/* ============================================================
   K1体育3915 · 共享样式表 /assets/site.css
   夜场数据流：深空蓝底 + 玻璃层 + 荧光青操作层
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background-color: var(--k1-void);
  color: var(--k1-white);
  font-family: var(--k1-sans);
  font-size: 1rem;
  line-height: 1.85;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(36, 52, 92, 0.55) 0 1px, transparent 1px 104px),
    repeating-linear-gradient(0deg, rgba(36, 52, 92, 0.38) 0 1px, transparent 1px 104px);
  opacity: 0.55;
}

img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
hr { border: 0; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--k1-cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- tokens ---------- */
:root {
  --k1-void: #060B1C;
  --k1-night: #0E1734;
  --k1-cyan: #35F2D6;
  --k1-orange: #FF8A3D;
  --k1-lineblue: #9FD8FF;
  --k1-white: #F2F6FF;
  --k1-mute: #8FA3C8;
  --k1-teal: #0A5D57;
  --k1-amber: #FFD166;
  --k1-grid: #24345C;

  --k1-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --k1-mono: "IBM Plex Mono", "JetBrains Mono", Inter, system-ui, ui-monospace, monospace;

  --k1-shell-w: 1240px;
  --k1-gutter: clamp(1rem, 4vw, 2.5rem);
  --k1-radius: 2px;
  --k1-head-h: 78px;

  --k1-hair: rgba(159, 216, 255, 0.18);
  --k1-hair-strong: rgba(159, 216, 255, 0.36);
  --k1-glass: rgba(14, 23, 52, 0.62);
}

/* ---------- layout ---------- */
.k1-shell {
  width: min(var(--k1-shell-w), 100% - (var(--k1-gutter) * 2));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.k1-section { padding-block: clamp(2.6rem, 6vw, 5.4rem); }

.k1-stack > * + * { margin-top: var(--k1-gap, 1rem); }
.k1-stack--lg { --k1-gap: 1.9rem; }

.k1-g2,
.k1-g3,
.k1-g4 { display: grid; gap: clamp(0.9rem, 2.4vw, 1.8rem); }
.k1-g2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); }
.k1-g3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }
.k1-g4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr)); }

.k1-rule { height: 1px; background: var(--k1-grid); }

/* ---------- typography ---------- */
.k1-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--k1-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--k1-cyan);
}
.k1-eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--k1-cyan);
  flex: none;
}
.k1-eyebrow--warm { color: var(--k1-orange); }
.k1-eyebrow--warm::before { background: var(--k1-orange); }

.k1-display {
  font-size: clamp(3.2rem, 9vw, 8rem);
  font-weight: 200;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--k1-white);
}

.k1-h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.k1-h3 {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
}

.k1-lede {
  max-width: 56ch;
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--k1-mute);
}

.k1-num {
  font-family: var(--k1-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.k1-mute { color: var(--k1-mute); }
.k1-cyan { color: var(--k1-cyan); }
.k1-warm { color: var(--k1-orange); }
.k1-amber { color: var(--k1-amber); }

/* ---------- breadcrumb ---------- */
.k1-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--k1-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--k1-mute);
}
.k1-crumb a { transition: color 0.2s ease; }
.k1-crumb a:hover { color: var(--k1-cyan); }
.k1-crumb__sep { color: var(--k1-grid); user-select: none; }

/* ---------- buttons ---------- */
.k1-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.72rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--k1-radius);
  font-size: 0.86rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease,
              border-color 0.2s ease, box-shadow 0.2s ease;
}

.k1-btn--accent {
  background: var(--k1-cyan);
  color: #04121A;
}
.k1-btn--accent:hover,
.k1-btn--accent:focus-visible {
  box-shadow: 0 0 0 1px var(--k1-cyan), 0 0 22px rgba(53, 242, 214, 0.38);
}

