/* ============================================================
   KAIYUN · /assets/site.css
   框架式导航 + 右侧边线 + 夜场看台色彩体系
   ============================================================ */

*,
*::before,
*::after{box-sizing:border-box}

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

body{margin:0}

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

:root{
  --night-pitch:#061A13;
  --stand-green:#0D2E22;
  --cold-slate:#1B2E3A;
  --mist-blue:#6F8794;
  --lime:#D7FF3F;
  --silver:#C7D2D7;
  --paper:#F1F5F0;
  --ink:#10221B;
  --coral:#FF6A4D;
  --sheen:linear-gradient(135deg,#2A6150 0%,#1B2E3A 55%,#0A1D27 100%);
  --line:rgba(199,210,215,.22);
  --line-soft:rgba(199,210,215,.12);
  --line-strong:rgba(199,210,215,.45);
  --muted:#93A9B3;
  --font-sans:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --frame-x:clamp(16px,4vw,64px);
  --header-h:68px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

body{
  background:var(--night-pitch);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

::selection{background:var(--lime);color:var(--night-pitch)}

:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
}

/* ---------- 排版基元 ---------- */

h1,h2,h3,h4{font-weight:800;line-height:1.12;letter-spacing:-.01em}

.display{
  font-size:clamp(56px,9vw,132px);
  line-height:.9;
  font-weight:900;
  letter-spacing:-.03em;
  transform:skewX(-2deg);
}

.page-title{
  font-size:clamp(36px,5vw,72px);
  line-height:1.02;
  font-weight:900;
  letter-spacing:-.025em;
}

.section-title{
  font-size:clamp(28px,3.4vw,40px);
  font-weight:800;
  letter-spacing:-.015em;
}

.data-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--lime);
}

.eyebrow::before{content:"";width:24px;height:1px;background:var(--lime)}

.hairline{height:1px;background:var(--line);border:0;margin:0}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:.22em .62em;
  font-size:12px;
  line-height:1.5;
  letter-spacing:.06em;
  color:var(--silver);
  border:1px solid var(--line-strong);
  border-radius:2px;
}

.tag--lime{background:var(--lime);border-color:var(--lime);color:var(--night-pitch);font-weight:700}
.tag--coral{color:var(--coral);border-color:rgba(255,106,77,.55)}

/* ---------- 布局工具 ---------- */

.container{
  width:100%;
  max-width:1280px;
  margin-inline:auto;
  padding-inline:var(--frame-x);
}

.container--narrow{max-width:860px}

.section{padding-block:clamp(48px,7vw,104px)}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 图片容器基座（页面阶段放占位） ---------- */

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--sheen);
  border:1px solid var(--line);
}

.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.04);
}

.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(6,26,19,0) 45%,rgba(6,26,19,.62) 100%);
}

.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}

.media-frame__cap{
  position:absolute;
  left:12px;
  bottom:10px;
  z-index:2;
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--silver);
}

/* ---------- 按钮 ---------- */

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:.85em 1.35em;
  border:1px solid transparent;
  border-radius:0;
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}

.btn-sm{padding:.58em 1em;font-size:.84rem}

.btn-lime{background:var(--lime);color:var(--night-pitch)}
.btn-lime:hover{background:#E7FF7C}

.btn-line{border-color:var(--line-strong);color:var(--silver)}
.btn-line:hover{border-color:var(--lime);color:var(--lime)}

.btn-dark{background:var(--ink);color:var(--paper)}
.btn-dark:hover{background:#1B3A2E}

/* ---------- 面包屑 ---------- */

.breadcrumbs{
  font-size:12.5px;
  letter-spacing:.05em;
  color:var(--muted);
}

.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--line-strong)}
.breadcrumbs a{color:var(--silver);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumbs a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.breadcrumbs [aria-current="page"]{color:var(--paper)}

/* ---------- 浅色阅读页外壳 ---------- */

.theme-paper{background:var(--paper);color:var(--ink)}
.theme-paper :where(a,button,[tabindex]):focus-visible{outline-color:var(--ink)}
.theme-paper .hairline{background:rgba(16,34,27,.16)}
.theme-paper .eyebrow{color:#2C6B50}
.theme-paper .eyebrow::before{background:#2C6B50}
.theme-paper .breadcrumbs{color:#4A6357}
.theme-paper .breadcrumbs a{color:#1D4033}
.theme-paper .breadcrumbs a:hover{color:#2C6B50;border-bottom-color:#2C6B50}
.theme-paper .breadcrumbs [aria-current="page"]{color:var(--ink)}

.prose{font-size:17px;line-height:1.8;color:inherit}
.prose p + p{margin-top:1em}
.prose :where(h2,h3){margin-top:2em;margin-bottom:.6em}
.prose :where(ul,ol){margin:1em 0;padding-left:1.2em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.4em}
.prose strong{font-weight:800}

