/* =========================================================
   约团网官网  ·  样式表
   配色：深墨蓝 + 暖橙，浅色底
   ========================================================= */

:root{
  --ink:#0C2438;
  --ink-2:#173A54;
  --ink-3:#21496A;
  --orange:#F26522;
  --orange-d:#D9500F;
  --orange-deep:#B03A06;
  --cta:#C7440A;
  --cta-d:#A83604;
  --orange-soft:#FFF0E7;
  --cream:#FAF7F3;
  --white:#ffffff;
  --line:#E8E1D8;
  --line-2:#DCD3C8;
  --body:#2C3A47;
  --muted:#5C6976;
  --radius:16px;
  --shadow-s:0 2px 8px rgba(12,36,56,.06);
  --shadow-m:0 12px 32px rgba(12,36,56,.10);
  --shadow-l:0 28px 70px rgba(12,36,56,.16);
  --max:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}

/* 键盘焦点可见 */
:focus-visible{outline:3px solid #D9500F;outline-offset:3px;}
.engine :focus-visible,.contact :focus-visible,.footer :focus-visible{outline-color:#FFB58F;}
a:focus-visible,button:focus-visible{border-radius:6px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}

body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.28;letter-spacing:-.01em;}
p{margin:0;}
ul,ol,dl{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
img,svg{max-width:100%;display:block;}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
.section{padding:104px 0;position:relative;}
.only-m{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .18s var(--ease),background .18s,box-shadow .18s,color .18s,border-color .18s;
  white-space:nowrap;
}
.btn-primary{background:var(--cta);color:#fff;box-shadow:0 8px 20px rgba(199,68,10,.26);}
.btn-primary:hover{background:var(--cta-d);transform:translateY(-1px);box-shadow:0 12px 26px rgba(168,54,4,.34);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2);}
.btn-ghost:hover{border-color:var(--ink);background:#fff;transform:translateY(-1px);}
.btn-lg{padding:16px 34px;font-size:16px;border-radius:12px;}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:8px;}
.btn-block{width:100%;}

/* ---------- 通用标题 ---------- */
.sec-head{max-width:720px;margin:0 auto 60px;text-align:center;}
.sec-head-left{margin-left:0;text-align:left;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--orange-deep);margin-bottom:16px;
}
.kicker::before{content:"";width:22px;height:2px;background:var(--orange);border-radius:2px;}
.kicker-light{color:#FFB58F;}
.kicker-light::before{background:#FFB58F;}
.sec-head h2{font-size:clamp(28px,3.4vw,42px);letter-spacing:-.02em;}
.sec-sub{margin-top:18px;color:var(--muted);font-size:16.5px;line-height:1.8;}

/* =========================================================
   导航
   ========================================================= */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .25s,box-shadow .25s,background .25s;
}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 4px 24px rgba(12,36,56,.06);background:rgba(255,255,255,.94);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:24px;}

.logo{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.logo-mark{
  width:40px;height:40px;border-radius:11px;flex-shrink:0;
  background:linear-gradient(145deg,#FF7F45,var(--orange) 60%,var(--orange-d));
  color:#fff;font-size:21px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(242,101,34,.28);
  line-height:1;
}
.logo-text{display:flex;flex-direction:column;line-height:1.18;}
.logo-text strong{font-size:18px;color:var(--ink);letter-spacing:.02em;}
.logo-text em{font-style:normal;font-size:10.5px;color:var(--muted);letter-spacing:.06em;}

.nav-links{display:flex;align-items:center;gap:30px;}
.nav-links>a:not(.btn){
  font-size:15px;color:var(--ink-2);font-weight:500;position:relative;padding:4px 0;
  transition:color .18s;
}
.nav-links>a:not(.btn)::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--orange);
  border-radius:2px;transition:width .22s var(--ease);
}
.nav-links>a:not(.btn):hover{color:var(--orange-deep);}
.nav-links>a:not(.btn):hover::after{width:100%;}
.nav-cta{margin-left:4px;}

.nav-toggle{display:none;width:42px;height:42px;border:0;background:transparent;padding:0;flex-direction:column;justify-content:center;gap:5px;}
.nav-toggle span{display:block;height:2px;width:22px;background:var(--ink);border-radius:2px;transition:transform .25s,opacity .2s;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* =========================================================
   首屏
   ========================================================= */
.hero{
  position:relative;padding:150px 0 0;
  background:linear-gradient(180deg,#FFFDFB 0%,#FAF7F3 62%,#F7F2EB 100%);
  overflow:hidden;
}
.hero-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden;}
.grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(12,36,56,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(12,36,56,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 26%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 26%,#000 0%,transparent 72%);
}
.glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;}
.glow-1{width:520px;height:520px;right:-120px;top:-140px;background:radial-gradient(circle,rgba(242,101,34,.28),transparent 68%);}
.glow-2{width:460px;height:460px;left:-160px;bottom:-120px;background:radial-gradient(circle,rgba(33,73,106,.20),transparent 68%);}

