/* ====================================================================
   Now加速专线机场 (nowyunjiasu.sbs) - 苍穹星轨与空境幻界 (Anime Celestial Astrolabe UI)
   全方位视觉设计系统：
   - 视觉基调：深邃苍穹星空 + 极光浮光微晕 + 晶莹轻透毛玻璃 + 苍蓝/鸢尾紫/流萤翠光韵
   - 动漫视觉元素：星轨同心罗盘、浮空星之信标、星芒璀璨标饰(✦ ✧)、次元光路拓扑
   - 动态交互特效：流星掠空、多层星轨自转、磁吸光泽CTA、鼠标光斑跟随、交互式专线测速罗盘
   - 高转化保障：高对比度视觉焦点、多状态反馈、原生触控适配、系统字体栈零依赖
   ==================================================================== */

:root {
  /* 字体栈：严格使用系统字体，杜绝高负载中文Web字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* 苍穹星空与次元背景色系 */
  --bg-deep: #060913;
  --bg-canvas: #0a0f1d;
  --bg-surface: #111827;
  --bg-surface-elevated: #162035;
  --bg-glass: rgba(14, 21, 38, 0.76);
  --bg-glass-card: rgba(17, 24, 43, 0.82);
  --bg-glass-light: rgba(255, 255, 255, 0.05);

  /* 文字层级（确保深色底下的高对比度，WCAG AAA） */
  --text-pure: #ffffff;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;

  /* 极光与星轨动漫核心主色 */
  --aurora-cyan: #38bdf8;
  --aurora-cyan-glow: rgba(56, 189, 248, 0.45);
  --aurora-blue: #2563eb;
  --aurora-indigo: #6366f1;
  --aurora-purple: #8b5cf6;
  --aurora-purple-glow: rgba(139, 92, 246, 0.45);
  --aurora-emerald: #10b981;
  --aurora-emerald-glow: rgba(16, 185, 129, 0.4);
  --aurora-amber: #fbbf24;
  --aurora-pink: #f472b6;

  /* 边框与光效 */
  --border-subtle: rgba(255, 255, 255, 0.09);
  --border-light: rgba(255, 255, 255, 0.16);
  --border-glow-cyan: rgba(56, 189, 248, 0.5);
  --border-glow-indigo: rgba(99, 102, 241, 0.5);

  /* 阴影体系 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px -8px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.25);
  --shadow-featured: 0 0 40px rgba(99, 102, 241, 0.35);

  /* 圆角与尺寸 */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --container-max: 1200px;
}

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

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-deep);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(ellipse 90% 60% at 50% -10%, rgba(99, 102, 241, 0.18) 0%, transparent 70%),
    radial-gradient(circle at 15% 30%, rgba(56, 189, 248, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 85% 65%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-canvas) 100%);
  background-attachment: fixed;
  position: relative;
}

/* 苍穹流星与星芒背景动画容器 */
.star-canvas-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.shooting-star {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, #ffffff, rgba(56, 189, 248, 0.8), transparent);
  border-radius: 999px;
  filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.8));
  animation: shootingStar 6s ease-in-out infinite;
  opacity: 0;
}

.shooting-star:nth-child(1) {
  top: 15%;
  left: 80%;
  width: 130px;
  animation-delay: 0s;
  transform: rotate(-35deg);
}

.shooting-star:nth-child(2) {
  top: 35%;
  left: 60%;
  width: 90px;
  animation-delay: 2.8s;
  transform: rotate(-30deg);
}

.shooting-star:nth-child(3) {
  top: 8%;
  left: 30%;
  width: 150px;
  animation-delay: 4.5s;
  transform: rotate(-40deg);
}

@keyframes shootingStar {
  0% { transform: translate(0, 0) rotate(-35deg); opacity: 0; }
  10% { opacity: 1; }
  25% { transform: translate(-380px, 220px) rotate(-35deg); opacity: 0; }
  100% { transform: translate(-380px, 220px) rotate(-35deg); opacity: 0; }
}

main {
  flex: 1;
  position: relative;
  z-index: 2;
}

a {
  color: var(--aurora-cyan);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: #7dd3fc;
  text-shadow: 0 0 8px rgba(56, 189, 248, 0.4);
}

