/* ===== 大发地址指南 · 共享外壳 /assets/site.css ===== */

:root{
  --ink-900:#0B3438;
  --ink-800:#174A4E;
  --ink-700:#1E2B4D;
  --mist:#8FAFBE;
  --paper:#F4EAD9;
  --paper-hi:#FAF7F0;
  --signal:#F26A2E;
  --amber:#FFC46B;
  --ochre:#9A5A35;
  --wine:#7A2F3C;

  --rail-w:92px;
  --topbar-h:62px;
  --shell-pad:clamp(18px,4vw,56px);
  --maxw:1160px;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --line:rgba(11,52,56,.18);
  --line-soft:rgba(11,52,56,.1);
  --line-light:rgba(244,234,217,.2);
  --dur:.22s;
}

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

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html{scroll-padding-top:calc(var(--topbar-h) + 16px)}

body{
  margin:0;
  padding-top:var(--topbar-h);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--ink-900);
  background:var(--paper-hi);
  background-image:repeating-linear-gradient(0deg,rgba(11,52,56,.028) 0 1px,transparent 1px 4px);
  -webkit-font-smoothing:antialiased;
}

img,svg{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
button{font:inherit;color:inherit}
a{color:inherit}
::selection{background:var(--amber);color:var(--ink-900)}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--signal);
  outline-offset:3px;
  border-radius:2px;
}
.site-header :where(a,button):focus-visible,
.site-footer :where(a,button):focus-visible{outline-color:var(--amber)}

#main-content{scroll-margin-top:calc(var(--topbar-h) + 14px)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:50%;top:0;z-index:400;
  transform:translate(-50%,-180%);
  padding:10px 20px;
  background:var(--signal);color:#1b0c04;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  text-decoration:none;border-radius:0 0 4px 4px;
  transition:transform var(--dur) ease;
}
.skip-link:focus{transform:translate(-50%,0)}

/* ---------- 阅读进度线 ---------- */
.scroll-meter{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:300;
  pointer-events:none;background:rgba(11,52,56,.12);
}
.scroll-meter__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--signal),var(--amber));
  transition:width .08s linear;
}

/* ---------- 头部：栈桥 / 灯牌条 ---------- */
.site-header{position:fixed;z-index:200;background:var(--ink-900);color:var(--paper)}

@media (max-width:900px){
  .site-header{
    top:0;left:0;right:0;height:var(--topbar-h);
    display:flex;align-items:center;
    border-bottom:1px solid rgba(154,90,53,.55);
    box-shadow:0 6px 18px rgba(11,52,56,.14);
  }
}

.topbar{
  display:flex;align-items:center;gap:10px;
  width:100%;height:var(--topbar-h);
  padding:0 12px 0 16px;
}
.topbar .btn{margin-left:auto}

.brand{text-decoration:none;color:var(--paper)}
.brand--bar{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand--bar .brand__mark{
  font-family:var(--font-display);font-weight:900;
  font-size:17px;line-height:1.15;letter-spacing:.05em;color:var(--paper-hi);
}
.brand--bar .brand__sub{
  font-family:var(--font-mono);font-size:8px;line-height:1;letter-spacing:.26em;
  color:var(--mist);
}
.brand--rail{display:none}

