/* ===================================================================
   XFLTD 养鸡场官网 (xfltd.lat) - 核心纯原生样式表
   零重型外部依赖 · 纯 CSS3 硬件加速 · 毫秒级极速首屏
   =================================================================== */

:root {
  --bg-dark: #040814;
  --bg-card: rgba(13, 20, 38, 0.72);
  --bg-card-hover: rgba(20, 31, 58, 0.88);
  --border-card: rgba(56, 189, 248, 0.16);
  --border-card-hover: rgba(56, 189, 248, 0.45);
  
  --primary: #38bdf8;
  --primary-glow: rgba(56, 189, 248, 0.35);
  --accent-gold: #f59e0b;
  --accent-gold-glow: rgba(245, 158, 11, 0.3);
  --accent-cyan: #06b6d4;
  --accent-purple: #818cf8;
  --success: #10b981;
  --danger: #ef4444;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #64748b;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "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;
  
  --container-max: 1240px;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --transition-fast: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 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);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-dark);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-dark);
}

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

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

ul, ol {
  list-style: none;
}

button, input {
  font: inherit;
}

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

.site-wrapper {
  position: relative;
  z-index: 1;
}

/* ===================================================================
   动态背景系统 (纯 CSS3 硬件加速，零耗能与极致秒开)
   =================================================================== */
.dynamic-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  background: radial-gradient(circle at 50% 20%, #08112c 0%, #030611 75%);
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  transform: translateZ(0);
  will-change: transform;
}

.orb-1 {
  top: -10%;
  left: 15%;
  width: 580px;
  height: 580px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.4) 0%, rgba(3, 105, 161, 0.05) 70%, transparent 100%);
  animation: floatOrb1 24s ease-in-out infinite alternate;
}

.orb-2 {
  top: 35%;
  right: -5%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.35) 0%, rgba(180, 83, 9, 0.05) 70%, transparent 100%);
  animation: floatOrb2 28s ease-in-out infinite alternate;
}

.orb-3 {
  bottom: -15%;
  left: 20%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.3) 0%, rgba(67, 56, 202, 0.05) 70%, transparent 100%);
  animation: floatOrb3 32s ease-in-out infinite alternate;
}

.cyber-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(56, 189, 248, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(56, 189, 248, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 40%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, black 40%, transparent 85%);
}

@keyframes floatOrb1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 80px) scale(1.1); }
  100% { transform: translate(-40px, 120px) scale(0.95); }
}

@keyframes floatOrb2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, -60px) scale(1.15); }
  100% { transform: translate(40px, 70px) scale(0.9); }
}

@keyframes floatOrb3 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(70px, -50px) scale(1.08); }
  100% { transform: translate(-60px, 40px) scale(0.92); }
}

/* ===================================================================
   顶部导航栏 (左上 Logo 规范展示)
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(4, 8, 20, 0.78);
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
  transition: all var(--transition-fast);
}

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

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

.brand-logo-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: contain;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.45));
  flex-shrink: 0;
}

.nav-brand:hover .brand-logo-img {
  transform: scale(1.08);
  filter: drop-shadow(0 0 16px rgba(56, 189, 248, 0.75));
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.5px;
  color: #ffffff;
}

.brand-highlight {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-tagline {
  font-size: 11px;
  font-weight: 500;
  color: #94a3b8;
  letter-spacing: 0.4px;
  margin-top: 3px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: rgba(56, 189, 248, 0.08);
}

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

/* 按钮规范体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  transition: all var(--transition-smooth);
  border: 1px solid transparent;
  line-height: 1;
}

.btn-primary {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 60%, #0369a1 100%);
  color: #ffffff;
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 4px 18px var(--primary-glow), inset 0 1px 1px rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 60%, #0284c7 100%);
  box-shadow: 0 6px 24px rgba(56, 189, 248, 0.6), inset 0 1px 1px rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-main);
  border-color: rgba(148, 163, 184, 0.25);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(30, 41, 59, 0.9);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-gold {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #0b1120;
  font-weight: 700;
  border-color: rgba(251, 191, 36, 0.6);
  box-shadow: 0 4px 18px var(--accent-gold-glow);
}

.btn-gold:hover {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.6);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13.5px;
}

