/* =========================================================
   portal-speed365.com.cn · /assets/site.css
   Site Kit — 戈壁晨光 / 坐标即门牌
   共享层：reset · 变量 · 中文排版 · 头部 · 页脚 · 通用件
   ========================================================= */

/* ---------- 1 · Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

/* ---------- 2 · 变量 ---------- */
:root{
  /* 沙岩 · 丝路橙红 · 深墨蓝 */
  --c-sand:#F6F0E6;
  --c-sand-lift:#FBF7F0;
  --c-sand-mid:#E6D9C6;
  --c-sand-gray:#8C7B68;
  --c-orange:#C2410C;
  --c-orange-lit:#EA580C;
  --c-amber:#FDE8B5;
  --c-ink:#102A43;
  --c-ink-2:#1F3A5F;
  --c-brown:#7C2D12;
  --c-paper:#FFFFFF;

  --c-line:rgba(16,42,67,.14);
  --c-line-soft:rgba(16,42,67,.08);
  --c-on-ink:rgba(246,240,230,.78);
  --c-on-ink-dim:rgba(230,217,198,.56);

  --f-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --f-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --f-serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --f-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,monospace;

  --shell:min(1320px, 100% - 3rem);
  --gap:1.5rem;
  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --r-pill:999px;

  --shadow-soft:0 1px 0 rgba(16,42,67,.04),0 18px 40px -30px rgba(16,42,67,.5);
  --shadow-lift:0 22px 46px -30px rgba(16,42,67,.55);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --ease-slow:520ms cubic-bezier(.2,.7,.3,1);
}

/* ---------- 3 · 基础排版 ---------- */
body{
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink);
  background-color:var(--c-sand);
  background-image:
    radial-gradient(90% 55% at 8% 0%,rgba(253,232,181,.55) 0%,rgba(253,232,181,0) 62%),
    radial-gradient(70% 45% at 100% 4%,rgba(230,217,198,.55) 0%,rgba(230,217,198,0) 70%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:800;line-height:1.24;letter-spacing:-.01em;color:var(--c-ink)}
h1{font-size:clamp(1.85rem,3.6vw,3rem)}
h2{font-size:clamp(1.4rem,2.5vw,2rem)}
h3{font-size:clamp(1.08rem,1.6vw,1.28rem);font-weight:700}
p{max-width:68ch}
strong{font-weight:700;color:var(--c-ink)}

:focus-visible{outline:2px solid var(--c-orange);outline-offset:3px;border-radius:6px}
::selection{background:var(--c-amber);color:var(--c-brown)}

/* ---------- 4 · 跳转链接 ---------- */
.skip-link{
  position:fixed;left:1rem;top:-120px;z-index:999;
  display:inline-block;padding:.7rem 1.25rem;
  background:var(--c-ink);color:var(--c-sand-lift);
  border-radius:var(--r-pill);
  font-family:var(--f-mono);font-size:.78rem;letter-spacing:.06em;
  box-shadow:0 18px 34px -22px rgba(16,42,67,.9);
  transition:top var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:1rem;color:var(--c-sand-lift)}

/* ---------- 5 · 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,247,240,.94);
  border-bottom:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{
  background:rgba(251,247,240,.99);
  box-shadow:0 16px 34px -28px rgba(16,42,67,.85);
}

/* 5.1 经纬条纹带 */
.header-rail{
  background:var(--c-ink);
  color:var(--c-sand-mid);
  font-family:var(--f-mono);
  font-size:.68rem;
  letter-spacing:.09em;
  text-transform:uppercase;
}
.rail-inner{
  width:var(--shell);margin-inline:auto;
  display:flex;align-items:center;gap:1.4rem;
  min-height:34px;padding-block:.32rem;
  overflow:hidden;
}
.rail-coord{flex:none;font-weight:700;color:var(--c-orange-lit)}
.rail-domain{flex:none;color:var(--c-sand-lift)}
.rail-path{flex:none;color:var(--c-on-ink-dim)}
.rail-path::before{content:"◈";margin-right:.45rem;color:var(--c-orange-lit)}
.rail-utility{
  margin-left:auto;flex:none;
  color:rgba(230,217,198,.5);
  text-align:right;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* 5.2 命令栏主体 */
.header-main{position:relative}
.header-inner{
  width:var(--shell);margin-inline:auto;
  display:flex;align-items:center;gap:clamp(.9rem,2vw,2rem);
  min-height:76px;padding-block:.6rem;
}

