/* ==========================================================================
   微赢棋牌局 · 全站共享样式 /assets/site.css
   结构：reset → 变量 → 基础排版 → 布局工具 → 内容组件 → 页头 → 页脚
        → 动效协议 → 响应式 → 无障碍偏好
   ========================================================================== */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;min-height:100%}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0}
[id]{scroll-margin-top:120px}

/* ---------- 变量 ---------- */
:root{
  /* 色板 */
  --ink:#14161A;
  --ink-soft:#1E232B;
  --porcelain:#F7F5F0;
  --paper:#E8E4DA;
  --cinnabar:#C8402F;
  --cinnabar-deep:#8E2B20;
  --gold:#C9A227;
  --gold-light:#EBD9A3;
  --celadon:#3F7A6A;
  --slate:#5B6B7C;

  /* 线 / 文字层级 */
  --line:rgba(91,107,124,.26);
  --line-strong:rgba(91,107,124,.46);
  --line-dark:rgba(91,107,124,.42);
  --grid-line:rgba(91,107,124,.10);
  --text-body:#3A4048;
  --text-muted:#6E7783;
  --on-dark:#D8D4CB;

  /* 字体 */
  --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","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace;

  /* 尺度 */
  --maxw:1180px;
  --gutter:clamp(18px,4vw,56px);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-paper:7px 7px 0 -1px var(--paper), 8px 8px 0 -1px var(--line);
}

/* ---------- 基础排版 ---------- */
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background-color:var(--porcelain);
  background-image:
    linear-gradient(to right,var(--grid-line) 1px,transparent 1px),
    linear-gradient(to bottom,var(--grid-line) 1px,transparent 1px);
  background-size:88px 88px,88px 88px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;line-height:1.32;letter-spacing:.02em;color:var(--ink)}
h1{font-size:clamp(28px,4.4vw,46px);letter-spacing:.05em}
h2{font-size:clamp(22px,3vw,32px)}
h3{font-size:clamp(18px,2.2vw,22px)}
h4{font-size:17px}
p{max-width:46em}
strong{font-weight:600}
::selection{background:var(--gold-light);color:var(--ink)}
:focus-visible{outline:2px solid var(--cinnabar);outline-offset:3px;border-radius:1px}

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

/* ---------- 布局工具 ---------- */
.canvas{width:min(100% - 2 * var(--gutter),var(--maxw));margin-inline:auto}
.section{padding-block:clamp(44px,6.5vw,92px)}
.section--paper{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--ink{position:relative;background:var(--ink);color:var(--on-dark);border-top:1px solid rgba(91,107,124,.5)}
.section--ink::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(247,245,240,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(247,245,240,.055) 1px,transparent 1px);
  background-size:72px 72px,72px 72px;
}
.section--ink > *{position:relative;z-index:1}
.section--ink h1,.section--ink h2,.section--ink h3,.section--ink h4{color:var(--porcelain)}
.section--ink .lede{color:#C6C2B9}
.section--ink .eyebrow{color:var(--gold)}

.eyebrow{
  display:block;font-family:var(--font-mono);font-size:11px;font-weight:400;
  letter-spacing:.28em;color:var(--slate);text-transform:uppercase;margin-bottom:14px;
}
.lede{font-size:clamp(16px,1.6vw,18.5px);line-height:1.85;color:var(--text-body)}
.prose p{max-width:38em;color:var(--text-body)}
.prose p + p{margin-top:1em}
.hairline{height:1px;background:var(--line);margin-block:clamp(20px,3vw,36px)}

.grid{display:grid;gap:clamp(20px,3vw,40px)}
.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(0,240px) minmax(0,1fr)}

/* ---------- 内容组件 ---------- */
.paper-card{
  position:relative;background:var(--porcelain);border:1px solid var(--line-strong);
  padding:clamp(18px,2.6vw,30px);box-shadow:var(--shadow-paper);
}
.paper-card--ink{background:var(--ink-soft);border-color:rgba(91,107,124,.5);color:var(--on-dark);box-shadow:none}
.paper-card--ink h3,.paper-card--ink h4{color:var(--porcelain)}

.media-frame{
  position:relative;overflow:hidden;aspect-ratio:16 / 9;border:1px solid var(--line-strong);
  background:linear-gradient(145deg,#14161A 0%,#1E232B 48%,rgba(63,122,106,.72) 100%);
}
.media-frame > img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(247,245,240,.10) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(247,245,240,.10) 1px,transparent 1px);
  background-size:33.333% 33.333%,33.333% 33.333%;
}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--portrait{aspect-ratio:3 / 4}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame__caption{margin-top:10px;font-size:12.5px;letter-spacing:.04em;color:var(--text-muted)}

