/* ==========================================================================
   CloudFox - Nocturnal Orbital-Astrolabe Bento UI Stylesheet
   Pure Native CSS | No Heavy External Libraries
   Visual DNA: Pitch Void-Black Micro-Grid (#060709), Metallic Silver-Grey,
   Vivid Emerald-Green (#22c55e), Celestial Orbit Blue (#3b82f6)
   ========================================================================== */

:root {
  /* Default: Night / Dark Mode (Nocturnal Cyber-Obsidian Masterpiece) */
  --bg-primary: #060709;
  --bg-secondary: #090b0f;
  --bg-surface: #0e1013;
  --bg-card: #0e1013;
  --bg-card-hover: #14171d;
  --bg-nav: rgba(6, 7, 9, 0.88);
  --bg-glass: rgba(14, 16, 19, 0.75);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --text-inverse: #060709;

  /* Typography Metallic Silver-Grey Gradient */
  --text-metallic: linear-gradient(180deg, #ffffff 0%, #e2e8f0 40%, #94a3b8 100%);
  --text-glow-emerald: 0 0 30px rgba(34, 197, 94, 0.4);

  --border-light: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(34, 197, 94, 0.5);
  --border-card: rgba(255, 255, 255, 0.07);

  /* Primary Accent: Vivid Emerald Green */
  --emerald-primary: #22c55e;
  --emerald-hover: #16a34a;
  --emerald-glow: rgba(34, 197, 94, 0.35);
  --emerald-glow-strong: 0 0 30px rgba(34, 197, 94, 0.45);

  /* Celestial Orbit Blue */
  --orbit-blue: #3b82f6;
  --orbit-blue-glow: rgba(59, 130, 246, 0.3);

  --brand-primary: #22c55e;
  --brand-gradient: linear-gradient(135deg, #22c55e 0%, #3b82f6 100%);
  --brand-gradient-hover: linear-gradient(135deg, #16a34a 0%, #2563eb 100%);

  --card-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.8);
  --card-shadow-hover: 0 30px 60px -20px rgba(0, 0, 0, 0.95);
  --bento-radius: 24px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-theme: background 0.4s ease, background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

/* Light Mode Overrides (Refined Architectural Clean Titanium) */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-nav: rgba(248, 250, 252, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.8);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --text-metallic: linear-gradient(180deg, #0f172a 0%, #1e293b 60%, #475569 100%);
  --text-glow-emerald: 0 0 20px rgba(16, 185, 129, 0.2);

  --border-light: rgba(226, 232, 240, 0.85);
  --border-focus: rgba(16, 185, 129, 0.45);
  --border-card: rgba(226, 232, 240, 0.9);

  --emerald-primary: #10b981;
  --emerald-hover: #059669;
  --emerald-glow: rgba(16, 185, 129, 0.25);
  --emerald-glow-strong: 0 8px 25px rgba(16, 185, 129, 0.3);

  --orbit-blue: #2563eb;
  --orbit-blue-glow: rgba(37, 99, 235, 0.2);

  --brand-primary: #10b981;
  --brand-gradient: linear-gradient(135deg, #10b981 0%, #2563eb 100%);
  --brand-gradient-hover: linear-gradient(135deg, #059669 0%, #1d4ed8 100%);

  --card-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --card-shadow-hover: 0 20px 40px -15px rgba(15, 23, 42, 0.12);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  transition: var(--transition-theme);
  overflow-x: hidden;
  position: relative;
}

/* Void-Black Micro-Grid Background Canvas */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at 50% 30%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black 40%, transparent 85%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="light"] body::before {
  background-image: 
    linear-gradient(to right, rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
}

/* Radial Glow Orbs */
.ambient-glow-orbit {
  position: absolute;
  top: 100px;
  right: 5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-emerald {
  position: absolute;
  top: 250px;
  left: -100px;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.09) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-theme);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo svg {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.brand-logo-img {
  height: 24px;
  width: auto;
  display: block;
}

.logo-dark {
  display: block !important;
}
.logo-light {
  display: none !important;
}

[data-theme="light"] .logo-dark {
  display: none !important;
}
[data-theme="light"] .logo-light {
  display: block !important;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 2px;
  transition: color var(--transition-fast);
}

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

[data-theme="light"] .nav-link:hover {
  color: var(--emerald-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--emerald-primary);
  box-shadow: 0 0 8px var(--emerald-primary);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