.hero-inner{
  position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:48px;
  align-items:center;padding-bottom:76px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  background:rgba(255,255,255,.75);border:1px solid var(--line);
  padding:7px 15px;border-radius:100px;
  font-size:13px;font-weight:600;color:var(--ink-2);letter-spacing:.02em;
  margin-bottom:24px;box-shadow:var(--shadow-s);
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:#35B37E;box-shadow:0 0 0 4px rgba(53,179,126,.16);}

.hero h1{font-size:clamp(30px,3.9vw,52px);line-height:1.22;letter-spacing:-.02em;}
.hero-sub{margin-top:24px;font-size:17.5px;color:#4A5A69;max-width:520px;line-height:1.85;}
.hero-sub b{color:var(--ink);font-weight:700;}

.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}

.hero-facts{display:flex;gap:38px;margin-top:46px;flex-wrap:wrap;padding-top:28px;border-top:1px solid var(--line-2);}
.hero-facts li{display:flex;flex-direction:column;}
.hero-facts strong{font-size:29px;font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.2;}
.hero-facts span{font-size:13px;color:var(--muted);letter-spacing:.02em;}
.hero-facts .unit{font-size:15px;margin-left:2px;}

/* ---------- 首屏视觉 ---------- */
.hero-visual{position:relative;height:520px;}

.phone{
  position:absolute;right:34px;top:14px;width:262px;height:492px;
  background:#0E2A3F;border-radius:34px;padding:9px;
  box-shadow:var(--shadow-l),0 0 0 1px rgba(255,255,255,.08) inset;
  transform:rotate(-2.2deg);
  animation:floatY 7s ease-in-out infinite;
}
@keyframes floatY{0%,100%{transform:rotate(-2.2deg) translateY(0);}50%{transform:rotate(-2.2deg) translateY(-9px);}}
.phone-top{display:flex;gap:4px;justify-content:center;padding:5px 0 8px;}
.phone-top i{width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.28);}
.phone-screen{background:#fff;border-radius:26px;height:calc(100% - 18px);overflow:hidden;padding:16px 14px;display:flex;flex-direction:column;gap:11px;}

.ps-head{display:flex;align-items:center;gap:9px;}
.ps-logo{width:30px;height:30px;border-radius:9px;background:linear-gradient(145deg,#FF7F45,var(--orange));color:#fff;font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.ps-name{font-size:12.5px;font-weight:700;color:var(--ink);line-height:1.3;}
.ps-tag{font-size:9.5px;color:var(--muted);line-height:1.3;}

.ps-banner{
  background:linear-gradient(120deg,#0E2A3F,#1E4A6B);
  border-radius:11px;padding:12px 13px;display:flex;flex-direction:column;gap:4px;
}
.ps-banner span{font-size:9.5px;color:rgba(255,255,255,.68);}
.ps-banner b{font-size:13.5px;color:#fff;}

.ps-actions{display:flex;gap:6px;}
.ps-actions span{
  flex:1;text-align:center;font-size:9.5px;font-weight:600;color:var(--ink-2);
  background:#F5F1EB;border-radius:7px;padding:8px 2px;
}
.ps-actions span:first-child{background:var(--orange-soft);color:var(--orange-d);}

.ps-list{display:flex;flex-direction:column;gap:7px;}
.ps-item{display:flex;align-items:center;gap:8px;}
.ps-item i{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,#EFE9E1,#E3DACF);flex-shrink:0;}
.ps-item span{flex:1;height:34px;border-radius:8px;background:linear-gradient(90deg,#F1ECE5,#F8F5F1);}

.ps-bar{
  margin-top:auto;display:flex;gap:8px;
  background:#0E2A3F;border-radius:11px;padding:11px;
}
.ps-bar span{flex:1;font-size:9.5px;color:rgba(255,255,255,.62);text-align:center;line-height:1.6;}
.ps-bar b{display:block;font-size:16px;color:#FFB58F;font-weight:800;}