.tag{
  display:inline-flex;align-items:center;gap:6px;padding:3px 10px;font-size:12px;
  letter-spacing:.08em;border:1px solid var(--line-strong);background:var(--paper);color:var(--ink-soft);
}
.tag--cinnabar{border-color:var(--cinnabar);background:#FBEDEA;color:var(--cinnabar-deep)}
.tag--gold{border-color:var(--gold);background:var(--gold-light);color:#6B5410}
.tag--celadon{border-color:var(--celadon);background:#E7F0EC;color:#2C5A4C}

.status{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--celadon);letter-spacing:.04em}
.status::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor;box-shadow:0 0 0 3px rgba(63,122,106,.16)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border:1px solid var(--ink);background:transparent;color:var(--ink);
  font-size:15px;letter-spacing:.06em;cursor:pointer;border-radius:var(--radius);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}
.btn--primary:hover{background:var(--cinnabar-deep);border-color:var(--cinnabar-deep)}
.btn--ghost:hover{border-color:var(--cinnabar);color:var(--cinnabar-deep)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:#2A2205}
.btn--gold:hover{background:var(--gold-light);border-color:var(--gold)}
.btn--ghost-dark{background:transparent;border-color:rgba(235,217,163,.45);color:var(--gold-light)}
.btn--ghost-dark:hover{border-color:var(--gold);background:rgba(201,162,39,.14);color:#fff}

.breadcrumbs{font-size:13px;color:var(--text-muted);letter-spacing:.04em}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumbs li{display:flex;align-items:center;gap:6px}
.breadcrumbs li + li::before{content:"/";color:var(--line-strong)}
.breadcrumbs a:hover{color:var(--cinnabar-deep)}
.breadcrumbs [aria-current="page"]{color:var(--ink)}

.clauses{counter-reset:clause}
.clause{position:relative;padding:18px 0 18px clamp(46px,6vw,72px);border-top:1px solid var(--line)}
.clause__no{
  position:absolute;left:0;top:19px;font-family:var(--font-mono);font-size:12.5px;
  letter-spacing:.08em;color:var(--gold);
}
.clause__title{font-family:var(--font-serif);font-size:17px;font-weight:600;margin-bottom:6px}
.clause__body{color:var(--text-body);max-width:38em}
.section--ink .clause{border-color:rgba(91,107,124,.42)}
.section--ink .clause__title{color:var(--porcelain)}
.section--ink .clause__body{color:#B9B5AC}

.disclosure{border-top:1px solid var(--line)}
.disclosure summary{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:16px 0;cursor:pointer;font-weight:600;list-style:none;
}
.disclosure summary::-webkit-details-marker{display:none}
.disclosure summary::after{
  content:"＋";font-family:var(--font-mono);color:var(--gold);flex:0 0 auto;line-height:1.5;
}
.disclosure[open] summary::after{content:"－"}
.disclosure__body{padding-bottom:18px;color:var(--text-body);max-width:38em}
.section--ink .disclosure{border-color:rgba(91,107,124,.42)}

/* ---------- 页头 ---------- */
.skip-link{
  position:absolute;left:50%;top:-70px;transform:translateX(-50%);z-index:120;
  padding:10px 22px;background:var(--ink);color:var(--porcelain);font-size:14px;
  letter-spacing:.1em;transition:top .18s var(--ease);
}
.skip-link:focus{top:10px}

.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,240,.96);
  border-bottom:1px solid var(--line);
  box-shadow:0 18px 34px -32px rgba(20,22,26,.95);
}

.header-rail{
  display:flex;align-items:center;gap:14px;padding:7px var(--gutter);
  border-bottom:1px solid var(--line);
  font-size:10px;letter-spacing:.2em;color:var(--slate);line-height:1.4;
}
.header-rail__item{flex:0 0 auto;white-space:nowrap}
.header-rail__rule{
  flex:1 1 auto;height:1px;
  background-image:linear-gradient(to right,var(--line-strong) 0 6px,transparent 6px 12px);
  background-size:12px 1px;background-repeat:repeat-x;
}

