/* ============================================================
   ROR 电竞 · 赛季专题 — /assets/site.css
   共享外壳：reset / 变量 / 排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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

ul, ol { padding: 0; }

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

button { font: inherit; color: inherit; }

a { color: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #05060B;
  --ink-2: #0C1022;
  --violet: #6A3DFF;
  --violet-deep: #3A1FA8;
  --cyan: #2FF3E0;
  --gold: #FFC94A;
  --r-red: #FF5A7A;
  --r-green: #39D98A;
  --r-blue: #4C6FFF;

  --text: #F2F4FF;
  --dim: #A9B1D6;
  --line: #262B42;
  --glass: rgba(12, 16, 34, .84);

  --accent: #6A3DFF;

  --shell: 1260px;
  --frame: 13px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  --font-cn: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(980px 640px at 84% -8%, rgba(106, 61, 255, .22), transparent 62%),
    radial-gradient(760px 520px at 2% 6%, rgba(47, 243, 224, .09), transparent 60%),
    radial-gradient(900px 700px at 50% 118%, rgba(58, 31, 168, .24), transparent 62%),
    var(--ink);
  color: var(--text);
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

/* 赛场围栏：四边固定刻线 */
body::after {
  content: "";
  position: fixed;
  inset: var(--frame);
  border: 1px solid rgba(106, 61, 255, .16);
  pointer-events: none;
  z-index: 20;
}

h1, h2, h3 {
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.06;
}

h1 { font-size: clamp(42px, 7vw, 104px); }
h2 { font-size: clamp(26px, 3.2vw, 42px); }
h3 { font-size: clamp(19px, 1.6vw, 23px); letter-spacing: -.01em; }

p { max-width: 40em; }

a {
  color: var(--text);
  text-decoration: none;
  transition: color .18s var(--ease);
}

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

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

::selection {
  background: rgba(106, 61, 255, .55);
  color: #fff;
}

.mono {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}

.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;
}

/* ---------- 4. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 28px;
}

.page-main {
  position: relative;
  z-index: 10;
  padding-block: 56px 24px;
}

.stack > * + * { margin-top: 22px; }

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--line), rgba(38, 43, 66, .15));
}

.note {
  color: var(--dim);
  font-size: 13px;
  line-height: 1.7;
  font-family: var(--font-mono);
  letter-spacing: .03em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--cyan);
}

.lead {
  font-size: 18px;
  line-height: 1.85;
  color: var(--dim);
  max-width: 36em;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--violet);
  background: transparent;
  color: var(--text);
  font-family: var(--font-cn);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease),
              color .18s var(--ease), transform .18s var(--ease), box-shadow .18s var(--ease);
}

.btn:hover {
  color: #fff;
  background: rgba(106, 61, 255, .2);
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(47, 243, 224, .28) inset;
}

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

.btn--violet {
  background: linear-gradient(135deg, var(--violet) 0%, var(--violet-deep) 100%);
  border-color: transparent;
  color: #fff;
}

.btn--violet:hover {
  background: linear-gradient(135deg, #7F55FF 0%, #4A27C6 100%);
  border-color: transparent;
}

.btn--ghost {
  border-color: var(--line);
  color: var(--dim);
}

.btn--ghost:hover { color: var(--text); border-color: var(--violet); }

.btn--sm { padding: 9px 16px; font-size: 13px; }

/* ---------- 6. 头部 ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(5, 6, 11, .96) 0%, rgba(5, 6, 11, .82) 100%);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.site-head__rule {
  display: block;
  height: 2px;
  background: linear-gradient(90deg,
    rgba(106, 61, 255, 0) 0%,
    var(--violet) 10%,
    #9B7CFF 50%,
    var(--violet) 90%,
    rgba(106, 61, 255, 0) 100%);
  transition: height .24s var(--ease), opacity .24s var(--ease);
}

.site-head[data-condensed] .site-head__rule {
  height: 5px;
  background: linear-gradient(90deg,
    rgba(106, 61, 255, .1) 0%,
    var(--violet) 8%,
    var(--cyan) 50%,
    var(--violet) 92%,
    rgba(106, 61, 255, .1) 100%);
}

