/* ==========================================================================
   良心云 (liangxin-yun.mom) — 草本工坊与匠心臻选品质风
   Botanical Apothecary & Artisanal Craft Seal Stylesheet
   Palette:
   - Organic Linen Cream: #FBF9F5
   - Warm Parchment Card: #F3EFE6
   - Deep Parchment Border: #DFD7C6
   - Deep Botanical Charcoal: #1D2A22
   - Muted Sage Text: #4B5B51
   - Herbal Olive-Emerald: #2E6F40
   - Artisanal Copper-Terracotta: #B85D3B
   ========================================================================== */

:root {
  --bg-linen: #FBF9F5;
  --bg-parchment: #F3EFE6;
  --bg-card-inner: #FAF7F0;
  --border-craft: #D9D0BE;
  --border-accent: #C7B99E;
  --text-charcoal: #1D2A22;
  --text-sage: #49594F;
  --text-muted: #6C7A70;
  --herb-emerald: #2E6F40;
  --herb-emerald-dark: #21522E;
  --copper-seal: #B85D3B;
  --copper-seal-dark: #964628;
  --gold-wax: #C89B53;
  --shadow-craft: 0 6px 22px rgba(29, 42, 34, 0.06);
  --radius-sm: 6px;
  --radius-md: 10px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "PingFang SC", "Microsoft YaHei", serif;
  background-color: var(--bg-linen);
  color: var(--text-charcoal);
  line-height: 1.78;
  background-image: radial-gradient(rgba(184, 93, 59, 0.04) 1px, transparent 1px),
                    radial-gradient(rgba(46, 111, 64, 0.03) 1px, var(--bg-linen) 1px);
  background-size: 32px 32px;
  background-position: 0 0, 16px 16px;
  -webkit-font-smoothing: antialiased;
}

/* Sans-serif utility for UI badges, tables, numbers */
.font-sans {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Global Link Rules: Prominent Copper-Terracotta, consistent before and after visited */
a,
a:visited {
  color: var(--copper-seal);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1.5px;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--herb-emerald);
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header & Navigation (Desktop + Mobile Visible Wrap)
   ========================================================================== */
.site-header {
  background-color: rgba(251, 249, 245, 0.96);
  border-bottom: 2px double var(--border-craft);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(6px);
}

.header-topbar {
  background-color: var(--text-charcoal);
  color: #EAE4D7;
  font-size: 0.78rem;
  padding: 6px 0;
  text-align: center;
  letter-spacing: 0.06em;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.header-topbar span {
  color: var(--gold-wax);
  font-weight: 600;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 20px;
  flex-wrap: wrap;
}

.brand-logo,
.brand-logo:visited {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-charcoal);
}

.brand-logo:hover {
  color: var(--herb-emerald);
}

.brand-logo svg {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.38rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-charcoal);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

.main-nav a,
.main-nav a:visited {
  text-decoration: none;
  color: var(--text-charcoal);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.94rem;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--herb-emerald);
  background-color: var(--bg-parchment);
  border-color: var(--border-craft);
}

.main-nav a.nav-atelier,
.main-nav a.nav-atelier:visited {
  background-color: var(--herb-emerald);
  color: #FFFFFF;
  border-color: var(--herb-emerald);
  font-weight: 600;
}

.main-nav a.nav-atelier:hover {
  background-color: var(--herb-emerald-dark);
  color: #FFFFFF;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 58px 0 64px;
  border-bottom: 1px solid var(--border-craft);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 44px;
  align-items: center;
}

.craft-ribbon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-parchment);
  border: 1px solid var(--border-accent);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--herb-emerald);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}

.craft-ribbon-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--copper-seal);
  display: inline-block;
}

.hero-content h1 {
  font-size: 2.55rem;
  line-height: 1.28;
  color: var(--text-charcoal);
  margin-bottom: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-content h1 .highlight-seal {
  color: var(--copper-seal);
  border-bottom: 2px solid rgba(184, 93, 59, 0.35);
}

.hero-lead {
  font-size: 1.08rem;
  color: var(--text-sage);
  margin-bottom: 26px;
  line-height: 1.85;
}

.hero-pledge-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  background-color: var(--bg-parchment);
  border: 1px solid var(--border-craft);
  border-left: 4px solid var(--herb-emerald);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 28px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.pledge-item strong {
  display: block;
  font-size: 1.05rem;
  color: var(--text-charcoal);
}

