/* ==========================================================================
   乐天堂服务 · 共享样式 / assets/site.css
   桌面工作台语汇：深海蓝基底 · 奶油白纸面 · 暖橘信号 · 薄荷状态
   ========================================================================== */

:root{
  --navy:#0F2A44;
  --navy-deep:#0A1E33;
  --cream:#FFF7EC;
  --sand:#F4EBDD;
  --orange:#FF6B35;
  --orange-soft:#FF8A5E;
  --mint:#3DDC97;
  --stone:#6B6F73;
  --line:#C9C2B6;
  --clay:#B45F3C;
  --moss:#4F6B57;
  --ink:#101820;

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

  --maxw:1280px;
  --gutter:clamp(20px,5vw,72px);
  --header-h:70px;
  --radius:3px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 20px);
}

body{
  margin:0;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-title);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
}

p{margin:0;}
ul,ol{margin:0;padding-left:1.2em;}
dl,dt,dd{margin:0;}
figure,blockquote{margin:0;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:none;}
img,svg,video{display:block;max-width:100%;}
table{border-collapse:collapse;}

:focus-visible{
  outline:2px solid var(--orange);
  outline-offset:3px;
  border-radius:1px;
}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--mint);}

.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 ---------- */
.skip-link{
  position:fixed;
  top:12px;left:12px;
  z-index:400;
  padding:10px 18px;
  background:var(--orange);
  color:#16110D;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  border-radius:2px;
  box-shadow:0 12px 26px -18px rgba(16,24,32,.9);
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 站点头部 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  color:var(--cream);
  background:transparent;
  border-bottom:1px solid rgba(255,247,236,.14);
  transition:background .32s var(--ease),
             border-color .32s var(--ease),
             box-shadow .32s var(--ease);
}
.site-header.is-scrolled,
.site-header.is-nav-open{
  background:var(--navy);
  border-bottom-color:rgba(201,194,182,.26);
  box-shadow:0 16px 34px -30px rgba(16,24,32,.95);
}

.site-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(16px,3vw,40px);
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:none;
}
.brand__mark{
  width:20px;
  height:20px;
  flex:none;
  background:var(--orange);
  clip-path:polygon(0 0,100% 0,100% 64%,64% 100%,0 100%);
  transition:background .25s var(--ease);
}
.brand:hover .brand__mark{background:var(--mint);}
.brand__text{
  display:flex;
  flex-direction:column;
  gap:1px;
  line-height:1.1;
}
.brand__name{
  font-family:var(--font-title);
  font-weight:800;
  font-size:17px;
  letter-spacing:-.01em;
  color:var(--cream);
}
.brand__tagline{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:rgba(255,247,236,.55);
}

/* 导航 */
.nav{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,28px);
  margin-left:auto;
}
.nav__list{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.8vw,26px);
  margin:0;
  padding:0;
  list-style:none;
}
.nav__item{display:block;}
.nav__link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  white-space:nowrap;
  color:rgba(255,247,236,.74);
  transition:color .2s var(--ease);
}
.nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--ease);
}
.nav__link:hover,
.nav__link:focus-visible{color:var(--cream);}
.nav__link:hover::after,
.nav__link:focus-visible::after{transform:scaleX(1);}
.nav__link[aria-current="page"]{color:var(--orange);}
.nav__link[aria-current="page"]::after{transform:scaleX(1);}

.nav__cta{
  padding:.55em 1.05em;
  white-space:nowrap;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:8px 12px 8px 14px;
  border:1px solid rgba(201,194,182,.42);
  border-radius:2px;
  color:var(--cream);
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange);}
.nav-toggle__label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
}
.nav-toggle__bars{
  display:grid;
  gap:4px;
  width:16px;
}
.nav-toggle__bar{
  display:block;
  height:1.5px;
  background:currentColor;
  transition:transform .25s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child{transform:translateY(2.75px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child{transform:translateY(-2.75px) rotate(-45deg);}

/* 阅读进度 */
.header-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  pointer-events:none;
  background:transparent;
}
.header-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--orange),var(--mint));
  transition:width .12s linear;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.62em 1.18em;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  line-height:1.4;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  transition:background .22s var(--ease),
             color .22s var(--ease),
             border-color .22s var(--ease),
             transform .22s var(--ease);
}
.btn--primary{
  background:var(--orange);
  color:#16110D;
  font-weight:600;
}
.btn--primary:hover{background:var(--orange-soft);transform:translateY(-1px);}
.btn--ghost{
  border-color:rgba(255,247,236,.32);
  color:var(--cream);
}
.btn--ghost:hover{
  border-color:var(--cream);
  background:rgba(255,247,236,.08);
}
.btn--quiet{
  border-color:var(--line);
  color:var(--ink);
}
.btn--quiet:hover{
  border-color:var(--orange);
  color:var(--clay);
  background:rgba(255,107,53,.05);
}

