/* 糖果云机场 - 图2 充气气囊与晶莹白磨砂玻璃 UI 规范 CSS 样式系统 (Inflatable Glass & Pastel Aurora UI Specs) */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Inter:wght@400;500;600;700;800;900&family=Outfit:wght@500;600;700;800;900&display=swap');

:root {
  /* 1. 色彩基底 (Pastel Aurora Base) */
  --bg-main: #fcfbfd;
  --bg-secondary: #f5f3f9;
  --bg-gradient: linear-gradient(180deg, #fcfbfd 0%, #f5f3f9 50%, #eeeaf7 100%);
  
  --aurora-lavender: #e0d7ff;
  --aurora-pink: #ffd6e5;
  --aurora-cyan: #d0f4de;
  
  /* 核心点缀色 (Electric Bubble Purple & Strawberry Pink) */
  --accent-purple: #8b5cf6;
  --accent-purple-dark: #7c3aed;
  --accent-pink: #ec4899;
  --accent-cyan: #38bdf8;
  
  --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #d946ef 50%, #ec4899 100%);
  --bubble-gradient: linear-gradient(135deg, #a78bfa 0%, #f472b6 100%);
  
  /* 2. 晶莹白磨砂玻璃卡片 (Frosted Glassmorphism 3.0) */
  --jelly-bg: rgba(255, 255, 255, 0.72);
  --jelly-border: rgba(255, 255, 255, 0.9);
  --inner-border: rgba(255, 255, 255, 0.6);
  --jelly-shadow: 0 24px 60px -12px rgba(139, 92, 246, 0.08), 0 8px 24px -4px rgba(0, 0, 0, 0.03);
  --jelly-shadow-hover: 0 32px 70px -10px rgba(139, 92, 246, 0.16), 0 12px 30px -4px rgba(139, 92, 246, 0.1);
  
  /* 文字颜色 */
  --text-main: #0f172a;
  --text-sub: #475569;
  --text-muted: #64748b;
  
  --font-heading: 'Outfit', 'Inter', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

a {
  text-decoration: none;
  color: inherit;
}
a:visited {
  color: inherit;
}

/* 锚点跳转防顶部导航遮挡 */
section, [id] {
  scroll-margin-top: 140px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  letter-spacing: -0.015em;
}

/* 页面极浅弥散光晕 (Pastel Aurora Diffusion) */
body::before, body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.75;
}
body::before {
  width: 700px;
  height: 700px;
  background: var(--aurora-lavender);
  top: -150px;
  left: -100px;
  animation: auroraPulse 16s ease-in-out infinite alternate;
}
body::after {
  width: 750px;
  height: 750px;
  background: var(--aurora-pink);
  bottom: -200px;
  right: -100px;
  animation: auroraPulse 20s ease-in-out infinite alternate-reverse;
}

@keyframes auroraPulse {
  0% { opacity: 0.6; transform: scale(1) translate(0, 0); }
  50% { opacity: 0.85; transform: scale(1.1) translate(40px, 30px); }
  100% { opacity: 0.65; transform: scale(0.95) translate(-20px, -20px); }
}

/* 通用容器 */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 晶莹白磨砂玻璃卡片 (Inflatable Glass 3.0) */
.jelly-card {
  background: var(--jelly-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--jelly-border);
  border-radius: 32px; /* 鹅卵石微膨胀大圆角 */
  box-shadow: var(--jelly-shadow);
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}
.jelly-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 32px;
  border: 1px solid var(--inner-border);
  pointer-events: none;
}
.jelly-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--jelly-shadow-hover);
  border-color: rgba(255, 255, 255, 1);
}

/* 霓虹/泡泡紫渐变标题 */
.gradient-title {
  font-family: var(--font-heading);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 顶部晶莹白胶囊导航栏 */
.navbar {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: 1240px;
  z-index: 1000;
  padding: 12px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 999px;
  box-shadow: 0 16px 40px -10px rgba(139, 92, 246, 0.1), 0 4px 16px rgba(0, 0, 0, 0.02);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
}
.nav-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.35);
  font-size: 1.3rem;
  animation: logoGlow 3s infinite alternate;
}

