/* ==========================================================================
   Bitz Net (thebitz.mom) - Pure Vanilla Native CSS Design System
   High-Performance, Zero Heavy JS Frameworks, Instant Loading & Fully Responsive
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Color Palette */
  --bg-dark: #040814;
  --bg-card: rgba(13, 20, 36, 0.78);
  --bg-card-hover: rgba(20, 32, 56, 0.88);
  --bg-glass: rgba(8, 14, 28, 0.75);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.4);

  --cyan-primary: #00f2fe;
  --blue-primary: #38bdf8;
  --indigo-primary: #6366f1;
  --purple-primary: #818cf8;
  --emerald-accent: #10b981;
  --amber-accent: #f59e0b;
  --rose-accent: #f43f5e;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.25);
  --shadow-btn: 0 8px 24px -6px rgba(0, 242, 254, 0.45);

  --container-max: 1240px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Pure CSS Dynamic Ambient Background — 电影级超清翠竹 · 灵动夜影
   ========================================================================== */
.dynamic-background {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
  background-color: #010604;
}

/* 4K Ultra-HD Masterpiece Artwork Layer with Cinema Breathing Effect */
.bamboo-photo-layer {
  position: absolute;
  inset: -4%;
  width: 108%;
  height: 108%;
  background-image: url('assets/bamboo-bg.jpg');
  background-position: center 25%;
  background-size: cover;
  background-repeat: no-repeat;
  animation: bambooPhotoBreathe 32s ease-in-out infinite alternate;
  filter: brightness(0.9) contrast(1.1) saturate(1.15);
  will-change: transform;
}

@keyframes bambooPhotoBreathe {
  0% { transform: scale(1) translate3d(0, 0, 0); }
  50% { transform: scale(1.035) translate3d(-0.8%, -0.6%, 0); }
  100% { transform: scale(1.01) translate3d(0.6%, 0.4%, 0); }
}

/* Multi-Stop Atmospheric Shadow & Vignette Layer (Protects Text Legibility) */
.bamboo-vignette-layer {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 50% 32%, rgba(2, 10, 7, 0.42) 0%, rgba(2, 8, 6, 0.76) 65%, rgba(1, 5, 3, 0.94) 100%),
    linear-gradient(180deg, rgba(2, 10, 7, 0.8) 0%, rgba(2, 10, 7, 0.22) 28%, rgba(2, 10, 7, 0.38) 72%, rgba(1, 5, 3, 0.96) 100%);
  pointer-events: none;
}

/* Bioluminescent Glowing Spores / Fireflies (萤火浮光) */
.bamboo-spore {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform, opacity;
}

.spore-1 {
  width: 6px;
  height: 6px;
  left: 18%;
  top: 25%;
  background: radial-gradient(circle, #a7f3d0 0%, #34d399 50%, transparent 100%);
  box-shadow: 0 0 16px #6ee7b7, 0 0 28px rgba(110, 231, 183, 0.7);
  animation: sporeGlow1 7s ease-in-out infinite alternate;
}

.spore-2 {
  width: 8px;
  height: 8px;
  right: 22%;
  top: 40%;
  background: radial-gradient(circle, #6ee7b7 0%, #10b981 50%, transparent 100%);
  box-shadow: 0 0 18px #34d399, 0 0 32px rgba(52, 211, 153, 0.75);
  animation: sporeGlow2 9s ease-in-out infinite alternate;
}

.spore-3 {
  width: 5px;
  height: 5px;
  left: 35%;
  top: 65%;
  background: radial-gradient(circle, #a7f3d0 0%, #34d399 50%, transparent 100%);
  box-shadow: 0 0 14px #6ee7b7;
  animation: sporeGlow3 8s ease-in-out infinite alternate;
}

.spore-4 {
  width: 7px;
  height: 7px;
  right: 12%;
  top: 18%;
  background: radial-gradient(circle, #6ee7b7 0%, #10b981 50%, transparent 100%);
  box-shadow: 0 0 18px #34d399;
  animation: sporeGlow4 10s ease-in-out infinite alternate;
}

.spore-5 {
  width: 5px;
  height: 5px;
  left: 60%;
  top: 80%;
  background: radial-gradient(circle, #a7f3d0 0%, #34d399 50%, transparent 100%);
  box-shadow: 0 0 12px #34d399;
  animation: sporeGlow1 8.5s ease-in-out infinite alternate;
}

