/* ============ 博胜指南 · 共享样式 /assets/site.css ============ */

/* ---------- reset ---------- */
*,
*::before,
*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{ margin:0; }
ul,ol{ margin:0; padding:0; list-style:none; }
img,svg,video,canvas{ display:block; max-width:100%; }
button{ font:inherit; color:inherit; background:none; border:0; padding:0; cursor:pointer; }
a{ color:inherit; text-decoration:none; }
main{ display:block; }

/* ---------- tokens ---------- */
:root{
  --ink:#0E0E0F;
  --ink-2:#1C1D1F;
  --paper:#F7F5F1;
  --white:#FFFFFF;
  --orange:#FF5A1F;
  --orange-deep:#C43C0C;
  --orange-soft:rgba(255,90,31,.08);
  --slate:#7F8C8D;
  --slate-100:#DCE1E1;
  --sand:#E7E1D6;

  --line:rgba(14,14,15,.12);
  --line-strong:rgba(14,14,15,.26);
  --line-dark:rgba(247,245,241,.16);
  --on-dark:#EDEAE4;

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

  --max:1240px;
  --pad:24px;
  --sp:8px;
  --ease:cubic-bezier(.4,0,.2,1);
}

@media (max-width:640px){
  :root{ --pad:18px; }
}

/* ---------- 中文基础排版 ---------- */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}

body,
.prose p{
  text-wrap:pretty;
}

h1,h2,h3,h4{
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
}

h1{ font-size:clamp(34px,4.4vw,56px); font-weight:900; letter-spacing:-.02em; line-height:1.1; }
h2{ font-size:32px; }
h3{ font-size:22px; }

p{ line-height:1.75; }

::selection{
  background:var(--orange);
  color:#fff;
}

:focus-visible{
  outline:2px solid var(--orange);
  outline-offset:3px;
}

.site-foot :focus-visible{
  outline-color:var(--orange);
}

/* ---------- 通用工具 ---------- */
.container{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.mono{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--slate);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:14px;
  height:2px;
  background:var(--orange);
  flex:none;
}

.rule{
  height:1px;
  border:0;
  background:var(--line);
  margin-block:24px;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--mono);
  font-size:12px;
  line-height:1.4;
  letter-spacing:.04em;
  padding:4px 8px;
  border:1px solid var(--line-strong);
  background:var(--white);
  color:var(--slate);
}
.tag--orange{
  color:var(--orange-deep);
  border-color:rgba(196,60,12,.32);
  background:var(--orange-soft);
}

.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:300;
  padding:10px 16px;
  font-size:14px;
  font-weight:700;
  background:var(--ink);
  color:var(--paper);
  border-bottom:2px solid var(--orange);
  transform:translateY(-220%);
  transition:transform .16s var(--ease);
}
.skip-link:focus-visible{
  transform:translateY(0);
  outline-color:var(--orange);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--sans);
  font-size:15px;
  font-weight:700;
  line-height:1;
  letter-spacing:0;
  padding:14px 20px;
  border:1px solid var(--ink);
  background:var(--ink);
  color:var(--paper);
  text-align:center;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn:hover{
  background:var(--orange);
  border-color:var(--orange);
  color:#fff;
}
.btn--sm{
  font-size:14px;
  padding:11px 16px;
}
.btn--primary{ background:var(--ink); border-color:var(--ink); color:var(--paper); }
.btn--ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--ink);
}
.btn--ghost:hover{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper);
}
.btn--orange{ background:var(--orange); border-color:var(--orange); color:#fff; }
.btn--orange:hover{ background:var(--orange-deep); border-color:var(--orange-deep); color:#fff; }

/* 低语式文字链接：下划线由 1px 增到 2px 并转橙 */
.link-quiet{
  display:inline-block;
  font-size:14px;
  color:var(--ink);
  padding-bottom:2px;
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;
  background-position:0 100%;
  background-size:100% 1px;
  transition:color .16s var(--ease),background-size .16s var(--ease);
}
.link-quiet:hover{
  color:var(--orange-deep);
  background-size:100% 2px;
}

/* ---------- 页头：刊头 ---------- */
.masthead{
  position:relative;
  z-index:60;
  background:var(--paper);
  border-top:4px solid var(--ink);
  border-bottom:1px solid var(--line);
}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:0 50%;
  z-index:80;
  pointer-events:none;
}

.masthead__bar{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:24px;
  padding-block:20px 18px;
}

.masthead__meta{
  display:flex;
  flex-direction:column;
  gap:5px;
  min-width:0;
  justify-self:start;
}

