/* ============================================================
   金沙平台官网 · 共享样式 /assets/site.css
   档案抽屉框架：顶部条 + 左侧竖轨构成画框
   ============================================================ */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption,
dl, dt, dd, blockquote { margin: 0; }

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

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

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

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

[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #0F1B2A;
  --ink-2: #14263A;
  --ink-3: #0B1420;
  --paper-line: #29384E;

  --gold: #C9A227;
  --gold-soft: #E3C462;
  --sandbrown: #8A5A2B;
  --jade: #2E8B7A;
  --jade-light: #4FB3A2;
  --clay: #C0492F;
  --clay-light: #E4836C;

  --sand: #F3EDE1;
  --stone: #D8CFBE;
  --umber: #6E5A3A;
  --muted: #96A6B8;

  --frame: 20px;
  --rail-w: 52px;
  --maxw: 1320px;

  --shadow-hard: 6px 6px 0 rgba(201, 162, 39, 0.32);
  --shadow-hard-hi: 8px 8px 0 var(--gold);

  --font-title: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  padding: 0 var(--frame);
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(1200px 620px at 78% -8%, rgba(201, 162, 39, 0.09), transparent 62%),
    radial-gradient(900px 520px at 6% 104%, rgba(46, 139, 122, 0.07), transparent 60%);
  background-repeat: no-repeat;
  color: var(--sand);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 0.02em;
  text-wrap: balance;
}

h1 { font-size: 40px; }
h2 { font-size: 25px; }
h3 { font-size: 16px; }
h4 { font-size: 16px; letter-spacing: 0.08em; }

p { max-width: 76ch; }

code, kbd, samp, .mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

:focus-visible {
  outline: 2px solid var(--jade-light);
  outline-offset: 2px;
  border-radius: 1px;
}

/* ---------- 4. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

@media (max-width: 1100px) {
  .grid-12 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .grid-12 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
}

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: fixed;
  top: -96px;
  left: 20px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--gold);
  color: var(--ink-3);
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: top 0.16s ease-out;
}
.skip-link:focus { top: 12px; }

/* ---------- 6. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
}

.site-header__bar {
  position: relative;
  background: var(--ink-3);
  border-bottom: 2px solid var(--gold);
}

.site-header__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 14px 0;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: padding 0.18s ease-out;
}

.site-header[data-condensed] .site-header__inner {
  padding-top: 8px;
  padding-bottom: 8px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
}
.brand__mark {
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
}
.brand__line {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand:hover .brand__mark { color: var(--sand); }

.coord {
  flex: none;
  padding: 3px 9px;
  border: 1px solid var(--sandbrown);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.site-header__tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  padding: 7px 15px;
  border: 2px solid var(--sandbrown);
  background: transparent;
  color: var(--sand);
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: transform 0.12s ease-out, background 0.12s ease-out,
              color 0.12s ease-out, border-color 0.12s ease-out;
}
.icon-btn:hover {
  transform: translateY(-2px);
  background: var(--sandbrown);
  border-color: var(--gold);
  color: var(--sand);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 15px;
  border: 2px solid var(--gold);
  color: var(--gold-soft);
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: transform 0.12s ease-out, background 0.12s ease-out, color 0.12s ease-out;
}
.nav-toggle:hover { transform: translateY(-2px); background: rgba(201, 162, 39, 0.14); }

.nav-toggle__bars {
  position: relative;
  width: 18px;
  height: 12px;
  flex: none;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  transition: transform 0.14s ease-out, top 0.14s ease-out, bottom 0.14s ease-out;
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { bottom: 5px; transform: rotate(-45deg); }

/* 站内快速索引浮层 */
.quick-index {
  position: absolute;
  right: 0;
  top: calc(100% + 2px);
  z-index: 90;
  width: min(340px, calc(100vw - var(--frame) * 2));
  padding: 18px;
  background: var(--ink-2);
  border: 2px solid var(--gold);
  box-shadow: 6px 6px 0 rgba(201, 162, 39, 0.42);
}
.quick-index__label {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
  max-width: none;
}
.quick-index__list { display: grid; gap: 2px; }
.quick-index__link {
  display: block;
  padding: 10px 10px;
  border-bottom: 1px solid var(--paper-line);
  font-size: 15px;
  color: var(--sand);
  transition: background 0.12s ease-out, color 0.12s ease-out, padding-left 0.12s ease-out;
}
.quick-index__link:hover {
  padding-left: 16px;
  background: var(--ink-3);
  color: var(--gold-soft);
}

/* ---------- 7. 主导航：桌面竖轨 / 移动抽屉 ---------- */
.site-nav {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 70;
  width: var(--rail-w);
  padding: 72px 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  overflow-y: auto;
  background: linear-gradient(180deg, #16283D 0%, var(--ink-3) 38%);
  border-right: 2px solid var(--paper-line);
}