@keyframes sporeGlow1 {
  0% { transform: translate3d(0, 0, 0) scale(0.8); opacity: 0.35; }
  50% { transform: translate3d(25px, -35px, 0) scale(1.3); opacity: 0.95; }
  100% { transform: translate3d(-15px, -65px, 0) scale(0.9); opacity: 0.4; }
}

@keyframes sporeGlow2 {
  0% { transform: translate3d(0, 0, 0) scale(1.2); opacity: 0.4; }
  50% { transform: translate3d(-35px, -45px, 0) scale(0.8); opacity: 0.85; }
  100% { transform: translate3d(20px, -80px, 0) scale(1.1); opacity: 0.3; }
}

@keyframes sporeGlow3 {
  0% { transform: translate3d(0, 0, 0) scale(0.9); opacity: 0.25; }
  50% { transform: translate3d(30px, -20px, 0) scale(1.4); opacity: 0.9; }
  100% { transform: translate3d(10px, -50px, 0) scale(0.8); opacity: 0.3; }
}

@keyframes sporeGlow4 {
  0% { transform: translate3d(0, 0, 0) scale(1); opacity: 0.45; }
  50% { transform: translate3d(-20px, 30px, 0) scale(1.35); opacity: 0.95; }
  100% { transform: translate3d(-40px, -20px, 0) scale(0.75); opacity: 0.35; }
}

/* Subtle Emerald Mist / Moonlight Aura Orbs */
.bamboo-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  will-change: transform, opacity;
  pointer-events: none;
}

.bamboo-orb-1 {
  width: 580px;
  height: 580px;
  top: -100px;
  left: 5%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.28) 0%, rgba(5, 150, 105, 0.12) 60%, transparent 100%);
  animation: orbDrift1 24s ease-in-out infinite alternate;
}

.bamboo-orb-2 {
  width: 620px;
  height: 620px;
  top: 30%;
  right: -80px;
  background: radial-gradient(circle, rgba(52, 211, 153, 0.22) 0%, rgba(6, 78, 59, 0.15) 60%, transparent 100%);
  animation: orbDrift2 28s ease-in-out infinite alternate;
}

.bamboo-orb-3 {
  width: 500px;
  height: 500px;
  bottom: 5%;
  left: 25%;
  background: radial-gradient(circle, rgba(110, 231, 183, 0.18) 0%, rgba(4, 120, 87, 0.08) 60%, transparent 100%);
  animation: orbDrift3 26s ease-in-out infinite alternate;
}

/* SVG Bamboo Canvas */
.bamboo-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

/* Bamboo Culm Swaying Animations */
.bamboo-stalk-left-1 {
  transform-origin: 140px 1080px;
  animation: bambooSwayL1 9s ease-in-out infinite alternate;
}

.bamboo-stalk-left-2 {
  transform-origin: 65px 1080px;
  animation: bambooSwayL2 11.5s ease-in-out infinite alternate;
}

.bamboo-stalk-left-far {
  transform-origin: 220px 1080px;
  animation: bambooSwayFar 13s ease-in-out infinite alternate;
}

.bamboo-stalk-right-1 {
  transform-origin: 1780px 1080px;
  animation: bambooSwayR1 10s ease-in-out infinite alternate;
}

.bamboo-stalk-right-2 {
  transform-origin: 1855px 1080px;
  animation: bambooSwayR2 12s ease-in-out infinite alternate;
}

.bamboo-stalk-right-far {
  transform-origin: 1710px 1080px;
  animation: bambooSwayFarR 14s ease-in-out infinite alternate;
}

/* Top Overhanging Canopy Branches */
.bamboo-top-left {
  transform-origin: 0 0;
  animation: branchSwayTL 7.5s ease-in-out infinite alternate;
}

.bamboo-top-right {
  transform-origin: 1920px 0;
  animation: branchSwayTR 8.5s ease-in-out infinite alternate;
}

/* Branch & Leaf Rustling */
.bamboo-leaf-breeze {
  animation: leafBreeze 5.5s ease-in-out infinite alternate;
}

@keyframes bambooSwayL1 {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(1.4deg); }
  100% { transform: rotate(-0.9deg); }
}

@keyframes bambooSwayL2 {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(-1.6deg); }
  100% { transform: rotate(1.1deg); }
}

@keyframes bambooSwayFar {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(0.8deg); }
  100% { transform: rotate(-0.6deg); }
}

@keyframes bambooSwayR1 {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(-1.3deg); }
  100% { transform: rotate(1.0deg); }
}

