/* ==========================================================================
   SHANDIANMAO OFFICIAL - SWISS DESIGN SYSTEM
   Grid, Typography, Clarity & Modern Motion
   ========================================================================== */

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f1f3f5;
  --text-primary: #0f1115;
  --text-secondary: #4b5563;
  --text-muted: #868e96;
  --swiss-red: #e60000;
  --swiss-red-light: #fff0f0;
  --swiss-red-hover: #cc0000;
  --accent-purple: #4f46e5;
  --accent-purple-light: #eff0fe;
  --border-color: #e5e7eb;
  --border-dark: #111111;
  --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
  --card-shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.09);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, Inconsolata, "Fira Mono", "Droid Sans Mono", monospace;
  --container-width: 1240px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ================= Grid & Container ================= */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.swiss-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

/* ================= Typography & Badges ================= */
.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.eyebrow-red {
  color: var(--swiss-red);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 40px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.8125rem;
  font-weight: 600;
}

.badge-red {
  background-color: var(--swiss-red-light);
  color: var(--swiss-red);
  border: 1px solid rgba(230, 0, 0, 0.15);
}

.badge-purple {
  background-color: var(--accent-purple-light);
  color: var(--accent-purple);
  border: 1px solid rgba(79, 70, 229, 0.2);
}

.badge-green {
  background-color: #ecfdf5;
  color: #059669;
  border: 1px solid rgba(5, 150, 105, 0.2);
}

/* ================= Header & Navigation ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-symbol {
  width: 22px;
  height: 22px;
  background-color: var(--swiss-red);
  display: inline-block;
  position: relative;
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-symbol {
  transform: rotate(90deg);
}

.brand-sub {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-left: 4px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--swiss-red);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--swiss-red);
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Swiss Buttons */
.btn-swiss {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: #000000;
  color: #ffffff;
  padding: 12px 26px;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid #000000;
  cursor: pointer;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-swiss:hover {
  background-color: var(--swiss-red);
  border-color: var(--swiss-red);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(230, 0, 0, 0.25);
}

.btn-swiss-secondary {
  background-color: transparent;
  color: #000000;
  border: 1px solid #000000;
}

.btn-swiss-secondary:hover {
  background-color: #000000;
  color: #ffffff;
}

.btn-swiss-red {
  background-color: var(--swiss-red);
  border-color: var(--swiss-red);
  color: #ffffff;
}

.btn-swiss-red:hover {
  background-color: #b30000;
  border-color: #b30000;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* ================= Hero Section (Swiss Design) ================= */
.hero-section {
  position: relative;
  padding: 90px 0 80px;
  background: radial-gradient(circle at 85% 30%, rgba(230, 0, 0, 0.04) 0%, rgba(255, 255, 255, 0) 65%);
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-typography {
  position: relative;
}

.swiss-tag {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero-heading {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: #000000;
  margin-bottom: 24px;
}

.hero-heading span.highlight {
  color: var(--swiss-red);
}

.hero-subhead {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

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

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.trust-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
}

/* Swiss Graphic Element */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.swiss-composition {
  position: relative;
  width: 100%;
  max-width: 440px;
  aspect-ratio: 1 / 1;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.swiss-box-accent {
  width: 96px;
  height: 96px;
  background-color: var(--swiss-red);
  position: absolute;
  top: 50%;
  right: -24px;
  transform: translateY(-50%);
  box-shadow: 12px 16px 32px rgba(230, 0, 0, 0.25);
  animation: floatBox 6s ease-in-out infinite alternate;
}

@keyframes floatBox {
  0% { transform: translateY(-50%) rotate(0deg); }
  100% { transform: translateY(-58%) rotate(2deg); }
}

.swiss-card-info {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 24px;
  box-shadow: var(--card-shadow);
  border-left: 4px solid var(--swiss-red);
}

.speed-metric {
  font-size: 2.75rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: #000;
  line-height: 1;
  margin-bottom: 4px;
}

.speed-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

/* ================= Dynamic Node Status ================= */
.section-status {
  padding: 80px 0;
  background-color: #fafbfc;
  border-bottom: 1px solid var(--border-color);
}

.status-header-wrap {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 20px;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 18px;
}

