/* ==========================================================================
   五树云 (WushuCloud.buzz) - 原生现代化高性能样式库
   特点：纯原生 CSS3、零外部框架、极致性能、秒开加载、全端自适应响应式
   ========================================================================== */

:root {
  --bg-primary: #070b14;
  --bg-secondary: #0d1424;
  --bg-tertiary: #131c31;
  --bg-card: rgba(16, 24, 43, 0.75);
  --bg-card-hover: rgba(22, 33, 58, 0.88);
  --bg-card-popular: rgba(15, 30, 56, 0.85);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(16, 185, 129, 0.4);
  --border-cyan: rgba(6, 182, 212, 0.4);
  
  --primary: #10b981;
  --primary-hover: #059669;
  --primary-glow: rgba(16, 185, 129, 0.25);
  
  --cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.25);
  --blue: #3b82f6;
  --purple: #8b5cf6;
  --amber: #f59e0b;
  --rose: #f43f5e;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-light: #cbd5e1;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.25);
  --shadow-cyan-glow: 0 0 35px rgba(6, 182, 212, 0.25);
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* ==========================================================================
   纯原生 CSS 高画质金秋动态背景：实景秋色呼吸漫游 + 飘落枫叶银杏 + 暖阳丁达尔微光
   ========================================================================== */
.dynamic-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -10;
  pointer-events: none;
  overflow: hidden;
  background-color: #060911;
}

/* 1. 高画质秋日实景动态背景层（超清金秋枫林、碧湖晨雾，轻微运镜呼吸感） */
.autumn-bg-image {
  position: absolute;
  inset: -20px;
  background-image: url('assets/autumn-scenery-bg.jpg');
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
  filter: brightness(0.65) contrast(1.12) saturate(1.22);
  transform: scale(1.02);
  animation: autumnCinematicMove 32s ease-in-out infinite alternate;
  will-change: transform;
}

@keyframes autumnCinematicMove {
  0% { transform: scale(1.02) translate(0, 0); }
  50% { transform: scale(1.06) translate(-1.5%, -1%); }
  100% { transform: scale(1.03) translate(1%, 0.5%); }
}

/* 2. 电影级暗角与金秋景深柔光遮罩（确保前景色文字秒读、不抢视觉焦点） */
.autumn-overlay {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 75% 15%, rgba(251, 191, 36, 0.18) 0%, transparent 55%),
    linear-gradient(180deg, rgba(6, 9, 17, 0.42) 0%, rgba(7, 11, 20, 0.72) 40%, rgba(6, 9, 17, 0.92) 100%);
  mix-blend-mode: multiply;
}

/* 3. 金秋暖阳丁达尔漫射微光脉冲 */
.autumn-sun-glow {
  position: absolute;
  top: -15%;
  right: 8%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(251, 191, 36, 0.28) 0%, rgba(245, 158, 11, 0.1) 45%, transparent 70%);
  filter: blur(85px);
  animation: sunGlowBreath 16s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes sunGlowBreath {
  0% { opacity: 0.5; transform: scale(0.95); }
  50% { opacity: 0.95; transform: scale(1.15); }
  100% { opacity: 0.6; transform: scale(1); }
}

/* 4. 纯原生 CSS 动态飘落枫叶与银杏叶（60fps 硬件加速，无需任何外部 JS） */
.autumn-leaves-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.leaf {
  position: absolute;
  top: -60px;
  background-size: contain;
  background-repeat: no-repeat;
  will-change: transform, opacity;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.4));
}

/* 枫叶 SVG 造型 (红橙金琥珀渐变色系) */
.leaf-maple-orange {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' fill='%23ea580c'%3E%3Cpath d='M32 2 L35 15 L45 8 L42 21 L56 18 L46 29 L60 35 L47 41 L53 52 L39 47 L34 62 L30 62 L25 47 L11 52 L17 41 L4 35 L18 29 L8 18 L22 21 L19 8 L29 15 Z'/%3E%3C/svg%3E");
}

