/* ==========================================================================
   尚铭铉 · 官方网站
   宣纸 · 墨 · 朱砂 · 泥金 —— 东方编辑风
   ========================================================================== */

:root {
  --paper: #f7f5f0;
  --paper-warm: #efebe3;
  --card: #ffffff;
  --ink: #1a1816;
  --charcoal: #2c2a29;
  --slate: #686461;
  --line: #e2dcd4;
  --cinnabar: #9e2a2b;
  --cinnabar-soft: rgba(158, 42, 43, 0.08);
  --gold: #c5a059;
  --gold-dark: #8c6d37;
  --gold-bg: #f9f6ee;
  --mist: #d8d2c8;

  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  --display: "Copperplate", "Copperplate Gothic Light", Palatino, "Palatino Linotype", "Times New Roman", serif;

  --wrap: 1200px;
  --shadow-soft: 0 4px 20px -2px rgba(26, 24, 22, 0.04);
  --shadow-card: 0 10px 30px -6px rgba(197, 160, 89, 0.12);
  --shadow-lift: 0 22px 40px -18px rgba(26, 24, 22, 0.22);
}

/* --------------------------------------------------------------- reset */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(rgba(197, 160, 89, 0.05) 1px, transparent 1px),
    linear-gradient(to right, rgba(226, 220, 212, 0.16) 1px, transparent 1px);
  background-size: 32px 32px, 128px 128px;
  color: var(--charcoal);
  font-family: var(--serif);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; }
h1, h2, h3, h4, p, ul, ol, li { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--cinnabar); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 4px;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--paper-warm); }
::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 3px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 32px;
}
.wrap.narrow { max-width: 880px; }

.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  z-index: 100;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.1em;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* --------------------------------------------------------------- header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: rgba(247, 245, 240, 0.97);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.site-header.is-scrolled {
  background: rgba(247, 245, 240, 0.84);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  backdrop-filter: blur(16px) saturate(1.15);
  box-shadow: 0 8px 24px -18px rgba(26, 24, 22, 0.35);
}

.header-inner {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 14px; }

.seal {
  width: 44px;
  height: 44px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cinnabar);
  border: 1px solid rgba(197, 160, 89, 0.45);
  border-radius: 3px;
  box-shadow: 0 4px 12px rgba(158, 42, 43, 0.28);
  color: #fff;
  position: relative;
  transform: rotate(-3deg);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.seal::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px dashed rgba(255, 255, 255, 0.32);
  pointer-events: none;
}
.brand:hover .seal { transform: rotate(0) scale(1.04); }
.seal-txt {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--serif);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.06em;
  user-select: none;
}
.seal--sm { width: 38px; height: 38px; }
.seal--xl {
  width: 108px;
  height: 108px;
  border-radius: 4px;
  box-shadow: 0 10px 26px rgba(158, 42, 43, 0.26);
}
.seal--xl .seal-txt { font-size: 24px; letter-spacing: 0.02em; }

.brand-img {
  display: block;
  height: 40px;
  width: auto;
  max-width: 260px;
  filter: drop-shadow(0 2px 6px rgba(26, 24, 22, 0.08));
}

.brand-text { display: flex; flex-direction: column; gap: 2px; }
.brand-row { display: flex; align-items: baseline; gap: 10px; }
.brand-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--ink);
  line-height: 1.2;
}
.brand-en {
  font-family: var(--display);
  font-size: 9px;
  letter-spacing: 0.24em;
  color: var(--gold);
  text-transform: uppercase;
}
.brand-slogan {
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: var(--slate);
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  letter-spacing: 0.16em;
  color: var(--charcoal);
  transition: color 0.25s ease, background-color 0.25s ease;
}
.nav-link:hover { color: var(--ink); background: var(--paper-warm); }
.nav-link.is-active,
.nav-link.is-active:hover {
  color: var(--paper);
  background: var(--ink);
  font-weight: 600;
}

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.menu-btn span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s ease, opacity 0.2s ease;
}
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-menu {
  border-top: 1px solid var(--line);
  background: var(--paper);
  padding: 8px 0 22px;
}
.m-nav { display: flex; flex-direction: column; }
.m-link {
  padding: 14px 0;
  border-bottom: 1px solid rgba(226, 220, 212, 0.8);
  font-size: 14px;
  letter-spacing: 0.16em;
  display: flex;
  justify-content: space-between;
}
.m-link::after { content: "→"; color: var(--gold); font-size: 12px; }
.m-link.is-active { color: var(--cinnabar); font-weight: 600; }
.m-slogan {
  padding: 18px 0 0;
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: var(--gold-dark);
}

