/* ==========================================================================
   魔界 (Mojie) - 官方极速网络加速落地页样式表
   移动端优先 (Mobile-First) / 现代化极简暗黑科技风格 / 秒开级纯原生 CSS
   ========================================================================== */

:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #111726;
  --bg-card: #151d30;
  --bg-card-hover: #1b253e;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-sub: #6b7280;
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(6, 182, 212, 0.4);
  --card-glow: 0 10px 30px -10px rgba(6, 182, 212, 0.15);
  --btn-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --btn-gradient-hover: linear-gradient(135deg, #0891b2 0%, #2563eb 100%);
  --hot-badge-gradient: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-max-w: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

/* 容器布局 */
.container {
  width: 100%;
  max-width: var(--container-max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* 背景光斑效果 */
.bg-glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
}
.orb-1 {
  top: -100px;
  left: 10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-cyan), transparent);
}
.orb-2 {
  top: 400px;
  right: 5%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, var(--accent-blue), transparent);
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.975rem;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--btn-gradient);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.35);
}
.btn-primary:hover {
  background: var(--btn-gradient-hover);
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--border-color);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.45rem 1.1rem;
  font-size: 0.875rem;
}

.btn-block {
  width: 100%;
}

/* 徽章 Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.785rem;
  font-weight: 600;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
}
.badge-hot {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}
.badge-cyan {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

/* 导航栏 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 13, 20, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}
.brand-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--btn-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.15rem;
  font-weight: bold;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.4);
}
.nav-menu {
  display: none; /* 移动端默认隐藏，中大屏展示 */
  align-items: center;
  gap: 1.5rem;
}
.nav-link {
  font-size: 0.925rem;
  color: var(--text-muted);
  font-weight: 500;
}
.nav-link:hover {
  color: var(--accent-cyan);
}
.header-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* 主视觉区 Hero Section */
.hero-section {
  position: relative;
  padding: 3.5rem 0 4.5rem;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-text {
  text-align: left;
}
.hero-tag {
  margin-bottom: 1.25rem;
}
.hero-title {
  font-size: 2.15rem;
  font-weight: 900;
  line-height: 1.22;
  margin-bottom: 1.25rem;
  color: #ffffff;
  letter-spacing: -0.03em;
}
.gradient-text {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 2rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}
.hero-trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.825rem;
  color: var(--text-muted);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.trust-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* 动态元素卡片 Dynamic Hero Card */
.hero-dynamic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--card-glow);
  position: relative;
  overflow: hidden;
}
.hero-dynamic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--btn-gradient);
}
.dash-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}
.dash-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.live-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 2s infinite;
}
@keyframes pulse-ring {
  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-gauge-wrap {
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
}
.gauge-val {
  font-size: 2.25rem;
  font-weight: 900;
  color: #38bdf8;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.gauge-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
}
.gauge-label {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-top: 0.25rem;
}

.ping-nodes-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.ping-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.03);
  transition: var(--transition);
}
.ping-node-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(6, 182, 212, 0.2);
}
.node-flag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}
.node-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
}
.ms-val {
  color: var(--accent-green);
  font-variant-numeric: tabular-nums;
}
.ms-tag {
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

/* 通用区块 Section Header */
.section-padding {
  padding: 4.5rem 0;
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}
.section-subtitle {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}
.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.28;
  color: #ffffff;
  margin-bottom: 0.9rem;
  letter-spacing: -0.02em;
}
.section-desc {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 核心优势卡片 3 Cards */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 1.6rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-focus);
  box-shadow: var(--card-glow);
  background: var(--bg-card-hover);
}
.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
  color: var(--accent-cyan);
}
.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.75rem;
}
.feature-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #e5e7eb;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.check-icon {
  color: var(--accent-cyan);
  font-weight: bold;
}

/* 流媒体与 AI 支持图卡 */
.unlock-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.unlock-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  position: relative;
  transition: var(--transition);
}
.unlock-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.2);
}
.unlock-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.unlock-card p {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.media-badges-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}
.media-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  color: #e5e7eb;
  transition: var(--transition);
}
.media-pill:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

/* 价格对比表 Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: stretch;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.6rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}
.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
  box-shadow: var(--card-glow);
}
.pricing-card.featured {
  border-color: rgba(6, 182, 212, 0.5);
  background: linear-gradient(180deg, rgba(6, 182, 212, 0.07) 0%, var(--bg-card) 35%);
  box-shadow: 0 10px 35px -5px rgba(6, 182, 212, 0.25);
}
.pricing-featured-tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--btn-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 1rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.5);
}
.pricing-head {
  text-align: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}
.plan-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.4rem;
}
.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.15rem;
}
.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
}
.currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: #38bdf8;
}
.price-num {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  letter-spacing: -0.03em;
}
.price-period {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
}
.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  font-size: 0.9rem;
  color: #d1d5db;
  margin-bottom: 2rem;
  flex-grow: 1;
}
.plan-features-list li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.plan-features-list li strong {
  color: #ffffff;
}

