/* ============================================================
   英亚平台 · 共享站点样式 /assets/site.css
   深渊墨蓝 + 蓝图网格 + 信号橙/电光青双锚点
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --abyss-950:#050D1A;
  --abyss-900:#0A1A2F;
  --blueprint-800:#113250;
  --paper-100:#F2F6FA;
  --ink-950:#02060C;
  --orange:#FF6B2C;
  --cyan:#25D9D2;
  --amber-200:#FFC29E;
  --cyan-100:#A6F5F1;
  --slate-400:#8CA3B8;

  --surface:var(--abyss-950);
  --surface-2:var(--abyss-900);
  --line:rgba(140,163,184,.22);
  --line-strong:rgba(140,163,184,.40);
  --text:var(--paper-100);
  --text-soft:var(--slate-400);

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

  --step:8px;
  --wrap:1240px;
  --radius-pill:999px;
  --radius-soft:18px;
  --radius-block:26px;

  --dur:180ms;
  --dur-slow:340ms;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:110px;
}

body{
  margin:0;
  background:var(--surface);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(140,163,184,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(140,163,184,.055) 1px,transparent 1px);
  background-size:80px 80px;
  -webkit-mask-image:radial-gradient(ellipse 120% 90% at 50% 0%,#000 15%,transparent 78%);
  mask-image:radial-gradient(ellipse 120% 90% at 50% 0%,#000 15%,transparent 78%);
}

h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
input{font:inherit;color:inherit;}
main{display:block;}
#main-content:focus{outline:none;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

::selection{background:var(--orange);color:var(--ink-950);}

/* ---------- 3. 排版工具 ---------- */
.mono{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-soft);
}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--orange);
}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

.skip-link{
  position:fixed;
  left:16px;
  top:-90px;
  z-index:200;
  display:inline-block;
  padding:10px 20px;
  border-radius:var(--radius-pill);
  background:var(--paper-100);
  color:var(--ink-950);
  font-weight:700;
  font-size:14px;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:16px;}

/* ---------- 4. 容器与网格 ---------- */
.wrap{
  position:relative;
  width:min(100% - 32px,var(--wrap));
  margin-inline:auto;
}

.section{
  position:relative;
  padding:clamp(56px,7vw,96px) 0;
}

.band{
  background:var(--surface-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}

.section-head{
  display:grid;
  gap:12px;
  max-width:64ch;
}

.section-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(26px,3.4vw,42px);
  line-height:1.2;
  letter-spacing:-.01em;
}

.section-lede{
  color:var(--text-soft);
  font-size:16px;
  max-width:70ch;
}

.grid{display:grid;gap:24px;}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}

@media (max-width:900px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
}
@media (max-width:600px){
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid{gap:16px;}
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-body);
  font-weight:600;
  font-size:15px;
  line-height:1.2;
  letter-spacing:.02em;
  text-align:center;
  cursor:pointer;
  transition:background var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(0);}

.btn--primary{
  background:var(--orange);
  color:var(--ink-950);
  border-color:var(--orange);
}
.btn--primary:hover{background:var(--amber-200);border-color:var(--amber-200);}

.btn--ghost{
  background:transparent;
  color:var(--text);
  border-color:var(--line-strong);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}

.btn--sm{padding:8px 16px;font-size:13px;}

/* ---------- 6. 基础元件 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-soft);
}
.chip--beta{
  color:var(--orange);
  border-color:rgba(255,107,44,.5);
  background:rgba(255,107,44,.1);
}
.chip--ctrl{
  color:var(--cyan);
  border-color:rgba(37,217,210,.5);
  background:rgba(37,217,210,.1);
}

.panel{
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--radius-soft);
  background:var(--surface-2);
}
.panel--paper{
  background:var(--paper-100);
  color:var(--ink-950);
  border-color:transparent;
}
.panel--paper .mono,
.panel--paper .section-lede{color:rgba(2,6,12,.62);}

