/* ====================================================================
   耶耶云 - 苍穹星轨 · 次元结界动漫视觉设计系统 (Layer 1.5 Anime Theme)
   视觉基调：深邃星夜穹顶 + 苍蓝以太光晕 + 樱落星尘 + 琉璃晶透魔导卡片
   ==================================================================== */

:root {
  /* 基础色彩 */
  --bg-deep: #080c16;
  --bg-cosmic: #0c1222;
  --bg-surface: rgba(16, 24, 44, 0.72);
  --bg-surface-elevated: rgba(22, 33, 60, 0.85);
  --bg-surface-glass: rgba(255, 255, 255, 0.04);

  /* 文字系统 */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #080c16;

  /* 动漫能量色 */
  --anime-cyan: #38bdf8;
  --anime-cyan-glow: rgba(56, 189, 248, 0.45);
  --anime-indigo: #6366f1;
  --anime-indigo-glow: rgba(99, 102, 241, 0.4);
  --anime-sakura: #f43f5e;
  --anime-sakura-soft: rgba(244, 63, 94, 0.15);
  --anime-gold: #fbbf24;
  --anime-gold-glow: rgba(251, 191, 36, 0.4);
  --anime-emerald: #10b981;

  /* 边框与阴影 */
  --border-ethereal: rgba(56, 189, 248, 0.18);
  --border-ethereal-hover: rgba(56, 189, 248, 0.55);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: 0 0 15px rgba(56, 189, 248, 0.25);
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.45);
  --shadow-neon-cyan: 0 0 20px rgba(56, 189, 248, 0.35);
  --shadow-neon-button: 0 0 24px rgba(56, 189, 248, 0.5), 0 4px 12px rgba(0, 0, 0, 0.4);

  /* 几何规范 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --container-max: 1160px;
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::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-main);
  background-color: var(--bg-deep);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.1) 0%, transparent 45%),
    radial-gradient(circle at 85% 35%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 50% 85%, rgba(244, 63, 94, 0.06) 0%, transparent 60%);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* ================= 动漫背景层（星尘、流星、星轨背景） ================= */
.anime-cosmic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* 流星效果 */
.shooting-star {
  position: absolute;
  top: 0;
  left: 50%;
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, rgba(255,255,255,1), rgba(56,189,248,0.8), transparent);
  transform: rotate(-35deg);
  opacity: 0;
  animation: meteor-animation 8s linear infinite;
}

.shooting-star-1 {
  top: 8%;
  left: 70%;
  animation-delay: 1.2s;
}

.shooting-star-2 {
  top: 25%;
  left: 30%;
  animation-delay: 4.8s;
}

.shooting-star-3 {
  top: 5%;
  left: 90%;
  animation-delay: 7.5s;
}

@keyframes meteor-animation {
  0% {
    transform: rotate(-35deg) translateX(0);
    opacity: 0;
  }
  5% {
    opacity: 1;
  }
  15% {
    transform: rotate(-35deg) translateX(-600px);
    opacity: 0;
  }
  100% {
    transform: rotate(-35deg) translateX(-600px);
    opacity: 0;
  }
}

/* 漂浮星尘粒子 (CSS Keyframes) */
.stardust-particle {
  position: absolute;
  border-radius: 50%;
  background: #ffffff;
  pointer-events: none;
  opacity: 0.3;
  animation: float-stardust 12s ease-in-out infinite;
}

@keyframes float-stardust {
  0%, 100% {
    transform: translateY(0) scale(1);
    opacity: 0.2;
  }
  50% {
    transform: translateY(-28px) scale(1.3);
    opacity: 0.7;
  }
}

/* 链接与交互焦点 */
a {
  color: var(--anime-cyan);
  text-decoration: none;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

a:hover {
  color: #7dd3fc;
  text-shadow: 0 0 8px var(--anime-cyan-glow);
}

a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--anime-cyan);
  outline-offset: 4px;
}

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

.site-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;
}

/* ================= 头部导航（星际结界毛玻璃 Header） ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(8, 12, 22, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-ethereal);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--text-main);
  letter-spacing: 0.02em;
}

.brand-link:hover {
  color: #ffffff;
}

.brand-logo-img {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 0 8px var(--anime-cyan-glow));
  transition: transform 0.3s ease;
}

