/**
 * IKUUU (ikuuu.blog) 核心样式表
 * 视觉系统：Electric Indigo & Cyber Mint Bento (极光紫青·数码便当盒高转化风)
 * 特点：双栏非对称排版、数码控制台微交互、便当盒网格(Bento Grid)、流光动效、系统字体栈、极速LCP
 */

:root {
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;

  /* 极光紫青色彩体系 */
  --color-primary: #6366f1;           /* 极光靛蓝 */
  --color-primary-hover: #4f46e5;
  --color-primary-glow: rgba(99, 102, 241, 0.32);
  --color-primary-light: #eef2ff;

  --color-accent: #06b6d4;            /* 赛博青绿 */
  --color-accent-light: #ecfeff;
  --color-emerald: #10b981;           /* 极速绿色 */
  --color-emerald-light: #ecfdf5;
  --color-fuchsia: #d946ef;           /* 霓虹粉紫 */
  --color-amber: #f59e0b;             /* 金橙警告 */

  /* 文字颜色体系 (高对比度) */
  --color-text-main: #0f172a;         /* 深曜石 */
  --color-text-muted: #334155;        /* 墨灰 */
  --color-text-subtle: #64748b;       /* 石板灰 */
  --color-text-light: #94a3b8;

  /* 背景与面板体系 */
  --color-bg-page: #f8fafc;
  --color-bg-card: #ffffff;
  --color-bg-alt: #f1f5f9;
  --color-bg-glass: rgba(255, 255, 255, 0.92);
  --color-bg-card-subtle: #faf5ff;

  /* 边框体系 */
  --color-border: #e2e8f0;
  --color-border-hover: #c7d2fe;
  --color-border-active: #6366f1;

  /* 动态渐变集 */
  --grad-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --grad-primary-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #c026d3 100%);
  --grad-cyan-blue: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --grad-emerald: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --grad-card: linear-gradient(180deg, rgba(238, 242, 255, 0.45) 0%, rgba(255, 255, 255, 1) 100%);
  --grad-hero-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.12) 0%, transparent 70%);

  /* 阴影体系 */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 6px 20px -2px rgba(99, 102, 241, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 36px -4px rgba(99, 102, 241, 0.16), 0 4px 12px -2px rgba(15, 23, 42, 0.05);
  --shadow-card-hover: 0 20px 42px -6px rgba(99, 102, 241, 0.24), 0 6px 16px -2px rgba(15, 23, 42, 0.06);

  /* 几何圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --max-width: 1200px;
  --content-width: 860px;
}

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

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

body {
  font-family: var(--font-family);
  color: var(--color-text-main);
  background-color: var(--color-bg-page);
  background-image: 
    radial-gradient(at 0% 0%, rgba(238, 242, 255, 0.8) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(236, 254, 255, 0.6) 0px, transparent 50%),
    radial-gradient(at 50% 40%, rgba(250, 245, 255, 0.5) 0px, transparent 50%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.site-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ==================================================================
   Header & Navigation (Floating Island Glassmorphism)
   ================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-glass);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 2px 14px rgba(15, 23, 42, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--color-text-main);
  letter-spacing: -0.03em;
}

.site-logo .brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--grad-primary);
  color: #ffffff;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 900;
  box-shadow: 0 4px 14px var(--color-primary-glow);
  transform: rotate(-3deg);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.site-logo:hover .brand-mark {
  transform: rotate(0deg) scale(1.08);
}

.desktop-nav {
  display: none;
  align-items: center;
  gap: 2rem;
  background: #ffffff;
  padding: 0.45rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--color-text-muted);
  position: relative;
  padding: 0.25rem 0.2rem;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.menu-toggle-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 9px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.menu-toggle-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-main);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-nav-drawer {
  display: none;
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem 1.75rem;
  box-shadow: var(--shadow-md);
}

.mobile-nav-drawer.is-active {
  display: block;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-link {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-actions {
  margin-top: 1.25rem;
}

/* ==================================================================
   Buttons with Aurora Shimmer & Glow
   ================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.65rem;
  font-size: 0.975rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  line-height: 1;
}

.btn-primary {
  background: var(--grad-primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 16px var(--color-primary-glow);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 45%;
  height: 200%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.35) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(25deg);
  animation: btn-shimmer 4.5s infinite;
}

@keyframes btn-shimmer {
  0%, 70% { left: -60%; }
  100% { left: 140%; }
}

.btn-primary:hover {
  background: var(--grad-primary-hover);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.42);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--color-text-main);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: #f8fafc;
  border-color: var(--color-border-hover);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
}

.btn-full {
  width: 100%;
}

.btn-lg {
  padding: 0.95rem 2.25rem;
  font-size: 1.05rem;
}

/* ==================================================================
   Hero Section: Split 2-Column Asymmetric Layout
   ================================================================== */
.hero-section {
  padding: 4.5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
    text-align: left;
  }
}