.crumb{padding-top:20px;}
.crumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--text-soft);
}
.crumb-list li{display:inline-flex;align-items:center;}
.crumb-list li:not(:last-child)::after{
  content:"/";
  margin-left:8px;
  color:var(--blueprint-800);
}
.crumb-list a:hover{color:var(--cyan);}

/* 可复用图片容器（共享头部与页脚不放图片，仅供页面阶段使用） */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius-soft);
  background:linear-gradient(155deg,var(--blueprint-800),var(--abyss-900) 70%);
}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(242,246,250,.07) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(242,246,250,.07) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.55;
}
.media-frame figcaption{
  position:absolute;
  left:14px;
  bottom:12px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan-100);
}

/* ---------- 7. 头部：悬浮胶囊浮岛 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  padding-top:14px;
  pointer-events:none;
}

.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:90;
  pointer-events:none;
}
.scroll-progress-bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--orange),var(--cyan));
  transition:width 90ms linear;
}

.header-capsule{
  position:relative;
  pointer-events:auto;
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 12px 10px 18px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(10,26,47,.80);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  backdrop-filter:blur(16px) saturate(130%);
  box-shadow:0 20px 44px -30px rgba(0,0,0,.95);
  transition:padding var(--dur) var(--ease),
             background var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.site-header[data-scrolled="true"] .header-capsule{
  padding-top:6px;
  padding-bottom:6px;
  background:rgba(10,26,47,.94);
  border-color:var(--line-strong);
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  position:relative;
  width:26px;
  height:26px;
  flex:0 0 auto;
  border-radius:8px;
  background:linear-gradient(140deg,var(--orange),var(--cyan));
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:3px;
  background:var(--surface);
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.1;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:16px;
  letter-spacing:.02em;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--text-soft);
}
.brand--footer .brand-name{font-size:18px;}

/* 导航 */
.site-nav{
  flex:1 1 auto;
  display:flex;
  justify-content:center;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  flex-wrap:nowrap;
}
.nav-link{
  display:inline-block;
  padding:9px 14px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:14px;
  font-weight:500;
  white-space:nowrap;
  color:var(--text-soft);
  transition:color var(--dur) var(--ease),
             background var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.nav-link:hover{
  color:var(--text);
  background:rgba(242,246,250,.06);
}
.nav-link[aria-current="page"]{
  color:var(--text);
  border-color:var(--orange);
  background:rgba(255,107,44,.12);
}

/* 头部动作区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.ver-switch{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 12px;
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-pill);
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.ver-switch:hover{
  border-style:solid;
  border-color:var(--cyan);
  background:rgba(37,217,210,.08);
}
.ver-dot{
  width:8px;
  height:8px;
  flex:0 0 auto;
  border-radius:50%;
}
.ver-dot--beta{background:var(--orange);box-shadow:0 0 0 3px rgba(255,107,44,.16);}
.ver-dot--ctrl{background:var(--cyan);box-shadow:0 0 0 3px rgba(37,217,210,.16);}
.ver-switch-text{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--text-soft);
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:8px 14px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  transition:border-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--paper-100);
  transition:background var(--dur) var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--paper-100);
  transition:transform var(--dur) var(--ease);
}
.nav-toggle-bars::before{top:-5px;}
.nav-toggle-bars::after{top:5px;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-5px) rotate(-45deg);}
.nav-toggle-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
}

/* 平板与手机：浮岛展开面板 */
@media (max-width:960px){
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    justify-content:flex-start;
    padding:14px;
    border:1px solid var(--line-strong);
    border-radius:var(--radius-block);
    background:rgba(5,13,26,.98);
    box-shadow:0 32px 64px -34px #000;
  }
  .site-nav[data-open="true"]{display:flex;}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    width:100%;
  }
  .nav-link{
    padding:12px 16px;
    border-radius:14px;
    font-size:16px;
  }

  .header-actions{gap:8px;}
}

@media (max-width:720px){
  .ver-switch-text{display:none;}
  .ver-switch{padding:7px 9px;}
}

