/* ==========================================================================
   Nexitally (奶昔机场) Official Landing Page Stylesheet
   Pure Native CSS - Ultra Fast Sub-Second Loading (nexitally.casa)
   Zero Heavy External JS Frameworks - Maximum Performance & SEO Score
   ========================================================================== */

:root {
  --bg-dark: #050814;
  --bg-surface: #0a0f26;
  --bg-card: rgba(14, 21, 48, 0.75);
  --bg-card-hover: rgba(22, 34, 72, 0.9);
  --bg-card-featured: rgba(26, 24, 66, 0.92);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.15);
  --border-highlight: rgba(255, 45, 135, 0.5);
  --border-cyan: rgba(0, 242, 254, 0.45);
  
  --primary: #ff2d87;
  --primary-rgb: 255, 45, 135;
  --primary-light: #ff758c;
  --secondary: #00f2fe;
  --secondary-rgb: 0, 242, 254;
  --accent-purple: #7928ca;
  --accent-violet: #8b5cf6;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 35px rgba(255, 45, 135, 0.28);
  --shadow-glow-cyan: 0 0 35px rgba(0, 242, 254, 0.25);
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ==========================================================================
   DYNAMIC BACKGROUND (动态科技光晕与离子矩阵 - Pure Native Animated Background)
   ========================================================================== */
.bg-dynamic-wrap {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

#bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.85;
  display: block;
}

.dynamic-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(95px);
  opacity: 0.28;
  will-change: transform;
  pointer-events: none;
}

.dynamic-orb-1 {
  top: -10%;
  left: 10%;
  width: 580px;
  height: 580px;
  background: radial-gradient(circle, rgba(255, 45, 135, 0.45) 0%, rgba(121, 40, 202, 0.15) 60%, transparent 80%);
  animation: orbFloat1 22s infinite alternate ease-in-out;
}

.dynamic-orb-2 {
  top: 38%;
  right: -5%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.38) 0%, rgba(59, 130, 246, 0.12) 60%, transparent 80%);
  animation: orbFloat2 26s infinite alternate ease-in-out;
}

.dynamic-orb-3 {
  bottom: -15%;
  left: 20%;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.35) 0%, rgba(255, 117, 140, 0.1) 60%, transparent 80%);
  animation: orbFloat3 30s infinite alternate ease-in-out;
}

.cyber-grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.8) 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.8) 0%, transparent 80%);
}

@keyframes orbFloat1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 80px) scale(1.12); }
  100% { transform: translate(-40px, 120px) scale(0.95); }
}

@keyframes orbFloat2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, -60px) scale(1.1); }
  100% { transform: translate(40px, -90px) scale(0.92); }
}

@keyframes orbFloat3 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(50px, -50px) scale(1.08); }
  100% { transform: translate(-70px, 30px) scale(0.98); }
}

/* ==========================================================================
   LAYOUT CONTAINERS & TYPOGRAPHY
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.section-py {
  padding: 5.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3.5rem;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary-light);
  background: rgba(255, 45, 135, 0.1);
  border: 1px solid rgba(255, 45, 135, 0.28);
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.section-badge.badge-cyan {
  color: var(--secondary);
  background: rgba(0, 242, 254, 0.1);
  border-color: rgba(0, 242, 254, 0.28);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 40%, #e2e8f0 70%, #ff758c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   BUTTONS & CTA SPECIFICATION
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.98rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #ff2d87 0%, #ff758c 60%, #7928ca 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(255, 45, 135, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #ff4598 0%, #ff8da0 60%, #8c38df 100%);
  box-shadow: 0 6px 26px rgba(255, 45, 135, 0.55);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--border-light);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-cyan {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #030a1c;
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.35);
  font-weight: 800;
}

.btn-cyan:hover {
  box-shadow: 0 6px 26px rgba(0, 242, 254, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(255, 117, 140, 0.4);
  color: #fce7f3;
}