.site-head__bar { position: relative; }

.site-head__inner {
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 68px;
  padding-block: 11px;
}

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

.site-head__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--violet);
  background: linear-gradient(150deg, rgba(106, 61, 255, .38), rgba(47, 243, 224, .1));
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
}

.site-head__sig {
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1.2;
}

.site-head__sig b {
  font-size: 15px;
  font-weight: 900;
  letter-spacing: .04em;
}

.site-head__sig i {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--dim);
}

/* 主导航 */
.site-nav { margin-inline: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 16px 14px 10px;
  color: var(--dim);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .07em;
  white-space: nowrap;
  transition: color .18s var(--ease);
}

.site-nav__link::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 50%;
  width: 1px;
  height: 7px;
  background: var(--line);
  transform: translateX(-50%);
  transition: background .18s var(--ease), height .18s var(--ease);
}

.site-nav__link:hover { color: var(--text); }
.site-nav__link:hover::before { background: var(--cyan); }

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

.site-nav__link[aria-current="page"]::before {
  height: 12px;
  background: var(--violet);
  box-shadow: 0 0 10px rgba(106, 61, 255, .9);
}

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

/* 头部工具区 */
.site-head__tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

/* 赛区切换器 */
.region { position: relative; }

.region[data-tone="red"] { --accent: var(--r-red); }
.region[data-tone="green"] { --accent: var(--r-green); }
.region[data-tone="blue"] { --accent: var(--r-blue); }
.region[data-tone="gold"] { --accent: var(--gold); }
.region[data-tone="cyan"] { --accent: var(--cyan); }
.region[data-tone="violet"] { --accent: var(--violet); }

.region__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: rgba(12, 16, 34, .72);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .05em;
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
}

.region__btn:hover,
.region__btn[aria-expanded="true"] {
  border-color: var(--accent);
  background: rgba(12, 16, 34, .95);
}

.region__dot {
  width: 7px;
  height: 7px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: regionPulse 2.6s ease-in-out infinite;
}

@keyframes regionPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.82); }
}

.region__label { color: var(--dim); }

.region__value {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--text);
}

.region__menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 186px;
  list-style: none;
  padding: 6px;
  background: var(--glass);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  z-index: 70;
  animation: menuIn .18s var(--ease);
}

.region__menu[hidden] { display: none; }

@keyframes menuIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.region__menu button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 9px 12px;
  border: 0;
  background: none;
  color: var(--dim);
  font-size: 13px;
  letter-spacing: .04em;
  text-align: left;
  cursor: pointer;
  transition: background .16s var(--ease), color .16s var(--ease);
}

.region__menu button::after {
  content: "";
  width: 6px;
  height: 6px;
  background: transparent;
  border: 1px solid var(--line);
}

.region__menu button[data-tone="red"] { --dot: var(--r-red); }
.region__menu button[data-tone="green"] { --dot: var(--r-green); }
.region__menu button[data-tone="blue"] { --dot: var(--r-blue); }
.region__menu button[data-tone="gold"] { --dot: var(--gold); }
.region__menu button[data-tone="violet"] { --dot: var(--violet); }

.region__menu button:hover,
.region__menu button:focus-visible {
  background: rgba(106, 61, 255, .18);
  color: var(--text);
}

.region__menu button[aria-pressed="true"] { color: var(--cyan); }

.region__menu button[aria-pressed="true"]::after {
  background: var(--dot, var(--cyan));
  border-color: var(--dot, var(--cyan));
  box-shadow: 0 0 8px var(--dot, var(--cyan));
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: rgba(12, 16, 34, .72);
  color: var(--text);
  font-size: 13px;
  letter-spacing: .06em;
  cursor: pointer;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: var(--cyan);
  transition: background .18s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--cyan);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

.nav-toggle__text { font-weight: 600; }

/* 阅读进度条 */
.site-head__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: block;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.site-head__progress i {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .12s linear;
}

/* 跳转链接 */
.skip-link {
  position: absolute;
  top: 8px;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .05em;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--ink);
}

