/* ==========================================================================
   COCODUCK VPN - Retro 8-bit Bathtub Quest Pixel-Art UI
   - Nostalgic Arcade Palette: 
     Vibrant 8-bit Duck Yellow (#facc15), 
     CRT Arcade Black (#11111b), 
     Pixel-Water Cerulean (#38bdf8), 
     Coin Gold (#f59e0b / #fbbf24)
   - Chunky Pixel-Grid Layout & Stepped Borders
   - Physical 2px Button Depress & Flat Color Shadow Swap
   - Swimming Multi-Frame Pixel Duck Scroll Progress Bar
   - Plan Item Coin-Bounce + Floating "+SPEED" Feedback
   - Strictly NO modern AI helper icons, NO smooth blur, NO soft gradients!
   - 默认白天模式 (Day Mode Default), 昼夜平滑像素切换
   ========================================================================== */

/* ==========================================================================
   高质感系统中英文字体体系 (免外部网络请求，秒开加载，字重端正饱满)
   ========================================================================== */

:root {
  /* 8-bit 经典白天配色 (Day / Bathtub Tile) */
  --pixel-black: #11111b;
  --pixel-dark: #1e1e2e;
  --pixel-white: #ffffff;
  --pixel-bg: #fffbeb;          /* 温暖复古小黄鸭浴缸浅米色 */
  --pixel-bg-alt: #fef08a;      /* 复古黄条纹 */
  --pixel-card-bg: #ffffff;
  --pixel-card-border: #11111b;

  --duck-yellow: #facc15;
  --duck-yellow-dark: #eab308;
  --duck-beak: #f97316;
  --water-blue: #38bdf8;
  --water-blue-dark: #0284c7;
  --water-deep: #0369a1;
  --coin-gold: #f59e0b;
  --coin-gold-light: #fde047;
  --pixel-green: #22c55e;
  --pixel-red: #ef4444;
  --pixel-purple: #a855f7;

  --text-main: #11111b;
  --text-muted: #374151;
  --text-pixel: #1f2937;

  /* 像素阴影与硬边 (严禁模糊滤镜) */
  --pixel-shadow-sm: 3px 3px 0 #11111b;
  --pixel-shadow-md: 5px 5px 0 #11111b;
  --pixel-shadow-lg: 8px 8px 0 #11111b;
  --pixel-shadow-yellow: 5px 5px 0 #ca8a04;
  --pixel-shadow-blue: 5px 5px 0 #0369a1;

  /* 字体规范：全平台高抗锯齿中英混排顶级字体栈 (西文 Segoe UI / SF Pro / Roboto 优先保障数字与英文字符端正优雅，中文字符平滑无缝回退 PingFang / YaHei) */
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --header-height: 72px;
}

/* 8-bit 暗夜街机配色 (Dark / CRT Arcade Night) */
[data-theme="dark"] {
  --pixel-black: #050508;
  --pixel-dark: #0c0e17;
  --pixel-white: #f8fafc;
  --pixel-bg: #11111b;          /* CRT 街机黑 */
  --pixel-bg-alt: #181825;      /* 街机暗色条纹 */
  --pixel-card-bg: #1e1e2e;
  --pixel-card-border: #38bdf8;

  --duck-yellow: #facc15;
  --duck-yellow-dark: #ca8a04;
  --duck-beak: #fb923c;
  --water-blue: #38bdf8;
  --water-blue-dark: #0284c7;
  --water-deep: #075985;
  --coin-gold: #fbbf24;
  --coin-gold-light: #fef08a;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-pixel: #cbd5e1;

  --pixel-shadow-sm: 3px 3px 0 #050508;
  --pixel-shadow-md: 5px 5px 0 #050508;
  --pixel-shadow-lg: 8px 8px 0 #050508;
  --pixel-shadow-yellow: 5px 5px 0 #713f12;
  --pixel-shadow-blue: 5px 5px 0 #0c4a6e;
}

