/* ============================================================
   麻将胡了 · 共享样式 /assets/site.css
   ============================================================ */

:root {
  --felt: #0E3B2E;
  --felt-deep: #08251D;
  --paper: #F5F0E4;
  --card: #FBF8F0;
  --cinnabar: #B02E20;
  --gold: #C9A227;
  --cyan: #1F6F8F;
  --violet: #5B3E8E;
  --moss: #5F7568;
  --ink: #1A1A18;

  --line: rgba(26, 26, 24, .12);
  --line-strong: rgba(26, 26, 24, .22);
  --line-light: rgba(245, 240, 228, .16);
  --line-gold: rgba(201, 162, 39, .52);

  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --pill: 999px;

  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 48px);
  --flow: clamp(56px, 8vw, 112px);

  --font-display: "Noto Serif SC", "Source Serif 4", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul, ol { padding: 0; }

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

a { color: inherit; }

button { font: inherit; color: inherit; }

main { display: block; }

[hidden] { display: none !important; }

:focus-visible {
  outline: 3px solid var(--cinnabar);
  outline-offset: 2px;
  border-radius: 4px;
}

.site-header :focus-visible,
.site-footer :focus-visible { outline-color: var(--gold); }

/* ---------- 排版基线 ---------- */
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -.01em; }

p { max-width: 68ch; }

/* ---------- 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--flow); }
.section--tight { padding-block: clamp(36px, 5vw, 64px); }

.measure { max-width: 68ch; }

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

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

/* ---------- 文字组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 500 12px/1.2 var(--font-body);
  letter-spacing: .18em;
  color: var(--moss);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
}

.section-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--felt-deep);
}

.lede {
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.75;
  color: rgba(26, 26, 24, .8);
  max-width: 60ch;
}

.data-number {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(48px, 6vw, 84px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--felt);
}

/* ---------- 按钮与链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--pill);
  border: 1px solid transparent;
  font: 600 14px/1 var(--font-body);
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), box-shadow .18s var(--ease);
}
.btn--primary {
  background: var(--cinnabar);
  color: var(--card);
  box-shadow: 0 12px 24px -18px rgba(176, 46, 32, .95);
}
.btn--primary:hover {
  background: #C63728;
  transform: translateY(-1px);
}

.link-quiet {
  display: inline-block;
  padding: 8px 2px;
  font: 500 13px/1 var(--font-body);
  letter-spacing: .08em;
  color: rgba(245, 240, 228, .78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.link-quiet:hover {
  color: var(--paper);
  border-bottom-color: var(--gold);
}

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  transform: translateY(-180%);
  padding: 11px 20px;
  border-radius: var(--pill);
  background: var(--paper);
  color: var(--felt-deep);
  font: 600 14px/1 var(--font-body);
  letter-spacing: .06em;
  text-decoration: none;
  box-shadow: 0 14px 30px -16px rgba(8, 37, 29, .85);
  transition: transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--felt);
  color: var(--paper);
  box-shadow: 0 18px 34px -32px rgba(8, 37, 29, .9);
}

.progress-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: rgba(245, 240, 228, .1);
  overflow: hidden;
  pointer-events: none;
}
.progress-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold));
  transition: width .12s linear;
}

.masthead {
  background: var(--felt);
  border-bottom: 1px solid var(--line-light);
}
.masthead__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 78px;
  padding-block: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  text-decoration: none;
  color: var(--paper);
}
.brand__mark {
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--card);
  box-shadow: inset 0 0 0 1px var(--line-gold), 0 8px 16px -12px rgba(0, 0, 0, .8);
  flex: none;
}
.brand__mark::before {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 5px;
  border: 2px solid var(--felt);
}
.brand__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cinnabar);
  transform: translate(-50%, -50%);
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  letter-spacing: .06em;
  color: var(--paper);
}
.brand__suffix {
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--gold);
}

.brand__tagline {
  margin: 0;
  padding-left: clamp(12px, 2vw, 26px);
  border-left: 1px solid var(--line-light);
  font: 500 13px/1.5 var(--font-body);
  letter-spacing: .1em;
  color: rgba(245, 240, 228, .62);
}

.masthead__tools {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 16px);
  margin-left: auto;
}

