/* ==========================================================================
   百家乐主站 · 共享样式 /assets/site.css
   堆叠画板 · 居中刊头 · 朱砂鎏金近单色体系
   ========================================================================== */

/* ---------- 变量 ---------- */
:root {
  --red: #A8322A;
  --red-light: #D98A7E;
  --red-deep: #6E1F19;
  --gold: #C9A227;
  --green-deep: #1F3A32;
  --green-mid: #4E6B60;
  --blue: #2B4C8C;
  --paper: #F6F1E7;
  --canvas: #FFFDF8;
  --sand: #EDE4D3;
  --ink: #4A4A45;

  --fs-1: clamp(2rem, 5.5vw, 3rem);
  --fs-2: clamp(1.6rem, 3.6vw, 2.125rem);
  --fs-3: 1.5rem;
  --fs-4: 1.1875rem;
  --fs-5: 1rem;
  --fs-6: 0.8125rem;

  --radius-panel: 32px;
  --radius-block: 16px;
  --radius-pill: 999px;

  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container: 1200px;
  --gutter: 1.25rem;
}

@media (min-width: 768px) { :root { --gutter: 2rem; } }
@media (min-width: 1200px) { :root { --gutter: 2.5rem; } }

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--green-deep);
}

h1 { font-size: var(--fs-1); font-weight: 900; }
h2 { font-size: var(--fs-2); font-weight: 900; }
h3 { font-size: var(--fs-3); }
h4 { font-size: var(--fs-4); }

p { margin: 0 0 1.2em; }
ul, ol { margin: 0 0 1.2em; padding-inline-start: 1.3em; }
a { color: inherit; }
button { font: inherit; }

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

/* ---------- 排版工具 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.annotation {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.16em;
  line-height: 1.4;
  color: var(--green-mid);
  writing-mode: vertical-rl;
}

.prose { max-width: 68ch; }
.prose a,
.link {
  color: var(--green-deep);
  text-decoration: underline;
  text-decoration-color: var(--green-mid);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
  transition: color 140ms ease, text-decoration-color 140ms ease;
}
.prose a:hover,
.link:hover {
  color: var(--red);
  text-decoration-color: var(--red);
  text-decoration-thickness: 2px;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.stack { display: grid; gap: 1rem; }
.stack--lg { gap: 2rem; }

.grid { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); }

@media (min-width: 880px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
  .grid--4-8 { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }
  .grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
}

/* ---------- 画板 ---------- */
.panel {
  background: var(--canvas);
  border-radius: var(--radius-panel);
  padding: clamp(1.5rem, 4vw, 3rem);
}
.panel--sand { background: var(--sand); }
.panel--deep { background: var(--green-deep); color: rgba(246, 241, 231, 0.88); }
.panel--deep h1,
.panel--deep h2,
.panel--deep h3,
.panel--deep h4 { color: var(--canvas); }

/* ---------- 章节刊头 ---------- */
.section-head { display: grid; gap: 0.55rem; margin-bottom: 1.75rem; }
.section-head__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
}
.section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-2);
  font-weight: 900;
  line-height: 1.3;
  color: var(--green-deep);
}
.section-head__note {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--green-mid);
}

/* ---------- 分隔线 ---------- */
.rule {
  height: 1px;
  border: 0;
  margin: 2rem 0;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0));
}
.rule--center {
  background: linear-gradient(90deg, rgba(201, 162, 39, 0), var(--gold), rgba(201, 162, 39, 0));
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn--primary { background: var(--red); color: #fff; }
.btn--primary:hover { background: var(--red-deep); color: #fff; }
.btn--ghost { background: transparent; color: var(--green-deep); border-color: var(--green-deep); }
.btn--ghost:hover { background: var(--green-deep); color: var(--canvas); }
.btn--gold { background: var(--gold); color: var(--green-deep); }
.btn--gold:hover { background: #B08E1D; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--sand);
  border-radius: var(--radius-pill);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.03em;
  color: var(--green-mid);
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}
.tag::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--red-light);
  transition: background-color 150ms ease;
}
.tag:hover {
  background: var(--sand);
  border-color: var(--gold);
  color: var(--green-deep);
}
.tag:hover::before { background: var(--red); }

