/* ==========================================================================
   一云梯 (yiyunt.lol) - Light Claymorphic Theme & Modern Dashboard CSS
   ========================================================================== */

:root {
  /* Fluent Acrylic & Depth Dark Theme Palette (Inspired by Image 1 & Image 2) */
  --bg-main: #0b1120;
  --bg-gradient: radial-gradient(circle at 15% 15%, #1e1b4b 0%, #0f172a 40%, #090d16 100%);
  
  --acrylic-bg: rgba(255, 255, 255, 0.07);
  --acrylic-card-bg: rgba(30, 41, 59, 0.65);
  --acrylic-blur: blur(20px);
  --fluent-border: 1px solid rgba(255, 255, 255, 0.12);
  --fluent-border-hover: 1px solid rgba(0, 168, 255, 0.5);
  
  --fluent-shadow: 0 20px 40px rgba(0, 0, 0, 0.45), 0 0 1px rgba(255, 255, 255, 0.1) inset;
  --fluent-shadow-hover: 0 25px 50px rgba(0, 150, 255, 0.25), 0 0 20px rgba(0, 212, 255, 0.2);
  
  --primary-color: #0078d4;
  --primary-gradient: linear-gradient(135deg, #0078d4 0%, #00c6ff 100%);
  --secondary-color: #7000ff;
  --secondary-gradient: linear-gradient(135deg, #8b5cf6 0%, #d946ef 100%);
  --accent-cyan: #00f2fe;
  --accent-cyan-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  
  --border-radius-lg: 20px;
  --border-radius-md: 14px;
  --border-radius-sm: 10px;
  --border-radius-pill: 50px;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  color: var(--text-main);
  background: var(--bg-main);
  min-height: 100vh;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  background: var(--bg-gradient);
  background-attachment: fixed;
  position: relative;
}

/* Dynamic Ambient Glow Blobs for Visual Excitement */
body::before, body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  z-index: 0;
  pointer-events: none;
  animation: floatGlow 14s infinite alternate ease-in-out;
}

body::before {
  width: 500px;
  height: 500px;
  background: rgba(0, 120, 212, 0.22);
  top: -100px;
  left: -100px;
}

body::after {
  width: 600px;
  height: 600px;
  background: rgba(124, 58, 237, 0.18);
  bottom: 10%;
  right: -150px;
  animation-delay: -7s;
}

@keyframes floatGlow {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 80px) scale(1.15); }
  100% { transform: translate(-40px, 120px) scale(0.9); }
}

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

ul {
  list-style: none;
}

/* Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Clay Card Style */
/* Acrylic Fluent Card Style */
.clay-card {
  background: var(--acrylic-card-bg);
  backdrop-filter: var(--acrylic-blur);
  -webkit-backdrop-filter: var(--acrylic-blur);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--fluent-shadow);
  border: var(--fluent-border);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border var(--transition-normal);
}

.clay-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--fluent-shadow-hover);
  border: var(--fluent-border-hover);
}

.clay-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--border-radius-pill);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.clay-btn-primary {
  background: var(--accent-cyan-gradient);
  color: #090d16;
  box-shadow: 0 8px 24px rgba(0, 242, 254, 0.35);
}

.clay-btn-primary:hover {
  transform: scale(1.04);
  box-shadow: 0 12px 32px rgba(0, 242, 254, 0.55);
}

.clay-btn-secondary {
  background: var(--secondary-gradient);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.35);
}

.clay-btn-secondary:hover {
  transform: scale(1.04);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.55);
}

.clay-btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.clay-btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* Header & Navbar Dark Acrylic */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 14px 0;
  background: rgba(11, 17, 32, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.pricing-section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 50px;
  font-size: 1.05rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.pricing-card {
  padding: 36px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
}

.pricing-card.recommended {
  border: 1px solid rgba(139, 92, 246, 0.6);
  background: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.15) 0%, rgba(15, 23, 42, 0.8) 100%);
  box-shadow: 0 0 35px rgba(139, 92, 246, 0.25);
  transform: translateY(-8px);
}

.pricing-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: #eab308;
  color: #0f172a;
  padding: 4px 12px;
  border-radius: var(--border-radius-pill);
  font-size: 0.75rem;
  font-weight: bold;
}

.pricing-badge.entry {
  background: rgba(255, 255, 255, 0.15);
  color: #cbd5e1;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-main);
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

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

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 30px;
}

.plan-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: #e2e8f0;
}

.plan-feature-icon {
  color: #00f2fe;
  font-weight: bold;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
}

.logo-badge {
  background: var(--primary-gradient);
  color: white;
  padding: 4px 10px;
  border-radius: var(--border-radius-pill);
  font-size: 0.75rem;
  box-shadow: 2px 2px 6px rgba(255, 51, 119, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-weight: 600;
  padding: 10px 14px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-color);
  background: rgba(255, 51, 119, 0.08);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 240px;
  padding: 12px;
  background: #ffffff;
  border-radius: var(--border-radius-md);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: 10px 14px;
  border-radius: var(--border-radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: rgba(255, 51, 119, 0.06);
  color: var(--primary-color);
}

/* Header Search & Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-trigger {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 4px 4px 10px rgba(180, 190, 210, 0.3), -4px -4px 10px #ffffff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.search-trigger:hover {
  transform: scale(1.1);
  color: var(--primary-color);
}

/* Search Modal Overlay */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 100px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 2000;
}

