/* ========== 1. Reset ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,dl,dd,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
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%}

/* ========== 2. 变量 ========== */
:root{
  --seed:#1B1B1B;
  --char:#0F0F0F;
  --flesh:#7ED321;
  --glow:#C6FF3D;
  --skin:#9B6A3C;
  --skin-deep:#6E4A28;
  --milk:#F4F7EF;
  --grass:#E4EBDC;
  --paper:#FFFFFF;
  --leaf:#2E7D32;
  --alert:#B23A2E;

  --ink-soft:rgba(27,27,27,.72);
  --line:rgba(27,27,27,.14);
  --line-strong:rgba(27,27,27,.28);

  --font-display:"Helvetica Neue","Arial Black",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Cascadia Mono","Roboto Mono",Menlo,Consolas,"PingFang SC",monospace;

  --radius-peel:28px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --shadow-soft:0 20px 46px -30px rgba(15,15,15,.7);
}

/* ========== 3. 中文排版基础 ========== */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--seed);
  background:var(--milk);
  letter-spacing:.01em;
  word-break:break-word;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.08;
  color:var(--seed);
  text-wrap:balance;
}
h1{font-size:clamp(2.2rem,5.6vw,4rem)}
h2{font-size:clamp(1.5rem,3vw,2.3rem);letter-spacing:-.015em}
h3{font-size:clamp(1.15rem,1.8vw,1.42rem);font-weight:800;letter-spacing:-.01em}
p{text-wrap:pretty}
.mono,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--glow);outline-offset:3px;box-shadow:0 0 0 3px rgba(27,27,27,.35);border-radius:8px}
::selection{background:var(--glow);color:var(--char)}

/* ========== 4. 跳转链接 ========== */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 18px;border-radius:999px;
  background:var(--glow);color:var(--char);
  font-weight:800;font-size:.85rem;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none}

/* ========== 5. 头部：悬浮胶囊浮岛 ========== */
.site-header{
  position:fixed;top:20px;left:0;right:0;z-index:80;
  padding:0 clamp(14px,3vw,40px);
  pointer-events:none;
}
.header-shell{
  position:relative;
  pointer-events:auto;
  width:100%;max-width:1160px;margin:0 auto;
  display:flex;align-items:center;gap:14px;
  padding:9px 10px 9px 16px;
  background:rgba(244,247,239,.93);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:var(--shadow-soft),inset 0 1px 0 rgba(255,255,255,.7);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  transition:padding .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease);
}
.site-header[data-scrolled] .header-shell{
  padding:5px 8px 5px 14px;
  background:rgba(244,247,239,.97);
  box-shadow:0 14px 34px -26px rgba(15,15,15,.85),inset 0 1px 0 rgba(255,255,255,.7);
}

/* 品牌锁定 */
.brand-lockup{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:36px;height:36px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,#EAFBD8 0 16%,var(--flesh) 17% 70%,var(--glow) 71% 84%,var(--skin) 85% 100%);
  box-shadow:inset 0 0 0 1px rgba(27,27,27,.22);
}
.brand-mark::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  background-image:
    radial-gradient(circle at 34% 32%,var(--seed) 0 1.4px,transparent 1.9px),
    radial-gradient(circle at 64% 28%,var(--seed) 0 1.3px,transparent 1.8px),
    radial-gradient(circle at 28% 60%,var(--seed) 0 1.3px,transparent 1.8px),
    radial-gradient(circle at 52% 68%,var(--seed) 0 1.5px,transparent 2px),
    radial-gradient(circle at 72% 56%,var(--seed) 0 1.3px,transparent 1.8px),
    radial-gradient(circle at 46% 46%,var(--seed) 0 1.2px,transparent 1.7px);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{
  font-family:var(--font-display);font-weight:900;font-size:1.02rem;
  letter-spacing:-.02em;color:var(--seed);white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--skin-deep);white-space:nowrap;
}

/* 导航 */
.primary-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{display:flex}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:9px 13px;border-radius:999px;
  font-size:.9rem;font-weight:600;color:var(--ink-soft);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-link::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--seed);opacity:0;transform:scale(.4);
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.nav-link:hover{background:var(--grass);color:var(--seed)}
.nav-link[aria-current="page"]{background:var(--glow);color:var(--char);font-weight:800}
.nav-link[aria-current="page"]::before{opacity:1;transform:none}

/* 按钮基础 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-family:var(--font-body);font-weight:800;font-size:.92rem;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn--primary{background:var(--flesh);color:var(--char)}
.btn--primary:hover{background:var(--glow)}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--seed)}
.btn--ghost:hover{background:var(--grass);border-color:var(--seed)}
.btn--dark{background:var(--seed);color:var(--milk)}
.btn--dark:hover{background:var(--char);color:var(--glow)}
.btn--nav{
  background:var(--seed);color:var(--milk);
  padding:10px 18px;font-size:.85rem;white-space:nowrap;
}
.btn--nav:hover{background:var(--flesh);color:var(--char)}

