/* ====================================================================
   Nice加速 - 星穹幻境 · 动漫幻想视觉规范 (Astral Anime UI)
   ==================================================================== */

:root {
  --bg-deep: #070a13;
  --bg-card: rgba(13, 20, 36, 0.78);
  --bg-card-hover: rgba(20, 30, 55, 0.88);
  --bg-elevated: #0f172a;
  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-glow: rgba(139, 92, 246, 0.45);
  --border-cyan: rgba(6, 182, 212, 0.5);
  --border-sakura: rgba(236, 72, 153, 0.5);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-secondary: #cbd5e1;
  
  --astral-cyan: #06b6d4;
  --astral-purple: #8b5cf6;
  --astral-sakura: #ec4899;
  --astral-blue: #3b82f6;
  --astral-gold: #fbbf24;
  
  --grad-astral: linear-gradient(135deg, #2563eb 0%, #7c3aed 52%, #ec4899 100%);
  --grad-cyan-blue: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --grad-card: linear-gradient(180deg, rgba(23, 37, 65, 0.45) 0%, rgba(13, 20, 36, 0.8) 100%);
  
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --container-width: 1140px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
  color: var(--text-main);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg-deep) radial-gradient(circle at 50% 0%, #1e1b4b 0%, #070a13 70%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* 宇宙星尘与漂浮樱花微粒背景 */
.anime-particles-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.sakura-petal {
  position: absolute;
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.75) 0%, rgba(251, 113, 133, 0.3) 100%);
  border-radius: 12px 1px 12px 1px;
  filter: drop-shadow(0 0 6px rgba(236, 72, 153, 0.5));
  opacity: 0.6;
  animation: sakuraFall linear infinite;
}

.petal-1 { width: 12px; height: 16px; left: 10%; top: -20px; animation-duration: 14s; animation-delay: 0s; }
.petal-2 { width: 10px; height: 14px; left: 28%; top: -20px; animation-duration: 18s; animation-delay: 3s; }
.petal-3 { width: 14px; height: 18px; left: 52%; top: -20px; animation-duration: 16s; animation-delay: 1.5s; }
.petal-4 { width: 9px; height: 12px; left: 74%; top: -20px; animation-duration: 21s; animation-delay: 5s; }
.petal-5 { width: 11px; height: 15px; left: 88%; top: -20px; animation-duration: 15s; animation-delay: 2s; }

@keyframes sakuraFall {
  0% {
    transform: translate3d(0, -10px, 0) rotate(0deg);
    opacity: 0;
  }
  15% { opacity: 0.7; }
  85% { opacity: 0.7; }
  100% {
    transform: translate3d(120px, 105vh, 0) rotate(420deg);
    opacity: 0;
  }
}

/* 链接与无障碍聚焦 */
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--astral-cyan);
  outline-offset: 3px;
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 2;
}

/* 顶部导航栏 (二次元战舰HUD视效) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 10, 19, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--astral-cyan), var(--astral-purple), transparent);
  opacity: 0.6;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  min-height: 44px;
}

.brand-logo-txt {
  display: flex;
  flex-direction: column;
}

.brand-name {
  background: linear-gradient(135deg, #ffffff 30%, var(--astral-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--astral-purple);
  text-transform: uppercase;
}

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

.nav-link {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--astral-cyan);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 8px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--astral-cyan);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
}

.nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  min-height: 44px;
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--grad-astral);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 16px rgba(124, 58, 237, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(236, 72, 153, 0.6);
}

.menu-toggle {
  display: none;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  color: var(--text-main);
}

/* 通用二次元 CTA 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  font-size: 1.02rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--grad-astral);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 22px rgba(124, 58, 237, 0.45);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent 30%, rgba(255, 255, 255, 0.3) 50%, transparent 70%);
  transform: rotate(25deg) translateY(-100%);
  transition: transform 0.6s ease;
}

.btn-primary:hover::before {
  transform: rotate(25deg) translateY(100%);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(236, 72, 153, 0.6);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 2px 14px rgba(124, 58, 237, 0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-main);
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--astral-cyan);
  background: rgba(30, 41, 59, 0.9);
  transform: translateY(-2px);
  color: var(--astral-cyan);
}

