:root {
  --pine: #13241c;
  --pine-2: #1c3328;
  --mist: #eef3ef;
  --paper: #f7f8f5;
  --ink: #15211b;
  --muted: #5d6b63;
  --line: rgba(19, 36, 28, .12);
  --leaf: #c5d4c0;
  --spark: #d4e36e;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --rail: 248px;
  --inner: min(920px, calc(100% - 64px));
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; min-height: 100%; }
body.theme-spine {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--mist);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  display: block !important;
  max-width: none !important;
  padding: 0 0 0 var(--rail);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--spark); outline-offset: 3px; }
ol { margin: 0; padding: 0; list-style: none; }

.ico { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.ico-sm { width: 15px; height: 15px; }
.svg-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

/* —— Left spine nav —— */
.site-rail {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--rail);
  z-index: 40;
  display: flex;
  flex-direction: column;
  background: var(--pine);
  color: #e8eee9;
  padding: 36px 28px 28px;
}
.rail-kicker {
  margin: 0 0 14px;
  font-size: 10px;
  letter-spacing: .28em;
  color: var(--spark);
}
.site-rail .brand {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: .04em;
  color: #fff;
}
.rail-nav {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: auto;
}
.rail-nav a {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  color: rgba(232, 238, 233, .62);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  font-size: 14px;
}
.rail-nav a .n {
  font-family: var(--font-serif);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--spark);
}
.rail-nav a:hover, .rail-nav a.on { color: #fff; }
.rail-nav a.on { box-shadow: inset 3px 0 0 var(--spark); padding-left: 8px; margin-left: -8px; }
.rail-foot { margin-top: auto; padding-top: 24px; }
.rail-phone {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(232, 238, 233, .7);
}
.rail-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--spark);
  color: var(--spark);
  font-size: 12px;
  letter-spacing: .16em;
}
.rail-cta:hover { background: var(--spark); color: var(--pine); }

.mobile-bar { display: none; }
.nav-mask {
  display: none;
  position: fixed; inset: 0;
  background: rgba(15, 24, 18, .45);
  z-index: 35;
}
body.nav-open .nav-mask { display: block; }

.site-stage { min-height: 100vh; display: flex; flex-direction: column; background: var(--mist); }
#main { flex: 1; min-width: 0; }

.inner { width: var(--inner); margin: 0 auto; }
.measure { width: min(680px, 100%); }
.eyebrow {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: .28em;
  color: #3f6b52;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 48px;
  padding: 0 26px;
  background: var(--pine);
  color: #f7f8f5;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .14em;
  border: 0;
  cursor: pointer;
}
.btn:hover { background: var(--pine-2); }
.btn-line {
  background: transparent;
  color: var(--pine);
  border: 1px solid var(--pine);
}
.btn-line:hover { background: var(--pine); color: #f7f8f5; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  font-size: 13px;
  letter-spacing: .08em;
  color: #3f6b52;
}
.text-link:hover { color: var(--pine); }

/* Home: title first, image band below */
.open { padding: 72px 0 0; }
.open-copy { width: var(--inner); margin: 0 auto 48px; }
.open-title {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: .02em;
}
.open-lead {
  margin: 0 0 32px;
  max-width: 28em;
  font-size: 17px;
  color: var(--muted);
  line-height: 1.85;
}
.cover-band {
  position: relative;
  height: min(52vh, 520px);
  background: #c5d4c0;
  overflow: hidden;
}
.cover-band img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.1s ease;
}
.cover-band img.is-on, .cover-band img:only-child { opacity: 1; }

