/* ====================================================================
   疾风云（JFCloud） (jfcloudyun.wiki) — 现代化像素风视觉系统 (style.css)
   世界观：雨夜便利店 (Rainy Night Convenience Store)
   画风：新像素风 (Pixel Modernism - 纯几何硬阴影、点阵边框、阶梯层次)
   版式原型：导览地图 (Wayfinding Map)
   配色系统：主色相 226° 类比色方案 (深蓝 / 电离青 / 熏衣紫 / 暖黄窗光)
   字体系：系统原生字体栈（0 外部请求，极速 LCP 核心性能）
   ==================================================================== */

:root {
  /* 226° 主色及类比色系 */
  --color-primary: #3b5bf5;
  --color-primary-hover: #2b47db;
  --color-primary-light: rgba(59, 91, 245, 0.15);
  --color-cyan: #0ea5e9;
  --color-sky: #38bdf8;
  --color-indigo: #6366f1;
  --color-violet: #4f46e5;
  
  /* 雨夜便利店暖光窗点缀 */
  --color-warm: #fbbf24;
  --color-warm-light: #fef08a;
  --color-success: #10b981;

  /* 背景层级体系 */
  --bg-page: #0b0f19;
  --bg-surface: #111827;
  --bg-surface-elevated: #1a2234;
  --bg-glass: rgba(17, 24, 39, 0.88);
  --bg-surface-alt: #162032;

  /* 字体与排版 */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-warm: #fef08a;

  /* 像素风边框与几何硬阴影 */
  --border-subtle: #1e293b;
  --border-neon: rgba(59, 91, 245, 0.45);
  --border-cyan: rgba(14, 165, 233, 0.4);
  --border-warm: rgba(251, 191, 36, 0.45);
  
  --pixel-shadow-sm: 2px 2px 0px #030712;
  --pixel-shadow-md: 4px 4px 0px #030712;
  --pixel-shadow-primary: 4px 4px 0px rgba(59, 91, 245, 0.5);
  --pixel-shadow-warm: 4px 4px 0px rgba(251, 191, 36, 0.35);

  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container-max: 1140px;
  --container-narrow: 840px;
}

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

html {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--text-main);
  overflow-x: hidden;
  position: relative;
}

/* 光标聚光灯背景层（动态探照微光） */
.spotlight-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(circle 380px at var(--mouse-x, 50vw) var(--mouse-y, 40vh), rgba(59, 91, 245, 0.12), transparent 75%);
  transition: opacity 0.3s ease;
}

/* 雨夜点阵网格与微雨滴纹理 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(1px 1px at 15px 15px, rgba(56, 189, 248, 0.35), transparent),
    radial-gradient(1px 1px at 75px 85px, rgba(251, 191, 36, 0.25), transparent),
    linear-gradient(rgba(17, 24, 39, 0.7) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 24, 39, 0.7) 1px, transparent 1px);
  background-size: 90px 90px, 120px 120px, 30px 30px, 30px 30px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

a {
  color: var(--color-sky);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: #7dd3fc;
}

ul, ol {
  list-style: none;
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 2;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 2;
}

/* 像素风格按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 11px 24px;
  border-radius: 4px;
  border: 2px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  box-shadow: var(--pixel-shadow-sm);
  min-height: 44px;
}

.btn-primary {
  background-color: var(--color-primary);
  border-color: #60a5fa;
  color: #ffffff;
  box-shadow: 3px 3px 0px #1e1b4b;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: #ffffff;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px #1e1b4b;
}

.btn-primary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0px #1e1b4b;
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  border-color: #334155;
  color: var(--text-main);
  box-shadow: 3px 3px 0px #030712;
}

.btn-secondary:hover {
  background-color: #27354f;
  border-color: #475569;
  color: #ffffff;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px #030712;
}

.btn-secondary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0px #030712;
}

.btn-large {
  padding: 14px 30px;
  font-size: 1.05rem;
  border-width: 2px;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* 呼吸光晕动效 */
@keyframes breathing-glow {
  0%, 100% {
    box-shadow: 0 0 15px rgba(59, 91, 245, 0.35), 4px 4px 0px #1e1b4b;
  }
  50% {
    box-shadow: 0 0 28px rgba(59, 91, 245, 0.75), 4px 4px 0px #1e1b4b;
  }
}

