/* 金刚经官网 — 禅意视觉 */
:root {
  --ink: #1c1914;
  --ink-soft: #3a342c;
  --paper: #f3efe6;
  --paper-deep: #e7e0d2;
  --mist: #d9d2c4;
  --gold: #8a734f;
  --gold-bright: #b89a64;
  --jade: #4f5f52;
  --jade-soft: #6d7f70;
  --line: rgba(28, 25, 20, 0.12);
  --shadow: rgba(28, 25, 20, 0.06);
  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", "Times New Roman", serif;
  --display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", serif;
  --max: 1120px;
  --narrow: 760px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(184, 154, 100, 0.12), transparent 60%),
    linear-gradient(180deg, #efe9dc 0%, var(--paper) 35%, #ebe5d8 100%);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.85;
  min-height: 100vh;
  position: relative;
}
img, video, iframe { max-width: 100%; height: auto; }
a { color: var(--jade); text-decoration: none; transition: color .25s var(--ease); }
a:hover { color: var(--gold); }
.wrap { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
.wrap.narrow { width: min(100% - 2.5rem, var(--narrow)); }

.ink-wash {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  opacity: .7;
  z-index: 0;
}
.site-header, .site-main, .site-footer { position: relative; z-index: 1; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(243, 239, 230, 0.82);
  border-bottom: 1px solid var(--line);
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: .85rem;
  color: inherit;
}
.brand-mark {
  width: 1.65rem;
  height: 1.65rem;
  border: 1px solid var(--gold);
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(138, 115, 79, .45);
  border-radius: 50%;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: .12em;
}
.brand-text em {
  font-style: normal;
  font-size: .72rem;
  color: var(--ink-soft);
  opacity: .75;
  letter-spacing: .04em;
  max-width: 18rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.site-nav { display: flex; gap: 1.35rem; align-items: center; }
.site-nav a {
  color: var(--ink-soft);
  font-size: .95rem;
  letter-spacing: .08em;
  position: relative;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
}
.site-nav a:hover::after { transform: scaleX(1); }
.nav-toggle {
  display: none;
  width: 2.4rem;
  height: 2.4rem;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 1px;
  margin: 7px 6px;
  background: var(--ink);
  transition: .3s var(--ease);
}

/* Hero */
.hero {
  position: relative;
  min-height: min(88vh, 780px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}
.hero-plane {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero-motif {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: mistDrift 18s ease-in-out infinite alternate;
}
@keyframes mistDrift {
  from { transform: scale(1) translateY(0); }
  to { transform: scale(1.04) translateY(-1.5%); }
}
.hero-inner {
  padding: 6rem 0 5rem;
  animation: riseIn 1.1s var(--ease) both;
}
@keyframes riseIn {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}
.hero-eyebrow {
  margin: 0 0 1rem;
  letter-spacing: .45em;
  text-indent: .45em;
  color: var(--gold);
  font-size: .85rem;
}
.hero-brand {
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(2.6rem, 7vw, 4.8rem);
  letter-spacing: .28em;
  text-indent: .28em;
  line-height: 1.15;
  color: var(--ink);
}
.hero-lead {
  margin: 1.25rem 0 2rem;
  max-width: 28rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
  letter-spacing: .06em;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: .85rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 1.4rem;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: .95rem;
  letter-spacing: .18em;
  cursor: pointer;
  transition: .3s var(--ease);
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--gold); color: #fff; }
.btn-ghost {
  border-color: var(--gold);
  color: var(--ink-soft);
  background: transparent;
}
.btn-ghost:hover { background: rgba(138, 115, 79, .1); color: var(--ink); }

/* Sections */
.section { padding: 4.5rem 0; }
.section-head {
  margin-bottom: 2.5rem;
  text-align: center;
}
.section-head h1,
.section-head h2 {
  margin: 0 0 .6rem;
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: .2em;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}
.section-head p {
  margin: 0;
  color: var(--ink-soft);
  letter-spacing: .12em;
  font-size: .95rem;
}

.verse-band {
  padding: 3rem 0;
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, transparent, rgba(138, 115, 79, .06), transparent);
}
.verse {
  margin: 0 auto;
  max-width: 40rem;
  text-align: center;
}
.verse p {
  margin: 0 0 1rem;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  letter-spacing: .12em;
  line-height: 1.9;
}
.verse cite {
  font-style: normal;
  color: var(--gold);
  letter-spacing: .15em;
  font-size: .9rem;
}

.article-list { display: grid; gap: 0; }
.article-row {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
  animation: riseIn .8s var(--ease) both;
}
.article-row:nth-child(1) { animation-delay: .05s; }
.article-row:nth-child(2) { animation-delay: .12s; }
.article-row:nth-child(3) { animation-delay: .18s; }
.article-row.is-featured h3 { font-size: 1.35rem; }
.article-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: .45rem;
  font-size: .82rem;
  color: var(--ink-soft);
  letter-spacing: .08em;
}
.article-meta .cat { color: var(--gold); }
.article-row h3 {
  margin: 0 0 .55rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: .06em;
  line-height: 1.45;
}
.article-row h3 a { color: var(--ink); }
.article-row h3 a:hover { color: var(--gold); }
.excerpt {
  margin: 0;
  color: var(--ink-soft);
  font-size: .98rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Entry */
.entry { padding-top: 3rem; }
.entry-head { margin-bottom: 2.5rem; text-align: center; }
.entry-head h1 {
  margin: .75rem 0 0;
  font-family: var(--display);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  letter-spacing: .08em;
  line-height: 1.4;
  font-weight: 600;
}
.prose {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--ink-soft);
}
.prose p { margin: 0 0 1.1em; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose h2, .prose h3 {
  color: var(--ink);
  font-family: var(--display);
  letter-spacing: .08em;
  margin: 2em 0 .8em;
}
.prose img {
  display: block;
  margin: 1.5rem auto;
  border: 1px solid var(--line);
}
.prose iframe {
  display: block;
  width: 100%;
  min-height: 420px;
  margin: 1.5rem auto;
  border: 0;
  background: #000;
}
.entry-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.entry-nav a {
  color: var(--ink-soft);
  font-size: .95rem;
  line-height: 1.5;
}
.entry-nav a span {
  display: block;
  margin-bottom: .35rem;
  color: var(--gold);
  font-size: .78rem;
  letter-spacing: .16em;
}
.entry-nav .next { text-align: right; }

.center-box { text-align: center; padding: 5rem 0; }
.center-box h1 { letter-spacing: .3em; }
.muted { color: var(--ink-soft); }
.empty { text-align: center; color: var(--ink-soft); padding: 2rem 0; }

/* Footer */
.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  padding: 2.75rem 0 3rem;
  background: linear-gradient(180deg, transparent, rgba(79, 95, 82, .05));
}
.footer-inner { text-align: center; }
.footer-verse {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  letter-spacing: .08em;
  font-size: .98rem;
}
.footer-meta {
  margin: 0;
  font-size: .82rem;
  color: rgba(58, 52, 44, .7);
  letter-spacing: .06em;
}
.footer-meta a { color: inherit; }

/* Mobile */
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .5rem 1.25rem 1rem;
    background: rgba(243, 239, 230, .96);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .brand-text em { display: none; }
  .hero { min-height: 78vh; }
  .hero-inner { padding: 4.5rem 0 3.5rem; }
  .hero-brand { letter-spacing: .18em; text-indent: .18em; }
  .entry-nav { grid-template-columns: 1fr; }
  .entry-nav .next { text-align: left; }
  .prose iframe { min-height: 240px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}