/* =========================================================
   易发棋牌中心 · 共享 Site Kit
   /assets/site.css
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: #F6F1E7;
}

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

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

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

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

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

table { border-collapse: collapse; width: 100%; }

hr { border: 0; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩体系 */
  --ink-green: #123C32;
  --ink-green-lift: #1E5A4A;
  --paper: #F6F1E7;
  --ink: #101820;
  --amber: #C98A2B;
  --amber-ink: #8A5A12;
  --amber-soft: #F2D9A6;
  --cinnabar: #B23A2E;
  --cinnabar-deep: #8F2E24;
  --celadon: #4F7C82;
  --celadon-deep: #33565B;
  --sage: #5E6E63;
  --cream: #FFFDF8;

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

  /* 尺度 */
  --wrap: 1280px;
  --gutter: 20px;
  --radius-s: 4px;
  --radius-m: 10px;
  --radius-l: 22px;

  /* 阴影 */
  --shadow-card: 0 1px 0 rgba(16, 24, 32, .05), 0 14px 34px -24px rgba(16, 24, 32, .55);
  --shadow-glass: 0 18px 48px -32px rgba(16, 24, 32, .7);

  /* 缓动 */
  --ease: cubic-bezier(.2, .7, .3, 1);

  /* 滚动进度（JS 写入） */
  --scroll-progress: 0;
}

/* ---------- 3. 基础排版 ---------- */
html { font-size: 100%; }

body {
  position: relative;
  isolation: isolate;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
  background: transparent;
  letter-spacing: .01em;
  overflow-x: hidden;
}

/* 暖纸底 + 琥珀与青瓷氛围光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1180px 600px at 84% -12%, rgba(201, 138, 43, .18), transparent 62%),
    radial-gradient(880px 520px at 2% 14%, rgba(79, 124, 130, .13), transparent 60%),
    linear-gradient(180deg, #F6F1E7 0%, #F6F1E7 60%, #F1EADD 100%);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.012em;
  color: var(--ink-green);
  text-wrap: balance;
}

h1 { font-size: clamp(2.4rem, 6vw, 5.2rem); line-height: 1.06; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.7rem); }
h3 { font-size: clamp(1.18rem, 2vw, 1.5rem); }
h4 { font-size: 1.05rem; }

p { text-wrap: pretty; }

strong { color: var(--ink-green); font-weight: 700; }

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

/* 焦点可见 */
:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  box-shadow: 0 0 0 5px rgba(18, 60, 50, .32);
  border-radius: var(--radius-s);
}

/* ---------- 4. 工具类 ---------- */
.wrap {
  width: min(var(--wrap), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: .02em;
}

.stack > * + * { margin-top: var(--stack-gap, 16px); }

.divider-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(16, 24, 32, .2), rgba(16, 24, 32, 0));
}

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -120px;
  z-index: 300;
  padding: 11px 20px;
  border-radius: 0 0 var(--radius-m) var(--radius-m);
  background: var(--amber);
  color: var(--ink-green);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .04em;
  transition: top .22s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  isolation: isolate;
}

/* 滚动进度线 */
.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left center;
  background: linear-gradient(90deg, var(--amber) 0%, var(--amber) 32%, var(--cinnabar) 66%, var(--celadon) 100%);
  pointer-events: none;
  z-index: 3;
}

/* 上层：品牌署名 + 校订批次 */
.header-strip {
  background-color: var(--ink-green);
  background-image:
    linear-gradient(90deg, rgba(201, 138, 43, .22), rgba(18, 60, 50, 0) 46%),
    linear-gradient(270deg, rgba(79, 124, 130, .28), rgba(18, 60, 50, 0) 44%);
  color: var(--paper);
}

.header-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding-block: 9px;
  font-size: .8rem;
}

.brand-signature {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-signature__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 27px;
  height: 27px;
  border-radius: 3px;
  background: var(--amber);
  color: var(--ink-green);
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: .84rem;
  line-height: 1;
  letter-spacing: 0;
}

.brand-signature__text {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: .88rem;
  letter-spacing: .1em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--cream);
}

.batch-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 13px;
  border: 1px solid rgba(246, 241, 231, .22);
  border-radius: 999px;
  background: rgba(246, 241, 231, .09);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  font-size: .73rem;
  letter-spacing: .1em;
  color: rgba(246, 241, 231, .7);
  white-space: nowrap;
}

.batch-tag__value {
  color: var(--amber-soft);
  font-size: .78rem;
  letter-spacing: .04em;
}

/* 下层：玻璃导航条 */
.header-bar {
  position: relative;
  background: rgba(255, 253, 248, .82);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  backdrop-filter: blur(12px) saturate(1.1);
  border-bottom: 1px solid rgba(16, 24, 32, .1);
  box-shadow: var(--shadow-glass);
}