.glow-active {
  animation: breathing-glow 3.5s ease-in-out infinite;
}

/* 顶部导航 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border-subtle);
  transition: all 0.2s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--color-primary);
  box-shadow: 0 6px 16px rgba(3, 7, 18, 0.7);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.02em;
}

.site-logo:hover {
  color: var(--color-sky);
}

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

.logo-tagline {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-warm);
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid var(--border-warm);
  padding: 2px 7px;
  border-radius: 3px;
  display: none;
}

@media (min-width: 640px) {
  .logo-tagline {
    display: inline-block;
  }
}

.site-nav {
  display: none;
}

@media (min-width: 900px) {
  .site-nav {
    display: block;
  }
}

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

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 6px 2px;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-sky);
  transition: width 0.2s ease;
}

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

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

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--border-subtle);
  border-radius: 4px;
  color: var(--text-main);
  cursor: pointer;
  box-shadow: var(--pixel-shadow-sm);
}

@media (min-width: 900px) {
  .menu-toggle {
    display: none;
  }
}

/* 移动端菜单抽屉 */
.mobile-nav {
  display: none;
  background-color: var(--bg-surface);
  border-bottom: 2px solid var(--border-subtle);
  padding: 16px 20px;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 12px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  display: block;
}

/* Hero 主视觉（雨夜便利店大灯箱） */
.hero-section {
  padding: 65px 0 55px;
  position: relative;
  border-bottom: 2px solid var(--border-subtle);
  background: linear-gradient(180deg, rgba(59, 91, 245, 0.08) 0%, transparent 100%);
}

@media (min-width: 768px) {
  .hero-section {
    padding: 85px 0 75px;
  }
}

.hero-box {
  text-align: center;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.hero-station-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(59, 91, 245, 0.15);
  border: 1px solid var(--border-neon);
  color: var(--color-sky);
  font-size: 0.84rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 4px;
  margin-bottom: 24px;
  box-shadow: 2px 2px 0px rgba(11, 15, 25, 0.6);
}

.pixel-pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-warm);
  display: inline-block;
  box-shadow: 0 0 8px var(--color-warm);
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 34px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.15rem;
  }
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: center;
  align-items: center;
  margin-bottom: 42px;
}

@media (min-width: 480px) {
  .hero-actions {
    flex-direction: row;
    gap: 16px;
  }
}

.hero-trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 18px 28px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 7px;
}

.trust-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-warm);
}

/* 导览地图区块标头 */
.section {
  padding: 65px 0;
  border-bottom: 2px solid var(--border-subtle);
  position: relative;
}

@media (min-width: 768px) {
  .section {
    padding: 85px 0;
  }
}

.section-alt {
  background-color: rgba(17, 24, 39, 0.45);
}

.section-header {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 46px;
}

.section-map-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-sky);
  letter-spacing: 0.08em;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-cyan);
  padding: 3px 10px;
  border-radius: 3px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.3;
  color: #ffffff;
  margin-bottom: 12px;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.3rem;
  }
}

.section-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 1. FAQ 双列手风琴 (5条) */
.faq-dual-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 980px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .faq-dual-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.faq-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  box-shadow: var(--pixel-shadow-sm);
  transition: all 0.2s ease;
  height: fit-content;
}

.faq-card.active {
  border-color: var(--color-primary);
  box-shadow: var(--pixel-shadow-primary);
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
  color: #ffffff;
  cursor: pointer;
  gap: 14px;
}

.faq-trigger:hover {
  color: var(--color-sky);
}

.faq-icon-box {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  transition: transform 0.2s ease;
}

.faq-card.active .faq-icon-box {
  transform: rotate(180deg);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.faq-content {
  display: none;
  padding: 0 18px 18px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px dashed var(--border-subtle);
  margin-top: 4px;
  padding-top: 12px;
}

.faq-card.active .faq-content {
  display: block;
}

/* 2. 人群对照 (3组) */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .audience-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.audience-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 28px 22px;
  box-shadow: var(--pixel-shadow-md);
  display: flex;
  flex-direction: column;
}

