/* 
 * 山水云 官方网站与知识库样式表 
 * Visual Style: Sand-and-muted-gold boutique technology
 * Background: #F7F2E8 | Text: #302B24 | Muted Gold: #AD8D53 | Off-White: #FDFBF6
 */

:root {
  --bg-sand: #F7F2E8;
  --bg-card: #FDFBF6;
  --bg-card-hover: #FFFFFF;
  --bg-panel: #F2ECE0;
  
  --text-dark: #302B24;
  --text-muted: #6B6255;
  --text-light: #948A7A;
  
  --gold-primary: #AD8D53;
  --gold-hover: #94753D;
  --gold-light: rgba(173, 141, 83, 0.12);
  --gold-border: rgba(173, 141, 83, 0.28);
  --gold-glow: rgba(173, 141, 83, 0.08);
  
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "Georgia", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  
  --shadow-subtle: 0 4px 20px rgba(48, 43, 36, 0.04);
  --shadow-lift: 0 8px 30px rgba(173, 141, 83, 0.12);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

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

body {
  background-color: var(--bg-sand);
  color: var(--text-dark);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

@media (max-width: 768px) {
  body {
    font-size: 16px;
  }
}

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

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

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

h1 {
  font-size: 62px;
  margin-bottom: 24px;
}

@media (max-width: 768px) {
  h1 {
    font-size: 37px;
    margin-bottom: 18px;
  }
}

h2 {
  font-size: 34px;
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  h2 {
    font-size: 26px;
  }
}

h3 {
  font-size: 22px;
  margin-bottom: 14px;
}

@media (max-width: 768px) {
  h3 {
    font-size: 19px;
  }
}

p {
  margin-bottom: 16px;
  color: var(--text-muted);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
}

.section {
  padding: 80px 0;
  position: relative;
}

@media (max-width: 768px) {
  .section {
    padding: 50px 0;
  }
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px auto;
}

@media (max-width: 768px) {
  .section-header {
    margin-bottom: 36px;
  }
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  background-color: var(--gold-light);
  border: 1px solid var(--gold-border);
  color: var(--gold-hover);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 50px;
  margin-bottom: 16px;
}

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-align: center;
  gap: 8px;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--text-dark);
  color: var(--bg-card);
  border-color: var(--text-dark);
  box-shadow: 0 4px 14px rgba(48, 43, 36, 0.15);
}

.btn-primary:hover {
  background-color: var(--gold-primary);
  border-color: var(--gold-primary);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-dark);
  border-color: var(--gold-border);
}

.btn-secondary:hover {
  background-color: var(--gold-light);
  border-color: var(--gold-primary);
  transform: translateY(-2px);
}

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

.btn-gold:hover {
  background-color: var(--gold-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.btn-full {
  width: 100%;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(247, 242, 232, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gold-border);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-logo .dot {
  width: 8px;
  height: 8px;
  background-color: var(--gold-primary);
  border-radius: 50%;
  display: inline-block;
}

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

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 4px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-dark);
}

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

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

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

.hamburger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-dark);
}

.hamburger-btn svg {
  width: 26px;
  height: 26px;
}

@media (max-width: 992px) {
  .hamburger-btn {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--gold-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 18px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    display: none;
  }
  
  .nav-menu.is-active {
    display: flex;
  }
  
  .nav-actions {
    display: none;
  }
  
  .nav-menu .nav-actions-mobile {
    display: block;
    width: 100%;
    margin-top: 12px;
  }
}

/* Ambient Glow & Background Accents */
.ambient-glow {
  position: absolute;
  top: -150px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--gold-glow) 0%, rgba(247, 242, 232, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 80px 0 100px 0;
  overflow: hidden;
}

@media (max-width: 768px) {
  .hero-section {
    padding: 40px 0 60px 0;
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.hero-text {
  position: relative;
  z-index: 1;
}

.hero-intro {
  font-size: 19px;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 580px;
  line-height: 1.8;
}

@media (max-width: 768px) {
  .hero-intro {
    font-size: 17px;
    margin-bottom: 24px;
  }
}

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

/* Network Dashboard Mockup */
.dashboard-card {
  background-color: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-subtle);
  position: relative;
  z-index: 1;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.dashboard-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(173, 141, 83, 0.15);
  margin-bottom: 20px;
}

.dashboard-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-indicator {
  width: 9px;
  height: 9px;
  background-color: #52C41A;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px rgba(82, 196, 26, 0.4);
}

.dashboard-tag {
  font-size: 12px;
  background: var(--gold-light);
  color: var(--gold-hover);
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 500;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--bg-sand);
  border: 1px solid rgba(173, 141, 83, 0.15);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.node-item:hover {
  border-color: var(--gold-primary);
}

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

.node-flag {
  font-size: 18px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gold-border);
}

.node-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
}

.node-type {
  font-size: 12px;
  color: var(--text-muted);
}

.node-status {
  font-size: 13px;
  font-weight: 500;
  color: var(--gold-primary);
  background: var(--bg-card);
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--gold-border);
}