/* Special Pill for '推荐资讯' (Insights) in Header */
.nav-link-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--emerald-primary);
  font-weight: 600;
  font-size: 0.88rem;
  transition: all var(--transition-fast);
}

.nav-link-badge:hover {
  background: rgba(34, 197, 94, 0.2);
  border-color: var(--emerald-primary);
  box-shadow: 0 0 15px rgba(34, 197, 94, 0.3);
  transform: translateY(-1px);
}

.nav-link-badge::after {
  display: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Translucent Day/Night Switcher */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  background: var(--bg-surface);
  border-color: var(--border-focus);
  color: var(--emerald-primary);
  box-shadow: 0 0 15px var(--emerald-glow);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

.icon-moon {
  display: block;
}
.icon-sun {
  display: none;
}

[data-theme="light"] .icon-moon {
  display: none;
}
[data-theme="light"] .icon-sun {
  display: block;
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
}

.mobile-menu-btn svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 2;
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 11px 24px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

/* Glowing Emerald Primary Button */
.btn-emerald {
  background: var(--emerald-primary);
  color: #060709 !important;
  box-shadow: var(--emerald-glow-strong);
  border: 1px solid rgba(255, 255, 255, 0.25);
  font-weight: 800;
}

.btn-emerald:hover {
  background: #4ade80;
  box-shadow: 0 0 35px rgba(34, 197, 94, 0.65);
  transform: translateY(-2px);
}

.btn-emerald:active {
  transform: translateY(0);
}

/* Dark-Bordered Pill Button ("匿名购买") */
.btn-dark-pill {
  background: rgba(14, 16, 19, 0.8);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
}

.btn-dark-pill:hover {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(25, 28, 35, 0.9);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .btn-dark-pill {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.15);
  color: var(--text-primary);
}

[data-theme="light"] .btn-dark-pill:hover {
  border-color: var(--emerald-primary);
  color: var(--emerald-primary);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Hero Section (Nocturnal Orbital-Astrolabe Bento Layout)
   ========================================================================== */
.hero-orbital-section {
  padding: 70px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-main-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 50px;
}

/* Upper-Left Command Area */
.hero-command {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14, 16, 19, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--emerald-primary);
  width: fit-content;
  backdrop-filter: blur(10px);
}

.status-dot-radar {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald-primary);
  box-shadow: 0 0 10px var(--emerald-primary);
  animation: pulse-emerald 2s infinite ease-in-out;
}

@keyframes pulse-emerald {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Monumental Silver-Grey Bold Typography */
.hero-monumental-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.035em;
  background: var(--text-metallic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subheadline-bold {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #f1f5f9;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

[data-theme="light"] .hero-subheadline-bold {
  color: #0f172a;
}

.hero-subheadline-bold .highlight-emerald {
  color: var(--emerald-primary);
  text-shadow: 0 0 20px rgba(34, 197, 94, 0.4);
}

.hero-intro-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 10px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Upper-Right 3D Concentric Orbital Radar Astrolabe
   ========================================================================== */
.orbital-radar-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin: 0 auto;
  perspective: 1000px;
}

.orbital-radar-canvas {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.15s cubic-bezier(0.1, 0.9, 0.2, 1);
}

/* Concentric Dashed Orbital Rings */
.orbit-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.orbit-ring-1 {
  width: 90%;
  height: 90%;
  border: 1px dashed rgba(59, 130, 246, 0.25);
  animation: rotate-orbit 45s linear infinite;
}

.orbit-ring-2 {
  width: 70%;
  height: 70%;
  border: 1px dashed rgba(34, 197, 94, 0.3);
  animation: rotate-orbit-reverse 32s linear infinite;
}

.orbit-ring-3 {
  width: 48%;
  height: 48%;
  border: 1px solid rgba(59, 130, 246, 0.4);
  box-shadow: 0 0 25px rgba(59, 130, 246, 0.15);
}

.orbit-core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80px;
  height: 80px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, #0e1013 40%, rgba(59, 130, 246, 0.25) 100%);
  border: 1px solid rgba(59, 130, 246, 0.5);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.orbit-core-icon {
  width: 32px;
  height: 32px;
  color: var(--emerald-primary);
  filter: drop-shadow(0 0 8px var(--emerald-primary));
}

