/* ==========================================================================
   多盈官网 · 共享样式表  /assets/site.css
   极简文字建筑 / 珠宝色分区 / 双层导航 / 编号章节
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: #FBF7F1;
  color: #1C1D21;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.78;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: normal;
  overflow-wrap: break-word;
}

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

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

button {
  font: inherit;
  color: inherit;
}

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

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--navy);
  text-wrap: balance;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

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

main { scroll-margin-top: 140px; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 珠宝色分区 */
  --navy: #10314F;
  --navy-deep: #0B2238;
  --orange: #C2531A;
  --orange-bright: #E4681C;
  --indigo: #4A3F8F;
  --wine: #7A2E3B;
  --teal: #1E8C7A;
  --paper: #FBF7F1;
  --card: #ECE7DF;
  --ink: #1C1D21;
  --ink-soft: #5A5D63;
  --line: #D9D4CC;
  --line-strong: #B5AEA2;

  /* 字体 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* 节奏 */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 72px;
  --sp-7: 104px;

  /* 结构 */
  --wrap: 1200px;
  --gutter: 28px;
  --radius-s: 2px;
  --radius-m: 4px;
  --shadow-hover: 0 4px 12px rgba(28, 29, 33, .10);
  --ease: cubic-bezier(.2, .7, .3, 1);

  /* 深色区块 */
  --on-dark: rgba(255, 255, 255, .84);
  --on-dark-soft: rgba(255, 255, 255, .60);
  --on-dark-line: rgba(255, 255, 255, .18);
}

/* ---------- 3. 排版层级 ---------- */
.display {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--navy);
  margin: 0 0 var(--sp-3);
}

.h1 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.18;
  margin: 0 0 var(--sp-3);
}

.h2 {
  font-size: clamp(23px, 2.8vw, 33px);
  line-height: 1.22;
  margin: 0 0 var(--sp-2);
}

.h3 {
  font-size: 20px;
  line-height: 1.35;
  margin: 0 0 var(--sp-2);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--orange);
  margin: 0 0 var(--sp-2);
}

.lede {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0 0 var(--sp-3);
}

/* ---------- 4. 通用布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: var(--sp-6) 0; }
.section--tight { padding: var(--sp-5) 0; }
.section--loose { padding: var(--sp-7) 0; }

.section--paper { background-color: var(--paper); }
.section--card { background-color: var(--card); }
.section--rule { border-top: 1px solid var(--line); }

.section--navy {
  background-color: var(--navy);
  color: var(--on-dark);
}
.section--indigo {
  background-color: var(--indigo);
  color: var(--on-dark);
}
.section--wine {
  background-color: var(--wine);
  color: var(--on-dark);
}

.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy .display,
.section--navy .h1,
.section--navy .h2,
.section--navy .h3,
.section--indigo h1,
.section--indigo h2,
.section--indigo h3,
.section--indigo .display,
.section--indigo .h1,
.section--indigo .h2,
.section--indigo .h3,
.section--wine h1,
.section--wine h2,
.section--wine h3,
.section--wine .display,
.section--wine .h1,
.section--wine .h2,
.section--wine .h3 {
  color: #fff;
}

.section--navy .lede,
.section--indigo .lede,
.section--wine .lede {
  color: var(--on-dark);
}

.section--navy .eyebrow,
.section--indigo .eyebrow,
.section--wine .eyebrow {
  color: rgba(255, 255, 255, .70);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
  gap: var(--sp-5);
  align-items: start;
}

.split__aside { min-width: 0; }

.grid {
  display: grid;
  gap: var(--sp-3);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 5. 编号章节 ---------- */
.num-section {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 0 var(--sp-4);
  align-items: start;
  padding: var(--sp-5) 0;
  border-top: 1px solid var(--line);
}

.num-section__index {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(44px, 6vw, 72px);
  line-height: .9;
  letter-spacing: -0.04em;
  color: var(--orange-bright);
  font-variant-numeric: tabular-nums;
  margin: 0;
}

.num-section__body {
  max-width: 62ch;
  min-width: 0;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: background-color .2s var(--ease),
              color .2s var(--ease),
              border-color .2s var(--ease),
              box-shadow .24s var(--ease),
              transform .24s var(--ease);
}

