:root {
  --paper: #fbfaf7;
  --white: #ffffff;
  --ink: #202326;
  --ink-soft: #4b5157;
  --mist: #eef0ef;
  --line: rgba(32, 35, 38, .12);
  --line-dark: rgba(255, 255, 255, .16);
  --gold: #b58a36;
  --gold-deep: #8a6524;
  --gold-pale: #e9dcc0;
  --cinnabar: #a83a2a;
  --cinnabar-deep: #7e241e;
  --charcoal: #121416;
  --shadow: 0 18px 55px rgba(18, 20, 22, .12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 10%, rgba(181, 138, 54, .08), transparent 30%),
    linear-gradient(180deg, #fff 0%, var(--paper) 58%, #fff 100%);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.82;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .42;
  background-image:
    linear-gradient(rgba(32, 35, 38, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(32, 35, 38, .035) 1px, transparent 1px);
  background-size: 96px 96px;
}

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

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

.container {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255, 255, 255, .18);
  background: rgba(18, 20, 22, .88);
  color: #fff;
  backdrop-filter: blur(18px);
}

.nav-shell {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand img {
  width: 42px;
  height: 58px;
  object-fit: contain;
}

.brand-text {
  display: grid;
  gap: 1px;
  line-height: 1.15;
}

.brand-name {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .08em;
}

.brand-sub {
  color: rgba(255, 255, 255, .68);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-dark);
  background: transparent;
  color: #fff;
  border-radius: 8px;
  font-size: 22px;
  cursor: pointer;
}

.nav-links {
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
  gap: 6px;
}

.nav-links a {
  display: grid;
  gap: 1px;
  min-width: 122px;
  padding: 10px 12px;
  border-radius: 8px;
  color: rgba(255, 255, 255, .88);
  transition: background .2s ease, color .2s ease, transform .2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(181, 138, 54, .17);
  color: #fff;
  transform: translateY(-1px);
}

.nav-title {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .04em;
}

.nav-note {
  color: rgba(255, 255, 255, .58);
  font-size: 12px;
  white-space: nowrap;
}

.hero {
  min-height: calc(100vh - 76px);
  position: relative;
  display: grid;
  align-items: end;
  overflow: visible;
  color: #fff;
  background: #dfe1df;
  padding-bottom: 34px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(10, 12, 13, .76) 0%, rgba(10, 12, 13, .36) 42%, rgba(10, 12, 13, .08) 76%),
    linear-gradient(180deg, rgba(10, 12, 13, .12) 0%, rgba(10, 12, 13, .78) 100%),
    url("assets/hero-banner.jpg");
  background-size: cover;
  background-position: center;
  transform: scale(1.01);
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 110px 0 72px;
}

.seal-line {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--gold-pale);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .32em;
}

.seal-line::before {
  content: "";
  width: 38px;
  height: 1px;
  background: currentColor;
}

.hero h1 {
  max-width: 720px;
  margin: 18px 0 18px;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1.05;
  letter-spacing: .08em;
  font-weight: 700;
}

.hero-lede {
  max-width: 640px;
  margin: 0 0 24px;
  color: rgba(255, 255, 255, .82);
  font-size: clamp(17px, 2vw, 22px);
}

.hero-credentials {
  max-width: 700px;
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(233, 220, 192, .36);
  border-bottom: 1px solid rgba(233, 220, 192, .22);
  background: linear-gradient(90deg, rgba(18, 20, 22, .34), rgba(18, 20, 22, .08));
  backdrop-filter: blur(2px);
}

.hero-credentials li {
  width: 100%;
  padding: 10px 14px 10px 34px;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, .10);
  color: rgba(255, 255, 255, .88);
  font-size: clamp(14px, 1.25vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  text-shadow: 0 1px 12px rgba(0, 0, 0, .34);
}

.hero-credentials li:last-child {
  border-bottom: 0;
}

.hero-credentials li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 20px;
  width: 6px;
  height: 6px;
  border-radius: 99px;
  background: var(--gold-pale);
  box-shadow: 0 0 0 4px rgba(181, 138, 54, .12);
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  letter-spacing: .03em;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--cinnabar) 0%, var(--cinnabar-deep) 100%);
  color: #fff;
  box-shadow: 0 14px 30px rgba(168, 58, 42, .24);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, .42);
  color: #fff;
  background: rgba(255, 255, 255, .08);
}

