/* ==========================================================================
   TAG VPN (tagvpn.click) - Minimal Flat & Neo-Modern Design System
   结合极简扁平黑白线框美学 + 灵动动态微交互
   ========================================================================== */

:root {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-alt: #f1f5f9;
  --bg-dark: #0f172a;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-dark: #0f172a;
  --border-light: #e2e8f0;
  --border-hover: #3b82f6;

  /* Accent Colors (图1底部彩条 + 图2蓝调元素) */
  --accent-blue: #2563eb;
  --accent-blue-light: #eff6ff;
  --accent-pink: #f43f5e;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;

  /* Flat Shadows & Borders */
  --flat-border: 2px solid #0f172a;
  --flat-border-light: 1px solid #e2e8f0;
  --flat-shadow: 4px 4px 0px #0f172a;
  --flat-shadow-hover: 6px 6px 0px #0f172a;
  --flat-shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background Dynamic Dot Grid (动态背景点阵) */
.bg-grid-pattern {
  background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
}

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

/* Top Accent Stripe (图1设计灵感：黑、粉红、绿三段式特色边条) */
.top-color-stripe {
  height: 4px;
  width: 100%;
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
}
.stripe-black { flex: 1; background-color: #0f172a; }
.stripe-pink { flex: 1; background-color: #f43f5e; }
.stripe-green { flex: 1; background-color: #10b981; }

/* Navbar */
.navbar {
  position: sticky;
  top: 4px;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--border-dark);
  z-index: 999;
  transition: var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
}

.logo-box {
  width: 36px;
  height: 36px;
  background-color: var(--border-dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
  border-radius: var(--radius-sm);
  box-shadow: 2px 2px 0px var(--accent-pink);
  transform: rotate(-3deg);
  transition: var(--transition-fast);
}

.logo-brand:hover .logo-box {
  transform: rotate(0deg) scale(1.05);
}

.logo-badge {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: var(--accent-blue-light);
  color: var(--accent-blue);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #bfdbfe;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  position: relative;
  padding: 6px 2px;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-blue);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Button System (Minimal Flat + 动态反馈) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn-flat-black {
  background: var(--border-dark);
  color: #ffffff;
  border: var(--flat-border);
  box-shadow: 3px 3px 0px #000;
}

.btn-flat-black:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px #000;
  background: #1e293b;
  color: #fff;
}

.btn-flat-primary {
  background: var(--accent-blue);
  color: #ffffff;
  border: var(--flat-border);
  box-shadow: 3px 3px 0px #0f172a;
}

.btn-flat-primary:hover {
  background: #1d4ed8;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px #0f172a;
  color: #fff;
}

.btn-flat-outline {
  background: #ffffff;
  color: var(--border-dark);
  border: var(--flat-border);
  box-shadow: 3px 3px 0px #0f172a;
}

.btn-flat-outline:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px #0f172a;
  background: #f8fafc;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
}

.btn-pulse {
  animation: pulse-glow 2.5s infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 3px 3px 0px #0f172a;
  }
  50% {
    box-shadow: 4px 4px 15px rgba(37, 99, 235, 0.4), 3px 3px 0px #0f172a;
  }
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--border-dark);
  margin: 5px 0;
  transition: var(--transition-fast);
}

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

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--accent-blue);
  background: var(--accent-blue-light);
  border: 1px solid #bfdbfe;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.live-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-dot 1.8s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3.2rem;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-title .highlight {
  position: relative;
  display: inline-block;
  color: var(--accent-blue);
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 8px;
  width: 100%;
  height: 12px;
  background-color: rgba(37, 99, 235, 0.15);
  z-index: -1;
  border-radius: 4px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-light);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--border-dark);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Minimal Flat Box Hero Visual (图1风格致敬) */
.hero-flat-card {
  position: relative;
  background: #ffffff;
  border: var(--flat-border);
  box-shadow: 8px 8px 0px #0f172a;
  padding: 36px;
  border-radius: var(--radius-sm);
  transition: var(--transition-normal);
}

.hero-flat-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 12px 12px 0px #0f172a;
}

.flat-top-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.flat-card-title {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 10px;
}