.sheet { padding: 72px 0 0; }
.sheet-head, .sheet-body { width: var(--inner); margin: 0 auto; }
.sheet-head h2, .talk h2, .page-open h1, .article h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.2;
}
.sheet-head h2, .talk h2 { font-size: clamp(28px, 3.4vw, 40px); }
.sheet-head.between {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}
.sheet-head.between .text-link { margin-top: 0; }
.sheet-body { padding: 28px 0 0; }
.sheet-band { margin: 48px 0 0; }
.sheet-band img {
  width: 100%;
  height: min(46vh, 420px);
  object-fit: cover;
  background: var(--leaf);
}
.sheet-last { padding-bottom: 88px; }

.prose, .rich-content {
  font-size: 16px;
  line-height: 1.95;
  color: #2a3a32;
  overflow-wrap: anywhere;
}
.prose p, .rich-content p { margin: 0 0 1.15em; }
.prose p:last-child, .rich-content p:last-child { margin-bottom: 0; }
.rich-content h2, .rich-content h3 { font-family: var(--font-serif); color: var(--ink); }
.rich-content img { margin: 1.2em 0; }

/* Contents-page news */
.toc { margin-top: 36px; border-top: 1px solid var(--line); }
.toc li { border-bottom: 1px solid var(--line); }
.toc a {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: baseline;
  padding: 22px 0;
}
.toc-no {
  font-family: var(--font-serif);
  font-size: 13px;
  color: #3f6b52;
  letter-spacing: .08em;
}
.toc-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
}
.toc a:hover .toc-title { color: #3f6b52; }
.toc-date { font-size: 13px; color: var(--muted); letter-spacing: .04em; }
.toc-main { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.toc-sum {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.toc-page a { grid-template-columns: 48px minmax(0, 1fr) auto; }
.faq-toc a { grid-template-columns: 48px minmax(0, 1fr); }
.empty { padding: 40px 0; color: var(--muted); }

.talk { width: var(--inner); margin: 0 auto; padding: 8px 0 0; }
.talk-lead { margin: 16px 0 0; color: var(--muted); max-width: 22em; }
.talk-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 28px 0 32px;
  font-size: 15px;
  color: var(--ink);
}
.talk-row a { border-bottom: 1px solid var(--pine); }
.talk-row-page { margin: 0 0 36px; }

.page-open, .page-body, .article {
  width: var(--inner);
  margin: 0 auto;
}
.page-open { padding: 64px 0 12px; }
.page-open h1 { font-size: clamp(32px, 4.4vw, 52px); }
.page-body { padding: 20px 0 96px; }
.article { padding: 64px 0 96px; }
.article h1 { font-size: clamp(32px, 4vw, 48px); margin-bottom: 16px; }
.article-sub { margin: 0 0 20px; color: var(--muted); font-size: 17px; }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0 0 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.article-cover { margin: 0 0 36px; }
.article-cover img { width: 100%; max-height: 460px; object-fit: cover; }
.related { margin-top: 64px; }
.faq-crumb { margin: 0 0 24px; font-size: 13px; color: var(--muted); }
.faq-crumb span { margin: 0 8px; }
.faq-lead { margin: 0 0 28px; }
.join-action { margin: 28px 0 40px; }

/* Product mosaic */
.mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.mosaic-card {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--leaf);
  color: #fff;
  min-height: 240px;
}
.mosaic-card img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  display: block;
}
.mosaic-cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 18px 18px 16px;
  background: linear-gradient(transparent, rgba(19, 36, 28, .78));
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.mosaic-cap .n { font-size: 12px; color: var(--spark); font-family: var(--font-serif); }
.mosaic-cap .t { font-family: var(--font-serif); font-size: 18px; }
.mosaic-join { margin-top: 8px; }
.mosaic-join .mosaic-card { min-height: 0; }

.c-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--pine);
  padding: 32px 32px 28px;
  max-width: 720px;
}
.c-form .row { margin-bottom: 22px; }
.c-form label {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: 8px;
}
.c-form label .req { color: #9b2c2c; }
.c-form input, .c-form textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  padding: 8px 0 10px;
  outline: none;
  border-radius: 0;
}
.c-form textarea { min-height: 120px; resize: vertical; line-height: 1.7; }
.c-form input:focus, .c-form textarea:focus { border-bottom-color: var(--pine); }
.c-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.c-form .btn { margin-top: 8px; }
.c-form .btn:disabled { opacity: .55; cursor: wait; }
.map-frame { margin-top: 40px; }
.map-frame iframe { width: 100%; height: 320px; border: 0; display: block; }

