/* ============================================================
   财神到游戏 · Site Kit 共享样式
   路径：/assets/site.css
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-block-start: 140px;
}

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

:where(h1, h2, h3, h4) { font-weight: 700; line-height: 1.22; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色板 */
  --ink: #14100E;
  --ink-2: #241C17;
  --vermilion: #C8291D;
  --vermilion-hot: #E5432A;
  --gold: #D9A24A;
  --gold-lite: #F0CF8E;
  --jade: #1F4A3D;
  --cream: #F4EBDC;
  --cream-2: #E2D3BC;
  --text-ink: #1B1512;
  --muted: #7C6F62;

  --line-gold: rgba(217, 162, 74, 0.28);
  --line-gold-soft: rgba(217, 162, 74, 0.16);
  --on-ink: rgba(244, 235, 220, 0.78);
  --on-ink-dim: rgba(244, 235, 220, 0.55);

  /* 字体 */
  --font-display: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "Source Han Serif CN", STSong, SimSun, serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* 五档字阶 */
  --step-display: clamp(2.75rem, 7vw, 5.5rem);
  --step-chapter: clamp(1.75rem, 3.4vw, 2.5rem);
  --step-sub: clamp(1.25rem, 2vw, 1.625rem);
  --step-body: clamp(1rem, 1.1vw, 1.125rem);
  --step-index: 0.8125rem;

  /* 布局 */
  --maxw: 1200px;
  --gutter: clamp(18px, 4vw, 40px);
  --stack: 1.15em;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--text-ink);
  background-color: var(--cream);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

#main-content { outline: none; }

::selection {
  background: var(--vermilion);
  color: #FBF3E6;
}

/* ---------- 4. 焦点可见 ---------- */
:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--vermilion-hot);
  outline-offset: 3px;
  border-radius: 1px;
}

.masthead :where(a, button):focus-visible,
.footer :where(a, button):focus-visible {
  outline-color: var(--gold-lite);
  outline-offset: 4px;
}

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 300;
  transform: translate(-50%, -130%);
  padding: 12px 24px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.16em;
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-color: var(--ink);
}

/* ============================================================
   6. 刊头
   ============================================================ */
.masthead {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--cream);
  border-bottom: 1px solid var(--line-gold);
  isolation: isolate;
}

.masthead__inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.masthead__bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding-block: 18px 12px;
  transition: padding-block 0.24s var(--ease);
}

.masthead__tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.26em;
  color: var(--gold);
  white-space: nowrap;
}

.masthead__brand {
  justify-self: center;
  display: grid;
  gap: 3px;
  text-align: center;
  color: var(--cream);
  transition: color 0.18s var(--ease);
}

.masthead__brand:hover { color: var(--gold-lite); }

.masthead__brand-cn {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.5rem);
  line-height: 1.08;
  letter-spacing: 0.1em;
}

.masthead__brand-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--gold);
}

.masthead__date {
  justify-self: end;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.1em;
  white-space: nowrap;
  color: var(--on-ink);
}

.masthead__date-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.masthead__date time { color: var(--gold-lite); }

.masthead__rule {
  height: 1px;
  background: var(--gold);
  opacity: 0.38;
}

/* ---------- 6.1 导航 ---------- */
.nav { display: block; }

.nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0;
  padding-block: 10px 14px;
}

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

.nav__item + .nav__item::before {
  content: "";
  flex: none;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0.55;
  margin-inline: clamp(8px, 1.5vw, 16px);
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--on-ink);
  transition: color 0.18s var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--vermilion-hot);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s var(--ease);
}

.nav__link:hover { color: var(--gold-lite); }
.nav__link:hover::after { transform: scaleX(1); }

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

.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold);
}

/* ---------- 6.2 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 40px;
  border: 1px solid var(--line-gold);
  border-radius: 2px;
  color: var(--gold-lite);
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--gold);
  background: rgba(217, 162, 74, 0.1);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 6.3 滚动进度 ---------- */
.masthead__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(217, 162, 74, 0.14);
  pointer-events: none;
}