.flat-card-desc {
  font-size: 1.15rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 24px;
}

.flat-status-panel {
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
}

.flat-status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  margin-bottom: 8px;
}

.flat-status-row:last-child {
  margin-bottom: 0;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--accent-green);
}

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

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--accent-blue);
  background: var(--accent-blue-light);
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid #bfdbfe;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.4rem;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

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

.feature-card {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: 4px 4px 0px #0f172a;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0px #0f172a;
  border-color: var(--accent-blue);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  background: var(--accent-blue-light);
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  box-shadow: 2px 2px 0px #0f172a;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Node List Section */
.nodes-table-wrapper {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  box-shadow: 5px 5px 0px #0f172a;
  overflow: hidden;
}

.node-table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  padding: 16px 24px;
  border-bottom: 2px solid var(--border-dark);
}

.node-tabs {
  display: flex;
  gap: 8px;
}

.node-tab-btn {
  background: none;
  border: 1px solid var(--border-light);
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.node-tab-btn.active, .node-tab-btn:hover {
  background: var(--border-dark);
  color: #fff;
  border-color: var(--border-dark);
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 16px;
  padding: 24px;
}

.node-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: var(--transition-fast);
  position: relative;
}

.node-card:hover {
  border-color: var(--accent-blue);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
  transform: translateY(-2px);
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.node-country {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
}

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

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-green);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.node-details {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px dashed #f1f5f9;
  padding-top: 10px;
}

.unlock-tags {
  display: flex;
  gap: 4px;
}

.unlock-badge {
  font-size: 0.7rem;
  background: #f1f5f9;
  padding: 2px 5px;
  border-radius: 3px;
  color: #475569;
}

/* Pricing Section (精准还原 图2 视觉) */
.pricing-section {
  background: #ffffff;
  position: relative;
}

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

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-normal);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.08);
}

/* 推荐卡片（极速版）- 还原图2中的精美高亮蓝框与顶部渐变浮标 */
.pricing-card.featured {
  border: 2px solid #3b82f6;
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.12);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-5px);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.pricing-header {
  margin-bottom: 24px;
}

.pricing-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.pricing-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #1e3a8a;
}

.pricing-card.featured .pricing-name {
  color: #1d4ed8;
}

.pricing-tag {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 999px;
  background: #f1f5f9;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-subdesc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
  min-height: 40px;
}

.pricing-price-box {
  margin: 16px 0 24px;
  padding-bottom: 20px;
  border-bottom: 1px dashed #e2e8f0;
}

.price-currency {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--border-dark);
  vertical-align: top;
  margin-right: 2px;
}

.price-number {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--border-dark);
  line-height: 1;
}

.price-period {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-left: 6px;
}

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

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: #334155;
  margin-bottom: 14px;
  line-height: 1.45;
}

.check-icon {
  color: #2563eb;
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-btn {
  width: 100%;
  padding: 13px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.98rem;
}

/* Tutorials & Client Download */
.tutorials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tutorial-step-card {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: 4px 4px 0px #0f172a;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--accent-blue);
  margin-bottom: 12px;
}

.download-platforms-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.platform-card {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  box-shadow: 3px 3px 0px #0f172a;
  transition: var(--transition-fast);
}

.platform-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0px #0f172a;
}

.platform-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.platform-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.platform-app {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

.review-card {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 4px 4px 0px #0f172a;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.92rem;
  color: #334155;
  line-height: 1.6;
  margin-bottom: 18px;
  font-style: italic;
}

.reviewer-info {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px dashed var(--border-light);
  padding-top: 14px;
}

.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--border-dark);
  border: 1px solid var(--border-dark);
}

.reviewer-name {
  font-weight: 700;
  font-size: 0.92rem;
}

.reviewer-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  box-shadow: 3px 3px 0px #0f172a;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  background: none;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--text-main);
  transition: var(--transition-fast);
}

.faq-question:hover {
  color: var(--accent-blue);
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 24px;
  background: #f8fafc;
  color: #475569;
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 16px 24px 24px;
  border-top: 1px dashed var(--border-light);
}

