/* ============================================
   优博体育 · 全站共享样式
   文件：/assets/site.css
   ============================================ */

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

:root {
  --c-bg: #F2F4F8;
  --c-navy: #0B1D3A;
  --c-navy-2: #16325A;
  --c-accent: #F28C28;
  --c-accent-2: #E07F14;
  --c-ink: #1A1A2E;
  --c-muted: #4A4A68;
  --c-line: #D1D6E0;
  --c-green: #00A676;
  --c-red: #E63946;
  --c-white: #FFFFFF;
  --font-head: 'Arial Black', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-body: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', sans-serif;
  --font-mono: 'Courier New', 'Roboto Mono', monospace;
  --shadow-paper: 4px 4px 0 var(--c-line);
  --cut: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-ink);
  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(11, 29, 58, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 29, 58, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-font-smoothing: antialiased;
}

@media (min-width: 992px) {
  body { padding-left: 64px; }
}

@media (max-width: 991px) {
  body { padding-top: 56px; }
}

body.is-nav-open {
  overflow: hidden;
}

@media (min-width: 992px) {
  body.is-nav-open { overflow: visible; }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  line-height: 1.25;
  color: var(--c-navy);
  margin: 0 0 0.55em;
}

h1 { font-size: clamp(28px, 4vw, 42px); }
h2 { font-size: clamp(22px, 3vw, 32px); }
h3 { font-size: 19px; }
h4 { font-size: 17px; }

p { margin: 0 0 1em; }

a {
  color: var(--c-navy);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--c-line);
}

a:hover {
  color: var(--c-accent);
  text-decoration-color: var(--c-accent);
}

::selection {
  background: var(--c-accent);
  color: var(--c-navy);
}

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  background: none;
  padding: 0;
  border: 0;
}

#main-content {
  min-height: 65vh;
  outline: none;
}

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

/* ---------- 骨架组件 ---------- */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px;
}

@media (min-width: 992px) {
  .container { padding: 40px 48px; }
}

.container--narrow {
  max-width: 880px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-muted);
}

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

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

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

.breadcrumb a:hover {
  color: var(--c-accent);
}

.breadcrumb [aria-current="page"] {
  color: var(--c-accent);
}

.page-intro {
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--c-navy);
  position: relative;
}

.page-intro__index {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.page-intro__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.08;
  text-transform: uppercase;
  color: var(--c-navy);
}

.page-intro__title::before {
  content: "// ";
  color: var(--c-accent);
}

.page-intro__desc {
  margin: 0;
  max-width: 680px;
  color: var(--c-muted);
  line-height: 1.8;
}

.section-head {
  margin: 0 0 24px;
}

.section-head__kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.section-head__kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: currentColor;
  transform: skewX(-28deg);
}

.section-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.15;
  color: var(--c-navy);
}

.section-head__desc {
  margin: 8px 0 0;
  max-width: 640px;
  color: var(--c-muted);
}

/* ---------- 通用按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border: 1px solid var(--c-navy);
  background: var(--c-navy);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  clip-path: var(--cut);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}

.btn:hover {
  background: var(--c-navy-2);
  color: var(--c-white);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 rgba(242, 140, 40, .4);
}

.btn--primary {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-navy);
}

.btn--primary:hover {
  background: var(--c-accent-2);
  box-shadow: 4px 4px 0 rgba(11, 29, 58, .18);
}

.btn--ghost {
  background: transparent;
  color: var(--c-navy);
}

.btn--ghost:hover {
  background: var(--c-navy);
  color: var(--c-white);
  box-shadow: 4px 4px 0 rgba(242, 140, 40, .35);
}

.btn--sm {
  padding: 8px 15px;
  font-size: 13px;
}

/* ---------- 标签 ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--c-line);
  background: var(--c-white);
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag--accent {
  color: var(--c-accent);
  border-color: rgba(242, 140, 40, .5);
  background: rgba(242, 140, 40, .06);
}

.tag--dark {
  color: var(--c-white);
  border-color: var(--c-navy);
  background: var(--c-navy);
}

.tag--green {
  color: var(--c-green);
  border-color: rgba(0, 166, 118, .4);
  background: rgba(0, 166, 118, .06);
}

.tag--red {
  color: var(--c-red);
  border-color: rgba(230, 57, 70, .4);
  background: rgba(230, 57, 70, .06);
}

/* ---------- 纸张面板 ---------- */

.panel {
  position: relative;
  padding: 20px;
  border: 1px solid var(--c-line);
  background: var(--c-white);
  box-shadow: var(--shadow-paper);
}

.panel--dark {
  border-color: var(--c-navy);
  background: var(--c-navy);
  color: var(--c-white);
  box-shadow: 4px 4px 0 rgba(11, 29, 58, .22);
}

.panel--accent {
  border-color: var(--c-accent);
  background: var(--c-accent);
  color: var(--c-navy);
  box-shadow: 4px 4px 0 rgba(242, 140, 40, .28);
}

