/* ==========================================================================
   良心云 (LiangXinYun) - 官方极简高性能样式表
   设计语言：温暖米白/奶油风、琥珀金主色调、现代化圆角柔光、全端响应式
   ========================================================================== */

:root {
  --bg-primary: #FAF9F5;
  --bg-card: #FFFFFF;
  --bg-card-subtle: #F5F4EE;
  --bg-hero-badge: #FEF9EE;
  --brand-gold: #D4A373;
  --brand-gold-deep: #B47C3A;
  --brand-gold-dark: #8C651A;
  --brand-gold-light: #FBF4E4;
  --brand-amber: #D97706;
  --brand-accent: #E5A93C;
  --text-main: #1F2421;
  --text-muted: #666A65;
  --text-light: #949990;
  --border-light: rgba(0, 0, 0, 0.06);
  --border-gold: rgba(212, 163, 115, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 45px rgba(212, 163, 115, 0.12);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --radius-full: 9999px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

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

/* ==========================================================================
   页眉 Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 245, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  padding: 14px 0;
}

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

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

.logo-wrapper:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: #FFFFFF;
  border: 1px solid rgba(212, 163, 115, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(212, 163, 115, 0.12), 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
}

.logo-wrapper:hover .logo-icon {
  transform: rotate(3deg) scale(1.06);
  box-shadow: 0 6px 18px rgba(212, 163, 115, 0.22);
  border-color: var(--brand-amber);
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brand-gold-dark);
  letter-spacing: -0.02em;
}

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

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--brand-gold-dark);
}

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

.btn-dashboard {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background-color: var(--brand-gold-light);
  border: 1px solid var(--border-gold);
  color: var(--brand-gold-dark);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.btn-dashboard:hover {
  background-color: #F8EACB;
  transform: translateY(-1px);
}

.btn-store {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.btn-store:hover {
  background-color: #F8F8F6;
  transform: translateY(-1px);
}

.badge-hot {
  position: absolute;
  top: -6px;
  right: -4px;
  background: #E53935;
  color: #FFF;
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: 8px;
  font-weight: bold;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 4px rgba(229, 57, 53, 0.3);
}

/* ==========================================================================
   主视觉区 Hero Section
   ========================================================================== */
.hero-section {
  padding: 70px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-gold-light);
  border: 1px solid var(--border-gold);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  color: var(--brand-gold-dark);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.22;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-title .highlight {
  color: var(--brand-amber);
  background: linear-gradient(135deg, #D97706, #E5A93C);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #E5A93C, #D97706);
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(217, 119, 6, 0.28);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(217, 119, 6, 0.38);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #FFFFFF;
  border: 1px solid var(--border-gold);
  color: var(--brand-gold-dark);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
}

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

.stat-num {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
}

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

/* 动态预览卡片 (Hero Right) */
.hero-visual {
  position: relative;
}

.hero-mockup-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(212, 163, 115, 0.2);
  position: relative;
  overflow: hidden;
}

.mockup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.mockup-user-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.mockup-user-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: #ECFDF5;
  color: #059669;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #10B981;
  border-radius: 50%;
  animation: pulse-dot 2s 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); }
}

.speed-meter-box {
  background: var(--bg-card-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.speed-info {
  display: flex;
  flex-direction: column;
}

.speed-val {
  font-size: 2rem;
  font-weight: 800;
  color: var(--brand-amber);
  font-variant-numeric: tabular-nums;
}

.speed-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.speed-graph {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 48px;
}

.graph-bar {
  width: 8px;
  background: linear-gradient(to top, var(--brand-gold), var(--brand-amber));
  border-radius: 4px;
  animation: wave 1.6s ease-in-out infinite alternate;
}

.graph-bar:nth-child(1) { height: 40%; animation-delay: 0.1s; }
.graph-bar:nth-child(2) { height: 65%; animation-delay: 0.3s; }
.graph-bar:nth-child(3) { height: 85%; animation-delay: 0.5s; }
.graph-bar:nth-child(4) { height: 50%; animation-delay: 0.2s; }
.graph-bar:nth-child(5) { height: 95%; animation-delay: 0.4s; }
.graph-bar:nth-child(6) { height: 75%; animation-delay: 0.6s; }

@keyframes wave {
  0% { transform: scaleY(0.7); }
  100% { transform: scaleY(1.15); }
}

.mockup-nodes {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  font-size: 0.88rem;
}

.node-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.ping-tag {
  color: #059669;
  font-weight: 700;
  font-size: 0.82rem;
}

