/* ==========================================================================
   Tomcat - 天际极光破晓 (Aurora Skyline Odyssey)
   全面动漫 UI 视觉设计系统 (style.css)
   ========================================================================== */

:root {
  /* 基础主色板：深邃天际蓝、破晓金色、极光青蓝、紫罗兰夜空 */
  --color-sky-dark: #070b14;
  --color-sky-twilight: #0d1527;
  --color-sky-card: rgba(13, 21, 39, 0.78);
  --color-sky-card-hover: rgba(19, 31, 58, 0.88);
  --color-sky-border: rgba(56, 189, 248, 0.18);
  --color-sky-border-active: rgba(245, 158, 11, 0.5);
  
  --color-aurora-cyan: #06b6d4;
  --color-aurora-light: #38bdf8;
  --color-aurora-glow: rgba(56, 189, 248, 0.35);
  --color-dawn-amber: #f59e0b;
  --color-dawn-coral: #fb7185;
  --color-dawn-glow: rgba(245, 158, 11, 0.32);
  
  --color-text-bright: #ffffff;
  --color-text-main: #f1f5f9;
  --color-text-sub: #94a3b8;
  --color-text-muted: #64748b;
  
  --gradient-aurora: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-dawn: linear-gradient(135deg, #f59e0b 0%, #f43f5e 100%);
  --gradient-glass-border: linear-gradient(135deg, rgba(56, 189, 248, 0.35), rgba(245, 158, 11, 0.2));
  
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --max-width: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-card: 0 8px 32px rgba(2, 6, 23, 0.45);
  --shadow-glow-cyan: 0 0 25px rgba(6, 182, 212, 0.35);
  --shadow-glow-amber: 0 0 25px rgba(245, 158, 11, 0.35);
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-main);
  background-color: var(--color-sky-dark);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-sky-dark);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(6, 182, 212, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(245, 158, 11, 0.1) 0%, transparent 45%),
    radial-gradient(circle at 50% 85%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    linear-gradient(180deg, #070b14 0%, #0d1527 50%, #070b14 100%);
  background-attachment: fixed;
  color: var(--color-text-main);
  overflow-x: hidden;
  position: relative;
}

/* ==========================================================================
   全站氛围特效层 (Ambient Particle & Starfield Layer)
   ========================================================================== */
.skyline-ambient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.aurora-beam {
  position: absolute;
  top: -20%;
  left: 30%;
  width: 50vw;
  height: 60vh;
  background: radial-gradient(ellipse at center, rgba(6, 182, 212, 0.15) 0%, rgba(99, 102, 241, 0.08) 50%, transparent 70%);
  filter: blur(60px);
  transform: rotate(-15deg);
  animation: auroraDrift 14s ease-in-out infinite alternate;
}

.aurora-beam--dawn {
  top: 10%;
  right: -10%;
  left: auto;
  width: 45vw;
  height: 55vh;
  background: radial-gradient(ellipse at center, rgba(245, 158, 11, 0.12) 0%, rgba(251, 113, 133, 0.06) 50%, transparent 70%);
  filter: blur(70px);
  animation: auroraDrift 18s ease-in-out infinite alternate-reverse;
}

@keyframes auroraDrift {
  0% { transform: translateY(0) scale(1) rotate(-15deg); opacity: 0.6; }
  50% { transform: translateY(30px) scale(1.08) rotate(-10deg); opacity: 0.85; }
  100% { transform: translateY(-20px) scale(0.96) rotate(-18deg); opacity: 0.6; }
}

/* 飘动光点 */
.star-mote {
  position: absolute;
  width: 3px;
  height: 3px;
  background-color: #ffffff;
  border-radius: 50%;
  box-shadow: 0 0 8px #38bdf8;
  animation: floatMote 8s infinite linear;
}

.star-mote:nth-child(1) { top: 20%; left: 12%; animation-duration: 9s; animation-delay: 0s; }
.star-mote:nth-child(2) { top: 35%; left: 88%; animation-duration: 11s; animation-delay: 2s; }
.star-mote:nth-child(3) { top: 60%; left: 24%; animation-duration: 8.5s; animation-delay: 1.5s; }
.star-mote:nth-child(4) { top: 75%; left: 78%; animation-duration: 10s; animation-delay: 3s; }
.star-mote:nth-child(5) { top: 15%; left: 65%; animation-duration: 12s; animation-delay: 0.8s; }

