/* ==========================================================================
   星云-VPN (Cloud-VPN) 官网落地页 - 顶级玻璃拟态设计系统
   设计语言：深墨绿暗夜、流光发光点缀、磨砂玻璃拟态、高阶排版
   ========================================================================== */

:root {
  --bg-main: #060d0d;
  --bg-gradient: radial-gradient(circle at 15% 15%, rgba(16, 185, 129, 0.15) 0%, transparent 45%),
                 radial-gradient(circle at 85% 25%, rgba(6, 182, 212, 0.12) 0%, transparent 50%),
                 radial-gradient(circle at 50% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 60%),
                 #050c0c;
  
  --primary-teal: #10b981;
  --primary-cyan: #06d6a0;
  --primary-glow: rgba(16, 185, 129, 0.35);
  
  --accent-purple: #6366f1;
  --accent-purple-glow: rgba(99, 102, 241, 0.4);
  --accent-blue: #3b82f6;

  --glass-bg: rgba(13, 27, 26, 0.65);
  --glass-bg-hover: rgba(18, 38, 36, 0.78);
  --glass-card: rgba(11, 23, 23, 0.55);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-bright: rgba(16, 185, 129, 0.28);
  
  --text-main: #f0fdf4;
  --text-body: #94a3b8;
  --text-muted: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-pill: 9999px;

  --shadow-glass: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.1);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.25);
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  background: var(--bg-gradient);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* 动态背景星芒微粒与渐变球 */
.bg-canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.orb-1 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #059669, #022c22);
  top: -80px;
  left: -80px;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #0e7490, #083344);
  top: 35%;
  right: -100px;
  animation-duration: 22s;
  animation-direction: alternate-reverse;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #4f46e5, #1e1b4b);
  bottom: 5%;
  left: 20%;
  opacity: 0.22;
  animation-duration: 26s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.08); }
  100% { transform: translate(-40px, 70px) scale(0.92); }
}

/* 容器限制 */
.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 导航栏样式 - 顶尖毛玻璃悬浮 */
.header-nav {
  position: sticky;
  top: 16px;
  z-index: 100;
  margin-bottom: 24px;
}

.nav-glass-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 28px;
  background: rgba(10, 24, 23, 0.65);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.nav-glass-bar:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--primary-glow);
}

.logo-icon svg {
  width: 18px;
  height: 18px;
  fill: #fff;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-body);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: #fff;
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

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

.btn-ghost {
  text-decoration: none;
  color: var(--text-body);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  transition: var(--transition);
}

.btn-ghost:hover {
  color: #fff;
}

.btn-primary-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #10b981 0%, #06d6a0 100%);
  color: #032018;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 8px 22px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.4);
  transition: var(--transition);
}

.btn-primary-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(16, 185, 129, 0.6);
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
}

/* Hero Section - 墨绿暗调 & 空间声波玻璃雷达 (参考图1) */
.hero-section {
  padding: 50px 0 70px 0;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  max-width: 580px;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  color: #34d399;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-pill-badge .dot {
  width: 6px;
  height: 6px;
  background: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 8px #34d399;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.6); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}

.hero-title {
  font-size: 3.4rem;
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #ffffff;
  margin-bottom: 22px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #a7f3d0 0%, #34d399 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.1rem;
  color: #94a3b8;
  line-height: 1.7;
  margin-bottom: 34px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.3);
  transition: var(--transition);
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(16, 185, 129, 0.55);
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  color: #042f2e;
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 30, 28, 0.7);
  color: #e2e8f0;
  font-weight: 500;
  font-size: 1.02rem;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-border);
  text-decoration: none;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.btn-hero-secondary:hover {
  background: rgba(25, 48, 44, 0.85);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.hero-meta-points {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.hero-meta-points span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 图1风格 雷达声波玻璃视听播放器拟态卡片 */
.hero-radar-card {
  background: rgba(10, 26, 25, 0.68);
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  padding: 26px;
  position: relative;
  overflow: hidden;
}