/* AI 卡 */
.ai-card{
  position:absolute;left:0;top:96px;width:296px;
  background:#fff;border-radius:15px;padding:16px 17px;
  box-shadow:var(--shadow-m),0 0 0 1px var(--line);
  animation:floatY2 8s ease-in-out infinite;
}
@keyframes floatY2{0%,100%{transform:translateY(0);}50%{transform:translateY(-8px);}}
.ai-head{display:flex;align-items:center;gap:7px;font-size:10.5px;font-weight:700;color:var(--muted);letter-spacing:.04em;margin-bottom:10px;}
.ai-ico{
  width:20px;height:20px;border-radius:6px;background:linear-gradient(145deg,var(--ink-3),var(--ink));
  color:#fff;font-size:9px;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.ai-q{
  font-size:12.5px;color:var(--ink);background:#F6F3EF;border-radius:9px;
  padding:9px 11px;line-height:1.6;
}
.ai-a{margin-top:9px;border-left:2px solid var(--orange);padding-left:11px;}
.ai-badge{
  display:inline-block;font-size:9px;font-weight:800;color:#fff;background:var(--orange);
  padding:1px 7px;border-radius:4px;letter-spacing:.06em;margin-bottom:5px;
}
.ai-a p{font-size:11.5px;color:#4A5A69;line-height:1.65;}
.ai-a b{color:var(--ink);}

/* 浮标 */
.float-chip{
  position:absolute;display:flex;align-items:center;gap:6px;
  background:#fff;border-radius:100px;padding:8px 14px;
  font-size:11.5px;color:var(--muted);
  box-shadow:var(--shadow-m),0 0 0 1px var(--line);
  white-space:nowrap;
}
.float-chip b{font-size:13px;color:var(--orange-d);font-weight:800;}
.chip-1{right:0;bottom:74px;}
.chip-2{left:24px;bottom:8px;}

/* 首屏底部条 */
.hero-strip{border-top:1px solid var(--line-2);background:rgba(255,255,255,.55);}
.strip-inner{display:flex;align-items:center;gap:26px;padding:20px 24px;flex-wrap:wrap;}
.strip-inner>span{font-size:12.5px;color:var(--muted);letter-spacing:.06em;flex-shrink:0;}
.strip-inner ul{display:flex;gap:10px;flex-wrap:wrap;}
.strip-inner li{
  font-size:13px;font-weight:600;color:var(--ink-2);
  background:#fff;border:1px solid var(--line);border-radius:100px;padding:5px 14px;
}

/* =========================================================
   痛点
   ========================================================= */
.pain{background:#fff;}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.pain-card{
  position:relative;padding:30px 26px 26px;border-radius:var(--radius);
  background:var(--cream);border:1px solid #F1EBE3;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s;
}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);background:#fff;}
.pain-no{
  font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--orange-deep);
  display:block;margin-bottom:14px;
}
.pain-card h3{font-size:19px;margin-bottom:12px;}
.pain-card p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.pain-fix{
  margin-top:16px;padding-top:14px;border-top:1px dashed var(--line-2);
  font-size:13.5px !important;color:var(--ink-2) !important;font-weight:600;
}

/* =========================================================
   双引擎
   ========================================================= */
/* ---------- 双引擎：全站唯一的深色科技区 ---------- */
.engine{
  position:relative;isolation:isolate;overflow:hidden;color:#fff;
  background:
    radial-gradient(820px 460px at 14% -6%, rgba(242,101,34,.20), transparent 62%),
    radial-gradient(720px 420px at 92% 16%, rgba(33,88,133,.55), transparent 62%),
    linear-gradient(180deg,#081A28 0%,#0C2438 56%,#0A1E2E 100%);
}
/* 科技网格 */
.engine::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(ellipse 78% 66% at 50% 38%,#000 28%,transparent 76%);
  mask-image:radial-gradient(ellipse 78% 66% at 50% 38%,#000 28%,transparent 76%);
}
.engine>.wrap{position:relative;z-index:1;}

.engine .kicker{color:#FFB58F;}
.engine .kicker::before{background:#F26522;box-shadow:0 0 10px rgba(242,101,34,.9);}
.engine .sec-head h2{color:#fff;}
.engine .sec-sub{color:rgba(255,255,255,.68);}