/* 移动按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;order:2;margin-left:auto;
  padding:9px 14px;border-radius:999px;
  border:1px solid var(--line-strong);background:var(--paper);
  font-size:.8rem;font-weight:800;letter-spacing:.08em;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--seed)}
.nav-toggle[aria-expanded="true"]{background:var(--glow);border-color:var(--glow);color:var(--char)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:15px}
.nav-toggle__bars span{display:block;height:2px;width:100%;border-radius:2px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

/* 滚动进度 */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  background:linear-gradient(90deg,var(--flesh),var(--glow) 60%,var(--flesh));
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
}

/* ========== 6. 页脚：果皮带 + 深黑主体 + 法律条 ========== */
.site-footer{
  position:relative;
  margin-top:clamp(64px,10vw,140px);
  background:var(--seed);color:var(--milk);
}
.footer-peel{
  height:46px;
  background:linear-gradient(100deg,var(--skin) 0 30%,var(--skin-deep) 30% 54%,var(--skin) 54% 100%);
  clip-path:polygon(0 58%,100% 0,100% 100%,0 100%);
}
.footer-shell{
  max-width:1160px;margin:0 auto;
  padding:clamp(34px,5vw,60px) clamp(20px,4vw,44px) clamp(26px,4vw,44px);
  display:grid;
  grid-template-columns:1.5fr .8fr .8fr 1.3fr;
  gap:clamp(24px,3.5vw,46px);
  align-items:start;
}
.footer-brand{display:flex;flex-direction:column;gap:10px;min-width:0}
.footer-brand__link{
  font-family:var(--font-display);font-weight:900;font-size:1.5rem;
  letter-spacing:-.02em;color:var(--milk);
  border-bottom:2px solid transparent;align-self:flex-start;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-brand__link:hover{color:var(--glow);border-color:var(--glow)}
.footer-kicker{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--flesh);
}
.footer-brand__note{font-size:.88rem;line-height:1.7;color:rgba(244,247,239,.66);max-width:26ch}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);font-size:.66rem;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--glow);
  margin-bottom:14px;
}
.footer-list li+li{margin-top:8px}
.footer-link{
  display:inline-block;font-size:.92rem;color:rgba(244,247,239,.82);
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{color:var(--glow);border-color:rgba(198,255,61,.6)}
.footer-contact{display:grid;gap:12px}
.footer-contact__row{display:grid;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;
  text-transform:uppercase;color:rgba(244,247,239,.5);
}
.footer-contact__value{font-size:.9rem;color:rgba(244,247,239,.94);overflow-wrap:anywhere}
.footer-note{
  grid-column:1/-1;margin-top:6px;padding-top:20px;
  border-top:1px solid rgba(244,247,239,.14);
  font-size:.82rem;line-height:1.75;color:rgba(244,247,239,.6);max-width:70ch;
}
.footer-legal{background:var(--skin);color:#FFF;border-top:1px solid var(--skin-deep)}
.footer-legal__inner{
  max-width:1160px;margin:0 auto;
  padding:15px clamp(20px,4vw,44px);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:.76rem;line-height:1.6;
}
.footer-legal__text{flex:1 1 320px;min-width:0;color:rgba(255,255,255,.96)}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal__link{color:#FFF;border-bottom:1px solid rgba(255,255,255,.45);transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer-legal__link:hover{color:var(--glow);border-color:var(--glow)}
.footer-legal__copy{
  margin-left:auto;font-family:var(--font-mono);letter-spacing:.06em;
  color:rgba(255,255,255,.88);font-variant-numeric:tabular-nums;
}

/* ========== 7. 主内容与容器 ========== */
#main-content{
  display:block;
  padding-top:clamp(108px,13vh,144px);
  scroll-margin-top:120px;
  outline:none;
}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 clamp(20px,4vw,44px)}
.container--narrow{max-width:860px}
.container--wide{max-width:1360px}
.band{padding-block:clamp(36px,5vw,72px)}
.band--dark{background:var(--seed);color:var(--milk)}
.band--dark h1,.band--dark h2,.band--dark h3{color:var(--milk)}
.band--flesh{background:var(--flesh);color:var(--char)}
.band--skin{background:var(--skin);color:#FFF}
.band--skin h2,.band--skin h3{color:#FFF}
.band--grass{background:var(--grass)}

/* 网格助手 */
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(14px,2vw,26px)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}

/* ========== 8. 通用小件 ========== */
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:.66rem;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--skin-deep);
}
.kicker::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--flesh);box-shadow:0 0 0 3px rgba(126,211,33,.22);
}
.prose{max-width:38em}
.prose p+p{margin-top:1em}
.prose a{color:var(--leaf);border-bottom:1px solid rgba(46,125,50,.35)}
.prose a:hover{border-color:var(--leaf)}
.prose ul{margin-top:.8em;display:grid;gap:.4em}
.prose li{padding-left:1.1em;position:relative}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--flesh)}
.prose strong{font-weight:800}

