:root{--paper:#FAF8F2;--ink:#1F2A2E;--body:#3E4B52;--mute:#7C8A8F;--green:#2E5E4E;--green-d:#20463A;
--gold:#B5A367;--gold-l:#D8CFA9;--red:#A63D2F;--line:#E7E0D0;--card:#FFFFFF;--soft:#F3EEE2}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;color:var(--body);
background:var(--paper);line-height:1.78;font-size:16.5px}
.serif,h1,h2,h3,.brand-word,.stat-n{font-family:'Noto Serif SC','Songti SC','STSong',Georgia,serif}
a{color:var(--green);text-decoration:none;transition:color .2s}
a:hover{color:var(--green-d)}
.wrap{max-width:1160px;margin:0 auto;padding:0 26px}
/* nav */
header.site{position:sticky;top:0;z-index:60;background:rgba(250,248,242,.93);backdrop-filter:blur(8px);
border-bottom:1px solid var(--line)}
.hbar{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:11px}
.brand-stack{display:flex;flex-direction:column;align-items:center;gap:4px}
.brand-cn{display:flex;flex-direction:column;align-items:center;line-height:1.3;
font-size:15px;font-weight:600;letter-spacing:2.5px;color:var(--body);margin-right:-2.5px}
.brand .seal{width:38px;height:38px;flex:0 0 38px}
.brand-domain{font-family:'Noto Sans SC',sans-serif;font-weight:600;font-size:10px;
color:var(--mute);letter-spacing:1.5px}
.brand-word small{display:block;font-family:'Noto Sans SC',sans-serif;font-weight:400;font-size:11px;
color:var(--mute);letter-spacing:2px;margin-top:1px}
nav.main{display:flex;gap:26px;align-items:center}
nav.main a{font-size:15px;color:var(--body);padding:4px 2px;border-bottom:2px solid transparent;white-space:nowrap}
nav.main a:hover{color:var(--green)}
nav.main a.on{color:var(--green);border-bottom-color:var(--gold)}
nav.main .nav-drop{position:relative}
nav.main .nav-drop summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:5px;font-size:15px;
color:var(--body);padding:4px 2px;border-bottom:2px solid transparent;white-space:nowrap}
nav.main .nav-drop summary::-webkit-details-marker{display:none}
nav.main .nav-drop summary:hover,nav.main .nav-drop summary.on{color:var(--green)}
nav.main .nav-drop summary.on{border-bottom-color:var(--gold)}
nav.main .nav-drop .caret{font-size:10px;color:var(--mute);transition:transform .18s}
nav.main .nav-drop[open] .caret{transform:rotate(180deg)}
nav.main .nav-drop[open] summary{color:var(--green)}
nav.main .nav-menu{position:absolute;left:0;top:calc(100% + 8px);min-width:150px;padding:6px;background:#FFFEF9;
border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px rgba(74,60,32,.14);z-index:80}
nav.main .nav-menu a{display:block;font-size:13.5px;color:var(--body);padding:7px 12px;border-radius:7px;
white-space:nowrap;border-bottom:2px solid transparent}
nav.main .nav-menu a:hover{background:rgba(192,178,131,.16);color:var(--green);border-bottom-color:transparent}
nav.main .nav-menu a.on{color:var(--red);border-bottom-color:transparent}
.langs{position:relative}
.langs summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:6px;font-size:13px;
color:var(--body);padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:transparent}
.langs summary::-webkit-details-marker{display:none}
.langs summary:hover,.langs[open] summary{color:var(--green);border-color:var(--gold)}
.langs .caret{font-size:10px;color:var(--mute);transition:transform .18s}
.langs[open] .caret{transform:rotate(180deg)}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:118px;padding:6px;background:#FFFEF9;
border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px rgba(74,60,32,.14);z-index:80}
