/* ==========================================================================
   LinkCube (linkcube.casa) - 官方极速落地页核心样式表
   Pure Native CSS · 0 外部重型框架 · 毫秒级秒开与高转化体验
   ========================================================================== */

:root {
  /* 品牌深邃科技基底配色 */
  --bg-primary: #030712;
  --bg-secondary: #080e1e;
  --bg-tertiary: #0f172a;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(20, 32, 60, 0.9);
  --bg-glass: rgba(8, 14, 30, 0.85);

  --border-color: rgba(16, 185, 129, 0.18);
  --border-hover: rgba(6, 182, 212, 0.45);
  --border-glow: rgba(16, 185, 129, 0.6);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* 品牌翡翠绿与极速赛博青核心渐变 */
  --emerald-primary: #10b981;
  --emerald-hover: #34d399;
  --cyan-primary: #06b6d4;
  --cyan-hover: #22d3ee;
  
  --brand-gradient: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #3b82f6 100%);
  --cyan-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --purple-gradient: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
  --gold-gradient: linear-gradient(135deg, #f59e0b 0%, #eab308 100%);

  --emerald-glow: rgba(16, 185, 129, 0.35);
  --cyan-glow: rgba(6, 182, 212, 0.35);

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 12px 36px -10px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 30px rgba(16, 185, 129, 0.25);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  line-height: 1.68;
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: 1320px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   动态背景系统 (Dynamic Ambient Glows & Drifting Leaves - 纯 CSS 极致轻量)
   ========================================================================== */
.dynamic-bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(130px);
  will-change: transform;
}

.ambient-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.22) 0%, rgba(16, 185, 129, 0) 70%);
  top: -100px;
  left: 5%;
  animation: floatOrb1 24s ease-in-out infinite alternate;
}

.ambient-orb-2 {
  width: 680px;
  height: 680px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.20) 0%, rgba(6, 182, 212, 0) 70%);
  top: 35%;
  right: 5%;
  animation: floatOrb2 28s ease-in-out infinite alternate;
  animation-delay: -6s;
}

.ambient-orb-3 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, rgba(59, 130, 246, 0) 70%);
  bottom: 5%;
  left: 20%;
  animation: floatOrb3 22s ease-in-out infinite alternate;
  animation-delay: -12s;
}

.cyber-grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,1) 0%, rgba(0,0,0,0.3) 70%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,1) 0%, rgba(0,0,0,0.3) 70%, transparent 100%);
  opacity: 0.7;
}

/* 动态背景飘落绿叶系统 (Dynamic Drifting Leaves - 绿叶专线专属视觉) */
.leaves-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.leaf {
  position: absolute;
  top: -15%;
  display: block;
  user-select: none;
  pointer-events: none;
  filter: drop-shadow(0 6px 18px rgba(16, 185, 129, 0.55));
  will-change: transform, top, opacity;
}

.leaf svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* 16 片飘叶参数分布 (大幅放大尺寸：50px ~ 105px 层次错落，气势饱满) */
.leaf-1  { left: 3%;  width: 78px;  height: 78px;  animation: leafFall1 15s linear infinite -2s; }
.leaf-2  { left: 10%; width: 52px;  height: 52px;  animation: leafFall2 20s ease-in-out infinite -7s; opacity: 0.7; }
.leaf-3  { left: 17%; width: 96px;  height: 96px;  animation: leafFall3 13s ease-in infinite -4s; }
.leaf-4  { left: 24%; width: 64px;  height: 64px;  animation: leafFall1 18s ease-in-out infinite -11s; }
.leaf-5  { left: 31%; width: 86px;  height: 86px;  animation: leafFall2 16s linear infinite -6s; }
.leaf-6  { left: 38%; width: 50px;  height: 50px;  animation: leafFall3 22s ease-in-out infinite -14s; opacity: 0.65; }
.leaf-7  { left: 46%; width: 105px; height: 105px; animation: leafFall1 14s ease-in infinite -1s; }
.leaf-8  { left: 53%; width: 68px;  height: 68px;  animation: leafFall2 17s ease-in-out infinite -9s; }
.leaf-9  { left: 60%; width: 90px;  height: 90px;  animation: leafFall3 15s linear infinite -5s; }
.leaf-10 { left: 67%; width: 54px;  height: 54px;  animation: leafFall1 21s ease-in-out infinite -15s; opacity: 0.7; }
.leaf-11 { left: 74%; width: 98px;  height: 98px;  animation: leafFall2 14s ease-in infinite -8s; }
.leaf-12 { left: 81%; width: 62px;  height: 62px;  animation: leafFall3 19s linear infinite -3s; }
.leaf-13 { left: 87%; width: 84px;  height: 84px;  animation: leafFall1 16s ease-in-out infinite -12s; }
.leaf-14 { left: 93%; width: 52px;  height: 52px;  animation: leafFall2 23s ease-in infinite -16s; opacity: 0.65; }
.leaf-15 { left: 14%; width: 74px;  height: 74px;  animation: leafFall3 17s ease-in-out infinite -10s; }
.leaf-16 { left: 69%; width: 82px;  height: 82px;  animation: leafFall1 19s linear infinite -13s; }

