/* =====================================================================
   多宝体育APP CN · Site Kit 共享样式 /assets/site.css
   ===================================================================== */

:root {
  --color-primary: #0D1B2A;
  --color-primary-light: #1B3A5C;
  --color-accent: #D4AF37;
  --color-accent-light: #F0D77B;
  --color-accent-red: #C0392B;
  --color-bg: #F7F3E8;
  --color-bg-alt: #EFE9D9;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6B6B;
  --color-border: #D1C7B8;

  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Serif SC', 'Songti SC', 'STSong', serif;

  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;

  --header-h: 72px;
  --rail-w: 44px;

  --shadow-sm: 0 2px 10px rgba(13, 27, 42, 0.07);
  --shadow-md: 0 10px 28px rgba(13, 27, 42, 0.13);
  --shadow-lg: 0 20px 52px rgba(13, 27, 42, 0.2);

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

/* ---------- 基础重置 ---------- */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

article, aside, footer, header, nav, section, main {
  display: block;
}

ul[class], ol[class] {
  list-style: none;
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 88% 12%, rgba(212, 175, 55, 0.08) 0, transparent 280px),
    radial-gradient(ellipse at 8% 78%, rgba(27, 58, 92, 0.06) 0, transparent 320px);
  padding-top: var(--header-h);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

::selection {
  background: var(--color-primary);
  color: var(--color-bg);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 标题与正文 ---------- */

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.3;
  color: var(--color-primary);
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.4rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.25rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.05rem;
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--color-primary-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 跳过链接 ---------- */

.skip-link {
  position: fixed;
  top: 8px;
  left: 50%;
  transform: translateX(-50%) translateY(-180%);
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  white-space: nowrap;
  z-index: 2200;
  box-shadow: 0 6px 20px rgba(13, 27, 42, 0.35);
  transition: transform 0.3s var(--ease);
}

.skip-link:focus {
  transform: translateX(-50%) translateY(0);
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background-color 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--gold {
  background: linear-gradient(135deg, #E7C75B, var(--color-accent));
  color: var(--color-primary);
  box-shadow: 0 4px 18px rgba(212, 175, 55, 0.32);
}

.btn--gold:hover {
  background: linear-gradient(135deg, #EDD47E, #D4AF37);
  box-shadow: 0 10px 28px rgba(212, 175, 55, 0.45);
}

.btn--dark {
  background: var(--color-primary);
  color: var(--color-bg);
}

.btn--dark:hover {
  background: var(--color-primary-light);
  box-shadow: 0 10px 28px rgba(13, 27, 42, 0.28);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(13, 27, 42, 0.3);
  color: var(--color-primary);
}

.btn--ghost:hover {
  border-color: var(--color-accent-red);
  color: var(--color-accent-red);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 14px 30px;
  font-size: 1rem;
}

/* ---------- 头部框架 ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
  z-index: 1200;
  box-shadow: 0 4px 24px rgba(13, 27, 42, 0.25);
}

.site-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  pointer-events: none;
  z-index: 5;
}

.site-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-red));
  border-radius: 0 3px 3px 0;
  transition: width 0.12s linear;
}

.site-header__bar {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-bg);
  text-decoration: none;
  flex-shrink: 0;
}

.site-brand__mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, #E9CB6D 0%, var(--color-accent) 60%, #B8962E 100%);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  box-shadow: 0 4px 14px rgba(212, 175, 55, 0.35);
  overflow: hidden;
}

.site-brand__mark::after {
  content: '';
  position: absolute;
  top: -60%;
  left: -20%;
  width: 60%;
  height: 220%;
  background: linear-gradient(110deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.1) 100%);
  transform: rotate(18deg);
  transition: transform 0.7s var(--ease);
  pointer-events: none;
}

.site-brand:hover .site-brand__mark::after {
  transform: rotate(18deg) translateX(250%);
}

.site-brand__name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.22rem;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--color-bg);
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.site-nav__item {
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: rgba(247, 243, 232, 0.78);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.25s, background-color 0.25s;
}

.site-nav__link:hover {
  color: var(--color-bg);
  background: rgba(212, 175, 55, 0.14);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(212, 175, 55, 0.13);
}

.site-nav__link[aria-current="page"]::after {
  opacity: 1;
}

.site-nav__footer {
  display: none;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.site-header__cta {
  flex-shrink: 0;
}

.site-nav-toggle {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid rgba(247, 243, 232, 0.28);
  border-radius: 14px;
  background: transparent;
}

