/* ==========================================================================
   猫猫云 (CatCloud) - Japanese Zen & Ink-Wash Minimalist Stylesheet
   Color Palette:
     - Rice-paper background: #F4EFE4
     - Ink black:             #211E19
     - Vermilion seal red:    #B8432F
     - Stone gray:            #8A8274
     - Hairline rules:        #D9D1BF
   Design Philosophy:
     - Extreme whitespace, asymmetric balance, hairline dividers instead of cards
     - No drop shadows anywhere
     - At most one vermilion accent per section
     - Vertical writing decorative elements
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,600;0,700;1,400&family=Noto+Serif+SC:wght@300;400;600;700;900&display=swap');

:root {
  --bg-rice-paper: #F4EFE4;
  --bg-rice-paper-soft: #EDE6D8;
  --ink-black: #211E19;
  --vermilion-red: #B8432F;
  --stone-gray: #8A8274;
  --hairline: #D9D1BF;
  --font-serif-cn: "Noto Serif SC", "Songti SC", "Source Han Serif SC", STSong, SimSun, serif;
  --font-latin: "Cormorant Garamond", "Times New Roman", Georgia, serif;
  --max-width: 1180px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  box-shadow: none !important; /* Strict Zen: Zero drop shadows */
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-rice-paper);
  color: var(--ink-black);
}

body {
  font-family: var(--font-serif-cn);
  line-height: 1.85;
  background-color: var(--bg-rice-paper);
  color: var(--ink-black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* Subtle rice-paper texture simulation */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  background-image: radial-gradient(rgba(33, 30, 25, 0.02) 1px, transparent 0);
  background-size: 24px 24px;
  z-index: 9999;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease, border-color 0.3s ease;
}

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

/* Container */
.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Header & Navigation */
header.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(244, 239, 228, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
  z-index: 1000;
  padding: 1.2rem 0;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.logo-svg {
  width: 46px;
  height: 46px;
}

.brand-meta {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--ink-black);
}

.brand-en {
  font-family: var(--font-latin);
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: var(--stone-gray);
  font-style: italic;
}

/* Navigation Links */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2.2rem;
}

.nav-link {
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--stone-gray);
  position: relative;
  padding-bottom: 4px;
}

.nav-link:hover, .nav-link.active {
  color: var(--ink-black);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1px;
  background-color: var(--vermilion-red);
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
  left: 0;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 1.2rem;
  border: 1px solid var(--ink-black);
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  color: var(--ink-black);
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background-color: var(--ink-black);
  color: var(--bg-rice-paper);
}

/* Vermilion Seal Stamp */
.vermilion-seal {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--vermilion-red);
  color: #F4EFE4;
  width: 32px;
  height: 32px;
  font-size: 11px;
  line-height: 1.1;
  font-weight: 700;
  border-radius: 2px;
  user-select: none;
  flex-shrink: 0;
}

/* Vertical Decorative Calligraphy Text */
.vertical-seal-text {
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: 0.35em;
  font-family: var(--font-serif-cn);
  font-size: 0.85rem;
  color: var(--stone-gray);
  user-select: none;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2.2rem;
  background-color: var(--ink-black);
  color: var(--bg-rice-paper);
  border: 1px solid var(--ink-black);
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  font-family: var(--font-serif-cn);
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 46px;
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--ink-black);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2.2rem;
  background-color: transparent;
  color: var(--ink-black);
  border: 1px solid var(--hairline);
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  font-family: var(--font-serif-cn);
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 46px;
}

.btn-secondary:hover {
  border-color: var(--ink-black);
  background-color: rgba(33, 30, 25, 0.04);
}

.btn-outline-vermilion {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2.2rem;
  border: 1px solid var(--vermilion-red);
  color: var(--vermilion-red);
  background-color: transparent;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  font-family: var(--font-serif-cn);
  transition: all 0.3s ease;
  min-height: 46px;
}