.header-bar__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 64px;
  padding-block: 8px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 15px 8px 12px;
  border: 1px solid rgba(18, 60, 50, .26);
  border-radius: 999px;
  color: var(--ink-green);
  font-size: .86rem;
  font-weight: 700;
  letter-spacing: .08em;
  background: rgba(255, 253, 248, .6);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
  flex: none;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .26s var(--ease), opacity .2s var(--ease);
}

.header-bar[data-open] .nav-toggle { background: var(--ink-green); color: var(--cream); border-color: var(--ink-green); }
.header-bar[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.header-bar[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.header-bar[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.primary-nav { flex: 1 1 auto; min-width: 0; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
}

.nav-list a {
  display: block;
  padding: 9px 15px;
  border-radius: 999px;
  font-size: .95rem;
  color: var(--ink-green);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.nav-list a:hover { background: rgba(18, 60, 50, .09); }

.nav-list a[aria-current="page"] {
  background: var(--ink-green);
  color: var(--cream);
  font-weight: 700;
}

.header-cta {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--amber);
  color: var(--ink-green);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .04em;
  box-shadow: 0 10px 22px -14px rgba(201, 138, 43, .95);
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}

.header-cta:hover {
  background: var(--amber-soft);
  transform: translateY(-1px);
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 112px);
  background: var(--ink-green);
  color: rgba(246, 241, 231, .84);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(201, 138, 43, .18), rgba(18, 60, 50, 0) 34%),
    radial-gradient(720px 360px at 90% 104%, rgba(79, 124, 130, .3), transparent 72%);
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(210px, 1.05fr) minmax(180px, .95fr) minmax(280px, 1.3fr);
  gap: clamp(26px, 4vw, 64px);
  padding-block: clamp(42px, 6vw, 78px) clamp(28px, 4vw, 44px);
}

.footer-wordmark {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--cream);
  letter-spacing: .04em;
  line-height: 1.25;
}

.footer-tagline {
  margin-top: 8px;
  font-size: .93rem;
  line-height: 1.7;
  color: rgba(246, 241, 231, .68);
}

.footer-seal {
  display: inline-block;
  margin-top: 18px;
  padding: 5px 13px;
  border: 1px dashed rgba(201, 138, 43, .62);
  border-radius: 999px;
  color: var(--amber-soft);
  font-size: .72rem;
  letter-spacing: .14em;
}

.footer-title {
  font-family: var(--font-sans);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--amber);
  margin-bottom: 15px;
}

.footer-list li {
  margin-bottom: 9px;
  font-size: .93rem;
  line-height: 1.6;
}

.footer-list a {
  color: rgba(246, 241, 231, .84);
  border-bottom: 1px solid rgba(246, 241, 231, .18);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.footer-list a:hover {
  color: var(--amber-soft);
  border-bottom-color: rgba(201, 138, 43, .7);
}

.footer-list--minor {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(246, 241, 231, .14);
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-list--minor li { margin-bottom: 0; }

.footer-list--plain li {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 10px;
}

.footer-key {
  flex: none;
  width: 4.6em;
  font-size: .78rem;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .52);
}

.footer-note {
  margin-top: 18px;
  padding-left: 13px;
  border-left: 2px solid rgba(201, 138, 43, .55);
  font-size: .8rem;
  line-height: 1.72;
  color: rgba(246, 241, 231, .62);
}

.footer-base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 20px 26px;
  border-top: 1px solid rgba(246, 241, 231, .14);
  font-size: .78rem;
  color: rgba(246, 241, 231, .55);
}

.footer-base__meta { max-width: 52ch; }

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-align: center;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--amber { background: var(--amber); color: var(--ink-green); }
.btn--amber:hover { background: var(--amber-soft); }

.btn--ink { background: var(--ink-green); color: var(--cream); }
.btn--ink:hover { background: var(--ink-green-lift); }

.btn--ghost {
  background: transparent;
  color: var(--ink-green);
  border-color: rgba(18, 60, 50, .34);
}
.btn--ghost:hover { background: rgba(18, 60, 50, .07); border-color: var(--ink-green); }

.btn--cinnabar { background: var(--cinnabar); color: var(--cream); }
.btn--cinnabar:hover { background: var(--cinnabar-deep); }

.btn--small { padding: 8px 17px; font-size: .85rem; }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  font-size: .8rem;
  color: var(--sage);
  letter-spacing: .04em;
}

.breadcrumb a {
  color: var(--ink-green);
  border-bottom: 1px solid rgba(18, 60, 50, .28);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.breadcrumb a:hover { color: var(--amber-ink); border-bottom-color: var(--amber); }