.site-nav-toggle__box {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.site-nav-toggle__bar {
  display: block;
  height: 2px;
  width: 16px;
  border-radius: 2px;
  background: var(--color-bg);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.site-nav-toggle__text {
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 700;
  line-height: 1.4;
  color: rgba(247, 243, 232, 0.85);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.site-rail {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  background: var(--color-primary);
  border-right: 1px solid rgba(212, 175, 55, 0.28);
  z-index: 1100;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.site-rail::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-accent) 0%, rgba(212, 175, 55, 0.12) 40%, transparent 90%);
  opacity: 0.6;
}

.site-rail::after {
  content: '';
  position: absolute;
  bottom: 28px;
  left: 50%;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--color-accent);
  transform: translateX(-50%) rotate(45deg);
}

.site-rail__text {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.38em;
  color: rgba(247, 243, 232, 0.62);
  white-space: nowrap;
}

/* ---------- 页脚框架 ---------- */

.site-footer {
  position: relative;
  background: var(--color-primary);
  color: rgba(247, 243, 232, 0.78);
  border-top: 3px solid var(--color-accent);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(135deg, rgba(212, 175, 55, 0.03) 0 20px, transparent 20px 44px),
    radial-gradient(circle at 85% 0%, rgba(212, 175, 55, 0.1) 0, transparent 300px);
  pointer-events: none;
}

.site-footer__main {
  position: relative;
  display: grid;
  grid-template-columns: 1.6fr 1.2fr 1fr;
  gap: 40px 56px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px 48px;
}

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

.site-footer__trust {
  margin-top: 18px;
  max-width: 30em;
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(247, 243, 232, 0.65);
}

.site-footer__heading {
  margin-bottom: 18px;
  padding-bottom: 10px;
  position: relative;
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-footer__heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

.site-footer__links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
  list-style: none;
}

.site-footer__links a {
  display: inline-block;
  color: rgba(247, 243, 232, 0.72);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.25s, transform 0.25s;
}

.site-footer__links a:hover {
  color: var(--color-accent);
  transform: translateX(3px);
}

.site-footer__col--contact {
  background: rgba(212, 175, 55, 0.06);
  border: 1px solid rgba(212, 175, 55, 0.16);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
}

.site-footer__contact-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 14px;
}

.site-footer__contact-line:last-child {
  margin-bottom: 0;
}

.site-footer__contact-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(212, 175, 55, 0.7);
}

.site-footer__contact-value {
  font-size: 0.9rem;
  color: rgba(247, 243, 232, 0.88);
  word-break: break-all;
}

.site-footer__bottom {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid rgba(247, 243, 232, 0.1);
}

.site-footer__copyright,
.site-footer__icp {
  font-size: 0.85rem;
  color: rgba(247, 243, 232, 0.55);
}

.site-footer__top {
  position: fixed;
  right: 24px;
  bottom: 28px;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-accent);
  z-index: 1150;
  box-shadow: 0 10px 28px rgba(13, 27, 42, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s, background-color 0.3s var(--ease), color 0.3s var(--ease);
}

.site-footer__top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-footer__top:hover {
  background: var(--color-accent);
  color: var(--color-primary);
}

.site-footer__top-icon {
  font-size: 1.2rem;
  line-height: 1;
}

/* ---------- 容器 / 章节 / 面包屑 ---------- */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--space-5) 0;
}

.chapter {
  position: relative;
  padding: var(--space-6) 0;
}

.chapter__num {
  position: absolute;
  top: 8px;
  left: -4px;
  z-index: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(6rem, 15vw, 11rem);
  line-height: 1;
  color: var(--color-primary-light);
  opacity: 0.08;
  pointer-events: none;
  user-select: none;
}

.chapter__head {
  position: relative;
  z-index: 1;
  margin-bottom: var(--space-4);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--color-primary);
}

.eyebrow::before {
  content: '';
  width: 26px;
  height: 3px;
  border-radius: 3px;
  background: var(--color-accent-red);
}

.breadcrumb {
  padding: 16px 0;
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.84rem;
  color: var(--color-text-muted);
}

.breadcrumb__item a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb__item a:hover {
  color: var(--color-accent-red);
}

.breadcrumb__item--current {
  color: var(--color-primary);
  font-weight: 700;
}

.breadcrumb__sep {
  color: var(--color-border);
}

/* ---------- 栅格 ---------- */

.grid {
  display: grid;
  gap: var(--space-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));
}

/* ---------- 卡片 ---------- */

.card {
  padding: var(--space-3);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.card--hover:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.card__title {
  margin-bottom: 8px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.card__body {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ---------- 标签 ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
}