.node-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
}

.node-card:hover {
  transform: translateY(-3px);
  border-color: #111111;
  box-shadow: var(--card-shadow-hover);
}

.node-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.0625rem;
}

.flag-emoji {
  font-size: 1.3rem;
}

.pulse-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.node-specs {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-top: 1px dashed var(--border-color);
  padding-top: 10px;
}

.node-ping {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #059669;
}

/* ================= Core Advantages ================= */
.section-features {
  padding: 100px 0;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
}

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

.feature-card {
  padding: 36px 32px;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  position: relative;
  transition: all var(--transition-smooth);
}

.feature-card:hover {
  border-color: #000;
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.feature-num {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--swiss-red);
  margin-bottom: 20px;
  display: inline-block;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.feature-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ================= Pricing Plans (Based on Image 2) ================= */
.section-pricing {
  padding: 100px 0;
  background-color: #fbfbfd;
  border-bottom: 1px solid var(--border-color);
}

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

.pricing-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.08);
}

.pricing-card.featured {
  border: 2px solid var(--accent-purple);
  box-shadow: 0 12px 36px rgba(79, 70, 229, 0.12);
}

.pricing-badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-purple);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 9999px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pricing-header {
  text-align: center;
  margin-bottom: 28px;
}

.pricing-name {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.pricing-cost {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: #000;
}

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

.pricing-features-list li {
  display: flex;
  justify-content: space-between;
  padding: 13px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.pricing-features-list li .label {
  color: var(--text-muted);
}

.pricing-features-list li .value {
  font-weight: 700;
  color: var(--text-primary);
  text-align: right;
}

.btn-subscribe {
  display: block;
  width: 100%;
  text-align: center;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn-subscribe-default {
  background-color: #ffffff;
  color: var(--accent-purple);
  border: 1px solid #d1d5db;
}

.btn-subscribe-default:hover {
  background-color: #f3f4f6;
  border-color: #9ca3af;
}

.btn-subscribe-primary {
  background-color: var(--accent-purple);
  color: #ffffff;
}

.btn-subscribe-primary:hover {
  background-color: #4338ca;
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
}

/* ================= 50 FAQ Section ================= */
.section-faq {
  padding: 100px 0;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
}

.faq-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 36px;
}

.faq-search-box {
  width: 100%;
  position: relative;
}

.faq-search-input {
  width: 100%;
  padding: 16px 20px 16px 48px;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  outline: none;
  transition: all var(--transition-fast);
}

.faq-search-input:focus {
  border-color: #000;
  background-color: #fff;
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.06);
}

.faq-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.faq-filter-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.faq-tab-btn {
  padding: 8px 18px;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.faq-tab-btn.active, .faq-tab-btn:hover {
  background-color: #000000;
  color: #ffffff;
  border-color: #000000;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item.active {
  border-color: #111111;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 24px;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  gap: 16px;
}

.faq-question:hover {
  color: var(--swiss-red);
}

.faq-icon-arrow {
  font-size: 1.25rem;
  transition: transform var(--transition-smooth);
}

.faq-item.active .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--swiss-red);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth);
  padding: 0 24px;
  background-color: #fafbfc;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--border-color);
}

/* ================= Tutorials & Knowledge Base ================= */
.section-tutorials {
  padding: 100px 0;
  background-color: #fafbfc;
  border-bottom: 1px solid var(--border-color);
}

.os-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.os-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  padding: 28px 22px;
  text-align: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.os-card:hover {
  transform: translateY(-4px);
  border-color: #000;
  box-shadow: var(--card-shadow);
}

.os-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.os-name {
  font-size: 1.125rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.os-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ================= 12 SEO Articles Grid ================= */
.section-articles {
  padding: 100px 0;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
}

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

.article-card {
  display: flex;
  flex-direction: column;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: #000;
  box-shadow: var(--card-shadow-hover);
}

.article-card-header {
  padding: 24px 24px 12px;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.article-card:hover .article-card-title {
  color: var(--swiss-red);
}

.article-card-body {
  padding: 0 24px 20px;
  flex-grow: 1;
}

.article-card-excerpt {
  font-size: 0.90625rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.article-card-footer {
  padding: 16px 24px;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  font-weight: 700;
}

