/* ============================================================
   安信10中心 — /assets/site.css
   共享外壳：reset / tokens / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. tokens ---------- */
:root{
  --ink-900:#0B1233;
  --ink-800:#131C4A;
  --ink-700:#1E2A6B;
  --cyan:#37E0D6;
  --amber:#FFB13C;
  --paper:#F5F1E6;
  --text:#E8ECFB;
  --muted:#A9B4DA;
  --violet:#7A4BD1;
  --wine:#B0245A;
  --teal:#0F766E;

  --line:rgba(169,180,218,.24);
  --line-strong:rgba(169,180,218,.44);
  --shadow-card:5px 5px 0 rgba(6,10,28,.55);
  --shadow-lift:9px 11px 0 rgba(6,10,28,.62);

  --radius:3px;
  --wrap:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.24s;

  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}

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

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 640px at 6% -12%,rgba(55,224,214,.10),transparent 62%),
    radial-gradient(940px 560px at 98% 4%,rgba(122,75,209,.16),transparent 64%),
    radial-gradient(780px 520px at 50% 114%,rgba(176,36,90,.13),transparent 66%);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,svg,video,canvas{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}

a{color:var(--cyan);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:.22em}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

::selection{background:rgba(55,224,214,.32);color:#04121a}

hr{border:0;border-top:1px solid var(--line);margin:2rem 0}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4,h5{
  margin:0 0 .62em;
  font-weight:800;
  line-height:1.28;
  letter-spacing:.015em;
  color:var(--paper);
}
h1{font-size:clamp(2.05rem,4.6vw,3.1rem);letter-spacing:.02em;line-height:1.2}
h2{font-size:clamp(1.45rem,2.6vw,1.95rem)}
h3{font-size:clamp(1.12rem,1.6vw,1.32rem)}
h4{font-size:1.02rem;font-weight:700}

p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}

ul,ol{margin:0 0 1.05em;padding-left:1.25em}
li{margin-bottom:.32em}
li:last-child{margin-bottom:0}

strong,b{font-weight:700;color:var(--paper)}

blockquote{
  margin:1.4rem 0;
  padding:.9rem 1.2rem;
  border-left:3px solid var(--cyan);
  background:rgba(30,42,107,.4);
  color:var(--muted);
}

/* ---------- 4. 工具类 ---------- */
.wrap{
  width:min(100% - 2rem,var(--wrap));
  margin-inline:auto;
}

.mono{
  font-family:var(--font-mono);
  font-size:.82em;
  letter-spacing:.12em;
  font-variant-numeric:tabular-nums;
}

.text-muted{color:var(--muted)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  margin:0 0 .85rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:currentColor;
  opacity:.75;
}

.rule{
  height:1px;
  border:0;
  margin:2.2rem 0;
  background:linear-gradient(90deg,var(--line-strong),rgba(169,180,218,.06) 70%,transparent);
}

.skip-link{
  position:absolute;
  left:50%;
  top:-4rem;
  z-index:200;
  transform:translateX(-50%);
  padding:.6rem 1.15rem;
  border-radius:0 0 var(--radius) var(--radius);
  background:var(--cyan);
  color:#04121a;
  font-size:.88rem;
  font-weight:700;
  letter-spacing:.06em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0;text-decoration:none}

main{display:block}
#main-content{scroll-margin-top:6rem}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  padding:.58rem 1.05rem;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  background:transparent;
  color:var(--text);
  font-size:.86rem;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.2;
  white-space:nowrap;
  cursor:pointer;
  text-decoration:none;
  transition:transform .18s var(--ease),background .18s var(--ease),
             border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-2px);text-decoration:none}
.btn:active{transform:translateY(0)}

.btn--primary{
  background:var(--amber);
  border-color:var(--amber);
  color:#2A1704;
  box-shadow:3px 3px 0 rgba(6,10,28,.6);
}
.btn--primary:hover{background:#FFC264;border-color:#FFC264;color:#2A1704}

