/* ==========================================================================
   龙猫云 (LongMao Cloud) - 极致高质感云雾浅灰 (Mist Light Gray 2.0) 样式表
   ========================================================================== */

/* 1. 全局变量与 Reset */
:root {
  /* 极致云雾浅灰基调 */
  --bg-main: #f3f5f8;
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #edf2f7 50%, #e2e8f0 100%);
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  
  --border-color: rgba(203, 213, 225, 0.7);
  --border-glow: rgba(37, 99, 235, 0.3);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-white: #ffffff;

  --accent-blue: #2563eb;
  --accent-cyan: #0284c7;
  --accent-teal: #0d9488;
  --accent-emerald: #10b981;
  --accent-purple: #7c3aed;
  
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #0284c7 100%);
  --accent-gradient-hover: linear-gradient(135deg, #1d4ed8 0%, #0369a1 100%);
  --card-gradient-border: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(226,232,240,0.6));
  
  --shadow-sm: 0 4px 6px -1px rgba(148, 163, 184, 0.12), 0 2px 4px -2px rgba(148, 163, 184, 0.08);
  --shadow-md: 0 12px 28px -6px rgba(148, 163, 184, 0.22), 0 8px 12px -6px rgba(148, 163, 184, 0.12);
  --shadow-lg: 0 25px 50px -12px rgba(148, 163, 184, 0.35);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.22);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background: var(--bg-main);
  background-image: 
    radial-gradient(at 10% 10%, rgba(37, 99, 235, 0.06) 0px, transparent 50%),
    radial-gradient(at 90% 90%, rgba(13, 148, 136, 0.06) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(124, 58, 237, 0.03) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 95px 0;
  position: relative;
}

/* 2. 导航栏 Header */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 76px;
  background: rgba(243, 245, 248, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.navbar.scrolled {
  height: 68px;
  box-shadow: var(--shadow-sm);
  background: rgba(255, 255, 255, 0.94);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: var(--shadow-glow);
  transition: var(--transition-normal);
}

.logo:hover .logo-icon {
  transform: rotate(-8deg) scale(1.08);
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #0f172a 0%, #2563eb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-badge {
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent-blue);
  padding: 3px 9px;
  border-radius: var(--radius-full);
  margin-left: 4px;
  border: 1px solid rgba(37, 99, 235, 0.2);
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-blue);
  transition: var(--transition-fast);
  border-radius: var(--radius-full);
}

.nav-link:hover {
  color: var(--accent-blue);
}

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

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--accent-gradient);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  border: none;
  cursor: pointer;
}

.btn-cta:hover {
  background: var(--accent-gradient-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-cta:active {
  transform: translateY(0);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* 3. Hero Section (主视觉区 左右分布 layout) */
.hero {
  padding-top: 145px;
  padding-bottom: 80px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
}

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

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--accent-blue);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulseDot 1.8s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -1px;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.hero-title span {
  background: linear-gradient(135deg, #2563eb 0%, #0d9488 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

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

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  border-top: 1px dashed var(--border-color);
  padding-top: 28px;
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-blue);
}

.hero-stat-lbl {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 动态 Hero 右侧卡片 (Dynamic Interactive Dashboard Card) */
.hero-right {
  position: relative;
}

.hero-dynamic-card {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.hero-dynamic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
}

.card-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
}

.live-badge {
  font-size: 0.75rem;
  padding: 2px 10px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald);
  border-radius: var(--radius-full);
  font-weight: 700;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* 动态节点 Ping 列表 */
.nodes-ping-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.node-ping-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.node-ping-item:hover {
  border-color: var(--accent-blue);
  transform: translateX(4px);
  background: #ffffff;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-flag {
  font-size: 1.2rem;
}

.node-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.node-tech {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.node-ping-val {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 6px;
}

.signal-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.signal-bar {
  width: 3px;
  background: var(--accent-emerald);
  border-radius: 1px;
}

/* 动态速率图表示意 */
.speed-preview-box {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: var(--radius-md);
  padding: 18px;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.speed-info h4 {
  font-size: 0.8rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.speed-info div {
  font-size: 1.6rem;
  font-weight: 900;
  color: #38bdf8;
}

