/* ============================================================
   财神棋牌888 · /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 01 · 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

hr {
  border: 0;
  border-top: 1px solid var(--line);
}

/* ---------- 02 · 变量 ---------- */
:root {
  /* 色板 */
  --gold-600: #C08A1E;
  --gold-300: #E7C873;
  --gold-900: #6E4E10;
  --crimson-700: #7E1418;
  --crimson-500: #B3251F;
  --ink-900: #14100E;
  --umber-700: #3A2A21;
  --cream-50: #FBF7EF;
  --parchment-100: #F1E7D4;
  --slate-500: #6B6259;
  --teal-600: #14524E;

  /* 语义 */
  --bg: var(--cream-50);
  --fg: var(--ink-900);
  --line: rgba(58, 42, 33, 0.16);
  --line-strong: rgba(58, 42, 33, 0.36);
  --line-gold: rgba(192, 138, 30, 0.42);
  --line-cream: rgba(231, 200, 115, 0.28);

  /* 尺寸 */
  --shell: 1320px;
  --gut: 48px;
  --header-h: 78px;

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

  /* 动效 */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur: 320ms;
}

/* ---------- 03 · 基础排版 ---------- */
body {
  min-height: 100vh;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  background-color: var(--bg);
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(58, 42, 33, 0.042) 0 1px,
    transparent 1px 96px
  );
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--ink-900);
}

p {
  max-width: 34em;
}

strong {
  font-weight: 900;
  color: var(--ink-900);
}

::selection {
  color: var(--ink-900);
  background: var(--gold-300);
}

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--gold-600);
  outline-offset: 2px;
}

/* ---------- 04 · 容器与栅格 ---------- */
.shell {
  width: 100%;
  max-width: calc(var(--shell) + var(--gut) * 2);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.grid {
  display: grid;
  gap: 24px;
}

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

/* ---------- 05 · 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: -64px;
  left: 12px;
  z-index: 120;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold-300);
  background: var(--ink-900);
  border: 1px solid var(--gold-600);
  transition: top 200ms var(--ease);
}

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

#main-content {
  scroll-margin-top: 110px;
}

/* ---------- 06 · 头部 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 80;
  color: var(--cream-50);
  background: var(--crimson-700);
  border-bottom: 1px solid var(--line-cream);
}

.masthead::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--gold-300) 0%,
    var(--gold-600) 44%,
    rgba(192, 138, 30, 0) 92%
  );
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  display: block;
  height: 2px;
  background: var(--gold-300);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  width: 100%;
  max-width: calc(var(--shell) + var(--gut) * 2);
  min-height: var(--header-h);
  margin-inline: auto;
  padding: 12px var(--gut);
}

.masthead__primary {
  display: flex;
  align-items: center;
  gap: 26px;
  min-width: 0;
}

.masthead__index {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 品牌印记 */
.brandmark {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
}

.brandmark__ring {
  position: relative;
  flex: none;
  width: 34px;
  height: 34px;
  border: 1px solid var(--gold-300);
}

.brandmark__ring::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid var(--gold-600);
}

.brandmark__ring::after {
  content: "";
  position: absolute;
  inset: 13px;
  background: var(--gold-300);
}

.brandmark__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  white-space: nowrap;
}

.brandmark__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--cream-50);
}

.brandmark__sub {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-300);
}

.brandmark:hover .brandmark__name {
  color: var(--gold-300);
}

/* 左端辅助信息 */
.rail-panel {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-left: 26px;
  border-left: 1px solid var(--line-cream);
}

.utility-line {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(251, 247, 239, 0.74);
  white-space: nowrap;
}

.hint-line {
  display: none;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(251, 247, 239, 0.82);
}

.rail-cta {
  display: none;
}

/* 栏目导航 */
.sitenav {
  display: flex;
}

.sitenav__list {
  display: flex;
  align-items: center;
}

.sitenav__item {
  display: flex;
}

.sitenav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 12px;
  font-size: 15px;
  letter-spacing: 0.01em;
  color: var(--cream-50);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.sitenav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--gold-300);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur) var(--ease);
}

.sitenav__link:hover {
  color: var(--gold-300);
  background: rgba(231, 200, 115, 0.08);
}

.sitenav__link:hover::after {
  transform: scaleX(1);
}

.sitenav__link[aria-current="page"] {
  color: var(--gold-300);
  background: rgba(231, 200, 115, 0.12);
}

