/* ==========================================================================
   IKUUU - Warm Anime Design System (暖色系动漫风)
   Domain: ikuuu.lol | Build Date: 2026-09-11
   Style: Sunset Anime / Cel-shaded Warmth / Vibrant Pop / High-legibility
   Zero external fonts, Zero CDN, High performance.
   ========================================================================== */

:root {
  /* Warm Anime Color Palette */
  --ik-bg: #FFFDF8;
  --ik-surface: #FFF7ED;
  --ik-surface-card: #FFFFFF;
  
  --ik-primary: #FF6536;
  --ik-primary-hover: #FF501E;
  --ik-primary-light: #FFF0EB;
  --ik-primary-glow: rgba(255, 101, 54, 0.22);
  
  --ik-secondary: #F59E0B;
  --ik-secondary-light: #FEF3C7;
  
  --ik-accent-blue: #3B82F6;
  --ik-accent-blue-light: #EFF6FF;
  
  --ik-accent-pink: #F43F5E;
  --ik-accent-pink-light: #FFF1F2;
  
  --ik-accent-green: #10B981;
  --ik-accent-green-light: #ECFDF5;
  
  --ik-text-main: #2C1E18;
  --ik-text-muted: #786053;
  --ik-text-subtle: #A38A7E;
  
  --ik-border: #FCE7D6;
  --ik-border-hover: #FFB499;
  --ik-border-active: #FF6536;

  /* Typography Stacks (Native, Zero Blocking) */
  --ik-font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ik-font-display: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ik-font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;

  /* Rounded Geometry */
  --ik-radius-sm: 8px;
  --ik-radius-md: 14px;
  --ik-radius-lg: 20px;
  --ik-radius-pill: 9999px;

  /* Anime Soft Glow & Shadows */
  --ik-shadow-sm: 0 2px 8px rgba(255, 101, 54, 0.08), 0 1px 3px rgba(44, 30, 24, 0.04);
  --ik-shadow-md: 0 8px 24px rgba(255, 101, 54, 0.12), 0 2px 6px rgba(44, 30, 24, 0.04);
  --ik-shadow-lg: 0 16px 36px rgba(255, 101, 54, 0.16), 0 4px 12px rgba(44, 30, 24, 0.05);
  --ik-shadow-hover: 0 12px 28px rgba(255, 101, 54, 0.22), 0 4px 10px rgba(44, 30, 24, 0.06);

  --ik-max-width: 1120px;
}

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

html {
  font-family: var(--ik-font-sans);
  background-color: var(--ik-bg);
  color: var(--ik-text-main);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--ik-bg);
  position: relative;
}

/* Dynamic Anime Canvas Background */
.ik-anime-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
}

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

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

/* Container */
.ik-container {
  width: 100%;
  max-width: var(--ik-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Sections */
.ik-section {
  padding: 72px 0;
  position: relative;
  z-index: 1;
}

.ik-section--alt {
  background-color: var(--ik-surface);
  border-top: 1px solid var(--ik-border);
  border-bottom: 1px solid var(--ik-border);
}

/* Anime Chapter Tag & Section Headers */
.ik-section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 48px auto;
  position: relative;
  z-index: 1;
}

.ik-act-tag {
  display: inline-block;
  font-family: var(--ik-font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  color: var(--ik-primary);
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 5px 18px;
  border: 1.5px solid var(--ik-primary);
  background-color: var(--ik-primary-light);
  border-radius: var(--ik-radius-pill);
  font-weight: 700;
  box-shadow: 0 2px 8px var(--ik-primary-glow);
}

.ik-section-header__title {
  font-family: var(--ik-font-display);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--ik-text-main);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  line-height: 1.35;
}

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

/* Header & Navigation */
.ik-header {
  background-color: rgba(255, 253, 248, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1.5px solid var(--ik-border);
}

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

.ik-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--ik-font-display);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--ik-text-main);
  letter-spacing: -0.02em;
}

.ik-logo__mark {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--ik-primary) 0%, #FFA07A 100%);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.25rem;
  border-radius: var(--ik-radius-md);
  box-shadow: 0 4px 12px var(--ik-primary-glow);
}

.ik-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ik-nav__link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ik-text-muted);
  padding: 8px 16px;
  border-radius: var(--ik-radius-pill);
  transition: all 0.2s ease;
}

