:root {
  --bg-main: #0c0b09;
  --bg-card: rgba(26, 23, 19, 0.75);
  --bg-card-hover: rgba(38, 33, 26, 0.9);
  --bg-elevated: #181510;
  
  /* Champagne Gold Color Palette */
  --champagne-light: #fff2c6;
  --champagne-gold: #f5d77f;
  --champagne-primary: #e6be68;
  --champagne-deep: #b38838;
  --champagne-dark: #664d1c;
  --champagne-glow: rgba(230, 190, 104, 0.35);
  --champagne-subtle: rgba(230, 190, 104, 0.12);
  --champagne-border: rgba(230, 190, 104, 0.22);
  --champagne-border-bright: rgba(245, 215, 127, 0.6);

  --text-main: #fbf8f0;
  --text-secondary: #c9bea9;
  --text-muted: #8c8270;
  
  --gradient-gold: linear-gradient(135deg, #fff2c6 0%, #e6be68 50%, #b38838 100%);
  --gradient-gold-hover: linear-gradient(135deg, #ffffff 0%, #f7d78a 45%, #c79a40 100%);
  --gradient-shimmer: linear-gradient(90deg, transparent, rgba(255, 242, 198, 0.25), transparent);
  --gradient-card: linear-gradient(180deg, rgba(32, 28, 22, 0.8) 0%, rgba(18, 16, 13, 0.85) 100%);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  --shadow-gold-sm: 0 4px 16px rgba(230, 190, 104, 0.15);
  --shadow-gold-md: 0 8px 32px rgba(230, 190, 104, 0.22);
  --shadow-gold-lg: 0 16px 48px rgba(230, 190, 104, 0.3);

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(230, 190, 104, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 85% 60%, rgba(179, 136, 56, 0.08), transparent),
    radial-gradient(ellipse 50% 50% at 15% 40%, rgba(245, 215, 127, 0.06), transparent);
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Ambient glow accents */
.bg-glow-top {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(circle, rgba(230, 190, 104, 0.18) 0%, rgba(20, 18, 14, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Section Common */
.section {
  padding: 96px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: var(--champagne-subtle);
  border: 1px solid var(--champagne-border);
  color: var(--champagne-gold);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-title .text-gold {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

/* NAVIGATION */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(12, 11, 9, 0.8);
  border-bottom: 1px solid var(--champagne-subtle);
  transition: all var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.logo-btn:hover {
  transform: scale(1.04);
}

.logo-btn:active .logo-icon {
  transform: rotate(360deg) scale(0.92);
}

.logo-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-gold);
  border-radius: 12px;
  box-shadow: 0 4px 16px var(--champagne-glow);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  color: #1a150c;
}

.logo-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.logo-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

.logo-badge {
  font-size: 0.68rem;
  color: var(--champagne-gold);
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--champagne-gold);
  background: var(--champagne-subtle);
}

.nav-hamburger {
  display: none;
  background: none;
  border: 1px solid var(--champagne-border);
  color: var(--champagne-gold);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.nav-hamburger:hover {
  background: var(--champagne-subtle);
  border-color: var(--champagne-gold);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  background: var(--gradient-gold);
  color: #17130b !important;
  font-weight: 700;
  font-size: 0.92rem;
  text-decoration: none;
  box-shadow: var(--shadow-gold-sm);
  transition: all var(--transition-fast);
}

.nav-cta:hover {
  background: var(--gradient-gold-hover);
  box-shadow: var(--shadow-gold-md);
  transform: translateY(-2px);
}

/* HERO SECTION (左右两栏双布局) */
.hero-section {
  padding-top: 155px;
  padding-bottom: 90px;
  position: relative;
}

.hero-grid-2col {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 46px;
  align-items: center;
  text-align: left;
  margin-bottom: 50px;
}

.hero-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: rgba(230, 190, 104, 0.1);
  border: 1px solid var(--champagne-border-bright);
  color: var(--champagne-light);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 22px;
  backdrop-filter: blur(8px);
  animation: pulse-glow 3s infinite alternate;
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 12px rgba(230, 190, 104, 0.15); }
  100% { box-shadow: 0 0 24px rgba(230, 190, 104, 0.4); }
}

.hero-title {
  font-size: 3.35rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -1.2px;
  margin-bottom: 20px;
}

.brand-spotlight {
  display: inline-block;
  background: linear-gradient(135deg, #ffffff 0%, #fff0b8 35%, #e6be68 75%, #cca03c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  text-shadow: 0 0 30px rgba(230, 190, 104, 0.35);
}

