/* ==========================================================================
   山水云 ShanShuiYun - 光纤山游 + 数据潜行 + 赛博科技 原生样式表
   ========================================================================== */

:root {
  --bg-primary: #0F0820;
  --bg-secondary: rgba(22, 12, 44, 0.72);
  --bg-card: rgba(24, 14, 48, 0.76);
  --bg-card-hover: rgba(34, 19, 66, 0.92);
  --border-subtle: rgba(255, 255, 255, 0.14);
  --border-accent: rgba(236, 72, 153, 0.5);
  --text-main: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.78);
  --text-muted: rgba(255, 255, 255, 0.65);
  --brand-pink: #EC4899;
  --brand-cyan: #22D3EE;
  --brand-jade: #22D3EE;
  --gradient-brand: linear-gradient(135deg, #EC4899 0%, #22D3EE 100%);
  --shadow-card: 0 14px 36px -8px rgba(5, 2, 12, 0.75);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --container-width: 1180px;
}

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

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

[id] {
  scroll-margin-top: 92px;
}

body {
  font-family: 'Inter', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  overflow-wrap: break-word;
  word-break: break-word;
  position: relative;
}

/* 跳转到主要内容 (Skip Link 无障碍键盘入口) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  padding: 10px 18px;
  background: var(--gradient-brand);
  color: #FFFFFF;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.8);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  outline: 2px solid #FFFFFF;
  outline-offset: 2px;
}

/* 键盘焦点样式 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand-cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   赛博背景动效层 (20条光纤流 + 径向渐隐细网格 + 双呼吸光晕)
   ========================================================================== */
.cyber-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background-color: #0F0820;
}

/* 2个粉/青大型 blur 光晕缓慢呼吸缩放 */
.cyber-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.32;
  animation: orbBreathe 9s ease-in-out infinite alternate;
}

.cyber-orb.orb-pink {
  width: 540px;
  height: 540px;
  background: radial-gradient(circle, #EC4899 0%, transparent 70%);
  top: -120px;
  left: -100px;
}

.cyber-orb.orb-cyan {
  width: 580px;
  height: 580px;
  background: radial-gradient(circle, #22D3EE 0%, transparent 70%);
  bottom: -140px;
  right: -120px;
  animation-delay: -4.5s;
}

@keyframes orbBreathe {
  0% {
    transform: scale(0.85) translate(0, 0);
    opacity: 0.24;
  }
  100% {
    transform: scale(1.22) translate(25px, -20px);
    opacity: 0.42;
  }
}

/* 细网格线（带 radial mask 让边缘渐隐） */
.cyber-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(236, 72, 153, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 211, 238, 0.08) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(circle at 50% 42%, rgba(0, 0, 0, 0.95) 15%, rgba(0, 0, 0, 0.35) 58%, transparent 88%);
  mask-image: radial-gradient(circle at 50% 42%, rgba(0, 0, 0, 0.95) 15%, rgba(0, 0, 0, 0.35) 58%, transparent 88%);
}

/* 20 条粉/青色光纤线条从顶部斜向下穿过屏幕到底部（1-2.5秒一周期，角度各异 ±30°） */
.fiber-lines {
  position: absolute;
  inset: 0;
}

.fiber-line {
  position: absolute;
  top: -35vh;
  width: 2px;
  height: 28vh;
  border-radius: 999px;
  opacity: 0;
  transform-origin: center top;
  animation: fiberStream linear infinite;
}

.fiber-line.pink {
  background: linear-gradient(180deg, transparent 0%, #EC4899 55%, #FFFFFF 100%);
  box-shadow: 0 0 12px #EC4899, 0 0 24px rgba(236, 72, 153, 0.8);
}

.fiber-line.cyan {
  background: linear-gradient(180deg, transparent 0%, #22D3EE 55%, #FFFFFF 100%);
  box-shadow: 0 0 12px #22D3EE, 0 0 24px rgba(34, 211, 238, 0.8);
}