@keyframes bambooSwayR2 {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(1.5deg); }
  100% { transform: rotate(-0.8deg); }
}

@keyframes bambooSwayFarR {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(-0.7deg); }
  100% { transform: rotate(0.6deg); }
}

@keyframes branchSwayTL {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(1.8deg) translateY(3px); }
  100% { transform: rotate(-1.2deg); }
}

@keyframes branchSwayTR {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(-1.9deg) translateY(4px); }
  100% { transform: rotate(1.1deg); }
}

@keyframes leafBreeze {
  0% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.025) rotate(2.2deg); }
  100% { transform: scale(0.985) rotate(-1.5deg); }
}

/* Drifting Bamboo Leaves Falling Particles */
.drifting-leaf {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  will-change: transform, opacity;
}

.leaf-1 {
  left: 8%;
  top: -5%;
  animation: leafFall1 13s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  animation-delay: 0s;
}

.leaf-2 {
  left: 28%;
  top: -5%;
  animation: leafFall2 16s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  animation-delay: 2.5s;
}

.leaf-3 {
  left: 52%;
  top: -5%;
  animation: leafFall3 14s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  animation-delay: 5s;
}

.leaf-4 {
  left: 72%;
  top: -5%;
  animation: leafFall4 17s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  animation-delay: 1.2s;
}

.leaf-5 {
  left: 88%;
  top: -5%;
  animation: leafFall5 15s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  animation-delay: 7s;
}

.leaf-6 {
  left: 40%;
  top: -5%;
  animation: leafFall6 18s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  animation-delay: 9s;
}

@keyframes leafFall1 {
  0% { transform: translate3d(0, 0, 0) rotate(0deg) scale(0.85); opacity: 0; }
  12% { opacity: 0.85; }
  85% { opacity: 0.85; }
  100% { transform: translate3d(360px, 1120px, 0) rotate(480deg) scale(1.05); opacity: 0; }
}

@keyframes leafFall2 {
  0% { transform: translate3d(0, 0, 0) rotate(40deg) scale(0.9); opacity: 0; }
  15% { opacity: 0.78; }
  85% { opacity: 0.78; }
  100% { transform: translate3d(-240px, 1140px, 0) rotate(-380deg) scale(0.95); opacity: 0; }
}

@keyframes leafFall3 {
  0% { transform: translate3d(0, 0, 0) rotate(10deg) scale(1); opacity: 0; }
  10% { opacity: 0.82; }
  88% { opacity: 0.82; }
  100% { transform: translate3d(420px, 1120px, 0) rotate(520deg) scale(1.15); opacity: 0; }
}

@keyframes leafFall4 {
  0% { transform: translate3d(0, 0, 0) rotate(-30deg) scale(0.8); opacity: 0; }
  14% { opacity: 0.75; }
  86% { opacity: 0.75; }
  100% { transform: translate3d(-300px, 1150px, 0) rotate(-460deg) scale(1); opacity: 0; }
}

@keyframes leafFall5 {
  0% { transform: translate3d(0, 0, 0) rotate(60deg) scale(0.95); opacity: 0; }
  12% { opacity: 0.8; }
  88% { opacity: 0.8; }
  100% { transform: translate3d(280px, 1120px, 0) rotate(390deg) scale(0.9); opacity: 0; }
}

@keyframes leafFall6 {
  0% { transform: translate3d(0, 0, 0) rotate(-15deg) scale(1.05); opacity: 0; }
  15% { opacity: 0.85; }
  85% { opacity: 0.85; }
  100% { transform: translate3d(-180px, 1140px, 0) rotate(-510deg) scale(0.85); opacity: 0; }
}

@keyframes orbDrift1 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(80px, 60px, 0) scale(1.15); }
  100% { transform: translate3d(-60px, 120px, 0) scale(0.95); }
}

@keyframes orbDrift2 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-100px, -80px, 0) scale(1.12); }
  100% { transform: translate3d(-40px, 90px, 0) scale(0.92); }
}

@keyframes orbDrift3 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(70px, -70px, 0) scale(1.1); }
  100% { transform: translate3d(120px, -30px, 0) scale(0.98); }
}

