/* =====================================================
   凯运主赛场 / assets/site.css
   共享样式：设计变量 / 重置 / 头部 / 页脚 / 通用组件
   ===================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --green: #2D7D46;
  --green-deep: #23703D;
  --red: #C23B3B;
  --red-deep: #A93232;
  --gray: #8A8D8F;
  --gray-light: #B9BDC0;
  --yellow: #E8F04C;
  --teal: #0B3D3A;
  --teal-light: #145A55;
  --wine: #6E1423;
  --purple: #3E2F5B;
  --light: #F5F5F0;
  --dark: #1A1D1F;
  --dark-light: #24282B;
  --white: #FFFFFF;

  --font-title: "Alibaba PuHuiTi", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", "Roboto Mono", Consolas, "Menlo", monospace;
  --font-serif: "Source Serif", "Songti SC", SimSun, Georgia, serif;

  --container: 1240px;
  --container-wide: 1440px;
  --topbar-h: 42px;
  --header-h: 64px;
  --radius: 3px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
}

/* ---------- 重置与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  overflow-x: clip;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--light);
  background-color: var(--dark);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  font-family: var(--font-title);
  font-weight: 800;
  line-height: 1.2;
  color: var(--light);
}

p { margin: 0 0 1em; }

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

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

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

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

button {
  background: none;
  border: 0;
  cursor: pointer;
}

::selection {
  background: var(--yellow);
  color: var(--dark);
}

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

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

/* ---------- 辅助跳转 ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 2000;
  background: var(--yellow);
  color: var(--dark);
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  padding: 14px 22px;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: top var(--transition);
}

.skip-link:focus {
  top: 16px;
  outline: 3px solid var(--dark);
  outline-offset: 3px;
}

.main-content {
  min-height: 60vh;
}

#main-content:focus {
  outline: none;
}

/* ---------- 布局容器 ---------- */
.container,
.container--wide {
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
}

.container {
  max-width: var(--container);
}

.container--wide {
  max-width: var(--container-wide);
}

/* ---------- 滚动进度条 ---------- */
.site-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 1200;
  pointer-events: none;
}

.site-scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--yellow) 50%, var(--red));
  box-shadow: 0 0 8px rgba(232, 240, 76, 0.55);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* =====================================================
   头部：双层信息导航
   ===================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--dark);
  box-shadow: var(--shadow);
}

/* 第一层：品牌说明、搜索、语言 */
.site-header__top {
  position: relative;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  border-bottom: 1px solid rgba(245, 245, 240, 0.08);
}

.site-header__top::before {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 88px;
  height: 2px;
  background: var(--yellow);
  opacity: 0.85;
}

.site-header__top-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  min-height: var(--topbar-h);
  padding: 6px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-header__tagline {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(245, 245, 240, 0.78);
}

.site-header__tagline::before {
  content: '';
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  background: var(--yellow);
  border-radius: 1px;
  vertical-align: 2px;
  box-shadow: 0 0 6px rgba(232, 240, 76, 0.6);
}

.site-header__tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-header__search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 10px 0 9px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(245, 245, 240, 0.18);
  border-radius: 4px;
  transition: border-color var(--transition), background var(--transition);
}

.site-header__search:focus-within {
  border-color: var(--yellow);
  background: rgba(0, 0, 0, 0.45);
}

.site-header__search-icon {
  position: relative;
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  border: 2px solid rgba(245, 245, 240, 0.55);
  border-radius: 50%;
}

.site-header__search-icon::after {
  content: '';
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 6px;
  height: 2px;
  background: rgba(245, 245, 240, 0.55);
  border-radius: 1px;
  transform: rotate(45deg);
}

.site-header__search-input {
  width: 148px;
  padding: 0;
  background: transparent;
  border: 0;
  font-size: 13px;
  color: var(--light);
  -webkit-appearance: none;
  appearance: none;
}

