/* ===================================================================
   红杏云机场官网 - 日落极光流体风 (Sunset Aurora / Liquid Chrome)
   Core Design System & Stylesheet
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
  /* 日落极光核心色盘 */
  --coral-orange: #FF5E3A;
  --coral-orange-glow: rgba(255, 94, 58, 0.45);
  --dusk-violet-deep: #0D0414;
  --dusk-violet-dark: #160824;
  --dusk-violet-mid: #2A0E45;
  --dusk-violet-light: #5A1C80;
  --golden-hour: #FFB347;
  --golden-hour-glow: rgba(255, 179, 71, 0.55);
  --liquid-silver: #F8FAFC;
  --chrome-highlight: #FFF1E6;
  
  /* 界面中性与辅助色 */
  --bg-primary: #0A020F;
  --surface-card: rgba(28, 12, 42, 0.65);
  --surface-card-hover: rgba(38, 16, 56, 0.85);
  --border-subtle: rgba(255, 140, 105, 0.18);
  --border-focus: rgba(255, 179, 71, 0.6);
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 235, 225, 0.78);
  --text-muted: rgba(220, 195, 235, 0.55);

  /* 状态指示色 */
  --status-online: #10B981;
  --status-online-glow: rgba(16, 185, 129, 0.4);
  --status-warning: #F59E0B;
  --status-busy: #EF4444;

  /* 阴影与景深 */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.65);
  --shadow-aurora: 0 0 40px rgba(255, 94, 58, 0.2), 0 0 70px rgba(90, 28, 128, 0.3);

  /* 动效过渡 */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Outfit', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* 动态背景容器 (Fluid Aurora Background) */
#aurora-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.88;
}

.aurora-ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none;
  background: 
    radial-gradient(circle at 15% 20%, rgba(255, 94, 58, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 85% 35%, rgba(90, 28, 128, 0.25) 0%, transparent 50%),
    radial-gradient(circle at 50% 85%, rgba(255, 179, 71, 0.15) 0%, transparent 50%),
    linear-gradient(180deg, rgba(10, 2, 15, 0.2) 0%, rgba(10, 2, 15, 0.85) 100%);
  mix-blend-mode: screen;
}

/* 内容层置于背景之上 */
.page-wrapper {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 通用容器规范 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===================================================================
   顶部公告栏 (Top Announcement Banner)
   =================================================================== */
.top-announcement {
  background: linear-gradient(90deg, #3A0D42 0%, #FF5E3A 50%, #FFB347 100%);
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  text-align: center;
  position: relative;
  z-index: 100;
  box-shadow: 0 2px 15px rgba(255, 94, 58, 0.35);
  letter-spacing: 0.3px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.top-announcement .badge-pulse {
  background: rgba(255, 255, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.5);
  padding: 0.15rem 0.55rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  text-transform: uppercase;
  animation: pulse-glow 2s infinite ease-in-out;
}

.top-announcement a {
  color: #FFF;
  text-decoration: underline;
  margin-left: 0.5rem;
  font-weight: 700;
  transition: opacity var(--transition-fast);
}

.top-announcement a:hover {
  opacity: 0.85;
}

/* ===================================================================
   顶部导航栏 (Navbar)
   =================================================================== */
.navbar-header {
  position: sticky;
  top: 0;
  z-index: 99;
  background: rgba(13, 4, 20, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-base), border var(--transition-base);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-symbol {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--coral-orange) 0%, var(--dusk-violet-light) 60%, var(--golden-hour) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--coral-orange-glow);
  position: relative;
  overflow: hidden;
}

.logo-symbol::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.5) 50%, transparent 60%);
  animation: logo-shimmer 4s infinite linear;
}

.logo-symbol svg {
  width: 1.4rem;
  height: 1.4rem;
  fill: #FFFFFF;
  position: relative;
  z-index: 2;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #FFF 0%, #FFE5D9 40%, var(--golden-hour) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tag {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--golden-hour);
  background: rgba(255, 179, 71, 0.12);
  border: 1px solid rgba(255, 179, 71, 0.3);
  padding: 0.1rem 0.45rem;
  border-radius: 6px;
  margin-left: 0.35rem;
}

