/* ==========================================================================
   FEIJICLOUD.CFD — 先锋纸媒杂志风 (Editorial Minimalist) Design System
   Color Palette: Warm Off-White Paper (#F4F1EA), Ink Charcoal (#1A1917), 
                  Muted Slate (#6B6862), Ivory Card (#FAF8F5), Ochre Gold (#A67C52)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --bg-paper: #F4F1EA;
  --bg-paper-alt: #EBE6DC;
  --card-bg: #FAF8F5;
  --card-hover: #FFFFFF;
  --text-main: #1A1917;
  --text-muted: #6A6760;
  --text-light: #949086;
  --border-color: #E2DDD4;
  --border-dark: #1A1917;
  --accent-ochre: #A67C52;
  --accent-burgundy: #6B2D2D;
  --accent-dark: #2B2A27;
  --shadow-subtle: 0 10px 30px rgba(26, 25, 23, 0.04);
  --shadow-hover: 0 20px 40px rgba(26, 25, 23, 0.08);
  --font-serif-en: 'Playfair Display', Georgia, serif;
  --font-serif-cn: 'Noto Serif SC', 'Songti SC', STSong, serif;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base Styling */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-paper);
  color: var(--text-main);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  line-height: 1.7;
  background-color: var(--bg-paper);
  overflow-x: hidden;
  position: relative;
  cursor: default;
}

/* Custom Cursor & Wing Trail Canvas */
#cursor-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

.custom-cursor {
  position: fixed;
  width: 12px;
  height: 12px;
  background: var(--text-main);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  transition: transform 0.1s ease-out, background-color 0.2s;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif-cn), var(--font-serif-en);
  color: var(--text-main);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
}

h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
}

p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
}

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

.editorial-tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-ochre);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.editorial-divider {
  width: 100%;
  height: 1px;
  background: var(--border-color);
  margin: 3rem 0;
  position: relative;
}

.editorial-divider::after {
  content: '❖';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-paper);
  padding: 0 1rem;
  color: var(--accent-ochre);
  font-size: 0.8rem;
}

.container {
  width: 90%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Magazine Grid Layout Helper */
.editorial-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
}

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

.editorial-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* Header & Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(244, 241, 234, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  padding: 1.25rem 0;
  transition: var(--transition-smooth);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo-text {
  font-family: var(--font-serif-en);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-sub {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent-ochre);
  border-left: 1px solid var(--border-color);
  padding-left: 0.75rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-main);
  letter-spacing: 0.05em;
  position: relative;
  padding: 0.3rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1px;
  background-color: var(--text-main);
  transition: width 0.3s ease;
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.8rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 0px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid var(--text-main);
}

.btn-primary {
  background-color: var(--text-main);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--accent-ochre);
  border-color: var(--accent-ochre);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(166, 124, 82, 0.25);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-main);
}

.btn-outline:hover {
  background-color: var(--text-main);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* Hero Section */
.hero {
  padding: 12rem 0 6rem 0;
  position: relative;
  border-bottom: 1px solid var(--border-color);
  background: radial-gradient(circle at 80% 20%, rgba(235, 230, 220, 0.6) 0%, transparent 60%);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-issue-badge {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-issue-badge span.dot {
  width: 6px;
  height: 6px;
  background-color: #27AE60;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 10px rgba(39, 174, 96, 0.6);
}

.hero-title {
  font-size: clamp(3rem, 5.5vw, 4.8rem);
  line-height: 1.1;
  margin-bottom: 2rem;
  font-family: var(--font-serif-cn);
  font-weight: 700;
  color: var(--text-main);
}

.hero-title em {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-weight: 400;
  color: var(--accent-ochre);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 650px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.hero-magazine-cover {
  position: relative;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
}

.hero-magazine-cover::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--text-main);
}

.magazine-meta {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.node-status-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 1.2rem 1.5rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-smooth);
}

.node-status-card:hover {
  transform: translateX(5px);
  border-color: var(--accent-ochre);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

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

.node-name {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
}

.node-ping {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: #27AE60;
  font-weight: 600;
  background: rgba(39, 174, 96, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
}

/* Feature Editorial Section */
.features-section {
  padding: 7rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 4.5rem auto;
}

.section-header h2 {
  margin-top: 0.5rem;
  margin-bottom: 1.2rem;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  position: relative;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  background: var(--card-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--text-main);
}

.feature-num {
  font-family: var(--font-serif-en);
  font-size: 3rem;
  color: var(--border-color);
  line-height: 1;
  margin-bottom: 1rem;
  font-style: italic;
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-num {
  color: var(--accent-ochre);
}

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.8rem;
}

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

/* Pricing & Filter Search Section */
.pricing-section {
  padding: 7rem 0;
  background-color: var(--bg-paper-alt);
  border-bottom: 1px solid var(--border-color);
}

.price-search-bar {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2rem;
  margin-bottom: 3.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
}

.search-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-width: 220px;
}

.search-field label {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--text-main);
}

.search-field select, .search-field input {
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  outline: none;
}

.search-field select:focus, .search-field input:focus {
  border-color: var(--text-main);
}

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

.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 3rem 2.2rem;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.pricing-card.featured {
  background: #FFFFFF;
  border: 2px solid var(--text-main);
  transform: scale(1.03);
  box-shadow: var(--shadow-hover);
}

.featured-tag {
  position: absolute;
  top: -14px;
  right: 2rem;
  background: var(--text-main);
  color: #FFFFFF;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.3rem 1rem;
}

.plan-name {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  min-height: 2.6em;
}

