/* ====================================================================
   FSCloud — 视觉设计规范 (style.css)
   设计风格：星轨空境 · 动漫幻想 (Astral Anime Fantasy)
   纯 CSS / 矢量 SVG / 无外部字体 / 零外部CDN / GPU 硬件加速
   ==================================================================== */

:root {
  /* 动漫幻想调色盘：深邃星空夜暮底色 + 幻紫星轨 + 极光青 + 绯樱流光 */
  --bg-deep: #090c15;
  --bg-surface: #0f1424;
  --bg-card: rgba(18, 24, 44, 0.72);
  --bg-card-hover: rgba(28, 38, 70, 0.82);
  --bg-card-glow: rgba(99, 102, 241, 0.12);
  
  --text-main: #f1f5f9;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  --text-highlight: #e0e7ff;

  --accent-astral: #6366f1;       /* 星轨幻紫 */
  --accent-cyan: #06b6d4;         /* 灵晶青蓝 */
  --accent-sakura: #f43f5e;       /* 灵樱绯红 */
  --accent-gold: #fbbf24;         /* 星辉鎏金 */
  --accent-blue: #3b82f6;         /* 蔚蓝法阵 */
  
  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-glow: rgba(99, 102, 241, 0.45);
  --border-sakura: rgba(244, 63, 94, 0.4);
  --border-cyan: rgba(6, 182, 212, 0.4);

  --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, "Liberation Mono", "Courier New", monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --container-max: 1160px;
  --nav-height: 70px;
  --transition-smooth: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.18s ease;
}

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 30%, rgba(244, 63, 94, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.09) 0%, transparent 60%);
  background-attachment: fixed;
  color: var(--text-main);
  font-size: 16px;
  overflow-x: hidden;
  position: relative;
}

/* 背景动态粒子层（星屑与微光） */
.ambient-scene-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-star {
  position: absolute;
  background: #ffffff;
  border-radius: 50%;
  opacity: 0.5;
  animation: starTwinkle 4s ease-in-out infinite alternate;
}

@keyframes starTwinkle {
  0% { opacity: 0.2; transform: scale(0.8); }
  100% { opacity: 0.85; transform: scale(1.3); }
}

/* 流星轨迹动画 */
.meteor-streak {
  position: absolute;
  top: -60px;
  height: 2px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.95), rgba(6, 182, 212, 0.8), transparent);
  border-radius: 999px;
  filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.8));
  opacity: 0;
  transform: rotate(-35deg);
  animation: meteorFall 9s cubic-bezier(0.25, 0.1, 0.25, 1) infinite;
}

.meteor-streak:nth-child(1) { left: 20%; width: 140px; animation-delay: 1.2s; }
.meteor-streak:nth-child(2) { left: 65%; width: 180px; animation-delay: 4.8s; }
.meteor-streak:nth-child(3) { left: 45%; width: 120px; animation-delay: 7.5s; }

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

/* 漂浮樱花瓣动画 */
.sakura-petal {
  position: absolute;
  background: radial-gradient(circle at 35% 35%, #fbcfe8, #f43f5e 80%);
  border-radius: 14px 2px 14px 2px;
  opacity: 0.7;
  filter: drop-shadow(0 0 4px rgba(244, 63, 94, 0.4));
  pointer-events: none;
  animation: sakuraDrift 16s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes sakuraDrift {
  0% { transform: translate(0, -50px) rotate(0deg) scale(0.8); opacity: 0; }
  15% { opacity: 0.8; }
  85% { opacity: 0.8; }
  100% { transform: translate(-220px, 105vh) rotate(540deg) scale(1.1); opacity: 0; }
}

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

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

a:hover {
  color: #38bdf8;
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.5));
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding-top: 88px;
  padding-bottom: 88px;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: linear-gradient(180deg, rgba(15, 20, 36, 0.6) 0%, rgba(13, 17, 32, 0.85) 100%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 56px;
  position: relative;
}

/* 动漫徽章灵感小标 */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: #a5b4fc;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.15);
}

.section-badge-dot {
  width: 6px;
  height: 6px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.5); opacity: 1; }
}

.section-title {
  font-size: 2.15rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.32;
  margin-bottom: 14px;
  letter-spacing: -0.015em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-sub);
  line-height: 1.68;
}

/* ====================================================================
   CTA 按钮体系（呼吸光效 + 晶体扫光 + 按压反馈 + 粒子爆发）
   ==================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 48px;
  padding: 12px 28px;
  font-size: 15.5px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

/* 主 CTA：动漫星空法阵渐变能量键 */
.btn-primary {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #db2777 100%);
  background-size: 200% 200%;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 0 24px rgba(124, 58, 237, 0.45), 0 4px 12px rgba(0, 0, 0, 0.4);
  animation: auraGlow 5s ease infinite alternate;
}

