/* ============================================================
   /assets/site.css — 宝威体育赛事 共享外壳与通用组件
   深墨蓝 + 雪峰白 + 晨曦金 / 堆叠画板 / 等宽索引
   ============================================================ */

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

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

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

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

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

button { font: inherit; color: inherit; background: none; border: 0; }

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

[hidden] { display: none !important; }

/* ---------- 变量 ---------- */
:root {
  --ink: #0B1B33;
  --ink-2: #14345F;
  --gold: #F2B441;
  --gold-soft: #FFC857;
  --paper: #F7F5F0;
  --teal: #1E9E8F;
  --red: #C0392B;
  --stone: #C9CED6;
  --data: #6B7887;
  --deep: #060F1E;
  --glacier: #7FB2D9;

  --r-panel: 28px;
  --r-card: 20px;
  --r-pill: 999px;

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-18: 18px;
  --fs-22: 22px;
  --fs-28: 28px;
  --fs-36: 36px;
  --fs-48: 48px;
  --fs-64: 64px;

  --sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono",
          Menlo, Consolas, "Liberation Mono", monospace;

  --shell: min(1240px, 100% - 48px);
  --header-h: 66px;
}

/* ---------- 基础排版 ---------- */
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.012em;
  color: var(--ink);
}

h1 { font-size: clamp(30px, 4.4vw, 48px); }
h2 { font-size: clamp(24px, 2.8vw, 34px); }
h3 { font-size: var(--fs-22); font-weight: 800; }
h4 { font-size: var(--fs-18); font-weight: 800; }

p { max-width: 42em; }

small { font-size: var(--fs-12); }

.mono {
  font-family: var(--mono);
  letter-spacing: 0.06em;
  font-size: 0.94em;
}

.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;
}

/* ---------- 焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

.panel--ink :focus-visible,
.site-footer :focus-visible,
.site-header :focus-visible {
  outline-color: var(--gold);
}

.site-nav:focus { outline: none; }

#main-content { display: block; scroll-margin-top: calc(var(--header-h) + 20px); }

/* ---------- 布局容器 ---------- */
.container { width: var(--shell); margin-inline: auto; }
.container--narrow { width: min(880px, 100% - 48px); margin-inline: auto; }

.section { padding-block: clamp(36px, 5vw, 72px); }

.grid { display: grid; gap: clamp(16px, 2vw, 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, 1.35fr) minmax(0, 1fr); align-items: start; }

/* ============================================================
   页头
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  isolation: isolate;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid rgba(247, 245, 240, 0.1);
  transition: box-shadow 0.25s ease;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    repeating-linear-gradient(112deg,
      rgba(127, 178, 217, 0.11) 0 1px,
      transparent 1px 26px),
    radial-gradient(120% 180% at 88% -40%, rgba(242, 180, 65, 0.16), transparent 60%);
}

.site-header.is-condensed {
  box-shadow: 0 14px 30px -20px rgba(6, 15, 30, 0.9);
}

.header-inner {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 18px;
  width: var(--shell);
  margin-inline: auto;
  padding-block: 12px;
  transition: padding-block 0.25s ease;
}

.site-header.is-condensed .header-inner { padding-block: 8px; }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: 100%;
  z-index: 5;
  padding: 10px 18px;
  border-radius: 0 0 14px 14px;
  background: var(--gold);
  color: var(--ink);
  font-weight: 800;
  font-size: var(--fs-14);
  transform: translateY(-160%);
  transition: transform 0.18s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--ink);
  outline-offset: -4px;
}

/* ---------- 滚动进度 ---------- */
.header-scroll {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(247, 245, 240, 0.08);
  pointer-events: none;
  z-index: 4;
}

.header-scroll > span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gold), var(--teal));
  transition: width 0.12s linear;
}

/* ---------- 品牌 ---------- */
.brand-cluster {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-peak {
  flex: 0 0 auto;
  width: 26px;
  height: 24px;
  background: linear-gradient(155deg, var(--gold) 8%, #F8D38A 52%, var(--teal) 100%);
  clip-path: polygon(50% 0, 100% 100%, 62% 100%, 50% 62%, 38% 100%, 0 100%);
  filter: drop-shadow(0 2px 6px rgba(242, 180, 65, 0.35));
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  min-width: 0;
}

.brand-name {
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: #FFFFFF;
  white-space: nowrap;
}

.brand-sub {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(247, 245, 240, 0.55);
  text-transform: uppercase;
  white-space: nowrap;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--gold);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  white-space: nowrap;
  transition: background 0.18s ease, transform 0.18s ease;
}

.version-badge:hover { background: var(--gold-soft); transform: translateY(-1px); }

.version-badge__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink);
  opacity: 0.5;
}

/* ---------- 栏目导航 ---------- */
.site-nav {
  display: flex;
  justify-content: flex-end;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  counter-reset: nav-index;
}