/* ==========================================================================
   Layout Containers & Common Utility Classes
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding-top: 88px;
  padding-bottom: 88px;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 54px;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: clamp(1rem, 1.8vw, 1.125rem);
  color: var(--text-muted);
  line-height: 1.7;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(0, 242, 254, 0.1);
  color: var(--cyan-primary);
  border: 1px solid rgba(0, 242, 254, 0.25);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.text-gradient {
  background: linear-gradient(135deg, #ffffff 0%, #a7f3d0 35%, #6ee7b7 70%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-purple {
  background: linear-gradient(135deg, var(--cyan-primary) 0%, var(--purple-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   Buttons (Mandatory CTA Requirements: rel="nofollow" target="_blank")
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border: 1px solid transparent;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, #a7f3d0 0%, #6ee7b7 45%, #10b981 100%);
  color: #022c22;
  box-shadow: 0 8px 24px -6px rgba(52, 211, 153, 0.45);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -4px rgba(52, 211, 153, 0.65);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--border-subtle);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255,255,255,0.3), transparent);
  transform: rotate(25deg) translate3d(-100%, 0, 0);
  transition: transform 0.6s ease;
}

.btn-glow:hover::after {
  transform: rotate(25deg) translate3d(100%, 0, 0);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Header & Navigation (Logo on Top-Left)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(4, 8, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

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

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

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

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

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

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

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding-top: 80px;
  padding-bottom: 80px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.4rem, 4.8vw, 3.8rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

.hero-desc {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 34px;
  max-width: 620px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.stat-item-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
}

.stat-item-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Hero Terminal / Live Dashboard Card */
.hero-dashboard-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  position: relative;
}

.hero-dashboard-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.4), transparent 60%, rgba(99, 102, 241, 0.3));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.card-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.card-dots {
  display: flex;
  gap: 7px;
}

.card-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.card-dot.red { background: #ef4444; }
.card-dot.yellow { background: #f59e0b; }
.card-dot.green { background: #10b981; }

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--emerald-accent);
}

.live-pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--emerald-accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--emerald-accent);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.35); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.speed-meter-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
}

.speed-number {
  font-size: 3rem;
  font-weight: 900;
  color: var(--cyan-primary);
  font-family: var(--font-mono);
  line-height: 1;
}

.speed-unit {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-left: 6px;
}

.speed-tag {
  font-size: 0.85rem;
  color: var(--emerald-accent);
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.progress-bar-wrap {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 22px;
}

.progress-bar-fill {
  height: 100%;
  width: 96%;
  background: linear-gradient(90deg, #00f2fe, #38bdf8, #818cf8);
  border-radius: var(--radius-full);
  animation: fillAnim 3s ease-out forwards;
}

@keyframes fillAnim {
  0% { width: 0%; }
  100% { width: 96%; }
}

.node-mini-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.node-mini-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.88rem;
}

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

.node-flag {
  font-size: 1.1rem;
}

.node-name {
  font-weight: 600;
  color: var(--text-main);
}

.node-ping {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--emerald-accent);
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ==========================================================================
   Pricing Section (CRITICAL: 所有价格要同排展示 - Single Row on Desktop)
   ========================================================================== */
.pricing-section {
  background: linear-gradient(180deg, transparent 0%, rgba(6, 12, 26, 0.6) 50%, transparent 100%);
  position: relative;
}

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(16px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 242, 254, 0.3);
  box-shadow: 0 20px 40px -15px rgba(0, 242, 254, 0.15);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 28, 52, 0.92) 0%, rgba(8, 16, 32, 0.95) 100%);
  border: 2px solid var(--cyan-primary);
  box-shadow: var(--shadow-glow);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 24px 50px -10px rgba(0, 242, 254, 0.35);
}

.pricing-ribbon {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #a7f3d0 0%, #34d399 100%);
  color: #022c22;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 14px rgba(52, 211, 153, 0.4);
  white-space: nowrap;
}

.pricing-header {
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-tagline {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 40px;
}

.pricing-amount-wrap {
  margin: 20px 0 16px;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
}

.price-currency {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--cyan-primary);
  margin-right: 2px;
}

.price-number {
  font-size: 3.2rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: #ffffff;
  line-height: 1;
}

.price-period {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-left: 6px;
}

.price-sub-calc {
  width: 100%;
  font-size: 0.82rem;
  color: var(--emerald-accent);
  font-weight: 600;
  margin-top: 6px;
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
}

.pricing-features-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 22px;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.5;
}

.pricing-feature-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--cyan-primary);
  margin-top: 2px;
}

.pricing-feature-item.muted {
  color: var(--text-dim);
}

.pricing-feature-item.muted svg {
  color: var(--text-dim);
}

.pricing-cta-wrap {
  margin-top: auto;
}

.pricing-notice {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 10px;
}

/* ==========================================================================
   Features Grid Section
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: all var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 242, 254, 0.3);
  background: var(--bg-card-hover);
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--cyan-primary);
  border: 1px solid rgba(0, 242, 254, 0.2);
}

