/* ============================================================
   KAIYUN赛场 · 共享样式表 /assets/site.css
   墨绿场底 · 荧光青路径 · 橙红重点 · 蓝图网格 · 等宽数字
   ============================================================ */

/* ---------- 0. RESET ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

[hidden] { display: none !important; }

/* ---------- 1. 变量 ---------- */
:root {
  --ky-ink: #061713;
  --ky-void: #030C0A;
  --ky-panel: #0C2A24;
  --ky-cyan: #2FF0CE;
  --ky-cyan-soft: #9BFBE8;
  --ky-orange: #FF5A2B;
  --ky-amber: #FFA23A;
  --ky-white: #F2FBF8;
  --ky-mist: #8FA9A3;
  --ky-glass: rgba(255, 255, 255, 0.06);

  --ky-line: rgba(47, 240, 206, 0.18);
  --ky-line-soft: rgba(242, 251, 248, 0.08);

  --ky-font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system,
    "Segoe UI", Roboto, sans-serif;
  --ky-font-mono: "SFMono-Regular", ui-monospace, Consolas,
    "Liberation Mono", Menlo, "Courier New", monospace;

  --ky-ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --ky-radius: 3px;
}

/* ---------- 2. 基础排版 ---------- */
body {
  background-color: var(--ky-ink);
  color: var(--ky-white);
  font-family: var(--ky-font-body);
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.ky-display {
  font-weight: 200;
  font-size: clamp(2.5rem, 7vw, 6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.ky-h2 {
  font-weight: 500;
  font-size: clamp(1.75rem, 3.4vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.ky-h3 {
  font-weight: 500;
  font-size: clamp(1.25rem, 1.8vw, 2rem);
  line-height: 1.25;
}

.ky-index {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ky-mist);
}

.ky-mono {
  font-family: var(--ky-font-mono);
  font-weight: 600;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.ky-prose {
  max-width: 42em;
  color: var(--ky-white);
}

.ky-prose p + p { margin-top: 1.1em; }

.ky-prose a {
  color: var(--ky-cyan);
  border-bottom: 1px solid var(--ky-line);
}

.ky-prose a:hover { color: var(--ky-cyan-soft); }

/* ---------- 3. 焦点与动效偏好 ---------- */
:focus-visible {
  outline: 2px solid var(--ky-cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 4. 容器与通用布局 ---------- */
.ky-shell {
  width: min(1240px, 100% - 2.5rem);
  margin-inline: auto;
}

.ky-section {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.ky-section + .ky-section {
  border-top: 1px solid var(--ky-line-soft);
}

.ky-grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

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

/* ---------- 5. 跳过导航 ---------- */
.ky-skip {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 200;
  padding: 0.6em 1.1em;
  background-color: var(--ky-cyan);
  color: var(--ky-void);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 2px;
  transform: translateY(-220%);
  transition: transform 0.2s var(--ky-ease);
}

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

/* ---------- 6. 按钮 ---------- */
.ky-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.7em 1.25em;
  border: 1px solid var(--ky-cyan);
  border-radius: var(--ky-radius);
  color: var(--ky-cyan);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: background-color 0.24s var(--ky-ease),
    color 0.24s var(--ky-ease), border-color 0.24s var(--ky-ease);
}

.ky-btn--cta {
  background-color: var(--ky-cyan);
  border-color: var(--ky-cyan);
  color: var(--ky-void);
  font-weight: 600;
}

.ky-btn--cta:hover {
  background-color: var(--ky-cyan-soft);
  border-color: var(--ky-cyan-soft);
}

.ky-btn--ghost {
  background-color: transparent;
  color: var(--ky-cyan);
}

.ky-btn--ghost:hover {
  background-color: rgba(47, 240, 206, 0.12);
  color: var(--ky-cyan-soft);
}

/* ---------- 7. 刊头 ---------- */
.ky-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-image: linear-gradient(
    180deg,
    rgba(6, 23, 19, 0.97),
    rgba(6, 23, 19, 0.88)
  );
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ky-line-soft);
}

