/* ============================================================
   乐鱼中文站 · 共享样式 /assets/site.css
   框架导航 + 深海战术室色彩体系
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --c-ink:#061420;
  --c-tactic:#0B2030;
  --c-grid:#16323F;
  --c-stone:#2C3A40;
  --c-clay:#3A3733;
  --c-mist:#E8F1F2;
  --c-cool:#94A9B3;
  --c-lime:#B8F24A;
  --c-lime-deep:#7FBF1F;
  --c-coral:#FF7A4D;
  --c-coral-soft:#FF9571;
  --c-haze:#5C7480;
  --c-amber:#F2B23E;
  --c-sand:#D9D2C7;
  --c-clay-line:#4B4640;

  --rail-w:88px;
  --bar-h:48px;
  --shell:1320px;
  --gap:22px;

  --f-display:"Barlow Condensed","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --f-body:"Inter","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --f-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --t-xs:12px;
  --t-sm:14px;
  --t-base:17px;
  --t-md:22px;
  --t-lg:30px;
  --t-xl:44px;
  --t-2xl:64px;
  --t-3xl:88px;

  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:160ms;
}

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

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

body,
h1,h2,h3,h4,h5,
p,ul,ol,figure,blockquote,hr{margin:0;}

ul,ol{padding:0;list-style:none;}

img,svg,video{display:block;max-width:100%;height:auto;}

button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}

a{color:inherit;text-decoration:none;}

[hidden]{display:none !important;}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--c-ink);
  background-image:
    repeating-linear-gradient(90deg, rgba(22,50,63,.50) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(0deg, rgba(22,50,63,.26) 0 1px, transparent 1px 120px),
    radial-gradient(120% 90% at 6% -14%, rgba(184,242,74,.09), transparent 58%),
    radial-gradient(100% 80% at 104% -8%, rgba(255,122,77,.07), transparent 52%);
  color:var(--c-mist);
  font-family:var(--f-body);
  font-size:var(--t-base);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  font-family:var(--f-display);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.01em;
  color:var(--c-mist);
}

h1{font-size:clamp(36px,5.6vw,var(--t-2xl));}
h2{font-size:clamp(26px,3.2vw,var(--t-lg));}
h3{font-size:var(--t-md);}
h4{font-size:var(--t-base);letter-spacing:.02em;}

p{max-width:38em;}
p + p{margin-top:.85em;}

strong{font-weight:600;color:var(--c-mist);}

small{font-size:var(--t-xs);}

::selection{background:var(--c-lime);color:var(--c-ink);}

:focus-visible{
  outline:2px solid var(--c-lime);
  outline-offset:3px;
}

#main-content{
  display:block;
  min-height:60vh;
  scroll-margin-top:calc(var(--bar-h) + 12px);
}
#main-content:focus{outline:none;}

.nav-open{overflow:hidden;}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  display:inline-block;
  padding:10px 18px;
  background:var(--c-lime);
  color:var(--c-ink);
  font-size:var(--t-sm);
  font-weight:600;
  letter-spacing:.1em;
  border:1px solid var(--c-lime);
  transform:translateY(-180%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);}

/* ---------- 5. 页头：框架式导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
}

/* 5.1 左侧竖向骨架栏 */
.rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail-w);
  z-index:65;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:14px 0 16px;
  background:linear-gradient(180deg,#081C2A 0%,#061420 62%,#04101A 100%);
  border-right:1px solid var(--c-grid);
}

.rail-nav{
  flex:1 1 auto;
  min-height:0;
  overflow-y:auto;
  overflow-x:hidden;
  scrollbar-width:thin;
  scrollbar-color:var(--c-stone) transparent;
}

.rail-list{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  padding:4px 0 8px;
}
.rail-list > li{
  width:100%;
  display:flex;
  justify-content:center;
}

.rail-link{
  position:relative;
  display:block;
  min-height:44px;
  padding:14px 10px;
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:13px;
  letter-spacing:.16em;
  color:var(--c-cool);
  border:1px solid transparent;
  transition:
    color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.rail-num{
  display:inline-block;
  margin-bottom:8px;
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--c-haze);
  text-combine-upright:all;
}