.engine-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.eng-card{
  position:relative;overflow:hidden;border-radius:20px;padding:32px 26px 30px;
  background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.025));
  border:1px solid rgba(255,255,255,.12);
  box-shadow:0 26px 60px rgba(0,0,0,.38),inset 0 1px 0 rgba(255,255,255,.07);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  transition:transform .28s var(--ease),box-shadow .28s,border-color .28s;
}
.eng-card:hover{
  transform:translateY(-4px);border-color:rgba(242,101,34,.45);
  box-shadow:0 34px 74px rgba(0,0,0,.5),0 0 0 1px rgba(242,101,34,.22);
}
.eng-card::before{
  content:"";position:absolute;left:0;top:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,#F26522,#FFB58F,transparent);
}
.eng-b::before{background:linear-gradient(90deg,transparent,#3E8FC7,#9BD9FF,transparent);}
.eng-c::before{background:linear-gradient(90deg,transparent,#27AE8F,#8AE8CE,transparent);}
.eng-tag{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.1em;
  color:#FFC3A0;background:rgba(242,101,34,.16);
  border:1px solid rgba(242,101,34,.3);
  padding:4px 11px;border-radius:5px;margin-bottom:16px;
}
.eng-b .eng-tag{color:#A9DAFF;background:rgba(62,143,199,.16);border-color:rgba(62,143,199,.32);}
.eng-c .eng-tag{color:#8AE8CE;background:rgba(39,174,143,.16);border-color:rgba(39,174,143,.34);}
.eng-card h3{font-size:22px;margin-bottom:12px;color:#fff;}
.eng-lead{font-size:14.5px;color:rgba(255,255,255,.75);line-height:1.8;min-height:82px;}
.eng-lead strong{color:#fff;border-bottom:2px solid rgba(242,101,34,.55);}
.eng-list{margin-top:24px;display:flex;flex-direction:column;gap:0;}
.eng-list li{padding:14px 0;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;gap:4px;}
.eng-list b{font-size:14.5px;color:#fff;font-weight:700;}
.eng-list span{font-size:13px;color:rgba(255,255,255,.62);line-height:1.72;}
.eng-note{
  margin-top:22px;padding:13px 16px;border-radius:10px;
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.09);
  font-size:13.5px;color:rgba(255,255,255,.75);line-height:1.7;
}
.eng-note strong{color:#FFB58F;}

/* 闭环流程条 */
.flow{
  margin-top:44px;display:flex;align-items:stretch;gap:0;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.1);
  border-radius:16px;padding:26px 20px;overflow-x:auto;
}
.flow-step{
  flex:1;min-width:132px;text-align:center;padding:0 8px;
  display:flex;flex-direction:column;gap:6px;
}
.flow-step span{font-size:11.5px;color:rgba(255,255,255,.58);letter-spacing:.02em;}
.flow-step b{font-size:14.5px;color:#fff;}
.flow-arrow{
  width:22px;flex-shrink:0;align-self:center;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.14),rgba(242,101,34,.65));
  position:relative;
}
.flow-arrow::after{
  content:"";position:absolute;right:0;top:-3px;
  width:6px;height:6px;border-top:1px solid rgba(242,101,34,.9);border-right:1px solid rgba(242,101,34,.9);
  transform:rotate(45deg);
}

/* =========================================================
   行业方案
   ========================================================= */
.industries{background:#fff;}
.tabs{display:flex;gap:8px;margin-bottom:34px;flex-wrap:wrap;}
.tab{
  border:1px solid var(--line);background:#fff;color:var(--ink-2);
  padding:11px 30px;border-radius:100px;font-size:15px;font-weight:600;
  transition:all .2s var(--ease);
}
.tab:hover{border-color:var(--orange);color:var(--orange-d);}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink);box-shadow:0 8px 20px rgba(12,36,56,.18);}

.tab-panel{display:none;grid-template-columns:1.35fr .65fr;gap:36px;}
.tab-panel.active{display:grid;animation:fadeUp .45s var(--ease);}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}

.panel-copy h3{font-size:24px;margin-bottom:16px;}
.panel-quote{
  font-size:16px;color:var(--orange-d);font-weight:600;line-height:1.75;
  padding:14px 18px;background:var(--orange-soft);border-radius:10px;
  border-left:3px solid var(--orange);margin-bottom:26px;
}
.panel-block{margin-bottom:24px;}
.panel-block h4{font-size:14px;color:var(--ink);letter-spacing:.06em;margin-bottom:10px;font-weight:800;}
.panel-block p{font-size:15px;color:var(--muted);line-height:1.85;}
.tick{margin-bottom:6px;}
.tick li{
  position:relative;padding-left:26px;margin-bottom:10px;
  font-size:14.8px;color:#41505E;line-height:1.75;
}
.tick li::before{
  content:"";position:absolute;left:4px;top:9px;
  width:12px;height:7px;border-left:2px solid var(--orange);border-bottom:2px solid var(--orange);
  transform:rotate(-45deg);border-radius:1px;
}
.panel-metrics{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px;padding-top:22px;border-top:1px solid var(--line);}
.panel-metrics span{
  flex:1;min-width:120px;font-size:12.5px;color:var(--muted);line-height:1.6;
  background:var(--cream);border-radius:10px;padding:12px 14px;
}
.panel-metrics b{display:block;font-size:15px;color:var(--ink);margin-bottom:2px;}