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-block);
  background: var(--sand);
  aspect-ratio: 4 / 3;
}
.media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--seal { background: linear-gradient(135deg, var(--sand), #E2D6C0); }
.media-frame__caption {
  display: block;
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.04em;
  color: var(--green-mid);
}

/* ---------- 数据表 ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.7;
}
.data-table th,
.data-table td {
  padding: 0.7rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--sand);
  vertical-align: top;
}
.data-table thead th {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.08em;
  color: var(--green-deep);
  background: var(--paper);
  white-space: nowrap;
}
.data-table tbody tr:nth-child(even) { background: rgba(237, 228, 211, 0.42); }
.data-table__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}
.data-table__caption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  color: var(--green-mid);
}

/* ---------- 数据概览 ---------- */
.stat { display: grid; gap: 0.15rem; }
.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-2);
  font-weight: 600;
  line-height: 1.1;
  color: var(--red);
}
.stat__label {
  font-size: var(--fs-6);
  letter-spacing: 0.12em;
  color: var(--green-mid);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.06em;
  color: var(--green-mid);
}
.breadcrumb a {
  color: var(--green-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 140ms ease, border-color 140ms ease;
}
.breadcrumb a:hover { color: var(--red); border-bottom-color: var(--red); }
.breadcrumb__sep { color: var(--red-light); }

/* ==========================================================================
   跳转链接
   ========================================================================== */
.skip-link {
  position: fixed;
  top: -6rem;
  left: 1rem;
  z-index: 999;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-pill);
  background: var(--red);
  color: #fff;
  font-size: var(--fs-6);
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: top 160ms ease;
}
.skip-link:focus { top: 0.85rem; }

/* ==========================================================================
   页头
   ========================================================================== */
.site-header {
  position: relative;
  background: var(--paper);
}

/* 报头 */
.masthead { padding: 2.25rem 0 1.75rem; }

.masthead__inner {
  position: relative;
  display: grid;
  place-items: center;
  text-align: center;
}

.masthead__center {
  display: grid;
  justify-items: center;
  gap: 0.35rem;
}

.masthead__seal {
  display: block;
  width: 34px;
  height: 34px;
  color: var(--red);
}
.masthead__seal svg { display: block; width: 100%; height: 100%; }

.masthead__line {
  margin: 0.35rem 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.22em;
  color: var(--green-mid);
  text-transform: uppercase;
}

.masthead__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-1);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--green-deep);
}

.masthead__link {
  color: inherit;
  text-decoration: none;
  transition: color 150ms ease;
}
.masthead__link:hover { color: var(--red); }

.masthead__sub {
  margin: 0.55rem 0 0;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(201, 162, 39, 0.55);
  font-size: var(--fs-6);
  letter-spacing: 0.1em;
  color: var(--green-mid);
}

.masthead__aside {
  display: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--red-light);
}
.masthead__aside--start { left: 0; }
.masthead__aside--end { right: 0; }

@media (min-width: 1000px) {
  .masthead__aside { display: block; }
}

/* 栏目索引条 */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--canvas);
  border-top: 1px solid rgba(201, 162, 39, 0.55);
  border-bottom: 1px solid var(--sand);
  box-shadow: 0 8px 20px -18px rgba(31, 58, 50, 0.75);
}

.nav-bar__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  column-gap: 1rem;
  row-gap: 0.5rem;
  padding-block: 0.55rem;
}

/* 移动端按钮 */
.nav-toggle {
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.9rem 0.4rem 0.75rem;
  border: 1px solid var(--sand);
  border-radius: var(--radius-pill);
  background: var(--paper);
  color: var(--green-deep);
  font-size: var(--fs-6);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}
.nav-toggle:hover { background: var(--sand); border-color: var(--gold); }
.nav-toggle[aria-expanded="true"] {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

.nav-toggle__bars { display: grid; gap: 4px; width: 15px; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

/* 导航 */
.site-nav {
  grid-column: 1 / -1;
  grid-row: 2;
  display: none;
  padding-top: 0.4rem;
  border-top: 1px solid var(--sand);
}
.site-nav[data-open] { display: block; }

.site-nav__list {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item { margin: 0; }