.radar-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.radar-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #6ee7b7;
  letter-spacing: 0.08em;
}

.radar-screen {
  width: 100%;
  height: 250px;
  border-radius: 18px;
  background: radial-gradient(circle at center, rgba(16, 185, 129, 0.18) 0%, rgba(5, 24, 22, 0.7) 70%, #031413 100%);
  border: 1px solid rgba(16, 185, 129, 0.15);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 22px;
}

/* 雷达同心圆环与雷达扫描动效 */
.radar-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(16, 185, 129, 0.22);
}

.radar-ring-1 { width: 70px; height: 70px; }
.radar-ring-2 { width: 140px; height: 140px; }
.radar-ring-3 { width: 210px; height: 210px; }

.radar-sweep {
  position: absolute;
  width: 250px;
  height: 250px;
  background: conic-gradient(from 0deg, rgba(16, 185, 129, 0.35) 0deg, transparent 60deg, transparent 360deg);
  border-radius: 50%;
  animation: sweepAnim 4.5s linear infinite;
}

@keyframes sweepAnim {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.radar-center-dot {
  width: 10px;
  height: 10px;
  background: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 16px #34d399, 0 0 28px #10b981;
  position: relative;
  z-index: 2;
}

.radar-node-blip {
  position: absolute;
  width: 6px;
  height: 6px;
  background: #67e8f9;
  border-radius: 50%;
  box-shadow: 0 0 10px #67e8f9;
  z-index: 2;
}

.blip-hk { top: 38%; left: 32%; }
.blip-jp { top: 25%; right: 28%; }
.blip-sg { bottom: 35%; left: 45%; }
.blip-us { bottom: 26%; right: 34%; }

.radar-card-info {
  margin-bottom: 18px;
}

.radar-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}

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

/* 动态音频声波条 (Equalizer Bars) */
.soundwave-container {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 36px;
  margin-bottom: 20px;
  padding: 0 4px;
}

.soundwave-bar {
  flex: 1;
  background: linear-gradient(180deg, #34d399 0%, rgba(16, 185, 129, 0.35) 100%);
  border-radius: 3px;
  animation: soundBounce 1.2s ease-in-out infinite alternate;
}

@keyframes soundBounce {
  0% { height: 18%; }
  50% { height: 95%; }
  100% { height: 35%; }
}

.soundwave-bar:nth-child(2) { animation-delay: 0.1s; }
.soundwave-bar:nth-child(3) { animation-delay: 0.25s; }
.soundwave-bar:nth-child(4) { animation-delay: 0.4s; }
.soundwave-bar:nth-child(5) { animation-delay: 0.15s; }
.soundwave-bar:nth-child(6) { animation-delay: 0.35s; }
.soundwave-bar:nth-child(7) { animation-delay: 0.5s; }
.soundwave-bar:nth-child(8) { animation-delay: 0.2s; }
.soundwave-bar:nth-child(9) { animation-delay: 0.45s; }
.soundwave-bar:nth-child(10) { animation-delay: 0.3s; }
.soundwave-bar:nth-child(11) { animation-delay: 0.6s; }
.soundwave-bar:nth-child(12) { animation-delay: 0.18s; }
.soundwave-bar:nth-child(13) { animation-delay: 0.48s; }
.soundwave-bar:nth-child(14) { animation-delay: 0.22s; }
.soundwave-bar:nth-child(15) { animation-delay: 0.38s; }
.soundwave-bar:nth-child(16) { animation-delay: 0.55s; }

.radar-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

.radar-telemetry {
  display: flex;
  gap: 16px;
  font-size: 0.78rem;
  color: #94a3b8;
}

.radar-telemetry span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.radar-telemetry strong {
  color: #34d399;
}

.play-action-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #10b981;
  color: #042f2e;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.4);
  transition: var(--transition);
}

