/* =========================================================
   奇异果赛场 · 共享样式 /assets/site.css
   轨道导航 + 编号长卷 + 放射籽列母题
   ========================================================= */

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--seed);
  background-color: var(--cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

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

table {
  border-collapse: collapse;
  width: 100%;
}

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色 */
  --pulp: #38B45A;
  --pulp-deep: #2E9A4B;
  --seed: #0F2E22;
  --neon: #C8FF3D;
  --skin: #7B4B2A;
  --sand: #E7E1D6;
  --cream: #F8F5EC;
  --mint: #DFF3E3;
  --line: #1B4D38;
  --deep: #071A12;
  --mist: #E9FFB0;

  /* 尺度 */
  --rail: 248px;
  --topbar: 96px;
  --wrap-max: 1180px;

  --r-xl: 40px;
  --r-lg: 28px;
  --r-md: 18px;
  --r-pill: 999px;

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system,
    "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono",
    "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-soft: 0 18px 42px -26px rgba(15, 46, 34, 0.55);
}

/* ---------- 3. 中文排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: inherit;
}

h1 {
  font-size: clamp(36px, 6.4vw, 82px);
  line-height: 1.04;
  letter-spacing: 0.035em;
}

h2 {
  font-size: clamp(27px, 3.6vw, 46px);
  letter-spacing: 0.03em;
}

h3 {
  font-size: clamp(20px, 2.1vw, 27px);
}

h4 {
  font-size: clamp(17px, 1.5vw, 20px);
}

p {
  text-wrap: pretty;
}

.mono,
[data-mono] {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.lede {
  font-size: clamp(17px, 1.55vw, 20px);
  line-height: 1.75;
  color: rgba(15, 46, 34, 0.82);
  max-width: 62ch;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--skin);
}

.sec-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(46px, 7vw, 92px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--pulp);
  font-variant-numeric: tabular-nums;
}

.sec-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--skin);
}

/* ---------- 4. 焦点与可达性 ---------- */
:focus-visible {
  outline: 3px solid var(--pulp);
  outline-offset: 3px;
  border-radius: 8px;
}

.site-foot :focus-visible,
.band--deep :focus-visible {
  outline-color: var(--neon);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 11px 20px;
  border-radius: var(--r-pill);
  background: var(--neon);
  color: var(--seed);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-color: var(--seed);
}

/* ---------- 5. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 4.5vw, 60px);
}

.stack > * + * {
  margin-top: 18px;
}

.stack-lg > * + * {
  margin-top: 34px;
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.grid-2 {
  display: grid;
  gap: var(--col-gap, 32px);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 800px) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 6. 色带章节 ---------- */
.band {
  padding-block: clamp(52px, 7.5vw, 112px);
  position: relative;
}

.band--cream { background: var(--cream); color: var(--seed); }
.band--mint  { background: var(--mint);  color: var(--seed); }
.band--sand  { background: var(--sand);  color: var(--seed); }
.band--pulp  { background: var(--pulp);  color: var(--seed); }
.band--deep  { background: var(--deep);  color: var(--cream); }

.band--deep .sec-num,
.band--deep .sec-kicker {
  color: var(--neon);
}

.band--deep .lede {
  color: rgba(248, 245, 236, 0.82);
}

.band--pulp .sec-num {
  color: var(--seed);
  opacity: 0.32;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--r-pill);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--pulp {
  background: var(--pulp);
  color: var(--seed);
}
.btn--pulp:hover { background: var(--pulp-deep); }

.btn--neon {
  background: var(--neon);
  color: var(--seed);
}
.btn--neon:hover { background: var(--mist); }

.btn--ink {
  background: var(--seed);
  color: var(--cream);
}
.btn--ink:hover { background: var(--line); }

.btn--ghost {
  background: transparent;
  color: var(--seed);
  box-shadow: inset 0 0 0 1.5px var(--line);
}
.btn--ghost:hover { background: var(--mint); }

.btn--on-dark {
  background: transparent;
  color: var(--cream);
  box-shadow: inset 0 0 0 1.5px rgba(248, 245, 236, 0.34);
}
.btn--on-dark:hover {
  background: rgba(200, 255, 61, 0.12);
  color: var(--neon);
}

/* ---------- 8. 胶囊标签 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  background: var(--sand);
  color: var(--seed);
  white-space: nowrap;
}

.pill--neon {
  background: var(--neon);
  color: var(--seed);
}

.pill--skin {
  background: var(--skin);
  color: var(--cream);
}

/* ---------- 9. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--skin);
}

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

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

.crumbs__sep {
  color: rgba(123, 75, 42, 0.45);
}

.crumbs [aria-current="page"] {
  color: var(--seed);
  font-weight: 700;
}

/* ---------- 10. 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: var(--sand);
  aspect-ratio: 16 / 10;
  margin: 0;
}