.brand-link:hover .brand-logo-img {
  transform: rotate(15deg) scale(1.08);
}

.brand-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--anime-cyan);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.05em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--anime-cyan), var(--anime-indigo));
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

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

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

.mobile-menu-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  color: var(--text-main);
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.mobile-menu-toggle:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--anime-cyan);
}

/* ================= 动漫高能 CTA 按钮体系 ================= */
.btn-primary, .nav-action-btn, .sticky-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, #2563eb 0%, #38bdf8 100%);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-neon-button);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease, filter 0.2s ease;
}

/* 光泽扫掠特效（Shimmer sweep） */
.btn-primary::before, .nav-action-btn::before, .sticky-cta-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: skewX(-25deg);
  animation: shine-sweep 4.5s ease-in-out infinite;
}

@keyframes shine-sweep {
  0%, 60% {
    left: -120%;
  }
  100% {
    left: 200%;
  }
}

.btn-primary {
  min-height: 52px;
  padding: 14px 34px;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.nav-action-btn {
  padding: 9px 20px;
  font-size: 0.92rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.35);
}

.btn-primary:hover, .nav-action-btn:hover, .sticky-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.7), 0 6px 16px rgba(0, 0, 0, 0.5);
  filter: brightness(1.08);
  color: #ffffff;
}

.btn-primary:active, .nav-action-btn:active, .sticky-cta-btn:active {
  transform: translateY(1px);
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 14px 28px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  background: rgba(22, 33, 60, 0.6);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: rgba(30, 45, 80, 0.85);
  border-color: var(--anime-cyan);
  color: #ffffff;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.25);
  transform: translateY(-2px);
}

/* ================= 通用 Section 规范 ================= */
.page-section {
  padding-top: 88px;
  padding-bottom: 88px;
  position: relative;
  z-index: 1;
}

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--anime-cyan);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.28);
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.15);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.3;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================= Hero 区域（主首屏 · 星轨魔导次元仪） ================= */
.hero-section {
  padding-top: 96px;
  padding-bottom: 96px;
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 52px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #ffffff;
  background: rgba(22, 33, 60, 0.7);
  border: 1px solid var(--border-ethereal);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
}

.hero-tag-dot {
  width: 9px;
  height: 9px;
  background-color: var(--anime-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--anime-cyan);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% {
    transform: scale(1);
    opacity: 0.9;
  }
  50% {
    transform: scale(1.4);
    opacity: 1;
    box-shadow: 0 0 16px var(--anime-cyan);
  }
}

.hero-heading {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.22;
  color: #ffffff;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
}

.hero-heading span.accent-text {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #f43f5e 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 40px;
}

.hero-trust-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: #cbd5e1;
  font-weight: 500;
}

.trust-icon {
  width: 18px;
  height: 18px;
  color: var(--anime-cyan);
  flex-shrink: 0;
  filter: drop-shadow(0 0 5px var(--anime-cyan-glow));
}

/* Hero 右侧：魔导星轨全息交互卡片 */
.hero-visual {
  position: relative;
}

.astral-stargate-box {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-glass), 0 0 40px rgba(56, 189, 248, 0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.astral-stargate-box:hover {
  border-color: var(--border-ethereal-hover);
  box-shadow: var(--shadow-glass), 0 0 50px rgba(56, 189, 248, 0.22);
}

/* 旋转魔法阵星轨背景（纯 SVG 注入动画） */
.stargate-astrolabe-bg {
  position: absolute;
  top: -40px;
  right: -40px;
  width: 260px;
  height: 260px;
  opacity: 0.22;
  pointer-events: none;
  animation: rotate-astrolabe 36s linear infinite;
  transform-origin: center;
}

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

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 22px;
  position: relative;
  z-index: 2;
}

.preview-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #10b981;
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.25);
}

.preview-metric-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 22px;
  position: relative;
  z-index: 2;
}

.metric-box {
  background: rgba(12, 18, 34, 0.7);
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.metric-box:hover {
  border-color: var(--border-ethereal);
  background: rgba(18, 28, 52, 0.8);
}

.metric-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.metric-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--anime-cyan);
  text-shadow: 0 0 12px var(--anime-cyan-glow);
}