@keyframes logoGlow {
  0% { box-shadow: 0 8px 20px rgba(139, 92, 246, 0.35); }
  100% { box-shadow: 0 12px 28px rgba(236, 72, 153, 0.45); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-sub);
  font-weight: 600;
  font-size: 0.96rem;
  transition: color 0.25s ease;
}
.nav-links a:hover {
  color: var(--accent-purple);
}

/* 充气胶囊按钮 (Inflatable Pill CTA Button) */
.cta-btn {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  color: white;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.98rem;
  padding: 13px 30px;
  border-radius: 999px;
  box-shadow: 0 12px 30px -4px rgba(139, 92, 246, 0.4);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: none;
  cursor: pointer;
}
.cta-btn:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 18px 40px -4px rgba(139, 92, 246, 0.55);
  background: linear-gradient(135deg, #9333ea 0%, #6d28d9 100%);
}

.cta-btn-white {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  color: white;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.98rem;
  padding: 13px 30px;
  border-radius: 999px;
  box-shadow: 0 12px 30px -4px rgba(139, 92, 246, 0.4);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: none;
  cursor: pointer;
}
.cta-btn-white:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 18px 40px -4px rgba(139, 92, 246, 0.55);
}

.secondary-btn, .secondary-btn-glass {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.98rem;
  padding: 13px 30px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 10px 28px -4px rgba(139, 92, 246, 0.08);
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.secondary-btn:hover, .secondary-btn-glass:hover {
  background: #ffffff;
  border-color: rgba(139, 92, 246, 0.3);
  color: var(--accent-purple);
  transform: translateY(-2px);
  box-shadow: 0 14px 35px -4px rgba(139, 92, 246, 0.15);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Hero 首屏区 (Inflatable Split Grid) */
.hero {
  padding-top: 170px;
  padding-bottom: 90px;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

/* 充气胶囊 Tag (Hero Tag) */
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  padding: 8px 22px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-purple);
  margin-bottom: 24px;
  box-shadow: 0 10px 25px -4px rgba(139, 92, 246, 0.1);
}

/* 绿色呼吸 LED */
.status-led {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 12px #10b981;
  animation: ledBlink 2s infinite ease-in-out;
}
@keyframes ledBlink {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}

/* 巨幅极简黑灰标题 */
.hero-title, .hero-title-centered {
  font-family: var(--font-heading);
  font-size: 3.8rem;
  line-height: 1.18;
  font-weight: 900;
  margin-bottom: 22px;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.hero-subtitle, .hero-subtitle-centered {
  font-size: 1.18rem;
  color: var(--text-sub);
  margin-bottom: 36px;
  font-weight: 400;
  line-height: 1.75;
}

.hero-actions, .hero-actions-centered {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

/* 底部社交信任 Badge */
.social-proof-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  padding: 8px 22px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--text-sub);
  font-weight: 600;
  box-shadow: 0 8px 24px -4px rgba(139, 92, 246, 0.08);
}

.hero-stats, .hero-stats-row {
  display: flex;
  gap: 40px;
  margin-top: 10px;
  padding-top: 26px;
  border-top: 1px dashed rgba(139, 92, 246, 0.2);
  width: 100%;
}

.stat-item {
  display: flex;
  flex-direction: column;
}
.stat-header {
  display: flex;
  align-items: center;
  gap: 8px;
}
.stat-item h4 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  color: var(--text-main);
  font-weight: 800;
  line-height: 1;
}
.stat-item p {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 6px;
}

/* 3D 悬浮充气软气囊与 4 个轻量级悬浮信息胶囊 (Pill Badges) */
.hero-visual, .hero-visual-centered {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 420px;
}

.marshmallow-stage {
  width: 100%;
  max-width: 520px;
  height: 100%;
  min-height: 420px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 动态装饰主标识：充气糖果云核 (Dynamic Candy-Cloud Core Specification) */
.hero-center-jelly {
  position: relative;
  width: 340px;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
  transform-style: preserve-3d;
  transition: transform 0.15s cubic-bezier(0.2, 0, 0.2, 1);
}

/* 呼吸律动 & 4s 失重漂浮 (4s Cycle: scale 0.97 -> 1.03, 8px float) */
.candy-core-img {
  width: 320px;
  height: 320px;
  object-fit: contain;
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 20px 50px rgba(139, 92, 246, 0.28)) drop-shadow(0 8px 24px rgba(236, 72, 153, 0.22));
  animation: candyCoreBreathing 4s ease-in-out infinite alternate;
}

