/* ==========================================================================
   YKKCLOUD - Hydrodynamic Water-Goddess Fluid-Luxury UI Stylesheet
   Palette: Deep Oceanic Twilight & Luminescent Aqua Crystal Cyan
   Pure Native CSS | Zero Dependencies | 60 FPS Fluid Dynamics
   ========================================================================== */

:root {
  /* ================= Light Mode (Pure Crystalline Spring Water) ================= */
  --bg-abyssal: #f0f7ff;
  --bg-canvas: #f8fafc;
  --bg-surface: rgba(255, 255, 255, 0.78);
  --bg-surface-hover: rgba(255, 255, 255, 0.92);
  --bg-acrylic: rgba(255, 255, 255, 0.65);
  
  --border-glass: rgba(56, 189, 248, 0.28);
  --border-glass-hover: rgba(56, 189, 248, 0.6);
  --border-rim: rgba(129, 140, 248, 0.35);

  --text-main: #0a1128;
  --text-sub: #334155;
  --text-muted: #64748b;
  --text-cyan: #0284c7;

  /* Water-Goddess Luminescent Accents */
  --aqua-cyan: #0284c7;
  --aqua-cyan-glow: rgba(56, 189, 248, 0.35);
  --aqua-foam: #f8fafc;
  --ethereal-violet: #6366f1;
  --deep-ocean-blue: #0369a1;
  --emerald-ping: #059669;

  --water-gradient: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%);
  --water-gradient-hover: linear-gradient(135deg, #0369a1 0%, #4338ca 100%);
  --waterdrop-highlight: linear-gradient(180deg, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.05) 100%);
  
  --shadow-caustic: 0 10px 30px -5px rgba(2, 132, 199, 0.12), 0 0 20px rgba(56, 189, 248, 0.1);
  --shadow-card: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.35);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1220px;
  --radius-waterdrop: 22px;
  --radius-pill: 9999px;
  
  --transition-fluid: 0.35s cubic-bezier(0.25, 1, 0.5, 1);
}

/* ================= Dark Mode (Deep Oceanic Twilight Abyss) ================= */
[data-theme="dark"] {
  --bg-abyssal: #080a18;
  --bg-canvas: #050711;
  --bg-surface: rgba(12, 18, 36, 0.72);
  --bg-surface-hover: rgba(18, 27, 54, 0.85);
  --bg-acrylic: rgba(14, 21, 44, 0.55);
  
  --border-glass: rgba(56, 189, 248, 0.18);
  --border-glass-hover: rgba(56, 189, 248, 0.45);
  --border-rim: rgba(129, 140, 248, 0.3);

  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  --text-cyan: #38bdf8;

  --aqua-cyan: #38bdf8;
  --aqua-cyan-glow: rgba(56, 189, 248, 0.45);
  --aqua-foam: #f8fafc;
  --ethereal-violet: #818cf8;
  --deep-ocean-blue: #0284c7;
  --emerald-ping: #34d399;

  --water-gradient: linear-gradient(135deg, #0284c7 0%, #818cf8 100%);
  --water-gradient-hover: linear-gradient(135deg, #38bdf8 0%, #6366f1 100%);
  --waterdrop-highlight: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 100%);

  --shadow-caustic: 0 10px 40px -5px rgba(8, 10, 24, 0.8), 0 0 25px rgba(56, 189, 248, 0.18);
  --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 35px rgba(56, 189, 248, 0.4);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
  font-family: var(--font-sans);
  background-color: var(--bg-abyssal);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-fluid), color var(--transition-fluid);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  background: var(--bg-canvas);
}

/* Water Canvas Background */
#fluid-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

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

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-fluid);
}

.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;
}

.brand-logo-img {
  height: 42px;
  width: auto;
  border-radius: 10px;
  background-color: #101323;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22), 0 0 12px var(--aqua-cyan-glow);
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: block;
  transition: transform var(--transition-fluid), box-shadow var(--transition-fluid);
}

