:root {
  --bg: #f3f6f4;
  --paper: #ffffff;
  --ink: #1c2a24;
  --muted: #5c6b63;
  --line: #d7e0da;
  --accent: #2f6f5e;
  --accent-soft: #e6f1ec;
  --gold: #b08a4a;
  --shadow: 0 12px 32px rgba(28, 42, 36, 0.08);
  --radius: 14px;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(47, 111, 94, 0.08), transparent 42%),
    radial-gradient(circle at 88% 0%, rgba(176, 138, 74, 0.08), transparent 36%),
    linear-gradient(180deg, #f7faf8 0%, var(--bg) 40%, #eef3f0 100%);
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(92%, var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(247, 250, 248, 0.88);
  border-bottom: 1px solid rgba(215, 224, 218, 0.8);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2f6f5e, #7eb7a4);
  box-shadow: inset 0 0 0 3px rgba(255,255,255,.35);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}
.nav-links a:hover { color: var(--accent); }
.nav-links .active { color: var(--accent); font-weight: 600; }

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: center;
  padding: 56px 0 48px;
}
.hero-copy h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.25;
  letter-spacing: 0.04em;
  font-weight: 760;
}
.hero-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  max-width: 34em;
}
.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(47, 111, 94, 0.22);
}
.btn-ghost {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}
.hero-visual {
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.7);
}
.hero-visual img { width: 100%; height: auto; object-fit: cover; }

.section { padding: 42px 0 56px; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 22px;
}
.section-head h2 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0.04em;
}
.section-head p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.section-head a {
  color: var(--accent);
  font-size: 14px;
  white-space: nowrap;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.article-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(28, 42, 36, 0.04);
  transition: transform .22s ease, box-shadow .22s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.article-card .thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--accent-soft);
}
.article-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.article-card .body {
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.tag {
  display: inline-flex;
  width: fit-content;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
}
.article-card h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.45;
}
.article-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  flex: 1;
}
.meta {
  color: #809089;
  font-size: 12px;
}
.read-more {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
}

.intro-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 8px 24px rgba(28, 42, 36, 0.04);
}
.intro-panel h2 { margin: 0 0 12px; font-size: 24px; }
.intro-panel p { margin: 0 0 12px; color: var(--muted); }
.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 18px;
}
.feature {
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 16px;
}
.feature strong { display: block; margin-bottom: 6px; }
.feature span { color: var(--muted); font-size: 14px; }

.page-banner {
  padding: 36px 0 10px;
}
.page-banner h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 3.5vw, 40px);
}
.page-banner p {
  margin: 0;
  color: var(--muted);
  max-width: 40em;
}

.list-stack {
  display: grid;
  gap: 18px;
}
.list-item {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.list-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.list-item .thumb {
  min-height: 180px;
  background: var(--accent-soft);
}
.list-item .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.list-item .body {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.list-item h2 {
  margin: 0;
  font-size: 22px;
  line-height: 1.4;
}
.list-item p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.article {
  padding: 28px 0 64px;
}
.article-shell {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(28, 42, 36, 0.05);
}
.article-cover img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
}
.article-main {
  padding: 34px clamp(18px, 4vw, 48px) 48px;
  max-width: 820px;
  margin: 0 auto;
}
.article-main .tag { margin-bottom: 12px; }
.article-main h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.4vw, 38px);
  line-height: 1.35;
}
.article-meta {
  color: #809089;
  font-size: 13px;
  margin-bottom: 28px;
}
.article-content h2 {
  margin: 32px 0 12px;
  font-size: 24px;
  line-height: 1.4;
}
.article-content h3 {
  margin: 24px 0 10px;
  font-size: 19px;
}
.article-content p {
  margin: 0 0 16px;
  color: #334039;
  font-size: 16.5px;
  text-align: justify;
}
.article-content ul,
.article-content ol {
  margin: 0 0 18px;
  padding-left: 1.3em;
  color: #334039;
}
.article-content li { margin: 6px 0; }
.figure {
  margin: 22px 0 26px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f7faf8;
}
.figure img { width: 100%; }
.figure figcaption {
  padding: 10px 14px 12px;
  color: var(--muted);
  font-size: 13px;
  background: #f7faf8;
}
.callout {
  margin: 22px 0;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 12px 12px 0;
  color: #2d433a;
}
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}
.article-nav a { color: var(--accent); font-size: 14px; }

.site-footer {
  margin-top: 20px;
  background: #1c2a24;
  color: #c4d0c9;
  padding: 42px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}
.site-footer h3 {
  margin: 0 0 10px;
  color: #f3f7f5;
  font-size: 15px;
}
.site-footer p,
.site-footer a {
  color: #a9b8b0;
  font-size: 13px;
  line-height: 1.8;
}
.site-footer a:hover { color: #fff; }
.copyright {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 12px;
  color: #8fa099;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.12em;
  font-weight: 600;
}
.band {
  background: rgba(255,255,255,.55);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 22px 0;
}
.stat-item {
  padding: 8px 4px;
}
.stat-item strong {
  display: block;
  font-size: 22px;
  margin-bottom: 4px;
  color: var(--ink);
}
.stat-item span {
  color: var(--muted);
  font-size: 13px;
}
.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.topic-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 20px;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.topic-num {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.topic-card h3 { margin: 0; font-size: 22px; }
.topic-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  flex: 1;
}
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.scene-card {
  background: linear-gradient(180deg, #ffffff, #f4f8f5);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 16px;
}
.scene-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.scene-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}
.practice-panel {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 8px 24px rgba(28, 42, 36, 0.04);
}
.practice-panel h2 { margin: 0 0 10px; }
.practice-panel > div > p {
  margin: 0 0 14px;
  color: var(--muted);
}
.practice-list {
  margin: 0;
  padding-left: 1.2em;
  color: #334039;
}
.practice-list li { margin: 8px 0; }
.practice-aside {
  background: var(--accent-soft);
  border-radius: 14px;
  padding: 18px;
}
.practice-aside h3 { margin: 0 0 10px; font-size: 16px; }
.practice-aside ol {
  margin: 0 0 16px;
  padding-left: 1.2em;
  color: #2d433a;
}
.practice-aside a { color: var(--accent); }
.about-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: 18px;
}
.about-grid h2 { margin: 0 0 12px; }
.about-grid p {
  margin: 0 0 12px;
  color: var(--muted);
}
.about-note {
  background: #1c2a24;
  color: #d5e0da;
  border-radius: 16px;
  padding: 24px;
}
.about-note h3 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 18px;
}
.about-note p {
  margin: 0 0 12px;
  color: #c4d0c9;
  font-size: 14px;
}
.about-note strong { color: #fff; }
.filter-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 8px 0 6px;
}
.filter-label {
  color: var(--muted);
  font-size: 13px;
  margin-right: 4px;
}
.filter-chip {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 13px;
}
.filter-chip.active,
.filter-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.list-bottom-card {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
}
.list-bottom-card h2 { margin: 0 0 8px; font-size: 22px; }
.list-bottom-card p { margin: 0; color: var(--muted); max-width: 42em; }
.list-bottom-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .hero,
  .card-grid,
  .feature-row,
  .footer-grid,
  .list-item,
  .topic-grid,
  .scene-grid,
  .stats-row,
  .practice-panel,
  .about-grid {
    grid-template-columns: 1fr;
  }
  .list-item .thumb { min-height: 180px; max-height: 220px; }
  .nav-links { gap: 14px; font-size: 13px; }
  .section-head { align-items: start; flex-direction: column; }
  .list-bottom-card { flex-direction: column; align-items: start; }
  .stats-row { grid-template-columns: 1fr 1fr; }
}