:root{
  --deep:#061A2B;
  --hull:#0C2C4A;
  --steel:#16456B;
  --paper:#F6F2E9;
  --mist:#E3ECF3;
  --orange:#FF6A2B;
  --orange-haze:#FFA36B;
  --cyan:#2FE3D0;
  --cyan-mist:#8FE9FF;
  --gray:#A9BACB;
  --ink:#43566A;

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

  --wrap-max:1240px;
  --gutter:clamp(16px,4vw,48px);
  --nav-break:1000px;

  --stack-dark:8px 8px 0 rgba(22,69,107,.55),16px 16px 0 rgba(22,69,107,.22);
  --stack-light:8px 8px 0 rgba(22,69,107,.14),16px 16px 0 rgba(22,69,107,.07);

  --dur:200ms;
  --ease:cubic-bezier(.2,.6,.3,1);
}

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

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
strong,b{font-weight:700;}
hr{border:0;height:1px;background:var(--steel);margin:0;}

::selection{background:var(--orange);color:var(--deep);}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:1px;
}

/* ---------- 通用容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.page-main{display:block;min-height:60vh;}

.section{
  padding-block:clamp(56px,8vw,112px);
  padding-inline:var(--gutter);
}
.section--dark{background:var(--deep);color:var(--ink);}
.section--dark{color:var(--gray);}
.section--paper{background:var(--paper);color:var(--ink);}
.is-dark{background:var(--deep);color:var(--gray);}

/* ---------- 标题与文本 ---------- */
.h-display{
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:94%;
  letter-spacing:-.02em;
  line-height:1.06;
  font-size:clamp(32px,5vw,58px);
  color:var(--deep);
}
.section--dark .h-display,
.is-dark .h-display{color:var(--paper);}

.lede{
  font-size:clamp(16.5px,1.3vw,19px);
  line-height:1.8;
  max-width:62ch;
  color:var(--ink);
}
.section--dark .lede,
.is-dark .lede{color:var(--gray);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--steel);
}
.eyebrow::before{
  content:"";
  width:16px;
  height:2px;
  background:var(--orange);
}
.section--dark .eyebrow,
.is-dark .eyebrow{color:var(--cyan);}

.mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--ink);
}
.crumbs a{
  color:var(--steel);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-color:rgba(47,227,208,.85);
  transition:color var(--dur) var(--ease);
}
.crumbs a:hover{color:var(--orange);}
.crumbs__sep{opacity:.45;}
.crumbs--dark{color:var(--gray);}
.crumbs--dark a{color:var(--cyan);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  line-height:1;
  padding:12px 18px;
  border:1px solid var(--steel);
  color:var(--paper);
  background:transparent;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.btn:hover{border-color:var(--cyan);color:var(--cyan);}
.btn--primary{
  background:var(--orange);
  border-color:var(--orange);
  color:var(--deep);
  font-weight:700;
}
.btn--primary:hover{
  background:var(--orange-haze);
  border-color:var(--orange-haze);
  color:var(--deep);
  transform:translateY(-1px);
}
.btn--ghost{
  background:rgba(47,227,208,.07);
  border-color:var(--steel);
  color:var(--cyan);
}
.btn--ghost:hover{
  border-color:var(--cyan);
  background:rgba(47,227,208,.14);
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.6;
  padding:3px 8px;
  border:1px solid rgba(47,227,208,.42);
  color:var(--cyan);
  background:rgba(47,227,208,.08);
}
.tag--orange{
  border-color:rgba(255,106,43,.5);
  color:var(--orange);
  background:rgba(255,106,43,.1);
}

/* ---------- 画板与信息牌 ---------- */
.panel{
  position:relative;
  background:var(--hull);
  border:1px solid var(--steel);
  padding:clamp(20px,3vw,36px);
  color:var(--gray);
}
.panel--raised{box-shadow:var(--stack-dark);}
.section--paper .panel,
.is-light .panel{
  background:var(--mist);
  border-color:rgba(6,26,43,.16);
  color:var(--ink);
}
.section--paper .panel--raised{box-shadow:var(--stack-light);}

.plate{
  position:relative;
  border:1px solid var(--steel);
  background:var(--hull);
  padding:18px 20px;
}
.plate::before,
.plate::after{
  content:"";
  position:absolute;
  width:11px;
  height:11px;
  pointer-events:none;
}
.plate::before{
  top:-1px;left:-1px;
  border-top:2px solid var(--orange);
  border-left:2px solid var(--orange);
}
.plate::after{
  right:-1px;bottom:-1px;
  border-right:2px solid var(--orange);
  border-bottom:2px solid var(--orange);
}