.hero-title .shimmer-text {
  background: linear-gradient(135deg, #ffffff 0%, #fff2c6 25%, #e6be68 60%, #b38838 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 0 32px 0;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-trust-tags {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.trust-tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--champagne-gold);
  font-weight: 500;
}

/* HERO RIGHT: DYNAMIC CARDS & LIVE STATUS HUB */
.hero-dynamic-hub {
  position: relative;
  width: 100%;
}

.hero-status-dashboard {
  background: linear-gradient(180deg, rgba(30, 26, 20, 0.85) 0%, rgba(16, 14, 11, 0.95) 100%);
  border: 1px solid var(--champagne-border-bright);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), 0 0 35px rgba(230, 190, 104, 0.15);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(230, 190, 104, 0.15);
}

.radar-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.live-beacon {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #a3e635;
  box-shadow: 0 0 0 0 rgba(163, 230, 53, 0.7);
  animation: beacon-pulse 2s infinite;
}

@keyframes beacon-pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(163, 230, 53, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(163, 230, 53, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(163, 230, 53, 0); }
}

.dashboard-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.dashboard-badge {
  font-size: 0.74rem;
  color: var(--champagne-gold);
  background: var(--champagne-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--champagne-border);
  font-weight: 600;
}

/* LIVE NODES LIST */
.dashboard-nodes {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(22, 19, 15, 0.8);
  border: 1px solid rgba(230, 190, 104, 0.12);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.node-item:hover {
  background: rgba(38, 33, 26, 0.9);
  border-color: var(--champagne-gold);
  transform: translateX(4px);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-flag {
  font-size: 1.15rem;
  line-height: 1;
}

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

.node-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.node-type {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.node-stats {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-ping {
  font-size: 0.82rem;
  font-weight: 800;
  color: #a3e635;
  background: rgba(163, 230, 53, 0.1);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(163, 230, 53, 0.25);
}

/* SPEED WAVE & GAUGE */
.dashboard-throughput {
  background: rgba(18, 16, 13, 0.7);
  border: 1px solid rgba(230, 190, 104, 0.15);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.throughput-val {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

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

.throughput-wave {
  width: 110px;
  height: 32px;
}

/* FLOATING CHIPS */
.floating-feature-pill {
  position: absolute;
  background: rgba(26, 22, 17, 0.95);
  border: 1px solid var(--champagne-border-bright);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--champagne-light);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), var(--shadow-gold-sm);
  backdrop-filter: blur(12px);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pill-top-right {
  top: -16px;
  right: -12px;
  animation: float-slow 4s ease-in-out infinite alternate;
}

.pill-bottom-left {
  bottom: -18px;
  left: -12px;
  animation: float-reverse 4.5s ease-in-out infinite alternate;
}

@keyframes float-slow {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

@keyframes float-reverse {
  0% { transform: translateY(0); }
  100% { transform: translateY(8px); }
}


.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 38px;
  border-radius: var(--radius-pill);
  background: var(--gradient-gold);
  color: #151108;
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
  box-shadow: var(--shadow-gold-md);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: var(--gradient-shimmer);
  transform: skewX(-20deg);
  transition: none;
  animation: shimmer-btn 4s infinite;
}

@keyframes shimmer-btn {
  0% { left: -100%; }
  25% { left: 200%; }
  100% { left: 200%; }
}

.btn-primary:hover {
  background: var(--gradient-gold-hover);
  box-shadow: var(--shadow-gold-lg);
  transform: translateY(-3px) scale(1.02);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 34px;
  border-radius: var(--radius-pill);
  background: rgba(30, 26, 20, 0.85);
  border: 1px solid var(--champagne-border);
  color: var(--champagne-gold);
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(45, 38, 29, 0.95);
  border-color: var(--champagne-gold);
  color: var(--champagne-light);
  transform: translateY(-2px);
}

.btn-recommend {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 34px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, rgba(230, 190, 104, 0.22) 0%, rgba(35, 29, 21, 0.95) 100%);
  border: 1.5px solid var(--champagne-gold);
  color: var(--champagne-light);
  font-size: 1.05rem;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(230, 190, 104, 0.22);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.btn-recommend svg {
  color: var(--champagne-gold);
  transition: transform var(--transition-fast);
}