@keyframes fiberStream {
  0% {
    transform: translateY(0) rotate(var(--angle, 15deg)) scaleY(0.7);
    opacity: 0;
  }
  15% {
    opacity: 0.78;
  }
  85% {
    opacity: 0.78;
  }
  100% {
    transform: translateY(155vh) rotate(var(--angle, 15deg)) scaleY(1.15);
    opacity: 0;
  }
}

.fiber-line.f1  { left: 4%;  --angle: -26deg; animation-duration: 1.35s; animation-delay: 0.1s; }
.fiber-line.f2  { left: 9%;  --angle: 18deg;  animation-duration: 1.95s; animation-delay: 0.4s; }
.fiber-line.f3  { left: 14%; --angle: -14deg; animation-duration: 1.15s; animation-delay: 0.8s; }
.fiber-line.f4  { left: 19%; --angle: 28deg;  animation-duration: 2.30s; animation-delay: 0.2s; }
.fiber-line.f5  { left: 24%; --angle: -22deg; animation-duration: 1.60s; animation-delay: 1.1s; }
.fiber-line.f6  { left: 29%; --angle: 12deg;  animation-duration: 2.10s; animation-delay: 0.5s; }
.fiber-line.f7  { left: 34%; --angle: -29deg; animation-duration: 1.05s; animation-delay: 0.9s; }
.fiber-line.f8  { left: 39%; --angle: 24deg;  animation-duration: 1.75s; animation-delay: 0.3s; }
.fiber-line.f9  { left: 44%; --angle: -18deg; animation-duration: 2.45s; animation-delay: 1.4s; }
.fiber-line.f10 { left: 49%; --angle: 15deg;  animation-duration: 1.25s; animation-delay: 0.6s; }
.fiber-line.f11 { left: 54%; --angle: -25deg; animation-duration: 1.85s; animation-delay: 0.15s; }
.fiber-line.f12 { left: 59%; --angle: 29deg;  animation-duration: 2.20s; animation-delay: 1.0s; }
.fiber-line.f13 { left: 64%; --angle: -11deg; animation-duration: 1.40s; animation-delay: 0.7s; }
.fiber-line.f14 { left: 69%; --angle: 21deg;  animation-duration: 1.10s; animation-delay: 1.3s; }
.fiber-line.f15 { left: 74%; --angle: -27deg; animation-duration: 2.05s; animation-delay: 0.25s; }
.fiber-line.f16 { left: 79%; --angle: 16deg;  animation-duration: 1.50s; animation-delay: 0.95s; }
.fiber-line.f17 { left: 84%; --angle: -19deg; animation-duration: 2.40s; animation-delay: 0.45s; }
.fiber-line.f18 { left: 89%; --angle: 26deg;  animation-duration: 1.30s; animation-delay: 1.2s; }
.fiber-line.f19 { left: 93%; --angle: -15deg; animation-duration: 1.70s; animation-delay: 0.35s; }
.fiber-line.f20 { left: 97%; --angle: 22deg;  animation-duration: 2.50s; animation-delay: 0.85s; }

/* ==========================================================================
   顶部页眉与导航目录 (Header & Navigation Directory)
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 8, 32, 0.84);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 16px;
  flex-wrap: wrap;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
}

.brand-logo svg {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.brand-sub {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--brand-cyan);
  margin-left: 5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 6px 4px;
  position: relative;
}

.nav-links a:hover {
  color: var(--text-main);
  text-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
}

.nav-links a.nav-highlight {
  color: #FFFFFF;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.25), rgba(34, 211, 238, 0.25));
  border: 1px solid rgba(236, 72, 153, 0.55);
  padding: 5px 14px;
  border-radius: 12px;
  box-shadow: 0 0 18px rgba(236, 72, 153, 0.35);
}

.nav-links a.nav-highlight:hover {
  border-color: var(--brand-cyan);
  box-shadow: 0 0 22px rgba(34, 211, 238, 0.6);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ==========================================================================
   按钮组件 (CTA Buttons：粉到青渐变，圆角12px，30px粉辉光，hover变青辉光)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  border-radius: 12px;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.btn-sm {
  padding: 9px 20px;
  font-size: 0.9rem;
  min-height: 40px;
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.05rem;
  min-height: 52px;
}