.btn-dark {
  background: var(--charcoal);
  color: #fff;
}

main {
  overflow: hidden;
}

.section {
  padding: 118px 0;
}

.section.compact {
  padding: 82px 0;
}

.section.dark {
  background:
    linear-gradient(135deg, rgba(181, 138, 54, .08), transparent 38%),
    var(--charcoal);
  color: #fff;
}

.section.mist {
  background: rgba(238, 240, 239, .68);
}

.section-head {
  display: grid;
  gap: 12px;
  max-width: 780px;
  margin-bottom: 42px;
}

.kicker {
  color: var(--cinnabar);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .2em;
}

.section.dark .kicker {
  color: var(--gold-pale);
}

h2,
h3,
h4 {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  line-height: 1.28;
  letter-spacing: .04em;
}

h2 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 56px);
}

h3 {
  margin: 0;
  font-size: clamp(25px, 2.4vw, 34px);
}

h4 {
  margin: 0 0 10px;
  font-size: 21px;
}

p {
  margin: 0;
}

.lead {
  color: var(--ink-soft);
  font-size: 19px;
}

.section.dark .lead,
.section.dark p {
  color: rgba(255, 255, 255, .76);
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: 64px;
  align-items: start;
}

.image-panel {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--mist);
  box-shadow: var(--shadow);
}

.image-panel img {
  width: 100%;
  height: 100%;
  min-height: 520px;
  object-fit: cover;
}

.image-panel.logo-panel {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 42%, rgba(181, 138, 54, .22), transparent 34%),
    linear-gradient(180deg, #f6f5f0, #fff);
}

.image-panel.logo-panel img {
  width: min(58%, 300px);
  height: auto;
  min-height: 0;
  object-fit: contain;
}

.image-panel.lecture-poster {
  min-height: 0;
  aspect-ratio: 1 / 1;
  background: #e9eef0;
}

.image-panel.lecture-poster img {
  height: 100%;
  min-height: 0;
  object-fit: cover;
}

.stack {
  display: grid;
  gap: 28px;
}

.content-block {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.content-block:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.check-list,
.plain-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.check-list li,
.plain-list li {
  position: relative;
  padding-left: 25px;
  color: var(--ink-soft);
}

.check-list li::before,
.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: var(--gold);
}

.number-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  counter-reset: people;
}

.number-list li {
  counter-increment: people;
  display: flex;
  gap: 12px;
  color: var(--ink-soft);
}

.number-list li::before {
  content: counter(people, decimal-leading-zero);
  color: var(--gold-deep);
  font-family: Georgia, serif;
  font-weight: 700;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  align-items: stretch;
  counter-reset: module;
}

.module {
  position: relative;
  min-height: 330px;
  height: 100%;
  padding: 34px 34px 30px;
  border: 1px solid rgba(32, 35, 38, .10);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(181, 138, 54, .10), transparent 42%),
    rgba(255, 255, 255, .82);
  box-shadow: 0 16px 42px rgba(18, 20, 22, .075);
  overflow: hidden;
  counter-increment: module;
}

.module::before {
  content: "0" counter(module);
  position: absolute;
  top: 28px;
  right: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 34px;
  border: 1px solid rgba(181, 138, 54, .34);
  border-radius: 999px;
  color: var(--cinnabar);
  background: rgba(255, 255, 255, .82);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .03em;
}

.module::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold), transparent);
}

.module h3 {
  position: relative;
  max-width: calc(100% - 72px);
  margin: 12px 0 24px;
  padding-top: 18px;
  font-size: clamp(25px, 2vw, 31px);
  line-height: 1.28;
  letter-spacing: .03em;
}

.module h3::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold), rgba(181, 138, 54, .12));
}

.module p {
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.86;
}

.module .check-list,
.module .plain-list {
  gap: 12px;
  margin-top: 0;
}

.module .check-list li,
.module .plain-list li {
  min-height: 54px;
  padding: 13px 0 13px 32px;
  border-top: 1px solid rgba(32, 35, 38, .08);
  line-height: 1.76;
}

