/* ============================================================
   优乐玩品牌站 · 共享样式 /assets/site.css
   入口地图系统：深海墨蓝工作台 + 青柠路径线 + 暖橘首次入口
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-deep:#0E1B2A;
  --ink-bench:#13263A;
  --ink-teal:#1E3A52;
  --lime:#B7F34A;
  --lime-soft:#C8FF63;
  --orange:#FF8A3D;
  --mist:#B9C7D2;
  --paper:#F3F1E8;
  --sage:#D7E0D4;
  --ink-text:#0B1622;
  --slate:#8FA3B3;

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

  --rail-w:88px;
  --maxw:1320px;
  --pad:clamp(16px,3.2vw,40px);
  --gap:8px;
  --radius:2px;
  --line:rgba(185,199,210,.20);
  --line-strong:rgba(185,199,210,.34);
  --line-lime:rgba(183,243,74,.36);
  --line-orange:rgba(255,138,61,.48);
  --z-header:80;
}

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

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

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

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

hr{border:0;}

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;cursor:pointer;}

table{border-collapse:collapse;width:100%;}

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

/* ---------- 3. 基础排版 ---------- */
body{
  background:var(--ink-deep);
  color:var(--mist);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

@media (min-width:1100px){
  body{padding-left:var(--rail-w);}
}

main{display:block;}
#main-content:focus{outline:none;}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  color:#fff;
  line-height:1.16;
  letter-spacing:-.005em;
}

h1{font-size:clamp(40px,6vw,88px);}
h2{font-size:clamp(30px,4.2vw,56px);}
h3{font-size:clamp(22px,2.4vw,30px);}
h4{font-size:20px;}

p{max-width:68ch;}

strong{color:#fff;font-weight:700;}

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

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

.rule{
  height:1px;
  width:100%;
  background:var(--line);
  border:0;
  margin-block:clamp(20px,3vw,36px);
}

/* ---------- 4. 布局与容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.section{padding-block:clamp(40px,6vw,88px);}

.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px 32px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,3vw,36px);
  border-bottom:1px solid var(--line);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.22em;
  color:var(--lime);
  text-transform:uppercase;
}

.eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  background:var(--orange);
}

.grid{display:grid;gap:clamp(12px,1.6vw,20px);}

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

@media (max-width:767px){
  .grid--12{grid-template-columns:repeat(4,minmax(0,1fr));}
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:11px 18px;
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.04em;
  text-align:center;
  color:var(--mist);
  background:transparent;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}

.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(0);}

.btn--lime{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink-text);
}
.btn--lime:hover{background:var(--lime-soft);border-color:var(--lime-soft);}

.btn--ghost{
  color:var(--mist);
  border-color:var(--line-strong);
  background:rgba(185,199,210,.04);
}
.btn--ghost:hover{
  color:var(--lime);
  border-color:var(--line-lime);
  background:rgba(183,243,74,.08);
}

.btn--orange{
  color:var(--orange);
  border-color:var(--line-orange);
  background:rgba(255,138,61,.08);
}
.btn--orange:hover{color:#FFA76A;background:rgba(255,138,61,.16);}

/* ---------- 6. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:12px;
  z-index:200;
  padding:10px 16px;
  background:var(--lime);
  color:var(--ink-text);
  font-weight:700;
  font-size:14px;
  letter-spacing:.04em;
  border-radius:var(--radius);
  transition:top .18s ease;
}
.skip-link:focus{top:12px;}

/* ---------- 7. 页头：边框式导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:var(--z-header);
  background:var(--ink-deep);
  border-bottom:1px solid var(--line-lime);
}

.header-meter{
  position:relative;
  height:2px;
  background:rgba(183,243,74,.12);
  overflow:hidden;
}

.header-meter__bar{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--lime) 0%,var(--orange) 100%);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .1s linear;
}

.header-strip{
  background:var(--ink-bench);
  border-bottom:1px solid var(--line);
}

.header-strip__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:32px;
}

.header-strip__status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--mist);
}