.site-header__search-input::placeholder {
  color: rgba(245, 245, 240, 0.45);
}

.site-header__search-input:focus {
  outline: none;
}

.site-header__search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
}

.site-header__lang {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  background: rgba(232, 240, 76, 0.12);
  border: 1px solid rgba(232, 240, 76, 0.45);
  border-radius: 3px;
  font-family: var(--font-title);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--yellow);
}

/* 第二层：品牌与主导航 */
.site-header__main {
  position: relative;
  border-bottom: 3px solid var(--red);
}

.site-header__main::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 180px;
  height: 100%;
  background: repeating-linear-gradient(
    -55deg,
    transparent 0 14px,
    rgba(232, 240, 76, 0.045) 14px 16px,
    transparent 16px 32px
  );
  pointer-events: none;
}

.site-header__main-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 0 24px;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 24px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  flex: 0 0 auto;
}

.site-header__brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(145deg, var(--red), var(--red-deep));
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 800;
  line-height: 1;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  box-shadow: 0 2px 10px rgba(194, 59, 59, 0.4);
}

.site-header__brand-mark::after {
  content: '';
  position: absolute;
  top: 3px;
  right: 3px;
  width: 6px;
  height: 6px;
  background: var(--yellow);
  clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-header__brand-name {
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.03em;
  color: var(--light);
}

.site-header__brand-name em {
  font-style: normal;
  color: var(--red);
  transition: color var(--transition);
}

.site-header__brand:hover .site-header__brand-name em {
  color: var(--yellow);
}

.site-header__brand-eng {
  padding-left: 10px;
  border-left: 1px solid rgba(138, 141, 143, 0.45);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  line-height: 1;
  color: var(--gray);
  text-transform: uppercase;
}

.site-header__nav {
  display: flex;
  align-items: stretch;
}

.site-header__nav-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  height: 100%;
}

.site-header__nav-item {
  display: flex;
  align-items: stretch;
}

.site-header__nav-link {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 22px;
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: rgba(245, 245, 240, 0.85);
  transition: color var(--transition), background var(--transition);
}

.site-header__nav-link::before {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 6px solid var(--yellow);
  opacity: 0;
  transition: opacity var(--transition);
}

.site-header__nav-link:hover {
  color: var(--light);
  background: linear-gradient(180deg, transparent, rgba(45, 125, 70, 0.28));
}

.site-header__nav-link:hover::before {
  opacity: 1;
}

.site-header__nav-link[aria-current="page"] {
  background: linear-gradient(180deg, var(--red), var(--red-deep));
  color: var(--white);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

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

.site-header__nav-link[aria-current="page"]:focus-visible {
  outline-offset: -3px;
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  position: relative;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin: 8px 0;
  padding: 10px;
  border: 1px solid rgba(245, 245, 240, 0.25);
  border-radius: 4px;
  background: rgba(245, 245, 240, 0.04);
  transition: border-color var(--transition), background var(--transition);
}

.nav-toggle:hover {
  border-color: var(--yellow);
  background: rgba(232, 240, 76, 0.08);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--light);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

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

.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);
  background: var(--yellow);
}

/* =====================================================
   页脚：色带 + 信息网格 + 数据声明 + 备案底栏
   ===================================================== */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--teal), #082D2B);
  color: var(--light);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 380px;
  height: 100%;
  background: repeating-linear-gradient(
    -55deg,
    transparent 0 20px,
    rgba(232, 240, 76, 0.035) 20px 22px,
    transparent 22px 48px
  );
  pointer-events: none;
}

.site-footer__band {
  height: 4px;
  background: linear-gradient(90deg, var(--yellow) 0 22%, var(--red) 22% 48%, var(--green) 48% 74%, var(--gray) 74% 100%);
}

.site-footer__grid {
  position: relative;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 56px 24px 44px;
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 56px;
}

.site-footer__logo {
  margin: 0;
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--light);
}