.btn-recommend:hover {
  background: linear-gradient(135deg, rgba(245, 215, 127, 0.35) 0%, rgba(55, 46, 34, 0.98) 100%);
  border-color: #ffffff;
  color: #ffffff;
  box-shadow: 0 8px 30px rgba(230, 190, 104, 0.45);
  transform: translateY(-3px) scale(1.02);
}

.btn-recommend:hover svg {
  transform: scale(1.2) rotate(15deg);
  color: #fff2c6;
}


/* Hero Metrics Strip */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.metric-item {
  text-align: center;
  border-right: 1px solid rgba(230, 190, 104, 0.15);
}

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

.metric-val {
  font-size: 2.1rem;
  font-weight: 800;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: 4px;
}

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

/* SECTION 1: CORE ADVANTAGES (3 Cards) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--gradient-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(230, 190, 104, 0.12), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--champagne-border-bright);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), var(--shadow-gold-sm);
}

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

.feature-icon-wrapper {
  width: 68px;
  height: 68px;
  border-radius: 18px;
  background: var(--champagne-subtle);
  border: 1px solid var(--champagne-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  color: var(--champagne-gold);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast);
}

.feature-card:hover .feature-icon-wrapper {
  background: var(--gradient-gold);
  color: #19140a;
  transform: scale(1.08) rotate(4deg);
  box-shadow: var(--shadow-gold-md);
}

.feature-tag {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--champagne-gold);
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}

.feature-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.3;
}

.feature-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-list {
  list-style: none;
  border-top: 1px solid rgba(230, 190, 104, 0.12);
  padding-top: 18px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.feature-list li svg {
  color: var(--champagne-gold);
  flex-shrink: 0;
}

/* SECTION 2: STREAMING & AI SUPPORT */
.ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.eco-card {
  background: var(--gradient-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-xl);
  padding: 44px 38px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
  transition: all var(--transition-normal);
}

.eco-card:hover {
  border-color: var(--champagne-border-bright);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5), var(--shadow-gold-sm);
  transform: translateY(-4px);
}

.eco-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(230, 190, 104, 0.15);
  border: 1px solid var(--champagne-border);
  color: var(--champagne-light);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.eco-title {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.3;
}

.eco-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  line-height: 1.65;
}

.eco-tags-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 30px;
}

.eco-item-tag {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(18, 16, 13, 0.8);
  border: 1px solid rgba(230, 190, 104, 0.18);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.eco-item-tag:hover {
  background: rgba(35, 30, 24, 0.9);
  border-color: var(--champagne-gold);
  transform: translateX(4px);
}

.eco-item-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--champagne-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--champagne-gold);
  flex-shrink: 0;
}

.eco-item-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.eco-item-status {
  font-size: 0.74rem;
  color: #a3e635;
  font-weight: 500;
}

.eco-banner-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid rgba(230, 190, 104, 0.15);
}

.eco-speed-pill {
  font-size: 0.85rem;
  color: var(--champagne-gold);
  font-weight: 600;
}

/* SECTION 3: PRICING PLANS */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--gradient-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-xl);
  padding: 44px 34px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(14px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--champagne-border-bright);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.6), var(--shadow-gold-sm);
}

.pricing-card.featured {
  border: 2px solid var(--champagne-gold);
  background: linear-gradient(180deg, rgba(46, 38, 27, 0.85) 0%, rgba(20, 18, 14, 0.95) 100%);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), var(--shadow-gold-md);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 26px 56px rgba(0, 0, 0, 0.6), var(--shadow-gold-lg);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-gold);
  color: #17130b;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 5px 18px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-gold-sm);
  letter-spacing: 0.8px;
}

.pricing-header {
  margin-bottom: 26px;
  text-align: left;
}

.plan-name {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

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

.price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(230, 190, 104, 0.15);
}

.price-symbol {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--champagne-gold);
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--champagne-light);
  line-height: 1;
}

.price-period {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.plan-features li svg {
  color: var(--champagne-gold);
  flex-shrink: 0;
}

.plan-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 15px;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 800;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.plan-btn-featured {
  background: var(--gradient-gold);
  color: #17130b;
  box-shadow: var(--shadow-gold-sm);
}

.plan-btn-featured:hover {
  background: var(--gradient-gold-hover);
  box-shadow: var(--shadow-gold-md);
  transform: translateY(-2px);
}

.plan-btn-outline {
  background: rgba(30, 26, 20, 0.85);
  border: 1px solid var(--champagne-border);
  color: var(--champagne-gold);
}