.pledge-item span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.btn-primary,
.btn-primary:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--copper-seal);
  color: #FFFFFF;
  text-decoration: none;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 600;
  font-size: 1.02rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--copper-seal-dark);
  box-shadow: 0 4px 14px rgba(184, 93, 59, 0.25);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.btn-primary:hover {
  background-color: var(--copper-seal-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-secondary,
.btn-secondary:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--bg-parchment);
  color: var(--herb-emerald);
  text-decoration: none;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 600;
  font-size: 1.02rem;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--herb-emerald);
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.btn-secondary:hover {
  background-color: var(--herb-emerald);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.hero-visual-frame {
  background-color: var(--bg-parchment);
  border: 2px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-craft);
  position: relative;
}

.hero-visual-frame::before {
  content: "CERTIFIED IEPL · ARTISAN SEAL NO. 2026-08";
  display: block;
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  border-bottom: 1px dashed var(--border-accent);
  padding-bottom: 10px;
  margin-bottom: 12px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.hero-anim-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Section Scaffolding & Certificate Cards
   ========================================================================== */
.section-block {
  padding: 68px 0;
  border-bottom: 1px solid var(--border-craft);
}

.section-block.alt-bg {
  background-color: rgba(243, 239, 230, 0.55);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 46px;
}

.section-kicker {
  display: inline-block;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--copper-seal);
  margin-bottom: 8px;
}

.section-header h2 {
  font-size: 2rem;
  color: var(--text-charcoal);
  margin-bottom: 12px;
  font-weight: 700;
}

.section-header p {
  color: var(--text-sage);
  font-size: 1rem;
}

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.craft-card {
  background-color: var(--bg-card-inner);
  border: 1px solid var(--border-craft);
  border-top: 3px solid var(--herb-emerald);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-craft);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.craft-card.copper-top {
  border-top-color: var(--copper-seal);
}

.card-stamp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.card-icon-badge {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-parchment);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-icon-badge svg {
  width: 30px;
  height: 30px;
}

.card-serial {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--copper-seal);
  background-color: rgba(184, 93, 59, 0.09);
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.06em;
}

.craft-card h3 {
  font-size: 1.26rem;
  color: var(--text-charcoal);
  margin-bottom: 12px;
  font-weight: 700;
}

.craft-card p {
  color: var(--text-sage);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.card-ledger-meta {
  border-top: 1px dashed var(--border-craft);
  padding-top: 12px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.82rem;
  color: var(--herb-emerald);
  font-weight: 600;
}

/* ==========================================================================
   Pricing Section (Certificate Ledger Style)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card-inner);
  border: 1.5px solid var(--border-craft);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  box-shadow: var(--shadow-craft);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--copper-seal);
  background-color: #FFFDF9;
  transform: translateY(-4px);
}

.pricing-seal-ribbon {
  position: absolute;
  top: -13px;
  right: 22px;
  background-color: var(--copper-seal);
  color: #FFFFFF;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 4px;
  letter-spacing: 0.06em;
}

.pricing-tier-name {
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--text-charcoal);
  margin-bottom: 6px;
}

.pricing-tier-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.pricing-amount-box {
  background-color: var(--bg-parchment);
  border: 1px solid var(--border-craft);
  padding: 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--copper-seal);
}

.price-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-charcoal);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1;
}

.price-cycle {
  font-size: 0.86rem;
  color: var(--text-muted);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.pricing-spec-list {
  list-style: none;
  margin-bottom: 26px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.pricing-spec-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border-craft);
  font-size: 0.92rem;
  color: var(--text-sage);
}

.pricing-spec-list li svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
}

.btn-block {
  width: 100%;
  text-align: center;
}

/* ==========================================================================
   FAQ & Testimonials
   ========================================================================== */
.faq-ledger-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background-color: var(--bg-card-inner);
  border: 1px solid var(--border-craft);
  border-left: 4px solid var(--copper-seal);
  border-radius: var(--radius-sm);
  padding: 22px 26px;
  box-shadow: var(--shadow-craft);
}

.faq-item h3 {
  font-size: 1.15rem;
  color: var(--text-charcoal);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-q-badge {
  background-color: var(--herb-emerald);
  color: #FFFFFF;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 3px;
  flex-shrink: 0;
}

.faq-item p {
  color: var(--text-sage);
  font-size: 0.95rem;
}

.testimonial-card {
  background-color: var(--bg-card-inner);
  border: 1px solid var(--border-craft);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  box-shadow: var(--shadow-craft);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-quote {
  font-size: 0.96rem;
  color: var(--text-sage);
  font-style: italic;
  margin-bottom: 20px;
  line-height: 1.8;
}

.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-craft);
  padding-top: 14px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.author-info strong {
  display: block;
  font-size: 0.92rem;
  color: var(--text-charcoal);
}

.author-info span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.author-seal {
  font-size: 0.75rem;
  color: var(--herb-emerald);
  border: 1px solid var(--herb-emerald);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