.btn-outline-vermilion:hover {
  background-color: var(--vermilion-red);
  color: #F4EFE4;
}

/* Hairline Separators */
.hairline-divider {
  width: 100%;
  height: 1px;
  background-color: var(--hairline);
  margin: 0;
  border: none;
}

/* Sections */
section {
  padding: 5.5rem 0;
  position: relative;
}

.section-tag {
  font-family: var(--font-latin);
  font-size: 1.1rem;
  color: var(--stone-gray);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  display: block;
}

.section-heading-wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 1.5rem;
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--ink-black);
}

.section-title span.kanji {
  font-size: 2.4rem;
  font-weight: 700;
  margin-right: 0.5rem;
}

.section-footnote {
  font-size: 0.88rem;
  color: var(--stone-gray);
  letter-spacing: 0.08em;
}

/* Hero Section */
.hero-section {
  padding: 6.5rem 0 5.5rem 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  max-width: 780px;
}

.hero-pretitle {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1.5rem;
}

.hero-seal {
  width: 26px;
  height: 26px;
  font-size: 10px;
}

.hero-tagline-latin {
  font-family: var(--font-latin);
  font-size: 1.25rem;
  font-style: italic;
  letter-spacing: 0.15em;
  color: var(--stone-gray);
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.25;
  margin-bottom: 1.6rem;
  color: var(--ink-black);
}

.hero-title strong {
  font-weight: 900;
  color: var(--ink-black);
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--stone-gray);
  margin-bottom: 1.8rem;
  letter-spacing: 0.08em;
  line-height: 1.7;
}

.hero-intro {
  font-size: 1.02rem;
  color: #4A453E;
  margin-bottom: 2.8rem;
  max-width: 680px;
  line-height: 1.95;
  border-left: 2px solid var(--hairline);
  padding-left: 1.5rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.hero-aside {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.hero-visual {
  width: 220px;
  height: 220px;
  opacity: 0.9;
}

/* Service List (Zen 3 items: 藏 Vault / 传 Stream / 志 Log) */
.service-list {
  display: flex;
  flex-direction: column;
}

.service-row {
  display: grid;
  grid-template-columns: 80px 220px 1fr 180px;
  align-items: center;
  padding: 2.8rem 0;
  border-bottom: 1px solid var(--hairline);
  transition: background-color 0.3s ease;
}

.service-row:first-child {
  border-top: 1px solid var(--hairline);
}

.service-row:hover {
  background-color: rgba(33, 30, 25, 0.015);
}

.service-symbol {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--ink-black);
  line-height: 1;
}

.service-meta h3 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.service-meta .latin-label {
  font-family: var(--font-latin);
  font-size: 0.95rem;
  color: var(--stone-gray);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.service-desc {
  font-size: 0.98rem;
  color: #555047;
  padding: 0 1.5rem;
  line-height: 1.8;
}

.service-stat {
  text-align: right;
  font-family: var(--font-latin);
  font-size: 1.5rem;
  color: var(--ink-black);
  font-weight: 600;
}

.service-stat small {
  display: block;
  font-size: 0.8rem;
  color: var(--stone-gray);
  font-family: var(--font-serif-cn);
  letter-spacing: 0.05em;
}

/* Streaming & AI Matrix Section */
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.matrix-column {
  border-top: 1px solid var(--hairline);
  padding-top: 2rem;
}

.matrix-column-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.matrix-column-head h3 {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.matrix-column-head .latin-sub {
  font-family: var(--font-latin);
  font-size: 1rem;
  color: var(--stone-gray);
  letter-spacing: 0.15em;
}

.matrix-items {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.matrix-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 0.95rem;
}

.matrix-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.matrix-badge {
  font-size: 0.78rem;
  color: var(--stone-gray);
  font-family: var(--font-latin);
  letter-spacing: 0.08em;
}

.matrix-status {
  font-size: 0.85rem;
  color: var(--stone-gray);
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--vermilion-red);
  display: inline-block;
}

