@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;500;600;700&family=Libre+Baskerville:wght@400;700&display=swap');

:root{
  --mint:#b4fde1;
  --sky:#add8e6;
  --ink:#172620;
  --ink-2:#41574b;
  --green:#1f6a52;
  --line:rgba(23,38,32,.18);
  --clay:6px 10px 22px rgba(23,38,32,.14);
  --font-display:"Cormorant Garamond","Libre Baskerville","Songti SC","Noto Serif SC",serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.78;
  color:var(--ink);
  background:
    radial-gradient(circle at 10% -4%, #d9fdf1 0, rgba(217,253,241,0) 42%),
    radial-gradient(circle at 92% 4%, #dbeef8 0, rgba(219,238,248,0) 38%),
    linear-gradient(172deg,#f7fefb 0%,#eff8fc 58%,#f5fdf9 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--green);text-underline-offset:4px}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--green);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.wrap{max-width:1160px;margin:0 auto;padding:0 clamp(14px,3.4vw,30px)}

/* 顶部 */
.topbar{
  position:sticky;top:0;z-index:60;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  padding:10px clamp(12px,3vw,26px);
  background:linear-gradient(180deg,rgba(255,255,255,.94),rgba(240,253,247,.84));
  backdrop-filter:blur(10px);
  border-bottom:3px solid rgba(23,38,32,.7);
}
.mark{
  flex:0 0 auto;display:grid;place-items:center;
  width:48px;height:48px;border-radius:16px;
  border:3px solid var(--ink);
  background:linear-gradient(180deg,#fff,var(--mint));
  box-shadow:0 4px 0 rgba(23,38,32,.8), inset 0 3px 0 #fff;
  text-decoration:none;color:var(--ink);
  font-family:var(--font-display);font-size:1.4rem;font-weight:700;
  transition:transform .2s cubic-bezier(.34,1.56,.64,1);
}
.mark:active{transform:translateY(3px)}
.mark img{width:100%;height:100%;object-fit:cover;border-radius:12px}

.nav{flex:1 1 320px;min-width:0}
.nav-row{display:flex;flex-wrap:wrap;gap:2px;margin:0;justify-content:flex-end}
.nav-row a{
  position:relative;
  display:inline-flex;align-items:center;min-height:44px;
  padding:6px 12px;border-radius:14px;
  border:3px solid transparent;
  text-decoration:none;color:var(--ink);font-size:.95rem;
  transition:background .2s ease-out, border-color .2s ease-out, transform .2s ease-out;
}
.nav-row a:hover,.nav-row a:focus-visible{
  background:#fff;border-color:var(--line);
  box-shadow:inset 0 2px 0 #fff, 0 4px 10px rgba(23,38,32,.1);
  transform:translateY(-1px);
}
.panel{
  position:absolute;top:calc(100% + 12px);right:0;
  display:none;flex-direction:column;gap:4px;
  min-width:150px;padding:12px 14px;
  background:#fff;border:3px solid var(--ink);border-radius:18px;
  box-shadow:var(--clay), inset 0 3px 0 #fff;
  font-size:.9rem;
}
.panel i{font-style:normal;color:var(--ink-2)}
.nav-row a.has-panel::after{content:"";width:7px;height:7px;margin-left:8px;border-right:2px solid var(--green);border-bottom:2px solid var(--green);transform:rotate(45deg) translateY(-2px)}
.nav-row a.has-panel:hover .panel,.nav-row a.has-panel:focus-visible .panel{display:flex}

.search{display:flex;align-items:center;gap:6px;flex:0 0 auto}
.search input{
  width:clamp(88px,14vw,148px);min-height:44px;
  padding:6px 12px;font:inherit;font-size:.9rem;color:var(--ink);
  border:3px solid var(--line);border-radius:16px;
  background:#fff;
  box-shadow:inset 0 3px 6px rgba(23,38,32,.1);
}
.search input::placeholder{color:#7d9187}
.search button{
  min-height:44px;min-width:44px;padding:0 12px;
  font:inherit;font-size:.9rem;font-weight:700;color:var(--ink);
  border:3px solid var(--ink);border-radius:16px;
  background:linear-gradient(180deg,#fff,var(--sky));
  box-shadow:0 4px 0 rgba(23,38,32,.8), inset 0 3px 0 #fff;
  cursor:pointer;
  transition:transform .2s ease-out, box-shadow .2s ease-out;
}
.search button:active{transform:translateY(4px);box-shadow:0 0 0 rgba(23,38,32,.8), inset 0 3px 0 #fff}

