/* ============================================================
   易丰娱乐会馆 · 共享样式表 /assets/site.css
   深墨绿 + 暖金 + 珊瑚橙 + 暖纸 · 印刷档案质感
   ============================================================ */

/* ---------- 1. 复位 ---------- */
*,
*::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 { margin: 0; }

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

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

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

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

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink-green: #0F2E22;
  --ink-green-2: #1C4A36;
  --gold: #C9A227;
  --gold-soft: #E8D48B;
  --coral: #E8734A;
  --paper: #F4EFE4;
  --paper-white: #FBF8F1;
  --ink: #1A1A1A;
  --grey: #6B6B6B;
  --ok: #2E7D5B;

  --rule: rgba(15, 46, 34, 0.16);
  --rule-gold: rgba(201, 162, 39, 0.42);
  --rule-gold-soft: rgba(232, 212, 139, 0.26);

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;

  --shell: 1200px;
  --gutter: clamp(1.15rem, 4.2vw, 3.25rem);
  --stack: clamp(2.6rem, 6vw, 5rem);

  --shadow-plate: 0 1px 0 rgba(26, 26, 26, 0.06), 0 18px 40px -28px rgba(15, 46, 34, 0.5);
  --shadow-lift: 0 2px 0 rgba(26, 26, 26, 0.08), 0 28px 48px -26px rgba(15, 46, 34, 0.55);
}

/* ---------- 3. 中文排版与页面底色 ---------- */
body {
  font-family: var(--font-sans);
  font-size: clamp(0.95rem, 0.72vw + 0.78rem, 1.05rem);
  font-weight: 400;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(120% 58% at 8% 0%, rgba(201, 162, 39, 0.11), transparent 56%),
    radial-gradient(90% 48% at 100% 10%, rgba(232, 115, 74, 0.07), transparent 60%),
    repeating-linear-gradient(0deg, rgba(26, 26, 26, 0.018) 0 1px, transparent 1px 5px);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.012em;
  color: var(--ink-green);
}

h1 { font-size: clamp(2.1rem, 5.2vw, 3.9rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.18rem, 1.9vw, 1.55rem); }
h4 { font-size: 1.05rem; letter-spacing: 0; }

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

small { font-size: 0.82rem; color: var(--grey); }

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

/* ---------- 4. 焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* ---------- 5. 跳至正文 ---------- */
.skip-link {
  position: fixed;
  top: 0.6rem;
  left: 0.6rem;
  z-index: 200;
  transform: translateY(-220%);
  padding: 0.66rem 1.15rem;
  background: var(--gold);
  color: var(--ink-green);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 2px;
  transition: transform 0.18s ease;
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 6. 页头 ---------- */
.site-header {
  position: relative;
  z-index: 40;
  background: var(--ink-green);
  color: var(--paper-white);
  border-bottom: 1px solid var(--gold);
}

.site-header::after {
  content: "";
  display: block;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, var(--gold) 0 1px, transparent 1px 12px);
  opacity: 0.34;
  pointer-events: none;
}

.header-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(1.15rem, 2.6vw, 1.7rem) var(--gutter) clamp(0.85rem, 2vw, 1.15rem);
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  align-items: end;
  gap: 1rem 3rem;
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--gold);
}

.brand-mark {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.35rem, 2.5vw, 1.95rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--paper-white);
  transition: color 0.18s ease;
}

.brand-mark:hover { color: var(--gold-soft); }

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.5;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.primary-nav {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  border-top: 1px solid var(--rule-gold-soft);
  padding-top: 0.6rem;
}

.nav-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--gold-soft);
  opacity: 0.72;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.2rem;
}

.nav-list a {
  display: inline-block;
  padding: 0.4rem 0.72rem;
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: rgba(251, 248, 241, 0.85);
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.nav-list a:hover {
  color: var(--gold-soft);
  background: rgba(28, 74, 54, 0.85);
  border-color: rgba(201, 162, 39, 0.5);
}

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid rgba(232, 212, 139, 0.45);
  border-radius: 2px;
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.nav-toggle:hover { background: rgba(28, 74, 54, 0.9); }

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

.nav-toggle-glyph {
  font-size: 1rem;
  line-height: 1;
}

.nav-toggle-glyph::before { content: "≡"; }

.nav-toggle[aria-expanded="true"] .nav-toggle-glyph::before { content: "×"; }

.nav-toggle-label { font-size: 0.72rem; }

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--stack);
  background: var(--ink-green);
  color: rgba(251, 248, 241, 0.82);
  border-top: 1px solid var(--gold);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, var(--gold) 0 1px, transparent 1px 14px);
  opacity: 0.3;
  pointer-events: none;
}

