/* ============================================================
   乐鱼官网 · 共享样式 /assets/site.css
   深水蓝底 · 荧光青选中 · 暖橙交互 · 1px 精密网格 · 锐利直角
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
img,svg,video{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--c-cyan);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-orange-soft)}
[hidden]{display:none !important}
::selection{background:var(--c-cyan);color:var(--c-deep)}

/* ---------- 2. 变量 ---------- */
:root{
  --c-deep:#05192A;
  --c-panel:#0A2941;
  --c-line:#17384F;
  --c-cyan:#38F2D2;
  --c-cyan-dim:#1BA592;
  --c-orange:#FF8A3D;
  --c-orange-soft:#FFC08A;
  --c-text:#EAF4F7;
  --c-muted:#8FA6B5;
  --grad-water:linear-gradient(140deg,#0A2941 0%,#134A5E 55%,#1BA592 100%);

  --font-display:'Oswald','Barlow Condensed','Noto Sans SC','PingFang SC',sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','Roboto Mono',ui-monospace,SFMono-Regular,Consolas,monospace;

  --maxw:1280px;
  --pad-x:clamp(16px,4vw,48px);
  --gap:24px;
  --line:1px solid var(--c-line);
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--c-deep);
  background-image:
    linear-gradient(rgba(23,56,79,.34) 1px,transparent 1px),
    linear-gradient(90deg,rgba(23,56,79,.34) 1px,transparent 1px);
  background-size:120px 120px,120px 120px;
  color:var(--c-text);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
main{display:block}
#main-content{scroll-margin-top:132px}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.08;letter-spacing:.01em}
p{max-width:70ch}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* 焦点环：深底上始终可见 */
:focus-visible{outline:2px solid var(--c-cyan);outline-offset:3px}

/* ---------- 4. 布局工具 ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad-x)}
.section{padding-block:clamp(56px,8vw,120px)}
.section--tight{padding-block:clamp(32px,4vw,64px)}
.rule{height:1px;background:var(--c-line);border:0;margin-block:clamp(24px,3vw,40px)}
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* ---------- 5. 文本组件 ---------- */
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--c-muted)
}
.display{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(56px,9vw,132px);line-height:.92;letter-spacing:-.005em;color:var(--c-text)
}
.section-title{font-size:clamp(28px,3.4vw,48px);color:var(--c-text)}
.lede{font-size:clamp(16px,1.35vw,20px);color:var(--c-muted);max-width:62ch}
.index-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--c-muted)}

/* ---------- 6. 按钮与标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 22px;border:1px solid var(--c-line);background:transparent;
  color:var(--c-text);font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;
  cursor:pointer;text-align:center;
  transition:background .2s ease,color .2s ease,border-color .2s ease
}
.btn:hover{color:var(--c-orange-soft);border-color:var(--c-orange)}
.btn--orange{background:var(--c-orange);border-color:var(--c-orange);color:var(--c-deep)}
.btn--orange:hover{background:var(--c-orange-soft);border-color:var(--c-orange-soft);color:var(--c-deep)}
.btn--cyan{border-color:var(--c-cyan);color:var(--c-cyan)}
.btn--cyan:hover{background:var(--c-cyan);border-color:var(--c-cyan);color:var(--c-deep)}
.btn--ghost{border-color:var(--c-line);color:var(--c-muted)}
.btn--ghost:hover{border-color:var(--c-cyan);color:var(--c-cyan)}

.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 10px;
  border:1px solid var(--c-cyan-dim);color:var(--c-cyan);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;white-space:nowrap
}
.tag--orange{border-color:var(--c-orange);color:var(--c-orange)}

/* ---------- 7. 面板与卡片 ---------- */
.panel{background:var(--c-panel);border:var(--line);padding:clamp(20px,2.4vw,32px)}
.panel--flush{padding:0}
.card{
  position:relative;display:block;background:var(--c-panel);border:var(--line);
  padding:clamp(18px,2vw,26px);color:var(--c-text);
  transition:border-color .25s ease,transform .25s ease
}
.card:hover{border-color:var(--c-orange);color:var(--c-text)}
.card__title{font-family:var(--font-display);font-size:clamp(20px,2vw,28px);margin-bottom:10px}
.card__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--c-muted)}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--c-muted)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;list-style:none;margin:0;padding:0}
.breadcrumb__list li{display:inline-flex;align-items:center;gap:10px}
.breadcrumb__list li+li::before{content:"/";color:var(--c-line)}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-orange-soft)}
.breadcrumb [aria-current="page"]{color:var(--c-cyan)}

