/* ===== 长乐坊安卓 · 丝路数字驿站 共享样式表 /assets/site.css ===== */

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

:root{
  --ink:#0B0B0F;
  --ink-soft:#101018;
  --ink-panel:#16161F;
  --line:rgba(232,213,183,.14);
  --line-strong:rgba(232,213,183,.30);
  --red:#C8102E;
  --red-deep:#8D0A20;
  --red-bright:#E63946;
  --gold:#D4A017;
  --gold-bright:#F2C14E;
  --teal:#0F7B7B;
  --teal-bright:#16A6A6;
  --sand:#E8D5B7;
  --cream:#F7F3EA;
  --white:#FFFFFF;
  --font-display:"ZCOOL QingKe HuangYou","Noto Serif SC","Songti SC","STSong",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",Menlo,Consolas,monospace;
  --cut:14px;
  --cut-sm:9px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

body{
  margin:0;
  background:var(--ink);
  color:var(--cream);
  font-family:var(--font-body);
  font-size:clamp(1rem,.96rem + .18vw,1.0625rem);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

img,
svg{ display:block; max-width:100%; }

h1,h2,h3,h4,h5,
p,ul,ol,figure,blockquote{ margin:0; }

ul,ol{ padding:0; list-style:none; }

a{ color:inherit; }

button{
  font:inherit;
  color:inherit;
  background:none;
  border:0;
  cursor:pointer;
}

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

#main-content{ scroll-margin-top:8.5rem; }

/* ---------- 容器 ---------- */
.shell{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:clamp(1rem,4.5vw,2.5rem);
}

/* ---------- 跳至主内容 ---------- */
.skip-link{
  position:fixed;
  top:-6rem;
  left:1rem;
  z-index:200;
  padding:.7rem 1.2rem;
  background:var(--gold-bright);
  color:#1A1204;
  font-weight:600;
  font-size:.9rem;
  text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:top .22s var(--ease);
}
.skip-link:focus{ top:1rem; }

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink);
  border-bottom:1px solid rgba(212,160,23,.26);
}

.header-top{
  background:
    radial-gradient(120% 200% at 0% 0%,rgba(15,123,123,.20) 0%,rgba(11,11,15,0) 58%),
    radial-gradient(90% 180% at 100% 0%,rgba(200,16,46,.18) 0%,rgba(11,11,15,0) 55%),
    #0B0B0F;
}

.header-top__inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  align-items:center;
  gap:.75rem 1.25rem;
  padding-block:.85rem;
}

.header-actions{
  grid-column:2;
  justify-self:end;
  display:flex;
  align-items:center;
  gap:.45rem;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  text-decoration:none;
  min-width:0;
}

.brand__mark{
  width:42px;
  height:42px;
  flex:0 0 42px;
  display:grid;
  place-items:center;
  font-family:var(--font-display);
  font-size:1.5rem;
  font-weight:700;
  line-height:1;
  color:var(--white);
  background:linear-gradient(140deg,var(--red-bright) 0%,var(--red-deep) 52%,var(--teal) 100%);
  clip-path:polygon(30% 0,100% 0,100% 70%,70% 100%,0 100%,0 30%);
  text-shadow:0 1px 6px rgba(0,0,0,.45);
}

.brand__text{ display:block; min-width:0; }

.brand__name{
  display:block;
  font-family:var(--font-display);
  font-size:1.3rem;
  line-height:1.15;
  letter-spacing:.04em;
  color:var(--white);
  white-space:nowrap;
}

.brand__sub{
  display:block;
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.2em;
  color:rgba(242,193,78,.85);
  white-space:nowrap;
}

.brand-tagline{ display:none; }

.brand-tagline__dot{
  width:7px;
  height:7px;
  flex:0 0 7px;
  background:var(--red-bright);
  transform:rotate(45deg);
}

.version-chip{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.28rem .6rem;
  border:1px solid rgba(242,193,78,.5);
  background:rgba(212,160,23,.10);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  line-height:1.2;
}