/* ==========================================================================
   Article & Hub Layouts
   ========================================================================== */
.page-banner {
  background-color: var(--bg-parchment);
  border-bottom: 1px solid var(--border-craft);
  padding: 46px 0;
  text-align: center;
}

.page-banner h1 {
  font-size: 2.2rem;
  color: var(--text-charcoal);
  margin-bottom: 12px;
}

.page-banner p {
  max-width: 720px;
  margin: 0 auto;
  color: var(--text-sage);
  font-size: 1.02rem;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  padding: 56px 0;
}

.article-card {
  background-color: var(--bg-card-inner);
  border: 1px solid var(--border-craft);
  border-top: 3px solid var(--copper-seal);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-craft);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-tag {
  background-color: var(--bg-parchment);
  color: var(--herb-emerald);
  border: 1px solid var(--border-accent);
  padding: 2px 10px;
  border-radius: 4px;
  font-weight: 600;
}

.article-card h2 {
  font-size: 1.32rem;
  line-height: 1.42;
  margin-bottom: 12px;
}

.article-card h2 a,
.article-card h2 a:visited {
  color: var(--text-charcoal);
  text-decoration: none;
}

.article-card h2 a:hover {
  color: var(--copper-seal);
}

.article-card p {
  color: var(--text-sage);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.article-readmore,
.article-readmore:visited {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--copper-seal);
  text-decoration: underline;
}

/* Single Article Content */
.article-wrapper {
  max-width: 840px;
  margin: 48px auto 64px;
  background-color: var(--bg-card-inner);
  border: 1px solid var(--border-craft);
  border-radius: var(--radius-md);
  padding: 44px 48px;
  box-shadow: var(--shadow-craft);
}

.article-header {
  border-bottom: 2px double var(--border-craft);
  padding-bottom: 24px;
  margin-bottom: 30px;
}

.article-breadcrumb {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.article-header h1 {
  font-size: 1.95rem;
  line-height: 1.38;
  color: var(--text-charcoal);
  margin-bottom: 14px;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.article-body h2 {
  font-size: 1.42rem;
  color: var(--text-charcoal);
  margin: 32px 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--herb-emerald);
  line-height: 1.35;
}

.article-body h3 {
  font-size: 1.16rem;
  color: var(--copper-seal-dark);
  margin: 22px 0 10px;
  line-height: 1.4;
}

.article-body p {
  font-size: 1.02rem;
  color: var(--text-charcoal);
  margin-bottom: 18px;
  line-height: 1.88;
  text-align: justify;
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px 24px;
  color: var(--text-charcoal);
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-cta-box {
  background-color: var(--bg-parchment);
  border: 1.5px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 34px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.article-cta-box h3 {
  margin: 0 0 6px;
  color: var(--text-charcoal);
}

.article-cta-box p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-sage);
}

.related-section {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 2px double var(--border-craft);
}

.related-section h2 {
  font-size: 1.3rem;
  margin-bottom: 18px;
  color: var(--text-charcoal);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.related-item {
  background-color: var(--bg-parchment);
  border: 1px solid var(--border-craft);
  padding: 16px;
  border-radius: var(--radius-sm);
}

.related-item a,
.related-item a:visited {
  font-weight: 600;
  color: var(--copper-seal);
  font-size: 0.96rem;
}

/* ==========================================================================
   Footer (Strictly Chinese Only & 4 Required Links)
   ========================================================================== */
.site-footer {
  background-color: var(--bg-parchment);
  border-top: 2px double var(--border-craft);
  padding: 36px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 28px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.footer-links a,
.footer-links a:visited {
  color: var(--copper-seal);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--herb-emerald);
  text-decoration: underline;
}

.footer-copy {
  font-size: 0.84rem;
  color: var(--text-muted);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ==========================================================================
   Responsive Design (Mobile Navigation MUST remain visible!)
   ========================================================================== */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .cards-grid-3,
  .pricing-grid,
  .hub-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  /* Strictly keep navigation menu visible and wrapped cleanly on mobile */
  .main-nav {
    display: flex !important;
    width: 100%;
    flex-wrap: wrap;
    gap: 8px;
  }
  .main-nav a,
  .main-nav a:visited {
    font-size: 0.86rem;
    padding: 6px 11px;
    background-color: var(--bg-parchment);
    border: 1px solid var(--border-craft);
  }
  .hero-content h1 {
    font-size: 1.9rem;
  }
  .hero-pledge-bar {
    grid-template-columns: 1fr;
  }
  .article-wrapper {
    padding: 26px 20px;
    margin: 24px auto 40px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}