.btn-block {
  width: 100%;
  padding: 14px 24px;
  font-size: 1rem;
  min-height: 50px;
}

.btn-primary {
  background: linear-gradient(135deg, #EC4899 0%, #22D3EE 100%);
  color: #FFFFFF;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: 0 0 30px rgba(236, 72, 153, 0.65);
  text-shadow: 0 1px 4px rgba(15, 8, 32, 0.5);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.85);
}

.btn-outline {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.16) 0%, rgba(34, 211, 238, 0.16) 100%);
  color: #FFFFFF;
  border: 1px solid rgba(236, 72, 153, 0.55);
  box-shadow: 0 0 30px rgba(236, 72, 153, 0.32);
}

.btn-outline:hover {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.28) 0%, rgba(34, 211, 238, 0.28) 100%);
  border-color: #22D3EE;
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.75);
}

/* ==========================================================================
   主视觉区 (Hero Section - 左侧大标题 + 右侧3D光纤隧道山水动画)
   ========================================================================== */
.hero {
  position: relative;
  padding: 76px 0 68px;
  text-align: center;
  overflow: hidden;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.14);
  border: 1px solid rgba(236, 72, 153, 0.45);
  color: var(--brand-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 26px;
  box-shadow: 0 0 20px rgba(236, 72, 153, 0.25);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-pink);
  box-shadow: 0 0 10px var(--brand-pink), 0 0 18px var(--brand-cyan);
}

/* 大标题左右布局：左侧H1「山水云」+ 右侧3D光纤隧道与山水SVG */
.hero-headline-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  max-width: 980px;
  margin: 0 auto 28px;
  text-align: left;
}

.hero-headline-left {
  flex: 1;
}

.hero h1 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: clamp(2.2rem, 4.5vw, 3.55rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

/* 标题文字带粉到青的渐变 + 双层文字阴影辉光 */
.text-gradient {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-weight: 700;
  background: linear-gradient(135deg, #EC4899 0%, #22D3EE 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 24px rgba(236, 72, 153, 0.45), 0 0 48px rgba(34, 211, 238, 0.35);
  filter: drop-shadow(0 2px 10px rgba(236, 72, 153, 0.5)) drop-shadow(0 0 24px rgba(34, 211, 238, 0.4));
}

.hero-subtitle {
  font-size: clamp(1.02rem, 1.9vw, 1.2rem);
  color: var(--text-main);
  font-weight: 600;
  margin: 0;
}

/* 右侧动画（强科技感 + 山水）：5层3D旋转光纤圆环隧道 + 3粒子 + 100x65px山峦SVG */
.hero-tunnel-stage {
  width: 280px;
  height: 250px;
  position: relative;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 750px;
}

.tunnel-rings-3d {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-style: preserve-3d;
  animation: tunnelRotateY 12s linear infinite;
}

@keyframes tunnelRotateY {
  0% {
    transform: rotateX(14deg) rotateY(0deg);
  }
  100% {
    transform: rotateX(14deg) rotateY(360deg);
  }
}

.tunnel-ring {
  position: absolute;
  border-radius: 50%;
  border-style: solid;
  transform-style: preserve-3d;
}

.tunnel-ring.ring-1 {
  width: 228px;
  height: 228px;
  border-width: 2.5px;
  border-color: #EC4899;
  box-shadow: 0 0 22px #EC4899, inset 0 0 18px rgba(236, 72, 153, 0.55);
  transform: translateZ(-70px);
}

.tunnel-ring.ring-2 {
  width: 192px;
  height: 192px;
  border-width: 2px;
  border-color: #22D3EE;
  box-shadow: 0 0 22px #22D3EE, inset 0 0 16px rgba(34, 211, 238, 0.55);
  transform: translateZ(-35px);
}

