/* ============================================================
   财神到新棋牌 · 共享 Site Kit（/assets/site.css）
   宣纸底 + 财神红 + 鎏金 + 深棕黑 + 青玉绿
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption, blockquote, dl, dd, hr {
  margin: 0;
}

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; }

a { color: inherit; }

/* ---------- 变量 ---------- */
:root {
  --paper: #F6EEDF;
  --paper-deep: #EFE4CE;
  --cream: #FFFBF3;
  --red: #B3261E;
  --red-deep: #8C1A14;
  --red-soft: #F3DDD7;
  --gold: #C99A2E;
  --gold-dark: #7A5A12;
  --ink: #241C17;
  --ink-soft: #4A3B31;
  --jade: #146B5C;
  --jade-light: #D9EEE7;
  --orange: #D95F2B;
  --mist: #B7A98C;
  --line: #E2D6BE;
  --line-strong: #C9B993;

  --font-display: "Noto Serif SC", "思源宋体", "Songti SC", STSong, serif;
  --font-body: "Noto Sans SC", "思源黑体", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", SFMono-Regular, Consolas, monospace;

  --wrap: 1280px;
  --gutter: 24px;
  --header-h: 104px;

  --shadow-hard: 5px 5px 0 rgba(36, 28, 23, 0.9);
  --shadow-raise: 0 14px 32px -24px rgba(36, 28, 23, 0.75);
}

/* ---------- 基础排版 ---------- */
body {
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 12% 4%, rgba(201, 154, 46, 0.10), transparent 42%),
    radial-gradient(circle at 92% 96%, rgba(179, 38, 30, 0.07), transparent 46%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  letter-spacing: 0.01em;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
  text-wrap: balance;
}

p { text-wrap: pretty; }

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

:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 3px;
  border-radius: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--cream);
  border: 2px solid var(--gold);
  border-radius: 2px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.18s ease;
}

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

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(
    180deg,
    rgba(246, 238, 223, 0.97) 0%,
    rgba(246, 238, 223, 0.78) 58%,
    rgba(246, 238, 223, 0) 100%
  );
  border-bottom: 2px solid transparent;
  transition: background-color 0.26s ease, border-color 0.26s ease, box-shadow 0.26s ease;
}

.site-header[data-scrolled="true"] {
  background: var(--paper);
  border-bottom-color: var(--gold);
  box-shadow: 0 12px 26px -22px rgba(36, 28, 23, 0.95);
}

/* 档案条 */
.header-rail {
  background: var(--ink);
}

.header-rail-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 7px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  line-height: 1.4;
}

.rail-text {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: #E6D9BC;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.rail-text::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  background: var(--gold);
  transform: rotate(45deg);
}

.rail-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
  white-space: nowrap;
}

/* 主行 */
.header-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 32px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--ink);
  border-radius: 3px;
}

.brand-seal {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--red);
  color: #FFF7E9;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
  border: 2px solid var(--ink);
  border-radius: 3px;
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-3deg);
  transition: transform 0.2s ease;
}

.brand:hover .brand-seal {
  transform: rotate(0deg) translateY(-1px);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.07em;
  line-height: 1.25;
}

.brand-line {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  line-height: 1.4;
}

/* 导航 */
.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  border-radius: 2px;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: var(--red);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--red-deep);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after {
  background: var(--red);
  transform: scaleX(1);
}

/* 头部 CTA */
.header-cta {
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 9px 16px;
  font-size: 14.5px;
}

/* 菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 2px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(201, 154, 46, 0.9);
  transition: transform 0.12s ease, box-shadow 0.16s ease;
}

.nav-toggle:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 rgba(201, 154, 46, 0.9);
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gold);
  transition: transform 0.2s ease, top 0.2s ease;
}

.nav-toggle-icon::before { top: 0; }
.nav-toggle-icon::after { top: 10px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 5px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 5px;
  transform: rotate(-45deg);
}

/* 阅读进度条（JS 注入） */
.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: rgba(201, 154, 46, 0.22);
  pointer-events: none;
}

.scroll-meter-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--red), var(--gold));
}