/* 像素排版与基础重置 (仅对图形元素应用像素渲染，文字保持高清平滑抗锯齿) */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.pixel-duck-sprite,
.water-waves,
.arcade-coin-icon,
.pixel-star {
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--pixel-bg);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* 像素街机扫描线纹理 */
  background-image: 
    linear-gradient(rgba(17, 17, 27, 0.03) 50%, transparent 50%),
    linear-gradient(90deg, rgba(17, 17, 27, 0.03) 50%, transparent 50%);
  background-size: 8px 8px;
}

[data-theme="dark"] body {
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.04) 50%, transparent 50%),
    linear-gradient(90deg, rgba(56, 189, 248, 0.04) 50%, transparent 50%);
  background-size: 8px 8px;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

/* 像素排版容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background-color: var(--pixel-bg-alt);
  border-top: 4px solid var(--pixel-black);
  border-bottom: 4px solid var(--pixel-black);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px auto;
}

.pixel-tag {
  display: inline-block;
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  background-color: var(--duck-yellow);
  color: #11111b;
  border: 3px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-sm);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  text-shadow: 2px 2px 0 var(--duck-yellow);
}

[data-theme="dark"] .section-title {
  text-shadow: 2px 2px 0 var(--water-blue-dark);
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   顶栏与滚动动画多帧像素游泳小鸭 (Animated Bathtub Duck Progress)
   ========================================================================== */

/* 顶部水波进度条容器 */
.water-scroll-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 14px;
  background-color: var(--water-deep);
  z-index: 1002;
  overflow: visible;
  border-bottom: 2px solid var(--pixel-black);
}

/* 过程式像素水波纹 */
.water-waves {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: repeating-linear-gradient(
    90deg,
    var(--water-blue) 0px,
    var(--water-blue) 8px,
    var(--water-blue-dark) 8px,
    var(--water-blue-dark) 16px
  );
  animation: waveScroll 1.2s steps(4) infinite;
}

@keyframes waveScroll {
  from { background-position: 0 0; }
  to { background-position: 32px 0; }
}

/* 随滚动从左游向右的像素小黄鸭 */
.swimming-duck-wrapper {
  position: absolute;
  top: -18px;
  left: 0%;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 1003;
  transition: left 0.1s linear;
}

/* 多帧小鸭水上浮沉摆动动画 */
.pixel-duck-sprite {
  width: 36px;
  height: 32px;
  animation: duckBob 0.6s steps(2) infinite alternate;
}

@keyframes duckBob {
  0% { transform: translateY(0px) rotate(0deg); }
  100% { transform: translateY(4px) rotate(2deg); }
}

/* ==========================================================================
   顶部导航栏 (Navbar - 纯净排版无折行)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 14px;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--pixel-card-bg);
  border-bottom: 4px solid var(--pixel-black);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.15);
  z-index: 1000;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 20px;
  gap: 16px;
}

/* 品牌标识 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--duck-yellow);
  padding: 4px 10px;
  border: 3px solid var(--pixel-black);
  box-shadow: 3px 3px 0 var(--pixel-black);
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
  transition: transform 0.05s steps(2), box-shadow 0.05s steps(2);
}

.brand-logo:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--pixel-black);
}

.brand-logo:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--pixel-black);
}

.brand-logo-img {
  height: 32px;
  width: auto;
  display: block;
}

.brand-vpn-badge {
  font-family: var(--font-main);
  font-size: 0.7rem;
  font-weight: 900;
  background: var(--duck-beak);
  color: #ffffff;
  padding: 2px 6px;
  border: 2px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  letter-spacing: 0.05em;
  line-height: 1;
}

.hero-duck-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* 导航链接目录 */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 10px;
  flex-wrap: nowrap;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  padding: 6px 9px;
  border: 2px solid transparent;
  white-space: nowrap;
  transition: all 0.1s steps(2);
  display: inline-block;
}

.nav-link:hover {
  background-color: var(--duck-yellow);
  color: #11111b;
  border-color: var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
}

