/* ============================================================
   湖南青洱科技 · 获客系统 营销页样式
   品牌色：深青 #0B354E / 湖青 #12506E / 亮青 #3FCFB6 / 活力橙 #E24A1B
   ============================================================ */

:root{
  --navy:#0B354E;
  --navy-2:#12506E;
  --teal:#1A7A8C;
  --mint:#3FCFB6;
  --orange:#E24A1B;
  --ink:#12262F;
  --body:#4A5D67;
  --line:#E2EAEF;
  --bg:#FFFFFF;
  --bg-soft:#F5F9FB;
  --radius:16px;
  --shadow:0 10px 30px rgba(11,53,78,.08);
  --shadow-lg:0 24px 60px rgba(11,53,78,.16);
  --wrap:1200px;
}

*{box-sizing:border-box}
/* 作者样式里的 display 会盖掉 hidden 属性，这里统一兜底 */
[hidden]{display:none !important}
html{scroll-behavior:smooth;scroll-padding-top:76px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5{color:var(--ink);font-weight:700;line-height:1.3;margin:0}
p{margin:0}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.hl{color:var(--mint)}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;border:1.5px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--mint);color:#05282B;box-shadow:0 8px 22px rgba(63,207,182,.32)}
.btn-primary:hover{background:#57E0C8}
.btn-accent{background:var(--orange);color:#fff;box-shadow:0 8px 22px rgba(226,74,27,.3)}
.btn-accent:hover{background:#F2591F}
.btn-line{border-color:rgba(255,255,255,.4);color:#fff}
.btn-line:hover{border-color:#fff;background:rgba(255,255,255,.09)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--mint);color:var(--navy)}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-block{display:flex;width:100%}
.btn .arw{transition:transform .2s}
.btn:hover .arw{transform:translateX(4px)}

/* ---------------- 导航 ---------------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.86);backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;transition:.25s;
}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(11,53,78,.07)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:11px}
.brand-mark{display:block;flex:0 0 auto}
.brand-txt{display:flex;flex-direction:column;line-height:1.25}
.brand-txt strong{font-size:17px;color:var(--navy);letter-spacing:.4px}
.brand-txt em{font-style:normal;font-size:11px;color:#8AA0AC;letter-spacing:1.4px}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links>a{font-size:15px;color:#3B4E58;font-weight:500;position:relative;padding:4px 0}
.nav-links>a:not(.btn)::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--mint);transition:right .25s;
}
.nav-links>a:not(.btn):hover{color:var(--navy)}
.nav-links>a:not(.btn):hover::after{right:0}
.nav-cta{margin-left:6px}
.nav-burger{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:11px;flex-direction:column;gap:4px;align-items:center;justify-content:center;cursor:pointer}
.nav-burger span{display:block;width:18px;height:2px;background:var(--navy);border-radius:2px;transition:.2s}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------------- 首屏 ---------------- */
.hero{position:relative;padding:140px 0 64px;overflow:hidden;background:var(--navy);color:#C9DCE6}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 460px at 12% 8%, rgba(63,207,182,.20), transparent 62%),
    radial-gradient(700px 420px at 88% 82%, rgba(226,74,27,.16), transparent 60%),
    linear-gradient(160deg,#0B354E 0%,#0E4260 52%,#0B354E 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;opacity:.30;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent);
  mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent);
}
.hero-in{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:9px;padding:7px 16px;border-radius:999px;
  background:rgba(63,207,182,.12);border:1px solid rgba(63,207,182,.34);
  color:#8FF0DF;font-size:13.5px;letter-spacing:.3px;margin-bottom:26px;
}
.hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 0 rgba(63,207,182,.7);animation:pulse 2.2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(63,207,182,0)}100%{box-shadow:0 0 0 0 rgba(63,207,182,0)}}
.hero h1{font-size:clamp(38px,5vw,60px);color:#fff;letter-spacing:-.5px;line-height:1.2}
.hero-lead{margin-top:22px;font-size:17px;line-height:1.95;color:#B8CFDC;max-width:640px}
.hero-lead strong{color:#fff;font-weight:600}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-points{list-style:none;padding:0;margin:34px 0 0;display:flex;flex-wrap:wrap;gap:12px 28px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14.5px;color:#9FBACB}
.hero-points i{
  width:19px;height:19px;border-radius:50%;background:rgba(63,207,182,.18);color:var(--mint);
  display:grid;place-items:center;font-size:11px;font-style:normal;flex:0 0 auto;
}