.preview-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(12, 18, 34, 0.65);
  border: 1px solid var(--border-subtle);
  margin-bottom: 12px;
  font-size: 0.92rem;
  position: relative;
  z-index: 2;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.preview-node-item:hover {
  transform: translateX(4px);
  border-color: var(--border-ethereal);
  background: rgba(18, 28, 52, 0.85);
}

.node-name {
  font-weight: 600;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-name svg {
  color: var(--anime-cyan);
}

.node-ping {
  font-weight: 700;
  color: #10b981;
  font-size: 0.85rem;
  background: rgba(16, 185, 129, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

/* ================= Features 特性卡（魔导晶能卡片体系） ================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--anime-cyan), var(--anime-indigo), transparent);
  opacity: 0.4;
  transition: opacity 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-ethereal-hover);
  box-shadow: var(--shadow-glass), 0 0 35px rgba(56, 189, 248, 0.2);
}

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

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--anime-cyan);
  margin-bottom: 24px;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.2);
  transition: transform 0.3s ease, background 0.3s ease;
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.1) rotate(6deg);
  background: rgba(56, 189, 248, 0.22);
}

.feature-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-card-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================= AI 支持模块（全息智导阵列） ================= */
.ai-section {
  background: rgba(12, 18, 34, 0.65);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  backdrop-filter: blur(10px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.ai-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-ethereal);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.18);
}

.ai-tool-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.ai-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a5b4fc;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.2);
}

.ai-tool-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.ai-tool-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ================= 流媒体支持（4K 霓虹幻影） ================= */
.stream-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stream-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.stream-card:hover {
  transform: translateY(-4px);
  border-color: rgba(244, 63, 94, 0.4);
  box-shadow: 0 0 25px rgba(244, 63, 94, 0.2);
}

.stream-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.stream-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--anime-sakura-soft);
  border: 1px solid rgba(244, 63, 94, 0.35);
  color: #fb7185;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px rgba(244, 63, 94, 0.2);
}

.stream-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.stream-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ================= Pricing 套餐区（星轨法阵推荐卡） ================= */
.pricing-section {
  background: rgba(12, 18, 34, 0.6);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-ethereal);
  box-shadow: var(--shadow-glass), 0 0 35px rgba(56, 189, 248, 0.2);
}

/* 中档推荐卡片高亮光效 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(22, 33, 62, 0.95) 0%, rgba(14, 22, 42, 0.95) 100%);
  border: 2px solid var(--anime-cyan);
  box-shadow: var(--shadow-glass), 0 0 45px rgba(56, 189, 248, 0.35);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: var(--shadow-glass), 0 0 60px rgba(56, 189, 248, 0.5);
}

.pricing-badge-popular {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #38bdf8 0%, #6366f1 100%);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 5px 20px;
  border-radius: var(--radius-pill);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.6);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

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

.pricing-tier-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  min-height: 44px;
}

.pricing-price-box {
  margin-bottom: 32px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--anime-cyan);
}

.pricing-num {
  font-size: 3rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  text-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.pricing-unit {
  font-size: 0.95rem;
  color: var(--text-subtle);
  margin-left: 4px;
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 36px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: #cbd5e1;
  margin-bottom: 16px;
}

.pricing-check-icon {
  width: 19px;
  height: 19px;
  color: var(--anime-cyan);
  flex-shrink: 0;
  margin-top: 2px;
  filter: drop-shadow(0 0 4px var(--anime-cyan-glow));
}

.pricing-cta-btn {
  width: 100%;
  text-align: center;
}

/* ================= 使用场景（场景沉浸卡片） ================= */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.scenario-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(12px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.scenario-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-ethereal-hover);
  box-shadow: var(--shadow-glass), 0 0 30px rgba(56, 189, 248, 0.2);
}

.scenario-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--anime-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.scenario-device {
  font-size: 0.88rem;
  color: #94a3b8;
  font-weight: 600;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.scenario-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================= FAQ 区域（星晶手风琴） ================= */
.faq-container {
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 18px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item:hover, .faq-item[open] {
  border-color: var(--border-ethereal);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}

.faq-summary {
  padding: 22px 28px;
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  min-height: 52px;
  transition: color 0.2s ease;
}

.faq-summary:hover {
  color: var(--anime-cyan);
}

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

.faq-icon-arrow {
  width: 22px;
  height: 22px;
  color: var(--anime-cyan);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 28px 24px 28px;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 4px;
}

