/* ==========================================================================
   杏运平台 · 共享站表 /assets/site.css
   1 变量  2 Reset  3 中文排版基础  4 布局与通用组件
   5 头部命令栏  6 页脚  7 动效与可访问性  8 响应式
   ========================================================================== */

/* 1. 变量 ---------------------------------------------------------------- */
:root{
  --orange:#E8863B;
  --orange-deep:#C96A24;
  --cream:#F7F0E4;
  --cream-hi:#FFFCF6;
  --apricot:#FBE7D2;
  --ink-green:#173F35;
  --pine:#24584A;
  --amber:#F2B84B;
  --sand:#D8B98A;
  --mist:#6F7268;
  --ink:#1F2421;

  --line:rgba(23,63,53,.13);
  --line-soft:rgba(23,63,53,.08);
  --on-dark:rgba(247,240,228,.8);
  --on-dark-soft:rgba(247,240,228,.6);

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-serif:Georgia,"Songti SC","Source Han Serif SC","Noto Serif SC","SimSun",serif;
  --font-hand:"Kaiti SC","STKaiti","KaiTi","Segoe UI",cursive;

  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --pill:999px;
  --shadow-soft:0 1px 2px rgba(31,36,33,.05),0 18px 36px -28px rgba(23,63,53,.55);
  --shadow-lift:0 3px 8px rgba(31,36,33,.07),0 28px 50px -26px rgba(23,63,53,.5);
  --max:1180px;
  --max-wide:1320px;
  --gutter:clamp(18px,4vw,40px);
  --header-h:68px;
  --focus:var(--orange-deep);
}

/* 2. Reset --------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 24px)}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit}
table{border-collapse:collapse;width:100%}
:where(a,button,summary,[tabindex]):focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:6px}
.site-footer :where(a,button):focus-visible{outline-color:var(--amber)}

/* 3. 中文排版基础 -------------------------------------------------------- */
body{
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(16px,.34vw + 15.2px,17.5px);
  line-height:1.78;
  letter-spacing:.012em;
  min-height:100vh;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.16;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(2.3rem,4.6vw,4rem);font-weight:900}
h2{font-size:clamp(1.7rem,2.6vw,2.5rem)}
h3{font-size:clamp(1.2rem,1.6vw,1.45rem);line-height:1.35}
h4{font-size:1.05rem;letter-spacing:.01em}
p{text-wrap:pretty}
strong{font-weight:700;color:var(--ink-green)}
small{font-size:.82rem}

/* 4. 布局与通用组件 ------------------------------------------------------ */
.container{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}
.container--wide{max-width:var(--max-wide)}
.container--narrow{max-width:820px}

.section{padding-block:clamp(48px,7vw,96px)}
.section--tint{background:var(--apricot)}
.section--ink{background:var(--ink-green);color:var(--cream)}
.section--ink h1,.section--ink h2,.section--ink h3{color:var(--cream)}

.stack>*+*{margin-top:var(--stack,1rem)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-display);font-size:.76rem;font-weight:700;
  letter-spacing:.18em;color:var(--orange-deep);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--amber),var(--orange))}

.section-head{display:grid;gap:.9rem;max-width:60ch;margin-bottom:clamp(24px,3vw,44px)}
.section-head__note{color:var(--mist);font-size:.95rem}

.prose{max-width:68ch}
.prose>*+*{margin-top:1.15em}
.prose h2{margin-top:1.9em}
.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li+li{margin-top:.45em}
.prose li::marker{color:var(--orange-deep)}
.prose a{color:var(--pine);text-decoration:underline;text-decoration-color:var(--amber);text-decoration-thickness:2px;text-underline-offset:3px}
.prose a:hover{color:var(--orange-deep)}
.prose blockquote{
  font-family:var(--font-serif);font-size:1.12rem;line-height:1.7;color:var(--pine);
  border-left:3px solid var(--orange);padding:.2em 0 .2em 1.2em;background:linear-gradient(90deg,rgba(242,184,75,.14),transparent 70%);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
}
.lede{font-size:clamp(1.05rem,1.5vw,1.22rem);line-height:1.72;color:#2b332e;max-width:64ch}

