/* ==========================================================================
   米兰赛场 · 共享站点样式 /assets/site.css
   夜场记分台：红黑骨架 + 青黄电流 + 等宽数字层级
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 色板 */
  --ink: #0B0D10;
  --red: #C8102E;
  --red-deep: #7A0A1C;
  --cyan: #2DE2E6;
  --acid: #E6FF3F;
  --paper: #F5EFE3;
  --paper-line: #D9D0C0;
  --panel: #2A2D34;
  --orange: #FF7A1A;
  --white: #FFFFFF;

  /* 语义色 */
  --bg: var(--ink);
  --fg: var(--paper);
  --fg-dim: rgba(245, 239, 227, 0.64);
  --line: rgba(245, 239, 227, 0.16);
  --line-strong: rgba(245, 239, 227, 0.34);
  --focus: var(--acid);

  /* 结构 */
  --rail-w: 282px;
  --gutter: clamp(18px, 4vw, 44px);
  --rule: 3px;
  --rule-thick: 5px;
  --maxw: 1360px;

  /* 字体（仅本地字体栈） */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-condensed: "DIN Condensed", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* 字级：数字远高于文案 */
  --fs-score: clamp(48px, 9vw, 120px);
  --fs-h1: clamp(32px, 4.6vw, 56px);
  --fs-h2: clamp(22px, 2.6vw, 30px);
  --fs-body: 16px;
  --fs-small: 14px;
  --fs-note: 12.5px;
  --fs-mono: 12px;

  /* 动效 */
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 0.2s;

  /* 阴影 */
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, 0.55);
  --shadow-red: 7px 7px 0 rgba(200, 16, 46, 0.38);
  --shadow-cyan: 7px 7px 0 rgba(45, 226, 230, 0.3);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 夜场灯光与球场刻线 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1100px 560px at 86% -12%, rgba(45, 226, 230, 0.10), transparent 62%),
    radial-gradient(900px 520px at -6% 108%, rgba(200, 16, 46, 0.20), transparent 66%),
    repeating-linear-gradient(90deg, rgba(245, 239, 227, 0.035) 0 1px, transparent 1px 68px);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  font-family: var(--font-condensed);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.005em;
  text-wrap: balance;
}

p { margin: 0 0 1em; text-wrap: pretty; }

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

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
a:hover { color: var(--acid); }

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

button { font: inherit; color: inherit; }

strong, b { font-weight: 700; }

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

::selection {
  background: var(--red);
  color: var(--white);
}

#main-content {
  position: relative;
  z-index: 1;
  display: block;
  scroll-margin-top: 130px;
}

/* ---------- 3. 工具类 ---------- */
.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;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.stack > * + * { margin-top: var(--stack-gap, 18px); }

/* ---------- 4. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(212px, 1fr)); }

.grid--editorial {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
  grid-template-columns: minmax(0, 1fr);
}
.grid--split {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 900px) {
  .grid--split { grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); }
}
@media (min-width: 1024px) {
  .grid--editorial { grid-template-columns: 220px minmax(0, 1fr); }
}

/* ---------- 5. 按钮 ---------- */
.btn {
  --btn-bg: var(--red);
  --btn-fg: var(--white);
  --btn-bd: var(--red);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-bd);
  border-radius: 2px;
  font-family: var(--font-condensed);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.06em;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn:hover {
  color: var(--btn-fg);
  transform: translate(-2px, -2px);
  box-shadow: 9px 9px 0 rgba(0, 0, 0, 0.6);
}
.btn:active {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.6);
}

.btn--primary {
  --btn-bg: var(--red);
  --btn-bd: var(--red);
  --btn-fg: var(--white);
}
.btn--primary:hover { --btn-bg: #E01434; --btn-bd: #E01434; }

.btn--ghost {
  --btn-bg: transparent;
  --btn-bd: var(--line-strong);
  --btn-fg: var(--paper);
  box-shadow: none;
}
.btn--ghost:hover {
  --btn-bg: transparent;
  --btn-bd: var(--cyan);
  --btn-fg: var(--cyan);
  color: var(--cyan);
  box-shadow: none;
}

.btn--acid {
  --btn-bg: var(--acid);
  --btn-bd: var(--acid);
  --btn-fg: var(--ink);
}
.btn--acid:hover { color: var(--ink); }

/* ---------- 6. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.breadcrumbs a {
  color: var(--fg-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.breadcrumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.breadcrumbs__sep { color: var(--red); font-weight: 700; }
.breadcrumbs__current { color: var(--paper); }

/* ---------- 7. 通用排版元件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--red);
}