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

/* 统一容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 头部导航 (Header) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 13, 25, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-pure);
  letter-spacing: -0.01em;
}

.brand-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.2) 0%, rgba(99, 102, 241, 0.25) 100%);
  color: var(--aurora-cyan);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.brand-badge::before {
  content: "✦";
  font-size: 0.65rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--aurora-cyan), var(--aurora-indigo));
  transition: all 0.25s ease;
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--text-pure);
}

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

.mobile-menu-btn {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 0.55rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-pure);
  transition: background 0.2s ease;
}

.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ====================================================================
   CTA 按钮系统 (动漫灵动光泽 + 极光脉冲)
   ==================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.85rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  line-height: 1.2;
  position: relative;
  overflow: hidden;
  user-select: none;
}

/* 主 CTA：极光渐变 + 呼吸光晕 + 掠光拂扫 */
.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, #6366f1 50%, #8b5cf6 100%);
  color: #ffffff !important;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.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(-25deg);
  transition: left 0.65s ease;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.55), 0 0 15px rgba(56, 189, 248, 0.4);
}

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

.btn-primary:active {
  transform: translateY(0) scale(0.99);
}

/* 次级按钮：星轨磨砂玻璃质感 */
.btn-secondary {
  background: var(--bg-glass-light);
  color: var(--text-pure) !important;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--aurora-cyan);
  color: var(--text-pure);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
  transform: translateY(-2px);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ====================================================================
   页面模块通用 Header 与动漫装饰标
   ==================================================================== */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3.75rem auto;
  position: relative;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--aurora-cyan);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.25rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.section-tag::before {
  content: "✦";
  font-size: 0.75rem;
  color: var(--aurora-cyan);
}

.section-tag::after {
  content: "✦";
  font-size: 0.75rem;
  color: var(--aurora-cyan);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-pure);
  line-height: 1.3;
  margin-bottom: 0.85rem;
  letter-spacing: -0.01em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

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

/* ====================================================================
   HERO 区域：苍穹星轨与次元信标 (Astrolabe Beacon)
   ==================================================================== */
.hero-section {
  padding: 5.5rem 0 5rem 0;
  position: relative;
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--aurora-cyan);
  background: rgba(14, 21, 38, 0.75);
  border: 1px solid rgba(56, 189, 248, 0.35);
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.15);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--aurora-emerald);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.25);
  animation: pulseBeacon 2s infinite ease-in-out;
}

@keyframes pulseBeacon {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

.hero-title {
  font-size: 3rem;
  font-weight: 850;
  line-height: 1.2;
  color: var(--text-pure);
  margin-bottom: 1.35rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.25rem;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.15rem;
  margin-bottom: 2.5rem;
}

.hero-trust-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-subtle);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.trust-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--aurora-cyan);
}

/* ====================================================================
   交互式「次元专线测速罗盘」 (Astrolabe Simulator Visual)
   ==================================================================== */
.hero-visual {
  position: relative;
}

.astrolabe-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg), 0 0 35px rgba(99, 102, 241, 0.2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.astrolabe-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--aurora-cyan), var(--aurora-purple), transparent);
}

/* 罗盘与星轨同心圆动画 */
.astrolabe-compass-graphic {
  position: relative;
  width: 100%;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.astrolabe-svg {
  width: 180px;
  height: 180px;
  filter: drop-shadow(0 0 15px rgba(56, 189, 248, 0.4));
}

.spin-ring-cw {
  transform-origin: center;
  animation: spinCw 36s linear infinite;
}

.spin-ring-ccw {
  transform-origin: center;
  animation: spinCcw 24s linear infinite;
}

.core-pulse {
  transform-origin: center;
  animation: corePulse 3s ease-in-out infinite;
}

@keyframes spinCw {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

@keyframes corePulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.15); opacity: 1; filter: drop-shadow(0 0 8px #38bdf8); }
}

