/* ====================================================================
   耶耶云 官方视觉设计系统 -【月夜流萤 · 幻野幽境与星之使者】
   (Moonlit Firefly Glade · Astral Sylph & Bioluminescent UI)
   - 视觉基调：深邃星夜极光背景 + 翠荧与冰蓝流光 + 浮岛磨砂玻璃质感
   - 动漫视觉元素：星之风行精灵立绘、发丝与衣摆微风浮动、萤火光轨与星尘法阵
   - 动态交互：3D 悬停微倾斜、磁吸按钮、呼吸光芒、光泽扫过与平滑滚动展现
   - 严格性能与无障碍：零网络字体、GPU 硬件加速渲染、prefers-reduced-motion 支持
   ==================================================================== */

:root {
  /* 基础与深空色阶 */
  --color-bg-deep: #080d1a;
  --color-bg-surface: #0e172a;
  --color-bg-card: rgba(15, 23, 42, 0.78);
  --color-bg-card-hover: rgba(22, 33, 62, 0.9);
  --color-bg-glass: rgba(15, 23, 42, 0.65);
  --color-bg-subtle: rgba(30, 41, 59, 0.6);

  /* 边框与光影色系 */
  --color-border: rgba(56, 189, 248, 0.18);
  --color-border-glow: rgba(52, 211, 153, 0.45);
  --color-border-hover: rgba(56, 189, 248, 0.6);

  /* 文字颜色阶 */
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-text-subtle: #64748b;

  /* 月夜流萤主题核心能量色彩 */
  --color-firefly-glow: #34d399;     /* 萤火嫩翠绿 */
  --color-aurora-cyan: #38bdf8;      /* 极光冰蓝 */
  --color-star-indigo: #6366f1;      /* 幽夜星靛 */
  --color-moon-gold: #fbbf24;        /* 萤光曦金 */
  --color-iris-purple: #c084fc;      /* 灵境梦紫 */

  /* 按钮与发光渐变 */
  --gradient-primary: linear-gradient(135deg, #059669 0%, #0284c7 50%, #2563eb 100%);
  --gradient-primary-hover: linear-gradient(135deg, #10b981 0%, #0ea5e9 50%, #3b82f6 100%);
  --gradient-card-edge: linear-gradient(135deg, rgba(52, 211, 153, 0.3) 0%, rgba(56, 189, 248, 0.1) 50%, rgba(99, 102, 241, 0.3) 100%);

  /* 光晕与浮层阴影 */
  --shadow-glow-green: 0 0 25px -4px rgba(52, 211, 153, 0.38);
  --shadow-glow-cyan: 0 0 25px -4px rgba(56, 189, 248, 0.35);
  --shadow-card: 0 12px 35px -8px rgba(0, 0, 0, 0.65);

  --font-family-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  
  --max-width: 1140px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --transition-fast: 0.22s cubic-bezier(0.4, 0, 0.2, 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-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg-deep);
  color: var(--color-text-main);
  line-height: 1.68;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(ellipse at 15% 15%, rgba(52, 211, 153, 0.12) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 35%, rgba(56, 189, 248, 0.13) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 60%),
    linear-gradient(180deg, #080d1a 0%, #0b1325 50%, #080d1a 100%);
  background-attachment: fixed;
}

/* 背景动效画布 (轻量级流萤微粒) */
.firefly-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
}

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

a:hover {
  color: #7dd3fc;
}

a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--color-firefly-glow);
  outline-offset: 3px;
}

img, svg {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
  position: relative;
  z-index: 1;
}

/* ====================================================================
   HEADER & NAVIGATION
   ==================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(8, 13, 26, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--color-text-main);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand-logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 800;
  box-shadow: 0 0 15px rgba(52, 211, 153, 0.4);
  position: relative;
  overflow: hidden;
}

.brand-logo-icon::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: rotate(30deg);
  animation: shineSweep 4s infinite linear;
}

.header-nav {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-firefly-glow);
  box-shadow: 0 0 8px var(--color-firefly-glow);
  transition: width var(--transition-fast);
}

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

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.35rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: #ffffff !important;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(52, 211, 153, 0.4);
  box-shadow: 0 0 16px -2px rgba(52, 211, 153, 0.35);
  min-height: 44px;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.header-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px 2px rgba(52, 211, 153, 0.55);
}