.leaf-maple-red {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' fill='%23dc2626'%3E%3Cpath d='M32 2 L36 18 L50 14 L44 26 L58 32 L46 38 L54 50 L38 46 L33 62 L31 62 L26 46 L10 50 L18 38 L6 32 L20 26 L14 14 L28 18 Z'/%3E%3C/svg%3E");
}

/* 银杏叶 SVG 造型 (金黄色系) */
.leaf-ginkgo-gold {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' fill='%23f59e0b'%3E%3Cpath d='M32 60 C32 45 28 35 12 30 C-2 25 2 10 18 6 C26 4 30 8 32 12 C34 8 38 4 46 6 C62 10 66 25 52 30 C36 35 32 45 32 60 Z'/%3E%3C/svg%3E");
}

.leaf-ginkgo-yellow {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' fill='%23fde047'%3E%3Cpath d='M32 4 C48 16 52 38 32 60 C12 38 16 16 32 4 Z'/%3E%3C/svg%3E");
}

/* 飘落动画轨迹 1：轻柔悠扬飘摆 */
@keyframes fallGentle {
  0% {
    transform: translateY(-80px) translateX(0) rotate(0deg) scale(0.9);
    opacity: 0;
  }
  12% {
    opacity: 0.85;
  }
  50% {
    transform: translateY(50vh) translateX(65px) rotate(170deg) scale(1.05);
    opacity: 0.95;
  }
  85% {
    opacity: 0.75;
  }
  100% {
    transform: translateY(112vh) translateX(-45px) rotate(350deg) scale(0.85);
    opacity: 0;
  }
}

/* 飘落动画轨迹 2：3D 翻转旋舞 */
@keyframes fallSway {
  0% {
    transform: translateY(-80px) translateX(0) rotate(0deg) rotateY(0deg);
    opacity: 0;
  }
  12% {
    opacity: 0.85;
  }
  50% {
    transform: translateY(55vh) translateX(-75px) rotate(-160deg) rotateY(180deg);
    opacity: 0.9;
  }
  85% {
    opacity: 0.7;
  }
  100% {
    transform: translateY(112vh) translateX(55px) rotate(-340deg) rotateY(360deg);
    opacity: 0;
  }
}

/* 飘落动画轨迹 3：秋风轻旋 */
@keyframes fallSwirl {
  0% {
    transform: translateY(-80px) translateX(0) rotate(0deg) scale(1);
    opacity: 0;
  }
  10% {
    opacity: 0.9;
  }
  35% {
    transform: translateY(35vh) translateX(85px) rotate(120deg) scale(1.1);
  }
  70% {
    transform: translateY(75vh) translateX(-35px) rotate(260deg) scale(0.95);
    opacity: 0.85;
  }
  100% {
    transform: translateY(112vh) translateX(65px) rotate(420deg) scale(0.8);
    opacity: 0;
  }
}

/* 10片叶子的独立位置、大小、延时与动效绑定 */
.leaf-1 {
  left: 6%;
  width: 28px;
  height: 28px;
  animation: fallGentle 17s ease-in-out infinite;
  animation-delay: 0s;
}

.leaf-2 {
  left: 18%;
  width: 22px;
  height: 22px;
  animation: fallSway 22s ease-in-out infinite;
  animation-delay: -6s;
}

.leaf-3 {
  left: 32%;
  width: 32px;
  height: 32px;
  animation: fallSwirl 19s ease-in-out infinite;
  animation-delay: -11s;
}

.leaf-4 {
  left: 45%;
  width: 24px;
  height: 24px;
  animation: fallGentle 25s ease-in-out infinite;
  animation-delay: -4s;
}

.leaf-5 {
  left: 58%;
  width: 29px;
  height: 29px;
  animation: fallSway 18s ease-in-out infinite;
  animation-delay: -13s;
}