/* 交互式线路切换器 */
.route-selector-pills {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.route-pill-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45rem 0.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.route-pill-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-pure);
}

.route-pill-btn.active {
  background: rgba(56, 189, 248, 0.18);
  border-color: var(--aurora-cyan);
  color: var(--aurora-cyan);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}

.route-status-panel {
  background: rgba(10, 15, 29, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  font-size: 0.925rem;
}

.metric-row:last-child {
  margin-bottom: 0;
}

.metric-label {
  color: var(--text-secondary);
}

.metric-value {
  font-weight: 700;
  color: var(--text-pure);
  font-family: var(--font-mono);
}

.metric-value.highlight-ping {
  color: var(--aurora-emerald);
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

/* ====================================================================
   FEATURES 模块 (4 张次元特性卡)
   ==================================================================== */
.features-section {
  padding: 5.5rem 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.75rem;
}

.feature-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

/* 动漫直角折光微标 */
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, transparent 50%, rgba(56, 189, 248, 0.25) 50%);
  border-top-right-radius: var(--radius-md);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow-cyan);
  box-shadow: var(--shadow-md), 0 0 25px rgba(56, 189, 248, 0.25);
  background: rgba(22, 32, 53, 0.88);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(99, 102, 241, 0.2) 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--aurora-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.35rem;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 0.75rem;
}

.feature-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ====================================================================
   BENEFITS 核心优势与专线技术
   ==================================================================== */
.benefits-section {
  padding: 5.5rem 0;
  background: rgba(10, 15, 29, 0.5);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.benefit-card {
  display: flex;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.benefit-card:hover {
  border-color: var(--border-glow-indigo);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.2);
}

.benefit-num {
  font-size: 1.75rem;
  font-weight: 850;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--aurora-cyan), var(--aurora-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  flex-shrink: 0;
}

.benefit-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 0.55rem;
}

.benefit-content p {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ====================================================================
   SCENARIOS 使用场景卡 (4 cards)
   ==================================================================== */
.scenarios-section {
  padding: 5.5rem 0;
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.75rem;
}

.scenario-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(10px);
  position: relative;
}

.scenario-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow-cyan);
  box-shadow: var(--shadow-md), 0 0 25px rgba(56, 189, 248, 0.2);
}

.scenario-header {
  margin-bottom: 1.15rem;
}

.scenario-target {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--aurora-cyan);
  margin-bottom: 0.4rem;
  letter-spacing: 0.03em;
  display: inline-block;
}

.scenario-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
}

.scenario-device {
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.scenario-device svg {
  color: var(--aurora-cyan);
}

.scenario-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: auto;
}

/* ====================================================================
   PRICING 套餐定价卡 (3 tiers, 推荐中档视觉突出)
   ==================================================================== */
.pricing-section {
  padding: 5.5rem 0;
  background: rgba(10, 15, 29, 0.6);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(12px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

/* 推荐中档位：极光流光边框 + 强视觉聚光灯 */
.pricing-card.featured {
  border-color: rgba(99, 102, 241, 0.7);
  box-shadow: var(--shadow-featured);
  background: linear-gradient(180deg, rgba(22, 32, 58, 0.95) 0%, rgba(14, 21, 38, 0.9) 100%);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 0 50px rgba(99, 102, 241, 0.5), 0 0 25px rgba(56, 189, 248, 0.3);
}

.featured-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #2563eb, #8b5cf6);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 1.1rem;
  border-radius: var(--radius-full);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.6);
  white-space: nowrap;
  letter-spacing: 0.04em;
}

.pricing-tier-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 0.35rem;
}

.pricing-tier-target {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--aurora-cyan);
}

.pricing-amount {
  font-size: 3.25rem;
  font-weight: 900;
  color: var(--text-pure);
  line-height: 1;
  font-family: var(--font-mono);
}

.pricing-cycle {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin-bottom: 2.25rem;
  flex: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.925rem;
  color: var(--text-secondary);
  margin-bottom: 0.95rem;
}

