/* ==========================================================================
   91机场网 (91jichang.cfd) - 全球高速IEPL专线加速落地页核心样式
   架构设计：纯原生 CSS3 · 极客深色科技风 · 秒开性能优化 · 硬件加速动效
   ========================================================================== */

:root {
  --bg-primary: #040711;
  --bg-secondary: #0a0f1d;
  --bg-card: rgba(16, 24, 40, 0.75);
  --bg-card-hover: rgba(22, 34, 58, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);
  
  --color-primary: #00f0ff;
  --color-secondary: #3b82f6;
  --color-accent: #8b5cf6;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  
  --color-ice-green: #6ee7b7;
  --color-ice-green-light: #bbf7d0;
  --color-ice-green-dark: #34d399;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-light: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(110, 231, 183, 0.4);
  --border-glow: 0 0 20px rgba(110, 231, 183, 0.3);
  
  --gradient-neon: linear-gradient(135deg, #e6fff4 0%, #bbf7d0 30%, #6ee7b7 65%, #34d399 100%);
  --gradient-ice-green: linear-gradient(135deg, #e6fff4 0%, #bbf7d0 30%, #6ee7b7 65%, #34d399 100%);
  --gradient-btn: linear-gradient(135deg, #bbf7d0 0%, #6ee7b7 45%, #34d399 100%);
  --gradient-card: linear-gradient(180deg, rgba(30, 41, 59, 0.5) 0%, rgba(15, 23, 42, 0.8) 100%);
  --gradient-featured: linear-gradient(180deg, rgba(37, 99, 235, 0.15) 0%, rgba(15, 23, 42, 0.9) 100%);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px rgba(0, 240, 255, 0.25);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* ==========================================================================
   动态森林松林晨曦背景：纯 CSS 硬件加速渲染 · 慢呼吸运镜 · 丁达尔光晕与林间晨雾
   ========================================================================== */
.dynamic-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background-color: #03080c;
}

/* 森林主体动态呼吸层 (Ken Burns 平滑缩放与微漂移 · 4K 超清画质优化) */
.dynamic-background::before {
  content: "";
  position: absolute;
  top: -6%;
  left: -6%;
  width: 112%;
  height: 112%;
  background-image: 
    linear-gradient(180deg, 
      rgba(4, 7, 17, 0.72) 0%, 
      rgba(4, 18, 14, 0.46) 30%, 
      rgba(3, 14, 12, 0.58) 65%, 
      rgba(4, 7, 17, 0.86) 100%),
    radial-gradient(circle at 55% 42%, rgba(110, 231, 183, 0.12) 0%, transparent 65%),
    url("assets/forest-bg.jpg");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  image-rendering: high-quality;
  will-change: transform;
  animation: forestBreath 36s ease-in-out infinite alternate;
}

/* 林间晨光丁达尔光柱模拟 (斜切微光流淌) */
.dynamic-background::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 140%;
  height: 140%;
  background: repeating-linear-gradient(
    -52deg,
    rgba(255, 255, 255, 0.025) 0px,
    rgba(110, 231, 183, 0.045) 50px,
    transparent 100px,
    transparent 220px
  );
  filter: blur(28px);
  mix-blend-mode: screen;
  opacity: 0.65;
  animation: beamShimmer 20s ease-in-out infinite alternate;
}

/* 林间晨雾与光斑粒子 */
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  will-change: transform, opacity;
}

/* 顶部与中央晨光光晕 */
.bg-orb-1 {
  width: 550px;
  height: 550px;
  top: -50px;
  left: 20%;
  background: radial-gradient(circle, rgba(167, 243, 208, 0.22) 0%, rgba(110, 231, 183, 0.12) 50%, transparent 100%);
  animation: forestOrbDrift1 26s ease-in-out infinite alternate;
}

/* 右侧林梢晨霭与冰绿辉光 */
.bg-orb-2 {
  width: 500px;
  height: 500px;
  top: 30%;
  right: -50px;
  background: radial-gradient(circle, rgba(110, 231, 183, 0.18) 0%, rgba(52, 211, 153, 0.08) 60%, transparent 100%);
  animation: forestOrbDrift2 28s ease-in-out infinite alternate;
}