.sitenav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.sitenav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--gold-600);
  font-variant-numeric: tabular-nums;
}

/* 抽屉按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-300);
  border: 1px solid rgba(231, 200, 115, 0.5);
  transition: background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  color: var(--ink-900);
  background: var(--gold-600);
  border-color: var(--gold-600);
}

.nav-toggle__label {
  line-height: 1;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 14px;
}

.nav-toggle__bars i {
  display: block;
  height: 1px;
  background: currentColor;
}

/* ---------- 07 · 页脚 ---------- */
.colophon {
  position: relative;
  margin-top: 0;
  color: var(--cream-50);
  background: var(--crimson-700);
  border-top: 1px solid var(--gold-600);
}

.colophon::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 38%;
  height: 3px;
  background: var(--gold-300);
}

.colophon__inner {
  width: 100%;
  max-width: calc(var(--shell) + var(--gut) * 2);
  margin-inline: auto;
  padding: clamp(42px, 6vw, 72px) var(--gut) 28px;
}

.colophon__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding-bottom: 26px;
}

.colophon__mark {
  max-width: none;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--gold-300);
}

.colophon__sub {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(251, 247, 239, 0.6);
}

.colophon__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  padding-block: 32px;
  border-top: 1px solid var(--line-cream);
  border-bottom: 1px solid var(--line-cream);
}

.colophon__head {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold-300);
}

.colophon__list li {
  padding: 5px 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(251, 247, 239, 0.82);
}

.colophon__list a {
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.colophon__list a:hover {
  color: var(--gold-300);
  border-bottom-color: var(--gold-600);
}

.colophon__list--plain li {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(251, 247, 239, 0.72);
  word-break: break-word;
}

.colophon__legal {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 22px;
}

.legal-line {
  max-width: 76ch;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(251, 247, 239, 0.68);
}

.legal-line--muted {
  color: rgba(251, 247, 239, 0.48);
}

/* ---------- 08 · 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-900);
  background: transparent;
  border: 1px solid var(--gold-600);
  transition: background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.btn:hover {
  color: var(--ink-900);
  background: var(--gold-600);
}

.btn--solid {
  color: var(--cream-50);
  background: var(--crimson-500);
  border-color: var(--crimson-500);
}

.btn--solid:hover {
  color: var(--cream-50);
  background: var(--crimson-700);
  border-color: var(--crimson-700);
}

.btn--ghost {
  color: var(--ink-900);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  color: var(--cream-50);
  background: var(--ink-900);
  border-color: var(--ink-900);
}

.btn--small {
  padding: 8px 14px;
  font-size: 12px;
}

/* ---------- 09 · 面包屑 ---------- */
.crumbs {
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate-500);
}

.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}

.crumbs__item + .crumbs__item::before {
  content: "／";
  margin: 0 8px;
  color: var(--line-strong);
}

.crumbs a:hover {
  color: var(--crimson-500);
}

.crumbs__item[aria-current="page"] {
  color: var(--ink-900);
}

/* ---------- 10 · 章节与色带 ---------- */
.chapter {
  position: relative;
  padding-block: clamp(56px, 9vw, 120px);
}

.chapter__mark {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 30px;
}

.chapter__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--gold-900);
  font-variant-numeric: tabular-nums;
}

.chapter__title {
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.band {
  color: var(--cream-50);
  background: var(--crimson-700);
}

.band--ink {
  background: var(--ink-900);
}

.band--parch {
  color: var(--ink-900);
  background: var(--parchment-100);
}

.band .chapter__title {
  color: inherit;
}

.band .chapter__no {
  color: var(--gold-300);
}

.band--parch .chapter__no {
  color: var(--gold-900);
}

/* ---------- 11 · 文字工具 ---------- */
.display-metal {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--gold-600);
  background-image: linear-gradient(
    172deg,
    var(--gold-300) 0%,
    var(--gold-600) 52%,
    var(--gold-900) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.index-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate-500);
}

.data-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.prose {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-900);
}

.prose p + p {
  margin-top: 1.1em;
}

.lead {
  max-width: 34em;
  font-size: 21px;
  line-height: 1.6;
  color: var(--umber-700);
}

/* ---------- 12 · 图片容器 ---------- */
.frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--parchment-100);
  border: 1px solid var(--line);
}