.search-box { display: flex; align-items: center; }
.search-box__input {
  width: clamp(180px, 20vw, 250px);
  padding: 10px 16px;
  border-radius: var(--pill);
  border: 1px solid rgba(245, 240, 228, .26);
  background: rgba(245, 240, 228, .08);
  color: var(--paper);
  font: 400 14px/1.4 var(--font-body);
  letter-spacing: .02em;
  transition: border-color .18s var(--ease), background .18s var(--ease), box-shadow .18s var(--ease);
}
.search-box__input::placeholder { color: rgba(245, 240, 228, .52); }
.search-box__input:hover { background: rgba(245, 240, 228, .13); }
.search-box__input:focus-visible {
  outline: none;
  border-color: var(--gold);
  background: rgba(245, 240, 228, .16);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, .28);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border-radius: var(--pill);
  border: 1px solid rgba(245, 240, 228, .3);
  background: transparent;
  color: var(--paper);
  font: 500 13px/1 var(--font-body);
  letter-spacing: .1em;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover { background: rgba(245, 240, 228, .1); border-color: var(--line-gold); }
.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.tabbar {
  background: var(--felt-deep);
  border-top: 1px solid rgba(201, 162, 39, .22);
}
.tabbar__inner { display: flex; align-items: center; }

.primary-nav { width: 100%; min-width: 0; }

.nav-tiles {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 9px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.nav-tiles::-webkit-scrollbar { display: none; }

.nav-tile {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border-radius: var(--pill);
  border: 1px solid rgba(245, 240, 228, .2);
  color: rgba(245, 240, 228, .86);
  font: 500 14px/1 var(--font-body);
  letter-spacing: .05em;
  white-space: nowrap;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.nav-tile:hover {
  background: rgba(245, 240, 228, .12);
  border-color: rgba(245, 240, 228, .38);
  color: var(--paper);
  transform: translateY(-1px);
}
.nav-tile[data-match] {
  border-color: var(--gold);
  color: #F0DCA0;
  box-shadow: inset 0 0 0 1px rgba(201, 162, 39, .35);
}
.nav-tile[aria-current="page"] {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--felt-deep);
  font-weight: 700;
}
.nav-tile[aria-current="page"]:hover {
  background: var(--paper);
  color: var(--felt-deep);
  transform: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--felt-deep);
  color: rgba(245, 240, 228, .82);
  padding-bottom: clamp(20px, 3vw, 32px);
}

.footer-edge {
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(201, 162, 39, .8) 20%, rgba(201, 162, 39, .8) 80%, transparent);
}

.footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(28px, 4vw, 54px) clamp(20px, 3vw, 44px);
  padding-block: clamp(44px, 6vw, 76px) clamp(30px, 4vw, 48px);
}

.footer__col { min-width: 0; }

.footer__heading {
  margin-bottom: 18px;
  font: 700 12px/1.2 var(--font-body);
  letter-spacing: .18em;
  color: var(--gold);
}

.footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.footer__link {
  display: inline-block;
  font: 400 14.5px/1.5 var(--font-body);
  letter-spacing: .03em;
  color: rgba(245, 240, 228, .8);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer__link:hover {
  color: var(--paper);
  border-bottom-color: var(--gold);
}

.footer__member {
  display: inline-flex;
  align-items: center;
  margin-top: 18px;
  padding: 10px 20px;
  border-radius: var(--pill);
  border: 1px solid rgba(201, 162, 39, .55);
  color: #E6CE7B;
  font: 600 13px/1 var(--font-body);
  letter-spacing: .12em;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.footer__member:hover {
  background: rgba(201, 162, 39, .16);
  border-color: var(--gold);
  color: #F6E7B4;
}

.contact-line {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  margin-bottom: 9px;
  max-width: none;
}
.contact-line__key {
  font: 500 12px/1.7 var(--font-body);
  letter-spacing: .08em;
  color: rgba(245, 240, 228, .48);
}
.contact-line__value {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .02em;
  line-height: 1.7;
  color: rgba(245, 240, 228, .9);
  word-break: break-word;
}

.footer__note {
  margin-top: 16px;
  max-width: 32ch;
  font: 400 13px/1.75 var(--font-body);
  color: rgba(245, 240, 228, .55);
}

.footer__closing {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.32;
  letter-spacing: .01em;
  color: var(--paper);
}
.footer__desc {
  margin-top: 14px;
  max-width: 34ch;
  font: 400 14px/1.75 var(--font-body);
  color: rgba(245, 240, 228, .66);
}

