/* =============================================================
   久赢平台官网 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{ margin:0; }
ul,ol{ padding:0; list-style:none; }
img,svg,video{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; background:none; border:0; }
:where(a,button,[tabindex],summary):focus-visible{ outline:2px solid var(--coral); outline-offset:3px; }

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#0B1230;
  --indigo:#16204A;
  --star:#2A3A78;
  --gold:#D6A747;
  --gold-hi:#F4CE86;
  --celadon:#63A99B;
  --coral:#FF6A48;
  --coral-hi:#FF8266;
  --paper:#F6F2E9;
  --paper-ink:#0A0F22;
  --mist:#9AA6C7;
  --text:#E7EBF7;
  --hair:rgba(214,167,71,.28);
  --hair-soft:rgba(154,166,199,.2);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --wrap:1240px;
  --gap:24px;
  --radius:14px;
  --radius-sm:8px;
  --header-h:88px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
@media (max-width:960px){
  :root{ --header-h:76px; --gap:18px; }
}

/* ---------- 3. 中文排版 ---------- */
html{ font-size:16px; }
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    linear-gradient(to right, rgba(154,166,199,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(154,166,199,.04) 1px, transparent 1px);
  background-size:96px 96px;
  letter-spacing:.01em;
}
h1,h2,h3,h4{ font-family:var(--font-serif); font-weight:800; line-height:1.24; letter-spacing:-.02em; color:var(--paper); }
h1{ font-size:clamp(34px,5.4vw,56px); }
h2{ font-size:clamp(26px,3.6vw,40px); }
h3{ font-size:clamp(20px,2.4vw,28px); }
h4{ font-size:22px; }
p{ max-width:38em; }
p + p{ margin-top:14px; }
strong,b{ color:var(--gold-hi); font-weight:700; }
small{ font-size:13.5px; color:var(--mist); }
code,kbd{ font-family:var(--font-mono); font-size:.92em; }
::selection{ background:var(--gold); color:var(--ink); }
.visually-hidden{
  position:absolute!important; width:1px; height:1px; margin:-1px;
  padding:0; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0;
}

/* ---------- 4. 布局容器 ---------- */
.container{ width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:clamp(16px,4vw,32px); }
.section{ padding-block:clamp(52px,7vw,104px); }
#main-content{ display:block; padding-top:calc(var(--header-h) + 12px); scroll-margin-top:calc(var(--header-h) + 12px); }

.section-head{ display:flex; align-items:center; gap:14px; margin-bottom:clamp(22px,3vw,34px); }
.section-index{ font-family:var(--font-mono); font-size:13px; letter-spacing:.16em; color:var(--gold); white-space:nowrap; }
.section-title{ font-size:clamp(22px,3vw,32px); }
.section-line{ flex:1; height:1px; background:linear-gradient(90deg,var(--gold),rgba(214,167,71,0)); }

.grid{ display:grid; gap:var(--gap); grid-template-columns:repeat(12,1fr); }
.grid-8{ display:grid; gap:var(--gap); grid-template-columns:repeat(8,1fr); }
.layout-split{ display:grid; grid-template-columns:3fr 7fr; gap:clamp(24px,4vw,56px); align-items:start; }
@media (max-width:960px){
  .grid,.grid-8{ grid-template-columns:repeat(6,1fr); }
  .layout-split{ grid-template-columns:1fr; gap:32px; }
}
@media (max-width:640px){
  .grid,.grid-8{ grid-template-columns:1fr; }
}

/* ---------- 5. 材质 ---------- */
.glass-panel{
  background:linear-gradient(148deg,rgba(42,58,120,.62),rgba(22,32,74,.88));
  border:1px solid var(--hair);
  border-radius:var(--radius);
  backdrop-filter:blur(12px) saturate(1.15);
  -webkit-backdrop-filter:blur(12px) saturate(1.15);
  box-shadow:inset 0 1px 0 rgba(246,242,233,.06);
}
.slab{
  background:rgba(22,32,74,.72);
  border:1px solid var(--hair-soft);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,26px);
}
.paper{
  position:relative;
  background:var(--paper);
  color:var(--paper-ink);
  border-radius:6px;
  padding:clamp(24px,3.6vw,44px);
  box-shadow:0 1px 0 rgba(10,15,34,.14), 8px 10px 0 -1px rgba(22,32,74,.95), 8px 10px 0 0 var(--hair);
}
.paper h1,.paper h2,.paper h3,.paper h4,.paper .section-title{ color:var(--paper-ink); }
.paper p{ color:#1B2338; }
.paper a:not(.btn){ color:#8A5A12; text-decoration:underline; text-underline-offset:3px; }
.paper .section-line{ background:linear-gradient(90deg,rgba(138,90,18,.75),rgba(138,90,18,0)); }
.paper .section-index{ color:#8A5A12; }

