/* ==========================================================================
   MESL Cloud (mesl.club) - 官方旗舰落地页全套视觉与排版样式表
   视觉风格：炽焰赤红与曜石暗夜（Cyber Crimson & Obsidian Red Glow）
   ========================================================================== */

:root {
  --bg-deep: #0e0306;
  --bg-surface: #19060b;
  --bg-surface-hover: #260912;
  --bg-card: rgba(30, 8, 15, 0.78);
  --bg-card-border: rgba(239, 68, 68, 0.16);

  --red-main: #ef4444;
  --red-glow: #dc2626;
  --red-light: #f87171;
  --rose-accent: #f43f5e;
  --crimson-deep: #be123c;
  --amber-accent: #f59e0b;
  --emerald-accent: #10b981;

  --text-pure: #ffffff;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;

  --border-subtle: rgba(239, 68, 68, 0.12);
  --border-red: rgba(239, 68, 68, 0.4);
  --border-gold: rgba(245, 158, 11, 0.4);

  --radius-xl: 20px;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-base);
  background-color: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  /* 炽烈红曜石多向辐射渐变背景 */
  background: 
    radial-gradient(at 15% 10%, rgba(239, 68, 68, 0.28) 0px, transparent 52%),
    radial-gradient(at 85% 18%, rgba(244, 63, 94, 0.25) 0px, transparent 50%),
    radial-gradient(at 50% 65%, rgba(225, 29, 72, 0.2) 0px, transparent 55%),
    radial-gradient(circle at 50% 0%, rgba(220, 38, 38, 0.22) 0%, transparent 60%),
    linear-gradient(180deg, #110306 0%, #1a060d 45%, #0e0205 100%);
  min-height: 100vh;
}

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

a:hover {
  color: #fca5a5;
}

img, svg {
  vertical-align: middle;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 90px 0;
}

/* 渐变高光文字 */
.text-gradient {
  background: linear-gradient(135deg, #fca5a5 0%, #ef4444 45%, #f43f5e 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gold {
  background: linear-gradient(135deg, #fde047, #f59e0b, #ea580c);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 按钮规范 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #ef4444 0%, #e11d48 50%, #b91c1c 100%);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 1rem;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 22px rgba(239, 68, 68, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(239, 68, 68, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary) !important;
  font-weight: 500;
  font-size: 1rem;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.4);
  transform: translateY(-2px);
}

/* Header 导航 */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(18, 4, 8, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(239, 68, 68, 0.18);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-pure);
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 0 12px rgba(239, 68, 68, 0.6));
}

.logo-text-box {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-badge-flagship {
  font-size: 0.65rem;
  padding: 2px 7px;
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.25), rgba(244, 63, 94, 0.3));
  border: 1px solid var(--red-main);
  color: #fca5a5;
  border-radius: 20px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.logo-sub {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-family: monospace;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.94rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--red-light);
}

.nav-cta-btn {
  padding: 9px 20px;
  font-size: 0.88rem;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.6rem;
  cursor: pointer;
}

.mobile-drawer {
  display: none;
  position: absolute;
  top: 74px;
  left: 0;
  width: 100%;
  background: rgba(22, 5, 10, 0.98);
  border-bottom: 1px solid var(--border-subtle);
  padding: 20px 24px;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
}

.mobile-drawer.active {
  display: flex;
}

.mobile-drawer a {
  font-size: 1rem;
  color: var(--text-primary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(239, 68, 68, 0.1);
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 100px 0 80px;
  text-align: center;
  overflow: hidden;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.38);
  border-radius: 9999px;
  color: #fca5a5;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 28px;
}

.hero-pill .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--red-main);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--red-main);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1.5px;
  color: var(--text-pure);
  margin-bottom: 24px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-subtitle strong {
  color: var(--red-light);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  color: var(--text-tertiary);
  font-size: 0.88rem;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 7px;
}

.trust-item span {
  color: var(--red-light);
}

/* 节点延迟监控探针矩阵 (Network Monitor Matrix) */
.monitor-section {
  padding: 40px 0 80px;
}