/* 区块基础 */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

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

.section-pill {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--astral-cyan);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.35);
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

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

/* ====================================================================
   Hero 主视觉区 (动漫双栏: 文案区 + 次元加速控制台)
   ==================================================================== */
.hero-section {
  padding: 80px 0 68px;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

/* 星云漫射背景 */
.hero-section::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.25) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(40px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--astral-sakura);
  background: rgba(236, 72, 153, 0.1);
  border: 1px solid var(--border-sakura);
  padding: 5px 16px;
  border-radius: 9999px;
  margin-bottom: 22px;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title-accent {
  background: var(--grad-astral);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
}

.metric-item {
  position: relative;
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.metric-value-cyan { color: var(--astral-cyan); }
.metric-value-sakura { color: var(--astral-sakura); }
.metric-value-gold { color: var(--astral-gold); }

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

/* 右侧：次元星轨加速终端 HUD 卡片 (交互式) */
.hero-visual {
  position: relative;
}

.anime-console-card {
  background: var(--bg-card);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-lg);
  padding: 26px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(124, 58, 237, 0.15);
  position: relative;
  overflow: hidden;
}

.anime-console-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-astral);
}

/* 背景旋转魔法阵 SVG 装饰 */
.astral-sigil-bg {
  position: absolute;
  top: -40px;
  right: -40px;
  width: 220px;
  height: 220px;
  pointer-events: none;
  opacity: 0.15;
  animation: sigilRotate 30s linear infinite;
}

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

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.console-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--text-main);
}

.console-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--astral-cyan);
  box-shadow: 0 0 8px var(--astral-cyan);
  animation: statusPulse 2s infinite ease-in-out;
}

@keyframes statusPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.2); }
}

.console-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background: rgba(6, 182, 212, 0.15);
  color: var(--astral-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

/* 调频切换区块 */
.console-mode-box {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.mode-info-title {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.mode-info-val {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--astral-sakura);
}

.console-toggle-btn {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.4), rgba(236, 72, 153, 0.4));
  border: 1px solid var(--border-sakura);
  color: #ffffff;
  padding: 8px 14px;
  border-radius: var(--radius-xs);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.console-toggle-btn:hover {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.8), rgba(236, 72, 153, 0.8));
  box-shadow: 0 0 14px rgba(236, 72, 153, 0.5);
}

.console-metrics-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.console-metric-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  padding: 8px 12px;
  background: rgba(7, 10, 19, 0.5);
  border-radius: var(--radius-xs);
  border: 1px solid rgba(148, 163, 184, 0.08);
}

.console-metric-lbl { color: var(--text-muted); }
.console-metric-val {
  font-weight: 700;
  color: var(--astral-cyan);
  font-variant-numeric: tabular-nums;
}

.console-link-wrap {
  text-align: center;
  padding-top: 6px;
}

.console-money-cta {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--astral-sakura);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

.console-money-cta:hover {
  color: #ffffff;
  text-shadow: 0 0 10px var(--astral-sakura);
}

/* ====================================================================
   特性卡片 (Features)
   ==================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(6, 182, 212, 0.15);
}

.feature-icon-box {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--astral-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

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

/* ====================================================================
   流媒体支持 (Streaming)
   ==================================================================== */
.support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.support-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.support-item:hover {
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-3px);
}

.support-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.support-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: #ffffff;
}

.support-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 9999px;
  background: rgba(139, 92, 246, 0.18);
  color: var(--astral-purple);
  border: 1px solid rgba(139, 92, 246, 0.35);
}

.support-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ====================================================================
   使用场景卡 (Usage Scenarios)
   ==================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: rgba(236, 72, 153, 0.45);
}

.scenario-badge {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--astral-sakura);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

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

.scenario-device {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--astral-cyan);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-xs);
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 16px;
}