.k1-btn--ghost {
  border-color: var(--k1-hair-strong);
  color: var(--k1-white);
  background: rgba(14, 23, 52, 0.4);
}
.k1-btn--ghost:hover,
.k1-btn--ghost:focus-visible {
  border-color: var(--k1-cyan);
  color: var(--k1-cyan);
  box-shadow: 0 0 18px rgba(53, 242, 214, 0.2);
}

.k1-btn--sm {
  padding: 0.5rem 0.85rem;
  font-family: var(--k1-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
}

/* ---------- card ---------- */
.k1-card {
  position: relative;
  padding: clamp(1.05rem, 2.4vw, 1.7rem);
  background: var(--k1-night);
  border: 1px solid var(--k1-grid);
  border-radius: var(--k1-radius);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.k1-card:hover {
  border-color: var(--k1-hair-strong);
  box-shadow: 0 14px 40px -28px rgba(53, 242, 214, 0.55);
}
.k1-card--glass {
  background: var(--k1-glass);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-color: var(--k1-hair);
}
.k1-card--teal {
  background: var(--k1-teal);
  border-color: rgba(53, 242, 214, 0.28);
}
.k1-card__meta {
  font-family: var(--k1-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--k1-mute);
}

/* ---------- index list ---------- */
.k1-index {
  border-top: 1px solid var(--k1-grid);
}
.k1-index__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.1rem;
  padding: 0.85rem 0.2rem;
  border-bottom: 1px solid var(--k1-grid);
  transition: background-color 0.2s ease, opacity 0.18s ease;
}
.k1-index__row:hover { background: rgba(14, 23, 52, 0.72); }
.k1-index__key {
  flex: none;
  min-width: 5.4rem;
  font-family: var(--k1-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--k1-cyan);
  font-variant-numeric: tabular-nums;
}
.k1-index__main {
  flex: 1 1 13rem;
  font-size: 0.95rem;
  line-height: 1.7;
}
.k1-index__note {
  flex: 1 1 100%;
  font-size: 0.82rem;
  color: var(--k1-mute);
}
.k1-index__tag {
  flex: none;
  font-family: var(--k1-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--k1-cyan);
  border: 1px solid rgba(53, 242, 214, 0.3);
  padding: 0.12rem 0.5rem;
  border-radius: 999px;
}
.k1-index__tag--warm {
  color: var(--k1-orange);
  border-color: rgba(255, 138, 61, 0.36);
}

/* ---------- filter ---------- */
.k1-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.k1-filter__label {
  font-family: var(--k1-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--k1-mute);
  margin-right: 0.25rem;
}
.k1-chip {
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--k1-hair);
  border-radius: 999px;
  background: rgba(14, 23, 52, 0.5);
  color: var(--k1-mute);
  font-family: var(--k1-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  transition: color 0.2s ease, border-color 0.2s ease,
              background-color 0.2s ease;
}
.k1-chip:hover { color: var(--k1-white); border-color: var(--k1-hair-strong); }
.k1-chip[aria-pressed="true"] {
  background: var(--k1-cyan);
  border-color: var(--k1-cyan);
  color: #04121A;
}

/* ---------- steps ---------- */
.k1-steps {
  display: grid;
  gap: 1px;
  background: var(--k1-grid);
  border: 1px solid var(--k1-grid);
  grid-template-columns: 1fr;
}
.k1-steps__item {
  position: relative;
  padding: 1.1rem 1.2rem 1.25rem;
  background: var(--k1-night);
  transition: background-color 0.25s ease;
}
.k1-steps__item:hover { background: var(--k1-teal); }
.k1-steps__num {
  display: inline-block;
  font-family: var(--k1-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--k1-cyan);
  font-variant-numeric: tabular-nums;
}
.k1-steps__title { margin-top: 0.35rem; font-size: 1rem; font-weight: 700; }
.k1-steps__note {
  margin-top: 0.35rem;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--k1-mute);
}

