:root{
  --bg:#faf8f4; --fg:#1c1915; --fg2:#4d473d; --fg3:#948b7c;
  --amber:#a8742c; --amber-dim:rgba(168,116,44,.45);
  --line:rgba(28,25,21,.1);
  --card-hover:#f1ebe1;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",Georgia,"SimSun",serif;
  --mono:"SF Mono","Fira Code",Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:var(--sans);overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block}
::selection{background:var(--amber-dim);color:#1c1915}

/* ---------- nav ---------- */
nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;
  padding:14px 40px;transition:background .4s,box-shadow .4s;border-bottom:1px solid transparent}
nav.scrolled{background:rgba(250,248,244,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:34px;height:34px}
.brand span{font-family:var(--mono);font-size:18px;letter-spacing:.12em}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{font-family:var(--mono);font-size:13px;color:var(--fg2);letter-spacing:.08em;transition:color .3s}
.nav-links a:hover,.nav-links a.active{color:var(--amber)}
.nav-cta{border:1px solid var(--amber-dim);border-radius:999px;padding:8px 20px;color:var(--amber)!important}
.nav-cta:hover{background:rgba(168,116,44,.08)}
@media(max-width:820px){.nav-links{display:none}nav{padding:12px 20px}}
/* 手机端汉堡菜单 */
.nav-toggle{display:none;background:rgba(255,255,255,.6);border:1px solid var(--amber-dim);border-radius:10px;padding:7px 13px;font-size:17px;line-height:1;color:var(--amber);cursor:pointer;font-family:var(--mono)}
@media(max-width:820px){.nav-toggle{display:block}}
.nav-dropdown{display:none;position:fixed;top:60px;right:14px;z-index:101;flex-direction:column;min-width:180px;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:14px;box-shadow:0 16px 48px rgba(90,60,20,.16);padding:8px;overflow:hidden}
.nav-dropdown.open{display:flex}
.nav-dropdown a{padding:13px 20px;font-family:var(--mono);font-size:14px;letter-spacing:.1em;color:var(--fg2);border-radius:8px;transition:all .25s}
.nav-dropdown a:hover,.nav-dropdown a.active{color:var(--amber);background:rgba(168,116,44,.08)}

/* ---------- hero ---------- */
#hero{position:relative;height:100vh;height:100svh;min-height:640px;display:flex;flex-direction:column;justify-content:center;overflow:hidden;background-size:cover;background-position:68% center}
#rain{position:absolute;inset:0;width:100%;height:100%}
.hero-inner{position:relative;z-index:2;padding:0 40px;max-width:1100px}
.hero-title{font-family:var(--serif);font-weight:700;font-size:clamp(56px,8.4vw,110px);letter-spacing:.04em;line-height:1.08}
.hero-sub{margin-top:26px;font-size:clamp(15px,1.6vw,19px);color:var(--fg2);line-height:1.9;letter-spacing:.05em}
.hero-cta{margin-top:56px;display:inline-flex;align-items:center;gap:12px;border:1px solid var(--amber-dim);
  border-radius:999px;padding:16px 38px;font-family:var(--mono);font-size:15px;letter-spacing:.1em;color:var(--amber);
  background:rgba(255,255,255,.55);backdrop-filter:blur(8px);transition:all .35s;cursor:pointer}
.hero-cta:hover{background:rgba(168,116,44,.1);transform:translateY(-2px);box-shadow:0 12px 40px rgba(168,116,44,.18)}
@media(max-width:760px){.hero-inner{padding:0 20px}}
/* 手机端 hero：与电脑端一致（整图背景 + 数字雨浮于图片表面），叠加额外遮罩保证文字可读 */
@media(max-width:760px){
  #hero{background-position:center center}
  #hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(250,248,244,.78) 0%,rgba(250,248,244,.5) 55%,rgba(250,248,244,.3) 100%)}
}
@media(max-width:640px){.features{grid-template-columns:1fr}}

/* ---------- sections ---------- */
section{padding:96px 40px;max-width:1280px;margin:0 auto}
@media(max-width:760px){section{padding:72px 20px}}
.label{font-family:var(--mono);font-size:12px;letter-spacing:.35em;color:var(--fg3);text-transform:uppercase}
.rule{height:1px;background:var(--line);margin:22px 0 60px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:16px}
.more-link{font-family:var(--mono);font-size:13px;color:var(--amber);letter-spacing:.1em;transition:opacity .3s}
.more-link:hover{opacity:.7}