/* 首屏 */
.hero{
  position:relative;z-index:0;
  display:grid;grid-template-columns:1fr;gap:24px;align-content:center;
  min-height:calc(100svh - 76px);
  padding:clamp(26px,5vw,60px) 0 clamp(30px,5vw,56px);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;border-radius:36px;
  background-image:radial-gradient(rgba(23,38,32,.16) 1.6px, rgba(0,0,0,0) 1.7px);
  background-size:22px 22px;
  border:3px dashed var(--line);
  mask-image:linear-gradient(180deg,transparent,#000 12%,#000 84%,transparent);
}
.hero-txt{text-align:right;padding:0 clamp(10px,3vw,26px)}
.hero h1{
  margin:.2rem 0 .7rem;
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(2.1rem,6.4vw,4.3rem);line-height:1.12;letter-spacing:.01em;
}
.hero p{
  margin:0 0 1.5rem auto;max-width:34ch;
  color:var(--ink-2);font-size:1.02rem;
}
.hero-fig{
  margin:0;order:-1;overflow:hidden;
  border:4px solid rgba(23,38,32,.9);border-radius:28px;
  background:linear-gradient(180deg,#e9fff7,#d3ecf7);
  box-shadow:inset -4px -4px 12px rgba(23,38,32,.14), inset 4px 4px 12px #fff, 10px 14px 26px rgba(23,38,32,.16);
  transform:translate3d(0,var(--py,0px),0);
  will-change:transform;
}
.hero-fig img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-blob{aspect-ratio:16/11;background:linear-gradient(150deg,var(--mint),var(--sky))}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:50px;padding:10px 26px;
  border:3px solid var(--ink);border-radius:22px;
  background:linear-gradient(180deg,#e8fff7,var(--mint));
  color:var(--ink);font-weight:700;font-size:1rem;text-decoration:none;
  box-shadow:0 5px 0 rgba(23,38,32,.85), 0 12px 20px rgba(23,38,32,.16), inset 0 3px 0 #fff;
  transition:transform .2s ease-out, box-shadow .2s ease-out;
}
.btn:active{transform:translateY(5px);box-shadow:0 0 0 rgba(23,38,32,.85), inset 0 3px 0 #fff}

/* 正文 */
.page-body{
  display:grid;grid-template-columns:minmax(0,1fr);gap:28px;
  align-items:start;padding:14px 0 64px;
}
.prose{
  min-width:0;
  padding:clamp(20px,3.6vw,42px);
  border:4px solid rgba(23,38,32,.88);border-radius:28px;
  background:linear-gradient(180deg,#fff,#f5fef9);
  box-shadow:inset -4px -4px 14px rgba(23,38,32,.1), inset 4px 4px 14px #fff, 10px 14px 26px rgba(23,38,32,.13);
}
.prose > article{padding:26px 0;border-top:3px dashed var(--line)}
.prose > article:first-child{border-top:0;padding-top:0}
.prose > article:last-child{padding-bottom:0}
[id]{scroll-margin-top:112px}
.prose h2,.prose h3{
  font-family:var(--font-display);font-weight:600;line-height:1.25;
  margin:.3rem 0 .7rem;letter-spacing:.01em;
}
.prose h2{font-size:clamp(1.5rem,3.2vw,2.05rem)}
.prose h3{font-size:clamp(1.2rem,2.4vw,1.5rem)}
.prose small{
  display:block;margin-bottom:.2rem;
  font-family:var(--font-display);font-size:.82rem;letter-spacing:.3em;
  color:var(--green);
}
.prose p,.prose li{max-width:66ch}
.prose p{margin:0 0 1.05rem}
.prose ul,.prose ol{margin:0 0 1.05rem;padding-left:1.3rem}
.prose li{margin:.25rem 0}
.prose figure{margin:1.4rem 0}
.prose figure img{border-radius:22px;border:3px solid var(--line);box-shadow:var(--clay)}
.prose blockquote{
  margin:1.4rem 0;padding:14px 18px;
  border:3px solid var(--line);border-left:8px solid var(--mint);border-radius:20px;
  background:#f4fef9;color:var(--ink-2);
}
.prose code{
  padding:.1em .4em;border-radius:8px;background:#eafaf3;
  border:1px solid var(--line);font-size:.94em;
}