/* ---------- 栅格 ---------- */
.grid{
  display:grid;
  gap:clamp(16px,2.4vw,32px);
}
.grid--5-7{grid-template-columns:5fr 7fr;}
.grid--7-5{grid-template-columns:7fr 5fr;}
.grid--2{grid-template-columns:repeat(2,1fr);}
.grid--3{grid-template-columns:repeat(3,1fr);}

/* ---------- 纵向路径轨道 ---------- */
.track{
  position:relative;
  padding-left:clamp(22px,3vw,34px);
}
.track::before{
  content:"";
  position:absolute;
  left:7px;
  top:8px;
  bottom:8px;
  width:2px;
  background:linear-gradient(180deg,var(--cyan),rgba(47,227,208,.12));
}

/* ---------- 图片容器基础 ---------- */
.media{
  position:relative;
  overflow:hidden;
  background:var(--hull);
  border:1px solid var(--steel);
  isolation:isolate;
}
.media img,
.media picture,
.media picture img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--16x10{aspect-ratio:16/10;}
.media--4x3{aspect-ratio:4/3;}
.media--1x1{aspect-ratio:1/1;}
.media--tilt{transform:rotate(-6deg);}
.media--tilt-alt{transform:rotate(12deg);}
.media__placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:180px;
  width:100%;
  height:100%;
  background:
    radial-gradient(120% 90% at 12% 6%,rgba(47,227,208,.22),transparent 58%),
    radial-gradient(110% 90% at 92% 96%,rgba(255,106,43,.2),transparent 62%),
    linear-gradient(160deg,var(--hull),var(--deep));
  color:var(--gray);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
}
.media__caption{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--ink);
}

/* ================= 共享头部 ================= */
.skip-link{
  position:absolute;
  left:14px;
  top:-70px;
  z-index:300;
  display:inline-block;
  padding:10px 16px;
  background:var(--orange);
  color:var(--deep);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:10px;}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  width:100%;
  background:var(--deep);
  border-bottom:1px solid var(--steel);
}

.header__inner{
  position:relative;
  display:flex;
  align-items:stretch;
  width:100%;
  max-width:1320px;
  min-height:72px;
  margin-inline:auto;
}

.header__rail{
  flex:0 0 54px;
  width:54px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:10px;
  border-right:1px solid var(--steel);
  background:linear-gradient(180deg,var(--hull),var(--deep));
}
.header__rail-dot{
  width:6px;
  height:6px;
  background:var(--orange);
  box-shadow:0 0 10px rgba(255,106,43,.75);
}
.header__rail-line{
  width:1px;
  height:24px;
  background:linear-gradient(180deg,var(--cyan),rgba(47,227,208,0));
}
.header__rail-text{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--gray);
  writing-mode:vertical-rl;
}

.header__bar{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  min-width:0;
  padding:10px clamp(14px,3vw,32px);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand__name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:19px;
  letter-spacing:-.01em;
  color:var(--paper);
  white-space:nowrap;
  transition:color var(--dur) var(--ease);
}
.brand:hover .brand__name{color:var(--cyan);}
.brand__badge{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  line-height:1.5;
  padding:2px 6px;
  color:var(--cyan);
  background:rgba(47,227,208,.08);
  border:1px solid rgba(47,227,208,.34);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 12px;
  border:1px solid var(--steel);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle__icon{
  display:flex;
  flex-direction:column;
  gap:4px;
  width:16px;
}
.nav-toggle__line{
  display:block;
  width:16px;
  height:1px;
  background:var(--cyan);
  transition:background-color var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--orange);color:var(--orange);}
.nav-toggle[aria-expanded="true"] .nav-toggle__line{background:var(--orange);}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.6vw,22px);
  margin-left:auto;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(4px,1.4vw,20px);
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0 6px 13px;
  font-size:clamp(13px,1.1vw,15px);
  line-height:1.6;
  color:var(--gray);
  white-space:nowrap;
  transition:color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-link::before{
  content:"";
  position:absolute;
  left:1px;
  top:50%;
  width:5px;
  height:5px;
  margin-top:-2.5px;
  background:transparent;
  transition:background-color var(--dur) var(--ease);
}
.nav-link:hover{
  color:var(--paper);
  box-shadow:inset 0 -1px 0 var(--cyan);
}
.nav-link:hover::before{background:var(--cyan);}
.nav-link[aria-current="page"]{
  color:var(--paper);
  font-weight:700;
}
.nav-link[aria-current="page"]::before{background:var(--orange);}

.site-nav__cta{
  flex:0 0 auto;
  margin-left:clamp(4px,1.4vw,16px);
}

.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(22,69,107,.55);
  overflow:hidden;
  pointer-events:none;
}
.scroll-meter__fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:transform 90ms linear;
}

