/* =========================================================
   橘创文化 ORANGEC — 官网样式
   主题：浅色 / 橘色主调 / 简洁有活力
   ========================================================= */

:root{
  --o1:#FF6A00;          /* 主橘 */
  --o2:#FF9330;          /* 亮橘 */
  --o3:#FFC79B;          /* 浅橘 */
  --o-soft:#FFF3E9;      /* 橘色浅底 */
  --o-line:#FFE0C8;
  --ink:#16192B;         /* 主文字 */
  --sub:#5C6274;         /* 次文字 */
  --muted:#8A8F9E;
  --bg:#FFFFFF;
  --bg2:#FFF9F4;
  --dark:#141726;
  --dark2:#1D2135;
  --line:#EFE8E2;
  --radius:20px;
  --radius-sm:14px;
  --shadow-sm:0 2px 10px rgba(22,25,43,.05);
  --shadow:0 14px 40px rgba(22,25,43,.08);
  --shadow-lg:0 26px 70px rgba(255,106,0,.16);
  --wrap:1180px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5{line-height:1.28;letter-spacing:-.01em;font-weight:800}
::selection{background:var(--o1);color:#fff}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s,background .22s,color .22s;
  white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--o1),var(--o2));color:#fff;box-shadow:0 10px 26px rgba(255,106,0,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,106,0,.36)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--o-line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--o1);color:var(--o1);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--o1)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.22)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-2px)}

/* ---------- 小标题 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--o1);text-transform:uppercase;margin-bottom:16px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--o1);box-shadow:0 0 0 4px rgba(255,106,0,.16)}
.eyebrow.center{justify-content:center;display:flex}
.eyebrow.on-dark{color:var(--o3)}
.eyebrow.on-dark .dot{background:var(--o2);box-shadow:0 0 0 4px rgba(255,147,48,.2)}

.hl{
  position:relative;color:var(--o1);z-index:1;white-space:nowrap;
}
.hl::after{
  content:"";position:absolute;left:-4px;right:-4px;bottom:6px;height:14px;
  background:linear-gradient(90deg,rgba(255,106,0,.22),rgba(255,147,48,.1));
  border-radius:6px;z-index:-1;
}

/* =========================================================
   顶部导航
   ========================================================= */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s,background .3s;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(22,25,43,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.brand{display:flex;align-items:center;gap:11px}
.brand-mark{width:38px;height:38px;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-text strong{font-size:18px;font-weight:800;letter-spacing:.02em}
.brand-text em{font-size:10.5px;font-style:normal;letter-spacing:.26em;color:var(--o1);font-weight:700}
.nav{display:flex;align-items:center;gap:6px}
.nav > a{padding:9px 14px;border-radius:999px;font-size:15px;font-weight:600;color:var(--sub);transition:color .2s,background .2s}
.nav > a:hover{color:var(--o1);background:var(--o-soft)}
.nav .nav-cta{color:#fff;padding:11px 22px;margin-left:8px}
.nav .nav-cta:hover{color:#fff;background:linear-gradient(135deg,var(--o1),var(--o2))}
.nav-toggle{
  display:none;width:44px;height:44px;border:0;background:transparent;border-radius:12px;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* =========================================================
   首屏
   ========================================================= */
.hero{position:relative;padding:150px 0 0;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5}
.blob-a{width:520px;height:520px;background:radial-gradient(circle,rgba(255,106,0,.35),transparent 65%);top:-160px;right:-100px;animation:drift 16s ease-in-out infinite}
.blob-b{width:460px;height:460px;background:radial-gradient(circle,rgba(255,180,90,.32),transparent 65%);top:120px;left:-180px;animation:drift 20s ease-in-out infinite reverse}
@keyframes drift{0%,100%{transform:translate(0,0)}50%{transform:translate(-30px,34px)}}
.grid-mask{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(22,25,43,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(22,25,43,.035) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 75%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center;
  padding-bottom:56px;
}
.hero-copy h1{font-size:clamp(34px,4.6vw,58px);font-weight:900;letter-spacing:-.02em;margin-bottom:20px}
.lede{font-size:17.5px;color:var(--sub);max-width:520px;margin-bottom:30px}
.lede strong{color:var(--ink);font-weight:700}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;list-style:none}
.hero-tags li{
  font-size:13.5px;font-weight:600;color:var(--sub);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;
}