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

.pricing-card.featured .pricing-feature-icon {
  color: #818cf8;
}

/* ====================================================================
   PLATFORMS (流媒体支持与AI支持)
   ==================================================================== */
.platforms-section {
  padding: 5.5rem 0;
}

.platforms-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.platform-block {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2.5rem 2.25rem;
  backdrop-filter: blur(12px);
  position: relative;
  transition: all 0.3s ease;
}

.platform-block:hover {
  border-color: var(--border-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.platform-block h3 {
  font-size: 1.4rem;
  font-weight: 750;
  color: var(--text-pure);
  margin-bottom: 0.85rem;
}

.platform-block p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.platform-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.platform-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.15rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-pure);
  transition: all 0.2s ease;
}

.platform-tag:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--aurora-cyan);
  transform: translateY(-2px);
  color: var(--aurora-cyan);
}

/* ====================================================================
   FAQ 模块 (手风琴交互与高可用)
   ==================================================================== */
.faq-section {
  padding: 5.5rem 0;
  background: rgba(10, 15, 29, 0.5);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 1.15rem;
  overflow: hidden;
  background: var(--bg-glass-card);
  transition: all 0.2s ease;
}

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

.faq-item.active {
  border-color: var(--border-glow-cyan);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.35rem 1.75rem;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 650;
  color: var(--text-pure);
  text-align: left;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.faq-question-btn:hover {
  background: rgba(255, 255, 255, 0.03);
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--text-muted);
}

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

.faq-answer {
  display: none;
  padding: 0 1.75rem 1.5rem 1.75rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--border-subtle);
  margin-top: 0.25rem;
  padding-top: 1.15rem;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ====================================================================
   FINAL CTA 区域
   ==================================================================== */
.final-cta-section {
  padding: 6rem 0;
  position: relative;
  text-align: center;
}

.final-cta-box {
  max-width: 800px;
  margin: 0 auto;
  background: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.25) 0%, transparent 75%), var(--bg-glass-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(56, 189, 248, 0.15);
  backdrop-filter: blur(14px);
  position: relative;
}

.final-cta-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--aurora-cyan), var(--aurora-purple), transparent);
}

.final-cta-title {
  font-size: 2.5rem;
  font-weight: 850;
  color: var(--text-pure);
  margin-bottom: 1.15rem;
  line-height: 1.3;
}

.final-cta-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
  line-height: 1.65;
}

/* ====================================================================
   FOOTER 页脚
   ==================================================================== */
.site-footer {
  background: #04070d;
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2.5rem 0;
  position: relative;
  z-index: 2;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding-bottom: 2.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-brand {
  max-width: 380px;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.65rem;
  line-height: 1.6;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem;
}

.footer-link {
  font-size: 0.925rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  padding-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-disclosure {
  line-height: 1.6;
}

.footer-copyright {
  color: var(--text-dim);
}

/* ====================================================================
   移动端吸底 CTA
   ==================================================================== */
.sticky-bottom-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(9, 13, 25, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.85rem 1.5rem;
  z-index: 99;
  display: none;
  box-shadow: 0 -8px 25px rgba(0, 0, 0, 0.5);
}

.sticky-cta-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 520px;
  margin: 0 auto;
}

.sticky-cta-text {
  font-size: 0.925rem;
  font-weight: 700;
  color: var(--text-pure);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.sticky-cta-text::before {
  content: "✦";
  color: var(--aurora-cyan);
}

/* ====================================================================
   内页、教程文章与法律合规页排版
   ==================================================================== */
.page-header {
  padding: 4rem 0 2.5rem 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  border-bottom: 1px solid var(--border-subtle);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.breadcrumb-sep {
  color: var(--border-light);
}

.page-title {
  font-size: 2.35rem;
  font-weight: 850;
  line-height: 1.3;
  color: var(--text-pure);
  margin-bottom: 0.85rem;
}

.page-meta {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-layout {
  padding: 4rem 0 6rem 0;
}

