/* =========================================================
   STAKE站 · shared site kit
   /assets/site.css
   深墨绿骨架 + 纸白阅读面 + 信号橙路径指示
   ========================================================= */

:root {
  --ink-900: #0B1F1A;
  --ink-800: #102A23;
  --ink-700: #173A30;
  --signal: #FF6B2C;
  --signal-deep: #C2410C;
  --slate-300: #A9BCC6;
  --slate-500: #6F8792;
  --paper: #F2F0E9;
  --line: #2B463D;
  --ok: #3E8E6E;

  --font-display: "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", SFMono-Regular, Consolas, monospace;

  --gutter: clamp(16px, 4.5vw, 56px);
  --maxw: 1440px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 220ms;
  --hair: 1px solid var(--line);
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: var(--ink-900);
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, picture { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

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

::selection { background: var(--signal); color: #120b06; }

#main-content { scroll-margin-top: 104px; }

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.25;
  text-wrap: balance;
}

h1 { font-size: clamp(2.4rem, 5vw, 4.8rem); letter-spacing: -.04em; line-height: 1.08; }
h2 { font-size: clamp(1.5rem, 2.4vw, 2.2rem); }
h3 { font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height: 1.35; }

p { text-wrap: pretty; }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  transform: translateY(-140%);
  background: var(--signal);
  color: #120b06;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 11px 20px;
  text-decoration: none;
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* =========================================================
   页头 · 工程导轨
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink-900);
  color: var(--paper);
  border-bottom: var(--hair);
}

/* 顶部刻度齿 */
.site-header::before {
  content: "";
  display: block;
  height: 6px;
  background-image: repeating-linear-gradient(
    to right,
    var(--line) 0 1px,
    transparent 1px 14px
  );
  background-position: 0 0;
  border-bottom: 1px solid rgba(43, 70, 61, .5);
}

.site-header__bar {
  position: relative;
  max-width: var(--maxw);
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2.2vw, 36px);
  padding: 11px var(--gutter);
  min-height: 66px;
}

/* ---------- 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--paper);
  min-width: 0;
}

.brand__mark {
  position: relative;
  width: 28px;
  height: 28px;
  flex: none;
  border: var(--hair);
  background: var(--ink-800);
  transition: border-color var(--dur) var(--ease);
}
.brand__mark::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 7px;
  width: 12px;
  height: 1px;
  background: var(--slate-300);
  box-shadow: 0 5px 0 var(--slate-300), 0 10px 0 rgba(169, 188, 198, .45);
}
.brand__mark::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 6px;
  height: 6px;
  background: var(--signal);
}
.brand:hover .brand__mark { border-color: var(--signal); }

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
  min-width: 0;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -.02em;
  white-space: nowrap;
}
.brand__line {
  font-size: .7rem;
  letter-spacing: .04em;
  color: var(--slate-500);
  white-space: nowrap;
}

/* ---------- 主导航 ---------- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.site-nav__index {
  flex: none;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--slate-500);
  white-space: nowrap;
  padding-right: 14px;
  border-right: var(--hair);
}

.site-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
  min-width: 0;
}

.site-nav__link {
  display: block;
  padding: 8px 12px;
  font-size: .9rem;
  line-height: 1.3;
  color: var(--slate-300);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.site-nav__link:hover {
  color: var(--paper);
  background: var(--ink-800);
  border-color: var(--line);
}
.site-nav__link[aria-current="page"] {
  color: var(--paper);
  background: var(--ink-700);
  border-color: var(--line);
  box-shadow: inset 2px 0 0 var(--signal);
}

/* ---------- 右侧动作区 ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

.version-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--slate-300);
  border: var(--hair);
  background: var(--ink-800);
  padding: 5px 9px;
  border-radius: 2px;
  white-space: nowrap;
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border: var(--hair);
  border-radius: 2px;
  background: var(--ink-800);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .12em;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.nav-toggle:hover { background: var(--ink-700); border-color: var(--slate-500); }
.nav-toggle:focus-visible { outline-offset: 2px; }

