/* ==========================================================================
   贝斯特2255 · 共享站点样式表  /assets/site.css
   深青框架 + 沙金纸张 + 石榴红锚点
   ========================================================================== */

:root{
  --ink:#111111;
  --paper:#F7F3EA;
  --paper-2:#FDFBF6;
  --deep:#1F4E5F;
  --deep-2:#357A8A;
  --sand:#C9A96E;
  --sand-2:#E4D4B0;
  --red:#C0392B;
  --haze:#D8D2C4;
  --muted:#6B6053;
  --line-soft:rgba(201,169,110,.30);

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

  --shell:1240px;
  --gutter:clamp(16px,4vw,44px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:66px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-padding-top:112px;
}
body{
  margin:0;
  background-color:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg,video{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
iframe{max-width:100%}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.24;
  letter-spacing:-.012em;
  margin:0 0 .62em;
  text-wrap:balance;
}
h1{font-size:clamp(28px,4.2vw,46px)}
h2{font-size:clamp(22px,3vw,32px)}
h3{font-size:clamp(17px,2.1vw,22px);font-weight:800}
h4{font-size:16px;font-weight:800;letter-spacing:.01em}
p{margin:0 0 1em;text-wrap:pretty}
ul,ol{margin:0 0 1em;padding-left:1.35em}
li{margin-bottom:.35em}
li:last-child{margin-bottom:0}
strong,b{font-weight:700}
small{font-size:12.5px}
hr{border:0;border-top:1px solid var(--haze);margin:clamp(24px,4vw,44px) 0}
a{
  color:var(--deep);
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
a:hover{color:var(--deep-2)}
::selection{background:var(--sand);color:var(--ink)}
:focus-visible{outline:2px solid var(--red);outline-offset:2px;border-radius:2px}
main{display:block}

/* ---------- 工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);
  white-space:nowrap;border:0;
}
.skip-link{
  position:fixed;top:-110px;left:16px;z-index:200;
  padding:12px 20px;
  background:var(--red);color:#fff;
  font-family:var(--font-display);font-weight:800;font-size:15px;
  text-decoration:none;border-radius:2px;
  box-shadow:0 12px 26px -18px rgba(17,17,17,.9);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px;color:#fff}

/* ---------- 头部框架 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background-color:var(--deep);
  color:var(--paper);
  border-bottom:3px solid var(--sand);
}
.header-frame{
  display:flex;
  align-items:stretch;
  gap:clamp(10px,1.8vw,26px);
  min-height:var(--header-h);
}
.header-brand{
  display:flex;align-items:center;
  padding-block:10px;
  margin-right:auto;
  min-width:0;
}
.brand-mark{
  display:grid;gap:1px;
  text-decoration:none;color:inherit;
}
.brand-mark:hover,.brand-mark:focus-visible{color:inherit}
.brand-cn{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(18px,2vw,22px);
  line-height:1.1;
  letter-spacing:-.01em;
}
.brand-sub{
  font-size:11.5px;
  line-height:1.4;
  letter-spacing:.06em;
  color:rgba(247,243,234,.60);
}

.header-nav{margin-left:0}
.nav-list{
  display:flex;align-items:stretch;
  list-style:none;margin:0;padding:0;
}
.nav-list > li{display:flex}
.nav-list a{
  display:flex;align-items:center;
  padding:0 clamp(9px,1.2vw,18px);
  color:rgba(247,243,234,.82);
  text-decoration:none;
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  letter-spacing:.06em;
  white-space:nowrap;
  border-left:1px solid var(--line-soft);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.nav-list a:hover{background-color:rgba(247,243,234,.10);color:var(--paper)}
.nav-list a[aria-current="page"]{
  background-color:var(--deep-2);
  color:#fff;
  box-shadow:inset 0 -4px 0 var(--red);
}
.nav-list a[aria-current="page"]::before{
  content:"";
  width:5px;height:5px;flex:none;
  margin-right:8px;
  background-color:var(--sand);
}

.header-tools{
  display:flex;align-items:center;
  gap:10px;
  padding-block:10px;
}
.header-cta{
  display:inline-flex;align-items:center;
  height:38px;padding:0 16px;
  background-color:var(--sand);color:#231D14;
  font-family:var(--font-display);
  font-weight:800;font-size:13.5px;letter-spacing:.04em;
  text-decoration:none;border-radius:2px;white-space:nowrap;
  transition:background-color .16s var(--ease),transform .16s var(--ease);
}
.header-cta:hover{background-color:var(--sand-2);color:#111;transform:translateY(-1px)}
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 14px;
  background-color:transparent;
  color:var(--paper);
  border:1px solid rgba(201,169,110,.55);
  border-radius:2px;
  font-family:var(--font-display);
  font-weight:700;font-size:13.5px;letter-spacing:.06em;
  cursor:pointer;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover{background-color:rgba(201,169,110,.16)}
.nav-toggle-icon{
  width:18px;height:12px;flex:none;
  background-image:
    linear-gradient(currentColor,currentColor),
    linear-gradient(currentColor,currentColor),
    linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;
  background-size:100% 2px,100% 2px,100% 2px;
  background-position:0 0,0 5px,0 10px;
}
.nav-toggle[aria-expanded="true"]{
  background-color:var(--sand);
  border-color:var(--sand);
  color:var(--deep);
}