/* ---------- 9. 图片容器（页面阶段放图占位） ---------- */
.media-frame{
  position:relative;display:block;width:100%;overflow:hidden;
  background:var(--grad-water);border:var(--line)
}
.media-frame::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(rgba(56,242,210,.10),transparent 62%)
}
.media-frame > img,
.media-frame > video{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media-frame--16x9{aspect-ratio:16 / 9}
.media-frame--4x3{aspect-ratio:4 / 3}
.media-frame--1x1{aspect-ratio:1 / 1}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame__caption{
  position:absolute;left:0;bottom:0;z-index:2;margin:0;padding:10px 14px;
  background:rgba(5,25,42,.86);color:var(--c-text);
  font-size:13px;line-height:1.5;max-width:76%
}
.media-frame__badge{
  position:absolute;right:12px;bottom:12px;z-index:2;padding:4px 10px;
  background:var(--c-orange);color:var(--c-deep);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em
}

/* ---------- 10. 显现动效协议 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11. 刊头 ---------- */
.skip-link{
  position:absolute;left:14px;top:-72px;z-index:90;
  padding:10px 16px;background:var(--c-cyan);color:var(--c-deep);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
  transition:top .2s ease
}
.skip-link:focus{top:12px;color:var(--c-deep)}

.masthead{
  position:sticky;top:0;z-index:60;
  background:rgba(5,25,42,.94);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--c-line)
}
.masthead__progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(23,56,79,.65);overflow:hidden;pointer-events:none
}
.masthead__progress-bar{
  display:block;width:100%;height:100%;transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--c-cyan-dim) 0%,var(--c-cyan) 62%,var(--c-orange) 100%)
}
.masthead__inner{
  position:relative;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:22px var(--pad-x) 16px;
  display:flex;flex-direction:column;align-items:center;gap:16px
}
.masthead__brandline{
  position:relative;display:flex;justify-content:center;align-items:flex-end;
  gap:16px;width:100%
}
.brand{display:flex;flex-direction:column;align-items:center;gap:6px;color:var(--c-text)}
.brand:hover{color:var(--c-text)}
.brand__mark{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(30px,4.6vw,58px);line-height:1;letter-spacing:.08em;
  transition:font-size .25s ease,letter-spacing .25s ease
}
.brand__sub{
  display:block;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.28em;color:var(--c-muted);text-transform:uppercase
}
.masthead__rule{display:block;width:100%;height:1px;background:var(--c-line)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;border:1px solid var(--c-line);background:var(--c-panel);
  color:var(--c-cyan);font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  cursor:pointer;transition:border-color .2s ease,color .2s ease
}
.nav-toggle:hover{border-color:var(--c-cyan)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:14px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:currentColor;
  transition:transform .25s ease,top .25s ease,bottom .25s ease
}
.nav-toggle__bars::before{top:2px}
.nav-toggle__bars::after{bottom:2px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:6px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:6px;transform:rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

.primary-nav{width:100%}
.primary-nav__list{
  display:flex;flex-wrap:wrap;justify-content:center;align-items:center;
  gap:clamp(18px,3vw,44px);list-style:none;margin:0;padding:0
}
.primary-nav__link{
  position:relative;display:inline-block;padding:4px 2px;
  font-size:14px;letter-spacing:.16em;color:var(--c-muted)
}
.primary-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left center;
  transition:transform .25s ease
}
.primary-nav__link:hover{color:var(--c-orange-soft)}
.primary-nav__link:hover::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{color:var(--c-cyan)}
.primary-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--c-cyan)}

/* 滚动后收为细条 */
.masthead.is-condensed .masthead__inner{
  flex-direction:row;justify-content:space-between;align-items:center;
  gap:clamp(16px,3vw,40px);padding:12px var(--pad-x)
}
.masthead.is-condensed .masthead__brandline{width:auto;justify-content:flex-start}
.masthead.is-condensed .brand{align-items:flex-start}
.masthead.is-condensed .brand__mark{font-size:clamp(20px,2.2vw,28px);letter-spacing:.12em}
.masthead.is-condensed .brand__sub{display:none}
.masthead.is-condensed .masthead__rule{display:none}
.masthead.is-condensed .primary-nav{width:auto}
.masthead.is-condensed .primary-nav__list{gap:clamp(14px,2vw,32px)}

