/* ============================================================
   LEYU赛场 · 共享样式表  /assets/site.css
   夜间看台 + 坐标蓝图 视觉体系
   ============================================================ */

/* ---------- 01 Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

a { color: inherit; }

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

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

main { display: block; }

#main-content { scroll-margin-top: 118px; }

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 02 变量 ---------- */
:root {
  /* 底色 */
  --ink: #06231C;
  --night: #0B1B33;
  --layer: #0E2F2B;
  --layer-deep: #0A2A26;

  /* 强调 */
  --lime: #B8FF3C;
  --lime-deep: #8FE81F;
  --amber: #FFB347;
  --amber-deep: #C97A21;

  /* 文本 */
  --mist: #CFEDE3;
  --paper: #F5FBF7;
  --slate: #7C97A1;

  /* 结构线 */
  --line: #1E4A44;
  --line-soft: rgba(30, 74, 68, .55);
  --line-faint: rgba(30, 74, 68, .28);

  /* 字体 */
  --font-display: "Noto Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 形状 */
  --radius-pill: 999px;
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;

  /* 动效 */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --dur: 240ms;

  --shadow-card: 0 26px 64px -38px rgba(0, 0, 0, .95);
  --wrap: 1240px;
}

/* ---------- 03 页面基底 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(30, 74, 68, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 74, 68, .22) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  background-position: -1px -1px;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 38% at 10% -6%, rgba(184, 255, 60, .10), transparent 70%),
    radial-gradient(52% 42% at 94% 4%, rgba(255, 179, 71, .07), transparent 72%);
}

body > * { position: relative; z-index: 1; }

::selection {
  background: var(--lime);
  color: #06170F;
}

/* ---------- 04 排版 ---------- */
.sl-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber);
}

.sl-h1, .sl-h2, .sl-h3 {
  font-family: var(--font-display);
  color: var(--paper);
  line-height: 1.06;
  letter-spacing: -.02em;
}

.sl-h1 {
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  font-weight: 900;
  line-height: 1.02;
}

.sl-h2 {
  font-size: clamp(1.65rem, 3.4vw, 2.8rem);
  font-weight: 800;
}

.sl-h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
  font-weight: 700;
  line-height: 1.3;
}

.sl-lead {
  font-size: clamp(1rem, 1.25vw, 1.15rem);
  color: var(--mist);
  line-height: 1.9;
  max-width: 44ch;
}

.sl-text {
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.sl-text p + p { margin-top: 1em; }

.sl-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .06em;
  font-size: .92em;
}

.sl-note {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--slate);
}

.sl-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--lime), var(--line) 34%, transparent 100%);
  opacity: .7;
}

/* ---------- 05 布局容器 ---------- */
.sl-wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

.sl-section { padding-block: clamp(48px, 7vw, 104px); }

.sl-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.sl-span-3 { grid-column: span 3; }
.sl-span-5 { grid-column: span 5; }
.sl-span-7 { grid-column: span 7; }
.sl-span-12 { grid-column: span 12; }

/* ---------- 06 头部：悬浮胶囊导航 ---------- */
.sl-topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: clamp(10px, 1.6vw, 18px) clamp(12px, 3vw, 28px);
  background: linear-gradient(180deg,
              rgba(6, 35, 28, .96) 0%,
              rgba(6, 35, 28, .72) 58%,
              rgba(6, 35, 28, 0) 100%);
  transition: padding var(--dur) var(--ease);
}

.sl-topbar[data-scrolled="true"] {
  padding-top: 6px;
  padding-bottom: 6px;
}

.sl-skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 130;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--lime);
  color: #06170F;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  transition: top 200ms var(--ease);
}

.sl-skip:focus {
  top: 14px;
}

.sl-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--lime) 0%, var(--amber) 100%);
  z-index: 120;
  pointer-events: none;
}

.sl-topbar__inner {
  position: relative;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 18px);
  min-height: 58px;
  padding: 7px 8px 7px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-soft);
  background: linear-gradient(120deg, rgba(11, 27, 51, .88), rgba(14, 47, 43, .82));
  box-shadow: 0 22px 48px -32px rgba(0, 0, 0, .95), inset 0 1px 0 rgba(207, 237, 227, .07);
  backdrop-filter: blur(16px) saturate(1.25);
  -webkit-backdrop-filter: blur(16px) saturate(1.25);
}

/* 品牌 */
.sl-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 1 auto;
  min-width: 0;
  margin-right: auto;
  text-decoration: none;
}