.masthead{
  position:relative;
  display:grid;grid-template-columns:1fr auto 1fr;
  grid-template-areas:"metaL brand metaR";
  align-items:center;gap:14px;
  width:min(100% - 2 * var(--gutter),var(--maxw));
  margin-inline:auto;padding-block:13px;
  transition:padding .2s var(--ease);
}
.masthead__meta{margin:0;display:flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;color:var(--slate)}
.masthead__meta--left{grid-area:metaL;justify-self:start}
.masthead__meta--right{grid-area:metaR;justify-self:end;transition:opacity .2s var(--ease),visibility .2s var(--ease)}
.masthead__label{font-size:11px;letter-spacing:.22em}
.masthead__version{color:var(--gold);font-size:13px}
.masthead__quick{
  display:inline-block;padding:5px 13px;border:1px solid var(--line-strong);
  font-size:12.5px;letter-spacing:.14em;color:var(--ink);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.masthead__quick:hover{border-color:var(--cinnabar);color:var(--cinnabar-deep);background:#FBEDEA}

.brand{grid-area:brand;justify-self:center;display:inline-flex;align-items:center;gap:11px}
.brand__mark{
  flex:0 0 auto;width:19px;height:19px;background-color:var(--ink);
  background-image:
    linear-gradient(45deg,var(--porcelain) 25%,transparent 25%,transparent 75%,var(--porcelain) 75%),
    linear-gradient(45deg,var(--porcelain) 25%,transparent 25%,transparent 75%,var(--porcelain) 75%);
  background-size:9px 9px,9px 9px;background-position:0 0,4.5px 4.5px;
}
.brand__word{display:flex;flex-direction:column;line-height:1.15}
.brand__name{
  font-family:var(--font-serif);font-weight:700;
  font-size:clamp(21px,2.9vw,30px);letter-spacing:.16em;color:var(--ink);
  transition:font-size .2s var(--ease);
}
.brand__latin{font-size:9px;letter-spacing:.42em;color:var(--slate);transition:opacity .2s var(--ease)}
.brand:hover .brand__name{color:var(--cinnabar-deep)}

.nav-toggle{
  display:none;grid-area:toggle;justify-self:end;align-items:center;gap:9px;
  padding:8px 13px;border:1px solid var(--line-strong);background:transparent;
  font-size:13px;letter-spacing:.14em;color:var(--ink);cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle__bars{position:relative;width:16px;height:12px;flex:0 0 auto}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:1.5px;background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle__bars::before{top:1px}
.nav-toggle__bars::after{bottom:1px}
.nav-toggle[aria-expanded="true"]{border-color:var(--cinnabar);color:var(--cinnabar-deep)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

.site-nav{border-top:1px solid var(--line)}
.site-nav__list{
  display:flex;justify-content:center;flex-wrap:wrap;
  width:min(100% - 2 * var(--gutter),var(--maxw));margin-inline:auto;
}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:9px;
  padding:12px clamp(10px,2vw,26px);
  font-size:15px;letter-spacing:.1em;color:var(--ink);
  border-left:1px solid var(--line);
  transition:color .18s var(--ease);
}
.site-nav__list > li:first-child .site-nav__link{border-left:0}
.site-nav__index{font-size:10.5px;color:var(--slate);transition:color .18s var(--ease)}
.site-nav__link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:6px;height:2px;background:var(--cinnabar);
  transition:left .2s var(--ease),right .2s var(--ease);
}
.site-nav__link:hover{color:var(--cinnabar-deep)}
.site-nav__link:hover::after{left:clamp(10px,2vw,26px);right:clamp(10px,2vw,26px)}
.site-nav__link[aria-current="page"]{color:var(--cinnabar-deep)}
.site-nav__link[aria-current="page"]::after{left:clamp(10px,2vw,26px);right:clamp(10px,2vw,26px);background:var(--cinnabar)}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--cinnabar)}

.header-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.header-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--gold) 0%,var(--cinnabar) 100%);
}

/* 刊头收拢形态（JS 在滚动后加 data-compact） */
.site-header[data-compact] .header-rail{display:none}
.site-header[data-compact] .masthead{padding-block:7px}
.site-header[data-compact] .masthead__meta--right{opacity:0;visibility:hidden}
.site-header[data-compact] .masthead__meta--left{opacity:.75}
.site-header[data-compact] .brand__name{font-size:clamp(18px,2.2vw,23px)}
.site-header[data-compact] .brand__latin{opacity:0}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(72px,10vw,140px);
  background:var(--ink);color:var(--on-dark);
  padding-bottom:34px;
}
.site-footer::before,
.site-footer::after{
  content:"";position:absolute;border:1px solid rgba(91,107,124,.32);border-bottom:0;
}
.site-footer::before{left:5%;right:5%;top:-16px;height:16px;background:#1B2029;border-radius:4px 4px 0 0}
.site-footer::after{left:11%;right:11%;top:-30px;height:14px;background:#222833;border-color:rgba(91,107,124,.18);border-radius:4px 4px 0 0}

