:root{
  --sand:#f2e9d9;
  --sand-deep:#e3d6bd;
  --linen:#ece1cd;
  --paper:#faf4e8;
  --clay:#c67b5c;
  --lake:#5cc6b0;
  --lake-deep:#2f8e7c;
  --ink:#172623;
  --olive:#6b7b3c;
  --line:rgba(23,38,35,.18);
  --shadow:0 22px 44px -26px rgba(23,38,35,.5);
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

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

body{
  margin:0;
  font-family:'Didact Gothic','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:17px;
  line-height:1.72;
  color:var(--ink);
  background:
    radial-gradient(circle at 10% 4%, #f8f1e4 0%, rgba(248,241,228,0) 44%),
    radial-gradient(circle at 90% 2%, rgba(92,198,176,.24) 0%, rgba(92,198,176,0) 38%),
    linear-gradient(180deg, var(--sand) 0%, var(--sand-deep) 64%, #dbcbb0 100%);
  padding:0 0 136px;
  overflow-x:hidden;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:6;
  pointer-events:none;
  opacity:.07;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1,h2,h3,h4{
  font-family:'Poiret One','Didact Gothic','Noto Sans SC',system-ui,sans-serif;
  font-weight:400;
  line-height:1.2;
  letter-spacing:.02em;
  margin:0 0 .55em;
  overflow-wrap:break-word;
}

p{margin:0 0 1em;}
img{max-width:100%;display:block;}
a{color:var(--lake-deep);}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:3px solid var(--lake-deep);
  outline-offset:3px;
}

/* 角落品牌图钉 */
.mark{
  position:fixed;
  top:16px;
  left:16px;
  z-index:45;
  width:52px;
  height:52px;
  display:grid;
  place-items:center;
  color:var(--ink);
  background:var(--lake);
  border:2px solid var(--ink);
  border-radius:58% 42% 48% 52% / 46% 52% 48% 54%;
  box-shadow:0 12px 22px -14px rgba(23,38,35,.85);
  transition:transform .4s var(--ease);
}
.mark:hover{transform:translateY(-2px) rotate(-5deg);}
.mark svg{width:24px;height:24px;}
.mark-img{width:34px;height:34px;object-fit:contain;border-radius:10px;}

/* 主栅格：aside 在内容左侧 */
.shell{
  max-width:1180px;
  margin:0 auto;
  padding:88px 22px 0;
  display:grid;
  grid-template-columns:246px minmax(0,1fr);
  gap:clamp(22px,4vw,54px);
  align-items:start;
}

.rail{
  position:sticky;
  top:88px;
  padding:20px 16px 16px;
  background:linear-gradient(180deg, rgba(236,225,205,.96), rgba(250,244,232,.9));
  border:1px solid var(--line);
  border-radius:18px 44px 18px 18px;
  box-shadow:var(--shadow);
}
.rail-title{
  font-size:16px;
  letter-spacing:.18em;
  margin:0 0 14px;
  padding-left:4px;
}
.rail-nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:4px;
}
.rail-nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 13px;
  border-radius:999px;
  border:1px solid transparent;
  color:var(--ink);
  text-decoration:none;
  font-size:16px;
  transition:background .28s var(--ease),border-color .28s var(--ease),transform .28s var(--ease);
}
.rail-nav a:hover{
  background:rgba(92,198,176,.5);
  border-color:var(--line);
  transform:translateX(3px);
}
.rail-nav a[aria-current="true"]{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--sand);
}
.rail-top{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  margin-top:14px;
  padding:6px 13px;
  font-size:16px;
  color:var(--olive);
  text-decoration:none;
  border-top:1px solid var(--line);
  width:100%;
}
.rail-top:hover{color:var(--ink);}

/* 标题装饰 */
.deco{
  position:relative;
  display:inline-block;
}
.deco::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-5px;
  height:2px;
  background:linear-gradient(90deg,var(--lake),var(--clay) 60%,rgba(198,123,92,0));
}