.site-nav__coord {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--sandbrown);
  max-width: none;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.site-nav__item { display: block; }

.site-nav__link {
  display: block;
  padding: 11px 8px;
  writing-mode: vertical-rl;
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--stone);
  border-left: 3px solid transparent;
  transition: color 0.12s ease-out, background 0.12s ease-out, border-color 0.12s ease-out;
}
.site-nav__link:hover { color: var(--gold-soft); background: rgba(201, 162, 39, 0.1); }
.site-nav__link[aria-current="page"] {
  background: var(--gold-soft);
  color: var(--ink-3);
  border-left-color: var(--gold);
}

@media (min-width: 1101px) {
  body { padding-left: calc(var(--frame) + var(--rail-w)); }
}

@media (max-width: 1100px) {
  .site-nav {
    inset: 0 0 0 auto;
    width: min(86vw, 340px);
    padding: 28px 24px;
    align-items: stretch;
    gap: 18px;
    background: var(--ink-2);
    border-right: 0;
    border-left: 2px solid var(--gold);
    box-shadow: -6px 0 0 rgba(201, 162, 39, 0.22);
    transform: translateX(101%);
    visibility: hidden;
    transition: transform 0.2s ease-out, visibility 0s linear 0.2s;
  }
  .site-nav[data-open] {
    transform: none;
    visibility: visible;
    transition: transform 0.2s ease-out;
  }
  .site-nav__coord {
    writing-mode: horizontal-tb;
    letter-spacing: 0.24em;
    color: var(--gold);
  }
  .site-nav__list { align-items: stretch; gap: 4px; }
  .site-nav__link {
    writing-mode: horizontal-tb;
    padding: 15px 12px;
    font-size: 16px;
    letter-spacing: 0.12em;
    border-left: 4px solid transparent;
  }
  .site-nav__link[aria-current="page"] { border-left-color: var(--gold); }
  .nav-toggle { display: inline-flex; }
}

/* ---------- 8. Footer ---------- */
.site-footer {
  margin-top: 96px;
  border-top: 2px solid var(--gold);
  background: var(--ink-3);
}

.site-footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 48px 0 34px;
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1.5fr;
  gap: 32px;
}

.site-footer__mark {
  display: block;
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
}
.site-footer__tagline {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--stone);
  max-width: none;
}
.site-footer__legal {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sandbrown);
  max-width: none;
}
.site-footer__note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 42ch;
}

.site-footer__title {
  margin-bottom: 14px;
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.site-footer__list {
  display: grid;
  gap: 9px;
  font-size: 14px;
}
.site-footer__list a {
  color: var(--stone);
  border-bottom: 1px solid transparent;
  transition: color 0.12s ease-out, border-color 0.12s ease-out;
}
.site-footer__list a:hover {
  color: var(--jade-light);
  border-bottom-color: var(--jade-light);
}

.site-footer__contact { display: grid; gap: 3px; }
.site-footer__label {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.site-footer__label:first-child { margin-top: 0; }
.site-footer__value {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--sand);
  max-width: 30ch;
}

.site-footer__base {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 16px 0 30px;
  border-top: 1px solid var(--paper-line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  justify-content: space-between;
}
.site-footer__base-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  max-width: none;
}

@media (max-width: 1100px) {
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .site-footer__col--contact { grid-column: span 2; }
}
@media (max-width: 700px) {
  .site-footer { margin-top: 64px; }
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 34px;
  }
  .site-footer__col--contact { grid-column: auto; }
  .site-footer__base { padding-bottom: 24px; }
}

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 2px solid var(--gold);
  background: transparent;
  color: var(--gold-soft);
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-hard);
  transition: transform 0.12s ease-out, box-shadow 0.12s ease-out,
              background 0.12s ease-out, color 0.12s ease-out, border-color 0.12s ease-out;
}
.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hard-hi);
}
.btn--gold {
  background: var(--gold);
  border-color: var(--gold-soft);
  color: var(--ink-3);
}
.btn--gold:hover { background: var(--gold-soft); }
.btn--jade {
  border-color: var(--jade-light);
  color: var(--jade-light);
  box-shadow: 6px 6px 0 rgba(79, 179, 162, 0.26);
}
.btn--jade:hover { box-shadow: 8px 8px 0 rgba(79, 179, 162, 0.55); }
.btn--ghost {
  border-color: var(--sandbrown);
  color: var(--sand);
  box-shadow: 6px 6px 0 rgba(138, 90, 43, 0.3);
}
.btn--ghost:hover { box-shadow: 8px 8px 0 rgba(138, 90, 43, 0.6); }