.rail-name{display:inline-block;}

.rail-link:hover{
  color:var(--c-mist);
  background:rgba(184,242,74,.07);
  border-color:var(--c-grid);
}
.rail-link:hover .rail-num{color:var(--c-lime);}

.rail-link[aria-current="page"]{
  color:var(--c-lime);
  background:rgba(184,242,74,.11);
  box-shadow:inset 2px 0 0 var(--c-lime);
}
.rail-link[aria-current="page"] .rail-num{color:var(--c-lime);}

.rail-meta{
  margin:0 auto;
  padding:0 4px;
  writing-mode:vertical-rl;
  text-align:center;
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--c-haze);
  max-width:none;
}

/* 5.2 顶部状态条 */
.topbar{
  display:flex;
  align-items:center;
  gap:14px;
  height:var(--bar-h);
  padding:0 18px;
  background:rgba(6,20,32,.92);
  border-bottom:1px solid var(--c-grid);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}

.topbar-brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--f-display);
  font-size:15px;
  font-weight:800;
  letter-spacing:.14em;
  color:var(--c-mist);
  white-space:nowrap;
  flex:none;
}

.brand-mark{
  width:12px;
  height:12px;
  flex:none;
  background:var(--c-lime);
  box-shadow:2px 2px 0 var(--c-coral);
}

.brand-name{letter-spacing:.16em;}

.topbar-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  max-width:none;
  padding-left:14px;
  border-left:1px solid var(--c-grid);
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--c-cool);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.status-dot{
  width:6px;
  height:6px;
  flex:none;
  background:var(--c-lime);
  box-shadow:0 0 0 3px rgba(184,242,74,.15);
  animation:pos-pulse 2.6s var(--ease) infinite;
}

@keyframes pos-pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(184,242,74,.15);}
  50%{box-shadow:0 0 0 6px rgba(184,242,74,.04);}
}

.topbar-quick{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}

.quick-link{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  padding:0 11px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-cool);
  border:1px solid var(--c-grid);
  background:rgba(11,32,48,.6);
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.quick-link:hover{
  color:var(--c-lime);
  border-color:var(--c-lime-deep);
  background:rgba(184,242,74,.12);
}

/* 5.3 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  min-width:44px;
  min-height:44px;
  margin-left:auto;
  padding:0 10px;
  border:1px solid var(--c-grid);
  color:var(--c-mist);
  font-size:12px;
  letter-spacing:.16em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--c-lime-deep);color:var(--c-lime);}

.nav-toggle-icon{
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  width:16px;
  height:11px;
  flex:none;
}

.nav-toggle-bar{
  display:block;
  width:100%;
  height:1.5px;
  background:var(--c-lime);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(4.75px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child{transform:translateY(-4.75px) rotate(-45deg);}

.nav-toggle-label{white-space:nowrap;}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,104px);
  border-top:1px solid var(--c-grid);
  background:linear-gradient(180deg,rgba(11,32,48,.42) 0%,rgba(6,20,32,.96) 68%,#04101A 100%);
  overflow:hidden;
}

.footer-band{
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.55;
  background-image:
    repeating-linear-gradient(90deg, rgba(22,50,63,.75) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, rgba(22,50,63,.45) 0 1px, transparent 1px 48px);
  -webkit-mask-image:linear-gradient(90deg,#000 0%,rgba(0,0,0,.25) 34%,transparent 52%);
  mask-image:linear-gradient(90deg,#000 0%,rgba(0,0,0,.25) 34%,transparent 52%);
}

.footer-inner{
  position:relative;
  z-index:1;
  padding-top:clamp(40px,5vw,72px);
  padding-bottom:26px;
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1fr) minmax(0,2.1fr);
  gap:clamp(24px,4vw,64px);
  align-items:start;
  padding-bottom:clamp(26px,3vw,40px);
  border-bottom:1px solid var(--c-grid);
}

.footer-brand{
  display:flex;
  flex-direction:column;
  gap:14px;
}

.footer-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--f-display);
  font-size:22px;
  font-weight:800;
  letter-spacing:.14em;
  color:var(--c-mist);
}
.footer-logo::before{
  content:"";
  width:10px;
  height:10px;
  flex:none;
  background:var(--c-lime);
  box-shadow:2px 2px 0 var(--c-coral);
}
.footer-logo:hover{color:var(--c-lime);}