.version-chip__key{ color:rgba(232,213,183,.6); }

.version-chip__val{ color:var(--gold-bright); font-weight:700; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  padding:.62rem 1.15rem;
  font-size:.9rem;
  font-weight:600;
  letter-spacing:.03em;
  line-height:1.3;
  text-decoration:none;
  white-space:nowrap;
  border:1px solid transparent;
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  transition:transform .22s var(--ease),background-color .22s var(--ease),
             border-color .22s var(--ease),color .22s var(--ease);
}

.btn:hover{ transform:translateY(-2px); }

.btn--primary{
  background:linear-gradient(135deg,var(--red-bright),var(--red-deep));
  color:var(--white);
}
.btn--primary:hover{
  background:linear-gradient(135deg,#f04a58,var(--red));
}

.btn--gold{
  background:linear-gradient(135deg,var(--gold-bright),var(--gold));
  color:#241A05;
}
.btn--gold:hover{
  background:linear-gradient(135deg,#ffd672,var(--gold-bright));
}

.btn--ghost{
  border-color:var(--line-strong);
  color:var(--sand);
}
.btn--ghost:hover{
  border-color:var(--gold);
  color:var(--gold-bright);
  background:rgba(212,160,23,.12);
}

.btn--sm{
  padding:.4rem .8rem;
  font-size:.8rem;
}

/* ---------- 双层导航下层 ---------- */
.header-nav{
  background:linear-gradient(180deg,#0D0D14,#0B0B0F);
  border-top:1px solid rgba(232,213,183,.10);
}

.header-nav__inner{
  display:flex;
  align-items:center;
  gap:1rem;
  padding-block:.4rem;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.42rem .8rem;
  border:1px solid var(--line-strong);
  color:var(--sand);
  font-size:.8rem;
  letter-spacing:.12em;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}

.nav-toggle__bars{
  width:16px;
  height:2px;
  background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
}

.nav-toggle[aria-expanded="true"]{
  color:var(--gold-bright);
  border-color:var(--gold);
}

.nav-list{
  display:flex;
  flex:1 1 auto;
  align-items:center;
  gap:.2rem;
  padding:.42rem 0;
  overflow-x:auto;
  scrollbar-width:thin;
  scrollbar-color:rgba(212,160,23,.5) transparent;
}

.nav-list::-webkit-scrollbar{ height:4px; }
.nav-list::-webkit-scrollbar-thumb{ background:rgba(212,160,23,.45); }

.nav-list__item{ flex:0 0 auto; }

.nav-link{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.5rem .85rem;
  font-size:.93rem;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--sand);
  text-decoration:none;
  border:1px solid transparent;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}

.nav-link__num{
  font-family:var(--font-mono);
  font-size:.68rem;
  color:var(--gold);
  opacity:.75;
}

.nav-link:hover{
  color:var(--white);
  background:rgba(200,16,46,.18);
  border-color:rgba(200,16,46,.55);
}

.nav-link[aria-current="page"]{
  color:#1A1204;
  background:linear-gradient(135deg,var(--gold-bright),var(--gold));
  border-color:transparent;
}

.nav-link[aria-current="page"] .nav-link__num{
  color:#1A1204;
  opacity:.9;
}

/* ---------- 阅读进度 ---------- */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(232,213,183,.10);
}

.scroll-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--red-bright),var(--gold-bright) 55%,var(--teal-bright));
}

/* ---------- 通用组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold-bright);
}

.eyebrow::before{
  content:"";
  width:28px;
  height:2px;
  background:var(--red-bright);
}

.section-head{
  display:grid;
  gap:.6rem;
  margin-bottom:clamp(1.4rem,3vw,2.4rem);
}

.section-head h2{
  font-family:var(--font-display);
  font-size:clamp(1.7rem,1.4rem + 1.4vw,2.6rem);
  line-height:1.2;
  letter-spacing:.02em;
  color:var(--white);
}