.sl-brand__mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid rgba(184, 255, 60, .55);
  background:
    radial-gradient(circle at 50% 50%, rgba(184, 255, 60, .22), transparent 64%),
    linear-gradient(140deg, rgba(11, 27, 51, .92), rgba(14, 47, 43, .92));
  box-shadow: inset 0 0 0 4px rgba(6, 35, 28, .8);
  transition: box-shadow var(--dur) var(--ease);
}

.sl-brand__mark::before,
.sl-brand__mark::after {
  content: "";
  position: absolute;
  background: var(--lime);
  opacity: .9;
}

.sl-brand__mark::before {
  left: 50%;
  top: 6px;
  bottom: 6px;
  width: 1px;
  transform: translateX(-50%);
}

.sl-brand__mark::after {
  top: 50%;
  left: 6px;
  right: 6px;
  height: 1px;
  transform: translateY(-50%);
}

.sl-brand:hover .sl-brand__mark {
  box-shadow: inset 0 0 0 4px rgba(6, 35, 28, .8), 0 0 0 4px rgba(184, 255, 60, .16);
}

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

.sl-brand__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--paper);
  white-space: nowrap;
}

.sl-brand__line {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--slate);
  white-space: nowrap;
}

/* 导航 */
.sl-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(30, 74, 68, .72);
  background: rgba(6, 35, 28, .55);
}

.sl-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.sl-nav__item { display: block; }

.sl-nav__link {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), background 180ms var(--ease),
              border-color 180ms var(--ease), transform 180ms var(--ease);
}

.sl-nav__link:hover {
  color: var(--paper);
  border-color: rgba(184, 255, 60, .5);
  background: rgba(184, 255, 60, .08);
  transform: translateY(-2px);
}

.sl-nav__link[aria-current="page"] {
  color: #06170F;
  background: var(--lime);
  border-color: var(--lime);
  font-weight: 700;
  box-shadow: 0 0 0 3px rgba(184, 255, 60, .16);
}

.sl-nav__cta { flex: 0 0 auto; }

/* 按钮 */
.sl-cta,
.sl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(184, 255, 60, .6);
  background: linear-gradient(120deg, var(--lime), var(--lime-deep));
  color: #06170F;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 12px 28px -18px rgba(184, 255, 60, .9);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease),
              background 180ms var(--ease), color 180ms var(--ease),
              border-color 180ms var(--ease);
}

.sl-cta:hover,
.sl-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 32px -16px rgba(184, 255, 60, .95);
}

.sl-btn--lime {
  background: linear-gradient(120deg, var(--lime), var(--lime-deep));
  border-color: rgba(184, 255, 60, .6);
  color: #06170F;
}

.sl-btn--ghost {
  background: rgba(14, 47, 43, .6);
  border-color: var(--line);
  color: var(--mist);
  box-shadow: none;
}

.sl-btn--ghost:hover {
  border-color: rgba(184, 255, 60, .55);
  color: var(--lime);
  box-shadow: none;
}

.sl-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

/* 汉堡 */
.sl-burger {
  display: none;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(6, 35, 28, .6);
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.sl-burger:hover {
  border-color: rgba(184, 255, 60, .55);
  background: rgba(184, 255, 60, .08);
}

.sl-burger__bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
  transition: transform var(--dur) var(--ease), opacity 160ms linear;
}

.sl-burger[aria-expanded="true"] .sl-burger__bar:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.sl-burger[aria-expanded="true"] .sl-burger__bar:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ---------- 07 通用组件 ---------- */
.sl-panel {
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(14, 47, 43, .72), rgba(11, 27, 51, .58));
  box-shadow: var(--shadow-card);
}

.sl-card {
  position: relative;
  padding: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(14, 47, 43, .66), rgba(11, 27, 51, .5));
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.sl-card:hover {
  border-color: rgba(184, 255, 60, .42);
  transform: translateY(-2px);
}

/* 面包屑 */
.sl-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
}

.sl-crumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.sl-crumb a:hover { color: var(--lime); }

.sl-crumb__sep { color: var(--line); }

/* 标签胶囊 */
.sl-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(14, 47, 43, .7);
  color: var(--mist);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.6;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease);
}

.sl-tag:hover {
  transform: translateY(-2px);
  border-color: rgba(184, 255, 60, .55);
  color: var(--lime);
}