/* --------------------------------------------------------------- buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 30px;
  font-size: 13px;
  letter-spacing: 0.18em;
  border: 1px solid var(--ink);
  border-radius: 2px;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}
.btn--ink { background: var(--ink); color: var(--paper); }
.btn--ink:hover { background: var(--cinnabar); border-color: var(--cinnabar); transform: translateY(-2px); }
.btn--line { background: transparent; color: var(--ink); }
.btn--line:hover { border-color: var(--cinnabar); color: var(--cinnabar); transform: translateY(-2px); }

/* --------------------------------------------------------------- hero */
.hero {
  position: relative;
  padding: 152px 0 76px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 78% 38%, rgba(197, 160, 89, 0.12), transparent 46%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-warm) 140%);
}
.hero::before {
  content: "";
  position: absolute;
  left: -180px;
  bottom: -260px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(197, 160, 89, 0.2);
  border-radius: 50%;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 40px;
}
.hero-copy { position: relative; z-index: 2; }

.seal-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  border: 1px solid rgba(197, 160, 89, 0.5);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--charcoal);
  margin-bottom: 30px;
}
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cinnabar); flex: none; }

.hero-title {
  font-size: clamp(38px, 5.6vw, 68px);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 26px;
}
.hero-title .cinnabar { color: var(--cinnabar); }

.hero-desc {
  max-width: 560px;
  font-size: 14.5px;
  line-height: 2.05;
  color: var(--slate);
  text-align: justify;
  letter-spacing: 0.04em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.hero-marks {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 42px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}
.hero-marks b {
  font-family: var(--display);
  font-size: 17px;
  font-weight: 600;
  color: var(--gold-dark);
  margin-right: 4px;
}
.hero-marks .sep { color: var(--line); }

.hero-compass {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-compass svg {
  width: 100%;
  max-width: 500px;
  height: auto;
  filter: drop-shadow(0 18px 40px rgba(26, 24, 22, 0.06));
}

.compass-outer,
.compass-inner { transform-box: fill-box; transform-origin: center; }
.compass-outer { animation: spin 260s linear infinite; }
.compass-inner { animation: spin 200s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }

.ring-gold { fill: none; stroke: var(--gold); stroke-width: 1; opacity: 0.8; }
.ring-ink { fill: none; stroke: var(--ink); stroke-width: 0.8; opacity: 0.26; }
.tick-gold { stroke: var(--gold); stroke-width: 1.3; opacity: 0.9; }
.tick-ink { stroke: var(--ink); stroke-width: 0.8; opacity: 0.3; }
.cmp-branch {
  font-family: var(--serif);
  font-size: 15px;
  fill: var(--ink);
  opacity: 0.62;
}
.cmp-gua { font-size: 18px; fill: var(--gold-dark); opacity: 0.9; }
.taiji-fill { fill: var(--ink); opacity: 0.7; }
.taiji-dot { fill: var(--ink); opacity: 0.7; }
.taiji-dot-inv { fill: var(--paper); }

/* --------------------------------------------------------------- marquee */
.marquee {
  background: var(--ink);
  color: var(--gold);
  border-top: 1px solid rgba(197, 160, 89, 0.28);
  border-bottom: 1px solid rgba(197, 160, 89, 0.28);
  overflow: hidden;
  padding: 15px 0;
}
.marquee-track { display: flex; width: max-content; animation: marquee 70s linear infinite; }
.marquee-seq {
  display: flex;
  align-items: center;
  gap: 26px;
  padding-right: 26px;
  font-size: 12.5px;
  letter-spacing: 0.22em;
  white-space: nowrap;
}
.marquee-seq .dot { background: var(--gold); opacity: 0.7; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* --------------------------------------------------------------- sections */
.section { padding: 92px 0; }
.section--tight { padding: 68px 0; }
.section--warm { background: var(--paper-warm); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section--dark {
  background:
    radial-gradient(circle at 82% 18%, rgba(197, 160, 89, 0.12), transparent 42%),
    var(--ink);
  color: var(--paper);
  border-top: 1px solid rgba(197, 160, 89, 0.3);
  border-bottom: 1px solid rgba(197, 160, 89, 0.3);
}