.brand-logo-img:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
}

/* Navigation Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-sub);
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  position: relative;
  transition: all var(--transition-fluid);
}

.nav-link:hover {
  color: var(--aqua-cyan);
  background: rgba(56, 189, 248, 0.08);
}

/* Special Badge for '推荐资讯' */
.nav-badge-pill {
  position: relative;
}

.nav-badge-pill::after {
  content: "NEW";
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: #fff;
  background: var(--ethereal-violet);
  padding: 1px 5px;
  border-radius: 99px;
  margin-left: 5px;
  vertical-align: 2px;
  box-shadow: 0 0 8px rgba(129, 140, 248, 0.5);
}

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

/* Theme Toggle Button - Refined Transparent Water Crystal Glass */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--bg-acrylic);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-fluid);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.theme-toggle-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--aqua-cyan);
  box-shadow: 0 0 16px var(--aqua-cyan-glow);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

.theme-toggle-btn .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
.theme-toggle-btn .icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.4);
}

[data-theme="dark"] .theme-toggle-btn .icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.4);
}
[data-theme="dark"] .theme-toggle-btn .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  color: var(--aqua-cyan);
}

/* Glowing Deep-Blue "免费注册 →" Pill Button Commanding the Header */
.btn-header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-size: 0.94rem;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, #0284c7 0%, #1e40af 100%);
  border: 1px solid rgba(56, 189, 248, 0.5);
  box-shadow: 0 4px 18px rgba(2, 132, 199, 0.4), 0 0 16px rgba(56, 189, 248, 0.25);
  transition: all var(--transition-fluid);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-header-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: 0.6s ease;
}

.btn-header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(2, 132, 199, 0.6), 0 0 25px rgba(56, 189, 248, 0.45);
  color: #ffffff;
}

.btn-header-cta:hover::before {
  left: 100%;
}

/* Generic Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: all var(--transition-fluid);
  text-align: center;
  cursor: pointer;
}

.btn-primary {
  background: var(--water-gradient);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 6px 22px rgba(2, 132, 199, 0.35);
}

.btn-primary:hover {
  background: var(--water-gradient-hover);
  box-shadow: 0 8px 30px rgba(56, 189, 248, 0.5);
  transform: translateY(-3px);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--aqua-cyan);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
  font-weight: 700;
}

/* ==========================================================================
   Hero Section with 3D Water-Spiral Ring & Fluid Atmosphere
   ========================================================================== */
.hero-section {
  padding: 80px 0 90px 0;
  position: relative;
  overflow: hidden;
}

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

.hero-content {
  position: relative;
  z-index: 3;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--aqua-cyan);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-pill-badge .waterdrop-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--aqua-cyan);
  box-shadow: 0 0 10px var(--aqua-cyan);
  animation: waterdrop-pulse 2s infinite ease-in-out;
}

@keyframes waterdrop-pulse {
  0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.8); }
  70% { transform: scale(1.15); box-shadow: 0 0 0 10px rgba(56, 189, 248, 0); }
  100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0); }
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -1.2px;
  margin-bottom: 22px;
  color: var(--text-main);
}

.hero-title .brand-accent {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  text-shadow: 0 0 35px var(--aqua-cyan-glow);
}

.hero-quote-block {
  margin-bottom: 20px;
  padding-left: 18px;
  border-left: 3px solid var(--aqua-cyan);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
}

.hero-quote-block span {
  display: block;
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--aqua-cyan);
  margin-top: 4px;
}

.hero-intro {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-sub);
  margin-bottom: 36px;
  max-width: 620px;
}

.hero-cta-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

/* Hero Live Metadata Badges */
.hero-metadata-badges {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.meta-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--bg-acrylic);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-sub);
}

.meta-badge svg {
  color: var(--aqua-cyan);
  width: 17px;
  height: 17px;
}

/* ==========================================================================
   Visual Center: 3D Interactive Water-Spiral Ring Component
   ========================================================================== */
.water-spiral-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
  min-height: 440px;
}