.panel__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.panel--dark .panel__label,
.panel--accent .panel__label {
  color: rgba(255, 255, 255, .72);
}

.panel__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
  color: var(--c-navy);
}

.panel--dark .panel__title,
.panel--accent .panel__title {
  color: var(--c-white);
}

.panel__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.panel--dark .panel__text,
.panel--accent .panel__text {
  color: rgba(255, 255, 255, .82);
}

/* ---------- 数据网格 / 数据条目 ---------- */

.data-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.data-grid--3 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .data-grid { grid-template-columns: repeat(4, 1fr); }
  .data-grid--3 { grid-template-columns: repeat(3, 1fr); }
}

.stat {
  padding: 16px 18px;
  border-left: 3px solid var(--c-accent);
  background: var(--c-white);
  box-shadow: 2px 2px 0 var(--c-line);
}

.stat__num {
  display: block;
  font-family: var(--font-head);
  font-size: 30px;
  line-height: 1;
  color: var(--c-navy);
}

.stat__label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.stat--invert {
  border-left-color: var(--c-accent);
  background: var(--c-navy);
}

.stat--invert .stat__num {
  color: var(--c-accent);
}

.stat--invert .stat__label {
  color: rgba(255, 255, 255, .52);
}

/* ---------- 索引列表 ---------- */

.index-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.index-list__item {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 12px 4px;
  border-bottom: 1px dashed var(--c-line);
}

.index-list__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-accent);
}

.index-list__body {
  flex: 1;
  min-width: 0;
}

.index-list__title {
  margin: 0 0 2px;
  font-weight: 700;
  color: var(--c-navy);
}

.index-list__meta {
  margin: 0;
  font-size: 13px;
  color: var(--c-muted);
}

/* ---------- 提示框 / 表格 / 元信息 ---------- */

.note-box {
  padding: 14px 18px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-accent);
  background: var(--c-white);
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.note-box--green {
  border-left-color: var(--c-green);
}

.note-box--red {
  border-left-color: var(--c-red);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--c-white);
}

.data-table th {
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-align: left;
  color: var(--c-muted);
  border-bottom: 2px solid var(--c-navy);
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink);
}

.data-table tbody tr:hover td {
  background: rgba(242, 140, 40, .05);
}

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

.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

.meta-line__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-line__item::before {
  content: "▪";
  font-size: 10px;
  color: var(--c-accent);
}

/* ---------- 斜切分隔线 ---------- */

.divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 40px 0;
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--c-line);
}

.divider::before { transform: skewX(-28deg); }
.divider::after { transform: skewX(28deg); }

/* ---------- 图片容器 ---------- */

.media {
  position: relative;
  overflow: hidden;
  background: var(--c-navy);
}

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

.media__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .45);
  background:
    linear-gradient(135deg, rgba(242, 140, 40, .08) 0, transparent 40%),
    linear-gradient(135deg, #0B1D3A, #16325A);
}

.media--16-9 .media__placeholder::before,
.media--4-3 .media__placeholder::before,
.media--1-1 .media__placeholder::before {
  content: "IMG";
}

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

.media[data-caption]::after {
  content: attr(data-caption);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 30px 12px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-white);
  background: linear-gradient(transparent, rgba(11, 29, 58, .82));
}

/* ============================================
   头部 · 侧边轨道 / 移动抽屉
   ============================================ */

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 2400;
  padding: 10px 18px;
  background: var(--c-accent);
  color: var(--c-navy);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  clip-path: var(--cut);
  transform: translateY(-160%);
  transition: transform .2s ease;
}

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

@media (min-width: 992px) {
  .skip-link { left: 70px; }
}

.site-header__bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 12px 0 16px;
  background: var(--c-navy);
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}

.site-header__bar .site-brand {
  transition: opacity .2s ease;
}

body.is-nav-open .site-header__bar .site-brand {
  opacity: 0;
}

@media (min-width: 992px) {
  .site-header__bar { display: none; }
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  line-height: 1;
  text-decoration: none;
}

.site-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  background: var(--c-accent);
  color: var(--c-navy);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}

.site-brand__name {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--c-white);
  white-space: nowrap;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .24);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--c-accent);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-white);
  transition: transform .22s ease, opacity .22s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  z-index: 1200;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: linear-gradient(180deg, #0B1D3A 0%, #10264A 100%);
  transform: translateX(-102%);
  transition: transform .28s ease;
}

.site-nav[data-open] {
  transform: translateX(0);
}

.site-nav::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--c-accent);
  transform: skewX(-24deg);
  transform-origin: left bottom;
}

.site-nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 64px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  text-decoration: none;
  flex-shrink: 0;
}

.site-nav__brand-txt {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  line-height: 1;
  transition: opacity .18s ease;
}

.site-nav__brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: rgba(255, 255, 255, .4);
  white-space: nowrap;
  text-transform: uppercase;
}

.site-nav__menu {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 10px 0;
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 22px;
  color: rgba(255, 255, 255, .72);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}