.grid{display:grid;gap:clamp(16px,2vw,26px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,1.6vw,22px)}
.bento__cell{grid-column:span 12}
@media (min-width:720px){
  .bento__cell{grid-column:span 6}
  .bento__cell--wide{grid-column:span 8}
  .bento__cell--narrow{grid-column:span 4}
  .bento__cell--full{grid-column:span 12}
}
@media (min-width:1024px){
  .bento__cell--third{grid-column:span 4}
}

.card{
  display:flex;flex-direction:column;gap:.7rem;
  background:var(--cream-hi);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:clamp(18px,2vw,28px);
  box-shadow:var(--shadow-soft);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);border-color:rgba(201,106,36,.35)}
.card--tint{background:var(--apricot);border-color:rgba(201,106,36,.22)}
.card--ink{background:var(--ink-green);border-color:rgba(242,184,75,.28);color:var(--cream)}
.card--ink .card__title,.card--ink h3{color:var(--cream)}
.card--ink .card__text{color:var(--on-dark)}
.card__title{font-family:var(--font-display);font-size:1.16rem;font-weight:800;letter-spacing:-.01em;color:var(--ink-green)}
.card__text{font-size:.95rem;color:#3a423c}
.card__meta{font-family:var(--font-hand);font-size:.85rem;color:var(--orange-deep);letter-spacing:.03em}
.card__foot{margin-top:auto;padding-top:.8rem;display:flex;align-items:center;gap:.7rem;flex-wrap:wrap}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--font-display);font-weight:700;font-size:.95rem;letter-spacing:.01em;
  padding:.72em 1.5em;border-radius:var(--pill);text-decoration:none;
  border:1.5px solid transparent;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn--primary{background:var(--orange);color:#2a1508;box-shadow:0 10px 22px -16px rgba(201,106,36,.9)}
.btn--primary:hover{background:var(--ink-green);color:var(--cream);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink-green);border-color:rgba(23,63,53,.4)}
.btn--ghost:hover{background:var(--apricot);border-color:var(--orange-deep);color:var(--orange-deep)}
.btn--quiet{padding:.4em .2em;color:var(--pine);border-radius:var(--r-sm);border-bottom:1.5px solid var(--amber);background:none}
.btn--quiet:hover{color:var(--orange-deep)}
.btn--sm{font-size:.84rem;padding:.55em 1.05em}
.btn--block{width:100%}
.section--ink .btn--ghost{color:var(--cream);border-color:rgba(247,240,228,.42)}
.section--ink .btn--ghost:hover{background:rgba(242,184,75,.18);color:var(--amber);border-color:var(--amber)}

.pill{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.26em .82em;border-radius:var(--pill);
  font-size:.76rem;font-weight:700;letter-spacing:.06em;
  color:var(--pine);background:rgba(36,88,74,.08);border:1px solid rgba(36,88,74,.18);
}
.pill--solid{background:var(--orange);border-color:transparent;color:#2a1508}
.pill--amber{background:rgba(242,184,75,.26);border-color:rgba(201,106,36,.35);color:var(--orange-deep)}
.pill--outline{background:transparent;border-color:rgba(247,240,228,.4);color:var(--cream)}

.breadcrumbs{font-size:.82rem;color:var(--mist);letter-spacing:.02em}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.5em;list-style:none}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:.5em}
.breadcrumbs__link{color:var(--pine);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumbs__link:hover{color:var(--orange-deep);border-bottom-color:var(--amber)}
.breadcrumbs__current{color:var(--ink);font-weight:700}
.breadcrumbs__sep{color:var(--sand)}