.site-footer__logo em {
  font-style: normal;
  color: var(--yellow);
}

.site-footer__eng {
  margin: 10px 0 18px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--gray);
  text-transform: uppercase;
}

.site-footer__about {
  max-width: 460px;
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(245, 245, 240, 0.74);
}

.site-footer__title {
  position: relative;
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(245, 245, 240, 0.14);
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--yellow);
  text-transform: uppercase;
}

.site-footer__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 40px;
  height: 2px;
  background: var(--red);
}

.site-footer__links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 2px 0 2px 18px;
  font-size: 14px;
  color: rgba(245, 245, 240, 0.82);
  transition: color var(--transition), transform var(--transition);
}

.site-footer__links a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  background: var(--red);
  border-radius: 1px;
  transform: translateY(-50%) rotate(45deg);
  transition: background var(--transition);
}

.site-footer__links a:hover {
  color: var(--yellow);
  transform: translateX(4px);
}

.site-footer__links a:hover::before {
  background: var(--yellow);
}

.site-footer__contact p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(245, 245, 240, 0.82);
}

.site-footer__icp {
  display: inline-block;
  margin-top: 6px;
  padding: 3px 10px;
  border: 1px solid rgba(138, 141, 143, 0.5);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.site-footer__trust {
  padding: 14px 0;
  background: var(--dark);
  border-top: 1px solid rgba(245, 245, 240, 0.08);
}

.site-footer__trust p {
  margin: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.site-footer__trust p::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  background: var(--yellow);
  border-radius: 1px;
  vertical-align: 2px;
}

.site-footer__bottom {
  padding: 16px 0;
  background: var(--dark);
  border-top: 1px solid rgba(245, 245, 240, 0.06);
}

.site-footer__bottom-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
}

.site-footer__bottom p {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--gray);
}

.site-footer__bottom [data-year] {
  font-family: var(--font-mono);
  color: var(--light);
}

.site-footer__note {
  text-align: right;
}

/* =====================================================
   通用组件
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border: 1px solid var(--gray);
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--light);
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  border-color: var(--yellow);
  color: var(--yellow);
}

.btn--primary {
  border-color: var(--red);
  background: var(--red);
  color: var(--white);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.btn--primary:hover {
  border-color: var(--red-deep);
  background: var(--red-deep);
  color: var(--white);
  box-shadow: 0 6px 22px rgba(194, 59, 59, 0.4);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--green);
  background: rgba(45, 125, 70, 0.08);
  color: var(--light);
}

.btn--ghost:hover {
  border-color: var(--yellow);
  background: rgba(45, 125, 70, 0.18);
  color: var(--yellow);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gray);
  text-transform: uppercase;
}

.section-label::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--red);
  flex: 0 0 auto;
}

.section-label strong {
  color: var(--yellow);
  font-weight: 700;
}

.section-title {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--light);
}

.section-lead {
  max-width: 640px;
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245, 245, 240, 0.76);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 18px 0;
  font-size: 13px;
  color: var(--gray);
}

.breadcrumb a {
  color: var(--gray);
  transition: color var(--transition);
}

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

.breadcrumb__sep {
  font-family: var(--font-mono);
  color: var(--red);
}

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

.panel {
  position: relative;
  background: rgba(26, 29, 31, 0.72);
  border: 1px solid rgba(138, 141, 143, 0.35);
  border-radius: var(--radius);
  padding: 28px;
}

.panel::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 24px;
  width: 42px;
  height: 3px;
  background: var(--red);
}

.panel--clip {
  border: 0;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.panel--green {
  background: rgba(45, 125, 70, 0.85);
  border-color: transparent;
}

.panel--teal {
  background: rgba(11, 61, 58, 0.92);
  border-color: transparent;
}

.panel--wine {
  background: rgba(110, 20, 35, 0.9);
  border-color: transparent;
}

.score-number,
.data-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.score-number {
  font-weight: 700;
  color: var(--yellow);
}

