/* =========================================================
   奇异果中心 · 共享样式 /assets/site.css
   果肉绿 + 果皮褐 + 籽粒黑，直角、细线、精密网格
   ========================================================= */

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

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

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

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

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

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

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

/* ---------- 2. 设计变量 ---------- */
:root {
  --kw-green: #8FBF3F;
  --kw-green-soft: #D9EDA6;
  --kw-brown: #6A4326;
  --kw-brown-deep: #3B2617;
  --kw-seed: #14110D;
  --kw-white: #FDFDF7;
  --kw-warm: #EDE7DE;
  --kw-cyan: #CFE3DC;
  --kw-amber: #E3A537;
  --kw-moss: #2E6B5C;
  --kw-line: #D6CFC3;

  --kw-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --kw-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --kw-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --kw-kai: "KaiTi", "STKaiti", "Kaiti SC", serif;

  --kw-shell: 1200px;
  --kw-gutter: clamp(16px, 4vw, 40px);
  --kw-rhythm: clamp(56px, 8vw, 104px);
  --kw-topbar-max: 120px;
}

/* ---------- 3. 中文排版基调 ---------- */
body {
  background: var(--kw-white);
  color: var(--kw-seed);
  font-family: var(--kw-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: .01em;
}

h1, h2, h3, h4 {
  font-family: var(--kw-serif);
  color: var(--kw-brown-deep);
  font-weight: 700;
  line-height: 1.24;
}

:focus-visible {
  outline: 2px solid var(--kw-moss);
  outline-offset: 2px;
}

.kw-topbar :focus-visible,
.kw-footer :focus-visible,
.kw-section--brown :focus-visible { outline-color: var(--kw-amber); }

/* ---------- 4. 外壳 / 容器 ---------- */
.kw-shell {
  width: 100%;
  max-width: var(--kw-shell);
  margin-inline: auto;
  padding-inline: var(--kw-gutter);
}

.kw-main { display: block; }

/* ---------- 5. 跳转链接 ---------- */
.kw-skip {
  position: fixed;
  left: 16px;
  top: -72px;
  z-index: 300;
  background: var(--kw-seed);
  color: var(--kw-white);
  border: 2px solid var(--kw-amber);
  padding: 10px 16px;
  font-size: 14px;
  transition: top .18s ease;
}
.kw-skip:focus { top: 12px; }

/* ---------- 6. 页头 ---------- */
.kw-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--kw-white);
  border-bottom: 1px solid var(--kw-line);
}

/* 6.1 品牌说明层 */
.kw-topbar {
  background: var(--kw-seed);
  color: var(--kw-white);
  max-height: var(--kw-topbar-max);
  overflow: hidden;
  transition: max-height .24s ease, opacity .18s ease;
}
.kw-topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(14px, 3vw, 40px);
  min-height: 60px;
  padding-block: 10px;
}
.kw-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.kw-brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  background: var(--kw-green);
}
.kw-brand__mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--kw-seed);
}
.kw-brand__name {
  font-family: var(--kw-serif);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .06em;
  color: var(--kw-white);
  white-space: nowrap;
}
.kw-brand__line {
  padding-left: 12px;
  border-left: 1px solid rgba(253, 253, 247, .24);
  font-size: 13px;
  color: var(--kw-green-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.kw-topbar__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px clamp(12px, 2vw, 26px);
  font-family: var(--kw-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(253, 253, 247, .72);
}
.kw-meta { display: inline-flex; align-items: baseline; gap: 6px; white-space: nowrap; }
.kw-meta__key { color: rgba(253, 253, 247, .52); }
.kw-meta__val { color: var(--kw-green-soft); }

/* 6.2 栏目层 */
.kw-botbar { background: var(--kw-white); }
.kw-botbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-block: 2px;
}
.kw-nav { display: block; }
.kw-nav__list { display: flex; align-items: center; flex-wrap: wrap; gap: 2px; }
.kw-nav__link {
  position: relative;
  display: block;
  padding: 16px 14px;
  font-size: 15.5px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--kw-brown-deep);
  transition: color .16s ease, background-color .16s ease;
}
.kw-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 9px;
  height: 2px;
  background: var(--kw-amber);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .18s ease;
}
.kw-nav__link:hover,
.kw-nav__link:focus-visible {
  color: var(--kw-seed);
  background: var(--kw-green-soft);
}
.kw-nav__link:hover::after,
.kw-nav__link:focus-visible::after { transform: scaleX(1); }
.kw-nav__link[aria-current="page"] { color: var(--kw-seed); font-weight: 700; }
.kw-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.kw-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* 6.3 移动端按钮 */
.kw-navtoggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid var(--kw-line);
  color: var(--kw-brown-deep);
  font-size: 14px;
  cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease;
}
.kw-navtoggle:hover { background: var(--kw-green-soft); border-color: var(--kw-green); }
.kw-navtoggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
}
.kw-navtoggle__bars::before,
.kw-navtoggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .18s ease, opacity .18s ease;
}
.kw-navtoggle__bars::before { top: -6px; }
.kw-navtoggle__bars::after { top: 6px; }
.kw-navtoggle[aria-expanded="true"] .kw-navtoggle__bars { background: transparent; }
.kw-navtoggle[aria-expanded="true"] .kw-navtoggle__bars::before { transform: translateY(6px) rotate(45deg); }
.kw-navtoggle[aria-expanded="true"] .kw-navtoggle__bars::after { transform: translateY(-6px) rotate(-45deg); }
.kw-navtoggle__text {
  font-family: var(--kw-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
}