/* 新增‘推荐资讯’高亮入口 */
.nav-link-news {
  background-color: var(--water-blue);
  color: #11111b !important;
  border: 2px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  white-space: nowrap;
}

.nav-link-news:hover {
  background-color: var(--coin-gold);
  transform: translate(-1px, -1px);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* 顶部 CTA 按钮 */
.nav-cta-btn {
  white-space: nowrap;
  padding: 9px 18px;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  min-height: 40px;
}

/* ==========================================================================
   精致质感昼夜模式切换按钮 (Refined Day/Night Switch Button)
   ========================================================================== */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--pixel-card-bg);
  border: 2.5px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.15s ease, background-color 0.2s ease;
}

.theme-toggle-btn:hover {
  background: var(--duck-yellow);
  transform: translateY(-2px);
  box-shadow: 3px 3px 0 var(--pixel-black);
}

.theme-toggle-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 0 0 0 var(--pixel-black);
}

.theme-svg-icon {
  width: 22px;
  height: 22px;
  position: absolute;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

.theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.3);
  pointer-events: none;
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.3);
  pointer-events: none;
}

[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ==========================================================================
   物理下压 2px 像素按钮与阴影对调 (Chunky Pixel Buttons)
   ========================================================================== */
.pixel-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-main);
  font-size: 0.96rem;
  font-weight: 850;
  letter-spacing: 0.04em;
  padding: 13px 26px;
  background-color: var(--duck-yellow);
  color: #11111b !important;
  border: 3px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-md);
  text-decoration: none;
  cursor: pointer;
  position: relative;
  user-select: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: transform 0.05s steps(2), box-shadow 0.05s steps(2);
}

.pixel-btn:hover {
  background-color: var(--coin-gold);
}

/* 按钮物理下压 2 像素与锐利纯色阴影交换 */
.pixel-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--pixel-black);
}

.pixel-btn-blue {
  background-color: var(--water-blue);
  color: #11111b !important;
}

.pixel-btn-blue:hover {
  background-color: #0284c7;
  color: #ffffff !important;
}

.pixel-btn-white {
  background-color: #ffffff;
  color: #11111b !important;
}

.pixel-btn-white:hover {
  background-color: var(--duck-yellow);
}

.pixel-btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
  font-weight: 850;
}

.pixel-btn-block {
  width: 100%;
}

/* 移动端汉堡按钮 */
.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: var(--duck-yellow);
  border: 3px solid var(--pixel-black);
  box-shadow: 3px 3px 0 var(--pixel-black);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ==========================================================================
   Hero 主视觉区 (Hero Section)
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--header-height) + 50px);
  padding-bottom: 70px;
  text-align: center;
  position: relative;
}

.hero-banner-frame {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-lg);
  padding: 48px 32px;
  max-width: 960px;
  margin: 0 auto 40px auto;
  position: relative;
}

/* 像素四角点缀 (16-bit corner accents) */
.hero-banner-frame::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  border: 2px dashed rgba(17, 17, 27, 0.2);
  pointer-events: none;
}

.hero-duck-avatar-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px auto;
  background: var(--duck-yellow);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: duckBob 0.8s steps(2) infinite alternate;
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title .brand-name-box {
  display: inline-block;
  background: var(--duck-yellow);
  color: #11111b;
  padding: 2px 14px;
  border: 3px solid var(--pixel-black);
  box-shadow: 4px 4px 0 var(--pixel-black);
  transform: rotate(-1deg);
  margin: 0 4px;
}

.hero-subtitle-box {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--water-blue-dark);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

[data-theme="dark"] .hero-subtitle-box {
  color: var(--water-blue);
}

.hero-intro {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 32px auto;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.arcade-badges-strip {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 3px solid var(--pixel-black);
}

.arcade-badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-main);
  font-size: 0.88rem;
  font-weight: 750;
  color: var(--text-main);
}

