/* ==========================================================================
   好运28中心 · 共享样式表 /assets/site.css
   展览画册式布局｜侧边轨道导航｜墨蓝 × 电光青 × 暖金
   ========================================================================== */

/* ---------- 1. RESET ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,picture{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 变量 ---------- */
:root{
  --ink-900:#0B1A2B;
  --ink-700:#14304A;
  --cyan-500:#12C8D6;
  --cyan-300:#6FE3EC;
  --gold-500:#D8A03C;
  --gold-200:#F0D9A6;
  --amber-500:#C97B2E;
  --rose-500:#B85C6E;
  --paper-100:#F6F1E7;
  --paper-0:#FDFBF6;
  --slate-600:#4A5A6A;
  --char-800:#22262B;

  --line-soft:rgba(11,26,43,.12);
  --line-cyan:rgba(18,200,214,.36);
  --line-cream:rgba(246,241,231,.16);

  --font-title:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Roboto Mono",Consolas,"Courier New",monospace;

  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
  --radius-pill:999px;

  --rail-w:268px;
  --topbar-h:64px;
  --shadow-soft:0 24px 60px -42px rgba(11,26,43,.6);
  --ease:cubic-bezier(.22,.68,.32,1);
}

/* ---------- 3. 基础与纸感底纹 ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--char-800);
  background-color:var(--paper-100);
  padding-top:var(--topbar-h);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(112deg, rgba(18,200,214,.07) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(24deg, rgba(11,26,43,.05) 0 1px, transparent 1px 152px);
  opacity:.85;
}
main,.site-footer{position:relative;z-index:1}

h1,h2,h3,h4{font-family:var(--font-title);font-weight:900;letter-spacing:-.02em;line-height:1.22;color:var(--char-800)}
h1{font-size:clamp(34px,6vw,44px)}
h2{font-size:clamp(26px,4.4vw,34px)}
h3{font-size:clamp(20px,3vw,26px)}
h4{font-size:20px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

:focus-visible{outline:2px solid var(--cyan-500);outline-offset:3px;border-radius:6px}

/* ---------- 4. 跳转条 ---------- */
.skip-link{
  position:fixed;left:14px;top:-72px;z-index:140;
  padding:11px 20px;border-radius:var(--radius-pill);
  background:var(--gold-500);color:#20160A;font-weight:700;font-size:15px;
  box-shadow:0 12px 30px -12px rgba(11,26,43,.6);
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 5. 头部 / 侧边轨道 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 14px;
  background:var(--ink-900);
  color:var(--paper-0);
  border-bottom:1px solid rgba(111,227,236,.22);
}
.rail-brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  position:relative;flex:0 0 auto;width:36px;height:36px;border-radius:13px;
  overflow:hidden;background:linear-gradient(140deg,var(--cyan-500),var(--ink-700) 72%);
  box-shadow:0 0 0 1px rgba(111,227,236,.4),0 8px 20px -10px rgba(18,200,214,.75);
}
.brand-mark::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(118deg,transparent 38%,rgba(111,227,236,.6) 50%,transparent 62%);
}
.brand-mark::after{
  content:"";position:absolute;right:6px;bottom:6px;width:8px;height:8px;border-radius:50%;
  background:var(--gold-500);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{font-family:var(--font-title);font-weight:900;font-size:17px;letter-spacing:.02em;color:var(--paper-0);white-space:nowrap}
.brand-tag{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;color:var(--cyan-300);white-space:nowrap}
.rail-annotation{display:none}

/* 移动导航按钮 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 15px;border-radius:var(--radius-pill);
  border:1px solid rgba(111,227,236,.42);
  background:rgba(18,200,214,.1);
  color:var(--paper-0);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  transition:background-color .2s,border-color .2s;
}
.nav-toggle:hover{background:rgba(18,200,214,.2);border-color:var(--cyan-300)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars span{display:block;height:2px;border-radius:2px;background:var(--cyan-300);transition:transform .24s var(--ease),opacity .18s}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 导航面板（移动端抽屉） */
.site-nav{
  position:fixed;top:0;left:0;bottom:0;z-index:72;
  width:min(322px,86vw);
  display:flex;flex-direction:column;gap:16px;
  padding:calc(var(--topbar-h) + 26px) 20px 26px;
  background:var(--ink-900);
  border-right:1px solid rgba(111,227,236,.24);
  box-shadow:30px 0 70px -30px rgba(3,10,20,.8);
  overflow-y:auto;
  transform:translateX(-102%);
  transition:transform .34s var(--ease);
}
.site-header[data-open] .site-nav{transform:none}
.nav-title{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.3em;color:rgba(111,227,236,.62)}
.nav-list{display:flex;flex-direction:column;gap:5px}
.nav-link{
  position:relative;
  display:grid;grid-template-columns:auto 1fr;gap:13px;align-items:center;
  padding:11px 14px;border-radius:14px;
  border:1px solid transparent;
  color:rgba(246,241,231,.78);
  transition:background-color .2s,border-color .2s,color .2s,transform .2s var(--ease);
}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;width:3px;height:0;
  border-radius:var(--radius-pill);background:var(--cyan-500);
  transform:translateY(-50%);
  transition:height .26s var(--ease);
}
.nav-link .nav-num{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:rgba(18,200,214,.78)}
.nav-link .nav-label{font-size:15px;letter-spacing:.02em}
.nav-link:hover{background:rgba(18,200,214,.1);border-color:rgba(18,200,214,.34);color:#fff;transform:translateX(3px)}
.nav-link[aria-current="page"]{
  background:linear-gradient(100deg,rgba(18,200,214,.22),rgba(18,200,214,.03));
  border-color:rgba(18,200,214,.6);
  color:#fff;
}
.nav-link[aria-current="page"]::before{height:62%}
.nav-link[aria-current="page"] .nav-num{color:var(--gold-500)}
.nav-foot{margin-top:auto;padding-top:18px;border-top:1px dashed rgba(111,227,236,.26);display:flex;flex-direction:column;gap:11px;align-items:flex-start}
.nav-version{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--cyan-300)}
.nav-note{font-size:12.5px;line-height:1.65;color:rgba(246,241,231,.52)}

