/* ===== Design Tokens ===== */
:root {
  --bg: #faf9f6;
  --bg-warm: #f4f1ec;
  --bg-dark: #1a1a1a;
  --text: #1a1a1a;
  --text-muted: #646464;    /* 原 #6b6b6b：加深一档，浅底下 ≥5:1 */
  --text-light: #6d6960;    /* 原 #757066：加深一档，浅底下 ≥5:1 */
  --accent: #a03030;
  --accent-dark: #7a2020;
  --accent-light: #d98b8b;   /* 深色底上的品牌红提亮档（保证 4.5:1 对比度） */
  --line: rgba(26, 26, 26, 0.12);
  --line-dark: rgba(255, 255, 255, 0.16);   /* 深色底上的分隔细线 */
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.05);
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Cormorant Garamond', 'Noto Serif SC', Georgia, serif;
  --container: 1280px;

  /* 圆角：统一两档 —— 卡片用 --radius，按钮/控件用 --radius-sm */
  --radius: 2px;
  --radius-sm: 2px;

  /* 字号阶梯：收敛为 8 档，同一层级只用一个值 */
  --fs-caption: 0.72rem;
  --fs-small: 0.8rem;
  --fs-meta: 0.85rem;
  --fs-body: 0.95rem;
  --fs-lead: 1.05rem;
  --fs-h3: 1.25rem;
  --fs-h2: 1.6rem;

  /* 字距：收敛为 4 档 —— 正文 / 小标 / 眉标 / 展示 */
  --ls-body: 0.02em;
  --ls-sub: 0.05em;
  --ls-eyebrow: 0.15em;
  --ls-display: 0.04em;
  --ls-none: 0;
}

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

html {
  scroll-behavior: smooth;
}

/* 锚点跳转预留固定导航高度，避免区块标题被 header 遮住 */
[id] {
  scroll-margin-top: 90px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  letter-spacing: var(--ls-body);
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(92%, var(--container));
  margin-inline: auto;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-img {
  height: 32px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: var(--fs-caption);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-eyebrow);
}

.main-nav a {
  position: relative;
  white-space: nowrap;
  opacity: 0.75;
  transition: opacity 0.2s;
}

.main-nav a:hover,
.main-nav a:focus {
  opacity: 1;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s;
}

.main-nav a:hover::after,
.main-nav a:focus::after {
  width: 100%;
}

.nav-shop {
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--text);
  transition: background 0.2s, color 0.2s;
}

.nav-shop:hover {
  background: var(--text);
  color: var(--bg);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-toggle {
  background: transparent;
  border: none;
  font-family: var(--font-sans);
  font-size: var(--fs-meta);
  font-weight: 600;
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.lang-toggle:hover {
  opacity: 1;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  height: 100svh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.78);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.55));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  max-width: 880px;
  padding: 0 1.5rem;
}

.hero-label {
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  opacity: 0.85;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 400;
  line-height: 1;
  margin-bottom: 1.25rem;
  letter-spacing: var(--ls-display);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 300;
  letter-spacing: var(--ls-eyebrow);
  margin-bottom: 2.5rem;
  opacity: 0.92;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 2rem;
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.8);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-hint span {
  display: block;
  width: 1px;
  height: 48px;
  background: rgba(255,255,255,0.4);
  animation: scrollPulse 1.6s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.7); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== Sections ===== */
.section {
  padding: 8rem 0;
}

.section-header {
  max-width: 680px;
  margin: 0 auto 4rem;
  text-align: center;
}

.section-eyebrow {
  color: var(--accent);
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 400;
  line-height: 1.25;
  margin-bottom: 1.25rem;
  letter-spacing: var(--ls-display);
}

.section-lead {
  color: var(--text-muted);
  font-size: var(--fs-lead);
  line-height: 1.85;
}

.section-body {
  color: var(--text-muted);
  font-size: var(--fs-body);
  line-height: 2;
  margin-bottom: 1.5rem;
}

.section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.section-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.brand-quote {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-style: italic;
  color: var(--accent);
  margin-top: 2rem;
  padding-left: 1.5rem;
  border-left: 2px solid var(--accent);
}

/* ===== Founder ===== */
.section-founder {
  background: #fff;
}

.founder-grid {
  align-items: stretch;
}

.founder-media {
  position: relative;
  overflow: hidden;
  background: var(--bg-warm);
}

.founder-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-height: 720px;
}

/* ===== Grading ===== */
.section-grading {
  background: var(--bg-warm);
}

.grading-visual {
  max-width: 900px;
  margin: 0 auto 4rem;
}

.grading-visual img {
  width: 100%;
  height: auto;
}

.grading-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.grade-card {
  background: var(--bg);
  padding: 2rem 1.5rem;
  border-top: 2px solid var(--line);
  transition: box-shadow 0.3s, transform 0.3s;
}

