/* 博万体育 · 全站共享样式 /assets/site.css */

:root {
  --color-paper: #F5F2E9;
  --color-ink: #1F1F1F;
  --color-green: #2F6D3A;
  --color-blue: #1E88C7;
  --color-gold: #C9A227;
  --color-hada: #8AB8E6;
  --color-gray: #E3E0D5;
  --color-deep-green: #1B4D2E;
  --color-white: #FFFFFF;

  --font-headline: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Songti SC", "SimSun", "STSong", serif;
  --font-index: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --header-width: 280px;
  --content-max: 1200px;
  --radius: 2px;
  --radius-lg: 6px;
  --shadow-card: 4px 4px 0 rgba(31, 31, 31, 0.09);
  --scroll-progress: 0;
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  background-color: var(--color-paper);
  background-image:
    linear-gradient(rgba(31, 31, 31, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 31, 31, 0.026) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

body.nav-lock {
  overflow: hidden;
}

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

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

a:hover {
  color: var(--color-green);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  line-height: 1.2;
  font-weight: 800;
  color: var(--color-ink);
}

h1 {
  font-size: clamp(32px, 5vw, 48px);
  letter-spacing: -0.015em;
}

h2 {
  font-size: clamp(24px, 3.4vw, 32px);
}

h3 {
  font-size: clamp(20px, 2.4vw, 24px);
}

ul,
ol {
  padding-left: 1.4em;
}

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

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

[hidden] {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 容器与网格 */

.container {
  width: min(var(--content-max), 100%);
  margin-inline: auto;
  padding-inline: clamp(20px, 4.5vw, 56px);
}

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

.grid {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: 1fr;
}

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

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 700px) and (max-width: 1023.98px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 章节体系 */

.section {
  padding-block: clamp(48px, 8vw, 96px);
}

.section + .section {
  border-top: 1px solid var(--color-gray);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 16px 24px;
  margin-bottom: clamp(24px, 5vw, 48px);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-blue);
}

.section-kicker::before {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--color-gold);
}

.section-title {
  margin-top: 10px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 900;
}

.section-desc {
  margin-top: 10px;
  max-width: 36em;
  color: #625F56;
  font-size: 15px;
}

.section-index {
  display: block;
  font-family: var(--font-index);
  font-size: clamp(64px, 9vw, 112px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.05em;
  user-select: none;
  color: rgba(47, 109, 58, 0.18);
  pointer-events: none;
}

@supports (-webkit-text-stroke: 1px black) {
  .section-index {
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(47, 109, 58, 0.5);
  }
}

/* 页首介绍 */

.page-intro {
  padding-block: clamp(40px, 7vw, 88px) clamp(24px, 5vw, 48px);
  border-bottom: 3px double var(--color-gray);
  margin-bottom: clamp(24px, 5vw, 48px);
}

.page-intro-meta {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-blue);
}

.page-intro-title {
  margin-top: 12px;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-intro-desc {
  margin-top: 16px;
  max-width: 40em;
  color: #625F56;
}

/* 面包屑 */

.breadcrumb {
  margin-bottom: 20px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 0;
}

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

.breadcrumb li + li::before {
  content: "→";
  margin-inline: 8px;
  font-family: var(--font-index);
  font-size: 12px;
  color: var(--color-gold);
}

.breadcrumb a {
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
  color: var(--color-green);
}

.breadcrumb [aria-current="page"] {
  color: var(--color-ink);
  font-weight: 700;
}

/* 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border: 2px solid var(--color-green);
  border-radius: var(--radius);
  background: var(--color-green);
  color: var(--color-white);
  font-family: var(--font-headline);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: var(--color-deep-green);
  border-color: var(--color-deep-green);
  color: var(--color-paper);
}

.btn:active {
  transform: translateY(1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-green);
}

.btn-outline:hover {
  background: rgba(47, 109, 58, 0.08);
  color: var(--color-green);
}

.btn-gold {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-ink);
}

.btn-gold:hover {
  background: #A9871B;
  border-color: #A9871B;
  color: var(--color-white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 12px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 28px;
}

/* 数据卡片 */

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: 6px 6px 0 rgba(31, 31, 31, 0.12);
  transform: translate(-1px, -1px);
}

.card-label {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-blue);
}

.card-title {
  font-size: 20px;
  font-weight: 800;
  margin-top: 2px;
}

.card-text {
  font-size: 14px;
  color: #625F56;
}

.card-num {
  font-family: var(--font-index);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-gold);
}

.card-meta {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--color-gray);
  font-family: var(--font-index);
  font-size: 12px;
  color: #625F56;
}

/* 标签 */

.label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-index);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.08em;
}

.label-green {
  color: var(--color-green);
  background: rgba(47, 109, 58, 0.08);
}

.label-blue {
  color: var(--color-blue);
  background: rgba(30, 136, 199, 0.08);
}

.label-gold {
  color: var(--color-ink);
  background: var(--color-gold);
  border-color: var(--color-gold);
}

.label-dark {
  color: var(--color-paper);
  background: var(--color-deep-green);
  border-color: var(--color-deep-green);
}