.ik-nav__link:hover {
  color: var(--ik-primary);
  background-color: var(--ik-primary-light);
}

.ik-nav-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--ik-border);
  padding: 8px;
  border-radius: var(--ik-radius-sm);
  color: var(--ik-text-main);
  cursor: pointer;
}

.ik-nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* Buttons (Anime Pill & Spring) */
.ik-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ik-font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 11px 24px;
  border-radius: var(--ik-radius-pill);
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  min-height: 44px;
  min-width: 44px;
  text-align: center;
  border: 2px solid transparent;
}

.ik-btn:hover {
  transform: translateY(-2px);
}

.ik-btn:active {
  transform: scale(0.97);
}

a.ik-btn,
button.ik-btn,
.ik-btn {
  text-decoration: none !important;
}

a.ik-btn--primary,
button.ik-btn--primary,
.ik-btn--primary,
.ik-content .ik-btn--primary,
.ik-article-body .ik-btn--primary,
.ik-article-cta-box .ik-btn--primary {
  background: linear-gradient(135deg, var(--ik-primary) 0%, #FF7F50 100%) !important;
  color: #FFFFFF !important;
  border-color: var(--ik-primary) !important;
  text-decoration: none !important;
  box-shadow: 0 4px 14px var(--ik-primary-glow);
}

a.ik-btn--primary:hover,
button.ik-btn--primary:hover,
.ik-btn--primary:hover,
.ik-content .ik-btn--primary:hover,
.ik-article-body .ik-btn--primary:hover,
.ik-article-cta-box .ik-btn--primary:hover {
  background: linear-gradient(135deg, var(--ik-primary-hover) 0%, #FF6B4A 100%) !important;
  color: #FFFFFF !important;
  text-decoration: none !important;
  box-shadow: 0 6px 18px rgba(255, 101, 54, 0.35);
}

a.ik-btn--outline,
button.ik-btn--outline,
.ik-btn--outline,
.ik-content .ik-btn--outline,
.ik-article-body .ik-btn--outline {
  background-color: #FFFFFF !important;
  color: var(--ik-primary) !important;
  border: 2px solid var(--ik-border) !important;
  text-decoration: none !important;
}

a.ik-btn--outline:hover,
button.ik-btn--outline:hover,
.ik-btn--outline:hover,
.ik-content .ik-btn--outline:hover,
.ik-article-body .ik-btn--outline:hover {
  border-color: var(--ik-primary) !important;
  background-color: var(--ik-primary-light) !important;
  color: var(--ik-primary) !important;
  text-decoration: none !important;
}

.ik-btn--large {
  padding: 14px 32px;
  font-size: 1.05rem;
}

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

/* Hero Section with Anime Landscape & Character Background */
.ik-hero {
  padding: 84px 0 76px 0;
  text-align: center;
  position: relative;
  z-index: 1;
  overflow: hidden;
  background-color: #FFFDF8;
}

.ik-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("anime-hero-bg.webp");
  background-size: cover;
  background-position: center 30%;
  opacity: 0.88;
  pointer-events: none;
  z-index: 0;
  filter: saturate(1.25) contrast(1.1);
}

.ik-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.12) 0%, rgba(255, 253, 248, 0.05) 50%, rgba(255, 253, 248, 0.75) 85%, #FFFDF8 100%);
  pointer-events: none;
  z-index: 0;
}

.ik-hero__inner {
  max-width: 840px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(255, 253, 248, 0.92);
  border: 2px solid #FFB499;
  border-radius: 28px;
  padding: 48px 36px 40px 36px;
  box-shadow: 0 20px 50px rgba(255, 101, 54, 0.16), 0 4px 14px rgba(44, 30, 24, 0.06);
}

/* Anime Status Badge */
.ik-hero__anime-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--ik-primary);
  background: linear-gradient(135deg, var(--ik-primary-light) 0%, #FFF7ED 100%);
  border: 1.5px solid var(--ik-border-hover);
  padding: 6px 18px;
  border-radius: var(--ik-radius-pill);
  margin-bottom: 20px;
  box-shadow: 0 4px 14px var(--ik-primary-glow);
}