.ky-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-image: linear-gradient(
    90deg,
    var(--ky-cyan),
    var(--ky-amber) 62%,
    var(--ky-orange)
  );
  z-index: 2;
}

.ky-header__blueprint,
.ky-footer__blueprint {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(
      to right,
      rgba(47, 240, 206, 0.07) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, rgba(47, 240, 206, 0.05) 1px, transparent 1px);
  background-size: 88px 88px, 88px 44px;
  -webkit-mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.85),
    rgba(0, 0, 0, 0.15)
  );
  mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.85),
    rgba(0, 0, 0, 0.15)
  );
}

.ky-header__inner {
  position: relative;
  z-index: 1;
}

.ky-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.7rem 0.35rem;
}

.ky-header__stamp {
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
}

.ky-header__stamp--rev {
  color: var(--ky-amber);
}

.ky-masthead {
  padding-block: clamp(0.75rem, 2vw, 1.4rem) clamp(0.5rem, 1.6vw, 1rem);
  text-align: center;
}

.ky-masthead__kicker {
  font-size: 0.75rem;
  letter-spacing: 0.34em;
  color: var(--ky-cyan);
  margin-bottom: 0.6rem;
}

.ky-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4em;
  font-size: clamp(2rem, 6vw, 4.25rem);
  font-weight: 200;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ky-white);
}

.ky-brand__latin {
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.ky-brand__cn {
  color: var(--ky-cyan);
  font-weight: 300;
  letter-spacing: 0.08em;
}

.ky-brand--footer {
  display: flex;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-top: 0.75rem;
}

.ky-masthead__tagline {
  margin-top: 0.7rem;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--ky-mist);
}

/* ---------- 8. 导航 ---------- */
.ky-header__nav-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  padding-block: 0.5rem;
  border-top: 1px solid var(--ky-line-soft);
}

.ky-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.ky-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.15rem 0.4rem;
}

.ky-nav__item {
  display: block;
}

.ky-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.55em 0.7em;
  font-size: 0.9375rem;
  color: var(--ky-mist);
  transition: color 0.2s var(--ky-ease);
}

.ky-nav__link::before {
  content: attr(data-index);
  font-family: var(--ky-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: rgba(143, 169, 163, 0.7);
  transition: color 0.2s var(--ky-ease);
}

.ky-nav__link::after {
  content: "";
  position: absolute;
  left: 0.7em;
  right: 0.7em;
  bottom: 0.15em;
  height: 1px;
  background-color: var(--ky-cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.24s var(--ky-ease);
}

.ky-nav__link:hover {
  color: var(--ky-white);
}

.ky-nav__link:hover::before {
  color: var(--ky-cyan);
}

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

.ky-nav__link[aria-current="page"]::before,
.ky-nav__link[aria-current="page"]::after {
  color: var(--ky-cyan);
}

.ky-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.ky-nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55em 0.85em;
  border: 1px solid var(--ky-line);
  border-radius: var(--ky-radius);
  color: var(--ky-cyan);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
}

.ky-nav-toggle:hover {
  border-color: var(--ky-cyan);
}

.ky-nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.ky-nav-toggle__bars::before,
.ky-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  transition: transform 0.24s var(--ky-ease), top 0.24s var(--ky-ease),
    bottom 0.24s var(--ky-ease);
}

.ky-nav-toggle__bars::before { top: 0; }
.ky-nav-toggle__bars::after { bottom: 0; }

.ky-header[data-open] .ky-nav-toggle__bars::before {
  top: 50%;
  transform: rotate(45deg);
}

.ky-header[data-open] .ky-nav-toggle__bars::after {
  bottom: calc(50% - 1px);
  transform: rotate(-45deg);
}

.ky-header__cta {
  flex: 0 0 auto;
}

/* ---------- 9. 页脚 ---------- */
.ky-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 7rem);
  padding-block: clamp(2.5rem, 6vw, 4.5rem) 1.5rem;
  background-color: var(--ky-void);
  border-top: 1px solid var(--ky-line);
  overflow: hidden;
}

