/* ============================================================
   9博服务 · 共享站点样式 /assets/site.css
   深海蓝 + 霓虹青 + 暖橙的导航舱视觉体系
   ============================================================ */

:root{
  --deep-900:#061423;
  --deep-800:#0B2239;
  --deep-700:#12314F;
  --cyan-500:#22E0D6;
  --cyan-200:#7BF3EA;
  --orange-500:#FF8A3D;
  --clay-600:#C96A45;
  --moss-500:#6FBF8C;
  --violet-500:#A77BFF;
  --cream-100:#E9DFCF;
  --rock-400:#9AA8B4;
  --rock-200:#D3D9DE;

  --font-sans:system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;

  --rail-w:76px;
  --cmd-h:46px;

  --r-lg:28px;
  --r-md:20px;
  --r-sm:12px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --hairline:1px solid rgba(211,217,222,.15);
  --scroll-progress:0%;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5,h6{font-optical-sizing:auto}

@media (min-width:861px){
  body{padding-left:var(--rail-w);padding-top:var(--cmd-h)}
}

/* ---------- 基础排版 ---------- */
body{
  background:var(--deep-900);
  color:var(--cream-100);
  font-family:var(--font-sans);
  font-size:clamp(15.5px,.42vw + 14.4px,17px);
  line-height:1.78;
  font-weight:450;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

::selection{background:var(--cyan-500);color:var(--deep-900)}

h1,h2,h3,h4{font-weight:800;letter-spacing:.015em;line-height:1.14}
p{text-wrap:pretty}

.h-display{
  font-size:clamp(2.75rem,10.5vw,8.5rem);
  line-height:1.02;
  font-weight:800;
  letter-spacing:.015em;
}
.h-section{
  font-size:clamp(1.6rem,3.4vw,2.6rem);
  line-height:1.14;
  font-weight:800;
  letter-spacing:.015em;
}
.h-sub{
  font-size:clamp(1.02rem,1.5vw,1.3rem);
  font-weight:700;
  letter-spacing:.02em;
}
.lead{
  font-size:clamp(15px,1.15vw,17px);
  line-height:1.78;
  color:var(--rock-200);
  max-width:64ch;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.26em;
  color:var(--cyan-500);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:currentColor;
  opacity:.8;
}

.num-badge{
  display:inline-block;
  font-size:clamp(30px,4.6vw,56px);
  font-weight:800;
  line-height:1;
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  color:transparent;
  -webkit-text-stroke:1px rgba(34,224,214,.55);
}
.band-light .num-badge{-webkit-text-stroke:1px rgba(18,49,79,.45)}

/* ---------- 布局骨架 ---------- */
.wrap{
  width:100%;
  max-width:1260px;
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,56px);
}

.section{padding-block:clamp(46px,7vw,96px)}
.section--tight{padding-block:clamp(30px,4.5vw,60px)}

.band-light{
  background:var(--cream-100);
  color:var(--deep-900);
  border-bottom:1px solid var(--clay-600);
}
.band-light .lead{color:#33485C}
.band-light .eyebrow{color:var(--clay-600)}

.page-head{padding-top:clamp(30px,5vw,64px)}
.stack-sm > * + *{margin-top:12px}
.stack > * + *{margin-top:22px}
.stack-lg > * + *{margin-top:clamp(26px,3.4vw,44px)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding:.62em 1.18em;
  border-radius:999px;
  border:1px solid transparent;
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.3;
  white-space:nowrap;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn__arrow{transition:transform .18s var(--ease)}
.btn:hover .btn__arrow{transform:translateX(4px)}

.btn--cta{
  background:linear-gradient(100deg,var(--orange-500),#FFA35F);
  color:var(--deep-900);
}
.btn--cta:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(255,138,61,.3)}

.btn--ghost{
  background:transparent;
  color:var(--cyan-200);
  border-color:rgba(34,224,214,.45);
}
.btn--ghost:hover{background:rgba(34,224,214,.1);border-color:var(--cyan-500)}

.btn--light{background:var(--cream-100);color:var(--deep-900)}
.btn--light:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(6,20,35,.22)}