.header-strip__status::before{
  content:"";
  width:6px;
  height:6px;
  background:var(--orange);
  transform:rotate(45deg);
  flex:0 0 auto;
}

.header-strip__meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--slate);
}

.site-header__bar{
  position:relative;
  z-index:3;
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,32px);
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
  min-height:68px;
  background:var(--ink-deep);
}

/* 品牌锁定区 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding-block:10px;
}

.brand__mark{
  position:relative;
  width:30px;
  height:30px;
  flex:0 0 auto;
  border:1px solid var(--line-lime);
  background:linear-gradient(135deg,rgba(183,243,74,.16),transparent 62%);
}

.brand__mark::before{
  content:"";
  position:absolute;
  left:4px;
  bottom:4px;
  width:8px;
  height:8px;
  background:var(--orange);
}

.brand__mark::after{
  content:"";
  position:absolute;
  right:4px;
  top:6px;
  width:12px;
  height:1px;
  background:var(--lime);
  box-shadow:0 4px 0 var(--lime);
}

.brand__text{
  display:flex;
  flex-direction:column;
  gap:3px;
}

.brand__line{
  font-family:var(--font-sans);
  font-weight:900;
  font-size:15px;
  line-height:1.2;
  letter-spacing:.06em;
  color:#fff;
}

.brand__sub{
  font-size:10px;
  line-height:1.1;
  letter-spacing:.2em;
  color:var(--slate);
}

/* 主导航 */
.site-nav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:clamp(10px,1.6vw,24px);
  flex:1 1 auto;
  margin-inline-start:auto;
}

.site-nav__list{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:2px;
  counter-reset:navidx;
  list-style:none;
  margin:0;
  padding:0;
}

.site-nav__item{
  counter-increment:navidx;
  position:relative;
}

.site-nav__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 11px;
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  white-space:nowrap;
  color:var(--mist);
  border:1px solid transparent;
  border-radius:var(--radius);
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}

.site-nav__link::before{
  content:"0" counter(navidx);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--slate);
  transition:color .18s ease;
}

.site-nav__link:hover{
  color:var(--lime);
  border-color:var(--line);
  background:rgba(183,243,74,.07);
}
.site-nav__link:hover::before{color:var(--lime);}

.site-nav__link[aria-current="page"]{
  color:var(--lime);
  border-color:var(--line-lime);
  background:rgba(183,243,74,.11);
}
.site-nav__link[aria-current="page"]::before{color:var(--orange);}

.site-nav__link--entry{color:#fff;}

.site-nav__icon{
  width:7px;
  height:7px;
  flex:0 0 auto;
  background:var(--orange);
  transform:rotate(45deg);
  box-shadow:0 0 0 3px rgba(255,138,61,.16);
}

.header-cta{flex:0 0 auto;white-space:nowrap;}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-inline-start:auto;
  padding:8px 12px;
  color:var(--mist);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
}
.nav-toggle:hover{color:var(--lime);border-color:var(--line-lime);}

.nav-toggle__bars{
  display:flex;
  flex-direction:column;
  gap:4px;
  width:16px;
}

.nav-toggle__bar{
  display:block;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform .2s ease;
}

.nav-toggle__label{
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
}

.nav-scrim{
  display:none;
  position:fixed;
  inset:0;
  z-index:1;
  background:rgba(11,22,34,.62);
  opacity:0;
  visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;
}

/* 左侧常驻入口栏 */
.entry-rail{
  display:none;
  position:fixed;
  inset-block:0;
  inset-inline-start:0;
  width:var(--rail-w);
  z-index:70;
  background:linear-gradient(180deg,var(--ink-bench) 0%,var(--ink-deep) 62%);
  border-right:1px solid var(--line);
}

@media (min-width:1100px){
  .entry-rail{display:flex;}
}

.entry-rail__link{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:16px;
  width:100%;
  height:100%;
  padding:24px 0;
  border-right:1px solid transparent;
  transition:background-color .2s ease,border-color .2s ease;
}
.entry-rail__link:hover{
  background:rgba(183,243,74,.06);
  border-right-color:var(--line-lime);
}

