/* ============================================================
   /assets/site.css — MANXBET 万博体育 共享外壳与基础组件
   纵向叙事长卷 · 左右分置导航 · 暖沙/冷青/橙金三段色彩节奏
   ============================================================ */

:root{
  --sand:#F3E7D3;
  --sand-deep:#E3CFB0;
  --card:#FBF5EA;
  --teal-dark:#123F3D;
  --teal:#1F6F6A;
  --teal-mist:#8FBCB6;
  --amber:#E8871E;
  --amber-deep:#B45C05;
  --ink:#1B1512;
  --brass:#C9A227;
  --muted:#5D6B62;

  --line-brass:rgba(201,162,39,.42);
  --line-brass-soft:rgba(201,162,39,.26);
  --line-teal:rgba(18,63,61,.16);
  --paper-shadow:0 1px 0 rgba(18,63,61,.06);

  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --header-h:78px;
  --radius:2px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:104px}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}
:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--amber-deep);
  outline-offset:3px;
  border-radius:var(--radius);
}

/* ---------- base ---------- */
body{
  min-height:100vh;
  background:var(--sand);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.05;
  background-image:radial-gradient(rgba(27,21,18,.85) .5px,transparent .6px);
  background-size:3px 3px;
}
main{display:block}
#main-content{scroll-margin-top:104px}
::selection{background:rgba(232,135,30,.3);color:var(--ink)}

@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-70px;
  z-index:120;
  padding:10px 18px;
  background:var(--teal-dark);
  color:#F4EADA;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  border:1px solid var(--brass);
  transition:top .2s ease;
}
.skip-link:focus{top:14px}

/* ============================================================
   头部：左署名 / 金线 / 右栏目索引；滚动后收缩
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(243,231,211,.96);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line-brass);
  transition:background .22s ease,box-shadow .22s ease;
}
.site-header[data-condensed]{
  background:rgba(243,231,211,.99);
  box-shadow:0 10px 26px rgba(18,63,61,.1);
}
.header-frame{
  position:relative;
  width:min(1320px,100% - 40px);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,26px);
  min-height:var(--header-h);
  padding-block:10px;
  transition:min-height .24s ease;
}
.site-header[data-condensed] .header-frame{min-height:62px}

/* 品牌署名 */
.brand-mark{
  display:flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
}
.brand-mark__sigil{
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  border:1px solid var(--brass);
  border-radius:var(--radius);
  background:linear-gradient(150deg,var(--teal-dark) 0%,#0B2B2A 100%);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  box-shadow:inset 0 0 0 1px rgba(243,231,211,.16);
}
.brand-mark__text{display:flex;flex-direction:column;line-height:1.3}
.brand-mark__name{
  font-size:16px;
  font-weight:800;
  letter-spacing:.06em;
  color:var(--teal-dark);
  white-space:nowrap;
}
.brand-mark__meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
}
.header-rule{
  flex:0 0 1px;
  width:1px;
  height:30px;
  background:linear-gradient(180deg,transparent,var(--brass),transparent);
}

/* 导航 */
.primary-nav{margin-inline-start:auto}
.primary-nav__list{
  display:flex;
  flex-wrap:nowrap;
  align-items:center;
  gap:2px;
}
.primary-nav__item{display:flex}
.nav-link{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:9px 11px;
  border:1px solid transparent;
  border-radius:var(--radius);
  color:var(--teal-dark);
  transition:background .12s ease,border-color .12s ease,color .12s ease;
}
.nav-link__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.nav-link__label{
  font-size:15px;
  font-weight:500;
  letter-spacing:.03em;
  white-space:nowrap;
}
.nav-link:hover{
  background:rgba(251,245,234,.92);
  border-color:rgba(143,188,182,.9);
  color:var(--teal-dark);
}
.nav-link[aria-current="page"]{
  background:var(--card);
  border-color:rgba(232,135,30,.55);
  box-shadow:inset 0 -2px 0 var(--amber);
}
.nav-link[aria-current="page"] .nav-link__num{color:var(--amber-deep)}
.nav-link[aria-current="page"] .nav-link__label{font-weight:700}