.plan-btn-outline:hover {
  background: var(--champagne-subtle);
  border-color: var(--champagne-gold);
  color: var(--champagne-light);
  transform: translateY(-2px);
}

/* SECTION: SEO ARTICLES CARDS (图卡展示) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card-item {
  background: var(--gradient-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.article-card-item:hover {
  transform: translateY(-6px);
  border-color: var(--champagne-border-bright);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.55), var(--shadow-gold-sm);
}

.article-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-badge {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--champagne-gold);
  background: var(--champagne-subtle);
  border: 1px solid var(--champagne-border);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

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

.article-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

.article-card-item:hover .article-card-title {
  color: var(--champagne-gold);
}

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(230, 190, 104, 0.12);
  font-size: 0.84rem;
  color: var(--champagne-gold);
  font-weight: 700;
}

.article-card-footer span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* SECTION 4: TESTIMONIALS (用户评价) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.review-card:hover {
  transform: translateY(-6px);
  border-color: var(--champagne-border-bright);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
}

.review-stars {
  color: #f5d77f;
  margin-bottom: 16px;
  display: flex;
  gap: 3px;
}

.review-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--champagne-subtle);
  border: 1px solid var(--champagne-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--champagne-gold);
  font-size: 1.1rem;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

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

/* SECTION 5: FAQ */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item.active {
  border-color: var(--champagne-border-bright);
  background: rgba(30, 26, 20, 0.9);
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  background: none;
  border: none;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--champagne-gold);
}

.faq-toggle-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--champagne-gold);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  padding: 0 28px;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 28px 24px 28px;
  transition: max-height 0.4s ease-in-out, padding 0.3s ease;
}

/* BOTTOM FINAL CTA BANNER */
.final-cta-section {
  padding: 60px 0 100px;
}

.final-cta-box {
  background: linear-gradient(135deg, rgba(38, 32, 23, 0.9) 0%, rgba(18, 15, 12, 0.95) 100%);
  border: 1px solid var(--champagne-border-bright);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), var(--shadow-gold-md);
}

.final-cta-box::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(230, 190, 104, 0.08), transparent 60%);
  pointer-events: none;
}

.final-cta-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--champagne-light);
}

.final-cta-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 36px auto;
}

/* FOOTER (严格保留要求的4个标题) */
.footer {
  border-top: 1px solid var(--champagne-subtle);
  background: #080706;
  padding: 48px 0 36px;
  position: relative;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: var(--champagne-gold);
  transform: translateY(-2px);
  background: var(--champagne-subtle);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-seo-badges {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 24px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(230, 190, 104, 0.1);
}

.seo-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: rgba(22, 19, 15, 0.6);
  border: 1px solid rgba(230, 190, 104, 0.15);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
}

.seo-badge-item svg {
  color: var(--champagne-gold);
}

.footer-seo-meta {
  text-align: center;
  max-width: 900px;
  margin: 0 auto 16px auto;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.footer-seo-meta strong {
  color: var(--champagne-light);
}

.footer-disclaimer {
  text-align: center;
  font-size: 0.72rem;
  color: #615749;
  line-height: 1.6;
  max-width: 820px;
  margin: 0 auto 14px auto;
}

/* PBN FRIENDSHIP MATRIX LINKS */
.footer-pbn-links {
  text-align: center;
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.pbn-label {
  color: var(--text-muted);
  font-weight: 600;
}

.pbn-link {
  color: var(--champagne-gold);
  text-decoration: none;
  font-weight: 700;
  transition: all var(--transition-fast);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.pbn-link:hover {
  color: var(--champagne-light);
  text-shadow: 0 0 10px rgba(245, 215, 127, 0.6);
  background: var(--champagne-subtle);
  transform: translateY(-1px);
}

.pbn-separator {
  color: rgba(230, 190, 104, 0.25);
  user-select: none;
}

/* FLOATING SECTION NAVIGATION ARROWS (右侧上下章节滚动浮标) */
.floating-section-nav {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 999;
}

.nav-arrow-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(22, 19, 15, 0.85);
  border: 1px solid var(--champagne-border);
  color: var(--champagne-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
  outline: none;
}

.nav-arrow-btn:hover {
  background: var(--gradient-gold);
  color: #17130b;
  border-color: var(--champagne-light);
  transform: scale(1.12);
  box-shadow: var(--shadow-gold-md);
}