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

.grade-featured {
  border-top-color: var(--accent);
}

.grade-mark {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: var(--fs-lead);
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.grade-card h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.grade-card p {
  font-size: var(--fs-body);
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.grade-price {
  font-size: var(--fs-meta);
  font-weight: 600;
  letter-spacing: var(--ls-sub);
}

/* ===== Ritual ===== */
.ritual-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-auto-rows: minmax(280px, auto);
  gap: 1.25rem;
}

.ritual-card {
  position: relative;
  overflow: hidden;
}

.ritual-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.ritual-card:hover img {
  transform: scale(1.03);
}

.ritual-large {
  grid-row: span 2;
}

.ritual-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  background: linear-gradient(to top, rgba(0,0,0,0.65), transparent);
  color: #fff;
}

.ritual-caption h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  margin-bottom: 0.25rem;
}

.ritual-caption p {
  font-size: var(--fs-meta);
  opacity: 0.85;
}

/* ===== Shop ===== */
.section-shop {
  background: var(--bg-dark);
  color: #fff;
}

.shop-grid .section-title,
.shop-grid .section-body {
  color: #fff;
}

.shop-grid .section-body {
  opacity: 0.75;
}

.shop-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.shop-qr img {
  width: 180px;
  aspect-ratio: 720 / 960;
  height: auto;
  object-fit: contain;
  border: 1px solid var(--line);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04);
}

.shop-qr p {
  font-size: var(--fs-small);
  letter-spacing: var(--ls-eyebrow);
  opacity: 0.7;
}

/* ===== Releases ===== */
.section-releases {
  background: var(--bg-warm);
}

.releases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.release-card {
  display: block;
  background: var(--bg);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.3s;
  color: inherit;
  text-decoration: none;
}

.release-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.release-thumb {
  aspect-ratio: 16 / 10;
  background: var(--bg-warm);
  overflow: hidden;
}

.release-thumb img,
.release-thumb iframe {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: none;
}

.release-body {
  padding: 1.5rem;
}

.release-date {
  font-size: var(--fs-caption);
  color: var(--text-light);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.release-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.release-excerpt {
  font-size: var(--fs-body);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.release-link {
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  border-bottom: 1px solid var(--text);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}

.release-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.release-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.5rem;
}

.release-cta {
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  border-bottom: 1px solid var(--text);
  padding-bottom: 2px;
  color: var(--text);
}

.release-card:hover .release-cta {
  color: var(--accent);
  border-color: var(--accent);
}

.release-timeline {
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-sub);
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 1px dashed var(--text-light);
  padding-bottom: 1px;
}

.release-timeline:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.releases-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 0;
}

/* ===== Contact ===== */
.contact-grid .section-title {
  margin-bottom: 1.5rem;
}

.contact-list {
  list-style: none;
  margin: 2rem 0;
}

.contact-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-body);
}

.contact-list span {
  color: var(--text-muted);
  margin-right: 0.5rem;
}

.contact-note {
  font-size: var(--fs-small);
  color: var(--text-light);
}

/* 联系区转化按钮 */
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-sub);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

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

.contact-btn-primary {
  background: var(--accent);
  color: #fff;
}

.contact-btn-primary:hover {
  background: transparent;
  color: var(--accent);
}

.contact-btn:not(.contact-btn-primary):hover {
  background: var(--accent);
  color: #fff;
}

.contact-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.contact-qr img {
  width: 180px;
  aspect-ratio: 720 / 960;
  height: auto;
  object-fit: contain;
  border: 1px solid var(--line);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04);
}

.contact-qr p {
  font-size: var(--fs-small);
  color: var(--text-muted);
  letter-spacing: var(--ls-eyebrow);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: #fff;
  padding: 4rem 0 3rem;
  text-align: center;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.footer-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.footer-qr img {
  width: 96px;
  height: 96px;
  object-fit: cover;
  background: #fff;
  padding: 6px;
  border-radius: var(--radius);
}

.footer-qr span {
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-eyebrow);
  opacity: 0.9;
  text-transform: uppercase;
}

.footer-logo {
  height: 28px;
  width: auto;
  margin: 0 auto 1.5rem;
  filter: brightness(0) invert(1);
}

.footer-copy {
  font-size: var(--fs-small);
  opacity: 0.8;
  margin-bottom: 0.5rem;
}

.footer-credit {
  font-size: var(--fs-caption);
  opacity: 0.68;
  letter-spacing: var(--ls-eyebrow);
}