.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section-head h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink);
  line-height: 1.45;
}
.eyebrow {
  display: block;
  font-family: var(--display);
  font-size: 10.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 10px;
  color: var(--gold-dark);
}
.eyebrow--cinnabar { color: var(--cinnabar); }
.eyebrow--gold { color: var(--gold-dark); }
.eyebrow--light { color: var(--gold); }
.rule {
  display: block;
  width: 46px;
  height: 2px;
  background: var(--cinnabar);
  margin: 16px auto 0;
}
.rule--gold { background: var(--gold); }
.section-note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 2;
  color: var(--slate);
  letter-spacing: 0.03em;
}
.section-head--light h2 { color: #fff; }
.section-head--light .section-note { color: rgba(247, 245, 240, 0.62); }

.grid { display: grid; gap: 22px; }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* --------------------------------------------------------------- entry cards */
.entry-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 26px 22px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.3s ease;
}
.entry-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0.25);
  transform-origin: left;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.entry-card--gold::before { background: var(--gold); }
.entry-card:hover {
  transform: translate(-3px, -5px);
  box-shadow: 6px 8px 0 -1px rgba(226, 220, 212, 0.85), var(--shadow-lift);
  border-color: rgba(197, 160, 89, 0.5);
}
.entry-card:hover::before { transform: scaleX(1); }

.entry-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.entry-num {
  font-family: var(--display);
  font-size: 30px;
  font-weight: 600;
  color: rgba(197, 160, 89, 0.42);
  line-height: 1;
}
.entry-icon { color: var(--gold-dark); }
.entry-icon .ico { width: 26px; height: 26px; }
.entry-en {
  font-family: var(--display);
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 6px;
}
.entry-card h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 10px;
}
.entry-card p {
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--slate);
  text-align: justify;
  flex: 1;
}
.entry-more {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(226, 220, 212, 0.8);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
}
.arrow-ico { width: 14px; height: 14px; transition: transform 0.3s ease; }
.entry-card:hover .arrow-ico,
.card:hover .arrow-ico,
.detail-link:hover .arrow-ico,
.biz-row:hover .arrow-ico { transform: translateX(4px); }

/* --------------------------------------------------------------- principles */
.principles { margin-top: 6px; }
.principle {
  padding: 34px 30px 30px;
  border: 1px solid rgba(247, 245, 240, 0.12);
  background: rgba(44, 42, 41, 0.55);
  position: relative;
  transition: border-color 0.35s ease, background 0.35s ease;
}
.principle:hover { border-color: rgba(197, 160, 89, 0.45); background: rgba(44, 42, 41, 0.8); }
.p-char {
  display: block;
  font-size: 44px;
  font-weight: 300;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 18px;
  letter-spacing: 0;
}
.principle h3 {
  font-size: 17px;
  letter-spacing: 0.16em;
  color: #fff;
  font-weight: 600;
  margin-bottom: 10px;
}
.principle p {
  font-size: 12.5px;
  line-height: 2;
  color: rgba(247, 245, 240, 0.62);
  text-align: justify;
}

/* --------------------------------------------------------------- topic cards */
.topic-card {
  display: flex;
  flex-direction: column;
  padding: 24px 22px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.3s ease;
}
.topic-card:hover {
  transform: translate(-3px, -5px);
  box-shadow: 6px 8px 0 -1px rgba(226, 220, 212, 0.85), var(--shadow-lift);
  border-color: rgba(197, 160, 89, 0.5);
}
.card-top { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.card-en {
  font-family: var(--display);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  line-height: 1.5;
}
.seal-icon {
  width: 38px;
  height: 38px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--cinnabar);
  color: #fff;
  border-radius: 2px;
  box-shadow: 0 3px 9px rgba(158, 42, 43, 0.24);
  transform: rotate(-4deg);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.seal-icon .ico { width: 19px; height: 19px; }
a:hover .seal-icon,
.detail-block:hover .seal-icon { transform: rotate(0) scale(1.06); }

.topic-card h3 {
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 4px;
}
.card-sub {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gold-dark);
  margin-bottom: 12px;
}
.card-text {
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--slate);
  text-align: justify;
  flex: 1;
}
.card-more {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(226, 220, 212, 0.85);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
}