.pager { margin-top: 40px; }
.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.pagination .page-item .page-link,
.pagination li a,
.pagination li span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  background: transparent;
}
.pagination .active .page-link,
.pagination li.active span,
.pagination .active span {
  background: var(--pine);
  color: #fff;
  border-color: var(--pine);
}
.pagination .disabled span { opacity: .35; }

/* Colophon footer — not a 3-column site map */
.colophon {
  margin-top: auto;
  background: var(--pine);
  color: rgba(232, 238, 233, .72);
  padding: 64px 0 36px;
  text-align: center;
  overflow: hidden;
}
.colo-kicker {
  margin: 0;
  font-size: 10px;
  letter-spacing: .32em;
  color: var(--spark);
}
.colo-mark {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(40px, 8vw, 88px);
  font-weight: 700;
  line-height: 1;
  color: #fff;
  letter-spacing: .04em;
  white-space: nowrap;
}
.colo-lead {
  margin: 20px auto 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.8;
}
.colo-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 10px;
  margin: 32px 0 0;
  font-size: 13px;
  letter-spacing: .06em;
}
.colo-nav a { color: #e8eee9; }
.colo-nav a:hover { color: var(--spark); }
.colo-nav span { opacity: .35; }
.colo-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  margin: 22px 0 0;
  font-size: 13px;
}
.colo-copy { margin-top: 28px; font-size: 12px; opacity: .7; }
.colo-copy a { color: inherit; }
.friend-links {
  margin: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
  font-size: 12px;
}
.friend-links a { opacity: .7; }
.friend-links a:hover { opacity: 1; color: var(--spark); }

.toast {
  position: fixed;
  left: calc(50% + var(--rail) / 2);
  bottom: 28px;
  transform: translateX(-50%) translateY(12px);
  background: var(--pine);
  color: #fff;
  padding: 12px 20px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  z-index: 70;
  transition: opacity .25s, transform .25s;
}
.toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .75s ease, transform .75s ease;
}
[data-reveal].in { opacity: 1; transform: none; }

@media (max-width: 960px) {
  body.theme-spine { padding-left: 0; padding-top: 56px; }
  .site-rail {
    transform: translateX(-105%);
    transition: transform .28s ease;
    width: min(280px, 86vw);
  }
  body.nav-open .site-rail { transform: none; }
  .mobile-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 56px;
    z-index: 45;
    padding: 0 16px;
    background: var(--pine);
    color: #fff;
  }
  .mobile-bar .brand {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 700;
    max-width: 70%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .nav-toggle {
    display: inline-flex;
    background: none;
    border: 0;
    padding: 8px;
    cursor: pointer;
    color: #fff;
  }
  :root { --inner: min(920px, calc(100% - 36px)); }
  .open { padding-top: 36px; }
  .cover-band { height: 42vh; }
  .toc a, .toc-page a { grid-template-columns: 36px minmax(0, 1fr); }
  .toc-date { grid-column: 2; }
  .mosaic { grid-template-columns: 1fr; }
  .c-pair { grid-template-columns: 1fr; }
  .article-cover { width: 100%; }
  .toast { left: 50%; }
  .colo-mark { white-space: normal; font-size: 36px; padding: 0 20px; }
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
  .cover-band img { transition: none; }
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: 0.85em;
}
.lang-switch a { text-decoration: none; color: inherit; }
.lang-switch a.on { font-weight: 600; text-decoration: underline; }
.lang-switch span { opacity: 0.5; }

.product-price{font-weight:600;opacity:.9}