.nav-toggle__bars {
  width: 14px;
  height: 10px;
  flex: none;
  background-image:
    linear-gradient(var(--signal), var(--signal)),
    linear-gradient(var(--slate-300), var(--slate-300)),
    linear-gradient(var(--slate-300), var(--slate-300));
  background-size: 14px 1.5px, 14px 1.5px, 14px 1.5px;
  background-position: 0 0, 0 4.5px, 0 9px;
  background-repeat: no-repeat;
}

.nav-toggle__label { white-space: nowrap; }

/* ---------- 滚动路径进度线 ---------- */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
  z-index: 3;
}
.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: var(--signal);
  transition: width 120ms linear;
}

/* =========================================================
   页脚 · 信息底仓
   ========================================================= */
.site-footer {
  background: var(--ink-900);
  color: var(--paper);
  border-top: var(--hair);
  position: relative;
}

.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background-image: repeating-linear-gradient(
    to right,
    var(--line) 0 1px,
    transparent 1px 14px
  );
}

.footer-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(28px, 4vw, 52px) var(--gutter) clamp(18px, 2.5vw, 28px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.footer-note {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate-500);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 4px;
  border-top: var(--hair);
  margin-top: 2px;
}

.contact-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  font-size: 14px;
}
.contact-line__k {
  flex: none;
  width: 2.8em;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate-500);
}
.contact-line__v {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .01em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--slate-300);
  background: var(--ink-800);
  border: var(--hair);
  border-radius: 2px;
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.copy-btn:hover { color: var(--paper); border-color: var(--signal); }
.copy-btn.is-copied {
  color: #120b06;
  background: var(--signal);
  border-color: var(--signal);
}

/* ---------- 信息底仓面板 ---------- */
.footer-vault {
  border: var(--hair);
  background: var(--ink-800);
  border-radius: 2px;
  min-width: 0;
  overflow: hidden;
}

.vault-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  background: var(--ink-700);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .16em;
  text-align: left;
  transition: background-color var(--dur) var(--ease);
}
.vault-toggle:hover { background: #1D4438; }

.vault-toggle__label { white-space: nowrap; }

.vault-toggle__icon {
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
}
.vault-toggle__icon::before,
.vault-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5.5px;
  width: 12px;
  height: 1px;
  background: var(--signal);
  transition: transform var(--dur) var(--ease);
}
.vault-toggle__icon::after { transform: rotate(90deg); }
.footer-vault[data-open] .vault-toggle__icon::after { transform: rotate(0deg); }

.vault-panel {
  padding: 4px 16px 14px;
  border-top: var(--hair);
  animation: vault-in var(--dur) var(--ease) both;
}
.vault-panel[hidden] { display: none; }

@keyframes vault-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.vault-row {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: 4px 14px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(43, 70, 61, .7);
}
.vault-row:last-child { border-bottom: 0; padding-bottom: 4px; }

.vault-row__k {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--slate-500);
  padding-top: 3px;
}
.vault-row__v {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-300);
}

.fee-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}
.fee-item {
  font-size: 13px;
  color: var(--slate-300);
  white-space: nowrap;
}

/* ---------- 页脚底栏 ---------- */
.footer-bottom {
  margin-top: clamp(24px, 3.5vw, 40px);
  padding-top: 16px;
  border-top: var(--hair);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  font-size: 12px;
  color: var(--slate-500);
}

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--slate-500);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-legal a {
  color: var(--slate-300);
  text-decoration: none;
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.footer-legal a:hover {
  color: var(--paper);
  border-bottom-color: var(--signal);
}

.footer-copy {
  margin-left: auto;
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

/* =========================================================
   共享组件
   ========================================================= */