.masthead__progress > span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--vermilion-hot);
  transition: width 0.12s linear;
}

/* ---------- 6.4 折叠态 ---------- */
.masthead[data-collapsed="true"] .masthead__tag,
.masthead[data-collapsed="true"] .masthead__brand-en {
  display: none;
}

.masthead[data-collapsed="true"] .masthead__bar {
  padding-block: 9px 7px;
}

.masthead[data-collapsed="true"] .masthead__brand-cn {
  font-size: clamp(1.125rem, 1.8vw, 1.375rem);
  letter-spacing: 0.12em;
}

/* ---------- 6.5 平板与手机 ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .masthead__bar {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px;
    padding-block: 12px 10px;
  }

  .masthead__tag { display: none; }

  .masthead__brand {
    grid-column: 1;
    justify-self: start;
    text-align: left;
  }

  .masthead__brand-cn {
    font-size: 1.375rem;
    letter-spacing: 0.08em;
  }

  .masthead__brand-en {
    font-size: 9px;
    letter-spacing: 0.3em;
    text-indent: 0.3em;
  }

  .masthead__date {
    grid-column: 2;
    justify-self: end;
    font-size: 11px;
  }

  .masthead__date-label { display: none; }

  .nav-toggle { grid-column: 3; justify-self: end; }

  .nav { display: none; }

  .nav[data-open="true"] {
    display: block;
    border-top: 1px solid var(--line-gold-soft);
    padding-block-end: 10px;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding-block: 6px 4px;
  }

  .nav__item { display: block; }

  .nav__item + .nav__item {
    border-top: 1px solid var(--line-gold-soft);
  }

  .nav__item + .nav__item::before { display: none; }

  .nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
  }

  .nav__link::after {
    left: 4px;
    right: auto;
    width: 22px;
    bottom: 8px;
  }
}

/* ============================================================
   7. 页脚
   ============================================================ */
.footer {
  background: var(--ink);
  color: var(--on-ink-dim);
  border-top: 1px solid var(--line-gold);
  padding-block: clamp(48px, 7vw, 88px) 0;
}

.footer__inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.375rem, 2.4vw, 1.75rem);
  line-height: 1.2;
  letter-spacing: 0.12em;
  color: var(--cream);
}

.footer__note {
  margin-block-start: 14px;
  max-width: 24em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-ink-dim);
}

.footer__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.26em;
  color: var(--gold);
  margin-block-end: 16px;
}

.footer__links {
  display: grid;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.6;
}

.footer__links a {
  display: inline-block;
  color: var(--on-ink);
  transition: color 0.18s var(--ease);
}

.footer__links a:hover { color: var(--gold-lite); }

.footer__meta {
  margin-block-start: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  line-height: 2;
  color: var(--on-ink-dim);
  overflow-wrap: anywhere;
}

.footer__base {
  margin-block-start: clamp(32px, 5vw, 56px);
  padding-block: 20px 30px;
  border-top: 1px solid var(--line-gold-soft);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(244, 235, 220, 0.45);
}

@media (max-width: 900px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .footer__grid { grid-template-columns: 1fr; }
  .footer__base { justify-content: flex-start; }
}

/* ============================================================
   8. 通用布局与工具
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.chapter { padding-block: clamp(40px, 6vw, 84px); }

.chapter__num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.28em;
  color: var(--vermilion);
}

.chapter__num::before {
  content: "";
  flex: none;
  width: 30px;
  height: 2px;
  background: currentColor;
}

hr.section-band {
  border: 0;
  height: 10px;
  background: var(--vermilion);
}

hr.section-band--gold { background: var(--gold); }

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

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

@media (max-width: 820px) {
  .grid--12 { grid-template-columns: 1fr; }
}

.stack > * + * { margin-block-start: var(--stack); }

.mono {
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.1em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.24em;
  color: var(--vermilion);
}

