/* ==========================================================================
   快盈3数据 · 共享样式表  /assets/site.css
   档案靛蓝 × 铜金 × 数据青 —— 数据档案馆与权益时间廊
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dt, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
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; }
table { border-collapse: collapse; width: 100%; }
summary { cursor: pointer; }
:focus-visible { outline: 2px solid var(--ky-cyan); outline-offset: 3px; border-radius: 4px; }

/* 2. 变量 ----------------------------------------------------------------- */
:root {
  --ky-indigo: #0E1B3A;
  --ky-indigo-deep: #16264D;
  --ky-copper: #C08A3E;
  --ky-copper-light: #E6C489;
  --ky-cyan: #2FBFB0;
  --ky-orange: #F2703A;
  --ky-paper: #F6F2E9;
  --ky-cloud: #E3E8F0;
  --ky-ink: #12161F;
  --ky-mist: #98A4BC;

  --ky-shell: 1180px;
  --ky-gutter: clamp(20px, 5vw, 64px);

  --ky-font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --ky-font-sans: "Source Han Sans SC", "Noto Sans SC", "MiSans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --ky-font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --ky-radius-card: 28px;
  --ky-radius-lg: 40px;
  --ky-radius-pill: 999px;

  --ky-ease: cubic-bezier(.22, .61, .36, 1);
  --ky-line: 1px solid rgba(192, 138, 62, .42);
  --ky-line-soft: 1px solid rgba(152, 164, 188, .24);
  --ky-shadow: 0 18px 40px -30px rgba(14, 27, 58, .45);
}

/* 3. 基础排版 ------------------------------------------------------------- */
body {
  font-family: var(--ky-font-sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: .01em;
  color: var(--ky-ink);
  background: var(--ky-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

p + p { margin-top: 1.5em; }

h1, h2, h3, h4 { text-wrap: balance; }

strong { font-weight: 700; }

::selection { background: rgba(47, 191, 176, .32); }

/* 4. 布局工具 ------------------------------------------------------------- */
.ky-shell {
  width: 100%;
  max-width: var(--ky-shell);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--ky-gutter);
  padding-right: var(--ky-gutter);
}

.ky-section {
  padding-top: clamp(56px, 8vw, 112px);
  padding-bottom: clamp(56px, 8vw, 112px);
}

.ky-section--paper { background: var(--ky-paper); color: var(--ky-ink); }
.ky-section--cloud { background: var(--ky-cloud); color: var(--ky-ink); }
.ky-section--indigo { background: var(--ky-indigo); color: var(--ky-paper); }
.ky-section--deep { background: var(--ky-indigo-deep); color: var(--ky-paper); }

.ky-section--indigo .ky-lede,
.ky-section--deep .ky-lede { color: rgba(246, 242, 233, .76); }

.ky-grid { display: grid; gap: clamp(20px, 3vw, 36px); }
.ky-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ky-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ky-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ky-grid--aside { grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); gap: clamp(28px, 5vw, 72px); }

.ky-divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(192, 138, 62, .55), transparent);
}

.ky-visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* 5. 文字组件 ------------------------------------------------------------- */
.ky-display {
  font-family: var(--ky-font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 7vw, 6.5rem);
  line-height: 1.02;
  letter-spacing: -.02em;
}

.ky-h1 {
  font-family: var(--ky-font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -.02em;
}

.ky-h2 {
  font-family: var(--ky-font-sans);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.32;
  letter-spacing: -.01em;
}

.ky-h3 {
  font-weight: 700;
  font-size: clamp(1.08rem, 1.8vw, 1.35rem);
  line-height: 1.5;
}

.ky-lede {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.9;
  color: #3C4557;
  max-width: 62ch;
}

.ky-kicker {
  display: block;
  font-family: var(--ky-font-mono);
  font-size: .78rem;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--ky-copper);
  margin-bottom: .9em;
}

.ky-num {
  font-family: var(--ky-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.ky-vertical {
  writing-mode: vertical-rl;
  font-size: .78rem;
  letter-spacing: .36em;
  color: var(--ky-mist);
}

.ky-note {
  font-size: .84rem;
  line-height: 1.85;
  color: #5A6478;
}

.ky-section--indigo .ky-note,
.ky-section--deep .ky-note { color: rgba(152, 164, 188, .95); }