@keyframes leafFall1 {
  0% {
    top: -15%;
    transform: translateX(0) rotate(0deg) rotateY(0deg);
    opacity: 0;
  }
  8% {
    opacity: 0.9;
  }
  28% {
    transform: translateX(70px) rotate(50deg) rotateY(180deg);
  }
  50% {
    transform: translateX(-50px) rotate(115deg) rotateY(360deg);
  }
  75% {
    transform: translateX(60px) rotate(220deg) rotateY(180deg);
  }
  92% {
    opacity: 0.9;
  }
  100% {
    top: 112%;
    transform: translateX(-20px) rotate(360deg) rotateY(0deg);
    opacity: 0;
  }
}

@keyframes leafFall2 {
  0% {
    top: -15%;
    transform: translateX(0) rotate(15deg) rotateX(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.82;
  }
  32% {
    transform: translateX(-80px) rotate(-55deg) rotateX(180deg);
  }
  65% {
    transform: translateX(65px) rotate(-150deg) rotateX(360deg);
  }
  90% {
    opacity: 0.82;
  }
  100% {
    top: 112%;
    transform: translateX(-50px) rotate(-310deg) rotateX(180deg);
    opacity: 0;
  }
}

@keyframes leafFall3 {
  0% {
    top: -15%;
    transform: translateX(0) rotate(-20deg) rotateY(45deg);
    opacity: 0;
  }
  12% {
    opacity: 0.92;
  }
  38% {
    transform: translateX(90px) rotate(110deg) rotateY(225deg);
  }
  70% {
    transform: translateX(-70px) rotate(230deg) rotateY(405deg);
  }
  92% {
    opacity: 0.9;
  }
  100% {
    top: 112%;
    transform: translateX(45px) rotate(370deg) rotateY(585deg);
    opacity: 0;
  }
}

/* ==========================================================================
   动态背景系统 - 飘落花瓣动画 (Dynamic Drifting Flower Petals)
   Pure Native CSS · 极致秒开 · GPU 硬件加速
   ========================================================================== */
.petal {
  position: absolute;
  top: -15%;
  display: block;
  user-select: none;
  pointer-events: none;
  filter: drop-shadow(0 6px 20px rgba(244, 63, 94, 0.85));
  will-change: transform, top, opacity;
}

.petal svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* 10 片飘逸娇嫩粉瓣参数分布 (大尺寸 44px ~ 68px，鲜明粉红与绿叶辉映) */
.petal-1  { left: 6%;  width: 56px; height: 56px; animation: petalFlutter1 14s ease-in-out infinite -2s; }
.petal-2  { left: 16%; width: 44px; height: 44px; animation: petalFlutter2 18s linear infinite -7s; opacity: 0.9; }
.petal-3  { left: 27%; width: 64px; height: 64px; animation: petalFlutter3 13s ease-in infinite -1s; }
.petal-4  { left: 37%; width: 48px; height: 48px; animation: petalFlutter1 19s ease-in-out infinite -10s; }
.petal-5  { left: 48%; width: 60px; height: 60px; animation: petalFlutter2 15s ease-out infinite -4s; }
.petal-6  { left: 59%; width: 42px; height: 42px; animation: petalFlutter3 21s linear infinite -14s; opacity: 0.85; }
.petal-7  { left: 70%; width: 68px; height: 68px; animation: petalFlutter1 16s ease-in-out infinite -8s; }
.petal-8  { left: 80%; width: 46px; height: 46px; animation: petalFlutter2 18s ease-in infinite -3s; opacity: 0.9; }
.petal-9  { left: 88%; width: 58px; height: 58px; animation: petalFlutter3 14s ease-out infinite -11s; }
.petal-10 { left: 94%; width: 44px; height: 44px; animation: petalFlutter1 20s ease-in-out infinite -6s; opacity: 0.85; }