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:11px 20px; border-radius:999px;
  font-family:var(--font-sans); font-size:14.5px; font-weight:600; letter-spacing:.02em;
  border:1px solid transparent; cursor:pointer; white-space:nowrap;
  transition:transform .22s var(--ease), background-color .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}
.btn-accent{ background:var(--coral); color:var(--ink); }
.btn-accent:hover{ background:var(--coral-hi); transform:translateY(-2px); }
.btn-ghost{ background:rgba(42,58,120,.3); border-color:var(--hair); color:var(--gold-hi); }
.btn-ghost:hover{ background:rgba(42,58,120,.72); color:var(--paper); transform:translateY(-2px); }
.btn-quiet{ padding:6px 0; border-radius:4px; color:var(--gold-hi); text-decoration:underline; text-underline-offset:4px; }
.btn-quiet:hover{ color:var(--paper); }

/* ---------- 7. 标签 / 索引 / 数据 ---------- */
.tag{
  display:inline-flex; align-items:center; gap:6px;
  font-family:var(--font-mono); font-size:14px; letter-spacing:.04em;
  padding:4px 11px; border-radius:999px; border:1px solid currentColor;
}
.tag-gold{ color:var(--gold-hi); background:rgba(214,167,71,.12); }
.tag-celadon{ color:var(--celadon); background:rgba(99,169,155,.12); }
.tag-coral{ color:var(--coral); background:rgba(255,106,72,.12); }

.mono-index{ font-family:var(--font-mono); font-size:13px; letter-spacing:.16em; color:var(--gold); }

.ledger{ border-top:1px solid var(--hair); }
.ledger-row{
  display:grid; grid-template-columns:88px 1fr; gap:20px;
  padding:18px 0; border-bottom:1px solid rgba(154,166,199,.16);
}
.ledger-index{ font-family:var(--font-mono); font-size:13px; letter-spacing:.1em; color:var(--gold); }
@media (max-width:560px){
  .ledger-row{ grid-template-columns:1fr; gap:6px; }
}

.stat-row{ display:flex; flex-wrap:wrap; gap:clamp(20px,4vw,52px); }
.stat-value{ font-family:var(--font-serif); font-weight:800; font-size:clamp(28px,4vw,40px); letter-spacing:-.02em; color:var(--paper); line-height:1.2; }
.stat-label{ font-family:var(--font-mono); font-size:13px; letter-spacing:.08em; color:var(--mist); }

/* ---------- 8. 面包屑 / 锚点索引 / 手风琴 / 筛选 ---------- */
.breadcrumb{ display:flex; flex-wrap:wrap; align-items:center; gap:10px; font-family:var(--font-mono); font-size:13px; color:var(--mist); }
.breadcrumb a{ color:var(--mist); }
.breadcrumb a:hover{ color:var(--gold-hi); }
.breadcrumb .sep{ color:rgba(214,167,71,.65); }

.anchor-index{ position:sticky; top:calc(var(--header-h) + 20px); }
.anchor-index a{
  display:block; padding:9px 12px; font-size:14.5px; color:var(--mist);
  border-left:1px solid rgba(154,166,199,.25); transition:color .2s var(--ease), border-color .2s var(--ease);
}
.anchor-index a:hover{ color:var(--paper); border-left-color:var(--gold); }
.anchor-index a[aria-current="true"]{ color:var(--gold-hi); border-left-color:var(--coral); }

.disclosure{ border-bottom:1px solid rgba(154,166,199,.18); }
.disclosure-trigger{
  display:flex; width:100%; align-items:center; justify-content:space-between; gap:16px;
  padding:18px 0; text-align:left; cursor:pointer; color:var(--paper); font-size:17px;
}
.disclosure-trigger::after{ content:"+"; font-family:var(--font-mono); color:var(--gold); }
.disclosure[data-open="true"] .disclosure-trigger::after{ content:"–"; color:var(--coral); }
.disclosure-panel{ padding-bottom:18px; color:var(--mist); }
.disclosure[data-open="false"] .disclosure-panel{ display:none; }