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

/* ====================================================================
   定价卡片 (Pricing) - 二次元强化版
   ==================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 34px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  border: 1px solid rgba(236, 72, 153, 0.55);
  background: linear-gradient(180deg, rgba(49, 46, 129, 0.4) 0%, rgba(13, 20, 36, 0.9) 100%);
  box-shadow: 0 10px 36px rgba(124, 58, 237, 0.2), 0 0 24px rgba(236, 72, 153, 0.15);
}

.pricing-featured-tag {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-astral);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 18px;
  border-radius: 9999px;
  letter-spacing: 0.08em;
  box-shadow: 0 2px 10px rgba(236, 72, 153, 0.5);
}

.pricing-target {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--astral-cyan);
  margin-bottom: 8px;
}

.pricing-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-currency {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--astral-sakura);
}

.pricing-amount {
  font-size: 2.4rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  margin-left: 3px;
  font-variant-numeric: tabular-nums;
}

.pricing-period {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-left: 6px;
}

.pricing-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 22px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px dashed rgba(148, 163, 184, 0.12);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li svg {
  flex-shrink: 0;
  color: var(--astral-cyan);
}

.pricing-btn {
  width: 100%;
}

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

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.active {
  border-color: rgba(6, 182, 212, 0.45);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  min-height: 48px;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--astral-cyan);
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--astral-cyan);
  transition: transform 0.25s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s ease-out;
  background: rgba(7, 10, 19, 0.4);
}

.faq-item.active .faq-answer {
  max-height: 350px;
}

.faq-answer-inner {
  padding: 0 22px 20px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding-top: 16px;
}

/* ====================================================================
   Final CTA 区块
   ==================================================================== */
.final-cta-section {
  padding: 88px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(30, 27, 75, 0.35) 100%);
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.final-cta-inner {
  max-width: 660px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.3;
}

.final-cta-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ====================================================================
   移动端吸底 CTA 栏 (动漫霓虹流光)
   ==================================================================== */
.mobile-bottom-bar {
  display: none;
}

@media (max-width: 768px) {
  .mobile-bottom-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 99;
    background: rgba(13, 20, 36, 0.95);
    border-top: 1px solid rgba(139, 92, 246, 0.4);
    padding: 10px 16px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5), 0 0 16px rgba(124, 58, 237, 0.2);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transform: translateY(100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.28s ease, opacity 0.28s ease;
  }

  .mobile-bottom-bar.visible {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-bottom-text {
    font-size: 0.9rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.3;
  }

  .mobile-bottom-text span {
    display: block;
    font-size: 0.74rem;
    font-weight: normal;
    color: var(--astral-cyan);
  }

  .mobile-bottom-btn {
    padding: 8px 18px;
    font-size: 0.92rem;
    min-height: 44px;
    white-space: nowrap;
  }
}

/* ====================================================================
   页脚 (Footer)
   ==================================================================== */
.site-footer {
  margin-top: auto;
  background: #050810;
  border-top: 1px solid var(--border-subtle);
  padding: 52px 0 36px;
  position: relative;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.15rem;
  font-weight: 800;
  color: #ffffff;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-nav a {
  font-size: 0.92rem;
  color: var(--text-muted);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--astral-cyan);
}

.footer-disclosure {
  font-size: 0.86rem;
  color: var(--astral-cyan);
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.2);
  padding: 10px 16px;
  border-radius: var(--radius-xs);
  margin-bottom: 16px;
}

.footer-disclaimer {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ====================================================================
   文章与合规内页样式
   ==================================================================== */
.breadcrumb-nav {
  margin-bottom: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.breadcrumb-nav a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: rgba(148, 163, 184, 0.3);
}

.page-container {
  padding: 56px 0 80px;
  flex-grow: 1;
}

.article-header {
  margin-bottom: 34px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-title {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.35;
  color: #ffffff;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-lead {
  background: rgba(124, 58, 237, 0.1);
  border-left: 4px solid var(--astral-purple);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
}

.article-body {
  font-size: 1.04rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: #ffffff;
  margin-top: 44px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-body h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--astral-cyan);
  margin-top: 26px;
  margin-bottom: 14px;
}