@media (max-width:560px){
  .header-capsule{padding:8px 10px 8px 14px;gap:10px;}
  .ver-switch{display:none;}
  .header-actions .btn--sm{padding:8px 14px;font-size:12px;}
  .brand-name{font-size:15px;}
  .brand-sub{font-size:8px;}
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:0;
  background:var(--surface-2);
  border-top:1px solid var(--line);
}

/* 订阅条带 */
.sub-band{
  position:relative;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.sub-band::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--orange),var(--cyan));
}
.sub-band-inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,440px);
  gap:32px;
  align-items:end;
  padding:40px 0;
}
.sub-kicker{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:10px;
}
.sub-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.25;
  letter-spacing:-.01em;
}
.sub-note{
  margin-top:8px;
  max-width:48ch;
  font-size:14px;
  color:var(--text-soft);
}

.sub-form{display:block;}
.sub-row{display:flex;gap:8px;}
.sub-input{
  flex:1 1 auto;
  min-width:0;
  padding:12px 18px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  background:rgba(242,246,250,.06);
  color:var(--text);
  font-size:14px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.sub-input::placeholder{color:rgba(140,163,184,.72);}
.sub-input:focus-visible{
  outline:none;
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(37,217,210,.2);
}

.sub-modes{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:10px;
}
.sub-mode{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:6px 13px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--text-soft);
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             background var(--dur) var(--ease);
}
.sub-mode:hover{border-color:var(--line-strong);color:var(--text);}
.sub-mode input{
  position:absolute;
  width:1px;height:1px;
  opacity:0;
  pointer-events:none;
}
.sub-mode[data-checked="true"]{
  border-color:var(--cyan);
  color:var(--cyan);
  background:rgba(37,217,210,.1);
}
.sub-mode:focus-within{outline:2px solid var(--cyan);outline-offset:3px;}

.sub-status{
  min-height:18px;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--cyan);
}
.sub-status[data-state="error"]{color:var(--orange);}

/* 页脚主网格 */
.footer-main{
  display:grid;
  grid-template-columns:1.4fr .9fr 1fr 1.6fr;
  gap:32px;
  padding:56px 0 40px;
}
.footer-tagline{
  margin-top:14px;
  max-width:28ch;
  font-size:14px;
  color:var(--text-soft);
}
.footer-col-label{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--blueprint-800);
  color:rgba(140,163,184,.85);
}
.footer-list{
  display:grid;
  gap:9px;
  font-size:14px;
}
.footer-list a{
  color:var(--text-soft);
  transition:color var(--dur) var(--ease);
}
.footer-list a:hover{color:var(--text);}

.contact-list{display:grid;gap:16px;}
.contact-key{
  display:block;
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:rgba(140,163,184,.85);
}
.contact-val{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:3px;
  font-size:14px;
  color:var(--text);
  word-break:break-word;
}
.copy-btn{
  padding:4px 10px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--text-soft);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan);}
.copy-btn[data-copied="true"]{border-color:var(--cyan);color:var(--cyan);}
.contact-note{
  margin-top:16px;
  font-size:12px;
  line-height:1.7;
  color:var(--text-soft);
}

/* 页脚底条 */
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 0 30px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--text-soft);
}
.footer-copy,
.footer-icp{margin:0;}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
}
.footer-legal a{
  color:var(--text-soft);
  transition:color var(--dur) var(--ease);
}
.footer-legal a:hover{color:var(--cyan);}

@media (max-width:1024px){
  .sub-band-inner{grid-template-columns:1fr;align-items:start;}
  .footer-main{grid-template-columns:1fr 1fr;gap:36px 24px;}
}

@media (max-width:640px){
  .footer-main{grid-template-columns:1fr;padding:40px 0 32px;}
  .sub-band-inner{padding:32px 0;}
  .sub-row{flex-wrap:wrap;}
  .sub-row .btn{width:100%;}
  .footer-base{justify-content:flex-start;gap:10px;}
  .footer-legal{gap:14px;}
}

/* ---------- 9. 可访问性与动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover{transform:none;}
}