/* =========================================================
   龙腾会馆 · 共享站点样式 /assets/site.css
   01 变量与重置
   02 基础排版
   03 通用容器与网格
   04 头部
   05 页脚
   06 通用组件（按钮 / 面包屑 / 内容 / 卡片 / 标签 / 媒体）
   07 响应式与无障碍
   ========================================================= */

/* ---------- 01 变量与重置 ---------- */
:root {
  --ink: #0B0A09;
  --ink-2: #17120F;
  --pine: #1F2A25;
  --gold: #C8A24B;
  --gold-bright: #E6C77A;
  --cinnabar: #B6402E;
  --azurite: #2F5D62;
  --paper: #F2E7D3;
  --sand: #B8AC98;
  --frost: #FCF6EA;

  --hair: rgba(200, 162, 75, 0.30);
  --hair-soft: rgba(242, 231, 211, 0.13);

  --shell: 1200px;
  --gutter: clamp(18px, 4vw, 44px);

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", "Times New Roman", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

/* ---------- 02 基础排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 520px at 82% -12%, rgba(200, 162, 75, 0.11), transparent 62%),
    radial-gradient(880px 480px at -6% 96%, rgba(47, 93, 98, 0.16), transparent 66%),
    linear-gradient(180deg, #0B0A09 0%, #0E0C0A 46%, #0B0A09 100%);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.05vw, 17px);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  position: relative;
  z-index: 1;
  display: block;
}

main:focus { outline: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--frost);
}

h1 { font-size: clamp(38px, 6vw, 76px); letter-spacing: -0.02em; }
h2 { font-size: clamp(28px, 3.6vw, 52px); }
h3 { font-size: clamp(20px, 2.1vw, 28px); }
h4 { font-size: clamp(17px, 1.6vw, 21px); }

strong { font-weight: 700; color: var(--frost); }

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

:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
}

/* ---------- 03 通用容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ---------- 04 头部 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 11px 20px;
  background: var(--gold);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  transform: translateY(-180%);
  transition: transform 0.22s var(--ease);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(11, 10, 9, 0.95);
  border-bottom: 1px solid var(--hair);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.scroll-progress {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cinnabar) 0%, var(--gold) 55%, var(--gold-bright) 100%);
  transition: width 0.1s linear;
}

/* 门楣层 */
.header-top {
  background: linear-gradient(180deg, #120F0D 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--hair-soft);
}

.header-top__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 78px;
  padding-block: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}

.brand__mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
  background: linear-gradient(150deg, rgba(200, 162, 75, 0.22), rgba(200, 162, 75, 0.02));
  box-shadow: inset 0 0 0 1px rgba(200, 162, 75, 0.5);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  background: var(--gold);
  color: var(--ink);
}

.brand__type {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--frost);
}

.brand__en {
  margin-top: 5px;
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--sand);
}

.header-note {
  flex: 1 1 auto;
  padding-left: 20px;
  border-left: 1px solid var(--hair);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--sand);
}

.header-tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.index-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--hair);
  background: rgba(200, 162, 75, 0.05);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.16em;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease);
}

.index-toggle:hover,
.index-toggle[aria-expanded="true"] {
  border-color: var(--gold);
  color: var(--gold-bright);
  background: rgba(200, 162, 75, 0.15);
}

.index-toggle__sign {
  position: relative;
  display: block;
  width: 12px;
  height: 12px;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.index-toggle__sign::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 7px;
  height: 1px;
  background: currentColor;
  transform: rotate(45deg);
}

.index-toggle__label { white-space: nowrap; }

/* 检索索引浮层 */
.index-panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  z-index: 59;
  background: #141110;
  border-bottom: 1px solid var(--hair);
  box-shadow: 0 26px 48px rgba(0, 0, 0, 0.6);
}

.index-panel[hidden] { display: none; }

.index-panel__inner { padding-block: clamp(18px, 3vw, 28px); }

.index-panel__note {
  margin-bottom: 16px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.index-panel__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1px;
  background: var(--hair-soft);
  border: 1px solid var(--hair-soft);
}

.index-panel__link {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 15px 16px;
  background: var(--ink-2);
  transition: background 0.25s var(--ease);
}

.index-panel__link:hover,
.index-panel__link:focus-visible { background: rgba(200, 162, 75, 0.14); }

.index-panel__no {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
  padding-top: 3px;
}

.index-panel__label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--frost);
}

.index-panel__hint {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--sand);
}

