/* 山水云 Official Site & Knowledge Base - Main Stylesheet */
/* Color Palette: Lavender-gray creative studio */
:root {
  --bg-main: #F5F3F8;
  --bg-card: #FFFFFF;
  --text-dark: #353046;
  --text-muted: #82708F;
  --accent-purple: #5E4B75;
  --accent-hover: #48385C;
  --border-light: #E4DFEC;
  --shadow-soft: 0 10px 30px rgba(53, 48, 70, 0.05);
  --shadow-hover: 0 15px 35px rgba(53, 48, 70, 0.1);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-dark);
  font-size: 17px;
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-purple);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 56px;
  margin-bottom: 20px;
}

h2 {
  font-size: 32px;
  margin-bottom: 16px;
}

h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

p {
  margin-bottom: 16px;
  color: #4A4458;
}

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

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

/* Navigation Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(245, 243, 248, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
}

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

.logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.03em;
}

.logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.logo-badge {
  font-size: 12px;
  background: var(--accent-purple);
  color: #fff;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}

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

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  font-size: 15px;
}

.nav-link:hover {
  color: var(--accent-purple);
  text-decoration: none;
}

.header-cta {
  background-color: var(--accent-purple);
  color: #FFFFFF !important;
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.header-cta:hover {
  background-color: var(--accent-hover);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(94, 75, 117, 0.25);
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-dark);
}

.mobile-toggle svg {
  width: 28px;
  height: 28px;
}

/* Asymmetric Background Shapes */
.bg-shape-1 {
  position: absolute;
  top: -100px;
  right: -50px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(130, 112, 143, 0.12) 0%, rgba(245, 243, 248, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

.bg-shape-2 {
  position: absolute;
  top: 40%;
  left: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(94, 75, 117, 0.08) 0%, rgba(245, 243, 248, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}

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

.hero-tag {
  display: inline-block;
  background-color: #E8E3F0;
  color: var(--accent-purple);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 560px;
  line-height: 1.7;
}

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

.btn-primary {
  background-color: var(--accent-purple);
  color: #FFFFFF !important;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s ease;
  border: 1px solid transparent;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(94, 75, 117, 0.3);
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--text-dark) !important;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid var(--border-light);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background-color: #FAF8FC;
  border-color: var(--text-muted);
  text-decoration: none;
  transform: translateY(-2px);
}

/* Dashboard Panel Component */
.dashboard-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  position: relative;
}

.float-animated {
  animation: floatPanel 4s ease-in-out infinite alternate;
}

@keyframes floatPanel {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-4px); }
}

.dash-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 20px;
}

.dash-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dash-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: #388E3C;
  background-color: #E8F5E9;
  padding: 4px 10px;
  border-radius: 12px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #4CAF50;
}

.node-grid-mini {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.node-item-mini {
  background-color: #FAF9FC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.node-flag {
  font-size: 18px;
}

.node-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
}

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

.traffic-stat {
  background: linear-gradient(135deg, #FAF8FC 0%, #F1ECF7 100%);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.traffic-info label {
  font-size: 12px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.traffic-info span {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
}

/* Feature Cards Grid */
.section-padding {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 17px;
  margin-top: 12px;
}

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

.adv-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.3s ease;
}

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

.adv-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background-color: #F0ECF5;
  color: var(--accent-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

/* Vertical Use Cases Section */
.usecase-wrapper {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.usecase-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}

.usecase-sidebar {
  border-right: 1px solid var(--border-light);
  padding-right: 28px;
}

.usecase-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.usecase-desc {
  font-size: 15px;
  color: var(--text-muted);
}

.usecase-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.app-box {
  background-color: #FAF9FC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px;
}

.app-name {
  font-weight: 700;
  font-size: 16px;
  color: var(--text-dark);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-detail {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 1080px;
  margin: 0 auto;
}

.price-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.price-card.featured {
  border: 2px solid var(--accent-purple);
  box-shadow: var(--shadow-hover);
}

.badge-featured {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-purple);
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}

.price-title {
  font-size: 22px;
  margin-bottom: 8px;
}

.price-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.price-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin: 12px 0 20px;
  color: var(--text-dark);
}

.price-amount .currency {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent-purple);
}