.breadcrumb{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__link{color:var(--leaf);border-bottom:1px solid rgba(46,125,50,.35)}
.breadcrumb__link:hover{border-color:var(--leaf)}
.breadcrumb__sep{color:rgba(110,74,40,.5)}
.breadcrumb__current{color:var(--seed);font-weight:700}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;
  background:var(--grass);color:var(--skin-deep);
  font-family:var(--font-mono);font-size:.64rem;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
}
.tag--glow{background:var(--glow);color:var(--char)}
.tag--flesh{background:var(--flesh);color:var(--char)}

/* 图片容器基础规则（页面阶段放占位图） */
.media-frame{
  position:relative;isolation:isolate;overflow:hidden;
  aspect-ratio:16/10;width:100%;
  border-radius:var(--radius-peel) var(--radius-peel) var(--radius-peel) 6px;
  background:linear-gradient(135deg,var(--grass) 0 40%,#D6E6C2 40% 72%,var(--flesh) 72% 100%);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(27,27,27,.16) 1px,transparent 1.2px);
  background-size:12px 12px;opacity:.45;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:4/5}
.media-frame__caption{
  position:absolute;left:14px;bottom:14px;z-index:2;
  padding:5px 12px;border-radius:999px;
  background:rgba(15,15,15,.82);color:var(--milk);
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;
}

/* 主题筛选（仅筛选当前页已有内容） */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-btn{
  padding:8px 16px;border-radius:999px;
  border:1px solid var(--line-strong);background:var(--paper);color:var(--seed);
  font-family:var(--font-mono);font-size:.68rem;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.filter-btn:hover{border-color:var(--seed)}
.filter-btn[aria-pressed="true"],.filter-btn.is-active{background:var(--glow);border-color:var(--glow);color:var(--char)}
.filter-status{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;color:var(--skin-deep);font-variant-numeric:tabular-nums}

/* 渐入与筛选状态 */
.reveal-ready [data-reveal]{
  opacity:0;transform:translate3d(0,16px,0);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.reveal-ready [data-reveal].is-visible{opacity:1;transform:none}
.is-hidden{display:none!important}

/* ========== 9. 响应式 ========== */
@media (max-width:1080px){
  .brand-sub{display:none}
}
@media (max-width:960px){
  .site-header{top:14px}
  .header-shell{padding:8px 8px 8px 14px;gap:10px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;left:0;right:0;top:calc(100% + 12px);
    flex-direction:column;align-items:stretch;gap:6px;margin-left:0;
    padding:14px;
    background:rgba(244,247,239,.98);
    border:1px solid var(--line);border-radius:26px;
    box-shadow:0 30px 60px -34px rgba(15,15,15,.85);
    transform-origin:top center;
    transform:scaleY(.72) translateY(-10px);
    opacity:0;visibility:hidden;pointer-events:none;
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    transition:transform .24s var(--ease),opacity .18s ease,visibility .24s var(--ease);
  }
  .primary-nav[data-open]{
    transform:none;opacity:1;visibility:visible;pointer-events:auto;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:12px 14px;border-radius:16px;font-size:.98rem;justify-content:flex-start}
  .nav-item,.primary-nav .btn--nav{
    opacity:0;transform:translateY(-6px);
    transition:opacity .18s var(--ease),transform .18s var(--ease);
  }
  .primary-nav[data-open] .nav-item,
  .primary-nav[data-open] .btn--nav{opacity:1;transform:none}
  .primary-nav[data-open] .nav-item:nth-child(1){transition-delay:.04s}
  .primary-nav[data-open] .nav-item:nth-child(2){transition-delay:.08s}
  .primary-nav[data-open] .nav-item:nth-child(3){transition-delay:.12s}
  .primary-nav[data-open] .nav-item:nth-child(4){transition-delay:.16s}
  .primary-nav[data-open] .nav-item:nth-child(5){transition-delay:.20s}
  .primary-nav[data-open] .nav-item:nth-child(6){transition-delay:.24s}
  .primary-nav[data-open] .btn--nav{transition-delay:.28s;margin-top:8px;width:100%;padding:13px 18px;border-radius:16px}
  body.nav-open{overflow:hidden}
  .footer-shell{grid-template-columns:1fr 1fr}
  .footer-note{grid-column:1/-1}
}
@media (max-width:860px){
  .grid-12>[class*="col-"]{grid-column:1/-1}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8{grid-column:1/-1}
}
@media (max-width:640px){
  .site-header{top:10px;padding:0 10px}
  .brand-mark{width:32px;height:32px}
  .brand-name{font-size:.95rem}
  .nav-toggle__label{display:none}
  .footer-shell{grid-template-columns:1fr;gap:26px}
  .footer-legal__copy{margin-left:0}
}

/* ========== 10. 动效偏好 ========== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .reveal-ready [data-reveal]{opacity:1!important;transform:none!important}
  .primary-nav,.primary-nav[data-open]{transform:none}
}