.btn--primary {
  background-color: var(--orange);
  color: #fff;
}
.btn--primary:hover {
  background-color: var(--orange-bright);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.btn--ghost {
  background-color: transparent;
  border-color: var(--line);
  color: var(--navy);
}
.btn--ghost:hover {
  border-color: var(--orange-bright);
  color: var(--orange);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.btn--onDark {
  background-color: transparent;
  border-color: rgba(255, 255, 255, .40);
  color: #fff;
}
.btn--onDark:hover {
  background-color: #fff;
  border-color: #fff;
  color: var(--navy);
  transform: translateY(-2px);
}

/* ---------- 7. 卡片与面板 ---------- */
.card {
  background-color: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: var(--sp-3);
  transition: border-color .24s var(--ease),
              box-shadow .24s var(--ease),
              transform .24s var(--ease);
}
.card:hover {
  border-color: var(--orange-bright);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card--panel { background-color: var(--card); }

.card--flat:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--line);
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-color: var(--card);
  overflow: hidden;
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background-color: rgba(255, 255, 255, .45);
}

.panel__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--navy);
}

.panel__body {
  padding: var(--sp-2) 18px var(--sp-3);
}

/* ---------- 8. 数据表格 ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  background-color: #fff;
}

.data-table caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  color: var(--ink-soft);
  padding: 0 0 10px;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table thead th {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink-soft);
  background-color: var(--card);
  border-bottom-color: var(--line-strong);
}

.data-table tbody tr { transition: background-color .16s var(--ease); }
.data-table tbody tr:hover { background-color: var(--paper); }

/* ---------- 9. 数字块 / 状态 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.stat__value {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--navy);
  font-variant-numeric: tabular-nums;
}

.stat--accent .stat__value { color: var(--orange-bright); }

.stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.6;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: #fff;
  color: var(--ink-soft);
}

.tag--open {
  color: var(--teal);
  border-color: rgba(30, 140, 122, .42);
  background-color: rgba(30, 140, 122, .08);
}
.tag--accepted {
  color: var(--wine);
  border-color: rgba(122, 46, 59, .36);
  background-color: rgba(122, 46, 59, .07);
}
.tag--index {
  color: var(--indigo);
  border-color: rgba(74, 63, 143, .36);
  background-color: rgba(74, 63, 143, .07);
}
.tag--price {
  color: var(--orange);
  border-color: rgba(194, 83, 26, .36);
  background-color: rgba(194, 83, 26, .07);
}

.statusbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--ink-soft);
}

.statusbar__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-variant-numeric: tabular-nums;
}

.dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background-color: var(--teal);
}
.dot--wine { background-color: var(--wine); }
.dot--indigo { background-color: var(--indigo); }
.dot--orange { background-color: var(--orange-bright); }

/* ---------- 10. 索引列表 ---------- */
.index-list { border-top: 1px solid var(--line); }

.index-list__item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: var(--sp-2);
  align-items: baseline;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  transition: background-color .18s var(--ease);
}
.index-list__item:hover { background-color: #fff; }

.index-list__num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.index-list__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--navy);
  line-height: 1.5;
}

.index-list__meta {
  font-size: 13px;
  color: var(--ink-soft);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ---------- 11. 面包屑 / 正文 / 折叠 / 引文 / 时间线 ---------- */
.breadcrumbs {
  padding-top: var(--sp-3);
  font-size: 13px;
  color: var(--ink-soft);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line-strong);
}

.breadcrumbs a {
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.breadcrumbs a:hover {
  color: var(--orange);
  border-bottom-color: currentColor;
}

.breadcrumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink);
}

.prose h2 { margin: 2em 0 .6em; font-size: 26px; }
.prose h3 { margin: 1.6em 0 .5em; font-size: 20px; }
.prose p { margin: 0 0 1.2em; }

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.5em;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li { margin-bottom: .5em; }

.prose a {
  color: var(--orange);
  border-bottom: 1px solid var(--orange);
}

.fold {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-color: #fff;
}
.fold + .fold { margin-top: 12px; }

.fold__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
}
.fold__summary::-webkit-details-marker { display: none; }
.fold__summary::after {
  content: "＋";
  margin-left: auto;
  font-size: 16px;
  color: var(--orange);
  line-height: 1;
}
.fold[open] .fold__summary::after { content: "－"; }