@keyframes floatMote {
  0% { transform: translateY(0) scale(0.8); opacity: 0.2; }
  50% { transform: translateY(-25px) scale(1.2); opacity: 0.9; }
  100% { transform: translateY(-50px) scale(0.8); opacity: 0.2; }
}

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

a:hover {
  color: #7dd3fc;
}

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

.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;
}

/* ==========================================================================
   按钮组件 (Anime Tactile Buttons)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.96rem;
  font-weight: 700;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  user-select: none;
  letter-spacing: 0.02em;
}

/* 主 CTA: 极光流光按钮 */
.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #06b6d4 50%, #3b82f6 100%);
  color: #ffffff;
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(6, 182, 212, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  border-color: #38bdf8;
  color: #ffffff;
}

.btn-primary:hover::before {
  left: 140%;
}

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.3);
}

/* 次级按钮: 雾面磨砂水晶 */
.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  color: var(--color-text-main);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(56, 189, 248, 0.5);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(1px) scale(0.98);
}

/* 金色高光按钮 (用于推荐套餐) */
.btn-amber {
  background: linear-gradient(135deg, #d97706 0%, #f59e0b 50%, #f97316 100%);
  color: #ffffff;
  border-color: rgba(253, 230, 138, 0.4);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-amber:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(245, 158, 11, 0.55);
  color: #ffffff;
}

.btn-large {
  padding: 14px 34px;
  font-size: 1.08rem;
  font-weight: 700;
}

.btn-block {
  width: 100%;
}

/* 点击涟漪动画元素 */
.click-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  transform: scale(0);
  animation: rippleFx 0.55s linear;
  pointer-events: none;
}

@keyframes rippleFx {
  to {
    transform: scale(3.5);
    opacity: 0;
  }
}

/* ==========================================================================
   页头与天际导航 (Skyline Header)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-sky-border);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.brand-icon-wrap, .brand-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(245, 158, 11, 0.2));
  border: 1px solid rgba(56, 189, 248, 0.4);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
  transition: transform var(--transition-fast);
}

.brand-icon svg, .brand-icon-wrap svg {
  width: 24px;
  height: 24px;
}

.brand-logo:hover .brand-icon-wrap, .brand-logo:hover .brand-icon {
  transform: rotate(5deg) scale(1.05);
}

.brand-name {
  background: linear-gradient(120deg, #ffffff 40%, #7dd3fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tag-hud {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-aurora-cyan);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  margin-left: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--color-text-sub);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.menu-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-sky-border);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: #ffffff;
}

.mobile-nav-panel {
  display: none;
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  background: rgba(7, 11, 20, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-sky-border);
  padding: 20px 24px 28px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
}

.mobile-nav-panel.is-open {
  display: block;
}

.mobile-menu-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.mobile-menu-item a {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   Hero 主屏视觉与动漫交互舞台 (Hero Showcase Stage)
   ========================================================================== */
.hero-section {
  padding: 60px 0 70px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-full);
  padding: 5px 16px;
  font-size: 0.86rem;
  font-weight: 700;
  color: #7dd3fc;
  margin-bottom: 22px;
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.2);
}

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

@keyframes pulseNeon {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1.22;
  color: #ffffff;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-title-highlight {
  background: linear-gradient(120deg, #38bdf8 0%, #f59e0b 60%, #fb7185 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--color-text-sub);
  margin-bottom: 32px;
  max-width: 560px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

/* 信任指标计数条 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-sky-border);
}

.metric-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  text-align: center;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.metric-card:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.3);
}

.metric-num {
  font-size: 1.35rem;
  font-weight: 800;
  color: #38bdf8;
  line-height: 1.2;
}

.metric-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* 动漫领航员交互舞台 (Right Column Mascot Stage) */
.anime-mascot-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 2;
}

.anime-card-canvas {
  position: relative;
  width: 100%;
  max-width: 440px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(17, 24, 39, 0.8) 0%, rgba(13, 21, 39, 0.95) 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 32px rgba(6, 182, 212, 0.2);
  padding: 18px;
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
}