.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 11px;
  background:transparent;color:var(--paper);
  border:1px solid rgba(244,234,217,.32);border-radius:3px;
  cursor:pointer;
  transition:border-color var(--dur),color var(--dur),background var(--dur);
}
.nav-toggle:hover{border-color:var(--amber);color:var(--amber);background:rgba(255,196,107,.08)}
.nav-toggle__text{font-size:12px;letter-spacing:.1em}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:3px;width:16px}
.nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform var(--dur),opacity var(--dur)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 导航基础 */
.site-nav{display:flex;flex-direction:column}
.site-nav__head{
  margin:0 0 10px;padding:0 4px;
  font-family:var(--font-mono);font-size:10px;line-height:1.4;
  letter-spacing:.2em;text-transform:uppercase;color:rgba(143,175,190,.92);
}
.nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.nav-link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:10px 4px;text-decoration:none;
  color:rgba(244,234,217,.8);
  font-size:12.5px;line-height:1.25;letter-spacing:.06em;
  transition:color var(--dur),background var(--dur);
}
.nav-link__code{
  font-family:var(--font-mono);font-size:9px;line-height:1;
  letter-spacing:.16em;color:var(--mist);
  transition:color var(--dur);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--amber);background:rgba(255,196,107,.08)}
.nav-link:hover .nav-link__code{color:var(--amber)}
.nav-link[aria-current="page"]{color:var(--amber);background:rgba(242,106,46,.14)}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  background:var(--signal);
}
.nav-link[aria-current="page"] .nav-link__code{color:var(--signal)}
.nav-link--legal{align-items:flex-start;font-size:11.5px;letter-spacing:.04em;color:rgba(244,234,217,.62);padding:7px 4px}
.nav-link--legal:hover{color:var(--amber)}

.site-nav__dock{margin-top:auto;display:flex;flex-direction:column;gap:7px;padding-top:16px}
.site-nav__note{
  margin:0;font-family:var(--font-mono);font-size:10px;line-height:1.6;
  letter-spacing:.04em;color:rgba(143,175,190,.85);text-align:center;
}

.nav-scrim{display:none}

/* 抽屉形态（移动端） */
@media (max-width:900px){
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;
    width:min(340px,86vw);
    z-index:230;
    padding:calc(var(--topbar-h) + 18px) 20px 26px;
    background:var(--ink-900);
    background-image:linear-gradient(165deg,#104549 0%,#0B3438 62%);
    border-left:1px solid rgba(154,90,53,.6);
    overflow-y:auto;
    transform:translateX(103%);
    visibility:hidden;
    transition:transform .28s cubic-bezier(.4,0,.2,1),visibility .28s;
  }
  .site-header[data-open="true"] .site-nav{transform:translateX(0);visibility:visible}

  .nav-list{margin-bottom:26px}
  .nav-list--legal{margin-bottom:0}
  .nav-link{
    flex-direction:row;align-items:baseline;justify-content:flex-start;gap:14px;
    padding:14px 2px;
    font-family:var(--font-display);font-weight:700;font-size:17px;letter-spacing:.04em;
    color:var(--paper-hi);
    border-bottom:1px solid rgba(244,234,217,.13);
  }
  .nav-link__code{font-size:11px;color:var(--ochre)}
  .nav-link[aria-current="page"]{background:rgba(242,106,46,.12)}
  .nav-link[aria-current="page"]::before{top:8px;bottom:8px;left:-20px;width:4px}
  .nav-link--legal{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;color:rgba(244,234,217,.7)}
  .site-nav__dock{margin-top:26px;padding-top:18px;border-top:1px dashed rgba(244,234,217,.24)}

  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:220;
    padding:0;border:0;cursor:pointer;
    background:rgba(5,22,24,.64);
    opacity:0;visibility:hidden;
    transition:opacity .28s ease,visibility .28s;
  }
  .site-header[data-open="true"] .nav-scrim{opacity:1;visibility:visible}

  html.nav-open,html.nav-open body{overflow:hidden}
}

/* 栈桥形态（桌面端） */
@media (min-width:901px){
  body{padding-top:0;padding-left:var(--rail-w)}

  .site-header{
    top:0;left:0;bottom:0;width:var(--rail-w);
    display:flex;flex-direction:column;
    border-right:1px solid rgba(154,90,53,.6);
    background-image:linear-gradient(180deg,#0B3438 0%,#0e3d41 52%,#0B3438 100%);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:5px;
    background:repeating-linear-gradient(90deg,rgba(154,90,53,.9) 0 8px,transparent 8px 16px);
    opacity:.85;
  }
  .topbar{display:none}
  .nav-toggle{display:none}
  .nav-scrim{display:none}

