/* ===== 引木官网·本地版 设计系统（自然 · 高端 · 大气） ===== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@500;700;900&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root{
  --bg-0:#040a06;
  --bg-1:#06120b;
  --bg-2:#0a1c12;
  --green-1:#0e2a1c;
  --green-2:#16432e;
  --gold:#c9a96a;
  --gold-soft:#e2c894;
  --gold-deep:#a8884a;
  --text:#eef3ee;
  --text-2:#c2d1c6;
  --text-3:#8aa294;
  --line:rgba(201,169,106,.20);
  --line-soft:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.035);
  --glass-strong:rgba(255,255,255,.06);
  --radius:20px;
  --maxw:1180px;
  --shadow:0 30px 80px rgba(0,0,0,.5);
  --serif:'Noto Serif SC','Songti SC','STSong',serif;
  --sans:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:auto}
body{
  font-family:var(--sans);
  background-color:var(--bg-0);
  background-image:
    url('images/texture-bg.png'),
    radial-gradient(1300px 720px at 50% -12%, rgba(22,67,46,.40), transparent 62%);
  background-repeat:repeat, no-repeat;
  background-size:256px 256px, cover;
  color:var(--text);
  line-height:1.85;
  font-weight:300;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
section{padding:118px 0;position:relative}
h1,h2,h3{font-family:var(--serif);line-height:1.3;font-weight:700;letter-spacing:.01em}
h2{font-size:clamp(28px,3.8vw,46px);margin-bottom:16px}
#about h2{font-size:clamp(20px,2.6vw,30px);white-space:nowrap}
@media(max-width:760px){#about h2{white-space:normal;font-size:clamp(22px,4vw,32px)}}
h3{font-size:22px;margin-bottom:10px;font-weight:700}
p{font-weight:300}
.lead{color:var(--text-2);font-size:18px;max-width:720px;font-weight:300}
.muted{color:var(--text-3)}

.eyebrow{
  display:inline-block;color:var(--gold);font-size:13px;letter-spacing:.34em;
  text-transform:uppercase;margin-bottom:18px;font-weight:500;font-family:var(--sans);
}

/* 玻璃面板：轻透、细金线、去科技感 */
.glass{
  background:var(--glass);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  box-shadow:0 20px 60px rgba(0,0,0,.35);
  position:relative;overflow:hidden;
}
.glass::before{content:"";position:absolute;inset:0;border-radius:var(--radius);background:linear-gradient(160deg,rgba(255,255,255,.05),transparent 42%);pointer-events:none}
.card{padding:38px;transition:transform .35s cubic-bezier(.2,.7,.2,1),border-color .35s}
.card:hover{transform:translateY(-6px);border-color:rgba(201,169,106,.42)}

/* 滚动揭示：仅在 JS 就绪(.js-reveal)后才隐藏，确保无脚本时内容始终可见 */
.js-reveal .reveal{opacity:0;transform:translateY(30px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.js-reveal .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js-reveal .reveal{opacity:1!important;transform:none!important;transition:none}
}

/* 森林光点粒子：绝对定位铺满 hero，置于内容之下、不挡点击 */
.particles{position:absolute;inset:0;z-index:2;pointer-events:none}
.hero .particles{z-index:1}

/* 按钮：克制、金、细 */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:15px 32px;border-radius:999px;font-weight:500;font-size:15px;
  transition:.25s;cursor:pointer;border:1px solid transparent;font-family:var(--sans);letter-spacing:.02em;
}
.btn-gold{background:linear-gradient(135deg,var(--gold-soft),var(--gold-deep));color:#1a1206;box-shadow:0 12px 34px rgba(201,169,106,.22)}
.btn-gold:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 16px 40px rgba(201,169,106,.32)}
.btn-ghost{border-color:rgba(201,169,106,.35);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--gold);background:rgba(201,169,106,.08);color:var(--gold-soft)}