.hero-visual{position:relative}
.hero-card{
  position:relative;border-radius:26px;overflow:hidden;
  box-shadow:var(--shadow-lg);border:6px solid #fff;background:#fff;
}
.hero-card img{width:100%;height:390px;object-fit:cover}
.hero-card figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:40px 22px 16px;
  color:#fff;font-size:13.5px;font-weight:600;letter-spacing:.02em;
  background:linear-gradient(to top,rgba(10,12,20,.72),transparent);
}
.float-card{
  position:absolute;background:#fff;border-radius:18px;padding:14px 20px;
  box-shadow:var(--shadow);border:1px solid var(--line);
  display:flex;flex-direction:column;align-items:flex-start;
  animation:floaty 5.5s ease-in-out infinite;
}
.float-card b{font-size:24px;font-weight:900;color:var(--o1);line-height:1.1}
.float-card b i{font-style:normal;font-size:14px;margin-left:1px}
.float-card span{font-size:12.5px;color:var(--muted);font-weight:600}
.float-1{left:-26px;top:44px}
.float-2{right:-18px;bottom:56px;animation-delay:1.4s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* 数据条 */
.stat-band{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--line);border-radius:24px;
  box-shadow:var(--shadow);overflow:hidden;
  margin:12px 0 0;
}
.stat{padding:26px 24px;border-right:1px solid var(--line);position:relative}
.stat:last-child{border-right:0}
.stat::before{
  content:"";position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--o1),var(--o2));
  transition:width .6s ease;
}
.stat.in::before{width:100%}
.stat b{display:flex;align-items:baseline;font-size:32px;font-weight:900;color:var(--ink);letter-spacing:-.02em}
.stat b i{font-style:normal;font-size:17px;color:var(--o1);margin-left:3px;font-weight:800}
.stat span{font-size:13.5px;color:var(--muted);font-weight:600}

/* =========================================================
   通用区块
   ========================================================= */
.section{padding:96px 0;position:relative}
.section-tint{background:var(--bg2)}
.section-dark{background:var(--dark);color:#fff}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-dark .sub,.section-dark p{color:rgba(255,255,255,.7)}
.mt-xl{margin-top:88px}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.grid-2.gap-lg{gap:64px}

.sec-head{max-width:800px;margin:0 auto 56px;text-align:center}
.sec-head h2{font-size:clamp(26px,3.2vw,38px);font-weight:900;letter-spacing:-.02em}
.sec-head .sub{margin-top:14px;color:var(--sub);font-size:16.5px}
.sub-inline{font-size:.62em;font-weight:600;color:var(--muted);letter-spacing:0}

.body{color:var(--sub);font-size:16.5px;margin-top:16px}
.body strong{color:var(--ink);font-weight:700}
.pill-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.pill{
  font-size:13.5px;font-weight:700;color:var(--o1);
  background:var(--o-soft);border:1px solid var(--o-line);border-radius:999px;padding:7px 16px;
}

.shot{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:#fff;border:1px solid var(--line)}
.shot img{width:100%;height:100%;object-fit:cover}
.shot-tall img{height:440px}
.shot figcaption{padding:12px 18px;font-size:13.5px;color:var(--muted);font-weight:600;background:#fff;border-top:1px solid var(--line)}
.shot-logo img{object-fit:contain;background:#fff;padding:26px 20px}

/* 服务四环节 */
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:72px}
.svc{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;position:relative;overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.7,.3,1),box-shadow .3s,border-color .3s;
}
.svc::after{
  content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,0,.13),transparent 70%);
  transition:transform .4s;
}
.svc:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--o-line)}
.svc:hover::after{transform:scale(1.4)}
.svc-no{font-size:13px;font-weight:900;color:var(--o1);letter-spacing:.14em}
.svc h3{font-size:20px;margin:10px 0 10px}
.svc p{font-size:14.6px;color:var(--sub)}

/* 校园场景 列表 */
.feature-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.feature-list li{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 18px;display:flex;align-items:center;gap:12px;
  transition:border-color .25s,transform .25s,box-shadow .25s;
}
.feature-list li::before{
  content:"";flex:0 0 9px;height:9px;border-radius:50%;
  background:linear-gradient(135deg,var(--o1),var(--o2));box-shadow:0 0 0 4px rgba(255,106,0,.13);
}
.feature-list li:hover{border-color:var(--o1);transform:translateX(4px);box-shadow:var(--shadow-sm)}
.fi{font-size:15px;font-weight:600}