  .brand--rail{
    display:flex;flex-direction:row;justify-content:center;gap:9px;
    padding:22px 6px 20px;
    border-bottom:1px dashed rgba(244,234,217,.22);
    background:rgba(0,0,0,.14);
  }
  .brand--rail .brand__mark{
    writing-mode:vertical-rl;text-orientation:upright;
    font-family:var(--font-display);font-weight:900;
    font-size:18px;line-height:1;letter-spacing:.16em;color:var(--paper-hi);
    transition:color var(--dur);
  }
  .brand--rail .brand__sub{
    writing-mode:vertical-rl;
    font-family:var(--font-mono);font-size:8px;line-height:1.6;
    letter-spacing:.3em;color:var(--mist);
  }
  .brand--rail:hover .brand__mark{color:var(--amber)}

  .site-nav{
    flex:1 1 auto;min-height:0;overflow-y:auto;overflow-x:hidden;
    padding:12px 8px 16px;
    scrollbar-width:thin;
  }
  .site-nav::-webkit-scrollbar{width:4px}
  .site-nav::-webkit-scrollbar-thumb{background:rgba(143,175,190,.35);border-radius:2px}
  .site-nav__head{display:none}
  .nav-list__item{border-bottom:1px dashed rgba(244,234,217,.13)}
  .nav-list--legal{margin-top:14px}
  .nav-list--legal .nav-list__item{border-bottom:0}
  .site-nav__note{display:none}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:11px 16px;
  font-family:var(--font-body);font-size:13px;font-weight:600;
  line-height:1.2;letter-spacing:.06em;text-decoration:none;cursor:pointer;
  background:transparent;color:var(--paper);
  border:1px solid rgba(244,234,217,.4);border-radius:2px;
  transition:background var(--dur),color var(--dur),border-color var(--dur),transform var(--dur);
}
.btn:active{transform:translateY(1px)}
.btn--signal{background:var(--signal);color:#1b0c04;border-color:#d9561f}
.btn--signal:hover{background:var(--amber);border-color:var(--amber)}
.btn--ghost{background:transparent;color:var(--amber);border-color:rgba(255,196,107,.55)}
.btn--ghost:hover{background:rgba(255,196,107,.16);border-color:var(--amber)}
.btn--ink{background:var(--ink-900);color:var(--paper);border-color:var(--ink-900)}
.btn--ink:hover{background:var(--ink-800);border-color:var(--ink-800)}
.btn--block{width:100%;padding-left:6px;padding-right:6px;font-size:12px;letter-spacing:.04em}
.btn--xs{padding:8px 12px;font-size:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,88px);
  background:var(--ink-900);
  background-image:linear-gradient(180deg,#0B3438 0%,#0e3a3e 40%,#0B3438 100%);
  color:var(--paper);
  border-top:1px solid rgba(154,90,53,.7);
}
.site-footer__tear{
  position:absolute;top:0;left:0;right:0;height:6px;
  background:repeating-linear-gradient(90deg,rgba(154,90,53,.95) 0 18px,transparent 18px 30px);
}
.footer-inner{
  width:100%;max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(30px,5vw,58px) var(--shell-pad) 24px;
  display:grid;gap:clamp(26px,4vw,44px);
}
.footer-top{
  display:grid;gap:12px;
  padding-bottom:clamp(20px,3vw,32px);
  border-bottom:1px solid rgba(244,234,217,.16);
}
.footer-kicker{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--mist);
}
.footer-brand{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(34px,6.4vw,64px);line-height:1.02;letter-spacing:-.01em;
  color:var(--paper-hi);
}
.footer-line{
  max-width:44ch;font-size:14.5px;line-height:1.85;color:rgba(244,234,217,.76);
}