/* ---------- 头部响应式 ---------- */
@media (max-width: 1180px) {
  .brand-line { display: none; }
  .nav-link { padding: 10px 9px; font-size: 14.5px; }
  .nav-link::after { left: 9px; right: 9px; }
}

@media (max-width: 960px) {
  :root { --header-h: 100px; }

  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }
  .header-main { gap: 14px; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: clamp(12px, 3vw, 28px);
    right: clamp(12px, 3vw, 28px);
    z-index: 20;
    display: none;
    margin: 0;
    padding: 10px;
    background: var(--cream);
    border: 2px solid var(--ink);
    border-bottom: 4px solid var(--gold);
    box-shadow: var(--shadow-hard);
  }

  .site-nav[data-open="true"] {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

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

  .nav-link {
    display: block;
    padding: 13px 14px;
    font-size: 16px;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    background: var(--red-soft);
    box-shadow: inset 4px 0 0 var(--red);
  }
}

@media (max-width: 720px) {
  :root { --gutter: 18px; }
  .rail-meta { display: none; }
  .brand-name { font-size: 18px; }
}

@media (max-width: 480px) {
  :root { --header-h: 96px; }
  .brand-seal { width: 36px; height: 36px; font-size: 20px; box-shadow: 2px 2px 0 var(--ink); }
  .brand-name { font-size: 16.5px; letter-spacing: 0.05em; }
  .rail-text { font-size: 10.5px; letter-spacing: 0.1em; }
  .nav-toggle { padding: 8px 12px; }
}

/* ============================================================
   正文容器 / 章节 / 网格
   ============================================================ */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

main { display: block; }

.bleed-under-header {
  margin-top: -1px;
  padding-top: 0;
}

.section {
  padding: clamp(44px, 6.5vw, 84px) 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--red);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.lede {
  max-width: 62ch;
  font-size: clamp(16.5px, 1.5vw, 19px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, var(--gutter));
}

.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--duo { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (max-width: 960px) {
  .grid--thirds { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .grid--split,
  .grid--duo,
  .grid--thirds { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 小工具 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--jade);
  font-weight: 600;
}

.vertical-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  line-height: 1.6;
  color: var(--ink-soft);
}

.gold-rule {
  height: 0;
  border: 0;
  border-top: 2px solid var(--line-strong);
  background: linear-gradient(90deg, var(--gold), rgba(201, 154, 46, 0.08));
  height: 2px;
  margin: clamp(28px, 4.5vw, 52px) 0;
  position: relative;
}

.gold-rule::before {
  content: "";
  position: absolute;
  left: 0;
  top: -5px;
  width: 10px;
  height: 10px;
  background: var(--red);
  transform: rotate(45deg);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(20, 107, 92, 0.16);
  vertical-align: middle;
}

/* ============================================================
   通用按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  background: var(--cream);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 0.12s ease, box-shadow 0.16s ease,
    background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 var(--ink);
}

.btn:active {
  transform: translate(2px, 2px) scale(0.99);
  box-shadow: 1px 1px 0 var(--ink);
}

.btn--primary {
  background: var(--red);
  color: #FFF7E9;
}

.btn--primary:hover {
  background: var(--red-deep);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line-strong);
  box-shadow: none;
}

.btn--ghost:hover {
  background: var(--cream);
  border-color: var(--gold);
  box-shadow: 3px 3px 0 rgba(201, 154, 46, 0.5);
}

.btn--ghost:active {
  box-shadow: none;
}

/* ============================================================
   标签 / 卡片 / 表格 / 图片容器
   ============================================================ */
.seal-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: var(--red);
  color: #FFF7E9;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  border: 1px solid var(--ink);
  border-radius: 2px;
  box-shadow: 2px 2px 0 var(--ink);
}

.seal-tag--jade {
  background: var(--jade-light);
  color: var(--jade);
  border-color: var(--jade);
  box-shadow: 2px 2px 0 rgba(20, 107, 92, 0.28);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--cream);
  color: var(--ink);
  border: 2px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.chip:hover {
  border-color: var(--gold);
  background: #FFF6E4;
}

.chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.card {
  position: relative;
  background: var(--cream);
  border: 2px solid var(--ink);
  padding: clamp(18px, 2.4vw, 26px);
  box-shadow: var(--shadow-hard);
}

.card-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 8px;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--jade);
  margin-bottom: 10px;
}

.card-body {
  font-size: 15px;
  color: var(--ink-soft);
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--cream);
  border: 2px solid var(--line-strong);
}

.ledger {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.ledger thead th {
  background: var(--paper-deep);
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-align: left;
  padding: 11px 14px;
  border-bottom: 2px solid var(--line-strong);
  white-space: nowrap;
}

.ledger td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.ledger tbody tr:last-child td { border-bottom: 0; }

.ledger tbody tr:hover { background: rgba(201, 154, 46, 0.08); }

.media-frame {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--paper-deep);
  background-image: repeating-linear-gradient(
    135deg,
    rgba(201, 154, 46, 0.16) 0 12px,
    transparent 12px 24px
  );
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  margin: clamp(18px, 2.6vw, 30px) 0 0;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-list li + li::before {
  content: "/";
  color: var(--mist);
}

.breadcrumb-link {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.breadcrumb-link:hover {
  color: var(--red);
  border-bottom-color: var(--gold);
}

.breadcrumb-current {
  color: var(--ink);
  font-weight: 600;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 104px);
  padding-top: clamp(40px, 5.5vw, 68px);
  background: var(--ink);
  color: #EADFC8;
  font-size: 15px;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--red) 0 24%, var(--gold) 24% 100%);
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: clamp(28px, 4.5vw, 64px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.footer-seal {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--red);
  color: #FFF7E9;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 900;
  line-height: 1;
  border: 2px solid var(--gold);
  border-radius: 3px;
  transform: rotate(-3deg);
}

.footer-brand-line {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #FBF2DE;
  line-height: 1.5;
}

.footer-note {
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: #B7A98C;
}

.footer-more {
  display: inline-block;
  margin-top: 2px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 154, 46, 0.5);
  padding-bottom: 2px;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-more:hover {
  color: #F0C862;
  border-bottom-color: #F0C862;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(201, 154, 46, 0.32);
}

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

.footer-link {
  font-size: 14.5px;
  color: #E4D8BE;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-link:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.footer-contact-strip {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(201, 154, 46, 0.3);
  border: 1px solid rgba(201, 154, 46, 0.3);
}

.footer-contact-cell {
  background: #2E241D;
  padding: 15px 18px 17px;
}

.footer-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 6px;
}

.footer-value {
  font-size: 13.5px;
  line-height: 1.65;
  color: #E7DCC4;
  word-break: break-word;
}

.footer-legal {
  margin-top: clamp(22px, 3.4vw, 34px);
  padding: 18px 0 30px;
  border-top: 1px solid rgba(201, 154, 46, 0.28);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  font-size: 12.5px;
  color: #A99C84;
}

.footer-copy { color: #C4B69C; }

.footer-legal-note {
  color: #8E8271;
}

.footer-icp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.site-footer :focus-visible {
  outline-color: var(--gold);
}

@media (max-width: 960px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-contact-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-contact-strip { grid-template-columns: minmax(0, 1fr); }
  .footer-seal { width: 40px; height: 40px; font-size: 21px; }
  .footer-brand-line { font-size: 15.5px; }
}

/* ============================================================
   显现 / 返回顶部
   ============================================================ */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.48s ease, transform 0.48s ease;
}

.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.to-top {
  position: fixed;
  right: clamp(14px, 2.5vw, 26px);
  bottom: clamp(14px, 2.5vw, 26px);
  z-index: 90;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--gold);
  border: 2px solid var(--gold);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(36, 28, 23, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease,
    background-color 0.16s ease;
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  background: var(--red);
  color: #FFF7E9;
}

/* ============================================================
   降低动态
   ============================================================ */
@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;
  }

  .js-reveal [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn:hover,
  .nav-toggle:active,
  .btn:active {
    transform: none;
  }
}