/* 视频卡片 */
.hero-media{display:flex;flex-direction:column;align-items:center;gap:14px}
.video-card{
  position:relative;width:100%;max-width:560px;aspect-ratio:16/9;
  border-radius:26px;overflow:hidden;background:#061E2C;
  box-shadow:0 30px 70px rgba(0,0,0,.45), 0 0 0 1px rgba(255,255,255,.10);
}
.video-card video{width:100%;height:100%;object-fit:cover}
.video-play{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:linear-gradient(180deg,rgba(6,30,44,.25),rgba(6,30,44,.75));
  border:0;cursor:pointer;color:#fff;font-family:inherit;transition:opacity .3s;
}
.video-play.hide{opacity:0;pointer-events:none}
.play-ico{
  width:70px;height:70px;border-radius:50%;display:grid;place-items:center;padding-left:4px;
  background:rgba(255,255,255,.16);border:2px solid rgba(255,255,255,.65);
  backdrop-filter:blur(6px);transition:.2s;
}
.video-play:hover .play-ico{transform:scale(1.08);background:var(--mint);color:#05282B;border-color:var(--mint)}
.play-txt{text-align:center;font-size:16px;font-weight:600;text-shadow:0 2px 8px rgba(0,0,0,.5)}
.play-txt em{font-style:normal;font-size:12.5px;font-weight:400;opacity:.82}
.video-cap{
  position:absolute;left:0;right:0;bottom:0;padding:14px 16px;
  display:flex;flex-direction:column;gap:6px;
  background:linear-gradient(transparent,rgba(4,20,30,.88));
  font-size:13px;color:#DCE9F1;pointer-events:none;
}
.video-cap .live{display:flex;align-items:center;gap:7px;font-size:12px;letter-spacing:1px;color:#8FF0DF}
.video-cap .live b{width:7px;height:7px;border-radius:50%;background:var(--orange);animation:pulse 1.8s infinite}
.video-cap .vtime{font-size:12.5px;opacity:.85}
.video-note{font-size:12.5px;color:#7E9BAD;letter-spacing:.5px}
.video-card.playing .video-cap{opacity:0;transition:.3s}

/* 指标条 */
.metrics{
  position:relative;margin-top:56px;display:grid;grid-template-columns:repeat(5,1fr);
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.12);
  border-radius:18px;backdrop-filter:blur(8px);overflow:hidden;
}
.metric{padding:24px 20px;text-align:center;border-right:1px solid rgba(255,255,255,.10)}
.metric:last-child{border-right:0}
.metric b{display:block;font-size:32px;color:#fff;font-weight:700;letter-spacing:-.5px;font-variant-numeric:tabular-nums}
.metric span{display:block;font-size:13px;color:#93AEC0;margin-top:5px;line-height:1.5}

/* ---------------- 通用 section ---------------- */
.section{padding:92px 0;position:relative}
.section.alt{background:var(--bg-soft)}
.sec-head{max-width:780px;margin-bottom:52px}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:3px;color:var(--teal);
  font-weight:700;margin-bottom:14px;
}
.eyebrow.light{color:var(--mint)}
.sec-head h2{font-size:clamp(28px,3.4vw,40px);letter-spacing:-.4px}
.sec-head p{margin-top:16px;font-size:16.5px;color:var(--body);line-height:1.9}

.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ---------------- 卡片 ---------------- */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px 28px;transition:.25s;position:relative;overflow:hidden;
}
.card::before{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--mint),var(--teal));transition:width .35s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.card:hover::before{width:100%}
.card-ico{
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,#E8F8F5,#D6F1EC);color:var(--teal);margin-bottom:20px;
}
.card-ico svg{width:26px;height:26px}
.card h3{font-size:19.5px;margin-bottom:12px}
.card p{font-size:15px;line-height:1.85;color:#5B6E78}
.card p strong{color:var(--navy)}
.ticks{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-direction:column;gap:9px}
.ticks li{position:relative;padding-left:24px;font-size:14.3px;color:#5B6E78;line-height:1.65}
.ticks li::before{
  content:"✓";position:absolute;left:0;top:0;width:17px;height:17px;border-radius:50%;
  background:rgba(63,207,182,.16);color:#0E9C86;font-size:11px;display:grid;place-items:center;font-weight:700;
}