.filter-bar{
  display:flex; flex-wrap:wrap; gap:10px; padding:10px;
  border:1px solid rgba(154,166,199,.2); border-radius:999px; background:rgba(22,32,74,.5);
}
.filter-btn{
  font-family:var(--font-mono); font-size:13px; letter-spacing:.06em;
  padding:7px 14px; border-radius:999px; border:1px solid transparent;
  color:var(--mist); cursor:pointer; transition:color .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
}
.filter-btn:hover{ color:var(--paper); background:rgba(42,58,120,.85); }
.filter-btn[aria-pressed="true"]{ color:var(--coral); border-color:var(--coral); background:rgba(255,106,72,.1); }
[data-filter-item][hidden]{ display:none !important; }

/* ---------- 9. 图片容器（供页面阶段放置图片占位） ---------- */
.media-frame{
  position:relative; overflow:hidden; border-radius:var(--radius);
  border:1px solid rgba(214,167,71,.24);
  background:
    linear-gradient(140deg,rgba(42,58,120,.66),rgba(11,18,48,.92)),
    repeating-linear-gradient(45deg, rgba(154,166,199,.06) 0 12px, transparent 12px 24px);
}
.media-frame > img,
.media-frame > picture,
.media-frame > svg{ display:block; width:100%; height:100%; }
.media-frame > img,
.media-frame > picture > img,
.media-frame > svg{ object-fit:cover; }
.frame-21x9{ aspect-ratio:21/9; }
.frame-16x9{ aspect-ratio:16/9; }
.frame-4x3{ aspect-ratio:4/3; }
.frame-1x1{ aspect-ratio:1/1; }
.frame-3x4{ aspect-ratio:3/4; }
@media (max-width:640px){
  .frame-21x9{ aspect-ratio:16/9; }
  .frame-3x4{ aspect-ratio:4/5; }
}
.figure-cap{ margin-top:10px; font-family:var(--font-mono); font-size:13px; color:var(--mist); }

/* ---------- 10. 显现动效 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease), transform .32s var(--ease);
}
.has-js [data-reveal][data-revealed="true"]{ opacity:1; transform:none; }

/* =============================================================
   11. 头部：悬浮胶囊浮岛 + 蓝图刻度轴
   ============================================================= */
.site-header{
  position:fixed; inset:0 0 auto 0; z-index:100;
  padding:14px clamp(12px,3vw,32px) 0;
  background:linear-gradient(180deg,rgba(11,18,48,.97) 0%,rgba(11,18,48,.82) 58%,rgba(11,18,48,0) 100%);
  transition:padding .28s var(--ease);
}
.header-shell{
  position:relative;
  width:100%; max-width:var(--wrap); margin-inline:auto;
  display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:16px;
  padding:10px 14px 10px 18px;
  border:1px solid rgba(214,167,71,.24);
  border-radius:999px;
  background:linear-gradient(120deg,rgba(22,32,74,.94),rgba(11,18,48,.88));
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  box-shadow:0 20px 44px -26px rgba(0,0,0,.95), inset 0 1px 0 rgba(246,242,233,.07);
  transition:padding .28s var(--ease), border-radius .28s var(--ease), background-color .28s var(--ease);
}
.header-axis{
  max-width:var(--wrap); margin:7px auto 0; height:7px;
  border-top:1px solid rgba(154,166,199,.16);
  background-image:repeating-linear-gradient(90deg, rgba(214,167,71,.55) 0 1px, transparent 1px 48px);
  pointer-events:none; opacity:.75;
}

/* 品牌 */
.brand{ display:inline-flex; align-items:center; gap:12px; }
.brand-mark{
  display:inline-flex; align-items:center; justify-content:center;
  padding:6px 11px; border-radius:12px;
  border:1px solid rgba(214,167,71,.5);
  background:rgba(214,167,71,.1);
  font-family:var(--font-serif); font-weight:900; font-size:17px; letter-spacing:.06em; color:var(--gold-hi);
}
.brand-text{ display:flex; flex-direction:column; line-height:1.25; }
.brand-name{ font-family:var(--font-serif); font-weight:700; font-size:16px; color:var(--paper); letter-spacing:.01em; }
.brand-sub{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:.1em; color:var(--mist); }