.ik-anime-pulse {
  width: 8px;
  height: 8px;
  background-color: var(--ik-accent-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--ik-accent-green);
  display: inline-block;
  animation: ikPulse 1.8s infinite ease-in-out;
}

@keyframes ikPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}

.ik-hero__title {
  font-family: var(--ik-font-display);
  font-size: 2.9rem;
  font-weight: 900;
  color: var(--ik-text-main);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.ik-hero__subtitle {
  font-size: 1.15rem;
  color: var(--ik-text-muted);
  line-height: 1.7;
  max-width: 680px;
  margin: 0 auto 32px auto;
}

.ik-hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

/* Anime Perk Badges */
.ik-anime-perks {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.ik-anime-perk {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ik-text-main);
  background-color: #FFFFFF;
  border: 1.5px solid var(--ik-border);
  padding: 5px 14px;
  border-radius: var(--ik-radius-pill);
  box-shadow: var(--ik-shadow-sm);
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.2s ease, box-shadow 0.2s ease;
}

.ik-anime-perk:hover {
  transform: translateY(-2px);
  border-color: var(--ik-primary);
  box-shadow: 0 4px 12px var(--ik-primary-glow);
}

.ik-hero__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.ik-hero__meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ik-text-muted);
  background-color: #FFFFFF;
  padding: 6px 14px;
  border-radius: var(--ik-radius-pill);
  border: 1.5px solid var(--ik-border);
  box-shadow: var(--ik-shadow-sm);
}

.ik-hero__meta-item svg {
  width: 17px;
  height: 17px;
  color: var(--ik-primary);
}

/* Grids */
.ik-grid {
  display: grid;
  gap: 24px;
}

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

.ik-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.ik-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Anime Cel-shaded Cards */
.ik-card {
  background-color: var(--ik-surface-card);
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-lg);
  padding: 32px 26px;
  box-shadow: var(--ik-shadow-sm);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
  overflow: hidden;
}

.ik-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--ik-primary), transparent);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.ik-card:hover {
  transform: translateY(-5px);
  border-color: var(--ik-border-hover);
  box-shadow: var(--ik-shadow-hover);
}

.ik-card:hover::before {
  opacity: 1;
}

.ik-card__icon-box {
  width: 52px;
  height: 52px;
  background-color: var(--ik-primary-light);
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--ik-primary);
}

.ik-card__icon-box svg {
  width: 26px;
  height: 26px;
}

.ik-card__title {
  font-family: var(--ik-font-display);
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--ik-text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.ik-card__desc {
  font-size: 0.95rem;
  color: var(--ik-text-muted);
  line-height: 1.65;
}

/* Streaming & AI Modules */
.ik-service-block {
  margin-bottom: 48px;
}

.ik-service-block:last-child {
  margin-bottom: 0;
}

.ik-service-block__title {
  font-family: var(--ik-font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ik-text-main);
  margin-bottom: 8px;
  text-align: center;
}

.ik-service-block__desc {
  font-size: 0.95rem;
  color: var(--ik-text-muted);
  text-align: center;
  margin-bottom: 24px;
}

.ik-badge-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.ik-badge-item {
  background-color: #FFFFFF;
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-md);
  padding: 18px 12px;
  text-align: center;
  box-shadow: var(--ik-shadow-sm);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}

.ik-badge-item:hover {
  transform: translateY(-4px);
  border-color: var(--ik-border-hover);
  box-shadow: var(--ik-shadow-hover);
}

.ik-badge-item__icon {
  width: 38px;
  height: 38px;
  background-color: var(--ik-surface);
  border-radius: var(--ik-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 10px auto;
  color: var(--ik-primary);
}

.ik-badge-item__icon svg {
  width: 20px;
  height: 20px;
}

.ik-badge-item__name {
  font-family: var(--ik-font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ik-text-main);
  margin-bottom: 4px;
}

.ik-badge-item__status {
  font-size: 0.78rem;
  color: var(--ik-primary);
  background-color: var(--ik-primary-light);
  padding: 2px 8px;
  border-radius: var(--ik-radius-pill);
  display: inline-block;
  font-weight: 600;
}

/* Scenarios */
.ik-scenario-card {
  background-color: #FFFFFF;
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-lg);
  padding: 30px;
  box-shadow: var(--ik-shadow-sm);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
}