.mobile-menu-btn {
  display: none;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text-main);
  align-items: center;
  justify-content: center;
}

/* ====================================================================
   BUTTONS & ANIME INTERACTIVE UI
   ==================================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #ffffff !important;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 0.9rem 2.2rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(52, 211, 153, 0.5);
  box-shadow: 0 4px 20px -2px rgba(5, 150, 105, 0.45), 0 0 15px rgba(56, 189, 248, 0.3);
  cursor: pointer;
  min-height: 50px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent);
  transform: skewX(-25deg);
  transition: none;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 28px rgba(52, 211, 153, 0.6), 0 0 22px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover::before {
  animation: shinePass 0.75s ease-in-out;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.7);
  color: var(--color-text-main) !important;
  font-size: 1.02rem;
  font-weight: 600;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  cursor: pointer;
  min-height: 50px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-secondary:hover {
  background-color: rgba(30, 41, 59, 0.85);
  border-color: var(--color-aurora-cyan);
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.25);
}

.btn-group {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(52, 211, 153, 0.15);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.35);
  border-radius: 999px;
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.2);
}

.section-title-wrap {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
  position: relative;
}

.section-tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.25rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-firefly-glow);
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.28);
  border-radius: 999px;
  margin-bottom: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
  line-height: 1.3;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}

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

/* ====================================================================
   HERO SECTION & 动漫星之使者 (Astral Sylph) 视觉
   ==================================================================== */
.hero-section {
  padding: 4.5rem 0 5rem;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.65rem;
}

.hero-badge-tag {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.4rem 1rem;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.35);
  color: #6ee7b7;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 0 14px rgba(52, 211, 153, 0.2);
}

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

.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  line-height: 1.24;
  color: #ffffff;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: #cbd5e1;
  line-height: 1.75;
}

.hero-meta-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.94rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.trust-item svg {
  color: var(--color-firefly-glow);
  flex-shrink: 0;
  filter: drop-shadow(0 0 6px rgba(52, 211, 153, 0.4));
}

/* 动漫主视觉插画容器 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.anime-sylph-wrapper {
  position: relative;
  width: 100%;
  max-width: 460px;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 极光月轮与法阵环 */
.anime-halo-ring {
  position: absolute;
  width: 90%;
  height: 90%;
  border-radius: 50%;
  border: 1px dashed rgba(56, 189, 248, 0.35);
  box-shadow: 0 0 45px rgba(52, 211, 153, 0.18), inset 0 0 35px rgba(56, 189, 248, 0.12);
  animation: rotateSlow 36s infinite linear;
}

.anime-halo-inner {
  position: absolute;
  width: 72%;
  height: 72%;
  border-radius: 50%;
  border: 1px solid rgba(52, 211, 153, 0.3);
  animation: rotateCounter 24s infinite linear;
}

.anime-sylph-svg {
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.6));
}

/* 角色发丝与衣摆微飘动画 */
.sylph-hair {
  transform-origin: 250px 180px;
  animation: sylphHairDrift 5s infinite ease-in-out;
}

.sylph-cape {
  transform-origin: 250px 240px;
  animation: sylphCloakWave 6s infinite ease-in-out;
}

.sylph-glow-orb {
  animation: orbBreathe 3s infinite ease-in-out;
}

/* 浮动网络状态浮岛卡片 */
.hero-floating-status {
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  width: 90%;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(52, 211, 153, 0.35);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.25rem;
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 20px rgba(52, 211, 153, 0.2);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.floating-status-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #ffffff;
}

.status-live-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite ease-in-out;
}

.floating-latency-pill {
  font-family: monospace;
  font-size: 0.85rem;
  color: #34d399;
  background: rgba(52, 211, 153, 0.15);
  border: 1px solid rgba(52, 211, 153, 0.3);
  padding: 0.2rem 0.65rem;
  border-radius: 6px;
}

/* ====================================================================
   MODULE SECTIONS COMMON
   ==================================================================== */
.content-section {
  padding: 5.5rem 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background-color: rgba(11, 19, 37, 0.65);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

/* ====================================================================
   1. FEATURES SECTION (4 CARDS)
   ==================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-firefly-glow), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 211, 153, 0.45);
  box-shadow: 0 16px 35px -8px rgba(0, 0, 0, 0.7), 0 0 20px rgba(52, 211, 153, 0.2);
}

