/* =========================================================
   家乐棋牌局 · 帮助中心  共享样式  /assets/site.css
   牌桌墨绿 + 象牙白 + 筹码红 + 暖金 / 粗野主义框景系统
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,figure,blockquote,dl,dd,details,p,pre,h1,h2,h3,h4{margin:0}
:where(ul,ol){margin:0;padding:0}
img,picture,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}
summary{cursor:pointer}

/* ---------- 2. 变量 ---------- */
:root{
  --felt:#0E2E26;
  --felt-2:#14382E;
  --felt-line:#1F4A3D;
  --ivory:#F4EFE3;
  --ivory-soft:#E8E0CF;
  --chip:#C0342B;
  --gold:#D8A24A;
  --score:#6B6558;
  --paper-line:#C9BFA8;
  --status:#2F7D5B;
  --status-on-dark:#6FC79E;
  --lamp:#FFF9EC;
  --ink:#17170F;

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

  --shadow-hard:6px 6px 0 rgba(14,46,38,.9);
  --shadow-hard-dark:6px 6px 0 rgba(0,0,0,.35);
  --radius:4px;
  --wrap:1320px;
  --gutter:clamp(16px,3.2vw,44px);
  --space-block:clamp(64px,9vw,140px);
}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  background:var(--ivory);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:clamp(15.5px,.5vw + 14px,17px);
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--gold);color:var(--felt)}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:2px}
#main-content:focus{outline:none}

.display{font-weight:300;font-size:clamp(2.6rem,6vw,5.5rem);letter-spacing:.06em;line-height:1.05}
.heading-lg{font-weight:600;font-size:clamp(1.35rem,2.2vw,1.9rem);letter-spacing:.02em;line-height:1.35}
.index-label{display:inline-flex;align-items:baseline;gap:.35em;font-size:.78rem;font-weight:500;letter-spacing:.18em;color:var(--score)}
.index-label::before{content:"[";color:var(--gold)}
.index-label::after{content:"]";color:var(--gold)}
.index-label--light{color:#9DBBAE}
.lede{font-size:clamp(1.02rem,1.3vw,1.16rem);line-height:1.9;color:var(--score);max-width:38em}
.prose{max-width:36em;line-height:1.9}
.prose p + p{margin-top:1.1em}
.prose h3{font-weight:600;font-size:1.12rem;margin:1.8em 0 .6em;letter-spacing:.02em}
.prose ul{list-style:disc;padding-left:1.5em;margin:.9em 0}
.prose ol{list-style:decimal;padding-left:1.6em;margin:.9em 0}
.prose li + li{margin-top:.45em}
.prose blockquote{border-left:3px solid var(--gold);padding-left:16px;font-family:var(--font-serif);color:var(--score);margin:1.2em 0}
.num{font-family:var(--font-mono);font-size:1.15em;letter-spacing:.04em;color:var(--gold);font-variant-numeric:tabular-nums}
.num--chip{color:var(--chip)}
.muted{color:var(--score);font-size:.88rem}

/* ---------- 4. 容器与分区 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--space-block)}
.section--tight{padding-block:clamp(40px,6vw,88px)}
.zone-dark{background:var(--felt);color:var(--lamp)}
.zone-soft{background:var(--ivory-soft)}
.zone-paper{background:var(--ivory)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px 32px;padding-bottom:18px;margin-bottom:clamp(28px,4vw,56px);border-bottom:1px solid var(--paper-line)}
.section-title{font-weight:600;font-size:clamp(1.35rem,2.4vw,1.9rem);letter-spacing:.02em;line-height:1.3}

/* ---------- 5. 网格与错落 ---------- */
.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--asym{grid-template-columns:minmax(0,.62fr) minmax(0,1fr)}
.grid--asym-flip{grid-template-columns:minmax(0,1fr) minmax(0,.62fr)}
.stagger > *:nth-child(3n+2){margin-top:clamp(12px,2vw,28px)}
.stagger > *:nth-child(3n+3){margin-top:clamp(6px,1vw,14px)}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--asym,.grid--asym-flip{grid-template-columns:minmax(0,1fr)}
  .stagger > *{margin-top:0}
}