.ik-scenario-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--ik-shadow-hover);
}

.ik-scenario-card__header {
  margin-bottom: 14px;
}

.ik-scenario-card__title {
  font-family: var(--ik-font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ik-text-main);
  margin-bottom: 6px;
}

.ik-scenario-card__device {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--ik-secondary);
  background-color: var(--ik-secondary-light);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--ik-radius-pill);
}

.ik-scenario-card__desc {
  font-size: 0.95rem;
  color: var(--ik-text-muted);
  line-height: 1.65;
}

/* Pricing Cards */
.ik-pricing-card {
  background-color: #FFFFFF;
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--ik-shadow-sm);
  position: relative;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
}

.ik-pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--ik-shadow-hover);
}

.ik-pricing-card--popular {
  border: 2px solid var(--ik-primary);
  box-shadow: var(--ik-shadow-md);
  background: linear-gradient(180deg, #FFFDFB 0%, #FFFFFF 100%);
}

.ik-pricing-card__badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background: linear-gradient(135deg, var(--ik-secondary) 0%, var(--ik-primary) 100%);
  color: #FFFFFF;
  font-family: var(--ik-font-display);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--ik-radius-pill);
  box-shadow: 0 4px 10px var(--ik-primary-glow);
}

/* Comic Speech Bubble */
.ik-speech-bubble {
  position: absolute;
  top: -38px;
  left: 24px;
  background-color: #FEF3C7;
  border: 1.5px solid #F59E0B;
  color: #B45309;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: var(--ik-radius-pill);
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.2);
}

.ik-speech-bubble::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 16px;
  border-width: 6px 6px 0;
  border-style: solid;
  border-color: #FEF3C7 transparent;
  display: block;
  width: 0;
}

.ik-pricing-card__title {
  font-family: var(--ik-font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ik-text-main);
  margin-bottom: 6px;
}

.ik-pricing-card__target {
  font-size: 0.88rem;
  color: var(--ik-text-muted);
  margin-bottom: 20px;
}

.ik-pricing-card__price {
  font-family: var(--ik-font-display);
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--ik-primary);
  margin-bottom: 24px;
  line-height: 1;
}

.ik-pricing-card__price span:last-child {
  font-size: 1rem;
  font-weight: 500;
  color: var(--ik-text-muted);
}

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

.ik-pricing-card__feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--ik-text-muted);
  line-height: 1.5;
}

.ik-pricing-card__feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--ik-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

/* FAQ Details/Summary Accordion */
.ik-faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ik-faq-detail {
  background-color: #FFFFFF;
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-md);
  box-shadow: var(--ik-shadow-sm);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ik-faq-detail[open] {
  border-color: var(--ik-border-hover);
  box-shadow: var(--ik-shadow-md);
}

.ik-faq-summary {
  font-family: var(--ik-font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ik-text-main);
  padding: 18px 24px;
  cursor: pointer;
  list-style: none;
  position: relative;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.ik-faq-summary::after {
  content: "+";
  font-family: var(--ik-font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ik-primary);
  transition: transform 0.2s ease;
}

.ik-faq-detail[open] .ik-faq-summary::after {
  content: "-";
  transform: rotate(180deg);
}

.ik-faq-answer {
  padding: 0 24px 20px 24px;
  font-size: 0.95rem;
  color: var(--ik-text-muted);
  line-height: 1.7;
}

/* Final CTA with Cozy Anime Scene Background */
.ik-final-cta {
  padding: 88px 0;
  text-align: center;
  border-top: 1.5px solid var(--ik-border);
  border-bottom: 1.5px solid var(--ik-border);
  position: relative;
  z-index: 1;
  overflow: hidden;
  background-color: #FFFDF8;
}

.ik-final-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("anime-scene.webp");
  background-size: cover;
  background-position: center 40%;
  opacity: 0.85;
  pointer-events: none;
  z-index: 0;
  filter: saturate(1.22) contrast(1.08);
}

.ik-final-cta::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.4) 0%, rgba(255, 253, 248, 0.15) 30%, rgba(255, 253, 248, 0.15) 70%, rgba(255, 253, 248, 0.55) 100%);
  pointer-events: none;
  z-index: 0;
}