/* ---------- media ---------- */
.k1-media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(150deg, var(--k1-night), var(--k1-void));
  border: 1px solid var(--k1-hair);
  border-radius: var(--k1-radius);
}
.k1-media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.k1-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(14, 23, 52, 0.18), rgba(6, 11, 28, 0.6)),
    radial-gradient(90% 70% at 82% 8%, rgba(53, 242, 214, 0.16), transparent 62%);
}
.k1-media--wide { aspect-ratio: 21 / 9; }
.k1-media--tall { aspect-ratio: 3 / 4; }
.k1-media--square { aspect-ratio: 1 / 1; }
.k1-media__cap {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--k1-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--k1-mute);
}

/* ---------- toc ---------- */
.k1-toc__link {
  display: block;
  padding: 0.35rem 0 0.35rem 1.1rem;
  border-left: 1px solid var(--k1-grid);
  font-family: var(--k1-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--k1-mute);
  transition: color 0.2s ease, border-color 0.2s ease, padding-left 0.2s ease;
}
.k1-toc__link:hover { color: var(--k1-white); }
.k1-toc__link[aria-current="true"] {
  color: var(--k1-cyan);
  border-left-color: var(--k1-cyan);
  padding-left: 1.35rem;
}

/* ---------- reveal ---------- */
.k1-js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.k1-js [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ============================================================
   HEADER
   ============================================================ */
.k1-head {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(6, 11, 28, 0.94),
              rgba(6, 11, 28, 0.55) 68%, rgba(6, 11, 28, 0));
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease,
              backdrop-filter 0.3s ease;
}
.k1-head[data-stuck="true"] {
  background: rgba(6, 11, 28, 0.84);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--k1-hair);
}

.k1-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--k1-cyan), var(--k1-orange));
  pointer-events: none;
  z-index: 95;
}

.k1-skip {
  position: fixed;
  top: 0.6rem;
  left: 0.6rem;
  z-index: 120;
  transform: translateY(-180%);
  padding: 0.62rem 1rem;
  background: var(--k1-cyan);
  color: #04121A;
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: var(--k1-radius);
  transition: transform 0.2s ease;
}
.k1-skip:focus { transform: none; }

.k1-head__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(1rem, 5vw, 4rem);
  min-height: var(--k1-head-h);
  padding-block: 0.85rem;
}

.k1-head__brand { display: flex; align-items: center; min-width: 0; }

.k1-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}
.k1-brand__mark {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex: none;
  padding: 0.3rem 0.55rem 0.3rem 0.6rem;
  background: var(--k1-cyan);
  color: #04121A;
  font-family: var(--k1-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  border-radius: var(--k1-radius);
}
.k1-brand__pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #04121A;
  animation: k1-pulse 2.4s ease-in-out infinite;
}
@keyframes k1-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}
.k1-brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.25;
}
.k1-brand__name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--k1-white);
}
.k1-brand__tag {
  font-family: var(--k1-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--k1-mute);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.k1-brand--foot { align-items: flex-start; }
.k1-brand--foot .k1-brand__name { font-size: 1.12rem; }

.k1-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.4rem);
}
.k1-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.7vw, 1.6rem);
}
.k1-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.35rem 0.1rem;
  font-size: 0.88rem;
  color: var(--k1-mute);
  transition: color 0.2s ease;
}
.k1-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--k1-cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.25s ease;
}
.k1-nav__link:hover { color: var(--k1-white); }
.k1-nav__link:hover::after { transform: scaleX(1); }
.k1-nav__link[aria-current="page"] { color: var(--k1-cyan); }
.k1-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.k1-nav__link--sub {
  padding: 0.3rem 0.62rem;
  border: 1px solid var(--k1-hair);
  border-radius: 999px;
  font-family: var(--k1-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--k1-mute);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.k1-nav__link--sub::after { content: none; }
.k1-nav__link--sub:hover,
.k1-nav__link--sub[aria-current="page"] {
  color: var(--k1-cyan);
  border-color: rgba(53, 242, 214, 0.45);
}

.k1-nav__foot {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-left: clamp(0.8rem, 2vw, 1.8rem);
  border-left: 1px solid var(--k1-hair);
}