.masthead__wordmark{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--slate);
  transition:color .16s var(--ease);
}
.masthead__wordmark::before{
  content:"";
  width:8px;
  height:8px;
  background:var(--orange);
  flex:none;
}
.masthead__wordmark:hover{ color:var(--ink); }

.masthead__edition{
  color:var(--slate);
  font-size:12px;
  letter-spacing:.02em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.masthead__plate{
  justify-self:center;
  font-family:var(--sans);
  font-weight:900;
  font-size:clamp(24px,2.6vw,32px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--ink);
  white-space:nowrap;
  padding-bottom:4px;
  background-image:linear-gradient(var(--ink),var(--ink));
  background-repeat:no-repeat;
  background-position:50% 100%;
  background-size:18px 2px;
  transition:background-size .18s var(--ease),color .16s var(--ease);
}
.masthead__plate:hover{
  color:var(--ink-2);
  background-image:linear-gradient(var(--orange),var(--orange));
  background-size:100% 2px;
}

.masthead__acts{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:16px;
  justify-self:end;
}

/* 抽屉开关 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  border:1px solid var(--line-strong);
  color:var(--ink);
  font-size:13px;
  font-weight:700;
  line-height:1;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{ border-color:var(--orange); color:var(--orange-deep); }
.nav-toggle__box{
  display:grid;
  gap:5px;
  width:18px;
}
.nav-toggle__line{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .16s var(--ease),opacity .16s var(--ease);
}
.nav-toggle__text{ letter-spacing:.06em; }

.masthead[data-open] .nav-toggle__line:first-child{ transform:translateY(3.5px) rotate(45deg); }
.masthead[data-open] .nav-toggle__line:last-child{ transform:translateY(-3.5px) rotate(-45deg); }

/* 导航条 */
.navrow{
  border-top:1px solid var(--line);
  background:var(--paper);
}

.navrow__list{
  display:flex;
  align-items:center;
  gap:2px;
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--pad);
  overflow-x:auto;
  scrollbar-width:none;
}
.navrow__list::-webkit-scrollbar{ display:none; }

.navrow__item{ flex:none; }

.navrow__link{
  position:relative;
  display:inline-block;
  padding:13px 14px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  white-space:nowrap;
  transition:color .16s var(--ease);
}
.navrow__link::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:0;
  height:2px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .18s var(--ease);
}
.navrow__link:hover{ color:var(--orange-deep); }
.navrow__link:hover::after{ transform:scaleX(1); }
.navrow__link[aria-current="page"]{
  font-weight:700;
  color:var(--ink);
}
.navrow__link[aria-current="page"]::after{ transform:scaleX(1); }

/* ---------- 页脚 ---------- */
.site-foot{
  margin-top:80px;
  background:var(--ink);
  color:var(--on-dark);
  border-top:3px solid var(--orange);
}

.site-foot__inner{
  padding-block:56px 28px;
}

.site-foot__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 24px;
  padding-bottom:18px;
  margin-bottom:36px;
  border-bottom:1px solid var(--line-dark);
}

.site-foot__brand{
  font-family:var(--sans);
  font-weight:900;
  font-size:22px;
  letter-spacing:-.01em;
  color:#fff;
  transition:color .16s var(--ease);
}
.site-foot__brand:hover{ color:var(--orange); }

.site-foot__line{
  color:var(--slate-100);
  font-size:12px;
  letter-spacing:.06em;
}

.foot-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:40px 32px;
}

.foot-col{ min-width:0; }

.foot-col__title{
  font-family:var(--mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.16em;
  color:var(--slate-100);
  padding-bottom:10px;
  margin-bottom:16px;
  border-bottom:1px solid var(--line-dark);
}

.foot-list li + li{ margin-top:8px; }

.foot-link{
  display:inline-block;
  font-size:15px;
  color:var(--on-dark);
  padding-bottom:1px;
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;
  background-position:0 100%;
  background-size:0 1px;
  transition:color .16s var(--ease),background-size .16s var(--ease);
}
.foot-link:hover{
  color:var(--orange);
  background-size:100% 1px;
}

.foot-note{
  font-size:14px;
  line-height:1.7;
  color:rgba(237,234,228,.72);
  overflow-wrap:anywhere;
}
.foot-note + .foot-note{ margin-top:10px; }
.foot-col .foot-list + .foot-note{ margin-top:14px; }