.ik-final-cta__inner {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(255, 253, 248, 0.92);
  border: 2px solid #FFB499;
  border-radius: 28px;
  padding: 50px 36px;
  box-shadow: 0 20px 50px rgba(255, 101, 54, 0.16);
}

.ik-final-cta__title {
  font-family: var(--ik-font-display);
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--ik-text-main);
  margin-bottom: 12px;
}

.ik-final-cta__subtitle {
  font-size: 1.1rem;
  color: var(--ik-text-muted);
  margin-bottom: 30px;
}

/* Mobile Sticky Bottom CTA */
.ik-mobile-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 253, 248, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1.5px solid var(--ik-border);
  padding: 10px 16px;
  z-index: 99;
  display: none;
  box-shadow: 0 -4px 16px rgba(255, 101, 54, 0.1);
}

.ik-mobile-cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.ik-mobile-cta__text {
  font-family: var(--ik-font-display);
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--ik-text-main);
}

.ik-mobile-cta__sub {
  font-size: 0.78rem;
  color: var(--ik-text-muted);
}

/* Footer */
.ik-footer {
  background-color: #FFFFFF;
  border-top: 1.5px solid var(--ik-border);
  padding: 44px 0 32px 0;
  margin-top: auto;
  position: relative;
  z-index: 1;
}

.ik-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.ik-footer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.ik-footer__nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.ik-footer__nav a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ik-text-muted);
  transition: color 0.2s ease;
}

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

.ik-footer__bottom {
  border-top: 1px solid var(--ik-border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--ik-text-subtle);
}

.ik-footer__disclosure {
  color: var(--ik-text-muted);
  font-weight: 500;
}

/* Breadcrumb & Article Pages */
.ik-breadcrumb {
  padding: 16px 0;
  font-size: 0.88rem;
  color: var(--ik-text-subtle);
  position: relative;
  z-index: 1;
}

.ik-breadcrumb__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.ik-breadcrumb__item::after {
  content: "✦";
  font-size: 0.7rem;
  color: var(--ik-primary);
  margin-left: 8px;
}

.ik-breadcrumb__item:last-child::after {
  display: none;
}

.ik-breadcrumb__link {
  color: var(--ik-text-muted);
  font-weight: 600;
  transition: color 0.2s ease;
}

.ik-breadcrumb__link:hover {
  color: var(--ik-primary);
}

.ik-breadcrumb__current {
  color: var(--ik-text-main);
  font-weight: 700;
}

.ik-breadcrumb__sep {
  margin: 0 8px;
  color: var(--ik-border-hover);
  font-size: 0.85rem;
  user-select: none;
}

.ik-breadcrumb a {
  color: var(--ik-text-muted);
  transition: color 0.2s ease;
}

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


/* ==========================================================================
   Master Article Typography & Layout System (排版美化与视觉秩序)
   ========================================================================== */
.ik-article-header {
  padding: 44px 0 32px 0;
  border-bottom: 1.5px solid var(--ik-border);
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
  background: radial-gradient(circle at 50% 0%, rgba(255, 247, 237, 0.8) 0%, transparent 70%);
}

.ik-article-header__meta {
  font-size: 0.88rem;
  color: var(--ik-text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.ik-article-header__title {
  font-family: var(--ik-font-display);
  font-size: 2.35rem;
  font-weight: 900;
  color: var(--ik-text-main);
  line-height: 1.32;
  letter-spacing: -0.015em;
  margin-bottom: 18px;
}

.ik-article-header__lead {
  font-size: 1.08rem;
  line-height: 1.82;
  color: #5C4436;
  background: linear-gradient(135deg, #FFF7ED 0%, #FFFDF8 100%);
  border-left: 4px solid var(--ik-primary);
  border-radius: 0 var(--ik-radius-md) var(--ik-radius-md) 0;
  padding: 20px 24px;
  margin-top: 20px;
  box-shadow: 0 2px 12px rgba(255, 101, 54, 0.05);
  border-top: 1px solid var(--ik-border);
  border-right: 1px solid var(--ik-border);
  border-bottom: 1px solid var(--ik-border);
}

/* Master Article Container (Aligned with 820px header) */
.ik-content,
.ik-article-body {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.06rem;
  line-height: 1.85;
  color: #2D201A;
  position: relative;
  z-index: 1;
}