.badge-pixel-dot {
  width: 10px;
  height: 10px;
  background: var(--pixel-green);
  border: 2px solid var(--pixel-black);
}

/* ==========================================================================
   产品核心优势 (3个像素图文卡片)
   ========================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.adv-pixel-card {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.1s steps(2), box-shadow 0.1s steps(2);
}

.adv-pixel-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--pixel-shadow-lg);
  border-color: var(--duck-yellow-dark);
}

.adv-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.adv-sprite-box {
  width: 52px;
  height: 52px;
  background: var(--duck-yellow);
  border: 3px solid var(--pixel-black);
  box-shadow: 3px 3px 0 var(--pixel-black);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.adv-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.25;
}

.adv-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
  flex-grow: 1;
}

.adv-pixel-list {
  list-style: none;
  border-top: 2px dashed var(--pixel-black);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.adv-list-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.98rem;
  color: var(--text-main);
}

.adv-item-arrow {
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 900;
  color: var(--duck-beak);
  flex-shrink: 0;
}

/* ==========================================================================
   流媒体与 AI 支持图卡 (16-bit Arcade Cards)
   ========================================================================== */
.showcase-grid-two {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-pixel-card {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-md);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
}

.showcase-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 3px solid var(--pixel-black);
}

.showcase-sprite-icon {
  width: 56px;
  height: 56px;
  border: 3px solid var(--pixel-black);
  box-shadow: 3px 3px 0 var(--pixel-black);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.showcase-title {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--text-main);
}

.showcase-subtitle {
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 750;
  color: var(--water-blue-dark);
  margin-top: 4px;
}

[data-theme="dark"] .showcase-subtitle {
  color: var(--water-blue);
}

.showcase-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}

.arcade-tile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: auto;
}

.arcade-tile {
  background: var(--pixel-bg);
  border: 2px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  padding: 10px 8px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: transform 0.05s steps(2);
}

.arcade-tile:hover {
  background: var(--duck-yellow);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--pixel-black);
}

.arcade-tile-tag {
  font-family: var(--font-main);
  font-size: 0.68rem;
  font-weight: 850;
  background: var(--pixel-black);
  color: var(--duck-yellow);
  padding: 2px 5px;
  letter-spacing: 0.04em;
}

.arcade-tile-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

/* ==========================================================================
   套餐价格对比表 (真实的网上套餐价格 + 金币弹跳与浮动 "+SPEED")
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-pixel-card {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-md);
  padding: 38px 24px 30px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.1s steps(2), box-shadow 0.1s steps(2);
}

/* 爆款高亮卡片 */
.pricing-pixel-featured {
  background: #fffdf5;
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-lg);
  transform: translateY(-8px);
}

[data-theme="dark"] .pricing-pixel-featured {
  background: #252538;
}

.pricing-pixel-badge {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--duck-yellow);
  color: #11111b;
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.04em;
  padding: 5px 14px;
  border: 3px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  white-space: nowrap;
}

/* 金币图标与浮动 '+SPEED' 动画区 */
.card-coin-feedback-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  position: relative;
}

.arcade-coin-icon {
  width: 28px;
  height: 28px;
  transition: transform 0.2s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

/* 浮动 8-bit '+SPEED' 文字反响 */
.floating-speed-feedback {
  font-family: var(--font-main);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--coin-gold);
  background: var(--pixel-black);
  padding: 3px 8px;
  border: 2px solid var(--duck-yellow);
  opacity: 0;
  transform: translateY(0);
  pointer-events: none;
  transition: opacity 0.2s steps(3), transform 0.3s steps(4);
}

/* 悬停卡片触发金币弹跳与浮动 '+SPEED' */
.pricing-pixel-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--pixel-shadow-lg);
}

.pricing-pixel-card:hover .arcade-coin-icon {
  animation: coinBounce 0.5s steps(4) infinite alternate;
}

.pricing-pixel-card:hover .floating-speed-feedback {
  opacity: 1;
  transform: translateY(-8px);
}

