/* ============================================================
   365国际速发 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

:root{
  --sea:#071A33;
  --ink:#0B2440;
  --cyan:#35F0D0;
  --orange:#FF7A2F;
  --violet:#8A6CFF;
  --paper:#F4EFE4;
  --brown:#241E1A;
  --white:#F5F9FF;
  --silver:#9FB3C8;
  --steel:#1E4D6B;

  --line:rgba(30,77,107,.85);
  --txt-72:rgba(245,249,255,.72);
  --txt-58:rgba(245,249,255,.58);

  --font-sans:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --font-serif:Georgia,"Times New Roman","Songti SC","Noto Serif SC",serif;

  --wrap-max:1440px;
  --gut:clamp(16px,3.4vw,48px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

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

body{
  margin:0;
  background:var(--sea);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(30,77,107,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,77,107,.16) 1px,transparent 1px);
  background-size:96px 96px;
  opacity:.42;
}

h1,h2,h3,h4,h5,h6,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block;max-width:100%}
table{border-collapse:collapse}

h1,h2,h3,h4{
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.16;
}

::selection{background:var(--cyan);color:var(--sea)}

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

#main-content{position:relative;z-index:1}

/* ---------- 容器与章节 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--gut);
}

.section{padding-block:clamp(48px,7vw,110px)}
.section--paper{background:var(--paper);color:var(--brown)}
.section--paper .prose{color:var(--brown)}
.section--paper h1,.section--paper h2,.section--paper h3{color:var(--brown)}

.eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;display:block}
.section--paper .eyebrow{color:#B5481A}

.prose{
  max-width:70ch;
  font-size:17px;
  line-height:1.8;
  color:var(--txt-72);
}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.5em;color:var(--white)}
.prose p+p{margin-top:1.05em}
.prose a{border-bottom:1px solid var(--cyan);color:var(--cyan)}

.paper{
  background:var(--paper);
  color:var(--brown);
  border:1px solid var(--brown);
  box-shadow:9px 9px 0 rgba(36,30,26,.4);
  padding:clamp(22px,3.4vw,44px);
}
.paper h2,.paper h3{font-family:var(--font-serif);letter-spacing:-.01em}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid var(--cyan);
  color:var(--cyan);
  font-size:15px;
  font-weight:800;
  letter-spacing:.04em;
  background:transparent;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn:hover{background:var(--cyan);color:var(--sea);transform:translateY(-2px)}
.btn--signal{background:var(--orange);border-color:var(--orange);color:#0A1930}
.btn--signal:hover{background:#FF9257;border-color:#FF9257;color:#0A1930}
.btn--ghost{border-color:var(--steel);color:var(--silver)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:transparent}

/* ---------- 徽标 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  color:var(--silver);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  line-height:1.6;
  white-space:nowrap;
}
.tag--cyan{color:var(--cyan);border-color:rgba(53,240,208,.5);background:rgba(53,240,208,.08)}
.tag--signal{color:#FFB78C;border-color:rgba(255,122,47,.5);background:rgba(255,122,47,.1)}
.tag--violet{color:#C3B4FF;border-color:rgba(138,108,255,.5);background:rgba(138,108,255,.1)}
.tag--paper{color:var(--brown);border-color:rgba(36,30,26,.6);background:transparent}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--silver);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--steel)}
.breadcrumb a{color:var(--silver);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}

/* ---------- 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  width:100%;
  border:1px solid var(--line);
  background:linear-gradient(135deg,var(--ink),#0F2C4C);
  overflow:hidden;
}
.media__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:16/10;
}
.media--wide .media__img{aspect-ratio:21/9}
.media--portrait .media__img{aspect-ratio:4/5}
.media--square .media__img{aspect-ratio:1/1}
.media__frame{
  position:relative;
  display:grid;
  place-items:center;
  aspect-ratio:16/10;
  background-image:repeating-linear-gradient(-45deg,rgba(53,240,208,.07) 0 12px,transparent 12px 24px);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel);
}
.media--portrait .media__frame{aspect-ratio:4/5}
.media--square .media__frame{aspect-ratio:1/1}
.media__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--white);
  background:linear-gradient(0deg,rgba(7,26,51,.92),rgba(7,26,51,0));
}

/* ---------- 滚动显现协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(18px) skewY(.5deg);
  transition:opacity .6s var(--ease),transform .7s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ============================================================
   头部
   ============================================================ */
.skip-link{
  position:absolute;
  left:50%;
  top:0;
  z-index:200;
  transform:translate(-50%,-160%);
  padding:10px 22px;
  background:var(--cyan);
  color:var(--sea);
  font-size:14px;
  font-weight:800;
  letter-spacing:.06em;
  border-radius:0 0 4px 4px;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}

.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,26,51,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  color:var(--white);
}

.header-shell{
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding:12px var(--gut);
  display:grid;
  grid-template-columns:minmax(0,auto) minmax(0,1fr);
  align-items:center;
  gap:12px clamp(16px,2.4vw,36px);
}

.header-rail{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,26px);
  min-width:0;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand-mark{
  flex:0 0 auto;
  width:34px;
  height:34px;
  padding:6px 5px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  align-items:end;
  gap:2px;
  border:1px solid var(--cyan);
  background:rgba(53,240,208,.06);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.brand:hover .brand-mark{background:rgba(53,240,208,.14);box-shadow:0 0 0 3px rgba(53,240,208,.14)}
.brand-mark__tick{display:block;width:100%;background:var(--cyan)}
.brand-mark__tick:nth-child(1){height:36%}
.brand-mark__tick:nth-child(2){height:66%;background:var(--orange)}
.brand-mark__tick:nth-child(3){height:100%}