.ik-content h2,
.ik-article-body h2 {
  font-family: var(--ik-font-display);
  font-size: 1.62rem;
  font-weight: 800;
  color: var(--ik-text-main);
  margin: 52px 0 22px 0;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ik-border);
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}

.ik-content h2::before,
.ik-article-body h2::before {
  content: "✦";
  color: var(--ik-primary);
  font-size: 1.15rem;
  display: inline-block;
}

.ik-content h3,
.ik-article-body h3 {
  font-family: var(--ik-font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #3D2B22;
  margin: 36px 0 16px 0;
}

.ik-content p,
.ik-article-body p {
  margin-bottom: 22px;
  color: #382820;
}

.ik-content strong,
.ik-article-body strong {
  color: #1A100B;
  font-weight: 700;
}

.ik-content a:not(.ik-btn),
.ik-article-body a:not(.ik-btn) {
  color: var(--ik-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 600;
  transition: color 0.2s ease;
}

.ik-content a:not(.ik-btn):hover,
.ik-article-body a:not(.ik-btn):hover {
  color: var(--ik-primary-hover);
}

/* Article Lists */
.ik-content ul,
.ik-article-body ul {
  margin: 20px 0 28px 0;
  padding-left: 0;
  list-style: none;
}

.ik-content ul li,
.ik-article-body ul li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 14px;
  line-height: 1.75;
  color: #382820;
}

.ik-content ul li::before,
.ik-article-body ul li::before {
  content: "✦";
  position: absolute;
  left: 8px;
  top: 0;
  color: var(--ik-primary);
  font-size: 0.85rem;
  line-height: 2.1;
}

.ik-content ol,
.ik-article-body ol {
  margin: 20px 0 28px 24px;
  padding-left: 8px;
}

.ik-content ol li,
.ik-article-body ol li {
  margin-bottom: 14px;
  line-height: 1.75;
  color: #382820;
}

/* Responsive Modern Tables */
.ik-content table,
.ik-article-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 32px 0 36px 0;
  background-color: #FFFFFF;
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-md);
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(255, 101, 54, 0.05);
}

.ik-content th,
.ik-article-body th {
  background: linear-gradient(180deg, #FFF7ED 0%, #FFEDE0 100%);
  color: var(--ik-text-main);
  font-family: var(--ik-font-display);
  font-size: 0.94rem;
  font-weight: 800;
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1.5px solid var(--ik-border);
  white-space: nowrap;
}

.ik-content td,
.ik-article-body td {
  padding: 14px 18px;
  font-size: 0.94rem;
  color: #403028;
  border-bottom: 1px solid var(--ik-border);
  line-height: 1.62;
}

.ik-content tr:last-child td,
.ik-article-body tr:last-child td {
  border-bottom: none;
}

.ik-content tr:nth-child(even) td,
.ik-article-body tr:nth-child(even) td {
  background-color: #FFFDFB;
}

.ik-content tr:hover td,
.ik-article-body tr:hover td {
  background-color: #FFF7EE;
}

@media (max-width: 768px) {
  .ik-content table,
  .ik-article-body table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
}

/* Article FAQ List */
.ik-content .ik-faq-list,
.ik-article-body .ik-faq-list {
  margin: 28px 0 36px 0;
}

/* High-Converting Article CTA Box */
.ik-article-cta-box,
.ik-article-cta {
  background: linear-gradient(135deg, #FFF0EB 0%, #FFFDF8 50%, #FEF3C7 100%);
  border: 2px solid var(--ik-border-hover);
  border-radius: var(--ik-radius-lg);
  padding: 40px 32px;
  margin: 52px 0 28px 0;
  text-align: center;
  box-shadow: 0 8px 24px rgba(255, 101, 54, 0.1);
  position: relative;
  overflow: hidden;
}

.ik-article-cta-box::before,
.ik-article-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--ik-secondary), var(--ik-primary));
}

.ik-article-cta-box h3,
.ik-article-cta h3,
.ik-article-cta__title {
  font-family: var(--ik-font-display);
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--ik-text-main);
  margin: 0 0 12px 0;
}

.ik-article-cta-box p,
.ik-article-cta p,
.ik-article-cta__desc {
  font-size: 1.02rem;
  color: var(--ik-text-muted);
  max-width: 580px;
  margin: 0 auto 24px auto;
  line-height: 1.65;
}