/* ---------- 状态 ---------- */
.status{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--moss-500);
  line-height:1;
}
.status__dot{
  width:7px;height:7px;
  border-radius:50%;
  background:currentColor;
  animation:statusPulse 2.8s var(--ease) infinite;
}
@keyframes statusPulse{
  0%{box-shadow:0 0 0 0 rgba(111,191,140,.55)}
  70%{box-shadow:0 0 0 7px rgba(111,191,140,0)}
  100%{box-shadow:0 0 0 0 rgba(111,191,140,0)}
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:200;
  padding:10px 18px;
  border-radius:10px;
  background:var(--cyan-500);
  color:var(--deep-900);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- 焦点 ---------- */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--cyan-500);
  outline-offset:3px;
  border-radius:6px;
}

/* ============================================================
   头部 · 品牌轨道 + 命令栏 + 索引面板
   ============================================================ */
.site-header{position:relative;z-index:80}

/* 左侧竖轨 */
.rail{
  position:fixed;
  inset-block:0;
  inset-inline-start:0;
  width:var(--rail-w);
  z-index:90;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding-block:20px 16px;
  background:
    linear-gradient(180deg,rgba(34,224,214,.1),transparent 42%),
    var(--deep-800);
  border-right:1px solid rgba(211,217,222,.14);
}
.rail::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(233,223,207,.55) 0 1px,transparent 1px 4px);
  opacity:.04;
}
.rail__brand{
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-size:14px;
  font-weight:800;
  letter-spacing:.38em;
  color:var(--cream-100);
  padding-block:6px 14px;
  border-bottom:1px solid rgba(34,224,214,.45);
  transition:color .18s var(--ease);
}
.rail__brand:hover{color:var(--cyan-200)}

.rail__dots{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:13px;
}
.rail__dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--rock-400);
  opacity:.4;
  transition:opacity .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.rail__dot.is-active{
  background:var(--orange-500);
  opacity:1;
  box-shadow:0 0 0 4px rgba(255,138,61,.18);
}

.rail__meta{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
}
.rail__page{
  writing-mode:vertical-rl;
  font-size:12px;
  font-weight:700;
  letter-spacing:.26em;
  color:var(--cyan-200);
}

/* 顶部命令栏 */
.cmdbar{
  position:fixed;
  top:0;
  inset-inline-start:var(--rail-w);
  inset-inline-end:0;
  height:var(--cmd-h);
  z-index:85;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-inline:clamp(14px,2vw,26px);
  background:rgba(11,34,57,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(211,217,222,.12);
}
.cmdbar::after{
  content:"";
  position:absolute;
  left:0;bottom:-1px;
  height:2px;
  width:var(--scroll-progress,0%);
  background:linear-gradient(90deg,var(--cyan-500),var(--violet-500) 55%,var(--orange-500));
  box-shadow:0 0 10px rgba(34,224,214,.5);
  transition:width .1s linear;
  pointer-events:none;
}
.cmdbar__left,
.cmdbar__right{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.cmdbar__brand{
  display:none;
  font-size:14px;
  font-weight:800;
  letter-spacing:.2em;
  color:var(--cream-100);
}

.cmdbar__toggle{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:5px 12px 5px 10px;
  border-radius:999px;
  border:1px solid rgba(211,217,222,.22);
  color:var(--cream-100);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.08em;
  transition:border-color .18s var(--ease),background .18s var(--ease),color .18s var(--ease);
}
.cmdbar__toggle:hover{border-color:var(--cyan-500);background:rgba(34,224,214,.09)}
.cmdbar__toggle[aria-expanded="true"]{
  border-color:var(--cyan-500);
  background:rgba(34,224,214,.14);
  color:var(--cyan-200);
}
.cmdbar__bars{
  display:inline-flex;
  flex-direction:column;
  gap:3px;
  width:14px;
}
.cmdbar__bars i{
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .22s var(--ease),opacity .18s var(--ease),width .18s var(--ease);
}
.cmdbar__bars i:nth-child(2){width:70%}
.cmdbar__toggle[aria-expanded="true"] .cmdbar__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.cmdbar__toggle[aria-expanded="true"] .cmdbar__bars i:nth-child(2){opacity:0}
.cmdbar__toggle[aria-expanded="true"] .cmdbar__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.cmdbar__index{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--rock-400);
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}
.cmdbar__index span{color:var(--cyan-200);font-weight:600}