/* 匾额层 */
.header-bottom {
  position: relative;
  background: var(--ink);
}

.header-bottom__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-nav { flex: 1 1 auto; }

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0;
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 17px clamp(12px, 1.6vw, 22px);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--sand);
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: clamp(12px, 1.6vw, 22px);
  right: clamp(12px, 1.6vw, 22px);
  bottom: 7px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.32s var(--ease);
}

.site-nav__link:hover {
  color: var(--frost);
  background: rgba(200, 162, 75, 0.07);
}

.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--frost);
  background: rgba(200, 162, 75, 0.09);
}

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  height: 2px;
  background: var(--gold-bright);
}

.site-nav__no {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(200, 162, 75, 0.72);
  transition: color 0.25s var(--ease);
}

.site-nav__link[aria-current="page"] .site-nav__no,
.site-nav__link:hover .site-nav__no { color: var(--gold-bright); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 12px 15px;
  border: 1px solid var(--hair);
  color: var(--paper);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--gold);
  box-shadow: 0 -6px 0 var(--gold), 0 6px 0 var(--gold);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.nav-toggle__text {
  font-size: 13px;
  letter-spacing: 0.18em;
}

.site-header[data-open] .nav-toggle {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink);
}

.site-header[data-open] .nav-toggle__bar {
  background: var(--ink);
  box-shadow: 0 -6px 0 var(--ink), 0 6px 0 var(--ink);
}

/* ---------- 05 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(56px, 8vw, 110px);
  background: linear-gradient(180deg, #100D0B 0%, var(--ink-2) 62%, #0D0B09 100%);
  border-top: 1px solid var(--hair);
}

.footer-main { padding-block: clamp(40px, 6vw, 76px); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}

.footer-brand__mark {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.footer-brand__name {
  margin-top: 12px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--frost);
}

.footer-brand__text {
  margin-top: 12px;
  max-width: 26em;
  font-size: 13px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--sand);
}

.footer-col { min-width: 0; }

.footer-col__title {
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--hair);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.footer-list li + li { margin-top: 10px; }

.footer-list__link {
  display: inline-block;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--sand);
  transition: color 0.22s var(--ease), transform 0.22s var(--ease);
}

.footer-list__link:hover,
.footer-list__link:focus-visible {
  color: var(--gold-bright);
  transform: translateX(3px);
}

.footer-list__link[aria-current="page"] { color: var(--frost); }

.footer-contact { display: grid; gap: 12px; }

.footer-contact__item {
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: 0.03em;
  color: var(--sand);
  word-break: break-word;
}

.footer-contact__key {
  display: inline-block;
  min-width: 3.2em;
  margin-right: 10px;
  padding: 1px 6px;
  border: 1px solid var(--hair);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.footer-bottom { border-top: 1px solid var(--hair-soft); }

.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding-block: 20px;
}

.footer-legal {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sand);
}

.footer-legal--muted { color: rgba(184, 172, 152, 0.75); }

.to-top {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  background: var(--gold);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s var(--ease), background 0.25s var(--ease);
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover { background: var(--gold-bright); }

/* ---------- 06 通用组件 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.3;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn--gold {
  background: var(--gold);
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.btn--gold:hover { background: var(--gold-bright); }

.btn--ghost {
  border: 1px solid var(--hair);
  background: rgba(242, 231, 211, 0.03);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold-bright);
  background: rgba(200, 162, 75, 0.1);
}

/* 面包屑 */
.breadcrumb {
  padding-block: clamp(16px, 2vw, 24px);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sand);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--sand);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "／";
  color: var(--gold);
  opacity: 0.75;
  letter-spacing: 0;
}

.breadcrumb__item[aria-current="page"] { color: var(--gold-bright); }

.breadcrumb__link {
  color: var(--paper);
  transition: color 0.22s var(--ease);
}

.breadcrumb__link:hover { color: var(--gold-bright); }

/* 正文容器 */
.content-wrap {
  position: relative;
  padding-block: clamp(24px, 4vw, 56px) clamp(32px, 5vw, 72px);
}

.prose {
  max-width: 34em;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.85;
  color: var(--paper);
}

.prose p + p { margin-top: 1.15em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  color: var(--frost);
  margin-top: 1.8em;
  margin-bottom: 0.6em;
  letter-spacing: -0.01em;
}

.prose h2 { font-size: clamp(24px, 2.8vw, 36px); }
.prose h3 { font-size: clamp(19px, 2vw, 25px); }

.prose ul,
.prose ol { margin-top: 1em; }

.prose li {
  position: relative;
  padding-left: 22px;
  margin-top: 0.55em;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1px;
  background: var(--gold);
}