/* Pricing Section */
.pricing-section {
  background-color: var(--bg-rice-paper);
}

.pricing-table-wrap {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  overflow-x: auto;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.pricing-table th, .pricing-table td {
  padding: 1.6rem 1.2rem;
  border-bottom: 1px solid var(--hairline);
  font-size: 0.95rem;
}

.pricing-table th {
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink-black);
  background-color: rgba(33, 30, 25, 0.02);
}

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

.plan-name {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.plan-badge-seal {
  display: inline-block;
  font-size: 0.72rem;
  border: 1px solid var(--vermilion-red);
  color: var(--vermilion-red);
  padding: 1px 6px;
  margin-left: 8px;
  vertical-align: middle;
}

.plan-price {
  font-family: var(--font-latin);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ink-black);
}

.plan-period {
  font-size: 0.85rem;
  color: var(--stone-gray);
  font-family: var(--font-serif-cn);
  font-weight: normal;
}

.pricing-cards-mobile {
  display: none;
}

/* Testimonials / Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.review-item {
  border-left: 1px solid var(--hairline);
  padding: 1.2rem 0 1.2rem 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-text {
  font-size: 0.96rem;
  line-height: 1.85;
  color: #3C3831;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--stone-gray);
}

.review-author-name {
  font-weight: 600;
  color: var(--ink-black);
}

.review-rating-stars {
  color: var(--vermilion-red);
  letter-spacing: 0.1em;
}

/* FAQ Section */
.faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--hairline);
}

.faq-item {
  border-bottom: 1px solid var(--hairline);
  padding: 1.8rem 0;
}

.faq-item details summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--ink-black);
  user-select: none;
}

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

.faq-toggle-icon {
  font-family: var(--font-latin);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--stone-gray);
  transition: transform 0.3s ease;
}

.faq-item details[open] .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--vermilion-red);
}

.faq-answer {
  padding-top: 1.2rem;
  font-size: 0.96rem;
  color: #555047;
  line-height: 1.9;
  max-width: 900px;
}

/* CTA Bottom Banner */
.zen-banner-section {
  padding: 5rem 0;
  text-align: center;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background-color: var(--bg-rice-paper-soft);
}

.zen-banner-content {
  max-width: 640px;
  margin: 0 auto;
}

.zen-banner-title {
  font-size: 2.2rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.zen-banner-desc {
  font-size: 1.05rem;
  color: var(--stone-gray);
  margin-bottom: 2.5rem;
  letter-spacing: 0.08em;
}

/* Quiet Zen Footer */
footer.site-footer {
  padding: 4.5rem 0 3.5rem 0;
  background-color: var(--bg-rice-paper);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
  text-align: center;
}

/* Strictly the 4 requested titles */
.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.8rem;
  list-style: none;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--hairline);
  width: 100%;
  max-width: 680px;
}

.footer-nav-link {
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: var(--ink-black);
  position: relative;
  transition: color 0.3s ease;
}

.footer-nav-link:hover {
  color: var(--vermilion-red);
}

/* Haiku-like sign-off */
.footer-haiku {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-family: var(--font-serif-cn);
  font-size: 0.92rem;
  color: var(--stone-gray);
  letter-spacing: 0.25em;
  font-style: normal;
  user-select: none;
}

.footer-haiku .latin-quote {
  font-family: var(--font-latin);
  font-size: 1.15rem;
  font-style: italic;
  letter-spacing: 0.15em;
  color: #555047;
  margin-bottom: 0.4rem;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--stone-gray);
  letter-spacing: 0.08em;
}

/* Articles / Insights Page Styles */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  margin-top: 2rem;
}

.article-card {
  border-top: 1px solid var(--hairline);
  padding-top: 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-meta-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
  font-size: 0.82rem;
  color: var(--stone-gray);
  letter-spacing: 0.1em;
}