.brand-text{display:flex;flex-direction:column;line-height:1.18;min-width:0}
.brand-name{
  font-size:17px;
  font-weight:900;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--silver);
  white-space:nowrap;
}

.rail-track{
  display:flex;
  align-items:center;
  gap:8px;
  padding-left:18px;
  border-left:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  white-space:nowrap;
}
.rail-track__label{color:var(--steel)}
.rail-track__value{color:var(--cyan);display:inline-flex;align-items:center}
.rail-track__value::before{
  content:"";
  width:6px;height:6px;
  margin-right:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(53,240,208,.16);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border:1px solid var(--line);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:12px}
.nav-toggle__bars span{
  position:absolute;left:0;
  width:100%;height:2px;
  background:currentColor;
  transition:transform .25s var(--ease),top .25s var(--ease);
}
.nav-toggle__bars span:nth-child(1){top:1px}
.nav-toggle__bars span:nth-child(2){top:9px}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){top:5px;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){top:5px;transform:rotate(-45deg)}

.site-nav{
  grid-column:2;
  justify-self:end;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  flex-wrap:wrap;
  gap:clamp(10px,1.8vw,26px);
}
.nav-list{display:flex;align-items:center;flex-wrap:wrap;gap:clamp(2px,1.2vw,16px)}
.nav-list a{
  position:relative;
  display:block;
  padding:10px 6px;
  font-size:15px;
  font-weight:600;
  color:var(--txt-72);
  transition:color .22s var(--ease);
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:6px;right:6px;bottom:4px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--ease);
}
.nav-list a:hover{color:var(--white)}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--cyan)}
.nav-list a[aria-current="page"]::after{transform:scaleX(1)}

.nav-tools{display:flex;align-items:center;gap:10px}
.nav-tool{
  display:inline-flex;
  align-items:center;
  padding:9px 15px;
  border:1px solid var(--line);
  color:var(--txt-72);
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
}
.nav-tool:hover{color:var(--cyan);border-color:var(--cyan);transform:translateY(-1px)}
.nav-tool--index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--silver);
}
.nav-tool--cta{
  background:var(--orange);
  border-color:var(--orange);
  color:#0A1930;
  font-weight:800;
}
.nav-tool--cta:hover{background:#FF9257;border-color:#FF9257;color:#0A1930}

.header-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--orange));
  transition:transform .12s linear;
  pointer-events:none;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(56px,8vw,120px);
  background:var(--ink);
  border-top:1px solid var(--line);
  color:var(--white);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 48%,var(--orange));
}

.footer-shell{
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding:clamp(38px,6vw,78px) var(--gut) clamp(22px,3vw,38px);
}

.footer-brand{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:8px 26px;
  padding-bottom:clamp(18px,2.6vw,26px);
  margin-bottom:clamp(26px,4vw,46px);
  border-bottom:1px solid var(--line);
}
.footer-brand__name{
  font-size:clamp(22px,3vw,32px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
}
.footer-brand__note{font-size:14px;color:var(--silver);letter-spacing:.02em}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(26px,4vw,46px);
}
.footer-col{min-width:0}
.footer-col__title{
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-col__title::before{content:"";width:14px;height:1px;background:var(--cyan);display:block}

.footer-links a{
  display:inline-block;
  padding:5px 0;
  font-size:15px;
  color:var(--txt-72);
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer-links a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-links--tight{margin-top:14px}

.footer-cycle{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:15px;
  line-height:1.6;
  color:rgba(245,249,255,.78);
}
.footer-cycle__dot{
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:8px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 4px rgba(255,122,47,.16);
  animation:pulse 2.6s ease-in-out infinite;
}
@keyframes pulse{
  50%{opacity:.45;box-shadow:0 0 0 9px rgba(255,122,47,.04)}
}

.footer-contact li{
  font-size:14px;
  line-height:1.7;
  color:var(--txt-72);
  word-break:break-word;
}
.footer-contact li+li{margin-top:11px}
.footer-contact__key{
  display:block;
  margin-bottom:2px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel);
}

.footer-icp{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--silver);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(32px,4vw,56px);
  padding-top:20px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--silver);
}
.footer-copy,.footer-note{font-size:12px;line-height:1.7}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1099px){
  .header-shell{grid-template-columns:minmax(0,1fr) auto}
  .nav-toggle{display:inline-flex;grid-column:2;justify-self:end}
  .site-nav{
    grid-column:1 / -1;
    justify-self:stretch;
    justify-content:flex-start;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-top:4px;
    padding-top:10px;
    border-top:1px solid var(--line);
  }
  .site-header[data-open] .site-nav{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-list li+li{border-top:1px solid rgba(30,77,107,.55)}
  .nav-list a{padding:14px 6px;font-size:16.5px;color:var(--white)}
  .nav-list a::after{display:none}
  .nav-list a[aria-current="page"]{
    color:var(--cyan);
    box-shadow:inset 3px 0 0 var(--cyan);
    padding-left:16px;
  }
  .nav-tools{flex-direction:column;align-items:stretch;gap:10px;margin:14px 0 6px}
  .nav-tool{justify-content:center}
}

@media (max-width:860px){
  .rail-track{display:none}
}

@media (max-width:560px){
  body{font-size:16px}
  .header-shell{padding-block:10px}
  .brand-name{font-size:16px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

@media (min-width:821px){
  .footer-grid{grid-template-columns:1.3fr 1fr 1.2fr 1fr}
}

@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}
  .header-progress{transition:none}
}