.prose a {
  color: var(--gold-bright);
  border-bottom: 1px solid rgba(200, 162, 75, 0.42);
  transition: border-color 0.22s var(--ease);
}

.prose a:hover { border-bottom-color: var(--gold-bright); }

.prose blockquote {
  margin-top: 1.6em;
  padding-left: 20px;
  border-left: 2px solid var(--cinnabar);
  font-family: var(--font-display);
  font-size: 1.05em;
  color: var(--frost);
}

/* 小引子与竖排标签 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.label-v {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.32em;
  color: var(--sand);
}

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

/* 分隔线 / 注释 / 印章 */
.hairline {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--hair) 22%, var(--hair) 78%, transparent);
}

.rule {
  height: 1px;
  border: 0;
  background: var(--hair);
}

.note {
  padding-left: 14px;
  border-left: 1px solid var(--hair);
  font-size: 13px;
  line-height: 1.95;
  letter-spacing: 0.03em;
  color: var(--sand);
}

.stamp {
  display: inline-grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border: 1px solid var(--cinnabar);
  color: var(--cinnabar);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.3;
  text-align: center;
  transform: rotate(-6deg);
}

/* 切角面板与卡片 */
.cut-panel {
  padding: clamp(20px, 3vw, 36px);
  background: linear-gradient(180deg, var(--ink-2) 0%, #100D0B 100%);
  box-shadow: inset 0 0 0 1px var(--hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--pine);
  box-shadow: inset 0 0 0 1px rgba(200, 162, 75, 0.20);
}

.card__no {
  display: block;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.card__title {
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--frost);
}

.card__text {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--sand);
}

/* 标签 */
.tag {
  display: inline-block;
  padding: 4px 11px;
  border: 1px solid var(--hair);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  line-height: 1.6;
  color: var(--gold-bright);
}

.tag--red {
  border-color: rgba(182, 64, 46, 0.55);
  background: rgba(182, 64, 46, 0.14);
  color: #D97262;
}

.tag--blue {
  border-color: rgba(47, 93, 98, 0.65);
  background: rgba(47, 93, 98, 0.18);
  color: #6EA7AE;
}

/* 图片容器基础规则（页面阶段放置 <img> 占位） */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--pine);
  box-shadow: inset 0 0 0 1px var(--hair-soft);
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.media:hover img { transform: scale(1.03); }

.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media--slant {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 42px));
}

.media--placeholder {
  background-image:
    repeating-linear-gradient(135deg, rgba(200, 162, 75, 0.07) 0 10px, transparent 10px 20px),
    linear-gradient(180deg, var(--pine), var(--ink-2));
}

.media__frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(242, 231, 211, 0.18);
  pointer-events: none;
}

.media__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.14em;
  color: var(--sand);
}

/* ---------- 07 响应式与无障碍 ---------- */
@media (max-width: 1100px) {
  .header-note { display: none; }
}

@media (max-width: 900px) {
  .header-top__inner { min-height: 66px; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 58;
    max-height: 0;
    overflow: hidden;
    background: #141110;
    border-bottom: 1px solid var(--hair);
    box-shadow: 0 26px 44px rgba(0, 0, 0, 0.55);
    transition: max-height 0.35s var(--ease);
  }

  .site-header[data-open] .site-nav {
    max-height: min(72vh, 560px);
    overflow-y: auto;
  }

  .site-nav__list { flex-direction: column; align-items: stretch; }

  .site-nav__link {
    justify-content: flex-start;
    width: 100%;
    padding: 16px 20px;
    border-bottom: 1px solid var(--hair-soft);
    font-size: 15px;
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    border-left: 2px solid var(--gold-bright);
    background: rgba(200, 162, 75, 0.13);
  }

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

  .footer-brand { grid-column: 1 / -1; }

  [class*="span-"] { grid-column: span 12; }
}

@media (max-width: 620px) {
  .brand__mark { width: 38px; height: 38px; font-size: 18px; }
  .brand__name { font-size: 17px; letter-spacing: 0.1em; }
  .brand__en { font-size: 9px; letter-spacing: 0.2em; }
  .header-top__inner { gap: 10px; }
  .index-toggle { padding: 9px 12px; font-size: 12px; letter-spacing: 0.1em; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
  .to-top { margin-left: 0; }
  .index-panel__list { grid-template-columns: 1fr; }
}

@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;
    scroll-behavior: auto !important;
  }
}