.btn-outline:hover {
  background: rgba(255, 45, 135, 0.15);
  border-color: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.55rem 1.15rem;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 1.05rem 2.2rem;
  font-size: 1.1rem;
}

/* ==========================================================================
   TOP BAR & HEADER (左上方要有这个logo)
   ========================================================================== */
.top-notice-bar {
  background: linear-gradient(90deg, #130924 0%, #290826 50%, #0d1b32 100%);
  border-bottom: 1px solid rgba(255, 45, 135, 0.25);
  padding: 0.45rem 1rem;
  font-size: 0.84rem;
  text-align: center;
  color: var(--text-muted);
  position: relative;
  z-index: 100;
}

.top-notice-bar strong {
  color: var(--primary-light);
}

.top-notice-bar a {
  color: var(--secondary);
  text-decoration: underline;
  margin-left: 0.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(5, 8, 20, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 99;
  transition: var(--transition);
}

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

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 0.75rem;
  outline: none;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  padding: 0.4rem 0;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.45rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 5.5rem 0 4.5rem;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1.1rem;
  background: rgba(255, 45, 135, 0.12);
  border: 1px solid rgba(255, 45, 135, 0.35);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: #fbcfe8;
  margin-bottom: 1.8rem;
  box-shadow: 0 0 20px rgba(255, 45, 135, 0.2);
}

.hero-pill .dot {
  width: 8px;
  height: 8px;
  background-color: var(--secondary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--secondary);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title-highlight {
  background: linear-gradient(135deg, #ff2d87 20%, #ff758c 50%, #00f2fe 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
}

.hero-subtitle strong {
  color: #ffffff;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 1040px;
  margin: 0 auto;
  padding: 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-item {
  text-align: center;
  padding: 0.5rem;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border-color);
}

.stat-num {
  font-size: 2.1rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #ffffff;
  line-height: 1.2;
}

.stat-num.highlight-pink {
  color: var(--primary-light);
}

.stat-num.highlight-cyan {
  color: var(--secondary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* ==========================================================================
   FEATURES SECTION
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.2rem 1.8rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
  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), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 45, 135, 0.35);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

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

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(255, 45, 135, 0.12);
  border: 1px solid rgba(255, 45, 135, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
  margin-bottom: 1.4rem;
}

.feature-icon-wrap.icon-cyan {
  background: rgba(0, 242, 254, 0.12);
  border-color: rgba(0, 242, 254, 0.28);
  color: var(--secondary);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

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

/* ==========================================================================
   REAL-TIME NODE LATENCY SIMULATOR
   ========================================================================== */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.3rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition);
}

.node-card:hover {
  border-color: rgba(0, 242, 254, 0.4);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.node-left {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.node-flag {
  font-size: 1.8rem;
  line-height: 1;
}

.node-name {
  font-weight: 700;
  font-size: 1rem;
  color: #ffffff;
}

.node-type {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

.node-right {
  text-align: right;
}

.node-ping {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--success);
}

.node-status {
  font-size: 0.76rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem;
  margin-top: 0.2rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  background-color: var(--success);
  border-radius: 50%;
  display: inline-block;
}

/* ==========================================================================
   PRICING SECTION: STRICTLY ALL 4 IN THE SAME ROW ("所有价格要同排")
   ========================================================================== */
.pricing-section {
  padding: 5.5rem 0;
  position: relative;
}

/* Pricing Switcher Tabs (31天月付 / 186天半年付 / 372天年付) */
.pricing-switcher-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 0 auto 2.5rem;
  background: rgba(14, 21, 48, 0.85);
  border: 1px solid var(--border-color);
  padding: 0.35rem;
  border-radius: var(--radius-full);
  max-width: 500px;
}

.pricing-switch-btn {
  flex: 1;
  padding: 0.6rem 1rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  text-align: center;
}

