/* ============================================================
   财神捕鱼站 · 共享样式表 /assets/site.css
   深海墨底 · 鎏金章节序号 · 朱砂刻度 · 青玉状态
   ============================================================ */

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

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

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

ul, ol { list-style: none; }

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

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

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

/* ---------- 变量 ---------- */
:root {
  --deep: #04121E;
  --trench: #0A2133;
  --surf: #16394F;
  --paper: #F2F5F6;
  --mist: #A9B7C1;
  --gold: #D9A64B;
  --gold-hi: #F2CE86;
  --cinnabar: #C6402C;
  --jade: #3FBFA0;

  --w-wide: 1440px;
  --w-base: 1180px;
  --w-narrow: 760px;

  --b: 8px;
  --gutter: clamp(20px, 4vw, 56px);

  --font-head: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "STSong", "SimSun", Georgia, serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-index: "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --line: 1px solid var(--surf);
  --net: rgba(22, 57, 79, 0.9);

  --t-fast: 160ms;
  --t-base: 320ms;

  --net-shift: 0px;
}

/* ---------- 基础排版 ---------- */
body {
  background: var(--deep);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  min-height: 100%;
  overflow-x: hidden;
}

p { max-width: 68ch; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--paper);
}

h1 { font-size: clamp(40px, 6.4vw, 64px); }
h2 { font-size: clamp(30px, 4vw, 44px); }
h3 { font-size: clamp(22px, 2.4vw, 30px); }
h4 { font-size: 22px; }

strong { font-weight: 700; color: var(--gold-hi); }

::selection { background: var(--gold); color: var(--deep); }

:focus-visible {
  outline: 2px solid var(--gold-hi);
  outline-offset: 3px;
}

/* ---------- 跳转 ---------- */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--gold);
  color: var(--deep);
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.14em;
  transition: top var(--t-fast) ease-out;
}
.skip-link:focus-visible { top: 10px; }

/* ---------- 版心 ---------- */
.container-wide,
.container,
.container-narrow {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container-wide { max-width: var(--w-wide); }
.container { max-width: var(--w-base); }
.container-narrow { max-width: var(--w-narrow); }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: calc(var(--b) * 4); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-aside {
  grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
  gap: calc(var(--b) * 6);
}

/* ---------- 章节 ---------- */
.section {
  padding-block: clamp(56px, 8vw, 112px);
  border-top: var(--line);
}
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 30%);
  gap: calc(var(--b) * 4);
  align-items: end;
  margin-bottom: calc(var(--b) * 5);
}
.section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: calc(var(--b) * 1.5);
}
.section-title { margin: 0; }
.section-note {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  line-height: 1.9;
  border-left: 2px solid var(--cinnabar);
  padding-left: calc(var(--b) * 1.5);
}

/* ---------- 面板 ---------- */
.panel {
  background: var(--trench);
  border: var(--line);
  padding: calc(var(--b) * 4);
}
.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: calc(var(--b) * 2);
  padding-bottom: calc(var(--b) * 2);
  border-bottom: var(--line);
  margin-bottom: calc(var(--b) * 3);
}
.panel-body > * + * { margin-top: calc(var(--b) * 2); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border: 1px solid var(--surf);
  border-radius: 2px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
  background: transparent;
}
.tag-gold { color: var(--gold-hi); border-color: var(--gold); }
.tag-cinnabar { color: var(--cinnabar); border-color: var(--cinnabar); }
.tag-jade { color: var(--jade); border-color: var(--jade); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--b);
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 16px;
  letter-spacing: 0.06em;
  text-align: center;
  transition: color var(--t-base) ease,
              border-color var(--t-base) ease,
              background-color var(--t-base) ease;
}
.btn-solid {
  background: var(--gold);
  color: var(--deep);
  border-color: var(--gold);
}
.btn-solid:hover,
.btn-solid:focus-visible {
  background: var(--deep);
  color: var(--gold-hi);
  border-color: var(--gold-hi);
}
.btn-ghost {
  background: transparent;
  color: var(--gold);
  border-color: var(--surf);
}
.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--b);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  padding-block: calc(var(--b) * 2);
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--surf);
  margin-right: var(--b);
}
.breadcrumb-item[aria-current="page"] { color: var(--paper); }