/* ---------- 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:820px;}

.section{
  padding-block:clamp(48px,7vw,104px);
}
.section--sand{background:var(--sand);}
.section--navy{background:var(--navy);color:var(--cream);}

/* 首屏与内页页头（含固定头部高度补偿） */
.hero{
  position:relative;
  overflow:hidden;
  background:var(--navy);
  color:var(--cream);
  padding-top:calc(var(--header-h) + clamp(44px,7vw,96px));
  padding-bottom:clamp(48px,8vw,104px);
}
.page-head{
  background:var(--navy);
  color:var(--cream);
  padding-top:calc(var(--header-h) + clamp(32px,4.5vw,60px));
  padding-bottom:clamp(32px,4.5vw,60px);
}

/* ---------- 文字组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.65em;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--clay);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:currentColor;
  flex:none;
}
.section--navy .eyebrow,
.hero .eyebrow,
.page-head .eyebrow{color:var(--mint);}

.mono{
  font-family:var(--font-mono);
  font-size:.86em;
  letter-spacing:.06em;
}

.lede{
  max-width:46ch;
  font-size:clamp(17px,1.5vw,20px);
  line-height:1.8;
  color:var(--stone);
}
.hero .lede,
.page-head .lede,
.section--navy .lede{color:rgba(255,247,236,.76);}

.prose{
  max-width:68ch;
}
.prose p + p{margin-top:1.1em;}
.prose h2{margin-top:2.2em;font-size:clamp(26px,3vw,36px);}
.prose h3{margin-top:1.8em;font-size:clamp(20px,2.2vw,25px);}
.prose ul,.prose ol{margin-top:.9em;}
.prose li + li{margin-top:.4em;}

/* ---------- 网格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}

/* ---------- 左侧索引轨道 ---------- */
.rail{
  position:sticky;
  top:calc(var(--header-h) + 32px);
  display:grid;
  gap:9px;
  align-content:start;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.rail__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding-left:14px;
  border-left:1px solid var(--line);
  color:var(--stone);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.rail__link:hover{color:var(--clay);border-left-color:var(--orange);}
.rail__link[aria-current="true"]{
  color:var(--clay);
  border-left-color:var(--orange);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumb__item{
  display:flex;
  align-items:center;
  gap:8px;
  color:rgba(255,247,236,.6);
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:rgba(201,194,182,.55);
}
.breadcrumb__link{
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.breadcrumb__link:hover{
  color:var(--orange);
  border-bottom-color:var(--orange);
}
.breadcrumb__current{color:var(--cream);}

/* ---------- 标签与状态 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--stone);
  background:transparent;
}
.tag--clay{
  border-color:rgba(180,95,60,.45);
  color:var(--clay);
}
.tag--mint{
  border-color:rgba(61,220,151,.5);
  color:#1F7A52;
}

.status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--moss);
}
.status__dot{
  width:7px;
  height:7px;
  flex:none;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(61,220,151,.16);
  animation:statusPulse 3.2s ease-in-out infinite;
}
@keyframes statusPulse{
  0%,100%{box-shadow:0 0 0 3px rgba(61,220,151,.16);}
  50%{box-shadow:0 0 0 6px rgba(61,220,151,.04);}
}

/* ---------- 控制台面板 ---------- */
.panel{
  background:#FFFCF6;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 22px 48px -42px rgba(16,24,32,.75);
  overflow:hidden;
}
.panel__head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding:14px 20px;
  border-bottom:1px solid var(--line);
  background:rgba(244,235,221,.5);
}
.panel__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--stone);
}
.panel__body{padding:20px;}