.article-title {
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
  color: var(--ink-black);
}

.article-title:hover {
  color: var(--vermilion-red);
}

.article-excerpt {
  font-size: 0.92rem;
  color: #555047;
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.article-readmore {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--ink-black);
  border-bottom: 1px solid var(--ink-black);
  align-self: flex-start;
  padding-bottom: 2px;
}

.article-readmore:hover {
  color: var(--vermilion-red);
  border-color: var(--vermilion-red);
}

/* Article detail reading layout */
.article-full-content {
  max-width: 820px;
  margin: 0 auto;
  padding: 3rem 0;
  font-size: 1.02rem;
  line-height: 2;
  color: #302C26;
}

.article-full-content h2 {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin: 2.5rem 0 1rem 0;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 0.5rem;
}

.article-full-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.8rem 0 0.8rem 0;
}

.article-full-content p {
  margin-bottom: 1.4rem;
}

.article-full-content ul, .article-full-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.8rem;
}

.article-full-content li {
  margin-bottom: 0.5rem;
}

.article-full-content a {
  color: var(--ink-black);
  border-bottom: 1px solid var(--vermilion-red);
  padding-bottom: 1px;
  font-weight: 600;
}

.article-full-content a:hover {
  color: var(--vermilion-red);
}

/* Standalone Info Pages (About, Terms, Privacy, Sitemap) */
.page-hero {
  padding: 4.5rem 0 2.5rem 0;
  border-bottom: 1px solid var(--hairline);
}

.page-title {
  font-size: 2.4rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: 0.8rem;
}

.page-subtitle {
  font-size: 1rem;
  color: var(--stone-gray);
  letter-spacing: 0.08em;
}

.doc-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 4rem 0;
  line-height: 2;
}

.doc-section {
  margin-bottom: 3.5rem;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 2.5rem;
}

.doc-section:last-child {
  border-bottom: none;
}

.doc-section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 1.2rem;
  color: var(--ink-black);
}

.doc-section p {
  margin-bottom: 1.2rem;
  color: #4A453E;
  font-size: 0.98rem;
}

.doc-section ul {
  padding-left: 1.6rem;
  margin-bottom: 1.2rem;
  color: #4A453E;
}

.doc-section li {
  margin-bottom: 0.6rem;
}

/* ==========================================================================
   Responsive Adaptations (@media)
   Single-column on mobile, finger-friendly targets (min 44px)
   ========================================================================== */
@media screen and (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .hero-aside {
    display: none; /* Hide large decorative side art on tablets */
  }

  .service-row {
    grid-template-columns: 60px 1fr 140px;
    row-gap: 0.8rem;
  }

  .service-desc {
    grid-column: 1 / -1;
    padding: 0.5rem 0 0 0;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .matrix-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media screen and (max-width: 640px) {
  header.site-header {
    padding: 1rem 0;
  }

  .nav-menu {
    gap: 1.2rem;
  }

  .nav-link {
    font-size: 0.85rem;
  }

  .nav-cta {
    padding: 0.4rem 0.8rem;
    font-size: 0.82rem;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-intro {
    font-size: 0.92rem;
    padding-left: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .hero-actions a {
    text-align: center;
    width: 100%;
  }

  .service-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem 0;
  }

  .service-stat {
    text-align: left;
    margin-top: 0.8rem;
  }

  .pricing-table-wrap {
    display: none;
  }

  .pricing-cards-mobile {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .pricing-card-mobile {
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    padding: 1.8rem 0;
  }

  .pricing-card-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 1rem;
  }

  .pricing-card-features {
    list-style: none;
    margin: 1.2rem 0 1.8rem 0;
  }

  .pricing-card-features li {
    font-size: 0.9rem;
    color: #555047;
    padding: 0.4rem 0;
    border-bottom: 1px dashed var(--hairline);
  }

  .footer-nav {
    flex-wrap: wrap;
    gap: 1.2rem 1.8rem;
  }
}