/* ---------------- 协议条 ---------------- */
.proto-strip{background:linear-gradient(100deg,var(--navy) 0%,#10496A 60%,#12627A 100%);padding:56px 0;color:#C9DCE6}
.proto-in{display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:center}
.proto-txt h3{color:#fff;font-size:24px;margin-bottom:12px}
.proto-txt p{font-size:15.5px;color:#A9C3D2;line-height:1.85}
.proto-chips{display:flex;flex-wrap:wrap;gap:12px}
.chip{
  padding:10px 20px;border-radius:999px;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.2);color:#EAF6FA;font-size:14.5px;font-weight:500;
  font-family:"SF Mono",Consolas,monospace;letter-spacing:.4px;transition:.2s;
}
.chip:hover{background:rgba(63,207,182,.2);border-color:var(--mint);transform:translateY(-3px)}

/* ---------------- 案例 ---------------- */
.cases{margin-bottom:32px}
.case{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;position:relative;transition:.25s;overflow:hidden;
}
.case:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:transparent}
.case-hot{background:linear-gradient(135deg,#0B354E,#134E6B);border-color:transparent}
.case-hot h3{color:#fff}
.case-hot p{color:#B4CDDB}
.case-flag{
  position:absolute;top:0;right:0;padding:7px 18px;background:var(--orange);color:#fff;
  font-size:12.5px;font-weight:600;border-bottom-left-radius:14px;letter-spacing:.5px;
}
.case-ind{display:block;font-size:13px;color:var(--teal);font-weight:600;letter-spacing:.6px;margin-bottom:9px}
.case-hot .case-ind{color:var(--mint)}
.case h3{font-size:21px;margin-bottom:12px;padding-right:70px}
.case p{font-size:15px;line-height:1.85}
.case-tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:18px 0 0}
.case-tags li{
  font-size:12.5px;padding:5px 12px;border-radius:6px;background:#EEF6F8;color:var(--teal);font-weight:500;
}
.case-hot .case-tags li{background:rgba(255,255,255,.12);color:#CFE9E4}

/* 冷库详情 */
.case-detail{
  display:grid;grid-template-columns:1fr 1.15fr;gap:40px;
  background:linear-gradient(135deg,#0E4260,#0B354E 70%);border-radius:22px;padding:44px;color:#B8CFDC;
  box-shadow:var(--shadow-lg);
}
.cd-left h3{color:#fff;font-size:27px;line-height:1.4;margin-bottom:16px}
.cd-left h3 span{font-size:17px;color:var(--mint);font-weight:500}
.cd-left p{font-size:15.5px;line-height:1.9}
.cd-stats{display:flex;gap:34px;margin-top:32px;flex-wrap:wrap}
.cd-stats b{display:block;font-size:38px;color:#fff;font-weight:700;line-height:1}
.cd-stats span{font-size:13px;color:#93AEC0}
.cd-right{display:flex;flex-direction:column;gap:16px}
.cd-block{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:20px 22px}
.cd-block h4{color:#fff;font-size:15.5px;margin-bottom:10px;letter-spacing:.5px}
.cd-block ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.cd-block li{position:relative;padding-left:18px;font-size:14.5px;line-height:1.7}
.cd-block li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--mint)}
.cd-block.ok{background:rgba(63,207,182,.12);border-color:rgba(63,207,182,.32)}
.cd-block.ok p{color:#8FF0DF;font-size:15px}

/* ---------------- 分层架构 ---------------- */
.layers{display:flex;flex-direction:column;gap:10px;margin-bottom:36px}
.layer{
  display:grid;grid-template-columns:74px 120px 1fr;align-items:center;gap:18px;
  background:var(--lv);color:#fff;padding:17px 24px;border-radius:12px;
  transition:transform .2s, filter .2s;
}
.layer:hover{transform:translateX(8px);filter:brightness(1.12)}
.layer b{font-size:19px;font-weight:700;opacity:.75;letter-spacing:1px}
.layer strong{font-size:17px;letter-spacing:2px}
.layer span{font-size:14.5px;opacity:.9}
.layer-note{
  font-size:13.5px;color:#7C93A0;text-align:center;padding:14px 18px;
  background:#EEF4F7;border-radius:10px;line-height:1.8;
}
.mini-cards{gap:20px}
.mini{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 20px;transition:.22s}
.mini:hover{border-color:var(--mint);transform:translateY(-4px);box-shadow:var(--shadow)}
.mini b{display:block;color:var(--navy);font-size:17px;margin-bottom:8px}
.mini p{font-size:14px;line-height:1.75}