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

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: var(--color-firefly-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.35rem;
  box-shadow: 0 0 15px rgba(52, 211, 153, 0.2);
  transition: transform var(--transition-fast);
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.08) rotate(3deg);
  background: rgba(52, 211, 153, 0.2);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.65rem;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ====================================================================
   2. AI SUPPORT SECTION
   ==================================================================== */
.ai-support-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.35rem;
  margin-top: 2.2rem;
}

.ai-item-card {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.35rem 1rem;
  text-align: center;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.ai-item-card:hover {
  border-color: var(--color-aurora-cyan);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.25);
}

.ai-tool-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 0.4rem;
}

.ai-tool-status {
  font-size: 0.82rem;
  color: #38bdf8;
}

/* ====================================================================
   3. PRICING SECTION (3 TIERS, MIDDLE HIGHLIGHTED)
   ==================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.45);
}

.pricing-card.is-popular {
  border: 1px solid rgba(52, 211, 153, 0.55);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(13, 27, 42, 0.9) 100%);
  box-shadow: 0 15px 45px -5px rgba(5, 150, 105, 0.3), 0 0 30px rgba(52, 211, 153, 0.2);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.is-popular:hover {
  transform: scale(1.05) translateY(-6px);
  box-shadow: 0 20px 55px rgba(5, 150, 105, 0.45), 0 0 35px rgba(52, 211, 153, 0.3);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 1.1rem;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 0 16px rgba(52, 211, 153, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.pricing-header {
  margin-bottom: 1.6rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pricing-target {
  font-size: 0.86rem;
  font-weight: 600;
  color: #34d399;
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

.pricing-name {
  font-size: 1.55rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.85rem;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: #67e8f9;
}

.price-num {
  font-size: 2.85rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
  text-shadow: 0 2px 15px rgba(52, 211, 153, 0.3);
}

.price-period {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
  margin-bottom: 2.2rem;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.94rem;
  color: #cbd5e1;
  line-height: 1.5;
}

.pricing-feature-item svg {
  color: var(--color-firefly-glow);
  flex-shrink: 0;
  margin-top: 3px;
  filter: drop-shadow(0 0 5px rgba(52, 211, 153, 0.5));
}

.pricing-card-btn {
  width: 100%;
}

/* ====================================================================
   4. BENEFITS SECTION
   ==================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.benefit-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem 2rem;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.benefit-box:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.45);
}

.benefit-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.85rem;
}

.benefit-desc {
  font-size: 0.96rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ====================================================================
   5. STREAMING MEDIA SECTION
   ==================================================================== */
.media-container-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.media-brands-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.media-brand-tag {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--color-border);
  padding: 1.15rem 0.85rem;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.media-brand-tag:hover {
  border-color: var(--color-firefly-glow);
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(52, 211, 153, 0.25);
}

.media-note {
  font-size: 0.88rem;
  color: var(--color-text-subtle);
  margin-top: 1.75rem;
  text-align: center;
}

/* ====================================================================
   6. SCENARIO CARDS SECTION (4 CARDS)
   ==================================================================== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.75rem;
}

.scenario-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.5);
}

.scenario-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
}

.scenario-device {
  font-size: 0.85rem;
  font-weight: 600;
  color: #67e8f9;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  align-self: flex-start;
}

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

/* ====================================================================
   7. FAQ ACCORDION SECTION (6 ITEMS)
   ==================================================================== */
.faq-accordion-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(56, 189, 248, 0.4);
}

.faq-item.active {
  border-color: rgba(52, 211, 153, 0.5);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5), 0 0 15px rgba(52, 211, 153, 0.15);
}

.faq-question-btn {
  width: 100%;
  padding: 1.35rem 1.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.08rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  min-height: 48px;
  gap: 1rem;
}

.faq-icon-cross {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-firefly-glow);
  transition: transform var(--transition-fast);
  filter: drop-shadow(0 0 5px rgba(52, 211, 153, 0.4));
}

.faq-item.active .faq-icon-cross {
  transform: rotate(45deg);
}

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

.faq-answer-inner {
  padding: 0 1.6rem 1.35rem;
  font-size: 0.96rem;
  color: #cbd5e1;
  line-height: 1.7;
}