.read-more-link {
  color: var(--swiss-red);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ================= Article Single Page Layout ================= */
.article-header {
  padding: 60px 0 40px;
  background-color: #fafbfc;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a:hover {
  color: var(--swiss-red);
}

.article-main-title {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding-bottom: 16px;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-body-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  padding: 60px 0 80px;
}

.article-content {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: #24292f;
}

.article-content h2 {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid #000;
}

.article-content h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin: 32px 0 14px;
  color: #111;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin-bottom: 24px;
  padding-left: 28px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 4px solid var(--swiss-red);
  background-color: #fafbfc;
  padding: 18px 24px;
  margin: 28px 0;
  font-style: italic;
  color: var(--text-secondary);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.9375rem;
}

.article-content th, .article-content td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.article-content th {
  background-color: var(--bg-secondary);
  font-weight: 700;
}

.article-callout-box {
  background: linear-gradient(135deg, #fff5f5 0%, #fff 100%);
  border: 1px solid rgba(230, 0, 0, 0.2);
  border-left: 6px solid var(--swiss-red);
  padding: 24px 28px;
  border-radius: var(--radius-sm);
  margin: 36px 0;
}

.article-callout-title {
  font-weight: 800;
  font-size: 1.125rem;
  margin-bottom: 8px;
  color: var(--swiss-red);
}

/* Sidebar TOC & Conversion */
.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  height: fit-content;
}

.sidebar-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 24px;
}

.sidebar-title {
  font-size: 1.0625rem;
  font-weight: 800;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: -0.01em;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: block;
}

.toc-link:hover {
  color: var(--swiss-red);
}

.sidebar-cta-card {
  background: #000000;
  color: #ffffff;
  border-radius: var(--radius-sm);
  padding: 28px 24px;
  text-align: center;
}

.sidebar-cta-card h4 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.sidebar-cta-card p {
  font-size: 0.875rem;
  color: #a0aec0;
  margin-bottom: 20px;
}

/* Prev Next Navigation */
.post-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 60px 0 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.post-nav-card {
  padding: 20px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.post-nav-card:hover {
  border-color: #000;
}

.post-nav-card.next {
  text-align: right;
}

.post-nav-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.post-nav-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ================= Sticky Bottom CTA Bar ================= */
.floating-cta-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: rgba(15, 17, 21, 0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px 24px;
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #ffffff;
  transform: translateY(100%);
  transition: transform var(--transition-smooth);
}

.floating-cta-bar.show {
  transform: translateY(0);
}

.floating-cta-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.floating-cta-title {
  font-weight: 800;
  font-size: 0.9375rem;
}

.floating-cta-desc {
  font-size: 0.8125rem;
  color: #9ca3af;
}

/* ================= Footer ================= */
.site-footer {
  background-color: #0a0a0a;
  color: #ffffff;
  padding: 80px 0 40px;
  border-top: 1px solid #222;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: #888888;
  font-size: 0.90625rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 360px;
}

.footer-heading {
  font-size: 0.9375rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 20px;
}

.footer-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link-list a {
  color: #888888;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-geo-box {
  background-color: #141414;
  border: 1px solid #222;
  padding: 16px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: #777;
  line-height: 1.6;
}

.footer-keywords-cloud {
  padding-top: 30px;
  margin-bottom: 40px;
  border-top: 1px solid #222;
}

.keywords-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.kw-tag {
  background-color: #161616;
  border: 1px solid #2a2a2a;
  color: #888;
  padding: 4px 10px;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.kw-tag:hover {
  color: #fff;
  border-color: var(--swiss-red);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid #1a1a1a;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: #666;
  flex-wrap: wrap;
  gap: 16px;
}

/* ================= Responsive Queries ================= */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .feature-grid, .pricing-grid, .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .os-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-body-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-heading {
    font-size: 2.75rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: #ffffff;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  }
  .nav-menu.show {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .feature-grid, .pricing-grid, .articles-grid, .os-grid {
    grid-template-columns: 1fr;
  }
  .hero-trust-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .post-pagination {
    grid-template-columns: 1fr;
  }
  .floating-cta-desc {
    display: none;
  }
}