/* ---------- 10. 面包屑 ---------- */
.crumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.crumb__item { display: inline-flex; align-items: center; }
.crumb__item + .crumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--sandbrown);
}
.crumb a { color: var(--stone); transition: color 0.12s ease-out; }
.crumb a:hover { color: var(--gold-soft); }

/* ---------- 11. 区块抬头 ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--gold);
}
.section-head__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.section-head__title {
  font-family: var(--font-title);
  font-size: 25px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--sand);
}
.section-head__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

/* ---------- 12. 档案卡 ---------- */
.panel {
  padding: 22px;
  background: var(--ink-2);
  border: 2px solid var(--sandbrown);
  box-shadow: 6px 6px 0 rgba(201, 162, 39, 0.22);
  transition: transform 0.12s ease-out, box-shadow 0.12s ease-out, border-color 0.12s ease-out;
}
.panel:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: var(--shadow-hard-hi);
}

/* ---------- 13. 键值对照条 ---------- */
.ledger { border-top: 2px solid var(--paper-line); }
.ledger__row {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 18px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--paper-line);
}
.ledger__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.ledger__val { font-size: 15px; color: var(--sand); }

@media (max-width: 700px) {
  .ledger__row { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- 14. 状态标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--sandbrown);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
  white-space: nowrap;
}
.tag--gold {
  border-color: var(--gold);
  background: rgba(201, 162, 39, 0.14);
  color: var(--gold-soft);
}
.tag--jade {
  border-color: var(--jade-light);
  background: rgba(46, 139, 122, 0.16);
  color: var(--jade-light);
}
.tag--clay {
  border-color: var(--clay);
  background: rgba(192, 73, 47, 0.16);
  color: var(--clay-light);
}

/* ---------- 15. 折叠展开 ---------- */
.drawer { border-top: 2px solid var(--paper-line); }
.drawer__head {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--paper-line);
  text-align: left;
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--sand);
  transition: color 0.12s ease-out;
}
.drawer__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--gold);
}
.drawer__head[aria-expanded="true"] { color: var(--gold-soft); }
.drawer__head[aria-expanded="true"]::after { content: "−"; }
.drawer__head:hover { color: var(--gold-soft); }
.drawer__panel {
  padding: 14px 0 20px;
  border-bottom: 1px solid var(--paper-line);
  font-size: 15px;
  color: var(--stone);
}
.drawer__panel > * + * { margin-top: 0.9em; }

/* ---------- 16. 图片容器基础规则 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--sandbrown);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(120deg, rgba(201, 162, 39, 0.16), rgba(138, 90, 43, 0.08) 46%, rgba(46, 139, 122, 0.10));
}
.media__inner {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(201, 162, 39, 0.13) 0 2px,
    transparent 2px 9px
  );
}
.media--portrait .media__inner { aspect-ratio: 3 / 4; }
.media--square .media__inner { aspect-ratio: 1 / 1; }
.media--wide .media__inner { aspect-ratio: 21 / 9; }
.media__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--paper-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 17. 数据块 ---------- */
.stat__value {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--gold-soft);
}
.stat__label {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

/* ---------- 18. 正文窄栏 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--sand);
}
.prose > * + * { margin-top: 1.2em; }
.prose h2 {
  margin-top: 2em;
  font-size: 25px;
  font-weight: 900;
}
.prose h3 {
  margin-top: 1.6em;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
}
.prose ul { display: grid; gap: 8px; }
.prose ol { display: grid; gap: 8px; counter-reset: prose-ol; }
.prose li { position: relative; padding-left: 22px; }
.prose ul li::before {
  content: "▚";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 12px;
  color: var(--gold);
}
.prose ol li { counter-increment: prose-ol; padding-left: 30px; }
.prose ol li::before {
  content: counter(prose-ol, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}
.prose a {
  color: var(--jade-light);
  border-bottom: 1px solid currentColor;
}
.prose a:hover { color: var(--gold-soft); border-bottom-color: var(--gold-soft); }
.prose code {
  padding: 2px 6px;
  background: var(--ink-2);
  border: 1px solid var(--paper-line);
  font-size: 14px;
  color: var(--gold-soft);
}

/* ---------- 19. 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.24s ease-out, transform 0.24s ease-out;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 20. 响应式微调 ---------- */
@media (max-width: 900px) {
  .brand__line { display: none; }
  .coord { display: none; }
}

@media (max-width: 700px) {
  :root { --frame: 14px; }

  body { font-size: 16px; }
  h1 { font-size: 30px; }
  h2 { font-size: 22px; }
  .section-head__title { font-size: 21px; }
  .section-head__note { margin-left: 0; width: 100%; }
  .stat__value { font-size: 32px; }
  .quick-index { right: -2px; }
}

/* ---------- 21. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .btn:hover,
  .btn:focus-visible,
  .panel:hover,
  .icon-btn:hover,
  .nav-toggle:hover {
    transform: none !important;
  }
}