@keyframes petalFlutter1 {
  0% {
    top: -10%;
    transform: translateX(0) rotate(0deg) rotateY(0deg) rotateX(0deg);
    opacity: 0;
  }
  8% {
    opacity: 0.88;
  }
  25% {
    transform: translateX(45px) rotate(60deg) rotateY(180deg) rotateX(45deg);
  }
  50% {
    transform: translateX(-35px) rotate(135deg) rotateY(360deg) rotateX(90deg);
  }
  75% {
    transform: translateX(50px) rotate(240deg) rotateY(180deg) rotateX(45deg);
  }
  92% {
    opacity: 0.85;
  }
  100% {
    top: 110%;
    transform: translateX(-15px) rotate(360deg) rotateY(0deg) rotateX(0deg);
    opacity: 0;
  }
}

@keyframes petalFlutter2 {
  0% {
    top: -12%;
    transform: translateX(0) rotate(30deg) rotateZ(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.82;
  }
  30% {
    transform: translateX(-55px) rotate(-45deg) rotateY(180deg);
  }
  65% {
    transform: translateX(40px) rotate(-160deg) rotateY(360deg);
  }
  90% {
    opacity: 0.82;
  }
  100% {
    top: 110%;
    transform: translateX(-30px) rotate(-330deg) rotateY(180deg);
    opacity: 0;
  }
}

@keyframes petalFlutter3 {
  0% {
    top: -10%;
    transform: translateX(0) rotate(-15deg) rotateY(45deg);
    opacity: 0;
  }
  12% {
    opacity: 0.9;
  }
  35% {
    transform: translateX(65px) rotate(90deg) rotateY(225deg);
  }
  70% {
    transform: translateX(-45px) rotate(210deg) rotateY(405deg);
  }
  92% {
    opacity: 0.85;
  }
  100% {
    top: 110%;
    transform: translateX(25px) rotate(340deg) rotateY(585deg);
    opacity: 0;
  }
}

@keyframes floatOrb1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(90px, 80px) scale(1.18); }
  100% { transform: translate(-50px, 110px) scale(0.92); }
}

@keyframes floatOrb2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-100px, -60px) scale(1.12); }
  100% { transform: translate(60px, -90px) scale(0.95); }
}

@keyframes floatOrb3 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(70px, -70px) scale(1.15); }
  100% { transform: translate(-60px, 60px) scale(0.9); }
}

/* ==========================================================================
   导航头部组件 (Site Header & Logo)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: var(--transition);
}

.site-logo:hover {
  transform: translateY(-1px);
}

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

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-gradient);
  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;
}

/* 按钮通用系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #ffffff;
  box-shadow: 0 4px 18px var(--emerald-glow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(16, 185, 129, 0.5);
  filter: brightness(1.1);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--cyan-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-lg {
  font-size: 1.05rem;
  padding: 14px 30px;
  border-radius: 10px;
}

.btn-sm {
  font-size: 0.85rem;
  padding: 6px 14px;
}

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

/* ==========================================================================
   Hero 首屏视觉区域
   ========================================================================== */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

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

@keyframes pulseDot {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.badge-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: #6ee7b7;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: #ffffff;
}

.text-gradient {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-cyan {
  background: var(--cyan-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(1.02rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 880px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

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

/* 核心指标统计条 */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

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

.stat-num {
  font-size: 1.9rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #ffffff;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   通用 Section 头部标题
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 840px;
  margin: 0 auto 52px;
}

.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--emerald-primary);
  margin-bottom: 12px;
  padding: 4px 14px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   套餐价格区域 - 核心规范：所有价格同排排列 (Desktop 4 Columns Row)
   ========================================================================== */
.pricing-section {
  padding: 90px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(6, 182, 212, 0.04) 50%, transparent 100%);
}

.pricing-cycle-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 0 auto 46px;
  background: rgba(15, 23, 42, 0.9);
  padding: 6px;
  border-radius: var(--radius-full);
  width: fit-content;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
}

.cycle-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 9px 22px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.cycle-btn.active {
  background: var(--brand-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--emerald-glow);
}

.save-pill {
  font-size: 0.72rem;
  padding: 2px 7px;
  background: #f59e0b;
  color: #000000;
  font-weight: 800;
  border-radius: var(--radius-full);
}

/* 4 大套餐同排排列 - 严格水平一行 */
.pricing-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}