/* business cards */
.bcards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
@media(max-width:960px){.bcards{grid-template-columns:1fr}}
.bcard{background:var(--bg);display:flex;flex-direction:column;transition:background .4s}
.bcard:hover{background:var(--card-hover)}
.bcard img{width:100%;height:280px;object-fit:cover;filter:grayscale(35%) brightness(.94);transition:filter .5s}
.bcard:hover img{filter:grayscale(0%) brightness(1)}
.bcard .body{padding:30px 32px 34px}
.bcard h3{font-family:var(--serif);font-size:clamp(24px,2.4vw,34px);font-weight:600;letter-spacing:.04em;transition:color .35s}
.bcard:hover h3{color:var(--amber)}
.bcard p{margin-top:16px;color:var(--fg2);font-size:14px;line-height:1.95}
.bcard .go{margin-top:22px;font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--fg3);transition:color .3s}
.bcard:hover .go{color:var(--amber)}

/* banner */
#vision{max-width:none;padding:0}
.banner{position:relative;overflow:hidden}
.banner img{display:block;width:100%;height:auto;max-height:78vh;max-height:78svh;object-fit:cover;object-position:center;filter:brightness(.92) saturate(.9)}
@media(max-width:760px){.banner{margin-top:60px}#vision{padding-top:0!important}}
.banner::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,var(--bg) 0%,transparent 18%,transparent 82%,var(--bg) 100%)}
.vision-inner{max-width:1280px;margin:0 auto;padding:80px 40px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.vision-title{font-family:var(--serif);font-size:clamp(30px,3.6vw,52px);line-height:1.3}
.vision-desc{color:var(--fg2);font-size:15px;line-height:2.1;letter-spacing:.02em}
@media(max-width:860px){.vision-inner{grid-template-columns:1fr;padding:60px 20px}}

/* archive grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
@media(max-width:960px){.grid{grid-template-columns:repeat(2,1fr)}}
.cell{background:var(--bg);padding:26px;transition:background .4s}
.cell:hover{background:var(--card-hover)}
.cell img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:4px;filter:grayscale(70%) brightness(.95);transition:filter .5s}
.cell:hover img{filter:grayscale(10%) brightness(1)}
.cell h3{font-family:var(--serif);font-size:17px;margin-top:18px;font-weight:600;letter-spacing:.03em;line-height:1.5}
.cell .meta{display:flex;justify-content:space-between;margin-top:8px}
.cell .meta span{font-size:12px;color:var(--fg3);letter-spacing:.1em}
.cell .meta .yr{font-family:var(--mono);color:var(--amber-dim)}