/* ---------------- 为什么选我们 ---------------- */
.why-grid{gap:22px}
.why{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px 24px;transition:.25s}
.why:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.wn{
  display:block;font-size:34px;font-weight:800;color:#DCE9EF;line-height:1;margin-bottom:14px;
  font-family:Georgia,serif;letter-spacing:-1px;transition:.25s;
}
.why:hover .wn{color:var(--mint)}
.why h3{font-size:19px;margin-bottom:10px}
.why p{font-size:14.6px;line-height:1.85}

.flow{margin-top:52px;background:var(--navy);border-radius:22px;padding:40px 36px;color:#B8CFDC}
.flow-title{color:#fff;font-size:21px;margin-bottom:26px}
.steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:14px;padding:0;margin:0;counter-reset:s}
.steps li{
  position:relative;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);
  border-radius:13px;padding:20px 16px;text-align:center;counter-increment:s;transition:.22s;
}
.steps li:hover{background:rgba(63,207,182,.14);border-color:var(--mint);transform:translateY(-5px)}
.steps li::before{
  content:counter(s,decimal-leading-zero);display:block;font-size:13px;color:var(--mint);
  letter-spacing:2px;margin-bottom:9px;font-weight:700;
}
.steps li:not(:last-child)::after{
  content:"›";position:absolute;right:-13px;top:50%;transform:translateY(-50%);
  color:rgba(255,255,255,.35);font-size:22px;z-index:2;
}
.steps b{display:block;color:#fff;font-size:16.5px;margin-bottom:6px}
.steps span{font-size:13px;color:#93AEC0;line-height:1.6;display:block}
.flow-note{margin-top:24px;font-size:14px;color:#8FA9BA;text-align:center}

/* ---------------- 关于我们 ---------------- */
.about-in{display:grid;grid-template-columns:1.35fr .65fr;gap:52px;align-items:start}
.about-copy h2{font-size:clamp(26px,3vw,36px);margin-bottom:14px}
.about-lead{color:var(--teal);font-weight:600;font-size:16px;margin-bottom:18px}
.about-copy>p:not(.about-lead){font-size:15.8px;line-height:1.95}
.about-list{list-style:none;padding:0;margin:24px 0 0;display:flex;flex-direction:column;gap:12px}
.about-list li{position:relative;padding-left:20px;font-size:15px;line-height:1.8}
.about-list li::before{content:"";position:absolute;left:0;top:12px;width:7px;height:7px;border-radius:2px;background:var(--mint)}
.about-list b{color:var(--navy)}
.dept{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.dep{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:18px 16px;transition:.2s}
.dep:hover{border-color:var(--mint);background:#fff;box-shadow:var(--shadow)}
.dep b{display:block;color:var(--navy);font-size:15.5px;margin-bottom:7px}
.dep span{font-size:13.4px;line-height:1.7;color:#667982}
.side-card{background:linear-gradient(150deg,#0B354E,#134E6B);border-radius:20px;padding:32px 28px;color:#B8CFDC;box-shadow:var(--shadow-lg)}
.side-card h4{color:#fff;font-size:19px;margin-bottom:18px}
.side-card ul{list-style:none;padding:0;margin:0 0 26px;display:flex;flex-direction:column;gap:12px}
.side-card li{position:relative;padding-left:24px;font-size:14.6px;line-height:1.7}
.side-card li::before{
  content:"›";position:absolute;left:0;top:0;color:var(--mint);font-size:18px;font-weight:700;
}

/* ---------------- 表单 ---------------- */
.contact{background:linear-gradient(150deg,#0A2F46 0%,#0B354E 45%,#114C6A 100%);color:#B8CFDC;overflow:hidden;position:relative}
.contact::before{
  content:"";position:absolute;width:640px;height:640px;right:-180px;top:-200px;border-radius:50%;
  background:radial-gradient(circle,rgba(63,207,182,.20),transparent 65%);
}
.contact-in{position:relative;display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.contact-copy h2{color:#fff;font-size:clamp(30px,3.6vw,42px);margin-bottom:16px}
.contact-copy>p{font-size:16.5px;line-height:1.95}
.c-list{list-style:none;padding:0;margin:30px 0 0;display:flex;flex-direction:column;gap:16px}
.c-list li{display:grid;grid-template-columns:52px 1fr;gap:14px;font-size:14.8px;line-height:1.75;align-items:start}
.c-list b{
  background:rgba(63,207,182,.16);color:var(--mint);border-radius:7px;padding:3px 0;
  text-align:center;font-size:13px;letter-spacing:1px;
}
.c-note{margin-top:28px;padding:14px 18px;background:rgba(255,255,255,.06);border-left:3px solid var(--mint);border-radius:0 9px 9px 0;font-size:13.5px;color:#9FBACB}

