/* ==========================================================================
   牛牛赌钱局 · 共享样式表 /assets/site.css
   高原夜色情报站：藏红 + 鎏金 + 深靛蓝，锐利直角、细线网格、编号叙事
   ========================================================================== */

/* ---------- 0. 设计令牌 ---------- */
:root {
  --ink: #130F14;
  --ink-soft: #1A141B;
  --saffron: #9E2B25;
  --saffron-deep: #6B1714;
  --gold: #D7A84B;
  --gold-bright: #F0C96A;
  --indigo: #1B2A4A;
  --butter: #E6B85C;
  --cream: #F6E8CF;
  --line: #3C2F3F;

  --text: rgba(246, 232, 207, 0.86);
  --text-dim: rgba(246, 232, 207, 0.58);
  --hair: rgba(215, 168, 75, 0.34);
  --hair-soft: rgba(60, 47, 63, 0.92);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --max-width: 1280px;
  --gutter: clamp(16px, 4vw, 48px);
  --header-h: 72px;
  --grid-gap: clamp(16px, 2vw, 32px);
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

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

ol, ul { list-style: none; }

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

button { font: inherit; color: inherit; }

a { color: inherit; }

/* ---------- 2. 基础排版 ---------- */
body {
  position: relative;
  background-color: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 全站精密网格底纹（12 列竖线，极低透明度） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: linear-gradient(90deg, rgba(60, 47, 63, 0.55) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 70%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 70%);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--cream);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

p { max-width: 68ch; }

::selection {
  background: var(--gold);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
}

/* ---------- 3. 通用排版与布局组件 ---------- */
.container {
  width: min(100% - (var(--gutter) * 2), var(--max-width));
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - (var(--gutter) * 2), 820px);
  margin-inline: auto;
}

.site-main { display: block; }

.page-top { padding-top: calc(var(--header-h) + clamp(28px, 5vw, 64px)); }

.section { padding-block: clamp(48px, 7vw, 96px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 3vw, 40px);
  border-bottom: 1px solid var(--line);
}

.display {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 1.5rem + 3.6vw, 4rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.lede {
  font-size: clamp(1rem, 0.95rem + 0.35vw, 1.15rem);
  line-height: 1.85;
  color: var(--text);
  max-width: 54ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(24px, 4vw, 48px);
}

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

.axis-col { grid-column: span 2; }
.main-col { grid-column: span 10; }

/* 章节编号色带 */
.chapter-band {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-block: 12px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.chapter-band__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.chapter-band__title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cream);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--hair);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  white-space: nowrap;
}

.tag--solid {
  background: var(--saffron);
  border-color: var(--saffron);
  color: var(--cream);
}

.tag--butter {
  border-color: rgba(230, 184, 92, 0.5);
  color: var(--butter);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  background: none;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: #1C1206;
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background: var(--gold-bright);
  border-color: var(--gold-bright);
}

.btn--outline {
  border-color: var(--hair);
  color: var(--gold);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
  color: #1C1206;
}

.btn--ghost {
  border-color: rgba(246, 232, 207, 0.28);
  color: var(--cream);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--gold);
  color: var(--gold-bright);
}

.btn--sm {
  padding: 8px 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* 复制按钮 */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--hair);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.copy-btn:hover,
.copy-btn:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
  color: #1C1206;
}

.copy-status {
  display: block;
  min-height: 1.6em;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--butter);
}

/* 面包屑 */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: clamp(20px, 3vw, 36px);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__link {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.breadcrumb__sep {
  color: var(--line);
}

/* 媒体容器基础规则 */
.media-figure { margin: 0; }

.media-figure__caption {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  background-color: var(--ink-soft);
  background-image:
    radial-gradient(120% 120% at 18% 0%, rgba(158, 43, 37, 0.55), transparent 62%),
    linear-gradient(158deg, var(--indigo) 0%, var(--ink) 78%);
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: var(--gutter);
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold-bright);
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: top 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 12px;
}

/* ---------- 5. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.site-header[data-scrolled="true"] {
  --header-h: 62px;
  background-image: linear-gradient(180deg, #A22D26 0%, #8C2420 100%);
  border-bottom-color: var(--hair);
  box-shadow: 0 18px 34px -26px #000;
}

.site-header[data-open="true"] {
  background-color: var(--saffron-deep);
  background-image: none;
  border-bottom-color: var(--hair);
}

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(60, 47, 63, 0.6);
}

.header-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(90deg, var(--saffron) 0%, var(--gold) 55%, var(--gold-bright) 100%);
  transform: scaleX(0);
  transform-origin: left center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 32px);
  min-height: var(--header-h);
  transition: min-height 0.25s var(--ease);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  text-decoration: none;
  color: var(--cream);
}

.brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  background-image: linear-gradient(150deg, var(--saffron) 0%, var(--saffron-deep) 100%);
  border: 1px solid rgba(215, 168, 75, 0.55);
  color: var(--gold-bright);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
}

.brand__mark::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 6px;
  height: 6px;
  background: var(--gold);
}

.brand__mark-glyph { transform: translateY(-1px); }

.brand__text {
  display: grid;
  gap: 3px;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.1em;
  color: var(--cream);
  transition: color 0.2s var(--ease);
}