.footer-note{
  font-size:14px;
  line-height:1.9;
  color:var(--c-cool);
  max-width:30em;
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(16px,2.4vw,36px);
}

.footer-col{min-width:0;}

.footer-col-title{
  margin-bottom:12px;
  padding-bottom:8px;
  border-bottom:1px solid var(--c-grid);
  font-family:var(--f-body);
  font-size:11px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--c-haze);
  text-transform:uppercase;
}

.footer-links{
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:14px;
  line-height:1.6;
}

.footer-links a{
  display:inline-block;
  padding:3px 0;
  color:var(--c-cool);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-links a:hover{
  color:var(--c-lime);
  border-bottom-color:var(--c-lime-deep);
}
.footer-links a[aria-current="page"]{color:var(--c-lime);}

.footer-col--contact .footer-links--plain{
  font-family:var(--f-mono);
  font-size:12px;
  letter-spacing:.03em;
}

.footer-links--plain li{
  color:var(--c-cool);
  overflow-wrap:anywhere;
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 24px;
  padding-top:22px;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--c-haze);
}
.footer-legal p{max-width:none;}

.footer-icp{color:var(--c-cool);}
.footer-copy{margin-left:auto;color:var(--c-cool);}
.footer-tip{color:var(--c-haze);}

/* ---------- 7. 通用容器与组件 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,56px);
}

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

.col-4{grid-column:span 4;}
.col-5{grid-column:span 5;}
.col-7{grid-column:span 7;}
.col-8{grid-column:span 8;}
.col-12{grid-column:span 12;}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:14px;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--c-haze);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"／";color:var(--c-stone);}
.breadcrumb a{color:var(--c-cool);transition:color var(--dur) var(--ease);}
.breadcrumb a:hover{color:var(--c-lime);}
.breadcrumb [aria-current="page"]{color:var(--c-mist);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:44px;
  padding:0 20px;
  border:1px solid var(--c-grid);
  background:transparent;
  color:var(--c-mist);
  font-family:var(--f-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.1em;
  text-align:center;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.btn:hover{
  color:var(--c-lime);
  border-color:var(--c-lime-deep);
  background:rgba(184,242,74,.09);
}

.btn--solid{
  background:var(--c-lime);
  border-color:var(--c-lime);
  color:var(--c-ink);
}
.btn--solid:hover{
  background:var(--c-lime-deep);
  border-color:var(--c-lime-deep);
  color:var(--c-ink);
}

.btn--line{
  border-color:var(--c-coral);
  color:var(--c-coral);
}
.btn--line:hover{
  background:rgba(255,122,77,.12);
  border-color:var(--c-coral);
  color:var(--c-coral-soft);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-cool);
}
.eyebrow::before{
  content:"";
  width:20px;
  height:1px;
  flex:none;
  background:var(--c-lime);
}

.data-num{
  font-family:var(--f-mono);
  font-weight:600;
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  color:var(--c-lime);
}

.rule{
  height:1px;
  border:0;
  background:var(--c-grid);
  margin-block:clamp(26px,4vw,46px);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--c-grid);
  background:rgba(22,50,63,.45);
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--c-cool);
  white-space:nowrap;
}
.tag--lime{
  color:var(--c-lime);
  border-color:rgba(184,242,74,.42);
  background:rgba(184,242,74,.09);
}
.tag--coral{
  color:var(--c-coral);
  border-color:rgba(255,122,77,.42);
  background:rgba(255,122,77,.09);
}
.tag--clay{
  color:var(--c-sand);
  border-color:var(--c-clay-line);
  background:var(--c-clay);
}

.panel{
  position:relative;
  background:var(--c-tactic);
  border:1px solid var(--c-grid);
}
.panel--clay{
  background:var(--c-clay);
  border-color:var(--c-clay-line);
}

.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:11px 16px;
  border-bottom:1px solid var(--c-grid);
  background:rgba(22,50,63,.55);
}
.panel--clay .panel__head{
  border-bottom-color:var(--c-clay-line);
  background:rgba(0,0,0,.16);
}

.panel__title{
  font-family:var(--f-body);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--c-cool);
}