/* 6. 头部 ----------------------------------------------------------------- */
.ky-skip {
  position: fixed;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  padding: 12px 24px;
  border-radius: 0 0 16px 16px;
  background: var(--ky-paper);
  color: var(--ky-indigo);
  font-size: .9rem;
  letter-spacing: .08em;
  transition: top .22s var(--ky-ease);
}
.ky-skip:focus { top: 0; }

.ky-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ky-indigo);
  color: #FFFFFF;
  border-bottom: var(--ky-line);
  transition: box-shadow .3s var(--ky-ease);
}
.ky-header.is-condensed { box-shadow: 0 14px 30px -24px rgba(0, 0, 0, .8); }

.ky-progress {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: rgba(192, 138, 62, .2);
  pointer-events: none;
  z-index: 5;
}
.ky-progress__bar {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--ky-copper), var(--ky-copper-light));
  transform-origin: 0 50%;
  transform: scaleX(var(--ky-progress, 0));
  transition: transform .15s linear;
}

.ky-header__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 18px;
  max-width: var(--ky-shell);
  margin: 0 auto;
  padding: 11px var(--ky-gutter) 0;
  max-height: 70px;
  overflow: hidden;
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--ky-mist);
  transition: max-height .35s var(--ky-ease), opacity .25s var(--ky-ease), padding .35s var(--ky-ease);
}
.ky-header__meta { white-space: nowrap; }
.ky-header.is-condensed .ky-header__top {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
}

.ky-masthead {
  max-width: var(--ky-shell);
  margin: 0 auto;
  padding: clamp(16px, 3vw, 34px) var(--ky-gutter) clamp(12px, 2vw, 22px);
  text-align: center;
  transition: padding .35s var(--ky-ease), text-align .35s var(--ky-ease);
}

.ky-masthead__eyebrow {
  max-height: 40px;
  overflow: hidden;
  margin-bottom: .7em;
  font-family: var(--ky-font-mono);
  font-size: .72rem;
  letter-spacing: .42em;
  color: var(--ky-copper);
  transition: max-height .3s var(--ky-ease), opacity .2s var(--ky-ease), margin .3s var(--ky-ease);
}

.ky-brand {
  display: inline-block;
  font-family: var(--ky-font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 7.2vw, 4.6rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: #FFFFFF;
  transition: font-size .35s var(--ky-ease);
}
.ky-brand:hover { color: var(--ky-copper-light); }

.ky-masthead__tagline {
  max-height: 44px;
  overflow: hidden;
  margin-top: .8em;
  font-size: .88rem;
  letter-spacing: .22em;
  color: var(--ky-copper-light);
  transition: max-height .3s var(--ky-ease), opacity .2s var(--ky-ease), margin .3s var(--ky-ease);
}

.ky-header.is-condensed .ky-masthead {
  text-align: left;
  padding: 10px var(--ky-gutter) 6px;
}
.ky-header.is-condensed .ky-masthead__eyebrow,
.ky-header.is-condensed .ky-masthead__tagline {
  max-height: 0;
  opacity: 0;
  margin: 0;
}
.ky-header.is-condensed .ky-brand { font-size: clamp(1.4rem, 3vw, 2rem); }

.ky-navwrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px clamp(16px, 3vw, 40px);
  max-width: var(--ky-shell);
  margin: 0 auto;
  padding: 0 var(--ky-gutter) 14px;
}

.ky-nav { display: block; order: 1; }

.ky-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(10px, 2.4vw, 32px);
}

.ky-nav__item { display: block; }

.ky-nav__link {
  position: relative;
  display: inline-block;
  padding: 14px 2px;
  font-size: .95rem;
  letter-spacing: .14em;
  color: var(--ky-mist);
  transition: color .25s var(--ky-ease);
}
.ky-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 8px;
  height: 1px;
  background: var(--ky-copper);
  transform: scaleX(0);
  transform-origin: 50% 50%;
  transition: transform .3s var(--ky-ease);
}
.ky-nav__link:hover,
.ky-nav__link:focus-visible { color: #FFFFFF; }
.ky-nav__link:hover::after,
.ky-nav__link:focus-visible::after { transform: scaleX(1); }
.ky-nav__link[aria-current="page"] { color: var(--ky-copper-light); }
.ky-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--ky-copper-light);
}