/* SEO 文章图卡板块 Articles Section */
.articles-section {
  background: rgba(17, 23, 38, 0.5);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.article-card {
  position: relative;
  cursor: pointer;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 10px 25px -10px rgba(6, 182, 212, 0.2);
}
.article-card:hover .article-body h3 a {
  color: var(--accent-cyan);
}
.article-card:hover .article-btn {
  background: var(--btn-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.4);
}
.article-img-wrap {
  position: relative;
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: #111827;
  display: block;
}
.article-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.article-card:hover .article-img-wrap img {
  transform: scale(1.05);
}
.article-cat-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(6px);
  color: var(--accent-cyan);
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(6, 182, 212, 0.3);
}
.article-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.article-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 0.65rem;
}
.article-body h3 a {
  color: #ffffff;
  transition: var(--transition);
}
.article-body h3 a:hover {
  color: var(--accent-cyan);
}
.article-excerpt {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}
.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.785rem;
  color: var(--text-sub);
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.article-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.32rem 0.85rem;
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.article-btn:hover {
  background: var(--btn-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.4);
  transform: translateY(-1px);
}
.article-link-arrow {
  color: var(--accent-cyan);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* FAQ 常见问题解答 */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}
.faq-item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.faq-q-mark {
  color: var(--accent-cyan);
  font-weight: 800;
}
.faq-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 用户评价 User Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.3);
}
.stars-wrap {
  color: #fbbf24;
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
  letter-spacing: 0.1em;
}
.review-text {
  font-size: 0.925rem;
  color: #d1d5db;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}
.reviewer-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.reviewer-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}
.reviewer-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
}
.reviewer-role {
  font-size: 0.785rem;
  color: var(--text-sub);
}

/* 页脚 Footer */
.site-footer {
  background: #07090e;
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2rem;
  position: relative;
}
.footer-nav-titles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem 3rem;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}
.footer-nav-link {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  position: relative;
  transition: var(--transition);
}
.footer-nav-link:hover {
  color: var(--accent-cyan);
  text-decoration: underline;
}

/* 页脚 PBN 外链与版权 */
.footer-pbn-wrap {
  text-align: center;
  padding-top: 1.5rem;
}
.pbn-statement {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.7;
}
.pbn-links-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem 1.75rem;
  margin-bottom: 1.5rem;
}
.pbn-link-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #38bdf8; /* 显色高亮 */
  padding: 0.35rem 0.75rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.pbn-link-item:hover {
  color: #ffffff;
  background: rgba(56, 189, 248, 0.25);
  border-color: #38bdf8;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.35);
  transform: translateY(-1px);
}
.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-top: 1rem;
}

/* 独立内容页通用样式 (用于 about, terms, privacy, sitemap, articles) */
.page-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.25rem 5rem;
}
.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}
.article-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  color: #ffffff;
  margin-bottom: 1rem;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.article-content {
  font-size: 1.025rem;
  line-height: 1.8;
  color: #d1d5db;
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin: 2.25rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #e5e7eb;
  margin: 1.5rem 0 0.75rem;
}
.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;
  list-style: disc;
}
.article-content blockquote {
  border-left: 4px solid var(--accent-cyan);
  padding: 0.75rem 1.25rem;
  background: rgba(6, 182, 212, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
  color: #e2e8f0;
}
.article-content a {
  color: #38bdf8;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: #ffffff;
}
.article-content a.btn,
.article-cta-box a.btn {
  color: #ffffff !important;
  text-decoration: none !important;
  background: var(--btn-gradient) !important;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.4);
  font-weight: 700;
  display: inline-flex;
}
.article-content a.btn:hover,
.article-cta-box a.btn:hover {
  background: var(--btn-gradient-hover) !important;
  color: #ffffff !important;
  text-decoration: none !important;
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.6);
  transform: translateY(-2px);
}
.article-cta-box {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.12) 0%, rgba(59, 130, 246, 0.12) 100%);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  text-align: center;
  margin: 2.5rem 0;
}

/* ==========================================================================
   响应式断点 Media Queries (移动端优先扩展)
   ========================================================================== */

/* 平板设备 (>= 640px) */
@media (min-width: 640px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .unlock-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 桌面端 (>= 1024px) */
@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
  }
  .hero-section {
    padding: 5rem 0 6.5rem;
  }
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 4rem;
  }
  .hero-title {
    font-size: 3.1rem;
  }
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pricing-card.featured {
    transform: scale(1.04);
  }
  .pricing-card.featured:hover {
    transform: scale(1.04) translateY(-6px);
  }
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}