/* 底部草木荧光微粒 */
.bg-orb-3 {
  width: 520px;
  height: 520px;
  bottom: -80px;
  left: 15%;
  background: radial-gradient(circle, rgba(52, 211, 153, 0.16) 0%, rgba(16, 185, 129, 0.06) 65%, transparent 100%);
  animation: forestOrbDrift3 24s ease-in-out infinite alternate;
}

@keyframes forestBreath {
  0% { transform: scale(1.02) translate(0, 0); }
  50% { transform: scale(1.08) translate(-1.5%, -1%); }
  100% { transform: scale(1.02) translate(0, 0); }
}

@keyframes beamShimmer {
  0% { opacity: 0.45; transform: rotate(0deg) translate(0, 0); }
  50% { opacity: 0.75; transform: rotate(1.2deg) translate(-25px, 15px); }
  100% { opacity: 0.45; transform: rotate(0deg) translate(0, 0); }
}

@keyframes forestOrbDrift1 {
  0% { transform: translate(0, 0) scale(1); opacity: 0.4; }
  50% { transform: translate(50px, 40px) scale(1.1); opacity: 0.65; }
  100% { transform: translate(-30px, 20px) scale(0.95); opacity: 0.4; }
}

@keyframes forestOrbDrift2 {
  0% { transform: translate(0, 0) scale(1); opacity: 0.35; }
  50% { transform: translate(-60px, -40px) scale(1.12); opacity: 0.55; }
  100% { transform: translate(30px, 30px) scale(0.92); opacity: 0.35; }
}

@keyframes forestOrbDrift3 {
  0% { transform: translate(0, 0) scale(0.95); opacity: 0.35; }
  50% { transform: translate(60px, -50px) scale(1.15); opacity: 0.6; }
  100% { transform: translate(-20px, 20px) scale(1); opacity: 0.35; }
}

/* ==========================================================================
   布局容器与通用组件
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1260px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 54px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  color: var(--color-primary);
  font-size: 0.825rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.section-badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-primary);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #ffffff;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.68;
}

.gradient-text {
  background: var(--gradient-ice-green);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  filter: drop-shadow(0 0 25px rgba(110, 231, 183, 0.35));
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #042017;
  font-weight: 800;
  box-shadow: 0 4px 18px rgba(110, 231, 183, 0.45);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(110, 231, 183, 0.7);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--border-light);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: rgba(0, 240, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   导航头部 (包含左上方品牌Logo与导航菜单)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(4, 7, 17, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo-img {
  height: 48px;
  width: auto;
  display: block;
}

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
  padding: 8px 0;
}

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

.nav-link:hover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-neon);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ==========================================================================
   Hero 主视觉区域
   ========================================================================== */
.hero-section {
  padding: 110px 0 85px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 960px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.35);
  margin-bottom: 28px;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.hero-pill-badge {
  background: var(--gradient-btn);
  color: #042017;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.hero-pill-text {
  font-size: 0.88rem;
  color: var(--text-main);
  font-weight: 500;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  color: #ffffff;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 38px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -10px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-light);
}

.stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.stat-label {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   实时节点测速与延迟看板
   ========================================================================== */
.speed-board {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  backdrop-filter: blur(14px);
  margin-top: 40px;
}

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

.speed-table th {
  padding: 14px 18px;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-light);
}

.speed-table td {
  padding: 16px 18px;
  font-size: 0.925rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.speed-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.node-flag {
  font-size: 1.25rem;
  margin-right: 8px;
}

.node-name {
  font-weight: 600;
  color: var(--text-main);
}

.node-protocol {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.ping-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.9rem;
}

.ping-tag.low { color: #10b981; }
.ping-tag.mid { color: #38bdf8; }

.ping-bar-wrap {
  width: 100%;
  max-width: 130px;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  overflow: hidden;
}

.ping-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #00f0ff);
  border-radius: 3px;
}

/* ==========================================================================
   核心优势网格 (6 大核心竞争力)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  transition: all 0.3s ease;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-neon);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 240, 255, 0.3);
  box-shadow: 0 16px 35px -8px rgba(0, 240, 255, 0.15);
  background: var(--bg-card-hover);
}