.panel-side{display:flex;flex-direction:column;gap:16px;}
.side-card{
  border-radius:14px;padding:24px;background:var(--cream);border:1px solid #F1EBE3;
}
.side-title{
  font-size:11.5px;font-weight:800;letter-spacing:.1em;color:var(--orange-d);
  margin-bottom:10px;text-transform:uppercase;
}
.side-card p:last-child{font-size:14px;color:#4A5A69;line-height:1.8;}
.side-card-dark{background:linear-gradient(150deg,var(--ink),#1B4568);border-color:transparent;}
.side-card-dark .side-title{color:#FFB58F;}
.side-card-dark p:last-child{color:rgba(255,255,255,.86);}

/* =========================================================
   落地路径
   ========================================================= */
.path{background:linear-gradient(180deg,#FAF7F3,#F4EEE6);}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s;}
.step{
  background:#fff;border-radius:var(--radius);padding:28px 24px;
  border:1px solid var(--line);position:relative;
  transition:transform .25s var(--ease),box-shadow .25s;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);}
.step-no{font-size:11px;font-weight:800;letter-spacing:.14em;color:var(--orange-deep);}
.step h3{font-size:21px;margin:9px 0 4px;}
.step-time{font-size:12.5px;color:var(--muted);font-weight:600;margin-bottom:12px;}
.step p{font-size:14px;color:var(--muted);line-height:1.8;}
.step-out{
  margin-top:16px;padding-top:14px;border-top:1px dashed var(--line-2);
  font-size:13px !important;color:var(--ink-2) !important;font-weight:600;
}

/* =========================================================
   案例数据
   ========================================================= */
.cases{background:var(--ink);color:rgba(255,255,255,.82);overflow:hidden;}
.cases .kicker{color:#FFB58F;}
.cases .kicker::before{background:#FFB58F;}
.cases h2{color:#fff;}
.cases .sec-sub{color:rgba(255,255,255,.68);}

.stat-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(255,255,255,.12);border-radius:14px;overflow:hidden;
  margin-bottom:52px;
}
.stat{background:var(--ink);padding:28px 22px;text-align:center;}
.stat .num{display:block;font-size:40px;font-weight:800;color:#fff;letter-spacing:-.03em;line-height:1.1;}
.stat .num .suf{font-size:.46em;font-weight:600;color:rgba(255,255,255,.62);margin-left:3px;letter-spacing:0;vertical-align:2px;}
.stat span{display:block;font-size:13px;color:rgba(255,255,255,.6);margin-top:8px;}

.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.case-card{
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.12);
  border-radius:16px;padding:30px 28px;
  transition:background .25s,border-color .25s,transform .25s var(--ease);
}
.case-card:hover{background:rgba(255,255,255,.09);border-color:rgba(255,181,143,.45);transform:translateY(-3px);}
.case-tag{
  display:inline-block;font-size:11px;font-weight:800;letter-spacing:.1em;
  color:#FFB58F;background:rgba(242,101,34,.16);border:1px solid rgba(242,101,34,.3);
  padding:3px 10px;border-radius:5px;margin-bottom:14px;
}
.case-card h3{color:#fff;font-size:19px;margin-bottom:12px;line-height:1.5;}
.case-card p{font-size:14.2px;color:rgba(255,255,255,.72);line-height:1.85;}
.case-note{
  margin-top:14px;font-size:12.5px !important;color:rgba(255,181,143,.9) !important;
  padding-top:12px;border-top:1px solid rgba(255,255,255,.1);
}
.disclaimer{margin-top:26px;font-size:12.5px;color:rgba(255,255,255,.55);line-height:1.8;}

/* =========================================================
   案例现场（图片墙 + 实拍 + 视频）
   ========================================================= */
.gallery{background:#fff;}

.g-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.g-item{
  margin:0;background:#fff;border:1px solid var(--line);border-radius:14px;
  overflow:hidden;
  transition:transform .28s var(--ease),box-shadow .28s,border-color .28s;
}
.g-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);border-color:var(--line-2);}
.g-btn{
  display:block;width:100%;padding:0;border:0;background:#F3EEE7;
  position:relative;cursor:zoom-in;line-height:0;overflow:hidden;
}
.g-btn img{
  width:100%;height:clamp(180px,17vw,236px);object-fit:cover;object-position:center;display:block;background:#F3EEE7;
  transition:transform .55s var(--ease);
}
.g-item:hover .g-btn img{transform:scale(1.045);}
.g-tag{
  position:absolute;top:10px;left:10px;
  font-size:11px;font-weight:800;letter-spacing:.08em;color:#fff;
  background:rgba(12,36,56,.82);backdrop-filter:blur(6px);
  padding:4px 9px;border-radius:5px;line-height:1.4;
}
.g-item figcaption{padding:11px 13px 13px;font-size:12.5px;line-height:1.55;color:var(--ink-2);font-weight:600;}