.nav-list > li { counter-increment: nav-index; }

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 13px;
  border-radius: var(--r-pill);
  font-size: 14.5px;
  font-weight: 500;
  color: rgba(247, 245, 240, 0.78);
  white-space: nowrap;
  transition: background 0.18s ease, color 0.18s ease;
}

.nav-link::before {
  content: counter(nav-index, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.08em;
  color: rgba(242, 180, 65, 0.72);
  transform: translateY(-3px);
}

.nav-link:hover {
  background: rgba(247, 245, 240, 0.1);
  color: #FFFFFF;
}

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

.nav-link[aria-current="page"]::before { color: rgba(11, 27, 51, 0.55); }

/* ---------- 头部快捷动作 ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease,
              border-color 0.18s ease, transform 0.18s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

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

.btn--ghost {
  border-color: rgba(247, 245, 240, 0.36);
  color: var(--paper);
}
.btn--ghost:hover {
  background: rgba(247, 245, 240, 0.12);
  border-color: rgba(247, 245, 240, 0.65);
}

.btn--ink { background: var(--ink); color: var(--paper); }
.btn--ink:hover { background: var(--ink-2); }

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

/* ---------- 移动开合按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border: 1px solid rgba(247, 245, 240, 0.32);
  border-radius: var(--r-pill);
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.nav-toggle:hover { background: rgba(247, 245, 240, 0.1); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background 0.18s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s ease;
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 遮罩 ---------- */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  background: rgba(6, 15, 30, 0.62);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.site-header[data-open] .nav-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--deep);
  color: rgba(247, 245, 240, 0.82);
  padding: clamp(48px, 6vw, 76px) 0 26px;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(105deg,
      rgba(127, 178, 217, 0.08) 0 1px,
      transparent 1px 34px),
    radial-gradient(90% 120% at 12% 0%, rgba(30, 158, 143, 0.16), transparent 60%),
    radial-gradient(70% 90% at 96% 10%, rgba(242, 180, 65, 0.12), transparent 62%);
}

.footer-inner {
  position: relative;
  width: var(--shell);
  margin-inline: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.45fr 1fr 1.15fr;
  gap: 40px 52px;
  padding-bottom: 34px;
  border-bottom: 1px solid rgba(247, 245, 240, 0.13);
}

.footer-brand__name {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: #FFFFFF;
  max-width: none;
}

.footer-region {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.75;
  max-width: 32ch;
  color: rgba(247, 245, 240, 0.7);
}

.footer-version {
  display: inline-flex;
  align-items: center;
  margin-top: 18px;
  padding: 5px 13px;
  border: 1px solid rgba(242, 180, 65, 0.45);
  border-radius: var(--r-pill);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
  max-width: none;
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(247, 245, 240, 0.46);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 18px;
}

.footer-link {
  display: inline-block;
  padding: 2px 0;
  font-size: 14.5px;
  color: rgba(247, 245, 240, 0.82);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer-link:hover {
  color: var(--gold);
  border-bottom-color: rgba(242, 180, 65, 0.6);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 12px;
}

.contact-item__label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: rgba(247, 245, 240, 0.44);
}

.contact-item__value {
  font-size: 15px;
  color: var(--paper);
  word-break: break-word;
}

.footer-note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(247, 245, 240, 0.52);
}

.footer-note .footer-link { font-size: 12.5px; color: var(--gold); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 26px;
  padding-top: 22px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(247, 245, 240, 0.46);
}

.footer-legal,
.footer-copy { max-width: none; }

.footer-legal .footer-link { font-size: 11.5px; letter-spacing: 0.06em; }

/* ============================================================
   通用内容组件
   ============================================================ */
/* 堆叠画板 */
.panel {
  position: relative;
  padding: clamp(22px, 3vw, 44px);
  border: 1px solid rgba(11, 27, 51, 0.08);
  border-radius: var(--r-panel);
  background: #FFFFFF;
  box-shadow: 0 20px 44px -36px rgba(6, 15, 30, 0.85);
}

.panel--paper { background: var(--paper); }

.panel--lift { box-shadow: 0 32px 64px -40px rgba(6, 15, 30, 0.7); }

.panel--ink {
  background: var(--ink);
  color: rgba(247, 245, 240, 0.86);
  border-color: rgba(247, 245, 240, 0.12);
}

.panel--ink h1,
.panel--ink h2,
.panel--ink h3,
.panel--ink h4 { color: #FFFFFF; }

.panel--ink .section-index { color: rgba(247, 245, 240, 0.55); }

/* 章节索引条 */
.section-head { display: flex; flex-direction: column; gap: 10px; }

.section-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--data);
}

.section-index::after {
  content: "";
  width: 46px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.section-title { font-size: clamp(24px, 2.8vw, 34px); }