/* 表格 */

.table-wrap {
  overflow-x: auto;
  background: var(--color-white);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius);
}

.table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.table th,
.table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-gray);
}

.table th {
  background: var(--color-deep-green);
  color: var(--color-paper);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

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

.table tbody tr:hover td {
  background: rgba(47, 109, 58, 0.06);
}

.table td.num {
  font-family: var(--font-index);
  font-weight: 700;
  color: var(--color-gold);
}

/* 图片容器 */

.figure-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-gray), var(--color-hada));
  border: 1px solid var(--color-gray);
  border-radius: var(--radius);
}

.figure-frame--wide {
  aspect-ratio: 21 / 9;
}

.figure-frame--portrait {
  aspect-ratio: 3 / 4;
}

.figure-frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  z-index: 1;
  border: 1px dashed rgba(31, 31, 31, 0.28);
  pointer-events: none;
}

.figure-frame::after {
  content: attr(data-caption);
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  max-width: 100%;
  padding: 6px 12px;
  background: var(--color-ink);
  color: var(--color-paper);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.figure-frame:not([data-caption])::after,
.figure-frame[data-caption=""]::after {
  display: none;
}

.figure-frame img {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 色带与斜切 */

.band {
  position: relative;
  padding: clamp(20px, 4vw, 36px);
  color: var(--color-paper);
  background: var(--color-green);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
}

.band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  border-top: 26px solid var(--color-paper);
  border-right: 26px solid transparent;
}

.band--blue {
  background: linear-gradient(135deg, var(--color-blue), #155E8C);
}

.band--ink {
  background: var(--color-ink);
}

.band--gold {
  background: linear-gradient(135deg, var(--color-gold), #A9871B);
  color: var(--color-ink);
}

.band-title {
  font-family: var(--font-headline);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
}

.band-text {
  margin-top: 8px;
  font-size: 14px;
  opacity: 0.9;
}

.slant {
  position: relative;
  margin-block: clamp(16px, 3vw, 28px);
  padding-block: clamp(48px, 7vw, 80px);
  background: var(--color-ink);
  color: var(--color-paper);
  clip-path: polygon(0 0, 100% 2.2%, 100% 97.8%, 0 100%);
}

.slant--green {
  background: linear-gradient(120deg, var(--color-deep-green), var(--color-green));
}

.slant--blue {
  background: linear-gradient(120deg, #12496A, var(--color-blue));
}

.slant-title {
  font-family: var(--font-headline);
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 900;
}

/* 图例与坐标 */

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding: 14px 18px;
  background: var(--color-white);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius);
  font-family: var(--font-index);
  font-size: 12px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-green);
}

.legend-dot--blue {
  background: var(--color-blue);
}

.legend-dot--gold {
  background: var(--color-gold);
}

.legend-dot--ink {
  background: var(--color-ink);
}

.legend-dot--paper {
  background: var(--color-paper);
  border: 1px solid var(--color-gray);
}

.coord {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-blue);
}

.coord::before {
  content: "◈";
  color: var(--color-gold);
  font-size: 14px;
}

/* 路线列表 */

.route-list {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--color-gray);
}

.route-item {
  display: grid;
  grid-template-columns: 3.2em 1fr auto;
  gap: 12px 16px;
  align-items: center;
  padding: 14px 8px;
  border-bottom: 1px solid var(--color-gray);
  font-size: 14px;
}

.route-item:hover {
  background: rgba(47, 109, 58, 0.05);
}

.route-index {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-blue);
}

.route-arrow {
  font-family: var(--font-index);
  color: var(--color-gold);
}

/* 其他基础组件 */

.divider {
  border: 0;
  border-top: 1px solid var(--color-gray);
  margin-block: 32px;
}

.divider--double {
  border-top: 3px double var(--color-gray);
}

.data-value {
  font-family: var(--font-index);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: var(--color-gold);
}

.data-unit {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-blue);
}

.prose {
  max-width: 42em;
}

.prose p + p {
  margin-top: 1.2em;
}

.prose strong {
  color: var(--color-deep-green);
  font-weight: 700;
}

.prose em {
  color: var(--color-blue);
}

.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;
}

/* ===== 头部 ===== */

.site-header {
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  z-index: 560;
  background: linear-gradient(135deg, var(--color-deep-green), #132F20);
  color: var(--color-paper);
  border-bottom: 2px solid var(--color-gold);
}

.header-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 600;
  width: 100vw;
  height: 3px;
  pointer-events: none;
}

.header-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-green) 55%, var(--color-blue));
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: 0 50%;
  will-change: transform;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 66px;
  padding: 0 16px;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 900;
  padding: 10px 16px;
  background: var(--color-gold);
  color: var(--color-ink);
  font-family: var(--font-headline);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand-lockup:hover {
  color: inherit;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border: 2px solid var(--color-gold);
  border-radius: var(--radius);
  background: rgba(201, 162, 39, 0.08);
  color: var(--color-gold);
  font-family: var(--font-index);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-text {
  display: block;
  line-height: 1.25;
}

.brand-name {
  display: block;
  font-family: var(--font-headline);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--color-paper);
}