.article-content {
  max-width: 840px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-lead {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--text-pure);
  background: rgba(14, 21, 38, 0.7);
  border-left: 4px solid var(--aurora-cyan);
  padding: 1.35rem 1.75rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2.75rem;
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 750;
  color: var(--text-pure);
  margin: 2.75rem 0 1.15rem 0;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-subtle);
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-pure);
  margin: 2rem 0 0.85rem 0;
}

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

.article-content ul, .article-content ol {
  margin: 1.2rem 0 1.75rem 2rem;
}

.article-content li {
  margin-bottom: 0.65rem;
}

.article-faq-box {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin: 3rem 0;
}

.article-faq-item {
  margin-bottom: 1.5rem;
}

.article-faq-item:last-child {
  margin-bottom: 0;
}

.article-faq-item h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 0.45rem;
}

.article-faq-item p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0;
}

.article-cta-box {
  background: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.25) 0%, transparent 80%), var(--bg-glass-card);
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  text-align: center;
  margin: 3.5rem 0 2rem 0;
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.15);
}

.article-cta-box h3 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 0.85rem;
}

.article-cta-box p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.article-links-box {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2.25rem;
  margin-top: 3.25rem;
}

.article-links-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 1.15rem;
}

.article-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  list-style: none;
}

.article-links-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--aurora-cyan);
}

.article-links-list a::before {
  content: "→";
  color: var(--text-muted);
}

/* ====================================================================
   GUIDES 页面卡片 (zhinan.html)
   ==================================================================== */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 4rem 0 5.5rem 0;
}

.guide-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(10px);
}

.guide-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow-cyan);
  box-shadow: var(--shadow-md), 0 0 25px rgba(56, 189, 248, 0.2);
}

.guide-thumb {
  background: rgba(10, 15, 29, 0.85);
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.guide-thumb svg {
  filter: drop-shadow(0 0 12px rgba(56, 189, 248, 0.4));
  transition: transform 0.35s ease;
}

.guide-card:hover .guide-thumb svg {
  transform: scale(1.1);
}

.guide-body {
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.guide-meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.guide-card-title {
  font-size: 1.25rem;
  font-weight: 750;
  line-height: 1.4;
  color: var(--text-pure);
  margin-bottom: 0.85rem;
}

.guide-card-title a {
  color: var(--text-pure);
}

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

.guide-excerpt {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.65rem;
  flex: 1;
}

.guide-read-btn {
  font-size: 0.925rem;
  font-weight: 700;
  color: var(--aurora-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.guide-read-btn:hover {
  color: #7dd3fc;
}

/* ====================================================================
   SITEMAP 页面 (sitemap.html)
   ==================================================================== */
.sitemap-section {
  padding: 4rem 0 5.5rem 0;
}

.sitemap-group {
  margin-bottom: 3rem;
}

.sitemap-group h2 {
  font-size: 1.45rem;
  font-weight: 750;
  color: var(--text-pure);
  margin-bottom: 1.25rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-subtle);
}

.sitemap-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.35rem;
  list-style: none;
}

.sitemap-item {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.45rem;
  transition: all 0.2s ease;
}

.sitemap-item:hover {
  border-color: var(--border-glow-cyan);
  transform: translateY(-2px);
}

.sitemap-item a {
  font-weight: 700;
  font-size: 1.1rem;
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text-pure);
}

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

.sitemap-item p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ====================================================================
   响应式断点 (移动优先与平板桌面布局)
   ==================================================================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .hero-trust-facts {
    grid-template-columns: 1fr;
  }
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  .platforms-container {
    grid-template-columns: 1fr;
  }
  .guides-grid {
    grid-template-columns: 1fr;
  }
  .sitemap-list {
    grid-template-columns: 1fr;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .main-nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: rgba(9, 13, 25, 0.98);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.15rem;
    box-shadow: var(--shadow-lg);
  }
  
  .main-nav.is-open {
    display: flex;
  }
  
  .sticky-bottom-cta {
    display: block;
  }

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

/* ====================================================================
   无障碍：支持 prefers-reduced-motion
   ==================================================================== */
@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;
  }
  .shooting-star, .spin-ring-cw, .spin-ring-ccw, .core-pulse, .pulse-dot {
    animation: none !important;
  }
}