/* 6.4 滚动进度线 */
.kw-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--kw-amber);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- 7. 页脚 ---------- */
.kw-footer {
  background: var(--kw-brown);
  color: rgba(253, 253, 247, .82);
  font-size: 15px;
  padding-block: clamp(44px, 6vw, 76px) 26px;
}
.kw-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  padding-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid rgba(253, 253, 247, .2);
}
.kw-footer__brand { min-width: 0; }
.kw-footer__signature {
  font-family: var(--kw-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--kw-white);
}
.kw-footer__note {
  margin-top: 12px;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(253, 253, 247, .68);
}
.kw-footer__col { min-width: 0; }
.kw-footer__title {
  font-family: var(--kw-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--kw-green-soft);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(253, 253, 247, .2);
}
.kw-footer__list { display: flex; flex-direction: column; gap: 2px; }
.kw-footer__link {
  position: relative;
  display: inline-block;
  padding-block: 4px;
  color: rgba(253, 253, 247, .82);
  transition: color .16s ease;
}
.kw-footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 1px;
  background: var(--kw-green);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .18s ease;
}
.kw-footer__link:hover,
.kw-footer__link:focus-visible { color: var(--kw-white); }
.kw-footer__link:hover::after,
.kw-footer__link:focus-visible::after { transform: scaleX(1); }

.kw-footer__contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px 28px;
  padding-block: clamp(20px, 3vw, 30px);
  border-bottom: 1px solid rgba(253, 253, 247, .2);
}
.kw-contact {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--kw-mono);
  font-size: 13px;
  letter-spacing: .04em;
}
.kw-contact__key { color: rgba(253, 253, 247, .52); }
.kw-contact__val { color: var(--kw-green-soft); word-break: break-all; }

.kw-copy {
  padding: 3px 8px;
  background: transparent;
  border: 1px solid rgba(253, 253, 247, .3);
  color: var(--kw-green-soft);
  font-family: var(--kw-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}
.kw-copy:hover { background: rgba(253, 253, 247, .12); border-color: var(--kw-green-soft); }
.kw-copy[data-copied="true"] { border-color: var(--kw-amber); color: var(--kw-amber); }

.kw-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 20px;
  font-family: var(--kw-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(253, 253, 247, .62);
}
.kw-footer__line { min-width: 0; }

/* ---------- 8. 通用排版组件 ---------- */
.kw-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--kw-mono);
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--kw-moss);
}
.kw-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--kw-amber);
}

.kw-display {
  font-family: var(--kw-serif);
  font-size: clamp(2.75rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--kw-brown-deep);
}
.kw-h1 { font-size: clamp(2.25rem, 4vw, 3.5rem); font-weight: 800; }
.kw-h2 { font-size: clamp(1.75rem, 2.6vw, 2.25rem); }
.kw-h3 { font-size: clamp(1.25rem, 1.8vw, 1.5rem); }

.kw-lede {
  max-width: 40em;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.75;
  color: var(--kw-brown);
}
.kw-text { max-width: 40em; color: var(--kw-seed); }
.kw-text + .kw-text { margin-top: 1em; }
.kw-num {
  font-family: var(--kw-mono);
  font-size: .86em;
  letter-spacing: .04em;
  color: var(--kw-moss);
}
.kw-link {
  color: var(--kw-moss);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .16s ease;
}
.kw-link:hover { color: var(--kw-brown-deep); }
.kw-note {
  padding-left: 14px;
  border-left: 2px solid var(--kw-green);
  font-family: var(--kw-kai);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--kw-moss);
}
.kw-rule {
  border: 0;
  height: 1px;
  background: var(--kw-line);
  margin-block: clamp(24px, 4vw, 40px);
}

/* ---------- 9. 按钮 ---------- */
.kw-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  font-family: var(--kw-sans);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .14s ease, background-color .16s ease, color .16s ease, border-color .16s ease;
}
.kw-btn--solid { background: var(--kw-green); border-color: var(--kw-green); color: var(--kw-seed); }
.kw-btn--solid:hover { background: var(--kw-brown-deep); border-color: var(--kw-brown-deep); color: var(--kw-white); transform: translateY(-2px); }
.kw-btn--ghost { background: transparent; border-color: var(--kw-line); color: var(--kw-brown-deep); }
.kw-btn--ghost:hover { border-color: var(--kw-moss); color: var(--kw-moss); transform: translateY(-2px); }
.kw-btn--amber { background: var(--kw-amber); border-color: var(--kw-amber); color: var(--kw-seed); }
.kw-btn--amber:hover { background: var(--kw-seed); border-color: var(--kw-seed); color: var(--kw-white); transform: translateY(-2px); }
.kw-cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 10. 分区与网格 ---------- */
.kw-section { padding-block: var(--kw-rhythm); }
.kw-section--warm { background: var(--kw-warm); }
.kw-section--cyan { background: var(--kw-cyan); }
.kw-section--green { background: var(--kw-green); color: var(--kw-seed); }
.kw-section--brown { background: var(--kw-brown); color: var(--kw-white); }
.kw-section--brown .kw-h1,
.kw-section--brown .kw-h2,
.kw-section--brown .kw-h3 { color: var(--kw-white); }