.price-amount .value {
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.price-amount .period {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.price-placeholder-note {
  font-size: 13px;
  background-color: #F4F1F8;
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.price-features {
  list-style: none;
  text-align: left;
  margin-bottom: 32px;
}

.price-features li {
  font-size: 14px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.price-features li::before {
  content: "✓";
  color: var(--accent-purple);
  font-weight: bold;
}

/* Article Cards Grid (3 col desktop, 2 tablet, 1 mobile) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

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

.article-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  gap: 12px;
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

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

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

.article-excerpt {
  font-size: 14px;
  color: #554F65;
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-link {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Testimonials Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.testi-content {
  font-size: 15px;
  color: #4A4458;
  margin-bottom: 20px;
  font-style: italic;
  line-height: 1.6;
}

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

.avatar-placeholder {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: #E8E2F0;
  color: var(--accent-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

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

.author-info p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* FAQ Accordion */
.faq-container {
  max-width: 840px;
  margin: 0 auto;
}

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

.faq-header {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  background: none;
  border: none;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  background-color: #FAF9FC;
}

.faq-item.active .faq-body {
  max-height: 500px;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--border-light);
}

.faq-body p {
  font-size: 15px;
  margin-bottom: 10px;
}

.faq-body p:last-child {
  margin-bottom: 0;
}

/* Footer Section */
.site-footer {
  background-color: #2E293D;
  color: #D3CCE0;
  padding: 60px 0 30px;
  margin-top: auto;
}

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

.footer-brand h3 {
  color: #FFFFFF;
  font-size: 22px;
  margin-bottom: 14px;
}

.footer-brand p {
  color: #B2A7C4;
  font-size: 14px;
  max-width: 320px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 16px;
  margin-bottom: 18px;
}

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

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

.footer-links a {
  color: #B2A7C4;
  font-size: 14px;
}

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

.natural-links-box {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.natural-links-box h4 {
  margin-bottom: 12px;
}

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

.natural-links-list li {
  margin-bottom: 8px;
}

.natural-links-list a {
  color: #D3CCE0;
  font-size: 14px;
  font-weight: 500;

}

.natural-links-list a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #978CAE;
}

/* Article Template Styles */
.article-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 40px;
}

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

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

.breadcrumb a:hover {
  color: var(--accent-purple);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  margin-bottom: 60px;
}

.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: #3B354A;
}

.article-content h2 {
  font-size: 26px;
  margin-top: 40px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.article-content h3 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 14px;
}

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

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

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

.article-content blockquote {
  background-color: #FAF8FC;
  border-left: 4px solid var(--accent-purple);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.sidebar-box h3 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.related-articles-list {
  list-style: none;
}

.related-articles-list li {
  margin-bottom: 14px;
}

.related-articles-list a {
  font-size: 14px;
  color: var(--text-dark);
  font-weight: 500;
  display: block;
  line-height: 1.4;
}

.related-articles-list a:hover {
  color: var(--accent-purple);
}

.sidebar-cta-card {
  background: linear-gradient(135deg, var(--accent-purple) 0%, #48385C 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}

.sidebar-cta-card h4 {
  color: #fff;
  font-size: 18px;
  margin-bottom: 10px;
}

.sidebar-cta-card p {
  color: #E2DBEC;
  font-size: 13px;
  margin-bottom: 20px;
}

.sidebar-cta-btn {
  background-color: #FFFFFF;
  color: var(--accent-purple) !important;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 20px;
  display: inline-block;
  font-size: 14px;
}

.sidebar-cta-btn:hover {
  background-color: #F5F3F8;
  text-decoration: none;
}

/* Static Page Content Layout */
.static-page-header {
  padding: 40px 0 20px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 40px;
}

.static-content-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 60px;
}

/* Media Queries for Responsive Design */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .usecase-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .usecase-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-right: 0;
    padding-bottom: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 26px;
  }

  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    background-color: var(--bg-card);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .advantages-grid, .pricing-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }

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

  .usecase-list {
    grid-template-columns: 1fr;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .node-grid-mini {
    grid-template-columns: 1fr;
  }

  /* Disable float animation on mobile screens per prompt requirement */
  .float-animated {
    animation: none !important;
  }
}

@media (max-width: 480px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn-primary, .hero-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .static-content-box {
    padding: 24px;
  }
}

/* Accessibility / Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .float-animated {
    animation: none !important;
  }
  
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}