.footer-icp {
  /* 用户要求：两个备案号字号再缩小一半。
     注：中文环境浏览器强制最小 12px 字号，font-size 减半会被钳制不生效，
     故用 transform 等比缩放实现，全浏览器视觉一致 */
  font-size: var(--fs-caption);
  opacity: 0.62;
  letter-spacing: var(--ls-eyebrow);
  margin-top: 0.75rem;
  line-height: 1.9;
  transform: scale(0.5);
  transform-origin: 50% 0;
  margin-bottom: -1.6rem;
}

.footer-gongan {
  /* 用户要求：去掉公安备案徽标图标（太突兀），只保留文字链接 */
  display: inline;
}

.footer-icp a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: opacity 0.3s ease, border-color 0.3s ease;
}

.footer-icp a:hover {
  opacity: 0.85;
  border-bottom-color: currentColor;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grading-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .ritual-grid {
    grid-template-columns: 1fr 1fr;
  }

  .ritual-large {
    grid-row: span 2;
  }

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

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    /* 注意：header 的 backdrop-filter 会让内部 fixed 相对 header 定位，
       bottom:0 会塌陷导致菜单不可见；改用视口高度撑满 */
    height: calc(100vh - 76px);
    height: calc(100dvh - 76px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    flex-direction: column;
    align-items: flex-start;
    /* 半透明白色底：挡住底下页面大字，导航文字清晰可读。
       注意 header 自身的 backdrop-filter 会形成 backdrop root，
       菜单的 blur 采样不到页面内容，所以透明度必须足够高（≥0.95） */
    background: rgba(255, 255, 255, 0.97);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 32px rgba(26, 26, 26, 0.10);
    padding: 2rem;
    gap: 1.5rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  /* 磨砂底上的链接加深，保证 4.5:1 以上对比度 */
  .main-nav.open a {
    color: var(--text);
    opacity: 0.85;
  }

  .main-nav.open a:hover,
  .main-nav.open a:focus {
    opacity: 1;
  }

  .main-nav.open .nav-shop {
    border-color: var(--text);
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav a {
    font-size: var(--fs-body);
  }

  .menu-toggle {
    display: flex;
  }

  .section-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .grading-cards,
  .ritual-grid,
  .releases-grid {
    grid-template-columns: 1fr;
  }

  .ritual-large {
    grid-row: span 1;
  }

  .section {
    padding: 4.5rem 0;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }
}

/* ============================================
   新增：terroir / kungfu / craft / faq
   —— 全部沿用 Design Tokens（设计系统已统一）
   ============================================ */

/* ----- 核心产区 ----- */
.section-terroir {
  background: var(--bg);
}

.terroir-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}

.terroir-card {
  background: var(--bg-warm);
  border-top: 1px solid var(--line);
  padding: 2rem 1.5rem;
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-top-color 0.3s ease;
}

.terroir-card:hover {
  border-top-color: var(--accent);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.terroir-card h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 400;
  margin-bottom: 0.75rem;
  letter-spacing: var(--ls-display);
  color: var(--text);
}

.terroir-card p {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--text-muted);
}

/* 坪坑头 = 鸭屎香原生山场之一，保持中性，不做反白强调，与原设计系统一致 */
.terroir-featured {
  background: var(--bg-warm);
  border-top-color: var(--accent);
}

@media (max-width: 1000px) {
  .terroir-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 700px) {
  .terroir-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .terroir-grid { grid-template-columns: 1fr; }
}

/* ----- 工夫茶 21 式 ----- */
.section-kungfu {
  background: var(--bg-warm);
}

.kungfu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 3rem;
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.kungfu-grid li {
  font-family: var(--font-sans);
  background: var(--bg);
  padding: 1.6rem 1.4rem;
  font-size: var(--fs-body);
  letter-spacing: var(--ls-body);
  color: var(--text);
  transition: background 0.25s ease, color 0.25s ease;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.kungfu-grid li:hover {
  background: var(--bg-dark);
  color: #fff;
}

.kungfu-grid li:hover .kungfu-desc {
  color: rgba(255, 255, 255, 0.7);
}

.kungfu-step {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--fs-lead);
  font-weight: 400;
  letter-spacing: var(--ls-display);
  margin-bottom: 0.6rem;
}

.kungfu-step::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  margin-right: 0.6rem;
  vertical-align: middle;
}

.kungfu-grid li:hover .kungfu-step::before {
  background: #fff;
}

.kungfu-desc {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--fs-meta);
  line-height: 1.75;
  letter-spacing: var(--ls-body);
  color: var(--text-muted);
  transition: color 0.25s ease;
}

@media (max-width: 900px) {
  .kungfu-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 540px) {
  .kungfu-grid { grid-template-columns: 1fr; }
}

/* ----- 茶礼 / 定制 / 供应链 ----- */
.section-craft {
  background: var(--bg);
}

.craft-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.craft-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-top: 2px solid var(--accent);
  padding: 2.2rem 1.8rem;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