.brand-tagline {
  display: block;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-hada);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid rgba(245, 242, 233, 0.35);
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-paper);
  font-family: var(--font-headline);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

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

.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-gold);
  background: rgba(201, 162, 39, 0.12);
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.nav-toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

.nav-toggle-text {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.site-nav {
  position: fixed;
  top: 66px;
  right: 0;
  bottom: 0;
  z-index: 540;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  width: min(340px, 86vw);
  padding: 24px 20px 28px;
  background: linear-gradient(160deg, var(--color-deep-green), #122A1D);
  border-left: 3px solid var(--color-gold);
  box-shadow: -16px 0 40px rgba(31, 31, 31, 0.32);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(102%);
  visibility: hidden;
  transition: transform 0.3s ease, visibility 0.3s ease;
}

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

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 520;
  background: rgba(31, 31, 31, 0.45);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.site-nav[data-open] ~ .nav-backdrop {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.nav-list {
  list-style: none;
  padding: 0;
  counter-reset: nav;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  counter-increment: nav;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 10px 12px 26px;
  border-left: 3px solid transparent;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  color: rgba(245, 242, 233, 0.8);
  font-family: var(--font-headline);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-link::before {
  content: "0" counter(nav);
  min-width: 2.2em;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-gold);
  opacity: 0.7;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-paper);
}

.nav-link[aria-current="page"] {
  color: var(--color-paper);
  border-left-color: var(--color-gold);
  background: linear-gradient(90deg, rgba(201, 162, 39, 0.16), rgba(255, 255, 255, 0.03));
}

.nav-link[aria-current="page"]::before {
  opacity: 1;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: -2px;
}

.header-foot {
  border-top: 1px solid rgba(245, 242, 233, 0.16);
  padding-top: 16px;
}

.header-trust {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--color-hada);
}

.header-phone {
  margin-top: 4px;
  font-family: var(--font-index);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--color-gold);
}

@media (max-width: 479px) {
  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 12px;
  }
  .brand-name {
    font-size: 17px;
    letter-spacing: 0.04em;
  }
  .brand-tagline {
    font-size: 10px;
    letter-spacing: 0.1em;
  }
  .nav-toggle-text {
    display: none;
  }
  .nav-toggle {
    padding: 8px;
  }
}

@media (min-width: 1024px) {
  body {
    padding-left: var(--header-width);
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--header-width);
    border-bottom: 0;
    border-right: 3px solid var(--color-green);
    background: linear-gradient(165deg, var(--color-deep-green) 0%, var(--color-deep-green) 62%, #12301F 100%);
  }

  .site-header::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 14px;
    width: 1px;
    background: repeating-linear-gradient(to bottom, rgba(245, 242, 233, 0.28) 0 5px, transparent 5px 12px);
    pointer-events: none;
  }

  .header-inner {
    height: auto;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 8px;
    padding: 34px 20px 4px 30px;
  }

  .brand-lockup {
    padding-left: 8px;
  }

  .nav-toggle {
    display: none;
  }

  .nav-backdrop {
    display: none;
  }

  .site-nav {
    position: static;
    top: auto;
    right: auto;
    bottom: auto;
    z-index: auto;
    width: auto;
    flex: 1;
    margin-top: 8px;
    padding: 12px 14px 24px 30px;
    gap: 32px;
    background: transparent;
    border-left: 0;
    box-shadow: none;
    transform: none;
    visibility: visible;
    overflow-y: visible;
    transition: none;
  }

  .site-nav[data-open] {
    transform: none;
    visibility: visible;
  }

  .header-foot {
    margin-top: auto;
  }
}

/* ===== 页脚 ===== */

.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  border-top: 4px solid var(--color-gold);
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.10), transparent 45%), var(--color-deep-green);
  color: rgba(245, 242, 233, 0.82);
}

.footer-inner {
  padding-block: clamp(40px, 7vw, 72px) 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr;
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.6fr 1.1fr 1fr;
  }
}

.footer-brand,
.footer-contact,
.footer-links {
  display: flex;
  flex-direction: column;
}

.footer-brand-name {
  font-family: var(--font-headline);
  font-size: 28px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--color-paper);
}

.footer-tagline {
  margin-top: 4px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-hada);
}

.footer-trust {
  margin-top: 12px;
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-gold);
}

.footer-heading {
  margin-bottom: 14px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.footer-meta,
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
  padding: 0;
}

.footer-meta li {
  font-size: 14px;
  line-height: 1.6;
}

.footer-nav a {
  border-bottom: 1px solid transparent;
  color: rgba(245, 242, 233, 0.82);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-nav a::before {
  content: "→";
  margin-right: 6px;
  color: var(--color-hada);
}

.footer-nav a:hover {
  color: var(--color-paper);
  border-bottom-color: var(--color-gold);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  margin-top: clamp(32px, 5vw, 48px);
  padding-top: 20px;
  border-top: 1px solid rgba(245, 242, 233, 0.16);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(245, 242, 233, 0.5);
}

.footer-copy {
  margin: 0;
}

.footer-icp {
  margin: 0;
}

.footer-note {
  flex-basis: 100%;
  margin-top: 4px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(245, 242, 233, 0.45);
}