.btn-md {
  padding: 12px 24px;
  font-size: 15px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16.5px;
  letter-spacing: 0.3px;
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   通用章节排版
   =================================================================== */
.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background: linear-gradient(180deg, rgba(8, 14, 32, 0.45) 0%, rgba(4, 8, 20, 0.75) 100%);
  border-top: 1px solid rgba(56, 189, 248, 0.08);
  border-bottom: 1px solid rgba(56, 189, 248, 0.08);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.1);
  padding: 5px 14px;
  border-radius: 9999px;
  border: 1px solid rgba(56, 189, 248, 0.25);
  margin-bottom: 14px;
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===================================================================
   首屏 Hero 模块
   =================================================================== */
.hero-section {
  padding: 85px 0 65px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.35);
  padding: 7px 18px;
  border-radius: 9999px;
  font-size: 13.5px;
  font-weight: 600;
  color: #e0f2fe;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
  margin-bottom: 26px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}

.hero-highlight {
  background: linear-gradient(135deg, #ffffff 10%, #38bdf8 55%, #f59e0b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  max-width: 820px;
  margin: 0 auto 36px;
  font-size: 18px;
  line-height: 1.7;
  color: #cbd5e1;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1060px;
  margin: 0 auto;
}

.hero-stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  text-align: center;
  transition: all var(--transition-fast);
}

.hero-stat-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.12);
}

.hero-stat-val {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.hero-stat-label {
  font-size: 13.5px;
  color: var(--text-muted);
}

/* ===================================================================
   价格套餐模块 (严格规范：所有价格要同排！)
   =================================================================== */
.pricing-section {
  position: relative;
}

/* 4列等宽，所有套餐横向同排 */
.pricing-row-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 30px 24px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
}

.pricing-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(4, 8, 20, 0.6), 0 0 20px rgba(56, 189, 248, 0.15);
}

/* 主推款高亮 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(14, 28, 58, 0.88) 0%, rgba(13, 20, 38, 0.85) 100%);
  border: 2px solid #38bdf8;
  box-shadow: 0 16px 40px rgba(56, 189, 248, 0.25);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: 0 20px 48px rgba(56, 189, 248, 0.35);
}

.plan-top-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #0b1120;
  font-size: 11.5px;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 9999px;
  white-space: nowrap;
  box-shadow: 0 3px 12px rgba(245, 158, 11, 0.4);
}

.plan-tier-badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.12);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.pricing-card.featured .plan-tier-badge {
  color: #fbbf24;
  background: rgba(251, 191, 36, 0.15);
}

.plan-name {
  font-size: 21px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-target {
  font-size: 12.5px;
  color: var(--text-muted);
  min-height: 38px;
  line-height: 1.5;
  margin-bottom: 20px;
}

/* 核心对齐：所有价格同一水平基线对齐 */
.pricing-figure {
  display: flex;
  align-items: baseline;
  justify-content: flex-start;
  gap: 4px;
  padding: 16px 0;
  border-top: 1px dashed rgba(148, 163, 184, 0.18);
  border-bottom: 1px dashed rgba(148, 163, 184, 0.18);
  margin-bottom: 22px;
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.price-num {
  font-size: 40px;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  font-family: var(--font-mono);
}

.pricing-card.featured .price-num {
  color: #fde047;
}

.price-cycle {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-left: 2px;
}

.pricing-features {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
}

.pricing-features li {
  font-size: 13.5px;
  color: #cbd5e1;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  line-height: 1.45;
}

.pricing-features li strong {
  color: #ffffff;
}

.check-icon {
  color: #10b981;
  font-weight: 800;
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 1px;
}

.pricing-card-footer {
  margin-top: auto;
}

.pricing-tip {
  text-align: center;
  font-size: 11.5px;
  color: var(--text-sub);
  margin-top: 10px;
}

/* ===================================================================
   核心优势模块 (Features)
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all var(--transition-smooth);
}

.feature-box:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.12);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(3, 105, 161, 0.25) 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===================================================================
   延迟测速与网络监控 (Speedtest Table)
   =================================================================== */
.speedtest-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(4, 8, 20, 0.5);
}

