/* ==========================================================================
   澳博主页 · /assets/site.css
   共享层：变量 / reset / 中文排版 / 双层页头 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --abyss:#0B2545;
  --hull:#123A63;
  --hull-soft:#1B4E80;
  --shallow:#E6EEF7;
  --emerald:#0E7C66;
  --emerald-lite:#6FD3BC;
  --gold:#C9A227;
  --gold-lite:#F0D98A;
  --coral:#FF6B4A;
  --ink:#0A0F14;
  --grey:#5A6A78;
  --mist:#FAFBFC;
  --white:#FFFFFF;

  --line-gold:rgba(201,162,39,.42);
  --line-ink:rgba(11,37,69,.12);
  --line-light:rgba(230,238,247,.14);
  --text-on-dark:#C6D6E6;
  --text-on-dark-dim:#8FA6BC;

  --radius-s:4px;
  --radius-m:8px;
  --shell:1180px;

  --font-sans:"HarmonyOS Sans SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:124px}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--coral);outline-offset:2px;border-radius:2px}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100%;
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(14,124,102,.10), transparent 62%),
    radial-gradient(900px 460px at 2% 14%, rgba(11,37,69,.07), transparent 60%),
    var(--mist);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-weight:700;letter-spacing:.02em;line-height:1.35;color:var(--abyss)}
h1{font-size:34px}
h2{font-size:26px}
h3{font-size:20px}
h4{font-size:16px}

p{font-size:16px;line-height:1.9}
small{font-size:12px;color:var(--grey)}

a{color:var(--emerald);text-decoration:none}
a:hover{color:var(--hull-soft)}

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

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--emerald);
}

.prose{max-width:72ch;color:#16202A}
.prose p{margin-bottom:20px}
.prose p:last-child{margin-bottom:0}
.prose strong{color:var(--abyss)}

/* ---------- 4. 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}

.section{padding:72px 0}
.stack{display:grid;gap:24px}

.grid{display:grid;gap:32px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--4-8{grid-template-columns:4fr 8fr}
.grid--7-5{grid-template-columns:7fr 5fr}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-80px;
  z-index:200;
  padding:10px 18px;
  border-radius:0 0 var(--radius-s) var(--radius-s);
  background:var(--gold);
  color:var(--abyss);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  text-decoration:none;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:0;color:var(--abyss)}

/* ---------- 6. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  border:1px solid transparent;
  border-radius:6px;
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn--sm{padding:9px 16px;font-size:12px;letter-spacing:.06em}
.btn--block{width:100%}

.btn--primary{
  background:linear-gradient(135deg,#0E7C66 0%,#12A184 100%);
  color:#fff;
  box-shadow:0 8px 20px -10px rgba(14,124,102,.75);
}
.btn--primary:hover{background:linear-gradient(135deg,#12A184 0%,#0E7C66 100%);color:#fff;transform:translateY(-1px)}

.btn--ghost{
  background:rgba(230,238,247,.06);
  color:var(--text-on-dark);
  border-color:var(--line-gold);
}
.btn--ghost:hover{color:#fff;border-color:var(--gold-lite);background:rgba(201,162,39,.14)}

.btn:focus-visible{outline:2px solid var(--coral);outline-offset:2px}

/* ---------- 7. 堆叠画板 / 分隔 / 面板 ---------- */
.panel{
  position:relative;
  padding:32px;
  border:1px solid var(--line-ink);
  border-radius:var(--radius-m);
  background:var(--white);
  box-shadow:0 1px 0 rgba(11,37,69,.04),0 24px 48px -40px rgba(11,37,69,.7);
}
.panel--tint{background:linear-gradient(160deg,#F4F8FC 0%,var(--shallow) 100%)}
.panel--glass{
  background:rgba(250,251,252,.74);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-color:var(--line-gold);
}
.panel--dark{
  background:linear-gradient(155deg,var(--abyss) 0%,var(--hull) 100%);
  border-color:var(--line-gold);
  color:var(--text-on-dark);
}
.panel--dark h2,.panel--dark h3{color:#fff}

.panel__label{
  display:block;
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--gold);
}
.panel__title{font-size:20px;margin-bottom:12px}
.panel__text{font-size:16px;line-height:1.9;color:#22303C}
.panel--dark .panel__text{color:var(--text-on-dark)}

.rule{
  display:flex;
  align-items:center;
  gap:14px;
  margin:48px 0 28px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--gold);
}
.rule::after{
  content:"";
  flex:1 1 auto;
  height:1px;
  background:linear-gradient(90deg,rgba(201,162,39,.75),rgba(201,162,39,0));
}

/* ---------- 8. 面包屑 ---------- */
.crumbs{padding:24px 0 0}
.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--grey);
}
.crumbs__item{display:inline-flex;align-items:center;gap:8px}
.crumbs__link{
  color:var(--grey);
  text-decoration:none;
  border-bottom:1px solid rgba(90,106,120,.35);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.crumbs__link:hover{color:var(--emerald);border-bottom-color:var(--emerald)}
.crumbs__sep{color:rgba(201,162,39,.85)}

