/* ===========================================================
   球赛主站 · 共享站点样式 site.css
   视觉母题：夜间球场灯光下的电子计分牌
   =========================================================== */

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

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

body { margin: 0; }

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}

button { background: none; border: 0; }

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

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

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

table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色 */
  --ink-950: #0A0E17;   /* 深空蓝黑 */
  --ink-900: #111827;   /* 深墨蓝 */
  --ink-800: #2A2F3A;   /* 深灰 */
  --ink-700: #3B4356;
  --paper:   #F5F0E6;   /* 暖纸色 */
  --neon:    #00E5A0;   /* 荧光青绿 */
  --flare:   #FF4D2E;   /* 炽热橙红 */
  --silver:  #B0B8C4;   /* 金属银灰 */
  --elec:    #2D9CDB;   /* 电光蓝 */
  --white:   #FFFFFF;   /* 高亮白 */

  /* 语义色 */
  --bg:          var(--ink-950);
  --surface:     var(--ink-900);
  --text:        #E7EBF3;
  --text-dim:    var(--silver);
  --text-faint:  #7C8698;
  --line:        rgba(176, 184, 196, 0.20);
  --line-strong: rgba(176, 184, 196, 0.42);

  /* 字体 */
  --font-display: 'Impact', 'Arial Narrow', 'Haettenschweiler', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Roboto Mono', 'Courier New', ui-monospace, monospace;

  /* 度量 */
  --shell: 1240px;
  --gutter: clamp(18px, 4vw, 48px);
  --hdr-h: 72px;
  --radius: 2px;

  /* 阴影 */
  --shadow-hard: 6px 6px 0 0 rgba(0, 0, 0, 0.55);
  --shadow-panel: 0 28px 52px -38px rgba(0, 0, 0, 0.95);
  --glow-neon: 0 0 0 1px rgba(0, 229, 160, 0.35), 0 0 26px -6px rgba(0, 229, 160, 0.45);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink-950);
  background-image:
    radial-gradient(1080px 520px at 10% -8%, rgba(0, 229, 160, 0.10), transparent 62%),
    radial-gradient(900px 460px at 94% 2%, rgba(255, 77, 46, 0.085), transparent 60%),
    linear-gradient(rgba(176, 184, 196, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176, 184, 196, 0.045) 1px, transparent 1px);
  background-size: auto, auto, 68px 68px, 68px 68px;
  background-attachment: fixed, fixed, fixed, fixed;
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#main-content { scroll-margin-top: calc(var(--hdr-h) + 8px); }

::selection {
  background: var(--neon);
  color: var(--ink-950);
}

:where(a, button, [tabindex], summary):focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* ---------- 4. 无障碍 ---------- */
.sk-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 300;
  transform: translateY(-180%);
  padding: 0.7rem 1.15rem;
  background: var(--neon);
  color: var(--ink-950);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 0 rgba(0, 0, 0, 0.55);
  transition: transform 0.18s var(--ease);
}

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

/* ---------- 5. 滚动进度灯带 ---------- */
.sk-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  background: rgba(176, 184, 196, 0.08);
}

.sk-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--neon) 0%, var(--elec) 58%, var(--flare) 100%);
  transition: width 0.08s linear;
}

/* ---------- 6. 头部 ---------- */
.sk-header {
  position: sticky;
  top: 0;
  z-index: 150;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.28s var(--ease), border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.sk-header[data-stuck] {
  background: rgba(10, 14, 23, 0.93);
  border-bottom-color: var(--line);
  box-shadow: 0 18px 40px -34px rgba(0, 0, 0, 1);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
}

.sk-header__inner {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
  min-height: var(--hdr-h);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 36px);
}

/* 品牌 */
.sk-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}

.sk-brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink-950);
  background: linear-gradient(135deg, var(--neon) 0%, #7CFFD4 100%);
  border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 74% 100%, 0 100%);
  box-shadow: 0 0 22px -8px rgba(0, 229, 160, 0.95);
}

.sk-brand__text { display: block; min-width: 0; }

.sk-brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.14rem;
  line-height: 1.1;
  letter-spacing: 0.06em;
  color: var(--white);
}

.sk-brand__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
  white-space: nowrap;
}

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

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

.sk-nav__item { display: block; }

.sk-nav__link {
  position: relative;
  display: block;
  padding: 10px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dim);
  border-radius: var(--radius);
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}

.sk-nav__link::before {
  content: attr(data-idx);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  letter-spacing: 0.04em;
  color: var(--ink-700);
  margin-right: 6px;
  vertical-align: 0.42em;
  transition: color 0.18s var(--ease);
}

.sk-nav__link:hover {
  color: var(--white);
  background: rgba(176, 184, 196, 0.09);
}

.sk-nav__link:hover::before { color: var(--neon); }

.sk-nav__link[aria-current="page"] {
  color: var(--ink-950);
  background: var(--neon);
  font-weight: 700;
  box-shadow: 0 0 24px -8px rgba(0, 229, 160, 0.9);
}

