/* ==========================================================================
   新濠CN · 共享样式 /assets/site.css
   深海档案长卷：深渊蓝底、金属金编号、粗边框与强阴影
   ========================================================================== */

/* ---------- 变量 ---------- */
:root{
  --abyss:#061626;
  --deep:#0B2A45;
  --glass:#123C5E;
  --gold:#D9A94E;
  --gold-soft:#F2D48A;
  --aqua:#17E2B4;
  --orange:#FF7A45;
  --cloud:#EAF2F8;
  --copper:#7F8FA6;
  --ink:#02090F;

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

  --fs-12:0.75rem;
  --fs-14:0.875rem;
  --fs-16:1rem;
  --fs-20:1.25rem;
  --fs-26:1.625rem;
  --fs-34:2.125rem;
  --fs-48:3rem;
  --fs-72:4.5rem;
  --fs-112:7rem;

  --shell:1240px;
  --gutter:clamp(1.25rem,4vw,4rem);
  --gap:clamp(1.25rem,2.4vw,2rem);

  --hairline:1px solid rgba(217,169,78,.45);
  --hairline-soft:1px solid rgba(127,143,166,.24);
  --shadow-card:0 24px 60px rgba(2,9,15,.72);
  --shadow-card-hover:0 32px 74px rgba(2,9,15,.9);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:9rem;
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
summary{list-style:none;cursor:pointer}
summary::-webkit-details-marker{display:none}
table{border-collapse:collapse;width:100%}

:focus{outline:none}
:focus-visible{
  outline:3px solid var(--gold);
  outline-offset:3px;
  box-shadow:0 0 0 2px var(--abyss);
  border-radius:2px;
}

/* ---------- 基础排版 ---------- */
body{
  background:var(--abyss);
  color:var(--cloud);
  font-family:var(--font-body);
  font-size:var(--fs-16);
  font-weight:400;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-head);
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.16;
  color:var(--cloud);
}
h1{font-size:clamp(2.8rem,8vw,7rem);line-height:1.02}
h2{font-size:clamp(1.75rem,3.6vw,3rem)}
h3{font-size:var(--fs-26)}
h4{font-size:var(--fs-20)}
h5{font-size:var(--fs-16)}
strong,b{font-weight:700;color:#fff}
small{font-size:var(--fs-14)}

/* ---------- 通用容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.site-main{
  display:block;
  min-height:40vh;
  padding-bottom:clamp(4rem,10vw,8rem);
}
.section{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(3.5rem,9vw,7rem) var(--gutter);
}
.section--wide{max-width:none}
.section--tight{padding-block:clamp(2rem,5vw,3.5rem)}

.section__head{
  display:flex;
  flex-direction:column;
  gap:.85rem;
  margin-bottom:clamp(1.75rem,4vw,3rem);
}
.section__num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(3rem,9vw,7rem);
  font-weight:500;
  line-height:.82;
  letter-spacing:.02em;
  color:rgba(217,169,78,.22);
}
.section__title{
  font-size:clamp(1.6rem,3.4vw,2.75rem);
  max-width:24em;
}

/* ---------- 文本组件 ---------- */
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--gold);
}
.lede{
  font-size:clamp(1.0625rem,1.6vw,1.375rem);
  line-height:1.85;
  color:#C6D6E6;
  max-width:34em;
}
.prose{
  max-width:36em;
  color:#D6E3EE;
}
.prose p + p,
.prose ul + p,
.prose p + ul{margin-top:1.6em}
.prose ul{margin-top:1em}
.prose li{
  position:relative;
  padding-left:1.4em;
  margin-top:.6em;
}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:10px;
  height:2px;
  background:var(--gold);
}
.prose a{
  color:var(--aqua);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.prose a:hover{color:var(--gold-soft)}
.meta{
  font-family:var(--font-mono);
  font-size:var(--fs-14);
  letter-spacing:.06em;
  color:var(--copper);
}
.mono{
  font-family:var(--font-mono);
  font-weight:500;
  letter-spacing:.06em;
  color:var(--gold-soft);
}

/* ---------- 数据块 ---------- */
.stat{display:flex;flex-direction:column;gap:.4rem}
.stat__num{
  font-family:var(--font-mono);
  font-weight:500;
  font-size:clamp(2.25rem,5vw,4.5rem);
  line-height:1;
  letter-spacing:.02em;
  color:var(--gold-soft);
}
.stat__label{
  font-size:var(--fs-14);
  letter-spacing:.06em;
  color:var(--copper);
}

/* ---------- 装饰 ---------- */
.band{
  height:12px;
  width:100%;
  background:linear-gradient(90deg,var(--gold) 0%,var(--orange) 62%,rgba(255,122,69,.25) 100%);
}
.band--thin{
  height:3px;
  background:linear-gradient(90deg,rgba(217,169,78,.9),rgba(23,226,180,.45));
}