.play-action-btn:hover {
  transform: scale(1.1);
  background: #34d399;
}

/* 核心特性矩阵 (Core Features) */
.section-wrapper {
  padding: 60px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #34d399;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

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

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

.feature-glass-box {
  background: rgba(12, 26, 25, 0.55);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-glass);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-glass-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(16, 185, 129, 0.4), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-glass-box:hover {
  transform: translateY(-5px);
  border-color: rgba(16, 185, 129, 0.25);
  background: rgba(16, 34, 32, 0.75);
}

.feature-glass-box:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #34d399;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.15);
}

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

.feature-desc {
  font-size: 0.94rem;
  color: var(--text-body);
  line-height: 1.65;
}

/* 官方价格套餐 (精确还原新图) */
.pricing-section {
  padding: 70px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.price-card {
  background: #090e1a;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 34px 26px 28px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.55);
}

.price-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 25px 55px rgba(0, 0, 0, 0.7);
}

/* 中间卡片 (高亮突出推荐: 最受欢迎·高性价比) */
.price-card.featured {
  background: linear-gradient(180deg, #0d1226 0%, #0a0f1f 100%);
  border: 2px solid #6366f1;
  box-shadow: 0 20px 60px rgba(99, 102, 241, 0.28);
  transform: translateY(-6px);
}

.price-card.featured:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 70px rgba(99, 102, 241, 0.42);
}

.price-badge-top {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  color: #fff;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 16px rgba(168, 85, 247, 0.5);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.price-card-header {
  margin-bottom: 20px;
}

.price-tier-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.price-tier-desc {
  font-size: 0.84rem;
  color: #94a3b8;
  min-height: 38px;
  line-height: 1.5;
}

.price-amount-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.price-symbol {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
}

.price-number {
  font-size: 2.85rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.price-period {
  font-size: 0.92rem;
  color: #94a3b8;
  margin-left: 2px;
}

/* 权益功能列表 */
.price-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
  flex-grow: 1;
}

.price-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.86rem;
  color: #cbd5e1;
  line-height: 1.5;
}

.price-feature-item .feat-icon {
  font-size: 0.95rem;
  line-height: 1.3;
  flex-shrink: 0;
}

.price-feature-item a {
  color: #818cf8;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: var(--transition);
}

.price-feature-item a:hover {
  color: #a5b4fc;
}

/* 底部元信息列表 */
.price-meta-summary {
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 0 20px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  color: #94a3b8;
}

.price-meta-summary li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-price-order {
  display: block;
  width: 100%;
  text-align: center;
  padding: 13px 20px;
  border-radius: 12px;
  background: #4f46e5;
  color: #ffffff;
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  box-shadow: 0 8px 22px rgba(79, 70, 229, 0.4);
  transition: var(--transition);
  border: none;
}

.btn-price-order:hover {
  background: #4338ca;
  box-shadow: 0 10px 28px rgba(79, 70, 229, 0.6);
  transform: translateY(-2px);
}

.btn-price-order.featured-btn {
  background: linear-gradient(135deg, #7c3aed 0%, #9333ea 100%);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.45);
}

.btn-price-order.featured-btn:hover {
  background: linear-gradient(135deg, #6d28d9 0%, #7e22ce 100%);
  box-shadow: 0 12px 30px rgba(147, 51, 234, 0.65);
}

/* 客户端全平台支持模块 (Clients) */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: rgba(11, 23, 23, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 26px 20px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(14px);
}

.client-card:hover {
  border-color: rgba(16, 185, 129, 0.3);
  transform: translateY(-4px);
  background: rgba(15, 32, 31, 0.7);
}

.client-os-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px auto;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #34d399;
}

.client-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.client-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.client-btn {
  display: inline-block;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.25);
  text-decoration: none;
  transition: var(--transition);
}

.client-btn:hover {
  background: #10b981;
  color: #042f2e;
}

/* AI 工具 & 住宅专线特权模块 (AI Tools) */
.ai-banner-box {
  background: linear-gradient(135deg, rgba(13, 31, 30, 0.75) 0%, rgba(18, 22, 45, 0.75) 100%);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 28px;
  padding: 42px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 36px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.ai-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.ai-tag {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  color: #e2e8f0;
}

