:root {
  --ink: #2c2a26;
  --paper: #faf7f0;
  --paper-deep: #f3ede1;
  --accent: #8a6d3b;
  --accent-soft: rgba(138, 109, 59, 0.12);
  --muted: #6f6a5e;
  --line: rgba(138, 109, 59, 0.22);
  --night: #1e2421;
  --night-ink: #e8e0d0;
  --gold: #c9a86a;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", serif;
  line-height: 1.95;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--accent-soft);
  color: var(--ink);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px;
}

.container-narrow {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 240, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: 0.14em;
  text-indent: 0.14em;
}

.logo small {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.24em;
  text-indent: 0.24em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.nav-cta {
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  border-radius: 999px;
  padding: 6px 20px !important;
  transition: background 0.25s ease, color 0.25s ease !important;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--paper) !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
  border-radius: 2px;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 88vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 100px 28px 70px;
  background:
    radial-gradient(ellipse at top left, rgba(201, 168, 106, 0.12), transparent 55%),
    radial-gradient(ellipse at bottom right, rgba(138, 109, 59, 0.08), transparent 50%),
    var(--paper);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(138, 109, 59, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 109, 59, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-kicker {
  font-size: 0.9rem;
  letter-spacing: 0.5em;
  color: var(--accent);
  margin-bottom: 28px;
  text-indent: 0.5em;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.4rem);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-indent: 0.14em;
  line-height: 1.3;
  color: var(--ink);
}

.hero-sub {
  margin-top: 28px;
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 640px;
  letter-spacing: 0.06em;
}

.hero-actions {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.btn {
  display: inline-block;
  border-radius: 999px;
  padding: 12px 32px;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-indent: 0.12em;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn-primary {
  background: var(--accent);
  color: var(--paper);
  border: 1px solid var(--accent);
}

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

.btn-outline {
  border: 1px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--paper);
}

.hero-tag {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.hero-tag span {
  border: 1px solid var(--line);
  color: var(--accent);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  background: rgba(255, 255, 255, 0.4);
}

.scroll-hint {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  opacity: 0.7;
}

/* Interior page hero */
.hero--page {
  min-height: 48vh;
  padding: 120px 28px 60px;
}

.hero--page h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
}

/* ---------- Sections ---------- */
.section {
  padding: 76px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section--soft {
  background: var(--paper-deep);
}

.section-label {
  font-size: 0.82rem;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--accent);
  margin-bottom: 18px;
}

.section h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.45;
  margin-bottom: 24px;
}

.section .lead {
  font-size: 1.1rem;
}

.prose p {
  margin-bottom: 1.3em;
  text-align: justify;
}

.prose .lead {
  font-size: 1.1rem;
}

.quote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 22px;
  margin: 30px 0;
  color: var(--muted);
}

.quote strong {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Feature strip ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 36px;
}

.feature {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px 24px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 30px rgba(138, 109, 59, 0.08);
}

.feature .mark {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.feature h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}

.feature p {
  font-size: 0.95rem;
  color: var(--muted);
  text-align: left;
}

/* ---------- Cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 36px;
}

.card {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px 24px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 30px rgba(138, 109, 59, 0.08);
}

.card .num {
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1.12rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.card p {
  font-size: 0.95rem;
  color: var(--muted);
  text-align: left;
}

/* ---------- Principles ---------- */
.principles {
  list-style: none;
  margin-top: 28px;
}

.principles li {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.principles li:last-child {
  border-bottom: none;
}

.principles .mark {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  margin-top: 4px;
}

.principles h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.principles p {
  color: var(--muted);
  font-size: 0.95rem;
  text-align: left;
}

/* ---------- Story poem ---------- */
.poem {
  text-align: center;
  margin: 48px 0;
  padding: 36px 20px;
  background: var(--paper-deep);
  border-radius: 4px;
  line-height: 2.2;
  letter-spacing: 0.12em;
  color: var(--ink);
}

.poem .poem-title {
  display: block;
  margin-bottom: 18px;
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  color: var(--accent);
}

