/* =============================================================
   K体育站 · 共享样式表 /assets/site.css
   设计语言：夜间赛场指挥中心 —— 战术板细线 / 报头刊头 / 数据带
   色彩：深渊墨绿底 + 赛场苔绿实色层 + 荧光青主交互 + 信号橙节点
   ============================================================= */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

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

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

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

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

table {
  border-collapse: collapse;
  width: 100%;
}

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩 */
  --c-void: #07110F;
  --c-coal: #101614;
  --c-turf: #173029;
  --c-glass: rgba(29, 48, 43, 0.72);
  --c-grey: #8A9994;
  --c-paper: #F2F7F4;
  --c-cyan: #35F2D0;
  --c-orange: #FF7A3D;
  --c-line: #2A4A42;
  --c-peach: #FFB08A;

  /* 字体 */
  --f-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --f-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺度 */
  --w-max: 1280px;
  --w-narrow: 780px;
  --gutter: clamp(16px, 4vw, 56px);
  --r-sm: 2px;

  /* 动效 */
  --t-fast: 160ms;
  --t-base: 240ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--c-void);
  background-image:
    radial-gradient(900px 460px at 12% -8%, rgba(53, 242, 208, 0.07), transparent 62%),
    radial-gradient(760px 420px at 92% 4%, rgba(255, 122, 61, 0.055), transparent 58%);
  background-repeat: no-repeat;
  background-attachment: scroll;
  color: var(--c-paper);
  font-family: var(--f-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--f-sans);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.12em;
  color: var(--c-paper);
}

h1 {
  font-size: clamp(30px, 5vw, 54px);
  letter-spacing: 0.06em;
  line-height: 1.14;
}

h2 {
  font-size: clamp(23px, 3.2vw, 34px);
}

h3 {
  font-size: clamp(18px, 2.1vw, 22px);
  letter-spacing: 0.08em;
}

h4 {
  font-size: 16px;
  letter-spacing: 0.1em;
}

p {
  font-size: 16px;
  line-height: 1.85;
}

a {
  transition: color var(--t-fast) var(--ease);
}

a:hover {
  color: var(--c-cyan);
}

.numeric {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--c-cyan);
  color: #04120F;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  border-radius: var(--r-sm);
  transform: translateY(-180%);
  transition: transform var(--t-fast) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  color: #04120F;
  outline: 2px solid var(--c-paper);
  outline-offset: 2px;
}

/* ---------- 5. 阅读进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 95;
  background: rgba(42, 74, 66, 0.55);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  transition: width 90ms linear;
}

/* ---------- 6. 共享头部 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background: linear-gradient(180deg, var(--c-coal), rgba(7, 17, 15, 0.94));
  border-bottom: 1px solid var(--c-line);
}

/* 6.1 战术细轨 */
.utility-bar {
  border-bottom: 1px solid var(--c-line);
  background: rgba(7, 17, 15, 0.5);
}

.utility-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 9px var(--gutter);
}

.utility-bar__label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1.4;
  color: var(--c-grey);
}

.utility-bar__dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 3px rgba(53, 242, 208, 0.16);
  animation: pulseDot 2.8s var(--ease) infinite;
}

@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(53, 242, 208, 0.16); }
  50% { box-shadow: 0 0 0 6px rgba(53, 242, 208, 0.05); }
}

.utility-bar__meta {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
}

.utility-bar__version {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  color: var(--c-peach);
  letter-spacing: 0.06em;
}

.utility-bar__link {
  color: var(--c-grey);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.utility-bar__link:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* 6.2 居中刊头 */
.masthead__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.masthead__inner::before,
.masthead__inner::after {
  content: "";
  position: absolute;
  top: 26%;
  bottom: 26%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--c-line) 25%, var(--c-line) 75%, transparent);
  pointer-events: none;
}

.masthead__inner::before { left: calc(var(--gutter) * 1.1); }
.masthead__inner::after { right: calc(var(--gutter) * 1.1); }

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: clamp(18px, 3vw, 30px) 0 clamp(14px, 2.2vw, 22px);
  text-align: center;
}

.brand__name {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(24px, 4.2vw, 40px);
  line-height: 1.1;
  letter-spacing: 0.24em;
  color: var(--c-paper);
  transition: color var(--t-base) var(--ease);
}

.brand:hover .brand__name {
  color: var(--c-cyan);
}

.brand__tagline {
  position: relative;
  font-family: var(--f-sans);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.3em;
  line-height: 1.6;
  color: var(--c-grey);
  padding-top: 10px;
}

.brand__tagline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 34px;
  height: 1px;
  background: var(--c-cyan);
  opacity: 0.85;
}