.sk-nav__link[aria-current="page"]::before {
  color: rgba(10, 14, 23, 0.6);
}

/* 头部动作区 */
.sk-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* ---------- 7. 通用按钮 ---------- */
.sk-btn {
  --btn-bg: var(--neon);
  --btn-fg: var(--ink-950);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72rem 1.15rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  border: 1px solid rgba(0, 0, 0, 0.28);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 0 rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: transform 0.16s var(--ease), box-shadow 0.16s var(--ease), background 0.16s var(--ease), color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.sk-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 0 rgba(0, 0, 0, 0.5);
}

.sk-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 0 rgba(0, 0, 0, 0.5);
}

.sk-btn--sm {
  padding: 0.5rem 0.85rem;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  box-shadow: 3px 3px 0 0 rgba(0, 0, 0, 0.5);
}

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

.sk-btn--ghost:hover {
  --btn-bg: rgba(245, 240, 230, 0.08);
  box-shadow: none;
}

.sk-btn--flare {
  --btn-bg: var(--flare);
  --btn-fg: var(--white);
}

/* ---------- 8. 移动导航按钮 ---------- */
.sk-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  background: rgba(176, 184, 196, 0.08);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.sk-nav-toggle:hover {
  border-color: var(--line-strong);
  background: rgba(176, 184, 196, 0.14);
}

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

.sk-nav-toggle__bars {
  display: inline-grid;
  gap: 3px;
  width: 16px;
}

.sk-nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.sk-nav-toggle[aria-expanded="true"] {
  border-color: rgba(0, 229, 160, 0.55);
  color: var(--neon);
}

.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__bars i:nth-child(2) {
  opacity: 0;
}

.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ---------- 9. 移动端导航面板 ---------- */
@media (max-width: 1000px) {
  :root { --hdr-h: 64px; }

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

  .sk-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-inline: 0;
    display: none;
    padding: 10px var(--gutter) 18px;
    background: var(--ink-900);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line-strong);
    box-shadow: 0 30px 54px -28px rgba(0, 0, 0, 1);
    max-height: calc(100vh - var(--hdr-h) - 16px);
    overflow-y: auto;
  }

  .sk-nav[data-open] {
    display: block;
    animation: sk-nav-in 0.22s var(--ease) both;
  }

  .sk-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .sk-nav__link {
    padding: 14px 12px;
    font-size: 1rem;
    border-bottom: 1px solid rgba(176, 184, 196, 0.12);
    border-radius: 0;
  }

  .sk-nav__link::before {
    font-size: 0.66rem;
    vertical-align: 0.3em;
  }

  .sk-nav__link[aria-current="page"] {
    box-shadow: none;
  }
}

@keyframes sk-nav-in {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 620px) {
  .sk-brand__sub { display: none; }
  .sk-brand__mark { width: 34px; height: 34px; font-size: 13px; }
  .sk-brand__name { font-size: 1.02rem; }
  .sk-header__actions { gap: 7px; }
  .sk-header__actions .sk-btn {
    padding: 0.46rem 0.62rem;
    font-size: 0.72rem;
    letter-spacing: 0.03em;
    box-shadow: 2px 2px 0 0 rgba(0, 0, 0, 0.5);
  }
  .sk-nav-toggle { padding: 8px 10px; }
}

/* ---------- 10. 页脚 ---------- */
.sk-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 132px);
  background: var(--ink-900);
  border-top: 1px solid var(--line);
  color: var(--text-dim);
}

.sk-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon) 0%, var(--elec) 48%, var(--flare) 100%);
  opacity: 0.9;
}

.sk-footer__inner {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
  padding-top: clamp(42px, 6vw, 72px);
}

.sk-footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: clamp(26px, 3.4vw, 56px);
  align-items: start;
}

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

.sk-brand--footer { margin-bottom: 16px; }

.sk-footer__note {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text-faint);
  max-width: 30ch;
}

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

.sk-footer__title {
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.sk-footer__title::before {
  content: attr(data-idx) " / ";
  color: var(--ink-700);
}

.sk-footer__list {
  display: grid;
  gap: 10px;
}

.sk-footer__link {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--silver);
  transition: color 0.16s var(--ease), transform 0.16s var(--ease);
}

.sk-footer__link:hover {
  color: var(--neon);
  transform: translateX(4px);
}

.sk-footer__contact {
  display: grid;
  gap: 15px;
}

.sk-footer__contact-item {
  display: grid;
  gap: 3px;
  padding-left: 12px;
  border-left: 2px solid rgba(0, 229, 160, 0.35);
}

.sk-footer__contact-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--text-faint);
}

.sk-footer__contact-value {
  font-size: 0.89rem;
  line-height: 1.55;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.sk-footer__bottom {
  margin-top: clamp(36px, 5vw, 58px);
  padding-block: 20px 26px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