.tunnel-ring.ring-3 {
  width: 158px;
  height: 158px;
  border-width: 2.5px;
  border-color: #EC4899;
  box-shadow: 0 0 20px #EC4899, inset 0 0 15px rgba(236, 72, 153, 0.5);
  transform: translateZ(0px);
}

.tunnel-ring.ring-4 {
  width: 126px;
  height: 126px;
  border-width: 2px;
  border-color: #22D3EE;
  box-shadow: 0 0 20px #22D3EE, inset 0 0 14px rgba(34, 211, 238, 0.5);
  transform: translateZ(35px);
}

.tunnel-ring.ring-5 {
  width: 96px;
  height: 96px;
  border-width: 2px;
  border-color: #EC4899;
  box-shadow: 0 0 24px #EC4899, inset 0 0 16px rgba(236, 72, 153, 0.65);
  transform: translateZ(70px);
}

/* 隧道中 3 个粉/青发光数据流粒子从远端飞向近端 / 从近端飞向远端（2秒一周期，缩放模拟透视） */
.tunnel-particles {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  transform-style: preserve-3d;
}

.tunnel-particle {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.tunnel-particle.p1 {
  background: #EC4899;
  box-shadow: 0 0 14px #EC4899, 0 0 28px #EC4899;
  animation: particleFarToNear1 2s ease-in-out infinite;
}

.tunnel-particle.p2 {
  background: #22D3EE;
  box-shadow: 0 0 14px #22D3EE, 0 0 28px #22D3EE;
  animation: particleNearToFar 2s ease-in-out infinite 0.65s;
}

.tunnel-particle.p3 {
  background: #EC4899;
  box-shadow: 0 0 14px #22D3EE, 0 0 26px #EC4899;
  animation: particleFarToNear2 2s ease-in-out infinite 1.3s;
}

@keyframes particleFarToNear1 {
  0% {
    transform: translate3d(-42px, -28px, -90px) scale(0.25);
    opacity: 0;
  }
  45% {
    opacity: 1;
  }
  100% {
    transform: translate3d(52px, 34px, 110px) scale(1.75);
    opacity: 0;
  }
}

@keyframes particleNearToFar {
  0% {
    transform: translate3d(48px, -32px, 110px) scale(1.7);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translate3d(-44px, 30px, -90px) scale(0.22);
    opacity: 0;
  }
}

@keyframes particleFarToNear2 {
  0% {
    transform: translate3d(10px, 44px, -95px) scale(0.25);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translate3d(-24px, -48px, 115px) scale(1.8);
    opacity: 0;
  }
}

/* 隧道中心叠一个 100×65px 的山峦剪影 SVG（上下浮动+缩放 2.5秒一周期 + 双层 drop-shadow 辉光） */
.tunnel-mountain-center {
  position: relative;
  z-index: 5;
  width: 100px;
  height: 65px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 10px rgba(236, 72, 153, 0.9)) drop-shadow(0 0 22px rgba(34, 211, 238, 0.85));
  animation: mountainFloatPulse 2.5s ease-in-out infinite;
}

@keyframes mountainFloatPulse {
  0%, 100% {
    transform: translateY(-6px) scale(0.95);
  }
  50% {
    transform: translateY(6px) scale(1.08);
  }
}

.hero-intro {
  max-width: 980px;
  margin: 0 auto 36px;
  padding: 20px 26px;
  background: rgba(24, 14, 48, 0.78);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--brand-pink);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.96rem;
  text-align: left;
  line-height: 1.75;
  box-shadow: 0 0 28px rgba(236, 72, 153, 0.12);
}

.hero-intro strong {
  color: var(--text-main);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 52px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.metric-item strong {
  display: block;
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 1.65rem;
  font-weight: 700;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-item span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   通用区块标题 (Section Header)
   ========================================================================== */
.section {
  padding: 76px 0;
  position: relative;
  z-index: 2;
}