@keyframes coinBounce {
  0% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-8px) scale(1.15) rotate(15deg); }
  100% { transform: translateY(0) scale(1); }
}

.pricing-plan-title {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 6px;
}

.pricing-plan-summary {
  font-size: 0.98rem;
  color: var(--text-muted);
  min-height: 44px;
  margin-bottom: 20px;
}

.pricing-cost-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 16px 0;
  border-top: 3px dashed var(--pixel-black);
  border-bottom: 3px dashed var(--pixel-black);
  margin-bottom: 24px;
}

.currency-mark {
  font-family: var(--font-main);
  font-size: 1.35rem;
  font-weight: 850;
  color: var(--duck-beak);
}

.price-main-val {
  font-family: var(--font-main);
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
  letter-spacing: -0.02em;
}

.price-cycle-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
}

.pricing-specs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.spec-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  color: var(--text-main);
}

.spec-dot {
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 900;
  color: var(--pixel-green);
  flex-shrink: 0;
}

/* ==========================================================================
   用户口碑与评价 (Arcade Review Cards)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-pixel-card {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.review-stars-strip {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
}

.pixel-star {
  width: 18px;
  height: 18px;
}

.review-body-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-author-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 2px dashed var(--pixel-black);
  padding-top: 16px;
}

.author-pixel-sprite {
  width: 44px;
  height: 44px;
  background: var(--duck-yellow);
  border: 3px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-main);
  font-size: 1.05rem;
  font-weight: 900;
  flex-shrink: 0;
}

.author-name {
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--text-main);
}

.author-role {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题解答 (FAQ Accordion)
   ========================================================================== */
.faq-container-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-pixel-box {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-sm);
}

.faq-trigger-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  text-align: left;
  cursor: pointer;
  background: none;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
}

.faq-icon-cross {
  font-family: var(--font-main);
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--duck-beak);
  transition: transform 0.1s steps(2);
}

.faq-pixel-box.active .faq-icon-cross {
  transform: rotate(45deg);
}

.faq-answer-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s steps(4), padding 0.25s steps(4);
  padding: 0 24px;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-pixel-box.active .faq-answer-drawer {
  max-height: 350px;
  padding-bottom: 22px;
  border-top: 2px dashed var(--pixel-black);
  padding-top: 14px;
}

/* ==========================================================================
   落地页底部号召条 (Bottom Banner)
   ========================================================================== */
.bottom-quest-banner {
  background: var(--duck-yellow);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-lg);
  padding: 50px 32px;
  text-align: center;
  color: #11111b;
}

.banner-quest-title {
  font-size: 2.35rem;
  font-weight: 900;
  margin-bottom: 14px;
}

.banner-quest-desc {
  font-size: 1.2rem;
  max-width: 650px;
  margin: 0 auto 30px auto;
  color: #1e1e2e;
}

/* ==========================================================================
   严格规范页脚 (Strict Footer: 仅保留 4 个标题)
   ========================================================================== */
.footer {
  background: var(--pixel-card-bg);
  border-top: 4px solid var(--pixel-black);
  padding: 44px 0 32px 0;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  list-style: none;
  margin-bottom: 26px;
}

.footer-pixel-link {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  padding: 6px 14px;
  border: 2px solid transparent;
  transition: all 0.1s steps(2);
}

.footer-pixel-link:hover {
  background: var(--duck-yellow);
  color: #11111b;
  border: 2px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
}

.footer-credits {
  text-align: center;
  padding-top: 20px;
  border-top: 2px dashed var(--pixel-black);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.footer-domain-tag {
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 800;
  background: var(--water-blue);
  color: #11111b;
  padding: 2px 8px;
  border: 1px solid var(--pixel-black);
  letter-spacing: 0.03em;
}

/* ==========================================================================
   子页面统一排版 (About, Terms, Privacy, Sitemap, News)
   ========================================================================== */
.subpage-banner {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 40px;
  background: var(--pixel-bg-alt);
  border-bottom: 4px solid var(--pixel-black);
  text-align: center;
}