/* ---------- 6. 框景、刻度、筹码 ---------- */
.frame{border:2px solid var(--felt);border-radius:var(--radius);background:var(--ivory);box-shadow:var(--shadow-hard);overflow:hidden}
.frame--dark{border-color:var(--felt-line);background:var(--felt-2);color:var(--lamp);box-shadow:var(--shadow-hard-dark)}
.frame-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 18px;padding:13px 20px;border-bottom:1px solid var(--paper-line)}
.frame--dark .frame-head{border-bottom-color:var(--felt-line)}
.frame-body{padding:clamp(18px,2.6vw,32px)}
.ticks{height:10px;background-image:repeating-linear-gradient(to right,var(--paper-line) 0 1px,transparent 1px 22px);border-bottom:1px solid var(--paper-line)}
.frame--dark .ticks{background-image:repeating-linear-gradient(to right,var(--felt-line) 0 1px,transparent 1px 22px);border-bottom-color:var(--felt-line)}
.rule-score{background-image:repeating-linear-gradient(to bottom,transparent 0 27px,var(--paper-line) 27px 28px)}
.chip-dot{display:inline-block;flex:none;width:10px;height:10px;border-radius:50%;background:var(--chip);box-shadow:0 0 0 2px rgba(192,52,43,.22)}
.chip-dot--gold{background:var(--gold);box-shadow:0 0 0 2px rgba(216,162,74,.25)}
.chip-dot--ok{background:var(--status);box-shadow:0 0 0 2px rgba(47,125,91,.22)}

/* ---------- 7. 按钮与状态 ---------- */
.btn{display:inline-flex;align-items:center;gap:.55em;padding:12px 22px;border:2px solid var(--felt);border-radius:var(--radius);background:var(--ivory);color:var(--felt);font-size:.9rem;font-weight:600;letter-spacing:.06em;box-shadow:var(--shadow-hard);transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}
.btn:hover{transform:translate(3px,3px);box-shadow:3px 3px 0 rgba(14,46,38,.9)}
.btn--primary{background:var(--chip);border-color:var(--chip);color:var(--lamp)}
.btn--ghost{background:transparent;border-color:var(--felt-line);color:var(--lamp);box-shadow:4px 4px 0 rgba(0,0,0,.3)}
.btn--ghost:hover{box-shadow:2px 2px 0 rgba(0,0,0,.3);background:var(--felt-2)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border:1px solid var(--paper-line);border-radius:var(--radius);background:var(--ivory-soft);color:var(--score);font-size:.72rem;letter-spacing:.14em}
.badge--ok{border-color:var(--status);color:var(--status);background:rgba(47,125,91,.08)}
.badge--warn{border-color:var(--chip);color:var(--chip);background:rgba(192,52,43,.08)}

/* ---------- 8. 图片容器（页面阶段放图） ---------- */
.img-frame{position:relative;margin:0;border:2px solid var(--felt);border-radius:var(--radius);background:var(--ivory-soft);box-shadow:var(--shadow-hard);overflow:hidden}
.img-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:16 / 10}
.img-frame--tall img{aspect-ratio:3 / 4}
.img-frame--wide img{aspect-ratio:21 / 9}
.img-frame--square img{aspect-ratio:1 / 1}
.img-frame--dark{border-color:var(--felt-line);box-shadow:var(--shadow-hard-dark)}
.img-frame figcaption{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 14px;padding:10px 14px;border-top:1px solid var(--paper-line);background:var(--ivory);color:var(--score);font-size:.78rem;letter-spacing:.12em}
.img-tag{position:absolute;top:12px;left:12px;padding:4px 10px;border:1px solid var(--felt);border-radius:var(--radius);background:var(--lamp);color:var(--felt);font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em}

/* ---------- 9. 表格（结算示例） ---------- */
.data-table{width:100%;border:2px solid var(--felt);background:var(--ivory);font-size:.94rem}
.data-table caption{padding:0 0 12px;color:var(--score);font-size:.82rem;letter-spacing:.12em;text-align:left}
.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--paper-line);text-align:left;vertical-align:top}
.data-table thead th{background:var(--felt);color:var(--lamp);border-bottom:2px solid var(--felt-line);font-weight:600;letter-spacing:.06em;white-space:nowrap}
.data-table tbody tr:nth-child(even){background:var(--ivory-soft)}
.data-table tfoot td{border-top:2px solid var(--felt);border-bottom:0;font-weight:600}