.spiral-caustic-ambient {
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22) 0%, rgba(129, 140, 248, 0.12) 50%, transparent 70%);
  filter: blur(40px);
  animation: caustic-breathe 6s ease-in-out infinite alternate;
}

@keyframes caustic-breathe {
  0% { transform: scale(0.85); opacity: 0.5; }
  100% { transform: scale(1.15); opacity: 0.85; }
}

.water-spiral-stage {
  position: relative;
  width: 320px;
  height: 320px;
  transform-style: preserve-3d;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spiral-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px dashed rgba(56, 189, 248, 0.5);
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.25), inset 0 0 15px rgba(129, 140, 248, 0.2);
  transition: all var(--transition-fluid);
}

.ring-outer {
  width: 310px;
  height: 310px;
  animation: rotate-ring-3d-1 20s linear infinite;
  border-color: rgba(56, 189, 248, 0.4);
}

.ring-middle {
  width: 240px;
  height: 240px;
  animation: rotate-ring-3d-2 14s linear infinite reverse;
  border-color: rgba(129, 140, 248, 0.5);
  border-style: solid;
  border-width: 1.5px;
}

.ring-inner {
  width: 170px;
  height: 170px;
  animation: rotate-ring-3d-3 10s linear infinite;
  border-color: rgba(56, 189, 248, 0.65);
}

@keyframes rotate-ring-3d-1 {
  0% { transform: rotateX(60deg) rotateZ(0deg); }
  100% { transform: rotateX(60deg) rotateZ(360deg); }
}

@keyframes rotate-ring-3d-2 {
  0% { transform: rotateY(55deg) rotateZ(0deg); }
  100% { transform: rotateY(55deg) rotateZ(360deg); }
}

@keyframes rotate-ring-3d-3 {
  0% { transform: rotateX(45deg) rotateY(30deg) rotateZ(0deg); }
  100% { transform: rotateX(45deg) rotateY(30deg) rotateZ(360deg); }
}

.waterdrop-core-orb {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #ffffff 0%, #38bdf8 45%, #0284c7 80%, #080a18 100%);
  box-shadow: 0 0 45px rgba(56, 189, 248, 0.7), inset 0 0 20px rgba(255, 255, 255, 0.6);
  position: relative;
  z-index: 5;
  animation: core-float 4s ease-in-out infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

@keyframes core-float {
  0%, 100% { transform: translateY(0px) scale(1); }
  50% { transform: translateY(-8px) scale(1.04); }
}

.floating-speed-badge {
  position: absolute;
  padding: 10px 18px;
  border-radius: var(--radius-waterdrop);
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge-top-right {
  top: 15px;
  right: -10px;
  animation: badge-float-1 5s ease-in-out infinite;
}

.badge-bottom-left {
  bottom: 20px;
  left: -15px;
  animation: badge-float-2 6s ease-in-out infinite 1s;
}

@keyframes badge-float-1 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes badge-float-2 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(7px); }
}

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

.section-alt {
  background: var(--bg-abyssal);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--aqua-cyan);
  margin-bottom: 12px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ==========================================================================
   Waterdrop-Contoured Transparent Acrylic Glass Panels (Core Features)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.waterdrop-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 38px 32px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-fluid);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.waterdrop-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: var(--waterdrop-highlight);
  pointer-events: none;
  opacity: 0.6;
}

.waterdrop-panel::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--water-gradient);
  opacity: 0;
  transition: opacity var(--transition-fluid);
}

.waterdrop-panel:hover {
  transform: translateY(-8px);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-caustic), 0 0 25px var(--aqua-cyan-glow);
}

.waterdrop-panel:hover::after {
  opacity: 1;
}

.feature-icon-water {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(129, 140, 248, 0.15) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--aqua-cyan);
  margin-bottom: 24px;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.15);
}