.track-line {
  position: relative;
}

.track-line::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 48%;
  height: 100%;
  background: repeating-linear-gradient(
    -55deg,
    transparent 0 16px,
    rgba(232, 240, 76, 0.06) 16px 18px,
    transparent 18px 40px
  );
  pointer-events: none;
}

.speed-line {
  position: relative;
}

.speed-line::after {
  content: '';
  position: absolute;
  top: 36%;
  right: -24px;
  width: 160px;
  height: 2px;
  background: var(--red);
  transform: rotate(-16deg);
  opacity: 0.45;
  pointer-events: none;
}

.shot-frame {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(135deg, var(--teal), var(--dark));
  aspect-ratio: 16 / 10;
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.shot-frame::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  background: repeating-linear-gradient(
    -55deg,
    transparent 0 18px,
    rgba(232, 240, 76, 0.05) 18px 20px,
    transparent 20px 40px
  );
  mix-blend-mode: screen;
  pointer-events: none;
}

.shot-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.22, 0.7, 0.3, 1);
}

.shot-frame:hover img {
  transform: scale(1.04);
}

.shot-frame__label {
  position: absolute;
  left: 0;
  bottom: 14px;
  z-index: 2;
  padding: 5px 14px 5px 18px;
  background: var(--red);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

/* ---------- 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  will-change: opacity, transform;
}

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

/* =====================================================
   响应式
   ===================================================== */
@media (max-width: 1180px) {
  .site-header__nav-link {
    padding: 0 15px;
    font-size: 14px;
  }

  .site-header__search-input {
    width: 120px;
  }

  .site-footer__grid {
    gap: 40px;
  }
}

@media (max-width: 900px) {
  .site-header__top-inner {
    min-height: 36px;
  }

  .site-header__main-inner {
    min-height: 58px;
    gap: 12px;
  }

  .site-header__brand-mark {
    width: 36px;
    height: 36px;
    font-size: 17px;
  }

  .site-header__brand-name {
    font-size: 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1200;
    display: none;
    flex-direction: column;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    background: var(--dark);
    border-bottom: 3px solid var(--red);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.45);
  }

  .site-header__nav[data-open] {
    display: flex;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0 14px;
  }

  .site-header__nav-item {
    border-bottom: 1px solid rgba(245, 245, 240, 0.06);
  }

  .site-header__nav-link {
    width: 100%;
    height: 48px;
    padding: 0 24px;
    justify-content: space-between;
    font-size: 15px;
  }

  .site-header__nav-link::before {
    display: none;
  }

  .site-header__nav-link::after {
    content: '›';
    font-family: var(--font-mono);
    font-size: 18px;
    color: var(--red);
  }

  .site-header__nav-link[aria-current="page"] {
    background: linear-gradient(90deg, var(--red), rgba(194, 59, 59, 0.55) 55%, transparent);
    clip-path: none;
  }

  .site-header__nav-link[aria-current="page"]::after {
    color: var(--yellow);
  }

  .site-header__nav-link[aria-current="page"]:focus-visible {
    outline-offset: 2px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    padding: 44px 24px 36px;
  }

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

@media (max-width: 700px) {
  .site-header__tagline {
    display: none;
  }

  .site-header__top-inner {
    justify-content: flex-end;
  }

  .container,
  .container--wide {
    padding: 0 20px;
  }
}

@media (max-width: 600px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    padding: 36px 20px 28px;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-footer__note {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .site-header__main-inner {
    padding: 0 16px;
  }

  .site-header__top-inner {
    padding: 4px 16px;
  }

  .site-header__search {
    display: none;
  }

  .site-header__brand-text {
    gap: 3px;
  }

  .site-header__brand-name {
    font-size: 19px;
  }

  .site-header__brand-eng {
    display: none;
  }

  .site-header__brand-mark {
    width: 34px;
    height: 34px;
    font-size: 16px;
  }
}

/* ---------- 动效偏好 ---------- */
@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;
  }

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