/* 遮罩与进度灯带 */
.nav-scrim{
  position:fixed;inset:0;z-index:68;
  background:rgba(4,12,22,.64);
  opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s;
}
.site-header[data-open] .nav-scrim{opacity:1;visibility:visible}
.read-progress{
  position:fixed;left:0;right:0;top:0;height:3px;z-index:90;
  pointer-events:none;background:rgba(11,26,43,.25);
}
.read-progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan-500),var(--gold-500));
  transition:width .12s linear;
}

/* ---------- 6. 桌面：轨道与站台 ---------- */
@media (min-width:1024px){
  body{padding-top:0;padding-left:var(--rail-w)}
  .site-header{
    width:var(--rail-w);height:100vh;
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;padding:30px 22px 24px;
    border-bottom:0;border-right:1px solid rgba(111,227,236,.2);
  }
  .rail-brand{
    flex-direction:column;align-items:flex-start;gap:14px;
    padding-bottom:20px;border-bottom:1px solid rgba(111,227,236,.16);
  }
  .rail-annotation{
    display:block;position:absolute;right:10px;top:158px;
    writing-mode:vertical-rl;
    font-family:var(--font-mono);font-size:10px;letter-spacing:.34em;
    color:rgba(111,227,236,.45);
  }
  .nav-toggle{display:none}
  .site-nav{
    position:static;transform:none;width:auto;
    flex:1 1 auto;margin-top:22px;padding:0;
    background:transparent;border:0;box-shadow:none;overflow-y:auto;
  }
  .nav-scrim{display:none}
  .read-progress{left:var(--rail-w);top:0}
}

/* ---------- 7. 按钮体系 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 24px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.02em;
  transition:background-color .2s,color .2s,border-color .2s,transform .2s var(--ease),box-shadow .2s;
}
.btn-sm{padding:9px 17px;font-size:13px}
.btn-gold{background:var(--gold-500);color:#20160A;box-shadow:0 12px 26px -14px rgba(216,160,60,.9)}
.btn-gold:hover{background:var(--gold-200);transform:translateY(-2px)}
.btn-cyan{background:var(--cyan-500);color:#04222C}
.btn-cyan:hover{background:var(--cyan-300);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(18,200,214,.5);color:var(--ink-700);background:transparent}
.btn-ghost:hover{background:rgba(18,200,214,.12);border-color:var(--cyan-500)}
.btn-ink{background:var(--ink-900);color:var(--paper-0)}
.btn-ink:hover{background:var(--ink-700);transform:translateY(-2px)}
.btn-block{width:100%}

/* ---------- 8. 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  border:1px solid transparent;white-space:nowrap;
}
.badge-a{background:rgba(201,123,46,.14);border-color:rgba(201,123,46,.5);color:#8A4E12}
.badge-b{background:rgba(184,92,110,.14);border-color:rgba(184,92,110,.5);color:#8A3446}
.badge-cyan{background:rgba(18,200,214,.14);border-color:rgba(18,200,214,.45);color:#0A7B84}