.lead-form{background:#fff;border-radius:22px;padding:34px 32px;box-shadow:0 30px 70px rgba(0,0,0,.32)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.f-field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.f-field>span{font-size:14px;color:var(--ink);font-weight:600}
.f-field>span em{color:var(--orange);font-style:normal}
.f-field input,.f-field select,.f-field textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;
  font-size:15px;font-family:inherit;color:var(--ink);background:#FBFDFE;
  transition:.18s;outline:none;
}
.f-field textarea{resize:vertical;min-height:104px;line-height:1.7}
.f-field input:focus,.f-field select:focus,.f-field textarea:focus{
  border-color:var(--mint);background:#fff;box-shadow:0 0 0 4px rgba(63,207,182,.14);
}
.f-field input::placeholder,.f-field textarea::placeholder{color:#9BAEB8}
.f-field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234A5D67' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
.f-field.err input,.f-field.err select,.f-field.err textarea{border-color:#E05C3E;background:#FFF7F5}
.f-quick{display:flex;flex-wrap:wrap;gap:9px;margin:-4px 0 20px}
.f-quick button{
  padding:7px 14px;font-size:13px;border-radius:999px;border:1.5px solid var(--line);
  background:#fff;color:#5B6E78;cursor:pointer;font-family:inherit;transition:.18s;
}
.f-quick button:hover{border-color:var(--mint);color:var(--navy)}
.f-quick button.on{background:var(--navy);border-color:var(--navy);color:#fff}
.f-error{
  background:#FFF3EF;border:1.5px solid #F4C3B2;color:#C1400F;border-radius:10px;
  padding:11px 15px;font-size:14.2px;margin-bottom:16px;
}
.f-ok{
  background:#EDFBF7;border:1.5px solid #A8E9DC;color:#0B7A67;border-radius:10px;
  padding:14px 16px;font-size:14.6px;margin-bottom:16px;line-height:1.7;
}
.f-ok b{display:block;font-size:16.5px;margin-bottom:4px;color:#08614F}
.f-tip{text-align:center;font-size:12.6px;color:#94A6B0;margin-top:14px}

/* ---------------- 页脚 ---------------- */
.foot{background:#08283B;color:#8FA9BA}
.foot-in{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:38px;padding:58px 24px 44px}
.foot .brand-txt strong{color:#fff}
.foot-brand p{margin-top:16px;font-size:15px;color:#7E9BAD}
.foot-col h5{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.5px}
.foot-col a{display:block;font-size:14.3px;padding:5px 0;transition:.18s}
.foot-col a:hover{color:var(--mint);transform:translateX(4px)}
.foot-contact p{font-size:14.3px;line-height:1.85;margin-bottom:10px}
.foot-contact .muted{color:#6B8698;font-size:13.5px}
.foot-bar{border-top:1px solid rgba(255,255,255,.09);padding:18px 0}
.foot-bar .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#6B8698}

/* 联系方式补充：电话 / 微信二维码 / 备案号 */
.foot-in{grid-template-columns:1.4fr 1fr 1fr 1.1fr auto}
.foot-tel{color:var(--mint);font-size:16.5px;font-weight:700;letter-spacing:.4px;text-decoration:none}
.foot-tel:hover{color:#5FE6CE}
.foot-qr .qr-img{display:block;width:140px;height:140px;object-fit:contain;background:#fff;border-radius:12px;padding:7px;box-shadow:0 8px 20px rgba(0,0,0,.28)}
.foot-qr .qr-miss{width:140px;min-height:140px;display:flex;align-items:center;justify-content:center;text-align:center;
  border:1.5px dashed rgba(255,255,255,.28);border-radius:12px;padding:12px;font-size:12.5px;line-height:1.6;color:#7E9BAD}
.foot-qr .qr-miss code{display:block;margin-top:6px;font-size:11px;color:#5FE6CE;word-break:break-all}
.foot-bar a{color:#6B8698;text-decoration:none;border-bottom:1px dotted rgba(107,134,152,.5)}
.foot-bar a:hover{color:var(--mint);border-bottom-color:var(--mint)}
.c-list a{color:var(--mint);font-weight:700;text-decoration:none}
.c-list a:hover{text-decoration:underline}