/* --------------------------------------------------------------- course cards */
.course-card {
  display: flex;
  flex-direction: column;
  padding: 30px 28px 22px;
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold);
  border-radius: 2px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}
.course-card:hover {
  transform: translate(-3px, -5px);
  box-shadow: 6px 8px 0 -1px rgba(226, 220, 212, 0.85), var(--shadow-lift);
}
.course-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.course-id { display: flex; align-items: center; gap: 12px; }
.course-step {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--cinnabar);
  background: var(--cinnabar-soft);
  padding: 3px 10px;
  border-radius: 2px;
}
.course-en {
  font-family: var(--display);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}
.course-card h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 5px;
}
.course-card p {
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--slate);
  text-align: justify;
}
.course-card .card-more { margin-top: auto; }
.center-action { display: flex; justify-content: center; margin-top: 38px; }

/* --------------------------------------------------------------- faq */
.faq-list { border-top: 1px solid var(--ink); }
.faq { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 2px;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--cinnabar); }
.faq-ico {
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
}
.faq-ico::before,
.faq-ico::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 1px;
  background: var(--cinnabar);
  transition: transform 0.3s ease;
}
.faq-ico::after { transform: rotate(90deg); }
.faq[open] .faq-ico::after { transform: rotate(0deg); }
.faq-body { padding: 0 2px 22px; }
.faq-body p {
  font-size: 13.5px;
  line-height: 2.05;
  color: var(--slate);
  text-align: justify;
  max-width: 780px;
}

/* --------------------------------------------------------------- page head */
.page-head {
  padding: 128px 0 54px;
  background: var(--paper-warm);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.page-head::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -140px;
  width: 420px;
  height: 420px;
  border: 1px solid rgba(197, 160, 89, 0.22);
  border-radius: 50%;
  pointer-events: none;
}
.page-head--item { padding-bottom: 46px; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--slate);
  margin-bottom: 22px;
}
.breadcrumb a:hover { color: var(--cinnabar); }
.crumb-sep { color: var(--gold); opacity: 0.7; }
.breadcrumb span[aria-current] { color: var(--ink); font-weight: 600; }

.page-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(197, 160, 89, 0.4);
  border-radius: 2px;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--gold-dark);
  margin-bottom: 16px;
}
.page-head h1 {
  font-size: clamp(28px, 3.8vw, 42px);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.45;
  color: var(--ink);
}
.page-head .lead {
  max-width: 720px;
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 2;
  color: var(--slate);
  text-align: justify;
}
.item-subtitle {
  margin-top: 8px;
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
}
/* --------------------------------------------------------------- overview */
.overview-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.overview-title h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink);
  line-height: 1.5;
}
.overview-title .rule { margin-left: 0; }
.overview-text p {
  font-size: 14px;
  line-height: 2.15;
  color: var(--charcoal);
  text-align: justify;
  letter-spacing: 0.03em;
}
.overview-text p + p { margin-top: 18px; }

/* --------------------------------------------------------------- table */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 2px;
}
table { width: 100%; border-collapse: collapse; min-width: 620px; }
thead th {
  padding: 14px 22px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gold-dark);
  border-bottom: 1px solid var(--ink);
  white-space: nowrap;
}
tbody td {
  padding: 16px 22px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--charcoal);
  border-bottom: 1px solid rgba(226, 220, 212, 0.85);
}
tbody td:first-child {
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: rgba(239, 235, 227, 0.55); }

/* --------------------------------------------------------------- detail list */
.detail-list { display: flex; flex-direction: column; gap: 26px; }
.detail-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cinnabar);
  border-radius: 2px;
  padding: 30px 34px 28px;
  transition: box-shadow 0.35s ease, transform 0.35s ease;
}
.detail-block:nth-child(even) { border-left-color: var(--gold); }
.detail-block:hover { box-shadow: var(--shadow-card); transform: translateY(-2px); }
.detail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(226, 220, 212, 0.9);
  margin-bottom: 18px;
}
.detail-id { display: flex; align-items: center; gap: 16px; }
.detail-id h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink);
}
.detail-id p {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--gold-dark);
  margin-top: 2px;
}
.detail-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
  border: 1px solid rgba(158, 42, 43, 0.3);
  padding: 7px 14px;
  border-radius: 2px;
  transition: background 0.3s ease, color 0.3s ease;
}
.detail-link:hover { background: var(--cinnabar); color: #fff; border-color: var(--cinnabar); }
.detail-intro {
  font-size: 13.5px;
  line-height: 2.05;
  color: var(--charcoal);
  text-align: justify;
}
.detail-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 30px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}
.detail-tags { display: flex; flex-wrap: wrap; gap: 8px; align-content: flex-start; }
.detail-side { display: flex; flex-direction: column; gap: 14px; }
.detail-mark { color: var(--gold); opacity: 0.14; line-height: 1; }
.detail-mark .ico { width: 46px; height: 46px; }
.tag {
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--gold-dark);
  background: var(--gold-bg);
  border: 1px solid rgba(197, 160, 89, 0.32);
  padding: 3px 10px;
  border-radius: 2px;
  height: fit-content;
}
.mini-label {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
  margin-bottom: 8px;
}
.detail-scope ul { display: flex; flex-direction: column; gap: 4px; }
.detail-scope li {
  font-size: 12px;
  line-height: 1.85;
  color: var(--charcoal);
  padding-left: 13px;
  position: relative;
}
.detail-scope li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  background: var(--cinnabar);
  border-radius: 50%;
}