.feature-icon-wrap svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #ffffff;
}

.feature-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Live Node Speedtest Table Section
   ========================================================================== */
.speed-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.table-header {
  padding: 20px 24px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.speed-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.speed-table th {
  padding: 16px 24px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-dim);
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border-subtle);
}

.speed-table td {
  padding: 18px 24px;
  font-size: 0.94rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  vertical-align: middle;
}

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

.node-col {
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.latency-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--emerald-accent);
}

.multiplier-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(0, 242, 254, 0.1);
  color: var(--cyan-primary);
  font-weight: 700;
  font-size: 0.82rem;
  font-family: var(--font-mono);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--emerald-accent);
  font-size: 0.85rem;
  font-weight: 600;
}

/* ==========================================================================
   Client Support Grid (Clash / ClashParty / Mihomo / etc.)
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

.client-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 242, 254, 0.35);
  background: var(--bg-card-hover);
}

.client-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-primary);
}

.client-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

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

/* ==========================================================================
   Articles Grid Section (Internal SEO Linking)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 242, 254, 0.35);
  box-shadow: 0 12px 28px -8px rgba(0, 0, 0, 0.5);
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.article-tag {
  color: var(--cyan-primary);
  font-weight: 600;
}

.article-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  color: #ffffff;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

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

.article-card-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-link-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--cyan-primary);
}

.article-link-action svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

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

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.18);
  background: var(--bg-card-hover);
}

.review-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan-primary), var(--purple-primary));
  color: #030712;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}

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

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

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

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

.faq-item[open] {
  border-color: rgba(0, 242, 254, 0.35);
  background: var(--bg-card-hover);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.08rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--cyan-primary);
  line-height: 1;
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

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

/* ==========================================================================
   External Links / Authority Resources Section (外链)
   ========================================================================== */
.outbound-section {
  background: rgba(0, 0, 0, 0.25);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 60px 0;
}

.outbound-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.outbound-card {
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all var(--transition-fast);
}

.outbound-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 242, 254, 0.3);
  background: var(--bg-card-hover);
}

.outbound-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(0, 242, 254, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-primary);
  flex-shrink: 0;
}

.outbound-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 2px;
}

.outbound-info p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Footer Section
   ========================================================================== */
.site-footer {
  background: #02040a;
  border-top: 1px solid var(--border-subtle);
  padding-top: 60px;
  padding-bottom: 40px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 14px;
  max-width: 360px;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--cyan-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: var(--cyan-primary);
}

/* ==========================================================================
   Dedicated Article Single Page Styles (articles/*.html)
   ========================================================================== */
.article-header {
  padding-top: 60px;
  padding-bottom: 40px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.breadcrumb-nav a {
  color: var(--cyan-primary);
}

.article-main-title {
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  color: #ffffff;
}

.article-info-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
  max-width: 1140px;
  margin: 0 auto;
}

.article-body {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 42px;
  backdrop-filter: blur(12px);
  color: #e2e8f0;
  line-height: 1.8;
  font-size: 1.05rem;
}

.article-body h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: #ffffff;
  margin: 36px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan-primary);
  margin: 28px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

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

.article-body ul, .article-body ol {
  margin: 18px 0 24px 24px;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body a {
  color: var(--cyan-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-body a:hover {
  color: #38bdf8;
}

.callout-box {
  background: rgba(0, 242, 254, 0.06);
  border-left: 4px solid var(--cyan-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 28px 0;
  font-size: 0.98rem;
}

.callout-box.tip {
  background: rgba(16, 185, 129, 0.08);
  border-left-color: var(--emerald-accent);
}

.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
}

.sidebar-toc-link {
  color: var(--text-muted);
  transition: color var(--transition-fast);
  display: block;
  line-height: 1.4;
}

.sidebar-toc-link:hover {
  color: var(--cyan-primary);
}

.sidebar-cta-card {
  background: linear-gradient(135deg, rgba(16, 28, 52, 0.95), rgba(8, 16, 32, 0.98));
  border: 1px solid var(--cyan-primary);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.15);
  text-align: center;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }
}

@media (max-width: 860px) {
  .pricing-row {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin-left: auto;
    margin-right: auto;
  }

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

  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

  .nav-menu {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
  }

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

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

  .article-body {
    padding: 24px;
  }
}