/* 6.3 移动目录按钮 */
.nav-toggle {
  display: none;
  position: absolute;
  top: 50%;
  right: var(--gutter);
  transform: translateY(-50%);
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(23, 48, 41, 0.72);
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  color: var(--c-paper);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

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

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 12px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform var(--t-base) var(--ease), opacity var(--t-fast) var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

.nav-toggle__label {
  display: inline-block;
}

/* 6.4 主导航 */
.site-nav {
  border-top: 1px solid var(--c-line);
  background: rgba(16, 22, 20, 0.62);
}

.site-nav__list {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  justify-content: center;
  gap: clamp(6px, 1.8vw, 28px);
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--c-line) transparent;
  -webkit-overflow-scrolling: touch;
}

.site-nav__list::-webkit-scrollbar {
  height: 4px;
}

.site-nav__list::-webkit-scrollbar-thumb {
  background: var(--c-line);
  border-radius: 4px;
}

.site-nav__item {
  flex: 0 0 auto;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 16px 4px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--c-grey);
  transition: color var(--t-fast) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-base) var(--ease);
}

.site-nav__link:hover {
  color: var(--c-paper);
}

.site-nav__link:hover::after {
  transform: scaleX(0.5);
}

.site-nav__link[aria-current="page"] {
  color: var(--c-cyan);
}

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

/* ---------- 7. 共享页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: linear-gradient(180deg, var(--c-coal), var(--c-void) 72%);
  border-top: 1px solid var(--c-line);
  color: var(--c-grey);
}

/* 7.1 宽幅数据带 */
.footer-band {
  position: relative;
  border-bottom: 1px solid var(--c-line);
  background:
    linear-gradient(90deg, rgba(53, 242, 208, 0.05), transparent 42%, rgba(255, 122, 61, 0.05));
}

.footer-band::before {
  content: "";
  display: block;
  height: 9px;
  background: repeating-linear-gradient(90deg, var(--c-line) 0 1px, transparent 1px 26px);
  opacity: 0.85;
}

.footer-band__list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-band__item {
  padding: clamp(18px, 2.6vw, 30px) clamp(10px, 2vw, 26px) clamp(18px, 2.6vw, 30px) 0;
  border-right: 1px solid var(--c-line);
}

.footer-band__item + .footer-band__item {
  padding-left: clamp(10px, 2vw, 26px);
}

.footer-band__item:last-child {
  border-right: 0;
}

.footer-band__num {
  display: block;
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.2vw, 36px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.footer-band__item:first-child .footer-band__num {
  color: var(--c-cyan);
}

.footer-band__label {
  display: block;
  margin-top: 7px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.6;
  color: var(--c-grey);
}

/* 7.2 品牌 + 栏目 */
.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.9fr);
  gap: clamp(28px, 5vw, 72px);
  max-width: var(--w-max);
  margin: 0 auto;
  padding: clamp(34px, 5vw, 62px) var(--gutter);
}

.footer-brand__name {
  display: inline-block;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(21px, 2.6vw, 28px);
  letter-spacing: 0.22em;
  line-height: 1.2;
  color: var(--c-paper);
  margin-bottom: 14px;
  transition: color var(--t-fast) var(--ease);
}

.footer-brand__name:hover {
  color: var(--c-cyan);
}

.footer-brand__summary {
  max-width: 34ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--c-grey);
}

.footer-brand__cta {
  margin-top: 24px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
}

.footer-col__title {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.22em;
  line-height: 1.4;
  color: var(--c-paper);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--c-line);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col__link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-grey);
  transition: color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.footer-col__link:hover {
  color: var(--c-cyan);
  transform: translateX(3px);
}

/* 7.3 法务底 */
.footer-base {
  border-top: 1px solid var(--c-line);
  background: rgba(7, 17, 15, 0.6);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px 40px;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: clamp(20px, 3vw, 32px) var(--gutter);
}

.footer-base__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  max-width: 720px;
}

.footer-base__contact-line {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-grey);
}

.footer-base__note {
  flex: 1 1 100%;
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--c-grey);
  opacity: 0.72;
}

.footer-base__legal {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-grey);
}

.footer-base__icp {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  color: var(--c-grey);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.footer-base__icp:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

.footer-base__copy {
  font-size: 12px;
  color: var(--c-grey);
}

.footer-base__copy [data-year] {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 8. 版式容器 ---------- */
.canvas {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.canvas--narrow {
  max-width: var(--w-narrow);
}

.section {
  padding-block: clamp(38px, 5.6vw, 82px);
}

.section + .section {
  border-top: 1px solid rgba(42, 74, 66, 0.5);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.24em;
  line-height: 1.6;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  flex: 0 0 auto;
  background: currentColor;
}

.lede {
  max-width: 60ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.9;
  color: var(--c-grey);
}