/* --------------------------------------------------------------- steps */
.steps { gap: 18px; }
.step {
  position: relative;
  padding: 26px 24px 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.step-num {
  display: block;
  font-family: var(--display);
  font-size: 24px;
  font-weight: 600;
  color: rgba(197, 160, 89, 0.4);
  line-height: 1;
  margin-bottom: 12px;
}
.step h3 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 8px;
}
.step p {
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--slate);
  text-align: justify;
}

/* --------------------------------------------------------------- mini cards */
.mini-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 14px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.mini-card:hover { border-color: var(--gold); transform: translateY(-2px); }
.mini-en {
  font-family: var(--display);
  font-size: 8.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}
.mini-card h3 { font-weight: 600; letter-spacing: 0.1em; font-size: 15px; }
.mini-card .arrow-ico { margin-left: auto; color: var(--cinnabar); }

/* --------------------------------------------------------------- item page */
.item-layout {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 64px;
  padding-top: 62px;
  padding-bottom: 92px;
  align-items: start;
}
.toc {
  position: sticky;
  top: 108px;
  align-self: start;
}
.toc-title {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--gold-dark);
  text-transform: uppercase;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}
.toc-nav { display: flex; flex-direction: column; }
.toc-nav a {
  position: relative;
  padding: 7px 0 7px 15px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
  border-left: 1px solid var(--line);
  transition: color 0.25s ease, border-color 0.25s ease;
}
.toc-nav a::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: 1px;
  height: 0;
  background: var(--cinnabar);
  transition: height 0.3s ease;
}
.toc-nav a:hover { color: var(--cinnabar); }
.toc-nav a.is-current { color: var(--cinnabar); font-weight: 600; }
.toc-nav a.is-current::before { height: 100%; transform: translateY(-50%); }

.item-article { max-width: 820px; }
.item-intro {
  font-size: 16px;
  line-height: 2.1;
  color: var(--charcoal);
  text-align: justify;
  letter-spacing: 0.02em;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}
.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 30px;
}
.fact {
  padding-top: 14px;
  border-top: 2px solid var(--ink);
}
.fact:nth-child(2) { border-top-color: var(--cinnabar); }
.fact:nth-child(3) { border-top-color: var(--gold); }
.fact-k {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
  margin-bottom: 6px;
}
.fact-v {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.item-section { padding-top: 54px; scroll-margin-top: 100px; }
.item-section h2 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
.h2-index {
  font-family: var(--display);
  font-size: 12px;
  font-weight: 600;
  color: var(--cinnabar);
  letter-spacing: 0.06em;
}
.item-section > p {
  font-size: 14px;
  line-height: 2.15;
  color: var(--charcoal);
  text-align: justify;
}

.core-grid { gap: 16px; margin-top: 4px; }
.core-card {
  padding: 22px 22px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.core-card:hover { border-color: rgba(197, 160, 89, 0.55); box-shadow: var(--shadow-soft); }
.core-num {
  display: block;
  font-family: var(--display);
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.core-card h3 {
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 7px;
}
.core-card p {
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--slate);
  text-align: justify;
}

.scope-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 28px;
}
.scope-list li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--charcoal);
}
.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background: var(--cinnabar);
}

.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(var(--gold), rgba(197, 160, 89, 0.2));
}
.timeline li { position: relative; padding-bottom: 24px; }
.timeline li:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--cinnabar);
  background: var(--paper);
  border-radius: 50%;
}
.timeline h3 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink);
  margin-bottom: 4px;
}
.timeline p { font-size: 13px; color: var(--slate); line-height: 1.95; }