.ky-footer__blueprint {
  background-size: 64px 64px, 64px 32px;
  -webkit-mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.7),
    rgba(0, 0, 0, 0.1)
  );
  mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.7),
    rgba(0, 0, 0, 0.1)
  );
}

.ky-footer .ky-shell {
  position: relative;
  z-index: 1;
}

.ky-footer__top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: clamp(1.5rem, 4vw, 4rem);
}

.ky-footer__note {
  max-width: 24em;
  margin-top: 0.75rem;
  font-size: 0.9375rem;
  color: var(--ky-mist);
}

.ky-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.ky-footer__col-title {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ky-cyan);
}

.ky-footer__list {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.9rem;
}

.ky-footer__link {
  font-size: 0.9375rem;
  color: var(--ky-mist);
  transition: color 0.2s var(--ky-ease);
}

.ky-footer__link:hover {
  color: var(--ky-cyan-soft);
}

.ky-footer__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2.25rem;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--ky-line-soft);
}

.ky-footer__contact-item {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 0.9375rem;
}

.ky-footer__contact-label {
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ky-mist);
}

.ky-footer__reply {
  flex: 1 1 100%;
  max-width: 56em;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--ky-mist);
}

.ky-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--ky-line-soft);
  font-size: 0.8125rem;
  color: var(--ky-mist);
}

.ky-footer__legal-item {
  font-size: 0.8125rem;
  color: var(--ky-mist);
}

/* ---------- 10. 通用组件 ---------- */
.ky-panel {
  padding: clamp(1.25rem, 3vw, 2rem);
  background-color: var(--ky-panel);
  border: 1px solid var(--ky-line-soft);
  border-radius: var(--ky-radius);
}

.ky-glass {
  padding: clamp(1.25rem, 3vw, 2rem);
  background-color: var(--ky-glass);
  border: 1px solid var(--ky-line);
  border-radius: var(--ky-radius);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.ky-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.25em 0.65em;
  border: 1px solid var(--ky-line);
  border-radius: 999px;
  color: var(--ky-cyan);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.ky-tag--hot {
  border-color: rgba(255, 90, 43, 0.55);
  background-color: rgba(255, 90, 43, 0.08);
  color: var(--ky-orange);
}

.ky-tag--batch {
  border-color: rgba(255, 162, 58, 0.5);
  color: var(--ky-amber);
}

/* 面包屑 */
.ky-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5em;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ky-mist);
}

.ky-crumbs a {
  color: var(--ky-mist);
  transition: color 0.2s var(--ky-ease);
}

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

.ky-crumbs__sep {
  color: rgba(143, 169, 163, 0.5);
}

.ky-crumbs [aria-current="page"] {
  color: var(--ky-white);
}

/* 索引轴 */
.ky-axis {
  position: sticky;
  top: 9rem;
  align-self: start;
  display: grid;
  gap: 0.25rem;
  padding-left: 1rem;
  border-left: 1px solid var(--ky-line-soft);
}

.ky-axis__title {
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ky-mist);
}

.ky-axis__list {
  display: grid;
  gap: 0.15rem;
}

.ky-axis__link {
  display: grid;
  grid-template-columns: 2.25em 1fr;
  gap: 0.5rem;
  padding: 0.35em 0;
  font-size: 0.875rem;
  color: var(--ky-mist);
  transition: color 0.2s var(--ky-ease);
}

.ky-axis__link::before {
  content: attr(data-index);
  font-family: var(--ky-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(143, 169, 163, 0.7);
}

.ky-axis__link:hover {
  color: var(--ky-white);
}

.ky-axis__link[aria-current="true"] {
  color: var(--ky-cyan);
}

.ky-axis__link[aria-current="true"]::before {
  color: var(--ky-cyan);
}

/* 时间轴 */
.ky-timeline {
  position: relative;
  display: grid;
  gap: 1.5rem;
  padding-left: 1.5rem;
}