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

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--color-primary);
}

.feature-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.68;
}

/* ==========================================================================
   套餐价格区域 (核心严格要求：所有价格同排展示)
   ========================================================================== */
.pricing-section {
  background: linear-gradient(180deg, rgba(4, 7, 17, 0) 0%, rgba(10, 15, 29, 0.8) 50%, rgba(4, 7, 17, 0) 100%);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

/* 核心：同排四列网格，确保桌面端一字排开 */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(14px);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-primary);
  box-shadow: 0 18px 40px -10px rgba(0, 240, 255, 0.28);
}

/* 热门推荐卡片高亮 */
.pricing-card.featured {
  background: var(--gradient-featured);
  border: 2px solid var(--color-primary);
  box-shadow: 0 15px 42px -6px rgba(0, 240, 255, 0.38);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-8px);
  box-shadow: 0 22px 50px -5px rgba(0, 240, 255, 0.55);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-btn);
  color: #042017;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(110, 231, 183, 0.5);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 24px;
  text-align: center;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 42px;
  line-height: 1.5;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin: 18px 0 8px;
}

.price-currency {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-primary);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  letter-spacing: -1px;
}

.price-period {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
}

.plan-sub-billing {
  font-size: 0.78rem;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-top: 4px;
}

.plan-features {
  list-style: none;
  margin: 22px 0 28px;
  padding: 20px 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-main);
  line-height: 1.45;
}

.check-icon {
  color: var(--color-primary);
  font-weight: 800;
  flex-shrink: 0;
}

.plan-action {
  margin-top: auto;
}

.pricing-guarantee-note {
  text-align: center;
  margin-top: 40px;
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.guarantee-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   全平台客户端与协议适配
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all 0.28s ease;
}

.client-card:hover {
  border-color: rgba(0, 240, 255, 0.4);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.client-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  display: block;
}

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

.client-systems {
  font-size: 0.825rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.client-desc {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   文章专栏 Showcase (内部跳转及 SEO 聚合)
   ========================================================================== */
.articles-showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card-mini {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.article-card-mini:hover {
  transform: translateY(-6px);
  border-color: var(--color-primary);
  box-shadow: 0 14px 30px -8px rgba(0, 240, 255, 0.2);
}

.article-mini-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.1);
  color: var(--color-primary);
  margin-bottom: 14px;
  width: fit-content;
}

.article-mini-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  color: #ffffff;
  margin-bottom: 12px;
}

.article-mini-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.article-mini-title a:hover {
  color: var(--color-primary);
}

.article-mini-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.article-mini-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

.article-mini-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-mini-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   用户评价与真实口碑 (Testimonials)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: transform 0.28s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 240, 255, 0.3);
}

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

.testimonial-text {
  font-size: 0.925rem;
  color: var(--text-main);
  line-height: 1.68;
  margin-bottom: 20px;
  font-style: normal;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #040711;
  font-size: 0.95rem;
  flex-shrink: 0;
}

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

.author-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
}

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

/* ==========================================================================
   常见问题 FAQ (支持无JS原生Details/Summary及平滑过渡)
   ========================================================================== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item[open] {
  border-color: rgba(0, 240, 255, 0.4);
  background: var(--bg-card-hover);
}

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

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

.faq-icon {
  font-size: 1.25rem;
  color: var(--color-primary);
  transition: transform 0.25s ease;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
}

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

/* ==========================================================================
   优质外链与生态导航 (Authority Links)
   ========================================================================== */
.external-links-box {
  background: rgba(10, 15, 29, 0.6);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-top: 60px;
}

.external-links-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.external-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.external-link-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.external-link-item:hover {
  background: rgba(0, 240, 255, 0.08);
  border-color: rgba(0, 240, 255, 0.3);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   页脚区域 (Footer)
   ========================================================================== */
.site-footer {
  background: #02040a;
  border-top: 1px solid var(--border-light);
  padding: 70px 0 30px;
}

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

.footer-brand-desc {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.68;
  margin-top: 16px;
  max-width: 380px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
}

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

.footer-nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

.footer-nav-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom a {
  color: var(--text-dim);
  text-decoration: none;
  margin: 0 8px;
}

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

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1100px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .external-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.35rem;
  }
  .hero-desc {
    font-size: 1.05rem;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid-same-row {
    grid-template-columns: 1fr;
  }
  .clients-grid {
    grid-template-columns: 1fr;
  }
  .articles-showcase-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .external-links-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}