/* ===========================================================
   利赢国际站 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   =========================================================== */

:root{
  --signal:#FF5A1F;
  --blue:#0B3B6F;
  --blue-mid:#1F5E9E;
  --yellow:#FFD23F;
  --ink:#121820;
  --paper:#F7F4EE;
  --mist:#E7EEF7;
  --orange-mist:#FFE7DF;
  --yellow-mist:#FFF3C4;
  --green:#1E8E5A;
  --slate:#5B6672;

  --line:rgba(18,24,32,.14);
  --line-soft:rgba(18,24,32,.08);
  --on-blue-line:rgba(255,255,255,.18);

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

  --maxw:1240px;
  --gutter:clamp(16px,4vw,40px);
  --header-h:64px;

  --r-xs:3px;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:18px;

  --dur:200ms;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,textarea,select{font:inherit}
a{color:var(--blue-mid);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- 中文排版与全局基调 ---------- */
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:clamp(32px,5vw,68px)}
h2{font-size:clamp(24px,3.2vw,40px)}
h3{font-size:clamp(19px,2vw,24px)}
h4{font-size:17px;line-height:1.4}
strong,b{font-weight:700}
#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 18px)}

:focus-visible{outline:3px solid var(--blue-mid);outline-offset:2px;border-radius:2px}
.site-header :focus-visible{outline-color:var(--blue-mid)}
.site-footer :focus-visible{outline-color:var(--yellow);outline-offset:3px}

/* ---------- 布局基元 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(40px,6vw,76px)}
.section--tight{padding-block:clamp(26px,4vw,44px)}
.prose{max-width:42em;color:var(--ink)}
.prose p + p{margin-top:1em}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.5em}
.prose ul,.prose ol{margin-block:1em;padding-left:1.3em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.4em}
.prose a{color:var(--blue-mid);text-decoration:underline;text-underline-offset:3px}

.eyebrow{
  display:flex;align-items:center;gap:9px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--slate);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--signal);flex:0 0 auto}

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

.rule{height:1px;background:var(--line);border:0;margin-block:clamp(20px,3vw,32px)}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  border-radius:var(--r-sm);
  font-family:var(--font-body);
  font-size:15px;font-weight:700;line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--signal);color:var(--ink);box-shadow:0 8px 20px -14px rgba(255,90,31,.9)}
.btn--primary:hover{background:#FF6E3A}
.btn--blue{background:var(--blue);color:#fff}
.btn--blue:hover{background:#0E4A89}
.btn--ghost{background:transparent;color:var(--ink);border-color:rgba(18,24,32,.28)}
.btn--ghost:hover{background:var(--mist);border-color:rgba(18,24,32,.42)}

.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-weight:700;font-size:14px;color:var(--blue-mid);
  text-decoration:none;
}
.link-more::after{content:"→";font-family:var(--font-mono);transition:transform var(--dur) var(--ease)}
.link-more:hover{text-decoration:none}
.link-more:hover::after{transform:translateX(3px)}

/* ---------- 标签与状态 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border-radius:var(--r-xs);
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.06em;line-height:1.6;
  background:var(--mist);color:var(--blue);
}
.tag--signal{background:var(--orange-mist);color:#A8390D}
.tag--yellow{background:var(--yellow-mist);color:#6B4E00}
.tag--green{background:#DDF1E6;color:var(--green)}

.status-dot{
  display:inline-block;flex:0 0 auto;
  width:7px;height:7px;border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 3px rgba(30,142,90,.22);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:var(--slate);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:rgba(91,102,114,.5)}
.breadcrumb a{color:var(--blue-mid)}
.breadcrumb a:hover{color:var(--signal);text-decoration:none}

/* ---------- 块与栅格 ---------- */
.panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:clamp(18px,2.4vw,28px);
}
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 图片容器基础 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:
    linear-gradient(148deg,var(--mist) 0%,#FFFFFF 52%,var(--orange-mist) 100%);
}
.media-frame > img,
.media-frame > svg,
.media-frame > picture{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}

/* ---------- 显现协议 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
html.js [data-reveal][data-revealed="true"]{opacity:1;transform:none}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  transform:translateY(-180%);
  display:inline-block;
  padding:10px 16px;border-radius:var(--r-sm);
  background:var(--ink);color:#fff;
  font-size:14px;font-weight:700;text-decoration:none;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:none;text-decoration:none;outline:3px solid var(--yellow);outline-offset:2px}

/* ===========================================================
   头部：固定命令栏
   =========================================================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(247,244,238,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header[data-scrolled]{
  border-bottom-color:rgba(18,24,32,.24);
  box-shadow:0 10px 24px -18px rgba(18,24,32,.6);
}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:var(--signal);
  pointer-events:none;
  will-change:transform;
}

.command-bar{
  position:relative;
  display:flex;align-items:center;gap:18px;
  width:100%;max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
}