.footer-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(2.6rem, 6vw, 4.2rem) var(--gutter) clamp(1.4rem, 3vw, 2rem);
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr) minmax(0, 1fr);
  gap: clamp(1.8rem, 4vw, 3.4rem);
  align-items: start;
}

.footer-ledger {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.footer-brand {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  line-height: 1.2;
  color: var(--paper-white);
  padding-left: 0.8rem;
  border-left: 3px solid var(--gold);
}

.footer-statement {
  font-size: 0.93rem;
  line-height: 1.85;
  color: rgba(251, 248, 241, 0.74);
  max-width: 46ch;
}

.footer-note {
  font-size: 0.79rem;
  line-height: 1.75;
  color: rgba(251, 248, 241, 0.5);
  max-width: 46ch;
}

.footer-index-title,
.footer-contact-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 0.85rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem 1rem;
}

.footer-links a {
  display: inline-block;
  padding: 0.22rem 0;
  font-size: 0.9rem;
  color: rgba(251, 248, 241, 0.8);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-links a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--rule-gold);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 0.9rem;
}

.footer-contact-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: baseline;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(251, 248, 241, 0.85);
}

.footer-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--gold);
  white-space: nowrap;
}

.footer-base {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 1rem var(--gutter) 1.9rem;
  border-top: 1px solid rgba(232, 212, 139, 0.18);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: rgba(251, 248, 241, 0.5);
}

.footer-copy { color: rgba(251, 248, 241, 0.5); }

.footer-icp { color: rgba(232, 212, 139, 0.78); }

/* ---------- 8. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--tight { max-width: 880px; }

.reading { max-width: 68ch; }

.reading p + p { margin-top: 1em; }

.rail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 3vw, 2.6rem);
}

.rail { align-self: start; }

/* ---------- 9. 章节头 ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.1rem;
  padding-bottom: 0.85rem;
  border-bottom: 2px solid var(--ink-green);
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.section-index {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 2.1rem);
  font-weight: 500;
  line-height: 1;
  color: var(--gold);
}

.section-title {
  margin: 0;
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
}

.section-kicker {
  flex-basis: 100%;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.14em;
  color: var(--grey);
}

.coord {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--grey);
}

.coord::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
  flex: none;
}

.lede {
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  line-height: 1.85;
  color: var(--ink-green-2);
  max-width: 62ch;
}

.divider {
  height: 1px;
  border: 0;
  margin: clamp(1.6rem, 4vw, 3rem) 0;
  background-image: repeating-linear-gradient(90deg, var(--rule) 0 2px, transparent 2px 8px);
}

/* ---------- 10. 纸张卡片 ---------- */
.plate {
  position: relative;
  background: var(--paper-white);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: clamp(1.2rem, 2.4vw, 1.9rem);
  box-shadow: var(--shadow-plate);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.plate--lift:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
  border-color: var(--rule-gold);
}

.plate--accent::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--gold), var(--coral));
}

.plate--dark {
  background: var(--ink-green);
  border-color: rgba(232, 212, 139, 0.25);
  color: rgba(251, 248, 241, 0.85);
}

.plate--dark h2,
.plate--dark h3,
.plate--dark h4 { color: var(--paper-white); }

.plate--dark .lede { color: rgba(251, 248, 241, 0.78); }

/* ---------- 11. 标签 ---------- */
.tag {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--ink-green);
  background: rgba(232, 212, 139, 0.5);
  border: 1px solid var(--rule-gold);
  border-radius: 2px;
}

.tag--coral {
  color: #FFFFFF;
  background: var(--coral);
  border-color: var(--coral);
}

.tag--ink {
  color: var(--gold-soft);
  background: var(--ink-green-2);
  border-color: rgba(232, 212, 139, 0.35);
}

/* ---------- 12. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.4rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease,
    color 0.18s ease, border-color 0.18s ease;
}

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

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

.btn--gold:hover {
  background: var(--gold-soft);
  border-color: var(--gold-soft);
  box-shadow: 0 12px 24px -14px rgba(201, 162, 39, 0.95);
}

.btn--coral {
  background: var(--coral);
  color: #FFFFFF;
  border-color: var(--coral);
}

.btn--coral:hover {
  background: #D4613A;
  border-color: #D4613A;
  box-shadow: 0 12px 24px -14px rgba(232, 115, 74, 0.95);
}

