/* ==========================================
   SWISS MONOCHROME DESIGN SYSTEM
   Colors: White #FFFFFF, Black #181B1D, Light Gray #EEF0EF, Muted Red #A95D58
   Typography: Bold Chinese Sans Headings, Regular Sans Body, Monospace Labels
   Corners: Square (0px)
   ========================================== */

:root {
  --color-white: #FFFFFF;
  --color-black: #181B1D;
  --color-gray-bg: #EEF0EF;
  --color-gray-border: #D1D5D3;
  --color-gray-muted: #666666;
  --color-red-muted: #A95D58;

  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: SFMono-Regular, Consolas, "Liberation Mono", Menlo, Courier, monospace;

  --max-width: 1280px;
  --header-height: 72px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* Enforce Swiss Poster square corners */
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-white);
  color: var(--color-black);
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  background-color: var(--color-white);
  color: var(--color-black);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Swiss Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-black);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 4.375rem; /* 70px on desktop */
  text-transform: uppercase;
}

h2 {
  font-size: 2.25rem; /* 36px */
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.35rem; /* 21.6px */
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
}

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

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-muted);
}

.tag-red {
  display: inline-block;
  background-color: var(--color-red-muted);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  text-transform: uppercase;
  font-weight: 600;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-padding {
  padding: 5rem 0;
  border-bottom: 1px solid var(--color-gray-border);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.875rem 1.75rem;
  border: 2px solid var(--color-black);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-red-muted);
  border-color: var(--color-red-muted);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-black);
}

.btn-secondary:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn-red {
  background-color: var(--color-red-muted);
  color: var(--color-white);
  border-color: var(--color-red-muted);
}

.btn-red:hover {
  background-color: var(--color-black);
  border-color: var(--color-black);
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-black);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

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

.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-badge {
  background-color: var(--color-red-muted);
  color: var(--color-white);
  font-size: 0.75rem;
  padding: 0.1rem 0.4rem;
  font-family: var(--font-mono);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  border-bottom-color: var(--color-red-muted);
  color: var(--color-red-muted);
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-black);
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  cursor: pointer;
}

.mobile-menu {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  border-bottom: 2px solid var(--color-black);
  padding: 1.5rem;
  flex-direction: column;
  gap: 1rem;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu .nav-link {
  font-size: 1.125rem;
  padding: 0.5rem 0;
}

/* Hero Section */
.hero {
  padding: 4rem 0 5rem 0;
  border-bottom: 2px solid var(--color-black);
  background-color: var(--color-white);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.hero-statement {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-h1 {
  font-size: 4.375rem;
  line-height: 1.05;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--color-black);
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero Network Dashboard (Right) */
.dashboard-box {
  border: 2px solid var(--color-black);
  background-color: var(--color-gray-bg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-gray-border);
  padding-bottom: 0.75rem;
}

.dashboard-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-red-muted);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.dashboard-card {
  border: 1px solid var(--color-black);
  background-color: var(--color-white);
  padding: 1rem;
}

.dashboard-card-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gray-muted);
  margin-bottom: 0.25rem;
}

.dashboard-card-value {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.dashboard-svg-container {
  border: 1px solid var(--color-black);
  background-color: var(--color-white);
  padding: 1rem;
}

.animated-line {
  stroke: var(--color-red-muted);
  stroke-width: 2;
  stroke-dasharray: 600;
  stroke-dashoffset: 0;
  animation: lineGrow 3s ease-out forwards;
}

@keyframes lineGrow {
  from { stroke-dashoffset: 600; }
  to { stroke-dashoffset: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .animated-line {
    animation: none !important;
    stroke-dashoffset: 0 !important;
  }
}

.dashboard-disclaimer {
  font-size: 0.75rem;
  color: var(--color-gray-muted);
  line-height: 1.4;
  border-top: 1px solid var(--color-gray-border);
  padding-top: 0.75rem;
}

/* Advantages Section */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.advantage-card {
  border: 1px solid var(--color-black);
  padding: 2rem;
  background-color: var(--color-white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.advantage-num {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-red-muted);
  line-height: 1;
  margin-bottom: 1rem;
}

/* Global Nodes Directory */
.nodes-section {
  background-color: var(--color-gray-bg);
}

.nodes-directory {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.node-group {
  border: 1px solid var(--color-black);
  background-color: var(--color-white);
  padding: 1.5rem;
}

.node-group-header {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
}

.node-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.node-item {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed var(--color-gray-border);
  padding-bottom: 0.25rem;
}