/* ---------- detail pages ---------- */
.page-hero{position:relative;overflow:hidden;margin-top:65px}
.page-hero img{display:block;width:100%;height:auto;min-height:46vh;min-height:46svh;max-height:78vh;max-height:78svh;object-fit:cover;object-position:center;filter:brightness(.88) grayscale(20%)}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(250,248,244,.35) 0%,transparent 40%,var(--bg) 100%)}
.page-hero .inner{position:absolute;left:0;right:0;bottom:0;z-index:2;max-width:1280px;margin:0 auto;padding:0 40px 48px;width:100%}
.back{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--amber);opacity:.85;transition:opacity .3s}
.back:hover{opacity:1}
.page-hero h1{font-family:var(--serif);font-size:clamp(38px,5.4vw,72px);margin-top:18px;font-weight:600;text-shadow:0 2px 24px rgba(250,248,244,.8)}
.page-hero .sub{margin-top:14px;color:var(--fg2);font-size:clamp(14px,1.4vw,17px);letter-spacing:.06em;text-shadow:0 1px 12px rgba(250,248,244,.8)}
@media(max-width:760px){.page-hero{margin-top:60px}.page-hero img{min-height:0;height:430px;max-height:none}.banner img{max-height:none}.page-hero .inner{padding:0 20px 40px}}
article{max-width:860px;margin:0 auto;padding:90px 40px 40px}
@media(max-width:760px){article{padding:64px 20px 20px}}
article p{color:var(--fg2);font-size:16px;line-height:2.15;margin-bottom:34px;letter-spacing:.02em}
article p strong{color:var(--amber);font-weight:600}
.pagenav{max-width:1280px;margin:0 auto;padding:70px 40px 30px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.pn{flex:1;min-width:240px;border:1px solid var(--line);padding:26px 30px;transition:border-color .3s,background .3s}
.pn:hover{border-color:var(--amber-dim);background:var(--card-hover)}
.pn .k{font-family:var(--mono);font-size:11px;letter-spacing:.25em;color:var(--fg3)}
.pn .t{font-family:var(--serif);font-size:22px;margin-top:10px;transition:color .3s}
.pn:hover .t{color:var(--amber)}
.pn.next{text-align:right}
@media(max-width:760px){.pagenav{padding:56px 20px 20px}}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:110px 40px 60px;max-width:1280px;margin:0 auto}
@media(max-width:760px){footer{padding:72px 20px 40px}}
.foot-title{font-family:var(--serif);font-size:clamp(32px,5vw,68px);line-height:1.25;max-width:900px}
.foot-cols{display:flex;gap:120px;margin-top:80px;flex-wrap:wrap}
@media(max-width:960px){.foot-cols{gap:56px}}
.foot-col h4{font-family:var(--mono);font-size:12px;letter-spacing:.3em;color:var(--fg3);margin-bottom:24px;text-transform:uppercase}
.foot-col a{display:block;color:var(--fg2);font-size:14px;margin-bottom:14px;letter-spacing:.05em;transition:color .3s}
.foot-col a:hover{color:var(--amber)}
.foot-bottom{margin-top:90px;padding-top:28px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:16px;font-size:12px;color:var(--fg3);letter-spacing:.08em}
.foot-bottom .brandmini{display:flex;align-items:center;gap:10px;justify-self:start}
.foot-bottom .brandmini img{width:22px;height:22px}
.foot-bottom .icp{color:var(--fg3);text-decoration:none;transition:color .3s}
.foot-bottom .icp:hover,.foot-bottom .police-beian:hover{color:var(--amber)}
.foot-bottom .beian-links{justify-self:center;display:flex;flex-direction:row;align-items:center;justify-content:center;gap:20px;line-height:20px;letter-spacing:.02em;white-space:nowrap}
.foot-bottom .police-beian{display:block;color:var(--fg3);text-decoration:none;transition:color .3s;white-space:nowrap}
.foot-bottom .police-beian img{display:inline-block;width:16px;height:16px;margin-right:6px;vertical-align:-3px}
.foot-bottom .police-beian span{display:inline;vertical-align:baseline}
.foot-bottom .foot-mail{justify-self:end}
@media(max-width:1100px) and (min-width:761px){.foot-bottom{grid-template-columns:1fr;justify-items:center;row-gap:12px}.foot-bottom .brandmini,.foot-bottom .beian-links,.foot-bottom .foot-mail{justify-self:center}}
@media(max-width:760px){.foot-bottom{grid-template-columns:1fr;justify-items:center;row-gap:10px}.foot-bottom .brandmini,.foot-bottom .beian-links,.foot-bottom .foot-mail{justify-self:center}.foot-bottom .beian-links{flex-direction:column;gap:6px}}

/* reveal */
.rv{transition:opacity .9s cubic-bezier(.22,1,.36,1),transform .9s cubic-bezier(.22,1,.36,1)}
html.js .rv{opacity:0;transform:translateY(36px)}
html.js .rv.in{opacity:1;transform:none}

/* ---------- jobs ---------- */
.jobs{max-width:1280px;margin:0 auto;padding:0 40px 40px}
@media(max-width:760px){.jobs{padding:0 20px 20px}}
.jobs .label{margin-bottom:10px}
.job{border-top:1px solid var(--line);padding:44px 0}
.job:last-child{border-bottom:1px solid var(--line)}
.job h3{font-family:var(--serif);font-size:clamp(22px,2.4vw,30px);font-weight:600;letter-spacing:.04em}
.job .jtag{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--amber-dim);margin-top:8px}
.job h4{font-family:var(--mono);font-size:12px;letter-spacing:.28em;color:var(--fg3);margin:28px 0 10px;text-transform:uppercase}
.job ul{list-style:none}
.job li{color:var(--fg2);font-size:14px;line-height:2.05;padding-left:20px;position:relative}
.job li::before{content:"—";position:absolute;left:0;color:var(--amber-dim)}

