 极速无JS)
   ========================================================================== */
.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(251, 146, 60, 0.35);
}

.faq-item[open] {
  border-color: rgba(251, 146, 60, 0.55);
  background: var(--bg-card-hover);
  box-shadow: 0 4px 24px rgba(249, 115, 22, 0.12);
}

.faq-question {
  padding: 20px 24px;
  font-size: 16.5px;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: #fed7aa;
}

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

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  color: #fdba74;
  transition: transform var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item[open] .faq-icon-arrow {
  transform: rotate(180deg);
  color: #fb923c;
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.72;
}

.faq-answer p {
  margin-bottom: 10px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   External Links / Authority Network Section (高质量外链与权威生态)
   ========================================================================== */
.external-links-section {
  background: rgba(10, 16, 28, 0.6);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 50px 0;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.ext-link-card {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-light);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.ext-link-card:hover {
  background: rgba(30, 41, 59, 0.8);
  border-color: var(--border-active);
  color: #ffffff;
  transform: translateY(-2px);
}

.ext-link-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
  flex-shrink: 0;
}

.ext-link-title {
  font-size: 13.5px;
  font-weight: 600;
  display: block;
}

.ext-link-sub {
  font-size: 11.5px;
  color: var(--text-dim);
  display: block;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  position: relative;
  z-index: 1;
  background-color: rgba(5, 8, 16, 0.85);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
  font-size: 14px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-muted);
  line-height: 1.68;
  margin-top: 14px;
  max-width: 380px;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  position: relative;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: var(--text-muted);
  font-size: 13.5px;
}

.footer-links-list a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-dim);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-copy {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-disclaimer {
  max-width: 600px;
  font-size: 12px;
  line-height: 1.5;
}

/* ==========================================================================
   Article Single Page Styles (文章详情页排版、目录、内链导流)
   ========================================================================== */
.article-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 38px;
}

.article-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 18px;
}

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

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

.article-main-title {
  font-size: 38px;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 18px;
}

.article-info-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-tag-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.article-content-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 45px;
  align-items: start;
}

.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: #e2e8f0;
}

.article-body h2 {
  font-size: 25px;
  font-weight: 800;
  color: #ffffff;
  margin: 38px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-light);
  margin: 26px 0 12px;
}

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

.article-body ul, .article-body ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

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

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

.article-body blockquote {
  border-left: 4px solid var(--primary-light);
  background: rgba(56, 189, 248, 0.08);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  color: var(--text-light);
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.15) 0%, rgba(124, 58, 237, 0.15) 100%);
  border: 1px solid var(--primary-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  text-align: center;
  margin: 40px 0;
}

.article-cta-box h3 {
  color: #ffffff;
  font-size: 22px;
  margin-bottom: 10px;
}

.article-cta-box p {
  color: var(--text-light);
  font-size: 14.5px;
  margin-bottom: 20px;
}

.article-sidebar {
  position: sticky;
  top: 95px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
}

.widget-title {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.widget-toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.widget-toc-list a {
  font-size: 13.5px;
  color: var(--text-muted);
}

.widget-toc-list a:hover {
  color: var(--primary-light);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1100px) {
  .pricing-row-container {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-stats-panel {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  
  .stat-item:not(:last-child)::after {
    display: none;
  }
  
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  
  .links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .section-title {
    white-space: normal;
    font-size: 26px;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 36px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .site-nav {
    display: none; /* 移动端精简模式，优先直连注册 */
  }
  
  .pricing-row-container {
    grid-template-columns: 1fr;
  }
  
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-stats-panel {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
  }
  
  .links-grid {
    grid-template-columns: 1fr;
  }
  
  .article-content-layout {
    grid-template-columns: 1fr;
  }
  
  .article-sidebar {
    position: static;
  }
  
  .article-main-title {
    font-size: 28px;
  }
}