.btn--ghost{
  border-color:rgba(55,224,214,.5);
  color:var(--cyan);
}
.btn--ghost:hover{background:rgba(55,224,214,.12);border-color:var(--cyan)}

.btn--paper{
  background:var(--paper);
  border-color:#CFC7B2;
  color:#141A33;
}

.link-more{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding-bottom:.15rem;
  border-bottom:1px solid rgba(55,224,214,.35);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.14em;
  color:var(--cyan);
  text-decoration:none;
}
.link-more::after{content:"→";transition:transform .18s var(--ease)}
.link-more:hover{text-decoration:none;border-bottom-color:var(--cyan)}
.link-more:hover::after{transform:translateX(4px)}

/* ---------- 6. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(19,28,74,.98),rgba(11,18,51,.97));
  border-bottom:1px solid var(--line-strong);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}

/* 刊头 */
.masthead{
  max-height:220px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  transition:max-height .3s var(--ease),opacity .22s var(--ease),
             border-color .3s var(--ease);
}
.masthead__inner{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.4rem;
  padding:.95rem 0 .8rem;
  text-align:center;
}
.masthead__eyebrow{
  margin:0;
  font-family:var(--font-mono);
  font-size:clamp(.6rem,1.6vw,.7rem);
  letter-spacing:.4em;
  text-transform:uppercase;
  color:var(--muted);
}
.masthead__brand{
  margin:0;
  font-size:clamp(1.65rem,4.4vw,2.5rem);
  font-weight:900;
  letter-spacing:.16em;
  line-height:1.1;
  color:var(--paper);
  text-decoration:none;
  text-shadow:3px 3px 0 rgba(55,224,214,.2);
  transition:color var(--dur) var(--ease),text-shadow var(--dur) var(--ease);
}
.masthead__brand:hover{
  text-decoration:none;
  color:#fff;
  text-shadow:3px 3px 0 rgba(255,177,60,.32);
}

.masthead__ticker{
  width:100%;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.masthead__ticker::-webkit-scrollbar{display:none}

.masthead__track{
  display:inline-flex;
  align-items:baseline;
  gap:1.7rem;
  padding:.1rem .6rem;
  white-space:nowrap;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.1em;
  color:var(--muted);
}
.masthead__item{position:relative;display:inline-flex;align-items:baseline;gap:.45rem}
.masthead__item + .masthead__item::before{
  content:"";
  position:absolute;
  left:-.92rem;
  top:50%;
  width:1px;
  height:.95em;
  transform:translateY(-50%);
  background:var(--line-strong);
}
.masthead__item b{color:var(--cyan);font-weight:500}

/* 栏目条 */
.site-header__bar{position:relative;background:rgba(11,18,51,.6)}

.site-header__bar-inner{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  width:min(100% - 2rem,var(--wrap));
  min-height:58px;
  margin-inline:auto;
}

.nav{display:block}
.nav__list{
  display:flex;
  align-items:center;
  gap:.1rem;
  margin:0;
  padding:0;
  list-style:none;
}
.nav__link{
  display:inline-block;
  padding:.78rem .95rem;
  border-bottom:2px solid transparent;
  font-size:.94rem;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--text);
  text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.nav__link:hover{
  color:var(--cyan);
  background:rgba(55,224,214,.07);
  text-decoration:none;
}
.nav__link[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
  background:rgba(55,224,214,.06);
}

.site-header__actions{
  position:absolute;
  right:0;
  top:50%;
  display:flex;
  align-items:center;
  gap:.6rem;
  transform:translateY(-50%);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.58rem .8rem;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  background:transparent;
  color:var(--text);
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{
  position:relative;
  display:inline-block;
  width:18px;
  height:10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease),top .2s var(--ease),bottom .2s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:4px;transform:rotate(-45deg)}

.read-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  overflow:hidden;
  background:rgba(169,180,218,.14);
}
.read-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transition:width .12s linear;
}