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

.craft-card h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: 400;
  margin-bottom: 0.85rem;
  letter-spacing: var(--ls-display);
  color: var(--text);
}

.craft-card p {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--text-muted);
  flex: 1;
}

/* 商业转化 CTA */
.craft-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-sans);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-sub);
  color: var(--accent);
  text-decoration: none;
  transition: gap 0.25s ease, color 0.25s ease;
}

.craft-cta:hover {
  gap: 0.75rem;
  color: var(--accent);
}

@media (max-width: 900px) {
  .craft-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .craft-grid { grid-template-columns: 1fr; }
}

/* ----- FAQ ----- */
.section-faq {
  background: var(--bg-warm);
}

.faq-list {
  max-width: 820px;
  margin: 3rem auto 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.faq-list details {
  background: transparent;
  border-bottom: 1px solid var(--line);
  padding: 1.6rem 0.5rem;
  transition: background 0.25s ease;
}

.faq-list details[open] {
  background: transparent;
}

.faq-list summary {
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 400;
  letter-spacing: var(--ls-display);
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  position: relative;
  padding-right: 36px;
  transition: color 0.2s ease;
}

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

.faq-list summary::after {
  content: '+';
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-sans);
  font-size: var(--fs-h2);
  font-weight: 300;
  color: var(--accent);
  transition: transform 0.25s ease;
}

.faq-list details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-list summary:hover {
  color: var(--accent);
}

.faq-list details > div {
  margin-top: 1rem;
}

.faq-list p {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--text-muted);
}

.faq-seo-line {
  margin-top: 3rem;
  text-align: center;
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  color: var(--text-light);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
}

/* ===== 合作 / 来访需求弹窗（中英双语） ===== */
body.coop-open {
  overflow: hidden;
}

.coop-modal {
  position: fixed;
  inset: 0;
  z-index: 1400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.coop-modal[hidden] {
  display: none;
}

.coop-mask {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 26, 0.56);
}

.coop-box {
  position: relative;
  width: 100%;
  max-width: 560px;
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  padding: 2.5rem 2.25rem 2rem;
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  animation: coopIn 0.26s ease both;
}

@keyframes coopIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .coop-box { animation: none; }
}

.coop-close {
  position: absolute;
  top: 0.5rem;
  right: 0.7rem;
  width: 34px;
  height: 34px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: var(--fs-h3);
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s ease;
}

.coop-close:hover {
  color: var(--accent);
}

.coop-eyebrow {
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.coop-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: var(--ls-sub);
  color: var(--text);
  margin-bottom: 0.5rem;
}

.coop-en {
  font-family: var(--font-serif);
  font-size: var(--fs-body);
  font-style: italic;
  line-height: 1.6;
  letter-spacing: var(--ls-body);
  color: var(--text-muted);
  margin-bottom: 1.4rem;
}

.coop-mail {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: var(--fs-lead);
  letter-spacing: var(--ls-sub);
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 0.1rem;
  margin-bottom: 1.5rem;
  word-break: break-all;
}

.coop-kinds {
  list-style: none;
  margin: 0 0 1.6rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.coop-kinds li {
  font-size: var(--fs-small);
  letter-spacing: var(--ls-sub);
  line-height: 1.9;
  color: var(--text);
}

.coop-kinds li span {
  display: block;
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-body);
  line-height: 1.8;
  color: var(--text-light);
}

.coop-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: center;
}

.coop-note {
  margin-top: 1.25rem;
  font-size: var(--fs-small);
  line-height: 1.9;
  letter-spacing: var(--ls-body);
  color: var(--text-muted);
}

.coop-note span {
  display: block;
  font-size: var(--fs-caption);
  color: var(--text-light);
}

@media (max-width: 560px) {
  .coop-modal {
    padding: 1rem;
    align-items: flex-end;
  }

  .coop-box {
    padding: 2.2rem 1.4rem 1.6rem;
    max-height: calc(100vh - 2rem);
  }

  .coop-actions .contact-btn {
    flex: 1 1 100%;
  }
}

/* ===== Consulting · 源山咨询服务 / 源山订制（奥美式编辑排版） ===== */

/* —— Hero：报头信息条 + 分栏金句 + 巨字主张 —— */
.cs-hero {
  position: relative;
  background: var(--bg-dark);
  color: #fff;
  padding: 8.5rem 0 0;
  overflow: hidden;
}

/* 版心三分栏细线：奥美式网格感（纯装饰） */
.cs-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: calc(100% / 3) 100%;
  pointer-events: none;
}

.cs-hero .container {
  position: relative;
}

/* 报头信息条：报纸刊头式三栏 */
.cs-masthead {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.cs-masthead span {
  display: block;
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 0.4rem;
}