.panel {
  background: rgba(42, 45, 52, 0.6);
  border: var(--rule) solid var(--line);
  padding: clamp(18px, 2.4vw, 28px);
}
.panel--paper {
  background: var(--paper);
  color: #14161A;
  border-color: var(--paper-line);
}
.panel--paper a { color: var(--red-deep); }
.panel--paper a:hover { color: var(--red); }
.panel--paper h2,
.panel--paper h3 { color: #14161A; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper);
  white-space: nowrap;
}
.tag--live { border-color: var(--acid); color: var(--acid); }
.tag--cyan { border-color: var(--cyan); color: var(--cyan); }
.tag--red { border-color: var(--red); background: var(--red); color: var(--white); }

.num {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
}
.num--score { font-size: var(--fs-score); color: var(--acid); }
.num--idx {
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

/* ---------- 8. 图片容器基础规则 ---------- */
.media {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: var(--rule) solid var(--line-strong);
}
.media--red { border-color: var(--red); box-shadow: var(--shadow-red); }
.media--cyan { border-color: var(--cyan); box-shadow: var(--shadow-cyan); }

.media > img,
.media > svg,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x10 { aspect-ratio: 16 / 10; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }

.media__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  line-height: 1.6;
  letter-spacing: 0.16em;
  color: var(--paper);
  background:
    repeating-linear-gradient(90deg, rgba(245, 239, 227, 0.08) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(0deg, rgba(245, 239, 227, 0.08) 0 1px, transparent 1px 40px),
    linear-gradient(150deg, rgba(200, 16, 46, 0.42), rgba(11, 13, 16, 0.92));
}

.media__badge {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  z-index: 2;
  padding: 6px 10px;
  background: var(--red);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.media__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
}

/* ---------- 9. 头部：夜场比分条框架 ---------- */
.skip-link {
  position: fixed;
  inset-block-start: 12px;
  inset-inline-start: 12px;
  z-index: 999;
  padding: 12px 18px;
  background: var(--acid);
  color: var(--ink);
  border: 2px solid var(--ink);
  font-family: var(--font-condensed);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  color: var(--ink);
}

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 60;
  background: var(--ink);
  border-bottom: var(--rule) solid var(--red);
}

.scroll-meter {
  position: absolute;
  inset-inline: 0;
  inset-block-end: calc(var(--rule) * -1);
  height: 3px;
  background: rgba(245, 239, 227, 0.12);
  overflow: hidden;
  pointer-events: none;
}
.scroll-meter__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

.site-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px 14px;
  padding: 12px var(--gutter) 14px;
}

/* 品牌锁定 */
.brand {
  grid-column: 1;
  grid-row: 1;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--paper);
  text-decoration: none;
}
.brand:hover { color: var(--paper); }

.brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--red);
  border: 2px solid var(--paper);
}
.brand__mark::before {
  content: "";
  width: 12px;
  height: 12px;
  background: var(--acid);
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset-block-end: -3px;
  inset-inline-end: -3px;
  width: 10px;
  height: 10px;
  background: var(--cyan);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.brand__name {
  font-family: var(--font-condensed);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.05em;
  color: var(--paper);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  line-height: 1.3;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand__tagline {
  grid-column: 1 / -1;
  grid-row: 2;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.18em;
  color: var(--red);
}

/* 移动端菜单按钮 */
.nav-toggle {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: transparent;
  color: var(--paper);
  border: 2px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 20px;
  height: 12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease),
              bottom var(--dur) var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.site-header[data-open] .nav-toggle {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
}
.site-header[data-open] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { bottom: 5px; transform: rotate(-45deg); }

.nav-toggle__label { line-height: 1; }

/* 主导航（移动端折叠） */
.site-nav {
  grid-column: 1 / -1;
  grid-row: 3;
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.3s var(--ease), visibility 0s linear 0.3s;
}
.site-header[data-open] .site-nav {
  grid-template-rows: 1fr;
  visibility: visible;
  transition: grid-template-rows 0.3s var(--ease), visibility 0s linear 0s;
}
.site-nav__list {
  overflow: hidden;
  min-height: 0;
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--paper);
  font-family: var(--font-condensed);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.site-nav__list > li:first-child .site-nav__link { border-top: 1px solid var(--line); }

.site-nav__link::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 3px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: center top;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.site-nav__link:hover {
  background: rgba(245, 239, 227, 0.07);
  color: var(--paper);
}
.site-nav__link:hover::before { transform: scaleY(1); }

.site-nav__link[aria-current="page"] {
  background: var(--red);
  color: var(--white);
}
.site-nav__link[aria-current="page"]:hover {
  background: var(--red);
  color: var(--white);
}
.site-nav__link[aria-current="page"]::before {
  transform: scaleY(1);
  background: var(--acid);
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--acid); }