.price-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.8), var(--shadow-glow);
}

.price-card.popular {
  border-color: var(--emerald-primary);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.12) 0%, rgba(15, 23, 42, 0.85) 40%);
  box-shadow: 0 15px 35px -5px rgba(16, 185, 129, 0.25);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-gradient);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px var(--emerald-glow);
  text-transform: uppercase;
}

.plan-top-info {
  margin-bottom: 22px;
}

.plan-tier-badge {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  text-transform: uppercase;
  display: block;
  margin-bottom: 6px;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-summary {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.5;
  min-height: 42px;
}

.price-amount-box {
  margin: 18px 0;
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.price-main {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

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

.price-number {
  font-size: 2.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #ffffff;
  line-height: 1;
}

.price-cycle {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.price-equivalent {
  font-size: 0.8rem;
  color: #6ee7b7;
  margin-top: 6px;
  font-weight: 500;
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.plan-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

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

.plan-features-list strong {
  color: #ffffff;
}

.price-cta-btn {
  width: 100%;
  margin-top: auto;
}

/* ==========================================================================
   技术核心卖点区域 (Features)
   ========================================================================== */
.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-lg);
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-box:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card);
}

.feature-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--brand-gradient);
  opacity: 0;
  transition: var(--transition);
}

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

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 22px;
  color: var(--emerald-primary);
}

.feature-heading {
  font-size: 1.28rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   全球节点实测与流媒体解锁状态 (Nodes & Status)
   ========================================================================== */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.node-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

.node-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.node-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.node-flag {
  font-size: 1.8rem;
  line-height: 1;
}

.node-name {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
}

.node-isp {
  font-size: 0.8rem;
  color: var(--cyan-primary);
}

.node-right {
  text-align: right;
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: #10b981;
}

.node-type {
  font-size: 0.74rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ==========================================================================
   全平台客户端支持 (Clients)
   ========================================================================== */
.client-platforms-row {
  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-md);
  padding: 26px 22px;
  text-align: center;
  transition: var(--transition);
}

.client-card:hover {
  transform: translateY(-5px);
  border-color: var(--cyan-primary);
}

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

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

.client-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   用户真实评价 (Testimonials)
   ========================================================================== */
.testimonials-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-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}

.review-stars {
  color: #f59e0b;
  font-size: 1rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  flex-shrink: 0;
}

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

.author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   常见问题 FAQ 手风琴
   ========================================================================== */
.faq-accordion {
  max-width: 920px;
  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-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--border-hover);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-chevron {
  font-size: 1.2rem;
  color: var(--emerald-primary);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 26px 24px 26px;
}

/* ==========================================================================
   精选深度文章专栏 (Articles Section)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan-primary);
  box-shadow: var(--shadow-card);
}

.article-category {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--emerald-primary);
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  width: fit-content;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 10px;
  transition: var(--transition);
}

.article-card:hover .article-title {
  color: var(--cyan-hover);
}

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

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.article-read-more {
  color: var(--emerald-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   生态外链区域 (External Links)
   ========================================================================== */
.external-links-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 24px;
}

.ext-link-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.ext-link-pill:hover {
  border-color: var(--cyan-primary);
  color: #ffffff;
  background: rgba(6, 182, 212, 0.1);
  transform: translateY(-2px);
}

/* ==========================================================================
   页尾 Footer
   ========================================================================== */
.site-footer {
  background: #02040a;
  border-top: 1px solid var(--border-color);
  padding: 70px 0 35px;
  position: relative;
  z-index: 2;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  max-width: 380px;
  margin-top: 16px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
}

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

.footer-links-list a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links-list a:hover {
  color: var(--cyan-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 28px;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   响应式断点控制
   ========================================================================== */
@media (max-width: 1200px) {
  .pricing-row {
    gap: 14px;
  }
  .price-card {
    padding: 24px 18px;
  }
  .price-number {
    font-size: 2.2rem;
  }
}

@media (max-width: 992px) {
  .pricing-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .client-platforms-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-item:nth-child(2) {
    border-right: none;
  }
}

@media (max-width: 768px) {
  .leaf, .petal {
    transform-origin: center center;
    scale: 0.75;
  }
  .nav-menu {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 15px 30px rgba(0,0,0,0.5);
  }
  .pricing-row {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }
  .features-grid, .articles-grid, .testimonials-grid, .nodes-grid, .client-platforms-row {
    grid-template-columns: 1fr;
  }
  .hero-stats-row {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 14px;
  }
  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}