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

.nav-item a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.4rem 0;
}

.nav-item a:hover {
  color: #FFFFFF;
}

.nav-item a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--coral-orange), var(--golden-hour));
  border-radius: 2px;
  transition: width var(--transition-base);
}

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

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

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #FFF;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle svg {
  width: 1.6rem;
  height: 1.6rem;
}

/* ===================================================================
   暗金悬浮药丸按钮 (Dark Gold Floating Pill Button)
   =================================================================== */
.btn-gold-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  background: linear-gradient(135deg, #1C0728 0%, #350E42 50%, #1A0526 100%);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.975rem;
  padding: 0.75rem 1.75rem;
  border-radius: 9999px;
  border: 1.5px solid rgba(255, 186, 73, 0.85);
  box-shadow: 
    0 0 20px rgba(255, 94, 58, 0.35),
    0 0 40px rgba(255, 179, 71, 0.2),
    inset 0 0 12px rgba(255, 193, 7, 0.2);
  cursor: pointer;
  overflow: hidden;
  transition: all var(--transition-base);
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.btn-gold-pill::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 235, 180, 0.35), transparent);
  transition: left 0.75s ease;
}

.btn-gold-pill:hover {
  transform: translateY(-2px) scale(1.02);
  border-color: #FFD166;
  box-shadow: 
    0 0 30px rgba(255, 94, 58, 0.55),
    0 0 60px rgba(255, 179, 71, 0.4),
    inset 0 0 18px rgba(255, 213, 79, 0.35);
  color: #FFFFFF;
}

.btn-gold-pill:hover::before {
  left: 100%;
}

.btn-gold-pill.btn-large {
  padding: 1rem 2.4rem;
  font-size: 1.125rem;
}

.btn-ghost-sunset {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFF;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.btn-ghost-sunset:hover {
  background: rgba(255, 94, 58, 0.15);
  border-color: var(--coral-orange);
  color: var(--golden-hour);
  transform: translateY(-2px);
}

/* ===================================================================
   液体金属文字 (Liquid Chrome Typography)
   =================================================================== */
.liquid-chrome-title {
  font-size: clamp(2.4rem, 5.5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  background: linear-gradient(135deg, 
    #FFFFFF 0%, 
    #F3E8FF 20%, 
    #FFC599 38%, 
    #FFFFFF 55%, 
    #D8B4E2 72%, 
    #FFA87A 88%, 
    #FFFFFF 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.75)) drop-shadow(0 0 25px rgba(255, 94, 58, 0.35));
  animation: chrome-shine 7s infinite ease-in-out;
  margin-bottom: 1.25rem;
}

@keyframes chrome-shine {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes logo-shimmer {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.9; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.97); }
}

/* ===================================================================
   Hero 英雄区
   =================================================================== */
.hero-section {
  padding: 5rem 0 4.5rem;
  position: relative;
  text-align: center;
}

.hero-content {
  max-width: 920px;
  margin: 0 auto;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.1rem;
  background: rgba(42, 14, 69, 0.7);
  border: 1px solid rgba(255, 179, 71, 0.4);
  border-radius: 9999px;
  color: var(--golden-hour);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.8rem;
  backdrop-filter: blur(12px);
  box-shadow: 0 0 18px rgba(255, 94, 58, 0.2);
}

.hero-pill-badge .sparkle {
  color: var(--coral-orange);
}

.hero-subtitle-quote {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.hero-subtitle-quote .highlight-sunset {
  color: var(--golden-hour);
  font-weight: 700;
  text-shadow: 0 0 12px rgba(255, 179, 71, 0.4);
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 740px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

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

/* Hero 悬浮数据指示条 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  max-width: 1040px;
  margin: 0 auto;
}