/* ====================================================================
   FINAL CTA SECTION
   ==================================================================== */
.final-cta-section {
  padding: 5.5rem 0;
  background: radial-gradient(circle at 50% 50%, rgba(5, 150, 105, 0.22) 0%, rgba(8, 13, 26, 0.9) 70%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  position: relative;
}

.final-cta-wrap {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.35rem;
}

.final-cta-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
}

.final-cta-desc {
  font-size: 1.12rem;
  color: #cbd5e1;
  line-height: 1.7;
}

/* ====================================================================
   FOOTER
   ==================================================================== */
.site-footer {
  background-color: #060912;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3.5rem 0 2.2rem;
  margin-top: auto;
  position: relative;
  z-index: 1;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  list-style: none;
}

.footer-nav a {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-firefly-glow);
}

.footer-disclaimer-box {
  text-align: center;
  font-size: 0.86rem;
  color: var(--color-text-subtle);
  max-width: 750px;
  margin: 0 auto 1.6rem;
  line-height: 1.65;
}

.footer-copyright {
  text-align: center;
  font-size: 0.86rem;
  color: var(--color-text-subtle);
  padding-top: 1.35rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ====================================================================
   MOBILE BOTTOM BAR (STICKY CTA)
   ==================================================================== */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background-color: rgba(8, 13, 26, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-border);
  padding: 0.85rem 1.25rem;
  box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.4);
  transform: translateY(100%);
  transition: transform 0.25s ease-in-out;
}

.mobile-bottom-bar.visible {
  transform: translateY(0);
}

.mobile-bar-btn {
  width: 100%;
}

/* ====================================================================
   GUIDES / ARTICLES / LEGAL PAGES STYLING (ANIME THEME ENHANCED)
   ==================================================================== */
.page-header-wrap {
  padding: 4rem 0 2.5rem;
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.15) 0%, transparent 70%);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 3.5rem;
}

.breadcrumb-nav {
  font-size: 0.9rem;
  color: var(--color-text-subtle);
  margin-bottom: 1.15rem;
}

.breadcrumb-nav a {
  color: var(--color-text-muted);
}

.breadcrumb-nav a:hover {
  color: var(--color-firefly-glow);
}

.breadcrumb-nav span {
  margin: 0 0.5rem;
}

.page-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  line-height: 1.32;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.5);
}

.page-meta {
  font-size: 0.9rem;
  color: var(--color-text-subtle);
  margin-top: 0.85rem;
}

.guides-list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.2rem;
  margin-bottom: 4rem;
}

.guide-article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.guide-article-card:hover {
  border-color: rgba(56, 189, 248, 0.55);
  transform: translateY(-4px);
  box-shadow: 0 16px 35px -8px rgba(0, 0, 0, 0.7), 0 0 22px rgba(56, 189, 248, 0.2);
}

.guide-card-tag {
  align-self: flex-start;
  font-size: 0.82rem;
  font-weight: 600;
  color: #34d399;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.3);
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  margin-bottom: 0.95rem;
}

.guide-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.85rem;
  line-height: 1.42;
}

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

.guide-card-title a:hover {
  color: var(--color-aurora-cyan);
}

.guide-card-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.4rem;
  flex-grow: 1;
}

.guide-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.15rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.86rem;
  color: var(--color-text-subtle);
}

/* 文章正文排版规范 */
.article-container {
  max-width: 840px;
  margin: 0 auto 4rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.article-body {
  font-size: 1.06rem;
  line-height: 1.85;
  color: #e2e8f0;
}

.article-lead {
  font-size: 1.16rem;
  line-height: 1.8;
  color: #cbd5e1;
  background: rgba(15, 23, 42, 0.85);
  border-left: 4px solid var(--color-firefly-glow);
  padding: 1.35rem 1.6rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2.5rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin: 2.6rem 0 1.15rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #7dd3fc;
  margin: 1.85rem 0 0.85rem;
}

.article-body p {
  margin-bottom: 1.45rem;
}

.article-body ul, .article-body ol {
  margin: 0 0 1.6rem 1.6rem;
  padding: 0;
}

.article-body li {
  margin-bottom: 0.55rem;
}

.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 1.6rem 0 2.2rem;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  text-align: left;
}

.article-table th, .article-table td {
  padding: 0.9rem 1.15rem;
  border: 1px solid var(--color-border);
}