.ky-navtoggle {
  display: none;
  order: 1;
  align-items: center;
  gap: 10px;
  padding: .62em 1.15em;
  border-radius: var(--ky-radius-pill);
  border: 1px solid rgba(230, 196, 137, .5);
  color: var(--ky-copper-light);
  font-size: .85rem;
  letter-spacing: .16em;
  transition: background .25s var(--ky-ease);
}
.ky-navtoggle:hover { background: rgba(230, 196, 137, .12); }
.ky-navtoggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 1px;
  background: currentColor;
}
.ky-navtoggle__bars::before,
.ky-navtoggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: transform .25s var(--ky-ease);
}
.ky-navtoggle__bars::before { top: -5px; }
.ky-navtoggle__bars::after { top: 5px; }
.ky-navtoggle__label { display: inline-block; }

/* 7. 按钮 ----------------------------------------------------------------- */
.ky-cta {
  display: inline-flex;
  order: 2;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .72em 1.55em;
  border-radius: var(--ky-radius-pill);
  border: 1px solid var(--ky-copper);
  background: linear-gradient(180deg, rgba(192, 138, 62, .18), rgba(192, 138, 62, .04));
  color: var(--ky-copper-light);
  font-size: .9rem;
  letter-spacing: .14em;
  white-space: nowrap;
  transition: background .25s var(--ky-ease), color .25s var(--ky-ease), transform .25s var(--ky-ease), border-color .25s var(--ky-ease);
}
.ky-cta:hover,
.ky-cta:focus-visible {
  background: var(--ky-copper);
  border-color: var(--ky-copper);
  color: var(--ky-indigo);
  transform: translateY(-1px);
}
.ky-cta--solid {
  background: var(--ky-copper);
  color: var(--ky-indigo);
}
.ky-cta--solid:hover { background: var(--ky-copper-light); border-color: var(--ky-copper-light); }

/* 8. 通用组件 ------------------------------------------------------------- */
.ky-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6em;
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--ky-mist);
  padding-top: 26px;
}
.ky-crumb a:hover { color: var(--ky-copper); }
.ky-crumb__sep { opacity: .55; }

.ky-card {
  display: block;
  padding: clamp(22px, 3vw, 34px);
  border-radius: var(--ky-radius-card);
  background: #FFFFFF;
  border: 1px solid rgba(18, 22, 31, .07);
  box-shadow: var(--ky-shadow);
  transition: transform .3s var(--ky-ease), box-shadow .3s var(--ky-ease);
}
.ky-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 50px -32px rgba(14, 27, 58, .55);
}

.ky-panel {
  padding: clamp(24px, 3.5vw, 42px);
  border-radius: var(--ky-radius-lg);
  background: var(--ky-indigo-deep);
  color: var(--ky-paper);
  border: 1px solid rgba(192, 138, 62, .28);
}

.ky-tag {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .42em 1.05em;
  border-radius: var(--ky-radius-pill);
  border: 1px solid rgba(192, 138, 62, .5);
  background: rgba(192, 138, 62, .08);
  color: var(--ky-copper);
  font-size: .78rem;
  letter-spacing: .12em;
  line-height: 1.6;
}
.ky-tag--cyan {
  border-color: rgba(47, 191, 176, .5);
  background: rgba(47, 191, 176, .1);
  color: #1F8C81;
}
.ky-tag--orange {
  border-color: rgba(242, 112, 58, .5);
  background: rgba(242, 112, 58, .1);
  color: #C24E1F;
}
.ky-section--indigo .ky-tag,
.ky-section--deep .ky-tag { color: var(--ky-copper-light); }

/* 9. 图片容器基础规则（页面阶段放置真实图片） ----------------------------- */
.ky-figure { display: block; margin: 0; }

.ky-figure__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--ky-radius-card);
  border: 1px solid rgba(192, 138, 62, .28);
  background: linear-gradient(140deg, #16264D 0%, #0E1B3A 100%);
  aspect-ratio: 16 / 9;
}
.ky-figure__frame--wide { aspect-ratio: 21 / 9; }
.ky-figure__frame--portrait { aspect-ratio: 4 / 5; }
.ky-figure__frame--square { aspect-ratio: 1 / 1; }

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

.ky-figure__plot {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(230, 196, 137, .14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 196, 137, .14) 1px, transparent 1px);
  background-size: 46px 46px;
}

.ky-figure__cap {
  margin-top: .85em;
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--ky-mist);
}