@keyframes candyCoreBreathing {
  0% {
    transform: translateY(0px) scale(0.97) rotate(0deg);
  }
  50% {
    transform: translateY(-8px) scale(1.03) rotate(1.5deg);
  }
  100% {
    transform: translateY(4px) scale(0.98) rotate(-1.5deg);
  }
}

/* 双层结构 - 内层包裹熏衣草紫与草莓粉弥散发光流体 */
.candy-core-fluid-glow {
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(236, 72, 153, 0.55) 0%, rgba(139, 92, 246, 0.65) 50%, rgba(56, 189, 248, 0.25) 80%, transparent 100%);
  filter: blur(40px);
  z-index: 1;
  animation: fluidGlowFlow 6s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes fluidGlowFlow {
  0% {
    opacity: 0.6;
    transform: scale(0.9) rotate(0deg);
  }
  50% {
    opacity: 0.95;
    transform: scale(1.15) rotate(180deg);
  }
  100% {
    opacity: 0.7;
    transform: scale(0.95) rotate(360deg);
  }
}

/* 双层结构 - 外层高光气模薄膜与环形滑移光泽 */
.candy-core-sheen-ring {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0%, rgba(255, 255, 255, 0.4) 15%, transparent 30%, rgba(255, 255, 255, 0.6) 50%, transparent 65%, rgba(255, 255, 255, 0.3) 85%, transparent 100%);
  filter: blur(12px);
  z-index: 3;
  pointer-events: none;
  opacity: 0.75;
  animation: sheenRotate 8s linear infinite;
}

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

.floating-cloud {
  position: absolute;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 999px;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 16px 35px -6px rgba(139, 92, 246, 0.12), 0 4px 12px rgba(0, 0, 0, 0.03);
  z-index: 3;
  transition: transform 0.3s ease;
}
.floating-cloud:hover {
  transform: scale(1.05);
}
.cloud-badge-1 { top: 5%; left: 0%; }
.cloud-badge-2 { top: 5%; right: 0%; }
.cloud-badge-3 { bottom: 5%; left: 0%; }
.cloud-badge-4 { bottom: 5%; right: 0%; }

.badge-icon { font-size: 1.3rem; }
.badge-text { font-family: var(--font-heading); font-size: 0.92rem; font-weight: 700; color: var(--text-main); }

/* 核心优势板块 */
.features-section {
  padding: 140px 0 90px 0;
  scroll-margin-top: 130px;
}
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px auto;
}
.section-tag {
  font-weight: 800;
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--accent-purple);
  letter-spacing: 2px;
  margin-bottom: 10px;
  display: block;
}
.section-title {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}
.section-desc {
  font-size: 1.08rem;
  color: var(--text-sub);
  font-weight: 500;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}
.feature-card {
  padding: 38px 34px;
}
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 22px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 22px;
}

.feature-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}
.feature-desc {
  font-size: 0.96rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* 套餐价格区域 */
.pricing-section {
  padding: 140px 0 90px 0;
  scroll-margin-top: 130px;
}
.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}
.toggle-btn {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.95);
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-sub);
  cursor: pointer;
  box-shadow: 0 8px 24px -4px rgba(139, 92, 246, 0.06);
  transition: all 0.3s ease;
}
.toggle-btn.active {
  background: var(--accent-purple);
  color: white;
  border-color: transparent;
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.4);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 26px;
}
.pricing-card {
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.pricing-card.popular {
  border: 2px solid var(--accent-purple);
  box-shadow: 0 24px 60px -10px rgba(139, 92, 246, 0.2);
}

.popular-badge {
  position: absolute;
  top: 18px;
  right: -32px;
  background: var(--accent-gradient);
  color: white;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 6px 36px;
  transform: rotate(45deg);
}