.k1-navbtn {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.72rem;
  border: 1px solid var(--k1-hair-strong);
  border-radius: var(--k1-radius);
  font-family: var(--k1-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--k1-white);
  transition: border-color 0.2s ease, color 0.2s ease;
}
.k1-navbtn:hover { border-color: var(--k1-cyan); color: var(--k1-cyan); }
.k1-navbtn__label { line-height: 1; }
.k1-navbtn__bars,
.k1-navbtn__bars::before,
.k1-navbtn__bars::after {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}
.k1-navbtn__bars { position: relative; }
.k1-navbtn__bars::before,
.k1-navbtn__bars::after {
  content: "";
  position: absolute;
  left: 0;
  transition: transform 0.22s ease;
}
.k1-navbtn__bars::before { top: -5px; }
.k1-navbtn__bars::after { top: 5px; }
.k1-navbtn[aria-expanded="true"] .k1-navbtn__bars { background: transparent; }
.k1-navbtn[aria-expanded="true"] .k1-navbtn__bars::before {
  transform: translateY(5px) rotate(45deg);
}
.k1-navbtn[aria-expanded="true"] .k1-navbtn__bars::after {
  transform: translateY(-5px) rotate(-45deg);
}

/* ============================================================
   FOOTER
   ============================================================ */
.k1-foot {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(10, 93, 87, 0.35), transparent 58%),
    linear-gradient(180deg, var(--k1-void), var(--k1-night));
  border-top: 1px solid var(--k1-hair);
  overflow: hidden;
}
.k1-foot__seam {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 190px;
  pointer-events: none;
  background: linear-gradient(100deg, rgba(53, 242, 214, 0.12),
              rgba(6, 11, 28, 0) 52%, rgba(255, 138, 61, 0.12));
  clip-path: polygon(0 0, 100% 0, 100% 32%, 0 100%);
}
.k1-foot__inner {
  padding-block: clamp(2.4rem, 6vw, 4.4rem) 1.6rem;
}
.k1-foot__cols {
  display: grid;
  grid-template-columns: 1.6fr 0.85fr 0.95fr 1.35fr;
  gap: clamp(1.6rem, 4vw, 3.4rem);
}
.k1-foot__col { min-width: 0; }
.k1-foot__col--brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.k1-foot__title {
  margin-bottom: 0.9rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--k1-grid);
  font-family: var(--k1-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--k1-mute);
}
.k1-foot__list { display: flex; flex-direction: column; gap: 0.1rem; }
.k1-foot__list--plain { gap: 0.55rem; }
.k1-foot__link {
  display: inline-block;
  padding: 0.22rem 0;
  font-size: 0.88rem;
  color: var(--k1-mute);
  transition: color 0.2s ease, transform 0.2s ease;
}
.k1-foot__link:hover {
  color: var(--k1-cyan);
  transform: translateX(4px);
}
.k1-foot__text {
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--k1-mute);
  word-break: break-word;
}
.k1-foot__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem 1.6rem;
  margin-top: clamp(2rem, 5vw, 3.4rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--k1-grid);
}
.k1-foot__legal-line {
  font-family: var(--k1-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--k1-mute);
}

/* ---------- dock ---------- */
.k1-dock {
  position: fixed;
  right: clamp(0.8rem, 2vw, 1.6rem);
  bottom: clamp(0.8rem, 2vw, 1.6rem);
  z-index: 70;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.4rem;
}
.k1-dock__link {
  padding: 0.48rem 0.82rem;
  border: 1px solid var(--k1-hair-strong);
  border-radius: 999px;
  background: rgba(6, 11, 28, 0.82);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-family: var(--k1-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--k1-white);
  transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.k1-dock__link:hover,
.k1-dock__link:focus-visible {
  color: var(--k1-cyan);
  border-color: var(--k1-cyan);
  box-shadow: 0 0 18px rgba(53, 242, 214, 0.28);
}