.site-nav__link:hover {
  background: rgba(255, 255, 255, .06);
  color: var(--c-white);
}

.site-nav__link[aria-current="page"] {
  background: rgba(242, 140, 40, .1);
  color: var(--c-accent);
}

.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 3px;
  background: var(--c-accent);
  transform: skewX(18deg);
}

.site-nav__icon {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  display: block;
  color: currentColor;
}

.site-nav__label {
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity .18s ease;
}

.site-nav__idx {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-accent);
  white-space: nowrap;
  transition: opacity .18s ease;
}

.site-nav__meta {
  flex-shrink: 0;
  padding: 12px 0 14px;
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.site-nav__actions {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 4px;
}

.site-nav__fave,
.site-nav__member {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 22px;
  background: transparent;
  border: 0;
  color: rgba(255, 255, 255, .68);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  border-radius: 2px;
  transition: background .18s ease, color .18s ease;
}

.site-nav__fave:hover,
.site-nav__member:hover {
  background: rgba(255, 255, 255, .06);
  color: var(--c-white);
}

.site-nav__fave svg,
.site-nav__member svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
}

.site-nav__fave[aria-pressed="true"] {
  color: var(--c-accent);
}

.site-nav__fave[aria-pressed="true"] svg {
  fill: rgba(242, 140, 40, .28);
}

.site-nav__stamp {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  padding: 0 22px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .38);
  white-space: nowrap;
  transition: opacity .18s ease;
}

.site-nav__stamp-label {
  text-transform: uppercase;
}

.site-nav__stamp-time {
  color: var(--c-accent);
  font-size: 12px;
}

.site-nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 1050;
  background: rgba(11, 29, 58, .5);
  opacity: 0;
  visibility: hidden;
  transition: opacity .28s ease, visibility .28s ease;
}

.site-nav-scrim[data-open] {
  opacity: 1;
  visibility: visible;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 2300;
  background: linear-gradient(90deg, var(--c-accent), #FFC178);
  pointer-events: none;
}

/* ---------- 桌面端侧边轨道 ---------- */

@media (min-width: 992px) {
  .site-nav {
    width: 64px;
    transform: none;
    transition: width .25s ease, box-shadow .25s ease;
  }

  .site-nav:hover,
  .site-nav:focus-within {
    width: 240px;
    box-shadow: 14px 0 30px rgba(11, 29, 58, .14);
  }

  .site-nav__brand-txt,
  .site-nav__label,
  .site-nav__idx,
  .site-nav__stamp {
    opacity: 0;
  }

  .site-nav:hover .site-nav__brand-txt,
  .site-nav:hover .site-nav__label,
  .site-nav:hover .site-nav__idx,
  .site-nav:hover .site-nav__stamp,
  .site-nav:focus-within .site-nav__brand-txt,
  .site-nav:focus-within .site-nav__label,
  .site-nav:focus-within .site-nav__idx,
  .site-nav:focus-within .site-nav__stamp {
    opacity: 1;
  }

  .site-nav-scrim {
    display: none;
  }

  .scroll-progress {
    left: 64px;
  }
}

/* ============================================
   页脚
   ============================================ */

.site-footer {
  position: relative;
  margin-top: 72px;
  background: linear-gradient(135deg, #0B1D3A 0%, #16325A 100%);
  color: var(--c-white);
  overflow: hidden;
  isolation: isolate;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .035) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, .035) 0 1px, transparent 1px 32px);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: -40px;
  right: 0;
  height: 8px;
  z-index: 0;
  background: var(--c-accent);
  transform: skewX(-30deg);
  transform-origin: top left;
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr .9fr .9fr 1.1fr;
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 32px 40px;
}

.site-footer__brand,
.site-footer__col {
  min-width: 0;
}

.site-footer__tagline {
  max-width: 420px;
  margin: 16px 0 12px;
  color: rgba(255, 255, 255, .74);
  font-size: 14px;
  line-height: 1.8;
}

.site-footer__mono {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .35);
}

.site-footer__head {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.site-footer__head::before {
  content: "// ";
}

.site-footer__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 9px;
}

.site-footer__list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.site-footer__list li::before {
  content: "▪";
  font-size: 10px;
  color: var(--c-accent);
  opacity: .7;
}

.site-footer__list a {
  color: rgba(255, 255, 255, .72);
  text-decoration: none;
  font-size: 14px;
  transition: color .15s ease;
}

.site-footer__list a:hover {
  color: var(--c-accent);
}

.site-footer__text {
  color: rgba(255, 255, 255, .6);
  font-size: 14px;
  line-height: 1.6;
}

.site-footer__service {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, .35);
}

.site-footer__bottom {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, .45);
}

@media (max-width: 991px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    padding: 48px 24px 36px;
  }
}

@media (max-width: 640px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    padding: 44px 20px 32px;
  }

  .site-footer__bottom {
    padding: 14px 20px;
  }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}