/* 实拍 */

/* 视频 */

.g-note{
  margin-top:30px;font-size:12.5px;color:var(--muted);line-height:1.85;
  padding-left:14px;border-left:2px solid var(--line-2);
}

/* 灯箱 */
.lightbox{
  position:fixed;inset:0;z-index:200;background:rgba(6,18,28,.94);
  display:flex;align-items:center;justify-content:center;padding:44px 20px;
  animation:lbIn .22s ease;
}
@keyframes lbIn{from{opacity:0}to{opacity:1}}
.lightbox[hidden]{display:none;}
.lb-figure{margin:0;display:flex;flex-direction:column;align-items:center;max-width:min(94vw,760px);}
.lb-figure img{max-width:100%;max-height:76vh;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.55);}
#lbCap{margin-top:16px;color:rgba(255,255,255,.84);font-size:13.5px;text-align:center;line-height:1.7;}
.lb-close{
  position:absolute;top:18px;right:22px;width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);
  color:#fff;font-size:24px;line-height:1;transition:background .2s;
}
.lb-close:hover{background:rgba(255,255,255,.18);}
.lb-nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:46px;height:46px;border-radius:50%;
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);
  color:#fff;font-size:26px;line-height:1;transition:background .2s;
}
.lb-nav:hover{background:rgba(255,255,255,.18);}
.lb-prev{left:18px;}
.lb-next{right:18px;}
body.lb-open{overflow:hidden;}

/* =========================================================
   关于
   ========================================================= */
.about{background:#fff;}
.about-inner{display:grid;grid-template-columns:1.25fr .75fr;gap:56px;align-items:start;}
.about-copy h2{font-size:clamp(26px,3vw,38px);margin-bottom:24px;line-height:1.35;}
.about-copy p{font-size:15.5px;color:#4A5A69;line-height:1.95;margin-bottom:16px;}
.about-copy strong{color:var(--ink);font-weight:700;}

.about-points{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px;}
.about-points div{
  padding:18px;background:var(--cream);border-radius:12px;border:1px solid #F1EBE3;
}
.about-points b{display:block;font-size:15px;color:var(--ink);margin-bottom:6px;}
.about-points span{font-size:12.8px;color:var(--muted);line-height:1.7;}

.about-card{
  background:linear-gradient(160deg,#FAF7F3,#F3EDE4);
  border:1px solid var(--line);border-radius:18px;padding:30px 28px;
  position:sticky;top:96px;
}
.ac-title{font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--orange-d);margin-bottom:18px;}
.about-card dl{display:flex;flex-direction:column;}
.about-card dt{font-size:12px;color:var(--muted);letter-spacing:.04em;margin-top:14px;}
.about-card dt:first-child{margin-top:0;}
.about-card dd{margin:2px 0 0;font-size:14.5px;color:var(--ink);font-weight:600;line-height:1.6;}

/* =========================================================
   FAQ
   ========================================================= */
.faq{background:linear-gradient(180deg,#FAF7F3,#FFFDFB);}
.faq-wrap{max-width:900px;}
.faq-list{border-top:1px solid var(--line-2);}
.faq-item{border-bottom:1px solid var(--line-2);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;
  font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .18s;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--orange-d);}
.faq-item summary::after{
  content:"";position:absolute;right:8px;top:50%;
  width:9px;height:9px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);transition:transform .25s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--orange);}
.faq-item p{padding:0 44px 24px 0;font-size:14.8px;color:var(--muted);line-height:1.9;}

/* =========================================================
   联系
   ========================================================= */
.contact{
  background:linear-gradient(160deg,#0C2438,#17405F 60%,#0F3049);
  color:rgba(255,255,255,.78);overflow:hidden;position:relative;
}
.contact::before{
  content:"";position:absolute;right:-160px;top:-160px;width:520px;height:520px;
  border-radius:50%;background:radial-gradient(circle,rgba(242,101,34,.24),transparent 68%);
  filter:blur(60px);pointer-events:none;
}
.contact-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start;position:relative;}
.contact-copy h2{color:#fff;font-size:clamp(28px,3.2vw,42px);line-height:1.3;}
.contact-copy>p{margin-top:20px;font-size:15.5px;color:rgba(255,255,255,.72);line-height:1.9;max-width:460px;}