.entry-rail__icon{
  width:10px;
  height:10px;
  background:var(--orange);
  transform:rotate(45deg);
  box-shadow:0 0 0 4px rgba(255,138,61,.18);
}

.entry-rail__label{
  writing-mode:vertical-rl;
  font-family:var(--font-sans);
  font-weight:900;
  font-size:14px;
  letter-spacing:.3em;
  color:var(--lime);
}

.entry-rail__meta{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  color:var(--slate);
}

/* ---------- 8. 页脚：资源抽屉 ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,104px);
  background:var(--ink-bench);
  border-top:1px solid var(--line-lime);
  color:var(--mist);
}

.footer-drawer{
  background:var(--ink-deep);
  border-bottom:1px solid var(--line);
  padding-block:clamp(24px,4vw,40px);
}

.footer-drawer__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:6px 24px;
  margin-bottom:18px;
}

.footer-drawer__title{
  font-family:var(--font-sans);
  font-weight:900;
  font-size:16px;
  letter-spacing:.16em;
  color:#fff;
}

.footer-drawer__note{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--slate);
}

.footer-drawer__track{
  display:grid;
  grid-auto-flow:column;
  grid-auto-columns:minmax(232px,1fr);
  gap:12px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:0 0 8px;
  margin:0;
  list-style:none;
  scrollbar-color:var(--ink-teal) transparent;
}

.drawer-box{
  scroll-snap-align:start;
  border:1px solid var(--line);
  background:var(--ink-bench);
  border-radius:var(--radius);
  transition:border-color .2s ease,background-color .2s ease;
}

.drawer-box:hover{
  border-color:var(--line-orange);
  background:var(--ink-teal);
}

.drawer-box__link{
  position:relative;
  display:grid;
  gap:6px;
  height:100%;
  padding:18px 18px 20px;
}

.drawer-box__label{
  font-size:11px;
  letter-spacing:.2em;
  color:var(--orange);
}

.drawer-box__name{
  font-family:var(--font-sans);
  font-weight:900;
  font-size:18px;
  letter-spacing:.04em;
  color:#fff;
}

.drawer-box__meta{
  font-size:12.5px;
  line-height:1.6;
  color:var(--slate);
  padding-right:18px;
}

.drawer-box__arrow{
  position:absolute;
  top:14px;
  right:16px;
  font-size:15px;
  color:var(--lime);
  transition:transform .2s ease;
}

.drawer-box:hover .drawer-box__arrow{transform:translate(2px,-2px);}

.footer-main{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(24px,4vw,44px);
  padding-block:clamp(32px,5vw,56px);
}

@media (min-width:760px){
  .footer-main{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (min-width:1100px){
  .footer-main{grid-template-columns:1.6fr 1fr 1fr 1.25fr;}
}

.footer-brand__line{
  font-family:var(--font-sans);
  font-weight:900;
  font-size:clamp(17px,1.8vw,21px);
  line-height:1.4;
  letter-spacing:.05em;
  color:#fff;
  max-width:22ch;
}

.footer-brand__note{
  margin-top:12px;
  font-size:13.5px;
  line-height:1.75;
  color:var(--slate);
  max-width:34ch;
}

.footer-brand .btn{margin-top:18px;}

.footer-col__title{
  font-family:var(--font-sans);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--lime);
  margin-bottom:14px;
}

.footer-links{
  display:grid;
  gap:8px;
  list-style:none;
  margin:0;
  padding:0;
}

.footer-link{
  display:inline-block;
  width:fit-content;
  padding-block:2px;
  font-size:14.5px;
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}

.footer-link:hover{
  color:var(--lime);
  border-bottom-color:var(--line-lime);
}

.footer-link[aria-current="page"]{color:var(--lime);}

.footer-contact{
  display:grid;
  gap:8px;
  justify-items:start;
}

.footer-contact__item{
  font-size:13.5px;
  line-height:1.7;
  color:var(--mist);
}

.footer-contact__item--mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:#fff;
}