/* ---------- 图片容器基础规则 ---------- */
.figure { margin: 0; }
.figure-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: var(--line);
  background-color: var(--trench);
  background-image:
    repeating-linear-gradient(45deg, rgba(22, 57, 79, 0.55) 0 1px, transparent 1px 12px),
    repeating-linear-gradient(-45deg, rgba(22, 57, 79, 0.55) 0 1px, transparent 1px 12px);
}
.figure-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure-frame-tall { aspect-ratio: 4 / 5; }
.figure-frame-wide { aspect-ratio: 21 / 9; }
.figure-caption {
  margin-top: calc(var(--b) * 1.5);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ---------- 表格 ---------- */
.table-scroll {
  overflow-x: auto;
  border: var(--line);
  background: var(--deep);
  scrollbar-color: var(--surf) var(--deep);
}
.data-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 16px;
}
.data-table caption {
  text-align: left;
  padding: calc(var(--b) * 2);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  border-bottom: var(--line);
}
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(22, 57, 79, 0.7);
}
.data-table thead th {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  font-weight: 400;
  color: var(--gold);
  background: var(--trench);
  white-space: nowrap;
}
.data-table tbody tr:nth-child(odd) { background: rgba(10, 33, 51, 0.55); }
.data-table .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cinnabar);
}
.data-table [data-state="active"] { color: var(--jade); }

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--t-base) ease, transform var(--t-base) ease;
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, var(--deep) 0%, rgba(4, 18, 30, 0.94) 100%);
  border-bottom: var(--line);
  transition: background-color var(--t-base) ease;
}
.site-header.is-scrolled { background: rgba(4, 18, 30, 0.985); }

.header-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: calc(var(--b) * 3);
  padding-block: calc(var(--b) * 2.5);
  transition: padding var(--t-base) ease;
}
.site-header.is-scrolled .header-inner { padding-block: calc(var(--b) * 1.5); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--b) * 1.5);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--gold);
  color: var(--gold);
  background: var(--trench);
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
}
.brand-text { display: flex; flex-direction: column; gap: 2px; }
.brand-name {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--paper);
  line-height: 1.1;
}
.brand-tag {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
  line-height: 1.4;
}

.net-grid {
  display: block;
  height: 26px;
  background-image:
    repeating-linear-gradient(45deg, var(--net) 0 1px, transparent 1px 13px),
    repeating-linear-gradient(-45deg, var(--net) 0 1px, transparent 1px 13px);
  background-size: 13px 13px;
  background-position: 0 var(--net-shift), 0 var(--net-shift);
  opacity: 0.85;
  pointer-events: none;
}

.nav-primary { justify-self: end; }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: calc(var(--b) * 2.5);
}
.nav-link {
  position: relative;
  display: inline-block;
  padding-block: 6px;
  font-family: var(--font-body);
  font-size: 15px;
  letter-spacing: 0.05em;
  color: var(--mist);
  transition: color var(--t-base) ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-base) ease;
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--gold-hi); }
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] {
  color: var(--paper);
  border-left: 2px solid var(--cinnabar);
  padding-left: 10px;
  margin-left: -12px;
}
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.utility-mail {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--t-base) ease, border-color var(--t-base) ease;
}
.utility-mail:hover,
.utility-mail:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--b);
  padding: 8px 12px;
  border: 1px solid var(--surf);
  color: var(--paper);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
}
.nav-toggle-bars { display: grid; gap: 3px; width: 18px; }
.nav-toggle-bars i {
  display: block;
  height: 1px;
  background: var(--gold);
  transition: transform var(--t-base) ease, opacity var(--t-base) ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 128px);
  border-top: var(--line);
  background: var(--deep);
  overflow: hidden;
}
.coin-field {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.16;
  background-image:
    radial-gradient(circle at 50% 50%, transparent 0 7px, var(--surf) 7px 8px, transparent 8px 11px, var(--surf) 11px 12px, transparent 12px),
    radial-gradient(circle at 50% 50%, transparent 0 7px, var(--surf) 7px 8px, transparent 8px 11px, var(--surf) 11px 12px, transparent 12px);
  background-size: 96px 96px, 96px 96px;
  background-position: 0 0, 48px 48px;
}
.footer-inner {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: calc(var(--b) * 5);
  padding-block: clamp(48px, 6vw, 80px) calc(var(--b) * 5);
}
.footer-col { min-width: 0; }

.footer-brand {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--paper);
  line-height: 1.2;
}
.footer-tag {
  margin-top: var(--b);
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.footer-cta { margin-top: calc(var(--b) * 3); }

.footer-head {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  padding-bottom: calc(var(--b) * 1.5);
  border-bottom: var(--line);
  margin-bottom: calc(var(--b) * 2);
}
.footer-links { display: grid; gap: var(--b); }
.footer-links a {
  font-size: 15px;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color var(--t-base) ease, border-color var(--t-base) ease;
}
.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--gold-hi);
  border-bottom-color: var(--gold);
}
.footer-links-inline {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: calc(var(--b) * 2);
}