.audience-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-warm);
  background-color: rgba(251, 191, 36, 0.12);
  border: 1px solid var(--border-warm);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 12px;
  width: fit-content;
}

.audience-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.audience-pain {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border-subtle);
}

.audience-solution {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 3. 使用场景 (4张 · 横向滑动条形态) */
.scenarios-track-wrapper {
  overflow-x: auto;
  padding-bottom: 16px;
  margin-left: -20px;
  margin-right: -20px;
  padding-left: 20px;
  padding-right: 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) var(--bg-surface);
}

.scenarios-track-wrapper::-webkit-scrollbar {
  height: 6px;
}

.scenarios-track-wrapper::-webkit-scrollbar-thumb {
  background-color: var(--color-primary);
  border-radius: 3px;
}

.scenarios-slider {
  display: flex;
  gap: 20px;
  width: max-content;
}

.scenario-slide-card {
  width: 280px;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 24px;
  box-shadow: var(--pixel-shadow-md);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

@media (min-width: 640px) {
  .scenario-slide-card {
    width: 320px;
  }
}

.scenario-device-badge {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-sky);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  padding: 2px 8px;
  border-radius: 3px;
  display: inline-block;
  margin-bottom: 12px;
  width: fit-content;
}

.scenario-slide-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.scenario-slide-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 4. 特性 (6项 · 卡片网格形态) */
.features-pixel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .features-pixel-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-pixel-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pixel-feature-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 26px 22px;
  box-shadow: var(--pixel-shadow-md);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.pixel-feature-card:hover {
  border-color: var(--color-primary);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px #030712;
}

.feature-pixel-icon {
  width: 44px;
  height: 44px;
  background-color: var(--bg-surface-elevated);
  border: 2px solid var(--color-primary);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-sky);
  margin-bottom: 16px;
  box-shadow: 2px 2px 0px #030712;
}

.feature-pixel-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.feature-card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 5. 流媒体支持与 AI 支持 */
.support-dual-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .support-dual-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

.support-block {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 28px 24px;
  box-shadow: var(--pixel-shadow-md);
}

.support-block-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.support-block-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.pixel-badges-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pixel-badge-item {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: 3px;
}

/* 6. 定价 (3档 · 并列卡片 · 推荐中档) */
.pricing-parallel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
}

@media (min-width: 860px) {
  .pricing-parallel-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-pixel-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 34px 24px;
  box-shadow: var(--pixel-shadow-md);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-pixel-card.recommended {
  border-color: var(--color-primary);
  background: linear-gradient(180deg, rgba(59, 91, 245, 0.08) 0%, var(--bg-surface) 100%);
  box-shadow: var(--pixel-shadow-primary);
}

@media (min-width: 860px) {
  .pricing-pixel-card.recommended {
    transform: translateY(-8px);
  }
}

.pricing-badge-top {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-warm);
  color: #0b0f19;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 14px;
  border-radius: 3px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  box-shadow: 2px 2px 0px #030712;
}

.plan-label {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--color-sky);
  margin-bottom: 6px;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.plan-price-row {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 14px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
}

.price-num {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
}

.price-unit {
  font-size: 0.92rem;
  color: var(--text-dim);
}

.plan-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--border-subtle);
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-feature-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.plan-feature-row svg {
  width: 18px;
  height: 18px;
  color: var(--color-warm);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Final CTA 区块 */
.final-cta-section {
  padding: 75px 0;
  background: linear-gradient(180deg, var(--bg-surface) 0%, #030712 100%);
  border-bottom: 2px solid var(--border-subtle);
  text-align: center;
}

.final-cta-box {
  max-width: 680px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  color: #ffffff;
}

@media (min-width: 768px) {
  .final-cta-title {
    font-size: 2.5rem;
  }
}

.final-cta-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 34px;
}

/* 页脚 Footer */
.site-footer {
  background-color: #070a12;
  padding: 55px 0 35px;
  margin-top: auto;
  border-top: 2px solid var(--border-subtle);
}

.footer-main-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .footer-main-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-brand-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 360px;
}