/* ---------- 7. 页脚 ---------- */
.site-foot {
  position: relative;
  z-index: 10;
  margin-top: 104px;
  padding-block: 68px 26px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(700px 380px at 12% 0%, rgba(106, 61, 255, .18), transparent 66%),
    linear-gradient(180deg, rgba(12, 16, 34, .5) 0%, #080A14 60%);
}

.site-foot__grid {
  display: grid;
  grid-template-columns: 1.5fr .85fr .85fr 1.25fr;
  gap: 44px;
  padding-bottom: 46px;
  border-bottom: 1px solid var(--line);
}

.site-foot__mark {
  font-size: 19px;
  font-weight: 900;
  letter-spacing: .02em;
  max-width: none;
}

.site-foot__mark-in {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan);
  margin-right: 6px;
}

.site-foot__desc {
  margin-top: 14px;
  color: var(--dim);
  font-size: 14.5px;
  line-height: 1.85;
  max-width: 30em;
}

.site-foot__tag {
  margin-top: 18px;
  font-size: 11px;
  letter-spacing: .22em;
  color: rgba(169, 177, 214, .6);
}

.site-foot__title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--text);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.site-foot__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 14px;
  color: var(--dim);
}

.site-foot__link {
  color: var(--dim);
  font-size: 14px;
  letter-spacing: .03em;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.site-foot__link:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.site-foot__key {
  display: inline-block;
  width: 2.2em;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--line);
}

.site-foot__key[data-tone="red"] { color: var(--r-red); }
.site-foot__key[data-tone="green"] { color: var(--r-green); }
.site-foot__key[data-tone="blue"] { color: var(--r-blue); }
.site-foot__key[data-tone="gold"] { color: var(--gold); }
.site-foot__key[data-tone="violet"] { color: #9B7CFF; }

.site-foot__data { gap: 12px; }

.site-foot__data li {
  display: grid;
  grid-template-columns: 3.2em 1fr;
  gap: 10px;
  align-items: start;
}

.site-foot__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: rgba(169, 177, 214, .62);
  padding-top: 3px;
}

.site-foot__v {
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
  word-break: break-word;
}

.site-foot__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(169, 177, 214, .7);
}

.site-foot__copy { max-width: none; }
.site-foot__icp { max-width: none; }

.site-foot__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
  max-width: none;
}

.site-foot__legal .site-foot__link { font-size: 12.5px; }
.site-foot__legal .site-foot__link:hover { padding-left: 0; }

/* ---------- 8. 基础内容组件 ---------- */
.crumb {
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim);
}

.crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  list-style: none;
}

.crumb__list li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

.crumb__list a { color: var(--dim); }
.crumb__list a:hover { color: var(--cyan); }
.crumb__list [aria-current="page"] { color: var(--text); }

.page-head {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-bottom: 40px;
}

.page-head h1 { max-width: 16em; }

.section { padding-block: 46px; }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 22px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.section__title { font-size: clamp(22px, 2.4vw, 32px); }

.grid {
  display: grid;
  gap: 22px;
}

.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)); }

.card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(12, 16, 34, .92) 0%, rgba(5, 6, 11, .7) 100%);
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(106, 61, 255, .62);
  box-shadow: 0 18px 40px -28px rgba(106, 61, 255, .8);
}

.card__title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 10px;
}

.card__text {
  color: var(--dim);
  font-size: 15px;
  line-height: 1.8;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim);
}

.tag[data-tone="red"] { border-color: rgba(255, 90, 122, .5); color: var(--r-red); }
.tag[data-tone="green"] { border-color: rgba(57, 217, 138, .5); color: var(--r-green); }
.tag[data-tone="blue"] { border-color: rgba(76, 111, 255, .5); color: var(--r-blue); }
.tag[data-tone="gold"] { border-color: rgba(255, 201, 74, .5); color: var(--gold); }
.tag[data-tone="cyan"] { border-color: rgba(47, 243, 224, .5); color: var(--cyan); }
.tag[data-tone="violet"] { border-color: rgba(106, 61, 255, .6); color: #9B7CFF; }

.pill {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(106, 61, 255, .14);
  border-left: 2px solid var(--violet);
  color: var(--text);
  font-size: 13px;
  letter-spacing: .04em;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: rgba(12, 16, 34, .6);
}

.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--cyan);
  line-height: 1.1;
}