.node-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gray-muted);
}

/* AI & Streaming Editorial Spreads */
.spread-box {
  border: 2px solid var(--color-black);
  padding: 3rem;
  margin-top: 2rem;
  background-color: var(--color-white);
}

.spread-box-alt {
  background-color: var(--color-gray-bg);
}

.spread-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.services-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.service-tag {
  border: 1px solid var(--color-black);
  background-color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.3rem 0.6rem;
  font-weight: 600;
}

.spread-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.scenario-card {
  border: 1px solid var(--color-black);
  padding: 1.5rem;
  background-color: var(--color-white);
}

.scenario-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--color-black);
}

/* Pricing Tiers */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  align-items: stretch;
  margin-top: 2rem;
}

.pricing-card {
  border: 1px solid var(--color-black);
  background-color: var(--color-white);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card.recommended {
  border: 3px solid var(--color-red-muted);
  background-color: #FFFDFD;
}

.recommended-badge {
  position: absolute;
  top: -14px;
  right: 1.5rem;
  background-color: var(--color-red-muted);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  text-transform: uppercase;
}

.pricing-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  margin: 1rem 0;
  color: var(--color-black);
}

.pricing-features {
  list-style: none;
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.9375rem;
  border-top: 1px solid var(--color-gray-border);
  padding-top: 1rem;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.pricing-features li::before {
  content: "■";
  color: var(--color-red-muted);
  font-size: 0.75rem;
  margin-top: 0.2rem;
}

/* Article Cards Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.article-card {
  border: 1px solid var(--color-black);
  background-color: var(--color-white);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.article-card:hover {
  border-color: var(--color-red-muted);
}

.article-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.article-index {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-red-muted);
}

.article-card-title {
  font-size: 1.25rem;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.article-card-desc {
  font-size: 0.9375rem;
  color: var(--color-gray-muted);
  margin-bottom: 1.5rem;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.testimonial-card {
  border: 1px solid var(--color-black);
  background-color: var(--color-gray-bg);
  padding: 1.75rem;
}

.testimonial-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-gray-border);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.testimonial-author {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
}

.testimonial-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--color-white);
  border: 1px solid var(--color-black);
  padding: 0.1rem 0.4rem;
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.faq-item {
  border: 1px solid var(--color-black);
  background-color: var(--color-white);
}

.faq-question {
  width: 100%;
  padding: 1.25rem;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-red-muted);
  transition: transform 0.2s ease;
}

.faq-answer {
  padding: 0 1.25rem 1.25rem 1.25rem;
  display: none;
  font-size: 0.9375rem;
  color: var(--color-black);
  border-top: 1px dashed var(--color-gray-border);
  padding-top: 1rem;
}

.faq-item.open .faq-answer {
  display: block;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

/* Footer */
.footer {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: 4rem 0 2rem 0;
  border-top: 3px solid var(--color-red-muted);
}

.footer h3, .footer h4 {
  color: var(--color-white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col-desc {
  font-size: 0.9375rem;
  color: #CCCCCC;
  margin-top: 1rem;
  max-width: 360px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9375rem;
}

.footer-links a {
  color: #CCCCCC;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #333333;
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #888888;
}

/* Article Page Layout */
.article-header {
  padding: 3rem 0 2rem 0;
  border-bottom: 2px solid var(--color-black);
  background-color: var(--color-gray-bg);
}

.breadcrumb {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--color-gray-muted);
}

.breadcrumb a:hover {
  color: var(--color-black);
  text-decoration: underline;
}

.breadcrumb span {
  color: var(--color-gray-muted);
}

.article-content {
  padding: 3rem 0;
  max-width: 840px;
  margin: 0 auto;
}

.article-body h2 {
  margin-top: 2.5rem;
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 0.5rem;
}

.article-body h3 {
  margin-top: 1.75rem;
}

.article-body ul, .article-body ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body code {
  font-family: var(--font-mono);
  background-color: var(--color-gray-bg);
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--color-gray-border);
  font-size: 0.875rem;
}

.article-body pre {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.related-articles {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 2px solid var(--color-black);
}

/* Responsive Rules */
@media (max-width: 1024px) {
  h1 { font-size: 3.5rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .advantages-grid { grid-template-columns: 1fr; }
  .nodes-directory { grid-template-columns: repeat(2, 1fr); }
  .spread-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  h1, .hero-h1 { font-size: 2.5rem; } /* 40px mobile */
  h2 { font-size: 1.75rem; }
  .nav-desktop { display: none; }
  .mobile-toggle { display: block; }
  .nodes-directory { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; align-items: flex-start; }
  .spread-box { padding: 1.5rem; }
}