/* 收缩态右端状态 */
.header-status{
  display:none;
  align-items:center;
  gap:10px;
  margin-inline-start:10px;
  padding-left:12px;
  border-left:1px solid var(--line-brass);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--teal-dark);
  white-space:nowrap;
}
.header-status__num{
  padding:2px 6px;
  background:var(--amber);
  color:#231205;
  font-size:11px;
  letter-spacing:.06em;
}
@media (min-width:1100px){
  .site-header[data-condensed] .header-status{display:flex}
}

/* 移动索引按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-inline-start:auto;
  padding:9px 14px;
  border:1px solid rgba(18,63,61,.35);
  border-radius:var(--radius);
  background:var(--card);
  color:var(--teal-dark);
  font-size:14px;
  font-weight:500;
  letter-spacing:.06em;
  transition:background .12s ease,border-color .12s ease;
}
.nav-toggle:hover{border-color:var(--teal);background:#fff}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  transition:background .2s ease;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .2s ease;
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.site-header[data-open] .nav-toggle{border-color:var(--amber);background:var(--sand-deep)}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* 滚动进度 */
.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(18,63,61,.08);
  pointer-events:none;
}
.header-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--teal) 0%,var(--brass) 60%,var(--amber) 100%);
  transition:width .1s linear;
}

/* 移动端：横向可滑动索引条 */
@media (max-width:979px){
  .header-rule,
  .header-status{display:none}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    background:var(--sand-deep);
    border-bottom:1px solid var(--line-brass);
    box-shadow:0 18px 32px rgba(18,63,61,.16);
    padding:12px 0 16px;
  }
  .site-header[data-open] .primary-nav{display:block}
  .primary-nav__list{
    gap:8px;
    overflow-x:auto;
    overscroll-behavior-x:contain;
    scroll-snap-type:x proximity;
    -webkit-overflow-scrolling:touch;
    padding:2px 20px 8px;
  }
  .primary-nav__item{flex:0 0 auto;scroll-snap-align:center}
  .nav-link{
    gap:8px;
    padding:10px 14px;
    background:var(--card);
    border-color:rgba(18,63,61,.22);
  }
  .nav-link__label{font-size:15px}
  .nav-link[aria-current="page"]{border-color:rgba(232,135,30,.7)}
}

/* ============================================================
   页脚：四段式，冷青深底 + 磨砂金细线
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,104px);
  background:var(--teal-dark);
  color:#F4EADA;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:6px;
  background:linear-gradient(90deg,var(--amber) 0%,var(--brass) 42%,var(--teal-mist) 100%);
}
.footer-frame{
  width:min(1320px,100% - 40px);
  margin-inline:auto;
  padding-block:clamp(40px,5vw,60px) 26px;
}
.footer-top{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 22px;
  padding-bottom:24px;
  border-bottom:1px solid var(--line-brass);
}
.footer-brand{
  font-size:clamp(20px,2.4vw,26px);
  font-weight:800;
  letter-spacing:.08em;
  color:#FBF5EA;
}
.footer-tagline{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(244,234,218,.72);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(22px,3vw,38px);
  padding-block:32px;
  border-bottom:1px solid var(--line-brass);
}
.footer-col{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding-left:18px;
  border-left:1px solid var(--line-brass-soft);
}
.footer-heading{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.2em;
  color:var(--brass);
}
.footer-list{display:grid;gap:8px}
.footer-link{
  font-size:15px;
  letter-spacing:.02em;
  color:#F4EADA;
  border-bottom:1px solid transparent;
  transition:color .12s ease,border-color .12s ease;
}
.footer-link:hover{color:var(--amber);border-bottom-color:var(--amber)}
.contact-list{display:grid;gap:12px;font-size:15px}
.contact-list__key{
  display:block;
  margin-bottom:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--teal-mist);
}
.contact-list__value{
  display:block;
  color:#FBF5EA;
  line-height:1.5;
  overflow-wrap:anywhere;
}
.footer-note{
  max-width:32em;
  font-size:13px;
  line-height:1.7;
  color:rgba(244,234,218,.7);
  border-left:1px solid var(--line-brass-soft);
  padding-left:12px;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:baseline;
  gap:8px 20px;
  padding-top:22px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(244,234,218,.66);
}
.footer-legal{color:rgba(244,234,218,.8)}