/* 10. 页脚 ---------------------------------------------------------------- */
.ky-footer {
  background: var(--ky-indigo);
  color: var(--ky-mist);
  border-top: var(--ky-line);
  padding: clamp(48px, 7vw, 88px) 0 28px;
}

.ky-footer__inner {
  max-width: var(--ky-shell);
  margin: 0 auto;
  padding-left: var(--ky-gutter);
  padding-right: var(--ky-gutter);
}

.ky-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.35fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: clamp(32px, 4vw, 56px);
  border-bottom: var(--ky-line);
}

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

.ky-footer__brand {
  font-family: var(--ky-font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: #FFFFFF;
}

.ky-footer__line {
  margin-top: .85em;
  font-size: .9rem;
  line-height: 1.85;
  color: rgba(246, 242, 233, .72);
}
.ky-footer__line--dim {
  font-family: var(--ky-font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--ky-mist);
}

.ky-footer__title {
  margin-bottom: 1.2em;
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .34em;
  color: var(--ky-copper);
}

.ky-footer__links li + li { margin-top: .72em; }
.ky-footer__links a {
  font-size: .92rem;
  color: rgba(246, 242, 233, .78);
  transition: color .2s var(--ky-ease);
}
.ky-footer__links a:hover,
.ky-footer__links a:focus-visible { color: var(--ky-copper-light); }

.ky-footer__contact {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 9px 16px;
  font-size: .88rem;
}
.ky-footer__contact dt {
  padding-top: .18em;
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--ky-copper);
}
.ky-footer__contact dd {
  font-family: var(--ky-font-mono);
  font-size: .82rem;
  line-height: 1.8;
  color: rgba(246, 242, 233, .82);
  overflow-wrap: anywhere;
}

.ky-footer__note {
  font-size: .88rem;
  line-height: 1.9;
  color: rgba(246, 242, 233, .74);
}
.ky-footer__note + .ky-footer__note { margin-top: .9em; }
.ky-footer__note--accent { color: var(--ky-copper-light); }

.ky-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  padding-top: 22px;
  font-size: .78rem;
  letter-spacing: .05em;
}

.ky-footer__copy { color: var(--ky-mist); }

.ky-footer__legal { display: flex; flex-wrap: wrap; gap: 20px; }
.ky-footer__legal a {
  color: var(--ky-mist);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(152, 164, 188, .45);
  transition: color .2s var(--ky-ease);
}
.ky-footer__legal a:hover,
.ky-footer__legal a:focus-visible { color: var(--ky-copper-light); }

/* 11. 显现动效协议 --------------------------------------------------------- */
[data-reveal] {
  transition: opacity .42s ease-out, transform .42s ease-out;
}
.ky-reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}
.ky-reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 12. 响应式 --------------------------------------------------------------- */
@media (max-width: 1080px) {
  .ky-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ky-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ky-grid--aside { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 96px; }

  .ky-navwrap {
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 12px;
  }

  .ky-navtoggle { display: inline-flex; order: 1; }
  .ky-cta { order: 2; }

  .ky-nav {
    order: 3;
    flex-basis: 100%;
    display: none;
  }
  .ky-nav[data-open] {
    display: block;
    margin-top: 8px;
    padding-top: 8px;
    border-top: var(--ky-line-soft);
  }

  .ky-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .ky-nav__link {
    display: block;
    padding: 14px 4px;
    border-bottom: 1px solid rgba(152, 164, 188, .16);
    letter-spacing: .1em;
  }
  .ky-nav__link::after { bottom: 0; }

  .ky-header.is-condensed .ky-masthead { padding: 8px var(--ky-gutter) 4px; }

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

@media (max-width: 720px) {
  body { font-size: 16px; }

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

  .ky-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .ky-footer__base { flex-direction: column; align-items: flex-start; }

  .ky-masthead__tagline { letter-spacing: .14em; font-size: .82rem; }
  .ky-header__top { font-size: 11.5px; letter-spacing: .1em; }
}

@media (max-width: 420px) {
  .ky-navtoggle__label { display: none; }
  .ky-cta { font-size: .84rem; letter-spacing: .1em; padding: .66em 1.15em; }
  .ky-vertical { writing-mode: horizontal-tb; letter-spacing: .2em; }
}

/* 13. 动效偏好 ------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  [data-reveal],
  .ky-reveal-ready [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .ky-card:hover,
  .ky-cta:hover { transform: none; }
}