.pricing-switch-btn:hover {
  color: #ffffff;
}

.pricing-switch-btn.active {
  background: linear-gradient(135deg, #ff2d87, #7928ca);
  color: #ffffff;
  box-shadow: 0 2px 12px rgba(255, 45, 135, 0.45);
}

.pricing-grid-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 1.2rem;
}

/* Strict 4 Columns Same Row Grid - NEVER WRAP ("所有价格要同排") */
.pricing-grid {
  display: grid !important;
  grid-template-columns: repeat(4, 1fr) !important;
  min-width: 980px; /* Guarantees all 4 columns stay strictly in the SAME row without vertical wrapping */
  gap: 1.2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  position: relative;
}

/* Horizontal Full-Specs Comparison Table (全方案同排横向详细对比) */
.pricing-table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin-top: 3.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  backdrop-filter: blur(14px);
}

.pricing-table {
  width: 100%;
  min-width: 880px;
  border-collapse: collapse;
  text-align: center;
  font-size: 0.92rem;
}

.pricing-table th,
.pricing-table td {
  padding: 1rem 0.8rem;
  border-bottom: 1px solid var(--border-color);
}

.pricing-table th {
  font-weight: 800;
  color: #ffffff;
}

.pricing-table th:first-child,
.pricing-table td:first-child {
  text-align: left;
  font-weight: 700;
  color: var(--text-muted);
  width: 22%;
}

.pricing-table tr:hover td {
  background: rgba(255, 45, 135, 0.04);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 45, 135, 0.4);
  box-shadow: var(--shadow-glow);
}

.pricing-card.featured {
  background: var(--bg-card-featured);
  border: 2px solid var(--primary);
  box-shadow: 0 0 35px rgba(255, 45, 135, 0.35);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 0 0 45px rgba(255, 45, 135, 0.5);
}

.badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #ff2d87, #7928ca);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(255, 45, 135, 0.4);
}

.plan-header {
  margin-bottom: 1.4rem;
  text-align: center;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.4rem;
}

.plan-subtitle {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.plan-price-wrap {
  text-align: center;
  padding: 1.2rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary-light);
  vertical-align: super;
}

.plan-price {
  font-size: 3rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: #ffffff;
  letter-spacing: -0.03em;
}

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

.plan-billing-note {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 0.4rem;
}

.plan-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  line-height: 1.45;
}

.plan-feature-item svg {
  flex-shrink: 0;
  color: var(--success);
  margin-top: 0.15rem;
}

.plan-feature-item.highlight {
  color: #ffffff;
  font-weight: 600;
}

.plan-feature-item.highlight svg {
  color: var(--primary-light);
}

.plan-cta {
  margin-top: auto;
}

/* ==========================================================================
   CLIENT COMPATIBILITY & QUICK SETUP
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
  margin-bottom: 3.5rem;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.4rem;
  text-align: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition);
}

.client-card:hover {
  border-color: rgba(0, 242, 254, 0.4);
  transform: translateY(-4px);
}

.client-os-icon {
  width: 50px;
  height: 50px;
  margin: 0 auto 1rem;
  color: var(--secondary);
}

.client-os-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.client-recommended {
  font-size: 0.84rem;
  color: var(--primary-light);
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.client-apps {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem 1.6rem;
  position: relative;
}

.step-num {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.06);
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.step-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   ARTICLES SECTION (技术专栏与内部跳转)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 45, 135, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.9rem;
}

.article-tag {
  background: rgba(255, 45, 135, 0.12);
  color: var(--primary-light);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  color: #ffffff;
  margin-bottom: 0.85rem;
  transition: var(--transition);
}

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

.article-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.4rem;
  flex-grow: 1;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--secondary);
}

.article-read-more svg {
  transition: transform 0.2s;
}

.article-card:hover .article-read-more svg {
  transform: translateX(4px);
}

/* ==========================================================================
   USER REVIEWS / TESTIMONIALS (用户评价)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.6rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
}

.review-card:hover {
  border-color: rgba(255, 117, 140, 0.35);
  transform: translateY(-3px);
}