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

.btn--ink:hover {
  background: var(--ink-green-2);
  border-color: var(--ink-green-2);
}

.btn--ghost {
  background: transparent;
  color: var(--ink-green);
  border-color: var(--rule);
}

.btn--ghost:hover {
  border-color: var(--gold);
  color: var(--ink-green);
  box-shadow: 0 10px 22px -18px rgba(15, 46, 34, 0.8);
}

.btn--ghost-on-dark {
  background: transparent;
  color: var(--gold-soft);
  border-color: rgba(232, 212, 139, 0.5);
}

.btn--ghost-on-dark:hover {
  background: rgba(201, 162, 39, 0.16);
  border-color: var(--gold);
}

/* ---------- 13. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--grey);
}

.breadcrumb a {
  color: var(--ink-green-2);
  border-bottom: 1px solid var(--rule);
  transition: color 0.16s ease, border-color 0.16s ease;
}

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

.breadcrumb li + li::before {
  content: "/";
  color: var(--gold);
  opacity: 0.7;
}

/* ---------- 14. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(1.2rem, 2.6vw, 2rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }

.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 258px), 1fr)); }

.grid--split {
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  align-items: start;
}

/* ---------- 15. 图片容器 ---------- */
.figure {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--ink-green-2);
  border: 1px solid var(--rule-gold);
  border-radius: 2px;
}

.figure > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease, opacity 0.3s ease;
}

.figure:hover > img { transform: scale(1.03); }

.figure--wide { aspect-ratio: 21 / 9; }

.figure--tall { aspect-ratio: 3 / 4; }

.figure--square { aspect-ratio: 1 / 1; }

.figure--band { aspect-ratio: 5 / 2; }

.figure--placeholder {
  background-image:
    repeating-linear-gradient(135deg, rgba(232, 212, 139, 0.12) 0 12px, transparent 12px 24px),
    linear-gradient(150deg, var(--ink-green) 0%, var(--ink-green-2) 100%);
}

.figure--placeholder::after {
  content: attr(data-label);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 88%;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  line-height: 1.7;
  color: var(--gold-soft);
}

.figure-caption {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 16. 显现与返回顶部 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.to-top {
  position: fixed;
  right: clamp(0.8rem, 3vw, 1.8rem);
  bottom: clamp(0.8rem, 3vw, 1.8rem);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.9rem;
  height: 2.9rem;
  border: 1px solid var(--rule-gold);
  border-radius: 50%;
  background: var(--ink-green);
  color: var(--gold-soft);
  font-size: 1rem;
  line-height: 1;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease,
    background-color 0.2s ease, border-color 0.2s ease;
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  background: var(--ink-green-2);
  border-color: var(--gold);
}

/* ---------- 17. 断点 ---------- */
@media (min-width: 720px) {
  .reveal[data-delay="1"] { transition-delay: 0.08s; }
  .reveal[data-delay="2"] { transition-delay: 0.16s; }
  .reveal[data-delay="3"] { transition-delay: 0.24s; }
}

@media (min-width: 980px) {
  .rail-layout {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: clamp(1.6rem, 3.5vw, 3.2rem);
  }
  .rail {
    position: sticky;
    top: 1.6rem;
  }
}

@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-ledger { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.9rem;
  }

  .brand-block {
    padding-left: 0.7rem;
    border-left-width: 2px;
  }

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

  .primary-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    align-items: flex-start;
    width: 100%;
    border-top: 0;
    padding-top: 0;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.22s ease, visibility 0.3s ease;
  }

  .primary-nav[data-open="true"] {
    max-height: 60rem;
    opacity: 1;
    visibility: visible;
    margin-top: 0.95rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--rule-gold-soft);
  }

  .nav-list {
    justify-content: flex-start;
    width: 100%;
  }

  .nav-list li { width: 100%; }

  .nav-list a {
    display: block;
    padding: 0.7rem 0.8rem;
    border-radius: 0;
    border-bottom: 1px solid rgba(232, 212, 139, 0.14);
  }

  .nav-note { font-size: 0.64rem; }

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

  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-ledger { grid-column: auto; }
}

@media (max-width: 560px) {
  .brand-tagline {
    font-size: 0.62rem;
    letter-spacing: 0.08em;
  }

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

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

/* ---------- 18. 减弱动效 ---------- */
@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .figure:hover > img { transform: none; }

  .btn:hover,
  .plate--lift:hover { transform: none; }
}