.monitor-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
}

.monitor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.monitor-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-pure);
  display: flex;
  align-items: center;
  gap: 10px;
}

.monitor-status-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: #fca5a5;
  background: rgba(239, 68, 68, 0.12);
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--red-main);
  animation: pulse 1.6s infinite;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.node-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(239, 68, 68, 0.12);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  transition: var(--transition);
}

.node-box:hover {
  background: rgba(239, 68, 68, 0.08);
  border-color: var(--border-red);
  transform: translateY(-2px);
}

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

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-pure);
}

.node-type-tag {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: rgba(239, 68, 68, 0.18);
  color: #fca5a5;
  border-radius: 4px;
  border: 1px solid rgba(239, 68, 68, 0.35);
  font-weight: 600;
}

.node-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.dynamic-node-ping {
  color: #f87171;
  font-weight: 700;
  font-family: monospace;
}

/* 通用区块标题 */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}

.section-pill {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: #f87171;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-pure);
  margin-bottom: 16px;
  line-height: 1.3;
}

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

/* 核心特性卡片网格 (Quad Grid) */
.quad-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.quad-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.quad-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--red-main), transparent);
  opacity: 0;
  transition: var(--transition);
}

.quad-card:hover {
  border-color: var(--border-red);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(239, 68, 68, 0.2);
}

.quad-card:hover::before {
  opacity: 1;
}

.quad-icon-wrap {
  width: 52px;
  height: 52px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 22px;
}

.quad-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 12px;
}

.quad-card p {
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.7;
}

.quad-card strong {
  color: var(--text-primary);
}

/* 硬核对比矩阵 (Comparison Matrix) */
.compare-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  overflow-x: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.compare-table th, .compare-table td {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(239, 68, 68, 0.1);
}

.compare-table th {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-tertiary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.compare-table th.col-flagship {
  color: #fca5a5;
  background: rgba(239, 68, 68, 0.1);
}

.compare-table td.col-flagship {
  background: rgba(239, 68, 68, 0.04);
  font-weight: 600;
  color: #ffffff;
}

.compare-table tr:hover td {
  background-color: rgba(239, 68, 68, 0.04);
}

.status-check {
  color: #f87171;
  font-weight: bold;
}

.status-cross {
  color: #94a3b8;
  font-weight: bold;
}

/* 套餐价格矩阵 (Pricing Cards Matrix) */
.pricing-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.plan-box {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(14px);
}

.plan-box:hover {
  border-color: rgba(239, 68, 68, 0.4);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(239, 68, 68, 0.25);
}

.plan-box.flagship-hot {
  border: 2px solid var(--red-main);
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.15) 0%, rgba(35, 10, 18, 0.95) 100%);
  box-shadow: 0 0 35px rgba(239, 68, 68, 0.35);
  transform: scale(1.02);
}

.plan-box.flagship-hot:hover {
  transform: scale(1.02) translateY(-5px);
  box-shadow: 0 0 45px rgba(239, 68, 68, 0.5);
}

.flagship-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #ef4444, #e11d48);
  color: #ffffff;
  padding: 4px 14px;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.5);
}

.plan-header-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 8px;
}

.plan-header-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 22px;
  min-height: 42px;
}

.plan-cost-display {
  display: flex;
  align-items: baseline;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(239, 68, 68, 0.12);
}

.plan-sym {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f87171;
}

.plan-figure {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-pure);
  letter-spacing: -1px;
  margin-left: 2px;
}

.plan-duration {
  font-size: 0.95rem;
  color: var(--text-tertiary);
  margin-left: 6px;
}

.plan-checklist {
  list-style: none;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

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

.plan-checklist svg {
  width: 18px;
  height: 18px;
  color: var(--red-main);
  flex-shrink: 0;
}

/* 用户真实口碑 (Testimonials) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(239, 68, 68, 0.35);
  transform: translateY(-3px);
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
  font-style: italic;
}

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

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ef4444, #be123c);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 1rem;
}

.review-meta-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-pure);
}

.review-meta-role {
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

/* 常见问题 FAQ 手风琴 */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-card:hover {
  border-color: rgba(239, 68, 68, 0.3);
}

