/* ============================================================
   18新利电竞 · 赛前数据室 — /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%; }

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

ol, ul { padding: 0; 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; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #070B12;
  --ink-2: #0A1019;
  --char: #141B26;
  --char-2: #1B2431;
  --frost: #E8F1FF;
  --mist: #8B98AB;
  --cyan: #35F2D0;
  --orange: #FF7A1A;
  --violet: #8B5CF6;
  --steel: #4A6B8A;
  --teal: #0E3B3A;
  --amber: #FFD166;

  --line: rgba(74, 107, 138, 0.34);
  --line-soft: rgba(74, 107, 138, 0.18);
  --body-text: #C3D0E1;
  --dim-text: #7C8A9D;

  --font-display: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-ui: "Barlow Condensed", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-data: "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --wrap: 1320px;
  --gutter: clamp(20px, 4vw, 40px);
  --radius: 14px;
  --radius-sm: 8px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 中文排版基础 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(1200px 620px at 82% -12%, rgba(14, 59, 58, 0.55), transparent 70%),
    radial-gradient(900px 520px at 4% 2%, rgba(139, 92, 246, 0.10), transparent 66%),
    repeating-linear-gradient(0deg, rgba(74, 107, 138, 0.05) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(90deg, rgba(74, 107, 138, 0.05) 0 1px, transparent 1px 88px);
  color: var(--body-text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.28;
  color: var(--frost);
  letter-spacing: 0.01em;
}

p { word-break: break-word; }

strong { color: var(--frost); font-weight: 600; }

::selection { background: rgba(53, 242, 208, 0.28); color: #FFFFFF; }

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

.mono {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 10px 20px;
  border-radius: 6px;
  background: var(--cyan);
  color: #04110E;
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid #04110E;
  outline-offset: -5px;
}

/* ---------- 5. 头部外壳 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(7, 11, 18, 0.985), rgba(7, 11, 18, 0.93));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

/* 5.1 状态轨 */
.status-rail {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px var(--gutter);
  overflow: hidden;
  white-space: nowrap;
  background:
    linear-gradient(90deg,
      rgba(14, 59, 58, 0.88) 0%,
      rgba(20, 27, 38, 0.66) 46%,
      rgba(139, 92, 246, 0.16) 100%);
  border-bottom: 1px solid rgba(74, 107, 138, 0.22);
  font-family: var(--font-data);
  font-size: 11px;
  line-height: 1.45;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.status-rail__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(53, 242, 208, 0.55);
  animation: pulse-dot 2.6s var(--ease) infinite;
}

@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(53, 242, 208, 0.55); }
  70%  { box-shadow: 0 0 0 7px rgba(53, 242, 208, 0); }
  100% { box-shadow: 0 0 0 0 rgba(53, 242, 208, 0); }
}

.status-rail__text {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #A9B8CB;
}

.status-rail__meta {
  flex: none;
  color: var(--cyan);
  letter-spacing: 0.2em;
}

/* 5.2 命令栏 */
.cmd-bar {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  width: 100%;
  max-width: var(--wrap);
  min-height: 64px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
  padding: 8px 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 11px 4px 11px 4px;
  background: linear-gradient(150deg, var(--cyan) 0%, #1FAE97 58%, var(--violet) 165%);
  color: #04110E;
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0;
  box-shadow: inset 0 0 0 1px rgba(7, 11, 18, 0.35), 0 0 22px -9px var(--cyan);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
}

.brand__name {
  font-family: var(--font-ui);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--frost);
}

.brand__sub {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--mist);
  text-transform: uppercase;
}

/* 5.3 索引导航 */
.cmd-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-left: auto;
  min-width: 0;
}

.cmd-nav__list {
  display: flex;
  align-items: stretch;
}

.cmd-nav__item {
  border-left: 1px solid var(--line-soft);
}

.cmd-nav__item:last-child {
  border-right: 1px solid var(--line-soft);
}

.cmd-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 11px 13px;
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #C9D6E6;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.cmd-nav__idx {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0;
  color: var(--steel);
  transition: color 0.2s var(--ease);
}

.cmd-nav__label {
  white-space: nowrap;
}

.cmd-nav__link:hover {
  background: rgba(53, 242, 208, 0.07);
  color: var(--frost);
}

.cmd-nav__link:hover .cmd-nav__idx { color: var(--cyan); }

.cmd-nav__link[aria-current="page"] {
  background: rgba(53, 242, 208, 0.09);
  color: var(--frost);
}

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

.cmd-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
}

.cmd-nav__utility {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid rgba(139, 92, 246, 0.4);
}

.cmd-nav__util {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: #B9A6F7;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.cmd-nav__util:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* 5.4 右端行动区 */
.cmd-bar__end {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.cmd-bar__cta {
  white-space: nowrap;
}

/* 5.5 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid rgba(53, 242, 208, 0.4);
  border-radius: var(--radius-sm);
  background: rgba(53, 242, 208, 0.07);
  color: var(--cyan);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.09em;
  cursor: pointer;
  transition: background-color 0.18s var(--ease);
}