/* Feature Cards / Benefits */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 992px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: var(--gold-primary);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background-color: var(--gold-light);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--gold-primary);
}

.feature-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 15px;
  line-height: 1.7;
}

/* Full-width Panels & Scenarios */
.panel-box {
  background: var(--bg-panel);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .panel-box {
    padding: 28px 20px;
  }
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}

@media (max-width: 768px) {
  .scenario-grid {
    grid-template-columns: 1fr;
  }
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: transform var(--transition-normal);
}

.scenario-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-subtle);
}

.scenario-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--gold-primary);
  background: var(--gold-light);
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tool-tag {
  background: var(--bg-sand);
  border: 1px solid rgba(173, 141, 83, 0.2);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 13px;
  color: var(--text-dark);
  font-weight: 500;
}

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

@media (max-width: 992px) {
  .pricing-grid {
    grid-template-columns: repeat(1, 1fr);
    max-width: 480px;
    margin: 0 auto;
  }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.pricing-card.featured {
  border: 2px solid var(--gold-primary);
  background: #FFFFFF;
}

.pricing-card.featured::before {
  content: "最受欢迎";
  position: absolute;
  top: -14px;
  right: 24px;
  background: var(--gold-primary);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 50px;
}

.pricing-header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gold-border);
}

.pricing-name {
  font-size: 22px;
  margin-bottom: 8px;
}

.pricing-price {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--gold-primary);
  margin-bottom: 8px;
}

.pricing-placeholder-note {
  font-size: 12px;
  color: var(--text-light);
  font-style: italic;
}

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

.pricing-features li {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li svg {
  width: 16px;
  height: 16px;
  color: var(--gold-primary);
  flex-shrink: 0;
}

/* SEO Article Cards (3/2/1 Columns) */
.articles-section {
  padding-top: 60px;
}

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

@media (max-width: 992px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: var(--gold-primary);
}

.article-category {
  font-size: 12px;
  font-weight: 600;
  color: var(--gold-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.article-card-title {
  font-size: 18px;
  margin-bottom: 12px;
  line-height: 1.4;
}

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

.article-card-title a:hover {
  color: var(--gold-primary);
}

.article-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-light);
  border-top: 1px solid rgba(173, 141, 83, 0.15);
  padding-top: 14px;
}

/* Testimonials */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 992px) {
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.testimonial-quote {
  font-size: 15px;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-placeholder {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gold-light);
  border: 1px solid var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--gold-primary);
  font-size: 15px;
}

.author-info h4 {
  font-size: 15px;
  margin-bottom: 2px;
}

.author-info p {
  font-size: 12px;
  margin-bottom: 0;
  color: var(--text-light);
}

/* FAQ Accordion */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--gold-primary);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
  color: var(--gold-primary);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
  padding: 0 24px;
}

.faq-item.is-open .faq-answer {
  max-height: 500px;
  padding: 0 24px 22px 24px;
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}

/* Article Page Specifics */
.article-header {
  padding: 40px 0 30px 0;
  border-bottom: 1px solid var(--gold-border);
  margin-bottom: 40px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-muted);
}

.breadcrumbs a:hover {
  color: var(--gold-primary);
}

.article-content {
  max-width: 820px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-dark);
}

.article-content h2 {
  font-size: 28px;
  margin: 40px 0 20px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--gold-border);
}

.article-content h3 {
  font-size: 21px;
  margin: 28px 0 14px 0;
}

.article-content p {
  margin-bottom: 20px;
  color: #3D372E;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
  color: #3D372E;
}

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

.article-content blockquote {
  background: var(--bg-panel);
  border-left: 4px solid var(--gold-primary);
  padding: 18px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}

.article-content code {
  background: var(--bg-panel);
  padding: 3px 8px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 14px;
  color: var(--gold-hover);
}

.article-content pre {
  background: #28241E;
  color: #FDFBF6;
  padding: 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 24px 0;
}

.article-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.related-articles {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--gold-border);
}

/* Footer */
.site-footer {
  background-color: var(--bg-panel);
  border-top: 1px solid var(--gold-border);
  padding: 60px 0 30px 0;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  font-size: 14px;
  max-width: 320px;
  margin-top: 12px;
}

.footer-heading {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-dark);
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--gold-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(173, 141, 83, 0.15);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-light);
  flex-wrap: wrap;
  gap: 16px;
}

/* Refined external recommendation styling */
.recommendation-list {
  list-style: none;
}

.recommendation-list li {
  margin-bottom: 10px;
  font-size: 14px;
}

.recommendation-list a {
  color: var(--gold-hover);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.recommendation-list a:hover {
  color: var(--text-dark);
  text-decoration: underline;
}

/* Accessibility: prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .dashboard-card:hover,
  .feature-card:hover,
  .scenario-card:hover,
  .pricing-card:hover,
  .article-card:hover,
  .btn:hover {
    transform: none !important;
  }
}