.feature-icon-water svg {
  width: 28px;
  height: 28px;
}

.panel-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.panel-desc {
  font-size: 0.98rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.panel-feature-list {
  list-style: none;
  border-top: 1px solid var(--border-glass);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-feature-list li {
  font-size: 0.92rem;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-feature-list li svg {
  width: 17px;
  height: 17px;
  color: var(--emerald-ping);
  flex-shrink: 0;
}

/* ==========================================================================
   Regional Route Status / Optical Ping Condensation Board
   "Hovering over regional proxy routes clears water condensation off the frosted glass tiles,
   bringing sub-millisecond ping numbers into razor-sharp optical focus."
   ========================================================================== */
.route-section-wrap {
  margin-top: 50px;
}

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

.route-tile {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 24px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
  cursor: pointer;
  transition: all var(--transition-fluid);
}

/* Condensation Frosted Layer */
.route-tile .condensation-layer {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.25) 0%, rgba(200, 230, 255, 0.1) 100%);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  transition: opacity 0.4s ease, backdrop-filter 0.4s ease;
  pointer-events: none;
  opacity: 0.85;
}

.route-tile:hover .condensation-layer {
  opacity: 0;
  backdrop-filter: blur(0px);
}

.route-tile:hover {
  transform: translateY(-4px);
  border-color: var(--aqua-cyan);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.25);
}

.route-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.route-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.route-type-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--aqua-cyan);
}

.ping-display {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.ping-val {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--emerald-ping);
  line-height: 1;
  filter: blur(2px);
  transition: filter 0.3s ease, color 0.3s ease;
}

.route-tile:hover .ping-val {
  filter: blur(0px);
  text-shadow: 0 0 10px rgba(52, 211, 153, 0.6);
}

.ping-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.route-status-line {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ==========================================================================
   Showcase Grid (Streaming & AI Dual Cards)
   ========================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 40px 34px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  transition: all var(--transition-fluid);
  display: flex;
  flex-direction: column;
}

.showcase-card:hover {
  transform: translateY(-5px);
  border-color: var(--aqua-cyan);
  box-shadow: var(--shadow-caustic);
}

.showcase-header {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 22px;
}

.showcase-icon-box {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--aqua-cyan);
  flex-shrink: 0;
}

.showcase-header h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.showcase-header p {
  font-size: 0.92rem;
  color: var(--text-sub);
}

.showcase-body {
  margin-bottom: 24px;
  flex-grow: 1;
}

.showcase-desc {
  font-size: 0.98rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 22px;
}

.platform-pill-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.water-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--bg-acrylic);
  border: 1px solid var(--border-glass);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fluid);
}

.water-pill:hover {
  border-color: var(--aqua-cyan);
  background: rgba(56, 189, 248, 0.12);
  transform: translateY(-2px);
}

.showcase-perks {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border-glass);
}

.showcase-perks li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.93rem;
  color: var(--text-sub);
}

.showcase-perks li svg {
  width: 17px;
  height: 17px;
  color: var(--aqua-cyan);
  flex-shrink: 0;
}

/* ==========================================================================
   Pricing Table - Authentic Realistic Market Packages
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 42px 32px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  transition: all var(--transition-fluid);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-caustic);
}

.pricing-card.featured {
  border-color: var(--aqua-cyan);
  box-shadow: 0 0 35px var(--aqua-cyan-glow);
  transform: scale(1.03);
  z-index: 5;
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-6px);
}

.pricing-badge-top {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--water-gradient);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 5px 18px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
  white-space: nowrap;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 24px;
  min-height: 44px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-glass);
}

.currency {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
}

.period {
  font-size: 0.94rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.94rem;
  color: var(--text-sub);
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  color: var(--emerald-ping);
  flex-shrink: 0;
}

.plan-cta {
  width: 100%;
}

/* ==========================================================================
   User Testimonials (Reviews)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 34px 28px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fluid);
}