.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;
  padding-block:6px;
  color:var(--ink);
  text-decoration:none;
}
.brand:hover{text-decoration:none}
.brand-mark{
  position:relative;
  padding-left:14px;
  font-family:var(--font-display);
  font-size:19px;font-weight:900;line-height:1.2;letter-spacing:-.02em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-mark::before{
  content:"";
  position:absolute;left:0;top:50%;
  width:6px;height:20px;
  background:var(--signal);
  border-radius:1px;
  transform:translateY(-50%) skewY(-12deg);
}
.brand-tag{
  padding-left:10px;
  border-left:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;
  color:var(--slate);
  white-space:nowrap;
}

.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;gap:8px;
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#fff;color:var(--ink);
  font-size:13px;font-weight:700;line-height:1;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{background:var(--mist);border-color:rgba(18,24,32,.3)}
.nav-toggle-bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:100%;height:2px;
  background:var(--ink);border-radius:1px;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{top:8px}
.site-header[data-open] .nav-toggle-bars::before{top:4px;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle-bars::after{top:4px;transform:rotate(-45deg)}
.nav-toggle-label{display:inline-block;min-width:2em;text-align:left}

.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{flex:0 0 auto}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 12px;
  border-radius:var(--r-sm);
  font-size:14px;font-weight:600;line-height:1.4;
  color:var(--ink);
  text-decoration:none;white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-link:hover{background:var(--mist);text-decoration:none}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
  color:var(--slate);
}
.nav-link[aria-current="page"]{
  background:var(--signal);
  color:var(--ink);
}
.nav-link[aria-current="page"] .nav-idx{color:rgba(18,24,32,.66)}
.nav-link[aria-current="page"]:hover{background:#FF6E3A;text-decoration:none}

/* ===========================================================
   页脚：稳定蓝基底
   =========================================================== */
.site-footer{
  margin-top:clamp(56px,8vw,104px);
  background:var(--blue);
  color:#fff;
  border-top:3px solid var(--signal);
}
.footer-inner{
  width:100%;max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(34px,5vw,58px) var(--gutter) 0;
}
.footer-top{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:18px 32px;
  padding-bottom:24px;
  border-bottom:1px solid var(--on-blue-line);
}
.footer-brand{display:grid;gap:4px;min-width:0}
.footer-mark{
  font-family:var(--font-display);
  font-size:clamp(22px,3vw,30px);
  font-weight:900;letter-spacing:-.02em;line-height:1.2;
  color:#fff;
}
.footer-summary{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.04em;
  color:rgba(255,255,255,.66);
}
.footer-status{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 12px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.09);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.04em;
  color:rgba(255,255,255,.84);
}
.footer-status .status-dot{box-shadow:0 0 0 3px rgba(30,142,90,.3)}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:26px 24px;
  padding-block:clamp(26px,4vw,42px);
}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--yellow);
}
.footer-list{display:grid;gap:9px}
.footer-link{
  display:inline-block;
  font-size:14px;line-height:1.5;
  color:rgba(255,255,255,.82);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.footer-link:hover{
  color:#fff;
  text-decoration:underline;
  text-decoration-color:var(--signal);
  text-underline-offset:4px;
}

.footer-contact{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px 32px;
  padding-block:24px;
  border-top:1px solid var(--on-blue-line);
}
.footer-contact-item{min-width:0;font-size:13.5px;line-height:1.65;color:rgba(255,255,255,.78)}
.footer-contact-label{
  display:block;margin-bottom:2px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:rgba(255,255,255,.5);
}
.footer-contact-value{
  display:block;
  color:#fff;font-weight:600;
  word-break:break-word;
}
.footer-contact-note{
  display:block;
  font-size:12px;
  color:rgba(255,255,255,.55);
}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  padding:18px 0 24px;
  border-top:1px solid var(--on-blue-line);
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.04em;
  color:rgba(255,255,255,.58);
}
.footer-note{color:rgba(255,255,255,.58)}
.footer-icp{color:rgba(255,255,255,.74);white-space:nowrap}
.footer-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px}
.footer-meta .footer-link{font-size:11.5px;color:rgba(255,255,255,.74)}

/* ===========================================================
   响应式
   =========================================================== */
@media (max-width:1100px){
  .brand-tag{display:none}
}

@media (max-width:900px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:860px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    margin-left:0;
    padding:12px var(--gutter) 20px;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    box-shadow:0 20px 30px -26px rgba(18,24,32,.7);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) linear;
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:5px}
  .nav-item{width:100%}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:12px 14px;
    font-size:15px;
    background:#fff;
    box-shadow:inset 0 0 0 1px var(--line-soft);
  }
  .nav-link[aria-current="page"]{background:var(--signal);box-shadow:none}
  .nav-idx{font-size:11px}
}

@media (max-width:640px){
  .grid--2{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:22px}
  .footer-top{align-items:flex-start}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .btn:hover{transform:none}
  .link-more:hover::after{transform:none}
}