.stat-card-glass {
  background: var(--surface-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 1.35rem 1rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.stat-card-glass:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 179, 71, 0.4);
  box-shadow: 0 12px 30px rgba(255, 94, 58, 0.25);
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: #FFF;
  background: linear-gradient(135deg, #FFF 0%, var(--golden-hour) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===================================================================
   板块通用头部 (Section Headers)
   =================================================================== */
.section-wrapper {
  padding: 5.5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--coral-orange);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.85rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #FFF;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.section-title .gradient-text {
  background: linear-gradient(135deg, #FFF 0%, var(--coral-orange) 50%, var(--golden-hour) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

/* ===================================================================
   板块 1: 节点延迟与状态 (Node Latency & Status)
   =================================================================== */
.node-dashboard {
  background: var(--surface-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: var(--shadow-lg), var(--shadow-aurora);
}

.dashboard-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
  gap: 1rem;
}

.status-summary {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #FFF;
}

.indicator-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--status-online);
  box-shadow: 0 0 10px var(--status-online);
  animation: pulse-dot 1.8s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

.node-filter-tabs {
  display: flex;
  gap: 0.5rem;
  background: rgba(15, 5, 25, 0.6);
  padding: 0.3rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.filter-tab {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab.active, .filter-tab:hover {
  background: linear-gradient(135deg, var(--coral-orange), var(--dusk-violet-light));
  color: #FFF;
  box-shadow: 0 2px 10px rgba(255, 94, 58, 0.3);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
}

.node-card {
  background: rgba(16, 6, 26, 0.65);
  border: 1px solid rgba(255, 140, 105, 0.12);
  border-radius: 16px;
  padding: 1.25rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.node-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 179, 71, 0.4);
  background: rgba(30, 12, 45, 0.75);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.node-flag {
  font-size: 1.5rem;
}

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

.node-protocol-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: rgba(255, 94, 58, 0.15);
  border: 1px solid rgba(255, 94, 58, 0.3);
  color: var(--golden-hour);
}

.node-metrics {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.metric-value {
  font-size: 1.15rem;
  font-weight: 800;
  color: #10B981;
}

.metric-value.ping-great {
  color: #10B981;
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.metric-value.ping-good {
  color: var(--golden-hour);
}

.metric-loss {
  font-size: 0.85rem;
  font-weight: 700;
  color: #10B981;
}

.load-bar-wrap {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  margin-top: 0.6rem;
  overflow: hidden;
}

.load-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, #10B981, var(--golden-hour));
  transition: width 0.8s ease;
}

/* ===================================================================
   板块 2: 套餐价格板块 (Pricing Plans)
   =================================================================== */
.pricing-billing-switch {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.switch-container {
  display: flex;
  background: rgba(25, 10, 38, 0.8);
  border: 1px solid rgba(255, 179, 71, 0.25);
  padding: 0.35rem;
  border-radius: 9999px;
  position: relative;
}

.billing-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.55rem 1.4rem;
  border-radius: 9999px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.billing-btn.active {
  background: linear-gradient(135deg, var(--coral-orange) 0%, var(--dusk-violet-light) 100%);
  color: #FFF;
  box-shadow: 0 2px 14px rgba(255, 94, 58, 0.4);
}

.discount-pill {
  background: linear-gradient(90deg, #FF5E3A, #FFB347);
  color: #FFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  margin-left: 0.4rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--surface-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 22px;
  padding: 2.2rem 1.6rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-base);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 179, 71, 0.5);
  box-shadow: 0 20px 45px rgba(255, 94, 58, 0.25);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(46, 17, 70, 0.85) 0%, rgba(26, 8, 40, 0.9) 100%);
  border: 2px solid var(--golden-hour);
  box-shadow: 0 0 35px rgba(255, 179, 71, 0.35);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--coral-orange), var(--golden-hour));
  color: #1A0728;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.3rem 1.1rem;
  border-radius: 9999px;
  box-shadow: 0 4px 12px rgba(255, 94, 58, 0.4);
}

.plan-header {
  margin-bottom: 1.5rem;
}

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

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 2.5rem;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  margin-bottom: 1.8rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.price-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--golden-hour);
}