/* ---------- Night / Epilogue ---------- */
.night {
  background:
    radial-gradient(ellipse at 20% 20%, rgba(201, 168, 106, 0.10), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(138, 109, 59, 0.10), transparent 50%),
    var(--night);
  color: var(--night-ink);
  border-top: 1px solid rgba(201, 168, 106, 0.25);
}

.night .section-label {
  color: var(--gold);
}

.night h2 {
  color: var(--night-ink);
}

.night .prose p {
  color: rgba(232, 224, 208, 0.9);
}

.night .prose .quote {
  border-left-color: var(--gold);
  color: rgba(232, 224, 208, 0.78);
}

.night .prose .quote strong {
  color: var(--gold);
}

.closing {
  text-align: center;
  padding: 90px 0 80px;
}

.closing .big {
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: 0.15em;
  text-indent: 0.15em;
  line-height: 1.5;
  margin-bottom: 28px;
  font-weight: 500;
}

.closing .small {
  font-size: 0.95rem;
  color: rgba(232, 224, 208, 0.65);
  letter-spacing: 0.12em;
}

/* ---------- CTA ---------- */
.cta {
  background:
    radial-gradient(ellipse at 20% 20%, rgba(201, 168, 106, 0.10), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(138, 109, 59, 0.10), transparent 50%),
    var(--night);
  color: var(--night-ink);
  border-top: 1px solid rgba(201, 168, 106, 0.25);
}

.cta .container {
  text-align: center;
  padding: 90px 28px;
}

.cta .section-label {
  color: var(--gold);
}

.cta h2 {
  color: var(--night-ink);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  line-height: 1.5;
  margin-bottom: 20px;
}

.cta p {
  color: rgba(232, 224, 208, 0.8);
  max-width: 620px;
  margin: 0 auto 32px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  margin-top: 36px;
  align-items: start;
}

.contact-info {
  display: grid;
  gap: 24px;
}

.contact-item {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 20px;
}

.contact-item .label {
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 4px;
}

.contact-item .value {
  font-size: 1.05rem;
  color: var(--ink);
}

.contact-form {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.contact-form label {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
  margin: 16px 0 6px;
  letter-spacing: 0.04em;
}

.contact-form label:first-child {
  margin-top: 0;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  padding: 10px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
}

.contact-form textarea {
  min-height: 120px;
  resize: vertical;
}

.form-status {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.5em;
}

.form-status--ok {
  color: #3f7d4e;
}

.form-status--error {
  color: #a33;
}

.contact-form .btn {
  margin-top: 20px;
  width: 100%;
  text-align: center;
  border: none;
  cursor: pointer;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding: 48px 0 40px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px;
}

.footer-brand .logo {
  font-size: 1.1rem;
}

.footer-brand p {
  color: var(--muted);
  font-size: 0.88rem;
  margin-top: 10px;
  max-width: 320px;
}

.footer-links {
  display: flex;
  gap: 60px;
  flex-wrap: wrap;
}

.footer-links h4 {
  font-size: 0.9rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 12px;
}

.footer-links ul {
  list-style: none;
}

.footer-links a {
  display: block;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 4px 0;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 28px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  border-top: 1px solid var(--line);
  margin-top: 40px;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: 72px;
    right: 0;
    width: 260px;
    height: calc(100vh - 72px);
    background: var(--paper);
    border-left: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 28px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

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

  .nav-toggle {
    display: block;
  }

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

@media (max-width: 560px) {
  .container,
  .container-narrow,
  .nav-inner,
  .footer-inner,
  .footer-bottom {
    padding-left: 20px;
    padding-right: 20px;
  }

  .section {
    padding: 56px 0;
  }

  .hero {
    min-height: 80vh;
    padding: 70px 20px 60px;
  }

  .hero--page {
    min-height: 40vh;
    padding: 100px 20px 50px;
  }

  .hero h1 {
    letter-spacing: 0.08em;
    text-indent: 0.08em;
  }

  .hero-sub {
    letter-spacing: 0.03em;
  }

  .principles li {
    flex-direction: column;
    gap: 8px;
  }
}