/* ---------- 跳转链接 ---------- */

.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 18px;
  background:var(--lime);
  color:var(--night-pitch);
  font-size:14px;
  font-weight:800;
  letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- 头部框架 ---------- */

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,26,19,.9);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
}

.header-frame{
  position:relative;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(12px,2vw,36px);
  min-height:var(--header-h);
  padding-inline:var(--frame-x);
  border-bottom:1px solid var(--line);
}

.header-frame::before,
.header-frame::after{
  content:"";
  position:absolute;
  bottom:-1px;
  height:2px;
}

.header-frame::before{left:0;width:clamp(28px,6vw,96px);background:var(--lime)}
.header-frame::after{right:0;width:clamp(14px,3vw,44px);background:var(--line-strong)}

/* 品牌 */

.brand-mark{
  display:flex;
  align-items:center;
  gap:.7rem;
  color:var(--paper);
}

.brand-glyph{
  position:relative;
  display:block;
  width:28px;
  height:28px;
  flex:0 0 auto;
  border:1px solid var(--line-strong);
  background:linear-gradient(135deg,rgba(42,97,80,.7),rgba(10,29,39,.95));
}

.brand-glyph::before{
  content:"";
  position:absolute;
  inset:6px 11px;
  background:var(--lime);
  transform:skewX(-14deg);
}

.brand-text{display:block}

.brand-name{
  display:block;
  font-size:1.02rem;
  font-weight:900;
  letter-spacing:.16em;
  line-height:1;
  transform:skewX(-2deg);
}

.brand-tag{
  display:block;
  margin-top:5px;
  font-size:11px;
  letter-spacing:.24em;
  color:var(--muted);
}

/* 导航 */

.site-nav{
  grid-column:2;
  justify-self:end;
  display:flex;
  align-items:center;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(0px,.8vw,8px);
  counter-reset:navnum;
}

.nav-list li{counter-increment:navnum}

.nav-list a{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:.45em;
  padding:.5em clamp(8px,1vw,13px);
  font-size:.94rem;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--silver);
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}

.nav-list a::before{
  content:counter(navnum,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:0;
  color:var(--mist-blue);
  transition:color .2s var(--ease);
}

.nav-list a:hover{color:var(--paper);background:rgba(13,46,34,.85);border-bottom-color:var(--line-strong)}
.nav-list a:hover::before{color:var(--silver)}

.nav-list a[aria-current="page"]{
  color:var(--lime);
  border-bottom-color:var(--lime);
}

.nav-list a[aria-current="page"]::before{color:var(--lime)}

.nav-foot{
  display:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:var(--muted);
}

/* 动作区 */

.header-actions{
  grid-column:3;
  justify-self:end;
  display:flex;
  align-items:center;
  gap:12px;
}

.header-cta{letter-spacing:.04em}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.6em;
  padding:.55em .8em;
  border:1px solid var(--line-strong);
  color:var(--silver);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.14em;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}

.nav-toggle:hover{color:var(--lime);border-color:var(--lime)}

.nav-toggle-icon{
  display:block;
  width:18px;
  height:12px;
  position:relative;
}

.nav-toggle-icon span{
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:currentColor;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}

.nav-toggle-icon span:first-child{top:0}
.nav-toggle-icon span:last-child{bottom:0}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:first-child{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:last-child{transform:translateY(-5px) rotate(-45deg)}

/* 底部进度线 */

.header-rule{
  position:relative;
  height:2px;
  background:var(--line-soft);
}

.header-progress{
  position:absolute;
  inset:0 auto 0 0;
  display:block;
  width:0;
  background:var(--lime);
  transition:width .12s linear;
}

/* ---------- 右侧边线 ---------- */

.touchline{
  position:fixed;
  right:0;
  top:50%;
  z-index:40;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  width:38px;
  padding:18px 0;
  transform:translateY(-50%);
  pointer-events:none;
  border-left:1px solid var(--line);
  background:linear-gradient(180deg,rgba(6,26,19,0),rgba(13,46,34,.72),rgba(6,26,19,0));
}

.touchline-ticks{
  display:block;
  width:1px;
  height:96px;
  background:repeating-linear-gradient(180deg,var(--lime) 0 6px,transparent 6px 15px);
  opacity:.85;
}

.touchline-label{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.32em;
  color:var(--mist-blue);
}

/* ---------- 页脚 ---------- */

.site-footer{
  position:relative;
  overflow:hidden;
  background:linear-gradient(180deg,#061A13 0%,#08211A 42%,#051510 100%);
  color:var(--silver);
  border-top:1px solid var(--line);
}