.tag--gold {
  background: var(--color-accent-light);
  border-color: #DDBB55;
  color: var(--color-primary);
}

.tag--red {
  background: rgba(192, 57, 43, 0.09);
  border-color: rgba(192, 57, 43, 0.3);
  color: var(--color-accent-red);
}

.tag--dark {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-bg);
}

/* ---------- 图例 ---------- */

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  padding: 16px 20px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text);
}

.legend__dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}

.legend__dot--red {
  background: var(--color-accent-red);
}

.legend__dot--dark {
  background: var(--color-primary-light);
}

/* ---------- 数据指标 ---------- */

.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat__num {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-primary);
}

.stat__label {
  padding-left: 10px;
  border-left: 3px solid var(--color-accent-red);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ---------- 坐标索引 ---------- */

.coordinate {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 4px 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.coordinate:last-child {
  border-bottom: none;
}

.coordinate__index {
  grid-row: span 2;
  padding-right: 14px;
  border-right: 2px solid var(--color-accent);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.3rem;
  line-height: 1.3;
  color: var(--color-primary);
}

.coordinate__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-primary);
}

.coordinate__desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* ---------- 图片占位容器 ---------- */

.img-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(212, 175, 55, 0.14) 0%, transparent 50%),
    var(--color-primary-light);
}

.img-frame--wide {
  aspect-ratio: 16 / 9;
}

.img-frame--square {
  aspect-ratio: 1 / 1;
}

.img-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, rgba(247, 243, 232, 0.08) 0 2px, transparent 2px 18px);
  pointer-events: none;
}

.img-frame__placeholder {
  position: relative;
  color: rgba(247, 243, 232, 0.75);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* ---------- 速度线分隔带 ---------- */

.rule-speed {
  height: 5px;
  margin: var(--space-4) 0;
  border: none;
  border-radius: 4px;
  background: repeating-linear-gradient(
    115deg,
    var(--color-accent) 0 12px,
    transparent 12px 26px,
    var(--color-accent-red) 26px 34px,
    transparent 34px 52px
  );
  opacity: 0.32;
}

/* ---------- 滚动显现 ---------- */

[data-reveal].is-pending {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal].is-pending[data-reveal-delay="1"] {
  transition-delay: 0.15s;
}

[data-reveal].is-pending[data-reveal-delay="2"] {
  transition-delay: 0.3s;
}

[data-reveal].is-pending[data-reveal-delay="3"] {
  transition-delay: 0.45s;
}

/* ---------- 响应式 ---------- */

@media (min-width: 961px) {
  body {
    padding-left: var(--rail-w);
  }
}

@media (max-width: 960px) {
  :root {
    --header-h: 64px;
  }

  .site-header__bar {
    padding: 0 16px;
  }

  .site-header__actions {
    margin-left: auto;
  }

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

  .site-rail {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 16px 20px 24px;
    background: var(--color-primary);
    border-top: 1px solid rgba(212, 175, 55, 0.35);
    border-bottom: 3px solid var(--color-accent);
    box-shadow: 0 24px 48px rgba(13, 27, 42, 0.4);
    transform: translateY(-14px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.35s var(--ease), visibility 0.35s;
  }

  .site-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    padding: 13px 16px;
    border-radius: 14px;
    border-left: 3px solid transparent;
    font-size: 1rem;
  }

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

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--color-accent);
  }

  .site-nav__footer {
    display: block;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(247, 243, 232, 0.14);
  }

  .site-nav__footer .btn {
    width: 100%;
  }

  .site-footer__main {
    grid-template-columns: 1fr 1fr;
    gap: 32px 40px;
    padding-top: 48px;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }

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

@media (max-width: 640px) {
  .section {
    padding: var(--space-4) 0;
  }

  .site-footer__main {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 36px;
  }

  .site-footer__bottom {
    padding: 18px 16px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .container,
  .site-header__bar {
    padding-left: 16px;
    padding-right: 16px;
  }
}

@media (max-width: 480px) {
  .site-header__cta {
    display: none;
  }

  .site-brand__name {
    font-size: 0.92rem;
  }

  .site-brand__mark {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    font-size: 0.92rem;
  }

  .site-footer__top {
    right: 16px;
    bottom: 20px;
    width: 44px;
    height: 44px;
  }
}

/* ---------- 减弱动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
    transition-delay: 0s !important;
  }

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

  .site-brand:hover .site-brand__mark::after {
    transform: rotate(18deg);
  }

  .btn:hover,
  .card--hover:hover,
  .site-footer__links a:hover {
    transform: none;
  }
}