.foot-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  margin-top:44px;
  padding:16px 20px;
  background:rgba(247,245,241,.05);
  border:1px solid var(--line-dark);
  border-left:3px solid var(--orange);
}

.foot-bar__text{
  font-size:14px;
  line-height:1.7;
  color:var(--on-dark);
  max-width:70ch;
}

.foot-bar__link{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--orange);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.foot-bar__link:hover{
  color:#fff;
  border-bottom-color:var(--orange);
}

.foot-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid var(--line-dark);
}

.foot-base__copy{
  font-size:13px;
  color:rgba(237,234,228,.66);
}

.foot-base__links{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
}
.foot-base__links a{
  font-size:13px;
  color:rgba(237,234,228,.66);
  transition:color .16s var(--ease);
}
.foot-base__links a:hover{ color:var(--orange); }

/* ---------- 页面容器与节奏 ---------- */
.page-head{
  padding-block:40px 30px;
  border-bottom:1px solid var(--line);
}
.page-head h1{ margin-bottom:14px; }
.page-head p{ max-width:60ch; color:var(--ink-2); }

.section{ padding-block:64px; }
.section--tight{ padding-block:40px; }

.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 24px;
  margin-bottom:28px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}

/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--slate);
  margin-bottom:18px;
}
.breadcrumb a{
  color:var(--slate);
  transition:color .16s var(--ease);
}
.breadcrumb a:hover{ color:var(--orange-deep); }
.breadcrumb__sep{
  padding-inline:8px;
  color:var(--slate-100);
}

/* 正文 */
.prose{
  max-width:66ch;
  font-size:17px;
  line-height:1.75;
}
.prose > * + *{ margin-top:1em; }
.prose h2{
  font-size:32px;
  margin-top:2em;
  padding-top:.6em;
  border-top:1px solid var(--line);
}
.prose h3{
  font-size:22px;
  margin-top:1.6em;
}
.prose ul{
  padding-left:0;
}
.prose li{
  position:relative;
  padding-left:22px;
}
.prose li + li{ margin-top:.55em; }
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:10px;
  height:2px;
  background:var(--orange);
}
.prose a{
  color:var(--orange-deep);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  transition:text-decoration-thickness .16s var(--ease);
}
.prose a:hover{ text-decoration-thickness:2px; }
.prose strong{ font-weight:700; }
.prose blockquote{
  border-left:3px solid var(--orange);
  padding:6px 0 6px 20px;
  color:var(--ink-2);
  background:var(--sand);
}

/* ---------- Bento 信息板 ---------- */
.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:16px;
}

.bento-cell{
  grid-column:span 12;
  display:flex;
  flex-direction:column;
  gap:10px;
  min-width:0;
  padding:22px;
  background:var(--white);
  border:1px solid var(--line);
  box-shadow:0 1px 0 rgba(14,14,15,.04);
  transition:border-color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease);
}

.bento-cell--dark{
  background:var(--ink-2);
  border-color:var(--ink-2);
  color:var(--on-dark);
}
.bento-cell--dark .mono,
.bento-cell--dark p{ color:rgba(237,234,228,.78); }

.bento-cell--sand{
  background:var(--sand);
  border-color:rgba(14,14,15,.14);
}

.bento-cell--link{
  display:flex;
  position:relative;
  color:inherit;
}
.bento-cell--link:hover{
  transform:translateY(-1px);
  border-color:var(--orange);
  box-shadow:0 2px 0 rgba(255,90,31,.24);
}

@media (min-width:760px){
  .bento-cell--3{ grid-column:span 3; }
  .bento-cell--4{ grid-column:span 4; }
  .bento-cell--5{ grid-column:span 5; }
  .bento-cell--6{ grid-column:span 6; }
  .bento-cell--7{ grid-column:span 7; }
  .bento-cell--8{ grid-column:span 8; }
  .bento-cell--9{ grid-column:span 9; }
}

/* ---------- 分屏 ---------- */
.split{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:start;
}

@media (min-width:900px){
  .split{ grid-template-columns:7fr 5fr; gap:44px; }
  .split--even{ grid-template-columns:6fr 6fr; }
  .split--reverse{ grid-template-columns:5fr 7fr; }
}

/* ---------- 图片容器基础规则 ---------- */
.figure{
  margin:0;
  border:1px solid var(--line);
  background:var(--white);
  overflow:hidden;
}

.figure__media{
  position:relative;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  background-color:var(--sand);
  background-image:
    linear-gradient(135deg,rgba(14,14,15,.05) 0 25%,transparent 0 50%,rgba(14,14,15,.05) 0 75%,transparent 0);
  background-size:16px 16px;
}