.breadcrumb__sep { color: rgba(94, 110, 99, .6); }

/* ---------- 10. 正文容器 ---------- */
.prose { max-width: 68ch; }

.prose > * + * { margin-top: 1.15em; }

.prose h2,
.prose h3 { margin-top: 2em; }

.prose h2 + *,
.prose h3 + * { margin-top: .7em; }

.prose ul,
.prose ol { padding-left: 1.35em; }

.prose ul { list-style: none; padding-left: 1.2em; }

.prose ul li {
  position: relative;
  padding-left: 1.05em;
  margin-top: .5em;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 6px;
  height: 6px;
  background: var(--amber);
  transform: rotate(45deg);
}

.prose ol { list-style: decimal; }
.prose ol li { margin-top: .5em; padding-left: .2em; }

.prose blockquote {
  border-left: 3px solid var(--celadon);
  padding: 4px 0 4px 20px;
  font-family: var(--font-serif);
  font-size: 1.08rem;
  color: var(--ink-green);
}

.prose code {
  font-family: var(--font-mono);
  font-size: .88em;
  background: var(--amber-soft);
  color: var(--amber-ink);
  padding: 2px 6px;
  border-radius: var(--radius-s);
}

.prose a {
  color: var(--ink-green);
  border-bottom: 1px solid var(--amber);
}
.prose a:hover { background: var(--amber-soft); }

/* ---------- 11. 章节骨架 ---------- */
.section {
  position: relative;
  padding-block: clamp(40px, 6vw, 88px);
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px 28px;
  flex-wrap: wrap;
  margin-bottom: clamp(22px, 3vw, 42px);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .73rem;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--amber-ink);
}

/* ---------- 12. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(201, 138, 43, .42);
  background: var(--amber-soft);
  color: var(--amber-ink);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  white-space: nowrap;
}

.tag--celadon {
  background: rgba(79, 124, 130, .14);
  border-color: rgba(79, 124, 130, .38);
  color: var(--celadon-deep);
}

.tag--cinnabar {
  background: rgba(178, 58, 46, .12);
  border-color: rgba(178, 58, 46, .36);
  color: var(--cinnabar-deep);
}

.tag--ink {
  background: rgba(18, 60, 50, .1);
  border-color: rgba(18, 60, 50, .26);
  color: var(--ink-green);
}

/* ---------- 13. 资料卡 ---------- */
.card {
  position: relative;
  background: var(--cream);
  border: 1px solid rgba(16, 24, 32, .09);
  border-radius: var(--radius-m);
  padding: clamp(18px, 2.4vw, 28px);
  box-shadow: var(--shadow-card);
}

.card__title {
  font-family: var(--font-serif);
  font-size: 1.14rem;
  font-weight: 700;
  color: var(--ink-green);
  margin-bottom: 8px;
  line-height: 1.35;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: .77rem;
  letter-spacing: .05em;
  color: var(--sage);
}

/* ---------- 14. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 28px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 15. 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-m);
  border: 1px solid rgba(16, 24, 32, .12);
  background: var(--ink-green);
}

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

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

.media--placeholder {
  background-color: var(--ink-green);
  background-image: linear-gradient(135deg, #123C32 0%, #1E5A4A 54%, #2E6B57 100%);
}

.media--placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(246, 241, 231, .07) 0 2px,
    rgba(246, 241, 231, 0) 2px 9px
  );
}

/* ---------- 16. 显现协议 ---------- */
.js-reveal .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .62s var(--ease), transform .62s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.js-reveal .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1120px) {
  .nav-list a { padding: 8px 11px; font-size: .88rem; }
  .header-cta { padding: 9px 15px; font-size: .84rem; }
}

@media (max-width: 1020px) {
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  body { font-size: 16.5px; }

  .nav-toggle { display: inline-flex; order: 1; }
  .header-cta { order: 2; margin-left: auto; }

  .header-bar__inner {
    flex-wrap: wrap;
    gap: 10px;
    padding-block: 9px;
    min-height: 0;
  }

  .primary-nav {
    order: 3;
    flex: 1 1 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height .36s var(--ease);
  }

  .header-bar[data-open] .primary-nav { max-height: 34rem; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 5px;
    padding-bottom: 14px;
  }

  .nav-list a {
    padding: 13px 16px;
    border-radius: var(--radius-m);
    border: 1px solid rgba(18, 60, 50, .12);
    background: rgba(255, 253, 248, .72);
    font-size: .97rem;
  }

  .nav-list a[aria-current="page"] { border-color: var(--ink-green); }
}

@media (max-width: 680px) {
  :root { --gutter: 16px; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

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

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

  .brand-signature__text { font-size: .78rem; letter-spacing: .04em; }

  .batch-tag { padding: 4px 10px; letter-spacing: .06em; }

  .batch-tag__label { display: none; }

  .footer-list--plain li { flex-direction: column; gap: 2px; }

  .footer-key { width: auto; }
}

/* ---------- 18. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .js-reveal .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .site-header::after { transition: none !important; }
}