.sk-footer__icp { color: var(--silver); }

/* ---------- 11. 返回顶部 ---------- */
.sk-backtop {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 180;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease), visibility 0.24s, color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.sk-backtop[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sk-backtop:hover {
  color: var(--neon);
  border-color: rgba(0, 229, 160, 0.55);
}

.sk-backtop__arrow { font-size: 0.92rem; line-height: 1; }

/* ---------- 12. 布局容器与网格 ---------- */
.sk-container {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
}

.sk-section { padding-block: clamp(48px, 7vw, 96px); }
.sk-section--tight { padding-block: clamp(28px, 4vw, 52px); }

.sk-grid {
  display: grid;
  gap: clamp(16px, 2vw, 26px);
}

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

/* ---------- 13. 排版组件 ---------- */
.sk-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--neon);
}

.sk-eyebrow::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
}

.sk-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1;
  letter-spacing: 0.012em;
  color: var(--white);
}

.sk-title--xl {
  font-size: clamp(2.6rem, 8vw, 5.6rem);
  line-height: 0.94;
}

.sk-lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.72;
  color: var(--text-dim);
}

.sk-text { color: var(--text-dim); }
.sk-text--paper { color: #333B4A; }

.sk-link {
  color: var(--elec);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.16s var(--ease);
}

.sk-link:hover { color: var(--neon); }

.sk-list { display: grid; gap: 10px; }

.sk-list__item {
  position: relative;
  padding-left: 20px;
  color: var(--text-dim);
}

.sk-list__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 9px;
  height: 2px;
  background: var(--neon);
}

.sk-rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(24px, 4vw, 48px);
}

.sk-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1;
}

/* ---------- 14. 状态标签 ---------- */
.sk-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver);
  background: rgba(176, 184, 196, 0.07);
  white-space: nowrap;
}

.sk-chip--live {
  color: var(--neon);
  border-color: rgba(0, 229, 160, 0.5);
  background: rgba(0, 229, 160, 0.11);
}

.sk-chip--done {
  color: var(--silver);
  border-color: var(--line-strong);
  background: rgba(176, 184, 196, 0.08);
}

.sk-chip--urgent {
  color: var(--flare);
  border-color: rgba(255, 77, 46, 0.55);
  background: rgba(255, 77, 46, 0.13);
}

.sk-chip--info {
  color: var(--elec);
  border-color: rgba(45, 156, 219, 0.5);
  background: rgba(45, 156, 219, 0.13);
}

/* ---------- 15. 专题研究板 ---------- */
.sk-panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-900);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.sk-panel--paper {
  background: var(--paper);
  border-color: #D8D0BE;
  color: #1B2230;
}

.sk-panel--paper .sk-text,
.sk-panel--paper .sk-lede { color: #4A5262; }

.sk-panel--live {
  border-color: rgba(0, 229, 160, 0.42);
  box-shadow: var(--glow-neon);
}

.sk-panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--line);
}

.sk-panel--paper .sk-panel__head { border-bottom-color: rgba(27, 34, 48, 0.18); }

.sk-panel__title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.15;
  letter-spacing: 0.03em;
  color: var(--white);
}

.sk-panel--paper .sk-panel__title { color: #0A0E17; }

/* ---------- 16. 图片容器 ---------- */
.sk-figure {
  position: relative;
  margin: 0;
  background: var(--ink-900);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.sk-figure__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--ink-800);
  background-image:
    linear-gradient(140deg, rgba(0, 229, 160, 0.12) 0%, transparent 56%),
    linear-gradient(320deg, rgba(255, 77, 46, 0.09) 0%, transparent 52%),
    repeating-linear-gradient(115deg, rgba(176, 184, 196, 0.075) 0 2px, transparent 2px 10px);
}

.sk-figure__media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sk-figure__cap {
  padding: 11px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

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

.sk-figure--slant {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

/* ---------- 17. 面包屑 ---------- */
.sk-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}

.sk-breadcrumb__link {
  color: var(--silver);
  transition: color 0.16s var(--ease);
}

.sk-breadcrumb__link:hover { color: var(--neon); }

.sk-breadcrumb__sep { color: var(--ink-700); }

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1180px) {
  .sk-nav__link {
    padding: 9px 9px;
    font-size: 0.85rem;
  }
}

@media (max-width: 1024px) {
  .sk-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sk-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .sk-footer__top { grid-template-columns: 1fr 1fr; }
  .sk-footer__brand { grid-column: 1 / -1; }
  .sk-footer__note { max-width: 46ch; }
}

@media (max-width: 640px) {
  .sk-grid--2,
  .sk-grid--3,
  .sk-grid--4 { grid-template-columns: minmax(0, 1fr); }

  .sk-section { padding-block: clamp(40px, 10vw, 64px); }

  .sk-footer__top { grid-template-columns: minmax(0, 1fr); }

  .sk-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .sk-backtop {
    right: 14px;
    bottom: 14px;
    padding: 9px 12px;
  }
}

/* ---------- 19. 降低动效 ---------- */
@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;
  }

  .sk-progress__bar { transition: none; }
}