.subpage-wrap {
  max-width: 920px;
  margin: 50px auto 80px auto;
  padding: 0 20px;
}

.pixel-article-box {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-md);
  padding: 44px 36px;
  margin-bottom: 30px;
}

.pixel-article-box h2 {
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--text-main);
  margin-top: 36px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--pixel-black);
}

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

.pixel-article-box p {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 18px;
}

.pixel-article-box ul, .pixel-article-box ol {
  margin-left: 28px;
  margin-bottom: 22px;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.pixel-article-box li {
  margin-bottom: 8px;
}

.pixel-callout {
  background: var(--duck-yellow);
  color: #11111b;
  border: 3px solid var(--pixel-black);
  box-shadow: 4px 4px 0 var(--pixel-black);
  padding: 16px 20px;
  font-size: 1.05rem;
  margin: 24px 0;
}

.pixel-node-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 24px 0;
}

.pixel-node-item {
  background: var(--pixel-bg);
  border: 2px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  padding: 18px;
}

.pixel-node-item h4 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-main);
}

.pixel-node-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ==========================================================================
   SEO 深度长文与资讯专区模块 (Article & Hub Styling)
   ========================================================================== */
.breadcrumb-trail {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb-trail a {
  color: var(--text-main);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.breadcrumb-sep {
  opacity: 0.5;
}

.article-header {
  margin-bottom: 28px;
  border-bottom: 3px solid var(--pixel-black);
  padding-bottom: 22px;
}
.article-main-title {
  font-size: 2.1rem;
  font-weight: 900;
  line-height: 1.35;
  color: var(--text-main);
  margin: 12px 0 16px 0;
}
.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.92rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 目录 (Table of Contents - TOC) */
.article-toc-box {
  background: var(--pixel-bg);
  border: 3px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-sm);
  padding: 22px 26px;
  margin: 28px 0 36px 0;
}
.toc-title {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 0;
}
.toc-list li {
  font-size: 1rem;
  line-height: 1.5;
}
.toc-list a {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px dotted var(--pixel-black);
  transition: all 0.1s ease;
}
.toc-list a:hover {
  background: var(--duck-yellow);
  color: #11111b;
  padding: 1px 4px;
}

/* 像素风格对比表格 */
.pixel-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border: 3px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-sm);
}
.pixel-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background: var(--pixel-card-bg);
  min-width: 580px;
}
.pixel-table th {
  background: var(--duck-yellow);
  color: #11111b;
  font-weight: 850;
  padding: 14px 16px;
  border-bottom: 3px solid var(--pixel-black);
  border-right: 2px solid var(--pixel-black);
}
.pixel-table td {
  padding: 12px 16px;
  border-bottom: 1px dashed var(--pixel-black);
  border-right: 1px solid rgba(0,0,0,0.1);
  font-size: 0.98rem;
  color: var(--text-main);
}
.pixel-table tr:last-child td {
  border-bottom: none;
}
.pixel-table tr:hover td {
  background: rgba(250, 204, 21, 0.08);
}

/* 文章内部内链高亮 */
.seo-internal-link {
  color: #0284c7;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  transition: all 0.15s ease;
}
.seo-internal-link:hover {
  background: var(--duck-yellow);
  color: #11111b;
  padding: 0 4px;
}