/* 悬浮标签 */
.float-tags{
  position:fixed;right:clamp(12px,2vw,28px);top:50%;z-index:55;
  transform:translateY(-50%);
  display:flex;flex-direction:column;gap:12px
}
.float-tag{
  display:inline-flex;align-items:center;gap:8px;
  writing-mode:vertical-rl;
  padding:16px 10px;border:1px solid var(--c-cyan-dim);
  background:rgba(10,41,65,.78);
  color:var(--c-cyan);font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  transition:background .2s ease,color .2s ease,border-color .2s ease
}
.float-tag--orange{border-color:var(--c-orange);color:var(--c-orange)}
.float-tag:hover{background:var(--c-cyan);border-color:var(--c-cyan);color:var(--c-deep)}
.float-tag--orange:hover{background:var(--c-orange);border-color:var(--c-orange);color:var(--c-deep)}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,8vw,120px);
  background:var(--c-panel);border-top:1px solid var(--c-line)
}
.feedback-bar{
  border-bottom:1px solid var(--c-line);
  background:linear-gradient(90deg,rgba(56,242,210,.10) 0%,transparent 58%)
}
.feedback-bar__inner{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:14px var(--pad-x);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px
}
.feedback-bar__label{
  margin:0;font-family:var(--font-mono);font-size:13px;
  letter-spacing:.1em;color:var(--c-text)
}
.feedback-bar__toggle{
  padding:10px 18px;border:1px solid var(--c-orange);background:transparent;
  color:var(--c-orange);font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  cursor:pointer;transition:background .2s ease,color .2s ease
}
.feedback-bar__toggle:hover{background:var(--c-orange);color:var(--c-deep)}
.feedback-bar__panel{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:0 var(--pad-x) 24px;
  border-top:1px solid var(--c-line);
  padding-top:20px
}
.feedback-bar__note{margin-bottom:10px;font-size:15px;color:var(--c-muted);max-width:72ch}
.feedback-bar__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}

.footer-main{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--pad-x)
}
.footer-brand{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 28px;
  padding-bottom:clamp(24px,3vw,36px);
  border-bottom:1px solid var(--c-line);
  margin-bottom:clamp(28px,4vw,48px)
}
.footer-brand__mark{
  margin:0;font-family:var(--font-display);font-weight:700;
  font-size:clamp(26px,3vw,40px);line-height:1;letter-spacing:.08em;color:var(--c-text)
}
.footer-brand__line{margin:0;font-size:15px;color:var(--c-muted);max-width:36ch}
.footer-brand__meta{
  margin:0;font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--c-cyan-dim)
}
.footer-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(24px,3vw,44px)
}
.footer-col__title{
  margin:0 0 16px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--c-cyan)
}
.footer-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-list a{color:var(--c-muted);font-size:15px}
.footer-list a:hover{color:var(--c-orange-soft)}
.footer-contact{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.footer-contact__item{display:grid;gap:4px}
.footer-contact__label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--c-cyan-dim)
}
.footer-contact__value{font-size:14px;line-height:1.6;color:var(--c-text);word-break:break-word}

.footer-bottom{border-top:1px solid var(--c-line)}
.footer-bottom__inner{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:18px var(--pad-x);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 28px;font-size:13px;color:var(--c-muted)
}
.footer-bottom__legal{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em}
.footer-bottom__links{display:flex;flex-wrap:wrap;gap:20px;list-style:none;margin:0;padding:0}
.footer-bottom__links a{color:var(--c-muted);font-size:13px}
.footer-bottom__links a:hover{color:var(--c-orange-soft)}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1100px){
  .span-3,.span-4,.span-5{grid-column:span 6}
}
@media (max-width:1024px){
  .float-tags{
    position:static;transform:none;flex-direction:row;justify-content:center;
    gap:12px;padding:0 var(--pad-x) 14px
  }
  .float-tag{writing-mode:horizontal-tb;padding:10px 16px;letter-spacing:.14em}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:880px){
  .nav-toggle{display:inline-flex;position:absolute;right:0;top:50%;transform:translateY(-50%)}
  .masthead__inner{padding:16px var(--pad-x) 14px;gap:12px}
  .masthead__brandline{align-items:center}
  .brand__mark{font-size:clamp(24px,6.4vw,32px)}
  .brand__sub{letter-spacing:.2em}

  /* 移动端刊头恒为两行：品牌一行、栏目一行 */
  .masthead.is-condensed .masthead__inner{flex-direction:column;align-items:center;gap:12px;padding:14px var(--pad-x) 12px}
  .masthead.is-condensed .masthead__brandline{width:100%;justify-content:center}
  .masthead.is-condensed .brand{align-items:center}
  .masthead.is-condensed .brand__mark{font-size:clamp(24px,6.4vw,32px);letter-spacing:.08em}
  .masthead.is-condensed .brand__sub{display:block}
  .masthead.is-condensed .masthead__rule{display:block}
  .masthead.is-condensed .primary-nav{width:100%}

  .primary-nav{display:none;width:100%;border-top:1px solid var(--c-line);padding-top:12px}
  .masthead[data-open] .primary-nav{display:block}
  .primary-nav__list{
    flex-wrap:nowrap;justify-content:flex-start;gap:24px;
    overflow-x:auto;padding-bottom:6px;scrollbar-width:thin
  }
  .primary-nav__link{white-space:nowrap;font-size:13px}

  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9{grid-column:span 12}
  .grid-12{gap:16px}
  .footer-brand{flex-direction:column;align-items:flex-start}
}
@media (max-width:600px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start}
  .feedback-bar__inner{align-items:flex-start;flex-direction:column}
  .feedback-bar__toggle{width:100%}
  .btn{width:100%}
  .feedback-bar__actions{flex-direction:column}
}

/* ---------- 14. 动效克制 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important
  }
  html.js [data-reveal]{opacity:1;transform:none}
}