.speed-graph-svg {
  width: 140px;
  height: 40px;
}

/* 4. 通用 Section Title */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px auto;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
}

/* 5. 核心优势 Core Advantages */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.4);
  background: var(--bg-card-hover);
}

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

.feature-icon-box {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12) 0%, rgba(2, 132, 199, 0.18) 100%);
  color: var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.8rem;
  border: 1px solid rgba(37, 99, 235, 0.2);
  box-shadow: 0 8px 16px -4px rgba(37, 99, 235, 0.15);
}

.feature-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 6. 流媒体与 AI 支持图卡 (Enhanced Crisp SVGs) */
.streaming-section {
  background: rgba(255, 255, 255, 0.6);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.supported-chips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.chip-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.chip-card:hover {
  border-color: var(--accent-teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.chip-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-weight: 800;
  font-size: 1.15rem;
}

.chip-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  border: 1px solid var(--border-color);
}

.brand-icons-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.brand-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.brand-item:hover {
  background: #ffffff;
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-sm);
}

.brand-svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

/* 7. 价格对比表 (参考真实机场计费与套餐) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 42px 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.popular {
  border: 2.5 solid var(--accent-blue);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-8px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-sm);
}

.pricing-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.pricing-sub {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 11px 0;
  border-bottom: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li::before {
  content: "✓";
  color: var(--accent-blue);
  font-weight: 900;
  font-size: 1.1rem;
}

/* 7.5 SEO 文章图卡板块 (放置于价格板块下方) */
.articles-section {
  background: rgba(255, 255, 255, 0.4);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.article-card-tag {
  align-self: flex-start;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--accent-blue);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.article-card-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card-title a {
  transition: var(--transition-fast);
}

.article-card-title a:hover {
  color: var(--accent-blue);
}

.article-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px dashed var(--border-color);
  padding-top: 16px;
  margin-bottom: 20px;
}

.article-card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-read {
  flex: 1;
  text-align: center;
  padding: 10px 14px;
  font-size: 0.88rem;
  font-weight: 700;
  background: #f1f5f9;
  color: var(--text-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition-fast);
}

.btn-read:hover {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
}

.btn-proxy-cta {
  flex: 1;
  text-align: center;
  padding: 10px 14px;
  font-size: 0.88rem;
  font-weight: 700;
  background: var(--accent-gradient);
  color: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.btn-proxy-cta:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

/* 8. 用户评价 Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stars {
  color: #f59e0b;
  font-size: 1.05rem;
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
  font-style: italic;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #ffffff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
}

.user-name {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-primary);
}

.user-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 9. FAQ Section */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 240px;
  padding-bottom: 22px;
}

/* 10. 页脚 Footer (严格遵循：只保留四个标题) */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-nav-item {
  font-size: 1.05rem;
  font-weight: 700;
  color: #e2e8f0;
  transition: var(--transition-fast);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
}

.footer-nav-item:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.footer-bottom {
  text-align: center;
  font-size: 0.88rem;
  color: #64748b;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 30px;
}

/* 11. 右侧浮动章节导航箭头 Widget */
.section-nav-widget {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  padding: 12px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
}

.nav-arrow-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition-fast);
  user-select: none;
}

.nav-arrow-btn:hover {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
  transform: scale(1.12);
  box-shadow: var(--shadow-glow);
}

.nav-arrow-btn:active {
  transform: scale(0.92);
}

.nav-dots {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 4px 0;
}

.dot-item {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: #cbd5e1;
  transition: var(--transition-fast);
  cursor: pointer;
}

.dot-item.active {
  height: 22px;
  background: var(--accent-blue);
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.6);
}

/* 12. 响应式适配 @media */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .supported-chips {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar {
    height: 64px;
  }
  .nav-links {
    display: none;
  }
  .hero {
    padding-top: 110px;
    padding-bottom: 60px;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .supported-chips,
  .brand-icons-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.popular {
    transform: none;
  }
  .section-nav-widget {
    right: 10px;
    padding: 8px 6px;
  }
  .nav-arrow-btn {
    width: 34px;
    height: 34px;
    font-size: 0.95rem;
  }
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
}