/* about page */
.about-lead{font-family:var(--serif);font-size:clamp(24px,3vw,40px);line-height:1.5;font-weight:500;max-width:960px}

/* ---------- home enrich ---------- */
#hero{background:radial-gradient(1200px 620px at 78% -10%, rgba(216,164,94,.18), transparent 60%),radial-gradient(900px 520px at 8% 110%, rgba(216,164,94,.12), transparent 60%);background-size:cover;background-position:68% center}
.hero-badge{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.3em;color:var(--amber);border:1px solid var(--amber-dim);border-radius:999px;padding:9px 20px;margin-bottom:36px;background:rgba(255,255,255,.55)}
.hero-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--amber)}
.hero-actions{display:flex;gap:16px;margin-top:54px;flex-wrap:wrap}
.hero-actions .hero-cta{margin-top:0}
.hero-cta.solid{background:var(--amber);color:#fff;border-color:var(--amber)}
.hero-cta.solid:hover{background:#96641f;box-shadow:0 12px 34px rgba(168,116,44,.3);transform:translateY(-2px)}
.marquee{position:absolute;left:0;right:0;bottom:0;z-index:2;border-top:1px solid var(--line);background:rgba(250,248,244,.72);backdrop-filter:blur(8px);overflow:hidden;padding:17px 0}
.marquee-track{display:flex;width:max-content;white-space:nowrap;font-family:var(--mono);font-size:13px;letter-spacing:.22em;color:var(--fg3);animation:mq 36s linear infinite}
.marquee-track b{color:var(--amber);font-weight:400;margin:0 26px}
@keyframes mq{to{transform:translateX(-50%)}}

.bcard{position:relative;transition:background .4s,box-shadow .4s,transform .4s}
.bcard:hover{box-shadow:0 24px 60px rgba(120,90,40,.14);transform:translateY(-4px)}
.bcard .no{position:absolute;top:18px;right:22px;z-index:2;font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--fg3);background:rgba(250,248,244,.78);padding:4px 12px;border-radius:999px;backdrop-filter:blur(4px)}

/* features */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
@media(max-width:960px){.features{grid-template-columns:repeat(2,1fr)}}
.feat{background:var(--bg);padding:40px 30px 46px;transition:background .4s}
.feat:hover{background:var(--card-hover)}
.feat .ic{width:38px;height:38px;margin-bottom:24px}
.feat h3{font-family:var(--serif);font-size:20px;font-weight:600;letter-spacing:.03em}
.feat p{margin-top:14px;color:var(--fg2);font-size:13.5px;line-height:1.95}

/* about teaser */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
@media(max-width:860px){.about-grid{grid-template-columns:1fr}}
.about-grid img{width:100%;height:430px;object-fit:cover;border-radius:6px;filter:grayscale(25%) brightness(.97)}
.about-points{margin-top:36px;display:grid;gap:16px}
.about-points span{display:flex;gap:14px;color:var(--fg2);font-size:14.5px;line-height:1.8}
.about-points b{color:var(--amber);font-family:var(--mono);font-weight:500;letter-spacing:.05em}

/* expandable business cards */
.bcards .bcard{cursor:pointer}
.bcard .detail{max-height:0;overflow:hidden;opacity:0;transition:max-height .6s cubic-bezier(.22,1,.36,1),opacity .5s}
.bcard.open .detail{max-height:640px;opacity:1}
.bcard .detail p{color:var(--fg2);font-size:14px;line-height:2;margin-bottom:14px}
.bcard .detail p strong{color:var(--amber);font-weight:600}
.bcard .go{transition:color .3s}
.bcard.open .go{color:var(--amber)}

/* footer nav links */
.foot-bottom .links{display:flex;gap:26px;flex-wrap:wrap}
.foot-bottom .links a{color:var(--fg2);transition:color .3s;letter-spacing:.1em}
.foot-bottom .links a:hover{color:var(--amber)}

/* 手机端滑动稳定：微信工具栏收放会触发整页重绘，去掉高重绘成本的效果 */
@media(max-width:760px){
  nav,nav.scrolled{background:rgba(250,248,244,.96);backdrop-filter:none;-webkit-backdrop-filter:none}
  .page-hero img,.banner img{filter:none}
  html,body{overscroll-behavior:none}
}