/* ---------- 标签 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.25rem .6rem;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--copper);
  background:rgba(18,60,94,.42);
  border:1px solid rgba(127,143,166,.42);
}
.chip--gold{color:var(--gold-soft);border-color:rgba(217,169,78,.55)}
.chip--aqua{color:var(--aqua);border-color:rgba(23,226,180,.5)}
.chip--orange{color:var(--orange);border-color:rgba(255,122,69,.55)}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  display:block;
  padding:clamp(1.25rem,2.4vw,2rem);
  background:linear-gradient(158deg,rgba(18,60,94,.92) 0%,rgba(11,42,69,.78) 100%);
  border:1px solid var(--glass);
  border-top:1px solid rgba(217,169,78,.55);
  box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover,
.card:focus-within{
  transform:translateY(-4px);
  border-color:var(--gold);
  box-shadow:var(--shadow-card-hover);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  padding:.85rem 1.4rem;
  font-family:var(--font-head);
  font-size:var(--fs-16);
  font-weight:700;
  letter-spacing:.02em;
  color:var(--ink);
  background:linear-gradient(135deg,var(--gold-soft),var(--gold));
  border:1px solid var(--gold);
  box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease);
}
.btn:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-card-hover);
}
.btn--ghost{
  background:transparent;
  color:var(--gold-soft);
  border-color:rgba(217,169,78,.6);
  box-shadow:none;
}
.btn--ghost:hover{
  background:rgba(217,169,78,.12);
  color:var(--cloud);
  border-color:var(--gold);
  box-shadow:0 18px 44px rgba(2,9,15,.7);
}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:var(--gap)}
.grid--12{grid-template-columns:minmax(0,1fr)}
@media (min-width:900px){
  .grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
  .col-4{grid-column:span 4}
  .col-5{grid-column:span 5}
  .col-6{grid-column:span 6}
  .col-7{grid-column:span 7}
  .col-8{grid-column:span 8}
  .col-12{grid-column:span 12}
}

/* ---------- 图片占位容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  border:1px solid rgba(217,169,78,.42);
  background:
    radial-gradient(120% 120% at 12% 8%,rgba(23,226,180,.16),transparent 56%),
    linear-gradient(152deg,var(--deep) 0%,var(--abyss) 58%,var(--glass) 100%);
  box-shadow:var(--shadow-card);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(217,169,78,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(217,169,78,.12) 1px,transparent 1px);
  background-size:52px 52px;
  opacity:.55;
}
.media-frame img,
.media-frame svg{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:.7rem .95rem;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--cloud);
  background:linear-gradient(180deg,transparent,rgba(2,9,15,.88));
}
.media-frame--21x9{aspect-ratio:21/9}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--3x2{aspect-ratio:3/2}
.media-frame--4x3{aspect-ratio:4/3}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.55rem;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--copper);
}
.breadcrumb a{color:var(--gold-soft)}
.breadcrumb a:hover{color:var(--aqua)}
.breadcrumb__sep{color:rgba(127,143,166,.6)}

/* ---------- 显现动效（仅在支持脚本时隐藏初态） ---------- */
.reveal{opacity:1;transform:none}
.has-js .reveal{
  opacity:0;
  transform:translateY(12px);
}
.has-js .reveal.is-visible{
  opacity:1;
  transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;
  left:50%;
  top:-120px;
  transform:translateX(-50%);
  z-index:120;
  padding:.65rem 1.1rem;
  font-family:var(--font-head);
  font-weight:700;
  font-size:var(--fs-14);
  color:var(--ink);
  background:linear-gradient(135deg,var(--gold-soft),var(--gold));
  border:1px solid var(--gold);
  box-shadow:var(--shadow-card);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:.6rem}

/* ==========================================================================
   页头：居中刊头 + 栏目带 + 阅读进度轨
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(6,22,38,.985) 0%,rgba(11,42,69,.95) 100%);
  border-bottom:1px solid rgba(217,169,78,.45);
  -webkit-backdrop-filter:blur(9px);
  backdrop-filter:blur(9px);
}
.masthead{
  padding:clamp(1rem,2.6vw,2.1rem) var(--gutter) clamp(.75rem,1.8vw,1.15rem);
}
.masthead__inner{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.6rem;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  text-align:center;
}
.masthead__lockup{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:center;
  gap:.5rem 1rem;
}
.brand{display:inline-flex;align-items:baseline}
.brand__mark{
  display:inline-block;
  padding-bottom:.35rem;
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(1.7rem,4.4vw,2.75rem);
  letter-spacing:-.02em;
  line-height:1;
  color:var(--cloud);
  border-bottom:3px solid transparent;
  border-image:linear-gradient(90deg,var(--gold),var(--orange)) 1;
  transition:font-size .18s var(--ease);
}
.issue-chip{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.3rem .6rem;
  font-family:var(--font-mono);
  font-size:var(--fs-14);
  letter-spacing:.06em;
  background:rgba(217,169,78,.09);
  border:1px solid rgba(217,169,78,.5);
}
.issue-chip__k{color:var(--copper)}
.issue-chip__v{color:var(--gold-soft)}