.figure{display:grid;gap:.6rem}
.figure__media{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  aspect-ratio:16/10;background:
    radial-gradient(120% 90% at 8% 0%,rgba(242,184,75,.5),transparent 58%),
    radial-gradient(100% 100% at 92% 18%,rgba(232,134,59,.52),transparent 62%),
    linear-gradient(158deg,#FBE7D2,#D8B98A 68%,#C96A24);
}
.figure__media::after{
  content:"";position:absolute;inset:0;opacity:.72;pointer-events:none;
  background:repeating-radial-gradient(ellipse 92% 70% at 26% 112%,transparent 0 26px,rgba(23,63,53,.16) 26px 27px);
}
.figure__media img{width:100%;height:100%;object-fit:cover;position:relative;z-index:1}
.figure__media--wide{aspect-ratio:21/9}
.figure__media--tall{aspect-ratio:3/4}
.figure__media--square{aspect-ratio:1/1}
.figure__media--ink{background:
    radial-gradient(110% 80% at 12% 0%,rgba(242,184,75,.28),transparent 58%),
    linear-gradient(150deg,#24584A,#173F35 70%);}
.figure__caption{font-family:var(--font-hand);font-size:.85rem;color:var(--mist);letter-spacing:.03em}

.journey-rail__list{display:grid;gap:.35rem;list-style:none}
.journey-rail__link{
  display:flex;gap:.7em;align-items:baseline;padding:.5rem .8rem;border-radius:var(--r-sm);
  font-size:.88rem;color:var(--mist);text-decoration:none;border-left:2px solid var(--line);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.journey-rail__link:hover{color:var(--ink-green);background:rgba(251,231,210,.5)}
.journey-rail__link[aria-current]{color:var(--ink-green);font-weight:700;border-left-color:var(--orange);background:rgba(251,231,210,.7)}

.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* 5. 头部命令栏 ---------------------------------------------------------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:.6em 1.2em;border-radius:var(--pill);
  background:var(--ink-green);color:var(--cream);
  font-family:var(--font-display);font-weight:700;font-size:.86rem;text-decoration:none;
  transform:translateY(-180%);transition:transform .2s ease;
}
.skip-link:focus,.skip-link:focus-visible{transform:none;outline-color:var(--amber)}

.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,240,228,.94);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
  transition:box-shadow .24s ease,border-color .24s ease;
}
.site-header[data-scrolled]{box-shadow:0 16px 34px -30px rgba(23,63,53,.9);border-bottom-color:var(--line)}

.site-progress{position:absolute;left:0;right:0;bottom:-1px;height:3px;background:rgba(23,63,53,.07);overflow:hidden}
.site-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--amber),var(--orange) 55%,var(--orange-deep));
  transform-origin:left center;transform:scaleX(0);
}

.site-header__inner{
  width:100%;max-width:var(--max-wide);margin-inline:auto;
  padding:clamp(8px,1vw,12px) var(--gutter);
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:clamp(12px,2vw,32px);
  min-height:var(--header-h);
}

.brand{display:inline-flex;align-items:center;gap:.65rem;text-decoration:none;color:var(--ink-green);flex:none}
.brand__mark{
  position:relative;width:36px;height:36px;flex:none;
  border-radius:14px 14px 14px 4px;
  background:linear-gradient(148deg,var(--amber),var(--orange) 48%,var(--orange-deep));
  box-shadow:0 8px 16px -12px rgba(201,106,36,.95);
}
.brand__mark::before{
  content:"";position:absolute;inset:7px 9px 9px 8px;
  border-radius:50% 50% 50% 6px;
  border:1.5px solid rgba(23,63,53,.55);
  border-right-color:transparent;border-bottom-color:rgba(23,63,53,.28);
}
.brand__mark::after{content:"";position:absolute;left:50%;bottom:5px;width:10px;height:1.5px;background:rgba(23,63,53,.5);transform:translateX(-50%);border-radius:2px}
.brand__mark--footer{width:30px;height:30px;border-radius:12px 12px 12px 4px;box-shadow:none}
.brand__text{display:grid;line-height:1.1}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:1.06rem;letter-spacing:.02em}
.brand__sub{font-size:.68rem;letter-spacing:.2em;color:var(--mist)}