.frame__media {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.frame--16x9 { aspect-ratio: 16 / 9; }
.frame--4x3  { aspect-ratio: 4 / 3; }
.frame--3x4  { aspect-ratio: 3 / 4; }
.frame--1x1  { aspect-ratio: 1 / 1; }
.frame--wide { aspect-ratio: 21 / 9; }

.frame__credit {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 12px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cream-50);
  background: linear-gradient(transparent, rgba(20, 16, 14, 0.78));
}

/* ---------- 13 · 横向滚动带 ---------- */
.ribbon {
  position: relative;
  background: var(--parchment-100);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.ribbon__track {
  display: flex;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.ribbon__item {
  flex: 0 0 auto;
  min-width: 240px;
  min-height: 180px;
  padding: 26px 22px;
  border-right: 1px solid var(--line);
  scroll-snap-align: start;
}

/* ---------- 14 · 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 15 · 响应式 ---------- */
@media (max-width: 1180px) {
  .utility-line {
    font-size: 11px;
    letter-spacing: 0.05em;
  }

  .sitenav__link {
    padding: 9px 8px;
    font-size: 14.5px;
  }
}

@media (max-width: 1040px) {
  .rail-panel {
    display: none;
  }
}

@media (max-width: 900px) {
  :root {
    --gut: 20px;
    --header-h: 64px;
  }

  .masthead__inner {
    gap: 12px;
    padding: 10px var(--gut);
  }

  .masthead__primary {
    flex: 1 1 auto;
    gap: 12px;
  }

  .brandmark {
    gap: 10px;
  }

  .brandmark__ring {
    width: 28px;
    height: 28px;
  }

  .brandmark__ring::before {
    inset: 6px;
  }

  .brandmark__ring::after {
    inset: 11px;
  }

  .brandmark__name {
    font-size: 17px;
  }

  .brandmark__sub {
    display: none;
  }

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

  /* 左抽屉 */
  .rail-panel {
    position: absolute;
    top: 100%;
    left: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    width: min(320px, 86vw);
    padding: 18px 20px 22px;
    background: var(--ink-900);
    border: 1px solid rgba(231, 200, 115, 0.32);
    border-top: 0;
    border-left: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
      visibility var(--dur) linear;
  }

  .rail-panel[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .rail-panel .utility-line {
    font-size: 12px;
    white-space: normal;
  }

  .hint-line {
    display: block;
  }

  .rail-cta {
    display: inline-flex;
  }

  .rail-panel .btn--ghost {
    color: var(--gold-300);
    border-color: rgba(231, 200, 115, 0.5);
  }

  .rail-panel .btn--ghost:hover {
    color: var(--ink-900);
    background: var(--gold-600);
    border-color: var(--gold-600);
  }

  /* 右抽屉 */
  .sitenav {
    position: absolute;
    top: 100%;
    right: 0;
    width: min(340px, 88vw);
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    padding: 6px 0 10px;
    background: var(--ink-900);
    border: 1px solid rgba(231, 200, 115, 0.32);
    border-top: 0;
    border-right: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
      visibility var(--dur) linear;
  }

  .sitenav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .sitenav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .sitenav__item {
    display: block;
  }

  .sitenav__link {
    display: flex;
    padding: 14px 20px;
    font-size: 16px;
    border-bottom: 1px solid rgba(231, 200, 115, 0.14);
  }

  .sitenav__link::after {
    top: 0;
    bottom: 0;
    left: 0;
    right: auto;
    width: 3px;
    height: auto;
    transform: scaleY(0);
    transform-origin: 50% 0;
  }

  .sitenav__link:hover::after,
  .sitenav__link[aria-current="page"]::after {
    transform: scaleY(1);
  }

  .sitenav__link[aria-current="page"] {
    background: rgba(231, 200, 115, 0.14);
  }

  /* 页脚 */
  .colophon__grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .colophon__brand {
    padding-bottom: 20px;
  }

  /* 容器 */
  .grid--12 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ribbon__item {
    min-width: 200px;
  }
}

@media (max-width: 560px) {
  .grid--12 {
    grid-template-columns: minmax(0, 1fr);
  }

  .display-metal {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .ribbon__item {
    min-width: 180px;
    min-height: 160px;
    padding: 22px 18px;
  }
}

/* ---------- 16 · 动效降级 ---------- */
@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;
    transition-delay: 0ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}