@keyframes auraGlow {
  0% { background-position: 0% 50%; box-shadow: 0 0 20px rgba(79, 70, 229, 0.45); }
  50% { background-position: 100% 50%; box-shadow: 0 0 32px rgba(219, 39, 119, 0.55); }
  100% { background-position: 0% 50%; box-shadow: 0 0 20px rgba(124, 58, 237, 0.45); }
}

/* 光泽划过效果（Shimmer Sweep） */
.btn-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: rotate(30deg);
  pointer-events: none;
  animation: shimmerSweep 4.5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes shimmerSweep {
  0% { transform: translateX(0) rotate(30deg); }
  35% { transform: translateX(450%) rotate(30deg); }
  100% { transform: translateX(450%) rotate(30deg); }
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 36px rgba(219, 39, 119, 0.65), 0 8px 20px rgba(0, 0, 0, 0.5);
  border-color: rgba(255, 255, 255, 0.5);
  color: #ffffff;
}

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

/* 次级按钮：半透明晶体暗影键 */
.btn-secondary {
  background: rgba(30, 41, 69, 0.65);
  color: #e2e8f0;
  border: 1px solid rgba(148, 163, 184, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(45, 59, 97, 0.85);
  border-color: rgba(99, 102, 241, 0.55);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.25);
}

.btn-block {
  width: 100%;
}

/* 点击波纹特效 */
.click-ripple {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.75) 0%, transparent 70%);
  transform: scale(0);
  animation: rippleExpand 0.6s cubic-bezier(0, 0, 0.2, 1);
  pointer-events: none;
}

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

/* ====================================================================
   头部导航（动漫风格霓虹晶化玻璃导航栏）
   ==================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 12, 21, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  height: var(--nav-height);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.28rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
  text-shadow: 0 0 16px rgba(99, 102, 241, 0.5);
}

.brand-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.6));
}

.nav-menu {
  display: none;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: var(--text-sub);
  font-size: 15px;
  font-weight: 600;
  padding: 8px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-astral));
  border-radius: 999px;
  transition: width var(--transition-smooth), left var(--transition-smooth);
}

.nav-link:hover, .nav-link:focus {
  color: #ffffff;
}

.nav-link:hover::after, .nav-link:focus::after {
  width: 100%;
  left: 0;
}

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

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(30, 41, 69, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: #ffffff;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.menu-toggle:hover {
  background: rgba(45, 59, 97, 0.8);
  border-color: var(--accent-astral);
}

/* 移动端菜单抽屉 */
.mobile-nav-panel {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(13, 17, 32, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glow);
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  z-index: 99;
}

.mobile-nav-panel.is-open {
  display: block;
  animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-menu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.mobile-menu-item a {
  display: block;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 600;
  color: #e2e8f0;
  border-radius: var(--radius-sm);
  background: rgba(30, 41, 69, 0.3);
  border: 1px solid transparent;
}

.mobile-menu-item a:hover {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent-astral);
  color: #ffffff;
}

/* ====================================================================
   HERO 动漫主视觉区块（星轨天象仪 + 幻境破空）
   ==================================================================== */
.hero-section {
  padding-top: 64px;
  padding-bottom: 96px;
  position: relative;
  overflow: hidden;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.hero-text {
  text-align: left;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.35);
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 700;
  color: #fda4af;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
  box-shadow: 0 0 20px rgba(244, 63, 94, 0.15);
}

.hero-tagline svg {
  color: var(--accent-sakura);
  animation: pulseRotate 4s ease-in-out infinite;
}

@keyframes pulseRotate {
  0% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.25) rotate(180deg); }
  100% { transform: scale(1) rotate(360deg); }
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.025em;
  color: #ffffff;
  margin-bottom: 20px;
  text-shadow: 0 4px 24px rgba(99, 102, 241, 0.35);
}

.hero-title-highlight {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 16px rgba(129, 140, 248, 0.4));
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 600px;
}

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

.hero-trust-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid rgba(148, 163, 184, 0.15);
  font-size: 13.5px;
  color: var(--text-muted);
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #cbd5e1;
  font-weight: 500;
}

.trust-item svg {
  width: 17px;
  height: 17px;
  color: var(--accent-cyan);
  filter: drop-shadow(0 0 6px var(--accent-cyan));
}