.media > img,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.media:hover > img,
.media:hover > picture > img {
  transform: scale(1.02);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media__cap {
  position: absolute;
  left: 14px;
  bottom: 14px;
  right: 14px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  background: rgba(7, 26, 18, 0.72);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  backdrop-filter: blur(4px);
}

/* ---------- 11. 基础卡片 ---------- */
.card {
  padding: clamp(18px, 2.4vw, 26px);
  border-radius: var(--r-lg);
  background: var(--cream);
  box-shadow: var(--shadow-soft);
}

.card--sand { background: var(--sand); box-shadow: none; }
.card--mint { background: var(--mint); box-shadow: none; }
.card--deep {
  background: var(--deep);
  color: var(--cream);
  box-shadow: none;
}

/* ---------- 12. 显现动画 ---------- */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.js-ready .reveal.is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 13. 阅读进度 ---------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 95;
  pointer-events: none;
}

.read-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: var(--neon);
  box-shadow: 0 0 10px rgba(200, 255, 61, 0.55);
  transition: width 0.1s linear;
}

/* =========================================================
   14. 头部 · 移动优先
   ========================================================= */
.site-track {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  padding: 10px 12px;
}

.site-track__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 10px 9px 14px;
  background: var(--seed);
  border: 1px solid rgba(27, 77, 56, 0.9);
  border-radius: 22px;
  box-shadow: 0 16px 34px -22px rgba(7, 26, 18, 0.9);
}

/* 品牌 */
.site-track__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.site-track__mark {
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, var(--cream) 0 25%, transparent 26%),
    repeating-conic-gradient(from 0deg, var(--seed) 0deg 7deg, transparent 7deg 36deg),
    radial-gradient(circle at 50% 50%, var(--pulp) 0 70%, var(--skin) 70% 100%);
  box-shadow: 0 0 0 3px rgba(200, 255, 61, 0.16);
}

.site-track__word {
  display: block;
  min-width: 0;
}

.site-track__name {
  display: block;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.1em;
  color: var(--cream);
}

.site-track__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 9px;
  line-height: 1.5;
  letter-spacing: 0.32em;
  color: rgba(200, 255, 61, 0.72);
}

/* 移动导航按钮 */
.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: none;
  padding: 9px 15px 9px 13px;
  border-radius: var(--r-pill);
  background: rgba(200, 255, 61, 0.14);
  color: var(--cream);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  transition: background-color 0.2s var(--ease);
}

.nav-pill:hover {
  background: rgba(200, 255, 61, 0.24);
}

.nav-pill__box {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}

.nav-pill__box span {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
  transition: transform 0.24s var(--ease), opacity 0.2s var(--ease);
}

.nav-pill__box span:first-child { top: 0; }
.nav-pill__box span:last-child { bottom: 0; }

.site-track[data-open="true"] .nav-pill__box span:first-child {
  transform: translateY(5px) rotate(45deg);
}

.site-track[data-open="true"] .nav-pill__box span:last-child {
  transform: translateY(-5px) rotate(-45deg);
}

/* 导航（移动抽屉） */
.site-nav {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 8px);
  z-index: 92;
  padding: 16px 14px 14px;
  background: var(--seed);
  border: 1px solid rgba(27, 77, 56, 0.9);
  border-radius: 26px;
  box-shadow: 0 30px 60px -28px rgba(7, 26, 18, 0.95);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(0.985);
  transform-origin: top center;
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease),
    visibility 0.24s var(--ease);
}

.site-track[data-open="true"] .site-nav {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.site-nav__eyebrow {
  padding: 0 10px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(200, 255, 61, 0.65);
}

.site-nav__list {
  display: flex;
  flex-direction: column;
}

.site-nav__item + .site-nav__item {
  border-top: 1px solid rgba(27, 77, 56, 0.7);
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 12px;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(248, 245, 236, 0.82);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.site-nav__link:hover {
  color: var(--cream);
  background: rgba(56, 180, 90, 0.18);
}

.site-nav__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  opacity: 0.5;
  font-variant-numeric: tabular-nums;
}

.site-nav__text {
  display: block;
}

/* 当前页 —— 全站共用状态 */
.site-nav__link[aria-current="page"] {
  background: var(--neon);
  color: var(--seed);
}

.site-nav__link[aria-current="page"] .site-nav__num {
  color: var(--skin);
  opacity: 1;
}

/* 滚动章节高亮 */
.site-nav__link.is-current:not([aria-current="page"]) {
  color: var(--neon);
}