.lang-menu a{display:block;font-size:13px;color:var(--body);padding:7px 12px;border-radius:7px;white-space:nowrap}
.lang-menu a:hover{background:rgba(192,178,131,.16);color:var(--green)}
.lang-menu a.on{color:var(--red);font-weight:600}
@media(max-width:960px){
.hbar{flex-wrap:wrap;height:auto;padding:12px 0 0}
.brand{order:1}
.brand .seal{width:34px;height:34px;flex:0 0 34px}
.brand-word{font-size:17px}
.langs{order:2;margin-left:auto}
nav.main{order:3;width:100%;display:flex;gap:18px;overflow-x:auto;
-webkit-overflow-scrolling:touch;padding:6px 0 10px;scrollbar-width:none}
nav.main::-webkit-scrollbar{display:none}
nav.main a{font-size:14.5px}
}
/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
background:linear-gradient(180deg,#F6F2E7 0%,var(--paper) 100%)}
.hero canvas{position:absolute;inset:0;width:100%;height:100%}
.hero-in{position:relative;z-index:2;padding:84px 0 76px;text-align:center}
.inkring{position:absolute;left:50%;top:46%;width:560px;height:560px;margin:-280px 0 0 -280px;border-radius:50%;
background:radial-gradient(circle,rgba(46,94,78,.055) 0%,rgba(46,94,78,.10) 46%,rgba(46,94,78,0) 68%);
animation:breathe 9s ease-in-out infinite;pointer-events:none}
@keyframes breathe{0%,100%{transform:scale(1);opacity:.85}50%{transform:scale(1.07);opacity:1}}
.hero h1{font-size:clamp(40px,6vw,66px);color:var(--ink);letter-spacing:14px;text-indent:14px;font-weight:700}
.hero .en-title{letter-spacing:1px;text-indent:1px}
.hero .tagline{margin:14px 0 8px;color:var(--gold);font-size:14px;letter-spacing:6px;text-indent:6px}
.hero p.sub{max-width:640px;margin:16px auto 0;color:var(--body);font-size:17px}
.hero .ctas{margin-top:38px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 34px;border-radius:3px;font-size:15.5px;letter-spacing:2px;
border:1px solid var(--green);transition:all .22s}
.btn.pri{background:var(--green);color:#fff}
.btn.pri:hover{background:var(--green-d);color:#fff}
.btn.sec{color:var(--green);background:rgba(255,255,255,.7)}
.btn.sec:hover{background:#fff;color:var(--green-d)}
/* stats */
.stats{background:var(--green-d);color:#EDE8DA}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding-top:36px;padding-bottom:36px}
.stat{text-align:center;padding:0 14px}
.stat-n{font-size:42px;color:#fff;line-height:1.15}
.stat-n em{font-style:normal;font-size:22px;color:var(--gold-l)}
.stat h4{font-family:'Noto Sans SC',sans-serif;font-size:15px;font-weight:600;color:var(--gold-l);
margin:6px 0 4px;letter-spacing:1px}
.stat p{font-size:12.8px;color:#B9C6BC;line-height:1.6}
@media(max-width:860px){.stats .wrap{grid-template-columns:repeat(2,1fr);gap:26px 8px}}
/* section */
section.block{padding:54px 0 10px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;
margin-bottom:30px}
.kicker{color:var(--gold);font-size:13px;letter-spacing:5px;font-weight:600}
.sec-head h2{font-size:30px;color:var(--ink);margin-top:6px;letter-spacing:1px}
.more{font-size:14.5px;color:var(--green);white-space:nowrap;border-bottom:1px dashed var(--gold)}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding-bottom:36px}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:26px 22px;
transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden}
.card::after{content:"";position:absolute;left:0;top:0;width:100%;height:3px;
background:linear-gradient(90deg,var(--gold),rgba(181,163,103,0));opacity:0;transition:opacity .25s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(31,42,46,.08)}
.card:hover::after{opacity:1}
.card h3{font-size:18.5px;color:var(--ink);margin-bottom:10px;letter-spacing:.5px}