.eyebrow::before {
  content: "";
  flex: none;
  width: 26px;
  height: 2px;
  background: currentColor;
}

.eyebrow--on-ink { color: var(--gold); }

.u-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   9. 面板
   ============================================================ */
.panel {
  position: relative;
  background: var(--ink-2);
  color: var(--cream);
  border: 1px solid var(--line-gold);
  padding: clamp(20px, 3vw, 34px);
}

.panel--cut {
  clip-path: polygon(
    0 0,
    calc(100% - 24px) 0,
    100% 24px,
    100% 100%,
    24px 100%,
    0 calc(100% - 24px)
  );
}

.panel--cream {
  background: var(--cream);
  color: var(--text-ink);
  border-color: var(--cream-2);
}

.panel--cream .eyebrow { color: var(--vermilion); }

/* ============================================================
   10. 按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  padding: 13px 26px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  border-radius: 2px;
  transition:
    transform 0.18s var(--ease),
    box-shadow 0.18s var(--ease),
    background-color 0.18s var(--ease),
    color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.btn:hover { transform: translateY(-4px); }
.btn:active { transform: translateY(-1px); }

.btn--primary {
  background: var(--vermilion);
  color: #FBF3E6;
}

.btn--primary:hover {
  background: var(--vermilion-hot);
  box-shadow: 0 10px 22px rgba(20, 16, 14, 0.35);
}

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

.btn--gold:hover {
  background: var(--gold-lite);
  box-shadow: 0 10px 22px rgba(20, 16, 14, 0.3);
}

.btn--ghost {
  border-color: var(--gold);
  color: var(--gold-lite);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--gold-lite);
  box-shadow: 0 10px 22px rgba(20, 16, 14, 0.3);
}

.btn--line {
  border-color: rgba(200, 41, 29, 0.45);
  color: var(--vermilion);
  background: transparent;
}

.btn--line:hover {
  border-color: var(--vermilion);
  background: var(--vermilion);
  color: #FBF3E6;
  box-shadow: 0 10px 22px rgba(20, 16, 14, 0.18);
}

/* ============================================================
   11. 标签
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.1em;
  border: 1px solid currentColor;
  border-radius: 1px;
  white-space: nowrap;
}

.tag--jade { color: #2A6A56; background: rgba(31, 74, 61, 0.09); }
.tag--gold { color: #8C6218; background: rgba(217, 162, 74, 0.16); }
.tag--red  { color: var(--vermilion); background: rgba(200, 41, 29, 0.08); }

.tag--ink {
  color: var(--cream-2);
  background: rgba(244, 235, 220, 0.08);
  border-color: var(--line-gold);
}

/* ============================================================
   12. 面包屑
   ============================================================ */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.1em;
  color: var(--muted);
}

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

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

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--gold);
  opacity: 0.85;
}

.breadcrumb__link {
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.breadcrumb__link:hover { color: var(--vermilion); }

.breadcrumb__current {
  color: var(--text-ink);
  font-weight: 500;
}

/* ============================================================
   13. 图片容器基础
   ============================================================ */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--line-gold);
  color: var(--cream);
}

.img-frame--cut {
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - 26px),
    calc(100% - 26px) 100%,
    0 100%
  );
}

.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame__placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  padding-block: clamp(28px, 6vw, 64px);
  font-family: var(--font-mono);
  font-size: var(--step-index);
  letter-spacing: 0.22em;
  color: var(--gold);
  background-color: var(--ink-2);
  background-image: repeating-linear-gradient(
    135deg,
    rgba(217, 162, 74, 0.1) 0 1px,
    transparent 1px 12px
  );
}

.img-frame__caption {
  padding-block: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

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

/* ============================================================
   14. 减少动态效果
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto !important; }

  .btn:hover,
  .btn:active { transform: none; }

  .skip-link { transition: none; }
}