/* ==========================================================================
   核心优势 Section (3个图文卡片)
   ========================================================================== */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-gold-deep);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

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

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-gold);
}

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--brand-gold-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--brand-gold-dark);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   流媒体与 AI 支持图卡
   ========================================================================== */
.unlock-section {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  margin-bottom: 80px;
}

.unlock-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  margin-top: 36px;
}

.unlock-card {
  background: var(--bg-card-subtle);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid transparent;
}

.unlock-card:hover {
  background: #FFFFFF;
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
  border-color: var(--border-gold);
}

.unlock-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
  display: inline-block;
}

.unlock-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.unlock-sub {
  font-size: 0.78rem;
  color: #059669;
  font-weight: 600;
}

/* ==========================================================================
   清晰套餐价格对比表
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.pricing-card.featured {
  border: 2px solid var(--brand-amber);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
}

.pricing-card:hover {
  transform: translateY(-6px);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-popular-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #E5A93C, #D97706);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.pricing-tier {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 40px;
}

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

.price-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--brand-amber);
}

.price-num {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--brand-amber);
  line-height: 1;
}

.price-period {
  font-size: 0.88rem;
  color: var(--text-light);
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.check-icon {
  color: #10B981;
  font-weight: bold;
}

.pricing-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  transition: var(--transition);
}

.btn-plan-default {
  background: var(--bg-card-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-light);
}

.btn-plan-default:hover {
  background: var(--brand-gold-light);
  color: var(--brand-gold-dark);
  border-color: var(--border-gold);
}

.btn-plan-featured {
  background: linear-gradient(135deg, #E5A93C, #D97706);
  color: #FFFFFF;
  box-shadow: 0 6px 18px rgba(217, 119, 6, 0.3);
}

.btn-plan-featured:hover {
  box-shadow: 0 10px 24px rgba(217, 119, 6, 0.4);
}

/* ==========================================================================
   12篇 SEO 文章图卡板块 (位于价格下方)
   ========================================================================== */
.articles-section {
  padding: 80px 0;
}

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

.article-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-gold);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-tag {
  background: var(--brand-gold-light);
  color: var(--brand-gold-dark);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
}

.article-date {
  font-size: 0.78rem;
  color: var(--text-light);
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-title a:hover {
  color: var(--brand-amber);
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.read-more-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-gold-deep);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  color: var(--brand-amber);
  transform: translateX(3px);
}

.article-aff-btn {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: var(--brand-gold-light);
  color: var(--brand-gold-dark);
  border: 1px solid var(--border-gold);
  transition: var(--transition);
}

.article-aff-btn:hover {
  background: var(--brand-amber);
  color: #FFFFFF;
}

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

.testimonial-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
}

.stars {
  color: #F59E0B;
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--brand-gold-light);
  color: var(--brand-gold-dark);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.user-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.user-role {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ==========================================================================
   常见问题 FAQ
   ========================================================================== */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

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

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

.faq-arrow {
  transition: transform 0.28s ease;
  font-size: 0.9rem;
  color: var(--text-light);
}

details[open] .faq-arrow {
  transform: rotate(180deg);
  color: var(--brand-amber);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   页脚 Footer
   ========================================================================== */
.site-footer {
  background: #FFFFFF;
  border-top: 1px solid var(--border-light);
  padding: 60px 0 36px;
  margin-top: 80px;
}

.footer-nav-list {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  list-style: none;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.footer-nav-item a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 8px;
  transition: var(--transition);
}

.footer-nav-item a:hover {
  color: var(--brand-amber);
  background: var(--bg-card-subtle);
}

.footer-pbn-block {
  text-align: center;
  padding: 24px 0 16px;
  border-top: 1px solid var(--border-light);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pbn-links-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.pbn-link {
  color: var(--brand-gold-deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.pbn-link:hover {
  color: var(--brand-amber);
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-light);
}

/* ==========================================================================
   右侧章节悬浮上下箭头导航
   ========================================================================== */
.floating-nav {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  padding: 10px;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border-light);
}

.nav-arrow-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.1rem;
}

.nav-arrow-btn:hover {
  background: var(--brand-gold-light);
  color: var(--brand-gold-dark);
  border-color: var(--border-gold);
  transform: scale(1.1);
}

.nav-arrow-btn:active {
  transform: scale(0.95);
}

/* ==========================================================================
   响应式媒体查询 (Mobile-First / RWD)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 10px 0;
  }
  .nav-menu {
    display: none;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
    padding: 14px 20px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav-list {
    gap: 20px;
  }
  .floating-nav {
    right: 14px;
  }
  .nav-arrow-btn {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }
}