.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(to right,var(--line-soft) 1px,transparent 1px);
  background-size:clamp(64px,8vw,124px) 100%;
  opacity:.6;
}

.footer-topline{
  height:3px;
  background:linear-gradient(90deg,var(--lime) 0 clamp(64px,10vw,140px),var(--line-strong) clamp(64px,10vw,140px) 100%);
}

.footer-frame{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);
  gap:clamp(28px,5vw,76px) clamp(24px,4vw,64px);
  max-width:1360px;
  margin-inline:auto;
  padding:clamp(40px,6vw,84px) var(--frame-x) clamp(22px,3vw,36px);
}

.footer-lead{min-width:0}

.footer-brand{
  font-size:clamp(30px,3.6vw,46px);
  font-weight:900;
  line-height:1;
  letter-spacing:-.01em;
  color:var(--paper);
  transform:skewX(-2deg);
}

.footer-brand em{
  display:block;
  margin-top:.7em;
  font-style:normal;
  font-size:.34em;
  font-weight:700;
  letter-spacing:.34em;
  color:var(--lime);
}

.footer-summary{
  max-width:38ch;
  margin-top:18px;
  font-size:.95rem;
  line-height:1.7;
  color:#A7B7BE;
}

.footer-contact{
  display:grid;
  gap:8px;
  margin-top:22px;
  font-size:.92rem;
}

.contact-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}

.contact-value{
  font-family:var(--font-mono);
  font-size:.86rem;
  letter-spacing:.01em;
  color:var(--paper);
  word-break:break-all;
}

.copy-btn{
  padding:.22em .6em;
  border:1px solid var(--line);
  font-family:var(--font-sans);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}

.copy-btn:hover{color:var(--lime);border-color:var(--lime)}

.copy-btn.is-copied{
  color:var(--night-pitch);
  background:var(--lime);
  border-color:var(--lime);
}

.footer-hours{font-size:12.5px;letter-spacing:.06em;color:var(--muted)}

.footer-addr{
  font-size:12.5px;
  line-height:1.6;
  color:#A7B7BE;
  max-width:34ch;
}

.footer-cta{margin-top:24px}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,3vw,40px);
  align-content:start;
}

.footer-col-title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.24em;
  color:var(--silver);
}

.footer-col-title::before{
  content:"";
  width:6px;
  height:6px;
  flex:0 0 auto;
  background:var(--lime);
}

.footer-col ul{display:grid;gap:2px}

.footer-col a{
  display:inline-block;
  padding:.3em 0;
  font-size:.94rem;
  color:var(--silver);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}

.footer-col a:hover{color:var(--lime);border-bottom-color:var(--lime)}

.footer-meta{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  margin-top:clamp(24px,4vw,48px);
  padding-top:18px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--muted);
}

.footer-copy,
.footer-icp,
.footer-note{font-size:12.5px}

.footer-icp{color:var(--silver)}

/* ---------- 响应式 ---------- */

@media (max-width:1180px){
  .touchline{display:none}
}

@media (max-width:1040px){
  .nav-list a{padding-inline:9px;font-size:.9rem}
  .header-cta{display:none}
}

@media (max-width:980px){
  .site-header{position:sticky}

  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:block;
    justify-self:stretch;
    max-height:calc(100vh - var(--header-h) - 4px);
    overflow:auto;
    padding:10px var(--frame-x) 24px;
    background:rgba(6,26,19,.985);
    border-bottom:1px solid var(--line-strong);
    box-shadow:0 24px 48px rgba(0,0,0,.45);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }

  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }

  .nav-list{flex-direction:column;align-items:stretch;gap:0}

  .nav-list a{
    display:flex;
    justify-content:flex-start;
    align-items:center;
    gap:.8em;
    padding:.95em 4px;
    font-size:1.05rem;
    border-bottom:1px solid var(--line-soft);
  }

  .nav-list a::before{font-size:.7rem;min-width:2.2em}

  .nav-list a[aria-current="page"]{border-bottom-color:var(--line-soft);background:rgba(13,46,34,.9);color:var(--lime)}

  .nav-foot{display:block;margin-top:18px;line-height:1.7}

  html[data-nav-open] body{overflow:hidden}
}

@media (max-width:900px){
  .grid--2,
  .grid--3{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:860px){
  .footer-frame{grid-template-columns:minmax(0,1fr)}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-meta{justify-content:flex-start}
}

@media (max-width:560px){
  body{font-size:16px}
  .header-frame{gap:10px}
  .brand-tag{letter-spacing:.16em}
  .brand-glyph{width:24px;height:24px}
  .brand-glyph::before{inset:5px 9px}
  .footer-cols{grid-template-columns:minmax(0,1fr)}
  .footer-brand em{letter-spacing:.24em}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }

  .header-progress{transition:none}
  .site-nav{transition:none}
}