/* ---------- 10. 折叠面板 ---------- */
.fold{border:2px solid var(--felt);border-radius:var(--radius);background:var(--ivory);box-shadow:4px 4px 0 var(--paper-line);overflow:hidden}
.fold + .fold{margin-top:14px}
.fold summary{display:flex;align-items:center;gap:12px;padding:14px 18px;font-weight:600;font-size:.98rem;letter-spacing:.02em;list-style:none}
.fold summary::-webkit-details-marker{display:none}
.fold summary::before{content:"+";flex:none;font-family:var(--font-mono);font-size:1.05rem;line-height:1;color:var(--chip)}
.fold[open] summary::before{content:"–"}
.fold[open] summary{border-bottom:1px solid var(--paper-line);background:var(--ivory-soft)}
.fold-body{padding:16px 18px 20px;line-height:1.9}
.fold-body > * + *{margin-top:.8em}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{padding-block:clamp(16px,2.4vw,28px)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb-item{display:flex;align-items:center;gap:8px;font-size:.78rem;letter-spacing:.14em;color:var(--score)}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--paper-line)}
.breadcrumb-link{border-bottom:1px solid transparent;transition:border-color .18s ease,color .18s ease}
.breadcrumb-link:hover{color:var(--ink);border-bottom-color:var(--gold)}

/* ---------- 12. 共享头部 ---------- */
.skip-link{position:absolute;left:12px;top:-70px;z-index:200;padding:10px 18px;border:2px solid var(--felt);border-radius:var(--radius);background:var(--lamp);color:var(--felt);font-size:.85rem;letter-spacing:.06em;transition:top .2s ease}
.skip-link:focus{top:10px}

.site-header{position:sticky;top:0;z-index:80;background:var(--felt);color:var(--lamp);border-bottom:1px solid var(--felt-line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:var(--wrap);margin-inline:auto;padding:14px var(--gutter)}
.brand-cluster{display:flex;align-items:center;gap:clamp(12px,2vw,26px);min-width:0;order:1}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand-mark{display:grid;place-items:center;flex:none;width:38px;height:38px;border:2px solid var(--gold);border-radius:var(--radius);color:var(--gold);font-family:var(--font-mono);font-size:15px;line-height:1}
.brand-text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
.brand-name{font-size:1.05rem;font-weight:600;letter-spacing:.09em;color:var(--lamp);white-space:nowrap}
.brand-sub{margin-top:5px;font-size:.68rem;letter-spacing:.24em;color:#9DBBAE}
.quick-link{padding-bottom:2px;border-bottom:1px dashed var(--gold);color:var(--gold);font-size:.78rem;letter-spacing:.12em;white-space:nowrap;transition:color .18s ease,border-color .18s ease}
.quick-link:hover{color:var(--lamp);border-bottom-color:var(--lamp)}

.site-nav{order:2}
.nav-list{display:flex;align-items:center;gap:6px;list-style:none}
.nav-link{display:block;padding:9px 13px;border:1px solid transparent;border-radius:var(--radius);color:#CFE3D8;font-size:.86rem;letter-spacing:.05em;white-space:nowrap;transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease}
.nav-link:hover{background:var(--felt-2);border-color:var(--felt-line);color:var(--lamp);transform:translateY(-2px)}
.nav-link[aria-current="page"]{background:var(--chip);border-color:var(--chip);color:var(--lamp);box-shadow:3px 3px 0 rgba(0,0,0,.35)}

.nav-toggle{display:none;order:3;align-items:center;gap:8px;padding:9px 14px;border:1px solid var(--felt-line);border-radius:var(--radius);color:var(--lamp);font-size:.78rem;letter-spacing:.16em;background:transparent;transition:background-color .18s ease,border-color .18s ease}
.nav-toggle:hover{background:var(--felt-2)}
.nav-toggle[data-open]{background:var(--chip);border-color:var(--chip);color:var(--lamp)}

.header-rail{position:relative;height:4px;background-color:var(--felt-2);background-image:repeating-linear-gradient(to right,var(--felt-line) 0 1px,transparent 1px 28px);border-top:1px solid var(--felt-line);overflow:hidden}
.rail-progress{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--gold),var(--chip));transition:width .12s linear}