.section-alt {
  background: rgba(20, 10, 40, 0.62);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.8px;
  color: var(--brand-pink);
  text-shadow: 0 0 12px rgba(236, 72, 153, 0.6);
  margin-bottom: 10px;
}

.section-header h2 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: clamp(1.65rem, 3.2vw, 2.35rem);
  font-weight: 700;
  margin-bottom: 14px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ==========================================================================
   产品核心优势介绍（3个图文卡片）
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-cyan);
  background: var(--bg-card-hover);
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.22);
}

.feature-illustration {
  height: 190px;
  background: linear-gradient(180deg, rgba(236, 72, 153, 0.14) 0%, rgba(34, 211, 238, 0.05) 100%);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

.feature-illustration svg {
  width: 100%;
  max-width: 240px;
  height: 140px;
}

.feature-body {
  padding: 28px 26px;
  flex: 1;
}

.feature-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 18px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-tags span {
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(236, 72, 153, 0.14);
  color: var(--brand-cyan);
  border: 1px solid rgba(34, 211, 238, 0.3);
}

/* ==========================================================================
   流媒体与 AI 支持图卡 (Streaming & AI Unlock Cards)
   ========================================================================== */
.unlock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.unlock-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.unlock-panel:hover {
  border-color: var(--brand-pink);
  box-shadow: 0 0 26px rgba(236, 72, 153, 0.2);
}

.unlock-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.unlock-panel-header h3 {
  font-size: 1.35rem;
  font-weight: 700;
}

.unlock-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.14);
  color: var(--brand-cyan);
  border: 1px solid rgba(34, 211, 238, 0.35);
}

.unlock-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.platform-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.platform-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(15, 8, 32, 0.72);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.platform-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.icon-netflix { background: rgba(236, 72, 153, 0.2); color: #f472b6; border: 1px solid rgba(236, 72, 153, 0.45); }
.icon-disney { background: rgba(34, 211, 238, 0.18); color: #22d3ee; border: 1px solid rgba(34, 211, 238, 0.45); }
.icon-youtube { background: rgba(236, 72, 153, 0.2); color: #fb7185; border: 1px solid rgba(236, 72, 153, 0.45); }
.icon-tiktok { background: rgba(34, 211, 238, 0.18); color: #22d3ee; border: 1px solid rgba(34, 211, 238, 0.45); }
.icon-openai { background: rgba(34, 211, 238, 0.18); color: #22d3ee; border: 1px solid rgba(34, 211, 238, 0.45); }
.icon-claude { background: rgba(236, 72, 153, 0.2); color: #f472b6; border: 1px solid rgba(236, 72, 153, 0.45); }
.icon-gemini { background: rgba(34, 211, 238, 0.18); color: #38bdf8; border: 1px solid rgba(34, 211, 238, 0.45); }
.icon-midjourney { background: rgba(236, 72, 153, 0.2); color: #e879f9; border: 1px solid rgba(236, 72, 153, 0.45); }

.platform-info strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-main);
}

.platform-info span {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   套餐价格对比表 (Pricing Section - 真实套餐价格体系)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
  margin-bottom: 42px;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  backdrop-filter: blur(12px);
}

.price-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-cyan);
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.25);
}

.price-card.popular {
  background: linear-gradient(180deg, rgba(236, 72, 153, 0.18) 0%, rgba(24, 14, 48, 0.92) 100%);
  border: 2px solid var(--brand-pink);
  box-shadow: 0 0 34px rgba(236, 72, 153, 0.35);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #FFFFFF;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 0 18px rgba(236, 72, 153, 0.6);
}

.plan-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  min-height: 42px;
}

.plan-price {
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.plan-price .currency {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--brand-pink);
  vertical-align: top;
}

.plan-price .amount {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.45rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text-main);
}

.plan-price .period {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.plan-features {
  flex: 1;
  margin-bottom: 26px;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.plan-features li strong {
  color: var(--text-main);
}

.check-icon {
  color: var(--brand-cyan);
  font-weight: bold;
  flex-shrink: 0;
}