/* ---------- 9. 图形占位容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line-gold);
  border-radius:var(--radius-m);
  background:linear-gradient(150deg,var(--shallow) 0%,var(--mist) 100%);
}
.media-frame__inner{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  background:
    linear-gradient(180deg,rgba(11,37,69,.05),rgba(11,37,69,0)),
    repeating-linear-gradient(90deg,rgba(11,37,69,.06) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(0deg,rgba(11,37,69,.06) 0 1px,transparent 1px 48px);
}
.media-frame--tall .media-frame__inner{aspect-ratio:4 / 5}
.media-frame__inner img,
.media-frame__inner svg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__caption{
  padding:12px 16px;
  border-top:1px solid var(--line-ink);
  background:rgba(250,251,252,.92);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--grey);
}

/* ---------- 10. 双层页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,var(--abyss) 0%,var(--hull) 100%);
  color:var(--shallow);
  border-bottom:1px solid var(--line-gold);
  box-shadow:0 18px 40px -32px rgba(11,37,69,.95);
}
.site-header::before{
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(90deg,var(--emerald-lite) 0%,var(--gold) 46%,rgba(201,162,39,0) 100%);
}

.header-top{border-bottom:1px solid var(--line-light)}
.header-top__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:56px;
  padding-top:10px;
  padding-bottom:10px;
  transition:min-height var(--dur) var(--ease),padding var(--dur) var(--ease);
}
.site-header[data-condensed] .header-top__inner{min-height:40px;padding-top:2px;padding-bottom:2px}
.site-header[data-condensed] .brand-mark__desc,
.site-header[data-condensed] .meta-chip{display:none}

.brand-mark{display:flex;align-items:center;gap:14px;min-width:0}
.brand-mark__glyph{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  border:1px solid var(--line-gold);
  border-radius:6px;
  background:linear-gradient(140deg,rgba(14,124,102,.42) 0%,rgba(11,37,69,0) 72%);
  color:var(--gold-lite);
  font-family:var(--font-mono);
  font-size:16px;
  font-weight:700;
  letter-spacing:.04em;
}
.brand-mark__text{display:block;min-width:0}
.brand-mark__link{
  display:block;
  color:#fff;
  font-size:20px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.4;
}
.brand-mark__link:hover{color:var(--gold-lite)}
.brand-mark__desc{
  display:block;
  font-size:12px;
  line-height:1.6;
  color:#9DB4CC;
  letter-spacing:.04em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.header-top__meta{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:12px;
  flex-wrap:wrap;
}
.meta-chip{
  padding:3px 10px;
  border:1px solid var(--line-light);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:#9DB4CC;
  white-space:nowrap;
}
.meta-chip .mono{color:var(--gold-lite)}
.lang-mark{
  padding-left:12px;
  border-left:1px solid var(--line-light);
  font-size:12px;
  letter-spacing:.1em;
  color:#9DB4CC;
}
.header-feedback{
  font-size:14px;
  color:var(--gold-lite);
  text-decoration:none;
  border-bottom:1px solid rgba(240,217,138,.5);
  padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.header-feedback:hover{color:#fff;border-bottom-color:#fff}

.header-main{position:relative}
.header-main__inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:64px;
  padding-top:8px;
  padding-bottom:8px;
  transition:min-height var(--dur) var(--ease);
}
.site-header[data-condensed] .header-main__inner{min-height:52px;padding-top:6px;padding-bottom:6px}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  border:1px solid var(--line-gold);
  border-radius:6px;
  background:rgba(230,238,247,.06);
  color:var(--shallow);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--gold-lite);background:rgba(201,162,39,.16)}
.nav-toggle__icon{position:relative;display:block;width:16px;height:12px}
.nav-toggle__bar{
  position:absolute;
  left:0;
  width:16px;
  height:1px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle__bar:nth-child(1){top:0}
.nav-toggle__bar:nth-child(2){top:5px}
.nav-toggle__bar:nth-child(3){top:10px}
.nav-toggle[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[data-open] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{
  display:flex;
  align-items:stretch;
  gap:4px;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.site-nav__list::-webkit-scrollbar{display:none}
.site-nav__item{flex:0 0 auto}
.site-nav__link{
  display:block;
  padding:12px 14px;
  border-bottom:2px solid transparent;
  border-radius:var(--radius-s) var(--radius-s) 0 0;
  color:#D7E3F0;
  font-size:16px;
  line-height:1.4;
  white-space:nowrap;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.site-nav__link:hover{
  color:#fff;
  background:rgba(111,211,188,.10);
  border-bottom-color:rgba(201,162,39,.55);
}
.site-nav__link[aria-current="page"]{
  color:#fff;
  border-bottom-color:var(--gold);
  background:linear-gradient(180deg,rgba(201,162,39,.20) 0%,rgba(201,162,39,0) 100%);
}
.site-nav__link:focus-visible{outline:2px solid var(--coral);outline-offset:2px}