.fold__body {
  padding: 0 20px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.pullquote {
  margin: var(--sp-3) 0;
  padding: 20px 24px;
  border-left: 3px solid var(--wine);
  background-color: var(--card);
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

.timeline {
  position: relative;
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.timeline__node {
  position: relative;
  padding-bottom: var(--sp-3);
}
.timeline__node::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background-color: var(--paper);
  border: 2px solid var(--wine);
}

/* ---------- 12. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.media-frame > img,
.media-frame > picture,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--3x2 { aspect-ratio: 3 / 2; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame__tag {
  position: absolute;
  left: 0;
  top: 0;
  padding: 6px 12px;
  background-color: var(--navy);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  line-height: 1.6;
}

.media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 13. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
}

/* 深蓝品牌说明层 */
.brandbar {
  background-color: var(--navy);
  color: var(--on-dark);
  overflow: hidden;
  max-height: 46px;
  transition: max-height .28s var(--ease), opacity .2s var(--ease);
}

.site-header[data-slim] .brandbar {
  max-height: 0;
  opacity: 0;
}

.brandbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  min-height: 44px;
}

.brandbar__motto {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: #fff;
  white-space: nowrap;
}

.brandbar__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 13px;
  color: var(--on-dark);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.brandbar__mail { color: #fff; }
.brandbar__hours { color: var(--on-dark-soft); }
.brandbar__dot { color: rgba(255, 255, 255, .35); }

/* 浅色栏目层 */
.navbar {
  position: relative;
  background-color: var(--paper);
}

.navbar__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-height: 70px;
  transition: min-height .24s var(--ease);
}

.site-header[data-slim] .navbar__inner { min-height: 56px; }

/* 品牌字标 */
.brandmark {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  padding: 6px 0;
}

.brandmark__glyph {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: .06em;
  color: var(--navy);
  border-bottom: 4px solid var(--orange-bright);
  padding-bottom: 2px;
}

.brandmark__tag {
  font-size: 11px;
  letter-spacing: .30em;
  color: var(--ink-soft);
  margin-top: 7px;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 8px 14px;
  background-color: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.nav-toggle:hover { border-color: var(--orange-bright); color: var(--orange); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 14px;
}

.nav-toggle__bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform .24s var(--ease), opacity .2s var(--ease);
}
.nav-toggle__bar:nth-child(1) { top: 0; }
.nav-toggle__bar:nth-child(2) { top: 6px; }
.nav-toggle__bar:nth-child(3) { top: 12px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle__text { line-height: 1; }

/* 主导航 */
.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-left: auto;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.primary-nav__link {
  position: relative;
  display: block;
  padding: 10px 12px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink);
  border-radius: var(--radius-s);
  transition: color .2s var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background-color: var(--orange-bright);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

.primary-nav__link:hover { color: var(--orange); }
.primary-nav__link:hover::after { transform: scaleX(1); }

.primary-nav__link[aria-current="page"] {
  color: var(--navy);
  font-weight: 700;
}
.primary-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background-color: var(--navy);
}

/* 情景化入口 */
.utility-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: var(--sp-3);
  border-left: 1px solid var(--line);
}

.utility-nav__link {
  display: block;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
  color: var(--navy);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color .2s var(--ease),
              color .2s var(--ease),
              background-color .2s var(--ease),
              box-shadow .24s var(--ease);
}

.utility-nav__link:hover {
  border-color: var(--orange-bright);
  color: var(--orange);
  box-shadow: 0 2px 6px rgba(196, 83, 26, .18);
}

.utility-nav__link[data-utility="legacy"] {
  color: var(--ink-soft);
  border-style: dashed;
}
.utility-nav__link[data-utility="legacy"]:hover { color: var(--orange); }

/* 滚动进度线 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background-color: var(--orange-bright);
  z-index: 2;
}

/* ---------- 14. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  background-color: var(--orange-bright);
  color: #fff;
  border-radius: var(--radius-s);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 15. 页脚 ---------- */
.site-footer {
  background-color: var(--navy);
  color: var(--on-dark);
  padding: var(--sp-6) 0 var(--sp-4);
  font-size: 14px;
}