/* 导航 */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(4,10,6,.6);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-weight:900;font-size:20px;letter-spacing:.04em}
.logo-img{height:34px;width:auto;border-radius:9px;animation:ymLogoGlow 3.4s ease-in-out infinite;will-change:filter}
/* 导航/页脚 Logo 极淡金色呼吸发光：提升品牌存在感、不占布局空间 */
@keyframes ymLogoGlow{0%,100%{filter:drop-shadow(0 0 1px rgba(212,168,75,.18))}50%{filter:drop-shadow(0 0 7px rgba(212,168,75,.40))}}
@media (prefers-reduced-motion:reduce){.logo-img{animation:none;filter:none}}
.logo .mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--green-2),var(--gold));display:grid;place-items:center;font-size:17px}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a:not(.btn){color:var(--text-2);font-size:15px;transition:.2s;font-weight:400}
.nav-links a:not(.btn):hover{color:var(--gold-soft)}
.nav-cta{padding:10px 18px;font-size:14px}
.nav.scrolled{background:rgba(4,10,6,.92);border-bottom-color:var(--line);box-shadow:0 10px 30px rgba(0,0,0,.45)}
.nav.scrolled .nav-inner{height:62px}
.nav.scrolled .logo{font-size:18px}
.nav.scrolled .logo-img{height:30px}
@media(max-width:1100px){
  .nav-links{gap:18px}
  .nav-links a{font-size:14px}
  .nav-cta{padding:9px 14px;font-size:13px}
}
@media(max-width:900px){.nav-links a:not(.nav-cta){display:none}}

/* ===== Hero（首页视频版） ===== */
.hero-video{
  position:relative;min-height:100vh;display:flex;align-items:flex-end;justify-content:center;
  overflow:hidden;padding-bottom:0;
}
.hero-bg{position:absolute;inset:0;z-index:1;background:url('images/hero-forest-soft.jpg') center/cover no-repeat}
.hero-bg img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-bg video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .8s ease}
.hero-bg video.is-playing{opacity:1}
.hero-overlay{
  position:absolute;inset:0;z-index:2;
  background:linear-gradient(to bottom,
    rgba(4,10,6,.30) 0%,
    rgba(4,10,6,.45) 38%,
    rgba(4,10,6,.90) 74%,
    rgba(4,10,6,.98) 100%);
}
.hero-content{position:relative;z-index:3;text-align:center;padding:0 24px 17vh;max-width:920px;width:100%}
.hero-content h1{font-size:clamp(40px,6.4vw,76px);line-height:1.16;font-weight:900;margin-bottom:22px;letter-spacing:.01em}
.hero-content h1 .hl{background:linear-gradient(120deg,var(--gold-soft),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-content p{font-size:19px;color:rgba(238,243,238,.82);max-width:640px;margin:0 auto 32px;font-weight:300}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.scroll-cue{
  position:absolute;left:50%;bottom:34px;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  color:var(--gold-soft);font-size:11px;letter-spacing:.3em;
  text-transform:uppercase;opacity:.85;
  text-shadow:0 2px 10px rgba(0,0,0,.5);
  pointer-events:none
}
.scroll-track{
  width:22px;height:34px;border-radius:12px;
  border:1.5px solid rgba(201,169,106,.55);
  background:linear-gradient(180deg,rgba(201,169,106,.08),rgba(201,169,106,.02));
  box-shadow:0 0 14px rgba(201,169,106,.18), inset 0 0 8px rgba(201,169,106,.06);
  display:flex;justify-content:center;padding-top:6px;
  position:relative
}
.scroll-wheel{
  width:5px;height:5px;border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 8px rgba(201,169,106,.8);
  animation:scrollWheel 2s ease-in-out infinite
}
@keyframes scrollWheel{0%{opacity:0;transform:translateY(0)}20%{opacity:1}80%{opacity:1}100%{opacity:0;transform:translateY(16px)}}

/* ===== Hero（子页：森林静帧） ===== */
.hero{
  position:relative;text-align:center;padding:150px 0 96px;overflow:hidden;
  background-image:url('images/hero-forest-soft.jpg');background-size:cover;background-position:center;
}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,rgba(4,10,6,.62),rgba(4,10,6,.86));z-index:1}
.hero .wrap{position:relative;z-index:2}
.hero h1{font-size:clamp(34px,5vw,60px);font-weight:900;margin-bottom:20px;line-height:1.2}
.hero h1 .hl{background:linear-gradient(120deg,var(--gold-soft),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:18px;color:rgba(238,243,238,.78);max-width:640px;margin:0 auto;font-weight:300}
.hero .tag{margin-top:22px}

/* 网格 */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:880px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