.footer-nav-heading {
  font-size: 0.96rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-item {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-nav-item:hover {
  color: var(--color-sky);
}

.footer-bottom-bar {
  padding-top: 24px;
  border-top: 1px dashed var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

@media (min-width: 768px) {
  .footer-bottom-bar {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-disclosure-text {
  color: var(--color-warm);
  font-weight: 600;
}

/* 移动端吸底 CTA */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background-color: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 2px solid var(--color-primary);
  padding: 10px 16px;
  box-shadow: 0 -4px 14px rgba(0, 0, 0, 0.7);
  display: none;
}

@media (max-width: 767px) {
  .mobile-sticky-bar.visible {
    display: block;
  }
}

/* 文章正文与内容页通用 */
.page-header {
  padding: 55px 0 40px;
  border-bottom: 2px solid var(--border-subtle);
  text-align: center;
  background: linear-gradient(180deg, rgba(59, 91, 245, 0.06) 0%, transparent 100%);
}

.page-title {
  font-size: 2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.3;
}

@media (min-width: 768px) {
  .page-title {
    font-size: 2.5rem;
  }
}

.page-meta-row {
  font-size: 0.9rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.article-content-body {
  padding: 48px 0 65px;
}

.article-body-area {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #e2e8f0;
}

.article-body-area h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-subtle);
}

.article-body-area h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-sky);
  margin: 26px 0 12px;
}

.article-body-area p {
  margin-bottom: 22px;
}

.article-body-area ul,
.article-body-area ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-body-area ul {
  list-style: square;
}

.article-body-area ol {
  list-style: decimal;
}

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

.article-callout-pixel {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-neon);
  border-radius: 6px;
  padding: 22px;
  margin: 32px 0;
  box-shadow: var(--pixel-shadow-sm);
}

.callout-pixel-title {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--color-warm);
  margin-bottom: 8px;
}

.article-faq-container {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 26px 22px;
  margin: 38px 0;
  box-shadow: var(--pixel-shadow-sm);
}

.article-faq-heading {
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
}

.article-faq-card {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border-subtle);
}

.article-faq-card:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.faq-q-text {
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.faq-a-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.article-cta-box-pixel {
  background: linear-gradient(135deg, rgba(59, 91, 245, 0.2) 0%, rgba(14, 165, 233, 0.15) 100%);
  border: 2px solid var(--color-primary);
  border-radius: 6px;
  padding: 34px 24px;
  text-align: center;
  margin: 48px 0 34px;
  box-shadow: var(--pixel-shadow-primary);
}

.article-cta-box-pixel h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.article-cta-box-pixel p {
  font-size: 0.96rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 20px;
}

.article-nav-map {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 2px solid var(--border-subtle);
}

@media (min-width: 640px) {
  .article-nav-map {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* 博客列表页 blog.html (6篇展示卡片) */
.blog-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 640px) {
  .blog-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 980px) {
  .blog-cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-item-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 24px;
  box-shadow: var(--pixel-shadow-md);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.blog-item-card:hover {
  border-color: var(--color-primary);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px #030712;
}

.blog-card-type-tag {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-sky);
  margin-bottom: 10px;
}

.blog-card-headline {
  font-size: 1.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-card-headline a {
  color: #ffffff;
}

.blog-card-headline a:hover {
  color: var(--color-sky);
}

.blog-card-abstract {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--text-dim);
  padding-top: 14px;
  border-top: 1px dashed var(--border-subtle);
}

/* 站点地图 sitemap.html 布局 */
.sitemap-map-container {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: 6px;
  padding: 32px 24px;
  margin-bottom: 26px;
  box-shadow: var(--pixel-shadow-md);
}

.sitemap-group-head {
  font-size: 1.28rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-subtle);
}

.sitemap-grid-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 640px) {
  .sitemap-grid-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

.sitemap-node-link {
  font-size: 0.95rem;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.sitemap-node-link:hover {
  color: var(--color-sky);
}

/* 无障碍与动效偏好 */
:focus-visible {
  outline: 2px solid var(--color-sky);
  outline-offset: 2px;
}

@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;
  }
  .spotlight-overlay {
    display: none !important;
  }
}