.header-tape{
  background-color:var(--sand-2);
  color:#3E3629;
  border-top:1px solid rgba(17,17,17,.14);
}
.header-tape-inner{
  display:flex;align-items:center;gap:14px;
  min-height:32px;
  font-size:12.5px;letter-spacing:.04em;
}
.tape-tag{
  display:inline-flex;align-items:center;
  padding:2px 9px;
  background-color:var(--red);color:#fff;
  font-family:var(--font-display);
  font-weight:800;font-size:11.5px;letter-spacing:.08em;
  border-radius:2px;white-space:nowrap;
}
.tape-note{
  margin-left:auto;
  color:var(--muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.scroll-progress{
  position:fixed;top:0;left:0;right:0;
  height:3px;
  background-color:var(--red);
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
  z-index:120;
  pointer-events:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(40px,6vw,80px);
  background-color:var(--deep);
  color:rgba(247,243,234,.84);
  border-top:3px solid var(--sand);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(24px,3.4vw,44px);
  padding-block:clamp(34px,4.6vw,60px);
}
.footer-col{min-width:0}
.footer-col-title{
  font-family:var(--font-display);
  font-size:13px;font-weight:800;
  letter-spacing:.18em;
  color:var(--sand);
  margin:0 0 16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-soft);
}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-links li{margin:0}
.footer-links a{
  display:inline-flex;align-items:baseline;gap:9px;
  color:rgba(247,243,234,.84);
  text-decoration:none;
  font-size:14px;line-height:1.5;
  transition:color .16s var(--ease);
}
.footer-links a::before{content:"→";color:var(--sand);font-size:12px;line-height:1}
.footer-links a:hover{color:var(--sand);text-decoration:underline;text-underline-offset:3px}
.footer-links a[aria-current="page"]{color:#fff;font-weight:700}
.footer-links a[aria-current="page"]::before{content:"▸"}
.footer-text{
  margin:0;
  font-size:13.5px;line-height:1.85;
  color:rgba(247,243,234,.74);
}
.entry-no{
  display:inline-block;
  padding:1px 7px;
  background-color:rgba(201,169,110,.18);
  border:1px solid rgba(201,169,110,.55);
  color:var(--sand);
  font-size:12px;letter-spacing:.06em;
  border-radius:2px;
}
.footer-contact{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.footer-contact li{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;
  margin:0;
}
.contact-label{
  flex:0 0 auto;min-width:60px;
  font-size:11px;letter-spacing:.14em;
  color:rgba(201,169,110,.88);
}
.contact-value{
  font-size:13.5px;line-height:1.6;
  color:rgba(247,243,234,.92);
  word-break:break-word;
}
.footer-note{
  margin:14px 0 0;
  font-size:12.5px;line-height:1.7;
  color:rgba(247,243,234,.56);
}
.copy-btn{
  flex:0 0 auto;
  padding:2px 8px;
  background-color:transparent;
  border:1px solid rgba(201,169,110,.42);
  color:var(--sand);
  font-family:var(--font-body);
  font-size:11.5px;letter-spacing:.04em;
  border-radius:2px;cursor:pointer;
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.copy-btn:hover{background-color:rgba(201,169,110,.18)}
.copy-btn[data-copied="true"]{
  background-color:var(--sand);
  border-color:var(--sand);
  color:var(--deep);
}
.footer-base{
  background-color:rgba(0,0,0,.16);
  border-top:1px solid rgba(201,169,110,.22);
}
.footer-base-inner{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:10px 20px;
  padding-block:16px;
  font-size:12.5px;
  color:rgba(247,243,234,.62);
}
.footer-base-inner p{margin:0}
.footer-copy{color:rgba(247,243,234,.50)}
.to-top{
  margin-left:auto;
  padding:7px 14px;
  background-color:transparent;
  border:1px solid rgba(201,169,110,.50);
  color:var(--sand);
  font-family:var(--font-body);
  font-size:12.5px;letter-spacing:.04em;
  border-radius:2px;cursor:pointer;
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.to-top:hover{background-color:var(--sand);color:var(--deep)}