.footer-bottom{
  border-top:1px solid var(--line);
  padding-block:18px;
}

.footer-bottom__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
}

.footer-bottom__legal{
  display:flex;
  flex-wrap:wrap;
  gap:6px 18px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--slate);
  max-width:none;
}

.footer-legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

.footer-legal-links .footer-link{font-size:12.5px;}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:70;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--lime);
  background:var(--ink-teal);
  border:1px solid var(--line-lime);
  border-radius:var(--radius);
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}

.to-top.is-on{
  opacity:1;
  visibility:visible;
  transform:none;
}

/* ---------- 9. 页面基础件 ---------- */
.breadcrumb{
  padding-block:12px;
  border-bottom:1px solid var(--line);
}

.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
  margin:0;
  padding:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--slate);
}

.breadcrumb__item{
  display:inline-flex;
  align-items:center;
  gap:8px;
}

.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:var(--slate);
  opacity:.6;
}

.breadcrumb__link{color:var(--mist);}
.breadcrumb__link:hover{color:var(--lime);}

.breadcrumb__current{color:var(--lime);}

/* 图片容器基础规则（页面阶段填充占位图） */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink-teal);
  border:1px solid var(--line);
  border-radius:var(--radius);
}

.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.35;
  background-image:
    linear-gradient(90deg,rgba(183,243,74,.12) 1px,transparent 1px),
    linear-gradient(rgba(183,243,74,.12) 1px,transparent 1px);
  background-size:48px 48px;
}

.media-frame__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

.media-frame--wide{aspect-ratio:16 / 9;}
.media-frame--banner{aspect-ratio:21 / 9;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--portrait{aspect-ratio:3 / 4;}

.media-frame__cap{
  position:absolute;
  inset:auto 0 0 0;
  padding:8px 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
  background:linear-gradient(0deg,rgba(11,22,34,.88),transparent);
}

/* 滚动显现 */
.reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
}

.reveal.is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1099px){
  .site-header__bar{gap:16px;}
  .site-nav__link::before{display:none;}
}

@media (max-width:1023px){
  .nav-toggle{display:inline-flex;}

  .nav-scrim{display:block;}

  .site-header[data-open] .nav-scrim{
    opacity:1;
    visibility:visible;
  }

  .site-nav{
    position:absolute;
    inset-inline:0;
    top:100%;
    z-index:2;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:4px;
    max-height:calc(100vh - 100px);
    overflow-y:auto;
    padding:16px var(--pad) 24px;
    background:var(--ink-bench);
    border-bottom:1px solid var(--line-lime);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    pointer-events:none;
    transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  }

  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }

  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }

  .site-nav__item + .site-nav__item{border-top:1px solid var(--line);}

  .site-nav__link{
    width:100%;
    padding:14px 2px;
    font-size:15px;
    border:0;
    border-radius:0;
    background:transparent;
  }

  .site-nav__link::before{display:inline;}

  .site-nav__link:hover,
  .site-nav__link[aria-current="page"]{
    background:transparent;
    border-color:transparent;
  }

  .header-cta{
    width:100%;
    margin-top:16px;
    padding-block:13px;
  }

  .site-header[data-open] .nav-toggle__bar:first-child{
    transform:translateY(2.75px) rotate(45deg);
  }

  .site-header[data-open] .nav-toggle__bar:last-child{
    transform:translateY(-2.75px) rotate(-45deg);
  }
}

@media (max-width:767px){
  body{font-size:16px;}
  .header-strip__meta{display:none;}
  .brand__line{font-size:14px;}
  .brand__sub{display:none;}
  .site-header__bar{min-height:60px;}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start;}
  .to-top{right:12px;bottom:12px;}
}

@media (max-width:480px){
  .header-strip__status{font-size:10.5px;letter-spacing:.08em;}
  .drawer-box__name{font-size:16px;}
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth;}
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }

  .reveal,
  .reveal.is-visible{
    opacity:1;
    transform:none;
  }

  .header-meter__bar{transition:none;}
  .btn:hover{transform:none;}
  .to-top{transform:none;}
}