/* ============================================================
   易胜博平台 · 共享样式表 /assets/site.css
   东方现代主义：深墨蓝基底 + 鎏金细线 + 朱砂节点 + 青瓷提示
   ============================================================ */

/* ---------- 01 · 变量 ---------- */
:root{
  --ink-900:#0B1B2B;
  --ink-700:#14324F;
  --gold-500:#C8A24A;
  --gold-300:#E8CF8E;
  --cinnabar:#B73A32;
  --cinnabar-dark:#96302A;
  --celadon:#5F9E8F;
  --paper-100:#F6F1E7;
  --graphite:#242A31;
  --mist:#8FA6B8;
  --paper-gray:#E4E0D6;

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

  --maxw:1360px;
  --gutter:clamp(16px,4vw,48px);
  --header-h:74px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 02 · 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}
body{
  margin:0;
  background:var(--paper-100);
  color:var(--graphite);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit}
a{color:inherit}
table{border-collapse:collapse;width:100%}
::selection{background:var(--gold-500);color:var(--ink-900)}
:focus-visible{outline:2px solid var(--gold-300);outline-offset:3px;border-radius:2px}

/* ---------- 03 · 中文排版 ---------- */
h1,h2,h3,h4,h5{
  margin:0 0 .55em;
  font-family:var(--font-serif);
  font-weight:900;
  color:var(--ink-900);
  line-height:1.14;
  letter-spacing:.01em;
}
h1{font-size:clamp(2.5rem,6vw,5.6rem);line-height:1.02;letter-spacing:-.015em}
h2{font-size:clamp(1.8rem,3vw,3rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.55rem)}
h4{font-size:1.06rem}
p,ul,ol,dl,figure,blockquote{margin:0 0 1.1em}
ul,ol{padding-left:1.25em}
p:last-child,ul:last-child,ol:last-child{margin-bottom:0}
li{margin:.25em 0}
strong{color:var(--ink-900);font-weight:700}
p,li{max-width:72ch}

/* ---------- 04 · 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:300;
  padding:10px 18px;
  font:500 14px/1 var(--font-sans);
  color:var(--ink-900);
  background:var(--gold-500);
  text-decoration:none;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 05 · 头部 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  padding:clamp(10px,1.5vw,18px) clamp(12px,2.6vw,32px);
  background-image:linear-gradient(180deg,rgba(11,27,43,.94) 0%,rgba(11,27,43,.60) 58%,rgba(11,27,43,0) 100%);
  background-color:transparent;
  transition:background-color .35s var(--ease),padding .35s var(--ease),box-shadow .35s var(--ease);
}
.site-header[data-scrolled]{
  background-image:none;
  background-color:var(--ink-900);
  padding-block:7px;
  box-shadow:0 1px 0 rgba(200,162,74,.42),0 18px 44px -32px #000;
}
.header-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,28px);
  padding:6px clamp(8px,1.2vw,16px);
  border:1px solid transparent;
  border-radius:999px;
  transition:border-color .35s var(--ease),background-color .35s var(--ease);
}
.site-header[data-scrolled] .header-inner{
  border-color:rgba(200,162,74,.32);
  background-color:rgba(20,50,79,.55);
}

/* 品牌 / 印玺 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--paper-100);
  text-decoration:none;
}
.brand-seal{
  width:40px;height:40px;
  display:grid;place-items:center;
  font-family:var(--font-serif);
  font-weight:900;
  font-size:19px;
  line-height:1;
  color:var(--ink-900);
  background:linear-gradient(140deg,var(--gold-300),var(--gold-500));
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  transition:transform .3s var(--ease);
}
.brand:hover .brand-seal{transform:translateY(-2px) rotate(-3deg)}
.brand-text{display:block;min-width:0}
.brand-name{
  display:block;
  font-family:var(--font-serif);
  font-weight:900;
  font-size:18px;
  line-height:1.2;
  letter-spacing:.06em;
  color:var(--paper-100);
}
.brand-line{
  display:block;
  margin-top:2px;
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1.3;
  letter-spacing:.22em;
  color:var(--gold-300);
}

/* 导航 */
.site-nav{margin-left:auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(2px,.9vw,8px);
  margin:0;padding:0;
  list-style:none;
}
.nav-list li{margin:0}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 11px;
  font-size:14.5px;
  letter-spacing:.07em;
  color:rgba(246,241,231,.82);
  text-decoration:none;
  transition:color .25s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:11px;right:11px;bottom:3px;
  height:2px;
  background:var(--gold-500);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease),background-color .3s var(--ease);
}
.nav-link:hover{color:var(--gold-300)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--gold-300)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--cinnabar)}