/* HERO 右侧核心视觉：动漫旋转星盘法阵 + 状态晶柱 */
.hero-visual-card {
  position: relative;
  background: radial-gradient(circle at 50% 50%, rgba(30, 41, 69, 0.5) 0%, rgba(15, 20, 36, 0.85) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: 0 0 50px rgba(99, 102, 241, 0.22), inset 0 0 30px rgba(99, 102, 241, 0.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* 漂浮发光星轨罗盘 (Astral Magic Array SVG) */
.astral-compass-wrap {
  position: relative;
  width: 100%;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.astral-ring-outer {
  position: absolute;
  width: 170px;
  height: 170px;
  border: 1.5px dashed rgba(6, 182, 212, 0.45);
  border-radius: 50%;
  animation: spinSlow 36s linear infinite;
}

.astral-ring-inner {
  position: absolute;
  width: 120px;
  height: 120px;
  border: 1.5px solid rgba(168, 85, 247, 0.55);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
  animation: spinReverse 22s linear infinite;
}

.astral-core-glyph {
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 0 16px rgba(56, 189, 248, 0.8));
}

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

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

.speed-metric-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgba(22, 29, 53, 0.75);
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.speed-metric-box:hover {
  transform: translateX(4px);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.15);
}

.metric-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
}

.metric-value {
  font-size: 16px;
  font-weight: 800;
  color: #38bdf8;
  font-family: var(--font-mono);
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
}

/* ====================================================================
   特性网格（3D 倾斜 + 动态边框流光）
   ==================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  will-change: transform;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-astral), var(--accent-cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 30px rgba(99, 102, 241, 0.2);
}

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

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  background: radial-gradient(circle at 30% 30%, rgba(99, 102, 241, 0.35) 0%, rgba(15, 20, 36, 0.6) 100%);
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #38bdf8;
  margin-bottom: 22px;
  filter: drop-shadow(0 0 12px rgba(99, 102, 241, 0.4));
  transition: transform var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.1) rotate(6deg);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.feature-text {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ====================================================================
   流媒体与 AI 支持网格（动漫晶体铭牌）
   ==================================================================== */
.logo-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.logo-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.logo-item-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.45);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35), 0 0 24px rgba(6, 182, 212, 0.2);
}

.logo-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-item-name {
  font-weight: 800;
  font-size: 1.15rem;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.logo-item-tag {
  font-size: 12px;
  padding: 3px 10px;
  background: rgba(99, 102, 241, 0.18);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-full);
  font-weight: 700;
}

.logo-item-desc {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.55;
}

/* ====================================================================
   定价模块（动漫公会阶位徽章 + 推荐光晕）
   ==================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: stretch;
}

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

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 35px rgba(99, 102, 241, 0.25);
}

/* 推荐档位（极光绚烂光晕） */
.pricing-card-recommended {
  border: 1.5px solid rgba(244, 63, 94, 0.65);
  background: radial-gradient(circle at 50% 0%, rgba(244, 63, 94, 0.12) 0%, rgba(18, 24, 44, 0.85) 75%);
  box-shadow: 0 0 45px rgba(244, 63, 94, 0.28), 0 12px 32px rgba(0, 0, 0, 0.5);
}

.pricing-card-recommended:hover {
  border-color: var(--accent-sakura);
  box-shadow: 0 0 55px rgba(244, 63, 94, 0.45), 0 24px 48px rgba(0, 0, 0, 0.6);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 28px;
  background: linear-gradient(135deg, #f43f5e 0%, #db2777 100%);
  color: #ffffff;
  font-size: 12.5px;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 0 20px rgba(244, 63, 94, 0.5);
  letter-spacing: 0.05em;
}

.pricing-header {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.pricing-tier-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.pricing-tier-desc {
  font-size: 14.5px;
  color: var(--text-sub);
  min-height: 42px;
}

.pricing-price-box {
  margin: 18px 0 8px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

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

.pricing-amount {
  font-size: 2.75rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -0.03em;
  font-family: var(--font-mono);
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.pricing-period {
  font-size: 14.5px;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: #cbd5e1;
}

.pricing-feature-item svg {
  width: 19px;
  height: 19px;
  color: var(--accent-cyan);
  flex-shrink: 0;
  margin-top: 3px;
  filter: drop-shadow(0 0 6px var(--accent-cyan));
}

/* ====================================================================
   使用场景卡（轻小说/异世界冒险情境卡）
   ==================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.scenario-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.45);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 24px rgba(99, 102, 241, 0.18);
}

.scenario-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 10px;
}

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

.scenario-device {
  font-size: 13px;
  color: #7dd3fc;
  background: rgba(6, 182, 212, 0.12);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(6, 182, 212, 0.3);
  font-weight: 600;
}

.scenario-desc {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.68;
}

/* ====================================================================
   FAQ 手风琴（灵晶展开条目）
   ==================================================================== */
.faq-list {
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  border-color: rgba(99, 102, 241, 0.35);
}