.header-actions{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:10px;
}

.scroll-rail{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(230,238,247,.14);
  overflow:hidden;
}
.scroll-rail__fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--emerald-lite) 0%,var(--gold) 100%);
  transition:width 120ms linear;
}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:96px;
  background:linear-gradient(180deg,var(--abyss) 0%,#081A31 100%);
  color:var(--text-on-dark);
  border-top:1px solid var(--line-gold);
}
.footer-rail{
  display:block;
  height:3px;
  background:linear-gradient(90deg,var(--emerald-lite) 0%,var(--gold) 46%,rgba(201,162,39,0) 100%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:40px;
  padding-top:56px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line-light);
}

.footer-brand__mark{
  margin-bottom:10px;
  color:#fff;
  font-size:20px;
  font-weight:700;
  letter-spacing:.02em;
}
.footer-brand__note{
  max-width:36ch;
  margin-bottom:26px;
  font-size:14px;
  line-height:1.9;
  color:#9DB4CC;
}
.footer-contact__title{
  margin-bottom:12px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--emerald-lite);
}
.contact-list{display:grid;gap:10px}
.contact-list__item{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:12px;
  align-items:start;
  font-size:14px;
  line-height:1.7;
  color:var(--text-on-dark);
}
.contact-list__key{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--gold);
  padding-top:2px;
}
.contact-list__val{word-break:break-word}

.footer-index{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.footer-index__title{
  margin-bottom:14px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--emerald-lite);
}
.footer-index__list{display:grid;gap:8px}
.footer-index__list a{
  font-size:14px;
  color:var(--text-on-dark);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-index__list a:hover{color:var(--gold-lite);border-bottom-color:rgba(240,217,138,.6)}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-top:20px;
  padding-bottom:32px;
  font-size:12px;
  color:var(--text-on-dark-dim);
}
.footer-bottom__note{
  max-width:58ch;
  font-size:12px;
  line-height:1.9;
  color:var(--text-on-dark-dim);
}
.footer-bottom__meta{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  font-size:12px;
  color:#9DB4CC;
}
.footer-bottom__sep{color:var(--gold)}

/* ---------- 12. 显现动效 ---------- */
[data-reveal-ready]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 400ms var(--ease),transform 400ms var(--ease);
}
[data-reveal-ready].is-visible{opacity:1;transform:none}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:32px}
}

@media (max-width:900px){
  .shell{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}

  .grid--2,.grid--3,.grid--5-7,.grid--4-8,.grid--7-5{grid-template-columns:1fr}
  .grid{gap:24px}

  .site-header{scroll-padding-top:112px}
  .header-main__inner{min-height:56px}
  .site-header[data-condensed] .header-main__inner{min-height:52px}

  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    z-index:5;
    max-height:0;
    overflow:hidden;
    opacity:0;
    visibility:hidden;
    background:linear-gradient(180deg,var(--abyss) 0%,var(--hull) 100%);
    border-top:1px solid var(--line-gold);
    border-bottom:1px solid var(--line-gold);
    box-shadow:0 24px 40px -28px rgba(0,0,0,.8);
    transition:max-height var(--dur) var(--ease),opacity var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .site-nav[data-open]{
    max-height:72vh;
    overflow-y:auto;
    opacity:1;
    visibility:visible;
  }
  .site-nav__list{flex-direction:column;gap:0;padding:6px 0;overflow:visible}
  .site-nav__item{flex:1 1 auto;width:100%}
  .site-nav__link{
    padding:14px 20px;
    border-bottom:none;
    border-left:3px solid transparent;
    border-radius:0;
  }
  .site-nav__link:hover{background:rgba(111,211,188,.10);border-bottom-color:transparent;border-left-color:rgba(201,162,39,.55)}
  .site-nav__link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(201,162,39,.22) 0%,rgba(201,162,39,0) 100%);
    border-left-color:var(--gold);
    border-bottom-color:transparent;
  }

  .header-actions{margin-left:auto}
  .footer-grid{grid-template-columns:1fr 1fr;padding-top:44px;padding-bottom:32px;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .site-footer{margin-top:64px}
}

@media (max-width:720px){
  .meta-chip:first-child{display:none}
}

@media (max-width:640px){
  h1{font-size:26px}
  h2{font-size:20px}
  .panel{padding:24px}
  .header-top__inner{min-height:48px}
  .brand-mark__desc{display:none}
  .meta-chip{display:none}
  .header-actions .btn--ghost{display:none}
  .footer-index{grid-template-columns:1fr}
  .contact-list__item{grid-template-columns:1fr;gap:2px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

@media (max-width:480px){
  .shell{padding-left:16px;padding-right:16px}
  .section{padding:44px 0}
  .brand-mark__glyph{width:34px;height:34px;font-size:14px}
  .brand-mark__link{font-size:16px}
  .btn--sm{padding:8px 12px;font-size:12px;letter-spacing:.04em}
  .rule{margin:32px 0 20px}
}

/* ---------- 14. 降级与可访问性 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    transition-delay:0ms!important;
  }
  [data-reveal-ready]{opacity:1;transform:none}
  .btn--primary:hover{transform:none}
}