/* 右侧动作区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.header-note{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
  white-space:nowrap;
}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  width:44px;height:44px;
  padding:0;
  place-items:center;
  border:1px solid rgba(200,162,74,.5);
  border-radius:50%;
  background:rgba(11,27,43,.55);
  cursor:pointer;
  transition:border-color .25s var(--ease),background-color .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-300)}
.nav-toggle-bar{
  position:relative;
  display:block;
  width:18px;height:2px;
  background:var(--gold-300);
  transition:background-color .2s var(--ease);
}
.nav-toggle-bar::before,
.nav-toggle-bar::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:var(--gold-300);
  transition:transform .28s var(--ease),top .28s var(--ease);
}
.nav-toggle-bar::before{top:-6px}
.nav-toggle-bar::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after{top:0;transform:rotate(-45deg)}

/* 阅读进度 */
.scroll-progress{
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:linear-gradient(90deg,var(--gold-500),var(--cinnabar));
  transition:width .12s linear;
}

/* ---------- 06 · 按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:13px 22px;
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:500;
  line-height:1;
  letter-spacing:.04em;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  transition:background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-primary{background:var(--cinnabar);color:#fff}
.btn-primary:hover{background:var(--cinnabar-dark);color:#fff}
.btn-ghost{background:transparent;border-color:rgba(232,207,142,.6);color:var(--gold-300)}
.btn-ghost:hover{background:rgba(200,162,74,.14);border-color:var(--gold-300)}
.btn-outline{background:transparent;border-color:var(--ink-700);color:var(--ink-700)}
.btn-outline:hover{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper-100)}
.btn-label-short{display:none}

/* ---------- 07 · 页面骨架 ---------- */
#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 16px)}
.container{
  width:min(100% - (var(--gutter) * 2),var(--maxw));
  margin-inline:auto;
}
.section{padding-block:clamp(48px,7vw,104px)}
.section--paper{background:var(--paper-100)}
.section--ink{background:var(--ink-900);color:var(--paper-100)}
.section--ink h2,
.section--ink h3,
.section--ink h4{color:var(--paper-100)}
.section--ink p,
.section--ink li{color:rgba(246,241,231,.82)}

/* ---------- 08 · 网格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.2vw,32px);
}
.col-1{grid-column:span 1}
.col-2{grid-column:span 2}
.col-3{grid-column:span 3}
.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-9{grid-column:span 9}
.col-10{grid-column:span 10}
.col-12{grid-column:span 12}

/* ---------- 09 · 标题与标签 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--gold-500);
}
.eyebrow::before{
  content:"";
  width:26px;height:2px;
  background:var(--gold-500);
}
.eyebrow-num{color:var(--cinnabar);font-weight:700}
.section--ink .eyebrow{color:var(--gold-300)}
.label-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:4px 12px 4px 9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--ink-700);
  background:rgba(200,162,74,.16);
  border-left:2px solid var(--gold-500);
}
.display{font-size:clamp(2.5rem,6vw,5.6rem);line-height:1.02;letter-spacing:-.015em}
.display--md{font-size:clamp(1.8rem,3vw,3rem);line-height:1.14}
.lead{
  font-size:clamp(1.02rem,1.3vw,1.18rem);
  line-height:1.85;
  color:#3a4753;
  max-width:62ch;
}
.section--ink .lead{color:rgba(246,241,231,.86)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 10 · 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:18px 0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:#5d6b78;
}
.breadcrumb li{display:flex;align-items:center;gap:8px;margin:0;max-width:none}
.breadcrumb li + li::before{content:"/";color:var(--gold-500)}
.breadcrumb a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cinnabar)}
.breadcrumb [aria-current="page"]{color:var(--ink-900);font-weight:500}

/* ---------- 11 · 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  background:linear-gradient(160deg,var(--ink-700),var(--ink-900));
}
.media-frame img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .8s var(--ease);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(205deg,rgba(200,162,74,.18),rgba(11,27,43,0) 52%);
}
.media-frame:hover img{transform:scale(1.04)}
.ratio-16x9{aspect-ratio:16/9}
.ratio-4x3{aspect-ratio:4/3}
.ratio-1x1{aspect-ratio:1/1}
.ratio-21x9{aspect-ratio:21/9}
.media-frame--cut{clip-path:polygon(0 0,calc(100% - 30px) 0,100% 30px,100% 100%,0 100%)}
.media-caption{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--mist);
}