.plan-price {
  font-family: var(--font-serif-en);
  font-size: 3.2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.plan-price span {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin: 2rem 0;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.plan-features li {
  font-size: 0.92rem;
  color: var(--text-main);
  padding: 0.6rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px dashed var(--border-color);
}

.plan-features li::before {
  content: '✓';
  color: var(--accent-ochre);
  font-weight: bold;
}

/* Articles Section & Editorial Reader */
.articles-section {
  padding: 7rem 0;
  border-bottom: 1px solid var(--border-color);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.article-card:hover {
  background: #FFFFFF;
  border-color: var(--text-main);
  box-shadow: var(--shadow-hover);
}

.article-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.article-title {
  font-size: 1.5rem;
  line-height: 1.35;
  margin-bottom: 1rem;
}

.article-title a {
  color: var(--text-main);
}

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

.article-excerpt {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.8rem;
}

.article-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.kw-badge {
  font-size: 0.75rem;
  background: rgba(166, 124, 82, 0.1);
  color: var(--accent-ochre);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  font-weight: 500;
}

.read-more-link {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.read-more-link:hover {
  color: var(--accent-ochre);
  transform: translateX(4px);
}

/* Article Modal Reader */
.article-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(26, 25, 23, 0.75);
  backdrop-filter: blur(8px);
  z-index: 9000;
  display: none;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.article-modal.active {
  display: flex;
}

.article-modal-content {
  background: var(--bg-paper);
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 4rem 3.5rem;
  border: 1px solid var(--border-dark);
  position: relative;
  box-shadow: 0 25px 60px rgba(0,0,0,0.3);
}

.modal-close {
  position: absolute;
  top: 2rem;
  right: 2.5rem;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-main);
  background: none;
  border: none;
  line-height: 1;
}

.article-full-body {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-main);
}

.article-full-body h2 {
  margin: 2.5rem 0 1.2rem 0;
  font-size: 1.8rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.article-full-body h3 {
  margin: 1.8rem 0 0.8rem 0;
  font-size: 1.35rem;
}

.article-full-body p {
  margin-bottom: 1.4rem;
  color: #2C2B29;
}

.article-full-body blockquote {
  border-left: 3px solid var(--accent-ochre);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-family: var(--font-serif-cn);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--text-main);
}

.article-cta-box {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2rem;
  margin: 2.5rem 0;
  text-align: center;
}

.internal-link {
  color: var(--accent-ochre);
  font-weight: 600;
  text-decoration: underline;
  cursor: pointer;
}

.internal-link:hover {
  color: var(--text-main);
}

/* User Reviews / Testimonials Section */
.reviews-section {
  padding: 7rem 0;
  background-color: var(--bg-paper-alt);
  border-bottom: 1px solid var(--border-color);
}

.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.review-card:hover {
  background: #FFFFFF;
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-ochre);
}

.review-stars {
  color: #D4AF37;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.review-quote {
  font-family: var(--font-serif-cn);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-main);
  margin-bottom: 2rem;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.2rem;
}

.user-avatar {
  width: 44px;
  height: 44px;
  background: var(--text-main);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.user-meta-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.user-meta-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-section {
  padding: 7rem 0;
  border-bottom: 1px solid var(--border-color);
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.faq-question {
  padding: 1.8rem 2rem;
  font-family: var(--font-serif-cn);
  font-size: 1.2rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0, 1, 0, 1);
  padding: 0 2rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 2rem 1.8rem 2rem;
}

.faq-answer p {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Footer Section — PBN 权重精准输血管道 (核心任务 2) */
footer.editorial-footer {
  background-color: var(--accent-dark);
  color: #E2DDD4;
  padding: 5rem 0 3rem 0;
  text-align: center;
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  text-align: left;
  margin-bottom: 4rem;
  border-bottom: 1px solid rgba(226, 221, 212, 0.15);
  padding-bottom: 3.5rem;
}

.footer-brand h3 {
  color: #FFFFFF;
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: #A3A099;
  font-size: 0.92rem;
  max-width: 450px;
}

.footer-links-group h4 {
  color: #FFFFFF;
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
  font-family: var(--font-sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-links-group ul {
  list-style: none;
}

.footer-links-group ul li {
  margin-bottom: 0.6rem;
}

.footer-links-group ul li a {
  color: #A3A099;
  font-size: 0.88rem;
}

.footer-links-group ul li a:hover {
  color: #FFFFFF;
}

/* PBN 友情链接区 (低调、小字号、深度融入) */
.pbn-link-pipeline {
  border-top: 1px solid rgba(226, 221, 212, 0.1);
  padding-top: 2rem;
  margin-top: 2rem;
  text-align: center;
}

.pbn-title {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(226, 221, 212, 0.4);
  margin-bottom: 1rem;
}

.pbn-links-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem 1.8rem;
  max-width: 1000px;
  margin: 0 auto;
}

.pbn-link-item {
  font-size: 0.78rem;
  color: rgba(226, 221, 212, 0.55);
  transition: var(--transition-smooth);
}

.pbn-link-item:hover {
  color: var(--accent-ochre);
  text-decoration: underline;
}

.footer-copyright {
  margin-top: 2.5rem;
  font-size: 0.78rem;
  color: rgba(226, 221, 212, 0.4);
  letter-spacing: 0.05em;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .editorial-grid-4, .pricing-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .editorial-grid-2, .editorial-grid-3, .articles-grid {
    grid-template-columns: 1fr;
  }
  .pricing-cards {
    grid-template-columns: 1fr;
  }
  .price-search-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .article-modal-content {
    padding: 2.5rem 1.5rem;
  }
}