.sl-tag--lime {
  border-color: rgba(184, 255, 60, .55);
  background: rgba(184, 255, 60, .1);
  color: var(--lime);
}

.sl-tag--amber {
  border-color: rgba(201, 122, 33, .72);
  background: rgba(255, 179, 71, .1);
  color: var(--amber);
}

/* 纵向时间轴 */
.sl-timeline {
  position: relative;
  padding-left: 28px;
}

.sl-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg,
              rgba(184, 255, 60, .75) 0%,
              rgba(30, 74, 68, .5) 22%,
              var(--line) 62%,
              rgba(30, 74, 68, 0) 100%);
}

.sl-timeline__item {
  position: relative;
  padding-block: 16px;
}

.sl-timeline__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 25px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 60, .12);
}

.sl-timeline__item:first-child::before {
  background: var(--lime);
}

.sl-timeline__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
}

.sl-timeline__title {
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 1.5vw, 1.25rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

/* 锚点悬浮块 */
.sl-anchor {
  position: sticky;
  top: 104px;
  align-self: start;
}

/* 折叠面板 */
.sl-fold {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(14, 47, 43, .6), rgba(11, 27, 51, .46));
  overflow: hidden;
}

.sl-fold + .sl-fold { margin-top: 10px; }

.sl-fold__head { margin: 0; }

.sl-fold__btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--paper);
  transition: color 180ms var(--ease);
}

.sl-fold__btn:hover { color: var(--lime); }

.sl-fold__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}

.sl-fold__icon::before,
.sl-fold__icon::after {
  content: "";
  position: absolute;
  left: 0;
  top: 6.5px;
  width: 14px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--lime);
  transition: transform 320ms var(--ease);
}

.sl-fold__icon::after { transform: rotate(90deg); }

.sl-fold__btn[aria-expanded="true"] .sl-fold__icon::after { transform: rotate(0deg); }

.sl-fold__wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 320ms var(--ease);
}

.sl-fold__wrap[data-open="true"] { grid-template-rows: 1fr; }

.sl-fold__inner { overflow: hidden; }

.sl-fold__body {
  padding: 0 20px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* 标签页 */
.sl-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sl-tab {
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(6, 35, 28, .6);
  color: var(--mist);
  font-size: 13px;
  letter-spacing: .06em;
  transition: background 180ms var(--ease), color 180ms var(--ease),
              border-color 180ms var(--ease), transform 180ms var(--ease);
}

.sl-tab:hover {
  border-color: rgba(184, 255, 60, .5);
  transform: translateY(-2px);
}

.sl-tab[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: #06170F;
  font-weight: 700;
}

.sl-tabpanel {
  padding-top: 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.sl-tabpanel[hidden] { display: none; }

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

.sl-chip {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(6, 35, 28, .6);
  color: var(--mist);
  font-size: 13px;
  letter-spacing: .06em;
  transition: background 180ms var(--ease), color 180ms var(--ease),
              border-color 180ms var(--ease), transform 180ms var(--ease);
}

.sl-chip:hover {
  border-color: rgba(184, 255, 60, .5);
  transform: translateY(-2px);
}

.sl-chip[aria-pressed="true"] {
  background: rgba(184, 255, 60, .14);
  border-color: var(--lime);
  color: var(--lime);
  font-weight: 700;
}

/* 图片容器 */
.sl-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background-color: var(--layer);
  background-image:
    linear-gradient(rgba(30, 74, 68, .38) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 74, 68, .38) 1px, transparent 1px),
    linear-gradient(150deg, rgba(14, 47, 43, .9), rgba(11, 27, 51, .9));
  background-size: 48px 48px, 48px 48px, 100% 100%;
}

.sl-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sl-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 35, 28, 0) 46%, rgba(6, 35, 28, .58) 100%);
}

.sl-figure--wide { aspect-ratio: 21 / 9; }
.sl-figure--tall { aspect-ratio: 4 / 5; }
.sl-figure--square { aspect-ratio: 1 / 1; }

.sl-figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

/* ---------- 08 页脚 ---------- */
.sl-foot {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg,
              rgba(11, 27, 51, .58) 0%,
              rgba(11, 27, 51, .96) 48%,
              #081426 100%);
  color: var(--mist);
}

.sl-foot::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(30, 74, 68, .2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 74, 68, .2) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
}

.sl-foot__inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) clamp(16px, 4vw, 40px) 0;
}