/* ---------- 9. 布局容器与排版 ---------- */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 clamp(18px,4.5vw,56px)}
.section{padding:clamp(48px,7vw,96px) 0}
.section--tight{padding:clamp(30px,4vw,56px) 0}
.section-head{display:flex;flex-direction:column;gap:12px;max-width:46rem;margin-bottom:clamp(22px,3vw,38px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.28em;color:var(--cyan-500);
}
.eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:var(--cyan-500)}
.lead{font-size:clamp(17px,1.4vw,19px);line-height:1.75;color:var(--ink-700)}
.prose{max-width:34rem}
.prose p+p{margin-top:1em}
.side-note{font-size:14px;line-height:1.72;color:var(--slate-600)}
.split{display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(20px,3vw,40px)}
.compare{display:grid;grid-template-columns:minmax(0,1fr);gap:16px}
@media (min-width:820px){
  .compare{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:900px){
  .split{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 10. 卡片 ---------- */
.card{
  background:var(--paper-0);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  padding:clamp(20px,2.4vw,30px);
  box-shadow:var(--shadow-soft);
}
.card--dark{
  background:var(--ink-900);
  border-color:rgba(18,200,214,.24);
  color:rgba(246,241,231,.82);
}
.card--dark h2,.card--dark h3,.card--dark h4{color:var(--paper-0)}
.card--dark .side-note{color:rgba(246,241,231,.6)}
.card--dark .badge-a{background:rgba(201,123,46,.2);border-color:rgba(201,123,46,.58);color:var(--gold-200)}
.card--dark .badge-b{background:rgba(184,92,110,.22);border-color:rgba(184,92,110,.62);color:#F2C9D2}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--slate-600)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line-cyan)}
.breadcrumb a{color:var(--slate-600)}
.breadcrumb a:hover{color:var(--cyan-500)}

/* ---------- 12. 图片容器（页面阶段放图/占位） ---------- */
.figure{display:block}
.figure-frame{
  position:relative;overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid var(--line-soft);
  background:linear-gradient(150deg,rgba(18,200,214,.16),rgba(11,26,43,.09) 72%);
  box-shadow:var(--shadow-soft);
}
.figure-frame img{width:100%;height:100%;object-fit:cover}
.figure-frame.is-16x9{aspect-ratio:16/9}
.figure-frame.is-4x3{aspect-ratio:4/3}
.figure-frame.is-1x1{aspect-ratio:1/1}
.figure-frame.is-9x16{aspect-ratio:9/16;max-width:300px;margin:0 auto}
.figure-frame.is-placeholder::after{
  content:attr(data-label);
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  padding:14px;text-align:center;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  color:rgba(11,26,43,.45);
}
.figure-cap{margin-top:10px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--slate-600)}
.card--dark .figure-cap{color:rgba(246,241,231,.6)}
.card--dark .figure-frame{border-color:rgba(18,200,214,.22)}

/* ---------- 13. 滚动显现 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 14. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink-900);
  color:rgba(246,241,231,.78);
  border-top:1px solid rgba(18,200,214,.28);
  padding:clamp(40px,6vw,74px) 0 26px;
}
.footer-inner{display:flex;flex-direction:column;gap:clamp(28px,4vw,44px)}
.footer-top{
  display:grid;grid-template-columns:minmax(0,1fr);
  gap:clamp(26px,4vw,44px);
}
@media (min-width:880px){
  .footer-top{grid-template-columns:minmax(260px,1.1fr) minmax(0,1.9fr)}
}
.footer-brand{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.footer-brand-link{display:flex;flex-direction:column;gap:6px}
.footer-brand-name{font-family:var(--font-title);font-weight:900;font-size:24px;letter-spacing:.02em;color:var(--paper-0)}
.footer-brand-line{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.26em;color:var(--cyan-300)}
.footer-versions{display:flex;flex-wrap:wrap;gap:8px}
.footer-note{font-size:13.5px;line-height:1.72;color:rgba(246,241,231,.56);max-width:26rem}
.footer-groups{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(122px,1fr));
  gap:clamp(18px,3vw,32px);
}
.footer-group{display:flex;flex-direction:column;gap:12px}
.footer-group-title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;
  color:rgba(111,227,236,.62);
  padding-bottom:10px;border-bottom:1px solid var(--line-cream);
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-block;font-size:14.5px;color:rgba(246,241,231,.78);
  border-bottom:1px solid transparent;
  transition:color .2s,border-color .2s,transform .2s var(--ease);
}
.footer-link:hover{color:var(--cyan-300);border-bottom-color:var(--cyan-500);transform:translateX(3px)}
.footer-contact{
  display:flex;flex-direction:column;gap:6px;
  padding-top:20px;border-top:1px dashed rgba(111,227,236,.26);
}
.footer-contact-line{font-family:var(--font-mono);font-size:12.5px;line-height:1.75;letter-spacing:.02em;color:rgba(246,241,231,.66)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:baseline;justify-content:space-between;
  padding-top:18px;border-top:1px solid var(--line-cream);
}
.footer-legal{font-family:var(--font-mono);font-size:12px;letter-spacing:.03em;color:rgba(246,241,231,.6)}
.footer-meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.03em;color:rgba(246,241,231,.42)}

/* ---------- 15. 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .read-progress-bar{transition:none}
  .reveal{opacity:1;transform:none}
  .site-nav{transition:none}
}