.faq-trigger {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-pure);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon-arrow {
  font-size: 1.2rem;
  color: var(--red-light);
  transition: transform 0.28s ease;
}

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

.faq-answer-content {
  display: none;
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.faq-card.active .faq-answer-content {
  display: block;
}

/* 文章专栏卡片矩阵 */
.articles-portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 26px;
}

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

.article-portal-card:hover {
  border-color: var(--border-red);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(239, 68, 68, 0.2);
}

.tag-red, .tag-cyan {
  display: inline-block;
  font-size: 0.75rem;
  padding: 3px 8px;
  background: rgba(239, 68, 68, 0.18);
  color: #fca5a5;
  border-radius: 4px;
  margin-bottom: 12px;
  font-weight: 600;
}

.article-portal-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 12px;
  line-height: 1.45;
  transition: var(--transition);
}

.article-portal-card a:hover h3 {
  color: var(--red-light);
}

.article-portal-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.article-action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(239, 68, 68, 0.1);
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.article-link-cta {
  color: var(--red-light);
  font-weight: 600;
}

.article-link-cta:hover {
  color: #fca5a5;
  text-decoration: underline;
}

/* Footer & PBN Friendship Link Styling (核心任务 2 深度融合) */
.site-footer {
  background: #090204;
  border-top: 1px solid rgba(239, 68, 68, 0.18);
  padding: 70px 0 35px;
  color: var(--text-secondary);
}

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

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-tertiary);
  margin-top: 14px;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-col ul a:hover {
  color: var(--red-light);
}

.footer-bottom-bar {
  border-top: 1px solid rgba(239, 68, 68, 0.12);
  padding-top: 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

/* 【核心任务 2 专用友情链接容器】：低调、美观、小字号、与原页面深度融合 */
.footer-friend-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.footer-friend-links .label {
  color: var(--text-tertiary);
  opacity: 0.8;
}

.footer-friend-links a {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: var(--transition);
  opacity: 0.85;
}

.footer-friend-links a:hover {
  color: var(--red-light);
  opacity: 1;
}

.footer-friend-links span {
  opacity: 0.4;
  font-size: 0.7rem;
}

/* 文章内页专用排版 (Article Page Layout) */
.breadcrumb {
  font-size: 0.88rem;
  color: var(--text-tertiary);
  margin-bottom: 28px;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--red-light);
}

.article-page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(239, 68, 68, 0.15);
}

.article-page-title {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-pure);
  margin-bottom: 16px;
}

.article-header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-tertiary);
}

.article-split-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
}

.article-main-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-main-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-pure);
  margin: 40px 0 16px;
  padding-left: 12px;
  border-left: 4px solid var(--red-main);
}

.article-main-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-pure);
  margin: 28px 0 12px;
}

.article-main-body p {
  margin-bottom: 20px;
}

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

.article-main-body li {
  margin-bottom: 10px;
}

.article-main-body strong {
  color: #ffffff;
}

.article-callout {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 30px 0;
  font-size: 0.98rem;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(225, 29, 72, 0.15));
  border: 1px solid var(--border-red);
  border-radius: var(--radius-lg);
  padding: 30px;
  text-align: center;
  margin: 40px 0;
}

.article-cta-box h3 {
  font-size: 1.35rem;
  color: #ffffff;
  margin-bottom: 10px;
}

.article-cta-box p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* 侧边栏 */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(239, 68, 68, 0.12);
}

.sidebar-article-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar-article-list a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: block;
}

.sidebar-article-list a:hover {
  color: var(--red-light);
}

/* 响应式断点 (Mobile Responsive) */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .footer-columns {
    grid-template-columns: 1fr 1fr;
  }
  .article-split-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta-btn {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-section {
    padding: 70px 0 50px;
  }
  .hero-title {
    font-size: 2.1rem;
    letter-spacing: -0.5px;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .section-padding {
    padding: 60px 0;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .footer-columns {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .plan-box.flagship-hot {
    transform: none;
  }
  .plan-box.flagship-hot:hover {
    transform: translateY(-4px);
  }
}