.process { border-top: 1px solid var(--line); }
.process li {
  display: flex;
  gap: 22px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: flex-start;
}
.proc-num {
  font-family: var(--display);
  font-size: 13px;
  font-weight: 600;
  color: var(--cinnabar);
  flex: none;
  padding-top: 3px;
  letter-spacing: 0.06em;
}
.process h3 {
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 4px;
}
.process p { font-size: 13px; line-height: 2; color: var(--slate); text-align: justify; }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 62px;
  padding-top: 28px;
  border-top: 1px solid var(--ink);
}
.pager-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
}
.pager-link span {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
}
.pager-link strong {
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.08em;
  transition: color 0.25s ease;
}
.pager-link:hover strong { color: var(--cinnabar); }
.pager-next { text-align: right; }

/* --------------------------------------------------------------- about */
.idea-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}
.idea-mark { text-align: center; }
.idea-mark .seal { margin: 0 auto; }
.idea-slogan {
  margin-top: 26px;
  font-size: 13px;
  letter-spacing: 0.26em;
  line-height: 2.2;
  color: var(--gold-dark);
}
.idea-text h2 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink);
  line-height: 1.5;
}
.idea-text .rule { margin-left: 0; }
.idea-text p {
  font-size: 14px;
  line-height: 2.15;
  color: var(--charcoal);
  text-align: justify;
  margin-top: 18px;
}

.biz-list { border-top: 1px solid var(--ink); }
.biz-row {
  display: flex;
  align-items: center;
  gap: 26px;
  padding: 24px 8px;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease, padding 0.3s ease;
}
.biz-row:hover { background: rgba(255, 255, 255, 0.7); padding-left: 18px; }
.biz-num {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  color: var(--gold);
  flex: none;
}
.biz-row h3 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink);
  margin-bottom: 3px;
}
.biz-row p { font-size: 12.5px; color: var(--slate); }
.biz-row .arrow-ico { margin-left: auto; color: var(--cinnabar); flex: none; }

.principle-card {
  padding: 26px 24px;
  background: rgba(44, 42, 41, 0.55);
  border: 1px solid rgba(247, 245, 240, 0.12);
  transition: border-color 0.3s ease;
}
.principle-card:hover { border-color: rgba(197, 160, 89, 0.45); }
.principle-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #fff;
  margin-bottom: 8px;
}
.principle-card p {
  font-size: 12.5px;
  line-height: 1.95;
  color: rgba(247, 245, 240, 0.62);
  text-align: justify;
}

/* --------------------------------------------------------------- 404 */
.notfound { padding: 160px 0 120px; text-align: center; }
.notfound h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: 0.14em; color: var(--ink); }
.notfound .lead { margin: 16px auto 0; max-width: 560px; font-size: 13.5px; color: var(--slate); }
.notfound .hero-actions { justify-content: center; }

/* --------------------------------------------------------------- footer */
.site-footer {
  background: var(--ink);
  color: rgba(247, 245, 240, 0.62);
  padding: 66px 0 30px;
  border-top: 1px solid rgba(197, 160, 89, 0.3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 38px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(226, 220, 212, 0.16);
}
.f-brand-top { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.f-brand-img {
  display: block;
  height: 34px;
  width: auto;
  max-width: 200px;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.25));
}
.f-brand-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #fff;
}
.f-slogan { font-size: 12px; letter-spacing: 0.2em; color: var(--gold); margin-bottom: 12px; }
.f-intro { font-size: 12px; line-height: 2; color: rgba(247, 245, 240, 0.55); max-width: 300px; text-align: justify; }
.f-links { display: flex; gap: 18px; margin-top: 18px; }
.f-links a {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gold);
  border-bottom: 1px solid rgba(197, 160, 89, 0.4);
  padding-bottom: 2px;
}
.f-links a:hover { color: #fff; border-color: #fff; }

.f-col h3 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: #fff;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(226, 220, 212, 0.16);
  margin-bottom: 14px;
}
.f-col h3 a:hover { color: var(--gold); }
.f-col ul { display: flex; flex-direction: column; gap: 9px; }
.f-col a {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(247, 245, 240, 0.6);
  transition: color 0.25s ease;
}
.f-col a:hover { color: var(--gold); }