.review-rating {
  color: #fbbf24;
  margin-bottom: 1rem;
  display: flex;
  gap: 0.2rem;
}

.review-text {
  font-size: 0.94rem;
  color: var(--text-main);
  line-height: 1.7;
  margin-bottom: 1.4rem;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  color: #ffffff;
}

.author-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #ffffff;
}

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

/* ==========================================================================
   FAQ SECTION (常见问题)
   ========================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.faq-question {
  width: 100%;
  padding: 1.35rem 1.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  text-align: left;
  cursor: pointer;
}

.faq-toggle-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s;
  color: var(--primary-light);
  flex-shrink: 0;
  margin-left: 1rem;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  padding: 0 1.6rem;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  transition: max-height 0.4s ease-in-out;
  padding: 0 1.6rem 1.4rem;
}

.faq-answer p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ==========================================================================
   OUTBOUND LINKS & RESOURCES (优质外链与权威参考)
   ========================================================================== */
.resources-section {
  padding: 3.5rem 0;
  background: rgba(10, 15, 38, 0.45);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.2rem;
}

.resource-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem 0.8rem;
  text-align: center;
  text-decoration: none;
  color: var(--text-muted);
  transition: var(--transition);
  display: block;
}

.resource-card:hover {
  border-color: var(--secondary);
  color: #ffffff;
  transform: translateY(-2px);
}

.resource-name {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  color: #ffffff;
}

.resource-desc {
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: #03050c;
  border-top: 1px solid var(--border-color);
  padding: 4.5rem 0 2.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.footer-disclaimer {
  max-width: 650px;
  line-height: 1.6;
}

/* ==========================================================================
   ARTICLE SINGLE POST STYLES (文章详情页排版)
   ========================================================================== */
.article-post-header {
  padding: 4rem 0 2rem;
  text-align: center;
}

.article-breadcrumbs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.article-breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

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

.article-post-title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 1.2rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  color: #ffffff;
}

.article-post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-body-wrap {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 2.8rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: #ffffff;
  margin: 2.2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 1.6rem 0 0.8rem;
}

.article-content p {
  margin-bottom: 1.35rem;
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.5rem 1.8rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

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

.article-callout {
  background: rgba(255, 45, 135, 0.08);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.2rem 1.4rem;
  margin: 1.8rem 0;
  font-size: 0.95rem;
}

.article-callout.callout-cyan {
  background: rgba(0, 242, 254, 0.08);
  border-left-color: var(--secondary);
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(255, 45, 135, 0.15) 0%, rgba(121, 40, 202, 0.18) 100%);
  border: 1px solid rgba(255, 45, 135, 0.35);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  margin: 2.5rem 0;
}

.article-cta-box h4 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
  color: #ffffff;
}

.article-cta-box p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 1.2rem;
}

.related-articles-box {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.related-articles-box h3 {
  font-size: 1.25rem;
  margin-bottom: 1.2rem;
  color: #ffffff;
}

.related-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.related-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  transition: var(--transition);
}

.related-item:hover {
  border-color: var(--primary-light);
  background: rgba(255, 45, 135, 0.08);
}

.related-item a {
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  display: block;
}

/* ==========================================================================
   RESPONSIVE DESIGN (BREAKPOINTS)
   ========================================================================== */
@media (max-width: 1120px) {
  .features-grid,
  .articles-grid,
  .reviews-grid,
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .resources-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #090e24;
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
  }
  .nav-menu.show {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-title {
    font-size: 2.35rem;
  }
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  .features-grid,
  .articles-grid,
  .reviews-grid,
  .nodes-grid,
  .steps-grid,
  .clients-grid {
    grid-template-columns: 1fr;
  }
  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .article-body-wrap {
    padding: 1.8rem 1.4rem;
  }
  .article-post-title {
    font-size: 1.85rem;
  }
  .related-list {
    grid-template-columns: 1fr;
  }
}