.contact-info{margin-top:38px;display:flex;flex-direction:column;gap:0;}
.ci-item{
  display:flex;align-items:baseline;gap:18px;padding:16px 0;
  border-top:1px solid rgba(255,255,255,.13);transition:padding-left .2s;
}
a.ci-item:hover{padding-left:6px;}
.ci-label{font-size:12.5px;color:rgba(255,255,255,.5);width:74px;flex-shrink:0;letter-spacing:.04em;}
.ci-value{font-size:16.5px;color:#fff;font-weight:600;letter-spacing:.01em;}

.contact-form{
  background:#fff;border-radius:18px;padding:32px 30px;
  box-shadow:var(--shadow-l);
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:7px;}
.field .opt{font-weight:400;color:var(--muted);}
.field input,.field select,.field textarea{
  width:100%;font-family:inherit;font-size:15px;color:var(--body);
  border:1px solid var(--line-2);border-radius:10px;background:#FCFAF8;
  padding:12px 14px;transition:border-color .18s,background .18s,box-shadow .18s;
  outline:none;
}
.field textarea{resize:vertical;min-height:82px;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--orange);background:#fff;box-shadow:0 0 0 4px rgba(242,101,34,.10);
}
.field.error input,.field.error select{border-color:#E24B4B;background:#FFF7F7;}
.field .err{display:none;font-size:12px;color:#E24B4B;margin-top:5px;}
.field.error .err{display:block;}
.contact-form .btn{margin-top:8px;padding:15px;font-size:16px;}
.form-tip{margin-top:13px;font-size:12px;color:var(--muted);text-align:center;line-height:1.7;}
.form-ok{
  margin-top:13px;padding:12px 14px;border-radius:10px;
  background:#EAF7F0;color:#187A4F;font-size:13.5px;font-weight:600;line-height:1.7;
}
.form-ok.form-fail{background:#FDEDEB;color:#A8231A;border:1px solid #F3C9C4;}

/* 深色区里的次级文字提亮，保证字幕可读 */
.engine .flow-step span{color:rgba(255,255,255,.62);}

/* =========================================================
   页脚
   ========================================================= */
.footer{background:#081A29;color:rgba(255,255,255,.55);padding:60px 0 26px;}
.footer-inner{display:flex;justify-content:space-between;gap:48px;flex-wrap:wrap;padding-bottom:44px;}
.f-brand{max-width:320px;}
.f-brand .logo-mark{box-shadow:none;}
.f-brand .logo-text strong{color:#fff;}
.f-brand .logo-text em{color:rgba(255,255,255,.42);}
.f-brand p{margin-top:16px;font-size:13.5px;line-height:1.8;}

.f-links{display:flex;gap:64px;flex-wrap:wrap;}
.f-links>div{display:flex;flex-direction:column;gap:9px;}
.f-title{font-size:12px;font-weight:800;letter-spacing:.12em;color:rgba(255,255,255,.85);margin-bottom:5px;}
.f-links a{font-size:13.5px;color:rgba(255,255,255,.5);transition:color .18s;}
.f-links a:hover{color:var(--orange);}

.f-bottom{
  display:flex;flex-direction:column;gap:7px;
  padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12.5px;color:rgba(255,255,255,.5);line-height:1.9;
}
.f-legal{display:flex;flex-wrap:wrap;align-items:center;gap:4px 9px;}
.f-legal a{
  color:rgba(255,255,255,.66);text-decoration:none;
  border-bottom:1px solid rgba(255,255,255,.24);padding-bottom:1px;
  transition:color .18s,border-color .18s;
}
.f-legal a:hover{color:#fff;border-color:var(--orange);}
.f-dot{color:rgba(255,255,255,.24);}
.f-legal-sub{font-size:11.5px;color:rgba(255,255,255,.44);}

/* 手机端底部转化条：打电话 + 免费诊断
   传统实体老板多数先打电话、再填表。表单端点没配的时候，这条就是唯一的转化口 */
.mbar{display:none;}
.mbar{
  position:fixed;left:0;right:0;bottom:0;z-index:95;
  gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom,0px));
  background:rgba(255,255,255,.97);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 22px rgba(12,36,56,.10);
}
.mbar a{
  flex:1;display:flex;align-items:center;justify-content:center;gap:7px;
  height:46px;border-radius:100px;font-size:15px;font-weight:700;
  text-decoration:none;letter-spacing:.01em;
}
.mbar-tel{background:#fff;color:var(--ink);border:1.5px solid var(--line-2);}
.mbar-cta{background:var(--cta);color:#fff;box-shadow:0 6px 16px rgba(199,68,10,.28);}
.mbar svg{width:17px;height:17px;flex:none;}
.mbar-cta svg{stroke:#fff;}