/* Hero：左图右文，压一条斜切色带 */
.hero{
  position:relative;
  z-index:0;
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:clamp(24px,4vw,54px);
  align-items:center;
  min-height:calc(100svh - 210px);
  padding:18px 0 clamp(40px,6vw,66px);
}
.hero::after{
  content:"";
  position:absolute;
  left:-24px;
  right:-24px;
  bottom:0;
  height:13px;
  background:linear-gradient(90deg,var(--lake),var(--clay));
  clip-path:polygon(0 72%,100% 0,100% 100%,0 100%);
  opacity:.85;
  z-index:-1;
}
.hero-media{
  position:relative;
  z-index:0;
}
.hero-media::before{
  content:"";
  position:absolute;
  inset:18px -14px -16px 20px;
  border-radius:130px 20px 130px 20px;
  background:rgba(92,198,176,.55);
  z-index:-1;
}
.hero-media::after{
  content:"";
  position:absolute;
  inset:-14px 20px 20px -16px;
  border:1px solid var(--ink);
  border-radius:134px 22px 134px 22px;
  z-index:-1;
  opacity:.5;
}
.hero-frame{
  overflow:hidden;
  border:2px solid var(--ink);
  border-radius:130px 18px 130px 18px;
  box-shadow:var(--shadow);
  background:var(--linen);
}
.hero-frame img{
  width:100%;
  height:clamp(280px,56vh,540px);
  object-fit:cover;
}
.hero-frame--blank{
  min-height:clamp(240px,44vh,420px);
  background:
    repeating-linear-gradient(135deg, rgba(23,38,35,.06) 0 12px, rgba(212,196,168,.35) 12px 24px),
    linear-gradient(160deg,var(--linen),var(--sand));
}
.hero-copy{
  max-width:44ch;
  margin-inline:auto;
  text-align:center;
}
.hero-copy::before{
  content:"";
  display:block;
  width:92px;
  height:6px;
  margin:0 auto 26px;
  border-top:1px solid var(--clay);
  border-bottom:1px solid var(--clay);
}
.hero-copy h1{
  font-size:clamp(2.1rem,4.4vw,3.4rem);
  letter-spacing:.05em;
  margin-bottom:.4em;
}
.hero-lede{
  font-size:1.0625rem;
  color:rgba(23,38,35,.82);
  line-height:1.75;
}
.hero-cta{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  margin-top:18px;
  padding:12px 28px;
  border-radius:999px;
  background:var(--ink);
  border:1px solid var(--ink);
  color:var(--sand);
  text-decoration:none;
  font-size:17px;
  letter-spacing:.08em;
  transition:background .3s var(--ease),color .3s var(--ease),transform .3s var(--ease);
}
.hero-cta:hover{
  background:var(--lake);
  color:var(--ink);
  transform:translateY(-3px);
}

/* 正文区块 */
.main{min-width:0;}
.article{min-width:0;}
.article > section:not(.hero){
  position:relative;
  margin-block:clamp(22px,3.4vw,38px);
  padding:clamp(26px,4vw,48px);
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:18px 18px 18px 46px;
  box-shadow:var(--shadow);
  scroll-margin-top:110px;
}
.article > section:not(.hero)::before{
  content:"";
  position:absolute;
  top:0;
  left:clamp(26px,4vw,48px);
  width:64px;
  height:4px;
  background:var(--clay);
  border-radius:0 0 4px 4px;
}
.article section p,
.article section li{
  font-size:1.0625rem;
  line-height:1.78;
}
.article section ul,
.article section ol{
  padding-left:1.35em;
  margin:0 0 1.1em;
}
.article section li{margin:.4em 0;}
.article section li::marker{color:var(--clay);}
.article section blockquote{
  margin:1.4em 0;
  padding:14px 22px;
  border-left:4px solid var(--lake);
  background:rgba(92,198,176,.14);
  border-radius:0 16px 16px 0;
}
.article section img{
  height:auto;
  border-radius:16px;
  margin:1.2em 0;
  box-shadow:0 16px 32px -24px rgba(23,38,35,.7);
}
.article section h2{
  font-size:clamp(1.45rem,2.5vw,2rem);
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:.5em;
}
.article section h2::before{
  content:"";
  flex:0 0 26px;
  height:1px;
  background:var(--clay);
  transform:translateY(-.45em);
}
.article section h3{
  font-size:clamp(1.2rem,2vw,1.5rem);
  color:#123;
}
.article section strong{color:#0f1f1c;}
.article section code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.95em;
  background:rgba(23,38,35,.07);
  padding:.1em .4em;
  border-radius:6px;
}

/* 页脚：品牌 + 表单 + 三列 dl + 版权 */
.foot{
  margin:clamp(44px,6vw,84px) auto 0;
  max-width:1180px;
  padding:clamp(30px,4vw,52px) 22px 26px;
  background:linear-gradient(180deg, rgba(236,225,205,.95), rgba(250,244,232,.95));
  border-top:2px solid var(--ink);
  border-radius:36px 36px 0 0;
}
.foot-top{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:clamp(24px,4vw,52px);
  align-items:start;
}
.foot-title{
  font-size:clamp(1.35rem,2.4vw,1.9rem);
  margin-bottom:.5em;
}
.foot-desc{
  color:rgba(23,38,35,.78);
  max-width:46ch;
}
.foot-form{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:flex-end;
}
.field{
  display:flex;
  flex-direction:column;
  gap:6px;
  flex:1 1 190px;
  min-width:0;
}
.field span{
  font-size:16px;
  letter-spacing:.1em;
  color:var(--olive);
}
.field input{
  min-height:46px;
  padding:10px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--paper);
  font:inherit;
  font-size:16px;
  color:var(--ink);
  width:100%;
}
.foot-form button{
  min-height:46px;
  padding:10px 26px;
  border-radius:999px;
  border:1px solid var(--ink);
  background:var(--clay);
  color:var(--ink);
  font:inherit;
  font-size:16px;
  cursor:pointer;
  transition:background .3s var(--ease),transform .3s var(--ease);
}
.foot-form button:hover{background:var(--lake);transform:translateY(-2px);}
.foot-cols{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:clamp(12px,3vw,32px);
  margin-top:clamp(28px,4vw,44px);
  padding-top:clamp(22px,3vw,30px);
  border-top:1px solid var(--line);
}
.foot-cols dl{margin:0;}
.foot-cols dt{
  font-family:'Poiret One','Didact Gothic',sans-serif;
  font-size:16px;
  letter-spacing:.16em;
  color:var(--olive);
  margin-bottom:6px;
}
.foot-cols dd{margin:0;}
.foot-cols a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:16px;
  color:var(--ink);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.foot-cols a:hover{
  color:var(--lake-deep);
  border-bottom-color:var(--lake-deep);
}
.copy{
  margin:clamp(22px,3vw,32px) 0 0;
  padding-top:16px;
  border-top:1px solid var(--line);
  text-align:center;
  font-size:16px;
  color:rgba(23,38,35,.7);
}