.article-table th {
  background: rgba(15, 23, 42, 0.9);
  font-weight: 700;
  color: #67e8f9;
}

.article-table tr:nth-child(even) {
  background: rgba(15, 23, 42, 0.4);
}

.article-faq-section {
  margin-top: 3.2rem;
  padding-top: 2.2rem;
  border-top: 2px dashed rgba(56, 189, 248, 0.25);
}

.article-faq-box {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.35rem;
  margin-bottom: 1.15rem;
}

.article-faq-q {
  font-weight: 700;
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 0.55rem;
}

.article-faq-a {
  font-size: 0.96rem;
  color: #cbd5e1;
  line-height: 1.68;
}

.article-cta-box {
  margin-top: 3.2rem;
  padding: 2.5rem 2rem;
  background: radial-gradient(circle at 50% 50%, rgba(5, 150, 105, 0.25) 0%, rgba(15, 23, 42, 0.9) 80%);
  border: 1px solid rgba(52, 211, 153, 0.4);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.article-cta-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.6rem;
}

.article-cta-desc {
  font-size: 0.98rem;
  color: #cbd5e1;
  margin-bottom: 1.4rem;
}

.article-internal-links {
  margin-top: 2.8rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.article-internal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.85rem;
}

.internal-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 0;
  margin: 0;
}

/* 法律合规页面排版 */
.legal-card {
  max-width: 880px;
  margin: 0 auto 4rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.legal-section {
  margin-bottom: 2.2rem;
}

.legal-section h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.95rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.legal-section p {
  font-size: 1rem;
  color: #cbd5e1;
  line-height: 1.75;
  margin-bottom: 0.95rem;
}

.legal-section ul {
  margin: 0 0 1.15rem 1.35rem;
  font-size: 0.96rem;
  color: #cbd5e1;
  line-height: 1.68;
}

/* 网站地图排版 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 2.2rem;
  margin-bottom: 4rem;
}

.sitemap-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
}

.sitemap-card h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1.15rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sitemap-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0;
}

.sitemap-list a {
  display: block;
  font-size: 0.96rem;
  color: #cbd5e1;
}

.sitemap-list a:hover {
  color: var(--color-aurora-cyan);
}

/* ====================================================================
   KEYFRAMES 动效集合 (GPU 硬件加速)
   ==================================================================== */
@keyframes rotateSlow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes rotateCounter {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(-360deg); }
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.6; }
}

@keyframes shineSweep {
  0% { transform: translateY(-100%) rotate(30deg); }
  30%, 100% { transform: translateY(120%) rotate(30deg); }
}

@keyframes shinePass {
  0% { left: -100%; }
  100% { left: 200%; }
}

@keyframes sylphHairDrift {
  0%, 100% { transform: rotate(0deg) skewX(0deg); }
  50% { transform: rotate(2deg) skewX(-1.5deg); }
}

@keyframes sylphCloakWave {
  0%, 100% { transform: rotate(0deg) scaleX(1); }
  50% { transform: rotate(-2.5deg) scaleX(1.03); }
}

@keyframes orbBreathe {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 10px rgba(52, 211, 153, 0.5)); }
  50% { transform: scale(1.12); filter: drop-shadow(0 0 22px rgba(56, 189, 248, 0.8)); }
}

/* ====================================================================
   RESPONSIVE DESIGN (移动优先与断点适配)
   ==================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .hero-visual {
    order: -1;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .pricing-card.is-popular {
    transform: none;
  }
  .pricing-card.is-popular:hover {
    transform: translateY(-4px);
  }
}

@media (max-width: 768px) {
  .site-header {
    height: 64px;
  }
  .header-container {
    height: 64px;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(8, 13, 26, 0.98);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.6);
    gap: 1.15rem;
    align-items: flex-start;
  }
  .nav-links.show {
    display: flex;
  }
  .header-cta-btn {
    display: none;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-section {
    padding: 3.2rem 0;
  }
  .content-section {
    padding: 3.8rem 0;
  }
  .mobile-bottom-bar {
    display: block;
  }
  body {
    padding-bottom: 68px;
  }
  .article-container, .legal-card, .ai-support-box, .media-container-card {
    padding: 1.75rem 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .firefly-canvas {
    display: none !important;
  }
}