/* 痛点 */
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pain{
  background:#fff;border:1px dashed #E4DAD2;border-radius:var(--radius-sm);
  padding:20px 18px;text-align:center;transition:.28s;
}
.pain span{font-size:14.6px;font-weight:600;color:var(--sub)}
.pain:hover{border-color:var(--o1);border-style:solid;background:var(--o-soft)}
.pain:hover span{color:var(--o1)}
.arrow-down{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  margin:34px 0;color:var(--o1);font-size:13.5px;font-weight:800;letter-spacing:.16em;
}
.arrow-down::after{
  content:"";width:0;height:0;
  border-left:8px solid transparent;border-right:8px solid transparent;border-top:11px solid var(--o1);
}
.solve{
  background:linear-gradient(135deg,#FFF3E9,#FFEAD8);
  border:1px solid var(--o-line);border-radius:24px;
  padding:38px 40px;display:flex;gap:34px;align-items:center;justify-content:space-between;flex-wrap:wrap;
  box-shadow:0 18px 50px rgba(255,106,0,.1);
}
.solve-main h3{font-size:24px;color:var(--o1);margin-bottom:10px}
.solve-main p{color:var(--sub);max-width:660px;font-size:16px}
.solve-tags{display:flex;gap:10px;flex-wrap:wrap}
.solve-tags span{
  background:#fff;color:var(--o1);font-weight:700;font-size:13.5px;
  padding:8px 16px;border-radius:999px;box-shadow:var(--shadow-sm);
}

/* 营销优势 */
.adv-grid{display:flex;flex-wrap:wrap;gap:20px;justify-content:center}
.adv{
  flex:1 1 calc(33.333% - 14px);max-width:calc(33.333% - 14px);
  background:var(--dark2);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);
  padding:32px 28px;transition:transform .3s cubic-bezier(.2,.7,.3,1),border-color .3s,background .3s;
}
.adv:hover{transform:translateY(-6px);border-color:rgba(255,147,48,.5);background:#22263D}
.adv-ico{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
  font-size:19px;font-weight:900;color:#fff;margin-bottom:18px;
  background:linear-gradient(135deg,var(--o1),var(--o2));box-shadow:0 10px 24px rgba(255,106,0,.3);
}
.adv h3{font-size:19px;margin-bottom:10px}
.adv p{font-size:14.6px;color:rgba(255,255,255,.66)}

.deep-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.deep{
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.09);
  border-radius:var(--radius-sm);padding:26px 22px;transition:.3s;
}
.deep:hover{background:rgba(255,147,48,.1);border-color:rgba(255,147,48,.45);transform:translateY(-5px)}
.deep-no{font-size:22px;font-weight:900;color:var(--o2);opacity:.55;letter-spacing:-.02em}
.deep h4{font-size:16.5px;margin:8px 0 8px}
.deep p{font-size:13.8px;color:rgba(255,255,255,.6);line-height:1.7}

/* 执行链路 */
.flow{
  display:flex;align-items:stretch;gap:0;flex-wrap:wrap;justify-content:center;
}
.flow-node{
  flex:1 1 170px;min-width:150px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:20px 16px;text-align:center;box-shadow:var(--shadow-sm);
  transition:transform .28s,box-shadow .28s,border-color .28s;
}
.flow-node:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--o-line)}
.flow-node b{display:block;font-size:16px;margin-bottom:5px}
.flow-node span{font-size:13px;color:var(--muted);font-weight:600}
.flow-brand{background:var(--o-soft);border-color:var(--o-line)}
.flow-core{
  background:linear-gradient(135deg,var(--o1),var(--o2));border-color:transparent;color:#fff;
  box-shadow:0 14px 34px rgba(255,106,0,.3);
}
.flow-core b{color:#fff}
.flow-core span{color:rgba(255,255,255,.85)}
.flow-arrow{
  flex:0 0 34px;display:grid;place-items:center;position:relative;
}
.flow-arrow::before{
  content:"";width:100%;height:2px;background:linear-gradient(90deg,var(--o-line),var(--o1),var(--o-line));
}
.flow-arrow::after{
  content:"";position:absolute;right:4px;width:0;height:0;
  border-top:5px solid transparent;border-bottom:5px solid transparent;border-left:8px solid var(--o1);
}
.flow-note{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:34px}
.note-col{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px}
.note-col h4{font-size:16px;color:var(--o1);margin-bottom:10px;letter-spacing:.02em}
.note-col p{font-size:14.8px;color:var(--sub)}
.note-col-active{background:var(--o-soft);border-color:var(--o-line)}
.note-col-active strong{color:var(--o1)}