.site-nav{min-width:0}
.site-nav__list{display:flex;align-items:center;gap:2px;list-style:none;counter-reset:nav;overflow-x:auto;scrollbar-width:none}
.site-nav__list::-webkit-scrollbar{display:none}
.site-nav__item{flex:none}
.site-nav__link{
  counter-increment:nav;
  display:inline-flex;align-items:baseline;gap:.45em;
  padding:.5rem .78rem;border-radius:var(--pill);
  font-family:var(--font-display);font-size:.9rem;font-weight:600;
  color:#2f3733;text-decoration:none;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease;
}
.site-nav__link::before{
  content:counter(nav,decimal-leading-zero);
  font-size:.6rem;font-weight:700;letter-spacing:.08em;
  color:var(--mist);font-variant-numeric:tabular-nums;
  transition:color .18s ease;
}
.site-nav__link:hover{background:var(--apricot);color:var(--ink-green)}
.site-nav__link:hover::before{color:var(--orange-deep)}
.site-nav__link[aria-current="page"]{background:var(--ink-green);color:var(--cream)}
.site-nav__link[aria-current="page"]::before{color:var(--amber)}

.header-tools{display:flex;align-items:center;gap:.6rem;justify-self:end}
.header-status{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.3rem .7rem;border-radius:var(--pill);
  background:var(--apricot);border:1px solid rgba(201,106,36,.26);
  font-size:.7rem;letter-spacing:.04em;color:var(--pine);white-space:nowrap;
}
.header-status__dot{width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 3px rgba(232,134,59,.22);flex:none}
.header-status__ver{font-weight:700;color:var(--ink-green)}
.header-status__note{color:var(--orange-deep);border-left:1px solid rgba(201,106,36,.35);padding-left:.45em}
.header-cta{white-space:nowrap}

.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  padding:.42rem .8rem;border-radius:var(--pill);
  border:1.5px solid rgba(23,63,53,.28);color:var(--ink-green);
  font-family:var(--font-display);font-weight:700;font-size:.82rem;
  transition:background-color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:var(--apricot);border-color:var(--orange-deep)}
.nav-toggle__bars{display:grid;gap:4px;width:18px;flex:none}
.nav-toggle__bars span{height:2px;border-radius:2px;background:currentColor;transition:transform .24s ease,opacity .18s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 6. 页脚 ---------------------------------------------------------------- */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--ink-green);color:var(--cream);
  padding-top:clamp(40px,5vw,68px);
  border-top:3px solid var(--orange);
}
.site-footer__terrain{
  position:absolute;inset:0;pointer-events:none;opacity:.85;
  background:
    radial-gradient(120% 62% at 10% 0%,rgba(242,184,75,.16),transparent 60%),
    radial-gradient(84% 52% at 90% 6%,rgba(232,134,59,.2),transparent 62%),
    repeating-radial-gradient(ellipse 118% 62% at 22% 118%,transparent 0 36px,rgba(216,185,138,.13) 36px 37px);
}
.site-footer__inner{
  position:relative;z-index:1;
  width:100%;max-width:var(--max-wide);margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;gap:clamp(26px,3.4vw,54px);
  grid-template-columns:minmax(0,1.15fr) minmax(0,1.5fr) minmax(0,1.05fr);
}
.footer-brand{display:grid;gap:.55rem;align-content:start}
.footer-brand__link{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--cream)}
.footer-brand__name{font-family:var(--font-display);font-weight:900;font-size:1.12rem;letter-spacing:.03em}
.footer-brand__sub{font-size:.78rem;letter-spacing:.16em;color:var(--sand)}
.footer-brand__note{font-size:.9rem;line-height:1.7;color:var(--on-dark);max-width:30ch}