/* Blog / Article Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  box-shadow: 4px 4px 0px #0f172a;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
}

.blog-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0px #0f172a;
}

.blog-cover {
  height: 160px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 20px;
  color: #ffffff;
}

.blog-tag-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--accent-pink);
  color: #fff;
  border: 1px solid #000;
}

.blog-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.blog-title {
  font-size: 1.15rem;
  margin-bottom: 12px;
  line-height: 1.4;
}

.blog-title a:hover {
  color: var(--accent-blue);
}

.blog-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 18px;
  flex-grow: 1;
}

.blog-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-blue);
  border-top: 1px dashed var(--border-light);
  padding-top: 12px;
}

/* Article Page Specific Styles (1500-2000字长文样式) */
.article-header {
  padding: 60px 0 30px;
  background: #ffffff;
  border-bottom: 2px solid var(--border-dark);
}

.article-breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.article-title {
  font-size: 2.5rem;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.8px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-light);
  padding-top: 16px;
}

.article-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  padding: 50px 0 80px;
  align-items: flex-start;
}

.article-sidebar {
  position: sticky;
  top: 90px;
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-sm);
  padding: 20px;
  box-shadow: 4px 4px 0px #0f172a;
}

.toc-title {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 8px;
}

.toc-list {
  list-style: none;
  font-size: 0.88rem;
}

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

.toc-list a {
  color: var(--text-muted);
  display: block;
  padding: 3px 0;
}

.toc-list a:hover {
  color: var(--accent-blue);
  font-weight: 600;
}

.article-body {
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 44px;
  box-shadow: 5px 5px 0px #0f172a;
}

.article-body h2 {
  font-size: 1.65rem;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-dark);
}

.article-body h3 {
  font-size: 1.25rem;
  margin: 24px 0 12px;
}

.article-body p {
  font-size: 1.02rem;
  line-height: 1.8;
  color: #1e293b;
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
  line-height: 1.75;
  color: #1e293b;
}

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

.article-callout {
  background: #eff6ff;
  border-left: 4px solid var(--accent-blue);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  border-top: 1px solid #bfdbfe;
  border-right: 1px solid #bfdbfe;
  border-bottom: 1px solid #bfdbfe;
}

.article-callout-title {
  font-weight: 800;
  font-size: 1.05rem;
  color: #1e40af;
  margin-bottom: 8px;
}

.article-cta-box {
  background: #0f172a;
  color: #ffffff;
  padding: 32px;
  border-radius: var(--radius-sm);
  margin: 40px 0;
  text-align: center;
  box-shadow: 6px 6px 0px var(--accent-pink);
}

.article-cta-box h3 {
  color: #ffffff;
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.article-cta-box p {
  color: #94a3b8;
  max-width: 600px;
  margin: 0 auto 20px;
}

/* Footer */
.footer {
  background: var(--bg-dark);
  color: #94a3b8;
  padding: 70px 0 30px;
  border-top: 3px solid #000;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand .logo-box {
  background: #ffffff;
  color: #000;
  box-shadow: 2px 2px 0px var(--accent-pink);
}

.footer-brand .brand-name {
  color: #ffffff;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 16px 0 20px;
  max-width: 320px;
}

.footer-title {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
}

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

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

.footer-links a {
  font-size: 0.88rem;
  color: #94a3b8;
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* Floating Action / Back to Top */
.floating-actions {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 990;
}

.float-btn {
  width: 48px;
  height: 48px;
  background: #ffffff;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 3px 3px 0px #0f172a;
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--border-dark);
}

.float-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px #0f172a;
  background: var(--accent-blue);
  color: #ffffff;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, .pricing-grid, .tutorials-grid, .reviews-grid, .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
    margin-bottom: 30px;
  }
  .download-platforms-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-flat-outline {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .features-grid, .pricing-grid, .tutorials-grid, .reviews-grid, .blog-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .download-platforms-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .mobile-menu-drawer {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    border-bottom: 2px solid var(--border-dark);
    padding: 20px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
  }
  .mobile-menu-drawer.open {
    display: block;
  }
  .mobile-menu-drawer .nav-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 20px;
  }
}