.cs-masthead strong {
  font-weight: 500;
  font-size: var(--fs-small);
  letter-spacing: var(--ls-sub);
  color: rgba(255, 255, 255, 0.92);
}

.cs-masthead a {
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  transition: border-color 0.25s ease;
}

.cs-masthead a:hover {
  border-color: #fff;
}

/* 主张（左）与金句（右）非对称双栏 */
.cs-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: 4.5rem;
  align-items: end;
  padding: 5.5rem 0 4.5rem;
}

.cs-eyebrow {
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

/* 深色底上的品牌红一律用提亮档，保证 4.5:1 对比度 */
.cs-hero .cs-eyebrow,
.cs-cta .cs-eyebrow {
  color: var(--accent-light);
}

.cs-title {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6.2vw, 5.4rem);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: var(--ls-display);
  max-width: 11em;
  margin-bottom: 1.75rem;
}

.cs-hero-sub {
  font-size: var(--fs-lead);
  line-height: 2;
  letter-spacing: var(--ls-body);
  color: rgba(255, 255, 255, 0.86);
  max-width: 34em;
  margin-bottom: 2.5rem;
}

.cs-hero-cta,
.cs-cta-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* 金句：红规线 + 衬线意大利体 */
.cs-quote {
  border-top: 2px solid var(--accent-light);
  padding-top: 1.5rem;
}

.cs-quote p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  line-height: 1.65;
  letter-spacing: var(--ls-display);
  color: rgba(255, 255, 255, 0.96);
}

.cs-quote cite {
  display: block;
  margin-top: 1rem;
  font-style: normal;
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

/* 能力条：hero 收底的细规线关键词 */
.cs-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.75rem;
  border-top: 1px solid var(--line-dark);
  padding: 1.5rem 0 2.4rem;
  font-size: var(--fs-caption);
  font-weight: 500;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
}

/* —— 01 服务：编辑式编号清单（替代九张同构卡片） —— */
.cs-editorial {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: 4.5rem;
  align-items: start;
}

.cs-editorial-aside {
  position: sticky;
  top: 7.5rem;
}

.cs-editorial-aside .section-title {
  text-align: left;
  margin-bottom: 1.1rem;
}

.cs-editorial-aside .section-lead {
  text-align: left;
  max-width: 26em;
}

.cs-editorial-rule {
  width: 3rem;
  height: 2px;
  background: var(--accent);
  margin-top: 2rem;
}

.cs-index {
  list-style: none;
}

.cs-row {
  display: grid;
  grid-template-columns: 4.25rem minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.9rem 0.9rem;
  border-top: 1px solid var(--line);
  transition: background 0.25s ease, padding-left 0.25s ease;
}

.cs-row:last-child {
  border-bottom: 1px solid var(--line);
}

.cs-row:hover {
  background: var(--bg-warm);
  padding-left: 1.5rem;
}

.cs-row-num {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  line-height: 1;
  letter-spacing: var(--ls-sub);
  color: var(--accent);
}

.cs-row-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 1.7vw, 1.5rem);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: var(--ls-display);
  margin-bottom: 0.55rem;
}

.cs-row-body p {
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--text-muted);
  max-width: 36em;
}

.cs-row-tags {
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-sub);
  color: var(--text-light);
  white-space: nowrap;
  align-self: start;
  padding-top: 0.4rem;
}

/* —— 02 双主体：非对称分栏 + 中缝细线 —— */
.cs-header-left {
  text-align: left;
  margin: 0 0 3.25rem;
  max-width: none;
}

.cs-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}

.cs-duo-item {
  padding: 2.75rem 3.5rem 2.75rem 0;
}

.cs-duo-item + .cs-duo-item {
  border-left: 1px solid var(--line);
  padding-left: 3.5rem;
}

.cs-duo-label {
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  color: var(--accent);
  margin-bottom: 1.4rem;
}

.cs-duo-item h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2vw, 1.8rem);
  font-weight: 400;
  letter-spacing: var(--ls-display);
  margin-bottom: 0.9rem;
}

.cs-duo-item p {
  font-size: var(--fs-body);
  line-height: 2;
  color: var(--text-muted);
  max-width: 30em;
}

/* —— 03 四步：编号时间线 —— */
.cs-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.cs-step {
  position: relative;
  border-top: 1px solid var(--line);
  padding-top: 1.6rem;
}

.cs-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 2.75rem;
  height: 2px;
  background: var(--accent);
}

.cs-step-num {
  font-family: var(--font-serif);
  font-size: clamp(2.1rem, 3vw, 2.9rem);
  line-height: 1;
  letter-spacing: var(--ls-sub);
  color: var(--accent);
  margin-bottom: 1rem;
}

.cs-step span {
  display: block;
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 0.6rem;
}