.ai-card-mock {
  background: rgba(10, 16, 30, 0.8);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 20px;
  padding: 24px;
}

.ai-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.88rem;
}

.ai-status-pill {
  color: #34d399;
  background: rgba(16, 185, 129, 0.12);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
}

/* 知识库与9篇深度SEO文章矩阵 (Knowledge Base / Articles) */
.articles-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: rgba(11, 23, 23, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 34, 33, 0.75);
}

.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: #34d399;
  text-transform: uppercase;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

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

.article-excerpt {
  font-size: 0.88rem;
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}

.article-read-more {
  color: #34d399;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

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

.faq-item {
  background: rgba(11, 23, 23, 0.65);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: rgba(16, 185, 129, 0.35);
  background: rgba(16, 32, 31, 0.85);
}

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 600;
  color: #f1f5f9;
}

.faq-toggle-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #34d399;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
  background: #10b981;
  color: #042f2e;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: #94a3b8;
  font-size: 0.94rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 450px;
  padding: 0 24px 22px 24px;
}

/* 页脚样式 (Footer) */
.footer-main {
  background: #040808;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding: 70px 0 30px 0;
  margin-top: 80px;
}

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

.footer-brand-desc {
  color: #94a3b8;
  font-size: 0.92rem;
  line-height: 1.7;
  margin-top: 14px;
  max-width: 360px;
}

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

.footer-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link-list a {
  text-decoration: none;
  color: #94a3b8;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-link-list a:hover {
  color: #34d399;
  padding-left: 4px;
}

.footer-bottom-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 文章详情页专属排版 (Article Details Style) */
.article-header {
  padding: 40px 0 30px 0;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.article-header .breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.article-header .breadcrumb a {
  color: #34d399;
  text-decoration: none;
}

.article-main-title {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 18px;
}

.article-post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.85rem;
  color: #94a3b8;
}

.article-content-body {
  max-width: 860px;
  margin: 0 auto 50px auto;
  background: rgba(11, 23, 23, 0.5);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 48px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-glass);
}

.article-content-body h2 {
  font-size: 1.7rem;
  font-weight: 700;
  color: #f0fdf4;
  margin: 38px 0 16px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(16, 185, 129, 0.2);
}

.article-content-body h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 26px 0 12px 0;
}

.article-content-body p {
  font-size: 1.05rem;
  color: #cbd5e1;
  line-height: 1.85;
  margin-bottom: 20px;
}

.article-content-body ul, .article-content-body ol {
  margin: 16px 0 24px 28px;
  color: #cbd5e1;
  line-height: 1.8;
}

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

.article-content-body blockquote {
  border-left: 4px solid #10b981;
  background: rgba(16, 185, 129, 0.08);
  padding: 16px 22px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  color: #a7f3d0;
  font-style: italic;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 18px;
  padding: 30px;
  text-align: center;
  margin: 40px 0;
}

.article-internal-links-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 16px;
  padding: 24px;
  margin-top: 40px;
}

.article-internal-links-box h4 {
  font-size: 1.1rem;
  color: #34d399;
  margin-bottom: 14px;
}

.internal-link-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.internal-link-grid a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.internal-link-grid a:hover {
  color: #34d399;
}

/* 移动端响应式处理 */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .features-grid, .pricing-grid, .articles-matrix-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ai-banner-box {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-title {
    font-size: 2.4rem;
  }
  .features-grid, .pricing-grid, .articles-matrix-grid, .clients-grid {
    grid-template-columns: 1fr;
  }
  .price-card.featured {
    transform: none;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .article-content-body {
    padding: 24px;
  }
  .article-main-title {
    font-size: 1.8rem;
  }
  .internal-link-grid {
    grid-template-columns: 1fr;
  }
}