.tag{display:inline-block;font-size:12.5px;color:var(--gold-soft);border:1px solid rgba(201,169,106,.35);border-radius:999px;padding:5px 14px;background:rgba(201,169,106,.06);font-weight:400}
.tag-solid{display:inline-block;font-size:12px;color:#1a1206;border-radius:999px;padding:5px 13px;background:linear-gradient(135deg,var(--gold-soft),var(--gold));font-weight:600}
.kpi{font-family:var(--serif);font-size:40px;font-weight:900;color:var(--gold-soft);line-height:1.1}
.kpi small{display:block;font-family:var(--sans);font-size:13px;color:var(--text-3);font-weight:400;margin-top:6px;letter-spacing:.04em}

/* 步骤 */
.step{display:flex;gap:18px;align-items:flex-start}
.step .num{flex:none;width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--green-2),var(--gold));color:#1a1206;font-weight:800;display:grid;place-items:center;font-size:18px}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:760px){.timeline{grid-template-columns:1fr}}

/* 对比 */
.vs{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:stretch}
.vs .mid{display:grid;place-items:center;color:var(--gold);font-family:var(--serif);font-weight:900;font-size:24px}
@media(max-width:820px){.vs{grid-template-columns:1fr}.vs .mid{padding:6px 0}}
.vs ul{list-style:none;margin-top:12px}
.vs li{padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.09);font-size:15px;color:var(--text-2);font-weight:300}
.vs li::before{content:"·";color:var(--gold);margin-right:9px}

/* 提成阶梯 */
.tier{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.tier .row{display:flex;justify-content:space-between;align-items:center;padding:18px 22px}
.tier .pct{font-family:var(--serif);font-size:26px;font-weight:900;color:var(--gold-soft)}
@media(max-width:680px){.tier{grid-template-columns:1fr}}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:flow}
@media(max-width:760px){.flow{grid-template-columns:1fr}}
.flow .step-card{position:relative;padding:56px 30px 30px;overflow:visible}
.flow .step-card::before{counter-increment:flow;content:counter(flow);position:absolute;top:16px;left:24px;width:32px;height:32px;border-radius:50%;background:var(--gold);color:#1a1206;font-weight:800;display:grid;place-items:center;font-size:14px}
.flow .step-card b{white-space:nowrap;font-size:16px;display:block}

/* FAQ */
.faq details{border:1px solid var(--line-soft);border-radius:14px;padding:4px 22px;margin-bottom:14px;background:var(--glass)}
.faq summary{cursor:pointer;font-weight:500;padding:16px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;font-family:var(--serif);font-size:17px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold);font-size:24px;font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq p{padding:0 0 18px;color:var(--text-2)}

/* 面包屑 */
.crumb{font-size:14px;color:var(--text-3);padding:24px 0 0}
.crumb a:hover{color:var(--gold)}

/* 页脚 */
.footer{border-top:1px solid var(--line-soft);padding:60px 0 44px;margin-top:40px;background:rgba(4,10,6,.55)}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.footer h4{color:var(--gold);font-size:13px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:16px;font-family:var(--sans);font-weight:500}
@media(max-width:760px){
  .footer .cols{grid-template-columns:1fr;gap:28px}
  .footer .cols > div:first-child{margin-bottom:4px}
  .footer .cols > div:not(:first-child){display:flex;flex-wrap:wrap;gap:6px 18px;align-items:baseline}
  .footer .cols > div:not(:first-child) h4{width:100%;margin-bottom:6px;font-size:12.5px}
  .footer .cols > div:not(:first-child) a{display:inline-block;padding:4px 0;font-size:14.5px;white-space:nowrap}
}
.footer a{display:block;color:var(--text-2);padding:6px 0;font-size:15px;font-weight:300;transition:.2s}
.footer a:hover{color:var(--gold-soft)}
.footer-tel{color:var(--gold-soft)!important;font-size:15px;font-weight:500;letter-spacing:.02em;opacity:.95}
.footer-tel:hover{opacity:1}
/* CTA 区电话咨询按钮：醒目引导拨号 */
.btn-call{display:inline-flex;align-items:center;gap:9px;margin-top:20px;padding:13px 28px;border-radius:999px;background:linear-gradient(135deg,var(--gold-soft),var(--gold-deep));color:#0a1c12;font-weight:700;font-size:16px;letter-spacing:.02em;box-shadow:0 8px 24px rgba(212,168,75,.35);transition:.25s;white-space:nowrap}
.btn-call:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(212,168,75,.5);color:#0a1c12}
.btn-call svg{width:18px;height:18px;fill:currentColor;flex:none}
.cta-band .btn-call-wrap{text-align:center}
@media(max-width:760px){
  .cta-band .hero-cta .btn,
  .cta-band .btn-call{width:min(100%,300px);justify-content:center}
}
.footer .copy{margin-top:38px;color:var(--text-3);font-size:13.5px;border-top:1px solid rgba(255,255,255,.07);padding-top:22px;font-weight:300}