.price-number {
  font-size: 2.75rem;
  font-weight: 900;
  color: #FFF;
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.feature-item svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: var(--golden-hour);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.pricing-card .btn-gold-pill {
  width: 100%;
}

/* ===================================================================
   板块 3: 核心优势板块 (Core Advantages)
   =================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.advantage-card {
  background: var(--surface-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 2.2rem;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--coral-orange), var(--golden-hour), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.advantage-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 179, 71, 0.45);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(255, 94, 58, 0.15);
}

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

.advantage-icon-wrap {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(255, 94, 58, 0.2) 0%, rgba(90, 28, 128, 0.4) 100%);
  border: 1px solid rgba(255, 179, 71, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 20px rgba(255, 94, 58, 0.25);
}

.advantage-icon-wrap svg {
  width: 1.8rem;
  height: 1.8rem;
  fill: var(--golden-hour);
}

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

.advantage-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================================================
   板块 4: 常见问题板块 (FAQ)
   =================================================================== */
.faq-wrapper {
  max-width: 860px;
  margin: 0 auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--surface-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: rgba(255, 179, 71, 0.35);
}

.faq-item.active {
  border-color: rgba(255, 179, 71, 0.6);
  background: rgba(35, 15, 52, 0.85);
  box-shadow: 0 8px 30px rgba(255, 94, 58, 0.15);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.35rem 1.6rem;
  background: transparent;
  border: none;
  color: #FFF;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  gap: 1rem;
}

.faq-icon-arrow {
  width: 1.4rem;
  height: 1.4rem;
  fill: var(--golden-hour);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

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

.faq-answer-pane {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  padding: 0 1.6rem;
}

.faq-item.active .faq-answer-pane {
  padding: 0 1.6rem 1.4rem;
  max-height: 600px;
}

/* ===================================================================
   板块 5: 用户评价板块 (Testimonials)
   =================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial-card {
  background: var(--surface-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 179, 71, 0.45);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.5);
}

.testimonial-stars {
  display: flex;
  gap: 0.3rem;
  color: var(--golden-hour);
  margin-bottom: 1.1rem;
}

.testimonial-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: normal;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.author-avatar {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--coral-orange), var(--dusk-violet-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 0 12px rgba(255, 94, 58, 0.3);
}

.author-meta {
  display: flex;
  flex-direction: column;
}

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

.author-role {
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* ===================================================================
   知识库专属页面样式 (Knowledge Base Hub & Articles)
   =================================================================== */
.kb-hero-section {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  position: relative;
}

.kb-search-box {
  max-width: 620px;
  margin: 2rem auto 2.5rem;
  position: relative;
}

.kb-search-input {
  width: 100%;
  padding: 1.1rem 1.6rem 1.1rem 3.2rem;
  background: rgba(25, 10, 40, 0.85);
  border: 1.5px solid rgba(255, 179, 71, 0.35);
  border-radius: 9999px;
  color: #FFF;
  font-size: 1rem;
  outline: none;
  box-shadow: 0 0 25px rgba(255, 94, 58, 0.2);
  transition: all var(--transition-base);
}

.kb-search-input:focus {
  border-color: var(--golden-hour);
  box-shadow: 0 0 35px rgba(255, 179, 71, 0.4);
}

.kb-search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.25rem;
  height: 1.25rem;
  fill: var(--text-muted);
}

.kb-tags-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.kb-tag-btn {
  background: rgba(40, 15, 60, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  color: var(--text-secondary);
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.kb-tag-btn:hover, .kb-tag-btn.active {
  background: linear-gradient(135deg, var(--coral-orange), var(--dusk-violet-light));
  color: #FFF;
  border-color: transparent;
  box-shadow: 0 2px 10px rgba(255, 94, 58, 0.3);
}

.kb-articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.kb-article-card {
  background: var(--surface-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  transition: all var(--transition-base);
}