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

@media (min-width: 992px) {
  .hero-left {
    text-align: left;
  }
}

/* 呼吸灯实时状态徽章 */
.hero-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.45rem 1.1rem;
  background-color: #ffffff;
  border: 1px solid #c7d2fe;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 700;
  color: #4338ca;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.1);
  margin-bottom: 1.5rem;
}

.live-pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: #10b981;
  position: relative;
}

.live-pulse-dot::after {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50%;
  background-color: #10b981;
  opacity: 0.6;
  animation: pulse-ring 2s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.9); opacity: 0.8; }
  70% { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.4); opacity: 0; }
}

.hero-title {
  font-size: 2.35rem;
  line-height: 1.25;
  font-weight: 900;
  color: var(--color-text-main);
  margin-bottom: 1.35rem;
  letter-spacing: -0.03em;
}

.hero-title .gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 2.25rem;
  max-width: 620px;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 640px) {
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 992px) {
  .hero-buttons {
    justify-content: flex-start;
  }
}

/* 信任背书条 */
.hero-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
  justify-content: center;
}

@media (min-width: 992px) {
  .hero-trust-row {
    justify-content: flex-start;
  }
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.check-icon {
  color: var(--color-emerald);
  font-weight: 800;
}

/* Hero Right: Live Node Console Panel (实测控制台卡片) */
.hero-console-card {
  background: #ffffff;
  border: 1px solid #c7d2fe;
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: float-slow 6s ease-in-out infinite;
}

@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.25rem;
}

.console-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-text-main);
}

.console-status-pill {
  font-size: 0.75rem;
  font-weight: 700;
  color: #047857;
  background: #d1fae5;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.node-row:hover {
  background: #eef2ff;
  border-color: #c7d2fe;
}

.node-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-main);
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: #059669;
  background: #ecfdf5;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.console-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.825rem;
  color: var(--color-text-subtle);
  font-weight: 600;
}

/* ==================================================================
   Section Common
   ================================================================== */
.section-block {
  padding: 5rem 0;
  position: relative;
}

.section-block-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
  letter-spacing: 0.04em;
}

.section-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: var(--color-text-main);
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-subtle);
  line-height: 1.65;
}

/* ==================================================================
   Bento Grid: Features (4 Cards Asymmetric Layout)
   ================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

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

@media (min-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(12, 1fr);
  }
  .bento-col-7 {
    grid-column: span 7;
  }
  .bento-col-5 {
    grid-column: span 5;
  }
  .bento-col-6 {
    grid-column: span 6;
  }
}

.bento-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.bento-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.35rem;
}

.bento-icon-box {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  font-weight: 800;
  transition: transform 0.25s ease;
}

.bento-card:hover .bento-icon-box {
  transform: scale(1.1) rotate(4deg);
}

.bento-pill {
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.bento-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  color: var(--color-text-main);
}

.bento-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ==================================================================
   Streaming & AI Ecosystem
   ================================================================== */
.ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

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

.ecosystem-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.ecosystem-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.ecosystem-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.ecosystem-badge {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.ecosystem-card-title {
  font-size: 1.35rem;
  font-weight: 800;
}

.pill-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.5rem 0;
}

.platform-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  background-color: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
  transition: all 0.2s ease;
}

.platform-pill:hover {
  border-color: var(--color-primary);
  background-color: #eef2ff;
  color: var(--color-primary);
  transform: translateY(-2px);
}

.platform-pill.pill-ai {
  background-color: #f5f3ff;
  color: #7c3aed;
  border-color: #ddd6fe;
}

.platform-pill.pill-ai:hover {
  background-color: #ede9fe;
}

.ecosystem-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

.ecosystem-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ==================================================================
   Benefits Section
   ================================================================== */
.benefits-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

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

.benefit-item {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.benefit-item:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.benefit-num {
  font-size: 1rem;
  font-weight: 900;
  color: var(--color-primary);
  margin-bottom: 0.65rem;
  letter-spacing: 0.05em;
}

.benefit-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.65rem;
}

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

/* ==================================================================
   Use Cases (3 Cards with Anime Life Scenarios)
   ================================================================== */
.use-cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

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

.use-case-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.use-case-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.use-case-top {
  margin-bottom: 1.5rem;
}

.use-case-device {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.use-case-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
}

.use-case-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.use-case-footer {
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  font-weight: 600;
}

/* ==================================================================
   Pricing Section (3 Tiers with High-Conversion Ribbons)
   ================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: stretch;
}