.card h3 .py{display:block;font-family:'Noto Sans SC',sans-serif;font-size:12px;color:var(--mute);
letter-spacing:1.5px;font-weight:400;margin-top:2px}
.card p{font-size:14.6px;color:var(--body);line-height:1.75}
@media(max-width:1020px){.cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.cards{grid-template-columns:1fr}}
/* band */
.band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--soft);
padding:44px 0}
.band-in{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.band h2{font-size:28px;color:var(--ink);margin:8px 0 14px}
.band p{font-size:15.5px}
.band .more{display:inline-block;margin-top:18px}
.band-art{position:relative;height:230px;background:var(--card);border:1px solid var(--line);border-radius:6px;
display:flex;align-items:center;justify-content:center;overflow:hidden}
.band-art .big{font-size:120px;color:rgba(46,94,78,.16);font-weight:700;line-height:1}
.band-art .cap{position:absolute;bottom:12px;right:16px;font-size:12px;color:var(--mute)}
@media(max-width:860px){.band-in{grid-template-columns:1fr}}
/* page head */
.page-head{padding:46px 0 8px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#F6F2E7,var(--paper))}
.page-head h1{font-size:36px;color:var(--ink);letter-spacing:2px}
.page-head .lead{max-width:760px;margin-top:12px;color:var(--body);font-size:16.5px}
.crumb{font-size:13px;color:var(--mute);margin-bottom:16px;letter-spacing:1px}
.crumb a{color:var(--mute)}
/* timeline */
.timeline{position:relative;max-width:820px;margin:26px auto 50px;padding-left:34px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
background:linear-gradient(180deg,var(--gold),var(--line))}
.tl-item{position:relative;padding:0 0 34px 22px}
.tl-item::before{content:"";position:absolute;left:-33px;top:8px;width:12px;height:12px;border-radius:50%;
background:var(--paper);border:3px solid var(--green)}
.tl-era{display:inline-block;font-size:12.5px;letter-spacing:2px;color:var(--green);
border:1px solid var(--gold-l);border-radius:20px;padding:2px 14px;background:#fff}
.tl-item h3{font-size:20px;color:var(--ink);margin:10px 0 6px}
.tl-item p{max-width:820px;font-size:15.2px}
/* herbs */
.hgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:8px 0 10px}
.hcard{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:24px 20px}
.hcard h3{font-size:19px;color:var(--green-d)}
.hcard .py{font-size:12.5px;color:var(--gold);letter-spacing:1.5px;margin:2px 0 10px}
.hcard .nat{font-size:12.8px;color:var(--mute);border-top:1px dashed var(--line);padding-top:10px;margin-bottom:10px}
.hcard p{font-size:14.3px}
@media(max-width:1020px){.hgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.hgrid{grid-template-columns:1fr}}
.quote{background:var(--card);border-left:4px solid var(--gold);border-radius:0 6px 6px 0;
padding:24px 28px;margin:6px 0 40px;font-size:16px;color:var(--ink)}
.quote small{display:block;margin-top:8px;color:var(--mute)}
/* formulas */
.fgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;padding:10px 0 6px}
.fcard{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:28px 26px;position:relative}
.fcard .no{position:absolute;top:22px;right:24px;font-family:Georgia,serif;font-size:15px;color:var(--gold)}
.fcard h3{font-size:20.5px;color:var(--ink)}
.fcard .py{font-size:12.5px;color:var(--gold);letter-spacing:1.5px;margin:2px 0 10px}
.fcard .src{display:inline-block;font-size:12.5px;color:var(--green);background:#F0F4EE;
border-radius:3px;padding:2px 10px;margin-bottom:12px}
.fcard .comp{font-size:14px;color:var(--mute);border-top:1px dashed var(--line);padding-top:12px;margin:10px 0}