/* ---------- 图片容器 ---------- */
.figure{
  display:grid;
  gap:10px;
}
.figure__media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    linear-gradient(135deg,rgba(255,107,53,.12),rgba(15,42,68,.06) 55%,rgba(61,220,151,.12)),
    var(--sand);
  aspect-ratio:16 / 10;
}
.figure__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  transition:transform .6s var(--ease);
}
.figure:hover .figure__img{transform:scale(1.03);}
.figure--tall .figure__media{aspect-ratio:4 / 5;}
.figure--wide .figure__media{aspect-ratio:21 / 9;}
.figure__caption{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--stone);
}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}
[data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--navy);
  color:rgba(255,247,236,.78);
  border-top:1px solid rgba(201,194,182,.2);
  padding-top:clamp(48px,7vw,88px);
}
.footer__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer__grid{
  display:grid;
  grid-template-columns:minmax(280px,1.7fr) repeat(3,minmax(120px,.75fr));
  gap:clamp(28px,4vw,56px);
  padding-bottom:clamp(36px,5vw,64px);
}
.footer__brand{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.footer__brand-line{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-title);
  font-weight:800;
  font-size:19px;
  letter-spacing:-.01em;
  color:var(--cream);
}
.footer__note{
  max-width:46ch;
  font-size:13px;
  line-height:1.75;
  color:rgba(255,247,236,.56);
}
.footer__contact{
  display:grid;
  gap:9px;
}
.footer__contact-item{
  display:flex;
  align-items:baseline;
  gap:12px;
  font-size:14px;
  line-height:1.6;
}
.footer__contact-key{
  flex:none;
  min-width:34px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mint);
}
.footer__contact-value{
  color:rgba(255,247,236,.8);
  overflow-wrap:anywhere;
}
.footer__group{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.footer__group-title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(201,194,182,.72);
}
.footer__list{
  display:grid;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer__link{
  font-size:14px;
  color:rgba(255,247,236,.78);
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer__link:hover{
  color:var(--orange);
  border-bottom-color:var(--orange);
}
.footer__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 28px;
  padding-block:clamp(18px,2.6vw,26px);
  border-top:1px solid rgba(201,194,182,.2);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:rgba(255,247,236,.52);
}
.footer__copyright,
.footer__icp{margin:0;}

body.is-nav-locked{overflow:hidden;}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1024px){
  .footer__grid{
    grid-template-columns:minmax(240px,1.4fr) repeat(3,minmax(100px,.8fr));
  }
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
}

@media (max-width:960px){
  :root{--header-h:62px;}

  .nav-toggle{display:inline-flex;}

  .nav{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    z-index:118;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:20px var(--gutter) 36px;
    background:var(--navy);
    border-bottom:1px solid rgba(201,194,182,.26);
    box-shadow:0 30px 50px -40px rgba(16,24,32,1);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-12px);
    transition:opacity .26s var(--ease),
               transform .26s var(--ease),
               visibility .26s var(--ease);
  }
  .nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }

  .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    counter-reset:navitem;
  }
  .nav__link{
    display:flex;
    align-items:baseline;
    justify-content:space-between;
    width:100%;
    padding:14px 2px;
    font-family:var(--font-title);
    font-weight:700;
    font-size:16px;
    letter-spacing:0;
    border-bottom:1px solid rgba(201,194,182,.16);
    color:rgba(255,247,236,.84);
  }
  .nav__link::before{
    counter-increment:navitem;
    content:"0" counter(navitem);
    order:2;
    font-family:var(--font-mono);
    font-size:11px;
    font-weight:400;
    letter-spacing:.12em;
    color:rgba(201,194,182,.6);
  }
  .nav__link::after{display:none;}
  .nav__link[aria-current="page"]{color:var(--orange);}
  .nav__link[aria-current="page"]::before{color:var(--orange);}

  .nav__cta{
    margin-top:22px;
    padding:.85em 1.2em;
    align-self:flex-start;
  }

  .site-header.is-nav-open{background:var(--navy);}
}

@media (max-width:760px){
  .footer__grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:32px 24px;
  }
  .footer__brand{grid-column:1 / -1;}
}

@media (max-width:640px){
  body{font-size:16px;}
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .brand__tagline{letter-spacing:.2em;}
  .footer__grid{grid-template-columns:minmax(0,1fr);}
  .footer__meta{
    flex-direction:column;
    gap:6px;
  }
  .figure__media{aspect-ratio:4 / 3;}
}

@media (max-width:420px){
  .nav__cta{
    align-self:stretch;
    justify-content:center;
  }
}

/* ==========================================================================
   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;
  }
  [data-reveal]{
    opacity:1;
    transform:none;
  }
  .status__dot{
    animation:none;
    box-shadow:0 0 0 3px rgba(61,220,151,.18);
  }
  .header-progress__bar{transition:none;}
  .figure:hover .figure__img{transform:none;}
}