/* 参数横向对比完整表 */
.comparison-table-wrap {
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 720px;
}

.comparison-table th,
.comparison-table td {
  padding: 15px 18px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.comparison-table th {
  background: rgba(15, 8, 32, 0.78);
  color: var(--text-main);
  font-weight: 700;
}

.comparison-table td {
  color: var(--text-secondary);
}

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

/* ==========================================================================
   用户评价 (Testimonials)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
}

.review-stars {
  color: var(--brand-pink);
  text-shadow: 0 0 10px rgba(236, 72, 153, 0.6);
  font-size: 1rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

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

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

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #FFFFFF;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  box-shadow: 0 0 14px rgba(236, 72, 153, 0.5);
}

.author-meta strong {
  display: block;
  font-size: 0.92rem;
  color: var(--text-main);
}

.author-meta span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题解答 (6个 FAQ)
   ========================================================================== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  backdrop-filter: blur(12px);
}

.faq-item[open] {
  border-color: var(--brand-pink);
  box-shadow: 0 0 22px rgba(236, 72, 153, 0.2);
}

.faq-item summary {
  list-style: none;
  padding: 20px 24px;
  font-size: 1.04rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-main);
}

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

.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(236, 72, 153, 0.18);
  color: var(--brand-cyan);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
}

/* ==========================================================================
   底部转化横幅 (Bottom CTA Banner)
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.22) 0%, rgba(34, 211, 238, 0.18) 100%);
  border: 1px solid rgba(236, 72, 153, 0.5);
  border-radius: var(--radius-lg);
  padding: 52px 32px;
  text-align: center;
  margin-top: 48px;
  box-shadow: 0 0 36px rgba(236, 72, 153, 0.22);
}

.cta-banner h2 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   极简页脚 (严格只保留四个标题，点击打开新页面)
   ========================================================================== */
.site-footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border-subtle);
  background: rgba(10, 5, 22, 0.92);
  padding: 36px 0;
}

.footer-links-only {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-links-only a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
}

.footer-links-only a:hover {
  color: var(--brand-cyan);
  background: rgba(236, 72, 153, 0.12);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
}

/* ==========================================================================
   独立子页面与知识科普页面样式
   ========================================================================== */
.subpage-wrap {
  padding: 64px 0 88px;
  position: relative;
  z-index: 2;
}

.subpage-card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.subpage-card h1 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.subpage-meta {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.subpage-card h2 {
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--brand-cyan);
  margin: 28px 0 12px;
}

.subpage-card p,
.subpage-card li {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 12px;
}

.subpage-card ul {
  padding-left: 20px;
  list-style: disc;
  margin-bottom: 18px;
}

.wiki-box {
  background: rgba(15, 8, 32, 0.72);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--brand-pink);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 18px 0;
}

.wiki-box h3 {
  font-size: 1.08rem;
  color: var(--text-main);
  margin-bottom: 8px;
}

/* ==========================================================================
   SEO 专题文章目录与 9 篇深度测评文章样式
   ========================================================================== */
.seo-toc-card {
  max-width: 960px;
  margin: 0 auto 36px;
  background: var(--bg-card);
  border: 1px solid rgba(236, 72, 153, 0.4);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.seo-toc-card h2 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 1.4rem;
  color: var(--text-main);
  margin-bottom: 16px;
}

.seo-toc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
}

.seo-toc-grid a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(15, 8, 32, 0.68);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.45;
}

.seo-toc-grid a:hover {
  border-color: var(--brand-cyan);
  color: var(--text-main);
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.25);
}

.seo-toc-num {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  color: var(--brand-pink);
  flex-shrink: 0;
}

.seo-articles-wrap {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.seo-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 38px 36px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.seo-article-card:hover {
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: 0 0 32px rgba(34, 211, 238, 0.16);
}

.seo-article-card.brand-featured {
  border: 2px solid var(--brand-pink);
  box-shadow: 0 0 36px rgba(236, 72, 153, 0.25);
}