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

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.75rem 2rem 2.25rem;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.pricing-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.pricing-card.is-popular {
  border: 2px solid var(--color-primary);
  background: linear-gradient(180deg, #f5f3ff 0%, #ffffff 30%);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
}

.pricing-card.is-popular:hover {
  box-shadow: 0 24px 48px -4px rgba(99, 102, 241, 0.35);
  transform: scale(1.02) translateY(-4px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-primary);
  color: #ffffff;
  padding: 0.35rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 14px var(--color-primary-glow);
}

.pricing-audience {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}

.pricing-name {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 0.65rem;
}

.pricing-desc {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  margin-bottom: 1.75rem;
  min-height: 44px;
}

.pricing-price {
  margin-bottom: 2rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--color-border);
}

.price-unit {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.price-num {
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1;
}

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

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
  margin-bottom: 2.25rem;
  flex-grow: 1;
}

.pricing-feature-row {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ==================================================================
   FAQ Accordion (Polished with Number Badge & Smooth Arrow)
   ================================================================== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
}

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

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.35rem 1.75rem;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-main);
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  width: 22px;
  height: 22px;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background-color: var(--color-primary);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 2px;
}

.faq-icon::before {
  width: 14px;
  height: 2.5px;
}

.faq-icon::after {
  width: 2.5px;
  height: 14px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.faq-item.is-open {
  border-color: var(--color-primary);
}

.faq-item.is-open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-answer {
  display: none;
  padding: 0 1.75rem 1.5rem;
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.faq-item.is-open .faq-answer {
  display: block;
}

/* ==================================================================
   Final CTA Banner (Deep Purple Cyber Horizon)
   ================================================================== */
.final-cta-section {
  padding: 5.5rem 0;
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
  color: #ffffff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta-section::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 140%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(168, 85, 247, 0.2) 0%, transparent 60%);
  pointer-events: none;
}

.final-cta-content {
  max-width: 780px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.final-cta-title {
  font-size: 2.35rem;
  font-weight: 900;
  margin-bottom: 1.25rem;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.final-cta-desc {
  font-size: 1.15rem;
  color: #c7d2fe;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

/* ==================================================================
   Footer (Compliant with Layer 2: Only Nav & Mandatory Disclosure)
   ================================================================== */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2.5rem;
  font-size: 0.925rem;
  color: var(--color-text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

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

.footer-col-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 1.25rem;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--color-text-muted);
  font-weight: 500;
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-disclaimer-note {
  font-size: 0.85rem;
  color: var(--color-text-subtle);
  line-height: 1.6;
  margin-top: 1rem;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  align-items: center;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
}

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

/* ==================================================================
   Mobile Sticky Bar
   ================================================================== */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  border-top: 1px solid var(--color-border);
  padding: 0.85rem 1.25rem;
  box-shadow: 0 -6px 20px rgba(15, 23, 42, 0.08);
  z-index: 99;
}

.mobile-sticky-bar.is-visible {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sticky-text {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.sticky-sub {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

/* ==================================================================
   Inner Pages & SEO Articles Layout
   ================================================================== */
.page-hero {
  padding: 3.5rem 0 2.5rem;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  margin-bottom: 1rem;
  font-weight: 500;
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

.breadcrumb-sep {
  color: var(--color-border);
}

.page-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1.3;
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
}

.content-wrapper {
  max-width: var(--content-width);
  margin: 3.5rem auto 4.5rem;
  padding: 0 1.25rem;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--color-text-main);
  background: #f5f3ff;
  border-left: 4px solid var(--color-primary);
  padding: 1.35rem 1.65rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2.5rem;
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin: 2.75rem 0 1.15rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border);
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin: 1.85rem 0 0.85rem;
}

.article-body p {
  margin-bottom: 1.35rem;
}

.article-body ul,
.article-body ol {
  margin: 1rem 0 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.article-body li {
  line-height: 1.75;
}

.data-table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.data-table th,
.data-table td {
  padding: 0.95rem 1.35rem;
  border-bottom: 1px solid var(--color-border);
}

.data-table th {
  background-color: var(--color-bg-alt);
  font-weight: 700;
  color: var(--color-text-main);
}

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

.article-cta-box {
  background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  margin: 3.5rem 0;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.article-cta-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
}

.article-cta-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 1.75rem;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.related-articles-box {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem 2rem;
  margin-top: 4rem;
  box-shadow: var(--shadow-sm);
}

.related-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
}

.related-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.related-list a {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==================================================================
   Guides Aggregation Page (tutorials.html)
   ================================================================== */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

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

.guide-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.guide-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.guide-card-tag {
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 0.85rem;
}

.guide-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
  line-height: 1.4;
}

.guide-card-title a {
  color: var(--color-text-main);
}

.guide-card-title a:hover {
  color: var(--color-primary);
}

.guide-card-summary {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.guide-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}