/* ================= Final CTA（次元传送门终局唤醒） ================= */
.final-cta-section {
  padding-top: 88px;
  padding-bottom: 88px;
  position: relative;
  z-index: 1;
}

.final-cta-box {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  background: linear-gradient(180deg, rgba(22, 33, 62, 0.9) 0%, rgba(12, 18, 34, 0.95) 100%);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  box-shadow: var(--shadow-glass), 0 0 50px rgba(56, 189, 248, 0.2);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.final-cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--anime-cyan), var(--anime-indigo), transparent);
}

.final-cta-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 18px rgba(0, 0, 0, 0.5);
}

.final-cta-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
}

/* ================= 页脚 Footer ================= */
.site-footer {
  background: #050810;
  color: #64748b;
  padding-top: 56px;
  padding-bottom: 56px;
  margin-top: auto;
  font-size: 0.92rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  z-index: 10;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-nav-link {
  color: #94a3b8;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

.footer-nav-link:hover {
  color: var(--anime-cyan);
  text-shadow: 0 0 8px var(--anime-cyan-glow);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.88rem;
}

.footer-disclosure {
  color: #64748b;
}

/* ================= 移动端吸底 CTA ================= */
.sticky-bottom-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(8, 12, 22, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 12px 20px;
  border-top: 1px solid var(--border-ethereal);
  z-index: 50;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
  transition: transform 0.2s ease;
}

.sticky-cta-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  font-size: 1.05rem;
}

/* ================= 指南与文章页面体系 ================= */
.article-page-wrap {
  padding-top: 56px;
  padding-bottom: 88px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: #64748b;
  margin-bottom: 32px;
}

.breadcrumbs a {
  color: #94a3b8;
}

.breadcrumbs a:hover {
  color: var(--anime-cyan);
}

.article-main-card, .legal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-lg);
  padding: 52px;
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
}

.article-header {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 32px;
}

.article-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 14px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.article-lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: #e2e8f0;
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--anime-cyan);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 36px;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.1);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 44px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #e2e8f0;
  margin-top: 26px;
  margin-bottom: 14px;
}

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

.article-body ul, .article-body ol {
  margin-left: 24px;
  margin-bottom: 22px;
}

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

.article-faq-box {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.article-cta-box {
  background: linear-gradient(180deg, rgba(22, 33, 62, 0.85) 0%, rgba(12, 18, 34, 0.9) 100%);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  margin-top: 52px;
  box-shadow: var(--shadow-glass);
}

.article-cta-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

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

.related-posts-box {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.related-posts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.related-post-link {
  font-weight: 600;
  color: var(--anime-cyan);
}

.related-post-link:hover {
  text-decoration: underline;
}

/* ================= 指南列表页（jiaocheng.html） ================= */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.guide-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-ethereal);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(12px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.guide-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-ethereal-hover);
  box-shadow: var(--shadow-glass), 0 0 35px rgba(56, 189, 248, 0.22);
}

.guide-card-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  display: flex;
  gap: 12px;
}

.guide-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
  line-height: 1.4;
}

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

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

.guide-card-excerpt {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 26px;
  flex-grow: 1;
}

.guide-card-link {
  font-weight: 600;
  color: var(--anime-cyan);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ================= 法律合规页（Legal Pages） ================= */
.legal-section {
  margin-top: 36px;
}

.legal-section h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
}

.legal-section p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.legal-section ul {
  margin-left: 24px;
  margin-bottom: 16px;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ================= 网站地图页（Sitemap HTML） ================= */
.sitemap-group {
  margin-bottom: 40px;
}

.sitemap-group-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.sitemap-links-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.sitemap-link-item a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--anime-cyan);
}

/* ================= 响应式媒体查询 ================= */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .features-grid, .pricing-grid, .scenario-grid, .stream-grid, .ai-grid, .guides-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
}

@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(8, 12, 22, 0.96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-ethereal);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  }
  .site-nav.open {
    display: flex;
  }
  .mobile-menu-toggle {
    display: inline-flex;
  }
  .hero-heading {
    font-size: 2.2rem;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .sticky-bottom-cta {
    display: block;
  }
  body {
    padding-bottom: 74px;
  }
  .article-main-card, .legal-card, .final-cta-box {
    padding: 28px 20px;
  }
  .sitemap-links-list {
    grid-template-columns: 1fr;
  }
}