.review-card:hover {
  transform: translateY(-5px);
  border-color: var(--aqua-cyan);
  box-shadow: var(--shadow-caustic);
}

.rating-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
}

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

.review-text {
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.reviewer-profile {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-glass);
  padding-top: 18px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--water-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.reviewer-info h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-main);
}

.reviewer-info p {
  font-size: 0.84rem;
  color: var(--text-muted);
}

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

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: all var(--transition-fluid);
}

.faq-item:hover {
  border-color: var(--aqua-cyan);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 26px;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--aqua-cyan);
  transition: transform var(--transition-fluid);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.25, 1, 0.5, 1);
  padding: 0 26px;
  color: var(--text-sub);
  font-size: 0.97rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding-bottom: 22px;
}

/* ==========================================================================
   Final CTA Fluid Banner
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.9) 0%, rgba(129, 140, 248, 0.85) 100%);
  border-radius: var(--radius-waterdrop);
  padding: 60px 40px;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(2, 132, 199, 0.35), 0 0 35px var(--aqua-cyan-glow);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.cta-banner-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
}

.cta-banner p {
  font-size: 1.15rem;
  opacity: 0.95;
  line-height: 1.65;
  margin-bottom: 34px;
}

.btn-white-fluid {
  background: #ffffff;
  color: #0284c7;
  font-weight: 800;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.2);
}

.btn-white-fluid:hover {
  background: #f0f9ff;
  color: #0369a1;
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Footer - Strictly 4 Titles Only
   ========================================================================== */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-glass);
  background: var(--bg-surface);
  padding: 50px 0 38px 0;
  backdrop-filter: blur(14px);
  position: relative;
  z-index: 5;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 52px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-sub);
  transition: all var(--transition-fluid);
  position: relative;
}

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

.footer-copyright {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-copyright a {
  color: var(--aqua-cyan);
}

/* ==========================================================================
   Article / Insights Page Styles
   ========================================================================== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 34px 30px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fluid);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--aqua-cyan);
  box-shadow: var(--shadow-caustic);
}

.article-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--aqua-cyan);
  background: rgba(56, 189, 248, 0.1);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.article-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.35;
}

.article-summary {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-glass);
  padding-top: 16px;
  font-size: 0.86rem;
/* ==========================================================================
   Full Article Page Typography & Structure (SEO Long-form Post Layout)
   ========================================================================== */
.article-full-wrap {
  padding: 50px 0 80px 0;
  max-width: 900px;
  margin: 0 auto;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--text-sub);
}
.breadcrumbs a:hover {
  color: var(--aqua-cyan);
}

.article-header-full {
  margin-bottom: 36px;
}

.article-title-main {
  font-size: 2.35rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-glass);
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Table of Contents (文章目录) */
.article-toc {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 24px 28px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
}

.toc-header {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-list li a {
  font-size: 0.95rem;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fluid);
}

.toc-list li a:hover {
  color: var(--aqua-cyan);
  padding-left: 6px;
}

/* Article Body Typography */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-sub);
}

.article-body h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 48px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 32px;
  margin-bottom: 14px;
}

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

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 26px;
}

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

.article-body strong {
  color: var(--text-main);
}

.article-body a {
  color: var(--aqua-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a:hover {
  color: var(--ethereal-violet);
}

/* Responsive Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: 12px;
  border: 1px solid var(--border-glass);
}

.seo-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.seo-table th {
  background: rgba(56, 189, 248, 0.1);
  color: var(--text-main);
  padding: 14px 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border-glass);
}

.seo-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-glass);
  color: var(--text-sub);
}

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

/* Callout Box */
.callout-box {
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--aqua-cyan);
  padding: 20px 24px;
  border-radius: 0 14px 14px 0;
  margin: 28px 0;
}

