@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=Righteous&display=swap');

:root{
  --ink:#26171a;
  --ink-soft:#3a252b;
  --pink:#eb879c;
  --pink-soft:#ffb6c1;
  --pink-wash:#ffe9ee;
  --cream:#fff5f7;
  --paper:#fffdfd;
  --line:#f2d3da;
  --line-strong:#e3b3bd;
  --muted:#6a5057;
  --link:#a63b52;
  --r:10px;
  --shadow:0 2px 4px rgba(38,23,26,.05), 0 10px 28px rgba(38,23,26,.07);
  --pad:clamp(16px,4vw,38px);
  --maxw:1160px;
}

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

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

body{
  margin:0;
  font-family:Poppins,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.7;
  color:var(--ink);
  background:
    radial-gradient(880px 480px at 92% -8%, #ffe4ea 0%, rgba(255,228,234,0) 70%),
    radial-gradient(660px 420px at -4% 18%, #fff0f4 0%, rgba(255,240,244,0) 66%),
    var(--cream);
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block}

h1,h2,h3,.mark-glyph{
  font-family:Righteous,Poppins,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-weight:400;
  letter-spacing:.005em;
}

a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}

:focus-visible{
  outline:3px solid #a63b52;
  outline-offset:2px;
  border-radius:8px;
}

[id]{scroll-margin-top:230px}

/* ---------- 头部 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(255,245,247,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.topline{
  margin:0;
  padding:7px 14px;
  text-align:center;
  font-size:15px;
  letter-spacing:.04em;
  color:#7d2f42;
  background:linear-gradient(90deg,#ffe4ea,#ffd3de 60%,#ffe4ea);
  border-bottom:1px solid var(--line);
}

.head-row{
  display:flex;
  align-items:center;
  gap:12px;
  max-width:var(--maxw);
  margin:0 auto;
  padding:9px var(--pad);
}

.mark{
  order:2;
  flex:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:12px;
  background:var(--paper);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.mark:hover{text-decoration:none;background:#fff;border-color:var(--pink)}
.mark-img{width:100%;height:100%;object-fit:cover;border-radius:11px}
.mark-glyph{font-size:20px;line-height:1;color:#9a3a4f}

.nav{flex:1 1 auto;min-width:0}
.nav p{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  margin:0;
  padding:0;
}
.nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 9px;
  font-size:16px;
  color:var(--ink);
  border-radius:999px;
  border:1px solid transparent;
}
.nav a:hover{
  text-decoration:none;
  background:var(--pink-wash);
  border-color:var(--line);
}
.ni{
  width:9px;
  height:9px;
  margin-right:7px;
  border-radius:3px;
  background:var(--pink-soft);
  border:1px solid var(--pink);
  transform:rotate(45deg);
  flex:0 0 auto;
}

/* ---------- 主视觉 ---------- */
main{display:block}

.hero{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(22px,5vw,52px) var(--pad) clamp(18px,4vw,36px);
  min-height:100vh;
  display:grid;
  gap:clamp(18px,3vw,30px);
  align-content:start;
  text-align:right;
}

.kicker{
  display:inline-block;
  margin:0;
  padding:6px 14px;
  font-size:15px;
  letter-spacing:.14em;
  color:#8f3448;
  background:var(--pink-wash);
  border:1px solid var(--line-strong);
  border-radius:999px;
}

.hero h1{
  margin:14px 0 0;
  font-size:clamp(30px,6.2vw,56px);
  line-height:1.16;
  color:var(--ink);
}

.lead{
  margin:14px 0 0 auto;
  max-width:46ch;
  font-size:clamp(16px,2.1vw,19px);
  color:var(--ink-soft);
}

.hero-cta{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:10px;
  margin:20px 0 0;
}

.btn{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 22px;
  border-radius:999px;
  background:var(--ink);
  color:#fff;
  font-weight:600;
  font-size:17px;
  border:1px solid var(--ink);
  box-shadow:var(--shadow);
  transition:transform .24s ease, background .24s ease;
}
.btn:hover{text-decoration:none;background:#3d2329;transform:translateY(-2px)}
.btn.ghost{
  background:var(--paper);
  color:var(--ink);
  border-color:var(--line-strong);
}
.btn.ghost:hover{background:#fff;border-color:var(--pink)}

.hero-media{margin:0}
.hero-media .hero-img{
  width:100%;
  height:clamp(190px,36vw,400px);
  object-fit:cover;
  border-radius:16px;
  border:3px solid #fff;
  box-shadow:var(--shadow);
}

/* ---------- 侧栏 + 正文 ---------- */
.stage{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(16px,4vw,34px) var(--pad) clamp(28px,5vw,56px);
  display:grid;
  gap:clamp(18px,3vw,32px);
}

@media (min-width:900px){
  .stage{grid-template-columns:272px minmax(0,1fr);align-items:start}
}

.side{
  padding:18px;
  background:var(--paper);
  border:1px solid var(--line-strong);
  border-radius:var(--r);
}