/* 侧栏 */
.side{
  display:flex;flex-direction:column;gap:8px;
  padding:20px 18px;
  border:3px solid var(--line);border-radius:24px;
  background:linear-gradient(180deg,#f1fdf8,#e3f1f9);
  box-shadow:var(--clay), inset 0 3px 0 #fff;
}
.eyebrow{font-family:var(--font-display);font-size:.78rem;letter-spacing:.3em;color:var(--green)}
.side-title{font-family:var(--font-display);font-size:1.4rem;font-weight:600;margin:0 0 .4rem}
.side ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.side ol a{
  display:flex;align-items:center;min-height:42px;padding:4px 10px;
  border-radius:13px;text-decoration:none;color:var(--ink);font-size:.94rem;
  border:2px solid transparent;
}
.side ol a:hover,.side ol a:focus-visible{background:#fff;border-color:var(--line)}
.side-top{
  margin-top:8px;display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;border-radius:15px;border:3px solid var(--ink);
  background:#fff;text-decoration:none;color:var(--ink);font-size:.92rem;font-weight:700;
  box-shadow:0 4px 0 rgba(23,38,32,.8), inset 0 3px 0 #fff;
}
.side-top:active{transform:translateY(4px);box-shadow:none}

/* 页脚 */
footer{
  margin-top:20px;padding:clamp(26px,4.6vw,52px) clamp(14px,3.4vw,30px) 26px;
  border-top:4px solid rgba(23,38,32,.85);
  background:linear-gradient(180deg,#e9fdf4,#d9eef9);
}
.cta-block{
  max-width:1160px;margin:0 auto 30px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:clamp(20px,3.6vw,36px);
  background:#fff;border:4px solid var(--ink);border-radius:28px;
  box-shadow:inset -4px -4px 14px rgba(23,38,32,.1), inset 4px 4px 14px #fff, 8px 12px 22px rgba(23,38,32,.16);
}
.cta-block b{font-family:var(--font-display);font-size:clamp(1.5rem,4vw,2.4rem);font-weight:600;line-height:1.2}
.foot-cols{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px 20px}
.foot-cols dl{
  margin:0;padding:14px 16px;
  border:3px solid var(--line);border-radius:20px;
  background:rgba(255,255,255,.66);
}
.foot-cols dt{font-size:.78rem;letter-spacing:.22em;color:var(--green)}
.foot-cols dd{margin:6px 0 0;font-size:.95rem;display:flex;flex-wrap:wrap;gap:2px 14px}
.foot-cols dd a{display:inline-flex;align-items:center;min-height:40px;text-decoration:none;color:var(--ink)}
.copy{max-width:1160px;margin:26px auto 0;text-align:center;font-size:.86rem;color:var(--ink-2)}

/* 动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease-out, transform .55s cubic-bezier(.34,1.56,.64,1)}
.reveal.in{opacity:1;transform:none}
.flash{animation:flash .9s ease-out}
@keyframes flash{0%{background:#e6fff5}100%{background:transparent}}

@media (min-width:760px){
  .foot-cols{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (min-width:900px){
  .hero{grid-template-columns:1.02fr .98fr;align-items:center;min-height:calc(100svh - 76px)}
  .hero-fig{order:-1}
}
@media (min-width:980px){
  .page-body{grid-template-columns:minmax(0,1fr) 268px;gap:30px}
  .side{position:sticky;top:104px}
}
@media (max-width:899px){
  .nav-row{justify-content:flex-start}
  .panel{right:auto;left:0}
  .hero-txt{text-align:left}
  .hero p{margin-left:0}
}
@media (max-width:560px){
  body{font-size:16.5px}
  .search input{width:100%;min-width:0}
  .search{flex:1 1 100%}
  .foot-cols{grid-template-columns:1fr}
  .cta-block{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .hero-fig{transform:none}
  .btn,.mark,.search button{transition:none}
}

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