.quote {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(19px, 2.5vw, 27px);
  line-height: 1.72;
  letter-spacing: 0.04em;
  color: var(--c-paper);
  border-left: 2px solid var(--c-cyan);
  padding-left: clamp(16px, 2.4vw, 26px);
}

.display {
  font-family: var(--f-display);
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.16;
  color: var(--c-paper);
}

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-family: var(--f-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition:
    background-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}

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

.btn--primary {
  background: var(--c-cyan);
  color: #04120F;
}

.btn--primary:hover {
  background: #6BFFE4;
  color: #04120F;
}

.btn--signal {
  background: var(--c-orange);
  color: #1A0A02;
}

.btn--signal:hover {
  background: #FF9861;
  color: #1A0A02;
}

.btn--ghost {
  background: transparent;
  color: var(--c-paper);
  border-color: var(--c-line);
}

.btn--ghost:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

/* ---------- 10. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--c-grey);
}

.crumbs__sep {
  color: var(--c-line);
}

.crumbs a:hover {
  color: var(--c-cyan);
}

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

/* ---------- 11. 面板 ---------- */
.panel {
  background: var(--c-turf);
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  padding: clamp(18px, 2.6vw, 30px);
}

.panel--glass {
  background: var(--c-glass);
  border-color: rgba(53, 242, 208, 0.16);
  box-shadow: 0 20px 44px -26px rgba(0, 0, 0, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition:
    border-color var(--t-base) var(--ease),
    transform var(--t-base) var(--ease),
    box-shadow var(--t-base) var(--ease);
}

.panel--glass:hover {
  border-color: rgba(53, 242, 208, 0.44);
  transform: translateY(-2px);
  box-shadow: 0 26px 52px -26px rgba(0, 0, 0, 0.95), 0 0 0 1px rgba(53, 242, 208, 0.1);
}

/* ---------- 12. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

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

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

.grid--split {
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
}

/* ---------- 13. 图片容器基础 ---------- */
.figure-frame {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  background-color: var(--c-turf);
  background-image:
    repeating-linear-gradient(0deg, rgba(42, 74, 66, 0.45) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(42, 74, 66, 0.45) 0 1px, transparent 1px 34px),
    linear-gradient(135deg, #173029, #07110F);
}

.figure-frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(53, 242, 208, 0.16);
  pointer-events: none;
  z-index: 2;
}

.figure-frame > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

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

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

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

.figure-caption {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  line-height: 1.7;
  color: var(--c-grey);
}

/* ---------- 14. 滚动显现 ---------- */
html.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 460ms var(--ease), transform 460ms var(--ease);
}

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

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .masthead__inner::before,
  .masthead__inner::after {
    display: none;
  }

  .site-nav {
    display: none;
    border-top: 1px solid var(--c-line);
    background: var(--c-coal);
  }

  .site-nav[data-open] {
    display: block;
    animation: navDrop 200ms var(--ease) both;
  }

  .site-nav__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    padding: 4px var(--gutter) 14px;
    overflow: visible;
  }

  .site-nav__item {
    width: 100%;
  }

  .site-nav__link {
    padding: 14px 0 14px 14px;
    border-bottom: 1px solid rgba(42, 74, 66, 0.45);
    border-left: 2px solid transparent;
    font-size: 14px;
  }

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

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--c-cyan);
    background: rgba(53, 242, 208, 0.06);
  }

  .site-nav__item:last-child .site-nav__link {
    border-bottom: 0;
  }
}

@keyframes navDrop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 800px) {
  .grid--2,
  .grid--3,
  .grid--split {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

  .footer-band__item:nth-child(2n) {
    border-right: 0;
  }

  .footer-band__item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--c-line);
  }
}

@media (max-width: 560px) {
  .utility-bar__inner {
    padding-block: 8px;
  }

  .utility-bar__label {
    letter-spacing: 0.14em;
  }

  .utility-bar__meta {
    gap: 12px;
    letter-spacing: 0.1em;
  }

  .brand {
    padding-block: 16px 12px;
  }

  .brand__tagline {
    letter-spacing: 0.2em;
    font-size: 10.5px;
  }

  .footer-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .footer-col__list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px 18px;
  }

  .footer-base__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn {
    width: 100%;
  }

  .footer-brand__cta {
    width: auto;
  }
}

/* ---------- 16. 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  html.has-reveal [data-reveal],
  html.has-reveal [data-reveal].is-revealed {
    opacity: 1 !important;
    transform: none !important;
  }

  .scroll-progress {
    display: none;
  }

  .panel--glass:hover,
  .footer-col__link:hover {
    transform: none;
  }
}

@media print {
  .skip-link,
  .scroll-progress,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: #FFFFFF;
    color: #07110F;
  }
}