@media (min-width:900px){
  .side{position:sticky;top:150px}
}

.side h2{
  margin:0;
  font-size:21px;
  line-height:1.3;
}

.subtitle{
  margin:8px 0 0;
  font-size:15.5px;
  color:var(--muted);
}

.side-list{
  list-style:none;
  margin:14px 0 0;
  padding:0;
  border-top:1px solid var(--line);
}
.side-list li{border-bottom:1px solid var(--line)}
.side-list a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:4px 2px;
  font-size:16px;
  color:var(--ink);
}
.side-list a:hover{text-decoration:none;color:#8f3448}
.idx{
  font-family:Poppins,system-ui,sans-serif;
  font-size:13px;
  letter-spacing:.08em;
  color:#b06174;
  flex:0 0 auto;
}
.side-name{border-bottom:1px solid transparent}
.side-list a:hover .side-name{border-bottom-color:var(--pink)}

.side-note{
  margin:14px 0 0;
  font-size:15px;
  color:var(--muted);
}

.body-col{min-width:0}
.body-col > article{
  padding:26px 0 10px;
  border-top:1px solid var(--line);
}
.body-col > article:first-child{border-top:0;padding-top:0}

.body-col h2{
  margin:0 0 12px;
  font-size:clamp(23px,3.4vw,31px);
  line-height:1.28;
}
.body-col h3{
  margin:24px 0 8px;
  font-size:19px;
  line-height:1.4;
}
.body-col p{margin:0 0 14px;color:var(--ink-soft)}
.body-col ul,.body-col ol{margin:0 0 16px;padding-left:1.35em}
.body-col li{margin:7px 0;color:var(--ink-soft)}
.body-col blockquote{
  margin:0 0 16px;
  padding:12px 16px;
  background:#fff7f9;
  border-left:4px solid var(--pink);
  border-radius:0 10px 10px 0;
  color:var(--ink);
}
.body-col strong{color:var(--ink)}
.body-col a{text-decoration:underline;text-underline-offset:3px}
.body-col img{border-radius:10px;border:1px solid var(--line);margin:0 0 16px}
.body-col table{
  width:100%;
  border-collapse:collapse;
  font-size:16px;
  margin:0 0 18px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  overflow:hidden;
}
.body-col th,.body-col td{
  padding:9px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.body-col th{background:#ffeef2;color:var(--ink)}

/* ---------- 结尾 ---------- */
.outro{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(24px,4vw,40px) var(--pad) clamp(30px,5vw,50px);
}
.outro h2{
  margin:0;
  font-size:clamp(22px,3.2vw,29px);
}
.outro-steps{
  margin:18px 0 0;
  padding-left:1.3em;
  color:var(--ink-soft);
}
.outro-steps li{margin:10px 0}
.outro-back{margin:18px 0 0;font-size:16px}
.outro-back a{font-weight:600}

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--paper);
  border-top:1px solid var(--line);
  padding:clamp(26px,5vw,50px) max(var(--pad), calc((100% - 1160px) / 2)) 16px;
  display:grid;
  gap:26px;
}

@media (min-width:840px){
  .site-foot{grid-template-columns:1.5fr 1fr}
  .foot-form,.foot-base{grid-column:1 / -1}
}

.site-foot article{min-width:0}
.site-foot h2{
  margin:0;
  font-size:20px;
  line-height:1.3;
}
.foot-desc{margin:10px 0 0;color:var(--ink-soft);max-width:44ch}
.foot-tag{margin:8px 0 0;font-size:15px;color:var(--muted)}

.foot-link-row{
  display:flex;
  flex-wrap:wrap;
  gap:2px 6px;
  margin:10px 0 0;
}
.foot-link-row a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 10px;
  font-size:16px;
  color:var(--ink);
  border:1px solid var(--line);
  border-radius:999px;
}
.foot-link-row a:hover{text-decoration:none;background:var(--pink-wash);border-color:var(--line-strong)}

.sub-form{margin:12px 0 0}
.sub-form label{
  display:block;
  font-size:16px;
  color:var(--muted);
  margin-bottom:6px;
}
.sub-line{display:flex;flex-wrap:wrap;gap:8px}
.sub-line input{
  flex:1 1 200px;
  min-height:46px;
  padding:0 14px;
  font-size:16px;
  font-family:inherit;
  color:var(--ink);
  background:#fff;
  border:1px solid var(--line-strong);
  border-radius:var(--r);
}
.sub-line input::placeholder{color:#a98e95}
.sub-line button{
  min-height:46px;
  padding:0 22px;
  font-size:17px;
  font-family:inherit;
  font-weight:600;
  color:#fff;
  background:var(--ink);
  border:1px solid var(--ink);
  border-radius:var(--r);
  cursor:pointer;
  transition:background .24s ease;
}
.sub-line button:hover{background:#3d2329}

.foot-base{
  border-top:1px dashed var(--line-strong);
  padding-top:14px;
  text-align:center;
}
.foot-base p{margin:0}
.copy{font-size:15.5px;color:var(--ink-soft)}
.note{font-size:15px;color:var(--muted);margin-top:4px}

/* ---------- 滚动出现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .28s ease, transform .28s ease;
}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .btn{transition:none}
  .btn:hover{transform:none}
}

/* ---------- 小屏微调 ---------- */
@media (max-width:600px){
  [id]{scroll-margin-top:250px}
  .topline{font-size:14px}
  .nav a{padding:0 7px;font-size:15.5px}
  .hero{text-align:right}
  .hero-cta{justify-content:flex-start}
  .lead{margin-left:0}
  .btn{min-height:44px;padding:0 18px;font-size:16px}
  .body-col > article{padding-top:22px}
}

@media (max-width:359px){
  .nav a{font-size:15px}
}

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