/* ==========================================
   Sage Green Manual Style Design System
   鼠尾草绿服务手册风格 CSS
   ========================================== */

:root {
  --bg-main: #F5F8F1;
  --primary-color: #405B43;
  --secondary-color: #A6B596;
  --text-main: #27322A;
  --text-muted: #5A6D5E;
  --card-bg: #FFFFFF;
  --card-border: #DCE4D6;
  --tag-bg: #E8EFE5;
  --tag-text: #334A36;
  --accent-light: #F0F4EC;
  --warning-bg: #FFF8E7;
  --warning-border: #E8D49E;
  --warning-text: #7A5B10;
  
  --font-family: "Trebuchet MS", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow-sm: 0 2px 4px rgba(64, 91, 67, 0.05);
  --shadow-md: 0 4px 12px rgba(64, 91, 67, 0.08);
  --shadow-hover: 0 6px 16px rgba(64, 91, 67, 0.12);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: var(--line-height-base);
  font-size: 1rem;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--primary-color);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: 2.0625rem; /* 33px for mobile default */
  letter-spacing: -0.02em;
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3rem; /* 48px for desktop */
  }
}

h2 {
  font-size: 1.75rem; /* 28px */
  margin-top: 2rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--secondary-color);
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.35rem; /* 21.6px */
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-main);
}

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

a:hover, a:focus {
  color: #273A2A;
  text-decoration: underline;
}

/* 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;
  }
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 3rem 0;
}

@media (min-width: 768px) {
  .section {
    padding: 4.5rem 0;
  }
}

/* Header & Navigation */
.site-header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-color);
}

.brand-logo svg {
  width: 32px;
  height: 32px;
}

.nav-desktop {
  display: none;
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: 1.5rem;
  }
  
  .nav-desktop a {
    font-weight: 600;
    color: var(--text-main);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
  }
  
  .nav-desktop a:hover, .nav-desktop a:focus {
    background-color: var(--accent-light);
    color: var(--primary-color);
    text-decoration: none;
  }
}

.header-ctas {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Mobile Menu Toggle Button */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 2.25rem;
  height: 2.25rem;
  background: transparent;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.35rem;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition-fast);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-nav-drawer {
  display: none;
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-md);
}

.mobile-nav-drawer.active {
  display: block;
}

.mobile-nav-drawer a {
  display: block;
  padding: 0.75rem 0;
  font-size: 1.1rem;
  font-weight: 600;
  border-bottom: 1px dashed var(--card-border);
  color: var(--text-main);
}

.mobile-nav-drawer a:last-child {
  border-bottom: none;
}

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.btn:hover, .btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

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

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: #314734;
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--text-main) !important;
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background-color: #94A583;
}

.btn-outline {
  background-color: transparent;
  border-color: var(--primary-color);
  color: var(--primary-color) !important;
}

.btn-outline:hover, .btn-outline:focus-visible {
  background-color: var(--accent-light);
}

/* Hero Section Layout (Mobile First: text then manual panel; Desktop: narrow brand left, wider manual right) */
.hero-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}

@media (min-width: 1024px) {
  .hero-grid {
    display: grid;
    grid-template-columns: 5fr 7fr; /* Left narrow 5, Right wider 7 */
    align-items: center;
    gap: 2.5rem;
  }
}

.hero-brand-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  width: fit-content;
  border: 1px solid var(--secondary-color);
  animation: fadeIn 0.6s ease-out;
}

.hero-title {
  margin-bottom: 0.5rem;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

/* Wider Network Manual Panel */
.manual-panel {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

.manual-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px dashed var(--card-border);
  padding-bottom: 0.85rem;
  margin-bottom: 1.25rem;
}

.manual-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.manual-steps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.manual-step-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background-color: var(--bg-main);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background-color: var(--primary-color);
  color: #FFFFFF;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 1.05rem;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.step-content p {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Feature Cards / Wide List Items */
.wide-card-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.wide-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.card-tag {
  display: inline-block;
  background-color: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

/* Region Nodes Section */
.region-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .region-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .region-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.region-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.region-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
}

.region-flag {
  font-size: 1.5rem;
}

.region-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0;
}

.region-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.925rem;
}

.region-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
}

.region-list li::before {
  content: "•";
  color: var(--secondary-color);
  font-size: 1.2rem;
}

/* AI & Streaming Section */
.platform-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.platform-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.platform-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.disclaimer-box {
  background-color: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  margin-top: 1rem;
  font-weight: 600;
}

/* Pricing Section (Horizontal Hierarchical List Layout) */
.pricing-disclaimer-banner {
  background-color: var(--warning-bg);
  border: 2px dashed var(--warning-border);
  color: var(--warning-text);
  padding: 1rem;
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.pricing-list-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.pricing-tier-row {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.pricing-tier-row.recommended {
  border: 2px solid var(--primary-color);
  background-color: #FAFDF8;
}

.recommended-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background-color: var(--primary-color);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.75rem;
  border-radius: 12px;
}

@media (min-width: 768px) {
  .pricing-tier-row {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  
  .pricing-tier-left {
    flex: 2;
  }
  
  .pricing-tier-price {
    flex: 1;
    text-align: center;
  }
  
  .pricing-tier-action {
    flex: 1;
    display: flex;
    justify-content: flex-end;
  }
}

.tier-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);

}

.tier-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.tier-price-val {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
}

.tier-price-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Articles Section: Desktop 3 cols, Tablet 2 cols, Mobile 1 col */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.article-img-wrap {
  width: 100%;
  height: 180px;
  background-color: var(--accent-light);
  overflow: hidden;
}

.article-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

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

.article-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-grow: 1;
  margin-bottom: 1rem;
}

/* Reviews / Scenario Feedback */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .reviews-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.review-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-text {
  font-style: italic;
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.review-notice {
  font-size: 0.8rem;
  color: var(--text-muted);
  background-color: var(--tag-bg);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-block;
}

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

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

.faq-item summary {
  padding: 1.15rem 1.25rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--primary-color);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--secondary-color);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.25rem 1.25rem 1.25rem;
  color: var(--text-main);
  border-top: 1px dashed var(--card-border);
  padding-top: 1rem;
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Article Layout & Typography Specializations */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

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

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

.article-container {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .article-container {
    padding: 2.75rem;
  }
}

.article-hero-img {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.article-content {
  font-size: 1rem;
  line-height: 1.8;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

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

.article-content blockquote {
  border-left: 4px solid var(--secondary-color);
  background-color: var(--accent-light);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-style: italic;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.925rem;
}

.article-content th, .article-content td {
  border: 1px solid var(--card-border);
  padding: 0.75rem 1rem;
  text-align: left;
}

.article-content th {
  background-color: var(--accent-light);
  color: var(--primary-color);
  font-weight: 700;
}

.related-articles {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px dashed var(--card-border);
}

/* Footer Styling */
.site-footer {
  background-color: var(--primary-color);
  color: #E3EBE0;
  padding: 3rem 0 1.5rem 0;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.footer-col p {
  color: #C8D6C5;
  font-size: 0.9rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  color: #DDE6DB;
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: #B5C7B2;
}

/* Section Title Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-section {
  animation: fadeIn 0.5s ease-out forwards;
}