/* 案例 */
.case-block + .case-block{margin-top:76px}
.case-head{margin-bottom:30px;position:relative;padding-left:0}
.case-idx{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:11px;
  background:linear-gradient(135deg,var(--o1),var(--o2));color:#fff;font-weight:900;font-size:15px;
  margin-bottom:12px;box-shadow:0 8px 20px rgba(255,106,0,.26);
}
.case-head h3{font-size:26px;font-weight:900}
.case-head p{color:var(--sub);font-size:15.4px;margin-top:6px}
.case-grid{display:grid;gap:22px}
.case-grid-4{grid-template-columns:repeat(4,1fr)}
.case-grid-3{grid-template-columns:repeat(3,1fr)}
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .34s cubic-bezier(.2,.7,.3,1),box-shadow .34s,border-color .34s;
}
.case-card:hover{transform:translateY(-7px);box-shadow:var(--shadow);border-color:var(--o-line)}
.case-card figure{overflow:hidden;background:var(--o-soft)}
.case-card figure img{width:100%;height:190px;object-fit:cover;transition:transform .6s cubic-bezier(.2,.7,.3,1)}
.case-card:hover figure img{transform:scale(1.06)}
.case-body{padding:22px 22px 24px;flex:1;display:flex;flex-direction:column}
.tag{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:.02em;
  color:var(--o1);background:var(--o-soft);border-radius:999px;padding:4px 12px;
  align-self:flex-start;margin-bottom:11px;
}
.case-body h4{font-size:17px;margin-bottom:8px}
.case-body p{font-size:14.4px;color:var(--sub)}
.case-body strong{color:var(--o1)}

/* 覆盖高校 */
.school-wrap{display:grid;gap:28px}
.school-group{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 34px;box-shadow:var(--shadow-sm)}
.school-group h4{display:flex;align-items:center;gap:11px;font-size:17px;margin-bottom:20px}
.school-group h4 i{width:22px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--o1),var(--o2))}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips span{
  font-size:14.2px;font-weight:600;color:var(--sub);
  background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:8px 15px;
  transition:.25s;
}
.chips span:hover{color:#fff;background:linear-gradient(135deg,var(--o1),var(--o2));border-color:transparent;transform:translateY(-2px)}

/* 合作伙伴 */
.quote{
  margin-top:36px;text-align:center;
  font-size:clamp(19px,2.3vw,26px);font-weight:800;color:var(--ink);letter-spacing:-.01em;
}
.quote p::before{content:"“";color:var(--o1);font-size:1.5em;line-height:0;vertical-align:-.28em;margin-right:2px}
.quote p::after{content:"”";color:var(--o1);font-size:1.5em;line-height:0;vertical-align:-.28em;margin-left:2px}

/* 合作备注 */
.rules{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:16px;counter-reset:r}
.rules li{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--o1);
  border-radius:var(--radius-sm);padding:22px 26px;counter-increment:r;
  transition:transform .28s,box-shadow .28s;
}
.rules li:hover{transform:translateX(5px);box-shadow:var(--shadow-sm)}
.rules li:nth-child(5){grid-column:1/-1}
.rules b{display:block;font-size:16px;margin-bottom:7px}
.rules b::before{content:counter(r) ". ";color:var(--o1)}
.rules span{font-size:14.6px;color:var(--sub)}

/* CTA */
.cta-section{padding-bottom:110px}
.cta-card{
  background:linear-gradient(135deg,#FF7A18 0%,#FF6A00 45%,#F25400 100%);
  border-radius:30px;padding:56px 60px;color:#fff;
  display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;
  box-shadow:0 30px 80px rgba(255,106,0,.28);position:relative;overflow:hidden;
}
.cta-card::before{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:rgba(255,255,255,.12);
}
.cta-card::after{
  content:"";position:absolute;left:-90px;bottom:-160px;width:340px;height:340px;border-radius:50%;
  background:rgba(255,255,255,.08);
}
.cta-left,.cta-right{position:relative;z-index:1}
.cta-left h2{font-size:clamp(24px,2.9vw,34px);font-weight:900;line-height:1.3;margin-bottom:16px}
.cta-left p{color:rgba(255,255,255,.9);font-size:16px;margin-bottom:28px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.contact-list{
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  border-radius:22px;padding:28px 30px;backdrop-filter:blur(6px);
}
.contact-list > div{display:flex;gap:16px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.24)}
.contact-list > div:last-child{border-bottom:0;padding-bottom:0}
.contact-list > div:first-child{padding-top:0}
.contact-list dt{flex:0 0 78px;font-size:13.5px;color:rgba(255,255,255,.78);font-weight:600}
.contact-list dd{font-size:15px;font-weight:700}
.contact-list dd a{border-bottom:1px solid rgba(255,255,255,.4);transition:.2s}
.contact-list dd a:hover{border-color:#fff}