.footer-cols{
  display:grid;gap:clamp(18px,3vw,32px);
  grid-template-columns:repeat(3,minmax(0,1fr));
}
.footer-col__head{
  display:flex;align-items:center;gap:9px;
  margin-bottom:14px;
  font-family:var(--font-display);font-weight:700;font-size:16px;
  letter-spacing:.06em;color:var(--amber);
}
.footer-col__code{
  font-family:var(--font-mono);font-size:10px;font-weight:400;letter-spacing:.14em;
  color:var(--ochre);border:1px solid rgba(154,90,53,.75);
  padding:2px 5px;border-radius:2px;
}
.footer-col__list{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-col__link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14.5px;text-decoration:none;color:rgba(244,234,217,.8);
  transition:color var(--dur);
}
.footer-col__link::before{
  content:"";width:10px;height:1px;flex:none;
  background:var(--ochre);
  transition:width var(--dur),background var(--dur);
}
.footer-col__link:hover{color:var(--amber)}
.footer-col__link:hover::before{width:20px;background:var(--signal)}

.footer-contact{
  display:grid;gap:12px;
  padding:clamp(16px,2.4vw,24px);
  background:rgba(23,74,78,.55);
  border:1px solid rgba(244,234,217,.18);
  border-radius:3px;
}
.footer-contact__label{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--amber);
}
.contact-strip{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.contact-strip__row{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px 12px;
  padding-bottom:10px;
  border-bottom:1px dashed rgba(244,234,217,.16);
  font-size:14px;line-height:1.6;
}
.contact-strip__row:last-child{border-bottom:0;padding-bottom:0}
.contact-strip__k{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;
  color:var(--mist);min-width:38px;
}
.contact-strip__v{
  color:var(--paper-hi);word-break:break-word;user-select:all;
  font-variant-numeric:tabular-nums;
}
.copy-btn{
  margin-left:auto;
  padding:4px 10px;
  background:transparent;color:var(--amber);
  border:1px solid rgba(255,196,107,.45);border-radius:2px;
  font-size:11px;letter-spacing:.08em;cursor:pointer;
  transition:background var(--dur),color var(--dur),border-color var(--dur);
}
.copy-btn:hover{background:rgba(255,196,107,.16);border-color:var(--amber)}
.copy-btn[data-copied="true"]{background:var(--amber);color:#24150a;border-color:var(--amber)}
.footer-contact__note{
  font-size:12.5px;line-height:1.75;color:rgba(244,234,217,.62);
}

.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  padding-top:20px;
  border-top:1px solid rgba(244,234,217,.16);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:rgba(244,234,217,.6);
}
.footer-base p{margin:0}
.footer-icp{color:rgba(244,234,217,.8)}
.footer-closing{
  flex:1 1 240px;
  font-family:var(--font-body);font-size:12.5px;letter-spacing:.02em;
  color:rgba(244,234,217,.66);
}
.footer-base .btn{margin-left:auto}

@media (min-width:901px){
  .site-footer{margin-left:calc(-1 * var(--rail-w));padding-left:var(--rail-w)}
}

@media (max-width:760px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:430px){
  .footer-cols{grid-template-columns:1fr}
  .footer-base .btn{margin-left:0}
}

/* ---------- 页面通用组件 ---------- */
.container{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding-inline:var(--shell-pad);
}
.stack{display:grid;gap:clamp(12px,2vw,20px)}
.grid{display:grid;gap:clamp(16px,2.4vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:880px){.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:620px){.grid--2,.grid--3{grid-template-columns:1fr}}

.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--ochre);
}
.kicker::before{content:"";width:16px;height:2px;background:var(--signal);flex:none}

.section{padding-block:clamp(30px,5vw,64px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 16px;
  margin-bottom:clamp(16px,2.5vw,28px);
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.section__index{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--ochre);
}
.section__title{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(24px,3.4vw,38px);line-height:1.12;letter-spacing:-.01em;
}
.section__lede{flex:1 1 260px;font-size:14.5px;line-height:1.8;color:rgba(11,52,56,.72)}

.lede{
  font-family:var(--font-display);font-size:clamp(18px,2.2vw,22px);
  line-height:1.62;color:var(--ink-800);
}