/* 角色插画背景与光圈 */
.anime-card-glow-portal {
  position: absolute;
  top: 10%;
  left: 10%;
  width: 80%;
  height: 80%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.28) 0%, rgba(245, 158, 11, 0.15) 50%, transparent 70%);
  filter: blur(28px);
  border-radius: 50%;
  pointer-events: none;
}

.anime-img-wrap {
  position: relative;
  width: 100%;
  height: 380px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #070b14;
}

.anime-main-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.4s ease;
}

.anime-card-canvas:hover .anime-main-img {
  transform: scale(1.03);
}

/* HUD 实时网络测速状态条 */
.anime-hud-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding: 8px 12px;
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}

.hud-status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: #38bdf8;
}

.hud-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.hud-latency-value {
  color: #fbbf24;
  font-family: monospace;
  font-weight: 700;
}

/* 动漫领航员对话气泡与交互 Chips */
.anime-dialogue-box {
  width: 100%;
  max-width: 440px;
  margin-top: 16px;
  background: rgba(13, 21, 39, 0.9);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(245, 158, 11, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  position: relative;
}

.dialogue-speaker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.speaker-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid #38bdf8;
  object-fit: cover;
}

.speaker-info-name {
  font-size: 0.9rem;
  font-weight: 800;
  color: #ffffff;
}

.speaker-info-title {
  font-size: 0.74rem;
  color: var(--color-aurora-cyan);
}

.dialogue-text {
  font-size: 0.92rem;
  line-height: 1.6;
  color: #e2e8f0;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 12px;
  min-height: 48px;
  transition: opacity 0.25s ease;
}

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

.dialogue-chip-btn {
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-full);
  color: #7dd3fc;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dialogue-chip-btn:hover, .dialogue-chip-btn.active {
  background: var(--color-aurora-cyan);
  border-color: var(--color-aurora-cyan);
  color: #ffffff;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.5);
  transform: translateY(-1px);
}

/* ==========================================================================
   区块通用骨架与标题 (Sections & Titles)
   ========================================================================== */
.section {
  padding: 76px 0;
  position: relative;
}

.section-alt {
  background: rgba(13, 21, 39, 0.5);
  border-top: 1px solid var(--color-sky-border);
  border-bottom: 1px solid var(--color-sky-border);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-aurora-cyan);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.section-title {
  font-size: 2.15rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

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

/* ==========================================================================
   1. AI 支持模块 (AI Productivity Acceleration)
   ========================================================================== */
.ai-section-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.ai-card {
  background: var(--color-sky-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.ai-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-aurora);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.ai-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 24px rgba(6, 182, 212, 0.25);
}

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

.ai-card-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-aurora-cyan);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.ai-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.ai-card-desc {
  font-size: 0.94rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ==========================================================================
   2. 特性卡片模块 (Features - 4 Cards)
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--color-sky-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  gap: 22px;
  position: relative;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.35), 0 0 20px rgba(245, 158, 11, 0.2);
}

.feature-icon-wrapper {
  flex-shrink: 0;
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(245, 158, 11, 0.15));
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.2);
}

.feature-info {
  flex: 1;
}

.feature-info h3 {
  font-size: 1.22rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-info p {
  font-size: 0.94rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ==========================================================================
   3. 流媒体支持模块 (Streaming Support with Media Mockup)
   ========================================================================== */
.stream-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.stream-card {
  background: var(--color-sky-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.stream-card:hover {
  transform: translateY(-5px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 22px rgba(6, 182, 212, 0.25);
}

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

.stream-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.stream-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
}

.stream-card-desc {
  font-size: 0.93rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ==========================================================================
   4. 使用场景卡模块 (Scenario Cards - 3 Cards with Illustration)
   ========================================================================== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.scenario-card {
  background: var(--color-sky-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.scenario-card:hover {
  transform: translateY(-5px);
  border-color: rgba(245, 158, 11, 0.45);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 20px rgba(245, 158, 11, 0.2);
}

.scenario-device-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 12px;
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.scenario-desc {
  font-size: 0.94rem;
  color: var(--color-text-sub);
  line-height: 1.7;
  flex-grow: 1;
}