/* 栏目胶囊 */
.nav-capsule{ display:flex; justify-content:center; min-width:0; }
.nav-list{ display:flex; align-items:center; gap:2px; }
.nav-link{
  display:inline-block; padding:8px 14px; border-radius:999px;
  font-size:14.5px; color:var(--mist); white-space:nowrap;
  transition:background-color .2s var(--ease), color .2s var(--ease);
}
.nav-link:hover{ background:rgba(42,58,120,.9); color:var(--paper); }
.nav-link[aria-current="page"]{ background:var(--gold); color:var(--ink); font-weight:700; }

/* 右侧行动区 */
.header-actions{ display:flex; align-items:center; gap:12px; }
.header-utility{
  font-family:var(--font-mono); font-size:13px; letter-spacing:.06em; color:var(--celadon);
  padding:7px 12px; border-radius:999px; border:1px dashed rgba(99,169,155,.5);
  transition:background-color .2s var(--ease), color .2s var(--ease);
  white-space:nowrap;
}
.header-utility:hover{ background:rgba(99,169,155,.16); color:var(--paper); }
.header-cta{ padding:10px 18px; }

/* 移动导航按钮 */
.nav-toggle{
  display:none; align-items:center; gap:9px;
  padding:9px 14px; border-radius:999px;
  border:1px solid var(--hair); background:rgba(42,58,120,.5);
  font-family:var(--font-mono); font-size:13px; letter-spacing:.08em; color:var(--paper); cursor:pointer;
  transition:background-color .2s var(--ease);
}
.nav-toggle:hover{ background:rgba(42,58,120,.85); }
.nav-toggle-bars{ display:inline-flex; flex-direction:column; gap:4px; width:16px; }
.nav-toggle-bars > span{ display:block; height:2px; border-radius:2px; background:var(--gold); transition:transform .22s var(--ease), opacity .22s var(--ease); }
.nav-toggle-bars > span:nth-child(2){ width:70%; }
.site-header[data-open="true"] .nav-toggle-bars > span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-bars > span:nth-child(2){ opacity:0; }
.site-header[data-open="true"] .nav-toggle-bars > span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

/* 收窄态 */
.site-header[data-condensed="true"]{ padding-top:8px; }
.site-header[data-condensed="true"] .header-shell{ padding:6px 12px 6px 14px; }
.site-header[data-condensed="true"] .brand-sub{ display:none; }
.site-header[data-condensed="true"] .header-utility{ display:none; }
.site-header[data-condensed="true"] .header-axis{ opacity:0; }

/* Skip link */
.skip-link{
  position:absolute; left:50%; top:8px; transform:translate(-50%,-160%);
  z-index:120; padding:10px 18px; border-radius:999px;
  background:var(--gold); color:var(--ink); font-weight:700; font-size:14px;
  transition:transform .2s var(--ease);
}
.skip-link:focus{ transform:translate(-50%,0); }

/* 头部断点 */
@media (max-width:1180px){
  .brand-sub{ display:none; }
  .header-utility{ display:none; }
  .nav-link{ padding:7px 11px; font-size:13.5px; }
}
@media (max-width:960px){
  .header-shell{ grid-template-columns:1fr auto; border-radius:26px; padding:10px 12px 10px 16px; }
  .nav-toggle{ display:inline-flex; }
  .header-cta{ padding:9px 14px; font-size:13.5px; }
  .nav-capsule{
    position:absolute; left:0; right:0; top:calc(100% + 10px);
    display:none; padding:14px;
    border:1px solid var(--hair); border-radius:22px;
    background:linear-gradient(160deg,rgba(22,32,74,.99),rgba(11,18,48,.99));
    box-shadow:0 30px 60px -30px rgba(0,0,0,1);
    backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
  }
  .site-header[data-open="true"] .nav-capsule{ display:block; }
  .nav-list{ flex-direction:column; align-items:stretch; gap:4px; }
  .nav-link{ display:block; padding:13px 16px; border-radius:14px; font-size:16px; }
  .nav-link[aria-current="page"]{ background:rgba(214,167,71,.16); color:var(--gold-hi); box-shadow:inset 0 0 0 1px var(--gold); }
}
@media (max-width:560px){
  .brand-text{ display:none; }
  .header-cta{ padding:8px 12px; }
}
@media (max-width:400px){
  .nav-toggle-text{ display:none; }
  .nav-toggle{ padding:9px 11px; }
}