.leaf-6 {
  left: 72%;
  width: 22px;
  height: 22px;
  animation: fallSwirl 24s ease-in-out infinite;
  animation-delay: -8s;
}

.leaf-7 {
  left: 85%;
  width: 27px;
  height: 27px;
  animation: fallGentle 20s ease-in-out infinite;
  animation-delay: -15s;
}

.leaf-8 {
  left: 12%;
  width: 25px;
  height: 25px;
  animation: fallSway 27s ease-in-out infinite;
  animation-delay: -9s;
}

.leaf-9 {
  left: 52%;
  width: 21px;
  height: 21px;
  animation: fallGentle 16s ease-in-out infinite;
  animation-delay: -14s;
}

.leaf-10 {
  left: 80%;
  width: 30px;
  height: 30px;
  animation: fallSwirl 21s ease-in-out infinite;
  animation-delay: -2s;
}

/* ==========================================================================
   排版与通用组件
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-grad {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-grad-gold {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.section-head {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   顶部导航栏（左上方高亮 Logo）
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

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

/* 左上方 Logo 样式 */
.brand-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.brand-logo-link:hover {
  transform: scale(1.02);
}

.brand-logo-img {
  height: 44px;
  width: auto;
  display: block;
}

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

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover,
.nav-link.active {
  color: #38bdf8;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  transition: width 0.25s ease;
  border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

/* 按钮通用规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #ffffff 0%, #fefce8 25%, #fef08a 65%, #fde68a 100%);
  color: #090e1a;
  font-weight: 800;
  border: 1px solid rgba(254, 240, 138, 0.55);
  box-shadow: 0 4px 18px rgba(254, 240, 138, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #ffffff 0%, #fef9c3 40%, #fef08a 100%);
  box-shadow: 0 6px 26px rgba(254, 240, 138, 0.55);
  color: #090e1a;
  transform: translateY(-2px);
}

.btn-cyan {
  background: linear-gradient(135deg, #06b6d4 0%, #0284c7 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.35);
}

.btn-cyan:hover {
  background: linear-gradient(135deg, #22d3ee 0%, #06b6d4 100%);
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.55);
  transform: translateY(-2px);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-glow {
  background: linear-gradient(135deg, #ffffff 0%, #fffbeb 20%, #fef08a 60%, #fde047 100%);
  color: #090e1a;
  font-weight: 800;
  border: 1px solid rgba(254, 240, 138, 0.6);
  box-shadow: 0 4px 24px rgba(254, 240, 138, 0.45), 0 0 16px rgba(253, 224, 71, 0.25);
  position: relative;
  overflow: hidden;
}

.btn-glow:hover {
  background: linear-gradient(135deg, #ffffff 0%, #fef9c3 35%, #facc15 100%);
  box-shadow: 0 6px 32px rgba(254, 240, 138, 0.65), 0 0 24px rgba(253, 224, 71, 0.4);
  color: #090e1a;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.08rem;
  border-radius: var(--radius-lg);
}

.btn-full {
  width: 100%;
}

/* ==========================================================================
   Hero 主视觉区
   ========================================================================== */
.hero-section {
  padding: 75px 0 65px;
  text-align: center;
  position: relative;
}

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  margin-bottom: 26px;
  font-size: 0.9rem;
  color: #34d399;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.3rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  color: var(--text-secondary);
  max-width: 890px;
  margin: 0 auto 38px;
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

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

.hero-guarantee-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-guarantee-item span {
  color: var(--primary);
  font-weight: 700;
}

/* 实时专线监控指标条 */
.status-bar-wrap {
  margin-top: 50px;
  background: rgba(13, 20, 36, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 24px 30px;
  backdrop-filter: blur(12px);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  box-shadow: var(--shadow-sm);
}

.status-stat-item {
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.status-stat-item:last-child {
  border-right: none;
}

.stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.86rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   价格方案区：重点！所有价格要同排 (Pricing Same Row Grid)
   ========================================================================== */
.pricing-section {
  position: relative;
  background: linear-gradient(180deg, rgba(7, 11, 20, 0) 0%, rgba(13, 20, 36, 0.6) 50%, rgba(7, 11, 20, 0) 100%);
}

.pricing-notice-banner {
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  text-align: center;
  max-width: 860px;
  margin: -25px auto 40px;
  color: #67e8f9;
  font-size: 0.94rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

/* 核心：桌面端严格 4 列同排 (repeat(4, 1fr)) */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px 24px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(6, 182, 212, 0.45);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5), 0 0 25px rgba(6, 182, 212, 0.2);
}

/* 爆款高亮卡片 */
.pricing-card.is-popular {
  background: var(--bg-card-popular);
  border: 1.8px solid #10b981;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5), 0 0 35px rgba(16, 185, 129, 0.3);
  transform: scale(1.02);
}

.pricing-card.is-popular:hover {
  transform: scale(1.03) translateY(-6px);
  border-color: #34d399;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.6), 0 0 45px rgba(16, 185, 129, 0.45);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: #ffffff;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

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

.plan-tier-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}

.plan-name {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.plan-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  min-height: 42px;
}

.price-display-box {
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 20px;
}

.price-main {
  display: flex;
  align-items: baseline;
  justify-content: flex-start;
  gap: 4px;
  margin-bottom: 10px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1;
}

.price-cycle {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.price-discount-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.price-discount-item {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.price-discount-item strong {
  color: #38bdf8;
  font-weight: 700;
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.45;
}

.feature-icon-check {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: #10b981;
  margin-top: 2px;
}

.feature-item strong {
  color: var(--text-primary);
}

.card-action-btn-wrap {
  margin-top: auto;
}

/* ==========================================================================
   核心优势区
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: var(--shadow-glow);
}

.feature-box-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: var(--primary);
}

.feature-box-title {
  font-size: 1.28rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* ==========================================================================
   节点矩阵与全球测速
   ========================================================================== */
.node-matrix-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.node-table th {
  background: rgba(255, 255, 255, 0.03);
  padding: 16px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.node-table td {
  padding: 16px 20px;
  font-size: 0.92rem;
  color: var(--text-light);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.node-table tr:last-child td {
  border-bottom: none;
}

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

.node-location-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--text-primary);
}

.ping-tag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.status-online {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #34d399;
  font-weight: 600;
}

/* ==========================================================================
   客户端生态一键导入引导
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.client-card:hover {
  transform: translateY(-5px);
  border-color: rgba(6, 182, 212, 0.4);
}

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

.client-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.client-card-platform {
  font-size: 0.82rem;
  color: var(--cyan);
  margin-bottom: 10px;
}

.client-card-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   文章与知识库聚合区 (Articles Grid)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: rgba(16, 185, 129, 0.45);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-category {
  color: var(--primary);
  font-weight: 700;
  background: rgba(16, 185, 129, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.article-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
  font-size: 0.85rem;
  color: #38bdf8;
  font-weight: 600;
}

/* ==========================================================================
   最下方要求：用户真实评价 (Reviews Section)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(251, 191, 36, 0.35);
}

.review-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
  font-style: normal;
}

.reviewer-box {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #ffffff;
}

.reviewer-info-name {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-primary);
}

.reviewer-info-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.verified-badge {
  color: #10b981;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

/* ==========================================================================
   最下方要求：常见问题 FAQ (FAQ Section - 原生无需 JS)
   ========================================================================== */
.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item[open] {
  border-color: rgba(16, 185, 129, 0.35);
  background: rgba(19, 28, 49, 0.8);
}

.faq-summary {
  padding: 22px 26px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  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-summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--primary);
  font-weight: 400;
  line-height: 1;
  transition: transform 0.25s ease;
}

.faq-item[open] .faq-summary::after {
  transform: rotate(45deg);
  color: #f43f5e;
}