.brand-mark{display:inline-flex;align-items:center;gap:.7rem;flex:none}
.brand-index{
  display:grid;place-items:center;
  width:48px;height:48px;border-radius:14px;
  background:var(--c-ink);color:var(--c-orange-lit);
  border:1px solid rgba(234,88,12,.42);
  font-family:var(--f-mono);font-weight:700;font-size:.86rem;letter-spacing:-.02em;
  transition:transform var(--ease),background var(--ease);
}
.brand-mark:hover .brand-index{background:var(--c-ink-2);transform:translateY(-2px)}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-name{font-family:var(--f-display);font-weight:800;font-size:1.06rem;letter-spacing:-.01em;color:var(--c-ink)}
.brand-tag{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.18em;color:var(--c-sand-gray)}

/* 5.3 主导航 */
.primary-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:.14rem}
.nav-item{flex:none}
.nav-link{
  display:inline-flex;align-items:baseline;gap:.4rem;
  padding:.5rem .74rem;border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:.86rem;font-weight:500;color:var(--c-ink-2);
  white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-num{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.08em;color:var(--c-sand-gray);transition:color var(--ease)}
.nav-link:hover{background:var(--c-sand-mid);color:var(--c-ink)}
.nav-link:hover .nav-num{color:var(--c-orange)}
.nav-link[aria-current="page"]{
  background:var(--c-ink);color:var(--c-sand-lift);border-color:var(--c-ink);
}
.nav-link[aria-current="page"] .nav-num{color:var(--c-orange-lit)}

/* 5.4 头部操作区 */
.header-action{display:flex;align-items:center;gap:.55rem;flex:none}

/* ---------- 6 · 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  font-family:var(--f-body);font-weight:600;font-size:.85rem;line-height:1.2;
  padding:.64rem 1.18rem;border-radius:var(--r-pill);
  border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.btn-primary{background:var(--c-orange);color:#fff;box-shadow:0 12px 24px -18px rgba(194,65,12,.95)}
.btn-primary:hover{background:var(--c-orange-lit);transform:translateY(-1px)}
.btn-primary:active{background:var(--c-brown);transform:none}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:rgba(16,42,67,.24)}
.btn-ghost:hover{background:var(--c-paper);border-color:var(--c-orange);color:var(--c-orange)}
.btn-ink{background:var(--c-ink);color:var(--c-sand-lift)}
.btn-ink:hover{background:var(--c-ink-2)}

/* ---------- 7 · 移动导航开关 ---------- */
.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  padding:.52rem .9rem;border-radius:var(--r-pill);
  border:1px solid rgba(16,42,67,.24);
  background:var(--c-paper);color:var(--c-ink);
  font-family:var(--f-mono);font-size:.72rem;letter-spacing:.1em;
  transition:background var(--ease),border-color var(--ease);
}
.nav-toggle:hover{border-color:var(--c-orange)}
.nav-toggle-bars{display:flex;flex-direction:column;justify-content:center;gap:3px;width:16px;height:14px}
.nav-toggle-bars span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform var(--ease),opacity var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) 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(-5px) rotate(-45deg)}
.nav-toggle-text{font-weight:500}

/* ---------- 8 · 滚动进度线 ---------- */
.scroll-meter{
  position:absolute;left:0;bottom:-1px;width:100%;height:2px;
  background:linear-gradient(90deg,var(--c-orange),var(--c-orange-lit));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 90ms linear;
  pointer-events:none;
}

/* ---------- 9 · 正文容器 / 面包屑 ---------- */
.main-shell{
  width:var(--shell);margin-inline:auto;
  padding-block:clamp(1.6rem,3vw,2.8rem) clamp(2.4rem,5vw,4.5rem);
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  padding-block:.4rem 1.2rem;
  font-family:var(--f-mono);font-size:.72rem;letter-spacing:.06em;color:var(--c-sand-gray);
}
.breadcrumb a{transition:color var(--ease)}
.breadcrumb a:hover{color:var(--c-orange)}
.breadcrumb-sep{color:var(--c-sand-mid)}
.breadcrumb [aria-current="page"]{color:var(--c-ink)}