/* ---------------- 悬浮按钮 ---------------- */
.float-cta{
  position:fixed;right:22px;bottom:26px;z-index:55;display:flex;flex-direction:column;align-items:center;gap:4px;
  background:var(--orange);color:#fff;padding:14px 16px;border-radius:18px;
  box-shadow:0 12px 32px rgba(226,74,27,.42);font-size:12.5px;font-weight:600;
  transition:.22s;opacity:0;transform:translateY(20px);pointer-events:none;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{transform:translateY(-4px);background:#F2591F}

/* ---------------- 滚动入场 ---------------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .hero-in{grid-template-columns:1fr;gap:44px}
  .video-card{max-width:560px}
  .metrics{grid-template-columns:repeat(3,1fr)}
  .metric:nth-child(3){border-right:0}
  .metric{border-bottom:1px solid rgba(255,255,255,.10)}
  .about-in,.contact-in,.proto-in,.case-detail{grid-template-columns:1fr;gap:34px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps li::after{display:none}
}
@media (max-width:820px){
  .nav-links{
    position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:8px 20px 20px;border-bottom:1px solid var(--line);
    box-shadow:0 18px 34px rgba(11,53,78,.12);
    clip-path:inset(0 0 100% 0);opacity:0;pointer-events:none;transition:.28s;
  }
  .nav-links.open{clip-path:inset(0 0 0 0);opacity:1;pointer-events:auto}
  .nav-links>a{padding:13px 4px;border-bottom:1px solid #F0F5F7;font-size:16px}
  .nav-links>a.btn{margin-top:14px;border-bottom:0;text-align:center}
  .nav-burger{display:flex}
  .section{padding:64px 0}
  .hero{padding-top:104px;padding-bottom:48px}
  .video-card{max-width:100%}
  .video-note{display:none}
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric{border-right:1px solid rgba(255,255,255,.10)}
  .metric:nth-child(2n){border-right:0}
  .f-row{grid-template-columns:1fr;gap:0}
  .dept{grid-template-columns:1fr}
  .layer{grid-template-columns:56px 1fr;gap:12px;padding:15px 18px}
  .layer span{grid-column:1/-1;font-size:13.4px;opacity:.85}
  .steps{grid-template-columns:1fr}
  .flow,.case-detail,.lead-form{padding:26px 20px}
  .lead-form{padding:26px 20px}
  .foot-in{grid-template-columns:1fr 1fr;gap:30px}
  .float-cta span{display:none}
  .float-cta{padding:15px;border-radius:50%}
  .hero h1{font-size:34px}
  .cd-stats{gap:22px}
}
@media (max-width:520px){
  .metrics{grid-template-columns:1fr}
  .metric{border-right:0}
  .foot-in{grid-template-columns:1fr}
  .video-card{max-width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* ============================================================
   内页（解决方案 / 成功案例 / 常见问题 / 关于我们）· 追加样式
   仅新增类，不覆盖上方任何既有规则
   ============================================================ */

/* ---------------- 导航当前项 ---------------- */
.nav-links>a.on{color:var(--navy);font-weight:600}
.nav-links>a.on::after{right:0}

/* ---------------- 内页标题区 ---------------- */
.page-hero{position:relative;overflow:hidden;background:var(--navy);color:#C9DCE6;padding:132px 0 74px}
.page-hero-in{position:relative}
.page-hero h1{font-size:clamp(30px,4.2vw,50px);color:#fff;letter-spacing:-.4px;line-height:1.22;max-width:960px}
.page-hero-lead{margin-top:22px;font-size:16.5px;line-height:1.95;color:#B8CFDC;max-width:760px}
.page-hero-lead strong{color:#fff;font-weight:600}
.page-hero .page-hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.page-hero .hero-points{margin-top:30px}

.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:#7E9BAD;margin-bottom:22px}
.crumb a{color:#9FBACB;transition:.18s}
.crumb a:hover{color:var(--mint)}
.crumb i{font-style:normal;opacity:.5}
.crumb span{color:#8FF0DF}