.kb-article-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 179, 71, 0.5);
  box-shadow: 0 16px 40px rgba(255, 94, 58, 0.25);
  background: var(--surface-card-hover);
}

.kb-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.kb-badge {
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  background: rgba(255, 94, 58, 0.15);
  border: 1px solid rgba(255, 94, 58, 0.3);
  color: var(--golden-hour);
}

.kb-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: #FFF;
  line-height: 1.4;
  margin-bottom: 0.85rem;
  transition: color var(--transition-fast);
}

.kb-article-card:hover .kb-card-title {
  color: var(--golden-hour);
}

.kb-card-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.kb-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.825rem;
  color: var(--text-muted);
}

.read-more-link {
  color: var(--golden-hour);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* ===================================================================
   知识库单篇文章正文排版 (Single Article Page)
   =================================================================== */
.article-reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3.5px;
  background: linear-gradient(90deg, var(--coral-orange), var(--golden-hour));
  z-index: 1000;
  width: 0%;
  transition: width 0.1s;
}

.article-header {
  padding: 4.5rem 0 2.5rem;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 3rem;
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 1.2rem;
  flex-wrap: wrap;
}

.article-content-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3.5rem;
  align-items: start;
  margin-bottom: 5rem;
}

.article-sidebar {
  position: sticky;
  top: 6rem;
  background: var(--surface-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 1.5rem;
}

.toc-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--golden-hour);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.toc-item a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.4;
  transition: color var(--transition-fast);
  display: block;
}

.toc-item a:hover {
  color: var(--golden-hour);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #E2D9EC;
}

.article-body h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: #FFF;
  margin: 2.8rem 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 179, 71, 0.2);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.article-body h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.4rem;
  background: linear-gradient(180deg, var(--coral-orange), var(--golden-hour));
  border-radius: 2px;
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--golden-hour);
  margin: 2rem 0 0.85rem;
}

.article-body p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.article-body blockquote {
  background: rgba(42, 14, 69, 0.5);
  border-left: 4px solid var(--coral-orange);
  padding: 1.25rem 1.5rem;
  border-radius: 0 12px 12px 0;
  margin: 2rem 0;
  font-style: italic;
  color: #FFE5D9;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(20, 8, 32, 0.75);
  text-align: left;
}

.article-table th {
  background: rgba(42, 14, 69, 0.9);
  padding: 1rem 1.25rem;
  font-weight: 700;
  color: var(--golden-hour);
  border-bottom: 1px solid rgba(255, 179, 71, 0.25);
}

.article-table td {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.article-table tr:hover td {
  background: rgba(255, 94, 58, 0.08);
}

.article-callout-box {
  background: linear-gradient(135deg, rgba(46, 17, 70, 0.85) 0%, rgba(26, 8, 40, 0.85) 100%);
  border: 1px solid rgba(255, 179, 71, 0.4);
  border-radius: 16px;
  padding: 1.75rem;
  margin: 2.5rem 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.article-callout-title {
  font-weight: 800;
  font-size: 1.15rem;
  color: #FFF;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===================================================================
   底部通用版权与导航 (Footer)
   注意：严格禁止出现 robots.txt 和 sitemap.xml 链接
   =================================================================== */
.main-footer {
  background: rgba(9, 2, 14, 0.95);
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2rem;
  position: relative;
  z-index: 10;
}

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

.footer-brand-desc {
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 340px;
}

.footer-column-title {
  font-size: 1rem;
  font-weight: 700;
  color: #FFF;
  margin-bottom: 1.25rem;
  letter-spacing: 0.5px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-list a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--golden-hour);
}

.footer-bottom-bar {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===================================================================
   响应式适配 (Responsive Media Queries)
   =================================================================== */
@media (max-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .kb-articles-grid {
    grid-template-columns: 1fr;
  }
  .article-content-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    display: none;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 4.5rem;
    left: 0;
    width: 100%;
    background: rgba(13, 4, 20, 0.98);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    gap: 1rem;
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom-bar {
    flex-direction: column;
    text-align: center;
  }
}