.footer-note {
  font-size: 15px;
  color: var(--mist);
  line-height: 1.8;
}

.footer-contact {
  display: grid;
  gap: calc(var(--b) * 1.5);
  font-size: 15px;
  color: var(--mist);
}
.footer-contact a {
  color: var(--gold);
  border-bottom: 1px solid transparent;
  transition: color var(--t-base) ease, border-color var(--t-base) ease;
}
.footer-contact a:hover,
.footer-contact a:focus-visible {
  color: var(--gold-hi);
  border-bottom-color: var(--gold);
}

.footer-base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--b) * 2);
  padding-block: calc(var(--b) * 3);
  border-top: var(--line);
}
.footer-legal a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color var(--t-base) ease, border-color var(--t-base) ease;
}
.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}
.footer-copy {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* ---------- 返回顶部 · 铜钱纹进度环 ---------- */
.to-top {
  position: fixed;
  right: clamp(16px, 3vw, 32px);
  bottom: clamp(16px, 3vw, 32px);
  z-index: 120;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  background: var(--deep);
  border: 1px solid var(--surf);
  color: var(--gold);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base) ease,
              border-color var(--t-base) ease,
              color var(--t-base) ease;
}
.to-top.is-visible { opacity: 1; pointer-events: auto; }
.to-top:hover,
.to-top:focus-visible { border-color: var(--gold); color: var(--gold-hi); }
.to-top-ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.to-top-ring circle {
  fill: none;
  stroke: var(--gold);
  stroke-width: 2;
  stroke-linecap: butt;
  transition: stroke-dashoffset 120ms linear;
}
.to-top-label {
  position: relative;
  z-index: 1;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
}

/* ---------- 排印工具类 ---------- */
.prose > * + * { margin-top: calc(var(--b) * 2.5); }
.prose h2 { margin-top: calc(var(--b) * 5); }
.prose h3 { margin-top: calc(var(--b) * 4); }
.prose ul,
.prose ol {
  display: grid;
  gap: calc(var(--b) * 1.5);
  padding-left: 1.2em;
}
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li::marker { color: var(--gold); }

.numeric {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.cinnabar { color: var(--cinnabar); }
.gold { color: var(--gold); }
.jade { color: var(--jade); }
.mist { color: var(--mist); }
.index-text {
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .header-inner {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas:
      "brand mail nav"
      "net net net";
    row-gap: var(--b);
  }
  .brand { grid-area: brand; }
  .utility-mail { grid-area: mail; justify-self: end; }
  .nav-primary { grid-area: nav; }
  .net-grid { grid-area: net; height: 18px; }
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  body { font-size: 17px; }
  .grid-2,
  .grid-3,
  .grid-aside { grid-template-columns: minmax(0, 1fr); }
  .section-head {
    grid-template-columns: minmax(0, 1fr);
    gap: calc(var(--b) * 2);
  }
  .section-note {
    border-left: 0;
    border-top: 2px solid var(--cinnabar);
    padding-left: 0;
    padding-top: var(--b);
  }

  .utility-mail { display: none; }
  .header-inner {
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-areas:
      "brand nav"
      "net net";
  }

  .nav-toggle { display: inline-flex; }
  .nav-primary { position: relative; justify-self: end; }

  .nav-list {
    position: absolute;
    right: 0;
    top: calc(100% + 12px);
    width: min(320px, calc(100vw - 2 * var(--gutter)));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: calc(var(--b) * 2);
    background: var(--trench);
    border: var(--line);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    display: none;
  }
  .nav-list[data-open] { display: flex; }
  .nav-link {
    display: block;
    padding-block: 12px;
    font-size: 16px;
    border-bottom: 1px solid rgba(22, 57, 79, 0.6);
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    margin-left: 0;
    padding-left: 12px;
    border-left: 2px solid var(--cinnabar);
    color: var(--gold-hi);
  }
}

@media (max-width: 640px) {
  .brand-mark { width: 38px; height: 38px; font-size: 19px; }
  .brand-name { font-size: 19px; }
  .brand-tag { font-size: 10px; letter-spacing: 0.12em; }
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: calc(var(--b) * 4);
  }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .panel { padding: calc(var(--b) * 2.5); }
  .btn { width: 100%; }
  .to-top { width: 48px; height: 48px; }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .net-grid { background-position: 0 0, 0 0; }
  .to-top-ring circle { transition: none; }
}