/* 压缩态 */
.site-header.is-compact .masthead{
  max-height:0;
  opacity:0;
  border-bottom-color:transparent;
}
.site-header.is-compact .site-header__bar-inner{min-height:52px}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  border-top:1px solid var(--line-strong);
  background:linear-gradient(180deg,rgba(19,28,74,.85),rgba(11,18,51,.99));
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--violet),var(--wine),var(--amber));
}
.site-footer__grid{
  display:grid;
  grid-template-columns:1.45fr 1fr 1fr 1.25fr;
  gap:2.2rem;
  padding:clamp(2.2rem,5vw,3.4rem) 0 1.8rem;
}
.site-footer__col{min-width:0}
.site-footer__brand{
  display:block;
  margin-bottom:.6rem;
  font-size:1.3rem;
  font-weight:900;
  letter-spacing:.14em;
  color:var(--paper);
  text-decoration:none;
}
.site-footer__brand:hover{text-decoration:none;color:var(--cyan)}
.site-footer__line{
  margin:0 0 .3rem;
  font-size:.72rem;
  color:var(--muted);
}
.site-footer__title{
  margin:0 0 .9rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.site-footer__list{
  margin:0;
  padding:0;
  list-style:none;
  font-size:.92rem;
}
.site-footer__list li{margin-bottom:.5rem;color:var(--text)}
.site-footer__list a{color:var(--text)}
.site-footer__list a:hover{color:var(--cyan);text-decoration:none}
.site-footer__list--plain li{
  color:var(--muted);
  font-size:.86rem;
  line-height:1.7;
}
.site-footer__list--plain .mono{color:var(--text);display:inline-block;margin-top:.1rem}
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.6rem;
  padding:1rem 0 1.7rem;
  border-top:1px solid var(--line);
  color:var(--muted);
}
.site-footer__base p{
  margin:0;
  font-size:.72rem;
}

/* ---------- 8. 基础组件 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  padding:1.1rem 0 .2rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--muted);
}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--cyan);text-decoration:none}
.crumbs__sep{color:var(--line-strong)}

.grid{display:grid;gap:clamp(1.25rem,3vw,2.2rem)}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--8-4{grid-template-columns:8fr 4fr}
.grid--4-5-3{grid-template-columns:4fr 5fr 3fr}
.grid--halves{grid-template-columns:1fr 1fr}
.grid--thirds{grid-template-columns:repeat(3,1fr)}

.panel{
  position:relative;
  padding:clamp(1.1rem,2.4vw,1.7rem);
  border:1px solid var(--line-strong);
  border-left-width:1px;
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(30,42,107,.7),rgba(19,28,74,.88));
  box-shadow:var(--shadow-card);
}
.panel--lift{box-shadow:var(--shadow-lift)}
.panel--accent{border-left:3px solid var(--cyan)}
.panel--violet{border-left:3px solid var(--violet)}
.panel--wine{border-left:3px solid var(--wine)}
.panel--teal{border-left:3px solid var(--teal)}
.panel--amber{border-left:3px solid var(--amber)}

.paper{
  position:relative;
  padding:clamp(1.1rem,2.4vw,1.7rem);
  border:1px solid #CFC7B2;
  border-radius:var(--radius);
  background:var(--paper);
  color:#141A33;
  box-shadow:var(--shadow-card);
}
.paper::after{
  content:"";
  position:absolute;
  left:6px;
  top:6px;
  right:-6px;
  bottom:-6px;
  z-index:-1;
  border:1px solid rgba(245,241,230,.22);
  border-radius:var(--radius);
  background:rgba(245,241,230,.05);
}
.paper h2,.paper h3,.paper h4{color:#0F1533}
.paper .text-muted{color:#5A6180}
.paper .mono{color:#3B4166}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.24rem .55rem;
  border:1px solid currentColor;
  border-radius:2px;
  background:rgba(169,180,218,.08);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.12em;
  line-height:1.4;
  white-space:nowrap;
}
.tag--cyan{color:var(--cyan);background:rgba(55,224,214,.1)}
.tag--amber{color:var(--amber);background:rgba(255,177,60,.1)}
.tag--violet{color:#B79BF0;background:rgba(122,75,209,.2)}
.tag--wine{color:#FF8AA9;background:rgba(176,36,90,.22)}
.tag--teal{color:#5FD8CD;background:rgba(15,118,110,.26)}