.speedtest-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.speedtest-table th {
  background: rgba(15, 23, 42, 0.9);
  padding: 16px 20px;
  color: #e2e8f0;
  font-weight: 700;
  border-bottom: 1px solid rgba(56, 189, 248, 0.15);
}

.speedtest-table td {
  padding: 16px 20px;
  color: #cbd5e1;
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

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

.node-region {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: #ffffff;
}

.badge-tag {
  font-size: 11.5px;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.badge-green {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-blue {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.speed-bar {
  width: 120px;
  height: 6px;
  background: rgba(148, 163, 184, 0.18);
  border-radius: 9999px;
  overflow: hidden;
  margin-top: 4px;
}

.speed-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #38bdf8, #10b981);
  border-radius: 9999px;
}

/* ===================================================================
   全平台客户端一览 (Client Grid)
   =================================================================== */
.client-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

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

.client-os-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.client-name {
  font-size: 16.5px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.client-app {
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 8px;
}

.client-desc {
  font-size: 12.5px;
  color: var(--text-muted);
}

/* ===================================================================
   资讯与文章精选模块 (Articles Preview)
   =================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

.article-preview-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(4, 8, 20, 0.6), 0 0 20px rgba(56, 189, 248, 0.1);
}

.article-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.article-mini-tag {
  font-size: 11px;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.article-preview-title {
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: #ffffff;
}

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

.article-preview-snippet {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-preview-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-sub);
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding-top: 14px;
}

.read-more-link {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  text-decoration: underline;
}

/* ===================================================================
   用户评价模块 (User Reviews)
   =================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

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

.review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

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

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ffffff;
  font-size: 16px;
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.reviewer-name {
  font-size: 14.5px;
  font-weight: 700;
  color: #ffffff;
}

.reviewer-role {
  font-size: 12px;
  color: var(--text-muted);
}

.review-stars {
  color: #fbbf24;
  font-size: 14px;
  letter-spacing: 2px;
}

.review-content {
  font-size: 13.5px;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 14px;
  flex-grow: 1;
}

.review-badge-tag {
  font-size: 11px;
  color: var(--accent-gold);
  background: rgba(245, 158, 11, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
  align-self: flex-start;
  font-weight: 600;
}

/* ===================================================================
   常见问题 FAQ (手风琴纯 CSS/轻量支持)
   =================================================================== */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: all var(--transition-fast);
}

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

.faq-question {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.faq-q-mark {
  color: var(--primary);
  font-weight: 900;
  font-size: 17px;
  flex-shrink: 0;
}

.faq-answer {
  font-size: 13.8px;
  color: var(--text-muted);
  line-height: 1.65;
  padding-left: 24px;
}

.faq-answer strong {
  color: #e2e8f0;
}

/* ===================================================================
   权威外链与资源聚合
   =================================================================== */
.outbound-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.outbound-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all var(--transition-fast);
}

.outbound-card:hover {
  border-color: var(--primary);
  background: rgba(30, 41, 59, 0.8);
  transform: translateY(-2px);
}

.outbound-icon {
  font-size: 22px;
}

.outbound-title {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
}

.outbound-desc {
  font-size: 11.5px;
  color: var(--text-sub);
}

/* ===================================================================
   页脚 (Footer)
   =================================================================== */
.site-footer {
  background: #02040a;
  border-top: 1px solid rgba(56, 189, 248, 0.12);
  padding: 65px 0 35px;
  color: var(--text-muted);
  font-size: 13.5px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 45px;
}

.footer-brand img {
  height: 40px;
  width: auto;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-sub);
  max-width: 320px;
  margin-bottom: 16px;
}

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

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

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-keywords-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-keywords-cloud a, .footer-keywords-cloud span {
  font-size: 12px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.12);
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--text-sub);
}

.footer-keywords-cloud a:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  padding-top: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-sub);
  flex-wrap: wrap;
  gap: 14px;
}

.footer-bottom-links {
  display: flex;
  gap: 18px;
}

/* ===================================================================
   响应式断点适配 (移动端与平板端平滑自适应)
   =================================================================== */
@media (max-width: 1080px) {
  .hero-title {
    font-size: 40px;
  }
  