.site-nav__link {
  display: block;
  padding: 0.5rem 0.85rem;
  border-inline-start: 2px solid transparent;
  font-size: var(--fs-5);
  color: var(--green-deep);
  text-decoration: none;
  transition: color 140ms ease, background-color 140ms ease, border-color 140ms ease;
}
.site-nav__link:hover {
  color: var(--red);
  background: rgba(217, 138, 126, 0.14);
}
.site-nav__link[aria-current="page"] {
  color: var(--red);
  border-inline-start-color: var(--red);
  font-weight: 600;
}

/* 工具索引 */
.utility__list {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  max-width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.utility__list::-webkit-scrollbar { display: none; }
.utility__item { margin: 0; }

.utility__link {
  display: block;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--sand);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.04em;
  color: var(--green-mid);
  text-decoration: none;
  white-space: nowrap;
  transition: color 140ms ease, border-color 140ms ease, background-color 140ms ease;
}
.utility__link:hover {
  color: var(--blue);
  border-color: var(--blue);
  background: rgba(43, 76, 140, 0.08);
}

/* 桌面端导航横排 */
@media (min-width: 900px) {
  .nav-bar__inner { grid-template-columns: 1fr auto 1fr; }

  .nav-toggle { display: none; }

  .site-nav,
  .site-nav[data-open] {
    display: block;
    grid-column: 2;
    grid-row: 1;
    padding-top: 0;
    border-top: 0;
  }

  .site-nav__list {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0.15rem;
  }

  .site-nav__link {
    padding: 0.5rem 0.9rem;
    border-inline-start-color: transparent;
    border-bottom: 2px solid transparent;
  }
  .site-nav__link[aria-current="page"] {
    border-inline-start-color: transparent;
    border-bottom-color: var(--red);
  }
}

/* 阅读进度线 */
.read-progress {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 60;
  height: 3px;
  background: rgba(31, 58, 50, 0.1);
  pointer-events: none;
}
.read-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--red), var(--gold));
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-top: 4rem;
  background: var(--red-deep);
  color: var(--paper);
}

.footer__inner {
  display: grid;
  gap: 2.5rem;
  padding-block: 3.25rem 1.75rem;
}

.footer__top { display: grid; gap: 2.5rem; }

@media (min-width: 900px) {
  .footer__top {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 3rem;
  }
}

.footer__brand {
  display: grid;
  gap: 0.4rem;
  align-content: start;
}

.footer__seal {
  display: block;
  width: 32px;
  height: 32px;
  margin-bottom: 0.35rem;
  color: var(--gold);
}
.footer__seal svg { display: block; width: 100%; height: 100%; }

.footer__brand-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-3);
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--canvas);
}

.footer__brand-line {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.18em;
  color: var(--gold);
}

.footer__brand-note {
  margin: 0.5rem 0 0;
  max-width: 30ch;
  font-size: var(--fs-6);
  line-height: 1.85;
  color: rgba(246, 241, 231, 0.68);
}

.footer__cols { display: grid; gap: 1.75rem; }

@media (min-width: 600px) {
  .footer__cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.footer__col { min-width: 0; }

.footer__col-title {
  margin: 0 0 0.85rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid rgba(201, 162, 39, 0.35);
  font-size: var(--fs-6);
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.footer__list {
  display: grid;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer__link {
  display: inline-block;
  padding-block: 0.18rem;
  border-bottom: 1px solid transparent;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(246, 241, 231, 0.84);
  text-decoration: none;
  transition: color 140ms ease, border-color 140ms ease;
}
.footer__link:hover {
  color: var(--canvas);
  border-bottom-color: var(--gold);
}

.footer__contact {
  display: grid;
  gap: 0.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(201, 162, 39, 0.3);
}

.footer__contact-line {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  line-height: 2;
  letter-spacing: 0.03em;
  color: rgba(246, 241, 231, 0.92);
}

.footer__contact-note {
  margin: 0;
  font-size: var(--fs-6);
  line-height: 1.85;
  color: rgba(246, 241, 231, 0.6);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(246, 241, 231, 0.16);
}

.footer__legal-line,
.footer__legal-links {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.04em;
  color: rgba(246, 241, 231, 0.58);
}

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer__legal-links .footer__link { font-size: var(--fs-6); }

/* ==========================================================================
   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;
  }
}