/* ---------------- 锚点索引条 ---------------- */
.sol-index,.case-strip{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:22px 0}
.sol-chips,.case-chips{display:flex;flex-wrap:wrap;gap:10px}
.chip-dark{
  background:#fff;border-color:var(--line);color:var(--navy);
  font-family:inherit;font-size:14px;padding:9px 16px;display:inline-block;
}
.chip-dark:hover{background:rgba(63,207,182,.14);border-color:var(--mint);color:var(--navy);transform:translateY(-2px)}

/* ---------------- 窄栏容器 / 通用间距 ---------------- */
.wrap-narrow{max-width:900px}
.mt{margin-top:26px}
.mt-lg{margin-top:52px}
.mt-xl{margin-top:72px}

/* ---------------- 方案 / 案例内容盒 ---------------- */
.sol-grid{gap:22px}
.sol-box{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;transition:.22s;
}
.sol-box:hover{border-color:#BFE6DD;box-shadow:var(--shadow)}
.sol-box-wide{margin-top:26px}
.sol-box-ok{background:rgba(63,207,182,.10);border-color:rgba(63,207,182,.36)}
.sol-box h4{
  color:var(--navy);font-size:15.5px;letter-spacing:.3px;margin:0 0 14px;
  padding-left:12px;border-left:3px solid var(--mint);line-height:1.4;
}
.sol-box h4 b{font-weight:700}
.sol-box h4+p{margin-top:-6px}

.sol-note{margin-top:16px;font-size:13.8px;line-height:1.8;color:#667982}
.sol-note strong{color:var(--navy)}

.sol-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{
  font-size:12.5px;padding:5px 12px;border-radius:6px;background:#fff;
  border:1px solid var(--line);color:var(--teal);font-weight:500;
}

/* ---------------- 量化指标条 ---------------- */
.sol-metrics{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;
  margin-top:26px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 20px;
}
.sm{text-align:center;padding:6px 10px}
.sm b{
  display:block;font-size:24px;color:var(--navy);font-weight:700;line-height:1.25;
  letter-spacing:-.3px;font-variant-numeric:tabular-nums;
}
.sm span{display:block;margin-top:6px;font-size:12.5px;color:#6B8698;line-height:1.55}

/* ---------------- V 模型交付路径 ---------------- */
.sol-flow{margin-top:26px;background:var(--navy);border-radius:var(--radius);padding:26px 24px;color:#B8CFDC}
.sol-flow h4{color:#fff;font-size:15.5px;margin-bottom:16px;letter-spacing:.3px}
.sol-path{display:flex;flex-wrap:wrap;align-items:center;gap:8px 6px;font-size:13px;line-height:1.5}
.sol-path span{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  border-radius:7px;padding:6px 11px;color:#EAF6FA;
}
.sol-path i{font-style:normal;color:rgba(255,255,255,.4)}

/* ---------------- 案例事实清单 ---------------- */
.case-body-grid{gap:22px;margin-top:8px}
.case-facts{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.case-facts li{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;font-size:14.2px}
.case-facts>li>span{
  flex:0 0 136px;color:var(--teal);font-weight:600;font-size:13.2px;letter-spacing:.2px;
}
.case-facts>li>b{flex:1 1 200px;color:#4A5D67;font-weight:400;line-height:1.75}
.case-facts>li>b.warn{color:var(--orange);font-weight:700}
.case-facts a{color:var(--teal);font-weight:700;text-decoration:none}
.case-facts a:hover{text-decoration:underline}

/* ---------------- 内页表格与对比表 ---------------- */
.case-table-grid{gap:22px;align-items:start}

.table-scroll{
  overflow-x:auto;-webkit-overflow-scrolling:touch;
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  box-shadow:var(--shadow);
}
.cmp{width:100%;border-collapse:collapse;min-width:720px;font-size:14.2px}
.cmp caption{
  caption-side:top;text-align:left;padding:16px 20px 14px;
  font-size:13.2px;color:#7C93A0;border-bottom:1px solid var(--line);
}
.cmp th,.cmp td{padding:15px 18px;text-align:left;vertical-align:top;line-height:1.75}
.cmp thead th{
  background:var(--bg-soft);color:var(--navy);font-size:14.6px;
  border-bottom:1px solid var(--line);white-space:nowrap;
}
.cmp thead th:first-child{white-space:normal;min-width:132px}
.cmp thead th.cmp-us{background:rgba(63,207,182,.16);color:var(--navy)}
.cmp tbody th{
  font-weight:600;color:var(--ink);background:var(--bg-soft);
  border-right:1px solid var(--line);min-width:132px;
}
.cmp tbody tr+tr th,.cmp tbody tr+tr td{border-top:1px solid var(--line)}
.cmp td{color:#5B6E78}
.cmp td.cmp-us{background:rgba(63,207,182,.07);color:#3C4F59}
.cmp tbody tr:hover td{background:#FAFDFE}
.cmp tbody tr:hover td.cmp-us{background:rgba(63,207,182,.12)}
.cmp-plain{min-width:480px}
.cmp-plain td{font-size:13.8px}
.cmp-note{
  margin-top:22px;padding:16px 20px;background:#EEF4F7;border-radius:12px;
  font-size:13.8px;line-height:1.85;color:#5B6E78;
}
.cmp-note strong{color:var(--navy)}