.breadcrumb{ margin-block:1.2rem 0; }

.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  font-family:var(--font-mono);
  font-size:.78rem;
  color:rgba(232,213,183,.58);
}

.breadcrumb li + li::before{
  content:"/";
  margin-right:.45rem;
  color:rgba(212,160,23,.7);
}

.breadcrumb a{
  color:var(--teal-bright);
  text-decoration:none;
}
.breadcrumb a:hover{ color:var(--gold-bright); }

.breadcrumb [aria-current="page"]{ color:var(--sand); }

.prose{
  max-width:70ch;
  color:rgba(247,243,234,.9);
}

.prose h2,
.prose h3{
  font-family:var(--font-display);
  color:var(--white);
  line-height:1.25;
  margin-top:2.2em;
  margin-bottom:.6em;
}

.prose h2{ font-size:clamp(1.5rem,1.2rem + 1.1vw,2.1rem); }
.prose h3{ font-size:clamp(1.2rem,1.05rem + .6vw,1.5rem); }

.prose p + p{ margin-top:1em; }

.prose a{
  color:var(--teal-bright);
  text-decoration:underline;
  text-underline-offset:3px;
}

.prose strong{ color:var(--gold-bright); }

.grid{ display:grid; gap:clamp(1rem,2.4vw,1.75rem); }
.grid--2{ grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); }
.grid--3{ grid-template-columns:repeat(auto-fit,minmax(215px,1fr)); }

.panel{
  position:relative;
  padding:clamp(1.15rem,2.6vw,2rem);
  background:
    linear-gradient(158deg,rgba(255,255,255,.055),rgba(255,255,255,.012) 62%),
    var(--ink-panel);
  border:1px solid var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}

.clipped{
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}

.clipped--sm{
  clip-path:polygon(var(--cut-sm) 0,100% 0,100% calc(100% - var(--cut-sm)),calc(100% - var(--cut-sm)) 100%,0 100%,0 var(--cut-sm));
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.24rem .6rem;
  border:1px solid rgba(22,166,166,.42);
  background:rgba(22,166,166,.12);
  color:var(--teal-bright);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  line-height:1.4;
}

.tag--red{
  border-color:rgba(230,57,70,.45);
  background:rgba(200,16,46,.16);
  color:#FFAFB8;
}

.tag--gold{
  border-color:rgba(242,193,78,.45);
  background:rgba(212,160,23,.14);
  color:var(--gold-bright);
}

/* ---------- 图片槽 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  width:100%;
  aspect-ratio:16 / 9;
  background:
    linear-gradient(150deg,#1A1420 0%,#0D1A1A 55%,#191013 100%);
}

.media-frame > img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}

.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(200deg,rgba(200,16,46,.26) 0%,rgba(200,16,46,0) 42%,rgba(15,123,123,.30) 100%);
  mix-blend-mode:screen;
}

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

.media-frame--cut{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 28px),calc(100% - 28px) 100%,0 100%);
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  background:linear-gradient(180deg,#0B0B0F 0%,#101018 38%,#0B0B0F 100%);
  border-top:1px solid rgba(212,160,23,.26);
}

.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:repeating-linear-gradient(90deg,
    var(--red-bright) 0 40px,
    var(--gold-bright) 40px 80px,
    var(--teal-bright) 80px 120px);
  opacity:.9;
}

.footer-inner{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(1.8rem,4vw,3rem);
  padding-block:clamp(2.4rem,6vw,4rem);
}

.footer-brand__line{
  margin-top:1rem;
  max-width:34ch;
  font-size:.9rem;
  color:rgba(232,213,183,.72);
}

.brand--footer .brand__mark{
  width:50px;
  height:50px;
  flex:0 0 50px;
  font-size:1.75rem;
}

.brand--footer .brand__name{ font-size:1.5rem; }
.brand--footer .brand__sub{ font-size:.62rem; }

.footer-stats{
  display:flex;
  flex-wrap:wrap;
  gap:1.6rem;
  margin-top:1.4rem;
}