.quick-contact{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 16px;
  background:var(--orange);
  color:var(--deep);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  border:1px solid rgba(6,26,43,.25);
  box-shadow:0 12px 26px rgba(0,0,0,.45);
  opacity:0;
  visibility:hidden;
  transform:translateY(14px);
  pointer-events:none;
  transition:opacity var(--dur) var(--ease),
             transform var(--dur) var(--ease),
             visibility var(--dur) var(--ease),
             background-color var(--dur) var(--ease);
}
.quick-contact:hover{background:var(--orange-haze);}
.quick-contact__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--deep);
  box-shadow:0 0 0 3px rgba(6,26,43,.18);
}
.quick-contact[data-visible]{
  opacity:1;
  visibility:visible;
  transform:none;
  pointer-events:auto;
}

/* ================= 共享页脚 ================= */
.site-footer{
  background:var(--deep);
  color:var(--gray);
  border-top:1px solid var(--steel);
  padding:clamp(48px,7vw,88px) 0 0;
}
.footer__inner{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.45fr 1fr 1fr 1.25fr;
  gap:clamp(24px,4vw,56px);
  padding-bottom:clamp(32px,5vw,56px);
}
.footer__brand{min-width:0;}
.footer__mark{
  display:block;
  font-family:var(--font-display);
  font-weight:800;
  font-size:22px;
  letter-spacing:-.01em;
  color:var(--paper);
  line-height:1.3;
}
.footer__badge{
  display:inline-block;
  margin-top:12px;
  padding:3px 8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--cyan);
  border:1px solid rgba(47,227,208,.34);
  background:rgba(47,227,208,.07);
}
.footer__note{
  margin-top:16px;
  max-width:32ch;
  font-size:14px;
  line-height:1.75;
  color:var(--gray);
}
.footer__col{min-width:0;}
.footer__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--orange-haze);
}
.footer__links li + li{margin-top:10px;}
.footer__links a{
  display:inline-flex;
  align-items:baseline;
  flex-wrap:wrap;
  gap:8px;
  font-size:15px;
  line-height:1.7;
  color:var(--paper);
  opacity:.84;
  transition:color var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.footer__links a:hover{color:var(--cyan);opacity:1;}
.footer__path{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:rgba(169,186,203,.42);
  transition:color var(--dur) var(--ease);
}
.footer__links a:hover .footer__path{color:var(--cyan);}
.footer__lines li{
  font-size:14px;
  line-height:1.75;
  color:var(--gray);
}
.footer__lines li + li{margin-top:10px;}
.footer__lines .mono{
  font-size:13px;
  color:var(--paper);
}
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  padding:20px 0 28px;
  border-top:1px solid rgba(22,69,107,.75);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(169,186,203,.7);
}
.footer__meta{white-space:nowrap;}
.footer__policy{
  display:flex;
  flex-wrap:wrap;
  gap:12px 20px;
}
.footer__policy a{
  color:var(--gray);
  transition:color var(--dur) var(--ease);
}
.footer__policy a:hover{color:var(--cyan);}
.footer__icp{margin-left:auto;white-space:nowrap;}

/* ================= 响应式 ================= */
@media (max-width:1000px){
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:120;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin-left:0;
    padding:14px clamp(16px,4vw,32px) 22px;
    background:var(--hull);
    border-top:1px solid var(--steel);
    border-bottom:1px solid var(--steel);
    box-shadow:0 26px 44px rgba(0,0,0,.48);
  }
  .site-nav[data-open]{display:flex;}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__list li + li{border-top:1px solid rgba(22,69,107,.6);}
  .nav-link{
    display:block;
    padding:13px 0 13px 16px;
    font-size:16px;
  }
  .nav-link:hover{box-shadow:none;}
  .nav-link[aria-current="page"]{color:var(--orange);}
  .site-nav__cta{
    margin:16px 0 0;
    width:100%;
    padding:14px 18px;
  }
}

@media (max-width:960px){
  .footer__grid{grid-template-columns:1fr 1fr;}
  .footer__icp{margin-left:0;}
}

@media (max-width:860px){
  .grid--5-7,
  .grid--7-5,
  .grid--2,
  .grid--3{grid-template-columns:1fr;}
  .media--tilt,
  .media--tilt-alt{transform:none;}
}

@media (max-width:720px){
  body{font-size:16px;}
  .header__inner{min-height:56px;}
  .header__rail{display:none;}
  .header__bar{padding:8px 16px;gap:10px;}
  .brand__name{font-size:16.5px;}
  .brand__badge{font-size:10px;padding:2px 5px;}
  .site-footer{padding-bottom:78px;}
  .section{padding-block:clamp(44px,10vw,72px);}
}

@media (max-width:560px){
  .footer__grid{grid-template-columns:1fr;}
  .footer__legal{flex-direction:column;align-items:flex-start;gap:10px;}
}

@media (min-width:1001px){
  .quick-contact{display:none;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .btn--primary:hover{transform:none;}
  .quick-contact{transform:none;}
  .scroll-meter__fill{transition:none;}
}