.footer__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(245, 240, 228, .14);
  font-size: 13px;
  color: rgba(245, 240, 228, .56);
}
.footer__copyright { letter-spacing: .04em; max-width: none; }
.footer__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; max-width: none; }
.footer__icp {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: rgba(245, 240, 228, .62);
}

/* ---------- 面包屑 ---------- */
.breadcrumb { font: 500 13px/1.5 var(--font-body); letter-spacing: .04em; color: var(--moss); }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__item::after { content: "›"; color: rgba(95, 117, 104, .55); }
.breadcrumb__item:last-child::after { content: none; }
.breadcrumb__link {
  color: var(--moss);
  text-decoration: none;
  transition: color .18s var(--ease);
}
.breadcrumb__link:hover { color: var(--felt); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 标签与卡片 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--pill);
  border: 1px solid var(--line-strong);
  background: var(--card);
  color: var(--felt);
  font: 500 12px/1.3 var(--font-body);
  letter-spacing: .08em;
  white-space: nowrap;
}
.tag--gold {
  border-color: var(--line-gold);
  background: rgba(201, 162, 39, .13);
  color: #6E5A12;
}
.tag--replay {
  border-color: rgba(31, 111, 143, .42);
  background: rgba(31, 111, 143, .09);
  color: var(--cyan);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 2.4vw, 30px);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 20px 42px -30px rgba(8, 37, 29, .55);
}
.card__title {
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.32;
  color: var(--felt-deep);
}
.card__text {
  font: 400 15px/1.72 var(--font-body);
  color: rgba(26, 26, 24, .78);
  max-width: none;
}

/* ---------- 锚点目录 ---------- */
.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border-radius: var(--pill);
  border: 1px solid var(--line-strong);
  color: var(--moss);
  font: 500 13px/1.2 var(--font-body);
  letter-spacing: .05em;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.toc__link:hover { border-color: var(--felt); color: var(--felt); }
.toc__link[aria-current="true"] {
  background: var(--felt);
  border-color: var(--felt);
  color: var(--paper);
}

/* ---------- 图片容器基础规则 ---------- */
.figure { margin: 0; }
.figure__media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(120% 100% at 18% 0%, rgba(201, 162, 39, .2), transparent 62%),
    linear-gradient(155deg, var(--felt) 0%, var(--felt-deep) 100%);
}
.figure__media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(245, 240, 228, .16) 1px, transparent 1px);
  background-size: 4px 4px;
  opacity: .55;
}
.figure__caption {
  margin-top: 10px;
  font: 400 13px/1.65 var(--font-body);
  letter-spacing: .04em;
  color: var(--moss);
  max-width: 56ch;
}

/* ---------- 滚动显现 ---------- */
[data-reveal] {
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
[data-reveal][data-reveal-state="pending"] {
  opacity: 0;
  transform: translateY(14px);
}
[data-reveal][data-reveal-state="visible"] {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 120px; }

  .masthead__inner {
    flex-wrap: wrap;
    min-height: 0;
    padding-block: 12px;
    gap: 10px 14px;
  }
  .brand__tagline { display: none; }
  .brand__name { font-size: 19px; }

  .masthead__tools {
    gap: 8px;
    margin-left: auto;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
  .search-box { order: 3; flex: 1 1 100%; }
  .search-box__input { width: 100%; }
  .btn--primary { padding: 10px 16px; font-size: 13px; }
  .link-quiet { display: none; }

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

  .primary-nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s var(--ease);
  }
  .primary-nav[data-open] {
    max-height: 72vh;
    overflow-y: auto;
  }
  .nav-tiles {
    flex-direction: column;
    padding: 6px 0 14px;
    overflow-x: visible;
  }
  .nav-tile {
    width: 100%;
    justify-content: space-between;
    padding: 12px 18px;
    font-size: 15px;
  }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .contact-line { grid-template-columns: 68px minmax(0, 1fr); }
  .footer__closing { font-size: 24px; }
  .footer__bar { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 460px) {
  .brand__mark { width: 36px; height: 36px; border-radius: 10px; }
  .brand__mark::before { inset: 8px; }
  .brand__name { font-size: 17px; }
  .brand__suffix { letter-spacing: .18em; }
  .btn--primary { padding: 9px 14px; }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .progress-fill { transition: none; }
}