.nav-toggle:hover { background: rgba(53, 242, 208, 0.15); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.16s var(--ease);
}

.site-header[data-open] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 5.6 滚动进度 */
.scroll-progress {
  position: relative;
  height: 2px;
  overflow: hidden;
  background: rgba(74, 107, 138, 0.18);
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--violet) 62%, var(--orange) 100%);
  transition: transform 0.12s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(14, 59, 58, 0.65), transparent 62%),
    linear-gradient(180deg, var(--ink-2), var(--ink) 70%);
  color: var(--mist);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--violet) 55%, var(--orange) 100%);
  opacity: 0.85;
}

.site-footer__aura {
  position: absolute;
  right: -140px;
  bottom: -190px;
  width: 560px;
  height: 460px;
  border-radius: 46% 54% 38% 62% / 58% 42% 58% 42%;
  background: radial-gradient(circle at 32% 32%,
    rgba(53, 242, 208, 0.16),
    rgba(14, 59, 58, 0.5) 55%,
    transparent 74%);
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  padding-top: clamp(48px, 6vw, 84px);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 0.85fr 0.85fr 1.3fr;
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}

.site-footer__brandline {
  font-family: var(--font-display);
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--frost);
}

.site-footer__note {
  max-width: 34ch;
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dim-text);
}

.site-footer__meta {
  display: inline-block;
  margin-top: 18px;
  padding: 5px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

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

.site-footer__coltitle {
  margin-bottom: 16px;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.site-footer__list {
  display: grid;
  gap: 9px;
}

.site-footer__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: 15px;
  letter-spacing: 0.05em;
  color: #AEBBCD;
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.site-footer__link::before {
  content: "";
  flex: none;
  width: 6px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
  transform: translateY(-4px);
}

.site-footer__link:hover {
  color: var(--cyan);
  transform: translateX(3px);
}

.site-footer__contactlist {
  display: grid;
  gap: 11px;
}

.site-footer__contactrow {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 10px;
}

.site-footer__label {
  flex: none;
  min-width: 34px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.site-footer__value {
  min-width: 0;
  font-family: var(--font-data);
  font-size: 13px;
  line-height: 1.65;
  color: #C9D6E6;
  word-break: break-word;
}

.site-footer__contactnote {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dim-text);
}

.copy-btn {
  margin-left: 8px;
  padding: 2px 10px;
  border: 1px solid rgba(53, 242, 208, 0.35);
  border-radius: 999px;
  background: transparent;
  color: var(--cyan);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
  vertical-align: baseline;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.copy-btn:hover { background: rgba(53, 242, 208, 0.14); }

.copy-btn[data-copied="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04110E;
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  margin-top: clamp(32px, 4vw, 56px);
  padding: 20px 0 28px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.site-footer__copy,
.site-footer__icp,
.site-footer__addr {
  margin: 0;
}

/* ---------- 7. 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.col-3  { grid-column-end: span 3; }
.col-4  { grid-column-end: span 4; }
.col-5  { grid-column-end: span 5; }
.col-6  { grid-column-end: span 6; }
.col-7  { grid-column-end: span 7; }
.col-8  { grid-column-end: span 8; }
.col-9  { grid-column-end: span 9; }
.col-12 { grid-column-end: span 12; }

.offset-1 { grid-column-start: 2; }
.offset-2 { grid-column-start: 3; }

/* ---------- 8. 章节 ---------- */
.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.section--tight { padding-block: clamp(32px, 4vw, 56px); }

.section--char {
  background: linear-gradient(180deg, var(--char) 0%, var(--ink) 100%);
  border-block: 1px solid var(--line-soft);
}

.section--teal {
  background:
    radial-gradient(90% 70% at 10% 0%, rgba(14, 59, 58, 0.9), transparent 70%),
    linear-gradient(180deg, rgba(14, 59, 58, 0.5), rgba(7, 11, 18, 0));
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 24px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  padding: 18px 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.breadcrumb a {
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

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

.breadcrumb__sep {
  color: var(--steel);
  user-select: none;
}

.breadcrumb__current { color: var(--frost); }

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 22px;
  border: 1px solid var(--btn-bd, var(--line));
  border-radius: var(--radius-sm);
  background: var(--btn-bg, transparent);
  color: var(--btn-fg, var(--frost));
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.3;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease),
    color 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--primary {
  --btn-bg: var(--orange);
  --btn-fg: #140800;
  --btn-bd: transparent;
}

.btn--primary:hover {
  box-shadow: 0 12px 28px -14px rgba(255, 122, 26, 0.9);
}

.btn--ghost {
  --btn-bg: rgba(53, 242, 208, 0.06);
  --btn-fg: var(--cyan);
  --btn-bd: rgba(53, 242, 208, 0.45);
}