/* =========================================================
   滚动入场
   ========================================================= */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  .hero-inner{grid-template-columns:1fr;gap:56px;}
  .hero-visual{height:500px;max-width:520px;margin:0 auto;width:100%;}
  /* 三引擎在 1080 以下单列堆叠，避免卡片被挤到 260px 太窄 */
  .engine-grid{grid-template-columns:1fr;gap:18px;}
  .eng-lead{min-height:0;}
  .phone{right:50%;margin-right:-131px;}
  .ai-card{left:0;top:70px;width:280px;}
  .chip-1{right:0;}
  .pain-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .about-inner{grid-template-columns:1fr;gap:36px;}
  .about-card{position:static;}
  .contact-inner{grid-template-columns:1fr;gap:40px;}
  .tab-panel{grid-template-columns:1fr;}
  .g-grid{grid-template-columns:repeat(2,1fr);}
  }

@media (max-width:860px){
  .nav-links{
    position:fixed;top:70px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);
    padding:8px 24px 22px;
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .22s,transform .22s;box-shadow:0 18px 30px rgba(12,36,56,.1);
  }
  .nav-links.open{opacity:1;transform:none;pointer-events:auto;}
  .nav-links>a:not(.btn){padding:13px 0;border-bottom:1px solid #F4EFE8;font-size:16px;}
  .nav-links>a:not(.btn)::after{display:none;}
  .nav-cta{margin-top:14px;padding:13px;text-align:center;}
  .nav-toggle{display:flex;}

  .section{padding:76px 0;}
  .hero{padding-top:112px;}
  .hero-visual{height:470px;max-width:420px;}
  .only-m{display:block;}
  .sec-head h2 br.only-m{display:block;}
  .engine-grid{grid-template-columns:1fr;}
  .case-grid{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:repeat(2,1fr);}
  .about-points{grid-template-columns:1fr;}
  .flow{flex-direction:column;gap:0;padding:8px 20px;}
  .flow-step{flex-direction:row;align-items:center;gap:12px;padding:14px 0;text-align:left;min-width:0;border-bottom:1px solid #F2EDE6;}
  .flow-step:last-of-type{border-bottom:0;}
  .flow-step span{font-size:12px;order:2;margin-left:auto;text-align:right;}
  .flow-step b{font-size:15px;}
  .flow-arrow{display:none;}
  .mbar{display:flex;}
  .footer{padding-bottom:104px;}
  .footer-inner{gap:32px;}
  .f-links{gap:40px;}
      .lb-nav{width:40px;height:40px;font-size:22px;}
  .lb-prev{left:8px;}
  .lb-next{right:8px;}
}

@media (max-width:600px){
  .wrap{padding:0 18px;}
  .hero{padding-top:100px;}
  .hero h1{font-size:31px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions .btn{flex:1;padding:14px 18px;font-size:15px;}
  .hero-facts{gap:22px;}
  .hero-facts strong{font-size:23px;}
  .hero-facts span{font-size:11.5px;}
  .hero-visual{height:452px;}
  .phone{width:230px;height:432px;margin-right:-115px;right:50%;top:0;}
  .ai-card{width:246px;left:-6px;top:48px;padding:13px;}
  .chip-2{left:0;bottom:2px;}

  .pain-grid{grid-template-columns:1fr;gap:14px;}
  .steps{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:1fr 1fr;}
  .stat{padding:22px 12px;}
  .stat .num{font-size:31px;}
  .stat span{font-size:11.5px;}
  .eng-card{padding:28px 22px 24px;}
  .eng-lead{min-height:0;}
  .tabs{gap:6px;}
  .tab{flex:1;padding:10px 8px;font-size:14px;}
  .panel-copy h3{font-size:20px;}
  .contact-form{padding:24px 20px;}
  .ci-item{gap:12px;}
  .ci-value{font-size:15px;}
  .f-links{gap:28px;}
  .f-links>div{flex:1 0 40%;}
  .f-bottom{flex-direction:column;gap:6px;}
  .section{padding:64px 0;}
  .sec-head{margin-bottom:40px;}
  .g-grid{gap:10px;}
  .g-btn img{height:132px;}
  .g-item figcaption{padding:9px 10px 10px;font-size:11.5px;}
  .g-tag{top:8px;left:8px;font-size:10px;padding:3px 7px;}
    .g-note{font-size:12px;}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ---------- 深色科技区：手机端适配 ---------- */
@media (max-width:600px){
  .engine::before{background-size:38px 38px;}
  .eng-card{padding:26px 20px 24px;border-radius:16px;}
  .eng-card h3{font-size:21px;}
  .eng-lead{font-size:14.5px;min-height:0;}
  .eng-tag{font-size:11px;letter-spacing:.08em;}
  .eng-list b{font-size:14.5px;}
  .flow{padding:20px 14px;}
  .flow-step{min-width:118px;}
}