.search-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.search-box {
  width: 90%;
  max-width: 680px;
  background: #ffffff;
  border-radius: var(--border-radius-lg);
  padding: 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  position: relative;
  transform: translateY(-20px);
  transition: transform var(--transition-fast);
}

.search-modal.active .search-box {
  transform: translateY(0);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #f4f6fa;
  padding: 14px 20px;
  border-radius: var(--border-radius-md);
  margin-bottom: 20px;
}

.search-input-wrapper input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 1.1rem;
  width: 100%;
  color: var(--text-main);
}

.hot-searches-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.hot-search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.hot-tag {
  padding: 8px 16px;
  background: rgba(255, 51, 119, 0.08);
  color: var(--primary-color);
  border-radius: var(--border-radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hot-tag:hover {
  background: var(--primary-color);
  color: white;
}

/* Hero & Dashboard Preview Section */
.hero-section {
  padding: 60px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.8rem;
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #2b2d42 0%, #ff3377 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.hero-tag {
  background: #ffffff;
  padding: 6px 14px;
  border-radius: var(--border-radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: #4a5568;
  box-shadow: 2px 2px 6px rgba(180, 190, 210, 0.25);
}

/* Dashboard Mockup Component */
.dashboard-preview {
  padding: 24px;
  position: relative;
}

.dash-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(220, 225, 235, 0.6);
  padding-bottom: 14px;
  margin-bottom: 20px;
}

.dash-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dash-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.traffic-chart {
  background: #ffffff;
  border-radius: var(--border-radius-md);
  padding: 16px;
  margin-bottom: 20px;
  box-shadow: var(--clay-shadow-inset);
}

.chart-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.chart-bar-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 100px;
  padding-top: 10px;
}

.chart-bar {
  flex: 1;
  background: var(--primary-gradient);
  border-radius: 6px 6px 0 0;
  position: relative;
  transition: height 0.5s ease;
}

.chart-bar::after {
  content: attr(data-val);
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  font-weight: bold;
  color: var(--text-main);
}

.node-list-mini {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #ffffff;
  border-radius: var(--border-radius-sm);
  box-shadow: 2px 2px 6px rgba(180, 190, 210, 0.15);
  font-size: 0.88rem;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

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

.node-ping {
  color: #10b981;
  font-weight: bold;
  font-size: 0.82rem;
}

.node-multiplier {
  background: #e0e7ff;
  color: #4338ca;
  padding: 2px 8px;
  border-radius: var(--border-radius-pill);
  font-size: 0.75rem;
}

/* Pricing Section (Light Clay Cards) */
.pricing-section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 50px;
  font-size: 1.05rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.pricing-card {
  padding: 36px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pricing-card.recommended {
  border: 2px solid rgba(255, 51, 119, 0.4);
  transform: translateY(-10px);
}

.pricing-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: #ffaa00;
  color: #ffffff;
  padding: 4px 12px;
  border-radius: var(--border-radius-pill);
  font-size: 0.75rem;
  font-weight: bold;
}

.pricing-badge.entry {
  background: #64748b;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

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

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(220, 225, 235, 0.6);
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 30px;
}

.plan-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.plan-feature-icon {
  color: var(--primary-color);
  font-weight: bold;
}

/* Quick Setup Section */
.quick-setup-section {
  padding: 60px 0;
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  padding: 24px;
  text-align: center;
  cursor: pointer;
}

.client-icon {
  font-size: 2.5rem;
  margin-bottom: 14px;
}

.client-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.client-os {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* FAQ Accordion Section */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border-radius: var(--border-radius-md);
  box-shadow: 4px 4px 12px rgba(180, 190, 210, 0.25);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  display: none;
}

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

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

.faq-icon {
  transition: transform var(--transition-fast);
}

/* Articles Section Grid */
.articles-section {
  padding: 80px 0;
}

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

.article-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-category {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(112, 0, 255, 0.08);
  color: var(--secondary-color);
  border-radius: var(--border-radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  width: fit-content;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-light);
  border-top: 1px solid rgba(220, 225, 235, 0.6);
  padding-top: 12px;
}

/* Footer */
.site-footer {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px);
  padding: 60px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.8);
  margin-top: 60px;
}

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

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 320px;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
  padding-top: 20px;
  border-top: 1px solid rgba(220, 225, 235, 0.6);
}

/* Article View Modal / Page styling */
.article-detail-container {
  max-width: 840px;
  margin: 40px auto 80px;
  background: #ffffff;
  padding: 48px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--clay-shadow);
}

.article-header {
  margin-bottom: 32px;
  border-bottom: 1px solid #e2e8f0;
  padding-bottom: 24px;
}

.article-header h1 {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.3;
  margin-top: 12px;
  margin-bottom: 16px;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--text-main);
  border-left: 4px solid var(--primary-color);
  padding-left: 12px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 24px 0 12px;
  color: var(--text-main);
}

.article-body p {
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

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

.article-cta-box {
  background: linear-gradient(135deg, #fff0f5 0%, #f0f4ff 100%);
  border-radius: var(--border-radius-md);
  padding: 28px;
  margin: 40px 0;
  text-align: center;
  border: 1px solid rgba(255, 51, 119, 0.2);
}

/* User Reviews Section on Article Footer */
.user-reviews-footer {
  margin-top: 50px;
  padding-top: 30px;
  border-top: 2px dashed #e2e8f0;
}

.review-item {
  background: #f8fafc;
  border-radius: var(--border-radius-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
}

.review-user {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.review-stars {
  color: #ffb703;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid, .pricing-grid, .articles-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
  .client-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links {
    display: none;
  }
}