.cs-step h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 400;
  letter-spacing: var(--ls-display);
  margin-bottom: 0.65rem;
}

.cs-step p {
  font-size: var(--fs-body);
  line-height: 1.95;
  color: var(--text-muted);
}

/* —— 04 使命：巨型排版宣言 —— */
.cs-mission {
  background: var(--bg-warm);
}

.cs-mission-rule {
  width: 3rem;
  height: 2px;
  background: var(--accent);
  margin: 0 auto 2.75rem;
}

.cs-mission blockquote {
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3.6vw, 2.9rem);
  font-weight: 400;
  line-height: 1.62;
  letter-spacing: var(--ls-display);
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
}

.cs-mission .cs-mission-note {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--fs-body);
  line-height: 2;
  max-width: 720px;
  margin: 2.25rem auto 0;
}

/* —— 05 CTA：左主张 + 右操作面板 —— */
.cs-cta {
  background: var(--bg-dark);
  color: #fff;
}

.cs-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 4.5rem;
  align-items: center;
}

.cs-cta .section-title {
  text-align: left;
  margin-bottom: 0;
}

.cs-mail {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  line-height: 1.4;
  letter-spacing: var(--ls-display);
  margin: 1.75rem 0 2rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
  transition: border-color 0.25s ease;
}

.cs-mail:hover {
  border-color: #fff;
}

.cs-cta-note {
  max-width: 36em;
  font-size: var(--fs-small);
  line-height: 1.95;
  color: rgba(255, 255, 255, 0.82);
}

.cs-cta-note span {
  display: block;
  margin-top: 0.55rem;
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-sub);
  color: rgba(255, 255, 255, 0.72);
}

.cs-cta-panel {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 2.4rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.05);
}

.cs-cta-panel .btn {
  width: 100%;
}

.cs-cta-panel-note {
  margin-top: 0.5rem;
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-sub);
  text-align: center;
  color: rgba(255, 255, 255, 0.72);
}

/* —— 响应式 —— */
@media (max-width: 1024px) {
  .cs-editorial {
    grid-template-columns: 1fr;
    gap: 2.75rem;
  }

  .cs-editorial-aside {
    position: static;
  }

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

  .cs-cta-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .cs-hero {
    padding: 6.5rem 0 0;
  }

  .cs-masthead {
    grid-template-columns: 1fr;
    gap: 0.9rem;
  }

  .cs-hero-grid {
    grid-template-columns: 1fr;
    gap: 2.75rem;
    align-items: start;
    padding: 3.75rem 0 3rem;
  }

  /* 手机上金句放主张前面，保持「引用 → 主张」的叙事顺序 */
  .cs-hero-aside {
    order: -1;
  }

  .cs-title {
    font-size: clamp(2.3rem, 10.5vw, 3rem);
  }

  .cs-duo {
    grid-template-columns: 1fr;
  }

  .cs-duo-item {
    padding: 2rem 0;
  }

  .cs-duo-item + .cs-duo-item {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
  }

  .cs-steps {
    grid-template-columns: 1fr;
  }

  .cs-row {
    grid-template-columns: 3.25rem minmax(0, 1fr);
    padding: 1.6rem 0.5rem;
  }

  .cs-row:hover {
    padding-left: 0.9rem;
  }

  .cs-row-tags {
    grid-column: 2;
    padding-top: 0.75rem;
    white-space: normal;
  }

  .cs-hero-cta .btn,
  .cs-cta-panel .btn {
    width: 100%;
  }

  .cs-cta-panel {
    padding: 1.75rem 1.4rem;
  }
}


/* ==========================================================================
   多语言（中 / 英 / 日 / 韩 / 阿）· 语言切换菜单 + RTL + 阿拉伯字体
   ========================================================================== */

.lang-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 0.6rem);
  inset-inline-end: 0;
  z-index: 1200;
  min-width: 10rem;
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--line);
  box-shadow: 0 12px 32px rgba(26, 26, 26, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}

.lang-switch.open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.lang-menu button {
  display: block;
  width: 100%;
  padding: 0.5rem 0.7rem;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: start;
  font-family: var(--font-sans);
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-none);
  color: var(--text);
  opacity: 0.82;
  transition: background 0.15s, opacity 0.15s;
}

.lang-menu button:hover,
.lang-menu button:focus {
  background: var(--bg-warm);
  opacity: 1;
}

.lang-menu button.is-active {
  color: var(--accent);
  font-weight: 600;
  opacity: 1;
}