/* Guides Hub Card Styling */
.ik-guide-card {
  background-color: #FFFFFF;
  border: 1.5px solid var(--ik-border);
  border-radius: var(--ik-radius-lg);
  padding: 30px 26px;
  box-shadow: var(--ik-shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}

.ik-guide-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--ik-shadow-hover);
  border-color: var(--ik-border-hover);
}

.ik-guide-card__thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--ik-radius-md);
  background-color: var(--ik-primary-light);
  color: var(--ik-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.ik-guide-card__thumb svg {
  width: 26px;
  height: 26px;
}

.ik-guide-card__meta {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ik-text-subtle);
  margin-bottom: 10px;
}

.ik-guide-card__title {
  font-family: var(--ik-font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ik-text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}

.ik-guide-card__title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.ik-guide-card__title a:hover {
  color: var(--ik-primary);
}

.ik-guide-card__desc {
  font-size: 0.94rem;
  color: var(--ik-text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.ik-guide-card__link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ik-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  transition: gap 0.2s ease;
}

.ik-guide-card__link::after {
  content: "→";
  font-family: var(--ik-font-mono);
  transition: transform 0.2s ease;
}

.ik-guide-card:hover .ik-guide-card__link::after {
  transform: translateX(4px);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .ik-badge-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .ik-grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  body {
    padding-bottom: 64px;
  }
  .ik-section {
    padding: 52px 0;
  }
  .ik-hero {
    padding: 36px 0 28px 0;
  }
  .ik-hero__inner {
    padding: 30px 16px 26px 16px;
    border-radius: 20px;
  }
  .ik-final-cta {
    padding: 52px 0;
  }
  .ik-final-cta__inner {
    padding: 34px 18px;
    border-radius: 20px;
  }
  .ik-hero__title {
    font-size: 2.1rem;
  }
  .ik-hero__subtitle {
    font-size: 1.02rem;
  }
  .ik-grid--2, .ik-grid--3, .ik-grid--4 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .ik-badge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ik-nav-toggle {
    display: block;
  }
  .ik-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: var(--ik-bg);
    border-bottom: 1.5px solid var(--ik-border);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 8px 20px rgba(255, 101, 54, 0.08);
  }
  .ik-nav--open {
    display: flex;
  }
  .ik-footer__top {
    flex-direction: column;
    align-items: flex-start;
  }
  .ik-footer__nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

@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;
  }
}

/* Mechanical Number Counter Styling */
.ik-counter {
  display: inline-block;
  font-family: var(--ik-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* Tactile Spring Micro-Interactions */
.ik-card,
.ik-scenario-card,
.ik-pricing-card,
.ik-badge-item {
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform, box-shadow;
}

.ik-btn {
  transform: translateZ(0);
  will-change: transform;
}


/* ==========================================================================
   Silky GPU-Composited Scroll Reveal (Butter-smooth, Zero Frame-Drops)
   ========================================================================== */
.ik-reveal {
  opacity: 0;
  transform: translateY(14px) translateZ(0);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.ik-reveal.ik-revealed {
  opacity: 1;
  transform: translateY(0) translateZ(0);
}

/* Staggered Grid Item Delays (Handled natively by GPU Compositor) */
.ik-grid .ik-reveal:nth-child(1) { transition-delay: 0ms; }
.ik-grid .ik-reveal:nth-child(2) { transition-delay: 50ms; }
.ik-grid .ik-reveal:nth-child(3) { transition-delay: 100ms; }
.ik-grid .ik-reveal:nth-child(4) { transition-delay: 150ms; }

.ik-badge-grid .ik-reveal:nth-child(1) { transition-delay: 0ms; }
.ik-badge-grid .ik-reveal:nth-child(2) { transition-delay: 30ms; }
.ik-badge-grid .ik-reveal:nth-child(3) { transition-delay: 60ms; }
.ik-badge-grid .ik-reveal:nth-child(4) { transition-delay: 90ms; }
.ik-badge-grid .ik-reveal:nth-child(5) { transition-delay: 120ms; }
.ik-badge-grid .ik-reveal:nth-child(6) { transition-delay: 150ms; }