.nav-arrow-btn:active {
  transform: scale(0.95);
}

.nav-arrow-btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
  border-color: rgba(230, 190, 104, 0.1);
}

/* SECTION PROGRESS INDICATOR */
.section-indicator {
  text-align: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--champagne-gold);
  letter-spacing: 1px;
  padding: 4px 0;
  user-select: none;
}

/* SECONDARY SUB-PAGES STYLING (关于我们、服务条款、隐私政策、网站地图) */
.subpage-hero {
  padding-top: 150px;
  padding-bottom: 40px;
  text-align: center;
}

.subpage-content {
  background: var(--gradient-card);
  border: 1px solid var(--champagne-border);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  margin-bottom: 70px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(16px);
}

.subpage-content h2 {
  font-size: 1.8rem;
  color: var(--champagne-gold);
  margin-top: 36px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(230, 190, 104, 0.15);
}

.subpage-content h2:first-of-type {
  margin-top: 0;
}

.subpage-content p {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.subpage-content ul {
  list-style: none;
  margin-bottom: 28px;
}

.subpage-content ul li {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  padding-left: 24px;
  position: relative;
  line-height: 1.7;
}

.subpage-content ul li::before {
  content: "✦";
  position: absolute;
  left: 0;
  color: var(--champagne-gold);
  font-size: 0.9rem;
}

.back-home-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--champagne-gold);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.back-link:hover {
  transform: translateX(-4px);
  color: var(--champagne-light);
}

/* RESPONSIVE DESIGN (@media) */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  .features-grid, .pricing-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
.eco-item-icon.netflix {
  background: rgba(229, 9, 20, 0.15);
  border: 1px solid rgba(229, 9, 20, 0.4);
  color: #ff3844;
}

.eco-item-icon.disney {
  background: rgba(17, 60, 207, 0.18);
  border: 1px solid rgba(17, 60, 207, 0.45);
  color: #4880ff;
}

.eco-item-icon.youtube {
  background: rgba(255, 0, 0, 0.15);
  border: 1px solid rgba(255, 0, 0, 0.4);
  color: #ff3333;
}

.eco-item-icon.spotify {
  background: rgba(29, 185, 84, 0.15);
  border: 1px solid rgba(29, 185, 84, 0.4);
  color: #1ed760;
}

.eco-item-icon.chatgpt {
  background: rgba(16, 163, 127, 0.18);
  border: 1px solid rgba(16, 163, 127, 0.45);
  color: #10a37f;
}

.eco-item-icon.claude {
  background: rgba(217, 119, 87, 0.18);
  border: 1px solid rgba(217, 119, 87, 0.45);
  color: #f28b66;
}

.eco-item-icon.midjourney {
  background: rgba(88, 101, 242, 0.18);
  border: 1px solid rgba(88, 101, 242, 0.45);
  color: #7983f5;
}

.eco-item-icon.gemini {
  background: linear-gradient(135deg, rgba(66, 133, 244, 0.2), rgba(155, 114, 203, 0.2));
  border: 1px solid rgba(155, 114, 203, 0.45);
  color: #a78bfa;
}

/* RESPONSIVE DESIGN (@media) */
@media (max-width: 1024px) {
  .hero-grid-2col {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-title {
    font-size: 2.85rem;
  }
  .features-grid, .pricing-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
  .hero-section {
    padding-top: 110px;
    padding-bottom: 50px;
  }
  .hero-grid-2col {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 36px;
  }
  .hero-title {
    font-size: 2.15rem;
  }
  .hero-sub {
    font-size: 1.02rem;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .metric-item:nth-child(2) {
    border-right: none;
  }
  .metric-item {
    padding: 10px 0;
  }
  .features-grid, .pricing-grid, .reviews-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  .eco-tags-grid {
    grid-template-columns: 1fr;
  }
  .floating-section-nav {
    right: 12px;
    gap: 8px;
  }
  .nav-arrow-btn {
    width: 40px;
    height: 40px;
  }
  .subpage-content {
    padding: 32px 20px;
  }
  .footer-nav {
    gap: 18px;
    flex-direction: column;
  }
  .nav-hamburger {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(14, 12, 10, 0.98);
    border-bottom: 1px solid var(--champagne-border);
    flex-direction: column;
    padding: 20px;
    gap: 10px;
    backdrop-filter: blur(20px);
    box-shadow: 0 16px 36px rgba(0,0,0,0.7);
  }
  .nav-links.open {
    display: flex;
  }
}