/* =============================================================
   12. 页脚：靛夜索引卡
   ============================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  padding-block:clamp(42px,6vw,72px) 26px;
  background:linear-gradient(180deg,rgba(11,18,48,0) 0%,rgba(11,18,48,.9) 16%,var(--ink) 42%);
  border-top:1px solid rgba(214,167,71,.38);
  color:var(--text);
}
.footer-grid{ display:grid; grid-template-columns:1.3fr 1fr 1fr 1.25fr; }
.footer-col{ padding:0 clamp(14px,2vw,28px); border-left:1px solid rgba(214,167,71,.22); }
.footer-col:first-child{ padding-left:0; border-left:0; }
.footer-col-title{
  font-family:var(--font-mono); font-size:13px; letter-spacing:.2em;
  color:var(--gold); margin-bottom:16px;
}

.footer-mark{
  display:inline-flex; align-items:center; padding:6px 11px; margin-bottom:14px;
  border:1px solid rgba(214,167,71,.5); border-radius:12px; background:rgba(214,167,71,.1);
  font-family:var(--font-serif); font-weight:900; font-size:17px; letter-spacing:.06em; color:var(--gold-hi);
}
.footer-brand-name{ font-family:var(--font-serif); font-weight:800; font-size:20px; color:var(--paper); margin-bottom:10px; }
.footer-brand-line{ font-size:14.5px; line-height:1.75; color:var(--mist); max-width:30em; }
.footer-brand-line--mono{ font-family:var(--font-mono); font-size:13px; letter-spacing:.06em; color:rgba(154,166,199,.8); margin-top:6px; }

.footer-list{ display:flex; flex-direction:column; gap:10px; }
.footer-list--legal{ margin-top:16px; padding-top:14px; border-top:1px dashed rgba(154,166,199,.26); }
.footer-link{
  font-size:14.5px; color:var(--mist);
  transition:color .2s var(--ease), padding-left .2s var(--ease);
}
.footer-link:hover{ color:var(--gold-hi); padding-left:4px; }

.footer-cats{ gap:9px; }
.footer-cat{ display:flex; align-items:center; gap:10px; font-size:14.5px; }
.cat-num{ font-family:var(--font-mono); font-size:12.5px; letter-spacing:.1em; color:var(--gold); min-width:22px; }

.footer-contact-line{ display:flex; flex-wrap:wrap; align-items:center; gap:10px; margin-bottom:10px; }
.footer-contact-key{ font-family:var(--font-mono); font-size:12.5px; letter-spacing:.1em; color:var(--mist); }
.footer-contact-value{ font-size:15px; color:var(--paper); word-break:break-all; }
.footer-addr{ font-size:14.5px; line-height:1.7; color:var(--mist); margin:6px 0 12px; max-width:26em; }

.copy-btn{
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.08em;
  padding:4px 11px; border-radius:999px; cursor:pointer;
  border:1px solid var(--hair); color:var(--celadon); background:transparent;
  transition:background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.copy-btn:hover{ background:rgba(99,169,155,.16); color:var(--paper); }
.copy-btn[data-copied="true"]{ background:var(--celadon); border-color:var(--celadon); color:var(--ink); }

.footer-bottom{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:12px;
  margin-top:clamp(32px,4vw,52px); padding-top:18px;
  border-top:1px solid rgba(214,167,71,.22);
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.06em; color:var(--mist);
}
.footer-icp,.footer-note{ max-width:none; }

@media (max-width:1080px){
  .footer-grid{ grid-template-columns:repeat(2,1fr); gap:34px 28px; }
  .footer-col{ padding:0; border-left:0; }
}
@media (max-width:640px){
  .footer-grid{ grid-template-columns:1fr; gap:30px; }
  .footer-brand-line{ max-width:none; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
}

/* =============================================================
   13. 减少动态
   ============================================================= */
@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]{ transform:none !important; }
  .btn-accent:hover,.btn-ghost:hover,.footer-link:hover{ transform:none; padding-left:0; }
}