.footer-stats__num{
  display:block;
  font-family:var(--font-mono);
  font-size:1.55rem;
  line-height:1.1;
  color:var(--gold-bright);
}

.footer-stats__label{
  display:block;
  margin-top:.25rem;
  font-size:.74rem;
  letter-spacing:.16em;
  color:rgba(232,213,183,.55);
}

.footer-col__title{
  margin-bottom:1rem;
  padding-bottom:.6rem;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--teal-bright);
}

.footer-links{
  display:grid;
  gap:.55rem;
}

.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  font-size:.92rem;
  color:var(--sand);
  text-decoration:none;
  transition:color .2s var(--ease),transform .2s var(--ease);
}

.footer-links a::before{
  content:"";
  width:6px;
  height:6px;
  flex:0 0 6px;
  background:var(--red-bright);
  transform:rotate(45deg);
  transition:background-color .2s var(--ease);
}

.footer-links a:hover{
  color:var(--gold-bright);
  transform:translateX(3px);
}

.footer-links a:hover::before{ background:var(--gold-bright); }

.footer-contact{
  display:grid;
  gap:.7rem;
  margin-top:1.3rem;
  font-size:.85rem;
  color:rgba(232,213,183,.78);
}

.footer-contact__row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
}

.footer-contact__label{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.16em;
  color:var(--teal-bright);
}

.footer-contact__value{
  flex:1 1 auto;
  min-width:0;
  word-break:break-all;
}

.copy-btn{
  flex:0 0 auto;
  padding:.2rem .55rem;
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.1em;
  color:var(--sand);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}

.copy-btn:hover{
  border-color:var(--gold);
  color:var(--gold-bright);
  background:rgba(212,160,23,.12);
}

.copy-btn[data-copied]{
  border-color:var(--teal-bright);
  color:var(--teal-bright);
}

.footer-base{
  border-top:1px solid var(--line);
  background:rgba(0,0,0,.4);
}

.footer-base__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.5rem 1.5rem;
  padding-block:1.1rem;
  font-family:var(--font-mono);
  font-size:.76rem;
  color:rgba(232,213,183,.55);
}

/* ---------- 显现动画 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}

[data-reveal="in"]{
  opacity:1;
  transform:none;
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  .footer-inner{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .footer-brand{ grid-column:1 / -1; }
}

@media (min-width:820px){
  .footer-inner{ grid-template-columns:1.5fr 1fr 1.1fr; }
  .footer-brand{ grid-column:auto; }
}

@media (min-width:1024px){
  .header-top__inner{
    grid-template-columns:auto minmax(0,1fr) auto;
    padding-block:1rem;
  }
  .brand-tagline{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:.55rem;
    font-family:var(--font-mono);
    font-size:.8rem;
    letter-spacing:.08em;
    color:rgba(232,213,183,.66);
  }
  .header-actions{ grid-column:3; }
  .header-nav__inner{ padding-block:.45rem; }
}

@media (max-width:900px){
  .header-nav__inner{
    flex-wrap:wrap;
    padding-block:.55rem;
  }
  .nav-toggle{ display:inline-flex; }
  .nav-list{
    display:none;
    flex:1 0 100%;
    flex-direction:column;
    align-items:stretch;
    gap:.2rem;
    padding:.35rem 0 1rem;
    overflow:visible;
  }
  [data-nav][data-open] .nav-list{ display:flex; }
  .nav-list__item{ width:100%; }
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:.7rem .9rem;
    border-color:rgba(232,213,183,.12);
    background:rgba(255,255,255,.02);
  }
}

@media (max-width:720px){
  .header-actions .btn--ghost{ display:none; }
  .version-chip{ display:none; }
  .brand__sub{ letter-spacing:.12em; }
  .footer-base__inner{ justify-content:flex-start; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  [data-reveal]{
    opacity:1;
    transform:none;
  }
  .btn:hover{ transform:none; }
  .footer-links a:hover{ transform:none; }
}