/* 文章内部 FAQ 模块 */
.article-faq-container {
  margin: 40px 0 32px 0;
  border-top: 3px solid var(--pixel-black);
  padding-top: 32px;
}
.article-faq-container h3 {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
}
.article-faq-item {
  background: var(--pixel-bg);
  border: 3px solid var(--pixel-black);
  box-shadow: 2px 2px 0 var(--pixel-black);
  margin-bottom: 16px;
  padding: 18px 22px;
}
.article-faq-q {
  font-size: 1.15rem;
  font-weight: 850;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.article-faq-a {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 相关阅读模块 (Related Articles) */
.related-articles-section {
  margin: 48px 0 24px 0;
  border-top: 3px dashed var(--pixel-black);
  padding-top: 32px;
}
.related-title {
  font-size: 1.45rem;
  font-weight: 900;
  margin-bottom: 20px;
  color: var(--text-main);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.related-card {
  background: var(--pixel-bg);
  border: 3px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-sm);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.1s steps(2), box-shadow 0.1s steps(2);
}
.related-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--pixel-shadow-md);
}
.related-card-tag {
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--water-blue);
  color: #11111b;
  padding: 2px 8px;
  border: 1px solid var(--pixel-black);
  align-self: flex-start;
  margin-bottom: 10px;
}
.related-card-title {
  font-size: 1.08rem;
  font-weight: 850;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 8px;
  flex-grow: 1;
}
.related-card-link {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--duck-beak);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 资讯中心首页卡片列表 (Hub Grid) */
.insights-hub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 32px;
}
.hub-article-card {
  background: var(--pixel-card-bg);
  border: 4px solid var(--pixel-black);
  box-shadow: var(--pixel-shadow-md);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.1s steps(2), box-shadow 0.1s steps(2);
}
.hub-article-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--pixel-shadow-lg);
}
.hub-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 8px;
}
.hub-card-date {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.hub-card-title {
  font-size: 1.35rem;
  font-weight: 900;
  line-height: 1.38;
  color: var(--text-main);
  margin-bottom: 12px;
}
.hub-card-title a {
  color: inherit;
  text-decoration: none;
}
.hub-card-title a:hover {
  color: var(--duck-beak);
}
.hub-card-desc {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}
.hub-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 2px dashed var(--pixel-black);
  padding-top: 14px;
}

/* ==========================================================================
   响应式媒体查询 (@media - 手机端单栏与手指点击)
   ========================================================================== */
@media (max-width: 1280px) {
  .nav-menu {
    gap: 6px;
  }
  .nav-link {
    font-size: 0.88rem;
    padding: 5px 6px;
  }
  .nav-cta-btn {
    padding: 8px 12px;
    font-size: 0.75rem;
  }
  .nav-actions {
    gap: 8px;
  }
}

@media (max-width: 1140px) {
  .mobile-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: calc(var(--header-height) + 14px);
    left: 0;
    right: 0;
    background: var(--pixel-card-bg);
    border-bottom: 4px solid var(--pixel-black);
    flex-direction: column;
    padding: 24px;
    gap: 14px;
    transform: translateY(-140%);
    transition: transform 0.15s steps(3);
    box-shadow: var(--pixel-shadow-lg);
    z-index: 999;
  }
  .nav-menu.open {
    transform: translateY(0);
  }
  .nav-link {
    width: 100%;
    text-align: center;
    font-size: 1.15rem;
    padding: 8px 0;
  }
  .nav-cta-btn {
    display: none;
  }
  .brand-logo-img {
    height: 32px;
  }
  .brand-logo {
    padding: 3px 8px;
    gap: 6px;
  }
}

@media (max-width: 1024px) {
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .pricing-pixel-featured {
    transform: none;
  }
  .showcase-grid-two {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 72px;
  }
  .section {
    padding: 50px 0;
  }
  .section-title {
    font-size: 1.85rem;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-subtitle-box {
    font-size: 1.15rem;
  }
  .hero-banner-frame {
    padding: 30px 18px;
  }
  .arcade-tile-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pixel-node-grid {
    grid-template-columns: 1fr;
  }
  .insights-hub-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }
  .pixel-article-box {
    padding: 26px 18px;
  }
  .pixel-btn {
    width: 100%;
    min-height: 48px; /* 适合移动端手指点击 */
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .arcade-badges-strip {
    flex-direction: column;
    gap: 12px;
  }
  .footer-nav-list {
    flex-direction: column;
    gap: 14px;
  }
}