.panel__body{padding:16px;}

/* 图片容器基础规则（页面阶段放置占位或图片） */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--c-grid);
  background:var(--c-tactic);
  aspect-ratio:16 / 10;
  isolation:isolate;
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background-image:
    repeating-linear-gradient(135deg, rgba(22,50,63,.75) 0 1px, transparent 1px 12px),
    radial-gradient(120% 90% at 20% 0%, rgba(184,242,74,.08), transparent 60%);
}
.media-frame img,
.media-frame video,
.media-frame picture{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.85) contrast(1.05) brightness(.95);
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}

.media-frame__caption{
  position:absolute;
  z-index:2;
  inset:auto 0 0 0;
  padding:10px 14px;
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--c-cool);
  background:linear-gradient(180deg,transparent,rgba(6,20,32,.92));
}

/* ---------- 8. 筛选协议 ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}

.filter-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 16px;
  border:1px solid var(--c-grid);
  background:rgba(11,32,48,.65);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--c-cool);
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.filter-btn:hover{
  color:var(--c-mist);
  border-color:var(--c-lime-deep);
}
.filter-btn[aria-pressed="true"]{
  color:var(--c-ink);
  background:var(--c-lime);
  border-color:var(--c-lime);
  font-weight:600;
}

.filter-item[hidden]{display:none;}

.filter-item[data-enter]{animation:lift-in 200ms var(--ease) both;}

@keyframes lift-in{
  from{opacity:0;transform:translateY(8px);}
  to{opacity:1;transform:translateY(0);}
}

.filter-empty{
  padding:32px 16px;
  text-align:center;
  font-size:14px;
  color:var(--c-cool);
  border:1px dashed var(--c-grid);
  max-width:none;
}

/* ---------- 9. 响应式：抽屉导航 / 页脚折叠 ---------- */
@media (min-width:1080px){
  body{padding-left:var(--rail-w);}
}

@media (max-width:1079px){
  .nav-toggle{display:inline-flex;}

  .rail{
    top:var(--bar-h);
    left:0;
    bottom:0;
    right:auto;
    width:min(84vw,340px);
    padding:18px 18px 26px;
    gap:10px;
    transform:translateX(-104%);
    visibility:hidden;
    transition:transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
    box-shadow:none;
    overflow-y:auto;
  }
  .rail[data-open]{
    transform:translateX(0);
    visibility:visible;
    box-shadow:32px 0 80px rgba(0,0,0,.6);
  }

  .rail-nav{overflow:visible;}

  .rail-list{align-items:stretch;gap:0;}
  .rail-list > li{display:block;}

  .rail-link{
    writing-mode:horizontal-tb;
    display:flex;
    align-items:center;
    gap:12px;
    width:100%;
    padding:13px 10px;
    font-size:15px;
    letter-spacing:.12em;
    border:1px solid transparent;
    border-bottom-color:rgba(22,50,63,.7);
  }

  .rail-num{
    margin:0;
    width:26px;
    flex:none;
    font-size:11px;
    color:var(--c-lime-deep);
    text-combine-upright:none;
  }

  .rail-name{margin:0;}

  .rail-link[aria-current="page"]{
    box-shadow:inset 2px 0 0 var(--c-lime);
    border-color:var(--c-grid);
  }

  .rail-meta{
    writing-mode:horizontal-tb;
    text-align:left;
    margin:8px 0 0;
    padding-left:10px;
  }
}

@media (max-width:900px){
  .topbar-quick{display:none;}

  .footer-top{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(4,minmax(0,1fr));}

  .col-4,
  .col-5,
  .col-7,
  .col-8{grid-column:span 12;}
}

@media (max-width:760px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 18px;}
  .footer-copy{margin-left:0;}
}

@media (max-width:620px){
  .topbar{gap:10px;padding:0 12px;}
  .topbar-status{font-size:10px;letter-spacing:.06em;padding-left:10px;}
  .brand-name{letter-spacing:.1em;}
  .topbar-brand{font-size:14px;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:6px;}
  .grid{--gap:16px;}
}

/* ---------- 10. 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;
  }

  .status-dot{animation:none;box-shadow:0 0 0 3px rgba(184,242,74,.15);}
  .filter-item[data-enter]{animation:none;}
  .skip-link{transition:none;}
}