/* 索引面板（桌面下拉 / 移动底部上浮） */
.nav{
  position:fixed;
  top:var(--cmd-h);
  inset-inline-start:var(--rail-w);
  inset-inline-end:0;
  z-index:84;
  display:grid;
  gap:18px;
  padding:clamp(18px,2.4vw,30px) clamp(18px,3vw,40px) clamp(22px,3vw,34px);
  background:linear-gradient(180deg,rgba(18,49,79,.98),rgba(6,20,35,.98));
  border-bottom:1px solid rgba(34,224,214,.26);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transform:translateY(-10px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
}
.nav[data-open]{
  opacity:1;
  visibility:visible;
  pointer-events:auto;
  transform:none;
}
.nav__list{
  display:flex;
  flex-wrap:wrap;
  gap:9px 10px;
  max-width:1080px;
}
.nav__link{
  display:inline-flex;
  align-items:baseline;
  gap:9px;
  padding:10px 16px;
  border-radius:999px;
  border:1px solid rgba(211,217,222,.16);
  color:var(--cream-100);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.03em;
  transition:border-color .18s var(--ease),background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.nav__link:hover{
  border-color:var(--cyan-500);
  background:rgba(34,224,214,.09);
  transform:translateY(-1px);
}
.nav__num{
  font-size:11px;
  font-weight:800;
  letter-spacing:.12em;
  color:var(--cyan-500);
  font-variant-numeric:tabular-nums;
}
.nav__link[aria-current="page"]{
  background:var(--cyan-500);
  border-color:var(--cyan-500);
  color:var(--deep-900);
}
.nav__link[aria-current="page"] .nav__num{color:rgba(6,20,35,.62)}
.nav__note{
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--rock-400);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  padding-top:clamp(38px,5vw,66px);
  background:linear-gradient(180deg,var(--deep-900),#040F19);
  border-top:1px solid rgba(211,217,222,.12);
  z-index:10;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan-500),var(--orange-500) 55%,transparent);
  opacity:.75;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.2fr 1fr;
  gap:clamp(24px,3.4vw,52px);
}
.footer__logo{
  font-size:clamp(19px,2.2vw,24px);
  font-weight:800;
  letter-spacing:.14em;
  color:var(--cream-100);
}
.footer__tag{
  margin-top:10px;
  margin-bottom:16px;
  max-width:22ch;
  font-size:13.5px;
  line-height:1.72;
  color:var(--rock-400);
}
.footer__head{
  margin-bottom:14px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.28em;
  color:var(--cyan-500);
}
.footer__list li{
  color:var(--rock-200);
  font-size:14px;
  line-height:1.7;
  letter-spacing:.02em;
}
.footer__list li + li{margin-top:9px}
.footer__list a{
  color:var(--cream-100);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer__list a:hover{color:var(--cyan-200);border-bottom-color:var(--cyan-500)}
.footer__note{
  margin-top:14px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--rock-400);
}
.footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:clamp(28px,4vw,50px);
  padding-block:18px;
  border-top:1px solid rgba(211,217,222,.1);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--rock-400);
  font-variant-numeric:tabular-nums;
}

/* ============================================================
   通用内容组件
   ============================================================ */
.card{
  background:var(--deep-700);
  border:1px solid rgba(211,217,222,.14);
  border-radius:var(--r-md);
  padding:clamp(18px,2.2vw,26px);
  transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.card:hover{border-color:var(--cyan-500);transform:translateY(-2px)}
.card__title{font-size:1.05rem;font-weight:700;letter-spacing:.02em}
.card__text{margin-top:8px;font-size:14px;line-height:1.75;color:var(--rock-400)}
.card--file{
  border-radius:4px;
  background:rgba(18,49,79,.72);
}
.band-light .card{
  background:#fff;
  border-color:rgba(6,20,35,.14);
  color:var(--deep-900);
}
.band-light .card__text{color:#41586B}

.tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:999px;
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1.6;
  white-space:nowrap;
}
.tag--cyan{background:rgba(34,224,214,.14);color:var(--cyan-200);border:1px solid rgba(34,224,214,.42)}
.tag--violet{background:rgba(167,123,255,.18);color:#CDB4FF;border:1px solid rgba(167,123,255,.42)}
.tag--orange{background:rgba(255,138,61,.16);color:#FFB485;border:1px solid rgba(255,138,61,.44)}
.band-light .tag--cyan{background:rgba(6,20,35,.07);color:#0F6E6B;border-color:rgba(6,20,35,.2)}
.band-light .tag--violet{background:rgba(94,52,168,.1);color:#5A3BA8;border-color:rgba(94,52,168,.28)}
.band-light .tag--orange{background:rgba(201,106,69,.14);color:#8A3F1F;border-color:rgba(201,106,69,.36)}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:.35em;
  padding-bottom:2px;
  font-size:14px;
  font-weight:600;
  color:var(--cyan-200);
  border-bottom:1px solid rgba(34,224,214,.35);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.link-arrow::after{content:"→";transition:transform .18s var(--ease)}
.link-arrow:hover{color:var(--cyan-500);border-bottom-color:var(--cyan-500)}
.link-arrow:hover::after{transform:translateX(4px)}

/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--rock-400);
}
.breadcrumb a{color:var(--rock-200);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--cyan-200)}
.breadcrumb__sep{color:rgba(211,217,222,.4)}
.breadcrumb [aria-current="page"]{color:var(--cyan-200);font-weight:600}

/* 图片容器基础规则 */
.figure{margin:0}
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  border-radius:var(--r-md);
  border:1px solid rgba(211,217,222,.12);
  background:linear-gradient(140deg,var(--deep-700),var(--deep-800));
  aspect-ratio:16/10;
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media > img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.media:hover > img{transform:scale(1.03)}
.media--glow::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 72% 24%,rgba(34,224,214,.22),transparent 55%),
    linear-gradient(180deg,transparent 52%,rgba(6,20,35,.72));
}
.media__fallback{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:18px;
  text-align:center;
  font-size:12px;
  letter-spacing:.28em;
  line-height:1.9;
  color:rgba(233,223,207,.45);
}
.figure__cap{
  margin-top:10px;
  padding-top:8px;
  border-top:1px solid var(--clay-600);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--rock-400);
}

/* 显现动画 */
[data-reveal].reveal-pending{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
[data-reveal].reveal-pending.is-in{
  opacity:1;
  transform:none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1024px){
  .footer__grid{grid-template-columns:1fr 1fr}
}

@media (max-width:860px){
  body{
    padding-top:56px;
    padding-bottom:16px;
  }
  .rail{display:none}

  .cmdbar{
    inset-inline-start:0;
    height:56px;
    padding-inline:16px;
    gap:10px;
  }
  .cmdbar__index{display:none}
  .cmdbar__brand{display:inline-block;order:-1}
  .cmdbar__left{flex:1;gap:10px}
  .cmdbar__right{gap:8px}
  .cmdbar__right .status{display:none}
  .cmdbar__toggle{padding:5px 11px 5px 9px}
  .btn--cta{font-size:12.5px;padding:.58em 1em}

  .nav{
    inset-inline-start:0;
    inset-inline-end:0;
    top:auto;
    bottom:0;
    max-height:min(76vh,540px);
    overflow-y:auto;
    padding:20px 18px calc(24px + env(safe-area-inset-bottom));
    border-radius:22px 22px 0 0;
    border-top:1px solid rgba(34,224,214,.26);
    border-bottom:0;
    transform:translateY(16px);
    box-shadow:0 -26px 64px rgba(0,0,0,.55);
  }
  .nav__list{
    flex-direction:column;
    flex-wrap:nowrap;
    gap:8px;
  }
  .nav__link{
    width:100%;
    justify-content:flex-start;
    padding:13px 16px;
    border-radius:14px;
    font-size:15px;
  }
  .nav__note{padding-inline:4px}

  .footer__grid{grid-template-columns:1fr 1fr;gap:28px 24px}
  .footer__brand{grid-column:1 / -1}
}

@media (max-width:560px){
  .footer__grid{grid-template-columns:1fr}
  .footer__base{font-size:11.5px;letter-spacing:.06em}
  .cmdbar__toggle-text{display:none}
  .btn--cta{font-size:12px;padding:.6em .95em}
  .media{border-radius:var(--r-sm)}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal].reveal-pending{opacity:1;transform:none}
  .media:hover > img{transform:none}
}