.sl-foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, .8fr) minmax(0, .85fr) minmax(0, 1.15fr);
  gap: clamp(24px, 3.4vw, 52px);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.sl-foot__col { min-width: 0; }

.sl-foot__col--brand { padding-right: clamp(0px, 2vw, 28px); }

.sl-foot__mark {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.1;
  color: var(--paper);
}

.sl-foot__claim {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lime);
}

.sl-foot__note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

.sl-foot__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-faint);
}

.sl-foot__list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sl-foot__list--meta { gap: 12px; }

.sl-foot__item { display: block; }

.sl-foot__link {
  display: inline-block;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--mist);
  text-decoration: none;
  transition: color 160ms var(--ease), transform 160ms var(--ease);
}

.sl-foot__link:hover {
  color: var(--lime);
  transform: translateX(3px);
}

.sl-foot__link[aria-current="page"] { color: var(--lime); }

.sl-foot__meta {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate);
  letter-spacing: .02em;
  word-break: break-word;
}

.sl-foot__meta .sl-mono { color: var(--mist); }

.sl-foot__base {
  border-top: 1px solid var(--line-soft);
  padding: clamp(18px, 3vw, 26px) 0 clamp(24px, 4vw, 38px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sl-foot__legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.9;
  color: var(--slate);
}

/* 返回顶部 */
.sl-totop {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 70;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(11, 27, 51, .88);
  color: var(--lime);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: opacity var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              border-color 180ms var(--ease),
              visibility 0s linear var(--dur);
}

.sl-totop[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s, 0s, 0s, 0s;
}

.sl-totop:hover {
  border-color: rgba(184, 255, 60, .6);
}

.sl-totop__glyph {
  font-size: 17px;
  line-height: 1;
  color: var(--lime);
}

/* ---------- 09 显现动效 ---------- */
.sl-js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 550ms var(--ease), transform 650ms var(--ease);
}

.sl-js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 10 无障碍 ---------- */
.sl-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;
}

/* ---------- 11 响应式 ---------- */
@media (max-width: 1180px) {
  .sl-brand__line { display: none; }
}

@media (max-width: 1000px) {
  .sl-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .sl-span-3,
  .sl-span-5,
  .sl-span-7 { grid-column: span 6; }

  .sl-foot__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(24px, 4vw, 36px);
  }

  .sl-foot__col--brand { grid-column: span 2; }
  .sl-foot__note { max-width: 52ch; }

  .sl-anchor {
    position: static;
    top: auto;
  }
}

@media (max-width: 960px) {
  body { background-size: 56px 56px, 56px 56px; }

  .sl-burger { display: inline-flex; }

  .sl-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: block;
    padding: 14px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: linear-gradient(160deg, rgba(11, 27, 51, .98), rgba(6, 35, 28, .98));
    box-shadow: var(--shadow-card);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(.985);
    transform-origin: top center;
    transition: opacity 220ms var(--ease),
                transform var(--dur) var(--ease),
                visibility 0s linear var(--dur);
    max-height: min(74vh, 560px);
    overflow-y: auto;
  }

  .sl-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    transition-delay: 0s, 0s, 0s;
  }

  .sl-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .sl-nav__link {
    padding: 13px 16px;
    font-size: 15px;
    border-radius: var(--radius-sm);
    border-color: var(--line-faint);
    background: rgba(14, 47, 43, .55);
  }

  .sl-nav__link:hover { transform: none; }

  .sl-nav__cta {
    width: 100%;
    margin-top: 10px;
    padding: 14px 20px;
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }

  .sl-grid { grid-template-columns: 1fr; }
  .sl-span-3,
  .sl-span-5,
  .sl-span-7,
  .sl-span-12 { grid-column: span 1; }

  .sl-topbar__inner { padding: 6px 6px 6px 12px; border-radius: 26px; }
  .sl-brand__mark { width: 30px; height: 30px; }
  .sl-brand__name { font-size: 15.5px; }

  .sl-foot__grid { grid-template-columns: 1fr; }
  .sl-foot__col--brand { grid-column: span 1; }
  .sl-foot__base { flex-direction: column; align-items: flex-start; }

  .sl-timeline { padding-left: 24px; }
  .sl-timeline__item::before { left: -19px; }
  .sl-timeline::before { left: 8px; }
}

/* ---------- 12 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
  }

  .sl-js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .sl-nav,
  .sl-totop,
  .sl-fold__wrap,
  .sl-fold__icon::before,
  .sl-fold__icon::after {
    transition: none !important;
  }
}