:root{
  --bg:#0f1012;
  --bg-top:#131417;
  --nav-bg:var(--nav-bg);
  --panel:#17181b;
  --panel2:#1e2024;
  --panel3:#21242b;
  --line:#2a2d32;
  --txt:#eceae6;
  --txt2:#a6a8ad;
  --txt3:#6e7177;
  --gold:#c9a55c;
  --gold-bright:#dfbd77;
  --gold-dim:rgba(201,165,92,.15);
  --acc-bd:var(--acc-bd);
  --acc-bd2:var(--acc-bd2);
  --acc-bd3:var(--acc-bd3);
  --acc-line:var(--acc-line);
  --glow1:var(--glow1);
  --glow2:var(--glow2);
  --navy:#3d5c94;
  --navy-deep:#1e3a6e;
  --radius:14px;
  --shadow:0 4px 24px rgba(0,0,0,.35);
}
/* ===== 橄榄绿主题（参考作品集配色） ===== */
[data-theme="olive"]{
  --bg:#60644d;
  --bg-top:#6b6f56;
  --nav-bg:rgba(88,92,70,.9);
  --panel:#696d52;
  --panel2:#737759;
  --panel3:#7a7e60;
  --line:rgba(242,238,222,.18);
  --txt:#f2eee0;
  --txt2:#d9d5c2;
  --txt3:#b0ac94;
  --gold:#e8954e;
  --gold-bright:#f4a95f;
  --gold-dim:rgba(232,149,78,.18);
  --acc-bd:rgba(232,149,78,.4);
  --acc-bd2:rgba(232,149,78,.55);
  --acc-bd3:rgba(232,149,78,.6);
  --acc-line:rgba(232,149,78,.45);
  --glow1:rgba(244,169,95,.08);
  --glow2:rgba(244,169,95,.1);
  --shadow:0 4px 24px rgba(35,38,24,.4);
}
/* 主题切换按钮 */
.theme-btn{
  width:34px;height:34px;border-radius:50%;cursor:pointer;flex:none;
  border:1px solid var(--acc-bd2);background:var(--gold-dim);
  display:flex;align-items:center;justify-content:center;font-size:15px;
  transition:transform .2s;margin-left:18px;
}
.theme-btn:hover{transform:rotate(20deg) scale(1.1)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);color:var(--txt);line-height:1.75;position:relative;
}
/* 全屏纸张纤维纹理（SVG turbulence + 横纵差异频率给纤维拉伸感） */
body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='320'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='turbulence' baseFrequency='0.018 0.55' numOctaves='5' seed='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)'/%3E%3C/svg%3E");
  opacity:.18;mix-blend-mode:overlay;
}
[data-theme="olive"] body::before{opacity:.38;mix-blend-mode:multiply}
body>*{position:relative;z-index:1}
a{text-decoration:none;color:inherit}
.container{max-width:1080px;margin:0 auto;padding:0 24px}

/* ===== 导航 ===== */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:var(--nav-bg);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:16px}
.logo img{height:40px;width:auto;display:block}
.logo small{display:block;font-size:11px;font-weight:400;color:var(--txt3);line-height:1.2}
.nav-links{display:flex;gap:26px;font-size:14px;color:var(--txt2);align-items:center}
.nav-links a{padding:6px 0;transition:color .2s}
.nav-links a:hover{color:var(--txt)}
.nav-links a.active{color:var(--gold-bright);border-bottom:2px solid var(--gold)}
.nav-cta{
  border:1px solid var(--acc-bd2);color:var(--gold-bright);
  padding:7px 18px;border-radius:8px;font-size:13.5px;transition:all .2s;
}
.nav-cta:hover{background:var(--gold-dim);color:var(--gold-bright)}
.menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px}
.menu-btn svg{width:24px;height:24px;stroke:var(--txt)}

/* ===== 页面头 ===== */
.page-hero{
  padding:150px 0 70px;
  background:
    radial-gradient(900px 380px at 80% -20%, var(--glow1), transparent 60%),
    linear-gradient(180deg,var(--bg-top),var(--bg));
  border-bottom:1px solid var(--line);
}
.page-hero .sec-num{font-size:12px;color:var(--gold);letter-spacing:3px;font-weight:700;display:block;margin-bottom:10px}
.page-hero h1{font-size:36px;line-height:1.3;margin-bottom:12px}
.page-hero p{color:var(--txt2);font-size:16px;max-width:680px}