.plan-name {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}
.plan-traffic {
  display: inline-block;
  background: rgba(139, 92, 246, 0.12);
  color: var(--accent-purple-dark);
  font-weight: 800;
  font-size: 0.88rem;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.plan-price-box {
  margin-bottom: 24px;
}
.plan-price {
  font-family: var(--font-heading);
  font-size: 2.9rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}
.plan-price span {
  font-size: 1.1rem;
  color: var(--text-muted);
}
.plan-equivalent {
  font-size: 0.88rem;
  color: var(--accent-purple);
  font-weight: 800;
  margin-top: 8px;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.93rem;
  color: var(--text-sub);
  font-weight: 600;
}
.plan-features li i {
  color: var(--accent-purple);
  font-size: 1.1rem;
}

/* 适用人群 */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 26px;
}
.audience-card {
  padding: 34px 28px;
  text-align: center;
}
.audience-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto 18px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.15);
}
.audience-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.audience-desc {
  font-size: 0.92rem;
  color: var(--text-sub);
}

/* 用户评价轮播 */
.testimonials-section {
  padding: 140px 0 90px 0;
  scroll-margin-top: 130px;
}
.carousel-container {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  overflow: hidden;
  padding: 10px;
}
.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}
.carousel-slide {
  min-width: 100%;
  padding: 10px;
}
.testimonial-card {
  padding: 44px;
  text-align: center;
}
.user-quote {
  font-size: 1.18rem;
  color: var(--text-main);
  font-weight: 500;
  margin-bottom: 26px;
  font-style: italic;
  line-height: 1.8;
}
.user-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.user-avatar-img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}
.user-details h5 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}
.user-details p {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.2);
  cursor: pointer;
  transition: all 0.3s ease;
}
.carousel-dot.active {
  width: 34px;
  border-radius: 999px;
  background: var(--accent-purple);
}

/* FAQ 常见答疑 */
.faq-section {
  padding-top: 140px;
  padding-bottom: 90px;
  scroll-margin-top: 130px;
  position: relative;
  z-index: 10;
}
.faq-grid {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.faq-item {
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  overflow: hidden; /* 防止未激活态内容溢出透光 */
}
.faq-question {
  padding: 22px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  user-select: none;
}
.faq-icon {
  font-size: 1rem;
  color: var(--accent-purple);
  transition: transform 0.3s ease;
}
.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-pink);
}

/* 默认未激活状态：完全隐藏答案文本 */
.faq-answer {
  display: none;
  padding: 0 30px 24px 30px;
  color: var(--text-sub);
  font-size: 0.98rem;
  line-height: 1.7;
  border-top: 1px dashed rgba(139, 92, 246, 0.15);
  margin-top: 4px;
  padding-top: 16px;
  animation: faqFadeIn 0.35s ease forwards;
}
.faq-item.active .faq-answer {
  display: block;
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 技术文章 */
.articles-section {
  padding: 140px 0 90px 0;
  scroll-margin-top: 130px;
}
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 32px;
}
.article-card {
  padding: 38px 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.article-title-link {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
  line-height: 1.45;
  display: block;
  margin-bottom: 12px;
  transition: color 0.25s ease;
}
.article-title-link:hover {
  color: var(--accent-purple);
}
.article-excerpt {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 20px;
}
.read-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--accent-purple);
  text-decoration: none;
  transition: all 0.25s ease;
}
.read-more-btn:hover {
  color: var(--accent-pink);
  transform: translateX(4px);
}

/* ----------------------------------------------------
   文章详情页 (Article Detail Page - Fix Navbar Overlap & Typography)
---------------------------------------------------- */
.article-detail-container {
  padding-top: 160px !important;
  padding-bottom: 90px;
  max-width: 1040px;
  margin: 0 auto;
}

/* 禁用长文阅读卡片 3D 倾斜与悬浮变形，保障阅读体验平稳舒缓 */
.article-detail-container .jelly-card {
  transform: none !important;
  transition: border-color 0.3s ease, box-shadow 0.3s ease !important;
}

.article-detail-container .jelly-card:hover {
  transform: none !important;
  box-shadow: var(--jelly-shadow) !important;
  border-color: rgba(255, 255, 255, 0.95) !important;
}

.article-header {
  margin-bottom: 32px;
}

.article-tag {
  display: inline-block;
  background: rgba(139, 92, 246, 0.12);
  color: var(--accent-purple-dark);
  font-weight: 800;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 0.88rem;
  margin-bottom: 16px;
  border: 1px solid rgba(139, 92, 246, 0.2);
}