.faq-content {
  padding: 0 26px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

.faq-content p + p {
  margin-top: 12px;
}

/* ==========================================================================
   外链与权威参考伙伴 (Outbound Links Section)
   ========================================================================== */
.outbound-links-section {
  padding: 45px 0 60px;
  border-top: 1px solid var(--border-color);
}

.outbound-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.outbound-card {
  background: rgba(16, 24, 43, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.outbound-card:hover {
  background: rgba(22, 33, 58, 0.8);
  border-color: rgba(6, 182, 212, 0.4);
  transform: translateY(-3px);
}

.outbound-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.outbound-desc {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   文章详情页专用样式 (Article Layout)
   ========================================================================== */
.article-header {
  padding: 60px 0 40px;
  background: linear-gradient(180deg, rgba(13, 20, 36, 0.7) 0%, rgba(7, 11, 20, 0) 100%);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.breadcrumb-nav a:hover {
  color: var(--primary);
}

.article-main-title {
  font-size: clamp(1.8rem, 3.8vw, 2.7rem);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.article-info-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-info-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  padding: 60px 0 90px;
  align-items: start;
}

.article-body {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 45px 40px;
  color: var(--text-light);
  line-height: 1.85;
  font-size: 1.05rem;
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-body h2:first-of-type {
  margin-top: 0;
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #38bdf8;
  margin: 28px 0 14px;
}

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

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
}

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

.article-body strong {
  color: #f8fafc;
  font-weight: 700;
}

.article-body a {
  color: #34d399;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: var(--transition);
}

.article-body a:hover {
  color: #38bdf8;
}

.article-callout {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin: 28px 0;
}

.article-callout.warning {
  background: rgba(245, 158, 11, 0.08);
  border-left-color: var(--amber);
}

.article-callout-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  margin: 40px 0;
}

.article-cta-box h3 {
  margin-top: 0;
  color: #ffffff;
  font-size: 1.35rem;
}

.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: 28px;
  position: sticky;
  top: 95px;
}

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

.sidebar-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.sidebar-article-item a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.45;
  display: block;
  transition: var(--transition);
}

.sidebar-article-item a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.sidebar-promo {
  background: linear-gradient(145deg, rgba(16, 185, 129, 0.12), rgba(6, 182, 212, 0.12));
  border: 1px solid rgba(16, 185, 129, 0.3);
  text-align: center;
}

.sidebar-promo-price {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary);
  font-family: var(--font-mono);
  margin: 10px 0 16px;
}

/* 相关文章卡片 */
.related-articles-section {
  padding: 40px 0 70px;
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   页脚与版权区
   ========================================================================== */
.site-footer {
  background: #04070e;
  border-top: 1px solid var(--border-color);
  padding: 65px 0 35px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 45px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 16px 0 22px;
  max-width: 360px;
}

.footer-heading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
}

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

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.seo-keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.seo-kw-pill {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
  text-decoration: none;
  transition: var(--transition);
}

.seo-kw-pill:hover {
  color: var(--primary);
  border-color: rgba(16, 185, 129, 0.3);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   响应式断点控制
   ========================================================================== */
@media (max-width: 1200px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }
  .pricing-card {
    padding: 24px 18px 22px;
  }
  .plan-name {
    font-size: 1.35rem;
  }
  .price-amount {
    font-size: 2.3rem;
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .nav-menu {
    display: none; /* 移动端精简模式 */
  }
  .pricing-grid-same-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .outbound-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }
  .status-bar-wrap {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 18px;
  }
  .status-stat-item:nth-child(2) {
    border-right: none;
  }
  .pricing-grid-same-row {
    grid-template-columns: 1fr;
  }
  .pricing-card.is-popular {
    transform: none;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .clients-grid {
    grid-template-columns: 1fr;
  }
  .outbound-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .article-body {
    padding: 26px 20px;
  }
}