.brand:hover .brand__name,
.brand:focus-visible .brand__name { color: var(--gold-bright); }

.brand__line {
  font-size: 10px;
  line-height: 1.2;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

/* 头部辅助说明 */
.header-utility {
  max-width: none;
  margin: 0;
  padding-left: 18px;
  border-left: 1px solid var(--hair);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.6;
  color: var(--text-dim);
  white-space: nowrap;
}

/* 导航 */
.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.8vw, 28px);
  margin-left: auto;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 22px);
}

.nav__item { display: flex; }

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding-block: 10px;
  color: var(--cream);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.nav__link[aria-current="page"] {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.nav__no {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--gold);
  opacity: 0.85;
  transition: color 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav__link:hover .nav__no,
.nav__link:focus-visible .nav__no,
.nav__link[aria-current="page"] .nav__no {
  color: var(--gold-bright);
  opacity: 1;
}

.nav__label { display: inline-block; }

.nav__cta { flex: none; margin-left: 6px; }

/* 移动端目录按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 13px;
  background: transparent;
  border: 1px solid rgba(246, 232, 207, 0.3);
  border-radius: 0;
  color: var(--cream);
  font-size: 13px;
  letter-spacing: 0.12em;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--gold);
  color: var(--gold-bright);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.nav-toggle__label { display: inline-block; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 128px);
  padding-top: 5px;
  background-color: var(--ink);
  border-top: 1px solid var(--line);
  color: var(--text);
  overflow: hidden;
}

/* 经幡色带 */
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--saffron) 0 30px,
    var(--gold) 30px 46px,
    var(--indigo) 46px 82px,
    var(--butter) 82px 90px,
    var(--saffron-deep) 90px 132px
  );
}

.footer__pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(215, 168, 75, 0.1) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(215, 168, 75, 0.07) 0 1px, transparent 1px 96px);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 72%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 72%);
}

.footer__inner {
  position: relative;
  padding-top: clamp(40px, 6vw, 72px);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.15fr;
  gap: clamp(24px, 3vw, 52px);
}

.footer__brand { min-width: 0; }

.footer__mark {
  font-family: var(--font-display);
  font-size: clamp(26px, 2rem + 1.4vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--cream);
  max-width: none;
}

.footer__line {
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  max-width: none;
}

.footer__intro {
  margin-top: 18px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.footer__brand .btn { margin-top: 22px; }

.footer__col { min-width: 0; }

.footer__title {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer__list {
  display: grid;
  gap: 10px;
}

.footer__list a {
  display: inline-block;
  font-size: 14px;
  color: rgba(246, 232, 207, 0.78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer__list a:hover,
.footer__list a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.footer__list--contact { gap: 12px; }

.footer__list--contact li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 10px;
  align-items: baseline;
}

.footer__key {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.footer__val {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
  overflow-wrap: anywhere;
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  margin-top: clamp(32px, 5vw, 56px);
  padding-block: 18px 28px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--text-dim);
}

.footer__legal-item {
  max-width: none;
  margin: 0;
  letter-spacing: 0.08em;
}

.footer__legal-item--links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer__legal-link {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer__legal-link:hover,
.footer__legal-link:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 7. 响应式 ---------- */
@media (max-width: 1199px) {
  .header-utility { display: none; }
}

@media (max-width: 1024px) {
  html[data-nav-open="true"] { overflow: hidden; }

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

  .nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    z-index: 90;
    flex-direction: column;
    align-items: stretch;
    gap: 22px;
    margin-left: 0;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    padding: 18px var(--gutter) 40px;
    background-color: var(--saffron-deep);
    background-image: linear-gradient(180deg, rgba(19, 15, 20, 0.55), rgba(19, 15, 20, 0.9));
    border-top: 1px solid var(--hair);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s var(--ease);
  }

  .site-header[data-open="true"] .nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__item {
    border-bottom: 1px solid rgba(215, 168, 75, 0.22);
  }

  .nav__link {
    display: flex;
    align-items: baseline;
    gap: 14px;
    width: 100%;
    padding-block: 16px;
    font-size: 17px;
    border-bottom: 0;
  }

  .nav__no { font-size: 11px; }

  .nav__cta {
    margin-left: 0;
    align-self: flex-start;
    padding: 12px 22px;
    font-size: 14px;
  }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .axis-col { grid-column: span 6; }
  .main-col { grid-column: span 6; }

  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  :root { --header-h: 64px; }

  .brand__mark { width: 36px; height: 36px; font-size: 15px; }
  .brand__name { font-size: 15px; letter-spacing: 0.08em; }
  .brand__line { font-size: 9px; letter-spacing: 0.14em; }

  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .axis-col,
  .main-col { grid-column: auto; }

  .footer__grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .footer__intro { max-width: none; }
  .footer__legal { justify-content: flex-start; }
  .footer__list--contact li { grid-template-columns: 46px 1fr; }

  .section__head { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .btn { padding: 11px 16px; font-size: 13px; }
  .nav-toggle { padding: 8px 10px; }
}

/* ---------- 8. 无障碍与动效偏好 ---------- */
@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;
    scroll-behavior: auto !important;
  }
}