.fcard .comp b{color:var(--body);font-weight:600}
.fcard p.fx{font-size:14.6px}
@media(max-width:860px){.fgrid{grid-template-columns:1fr}}
.note{background:#FBF6EC;border:1px solid var(--gold-l);border-radius:6px;padding:18px 22px;
font-size:13.8px;color:#6B5F3E;margin:16px 0 46px}
/* evidence */
.ev{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;padding:10px 0 10px}
.evcard{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:26px 24px}
.evcard .n{font-family:Georgia,serif;color:var(--gold);font-size:14px;letter-spacing:2px}
.evcard h3{font-size:19px;color:var(--ink);margin:6px 0 10px}
.evcard p{font-size:14.6px}
@media(max-width:860px){.ev{grid-template-columns:1fr}}
/* global */
.gl{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;padding:6px 0 0px}
.outlook{margin:14px 0 50px;text-align:center;padding:44px 26px;background:var(--green-d);
border-radius:6px;color:#EDE8DA}
.outlook .serif{font-size:23px;color:#fff;letter-spacing:3px;margin-bottom:10px}
.outlook p{max-width:680px;margin:0 auto;font-size:14.8px;color:#B9C6BC}
/* about */
.ab{padding:20px 0 50px}
.ab .lead{font-size:17.5px;color:var(--ink)}
.ab ul{list-style:none;margin:26px 0}
.ab li{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:20px 24px;margin-bottom:14px}
.ab li h3{font-size:17px;color:var(--green-d);margin-bottom:6px}
.ab li p{font-size:14.8px}
.supcard{background:linear-gradient(135deg,#F6F2E7,#F1EAD8);border:1px solid var(--gold-l);border-radius:6px;
padding:30px 32px;text-align:center}
.supcard h3{font-size:14px;color:var(--gold);letter-spacing:5px;margin-bottom:10px}
.supcard .name{font-size:26px;color:var(--ink);letter-spacing:3px}
.supcard p{font-size:13.5px;color:var(--mute);margin-top:8px}
/* footer */
footer.site{background:#fff;border-top:1px solid var(--line);padding:38px 0 30px;color:var(--body)}
.fbar{display:flex;justify-content:space-between;gap:26px;flex-wrap:wrap;align-items:flex-start}
footer .fnote{max-width:560px;font-size:13px;color:var(--mute);margin-top:10px}
footer .fnav{display:flex;gap:18px;font-size:13.5px;flex-wrap:wrap}
footer .copy{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);font-size:12.5px;color:var(--mute);
display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
/* ── 手机端(≤640px)精排 ── */
@media(max-width:640px){
.wrap{padding:0 18px}
.hero-in{padding:48px 0 40px}
.hero h1{letter-spacing:7px;text-indent:7px}
.hero .tagline{letter-spacing:3px;text-indent:3px;font-size:12.5px}
.hero p.sub{font-size:15.5px}
.hero .ctas{margin-top:30px;gap:12px}
.btn{padding:12px 26px;font-size:14.5px;letter-spacing:1.5px}
.stats .wrap{padding-top:26px;padding-bottom:26px}
.stat-n{font-size:34px}
.stat p{font-size:12.2px}
section.block{padding:34px 0 6px}
.sec-head h2{font-size:26px}
.card{padding:22px 18px}
.page-head{padding:30px 0 6px}
.page-head h1{font-size:29px;letter-spacing:1px}
.page-head .lead{font-size:15.5px}
.band{padding:30px 0}
.band h2{font-size:24px}
.band-in{gap:30px}
.band-art{height:170px}
.band-art .big{font-size:88px}
.timeline{padding-left:26px;margin:22px 0 34px}
.tl-item{padding-bottom:28px}
.tl-item h3{font-size:18px}
.quote{padding:18px 16px;font-size:15px}
.hcard{padding:20px 16px}
.fcard{padding:22px 18px}
.evcard{padding:22px 18px}
.supcard{padding:24px 18px}
.supcard .name{font-size:22px}
.outlook{padding:34px 20px;margin:14px 0 30px}
.outlook .serif{font-size:20px;letter-spacing:2px}
.note{padding:16px 16px;font-size:13px;margin-bottom:30px}
footer .fnote{font-size:12.5px}
}