.site-nav__label { min-width: 0; }

/* 快捷入口 */
.utility {
  grid-column: 1 / -1;
  grid-row: 4;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.utility__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.utility__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.utility__link {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.utility__link:hover {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.site-header__cta {
  grid-column: 1 / -1;
  grid-row: 5;
  display: none;
}

/* ---------- 10. 页脚：深色记分板 ---------- */
.site-footer {
  position: relative;
  z-index: 2;
  margin-top: clamp(48px, 8vw, 110px);
  background: linear-gradient(180deg, #191C22 0%, var(--panel) 100%);
  border-top: var(--rule-thick) solid var(--red);
  color: var(--paper);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(34px, 4.4vw, 64px) var(--gutter) clamp(26px, 3vw, 42px);
}

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

.site-footer__name {
  margin: 0 0 10px;
  font-family: var(--font-condensed);
  font-size: 26px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.05em;
  color: var(--paper);
}
.site-footer__note {
  margin: 0 0 14px;
  max-width: 34ch;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--paper);
}
.site-footer__update {
  display: inline-block;
  margin: 0;
  padding: 6px 10px;
  border: 1px dashed var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

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

.site-footer__heading {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--acid);
}

.site-footer__list {
  display: grid;
  gap: 10px;
}
.site-footer__list a {
  display: inline-block;
  color: var(--paper);
  font-size: var(--fs-small);
  line-height: 1.6;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.site-footer__list a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.site-footer__address {
  margin: 0 0 12px;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.95;
  letter-spacing: 0.02em;
  color: var(--paper);
  word-break: break-word;
}
.site-footer__service {
  margin: 0;
  max-width: 42ch;
  font-size: 12px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
}
.site-footer__base p { margin: 0; }

.site-footer__copy { text-transform: uppercase; }

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
.site-footer__legal a {
  color: var(--fg-dim);
  text-decoration: none;
}
.site-footer__legal a:hover { color: var(--cyan); }

.site-footer__icp {
  color: var(--paper-line);
  letter-spacing: 0.06em;
}

/* ---------- 11. 滚动渐显 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.has-js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 12. 平板与桌面 ---------- */
@media (min-width: 760px) {
  .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__brand { grid-column: 1 / -1; }
}

@media (min-width: 1080px) {
  body { padding-inline-start: var(--rail-w); }

  #main-content { scroll-margin-top: 24px; }

  .site-header {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    inset-block-start: 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    border-bottom: 0;
    border-inline-end: var(--rule) solid var(--red);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .scroll-meter {
    inset-block-end: 0;
    height: 4px;
  }

  .site-header__inner {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-height: 0;
    padding: 26px 20px 24px;
  }

  .brand { grid-column: auto; grid-row: auto; gap: 12px; }

  .brand__tagline {
    grid-column: auto;
    grid-row: auto;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px dashed var(--line);
  }

  .nav-toggle { display: none; }

  .site-nav {
    grid-column: auto;
    grid-row: auto;
    display: block;
    visibility: visible;
    margin-top: 22px;
    transition: none;
  }
  .site-nav__list { overflow: visible; }

  .site-nav__link {
    display: grid;
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 10px;
    padding: 12px 10px;
    border-top: 1px solid var(--line);
    border-bottom: 0;
    font-size: 16px;
  }
  .site-nav__list > li:first-child .site-nav__link { border-top: 1px solid var(--line); }
  .site-nav__list > li:last-child .site-nav__link { border-bottom: 1px solid var(--line); }

  .utility {
    grid-column: auto;
    grid-row: auto;
    margin-top: auto;
    padding-top: 26px;
  }
  .utility__list { flex-direction: column; gap: 6px; }
  .utility__link { display: block; text-align: center; }

  .site-header__cta {
    display: inline-flex;
    grid-column: auto;
    grid-row: auto;
    width: 100%;
    margin-top: 14px;
    padding-inline: 10px;
    font-size: 14px;
  }

  .site-footer__inner {
    grid-template-columns: 1.6fr 0.9fr 0.9fr 1.45fr;
    align-items: start;
  }
  .site-footer__brand { grid-column: auto; }
  .site-footer__icp { margin-inline-start: auto; }
}

@media (max-width: 559px) {
  .site-footer__base { gap: 10px 16px; }
  .site-footer__legal { gap: 14px; }
  .site-footer__icp { margin-inline-start: 0; }
}

/* ---------- 13. 减少动态偏好 ---------- */
@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;
  }

  .has-js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .site-nav { transition: none; }
}