.article-body p { margin-bottom: 20px; }
.article-body ul, .article-body ol { margin-bottom: 22px; padding-left: 24px; }
.article-body li { margin-bottom: 10px; }

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

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

.article-faq {
  margin-top: 40px;
  padding: 26px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.article-faq h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-top: 18px;
  margin-bottom: 8px;
  color: #ffffff;
}

.article-faq h3:first-child { margin-top: 0; }
.article-faq p { font-size: 0.96rem; color: var(--text-secondary); margin-bottom: 12px; }

.article-cta-box {
  margin-top: 50px;
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.article-cta-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.article-cta-text {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.article-related {
  margin-top: 48px;
  padding-top: 30px;
  border-top: 1px solid var(--border-subtle);
}

.article-related h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
}

.article-related ul { list-style: none; padding: 0; }
.article-related li { padding: 10px 0; border-bottom: 1px dashed rgba(148, 163, 184, 0.12); }
.article-related a { font-size: 0.98rem; color: var(--astral-cyan); }
.article-related a:hover { color: #ffffff; }

/* 指南归档列表 */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.guide-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.45);
}

.guide-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.guide-title {
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1.4;
  color: #ffffff;
  margin-bottom: 12px;
}

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

.guide-summary {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.guide-link {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--astral-cyan);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
}

.guide-link:hover { text-decoration: underline; color: #ffffff; }

/* 法律合规卡片 */
.legal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 40px;
  max-width: 880px;
  margin: 0 auto;
}

.legal-header {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.legal-title {
  font-size: 2.1rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 12px;
}

.legal-date {
  font-size: 0.88rem;
  color: var(--astral-cyan);
}

.legal-section { margin-bottom: 30px; }
.legal-section h2 { font-size: 1.35rem; font-weight: 800; color: #ffffff; margin-bottom: 14px; }
.legal-section p { font-size: 0.98rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 14px; }
.legal-section ul { padding-left: 20px; margin-bottom: 14px; }
.legal-section li { font-size: 0.98rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 8px; }

/* 网站地图 */
.sitemap-group { margin-bottom: 36px; }
.sitemap-group h2 { font-size: 1.3rem; font-weight: 800; color: #ffffff; margin-bottom: 18px; padding-bottom: 10px; border-bottom: 1px solid var(--border-subtle); }
.sitemap-list { list-style: none; padding: 0; display: grid; gap: 14px; }
.sitemap-item { background: rgba(15, 23, 42, 0.6); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); padding: 16px 20px; }
.sitemap-item a { font-size: 1.05rem; font-weight: 700; color: var(--astral-cyan); display: flex; align-items: center; min-height: 44px; margin-bottom: 4px; }
.sitemap-item a:hover { color: #ffffff; }
.sitemap-item p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

/* ====================================================================
   响应式断点
   ==================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .hero-content {
    max-width: 100%;
    text-align: center;
  }
  
  .hero-cta-group {
    justify-content: center;
  }
  
  .hero-metrics {
    text-align: center;
  }
  
  .feature-grid, .support-grid, .scenarios-grid, .pricing-grid, .guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section { padding: 52px 0; }
  .hero-section { padding: 52px 0 44px; }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1.02rem; }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  
  .hero-cta-group .btn-primary, .hero-cta-group .btn-secondary {
    width: 100%;
  }
  
  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .feature-grid, .support-grid, .scenarios-grid, .pricing-grid, .guide-grid {
    grid-template-columns: 1fr;
  }
  
  .main-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(7, 10, 19, 0.97);
    border-bottom: 1px solid var(--border-glow);
    flex-direction: column;
    padding: 24px;
    gap: 14px;
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.7);
  }
  
  .main-nav.active { display: flex; }
  .menu-toggle { display: block; }
  
  .footer-top { flex-direction: column; align-items: flex-start; }
  .footer-nav { flex-direction: column; gap: 8px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .legal-card { padding: 24px; }
  body { padding-bottom: 64px; }
}

/* 动效减弱模式兼容 */
@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;
  }
  .sakura-petal { display: none !important; }
  .astral-sigil-bg { animation: none !important; }
}