.ky-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.4em;
  bottom: 0.4em;
  width: 1px;
  background-image: linear-gradient(
    180deg,
    var(--ky-cyan),
    rgba(47, 240, 206, 0.05)
  );
}

.ky-timeline__item {
  position: relative;
}

.ky-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1.5rem - 4px);
  top: 0.6em;
  width: 9px;
  height: 9px;
  border: 1px solid var(--ky-cyan);
  border-radius: 50%;
  background-color: var(--ky-ink);
}

.ky-timeline__item--hot::before {
  background-color: var(--ky-orange);
  border-color: var(--ky-orange);
}

.ky-timeline__meta {
  font-size: 0.8125rem;
  color: var(--ky-mist);
}

/* 筛选条 */
.ky-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.ky-filter__btn {
  padding: 0.45em 0.95em;
  border: 1px solid var(--ky-line);
  border-radius: 999px;
  color: var(--ky-mist);
  font-size: 0.875rem;
  transition: color 0.2s var(--ky-ease),
    border-color 0.2s var(--ky-ease), background-color 0.2s var(--ky-ease);
}

.ky-filter__btn:hover {
  border-color: var(--ky-cyan-soft);
  color: var(--ky-white);
}

.ky-filter__btn[aria-pressed="true"] {
  background-color: var(--ky-cyan);
  border-color: var(--ky-cyan);
  color: var(--ky-void);
  font-weight: 600;
}

.ky-filter__meta {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ky-mist);
}

/* 图片容器 */
.ky-figure {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.ky-figure__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--ky-line-soft);
  border-radius: var(--ky-radius);
  background-image: radial-gradient(
      120% 90% at 18% 0%,
      rgba(47, 240, 206, 0.2),
      transparent 60%
    ),
    radial-gradient(
      90% 80% at 92% 100%,
      rgba(255, 90, 43, 0.16),
      transparent 65%
    ),
    linear-gradient(160deg, #0C2A24, #030C0A);
}

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

.ky-figure__caption {
  font-size: 0.8125rem;
  color: var(--ky-mist);
}

.ky-figure--wide .ky-figure__media {
  aspect-ratio: 21 / 9;
}

/* 筛选淡入 */
@keyframes ky-fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.ky-enter {
  animation: ky-fade-up 0.36s var(--ky-ease) both;
}

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1024px) {
  .ky-axis {
    position: static;
    top: auto;
  }
}

@media (max-width: 900px) {
  .ky-nav-toggle { display: inline-flex; }

  .ky-header__cta { display: none; }

  .ky-header__nav-row { justify-content: space-between; }

  .ky-nav {
    position: absolute;
    left: -1.25rem;
    right: -1.25rem;
    top: 100%;
    display: none;
    padding: 1rem 1.25rem 1.25rem;
    background-color: rgba(12, 42, 36, 0.98);
    border-top: 1px solid var(--ky-line);
    border-bottom: 1px solid var(--ky-line);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    z-index: 5;
  }

  .ky-header[data-open] .ky-nav { display: block; }

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

  .ky-nav__link {
    width: 100%;
    padding: 0.8em 0.2em;
    font-size: 1rem;
    border-bottom: 1px solid var(--ky-line-soft);
  }

  .ky-nav__link::after { left: 0.2em; right: auto; width: 2.5rem; }

  .ky-grid--2,
  .ky-grid--3 { grid-template-columns: 1fr; }

  .ky-footer__top { grid-template-columns: 1fr; }

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

@media (max-width: 640px) {
  .ky-shell { width: min(1240px, 100% - 1.5rem); }

  .ky-header__bar { flex-wrap: wrap; gap: 0.35rem; }

  .ky-masthead__kicker { letter-spacing: 0.22em; }

  .ky-nav { left: -0.75rem; right: -0.75rem; }

  .ky-footer__cols { grid-template-columns: 1fr; }

  .ky-footer__contact { gap: 0.75rem; }

  .ky-footer__legal {
    flex-direction: column;
    align-items: flex-start;
  }
}