.stat__num[data-tone="gold"] { color: var(--gold); }
.stat__num[data-tone="violet"] { color: #9B7CFF; }

.stat__label {
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--dim);
  font-family: var(--font-mono);
}

/* 页内目录 */
.toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.toc__link {
  display: block;
  padding: 9px 16px;
  color: var(--dim);
  font-size: 14px;
  letter-spacing: .04em;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.toc__link:hover {
  color: var(--text);
  background: rgba(106, 61, 255, .1);
}

.toc__link[data-active] {
  color: var(--text);
  border-left-color: var(--cyan);
  background: rgba(47, 243, 224, .07);
}

/* 图片容器（页面阶段放入 img / svg） */
.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(106, 61, 255, .3) 0%, rgba(5, 6, 11, .2) 46%, rgba(47, 243, 224, .16) 100%),
    var(--ink-2);
}

.media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 auto;
  width: 46px;
  height: 46px;
  border-right: 1px solid rgba(106, 61, 255, .55);
  border-bottom: 1px solid rgba(106, 61, 255, .55);
  pointer-events: none;
}

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

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media__caption {
  margin-top: 10px;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1180px) {
  .site-foot__grid { grid-template-columns: 1.3fr 1fr 1fr; }
  .site-foot__col:last-child { grid-column: 1 / -1; }
  .site-foot__data { flex-direction: row; flex-wrap: wrap; gap: 10px 32px; }
  .site-foot__data li { grid-template-columns: auto 1fr; }
}

@media (max-width: 1060px) {
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(370px, 88vw);
    height: 100vh;
    margin: 0;
    padding: 88px 26px 40px;
    overflow-y: auto;
    background: rgba(5, 6, 11, .97);
    border-left: 1px solid var(--line);
    box-shadow: -30px 0 60px -40px rgba(106, 61, 255, .9);
    transform: translateX(103%);
    transition: transform .24s var(--ease);
    z-index: 80;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    padding: 16px 6px 16px 20px;
    font-size: 17px;
    letter-spacing: .08em;
    border-bottom: 1px solid var(--line);
  }

  .site-nav__link::before {
    top: 50%;
    left: 4px;
    height: 7px;
    transform: translateY(-50%);
  }

  .site-nav__link:hover::before,
  .site-nav__link[aria-current="page"]::before { height: 7px; }

  .site-nav__link[aria-current="page"]::after { display: none; }
  .site-nav__link[aria-current="page"] {
    background: rgba(106, 61, 255, .12);
    box-shadow: inset 2px 0 0 var(--violet);
  }

  .nav-toggle { display: inline-flex; }
  .site-head__tools { margin-left: auto; }
  .site-nav { margin-inline: 0; }
}

@media (max-width: 900px) {
  body { font-size: 16px; }
  .shell { padding-inline: 22px; }
  :root { --frame: 10px; }

  .page-main { padding-block: 40px 16px; }
  .section { padding-block: 34px; }

  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .site-foot { margin-top: 72px; padding-block: 52px 22px; }
  .site-foot__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px;
  }
  .site-foot__brand { grid-column: 1 / -1; }
  .site-foot__col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .shell { padding-inline: 18px; }

  .site-head__inner { gap: 12px; min-height: 62px; }
  .site-head__sig { display: none; }
  .site-head__mark { width: 38px; height: 38px; font-size: 12px; }

  .site-head__tools .btn { padding: 8px 12px; font-size: 12px; letter-spacing: .02em; }
  .region__label { display: none; }
  .region__value { max-width: 6.2em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .region__btn { padding: 8px 10px; font-size: 12px; }
  .nav-toggle__text { display: none; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

  .page-head { padding-bottom: 28px; }

  .site-foot__grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .site-foot__base { flex-direction: column; align-items: flex-start; gap: 8px; }
  .site-foot__legal { margin-left: 0; gap: 14px; }

  .region__menu { right: auto; left: 0; }
}

/* ---------- 10. 动效与可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .card:hover { transform: none; }
  .btn:active { transform: none; }
}

@media (prefers-contrast: more) {
  :root {
    --dim: #C7CDE8;
    --line: #4A5170;
  }
}