/* ==========================================================================
   5. 优势模块 (Benefits)
   ========================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.benefit-item {
  background: var(--color-sky-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.benefit-item:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.4);
}

.benefit-item h3 {
  font-size: 1.22rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.benefit-item p {
  font-size: 0.93rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ==========================================================================
   6. 定价套餐区 (Pricing Deck - 3 Tiers with Billing Selector)
   ========================================================================== */
.pricing-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
}

.pricing-switch-wrap {
  display: flex;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-full);
  padding: 4px;
}

.billing-tab-btn {
  background: none;
  border: none;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-sub);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.billing-tab-btn.active {
  background: var(--color-aurora-cyan);
  color: #ffffff;
  box-shadow: 0 0 14px rgba(6, 182, 212, 0.45);
}

.pricing-discount-badge {
  font-size: 0.78rem;
  font-weight: 800;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.35);
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.pricing-deck {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background: var(--color-sky-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5);
}

/* 热门推荐主力档 */
.pricing-card.is-popular {
  border-color: rgba(245, 158, 11, 0.6);
  background: linear-gradient(170deg, rgba(20, 27, 47, 0.9) 0%, rgba(13, 21, 39, 0.95) 100%);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.5), 0 0 28px rgba(245, 158, 11, 0.25);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}

.pricing-tier-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.pricing-tier-target {
  font-size: 0.88rem;
  color: var(--color-text-sub);
  margin-bottom: 22px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--color-sky-border);
}

.pricing-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-aurora-cyan);
}

.pricing-num {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
}

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

.pricing-specs {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-spec-item {
  font-size: 0.92rem;
  color: #cbd5e1;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-spec-item svg {
  flex-shrink: 0;
  color: #38bdf8;
}

/* ==========================================================================
   7. FAQ 常见问题 (FAQ Accordion - 6 Items)
   ========================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--color-sky-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item.is-active {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  font-size: 1.08rem;
  font-weight: 700;
  text-align: left;
  color: #ffffff;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.04);
}

.faq-icon {
  flex-shrink: 0;
  color: #38bdf8;
  transition: transform var(--transition-smooth);
}

.faq-item.is-active .faq-icon {
  transform: rotate(180deg);
  color: #fbbf24;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  background: rgba(0, 0, 0, 0.2);
}

.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 0.96rem;
  line-height: 1.8;
  color: #cbd5e1;
}

/* ==========================================================================
   Final CTA 破晓终极转化区
   ========================================================================== */
.final-cta-section {
  padding: 84px 0;
  position: relative;
  background: radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.15) 0%, rgba(13, 21, 39, 0.9) 70%);
  border-top: 1px solid var(--color-sky-border);
  border-bottom: 1px solid var(--color-sky-border);
  text-align: center;
}

.final-cta-inner {
  max-width: 740px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.final-cta-title {
  font-size: 2.35rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.final-cta-desc {
  font-size: 1.15rem;
  color: var(--color-text-sub);
  margin-bottom: 32px;
  line-height: 1.7;
}

/* ==========================================================================
   页脚 (Site Footer)
   ========================================================================== */
.site-footer {
  background: #050811;
  border-top: 1px solid var(--color-sky-border);
  padding: 50px 0 36px;
  margin-top: auto;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.footer-nav a {
  color: var(--color-text-sub);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: #38bdf8;
}

.footer-disclaimer {
  max-width: 720px;
  margin: 0 auto 14px;
  line-height: 1.7;
  font-size: 0.86rem;
}

.footer-copyright {
  font-size: 0.84rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   移动端吸底 CTA (Sticky Mobile CTA)
   ========================================================================== */
.sticky-mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(7, 11, 20, 0.95);
  backdrop-filter: blur(20px);
  border-top: 1px solid rgba(56, 189, 248, 0.3);
  padding: 12px 18px;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.6);
  align-items: center;
  justify-content: space-between;
}

.sticky-mobile-info {
  display: flex;
  flex-direction: column;
  font-size: 0.95rem;
  font-weight: 800;
  color: #ffffff;
}

.sticky-mobile-info span {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-aurora-cyan);
}