.prose{max-width:68ch;font-size:17px;line-height:1.9;color:var(--ink-900)}
.prose p{margin-bottom:1.1em}
.prose h2{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(23px,3vw,32px);line-height:1.2;letter-spacing:-.01em;
  margin:1.9em 0 .55em;
}
.prose h3{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(18px,2.2vw,21px);line-height:1.35;
  margin:1.6em 0 .45em;
}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.25em}
.prose li{margin-bottom:.42em}
.prose a{color:var(--ochre);text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:var(--signal)}
.prose blockquote{
  margin:1.5em 0;padding:4px 0 4px 18px;
  border-left:3px solid var(--ochre);
  font-family:var(--font-display);font-size:17.5px;color:var(--ink-800);
}
.prose code{
  font-family:var(--font-mono);font-size:.88em;
  background:rgba(11,52,56,.07);padding:1px 5px;border-radius:2px;
}

.card{
  position:relative;
  padding:clamp(16px,2.4vw,26px);
  background:var(--paper-hi);
  border:1px solid var(--line);
  border-radius:3px;
  box-shadow:0 1px 0 rgba(11,52,56,.05);
}
.card--paper{background:var(--paper);border-color:rgba(154,90,53,.38)}
.card--ink{background:var(--ink-900);color:var(--paper);border-color:rgba(154,90,53,.6)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border-radius:2px;
  font-family:var(--font-mono);font-size:10.5px;line-height:1.6;letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ochre);background:rgba(244,234,217,.7);
  border:1px solid rgba(154,90,53,.55);
}
.tag--signal{background:var(--signal);border-color:var(--signal);color:#1b0c04}
.tag--ink{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper)}

.ticket{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:10px 16px 10px 14px;
  background:var(--paper);
  border:1px solid rgba(154,90,53,.42);
  border-left:4px solid var(--ochre);
  border-radius:2px;
  font-family:var(--font-mono);font-size:11.5px;line-height:1.6;letter-spacing:.08em;
  color:var(--ink-800);
}
.ticket::after{
  content:"";position:absolute;top:50%;right:0;
  width:9px;height:9px;transform:translate(50%,-50%);
  border-radius:50%;background:var(--paper-hi);
  border:1px solid rgba(154,90,53,.42);
}
.ticket__code{color:var(--ochre);font-weight:700}
.ticket__label{color:var(--ink-900)}

.figure{display:grid;gap:8px}
.figure__frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--line);
  border-radius:3px;
  background:var(--ink-800);
  background-image:linear-gradient(140deg,rgba(143,175,190,.32),rgba(11,52,56,.7));
}
.figure__img{display:block;width:100%;height:100%;object-fit:cover}
.figure__cap{
  font-family:var(--font-mono);font-size:11px;line-height:1.7;
  letter-spacing:.08em;color:rgba(11,52,56,.6);
}
.figure--tall .figure__frame{aspect-ratio:3/4}
.figure--square .figure__frame{aspect-ratio:1/1}

.note{
  padding:12px 16px;
  border-left:3px solid var(--wine);
  background:rgba(122,47,60,.07);
  font-size:14.5px;line-height:1.8;color:#3a1a20;
}
.note__title{
  display:block;margin-bottom:4px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--wine);
}

.rule{height:1px;border:0;background:var(--line);margin:clamp(20px,3vw,36px) 0}
.rule--dashed{background:none;border-top:1px dashed rgba(154,90,53,.5)}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  list-style:none;margin:0;padding:0;
  font-family:var(--font-mono);font-size:11px;line-height:1.8;letter-spacing:.1em;
  color:rgba(11,52,56,.62);
}
.breadcrumb__link{
  color:var(--ink-800);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur),border-color var(--dur);
}
.breadcrumb__link:hover{color:var(--signal);border-bottom-color:var(--signal)}
.breadcrumb__sep{color:var(--ochre)}
.breadcrumb__current{color:rgba(11,52,56,.55)}

/* ---------- 减少动效 ---------- */
@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-meter__bar{transition:none}
}