.module .check-list li::before,
.module .plain-list li::before {
  top: 25px;
  width: 7px;
  height: 7px;
  box-shadow: 0 0 0 5px rgba(181, 138, 54, .10);
}

.ceremony-teaser {
  display: grid;
  grid-template-columns: minmax(0, .75fr) minmax(0, 1fr);
  gap: 50px;
  align-items: center;
}

.ink-card {
  padding: 34px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .04);
}

.ink-card h3 {
  color: #fff;
}

.travel-list {
  display: grid;
  gap: 18px;
}

.travel-item {
  display: grid;
  gap: 8px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.travel-item:last-child {
  border-bottom: 0;
}

.tag {
  display: inline-flex;
  width: fit-content;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--cinnabar);
  background: rgba(168, 58, 42, .09);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}

.page-hero {
  padding: 86px 0 72px;
  background:
    linear-gradient(90deg, rgba(18, 20, 22, .88), rgba(18, 20, 22, .58)),
    url("assets/hero-banner.jpg");
  background-size: cover;
  background-position: center;
  color: #fff;
}

.page-hero .lead {
  color: rgba(255, 255, 255, .78);
  max-width: 700px;
}

.notice {
  min-height: 340px;
  display: grid;
  place-items: center;
  padding: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.notice strong {
  display: block;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: .08em;
}

.footer {
  padding: 36px 0;
  color: rgba(255, 255, 255, .62);
  background: var(--charcoal);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.whatsapp-float {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 54px;
  padding: 13px 20px;
  border-radius: 999px;
  color: #fff;
  background: #25d366;
  box-shadow: 0 16px 36px rgba(37, 211, 102, .32), 0 6px 14px rgba(18, 20, 22, .18);
  font-size: 16px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.whatsapp-float:hover {
  background: #1fb958;
  transform: translateY(-2px);
  box-shadow: 0 20px 42px rgba(37, 211, 102, .38), 0 8px 18px rgba(18, 20, 22, .2);
}

.whatsapp-icon {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .18);
  font-size: 16px;
  line-height: 1;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-shell {
    min-height: 68px;
  }

  .brand img {
    width: 34px;
    height: 48px;
  }

  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 68px;
    display: none;
    padding: 10px 24px 18px;
    background: rgba(18, 20, 22, .96);
    border-bottom: 1px solid var(--line-dark);
  }

  .nav-links.open {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-links a {
    min-width: 0;
  }

  .hero {
    min-height: 780px;
  }

  .hero::before {
    background-position: 58% center;
  }

  .two-col,
  .module-grid,
  .ceremony-teaser {
    grid-template-columns: 1fr;
  }

  .module {
    min-height: 0;
  }

  .section {
    padding: 82px 0;
  }

  .image-panel,
  .image-panel img {
    min-height: 420px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .container {
    width: min(100% - 32px, 1180px);
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-sub {
    display: none;
  }

  .nav-links.open {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 720px;
  }

  .hero-inner {
    padding: 86px 0 48px;
  }

  .hero h1 {
    font-size: clamp(40px, 15vw, 68px);
  }

  .hero-actions,
  .section-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .section {
    padding: 66px 0;
  }

  .hero-credentials {
    margin-bottom: 28px;
  }

  .hero-credentials li {
    width: 100%;
    padding: 9px 12px 9px 28px;
    font-size: 15px;
  }

  .hero-credentials li::before {
    left: 12px;
    top: 19px;
  }

  .module,
  .ink-card {
    padding: 22px;
  }

  .module h3 {
    max-width: 100%;
    margin-top: 30px;
    font-size: 23px;
  }

  .module::before {
    top: 18px;
    right: 18px;
    width: 42px;
    height: 30px;
  }

  .module .check-list li,
  .module .plain-list li {
    min-height: 0;
    padding: 11px 0 11px 28px;
  }

  .module .check-list li::before,
  .module .plain-list li::before {
    top: 22px;
  }

  .footer-inner {
    display: grid;
  }

  .whatsapp-float {
    right: 16px;
    bottom: 16px;
    min-height: 50px;
    padding: 12px 16px;
    font-size: 15px;
  }
}