.site-footer a {
  color: rgba(255, 255, 255, .86);
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.site-footer a:hover {
  color: var(--orange-bright);
  border-bottom-color: currentColor;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1.1fr) minmax(0, 2.4fr);
  gap: var(--sp-6) var(--sp-5);
  padding-bottom: var(--sp-5);
  border-bottom: 1px solid var(--on-dark-line);
}

.footer-brand__mark {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .04em;
  color: #fff;
  margin: 0 0 12px;
}

.footer-brand__line {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-dark-soft);
  max-width: 22em;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4) var(--sp-3);
}

.footer-col__title {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: #fff;
  margin: 0 0 16px;
}

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

.footer-col__list a {
  font-size: 14px;
  line-height: 1.7;
}

/* 旧版入口折叠区 */
.legacy {
  margin-top: var(--sp-5);
  border: 1px solid var(--on-dark-line);
  border-radius: var(--radius-m);
  background-color: rgba(255, 255, 255, .05);
  overflow: hidden;
}

.legacy__summary {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  list-style: none;
}
.legacy__summary::-webkit-details-marker { display: none; }
.legacy__summary::after {
  content: "＋";
  margin-left: auto;
  font-size: 16px;
  line-height: 1;
  color: var(--orange-bright);
}
.legacy[open] .legacy__summary::after { content: "－"; }

.legacy__title { color: #fff; }

.legacy__count {
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: #fff;
  border: 1px solid var(--on-dark-line);
  border-radius: 999px;
  background-color: rgba(255, 255, 255, .06);
}

.legacy__body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--on-dark-line);
}

.legacy__note {
  margin: 16px 0 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--on-dark-soft);
  max-width: 56ch;
}

.legacy__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px var(--sp-3);
  font-size: 14px;
}
.legacy__list li { line-height: 1.7; }

/* 页脚底部 */
.footer-bottom {
  padding-top: var(--sp-4);
  display: grid;
  gap: 12px;
}

.footer-contact {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--on-dark);
  font-variant-numeric: tabular-nums;
}

.footer-service {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 13px;
}

.footer-copy {
  margin: 0;
  font-size: 12px;
  color: rgba(255, 255, 255, .45);
  font-variant-numeric: tabular-nums;
}

/* ---------- 16. 显现动画 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
html.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

html.js .num-section__index {
  opacity: .40;
  transition: opacity .24s var(--ease);
}
html.js .is-in .num-section__index,
html.js .num-section.is-in .num-section__index {
  opacity: 1;
}

/* ---------- 17. 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--orange-bright);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--orange-bright);
  outline-offset: 2px;
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .navbar__inner { gap: var(--sp-2); }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    margin-left: 0;
    padding: 8px 0 20px;
    background-color: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(28, 29, 33, .08);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height .32s var(--ease), visibility .32s var(--ease);
  }

  .primary-nav[data-open] {
    max-height: 78vh;
    overflow-y: auto;
    visibility: visible;
  }

  .primary-nav__list {
    display: block;
    padding: 0 var(--gutter);
  }

  .primary-nav__link {
    padding: 13px 2px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }
  .primary-nav__link::after { display: none; }
  .primary-nav__link[aria-current="page"] { color: var(--orange); }

  .utility-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: var(--sp-2) var(--gutter) 0;
    border-left: 0;
    margin-top: 4px;
  }

  .utility-nav__link {
    text-align: center;
    padding: 10px 12px;
    font-size: 14px;
  }
}

@media (max-width: 980px) {
  .split {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-4);
  }

  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .num-section {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 0 var(--sp-3);
  }
}

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-4);
  }

  .legacy__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  :root { --gutter: 20px; }

  .section { padding: var(--sp-5) 0; }
  .section--loose { padding: 64px 0; }

  .brandbar__meta { display: none; }

  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .data-table th,
  .data-table td { padding: 10px 10px; font-size: 13px; }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

  .num-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px 0;
  }

  .num-section__index { font-size: 40px; }

  .index-list__item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 6px 12px;
  }

  .index-list__meta {
    grid-column: 2;
    white-space: normal;
  }

  .brandmark__glyph { font-size: 21px; }

  .footer-legal { gap: 8px 18px; }

  .pullquote { padding: 16px 18px; font-size: 16px; }
}

/* ---------- 19. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

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

  html.js .num-section__index { opacity: 1; }

  .site-header[data-slim] .brandbar { max-height: 0; }
}