.site-nav__foot {
  padding: 14px 10px 4px;
  border-top: 1px solid rgba(27, 77, 56, 0.7);
  margin-top: 8px;
}

.site-nav__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(248, 245, 236, 0.45);
}

/* =========================================================
   15. 头部 · 桌面轨道
   ========================================================= */
@media (min-width: 1024px) {
  body {
    padding-left: var(--rail);
  }

  .site-track {
    top: 0;
    left: 0;
    bottom: 0;
    right: auto;
    width: var(--rail);
    padding: 0;
    background: var(--seed);
    border-right: 1px solid rgba(27, 77, 56, 0.8);
  }

  .site-track__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 26px;
    height: 100%;
    padding: 36px 18px 22px;
    background: none;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .site-track__brand {
    gap: 12px;
    padding-inline: 6px;
  }

  .site-track__name {
    font-size: 17px;
  }

  .nav-pill {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    gap: 12px;
    padding: 0;
    background: none;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }

  .site-nav__eyebrow {
    padding: 0 12px 4px;
    font-size: 10px;
    letter-spacing: 0.3em;
  }

  .site-nav__list {
    gap: 4px;
  }

  .site-nav__item + .site-nav__item {
    border-top: 0;
  }

  .site-nav__link {
    padding: 10px 13px;
    border-radius: var(--r-pill);
    font-size: 15px;
    gap: 10px;
  }

  .site-nav__link.is-current:not([aria-current="page"])::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 16px;
    border-radius: 2px;
    background: var(--neon);
    transform: translateY(-50%);
  }

  .site-nav__foot {
    margin-top: auto;
    padding: 16px 12px 0;
  }
}

/* 移动端为固定胶囊让出高度 */
@media (max-width: 1023px) {
  body {
    padding-top: var(--topbar);
  }
}

/* =========================================================
   16. 页脚
   ========================================================= */
.site-foot {
  position: relative;
  overflow: hidden;
  background: var(--deep);
  color: rgba(248, 245, 236, 0.82);
  padding-block: clamp(48px, 7vw, 88px) 26px;
}

.site-foot::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: repeating-conic-gradient(
    from 0deg,
    rgba(200, 255, 61, 0.09) 0deg 3deg,
    transparent 3deg 24deg
  );
  pointer-events: none;
}

.site-foot__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 38px 40px;
}

.site-foot__lead {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.site-foot__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--cream);
}

.site-foot__mark {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, var(--cream) 0 25%, transparent 26%),
    repeating-conic-gradient(from 0deg, var(--deep) 0deg 7deg, transparent 7deg 36deg),
    radial-gradient(circle at 50% 50%, var(--pulp) 0 70%, var(--skin) 70% 100%);
}

.site-foot__tag {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: rgba(200, 255, 61, 0.7);
}

.site-foot__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.site-foot__head {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(200, 255, 61, 0.66);
  margin-bottom: 14px;
}

.site-foot__list li + li {
  margin-top: 9px;
}

.site-foot__list a {
  font-size: 15px;
  color: rgba(248, 245, 236, 0.76);
  transition: color 0.2s var(--ease);
}

.site-foot__list a:hover {
  color: var(--neon);
}

.site-foot__list--plain li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.65;
}

.site-foot__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(200, 255, 61, 0.62);
  padding-top: 4px;
}

.site-foot__v {
  color: rgba(248, 245, 236, 0.86);
  word-break: break-word;
}

.site-foot__base {
  position: relative;
  margin-top: 42px;
  padding-top: 20px;
  border-top: 1px solid rgba(27, 77, 56, 0.85);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(248, 245, 236, 0.52);
}

.site-foot__icp {
  margin-left: auto;
}

@media (min-width: 720px) {
  .site-foot__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  }

  .site-foot__contact {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .site-foot__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.35fr) minmax(0, 1.05fr);
    gap: 56px;
  }

  .site-foot__contact {
    grid-column: auto;
  }
}

@media (max-width: 639px) {
  .site-foot__icp {
    margin-left: 0;
  }
}

/* =========================================================
   17. 降级与减弱动效
   ========================================================= */
@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;
  }

  .js-ready .reveal {
    opacity: 1;
    transform: none;
  }

  .media:hover > img,
  .media:hover > picture > img {
    transform: none;
  }

  .read-progress__bar {
    transition: none;
  }
}

@media print {
  .site-track,
  .read-progress,
  .skip-link {
    display: none !important;
  }

  body {
    padding: 0 !important;
    background: #fff;
    color: #000;
  }

  .site-foot {
    background: #fff;
    color: #000;
  }
}