.note{
  margin:0;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  line-height:1.9;
  color:var(--muted);
}
.note__label{
  display:block;
  margin-bottom:.3rem;
  color:var(--cyan);
  letter-spacing:.2em;
}

.rail{
  position:relative;
  padding-left:1rem;
  border-left:1px solid var(--line);
  list-style:none;
  margin:0;
}
.rail li{margin:0}
.rail__link{
  display:block;
  padding:.42rem 0 .42rem .5rem;
  margin-left:-1.05rem;
  border-left:2px solid transparent;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.1em;
  color:var(--muted);
  text-decoration:none;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.rail__link:hover{color:var(--text);text-decoration:none}
.rail__link.is-active{
  color:var(--cyan);
  border-left-color:var(--cyan);
}

/* 图片容器 */
.frame{
  position:relative;
  display:block;
  overflow:hidden;
  margin:0;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  background:linear-gradient(140deg,var(--ink-800),var(--ink-900));
}
.frame > img,
.frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.frame--16x9{aspect-ratio:16/9}
.frame--3x2{aspect-ratio:3/2}
.frame--4x3{aspect-ratio:4/3}
.frame--1x1{aspect-ratio:1/1}
.frame--3x4{aspect-ratio:3/4}
.frame--tall{aspect-ratio:2/3}
.frame--duotone::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(160deg,rgba(55,224,214,.16),rgba(122,75,209,.22) 55%,rgba(11,18,51,.5));
}
.frame__cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:.7rem .85rem;
  background:linear-gradient(180deg,transparent,rgba(11,18,51,.9));
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.12em;
  color:var(--muted);
}
.frame--placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:180px;
}
.frame--placeholder::before{
  content:"档案图像";
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.24em;
  color:var(--line-strong);
}

/* 入场显现 */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1100px){
  .site-footer__grid{grid-template-columns:1.4fr 1fr 1fr;gap:1.8rem}
}

@media (max-width:1023px){
  .site-header__bar-inner{
    position:static;
    justify-content:flex-end;
    min-height:54px;
  }
  .site-header__actions{
    position:static;
    transform:none;
    margin-left:auto;
  }
  .nav-toggle{display:inline-flex}

  .nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    z-index:90;
    max-height:calc(100vh - 140px);
    overflow-y:auto;
    border-bottom:1px solid var(--line-strong);
    background:linear-gradient(180deg,rgba(19,28,74,.99),rgba(11,18,51,.99));
    box-shadow:0 18px 34px rgba(4,8,24,.55);
  }
  .nav[data-open]{display:block}
  .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:.5rem 1rem 1.1rem;
  }
  .nav__link{
    display:block;
    padding:.9rem .6rem;
    border-bottom:1px solid var(--line);
    border-left:3px solid transparent;
    font-size:1rem;
  }
  .nav__link[aria-current="page"]{
    border-bottom-color:var(--line);
    border-left-color:var(--cyan);
    background:rgba(55,224,214,.08);
  }
  .site-header.is-compact .site-header__bar-inner{min-height:52px}
}

@media (max-width:940px){
  .grid--7-5,
  .grid--8-4,
  .grid--4-5-3,
  .grid--halves,
  .grid--thirds{grid-template-columns:1fr}
}

@media (max-width:900px){
  .site-footer__grid{grid-template-columns:1fr 1fr}
}

@media (max-width:640px){
  body{font-size:16px}
  .masthead__inner{padding:.8rem 0 .7rem}
  .masthead__track{font-size:.66rem;gap:1.3rem}
  .nav-toggle__label{display:none}
  .nav-toggle{padding:.55rem .65rem}
  .site-header__actions .btn{padding:.5rem .7rem;font-size:.8rem}
  .site-footer__grid{grid-template-columns:1fr;gap:1.6rem}
  .site-footer__base{justify-content:flex-start}
  .paper::after{display:none}
}

/* ---------- 10. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .read-progress__bar{transition:none}
}