/* ---------- 10 · 网格与区块 ---------- */
.grid{display:grid;gap:var(--gap)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-split{grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:clamp(1.4rem,3.6vw,3rem)}

.section{padding-block:clamp(1.8rem,4vw,3.2rem)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:.6rem 1.6rem;
  padding-bottom:1.1rem;margin-bottom:1.4rem;
  border-bottom:1px solid var(--c-line-soft);
}
.eyebrow{
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--c-orange);
}
.section-title{font-family:var(--f-display);font-weight:800;font-size:clamp(1.35rem,2.4vw,1.9rem);line-height:1.28}
.lede{font-family:var(--f-serif);font-size:1.02rem;line-height:1.9;color:var(--c-ink-2);max-width:56ch}

/* ---------- 11 · 卡片 / 标签 ---------- */
.card{
  background:var(--c-paper);
  border:1px solid var(--c-line-soft);
  border-radius:var(--r-lg);
  padding:clamp(1.05rem,2.2vw,1.7rem);
  box-shadow:var(--shadow-soft);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(194,65,12,.28);box-shadow:var(--shadow-lift)}
.chip{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.26rem .72rem;border-radius:var(--r-pill);
  background:var(--c-sand-mid);color:var(--c-ink-2);
  font-family:var(--f-mono);font-size:.67rem;letter-spacing:.07em;
}
.chip-accent{background:var(--c-amber);color:var(--c-brown);border:1px solid rgba(124,45,18,.16)}

/* ---------- 12 · 数据与表格 ---------- */
.mono-num{
  font-family:var(--f-mono);font-weight:700;
  letter-spacing:.02em;font-variant-numeric:tabular-nums;
}
.data-table{font-size:.9rem}
.data-table th,.data-table td{text-align:left;padding:.72rem .9rem;border-bottom:1px solid var(--c-line-soft);vertical-align:top}
.data-table thead th{
  background:var(--c-ink);color:var(--c-sand-lift);
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;
  text-transform:uppercase;font-weight:600;border-bottom:0;
}
.data-table tbody tr:nth-child(even){background:var(--c-sand-lift)}
.data-table td.mono-num,.data-table th.mono-num{white-space:nowrap;color:var(--c-orange)}
.data-table thead th.mono-num{color:var(--c-amber)}

/* ---------- 13 · 媒体容器（供页面放图片） ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--c-line-soft);
  background:
    linear-gradient(135deg,rgba(230,217,198,.9),rgba(253,232,181,.55));
  aspect-ratio:16/10;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-caption{
  margin-top:.6rem;
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.07em;color:var(--c-sand-gray);
}

/* ---------- 14 · 行内链接 ---------- */
.link-inline{
  color:var(--c-orange);
  text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;
  transition:color var(--ease);
}
.link-inline:hover{color:var(--c-orange-lit)}