/* ---------- 13. 共享页脚 ---------- */
.site-footer{margin-top:var(--space-block);background:var(--felt);color:#CFE3D8;border-top:2px solid var(--felt-line)}
.footer-inner{display:grid;gap:clamp(28px,4vw,52px);max-width:var(--wrap);margin-inline:auto;padding:clamp(52px,7vw,104px) var(--gutter) 32px}
.footer-top{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.5fr);gap:clamp(28px,5vw,72px)}
.footer-lead{min-width:0}
.footer-brand{display:inline-block;padding-bottom:6px;border-bottom:2px solid var(--gold);color:var(--lamp);font-size:1.35rem;font-weight:600;letter-spacing:.1em}
.footer-slogan{max-width:22em;margin-top:18px;font-family:var(--font-serif);font-size:.98rem;line-height:1.9;color:#A9C4B7}
.footer-meta{display:flex;align-items:center;gap:9px;margin-top:20px;color:#8FAFA1;font-size:.76rem;letter-spacing:.16em}
.footer-nav{display:flex;flex-wrap:wrap;align-items:flex-start;gap:clamp(24px,4vw,56px)}
.footer-col{flex:1 1 128px;min-width:118px;padding-top:14px;border-top:2px solid var(--felt-line)}
.footer-col-title{display:flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--gold);font-size:.74rem;letter-spacing:.2em}
.footer-col-title::before{content:"";flex:none;width:18px;height:3px;background:var(--chip)}
.footer-links{display:grid;gap:10px;list-style:none}
.footer-link{display:inline-block;padding-bottom:2px;border-bottom:1px solid transparent;color:#CFE3D8;font-size:.9rem;transition:color .18s ease,border-color .18s ease,transform .18s ease}
.footer-link:hover{color:var(--lamp);border-bottom-color:var(--gold);transform:translateX(2px)}

.contact-block{display:grid;gap:14px;padding:clamp(20px,3vw,32px);border:2px solid var(--felt-line);border-radius:var(--radius);background:var(--felt-2);box-shadow:var(--shadow-hard-dark)}
.contact-row{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 16px}
.contact-label{min-width:62px;color:var(--gold);font-size:.72rem;letter-spacing:.18em}
.contact-value{color:var(--lamp);font-family:var(--font-mono);font-size:.95rem;letter-spacing:.02em;word-break:break-word}
.contact-value--addr{font-family:var(--font-sans);font-size:.92rem;line-height:1.7}
.copy-btn{padding:4px 12px;border:1px solid var(--felt-line);border-radius:var(--radius);background:transparent;color:#CFE3D8;font-size:.74rem;letter-spacing:.12em;transition:background-color .18s ease,border-color .18s ease,color .18s ease}
.copy-btn:hover{background:var(--felt);border-color:var(--gold);color:var(--lamp)}
.copy-status{min-height:1em;color:var(--status-on-dark);font-size:.76rem;letter-spacing:.1em}
.contact-note{max-width:64ch;color:#A9C4B7;font-size:.84rem;line-height:1.8}

.legal-line{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;padding-top:20px;border-top:1px solid var(--felt-line);color:#8FAFA1;font-size:.78rem;letter-spacing:.08em}

/* ---------- 14. 滚动显现 ---------- */
.has-js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .28s ease-out,transform .28s ease-out}
.has-js [data-reveal].is-in{opacity:1;transform:translateY(0)}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1100px){
  .nav-link{padding:8px 10px;font-size:.82rem}
}
@media (max-width:960px){
  .header-inner{flex-wrap:wrap;gap:12px;padding:12px var(--gutter)}
  .brand-cluster{flex:1 1 auto}
  .nav-toggle{display:inline-flex}
  .site-nav{flex:1 0 100%;order:4;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .site-nav::-webkit-scrollbar{display:none}
  .nav-list{flex-wrap:nowrap;gap:8px;padding-bottom:4px}
  .nav-link{border-color:var(--felt-line);background:var(--felt-2);color:#DCEAE1}
  .site-nav[data-open]{overflow:visible}
  .site-nav[data-open] .nav-list{flex-wrap:wrap;flex-direction:column;align-items:stretch;gap:6px;padding:12px 0 6px}
  .site-nav[data-open] .nav-link{white-space:normal;background:transparent}
  .site-nav[data-open] .nav-link[aria-current="page"]{background:var(--chip);border-color:var(--chip)}
  .footer-top{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .quick-link{display:none}
  .brand-mark{width:34px;height:34px;font-size:14px}
  .brand-sub{letter-spacing:.18em}
  .contact-row{align-items:center}
  .contact-value{font-size:.9rem}
  .legal-line{flex-direction:column;gap:6px}
  .display{letter-spacing:.04em}
  .data-table{font-size:.86rem}
  .data-table th,.data-table td{padding:10px 10px}
}

/* ---------- 16. 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}
  .has-js [data-reveal]{opacity:1;transform:none}
  .nav-link:hover,.footer-link:hover,.btn:hover{transform:none}
  .rail-progress{transition:none}
}