.callout-box p:last-child {
  margin-bottom: 0;
}

/* Inline In-Article CTA Banner */
.article-cta-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.12) 0%, rgba(129, 140, 248, 0.12) 100%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 32px 28px;
  margin: 40px 0;
  text-align: center;
  backdrop-filter: blur(14px);
}

.article-cta-box h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.article-cta-box p {
  color: var(--text-sub);
  margin-bottom: 20px;
}

/* Article FAQ Section */
.article-faq-wrap {
  margin-top: 50px;
  padding-top: 36px;
  border-top: 2px dashed var(--border-glass);
}

/* Related Reading Section (相关阅读) */
.related-posts-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-glass);
}

.related-posts-section h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 22px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 20px;
  display: block;
  transition: all var(--transition-fluid);
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--aqua-cyan);
  box-shadow: var(--shadow-caustic);
}

.related-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.4;
}

.related-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 0;
}

/* Secondary Pages Styles (About, Terms, Privacy, Sitemap) */
.page-header {
  padding: 64px 0 42px 0;
  text-align: center;
  background: var(--bg-abyssal);
  border-bottom: 1px solid var(--border-glass);
}

.page-title {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 14px;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--text-sub);
  max-width: 680px;
  margin: 0 auto;
}

.page-content-wrap {
  padding: 60px 0 90px 0;
  max-width: 900px;
  margin: 0 auto;
}

.prose-block {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-waterdrop);
  padding: 42px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  margin-bottom: 34px;
}

.prose-block h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.prose-block h2 svg {
  width: 24px;
  height: 24px;
  color: var(--aqua-cyan);
}

.prose-block p {
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 1rem;
}

.prose-block ul {
  list-style: disc;
  padding-left: 24px;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}

.badge-alert {
  background: rgba(244, 63, 94, 0.08);
  border-left: 4px solid #f43f5e;
  padding: 18px 22px;
  border-radius: 0 16px 16px 0;
  margin: 20px 0;
  color: var(--text-sub);
}

.badge-success {
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--aqua-cyan);
  padding: 18px 22px;
  border-radius: 0 16px 16px 0;
  margin: 20px 0;
  color: var(--text-sub);
}

/* ==========================================================================
   Responsive Media Queries (@media)
   Strict Mobile Single Column & Finger-Friendly Tap Targets
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-title {
    font-size: 3rem;
  }

  .hero-quote-block {
    border-left: none;
    border-top: 2px solid var(--aqua-cyan);
    padding-left: 0;
    padding-top: 14px;
  }

  .hero-intro {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-wrap,
  .hero-metadata-badges {
    justify-content: center;
  }

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

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-wrap {
    height: 66px;
  }

  .brand-logo-img {
    height: 36px;
  }

  .hero-section {
    padding: 44px 0 40px 0;
  }

  .hero-title {
    font-size: 2.2rem;
    letter-spacing: -0.6px;
  }

  .hero-quote-block {
    font-size: 1.15rem;
  }

  .hero-intro {
    font-size: 1rem;
    margin-bottom: 26px;
  }

  .hero-cta-wrap {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-cta-wrap .btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 1.02rem;
  }

  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .route-grid,
  .article-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .waterdrop-panel,
  .pricing-card,
  .showcase-card,
  .review-card,
  .prose-block {
    padding: 26px 20px;
    border-radius: 18px;
  }

  .cta-banner {
    padding: 44px 22px;
  }

  .cta-banner h2 {
    font-size: 1.85rem;
  }

  .footer-nav {
    flex-direction: column;
    gap: 20px;
  }

  .page-title {
    font-size: 2rem;
  }

  .water-spiral-wrapper {
    min-height: 320px;
  }

  .water-spiral-stage {
    width: 260px;
    height: 260px;
  }

  .ring-outer {
    width: 250px;
    height: 250px;
  }

  .ring-middle {
    width: 190px;
    height: 190px;
  }

  .ring-inner {
    width: 140px;
    height: 140px;
  }

  .waterdrop-core-orb {
    width: 85px;
    height: 85px;
  }
}