.sticky-mobile-cta.is-visible {
  display: flex;
}

/* ==========================================================================
   文章与页面通用样式 (Article, Legal, Guides)
   ========================================================================== */
.page-container, .article-container {
  width: 100%;
  max-width: 880px;
  margin: 44px auto 72px;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.breadcrumb-nav {
  margin-bottom: 26px;
  font-size: 0.9rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--color-text-muted);
}

.breadcrumb-separator {
  color: rgba(255, 255, 255, 0.2);
}

.breadcrumb-item a {
  color: var(--color-text-sub);
}

.breadcrumb-item a:hover {
  color: #38bdf8;
}

.page-header, .article-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-sky-border);
}

.page-title, .article-title {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1.3;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--color-text-sub);
}

.page-content, .article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #e2e8f0;
}

.page-content p, .article-body p {
  margin-bottom: 22px;
}

.page-content h2, .article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: #ffffff;
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-sky-border);
}

.page-content h3, .article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #7dd3fc;
  margin: 28px 0 14px;
}

.page-content ul, .article-body ul {
  list-style: disc;
  padding-left: 26px;
  margin-bottom: 22px;
}

.page-content ol, .article-body ol {
  list-style: decimal;
  padding-left: 26px;
  margin-bottom: 22px;
}

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

.page-content strong, .article-body strong {
  font-weight: 700;
  color: #ffffff;
}

.content-table-wrapper {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-md);
  background: var(--color-sky-card);
}

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

.content-table th, .content-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-sky-border);
}

.content-table th {
  background: rgba(6, 182, 212, 0.12);
  font-weight: 700;
  color: #ffffff;
}

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

.article-callout {
  background: linear-gradient(145deg, rgba(13, 21, 39, 0.95), rgba(7, 11, 20, 0.95));
  border: 1px solid rgba(56, 189, 248, 0.45);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin: 40px 0;
  text-align: center;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 24px rgba(6, 182, 212, 0.2);
}

.article-callout-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.article-callout-desc {
  font-size: 0.98rem;
  color: var(--color-text-sub);
  margin-bottom: 20px;
}

.article-related-links {
  background: var(--color-sky-card);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-top: 40px;
}

.article-related-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.article-related-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-related-list a {
  font-size: 0.96rem;
  color: #7dd3fc;
}

/* 指南卡片 (Guides Grid) */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin: 32px 0;
}

.guide-card {
  background: var(--color-sky-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-sky-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.guide-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 20px rgba(6, 182, 212, 0.2);
}

.guide-card-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-aurora-cyan);
  margin-bottom: 12px;
}

.guide-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.guide-card-title a {
  color: #ffffff;
}

.guide-card-title a:hover {
  color: #38bdf8;
}

.guide-card-desc {
  font-size: 0.92rem;
  color: var(--color-text-sub);
  line-height: 1.7;
  margin-bottom: 18px;
  flex-grow: 1;
}

/* 网站地图列表 (Sitemap Page) */
.sitemap-section {
  margin-bottom: 36px;
}

.sitemap-section-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-sky-border);
}

.sitemap-links-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.sitemap-links-list li a {
  display: inline-block;
  font-size: 0.98rem;
  color: #cbd5e1;
  padding: 6px 0;
}

.sitemap-links-list li a:hover {
  color: #38bdf8;
}

/* ==========================================================================
   响应式断点 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .hero-cta-group {
    justify-content: center;
  }

  .hero-metrics {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .anime-mascot-stage {
    margin-top: 20px;
  }

  .ai-section-grid,
  .stream-grid,
  .scenario-grid,
  .benefits-grid,
  .pricing-deck {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .feature-grid,
  .guides-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.15rem;
  }

  .hero-subtitle {
    font-size: 1.02rem;
  }

  .nav-menu, .nav-actions .btn {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .sitemap-links-list {
    grid-template-columns: 1fr;
  }

  .article-title, .page-title {
    font-size: 1.8rem;
  }

  body {
    padding-bottom: 68px; /* 吸底 CTA 间距 */
  }
}

/* 无障碍降低动态效果支持 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .aurora-beam, .aurora-beam--dawn, .star-mote, .hero-pulse-dot {
    animation: none !important;
  }
}