:root{
  --xuan:#F4EFE6;
  --mo:#2B2925;
  --qing:#5B8C7B;
  --chi:#B5462F;
  --huang:#C9A24B;
  --bai:#FAF6EC;
  --hei:#1C1B19;
  --ink-soft:#6b6357;
  --line:rgba(43,41,37,.12);
  --serif:"Noto Serif SC",serif;
  --sans:"Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--sans);color:var(--mo);background:var(--xuan);line-height:1.85;-webkit-font-smoothing:antialiased;}
img,svg{display:block;max-width:100%;}
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:14px 6vw;background:rgba(244,239,230,.86);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
.nav__brand{font-family:var(--serif);font-weight:600;font-size:20px;letter-spacing:.18em;color:var(--mo);text-decoration:none;}
.nav__links{display:flex;gap:26px;}
.nav__links a{color:var(--ink-soft);text-decoration:none;font-size:15px;letter-spacing:.1em;transition:color .25s;}
.nav__links a:hover{color:var(--chi);}
.nav__toggle{display:none;background:none;border:none;font-size:24px;color:var(--mo);cursor:pointer;}
.hero{position:relative;min-height:88vh;display:flex;align-items:center;justify-content:center;text-align:center;background:radial-gradient(120% 90% at 50% 0%,rgba(91,140,123,.10),transparent 60%),linear-gradient(180deg,#efe8da,#F4EFE6);overflow:hidden;}
.hero__smoke{position:absolute;bottom:0;left:50%;transform:translateX(-50%);height:62vh;width:auto;opacity:.5;}
.smoke{fill:none;stroke:var(--qing);stroke-width:1.4;stroke-linecap:round;opacity:.55;stroke-dasharray:520;stroke-dashoffset:520;animation:rise 7s ease-in-out infinite;}
.smoke--2{stroke:var(--huang);animation-delay:1.6s;}
.smoke--3{stroke:var(--chi);opacity:.4;animation-delay:3.1s;}
@keyframes rise{0%{stroke-dashoffset:520;}60%{stroke-dashoffset:0;}100%{stroke-dashoffset:-520;}}
.hero__inner{position:relative;z-index:2;padding:0 6vw;}
.hero__eyebrow{font-size:14px;letter-spacing:.3em;color:var(--qing);margin-bottom:18px;}
.hero__title{font-family:var(--serif);font-weight:700;font-size:clamp(48px,9vw,96px);letter-spacing:.22em;color:var(--mo);}
.hero__sub{font-family:var(--serif);font-size:clamp(18px,3vw,26px);letter-spacing:.4em;color:var(--ink-soft);margin:14px 0 26px;}
.hero__desc{font-size:16px;color:var(--ink-soft);}
.hero__cta{display:inline-block;margin-top:36px;padding:13px 38px;border:1px solid var(--mo);border-radius:999px;font-size:15px;letter-spacing:.18em;color:var(--mo);text-decoration:none;transition:all .3s;}
.hero__cta:hover{background:var(--mo);color:var(--bai);}
.section{max-width:1120px;margin:0 auto;padding:92px 6vw;}
.section--alt{background:rgba(91,140,123,.06);max-width:none;}
.section--alt > *{max-width:1120px;margin-left:auto;margin-right:auto;}
.section__title{font-family:var(--serif);font-weight:600;font-size:clamp(28px,4vw,40px);text-align:center;letter-spacing:.16em;margin-bottom:14px;}
.section__lead{text-align:center;color:var(--ink-soft);font-size:16px;letter-spacing:.06em;margin-bottom:52px;}
.grid{display:grid;gap:24px;}
.grid--3{grid-template-columns:repeat(3,1fr);}
.grid--4{grid-template-columns:repeat(4,1fr);}
.grid--5{grid-template-columns:repeat(5,1fr);}
.card{background:#fffdf8;border:1px solid var(--line);border-radius:14px;padding:30px 26px;transition:transform .35s,box-shadow .35s;}
.card:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(43,41,37,.10);}
.card h3{font-family:var(--serif);font-size:21px;letter-spacing:.08em;margin-bottom:12px;color:var(--mo);}
.card p{font-size:15px;color:var(--ink-soft);}
.card__tag{display:inline-block;font-family:var(--serif);font-size:14px;letter-spacing:.1em;padding:3px 12px;border-radius:999px;color:#fff;margin-bottom:14px;}
.card__tag--qing{background:var(--qing);}
.card__tag--chi{background:var(--chi);}
.card__tag--huang{background:var(--huang);}
.card__tag--hei{background:var(--hei);}
.card--color{text-align:center;}
.swatch{display:block;width:46px;height:46px;border-radius:50%;margin:0 auto 16px;box-shadow:0 4px 14px rgba(43,41,37,.18);}
.book{max-width:680px;margin:0 auto;display:flex;flex-direction:column;gap:18px;}
.book__row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.book__field{display:flex;flex-direction:column;gap:8px;}
.book__field span{font-size:14px;letter-spacing:.1em;color:var(--ink-soft);}
.book__field input,.book__field select,.book__field textarea{font-family:var(--sans);font-size:15px;color:var(--mo);padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fffdf8;transition:border-color .25s;}
.book__field input:focus,.book__field select:focus,.book__field textarea:focus{outline:none;border-color:var(--qing);}
.book__submit{align-self:flex-start;margin-top:6px;padding:13px 40px;border:none;border-radius:999px;background:var(--mo);color:var(--bai);font-family:var(--sans);font-size:15px;letter-spacing:.16em;cursor:pointer;transition:background .3s;}
.book__submit:hover{background:var(--qing);}
.book__hint{font-size:14px;color:var(--qing);}
.footer{background:var(--hei);color:var(--bai);padding:54px 6vw;text-align:center;}
.footer__brand{font-family:var(--serif);font-size:22px;letter-spacing:.24em;margin-bottom:8px;}
.footer__line{font-size:14px;letter-spacing:.2em;color:rgba(250,246,236,.7);margin-bottom:18px;}
.footer__meta{display:block;margin-bottom:14px;}
.footer__meta a{color:#cfc8ba;text-decoration:none;border-bottom:1px solid rgba(207,200,186,.4);padding-bottom:1px;}
.footer__meta a:hover{border-bottom-color:var(--bai);}
.footer__gongan{display:block;margin-bottom:14px;}
.footer__gongan a{color:#cfc8ba;text-decoration:none;border-bottom:1px solid rgba(207,200,186,.4);padding-bottom:1px;}
.footer__gongan a:hover{border-bottom-color:var(--bai);}
.footer__gongan img{display:inline-block;width:14px;height:14px;vertical-align:-2px;margin-right:5px;}
.footer__copy{font-size:12px;letter-spacing:.08em;color:rgba(250,246,236,.5);}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease;}
.reveal.is-visible{opacity:1;transform:none;}
@media (max-width:980px){.grid--5{grid-template-columns:repeat(3,1fr);}.grid--4{grid-template-columns:repeat(2,1fr);}}
@media (max-width:760px){
  .nav__toggle{display:block;}
  .nav__links{position:absolute;top:100%;right:0;left:0;flex-direction:column;gap:0;background:var(--xuan);border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .35s ease;}
  .nav__links.open{max-height:340px;}
  .nav__links a{padding:14px 6vw;border-top:1px solid var(--line);}
  .grid--3,.grid--4,.grid--5{grid-template-columns:1fr;}
  .book__row{grid-template-columns:1fr;}
  .section{padding:64px 6vw;}
}