/* CTA 横幅 */
.cta-band{text-align:center;padding:64px 30px;margin:20px auto;max-width:var(--maxw);border:1px solid var(--line)}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:var(--text-2);margin-bottom:26px}

/* 缩略图标（通用底座：AI 工作组卡等复用；案例卡在其上延展） */
.thumb{display:grid;place-items:center;border-radius:12px;background:linear-gradient(135deg,var(--green-2),rgba(201,169,106,.35))}

/* AI 智能体像素形象：方形立绘，顶部对齐突出角色，圆角+轻发光 */
.agent-thumb{height:190px;overflow:hidden;background:radial-gradient(120% 120% at 50% 20%,rgba(201,169,106,.14),rgba(201,169,106,.03) 55%),linear-gradient(180deg,#0b140e,#070d09);border:1px solid rgba(201,169,106,.22);box-shadow:0 0 0 1px rgba(0,0,0,.25),0 8px 24px rgba(0,0,0,.28),inset 0 0 24px rgba(201,169,106,.05)}
.agent-thumb img{width:100%;height:100%;object-fit:cover;object-position:center 18%;display:block;image-rendering:auto}

/* 案例卡 */
.case-card{display:flex;flex-direction:column;gap:12px;overflow:hidden}
.case-card .thumb{height:140px;border-radius:12px;background:linear-gradient(135deg,var(--green-2),rgba(201,169,106,.35));display:grid;place-items:center;font-size:44px}
.case-card h3{margin:0;font-size:20px}
.case-card .case-head{margin-bottom:0}
.case-head{display:flex;align-items:center;gap:16px;margin-bottom:14px}
.case-icon{width:58px;height:58px;border-radius:14px;background:linear-gradient(135deg,var(--green-2),rgba(201,169,106,.35));display:grid;place-items:center;flex-shrink:0}
.case-title{display:flex;flex-direction:column;gap:6px;justify-content:center;min-width:0}
.case-title h3{margin:0;font-size:24px;line-height:1.2}
.case-metrics{display:flex;gap:20px;margin-top:6px;flex-wrap:wrap}
.case-metrics .m{font-family:var(--serif);font-size:22px;font-weight:900;color:var(--gold-soft)}
.case-metrics .m small{display:block;font-family:var(--sans);font-size:11.5px;color:var(--text-3);font-weight:400}

/* 数据条 */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:28px}
@media(max-width:680px){.stat-row{grid-template-columns:repeat(2,1fr)}}
.stat{padding:26px;text-align:center}

/* 警示框 */
.note{border-left:3px solid var(--gold);background:rgba(201,169,106,.07);padding:18px 22px;border-radius:0 12px 12px 0;color:var(--text-2);font-size:14.5px;font-weight:300}
.note b{color:var(--gold-soft);font-weight:700}

/* 进度条 */
.track{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.track .node{flex:1;min-width:120px;padding:13px 14px;border:1px solid var(--line-soft);border-radius:10px;font-size:13.5px;text-align:center;color:var(--text-2)}
.track .node.done{border-color:var(--gold);color:var(--gold-soft);background:rgba(201,169,106,.08)}

/* 主理人 */
.founder-grid{align-items:stretch}
.founder{display:flex;flex-direction:column;align-items:flex-start}
.founder-head{display:flex;gap:18px;align-items:center;margin-bottom:14px}
.founder-img{width:104px;height:104px;border-radius:50%;object-fit:cover;border:2px solid var(--line);flex-shrink:0;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.founder-id{min-width:0}
.founder h3{font-size:24px;line-height:1.2}
.founder-role{font-size:15px;color:var(--gold-soft);margin:4px 0 0}
.founder .muted{font-size:14.5px}
@media(max-width:600px){
  .founder-img{width:84px;height:84px}
  .founder h3{font-size:21px}
  .founder-role{font-size:14px}
}

/* 子页 hero 变体 */
.hero-cases{background-image:url('images/cases-bg.jpg')}

/* 居中与分割 */
.center{text-align:center}
.center .lead{margin:0 auto}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);margin:8px 0}