/* ============================================================
   版式与布局工具
   ============================================================ */
.shell{
  width:min(var(--shell),100% - var(--gutter) * 2);
  margin-inline:auto;
}
.band{padding-block:clamp(44px,6.5vw,84px)}
.band--deep{background:var(--sand-deep)}
.band--card{background:var(--card)}
.band--teal{background:var(--teal-dark);color:#F4EADA}
.band--teal :where(.section__title,.lede,.prose){color:#FBF5EA}

.tape{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 16px;
  padding:10px var(--gutter);
  background:var(--sand-deep);
  border-block:1px solid var(--line-brass);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--teal-dark);
}

.divider-rule{
  height:1px;
  border:0;
  margin-block:clamp(24px,4vw,48px);
  background:linear-gradient(90deg,transparent,var(--line-brass),transparent);
}

.section__head{
  display:grid;
  gap:8px;
  margin-bottom:clamp(22px,3vw,34px);
  padding-top:16px;
  border-top:1px solid var(--line-teal);
}
.section__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--amber-deep);
  font-variant-numeric:tabular-nums;
}
.section__title{
  font-size:clamp(1.5rem,2.7vw,2.125rem);
  font-weight:800;
  line-height:1.3;
  letter-spacing:.04em;
  color:var(--teal-dark);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--muted);
}
.lede{
  max-width:34em;
  font-size:clamp(17px,1.4vw,19px);
  line-height:1.7;
  color:#2A211C;
}
.prose{
  max-width:38em;
  font-size:17px;
  line-height:1.75;
}
.prose p + p{margin-top:1em}
.prose ul,.prose ol{
  margin-top:.8em;
  padding-left:1.2em;
  list-style:disc;
}
.prose li + li{margin-top:.4em}
.prose a{
  color:var(--teal);
  border-bottom:1px solid rgba(31,111,106,.42);
  transition:color .12s ease,border-color .12s ease;
}
.prose a:hover{color:var(--amber-deep);border-bottom-color:var(--amber-deep)}
.prose strong{font-weight:700;color:var(--teal-dark)}

.grid{display:grid;gap:clamp(18px,3vw,32px)}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.grid--04-08{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
.grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}
.stack{display:grid;gap:16px}

/* ============================================================
   通用按钮
   ============================================================ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:15px;
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.4;
  transition:background .14s ease,color .14s ease,border-color .14s ease;
}
.btn--primary{
  background:var(--amber);
  color:#231205;
  border-color:var(--amber-deep);
  box-shadow:0 6px 18px rgba(180,92,5,.22);
}
.btn--primary:hover{background:var(--amber-deep);color:#FFF6E7}
.btn--ghost{
  background:transparent;
  color:var(--teal-dark);
  border-color:rgba(18,63,61,.4);
}
.btn--ghost:hover{background:var(--card);border-color:var(--teal)}
.btn--link{
  padding:0;
  gap:6px;
  border:0;
  color:var(--teal);
  border-bottom:1px solid rgba(31,111,106,.42);
  border-radius:0;
}
.btn--link:hover{color:var(--amber-deep);border-bottom-color:var(--amber-deep)}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:6px}
.breadcrumb__link{
  color:var(--teal);
  border-bottom:1px solid rgba(31,111,106,.35);
  transition:color .12s ease,border-color .12s ease;
}
.breadcrumb__link:hover{color:var(--amber-deep);border-bottom-color:var(--amber-deep)}
.breadcrumb__sep{color:rgba(93,107,98,.6)}
.breadcrumb__item[aria-current="page"]{color:var(--ink)}