.btn--ghost:hover { --btn-bg: rgba(53, 242, 208, 0.15); }

.btn--sm {
  padding: 8px 16px;
  font-size: 14px;
}

.btn--block {
  display: flex;
  width: 100%;
}

/* ---------- 11. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(74, 107, 138, 0.1);
  color: var(--mist);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.5;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag--cyan {
  color: var(--cyan);
  border-color: rgba(53, 242, 208, 0.38);
  background: rgba(53, 242, 208, 0.1);
}

.tag--violet {
  color: #C4B0FD;
  border-color: rgba(139, 92, 246, 0.42);
  background: rgba(139, 92, 246, 0.14);
}

.tag--amber {
  color: var(--amber);
  border-color: rgba(255, 209, 102, 0.4);
  background: rgba(255, 209, 102, 0.1);
}

.tag--orange {
  color: #FFB183;
  border-color: rgba(255, 122, 26, 0.45);
  background: rgba(255, 122, 26, 0.12);
}

/* ---------- 12. 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.2vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(27, 36, 49, 0.85), rgba(20, 27, 38, 0.94));
}

.panel--frame::before,
.panel--frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  opacity: 0.7;
  pointer-events: none;
}

.panel--frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: var(--radius);
}

.panel--frame::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
  border-bottom-right-radius: var(--radius);
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 14px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.panel__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--frost);
}

.panel__body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

/* ---------- 13. 引导语与刻度 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  flex: none;
  width: 26px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.75;
}

.rule-scale {
  height: 11px;
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(90deg,
    rgba(74, 107, 138, 0.85) 0 1px,
    transparent 1px 14px);
  background-repeat: repeat-x;
  background-size: 100% 6px;
  background-position: 0 100%;
}

/* ---------- 14. 图片容器基础 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(14, 59, 58, 0.9), rgba(7, 11, 18, 0.96) 62%),
    linear-gradient(135deg, rgba(139, 92, 246, 0.22), transparent 58%);
}

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

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

.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 14px 16px;
  background: linear-gradient(0deg, rgba(7, 11, 18, 0.94), transparent);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #C3D0E1;
}

/* ---------- 15. 长文 ---------- */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
}

.prose > * + * { margin-top: 1.1em; }

.prose h2 {
  margin-top: 2em;
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.3;
}

.prose h3 {
  margin-top: 1.8em;
  font-family: var(--font-ui);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--frost);
}

.prose ul,
.prose ol {
  padding-left: 1.35em;
  list-style: revert;
}

.prose li + li { margin-top: 0.5em; }

.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 16. 显现动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.42s var(--ease) calc(var(--i, 0) * 70ms),
    transform 0.42s var(--ease) calc(var(--i, 0) * 70ms);
  will-change: opacity, transform;
}

.reveal.is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1180px) {
  .cmd-nav__utility { display: none; }
  .cmd-nav__link { padding: 11px 11px; font-size: 14px; }
}

@media (max-width: 1080px) {
  .cmd-nav__idx { display: none; }
}

@media (max-width: 1000px) {
  .nav-toggle { display: inline-flex; }

  .cmd-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 5;
    display: none;
    flex-direction: column;
    align-items: stretch;
    margin: 0;
    padding: 6px var(--gutter) 22px;
    background: rgba(8, 13, 20, 0.985);
    border-top: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 44px -26px #000000;
    max-height: calc(100dvh - 110px);
    overflow-y: auto;
  }

  .site-header[data-open] .cmd-nav { display: flex; }

  .cmd-nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .cmd-nav__item {
    border-left: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .cmd-nav__item:last-child { border-right: 0; }

  .cmd-nav__link {
    justify-content: flex-start;
    padding: 14px 4px;
    font-size: 17px;
  }

  .cmd-nav__idx { display: inline; font-size: 11px; }

  .cmd-nav__link[aria-current="page"]::after {
    left: 4px;
    right: auto;
    width: 30px;
    bottom: 9px;
  }

  .cmd-nav__utility {
    display: flex;
    flex-wrap: wrap;
    margin: 18px 0 0;
    padding: 16px 0 0;
    border-left: 0;
    border-top: 1px solid rgba(139, 92, 246, 0.3);
  }

  .cmd-nav__util { font-size: 14px; }

  .grid-12 { gap: 18px; }

  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 {
    grid-column-end: span 12;
  }

  .offset-1, .offset-2 { grid-column-start: auto; }
}

@media (max-width: 900px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 36px;
  }

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

@media (max-width: 640px) {
  .cmd-bar { min-height: 60px; }
  .cmd-bar__cta { display: none; }
  .brand__mark { width: 34px; height: 34px; font-size: 13px; }
  .brand__name { font-size: 15px; }
  .brand__sub { font-size: 9px; letter-spacing: 0.16em; }

  .status-rail { padding: 6px 16px; font-size: 10px; gap: 9px; }
  .status-rail__meta { display: none; }

  .site-footer__grid { grid-template-columns: 1fr; row-gap: 32px; }
  .site-footer__note { max-width: none; }
  .site-footer__base { font-size: 11px; gap: 8px 18px; }
}

/* ---------- 18. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .btn:hover,
  .site-footer__link:hover { transform: none; }
}