.orbit-core-text {
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-top: 2px;
}

/* Luminous Celestial Satellite Nodes */
.orbit-satellite {
  position: absolute;
  border-radius: 50%;
  background: var(--orbit-blue);
  box-shadow: 0 0 15px var(--orbit-blue), 0 0 25px rgba(59, 130, 246, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.satellite-label {
  position: absolute;
  left: 18px;
  white-space: nowrap;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #cbd5e1;
  background: rgba(6, 7, 9, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
  backdrop-filter: blur(8px);
  pointer-events: none;
}

.sat-node-1 {
  width: 12px;
  height: 12px;
  top: 15%;
  right: 22%;
  background: #60a5fa;
}

.sat-node-2 {
  width: 10px;
  height: 10px;
  bottom: 24%;
  left: 12%;
  background: var(--emerald-primary);
  box-shadow: 0 0 15px var(--emerald-primary);
}

.sat-node-3 {
  width: 14px;
  height: 14px;
  bottom: 18%;
  right: 18%;
  background: #38bdf8;
}

.sat-node-4 {
  width: 9px;
  height: 9px;
  top: 28%;
  left: 18%;
  background: #818cf8;
}

/* Radar Sweep Line */
.radar-sweep-beam {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 45%;
  height: 2px;
  background: linear-gradient(90deg, rgba(34, 197, 94, 0.8) 0%, transparent 100%);
  transform-origin: 0% 50%;
  animation: radar-sweep 6s linear infinite;
  pointer-events: none;
}

@keyframes rotate-orbit {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes rotate-orbit-reverse {
  from { transform: translate(-50%, -50%) rotate(360deg); }
  to { transform: translate(-50%, -50%) rotate(0deg); }
}

@keyframes radar-sweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Hero Bottom Two-Column Bento Grid
   ========================================================================== */
.hero-bento-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 10px;
}

/* Bento Card Style with Specular Perimeter Sweep */
.bento-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--bento-radius);
  padding: 34px 32px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
}

/* Specular 1px Edge-Scan Light Sweep on Hover */
.bento-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: transparent;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.bento-card:hover::before {
  opacity: 1;
  background: linear-gradient(135deg, transparent 20%, var(--emerald-primary) 50%, transparent 80%);
}

.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(34, 197, 94, 0.35);
}

.bento-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.bento-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.bento-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 22px;
}

/* Pill Badges Grid */
.pill-badges-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.dark-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

[data-theme="light"] .dark-pill-badge {
  background: #f1f5f9;
  border-color: rgba(0, 0, 0, 0.08);
  color: #334155;
}

.dark-pill-badge:hover {
  border-color: var(--emerald-primary);
  color: #ffffff;
  background: rgba(34, 197, 94, 0.15);
  box-shadow: 0 0 15px rgba(34, 197, 94, 0.25);
  transform: translateY(-2px);
}

[data-theme="light"] .dark-pill-badge:hover {
  color: var(--emerald-primary);
  background: rgba(16, 185, 129, 0.1);
}

.dark-pill-badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Right Bento Card: 35ms Telemetry Readout */
.telemetry-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.telemetry-tag {
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--orbit-blue);
  display: flex;
  align-items: center;
  gap: 8px;
}

.telemetry-readout {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.telemetry-number {
  font-size: 4.4rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--emerald-primary);
  text-shadow: 0 0 30px rgba(34, 197, 94, 0.4);
}

.telemetry-unit {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-muted);
}

.telemetry-stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.telemetry-stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-val {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
}

.stat-key {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-secondary);
  transition: var(--transition-theme);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--emerald-primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  background: var(--text-metallic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Core Advantages: 3 Bento Cards
   ========================================================================== */
.advantages-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.adv-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--bento-radius);
  padding: 38px 30px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.adv-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(34, 197, 94, 0.4);
}

.adv-icon-box {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--emerald-primary);
  margin-bottom: 24px;
}

.adv-icon-box svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  stroke-width: 2.2;
}

.adv-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.adv-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.adv-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.adv-chip {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
}

/* ==========================================================================
   Showcase: Streaming Media & AI Support Bento Cards
   ========================================================================== */
.showcase-bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.showcase-bento-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--bento-radius);
  padding: 40px;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.showcase-bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(59, 130, 246, 0.4);
}