/* ---------- 12 · 显现动效 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js-reveal [data-reveal]{opacity:1;transform:none;transition:none}
}

/* ---------- 13 · 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,88px);
  padding-top:clamp(44px,5vw,72px);
  background:linear-gradient(180deg,var(--ink-900) 0%,#081420 100%);
  color:var(--mist);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:3px;
  background:linear-gradient(90deg,var(--gold-500),var(--cinnabar) 52%,var(--celadon));
}
.footer-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(28px,4vw,64px);
  align-items:start;
}
.footer-brand{min-width:0}
.brand--footer{margin-bottom:20px}
.footer-summary{
  max-width:46ch;
  font-size:15px;
  line-height:1.85;
  color:rgba(246,241,231,.74);
}
.footer-contact{
  margin:24px 0 0;
  display:grid;
  gap:9px;
  font-family:var(--font-mono);
  font-size:13px;
}
.contact-item{
  display:flex;
  gap:12px;
  align-items:baseline;
  margin:0;
}
.contact-label{
  flex:0 0 auto;
  min-width:66px;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gold-500);
}
.contact-value{
  margin:0;
  color:var(--paper-100);
  word-break:break-word;
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(20px,3vw,44px);
}
.footer-col{min-width:0}
.footer-col-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--gold-300);
}
.footer-list{
  margin:0;
  padding:0;
  list-style:none;
}
.footer-list li{margin:0;max-width:none}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 0;
  font-size:15px;
  color:var(--mist);
  text-decoration:none;
  transition:color .22s var(--ease);
}
.footer-link::before{
  content:"";
  width:12px;height:1px;
  background:var(--gold-500);
  opacity:.55;
  transition:width .26s var(--ease),opacity .26s var(--ease);
}
.footer-link:hover{color:var(--paper-100)}
.footer-link:hover::before{width:22px;opacity:1}
.footer-link[aria-current="page"]{color:var(--gold-300)}
.footer-legal{
  max-width:var(--maxw);
  margin:clamp(32px,4vw,56px) auto 0;
  padding:18px var(--gutter) 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  border-top:1px solid rgba(143,166,184,.22);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.legal-nav{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  margin:0;
  padding:0;
  list-style:none;
}
.legal-nav li{margin:0;max-width:none}
.legal-link{
  color:var(--mist);
  text-decoration:none;
  transition:color .22s var(--ease);
}
.legal-link:hover{color:var(--gold-300)}
.footer-copy{margin:0;color:rgba(143,166,184,.85);max-width:none}
.legal-icp{margin:0;color:var(--gold-500);max-width:none}

/* ---------- 14 · 响应式 ---------- */
@media (max-width:1040px){
  .nav-toggle{display:grid}
  .header-note{display:none}
  .site-nav{
    position:fixed;
    left:12px;right:12px;bottom:12px;
    z-index:130;
    margin:0;
    padding:14px;
    max-height:70vh;
    overflow-y:auto;
    background:var(--ink-900);
    border:1px solid rgba(200,162,74,.36);
    border-radius:18px;
    box-shadow:0 34px 70px -34px #000;
    transform:translateY(calc(100% + 24px));
    opacity:0;
    visibility:hidden;
    transition:transform .34s var(--ease),opacity .24s var(--ease),visibility .34s linear;
  }
  .site-header[data-open] .site-nav{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:15px 12px;
    font-size:16px;
    border-bottom:1px solid rgba(246,241,231,.09);
  }
  .nav-list li:last-child .nav-link{border-bottom:0}
  .nav-link::after{left:12px;right:12px;bottom:6px}
}

@media (max-width:900px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-1,.col-2,.col-3,.col-4,.col-5,.col-7,.col-8,.col-9,.col-10,.col-12{grid-column:1 / -1}
  .col-6{grid-column:span 3}
  .footer-inner{grid-template-columns:1fr}
}

@media (max-width:760px){
  .btn-label-full{display:none}
  .btn-label-short{display:inline}
  .brand-line{display:none}
  .brand-seal{width:36px;height:36px;font-size:17px}
  .brand-name{font-size:16.5px}
}

@media (max-width:560px){
  body{font-size:16px}
  .header-inner{gap:8px}
  .btn-sm{padding:9px 12px;font-size:13px}
  .footer-nav{grid-template-columns:1fr;gap:22px}
  .contact-item{flex-direction:column;gap:2px}
  .contact-label{min-width:0}
  .footer-legal{font-size:11.5px;justify-content:flex-start}
  .col-6{grid-column:1 / -1}
}

/* ---------- 15 · 动效可访问性 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
}