.figure__media img,
.figure__media svg,
.figure__media picture{
  width:100%;
  height:100%;
  display:block;
  object-fit:cover;
}

.figure__media--wide{ aspect-ratio:21 / 9; }
.figure__media--tall{ aspect-ratio:3 / 4; }
.figure__media--square{ aspect-ratio:1 / 1; }

.figure__cap{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:12px 14px;
  border-top:1px solid var(--line);
  font-family:var(--mono);
  font-size:12px;
  line-height:1.6;
  letter-spacing:.02em;
  color:var(--slate);
}

.figure__mark{
  flex:none;
  width:10px;
  height:10px;
  background:var(--orange);
  transform:translateY(-1px);
}

/* ---------- 滚动显现 ---------- */
html[data-reveal-ready] [data-reveal]{
  opacity:0;
  transform:translateY(12px);
}
html[data-reveal-ready] [data-reveal].is-in{
  opacity:1;
  transform:none;
  transition:opacity .45s var(--ease),transform .45s var(--ease);
}

/* ---------- 响应式：页头 / 页脚 ---------- */
@media (max-width:900px){
  .masthead__bar{
    grid-template-columns:1fr;
    justify-items:center;
    gap:12px;
    padding-block:16px 14px;
  }
  .masthead__meta{
    flex-direction:row;
    flex-wrap:wrap;
    align-items:center;
    justify-content:center;
    gap:6px 10px;
    justify-self:center;
  }
  .masthead__plate{ justify-self:center; }
  .masthead__acts{
    justify-self:center;
    justify-content:center;
    flex-wrap:wrap;
    gap:12px;
    width:100%;
  }
  .nav-toggle{ display:inline-flex; }

  html.nav-open{ overflow:hidden; }

  .masthead::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:70;
    background:rgba(14,14,15,.55);
    opacity:0;
    pointer-events:none;
    transition:opacity .18s var(--ease);
  }
  .masthead[data-open]::before{
    opacity:1;
    pointer-events:auto;
  }

  .navrow{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:90;
    width:min(340px,88vw);
    padding:88px 24px 32px;
    overflow-y:auto;
    background:var(--ink);
    border-top:0;
    transform:translateX(101%);
    visibility:hidden;
    transition:transform .22s var(--ease),visibility 0s linear .22s;
  }
  .masthead[data-open] .navrow{
    transform:none;
    visibility:visible;
    transition:transform .22s var(--ease),visibility 0s linear 0s;
  }

  .navrow__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-width:none;
    padding-inline:0;
    overflow:visible;
  }
  .navrow__item{ border-bottom:1px solid var(--line-dark); }
  .navrow__link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    width:100%;
    padding:16px 0;
    font-size:18px;
    color:var(--on-dark);
  }
  .navrow__link::after{ display:none; }
  .navrow__link:hover{ color:var(--orange); }
  .navrow__link[aria-current="page"]{ color:var(--orange); }
  .navrow__link[aria-current="page"]::before{
    content:"—";
    font-family:var(--mono);
    font-size:12px;
    color:var(--orange);
    margin-left:auto;
    padding-right:10px;
  }

  .site-foot{ margin-top:56px; }
  .site-foot__inner{ padding-block:44px 24px; }
  .foot-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:32px 24px;
  }
  .site-foot__head{ margin-bottom:28px; }
}

@media (max-width:640px){
  .link-quiet{ display:none; }
  .masthead__edition{ font-size:11px; letter-spacing:0; }
  .masthead__plate{ font-size:24px; }
  .btn--sm{ font-size:13px; padding:10px 14px; }
  .nav-toggle{ padding:9px 10px; }
  .nav-toggle__text{ display:none; }

  .section{ padding-block:44px; }
  .section--tight{ padding-block:28px; }
  .page-head{ padding-block:28px 22px; }
  h2{ font-size:26px; }
  .prose h2{ font-size:26px; }
  .bento-cell{ padding:18px; }

  .foot-grid{ grid-template-columns:1fr; gap:28px; }
  .foot-bar{ padding:14px 16px; }
  .foot-base{ flex-direction:column; align-items:flex-start; }
}

/* ---------- 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;
    scroll-behavior:auto !important;
  }

  html[data-reveal-ready] [data-reveal],
  html[data-reveal-ready] [data-reveal].is-in{
    opacity:1;
    transform:none;
  }

  .bento-cell--link:hover,
  .masthead__plate:hover{
    transform:none;
  }
}