  .pricing-row-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  .nav-menu {
    display: none; /* 移动端精简模式 */
  }

  .hero-title {
    font-size: 30px;
  }

  .hero-desc {
    font-size: 15px;
  }

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

  .pricing-row-container {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: none;
  }

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

  .client-grid, .outbound-grid {
    grid-template-columns: 1fr;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
  }

  .speedtest-wrapper {
    overflow-x: auto;
  }
}

/* ===================================================================
   动态背景热气球系统 (Hot Air Balloon Sky Cruise)
   纯 CSS3 硬件加速 · 随风起伏与光影微摆
   =================================================================== */
.balloon-wrapper {
  position: absolute;
  pointer-events: none;
  z-index: 1;
  user-select: none;
}

/* 主热气球 (右上近景巡航) */
.balloon-main {
  top: 10%;
  right: 6%;
  width: 125px;
  height: 170px;
  filter: drop-shadow(0 14px 30px rgba(56, 189, 248, 0.35));
  animation: balloonMainFloat 22s ease-in-out infinite alternate;
}

/* 远景小热气球 (左侧深空漫游，营造深邃景深) */
.balloon-distant {
  top: 22%;
  left: 7%;
  width: 58px;
  height: 80px;
  opacity: 0.45;
  filter: drop-shadow(0 8px 18px rgba(245, 158, 11, 0.25));
  animation: balloonDistantFloat 32s ease-in-out infinite alternate;
}

.balloon-img {
  width: 100%;
  height: 100%;
  display: block;
}

/* 主气球微摆与升降浮动动画 */
@keyframes balloonMainFloat {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg);
  }
  25% {
    transform: translate3d(-35px, -40px, 0) rotate(-2deg);
  }
  50% {
    transform: translate3d(-65px, -10px, 0) rotate(2deg);
  }
  75% {
    transform: translate3d(-25px, -55px, 0) rotate(-1deg);
  }
  100% {
    transform: translate3d(20px, -25px, 0) rotate(1.5deg);
  }
}

/* 远景气球慢速漂移 */
@keyframes balloonDistantFloat {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg) scale(0.95);
  }
  50% {
    transform: translate3d(50px, -45px, 0) rotate(2.5deg) scale(1.05);
  }
  100% {
    transform: translate3d(-30px, 30px, 0) rotate(-2deg) scale(0.9);
  }
}

@media (max-width: 768px) {
  .balloon-main {
    top: 5%;
    right: 3%;
    width: 68px;
    height: 92px;
    opacity: 0.65;
  }
  .balloon-distant {
    display: none;
  }
}

/* ===================================================================
   动态背景黄色微光圆点点缀系统 (Yellow Glow Stardust Dots)
   纯 CSS3 呼吸微光与轻盈浮动 · 烘托温馨深邃的星空氛围
   =================================================================== */
.yellow-dots-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.gold-dot {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, #fef08a 15%, #facc15 50%, #f59e0b 85%);
  filter: drop-shadow(0 0 8px rgba(250, 204, 21, 0.85));
  pointer-events: none;
  opacity: 0.75;
  animation: goldDotPulse 5.5s ease-in-out infinite alternate;
}

/* 带有更强外晕的大中型黄色光斑 */
.gold-dot.dot-lg {
  box-shadow: 0 0 14px rgba(251, 191, 36, 0.85), 0 0 28px rgba(245, 158, 11, 0.4);
}

.gold-dot:nth-child(2n) {
  animation-duration: 6.8s;
  animation-delay: 1.1s;
}

.gold-dot:nth-child(3n) {
  animation-duration: 4.6s;
  animation-delay: 2.3s;
}

.gold-dot:nth-child(5n) {
  animation-duration: 7.4s;
  animation-delay: 3.5s;
}

@keyframes goldDotPulse {
  0% {
    transform: translate3d(0, 0, 0) scale(0.8);
    opacity: 0.3;
  }
  50% {
    transform: translate3d(8px, -16px, 0) scale(1.25);
    opacity: 0.95;
    filter: drop-shadow(0 0 12px rgba(253, 224, 71, 0.95));
  }
  100% {
    transform: translate3d(-6px, -28px, 0) scale(0.85);
    opacity: 0.4;
  }
}