/* ===== 首页 Hero ===== */
.hero{
  padding:130px 0 70px;
  background:
    radial-gradient(1000px 420px at 85% -10%, var(--glow2), transparent 60%),
    radial-gradient(700px 360px at -10% 110%, rgba(61,92,148,.08), transparent 60%),
    linear-gradient(180deg,var(--bg-top),var(--bg));
  border-bottom:1px solid var(--line);
  text-align:center;
}
.hero-tag{
  display:inline-block;font-size:13px;color:var(--txt2);
  border:1px solid var(--line);border-radius:999px;padding:6px 16px;margin-bottom:22px;
  background:var(--panel);
}
.hero-tag i{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--gold);margin-right:8px;vertical-align:1px}
.hero h1{font-size:44px;line-height:1.25;letter-spacing:1px;margin-bottom:16px}
.hero h1 .gold{color:var(--gold-bright)}
.hero p.lead{font-size:16.5px;color:var(--txt2);max-width:560px;margin:0 auto 30px}

/* ===== 2D SVG 卡通人物 ===== */
#mascot3d{
  width:340px;height:380px;max-width:82vw;margin:0 auto;cursor:pointer;
  touch-action:none;position:relative;overflow:hidden;
}
#mascot3d svg{display:block;width:100%;height:100%}
.mascot-wrap{margin:6px auto 4px;max-width:380px}
.mascot-hint{font-size:12.5px;color:var(--txt3);margin-top:2px}
.mascot-say{
  display:inline-block;margin-top:8px;font-size:14px;color:var(--gold-bright);
  background:var(--gold-dim);border:1px solid var(--acc-bd);
  padding:5px 16px;border-radius:999px;min-width:120px;
}
/* 浮动特效 */
.emoji-float{position:absolute;font-size:18px;pointer-events:none;animation:floatUp 1.6s ease-out forwards}
@keyframes floatUp{0%{opacity:0;transform:translateY(0) scale(.6)}20%{opacity:1;transform:translateY(-10px) scale(1.1)}100%{opacity:0;transform:translateY(-46px) scale(.8)}}
@keyframes zzz-float{0%{opacity:0;transform:translate(0,0)}30%{opacity:1}100%{opacity:0;transform:translate(14px,-26px)}}
.zzz{animation:zzz-float 2.2s ease-out infinite}
.zzz.z2{animation-delay:.7s}
.zzz.z3{animation-delay:1.4s}

.hero-btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:26px}
.btn{display:inline-block;padding:12px 30px;border-radius:10px;font-size:15px;transition:all .2s}
.btn-primary{background:var(--gold);color:#141310;font-weight:600}
.btn-primary:hover{background:var(--gold-bright);transform:translateY(-2px)}
.btn-ghost{border:1px solid #3a3d43;color:var(--txt2)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-bright)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:52px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;text-align:center}
.stat b{display:block;font-size:26px;color:var(--gold-bright);margin-bottom:2px;font-weight:700}
.stat span{font-size:13px;color:var(--txt3)}

/* ===== Section ===== */
section{padding:80px 0}
.sec-head{margin-bottom:44px}
.sec-head.center{text-align:center;max-width:680px;margin-left:auto;margin-right:auto}
.sec-num{font-size:12px;color:var(--gold);letter-spacing:3px;font-weight:700;display:block;margin-bottom:8px}
.sec-head h2{font-size:30px;line-height:1.3;margin-bottom:10px}
.sec-head h2::after{content:"";display:block;width:44px;height:3px;background:var(--gold);margin-top:14px;border-radius:2px}
.sec-head.center h2::after{margin-left:auto;margin-right:auto}
.sec-head p{color:var(--txt2);font-size:15.5px}

/* ===== 业务卡片 ===== */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.biz-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:all .25s;display:block;position:relative;overflow:hidden;
}
.biz-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--gold),transparent);opacity:0;transition:opacity .25s}
.biz-card:hover{transform:translateY(-5px);border-color:var(--acc-bd3);background:var(--panel2)}
.biz-card:hover::before{opacity:1}
.biz-icon{
  width:46px;height:46px;border-radius:12px;background:var(--gold-dim);
  border:1px solid var(--acc-bd);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.biz-icon svg{width:22px;height:22px;stroke:var(--gold-bright)}
.biz-card h3{font-size:18px;margin-bottom:10px}
.biz-card p{font-size:14px;color:var(--txt2);margin-bottom:16px}
.biz-card .more{font-size:13px;color:var(--gold);transition:color .2s}
.biz-card:hover .more{color:var(--gold-bright)}
.biz-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.biz-tags span{font-size:12px;color:var(--txt2);background:var(--panel2);border:1px solid var(--line);padding:3px 10px;border-radius:6px}