.showcase-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #60a5fa;
  margin-bottom: 16px;
  width: fit-content;
}

.showcase-badge-pill.emerald {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--emerald-primary);
}

.showcase-card-title {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin-bottom: 12px;
}

.showcase-card-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 26px;
}

.showcase-app-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.app-pill-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  font-size: 0.88rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.app-pill-box:hover {
  border-color: var(--emerald-primary);
  background: rgba(34, 197, 94, 0.08);
  transform: translateY(-2px);
}

.app-pill-box svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.showcase-footer-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  font-size: 0.85rem;
  margin-top: auto;
}

.status-active-group {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--emerald-primary);
  font-weight: 700;
}

/* ==========================================================================
   Pricing Section (Real Market Realistic Pricing Table)
   ========================================================================== */
.pricing-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--bento-radius);
  padding: 42px 32px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
}

.price-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
}

.price-card.featured-popular {
  border: 2px solid var(--emerald-primary);
  background: linear-gradient(180deg, rgba(34, 197, 94, 0.05) 0%, var(--bg-surface) 100%);
  box-shadow: 0 20px 45px -10px rgba(34, 197, 94, 0.25);
  transform: scale(1.02);
}

.price-card.featured-popular:hover {
  transform: scale(1.04) translateY(-4px);
}

.featured-emerald-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--emerald-primary);
  color: #060709;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.5);
  white-space: nowrap;
}

.plan-head-wrap {
  margin-bottom: 22px;
}

.plan-title-text {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.plan-summary-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.plan-cost-display {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.plan-currency {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--emerald-primary);
}

.plan-amount-massive {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
}

.plan-period-unit {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 600;
}

.plan-per-month {
  font-size: 0.8rem;
  color: var(--emerald-primary);
  font-weight: 600;
  margin-left: 4px;
}

.plan-feature-checklist {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.feat-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.feat-item svg {
  width: 18px;
  height: 18px;
  stroke: var(--emerald-primary);
  stroke-width: 2.5;
  flex-shrink: 0;
}

.feat-item.disabled {
  color: var(--text-muted);
  text-decoration: line-through;
  opacity: 0.5;
}

.feat-item.disabled svg {
  stroke: var(--text-muted);
}

/* ==========================================================================
   User Testimonials (用户评价)
   ========================================================================== */
.testimonials-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-bento-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--bento-radius);
  padding: 32px 28px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.testimonial-bento-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 197, 94, 0.35);
  box-shadow: var(--card-shadow-hover);
}

.stars-row {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: #fbbf24;
}

.stars-row svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.testimonial-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.testimonial-user-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.user-avatar-circle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--emerald-primary);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
}

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

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

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

/* ==========================================================================
   FAQ Section (常见问题)
   ========================================================================== */
.faq-accordion-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-bento-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-bento-item:hover {
  border-color: rgba(34, 197, 94, 0.3);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--transition-fast);
}

.faq-question-btn:hover {
  color: var(--emerald-primary);
}

.faq-chevron {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2.2;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-bento-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--emerald-primary);
}

.faq-answer-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-bento-item.active .faq-answer-drawer {
  padding-bottom: 24px;
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */
.cta-astrolabe-banner {
  margin: 70px 0 50px;
}

.cta-bento-box {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.12) 0%, rgba(59, 130, 246, 0.15) 100%), var(--bg-surface);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--bento-radius);
  padding: 65px 40px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8), 0 0 40px rgba(34, 197, 94, 0.15);
}

.cta-huge-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.025em;
  background: var(--text-metallic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cta-sub-summary {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto 34px;
  line-height: 1.65;
}

/* ==========================================================================
   Footer (Strictly 4 Links as required)
   ========================================================================== */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  padding: 50px 0 40px;
  transition: var(--transition-theme);
}

.footer-inner-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.footer-four-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-nav-item {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-nav-item:hover {
  color: var(--emerald-primary);
  background: rgba(34, 197, 94, 0.08);
}

.footer-legal-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

.brand-bold-tag {
  font-weight: 800;
  color: var(--text-primary);
}

/* ==========================================================================
   Sub-pages & Article layout (Insights, About, Terms, Privacy, Sitemap)
   ========================================================================== */
.article-bento-wrapper {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--bento-radius);
  padding: 50px 48px;
  box-shadow: var(--card-shadow);
}