.footer-nav{display:grid;grid-template-columns:1fr 1fr;gap:clamp(18px,2.4vw,36px)}
.footer-col{display:grid;gap:.7rem;align-content:start}
.footer-col__title{
  font-family:var(--font-display);font-size:.74rem;font-weight:700;
  letter-spacing:.2em;color:var(--sand);text-transform:uppercase;
}
.footer-col__list{display:grid;gap:.42rem;list-style:none}
.footer-link{
  font-size:.92rem;color:var(--on-dark);text-decoration:none;
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .18s ease,border-color .18s ease;
}
.footer-link:hover{color:var(--cream);border-bottom-color:var(--amber)}

.footer-contact{display:grid;gap:.75rem;align-content:start}
.footer-contact__list{display:grid;gap:.15rem}
.footer-contact__item{
  display:flex;gap:.8rem;padding:.42rem 0;
  border-bottom:1px dashed rgba(247,240,228,.16);
}
.footer-contact__term{flex:none;min-width:3.1em;font-size:.74rem;letter-spacing:.12em;color:var(--sand);padding-top:.28em}
.footer-contact__value{margin:0;font-size:.9rem;line-height:1.6;color:var(--cream);word-break:break-word}
.footer-note{font-size:.8rem;line-height:1.65;color:var(--on-dark-soft);max-width:34ch;margin-top:.3rem}

.site-footer__meta{
  position:relative;z-index:1;
  width:100%;max-width:var(--max-wide);margin:clamp(28px,3.5vw,52px) auto 0;
  padding:1rem var(--gutter) 1.4rem;
  display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;align-items:center;justify-content:space-between;
  border-top:1px solid rgba(247,240,228,.16);
  font-size:.78rem;letter-spacing:.06em;color:var(--on-dark-soft);
}
.footer-meta__copy,.footer-meta__icp{margin:0}
.footer-meta__icp{color:var(--sand)}

/* 7. 动效与可访问性 ------------------------------------------------------ */
html.reveal-ready [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .62s ease var(--reveal-delay,0s),transform .62s cubic-bezier(.22,.7,.28,1) var(--reveal-delay,0s);
  will-change:opacity,transform;
}
html.reveal-ready [data-reveal].is-revealed{opacity:1;transform:none}

@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.reveal-ready [data-reveal]{opacity:1;transform:none}
  .card:hover{transform:none}
}

/* 8. 响应式 -------------------------------------------------------------- */
@media (max-width:1180px){
  .header-status{display:none}
}
@media (max-width:940px){
  :root{--header-h:60px}
  .site-header__inner{grid-template-columns:minmax(0,1fr) auto;gap:.6rem;min-height:var(--header-h)}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    max-height:0;overflow:hidden;visibility:hidden;opacity:0;
    background:var(--cream-hi);
    border-bottom:1px solid var(--line);
    box-shadow:0 22px 34px -28px rgba(23,63,53,.8);
    transition:max-height .3s ease,opacity .24s ease,visibility .24s ease;
  }
  .site-nav[data-open]{max-height:min(74vh,560px);overflow:auto;visibility:visible;opacity:1}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px;padding:.6rem var(--gutter) 1.1rem;overflow:visible}
  .site-nav__link{width:100%;justify-content:flex-start;padding:.72rem .9rem;border-radius:var(--r-sm);font-size:1rem}
  .site-nav__link[aria-current="page"]{background:var(--apricot);color:var(--ink-green)}
  .site-nav__link[aria-current="page"]::before{color:var(--orange-deep)}
  .site-footer__inner{grid-template-columns:1fr;gap:2rem}
  .footer-brand__note{max-width:46ch}
}
@media (max-width:720px){
  .brand__sub{display:none}
  .brand__name{font-size:1rem}
  .header-cta{font-size:.78rem;padding:.5em .9em}
  .footer-nav{grid-template-columns:1fr 1fr}
  .site-footer__meta{flex-direction:column;align-items:flex-start;gap:.4rem}
  .figure__media{aspect-ratio:4/3;border-radius:var(--r-md)}
}
@media (max-width:420px){
  .nav-toggle__label{display:none}
  .footer-nav{grid-template-columns:1fr}
}