/* 容器与节奏 */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 6vw, 88px); }

.surface-paper {
  background: var(--paper);
  color: var(--ink-900);
}
.surface-paper a { color: var(--ink-900); }
.surface-paper .num { color: var(--signal-deep); }
.surface-paper .eyebrow { color: var(--slate-500); }
.surface-paper .tag {
  background: rgba(11, 31, 26, .04);
  border-color: rgba(11, 31, 26, .18);
  color: var(--ink-700);
}
.surface-paper .rule { background: rgba(11, 31, 26, .16); }

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

/* 栏目名标签 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--slate-500);
  text-transform: none;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  flex: none;
  background: var(--signal);
}

/* 数字路径强调 */
.num {
  font-family: var(--font-mono);
  font-style: normal;
  font-weight: 700;
  font-size: 1.12em;
  letter-spacing: -.01em;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

/* 展览标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate-300);
  background: var(--ink-800);
  border: var(--hair);
  border-radius: 2px;
  white-space: nowrap;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.3;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--paper);
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.btn:hover { border-color: var(--slate-500); background: var(--ink-800); }
.btn:active { transform: translateY(1px); }

.btn--signal {
  background: var(--signal);
  color: #14100D;
  border-color: var(--signal);
}
.btn--signal:hover {
  background: #FF824F;
  border-color: #FF824F;
  color: #14100D;
}

.btn--ghost {
  background: var(--ink-800);
  color: var(--paper);
  border-color: var(--line);
}
.btn--ghost:hover {
  background: var(--ink-700);
  border-color: var(--signal);
}

.btn--sm {
  padding: 8px 13px;
  font-size: .8rem;
}

.btn--block { width: 100%; }

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate-500);
}
.breadcrumb a {
  color: var(--slate-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.breadcrumb a:hover { color: var(--paper); border-bottom-color: var(--signal); }
.breadcrumb__sep { color: var(--line); }

/* 网格 */
.grid {
  display: grid;
  gap: clamp(16px, 2.5vw, 32px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* 图片容器基础规则（页面阶段放置占位或内联 SVG） */
.figure {
  position: relative;
  margin: 0;
  border: var(--hair);
  background: var(--ink-800);
  border-radius: 2px;
  overflow: hidden;
}
.figure--16x9 { aspect-ratio: 16 / 9; }
.figure--4x3  { aspect-ratio: 4 / 3; }
.figure--1x1  { aspect-ratio: 1 / 1; }

.figure > img,
.figure > svg,
.figure > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__ph {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--slate-500);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-align: center;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(169, 188, 198, .08) 0 1px,
    transparent 1px 12px
  );
}

.figure__caption {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate-500);
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1240px) {
  .site-nav__index { display: none; }
}

@media (max-width: 1080px) {
  .site-header__bar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand actions"
      "nav nav";
    gap: 0 12px;
    padding-block: 11px;
  }
  .brand { grid-area: brand; }
  .header-actions { grid-area: actions; }
  .site-nav { grid-area: nav; }

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-top: 10px;
    padding: 10px 0 14px;
    border-top: var(--hair);
  }
  .site-header[data-open] .site-nav { display: flex; }

  .site-nav__index {
    display: block;
    padding: 0 0 9px;
    margin-bottom: 8px;
    border-right: 0;
    border-bottom: var(--hair);
    font-size: 11px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    padding: 12px 10px;
    font-size: 1rem;
  }

  .nav-toggle { display: inline-flex; }

  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-copy { margin-left: 0; }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 600px) {
  .version-badge { display: none; }
  .brand__line { display: none; }
  .brand__name { font-size: 1rem; }
  .footer-bottom { gap: 8px 16px; }
  .vault-row { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .vault-row__k { padding-top: 0; }
}

@media (max-width: 420px) {
  .btn--sm { padding: 7px 10px; font-size: .75rem; }
  .nav-toggle__label { display: none; }
  .nav-toggle { padding: 8px 10px; }
}

/* =========================================================
   动效降级
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .scroll-progress__bar { transition: none; }
  .vault-panel { animation: none; }
}