/* 底部固定胶囊导航 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:50;
  display:flex;
  justify-content:center;
  padding:10px 12px calc(10px + env(safe-area-inset-bottom));
  pointer-events:none;
}
.dock-inner{
  pointer-events:auto;
  display:flex;
  align-items:center;
  gap:5px;
  max-width:min(100%,900px);
  padding:7px;
  background:var(--ink);
  border:1px solid rgba(212,196,168,.32);
  border-radius:999px;
  box-shadow:0 26px 46px -24px rgba(0,0,0,.7);
}
.dock-nav{
  display:flex;
  gap:4px;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
  overscroll-behavior-x:contain;
}
.dock-nav::-webkit-scrollbar{display:none;}
.dock-nav a,
.dock-cta{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:9px 15px;
  border-radius:999px;
  font-size:16px;
  white-space:nowrap;
  text-decoration:none;
  color:var(--sand);
  transition:background .28s var(--ease),color .28s var(--ease);
}
.dock-nav a:hover{background:rgba(212,196,168,.18);}
.dock-nav a[aria-current="true"]{
  background:rgba(92,198,176,.9);
  color:var(--ink);
}
.dock-cta{
  flex:0 0 auto;
  background:var(--lake);
  color:var(--ink);
  border:1px solid var(--lake);
}
.dock-cta:hover{background:var(--sand);border-color:var(--sand);}

/* 回到顶部浮标 */
.jump{
  position:fixed;
  right:14px;
  bottom:96px;
  z-index:48;
  width:48px;
  height:48px;
  display:grid;
  place-items:center;
  background:var(--paper);
  color:var(--ink);
  border:1px solid var(--line);
  border-radius:54% 46% 50% 50% / 48% 50% 50% 52%;
  box-shadow:var(--shadow);
  transition:transform .3s var(--ease),background .3s var(--ease);
}
.jump:hover{background:var(--lake);transform:translateY(-3px);}
.jump svg{width:22px;height:22px;}

/* 进场 */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
.reveal.in{opacity:1;transform:none;}

@media (max-width:900px){
  .shell{
    grid-template-columns:minmax(0,1fr);
    padding:84px 16px 0;
    gap:20px;
  }
  .rail{
    position:static;
    padding:16px 14px;
    border-radius:16px 36px 16px 16px;
  }
  .rail-nav ul{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .rail-top{width:auto;border-top:0;margin-top:8px;}
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:0;
    padding:4px 0 34px;
    gap:22px;
  }
  .hero-copy{
    order:1;
    text-align:left;
    margin-inline:0;
    max-width:none;
  }
  .hero-copy::before{margin:0 0 20px;}
  .hero-media{order:2;}
  .hero-media::before{inset:12px -10px -12px 14px;}
  .hero-media::after{inset:-10px 14px 14px -12px;}
  .hero-frame img{height:min(34vh,250px);}
  .hero-frame--blank{min-height:150px;}
  .hero::after{left:-16px;right:-16px;}
  .article > section:not(.hero){padding:22px 18px;border-radius:16px 16px 16px 34px;}
  .article section h2::before{display:none;}
  .foot{margin-top:40px;padding:28px 18px 22px;border-radius:26px 26px 0 0;}
  .foot-top{grid-template-columns:minmax(0,1fr);}
  .jump{bottom:100px;right:10px;width:44px;height:44px;}
}

@media (max-width:420px){
  body{font-size:16px;}
  .dock-inner{padding:6px;}
  .dock-nav a,.dock-cta{padding:8px 12px;font-size:16px;}
  .foot-cols{gap:10px;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    transition-duration:.001ms !important;
    animation-duration:.001ms !important;
  }
  .reveal{opacity:1 !important;transform:none !important;}
}

button[aria-expanded]{min-width:44px;min-height:44px}