/* ---------- 15 · 进入视口显现协议 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(18px);
  transition:opacity var(--ease-slow),transform var(--ease-slow);
  will-change:opacity,transform;
}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 16 · 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(2.6rem,6vw,5rem);
  background:var(--c-ink);
  color:var(--c-on-ink);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(230,217,198,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(230,217,198,.075) 1px,transparent 1px);
  background-size:88px 88px;
  -webkit-mask-image:radial-gradient(125% 95% at 12% 0%,#000 0%,transparent 74%);
  mask-image:radial-gradient(125% 95% at 12% 0%,#000 0%,transparent 74%);
}
.site-footer::after{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--c-orange),var(--c-orange-lit) 45%,rgba(234,88,12,0) 100%);
  pointer-events:none;
}
.footer-inner{
  position:relative;z-index:1;
  width:var(--shell);margin-inline:auto;
  padding-block:clamp(2.4rem,5vw,3.8rem) 1.4rem;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr .8fr 1.25fr;
  gap:clamp(1.5rem,4vw,3.5rem);
}
.footer-brand{display:flex;flex-direction:column;gap:.55rem}
.footer-plate{
  font-family:var(--f-mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--c-orange-lit);
}
.footer-brand-name{
  font-family:var(--f-display);font-weight:800;font-size:1.5rem;letter-spacing:-.01em;
  color:var(--c-sand-lift);line-height:1.2;
}
.footer-summary{
  font-family:var(--f-serif);font-size:.94rem;line-height:1.85;
  color:var(--c-on-ink);max-width:36ch;
}
.footer-coord{
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.14em;
  color:var(--c-on-ink-dim);padding-top:.2rem;
}
.footer-col-title{
  font-family:var(--f-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--c-on-ink-dim);margin-bottom:.95rem;
}
.footer-links{display:flex;flex-direction:column;gap:.5rem}
.footer-link{
  display:inline-flex;align-items:baseline;gap:.5rem;
  font-size:.9rem;color:var(--c-on-ink);
  transition:color var(--ease);
}
.footer-link::before{content:"→";color:var(--c-orange-lit);font-size:.8rem}
.footer-link:hover{color:var(--c-sand-lift)}
.footer-contact{display:flex;flex-direction:column;gap:.7rem;margin-bottom:1.2rem}
.contact-row{display:flex;align-items:flex-start;gap:.7rem}
.contact-key{
  flex:none;width:3.2em;padding-top:.16rem;
  font-family:var(--f-mono);font-size:.64rem;letter-spacing:.1em;
  color:var(--c-orange-lit);text-transform:uppercase;
}
.contact-val{font-size:.88rem;line-height:1.7;color:var(--c-on-ink);word-break:break-word}
.footer-cta{margin-top:.1rem}
.footer-base{
  margin-top:clamp(1.9rem,4vw,3rem);
  padding-top:1.1rem;
  border-top:1px solid rgba(230,217,198,.16);
  display:flex;flex-wrap:wrap;align-items:center;gap:.55rem 1.6rem;
  font-family:var(--f-mono);font-size:.7rem;letter-spacing:.05em;
  color:var(--c-on-ink-dim);
}
.footer-icp{color:var(--c-sand-mid)}
.footer-legal{display:flex;flex-wrap:wrap;gap:1.1rem;margin-left:auto}
.footer-legal a{transition:color var(--ease)}
.footer-legal a:hover{color:var(--c-orange-lit)}

/* ---------- 17 · 响应式 ---------- */
@media (max-width:1180px){
  .nav-link{padding:.46rem .58rem;font-size:.82rem}
  .nav-num{display:none}
  .header-inner{gap:1rem}
}
@media (max-width:900px){
  :root{--shell:calc(100% - 2rem)}
  html{scroll-padding-top:112px}
  .header-inner{min-height:66px}
  .brand-index{width:42px;height:42px;border-radius:12px;font-size:.78rem}
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    margin-left:0;
    padding:.7rem 1rem 1.1rem;
    background:var(--c-sand-lift);
    border-bottom:1px solid var(--c-line);
    box-shadow:0 26px 44px -34px rgba(16,42,67,.9);
  }
  .primary-nav[data-open]{display:block;animation:navDrop 220ms cubic-bezier(.2,.7,.3,1) both}
  .nav-list{flex-direction:column;align-items:stretch;gap:.12rem}
  .nav-link{
    display:flex;padding:.72rem .85rem;font-size:.95rem;
    border-radius:var(--r-sm);border-color:transparent;
  }
  .nav-num{display:inline;font-size:.64rem}
  .grid-2,.grid-3,.grid-split{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:1.8rem}
  .footer-brand{grid-column:1 / -1}
  .footer-legal{margin-left:0}
  .data-table{font-size:.84rem}
  .data-table th,.data-table td{padding:.62rem .6rem}
}
@media (max-width:640px){
  :root{--shell:calc(100% - 1.6rem)}
  body{font-size:15.5px}
  .rail-coord,.rail-utility{display:none}
  .rail-inner{min-height:30px;gap:1rem}
  .footer-grid{grid-template-columns:1fr}
  .footer-base{flex-direction:column;align-items:flex-start;gap:.45rem}
  .footer-legal{gap:.9rem}
  .nav-toggle-text{display:none}
  .nav-toggle{padding:.55rem .7rem}
}
@keyframes navDrop{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}

/* ---------- 18 · 动效偏好与打印 ---------- */
@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}
  .card:hover{transform:none}
  .btn-primary:hover{transform:none}
  .brand-mark:hover .brand-index{transform:none}
}
@media print{
  .site-header,.site-footer,.skip-link,.scroll-meter{display:none !important}
  body{background:#fff;color:#000}
}