/* ===== 内容块通用 ===== */
.block{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;margin-bottom:16px}
.block h3{font-size:17px;margin-bottom:8px}
.block p{font-size:14px;color:var(--txt2)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.mini{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:22px 22px;border-top:2px solid var(--acc-line)}
.mini b{display:block;font-size:15px;margin-bottom:8px}
.mini p{font-size:13.5px;color:var(--txt2)}
.num-item{
  display:grid;grid-template-columns:52px 200px 1fr;gap:18px;align-items:start;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-bottom:14px;
}
.num-item .no{font-size:22px;font-weight:800;color:var(--gold)}
.num-item b{font-size:15px}
.num-item p{font-size:13.5px;color:var(--txt2)}
.banner{background:linear-gradient(135deg,var(--panel2),var(--panel3));border:1px solid var(--line);border-left:3px solid var(--gold);border-radius:var(--radius);padding:26px 30px;font-size:14.5px;color:var(--txt2)}
.banner b{font-size:17px;color:var(--txt);display:block;margin-bottom:6px}
.facts{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.fact{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.fact b{font-size:14px;display:block;margin-bottom:6px}
.fact b::before{content:"";display:inline-block;width:7px;height:7px;border-radius:2px;background:var(--gold);margin-right:8px}
.fact p{font-size:13px;color:var(--txt2)}
.credit-code{grid-column:1/-1;background:var(--panel2);border:1px solid var(--line);color:var(--txt3);font-size:13px;font-family:monospace}
.role-tag{font-size:12.5px;color:var(--gold);font-weight:700;letter-spacing:1px}
.tri-card{position:relative;overflow:hidden}
.tri-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--gold),var(--navy))}
.tri-card h3{font-size:18px;margin:4px 0 10px}
.flow{display:grid;grid-template-columns:repeat(4,1fr);background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.flow-step{padding:24px 22px}
.flow-step+.flow-step{border-left:1px dashed var(--line)}
.flow-step .no{font-size:12px;font-weight:800;color:var(--gold)}
.flow-step b{display:block;font-size:15px;margin:4px 0 4px}
.flow-step p{font-size:12.5px;color:var(--txt3)}
.road-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px}
.road-card h3{font-size:19px;margin-bottom:2px}
.road-card .period{font-size:12.5px;color:var(--gold);font-weight:700;margin-bottom:16px}
.road-card ul{list-style:none}
.road-card li{font-size:14px;color:var(--txt2);padding:9px 0 9px 22px;position:relative;border-bottom:1px dashed var(--line)}
.road-card li:last-child{border-bottom:none}
.road-card li::before{content:"";position:absolute;left:2px;top:16px;width:7px;height:7px;border-radius:50%;background:var(--gold)}
.road-card li b{color:var(--txt)}

/* ===== 联系条 ===== */
.contact-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--panel)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.contact-grid h2{font-size:26px;margin-bottom:8px}
.contact-grid .sec-p{color:var(--txt2);font-size:15px}
.contact-line{display:flex;gap:12px;align-items:center;margin-bottom:14px;font-size:14.5px}
.contact-line .ico{
  width:36px;height:36px;flex:none;border-radius:10px;background:var(--gold-dim);
  border:1px solid var(--acc-bd);display:flex;align-items:center;justify-content:center;
}
.contact-line .ico svg{width:17px;height:17px;stroke:var(--gold-bright)}
.contact-line b{display:block;font-size:11.5px;color:var(--txt3);font-weight:400;line-height:1.3}
.contact-box{background:var(--panel2);border:1px solid var(--acc-bd);border-radius:var(--radius);padding:36px 30px;text-align:center}
.contact-box h3{font-size:19px;margin-bottom:6px}
.contact-box p{font-size:13.5px;color:var(--txt2);margin-bottom:22px}

footer{border-top:1px solid var(--line);padding:30px 0;font-size:13px;color:var(--txt3);background:var(--bg)}
footer .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
footer b{color:var(--txt2);font-size:13.5px}

.reveal{opacity:0;transform:translateY(24px);transition:all .7s ease}
.reveal.on{opacity:1;transform:none}

@media (max-width:900px){
  .hero h1{font-size:31px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  section{padding:56px 0}
  .page-hero{padding:130px 0 50px}
  .page-hero h1{font-size:27px}
  .sec-head h2{font-size:24px}
  .grid-2,.grid-3,.grid-4,.biz-grid,.contact-grid{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr 1fr}
  .flow-step:nth-child(3){border-left:none;border-top:1px dashed var(--line)}
  .flow-step:nth-child(4){border-top:1px dashed var(--line)}
  .num-item{grid-template-columns:40px 1fr}
  .num-item p{grid-column:2}
  .nav-links{display:none}
  .menu-btn{display:block}
  .nav-links.open{
    display:flex;position:absolute;top:66px;left:0;right:0;
    background:var(--bg-top);flex-direction:column;align-items:stretch;gap:0;
    border-bottom:1px solid var(--line);padding:8px 0;box-shadow:0 10px 30px rgba(0,0,0,.5);
  }
  .nav-links.open a{padding:13px 24px}
  .nav-links.open .nav-cta{margin:8px 24px;text-align:center}
  .hero{padding:115px 0 55px}
}
@media (max-width:520px){
  .grid-4{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .flow-step+.flow-step{border-left:none;border-top:1px dashed var(--line)}
  .logo small{display:none}
}