/* ---------- notice ---------- */
.k1-notice {
  position: fixed;
  left: 50%;
  bottom: 1.2rem;
  z-index: 72;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(620px, calc(100% - 2rem));
  padding: 0.8rem 1rem;
  background: rgba(14, 23, 52, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--k1-hair-strong);
  border-left: 3px solid var(--k1-orange);
  border-radius: var(--k1-radius);
  transform: translate(-50%, 160%);
  transition: transform 0.38s cubic-bezier(0.22, 0.9, 0.28, 1);
}
.k1-notice[data-open="true"] { transform: translate(-50%, 0); }
.k1-notice__text {
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--k1-white);
}
.k1-notice__tag {
  display: inline-block;
  margin-right: 0.45rem;
  padding: 0.1rem 0.42rem;
  background: var(--k1-orange);
  color: #1A0A00;
  font-family: var(--k1-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  border-radius: var(--k1-radius);
}
.k1-notice__acts {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: none;
}
.k1-notice__close {
  width: 2rem;
  height: 2rem;
  line-height: 1;
  font-size: 1.1rem;
  color: var(--k1-mute);
  border: 1px solid var(--k1-hair);
  border-radius: var(--k1-radius);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.k1-notice__close:hover { color: var(--k1-orange); border-color: var(--k1-orange); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1080px) {
  .k1-foot__cols { grid-template-columns: 1.4fr 1fr 1fr; }
  .k1-foot__col:last-child { grid-column: 1 / -1; }
  .k1-foot__list--plain {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.4rem 1.8rem;
  }
}

@media (max-width: 1024px) {
  .k1-navbtn { display: inline-flex; }

  .k1-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 70;
    width: min(340px, 88vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 5.6rem 1.4rem 2rem;
    background: rgba(6, 11, 28, 0.96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--k1-hair);
    overflow-y: auto;
    transform: translateX(101%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0.3s ease;
  }
  .k1-nav[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
  }

  .k1-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .k1-nav__item { border-bottom: 1px solid rgba(36, 52, 92, 0.9); }
  .k1-nav__item:last-child { border-bottom: 0; }
  .k1-nav__link {
    display: block;
    width: 100%;
    padding: 0.95rem 0.2rem;
    font-size: 1rem;
    color: var(--k1-white);
  }
  .k1-nav__link::after { content: none; }
  .k1-nav__link[aria-current="page"] {
    color: var(--k1-cyan);
    box-shadow: inset 3px 0 0 var(--k1-cyan);
    padding-left: 0.8rem;
  }

  .k1-nav__foot {
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.6rem;
    padding: 1.4rem 0 0;
    border-left: 0;
    border-top: 1px solid var(--k1-hair);
  }
}

@media (max-width: 860px) {
  :root { --k1-head-h: 68px; }
  .k1-brand__tag { display: none; }
  .k1-foot__cols { grid-template-columns: 1fr 1fr; gap: 1.8rem 1.4rem; }
  .k1-foot__col--brand { grid-column: 1 / -1; }
  .k1-foot__col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .k1-dock {
    left: 0.75rem;
    right: 0.75rem;
    bottom: 0.75rem;
    flex-direction: row;
    justify-content: space-between;
  }
  .k1-dock__link { flex: 1 1 0; text-align: center; }
  .k1-notice {
    flex-wrap: wrap;
    bottom: 4.4rem;
    padding: 0.75rem 0.85rem;
  }
  .k1-notice__acts { width: 100%; justify-content: flex-end; }
  .k1-index__row { gap: 0.35rem 0.8rem; }
  .k1-index__key { min-width: 4.2rem; }
}

@media (max-width: 560px) {
  .k1-foot__cols { grid-template-columns: 1fr; }
  .k1-foot__legal { flex-direction: column; }
  .k1-lede { font-size: 0.96rem; }
  .k1-btn { padding: 0.66rem 1rem; }
}

/* 桌面端步骤条横向展开 */
@media (min-width: 900px) {
  .k1-steps { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ---------- motion / a11y ---------- */
@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;
  }
  .k1-js [data-reveal] { opacity: 1; transform: none; }
  .k1-brand__pulse { animation: none; }
  .k1-notice { transition: none; }
}