/* ============================================================
   资料卡 / 标签 / 元信息
   ============================================================ */
.card{
  background:var(--card);
  border:1px solid var(--line-brass);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,26px);
  box-shadow:var(--paper-shadow);
}
.card__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
  padding-bottom:10px;
  margin-bottom:12px;
  border-bottom:1px solid var(--line-teal);
}
.card__title{
  font-size:17px;
  font-weight:700;
  letter-spacing:.03em;
  color:var(--teal-dark);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  border:1px solid rgba(143,188,182,.9);
  border-radius:var(--radius);
  background:rgba(143,188,182,.16);
  color:var(--teal-dark);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}
.tag--amber{
  border-color:rgba(232,135,30,.75);
  background:rgba(232,135,30,.12);
  color:var(--amber-deep);
}
.meta-line{
  display:flex;
  flex-wrap:wrap;
  gap:4px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}

/* ============================================================
   图片容器（页面阶段放置占位）
   ============================================================ */
.media-frame{
  --media-ratio:16 / 9;
  position:relative;
  aspect-ratio:var(--media-ratio);
  overflow:hidden;
  background:var(--sand-deep);
  border:1px solid var(--line-brass);
  border-radius:var(--radius);
  box-shadow:var(--paper-shadow);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:6px;
  border:1px solid rgba(251,245,234,.42);
  pointer-events:none;
}
.media-frame > img,
.media-frame > svg,
.media-frame > video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame[data-ratio="21x9"]{--media-ratio:21 / 9}
.media-frame[data-ratio="16x9"]{--media-ratio:16 / 9}
.media-frame[data-ratio="4x3"]{--media-ratio:4 / 3}
.media-frame[data-ratio="1x1"]{--media-ratio:1 / 1}
.media-frame[data-ratio="3x4"]{--media-ratio:3 / 4}
.media-frame--placeholder{
  display:grid;
  place-items:center;
  background-image:
    repeating-linear-gradient(135deg,rgba(18,63,61,.07) 0 1px,transparent 1px 12px),
    linear-gradient(160deg,var(--sand-deep) 0%,#EFE1C8 100%);
}
.media-frame__label{
  position:relative;
  z-index:1;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:rgba(18,63,61,.6);
  text-align:center;
  padding:0 12px;
}
.media-frame__caption{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}

/* ============================================================
   分段切换标签页
   ============================================================ */
.tabs{border-top:1px solid var(--line-teal)}
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  border-bottom:1px solid var(--line-teal);
}
.tabs__tab{
  position:relative;
  padding:12px 16px;
  border:1px solid transparent;
  border-bottom:0;
  border-radius:var(--radius) var(--radius) 0 0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--muted);
  transition:background .12s ease,color .12s ease,border-color .12s ease;
}
.tabs__tab:hover{color:var(--teal-dark);background:rgba(251,245,234,.72)}
.tabs__tab[aria-selected="true"]{
  color:var(--teal-dark);
  background:var(--card);
  border-color:var(--line-brass);
  box-shadow:inset 0 2px 0 var(--amber);
}
.tabs__panel{padding-top:22px}
.tabs__panel[hidden]{display:none}

/* ============================================================
   滚动显现
   ============================================================ */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1023px){
  .grid--split,
  .grid--04-08{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:900px){
  .grid--three{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col:nth-child(3){grid-column:1 / -1;border-left:0;padding-left:0;padding-top:22px;border-top:1px solid var(--line-brass-soft)}
}
@media (max-width:720px){
  body{font-size:16px}
  .header-frame{width:calc(100% - 28px)}
  .brand-mark__name{font-size:15px}
  .brand-mark__meta{font-size:11px;letter-spacing:.1em}
  .brand-mark__sigil{width:32px;height:32px}
  .footer-frame{width:calc(100% - 28px)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .footer-col{padding-left:0;border-left:0;padding-top:20px;border-top:1px solid var(--line-brass-soft)}
  .footer-col:first-child{padding-top:0;border-top:0}
  .footer-col:nth-child(3){padding-top:20px;border-top:1px solid var(--line-brass-soft)}
  .grid--three{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{justify-content:flex-start}
}
@media (max-width:420px){
  .nav-toggle__text{display:none}
  .nav-toggle{padding:10px 12px}
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .skip-link{transition:none}
}