.faq-item[open] {
  border-color: var(--border-glow);
  box-shadow: 0 0 24px rgba(99, 102, 241, 0.2);
}

.faq-item summary {
  padding: 22px 26px;
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-toggle-icon {
  width: 22px;
  height: 22px;
  color: var(--accent-cyan);
  filter: drop-shadow(0 0 6px var(--accent-cyan));
  transition: transform var(--transition-smooth);
}

.faq-item[open] .faq-toggle-icon {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 26px 24px;
  font-size: 15.5px;
  color: var(--text-sub);
  line-height: 1.72;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  padding-top: 18px;
}

/* ====================================================================
   FINAL CTA（时空星门终章转化）
   ==================================================================== */
.final-cta-section {
  text-align: center;
  padding: 96px 24px;
  position: relative;
  background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.18) 0%, rgba(9, 12, 21, 0.95) 75%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

.final-cta-container {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 2;
}

.final-cta-title {
  font-size: 2.25rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  text-shadow: 0 0 24px rgba(99, 102, 241, 0.4);
}

.final-cta-desc {
  font-size: 1.15rem;
  color: var(--text-sub);
  margin-bottom: 36px;
  line-height: 1.68;
}

/* ====================================================================
   页脚 FOOTER（星夜尽头与版权）
   ==================================================================== */
.site-footer {
  background: rgba(7, 9, 16, 0.95);
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  padding: 56px 20px 36px;
  margin-top: auto;
  position: relative;
  z-index: 10;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px 36px;
  margin-bottom: 26px;
}

.footer-nav a {
  color: var(--text-sub);
  font-size: 14.5px;
  font-weight: 600;
  transition: color var(--transition-fast);
}

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

.footer-disclaimer {
  text-align: center;
  font-size: 13.5px;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 18px;
  line-height: 1.65;
}

.footer-copyright {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ====================================================================
   移动端吸底 CTA（霓虹晶透悬浮）
   ==================================================================== */
.sticky-mobile-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(13, 17, 32, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-glow);
  padding: 12px 20px;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 90;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.6);
}

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

.sticky-mobile-info {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.25;
}

.sticky-mobile-info span {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-cyan);
}

/* ====================================================================
   文章与指南卡片样式
   ==================================================================== */
.breadcrumb-nav {
  padding: 20px 0;
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  flex-wrap: wrap;
}

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

.breadcrumb-item a:hover {
  color: var(--accent-cyan);
}

.breadcrumb-separator {
  color: rgba(148, 163, 184, 0.35);
}

.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 24px 72px;
  position: relative;
  z-index: 1;
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-title {
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1.32;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.5);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: var(--text-muted);
}

.article-body {
  font-size: 16.5px;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-body p {
  margin-bottom: 24px;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-top: 48px;
  margin-bottom: 18px;
  line-height: 1.38;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.article-body h2::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #f1f5f9;
  margin-top: 32px;
  margin-bottom: 14px;
}

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

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

.article-body blockquote {
  border-left: 4px solid var(--accent-astral);
  background: rgba(30, 41, 69, 0.45);
  padding: 18px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #e2e8f0;
}

.article-callout {
  background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.16) 0%, rgba(20, 27, 49, 0.8) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 40px 0;
  text-align: center;
  box-shadow: 0 0 35px rgba(99, 102, 241, 0.2);
}

.article-callout-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.article-callout-desc {
  font-size: 15px;
  color: #cbd5e1;
  margin-bottom: 20px;
}

.article-related-links {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 40px 0;
}

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

.article-related-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* 指南卡片网格 */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.guide-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), 0 0 28px rgba(99, 102, 241, 0.22);
}

.guide-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.guide-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.42;
}

.guide-card-title a {
  color: inherit;
}

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

.guide-card-excerpt {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

/* 网站地图样式 */
.sitemap-section-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-top: 36px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.sitemap-links-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 28px;
}

.sitemap-links-list li a {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  color: #e2e8f0;
  font-weight: 600;
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.sitemap-links-list li a:hover {
  border-color: var(--accent-cyan);
  color: #38bdf8;
  transform: translateX(4px);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
}

/* ====================================================================
   响应式断点适配
   ==================================================================== */
@media (min-width: 640px) {
  .logo-list-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .nav-menu {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
  .mobile-nav-panel {
    display: none !important;
  }
  .hero-layout {
    grid-template-columns: 1.25fr 0.75fr;
  }
  .hero-title {
    font-size: 3.2rem;
  }
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .sticky-mobile-cta {
    display: none !important;
  }
  .sitemap-links-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 减弱动态动效支持 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .meteor-streak, .sakura-petal {
    display: none !important;
  }
}