.kw-grid { display: grid; gap: clamp(16px, 2.4vw, 32px); }
.kw-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.kw-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kw-grid--split { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }

.kw-slab {
  border-top: 2px solid var(--kw-seed);
  padding-top: 18px;
  background: transparent;
}
.kw-slab--green {
  background: var(--kw-green);
  border-top-color: var(--kw-brown-deep);
  padding: clamp(18px, 2.4vw, 28px);
}
.kw-slab--warm {
  background: var(--kw-warm);
  border-top-color: var(--kw-line);
  padding: clamp(18px, 2.4vw, 28px);
}

.kw-tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--kw-line);
  background: var(--kw-warm);
  color: var(--kw-brown);
  font-family: var(--kw-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
}
.kw-tag--green { background: var(--kw-green-soft); border-color: var(--kw-green); color: var(--kw-brown-deep); }
.kw-tag--moss { background: transparent; border-color: var(--kw-moss); color: var(--kw-moss); }
.kw-tag--amber { background: var(--kw-amber); border-color: var(--kw-amber); color: var(--kw-seed); }

/* ---------- 11. 面包屑 ---------- */
.kw-breadcrumb {
  padding-block: 14px;
  border-bottom: 1px solid var(--kw-line);
}
.kw-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--kw-mono);
  font-size: 13px;
  letter-spacing: .04em;
}
.kw-breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; color: var(--kw-brown); }
.kw-breadcrumb__item + .kw-breadcrumb__item::before { content: "/"; color: var(--kw-line); }
.kw-breadcrumb__link { color: var(--kw-moss); border-bottom: 1px solid transparent; }
.kw-breadcrumb__link:hover { border-bottom-color: var(--kw-moss); }
.kw-breadcrumb__item[aria-current="page"] { color: var(--kw-seed); }

/* ---------- 12. 图片容器 ---------- */
.kw-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--kw-warm);
  border: 1px solid var(--kw-line);
}
.kw-media img { width: 100%; height: 100%; object-fit: cover; }
.kw-media--wide { aspect-ratio: 16 / 9; }
.kw-media--square { aspect-ratio: 1 / 1; }
.kw-media--tall { aspect-ratio: 3 / 4; }
.kw-media__cap {
  margin-top: 8px;
  font-family: var(--kw-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--kw-brown);
}
.kw-media__badge {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 4px 10px;
  background: var(--kw-seed);
  color: var(--kw-green-soft);
  font-family: var(--kw-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
}

/* ---------- 13. 渐显 ---------- */
.kw-reveal { opacity: 1; transform: none; }
.kw-js .kw-reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .4s ease, transform .4s ease;
}
.kw-js .kw-reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1000px) {
  .kw-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  :root { --kw-topbar-max: 200px; }

  .kw-topbar__inner {
    min-height: 0;
    flex-wrap: wrap;
    gap: 10px;
    padding-block: 12px;
  }
  .kw-brand__line { display: none; }
  .kw-topbar__meta { font-size: 12px; }

  .kw-botbar__inner { flex-wrap: wrap; gap: 12px; padding-block: 8px; }
  .kw-navtoggle { display: inline-flex; order: 1; margin-left: auto; }
  .kw-header__actions { display: none; }

  .kw-nav {
    order: 2;
    display: none;
    width: 100%;
    margin-top: 6px;
    border-top: 1px solid var(--kw-line);
  }
  .kw-nav[data-open] { display: block; }
  .kw-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .kw-nav__link {
    padding: 14px 4px;
    border-bottom: 1px solid var(--kw-line);
    font-size: 16px;
  }
  .kw-nav__link::after { left: 4px; right: auto; width: 26px; bottom: 10px; }
  .kw-nav[data-open] ~ .kw-header__actions {
    display: flex;
    order: 3;
    width: 100%;
    flex-wrap: wrap;
    padding-bottom: 12px;
  }

  .kw-grid--3,
  .kw-grid--split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .kw-grid--2 { grid-template-columns: minmax(0, 1fr); }
  .kw-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .kw-footer__legal { flex-direction: column; }
  .kw-btn { padding: 10px 14px; font-size: 14px; }
}

/* 滚动收起的品牌说明层（置于断点之后以保证优先级） */
.kw-header[data-condensed] .kw-topbar { max-height: 0; opacity: 0; }
.kw-header[data-condensed] .kw-nav__link { padding-block: 13px; }

/* ---------- 15. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .kw-js .kw-reveal,
  .kw-reveal { opacity: 1 !important; transform: none !important; }
  .kw-btn:hover { transform: none; }
}