/* ---------- 正文容器 ---------- */
.prose{max-width:72ch;font-size:16.5px;line-height:1.85}
.prose h2{margin-top:1.9em}
.prose h3{margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.4em}
.prose blockquote{
  margin:1.6em 0;
  padding:14px 20px;
  border-left:3px solid var(--sand);
  background-color:var(--paper-2);
  color:#3E3629;
}
.prose blockquote p:last-child{margin-bottom:0}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.04em;
  color:var(--muted);
}
.crumbs a{color:var(--deep);text-decoration:none}
.crumbs a:hover{text-decoration:underline;text-underline-offset:3px}
.crumbs [aria-current="page"]{color:var(--ink);font-weight:700}
.crumb-sep{color:var(--sand)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:2px;
  font-family:var(--font-display);
  font-weight:800;font-size:15px;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.btn--primary{
  background-color:var(--deep);
  color:var(--paper);
  box-shadow:inset 0 -3px 0 var(--red);
}
.btn--primary:hover{background-color:var(--deep-2);color:var(--paper);transform:translateY(-1px)}
.btn--accent{background-color:var(--red);color:#fff}
.btn--accent:hover{background-color:#A5301F;color:#fff;transform:translateY(-1px)}
.btn--ghost{border-color:var(--ink);color:var(--ink);background-color:transparent}
.btn--ghost:hover{background-color:var(--ink);color:var(--paper)}
.btn--small{padding:8px 15px;font-size:13px}

/* ---------- 标签 / 卡片 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  background-color:var(--sand-2);
  border:1px solid var(--haze);
  color:#4A4136;
  font-size:11.5px;letter-spacing:.08em;
  border-radius:2px;
}
.tag--current{background-color:var(--red);border-color:var(--red);color:#fff}
.tag--deep{background-color:var(--deep);border-color:var(--deep);color:var(--paper)}
.panel{
  background-color:var(--paper-2);
  border:1px solid var(--haze);
  border-radius:2px;
  padding:clamp(18px,2.4vw,28px);
}
.panel--stack{
  box-shadow:6px 6px 0 var(--sand-2),12px 12px 0 rgba(201,169,110,.22);
}
.section-head{
  margin-bottom:clamp(20px,3vw,34px);
  padding-bottom:14px;
  border-bottom:1px solid var(--haze);
}
.section-head h2{margin-bottom:0}
.section-head p{margin:.6em 0 0;color:var(--muted);font-size:14.5px}
.eyebrow{
  display:block;
  margin-bottom:8px;
  font-size:12px;letter-spacing:.2em;
  color:var(--deep-2);
  text-transform:uppercase;
}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background-color:var(--paper-2);
  border:1px solid var(--haze);
  border-radius:2px;
}
.media-frame img,
.media-frame svg,
.media-frame picture{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--3x2{aspect-ratio:3/2}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--3x4{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--empty{
  background-color:var(--sand-2);
  background-image:
    repeating-linear-gradient(135deg,rgba(31,78,95,.10) 0 2px,rgba(31,78,95,0) 2px 12px),
    linear-gradient(180deg,rgba(247,243,234,.65),rgba(201,169,110,.28));
}
.media-frame--empty::after{
  content:"◇";
  position:absolute;inset:0;
  display:grid;place-items:center;
  font-size:28px;
  color:rgba(31,78,95,.30);
}
.media-caption{
  display:block;
  margin-top:8px;
  font-size:12px;letter-spacing:.03em;
  color:var(--muted);
}

/* ---------- 显现动效 ---------- */
[data-reveal].is-visible{animation:reveal-rise .55s var(--ease) both}
@keyframes reveal-rise{
  from{opacity:.001;transform:translateY(16px)}
  to{opacity:1;transform:none}
}

/* ---------- 移动端导航 ---------- */
@media (max-width:899px){
  .header-nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:block;
    max-height:min(72vh,520px);
    overflow-y:auto;
    background-color:var(--deep);
    border-top:1px solid var(--line-soft);
    border-bottom:3px solid var(--sand);
    visibility:hidden;
    opacity:0;
    transform:translateY(-8px);
    pointer-events:none;
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s linear;
  }
  .header-nav[data-open]{
    visibility:visible;
    opacity:1;
    transform:none;
    pointer-events:auto;
  }
  .nav-list{flex-direction:column;align-items:stretch;padding:8px 0}
  .nav-list > li{display:block}
  .nav-list a{
    padding:14px var(--gutter);
    border-left:0;
    border-bottom:1px solid rgba(201,169,110,.16);
    font-size:15.5px;
  }
  .nav-list a[aria-current="page"]{box-shadow:inset 4px 0 0 var(--red)}
  .nav-list a[aria-current="page"]::before{display:none}
}
@media (min-width:900px){
  .nav-toggle{display:none}
}
@media (min-width:900px) and (max-width:1100px){
  .brand-sub{display:none}
}
@media (max-width:767px){
  .tape-note{display:none}
}
@media (max-width:639px){
  .header-cta{height:34px;padding:0 11px;font-size:12.5px}
  .nav-toggle{height:34px;padding:0 11px;font-size:12.5px}
  .header-tape-inner{font-size:11.5px;min-height:30px}
  .footer-contact li{gap:6px}
  .contact-label{min-width:56px}
  .to-top{margin-left:0}
}
@media (max-width:479px){
  .brand-sub{display:none}
}

/* ---------- 响应式页脚 ---------- */
@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1000px){
  .footer-grid{grid-template-columns:1fr 1fr 1.55fr 1.3fr}
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .scroll-progress{transition:none !important}
}