/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:70px 0 0}
.footer-inner{display:grid;grid-template-columns:1.1fr 1.6fr;gap:56px;padding-bottom:52px}
.footer-logo{height:44px;width:auto;object-fit:contain;margin-bottom:20px}
.footer-brand p{font-size:14.6px;max-width:340px;line-height:1.85}
.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.footer-nav h5{color:#fff;font-size:14.5px;margin-bottom:16px;letter-spacing:.04em}
.footer-nav a,.footer-nav span{display:block;font-size:14.2px;color:rgba(255,255,255,.62);margin-bottom:10px;transition:color .2s}
.footer-nav a:hover{color:var(--o2)}
.footer-addr{line-height:1.7}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0}
.footer-bottom-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13.4px;color:rgba(255,255,255,.5)}
.footer-bottom-inner a:hover{color:var(--o2)}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:26px;width:46px;height:46px;border-radius:14px;border:0;
  background:linear-gradient(135deg,var(--o1),var(--o2));color:#fff;font-size:19px;font-weight:800;
  box-shadow:0 12px 28px rgba(255,106,0,.34);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(12px);transition:.3s;z-index:90;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{transform:translateY(-3px)}

/* 滚动动画：仅在 JS 可用时隐藏，保证无 JS 环境下内容依然可见 */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  .blob,.float-card{animation:none}
  html{scroll-behavior:auto}
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .lede{max-width:none}
  .hero-card img{height:320px}
  .float-1{left:12px}
  .float-2{right:12px}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .adv{flex-basis:calc(50% - 10px);max-width:calc(50% - 10px)}
  .deep-grid{grid-template-columns:repeat(3,1fr)}
  .case-grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr;gap:40px}
  .cta-card{grid-template-columns:1fr;gap:36px;padding:48px 40px}
}
@media (max-width:860px){
  .nav{
    position:fixed;top:74px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:2px;
    padding:14px 20px 22px;box-shadow:0 20px 40px rgba(22,25,43,.1);
    transform:translateY(-140%);transition:transform .34s cubic-bezier(.2,.7,.3,1);
    max-height:calc(100vh - 74px);overflow-y:auto;
  }
  .nav.open{transform:translateY(0)}
  .nav > a{padding:13px 16px;border-radius:12px;font-size:16px}
  .nav .nav-cta{margin:10px 0 0;justify-content:center}
  .nav-toggle{display:flex}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .grid-2{grid-template-columns:1fr;gap:38px}
  .grid-2.gap-lg{gap:38px}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .rules{grid-template-columns:1fr}
  .flow-note{grid-template-columns:1fr}
  /* 执行链路：窄屏改为纵向排列 */
  .flow{flex-direction:column;align-items:stretch}
  .flow-node{width:100%;flex:0 0 auto}
  .flow-arrow{flex:0 0 30px;width:100%;min-height:30px}
  .flow-arrow::before{width:2px;height:100%;margin:0 auto;background:linear-gradient(180deg,var(--o-line),var(--o1),var(--o-line))}
  .flow-arrow::after{
    left:50%;right:auto;bottom:1px;top:auto;transform:translateX(-50%);
    border:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:9px solid var(--o1);
  }
  .case-grid-3{grid-template-columns:repeat(2,1fr)}
  .section{padding:74px 0}
  .hero{padding-top:126px}
}
@media (max-width:620px){
  .wrap{padding:0 18px}
  .brand-text strong{font-size:16px}
  .hero{padding-top:112px}
  .hero-card img{height:230px}
  .float-card{padding:11px 15px}
  .float-card b{font-size:19px}
  .float-card span{font-size:11.4px}
  .stat{padding:20px 16px}
  .stat b{font-size:25px}
  .stat span{font-size:12px}
  .svc-grid{grid-template-columns:1fr}
  .adv{flex-basis:100%;max-width:100%}
  .deep-grid{grid-template-columns:1fr}
  .case-grid-4,.case-grid-3{grid-template-columns:1fr}
  .feature-list{grid-template-columns:1fr}
  .solve{padding:28px 24px}
  .school-group{padding:24px 20px}
  .cta-card{padding:36px 26px;border-radius:24px}
  .contact-list{padding:22px 20px}
  .contact-list > div{flex-direction:column;gap:3px}
  .contact-list dt{flex:none}
  .footer-nav{grid-template-columns:1fr 1fr;gap:22px}
  .case-head h3{font-size:22px}
  .to-top{right:16px;bottom:18px}
}