.lang-menu button.is-active::after {
  content: ' ✓';
}

/* ---------- 阿拉伯语：字体与排版方向 ---------- */
html[lang="ar"] {
  --font-sans: 'Noto Sans Arabic', 'Noto Sans SC', 'Inter', system-ui, sans-serif;
  --font-serif: 'Noto Naskh Arabic', 'Noto Serif SC', 'Cormorant Garamond', Georgia, serif;
}

html[dir="rtl"] {
  /* 阿拉伯文必须取消字距拉伸，否则字母连写会被破坏 */
  letter-spacing: var(--ls-none);
}

html[dir="rtl"] *,
html[dir="rtl"] *::before,
html[dir="rtl"] *::after {
  letter-spacing: var(--ls-none) !important;
}

html[dir="rtl"] .main-nav a::after {
  left: auto;
  right: 0;
}

html[dir="rtl"] .cs-row:hover {
  transform: translateX(-6px);
}

html[dir="rtl"] .cs-mail,
html[dir="rtl"] .cs-cta-note,
html[dir="rtl"] .cs-quote {
  text-align: start;
}

html[dir="rtl"] .cs-step::before {
  left: auto;
  right: 0;
}

/* 语言菜单在手机上不超出屏幕 */
@media (max-width: 768px) {
  .lang-menu {
    min-width: 8.5rem;
  }
  .lang-menu button {
    padding: 0.6rem 0.7rem;
  }
}


/* ==========================================================================
   B2B 合作落地页（partner/ 多语言）· 全 token 化，沿用主编排版语言
   ========================================================================== */
.pt-hero {
  background: var(--bg);
  padding: 9.5rem 0 4.5rem;
  border-bottom: 1px solid var(--line);
}
.pt-eyebrow {
  display: inline-block;
  margin-bottom: 1.3rem;
  color: var(--accent);
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
}
.pt-h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  line-height: 1.16;
  font-weight: 400;
  margin: 0 0 1.4rem;
  max-width: 20ch;
}
.pt-lead {
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--text-muted);
  max-width: 62ch;
  margin: 0 0 2rem;
}
.pt-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.8rem 3rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}
.pt-fact { min-width: 9rem; }
.pt-fact strong {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: var(--ls-none);
  margin-bottom: 0.25rem;
}
.pt-fact span {
  font-size: var(--fs-caption);
  color: var(--text-muted);
  letter-spacing: var(--ls-eyebrow);
}
.pt-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 2.2rem 0 0;
}

.pt-sec { padding: 4.5rem 0; }
.pt-sec--warm { background: var(--bg-warm); }
.pt-sec--dark { background: var(--bg-dark); color: #fff; }
/* 深色区块内的浅色卡片：标题必须回到深色墨字（白字会落在浅卡上隐形） */
.pt-sec--dark .pt-card h3 { color: var(--text); }
.pt-sec--dark .pt-card .pt-cap { color: var(--accent); }
/* pt 上下文（浅色底）中的描边按钮：白字白边改为品牌红，浅底上才可见 */
.pt-actions .btn-outline,
.pt-sec .btn-outline {
  color: var(--accent);
  border-color: rgba(160, 48, 48, 0.55);
}
.pt-actions .btn-outline:hover,
.pt-sec .btn-outline:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.pt-sec--dark .pt-h2,
.pt-sec--dark .pt-body { color: #fff; }
.pt-sec--dark .pt-kicker,
.pt-sec--dark .pt-cap { color: var(--accent-light); }
.pt-h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 400;
  line-height: 1.25;
  margin: 0 0 1rem;
  max-width: 26ch;
}
.pt-kicker {
  display: block;
  margin-bottom: 0.9rem;
  color: var(--accent);
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
}
.pt-body {
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--text-muted);
  max-width: 66ch;
}
.pt-sec--dark .pt-body { color: rgba(255, 255, 255, 0.78); }

.pt-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2.6rem;
  background: var(--line);
  border: 1px solid var(--line);
}
.pt-card {
  background: var(--bg);
  padding: 2rem 1.9rem;
}
.pt-sec--warm .pt-card { background: var(--bg-warm); }
.pt-card .pt-cap {
  display: block;
  margin-bottom: 0.9rem;
  color: var(--accent);
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
}
.pt-card h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 600;
  margin: 0 0 0.7rem;
  line-height: 1.35;
}
.pt-card p {
  margin: 0;
  font-size: var(--fs-meta);
  line-height: 1.85;
  color: var(--text-muted);
}

.pt-list {
  margin: 2.4rem 0 0;
  border-top: 1px solid var(--line);
}
.pt-row {
  display: grid;
  grid-template-columns: 6.5rem 1fr auto;
  gap: 1.4rem;
  align-items: baseline;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}
.pt-row .pt-idx {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: var(--ls-none);
}
.pt-row h3 {
  margin: 0 0 0.3rem;
  font-size: var(--fs-body);
  font-weight: 600;
}
.pt-row p {
  margin: 0;
  font-size: var(--fs-meta);
  line-height: 1.8;
  color: var(--text-muted);
}
.pt-row .pt-tag {
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-eyebrow);
  color: var(--text-light);
  white-space: nowrap;
}