.article-bento-wrapper h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-top: 38px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
}

.article-bento-wrapper h2:first-of-type {
  margin-top: 0;
}

.article-bento-wrapper h3 {
  font-size: 1.22rem;
  font-weight: 700;
  margin-top: 26px;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.article-bento-wrapper p {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
}

.article-bento-wrapper ul {
  margin-bottom: 24px;
  padding-left: 22px;
  list-style: disc;
}

.article-bento-wrapper li {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 10px;
}

.bento-alert {
  background: rgba(34, 197, 94, 0.08);
  border-left: 4px solid var(--emerald-primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 26px 0;
  font-size: 0.96rem;
  color: var(--text-secondary);
}

.bento-alert.danger {
  border-left-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

/* Insights Articles Feed Layout */
.news-feed-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 24px;
}

.news-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.news-article-card:hover {
  transform: translateY(-4px);
  border-color: var(--emerald-primary);
  box-shadow: 0 15px 35px -10px rgba(34, 197, 94, 0.15);
}

.news-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.news-category-badge {
  background: rgba(34, 197, 94, 0.12);
  color: var(--emerald-primary);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.news-headline {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.35;
}

.news-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Responsive Adaptations (@media)
   Strict Single Column on Mobile, Touch-Friendly Tap Targets
   ========================================================================== */
@media (max-width: 992px) {
  .hero-main-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .orbital-radar-viewport {
    max-width: 380px;
  }

  .hero-bento-grid,
  .advantages-bento-grid,
  .showcase-bento-grid,
  .pricing-bento-grid,
  .testimonials-bento-grid {
    grid-template-columns: 1fr;
  }

  .price-card.featured-popular {
    transform: none;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .nav-wrap {
    height: 68px;
  }

  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
    z-index: 999;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    font-size: 1.05rem;
    width: 100%;
    padding: 10px 0;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .hero-monumental-title {
    font-size: 2.5rem;
  }

  .hero-subheadline-bold {
    font-size: 1.2rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
  }

  .showcase-app-matrix {
    grid-template-columns: repeat(2, 1fr);
  }

  .telemetry-number {
    font-size: 3.5rem;
  }

  .telemetry-stats-bar {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .footer-four-nav {
    flex-direction: column;
    gap: 16px;
  }

  .footer-nav-item {
    font-size: 1.05rem;
    width: 100%;
    text-align: center;
    padding: 8px 16px;
  }

  .article-bento-wrapper {
    padding: 30px 20px;
  }
}

@media (max-width: 480px) {
  .showcase-app-matrix {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Long-Form SEO Article Styles (TOC, Breadcrumbs, Data Tables, Related)
   ========================================================================== */
.article-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.article-breadcrumbs a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.article-breadcrumbs .sep {
  opacity: 0.4;
}

/* Table of Contents (TOC) */
.article-toc {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--emerald-primary);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin: 30px 0 40px;
}

[data-theme="light"] .article-toc {
  background: #f8fafc;
  border-color: rgba(226, 232, 240, 0.9);
  border-left-color: var(--emerald-primary);
}

.toc-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.toc-list {
  list-style: none !important;
  padding-left: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 0 !important;
}

.toc-list li {
  margin-bottom: 0 !important;
}

.toc-list a {
  font-size: 0.93rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.toc-list a:hover {
  color: var(--emerald-primary);
  transform: translateX(4px);
}

/* Article Data Table */
.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.article-table th {
  background: rgba(255, 255, 255, 0.05);
  padding: 14px 18px;
  font-weight: 800;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}

[data-theme="light"] .article-table th {
  background: #f1f5f9;
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  line-height: 1.55;
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Internal Link Callout Card */
.internal-link-callout {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(59, 130, 246, 0.08) 100%);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 36px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.internal-link-text h4 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.internal-link-text p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Related Articles Grid */
.related-posts-section {
  margin-top: 55px;
  padding-top: 35px;
  border-top: 1px solid var(--border-light);
}

.related-posts-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 860px) {
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
}

.related-post-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all var(--transition-fast);
}

.related-post-card:hover {
  border-color: var(--emerald-primary);
  transform: translateY(-3px);
  background: rgba(34, 197, 94, 0.04);
}

.related-post-card h5 {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
}

.related-post-card .meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}