.footer-bottom { padding-top: 26px; }
.disclaimer {
  font-size: 11px;
  line-height: 1.95;
  color: rgba(247, 245, 240, 0.42);
  text-align: justify;
  max-width: 980px;
}
.copyright {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: rgba(247, 245, 240, 0.36);
}

/* --------------------------------------------------------------- reveal */
.js .reveal { opacity: 0; transform: translateY(20px); }
.js .reveal.in {
  opacity: 1;
  transform: none;
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.js .reveal:nth-child(2) { transition-delay: 0.08s; }
.js .reveal:nth-child(3) { transition-delay: 0.16s; }
.js .reveal:nth-child(4) { transition-delay: 0.24s; }

/* --------------------------------------------------------------- responsive */
@media (max-width: 1180px) {
  .nav { gap: 0; }
  .nav-link { padding: 8px 10px; font-size: 12.8px; letter-spacing: 0.1em; }
  .hero-grid { gap: 24px; }
}

@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; row-gap: 34px; }
  .item-layout { grid-template-columns: 160px minmax(0, 1fr); gap: 42px; }
  .core-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 920px) {
  .nav { display: none; }
  .menu-btn { display: flex; }
  .header-inner { height: 70px; }
  .hero { padding-top: 120px; }
  .hero-grid { grid-template-columns: 1fr; text-align: left; }
  .hero-compass { order: -1; max-width: 300px; margin: 0 auto 6px; opacity: 0.95; }
  .hero-compass svg { max-width: 300px; }
  .hero-desc { max-width: none; }
  .hero-marks { margin-top: 30px; }
  .page-head { padding-top: 110px; }
  .page-head-row { flex-direction: column; align-items: flex-start; gap: 26px; }
  .overview-grid { grid-template-columns: 1fr; gap: 24px; }
  .overview-title .rule { margin-left: 0; }
  .item-layout { grid-template-columns: 1fr; gap: 0; padding-top: 40px; }
  .toc {
    position: static;
    border: 1px solid var(--line);
    background: var(--card);
    padding: 18px 20px;
    margin-bottom: 8px;
  }
  .toc-title { border-bottom: 0; margin-bottom: 8px; padding-bottom: 0; }
  .toc-nav { flex-direction: row; flex-wrap: wrap; gap: 4px 14px; }
  .toc-nav a { border-left: 0; padding: 4px 0; font-size: 12px; }
  .toc-nav a::before { display: none; }
  .toc-nav a.is-current { border-bottom: 1px solid var(--cinnabar); }
  .detail-body { grid-template-columns: 1fr; gap: 18px; }
  .idea-grid { grid-template-columns: 1fr; gap: 34px; }
  .idea-mark { display: flex; align-items: center; gap: 26px; text-align: left; }
  .idea-slogan { margin-top: 0; }
}

@media (max-width: 760px) {
  .wrap { padding: 0 22px; }
  .section { padding: 64px 0; }
  .section--tight { padding: 50px 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid { gap: 16px; }
  .section-head { margin-bottom: 36px; }
  .brand-en { display: none; }
  .brand-name { font-size: 19px; letter-spacing: 0.16em; }
  .brand-slogan { font-size: 9.5px; letter-spacing: 0.18em; }
  .seal { width: 40px; height: 40px; }
  .hero-title { letter-spacing: 0.08em; }
  .hero-desc { font-size: 13.5px; }
  .btn { padding: 12px 22px; font-size: 12px; }
  .facts { grid-template-columns: 1fr; gap: 16px; }
  .scope-list { grid-template-columns: 1fr; }
  .detail-block { padding: 24px 20px; }
  .detail-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .core-grid { grid-template-columns: 1fr; }
  .item-section { padding-top: 42px; }
  .item-intro { font-size: 14.5px; }
  .pager { margin-top: 44px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .f-brand { grid-column: 1 / -1; }
  .site-footer { padding-top: 48px; }
  .copyright { flex-direction: column; }
  .page-head { padding: 100px 0 40px; }
  .table-wrap { -webkit-overflow-scrolling: touch; }
  .notfound { padding: 130px 0 90px; }
}

@media (max-width: 640px) {
  .grid-4 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .g4 { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1 1 auto; }
  .page-head h1 { font-size: 26px; }
  .marquee { padding: 12px 0; }
  .marquee-seq { font-size: 11px; gap: 18px; padding-right: 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 26px; }
}

/* --------------------------------------------------------------- motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .compass-outer { animation: none !important; }
  .compass-inner { animation: none !important; }
  .marquee-track { animation: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}