.pt-faq { margin-top: 2.4rem; border-top: 1px solid var(--line); }
.pt-faq details {
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0;
}
.pt-faq summary {
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-inline-end: 2rem;
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.6;
}
.pt-faq summary::-webkit-details-marker { display: none; }
.pt-faq summary::after {
  content: '＋';
  position: absolute;
  inset-inline-end: 0;
  top: 0;
  color: var(--accent);
  font-weight: 400;
}
.pt-faq details[open] summary::after { content: '－'; }
.pt-faq p {
  margin: 0.85rem 0 0;
  font-size: var(--fs-meta);
  line-height: 1.9;
  color: var(--text-muted);
  max-width: 68ch;
}

.pt-cta {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}
.pt-mail {
  display: inline-block;
  margin-top: 1.6rem;
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.6vw, 1.7rem);
  color: var(--accent);
  border-bottom: 1px solid currentColor;
  padding-bottom: 0.2rem;
  word-break: break-all;
}
.pt-panel {
  border: 1px solid var(--line);
  padding: 1.8rem;
  background: var(--bg-warm);
}
.pt-sec--dark .pt-panel {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line-dark);
}
.pt-panel ul { margin: 0; padding: 0; list-style: none; }
.pt-panel li {
  font-size: var(--fs-meta);
  line-height: 1.75;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--text-muted);
}
.pt-panel li:last-child { border-bottom: 0; }
.pt-panel strong { color: var(--text); font-weight: 600; }
.pt-sec--dark .pt-panel li { color: rgba(255, 255, 255, 0.78); }
.pt-sec--dark .pt-panel strong { color: #fff; }

.pt-langs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  margin-top: 2.4rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}
.pt-langs a {
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid transparent;
  padding-bottom: 0.15rem;
}
.pt-langs a:hover { color: var(--accent); border-bottom-color: currentColor; }
.pt-langs a[aria-current="true"] { color: var(--accent); border-bottom-color: currentColor; }

@media (max-width: 900px) {
  .pt-cards { grid-template-columns: 1fr; }
  .pt-cta { grid-template-columns: 1fr; gap: 2rem; }
  .pt-row { grid-template-columns: 3.4rem 1fr; }
  .pt-row .pt-tag { grid-column: 2; }
  .pt-hero { padding: 8rem 0 3.4rem; }
}
@media (max-width: 480px) {
  .pt-facts { gap: 1.2rem 1.8rem; }
  .pt-card { padding: 1.6rem 1.3rem; }
}

/* ==========================================================================
   移动端触控可达性（2026-09-23 手机端实测补丁）
   实测依据：390×844 / 360×640 无头 Edge，逐元素量测点击目标尺寸
   目标：所有可点元素命中区 ≥44×44（WCAG 2.5.5 / Apple HIG）
   说明：本块位于样式表末尾，同等特异性下按顺序生效，不改动既有规则
   ========================================================================== */
@media (max-width: 768px) {
  /* 顶部：logo 与汉堡按钮 */
  .logo { padding: 0.4rem 0; }
  .menu-toggle {
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    margin-inline-end: -0.35rem;
    align-items: center;
    justify-content: center;
  }
  .lang-toggle {
    min-width: 44px;
    min-height: 44px;
    padding: 0;
  }

  /* 语言下拉：整行 ≥44px 高，手指好点 */
  .lang-menu { min-width: 9.5rem; }
  .lang-menu button { min-height: 44px; padding: 0.7rem 0.85rem; }

  /* 移动菜单：链接与按钮命中区 */
  .main-nav a { display: block; min-width: 44px; padding: 0.55rem 0; }
  .main-nav a::after { bottom: 0.35rem; }
  .main-nav .nav-shop {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.6rem 1.1rem;
  }

  /* 页脚法务链接与正文小链接
     注：.footer-icp 有 transform:scale(0.5)（两个备案号字号减半的实现），
     命中也一并被缩放，所以这里不用 min-height（会把页脚撑高、视觉比例被破坏），
     改用伪元素只做纵向命中区扩展，布局零变化 */
  .footer-credit a,
  .footer-icp a { position: relative; }
  .footer-credit a::after,
  .footer-icp a::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: -140%;
    bottom: -140%;
  }

  /* 正文内联链接与 CTA */
  .pt-mail,
  .cs-mail { display: inline-block; padding: 0.5rem 0; }
  .craft-cta { min-height: 44px; }

  /* B2B 落地页底部语言导航 */
  .pt-langs a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.25rem 0.1rem;
  }

  /* FAQ 折叠条（保持 list-item，避免默认三角消失，只补上下内边距） */
  summary { padding-block: 0.62rem; }
}