/* ---------------- FAQ ---------------- */
.faq{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.22s;
}
.faq-item[open]{border-color:rgba(63,207,182,.5);box-shadow:var(--shadow)}
.faq-item:hover{border-color:#BFE6DD}
.faq-item>summary{
  display:flex;align-items:flex-start;gap:14px;cursor:pointer;list-style:none;
  padding:20px 22px;
}
.faq-item>summary::-webkit-details-marker{display:none}
.faq-item>summary::marker{content:""}
.faq-item>summary b{
  flex:0 0 auto;font-size:13px;color:var(--teal);font-weight:700;letter-spacing:1px;
  background:rgba(63,207,182,.14);border-radius:7px;padding:4px 9px;line-height:1.5;
}
.faq-item>summary span{flex:1;color:var(--ink);font-weight:600;font-size:16.5px;line-height:1.6}
.faq-item>summary i{
  flex:0 0 auto;width:20px;height:20px;position:relative;margin-top:5px;transition:.22s;
}
.faq-item>summary i::before,.faq-item>summary i::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--teal);border-radius:2px;
}
.faq-item>summary i::before{width:13px;height:2px;transform:translate(-50%,-50%)}
.faq-item>summary i::after{width:2px;height:13px;transform:translate(-50%,-50%)}
.faq-item[open]>summary i{transform:rotate(135deg)}
.faq-body{padding:0 22px 22px 63px;border-top:1px solid var(--line);padding-top:18px}
.faq-body p{font-size:15px;line-height:1.9;color:#5B6E78}
.faq-body p+p{margin-top:12px}
.faq-body p strong{color:var(--navy)}
.faq-body .ticks{margin-top:14px}
.faq-quote{
  margin-top:14px;padding:12px 16px;background:var(--bg-soft);border-left:3px solid var(--mint);
  border-radius:0 10px 10px 0;font-size:14.6px;color:var(--navy);font-weight:600;
}

/* ---------------- 联系信息网格 ---------------- */
.contact-grid{gap:22px;align-items:start}

/* ---------------- 底部转化区 ---------------- */
.cta-band{
  background:linear-gradient(120deg,#0B354E 0%,#10496A 58%,#12627A 100%);
  color:#C9DCE6;padding:78px 0;text-align:center;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;width:620px;height:620px;left:-160px;top:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(63,207,182,.18),transparent 65%);
}
.cta-band .wrap{position:relative}
.cta-band h2{color:#fff;font-size:clamp(26px,3.2vw,38px);letter-spacing:-.3px}
.cta-band p{margin:18px auto 0;max-width:780px;font-size:16px;line-height:1.9;color:#A9C3D2}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px}
.cta-note{margin-top:24px;font-size:13.4px;color:#8FA9BA;line-height:1.8}

/* ---------------- 内页响应式 ---------------- */
@media (max-width:1080px){
  .cmp{min-width:660px}
}
@media (max-width:820px){
  .page-hero{padding:104px 0 58px}
  .page-hero h1{font-size:clamp(26px,7vw,34px)}
  .sol-index,.case-strip{padding:18px 0}
  .case-facts>li>span{flex:0 0 100%}
  .faq-body{padding-left:22px}
  .faq-item>summary{padding:17px 18px;gap:10px}
  .faq-item>summary span{font-size:15.6px}
  .cta-band{padding:58px 0}
  .sm b{font-size:21px}
}
@media (max-width:520px){
  .sol-chips,.case-chips{gap:8px}
  .chip-dark{font-size:13px;padding:8px 13px}
  .sol-box{padding:22px 18px}
  .about-in{gap:30px}
}