.article-header h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  line-height: 1.35;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
  border-bottom: 1px dashed rgba(139, 92, 246, 0.2);
  padding-bottom: 24px;
  margin-bottom: 36px;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.article-body {
  font-size: 1.06rem;
  color: var(--text-sub);
  line-height: 1.85;
}

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

.article-body h2 {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 44px 0 20px 0;
  padding-top: 18px;
  border-top: 1px solid rgba(139, 92, 246, 0.12);
}

.article-body h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 32px 0 16px 0;
}

.article-table-wrapper {
  overflow-x: auto;
  margin: 32px 0;
  border-radius: 20px;
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.08);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  border-radius: 20px;
  overflow: hidden;
}

.article-table th {
  background: rgba(139, 92, 246, 0.15);
  color: var(--text-main);
  font-weight: 800;
  padding: 16px 20px;
  text-align: left;
  font-size: 0.96rem;
  border-bottom: 2px solid rgba(139, 92, 246, 0.2);
}

.article-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 0.94rem;
  color: var(--text-sub);
  line-height: 1.6;
}

.article-table tr:hover td {
  background: rgba(139, 92, 246, 0.04);
}

/* 图2 晶莹白磨砂玻璃代码块 (Inflatable Glass 3.0 Light Theme Code Block) */
.code-block {
  margin: 30px 0;
  border-radius: 24px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(139, 92, 246, 0.22);
  box-shadow: 0 16px 45px -10px rgba(139, 92, 246, 0.12), 0 4px 18px rgba(0, 0, 0, 0.03);
  position: relative;
}

.code-block pre {
  background: transparent;
  color: #0f172a;
  padding: 24px 28px;
  font-family: 'Fira Code', 'Cascadia Code', Consolas, Monaco, monospace;
  font-size: 0.94rem;
  line-height: 1.75;
  overflow-x: auto;
  box-shadow: none;
  border: none;
  font-weight: 600;
}

.code-block code {
  color: #0f172a;
}

/* 页脚完整排版 (Footer 4-Column Grid & List Reset) */
.footer {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid rgba(255, 255, 255, 0.95);
  padding: 70px 0 35px 0;
  margin-top: 90px;
  position: relative;
  z-index: 10;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1.1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p {
  margin-top: 16px;
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 380px;
}
.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-links li {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links a {
  text-decoration: none;
  color: var(--text-sub);
  font-size: 0.93rem;
  font-weight: 500;
  transition: all 0.2s ease;
  display: inline-block;
}
.footer-links a:hover {
  color: var(--accent-purple);
  transform: translateX(3px);
}
.footer-bottom {
  border-top: 1px solid rgba(139, 92, 246, 0.12);
  padding-top: 28px;
  text-align: center;
}
.footer-bottom p {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 响应式排版 */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    align-items: center;
  }
  .hero-title, .hero-title-centered {
    font-size: 3.2rem;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title, .hero-title-centered {
    font-size: 2.3rem;
  }
  .hero-stats, .hero-stats-row {
    gap: 20px;
    justify-content: center;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 75px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.95);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
  }
  .nav-links.show {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .cloud-badge-1 { top: 0%; left: -5%; }
  .cloud-badge-2 { top: 0%; right: -5%; }
  .cloud-badge-3 { bottom: 0%; left: -5%; }
  .cloud-badge-4 { bottom: 0%; right: -5%; }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================
   GEO AI Citation Card (AI 引擎推荐速览)
   ========================================== */
.geo-citation-card {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.05) 0%, rgba(139, 92, 246, 0.08) 100%);
  border: 1.5px solid rgba(139, 92, 246, 0.2);
  border-radius: 24px;
  padding: 24px 28px;
  margin: 24px 0 36px 0;
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 32px -8px rgba(139, 92, 246, 0.08);
  transition: all 0.3s ease;
}

.geo-citation-card:hover {
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: 0 16px 40px -8px rgba(139, 92, 246, 0.14);
}

.geo-citation-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.geo-citation-badge {
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
}

.geo-citation-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
}

.geo-citation-body {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-sub);
}

.geo-citation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(139, 92, 246, 0.25);
}

.geo-citation-item {
  font-size: 0.88rem;
  color: var(--text-sub);
}

.geo-citation-item strong {
  color: var(--accent-purple);
  font-weight: 700;
}