.seo-article-header {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.seo-article-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.seo-badge {
  font-size: 0.76rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.16);
  color: var(--brand-cyan);
  border: 1px solid rgba(34, 211, 238, 0.35);
}

.seo-article-card h2 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: clamp(1.28rem, 2.4vw, 1.58rem);
  font-weight: 700;
  line-height: 1.38;
  color: var(--text-main);
  margin-bottom: 8px;
}

.seo-article-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.seo-article-body h3 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--brand-cyan);
  margin: 22px 0 10px;
}

.seo-article-body p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.78;
  margin-bottom: 14px;
}

.seo-article-body strong {
  color: var(--text-main);
}

.seo-internal-link {
  color: var(--brand-cyan);
  font-weight: 700;
  border-bottom: 1px dashed var(--brand-pink);
  padding-bottom: 1px;
}

.seo-internal-link:hover {
  color: var(--brand-pink);
  border-bottom-color: var(--brand-cyan);
}

.article-faq-box {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed rgba(236, 72, 153, 0.35);
}

.article-faq-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--brand-pink);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-box .faq-list {
  gap: 10px;
}

.article-faq-box .faq-item summary {
  padding: 14px 18px;
  font-size: 0.95rem;
}

.article-faq-box .faq-answer {
  padding: 12px 18px 14px;
  font-size: 0.9rem;
}

.seo-article-footer {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.table-caption {
  padding: 14px 18px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--brand-cyan);
  text-align: left;
  background: rgba(15, 8, 32, 0.85);
  border-bottom: 1px solid var(--border-subtle);
}

.subpage-cta-box {
  margin-top: 36px;
  text-align: center;
}

.sitemap-link {
  color: var(--brand-cyan);
}

.sitemap-link:hover {
  color: var(--brand-pink);
  text-decoration: underline;
}

.sitemap-cta-link {
  color: var(--brand-cyan);
  font-weight: 700;
}

.wiki-header-spacing {
  margin-bottom: 36px;
}

/* ==========================================================================
   响应式媒体查询 (@media) - 手机端完美单栏与大触控区适配 (360/390/768/1440px)
   ========================================================================== */
@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .hero-headline-row {
    flex-direction: column;
    text-align: center;
  }

  .features-grid,
  .reviews-grid,
  .unlock-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .navbar-inner {
    padding: 12px 0;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 6px;
    gap: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 10px;
  }

  .nav-links a {
    white-space: nowrap;
    min-height: 44px;
    min-width: 44px;
    padding: 8px 10px;
    display: inline-flex;
    align-items: center;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero {
    padding: 48px 0 44px;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .hero-tunnel-stage {
    width: 232px;
    height: 216px;
  }

  .hero-intro {
    padding: 16px 18px;
    font-size: 0.92rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 52px;
    font-size: 1.05rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    padding: 20px;
    gap: 16px;
  }

  .section {
    padding: 52px 0;
  }

  .platform-cards {
    grid-template-columns: 1fr;
  }

  .unlock-panel,
  .price-card,
  .review-card,
  .subpage-card,
  .seo-toc-card,
  .seo-article-card {
    padding: 24px 18px;
  }

  .seo-toc-grid {
    grid-template-columns: 1fr;
  }

  .seo-toc-grid a {
    min-height: 44px;
    align-items: center;
  }

  .btn,
  .btn-sm,
  .btn-lg,
  .btn-block {
    min-height: 48px;
    min-width: 44px;
  }

  .footer-links-only {
    flex-direction: column;
    gap: 12px;
  }

  .footer-links-only a {
    width: 100%;
    text-align: center;
    padding: 12px;
    min-height: 48px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

@media (max-width: 420px) {
  .container {
    padding: 0 14px;
  }

  .navbar-inner {
    gap: 10px;
  }

  .brand-logo {
    font-size: 1.1rem;
  }

  .nav-actions .btn-sm {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
}

/* 遵循用户减弱动态效果偏好 (prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fiber-line {
    opacity: 0.25;
    animation: none;
  }
}