.masthead__sub{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:.75rem 1.25rem;
}
.brand__tagline{
  font-size:var(--fs-14);
  letter-spacing:.16em;
  color:var(--copper);
}
.masthead__cta{
  padding:.35rem .75rem;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--gold);
  border:1px solid rgba(217,169,78,.6);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.masthead__cta:hover{
  color:var(--ink);
  background:var(--gold);
  border-color:var(--gold);
}

/* 栏目带 */
.site-nav{
  display:block;
  padding:0 var(--gutter);
  border-top:1px solid rgba(217,169,78,.2);
}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:clamp(.35rem,2.2vw,2rem);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:block;
  padding:.72rem .35rem;
  font-size:.9375rem;
  font-weight:500;
  color:#B9C9DA;
  transition:color .18s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:.35rem;
  right:.35rem;
  bottom:.4rem;
  height:2px;
  background:var(--aqua);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease),background .18s var(--ease);
}
.site-nav__link:hover{color:var(--aqua)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--gold-soft)}
.site-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:linear-gradient(90deg,var(--gold),var(--orange));
}

/* 移动导航按钮 */
.nav-toggle{
  position:absolute;
  left:0;
  top:0;
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.4rem .65rem;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--gold-soft);
  background:rgba(6,22,38,.7);
  border:1px solid rgba(217,169,78,.5);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--aqua);color:var(--aqua)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:14px;
  height:10px;
  border-top:2px solid currentColor;
  border-bottom:2px solid currentColor;
}
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:4px;
  height:2px;
  background:currentColor;
}
.nav-toggle__label{display:inline-block}

/* 阅读进度轨 */
.progress-rail{
  position:relative;
  height:2px;
  overflow:hidden;
  background:rgba(127,143,166,.22);
}
.progress-rail__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--gold),var(--orange));
  transition:width .1s linear;
}

/* 收拢态 */
.site-header.is-condensed .masthead{
  padding-top:.5rem;
  padding-bottom:.4rem;
}
.site-header.is-condensed .brand__mark{font-size:1.15rem}
.site-header.is-condensed .issue-chip{font-size:var(--fs-12);padding:.18rem .45rem}
.site-header.is-condensed .masthead__sub{display:none}
.site-header.is-condensed .site-nav__link{padding-top:.45rem;padding-bottom:.45rem}

/* 移动端栏目带 */
@media (max-width:899px){
  .nav-toggle{display:inline-flex}
  .masthead__inner{padding-top:2.6rem}
  .site-nav{display:none;padding-bottom:.75rem;background:rgba(2,9,15,.72)}
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(127,143,166,.18)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{padding:.95rem .25rem;font-size:var(--fs-16)}
  .site-nav__link::after{left:.25rem;right:auto;width:22px;bottom:.55rem}
  .site-nav__link[aria-current="page"]::after{width:42px}
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,7rem);
  background:var(--ink);
  border-top:1px solid rgba(217,169,78,.45);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:6px;
  background:linear-gradient(90deg,var(--gold) 0%,var(--orange) 55%,var(--aqua) 100%);
}
.site-footer__inner{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(2rem,4vw,3.25rem);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(2.75rem,6vw,5rem) var(--gutter) clamp(1.75rem,4vw,3rem);
}
@media (min-width:760px){
  .site-footer__inner{grid-template-columns:1.25fr 2fr 1.4fr}
}
.footer-brand{display:flex;flex-direction:column;gap:.7rem}
.footer-brand__mark{
  font-family:var(--font-head);
  font-weight:900;
  font-size:var(--fs-26);
  letter-spacing:-.01em;
  color:var(--cloud);
}
.footer-brand__tagline{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.1em;
  color:var(--gold);
}
.footer-brand__note{
  max-width:26em;
  font-size:var(--fs-14);
  line-height:1.9;
  color:var(--copper);
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(1.5rem,3vw,2.25rem);
}
@media (min-width:520px){
  .footer-nav{grid-template-columns:repeat(3,minmax(0,1fr))}
}
.footer-col{display:flex;flex-direction:column;gap:.85rem}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  font-weight:500;
  letter-spacing:.16em;
  color:var(--gold-soft);
  padding-bottom:.5rem;
  border-bottom:1px solid rgba(217,169,78,.35);
}
.footer-col__list{display:flex;flex-direction:column;gap:.55rem}
.footer-link{
  display:inline-block;
  font-size:var(--fs-14);
  color:#AEBDCD;
  transition:color .18s var(--ease);
}
.footer-link:hover{color:var(--aqua)}
.footer-contact{display:flex;flex-direction:column;gap:.85rem}
.footer-contact__item{
  display:flex;
  flex-direction:column;
  gap:.15rem;
  font-size:var(--fs-14);
  line-height:1.75;
  color:#C6D6E6;
  word-break:break-word;
}
.footer-contact__k{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--copper);
}
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.5rem;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:1.1rem var(--gutter) 2.25rem;
  border-top:1px solid rgba(127,143,166,.2);
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--copper);
}
.site-footer__legal,
.site-footer__copy{margin:0}

/* ==========================================================================
   动效与无障碍降级
   ========================================================================== */
@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 .reveal{opacity:1;transform:none}
  .card:hover,.card:focus-within,.btn:hover{transform:none}
}