.section-lead {
  max-width: 40em;
  font-size: var(--fs-16);
  color: var(--data);
}

.panel--ink .section-lead { color: rgba(247, 245, 240, 0.72); }

/* 卡片 */
.card {
  padding: 22px;
  border: 1px solid rgba(11, 27, 51, 0.08);
  border-radius: var(--r-card);
  background: #FFFFFF;
}

/* 胶囊标签 */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: rgba(11, 27, 51, 0.07);
  color: var(--ink-2);
}

.pill--gold { background: var(--gold); color: var(--ink); }
.pill--teal { background: rgba(30, 158, 143, 0.16); color: #0F6F64; }
.pill--red { background: rgba(192, 57, 43, 0.14); color: #9C2A20; }
.pill--outline {
  background: transparent;
  border: 1px solid var(--stone);
  color: var(--data);
}

/* 数据块 */
.stat { display: flex; flex-direction: column; gap: 4px; }

.stat__num {
  font-family: var(--mono);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.stat__label { font-size: 13px; color: var(--data); }
.panel--ink .stat__num { color: var(--gold); }
.panel--ink .stat__label { color: rgba(247, 245, 240, 0.62); }

/* 斜向引导线 */
.rule-slant {
  height: 0;
  margin: clamp(24px, 3vw, 40px) 0;
  border: 0;
  border-top: 2px solid var(--gold);
  transform: skewY(-0.9deg);
  opacity: 0.9;
}

/* 文字引导链接 */
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 2px;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 2px solid var(--gold);
}

.link-more::after {
  content: "→";
  font-family: var(--mono);
  transition: transform 0.18s ease;
}

.link-more:hover::after { transform: translateX(4px); }
.panel--ink .link-more { color: var(--paper); }

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-top: 20px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--data);
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--stone);
}

.breadcrumb a {
  color: var(--ink-2);
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.breadcrumb a:hover { color: var(--ink); border-bottom-color: var(--gold); }

/* 图片容器基础规则（页面阶段放置图片占位） */
.media-frame {
  position: relative;
  overflow: hidden;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--r-card);
  background:
    repeating-linear-gradient(118deg,
      rgba(247, 245, 240, 0.1) 0 1px,
      transparent 1px 22px),
    linear-gradient(150deg, var(--ink-2), var(--ink) 62%, var(--deep));
  color: rgba(247, 245, 240, 0.8);
}

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

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1; }
.media-frame--ink { background-color: var(--deep); }

.media-frame__label {
  position: absolute;
  left: 16px;
  bottom: 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(247, 245, 240, 0.7);
}

/* 主题筛选胶囊 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip {
  padding: 7px 15px;
  border: 1px solid var(--stone);
  border-radius: var(--r-pill);
  background: #FFFFFF;
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.filter-chip:hover { border-color: var(--gold); }

.filter-chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.filter-status {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--data);
}

/* 入场显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  .nav-link { font-size: 13.5px; padding: 7px 10px; gap: 5px; }
  .header-actions .btn { padding: 8px 14px; font-size: 13.5px; }
  .brand-sub { letter-spacing: 0.12em; }
}

@media (max-width: 1000px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 34px 36px;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  :root { --shell: min(100% - 32px, 1240px); }

  .header-inner {
    grid-template-columns: 1fr auto;
    gap: 10px;
    padding-block: 10px;
  }

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

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 2;
    display: block;
    max-height: 100vh;
    max-height: 100dvh;
    overflow-y: auto;
    padding: 84px 20px 28px;
    background: var(--ink);
    border-bottom: 1px solid rgba(242, 180, 65, 0.32);
    box-shadow: 0 26px 48px rgba(6, 15, 30, 0.55);
    transform: translateY(-102%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    justify-content: flex-start;
  }

  .site-header[data-open] .site-nav { transform: translateY(0); }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    padding: 13px 14px;
    border-radius: 14px;
    font-size: 16px;
    width: 100%;
  }

  .nav-link::before { font-size: 10px; }

  .header-actions {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 55;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    background: rgba(6, 15, 30, 0.95);
    border-top: 1px solid rgba(242, 180, 65, 0.32);
  }

  .header-actions .btn { padding: 11px 10px; font-size: 14.5px; }

  .site-footer { padding-bottom: 104px; }

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

@media (max-width: 700px) {
  body { font-size: 16px; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .footer-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .brand-name { font-size: 17px; }
  .brand-sub { display: none; }
  .version-badge { font-size: 10px; padding: 3px 8px; }
}

@media (max-width: 420px) {
  .brand-cluster { gap: 8px; }
  .version-badge { display: none; }
}

/* ---------- 动效降级 ---------- */
@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;
  }

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

  .btn:hover,
  .version-badge:hover,
  .link-more:hover::after { transform: none; }
}