.footer-notice{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;
  width:min(100% - 2 * var(--gutter),var(--maxw));margin-inline:auto;
  padding:24px 0;border-bottom:1px solid var(--line-dark);
}
.footer-notice__mark{
  font-size:11px;letter-spacing:.24em;color:var(--gold);
  border:1px solid rgba(201,162,39,.5);padding:3px 10px;flex:0 0 auto;
}
.footer-notice__text{flex:1 1 300px;max-width:52em;margin:0;font-size:14px;line-height:1.75;color:#B9B5AC}
.footer-notice__cta{flex:0 0 auto}

.footer-ledger{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:clamp(24px,4vw,56px);
  width:min(100% - 2 * var(--gutter),var(--maxw));margin-inline:auto;
  padding:clamp(32px,5vw,56px) 0 28px;
}
.footer-col__title{
  display:flex;align-items:baseline;gap:10px;
  font-size:12px;letter-spacing:.24em;color:var(--gold);
  padding-bottom:10px;margin-bottom:18px;border-bottom:1px solid var(--line-dark);
}
.footer-col__title .mono{font-size:11px;letter-spacing:.1em;color:rgba(201,162,39,.62)}
.footer-col--brand{display:flex;flex-direction:column;gap:10px}
.footer-brand{font-family:var(--font-serif);font-size:clamp(20px,2.4vw,26px);font-weight:700;letter-spacing:.16em;color:var(--porcelain);margin:0}
.footer-motto{font-size:14px;letter-spacing:.14em;color:var(--gold-light);margin:0}
.footer-note{font-size:12px;letter-spacing:.1em;color:var(--slate);margin:0}
.footer-links{display:grid;gap:11px}
.footer-links a{
  font-size:14.5px;letter-spacing:.06em;color:var(--on-dark);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-links a:hover{color:var(--gold-light);border-bottom-color:rgba(235,217,163,.55)}
.footer-contact{display:grid;gap:13px}
.footer-contact__k{display:block;font-size:11px;letter-spacing:.22em;color:var(--slate)}
.footer-contact__v{display:block;font-size:14px;line-height:1.7;color:#E4E0D7;word-break:break-word}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  width:min(100% - 2 * var(--gutter),var(--maxw));margin-inline:auto;
  padding-top:18px;border-top:1px solid var(--line-dark);
  font-size:12.5px;letter-spacing:.08em;color:var(--slate);
}
.footer-base__legal{color:var(--slate);margin:0}
.footer-base__meta{margin:0}

/* ---------- 动效协议 ---------- */
.has-js [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .24s ease-out,transform .24s ease-out;
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}
@keyframes nav-drop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .footer-ledger{grid-template-columns:1.4fr 1fr 1fr;row-gap:36px}
  .footer-col:last-child{grid-column:1 / -1}
}
@media (max-width:980px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--aside{grid-template-columns:1fr}
}
@media (max-width:880px){
  .header-rail{font-size:9px;letter-spacing:.14em;padding-block:6px}
  .masthead{grid-template-columns:1fr auto;grid-template-areas:"brand toggle";padding-block:11px}
  .masthead__meta{display:none}
  .brand{justify-self:start}
  .nav-toggle{display:inline-flex}
  .site-nav{display:none;max-height:74vh;overflow-y:auto;background:var(--porcelain)}
  .site-nav[data-open]{display:block;animation:nav-drop .22s var(--ease) both}
  .site-nav__list{flex-direction:column;width:100%;padding:2px var(--gutter) 16px}
  .site-nav__link{
    width:100%;border-left:0;border-top:1px solid var(--line);
    padding:13px 2px;justify-content:flex-start;gap:14px;
  }
  .site-nav__list > li:first-child .site-nav__link{border-top:0}
  .site-nav__link::after{display:none}
  .site-nav__index{width:26px;flex:0 0 auto}
  .site-nav__link[aria-current="page"]{
    color:var(--cinnabar-deep);border-left:3px solid var(--cinnabar);padding-left:12px;
  }
  .site-nav__link[aria-current="page"] .site-nav__index{color:var(--cinnabar)}
  .footer-notice{padding:20px 0}
  .footer-notice__cta{margin-left:0}
  .footer-ledger{grid-template-columns:1fr 1fr}
  .footer-col--brand{grid-column:1 / -1}
  .footer-col:last-child{grid-column:1 / -1}
  .footer-base{justify-content:flex-start}
}
@media (max-width:640px){
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer-ledger{grid-template-columns:1fr}
  .clause{padding-left:44px}
}

/* ---------- 无障碍与动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .has-js [data-reveal]{opacity:1;transform:none}
  .skip-link{transition:none}
}